US20060002340A1 - Wireless software upgrades with version control - Google Patents
Wireless software upgrades with version control Download PDFInfo
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- US20060002340A1 US20060002340A1 US11/214,395 US21439505A US2006002340A1 US 20060002340 A1 US20060002340 A1 US 20060002340A1 US 21439505 A US21439505 A US 21439505A US 2006002340 A1 US2006002340 A1 US 2006002340A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/60—Software deployment
- G06F8/65—Updates
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/42136—Administration or customisation of services
- H04M3/42178—Administration or customisation of services by downloading data to substation equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
- H04W8/24—Transfer of terminal data
- H04W8/245—Transfer of terminal data from a network towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
- H04M2207/18—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place wireless networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Software Systems (AREA)
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- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
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- Mobile Radio Communication Systems (AREA)
Abstract
A wireless communication system includes a system backbone, a host computer coupled to the system backbone, at least one base station coupled to the system backbone, the at least one base station including a base station transceiver for communicating wirelessly with mobile devices within the system, and at least one mobile device having a mobile device transceiver for communicating wirelessly with the host computer on the system backbone via the at least one base station. A method of operation includes the steps determining whether a version of operating software stored in the at least one mobile device is a current version of the operating software, and wirelessly updating the operating software stored in the at least one mobile device if it is determined that the operating software stored in the at least one mobile device is not the current version.
Description
- This application is a continuation of U.S. patent application Ser. No. 10/643,105 filed on Aug. 18, 2003, which is a continuation of U.S. patent application Ser. No. 09/876,491 filed on Jun. 7, 2001 and issued as U.S. Pat. No. 6,735,434, which is a continuation of U.S. patent application Ser. No. 09/234,813 filed on Jan. 21, 1999 and issued as U.S. Pat. No. 6,308,061, which is a continuation-in-part of U.S. patent application Ser. No. 09/208,785 filed on Dec. 10, 1998 and issued as U.S. Pat. No. 6,643,506, which is a continuation-in-part of U.S. patent application Ser. No. 09/023,857 filed on Feb. 13, 1998 and issues as U.S. Pat. No. 6,031,830 which is a continuation of U.S. patent application Ser. No. 08/694,637 filed on Aug. 7, 1996 and issued as U.S. Pat. No. 5,848,064. The entire disclosures of these earlier applications are hereby incorporated by reference.
- The present invention relates generally to wireless software upgrades in wireless communication systems. More particularly, the present invention relates to a system and method in which software upgrades are provided wirelessly to mobile devices upon detecting that software currently in the mobile devices is outdated.
- In recent years, the use of wireless (e.g., cellular) communication systems having mobile devices which wirelessly communicate with a network, such as a local area network (LAN) and a wide area network (WAN), has become widespread. Retail stores and warehouses, for example, may use cellular communications systems to track inventory and replenish stock. The transportation industry may use such systems at large outdoor storage facilities to keep an accurate account of incoming and outgoing shipments. In manufacturing facilities, such systems are useful for tracking parts, completed products, defects, etc.
- A typical cellular communication system includes a number of fixed base stations or access points interconnected by a cable medium often referred to as a system backbone. Also included in many cellular communication systems are intermediate base stations which are not directly connected to the system backbone. Intermediate base stations, often referred to as wireless base stations or repeaters, increase the area within which base stations connected to the system backbone can communicate with mobile devices. Unless otherwise indicated, the term “base station” will hereinafter refer to both base stations hardwired to the network and wireless base stations.
- Associated with each base station is a geographic cell. A cell is a geographic area in which a base station has sufficient signal strength to transmit data to and receive data from a mobile device with an acceptable error rate. Typically, base stations will be positioned along the backbone such that the combined cell area coverage from each base station provides full coverage of a building or site. Thus, mobile devices roaming within such an area can maintain continuous communication with a host computer or other device situated along the system backbone.
- Each mobile device roaming within a building or site is typically preloaded with software to provide both application level and operational level instructional code (referred to generally herein as “operating software”). The mobile device includes one or more processors which execute the operating software, thereby allowing the mobile device to carry out its appropriate functions. The software is stored in memory in the mobile device and may be executed at any time depending on the particular operational needs of the mobile device.
- Due to changing market needs and advancements in technology, for example, it often happens that the software which is preloaded into a mobile device becomes outdated prior to the time the mobile hardware device becomes obsolete. Therefore, a number of methods for upgrading the operating software stored in a mobile device have been developed.
- One known method for updating software in a mobile device is by physically connecting the mobile device to a computer capable of upgrading the software. In order to upgrade software using this technique it is typically necessary to employ one or more service technicians to assist in connecting the mobile device to the computer with a cable or the like and executing the software upgrade routine. This results in down time for the mobile device and related service costs.
- Another known method of updating the operating software in a mobile device involves wirelessly transmitting software upgrades to the mobile device. When executing a wireless software upgrade, a mobile device transmits a request to the host computer (via a base station) requesting that the host computer transfer the upgraded software. In order to ensure a mobile device has the most recent version of the operating software, each program within the operating software must be downloaded periodically from the host computer and stored in the mobile device. Unfortunately, the periodic transfer of upgraded operating software to the mobile device can be extremely time consuming and becomes increasingly more time consuming as the number of mobile devices within the system increases. Furthermore, since there is no way to determine if software has been changed since the previous time the mobile device software has been upgraded, time is frequently wasted updating the mobile device operating software with the same version of software which already exists in the mobile device.
- In view of the aforementioned shortcomings associated with existing systems and techniques for upgrading mobile device operating software, there is a strong need in the art for a system and method which does not require significant down time or service costs. Moreover, there is a strong need in the art for a system and method which avoids the inefficiencies associated with conventional wireless techniques for upgrading the mobile device operating software.
- A wireless communication system and method is provided in which software upgrades are wirelessly transmitted to a mobile device based on a determination of whether such an upgrade is necessary. According to one embodiment, following an initial boot-up procedure in which a mobile device associates itself with a base station connected to a backbone, a host computer coupled to the backbone queries the mobile device for indicia identifying the version of operating software stored in the mobile device. In response, the mobile device wirelessly transmits to the host computer the indicia identifying the version of its operating software via the base station. The host computer performs a comparison of the version indica provided from the mobile device with information identifying the version of corresponding operating software presently stored within an FTP or TFTP server which maintains the latest version available for each operating software. If the host computer determines the mobile device is not running the latest version of the operating software, the host computer transmits a request to the mobile device to have its operating software updated. In response to receiving the request, the mobile device communicates with the file transfer protocol (FTP) or trivial file transfer protocol (TFTP) server coupled to the backbone to have the latest versions of software downloaded. If the host computer determined that no update of the mobile device operating software was needed, the mobile device simply continues to operate using the operating software currently stored therein. In this manner, the system does not needlessly spend time replacing the operating software in the mobile devices with the same software.
- Furthermore, the system and method of the present invention also allows a user to select one or more different packages of operating software which may be available from the FTP server. A user may simply select a package of operating software from a menu provided by the mobile device, and in response the mobile device prompts the FTP server to download the selected package to the mobile device. According to another feature of the invention, a WAN includes a plurality of communication systems tied together by a WAN based system backbone. A WAN based host computer provides updated information regarding the most current operating software available via the FTP server to all other host computers in the individual systems. A WAN based FTP server provides updated mobile terminal operating software to the FTP server in the individual systems. The mobile device operating software can then be distributed quickly to the various mobile devices.
- In accordance with one particular aspect of the invention, a wireless communication system includes a system backbone, a host computer coupled to the system backbone, at least one base station coupled to the system backbone, the at least one base station including a base station transceiver for communicating wirelessly with mobile devices within the system, and at least one mobile device having a mobile device transceiver for communicating wirelessly with the host computer on the system backbone via the at least one base station. A method of operation includes the steps of determining whether a version of operating software stored in the at least one mobile device is a current version of the operating software, and wirelessly updating the operating software stored in the at least one mobile device if it is determined that the operating software stored in the at least one mobile device is not the current version.
- In accordance with another particular aspect of the invention, a wireless communication system includes a system backbone, a host computer coupled to the system backbone, an FTP server coupled to the system backbone, at least one base station coupled to the system backbone, the at least one base station including a base station transceiver for communicating wirelessly with mobile devices within the system, and at least one mobile device having a mobile device transceiver for communicating wirelessly with the host computer and the FTP server on the system backbone via the at least one base station. A method of operation includes the steps of the host computer requesting from the at least one mobile device indicia indicative of a version of mobile device operating software stored in the at least one mobile device, the at least one mobile device transmitting the indicia indicative of the version of mobile device operating software stored in the at least one mobile device to the host computer, the host computer receiving the indicia indicative of the version of mobile device operating software stored in the at least one mobile device, and the host computer determining whether updating of the mobile device operating software is appropriate based on an initial comparison in which the indicia indicative of mobile device operating software stored in the at least one mobile device is compared to an indicia of a current version of mobile device operating software stored in at least one of the host computer and the FTP server.
- In accordance with still another aspect of the invention, a wireless communication system is provided. The wireless communication system includes a system backbone, a host computer coupled to the system backbone, an FTP server coupled to the system backbone, at least one base station coupled to the system backbone, the at least one base station including a base station transceiver for communicating wirelessly with mobile devices within the system, at least one mobile device having a mobile device transceiver for communicating wirelessly with the host computer and FTP server on the system backbone via the at least one base station, and wherein the host computer and the at least one mobile device are operatively configured to determine whether to selectively update mobile device operating software therebetween based on an initial comparison in accordance with a predetermined criteria indicative of whether updating of the mobile device operating software is appropriate, and the FTP server and the at least one mobile device are operatively configured to communicate selectively the mobile device operating software determined to be appropriate for updating.
- In accordance with yet another aspect of the invention, a wireless communication system is provided. The wireless communication system includes a system backbone, a host computer coupled to the system backbone, an FTP server coupled to the system backbone, at least one base station coupled to the system backbone, the at least one base station including a base station transceiver for communicating wirelessly with mobile devices within the system, at least one mobile device having a mobile device transceiver for communicating wirelessly with the host computer and the FTP server on the system backbone via the at least one base station, and a user input for receiving a user selection, and wherein the FTP server and the at least one mobile device are operatively configured to communicate selectively mobile device operating software therebetween based on the user selection.
- To the accomplishment of the foregoing and related ends, the invention, then, comprises the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative embodiments of the invention. These embodiments are indicative, however, of but a few of the various ways in which the principles of the invention may be employed. Other objects, advantages and novel features of the invention will become apparent from the following detailed description of the invention when considered in conjunction with the drawings.
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FIG. 1 is a block diagram of a wireless communication system in accordance with an exemplary embodiment of the present invention; -
FIG. 2 is a block diagram of a mobile terminal in accordance with the present invention; -
FIG. 3 a is a block diagram of a host computer in accordance with the present invention; -
FIG. 3 b is a block diagram of an FTP server in accordance with the present invention; -
FIG. 4 illustrates the contents of a bootptab table stored in memory within the host computer, the bootptab table including the internet protocol (IP) addresses and boot file package names associated with each mobile terminal in the system in accordance with the present invention; -
FIG. 5 a illustrates the general format of the package definition files stored in memory within the host computer, wherein each package definition file includes information identifying operating software to be used by mobile terminals within the system and information indicating the version of the operating software in accordance with the present invention; -
FIGS. 5 b, 5 c and 5 d represent exemplary package definition files in accordance with the present invention; -
FIG. 6 is a block diagram of a base station in accordance with the present invention; - FIGS. 7(a)-7(e) represent schematically a process in which information packets are exchanged between a mobile terminal and the host computer (via a base station) in order to identify and transfer upgraded operating software in accordance with an exemplary embodiment of the present invention;
- FIGS. 7(f)-7(i) represent schematically a process in which information packets are exchanged between a mobile terminal and the FTP server (via a base station) in order to download updated operating software in accordance with an exemplary embodiment of the present invention;
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FIGS. 8 a and 8 b is a system flowchart suitable for programming a mobile terminal to request and download upgraded operating software in accordance with the present invention; -
FIG. 9 is a system flowchart suitable setting up the host computer to respond to the mobile terminal in accordance with the present invention; -
FIG. 10 is a system flowchart suitable for setting up the FTP server in accordance with the present invention; -
FIG. 11 is a system flowchart suitable for programming the mobile terminal and setting up the host computer and FTP server to enable a user to select from among different packages of operating software available from the FTP server in accordance with the present invention; -
FIG. 12 is a block diagram of a WAN based system in accordance with the present invention; -
FIG. 13 a illustrates the general format of the package definition files stored in memory within the host computer, wherein each package definition file includes information identifying operating software to be used by mobile terminals within the system and information indicating the version of the operating software in accordance with an alternative embodiment of the present invention; -
FIGS. 13 b, 13 c and 13 d represent exemplary package definition files in accordance with an alternative embodiment of the present invention; - FIGS. 14(a)-14(h) represent schematically a process in which information packets are exchanged between a mobile terminal and the host computer (via a base station) in order to identify and transfer upgraded operating software in accordance with an alternative embodiment of the present invention;
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FIG. 15 is a system flowchart suitable for programming a mobile terminal to request and download upgraded operating software from the host computer in accordance with an alternative embodiment of the present invention; and -
FIG. 16 is a system flowchart suitable setting up the host computer to respond to the mobile terminal seeking upgraded operating software in accordance with an alternative embodiment of the present invention. - The present invention will now be described with reference to the drawings wherein like reference numerals are used to refer to like elements throughout.
- As is mentioned above, the present invention relates to wireless (e.g., cellular) communication systems which include mobile devices that can roam from cell to cell. Such mobile devices can be data terminals, telephones, pagers, etc. In the exemplary embodiment described hereinafter, each mobile device is a mobile data terminal (hereinafter “mobile terminal”) used to communicate data such as inventory or the like within a cellular system. However, it is recognized that the invention contemplates other types of mobile devices and is not intended to be limited to systems utilizing mobile terminals.
- Referring now to
FIG. 1 , acellular communication system 20 is shown in accordance with the exemplary embodiment of the present invention. Thecellular communication system 20 includes anetwork 22 having asystem backbone 24. Thesystem backbone 24 may be a hardwired data communication path made of twisted pair cable, shielded coaxial cable or fiber optic cable, for example, or may be wireless in nature. Connected to thesystem backbone 24 areseveral base stations 26. Eachbase station 26 serves as an entrance point through which wireless communications may occur with thesystem backbone 24. Additionally, in order to expand the effective communication range of thebase stations 26, one or morewireless base stations 28 are also included in thecellular communication system 20. As is conventional, eachwireless base station 28 associates itself, typically by registration, with another base station, whether hardwired or wireless, such that a link is formed between itself and other devices situated on thesystem backbone 24. For example, in thesystem 20 shown inFIG. 1 a wireless base station 28 associates itself with one of thebase stations 26 connected to thesystem backbone 24 so that a communication link is formed between thewireless base station 28 and ahost computer 30 also coupled to thesystem backbone 24. All communications between thewireless base station 28 and a device on thesystem backbone 24 are made possible by the other base stations on the link which are configured to relay communications therebetween. - Each
base station system 20 via anantenna 32. Ageographic cell 34 associated with eachbase station antenna 32 selected and the output power of the respective base station, thecell 34 may take one of several different forms and sizes. For example,FIG. 1 depicts thebase stations - The
cellular communication system 20 also includes one or moremobile terminals 36. Eachmobile terminal 36 communicates with devices on thesystem backbone 24 via a selectedbase station mobile terminals 36. Upon roaming from onecell 34 to another, themobile terminal 36 is configured to associate itself with anew base station - In addition to the
host computer 30, a file transfer protocol (FTP) server is also coupled to thesystem backbone 24. While the present embodiment depicts an FTP server, it will be appreciated that a trivial file transfer protocol (TFTP) server could alternatively be used. For purposes of this invention and accompanying claims, both the FTP server and TFTP server will be generally referred to asFTP server 31. As will be described in more detail below, theFTP server 31 maintains the most current versions of all mobile terminal operating software. Accordingly, when themobile terminal 36 needs to update its operating software, themobile terminal 36 downloads the latest software from theFTP server 31. While in the present embodiment theFTP server 31 is depicted to be independent of thehost computer 30 it will be appreciated that theFTP 31 server could be embedded within thehost computer 30. Alternatively, thehost computer 30 could be programmed to perform the functions of theFTP server 31 in which case theFTP server 31 would not be included in thecellular communication system 20. Furthermore, thecellular communication system 20 may include one or moreother devices 37 connected to thesystem backbone 24.Such devices 37 may include work terminals, printers, cash registers, etc. - In the exemplary embodiment, the
host computer 30 is responsible for supporting the network activities of themobile terminals 36 within thesystem 20. As part of such function, thehost computer 30 is responsible for determining whether themobile terminals 36 have the most current versions of software and, if updating is needed, indicating to themobile terminals 36 which operating software needs to be updated. When amobile terminal 36 within the system initially powers up (via an on/off switch for example) or is reset, themobile terminal 36 goes through an initialization, or boot-up routine. Such routine includes communicating with thehost computer 30 via a selectedbase station 26 in order that thehost computer 30 provides themobile terminal 36 with its internet protocol (IP) address as is conventional. In addition, however, just following the boot up routine, or at any time thereafter, thehost computer 30 requests from the mobile terminal indica which identifies which version of operating software the mobile terminal is running. Thehost computer 30 then compares the version of operating software stored within themobile terminal 36 with the latest version of software known to be available in theFTP server 31. If themobile terminal 36 has a different version of operating software stored as compared to the version currently available in theFTP server 31, it is assumed that the operating software in theFTP server 31 has been upgraded since the last time themobile terminal 36 has logged on. Consequently,host computer 31 transmits a request to themobile terminal 36 requesting themobile terminal 36 to have its operating software updated. Upon receiving the request, themobile terminal 36 initiates an exchange with theFTP server 31 to download the latest version of operating software available. In the event the version of the operating software stored in theFTP server 31 is the same version as that which is currently stored in themobile terminal 36, thehost computer 30 does not request themobile terminal 36 to update its operating software. In this manner, needless downloading of files is avoided. - Accordingly, when a system operator wishes to change the operating software of one or more
mobile terminals 36 within thesystem 20, the system operator loads the upgraded software into theFTP server 31 as discussed below. Included with each version of operating software is a unique identifier indicative of the particular version. The system administrator also updates the host computer to correspondingly reflect the modifications to the current software loaded in the FTP server. In particular, the system administrator updates the host computer with sufficient information to communicate those fields provided in the package definition files discussed below with respect toFIGS. 5 a-5 d. Then, when amobile terminal 36 is next queried by the host computer regarding which version of operating software is being run, themobile terminal 36 will be informed by thehost computer 30 that theFTP server 31 has an upgraded version causing themobile terminal 36 to request that the upgraded operating software be downloaded from theFTP server 31. -
FIG. 2 is a block diagram representing the basic structure of each of the mobile terminals according to the exemplary embodiment. Eachmobile terminal 36 includes aprocessor 40 which can be programmed to control and to operate the various components within themobile terminal 36 in order to carry out the various functions described herein. Theprocessor 40 may be, for example, an Intel 80486 or similar type microprocessor. Theprocessor 40 is coupled to auser input device 42 which allows a user to input data to be communicated to thesystem backbone 24 such as inventory data, patient information, etc. This information may be sent to thehost computer 30 which serves as a central data location, for example, or to a cash register connected to thesystem backbone 24, as another example, for providing price information. Furthermore, theinput device 42 allows a user to input a software availability request as is discussed in more detail below. Theinput device 42 can include such items as a keypad, touch sensitive display, etc. Themobile terminal 36 also may include abar code reader 44 coupled to theprocessor 40 for providing another form of data input. Adisplay 46 is also connected to and controlled by theprocessor 40 via adisplay driver circuit 48. Thedisplay 46 serves as a means for displaying information stored within themobile terminal 36 and/or received over thesystem backbone 24 via abase station 26. Thedisplay 46 can be a flat panel liquid crystal display with alphanumeric capabilities, for example, or any other type of display as will be appreciated. - Each
mobile terminal 36 also includes amemory 50 for storing program code executed by theprocessor 40 for carrying out the functions described herein. In particular, thememory 50 includes a non-volatile portion (e.g., an EEPROM) for storing mobile terminal operating software which is executed by theprocessor 40 in order to carry out the desired operations of themobile terminal 36. The particular operating software is not critical to the invention and it will suffice to say that such operating software typically will be related to the application of the mobile terminal, e.g., communication protocols, utility programs such as for inventory control, patient care, etc. As noted above, however, it may be desirable at times to upgrade such operating software with revised and/or completely different software. Thus, thememory 50 also has stored therein code which is executed by theprocessor 40 in order to perform the functions described below in relation to FIGS. 7(a)-7(i) andFIG. 15 for downloading upgraded software from theFTP server 31. The actual code for performing such functions can be easily programmed by a person having ordinary skill in the art of computer programming in any of a number of conventional programming languages based on the disclosure herein. Consequently, further detail as to the particular code itself has been omitted for sake of brevity. - As is described below in more detail in connection with FIGS. 7(a)-7(i) and
FIG. 15 , theprocessor 40 also stores in thememory 50 information relating to the version of mobile terminal operating software stored therein. Theprocessor 40 is programmed to download operating software from theFTP server 31 if the update indicia received from thehost computer 30 indicates that theFTP server 31 has stored therein more current versions of the operating software. If theprocessor 40 does download current versions of operating software, theprocessor 40, in one embodiment, goes on to replace the previous operating software which was stored in thememory 50 with the upgraded operating software obtained from theFTP server 31. - Each
mobile terminal 36 also includes its ownRF transceiver section 54 connected to theprocessor 40. TheRF transceiver section 54 includes anRF receiver 56 which receives RF transmissions from abase station antenna 58 and demodulates the signal to obtain the digital information modulated therein. An example of asuitable RF receiver 56 for use in the mobile terminal 36 (as well as thebase stations 26, 28) is the Model 025 Direct Sequence Spread Spectrum Radio Module, which is commercially available from Aironet Wireless Communications, Inc. of Akron, Ohio. - The
RF transceiver section 54 also includes anRF transmitter 60. In the event themobile terminal 36 is to transmit information to thebackbone 24 in response to an operator input atinput device 42 or as part of its boot-up routine, for example, theprocessor 40 forms digital information packets which are then delivered to theRF transmitter 60. According to conventional techniques, theRF transmitter 60 transmits an RF signal with the information packets modulated thereon via theantenna 58 to thebase station 26 with which themobile terminal 26 is registered. - Referring now to
FIG. 3 a, a block diagram of thehost computer 30 is provided. Thehost computer 30 may be a personal computer, for example, and includes its own processor 64 (e.g., an Intel 80486DX or Pentium® processor). Coupled to theprocessor 64 is amemory 66 for storing code for controlling the operation of thehost computer 30 in accordance with the description provided herein. Again, based on the description provided herein, a person having ordinary skill in the art of computer networks and system administration will be able to set up thehost computer 30 to support the various operations described herein. Accordingly, additional detail is omitted. Thememory 66 may include, but certainly is not limited to, a hard disk storage medium. - The
processor 64 is coupled to an input/output (I/O) port ordevice 68 as shown inFIG. 3 . The I/O device 68 may include a floppy disk drive or the like which enables a system operator to transfer upgraded mobile terminal operating software into thememory 66 using conventional file transfer techniques. Theprocessor 64 is coupled to thesystem backbone 24 by way of anetwork adaptor transceiver 70 andconnector 72 as is conventional. Thehost computer 30 is able to transmit and receive information over thesystem backbone 24 via thetransceiver 70 andconnector 72. - Referring now to
FIG. 3 b, a block diagram of theFTP server 31 is provided. Similar to thehost computer 30, theFTP server 31 includes aprocessor 65 coupled to thesystem backbone 24 through atransceiver 71 andconnector 73. Amemory 67 is coupled to theprocessor 65. As will be described in more detail below, thememory 67 is updated with the latest version of software for each of themobile terminals 36. For example, a system administrator may install revised versions of software in thememory 67. - As shown in
FIG. 4 , thememory 66 of thehost computer 30 has stored therein a bootptab table. Briefly, the bootptab table is maintained by theprocessor 64 of thehost computer 30 and is arranged to include an entry for each mobile terminal within thesystem 20. As shown inFIG. 4 , each entry includes the hardware address of the mobile terminal and the corresponding internet protocol (IP) address assigned to the mobile terminal. In addition, each entry includes a boot file in the form of a package name which identifies the particular package of operating software which is to be utilized by the correspondingmobile terminal 36. - Also stored in the
memory 66 is a collection of package definition files as represented inFIGS. 5 a-5 d. Specifically, thememory 66 includes a different package definition file for each particular package name included in the bootptab table shown inFIG. 4 .FIG. 5 a illustrates generally the various information fields included in each package definition file, whereasFIGS. 5 b-5 d provide illustrative examples of different package definition files. Each package definition file includes a version identifier (e.g., 6.2, A3, 1.9, etc.) which is a unique identifier of the particular version of the operating software associated with that particular package name. Each time one or more software files included in the operating software associated with a given package name is added, deleted or modified within theFTP server 31, the version identifier stored in the package definition file for that package name is modified to a new, unique identifier. The new identifier stored in the package definition files as discussed below is manually entered into thehost computer 30 by a system administrator or the like, for example. - Each package definition file also includes an indication of the total memory occupied by the operating software associated with the package name (e.g., 200 Kbytes, 150 Kbytes, etc.). In addition, each package definition file includes an indicator which indicates whether the operating software which is downloaded from the
FTP server 31 to the mobile terminal is to be downloaded in a “replace” or “fail safe” mode as is discussed in more detail below. Each package definition file also includes a list of filenames included in the operating software associated with the package name. As will be appreciated, such file names represent the files that are utilized by themobile terminal 36 to carry out its various operations. The actual contents of such files are conventional and are not germane to the invention. If, however, any of these files are deleted, added, or modified as described above, the version indicator is updated in the package definition file by the communication received from theFTP server 31 or directly by input from the system administrator. - Furthermore, each package definition file includes the mobile terminal path (e.g., the directory path) identifying where in the mobile
terminal memory 50 the respective files represented by the file names are to be stored. Each package definition file also includes an FTP server path (e.g., the directory path) indicating where in theFTP server memory 67 the respective files are stored. The package definition files also include information relating to the file type for each of the file names identified in the package definition, such type information being useful for facilitating downloading of the file as is conventional. For example, the type information may indicate that the file is currently stored in a compressed mode and needs to be decompressed upon receipt, etc. Finally, the package definition files include information relating to whether each of the files represented by the file names is to be stored in read only memory (ROM) or random access memory (RAM) in themobile terminal 36. - Each time a system administrator updates any portion of the operating software stored in the
memory 67, the system administrator also is responsible for assigning a new version identifier in the corresponding package definition file. For example, file names may be added or deleted from a package. Alternatively, one or more files may be modified. In either case, the operating software represents a new version. Once updated, the system administrator also updates thehost computer 30 with sufficient information to produce for themobile terminals 36 the package definition files discussed above with respect toFIGS. 5 a-5 d. - Referring now to
FIG. 6 , a block diagram representative of eachbase station 26 is shown. Eachbase station 26 is connected to thesystem backbone 24 via aconnector 80 such as a DB-9 or RJ-45 connector. Theconnector 80 is connected to thesystem backbone 24 at one end and to anetwork adapter transceiver 82 included in thebase station 26 at the other end. Thenetwork adapter transceiver 82 is configured according to conventional network adapter transceiver techniques to allow thebase station 26 to communicate over thesystem backbone 24. Thenetwork adapter transceiver 82 is also connected to aninternal bus 84 included within thebase station 26. Thebase station 26 further includes aprocessor 86 connected to thebus 84 for controlling and carrying out the operations of thebase station 26. Theprocessor 86 may include any of a variety of different microprocessors, such as the Motorola 68360 (25 MHz) or Intel 80386 microprocessors, for example. - The
base station 26 also includes amemory 88 connected to thebus 84. Thememory 88 stores program code executed by theprocessor 86 to control the other elements within thebase station 26 to carry out the functions referred to herein. Thememory 88 also serves to buffer information such as information received over thesystem backbone 24 or those transmitted to or received from themobile terminals 36. Also connected to thebus 24 is anRF transceiver section 90 included in thebase station 26. TheRF transceiver section 90 includes theaforementioned antenna 32 for receiving radio signals from and transmitting radio signals tomobile terminals 36 within thecell area 34 of thebase station 26. Information transmitted from amobile terminal 36 to thebase station 26 is received via theantenna 32 and is processed by anRF receiver 92 which demodulates and decodes the signal and converts the information to a digital signal. Theprocessor 86 in thebase station 26 then processes the information according to conventional techniques and stores the information in thememory 88 until such time as thebase station 26 is able to transmit the information to its intended destination on the system backbone 24 (e.g., the host computer 30) via thenetwork adapter transceiver 82 andconnector 80. - Information which is transmitted to the
base station 26 via the system backbone 24 (e.g., from the host computer 30) for transmission to amobile terminal 36 is received by thenetwork transceiver 82. Theprocessor 86 controls anRF transmitter 94 included in theRF transceiver section 90, theRF transmitter 94 also being connected to thebus 84. Theprocessor 86 causes theRF transmitter 94 to modulate an RF signal using spread spectrum techniques, for example, which in turn carries the information to the appropriatemobile terminal 36. Exemplary hardware for carrying out the above-described basic functions of transmitting and receiving data between thesystem backbone 24 and one or moremobile terminals 36 is found in the ARLAN 631® Token Ring Access Point, which is commercially available from Aironet Wireless Communications, Inc., Akron, Ohio. - FIGS. 7(a) through 7(h) schematically represent the exchange of information between a
mobile terminal 36 and thehost computer 30 in accordance with the exemplary embodiment of the invention. It will be appreciated that, with respect to communications between themobile terminal 36 and thehost computer 30, thebase station 26 to which themobile terminal 36 is registered serves as an interface between themobile terminal 36 and thehost computer 30 as is well known in the art. As represented inFIG. 7 (a), when themobile terminal 36 undergoes its boot-up initialization routine themobile terminal 36 transmits aBootp Request packet 100 to thehost computer 30. TheBootp Request packet 100 is a packet which includes a header field 102 (e.g., synchronization bits, etc., as is conventional), ahardware address field 103 which holds the hardware address of themobile terminal 36, and aboot request field 104 which contains information requesting that thehost computer 30 furnish information relating to the boot-up procedures of themobile terminal 36. TheBootp Request packet 100 is generated by theprocessor 40 within themobile terminal 36. - As is represented in
FIG. 7 (b), thehost computer 30 receives theBootp Request packet 100 and, in response, theprocessor 64 generates and transmits aBootp Response packet 110 back to themobile terminal 36. TheBootp Response packet 110 includes aheader 111; anIP address field 112 containing the IP address of themobile terminal 36; apackage name field 113 containing the name of the package of operating software associated with themobile terminal 36; and a bootresponse information field 114 containing other conventional information which may be associated with the boot-up procedures of themobile terminal 36. - More specifically, when the
host computer 30 receives theBootp Request packet 100 from themobile terminal 36, theprocessor 64 performs a look-up in the bootptab table stored in thememory 66 based on the hardware address contained in thehardware address field 103. Specifically, theprocessor 64 looks up the entry in the bootptab table having the same hardware address. Theprocessor 64 then takes the corresponding IP address and package name from the bootptab table and includes them in theIP address field 112 andpackage name field 113, respectively, of theBootp Response packet 110 which is transmitted to themobile terminal 36. Communication regarding the software stored in themobile terminal 36 may now occur by referring to the assigned package name. It will be appreciated that while in the present embodiment the boot up procedure is shown to generally follow a bootp protocol, a dynamic host configuration protocol (DHCP) could alternatively be used. Still further, the boot up procedure could optionally be avoided altogether by directly/manually inputting the needed boot up information into themobile terminal 36 including information such as, for example, the IP address of themobile terminal 36 and the name of the server with which themobile terminal 36 is to communicate. - Following this bootup routine, the
host computer 30 transmits aVersion Request Packet 118 to themobile terminal 36 as shown inFIG. 7 (c). Thehost computer 30 may transmit theVersion Request Packet 118 at some predetermined time after the bootup routine or may periodically send aVersion Request Packet 118 to themobile terminal 36 at multiple random or preset times, for example. TheVersion Request Packet 118 includes aheader 120; apackage name field 121; and aversion request field 122. TheVersion Request Packet 118 requests themobile terminal 36 to transmit back to thehost computer 30 the current version of operating software stored in memory 50 (FIG. 2 ). - In response to receiving the
Version Request Packet 118 themobile terminal 36 transmits to the host computer 30 aVersion Response Packet 124 as shown inFIG. 7 (d). TheVersion Response Packet 124 includes aheader 125; apackage name field 126; and aversion indicator field 127. Theversion indicator field 127 includes the latest version of operating software corresponding to thepackage name 126 stored in themobile terminal 36. - Following receipt of the
Version Response Packet 124, thehost computer 30 performs a comparison between the version indicator stored in theversion indicator field 127 and the version of the corresponding operating software stored in theFTP server 31. Once thehost computer 30 completes its comparison, thehost computer 30 transmits aFile Name Packet 128 to themobile terminal 36 as shown inFIG. 7 (e). TheFile Name Packet 128 includes aheader 129, and acomparison result field 133. In the event the comparison performed by thehost computer 30 showed that the version of operating software stored in themobile terminal 36 is the same as the latest version of corresponding operating software stored at theFTP server 31, thehost computer 30 includes indicia in the comparison result filed 133 indicating that no update is needed. In the present embodiment, when the versions are identical, thehost computer 30 includes the version of the operating software in thecomparison result field 133. Thus, upon receipt of theFile Name Packet 128, themobile terminal 36 is able to discern that no additional downloading of operating software is necessary. - If, on the other hand, the
host computer 30 determines from its comparison that the version of operating software stored in themobile terminal 36 does not match the version of operating software stored by theFTP server 31, thehost computer 30 includes in thecomparison result field 133 the file name of the file to be downloaded from theFTP server 31. Alternatively, in another embodiment, thecomparison result field 133 may include the contents of the package definition file for the corresponding package name (FIGS. 5 a-5 d). By providing themobile terminal 36 with the contents of the package definition file, themobile terminal 36 is informed not only that updated operating software is to be downloaded, but also the required memory, file transfer mode, memory paths, file types, etc. as discussed above with respect toFIGS. 5 a-5 d. - In the event the
mobile terminal 36 is informed that a download of updated operating software is needed, themobile terminal 36 downloads the appropriate software from theFTP server 31. - For example,
FIG. 7 (f) illustrates aFile Request Packet 130 which is generated by the mobileterminal processor 40 and which includes aheader 131 and afile request field 132. Thefile request field 132 includes the file name provided from theFTP server 31 which themobile terminal 36 is to download. - The
mobile terminal 36 transmits theFile Request Packet 130 to theFTP server 31 as represented inFIG. 7 (f), and in response theFTP server 31 forms aFile Packet 134 which is transmitted back to themobile terminal 36. TheFile Packet 134 includes aheader 135 and afile field 136. Thefile field 136 includes one or more files associated with the file name requested in thefile request field 132. Consequently, the files are downloaded to themobile terminal 36 where each of the files are, for example, flashed into the memory 50 (FIG. 2 ) and stored for use in the operations of the mobile terminal. - In an alternative embodiment of the present invention where, for example, the
host computer 30 returns apackage definition packet 128 to themobile terminal 36 inFIG. 7 (e) as opposed to a file name, themobile terminal 36 begins the process of sequentially stepping through each file name listed in the package definition file and transmitting a request that theFTP server 31 transfer the actual file so that it may be downloaded and stored in themobile terminal 36. Next, themobile terminal 36 generates and transmits anotherFile Request Packet 130 requesting that the next file included in the list of file names in thepackage definition field 126 be downloaded to themobile terminal 36. Similarly, theFTP server 31 responds by transmitting anotherFile Packet 134 including the contents of the file named in thefile request field 132. Such sequential exchange of file requests and the transfer of files between themobile terminal 36 and theFTP server 31 continues as represented in FIGS. 7(f)-7(i) until the mobile terminal has requested and received each of the files named in the Package Definition Packet received in thecomparison result field 133. Depending on the particular file transfer protocol utilized within the system, thefile request field 132 may also have such information as the location at which the particular file is stored in theFTP server 31, etc., as obtained from the package definition table 126. However, it will be appreciated that the actual file transfer protocol utilized in accordance with the present invention can be any well known transfer protocol and is not limited to any particular one. - Accordingly, it will be appreciated that files from the
FTP server 31 will not be downloaded to amobile terminal 36 until and unless it has been determined by thehost computer 30 that a new version of mobile terminal operating software exists in theFTP server 31. In the event it is determined that a new version exists, every file corresponding to a file name or package name is downloaded regardless of whether only one file or more than one of the files associated with the file name has been changed, added and/or deleted. - As explained above, when using the package definition file the amount of memory which the mobile terminal will need in order to download all of the files listed in the package definition file and the mode of replacing the information in the mobile terminal is provided to the mobile terminal by the
host computer 30. More particularly, there are two exemplary modes in which themobile terminal 36 may download the new version of the mobile terminal operating software to replace an old version. One method is known as the replace mode, and the second method is known as the fail safe mode. If the information in the package definition file indicates that themobile terminal 36 should be operating in the replace mode, then anytime there is a new version of operating software to be downloaded themobile terminal 36 is programmed to discard immediately the old version of each file prior to downloading the package of new files. The disadvantage of the replace mode is that it is possible that themobile terminal 36 will fail such as, for example, run out of memory space, experience an RF link failure or host computer failure, etc., prior to receiving all of the files of the new version. In this case, the mobile terminal will not have a complete copy of either the old or new versions. In the fail safe mode, however, all files in the old version remain saved in the mobile terminal memory until all files belonging to the new version have been downloaded successfully. Only after all of the files belonging to the new version have been received does themobile terminal 36 discard the old version of the files. Thus, themobile terminal 36 has the ability to operate using the old version in the event of a problem in downloading the new version. The disadvantage is that the fail safe mode requires more memory in themobile terminal 36 as compared to the replace mode. -
FIG. 8 (a) illustrates the basic operation of themobile terminal 36 in accordance with the procedures described above. Beginning instep 150, theprocessor 40 within themobile terminal 36 initiates its own internal boot-up routine upon being powered up and/or reset as is conventional. Next, instep 152 theprocessor 40 generates and transmits aBootp Request Packet 100 to thehost computer 30 as represented inFIG. 7 (a). Followingstep 152, theprocessor 40 determines instep 154 whether aBootp Response Packet 110 is received back from thehost computer 30 within a predetermined response period (e.g., five seconds). If not, theprocessor 40 returns to step 152 and retransmits theBootp Request Packet 100. If theBootp Response packet 110 is received by theprocessor 40 instep 154 as illustrated inFIG. 7 (b), theprocessor 40 proceeds to step 156 in which it determines whether aVersion Request Packet 118 has been received from thehost computer 30 as illustrated inFIG. 7 (c). If noVersion Request Packet 118 is received, theprocessor 40 proceeds to step 157 where it begins or continues operations in accordance with the operating software currently loaded therein. Following step 157, theprocessor 40 returns to step 156 to again determine if theVersion Request Packet 118 has been received. - If the
Version Request Packet 118 has been received, then theprocessor 40 continues to step 158 wherein theprocessor 40 transmits to thehost computer 30 theVersion Response Packet 124 as illustrated inFIG. 7 (d). Followingstep 158, the processor determines instep 159 whether aFile Name Packet 128 has been received from thehost computer 30 in response to theVersion Response Packet 124 within a predetermined response period (e.g., five seconds). If not, theprocessor 40 returns to step 158 and retransmits theVersion Response Packet 124. - Upon determining that a
File Name Packet 128 has been received instep 159, theprocessor 40 instep 160 determines whether thehost computer 30 has requested themobile terminal 36 to receive updated operating software. As discussed above, theprocessor 40 of themobile terminal 36 knows that a request to obtain updated operating software is made in those instances where thehost computer 30 includes a file name in thecomparison result field 133 as illustrated inFIG. 7 (e). Similarly, theprocessor 40 knows ifhost computer 30 has not requested that an updated be made if theprocessor 40 finds only indicia representative of the version of its operating software in thecomparison result field 133. Accordingly, if, theprocessor 40 determines that thehost computer 30 has not requested that any updates of themobile terminal 36 operating software be made, it is concluded that themobile terminal 36 will operate on the existing mobile terminal operating software stored therein and the processor proceeds to step 162. Instep 162, themobile terminal 36 continues normal operation with the operating software loaded thereon. - In the event the
processor 40 determines instep 160 that thehost computer 30 has requested that updated operating software be downloaded, theprocessor 40 continues to step 164 in which it stores in the memory 50 (FIG. 2 ) the file name to be downloaded. Theprocessor 40 then proceeds to step 166 in which it transmits aFile Request Packet 130 as represented inFIG. 7 (f) to theFTP server 31 in order to request that the files associated with the file name be transferred from theFTP server 31 to themobile terminal 36. Next, instep 168 theprocessor 40 determines if acorresponding File Packet 134 containing the requested files is received back from theFTP server 31 within a predetermined response period (e.g., five seconds). If not, theprocessor 40 proceeds to step 170 in which it retransmits the same file request previously transmitted instep 166. Theprocessor 40 then returns to step 168 as shown. - If the
File Packet 134 is received by theprocessor 40 as determined instep 168 and as represented inFIG. 7 (f), theprocessor 40 proceeds to step 172. Instep 172 theprocessor 40 stores each file contained in thefile field 136 in the mobileterminal memory 50 by, for example, flashing the memory with the updated files. Thereafter, theprocessor 40 proceeds fromstep 172 to step 162 mentioned above and ends the update procedure. - Regarding
steps processor 40 preferably is programmed to retransmit a respective packet only a predetermined number of times (e.g., five), and to terminate the routine in the event a response still is not received. This avoids the mobile terminal becoming hung up due to a system failure. In such case, theprocessor 40 allows themobile terminal 36 to continue to operate with the existing version of software stored therein. - Referring now to
FIG. 9 , the operation of thehost computer 30 is illustrated during the boot-up routine of themobile terminal 36. Beginning instep 200, thehost computer processor 64 determines if aBootp Request Packet 100 has been received from amobile terminal 36 as represented inFIG. 7 (a). If not, theprocessor 64 continues to loop throughstep 200. If aBootp Request Packet 100 is received, theprocessor 64 proceeds to step 202 in which theprocessor 64 transmits aBootp Response Packet 110 in response as represented inFIG. 7 (b). Next, instep 203, theprocessor 64 transmits aVersion Request Packet 118 to themobile terminal 36 as illustrated inFIG. 7 (c). In the present embodiment, theVersion Request Packet 118 is transmitted at a predetermined period of time of 10 seconds following the boot-up procedure. However, it will be appreciated that theVersion Request Packet 118 may be transmitted at one or more different times following boot-up. For example, theprocessor 64 may be configured to transmit aVersion Request Packet 118 following boot-up and following each update of operating software. - Next, in
step 204 theprocessor 64 determines if thehost computer 30 receives aVersion Response Packet 124 within a predetermined period of time (e.g., five seconds). If not, theprocessor 64 returns to step 200. Otherwise, upon receiving the Version Response Packet (as represented inFIG. 7 (c)), theprocessor 64 proceeds fromstep 204 to step 205. - In
step 205, theprocessor 64 of thehost computer 30 does a comparison of the version identifier of operating software provided from themobile terminal 36 with the version identifier of the corresponding software stored in theFTP server 31. If the versions are the same, theprocessor 64 stores in thecomparison result field 133 of theFile Name Packet 128 the current version number of the operating software being run by themobile terminal 36 so as to indicate to themobile terminal 36 that no further downloading of software is needed. If, however, the versions are different, theprocessor 64 stores in thecomparison result field 133 File Name of the packet to be downloaded from theFTP server 31. Next, instep 205, theprocessor 64 transmits back to themobile terminal 36 theFile Name Packet 128 having the appropriate contents filled into thecomparison result field 133 so as to either request or not request that the mobile terminal download updated, modified, or new operating software from theFTP server 31. - Those having ordinary skill in the art will appreciate that
steps FIG. 9 can be carried out by a Bootp server (not shown) included in thehost computer 30. - Throughout the routine described with respect to
FIG. 9 , theprocessor 64 of thehost computer 30 continually determines whether any software has been updated in theFTP server 31 and if so, thehost computer 30 immediately updates itsmemory 66. - Referring now to
FIG. 10 , the operations of theFTP server 31 is provided. Instep 209, theprocessor 65 determines whether a file request packet as illustrated inFIG. 7 (f) has been received from a mobile terminal. If no file request packet is received, theprocessor 65 returns to step 209. If, however, a file request packet is received, theprocessor 65 proceeds to step 210 where theprocessor 65 of theFTP server 31 transmits aFile Packet 134 as illustrated inFIG. 7 (g) to themobile terminal 36. In this manner, themobile terminal 36 is able to download the updated operating software. If multiple file request packets are sent by themobile terminal 36, theprocessor 65 will service each request during a repetition ofsteps FTP server 31, theFTP server 31 could be included within thehost computer 30 or thehost computer 30 could itself carry out all of the functions of theFTP server 31. - Referring now to
FIG. 11 , an aspect of the invention whereby a mobile terminal user may selectively download operating software from theFTP server 31 will be explained. Such aspect allows the mobile terminal user to input via the user input device 42 (FIG. 2 ) a selection of available packages of software which may be downloaded from theFTP server 31. The available software packages are displayed on thedisplay 46, and the user presses a key on theinput device 42 corresponding to the desired package. Themobile terminal 36 and theFTP server 31 are programmed to exchange the appropriate files and file information automatically as described below. - More specifically, beginning in
step 250 theprocessor 40 of themobile terminal 36 is programmed to determine if the user inputs a request for available software. Such a request can be a predefined selection of one or more keys on theuser input device 42. Until such time as the user inputs such a request, theprocessor 64 continues to loop throughstep 250. Upon receiving such a request as determined instep 250, theprocessor 40 proceeds to step 252 in which theprocessor 40 transmits a request packet to thehost computer 30 requesting that thehost computer 30 transmit a list of the package names corresponding to the package definition files stored in thememory 66. In response to the request packet thehost computer processor 64 is programmed to generate a list of the package names (e.g., Package A, Package B, etc.) and transmit the list to themobile terminal 36. - Following
step 252, theprocessor 40 determines instep 254 whether the list of package names has been received from thehost computer 30 within a predetermined time (e.g., five seconds). If not, theprocessor 40 returns to step 252 and retransmits the request packet. Otherwise, upon receiving the list of package names as determined instep 254, theprocessor 40 proceeds to step 256 in which it displays on thedisplay 46 the list of package names received from thehost computer 30. In addition, theprocessor 40 prompts the user via thedisplay 46 to select the desired package name. Such selection may be made by the user by pressing keys on theinput device 42 identified on the display as corresponding to the respective possible selections, for example, or alternatively cursor keys and other input techniques could also be used. - Upon receiving the user selection in
step 256, theprocessor 40 proceeds to step 258 in which theprocessor 40 forms and transmits to the host computer 30 aVersion Response Packet 124 of the same format represented inFIG. 7 (d). Included in thepackage name field 126 is the package name selected by the user instep 256. Thehost computer processor 64 is set up to receive theVersion Response Packet 124 and transmit in response aFile Name Packet 128 of the same format represented inFIG. 7 (e). In particular, when an unsolicited version response packet is received by thehost computer 30, theprocessor 64 includes in thecomparison result field 133 of theFile Name Packet 128 the contents of the package definition file as shown inFIGS. 5 a-5 d. Instep 260, the mobileterminal processor 40 determines whether apackage definition packet 124 has been received within a predetermined response period (e.g., five seconds). If not, theprocessor 40 returns to step 258 in which theVersion Response Packet 124 is retransmitted to thehost computer 30. - On the other hand, if the
package definition packet 124 is received as determined instep 260, theprocessor 40 proceeds to step 262 in which it downloads the files corresponding to the selected package name. Specifically, instep 262 themobile terminal 36 and theFTP server 31 exchangeFile Request Packets 130 and FilePackets 134 in the same manner as is described above in relation toFIGS. 8, 9 and 10. As a result, the files corresponding to the package name selected by the user are downloaded to themobile terminal 36. Thus, the present invention provides considerable user flexibility in determining software to be downloaded. - Referring now to
FIG. 12 , a wide area network (WAN) 295 is shown in accordance with another aspect of the invention. TheWAN 295 in the exemplary embodiment includes a plurality of local area network (LAN)communication systems 20 of the type shown inFIG. 1 , the respective systems being identified as 20A and 20B inFIG. 11 . TheWAN 295 includes a WAN basedsystem backbone 296 to which thehost computer 30 in each of thesystems system backbone 296 may be any conventional internet connection, whether hardwired and/or wireless. Also connected to thesystem backbone 296 is aWAN host computer 297 for carrying out host computer activities on theWAN 295 and aWAN FTP server 298 for carrying out FTP server activities on theWAN 295. - By virtue of the
WAN host computer 297 andWAN FTP server 298 being linked to thehost computers 30 andFTP server 31 in each of thesystems WAN host computer 297 can broadcast to eachhost computer 30, via thesystem backbone 296, an updated Package Definition table (FIG. 5 ) and theWAN FTP server 298 can broadcast the updated mobile terminal operating software relating to the Package Definition table. Thehost computer 30 in eachsystem mobile terminals 36 in therespective systems host computer 30 and the software itself will be available in theFTP server 31. Consequently, entire networks can be updated quickly and uniformly. It will be appreciated, that while theWAN 295 is shown to include theWAN FTP server 298, theWAN FTP server 298 could be included in theWAN host computer 297 or the WAN host computer could be configured to perform the functions of theWAN FTP server 298. In such a case, theWAN host computer 297 would communicate with thehost computers 30 in the respective systems and, if there was alsoFTP servers 31 in the systems, theWAN host computer 297 would also communicate the appropriate information thereto. - Although certain preferred embodiments have been described above, it will be appreciated that alterations, modifications, and equivalents thereto are deemed part of the invention. For example, the present embodiment has been described with respect to the
host computer 30 comparing the version of operating software it currently has stored within its memory with the version of software stored in themobile terminal 36, and if themobile terminal 36 has a different version of operating software stored within, thehost computer 30 requests themobile terminal 36 to download an upgraded version of the operating software from theFTP server 31. However, it will be appreciated that themobile terminal 36 can make the comparison of the operating software within to that stored in thehost computer 30 orFTP server 31 based on version information provided by thehost computer 30 in the Bootp Response packet, for example. If themobile terminal 36 determines thehost computer 30 and/orFTP server 31 has a different version of operating software than themobile terminal 36, themobile terminal 36 can make the determination to upgrade the operating software of the and transmit to a File Request packet to theFTP server 31 to receive an upgraded version of the software. - With respect to
FIGS. 7-10 above, thehost computer 30 is shown to initiate a software upgrade at some point following the mobile terminal boot-up routine. In an alternative embodiment of the present invention described below, however, it will be appreciated that the mobile terminal may initiate the software upgrade by communicating with the host computer at any time during or after the mobile terminal boot-up routine. Further, in the alternative embodiment described below, the operating software is said to be stored in thehost computer 30. However, it will be appreciated that the operating software could be stored in theFTP server 31 as discussed above. - Referring initially to
FIG. 13 a-13 d, the package definition files for the present embodiment are depicted. The package definition files are stored in the memory 66 (FIG. 3 a) of thehost computer 30.FIG. 13 a illustrates generally the various information fields included in each package definition file, whereasFIGS. 13 b-13 d provide illustrative examples of different package definition files. Each of the fields of the package definition file shown inFIGS. 13 a-13 d are substantially similar to that described above with respect to the package definition file shown inFIGS. 5 a-5 d except with respect to the path in memory as to where each file is stored. Accordingly, discussion related to the similar fields are not again provided for sake of brevity. With respect to the path information, in the present embodiment each of the operating software files are stored in thehost computer memory 66 and not theFTP server memory 67 as discussed in the previous embodiment. Thus, as shown inFIGS. 13 a-13 d, the path field of each package definition file includes the host computer path (e.g., the directory path) indicating where in thehost computer memory 66 the respective files are stored. This is represented by the “Host Path” field shown inFIG. 13 a. - FIGS. 14(a) through 14(h) schematically represent the exchange of information between a
mobile terminal 36 and thehost computer 30 in accordance with an alternative embodiment of the invention. It will be appreciated that, with respect to communications between themobile terminal 36 and thehost computer 30, thebase station 26 to which themobile terminal 36 is registered serves as an interface between themobile terminal 36 and thehost computer 30 as is well known in the art. As represented inFIG. 14 (a), when themobile terminal 36 undergoes its boot-up initialization routine themobile terminal 36 transmits aBootp Request packet 300 to thehost computer 30. TheBootp Request packet 300 is a packet which includes a header field 302 (e.g., synchronization bits, etc., as is conventional), ahardware address field 303 which holds the hardware address of themobile terminal 36, and aboot request field 304 which contains information requesting that thehost computer 30 furnish information relating to the boot-up procedures of themobile terminal 36. TheBootp Request packet 300 is generated by theprocessor 40 within themobile terminal 36. - As is represented in
FIG. 14 (b), thehost computer 30 receives theBootp Request packet 300 and, in response, theprocessor 64 generates and transmits aBootp Response packet 310 back to themobile terminal 36. TheBootp Response packet 310 includes aheader 311; anIP address field 312 containing the IP address of themobile terminal 36; apackage name field 313 containing the name of the package of operating software associated with themobile terminal 36; and a bootresponse information field 314 containing other conventional information which may be associated with the boot-up procedures of themobile terminal 36. - More specifically, when the
host computer 30 receives theBootp Request packet 300 from themobile terminal 36, theprocessor 64 performs a look-up in the bootptab table stored in thememory 66 based on the hardware address contained in thehardware address field 303. Specifically, theprocessor 64 looks up the entry in the bootptab table having the same hardware address. Theprocessor 64 then takes the corresponding IP address and package name from the bootptab table and includes them in theIP address field 312 andpackage name field 313, respectively, of theBootp Response packet 310 which is transmitted to themobile terminal 36. - Upon receiving the
Bootp Response Packet 310, themobile terminal 36 as represented inFIG. 14 (c) transmits aPackage Request Packet 318 to thehost computer 30. ThePackage Request Packet 318 includes aheader field 320; apackage name field 321; and a packagerequest information field 322 for any other conventional information which is utilized in a given system. Notably, thepackage name field 321 includes the package name previously received in theBootp Response Packet 310 as represented inFIG. 14 (b). The mobileterminal processor 40 temporarily stores the package name received infield 313 and generates thePackage Request Packet 318 with the package name included infield 321. The purpose of thePackage Request Packet 318 is to prompt thehost computer 30 to transmit back to the mobile terminal 36 a Package Definition Packet which includes the contents of the package definition file (FIG. 13 a-13 d) for the particular package name. More particularly, upon receiving thePackage Request Packet 318 thehost computer processor 64 takes the package name included in thepackage name field 321 and uses the package name to access the corresponding package definition file stored in thememory 66. - Specifically, the
processor 64 forms aPackage Definition Packet 324 as represented inFIG. 14 (d). Thepacket 324 includes aheader 325 and apackage definition field 326. Thepacket definition field 326 includes all of the information in the package definition file for the particular package name identified in thefield 321. In particular, thepackage definition field 326 includes the version identifier and the list of file names together with the previously described information relating to the required memory, file transfer mode, memory paths, file types, etc. Thehost computer 30 then transmits thePackage Definition Packet 324 to themobile terminal 36 as represented inFIG. 14 (d). - Upon receiving the
Package Definition Packet 324, the mobileterminal processor 40 initially compares the version identifier included in thepackage definition field 326 with the version identifier previously stored by theprocessor 40 the last time the mobile terminal downloaded files from thehost computer 30. If the versions are identical, then themobile terminal 36 concludes that no upgrades or revisions have been performed to the files included in the respective package. If the versions are different, then the mobile terminal 36 stores the information from thePackage Definition Packet 324 and then begins the process of sequentially stepping through each file name listed in the package definition file in thepackage definition field 326 and transmitting a request that thehost computer 30 transfer the actual file so that it may be downloaded and stored in themobile terminal 36. For example,FIG. 14 (e) illustrates afile request packet 330 which is generated by the mobileterminal processor 40 and which includes aheader 331 and afile request field 332. Thefile request field 332 includes the name of the next file which the mobile terminal 36 requests to be downloaded from thehost computer 30 to themobile terminal 36. Depending on the particular file transfer protocol utilized within the system, thefile request field 332 may also have such information as the location at which the particular file is stored in thehost computer 30, etc., as obtained from the package definition table 326. However, it will be appreciated that the actual file transfer protocol utilized in accordance with the present invention can be any well known transfer protocol and is not limited to any particular one. - The
mobile terminal 36 transmits thefile request packet 330 to thehost computer 30 as represented inFIG. 14 (e), and in response thehost computer 30 forms afile packet 334 which is transmitted back to themobile terminal 36. Thefile packet 334 includes aheader 335 and afile field 336. Thefile field 336 includes the contents of the file named in thefile request field 332. Consequently, the file is downloaded to themobile terminal 36 where it is stored for use in the operations of the mobile terminal. Next, themobile terminal 36 generates and transmits anotherfile request packet 330 requesting that the next file included in the list of file names in thepackage definition field 326 be downloaded to themobile terminal 36. Similarly, thehost computer 30 responds by transmitting anotherfile packet 334 including the contents of the file named in thefile request field 332. Such sequential exchange of file requests and the transfer of files between themobile terminal 36 and thehost computer 30 continues as represented in FIGS. 14(g)-14(h) until the mobile terminal has requested and received each of the files named in the package definition file received in thepackage definition field 326. - Accordingly, it will be appreciated that files from the
host computer 30 will not be downloaded to amobile terminal 36 until and unless it has been determined that a new version of mobile terminal operating software exists in thehost computer 30. In the event it is determined that a new version exists, every file identified in the package definition file for the corresponding package name is downloaded regardless of whether only one file or more than one file has been changed, added and/or deleted in the package. -
FIGS. 15 a and 15 b illustrate the basic operation of themobile terminal 36 in accordance with the alternative embodiment described above with respect to FIGS. 14(a)-14(h). Beginning instep 350, theprocessor 40 within themobile terminal 36 initiates its own internal boot-up routine upon being powered up and/or reset as is conventional. Next, instep 352 theprocessor 40 generates and transmits aBootp Request Packet 300 to thehost computer 30 as represented inFIG. 14 (a). Followingstep 352, theprocessor 40 determines instep 354 whether aBootp Response Packet 310 is received back from thehost computer 30 within a predetermined response period (e.g., five seconds). If not, theprocessor 40 returns to step 352 and retransmits theBootp Request Packet 300. If theBootp Response packet 310 is received by theprocessor 40 instep 354 as illustrated inFIG. 14 (b), theprocessor 40 proceeds to step 356 in which it transmits thePackage Request Packet 318 to thehost computer 30 as represented inFIG. 14 (c). Followingstep 356, the processor determines instep 358 whether aPackage Definition Packet 324 has been received from thehost computer 30 in response to thePackage Request Packet 318 within a predetermined response period (e.g., five seconds). If not, theprocessor 40 returns to step 356 and retransmits thePackage Request Packet 318. - Upon determining that a
Package Definition Packet 324 has been received in step 358 (as represented inFIG. 14 (d)), theprocessor 40 instep 360 compares the version indicator included in the Package Definition Packet 14(d) with the version indicator theprocessor 40 previously stored in thememory 50 the last time the mobile terminal operating software was downloaded. If, based on such comparison, theprocessor 40 determines that the versions are the same, theprocessor 40 proceeds to step 362 in which it is concluded that themobile terminal 36 will operate on the existing mobile terminal operating software stored therein since there have been no changes to the operating software. Instep 362, themobile terminal 36 completes any other conventional boot-up procedures. - In the event the
processor 40 determines instep 360 that thehost computer 30 has a new version of the operating software based on a difference between the version indicators, theprocessor 40 continues to step 364 in which it stores in the memory 50 (FIG. 2 ) the contents of thepackage definition field 326. Theprocessor 40 then proceeds to step 366 in which it transmits afile request packet 330 as represented inFIG. 14 (e) in order to request that the first file named in the package definition file included in thepackage definition field 326 be transferred from thehost computer 30 to themobile terminal 36. Next, instep 368 theprocessor 40 determines if acorresponding file packet 334 containing the requested file is received back from thehost computer 30 within a predetermined response period (e.g., five seconds). If not, theprocessor 40 proceeds to step 370 in which it retransmits the same file request previously transmitted instep 366. Theprocessor 40 then returns to step 368 as shown. - If the
file packet 334 is received by theprocessor 40 as determined instep 368 and as represented inFIG. 14 (f), theprocessor 40 proceeds to step 372. Instep 372 theprocessor 40 stores the file contained in thefile field 336 in the mobileterminal memory 50 according to the appropriate mode (e.g., replace or fail safe) and in the location specified by the information previously obtained in thepackage definition field 326. Thereafter, theprocessor 40 proceeds to step 374 in which it determines if there are more files to be downloaded from thehost computer 30. Specifically, theprocessor 40 determines whether there exists any more files in the list of file names provided in thepackage definition field 326 which have not yet been downloaded. If additional files exist, theprocessor 40 proceeds fromstep 374 back to step 366 in which theprocessor 40 transmits afile request packet 330 requesting that the next file in the list be downloaded (e.g.,FIG. 14 (g)). In the event the last file has already been transferred as determined instep 374, the downloading of the new version of the operating software is complete. Hence, theprocessor 40 proceeds fromstep 374 to step 362 mentioned above. - Regarding
steps processor 40 preferably is programmed to retransmit a respective packet only a predetermined number of times (e.g., five), and to terminate the routine in the event a response still is not received. This avoids the mobile terminal becoming hung up due to a system failure. In such case, theprocessor 40 allows themobile terminal 36 to continue to operate with the existing version of software stored therein. - Referring briefly to
FIG. 16 , the operation of thehost computer 30 is illustrated during the boot-up routine of themobile terminal 36. Beginning instep 400, thehost computer processor 64 determines if aBootp Request Packet 300 has been received from amobile terminal 36 as represented inFIG. 14 (a). If not, theprocessor 64 continues to loop throughstep 400. If aBootp Request Packet 300 is received, theprocessor 64 proceeds to step 402 in which theprocessor 64 transmits aBootp Response Packet 310 in response as represented inFIG. 14 (b). Next, instep 404 theprocessor 64 determines if thehost computer 30 receives aPackage Request Packet 318 within a predetermined period of time (e.g., five seconds). If not, theprocessor 64 returns to step 400. Otherwise, upon receiving the Package Request Packet 318 (as represented inFIG. 14 (c)), theprocessor 64 proceeds fromstep 404 to step 406. Instep 406 theprocessor 64 transmits back to themobile terminal 36 thepackage definition packet 324 corresponding to the package name included in thePackage Request Packet 318 as represented inFIG. 14 (d). - Following
step 406, theprocessor 64 determines instep 408 whether afile request packet 330 is subsequently received from themobile terminal 36 within a predetermined period of time (e.g., five seconds). If not, theprocessor 64 returns to step 400. If afile request packet 330 is received as represented inFIG. 14 (e), theprocessor 64 proceeds to step 410 in which theprocessor 64 transmits the requested file to themobile terminal 36 in a file packet 334 (FIG. 14 (f)). Followingstep 410, theprocessor 64 returns to step 408 to await a file request for another file. In this manner, thehost computer 30 and amobile terminal 36 requiring a new version of operating software will exchangefile request packets 330 and filepackets 334 until all of the files have been downloaded to themobile terminal 36. - Those having ordinary skill in the art will appreciate that
steps FIG. 16 can be carried out by a Bootp server (not shown) included in thehost computer 30. Steps 404-410 may be carried out separately by an FTP server (not shown) which also is included in thehost computer 30. - Although the invention has been shown and described with respect to certain preferred embodiments, it is obvious that equivalents and modifications will occur to others skilled in the art upon the reading and understanding of the specification. For example, the alternative embodiment has been described with respect to the
mobile terminal 36 comparing the version of operating software it currently has stored within its memory with the version of software stored in thehost computer 30; and if themobile terminal 36 has a different version of operating software stored within, it issues a request to thehost computer 30 to transmit to the mobile terminal 36 an upgraded version of the operating software. However, it will be appreciated that thehost computer 30 can make the comparison of the operating software within to that stored in themobile terminal 36 based on version information provided by themobile terminal 36 to thehost computer 30 in the Bootp Request packet, for example. If thehost computer 30 determines themobile terminal 36 has a different version of operating software than thehost computer 30, thehost computer 30 can make the determination to upgrade the operating software of themobile terminal 36 and transmit to the mobile terminal 36 an upgraded version of the software. - Furthermore, the file transfer protocol utilized in any of the embodiments of the present invention for transferring files between the mobile terminal and the host computer is not limited to any particular file transfer protocol. Any of a variety of known protocols such as TASP, FTP and TFTP can be used without departing from the scope of the invention.
- The present invention includes all such equivalents and modifications, and is limited only by the scope of the following claims.
Claims (13)
1. In a wireless communication system, a method of operation comprising the steps of:
storing a version of operating software that provides instruction code in at least one mobile device; the operating software, when executed, allowing the at least one mobile device to carry out its intended function;
wirelessly updating the operating software stored in the at least one mobile device if it is determined that the operating software stored in the at least one mobile device is not the current version.
2. The method of claim 1 , wherein the step of determining includes the steps of:
a host computer requesting from the at least one mobile device indicia indicative of a version of mobile device operating software stored in the at least one mobile device;
the at least one mobile device transmitting the indicia indicative of the version of mobile device operating software stored in the at least one mobile device to the host computer;
the host computer receiving the indicia indicative of the version of mobile device operating software stored in the at least one mobile device; and
the host computer determining whether updating of the mobile device operating software is appropriate based on an initial comparison in which the indicia indicative of mobile device operating software stored in the at least one mobile device is compared to an indicia of the current version of mobile device operating software.
3. The method of claim 2 , wherein the step of the host computer requesting from the at least one mobile device indicia indicative of a version of mobile device operating software occurs following completion of a boot-up routine during which the at least one mobile device establishes an identity in the wireless communication system.
4. The method of claim 1 , wherein the step of determining includes the steps of:
the at least one mobile device transmitting to a host computer a request to receive indicia indicative of the current version of mobile device operating software;
the host computer transmitting the indicia indicative of the current version to the at least one mobile device;
the at least one mobile device receiving the indicia indicative of the current version; and
the at least one mobile device determining whether updating of the mobile device operating software is appropriate based on an initial comparison in which the indicia indicative of current version of operating software is compared to an indicia of a version of the operating software stored in the at least one mobile device.
5. The method of claim 1 , wherein the step of wirelessly updating the operating software stored in the at least one mobile device includes the step of the at least one mobile device downloading the current version of the operating software from an FTP server.
6. A wireless communication system, comprising at least one mobile device having a mobile device transceiver for communicating wirelessly with a host computer and FTP server on a system backbone via a at least one base station; wherein a version of operating software that provides instruction code is stored in the at least one mobile device and, when executed, allows the at least one mobile device to carry out its intended function; and
7. The system of claim 6 , wherein the initial comparison includes a comparison of an indicia of a version of mobile device operating software stored in a host computer and an indicia of a version of mobile device operating software presently stored in the mobile device.
8. The system of claim 7 , wherein the initial comparison is carried out by the host computer based on indicia information provided by the mobile device.
9. The system of claim 8 , wherein the indicia information provided by the mobile device is provided in response to a request by the host computer for such indicia information.
10. The system of claim 7 , wherein in the event the version of mobile device operating software stored in the mobile device is different from the version of mobile device operating software stored in the host computer, the host computer request the mobile device to download updated operating software from a FTP server.
11. The system of claim 10 , wherein the mobile device replaces the mobile device operating software presently stored therein with the mobile device operating software provided from the FTP server.
12. A wide area network (WAN), comprising:
a WAN based system backbone having a plurality of wireless communication systems as recited in claim 6 coupled thereto;
a WAN based host computer coupled to the respective host computers in the plurality of wireless communication systems via the WAN based system backbone; and
a WAN based FTP server coupled to respective FTP servers in the plurality of wireless communication systems via the WAN based system backbone;
wherein the WAN based FTP server is operatively configured to communicate updated mobile device operating software to the respective FTP servers via the WAN based system backbone and the WAN based host computer is operatively configured to communicate updated information related to the mobile device operating software to the respective host computers via the WAN based system backbone.
13. In a wireless communication system, a method of operation comprising the steps of:
storing a version of operating software which provides instruction code in at least one mobile device;
executing the operating software, whereby the least one mobile device carries out its intended function;
determining whether the version of operating software stored in the at least one mobile device is a current version of the operating software; and
wirelessly updating the operating software stored in the at least one mobile device if it is determined that the operating software stored in the at least one mobile device is not the current version.
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US6968184B2 (en) | 2005-11-22 |
US6643506B1 (en) | 2003-11-04 |
US20040038675A1 (en) | 2004-02-26 |
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