WO1998011707A1 - An integrated local communication system - Google Patents
An integrated local communication system Download PDFInfo
- Publication number
- WO1998011707A1 WO1998011707A1 PCT/SE1997/001493 SE9701493W WO9811707A1 WO 1998011707 A1 WO1998011707 A1 WO 1998011707A1 SE 9701493 W SE9701493 W SE 9701493W WO 9811707 A1 WO9811707 A1 WO 9811707A1
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- WO
- WIPO (PCT)
- Prior art keywords
- local
- transceiver
- wireless headset
- locally
- demodulator
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
- H04M1/6058—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone
- H04M1/6066—Portable telephones adapted for handsfree use involving the use of a headset accessory device connected to the portable telephone including a wireless connection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
- H04M1/72409—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories
- H04M1/72412—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality by interfacing with external accessories using two-way short-range wireless interfaces
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2250/00—Details of telephonic subscriber devices
- H04M2250/02—Details of telephonic subscriber devices including a Bluetooth interface
Definitions
- the present invention relates to communication systems and, more particularly, to an integrated local area communication system
- Private mobile service is typically provided through a private mobile telephony network that is implemented using a private cordless system standard such as the Cordless Telephone Standard 2 (CT-2).
- CT-2 Cordless Telephone Standard 2
- Private telephony systems may be provided as stand-alone networks or connected to a fixed telephony network
- Public mobile service is, on the other hand, generally provided through a cellular telecommunications network using one of the common cellular transmission standards such as the Advanced Mobile Phone Service (AMPS) System Standard, or the Global System for Mobile Communication (GSM) Standard
- AMPS Advanced Mobile Phone Service
- GSM Global System for Mobile Communication
- Cordless telephone communications systems that are connected to a public switching telephone system (PSTN) have been known for some time
- PSTN public switching telephone system
- RF radio frequency
- cordless telephones are convenient in that they allow telephone communication without the impaired-mobility imposed by a cord, they still require, like conventional corded telephones, usage of at least one hand to hold the portable unit for operating. Recent attempts that address the limitations of conventional cordless telephones have resulted in headset-like portable units that allow hands-free operation
- a module port having a module connector, that is capable of communicating with a microphone via wireless and wired means
- wireless headsets Another application for the use of wireless headsets is in the Small Office/Home Office (SOHO) environment
- SOHO Small Office/Home Office
- This application could, for example, operate in the 2 4 GHz to 2 5 GHz frequency range
- a problem associated with wireless communication is that of supplying power to portable devices Since they are portable, the devices must rely on batteries and in order to extend battery life while at the same time keeping batteries small and light weight, every effort must be taken to conserve power consumption
- a logical progression of these multi-faceted advances is towards increased inter-operability and modularized integration of multiple physical devices so as to enhance human operator convenience
- it would be an advantage to have a mobile station equipped with a modular unit that is capable of communicating with a cordless phone base station so that it can operate as an extension of the cordless phone to effectuate land line communication
- a wireless headset that is capable of communicating on a single protocol with both the mobile station and
- the present invention includes a local area communication system (LACS) comprising a plurality of locally-positioned communication devices including at least two wireless headsets, wherein any two locally-positioned communication devices are selectably operable to communicate with each other over a preselected communication medium, and further wherein one of which forms a portion of an external or non-local communications network
- LACS local area communication system
- Each of the locally-positioned communication devices is also provided with a corresponding local interface module wherein the local interface module is capable of two-way communication both receiving an incoming communication signal and transforming it into a local transport signal suitable for local transmission, and transforming a local transport signal into an outgoing communication signal for transmitting into the local area communication system in accordance with at least one preselected common protocol
- either the incoming communication signal or the local transport signal may be either analog or digital, suitably modulated according to known methods
- either of these signals may comprise voice, video, or data, or any combination thereof with voice and data capable of being transmitted over a common communication channel.
- the local interface module may be functionally and structurally integrated into the circuitry of the corresponding communication device.
- the local interface module may be a pluggable module adapted to be received in a module port formed in the corresponding communication device.
- the present invention includes at least one mobile station associated with a cellular mobile telecommunications network, at least one phone interfacing device (PID) associated with a public switching telephone network (PSTN), at least an electronic data terminal and at least one hands-free unit.
- the hands-free unit includes a voice activation mode which can be selected by the user When voice activation is selected, the user simply needs to speak loudly into the microphone of the hands-free unit thereby producing a large input signal to activate the hands-free unit
- the hands-free unit also includes voice recognition to allow the user to dial a telephone number by speaking the telephone number into the microphone, hereinafter referred to as voice dialing.
- the hands-free unit further includes a keypad and an alphanumeric display.
- the hands-free unit can posses any combination of voice activation, voice dialing, keypad, and alphanumeric display.
- an electronic data terminal may be a computer that is selectably connectable to a network, or a printer, or a pager or a telefax machine or a hand-held data organizer. Or, the electronic data terminal may simply be in a different aspect a phone answering machine.
- the computer may be a multimedia computer of the type having graphic, audio, video and data interfaces.
- the PID can be a radio- enhanced phone interfacing device or a conventional corded phone having a handset connected by wire means to the cradle unit.
- Each of these devices is coupled to a corresponding local interface module which comprises a transceiver that is capable of selectably effectuating a local communication link between the local interface module of which it is a part and any other local interface module.
- the radio-enhanced phone interfacing device may be a conventional cordless phone base unit coupled with a local interface module, or alternatively, a local interface module directly-connectable to the PSTN with enhanced functionality, referred to herein and hereby as a home base station
- the home base station may be, in one embodiment, be equipped with a set of key pads to facilitate call initiation
- the local interface module comprises an infra-red transceiver for selectably effectuating local communication links
- a Received Signal Strength Indicator is also incorporated into the wireless device.
- a LACS wherein there is further provided a mobile station that is selectably operable as a cordless phone handset to place or receive calls over the PSTN
- a wireless headset that is selectably operable either as a wireless extension to a mobile station or as a hands-free remote unit in connection with a radio-enhanced phone interfacing unit associated with the PSTN
- an electronic data terminal such as one described hereinabove
- two headsets preferably wireless, that can engage using a common protocol in a local communication link between themselves and with a locally-positioned communication device other than a headset
- variable power control to the transmitter determined by the received signal strength in an effort to conserve battery life The measured strength of the received signal alternatively being transmitted back to the sending transmitter to provide a feed-back loop for adjusting the sending
- FIGURE 1 is a block diagram of the broad network interconnection of an integrated local area communication system comprising a plurality of communication devices,
- FIGURE 2 is a block diagram of an integrated local communication system in accordance with a presently preferred exemplary embodiment of the present invention
- FIGURE 3 is a block diagram of the implementation of a local area communication system in accordance with an aspect of a presently preferred exemplary embodiment of the present invention
- FIGURE 4 illustrates a network interconnection of multiple Public Land Mobile Networks (PLMNs) to a Public Switching Telephone Network (PSTN),
- FIGURE 5 is a block diagram of a PLMN;
- FIGURE 6 is a block diagram of a conventional land-line telephone unit
- FIGURE 7 is a block diagram of a conventional cordless phone base unit
- FIGURE 8 illustrates a block diagram of a conventional wireless headset unit
- FIGURE 9A depicts a block diagram of a presently preferred embodiment of a local interface module adapted for use with a mobile station in accordance with the present invention
- FIGURE 9B is a block diagram of a presently preferred embodiment of a home base station or directly-connectable local interface module adapted for use with a PSTN in accordance with the present invention
- FIGURE 9C is a block diagram of a presently preferred embodiment of a local interface module adapted for use with a serial computer port connector in accordance with the present invention
- FIGURE 9D is a block diagram of a presently preferred embodiment of a local interface module adapted for use with an electronic data terminal in accordance with the present invention
- FIGURE 9E is a block diagram of a presently preferred embodiment of a local interface module adapted for use with a cordless phone base unit associated with a
- FIGURE 10 shows an exemplary decision tree that may be used in accordance with the present invention to selectably effectuate local wireless communication for incoming calls
- FIGURE 11 A and FIGURE 1 IB show an exemplary decision tree that may be used in accordance with the present invention to selectably effectuate local wireless communication for call initiation
- FIGURE 12 illustrates the local area communication system of FIGURE 2 and further including two additional wireless headsets;
- FIGURE 13 illustrates use of a received signal strength indicator for controlling transmitting power of a wireless headset transceiver, and
- FIGURE 14 illustrates a block diagram of a local interface module adopted for use with a wireless headset also containing an alphanumeric display for receiving data
- FIG 1 depicts the broad network interconnection of an integrated local area communication system (LACS) according to the present invention, generally denoted by reference numeral 100
- the local communication system 100 envisions seamless integration of a plurality of electronic communications devices, 110-1 through 1 10-N, at least one of which may be connected to an external communication network, shown herein by reference numerals 140-1 through 140-4
- the connections, 130-1 through 130-4, between the plurality of devices 110-1 through 110-4 and the external communications systems 140-1 through 140-4 may be wireless or wire-line, according to the present invention.
- each of the plurality of local interface modules 120-1 through 120-N is capable of effectuating wireless communication with the other N-l local interface modules
- the local communication can be voice, video and data, or any combination thereof
- the local communication is effectuated upon a single communication protocol involving a local medium which can be electromagnetic waves such as radio, infra-red, optic spectra or microwaves, or magnetic waves, or wire-line
- the local signal may be analog or digital, with any suitable modulation known in the art FIG.
- Reference numeral 210 refers to a radio-enhanced phone interfacing device, coupled to a public switching telephone network (PSTN) 260
- PSTN public switching telephone network
- the radio-enhanced phone interfacing device 210 can be simply a known cordless phone base unit capable of short-range wireless communication in a home or office environment
- reference numeral 240 refers to a known mobile station associated with a Public Land Mobile Network (PLMN) 270
- Reference numeral 230 refers to an electronic data terminal, as referenced and described hereinabove, that may be associated with a local area network (LAN) 280.
- LAN local area network
- the electronic data terminal 230 can be a computer that is selectably associated within a distributed computing environment Alternatively, it can also be a printer, or a telefax machine, or a pager, or a phone answering machine, or a hand-held data organizer. It is within the spirit of the present invention that these known variations and modifications of the electronic data terminal 230 are capable of being arranged in a local communication network in accordance with the present invention.
- reference numeral 220 refers to a wireless headset, provided in a presently preferred exemplary embodiment to maximize user convenience in effectuating a local communication path
- Reference numerals 250-1 through 250-4 refer to four local interface modules.
- the local interface module 250-1 is coupled to the radio-enhanced phone interfacing device 210
- the local interface module 250-2 is coupled to the wireless headset 220
- the local interface module 250-3 is coupled to the electronic data terminal 230
- the local interface module 250-4 is coupled to the mobile station 240. It will be appreciated by the persons of ordinary skill in the art that although the local interface modules 250-1 through 250-4 are shown as separate functional blocks, they are capable of being integrated structurally into their respective communication devices 210, 220, 230 and 240.
- radio-enhanced phone interfacing device 210 may be such that its associated local interface module 250-1 is functionally integrated into its native circuitry as well.
- the wireless headset 220 and the local interface module 250-2 can be, in one aspect of the invention, functionally integrated also.
- the local area communication system of FIG. 2 and further including two additional wireless headsets
- the two additional wireless headsets 1221 and 1222 are similar to the headset 220 of FIG. 2 and include the functional components described in FIG 8
- the local interface modules 1251 and 1252 are similar to the local interface module 250-2 of FIG 2 Communication between two or more headsets 220, 1221, and 1222 or communication between multiple headsets and any of the communications devices 210, 230 or 240 can be established over the local communication system
- Reference numeral 210 is the radio- enhanced phone interfacing device that is associated with the PSTN 260 for external land-line communication.
- Reference numeral 261 is the associative path between the PSTN 260 and the radio-enhanced phone interfacing device 210
- the communication signals on this path 261 may be analog or digital, and further, it may in a specific embodiment be a Tl phone line, or an Integrated Services Digital Network (ISDN) connection, or a high-capacity Asymmetric Digital Subscriber Line (ADSL).
- the radio-enhanced phone interfacing device 210 which is shown to have a local antenna 211 for local communication, may be a cordless phone base unit coupled with a corresponding local interface module (not shown) or a directly-connectable home base station.
- the mobile station 240 is associated with the PLMN 270 for cellular communication.
- the cellular path 271 may be effectuated between the mobile station 240 and the PLMN 270 using any one of the common cellular transmission standards such as the Advanced Mobile station Service (AMPS) System standard or the Global System for Mobile Communication (GSM) Standard.
- AMPS Advanced Mobile station Service
- GSM Global System for Mobile Communication
- the mobile station 240 is equipped with a non-local antenna 242 to facilitate transmission and reception of cellular communication signals between the mobile station 240 and a base station (not shown).
- the mobile station 240 is coupled to a local interface module 241 having a local antenna 243 for local communication
- the coupling between the mobile station 240 and the local interface module 241 is such that the non-local cellular communication signals over the cellular path 271 are selectably convertible to local communication signals, and vice versa, to be transmitted on a local communication link as will be discussed hereinbelow
- the wireless headset 220 is operable either as a wireless extension to the mobile station 240 via a first local radio communication link 310 or as a hands-free phone unit for communication over the PSTN 260 via a second local radio communication link 320
- a third local radio communication link 330 is selectably established between the mobile station 240 and the radio-enhanced phone interfacing device 210 whereby the mobile station 240 is selectably operable as a hands-on phone unit associated with the radio-enhanced phone interfacing device 210 to place a call over the PSTN 260
- reference numeral 410 generally illustrates a possible network interconnection of multiple PLMNs 270A, 270B to PSTN 260, according to an aspect of the presently preferred exemplary embodiment of the present invention
- a mobile subscriber (MS) 420 is associated with one of the PLMNs as its Home PLMN 270A within each PLMN 270A, 270B, there are multiple mobile switching centers (MSCs) 470A, 470B, servicing the geographical areas covered by the network
- the mobile subscriber 420 who is served by its Home PLMN 270A is capable of communicating with other wireless and wire-line terminals by connecting with the
- An access tandem (AT) 440 associated within the PSTN 260 routes the mobile calls generated from the PLMN 270A to wire-line terminals serviced by one of its exchanges within the PSTN 260, or to another PLMN 270B by way of its GMSC 430B If the mobile subscriber 420 travels outside the coverage area of its Home PLMN 270A and roams into the geographical area covered by an adjacent PLMN 270B, an interexchange handofF occurs between the Home PLMN 270A and the adjacent PLMN 270B whereby telecommunications service continues to be provided to the MS 420 from the adjacent PLMN 270B as a roaming subscriber
- FIG 5 is a block diagram of the PLMN 270 including the mobile switching center 470.
- the PLMN 270 comprises a Home Location Register (HLR)
- the mobile switching center 470 is also generally known in the an as a base station system, and includes a base-station controller 510 and one or more of base-station transceiver stations(BS) 520-1 through 520-L Each of the base-station transceiver stations is associated with a subgroup of the antenna systems 500-1 through
- an entry in the HLR 480 is made Whenever the MS 420 is switched on, and possibly at regular intervals thereafter, it will register with the PLMN 270 and give its location area
- the MSC 470 communicates directly with the HLR 480 and the VLR 490 for subscriber information and transfers calls from one BS to another as the MS 420 travels within the geographical area covered by the PLMN 270.
- the GMSC 430 acts as a gateway to allow access to other wire-line terminals associated with the PSTN 260 or wireless mobile subscribers associated with other PLMNs
- the establishment of a cellular call within and without the PLMN 270 is typically effectuated via Signaling System No 7 (SS7) network protocols utilizing network addresses
- SS7 Signaling System No 7
- FIG 6 a block diagram of a conventional landline telephone is shown generally at 610
- This telephone 610 consists of a cradle 635 and a handset 645
- the telephone 610 is connected to the PSTN 260 by a wire-line connection 615 which carry analog or digital telephone signals.
- the wire-line connection 615 can be substantially identical to the associative path 261 shown in FIG 3 and described hereinabove
- the cradle 635 includes Data Access Arrangement (DAA) section 620, key pad 625, and ringer circuit 630
- the handset 645 includes speaker 640 and microphone 650.
- the DAA 620 contains analog filters and other known protection devices required to connect to the PSTN 260
- the key pad 625 is used to provide the number to be called to the PSTN
- Ringer circuit 630 and known associated signaling means are provided to inform the user when there is an incoming call
- FIG 7 illustrates a block diagram of a conventional cordless phone base unit, generally shown at 710, which can be operable, for instance, at frequencies close to or within the 46 MHZ to 49 MHZ frequency range
- the cordless phone base unit 710 conceptually, is a subminiature cellular system providing at least a signaling channel which transmits outbound signals in a fashion similar to a conventional cellular outbound signaling channel, and receives service requests from a remote hand-held unit 715
- the base unit 710 has a local PSTN line interface 720, a remote unit interface
- a channel switch 740 selectively makes a channel between the local PSTN line interface 720 and the remote unit interface 730, and a channel between the tone signal source 750 and the remote unit interface 730 It is known in the art that the local PSTN line interface
- the remote unit interface 730 comprises a voice-band processing circuit (not shown), a mixer (not shown), a radio transceiver (not shown) coupled to the antenna 770.
- the controller 760 controls the local PSTN line interface 720, the channel switch 740, and the remote unit interface 730
- reference numeral 810 generally shows a block diagram of a wireless headset according to an aspect of the present invention
- An antenna 820 operable to receive and transmit local communication signals which may be effectuated using either standard wireless communication protocols or a proprietary protocol, is electrically connected to a radio transceiver 830
- the functionality of the radio transceiver 830 may be implemented in numerous known ways, with attendant electronic circuitry for tuning etc
- the signal output from the radio transceiver 830 is then fed into a baseband modulator/demodulator block 840 which either extracts the information signal from the local carrier radio wave or modulates the local carrier radio wave using the information signal
- the in-coming information signal is then fed into a speaker 880 via a driver/amplifier block 850
- the speaker 880 and the driver/amplifier block 850 in physical implementation, may take a variety of known forms
- the out-going information signal is generated by a microphone 870 which is amplified by the driver/amp
- FIG 9A is a block diagram of a presently preferred exemplary embodiment of a local interface module adapted for use with the mobile station 240 (not shown) that is associated with the PLMN 270 (not shown)
- FIG 9B is a block diagram of a presently preferred exemplary embodiment of a local interface module adapted as a directly-connectable home base station associated with the PSTN 260
- FIG 9C is a block diagram of a presently preferred exemplary embodiment of a local interface module adapted for use with a serial computer port connector
- FIG 9D is a block diagram of a presently preferred exemplary embodiment of a local interface module adapted for use with the electronic data terminal 230
- FIG 9E is a block diagram of a presently preferred exemplary embodiment of a local interface module adapted for use with the cordless phone base unit 210 associated with the PSTN 260 Referring now specifically to the local interface modules, 905-A to 905-E of
- the local interface modules are substantially identical to one another, and to a great extent, are similar to the wireless headset, shown in FIG 8
- the antenna 820 is operable to receive and transmit local communication signals which may be effectuated using either standard wireless communication protocols or a proprietary protocol, on a single local communication medium which can be an electro-magnetic wave, an infrared wave, a radio wave, a microwave, a magnetic wave, an optic wave or even a wireline connection
- the modulation and demodulation of the communication signal is achieved by the baseband modulator/demodulator 840 which is coupled to an interface circuitry block, 10- A through 910-E
- the interface circuitry block 910- A effectuates appropriate conversion of communication signals between the local interface module 905-A and a system connector 920 coupled to the mobile station 240(not shown)
- the interface circuitry block 910-B effectuates appropriate conversion of communication signals between the directly-
- the interface circuitry block 910-D effectuates appropriate conversion of communication signals between the local interface module 905-D and the electronic data terminal 935
- the interface circuitry block 910-E effectuates appropriate conversion of communication signals between the local interface module 905-E and the cordless phone base unit 210 that is associated with the PSTN 260
- each of the local interface modules 905-A to 905-E may preferably be disposed within the housing of the communication device (not shown) with which it is to interface Alternatively, the local interface module may also be disposed in a separate housing such that it forms a pluggable unit to be received in a module port in the communication device
- the controller module 860 in FIGS 9A to 9E is substantially similar to the controller module 860 in FIG 8
- FIGS 10, 11 A and 1 IB show two flowcharts illustrating an exemplary decision tree that may be used according to the teachings of the present invention in order to effectuate local wireless communication among at least a radio-enhanced phone interface device, a mobile station and a wireless headset Since maximization of user convenience and flexibility is a desired object of the present invention, different decision trees may be employed to suit different conditions of operation.
- FIG. 10 therein is shown a flowchart for selectably effectuating local wireless communication links for call reception. Steps
- 1005 and 1020 are decision blocks to determine if the incoming call is a PSTN call or if it is a cellular call over the PLMN. If the call is a PSTN call, then the user needs to determine if the mobile station or the headset is to be used to function as the call terminating device. This step is provided in the decision block 1010.
- the user takes the MS path 101 1 Upon making that determination, the user can selectably establish a wireless local communication link between the mobile station and the radio-enhanced phone interface device as shown at 1015
- the user takes the Headset path 1013 to selectably establish in step 1017 a local wireless communication link between the wireless headset and the radio-enhanced phone interface device. Further, if the wireless headset is out of range, or if the user does not desire to use the wireless headset, then the user may proceed as in step 1016 to receive the PSTN call by using the conventional wireless, or corded, handset by taking the path shown at 1012.
- the user has a choice of using the mobile station in a conventional manner to receive that call, shown in step 1035, or establish a wireless local communication link between the mobile station and the wireless headset, provided they are within a suitable range from each other, as shown in step 1040.
- FIGS 11 A and 1 IB therein is shown an exemplary decision tree for initiating a call according to the teachings of an aspect of the present invention
- Decision blocks 1 105 and 1 125 are employed to determine whether the outgoing call is to be transmitted over the PLMN or the PSTN If the outgoing call is a PSTN call, the user takes the YES path shown at 1 104 After this step, the user has the choice of call initiation by using a wireless headset with keypads, by voice activation and voice dialing, or by using a mobile station as shown in the decision block 1110 If the user desires to use the mobile station and if the mobile station is within the local range of the radio-enhanced phone interface device, the user may by taking the MS path 1113 selectably establish the local communication link between the mobile station and the radio-enhanced phone interface device as shown in 1 121 If the user desires, on the other hand, to use the headset by taking the Headset path 111 1, subsequent steps of the decision tree are dependent on whether the wireless headset is equipped with its own key pad necessary for remote operation This condition is tested in the decision block 1115 If the determination is NO, the user takes the path 1116 to initiate the PSTN call using the key pads
- the strength of the received signal provides an approximation of the signal strength necessary for the wireless headsets 810A and 81 OB to maintain a clean close to error free connection
- a strong signal tends to indicate that the wireless headsets are in close proximity to each other and/or that conditions for remote communications are favorable.
- the transceivers need to increase transmit output power to overcome adverse conditions or a greater distance between the two transceivers.
- the strength of the signal received from the wireless headset 810A can be used to control the output power of transceiver 830B and can also be transmitted back to wireless headset 810A to adjust the output power of transceiver 830A Likewise, as the signal transmitted from the wireless headset
- the received signal strength indicator BOOB measures the strength of the received signal
- the strength of the signal received from the wireless head set 81 OB can be used to control the output power of transceiver 830A and can also be transmitted back to wireless headset 810B to adjust the output power of transceiver 830B Therefore, the output power of each transceiver 830A and 830B can be adjusted based on the strength of the signal transmitted by the other wireless headset as measured by the receiving transceiver, by the strength of the signal transmitted by its transceiver which is measured by the other wireless headset and transmitted back, pr by a user selected manual setting.
- transceiver output power can be reduced to the minimum level required to maintain a clean close to error free connection in order to conserve battery life or reduce the potential for interference with other wireless communications.
- the received strength indicators 1300 A and 1300B independently control the transmit output power over control lines 1310A and 1310B respectively.
- received signal strength indicators 1300 A and 1300B communicate the strength of the received signals to the controllers 860 A and 860B over signal line 1320A and 1320B Controllers 860A and 860B then control the transmit output power via control lines 1330A and 1330B respectively Controllers 860A and 860B can factor in other variables into the control process such as battery strength
- the controllers 860A and 860B can be manually directed to set a particular output power for example to maximize transmitter output power in situations where long range is desirable or minimize transmitter output power where only short range is necessary
- FIG 14 there is illustrated a block diagram of a local interface module adapted for use with a wireless headset also containing an alphanumeric display and a computer device for receiving, sending, displaying and manipulating data
- the local interface module 1405 is similar to module 810 of Fig 8 in that the module 1405 contains antenna 820, transceiver 830, baseband modulator/demodulator 840, driver/amplifier 850, and controller 860 with the driver/amplifier 850 connected to speaker 880, and microphone 870 Furthermore, the components operate as discussed in the description of Fig 8
- module 1405 By dividing the communication transmission into packets and employing a protocol which defines when a packet contains voice and when a packet contains data, module 1405 also possesses the capability to receive and transmit data over the same local communication signals as used for voice communication by the headset Module 1405 operates in three modes The first mode is used when data and no voice is communicated Conversely, the second mode is used when voice and no data is communicated Lastly, the third mode is used when a combination of voice
- the audio signals are received from, and sent to, the driver/amplifier 850 while the data signals are received from, and sent to, the interface 1410
- the interface block 1410 effectuates appropriate conversion of the data signals for displaying data on alphanumeric display 1420 and transmission to computer device 1430.
- the local communication paths may also comprise infra-red (IR) or microwave or magnetic wave links and the corresponding receivers/transmitters will be used in lieu of radio transceivers.
- IR infra-red
- microwave or magnetic wave links may also comprise infra-red (IR) or microwave or magnetic wave links and the corresponding receivers/transmitters will be used in lieu of radio transceivers.
- radio transceiver comprises appropriate radio control logic of the type necessary to constitute a radio device that is capable of communicating using a wireless communication standard such as DAMPS, GSM, DECT etc
- the transceiver may include, in addition to a transmitter and receiver, data modem circuitry, when the communications device is used for data transmission
- both local and non-local (that is, disposed between the plurality of communications devices and their respective external communications networks) communications signals may be analog or digital, and may comprise voice, video and data.
- LACS local area communication system
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR9711736A BR9711736A (en) | 1996-09-11 | 1997-09-05 | Circuit layout and process for making a communication link between a first locally positioned communication device and a second locally located communication device |
EP97942329A EP0925678A1 (en) | 1996-09-11 | 1997-09-05 | An integrated local communication system |
AU44051/97A AU719471B2 (en) | 1996-09-11 | 1997-09-05 | A circuit assembly for effectuating communication between a first and a second locally-positioned communication device |
EEP199900120A EE9900120A (en) | 1996-09-11 | 1997-09-05 | Integrated local communication system |
JP51355298A JP2001513951A (en) | 1997-09-05 | 1997-09-05 | Integrated local communication system |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/712,570 | 1996-09-11 | ||
US08/712,570 US5983100A (en) | 1996-03-14 | 1996-09-11 | Circuit assembly for effectuating communication between a first and a second locally-positioned communication device |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998011707A1 true WO1998011707A1 (en) | 1998-03-19 |
Family
ID=24862682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1997/001493 WO1998011707A1 (en) | 1996-09-11 | 1997-09-05 | An integrated local communication system |
Country Status (8)
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---|---|
US (1) | US5983100A (en) |
EP (1) | EP0925678A1 (en) |
KR (1) | KR100503218B1 (en) |
CN (1) | CN1150741C (en) |
AU (1) | AU719471B2 (en) |
BR (1) | BR9711736A (en) |
EE (1) | EE9900120A (en) |
WO (1) | WO1998011707A1 (en) |
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Also Published As
Publication number | Publication date |
---|---|
US5983100A (en) | 1999-11-09 |
AU4405197A (en) | 1998-04-02 |
AU719471B2 (en) | 2000-05-11 |
BR9711736A (en) | 1999-08-24 |
KR100503218B1 (en) | 2005-07-25 |
CN1237302A (en) | 1999-12-01 |
CN1150741C (en) | 2004-05-19 |
EE9900120A (en) | 1999-10-15 |
KR20000036034A (en) | 2000-06-26 |
EP0925678A1 (en) | 1999-06-30 |
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