WO1999011081A2 - An apparatus and method for peer-to-peer link monitoring of a wireless network with centralized control - Google Patents
An apparatus and method for peer-to-peer link monitoring of a wireless network with centralized control Download PDFInfo
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- WO1999011081A2 WO1999011081A2 PCT/IB1998/001141 IB9801141W WO9911081A2 WO 1999011081 A2 WO1999011081 A2 WO 1999011081A2 IB 9801141 W IB9801141 W IB 9801141W WO 9911081 A2 WO9911081 A2 WO 9911081A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/08—Trunked mobile radio systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
- H04W84/20—Master-slave selection or change arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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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
- H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
Definitions
- This invention relates to the monitoring of peer to peer links in a wireless network and in particular to the determination of an optimal network structure in dependence upon the monitored quality of these links.
- the invention is particularly well suited for wireless systems having a centralized control station, and is further well suited for wireless ATM (Asynchronous Transfer Mode) networks.
- a communications network requires a network protocol to operate effectively and efficiently.
- One such protocol for a wireless network is a contention-based protocol.
- a contention based protocol network any station is free to transmit whenever another station is not currently transmitting.
- Such a protocol exhibits inefficiencies due to collisions, wherein two transmitters attempt to initiate transmission at the same time.
- the likelihood of collisions increase with an increase in network traffic, making contention based protocols inefficient for high traffic networks. Because collisions may occur, and will be undetectable by each of the transmitters, the contention-based protocol typically requires an acknowledgment from the intended receiver to the transmitter, further limiting the network's efficiency, and further increasing the likelihood of collisions.
- An alternative to a contention-based protocol is a centralized control protocol, wherein one station in the network determines when each of the other stations may transmit. Each station transmits only during its allocated time, thereby eliminating the possibility of collisions, and thereby increasing the efficiency of the network.
- the communication of the information related to the control of the network incurs an overhead inefficiency, but this overhead is relatively independent of the quantity of communications on the network. Therefore, the centralized control protocol is particularly well suited for high traffic networks, or networks which require a deterministic quality of service (QoS), such as ATM.
- QoS quality of service
- An essential element to a centralized control protocol is that each station on the network must be able to communicate with the centralized controller.
- Wireless networks often support mobile stations, and the ability to communicate between the controller and the mobile station must be assured regardless of the location of mobile station.
- One architecture commonly utilized is a cellular network, wherein central controllers are placed throughout a region, each central controller having a local transmission area, or cell, within which communications with a station can be expected to be reliable. The central controllers are placed such that any point in the region lies within at least one cell.
- Such a cellular approach requires that the central controllers be stationary, and does not readily allow for a wireless communications network within which all stations may be mobile.
- the control structure should be reconfigurable, in dependence upon the changing environment. If communications within the current structure are poor, the structure should be changed to one, which provides for a higher quality of communications. To effect such a reconfigurable network, a means must be provided to assess the quality of the existing network structure, and also to estimate the quality of an alternative network structure.
- An object of this invention is to provide a method and apparatus for determining the quality of the communication paths within a network. It is a further object of this invention to utilize this quality determination to optimize the structure of the network. It is a further object of this invention to utilize this quality determination to establish optimized paths for retransmission links within the network.
- the quality of the communication paths within a network is determined by having each station within the network monitor and assess the quality of reception of transmissions from each of the other stations within the network. These individual quality assessments are forwarded, periodically or on demand, to a centralized controller. These assessments then form a matrix of quality assessments, from which the structure of the network can be optimized, by selecting, for example, the station having the overall best quality measure relative to each of the others. The network is thereafter reconfigured to replace the current, sub-optimal, centralized control station with the selected station.
- the matrix of quality assessments can also be utilized to identify problematic terminal-to-terminal links, and to institute retransmission relay paths to overcome the poor quality links.
- Figure 1 shows a wireless network, comprised of wireless terminals and a centralized controller.
- Figure 2 shows the control and user plane link constellations of a wireless network.
- Figure 3 shows a block diagram for a link monitor of a wireless terminal.
- Figure 4 shows a block diagram for a link monitor of a centralized controller.
- Figure 5 shows a link quality matrix for a wireless network.
- wireless networks described herein are presented in the context of wireless ATM (Asynchronous Transfer Mode) terminals, and protocols developed to efficiently manage the use of ATM for ad-hoc wireless communications networks. It will be evident to one skilled in the art that the techniques and methods presented herein are applicable to other network architectures and protocols, and are well within the spirit and scope of this invention.
- ATM Asynchronous Transfer Mode
- Figure 1 shows an ad hoc wireless ATM network 101.
- a network may be formed, for example, by people around a meeting table, with communicating devices (1-5) for exchanging documents or notes.
- communicating devices (1-5) for exchanging documents or notes.
- the network expands to include the new communications station; the network may also contract, as people leave the meeting or sign off the network.
- the network is termed ad hoc, because the formation and structure of the network is not fixed.
- one of the stations must perform the function of a centralized controller. That is, for example, the first station to be turned on will act as a centralized controller, and will transmit a beaconing signal.
- This beaconing signal would be part of a network protocol wherein, in response to a beacon, stations wishing to enter the network would respond in accordance with the aforementioned protocol.
- the portion of the protocol which addresses how the devices operate within the medium of the network is termed the Medium Access Control (MAC) level protocol.
- the ad hoc centralized controller utilizing the network MAC protocol, would then manage any subsequent transmission requests from each of the stations which it has admitted to the network. The management of transmission requests is accomplished by, for example, allocating specific time slots for each of the requesting transmitters.
- a Quality of Service (QoS) parameter is associated with the admission of a station into the network.
- the centralized controller is responsible for determining the QoS level which can be allocated to each station, and then allocating the time slots for transmission in accordance with this QoS. That is, for example, the centralized controller may grant a minimum bandwidth allocation QoS to a station; thereafter, on demand, the centralized controller must allocate a sufficient time slot to that station to satisfy the granted bandwidth allocation QoS.
- each station may transmit directly to any other station in the network.
- the MAC protocol will contain the necessary structure for effecting this station to station communication.
- each message from each station may contain the address(es) of the intended recipient(s).
- the allocation messages from the centralized controller could also contain the intended recipients for each of the allocated transmission slots, thereby allowing the wireless stations to enter a standby state between transmissions or receptions, thereby saving power.
- Communications within the network thus comprise controller-to-station or control communications, and station-to-station, or user communications.
- Figure 2a shows the communications within the network on the control and user communications planes.
- the centralized controller 8 must be able to communicate with each of the wireless terminals 1, 2, 3,4 and 5, along the control links 81, 82, 83, 84 and 85.
- Each of the wireless terminals 1, 2, 3, 4 and 5 must be able to communicate with each other terminal along user links 12, 13, 14, 15, 23, 24, 25, 34, 35 and 45 to transmit messages to each other. If a user link is inoperative, due to interference or the attenuation of the signal due to distance, messages cannot be passed between the affected stations.
- the centralized controller will not be able to receive a request for transmission allocation from the affected station, or the affected station will not receive notification of the allocation.
- the communications links in the control plane must be reliable, because without the control link, a station is, effectively, cut off from communication with every other station, even those with which a reliable user link exists.
- the quality of each communication link is continually assessed.
- the transmissions are broadcast, and are receivable by any station within some viable range of the transmitter.
- every other station on the network can assess the quality of reception of that transmission, even if the message is not intended to be received by each of these stations.
- a receiving station knows, via the MAC protocol, which station is transmitting during each allocated time slot, the receiving station can monitor the network during each time slot, and associate a received signal quality to the transmitting station allocated to that slot.
- station 1 of figure 2 can monitor the network during the time period allocated to station 2, and assess the quality of link 12.
- station 2 can monitor the network during the time period allocated to station 1, and also assess the quality of link 12.
- Each link being bi-directional, will have two quality factors associated with it; in each case the quality factor is the quality of the signal as received.
- Figure 2b shows each path of the link independently, wherein path 1-2 is the path from station 1 to station 2, and path 2-1 is the path from station 2 to station 1.
- the quality of path 1-2 is the quality of the signal transmitted by station 1, as received by station 2; and the quality of path 2-1 is the quality of the signal transmitted by station 2, as received by station 1.
- the same means of communication are utilized in both the control and user planes of communication, and therefore the quality assessment can be made in either plane, and will be applicable in either plane.
- station 2 can assess the quality of path 1- 2 by monitoring the user, station-to-station, communications of station 1 ; or, it can assess the quality of path 1-2 by monitoring the control, station-to-controller communications of station 1. If alternative means are utilized for control and user communications, quality assessments for each of these types of communication can also be maintained.
- the quality assessment by each station can be made by a number of techniques well known to those skilled in the art.
- the SNR Signal to Noise Ratio
- the strength of each received signal can be measured in a relative manner, for example by the magnitude of the feedback signal in an AGC (Automatic Gain Control) circuit, and the quality assessment could be an ordering of each transmitting station by the magnitude of this signal.
- AGC Automatic Gain Control
- a common quality measure for digital systems is an estimate of the likelihood of an erroneous bit value being received, a bit error.
- Most communications protocols include an error detection means, and, the detection of an error can be used for an assessment of a bit error rate associated with the path.
- parity bits are employed to verify the integrity of each data byte.
- a receiver can perform a bit error quality assessment by counting the number of bytes with improper parity. A weak path would have a high proportion of improper parity bytes, whereas a strong path would exhibit a low proportion of improper parity bytes.
- error correction bytes are appended to the data messages.
- a count of the number of times the correction bytes are employed to self-correct the data message may also be utilized as a quality assessment measure.
- the aforementioned quality assessments are independent of the data content of the signals being transmitted by the transmitting station, and therefore each station can monitor the quality without the need to decode, per se, each of the transmissions. This allows for a quality assessment with minimal overhead, and also allows for security means, such as the encryption of the data contents, to be employed without impacting the feasibility of this quality assessment.
- monitoring the routine transmissions of the stations performs the quality assessment; that is, a separate test messaging procedure is not required. This requires, however, that the station routinely transmit, for the quality assessment to occur. If a station has no traffic to send for an extended period, the protocol can be enhanced to include a prompt by the central controller for the station to transmit a dummy, or test, message.
- the quality assessment can occur regularly, or on demand. If it is known that the network is relatively stable, the quality assessment may be made only upon the entry or removal of a station from the network. If the network is dynamic, for example, comprising mobile wireless terminal, such that the characteristics of each path may change often, quality assessments may be made continuously, with each transmission. Also dependent upon the dynamic nature of the network, alternative means can be employed to process a number of quality assessments for each path. For example, a running average may be maintained and updated with each transmission assessment, or, the latest assessment may replace any prior assessment. In a very low error rate and stable environment, a cumulative measure may be utilized, such as the sum of parity errors received over the previous N transmissions.
- the quality assessment process is shown in figure 3 as a partial block diagram of a receiving station.
- the receiving station receives an RF signal 310 into an RF subsystem 320.
- a Medium Access Control (MAC) subsystem 330 operates in conjunction with a wireless control block 340 to direct selected portions of the received signal to the link monitor 350.
- the MAC subsystem 330 and wireless control block 340 determine which transmitter is transmitting the signal being received, as discussed above, and the link monitor 350 performs the SNR measurements or bit error measurements discussed above.
- the results of the assessment, and the corresponding transmitting station identifier, are stored in a local database 360 within each receiving station.
- Each station will maintain, in its local database 360, a quality assessment for each path to each other station. For example, station 1 will maintain the quality assessments for paths 2-1, 3-1, 4-1, etc. Station 3 will maintain the quality assessments for paths 1-3, 2-3, 4-3, etc.
- the block diagram of a central controller is shown in figure 4.
- the centralized controller will periodically poll the stations within the network for the quality assessments.
- the centralized controller because the centralized controller is typically also an operational wireless terminal, the centralized controller contains elements similar to those of figure 3.
- the centralized controller as a wireless station, maintains a local database 360, as discussed above.
- the centralized controller also contains a QoS manager 470, which performs the time allocation process for controlling the MAC subsystem 330.
- the QoS manager via the MAC protocol, polls the stations for their quality assessments.
- the QoS manager 470 Upon receipt of these assessments, via the RF subsystem 320, the wireless control block 340, and the MAC subsystem 330, the QoS manager 470 stores the quality factors from each station, and from its own local database 360, into a Global Database 480.
- the global database will contain a quality assessment for each path within the network. From this assessment, the centralized controller can assess how well its transmissions are being received by each of the other stations. More significantly, it can assess whether any station is being received by each of the other stations with a higher quality measure.
- any number of techniques may be employed to evaluate the network quality assessment measurements to select a preferred station to be utilized as centralized controller.
- Figure 5 shows the organization of the quality measurements as a matrix. The rows of the matrix are the transmitting station identifiers, and the columns of the matrix are the receiving station identifiers. The entry at each cell of the matrix is the reported quality assessment, ranging from 0 for low quality, to 100 for high quality.
- transmitters 4 and 7 are shown having a quality of 0 for each receiver, indicating that transmitters 4 and 7 are no longer actively transmitting in the network. Alternatively, the entries for these stations could contain the last reported values concerning these stations.
- station 8 is the centralized controller, it can be determined that station 2 would be a preferable station to perform the functions of a centralized controller.
- transmissions from station 2 are received at each other station with a higher quality measure than transmissions from station 8. That is, the entry at row 2, column 1, hereinafter referred to as cell 2-1, representing the quality of transmission from station 2 to station 1, is 82.
- cell 8-1 row 8, column 1
- transmission from station 2 are received at station 1 with higher quality than transmissions from station 8. From the perspective of station 1, station 2 is preferred to station 8.
- station 2 is said to dominate station 8, with respect to receptions at each of the other stations.
- station 2 has the capability of providing central controller services
- the network can be reconfigured to replace station 8 with station 2 as the central controller. This reconfiguration can be accomplished by having station 8 send a message to station 2, instructing it to assume the role of central controller. Accompanying this message would be any information required by station 2 to perform the tasks of the central controller for the existing network, including such items as the current network configuration, the assigned QoS to each station, etc. Thereafter station 2 would respond to requests for services from the other stations and respond accordingly.
- station having the highest minimum value may be selected as the preferred centralized controller.
- station 2 dominates station 8
- station 5 may be selected as the preferred centralized controller because its minimum received quality is 67, at cell 5-3. That is, even though its signal is not received as strongly at station 1 than that of either stations 2 or 8, having a quality of 71 at 5-1, compared to qualities of 82 and 78 at 2-1 and 8-1 respectively, the reception of signals from station 5 is at least 67 for all stations, whereas station 2 has a quality measure of 48 at receive station 6 (cell 2-6), and station 8 has a quality measure of 42 at station 3 (cell 8-3).
- An alternative selection technique can be to choose the station having the greatest average received quality, or the greatest mean squared received value, or other characteristic statistic value. Additionally, a combination of these techniques can be employed. For example, a specified minimum value can be required, and from among those stations having each of their quality measures greater than the specified minimum, the station having the highest average quality measure can be selected. In addition to considering the quality of a station's transmissions to each of the other stations, the station's reception quality from each of the other stations can be considered. For example, the station having the highest minimum entries in its corresponding rows and column in the matrix may be selected as the preferred station. Or, the station which has at least a specified minimum quality of reception from other stations and has the highest average quality of reception of its transmissions to the other stations may be the preferred centralized controller. These and other selection and optimization techniques are well known to one skilled in the art, and are within the scope and spirit of this invention.
- the selection of a new centralized controller can be made to be dependent upon the quality assessment of the existing centralized controller. That is, for example, a new centralized controller may not be selected unless and until the existing centralized controller falls below some specified quality criteria. In this way, the overhead required to transfer control to another station can be avoided until it becomes important for the integrity of the network.
- a further use of the quality assessment in accordance with this invention is to select alternative relay retransmission paths. If a path has a poor quality, efficiency will be lost as transmissions across this path may often require repetition until they are received accurately.
- Most protocols include some form of ACK/NAK (Acknowledged/Not- Acknowledged) signaling. When an intended receiver does not respond with an acknowledge signal, directly or via the centralized controller, the transmitter must resent the transmitted message. Efficiency may be improved by nothing which paths require repeated transmissions, and replace the affected paths with alternative, relay paths, wherein messages are transmitted to one station, for relay to another station. Such a relay will require two transmissions per message; the message is transmitted from the original transmitter to the relay station, and then from the relay station to the original intended receiver.
- a gain in efficiency can be achieved by instituting such a relay path if the original (direct) path averaged more than one repetition per message.
- transmission path 1-3 with a quality measure of 21 shown in figure 5. If this path exhibits frequent repetitions of transmissions, due to the poor quality, a more reliable and efficient alternative path can be created by considering the quality measures of other paths.
- Transmission path 1-6 shows a high quality measure (88), as does path 6-3 (91). Based on these measured quality levels, the problematic path 1-3 can be replaced by a relay path of 1-6- 3; that is, transmissions from station 1 intended for station 3 will be received by station 6 and retransmitted by station 6 to station 3.
- Relay paths may also be instituted based solely on the measured quality levels. That is, for example, quality levels below a specified value may be considered a priori unreliable. If a path is deemed unreliable, an alternative relay path is established. That is, for example, if a quality level of 25 is selected as a threshold value, below which a path is deemed unreliable, then path 1-3 in figure 5, having a quality level of 21, would be deemed unreliable, regardless of the number of retransmission experienced between paths 1 and 3. Based on this determination, alternative relay path 1-6-3 would be instituted as discussed above.
- both techniques may be employed to initiate the institution of a relay path: a relay path is established if either the retransmission rate of the path is above a specified level or if the quality measure is below a specified level. Or, a set of combinations of retransmission rates and quality levels could be used to institute a relay path. For example, path 3-1 has a mediocre quality level (35) shown in figure 5. A rule may be established such that any path having a quality level below 40 will be replaced by a relay path upon the occurrence of the first request for retransmission. Thereby, if no retransmissions are required on path 3-1, despite its somewhat low quality level, it would not be replaced by an alternative relay path.
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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EP98932461A EP0945037A2 (en) | 1997-08-27 | 1998-07-27 | An apparatus and method for peer-to-peer link monitoring of a wireless network with centralized control |
JP51409899A JP2001505035A (en) | 1997-08-27 | 1998-07-27 | Apparatus and method for monitoring a peer-to-peer link in a centralized control wireless network |
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US08/919,052 | 1997-08-27 | ||
US08/919,052 US6751196B1 (en) | 1997-08-27 | 1997-08-27 | Apparatus and method for peer-to-peer link monitoring of a wireless network with centralized control |
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WO1999011081A2 true WO1999011081A2 (en) | 1999-03-04 |
WO1999011081A3 WO1999011081A3 (en) | 1999-05-20 |
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PCT/IB1998/001141 WO1999011081A2 (en) | 1997-08-27 | 1998-07-27 | An apparatus and method for peer-to-peer link monitoring of a wireless network with centralized control |
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US (3) | US6751196B1 (en) |
EP (1) | EP0945037A2 (en) |
JP (1) | JP2001505035A (en) |
WO (1) | WO1999011081A2 (en) |
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FR2798024A1 (en) * | 1999-08-27 | 2001-03-02 | Canon Kk | COMMUNICATION METHOD AND DEVICE IN A CENTRALIZED TYPE NETWORK AND NETWORK COMPRISING SUCH A DEVICE |
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US6934297B1 (en) * | 2000-11-02 | 2005-08-23 | Agency For Science, Technology And Research | Method and apparatus for communicating in a distributed multiple access wireless communication system |
US7079574B2 (en) * | 2001-01-17 | 2006-07-18 | Radiant Networks Plc | Carrier phase recovery system for adaptive burst modems and link hopping radio networks |
JP2002278903A (en) * | 2001-03-15 | 2002-09-27 | Sony Corp | Information processor, information processing method, recording medium and program |
JP2005051277A (en) * | 2001-06-08 | 2005-02-24 | Sony Corp | Method for building up radio network, radio communication system, radio communication apparatus, and communication method |
EP1289198B1 (en) * | 2001-09-03 | 2005-03-02 | Sony International (Europe) GmbH | Handover of a central controller in an ad-hoc establised device network |
DE60110064T2 (en) * | 2001-09-03 | 2006-03-02 | Sony International (Europe) Gmbh | Optimization of data traffic in a fixed ad-hoc network |
US8489063B2 (en) * | 2001-10-24 | 2013-07-16 | Sipco, Llc | Systems and methods for providing emergency messages to a mobile device |
US7480501B2 (en) * | 2001-10-24 | 2009-01-20 | Statsignal Ipc, Llc | System and method for transmitting an emergency message over an integrated wireless network |
US7330472B2 (en) * | 2001-10-26 | 2008-02-12 | Sharp Laboratories Of America, Inc. | System and method for hybrid coordination in a wireless LAN |
US7424527B2 (en) | 2001-10-30 | 2008-09-09 | Sipco, Llc | System and method for transmitting pollution information over an integrated wireless network |
US7522563B2 (en) * | 2001-11-28 | 2009-04-21 | Millennial Net, Inc. | Network protocol |
US7027409B2 (en) * | 2002-01-10 | 2006-04-11 | Harris Corporation | Method and device for establishing communication links and for estimating overall quality of a directional link and reporting to OLSR in a communication system |
SE524733C2 (en) * | 2002-02-25 | 2004-09-21 | Ericsson Telefon Ab L M | Procedure and systems for retransmitting mobile IP services in a telecommunications system |
US6925069B2 (en) * | 2002-04-19 | 2005-08-02 | Meshnetworks, Inc. | Data network having a wireless local area network with a packet hopping wireless backbone |
US7424268B2 (en) * | 2002-04-22 | 2008-09-09 | Cisco Technology, Inc. | System and method for management of a shared frequency band |
US7269151B2 (en) * | 2002-04-22 | 2007-09-11 | Cognio, Inc. | System and method for spectrum management of a shared frequency band |
US7580370B2 (en) * | 2002-06-21 | 2009-08-25 | International Business Machines Corporation | Method and structure for autoconfiguration of network destinations |
US7408907B2 (en) * | 2002-09-11 | 2008-08-05 | Cisco Technology, Inc. | System and method for management of a shared frequency band using client-specific management techniques |
US20040081089A1 (en) * | 2002-09-26 | 2004-04-29 | Sharp Laboratories Of America, Inc. | Transmitting data on scheduled channels in a centralized network |
US7653012B2 (en) * | 2002-09-26 | 2010-01-26 | Sharp Laboratories Of America, Inc. | Relay transmission of data in a centralized network |
US8046484B2 (en) * | 2002-09-26 | 2011-10-25 | Sharp Laboratories Of America, Inc. | Transmitting data across a contention channel in a centralized network |
US8468252B2 (en) * | 2002-09-26 | 2013-06-18 | Sharp Laboratories Of America, Inc. | Selecting optimal transmission in a centralized network |
US7184777B2 (en) * | 2002-11-27 | 2007-02-27 | Cognio, Inc. | Server and multiple sensor system for monitoring activity in a shared radio frequency band |
US7920538B2 (en) * | 2003-12-08 | 2011-04-05 | Investors Life Insurance Company | Spectral reuse transceiver-based aggregation of disjoint, relatively narrow bandwidth (voice) channel segments of radio spectrum for wideband RF communication applications |
US7616606B2 (en) | 2002-12-10 | 2009-11-10 | Adapt4, Llc | Mechanism for avoiding triggering silent radio squelch circuits |
US8340155B2 (en) | 2002-12-10 | 2012-12-25 | Investors Life Insurance Corporation | Techniques for generating and using a reservation map |
CA2509362A1 (en) * | 2002-12-10 | 2004-06-24 | Data Flow Systems, Inc. | Radio communication system employing spectral reuse transceivers |
JP4027818B2 (en) * | 2003-02-21 | 2007-12-26 | 株式会社エヌ・ティ・ティ・ドコモ | Multihop communication system, radio control station, radio station, and multihop communication method |
US7313399B2 (en) * | 2003-06-05 | 2007-12-25 | Millennial Net, Inc. | Protocol for configuring a wireless network |
KR20060018882A (en) * | 2003-06-06 | 2006-03-02 | 메시네트웍스, 인코포레이티드 | A method to provide a measure of link reliability to a routing protocol in an ad hoc wireless network |
JP3748443B2 (en) * | 2003-06-26 | 2006-02-22 | 松下電器産業株式会社 | Wireless receiver |
ES2308241T3 (en) | 2003-08-06 | 2008-12-01 | Panasonic Corporation | TERMINAL DEVICE AND METHOD FOR MASTER-ESCALVO TRANSFER IN A MEDIA ACCESS COMMUNICATIONS SYSTEM. |
JP3863871B2 (en) * | 2003-09-09 | 2006-12-27 | 株式会社国際電気通信基礎技術研究所 | Transmission rate control method and communication apparatus |
US7639662B1 (en) * | 2003-09-19 | 2009-12-29 | Rockwell Collins, Inc. | Quality of service congestion metrics propagated using routing updates system and method |
US7110756B2 (en) * | 2003-10-03 | 2006-09-19 | Cognio, Inc. | Automated real-time site survey in a shared frequency band environment |
US8213301B2 (en) * | 2003-11-07 | 2012-07-03 | Sharp Laboratories Of America, Inc. | Systems and methods for network channel characteristic measurement and network management |
JP2007516662A (en) * | 2003-11-07 | 2007-06-21 | シャープ株式会社 | System and method for network channel characteristic value measurement and network management |
JP4349139B2 (en) * | 2004-01-30 | 2009-10-21 | 株式会社日立製作所 | Wireless network expansion method |
US20050174950A1 (en) * | 2004-02-09 | 2005-08-11 | Sharp Laboratories Of America, Inc. | Distributed network organization and topology discovery in ad-hoc network |
US7756086B2 (en) * | 2004-03-03 | 2010-07-13 | Sipco, Llc | Method for communicating in dual-modes |
US8031650B2 (en) | 2004-03-03 | 2011-10-04 | Sipco, Llc | System and method for monitoring remote devices with a dual-mode wireless communication protocol |
US8483140B1 (en) * | 2004-03-05 | 2013-07-09 | AT&T Mobiity II LLC | Intelligent uplink resource release control in a mobile station |
US7689221B1 (en) * | 2004-03-05 | 2010-03-30 | At&T Mobility Ii Llc | System and method of providing intelligent cell reselection for delay sensitive data applications |
CA2557609A1 (en) * | 2004-03-10 | 2005-09-15 | Ab Seesta Oy | Heterogeneous network system, network node and mobile host |
FI119088B (en) * | 2004-03-10 | 2008-07-15 | Seesta Oy Ab | Dynamic heterogeneous network system for e.g. internet browsing, has five building blocks including mobile host, access network, network node, authentication-authorization-accounting node and external network |
FI119089B (en) * | 2004-03-10 | 2008-07-15 | Seesta Oy Ab | Dynamic heterogeneous network system for e.g. internet browsing, has five building blocks including mobile host, access network, network node, authentication-authorization-accounting node and external network |
US7460837B2 (en) * | 2004-03-25 | 2008-12-02 | Cisco Technology, Inc. | User interface and time-shifted presentation of data in a system that monitors activity in a shared radio frequency band |
US20050254430A1 (en) * | 2004-05-13 | 2005-11-17 | Clark Pamela H | Method and apparatus for optimized routing in networks that include free space directional links |
US20060031429A1 (en) * | 2004-08-06 | 2006-02-09 | Sharp Laboratories Of America, Inc. | Central coordinator selection in ad hoc network |
US7733788B1 (en) | 2004-08-30 | 2010-06-08 | Sandia Corporation | Computer network control plane tampering monitor |
EP1633088A1 (en) * | 2004-09-02 | 2006-03-08 | Deutsche Thomson-Brandt Gmbh | Method and device for improving quality-of-service management in peer-to-peer networks |
US20060140147A1 (en) * | 2004-12-23 | 2006-06-29 | Van Bemmel Jeroen | Bandwidth allocation protocol for shared wireless networks |
US7970344B2 (en) * | 2004-12-27 | 2011-06-28 | Panasonic Corporation | Wireless communication apparatus, wireless communication method and wireless communication system |
US9439126B2 (en) | 2005-01-25 | 2016-09-06 | Sipco, Llc | Wireless network protocol system and methods |
FR2883690A1 (en) * | 2005-03-22 | 2006-09-29 | France Telecom | METHOD OF ESTABLISHING COMMUNICATION IN A NETWORK |
WO2006106537A1 (en) * | 2005-04-06 | 2006-10-12 | Power-One Italy S.P.A. | Method for transmission of information between nodes of a network and network using said method |
US8995448B2 (en) | 2005-04-06 | 2015-03-31 | Power One Italy S.P.A. | Method for transmission of information between nodes of a network and network using said method |
US7844308B2 (en) * | 2005-06-01 | 2010-11-30 | Millennial Net, Inc. | Communicating over a wireless network |
US7606199B2 (en) * | 2005-07-14 | 2009-10-20 | Sharp Laboratories Of America, Inc. | Central coordinator selection, handover, backup and failure recovery |
JP4627465B2 (en) * | 2005-09-02 | 2011-02-09 | 株式会社エヌ・ティ・ティ・ドコモ | Wireless communication terminal and QoS information collecting method |
EP1938485A4 (en) * | 2005-09-20 | 2015-04-22 | Maxtech Networks Ltd | Real time peer to peer network |
US20070070911A1 (en) * | 2005-09-29 | 2007-03-29 | Goldberg Keith J | Method for testing links in a wireless network |
US7925765B2 (en) * | 2006-04-07 | 2011-04-12 | Microsoft Corporation | Cooperative diagnosis in a wireless LAN |
US8619623B2 (en) | 2006-08-08 | 2013-12-31 | Marvell World Trade Ltd. | Ad-hoc simple configuration |
US8732315B2 (en) | 2006-10-16 | 2014-05-20 | Marvell International Ltd. | Automatic ad-hoc network creation and coalescing using WiFi protected setup |
US8233456B1 (en) | 2006-10-16 | 2012-07-31 | Marvell International Ltd. | Power save mechanisms for dynamic ad-hoc networks |
US9308455B1 (en) | 2006-10-25 | 2016-04-12 | Marvell International Ltd. | System and method for gaming in an ad-hoc network |
EP2077629A1 (en) * | 2006-10-27 | 2009-07-08 | Panasonic Corporation | Wireless communication device and wireless communication method |
US8312098B2 (en) * | 2006-11-09 | 2012-11-13 | Abbott Medical Optics Inc. | Serial communications protocol for safety critical systems |
US8520535B2 (en) * | 2007-05-31 | 2013-08-27 | International Business Machines Corporation | Optimization process and system for a heterogeneous ad hoc Network |
US10419360B2 (en) | 2007-05-31 | 2019-09-17 | International Business Machines Corporation | Market-driven variable price offerings for bandwidth-sharing ad hoc networks |
US10623998B2 (en) | 2007-05-31 | 2020-04-14 | International Business Machines Corporation | Price offerings for bandwidth-sharing ad hoc networks |
US7860081B2 (en) * | 2007-05-31 | 2010-12-28 | International Business Machines Corporation | Optimization process and system for multiplexed gateway architecture |
US8040863B2 (en) * | 2007-05-31 | 2011-10-18 | International Business Machines Corporation | Demand pull and supply push communication methodologies |
US7843861B2 (en) * | 2007-05-31 | 2010-11-30 | International Business Machines Corporation | Coalition formation and service provisioning of bandwidth sharing AD HOC networks |
US7898993B2 (en) * | 2007-05-31 | 2011-03-01 | International Business Machines Corporation | Efficiency and resiliency enhancements for transition states in ad hoc networks |
US8620784B2 (en) | 2007-05-31 | 2013-12-31 | International Business Machines Corporation | Formation and rearrangement of ad hoc networks |
US7873019B2 (en) * | 2007-05-31 | 2011-01-18 | International Business Machines Corporation | Systems and methods for establishing gateway bandwidth sharing ad-hoc networks |
US7979311B2 (en) * | 2007-05-31 | 2011-07-12 | International Business Machines Corporation | Payment transfer strategies for bandwidth sharing in ad hoc networks |
US8249984B2 (en) | 2007-05-31 | 2012-08-21 | International Business Machines Corporation | System and method for fair-sharing in bandwidth sharing ad-hoc networks |
US8320414B2 (en) | 2007-05-31 | 2012-11-27 | International Business Machines Corporation | Formation and rearrangement of lender devices that perform multiplexing functions |
US7817623B2 (en) * | 2007-05-31 | 2010-10-19 | International Business Machines Corporation | Optimization process and system for non-multiplexed peer-to-peer architecture |
WO2009006585A1 (en) | 2007-07-03 | 2009-01-08 | Marvell Semiconductor, Inc. | Location aware ad-hoc gaming |
US8694662B2 (en) * | 2007-07-10 | 2014-04-08 | Qualcomm Incorporated | Method and apparatus for communicating transmission requests to members of a group and/or making group related transmission decisions |
US8495232B2 (en) * | 2007-07-10 | 2013-07-23 | Qualcomm Incorporated | Methods and apparatus for supporting broadcast communications in a peer to peer network |
US20090016317A1 (en) * | 2007-07-10 | 2009-01-15 | Qualcomm Incorporated | Methods and apparatus for supporting group communications utilizing device identifiers |
US7961698B2 (en) | 2007-07-10 | 2011-06-14 | Qualcomm Incorporated | Methods and apparatus for controlling interference to broadcast signaling in a peer to peer network |
US20090031381A1 (en) * | 2007-07-24 | 2009-01-29 | Honeywell International, Inc. | Proxy video server for video surveillance |
US20090031885A1 (en) * | 2007-07-31 | 2009-02-05 | Christopher Lee Bennetts | Networked karaoke system and method |
US20090031883A1 (en) * | 2007-07-31 | 2009-02-05 | Christopher Lee Bennetts | Networked karaoke system and method |
GB0725052D0 (en) * | 2007-12-21 | 2008-01-30 | Fujitsu Lab Of Europ Ltd | Communications system |
GB2457254B (en) * | 2008-02-06 | 2010-12-29 | Toshiba Res Europ Ltd | Optimisation of wireless multimedia data transmission |
US8670440B2 (en) * | 2008-05-13 | 2014-03-11 | Electronics And Telecommunications Research Institute | Data transceiving apparatus and method in centralized MAC-based wireless communication system |
JP5103324B2 (en) * | 2008-08-18 | 2012-12-19 | 一般財団法人電力中央研究所 | Sensor terminal arrangement support method and program for wireless sensor network |
US9912568B2 (en) * | 2009-06-24 | 2018-03-06 | Provenance Asset Group Llc | Method and apparatus for handling broken path in peer-to-peer network |
US8077630B2 (en) * | 2009-06-24 | 2011-12-13 | Verizon Patent And Licensing Inc. | Voice over internet protocol diagnostics |
US20110026504A1 (en) * | 2009-07-31 | 2011-02-03 | Sony Corporation | Continuous group ownership in an ieee 802.11 wireless local area network |
US8458548B2 (en) * | 2009-12-22 | 2013-06-04 | Intel Corporation | Adaptive H-ARQ using outage capacity optimization |
DE102010012285A1 (en) * | 2010-01-14 | 2011-07-21 | Rohde & Schwarz GmbH & Co. KG, 81671 | Method and system for measuring mobile stations in communication networks with virtual antenna arrays |
FR2956940B1 (en) * | 2010-02-26 | 2013-10-04 | Eads Defence & Security Sys | METHOD FOR MANAGING A CELL OF A RADIOTELECOMMUNICATION NETWORK |
FR2973614B1 (en) * | 2011-04-01 | 2013-05-10 | Commissariat Energie Atomique | METHOD FOR ASSESSING THE QUALITY OF RADIO LINKS FOR A WIRELESS BODY NETWORK, METHOD FOR TRANSMITTING MESSAGES FOR A WIRELESS BODY NETWORK AND DEVICES FOR CARRYING OUT SAID METHODS |
US9264353B2 (en) * | 2011-09-22 | 2016-02-16 | Qualcomm Incorporated | Dynamic subflow control for a multipath transport connection in a wireless communication network |
DE102011120827B4 (en) | 2011-12-13 | 2019-03-21 | Andrew Wireless Systems Gmbh | Communication network |
US9451654B2 (en) * | 2012-08-27 | 2016-09-20 | Qualcomm Incorporated | Systems and methods for multi-hop relay selection |
GB201314080D0 (en) | 2013-08-06 | 2013-09-18 | Nec Corp | Communication system,apparatus and related methods of operation |
CN104363130B (en) * | 2014-07-03 | 2018-02-16 | 上海赛特斯信息科技股份有限公司 | The system and method for network quality case study location control is realized in communication network |
US20160037366A1 (en) * | 2014-08-01 | 2016-02-04 | Cox Communications, Inc. | Detection and reporting of network impairments |
CN113692298B (en) | 2019-04-17 | 2024-02-13 | 巴德阿克塞斯系统股份有限公司 | Catheter securement devices including extended anchor pad and release liner snap-fit features |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996034501A1 (en) * | 1995-04-25 | 1996-10-31 | American Personal Communications | An autonomous remote measurement unit for a personal communications service system |
EP0777395A1 (en) * | 1995-12-01 | 1997-06-04 | Nokia Mobile Phones Ltd. | Use of header fields of an ATM cell in radio connected ATM data transfer |
Family Cites Families (33)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3629931A1 (en) * | 1986-09-03 | 1988-03-10 | Philips Patentverwaltung | HIERARCHICAL SYNCHRONIZATION METHOD AND CIRCUIT ARRANGEMENT FOR SWITCHING CENTERS OF A INTERMEDIATED TELECOMMUNICATION NETWORK |
DE3642141A1 (en) * | 1986-12-10 | 1988-06-16 | Philips Patentverwaltung | METHOD FOR DECENTRALIZED POWER SUPPLY CIRCUIT |
GB2228162B (en) * | 1989-02-08 | 1993-05-19 | Philips Electronic Associated | Mobile radio transmission system and a mobile station for use in the system |
GB2232326A (en) * | 1989-05-26 | 1990-12-05 | Philips Electronic Associated | Data transmission over a tdm duplex frequency channel |
US5612960A (en) * | 1991-12-20 | 1997-03-18 | Ncr Corporation | Radio LAN station with improved point-to-point link diagnostic capability and method of operation thereof |
AU670955B2 (en) * | 1992-08-04 | 1996-08-08 | Koninklijke Philips Electronics N.V. | Mobile radio system |
JPH06165242A (en) * | 1992-10-26 | 1994-06-10 | Philips Electron Nv | Communication system |
US5471503A (en) * | 1992-12-29 | 1995-11-28 | Apple Computer, Inc. | Scanning method for receiving a transmission in a communication system with slow frequency hopping and coding |
US5448758A (en) * | 1993-02-26 | 1995-09-05 | Motorola, Inc. | Simulcast group determination of best signal by master site |
US5361258A (en) * | 1993-10-22 | 1994-11-01 | Bell Communications Research, Inc. | Beacon detection system for sharing spectrum between wireless communications systems and fixed microwave systems |
US5485455A (en) * | 1994-01-28 | 1996-01-16 | Cabletron Systems, Inc. | Network having secure fast packet switching and guaranteed quality of service |
AU1974795A (en) * | 1994-03-03 | 1995-09-18 | Proxim, Inc. | Frequency hopping medium access control protocol |
CA2145921A1 (en) * | 1994-05-10 | 1995-11-11 | Vijay Pochampalli Kumar | Method and apparatus for executing a distributed algorithm or service on a simple network management protocol based computer network |
CA2129199C (en) * | 1994-07-29 | 1999-07-20 | Roger Y.M. Cheung | Method and apparatus for bridging wireless lan to a wired lan |
US5784368A (en) * | 1994-09-23 | 1998-07-21 | Motorola, Inc. | Method and apparatus for providing a synchronous communication environment |
JP3223055B2 (en) * | 1994-11-11 | 2001-10-29 | 株式会社日立製作所 | Wireless LAN system and base station device thereof |
US5583866A (en) * | 1994-12-05 | 1996-12-10 | Motorola, Inc. | Method for delivering broadcast packets in a frequency hopping local area network |
MY123040A (en) * | 1994-12-19 | 2006-05-31 | Salbu Res And Dev Proprietary Ltd | Multi-hop packet radio networks |
US5757783A (en) * | 1995-06-15 | 1998-05-26 | Lucent Technologies Inc. | Method and apparatus for routing ATM cells in an AD-ATM LAN |
US5623495A (en) * | 1995-06-15 | 1997-04-22 | Lucent Technologies Inc. | Portable base station architecture for an AD-HOC ATM lan |
US5822309A (en) * | 1995-06-15 | 1998-10-13 | Lucent Technologies Inc. | Signaling and control architecture for an ad-hoc ATM LAN |
US5717689A (en) * | 1995-10-10 | 1998-02-10 | Lucent Technologies Inc. | Data link layer protocol for transport of ATM cells over a wireless link |
JP2944489B2 (en) * | 1995-10-14 | 1999-09-06 | 日本電気株式会社 | Error correction method in wireless transmission system |
US5835485A (en) * | 1995-11-22 | 1998-11-10 | Motorola, Inc. | Method for dynamic routing of communication messages |
US5737318A (en) * | 1995-12-27 | 1998-04-07 | Philips Electronics North America Corporation | Method for initializing a wireless, packet-hopping network |
US5872773A (en) * | 1996-05-17 | 1999-02-16 | Lucent Technologies Inc. | Virtual trees routing protocol for an ATM-based mobile network |
US5787080A (en) * | 1996-06-03 | 1998-07-28 | Philips Electronics North America Corporation | Method and apparatus for reservation-based wireless-ATM local area network |
SE518132C2 (en) * | 1996-06-07 | 2002-08-27 | Ericsson Telefon Ab L M | Method and apparatus for synchronizing combined receivers and transmitters in a cellular system |
US5802466A (en) * | 1996-06-28 | 1998-09-01 | Mci Communications Corporation | Personal communication device voice mail notification apparatus and method |
US6108321A (en) * | 1996-06-28 | 2000-08-22 | Lucent Technologies Inc. | Interference based dynamic channel assignment |
US6052594A (en) * | 1997-04-30 | 2000-04-18 | At&T Corp. | System and method for dynamically assigning channels for wireless packet communications |
US6011780A (en) * | 1997-05-23 | 2000-01-04 | Stevens Institute Of Technology | Transparant non-disruptable ATM network |
US6751196B1 (en) * | 1997-08-27 | 2004-06-15 | Philips Electronics North America Corp. | Apparatus and method for peer-to-peer link monitoring of a wireless network with centralized control |
-
1997
- 1997-08-27 US US08/919,052 patent/US6751196B1/en not_active Expired - Fee Related
-
1998
- 1998-07-27 EP EP98932461A patent/EP0945037A2/en not_active Withdrawn
- 1998-07-27 WO PCT/IB1998/001141 patent/WO1999011081A2/en not_active Application Discontinuation
- 1998-07-27 JP JP51409899A patent/JP2001505035A/en not_active Ceased
-
2002
- 2002-02-20 US US10/080,184 patent/US7110366B2/en not_active Expired - Lifetime
-
2006
- 2006-06-27 US US11/475,540 patent/US20070002763A1/en not_active Abandoned
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996034501A1 (en) * | 1995-04-25 | 1996-10-31 | American Personal Communications | An autonomous remote measurement unit for a personal communications service system |
EP0777395A1 (en) * | 1995-12-01 | 1997-06-04 | Nokia Mobile Phones Ltd. | Use of header fields of an ATM cell in radio connected ATM data transfer |
Cited By (54)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU776380B2 (en) * | 1999-08-25 | 2004-09-09 | Cedardell Limited | Automatic installation process for wireless communication system |
US7072615B1 (en) | 1999-08-25 | 2006-07-04 | Cedardell Limited | Automatic installation process for wireless communication system |
WO2001015112A1 (en) * | 1999-08-25 | 2001-03-01 | Cedardell Limited | Automatic installation process for wireless communication system |
FR2798024A1 (en) * | 1999-08-27 | 2001-03-02 | Canon Kk | COMMUNICATION METHOD AND DEVICE IN A CENTRALIZED TYPE NETWORK AND NETWORK COMPRISING SUCH A DEVICE |
FR2799071A1 (en) * | 1999-09-27 | 2001-03-30 | Canon Kk | Method of communication in a computer network that avoids errors arising from incomplete updating of global network connection table |
JP2002158677A (en) * | 2000-09-11 | 2002-05-31 | Koninkl Philips Electronics Nv | Reconfiguration of ad-hoc network |
WO2002028136A1 (en) * | 2000-09-29 | 2002-04-04 | Siemens Aktiengesellschaft | Communication system and corresponding method for improving the service quality thereof |
US6978140B1 (en) | 2000-09-29 | 2005-12-20 | Siemens Aktiengesellschaft | Communications system and associated method for improving the service quality thereof |
WO2002043289A1 (en) * | 2000-11-21 | 2002-05-30 | Thales | Device for optimising a transmitter in accordance with transmission conditions, and reference receiver and transmitter for use in said device |
FR2817092A1 (en) * | 2000-11-21 | 2002-05-24 | Thomson Csf | Transmission condition transmission chain of optimization having communications network input receiving signal quality parameter set evaluating quality and optimizing transmitter chain element. |
HRP20030411B1 (en) * | 2000-11-21 | 2012-06-30 | Thales | Device for optimising a transmitter in accordance with transmission conditions, and reference receiver and transmitter for use in said device |
US7376747B2 (en) | 2000-12-20 | 2008-05-20 | Ncr Corporation | Streaming of data |
ES2192942A1 (en) * | 2001-06-25 | 2003-10-16 | Viarga Vai S L | Information exchange system for telephone devices based on Peer-to-Peer technology |
WO2003007552A2 (en) * | 2001-07-13 | 2003-01-23 | Universita' Degli Studi Di Roma 'la Sapienza' | Method for dynamically electing the master among computers or stations of a mobile wireless local area network |
WO2003007552A3 (en) * | 2001-07-13 | 2003-10-02 | Univ Roma | Method for dynamically electing the master among computers or stations of a mobile wireless local area network |
EP1324540A3 (en) * | 2001-12-28 | 2006-05-10 | Kabushiki Kaisha Toshiba | Radio communication device |
EP1324540A2 (en) * | 2001-12-28 | 2003-07-02 | Kabushiki Kaisha Toshiba | Radio communication device |
US7164887B2 (en) | 2001-12-28 | 2007-01-16 | Kabushiki Kaisha Toshiba | Radio communication device |
US7362701B2 (en) * | 2002-01-14 | 2008-04-22 | Sun Microsystems, Inc. | Customer-based service system including a cascaded pipeline with self-monitoring relays |
US7028097B2 (en) | 2002-03-28 | 2006-04-11 | Intel Corporation | Wireless LAN with dynamic channel access management |
WO2003084149A2 (en) * | 2002-03-28 | 2003-10-09 | Intel Corporation | Wireless lan with dynamic channel access management |
CN100397833C (en) * | 2002-03-28 | 2008-06-25 | 英特尔公司 | Wireless lan with dynamic channel access management |
WO2003084149A3 (en) * | 2002-03-28 | 2003-11-06 | Intel Corp | Wireless lan with dynamic channel access management |
EP1535182A1 (en) * | 2002-06-21 | 2005-06-01 | International Business Machines Corporation | Method and structure for autoconfiguration of overlay networks by automatic selection of a network designated router |
US7769839B2 (en) | 2002-06-21 | 2010-08-03 | International Business Machines Corporation | Method and structure for autoconfiguration of overlay networks by automatic selection of a network designated router |
EP1535182A4 (en) * | 2002-06-21 | 2008-06-04 | Ibm | Method and structure for autoconfiguration of overlay networks by automatic selection of a network designated router |
EP1527633A4 (en) * | 2002-07-31 | 2007-06-20 | Interdigital Tech Corp | Wireless personal communicator and communication method |
EP1527633A2 (en) * | 2002-07-31 | 2005-05-04 | Interdigital Technology Corporation | Wireless personal communicator and communication method |
EP1389856A1 (en) * | 2002-08-13 | 2004-02-18 | Siemens Aktiengesellschaft | Method to allocate radio resources in an ad-hoc radio communication system |
EP1465373A3 (en) * | 2003-04-01 | 2008-04-16 | Samsung Electronics Co., Ltd. | Method for Bluetooth master selection |
US7613424B2 (en) | 2003-04-01 | 2009-11-03 | Samsung Electronics Co., Ltd. | Method for performing bluetooth high rate supervisor handover |
EP1503544A2 (en) * | 2003-07-26 | 2005-02-02 | Samsung Electronics Co., Ltd. | Method for transmitting a frame at a high rate in a wireless local area network |
EP1503544A3 (en) * | 2003-07-26 | 2007-02-28 | Samsung Electronics Co., Ltd. | Method for transmitting a frame at a high rate in a wireless local area network |
US7489668B2 (en) | 2003-07-26 | 2009-02-10 | Samsung Electronics Co., Ltd. | Method for transmitting a frame at a high rate in a wireless local area network |
US8666423B2 (en) | 2003-10-31 | 2014-03-04 | Nokia Siemens Networks Gmbh & Co. Kg | Method and device for determining routings and for allocating radio resources for the determined routings in a radio communications system |
WO2005043835A1 (en) * | 2003-10-31 | 2005-05-12 | Siemens Aktiengesellschaft | Method and device for determining routings and for allocating radio resources for the determined routings in a radio communications system |
US8284709B2 (en) | 2005-11-11 | 2012-10-09 | Lg Electronics Inc. | Method of controlling relay communication |
WO2007055544A2 (en) | 2005-11-11 | 2007-05-18 | Lg Electronics Inc. | Method of controlling relay communication |
US9059890B2 (en) | 2005-11-11 | 2015-06-16 | Lg Electronics Inc. | Method of controlling relay communication |
WO2007055544A3 (en) * | 2005-11-11 | 2008-08-28 | Lg Electronics Inc | Method of controlling relay communication |
EP2393318A1 (en) * | 2009-01-30 | 2011-12-07 | Sanyo Electric Co., Ltd. | Notifying method and wireless device |
CN103973385A (en) * | 2009-01-30 | 2014-08-06 | 三洋电机株式会社 | Notifying method and wireless device |
EP2393318A4 (en) * | 2009-01-30 | 2014-11-19 | Sanyo Electric Co | Notifying method and wireless device |
WO2010131060A1 (en) * | 2009-05-12 | 2010-11-18 | Datalogic Scanning Group S.R.L. | Method to perform a wireless communication in a data collection system |
US9113476B2 (en) | 2009-05-12 | 2015-08-18 | Datalogic Scanning Group S.R.L. | Method to perform a wireless communication in a data collection system |
EP2552034A4 (en) * | 2010-03-22 | 2015-07-08 | Lg Electronics Inc | Communication method between terminals, and terminal |
GB2490883B (en) * | 2011-05-13 | 2013-10-16 | Canon Kk | A method and device for assessing the robustness of a point-to-point communication path in a wireless network |
GB2490883A (en) * | 2011-05-13 | 2012-11-21 | Canon Kk | Assessing the robustness of a point-to-point communication path between two nodes in a wireless network |
WO2012172513A1 (en) * | 2011-06-15 | 2012-12-20 | Renesas Mobile Corporation | Method, apparatus and computer program for providing communication link monitoring |
EP2755418A1 (en) * | 2013-01-11 | 2014-07-16 | Honeywell International Inc. | Wireless network site survey systems and methods |
US9491639B2 (en) | 2013-01-11 | 2016-11-08 | Honeywell International Inc. | Wireless network site survey systems and methods |
US9877219B2 (en) | 2013-01-11 | 2018-01-23 | Honeywell International Inc. | Wireless network site survey systems and methods |
US10887783B2 (en) | 2013-01-11 | 2021-01-05 | Honeywell International Inc. | Wireless network site survey systems and methods |
EP4093091A4 (en) * | 2020-01-15 | 2023-09-06 | Datang Mobile Communications Equipment Co., Ltd. | Relay device selection method and device, and computer storage medium |
Also Published As
Publication number | Publication date |
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US7110366B2 (en) | 2006-09-19 |
WO1999011081A3 (en) | 1999-05-20 |
JP2001505035A (en) | 2001-04-10 |
US20070002763A1 (en) | 2007-01-04 |
EP0945037A2 (en) | 1999-09-29 |
US6751196B1 (en) | 2004-06-15 |
US20020085503A1 (en) | 2002-07-04 |
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