Abstract: A satellite signal demodulator is configured to use frequency-based channel scanning to sense the presence of a channel and to obtain the frequency profile of the channel. Once the channel is identified and the profile is obtained, channel extraction is used to identify the frequency parameters for a given channel. A coarse parameter estimation is performed to obtain a coarse estimate of the symbol rate (SR) and the center frequency (fc) of the channel. The coarse estimation can then be followed by a fine estimation of the symbol rate and center frequency (fc), using a bit tracking loop (BTL) lock indicator.

Abstract: A method for accessing a hybrid network and a gateway communication system are disclosed. The method comprises: sensing by a gateway apparatus a relay request slot on a downlink common control channel of the wide area network; transmitting by a wireless terminal a relay request signal requesting to relay a data packet to be transmitted, in the relay request slot on the downlink common control channel; and if the relay request signal from the wireless terminal is sensed in the relay request slot, establishing by the gateway apparatus a connection with the wireless terminal in a distributed network environment. As such, the gateway apparatus accesses the wireless distributed network only when the surrounding wireless terminals require data relay, without sensing signals on both networks simultaneously.

Abstract: A mobile station which connects to a base station having a plurality of relays belonging thereto is provided. The mobile station includes a receiving unit which receives a first preamble signal from a first relay and receives a second preamble signal from a second relay, the first relay belonging to a first cluster including an N1 number of relays and the second relay belonging to a second cluster including an N2 number of relays, a control unit which selects the first cluster as an access cluster to connect to the base station, based on the first preamble signal and the second preamble signal, and a transmission unit which transmits an access request message to the first relay, wherein the access request message is transmitted to the base station via the first relay.

Abstract: Disclosed is a satellite beam pointing system that uses color encoded signals from subscribers to align antennas on a satellite and to align the satellite. Subscribers detect the signal strength and signal-to-noise ratio of signals that are transmitted from the satellite. The values of the signal strength and signal-to-noise ratio data are encoded in signals that are transmitted back to a ground station that color encodes the data and graphically displays the signal strength and signal-to-noise ratio of the subscriber received signals. The actual beam projection can then be determined and the satellite antennas moved, so that the actual beam projection coincides with the intended beam projection. Also, the satellite can be properly oriented using this technique.

Abstract: A repeater system including bi-directional amplifier circuitry that is configured for repeating signals between at least one device and a first signal source. Receiver circuitry is coupled with the amplifier circuitry provides at least one signal associated with at least one of a device or the first signal source or a second signal source. Controller circuitry is configured for monitoring a parameter of a provided signal that is reflective of a property of a signal source or a device. The monitored parameter is used to make a determination of whether repeated signals associated with the first signal source will desensitize the operation of the second signal source. The controller circuitry is also operable for adjusting the power level of the signals that are repeated by the bi-directional amplifier circuitry based on the determination that repeated signals will desensitize the operation of the second signal source.

Abstract: A radio frequency identification (RFID) apparatus includes a transmitting/receiving module and a determining module. When the transmitting/receiving module receives a radio frequency (RF) signal comprising a relay command, the determining module determines whether destination information of the relay command corresponds to the RFID apparatus and selectively transmits the content of the RF signal via the transmitting/receiving module.

Abstract: A transparent commodity trading network facilitates transactions among parties. A plurality of mobile communications devices are each configured to broadcast product/service needs and/or product/service offerings of a party associated with the respective mobile communications device. Each mobile communications device is configured to receive product/service needs and/or product/service offerings broadcast by other mobile communications devices when respective mobile communications devices pass within a predetermined distance of each other. Each mobile communications device is configured to identify when a product/service need or product/service offering broadcast by another mobile communications device matches a corresponding product/service offering or broadcast product/service need broadcast by the respective mobile communications device.

Abstract: There is provided a content reproduction apparatus including a reproduction request receiving unit that receives from a first external device conforming to a first communication standard a request to reproduce content data selected by the first external device, a content data obtaining unit that obtains from a second external device conforming to the first communication standard, which stores the content data selected by the first external device, the content data in response to the received request, a content reproduction unit that reproduces the obtained content data, and a data converting unit that converts data which can be transmitted according to the first communication standard into data which can be transmitted according to a second communication standard different than the first communication standard.

Abstract: A network management apparatus is previously registered with a physical connection relationship and positional information of a plurality of network relay apparatuses which form part of a network, as well as a configuration definition corresponding to the positional information, such that the network management apparatus can initially detect network relay apparatuses connected to the network management apparatus, and distribute a configuration definition, which takes into account a connection relationship, to the network relay apparatuses connected thereto to set the configuration definition in the network relay apparatuses in order. In this way, even if wiring is freely made, the configuration definition which should be set in each network relay apparatus can be appropriately distributed to and set in one adjacent network relay apparatus to another. Upon occurrence of a fault, the network can be appropriately recovered by a previously set recovering scheme.

Abstract: A method for circulating a message to a group of people, including sending a circulated message by a 1st mobile communicator, and sequentially receiving the circulated message by an nth mobile communicator and sending the circulated message to an (n+1)st mobile communicator, n=2, 3, . . . , N?1, wherein each one of the N mobile communicators has a distinct phone number. A system is also described and claimed.

Abstract: A hierarchical communication system, arranged in a spanning tree configuration, is described in which wired and wireless communication networks exhibiting substantially different characteristics are employed in an overall scheme to link portable or mobile computing devices. Copies of data, program code and processing resources are migrated from their source toward requesting destinations based on request frequency, communication link costs and available local storage and/or processing resources. Each appropriately configured network device acts as an active participant in network migration. In addition, portable two-dimensional (2-D) code reading terminals are configured to wirelessly communicate compressed 2-D images toward stationary access servers that identify the code image through decoding and through comparison with a database of images that have previously been decoded and stored.

Abstract: A repeating apparatus in a wireless communication system includes: a signal detection unit configured to receive a signal from a base station or a mobile station and detect strength of the signal; a control unit configured to compare the signal strength detected by the signal detection unit with signal strength predetermined by the system and provide comparison information; and an output signal control unit configured to receive the comparison information from the control unit and adjust and amplify gain of a signal transmitted to the base station or the mobile station.

Abstract: There is provided a relay station including a base station-relay station resource allocation request-transmission section which transmits a base station-relay station resource allocation request indicating that allocation of a base station-relay station resource is requested, the base station-relay station resource being a resource used by a radio signal transmitted/received between a base station and the relay station, to the base station using a radio signal, a base station-relay station resource allocation response-reception section which receives base station-relay station resource information indicating the base station-relay station resource from the base station using a radio signal, as a base station-relay station resource allocation response which is a response with respect to the base station-relay station resource allocation request, and a base station-relay station resource information storage section which stores the base station-relay station resource information received by the base station-rel

Abstract: A method of operating a wireless device is provided in which an interference level on a resource is determined. In addition, a signal is transmitted on the resource with a first power when the interference level is low. The first power is such that the signal is received with a first SNR. Furthermore, the signal is transmitted on the resource with a second power when the interference level is high. The second power is such that the signal is received with a second SNR less than the first SNR.

Abstract: To prevent relaying wrong information by determining whether a radio signal is to be relayed in accordance with a function of error detection in the radio signal. A relay station apparatus according to an aspect of the invention is a relay station apparatus which relays a radio signal between a transmission station and a reception station, including: a receiver which is configured to receive the radio signal from the transmission station; and a relay determination section which is configured, in accordance with a function of error detection in the radio signal received by the receiver, to determine whether the signal is to be relayed or not, based on a first channel quality indicating a channel quality from the transmission station to the relay station apparatus.

Abstract: An apparatus and method for transmitting/receiving a Channel Quality Information (CQI) in a communication system are provided. A Mobile Station (MS) receives first information indicating a representative MS selected from a group of MSs located within a preset range and in similar channel statuses, the group including the MS, determines from the first information whether the MS is designated as the representative MS, and transmits a CQI of the MS as a representative CQI of the MSs included in the group to a Base Station (BS), if the MS is designated as the representative MS.

Abstract: An EV-DO terminal module is made up of hardware and software for implementing the function as an EV-DO terminal. A W-LAN terminal module is made up of hardware and software for implementing the function as an AP of W-LAN. An information exchange terminal module has a function equal to that of the W-LAN terminal module. A control module has a dialup function and a function based on PPP protocol and is a hardware and software module for controlling the EV-DO terminal module, the information exchange terminal module, and the W-LAN terminal module.

Abstract: Methods, systems, and computer-readable media provide for utilizing a repeating function to improve quality of service. According to embodiments, a method for utilizing a repeating function to improve quality of service is provided. According to the method a first mobile cellular device is selected. An instruction is transmitted to the first mobile cellular device instructing the first mobile cellular device. The instruction causes the first mobile cellular device to relay communications between the second mobile cellular device and the cellular service provider. The first mobile cellular device thereby provides the repeating function for the second mobile cellular device.

Abstract: A communication apparatus, which is connected to a relay apparatus, and transmits data to a server apparatus connected via the relay apparatus, includes a determination unit which determines whether the communication apparatus or the relay apparatus holds an access function required to execute access processing to the server apparatus, a decision unit which decides, according to the determination result, a transmission method required to transmit the data by controlling an access processing unit of the apparatus that holds the access function to execute the access processing, and a transmission unit which transmits the data by the decided transmission method.

Abstract: In a fixed channel wireless network system with a limited number of channels, assignment of the fixed channels between remote client elements and access elements is made systematically according to a set of criteria accounting for network loading and interference, then channel assignments are dynamically updated according to a priority to maintain optimal network performance with changing conditions of load and interference. The channel utilization problem is address at a system level rather than at a local level by treating the system as a three dimensional color mapping problem. All noise is treated as having a source in virtual access elements with an appropriate performance metric. The performance metric is used to select a channel set that minimize chances of interference and maximize user performance. Specifically, there are several parameter matrices which are managed and updated by a central resource management element, namely signal strength between elements, interference, and load.

Abstract: An apparatus and a method for sending a control information for retransmission in a multihop relay wireless communication system are provided. Data received from a lower node is checked for errors. The data is transmitted to an upper node, when the data has no errors. When two or more information, which include at least one of Acknowledgement (ACK) and Negative ACK (NACK) in response to a data reception are received from one or more lower nodes, the two or more information are transmitted to the upper node at the same time. Accordingly, the RS can transmit the control information for the ARQ provided from the lower nodes, to the upper node at the same time.

Abstract: A relay communication system and a method for transmitting data in the same system, wherein the method for transmitting data comprises: a relay station notifying a transmitting terminal and a receiving terminal of air interface resources which are required when the transmitting terminal transmits data and when the receiving terminal receives the data (S102); the transmitting terminal transmitting the data to the relay station on the air interface recourses, and the relay station forwarding the data to the receiving terminal on the air interface resources (S104). By using the present invention, the times of forwarding the data along a data transmission path can be effectively reduced, and thus improves data transmission efficiency.

Abstract: A relay station has a reception unit receiving a signal sequence indicating a connection request, from among a predetermined signal sequence group; a control unit generating a ranging request message indicating that a radio terminal newly requesting connection exists; and a transmission unit transmitting the ranging request message to a radio base station.

Abstract: Systems, methods and techniques for operating a wireless repeater with multiple antennas are presented. Signals from a wireless communication device are received by a wireless repeater on at least two branch channels associated with at least two repeater receiver antennas. Path or space diversity is resolved from the signals, and the signals are processed on the at least two branch channels to produce at least one strong signal to be repeated to another wireless communication device.

Abstract: A method of performing relay communication in a next generation cellular communication system is disclosed. The next generation cellular communication system includes a base station and a plurality of terminals, and a communication target terminal which has not acquired a Line-Of-Sight (LOS) channel with the base station performs communication through the relay of a relaying terminal which has acquired a LOS channel. The base station determines the relaying terminal. The relaying terminal forms a relaying terminal group by determining one or more relaying assistant terminals. The communication target terminal forms a transmitting/receiving terminal group by determining one or more transmitting/receiving assistant terminals. The base station performs communication with the relaying terminal through the relaying terminal, relaying assistant terminals of the relaying terminal group and the transmitting/receiving assistant terminals of the transmitting/receiving terminal group.

Abstract: A system and method for generating an output signal includes a diverse site, a communication network and a primary site in communication with the diverse site through the communication network. A transport processing system at the primary site communicates a first signal to the diverse site through the communication network. The diverse site generates a first diverse modulator signal at a first diverse modulator and a second diverse modulator signal at a second diverse modulator. The diverse site having a switch coupled to the first diverse modulator and the second diverse modulator and generating a switch output signal corresponding to the first diverse modulator signal and the second diverse modulator signal. The primary site monitors first diverse modulator signal and the second diverse modulator signal and controls the switch in response thereto.

Abstract: A mobile communication system employs moving base stations moving in the direction of flow of traffic moving along a roadway. The moving base station communicates with fixed radio ports connected to a gateway office. A plurality of moving base stations are spaced apart on a closed loop and move with the flow of traffic along one roadway on one leg of the loop and with a flow of traffic on another roadway in another leg of the loop. The moving base stations communicate with a plurality of fixed radio ports connected by a signal transmission link to a gateway office which, in turn, is connected to the wire line network. The moving base stations are each provided with a pair of directional antennas with one antenna directed toward the flow of traffic and another antenna directed to the fixed radio ports.

Abstract: A method for monitoring feedback loop stability in a wireless repeater includes measuring a gain control metric in the feedback loop of the repeater periodically for a given time period where the gain control metric is indicative of a loop gain of the feedback loop of the repeater; and monitoring the magnitude of the gain control metric to determine the stability of the feedback loop of the repeater. In operation, a large magnitude of the gain control metric indicates instability in the feedback loop of the repeater.

Abstract: According to one embodiment, a method for providing location information to a mobile receiver from a plurality of aerial vehicles is provided. The method includes receiving a source location from at least three location sources at each aerial vehicle of the plurality of aerial vehicles. The at least three location sources includes a remote aerial vehicle. A predicted location of the aerial vehicle at a future time is calculated at each aerial vehicle based at least in part on a current time at the aerial vehicle, the received source locations, and ephemeris data that represents motion of each remote aerial vehicle. The predicted location is transmitted at the future time at each aerial vehicle. The transmitted locations from the aerial vehicles are used by a mobile receiver to determine a current location of the mobile receiver.

Abstract: A single, large-scale satellite access communication network may be configured as infrastructure for many small-scale subnets, wherein each subnet may be configured to serve a different organization (e.g. an SME) as a private network. Each subnet may be configured as a small star and/or mesh satellite data access network from the end-user perspective, yet all subnets may be configured to be part of the total large-scale network and share satellite bandwidth resources. Such configuration may yield significantly higher bandwidth efficiency, lower operation and equipment costs, minimized latency and ease of network operations for each of the small organizations sharing the large-scale network.

Abstract: A method for controlling gain in a wireless repeater includes using two or more gain control metrics indicative of stability of the repeater, at least two of the gain control metrics having different integration lengths, where the integration length is the sum of the coherent integration time and the non coherent integration time, and controlling a variable gain value of the repeater based on one or more of the selected gain control metric(s) where the gain control metric(s) to use is selected based on the stability of the repeater.

Abstract: Briefly, in accordance with one or more embodiments, a MIMO repeater turns off one or more transmitters of the MIMO repeater if there is no mobile station in the coverage area of the MIMO repeater to reduce noise enhancement on a MIMO network. If there is a repeater in the coverage of the MIMO repeater, the MIMO repeater turns off or keeps off its transmitters that do not have a sufficient channel quality in a respective antenna path, and turns on its transmitters having a sufficient channel quality in the respective antenna path transmits uplink signals from the mobile station via the turned on transmitters to further reduce noise enhancement by not using transmitters that do not significantly contribute to signal quality.

Abstract: A cellular repeater and method of operating a cellular repeater are disclosed. The cellular repeater includes a variable-gain donor antenna adapted to communicate with a base station and a variable-gain server antenna adapted to communicate with a mobile device. A signal from a selected base station selected from one or more available base stations that are available to the cellular repeater is measured at the donor antenna. The gain of the donor antenna is adapted to maximize a signal level of the signal received at the donor antenna from the selected base station. A calibration signal from the server antenna is measured at the donor antenna to determine a radio frequency isolation between the donor antenna and the server antenna. The gain of the server antenna is adapted to maximize the radio frequency isolation between the donor antenna and server antenna.

Abstract: In a radio communication system including a base station apparatus 10, a relay station apparatus 20 that receives a signal transmitted from base station apparatus 10 and re-transmits the signal to terminal apparatuses, a terminal apparatus 30 that directly receives the signal transmitted from the base station apparatus and a terminal apparatus 32 that receives the signal transmitted from base station apparatus 10 via relay station apparatus 20, base station apparatus 10 sets the transmission power of a signal addressed to terminal apparatus 30 high and the transmission power of a signal addressed to terminal apparatus 32 low, adds up the signals and transmits the resultant signal.

Abstract: A broadcast message transmission method of a relay station in a multi-hop relay network, which can be applied to a non-transparent centralized scheduling multi-hop relay network, includes that a base station transmits a message to be broadcasted to the relay station, the relay station returns an acknowledgement header to the base station after it has received the message, the base station transmits a message indicating the bandwidth allocation of the downlink to the relay station periodically after it has received the acknowledgement header for indicating the downlink bandwidth that the base station initiatively allocates to the relay station, and the relay station transmits broadcast messages to a terminal or a lower relay station in the downlink bandwidth.

Abstract: A method of and system for calibrating a repeater in a wireless communications system are provided. The one or more calibration parameters for the repeater are derived from (a) time measurements derived from one or more signals relayed by the repeater and received at a plurality of different measurement positions, and (b) the positions of the measurement locations. In one application, the one or more parameters are used in determining the positions of subscriber stations in the wireless communications system.

Abstract: A network architecture for underground communication using redundant interconnected communication systems utilizes an aboveground master control station to send a status request message to a belowground gateway. The gateway may then, in turn, broadcast a status request message to a plurality of communication hubs located throughout an underground region using each of a plurality of potentially available communication systems. In the event that one of the communication hubs fails to respond over the then-current communication system, the master control station may switch the current communication system being used to a truly available system.

Abstract: A transmission power calibrating method and a system are provided for a wireless apparatus. The wireless apparatus are controlled by a computer host to be tested at several channels and gains, and a simplified transmission power calibration table is established accordingly. The simplified transmission power calibration table is compared with each of complete transmission power calibration tables in a database. A match is detected between a first complete transmission power calibration table and the simplified transmission power calibration table. When the match is detected, a mapping table is obtained from the first complete transmission power calibration table and stored in a memory of the wireless apparatus. When the match is not detected, the wireless apparatus is controlled by the computer host to establish a second complete transmission power calibration table from which the mapping table is obtained and the mapping table is stored in the memory of the wireless apparatus.

Abstract: A disclosed radio relay apparatus receives signals from a transmitter via multiple receive antennas and transmits relay signals derived from the received signals to a receiver via multiple transmit antennas.

Abstract: A method for forwarding data in forwarding networks includes: acquiring a signal transmitted from a source node to a target node in the forwarding network; selecting an antenna which is closest to the target node or a subordinate forwarding node, according to a corresponding relationship between antennas and nodes in coverage areas of the antennas; sending the signal to the antenna selected through wire transmission media; and transmitting the signal by the antenna selected. An apparatus for forwarding data and a forwarding network are disclosed as well.

Abstract: Provided is a mobile communication system capable of eliminating the use of a control channel for transmitting specific area information and suppressing the overhead caused by a frequency change process for a mobile station to receive the specific area information. In the mobile communication system, a relay station (20) has a coverage area (21) (specific area) and relays and transmits, in the coverage area (21), a signal received from a base station (10) to a mobile station (30). The relay station (20) adds, to the signal received from the base station (10), the offset of any of a frequency offset, a time offset, and a power offset depending on a risk indicated by risk information in the coverage area (21) (specific area) and transmits the signal after the addition of the offset to the mobile station (30) located in the coverage area (21).

Abstract: A mobile satellite transmission/reception apparatus and a communications route control method using the same are disclosed. The mobile satellite transmission/reception apparatus comprises: a first antenna unit configured to receive a signal along a first communications route; a second antenna unit configured to receive a signal along a second communications route; and a data processor configured to compare cyclic redundancy check (CRC) values with respect to packet streams of signals respectively received by the first and second antenna units, and change communications route to one of the first and second communications routes if packets having the same CRC value are detected.

Abstract: A report message may be transmitted with collaborated information related to the occurrence of an emergency event. A plurality of devices, such as mobile communications devices, that are out of range of a communications network can communicate via direct communication, such as device-to-device communication, to corroborate characteristics that are indicative of an occurrence of an emergency event. Information related to the occurrence may be collaborated amongst the plurality of devices. A transmitting device, which may be one of the plurality of devices that corroborates characteristics or collaborates information, may generate and transmit the report message comprising the collaborated information. A receiving device may provide the message over a communications network, or the report message may continue to be handed off between devices capable of direct communication, the message eventually reaching a device that is within range of the communications network.

Abstract: The present invention relates to a method and apparatus for requesting a base station of emergency call connection within the shortest time regardless of location or channel status of a mobile station in a mobile communication system. When the mobile station requests an uplink to connect emergency call, the base station establishes a communication path of mobile station-relay station-base station if signal quality of the mobile station is not better than signal quality transmitted through the relay station, whereby ranging or transmission of emergency data is prevented from being repeated under poor channel status, so as to enable a prompt emergency rescue service.

Abstract: A relay station for relaying a radio communication between a radio terminal and a base station includes a relay standby unit configured to, in a relay standby state, receive a connection request transmitted from the radio terminal to the base station in response to broadcast information from the base station; a connection request detector configured to, in a relay standby state, detect the connection request transmitted from the radio terminal to the base station; and a relay operation unit configured to relay a radio communication between the radio terminal and the base station when the relay station shifts from the relay standby state to a relay operation state in response to the connection request detected by the connection request detector in the relay standby state.

Abstract: In a relay based wireless communication system, a method for transmitting an uplink backhaul sub-frame of a relay node includes obtaining scheduling information for an uplink backhaul sub-frame through a downlink backhaul control channel from a base station, and performing a rate matching and mapping of data by regarding at least one predefined symbol as a blank symbol. The predefined symbol is located at a front part or a rear part of the scheduled uplink backhaul sub-frame. The transmitting method further includes performing a multiplexing of the uplink backhaul sub-frame, and transmitting the multiplexed uplink backhaul sub-frame. This method can eliminate an overlap of transmission and reception timing in a relay node due to an RF transmission/reception switching time delay. Also, the method can make better use of wireless backhaul resources and minimize an influence on conventional systems by offering the compatibility with conventional uplink and downlink sub-frame structures.

Abstract: The invention relates to a single-port signal repeater. The repeater is connected in parallel to the communication means (3), on which only one access point (5) is needed. The repeater (4) comprises an amplifier, a hybrid circuit and a feedback and increases the range and transmission capacity for communications made on a conducted medium without the drawbacks of traditional repeaters, which have to interrupt the line and need two access points to the channel.

Abstract: A connection destination base station determination device is disclosed that includes: a storage part configured to store information indicating a radio base station that has transmitted a signal received with intensity at or above a certain level in a mobile terminal, and information indicating the amount of available resources in the radio base station; a selection part configured to select, of radio base stations having the amount of available resources greater than or equal to the amount of resources requested by the mobile terminal, a radio base station different from a radio base station having the largest amount of available resources as a connection destination radio base station; and a notification part configured to notify the selected radio base station that the mobile terminal is to be connected thereto.

Abstract: This invention provides a type of method used for providing channel aware relays in enhanced relay clusters. This method is based on the Centralized Cluster Relay Implementation Proposal, and is implemented by transferring MMR-BS channel information based functions to RS. Specifically, in this invention, RS receives authorization from the MMR-BS to receive the channel information from the MS or next single-hop RS point within its single-hop range, and, after performing applicable channel aware relays, reports the processing result to MMR-BS; MMR-BS configures the signal according to the processing result and joins RS to transmit the control signal to the cluster MS. Using the method provided by this invention can reduce the channel overhead between MMR-BS and RS, and at the same time ensure that the RS composition is simple, and the production costs are low.

Abstract: A radiocommunication network includes at least one communication station (GW) adapted to exchange data by radio with radiocommunication terminals (T1-T5). This network is adapted to use a data transmission method wherein, each time a source radiocommunication terminal (T1) wishes to transmit data to its communication station (GW), the identifier of at least one active neighbor relay communication terminal (T2, T3) is determined in the source terminal (T1) in order to transmit signals representing the data to be transmitted by radio to each relay terminal so determined so that it relays them to the communication station (GW).