Abstract: A relay station is provided for use in a wireless communication system. The wireless communication system includes a plurality of base stations communicatively coupled to a backhaul network and at least one mobile station. The relay station is shared by at least a first base station and a second base station. The relay station includes a transceiver, a controller and relay circuitry. The transceiver transmits signals to and receives signals both base stations and a mobile station. Signals transmitted to the base stations include a single preamble, MAP and FCH. The controller is electrically connected to the transceiver and is operable to measure a signal quality of the mobile station while connected to the first base station. The relay circuitry is electrically connected to the controller and is operable to conduct a phased handoff from the first base station to the second base station based on the signal quality.

Abstract: A method and system for wireless communication in which a plurality of media access control (“MAC”) packet data units (“PDUs”) corresponding to a plurality of wireless communication connections are received. The plurality of MAC PDUs is grouped into a relay packet and the relay packet is transmitted. Such grouping and transmission of the relay packet is performed by one or more relay nodes. The traffic control for the transmission can also be based on centralized or decentralized routing control and/or centralized or decentralized QoS control.

Abstract: A repeater that facilitates communication in a wireless environment comprises a scheduling component that analyzes a schedule relating to when communications are active in the forward link direction and when communications are active in the reverse link direction, the communications are subject to time division duplexing. An amplifier that amplifies received communications as a function of the schedule. The repeater can further comprise a configuration component that configures the amplifier to amplify the received communications in one or more of a forward link direction and a reverse link direction.

Abstract: The present invention discloses a Time Division Dual (TDD) system and a downlink feedback method for a relay link thereof. A relay station and a network side of the TDD system transmit uplink data and downlink feedback through relay subframes, wherein: one or more uplink subframes are selected from uplink subframes of a wireless frame as uplink relay subframes used for uplink data transmission, a downlink subframe is determined for each uplink relay subframe from downlink subframes of the wireless frame as a downlink relay subframe used for downlink feedback or new data indication, wherein the uplink relay subframes and the downlink relay subframes have a fixed timing sequence relationship; the relay station transmits uplink data to the network side through the uplink relay subframes, and receives the downlink feedback or new data indication from the network side through the downlink relay subframes corresponding to the uplink relay subframes.

Abstract: A relay node (34) which wirelessly communicates on a backhaul link over a first interface with a base station node (28) of a radio access technology network and which wirelessly communicates on an access link over a second interface with a wireless terminal (30). The relay node (34) comprises a transceiver (36) and a duplexer section (40). The transceiver (36) comprises a transmitter (42) and a receiver (44). The duplexer section (40) comprises plural transceiver ports (50, 52) and at least one antenna port (48). The relay node (34) is configured to provide a transmit signal from the transmitter (42) in a manner whereby a backhaul link portion of the transmit signal is conveyed through a different transceiver port (50) of the duplexer section than is an access link portion of the transmit signal.

Abstract: Dual mode radio for frequency division duplexing and time division duplexing communication modes. In some embodiments, dual mode radio for frequency division duplexing and time division duplexing communication modes includes a multi-mode communication unit for wireless communication, in which the multi-mode communication unit allocates access for a time based communication mode and a frequency based communication mode; and a processor configured to implement at least in part the multi-mode communication unit. In some embodiments, the time based communication mode includes a time division duplexing (TDD) communication mode, and the frequency based communication mode includes a frequency division duplexing (FDD) communication mode.

Abstract: A relay apparatus, comprises a reception section that receives real-time data, a monitoring section that periodically detects quality of a transmission path to be used for transmitting the real-time data toward a destination thereof, a determination section that determines a length of an interleaving cycle according to the quality of the transmission path, an interleaving section that interleaves the real-time data in the interleaving cycle having the determined length, and a transmission section that transmits the interleaved real-time data to the transmission path.

Abstract: To improve throughput by reducing the resource used for transmitting a parameter relating to retransmission control and decreasing the overhead of retransmission control signaling. In a case where a retransmission control method is employed in consideration of adaptive MCS control in which the encoding rate can be changed, the scheduling section sets the MCS in accordance with CQI notified from the communication counterpart apparatus. When transmission data is encoded, the RV parameter bit-number setting section sets the number of bits used for signaling the RV parameter to decrease as the encoding rate of the first transmission is decreased and sets the RV parameter based on the number of bits. For example, in a case where the encoding rate R is R>2/3, two bits are set. In a case where the encoding rate 1/3<R?2/3, one bit is set. On the other hand, in a case where R?1/3, zero bits is set.

Abstract: VoIP packets as many as the number transmittable within a time period equal to a window T1 minus a window T2 are transmitted to a radio IP network 10A in a case where the bandwidth of the radio IP network 10A is determined to be of a size not capable of transferring VoIP packets within a predetermined delay time period. In addition, a remaining number of VoIP packets excluding the number of VoIP packets transmittable within the time period equal to the window T1 minus the window T2 are transmitted to a radio IP network 10B.

Abstract: An access-terminal routing methodology is provided that may be used to enable a wireless, meshed backhaul between base stations using existing wireless-access resources (time, bandwidth, code-space, power), protocols, and base station infrastructure. Accordingly, the invention provides a means to extend the coverage of existing networks by adding standalone base stations without wired or specialized wireless backhaul.

Abstract: A duplex communication system having gate-implemented noise management is contemplated. The system may include a gate or other device sufficiently operable to facilitate managing upstream and downstream signaling so as to ameliorate noise funneling between communicating endpoints by selectively controlling communication paths through which noise may be propagated. Optionally, the system may be operably configured to facilitate this type of gate-implemented noise management for time domain duplex (TDD) and frequency domain duplex (FDD) communications.

Abstract: A two conductor hard wired communications link accepts an actual value of at least one parameter of interest from an environmental sensor in the form of data encoded on the conductors via current modulation. The sensor is mounted in location remote from an irrigation controller. A circuit connected to the sensor transmits an RF signal representing an actual value of a parameter of interest detected by the sensor. A data relay is connected to the hard wired communication link of the irrigation controller. The data relay includes a receiver that receives the RF signal, and circuitry configured to extract the actual value of the parameter of interest and emulate a predetermined set of physical and protocol properties of the hard wired communication link of the irrigation controller.

Abstract: Systems and methods for packet re-transmission in multi-hop wireless networks are provided. RLP packet retransmission only starts from the hop where L1 ARQ fails. This may result in an increased efficiency of radio resource utilization. In particular, the benefit may be greatest for implementations where the last hop is more unstable than the remaining hops. This is the case for the cellular downlink where the last hop is between a relay and a mobile terminal, and this hop is typically the most unstable. However, applications are not limited to this particular case. Any improvement in RLP recovery delay may be translated into an improvement in system capacity and per-terminal throughput.

Abstract: A system for repeating radio signals to the outside of a structure, from transmitters operating within a structure that normally prevents radio transmissions from propagating out of the structure. A system for repeating radio signals to the inside of a structure, from transmitters operating outside a structure that normally prevents radio transmissions from propagating into the structure.

Abstract: A repeater (200) facilitates wireless communication between a first communication device (100) and a second communication device (105) in a wireless network using a time division duplex protocol for data transmission. The repeater (200) includes a receiver (310, 315) for receiving a signal on either of at least two bi-directional communication frequencies simultaneously. A signal detector (362) is operatively coupled to the receiver (300, 310, 315) for determining if the signal is present on at least one of the two bi-directional frequencies. A frequency converter (320, 321, 323, 324, 360, 361) is for converting the signal present on one of the bi-directional frequencies to a converted signal on the other of the bi-directional frequencies. A transmitter (300, 325, 330, 335, 345, 350) is for transmitting the converted signal on the other of said bi-directional frequencies.

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: An apparatus and method for compensating for a phase error in a wireless communication system are provided. The apparatus includes a reception modem, a transmission modem, a Common Phase Error (CPE) compensator, a first channel estimator, a phase compensator, and a second channel estimator. The reception modem demodulates and decodes a signal received. The transmission modem encodes and modulates a signal for transmission. The CPE compensator compensates for phase errors of at least two symbols constituting a signal. The first channel estimator estimates channels for respective bursts. The phase compensator compares phases for the channels for the respective bursts with each other and compensates for a phase difference between at least two bursts. The second channel estimator estimates an interference channel.

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 wireless repeater with an antenna array determines the antenna weights to modify the spatial selectivity of the antenna array to reduce interference and improve the quality of signal reception. The antenna weights are determined using an error minimizing algorithm to minimize the error between a desired receive signal and a reference signal or an adaptive metric optimization algorithm to calculate adaptively antenna weights to minimize the signal-to-noise ratio of a desired receive signal.

Abstract: In one or more embodiments taught herein, a multi-band MIMO repeater is configured to translate normal wireless mobile bands into other frequency bands in the physical layer. An advantageous, multi-hop repeater chain includes two or more such repeaters, for propagating downlink signals from a base station, and for propagating uplink signals to the base station. Each such repeater may use paralleled homodyne structure transceivers for better SNR, spectrum combiners for uplink signal aggregation, spectrum separators for downlink signal de-aggregation, water mark signal inserters for optimization, and, among other things, spectrum analyzers for frequency band selection. In at least one such embodiment, a multi-hop repeater chain is configured for MIMO operation in an LTE Advanced or other MIMO network, to deliver high data rate over larger distances—e.g., further away from cell base stations.

Abstract: A repeater system for wireless communication system is disclosed forthwith. The repeater system uses an analog frequency converter and digital down and up converter in order to allow the processing of the repeated signal in a relatively low frequency (in the 30 MHz range) and in a digital form (rather than in analog form). The repeater system also provides a programmable multi-band filter which can identify and suppress out of band noises to increase the signal-to-noise ratio of the system.

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 method for selecting a channel for group communications in a conventional multi-channel communication system comprises receiving, for a plurality of channels in the multi-channel communication system, a talkgroup assignment list for the channels that identifies a set of talkgroups assigned to use the corresponding channels. A subscriber unit receives talkgroup assignment lists for multiple different channels, determines a desired talkgroup, and selects a channel assigned to the desired talkgroup using the received talkgroup assignment. The talkgroup assignment list is developed for at least one channel in the multi-channel communication system and identifies a set of talkgroups assigned to use the corresponding channel. The list is transmitted for the channel to a subscriber unit and is used by the subscriber unit to register with the system and affiliate with a talkgroup supported by the channel in the conventional multi-channel communication system.

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: Method and arrangement in a base station for sending control signals to a relay node. The relay node is configured to relay a data transmission from the base station to a user equipment in a subframe. The subframe comprises a first part, dedicated for downlink transmission, a second part dedicated for uplink transmission and a separating part situated between the first part and the second part. The base station, the relay node and the user equipment are comprised in a wireless communication network configured to operate according to the Time Division Duplex TDD principle. The method comprising transmitting data to the user equipment via the relay node in the first part of the subframe and transmitting the control signals, related to the transmitted data, to the relay node in the separating part between the first part and the second part of the subframe. Further, a method and arrangement in a relay node for receiving control signals from the base station are described.

Abstract: A system and method for transmitting communication data of a fixed line phone include acquiring the communication data of the fixed line phone, writing the communication data into a radio frequency identification (RFID) tag. The system and method further include establishing a communication between the fixed line phone and a handheld device using the RFID tag and a RFID reader of the handheld device, and transmitting the communication data in the RFID tag to the RFID reader.

Abstract: A node apparatus and an adjusting method of a quantity of nodes for a sensor network and a tangible machine-readable medium thereof are provided. The sensor network comprises a plurality of groups, wherein each group has a plurality of nodes. For each group, one of the nodes is set to be a gate node, and each node within the group transmits at least one data of itself to the corresponded gate node. Each gate node calculates a data aggregation time based on a data length per unit time of received data and a predetermined packet length, so that each gate node is able to adjust the quantity of nodes within the group thereof accordingly.

Abstract: A communication method of a source device according to an embodiment includes detecting a status of a first link directly connected from the source device to a destination device or a status of a second link connected from the source device to the destination device via a relay device, selecting any one of the first link and the second link based on a result of the detection, and transmitting data using the selected link.

Abstract: A monitor terminal transmits a monitor request command to monitor a repeater station designated by an operator to a monitor server via the Internet. The monitor server detects a monitor station located in the communication range of the designated repeater station from the content of the received monitor request command, and transmits a monitor instruction command to the detected monitor station via the Internet. The monitor station intercepts a radio signal during transmission from the repeater station to a radio communication device or vice versa. Upon reception of the monitor instruction command, the monitor station transmits the intercepted radio signal as monitor data to the monitor server. The monitor server transfers the monitor data to the monitor terminal. Upon reception of the monitor data transferred from the monitor server, the monitor terminal radio-transmits the received monitor data using a radio wave format receivable by the radio communication device.

Abstract: The present invention relates to the communication field and provides method and system for detecting repeater self-excitation and the repeater using the method and system. The method includes detecting an output power of an up link; judging whether the detected output power of the up link exceeds a threshold of self-excitation and, if so, adding a numerically-controlled attenuation to the up link accordingly; and judging whether the change in the output power of the up link is equal to that in the numerically-controlled attenuation and, judging whether the repeater is subject to a self-excitation according to the result of judgment regarding the change in the output power of the up link. The repeater self-excitation detecting method has the following advantages: 1. The self-excitation can be detected in time, thus avoiding had effect on the communication system; 2. The devices of repeater can be protected from being burned down; and 3. The cost incurred by the patrol inspection personnel can be reduced.

Abstract: A system for spatial division multiple access using a wireless repeater having a single transmitting/receiving antenna, includes: a base station that selectively transmits a plurality of data stream signals to the wireless repeater within an area through a multi-transmitting antenna for downlink; and at least one wireless repeater that forms a wireless repeater group within the base station area and repeats the data stream signals selectively transmitted from the base station to terminals.

Abstract: An ultrawideband radio transceiver/repeater provides a low cost infrastructure solution that merges wireless and wired network devices while providing connection to the plant, flexible repeater capabilities, network security, traffic monitoring and provisioning, and traffic flow control for wired and wireless connectivity of devices or networks. The ultrawidebande radio transceiver/repeater can be implemented in discrete, integrated, distributed or embedded forms.

Abstract: A system and method is provided to extend transmission range of a digital subscriber line (DSL). In one embodiment, a method includes receiving an input signal including a broadband data signal having a first signal strength and a telecommunication signal. The broadband data signal may be separated from the telecommunication signal. The broadband data corresponding to the broadband data signal may be regenerated, wherein the regenerated broadband data signal has a second signal strength which is greater than the first signal strength according to an embodiment of the invention. According to another aspect of the invention, the regenerated broadband data signal may be merged with the telecommunication signal into an output signal and the output signal may be transmitted over a subscriber line.

Abstract: Techniques for processing and forwarding transmissions by a relay are disclosed. In one aspect, an orthogonal distributed space-time frequency code (DSTFC) scheme that supports full-duplex relay operation and mitigates self-interference is disclosed. With the orthogonal DSTFC scheme, a source node transmits a same modulation symbol on two subcarriers in one symbol period. The relay obtains two received symbols from the two subcarriers and generates two output symbols based on these received symbols such that the output symbols and the modulation symbol are orthogonal at the relay and a destination node. In another aspect, a distributed Alamouti scheme is disclosed in which the source node transmits two modulation symbols on two subcarriers in each of two consecutive symbol periods. The relay obtains two received symbols from the two subcarriers in one symbol period and generates two output symbols based on the received symbols and in accordance with an Alamouti code.

Abstract: Disclosed herein is a method comprising using a first frequency for communication in a first direction with an infrastructure node and a second frequency for communication in a second direction with the infrastructure node during a normal operation phase in a wireless network. The method may further comprise reversing the frequencies used for the communication in the first and second directions with the infrastructure node during a link reversal phase.

Abstract: A method of communication comprising: at time=t: a first multiple antenna relay node decoding and forwarding a first STBC coded signal from a source node, and a first decoded and forwarded STBC signal from a second multiple antenna relay node, and a destination DSTTD receiver decoding the first STBC coded signal from the source node, and the first decoded and forwarded STBC signal from the second multiple antenna relay node; at time=t+1: the second multiple antenna relay node receiving a second STBC coded signal from the source node, and a second decoded and forwarded signal from the first multiple antenna relay node, and the destination DSTTD receiver decoding the second STBC coded signal from the source node, and the second decoded and forwarded signal from the first multiple antenna relay node.

Abstract: An apparatus for use in a relay wireless communication system is capable of bidirectional relaying with precoding. A Base Station (BS) includes a plurality of antennas. The BS can receive a relay signal that includes a transmit symbol vector of the BS and a transmit symbol vector of a Mobile Station (MS) from a Relay Station. The BS determines power difference values corresponding to all of symbol vectors available as the transmit symbol vector of the MS. The BS further determines the transmit symbol vector of the MS or per bit Log Likelihood Ratios using the power difference values.

Abstract: Provided is a united Adaptive Forward Error Correction (U-AFEC), including: an automatic gain control unit for controlling a gain of forward/backward relay signals; a switching unit for switching the forward/backward relay signals; a forward feedback signal detecting unit for detecting and updating a phase and a size of a feedback signal; a backward feedback signal detecting unit for detecting and updating the phase and the size of the feedback signal; a reverse feedback signal synthesizing unit for generating a reverse feedback signal based on the phase and the size of the feedback signal; a feedback signal removing unit for removing the feedback signal in the forward/backward relay signals and transmitting the forward/backward relay signals to the automatic gain control unit; and a control unit for removing the feedback signal in the forward/backward relay signals and controlling each constituent element.

Abstract: Embodiments herein relate to a repeater for time division duplexed signals. The repeater comprises, for each channel of the time division duplexed signal, a pair of access points. The first access point of the pair being configured in a first mode, and the second access point of the pair being configured in a second mode. The pair of access points being linked by a broadband serial wired data connection. The invention further relates to a multi-band regenerator and a network comprising such a repeater.

Abstract: Inventions relate to a field of radio communications and may be used for a creation of systems for cellular communications. The achieved technical result —an extension of a coverage area of a communication network. A system for cellular communication comprises a switch subsystem, a base station subsystem which are interconnected with a controller of base stations, mobile stations, K groups of line repeaters, a retransmission unit of radio channels. The base station comprises an antenna-feeder module of operating frequencies, a module of digital transceivers of operating frequencies, a digital unit of distribution and switching of messages, the retransmission unit of radio channels.

Abstract: Techniques are provided to determine channel assignments for wireless access point (AP) devices in a wireless local area network (WLAN). From each of a plurality of AP devices operating at least one of a plurality of channels in the WLAN, wireless activity data is received that represents activity in each channel associated with signals of devices operating in the WLAN and associated with signals and energy from devices that are not operating in the WLAN as detected by the AP devices by receiving radio frequency energy in each of the plurality of channels.

Abstract: An irrigation system includes an irrigation controller, at least one environmental sensor and a vandal resistant data relay. The irrigation controller includes a two conductor hard wired communications link for accepting an actual value of at least one parameter of interest from an environmental sensor in the form of data encoded on the conductors via current modulation. The environmental sensor is mounted in a location remote from the irrigation controller. A circuit is connected to the environmental sensor for transmitting an RF signal representing an actual value of a parameter of interest detected by the environmental sensor. The vandal resistant data relay is connected to the two conductor hard wired communication link of the irrigation controller.

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: Systems and methods for packet re-transmission in multi-hop wireless networks are provided. RLP packet re-transmission only starts from the hop where L1 ARQ fails. This results in an increased efficiency of radio resource utilization. The benefit increases with a larger number of hops. In particular, the benefit is greatest for implementations where the last hop is more unstable than the remaining hops. This is the case for the cellular downlink where the last hop is between a relay and a mobile terminal, and this hop is typically the most unstable. However, applications are not limited to this particular case. The improvement in RLP recovery delay can be translated into an improvement in system capacity and per-terminal throughput. A short RLP recovery delay enables the possibility of a higher number of re-transmissions of lost RLP packets. This in turn translates into a higher target physical layer FER (frame error rate) being allowed which in turn translates into an increased system capacity.

Abstract: A radio communication system for a communication between a base station and a mobile terminal. The radio communication system repeats a signal transmitted from the base station at repeaters that are multistage-connected by a leaky coaxial cable. Each repeater converts a frequency of an input signal into a different frequency and outputs the frequency-converted signal to the leaky coaxial cable connected to the repeater. The repeaters are provided between the leaky coaxial cables connected in series.

Abstract: An apparatus for bidirectional communication between multi-nodes using a relay node receives 2M signals, encoded using a nested lattice code chain, from a base station and M user nodes in a predetermined time interval, estimates M pairwise lattice code sum signals between the base station and the M user nodes based on the nested lattice code chain with respect to the 2M encoded signals, encodes the M pairwise lattice code sum signals to broadcasting codewords to generate M encoded signals after the predetermined time interval has ended, and transmits the M encoded signals to the base station and the M user nodes.

Abstract: A display generating device includes a display screen generator generating a display screen showing connection status between each wireless communication device in a wireless network in which a plurality of the wireless communication devices operate in an autonomous and distributed manner, and a detector detecting an operation of changing connection status performed by a user via the display screen generated by the display screen generator, wherein, when the operation of changing connection status is detected by the detector, the display generating device performs a change process of reflecting the content of the operation of changing connection status.

Abstract: A method for determining isolation status of the RF repeater is provided. A modem in the repeater registers with a base transceiver station (BTS). Uplink output levels of a donor RF transceiver are calibrated and stored in the modem. The modem is synchronized to a BTS transmission received at the donor RF transceiver and the synchronization information is provided to a server RF transceiver of the repeater. Isolation detection and measurement can then be performed between donor transmit antenna and receive server antenna of the RF repeater and the automatic gain control parameter of donor RF transceiver and server RF transceiver are adjusted based upon the isolation detection and measurement value. The isolation and detection can be implemented in a co-processor coupled to the donor and server transceivers.

Abstract: Apparatus and method for supporting a relay service in a multihop relay wireless communication system are provided. The method includes setting Tx/Rx mode switch region information of a Relay Station (RS). A signal is sent to a Mobile Station (MS) traveling in a service coverage during a first interval of a DownLink (DL) subframe according to resource allocation information. The mode switch region information and a signal are sent over a second interval of the DL subframe. Accordingly, the RS can communicate with a Base Station (BS) with accurate synchronization.

Abstract: A relay node, time division duplex communication system and communication method are disclosed. The communication system comprises a base station, mobile stations and the relay node. The relay node will not be in receiving and transmitting state synchronously.