Abstract: A radio communication system of the present invention comprises a radio communication device which transmits or receives a first beacon signal and a second beacon signal. A beacon transmission radio communication device transmits the first beacon signal in a preset timing pattern P1, while a beacon signal reception radio communication device receives the first beacon signal in a preset timing pattern P2. The beacon transmission radio communication device transmits the second beacon signal upon a passage of a delay time period R which is shorter than a standby time period Q which is shorter than the timing pattern P1, after the standby time period Q has passed. The beacon signal reception radio communication device attempts to receive the second beacon signal according to a passage of the delay time period R which is shorter than the standby time period Q which is shorter than the timing pattern P2, after the standby time period Q has passed.

Abstract: A relay apparatus is disclosed for relaying a signal from a transmitter to a receiver in a MIMO (Multiple Input Multiple Output) based communication system, comprising: a power difference determination unit configured to determine a difference of reception levels between a direct wave and a relayed wave based on positional relationship among the transmitter, the relay apparatus and the receiver, the direct wave traveling from the transmitter to the receiver without the relay apparatus, the relayed wave traveling from the transmitter to the receiver via the relay apparatus; a gain determination unit configured to determine an amplification gain of the relay apparatus to make the difference smaller; and a transmitting unit configured to amplify the signal from the transmitter at the determined amplification gain and transmit the amplified signal to the receiver.

Abstract: Systems and methods are provided for automatically setting up an initial configuration of a wireless repeater and managing one or more wireless repeaters in a wireless local area network.

Abstract: A system for enabling communication utilizing a satellite communications network includes a mobile communication device and a satellite modem apparatus. A text message is generated at the mobile communication device and transmitted to the satellite modem apparatus using a short range wireless protocol. The satellite modem transmits the text message as a short burst data message to a satellite within the satellite communications system where it is routed to a receiver unit. The satellite modem apparatus does not include a processor. Instead, the mobile communication device includes a processor and program code for generating, transmitting, and receiving text messages, and for encrypting a text message, and/or compressing a text message to a size suitable for transmission via an L-band communications protocol from the satellite modem apparatus.

Abstract: The present application describes embodiments of methods and apparatuses that may be used to accommodate different reference symbol patterns. One embodiment of the method includes identifying overlapping resource element(s) in a resource block by comparing a first pattern of resource elements associated with first reference symbols to a second pattern of resource elements associated with second reference symbols. This embodiment also includes transmitting the first and second reference symbols in the overlapping resource element(s) when first and second antenna ports allocated for transmission of the first and second reference symbols in the overlapping resource element(s) are the same. Transmission of the first reference symbol in the overlapping resource elements is bypassed when the first and second antenna ports are different.

Abstract: An apparatus and method for supporting a communication service of a communication terminal having a relay function are provided. The method for supporting a communication service of a communication terminal includes verifying a current data transmission rate in a relay operation mode to determine a transmission power level of a down link, and relaying the communication service to the down link according to the transmission power level. The method and the apparatus for supporting the communication service of the communication terminal with the relay function may control transmission power such that the communication terminal may maintain data transmission rate with a suitable level.

Abstract: The present invention relates to a mobile communication system, and more particularly, to a repeater and a ranging method using the repeater. In the mobile communication system including the repeater, a ranging operation is performed so that data are transmitted to a base station regardless of whether a mobile terminal is within a repeater area. Accordingly, it is determined whether a ranging code received through a ranging flag is directly received from the mobile terminal or if it is received through the repeater. When the ranging code is transmitted to the base station through the repeater, the ranging operation of the mobile terminal is performed.

Abstract: An apparatus and method for supporting relaying in a wireless communication system are provided. The apparatus and method include a transmitting apparatus which acquires channel information between the transmitting apparatus and an RS, pre-encodes a transmission signal to be transmitted to the RS with the channel information, transmits the pre-coded signal to the RS, and acquires, upon receipt of a signal from the RS, a signal transmitted by a receiving apparatus by eliminating the transmission signal transmitted to the RS from the received signal. Accordingly, the apparatus and method improve system capacity gain without adding time resources.

Abstract: Disclosed are a radio terminal device and the like, which achieve an improvement in the accuracy of ranging between a UWB reader and a UWB tag regardless of whether an active method or a semi-passive method. In a terminal (300), a timing control unit (340) outputs, to a transmission amplifier (350), a control signal for performing on-off control such that on the basis of the reception timing of a pulse signal transmitted from a base station (200) and a representative value of a circuit delay time required from when a reception pulse signal is received until a transmission pulse signal generated in response to a detection signal of the reception pulse signal is transmitted, the transmission amplifier (350) amplifies a reradiation pulse generated in response to a detection signal of the pulse signal transmitted from the base station (200); and a re-reradiation pulse generated in response to a detection signal of the reradiation pulse.

Abstract: A device and a process which enable use of transmission diversity in transmission to a receiving station when wirelessly relaying wireless signals from a transmitting station to the receiving station. A reception antenna RA in a wireless relay device (RS) receives from the transmitting station such as a base station (BS) a signal in which data signals are respectively allocated to carriers at adjacent radio frequencies. The wireless relay device performs space frequency block coding (SFBC) of the received signal. Then, the wireless relay device transmits SFBC-encoded signals through two transmission antennas SA0 and SA1 to the receiving station such as a mobile station (MS).

Abstract: In a particular embodiment a VDSL repeater is disclosed. The VDSL repeater includes a first interface for receiving data from an IPTV network node; a second interface for sending data to an end user client device; and an amplifier in electrical communication with the first interface for amplifying data received on the first interface from the IPTV network node when a power supply voltage is present on the first interface, wherein the amplifier sends the amplified data received on the first interface to the second interface. In another aspect of a particular embodiment the VDSL repeater further includes a circuit that bypasses the amplifier when the power supply voltage is not present on the first interface. In another particular embodiment a method for amplifying a VDSL signal when a power supply voltage is present on the twisted pair using the power supply voltage is disclosed.

Abstract: An over the air repeater for enhancing wireless communication is provided. The repeater employs a system and method by which strong signals can be prevented from exceeding the repeater's uplink output limits while still providing full operational gain to any concurrently amplified weak signals, while adapting to time slot variations and optionally to frequency hopping variations. Power measurements are performed on each channel with resultant gain changes being performed on delayed versions of those same signals. Digital delay buffers are used to provide adequate processing time to make an accurate determination of the uplink signal levels of each RF carrier. The repeater alternatively monitors the downlink path from the donor base station to determine the frequencies to be processed on the uplink communication.

Abstract: A repeater environment is provided operative to deploy a feedback cancellation loop that is adaptively coupled with an antenna array such that a selected metric can be derived by deploying a selected filter bank operative to process the signal on a bin by bin basis and the derived metric can be applied to the antenna array and feedback cancellation loop combination to improve signal integrity and amplification. In an illustrative implementation, an exemplary repeater environment comprises, a transmitter, a receiver, an equalized feedback cancellation loop circuitry comprising a filter bank, the cancellation loop being operatively coupled to an antenna array. In the illustrative implementation, the feedback cancellation loop can receive signals as input from a cooperating antenna array and provide output signals such as a feedback leakage signal to a cooperating antenna array.

Abstract: A signal for relay is received from a first node. From a local memory that stores K transform matrices (K being an integer greater than one) is selected a transform matrix that is associated with a relay rank order. The matrices define an optimal tradeoff of diversity gain versus spatial multiplexing. The received signal is transformed using the selected transform matrix, and the transformed signal is relayed over a wireless channel to a second node. In a particular embodiment the received signal is an input symbol vector of N consecutive symbols (N being an integer at least equal to two) and the transform linearly combines the N symbols of the input vector according to the relay rank order. In various embodiments the first node may give the rank order, it may be mutually agreed via signaling among the various relay nodes, or it may be based on an intrinsically generated random number.

Abstract: A repeater circuit, such as a clock regeneration and multiplication circuit, is described. In this repeater circuit, a clock multiplier unit (CMU) generates an internal clock signal based on a forwarded clock signal, which is received on a link. Furthermore, a phase interpolator (PI) in the repeater circuit provides the output clock signal based on the forwarded clock signal and the internal clock signal. Note that the CMU and the PI filter reduce the cycle-to-cycle jitter in the forwarded clock signal and the internal clock signal, and that the output clock signal has a phase that is a weighted average of the phases of the forwarded clock signal and the internal clock signal. In addition, the relative weights of the forwarded clock signal and the internal clock signal (i.e., the amount of phase averaging and jitter filtering) may be adjusted based on a position or location on the link.

Abstract: Systems and methodologies are described that enable serving cell selection in a wireless network with a multiple antenna repeater operable to support MIMO communications. In one example, a repeater using orthogonal frequency division multiplexing on the downlink can be equipped to receive, by one or more receive antennas, one or more signals using one or more radio frequency (RF) isolation schemes. The repeater can further be equipped to amplify and delay the one or more signals using one or more combination schemes. Moreover, the repeater can be equipped to transmit, by one or more transmit antennas, the amplified and delayed one or more signals, wherein at least one of the one or more receive antennas or the one or more transmit antennas includes two or more antennas.

Abstract: A communication system has a communication controller for multiplexing and transmitting a power supply voltage and an audio signal to be played back by a plurality of channels, and a plurality of communication adapters which start in response to reception of the multiplexed/transmitted power supply voltage, and play back the audio signal using a playback device. The communication controller includes an audio data modulation circuit configured to modulate audio data by shifting, based on a first modulation ratio, a modulation carrier clock for modulating the audio data and a data transmission rate for transmitting the audio data in order to set a command transmission frequency bandwidth, and a command data modulation circuit configured to modulate command data by shifting, based on a second modulation ratio, a modulation carrier clock for modulating the command data and a data transmission rate for transmitting the command data in the command transmission frequency bandwidth.

Abstract: Techniques are generally described for estimating a communication channel using wirelessly transmitted and retransmitted signals, each transmitted at a different power ratio. An example wireless communications system may include a base station, a relay station and a wireless device. The base station may include a transmitter configured to transmit a first signal, wherein the first signal includes pilot and data symbols with a first power ratio. The relay station may include a receiver configured to receive the first signal, and a transmitter configured to retransmit the first signal as a second signal, wherein the second signal includes pilot and data symbols with a second power ratio. The wireless device includes a receiver configured to receive the first and second signals, i.e. the transmitted and retransmitted pilot and data symbols having the first and second power ratios are received, and estimate a communications channel from the received signals.

Abstract: Provided is a modulating apparatus and method of an on-channel repeater. An object of the present invention is to provide a modulating apparatus of an on-channel repeater for reducing time delay by configuring and up-sampling a baseband signal, filtering the up-sampled baseband signal with an Equi-Ripple (ER) filter or in a window method, and converting the filtered baseband signal into an RF signal. The modulating apparatus includes: a baseband signal configuring unit for configuring a baseband. signal by combining an input field and a segment sync signal; a pilot adding unit for adding a pilot signal to the baseband signal; a filtering unit for filtering the baseband signal with the pilot signal; and an RF up-converting unit for up-converting the filtered signal into an RF signal. The present invention is used to form an on-channel repeating network in a transmitting system including a digital TV broadcasting system.

Abstract: A communication apparatus may include a demodulation unit, a waveform memory unit, a decoding unit, an encoding unit, a modulation unit, and a transmission unit. The demodulation unit demodulates a received signal to create a demodulated signal. The waveform memory unit stores the demodulated signal and a waveform of the demodulated signal. The decoding unit decodes the demodulated signal to create a decoded signal. The encoding unit encodes the decoded signal to create an encoded signal. The modulation unit modulates one of the encoded signal to create a modulated encoded signal and the demodulated signal to create a modulated demodulated signal. The transmission unit transmit one of the modulated encoded signal and the modulated demodulated signal according to a reception state of the received signal.

Abstract: Systems, methods, and computer-readable media for exploiting buffers in cognitive multi-relay systems for communicating delay sensitive application are presented herein. A secondary receiver device can select a first proximate relay station based on an assessment of communication links that extend from the first proximate relay station to the secondary receiver, and a secondary transmitter device that selects a second proximate relay station based on an evaluation of communication links that extend from the secondary transmitter and the second proximate relay station, wherein the first proximate relay station is employed by the secondary receiver device to communicate with the secondary transmitter device and the second proximate relay station is utilized by the secondary transmitter to communicate with the secondary receiver.

Abstract: The invention provides a mechanism for automatically setting reverse link gain or power for a repeater (120) used in a communication system (100) through the use of the reverse link power control of a built-in wireless communications device. By embedding a wireless communication device (430, 630, 700) inside the repeater and injecting reverse link signals of the embedded device into the reverse link of the repeater (124A, 124B), the gain of the repeater is maintained relatively constant. The embedded WCD can also be activated on a periodic basis to make calls and utilize reverse link power-control to calibrate or re-calibrate the gain of the repeater, making it a power-controlled repeater.

Abstract: Embodiments disclosed herein relate generally to digital transponders.

Abstract: The present disclosure relates to an active antenna array for a mobile communications network. The active antenna comprises a base band unit coupled to a base station, a plurality of transceiver units and at least one link. The plurality of transceiver units is terminated by at least one antenna element. The at least one link couples individual ones of the plurality of transceiver units to the base band unit 10. The at least one link is a digital link and is adapted to relay an individual transmit signal concurrently and in synchronisation with a transmit clock signal. The present disclosure further teaches a method for relaying radio signals in a mobile communications network. The present disclosure further relates to a computer program enabling a computer to manufacture the active antenna array of the present disclosure and to execute the method of relaying radio signal in a mobile communications system.

Abstract: The present invention relates to a method and an apparatus for transmitting and receiving data in a relay communication system. The method and the apparatus allocate resources by dividing backhaul link resources into plural partitions, and then transmit and receive data.

Abstract: A synchronization method of a radio repeater includes: using a first signal, a second signal, and a received signal including the first signal and the second signal to calculate correlation values of the first signal and the second signal; using the first signal correlation value, the second signal correlation value, and the power value of the received signal to output normalized correlation values; subtracting the normalized correlation value of the first signal and the normalized correlation value of the second signal; and detecting a start interval of the second signal based on the subtraction result and outputting a synchronization signal to synchronize the radio repeater.

Abstract: An interface module (4) for a unit (1, 2) which is designed to transmit and/or amplify essential communication signals inside an antenna distribution system (29) is specified, said module comprising a first analog interface (6) for forwarding and receiving essential communication signals from mobile terminals (32), a second interface (7) for forwarding and receiving essential communication signals from the antenna distribution system (29), at least one signal path (9, 10) for forwarding the received communication signals between the two interfaces (6, 7), and a controllable digital unit (11) which incorporates the signal path (9, 10) and has means for digitizing incoming communication signals and for subjecting outgoing communication signals to analog conversion. In this case, the digital unit (11) is designed to identify essential communication signals in the digitized communication signals, to mask the remaining signals and to forward the essential communication signals.

Abstract: Described embodiments provide a method and system for signal compensation in a SERDES communication system that includes monitoring the quality of a data signal after passing through a transmission channel. The quality of the data signal is monitored with at least one of a BER calculation algorithm and a received eye quality monitoring algorithm. Variations in channel length of the transmission channel are compensated for by i) adjusting a length of transmission line delay of the data signal from the transmission channel, ii) comparing the data signal quality with a threshold for the adjusted data signal; and iii) repeating i) and ii) until the data signal quality meets the threshold.

Abstract: A semiconductor device including a pair of stacked semiconductor ICs capable of communicating with each other by wireless. Each IC has: a transmitter circuit operable to send, by wireless, transmit data together with a clock signal deciding a transmission timing, and arranged so that the wireless transmission timing is adjustable; a receiver circuit operable to receive data in synchronization with a clock signal received by wireless, and arranged so that its wireless reception timing is adjustable; and a control circuit operable to perform timing adjustments of the transmitter and receiver circuits based on a result of authentication of data returned by the other IC in response to data transmitted through the transmitter circuit, and received by the receiver circuit. This arrangement for near field communication between stacked semiconductor ICs enables: reduction of the scale of a circuit for communication timing adjustment; and highly accurate adjustment of the communication timing.

Abstract: A method and system for aggregate registration and transparent data notification to services during IMS registration. A network entity, such as Serving Call Session Control Function (S-CSCF) may receive an aggregate registration request that includes a plurality of service identifiers and associated service-specific data sets. The aggregate registration request is sent by a user agent or other similar program on behalf of a user. The network entity then sends a notification to each particular service of the plurality of services, including in each notification the service-specific data set for the particular service. The user may thus supply service-specific data to each service during IMS registration, obviating the need for the user to directly and separately contact each service for the purpose of supplying service-specific data.

Abstract: Communicating between stations over a shared medium comprises: receiving, at a destination station, a first waveform that includes one or more segments of a payload that originated from an origin station with a sequence of multiple segments, the one or more segments included in the first waveform having been transmitted over the shared medium by the origin station and by each of one or more repeater stations, and the first waveform indicating which of the sequence of multiple segments were not correctly decoded by at least one of the repeater stations; generating, based on the first waveform, acknowledgement information that specifies which of the sequence of multiple segments have been correctly decoded by the destination station; and transmitting a second waveform from the destination station over the shared medium, the second waveform including the acknowledgement information.

Abstract: A first aspect of the present invention relates to a wireless relaying network having a number of network nodes, including a transmitting node, at least one relaying node and at least one receiving node. Briefly, according to the present invention the transmitting node forms an OFDM-symbol and transmits a signal comprising the OFDM-symbol to the at least one relay node and directly to the receiving node. The relaying node receives, amplifies and transmits the symbol to the receiving node in such manner as to enable the relayed signal and the direct signal to be receive concurrently at the at least one receiving node to enable constructive interference of the OFDM symbol.

Abstract: The present disclosure may include a method for repackaging data in a communications system. The method may include receiving low-power RF data at a wireless relay device from one or more low power wireless devices and translating the low-power RF data at the wireless relay device into one or more translated packets. The method may further include synchronizing the translated low-power RF data with one or more wireless links and transmitting the synchronized low-power RF data to a host device. The method may further include receiving wireless communications from a host device, translating the parsing the wireless packets, synchronizing the translated packets with one or more low-power RF connections, and transmitting the synchronized packets to one ore more low-power RF devices. The method may further include managing the network topology of the communications system via commands to the wireless relay device.

Abstract: The disclosed invention provides apparatus and methods that can convert frequencies of time-encoded signals. In one aspect, a down-converter circuit includes low-pass filters, a switch, a time encoder, and an output low-pass filter. In another aspect, an up-converter circuit includes an analog or digital input time encoder, low-pass filters, a switch, an output time encoder, and a time-encoded band-pass filter. In yet another aspect, a complete receiver system is provided. The receiver system can operate effectively with signals in the radio frequency range.

Abstract: Wireless repeaters comprising antennae having high electrical isolation are presented. Multi-band antennae are placed on opposing sides of a conductive ground plane to achieve high electrical isolation, preferably higher than 30 dB. The antennae are preferably placed at a distanced from the ground plane that is less than 0.5 wavelengths of a frequency associated with frequency bands to which the antennae are responsive. The presented antennae system reduces the minimum amount of isolation required for stable operation.

Abstract: A frequency translating repeater (200) for use in a wireless local area network includes a cancellation unit. Canceller (402) is controlled by control (401) to provide an injection signal for canceling leakage in a receive signal path. Reference coupler (403) provides a reference signal from the transmit signal, injection coupler (404) injects a correction signal, and sample coupler (405) provides a sample for feedback. A processor (510) receives the sample signal through a detector (415). Although the present invention is intended for a frequency translating repeater, it has broad applications in radio transceivers in general. One specific application is with frequency division duplex (FDD) handsets or base stations utilizing CDMA technologies such as W-CDMA and IS-2000 or 1XEV-DV/DO.

Abstract: A repeater includes at least an adaptive equalizer able to equalize a received signa. An adaptation function that determines the optimal equalizer settings based on the received signal is either integrated in the repeater or closely associated with the repeater. The repeater also has the capability to mute the output signal under control of the adaptation logic, while receiving an input signal which is used to perform the adaptation function.

Abstract: A repeater circuit configured to duplicate or otherwise coordinate signal transitions between state conductors, such as for use in asynchronous communication systems. The repeater circuit may include a state node or other feature to facilitate enforcing or otherwise ordering transitioning of the state conductors.

Abstract: A method of monitoring at least one beam of a satellite, the at least one beam being directed at a body around which the satellite orbits, the method comprising monitoring the at least one beam using a monitoring satellite which orbits around the body.

Abstract: An apparatus and method for cooperative relay in a multiple-antenna wireless communication system based on relay stations (RSs) are provided. The apparatus includes a serial/parallel converter for dividing data into N number of streams, a channel estimator for calculating a first transmission rate at which a RS performing the cooperative relay can perform decoding and a second transmission rate at which all relay stations performing the cooperative relay can commonly perform decoding, and determining transmission rates for each of the N-number streams, and an adaptive modulation and coding (AMC) unit for encoding and modulating the N-number streams according to their respective transmission rates.

Abstract: Method and arrangement in a relay node, for cancelling self-interference. The relay node is connected to one or more reception antennas, which reception antennas are configured to receive wireless signals. The method comprises receiving an analogue input signal, converting each received analogue input signal into a digital signal, processing the digital signal, extracting a cancellation signal from each respective digitally processed digital signal, combining and filtering the extracted cancellation signals into a number of combined cancellation signals, converting each combined cancellation signal into an analogue cancellation signal, and subtracting each analogue cancellation signal from the analogue input signal.

Abstract: According to one embodiment, a protective relay performs the following steps. A/D converter 11 acquires an electric current of a power transmission line 4 via a CT 5. A computing part 12 performs various protection computations such as current differential computation using a current data measured at the end of itself and a current data measured at the opposite end. A transmitting and receiving circuit 13 transmits the current data of itself to the other protective relay 1 at the opposite end via a transmission path 3. A received level detection part 14 detects the received level of the transmission data that has been transmitted from the opposite end and received by the transmitting and receiving circuit 13.

Abstract: Embodiments of a system and methods for resource management and interference mitigation techniques for relay-based networks are generally described herein. Other embodiments may be described and claimed.

Abstract: A method of and system for distinguishing polarizations and information about the carrier signals transmitted from a repeating relay comprising encoding, using an encoder, a first data stream and a second data stream at a repeating relay, modulating, using a modulator, the first and second encoded data streams at the repeating relay, spreading, using a spreader, the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform, and transmitting the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization.

Abstract: A system and method for communications in communications systems with relay nodes are provided. A communications controller includes a communications control unit, a bearer control unit coupled to the communications control unit, and a mapping unit coupled to the bearer control unit. The communications control unit manages resources and schedules transmission opportunities, the bearer control unit manages radio bearers for relay nodes coupled to the communications controller, and the mapping unit provides a mapping of user bearers to radio bearers.

Abstract: A method of acquiring and repatriating satellite data representative of a zone in space, termed the target zone, and an instrument for acquiring and repatriating satellite data including a plurality of satellites (1, 100), a plurality of terrestrial receiving stations (50, 51, 52, 53, 54), the instrument includes, for each item of data received by a receiving station (50, 51, 52, 53, 54), termed the receiving station, originating from the space layer: elements for determining a receiving station (50, 51, 52, 53, 54) intended for storing this item of data, termed the receiving station competent in respect of this item of data, and a terrestrial digital network for routing this item of data from the station receiving this item of data to the receiving station competent in respect of this item of data.

Abstract: An asset tracking unit, system, and method. The asset tracking unit, system, and method may include at least one transceiver having communicative connections with at least one SATCOM network and at least one GPS network via at least one antenna, wherein tracking information for at least one asset associated with the at least one transceiver is received from the GPS network and is communicated to the SATCOM network, a first link that provides a multi-code one of the communicative connections between the at least one transceiver and the at least one SATCOM network, and a second link that provides a multi-channel one of the communicative connections between the at least one transceiver and he at least one GPS network. The unit system and method may additionally include at least one remote operations center remote from an asset to be tracked, wherein the asset to be tracked is geographically associated with the central processing unit.

Abstract: A method and system for relaying data in a mobile communication system are provided, in which a Relay Station (RS) configures a routing table using Link Quality Information (LQI) exchanged among Relay Stations (RSs) in a cell, determines a relay path referring to the routing table, measures the quality of a signal received from an Mobile Station (MS), determines whether to relay data received from the MS by comparing the measured signal quality with at least one of information regarding a data rate of the MS and a reference threshold, transmits a relay request message to a Base Station (BS), if the RS determines to relay the data received from the MS, updates the relay path, upon receipt of a relay response message accepting the relay request and broadcasting information from the BS, and relays the data received from the MS to the BS in the updated relay path.

Abstract: A retransmission apparatus for retransmitting information received from a base station to a reception apparatus includes: a reception unit configured to receive information regarding a plurality of layers from the base station; determining unit configured to determine retransmission control information including at least one layer to be retransmitted among the plurality of layers based on feedback information received from the reception apparatus; and a transmission unit configured to retransmit the at least one layer information to the reception apparatus based on the results of the determining unit.

Abstract: A device, referred to as a satellite grid, includes a plurality of reception and storage ground stations (5) provided with a storage unit (13), each station (5) including elements for receiving observation data from at least one satellite orbiting around the Earth. Each station (5) is connected to at least one digital network (15) and includes at least one management module so that the different stations cooperate together in order to provide a permanent and transparent shared access to the observation data coming from at least one satellite and stored in the different stations (5), wherein the satellite grid is adapted to be accessible and viewed as a single computer resource from any access point in the network (15).