Abstract: A method of allocating control information in a wireless communication system is provided. The method includes: allocating essential control information of a first system to a first sub-frame in a frame including a plurality of sub-frames each of which comprises a plurality of orthogonal frequency-division multiplexing (OFDM) symbols; and allocating essential control information of a second system to an nth sub-frame in a fixed position from the first sub-frame (where n is an integer satisfying n>1). Accordingly, in a frame supporting heterogeneous systems, essential control information can be fixedly allocated to a specific position while maintaining the number of system switching points, at which switching occurs between the systems, to one even if a radio resource allocation amount changes between the systems, and thus the essential control information that must be received by all user equipments can be effectively provided without the increase of overhead.

Abstract: Techniques are described for permitting uplink feedback for downlink transmission over downlink-only RF carriers to occur using uplink control channels belonging to another fully-configured RF carrier herein known as a primary carrier. Uplink feedback channels can be allocated for the downlink-only RF carriers in the uplink control regions of a fully-configured RF carrier immediately following the uplink control channels for the primary carrier are allocated. The uplink feedback channels for downlink-only RF carriers can be allocated based on global or local index number of each downlink-only RF carrier in sequential order based on ascending or descending sorting of the index numbers.

Abstract: A cognitive MANET system is disclosed that uses TDD (Time Division Duplexing) and TDMA MAC to maintain routes that allow delivery of adequate bandwidth for applications resulting in an efficient way of maintaining information on neighboring wireless terminals and access points by using a routing protocol that has a built in slot reservation algorithm.

Abstract: A phase-change memory (PCM) includes a matrix of storage cells, including at least a first group with at least one cell. Each cell includes a phase change material having at least a first resistance value and a second resistance value, such that the first group can have an identical message encoded therein in at least a first way and a second way. The memory also includes a controller configured to encode the identical message in the at least first group the first or second way, based on which way causes the least amount of writing cost, given current levels of the group. Another embodiment of memory includes a matrix of storage cells. Each of the storage cells has at least two levels, such that each of the storage cells can have an identical message encoded therein in at least a first way and a second way.

Abstract: A wireless communication system broadcasts using Frequency Modulation (FM) in a Very High Frequency (VHF) band. In the system, base stations exchange wireless communications with user devices including user media requests and the requested media. A control system processes the user media requests to identify media streams for individual base stations. The individual base stations wirelessly broadcast the media streams identified by the control system using FM in the VHF band. The base stations wirelessly notify the user devices of the media stream FM broadcasts.

Abstract: A wireless communication device and a method of re-establishing a connection with a WPAN master device is presented. The method includes detecting that a first master station of a WPAN session which includes the first master device and one or more stations becomes unavailable, activating a master station application to become a second master station and sending one beacon to notify the stations of the session about the second master station connectivity parameters.

Abstract: An Ethernet physical layer device using time division duplex. A time division duplex frame can be defined with uplink and downlink transmission periods. These defined uplink and downlink transmission periods can be adjusted based on bandwidth and latency considerations on the network link.

Abstract: A method and system of communication capable of expediting a calibration process which requires a data bus, multiple user nodes connected to the data bus, and data frames for data transmission that each include a data field and/or a control field and a check sum field. One user has a high-precision clock generator, and the remaining users have a clock generator having a lower precision. The users having the lower precision clock generator calibrate the lower precision clock generator to a system clock signal of the data bus, taking into account information contained in received calibration messages already present on the data bus. Expedited calibration requires the system clock signal period to be set according to a series of measurements and uses any given messages transmitted via the data bus as calibration messages, thus conserving bandwidth on the data bus.

Abstract: This method includes: judging, for each certain combination of the source and destination nodes, for which the number of time slots to be allocated is equal to or greater than 1, whether or not certain time slots exist that are capable of forming a route from the source node to the destination node by unused links; for each certain combination judged, at the judging, that the certain time slots exist that are capable of forming the route by the unused links, identifying, for each certain time slot, a shortest route among routes formed by the unused links, calculating an evaluation value from the number of hops in the shorted route, an allocated priority associated with a corresponding certain combination and the number of used links in the corresponding certain time slot; and identifying a maximum evaluation value among the evaluation values.

Abstract: Methods and systems for TDD hum noise cancellation are disclosed and may include correlating a received audio signal to a time division duplexed (TDD) envelope signal, controlling a feedback signal based on the correlating, and cancelling a TDD noise signal via the feedback signal. The amplitude and delay of the feedback signal may be configured for controlling. A least mean square (LMS) filter may be utilized for the correlating and may include a finite impulse response filter. The TDD envelope signal may be generated on the chip or may be received from a source external to the chip. The feedback signal may be added to the received audio signal for the cancelling.

Abstract: Techniques for transmitting voice/data and packet data services such that packet data transmissions have less impact on voice/data transmissions. In one aspect, voice/data and packet data can be multiplexed within a transmission interval such that the available resources are efficiently utilized. In another aspect, the amount of variation in the total transmit power from a base station is controlled to reduce degradation to transmissions from this and other base stations. In a specific method for concurrently transmitting a number of types of data, a first data type (e.g., voice, overhead, and some data) and a second data type are respectively processed in accordance with first and second signal processing schemes to generate first and second payloads, respectively. First and second partitions are then defined in a transmission interval. The first and second payloads are time multiplexed into the first and second partitions, respectively, and the multiplexed payloads are transmitted.

Abstract: Providing wireless transmission, where in a first transmission mode, transmitting a plurality of frames using a first interframe spacing interval. When in a second transmission mode, transmitting the plurality of frames using a second interframe spacing interval, wherein the second interframe spacing is less than the first interframe spacing.

Abstract: A method, an apparatus, and a system for forming Time Division Duplex (TDD) Multi-Input Multi-Output (MIMO) downlink beams are disclosed herein. The method includes: generating a transmitting beam of a first data stream according to a Maximum Rate Transmission (MRT) criterion; and generating transmitting beams of other data streams except the first data stream, wherein the transmitting beams of other data streams are confined in a null space of the transmitting beam of the first data stream. Through the embodiments of the present invention, the Base Station obtains precise Partial Channel State Information by using only reciprocity without requiring feedback information, and thus the calculation is simplified and the rate of data streams is improved.

Abstract: Chase combining gains for receiving a scrambled broadcast channel can be achieved even when a portion of each received channel coded transmission contains a portion that varies. A set of possible difference values for this varying portion, such as for a system frame number, provides hypotheses, each having a corresponding probability. One or more of the hypotheses are selected by rank order for adjusting a corresponding received coded transmission so that two or more channel coded transmissions can be combined and blind decoded until one of the hypotheses are confirmed.

Abstract: A system and method for performing a beamforming training between heterogeneous wireless devices in a wireless network is disclosed. A number of time slots in a fixed-time period are assigned for transmit and/or receive sector training. The number of time slots assigned for transmit and/or receive sector training is based on an antenna configuration of a wireless station.

Abstract: A serial intelligent cell (SIC) and a connection topology for local area networks using Electrically-conducting media. A local area network can be configured from a plurality of SIC's interconnected so that all communications between two adjacent SIC's is both point-to-point and bidirectional. Each SIC can be connected to one or more other SIC's to allow redundant communication paths. Communications in different areas of a SIC network are independent of one another, so that, unlike current bus topology and star topology, there is no fundamental limit on the size or extent of a SIC network. Each SIC can optionally be connected to one or more data terminals, computers, telephones, sensors, actuators, etc., to facilitate interconnectivity among such devices. Networks according to the present invention can be configured for a variety of applications, including a local telephone system, remote computer bus extender, multiplexers, PABX/PBX functionality, security systems, and local broadcasting services.

Abstract: A channel time allocation and access control process for communication in wireless networks is provided. The channel time is divided into channel time blocks (CTBs), including one or more reserved CTBs and one or more unreserved CTBs. Schedules are implemented, wherein one or more periodic, equal-sized CTBs are reserved for isochronous streams. Dynamic CTB extension and truncation allow flexible channel time allocation.

Abstract: Methods and apparatuses for determining uplink receive signal path characteristics in a wireless communication system are disclosed. In one embodiment, a tower-top noise source (TTNS) is provided such that it is permanently affixed in close proximity to a receive antenna. The TTNS preferably has an output that includes a wideband noise signal having predetermined characteristics. The TTNS output is selectively connected to a receive signal path that includes a tower-top low-noise amplifier (TTLNA). An altered version of the wideband noise signal is received at the output of the receive signal path, and a characteristic of the altered wideband noise signal is measured.

Abstract: Embodiments of the present disclosure disclose a data transmission method which includes: sending, by an REC, a first part of downlink data of a downlink period to an RE before the downlink period arrives; sending, by the REC, a second part of the downlink data of the downlink period to the RE in the downlink period, where the second part and the first part constitute all downlink data of the downlink period; receiving, by the RE, the first part and the second part of the downlink data of the downlink period; and sending, by the RE, the first part and the second part as the downlink data through an air interface in the downlink period. Accordingly, the embodiments of the present disclosure also disclose a base station which can effectively improve utilization of transmission bandwidth of a CPRI interface and utilization of spectrum resources of the air interface.

Abstract: The present invention enables assignment to a terminal a sub-band having satisfactory communication quality. A reference-signal reception unit receives from a terminal a reference signal spreading over sub-bands. A communication-quality measurement unit measures the communication quality of each of the sub-bands on the basis of the reference signal. A sub-band assignment unit assigns one of the sub-bands to the terminal on the basis of the communication quality, for the terminal to perform wireless communication with the communication device. A reference-signal transmission unit transmits to the communication device a reference signal spreading over the sub-bands. A sub-band-assignment-information reception unit receives information on one of the sub-bands which is assigned to the terminal by the communication device on the basis of the reference signal. A data transmission unit transmits data to the communication device through the sub-band assigned to the terminal.

Abstract: A system and method are provided for enabling and performing scheduling for wireless devices supporting multiple users or devices. The system has a wireless subscriber device that is enabled to support multiple users or devices. The wireless system may operate accordingly to a wireless air interface such as WCDMA, CDMA2000, GSM, or other wireless technology. The wireless device has a message generator, which is configured to generate a multi-user message. The device transmits the multi-user message to the network. The network receives the multi-user message and begins to schedule network resources to the device as a device supporting multiple users.

Abstract: Radiocommunication device comprising a starter software module suitable to allow a simplified radio link of the radiocommunication device with a local radiocommunication network and allow a downloading, by this simplified radio link, of an update of a use software module that is contained in the radiocommunication device and that is suitable to enable a normal radio link to be set up.

Abstract: A mobile terminal is operated in a cellular communications system that comprises a base station operating in a time division duplex mode. The mobile terminal detects a downlink transmission from the base station and determines therefrom a future moment in time at which an end part of a downlink transmission just prior to a random access window will become detectable at the mobile terminal. An uplink random access transmission is begun at a moment in time that is before the future moment in time. The moment in time that is before the future moment in time can be a fixed amount of time before the future moment in time. If the mobile terminal is not near the edge of the cell, the base station may consequently receive only a partial uplink random access transmission, but this does not detrimentally affect performance.

Abstract: Devices and methods are disclosed which supplement a duplex frequency by providing one or more simplex frequencies and distributing data among them. Variations of the disclosed system include a server in communication with a communications device using a duplex channel. The server includes a scheduler that determines when it is no longer optimal to use the single duplex channel, and distributes data among the duplex channel and one or more simplex channels. Before sending this data, the server sends a schedule to the communications device through the duplex channel, so the communications device knows which bits of data are coming through which channels and at which times. A descheduler within the communications device receives the schedule and alerts the communications device to start receiving data on other simplex channels. The descheduler then puts the bits of data in order as they stream in across the duplex and simplex channels.

Abstract: Provided is a time division duplex communication apparatus capable of distinguishing interruption by a received interference wave at a reception time, interruption occurring upon completion of measurement of received power, and interruption caused by power leaked into a receiving system during transmission time. The time division duplex communication apparatus includes a variable attenuator 7 for adjusting power of a reception signal, an interruption factor detection unit 11 for detecting an interruption signal from the reception signal, a reception timing determination unit 21 for determining whether the interruption signal is due to a received interference wave, and an interference wave determination unit 31 for controlling the variable attenuator 7 when it is determined that the interruption signal is due to the received interference wave.

Abstract: A method of and apparatus for communication of conversational data signals, especially voice signals, between transceiver terminals over a radio link, especially a Bluetooth link, capable of full-duplex transmission of conversational data packets in alternate directions within a pair of time slots. Local conversational activity is detected at each of the terminals and conversational activity signals indicative of the detected local conversational activity are sent to the other terminal. Reception at either terminal is disabled if conversational activity signalling indicates absence of remote conversational activity, and transmission by either terminal is disabled in the absence of local conversational activity, saving power. Audible comfort noise may be generated at the terminal from a locally generated comfort noise signal if reception is disabled in response to the conversational activity signalling indicating absence of remote conversational activity.

Abstract: Disclosed is a wireless sensor network with a linear structure capable of bidirectional communication. The wireless sensor network includes a plurality of nodes linearly connected from a sink node to a terminal node by connecting each node to a single upper-level node and a single lower-level node, each node has an active period for transmitting/receiving data to/from its upper-level node and lower-level node, the active period includes a downstream duration for transmitting data/commands from the sink node to the terminal node and an upstream duration for transmitting data/commands from the terminal node to the sink node, and each of the upstream and downstream durations sequentially includes RX, TX, and ACK intervals, so that bidirectional communication between the sink node and the terminal node can be performed within a single active period.

Abstract: Providing wireless transmission, where in a first transmission mode, transmitting a plurality of frames using a first interframe spacing interval. When in a second transmission mode, transmitting the plurality of frames using a second interframe spacing interval, wherein the second interframe spacing is less than the first interframe spacing.

Abstract: In a communication system and a communication method using a TDD-OFDMA communication method, inter-carrier interference due to delay dispersion is prevented by suppressing the delay time within a guard interval.

Abstract: A data transmission technique where high speed data is transmitted differentially in a forward channel by way of a serial link, and relatively low speed data is differentially modulated onto the forward channel signal for transmission in a reverse channel via the link. By utilizing differential modulation in both forward and reverse channels, the resulting signal has a common mode voltage that is substantially constant, resulting in low EM!. The spectral content of the signal associated with the high speed data may be substantially non-overlapping with the spectral content of the signal associated with the low speed data. This facilitates the recovery of the high speed data and low speed data with minimal interference. The differential signaling lends itself for communicating data via an inexpensive medium, such as twisted wire pair or parallel PCB traces. The data transmission technique applies to various communication network topologies: point-to-point, daisy-chain, and point-to-multiple points.

Abstract: A system and method for mapping a combined frequency division duplexing (FDD) Time Division Multiplexing (TDM)/Time Division Multiple Access (TDMA) downlink subframe for use with half-duplex and full-duplex terminals in a communication system. Embodiments of the downlink subframe vary Forward Error Correction (FEC) types for a given modulation scheme as well as support the implementation of a smart antennae at a base station in the communication system. Embodiments of the system are also used in a TDD communication system to support the implementation of smart antennae. A scheduling algorithm allows TDM and TDMA portions of a downlink to efficiently co-exist in the same downlink subframe and simultaneously support full and half-duplex terminals. The algorithm further allows the TDM of multiple terminals in a TDMA burst to minimize the number of map entries in a downlink map.

Abstract: In TDD mobile networks, an incoming signal is received during a time period where no uplink communication takes place. The incoming signal is measured and analyzed to determine a noise level. Based on the noise level and on an uplink signal level from expected in a future uplink time slot, a gain for the automatic gain controller is set for use in future uplink communications. The gain is set to optimize the operation of an analog-to-digital converter.

Abstract: A method and apparatus for removing interference from a UpLink (UL) signal in a Time Division Duplex (TDD) system are provided. The method includes determining whether a section for receiving an UpLink (UL) signal from the MS overlaps with sections for sending a DownLink (DL) signal of neighbor BSs in service, the neighbor BSs sending the DL signal to another MS, when the UL signal section overlaps with the DL sections of the neighbor BSs, detecting DL transmit signal information from the neighbor BSs transmitting in the overlapping sections, and removing interference from the UL signal using the detected transmit signal information. Accordingly, the accuracy of detecting the signal from the MS can be raised without having to adopt the complex resource allocation scheme to avoid the interference of the neighbor BSs.

Abstract: A method for timing a full duplex pulsed wireless communication system between first and second transceivers is disclosed. At least one of the transceivers is mobile. A propagation time between the first and second transceivers is calculated. A pulse period of the first transceiver is set to be twice the propagation time divided by an integer. The second transceiver's pulse period is set to be equal to the pulse period of the first transceiver to enable the first and second transceivers to transmit and receive pulses with a substantially reduced risk of a collision between pulses transmitted from the first and second transceivers.

Abstract: A method for transmitting multiple antenna related information such as a multiple antenna receiver type and/or feedback overhead information to a base station and a terminal for supporting the same are disclosed. Since a size of feedback information is varied depending on the receiver type, it is necessary to properly allocate feedback channel resources suitable for characteristics of a receiving side. To this end, the multiple antenna related information is previously reported to the base station when the terminal initially accesses a network.

Abstract: A device and method for communicating by a mobile communication terminal in communication with a base station. The method according to an embodiment includes exchanging a frame of data with the base station. The frame of data includes a) a plurality of first subframes each having a first number of orthogonal frequency division multiple access (OFDMA) symbols, and b) a plurality of second subframes each having a second number of orthogonal frequency division multiple access (OFDMA) symbols different from the first number. A first and a last subframe each includes one of the plurality of first subframes.

Abstract: Methods and systems for sharing white space with primary services and other emerging services are provided. Signal distribution within a specified location, such as a dwelling, is performed using a home gateway that identifies unused white space, reserves such white space spectrum, and delivers data to one or more devices at the respective location using the reserved spectrum. Signalling between the devices and the gateway is performed over a shared signalling channel, which enables the gateway to advise the devices from where and when to receive data. The gateway also uses a common spectrum reservation OFDM symbol to advise the neighboring gateways of the local spectrum reservation.

Abstract: A method for controlling power in a communication system. The power control method in a base station includes receiving channel information from a plurality of mobile stations, and generating power control information of the mobile stations according to the received channel information; mapping the generated power control information to transmission fields of corresponding mobile stations according to allocation information of channels allocated to receive the channel information; and broadcasting to the mobile stations a message including the power control information mapped to the transmission fields of the corresponding mobile stations.

Abstract: The present invention comprises a method for communicating in a wireless communication network (1) comprising a number of cells (2.1, 2.2, 2.3) served by respective base stations (3). According to the proposed method, the following steps are performed: splitting up one at least one of a frequency bandwidth and a time interval allocated to the communication in at least a first part and a second part; using said first part for communication according to a first reuse scheme; and using said second part for communication according to a second reuse scheme.

Abstract: A system and method for transferring high-definition multimedia signals over four twisted-pairs. The system includes a multimedia source for transmitting multimedia data and source-to-sink management data to a multimedia sink over a first channel, a second channel and a third channel wherein the multimedia source is further being capable of transmitting a clock signal to the multimedia sink over a fourth channel; and a multimedia sink for transferring sink-to-source management data to the multimedia source over the fourth channel. The clock signal and the sink-to-source management data are simultaneously transmitted over the fourth channel. Each of the channels comprises a single twisted-pair, thereby the channels can bounded in a twisted pair type cable comprising at least one of: Category 5, Category 5e, Category 6, and Category 6e.

Abstract: Techniques are provided herein for a receiver protection circuit in a time-division duplex (TDD) system. The receive protection circuit has a first diode with an anode that is coupled to an input of a low-noise-amplifier (LNA) and a cathode that is coupled to a ground. A controller is coupled to the anode of the diode and is configured to generate a control signal for turning on the diode when the TDD system is in a transmission mode. A load is coupled to the diode such that a reflected transmit signal is shorted to the ground by the diode and the radio frequency energy carried in the reflected transmit signal is consumed by the load.

Abstract: A method for neighbor scanning in a wireless local area network having a station, a first access point (AP) to which the station is associated, and a second AP begins by generating timing information regarding a beacon signal sent by the second AP. The timing information is reported from the first AP to the station. The station schedules a time, based on the timing information, to listen for the beacon signal transmitted by the second AP.

Abstract: Some embodiments of the present invention are directed to a method and system for monitoring and recording voice from circuit-switched switches via a packet-switched network. A circuit-switched or VoIP recording system may record and/or live-monitor telephone calls by trunk and/or extension tapping over a packet-switched network. Alternatively, a circuit-switched or VoIP recording system may record and/or live-monitor telephone calls over a packet-switched network by activating the service observation feature of the circuit-switched switch either by feature code dialing or a computer telephony integration (CTI) link command.

Abstract: An apparatus including a port to transmit first frames and receive second frames over a communication channel, the port including a collision detect circuit and a duplex mismatch circuit. The collision detect circuit detects collisions on the communication channel between the first frames and the second frames. The duplex mismatch circuit declares a duplex mismatch when the communication channel was established without attempting auto-negotiation, the port is in a half-duplex mode, and the collision detect circuit detects a very late collision involving one of the first frames. The very late collision occurs after a predetermined amount of data has been transmitted in the one of the first frames. The duplex mismatch indicates that a full-duplex mode is used with respect to the second frames.

Abstract: Chase combining gains for receiving a scrambled broadcast channel can be achieved even when a portion of each received channel coded transmission contains a portion that varies. A set of possible difference values for this varying portion, such as for a system frame number, provides hypotheses, each having a corresponding probability. One or more of the hypotheses are selected by rank order for adjusting a corresponding received coded transmission so that two or more channel coded transmissions can be combined and blind decoded until one of the hypotheses are confirmed.

Abstract: A cellular communication system comprises a first communication network arranged to use a single cell identifier reuse pattern; a second communication network comprising a cluster of communication cells and arranged to use a common cell identifier reuse pattern for broadcast transmissions. The cellular communication system further comprises management logic (146) having broadcast mode logic (150) operably coupled to at least the second communication network; and a plurality of wireless serving communication units operably coupled to the management logic. The broadcast mode logic (150) applies the same common cell identifier to be used by the plurality of wireless serving communication units in transmitting broadcast communications across the cluster of communication cells in the second network.

Abstract: An optical signal return path system analog RF signals are sampled using a master clock frequency, and combined with digital data such as Ethernet data at a cable node. The cable node sends the combined signals on a return path over a fiber optic medium to the cable hub. The cable hub extracts an approximate in-frequency replicate of a master clock signal, and can use the replicate master clock signal to desample the digitized RF signals back to analog. The cable hub can further use the replicate of the master clock signal to serialize Ethernet data, and send the Ethernet data back to the cable node via an optical cable in the forward direction. Accordingly, a single master clock signal can be used on a CATV network for encoding/decoding, and transmitting a variety of data signals, which enhances the integrity and reliability of the data signals.

Abstract: Each base station transmits a TDM pilot 1 having multiple instances of a pilot-1 sequence generated with a PN1 sequence and a TDM pilot 2 having at least one instance of a pilot-2 sequence generated with a PN2 sequence. Each base station is assigned a specific PN2 sequence that uniquely identifies that base station. A terminal uses TDM pilot 1 to detect for the presence of a signal and uses TDM pilot 2 to identify base stations and obtain accurate timing. For signal detection, the terminal performs delayed correlation on received samples and determines whether a signal is present. If a signal is detected, the terminal performs direct correlation on the received samples with PN1 sequences for K1 different time offsets and identifies K2 strongest TDM pilot 1 instances. For time synchronization, the terminal performs direct correlation on the received samples with PN2 sequences to detect for TDM pilot 2.

Abstract: A relay transmission method and apparatus are provided. The method includes: configuring a subframe of a Time Division Duplex (TDD) relay frame for a subframe of relay link (S201), where the configuring the subframe of the TDD relay frame for the subframe of relay link includes: configuring a downlink (DL) subframe of the TDD relay frame for a DL subframe of relay link, and/or configuring the DL subframe of the TDD relay frame for an uplink (UL) subframe of relay link, and/or configuring a UL subframe of the TDD relay frame for the UL subframe of relay link; and performing relay transmission according to the subframe of relay link (S202). When data is transmitted, a subframe that can be used for relay link transmission is configured, data transmission performed by using relay link complies with inherent constraints of a TDD frame structure in the prior art, and coverage of a system using a TDD relay frame is expanded, thus improving the throughput.

Abstract: A method of reordering and pairing the set of elements, such as Control Channel Elements (CCEs), coming out of an interleaver for a channel, such as the Physical Downlink Control Channel (PDCCH), in such a way that power balancing provides almost equal impact on all Orthogonal Frequency Division Multiplexing (OFDM) symbols reserved for the control channel, while also taking the suggestions for the power balancing into account is provided. Corresponding apparatuses and computer programs are also provided.