Abstract: A first network device including a first calibration module to generate training signals for each of a plurality of subcarriers. The training signals are transmitted from the first network device to a second network device via antennas of the first network device using the subcarriers. A first steering module receives a first matrix for each subcarrier, which includes channel state information for each of the training signals received by the second network device, from the second network device according to a transmission schedule and generates a steering matrix based on the first matrix. The transmission schedule is predetermined or is transmitted to the second network device prior to transmitting the training signals. A first control module adjusts, based on the steering matrix, first beamforming weights associated with the antennas to direct first radio frequency signals to be transmitted toward the second network device.

Abstract: Disclosed are mobile communication devices and methods of a mobile communication device that determines that no response has been received within a predetermined period of time from a network to a transmission of an encoded data block in accordance with a commanded MCS. The device then determines an alternative MCS capable of coping better with variations in the radio environment with minimal damage or alteration than the commanded MCS and preemptively transmits the encoded data block in accordance with this more robust alternative MCS. In this way the mobile communication device does not continue failed attempts to transmit data in accordance with the commanded MCS. After the device receives notice of successful transmission of the encoded data block with the alternative MCS, the device will resume the use of the commanded MCS to transmit subsequent encoded data blocks.

Abstract: A per-layer and per-antenna uplink power control method for MIMO transmission of PUSCH in a Long Term Evolution-Advanced (LTE-A) system is provided. A transmit power for a plurality of transmit antennas is calculated based on a power control parameter received in a downlink. Uplink data is transmitted through the plurality of transmit antennas by applying the transmit power to each of a plurality of codewords.

Abstract: A base station in a wireless communication system and a method for controlling power by the same are provided. The method includes receiving channel state information from a mobile terminal, calculating information regarding a Modulation order Product code Rate (MPR) of the mobile terminal using the channel state information, and controlling transmission power for the mobile terminal according to the information regarding the MPR.

Abstract: A communication device comprising at least first and second antennas wherein a quality of communication between the communication device 2 and a further device 20 is assessed when using the at least first and second antennas 8, 10, 12 so as to select one of the at least first and second antennas for further communications between the communication device and the further device.

Abstract: A gating scheme in a wireless communication network is tuned according to the performance of the application used. This can mean that in some situations gating is not used at all while in other occasions gating is used where the cycle length, burst length, number of preambles and offset are adjusted. The performance is monitored and the gating is increased or decreased depending on the results of the monitoring and demands of the application. Furthermore, the gating scheme adapts to the current performance and is chosen to optimize performance in terms of system capacity. The monitoring also takes into account which of the gating cycles that needs to be changed. The algorithm is self tuning/configuring meaning that it will control the gating scheme to find and keep an optimal level for the used application.

Abstract: A communication method and apparatus for coordinated multi-point (CoMP) transmission, is provided. Sizes of codebooks for a plurality of base stations may be adjusted based on a status of channels between a target terminal and a plurality of base stations. The terminal feeds back, to at least one of the plurality of base stations, channel direction information (CDI) including a number of bits of feedback.

Abstract: Methods and apparatuses to select a transmit antenna in a mobile wireless device connected to a wireless network are described. The mobile wireless device monitors received signal characteristics through first and second antennas and switches antennas based on the monitored signal characteristics and on an assessment of the sufficiency of available transmit power headroom to accommodate data transmissions in the uplink direction. Sufficiency is determined based on one or more criteria including achievable data rate throughput, quality of service, grade of service, an amount of data buffered, an amount of resources allocated by the wireless network and a number of “power up” commands received by the mobile wireless device during a pre-determined time interval.

Abstract: A small base node such as a Home Base Node (HNB), or femto cell, may reduce its transmit power in order to prevent co-channel or adjacent channel interference, or to limit its coverage area. Once the power is set, the HNB signal to a served Home User Equipment (HUE) its transmit Common Pilot Channel (CPICH) transmit power for accurate path loss estimation. When this power is outside of the permissible range, the HNB adjusts other parameters (such as Random Access Channel (RACH) constant value) to compensate for the error in signaled CPICH power, and thus compensate in that process the error in determining path loss. Similarly, if the uplink sensitivity is adjusted, to prevent interference, parameters would also be adjusted and signaled to the HUE to reflect the link imbalance.

Abstract: Techniques for determining and reporting channel quality indicator (CQI) information are described. A user equipment (UE) may determine a transmit power per channelization code, POVSF, based on the available transmit power and a designated number of channelization codes. The UE may estimate SINRs of multiple transport blocks based on POVSF, determine CQI indices for the transport blocks based on the SINRs, and send the CQI indices to a Node B. The Node B may send multiple transport blocks to the UE based on the CQI indices. The Node B may send the transport blocks (i) with the designated number of channelization codes at POVSF or (ii) with a second number of channelization codes at POVSF, with the transport block sizes being scaled based on the designated and second numbers of channelization codes.

Abstract: Methods and apparatus relating to link power savings with state retention are described. In one embodiment, one or more components of two agents coupled via a serial link are turned off during idle periods while retaining link state in each agent. Other embodiments are also disclosed.

Abstract: Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a serving base station may send a message to a terminal to trigger short-term interference mitigation. In response, the terminal may send a message to request at least one interfering base station to reduce interference on at least one resource. Each interfering base station may determine a transmit power level to be used for the at least one resource and may send a pilot at this transmit power level. The terminal may estimate the channel quality of the at least one resource based on at least one pilot received from the at least one interfering base station. The terminal may send information indicative of the estimated channel quality to the serving base station. The serving base station may send a data transmission on the at least one resource to the terminal.

Abstract: A method and apparatus for providing multi-rate broadcast services in a wireless communication system are disclosed. The present invention takes advantage of the higher capacity of better channels by providing a certain data rate common to all users, while sending additional information to users with better channel conditions. A base station transmits a broadcast message including common information at a basic rate and additional information at a rate higher than the basic rate. The basic rate guarantees successful receipt by all WTRUs in a coverage area and the rate for the additional information is set such that only certain WTRUs with a channel condition above a threshold may decode the additional information successfully. The WTRU decodes the common information and subtracts the common information from received signals to decode the additional information. The additional information may be information supplementing the common information, such as video information.

Abstract: Techniques for determining and reporting channel quality indicator (CQI) information are described. A user equipment (UE) may determine a transmit power per channelization code, POVSF, based on the available transmit power and a designated number of channelization codes, e.g., by uniformly distributing the available transmit power across all transport blocks and all of the designated number of channelization codes. The UE may estimate SINRs of multiple transport blocks based on POVSF, determine CQI indices for the transport blocks based on the SINRs, and send the CQI indices to a Node B. The Node B may send multiple transport blocks to the UE based on the CQI indices. The Node B may send the transport blocks (i) with the designated number of channelization codes at POVSF or (ii) with a second number of channelization codes at POVSF, with the transport block sizes being scaled based on the designated and second numbers of channelization codes.

Abstract: Methods and systems are disclosed for transmitting data over a desired frequency tone in the presence of an interference that has an unknown magnitude that is substantially constant. In general, data symbols are transmitted in a null space of the desired frequency tone. The null space of the desired frequency tone is orthogonal to the desired frequency tone. As such, the data symbols transmitted in the null space of the desired frequency tone are not interfered with by the interference at the desired frequency tone regardless of the magnitude of the interference. The data symbols transmitted in the null space of the desired frequency tone can then be recovered by a receiver without estimation of or compensation for the interference at the desired frequency tone.

Abstract: Techniques for transmitting data with short-term interference mitigation in a wireless communication system are described. In one design, a first station (e.g., a base station or a terminal) may receive a message sent by a second station to request reduction of interference on at least one resource. In response to receiving the message, the first station may determine a first transmit power level to use for the at least one resource based on one or more factors such as a priority metric sent in the message, the buffer size at the first station, etc. The first station may send a power decision pilot on the at least one resource at a second transmit power level determined based on the first transmit power level.

Abstract: A power control method for interference alignment in wireless network having K transmitters and K receivers is provided. The method includes: receiving, performed by receiver n (n is an integer, 1?n?K?1), a power indication signal of transmitter n+1 from the transmitter n+1; determining, performed by the receiver n, power of transmitter n; and transmitting, performed by the receiver n, a power indication signal of transmitter n to the transmitter n, wherein the power of transmitter n is determined based on a residual interference of the receiver n, and the power indication signal of transmitter n indicates a minimum transmission power or a maximum transmission power of transmitter n.

Abstract: A system and method are provided for frequency domain peak power reduction on a plurality of orthogonal frequency divisional multiplexing (OFDM) signals in a communications system, wherein frequency domain processing of at least one OFDM signal carrier is iteratively performed to reduce peak power transmissions. OFDM signal carriers can include both in-band sub-carrier signals, and guard-band sub-carrier signals. Each iteration of peak power reduction takes as an input the frequency domain representation of the signal from the previous iteration that has been altered with respect to an error signal also represented in the frequency domain, determines an error signal (in the frequency domain), and subtracts this from the input to produce a further peak power reduced frequency domain signal. If there are no peaks above the configured peak power reduction threshold, then the signal passes through the FPPR iterations with no change.

Abstract: The present invention relates to a wireless communication system. More particularly, the present invention relates to a signal transmission method in which a terminal transmits a signal in a wireless communication system, said method comprising the steps of: checking the maximum transmission power (P_CC_MAX) for each component carrier of a plurality of component carriers, as well as the maximum transmission power (P_UE_MAX) of the terminal; calculating the transmission power for each channel to be simultaneously transmitted to a base station through one or more component carriers; independently adjusting the transmission power for each of the channels so as not to exceed the maximum transmission power (P_CC_MAX) and the maximum transmission power (P_UE_MAX); and transmitting a signal to the base station through the plurality of channels for which the transmission power is adjusted.

Abstract: A system and method of implementing an on-demand change of the RF power class of multi-carrier power amplifiers at a base station radio with minimal disruption of user service is disclosed. The power amplifiers providing signal diversity at said cell site and being able to operate at various RF power class levels. A first multi-carrier power amplifier with multiple RF Power Classes provides a main RF beam transmission at one sector of said cell site. A second multi-carrier power amplifier with multiple RF Power Classes provides RF beam transmission diversity to the main RF beam transmission. A switch operates to disable either the first or second multi-carrier power amplifier when an RF Power class change is required.

Abstract: The invention proposes a technical scheme (called as explicit feedback (used for feeding the information of downlink channels back to a base station at the user terminal of a wireless communication system, and a technical scheme for precoding the data transmitted to the user terminal based on the information of downlink channels feed back by the user terminal in the base station. The user terminal determines an approximately equivalent matrix of the transmission matrix of downlink channel, based on the transmission matrix of downlink channel, the number of downlink data streams, the spatial correlation matrix of multiple transmitting antennas in the base station and a predetermined codebook; then feeds the information concerning the approximately equivalent matrix back to the base station.

Abstract: Certain aspects of the present disclosure present physical layer metrics for supporting adaptive station-dependent channel state information feedback rate in multi-user communication systems. For certain aspects, the physical layer metrics may be calculated at the stations and communicated to the AP. For certain aspects, the metrics may be calculated at an access point utilizing information about channel characteristics of stations available at the access point.

Abstract: This invention has been accomplished in consideration of problems, and an object thereof is to provide a technology that enables a maximum transmit power suitable for each user equipment. This invention is a communication system, is characterized in deciding a maximum value of a transmit power of a user equipment by employing at least one of an access scheme and control information indicating a content of a communication control.

Abstract: There is described a method of controlling a basestation in a cellular wireless communications network, the method comprising, within the basestation, autonomously and dynamically adapting a maximum value for a total transmit power of the basestation, such that interference between the basestation and other access points in the vicinity is minimized.

Abstract: Systems and methods are disclosed for compensating for non-linearity of a power amplifier using space mapping based predistortion. In one embodiment, a transmitter includes a power amplifier that amplifies a power amplifier input signal, a predistorter that effects predistortion of the power amplifier input signal to compensate for a non-linear characteristic of the power amplifier using a space mapping based model of an inverse of the non-linear characteristic of the power amplifier, and an adaptation sub-system that adaptively configures the space mapping based model of the non-linear characteristic of the power amplifier. In one embodiment, the adaptation sub-system adaptively configures a space mapping based model of the non-linear characteristic of the power amplifier and adaptively configures the space mapping based model of the inverse of the non-linear characteristic of the power amplifier based on the space mapping based model of the non-linear characteristic of the power amplifier.

Abstract: A beam power source transmits a signal indicating power availability, receives a request for power in response, and beams power in response to the request.

Abstract: The transmission power is decreased in an appropriate manner, while suppressing the deterioration of the line quality to the minimum. A mobile communication terminal 1 controls the transmission power in response to a request given from a base transceiver station 2. When an average transmission power Wa that is an average value of the transmission power in a monitoring period Ta is smaller than a threshold value TH, mobile communication terminal 1 continuously controls the transmission power in response to the request given by the base transceiver station 2. When the average transmission power Wa in the monitoring period Ta is equal to or greater than the threshold value TH, the transmission power is controlled in a transmission power suppressing period Tb that follows the monitoring period Ta so that the average value of the transmission power becomes equal to or smaller than the threshold value in a control period Tc including the monitoring period Ta and the transmission power suppressing period Tb.

Abstract: In a telecommunications network including a mobile terminal and a base station associated with a plurality of antennas, with each antenna configured to transmit the signal with a time offset relative to the other antenna or antennas, an engine for controlling a signal to be transmitted wirelessly from the base station towards the mobile terminal, the engine being configured to receive one or more parameter measurements relevant to the mobile terminal; and use the one or more parameter measurements to adjust the time offset of at least one of the antennas in order to adapt the signal transmission dependent upon the mobile terminal's instantaneous circumstances. Ideally the engine is configured to receive the one or more parameter measurements relating to a plurality of different mobile terminals, and independently adjust the time offset for each of the plurality of different mobile terminals, depending upon the one or more applicable parameter measurements.

Abstract: In a wireless apparatus, a first receiver receives, from a wireless reception apparatus, a transmit beam pattern with better reception quality among transmit beam patterns of a transmitter switched to by a first switching unit. A generation unit generates a transmit beam pattern obtained by rotating a phase of the received transmit beam pattern. A second switching unit switches a transmit beam pattern of the transmitter to the received transmit beam pattern and the generated transmit beam pattern. A second receiver receives, from the wireless reception apparatus, the transmit beam pattern of a combination with better reception quality out of combinations of the switched transmit beam patterns and receive beam patterns switched to by the wireless reception apparatus. A setting unit sets a transmit beam pattern of the transmitter in the transmit beam pattern received by the second receiver.

Abstract: This invention discloses a method in a wireless communication network, the method comprises generating a first piece of feedback information by a first hub serving a user terminal, transmitting a second piece of feedback information to the first hub by a second hub, combining the first and second pieces of feedback information by the first hub to form a third piece of feedback information, and transmitting the third piece of feedback information to the user terminal.

Abstract: One aspect provides a method of controlling transmit power in a wireless device, wherein a desired transmit power is determined as a result of detection of a receive signal parameter. The method comprises detecting a desired maximum transmit power and generating a sequence of attenuation factors. The sequence is generated by monotonically increasing a variable at a controlled rate between a starting value and the maximum transmit power. The method further comprises using each attenuation factor in turn to: (a) reduce the measured value of the received signal power; and (b) reduce a determined desired value of the transmit power, where the transmit power is continually reduced as the variable is increased.

Abstract: A system can obtain an operational metric associated with the transceiver, determine a target figure of merit based on a compromise between a desired transmitter performance and a desired receiver, determine a current figure of merit based on the operational metric, and adjust the variable reactance component of the impedance matching circuit based on a comparison of the current figure of merit with the target figure of merit. Other embodiments are disclosed.

Abstract: A wireless device stores historical information for a prior access attempt and uses this information to lower the output transmit power for a current access attempt on an access channel. The historical information may include RF conditions for the prior access attempt, the performance for the prior access attempt, and a power value used for the prior access attempt. The power value may be a power adjustment or an initial power level. For the current access attempt, the wireless device obtains the historical information, determines the current RF conditions, and determines a power value for this access attempt based on the current RF conditions and the historical information. The wireless device determines the output power for each access probe based on the power value and other applicable parameters and sends each access probe at the determined output power. The wireless device updates the historical information upon completing the access attempt.

Abstract: A method of performing power headroom reporting, hereafter called PHR, for a communication device configured with a plurality of uplink component carriers or parallel PUCCH and PUSCH transmission in a wireless communication system is disclosed. The method comprises reporting power headroom information of at least one of the communication device, at least an uplink component carrier, and at least a power amplifier configured to the communication device, to a network of the wireless communication system when the PHR is triggered.

Abstract: A method and system for establishing a wireless connection between a portable computer system and a wireless network, particularly when the portable computer system goes out of coverage and a wireless connection needs to be re-established. The portable computer system has a main processor and a digital signal processor (DSP). The main processor is placed in a low power mode, conserving battery power. When the portable computer system goes out of coverage, broadcast channels used by the wireless network are scanned by the DSP instead of the main processor to identify channels that have sufficient signal strength for the wireless connection. Thus, the main processor remains in the low power mode. When the DSP identifies acceptable channels, it wakes up the main processor and identifies the channels having sufficient signal strength. The main processor then establishes a wireless connection using one of the channels identified by the DSP.

Abstract: A method and device of sending Buffer Status Reports (BSRs) are provided herein. The method includes: determining the type priority sequence of BSR by a user terminal, and selecting and processing one BSR based on the type priority. A user device is also provided. In the process of implementing the provided method and device, the terminal may select and process one BSR when the sum of the BSR qualified for triggering the sending and the BSR marked as pending is greater than one. The provided method and device may reduce resource waste because there is no situation that at least two BSRs sending processes are triggered at one time and at least two BSRs are sent at one time.

Abstract: A device and a method for controlling a transmission power in a mobile terminal are provided. The device includes an antenna set in an optimized state, a memory including a power control table that includes transmission power control data for satisfying a Specific Absorption Rate (SAR) standard in a state where efficiency of the antenna is optimized, a sensor for detecting a distance between the mobile terminal and a user, a controller for receiving distance data from the sensor and for outputting transmission power control data corresponding to the distance data by referring to the power control table, and a power amplifier connected between a transmitter and the antenna for controlling transmission power of a signal according to the transmission power control data and for outputting the signal to the antenna.

Abstract: Spatial discrimination information is fed back at both the multi-antenna transmitter and the multi-antenna receiver connecting a UE and cells within a CoMP measurement set. With the UE feeding back the transmitter and the receiver side spatial discrimination information of each cell-to-UE connection, the composite spatial CSI over multiple sites/nodes can be determined. The approach is applicable for UEs with single or multiple receiving antennas, and the spatial discrimination information can be wideband long-term or subband short-term. In some embodiments, the spatial discrimination information at the receiver side is derived from the actual spatial channel while receiver implementation is taken into account. The spatial discrimination information at the transmitter and at the receiver can be fed back using codebooks for MIMO precoding.

Abstract: An interference mitigation system randomizes transmissions to cell-edge users by carefully controlling the probability of transmission to these users, thereby creating a virtual fractional frequency system that does not require extensive frequency management and coordination across the network. In some embodiments, the interference mitigation system identifies severely interfered links and reduces the probability of transmission on these links, with the result being a reduced probability of interference.

Abstract: A method for indicating and interpreting robust MAC signaling, the indicating method having the steps of: checking whether a MAC-PDU contains control information; and if yes, providing an indication to use a robust configuration for a HARQ feedback transmission, and the interpreting method having the steps of: receiving a MAC-PDU; checking whether an indication for robust HARQ feedback transmission is provided; and if yes, utilizing robust HARQ feedback transmission.

Abstract: A mobile station for wirelessly communicating with a base station, the mobile station including a storage unit for storing determination information for determining whether or not an application that requires wireless communication is being executed and operation information defining whether or not the application maintains a logical connection when the application is out-of-service for each application; and a processor for, when detecting out-of-service state, determining an application being executed on the basis of the determination information, determining whether or not the application being executed maintains the logical connection on the basis of the operation information, and when determining that the application maintains the logical connection, trying to wirelessly connect to the base station.

Abstract: A method, an apparatus, and a system for controlling a carrier Power Amplifier (PA) of a Base Station (BS) in a network communication field are disclosed. The method includes: obtaining power control information of the carrier PA at a next timeslot; and adjusting working voltage of the carrier PA at the next timeslot according to the power control information. An apparatus and a system for controlling a carrier PA of a BS are also disclosed. The method, apparatus, and system can reduce energy consumption of the BS and improve energy efficiency of the BS.

Abstract: Systems, devices, and methods for adjusting a transmission power at a femto node are described herein. According to the systems, devices, and methods herein, a measurement of a signal transmitted from a transmitting node may be communicated to the femto node, for example from a user equipment or a neighboring femto node, for use in adjusting the power. The transmitting node may comprise the femto node, a macro node, or a neighboring femto node. In addition, statistics regarding such measurements may be communicated to the femto node for use in adjusting the power. The femto node may also adjust the power based on unsuccessful registration attempts or interference communications received at the femto node.

Abstract: A radio base station includes: a table storage unit storing a table in which an E-TFCI indicating a transport format combination indicator of the physical data channel to be transmitted by a mobile station is associated with ?ed that is used to determine a SG and is an offset value of transmission power of the physical data channel to be transmitted by the mobile station; a parameter selector selecting the ?ed associated with the E-TFCI from the table; and a communication controller determining a SG based on the ?ed thus selected and an E-TFCI associated with the selected ?ed, and controlling transmission power of the mobile station by using the SG thus determined.

Abstract: A communication device transmits a plurality of measurement packets for identifying an available bandwidth to another communication device connected via a network, using bandwidths in the measurement bandwidth range. The communication device then determines whether the available bandwidth is included in the measurement bandwidth range. In a case where the available bandwidth is not included in the measurement bandwidth range, the communication device determines whether the available bandwidth is located on a narrowband side or on a wideband side with respect to the measurement bandwidth range, and determines a bandwidth shift amount based on an amount of change. The communication device updates the measurement bandwidth range by shifting one of the lower bandwidth and the upper bandwidth based on the bandwidth shift amount.

Abstract: A method of reducing an energy consumption of a wireless network, the method including periodically entering a sleep mode by a receiver node, broadcasting a signal simultaneously across a wide band frequency range, upon waking up from the sleep mode, listening by the receiver node to only a first narrow part of the wide band frequency range, the receiver node subsequently either returning to sleep if a signal strength of the broadcasted signal is less than a predefined signal strength threshold, or staying awake for an additional period of time if the signal strength of the broadcasted signal is greater than the predefined signal strength threshold.

Abstract: A base station includes a storage unit to store a codebook, wherein the codebook includes a plurality of matrices; a control unit to perform beamforming using the codebook to generate a signal; and a multi-antenna to transmit the signal. For all of the plurality of matrices, all column vectors of a same matrix of the plurality of matrices are orthogonal to each other. For all columns of the plurality of matrices, all column vectors of a same column of all of the plurality of matrices satisfy a Grassmannian line packing (GLP) criterion.

Abstract: The present application discusses, among other things, apparatus and methods for detecting and using a excess capacity on a wireless network medium. A method embodiment includes calculating a differential metric based on a first metric and a second metric for a primary network. The primary network can have a medium shared with a secondary network. The first metric can be based on a first distribution of traffic on the primary network and can correspond to absence of a perturbation of the medium. The second metric can be based on a second distribution of traffic on the primary network and can correspond to a perturbation of the medium from a node of the secondary network. The method can include selecting a transmission power for the node based on the differential metric.

Abstract: A method, program and system for transmitting from a transmitter to a receiver over a wireless multiple-input-multiple-output channel. In one aspect, the method may comprise encoding precoding information fed back from the receiver to the transmitter according to a differential encoding scheme, and resetting the differential encoding scheme upon detecting a condition. In another aspect, the method may comprises encoding precoding matrices fed back from the receiver to the transmitter relative to a most-probable subset of precoding matrices. In another aspect, the method may comprise transmitting an indication of and/or the size of a preferred subset of precoding matrices for use in the encoding.

Abstract: Techniques to support beamforming for stations in a wireless network are described. In one aspect, a station may support beamforming with implicit feedback or explicit feedback by having capabilities to transmit and receive sounding frames, respond to training request by sending a sounding frame, and respond to request for explicit feedback. In one design of explicit beamforming, the station may send a first frame with a request for explicit feedback and may also send a Null Data Packet (NDP) having at least one training field but no data field. The station may receive a second frame with the explicit feedback, which may be derived based on the NDP. The station may derive steering information (e.g., steering matrices) based on the explicit feedback and may then send a steered frame with beamforming based on the steering information. The station may also perform implicit beamforming using NDP for sounding.