Abstract: User equipment (UE), referred to herein as an interfering UE (130), can be detected that is proximate to a low-power cell (120), such as a micro-cell, pico-cell, femto-cell, a relay, or the like. The interfering UE (130) can be transmitting to the base station (110) at a power level that is producing high interference affecting uplink performance between a different UE and the low-power cell (120). A power adjustment message (140) can be generated at the base station (110). The power adjustment message (140) can be conveyed (156) from the base station (110) to the interfering UE (130). The power level adjustment message (130) can cause the interfering UE (130) to lower its transmission power (164), which reduces the high interference, thereby improving uplink performance between the different UE and the low-power cell (120).

Abstract: A method for communicating control channel information in a wireless communication system, including transmitting a super-frame having a time-frequency resource region containing an allocation control channel and multiple pilot elements, at least some of which are associated with the allocation control channel, and indicating, in a configuration information control channel of the super-frame, a characteristic of the pilots elements associated with the allocation control channel.

Abstract: A method for blindly detecting a precoding matrix index used to transmit a data or control signal is provided. The method includes receiving at a mobile station (102) a common reference signal and user specific data and control signal weighted by precoding matrix. An objective function is applied to the received reference signal and user specific data and control signal that minimizes the objective function for each of at least one rank used to transmit the received user specific data and control signal and each of known possible modulation constellations used to transmit the received data/control signal to determine the precoding matrix index (PMI).

Abstract: A method and system that enables the usage of sounding-based feedback or analog feedback in a MIMO communication system with non-beamformed or broadcast pilot symbols is disclosed. The mobile station may employ a feedback channel to send a sounding waveform to a base station, a feedforward channel to receive from the base station codebook weights derived from the send sounding waveform, a receiver to receive communication from the base station, and a processor to detect beamformed data from the received communication and received codebook weights from the base station. The base station processes the sounding waveform to determine codebook weights on groups of subcarriers. Additionally, the base station transmits the beamformed payload and broadcast pilots to the mobile station.

Abstract: An apparatus and method to feedforward non-quantized precoding weights in an OFDM communication system includes a first step (300) of sending feedback information from a subscriber station (SS) to a base station (BS). A next step (302) includes deriving non-quantized weight information from the feedback information. A next step (304) includes transmitting symbols carrying the non-quantized weight information and non-precoded pilot symbols by the BS. A next step (305) includes receiving the information and symbols by the SS. A next step (306) includes estimating the non-quantized weights from the symbols carrying the non-quantized weight information and the non-precoded pilot symbols by the SS. A next step (308) includes decoding data from the BS by the SS using the estimated non-quantized weight information.

Abstract: A wireless communication system (100) and method for providing high speed uplink packet access from user equipment (128, 130) to a base station (114, 116, 118, 120). Each of the user equipment (128, 130) and the base station (114, 116, 118, 120) includes a transmitter (1106, 1206), a receiver (1104, 1204), and a controller (1108, 1208) coupled to the transmitter and the receiver. Data packets are transmitted from the user equipment (128, 130) to the base station (114, 116, 118, 120). Control information, corresponding to the data packets, is transmitted from the base station (114, 116, 118, 120) to the user equipment (128, 130). The control information includes an absolute grant channel indicator. The controller (1108) of the user equipment (128, 130) is configured to disable an uplink transmission of the transmitter based on a indicator in the control information.

Abstract: An Orthogonal Frequency Division Multiplexing communication system is provided that triggers a transmission of an uplink sounding signal by use of a Downlink Control Information (DCI) message. In various embodiments of the invention, the DCI message may be used to individually trigger an uplink sounding signal by a single user equipment or may be used to trigger an uplink sounding signal by a group of users equipment.

Abstract: A system and method for uplink power control for aggregated channels in a communication network includes a step 300 of defining power scaling parameters to be used to derive power scaling factors to be applied to associated aggregated uplink channels. A next step 302 includes providing the power scaling parameters to user equipment. A next step 304 includes applying power scaling factors derived from the power scaling parameters to the associated aggregated uplink channels when the user equipment will exceed a maximum transmit power.

Abstract: In an OFDM communication system, wherein a frequency bandwidth is divided into multiple Physical Resource Units (PRUs), a Frequency Partitioning Configuration Module (FPCM) is provided that configures a physical layer for use in multiple coverage areas. The FPCM divides the PRUs into a first group, for frequency selective allocations, and a second group, for frequency diverse allocations. The FPCM subdivides each of the two groups into multiple sets of PRUs, maps the sets of PRUs from the first group to consecutive PRUs allocated for contiguous segment allocation (CS-PRUs), and maps the sets of PRUs from the second group to consecutive PRUs allocated for distributed segment allocation (DS-PRUs). The FPCM permutes the DS-PRUs and allocates the CS-PRUs and the permuted DS-PRUs to at least one frequency partition.

Abstract: A method for uplink ACK/NACK for LTE TDD. The method includes receiving a frame having multiple subframes wherein a plurality of subframes being downlink subframes and at least one subframe being an uplink subframe. One uplink subframe can contain an acknowledgment/non-acknowledgment (ACK/NACK) corresponding to at least one of the plurality of downlink subframes. To transmit ACK/NACKs, one uplink subframe for ACK/NACK is used in response to one of the plurality of downlink subframes. In addition, ACK/NACK responses can be bundled into one uplink subframe for at least two of the plurality of downlink subframes. In an embodiment, multiple ACK/NACK responses can be used in one uplink subframe that corresponds to at least two of the plurality of downlink subframes in a multiple feedback configuration. One uplink subframe for ACK/NACK responses and bundling multiple ACK/NACK responses is for a bundled feedback configuration.

Abstract: A wireless communication system (100) and method for providing high speed uplink packet access from user equipment (128, 130) to a base station (114, 116, 118, 120). Each of the user equipment (128, 130) and the base station (114, 116, 118, 120) includes a transmitter (1106, 1206), a receiver (1104, 1204), and a controller (1108, 1208) coupled to the transmitter and the receiver. Data packets are transmitted from the user equipment (128, 130) to the base station (114, 116, 118, 120). Control information, corresponding to the data packets, is transmitted from the base station (114, 116, 118, 120) to the user equipment (128, 130). The control information includes an absolute grant channel indicator. The controller (1108) of the user equipment (128, 130) is configured to disable an uplink transmission of the transmitter based on a indicator in the control information.

Abstract: A method and apparatus are provided for feedback for closed-loop transmitting with multiple transmit antenna elements and multiple receive antenna elements. A base station includes a codebook containing sets of weightings for the multiple transmit antenna elements, with each set of weightings identified by an index and the codebook known to the base station and a served mobile station (MS). The base station pre-codes pilot signals using a precoding matrix, preferably a unitary matrix, to produce pre-coded pilot signals, which precoding matrix may or may not be known to the MS and which precoding matrix may or may not be included in the codebook. The base station then transmits the pre-coded pilot signals to the MS via the multiple transmit antenna elements and, in response, receives an index to a set of weightings in the codebook for use in a subsequent transmission of a data stream.

Abstract: A system and method for passive coordination of base stations in a closed-loop multiple-input multiple-output wireless communication system, includes a first step 400 of allocating a subframe zone to be used by a serving base station and a neighboring base station to provide synchronized communications. A next step 402 includes defining at least one beam combination for the base stations, the beam combination to be used over at least one resource block of the allocated zone. A next step 406 includes reporting feedback on measured channel conditions for the zone at a first time for the at least one beam combination and associated resource block of the zone. A next step 408 includes providing synchronized communications using the feedback by the base stations over the zone at a second time by repeating the same associated at least one beam combination and associated resource block of the zone.

Abstract: A method and apparatus for choosing a modulation and coding rate in a MU-MIMO communication system is provided herein. During operation, a node will determine the MCR to feed back to the base even though the mobile does not know which of the possible interferers (if any) will be using the same time/frequency resources as the mobile. This takes place via the mobile node calculating best antenna weights (codebook choice) for each group of subcarriers that can be potentially used by the mobile. Transmit weights v for each interferer are then determined and the weights are utilized to determine a best modulation and coding rate for the mobile.

Abstract: A method and eNode B are disclosed that allocate a Physical random access channel (PRACH) in an Orthogonal Frequency Division Multiplexing communication system. In one embodiment, the eNode B maintains a predetermined location of a PRACH within a sub-frame, which predetermined location is adjacent to a Physical uplink control channel (PUCCH), allocates one or more sub-frames of a radio frame to a PRACH, and receives an access attempt over the PRACH based on the predetermined sub-frame location and the allocated one or more sub-frames. In another embodiment, the eNode B allocates one or more Physical Resource Blocks (PRBs) of one or more sub-frames of a PRACH hopping pattern period to a PRACH and informs a user equipment of the PRBs allocated for the PRACH by transmitting a first parameter informing of a slot configuration and a second parameter informing of a duration of a PRACH hopping period.

Abstract: An apparatus and method to feedforward non-quantized precoding weights in an OFDM communication system includes a first step (300) of sending feedback information from a subscriber station (SS) to a base station (BS). A next step (302) includes deriving non-quantized weight information from the feedback information. A next step (304) includes transmitting symbols carrying the non-quantized weight information and non-precoded pilot symbols by the BS. A next step (305) includes receiving the information and symbols by the SS. A next step (306) includes estimating the non-quantized weights from the symbols carrying the non-quantized weight information and the non-precoded pilot symbols by the SS. A next step (308) includes decoding data from the BS by the SS using the estimated non-quantized weight information.

Abstract: A network node constructs (22) a downlink transmission using at least one group of resource elements. A remote unit receives (12) the downlink transmission and determines (13) a lowest index of the at least one group of resource elements. The remote unit then determines (14) an uplink resource, for use in uplink (UL) acknowledgment signaling, using the lowest index. The network node then receives (23, 24) the UL acknowledgment signaling that corresponds to the downlink transmission, the UL acknowledgment signaling having been transmitted using the uplink resource based on the lowest index. To determine the uplink resource, both the remote unit and the network node implicitly use the lowest index of the at least one group of resource elements that were used to construct the downlink transmission. Implicitly determining the uplink resource in this manner, serves to reduce overhead related to acknowledgment signaling.

Abstract: A method, system and communication network for transmitting information signals via uplink (UL) collaborative SDMA, in a wireless communication system. Base station receiver estimates a channel gain associated with the transmission path(s) of each user and keeps a matrix of normalized covariance, between users. Based on the estimated channel gain and the normalized covariance, ULS utility is able to compute channel capacity. Based on capacity estimates of (1) the multiplexed user signals and (2) the individual user signals, signals are either multiplexed for UL SDMA or are transmitted individually. An optimal selection of multiplexed signals may be based upon: (1) a cross user interface measurement; and (2) a selection mechanism based on eigen-decomposition techniques. The ULS utility enables a UL scheduler to pair information signals with clear spatial distinction and minimal correlation, based on capacity evaluations.

Abstract: A frame (200) and a method for allocating resources that is used in a wireless communication network is provided. The frame includes a first subframe (202) concatenated to a second subframe (204). A first portion (206) of the first subframe allocated for a control channel of a first protocol. A second portion (208) of the first subframe and the second subframe are allocated for a data channel for the first protocol. In an embodiment second portion of the first subframe and the second subframe are allocated for a data channel of the second protocol that are multiplexed with the data channel of the first protocol using frequency division multiplexing (FDM).

Abstract: An apparatus and method for providing sounding channel based feedback in an OFDM communication system includes a first step (400) of defining a sounding channel spread out over multiple OFDM symbols within a frame. A next step (402) includes conveying a message to a subscriber station including information about the sounding channel. A next step (404) includes requesting a sounding waveform from the subscriber station. A next step (408) includes sending the sounding waveform from the subscriber station over the multiple OFDM symbols. A next step (410) includes sending a downlink transmission weighted in response to the sounding waveform.