Abstract: Techniques to support periodic reporting of channel state information (CSI) for multiple component carriers (CCs) with different system configurations are disclosed. A user equipment (UE) is configured with multiple CCs for carrier aggregation. Each CC is associated with a particular system configuration, which indicates whether FDD or TDD is utilized and, if TDD is utilized, a particular uplink-downlink configuration for the CC. Each CC is associated with a set of subframes available to send CSI on that CC, which is determined based on the system configuration of the CC. The multiple CCs configured for the UE include at least two CCs associated with different system configurations and different sets of subframes available to send CSI. The UE sends CSI for a first CC on a second CC based on a set of subframes available to send CSI on the second CC.

Abstract: A wireless communication system facilitates multichannel periodic and aperiodic feedback (e.g., Channel Quality Indicator (CQI), Rank indicator (RI), Precoding Matrix Indicator (PMI)) from a population of user equipment while facilitating legacy single carrier communication. Paired downlink (DL)/uplink (UL) or many-to-one mapping communication can be established by common system information or dedicated signaling. In one aspect, a flag sent by system information or by dedicated signaling can indicate which means controls. Feedback can be configured for each carrier independently reported in a concatenated in frequency fashion, reported in a cycle in time fashion, or reported in a staggered in time and frequency fashion. Feedback can be reported jointly as one wide bandwidth. Feedback can be a single report perhaps reported on a data channel for more capacity or by cycled carrier/subband reporting.

Abstract: A method, a computer program product, and an apparatus for determining retransmission feedback resources are provided. An apparatus receives a downlink resource assignment over a control channel and obtains an offset related to a region for retransmission feedback resources. The offset is determined based on a type of the control channel. The apparatus determines resources for communicating retransmission feedback for communications received over the downlink resource assignment based on an index of a resource related to the downlink resource assignment and the offset. The apparatus transmits retransmission feedback for the communications over the resources.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus may determine a number of uplink timing groups configured for a plurality of component carriers, and determine whether to transmit at least one of data or control information on one or more first component carriers of the plurality of component carriers concurrently with sounding reference signals (SRS) on one or more second component carriers of the plurality of component carriers based at least in part on the number of uplink timing groups. When only one uplink timing group is determined, the SRS is transmitted in a symbol on the one or more second component carriers if the data and control information is not transmitted in the symbol. When two uplink timing groups are determined SRS may be transmitted on the second component carriers concurrently with data or control information on the component carriers.

Abstract: Systems and methodologies are described that effectuate or facilitate multichannel feedback in multichannel wireless communication environments. In accordance with various aspects set forth herein, systems and/or methods are provided that construct a carrier set, classifies a carrier as belonging to the carrier set, utilizes the carrier as representative of all carriers included in the carrier set to measure a channel quality of the carrier, and transmits a CQI based on the channel quality of the carrier, wherein the broadcast CQI is representative of all carriers included in the carrier set.

Abstract: Certain aspects of the present disclosure relate to techniques for user-specific search space design for multi-carrier operation in Long Term Evolution Advanced (LTE-A) systems. The user-specific search space can be designed for searching Physical Downlink Control Channels (PDCCHs) transmitted on one component carrier (CC) that schedules Physical Downlink Shared Channel/Physical Uplink Shared Channel (PDSCH/PUSCH) transmissions on two or more different CCs. In one aspect, multiple independent user-specific search spaces can be designed. In another aspect, one user-specific search space can be randomly derived and then expanded to accommodate search for multiple CCs. In yet another aspect, the search space design can retain randomness in starting search element indices of multiple PDSCH/PUSCH CCs, while overlapping of search spaces for multiple PDSCH/PUSCH CCs can be avoided.

Abstract: Systems and methodologies are described that facilitates communicating Physical Control Format Indicator Channel (PCFICH) information to a user equipment (UE) in which the PCFICH information is specific to a particular component carrier. The PCFICH information for each component carrier can be communicated via an anchor component carrier in order to reduce decoding each PCFICH information for each component carrier. In particular, the PCFICH information can be decoded for an anchor component carrier and PCFICH information for additional carriers can be included in a Multi-Carrier (MC) grant of the Physical Downlink Control Channel (PDCCH).

Abstract: Systems and methodologies are described that effectuate or facilitate multichannel feedback in multichannel wireless communication environments. In accordance with various aspects set forth herein, systems and/or methods are provided that construct a carrier set, classifies a carrier as belonging to the carrier set, utilizes the carrier as representative of all carriers included in the carrier set to measure a channel quality of the carrier, and transmits a CQI based at least in part of the channel quality of the carrier, wherein the broadcast CQI is representative of all carriers included in the carrier set.

Abstract: Techniques for reporting channel state information (CSI) are disclosed. A user equipment (UE) may be configured for operation on multiple carriers with different configurations, e.g., FDD and TDD carriers and/or carriers with different uplink-downlink configurations. The multiple carriers may have different subframes for making measurements for CSI and/or different subframes for sending CSI. In response to a CSI request, the UE may determine at least one reference subframe to use for determining CSI for the multiple carriers. The reference subframe may be common to the plurality of carriers and may, for example, be based the subframe in which the CSI request in sent. Alternatively, the reference subframe may be different for different carriers such as when it is based on different HARQ timelines applicable for the different carriers. The UE may determine the CSI for the multiple carriers based on the reference subframe(s) and may report the CSI.

Abstract: User equipment, systems, apparatuses, methods and/or computer program products are provided to facilitate random access procedures in a wireless communication network. The selection and utilization of uplink and downlink component carriers for conducting contention-free and contention-based random access procedures is facilitated in a multiple component carrier system, where a user equipment is configured with multiple uplink and downlink component carriers.

Abstract: A method for wireless communications is disclosed that includes determining a power operation control feature of a first mode of operation of a user equipment (UE). A channel prioritization is triggered based at least in part on the power operation control feature. A second configuration indicating UE operation in a second mode is received and is based on a UE generated report of a state resulting from the first mode of operation. The second mode of operation is then implemented.

Abstract: Certain aspects of the present disclosure provide closed loop and open loop power control techniques for each antenna of the user equipment (UE). The access point may measure the received signals from each antenna of the user equipment, calculate a power adjustment parameter for each antenna of the UE, and transmit the parameters to the UE. The UE may use the adjustment parameters to determine the transmit power value for each antenna. In addition, the UE may measure the path loss for each antenna and update the transmit power per antenna based on the path loss and other parameters.

Abstract: Techniques for supporting operation on multiple carriers are described. In an aspect, a carrier indicator (CI) field may be used to support cross-carrier assignment. The CI field may be included in a grant sent on one carrier and may be used to indicate another carrier on which resources are assigned. In one design, a cell may determine a first carrier on which to send a grant to a UE, determine a second carrier on which resources are assigned to the UE, set a CI field of the grant based on the second carrier and a CI mapping for the first carrier, and send the grant to the UE on the first carrier. The UE may receive the grant on the first carrier from the cell and may determine the second carrier on which resources are assigned to the UE based on the CI field of the grant and the CI mapping for the first carrier.

Abstract: Systems and methodologies are described that facilitate indicating feedback parameters for multiple single carrier assignments, multicarrier assignments, and/or the like according to single carrier-frequency division multiple access (SC-FDMA), relaxed SC-FDMA, etc. Feedback in relaxed SC-FDMA can be bundled by a mobile device to conserve power. In addition, a downlink assignment indicator (DAI) can be utilized to detect and indicate lost grants.

Abstract: A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus maintains at least one PHR trigger for triggering communication of a PHR for a plurality of component carriers. In addition, the apparatus communicates the PHR for at least one of the component carriers upon the at least one PHR trigger being triggered. The communicated PHR may be an aggregated PHR that includes power headroom information on the PCC and activated SCCs. The communicated PHR may further include an index associating information in the PHR to a corresponding component carrier. The communicated PHR may further include information indicating use of a PUSCH reference for computing the PHR for the at least one of the component carriers on which there is no PUSCH transmission.

Abstract: Methods and apparatuses are provided for determining whether to deactivate one or more uplink carriers based at least in part on determining deactivation of a downlink carrier. A linking of the one or more uplink carriers to the downlink carrier can be obtained for determining whether to deactivate the one or more uplink carriers. The linking can be a system information block linking, a carrier indicator field linking, a pathloss linking, an uplink timing reference linking, and/or the like. The one or more uplink carriers can be deactivated based on the linking and/or another linking to one or more other downlink carriers.

Abstract: Methods, systems, devices, and computer program products are described which facilitate the transmission and reception of acknowledgment/negative acknowledgment (ACK/NACK) feedback associated with downlink data transmissions in a multi-carrier wireless communication system. Scheduling request resources may be utilized to enable the transmission of ACK/NACK feedback for the multiple component carriers when a positive scheduling request is present and the techniques described may be utilized to improve the efficiency of control channel signaling in different system configurations.

Abstract: An apparatus for wireless communication may allocate resources for multicarrier wireless communication. The apparatus may be enabled for cross-carrier signaling and semi-persistent scheduling on at least one carrier. Semi-persistent scheduling may be enabled by deriving a resource, such as a PHICH resource, for uplink HARQ operation using at least part of a demodulation reference signal field. The resource may be chose to reduce PHICH collision and may be based on a starting physical block of uplink data transmission. Cross-carrier signaling may be enabled by an information field, such as a carrier indicator field in the PDCCH, not enabled when cross-carrier signaling is not enabled.

Abstract: Techniques for supporting multimedia broadcast/multicast services (MBMS) are described. In an aspect, resources used for MBMS services may be provided with a multi-tier structure. In the first tier, resources (e.g., subframes) used for a multicast control channel (MCCH) for MBMS services may be signaled in a system information block (SIB). In the second tier, resources (e.g., subframes) for channels carrying data for MBMS services may be signaled via the MCCH. In one design, a base station/cell may determine resources used to send a MCCH. The cell may generate a SIB comprising information indicative of the resources used to send the MCCH. The cell may send the SIB in a broadcast control channel (BCCH). The cell may send the MCCH on the resources indicated by the information sent in the SIB. The cell may send other channels carrying data for MBMS services based on information sent in the MCCH.

Abstract: Techniques for sending feedback information for multi-carrier operation are described. In an aspect, feedback information for data transmissions on multiple downlink carriers may be sent on at least one uplink resource determined based on at least one downlink resource used to send at least one downlink grant for the data transmissions. In another aspect, feedback information for data transmissions on multiple downlink carriers may be sent with reduced or no orthogonal spreading to enable more feedback information to be sent. In yet another aspect, feedback information for data transmissions on multiple downlink carriers may be sent with channel selection. A UE may send a transmission of at least one signal value on at least one resource to convey acknowledgement (ACK) information for data transmissions on multiple downlink carriers. The signal value(s) and resource(s) may be determined based on the content of the ACK information.