摘要:
Methods, systems, and devices are described to support multiple timing advance groups for multi-carrier user equipment. Some embodiments provide for utilizing timing advance group synchronization information across multiple timing advance groups. Some embodiments provide support for performing random access procedures in relation to timing advance groups that may not include a primary component carrier. Some embodiments utilize timing advance group indexes to enable cross-carrier random access procedure management. Other embodiments support parallel random access procedures across multiple timing advance groups. Some embodiments provide for a reference downlink component carrier for timing within a timing advance group.
摘要:
Methods and apparatuses for wireless communication are provided. In an aspect, Transmissions are received from multiple antennas of a user equipment and a differential power control message that is based on an imbalance of transmitted power from the multiple antennas is transmitted. In another aspect, a differential power control message that is based on an imbalance of transmitted power from multiple antennas of a user equipment is received and based on the message, the imbalance is compensated for by varying a transmit power from one or more of the multiple antennas.
摘要:
Techniques are provided for communicating control information for aggregated carriers. For example, a method includes receiving one or more assignments for a plurality of aggregated carriers. For example, the at least one of the plurality of aggregated carriers is a time division duplexing (TDD) carrier having a different subframe configuration than at least another one of the plurality of aggregated carriers. The method may include communicating control information for the plurality of aggregated carriers over one of the plurality of aggregated carriers.
摘要:
Certain aspects of the present disclosure provide techniques that may help resolve ambiguities between a base station and a user equipment (UE) regarding the use or resource elements (REs) reserved for special purposes, such as PDSCH muting and/or CSI-RS.
摘要:
Methods and apparatuses are provided for bundling resource blocks (RB) for varying bandwidth scenarios in wireless communication. Where multiple access points form a coordinated multiple point (CoMP) set for a device, the access points may be configured to use a common RB bundling size for precoding transmissions to the device. In another aspect, where a device is allocated a bandwidth and a bandwidth extension, a RB bundling size may be determined for the bandwidth and bandwidth extension, jointly or individually. The RB bundling size may be determined based on the bandwidth or on the bandwidth and the bandwidth extension.
摘要:
Techniques for acknowledging data transmissions in a multi-carrier wireless communication network are disclosed. In some aspects, a user equipment (UE) receives a data transmission on at least one component carrier (CC) in a plurality of configured CCs. The UE determines acknowledgement/negative acknowledgement (ACK/NACK) information for the data transmission and determines an uplink channel for sending the ACK/NACK information. When the ACK/NACK information is sent on a physical uplink control channel (PUCCH), the UE may perform power control based on which CCs in the plurality of configured CCs data is received. When the ACK/NACK information is sent on a physical uplink shared channel (PUSCH), the UE may determine a number of resource elements based on its CC configuration.
摘要:
Techniques for sending control information relating to multiple downlink carriers and data on a single uplink carrier are described. A user equipment (UE) may be scheduled to transmit on a designated uplink carrier. The UE can multiplex control information for multiple downlink carriers with data for transmission on the uplink carrier in a same subframe. Multiplexing may be performed according to a type of the control information and/or an ordering, priority, or association of the downlink carriers. The UE can selectively encode the control information separately for each downlink carrier and/or jointly across downlink carriers. The control information may be mapped to a single layer or multiple layers of a data channel. The UE may send the multiplexed control information and data on the data channel in the subframe while maintaining a single-carrier waveform.
摘要:
Methods, systems, apparatus and computer program products are provided to receive downlink control information (DCI) in a downlink control channel, where the downlink control information configured to indicate an allocation of uplink resources with a clustered uplink resource allocation protocol or a contiguous uplink resource allocation protocol, to detect which of the clustered uplink resource allocation protocol and the contiguous uplink resource allocation protocol is indicated and to allocate the uplink resources based on the indicated uplink resource allocation protocol.
摘要:
Systems and methodologies are described that facilitate reducing false detections of control channels during blind decode when multiple component carriers are configured. A UE can perform blind detection of control channels on a plurality of carriers, wherein each control channel detected can be validated to reduce false detections. In one aspect, a reference carrier can be selected, wherein one or more detected control channels are validated so long as one detected control channel is on the reference carrier. In another aspect, control channel can be bundled such that multiple control channel detections are required for validation. Moreover, dummy control channels can be introduced that provide UE with guidance during blind decoding, as well as provide validation of detections. Further, various combinations of a reference carrier, bundling, and/or a dummy control channel can be utilized.
摘要:
Certain aspects of the present disclosure propose methods and apparatus for utilizing unused Multimedia Broadcast over a Single Frequency Network (MBSFN) subframes for unicast transmissions. The proposed methods include efficient cyclic prefix (CP) and MBSFN frame structure design, and an optimized subframe/carrier bundling window design for hybrid automatic repeat request (HARQ) feedback in presence of the MBSFN subframes.