Abstract:
Aspects of the present disclosure provide for the pairing of two or more inter-band time division duplex (TDD) carriers. In some examples disclosed herein, a conjugate or inverse carrier may be used such that full duplex, or a close approximation thereto, is achieved. With the introduction of a paired channel and fast control channels, rapid uplink/downlink switching may be achieved for TDD carriers efficiently and effectively. Other aspects, embodiments, and features are also claimed and described.
Abstract:
Aspects of the present disclosure provide for the pairing of an inter-band carrier with a time division duplex (TDD) carrier. If the paired band is a frequency division duplex (FDD) band, then base stations and mobile devices may transmit and receive additional thin control channels on FDD carriers to enable full duplex operations. If the paired band is a TDD band, then a conjugate or inverse carrier may be used such that full duplex, or a close approximation thereto, is achieved. With the introduction of a paired channel and fast control channels, rapid uplink/downlink switching may be achieved for TDD carriers efficiently and effectively. Other aspects, embodiments, and features are also claimed and described.
Abstract:
Methods, systems, and devices for half-duplex frequency division duplexing (HD-FDD) hybrid automatic repeat request (HARQ) operation are described. The base station may receive a message from a user equipment (UE) indicative of a duplexing capability of the UE. The base station may then select a HARQ process limit based on the duplexing capability. In some examples, the base station may anticipate a collision between an uplink (UL) transmission and a downlink (DL) subframe based on the selected HARQ process limit. The base station may then schedule a transmission to avoid the anticipated collision. In some examples, the base station may limit a number of configurations available for channel quality indicator (CQI) or a precoding matrix indicator (PMI).
Abstract:
Techniques for supporting channel measurement and reporting in a wireless communication system are described. In one design, a cell transmits a cell-specific reference signal (CRS) used for channel estimation and coherent demodulation and a channel spatial information reference signal (CSI-RS) used for channel measurement and channel feedback reporting. The cell may transmit the CSI-RS less frequently than the CRS, or from more antenna ports than the CRS, or on fewer resource elements than the CRS, or a combination thereof. In one design, a user equipment (UE) determines at least one bandwidth part configured for the UE, with each bandwidth part covering at least one subband. The UE receives the CRS and CSI-RS from the cell, determines channel feedback information for the at least one bandwidth part based on the CSI-RS, sends the channel feedback information to the cell, and receives data transmitted by the cell based on the channel feedback information.
Abstract:
Certain aspects of the present disclosure provide techniques for improving detection and processing of secondary synchronization signals (SSS).
Abstract:
Methods, systems, and devices are described for a UE to determine a DRX wakeup rule in an eICIC environment. A UE may identify a measurement period associated with reduced interference from one or more cells in a wireless communications network. The cells may be a serving cell or a neighbor cell. The measurement period may be identified based on eICIC data available to the UE. The eICIC data may be sent to the UE by a serving cell and/or determined by the UE. The UE may power up a wireless modem to perform a warm-up measurement of the serving cell during the identified measurement period prior to transitioning the UE to a DRX on state.
Abstract:
Methods, apparatuses, systems, and devices are described for wireless communication. In one configuration, an allocation of physical resources to be utilized by a wireless communication device during one or more portions of a subframe may be received at the wireless communication device. There may then be determined, based on the received allocation of physical resources, one or more bandwidths to be utilized at the wireless communication device during the one or more portions of the subframe. At least one of a voltage level or a clock frequency of the wireless communication device may be adjusted to process the one or more portions of the subframe. The at least one of the voltage level or the clock frequency may be adjusted based on the determined one or more bandwidths.
Abstract:
Certain aspects of the present disclosure provide techniques for improving detection and processing of secondary synchronization signals (SSS).
Abstract:
A signaling channel that punctures traffic channels is used to send signaling, e.g., acknowledgments (ACKs). To send signaling, resources for the signaling channel are determined, e.g., based on a frequency hopping pattern. Signaling is spread with a spreading code (e.g., a Walsh code) to generate spread signaling, which is mapped to the resources for the signaling channel. Each resource may be partitioned into multiple clusters. A signaling message may be mapped to different clusters to achieve diversity. Traffic data may also be mapped to other resources for a traffic channel assigned for use. Traffic data mapped to the other resources for the signaling channel is punctured. The mapped signaling and traffic data are further processed (e.g., for OFDM or SC-FDMA) and transmitted.
Abstract:
An idle mode UE can RACH to a cell different from the cell paging the UE. The UE can be allocated additional time to respond to all cells in the neighborhood to identify the cell in which to RACH. Interference cancellation can occur at different rates based on whether the UE is in connected mode or idle mode. The time to respond to the page can be a function of a paging cycle. Additionally, a variable bias may promote early handoff to lower power cells and late handoff to high power cells.