Abstract:
A method of wireless communication with a multi subscriber identity module (SIM) multi standby UE includes tuning away from a data call on a first SIM to perform an activity for a second SIM. The method also includes tuning back to the data call on the first SIM and delaying, for a predetermined time period, a layer 2 message after tuning back. The layer 2 message can be a protocol data unit (PDU) status transmission in response to receiving a polling bit, a radio link control (RLC) protocol data unit (PDU) polling bit transmission, or a data re-transmission.
Abstract:
A user equipment (UE) applies an uplink timing adjustment during a high speed data call to allow uplink transmission of different UEs to arrive at a base station at a particular estimated time. In one instance, the UE determines whether a downlink (DL) timing varies more than a predetermined amount within a specified time period. The UE applies a timing advance command received in response to a scheduling request when the timing varies more than the predetermined amount. The UE also ignores a current uplink timing based on a closed loop timing advance command
Abstract:
A user equipment (UE) sends random access request and scheduling requests for channels, such as a physical random access channel (PRACH) and a random access uplink control channel (E-RUCCH), in parallel rather than serially to improve data transmission latency. In one instance, the UE transmits a first preamble for a random access procedure and a second preamble for a scheduling request in response to receiving a hard-handover command. The UE receives a first acknowledgment response to one of the preambles. The UE determines when to transmit the scheduling request based at least in part on which preamble is acknowledged.
Abstract:
In baton handover in TD-SCDMA communications, a user equipment (UE) may use of a single receiver to reduce call drops during baton handover. Following uplink handover, the UE may simultaneously receive downlink communication from a target cell and a source cell when a condition is satisfied. If the UE measures a signal quality of the downlink communication of the target cell greater than a signal quality of the downlink communication of the source cell, the UE switches to the target cell and completes the handover. If the UE measures a signal quality of the downlink communication of the source cell greater than a signal quality of the downlink communication of the target cell, the UE returns the uplink to the source cell and terminates the handover. Thus the UE may avoid handover to a target cell with poor signal quality.
Abstract:
A user equipment (UE) may adjust its uplink transmission power and timing for communications with a target cell while awaiting completion of a baton handover procedure. The amount of adjustments for the uplink transmission power/timing may be based on an amount of time remaining before baton handover failure is declared. The steps size of the adjustments may increase as the time remaining before handover failure becomes smaller.
Abstract:
A method of wireless communication includes modifying an initial transmit power for a subsequent uplink physical channel based on the difference between the desired received powers of the subsequent uplink physical channel and a random access physical channel. When the difference between the desired power of the subsequent uplink physical channel and the random access physical channel is above a predefined threshold, the modification is based on a first adjusted factor. When the subsequent uplink physical channel and random access physical channel are on different frequencies (or time slots) the modification is based on a second adjusted factor.
Abstract:
A method of wireless communication includes receiving a list of neighbor cells and determining whether each of the neighbor cells in the list of neighbor cells has a path loss below a threshold value. The method also includes calculating a serving neighbor path loss (SNPL) based on a serving cell and only the neighbor cells having path loss below the threshold value.
Abstract:
Methods, systems, and devices for wireless communications are described. The described techniques relate to various scheduling procedures for wireless communications. In some implementations, a user equipment (UE) may estimate transmission power used over a duration for tracking a specific absorption rate (SAR) and may indicate the estimated transmission power to a network. The network may schedule the UE based on the estimated transmission power. In some implementations, the UE may receive a control message that includes an uplink grant and an indication to skip monitoring of a physical downlink control channel (PDCCH) during a discontinuous reception cycle (DRX) on-duration. The UE may transmit a message to accept, partially accept, or reject the skipping of PDCCH monitoring. In some implementations, the UE may be configured for multiple user, multiple input, multiple output (MU-MIMO) communications with other UEs. The UE may receive a message that indicates parameters of the other UEs.
Abstract:
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network node, configuration information indicative of an enhanced hybrid automatic repeat request (HARQ) acknowledgement/negative acknowledgement (ACK/NACK) configuration associated with initial physical downlink control channel (PDCCH) communications. The UE may receive, from the network node, a re-transmission of an initial PDCCH communication. The UE may identify a failure of the UE to receive the initial PDCCH communication. The UE may transmit, to the network node in association with the configuration information, enhanced HARQ ACK/NACK information indicative of the failure of the UE to receive the initial PDCCH communication. Numerous other aspects are described.
Abstract:
Method and apparatus to efficiently establish a fast call recovery based on an occurrence of an uplink radio link failure. The apparatus monitors for an uplink radio link failure condition between the UE and a network entity. The apparatus terminates a connection with the network entity based on a detection of the uplink radio link failure condition. The apparatus reestablishes a new connection on a same frequency or a different frequency with the network entity or a second network entity. The apparatus transmits an uplink radio link failure report with an uplink failure cause value based on the uplink radio link failure condition.