Abstract:
The various embodiments include a dual-SIM-dual-active (DSDA) device and methods for implementing robust receive (Rx) processing to resolve radio frequency coexistence interference between two subscriptions operating on the DSDA device. The DSDA device may detect when a subscription (the “aggressor”) de-senses the other subscription (the “victim”) as a result of the aggressor's transmissions, and in response, implement robust Rx processing to mitigate the effects of de-sense on the victim while causing minimal impact to the aggressor.
Abstract:
Methods and apparatus for event reporting based spurious dedicated physical channel (DPCH) removal in soft handover include user equipment (UE) management of spurious channels. In one aspect, the disclosure provides methods and apparatus for wireless communication that may include determining that a dedicated physical channel (DPCH) is spurious, removing the DPCH from soft combining, and sending a report indicating that a cell associated with the DPCH is unavailable. Further, the methods and apparatus may include incrementing a counter for the cell associated with the DPCH in response to removing the DPCH, determining whether the counter exceeds a removal threshold, and increasing a time to trigger for sending a report to add the cell to an active set in response to the counter exceeding the removal threshold. A cell associated with a removed DPCH may also be excluded from measurements of a current frequency.
Abstract:
Disclosed are methods and apparatus for initializing an equalizer in a diversity receiver. In one aspect, the initialization includes estimating a channel impulse response (CIR) for each receiver chain of the diversity receiver; determining noise power estimates for each receiver chain based on the CIRs; and adaptively adjusting equalizer taps of each receiver chain based on the noise power estimates. In one aspect, the adaptive adjusting of the equalizer taps is based on scaling the CIR and covariance metrics for the receiver chain with higher noise power by a scale factor determined from the noise power estimates. In another aspect, the adaptive adjusting of the equalizer taps is based adaptive conditioning on the diagonal of the covariance matrix.
Abstract:
Apparatus and methods include receiving one or more first signals at a user equipment (UE) during a first portion of a transmission time interval (TTI), wherein the one or more first signals are transmitted by a network to the UE using a transport format; determining the transport format upon receiving the one or more first signals and prior to a second portion of the TTI subsequent to the first portion of the TTI; and receiving one or more second signals at the UE during a second portion of the TTI.
Abstract:
Methods and apparatus of controlling user equipment transmit power in a wireless communication system include communicating with a first base station and a second base station. Further, the methods and apparatus include establishing a high speed channel with one of the first base station or the second base station, wherein the one of the first base station or the second base station defines a high speed serving cell and a remaining one of the first base station or the second base station defines a non-high speed cell. Additionally, the methods and apparatus include ignoring a transmit power control command from the non-high speed cell when a high speed power control state applies to controlling a transmit power level.
Abstract:
Various aspects of the disclosure provide a method of operating a user equipment (UE) to determine and report a throughput enhancing channel quality indicator (CQI) value when a physical channel between the UE and a base station is temporally uncorrelated. Reporting such CQI value may maximize the throughput of the channel when it remains temporally uncorrelated. In one aspect of the disclosure, the UE communicates with a base station utilizing a channel and determines that the channel is temporally uncorrelated. The UE further determines a plurality of CQIs in a first CQI reporting mode and computes the respective throughputs of the channel based on the plurality of CQIs. In addition, the UE selects a CQI of the plurality of CQIs corresponding to the highest throughput among the plurality of throughputs, and reports the selected CQI to the base station in a second CQI reporting mode while the channel remains temporally uncorrelated.
Abstract:
Apparatus and methods include receiving one or more first signals at a user equipment (UE) during a first portion of a transmission time interval (TTI), wherein the one or more first signals are transmitted by a network to the UE using a transport format; determining the transport format upon receiving the one or more first signals and prior to a second portion of the TTI subsequent to the first portion of the TTI; and receiving one or more second signals at the UE during a second portion of the TTI.
Abstract:
Various aspects of the present disclosure provide for conditionally disabling discontinuous reception (DRX). For example, DRX may be disabled if there is a loss of DRX synchronization, a loss of signal radio bearer traffic, a poor radio frequency condition, a low signal-to-interference ratio estimate, a low transmit power condition, or a drop in transmit power. Various aspects of the present disclosure provide for determining that an access terminal and the network are not in synchronization (e.g., DRX synchronization), and attempting to re-synchronize the access terminal and the network. In cases where a loss of DRX synchronization involves one entity having DRX enabled while another entity has DRX disabled, DRX may be temporarily disabled until synchronization is restored. In cases where a loss of DRX synchronization involves different entities using different subframe indices, the subframe index used by one of the entities may be changed to restore synchronization.
Abstract:
Methods and apparatus of controlling user equipment transmit power in a wireless communication system include communicating with a first base station and a second base station. Further, the methods and apparatus include establishing a high speed channel with one of the first base station or the second base station, wherein the one of the first base station or the second base station defines a high speed serving cell and a remaining one of the first base station or the second base station defines a non-high speed cell. Additionally, the methods and apparatus include ignoring a transmit power control command from the non-high speed cell when a high speed power control state applies to controlling a transmit power level.
Abstract:
Techniques for uplink transmit power command (ULTPC) rejection threshold optimization in WCDMA for power control algorithm 2 (PCA2) are described. Uplink transmit power control commands may be received on a five-slot interval. The uplink transmit power control commands may be decoded for each of the five slots. The decoded uplink transmit power control commands may be compared for each of the five slots to a threshold. The threshold may be optimized to minimize overall transmit power control decision error. A bit decision may be made for each of the five slots based on the comparison and an overall transmit power control command may be determined based on the bit decision for each of the five slots over the five-slot interval.