DRX Timer Activation for Joint Channel Estimation
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting joint channel estimation for physical uplink shared channels (PUSCH) due to discontinuous reception (DRX) timer configurations, which can disrupt phase continuity and impact demodulation performance, especially during uplink DMRS bundling operations.
Innovation Solution
Implementing a method where user equipment (UE) activates a discontinuous reception (DRX) round trip time (RTT) timer based on the end of a time domain window indicated in a joint channel estimation configuration, allowing for efficient DRX timer management and supporting joint channel estimation by controlling reception operations during PUSCH repetitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If DRX timer is activated during PUSCH repetition transmission, then power saving is improved, but phase continuity is disrupted and demodulation performance deteriorates
Solution Approach 1:
The patent makes the DRX timer activation dynamic by introducing conditions based on time domain windows and uplink/downlink direction configurations. The UE dynamically determines whether to activate the DRX timer based on whether the current time falls within a configured time domain window and whether the direction is uplink or downlink, thereby adapting power saving behavior to maintain phase continuity when needed.
Solution Approach 2:
The patent changes the parameter of DRX timer activation state based on configuration parameters (time domain window, direction indication). By modifying the activation condition parameter rather than keeping it fixed, the system achieves both power saving in appropriate scenarios and phase continuity in critical transmission periods.
2Reliability
If joint channel estimation is supported, then demodulation performance is improved, but reception operations must be maintained during PUSCH repetitions increasing power consumption
Solution Approach 1:
The patent applies local quality by differentiating treatment based on time domain and direction. Instead of uniformly maintaining or stopping reception operations, the system applies different qualities (activation or deactivation of DRX timer) to different time periods and directions, ensuring channel estimation accuracy only when and where it is critical while saving power elsewhere.
3Use of energy by moving object
If DRX timer activation is unrestricted, then power saving is improved, but transmission overhead increases due to phase discontinuity
Solution Approach 1:
The patent uses preliminary action by pre-configuring time domain windows and direction indications before PUSCH repetition transmissions. This advance configuration allows the UE to predict when phase continuity is needed and plan DRX timer activation accordingly, avoiding unnecessary phase discontinuities and reducing transmission overhead while maintaining power saving benefits.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit at least one physical uplink shared channel (PUSCH) repetition of a plurality of PUSCH repetitions associated with a joint channel estimation configuration that indicates at least one time domain window for transmission of the plurality of PUSCH repetitions. The UE may activate, after an end of the at least one time domain window, a discontinuous reception round trip time (RTT) timer based at least in part on the transmission of the at least one PUSCH repetition. Numerous other aspects are described.