UE SPS Reception Control Using an SDR Timer
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Solution Overview
Problem
The challenge in wireless communication systems is to efficiently manage limited radio resources for data transmission and control information while addressing latency and delay issues, particularly in applications that are latency-sensitive.
Innovation Solution
A method and apparatus for a user equipment (UE) in a wireless communication system that utilizes semi-persistent scheduling (SPS) configurations and a subsequent data reception (SDR) timer to optimize data reception, skipping unnecessary SPS occasions and monitoring control channels based on the SDR timer status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE monitors all SPS occasions for data reception, then data reception reliability is improved, but power consumption increases
Solution Approach 1:
The UE performs preliminary action by skipping monitoring of SPS occasions that are determined to be unnecessary based on the SDR timer status and reception history, thereby reducing power consumption while maintaining reliable data reception through selective monitoring of relevant occasions
Solution Approach 2:
The patent extracts and removes unnecessary monitoring operations from the SPS occasion list by identifying and skipping occasions where data reception is not expected, thus reducing power consumption while preserving the reliability of actual data reception through targeted monitoring of relevant occasions
2Use of energy by moving object
If the UE skips unnecessary SPS occasions, then power consumption is reduced, but data reception latency may increase
Solution Approach 1:
The UE uses feedback mechanisms through the SDR timer and reception history tracking to dynamically adjust monitoring behavior, reducing power consumption by skipping unnecessary occasions while maintaining low latency through timely detection of actual data transmission opportunities
Solution Approach 2:
The patent applies dynamics by making the UE's monitoring behavior adaptive and flexible based on real-time conditions, allowing the UE to dynamically skip occasions when appropriate while maintaining readiness for actual data reception, thus balancing power savings with latency performance
3Reliability
If the UE monitors PDCCH continuously for subsequent data, then data reception reliability is improved, but device complexity increases
Solution Approach 1:
The UE performs preliminary evaluation using the SDR timer and reception history to determine whether PDCCH monitoring is necessary before actually monitoring, thereby reducing unnecessary monitoring operations while maintaining reliable data reception through targeted monitoring of relevant occasions
Solution Approach 2:
The patent applies partial action by monitoring only the necessary portion of PDCCH occasions rather than continuously monitoring all occasions, thus reducing device complexity and power consumption while maintaining adequate data reception reliability through selective monitoring of relevant occasions
Data Source
AI summary
The present disclosure relates to a method of performing operations for a User Equipment (UE) in a wireless communication system. In particular, the method includes receiving information on a semi persistent scheduling (SPS) group comprising a first SPS configuration and a second SPS configuration, and a subsequent data reception (SDR) timer related to the SPS group, wherein the first SPS configuration comprises a plurality of first SPS occasions and the second SPS configuration comprises a plurality of second SPS occasions; based on a data unit being received on a first SPS occasion of the plurality of first SPS occasions, starting the SDR timer, wherein receptions on a second SPS occasion located after the first SPS occasion within a SPS group period are skipped; and based on the SDR timer being running, monitoring a PDCCH for receiving a first subsequent data unit of the data unit.