Sidelink DRX Timers Per Source-Destination Pair for Groupcast
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink discontinuous reception (DRX) timers due to the complexity of associating multiple source IDs with a destination ID in groupcast or broadcast scenarios, leading to inefficient resource allocation and increased power consumption.
Innovation Solution
Implementing sidelink DRX timers that are operated per pair of source ID and destination ID, or per destination ID and each source ID associated with a quality of service (QoS) profile, to optimize resource allocation and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If DRX timers are operated per destination ID only, then device complexity is reduced, but resource allocation efficiency deteriorates due to inability to distinguish between multiple source IDs
Solution Approach 1:
The patent segments the DRX timer operation into separate instances for each source ID-destination ID pair. Instead of using a single shared timer per destination ID, the system creates distinct timer instances (e.g., timer1 for source1-dest1, timer2 for source2-dest1) that can be independently controlled. This segmentation enables precise resource allocation to specific source-destination pairs while maintaining manageable complexity through structured organization.
2Productivity
If DRX timers are operated per source ID and destination ID pair, then resource allocation efficiency is improved, but device complexity increases due to multiple timer instances
Solution Approach 1:
The patent divides the DRX timer into separate instances indexed by source ID and destination ID pairs. Each timer instance (e.g., timer[source_id][dest_id]) operates independently to manage DRX cycles for specific communication pairs, enabling efficient resource allocation while organizing complexity through systematic indexing and structured memory allocation.
Solution Approach 2:
The patent implements a universal timer management framework where a single timer structure can serve multiple source ID-destination ID pairs through indexing mechanisms. The timer system is designed to accommodate any number of active pairs by allocating memory and initializing timers on-demand, providing multi-functional capability that reduces overall system complexity despite having multiple timer instances.
3Reliability
If DRX timers are operated per QoS profile, then service quality is improved, but device complexity increases due to multiple timer configurations
Solution Approach 1:
The patent applies different DRX timer configurations based on the QoS profile of each source ID-destination ID pair. Instead of using a single uniform timer setup, the system selects and applies appropriate timer parameters (e.g., onDuration, cycleTime) according to the specific QoS requirements of each communication pair, enabling differentiated service quality while managing complexity through profile-based configuration.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting (Tx) user equipment (UE) may perform, to a receiving (Rx) UE, a first sidelink transmission in an on duration of a sidelink discontinuous reception (DRX) cycle associated with a sidelink DRX configuration. The Tx may activate a sidelink DRX timer based at least in part on the sidelink DRX configuration, wherein the sidelink DRX configuration is associated with a destination identifier (ID) and one or more source IDs are associated with the destination ID, and wherein the sidelink DRX timer is operated per a pair of source ID and destination ID. Numerous other aspects are described.