Sidelink Resource Coordination via Channel Sensing
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently coordinating sidelink resources between user equipment (UEs) without the assistance of a base station, leading to potential resource collisions and increased signaling latency.
Innovation Solution
A method where a first UE selects subchannels for transmitting information based on channel sensing and transmits sidelink control information (SCI) to indicate available subchannels and data transmission occasions, allowing for autonomous resource coordination with other UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UEs autonomously coordinate sidelink resources without base station assistance, then flexibility and communication efficiency are improved, but resource collisions and signaling latency increase
Solution Approach 1:
The patent applies preliminary action by having UEs perform channel sensing and resource selection in advance before actual data transmission. The first UE senses the channel, selects appropriate subchannels and transmission occasions, and transmits SCI indicating these resources before other UEs use them. This advance preparation reduces the likelihood of resource collisions while maintaining autonomous operation flexibility.
Solution Approach 2:
The patent implements feedback mechanisms where UEs transmit SCI containing resource allocation information that other UEs can sense and use to adjust their own resource selections. This feedback loop allows autonomous UEs to coordinate implicitly through shared channel information, improving resource collision avoidance without requiring base station control.
2Loss of energy
If UEs autonomously select subchannels for coordination information, then signaling resources are conserved, but resource coordination complexity increases
Solution Approach 1:
The patent applies self-service by enabling UEs to autonomously select and coordinate their own sidelink resources without base station assistance. The first UE independently performs channel sensing, selects subchannels for coordination information, and transmits SCI with resource indications. This self-service approach conserves signaling resources by eliminating the need for base station-controlled resource allocation while managing coordination complexity through standardized sensing and selection procedures.
3Measurement precision
If channel sensing is performed for subchannel selection, then resource coordination accuracy is improved, but time and processing overhead increase
Solution Approach 1:
The patent applies partial action by having UEs perform channel sensing on a selective basis rather than continuously monitoring all possible subchannels. The first UE senses the channel to determine available resources for coordination information, performing sensing only where and when needed based on traffic requirements and channel conditions. This approach maintains resource coordination accuracy while reducing the time and processing overhead associated with comprehensive channel sensing.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may select, based at least in part on channel sensing, one or more subchannels for transmitting information for coordinating sidelink resources with one or more other UEs. The first UE may transmit, to at least a second UE, sidelink control information (SCI) that indicates the one or more subchannels and one or more data transmission occasions in which the information is to be transmitted. Numerous other aspects are described.