Second Stage Sidelink Control Information Assistance Resource Set
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Solution Overview
Problem
Current NR Sidelink technologies lack a method for user equipment (UE) to send an assistance resource set effectively for resource selection in Mode2 sidelink communication, which is crucial for enhancing transmission reliability and reducing latency in V2X and public safety applications.
Innovation Solution
The implementation of a second stage sidelink control information (SCI) that includes specific information fields and bit sizes for indicating time and frequency domain resources, allowing UE A to send an assistance resource set to UE B, enabling precise indication and selection of resources for data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a method for sending assistance resource set is implemented in NR Sidelink Mode2, then resource selection accuracy and transmission reliability are improved, but device complexity and signaling overhead increase
Solution Approach 1:
The assistance resource set information is segmented into multiple information fields within the second stage SCI, including first information field for time domain resources, second information field for frequency domain resources, and optional third information field for resource availability. This segmentation allows structured transmission of complex resource information while maintaining manageable processing complexity.
Solution Approach 2:
User equipment A performs preliminary analysis and determines the assistance resource set before transmission to user equipment B. This preliminary action includes identifying suitable time and frequency resources, determining resource availability, and preparing the assistance resource set information in advance, which improves resource selection accuracy while enabling efficient one-time transmission.
2Measurement precision
If detailed time and frequency domain resource indication is provided in assistance resource set, then resource selection precision is improved, but signaling overhead increases
Solution Approach 1:
The patent applies different indication granularities to different resource dimensions based on local requirements. The first information field uses a granularity adapted to time domain characteristics, while the second information field uses a granularity adapted to frequency domain characteristics. This local quality approach provides precise resource indication where needed while minimizing signaling overhead in other dimensions.
Solution Approach 2:
The patent dynamically adjusts the bit size of information fields based on the actual number of slots and subchannels. The first bit size is determined based on the number of slots and indication granularity of the first information field, while the second bit size is determined based on the number of subchannels and indication granularity of the second information field. This parameter adaptation reduces signaling overhead while maintaining sufficient precision.
3Adaptability or versatility
If assistance resource set is sent frequently to maintain resource selection accuracy, then resource allocation adaptability is improved, but latency and energy consumption increase
Solution Approach 1:
Instead of continuous transmission, the assistance resource set is transmitted periodically or event-triggered when resource conditions change. This periodic action maintains resource allocation adaptability by providing updated information when needed while avoiding unnecessary transmissions that would increase latency and energy consumption.
Solution Approach 2:
User equipment B autonomously maintains and updates its resource selection based on the received assistance resource set information, combining it with local channel conditions and traffic requirements. This self-service approach reduces the need for frequent assistance information updates, thereby reducing latency and energy consumption while maintaining adaptability.
Data Source
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AI summary
The present disclosure relates to an auxiliary resource set sending method and apparatus, an auxiliary resource set receiving method and apparatus, and a storage medium. The auxiliary resource set sending method is applied to a first device, and comprises: determining second-stage sidelink control information, wherein the second-stage sidelink control information comprises an information domain for indicating auxiliary resources; and sending the second-stage sidelink control information. By means of the present disclosure, the sending and indication of an auxiliary resource set can be implemented on the basis of second-stage sidelink control information.