Sidelink Sensing via Control Information Decoding
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing sidelink control information and channel state information, particularly in discontinuous reception configurations, which affect power consumption and resource allocation in sidelink communications.
Innovation Solution
The implementation of methods and apparatuses for sidelink control information based sensing, including receiving discontinuous reception configurations, performing sensing based on sidelink control information decoding and reference signal measurements, and managing hybrid automatic repeat request feedback options and channel state information reporting, to optimize resource usage and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If discontinuous reception configuration is used to save power, then power consumption is reduced, but sensing accuracy and resource allocation reliability deteriorate
Solution Approach 1:
The system performs sensing operations in advance during active periods to gather channel state information and resource availability data before entering sleep mode. This preliminary sensing enables reliable resource allocation decisions to be made without requiring continuous monitoring, thus maintaining reliability while reducing power consumption during inactive periods.
Solution Approach 2:
The discontinuous reception configuration implements periodic sensing and monitoring at specific intervals rather than continuous operation. The system alternates between active sensing periods and sleep periods, performing necessary measurements periodically to maintain adequate resource allocation reliability while significantly reducing average power consumption compared to continuous monitoring.
2Reliability
If sensing window is extended to improve resource allocation, then resource allocation quality improves, but latency increases
Solution Approach 1:
The sensing window is positioned to perform sensing operations in advance of actual resource allocation decisions. By gathering channel state information and identifying suitable resources beforehand, the system prepares allocation data提前, enabling faster actual allocation when needed without extending the critical decision latency.
Solution Approach 2:
The sensing window is divided into multiple sub-windows or phases, allowing the system to perform different sensing operations at different times. This segmentation enables the system to gather necessary information over an extended period while making timely allocation decisions based on accumulated data, balancing comprehensive sensing with low latency.
3Use of energy by moving object
If hybrid automatic repeat request feedback option 1 is used, then power saving improves, but communication reliability deteriorates
Solution Approach 1:
Hybrid automatic repeat request feedback option 1 enables the receiving device to autonomously determine whether to send feedback based on successful decoding without requiring explicit feedback requests. This self-service mechanism reduces feedback overhead and power consumption while maintaining adequate reliability through the hybrid ARQ retransmission capability that operates without continuous feedback.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for sidelink control information based sensing. One method includes receiving at a first user equipment, a first discontinuous reception configuration. The first discontinuous reception configuration includes a first slot offset, a first on-duration, a first periodicity, or some combination thereof. The method includes receiving an indication to perform sensing in a sensing window. The sensing window includes an active time of the first discontinuous reception configuration. The method includes performing the sensing based on sidelink control information decoding and a reference signal received power measurement of a demodulation reference signal of a second user equipment.