Sidelink DRX Additional Operating Windows for Sensing
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Solution Overview
Problem
In sidelink (SL) communication, especially for mode 2 UEs, there is a challenge in correlating SL DRX cycles due to the lack of controlling gNB, leading to low correlation between different UEs' on-duration overlaps, which affects sensing performance during semi-static inactive durations.
Innovation Solution
A communication apparatus and method that allocate one or more additional operating windows between SL DRX cycles to enable extended sensing windows, allowing for improved SL signal reception and transmission by switching from an 'OFF' to an 'ON' state during semi-static inactive durations using timer parameters like BackwardTimer and ForwardTimer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If SL DRX cycles are semi-statically configured for mode 2 UEs, then power consumption is reduced through periodic inactive durations, but sensing performance deteriorates due to low correlation between different UEs' on-duration overlaps
Solution Approach 1:
The patent introduces dynamic adjustment mechanisms for SL DRX configurations, allowing UEs to adaptively modify their on-duration and offset values based on sensing requirements and channel conditions. This enables mode 2 UEs to dynamically correlate their active periods with potential transmitters while maintaining power-saving benefits through controlled inactive durations.
Solution Approach 2:
The patent modifies key SL DRX parameters including on-duration length, offset values, and periodicity to improve sensing correlation. By adjusting these parameters based on traffic patterns and sensing needs, the system achieves better alignment between receiving and transmitting UEs without sacrificing power efficiency.
2Reliability
If SL DRX on-duration is extended to improve sensing correlation, then sensing performance improves, but power consumption increases due to longer active durations
Solution Approach 1:
The patent applies partial action by extending on-duration only during periods when sensing is actually needed, rather than maintaining continuously extended active periods. UEs can selectively activate extended listening windows based on detected traffic patterns or scheduling information, achieving improved sensing correlation only when beneficial while minimizing unnecessary power consumption.
3Reliability
If additional operating windows are allocated between SL DRX cycles, then sensing opportunities increase, but device complexity increases due to additional state management
Solution Approach 1:
The patent segments the additional operating windows into distinct types with specific functions - such as sensing windows, measurement windows, and buffer windows - each with defined entry and exit conditions. This segmentation simplifies state management by providing clear rules for transitioning between different operational modes rather than requiring complex continuous decision-making.
Data Source
AI summary
The present disclosure provides a communication apparatus and a communication method for allocating one or more additional operating windows for a reception or a transmission of a sidelink signal. The communication apparatus comprises circuitry which, in operation, is configured to allocate one or more additional operating windows between a first operating window and a second operating window for a reception or a transmission of a sidelink signal, and a transceiver which, in operation, transmit or receive a sidelink signal within the one or more additional operating window.