Sidelink Unlicensed COT Sharing with CP Timing Gaps
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Solution Overview
Problem
Current SL communication techniques fail to establish clear signal timing standards, types of signaling and channels, and transmission power thresholds for SL-U COT sharing scenarios, leading to inadequate communication between UEs.
Innovation Solution
Implementing cyclic prefix extensions for appropriate signal timing and gaps, using types of signals such as unicast, broadcast, and groupcast, and channels like PSSCH, PSCCH, and PSFCH, along with transmission power thresholds for SL-U COT sharing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If SL-U COT sharing is implemented without clear signal timing standards, then device complexity is reduced, but communication reliability deteriorates
Solution Approach 1:
The patent applies parameter changes by defining specific timing gap values (e.g., 16 microseconds, 25 microseconds) for cyclic prefix extensions and signal transmissions. These standardized parameter values resolve the contradiction by providing clear timing standards that ensure communication reliability while maintaining manageable device complexity through standardized rather than arbitrary values.
Solution Approach 2:
The patent segments the channel occupancy time into distinct transmission phases with specific gap durations between them. By dividing the COT into structured segments with defined timing characteristics, the patent establishes clear signal timing standards that improve reliability without excessively increasing device complexity.
2Ease of operation
If transmission power thresholds are not established for SL-U COT sharing, then ease of operation is improved, but communication efficiency deteriorates
Solution Approach 1:
The patent establishes specific transmission power thresholds as standardized parameters for SL-U COT sharing. These defined power levels resolve the contradiction by providing clear operational guidelines that maintain ease of use while improving communication efficiency through optimized power consumption and transmission performance.
3Measurement precision
If clear channel assessment types are established for SL-U COT sharing, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent defines specific gap duration parameters (16 microseconds, 25 microseconds) for cyclic prefix extensions that enable precise channel assessment. These standardized parameter definitions improve measurement precision while controlling device complexity through standardized rather than custom-assessment mechanisms.
Data Source
AI summary
The techniques described herein include solutions for signal timing and gaps for sidelink (SL) communications in the unlicensed spectrum (SL-U) within channel occupancy time (COT) sharing scenarios. Cyclic prefix (CP) extensions may be used to implement appropriate signal timing and gaps. Also described herein are types of signals (e.g., unicast, broadcast, multicast, and groupcast) and channels (e.g., physical SL shared channel (PSSCH), physical SL control channel (PSCCH), and physical SL feedback channel) that may be used in SL-U COT sharing scenarios, and solutions for transmission power thresholds for SL-U COT sharing scenarios.