Sidelink Burst Transmission with Remaining Occupancy Signaling
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Solution Overview
Problem
The existing 3GPP 5G NR technology lacks specific details on channel access procedures for sidelink transmission using unlicensed spectrum, leading to potential data loss and inefficiencies in sidelink communication due to unclear channel occupancy durations.
Innovation Solution
Implementing a method for sidelink transmission that includes performing a channel access procedure, transmitting sidelink control information with an indicator for the remaining channel occupancy duration, and ensuring data transmission and feedback within this duration to avoid channel loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel access procedure is performed for sidelink transmission on unlicensed spectrum, then channel occupancy can be initiated, but specific details of the procedure are not defined leading to potential data loss
Solution Approach 1:
The patent defines specific parameters for the channel access procedure including channel occupancy time (e.g., 2ms, 4ms, 6ms, or 10ms), priority classes (1-4), and sensing window durations. These parameter definitions resolve the ambiguity in the channel access procedure while maintaining reliability through standardized values.
Solution Approach 2:
The channel access procedure is segmented into distinct phases: sensing phase (monitoring channel for duration based on priority class), channel access phase (attempts to access channel), and channel occupancy phase (transmits data for defined duration). This segmentation makes the complex procedure manageable and implementable.
2Productivity
If channel occupancy duration is extended to transmit more data, then transmission efficiency improves, but risk of channel loss and data loss increases
Solution Approach 1:
The channel occupancy time is defined as dynamic based on priority class and channel conditions. Higher priority classes (1-4) allow for different sensing window durations and occupancy times, enabling the system to adaptively balance transmission efficiency and reliability based on service requirements.
Solution Approach 2:
The UE performs a sensing phase before channel access, monitoring the channel for a duration determined by priority class. This preliminary action allows the UE to assess channel conditions and select appropriate occupancy duration, preventing channel loss by ensuring the channel is suitable for extended occupancy.
3Adaptability or versatility
If channel access procedure details are not defined, then flexibility is maintained, but sidelink communication efficiency deteriorates due to unclear occupancy durations
Solution Approach 1:
The patent establishes a framework with configurable parameters including priority classes (1-4), channel occupancy times (2ms, 4ms, 6ms, 10ms), and sensing window durations. This parameter-based approach maintains flexibility for different service types while providing defined procedures to ensure efficient communication.
Data Source
AI summary
The present application relates to a method and an apparatus for sidelink burst transmission. The method includes: performing a channel access procedure for initiating a channel occupancy for sidelink transmission; transmitting sidelink control information (SCI) to another apparatus within the channel occupancy; wherein the SCI includes an indicator indicating a remaining duration of the channel occupancy; and transmitting sidelink data associated with the SCI to the another apparatus without exceeding the remaining duration of the channel occupancy.