Sidelink Channel Access Priority for Unlicensed Spectrum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of accessing a channel in an unlicensed spectrum for sidelink transmission systems, such as NR V2X communication, is not adequately addressed by existing technologies, particularly in terms of improving the success rate of channel access.
Innovation Solution
A method for channel access in sidelink devices that determines a channel access priority based on sidelink priority or resource configuration, allowing for improved channel access success rates by using predefined or network-configured parameters, and includes sharing channel occupancy time information with other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If terminals use LBT mode to access unlicensed spectrum in sidelink transmission, then spectrum sharing is enabled, but channel access success rate deteriorates due to contention and collision
Solution Approach 1:
The patent applies preliminary action by performing channel sensing and priority-based resource reservation before actual data transmission. Devices sense the channel state in advance and reserve resources based on their priority levels, which reduces contention and collision during the actual transmission phase, thereby improving channel access success rate while maintaining spectrum sharing capability
Solution Approach 2:
The patent changes the parameter of channel access priority by introducing priority-based LBT mechanisms and dynamic resource allocation parameters. Different priority levels are assigned to different services or devices, allowing high-priority traffic to access the channel more frequently or with shorter backoff times, thus improving overall channel access success rate while maintaining fair spectrum sharing
2Reliability
If channel access priority is determined dynamically, then channel access success rate improves, but device complexity increases
Solution Approach 1:
The patent changes the parameter of channel access priority from static to dynamic, allowing devices to adjust their priority levels based on channel conditions, service requirements, and resource availability. This dynamic parameter adjustment improves channel access success rate by adapting to varying conditions, while the complexity is managed through standardized priority levels and pre-configured rules
Solution Approach 2:
The patent implements feedback mechanisms where devices monitor channel access outcomes, channel state, and resource utilization, then adjust their priority levels and access parameters accordingly. This closed-loop control improves channel access success rate by learning from past experiences, while the feedback processing is simplified through predefined adjustment rules and thresholds
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
Provided in the present application are a channel access method, and a device and a storage medium, which can be applied to a sidelink communication system. The method comprises: a sidelink device determining a channel access priority according to a sidelink priority or sidelink resource configuration information; and performing channel access according to a channel access parameter corresponding to the determined channel access priority, such that the success rate of accessing a channel by means of the sidelink device is improved. The sidelink device can further determine the occupancy duration of a shared channel according to the sidelink priority or the sidelink resource configuration information, and can send, to a peer device, indication information for indicating the occupancy duration of the shared channel, such that a second device can determine a channel access type according to the indication information, thereby improving the success rate of accessing a channel by means of the peer device.