Sidelink Communication CAPC Configuration for Lower Latency
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Solution Overview
Problem
The existing wireless communication systems face challenges in efficiently managing sidelink communication resources, particularly in determining channel access priority classes for sidelink resource transmission, which affects data transmission efficiency and latency.
Innovation Solution
A method and device for configuring transport blocks for sidelink resource transmission based on channel access priority classes, utilizing system information blocks and pre-configuration information to set priority classes for sidelink radio bearers, and adjusting priority values based on PQI indicators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel access priority classes are configured for sidelink radio bearers, then data transmission efficiency is improved, but system complexity increases
Solution Approach 1:
The patent applies parameter changes by configuring channel access priority classes (CAPCs) with specific priority values (1-4) for different sidelink radio bearers. The system dynamically adjusts transmission behavior based on these priority parameters, allowing higher priority bearers to access the channel more readily while lower priority bearers wait, thereby improving overall data transmission efficiency through structured parameter-based control
Solution Approach 2:
The patent segments the sidelink communication system into different radio bearers with distinct priority classes. By dividing the traffic into separate bearers (e.g., priority bearers and non-priority bearers), the system can manage each segment independently with appropriate access control, reducing the complexity of managing all traffic uniformly while improving efficiency through differentiated service
2Loss of time
If priority classes are assigned to sidelink radio bearers, then latency is reduced, but configuration complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring priority classes and their associated parameters before actual data transmission occurs. The network side device sets up the priority structure in advance, so that when data needs to be transmitted, the UE can immediately apply the appropriate priority handling without complex real-time configuration, thereby reducing latency while keeping configuration management straightforward
3Productivity
If CAPC values are configured based on SIB or pre-configuration, then resource allocation efficiency is improved, but information processing complexity increases
Solution Approach 1:
The patent applies self-service by enabling the UE to autonomously determine and apply the appropriate CAPC values based on pre-configured information or received SIBs. The UE independently processes the configuration information and makes decisions about which priority class to use for each bearer, eliminating the need for continuous network control and reducing information processing complexity at the network side while maintaining efficient resource allocation
Data Source
AI summary
A method and a device for performing sidelink communication in a wireless communication system are disclosed. The method by which a first terminal performs sidelink communication, according to one embodiment of the present disclosure, comprises receiving a system information block (SIB) from a base station; and transmitting, on the basis that the SIB or pre-configuration information sets a first channel access priority class (CAPC) value for the specific SL radio bearer, data of a specific SL radio bearer to at least one other terminal by using the first CAPC value, wherein the data of the specific SL radio bearer is transmitted, on the basis that the SIB or pre-configuration information does not set the first CAPC value for the specific SL radio bearer, to at least one other terminal by using a second CAPC value.