CAPC-Based Sidelink Transport Block Selection for Low-Latency Traffic
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Solution Overview
Problem
The challenge in wireless communication systems is to provide a method and device for configuring a transport block (TB) for sidelink resource transmission based on channel access priority class (CAPC) to support advanced mobile communication requirements such as accommodating explosive data traffic, high transmission rates, and low latency.
Innovation Solution
A method for sidelink communication involves selecting a destination based on a CAPC value, configuring a TB using selected logical channels, and transmitting the TB to other UEs, with HARQ-ACK information being transmitted through a physical sidelink feedback channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channel access priority class (CAPC) based resource allocation is implemented for sidelink communication, then resource allocation efficiency and latency are improved, but system complexity and configuration overhead increase
Solution Approach 1:
The patent applies parameter changes by introducing CAPC values as a new parameter to differentiate channel access priorities. Different CAPC values (1-4) correspond to different priority levels, allowing the system to dynamically adjust resource allocation based on traffic requirements. This resolves the contradiction by providing a structured parameter-based approach that improves efficiency while maintaining manageable system complexity through standardized priority levels.
Solution Approach 2:
The patent segments the sidelink resource allocation into distinct priority classes based on CAPC values. Each CAPC level (1-4) represents a segmented category for different traffic types, enabling differentiated resource allocation. This segmentation improves resource allocation efficiency by prioritizing critical traffic while keeping the system complexity manageable through clear categorization.
2Quantity of substance
If multiple logical channels are selected and configured for different destinations based on CAPC, then data traffic accommodation and transmission rate are improved, but device complexity and processing overhead increase
Solution Approach 1:
The patent applies local quality by configuring different logical channels with specific CAPC values tailored to their respective destinations and traffic types. Each logical channel is locally optimized for its specific purpose (e.g., SL-CH0 for unicast, SL-CH1 for groupcast, SL-CH2 for broadcast), allowing the system to accommodate diverse data traffic requirements while managing device complexity through specialized channel configurations.
Solution Approach 2:
The patent implements dynamics by enabling the UE to dynamically select and configure multiple logical channels based on destination requirements and CAPC values. The system can adaptively activate different logical channels (SL-CH0 to SL-CH7) depending on the specific communication scenario, traffic priority, and destination type, thereby improving data traffic capacity while avoiding the need for permanently configured complex channel structures.
3Reliability
If HARQ-ACK feedback is transmitted through physical sidelink feedback channel, then communication reliability is improved, but transmission latency and feedback overhead increase
Solution Approach 1:
The patent applies periodic action by implementing HARQ-ACK feedback transmission at specific intervals through the physical sidelink feedback channel. The feedback mechanism operates periodically, allowing the receiving UE to send acknowledgments at predetermined times, which improves communication reliability through structured feedback while managing latency by establishing regular feedback cycles rather than continuous feedback requirements.
Data Source
AI summary
A method and device for performing sidelink communication in a wireless communication system are disclosed. A method by which a first terminal performs sidelink communication, according to one embodiment of the present disclosure, comprises the steps of: selecting a destination on the basis of a channel access priority class (CAPC) value corresponding to a specific selected SL grant; selecting at least one logical channel for the selected destination; constructing at least one transport block (TB) on the basis of the selected at least one logical channel; and transmitting the at least one TB to at least one other terminal corresponding to the destination through one or more transceivers.