Sidelink Communication With COT-Based Resource Allocation
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Solution Overview
Problem
Existing wireless communication systems face challenges in supporting sidelink communication in unlicensed bands and managing channel occupancy times effectively, which affects data transmission efficiency and resource utilization.
Innovation Solution
A method and device for performing sidelink communication in a wireless communication system that involves selecting resources based on a SL resource pool, transmitting UCI to a base station, receiving DCI for SL resource allocation, and conducting subsequent SL transmissions within a channel occupancy time (COT) duration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If sidelink communication is performed in unlicensed bands using autonomous resource selection by terminals, then device autonomy and reduced base station overhead are improved, but resource allocation efficiency and interference management deteriorate
Solution Approach 1:
The resource pool is segmented into multiple SL resource pools configured by the base station, allowing terminals to autonomously select from predefined segments while the base station maintains overall control through configuration parameters and COT management
Solution Approach 2:
The system dynamically switches between autonomous terminal selection within COT and base station-controlled resource allocation based on channel conditions and traffic requirements, optimizing both automation and efficiency
2Adaptability or versatility
If terminals autonomously select SL resources from a resource pool, then resource selection flexibility is improved, but resource collision and interference increase
Solution Approach 1:
The base station performs preliminary channel access and acquires COT before allocating SL resources to terminals, ensuring that resources are pre-validated for collision-free transmission within the COT duration
Solution Approach 2:
The base station acts as an intermediary that coordinates terminal resource selections by configuring resource pools and providing DCI-based allocations, mediating between terminal autonomy and collision avoidance
3Ease of operation
If base station acquires channel occupancy time for uplink transmission, then downlink control capability is improved, but sidelink transmission opportunities are reduced
Solution Approach 1:
The base station's COT acquisition mechanism is extended to serve dual purposes: traditional uplink/downlink communication and sidelink communication, allowing a single COT to support multiple transmission types simultaneously
Solution Approach 2:
The system adds a sidelink dimension to the traditional uplink-downlink COT structure, enabling resource allocation in a new domain while maintaining the base station's control framework
Data Source
AI summary
A method and apparatus for performing sidelink communication in a wireless communication system are disclosed. The method performed by a terminal in a wireless communication system, according to an embodiment of the present disclosure, comprises the steps of: performing, on the basis of a sidelink (SL) resource pool, a first SL transmission on a resource selected by the terminal; transmitting, to a base station, uplink control information (UCI) related to the first SL transmission; receiving, from the base station, downlink control information (DCI) including information related to SL resource allocation; and performing a second SL transmission on the basis of the SL resource allocation, wherein the information related to the SL resource allocation may indicate a resource within a channel occupancy time (COT) duration of the base station.