Sidelink Channel Mapping for Low-Resource PSCCH Transmission
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Solution Overview
Problem
The rapidly growing volume and frequency of sidelink (SL) communication in wireless communication systems require stable support methods to efficiently utilize limited radio resources for direct communication between UEs.
Innovation Solution
A method and device for mapping physical control and shared channels within a resource pool, where the physical control channel is mapped to adjacent subchannels rather than the lowest index if the number of resource blocks is less than a preconfigured number, optimizing channel transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the physical control channel is mapped to the subchannel of the lowest index of the physical shared channel, then the mapping is simple and straightforward, but when the number of resource blocks is less than a preconfigured number, this causes insufficient resources for control channel transmission and reduces communication reliability
Solution Approach 1:
The patent implements dynamic channel mapping by making the PSCCH mapping location adaptive based on the available resource block count. When resource blocks are insufficient, the system dynamically switches from mapping to the lowest index subchannel to mapping to an adjacent subchannel with adequate resources, thereby maintaining both operational simplicity and transmission reliability under varying channel conditions
Solution Approach 2:
The system changes the mapping parameter (subchannel index) based on the resource block availability condition. By monitoring whether the number of resource blocks meets the preconfigured threshold, the system adjusts the PSCCH mapping location parameter to ensure sufficient resources are allocated for control channel transmission while maintaining efficient resource utilization
2Productivity
If more radio resources are allocated to support increasing sidelink communication volume, then communication capacity increases, but the limited nature of radio resources leads to resource exhaustion and reduced system efficiency
Solution Approach 1:
The patent applies partial action by allocating radio resources dynamically based on actual communication needs rather than providing full resources continuously. By mapping the PSCCH to adjacent subchannels only when resource blocks are insufficient, the system optimizes resource allocation to provide exactly what is needed for maintaining sidelink communication capacity without wasting available radio resources
Solution Approach 2:
The system dynamically adjusts resource allocation for sidelink communication by changing the PSCCH mapping strategy based on real-time resource block availability. This dynamic approach allows the system to maintain high communication capacity when resources are abundant while ensuring reliable control channel transmission when resources are constrained, thereby maximizing overall resource utilization efficiency
Data Source
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AI summary
ABSTRACT: A physical control channel for carrying information about subchannels of a physical shared channel in an SCI format is mapped to one of subchannels in a resource pool and transmitted. On the basis that the number of resource blocks available for transmission in a subchannel of the lowest index among the subchannels of the physical shared channel is less than a preconfigured number, the physical shared channel is mapped within an adjacent subchannel rather than the subchannel of the lowest index.