Sidelink S-SSB Resource Allocation for Beam Training
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Solution Overview
Problem
In sidelink communication systems, simultaneous transmission of synchronization signal blocks (S-SSBs) by multiple terminals on the same time-frequency resource leads to conflicts, impairing the effectiveness of beam training due to differing contents being transmitted.
Innovation Solution
The solution involves sending and receiving S-SSBs on separate time-frequency resources within a resource pool, with feedback information exchanged to determine optimal beam directions, thereby avoiding conflicts and enhancing beam training efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple terminals send S-SSBs on the same time-frequency resource to improve resource utilization, then resource efficiency is improved, but transmission conflicts occur and beam training effectiveness deteriorates
Solution Approach 1:
The patent segments the resource pool into multiple resource sets, where each resource set contains multiple time-frequency resources. Terminals are allocated different resource sets for S-SSB transmission, which divides the originally conflicting single resource into multiple non-conflicting resources. This segmentation allows multiple terminals to transmit simultaneously without interference while maintaining resource utilization efficiency.
2Loss of time
If multiple terminals transmit S-SSBs simultaneously on the same resource to reduce training time, then beam training speed is improved, but transmission conflicts cause measurement accuracy to deteriorate
Solution Approach 1:
The patent employs preliminary action by having terminals perform sensing operations before S-SSB transmission to identify available resources. Terminals sense the resource pool in advance, detect occupied resources, and select from pre-configured resource sets that are likely to be available. This preliminary sensing and resource selection process enables simultaneous transmissions while avoiding conflicts, thus maintaining both speed and accuracy.
3Adaptability or versatility
If terminals use contention-based resource selection to improve access flexibility, then system adaptability is improved, but resource conflicts increase and training reliability deteriorates
Solution Approach 1:
The patent changes the parameter of resource allocation from completely random contention-based selection to selection from pre-configured resource sets. Each terminal is assigned specific resource sets with predetermined time-frequency resources, which reduces the probability of collision while maintaining the flexibility of contention-based access. This parameter change balances adaptability and reliability by combining structured resource allocation with contention-based access.
Data Source
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AI summary
This application provides a communication method and a related apparatus, to avoid a sending conflict between a plurality of terminals and implement beam training. The method includes: A first terminal sends N sidelink synchronization signal blocks S-SSBs to a second terminal on N first time-frequency resources, where the N first time-frequency resources are located within a resource pool, and N is an integer greater than 1. The second terminal sends feedback information from the second terminal to the first terminal on one or more of M second time-frequency resources, where the feedback information indicates measurement results of one or more S-SSBs in the N S-SSBs, the N second time-frequency resources are located in the resource pool, M is an integer greater than 1, and M is less than or equal to N.