Sidelink Resource Pool Switching via Bandwidth Part Segmentation
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Solution Overview
Problem
In New Radio (NR) systems, the increased system bandwidth makes it challenging for terminal devices to efficiently switch between configured resource pools for sidelink communications, leading to suboptimal time-frequency resource allocation.
Innovation Solution
A resource pool switching method that uses indication information to allow terminal devices to switch between resource pools dynamically, ensuring sidelink communications occur on appropriate time-frequency resources by activating or deactivating Bandwidth Parts (BWP) and numerologies as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the system bandwidth is significantly increased in NR, then the capacity and performance of the network are improved, but the complexity of resource pool switching for terminal devices increases and time-frequency resource allocation becomes suboptimal
Solution Approach 1:
The patent divides the large system bandwidth into multiple Bandwidth Parts (BWPs), each BWP containing one or more resource pools. This segmentation allows terminal devices to operate on smaller, manageable frequency ranges rather than dealing with the entire system bandwidth, thereby reducing switching complexity while maintaining the benefit of large overall bandwidth
Solution Approach 2:
Different BWPs and resource pools are configured with different numerologies (subcarrier spacing, cyclic prefix lengths) optimized for specific service requirements. This local optimization allows terminal devices to switch to appropriate resource pools with suitable parameters for different communication scenarios, improving resource allocation efficiency without requiring complex switching across the entire bandwidth
2Adaptability or versatility
If multiple resource pools are configured for sidelink communications, then the flexibility and adaptability of resource allocation are improved, but the difficulty of switching between resource pools increases
Solution Approach 1:
The patent enables dynamic switching between BWPs and resource pools through network configuration and terminal device execution. The network can dynamically indicate which BWP or resource pool the terminal should use based on current communication conditions, while the terminal maintains the capability to switch between multiple configured options, achieving flexibility without permanent complexity
Solution Approach 2:
Different resource pools are associated with different numerology parameters (subcarrier spacing, cyclic prefix types). By changing the active BWP or resource pool, the terminal effectively changes the operational parameters to match different service requirements (eV2X, V2P, V2I, etc.), achieving adaptability through parameter switching rather than structural complexity
3Productivity
If Bandwidth Parts (BWP) and numerologies are dynamically activated or deactivated, then the optimization of time-frequency resource allocation is improved, but the overhead of management and switching increases
Solution Approach 1:
The network pre-configures multiple BWPs and resource pools with different numerologies before actual communication occurs. When switching is needed, the terminal simply activates a pre-configured option rather than creating new configurations on the fly, significantly reducing switching overhead time while maintaining the ability to optimize resource allocation for different services
Data Source
AI summary
Disclosed in the embodiments of the present application are a resource pool switching method, a terminal device and a communication device, the method comprising: a first terminal device acquiring first indication information; and the first terminal device, according to the first indication information, switching a sidelink resource pool from a first resource pool to a second resource pool. The method, terminal device and communication device of the embodiments of the present application facilitate improvement in the performance of sidelink communication.