V2X Sidelink Resource Pool Switching for Demand Spikes
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Solution Overview
Problem
In LTE and NR systems, V2X communication scenarios face challenges with resource allocation inefficiencies, leading to insufficient resources for increased sidelink data transmission demands, which can disrupt normal service performance due to semi-static allocation methods.
Innovation Solution
Implementing a dual resource pool system, comprising a main and supplementary resource pool, where terminals can dynamically request resources from the supplementary pool based on need, using SR and BSR mechanisms to ensure adequate allocation for sidelink data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semi-static resource allocation is used for sidelink data transmission, then resource pool configuration is simple and stable, but the system cannot dynamically adjust resources when V2X service demand suddenly increases
Solution Approach 1:
The resource pool is segmented into two distinct parts: a first resource pool configured via semi-static RRC signaling for stable baseline allocation, and a second resource pool configured via dynamic MAC CE signaling for flexible adjustment. This segmentation allows the system to combine the stability of semi-static configuration with the adaptability of dynamic allocation, resolving the contradiction between configuration simplicity and resource allocation flexibility.
Solution Approach 2:
The patent introduces dynamic resource pool configuration through MAC CE signaling that can adjust the second resource pool in real-time based on V2X service demand. This dynamic mechanism enables the system to adapt resource allocation to changing traffic conditions while maintaining the stable first resource pool, thus achieving both adaptability and controlled complexity.
2Quantity of substance
If semi-static resource allocation is used, then configuration overhead is reduced, but resource sufficiency cannot be guaranteed when sidelink transmission demand increases
Solution Approach 1:
By dividing the resource pool into first and second resource pools with different configuration methods, the system can guarantee a baseline quantity of resources through semi-static configuration while providing additional resources through dynamic allocation when needed, without incurring full signaling overhead for the entire resource pool.
Solution Approach 2:
The patent applies partial dynamic configuration by only dynamically adjusting the second resource pool portion that is needed to meet increased demand, rather than dynamically configuring the entire resource pool. This partial action approach provides sufficient resources when demand increases while minimizing the signaling overhead associated with dynamic reconfiguration.
3Productivity
If dynamic resource adjustment is implemented, then resource sufficiency for increased V2X services is ensured, but the allocation mechanism becomes more complex
Solution Approach 1:
The patent implements dynamic resource adjustment through MAC CE signaling for the second resource pool, enabling real-time adaptation to V2X service demand and improving sidelink transmission efficiency. The complexity is managed by maintaining semi-static configuration for the first resource pool, thus achieving dynamic productivity improvement with controlled mechanism complexity.
Solution Approach 2:
The patent merges semi-static RRC configuration and dynamic MAC CE configuration into a unified dual resource pool framework. This combination allows the system to leverage the simplicity of semi-static allocation for the first resource pool while incorporating dynamic adjustment capabilities for the second resource pool, achieving high productivity with balanced complexity.
Data Source
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AI summary
This application provides a communication method and apparatus. In the method, a terminal may obtain a main resource pool used to transmit sidelink data and a supplementary resource pool used to transmit the sidelink data. The terminal may request, based on a requirement of the terminal, a resource in the main resource pool or a resource in the supplementary resource pool to transmit the sidelink data. For example, when the resource in the main resource pool cannot meet a data transmission requirement of a large quantity of V2X services, the terminal may request the resource in the supplementary resource pool to transmit the sidelink data. This ensures that the V2X services are normally performed.