Cross-RAT Sidelink Resource Control for Timing-Aligned UE Communication
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Solution Overview
Problem
The existing LTE-V2X technologies face challenges in managing sidelink resources effectively due to the lack of defined latency and timing offsets in inter-radio access technology (RAT) module communication, leading to unpredictable UE behavior and suboptimal network control.
Innovation Solution
Implementing a user equipment (UE) capable of reporting cross-RAT capabilities and inter-RAT signaling exchange, allowing network base stations to provide dynamic control and manage sidelink resources more effectively by specifying the timing offsets for NR and LTE modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate SL resource configurations are provided for each RAT, then SL resource allocation is straightforward and reliable, but SL resource overhead increases and system complexity increases
Solution Approach 1:
The patent applies universality by providing a single SL resource configuration that can be used across multiple RATs (e.g., NR and E-UTRA). Instead of maintaining separate resource pools for each RAT, the network configures one unified SL resource pool that serves all RATs, thereby reducing resource overhead while maintaining allocation reliability through RAT-specific parameter configurations within the unified structure
Solution Approach 2:
The patent applies segmentation by dividing the unified SL resource configuration into RAT-specific logical sections or parameters. While the physical resource pool is shared, the configuration includes separate parameter sets or indication mechanisms for different RATs, allowing the system to manage multiple RATs efficiently without duplicating entire resource configurations
2Ease of operation
If separate SL resource configurations are provided for each RAT, then SL resource management is simple, but device complexity and signaling overhead increase
Solution Approach 1:
The patent reduces device complexity by implementing a universal SL resource configuration structure that the UE can interpret for multiple RATs. The UE receives one configuration message containing SL resources that applies to all configured RATs, eliminating the need to process and manage separate configuration sets for each RAT, thereby simplifying UE implementation while maintaining RAT-specific functionality through parameter indicators
3Productivity
If SL resources are shared across multiple RATs, then SL resource efficiency improves and overhead is reduced, but resource allocation complexity and interference management difficulty increase
Solution Approach 1:
The patent applies local quality by allowing different portions or aspects of the shared SL resource configuration to have RAT-specific properties. While the overall resource pool is shared and efficient, specific parameters, resource blocks, or configuration elements within that pool can be designated or optimized for particular RATs, enabling efficient resource sharing while managing allocation complexity through localized RAT-specific controls
Data Source
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AI summary
An apparatus and a method of wireless communication of same capable of providing good sidelink (SL) system operation performance and saving SL resources are provided. A method of wireless communication of a user equipment includes receiving, from a base station, a sidelink resource configuration signaling for more than one radio access technology (RAT) and reporting to the base station that a UE capability supports cross-RAT control. This provides good sidelink (SL) system operation performance and saving SL resources.