V2X Resource Pool Frame Structure for LTE NR Coexistence
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Solution Overview
Problem
In vehicle-to-everything (V2X) networks, the coexistence of Long-Term Evolution (LTE) and New Radio (NR) devices faces challenges due to mismatched NR penetration rates between devices in different regions, leading to resource usage collisions and degraded performance.
Innovation Solution
Implementing a unified NR penetration rate and a resource pool frame structure that partitions communication resources between NR and LTE devices using time and/or frequency multiplexing schemes, allowing V2X devices to coordinate resource sharing and avoid collisions by determining and sharing NR penetration rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If LTE and NR devices share V2X resources in the same network, then resource utilization efficiency is improved, but resource usage collisions occur due to mismatched NR penetration rates between devices in different regions
Solution Approach 1:
The patent changes the parameter of NR penetration rate from device-specific local values to a unified network-wide value. The network device determines the NR penetration rate based on the proportion of NR-capable devices in the V2X network, and this unified parameter is used to configure resource pool frame structures that accommodate both LTE and NR devices, thereby preventing resource collisions while maintaining efficient resource utilization
Solution Approach 2:
The patent introduces dynamic adjustment of resource pool frame structures based on the determined NR penetration rate. The resource pool configuration is adapted dynamically to match the actual mix of LTE and NR devices in the network, allowing the system to optimize resource allocation continuously as device compositions change, thus preventing collisions while maximizing resource utilization efficiency
2Ease of operation
If a unified resource pool frame structure is configured for both LTE and NR devices, then resource sharing coordination is improved, but device complexity increases due to need to support multiple RATs
Solution Approach 1:
The patent introduces a network device as an intermediary that performs the complex task of determining NR penetration rates and configuring resource pool frame structures. This intermediary handles the complexity of multi-RAT coordination centrally, while individual V2X devices (both LTE and NR) can operate with simpler local logic based on the unified resource pool configuration provided by the network, thus improving resource sharing coordination without significantly increasing device complexity
Solution Approach 2:
The patent creates a universal resource pool frame structure that can accommodate both LTE and NR devices through the unified NR penetration rate parameter. This single configurable structure serves multiple functions by adapting to different device compositions, eliminating the need for separate resource pool configurations for different RAT types and thereby reducing overall system complexity while maintaining ease of operation
Data Source
AI summary
A user equipment (UE) can transmit first radio access information indicating a first ratio of first sidelink devices configured to use a first radio access technology (RAT) to second sidelink devices configured to use a second RAT. The UE can receive second radio access information from one or more sidelink devices of at least one of the first sidelink devices or the second sidelink devices. Each second radio access information indicates a respective second ratio of the first sidelink devices configured to use the first RAT to the second sidelink devices configured to use the second RAT. The UE can select a resource pool frame structure based on the first ratio and each of the respective second ratios, and the resource pool frame structure is configured to partition a resource pool between the first RAT and the second RAT for sidelink communication in a sidelink network.