Network-Assisted Side-Link Configuration for V2X Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring and managing side-links in V2X networks, particularly in scenarios involving failure of PC5 data links, which can lead to disruptions in data transmission.
Innovation Solution
The proposed solution involves network-assisted side-link resource configuration methods, where user equipment (UE) devices establish RRC connections with base stations, transmit V2X connection information, and receive side-link configurations that include resource allocations in time and frequency for data transmission with target UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network-assisted side-link configuration is implemented, then reliability of data transmission is improved, but signaling overhead increases
Solution Approach 1:
The network pre-configures side-link resources and parameters before actual V2X communication occurs. The base station provides side-link configuration information including resource allocations, power control parameters, and other transmission parameters in advance, so that when side-link communication is needed, UEs can immediately use the pre-configured parameters without extensive real-time signaling.
Solution Approach 2:
The network copies and reuses configuration parameters across multiple UEs and communication scenarios. Once a set of side-link configuration parameters is established, it can be replicated and applied to multiple V2X communication pairs, reducing the need for individual configuration signaling for each UE pair.
2Reliability
If network-assisted recovery mechanisms are added, then uninterrupted data transmission is achieved, but device complexity increases
Solution Approach 1:
The system implements feedback mechanisms where UEs monitor the quality of side-link connections and report status to the network. When link failures or degradation are detected, the network receives feedback and automatically triggers recovery procedures by reconfiguring side-link parameters or reallocating resources, enabling automatic recovery without complex manual intervention.
Solution Approach 2:
UEs are equipped with autonomous capabilities to detect link failures and initiate recovery requests without network intervention. The UE can autonomously identify when a side-link connection fails and automatically request reconfiguration or resource reallocation from the network, reducing the complexity of network-side recovery management.
3Productivity
If resource allocation in time and frequency is specified, then data transmission efficiency is improved, but flexibility in resource usage decreases
Solution Approach 1:
The side-link resource configuration is designed to be dynamic rather than static. The network can adjust time-frequency resource allocations based on changing V2X traffic conditions, channel quality, and network load. Configuration parameters such as resource blocks, subframes, and power levels can be modified in real-time to adapt to varying transmission requirements while maintaining efficient resource utilization.
Data Source
AI summary
Apparatuses, systems, and methods for a user equipment device (UE) to perform methods for network assisted side-link resource configuration for unicast and/or multi-cast/groupcast communications in V2X networks. A UE may, after establishing an RRC connection with a base station, transmit, to the base station, V2X connection information. The V2X connection information may include a V2X identifier associated with the UE and a V2X identifier associated with a target UE. The UE may receive, from the base station, a side-link configuration for data transmission with the target UE. The side-link configuration may include a resource allocation defined in time and frequency (e.g., a transmit/receive pool). The UE may communicate with the target UE using the resource allocation included in the side-link configuration.