Network-Assisted V2X Side-Link Resource Configuration
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently configuring and managing side-links for unicast and multi-cast communications in V2X networks, particularly in terms of resource allocation and reliability, especially when UEs are in idle or inactive states, leading to increased signaling overhead and potential transmission failures.
Innovation Solution
The implementation of network-assisted side-link resource configuration methods, where a UE establishes an RRC connection with a base station to transmit V2X connection information, receives a side-link configuration including resource allocation in time and frequency, and communicates with a target UE using this configuration, with the base station assisting in UE pairing and data transmission via the Uu interface to ensure reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UEs perform autonomous side-link resource configuration without network assistance, then device complexity and signaling overhead are reduced, but transmission reliability and configuration accuracy deteriorate
Solution Approach 1:
The base station acts as an intermediary that provides assistance information for side-link resource configuration. The network assists UEs in selecting appropriate resources by providing configuration parameters, resource pools, and scheduling information, thereby improving transmission reliability without requiring fully autonomous UE operation
Solution Approach 2:
The network performs preliminary configuration by pre-defining resource pools, parameter sets, and transmission formats before UE side-link communication begins. This preliminary action reduces the complexity of real-time configuration decisions while ensuring reliable resource allocation through network-planned resource distribution
2Reliability
If network assists in side-link resource configuration, then transmission reliability improves, but signaling overhead increases
Solution Approach 1:
The network provides partial assistance by supplying only the most critical configuration parameters and resource pool definitions, while allowing UEs to autonomously select specific resources within those pools. This partial action reduces signaling overhead compared to full network control while maintaining sufficient reliability through network-guided resource allocation
Solution Approach 2:
The system uses parameter-based configuration where the network provides parameter sets (e.g., resource pool parameters, transmission parameters) that UEs can adjust based on local conditions. This parameter change approach allows flexible adaptation without requiring extensive signaling for every configuration detail
3Use of energy by moving object
If UEs in idle or inactive states perform side-link communication, then network resource usage is reduced, but connection establishment reliability deteriorates
Solution Approach 1:
UEs in idle or inactive states perform self-service by autonomously selecting resources from pre-configured pools and establishing side-links without network involvement. This self-service mechanism reduces network resource usage while maintaining communication capability through autonomous UE operation within network-defined parameters
4Loss of information
If autonomous resource selection is used for side-link communication, then signaling overhead is reduced, but resource allocation efficiency deteriorates
Solution Approach 1:
The network performs preliminary resource pool configuration and resource allocation planning before UE communication begins. By pre-organizing resources into pools with specific parameters and characteristics, the network enables efficient autonomous UE selection while maintaining overall resource allocation efficiency through network-planned resource distribution
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.