RAN Node V2X Support Indication via X2 Setup Messages
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Solution Overview
Problem
In wireless communication systems, particularly in LTE networks, there is a challenge in efficiently determining whether to support Vehicle-to-Everything (V2X) function, leading to potential signaling waste as base stations may forward V2X information to all neighboring nodes without knowing which ones support V2X functionality.
Innovation Solution
The method involves pre-configuring V2X support by including an indication in X2 setup request and response messages between RAN nodes, allowing them to determine if they should process and forward V2X information, thereby avoiding unnecessary signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If base stations forward V2X information to all neighboring nodes without checking support capability, then V2X information dissemination is simplified, but signaling waste increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring V2X support capability information in X2 interface setup messages before actual V2X information forwarding occurs. This allows base stations to know in advance which neighbors support V2X, avoiding unnecessary signaling while maintaining simple forwarding operations.
Solution Approach 2:
The patent implements feedback by having base stations exchange capability information through X2 setup request and response messages. This feedback mechanism allows each base station to learn about its neighbors' V2X support status, enabling intelligent routing decisions that reduce signaling waste.
2Loss of energy
If base stations check V2X support capability before forwarding information, then signaling waste is reduced, but system complexity increases
Solution Approach 1:
The patent reduces complexity by performing the capability checking action in advance during X2 interface setup, rather than requiring complex real-time checks during V2X information forwarding. The capability information is cached and reused, simplifying the forwarding decision process.
3Productivity
If V2X support capability is indicated in X2 setup messages, then signaling efficiency is improved, but message structure complexity increases
Solution Approach 1:
The patent merges the V2X capability indication with existing X2 setup request and response messages that are already part of the base station initialization process. By combining the capability indication with routine setup signaling, no additional separate messages are needed, maintaining signaling efficiency while minimizing structural complexity.
Data Source
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AI summary
A method and apparatus for indicating vehicle-to-everything (V2X) or road side unit (RSU) function support in a wireless communication system is provided. A radio access network (RAN) node may transmit an indication of V2X/RSU function support of the RAN node to another RAN node. Alternatively, if the RAN nodes does not support V2X/RSU function, the RAN node may transmit a message including a cause value indicating that the RAN node does not support V2X/RSU function.