Base Station MBMS Information Exchange for V2X Continuity
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Solution Overview
Problem
In a wireless communication system, a UE may not receive V2X messages when moving between different MBMS networks due to differing network information, leading to delays in receiving MBMS network broadcasts.
Innovation Solution
A method where a first base station transmits and receives information about its MBMS network to and from a second base station using X2 setup and eNB configuration update messages, ensuring seamless V2X communication by exchanging User Service Descriptions (USD) and other relevant network details.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations operate with independent MBMS network information, then each network maintains its own service description and configuration, but UEs experience service interruption and delays when moving between different MBMS networks
Solution Approach 1:
The invention applies preliminary action by having base stations proactively exchange and store MBMS network information (USD, frequency, SIB15) with neighboring base stations before UEs need to move between networks. This pre-synchronization ensures that when a UE moves to a new MBMS network, the target base station already has the necessary network information ready, eliminating service interruption and ensuring continuous V2X message reception.
2Ease of operation
If MBMS network information is shared between base stations, then UE mobility between networks is seamless, but base stations require additional signaling overhead and information synchronization
Solution Approach 1:
The invention uses the existing X2 interface between base stations as an intermediary mechanism for information exchange. By utilizing the established X2 setup and eNB configuration update procedures, the patent enables MBMS network information sharing without requiring new dedicated signaling protocols. This approach simplifies implementation while achieving seamless UE mobility between MBMS networks.
3Reliability
If base stations exchange detailed MBMS network information, then service continuity is maintained during UE handover, but signaling overhead and processing time increase
Solution Approach 1:
The invention extracts only the essential MBMS network information parameters needed for service continuity (User Service Description, frequency information, SIB15 content) and exchanges them between base stations. By focusing on these critical parameters rather than complete network configurations, the patent minimizes signaling overhead and processing time while ensuring sufficient information is available to maintain V2X service continuity during UE handover.
Data Source
AI summary
Provided are a method for performing, by a first base station belonging to a first MBMS network, vehicle to everything communication (V2X communication) in a wireless communication system, and an apparatus for supporting the same. The method may comprise the steps of: transmitting information about the first MBMS network to a second base station belonging to a second MBMS network; and receiving, from the second base station, information about the second MBMS network.