MCE V2X Session Control via MBSFN Area Determination
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Solution Overview
Problem
The existing MBMS system faces challenges in transmitting V2X messages to specific areas, as it is difficult to limit the message transfer to only a particular neighbor base station, leading to inefficient use of radio resources and unnecessary resource wastage in public safety networks.
Innovation Solution
A method and apparatus for controlling V2X message sessions using a multi-cell coordination entity (MCE) that receives a cell ID and MBMS service area identity, determines the multicast broadcast single frequency network (MBSFN) area, and transmits session control messages to the appropriate base stations, allowing for filtered distribution of V2X messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If V2X messages are transmitted using the existing MBMS system to a wide area, then the coverage and reach of the messages are improved, but the radio resources are wasted in areas where the messages are not needed
Solution Approach 1:
The patent applies local quality by enabling different transmission behaviors in different geographic areas. The MCE determines specific MBSFN areas based on cell ID and MBMS SAI, allowing V2X messages to be transmitted only in areas where they are needed rather than uniformly across the entire network. This creates area-specific transmission quality that matches the actual service requirements.
Solution Approach 2:
The patent segments the MBMS service area into specific MBSFN areas using the MBMS SAI parameter. By dividing the wide coverage area into smaller, controlled MBSFN areas, the system can selectively transmit V2X messages only to relevant regions. This segmentation allows precise control over message distribution and eliminates resource waste in unnecessary areas.
2Ease of operation
If the MBMS system transmits V2X messages to all base stations in the network, then the message distribution is simplified, but the efficiency of radio resource usage deteriorates
Solution Approach 1:
The MCE acts as an intermediary between the MBMS system and base stations. It receives the wide-area transmission request, determines the appropriate MBSFN areas based on cell ID and MBMS SAI, and then selectively forwards session control messages to only the necessary base stations. This intermediary function maintains system simplicity while achieving efficient, targeted message distribution.
3Stability of the object's composition
If the MBSFN area is configured statically by O&M, then the configuration is simple and stable, but the system cannot adapt to dynamic user distribution and traffic load
Solution Approach 1:
The patent introduces dynamics by enabling the MCE to determine MBSFN areas dynamically based on current cell ID and MBMS SAI information, rather than relying solely on static O&M configuration. The system can now adapt the service area to match actual user distribution and traffic conditions while maintaining the underlying static configuration framework for stability.
Data Source
AI summary
Provided are a method for controlling, by a multi-cell coordination entity (MCE), a session for transmitting a V2X message in a wireless communication system, and an apparatus for supporting the same. The method comprises the steps of: receiving, by the MCE, a cell ID and a multimedia broadcast multicast service (MBMS) service area identity (SAI) from a mobility management entity (MME); determining a multicast broadcast single frequency network (MBSFN) area to which the V2X message is to be transferred on the basis of the cell ID; transmitting a session control message to a base station which belongs to the determined MBSFN area, wherein the cell ID may be an ID of a cell to which the V2X message is transmitted.