V2X Server Flow ID Allocation for Overlapping eMBMS Broadcast Areas
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Solution Overview
Problem
Current eMBMS technologies cannot efficiently broadcast V2X messages to overlapping service areas for events like vehicle collisions, as they are restricted by non-overlapping service areas, limiting the ability to inform corresponding adjacent areas effectively.
Innovation Solution
A V2X server allocates a unique flow ID for V2X services, allowing for the broadcasting of multiple V2X flows on the same eMBMS bearer, enabling overlapping broadcast areas that are not restricted by conventional non-overlapping service area limitations, and determines the correct MBMS broadcast area based on position information to transmit V2X messages efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional eMBMS technology is used for V2X message broadcasting, then service area management is simplified, but the ability to broadcast to overlapping service areas is lost
Solution Approach 1:
The patent segments the service area management by introducing flow ID as a separate dimension. Each V2X flow can have its own service area configuration, allowing overlapping areas without requiring complex overall service area management. The segmentation enables independent control of broadcast areas for different V2X message types.
Solution Approach 2:
The patent adds a new dimension (flow ID) to the service area management system. Instead of managing service areas as a single hierarchical structure, the system now manages multiple service areas across different flow dimensions, enabling overlapping coverage while maintaining simplified management through flow-based organization.
2Area of stationary object
If multiple V2X flows are broadcast on the same eMBMS bearer, then broadcast coverage is improved, but message identification becomes more difficult
Solution Approach 1:
The patent applies local quality by associating specific flow IDs with specific V2X message types and service areas. Each flow maintains its own identification characteristics, allowing receivers to easily identify and process relevant messages while multiple flows share the same broadcast infrastructure.
Solution Approach 2:
The flow ID acts as an intermediary between the eMBMS bearer and the actual V2X messages. It provides a clear identification layer that mediates between the shared broadcast channel and the diverse message types, making message identification straightforward through flow-based filtering.
Data Source
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AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present disclosure discloses a method for transmitting a vehicle to everything (V2X) message, including: receiving a V2X message reported by a vehicle; allocating a unique flow ID for the V2X message; transmitting a Multimedia Broadcast Multicast Service (MBMS) message to a core network (CN), in which the MBMS message carries the flow ID and MBMS service area; after adding the flow ID to a packet header of a MBMS data packet corresponding to the V2X message, transmitting the MBMS data packet in a downlink direction to a gateway or a base station via the CN, such that the gateway or base station forwards the MBMS data packet based on a corresponding relationship, which is between flow ID and MBMS service area. The present disclosure also provides an apparatus for transmitting a V2X message. By adopting technical solutions in the present disclosure, broadcasting of a downlink V2X message may not be restricted by non-overlapping of service areas in the prior art.