V2X Message Transmission Using Flow ID for Overlapping MBMS Areas
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current eMBMS technologies restrict V2X message transmission by requiring non-overlapping service areas, which limits the ability to broadcast V2X messages effectively across overlapping areas, such as multiple vehicle collisions on the same road.
Innovation Solution
A method and apparatus for transmitting V2X messages using a unique flow ID to allocate and transmit Multimedia Broadcast Multicast Service (MBMS) messages, allowing for overlapping service areas by determining the MBMS service area based on position information and forwarding data packets to corresponding base stations or cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If non-overlapping service areas are used for eMBMS transmission, then service area management is simplified, but the ability to broadcast V2X messages across overlapping areas is limited
Solution Approach 1:
The patent segments the service area management by introducing flow ID as a separate dimension. Instead of managing overlapping areas as a single complex service area, the system divides V2X messages into different flows, each with its own flow ID. This allows multiple flows to be transmitted over the same eMBMS bearer in overlapping service areas, effectively segmenting the broadcasting capability while maintaining simplified service area boundaries.
Solution Approach 2:
The patent adds a new dimension (flow ID) to the service area management system. By introducing flow ID as an additional identifier dimension, the system can distinguish and manage multiple V2X message flows independently. This dimensional addition enables overlapping service area broadcasting without increasing the complexity of service area boundaries, as the flow ID provides the necessary differentiation.
2Productivity
If multiple V2X flows share the same eMBMS bearer, then transmission efficiency is improved, but message differentiation and routing become more complex
Solution Approach 1:
The patent introduces flow ID as an intermediary element between the V2X messages and the eMBMS bearer. This flow ID acts as a mediator that carries differentiation information without requiring complex routing logic. The flow ID is included in the message structure, allowing receiving entities to differentiate and route messages based on this simple identifier rather than complex message characteristics.
Solution Approach 2:
The patent changes the parameter used for message differentiation from complex message content analysis to a simple flow ID parameter. By transforming the differentiation mechanism into a parameter-based approach (flow ID assignment), the system achieves efficient message differentiation and routing. The flow ID parameter provides a straightforward method to distinguish multiple V2X flows sharing the same bearer.
Data Source
AI summary
A communication method and system are provided for converging a 5G communication system with technology for IoT. The 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. A method performed by a V2X includes receiving, from a terminal, a V2X message including location information on the terminal; determining a first MBMS broadcast area for a V2X service based on the location information on the terminal; transmitting, to a BMSC, a first request message for the V2X service including information on the first MBMS broadcast area and a first TMGI for the V2X service, wherein the information on the first MBMS broadcast area includes at least one MBMS SAI mapped to the location information on the terminal; and transmitting, to the BMSC, a second request message for the V2X service, the second request message including information on a second MBMS broadcast area for broadcasting second MBMS data for the V2X service and the first TMGI. The first MBMS data is broadcast within the first MBMS broadcast area, and the first TMGI is used for the second MBMS data, in case that the first MBMS broadcast area does not overlap the second MBMS broadcast area.