NR V2X Groupcast Service Transmission via Unicast Mapping
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently performing groupcast communication in V2X scenarios, particularly in establishing and managing group-specific connections, which increases complexity and overhead.
Innovation Solution
A method for determining mapping information that represents the relationship between unicast and groupcast services, allowing for the transmission of groupcast services based on existing unicast connections, thereby omitting the need for establishing a separate group-specific connection, reducing complexity and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate group-specific connection is established for groupcast communication, then communication reliability is improved, but device complexity and connection management overhead increase
Solution Approach 1:
The patent applies universality by enabling unicast connections to serve multiple functions - both individual unicast communication and groupcast communication. The same unicast connection infrastructure is reused for groupcast purposes through mapping relationships, eliminating the need for separate group-specific connection establishment and reducing overall system complexity while maintaining communication reliability
2Reliability
If separate groupcast connection establishment procedures are implemented, then groupcast communication reliability is improved, but signaling overhead and procedure complexity increase
Solution Approach 1:
The patent merges the unicast connection establishment procedure with groupcast communication requirements. By establishing mapping relationships between unicast connections and groupcast services, the system combines multiple functions into a single procedure, reducing signaling overhead while ensuring reliable groupcast communication through the inherited unicast connection management
Data Source
AI summary
An embodiment of the present disclosure provides a method for a first apparatus for transmitting a groupcast service. The method comprises the steps of: determining, based on a plurality of unicast services received from a plurality of apparatuses, mapping information indicating the mapping relationship between the plurality of unicast services and a groupcast service; and transmitting, based on the mapping information, the groupcast service to a second apparatus and a third apparatus included in the plurality of apparatuses.