Coordinator UE Group Registration for 2-Hop Cooperative Transmission
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Solution Overview
Problem
Existing proximity-based services (ProSe) in LTE D2D communication cannot support 2-hop cooperative group transmission as they fail to register a group of UEs to the network, lacking active context and associated bearers, and are designed for point-to-point rather than point-to-multipoint communication.
Innovation Solution
A method and apparatus for a coordinator UE to initiate a registration process by transmitting a group ID to a RAN node, followed by an authentication and security procedure to register a group of UEs, enabling the setup of a context and temporary identities for group communication, allowing 2-hop cooperative transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing ProSe services are used for D2D communication, then point-to-point communication is supported, but point-to-multipoint group transmission and network registration are not supported
Solution Approach 1:
The patent extends the ProSe service framework to support multiple communication modes (point-to-point and point-to-multipoint) through a unified group-based architecture. By introducing group IDentities and modifying the ProSe function to handle group registrations, the system achieves multi-functionality while maintaining backward compatibility with existing point-to-point services
Solution Approach 2:
The patent introduces a ProSe function in the network that acts as an intermediary to manage group registrations and coordinate communications between UEs. This intermediary entity enables the network to oversee and support group transmissions, providing the missing network registration capability while preserving direct UE-to-UE communication paths
2Productivity
If traditional attach procedure is used for individual UE registration, then single UE context is established, but group context and temporary identities for group communication are not established
Solution Approach 1:
The patent merges multiple individual UE registrations into a single group registration operation. By allowing one UE to register a group of UEs using a group IDentity, the system reduces the number of separate attach procedures needed while establishing a unified group context that manages all member UEs collectively
Solution Approach 2:
The patent introduces preliminary group identity assignment and group context establishment before individual communication operations. The group context is set up in advance with temporary identities allocated, enabling efficient group communications without requiring individual registration steps for each UE in the group
Data Source
AI summary
The present disclosure relates to telecommunications. In one of its aspects, the disclosure concerns a method in a coordinator User Equipment (UE) for registering a group of UEs to a wireless communications system. The coordinator UE represents the group of UEs. The method comprises transmitting, to a Radio Access Network (RAN) node, a message comprising a group IDentity (ID) to initiate an authentication and security procedure to register the group of UEs to the wireless communications system. The group ID identifies the group of UEs.