Relay UE ProSe Group ID Broadcast Service Relay
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Solution Overview
Problem
Current wireless communication systems face challenges in providing a flexible and rapid group communication service, particularly for remote UEs that are not within the coverage of traditional eNBs, as they struggle to establish effective relay nodes for broadcast services.
Innovation Solution
The method involves a remote UE discovering and establishing a ProSe UE-to-network relay using a pre-established MBMS bearer, where the relay node broadcasts eMBMS traffic via a one-to-many link identified by a ProSe layer-2 group ID, allowing the remote UE to receive broadcast content without needing to perform a TMGI monitoring request, thus improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a remote UE establishes a relay node for broadcast service, then the UE can receive eMBMS traffic, but the process requires TMGI monitoring request which increases complexity and time
Solution Approach 1:
The system performs preliminary actions by pre-configuring the remote UE with TMGI information and establishing the MBMS bearer before the UE needs to receive broadcast content. This allows the UE to skip the TMGI monitoring request step and directly receive eMBMS traffic through the pre-established relay connection.
Solution Approach 2:
The invention extracts and removes the TMGI monitoring request step from the relay establishment procedure. By separating this step out, the system allows UEs that already have pre-configured TMGI information to establish relays without performing the monitoring request, thereby reducing complexity and establishment time.
2Adaptability or versatility
If traditional eNB coverage is used for broadcast service, then network control is maintained, but remote UEs outside coverage cannot access broadcast services
Solution Approach 1:
The invention introduces a relay UE as an intermediary between the network and remote UEs outside eNB coverage. The relay UE maintains a reliable connection to the network and forwards eMBMS traffic to remote UEs, thereby extending service coverage while maintaining connection reliability through the intermediary device.
Solution Approach 2:
The system transitions from a two-dimensional coverage model (direct eNB to UE) to a three-dimensional model by adding the relay UE dimension. This allows broadcast services to reach UEs in previously unreachable areas by routing through the intermediate relay node, effectively expanding coverage without compromising network reliability.
3Reliability
If TMGI monitoring request is performed for each broadcast service, then service accuracy is ensured, but resource waste increases due to repeated monitoring
Solution Approach 1:
The system performs TMGI configuration in advance during the relay establishment phase. Once configured, the remote UE can receive broadcast services using this pre-configured information without needing to perform repeated TMGI monitoring requests, thereby ensuring service accuracy while reducing ongoing resource consumption.
Solution Approach 2:
The pre-configured TMGI information and established MBMS bearer enable continuous reception of broadcast services without interruption or repeated monitoring. This maintains reliable service reception while eliminating the periodic resource expenditure associated with repeated TMGI monitoring requests.
Data Source
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AI summary
One embodiment of the present invention relates to a method for providing, by a relay UE, a broadcast service in a wireless communication system, the method comprising the steps of: detecting a TMGI; and broadcasting TMGI announcement comprising the detected TMGI and a ProSe layer-2 group ID corresponding to the TMGI.