Relay Terminal MBMS Reception Signaling for ProSe
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Solution Overview
Problem
Existing UE-to-Network relay systems in ProSe services face inefficiencies in relaying MBMS traffic due to unnecessary signaling when a relay UE cannot receive the MBMS service, leading to suboptimal resource allocation and increased communication overhead.
Innovation Solution
A radio terminal equipped with a controller that transmits MBMS reception information to a remote terminal, indicating service availability and capable frequency bands, allowing for efficient resource allocation and reduced signaling by selecting suitable relay UEs and optimizing radio resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a relay UE transmits MBMS reception information indicating service unavailability, then signaling overhead is reduced by preventing unnecessary relay attempts, but communication overhead increases due to the additional information transmission
Solution Approach 1:
The relay UE transmits MBMS reception information in advance before actual MBMS traffic relay is attempted. This preliminary indication of service availability or unavailability prevents remote UEs from initiating relay procedures that would fail, thereby reducing signaling overhead associated with unsuccessful relay attempts while the initial information transmission establishes the basis for efficient resource allocation
Solution Approach 2:
The MBMS reception information acts as an intermediary signal between the relay UE and remote UEs. This intermediate information layer provides critical service availability status without requiring direct trial-and-error relay attempts, mediating the communication between relay capability assessment and actual MBMS traffic relay operations
2Productivity
If the relay UE indicates MBMS service unavailability, then resource allocation efficiency is improved by avoiding wasted relay resources, but device complexity increases due to the need to monitor and report service availability status
Solution Approach 1:
The relay UE autonomously monitors its own MBMS service reception status and independently determines whether to indicate service availability or unavailability. This self-service approach enables the relay UE to self-manage its relay functionality based on its current reception capability, improving resource allocation efficiency without requiring complex external coordination or control mechanisms
Solution Approach 2:
The relay UE implements a feedback mechanism where it continuously monitors its MBMS service reception status and reports this status information to remote UEs. This feedback loop enables dynamic adaptation of relay functionality based on current service availability, improving resource allocation efficiency while the feedback mechanism itself manages the complexity through standardized reporting procedures
Data Source
AI summary
A radio terminal according to one embodiment is a relay terminal configured to perform a UE-to-Network relay in a proximity service. The radio terminal comprises a controller configured to transmit, to a remote terminal configured to communicate with the relay terminal by the UE-to-Network relay, Multimedia Broadcast Multicast Service (MBMS) reception information related to whether or not the radio terminal can receive an MBMS service.