Multicast Capability Negotiation in RRC Inactive State
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Solution Overview
Problem
In 5G multicast and broadcast services, a large number of users simultaneously connecting to receive a multicast service can exceed normal admission control limits, preventing them from receiving the service.
Innovation Solution
A method for capability negotiation between User Equipment (UE) and a communication network to deliver multicast services in the RRC_INACTIVE state, involving the UE sending a capability-indication message to register its intention to join a multicast session, allowing the network to determine parameters and send the multicast service accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large number of users simultaneously connect to receive multicast service, then service coverage is improved, but admission control limits are exceeded and service delivery fails
Solution Approach 1:
The system performs preliminary capability indication and negotiation between UE and network before multicast service delivery. The UE indicates its capability to receive multicast service in RRC_INACTIVE state, and the network determines parameters in advance, enabling proactive preparation for large-scale user admission without exceeding control limits
Solution Approach 2:
The patent introduces dynamic capability negotiation mechanisms where the UE's capability indication and network parameter determination adapt to current network conditions and user demands. This dynamic adjustment allows the system to flexibly manage admission control for large numbers of users while maintaining service reliability
2Use of energy by moving object
If multicast service is delivered to UEs in RRC_INACTIVE state, then resource efficiency is improved, but capability compatibility must be negotiated
Solution Approach 1:
The patent extracts the capability indication step as a separate, explicit signaling mechanism. The UE sends a capability indication message to the network, and the network responds with parameter determination, isolating the complexity of capability negotiation from the main service delivery flow and enabling efficient resource management in RRC_INACTIVE state
Data Source
AI summary
The present disclosure relates to a system and method of providing UE capability of supporting reception of multicast in Radio Resource Control_INACTIVE (RRC_INACTIVE) state. The method comprises sending an uplink-message to a communication network to register the UE's intention of joining a multicast session to receive a multicast service. Further a capability-indication is included in the uplink-message, where the capability indication indicates if the UE is capable of joining the multicast session in Radio Resource Control_INACTIVE (RRC_INACTIVE) state. Furthermore, the multicast service is received in the RRC_INACTIVE state based on capability negotiation between the UE and the communication network, in response to the capability indication.