Multicast Service Continuity During RRC-Inactive Mobility
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Solution Overview
Problem
In 5G new radio (NR) networks, there is a challenge of ensuring continuous multicast service reception for user equipment (UE) in the RRC_INACTIVE state, particularly when the UE moves to a new cell that may not support multicast services or has changed multicast service transmission capabilities.
Innovation Solution
The solution involves a method where the UE determines its inability to receive a multicast service in the RRC_INACTIVE state and transmits an RRC resume request message to the network device. This message may include information about the UE's interest in the multicast service. The network device then configures the UE to receive the multicast service either in the RRC_CONNECTED state or, if possible, in the RRC_INACTIVE state, ensuring continuity of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the UE remains in RRC_INACTIVE state to save resources, then energy consumption is reduced and network resources are saved, but multicast service reception continuity is lost when the UE moves to a new cell that does not support multicast services
Solution Approach 1:
The UE performs preliminary detection of multicast service support capability in the target cell before actually needing to receive the service. By checking the system information block (SIB) in advance, the UE can determine whether to trigger RRC resume procedure beforehand, avoiding service interruption when mobility occurs.
Solution Approach 2:
The UE feeds back the detection result of multicast service support capability to the network side. Based on this feedback information, the network can make informed decisions about whether to maintain the UE in RRC_INACTIVE state or transition to RRC_CONNECTED state, optimizing both energy consumption and service continuity.
2Reliability
If the UE triggers RRC resume procedure to ensure multicast service reception, then service continuity is maintained, but network resources and signaling overhead increase
Solution Approach 1:
The UE performs preliminary detection of multicast service support capability in the target cell before actually needing to receive the service. By checking the system information block (SIB) in advance, the UE can determine whether to trigger RRC resume procedure beforehand, avoiding service interruption when mobility occurs.
Solution Approach 2:
The UE feeds back the detection result of multicast service support capability to the network side. Based on this feedback information, the network can make informed decisions about whether to maintain the UE in RRC_INACTIVE state or transition to RRC_CONNECTED state, optimizing both energy consumption and service continuity.
3Reliability
If the UE frequently checks multicast service support capability in different cells, then service continuity is improved, but signaling overhead and detection time increase
Solution Approach 1:
The UE performs preliminary detection of multicast service support capability in the target cell before actually needing to receive the service. By checking the system information block (SIB) in advance, the UE can determine whether to trigger RRC resume procedure beforehand, avoiding service interruption when mobility occurs.
Solution Approach 2:
The UE feeds back the detection result of multicast service support capability to the network side. Based on this feedback information, the network can make informed decisions about whether to maintain the UE in RRC_INACTIVE state or transition to RRC_CONNECTED state, optimizing both energy consumption and service continuity.
Data Source
AI summary
A method for service processing, an apparatus for service processing, a terminal, and a network device are provided, which relates to the field of communication technology. The method for service processing, performed by a terminal, includes: determining that the terminal is unable to receive a first multicast service in a radio resource control RRC_INACTIVE state, and transmitting an RRC resume request message to a network device; where the first multicast service is at least one of: that the terminal is interested in, or that the terminal has joined.