Multicast Session Continuity in RRC Inactive State
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems do not efficiently enable user equipment (UE) in a radio resource control (RRC) inactive state to continue receiving multicast/broadcast services (MBS) without disrupting the service.
Innovation Solution
The proposed communication method allows UE in an RRC inactive state to receive multicast sessions by using an MBS configuration and includes steps for transitioning to and maintaining the RRC inactive state while ensuring continuous multicast reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If user equipment transitions to RRC inactive state to save resources, then energy consumption and network load are reduced, but multicast service continuity is disrupted
Solution Approach 1:
The network applies MBS configuration in advance before the UE transitions to RRC inactive state, ensuring that the multicast session can be resumed without interruption. The configuration is pre-established and maintained during the inactive state, allowing seamless service continuity when the UE becomes active again.
Solution Approach 2:
The patent introduces an intermediary mechanism where the network maintains MBS configuration as a mediator between the UE's RRC inactive state and the multicast service. This configuration acts as a bridge that preserves service context without requiring the UE to remain in connected state, thus resolving the contradiction between energy saving and service continuity.
2Reliability
If user equipment remains in RRC connected state to maintain multicast reception, then service continuity is ensured, but network resources and UE power consumption increase
Solution Approach 1:
The network performs preliminary configuration of MBS parameters before transitioning the UE to inactive state. This preliminary action ensures that all necessary information for continuous multicast reception is prepared and stored, eliminating the need for the UE to remain in connected state while maintaining service continuity.
Solution Approach 2:
The patent changes the state parameter of the UE from RRC connected to RRC inactive while maintaining the MBS configuration parameters. This parameter change allows the UE to reduce power consumption by entering inactive state while the network maintains the necessary configuration parameters to ensure service continuity when the UE becomes active again.
3Device complexity
If MBS configuration is discarded during cell reselection or state transition, then resource management is simplified, but service interruption occurs
Solution Approach 1:
The network performs preliminary actions to maintain MBS configuration even when the UE undergoes cell reselection or state transition. The configuration is pre-established and preserved during these events, allowing the service to continue without interruption while maintaining manageable resource allocation.
Solution Approach 2:
The patent ensures the continuity of useful action by maintaining the MBS configuration throughout cell reselection and state transition events. The configuration is preserved and activated again after these events, ensuring that the multicast service continues without interruption while the network manages resources efficiently.
Data Source
AI summary
A communication method used in a mobile communication system that provides a multicast/broadcast service (MBS), the communication method including the steps of: receiving, by a user equipment in a radio resource control (RRC) connected state, a multicast session from a network; and transmitting, by the user equipment, a message to the network, the message including first information indicating that the user equipment desires to transition to an RRC inactive state and second information regarding continuation of reception of the multicast session.