Multicast/Broadcast Session Handover With Temporary Group Identities
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in establishing and managing multicast/broadcast service sessions, particularly during user equipment mobility, as they are unclear on how to handle session continuity and resource allocation efficiently.
Innovation Solution
A method involving wireless network nodes, session management functions, and network functions that utilize temporary mobile group identities to manage multicast/broadcast service sessions, including handover requests, forwarding tunnels, and radio resource allocation to ensure seamless session continuity and efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If Point-to-Point delivery method is used for MBS, then individual UE data transmission is enabled, but system resource consumption increases
Solution Approach 1:
The patent implements dynamic switching between PTP and PTM delivery methods based on UE mobility state and service requirements. The network can flexibly adjust the delivery method from static to dynamic, selecting PTP for mobile UEs requiring individual attention and PTM for stationary UEs to conserve resources.
Solution Approach 2:
The patent changes the delivery method parameter (PTP/PTM) based on UE mobility parameters and service conditions. By monitoring UE mobility state and adjusting the delivery method parameter accordingly, the system optimizes resource consumption while maintaining service quality.
2Speed
If session management is simplified, then establishment speed increases, but session continuity during mobility deteriorates
Solution Approach 1:
The patent performs preliminary actions by pre-establishing PTP delivery capability and configuring necessary parameters before UE mobility occurs. This allows the network to quickly switch to PTP mode when needed, maintaining both fast session establishment and continuous service during mobility.
Solution Approach 2:
The patent introduces an intermediary mechanism (SMF and access network interaction) that mediates between simplified session management and mobility continuity requirements. The SMF acts as an intermediary that can quickly establish sessions while coordinating with the access network to ensure continuity during handovers.
3Adaptability or versatility
If MBS session handling during UE mobility is not standardized, then implementation flexibility increases, but system reliability decreases
Solution Approach 1:
The patent segments the MBS session handling into distinct phases (session establishment, mobility detection, handover execution, session maintenance) with standardized procedures for each phase. This segmentation provides both flexibility in implementation and reliability through standardized transition protocols.
Solution Approach 2:
The patent creates a universal MBS session handling framework that can handle multiple scenarios (PTP switching, PTM switching, handover, session maintenance) through a unified standardized approach. This multi-functional framework ensures reliable session continuity across different mobility scenarios while maintaining implementation flexibility.
Data Source
AI summary
A wireless communication method for use in a first wireless network node is disclosed. The wireless communication method comprises receiving, from a first session management function, a temporary mobile group identity associated with a multicast/broadcast service and a wireless terminal, receiving, from a second session management function, a request for activating a multicast/broadcast service session corresponding to the temporary mobile group identity, and transmitting, to the first session management function, a message comprising information indicating a status of the multicast/broadcast service session in the first wireless network node.