MBS Control Signaling for Lossless UE Mobility Synchronization
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Solution Overview
Problem
In the mobility scenario of user equipment (UE) in multicast broadcast service (MBS) technology, achieving lossless data transmission and synchronization of sending behaviors on the network side is challenging, particularly in maintaining continuous data reception without packet loss during mobility.
Innovation Solution
A processing method involving network nodes to determine and send MBS control information to process MBS data packets, ensuring synchronization by generating and sharing MBS control information among network nodes, including anchor-CU-CPs and common-CU-UPs, to maintain consistent data processing across different network elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If MBS control information is distributed across multiple network nodes independently, then each node can process data packets autonomously, but synchronization of sending behaviors cannot be achieved during UE mobility
Solution Approach 1:
An anchor-CU-CP is introduced as a mediator network node that centrally manages and distributes MBS control information to other CU-CPs. This intermediary role ensures that all network nodes receive consistent control information with identical PDCP layer data packet numbers, enabling synchronized sending behaviors during UE mobility while maintaining autonomous processing capabilities at each node.
2Reliability
If a centralized anchor-CU-CP is used to distribute MBS control information, then synchronization of sending behaviors is achieved, but network overhead increases due to information dissemination
Solution Approach 1:
The anchor-CU-CP performs preliminary action by generating and distributing MBS control information to all CU-CPs before UE mobility occurs. This advance distribution ensures that when UE mobility happens, all nodes already have the synchronized control information with matching PDCP layer data packet numbers, eliminating the need for real-time coordination during mobility and reducing overall network overhead.
3Reliability
If MBS control information is frequently updated to maintain synchronization, then data transmission reliability is improved, but processing complexity and time consumption increase
Solution Approach 1:
The patent extracts the complex task of MBS control information generation and synchronization management from all network nodes and concentrates it solely in the anchor-CU-CP. Other CU-CPs simply receive and execute the distributed control information without needing to generate or manage it independently. This extraction of complexity reduces processing overhead and time consumption while maintaining high synchronization accuracy through the anchor-CU-CP's centralized management.
Data Source
AI summary
Provided are a processing method, a network node and a storage medium. The processing method is applied to a first network node and includes determining multicast broadcast service (MBS) control information and sending the MBS control information, where the MBS control information instructs a second network node to process an MBS data packet.