MBS Bearer Type Switching During RAN Handover
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing bearer type changes during mobility procedures, particularly in scenarios involving multicast-broadcast services, leading to suboptimal utilization of radio resources and potential service disruptions.
Innovation Solution
A method and apparatus for bearer type change in wireless communication systems, where a source RAN node transmits a handover request message to a target RAN node, receives a response message informing a bearer change, and configures the wireless device for communication on a new bearer, allowing the target RAN node to determine the optimal bearer type based on resource availability and service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed bearer type is used during mobility procedure, then configuration simplicity is maintained, but radio resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic bearer type selection during handover by allowing the target RAN node to autonomously determine whether to use MBS bearer or unicast bearer based on real-time resource availability and service requirements, transforming the static bearer configuration into a dynamic adaptive mechanism that optimizes radio resource utilization without increasing configuration complexity
2Productivity
If bearer type change is allowed during mobility, then radio resource utilization efficiency is improved, but service continuity reliability may deteriorate
Solution Approach 1:
The patent ensures service continuity by having the source RAN node provide complete first bearer information to the target RAN node before handover execution, enabling the target node to pre-determine the optimal second bearer type and prepare configuration information in advance, thus maintaining uninterrupted MBS service during the mobility procedure
3Adaptability or versatility
If target RAN node autonomously selects bearer type, then adaptability to different scenarios is improved, but signaling complexity increases
Solution Approach 1:
The patent extracts the bearer type selection decision from the complex handover signaling exchange by allowing the target RAN node to autonomously determine the optimal bearer type based on received first bearer information and local resource conditions, eliminating the need for additional negotiation messages between source and target nodes while maintaining high adaptability
Data Source
AI summary
The present disclosure relates to bearer type change in wireless communications. According to various embodiments of the present disclosure, a method performed by a source radio access network (RAN) node in a mobility procedure to a target RAN node in a wireless communication system comprises: providing a multicast-broadcast service (MBS) service via a first bearer; transmitting, to the target RAN node, a handover request message comprising information for the first bearer; receiving, from the target RAN node, a handover response message comprising i) information informing a change of the first bearer to a second bearer, and ii) configuration information for a communication on the second bearer; and transmitting, to a wireless device, the configuration information for the communication on the second bearer.