5G MBS User-Plane Access to Reduce Signaling Load
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Solution Overview
Problem
The 5G multicast and broadcast service (MBS) system faces challenges in supporting a service region effectively, leading to increased signaling load due to access being implemented through the control plane.
Innovation Solution
A method and apparatus that support the MBS service region by allowing user terminals to access the service via the user plane, using MBS rules generated by policy control functional entities based on service request messages, enabling terminals to determine their location within the service region and access the service accordingly, thereby reducing signaling load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MBS service access is implemented through control plane, then service region support can be achieved, but signaling load increases
Solution Approach 1:
The patent introduces a user plane as an intermediary path for MBS service access, bypassing the control plane for actual service data transmission. The control plane only establishes initial access and provides authorization, while the user plane handles subsequent service traffic, thereby reducing control plane signaling load while maintaining service region support capabilities
Solution Approach 2:
The patent segments the MBS service access process into two distinct phases: control plane phase for initial access and authorization (handling signaling), and user plane phase for actual service data transmission (handling service traffic). This segmentation allows each plane to focus on its optimized function, reducing overall signaling load while preserving service region support
2Quantity of substance
If user terminals access MBS service actively through user plane, then signaling load is reduced, but service region control complexity increases
Solution Approach 1:
The patent implements preliminary action by having the control plane pre-authenticate and pre-authorize user terminals before they access MBS services through the user plane. The control plane establishes access permissions and service region validation in advance, allowing terminals to autonomously access services without continuous control plane intervention, thereby reducing signaling load while maintaining control through initial authorization
3Adaptability or versatility
If MBS service allows broad access, then service availability improves, but unauthorized access risk increases
Solution Approach 1:
The patent uses the control plane as an intermediary authentication layer that validates user terminals and service region permissions before allowing access to the user plane. This intermediary mechanism enables broad service availability through the user plane while maintaining security through control plane authorization, effectively preventing unauthorized access
Data Source
AI summary
A communication method includes: receiving a multicast and broadcast service (MBS) rule issued by a policy control functional entity, the MBS rule being generated by the policy control functional entity based on a service request message transmitted by an application functional entity, and the service request message including information of an MBS service region; determining whether the user terminal is located in the MBS service region according to the MBS rule and position information of the user terminal; and accessing an MBS service in the MBS service region in response to a determination that the user terminal is located in the MBS service region.