Session Management Bandwidth Control for 5G Hybrid Access
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Solution Overview
Problem
In 5G network architecture, managing service flow transmission is challenging due to unclear control of total maximum bit rate (TMBR) and aggregate maximum bit rate (AMBR) for both guaranteed bit rate (GBR) and non-GBR service flows, particularly in hybrid access scenarios where multiple access technologies are used.
Innovation Solution
A method and apparatus where the session management network element obtains the TMBR and GBR service flow bandwidth to determine the AMBR and TMBR, sending this information to the data plane network element to control service flow transmission, ensuring Quality of Service (QoS) parameters are met by managing bandwidth allocation across different access technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TMBR is defined for a session to control total bandwidth, then bandwidth management capability is improved, but session management network element and user plane network element become unclear about how to control service flow transmission
Solution Approach 1:
The patent segments the TMBR control into two distinct parts: AMBR for non-GBR service flows and TMBR for GBR service flows. This segmentation allows each network element to control specific flow types clearly, resolving the confusion while maintaining overall bandwidth management capability.
Solution Approach 2:
The patent introduces AMBR as an intermediary parameter that bridges the gap between TMBR and non-GBR service flow control. By using AMBR as a mediator, the system achieves clear control mechanisms for different service flow types without losing overall bandwidth management effectiveness.
2Adaptability or versatility
If hybrid access capability is supported to provide multiple access technologies, then network versatility is improved, but QoS parameter control becomes complex and unclear
Solution Approach 1:
The patent applies local quality by defining access-specific QoS parameters (first AMBR for first access technology, second AMBR for second access technology) tailored to each access type's characteristics. This allows each access technology to have optimized control without increasing overall system complexity.
Solution Approach 2:
The patent changes the QoS parameter structure by introducing access-specific AMBR parameters that vary by access technology. This parameter differentiation simplifies control for each access type while maintaining versatility across multiple access technologies.
3Productivity
If aggregate bandwidth control is implemented for non-GBR service flows, then bandwidth allocation efficiency is improved, but control precision for individual access technologies deteriorates
Solution Approach 1:
The patent segments aggregate bandwidth control into access-specific AMBR parameters, allowing separate control for each access technology. This segmentation maintains allocation efficiency while improving control precision for individual access types.
Solution Approach 2:
The patent adds an access technology dimension to bandwidth control by introducing separate AMBR parameters for different access types. This dimensional expansion enables simultaneous aggregate control and access-specific precision without trade-offs.
Data Source
AI summary
Embodiments of this application relate to a method for controlling service flow transmission. One example method includes: a session management network element obtains a first TMBR of a service flow transmitted in a session by using a first access technology and a guaranteed bandwidth of a first GBR service flow, where the TMBR indicates a TMBR of service flows transmitted in the session by using the first access technology. The session management network element sends first information to a data plane network element, where the first information is used by the data plane network element to determine one or more of the following information of the session: a first AMBR, a second AMBR corresponding to the first access technology, and a second TMBR. A second AMBR indicates an AMBR of a non-GBR service flow transmitted in the session by using the first access technology.