Multi-Access PDU Session Service Flow Update Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current 5G network architectures lack an efficient update procedure for multi-access PDU sessions, particularly in managing service flows across different access technologies, which limits the ability to dynamically allocate transmission resources and adjust Quality of Service (QoS) profiles.
Innovation Solution
A communication method and apparatus that enable a terminal device to send request messages to a core network element using multiple access technologies, allowing for the addition, update, or deletion of service flows, and the allocation of transmission resources, while updating QoS profiles based on response messages received from the core network element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a multi-access PDU session is established to support multiple access technologies, then the network can provide diverse access options and improve service flexibility, but the current architecture lacks an efficient update procedure for managing service flows across different access technologies
Solution Approach 1:
The update procedure is segmented into distinct phases: receiving the update request message, determining the updated service flow, obtaining QoS parameters, and sending the response message. This segmentation allows complex multi-access PDU session updates to be managed through standardized, manageable steps, resolving the contradiction between versatility and complexity.
Solution Approach 2:
The core network element sends a response message back to the terminal device containing QoS parameters for the updated service flow. This feedback mechanism enables the terminal to properly configure and manage service flows across multiple access technologies, maintaining system complexity at acceptable levels while achieving versatile service flow management.
2Productivity
If the terminal device sends request messages using only one access technology, then the signaling overhead is reduced, but the ability to dynamically allocate transmission resources across multiple access technologies is limited
Solution Approach 1:
The request message structure is designed to be universal, allowing it to be sent using any access technology (3GPP or non-3GPP) while containing information about service flows that can be transmitted across multiple access technologies. This multi-functional message design enables efficient resource allocation without increasing signaling overhead, as the same message format serves multiple purposes.
Solution Approach 2:
The core network element acts as an intermediary that receives the request message, determines the updated service flow, obtains QoS parameters from appropriate data networks, and formulates the response message. This intermediary function ensures that QoS parameters are properly obtained and configured regardless of which access technology is used for signaling, preventing information loss while maintaining efficient resource allocation.
3Reliability
If QoS parameters are obtained for all access technologies in advance, then the service flow transmission can be optimized, but the network element must manage complex QoS configurations across multiple access technologies
Solution Approach 1:
The QoS parameters are obtained dynamically during the update procedure rather than being pre-configured for all access technologies. The core network element obtains QoS parameters specifically for the updated service flow based on the current network state and requirements. This dynamic approach ensures optimal service transmission quality while avoiding the complexity of managing static QoS configurations across all possible access technologies.
Data Source
AI summary
A communication method and a communications apparatus, where the method includes: sending, by a terminal device, a request message to a first core network element using a first access technology, where the request message requests to newly add or update a service flow; receiving, by the terminal device using the first access technology or a second access technology, a response message from the first core network element; and transmitting, by the terminal device, the service flow based on the response message using the second access technology or both the first access technology and the second access technology.