Multi-Access PDU Link Selection for Service Flow Requirements
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Solution Overview
Problem
In next-generation wireless communication systems, the establishment of multi-access PDU sessions often results in transmission links failing to meet the requirements of service flows due to suboptimal selection based on current technologies.
Innovation Solution
A communication method and apparatus that enables terminal devices or user plane network elements to autonomously determine transmission links for service flows based on service flow identifiers and indication information, considering user preferences, application preferences, local policies, link status, and transmission conditions to ensure efficient link selection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-access PDU session is established between UE and UPF network element using multiple access technologies, then service flow transmission capability is improved, but transmission link selection accuracy deteriorates
Solution Approach 1:
The session management network element performs preliminary actions by determining indication information about transmission link selection modes and service flow identifiers before service flow transmission. This indication information is provided to the terminal device or user plane network element in advance, enabling them to select appropriate transmission links based on pre-configured criteria rather than making suboptimal selections during actual transmission.
Solution Approach 2:
The system implements feedback mechanisms where the session management network element receives service flow information, determines appropriate transmission link selection modes, and provides indication information back to the terminal device or user plane network element. This closed-loop feedback enables continuous optimization of transmission link selection based on network status and service requirements.
2Productivity
If autonomous determination of transmission link is enabled at terminal device or user plane network element, then transmission efficiency is improved, but device complexity increases
Solution Approach 1:
The terminal device or user plane network element performs self-service by autonomously determining transmission links for service flows based on indication information received from the session management network element. This self-service capability eliminates the need for centralized link determination, reducing network signaling overhead and improving transmission efficiency while distributing the determination logic to edge devices.
Solution Approach 2:
The system changes parameters by providing indication information that specifies transmission link selection modes (such as smallest delay mode, load-balancing mode, active-standby mode) rather than hardcoding complex determination algorithms in devices. This parameter-based approach simplifies device complexity while enabling flexible and efficient transmission link selection through configurable modes.
Data Source
AI summary
A communication method includes a first device that receives first indication information and a service flow identifier of a protocol data unit (PDU) session from a session management network element, where the first indication information indicates the first device to determine a transmission link for a service flow of the PDU session. The first device selects the transmission link for the service flow of the PDU session based on the service flow identifier and the first indication information.