QoS Flow Migration Across Paired PDU Sessions for Traffic Surges
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Solution Overview
Problem
Conventional methods for handling sudden traffic surges in metaverse applications with dual connectivity fail to maintain reliability and scalability, leading to potential data loss and network degradation due to insufficient resource allocation and high control plane delays.
Innovation Solution
A control plane entity manages data transmission by determining flow migration capabilities and coordinating between paired PDU sessions, allowing for redundant or parallel transmission to handle sudden traffic surges, ensuring stable and robust network performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant transmission with dual connectivity is used for supporting metaverse applications, then reliability is improved, but network resource consumption increases and scalability deteriorates
Solution Approach 1:
The patent implements dynamic flow migration capability that allows QoS flows to be migrated between paired PDU sessions based on real-time traffic conditions. When traffic surge is detected, the system dynamically adjusts which PDU session handles which QoS flow, enabling the network to adapt to changing demands without establishing additional PDU sessions, thus maintaining scalability while preserving reliability through flexible resource allocation.
Solution Approach 2:
The system changes the operational parameters of existing PDU sessions by enabling flow migration capability, which allows QoS flows to be dynamically assigned between paired sessions. This parameter change enables the network to handle traffic surges by redistributing existing resources rather than consuming additional network capacity, resolving the contradiction between reliability and scalability.
2Reliability
If conventional dual connectivity methods are used to handle traffic surges, then redundancy is maintained, but control plane delays increase and data loss occurs
Solution Approach 1:
The patent establishes paired PDU sessions in advance with flow migration capability configured before traffic surges occur. When traffic demands increase, the system can immediately migrate QoS flows between the pre-configured sessions without requiring control plane intervention for session establishment, thereby eliminating control plane delays while maintaining redundancy through the pre-established paired sessions.
Solution Approach 2:
The flow migration mechanism acts as an intermediary that enables seamless traffic redistribution between paired PDU sessions without requiring control plane involvement. This intermediary mechanism allows user plane entities to autonomously migrate QoS flows based on traffic conditions, bypassing control plane delays while preserving the redundant transmission path.
3Reliability
If paired PDU sessions are established with duplicated data packets for high reliability, then transmission reliability is improved, but network resource allocation becomes insufficient during traffic surges
Solution Approach 1:
The system implements dynamic resource allocation through flow migration, where QoS flows can be migrated between paired PDU sessions based on real-time traffic conditions. During traffic surges, the system dynamically redistributes QoS flows to utilize available network resources efficiently, preventing resource exhaustion while maintaining transmission reliability through the flexible reconfiguration of existing paired sessions.
Data Source
AI summary
Methods and apparatus are provided for managing data traffic transmission of a plurality of traffic flows associated with a pair of PDU sessions, which relate to communications networks. A UE is connectable with a first AN using a first PDU session, and connectable with a second AN using a second PDU session, simultaneously. The first and the second ANs are of the same RAN type. A first CPF is disclosed to obtain first indication information indicative of whether data transmission of the UE supports flow migration capability. The flow migration capability indicates a capability of switching the data traffic transmission between redundant transmission and parallel transmission. If supported, the first CPF determines flow migration information that comprises mapping information among traffic flows of the first PDU session and the second PDU session and provides the flow migration information to the UE and/or related UPF.