PDU Set Traffic Handling Across NG-RAN Changes Without QoS Signaling
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing PDU set based traffic without separate PDU set quality of service (QoS) parameter information, particularly when terminals change radio access networks (NG-RAN) due to movement, leading to inefficiencies in service handling.
Innovation Solution
A method and apparatus are introduced to enable PDU set based service handling by using PDU set integrated handling indication (PSIHI) information with a PSIHI value set to false, allowing the session management function (SMF) and radio access network (RAN) to support PDU set based packet handling without explicit QoS parameters, and facilitate seamless service continuity during NG-RAN changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If PDU set based service handling is implemented without separate QoS parameters, then device complexity and signaling overhead are reduced, but service management precision and QoS control capability deteriorate
Solution Approach 1:
The patent merges PDU set integrated handling indication (PSIHI) information with existing QoS parameters to enable PDU set based service handling without requiring separate dedicated QoS parameters. This combining approach reduces signaling overhead and device complexity while maintaining sufficient QoS control capability through the integrated indication mechanism.
Solution Approach 2:
The PSIHI information serves multiple functions: it indicates PDU set based handling support, enables service continuity during NG-RAN changes, and works with existing QoS parameters. This multi-functionality reduces the need for additional dedicated parameters and procedures, thereby reducing complexity while maintaining precision.
2Reliability
If PDU set integrated handling indication is used during NG-RAN changes, then service continuity is improved, but information accuracy and QoS parameter reliability deteriorate
Solution Approach 1:
The patent applies preliminary action by pre-configuring PSIHI information in the network before NG-RAN changes occur. This allows the target RAN to be pre-aware of PDU set based service requirements, ensuring seamless service continuity during handover without losing critical QoS information. The indication is prepared in advance and transferred through existing signaling paths.
3Loss of energy
If separate QoS parameters are not transferred for PDU set services, then signaling overhead and network load are reduced, but traffic management capability and service differentiation deteriorate
Solution Approach 1:
The patent extracts the essential PDU set handling indication (PSIHI) from the complete set of QoS parameters and transfers only this critical information element. This extraction approach reduces signaling overhead by eliminating redundant parameter transmissions while retaining the core capability for PDU set based traffic management and service differentiation.
Data Source
AI summary
The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. A method performed by a session management function (SMF) in a communication system is provided. The method includes identifying that a policy and charging control (PCC) rule comprises at least one of first information on a downlink (DL) protocol description or second information on protocol data unit (PDU) set quality of service (QoS) parameters, in case that the PCC rule comprises the first information and does not comprise the second information, transmitting, to a radio access network (RAN), third information associated with a PDU set information marking, and receiving, from the RAN, fourth information indicating that a PDU set based handling is supported.