5G QoS Flow Mapping for End-to-End Transport Path Assurance
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Solution Overview
Problem
The 5G mobile communication system lacks an effective mechanism to provide end-to-end quality of service (QoS) guarantees due to inconsistent QoS definitions between the access network, transport network, and core network, leading to suboptimal service performance.
Innovation Solution
A communication method and apparatus that utilizes a session management function network element to determine and enforce TN QoS parameters based on a mapping rule, ensuring consistent QoS definitions across the access, transport, and core networks, thereby providing end-to-end QoS guarantees at a QoS flow granularity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QoS definitions are unified across access network, transport network, and core network, then end-to-end QoS guarantee is improved, but device complexity and implementation difficulty increase
Solution Approach 1:
The patent introduces a transport network control network element as an intermediary between the access network and core network. This intermediary receives path establishment requests from the session management function, determines appropriate TN transmission paths based on QoS parameters, and establishes transport network paths that satisfy end-to-end QoS requirements. The intermediary absorbs the complexity of QoS coordination across different networks, allowing unified QoS definition without requiring complex direct coordination between all network elements.
2Measurement precision
If QoS parameters are mapped based on service type, access network device, and mobile gateway, then QoS precision and service differentiation are improved, but measurement and configuration difficulty increase
Solution Approach 1:
The patent implements preliminary configuration of QoS parameter mapping rules in the transport network control network element. The mapping rules, which associate QoS parameters with service types, access network devices, and mobile gateways, are pre-established before actual service deployment. When a path establishment request arrives, the control network element directly applies these pre-configured mapping rules to determine appropriate TN QoS parameters, avoiding complex real-time measurements and configurations.
3Manufacturing precision
If path establishment requests include detailed QoS parameters and identifiers, then QoS guarantee accuracy is improved, but information transmission overhead increases
Solution Approach 1:
The patent segments the QoS information transmission into multiple stages: (1) The session management function sends a path establishment request to the transport network control network element containing necessary QoS parameters and identifiers; (2) The transport network control network element processes this information and determines the appropriate TN transmission path; (3) The control network element sends back path establishment response containing the determined path information. This segmentation allows detailed QoS parameters to be transmitted only when necessary (during path establishment), reducing overall information overhead while maintaining QoS guarantee accuracy.
Data Source
AI summary
A communication method is disclosed. The method includes: A session management function network element sends a first path establish request to a transport network control network element, where the first path establish request includes an identifier of an access network device, an identifier of a mobile gateway selected for a session, and a first transport network (TN) Quality of Service (QoS) parameter of a first QoS flow in the session, and the first TN QoS parameter of the first QoS flow is determined based on a TN QoS parameter mapped to a first service type of the first QoS flow, the access network device, and the mobile gateway. The session management function network element receives a first path establish response from the transport network control network element, where the first path establish response includes information about a first TN transmission path of the first QoS flow.