IPsec Tunnel DSCP Mapping for QoS Differentiation
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Solution Overview
Problem
In wireless communications, particularly in 5G networks, non-public networks face challenges in guaranteeing data transmission quality and service accessibility when terminals access public network services via non-public networks, as the first network cannot distinguish between control signaling and user-plane data, nor can it accurately map Quality of Service (QoS) information requirements for IPsec tunnels, leading to unreliable service performance for critical services like IMS voice or emergency services.
Innovation Solution
The method involves obtaining and processing specific information to determine a Differentiated Services Code Point (DSCP) corresponding to IPsec tunnels, which includes quality of service information, data type, and mapping relationships, allowing the network to differentiate between control signaling and user-plane data and apply appropriate QoS guarantees, ensuring that the first network can support QoS requirements for both signaling and user-plane data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the first network treats all IPsec tunnel data uniformly without differentiation, then the network operation is simple, but the QoS guarantee reliability deteriorates because control signaling and user-plane data cannot be distinguished
Solution Approach 1:
The patent segments IPsec tunnel data into distinct categories by introducing differentiated services code points (DSCPs) to mark control signaling and user-plane data separately. This segmentation allows the network to apply different QoS policies to different data types, thereby improving QoS guarantee reliability while maintaining manageable network operation complexity through standardized marking mechanisms.
Solution Approach 2:
The patent applies local quality by assigning different QoS characteristics to different parts of the IPsec tunnel data flow. Specifically, control signaling is marked with specific DSCP values to receive priority treatment, while user-plane data receives standard treatment. This localized differentiation ensures critical signaling receives reliable QoS guarantees without unnecessarily complicating the handling of all data.
2Measurement precision
If the network implements detailed DSCP mapping for all IPsec tunnels, then the QoS mapping precision improves, but the device complexity increases due to extensive mapping relationship management
Solution Approach 1:
The patent changes the parameter representation by using predefined DSCP value assignments for different IPsec tunnel types. Instead of maintaining complex mapping relationships, the system uses standardized DSCP parameters that directly indicate the required QoS treatment. This parameter change simplifies the mapping management while maintaining precise QoS differentiation between control signaling and user-plane data.
3Adaptability or versatility
If non-public networks provide full coverage services, then the service accessibility improves, but the network complexity increases due to integration with public network services
Solution Approach 1:
The patent applies universality by enabling the non-public network to handle multiple service types through a unified QoS marking mechanism. The same DSCP-based differentiation approach works for both control signaling and user-plane data across different service scenarios, including IMS voice and emergency services. This universal mechanism improves service accessibility without proportionally increasing network integration complexity.
Data Source
AI summary
A method for guaranteeing data transmission and a communications device are provided. A method for guaranteeing data transmission applied to a first communications device includes: obtaining first information; and determining, based on the first information, a differentiated services code point DSCP corresponding to an Internet protocol security tunnel IPsec tunnel; where the first information includes at least one of the following: quality of service QoS information of a second network tunnel, data type information, a mapping relationship between differentiated service code points DSCPs and QoS information, a first QoS information requirement, and a first DSCP.