Reflective DSCP Marking for Consistent 5G Uplink and Downlink QoS
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Solution Overview
Problem
Existing LTE/5G communications systems face challenges in ensuring that uplink and downlink carrier traffic maintain consistent Quality of Service (QoS) due to the lack of mechanisms to classify and retain QoS information for returning carrier traffic.
Innovation Solution
A method involving the use of a data structure, such as a flow table, to associate and store QoS parameters like DSCP or QFI with routing information, allowing the retrieval and application of the same QoS parameter for downlink carrier traffic, ensuring consistent QoS across both directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If QoS parameter is marked for uplink carrier traffic, then QoS control for uplink traffic is improved, but QoS consistency for downlink traffic deteriorates
Solution Approach 1:
The patent applies preliminary action by storing the uplink QoS parameter in a data structure before the downlink traffic arrives. The node receives uplink carrier traffic, extracts the QoS parameter, stores it in association with routing information in a data structure, and then uses this pre-stored parameter to mark the downlink carrier traffic when it arrives, ensuring QoS consistency without waiting for the downlink traffic to be processed
Solution Approach 2:
The patent uses a data structure as an intermediary to bridge the uplink and downlink QoS parameters. The data structure stores the QoS parameter received from uplink traffic and makes it available for marking downlink traffic, acting as a mediator that transfers QoS information between the two directions of communication
2Stability of the object's composition
If QoS parameter is stored and retrieved using data structure, then QoS consistency is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by using an existing data structure that serves multiple functions: it stores routing information for forwarding packets and simultaneously stores QoS parameters for traffic marking. This multi-functional use of the data structure avoids adding separate storage mechanisms, thereby reducing overall system complexity while maintaining QoS consistency
Data Source
AI summary
A method for marking a Quality of Service (QOS) for packet traffic on a connection between a User Equipment (UE) and a destination device. The method provides for receiving, from the UE, an Uplink (UL) carrier traffic destined for the destination device, the UL carrier traffic including a QoS parameter to indicate a class of QoS applied to the UL carrier traffic, associating the QoS parameter with routing information carried in the UL carrier traffic and storing the QoS parameter linked to the routing information in a data structure. The method further provides for receiving Downlink (DL) carrier traffic from the destination device, wherein the DL carrier traffic includes the routing information, and associating the routing information carried in the DL carrier traffic with the routing information stored in the data structure to retrieve the QoS parameter to mark QoS for the DL carrier traffic.