QUIC Connection Mapping for Accurate QoS Flow Steering
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Solution Overview
Problem
Current mobile communication technologies lack effective methods to accurately associate User Datagram Protocol (UDP) based connection identifiers with Quality of Service (QoS) flows, which is essential for precise Access Traffic Steering, Switching, and Splitting (ATSSS) functionality, particularly in 5G networks, leading to inaccurate Round-Trip Time (RTT) measurements for latency-sensitive services.
Innovation Solution
Implementing the QUIC-Low Layer (QUIC-LL) protocol to associate QUIC connections with QoS flows, enabling accurate RTT measurements by establishing mappings between QUIC connections and QoS flows using User Datagram Protocol (UDP) based identifiers, allowing for efficient traffic steering and splitting across 3GPP and non-3GPP access networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If UDP based connection identifiers are used for traffic steering, then traffic management flexibility is improved, but accurate association with QoS flows cannot be achieved
Solution Approach 1:
The patent introduces a mapping mechanism that acts as an intermediary between UDP connection identifiers and QoS flow identifiers. This mapping table stores the correspondence relationships, allowing the system to maintain flexible UDP-based connections while accurately associating them with specific QoS flows through the mapping layer.
Solution Approach 2:
The patent adds a new dimension to the identification system by introducing mapping relationship records that connect UDP connection identifiers with QoS flow identifiers. This creates a two-dimensional association structure where connections can be managed independently while maintaining precise QoS flow mapping through the additional mapping layer.
2Reliability
If multiple access networks are used for traffic steering, then network connectivity and reliability are improved, but RTT measurement accuracy deteriorates
Solution Approach 1:
The patent segments the RTT measurement process by establishing separate mappings for different access networks (3GPP and non-3GPP). Each access network's connections are independently mapped to QoS flows, allowing accurate RTT measurements to be performed separately for each access type while maintaining overall network reliability through multi-access connectivity.
Data Source
AI summary
Methods, apparatus, and systems that can be implemented to associate User Datagram Protocol (UDP) based connection identifiers with appropriate Quality of Service (QoS) flows are disclosed to enable Access Traffic Steering, Switching and Splitting functionality at lower layers and to allow accurate measurements of Round-Trip Time for all traffic on a session. In one example aspect, a wireless communication method includes determining, by one or more nodes in a core network for a session that comprises at least one QoS flow, at least two identifiers identifying two connections associated with the at least one QoS flow. The two connections are established according to a UDP based protocol. The method also includes establishing, by the one or more nodes in the core network, a mapping between the at least two connection identifiers and the at least one QoS flow.