5G IPX Traffic Routing via Network Slicing and QoS Path Selection
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Solution Overview
Problem
Current technologies lack an efficient method to implement network slicing in Internetwork Packet Exchange (IPX) networks for 5G mobile roaming, which is essential for providing different Quality of Service (QoS) to various 5G use cases like Enhanced Mobile Broadband (eMBB), Massive Internet of Things (mIoT), and Ultra-Reliable and Low Latency Communications (uRLLC).
Innovation Solution
The implementation of a 5G HTTP/2 Proxy in the IPX network that captures and modifies Protocol Data Unit (PDU) Session Create request and response messages to select and configure routing paths with specific Quality of Service (QoS) based on Single-Network Slice Selection Assistance Information (S-NSSAI), using either UPF-Proxies or Software-Defined Networking (SDN) switches to steer data traffic along predefined paths, ensuring appropriate bandwidth, latency, and reliability for each use case.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If home-routed roaming scheme is used to provide HPLMN control over service quality, then service quality control is improved, but traffic routing complexity increases due to traversal through IPX network
Solution Approach 1:
The patent introduces an IPX network as an intermediary between HPLMN and VPLMN, which contains multiple predefined routing paths with different QoS characteristics. This intermediary enables the HPLMN to control service quality by selecting appropriate routing paths for different network slices while managing the complexity of home-routed traffic routing through structured QoS-based path selection.
2Adaptability or versatility
If network slicing is implemented to provide different QoS for different 5G use cases, then service differentiation is improved, but implementation complexity in IPX network increases
Solution Approach 1:
The patent segments the IPX network into multiple predefined routing paths, each optimized for specific QoS requirements (e.g., low latency for uRLLC, high bandwidth for eMBB). This segmentation enables network slicing by allowing different 5G use cases to be routed through appropriate paths based on their QoS needs, thereby achieving service differentiation while managing implementation complexity through pre-configured paths.
Solution Approach 2:
The patent changes the routing parameter selection based on QoS requirements of different network slices. By modifying routing decisions according to QoS parameters (bandwidth, latency, reliability) associated with each PDU session, the system achieves service differentiation for various 5G use cases while maintaining manageable complexity through parameter-based routing selection.
3Adaptability or versatility
If multiple predefined routing paths with different QoS are deployed in IPX network, then QoS selection capability is improved, but network configuration complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple routing paths in the IPX network with different QoS characteristics before actual 5G traffic arrives. Each routing path is pre-optimized for specific QoS requirements (e.g., low latency, high bandwidth). When PDU sessions are established, the system can quickly select from these pre-configured paths based on QoS requirements, thereby achieving QoS selection capability while reducing network configuration complexity during operation.
Data Source
AI summary
A system and method for routing of 5G mobile data traffic along a routing path in an Internetwork Packet Exchange (IPX) network having requisite Quality of Service (QoS). A proxy is deployed in the IPX network to intercept Session Create request and response messages exchanges between the home network and the visited network. The routing platform extracts Single-Network Slice Selection Assistance Information (S-NSSAI) attribute and uses this attribute and the geographic locations of the visited network and the home network to select a routing path in the IPX network having requisite QoS for the network slice use case. The routing platform uses layer-3 routing technique to anchor User Plane Function (UPF) Proxies deployed at different routing paths in the IPX network. Alternately, the routing platform uses layer-2 routing technique, with Software-Defined Networking (SDN) controller and SDN-switches to route traffic via the selected routing path in the IPX network.