Route Delivery Method Using Location-Based Client IP Segmentation
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Solution Overview
Problem
In a CU-separated system architecture, there is a risk that different UEs may be assigned the same network segment route when a third-party server assigns UE IP addresses, leading to incorrect forwarding of downlink data packets.
Innovation Solution
A route delivery method where a control plane network element device determines a client IP address based on the location information of UEs, ensuring that each UE is assigned a unique IP address from a different network segment by accessing the third-party server with distinct client IP addresses, thereby ensuring correct routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a third-party server assigns UE IP addresses using a single PGW IP address, then the IP address assignment process is simplified, but different UEs may be assigned the same network segment route causing incorrect downlink data packet forwarding
Solution Approach 1:
The patent segments the PGW IP address into multiple client IP addresses, where each client IP address corresponds to a specific UP network element device or TA list. This segmentation allows the third-party server to assign UE IP addresses from different network segments based on different client IP addresses, ensuring that different UEs are assigned to different network segments and preventing route conflicts while maintaining simplified assignment processes.
2Productivity
If multiple UP network elements are managed by one CP network element, then resource utilization is improved, but route delivery accuracy deteriorates when UEs from different TA lists share the same PGW IP address
Solution Approach 1:
The patent applies local quality by associating different client IP addresses with different local characteristics (TA lists or UP network element devices). Each client IP address carries local quality information that enables the third-party server to assign UE IP addresses with appropriate network segment characteristics, ensuring that UEs from different TA lists receive routes with correct local quality attributes for accurate delivery.
3Ease of operation
If the same PGW IP address is used for multiple UEs, then the interaction between CP network element and third-party server is simplified, but the ability to deliver correct routes to different UEs is compromised
Solution Approach 1:
The patent introduces dynamics by making the client IP address a variable parameter that changes based on the UE's location information and TA list. Instead of using a static single PGW IP address, the system dynamically selects appropriate client IP addresses from multiple available addresses, enabling the same CP network element to interact with the third-party server in multiple ways to achieve correct route delivery for different UEs.
Data Source
AI summary
The application relates to a route delivery method and device. A location information of user equipment UE is received by a control plane network element device. A client IP address used by the control plane network element device to access a third-party server is determined based on the location information by the control plane network element device. An access request message is sent by the control plane network element device to the third-party server carrying the client IP address. A UE IP address assigned by the third-party server to the UE based on the client IP address is received by the control plane network element device. A user plane network element device configured to deliver a route to the UE is determined based on the UE IP address and the location information by the control plane network element device.