SGW IP Attribute Notification for Accurate Charging
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Solution Overview
Problem
In the Evolved Packet Core (EPC) network, a new Serving Gateway (SGW) cannot learn the attribute of a User Equipment's (UE) IP address in a timely manner, leading to inaccurate charging by the Charging Gateway Function (CGF) entity.
Innovation Solution
The method involves notifying the attribute of the UE's IP address during session establishment and mobility management procedures, ensuring the new SGW receives this information promptly, allowing the CGF to accurately charge the UE based on the IP address attribute.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the new SGW is taken as the UE's SGW during mobility management, then mobility management is improved, but the new SGW cannot learn the attribute of the UE's IP address in time
Solution Approach 1:
The MME includes the UE's IP address attribute information in the session establishment request message before the SGW needs to use it for charging. This preliminary inclusion ensures the SGW receives the attribute information proactively during the handover process, eliminating the time delay that would otherwise occur when the SGW needs to query the PGW separately.
2Device complexity
If the SGW does not have the UE's IP address attribute information, then the network architecture is simplified, but charging accuracy deteriorates
Solution Approach 1:
The MME acts as an intermediary that collects the UE's IP address attribute information from the HSS and includes it in the session establishment request message to the SGW. This intermediary role ensures the SGW receives accurate charging information without the SGW needing to maintain complex storage mechanisms for all UE attributes.
Data Source
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AI summary
A method and a system for notifying an attribute of an Internet Protocol (IP) address and a Serving Gateway (SGW) are disclosed. When an SGW is taken as a User Equipment's (UE's) SGW, the new SGW can be notified of an attribute of the UE's IP address. The technology of notifying an attribute of an IP address in the disclosure can ensure that the new SGW can learn the attribute of the UE's IP address in time when the new SGW is taken as the UE's SGW Therefore, a charging gateway function entity connected with the new SGW can accurately charge the UE according to the attribute of the IP address.