HSS MME Information Deletion via Version Tracking
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Solution Overview
Problem
The Home Subscriber Server (HSS) in wireless network systems cannot determine whether to delete Mobility Management Entity (MME) information due to the inability to obtain the MME's version, leading to incomplete or unnecessary information retention.
Innovation Solution
The MME provides its version information to the HSS, allowing the HSS to determine whether to delete registration information, through messages such as Update Location and Context Response, ensuring accurate and timely deletion of MME data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HSS does not obtain MME version information, then the double registration mechanism can be maintained, but the HSS cannot determine whether to delete MME registration information
Solution Approach 1:
The MME includes its version information in the Update Location message before the HSS needs to make a deletion decision. This preliminary provision of version information allows the HSS to accurately determine whether to delete the MME registration information without needing to implement complex version detection mechanisms.
Solution Approach 2:
The Update Location message serves as an intermediary carrier that transports MME version information from the MME to the HSS. This message structure acts as a mediator that enables version information exchange without requiring direct version detection capabilities in the HSS.
2Reliability
If the HSS deletes MME registration information without version information, then data redundancy is reduced, but necessary information may be incorrectly deleted
Solution Approach 1:
The patent changes the parameter of version information from being undetectable to being explicitly provided in the Update Location message. This parameter change enables the HSS to make accurate deletion decisions by comparing version information, thereby retaining necessary data while removing redundant information.
3Reliability
If the HSS obtains MME version information through message exchange, then deletion accuracy is improved, but signaling overhead increases
Solution Approach 1:
The MME version information is merged into the existing Update Location message that is already being exchanged between MME and HSS for registration purposes. By combining version information transmission with the existing signaling flow, the patent avoids generating additional separate messages, thereby improving deletion accuracy without significantly increasing signaling overhead.
Data Source
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AI summary
A mobility management entity (MME) information deleting method includes: receiving a message sent by a first MME; and if needed, determining whether it is necessary to delete information about the first MME according to version information about the first MME. The method further includes: receiving a message sent by a target MME, in which the message carries version information about a source MME acquired by the target MME or an indication of deleting information about the source MME added by the target MME; and deleting the information about the source MME according to the message. A network device for deleting MME information is also provided. According to the present invention, a network device, such as a home subscriber server (HSS), is capable of acquiring version information about a source MME or receiving an indication of deleting information about the source MME, so as to determine whether it is necessary to delete the information about the MME.