MME Packet Data Network Connection Transfer
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Solution Overview
Problem
Current communication systems lack the ability to seamlessly transfer packet data network connections from one network function instance to another within a network function set without disrupting service, especially in scenarios where a network function instance fails or is scaled in, leading to loss of connections and increased operational expenses.
Innovation Solution
The apparatus and method enable the transfer of packet data network connections from one network function instance to another within the same network function set by maintaining context and using information like international mobile subscriber identity and fully qualified domain names, allowing for smooth continuity during failures or scale-ins without tearing down existing connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If packet data network connections are transferred from one network function instance to another within the same network function set, then network resilience and service continuity are improved, but device complexity and information management requirements increase
Solution Approach 1:
The patent applies preliminary action by storing information about the network function set identification before any failure occurs. When a network function instance becomes unavailable, the mobility management entity can immediately transfer the packet data network connection to another instance within the same set using the pre-stored identification information, avoiding service disruption and eliminating the need for complex real-time discovery procedures
Solution Approach 2:
The patent applies copying by maintaining context information including international mobile subscriber identity, international mobile equipment identity, and other connection parameters that can be transferred to another network function instance. This copying of essential identification and context data enables seamless connection transfer without requiring complex reconstruction procedures
2Duration of action of stationary object
If packet data network connections are transferred without re-establishment during network function instance failure, then service continuity is improved, but information management complexity increases
Solution Approach 1:
The patent applies continuity of useful action by transferring the packet data network connection with its existing context rather than tearing it down and re-establishing it. The mobility management entity maintains the connection's identity and parameters, allowing the connection to continue seamlessly from one network function instance to another, ensuring uninterrupted service
Solution Approach 2:
The patent stores necessary context information about the packet data network connection in advance, including international mobile subscriber identity, international mobile equipment identity, and other relevant parameters. This pre-stored information is readily available when transfer is needed, preventing information loss and enabling immediate connection transfer without re-establishment
Data Source
AI summary
There is provided an apparatus comprising means for receiving information about an identification of a network function set associated with at least one packet data network connection. The means is further configured for, in response to receiving an indication that a network function instance of the network function set supporting the at least one packet data network connection is no longer available, transferring the at least one packet data network connection from the network function instance to another network function instance comprised within the network function set.