Base Station NAS Reroute Without S1 Connection Setup
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Solution Overview
Problem
In the context of the DECOR (Dedicated Core Network) for LTE, the existing procedure for rerouting NAS messages from an MME to an M2M MME involves unnecessary assignment and reassignment of S1AP IDs, leading to inefficiencies in establishing connections.
Innovation Solution
The proposed solution involves a base station and management apparatus configuration that allows for rerouting of NAS information without establishing an SI connection for the reroute source, thereby avoiding the unnecessary assignment of identifiers, and reusing existing identifiers for the reroute destination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an S1 connection is established for the reroute source MME during NAS message rerouting, then the connection can be properly managed, but unnecessary S1AP ID assignment and reassignment occurs leading to inefficiency
Solution Approach 1:
The patent extracts the unnecessary S1 connection establishment step from the rerouting process. By removing the requirement to establish an S1 connection for the reroute source MME, the patent eliminates the wasteful S1AP ID assignment and reassignment operations while maintaining reliable connection management through alternative mechanisms.
Solution Approach 2:
The patent performs preliminary assignment of S1AP ID for the reroute destination MME before actual connection establishment. This allows the base station to pre-configure the identifier needed for the destination MME, avoiding the need to reassign identifiers during the rerouting process and improving overall efficiency.
2Reliability
If S1AP ID is reassigned for reroute destination, then proper identification is ensured, but time is lost due to unnecessary assignment operations
Solution Approach 1:
The patent performs the S1AP ID assignment for the reroute destination MME in advance, before the actual rerouting occurs. This preliminary action ensures that the identifier is already prepared and available, eliminating the need for time-consuming reassignment operations during the critical rerouting phase.
Solution Approach 2:
The patent separates the S1AP ID assignment operation from the rerouting operation. By assigning the S1AP ID independently in advance, the patent decouples these operations so that the rerouting process does not need to wait for or perform identifier assignment, thereby reducing overall time loss.
Data Source
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AI summary
Techniques are disclosed for establishing connection to a reroute destination MME without configuring unnecessary identifiers. One aspect of the present invention relates to a base station, comprising: a connection request processing unit configured to, upon receiving a connection request from user equipment, perform a connection operation on the user equipment; and a core network connection unit configured to, upon receiving a reroute message to indicate a reroute from a first management apparatus to a second management apparatus, transmit NAS (Non Access Stratum) information in the reroute message to the second management apparatus without establishing an S1 connection for the first management apparatus and the user equipment.