Mobile Switch Terminal Unloading via Active Paging
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Solution Overview
Problem
The existing method for unloading user terminals in a switch pool network is time-consuming, taking 1-4 hours, which delays maintenance and affects user service quality.
Innovation Solution
A method that actively pages user terminals and reallocates temporary mobile subscriber identities with a NULL-network Resource identity, allowing for quicker release of signaling connections and transfer to other mobile switches, reducing unloading time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile switch waits for the user terminal to send periodic location update requests, then all user terminals can be transferred to other mobile switches, but the unloading process takes too long (1-4 hours)
Solution Approach 1:
The mobile switch sends a location update notification message to the user terminal in advance, proactively triggering the location update process before the periodic timer expires. This preliminary action initiates the transfer process earlier, reducing the overall unloading time from 1-4 hours to a much shorter duration while ensuring complete transfer of all user terminals.
Solution Approach 2:
The system implements a feedback mechanism where the mobile switch monitors the unloading process and sends location update notification messages to user terminals. When the mobile switch determines that unloading is needed, it actively notifies the user terminal, which then responds with a location update request. This feedback loop enables controlled and accelerated transfer of user terminals compared to passive waiting.
2Loss of time
If the mobile switch actively pages user terminals and reallocates TMSI, then unloading time is reduced, but the signaling connection release process becomes more complex
Solution Approach 1:
The mobile switch sends a location update notification message to the user terminal before the actual unloading occurs. This preliminary notification triggers the user terminal to initiate a location update request, which the mobile switch can then handle by reallocating TMSI with NULL-NRI. This sequence simplifies the overall process by preparing the user terminal in advance, reducing the complexity of the signaling connection release during the actual unloading.
Solution Approach 2:
Instead of waiting for the user terminal to periodically initiate location updates (passive approach), the system inverts the approach by having the mobile switch actively notify the user terminal to update its location. This inversion of the initiation role accelerates the unloading process while managing signaling complexity through controlled, on-demand updates rather than continuous periodic signaling.
Data Source
AI summary
A method and an apparatus for quickly unloading a terminal are provided. The method comprises: paging a user terminal which is registered in a mobile switch to unload through a wireless access node after the mobile switch to unload receives a command of unloading the user terminal; the mobile switch to unload detecting whether a paging acknowledgement returned from the user terminal is received, if yes, sending a message to notify that the user terminal is to be unloaded, and then releasing the current signaling connection with the user terminal.