MTC Periodic Update Timer Synchronization via Paging Flag
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Solution Overview
Problem
Conventional methods for configuring periodic update timers in Machine Type Communication (MTC) devices lead to synchronization issues between service networks and MTC devices, resulting in unnecessary signaling interruptions and power consumption during timer reactivation processes.
Innovation Solution
A method involving a paging message with a timer update flag is used to synchronize periodic update timers, allowing MTC devices to report or reactivate timers efficiently, reducing signaling messages and maintaining continuous wireless communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the service network assigns zero value for periodic LU timer T3212 to deactivate the timer, then power consumption is reduced, but synchronization between service network and MTC devices is lost
Solution Approach 1:
The service network sends a paging message with a timer update flag to the MTC device. When the flag is set, the MTC device responds with a service request message containing its current timer value, allowing the network to verify synchronization status and resolve the information loss caused by deactivating the timer.
Solution Approach 2:
Before deactivating the periodic LU timer by assigning zero value, the service network establishes a feedback mechanism through paging messages with timer update flags. This preliminary setup ensures that synchronization information can be recovered when needed, preventing permanent loss of synchronization status.
2Reliability
If detachment and re-attachment procedures are performed to reactivate periodic update timers, then timer reactivation is achieved, but signaling interruptions increase
Solution Approach 1:
The invention extracts the timer reactivation function from the complex detachment and re-attachment procedure. By using a simple paging message with a timer update flag, the service network can reactivate timers without requiring full detachment and re-attachment, thereby eliminating unnecessary signaling interruptions while maintaining timer reactivation capability.
Solution Approach 2:
Instead of using detachment and re-attachment (a heavy-handed approach) to reactivate timers, the invention inverts the approach by using a lightweight paging message mechanism. This reversed strategy achieves timer reactivation with minimal signaling, solving the problem of excessive interruptions caused by the conventional method.
3Adaptability or versatility
If system information broadcasts are used to assign new timer values, then timer configuration is updated, but MTC devices with zero value configuration ignore the updates
Solution Approach 1:
The service network sends a paging message with a timer update flag specifically to MTC devices that have zero value configuration. When the flag is set, these devices are compelled to respond with a service request message, providing feedback that allows the network to push the correct timer values and restore configuration synchronization.
Solution Approach 2:
The paging message with the timer update flag serves as a preliminary anti-action against the ignoring behavior of MTC devices with zero value configuration. By proactively flagging the need for timer updates before the devices can ignore them, the network prevents configuration desynchronization from occurring in the first place.
Data Source
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AI summary
A Machine Type Communication (MTC) device including a wireless transceiver and a controller is provided. The wireless transceiver performs wireless transmission and reception to and from a service network. The controller receives a paging message including a timer update flag from the service network via the wireless transceiver, transmits a Service Request message to the service network via the wireless transceiver in response to the paging message including the timer update flag, and receives a downlink (DL) Information Transfer message including a value for a periodic update timer from the service network via the wireless transceiver.