Mobile Device Mobility Management Layer Timer Mechanism
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Solution Overview
Problem
In the 3GPP mobile communication structure, the mobility management layer of a mobile device can become stuck in a waiting state if the network fails to respond, preventing it from providing other services.
Innovation Solution
A timer (T3240) is activated when the mobility management layer enters a waiting state, and it exits this state either upon receiving a command from the network or after the timer expires, allowing the mobile device to transition to an idle state and release radio resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobility management layer waits for network commands in state 9, then the device can receive network control instructions, but the device cannot provide other services when the network fails to respond
Solution Approach 1:
The patent applies preliminary action by setting a timer (T3240) in advance when entering state 9, which automatically triggers a timeout mechanism before the network can fail to respond indefinitely. This preliminary timing action ensures the device will eventually exit the waiting state and resume service provision capability, resolving the contradiction between waiting for network commands and maintaining service productivity.
2Stability of the object's composition
If the mobility management layer remains in state 9 waiting for network commands, then the device maintains connection readiness, but the radio resources are occupied unnecessarily
Solution Approach 1:
The timer mechanism initiates a countdown from the moment state 9 is entered, creating a preliminary time-bound expectation. When the timer expires, the device automatically transitions out of state 9, thereby releasing radio resources while having maintained connection readiness only for the necessary duration, thus resolving the contradiction between stability and resource consumption.
Solution Approach 2:
The device performs self-service by autonomously managing its own state transition based on the timer expiration. When the network fails to respond, the device independently detects the timeout condition and exits state 9 without requiring network intervention, thereby freeing radio resources while maintaining the ability to re-establish connection if needed, balancing stability and energy efficiency.
3Productivity
If the mobility management layer uses a timer to exit waiting state, then the device can resume services, but the system complexity increases
Solution Approach 1:
The patent applies parameter changes by utilizing an existing timer parameter (T3240) from the 3GPP specification rather than creating a new complex timing mechanism. By changing the state management approach to incorporate this predefined timer parameter, the device achieves service resumption capability with minimal additional complexity, as the timer behavior is already standardized and understood within the mobile communication system.
Data Source
AI summary
After a mobility layer of a mobile device enters a waiting state, a timer T3240 is activated. The mobile device is configured to await further instructions from a network system before the timer T3240 expires and control the mobility layer to leave the waiting state if the timer T3240 expires, thereby improving system efficiency.