Wireless Apparatus Backoff Timer for M2M Network Overload
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Solution Overview
Problem
In machine-to-machine (M2M) wireless communication networks, when a base station or evolved packet core network is overloaded, wireless apparatuses repeatedly attempt to set up connections, leading to delayed connection establishment and signal overload, with existing solutions failing to provide an efficient mechanism for connection setup.
Innovation Solution
A wireless apparatus enters a temporary waiting status for a predetermined waiting duration after transmitting a connection request, allowing the base station to determine its status and allocate waiting durations to prevent simultaneous reconnection attempts, thereby optimizing connection retry times and reducing network overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If wireless apparatuses repeatedly attempt to set up connections immediately after rejection, then connection establishment speed is improved, but network overload worsens
Solution Approach 1:
The patent implements periodic action by introducing a backoff timer that forces wireless apparatuses to wait for a predetermined period before retrying connection requests. This periodic interruption prevents continuous immediate retry attempts, reducing network overload while maintaining eventual connection establishment. The timer creates a structured rhythm of connection attempts rather than continuous flooding.
Solution Approach 2:
The patent applies preliminary action by having the base station send a rejection message with embedded timer information before the wireless apparatus actually retries. This preliminary rejection with timing guidance allows the network to prepare for the upcoming retry, preventing sudden traffic spikes and enabling gradual load management as devices resume connection attempts after the specified duration.
2Object-affected harmful factors
If wireless apparatuses wait for a predetermined duration before retrying connections, then network overload is reduced, but connection establishment time increases
Solution Approach 1:
The patent implements parameter changes by dynamically adjusting the backoff timer duration based on network conditions and device characteristics. The timer value is not fixed but can be modified to optimize the balance between reducing network overload and minimizing connection establishment time. This allows the system to adapt the waiting period to current load conditions, ensuring efficient resource utilization while maintaining acceptable connection speeds.
3Productivity
If the base station accepts all connection requests immediately, then connection setup efficiency is improved, but network stability worsens under overload conditions
Solution Approach 1:
The patent implements feedback by having the base station monitor network load conditions and send rejection messages with backoff timer information to wireless apparatuses when overload is detected. This feedback loop allows the network to communicate its current state to devices, guiding their retry behavior. The continuous feedback mechanism enables the system to maintain stability under varying load conditions while preserving connection setup efficiency when resources are available.
Data Source
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AI summary
A wireless apparatus, a base station, and a communication controlling method are provided. A communication controlling system comprises the wireless apparatus and the base station. The wireless apparatus is configured to transmit a connection request to the base station and then enter a connection setup communication procedure. The wireless apparatus enters a temporary waiting status during a waiting duration after transmitting the connection request. The wireless apparatus stays in the connection setup communication procedure in the temporary waiting status. The communication controlling method is able to perform the same operations as those performed by the wireless apparatus and the base station is able to perform the operations corresponding to the wireless apparatus.