MTC Device Group Control via Dynamic APN-AMBR Adjustment
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Solution Overview
Problem
In mobile communication systems, the unregulated bit rates from Machine Type Communication (MTC) devices can cause network congestion, as they perform data transmission without adequate bit rate regulation, leading to potential overload in the network.
Innovation Solution
A method and apparatus that determine an Aggregate Maximum Bit Rate (AMBR) for each MTC device in a group by considering the number of devices requesting attachment and those already attached, using a timer to count devices and adjust the Access Point Name-Aggregate Maximum Bit Rate (APN-AMBR) accordingly, to prevent network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If MTC devices transmit data without adequate bit rate regulation, then data transmission capability is improved, but network congestion occurs
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the Aggregate Maximum Bit Rate (AMBR) parameter for MTC devices based on the number of attached devices. The HSS modifies the APN-AMBR value assigned to each MTC device according to the current attachment count, thereby controlling the total bit rate generated by the group while allowing individual devices to transmit data efficiently.
2Adaptability or versatility
If the number of MTC devices requesting attachment increases, then network coverage and service availability are improved, but aggregate bit rate control becomes more difficult
Solution Approach 1:
The patent implements feedback by establishing a closed-loop control mechanism where the HSS continuously monitors the number of MTC devices requesting attachment and already attached devices. Based on this feedback information, the HSS dynamically recalculates and updates the APN-AMBR parameter for each device, ensuring aggregate bit rate control adapts to changing network conditions and device counts.
3Object-affected harmful factors
If dynamic AMBR adjustment is implemented for each MTC device, then network congestion is prevented, but signaling overhead between HSS and MME increases
Solution Approach 1:
The patent applies preliminary action by pre-establishing the framework for dynamic AMBR adjustment during the initial attach procedure. The HSS sets up the monitoring mechanism and prepares to send updated APN-AMBR values proactively when attachment count changes occur, rather than reacting to congestion after it happens. This reduces the need for frequent corrective signaling.
Data Source
AI summary
A group-based control method and a group-based control apparatus for Machine Type Communication (MTC) devices in a mobile communication system are provided. The method includes sending, when an attach request from an MTC device is received by a Mobility Management Entity (MME), an attach report to a Home Subscriber Server (HSS), starting, upon reception of the attach report by the HSS, a timer lasting for a preset time duration, counting the number of MTC devices requesting attachment and the number of already attached MTC devices during the preset time duration, determining, upon expiration of the timer, by the HSS, an Access Point Name-Aggregate Maximum Bit Rate (APN-AMBR) in consideration of a sum of the counted number of MTC devices requesting attachment during the preset time duration and the counted number of already attached MTC devices, and sending, by the HSS, the determined APN-ABMR to the MME.