MTC Device MMTEL Service Access Barring Skip Mechanism
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Solution Overview
Problem
The integration of machine type communication (MTC) devices in mobile networks leads to network congestion, exacerbated by the technical ambiguity in applying extended access barring (EAB) and access class barring (ACB) mechanisms, which can result in multimedia telephony (MMTEL) services being barred or disrupted.
Innovation Solution
A method is proposed where MTC devices skip EAB checking and apply EAB selectively, based on special call types and ACB skip information, to ensure uninterrupted MMTEL services during network congestion by prioritizing MMTEL services and configuring low priority and EAB settings appropriately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If extended access barring (EAB) is applied to MTC devices to manage network congestion, then network congestion is reduced, but MMTEL services are barred or disrupted
Solution Approach 1:
The patent applies different access barring rules to different service types. MMTEL services are granted special treatment with ACB skip information that allows them to bypass EAB checking, while other MTC services continue to be subject to EAB. This local differentiation resolves the contradiction by allowing congestion management for general MTC traffic while ensuring MMTEL service reliability.
Solution Approach 2:
The patent segments the access barring mechanism into two parts: EAB checking for general MTC services and a special ACB skip mechanism for MMTEL services. By setting the ACB skip information to 'true' for MMTEL call types, the system creates distinct access paths that allow MMTEL services to avoid EAB barring while other services remain constrained, thus resolving the contradiction between congestion management and service reliability.
2Productivity
If EAB checking is performed for all MTC services, then network congestion is controlled, but service quality for MMTEL is degraded
Solution Approach 1:
The patent implements local quality by applying different quality levels to different service types within the same access barring framework. MMTEL services receive high-quality treatment through ACB skip information that exempts them from EAB checking, while other MTC services receive standard congestion control. This resolves the contradiction by maintaining congestion control efficiency for bulk traffic while ensuring high service quality for MMTEL.
3Device complexity
If ACB skip information is not provided for MMTEL services, then EAB mechanism is simplified, but MMTEL services may be barred during congestion
Solution Approach 1:
The patent applies preliminary action by pre-configuring ACB skip information in the network for MMTEL services before congestion occurs. This information is stored and automatically applied when MMTEL services attempt to access the network, ensuring they bypass EAB checking without requiring real-time decision-making. This resolves the contradiction by maintaining simple barring mechanisms while ensuring MMTEL reliability through pre-established exemptions.
Data Source
AI summary
One disclosure of the present specification provides a method for performing a multimedia telephony (MMTEL) service in a machine type communication (MTC) device. The method can comprise the steps of: receiving, from an upper layer, an indication in which a mobile orienting (MO) MMTEL service is initiated; setting a special call type for the MMTEL service in a call type field within a request message for performing the MMTEL service; and transmitting the request message to a lower layer, wherein, when the request message is transmitted to the lower layer, if the MMTEL service is initiated, the MTC device does not transmit an extended access barring (EAB) application indication to the lower layer or can transmit, to the lower layer, an indication commanding the EAB to be skipped, even if the EAB is set.