Terminal Access Control Using Feature-Based ACB Parameters
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Solution Overview
Problem
Current access control mechanisms in M2M communication, such as ACB, are limited in determining control parameters based solely on the Access Class of a terminal, leading to a single method of controlling network access, which can result in network overload when multiple MTC devices attempt to reconnect simultaneously.
Innovation Solution
A method where a terminal determines a target ACB control parameter using feature information like priority, service type, and core network information, allowing for more diverse and dynamic control of network access, including access probability and barring time, to manage network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If ACB control parameter is determined only according to Access Class of the terminal, then the access control mechanism is simple, but the diversity of determining ACB control parameter is limited and cannot effectively manage network congestion
Solution Approach 1:
The patent segments the access control mechanism into multiple independent determination methods. Instead of using a single ACB control parameter determined only by Access Class, the system divides the control into: (1) ACB control parameter determination based on Access Class, (2) EAB control parameter determination based on device type, and (3) Service-specific control parameter determination based on service characteristics. This segmentation allows each method to operate independently while contributing to the overall access control decision, thereby increasing diversity without creating a single complex monolithic system.
Solution Approach 2:
The patent adds multiple dimensions to the access control parameter determination process. Traditionally, only Access Class (one dimension) was used. The invention introduces additional dimensions including: device type (MTC device vs. non-MTC device), service type (voice service vs. data service), and priority level. This multi-dimensional approach enables more diverse and nuanced ACB control parameter determination, allowing the system to distinguish between different types of devices and services when determining access control parameters.
2Productivity
If multiple MTC devices simultaneously try to access the network after power restoration, then network connectivity is restored quickly, but the network enters an overloaded state
Solution Approach 1:
The patent applies preliminary action by having terminals determine their ACB control parameters in advance based on their Access Class and device type before actually attempting network access. The network side also pre-configures EAB parameters and service-specific control parameters. When power is restored and multiple MTC devices simultaneously attempt access, these pre-determined parameters are immediately applied without requiring real-time calculation, enabling quick access decisions that prevent network overload while maintaining fast connectivity restoration.
Solution Approach 2:
The patent implements feedback mechanisms where the network monitors the actual access status and load conditions, and adjusts ACB control parameters accordingly. When network overload is detected, the system provides feedback by updating EAB parameters and service-specific control parameters, which are then used by terminals to make subsequent access decisions. This feedback loop enables the network to dynamically respond to overload conditions while maintaining fast access restoration through optimized parameter determination.
Data Source
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AI summary
The application discloses an access method and a terminal. The method comprises: a terminal determining target access class barring (ACB) policy control parameters according to target feature information, wherein the target feature information comprises at least one of the following: a priority of the terminal, service information of a service having data to be transmitted, and core network information of a core network providing the service having the data to be transmitted; and the terminal accessing a network device according to the target ACB control parameters. In the embodiment of the present application, target ACB control parameters of a terminal are determined according to target feature information; for example, the target ACB control parameters are determined according to any one of a priority of the terminal, service information of a service having data to be transmitted, and core network information of a core network providing the service having the data to be transmitted, thereby improving the diversity of methods for determining the ACB control parameters for a terminal to access a network in an ACB mechanism.