Cell Barring in Cellular Networks
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Solution Overview
Problem
Current cellular network access control methods, such as Access Class Barring, are inadequate for managing varying traffic and application characteristics, particularly in overload situations, as they lack fine-grained control and do not differentiate between user equipment and services, leading to inefficient resource allocation and potential service disruptions.
Innovation Solution
A method that transmits barring factor and scaling information to user equipment, allowing for individualized access control based on user-specific or group-specific rules, enabling finer control over access permissions and barring times, even in connected or idle modes, and distinguishing between different services and service classes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If Access Class Barring is used to block random access attempts, then access control in overload situations is achieved, but fine-grained control over different services and user profiles is lost
Solution Approach 1:
The patent segments the access control mechanism by introducing service-specific access barring parameters (ac-BarringForMO-Data, ac-BarringForMO-Signalling) and user profile-specific parameters (ac-BarringPerUser, ac-BarringPerApplication). This allows different services and user groups to have customized access control policies rather than a single blanket barring mechanism, thereby achieving fine-grained control while maintaining manageable system complexity through structured parameter organization.
Solution Approach 2:
The patent applies local quality by allowing different access barring characteristics to be assigned to different services, user profiles, and applications. Each service type (data, signalling, emergency) and user category (priority levels, subscription types) can have its own tailored barring parameters, enabling localized optimization of access control for specific network conditions and service requirements without affecting other services uniformly.
2Ease of operation
If equal distribution of Access Classes is used, then simple implementation is achieved, but differentiated access control for different user profiles and applications is impossible
Solution Approach 1:
The patent extends the traditional Access Class concept by making it multi-functional. The same Access Class framework is reused but enhanced with additional dimensions: service type (data, signalling, emergency), user profile (priority levels), and application type. This universal extension allows the basic Access Class mechanism to serve multiple differentiation purposes simultaneously, maintaining ease of operation while dramatically increasing adaptability for diverse service and user requirements.
Solution Approach 2:
The patent adds new dimensions to the Access Class system beyond the traditional single dimension of user grouping. It introduces service type as one dimension, user profile priority as another, and application type as a third dimension. This multi-dimensional approach allows the system to differentiate access control across multiple axes simultaneously, transforming a simple flat Access Class assignment into a sophisticated multi-criteria access control framework.
3Productivity
If Access Barring Factor with random blocking is used, then coarse-grained access control is achieved, but precise control over access probability for specific services is lost
Solution Approach 1:
The patent changes the parameters controlling access probability from a single coarse-grained Access Barring Factor to multiple service-specific and user-specific parameters. Each service type (MO-Data, MO-Signalling, Emergency) has its own barring factor, and each user profile can have additional scaling factors. This parameter multiplication allows precise control over access probability for different services and user groups, enabling the network to optimize access efficiency for critical services while restricting non-critical ones, thereby achieving both high productivity and precise control.
Data Source
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AI summary
The present invention relates to a method and a program for selective access control to shared resources in a cellular mobile network. It enables the protection of the network in case of overload situations and is applicable to any cellular mobile network like, GERAN, UTRAN, LTE / E-UTRAN, LTE-Advanced, cdma2000, WiMAX, WiBro etc, wherein on a per connection or preferably on a per application or subscription base the access toward a shared medium can be controlled by the operator in order to handle high load or overload situation, while maintaining service operation. The basic principle of the present invention is the configuration of individual access barring scaling factors and or access barring time scaling factors or individual access barring times on a per terminal basis in order to differentiate terminals or service classes or applications during access to a shared medium.