Dynamic Access Class Barring in LTE Networks
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Solution Overview
Problem
LTE networks use a static barring factor to control access, which does not account for network traffic parameters, leading to unnecessary barring of mobile devices even when resources are available, and lacks priority access for special users or M2M devices.
Innovation Solution
A dynamically adjustable barring factor based on network traffic parameters is implemented, allowing mobile devices to set an upper limit for a randomly generated number, ensuring access for special users and M2M devices by continuously generating additional numbers until access is granted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a static barring factor is used to control network access, then network access control is simplified and easier to implement, but mobile devices are unnecessarily barred even when network resources are available, reducing network productivity
Solution Approach 1:
The patent transforms the static barring factor into a dynamic parameter that adjusts based on network traffic conditions. The base station determines the barring factor dynamically according to current network load, and mobile devices adapt their random number generation range accordingly. This dynamic adjustment allows the system to maintain simple access control logic while improving network access efficiency by reducing unnecessary barring when resources are available.
2Ease of operation
If a static barring factor is used, then the access control mechanism is easier to operate, but special users and M2M devices cannot obtain priority access, worsening service quality for important applications
Solution Approach 1:
The patent applies different access control characteristics to different user types while maintaining a unified operational framework. Special users and M2M devices are assigned specific access classes (e.g., classes 10-15) that receive preferential treatment through adjusted random number generation ranges, while regular users follow standard procedures. This local differentiation enables priority access for critical services without complicating the overall operation of the access control system.
3Productivity
If the barring factor is dynamically adjusted based on traffic parameters, then network access efficiency is improved and unnecessary barring is reduced, but the access control mechanism becomes more complex
Solution Approach 1:
The patent implements a self-adjusting access control mechanism where mobile devices automatically adapt to dynamic barring factors without requiring complex centralized control. Each device independently generates random numbers within dynamically adjusted ranges based on the received barring factor, and the system self-regulates access based on network conditions. This self-service approach improves network access efficiency while minimizing the complexity increase by distributing the adaptation logic to individual devices rather than requiring complex centralized management.
4Ease of manufacture
If regular random number generation is used without upper limit, then the mechanism is simpler to implement, but special users and M2M devices may be barred even when resources are available, reducing service reliability
Solution Approach 1:
The patent applies preliminary action by setting upper limits on random number generation ranges before the actual access attempt. For special users and M2M devices, the system pre-configures adjusted ranges that increase the probability of generating numbers below the barring factor, thereby ensuring priority access when network resources are available. This preliminary adjustment of the random number range is implemented seamlessly within the existing access control framework, maintaining implementation simplicity while improving access reliability for critical services.
Data Source
AI summary
Systems, methods, and computer-readable media for providing enhanced access class barring in LTE are provided. In embodiments, the method includes receiving, on a mobile device, a SIB2 message. A barring factor associated with the SIB2 message is identified. In embodiments, the barring factor is dynamic based on traffic parameters associated with a network. An upper limit for a random number is set on the mobile device and the random number is generated. The random number is generated and compared to the barring factor. If the random number is less than the barring factor, access to the network is provided to the mobile device. In embodiments, an additional random number is generated for special users or devices if the random number is greater than or equal to the barring factor.