Access Class Barring for Public Safety Network Prioritization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in shared broadband spectra used by public safety and commercial users, there is a challenge in determining the appropriate priority for network access, leading to potential congestion and delays for emergency responders when competing with other users for resources.
Innovation Solution
Implementing a Device Class Prioritization Control Function (DCP-CF) that receives a geographical location of an incident, determines the relevant access nodes, and adjusts Access Class Barring parameters to prioritize public safety users, ensuring they have preferential access to the network by automatically enabling system-wide access control and adjusting ACB parameters to favor public safety UEs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Access Class Barring parameters are used to control network access, then network congestion is mitigated, but public safety users experience delays and reduced priority during emergencies
Solution Approach 1:
The patent implements location-aware access control where ACB parameters are dynamically adjusted based on the user's geographical location and the type of incident detected. Public safety users in emergency zones receive preferential treatment while other users maintain normal barring, creating localized quality differences in access control
Solution Approach 2:
The system dynamically modifies ACB parameters in real-time based on incident detection and user classification. The barring factors and time values are not static but change according to the emergency situation and user device class, enabling adaptive access control that responds to changing conditions
2Device complexity
If random access control is implemented for all users, then network simplicity is maintained, but congestion occurs during emergencies when multiple users contend for resources
Solution Approach 1:
The patent changes the parameters of existing ACB mechanisms rather than introducing entirely new access control architecture. By modifying ac-BarringFactor, ac-BarringTime, and ac_BarringForSpecialAC parameters based on device class and location, the system manages congestion while maintaining compatibility with existing LTE access control frameworks
Solution Approach 2:
The system pre-configures public safety user devices with specific access classes (AC 12-14) and the network pre-loads incident location databases. When an emergency is detected, the system can immediately apply preferential access control without needing to establish new configurations during the crisis
Data Source
AI summary
A method and apparatus are provided for controlling network access in a wireless communication system. An infrastructure device, which may reside in, or be communicatively coupled to, any of an access network, a core network, and a service network, implements a device class prioritization control function (DCP-CF) that receives a geographical location of an incident, determines one or more of a cell and an access node corresponding to the geographical location, determines one or more access class barring parameters for the cell and/or access node, determines whether to enable access class barring at the cell and/or access node and, in response to determining to enable access class barring at the cell and/or access node, provides the one or more access class barring parameters to the cell and/or access node.