Inverse SSAC Bypass for VoIP Access Control
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Solution Overview
Problem
Existing access barring mechanisms in wireless communication systems do not provide a consistent way to differentiate between normal data access and voice over internet protocol (VOIP) calls, leading to unnecessary barring of VOIP calls while allowing regular data transmission, which complicates network management and quality of service.
Innovation Solution
The introduction of an Inverse Service Specific Access Control (SSAC) procedure that allows wireless communication devices to bypass Access Class Barring (ACB) tests when service specific access control is enabled, using a Boolean variable to manage this bypass and set a timer for ACB bypass, ensuring that VOIP calls are prioritized and regular data access is barred during network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Access Class Barring (ACB) mechanism is applied to control network load, then network congestion is controlled, but VOIP calls are unnecessarily barred along with regular data access
Solution Approach 1:
The patent segments the access control mechanism into two distinct layers: ACB for general data access control and SSAC for VOIP-specific access control. This segmentation allows independent control of different traffic types, enabling VOIP calls to bypass ACB restrictions while regular data access remains controlled, thus resolving the contradiction between network load control and VOIP call reliability
Solution Approach 2:
The patent inverts the traditional access control logic by making SSAC the primary control mechanism for VOIP calls and using ACB only as a fallback. Instead of applying ACB to all access types and then making exceptions for VOIP, the system applies SSAC specifically to VOIP traffic and only applies ACB when SSAC is not configured, thereby prioritizing VOIP access while maintaining overall network control
2Reliability
If Service Specific Access Control (SSAC) is applied to allow VOIP calls, then VOIP access is improved, but complexity of access control mechanism increases
Solution Approach 1:
The patent implements a dynamic access control mechanism where the system adapts its behavior based on configuration. The ACB bypass logic is dynamically activated only when SSAC parameters are present, allowing the system to simplify to pure ACB mode when VOIP control is not needed, and switch to combined SSAC+ACB mode when VOIP priority access is required, thus managing complexity based on actual network requirements
Solution Approach 2:
The patent introduces an intermediary logic layer that mediates between SSAC and ACB mechanisms. This intermediary evaluates whether SSAC parameters are configured and determines the appropriate access control path, preventing direct conflict between the two mechanisms and simplifying the overall control flow by providing a clear decision hierarchy
3Device complexity
If ACB is applied to all access types, then network congestion control is simplified, but quality of service for VOIP calls deteriorates
Solution Approach 1:
The patent applies local quality by configuring SSAC parameters specifically for VOIP traffic while leaving ACB parameters for general data access. This localized application of control mechanisms allows differentiated quality of service: VOIP calls receive priority treatment through SSAC bypass logic while regular data traffic continues to be controlled by ACB, thereby improving VOIP QoS without complicating overall network control
Data Source
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AI summary
According to some embodiments, a wireless communication device is operable to perform a process for initiating a session with a radio network node. As a part of the process, the wireless communication device is operable to determine that the radio network node has enabled an access class barring test, determine whether to perform or bypass the access class barring test for the session, and perform or bypass the access class barring test according to the determination.