ASN-GW Binding Status Signaling via HA Intermediary
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Solution Overview
Problem
In WiMAX networks supporting CMIPv6, the Access Service Network Gateway (ASN-GW) lacks awareness of the Binding Update (BU) and Binding Acknowledgement (BA) status, requiring passive parsing of U-Plane messages, which is inefficient and resource-intensive.
Innovation Solution
A new signalling mechanism is introduced between the Access Service Network (ASN) and the Connectivity Service Network (CSN) to inform the ASN-GW of the BU/BA status through specific messages, utilizing the Authentication, Authorization, and Accounting (AAA) function to relay information, thereby avoiding the need for ASN-GW packet inspection in the U-Plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If ASN-GW performs passive parsing of U-Plane messages to gain awareness of BU/BA status, then the ASN-GW can become aware of binding status, but the device complexity and resource consumption increase significantly
Solution Approach 1:
The patent introduces an intermediary signaling mechanism where the HA sends binding status information to the ASN-GW through controlled message forwarding. Instead of the ASN-GW actively parsing U-Plane messages, the HA acts as an intermediary that provides the binding status information through a dedicated signaling path, thereby reducing the complexity of packet inspection while maintaining awareness of binding status.
2Loss of information
If ASN-GW performs passive parsing of each U-Plane message, then the ASN-GW can monitor BU/BA status, but the processing time and resource consumption increase
Solution Approach 1:
The patent extracts the binding status information from the U-Plane message stream and delivers it through a separate signaling channel. The ASN-GW receives binding status notifications directly from the HA through control plane signaling, eliminating the need to parse each U-Plane message in real-time, thus reducing processing time and resource consumption while maintaining continuous awareness of binding status.
3Reliability
If ASN-GW performs passive parsing to detect binding status, then complete monitoring is achieved, but the network efficiency decreases due to resource-intensive operations
Solution Approach 1:
The HA serves as an intermediary that consolidates binding status information and delivers it to the ASN-GW through efficient signaling mechanisms. This approach maintains reliable monitoring of binding status while improving network processing efficiency by eliminating redundant packet inspection operations at the ASN-GW.
Solution Approach 2:
The patent establishes a feedback mechanism where the HA proactively notifies the ASN-GW of binding status changes. This feedback loop ensures reliable monitoring of binding status without requiring continuous passive parsing, thereby maintaining network efficiency while achieving complete monitoring reliability.
Data Source
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AI summary
A method is proposed, for use e.g. in the context of WiMAX networks supporting the CMIPv6 function, for allowing the ASN-GW (208) to become aware of the status of a control procedure, the CMIPv6 mobility binding procedure. The ASN-GW (208) is not directly aware of its result since the procedure implies a message exchange (3000, 3002) at the U-Plane level, where the ASN-GW (208) implements only a routing function. Nevertheless the ASN-GW (208) needs to know the status of the procedure since it has to perform some subsequent actions depending on that status. The method includes signalling the status via a signalling mechanism (3004) between the Access Service Network (102, 208) and the Connectivity Service Network (114, 206), thus avoiding packet inspection at the U-plane by the Access Service Network Gateway (208).