P-CSCF Error Message Adaptation for Network Registration
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Solution Overview
Problem
Conventional mobile communication networks send stringent error messages for non-positive registration results, leading to unauthorized networks being blacklisted by user equipment, resulting in decreased usage and performance, especially on higher-quality networks like 4G and 5G, due to erroneous connection refusals during outages or internal errors.
Innovation Solution
Implementing a Proxy Call Session Control Function (P-CSCF) to replace stringent error messages with lenient cause messages, allowing user equipment to reconnect to networks experiencing outages or errors, thereby maintaining network usage and performance by differentiating between unauthorized access and network outages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stringent error messages are sent for non-positive registration results, then network security is improved by identifying unauthorized devices, but network usage decreases as authorized devices blacklist the network due to erroneous refusals during outages
Solution Approach 1:
The patent changes the parameter of error message stringency by introducing a conditional mechanism that selects between stringent and lenient error messages based on network operational status. When the network is operational, stringent error messages are sent to identify unauthorized devices. When network outages or errors are detected, lenient error messages are sent to prevent authorized devices from blacklisting the network, thus resolving the contradiction between security and usage.
Solution Approach 2:
The patent introduces an intermediary mechanism (the P-CSCF or network node) that mediates between the network's security requirements and the user equipment's connection attempts. This intermediary detects network operational status and selectively modifies error messages accordingly, acting as a buffer that prevents erroneous connection refusals from reaching authorized devices during outages while maintaining security during normal operation.
2Measurement precision
If stringent error messages are sent during network outages, then error detection is improved, but user experience deteriorates due to permanent rejection and blacklisting
Solution Approach 1:
The patent dynamically changes the error message parameter based on network operational status. During network outages or errors, the system transitions from sending stringent error messages (which cause blacklisting) to sending lenient error messages (which allow reconnection attempts). This parameter change maintains error detection capabilities while preventing user experience deterioration by adapting the error response to current network conditions.
3Quantity of substance
If network resources are allocated to support growing demand from new devices and applications, then network capacity increases, but network efficiency decreases due to erroneous connection refusals and blacklisting
Solution Approach 1:
The patent converts the harmful effect of error messages into a beneficial outcome by introducing conditional logic. Instead of always sending error messages that cause blacklisting (harm), the system now sends lenient error messages during outages (benefit), transforming what was previously a harmful uniform response into a beneficial adaptive response that maintains network efficiency while supporting growing capacity.
Data Source
AI summary
Systems and methods for dynamically controlling network registrations are disclosed. The method includes replacing a stringent error message with a lenient cause message in responding to a registration request from a user equipment.