S-CSCF Server Registration Queue Segmentation
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Solution Overview
Problem
IMS network registration management is complicated by mobile terminals' mobility, leading to automatic re-registration issues, which can result in rejection of home gateways and other registered terminals, and generates additional load and security weaknesses in the network.
Innovation Solution
Implementing independent registration queues with distinct policies for different types of terminals, allowing for personalized configuration and management of registration durations and policies based on discriminating parameters, such as terminal type or network address, to avoid rejection and maintain service availability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If mobile terminals re-register automatically when leaving and re-entering Wifi zone, then terminal mobility is supported, but home gateway and other registered terminals are rejected due to FIFO policy
Solution Approach 1:
The patent segments the registration management system into multiple independent queues (first queue for home gateway, second queue for SIP terminals). This segmentation allows mobile terminals to re-register without affecting the home gateway's registration status, as each queue operates independently with its own policy. The discriminating parameter (e.g., terminal type, network address) is used to route registrations to the appropriate queue.
2Device complexity
If maximum number of terminals with same IMPU is limited, then registration control is achieved, but service availability is reduced when maximum is reached
Solution Approach 1:
By dividing terminals into different queues based on their type and priority, the system can apply different registration limits and policies to each queue. The home gateway queue can maintain a guaranteed registration slot, while other terminals share the remaining capacity. This ensures service availability for critical terminals even when the overall maximum is reached.
Solution Approach 2:
Different registration policies and limits are applied locally to different queues. The home gateway queue may have a higher priority or guaranteed slot, while other terminal queues have standard limits. This local differentiation allows the system to maintain service availability for critical services while controlling overall registration numbers.
3Reliability
If centralized registration management is implemented, then registration policy enforcement is achieved, but network load and processing complexity increase
Solution Approach 1:
The S-CSCF server pre-configures multiple registration queues with their respective policies, limits, and discriminating parameters. This preliminary setup allows the server to make rapid routing decisions without complex real-time analysis, reducing processing load while maintaining policy enforcement. The queues are prepared in advance with all necessary parameters defined.
Data Source
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Figure 2
AI summary
The invention relates to a method for managing records in an IMS network, comprising: a step (E5) of creating, for a given public identity, at least two record files, each being associated with a recording policy; a step (E10) of receiving a record message transmitted by a terminal having said public identity; and a step (E70) of assigning one of said record files to said terminal on the basis of a field included in said message.