Dynamic Serving Node Assignment in IMS Networks
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Solution Overview
Problem
Current load balancing and fault management schemes in IP-based Next Generation Networks, particularly in the 3GPP IMS architecture, are inadequate in addressing dynamic overload and fault situations, leading to performance degradation and potential network collapse due to rigid node assignments and complex registration processes, which are not suitable for unpredictable traffic patterns and services.
Innovation Solution
A method for dynamically assigning a serving network node based on actual signaling load and status information at the time of service requests, allowing for real-time load distribution and conditional assignment of S-CSCFs, decoupling nodes from rigid registration periods and enabling rapid response to load fluctuations and failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If rigid node assignment during registration is used, then network stability is maintained, but network reliability deteriorates under overload or failure conditions
Solution Approach 1:
The patent applies dynamics by transitioning from rigid static node assignment to dynamic node selection. The I-CSCF dynamically selects serving network nodes based on real-time load information and status, allowing the system to adapt to changing conditions such as overload or failures while maintaining stability through controlled reassignment mechanisms.
2Reliability
If registration-based load balancing is used, then node overload is addressed, but signaling traffic increases and response time deteriorates
Solution Approach 1:
The patent applies preliminary action by having the I-CSCF proactively collect and store load information about serving network nodes in advance. This pre-collected data is then used for rapid dynamic node selection during service requests, eliminating the need for time-consuming registration-based load balancing while maintaining effective overload prevention.
3Ease of operation
If complex registration process is used, then comprehensive node assignment is achieved, but system complexity increases and adaptability deteriorates
Solution Approach 1:
The patent applies the extraction principle by separating the node selection function from the complex registration process. The I-CSCF independently collects load information and makes dynamic node selection decisions based on real-time conditions, extracting the essential assignment logic from the cumbersome registration procedure and enabling simpler, more adaptable system operation.
Data Source
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AI summary
A method and a system for dynamic assignment of a serving network node in a communications network, preferably an IMS-based communications network, are described, wherein the communications network comprises a predetermined number of serving network nodes and wherein the method comprises: receiving a service request associated with a user equipment, another network or a network node, preferably an application server; providing load information associated with said serving network nodes; and, in response to said service request, assigning one of said predetermined number of serving network nodes to said user equipment, said other network or said network node on the basis of said load information.