IMS Call Setup Wildcard Identifier Matching

Solution Overview

Problem

In IP multimedia subsystem (IMS) networks, the processing required to match originating identifiers with wildcarded public user identities is extensive, leading to inefficiencies in call setup due to the need for multiple nodes to perform matching operations.

Innovation Solution

A method where a first node in the IMS network verifies if an originating identifier is associated with a wildcard identifier and forwards this information to further nodes, eliminating the need for them to perform matching operations by including the wildcarded identifier in the signalling message, thereby improving signalling efficiency during call setup.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple nodes perform matching operations on originating identifiers with wildcarded public user identities, then call setup can be completed with standard procedures, but signalling efficiency deteriorates due to extensive processing requirements

Engineering Contradiction:

Improvecall setup completionVSAvoidsignalling efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The first node performs the matching operation between the originating identifier and wildcarded public user identities in advance, before forwarding the call setup request to further nodes. By completing the matching operation preliminarily, the patent eliminates the need for subsequent nodes to perform redundant matching, thus improving signalling efficiency while ensuring reliable call setup completion

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts the matching operation from the standard call setup procedure performed by multiple nodes, and concentrates it in a specific first node. By taking out this processing task from the distributed node operations, the patent reduces the overall processing load across the network while maintaining the necessary call setup functionality

Inventive Principle:

Principle #2Taking out (Extraction)

2Measurement precision

If all nodes perform matching operations on originating identifiers, then wildcarded identifier identification can be achieved, but processing load on network nodes increases

Engineering Contradiction:

Improvewildcarded identifier identificationVSAvoidprocessing load

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The first node performs the matching operation between the originating identifier and wildcarded public user identities in advance, before forwarding the call setup request to further nodes. By completing the matching operation preliminarily, the patent eliminates the need for subsequent nodes to perform redundant matching, thus improving signalling efficiency while ensuring reliable call setup completion

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent extracts the matching operation from the standard call setup procedure performed by multiple nodes, and concentrates it in a specific first node. By taking out this processing task from the distributed node operations, the patent reduces the overall processing load across the network while maintaining the necessary call setup functionality

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS8654770B2Method of setting up a call in an internet protocol multimedia subsystem network

Publication Date: 2014.02.18 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The present invention is directed to a method of setting up a call from an originating user in an internet protocol (IP) multimedia subsystem (IMS) network. The originating user provides a signalling message containing an originating identifier of the user to a first node of the network. According to the method, a first node of the network receives the signalling message. The first node performs a verification on whether the originating identifier is associated with a wildcard identifier, wherein the wildcard identifier identifies a plurality of identifiers which are entitled to using a group service. If the originating identifier is associated with a wildcard identifier, the first node forwards the wildcard identifier and the originating identifier to a further node for setting up the call.