Origination and Destination Based Routing for Call Sessions

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Solution Overview

Problem

Telephony systems face inefficiencies in call routing, particularly during user re-homing within a carrier's network, leading to inadequate traffic distribution and resource management, which can result in costly and time-consuming infrastructure changes.

Innovation Solution

Implementing a two-phased query approach for call routing based on origination and destination information, using partitioned routing tables and indicators within the Session Initiation Protocol (SIP) to determine the next destination for call sessions, allowing for adaptable and customizable routing management.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If destination-based routing with load balancing is used for call traffic management, then traffic distribution is improved, but adaptability to user re-homing scenarios deteriorates

Engineering Contradiction:

Improvetraffic distribution efficiencyVSAvoidadaptability to user re-homing

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The routing system dynamically adapts between destination-based routing (for normal traffic distribution) and origination-based routing (for user re-homing scenarios). The system can switch routing modes based on the specific scenario, making it both efficient for traffic management and adaptable to migration events without requiring infrastructure changes.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If internal subscriber migrations occur within a carrier's network, then routing flexibility is improved, but impact on interconnections between carriers worsens

Engineering Contradiction:

Improverouting flexibilityVSAvoidimpact on interconnections

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The routing system segments the routing decision process into two distinct modes: destination-based routing for normal operations and origination-based routing for migration scenarios. This segmentation allows the system to handle internal subscriber migrations independently without affecting interconnections between carriers, as the migration traffic is routed through a different path that doesn't impact external carrier relationships.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If destination-based routing is used, then call routing simplicity is improved, but efficiency in user re-homing scenarios deteriorates

Engineering Contradiction:

Improverouting simplicityVSAvoidrouting efficiency in re-homing

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The system dynamically selects the routing mode based on the scenario. For normal calls, simple destination-based routing is used. For user re-homing scenarios, the system automatically switches to origination-based routing, which is more efficient for tracking migrated users. This dynamic approach maintains simplicity for the majority of cases while providing optimized routing when needed.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20230412949A1Origination and Destination Based Routing

Publication Date: 2023.12.21 COMCAST CABLE COMM LLC

AI summary

One or more aspects of the disclosure relate to various functions and processes related to routing of calls based on origination and/or destination information. In one aspect, a method may comprise receiving a request for a call session, and the request may include an indicator that may indicate whether to route a call based on origination and/or destination information of the call session. Based on the indicator, a routing element may determine whether the call session should be routed based on origination information and/or destination information.