Two-Level Directory System for Proximity-Based Routing
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Solution Overview
Problem
Conventional communication routing systems in federated domains do not efficiently select a point of presence nearest the destination communication device, leading to inefficient routing of calls and communication links.
Innovation Solution
A two-level directory system is implemented, where a user directory provides location information for communication devices, which is then used to access a peer directory containing point of presence information, allowing for the selection of a point of presence based on proximity, cost, latency, or other factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional DNS lookup is used to route calls in federated domains, then routing information can be obtained, but the point of presence selected is not necessarily the nearest one to the destination device
Solution Approach 1:
The directory system is segmented into two levels: a user directory containing location information for communication devices, and a peer directory containing point of presence information for enterprises. This segmentation allows the system to first resolve user location and then select the nearest point of presence, improving routing precision without sacrificing efficiency
Solution Approach 2:
The federation broker acts as an intermediary that hosts both directories and performs the two-step lookup process. It mediates between the conventional DNS lookup and the point of presence selection, using location information from the user directory to efficiently select the nearest point of presence from the peer directory
2Device complexity
If a point of presence far from the destination device is selected, then routing can be simplified, but connection quality and latency are degraded
Solution Approach 1:
The system applies local quality by selecting a point of presence that is locally optimal (nearest to the destination device) rather than using a uniform routing approach. The user directory stores location information that enables this localized selection, improving connection quality and reducing latency while maintaining routing simplicity through the automated two-level lookup process
3Adaptability or versatility
If location information is not integrated into the DNS lookup process, then the existing system structure is maintained, but routing efficiency is reduced
Solution Approach 1:
The user directory pre-stores location information for communication devices, and the peer directory pre-stores point of presence information for enterprises. When a routing request is made, the federation broker performs a preliminary lookup in the user directory to obtain location information, then uses this information to efficiently select the nearest point of presence from the peer directory, reducing routing time while adapting the existing DNS lookup structure
Data Source
AI summary
Methods and systems for routing connections between federated enterprises are provided. More particularly, user location information is stored as part of a first directory accessible to a federation broker. Location information obtained in association with a requested connection is used by the federation broker to access a second directory containing the locations of points of presence within the enterprise that includes the target communication device.