Footprint and Capabilities (FCI) API

Project Status:

(roll over for info)


The project has been completed.


September 1, 2021

Estimated Completion:

December 31, 2023
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Problem Statement

The Capacity API is intended to allow participants in the federated video delivery service to communicate availability and capacity information as needed. The design is meant to encompass multiple use cases, including one content provider to many CDNs/ISPs as well as more complex multiparty interactions, all while preserving the flexibility and business models of the underlying providers.

Project Description

Video delivery is a complex ecosystem of content and network providers. The content providers rely on one or more network providers (ISPs and global or regional CDNs) to connect them to their users, and at high quality levels. One of the constraints to providing a high quality experience is network capacity constraints due to high demand or temporary infrastructure failures. Historically, it has been challenging to provide the necessary data at the right level of detail: Too little, the content provider can’t make traffic routing decisions. Too much, the CDN or ISP doesn’t have the flexibility needed to manage their network effectively. Often times, sharing this information has been ad hoc, making it challenging to reuse with multiple partners. This document will be two parts: the introduction and description of the API and the data model. The data model is itself composed into two parts: the basic DCI data model objects description and the SVTA extended data model objects list. One thing to note about the latter is that only the objects are listed. The description and usage are detailed in the respective interface document.

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Published Documents

Version: 1.1

Date Plublished: 10/13/2023

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SVTA2045: Open Caching API Footprint and Capabilities

This document describes the Application Programming Interface (API) methods and data model related to the Footprint and Capabilities Interface. The API has been entirely designed by the SVTA Open Caching group whereas the data model is based on the IETF Content Delivery Network Interconnection (CDNi) work. and on extensions specified by the SVTA Open Caching group.

Goals and Objectives

The goal of this project is to publish the Footprint and Capabilities API specification document, which will extend the functionality of the existing Capacity Footprint API with a number of additional features.

Project Scope

The API specification produced by this project will PROVIDE:
  • A list of additional API features to meet the specific needs detailed in the problem statement
  • Description of API methods by which to provide the functionality of the newly included features
The API specification will NOT PROVIDE:
  • Any specific programming languages that should be used to carry out the API functionality
  • Any support for features not specifically listed and addressed by methods within the API


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