Overview

TR-069 is a technical specification that defines an application layer protocol for remote management of end-user devices. It was published by the Broadband Forum and was entitled CPE WAN Management Protocol (CWMP). It provides the communication between CPE and Auto Configuration Servers (ACS). An ACS can manage a device, trouble shoot, configure, upgrade etc. TR-69 uses common web protocols such as HTTP, TCP-IP, SOAP, XML-RPCs to exchange information.

Setup

Since the Client is non-addressable from the public network, tr-069 and STUN creates and maintains a lightweight connection between the tr-069 server and agent to allow for tr-069-server initiated commands to be sent to the Client in real-time.

Sample message flow

The CPE is responsible for establishing the session to the server. The CPE keeps sending HTTP POST requests during the session. The session is closed as soon as both CPE & ACS  have indicated that they have nothing more to send (response or new RPC)

Implementation Details

The RDK tr69 client is developed by Dimark which has the following key features

• The Dimark TR-069 client is typically provided as ANSI C source code that runs on embedded Linux, with the API designed to ease the integration of the client into existing environments
• The client incorporates an abstraction layer that will speed implementation as well as make the addition of many new features, upgrades and updates virtual drop-ins.
• The client incorporates all updates that have resulted from more than eight years of field use, feature requests and customer deployments.