TFTP-to-HTTPS Proxy Caching for DOCSIS Firmware Delivery
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Solution Overview
Problem
The deployment and management of network services face challenges in delivering DOCSIS configuration files and CPE firmware using the Trivial File Transfer Protocol (TFTP), including suboptimal throughput, latency, and limited security, which result in prolonged firmware delivery times and increased MTTR during troubleshooting.
Innovation Solution
Implementing a TFTP-to-HTTPS proxy service that translates TFTP requests into HTTPS queries, allowing secure and efficient delivery of configuration files and firmware updates by caching frequently requested items, segmenting data packets, and ensuring seamless communication between backend servers and CPE devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TFTP protocol is used for delivering configuration files and firmware, then compatibility with existing CPE devices is maintained, but throughput and security are suboptimal
Solution Approach 1:
The patent introduces a TFTP-to-HTTPS proxy service as an intermediary component between CPE devices and the backend server. The proxy receives TFTP requests from CPE devices, translates them into HTTPS requests, retrieves files from the backend server via HTTPS, and returns them to CPE devices. This intermediary enables modern HTTPS protocol benefits (security, throughput) while maintaining compatibility with legacy TFTP-based CPE devices that cannot natively speak HTTPS.
2Loss of time
If TFTP protocol is used for firmware delivery, then existing CPE devices can receive updates, but delivery time and latency are prolonged
Solution Approach 1:
The TFTP-to-HTTPS proxy service acts as a protocol translator that enables fast HTTPS transfers while maintaining TFTP compatibility. The proxy establishes efficient HTTPS connections to the backend server for rapid file retrieval, then delivers files to CPE devices through TFTP. This intermediary approach eliminates the speed limitations of direct TFTP transfers by leveraging HTTPS performance for the server-to-proxy segment.
3Ease of repair
If TFTP protocol is used for configuration file delivery, then CPE devices can obtain settings, but MTTR during troubleshooting increases
Solution Approach 1:
The proxy service simplifies troubleshooting by providing a single point of control and visibility. Network operators can troubleshoot issues at the proxy level rather than dealing with complex TFTP operations across multiple devices. The proxy logs and monitoring capabilities enable faster identification of problems, reducing MTTR while maintaining TFTP compatibility for configuration file delivery.
Data Source
AI summary
Systems, methods, and devices for delivering configuration files and firmware updates to Customer Premises Equipment (CPE) using a Trivial File Transfer Protocol (TFTP) to Hypertext Transfer Protocol Secure (HTTPS) proxy service are disclosed. Embodiment methods may include the TFTP-to-HTTPS proxy service listening on a User Datagram Protocol (UDP) port for incoming TFTP requests, receiving a TFTP request from a CPE device, translating the TFTP request into an HTTPS request, sending the translated HTTPS request to a backend server, receiving an HTTPS response, translating the HTTPS response into a TFTP response, and sending the TFTP data packets to the CPE device. Some embodiments may include storing the translated file in the cache, checking the cache for a requested file before requesting the file from the backend server, and sending the cached file to the requesting CPE device when it is stored in the cache.