Transparent Network Devices for Unidirectional Traffic Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Transparent WAN optimization devices face challenges in automatically establishing inner connections across wide-area networks, particularly with unidirectional network protocols like UDP, where there is no return traffic to detect each other's presence and exchange information.
Innovation Solution
Transparent network devices intercept unidirectional network traffic and use bidirectional protocol messages to discover each other, sending connection request messages with indicators to establish inner connections, even in the presence of middle devices that may interfere with communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If transparent WAN optimization devices operate transparently to intercept unidirectional network traffic, then network traffic optimization is achieved, but automatic discovery and connection establishment between devices becomes impossible due to lack of return traffic
Solution Approach 1:
Instead of relying on return traffic to establish connections (traditional bidirectional approach), the patent inverts the approach by using unidirectional connection request messages that travel in the same direction as the optimized traffic. The downstream device sends connection requests upstream, and upstream devices respond by accepting or rejecting these requests, enabling automatic connection establishment without requiring return traffic on the optimized path.
Solution Approach 2:
The patent introduces connection request messages as an intermediary mechanism to facilitate communication between transparent WAN optimization devices. These messages act as mediators that carry connection establishment information in the forward direction, allowing devices to discover and connect to each other despite the unidirectional nature of the optimized traffic flow.
2Extent of automation
If transparent WAN optimization devices add flags or indicators to bidirectional network traffic, then device discovery and connection establishment is enabled, but this approach cannot be applied to unidirectional protocols like UDP
Solution Approach 1:
The patent creates a universal connection establishment mechanism that works across both bidirectional and unidirectional protocols. By using connection request messages that can be embedded in or accompany unidirectional traffic, the system achieves protocol-agnostic device discovery and connection establishment, making the transparent WAN optimization applicable to a broader range of network protocols including UDP.
3Reliability
If manual configuration is used to establish inner connections between WAN optimization devices, then connection reliability is improved, but device complexity and operational difficulty increase
Solution Approach 1:
The patent enables WAN optimization devices to automatically perform connection establishment and device discovery without requiring manual configuration. Devices autonomously send connection requests, process responses, and establish inner connections on their own, eliminating the need for administrators to manually configure connection parameters while maintaining reliable connections through the automated protocol.
Data Source
AI summary
Transparent network devices intercept unidirectional network traffic and use bidirectional network protocol messages to discover each other and configure an inner connection. A first transparent network device intercepting unidirectional network traffic between a source and destination will send a bidirectional network protocol message addressed to the destination that includes an indicator of its presence. Additional transparent network devices that intercept this network message each add their own indicator to the message. If no response to the bidirectional network message is received, an error message is received, or a response message is received directly from the destination by one of the transparent network devices, this additional transparent network device deduces that it is the closest transparent network device to the destination and sends a response message addressed to the source that includes an indicator of its presence. The first transparent network device receives the response message and establishes an inner connection.