TURN Server Bandwidth Control in NAT Relay Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Modern packet-based communication protocols, such as WebRTC and SIP, face challenges in controlling bandwidth within NAT environments, as TURN servers do not perform flow-control on packets, leading to potential bandwidth bottlenecks and quality of service issues.
Innovation Solution
Implementing a method to identify endpoints within a NAT system, determine bandwidth limitations based on quality of service requirements and available bandwidth, and establish a relay path with these limitations using a TURN server to manage communication sessions effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a TURN server opens a relay for all communication packets to bypass firewall blocking, then communication reliability is improved, but bandwidth control capability deteriorates (no flow-control is performed)
Solution Approach 1:
The patent applies parameter changes by modifying the TURN server to accept and process bandwidth limitation parameters during relay allocation. The server now receives bandwidth limitation values from endpoints and enforces these parameters on the relay paths, transforming the server from a simple relay opener to an active bandwidth controller that adjusts network flow parameters dynamically
Solution Approach 2:
The patent implements feedback mechanisms where the TURN server monitors actual bandwidth consumption through packet counting and compares it against the allocated bandwidth limitations. When bandwidth thresholds are approached or exceeded, the server can notify endpoints or adjust relay behavior, creating a closed-loop control system that maintains bandwidth compliance while ensuring communication reliability
2Reliability
If bandwidth limitation is enforced on relay paths, then quality of service is improved, but device complexity increases (TURN server must manage bandwidth control)
Solution Approach 1:
The patent applies preliminary action by establishing bandwidth limitations at the moment of relay allocation, before actual media traffic flows. The TURN server receives bandwidth limitation parameters during the allocation request phase, configures the relay path with these constraints upfront, and prevents bandwidth violations before they occur, rather than needing complex real-time intervention mechanisms
Solution Approach 2:
The patent implements self-service by enabling endpoints to declare their own bandwidth requirements and capabilities. Endpoints provide bandwidth limitation information to the TURN server during allocation requests, allowing them to self-manage their bandwidth consumption patterns without requiring the server to actively monitor and control each stream, thus reducing server complexity while maintaining QoS
Data Source
AI summary
Embodiments disclosed herein provide systems and methods for controlling bandwidth across a network address translation (NAT) system. In a particular embodiment a method provides, identifying a first endpoint and a second endpoint to a communication session. The first endpoint is located within a domain of the NAT system and the second endpoint is located outside to the domain. The method further provides determining a bandwidth limitation for the communication session and exchanging communications between the first and second endpoints in accordance with the bandwidth limitation.