Primary Network Device VoIP State Synchronization
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Solution Overview
Problem
In clustered network environments, maintaining synchronized state information for voice-over-internet-protocol (VoIP) calls across multiple network devices is challenging due to latency, which can lead to packet drops and security compromises, especially in load-balanced setups where multiple devices handle data packets.
Innovation Solution
A primary network device within the cluster is identified to manage and synchronize state information for VoIP communications using application-layer functionality, ensuring that state data is consistently updated and forwarded to other devices, allowing for seamless failover in case of device failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple network devices handle data packets in a load-balanced cluster, then device utilization and load distribution are improved, but state information synchronization latency increases and packet drop risk worsens
Solution Approach 1:
The patent segments the cluster into a primary network device that maintains call state information and secondary network devices that handle packet forwarding. This segmentation allows load distribution while maintaining a single source of truth for state information, resolving the contradiction between device utilization and synchronization reliability.
Solution Approach 2:
The primary network device acts as an intermediary that mediates between secondary devices and the call state information. Secondary devices forward packets to the primary device, which maintains the state and ensures proper handling. This intermediary role eliminates the need for complex multi-device state synchronization while maintaining high device utilization.
2Reliability
If state information is synchronized across all cluster devices, then call security is improved, but communication latency and processing overhead worsen
Solution Approach 1:
The patent extracts the call state information maintenance function from the general packet handling function. Only the primary network device maintains call state information, while secondary devices focus on packet forwarding. This extraction eliminates the need for continuous state synchronization across all devices, reducing latency while maintaining security through the primary device's centralized state management.
3Stability of the object's composition
If a single primary device manages all call state, then state information consistency is improved, but single point of failure risk worsens
Solution Approach 1:
The patent implements dynamic failover capability where the primary network device role can be transferred to a secondary device if the primary fails. This dynamic adaptation maintains state information consistency by ensuring only one active primary device at a time, while providing failover versatility through the ability to designate new primary devices from the secondary pool.
Data Source
AI summary
This disclosure relates to managing voice-based data communications within a clustered network environment using application-layer functionality, and more particularly to a primary network device within a cluster that manages transmissions related to a communication and synchronizes state information associated with the communication to other network devices within the cluster. One exemplary method includes receiving, by a network device in a cluster, information associated with a data communication between a first user device and a second user device, and analyzing, by the network device, the received information using application-layer functionality to identify a primary network device that manages the data communication. When the network device is not the primary network device, the network device forwards the received information to the primary network device. Upon receipt of the information, the primary network device provides updated state information for the communication with other network devices within the cluster for synchronization purposes.