Virtual Socket Encapsulation for TCP Load Balancing and Failover

The patent introduces a virtual socket as an intermediary layer between the application and multiple physical TCP sockets. This virtual socket manages the distribution of packets across multiple underlying TCP sockets, providing load balancing and failover capabilities while maintaining a simple single-socket interface for applications. The virtual socket acts as a mediator that handles the complexity of managing multiple TCP connections internally while presenting a unified interface externally.

The virtual socket implementation dynamically monitors the load status of multiple underlying TCP sockets and adaptively distributes packets to optimize throughput. The system continuously adjusts packet routing based on real-time socket conditions, dynamically selecting the most appropriate socket for each packet to maintain optimal load distribution and prevent congestion while maximizing network throughput.

The virtual socket implements local quality differentiation by maintaining a simple unified interface at the application level while incorporating multiple specialized TCP sockets at the transport layer. Each underlying TCP socket can be optimized for specific purposes (e.g., different network interfaces, load characteristics), allowing the system to achieve fault tolerance through diversity while presenting a consistent simple interface to applications.

The virtual socket architecture segments the packet handling process into distinct thread-safe components: a main thread manages socket selection and packet distribution, while worker threads handle individual TCP socket operations. Each TCP socket has its dedicated queue and handling thread, isolating potential race conditions and making thread-safety management more tractable while maintaining high throughput through parallel processing.