Routing Switch Direct Memory Access Cross-Node Latency

The patent introduces a routing switch as an intermediary device that enables direct peer-to-peer communication between network nodes. The routing switch includes protocol conversion interfaces that convert between network protocols (for external communication) and a fast bus protocol (for internal high-speed communication). This mediator architecture allows nodes to maintain scalability through standard network protocols while achieving high-speed direct access through the routing switch's fast bus link, resolving the contradiction between scalability and access speed.

The patent segments the communication path into two distinct parts: the external network interface using standard protocols for compatibility, and the internal fast bus link using a dedicated high-speed protocol for low-latency communication. The routing switch performs protocol conversion at its interfaces, separating the concerns of protocol compatibility (handled at the interface level) from speed optimization (handled at the internal bus level). This segmentation allows the system to maintain protocol compatibility while eliminating proxy-mediated delays through direct fast bus communication.

The routing switch is designed as a multi-functional device that simultaneously performs protocol conversion, routing, and direct memory access operations. The fast bus link is configured to support both general data transmission and direct memory access operations. By making the routing switch universal in its capabilities, the patent achieves high data transmission efficiency through direct access while consolidating multiple functions into a single device rather than adding separate complexity for each function.