Communication system

摘要

A communication system may include a first network connected to lower-layer equipment, a second network connected to a higher-layer application, a gateway device connected to the first network and the second network, and a tunnel device connected to the first network and the second network, the tunnel device bypassing the gateway device.

主权项

1. A communication system comprising:
a first network connected to lower-layer equipment; a second network connected to a higher-layer application being higher than the lower-layer equipment; a gateway device connected to the first network and the second network; and a tunnel device connected to the first network and the second network, the tunnel device bypassing the gateway device, wherein: when the higher-layer application transmits a network connection request to the tunnel device, then a network connection response is returned to the higher-layer application, and when the higher-layer application receives the network connection response, then the higher-layer application sets up a virtual tunnel for connecting the higher-layer application to the tunnel device to virtually extend the first network to the higher-layer application, and directly communicates with the lower-layer equipment via the virtual tunnel; wherein the tunnel device comprises a first communication stack connected to the first network and a second communication stack connected to the second network; wherein the second communication stack comprises an encryption and authentication processing unit configured to execute an encryption process and an authentication process for communication between the tunnel device and the higher-layer application; and wherein, in order to improve a fault tolerance of the tunnel device, the tunnel device comprises a tunnel device synchronization unit configured to synchronize and equalize mutual setting information with another tunnel device for backup connected to the first network and the second network.