Communication system and communication control device

摘要

Provided is a communication system which connects a unified C/U router to a network having C/U separation, wherein the stopping of U-plane communication of the unified C/U router is prevented even when the messages transmitted from a C-plane controller of the network having C/U separation do not arrive because of faults in the network having C/U separation. The routing information of a C-plane message (routing protocol) received by a U-plane controller is sent to an adjacent peer without being reflected in a routing table of the U-plane controller. The routing table of the U-plane controller is generated on the basis of the routing information (FIB information) received directly from the C-plane controller. In addition, a keep-alive packet from the unified C/U router is not sent to the C-plane controller and keeps alive the connection with the user router at the transmission destination.

主权项

1. A communication system comprising:
at least one user data plane controller that performs a transfer process for a data packet using a user data plane through which the data packet is passed, and is coupled to a node device that communicates according to a routing protocol; and a control plane controller that manages routing information of the user data plane controller using a control plane through which a control message is passed, wherein: a network having control plane/user data plane separation is configured by the user data plane controller and the control plane controller, the user data plane controller:
includes a first information which manages information for directing a routing protocol packet toward the control plane controller and a second information which manages information for directing a data packet toward the node device, andwhen receiving the routing protocol packet that includes the routing information of the node device, directs the received routing protocol packet to the control plane controller with reference to the first information without revising the second information, the control plane controller:
manages the routing information of the user data plane controller and the node device based on the routing information included in the transmitted routing protocol packet,when managed routing information is changed, generates a second information update request packet, andtransmits the second information update request packet to the user data plane controller, and the user data plane controller updates, when the second information update request packet addressed to the user data plane controller is received from the control plane controller, the second information in accordance with the request.