US 2011/0255539 A1Published application

Communication System and Communication Control Device

AssigneeHitachi, Ltd.

InventorsKazuma Yumoto, Takuji Kawai

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Abstract

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.

Claims13

Dependent claims

A communication system comprising:

a U-plane controller for performing a transfer process for a data packet using a U-plane through which the data packet is passed;
and
a C-plane controller for managing routing information of the U-plane controller using a C-plane through which a routing protocol packet and a control message including a routing table update request are passed, and notifying the U-plane controller of the routing table update request;
a network having C/U separation being composed of the U-plane controller and the C-plane controller;
and
a unified C/U user router that performs both the management of routing information and the transfer process for the data packet being connected to the U-plane controller;
wherein
the U-plane controller includes:
a routing table for transferring the data packet to a destination;
a communication control processing section for analyzing the content of a received packet;
a routing protocol processing section for intermediating the exchange of routing information between the user router and the C-plane controller, without reflecting the content of the received packet to the routing table of its own, if analyzed content of the received packet is a routing protocol;
and
a routing information update processing section for updating the routing table of its own in accordance with a routing table update request, if the analyzed content of the received packet is the routing table update request notified from the C-plane controller.

10 more elements

A communication control device for performing a transfer process for a data packet using a U-plane through which the data packet is passed, the communication control device making up a network having C/U separation together with a C-plane controller for managing routing information of the communication control device using a C-plane through which a routing protocol packet and a control message including a routing table update request are passed, and notifying the communication control device of the routing table update request, and the communication control device connecting a unified C/U user router that performs both the management of routing information and the transfer process for the data packet to the network having C/U separation;

wherein
the communication control device includes:
a routing table for transferring the data packet to a destination;
a communication control processing section for analyzing the content of a received packet;
a routing protocol processing section for intermediating the exchange of routing information between the user router and the C-plane controller, without reflecting the content of the received packet to the routing table of its own, if analyzed content of the received packet is a routing protocol;
and
a routing information update processing section for updating the routing table of its own in accordance with a routing table update request, if the analyzed content of the received packet is the routing table update request notified from the C-plane controller.

4 more elements

Dependencies are inferred from the claim text.