Communication system, control apparatus, and communication method

Patent metadata

Field	Value
Publication number	US-9419910-B2
Application number	US-201214344472-A
Country	US
Kind code	B2
Filing date	Sep 12, 2012
Priority date	Sep 13, 2011
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

A communication system includes: a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s); a first control apparatus setting the first packet handling operation(s) in the forwarding node(s); a flow control node(s) arranged upstream of the forwarding node(s); and a second control apparatus setting a second packet handling operation(s) in the flow control node(s). The flow control node(s) intercepts forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s) in accordance with the second packet handling operation(s).

First claim

What is claimed is:

1. A communication system, comprising:
a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s);
a first control apparatus setting the first packet handling operation(s) in the forwarding node(s);
a flow control node(s) arranged upstream of the forwarding node(s); and
a second control apparatus setting a second packet handling operation(s) in the flow control node(s),
wherein the flow control node(s) intercepts forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s) in accordance with the second packet handling operation(s); and
wherein the second control apparatus sets a packet handling operation(s) having fewer fields that are matched against incoming packets in the flow control node(s), compared with a packet handling operation(s) set in the forwarding node(s).

2. The communication system according to claim 1 ;
wherein a plurality of flow control nodes are arranged in series with each other; and
wherein the second control apparatus sets the second packet handling operation(s) so that packets are dropped in stages by the individual flow control nodes.

3. A communication system, comprising:
a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s);
a first control apparatus setting the first packet handling operation(s) in the forwarding node(s);
a flow control node(s) arranged upstream of the forwarding node(s); and
a second control apparatus setting a second packet handling operation(s) in the flow control node(s),
wherein the flow control node(s) intercepts forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s) in accordance with the second packet handling operation(s); and
wherein the second control apparatus sets fewer packet handling operations than packet handling operations set in the forwarding node(s) in the flow control node(s).

4. The communication system according to claim 3 ;
wherein a plurality of flow control nodes are arranged in series with each other; and
wherein the second control apparatus sets the second packet handling operation(s) so that packets are dropped in stages by the individual flow control nodes.

5. A communication system, comprising:
a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s);
a first control apparatus setting the first packet handling operation(s) in the forwarding node(s);
a flow control node(s) arranged upstream of the forwarding node(s); and
a second control apparatus setting a second packet handling operation(s) in the flow control node(s),
wherein the flow control node(s) intercepts forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s) in accordance with the second packet handling operation(s); and
wherein the second control apparatus sets a packet handling operation(s) having a longer valid period(s) in the flow control node(s) than a valid period(s) of a packet handling operation(s) set in the forwarding node(s).

6. The communication system according to claim 5 ;
wherein a plurality of flow control nodes are arranged in series with each other; and
wherein the second control apparatus sets the second packet handling operation(s) so that packets are dropped in stages by the individual flow control nodes.

7. A communication system, comprising:
a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s);
a first control apparatus setting the first packet handling operation(s) in the forwarding node(s);
a flow control node(s) arranged upstream of the forwarding node(s); and
a second control apparatus setting a second packet handling operation(s) in the flow control node(s),
wherein the flow control node(s) intercepts forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s) in accordance with the second packet handling operation(s);
wherein the flow control node(s) intercepts forwarding of the packets that do not satisfy a predetermined condition(s) to the forwarding node(s) by dropping the packets that do not satisfy a predetermined condition(s) or by forwarding the packets to a node(s) other than the forwarding node(s);
wherein the second control apparatus sets a second packet handling operation(s) for causing, if the flow control node(s) receives a packet that does not satisfy a predetermined condition(s), the flow control node(s) to write information indicating that the packet needs to be dropped in a predetermined region of the packet, instead of causing the flow control node(s) to drop the packet or forward the packet to a node(s) other than the forwarding node(s);
wherein the flow control node(s) writes the information indicating that the packet needs to be dropped in the predetermined region of the packet that does not satisfy a predetermined condition(s) in accordance with the second packet handling operation(s) and forwards the packet to the forwarding node(s); and
wherein the first control apparatus sets a packet handling operation(s) for causing the forwarding node(s) to drop the packet in which the information indicating that the packet needs to be dropped is written.

8. A second control apparatus in a communication system comprising:
a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s);
a first control apparatus setting the first packet handling operation(s) in the forwarding node(s); and
a flow control node(s) arranged upstream of the forwarding node(s);
wherein the second control apparatus sets a second packet handling operation(s) in the flow control node(s) and causes the flow control node(s) to intercept forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s); and
wherein the second control apparatus sets a packet handling operation(s) having fewer fields that are matched against incoming packets in the flow control node(s), compared with a packet handling operation(s) set in the forwarding node(s).

9. The second control apparatus according to claim 8 ;
wherein the second control apparatus sets the second packet handling operation(s) so that packets are dropped in stages by a plurality of flow control nodes arranged in series with each other.

10. A second control apparatus in a communication system comprising:
a forwarding node(s) in which a first packet handling operation(s) for processing incoming packets is set and which processes packets in accordance with the packet handling operation(s);
a first control apparatus setting the first packet handling operation(s) in the forwarding node(s); and
a flow control node(s) arranged upstream of the forwarding node(s);
wherein the second control apparatus sets a second packet handling operation(s) in the flow control node(s) and causes the flow control node(s) to intercept forwarding of packets that do not satisfy a predetermined condition(s) to the forwarding node(s); and
wherein the second control apparatus sets fewer packet handling operations than packet handling operations set in the forwarding node(s) in the flow control node(s).

11. The second control apparatus ac

Assignees

• Yamagata Masaya
• Shimonishi Hideyuki
• Sonoda Kentaro
• Hatano Yoichi
• Nakae Masayuki
• Morita Yoichiro
• Sasaki Takayuki
• Nec Corp

Inventors

• Yamagata Masaya
• Shimonishi Hideyuki
• Sonoda Kentaro
• Hatano Yoichi
• Nakae Masayuki
• Morita Yoichiro
• Sasaki Takayuki

Classifications

• H04L47/32 Primary

  by discarding or delaying data units, e.g. packets or frames · CPC title

• H04L47/12 Primary

  Avoiding congestion; Recovering from congestion · CPC title

• H04L63/0236

  Filtering by address, protocol, port number or service, e.g. IP-address or URL · CPC title

• H04L63/101

  Access control lists [ACL] · CPC title

• H04L49/505

  Corrective measures · CPC title