US 2012/0236715 A1 · Measurement Based Admission Control Using Explicit Congestion Notification In A Partitioned Network

Abstract

A device and method for implementing a measurement based admission control (MBAC) protocol consists of various devices having software modules running thereon which are capable of calculating a congestion level based upon the detection of incoming packets having Explicit Congestion Notification (ECN) bits set by one or more routers in an encrypted core domain of a partitioned network. Upon detecting a certain congestion level at an egress edge of the network, a UDP packet is transmitted back to the ingress edge of the network wherein certain types or percentages of certain types of packets are blocked to relieve the congestion on the network. Once the congestion level on the network falls below a certain level, those packets may be transmitted.

Claims18

Dependent claims

A system for implementing a measurement based access control protocol in a partitioned network comprising:

a first hardware device acting as an ingress edge to a core of said network, said first hardware device running software for performing the following functions:
(a) intercepting outgoing IP packets and enabling ECN for said packets;
(b) receiving incoming feedback packets, each of said feedback packets indicating a change in a current congestion level;
and
(c) implementing a policy wherein outgoing packets are blocked, said policy being based on said current congestion level;
and
a second hardware device acting as an egress edge to a core of said network, said second hardware device running software for performing the following functions:
(a) receiving incoming packets;
(b) tracking the percentage of said incoming packets indicating that congestion was encountered;
(c) calculating one or more congestion levels;
and
(d) transmitting, via outgoing packets, said congestion levels to said first hardware device.

9 more elements

Dependencies are inferred from the claim text.

Measurement Based Admission Control Using Explicit Congestion Notification In A Partitioned Network

Life of this patent

Measurement Based Admission Control Using Explicit Congestion Notification In A Partitioned Network

Life of this patent

Abstract

Claims18