Patent ID: 11929910
Assignee: ORANGE
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A communication method implemented by a first router of an autonomous system using an interior gateway protocol, said communication method comprising:
determining at least one flow control parameter for sending messages of the interior gateway protocol to the first router, said at least one flow control parameter being determined based on a capacity of the first router to process said messages of the interior gateway protocol; and announcing, in a message of the interior gateway protocol, said at least one flow control parameter to at least a second router of the autonomous system, which is a neighbor of the first router, wherein during the determining, at least one of said at least one flow control parameter is determined further based on at least one element among:
a position of the second router in a topology of the autonomous system;
a capacity to send messages of the interior gateway protocol, required for the second router given its role in the autonomous system;
a filtering capacity to protect against a denial-of-service attack of the first router;
a flow control parameter for messages of the interior gateway protocol announced by at least one router of the autonomous system which is a neighbor of the first router or known to the first router for said at least one router; or
a state of stability of the interior gateway protocol (“IGP”) and/or of the autonomous system, wherein the state of stability of the autonomous system is determined by the first router from the number of routing or topology change IGP messages in the autonomous system,
wherein when one of said at least one flow control parameter is determined further based on the position of the second router in the topology of the autonomous system, the determining of the flow control parameter comprises:
prioritizing resources for receiving IGP messages from the second router when the second router holds a central position in the topology, is a core router, or is an access router of the autonomous system that is oriented towards processing dedicated to clients; and
when one of said at least one flow control parameter is determined further based on the capacity to send messages of the interior gateway protocol, required for the second router given its role in the autonomous system, the determining of the flow control parameter comprises:
allocating more IGP message processing resources to the second router when the second router has a greater need in terms of rate, rhythm or volume to announce the IGP messages to the first router, and allocating fewer IGP message processing resources to the second router when the second router has a lesser need to announce the IGP messages to the first router.