US 6,212,164 B1 · ATM switch congestion control method of connection setup requests and priority control method for receiving connection requests

Abstract

An ATM switch and a congestion control method are provided to handle connection setup requests from other ATM devices. In the ATM switch, a congestion detecting process detects congestion of a class that has a number of the connection setup requests stored by class in the buffer equal to T(x), a predetermined number of the connection setup requests to be stored for each of the classes. A message discarding process discards the received connection setup request if it belongs to the congested class. Furthermore, a priority control method for receiving connection setup requests is provided to establish connections more efficiently. A branching process detects a port to which the connection setup request is inputted, identifies a priority class which corresponds to the port using a priority table, and stores the connection setup request in one of queues which are provided for each priority class. An extracting process extracts the connection setup request from the queue of the priority class to be extracted according to a predetermined algorithm.

Claims19

Dependent claims

An ATM switch exchanging inputted connections, comprising:

reception means receiving a connection setup request,
storage means storing the connection setup request received by said reception means,
establishment means extracting the connection setup request stored in said storage means and establishing the connection according to the extracted connection setup request,
detection means detecting a class having a predetermined number of connection setup requests which are stored in said storage means and classified into said class that is equal to a maximum number of connection setup requests for said class, the stored connection setup requests being classified into a plurality of classes, each respectively assigned with a maximum acceptable number of setup requests, and
discard means discarding the connection setup request received by said reception means if the detection means detects said class and the received connection setup request belongs to said class.

2 more elements

An ATM switch exchanging inputted connections, comprising:

reception means receiving a connection setup request,
distinction means distinguishing a priority corresponding to content of the connection setup request which is received by said reception means, by using a condition in which said priority is defined and preferentially receiving the connection setup request in correspondence with the content of the connection setup request,
storage means storing the connection setup request for each of said priorities distinguished by said distinction means,
extraction means extracting the connection setup request corresponding to said priority to be extracted according to an algorithm which is defined based on said priority for extracting the connection setup request, and
establishment means establishing the connection according to the extracted connection setup request.

2 more elements

Dependencies are inferred from the claim text.

ATM switch congestion control method of connection setup requests and priority control method for receiving connection requests

Life of this patent

ATM switch congestion control method of connection setup requests and priority control method for receiving connection requests

Life of this patent

Abstract

Claims19