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Asynchronous-transfer-mode-communication-with-inverse-multiplexing-over-multiple-communication-links

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Asynchronous transfer mode communication with inverse multiplexing over multiple communication links

Details

Inventors: Sathe, Shirish K.; Corbalis, Charles M.; Schmidt, Uri; Moley, Richard M.;
Assignee: Cisco Technology, Inc. (San Jose, CA)
Primary Examiner: Hsu; Alpus H.
Assistant Examiner: Ngo; Ricky Q.
Attorney, Agent or Firm: Blakely Sokoloff Taylor & Zafman LLP

An asynchronous transfer mode inverse multiplexed communication system is disclosed wherein a series of communication cells are multiplexed over a set of communication links. Each communication cell includes a framing bit of a predetermined framing bit stream for each communication link and a control channel bit of a control message for each communication link. Inbound communication cells from each communication link are aligned according to the corresponding framing bit stream. The control message specifies an ordered list of logical identifiers to indicate a multiplexed sequence of transfer of the communication cells over the communication links.

DETAILED DESCRIPTION FIG.
1 illustrates a communication network 20 for one embodiment.
The communication network 20 comprises a set of communication nodes 22-32 coupled for communication over a set of communication links 40-48 and a set of communication links 50.
The communication network 20 enables communication according to an asynchronous transfer mode communication protocol.
The communication nodes 26 and 28 enable point to point inversed multiplexed asynchronous transfer mode communication via the communication links 50.
The communication links 50 comprise a set of communication links 1-N.
For one embodiment, each of the communication links 1-N comprises a T1 common carrier communication link.
For another embodiment, each of the communication links 1-N comprises an E1 common carrier communication link.
The communication nodes 26 and 28 exchange streams of communication cells via the communication links 1-N.
The aggregate bandwidth of the communication links 1-N provides point to point communications between the communication nodes 26 and 28 at an effective data rate of N times the data rate of each of the individual communication links 1-N.
For example, in an embodiment wherein the communication links 50 comprise a set of four T1 common carrier communication links the maximum effective data rate communication between the communication nodes 26 and 28 is 4.
times.
1.
536 megabits per second.
The communication node 26 transfers outbound sequences of communication cells to the communication node 28 by inverse multiplexing the outbound communication cells over the communication links 1-N in a round robin fashion.
The communication node 28 receives inversed multiplexed inbound communication cells from the communication node 26 over the communication links 1-N and reconstructs the original sequence of communication cells.
The communication node 28 compensates for the differing delays associated with each of the communication links 1-N.
Similarly, the communication node 28 inverses multiplexes outbound sequences of communication cells to the communication node 26 over the communication links 1-N in a round robin fashion

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