Method and system for unloading T1 payloads from ATM cells
AssigneeMCI Communications Corporation
InventorForrest L. Pierson, Jr.
Life of this patent
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Abstract
The present invention is directed to a method and system for unloading one or more T1 payloads from a target ATM cell where a target ATM cell has traveled over an ATM network that is emulating a T1 link. A plurality of ATM cells are stored in a cell buffer at a first rate. A buffer controller selects the target ATM cell from the bottom of the cell buffer. The buffer controller sends the T1 payloads carried in the target ATM cell to an elastic store buffer. The elastic buffer sends a plurality of timeslots in each T1 payload to a switch matrix at a second rate.
Claims32
A method of unloading one or more T1 payloads from a target ATM cell, wherein said target ATM cell has traveled over an ATM network, wherein the ATM network is emulating a T1 link, the method comprising the steps of:
- storing a plurality of ATM cells in a cell buffer at a first rate, wherein the first rate is an incoming cell rate;
- selecting an ATM cell at a bottom of the cell buffer as the target ATM cell;
- sending the one or more T1 payloads from the target ATM cell to an elastic store buffer, wherein each of the T1 payloads contains a plurality of timeslots;
- and
- sending the plurality of timeslots from the elastic store buffer to a switch matrix at a second rate, wherein the second rate is set by the switch matrix, wherein the first rate and the second rate are generally asynchronous.
A system for unloading one or more T1 payloads from a target ATM cell, wherein said target ATM cell has traveled over an ATM network, wherein the ATM network is emulating a T1 link, the system comprising:
- storing means for storing a plurality of ATM cells in a cell buffer at a first rate, wherein said first rate is an incoming cell rate;
- selecting means for selecting a ATM cell at a bottom of said cell buffer as the target ATM cell;
- first sending means for sending the one or more T1 payloads from the target ATM cell to an elastic store buffer, wherein each of the one or more T1 payloads contains a plurality of timeslots;
- and
- second sending means for sending said plurality of timeslots from the elastic store buffer to a switch matrix at a second rate, wherein said second rate is set by said switch matrix, wherein said first rate and said second rate are generally asynchronous.
A system for unloading one or more payloads from a target ATM cell, wherein said target ATM cell has traveled over an ATM network, wherein the ATM network is emulating a communications link, the system comprising:
- storing means for storing a plurality of ATM cells in a cell buffer at a first rate, wherein said first rate is an incoming ATM cell rate;
- selecting means for selecting a ATM cell at a bottom of said cell buffer as the target ATM cell;
- sending means for sending the one or more T1 payloads from the target ATM cell to an elastic store buffer, wherein each of the one or more T1 payloads contains a plurality of timeslots;
- and
- sending means for sending said plurality of timeslots from the elastic store buffer to a switch matrix at a second rate, wherein said second rate is set by said switch matrix, wherein said first rate and said second rate are generally asynchronous.
Dependencies are inferred from the claim text.