Method and apparatus for providing combined processing of packet and cell data
In accordance with one or more embodiments of the present invention, a method and system for providing combined processing of cell traffic and packet traffic is described. For a communication device, the improved system provides a series of inputs on a single line card for processing both ATM traffic (e.g., native ATM or encapsulated packets) and packet traffic. The system receives the cell traffic and packet traffic, then converts them into a common form. The converted traffic traverses the fabric, then the system reconstitutes the converted traffic into its original form. The system provides output as ATM traffic or packet traffic, as originally received.
1 . A method for providing combined processing of cell traffic and packet traffic comprising:
receiving the cell traffic and the packet traffic at a processing module comprising a reassembly queue;
converting the packet traffic into converted packet traffic compatible with cell transmission requirements; and
forwarding the cell traffic and the converted packet traffic to a switching fabric.
2 . The method of claim 1 further comprising:
terminating a first virtual connection of the cell traffic at the processing module.
3 . The method of claim 2 further comprising:
transferring cells of the first virtual connection at the processing module to form a contiguous sequence of the cells in a second virtual connection.
4 . The method of claim 1 further comprising:
analyzing a cell header of a first cell of the converted packet traffic to determine whether an end of a first packet occurs within the first cell.
5 . The method of claim 4 further comprising:
when the end of the first packet is determined to occur with the first cell, interpreting descriptive information concerning the first packet, the descriptive information occurring within the first cell.
6 . The method of claim 5 wherein the step of interpreting descriptive information further comprises:
interpreting an asynchronous transfer mode (ATM) adaptation layer 5 (AAL5) trailer.
7 . The method of claim 5 wherein the step of forwarding the cell traffic and the converted packet traffic to the switching fabric is performed based on the step of interpreting the descriptive information concerning the first packet.
8 . The method of claim 1 wherein the step of forwarding the cell traffic and the converted packet traffic to the switching fabric further comprises:
reassembling the cell traffic into outgoing cell traffic and the converted packet traffic into outgoing converted packet traffic, the outgoing cell traffic and the outgoing converted packet traffic being forwarded to the switching fabric.
9 . The method of claim 1 further comprising:
altering the converted packet traffic at the processing module.
10 . The method of claim 9 wherein the step of altering the converted packet traffic at the processing module further comprises:
changing the amount of data of the converted packet traffic.
11 . A system for providing combined processing of cell traffic and packet traffic through a single interface, the system comprising:
an input/output module for receiving the cell traffic and packet traffic;
a processing module for converting the packet traffic into converted packet traffic compatible with cell transmission requirements; and
a switching fabric for receiving the cell traffic and the converted packet traffic forwarded from the processing module.
12 . The system of claim 11 wherein the processing module terminates a first virtual connection of the cell traffic.
13 . The system of claim 12 wherein the processing module transfers cells of the first virtual connection to form a contiguous sequence of the cells in a second virtual connection.
14 . The system of claim 11 wherein the processing module analyzes a cell header of a first cell of the converted packet traffic to determine whether an end of a first packet occurs within the first cell.
15 . The system of claim 14 wherein, when the end of the first packet is determined to occur with the first cell, the processing module interprets descriptive information concerning the first packet, the descriptive information occurring within the first cell.
16 . The system of claim 15 wherein the descriptive information comprises an asynchronous transfer mode (ATM) adaptation layer 5 (AAL5) trailer.
17 . The system of claim 15 wherein the processing module forwards the cell traffic and the converted packet traffic to the switching fabric based on the descriptive information concerning the first packet.
18 . The system of claim 11 wherein the processing module reassembles the cell traffic into outgoing cell traffic and the converted packet traffic into outgoing converted packet traffic, the outgoing cell traffic and the outgoing converted packet traffic being forwarded to the switching fabric.
19 . The system of claim 11 wherein the processing module alters the converted packet traffic.
20 . The system of claim 19 wherein the processing module, by altering the converted packet traffic, changes the amount of data of the converted packet traffic.