Switching architecture with packet encapsulation
First Claim
1. A system for passing Time Division Multiplexing (TDM) traffic through a packet switch, comprising:
- a packet switch having a plurality of data ports and being capable of routing Fixed Size Data Unit (FSDU) packets between the plurality of data ports;
a TDM encapsulation circuit coupled to a data flow of TDM data and having a circuit demultiplexer for processing an incoming data flow of TDM data to buffer data associated with different TDM circuits into different buffer locations, a timer for monitoring a frame boundary,a FSDU generator for generating an FSDU and filling the generated FSDU with data associated with a respective one of the TDM circuits and for generating header information representative of information for allowing the packet switch to route the generated FSDU to a port associated with the respective one of the TDM circuits; and
a jitter buffer for reducing variable delays arising from passing through the packet switch, wherein the jitter buffer has a size selected to maintain jitter below 125 microseconds.
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Accused Products
Abstract
The invention includes, among other things, a system for passing TDM traffic through a packet switch. In one embodiment, the system includes a packet switch that has a plurality of data ports and is capable of routing FSDU packets between the plurality of data ports. A TDM encapsulation circuit process a TDM data flow that is incoming to the switch. A circuit demultiplexer processes the incoming data flow to buffer data associated with different TDM circuits into different buffer locations. A timer monitors the amount of time available to fill the FSDU, and when the time period reaches the frame boundary, an FSDU generator generates an FSDU that is filled with data associated with the TDM circuits. Header information is added for allowing the packet switch to route the generated FSDU to a port associated with the respective TDM circuit.
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Citations
20 Claims
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1. A system for passing Time Division Multiplexing (TDM) traffic through a packet switch, comprising:
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a packet switch having a plurality of data ports and being capable of routing Fixed Size Data Unit (FSDU) packets between the plurality of data ports; a TDM encapsulation circuit coupled to a data flow of TDM data and having a circuit demultiplexer for processing an incoming data flow of TDM data to buffer data associated with different TDM circuits into different buffer locations, a timer for monitoring a frame boundary, a FSDU generator for generating an FSDU and filling the generated FSDU with data associated with a respective one of the TDM circuits and for generating header information representative of information for allowing the packet switch to route the generated FSDU to a port associated with the respective one of the TDM circuits; and a jitter buffer for reducing variable delays arising from passing through the packet switch, wherein the jitter buffer has a size selected to maintain jitter below 125 microseconds. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 19)
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12. A process for passing Time Division Multiplexing (TDM) traffic through a packet switch having a plurality of data ports and being capable of routing Fixed Size Data Unit (FSDU) packets between the plurality of data ports, the process comprising;
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encapsulating a TDM data flow by sorting the TDM data flow into different respective buffer locations; generating an FSDU that can pass through the packet switch and filling the generated FSDU with data associated with a respective one of the TDM circuits; generating header information representative of information for routing the generated FSDU to a port associated with the respective one of the TDM circuits; combining the generated FSDU with a flow of packet data being sent to the packet switch; and with a jitter buffer, reducing variable delays arising from passing through the packet switch, wherein the jitter buffer has a size selected to maintain jitter below 125 microseconds. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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20. A process for passing Time Division Multiplexing (TDM) traffic through a packet switch having a plurality of data ports and being capable of routing Fixed Size Data Unit (FSDU) packets between the plurality of data ports, the process comprising;
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encapsulating a TDM data flow by sorting the TDM data flow into different respective buffer locations; generating an FSDU that can pass through the packet switch and filling the generated FSDU with data associated with a respective one of the TDM circuits; generating header information representative of information for routing the generated FSDU to a port associated with the respective one of the TDM circuits; combining the generated FSDU with a flow of packet data being sent to the packet switch; and setting a timer to establish a time period for filling the generated FSDU, wherein the time period is set to a TDM frame boundary period.
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Specification