A device (112) for mitigating effects of impulse noise on data packet transfer over a communication line (102) is configured at least partially according to physical layer characteristics of the communication line (102). As an example, a data packet retransmission device (112) might be configured to retransmit in response to each retransmission request an amount of data packets depending on the physical layer interleaving delay ID and/or data bit rate DBR.
Description
BRIEF DESCRIPTION OF THE DRAWING(S)
FIG. 1 illustrates an embodiment of the device for mitigating effects of impulse noise according to the present invention, the embodiment being an instantiation of a retransmission device in an access node.
Claims
1. A device (112) for mitigating effects of impulse noise on data packet transfer over a communication line (102),
CHARACTERIZED IN THAT said device (112) is configured at least partially according to physical layer characteristics of said communication line (102) or other communication lines in a network where said communication line forms part of.
2. A device (112) according to claim 1,
CHARACTERIZED IN THAT said device (112) is a data packet retransmission device comprising:a. means for memorizing recently transmitted data packets;b. means for receiving a retransmission request for a corrupted data packet;c. means for generating time-outs; andd. means for retransmitting at least said corrupted data packet.
3. A device (112) according to claim 2,
CHARACTERIZED IN THAT said means for retransmitting is configured to retransmit in response to each retransmission request an amount of data packets starting with said corrupted data packet, said amount being dependent on the physical layer interleaving delay ID of said communication line (102).
4. A device (112) according to claim 2,
CHARACTERIZED IN THAT said means for retransmitting is configured to retransmit in response to each retransmission request an amount of data packets starting with said corrupted data packet, said amount being dependent on the physical layer data bit rate DBR of said communication line (102).
5. A device (112) according to claim 3,
CHARACTERIZED IN THAT said means for retransmitting is configured to retransmit in response to each retransmission request an amount of data packets starting with said corrupted data packet, said amount being dependent on the physical layer data bit rate DBR of said communication line (102);further CHARACTERIZED IN THAT said amount is configured to equal ceil (ID×DBR/DPL), with DPL being the packet length of said data packets.
6. A device according to claim 1,
CHARACTERIZED IN THAT said device is a forward error correction device.
7. A device according to claim 6,
CHARACTERIZED IN THAT said forward error correction device is configured according to physical layer inter-arrival time statistics for impulse noise measured on said communication line.
8. A device according to claim 6,
CHARACTERIZED IN THAT said forward error correction device is configured according to ceil (ID×DBR/DPL), with DPL being the packet length of said data packets.
9. A device (112) according to claim 1,
CHARACTERIZED IN THAT said device is integrated in a chip.
10. A device according to claim 1,
CHARACTERIZED IN THAT said device is integrated in a server.
11. A device according to claim 1,
CHARACTERIZED IN THAT said device is implemented on a linecard.
12. A physical layer agent integrated in a device (111) that implements physical layer functions for data packet transfer over a communication line (102),
CHARACTERIZED IN THAT said physical layer agent is adapted to interface with and to share physical layer characteristics with an impulse noise mitigating device (112) as defined in claim 1.
13. A method for mitigating effects of impulse noise on data packet transfer over a communication line (102),
CHARACTERIZED IN THAT said method comprises configuring an impulse noise mitigating device (112) at least partially according to physical layer characteristics of said communication line (102).
Patent Application
20070198898
