Parallel detection of remote LPI request and send zero mode

Details Parallel detection of remote LPI request and send zero mode Parallel detection of remote LPI request and send zero mode

2011-05-03

2011-05-03

Duong, Frank (Department: 2474)

Multiplex communications

Channel assignment techniques

Details of circuit or interface for connecting user to the...

Reexamination Certificate

active

07936777

ABSTRACT:
Embodiments of the present invention enable robust and quick parallel detection of the remote LPI request signal (rem_lpi_req) and SEND ZERO mode (SEND_Z) defined in the Energy Efficient Ethernet (EEE) standard. Embodiments do not rely on energy detection for detecting SEND_Z. Therefore, SEND_Z can be detected reliably and with minimal latency. In addition, since SEND_Z and rem_lpi_req are detected in parallel, embodiments are not concerned with the false detection of rem_lpi_req (before SEND_Z is detected) or the need to disable detection of rem_lpi_req (after SEND_Z is detected).

REFERENCES:
patent: 2008/0225841 (2008-09-01), Conway et al.
patent: 2009/0282277 (2009-11-01), Sedarat et al.
Healey et al, 1000BASE-T Low-Power Idle, LSI Corporation, 14 pages, Jan. 2008.
Grimwood et al, IEEE P802.3az/D1.o Clause 40 Ipi—mode Encoding, Broadcom, 12 pages, Nov. 2008.
Dove, Energy Efficient Ethernet Switching Perspective, ProCurve Networking by HP, 19 pages, May 2008.
Gunaratne et al, Reducing the Energy Consumption of Ethernet with Adaptive Link Rate (ALR), IEEE, Apr. 2008.

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