Multicarrier transmission system with low power sleep mode and rapid-on capability

• US 7,697,598 B2
• Filed: 06/21/2006
• Issued: 04/13/2010
• Est. Priority Date: 01/26/1998
• Status: Expired due to Fees

• Current Assignee: TQ Delta LLC (Techquity Capital Management, LLC)
• Original Assignee: Aware Incorporated (Crowley Holdings Preferred LLC)
• Inventors: Greszczuk, John A., Padir, Halil, Gross, Richard W., Tzannes, Michael A.
• Primary Examiner(s): Tran, Khai
• Application Number:
  US11/425,507
• Publication Number:
  US 20060233273A1
• Time in Patent Office: 1,392 Days
• Field of Search: 375/219, 375/220, 375/260, 375/222, 375/356, 375/282, 375/503, 375/373, 375/376, 370/311, 370/278, 370/282, 370/503, 455/73, 455/83, 455/88, 455/551, 455/560
• US Class Current: 375/219
• CPC Class Codes: H04B 1/40 Circuits
• CPC Class Codes: H04L 12/12 Arrangements for remote connection or disconnection of substations or of equipment thereof
• CPC Class Codes: H04L 12/40006 Architecture of a communication node current supply arrangements H04L12/10; intermediate storage or scheduling H04L49/90
• CPC Class Codes: H04L 12/40169 Flexible bus arrangements arrangements for maintenance or administration involving management of faults; events, alarms H04L41/06; automatic restoration of network faults H04L41/0654
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: H04W 52/0241 where no transmission is received, e.g. out of range of the transmitter
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A multicarrier transceiver is provided with a sleep mode in which it idles with reduced power consumption when it is not needed to transmit or receive data. The full transmission and reception capabilities of the transceiver are quickly restored when needed, without requiring the full (and time-consuming) initialization commonly needed to restore such transceivers to operation after inactivity.

Claims

1. A method for a multicarrier transceiver to have a low power sleep mode capability comprising:

during a normal, non-sleep mode operation, receiving a timing reference signal from a FFT at a phase-lock loop (PLL), and

locking the PLL to the timing reference signal; and

during a sleep-mode, where the FFT is dormant;

receiving a timing reference signal from an output of analog-to-digital converter detected by a detector,

wherein the timing reference signals are supplied to the PLL based on controller-based switching corresponding to a power mode.

2. The method of claim 1, further comprising receiving a power down indicator.

3. The method of claim 1, wherein the power down indicator is one or more of a message, a tone, an inverted sync symbol, a flag and a cessation of data transmission.

4. The method of claim 1, further comprising transmitting several frames on known test data before transmission of user data.

5. A multicarrier transceiver having a low power sleep mode capability comprising:

means for, during a normal, non-sleep mode operation, receiving a timing reference signal from a FFT at a phase-lock loop (PLL), and

means for locking the PLL to the timing reference signal; and

during a sleep-mode, where the FFT is dormant;

means for receiving a timing reference signal from an output of analog-to-digital converter detected by a detector,

wherein the timing reference signals are supplied to the PLL based on controller-based switching corresponding to a power mode.

6. The method of claim 5, further comprising means for receiving a power down indicator.

7. The method of claim 5, wherein the power down indicator is one or more of a message, a tone, an inverted sync symbol, a flag and a cessation of data transmission.

8. The method of claim 5, further comprising means for transmitting several frames on known test data before transmission of user data.