Systems and methods for establishing a diagnostic transmission mode and communicating over the same

Patent metadata

Field	Value
Publication number	US-9838531-B2
Application number	US-201615295602-A
Country	US
Kind code	B2
Filing date	Oct 17, 2016
Priority date	Jan 7, 2000
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

Upon detection of a trigger, such as the exceeding of an error threshold or the direction of a user, a diagnostic link system enters a diagnostic information transmission mode. This diagnostic information transmission mode allows for two modems to exchange diagnostic and/or test information that may not otherwise be exchangeable during normal communication. The diagnostic information transmission mode is initiated by transmitting an initiate diagnostic link mode message to a receiving modem accompanied by a cyclic redundancy check (CRC). The receiving modem determines, based on the CRC, if a robust communications channel is present. If a robust communications channel is present, the two modems can initiate exchange of the diagnostic and/or test information. Otherwise, the transmission power of the transmitting modem is increased and the initiate diagnostic link mode message re-transmitted to the receiving modem until the CRC is determined to be correct.

First claim

What is claimed is:

1. A diagnostic link system for communicating data between modems using multicarrier modulation comprising:
an initiate diagnostic mode trigger that instructs a transmitting modem to forward an initiate diagnostic mode message to a receiving modem;
a message determination device that determines a diagnostic link message;
a receiving modem diagnostic device that receives the diagnostic link message and determines the accuracy of the diagnostic link message; and
the transmitting modem further operable to transmit a message over a wired link upon the receiving modem determining that a predetermined error threshold has been exceeded, the message comprising an array comprising a plurality of elements, wherein each element comprises information associated with a received power level of at least one subchannel.

2. A multicarrier transceiver comprising:
a receiver portion operable to receive via a wired link;
a transmitter portion operable to transmit via the same wired link;
the receiver portion further operable to determine whether a predetermined error threshold during normal steady state data transmission over the wired link has been exceeded;
the receiver portion further operable to measure a received power level on each of a plurality of subchannels;
the receiver portion further operable to receive a message requesting information associated with the measurement of the received power level on each of a plurality of subchannels; and
the transmitter portion further operable to transmit a message over the wired link upon the receiver portion determining that the predetermined error threshold has been exceeded, the message comprising an array comprising a plurality of elements, wherein each element comprises information associated with the received power level of at least one subchannel.

3. The multicarrier transceiver of claim 2 , wherein the transceiver is DSL modem.

4. The multicarrier transceiver of claim 2 , wherein the transceiver is customer premises modem.

5. The multicarrier transceiver of claim 2 , wherein the transceiver is located in a central office.

6. The multicarrier transceiver of claim 2 , wherein the transceiver is located in a customer premises.

7. The multicarrier transceiver of claim 2 , wherein the transceiver is an ATU-R.

8. The multicarrier transceiver of claim 2 , wherein the transceiver is ATU-C.

9. The multicarrier transceiver of claim 7 , further wherein the transmitter portion is further operable to retransmit the message a plurality of times.

Assignees

• Tq Delta Llc

Inventors

• Krinsky David M
• Pizzano Jr Robert Edmund

Classifications

• H04L1/0001

  Systems modifying transmission characteristics according to link quality, e.g. power backoff (adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04) · CPC title

• H04M3/2227

  Quality of service monitoring · CPC title

• H04L1/0061

  Error detection codes · CPC title

• H04L1/18

  Automatic repetition systems, e.g. Van Duuren systems · CPC title

• H04L27/2601

  Multicarrier modulation systems · CPC title