Source: http://www.google.com/patents/US7835430?dq=5,966,702
Timestamp: 2014-07-10 19:13:28
Document Index: 637477050

Matched Legal Cases: ['Application No. 01901808', 'Application No. 10', 'Application No. 2004203321', 'Application No. 2008203520', 'Application No. 27669', 'Application No. 2008203520', 'Application No. 27669', 'Application No. 2001', 'Application No. 2', 'Application No. 01901808', 'Application No. 01901808', 'Application No. 2001', 'Application No. 2008']

Patent US7835430 - Multicarrier modulation messaging for frequency domain received idle channel ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsUpon 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...http://www.google.com/patents/US7835430?utm_source=gb-gplus-sharePatent US7835430 - Multicarrier modulation messaging for frequency domain received idle channel noise informationAdvanced Patent SearchPublication numberUS7835430 B2Publication typeGrantApplication numberUS 12/477,742Publication dateNov 16, 2010Filing dateJun 3, 2009Priority dateJan 7, 2000Fee statusPaidAlso published asCA2394491A1, CA2394491C, CA2788662A1, DE60124069D1, DE60124069T2, EP1245093A2, EP1245093B1, EP1755253A1, EP1755253B1, EP2270996A2, EP2270996A3, EP2276182A2, EP2276182A3, EP2293459A2, EP2293459A3, EP2317684A2, EP2317684A3, US6658052, US7570686, US7889784, US8238412, US8432956, US8634449, US8743931, US20010040918, US20040202237, US20090238254, US20100220775, US20100226418, US20110103443, US20120230476, US20130243049, US20140126616, WO2001052516A2, WO2001052516A3Publication number12477742, 477742, US 7835430 B2, US 7835430B2, US-B2-7835430, US7835430 B2, US7835430B2InventorsDavid M. Krinsky, Robert Edmund Pizzano, Jr.Original AssigneeAware, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (38), Non-Patent Citations (24), Referenced by (3), Classifications (38), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetMulticarrier modulation messaging for frequency domain received idle channel noise informationUS 7835430 B2Abstract 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.
FIELD OF THE INVENTION This invention relates to test and diagnostic information. In particular, this invention relates to a robust system and method for communicating diagnostic information.
BACKGROUND OF THE INVENTION The exchange of diagnostic and test information between transceivers in a telecommunications environment is an important part of a telecommunications, such as an ADSL, deployment. In cases where the transceiver connection is not performing as expected, for example, where the data rate is low, where there are many bit errors, or the like, it is necessary to collect diagnostic and test information from the remote transceiver. This is performed by dispatching a technician to the remote site, e.g., a truck roll, which is time consuming and expensive.
SUMMARY OF THE INVENTION The systems and methods of this invention are directed toward reliably exchanging diagnostic and test information between transceivers over a digital subscriber line in the presence of voice communications and/or other disturbances. For simplicity of reference, the systems and methods of the invention will hereafter refer to the transceivers generically as modems. One such modem is typically located at a customer premises such as a home or business and is �downstream� from a central office with which it communicates. The other modem is typically located at the central office and is �upstream� from the customer premises. Consistent with industry practice, the modems are often referred to as �ATU-R� (�ADSL transceiver unit, remote,� i.e., located at the customer premises) and �ATU-C� (�ADSL transceiver unit, central office� i.e., located at the central office). Each modem includes a transmitter section for transmitting data and a receiver section for receiving data, and is of the discrete multitone type, i.e., the modem transmits data over a multiplicity of subchannels of limited bandwidth. Typically, the upstream or ATU-C modem transmits data to the downstream or ATU-R modem over a first set of subchannels, which are usually the higher-frequency subchannels, and receives data from the downstream or ATU-R modem over a second, usually smaller, set of subchannels, commonly the lower-frequency subchannels. By establishing a diagnostic link mode between the two modems, the systems and methods of this invention are able to exchange diagnostic and test information in a simple and robust manner.
DETAILED DESCRIPTION OF THE INVENTION For ease of illustration the following description will be described in relation to the CO receiving diagnostic and test information from the RT. In the exemplary embodiment, the systems and methods of this invention complete a portion of the normal modem initialization before entering into the diagnostic link mode. The systems and methods of this invention can enter the diagnostic link mode manually, for example, at the direction of a technician or a user after completing a portion of initialization. Alternatively, the systems and methods of this invention can enter the diagnostic link mode automatically based on, for example, a bit rate failure, a forward error correction or a CRC error during showtime, e.g., the normal steady state transmission mode, or the like. The transition into the diagnostic link mode is accomplished by transmitting a message from the CO modem to the RT modem indicating that the modems are to enter into the diagnostic link mode, as opposed to transitioning into the normal steady state data transmission mode. Alternatively, the transition into the diagnostic link mode is accomplished by transmitting a message from the RT modem to the CO modem indicating that the modems are to enter into the diagnostic link mode as opposed to transitioning into the normal steady state data transmission mode. For example, the transition signal uses an ADSL state transition to transition from a standard ADSL state to a diagnostic link mode state.
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