Diagnostic methods and systems for multicarrier modems

H - Electricity – 04 – L

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Details

H04L 1/24 (2006.01) H04B 3/46 (2006.01) H04L 1/00 (2006.01) H04L 1/18 (2006.01) H04L 5/14 (2006.01) H04M 3/30 (2006.01)

Patent

CA 2394491

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.

L'invention concerne un mode de transmission d'information diagnostique entré par un système de liens diagnostiques, suite à la détection d'un déclencheur tel que le dépassement d'un seuil d'erreurs ou la direction de l'utilisateur. Ce mode de transmission d'information diagnostique permet à deux modems d'échanger des informations de diagnostic et/ou de test qui, sinon, ne pourraient pas être échangées pendant une communication normale. Ledit mode de transmission d'information diagnostique est déclenché par la transmission d'un message de mode de lien diagnostique de déclenchement à un modem de réception accompagné d'un contrôle de redondance cyclique (CRC). Le modem de réception détermine, sur la base du CRC, l'existence d'un canal de communication robuste. Dans l'affirmative, les deux modems peuvent déclencher un échange d'informations de diagnostic et/ou de test. Dans le cas contraire, la puissance de transmission du modem de transmission est augmentée et le message de mode de lien diagnostique de déclenchement est retransmis au modem de réception, tant que le CRC n'est pas déterminé comme étant correct.

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