Method for controlling a modem connection in the event of disturbance

• US 5,903,602 A
• Filed: 05/23/1996
• Issued: 05/11/1999
• Est. Priority Date: 08/27/1993
• Status: Expired due to Term

• Current Assignee: Nokia Telecommunications Oy (Nokia Corporation)
• Original Assignee: Nokia Telecommunications Oy (Nokia Corporation)
• Inventors: Torkkel, Jari
• Primary Examiner(s): Bocure, Tesfaldet
• Application Number:
  US08/602,831
• Time in Patent Office: 1,083 Days
• Field of Search: 375/222, 375/219, 375/354, 375/357, 379/93.01
• US Class Current: 375/222
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Abstract

A method for controlling a connection, especially a wireless connection, between two modems in the event of disturbance, which includes initiating a so-called retrain procedure in the event of disturbance when either one of the modems receives a signal of unsatisfactory quality. In the retrain procedure, the modems transmit predetermined retrain signals to each other in order to achieve synchronism between them. For reliable and rapid disconnection of a connection, the progress of the retrain procedure is monitored, and every time the procedure is stuck in a state other than a data transmission state for a period of time longer than a predetermined limit, the modem is commanded to initiate a repetition of the start-up procedure by means of which the connection between the modems was originally established.

Claims

1. A method for controlling a wireless connection between two modems in the event of disturbance, comprising:

initiating a retrain procedure in the event of disturbance of a connection between the modems when either one of the modems receives a signal of unsatisfactory quality, in which retrain procedure the modems transmit predetermined retrain signals to each other in order to achieve synchronism between them

monitoring progress of the retrain procedure, and every time the procedure is stuck in a state other than a data transmission state for a period of time longer than a predetermined limit, commanding the respective modem to initiate a repetition of a start-up procedure by means of which the connection between the modems was originally established.

2. The method according to claim 1, wherein:

in practicing said commanding, if the number of commanded start-up procedures exceeds a predetermined limit, entirely disconnecting the connection between the modems.

3. The method according to claim 1, wherein:

in practicing said commanding, if the total time the procedure remains in a state other than a data transmission state exceeds a predetermined limit, entirely disconnecting the connection between the modems.

4. The method according to claim 1, wherein:

said monitoring progress of the retrain procedure includes controlling an initial state of the retrain procedure, which is a state other than a data transmission state.