Method and apparatus for quick modem reconnect
First Claim
1. A method of reducing time for use by a first modem to reconnect to a second modem via a communication channel, said method comprising the steps of:
- receiving a first digital impairment learning sequence from said second modem over said communication channel;
determining first one or more digital impairment attributes of said communication channel based on analyzing said first digital impairment learning sequence;
interrupting said communication channel;
terminating said interrupting;
receiving an signal point sequence from said second modem;
determining second one or more digital impairment attributes of said communication channel based on analyzing said signal point sequence; and
initializing said first modem with said one or more parameters to reconnect to said second modem if said first one or more digital impairment attributes are similar to corresponding said second one or more digital impairment attributes.
1 Assignment
0 Petitions
Accused Products
Abstract
A quick startup procedure for a modem system utilizes known characteristics of a previously established communication channel to reduce the initialization period associated with subsequent connections over the same channel. In response to the establishment of a call, the modem devices determine whether the quick connect protocol is supported. If so, then the called modem transmits a modified answer tone to the calling modem. The calling modem analyzes the signal received in response to the modified answer tone to determine whether characteristics of the current channel are similar to stored characteristics associated with a previous connection over the same channel. If a channel “match” is found, then the modem devices carry out a quick initialization routine that eliminates, abbreviates, or modifies a number of procedures or protocols that are carried out in conventional modem startup processes. The general quick startup techniques may also be applied in the context of a quick reconnect procedure that can be performed in response to a temporary pausing or disconnecting of the data modem mode.
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Citations
26 Claims
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1. A method of reducing time for use by a first modem to reconnect to a second modem via a communication channel, said method comprising the steps of:
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receiving a first digital impairment learning sequence from said second modem over said communication channel; determining first one or more digital impairment attributes of said communication channel based on analyzing said first digital impairment learning sequence; interrupting said communication channel; terminating said interrupting; receiving an signal point sequence from said second modem; determining second one or more digital impairment attributes of said communication channel based on analyzing said signal point sequence; and initializing said first modem with said one or more parameters to reconnect to said second modem if said first one or more digital impairment attributes are similar to corresponding said second one or more digital impairment attributes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A computer readable medium including computer software program executable by a processor in a first modem for implementing a method of reducing time for use by the first modem to reconnect with a second modem over a communication channel, said computer software program comprising:
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code for receiving a first digital impairment learning sequence from said second modem over said communication channel; code for determining first one or more digital impairment attributes of said communication channel based on analyzing said first digital impairment learning sequence; code for interrupting said communication channel; code for terminating said interrupting; code for receiving an signal point sequence from said second modem; code for determining second one or more digital impairment attributes of said communication channel based on analyzing said signal point sequence; and code for initializing said first modem with said one or more parameters to reconnect to said second modem if said first one or more digital impairment attributes are similar to corresponding said second one or more digital impairment attributes. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification