US5535242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for modem command processing during data transfer
Assignee: International Business Machines Corp
•
Filing: 1995-04-25
•
Granted: 1996-07-09
•
Expires: 2015-04-25
Abstract
Abstract A method and system are disclosed for permitting selected command sequences to be processed by a modem during data transfer operations. A preselected escape character is designated and inserted into a data stream to be applied to a modem in order to identify a selected command sequence which follows. A termination character is inserted into the data stream following the selected command sequence. Upon detection of the preselected escape character, the selected command sequence is coupled to a command processor within the modem and processed. In applications in which the modem is coupled between a data processing system and a cellular telephone communication channel, the selected command sequence may be utilized to transmit communication channel parameter status queries to a cellular telephone associated with the modem. In this manner, the Received Signal Strength Indicator (RSSI), bit error rate, or other indications of communication channel status may be queried. An identical technique may be utilized to transmit a response to each such query to the data processing system, permitting real time display of cellular communication channel status information during data transfer.
Inventors
- 👤 David J. Brigida
- 👤 Victor S. Moore
- 👤 Thomas K. Pate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:26
CPC Classifications
H; H04; H04B; H04B17/00; H04B17/20; H04B17/23; H04M; H04M11/00; H04M11/06; H04B17/30; H04B17/309; H04B17/318; H04L; H04L12/00; H04L12/28; H04L12/40; H04L12/407; H04L12/413; H04L9/00; H04L9/40; H04M11/066; H04W; H04W88/00; H04W88/02; H04W88/06
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
158 words
A method in a data processing system for enhancing the efficiency of operation of a modem coupled between a communication channel and said data processing system, said modem having a command processor, a data transfer mode and a command mode, said method comprising the steps of: coupling a stream of data from said data processing system to said modem while said modem is operating in said data transfer mode; selectively inserting within said stream of data a preselected escape character followed by a selected command sequence which initiates a communication channel status query; detecting said preselected escape character within said stream of data; and automatically processing said selected command sequence within said command processor of said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode and is directly connected to the data processing system such that communication channel status may be determined during data transfer.
Claim 2
Independent Claim
158 words
A method in a data processing system for enhancing the efficiency of operation of a modem coupled between a communication channel and said data processing system, said modem having a command processor, a data transfer mode and a command mode, said method comprising the steps of: coupling a stream of data from said data processing system to said modem while said modem is operating in said data transfer mode; selectively inserting within said stream of data a preselected escape character followed by a selected command sequence which initiates a communication channel status query; detecting said preselected escape character within said stream of data; and automatically processing said selected command sequence within said command processor of said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode and is directly connected to the data processing system such that communication channel status may be determined during data transfer.
Claim 3
Dependent Claim
101 words
The method in a data processing system for enhancing the efficiency of operation of a modem according to claim 1, further including the steps of: coupling a second stream of data from said modem to said data processing system while said modem is operating in said data transfer mode; selectively inserting within said second stream of data a preselected escape character followed by a response to said selected command sequence; and automatically processing said response within said data processing system in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode.
Claim 4
Dependent Claim
56 words
The method in a data processing system for enhancing the efficiency of operation of a modem according to claim 1, further including the step of detecting each occurrence of said preselected escape character within said stream of data not followed by a selected command sequence and inserting a second preselected escape character following each such occurrence.
Claim 5
Dependent Claim
40 words
The method in a data processing system for enhancing the efficiency of operation of a modem according to claim 1, further including the step of inserting within said stream of data a preselected termination character following said selected command sequence.
Claim 6
Dependent Claim
162 words
A data processing system for enhancing the efficiency of operation of a modem coupled between a communication channel and said data processing system, said modem having a command processor, a data transfer mode and a command mode, said data processing system comprising: means for coupling a stream of data from said data processing system to said modem while said modem is operating in said data transfer mode; means for selectively inserting within said stream of data a preselected escape character followed by a selected command sequence which initiates a communication channel status query; means for detecting said preselected escape character within said stream of data; and means for automatically processing said selected command sequence within said command processor of said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode and is directly connected to the data processing system such that communication channel status may be determined during data transfer.
Claim 7
Dependent Claim
162 words
A data processing system for enhancing the efficiency of operation of a modem coupled between a communication channel and said data processing system, said modem having a command processor, a data transfer mode and a command mode, said data processing system comprising: means for coupling a stream of data from said data processing system to said modem while said modem is operating in said data transfer mode; means for selectively inserting within said stream of data a preselected escape character followed by a selected command sequence which initiates a communication channel status query; means for detecting said preselected escape character within said stream of data; and means for automatically processing said selected command sequence within said command processor of said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode and is directly connected to the data processing system such that communication channel status may be determined during data transfer.
Claim 8
Dependent Claim
101 words
The data processing system for enhancing the efficiency of operation of a modem according to claim 5, further including: means for coupling a second stream of data from said modem to said data processing system while said modem is operating in said data transfer mode; means for selectively inserting within said second stream of data a preselected escape character followed by a response to said selected command sequence; and means for automatically processing said response within said data processing system in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode.
Claim 9
Dependent Claim
36 words
The data processing system for enhancing the efficiency of operation of a modem according to claim 5, further including means for inserting within said stream of data a preselected termination character following said selected command sequence.
References Cited (Backward Citations)
US3825905A
Cited
US4387440A
Cited
US4387440B1
Cited
US4549302A
Cited
US4718082A
Cited
US4922534A
Cited
US4926448A
Cited
US4928305A
Cited
US5170470A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-07-09 | 2000-01-08 | 2000-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-09 | 2004-01-08 | 2004-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-09 | 2008-01-08 | 2008-07-09 | $7700.00 | Window Closed / Lapsed |