EP0565229A2
Expired / Lapsed
EP
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Method and system for modem command processing during data transfer
Assignee: International Business Machines Corp
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Filing: 1993-03-04
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Granted: —
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Expires: 2013-03-04
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 Joseph Brigida
- 👤 Victor Stuart Moore
- 👤 Thomas Kent Pate
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 11:23
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: 14
Claim 1
Independent Claim
103 words
A method for operating a modem coupled between a communication channel and a data processing system, said modem having 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; inserting within said stream of data a preselected escape character followed by a selected command sequence; and automatically processing said selected command sequence within said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode.
Claim 2
Dependent Claim
42 words
The method 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 3
Dependent Claim
28 words
The method according to Claim 1 or 2, further including the step of inserting within said stream of data a preselected termination character following said selected command sequence.
Claim 4
Dependent Claim
90 words
The method according to Claim 1, 2, or 3, 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 5
Dependent Claim
93 words
A method according to Claim 1, comprising the steps of: periodically inserting within said stream of data a preselected escape character followed by a selected communication channel parameter status query; automatically processing each of said selected communication channel parameter status queries within said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode; and transmitting a response to each of said selected communication channel parameter status queries from said modem to said data processing system in response to said processing thereof.
Claim 6
Dependent Claim
84 words
The method according to Claim 5, wherein said step of transmitting a response to each of said selected communication channel parameter status queries from said modem to said data processing system comprises 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; and selectively inserting within said second stream of data a preselected escape character followed by a response to a selected communication channel parameter status query.
Claim 7
Dependent Claim
41 words
The method according to Claim 5 or 6, wherein said data processing system includes a display device and wherein said method further includes the step of displaying said response to a selected communication channel parameter status query utilizing said display device.
Claim 8
Dependent Claim
32 words
The method according to Claim 5, 6, or 7, further including the step of inserting within said stream of data a preselected termination character following each selected communication channel parameter status query.
Claim 9
Dependent Claim
106 words
Apparatus comprising a modem coupled between a communication channel and a data processing system, said modem having 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; means for automatically processing said selected command sequence within said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode.
Claim 10
Dependent Claim
24 words
Appartus according to Claim 9, further including means for inserting within said stream of data a preselected termination character following said selected command sequence.
Claim 11
Dependent Claim
91 words
Apparatus according to Claim 9 or 10, 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 12
Dependent Claim
156 words
A data processing system for monitoring communication channel parameters during transfer of data utilizing a modem coupled between said communication channel and said data processing system, said modem having 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 periodically inserting within said stream of data a preselected escape character followed by a selected communication channel parameter status query; means for automatically processing each of said selected communication channel parameter status queries within said modem in response to a detection of said preselected escape character while said modem continues to operate in said data transfer mode; and means for transmitting a response to each of said selected communication channel parameter status queries from said modem to said data processing system in response to said processing thereof.
Claim 13
Dependent Claim
57 words
The data processing system for monitoring communication channel parameters during transfer of data utilizing a modem according to Claim 12, wherein said communication channel comprises a cellular telephone communication channel and wherein at least one of said selected communication channel parameter status queries comprises a query of Received Signal Strength Indicator from said cellular telephone communication channel.
Claim 14
Dependent Claim
56 words
The data processing system for monitoring communication channel parameters during transfer of data utilizing a modem according to Claim 12, wherein said communication channel comprises a cellular telephone communication channel and wherein at least one of said selected communication channel parameter status queries comprises a query of bit error rate from said cellular telephone communication channel.
References Cited (Backward Citations)
No citation records indexed.
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