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公开(公告)号：DE69331295D1
公开(公告)日：2002-01-24
申请号：DE69331295
申请日：1993-03-04
Applicant: IBM
Inventor： BRIGIDA DAVID JOSEPH , MOORE VICTOR STUART , ROBINSON JAMES EDWARD
Abstract: A method and system are disclosed for automatically selecting an optimum modem protocol in a distributed data processing system which includes a modem which supports multiple protocols which is coupled to a cellular communications system. Known cellular communications systems generate a Received Signal Strength Indicator (RSSI) and a Service Access Tone (SAT) which may be utilized by a cellular telephone to determine the amplitude of a received signal and to optimize a path through the cellular communication system for voice communications. The Service Access Tone (SAT) is generally utilized to control the "hand off" of a communication session to a new cell and provides an indication of the quality of the existing path through the cellular communication system. After initiating communication between a first modem and a second modem, the method and system of the present invention automatically determines the channel quality within the cellular communication system by utilizing the Received Signal Strength Indicator (RSSI) and the Service Access Tone (SAT). These signals are analyzed, in conjunction with the bit error rate of the dotting sequence transmitted by the answering modem, to achieve an indication of the quality of the cellular communications channel. In response to an analysis of these factors a particular protocol may be selected which is optimum for existing channel conditions.
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公开(公告)号：DE69330236T2
公开(公告)日：2001-10-11
申请号：DE69330236
申请日：1993-03-04
Applicant: IBM
Inventor： BRIGIDA DAVID JOSEPH , MOORE VICTOR STUART , PATE THOMAS KENT
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.
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公开(公告)号：BR9705094A
公开(公告)日：1999-06-29
申请号：BR9705094
申请日：1997-10-20
Applicant: IBM
Inventor： MOORE VICTOR STUART , JADE PRASHANTH , RAO ARUN MOHAN , WALTERS GLEN ROBERT
Abstract: A firewall isolates computer and network resources inside the firewall from networks, computers and computer applications outside the firewall. Typically, the inside resources could be privately owned databases and local area networks (LAN's), and outside objects could include individuals and computer applications operating through public communication networks such as the Internet. Usually, a firewall allows for an inside user or object to originate connection to an outside object or network, but does not allow for connections to be generated in the reverse direction; i.e. from outside in. The disclosed invention provides a special "tunneling" mechanism, operating on both sides of a firewall, for establishing such "outside in" connections when they are requested by certain "trusted" individuals or objects or applications outside the firewall. The intent here is to minimize the resources required for establishing "tunneled" connections (connections through the firewall that are effectively requested from outside), while also minimizing the security risk involved in permitting such connections to be made at all. The mechanism includes special tunneling applications, running on interface servers inside and outside the firewall, and a special table of "trusted sockets" created and maintained by the inside tunneling application. Entries in the trusted sockets table define objects inside the firewall consisting of special inside ports, a telecommunication protocol to be used at each port, and a host object associated with each port. Each entry is "trusted" in the sense that it is supposedly known only by individuals authorized to have "tunneling" access through the firewall from outside.
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公开(公告)号：DE69319790T2
公开(公告)日：1999-03-25
申请号：DE69319790
申请日：1993-05-11
Applicant: IBM
Inventor： JENNESS ROBERT VINCENT , MOORE VICTOR STUART
Abstract: An external antenna 20 for use with a mobile battery powered data processing terminal 12 is disclosed, the terminal including a radio frequency communication device 36, such as a cellular telephone transceiver. Multiple antenna elements are mounted within a D-shaped flexible tubular member 38 having a very low dielectric constant which is then affixed to the external surface of the data processing terminal, utilizing an adhesive on the flat surface thereof. The flexible tubular member is preferably mounted along at least two edges of the data processing terminal display module such that spatial or polarization diversity for the multiple antenna elements may be provided. A coaxial connector 21 is utilized to couple the multiple antenna elements to a radio frequency communication device within the data processing terminal. In this matter, an external antenna may be added to a battery powered data processing terminal in a manner which will protect the antenna without interfering with radio frequency transmission or reception while simultaneously providing additional protection for the data processing terminal.
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公开(公告)号：CA2087507C
公开(公告)日：1997-05-13
申请号：CA2087507
申请日：1993-01-18
Applicant: IBM
Inventor： BRIGIDA DAVID JOSEPH , MOORE VICTOR STUART , PATE THOMAS KENT
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.
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Patent Agency Ranking
公开(公告)号：MY127656A
公开(公告)日：2006-12-29
申请号：MYPI9704377
申请日：1997-09-19
Applicant: IBM
Inventor： JADE PRASHANTH , MOORE VICTOR STUART , RAO ARUN MOHAN , WALTERS GLEN ROBERT
IPC: G06F11/00 , G06F12/14 , G06F13/00 , G06F13/16 , G06F13/36 , H04L9/32 , H04L12/56 , H04L12/66 , H04L29/06
Abstract: A FIREWALL ISOLATES COMPUTER AND NETWORK RESOURCES INSIDE THE FIREWALL FROM NETWORKS, COMPUTERS AND COMPUTER APPLICATIONS OUTSIDE THE FIREWALL. TYPICALLY, THE INSIDE RESOURCES COULD BE PRIVATELY OWNED DATABASES AND LOCAL AREA NETWORKS (LAN’S), AND OUTSIDE OBJECTS COULD INCLUDE INDIVIDUALS AND COMPUTER APPLICATIONS OPERATING THROUGH PUBLIC COMMUNICATION NETWORKS SUCH AS THE INTERNET. USUALLY, A FIREWALL ALLOWS FOR AN INSIDE USER OR OBJECT TO ORIGINATE CONNECTION TO AN OUTSIDE OBJECT OR NETWORK, BUT DOES NOT ALLOW FOR CONNECTIONS TO BE GENERATED IN THE REVERSE DIRECTION; I.E. FROM OUTSIDE IN. THE DISCLOSED INVENTION PROVIDES A SPECIAL “TUNNELING” MECHANISM, OPERATING ON BOTH SIDES OF A FIREWALL (1), FOR ESTABLISHING SUCH “OUTSIDE IN” CONNECTIONS WHEN THEY ARE REQUESTED BY CERTAIN “TRUSTED” INDIVIDUALS OR OBJECTS OR APPLICATIONS OUTSIDE THE FIREWALL. THE INTENT HERE IS TO MINIMIZE THE RESOURCES REQUIRED FOR ESTABLISHING “TUNNELED” CONNECTIONS (CONNECTIONS THROUGH THE FIREWALL THAT ARE EFFECTIVELY REQUESTED FROM OUTSIDE), WHILE ALSO MINIMIZING THE SECURITY RISK INVOLVED IN PERMITTING SUCH CONNECTIONS TO BE MADE AT ALL. THE MECHANISM INCLUDES SPECIAL TUNNELING APPLICATIONS, RUNNING ON INTERFACE SERVERS (2, 3) INSIDE AND OUTSIDE THE FIREWALL, AND A SPECIAL TABLE OF “TRUSTED SOCKETS” CREATED AND MAINTAINED BY THE INSIDE TUNNELING APPLICATION. ENTRIES IN THE TRUSTED SOCKETS TABLE DEFINE OBJECTS INSIDE THE FIREWALL CONSISTING OF SPECIAL INSIDE PORTS, A TELECOMMUNICATION PROTOCOL TO BE USED AT EACH PORT, AND A HOST OBJECT ASSOCIATED WITH EACH PORT. EACH ENTRY IS “TRUSTED” IN THE SENSE THAT IT IS SUPPOSEDLY KNOWN ONLY BY INDIVIDUALS AUTHORIZED TO HAVE “TUNNELING” ACCESS THROUGH THE FIREWALE FROM OUTSIDE. THESE APPLICATIONS USE THE TABLE TO EFFECT CONNECTIONS THROUGH THE FIREWALL IN RESPONSE TO OUTSIDE REQUESTS IDENTIFYING VALID TABLE ENTRIES. (FIG. 3)
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公开(公告)号：CA2269544C
公开(公告)日：2004-12-28
申请号：CA2269544
申请日：1997-10-02
Applicant: IBM
Inventor： MOORE VICTOR STUART , RAO ARUN MOHAN , WALTERS GLEN ROBERT , JADE PRASHANTH
Abstract: A firewall isolates computer and network resources inside the firewall from networks, computers and computer applications outside the firewall. Usually, a firewall allows for an inside user or object to originate connection to an outside object or network, but does not allow for connections to be generated in the reverse direction; i.e. from outside in. The disclosed invention provides a special "tunnelling" mechanism, operating on both sides of a firewall, for establishing such "outside in" connections when they are requested by certain "trusted" individuals or objects or applications outside the firewall. The mechanism includes special tunnelling applications, running on interface servers inside and outside the firewall, and a special table of "trusted sockets" created and maintained by the inside tunnelling application.
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公开(公告)号：DE69330236D1
公开(公告)日：2001-06-28
申请号：DE69330236
申请日：1993-03-04
Applicant: IBM
Inventor： BRIGIDA DAVID JOSEPH , MOORE VICTOR STUART , PATE THOMAS KENT
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.
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公开(公告)号：DE69231533T2
公开(公告)日：2001-05-31
申请号：DE69231533
申请日：1992-08-13
Applicant: IBM
Inventor： AMES RICHARD NORMAN , MOORE VICTOR STUART
Abstract: Methods and apparatus are set forth which enable a data communications network (1) to perform decentralised uplink network control functions (decentralised away from the centralised general communications controller (GCC) level of the network hierarchy); (2) to minimise, or in some cases eliminate, the overhead expended in making power lever (signal strength) determinations and assessments at both the GCC and base station levels of the network hierarchy (for the purpose of managing uplink communications); and (3) to allow individual subscriber radios (terminals) to dynamically determine the most desirable base station to communicate with when exchanging information a host computer via a shared RF communication channel (the link between a terminal and the base station). Additionally, an illustrative radio frequency data communication network, built in accordance with the teachings of the invention as a modified version of an existing network, is described where the modified network incorporates the aforementioned methods and apparatus.
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公开(公告)号：DE69231533D1
公开(公告)日：2000-11-30
申请号：DE69231533
申请日：1992-08-13
Applicant: IBM
Inventor： AMES RICHARD NORMAN , MOORE VICTOR STUART
Abstract: Methods and apparatus are set forth which enable a data communications network (1) to perform decentralised uplink network control functions (decentralised away from the centralised general communications controller (GCC) level of the network hierarchy); (2) to minimise, or in some cases eliminate, the overhead expended in making power lever (signal strength) determinations and assessments at both the GCC and base station levels of the network hierarchy (for the purpose of managing uplink communications); and (3) to allow individual subscriber radios (terminals) to dynamically determine the most desirable base station to communicate with when exchanging information a host computer via a shared RF communication channel (the link between a terminal and the base station). Additionally, an illustrative radio frequency data communication network, built in accordance with the teachings of the invention as a modified version of an existing network, is described where the modified network incorporates the aforementioned methods and apparatus.
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