Method and system for providing communication between standard terminal equipment using a remote communication unit
First Claim
1. A method of communicating between a first terminal equipment unit and a second terminal equipment unit using a mobile unit and a base station each capable of digital communications, said first terminal equipment unit producing digital data including time sensitive messages intended for said second terminal equipment unit, comprising the steps of:
- receiving at said mobile unit said digital data comprising a first time sensitive message from said first terminal equipment unit;
recognizing said first time sensitive message, converting said first time sensitive message into a time insensitive message, and substituting said time insensitive message for said first time sensitive message within said digital data to produce modified digital data;
packetizing at said mobile unit said modified digital data;
modulating at said mobile unit said packetized modified digital data;
transmitting from said mobile unit said modulated packetized modified digital data on a wireless link;
receiving at said base station said transmitted modulated packetized modified digital data;
demodulating at said base station said received modulated packetized modified digital data to produce a copy of said packetized modified digital data;
monitoring at said base station said copy of said packetized modified digital data for packets containing errors;
requesting by said base station repetition of an erroneously received packet;
retransmitting from said mobile unit an original packet corresponding to said erroneously received packet;
receiving at said base station said retransmitted original packet corresponding to said erroneously received packet;
demodulating at said base station said original packet corresponding to said erroneously received packet to produce a copy of said original packet;
inserting at said base station in place of said erroneously received packet said copy of said original packet to produce a copy of said modified digital data; and
recognizing within said copy of said modified digital data said time insensitive message, converting said time insensitive message into said first time sensitive message, and substituting said first time sensitive message for said time insensitive message within said cow of said modified digital data to produce a copy of said digital data.
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Accused Products
Abstract
An apparatus and method of providing communications between standard unmodified terminal equipment over a telephone link that includes a digital wireless link. The digital wireless link introduces substantial time variable delay. In order to pass time sensitive messages over the link, time sensitive messages are recognized and translated into time insensitive messages for transmission over the wireless link. The time insensitive messages indicate the information contained in the time sensitive messages and in the timing of the time sensitive messages. At the receiving end, the time insensitive messages are recognized and the time sensitive messages reconstructed with the appropriate timing.
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Citations
17 Claims
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1. A method of communicating between a first terminal equipment unit and a second terminal equipment unit using a mobile unit and a base station each capable of digital communications, said first terminal equipment unit producing digital data including time sensitive messages intended for said second terminal equipment unit, comprising the steps of:
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receiving at said mobile unit said digital data comprising a first time sensitive message from said first terminal equipment unit; recognizing said first time sensitive message, converting said first time sensitive message into a time insensitive message, and substituting said time insensitive message for said first time sensitive message within said digital data to produce modified digital data; packetizing at said mobile unit said modified digital data; modulating at said mobile unit said packetized modified digital data; transmitting from said mobile unit said modulated packetized modified digital data on a wireless link; receiving at said base station said transmitted modulated packetized modified digital data; demodulating at said base station said received modulated packetized modified digital data to produce a copy of said packetized modified digital data; monitoring at said base station said copy of said packetized modified digital data for packets containing errors; requesting by said base station repetition of an erroneously received packet; retransmitting from said mobile unit an original packet corresponding to said erroneously received packet; receiving at said base station said retransmitted original packet corresponding to said erroneously received packet; demodulating at said base station said original packet corresponding to said erroneously received packet to produce a copy of said original packet; inserting at said base station in place of said erroneously received packet said copy of said original packet to produce a copy of said modified digital data; and recognizing within said copy of said modified digital data said time insensitive message, converting said time insensitive message into said first time sensitive message, and substituting said first time sensitive message for said time insensitive message within said cow of said modified digital data to produce a copy of said digital data. - View Dependent Claims (3, 4, 5, 6, 7, 8)
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2. A telephone modem system having a wireless link, comprising:
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a mobile unit for receiving a stream of standard digital data from a terminal equipment unit and for transmitting an information signal wherein said mobile unit comprises; a protocol stack for receiving said stream of standard digital data, recognizing within said stream of standard digital data a time sensitive message, and providing a set of data packets corresponding to said stream of digital data wherein said time sensitive message is replaced with a representative time insensitive message; and a radio modulator for receiving said set of data packets, modulating said set of data packets for transmission, and for producing said information signal; a wireless link for conveying said information signal; a base station for receiving said information signal, said base station comprising; a radio modulator/demodulator for receiving said information signal from said wireless link, demodulating said information signal, and producing a first estimate of said set of data packets; and a radio link protocol unit for receiving said first estimate of said set of data packets, for monitoring said first estimate of set of data packets, for requesting retransmission of an erroneously received data packet, and producing said copy of said set of data packets. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A system for providing communication between a first and a second standard terminal equipment units, comprising:
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a mobile unit protocol stack having an input coupled to said first terminal equipment unit and an output wherein said mobile unit protocol stack receives a digital signal from said mobile unit protocol stack input and processes said digital signal to produce a delay insensitive data packet signal at said mobile unit protocol stack output; a mobile unit radio modulator having an input coupled to said mobile unit protocol stack output and an output coupled to a wireless link wherein said mobile unit radio modulator modulates said delay insensitive data packet signal and provides at said mobile unit output a modulated delay insensitive packet signal; a base station radio link demodulator having an input coupled to said wireless link and an output wherein said base station radio link demodulator demodulates said modulated delay insensitive packet signal from said mobile unit to produce an error adulterated copy of said delay insensitive data packet signal at said base station radio link demodulator output; a base station radio link protocol unit having an input coupled to said base station radio link demodulator output and having an output wherein said base station radio link protocol unit monitors said error adulterated copy of said delay insensitive data packets and requests repetition said mobile unit protocol stack of corrupted packets within said error adulterated copy of said delay insensitive data packets from to produce an error free copy of said delay insensitive data packets at said base station radio link protocol unit output; a protocol stack having an input coupled to said base station radio link protocol unit output and having an output wherein said protocol stack processes said error free copy of said delay insensitive data packets to produce therefrom a copy of said digital signal from said first terminal equipment at said protocol stack output; a modem having an input coupled to said protocol stack output and an output wherein said modem processes said copy of said digital signal to produce analog signal tones at said modem output; and a telephone network having an input coupled to said modem output and an output coupled to said second terminal equipment unit wherein said telephone network conveys said analog signal tones to said second terminal equipment unit. - View Dependent Claims (17)
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Specification