SYSTEM AND METHOD FOR SUPPORTING HIGHER-LAYER PROTOCOL MESSAGING IN AN IN-BAND MODEM
First Claim
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1. A method of acknowledging a source terminal data message from a destination terminal in an in-band communication system, the method comprising:
- transmitting a low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; and
transmitting a high layer application (HLMSG) signal, wherein the HLMSG signal is comprised of a second synchronization sequence followed by a transformed HLMSG message.
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Abstract
Acknowledging a source terminal data message from a destination terminal in an in-band communication system is disclosed. A first synchronization sequence followed by a low layer acknowledgement message and a second synchronization sequence followed by a high layer acknowledgement message is transmitted.
119 Citations
28 Claims
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1. A method of acknowledging a source terminal data message from a destination terminal in an in-band communication system, the method comprising:
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transmitting a low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; and transmitting a high layer application (HLMSG) signal, wherein the HLMSG signal is comprised of a second synchronization sequence followed by a transformed HLMSG message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus comprising:
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a transmitter configured to transmit signals from a destination terminal; a receiver configured to receive signals from a source terminal at the destination terminal; a start signal generator coupled to the transmitter and configured to generate a start signal; a NACK signal generator coupled to the transmitter and configured to generate a NACK signal; a data message detector coupled to the receiver and configured to detect a source terminal data message; a LLACK signal generator coupled to the transmitter and configured to generate a first synchronization sequence followed by an LLACK message; and a HLACK signal generator coupled to the transmitter and configured to generate a second synchronization sequence followed by a transformed HLACK message. - View Dependent Claims (13, 14)
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15. An apparatus comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being capable of executing the steps of; transmitting a low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; and transmitting a high layer application (HLMSG) signal, wherein the HLMSG signal is comprised of a second synchronization sequence followed by a transformed HLMSG message, wherein the transformed HLMSG message is a high layer acknowledgement (HLACK) message. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. An apparatus for acknowledging a source terminal data message from a destination terminal in an in-band communication system comprising:
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means for transmitting a low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; and means for transmitting a high layer application (HLMSG) signal, wherein the HLMSG signal is comprised of a second synchronization sequence followed by a transformed HLMSG message, wherein the transformed HLMSG message is a high layer acknowledgement (HLACK) message. - View Dependent Claims (24, 25, 26, 27)
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28. A processor readable medium for acknowledging a source terminal data message from a destination terminal in an in-band communication system, comprising instructions for:
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transmitting a start signal from the destination terminal, whereby the source terminal is constrained to respond in a first predetermined manner; discontinuing transmission of the start signal upon detection of a first received signal, wherein the first received signal indicates a successful reception of the start signal from the source terminal; transmitting a negative acknowledgement (NACK) signal from the destination terminal, whereby the source terminal is constrained to respond in a second predetermined manner; discontinuing transmission of the NACK signal upon successful reception of the source terminal data message; transmitting a low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; transmitting a high layer application (HLMSG) signal, wherein the HLMSG signal is comprised of a second synchronization sequence followed by a transformed HLMSG message, wherein the transformed HLMSG message is a high layer acknowledgement (HLACK) message; and discontinuing transmission of the LLACK signal upon detection of an uplink event.
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Specification