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 an in-band low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; and
transmitting an in-band high layer application (HLMSG) signal, wherein the HLMSG signal is comprised of a second synchronization sequence followed by a transformed HLMSG message,wherein the second synchronization sequence is different than the first synchronization sequence sufficient to distinguish the LLACK message from the transformed HLMSG message without acknowledgement identifier bits.
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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.
103 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 an in-band low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; and transmitting an in-band high layer application (HLMSG) signal, wherein the HLMSG signal is comprised of a second synchronization sequence followed by a transformed HLMSG message, wherein the second synchronization sequence is different than the first synchronization sequence sufficient to distinguish the LLACK message from the transformed HLMSG message without acknowledgement identifier bits. - 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 in-band signals from a destination terminal; a receiver configured to receive in-band 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, the LLACK signal being an in-band signal; and a HLACK signal generator coupled to the transmitter and configured to generate a second synchronization sequence followed by a transformed HLMSG message, the HLACK signal being an in-band signal, wherein the second synchronization sequence is different than the first synchronization sequence sufficient to distinguish the LLACK message from the transformed HLMSG message without acknowledgement identifier bits. - 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 an in-band low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; and transmitting an in-band 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 wherein the second synchronization sequence is different than the first synchronization sequence sufficient to distinguish the LLACK message from the transformed HLMSG message without acknowledgement identifier bits. - 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 an in-band 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 an in-band 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 wherein the second synchronization sequence is different than the first synchronization sequence sufficient to distinguish the LLACK message from the transformed HLMSG message without acknowledgement identifier bits. - View Dependent Claims (24, 25, 26, 27)
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28. A non-transitory 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 an in-band low layer acknowledgement (LLACK) signal, wherein the LLACK signal is comprised of a first synchronization sequence followed by a LLACK message; transmitting an in-band 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, wherein the second synchronization sequence is different than the first synchronization sequence sufficient to distinguish the LLACK message from the transformed HLMSG message without acknowledgement identifier bits.
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Specification