Bandwidth-efficient wireless network modem
First Claim
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1. A method for polling and scheduling in a multiuser network that includes a plurality of bandwidth efficient modems configured to carry out a distributed coordination function (DCF) for providing best-effort delivery of asynchronous packet data, the method comprising:
- each modem detecting that one or more of the other modems included in the network are bandwidth efficient and therefore capable of an aggressive access protocol that exploits co-channel demodulation capabilities;
switching from a legacy protocol mode to the bandwidth efficient aggressive access protocol mode for at least one pair of communicating modems included in the network;
two or more modems simultaneously transmitting on a single channel requests-to-send (RTS) messages to a first set of destination modems;
simultaneously receiving clear-to-send (CTS) messages from the first set of destination modems at each of the requesting-to-send modems;
recovering each corresponding CTS message using co-channel demodulation capabilities of the corresponding requesting modem;
each requesting modem simultaneously transmitting its respective data on to the network; and
each corresponding destination modem recovering the corresponding data using its co-channel demodulation capabilities.
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Abstract
A modem that provides efficient use of wireless network bandwidth in the presence of multi-user interference and noise comprising a multi-user detection module (115), a data formatting module (120), a control processor (125) and a demultiplexer (135).
51 Citations
8 Claims
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1. A method for polling and scheduling in a multiuser network that includes a plurality of bandwidth efficient modems configured to carry out a distributed coordination function (DCF) for providing best-effort delivery of asynchronous packet data, the method comprising:
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each modem detecting that one or more of the other modems included in the network are bandwidth efficient and therefore capable of an aggressive access protocol that exploits co-channel demodulation capabilities; switching from a legacy protocol mode to the bandwidth efficient aggressive access protocol mode for at least one pair of communicating modems included in the network; two or more modems simultaneously transmitting on a single channel requests-to-send (RTS) messages to a first set of destination modems; simultaneously receiving clear-to-send (CTS) messages from the first set of destination modems at each of the requesting-to-send modems; recovering each corresponding CTS message using co-channel demodulation capabilities of the corresponding requesting modem; each requesting modem simultaneously transmitting its respective data on to the network; and each corresponding destination modem recovering the corresponding data using its co-channel demodulation capabilities. - View Dependent Claims (2, 4, 5, 6, 8)
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3. A method for polling and scheduling in a multiuser network that includes a plurality of bandwidth efficient modems configured to carry out a distributed coordination function (DCF) for providing best-effort delivery of asynchronous packet data, the method comprising:
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two or more terminals simultaneously transmitting on a single channel requests-to-send (RTS) messages to a first set of destination modems; simultaneously receiving clear-to-send (CTS) messages from the first set of destination modems at each of the requesting-to-send modems; recovering each corresponding CTS message using co-channel demodulation capabilities of the corresponding requesting modem; each requesting modem simultaneously transmitting its respective data on to the network; each corresponding destination modem recovering the corresponding data using its co-channel demodulation capabilities; each modem adaptively learning modes of operation of which each particular modem in the network is capable; and storing the learned modes of operation, wherein the learned modes of operation include a legacy protocol mode and a bandwidth efficient aggressive access protocol mode that exploits co-channel demodulation capabilities. - View Dependent Claims (7)
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Specification