BANDWIDTH EFFICIENT WIRELESS NETWORK MODEM
First Claim
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1. A modern which enables efficient use of bandwidth in a multiuser wireless network including a plurality of modems in the presence of interference and noise, the modem comprising:
- a multiuser detection module adapted to simultaneously demodulate and recover K wirelessly transmitted signals using co-channel demodulation;
a data formatting module operatively coupled to the multiuser detection module, and adapted to produce network data packets for at least one of the K recovered signals;
a control processor operatively coupled to the formatting module, and adapted to detect with which protocol mode the at least one of the K recovered signals was transmitted, and to enable a corresponding transmission mode including one of a legacy protocol mode and a bandwidth efficient aggressive access protocol mode that exploits co-channel demodulation capabilities of the modem; and
a demultiplexer operatively coupled to the data formatting module and the control processor, and adapted to select one of the recovered K wirelessly transmitted signals as a target signal intended for a user associated with the modem, where the selection is based on a control input from the control processor.
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Abstract
A modem that provides efficient use of wireless network bandwidth in the presence of multiuser interference and noise is disclosed. The modem design provides for compatibility with existing network hardware and protocols so that new efficient modems may be added to the network without removing installed hardware and software.
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Citations
8 Claims
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1. A modern which enables efficient use of bandwidth in a multiuser wireless network including a plurality of modems in the presence of interference and noise, the modem comprising:
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a multiuser detection module adapted to simultaneously demodulate and recover K wirelessly transmitted signals using co-channel demodulation; a data formatting module operatively coupled to the multiuser detection module, and adapted to produce network data packets for at least one of the K recovered signals; a control processor operatively coupled to the formatting module, and adapted to detect with which protocol mode the at least one of the K recovered signals was transmitted, and to enable a corresponding transmission mode including one of a legacy protocol mode and a bandwidth efficient aggressive access protocol mode that exploits co-channel demodulation capabilities of the modem; and a demultiplexer operatively coupled to the data formatting module and the control processor, and adapted to select one of the recovered K wirelessly transmitted signals as a target signal intended for a user associated with the modem, where the selection is based on a control input from the control processor. - View Dependent Claims (2, 3, 4)
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5. A method for polling and scheduling in a multiuser network that includes three or more bandwidth efficient modems, with at least one modem designated as a polling point coordinator access point (AP) element that operates as a global timer, the method comprising:
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receiving a beacon signal from the AP element that indicates frame start, the frame having an interval; monitoring current broadcasting activity of other modems included in the network so as to identify an open slot available for data transmission in a channel, where two or more modems can transmit in the channel at the same time; and in response to identifying an open slot and being next in a transmission queue, transmitting data in the open slot. - View Dependent Claims (6, 7, 8)
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Specification