Methods and apparatus for interference coordinated transmission and reception in wireless networks
AssigneeApple Inc.
InventorsSeyed Reza Mir Ghaderi, Kee-Bong Song, Syed A. Mujtaba
Life of this patent
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Abstract
Methods and apparatus for interference coordination to improve transmission and reception performance within wireless networks. In one exemplary embodiment, a wireless transmitter transmits multiple transmissions over a determined time. The receiver receives the multiple transmissions and attempts to recover the transmitted signal. Because, the fading channel varies over time for each transmitter-receiver, by combining the received signals over multiple iterations, the signal of interest will be magnified, whereas interference effects will be suppressed.
Claims20
A method of interference management at a wireless device, the method comprising:
- by the wireless device:
- receiving up to a pre-determined number, N>1, of receive signals during a transmission period, each receive signal comprising (i) a sequential redundant transmission of a transmit signal sent from a remote transmitter and (ii) interference signals corresponding to simultaneous transmissions by the remote transmitter to at least one other wireless device;
- jointly processing the receive signals to decode the transmit signal;
- determining whether the transmit signal is successfully decoded;
- and
- sending a positive indication to the remote transmitter to stop redundant transmissions to the wireless device until a subsequent transmission period, when successfully decoding the transmit signal.
A wireless device comprising:
- a receiver configured to:
- receive up to a pre-determined number, N>1, of receive signals during a transmission period, each receive signal comprising (i) a sequential redundant transmission of a transmit signal sent from a remote transmitter and (ii) interference signals corresponding to simultaneous transmissions by the remote transmitter to at least one other wireless device,
- jointly process the receive signals to decode the transmit signal, and
- determine whether the transmit signal is successfully decoded;
- and
- a transmitter configured to:
- send a positive indication to the remote transmitter to stop redundant transmissions to the wireless device until a subsequent transmission period, when successfully decoding the transmit signal.
A method of interference management at a base station apparatus that includes a plurality of transmit antennas, the method comprising:
- by the base station apparatus:
- transmitting sequentially to a first wireless device a first set of up to a first pre-determined number, N>1, of redundant transmissions of a first transmit signal through a first transmit antenna of the plurality of transmit antennas during a transmission period;
- transmitting sequentially to a second wireless device a second set of up to a second pre-determined number, M>1, of redundant transmissions of a second transmit signal through a second transmit antenna of the plurality of transmit antennas during the transmission period;
- determining whether the first transmit signal is successfully decoded by the first wireless device;
- and
- stop transmitting the redundant transmissions of the first transmit signal to the first wireless device during a remainder of the transmission period, when the first wireless device successfully decodes the first transmit signal to reduce interference received by the second wireless device.
Dependencies are inferred from the claim text.