Nec Corporation

Shahram Shahsavari

Mohammad Ali Khojastepour

Methods for transmitting data include sending a first probing packet using a first scanning beam, selected from a set of scanning beams. Feedback about the first probing packet is determined. A second probing packet is sent using a second scanning beam, selected from the set of scanning beams based on the determined feedback about the first probing packet. Feedback about the second probing packet is determined. A data transmission beam is determined based on the set of scanning beams and the received feedback about the first probing packet and the second probing packet. Data is transmitted using an antenna that is configured according to the determined transmission beam.

Interactive beam alignment with delayed feedback

A computer-implemented method is provided for finding a data transmission beam from an Access Point (AP) to a User Equipment (UE) in a communication system. The method includes selecting a probing beam from a set of probing beams. The method further includes sending a plurality of probing packets from the AP to the UE using a dedicated probing beam selected for each probing packet from among the set of probing beams. The method also includes receiving feedback from the UE regarding the plurality of probing packets. The method additionally includes computing the data transmission beam based on the received feedback and the set of probing beams.

Multi-user beam alignment and optimality of class of exhaustive search algorithms in multi-path environment

Systems and methods for robust beam tracking and data communication data are provided. The method includes dividing, by a base station, time into frames each having two phases, a location probing phase and a data communication phase. In the location probing phase, the base station uses a fractional search policy to localize a mobile device by transmitting multiple probing packets over different time-slots and updates information about a location of the mobile device. In the data communication phase, the base station communicates with the mobile device while expanding a beamwidth to compensate for possible mobility of the mobile device.

Robust beam tracking and data communication in millimeter-wave mobile networks

A method for establishing communication links in a millimeter wave network is presented. The method includes determining an active communication link between first and second devices, the first device transmitting probing packets to the second device, employing a beam search technique to locate narrow beams by triggering the first device to adjust its transmission pattern to cover a fraction of an angular uncertainty region (AUR) at a beginning of a time-slot, and adjusting transmission coefficients of the first device based on a response received from the second device such that if the second device receives a probing packet, the second device sends an acknowledgment packet to the first device and the first device updates the AUR such that the AUR is set to a probed angular interval, and if the second device does not receive the probing packet, the first device updates the AUR to a complementary part of the probed interval.

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Brooklyn, NY, United States of America

Shahram Shahsavari