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1. (WO2018080729) METHODS AND APPARATUS SUPPORTING CONTROLLED TRANSMISSION AND RECEPTION OF MESSAGES

Pub. No.:    WO/2018/080729    International Application No.:    PCT/US2017/054406
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Sat Sep 30 01:59:59 CEST 2017
IPC: H04W 74/08
Applicants: QUALCOMM INCORPORATED
Inventors: ISLAM, Muhammad Nazmul
SUBRAMANIAN, Sundar
LI, Junyi
Title: METHODS AND APPARATUS SUPPORTING CONTROLLED TRANSMISSION AND RECEPTION OF MESSAGES
Abstract:
Methods and apparatus that support controlled transmission and directional reception of RTS and/or CTS messages, are described. Controlled transmission may include transmitting a same RTS message multiple times in the same direction and/or transmitting an RTS message with a length that is multiple times longer than a standard RTS message. In an aspect, a receiver may determine spatial directions of a plurality of transmitters including a first transmitter and at least one other transmitter, and may perform a beam sweep in the determined spatial directions for receiving one or more RTS messages. A transmitter may determine that a receiver is to perform a beam sweep in K different spatial directions, and may transmit a same RTS message for a data transmission K times in the same direction or an RTS message with a length approximately K times longer than a standard RTS message, during a duration of the beam sweep.