Method and system of wireless device discovery in a wireless network employing directional antennas

摘要

A wireless device (100) communicates in a wireless network, and executes a wireless device discovery process to discover other wireless devices (100) in the wireless network. In the wireless device discovery process, the wireless device (100) sets its antenna pattern to have an omnidirectional antenna pattern (202), and transmits a first packet (300) using the omnidirectional antenna pattern (202). The first packet (300) comprises a packet preamble sequence (310) formed by repeating each sample of a synchronization sequence N times (N>1). The remainder (320) of the first packet (300) is formed by spreading each sample thereof with a spreading factor P (P>1). For normal data communications, the wireless device (100) sets the antenna pattern to have a directional antenna pattern (204), and transmits a second packet using the directional antenna pattern (204).

主权项

1. A method of communication by a wireless device in a wireless network, the wireless device including a transmitter and a receiver, the method comprising:
setting an antenna pattern of the wireless device to have an omnidirectional antenna pattern; transmitting a first packet using the omnidirectional antenna pattern, wherein transmitting the first packet includes transmitting a preamble sequence of the first packet by repeating each sample of a synchronization sequence N times (N>1), and transmitting a remainder of the first packet by spreading each sample with a spreading factor P (P>1), said preamble sequence having a frequency spectrum with a bandwidth BWNB and said remainder having a frequency spectrum with a bandwidth BWWB, where BWNB