Wireless communication device and method for controlling beam to be transmitted

• US 8,526,886 B2
• Filed: 12/09/2011
• Issued: 09/03/2013
• Est. Priority Date: 06/19/2008
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Wu, Jianming, Taniguchi, Tomohiko
• Primary Examiner(s): Lam, Tuan T
• Application Number:
  US13/315,988
• Publication Number:
  US 20120077530A1
• Time in Patent Office: 634 Days
• Field of Search: None
• US Class Current: 455/63.4
• CPC Class Codes: H04B 7/0697 using spatial multiplexing

Abstract

A controller controls the direction of a beam to be transmitted toward a correspondent wireless communication device to transmit a first wireless signal to the correspondent wireless communication device, and controls the direction of the beam within a predetermined shift from the direction of the first wireless signal, thereby transmitting a second wireless signal at a first timing before or a second timing after the timing of the control for the first wireless signal.

Claims

1. A wireless communication device capable of controlling the direction of beams to be transmitted, the wireless communication device comprising:

an adaptive array antenna; and

a controller that controls the directions of the beams radiating from the adaptive array antenna, wherein

the controller controls the order of transmission of the beams toward at least three correspondent wireless communication devices based on the directions of the beams corresponding to the correspondent wireless communication devices,

the wireless communication devices include a first wireless communication device, a second wireless communication device, and a third wireless communication device, the first, second, and third wireless communication devices corresponding to a first direction, a second direction, and a third direction, respectively, and

the transmitted beams are directed, in sequence, to the first, second, and third directions where the shifted beam-width from the first direction to the second direction is less than the shifted beam-width from the first direction to the third direction.

2. The wireless communication device according to claim 1, wherein the shifted beam-width from the second direction to the third direction is less than the shifted beam-width from the first direction to the third direction.

3. A method for controlling a beam to be transmitted by a wireless communication device capable of controlling the direction of beams to be transmitted by an adaptive array antenna, the method comprising:

controlling the order of transmission of the beams toward at least three correspondent wireless communication devices based on the directions of the beams corresponding to the correspondent wireless communication devices, wherein

the wireless communication devices include a first wireless communication device, a second wireless communication device, and a third wireless communication device, the first, second, and third wireless communication devices corresponding to a first direction, a second direction, and a third direction, respectively, and

the transmitted beams are directed, in sequence, to the first, second, and third directions where the shifted beam-width from the first direction to the second direction is less than the shifted beam-width from the first direction to the third direction.