Wireless communication method, base station, and receiving terminal

• US 7,263,389 B2
• Filed: 10/20/2005
• Issued: 08/28/2007
• Est. Priority Date: 05/23/2002
• Status: Expired due to Fees

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Hayashi, Takahiro, Ishikawa, Yoshihiro
• Primary Examiner(s): Eng; George
• Assistant Examiner(s): Torres; Marcos L
• Application Number:
  US11/253,735
• Publication Number:
  US 20060030346A1
• Time in Patent Office: 677 Days
• Field of Search: 455/562.1, 455/561, 455/550.1, 455/429, 455450-453, 455446-448, 455/25, 455/574, 4553431-3436, 455/434, 455/515, 455/127.5, 370328-329, 370/334, 370/338, 342/368, 342/367
• US Class Current: 455/574
• CPC Class Codes: H04W 16/28 using beam steering
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 52/0206 in access points, e.g. base stations access point devices per se H04W88/08
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless communication method includes the steps of: calculating a transmission block number-related condition necessary for enabling a receiving terminal to receive all the blocks of broadcast control channel information based on the total number of the blocks and a transmission block number; calculating a rotation angular velocity-related condition based on the foregoing condition, a block unit time, and a coverage angle; and controlling a first directional antenna to rotate a beam at a rotation angular velocity decided based on the condition relating to the rotation angular velocity of the beam.

Claims

1. A wireless communication method in which a receiving terminal receives broadcast control channel information having a plurality of blocks, the broadcast control channel information being transmitted by rotation of a beam transmitted from a directional antenna of a base station, the wireless communication method comprising the steps of:

receiving the broadcast control channel information in the case where the directional antenna has transmitted the broadcast control channel information based on a condition necessary for receiving all the blocks of the broadcast control channel information;

calculating reception-not-ready timing based on a reception period and timing when the receiving terminal receives a block of the broadcast control channel information during the reception period, the reception-not-ready timing indicating timing when the receiving terminal cannot receive a block of the broadcast control channel information, the reception period indicating an interval between the time points when the receiving terminal receives the broadcast control channel information; and

controlling the receiving terminal not to perform an operation for receiving the broadcast control channel information during the reception-not-ready timing,

wherein in the controlling a power supply unit is controlled not to supply power to a receiving unit of the receiving terminal during the reception-not-ready timing.

2. A receiving terminal for receiving broadcast control channel information having a plurality of blocks, the broadcast control channel information being transmitted by rotation of a beam transmitted from a directional antenna of a base station, the receiving terminal comprising:

a receiver for receiving the broadcast control channel information in a case where the directional antenna has transmitted the broadcast control channel information based on a condition necessary for receiving all the blocks of the broadcast control channel information;

a calculator for calculating reception-not-ready timing indicating timing when the receiver cannot receive a block of the broadcast control channel information based on a reception period and timing when the receiver receives a block of the broadcast control channel information during the reception period, the reception period indicating an interval between the time points when the receiver receives the broadcast control channel information; and

a reception controller for controlling the receiver not to receive the broadcast control channel information during the reception-not-ready timing,

wherein the reception controller controls a power supply unit not to supply power to the receiving during the reception-not-ready timing.