Radio terminal apparatus and reception operation control program thereof

• US 7,379,749 B2
• Filed: 05/02/2006
• Issued: 05/27/2008
• Est. Priority Date: 07/19/2001
• Status: Expired due to Term

• Current Assignee: Hera Wireless S.A. (Fineur International S.A.)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Doi, Yoshiharu, Nakao, Seigo, Miyata, Takeo, Ito, Tadayoshi
• Primary Examiner(s): Kincaid, Lester G.
• Assistant Examiner(s): Figueroa, Marisol
• Application Number:
  US11/415,070
• Publication Number:
  US 20060194542A1
• Time in Patent Office: 756 Days
• Field of Search: 455/525, 455/552.1, 455/553.1, 455/562.1, 455/561, 455/63.1
• US Class Current: 455/525
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 21/28 Combinations of substantially independent non-interacting antenna units or systems multiple beam H01Q25/00
• CPC Class Codes: H04B 7/04 using two or more spaced independent antennas

Abstract

A base station transmits information in a downlink signal that identifies whether the base station is an adaptive array base station. If a terminal capable of performing diversity reception determines that a terminal to be connected is an adaptive array base station, it stops to perform diversity reception and set an antenna used for an uplink signal transmission to be used for an immediately following reception among a plurality of antennas (11, 12). Thus, a reception effectively utilizing transmission directivity from the adaptive array base station is attained, and interference wave can be reduced. These process are executed with software by DSP (18).

Claims

1. A radio terminal apparatus in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting a signal containing information that identifies a type of transmission directivity control, said radio terminal apparatus comprising:

determination section configured for receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining a type of transmission directivity control based on said information; and

selection section configured for selecting a reception operation mode for receiving a signal from the radio base station in accordance with the determined type of transmission directivity control.

2. A method for controlling a reception operation in a radio terminal apparatus in a mobile communication system, said mobile communication system including a plurality of radio base stations, each of said plurality of radio base stations transmitting a signal containing information that identifies a type of transmission directivity control, said method comprising the steps of:

a determination step of receiving a signal from a radio base station to be connected among said plurality of radio base stations, and determining a type of transmission directivity control based on information contained in the received signal; and

a selection step of selecting a reception operation mode for receiving a signal from the radio base station in accordance with the determined type of transmission directivity control.