WO2009011247A1 - Radio communication system, mobile station, and radio communication method - Google Patents

Radio communication system, mobile station, and radio communication method Download PDF

Info

Publication number
WO2009011247A1
WO2009011247A1 PCT/JP2008/062316 JP2008062316W WO2009011247A1 WO 2009011247 A1 WO2009011247 A1 WO 2009011247A1 JP 2008062316 W JP2008062316 W JP 2008062316W WO 2009011247 A1 WO2009011247 A1 WO 2009011247A1
Authority
WO
WIPO (PCT)
Prior art keywords
antenna
mobile station
radio communication
reference signal
base station
Prior art date
Application number
PCT/JP2008/062316
Other languages
French (fr)
Japanese (ja)
Inventor
Yasuyuki Kato
Wahoh Oh
Original Assignee
Sharp Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2009011247A1 publication Critical patent/WO2009011247A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • H04B7/061—Antenna selection according to transmission parameters using feedback from receiving side

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Provided is a radio communication system including: a mobile station having a plurality of antennas (15d, 15e); and a base station which performs radio communication with the mobile station. When switching an antenna, the system checks a radio propagation path state so as to decide whether to switch the antenna, thereby performing an appropriate antenna switching and an optimal scheduling. The mobile station which performs a radio communication with the base station includes: a mobile station side radio unit (15) which transmits and receives a radio signal to/from the base station; and a reference signal control unit (13). When the mobile station side radio unit (15) has received from the base station an antenna switching request signal indicating a request for switching the antenna previously used for transmitting the reference signal to another antenna, the reference signal control unit (13) controls the mobile station side radio unit (15) so as to transmit only the reference signal to the base station from an antenna different from the antenna which transmitted the reference signal previously.
PCT/JP2008/062316 2007-07-13 2008-07-08 Radio communication system, mobile station, and radio communication method WO2009011247A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007185048 2007-07-13
JP2007-185048 2007-07-13

Publications (1)

Publication Number Publication Date
WO2009011247A1 true WO2009011247A1 (en) 2009-01-22

Family

ID=40259585

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/062316 WO2009011247A1 (en) 2007-07-13 2008-07-08 Radio communication system, mobile station, and radio communication method

Country Status (1)

Country Link
WO (1) WO2009011247A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011001489A1 (en) * 2009-06-29 2011-01-06 富士通株式会社 Radio communication device, transmitting power controlling method, and communication quality transmitting method
WO2011016390A1 (en) * 2009-08-04 2011-02-10 シャープ株式会社 Wireless communication system, mobile station device, and base station device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10163938A (en) * 1996-12-04 1998-06-19 Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk Antenna changeover control system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10163938A (en) * 1996-12-04 1998-06-19 Y R P Ido Tsushin Kiban Gijutsu Kenkyusho:Kk Antenna changeover control system

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
MITSUBISHI ELECTRIC ET AL.: "Adaptive antenna switching with low sounding reference signal overhead", 3GPP RAN1#49BIS, R1-073067, 29 June 2007 (2007-06-29), XP050106722 *
MITSUBISHI ELECTRIC: "Comparison of closed-loop antenna selection with open-loop transmit diversity (antenna switching within a TTI", 3GPP RAN1#47BIS, RL-070523, 19 January 2007 (2007-01-19), XP050104550 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011001489A1 (en) * 2009-06-29 2011-01-06 富士通株式会社 Radio communication device, transmitting power controlling method, and communication quality transmitting method
JP5293819B2 (en) * 2009-06-29 2013-09-18 富士通株式会社 Wireless communication apparatus and transmission power control method
WO2011016390A1 (en) * 2009-08-04 2011-02-10 シャープ株式会社 Wireless communication system, mobile station device, and base station device
JP2011035785A (en) * 2009-08-04 2011-02-17 Sharp Corp Wireless communication system, mobile station apparatus, and base station apparatus
CN102474857A (en) * 2009-08-04 2012-05-23 夏普株式会社 Wireless communication system, mobile station device, and base station device

Similar Documents

Publication Publication Date Title
EP1890404A3 (en) Relay station, base station and communication system
HK1127176A1 (en) Wireless terminal in a wireless communications system that uses a multi- mode base station, and operation method thereof
CA2510659A1 (en) Communication system and communication terminal apparatus
GB0110125D0 (en) Radio communication system
WO2012081881A3 (en) Method for transmitting and method for receiving a channel state information reference signal in a distributed multi-node system
WO2012077989A3 (en) Channel status information feedback method and apparatus for a distributed antenna mobile communication system
WO2007142623A8 (en) Multi-antenna station with distributed antennas
WO2008099780A1 (en) Base station device, user device, and communication control method
ATE500658T1 (en) TERMINAL DEVICE, BASE STATION DEVICE AND COMMUNICATIONS SYSTEM
WO2010087623A2 (en) Method for controlling transmission power, and apparatus for same
WO2008084694A1 (en) Base station device, user device and method used in mobile communication system
WO2010093166A3 (en) Operation of terminal for multi-antenna transmission
WO2011118979A3 (en) Method in which user equipment transmits a signal in a distributed antenna system, and user equipment using same
WO2008099807A1 (en) Base station device, mobile station, radio communication system, and communication control method
WO2009054655A3 (en) Method for transmitting data of common control channel
TW200715651A (en) Optimized directional antenna system
WO2011062393A3 (en) Method and apparatus for performing contention-based uplink transmission in a wireless communication system
WO2009031572A1 (en) Communication device and communication method
WO2010050718A3 (en) Cooperative beamforming apparatus and method in wireless communication system
GB0519946D0 (en) Communication in dual protocol environments
WO2009001400A1 (en) Power control system in wireless communication
WO2008107995A1 (en) Wireless communication device, mobile wireless communication control method, and wireless station
JP2009239371A5 (en)
EP1681782A3 (en) Communication system, base station, radio network controller, and transmission power controlling method
WO2009017153A1 (en) Wireless communication terminal, wireless communication system and wireless communication method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08790953

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08790953

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP