Radio communication method in radio communication system, terminal apparatus, base station apparatus, and radio communication system

• US 8,600,313 B2
• Filed: 09/29/2010
• Issued: 12/03/2013
• Est. Priority Date: 03/25/2008
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ito, Akira
• Primary Examiner(s): Jackson, Blane J
• Application Number:
  US12/893,186
• Publication Number:
  US 20110021226A1
• Time in Patent Office: 1,161 Days
• Field of Search: 455/69, 455/561, 455/562.1, 455/93, 455/102, 455/103, 455/115.1, 375/295, 375/298
• US Class Current: 455/69
• CPC Class Codes: H04L 1/0025 Transmission of mode-switching indication
• CPC Class Codes: H04L 27/0008 arrangements for allowing a transmitter or receiver to use more than one type of modulation negotiating modulation type for two-way transmission paths H04L5/1453
• CPC Class Codes: H04L 27/2614 Peak power aspects
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04W 52/288 taking into account the usage mode, e.g. hands-free, data transmission, telephone
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

A radio communication method in a radio communication system which performs radio communication between a terminal apparatus and a base station apparatus, the radio communication method including: selecting one of a first transmission method or a second transmission method on the basis of transmission power of transmission signal transmitted from the terminal apparatus, in the base station apparatus; and transmitting the transmission signal to the base station apparatus by the selected first or second transmission method, in the terminal apparatus.

Claims

1. A radio communication method in a radio communication system which performs radio communication between a terminal apparatus and a base station apparatus, the radio communication method comprising:

selecting a first transmission method if the terminal apparatus transmits transmission signal by MIMO or selecting a second transmission method if the terminal apparatus transmits the transmission signal regardless of MIMO, in the base station apparatus; and

transmitting the transmission signal to the base station apparatus by the selected first or second transmission method, in the terminal apparatus.

2. The radio communication method according to claim 1, wherein PAPR of the first transmission method is larger than PAPR of the second transmission method.

3. A terminal apparatus for performing radio communication with a base station apparatus, the terminal apparatus comprising:

a reception unit which receives from the base station apparatus transmission method selection information indicating that a first transmission method is selected if the terminal apparatus transmits transmission signal by MIMO or a second transmission method is selected if the terminal apparatus transmits the transmission signal regardless of MIMO; and

a transmission unit which transmits the transmission signal to the base station apparatus by the first or second transmission method based on the transmission method selection information.

4. The radio communication method according to claim 3, wherein PAPR of the first transmission method is larger than PAPR of the second transmission method.

5. A base station apparatus for performing radio communication with a terminal apparatus, the base station apparatus comprising:

a selection unit which selects a first transmission method if the terminal apparatus transmits transmission signal by MIMO or selects a second transmission method if the terminal apparatus transmits the transmission signal regardless of MIMO; and

a transmission unit which transmits transmission method selection information indicating the selected first or second transmission method to the terminal apparatus,

wherein the terminal apparatus transmits the transmission signal by the selected first or second transmission method.

6. The radio communication method according to claim 5, wherein PAPR of the first transmission method is larger than PAPR of the second transmission method.

7. A radio communication system, comprising:

a terminal apparatus; and

a base station apparatus, wherein

radio communication is performed between the terminal apparatus and the base station apparatus,

the base station apparatus includes;

a selection unit which selects a first transmission method if the terminal apparatus transmits transmission signal by MIMO, or selects a second transmission method if the terminal apparatus transmits the transmission signal regardless of MIMO; and

a transmission unit which transmits transmission method selection information indicating the selected first or second transmission method, and

the terminal apparatus includes;

a reception unit which receives the transmission method selection information; and

a transmission unit which transmits the transmission signal to the base station apparatus by the first or second transmission method based on the transmission method selection information.

8. The radio communication method according to claim 7, wherein PAPR of the first transmission method is larger than PAPR of the second transmission method.