# US 2010/0167773 A1 · Mobile Station And Radio Base Station

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- Number: US 2010/0167773 A1
- Document ID: US20100167773A1
- Status: Published application
- Kind: A1
- Application number: 12/724,007
- Filed: 2010-03-15
- Published: 2010-07-01
- Earliest claimed: 2007-10-16
- Assignees: Fujitsu Limited
- Inventors: Yoshiyuki Oota
- Web page: https://patentgrep.com/patent/US20100167773A1

## CPC

- H04L 1/0026: {Transmission of channel quality indication}
- H04B 17/309: Measuring or estimating channel quality parameters
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04B: TRANSMISSION

## Abstract

A mobile station includes a reception quality generating unit that generates the reception quality based on a reception quality measured for data transmitted after transmission of a preamble signal. The mobile station is in a mobile communication system in which, a radio base station transmits the data after transmission of the preamble signal and, after transmission of a signal and before transmission of a subsequent preamble signal from the radio base station, the mobile station transmits to the radio base station, reception quality of the signal transmitted from the radio base station, whereby a transmission parameter for data transmitted to the mobile station after transmission of the subsequent preamble signal can be changed.

## Claims

### Claim 1

A mobile station in a mobile communication system in which, a radio base station transmits data after transmission of a preamble signal and, after transmission of a signal and before transmission of a subsequent preamble signal from the radio base station, the mobile station transmits to the radio base station, reception quality of the signal transmitted from the radio base station, whereby a transmission parameter for data transmitted to the mobile station after transmission of the subsequent preamble signal can be changed, the mobile station comprising:
a reception quality generating unit that generates the reception quality based on a reception quality measured for the data transmitted after transmission of the preamble signal.

### Claim 2 (depends on 1)

The mobile station according to claim 1, wherein
the reception quality generating unit, upon generating the reception quality, uses both the reception quality measured for the data transmitted after transmission of the preamble signal and a reception quality measured for the preamble signal.

### Claim 3 (depends on 2)

The mobile station according to claim 2, wherein
the reception quality generating unit, upon generating the reception quality, uses the reception quality measured for the data transmitted after transmission of the preamble signal based on a pilot signal transmitted after transmission of the preamble signal.

### Claim 4 (depends on 1)

The mobile station according to claim 1, wherein
the data is data transmitted to the mobile station.

### Claim 5 (depends on 4)

The mobile station according to claim 4, wherein
the reception quality generating unit interpolates a reception quality of data transmitted to another mobile station, based on a reception quality of data transmitted to the mobile station.

### Claim 6 (depends on 1)

The mobile station according to claim 1, wherein
the data is data transmitted to all mobile stations that communicate with the radio base station.

### Claim 7

A radio base station that repeatedly carries out a cycle of transmitting data after transmission of a preamble signal and subsequently receiving a signal from a mobile station, the radio base station comprising:
a reception quality measuring unit that measures a reception quality of a signal from the mobile station during a reception period in which the signal from the mobile station is received; and
a control unit that controls a transmission parameter applied to data transmitted after transmission of a preamble signal following the reception period, based on the reception quality measured by the reception quality measuring unit.

### Claim 8 (depends on 7)

The radio base station according to claim 7, wherein
the reception quality measuring unit measures a reception quality of data received from the mobile station, based on a pilot signal received from the mobile station.

### Claim 9 (depends on 7)

The radio base station according to claim 7, wherein
the reception quality measuring unit interpolates a reception quality of a missing signal based on a reception quality acquired by measuring a reception quality of a signal from the mobile station, and controls the transmission parameter based on a reception quality acquired by the measurement and on a reception quality acquired by the interpolation.