Radio communication system, base station apparatus, mobile station apparatus and radio communication method

Patent metadata

Field	Value
Publication number	US-10080228-B2
Application number	US-201615073462-A
Country	US
Kind code	B2
Filing date	Mar 17, 2016
Priority date	Feb 4, 2010
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

It is realized to transmit a reference signal for channel estimation a predetermined number of times with one signaling. In a radio communication system including a base station apparatus and a mobile station apparatus, the base station apparatus transmits a radio resource control signal including information indicating a number of times of transmission of the reference signal for channel estimation to the mobile station apparatus, and transmits a physical downlink control channel including information indicating transmission of the reference signal to the mobile station apparatus, and the mobile station apparatus transmits the reference signal to the base station apparatus until a number of times of transmission of the reference signal reaches the number of times of transmission, according to information indicating the number of times of transmission, which is included in the radio resource control signal, when the information indicating transmission of the reference signal is included in the physical downlink control channel.

First claim

The invention claimed is:

1. A mobile station apparatus comprising:
reception circuitry configured to:
receive a first radio resource control signal including first information on a parameter set for a sounding reference signal; and
receive a second radio resource control signal including second information on whether or not antenna selection for transmission of the sounding reference signal is enabled; and

transmission circuitry configured to:
transmit the sounding reference signal on multiple antennas based on the first information; wherein

the transmission circuitry is configured to:
determine simultaneous transmission of the sounding reference signal on the multiple antennas, in a first case that a first parameter for the simultaneous transmission is included in the parameter set; and
select one antenna of the multiple antennas based on a second parameter, the second parameter indicating a periodicity for the sounding reference signal and the second parameter included in the parameter set, in a second case that the second information indicates the antenna selection is enabled,
the selected one antenna used for the transmission of the sounding reference signal.

2. A base station apparatus comprising:
transmission circuitry configured to:
transmit a first radio resource control signal including first information on a parameter set for a sounding reference signal; and
transmit a second radio resource control signal including second information on whether or not antenna selection for transmission of the sounding reference signal is enabled; and

reception circuitry configured to:
receive the sounding reference signal on the multiple antennas based on the first information; wherein

the reception circuitry is configured to:
receive the sounding reference signal transmitted simultaneously on the multiple antennas, in a first case that a first parameter for the simultaneous transmission is included in the parameter set; and
receive the sounding reference signal transmitted on a selected one antenna of the multiple antennas, the one antenna selected by a mobile station apparatus based on a second parameter, the second parameter indicating a periodicity for the sounding reference signal and the second parameter included in the parameter set, in a second case that second information indicates the antenna selection is enabled.

3. A communication method for a mobile station apparatus, comprising:
receiving a first radio resource control signal including first information on a parameter set for a sounding reference signal;
receiving a second radio resource control signal including second information on whether or not antenna selection for transmission of the sounding reference signal is enabled; and
transmitting the sounding reference signal on the multiple antennas based on the first information; wherein
in a first case that a first parameter for the simultaneous transmission is included in the parameter set,
determining simultaneous transmission of the sounding reference signal on the multiple antennas; and
in a second case that the second information indicates the antenna selection is enabled, selecting one antenna of the multiple antennas based on a second parameter, the second parameter included in the parameter set,
the selected one antenna used for the transmission of the sounding reference signal.

4. A communication method for a base station apparatus, comprising:
transmitting a first radio resource control signal including first information on a parameter set for a sounding reference signal;
transmitting a second radio resource control signal including second information on whether or not antenna selection for transmission of the sounding reference signal is enabled; and
receiving the sounding reference signal on the multiple antennas based on the first information; wherein
receive the sounding reference signal transmitted simultaneously on the multiple antennas, in a first case that a first parameter is a first parameter for the simultaneous transmission included in the parameter set; and
receiving the sounding reference signal transmitted on a selected one antenna of the multiple antennas, the one antenna selected by a mobile station apparatus based on a second parameter, the second parameter included in the parameter set, in a second case that the second information indicates the antenna selection is enabled.

Assignees

• Sharp Kk

Inventors

• Ouchi Wataru
• Aiba Tatsushi
• Suzuki Shoichi

Classifications

• H04W72/20

  Control channels or signalling for resource management · CPC title

• H04L5/0053

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04L5/0048

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04B1/713 Primary

  using frequency hopping · CPC title

• H04L5/0012

  Hopping in multicarrier systems · CPC title