WIRELESS COMMUNICATION DEVICE, SIGNAL RELAY METHOD, AND SIGNAL ALLOCATION METHOD

• US 20120120867A1
• Filed: 08/04/2010
• Published: 05/17/2012
• Est. Priority Date: 08/05/2009
• Status: Active Grant

• Current Assignee: Sovereign Peak Ventures, LLC (Dominion Harbor Enterprises, LLC)
• Original Assignee: Panasonic Corporation (Panasonic Holdings Corporation)
• Inventors: Horiuchi, Ayako, Nakao, Seigo, Yuda, Yasuaki, Imamura, Daichi
• Granted Patent: US 8,804,601 B2
• Time in Patent Office: Days
• US Class Current: 370/315
• CPC Class Codes: H04B 7/155 Ground-based stations H04B7/204 takes precedence
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/1829 Arrangements specially adapted for the receiver end
• CPC Class Codes: H04L 1/1867 Arrangements specially adapted for the transmitter end
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04W 28/10 Flow control between communication endpoints
• CPC Class Codes: H04W 84/047 using dedicated repeater stations

Abstract

To flexibly change subframes of a backhaul link and an access link. A wireless communication device according to the present invention is for relaying a signal between a base station and a mobile station, including: a receiver that receives the signal from the base station or the mobile station; a transmitter that transmits the signal to the base station or the mobile station; and a changeover unit that switches an operation mode to a receiving mode for receiving the signal from the base station or the mobile station, or a transmitting mode for transmitting the signal to the base station or the mobile station, wherein the changeover unit switches from the transmitting mode to the receiving mode in a subframe set to an MBSFN subframe by the wireless communication device among subframes subsequent to a subframe in which a NACK for requiring retransmission by the base station is transmitted.

Claims

1. :

A wireless communication device for relaying a signal between a base station and a mobile station, the wireless communication device comprising;

a receiver that is configured to receive the signal from the base station or the mobile station;

a transmitter that is configured to transmit the signal to the base station or the mobile station; and

a changeover unit that is configured to switch an operation mode to a reception mode for receiving the signal from the base station or the mobile station, or a transmission mode for transmitting the signal to the base station or the mobile station, wherein

the changeover unit is configured to switch the operation mode from the transmission mode to the reception mode in a subframe set to an MBSFN subframe by the wireless communication device among subframes subsequent to a subframe in which a NACK for requiring a retransmission of the base station is transmitted.

2. :

The wireless communication device according to claim 1, wherein

the wireless communication device is configured to notify the base station of a subframe to which no data is allocated to the mobile station in the subframe in which the NACK for requiring the retransmission of the base station is transmitted.

3. :

The wireless communication device according to claim 1, wherein

the changeover unit is configured to switch the operation mode from the transmission mode to the reception mode when an amount of data transmitted from the base station is larger than a predetermined threshold value, in the subframe set to the MBSFN subframe by the wireless communication device among subframes subsequent to the subframe in which the NACK for requiring the retransmission of the base station is transmitted.

4. :

The wireless communication device according to claim 1, wherein

the changeover unit is configured to switch the operation mode from the transmission mode to the reception mode when an acceptable delay amount of data transmitted from the base station is smaller than a predetermined threshold value, in the subframe set to the MBSFN subframe by the wireless communication device among subframes subsequent to the subframe in which the NACK for requiring the retransmission of the base station is transmitted.

5. :

A wireless communication device that communicates with a mobile station through a relay station, the wireless communication device comprising;

a receiver that is configured to receive a signal from the relay station or the mobile station; and

an allocation unit that is configured to allocate a signal directed to the relay station in a subframe set to an MBSFN subframe by the relay station among subframes subsequent to a subframe in which the wireless communication device receives a NACK for requiring a retransmission from the relay station.

6. :

A signal relay method for relaying a signal between a base station and a mobile station, the signal relay method comprising;

switching from a transmission mode for transmitting the signal to the base station or the mobile station to a reception mode for receiving the signal from the base station or the mobile station in a subframe set to an MBSFN subframe among subframes subsequent to a subframe in which a NACK for requiring a retransmission of the base station is transmitted.

7. :

A signal allocation method for communicating with a mobile station through a relay station, the signal allocation method comprising;

allocating a signal directed to the relay station in a subframe set to an MBSFN subframe by the relay station among subframes subsequent to a subframe in which a NACK for requiring a retransmission from the relay station is received.