WIRELESS COMMUNICATION METHOD, MOBILE STATION APPARATUS, WIRELESS COMMUNICATION SYSTEM AND INTEGRATED CIRCUIT

• US 20130051341A1
• Filed: 03/25/2011
• Published: 02/28/2013
• Est. Priority Date: 03/30/2010
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Suzuki, Shoichi, Nakashima, Daiichiro, Uemura, Katsunari
• Granted Patent: US 9,686,047 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/1835 Buffer management
• CPC Class Codes: H04L 5/0005 Time-frequency
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

To perform control of PUSCH retransmission efficiently in a wireless communication system where a mobile station apparatus and a base station apparatus communicate with each other using a plurality of downlink component carriers. In a mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers and a plurality of uplink component carriers, in case that the downlink component carrier corresponding to the uplink component carrier is set not to be used for downlink communication, the mobile station apparatus flushes HARQ buffers of the uplink component carrier associated with the downlink component carrier set not to be used for downlink communication.

Claims

1. A wireless communication method used for a mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers and a plurality of uplink component carriers,

in case that downlink component carrier corresponding to the uplink component carrier is set not to be used for downlink communication, the method comprising a step of flushing HARQ buffers of the uplink component carrier associated with the downlink component carrier set not to be used for downlink communication.

2. A mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers and a plurality of uplink component carriers, wherein

in case that the downlink component carrier corresponding to the uplink component carrier is set not to be used for downlink communication, the mobile station apparatus flushes HARQ buffers of the uplink component carrier associated with the downlink component carrier set not to be used for the downlink communication.

3. A wireless communication system where a mobile station apparatus and a base station apparatus communicate with each other using a plurality of downlink component carriers and a plurality of uplink component carriers, wherein

the mobile station apparatus,

in case that the downlink component carrier corresponding to the uplink component carrier is set not to be used for downlink communication, flushes HARQ buffers of the uplink component carrier associated with the downlink component carrier set not to be used for downlink communication, and

the base station apparatus

judges that, the mobile station apparatus, in case that having set the downlink component carrier corresponding to the uplink component carrier not to be used for downlink communication, has flushed HARQ buffers of the uplink component carrier associated with the downlink component carrier set not to be used for downlink communication.

4. An integrated circuit used for a mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers and a plurality of uplink component carriers, wherein

in case that the downlink component carrier for the uplink component carrier is set not to be used for downlink communication, the integrated circuit includes a function to flush HARQ buffers of the uplink component carrier associated with the downlink component carrier set not to be used for downlink communication.

5. A wireless communication method used for a mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers and a plurality of uplink component carriers,

in case that the downlink component carrier corresponding to the uplink component carrier is deactivated, the method comprising a step of flushing HARQ buffers of the uplink component carrier associated with the deactivated downlink component carrier.

6. The wireless communication method according to claim 5, further comprising a step of deactivating a downlink component carrier in case that notified by a command transmitted from the base station apparatus.

7. The wireless communication method according to claim 5, in case that a prescribed time has elapsed after activating a downlink component carrier based on a notification by a command transmitted from the base station apparatus, the method further comprising a step of deactivating the activated downlink component carrier.

8. The wireless communication method according to claim 5, in case that a prescribed time has elapsed after a physical downlink control channel transmitted from the base station apparatus was received by a downlink component carrier, the method further comprising a step of deactivating the downlink component carrier which received the physical downlink control channel.

9. A mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers and a plurality of uplink component carriers, wherein

in case that the downlink component carrier corresponding to the uplink component carrier is deactivated, the mobile station apparatus flushes HARQ buffers of the uplink component carrier associated with the deactivated downlink component carrier.

10. A wireless communication system where a mobile station apparatus and a base station apparatus communicate with each other using a plurality of downlink component carriers and a plurality of uplink component carriers, wherein

the mobile station apparatus,

in case that having deactivated said downlink component carrier corresponding to the uplink component carrier, flushes HARQ buffers of the uplink component carrier associated with the deactivated downlink component carrier, and

the base station apparatus

judges that the mobile station apparatus, in case that having deactivated the downlink component carrier corresponding to said uplink component carrier, has flushed HARQ buffers of the uplink component carrier associated with the deactivated downlink component carrier.

11. An integrated circuit used for a mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers and a plurality of uplink component carriers, wherein

in case that the downlink component carrier corresponding to the uplink component carrier is deactivated, the integrated circuit includes a function to flush HARQ buffers of the uplink component carrier associated with the deactivated downlink component carrier.

12. A wireless communication method used for a mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers,

in case that a downlink component carrier on which the mobile station apparatus is to receive a HARQ indicator corresponding to uplink data transmitted to the base station apparatus is deactivated, the method comprising a step of setting ACK without receiving the HARQ indicator.

13. A mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers, wherein

in case that a downlink component carrier on which the mobile station apparatus is to receive a HARQ indicator corresponding to uplink data transmitted to the base station apparatus is deactivated, the mobile station apparatus sets ACK without receiving the HARQ indicator.

14. A wireless communication system where a mobile station apparatus and a base station apparatus communicate with each other using a plurality of downlink component carriers, wherein

in case that a downlink component carrier on which the mobile station apparatus is to receive a HARQ indicator corresponding to uplink data which the mobile station apparatus transmitted to the base station apparatus is deactivated,

the mobile station apparatus sets ACK without receiving the HARQ indicator, and

the base station apparatus judges that the mobile station apparatus has set ACK without receiving the HARQ indicator.

15. An integrated circuit used for a mobile station apparatus which communicates with a base station apparatus using a plurality of downlink component carriers, wherein

in case that a downlink component carrier on which the mobile station apparatus is to receive a HARQ indicator corresponding to uplink data transmitted to the base station apparatus is deactivated, the integrated circuit includes a function for setting ACK without receiving the HARQ indicator.