BASE STATION APPARATUS, MOBILE STATION, RADIO COMMUNICATION SYSTEM, AND COMMUNICATION CONTROL METHOD

• US 20100118803A1
• Filed: 03/12/2008
• Published: 05/13/2010
• Est. Priority Date: 03/19/2007
• Status: Abandoned Application

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Umesh, Anil, Miki, Nobuhiko, Ishii, Hiroyuki
• Application Number:
  US12/531,445
• Publication Number:
  US 20100118803A1
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/1671 the supervisory signal being transmitted together with control information
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 1/1896 ARQ related signaling

Abstract

In a radio communication system including a mobile station and a base station apparatus communicating with the mobile station, the base station apparatus applies a scheduling scheme for assigning radio resources to mobile stations for each constant period, and the mobile station transmits a first signal to the base station apparatus in accordance with the assignment of the radio resources. The base station apparatus includes a decoding unit configured to decode the first signal, and a transmitting unit configured to transmit a control signal for retransmitting the first signal to the mobile station if the first signal has not been successfully received.

Claims

1. A base station apparatus in a radio communication system including a mobile station and the base station apparatus communicating with the mobile station, wherein the base station apparatus applies a scheduling scheme for assigning radio resources to mobile stations for each constant period, and wherein the mobile station transmits a first signal to the base station apparatus in accordance with the assignment of the radio resources, the base station apparatus comprising:

a decoding unit configured to decode the first signal; and

a transmitting unit configured to transmit a control signal for retransmitting the first signal to the mobile station if the first signal has not been successfully received.

2. The base station apparatus as claimed in claim 1, wherein the control signal comprises an uplink scheduling grant mapped into a downlink control channel.

3. The base station apparatus as claimed in claim 2, wherein the uplink scheduling grant includes a signal indicative of at least one of assignment information of uplink frequency resources, identification information, a data size, a modulation scheme and transmit power.

4. A mobile station in a radio communication system including the mobile station and a base station apparatus communicating with the mobile station, wherein the base station apparatus applies a scheduling scheme for assigning radio resources to mobile stations for each constant period, the mobile station comprising:

a transmitting unit configured to transmit a first signal to the base station apparatus in accordance with the assignment of the radio resources; and

a retransmitting unit configured to retransmit the first signal if a control signal for retransmitting the first signal is received from the base station apparatus.

5. The mobile station as claimed in claim 4, wherein the control signal comprises an uplink scheduling grant mapped into a downlink control channel.

6. The mobile station as claimed in claim 5, wherein the uplink scheduling grant includes a signal indicative of at least one of assignment information of uplink frequency resources, identification information, a data size, a modulation scheme and transmit power.

7. A radio communication system including a mobile station and a base station apparatus communicating with the mobile station,

wherein the base station apparatus applies a scheduling scheme for assigning radio resources to mobile stations for each constant period,

the mobile station comprising:

a transmitting unit configured to transmit a first signal to the base station apparatus in accordance with the assignment of the radio resources; and

a retransmitting unit configured to retransmit the first signal if a control signal for retransmitting the first signal is received from the base station apparatus, and

the base station apparatus comprising;

a decoding unit configured to decode the first signal; and

a transmitting unit configured to transmit the control signal for retransmitting the first signal to the mobile station if the first signal has not been successfully received.

8. A communication control method for use in a radio communication system including a mobile station and a base station apparatus communicating with the mobile station, wherein the base station apparatus applies a scheduling scheme for assigning radio resources to mobile stations for each constant period, the method comprising:

the mobile station transmitting a first signal to the base station apparatus in accordance with the assignment of the radio resources;

the base station apparatus decoding the first signal;

the base station apparatus transmitting a control signal for retransmitting the first signal to the mobile station if the first signal has not been successfully received; and

the mobile station retransmitting the first signal based on the control signal.