Method and apparatus for scheduling in a wireless communication system
A method and apparatus are provided for configuring subframes in a wireless communication system. A user equipment (UE) receives an uplink-downlink configuration from a base station. The uplink-downlink configuration indicates each of a plurality of subframes in a frame to any one of a downlink subframe, a special subframe and an uplink subframe. The special subframe includes a downlink pilot time slot (DwPTS), a guard period (GP) and an uplink pilot time slot (UpPTS). The UE receives frame configuration information from the base station and configures each of the plurality of subframes in the frame to any one of a downlink subframe, a special subframe and an uplink subframe based on the uplink-downlink configuration and the frame configuration information. The UE communicates with the base station using the configured subframes.
1. A method for configuring subframes in a wireless communication system, the method performed by a user equipment (UE) and comprising:
receiving an uplink-downlink configuration from a base station,
wherein the uplink-downlink configuration indicates each of a plurality of subframes in a frame to any one of a downlink subframe, a special subframe and an uplink subframe, and
wherein the special subframe includes a downlink pilot time slot (DwPTS), a guard period (GP) and an uplink pilot time slot (UpPTS);
receiving frame configuration information from the base station;
configuring each of the plurality of subframes in the frame to any one of a downlink subframe, a special subframe and an uplink subframe based on the uplink-downlink configuration and the frame configuration information; and
communicating with the base station using the configured subframes,
wherein a subframe indicated as a downlink subframe or a special subframe by the uplink-downlink configuration cannot be indicated as an uplink subframe by the frame configuration information, and
wherein a subframe indicated as an uplink subframe by the uplink-downlink configuration can be indicated as a downlink subframe by the frame configuration information.
2. The method of claim 1 , wherein the uplink-downlink configuration is received through a radio resource control (RRC) message.
3. The method of claim 1 , wherein the uplink-downlink configuration indicates any one of uplink-downlink configurations included in the below table:
Uplink-downlink
Subframe number
configuration
0
1
2
3
4
5
6
7
8
9
0
D
S
U
U
U
D
S
U
U
U
1
D
S
U
U
D
D
S
U
U
D
2
D
S
U
D
D
D
S
U
D
D
3
D
S
U
U
U
D
D
D
D
D
4
D
S
U
U
D
D
D
D
D
D
5
D
S
U
D
D
D
D
D
D
D
6
D
S
U
U
U
D
S
U
U
D.
4. The method of claim 1 , wherein the frame configuration information is received in a first subframe of the frame.
5. The method of claim 1 , wherein if the frame consists of 10 subframes and is indexed from 0 to 9 in sequence, subframes configured to a downlink subframe in the frame comprise a subframe # 0 and a subframe # 5 .
6. The method of claim 5 , wherein if the frame consists of 10 subframes and is indexed from 0 to 9 in sequence, subframes configured to a special subframe in the frame comprise a subframe # 1 .
7. A user equipment (UE) comprising:
a radio frequency (RF) unit configured to transmit and receive a radio signal; and
a processor operably coupled with the RF unit,
wherein the processor is configured to:
control the RF unit to receive an uplink-downlink configuration from a base station,
wherein the uplink-downlink configuration indicates each of a plurality of subframes in a frame to any one of a downlink subframe, a special subframe and an uplink subframe, and
wherein the special subframe includes a downlink pilot time slot (DwPTS), a guard period (GP) and an uplink pilot time slot (UpPTS),
control the RF unit to receive frame configuration information from the base station,
configure each of the plurality of subframes in the frame to any one of a downlink subframe, a special subframe and an uplink subframe based on the uplink-downlink configuration and the frame configuration information, and
control the RF unit to communicate with the base station using the configured subframes,
wherein a subframe indicated as a downlink subframe or a special subframe by the uplink-downlink configuration cannot be indicated as an uplink subframe by the frame configuration information, and
wherein a subframe indicated as an uplink subframe by the uplink-downlink configuration can be indicated as a downlink subframe by the frame configuration information.
8. The UE of claim 7 , wherein the uplink-downlink configuration is received through a radio resource control (RRC) message.
9. The UE of claim 7 , wherein the uplink-downlink configuration indicates any one of uplink-downlink configurations included in the below table:
Uplink-downlink
Subframe number
configuration
0
1
2
3
4
5
6
7
8
9
0
D
S
U
U
U
D
S
U
U
U
1
D
S
U
U
D
D
S
U
U
D
2
D
S
U
D
D
D
S
U
D
D
3
D
S
U
U
U
D
D
D
D
D
4
D
S
U
U
D
D
D
D
D
D
5
D
S
U
D
D
D
D
D
D
D
6
D
S
U
U
U
D
S
U
U
D.
10. The UE of claim 7 , wherein the frame configuration information is received in a first subframe of the frame.
11. The UE of claim 7 , wherein if the frame consists of 10 subframes and is indexed from 0 to 9 in sequence, subframes configured to a downlink subframe in the frame comprise a subframe # 0 and a subframe # 5 .
12. The UE of claim 7 , wherein if the frame consists of 10 subframes and is indexed from 0 to 9 in sequence, subframes configured to a special subframe in the frame comprise a subframe # 1 .