Method and apparatus for allocating dynamic resources of integrated access and backhaul nodes in wireless communication system
The disclosure relates to a communication method and system for converging a 5 th -Generation (5G) communication system for supporting higher data rates beyond a 4 th -Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The disclosure discloses a method and a device for allocating resources of an IAB node.
1. A method performed by an integrated access and backhaul (IAB) node including a distributed unit (DU) and a mobile termination (MT) in a wireless communication system, the method comprising:
receiving, by the MT, downlink control information (DCI) for identifying a slot format from at least one slot format; and
communicating, by the MT, in a slot based on the slot format,
wherein one slot includes 14 orthogonal frequency division multiplexing (OFDM) symbols with indexes from 0 to 13,
wherein the at least one slot format is configured based on a first set of slot formats and a second set of slot formats, as defined by the following tables:
first set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
D
D
D
D
D
D
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
D
D
D
D
F
D
D
D
D
D
D
D
D
D
D
D
D
F
F
D
D
D
D
D
D
D
D
D
D
D
F
F
F
D
D
D
D
D
D
D
D
D
D
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
U
F
F
F
F
F
F
F
F
F
F
F
F
U
U
F
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
U
U
U
U
U
U
U
U
D
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
F
F
F
F
F
F
F
F
F
F
F
D
F
F
F
F
F
F
F
F
F
F
F
F
U
D
D
F
F
F
F
F
F
F
F
F
F
F
U
D
D
D
F
F
F
F
F
F
F
F
F
F
U
D
F
F
F
F
F
F
F
F
F
F
F
U
U
D
D
F
F
F
F
F
F
F
F
F
F
U
U
D
D
D
F
F
F
F
F
F
F
F
F
U
U
D
F
F
F
F
F
F
F
F
F
F
U
U
U
D
D
F
F
F
F
F
F
F
F
F
U
U
U
D
D
D
F
F
F
F
F
F
F
F
U
U
U
D
D
D
D
D
D
D
D
D
D
D
D
F
U
D
D
D
D
D
D
D
D
D
D
D
F
F
U
D
D
D
D
D
D
D
D
D
D
F
F
F
U
D
D
D
D
D
D
D
D
D
D
D
F
U
U
D
D
D
D
D
D
D
D
D
D
F
F
U
U
D
D
D
D
D
D
D
D
D
F
F
F
U
U
D
F
U
U
U
U
U
U
U
U
U
U
U
U
D
D
F
U
U
U
U
U
U
U
U
U
U
U
D
D
D
F
U
U
U
U
U
U
U
U
U
U
D
F
F
U
U
U
U
U
U
U
U
U
U
U
D
D
F
F
U
U
U
U
U
U
U
U
U
U
D
D
D
F
F
U
U
U
U
U
U
U
U
U
D
F
F
F
U
U
U
U
U
U
U
U
U
U
D
D
F
F
F
U
U
U
U
U
U
U
U
U
D
D
D
F
F
F
U
U
U
U
U
U
U
U
D
D
D
D
D
D
D
D
D
F
F
F
F
U
D
D
D
D
D
D
F
F
F
F
F
F
U
U
D
D
D
D
D
D
F
F
U
U
U
U
U
U
D
D
D
D
D
F
U
D
D
D
D
D
F
U
D
D
F
U
U
U
U
D
D
F
U
U
U
U
D
F
U
U
U
U
U
D
F
U
U
U
U
U
D
D
D
D
F
F
U
D
D
D
D
F
F
U
D
D
F
F
U
U
U
D
D
F
F
U
U
U
D
F
F
U
U
U
U
D
F
F
U
U
U
U
D
F
F
F
F
F
U
D
F
F
F
F
F
U
D
D
F
F
F
F
U
D
D
F
F
F
F
U
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
U
U
U
D
D
D
D
D
D,
second set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
U
F
F
F
F
F
F
F
F
F
F
F
F
D
U
U
F
F
F
F
F
F
F
F
F
F
F
D
U
U
U
F
F
F
F
F
F
F
F
F
F
D
U
F
F
F
F
F
F
F
F
F
F
F
D
D
U
U
F
F
F
F
F
F
F
F
F
F
D
D
U
U
U
F
F
F
F
F
F
F
F
F
D
D
U
F
F
F
F
F
F
F
F
F
F
D
D
D
U
U
F
F
F
F
F
F
F
F
F
D
D
D
U
U
U
F
F
F
F
F
F
F
F
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
F
D
U
U
U
U
U
U
U
U
U
U
U
F
F
D
U
U
U
U
U
U
U
U
U
U
F
F
F
D
U
U
U
U
U
U
U
U
U
U
U
F
D
D
U
U
U
U
U
U
U
U
U
U
F
F
D
D
U
U
U
U
U
U
U
U
U
F
F
F
D
D
U
F
D
D
D
D
D
D
D
D
D
D
D
D
U
U
F
D
D
D
D
D
D
D
D
D
D
D
U
U
U
F
D
D
D
D
D
D
D
D
D
D
U
F
F
D
D
D
D
D
D
D
D
D
D
D
U
U
F
F
D
D
D
D
D
D
D
D
D
D
U
U
U
F
F
D
D
D
D
D
D
D
D
D
U
F
F
F
D
D
D
D
D
D
D
D
D
D
U
U
F
F
F
D
D
D
D
D
D
D
D
D
U
U
U
F
F
F
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
F
F
F
F
D
U
U
U
U
U
U
F
F
F
F
F
F
D
D
U
U
U
U
U
U
F
F
D
D
D
D
D
D,
wherein, in the first set of slot formats and the second set of slot formats, D is downlink symbol, U is uplink symbol, and F is flexible symbol, and
wherein, for a downlink symbol which is configured as a soft type, the DU performs transmission in the downlink symbol in case that the MT does not perform transmission in the downlink symbol.
2. The method of claim 1 , wherein each of the MT and the DU is separately configured with its own slot format.
3. The method of claim 1 , wherein a slot format for the DU is configured by F1 application protocol (F1AP) signaling.
4. The method of claim 1 , wherein the MT of the IAB node is controlled by a DU of an upper IAB node to receive scheduling of transmitting and receiving data.
5. A method performed by a base station including a central unit (CU) and a distributed unit (DU) in a wireless communication system, the method comprising:
transmitting, to an integrated access and backhaul (IAB) node, downlink control information (DCI) for identifying a slot format from at least one slot format for a mobile termination (MT) of the IAB node; and
communicating in a slot based on the slot format,
wherein one slot includes 14 orthogonal frequency division multiplexing (OFDM) symbols with indexes from 0 to 13,
wherein the at least one slot format is configured based on a first set of slot formats and a second set of slot formats, as defined by the following tables:
first set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
D
D
D
D
D
D
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
D
D
D
D
F
D
D
D
D
D
D
D
D
D
D
D
D
F
F
D
D
D
D
D
D
D
D
D
D
D
F
F
F
D
D
D
D
D
D
D
D
D
D
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
U
F
F
F
F
F
F
F
F
F
F
F
F
U
U
F
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
U
U
U
U
U
U
U
U
D
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
F
F
F
F
F
F
F
F
F
F
F
D
F
F
F
F
F
F
F
F
F
F
F
F
U
D
D
F
F
F
F
F
F
F
F
F
F
F
U
D
D
D
F
F
F
F
F
F
F
F
F
F
U
D
F
F
F
F
F
F
F
F
F
F
F
U
U
D
D
F
F
F
F
F
F
F
F
F
F
U
U
D
D
D
F
F
F
F
F
F
F
F
F
U
U
D
F
F
F
F
F
F
F
F
F
F
U
U
U
D
D
F
F
F
F
F
F
F
F
F
U
U
U
D
D
D
F
F
F
F
F
F
F
F
U
U
U
D
D
D
D
D
D
D
D
D
D
D
D
F
U
D
D
D
D
D
D
D
D
D
D
D
F
F
U
D
D
D
D
D
D
D
D
D
D
F
F
F
U
D
D
D
D
D
D
D
D
D
D
D
F
U
U
D
D
D
D
D
D
D
D
D
D
F
F
U
U
D
D
D
D
D
D
D
D
D
F
F
F
U
U
D
F
U
U
U
U
U
U
U
U
U
U
U
U
D
D
F
U
U
U
U
U
U
U
U
U
U
U
D
D
D
F
U
U
U
U
U
U
U
U
U
U
D
F
F
U
U
U
U
U
U
U
U
U
U
U
D
D
F
F
U
U
U
U
U
U
U
U
U
U
D
D
D
F
F
U
U
U
U
U
U
U
U
U
D
F
F
F
U
U
U
U
U
U
U
U
U
U
D
D
F
F
F
U
U
U
U
U
U
U
U
U
D
D
D
F
F
F
U
U
U
U
U
U
U
U
D
D
D
D
D
D
D
D
D
F
F
F
F
U
D
D
D
D
D
D
F
F
F
F
F
F
U
U
D
D
D
D
D
D
F
F
U
U
U
U
U
U
D
D
D
D
D
F
U
D
D
D
D
D
F
U
D
D
F
U
U
U
U
D
D
F
U
U
U
U
D
F
U
U
U
U
U
D
F
U
U
U
U
U
D
D
D
D
F
F
U
D
D
D
D
F
F
U
D
D
F
F
U
U
U
D
D
F
F
U
U
U
D
F
F
U
U
U
U
D
F
F
U
U
U
U
D
F
F
F
F
F
U
D
F
F
F
F
F
U
D
D
F
F
F
F
U
D
D
F
F
F
F
U
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
U
U
U
D
D
D
D
D
D,
second set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
U
F
F
F
F
F
F
F
F
F
F
F
F
D
U
U
F
F
F
F
F
F
F
F
F
F
F
D
U
U
U
F
F
F
F
F
F
F
F
F
F
D
U
F
F
F
F
F
F
F
F
F
F
F
D
D
U
U
F
F
F
F
F
F
F
F
F
F
D
D
U
U
U
F
F
F
F
F
F
F
F
F
D
D
U
F
F
F
F
F
F
F
F
F
F
D
D
D
U
U
F
F
F
F
F
F
F
F
F
D
D
D
U
U
U
F
F
F
F
F
F
F
F
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
F
D
U
U
U
U
U
U
U
U
U
U
U
F
F
D
U
U
U
U
U
U
U
U
U
U
F
F
F
D
U
U
U
U
U
U
U
U
U
U
U
F
D
D
U
U
U
U
U
U
U
U
U
U
F
F
D
D
U
U
U
U
U
U
U
U
U
F
F
F
D
D
U
F
D
D
D
D
D
D
D
D
D
D
D
D
U
U
F
D
D
D
D
D
D
D
D
D
D
D
U
U
U
F
D
D
D
D
D
D
D
D
D
D
U
F
F
D
D
D
D
D
D
D
D
D
D
D
U
U
F
F
D
D
D
D
D
D
D
D
D
D
U
U
U
F
F
D
D
D
D
D
D
D
D
D
U
F
F
F
D
D
D
D
D
D
D
D
D
D
U
U
F
F
F
D
D
D
D
D
D
D
D
D
U
U
U
F
F
F
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
F
F
F
F
D
U
U
U
U
U
U
F
F
F
F
F
F
D
D
U
U
U
U
U
U
F
F
D
D
D
D
D
D,
wherein, in the first set of slot formats and the second set of slot formats, D is downlink symbol, U is uplink symbol, and F is flexible symbol, and
wherein, for a downlink symbol which is configured as a soft type, the DU performs transmission in the downlink symbol in case that the MT does not perform transmission in the downlink symbol.
6. The method of claim 5 , wherein each of the MT of the IAB node and the DU of the IAB node is separately configured with its own slot format,
wherein U is an uplink symbol, F is a flexible symbol, and D is a downlink symbol.
7. The method of claim 5 , wherein a slot format for the DU of the IAB node is configured by F1 application protocol (F1AP) signaling.
8. The method of claim 5 , wherein the MT of the IAB node is controlled by the DU to receive scheduling of transmitting and receiving data.
9. An integrated access and backhaul (IAB) node including a distributed unit (DU) and a mobile termination (MT) in a wireless communication system, the IAB node comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
receive, by the MT, downlink control information (DCI) for identifying a slot format from at least one slot format, and
communicate, by the MT, in a slot based on the slot format,
wherein one slot includes 14 orthogonal frequency division multiplexing (OFDM) symbols with indexes from 0 to 13,
wherein the at least one slot format is configured based on a first set of slot formats and a second set of slot formats, as defined by the following tables:
first set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
D
D
D
D
D
D
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
D
D
D
D
F
D
D
D
D
D
D
D
D
D
D
D
D
F
F
D
D
D
D
D
D
D
D
D
D
D
F
F
F
D
D
D
D
D
D
D
D
D
D
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
U
F
F
F
F
F
F
F
F
F
F
F
F
U
U
F
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
U
U
U
U
U
U
U
U
D
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
F
F
F
F
F
F
F
F
F
F
F
D
F
F
F
F
F
F
F
F
F
F
F
F
U
D
D
F
F
F
F
F
F
F
F
F
F
F
U
D
D
D
F
F
F
F
F
F
F
F
F
F
U
D
F
F
F
F
F
F
F
F
F
F
F
U
U
D
D
F
F
F
F
F
F
F
F
F
F
U
U
D
D
D
F
F
F
F
F
F
F
F
F
U
U
D
F
F
F
F
F
F
F
F
F
F
U
U
U
D
D
F
F
F
F
F
F
F
F
F
U
U
U
D
D
D
F
F
F
F
F
F
F
F
U
U
U
D
D
D
D
D
D
D
D
D
D
D
D
F
U
D
D
D
D
D
D
D
D
D
D
D
F
F
U
D
D
D
D
D
D
D
D
D
D
F
F
F
U
D
D
D
D
D
D
D
D
D
D
D
F
U
U
D
D
D
D
D
D
D
D
D
D
F
F
U
U
D
D
D
D
D
D
D
D
D
F
F
F
U
U
D
F
U
U
U
U
U
U
U
U
U
U
U
U
D
D
F
U
U
U
U
U
U
U
U
U
U
U
D
D
D
F
U
U
U
U
U
U
U
U
U
U
D
F
F
U
U
U
U
U
U
U
U
U
U
U
D
D
F
F
U
U
U
U
U
U
U
U
U
U
D
D
D
F
F
U
U
U
U
U
U
U
U
U
D
F
F
F
U
U
U
U
U
U
U
U
U
U
D
D
F
F
F
U
U
U
U
U
U
U
U
U
D
D
D
F
F
F
U
U
U
U
U
U
U
U
D
D
D
D
D
D
D
D
D
F
F
F
F
U
D
D
D
D
D
D
F
F
F
F
F
F
U
U
D
D
D
D
D
D
F
F
U
U
U
U
U
U
D
D
D
D
D
F
U
D
D
D
D
D
F
U
D
D
F
U
U
U
U
D
D
F
U
U
U
U
D
F
U
U
U
U
U
D
F
U
U
U
U
U
D
D
D
D
F
F
U
D
D
D
D
F
F
U
D
D
F
F
U
U
U
D
D
F
F
U
U
U
D
F
F
U
U
U
U
D
F
F
U
U
U
U
D
F
F
F
F
F
U
D
F
F
F
F
F
U
D
D
F
F
F
F
U
D
D
F
F
F
F
U
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
U
U
U
D
D
D
D
D
D,
second set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
U
F
F
F
F
F
F
F
F
F
F
F
F
D
U
U
F
F
F
F
F
F
F
F
F
F
F
D
U
U
U
F
F
F
F
F
F
F
F
F
F
D
U
F
F
F
F
F
F
F
F
F
F
F
D
D
U
U
F
F
F
F
F
F
F
F
F
F
D
D
U
U
U
F
F
F
F
F
F
F
F
F
D
D
U
F
F
F
F
F
F
F
F
F
F
D
D
D
U
U
F
F
F
F
F
F
F
F
F
D
D
D
U
U
U
F
F
F
F
F
F
F
F
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
F
D
U
U
U
U
U
U
U
U
U
U
U
F
F
D
U
U
U
U
U
U
U
U
U
U
F
F
F
D
U
U
U
U
U
U
U
U
U
U
U
F
D
D
U
U
U
U
U
U
U
U
U
U
F
F
D
D
U
U
U
U
U
U
U
U
U
F
F
F
D
D
U
F
D
D
D
D
D
D
D
D
D
D
D
D
U
U
F
D
D
D
D
D
D
D
D
D
D
D
U
U
U
F
D
D
D
D
D
D
D
D
D
D
U
F
F
D
D
D
D
D
D
D
D
D
D
D
U
U
F
F
D
D
D
D
D
D
D
D
D
D
U
U
U
F
F
D
D
D
D
D
D
D
D
D
U
F
F
F
D
D
D
D
D
D
D
D
D
D
U
U
F
F
F
D
D
D
D
D
D
D
D
D
U
U
U
F
F
F
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
F
F
F
F
D
U
U
U
U
U
U
F
F
F
F
F
F
D
D
U
U
U
U
U
U
F
F
D
D
D
D
D
D,
wherein, in the first set of slot formats and the second set of slot formats, D is downlink symbol, U is uplink symbol, and F is flexible symbol, and
wherein, for a downlink symbol which is configured as a soft type, the DU performs transmission in the downlink symbol in case that the MT does not perform transmission in the downlink symbol.
10. The IAB node of claim 9 , wherein each of the MT and the DU is separately configured with its own slot format.
11. The IAB node of claim 9 , wherein a slot format for the DU is configured by F1 application protocol (F1AP) signaling.
12. The IAB node of claim 9 , wherein the MT of the IAB node is controlled by a DU of an upper IAB node to receive scheduling of transmitting and receiving data.
13. A base station including a central unit (CU) and a distributed unit (DU) in a wireless communication system, the base station comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to:
transmit, to an integrated access and backhaul (IAB) node, downlink control information (DCI) for identifying a slot format from at least one slot format for a mobile termination (MT) of the IAB node, and
communicate in a slot based on the slot format,
wherein one slot includes 14 orthogonal frequency division multiplexing (OFDM) symbols with indexes from 0 to 13,
wherein the at least one slot format is configured based on a first set of slot formats and a second set of slot formats, as defined by the following tables:
first set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
D
D
D
D
D
D
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
D
D
D
D
F
D
D
D
D
D
D
D
D
D
D
D
D
F
F
D
D
D
D
D
D
D
D
D
D
D
F
F
F
D
D
D
D
D
D
D
D
D
D
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
U
F
F
F
F
F
F
F
F
F
F
F
F
U
U
F
U
U
U
U
U
U
U
U
U
U
U
U
U
F
F
U
U
U
U
U
U
U
U
U
U
U
U
F
F
F
U
U
U
U
U
U
U
U
U
U
U
F
F
F
F
U
U
U
U
U
U
U
U
U
U
F
F
F
F
F
U
U
U
U
U
U
U
U
U
F
F
F
F
F
F
U
U
U
U
U
U
U
U
D
F
F
F
F
F
F
F
F
F
F
F
F
F
D
D
F
F
F
F
F
F
F
F
F
F
F
F
D
D
D
F
F
F
F
F
F
F
F
F
F
F
D
F
F
F
F
F
F
F
F
F
F
F
F
U
D
D
F
F
F
F
F
F
F
F
F
F
F
U
D
D
D
F
F
F
F
F
F
F
F
F
F
U
D
F
F
F
F
F
F
F
F
F
F
F
U
U
D
D
F
F
F
F
F
F
F
F
F
F
U
U
D
D
D
F
F
F
F
F
F
F
F
F
U
U
D
F
F
F
F
F
F
F
F
F
F
U
U
U
D
D
F
F
F
F
F
F
F
F
F
U
U
U
D
D
D
F
F
F
F
F
F
F
F
U
U
U
D
D
D
D
D
D
D
D
D
D
D
D
F
U
D
D
D
D
D
D
D
D
D
D
D
F
F
U
D
D
D
D
D
D
D
D
D
D
F
F
F
U
D
D
D
D
D
D
D
D
D
D
D
F
U
U
D
D
D
D
D
D
D
D
D
D
F
F
U
U
D
D
D
D
D
D
D
D
D
F
F
F
U
U
D
F
U
U
U
U
U
U
U
U
U
U
U
U
D
D
F
U
U
U
U
U
U
U
U
U
U
U
D
D
D
F
U
U
U
U
U
U
U
U
U
U
D
F
F
U
U
U
U
U
U
U
U
U
U
U
D
D
F
F
U
U
U
U
U
U
U
U
U
U
D
D
D
F
F
U
U
U
U
U
U
U
U
U
D
F
F
F
U
U
U
U
U
U
U
U
U
U
D
D
F
F
F
U
U
U
U
U
U
U
U
U
D
D
D
F
F
F
U
U
U
U
U
U
U
U
D
D
D
D
D
D
D
D
D
F
F
F
F
U
D
D
D
D
D
D
F
F
F
F
F
F
U
U
D
D
D
D
D
D
F
F
U
U
U
U
U
U
D
D
D
D
D
F
U
D
D
D
D
D
F
U
D
D
F
U
U
U
U
D
D
F
U
U
U
U
D
F
U
U
U
U
U
D
F
U
U
U
U
U
D
D
D
D
F
F
U
D
D
D
D
F
F
U
D
D
F
F
U
U
U
D
D
F
F
U
U
U
D
F
F
U
U
U
U
D
F
F
U
U
U
U
D
F
F
F
F
F
U
D
F
F
F
F
F
U
D
D
F
F
F
F
U
D
D
F
F
F
F
U
F
F
F
F
F
F
F
D
D
D
D
D
D
D
D
D
F
F
F
U
U
U
D
D
D
D
D
D,
second set of slot formats:
symbol index in the slot
0
1
2
3
4
5
6
7
8
9
10
11
12
13
U
F
F
F
F
F
F
F
F
F
F
F
F
D
U
U
F
F
F
F
F
F
F
F
F
F
F
D
U
U
U
F
F
F
F
F
F
F
F
F
F
D
U
F
F
F
F
F
F
F
F
F
F
F
D
D
U
U
F
F
F
F
F
F
F
F
F
F
D
D
U
U
U
F
F
F
F
F
F
F
F
F
D
D
U
F
F
F
F
F
F
F
F
F
F
D
D
D
U
U
F
F
F
F
F
F
F
F
F
D
D
D
U
U
U
F
F
F
F
F
F
F
F
D
D
D
U
U
U
U
U
U
U
U
U
U
U
U
F
D
U
U
U
U
U
U
U
U
U
U
U
F
F
D
U
U
U
U
U
U
U
U
U
U
F
F
F
D
U
U
U
U
U
U
U
U
U
U
U
F
D
D
U
U
U
U
U
U
U
U
U
U
F
F
D
D
U
U
U
U
U
U
U
U
U
F
F
F
D
D
U
F
D
D
D
D
D
D
D
D
D
D
D
D
U
U
F
D
D
D
D
D
D
D
D
D
D
D
U
U
U
F
D
D
D
D
D
D
D
D
D
D
U
F
F
D
D
D
D
D
D
D
D
D
D
D
U
U
F
F
D
D
D
D
D
D
D
D
D
D
U
U
U
F
F
D
D
D
D
D
D
D
D
D
U
F
F
F
D
D
D
D
D
D
D
D
D
D
U
U
F
F
F
D
D
D
D
D
D
D
D
D
U
U
U
F
F
F
D
D
D
D
D
D
D
D
U
U
U
U
U
U
U
U
U
F
F
F
F
D
U
U
U
U
U
U
F
F
F
F
F
F
D
D
U
U
U
U
U
U
F
F
D
D
D
D
D
D,
wherein, in the first set of slot formats and the second set of slot formats, D is downlink symbol, U is uplink symbol, and F is flexible symbol, and
wherein, for a downlink symbol which is configured as a soft type, the DU performs transmission in the downlink symbol in case that the MT does not perform transmission in the downlink symbol.
14. The base station of claim 13 , wherein each of the MT of the IAB node and the DU of the IAB node is separately configured with its own slot format.
15. The base station of claim 13 , wherein a slot format for the DU of the IAB node is configured by F1 application protocol (F1AP) signaling.
16. The base station of claim 13 , wherein the MT of the IAB node is controlled by the DU to receive scheduling of transmitting and receiving data.