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 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation 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 an apparatus 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 DU, from a central unit (CU) of a base station, a message scheduling a resource for the DU, the message including a configuration indicating a type for each symbol of the resource to be hard, soft or unavailable;
identifying, by the DU, whether a type for a symbol of a slot is configured to be hard based on the message; and
performing, by the DU, a transmission or a reception in the symbol, in case that the type for the symbol is configured to be hard,
wherein a slot format of the slot includes at least one of downlink symbols, uplink symbols, or flexible symbols, and
wherein the transmission is performed in the downlink symbols, the reception is performed in the uplink symbols, and the transmission or the reception is performed in the flexible symbols.
2. The method of claim 1 ,
wherein the transmission of the DU includes a transmission to a terminal or a next-hop IAB node, and
wherein the reception of the DU includes a reception from the terminal or the next-hop IAB node.
3. The method of claim 1 , wherein a transmission or a reception of the MT is not performed in the symbol for which the type is configured to be hard.
4. The method of claim 1 ,
wherein the transmission or the reception of the DU has higher priority than a transmission or a reception of the MT for the symbol for which the type is configured to be hard, and
wherein the transmission or the reception of the MT is dropped in the symbol.
5. The method of claim 1 , wherein the transmission or the reception of the DU is performed in accordance with a half-duplex constraint of the IAB node.
6. An integrated access and backhaul (IAB) node in a wireless communication system, the IAB node comprising:
a mobile termination (MT); and
a distributed unit (DU),
wherein the DU is configured to:
receive, from a central unit (CU) of a base station, a message scheduling a resource for the DU, the message including a configuration indicating a type for each symbol of the resource to be hard, soft or unavailable,
identify whether a type for a symbol of a slot is configured to be hard based on the message, and
perform a transmission or a reception in the symbol, in case that the type for the symbol is configured to be hard,
wherein a slot format of the slot includes at least one of downlink symbols, uplink symbols, or flexible symbols, and
wherein the transmission is performed in the downlink symbols, the reception is performed in the uplink symbols, and the transmission or the reception is performed in the flexible symbols.
7. The IAB node of claim 6 ,
wherein the transmission of the DU includes a data transmission to a terminal or a next-hop IAB node, and
wherein the reception of the DU includes a reception from the terminal or the next-hop IAB node.
8. The IAB node of claim 6 , wherein a transmission or a reception of the MT is not performed in the symbol for which the type is configured to be hard.
9. The IAB node of claim 6 ,
wherein the transmission or the reception of the DU has higher priority than a transmission or a reception of the MT for the symbol for which the type is configured to be hard, and
wherein the transmission or the reception of the MT is dropped in the symbol.
10. The IAB node of claim 6 , wherein the transmission or the reception of the DU is performed in accordance with a half-duplex constraint of the IAB node.
11. A method performed by a base station including a central unit (CU) in a wireless communication system, the method comprising:
transmitting, to a distributed unit (DU) of an integrated access and backhaul (IAB) node including the DU and a mobile termination (MT), a message scheduling a resource for the DU, the message including a configuration indicating a type for each symbol of the resource to be hard, soft, or unavailable,
wherein a transmission or a reception of the DU is performed in a symbol of a slot for which a type is configured to be hard,
wherein a slot format of the slot includes at least one of downlink symbols, uplink symbols, or flexible symbols, and
wherein the transmission of the DU is performed in the downlink symbols, the reception of the DU is performed in the uplink symbols, and the transmission or the reception of the DU is performed in the flexible symbols.
12. The method of claim 11 ,
wherein the transmission of the DU includes a transmission to a terminal or a next-hop IAB node, and
wherein the reception of the DU includes a reception from the terminal or the next-hop IAB node.
13. The method of claim 11 , wherein a transmission or a reception of the MT is not performed in the symbol for which the type is configured to be hard.
14. The method of claim 11 ,
wherein the transmission or the reception of the DU has higher priority than a transmission or a reception of the MT for the symbol for which the type is configured to be hard, and
wherein the transmission or the reception of the MT is dropped in the symbol.
15. The method of claim 11 , wherein the transmission or the reception of the DU is performed in accordance with a half-duplex constraint of the IAB node.
16. A base station in a wireless communication system, the base station comprising:
a central unit (CU) configured to transmit, to a distributed unit (DU) of an integrated access and backhaul (IAB) node including the DU and a mobile termination (MT), a message scheduling a resource for the DU, the message including a configuration indicating a type for each symbol of the resource to be hard, soft, or unavailable,
wherein a transmission or a reception of the DU is performed in a symbol of a slot for which a type is configured to be hard,
wherein a slot format of the slot includes at least one of downlink symbols, uplink symbols, or flexible symbols, and
wherein the transmission of the DU is performed in the downlink symbols, the reception of the DU is performed in the uplink symbols, and the transmission or the reception of the DU is performed in the flexible symbols.
17. The base station of claim 16 ,
wherein the transmission of the DU includes a transmission to a terminal or a next-hop IAB node, and
wherein the reception of the DU includes a reception from the terminal or the next-hop IAB node.
18. The base station of claim 16 , wherein a transmission or a reception of the MT is not performed in the symbol for which the type is configured to be hard.
19. The base station of claim 16 ,
wherein the transmission or the reception of the DU has higher priority than a transmission or a reception of the MT for the symbol for which the type is configured to be hard, and
wherein the transmission or the reception of the MT is dropped in the symbol.
20. The base station of claim 16 , wherein the transmission or the reception of the DU is performed in accordance with a half-duplex constraint of the IAB node.