Method for operating IAB node in wireless communication system, and device using method
Provided are: a method for operating an integrated access and backhaul (IAB) node including a mobile terminal (MT) and a distributed unit (DU) in a wireless communication system; and a node using the method. Provided are: a method for operating another node communicating with the IAB node; and the other node using the method. The IAB node identifies a first resource allocated for the operation of the MT and a second resource allocated for the operation of the DU, the first resource and the second resource being resources in which overlap occurs in a time domain, determines a guard period in the first resource or the second resource, and performs either the operation of the MT or the operation of the DU in the guard period.
1. A method comprising:
receiving, by an integrated access and backhaul (IAB) node including a distributed unit (DU) and a mobile terminal (MT), a signal informing of a number of guard symbols; and
performing, by the IAB node, a switching scenario among a plurality of switching scenarios,
wherein the plurality of switching scenarios comprising i) switching from a first operation of the MT to a second operation of the DU, and ii) switching from a third operation of the DU to a fourth operation of the MT,
wherein the plurality of switching scenarios are distinguished based on both i) operation directions, which comprise a transmission and a reception, of the MT and the DU and ii) timing mode cases of the MT and the DU,
wherein the timing mode cases comprise a case 1, a case 6 and case 7,
wherein, in the case 1, the IAB node determines a time of MT transmission based on timing advance (TA) configuration information which is provided,
wherein, in case 6, the IAB node determines a time of the MT transmission based on a time of DU transmission of the IAB node,
wherein, in case 7, the IAB node determines a time of the MT transmission based on additional TA configuration information which is provided,
wherein the guard symbols are not used for the MT in a slot where the IAB node transitions between the MT and the DU based on the switching scenario,
wherein a first timing mode case for the MT and a second timing mode case for the DU are different from each other, and
wherein, in the signal, a separate value for the number of guard symbols is specified for each of the plurality of switching scenarios.
2. The method of claim 1 , further comprising:
transmitting a signal informing of a number of guard symbols desired of the IAB node.
3. The method of claim 1 , wherein each of the first operation and the fourth operation comprises a transmission.
4. The method of claim 1 , wherein each of the second operation and the third operation comprises a transmission.
5. An integrated access and backhaul (IAB) node including a distributed unit (DU) and a mobile terminal (MT), the IAB node comprising:
at least one transceiver;
at least one processor; and
at least one memory operatively coupled with the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving, through the at least one transceiver, a signal informing of a number of guard symbols; and
performing a switching scenario among a plurality of switching scenarios,
wherein the plurality of switching scenarios comprising i) switching from a first operation of the MT to a second operation of the DU, and ii) switching from a third operation of the DU to a fourth operation of the MT,
wherein the plurality of switching scenarios are distinguished based on both i) operation directions, which comprise a transmission and a reception, of the MT and the DU and ii) timing mode cases of the MT and the DU,
wherein the timing mode cases comprise a case 1, a case 6 and case 7,
wherein, in the case 1, the IAB node determines a time of MT transmission based on timing advance (TA) configuration information which is provided,
wherein, in case 6, the IAB node determines a time of the MT transmission based on a time of DU transmission of the IAB node,
wherein, in case 7, the IAB node determines a time of the MT transmission based on additional TA configuration information which is provided,
wherein the guard symbols are not used for the MT in a slot where the IAB node transitions between the MT and the DU based on the switching scenario,
wherein a first timing mode case for the MT and a second timing mode case for the DU are different from each other, and
wherein, in the signal, a separate value for the number of guard symbols is specified for each of the plurality of switching scenarios.
6. The JAB node of claim 5 , wherein the operations further comprise:
transmitting a signal informing of a number of guard symbols desired of the IAB node.
7. The IAB node of claim 5 , wherein each of the first operation and the fourth operation comprises a transmission.
8. The IAB node of claim 5 , wherein each of the second operation and the third operation comprises a transmission.
9. An apparatus of an integrated access and backhaul (JAB) node including a distributed unit (DU) and a mobile terminal (MT), the apparatus comprising:
at least one processor; and
at least one memory operatively coupled with the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:
receiving a signal informing of a number of guard symbols; and
performing a switching scenario among a plurality of switching scenarios,
wherein the plurality of switching scenarios comprise i) switching from a first operation of the MT to a second operation of the DU, and ii) switching from a third operation of the DU to a fourth operation of the MT,
wherein the plurality of switching scenarios are distinguished based on both i) operation directions, which comprise a transmission and a reception, of the MT and the DU and ii) timing mode cases of the MT and the DU,
wherein the timing mode cases comprise a case 1, a case 6 and case 7,
wherein, in the case 1, the IAB node determines a time of MT transmission based on timing advance (TA) configuration information which is provided,
wherein, in case 6, the IAB node determines a time of the MT transmission based on a time of DU transmission of the IAB node,
wherein, in case 7, the IAB node determines a time of the MT transmission based on additional TA configuration information which is provided,
wherein the guard symbols are not used for the MT in a slot where the IAB node transitions between the MT and the DU based on the switching scenario,
wherein a first timing mode case for the MT and a second timing mode case for the DU are different from each other, and
wherein, in the signal, a separate value for the number of guard symbols is specified for each of the plurality of switching scenarios.
10. The apparatus of claim 9 , wherein the operations further comprise:
transmitting a signal informing of a number of guard symbols desired of the IAB node.
11. The apparatus of claim 9 , wherein each of the first operation and the fourth operation comprises a transmission.
12. The apparatus of claim 9 , wherein each of the second operation and the third operation comprises a transmission.