Initial access method of IAB node in wireless communication system and apparatus using same method
An initial access method of an integrated access and backhaul (IAB) node in a wireless communication system and an apparatus using the method are provided. The method includes: receiving, from a parent node, a synchronization signal block (SSB) and system information; and performing a random access procedure with the parent node on the basis of the SSB and the system information, wherein the SSB and the system information are received through a resource allocated to an access link of the parent node, and the random access step is performed through a resource allocated to the backhaul link of the parent node, and the random access step is performed using resources determined differently depending on whether the TAB node is a relay node or a terminal.
1. A method of performing a random access procedure of an Integrated Access and Backhaul (IAB) node in a wireless communication system, the method comprising:
receiving information related to random access channel (RACH) parameters; and
performing a random access procedure to a parent node based on the information,
wherein the information comprises a configuration for informing a RACH parameter depending on a device type of the IAB node, and
wherein a first parameter for the IAB node is derived by adding or multiplying an offset, provided by the information, to a second parameter for a terminal.
2. The method of claim 1 , wherein the configuration is received through a radio resource control (RRC) message.
3. The method of claim 1 , wherein the configuration informs RACH resources that are classified based on whether the IAB node is a relay node or the terminal.
4. The method of claim 1 , wherein the information is included in system information.
5. The method of claim 1 , wherein the random access procedure is related to an initial access to the parent node.
6. The method of claim 1 , wherein the information comprises i) a first configuration informing available RACH resources based on the IAB node being a relay node and ii) a second configuration informing available RACH resources based on the IAB node being the terminal.
7. An Integrated Access and Backhaul (IAB) node, comprising:
a transceiver transmitting and receiving radio signals; and
a processor being operatively connected to the transceiver,
wherein the processor is configured to:
receive information related to random access channel (RACH) parameters, and
perform a random access procedure to a parent node based on the information,
wherein the information comprises a configuration for informing a RACH parameter depending on a device type of the IAB node, and
wherein a first parameter for the IAB node is derived by adding or multiplying an offset, provided by the information, to a second parameter for a terminal.
8. The IAB node of claim 7 , wherein the configuration is received through a radio resource control (RRC) message.
9. The IAB node of claim 7 , wherein the configuration informs RACH resources that are classified based on whether the IAB node is a relay node or the terminal.
10. The IAB node of claim 7 , wherein the information is included in system information.
11. The IAB node of claim 7 , wherein the random access procedure is related to an initial access to the parent node.
12. The IAB node of claim 7 , wherein the information comprises i) a first configuration informing available RACH resources based on the IAB node being a relay node and ii) a second configuration informing available RACH resources based on the IAB node being the terminal.
13. An apparatus, the apparatus comprising:
a memory; and
a processor being operatively connected to the memory,
wherein the processor is configured to control a wireless communication device to:
receive information related to random access channel (RACH) parameters, and
perform a random access procedure to a parent node based on the information,
wherein the information comprises a configuration for informing a RACH parameter depending on a device type of the IAB node, and
wherein a first parameter for the IAB node is derived by adding or multiplying an offset, provided by the information, to a second parameter for a terminal.