Method for transmitting and receiving data in wireless communication system and apparatus therefor
The present specification provides a method for transmitting and receiving data by a relay node in a wireless communication system and an apparatus therefor. The relay node receives configuration information from a network node, wherein the configuration information may include a timing offset for transmitting downlink data. The relay node transmits the downlink data to a second relay node on the basis of the configuration information, in which transmission timing of the downlink data may be determined on the basis of the timing offset and a timing advance (TA).
1. A method for transmitting/receiving data by a first relay node in a wireless communication system, the method comprising:
receiving configuration information from a network node,
wherein the configuration information includes a timing offset for transmitting downlink data; and
transmitting, to a second relay node, the downlink data based on the configuration information,
wherein transmission timing of the downlink data is determined based on the timing offset and a timing advance (TA), and
wherein, based on that uplink transmission and downlink transmission are performed by using the Time Division Multiplexing (TDM) method through a backhaul link or an access link, a transmission gap for matching a boundary between symbols is inserted between the uplink transmission and the downlink transmission.
2. The method of claim 1 , wherein the TA is acquired from the network node or calculated based on the configuration information.
3. The method of claim 1 , wherein based on the first relay node simultaneously performing transmission/reception of data through the backhaul link and the access link by using Frequency Division Multiplexing (FDM), different slot formats are configured in the backhaul link and the access link in order to match transmission timing with another node of the first relay node or the terminal.
4. The method of claim 1 , wherein the transmission timing and reception timing of uplink transmission and downlink transmission of the network node, the first relay node, and the second relay node are absolutely the same.
5. The method of claim 4 , further comprising:
receiving a synchronization signal from the network node; and
performing synchronization with the network node based on the synchronization signal.
6. The method of claim 1 , wherein the transmission gap is divided into a first transmission gap inserted when the uplink transmission is switched to the downlink transmission or a second transmission gap inserted when the downlink transmission is switched to the uplink transmission.
7. The method of claim 6 , wherein at least one of the first transmission gap or the second transmission gap is acquired from the network node.
8. The method of claim 7 , wherein when the first transmission gap or the second transmission gap is acquired from the network node,
the first transmission gap is configured to a value acquired by excluding the second transmission gap from a symbol length, and
the second transmission gap is configured to a value acquired by excluding the first transmission gap from the symbol length.
9. The method of claim 1 , wherein a first transmission gap for matching a symbol boundary of a backhaul link and the symbol boundary of an access link is inserted when transmission through the backhaul link is switched to transmission through the access link, and
a second transmission gap for matching the symbol boundary of the backhaul link and the symbol boundary of the access link is inserted when the transmission through the access link is switched to the transmission through the backhaul link.
10. The method of claim 9 , wherein at least one of the first transmission gap and/or the second transmission gap is acquired from the network node.
11. A first relay node for transmitting/receiving data in a wireless communication system, the first relay node comprising:
a transceiver;
at least one processor; and
at least one computer memory operably connectable to the at least one processor and storing instructions that, based on being executed by the at least one processor,
wherein the operations comprise:
receiving configuration information from a network node,
wherein the configuration information includes a timing offset for transmitting downlink data, and
transmitting, to a second relay node, the downlink data based on the configuration information,
wherein transmission timing of the downlink data is determined based on the timing offset and a timing advance (TA), and
wherein, based on that uplink transmission and downlink transmission are performed by using the Time Division Multiplexing (TDM) method through a backhaul link or an access link, a transmission gap for matching a boundary between symbols is inserted between the uplink transmission and the downlink transmission.