Method and apparatus for efficiently transmitting PDSCH using a resource region in a wireless communication system
Disclosed is a communication technique for merging, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4G system, and a system therefor. The present disclosure can be applied to intelligent services (for example, smart home, smart building, smart city, smart car or connected car, healthcare, digital education, retail, security, and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. The purpose of the present invention is to efficiently transmit downlink data in a slot in which a synchronization signal block is transmitted and, according to the present invention, a base station in a communication system checks whether a synchronization signal block and downlink data are transmitted in the same slot, determines a downlink data transmission method when the synchronization signal block and the downlink data are transmitted in the same slot, and transmits the downlink data and a demodulation reference signal for the downlink data to a terminal on the basis of the downlink data transmission method, and the downlink data transmission method can be determined on the basis of at least one of the transmission pattern of the synchronization signal block, the relationship between the synchronization signal block and a subcarrier interval applied to the downlink data, and the index of the slot in which the synchronization signal block is to be transmitted.
1. A method of transmitting downlink data by an base station in a wireless communication system, the method comprising:
transmitting, to a terminal, information for transmission of a synchronization signal block using bits, wherein the transmission of the synchronization signal block is associated with a subcarrier spacing;
transmitting resource allocation information for a physical downlink shared channel (PDSCH); and
transmitting, to the terminal, the PDSCH based on the resource allocation information for the PDSCH, except for a resource block for the synchronization signal block in an orthogonal frequency division multiplexing (OFDM) symbol where the synchronization signal block is transmitted,
wherein the resource block is associated with a frequency domain resource allocation for the PDSCH.
2. The method of claim 1 , further comprising:
identifying resources for transmission of a demodulation reference signal (DMRS) for the PDSCH; and
transmitting the DMRS on the identified resources except for resources for the DMRS that overlap with resources for the transmission of the synchronization signal block.
3. The method of claim 1 , further comprising transmitting mini-slot configuration information to the terminal, wherein the mini-slot configuration information indicates whether the slot in which the synchronization signal block is transmitted is a mini slot.
4. The method of claim 3 , wherein, in case that the slot for transmitting the PDSCH corresponds to the slot in which the synchronization signal block is transmitted and the slot corresponds to the mini slot, the resource region for transmitting the PDSCH corresponds to an OFDM block in which the synchronization signal block is transmitted on a time axis.
5. A method of receiving downlink data by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, information for transmission of a synchronization signal block using bits, wherein the transmission of the synchronization signal block is associated with a subcarrier spacing;
receiving resource allocation information for a physical downlink shared channel (PDSCH); and
receiving, from the base station, the PDSCH based on the resource allocation information, except for a resource block for the synchronization signal block in an orthogonal frequency division multiplexing (OFDM) symbol where the synchronization signal block is received,
wherein the resource block is associated with a frequency domain resource allocation for the PDSCH.
6. The method of claim 5 , further comprising:
identifying resources for transmission of a demodulation reference signal (DMRS) for the PDSCH, and
receiving the DMRS on the identified resources except for resources for the DMRS that overlap with resources for the transmission of the synchronization signal block.
7. The method of claim 5 , further comprising receiving mini-slot configuration information from the base station, wherein the mini-slot configuration information indicates whether the slot in which the synchronization signal block is received is a mini slot.
8. The method of claim 7 , wherein, in case that the slot for receiving the PDSCH corresponds to the slot in which the synchronization signal block is received and the slot corresponds to the mini slot, the resource region for receiving the PDSCH corresponds to an OFDM block in which the synchronization signal block is received on a time axis.
9. An base station for transmitting downlink data in a wireless communication system, the base station comprising:
a transceiver; and
a controller configured to:
transmit, to a terminal, information for transmission of a synchronization signal block using bits, wherein the transmission of the synchronization signal block is associated with a subcarrier spacing,
transmit resource allocation information for a physical downlink shared channel (PDSCH), and
transmit, to the terminal, the PDSCH based on the resource allocation information for the PDSCH, except for a resource block for the synchronization signal block in an orthogonal frequency division multiplexing (OFDM) symbol where the synchronization signal block is transmitted,
wherein the resource block is associated with a frequency domain resource allocation for the PDSCH.
10. The base station of claim 9 , wherein the controller is further configured to:
identify resources for transmission of a demodulation reference signal (DMRS) for the PDSCH; and
transmit the DMRS on the identified resources except for resources for the DMRS that overlap with resources for the transmission of the synchronization signal block.
11. The base station of claim 9 , wherein the controller further perform control to transmit mini-slot configuration information to the terminal, and the mini-slot configuration information indicates whether the slot in which the synchronization signal block is transmitted is a mini slot.
12. The base station of claim 11 , wherein, in case that the slot for transmitting the PDSCH corresponds to the slot in which the synchronization signal block is transmitted and the slot corresponds to the mini slot, the resource region for transmitting the PDSCH corresponds to an OFDM block in which the synchronization signal block is transmitted on a time axis.
13. A terminal for receiving downlink data in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
receive, from a base station, information for transmission of a synchronization signal block using bits, wherein the transmission of the synchronization signal block is associated with a subcarrier spacing,
receive resource allocation information for a physical downlink shared channel (PDSCH), and
receive, from the base station, the PDSCH based on the resource allocation information, except for a resource block for the synchronization signal block in an orthogonal frequency division multiplexing (OFDM) symbol where the synchronization signal block is received,
wherein the resource block is associated with a frequency domain resource allocation for the PDSCH.
14. The terminal of claim 13 , wherein the controller is further configured to:
identify resources for transmission of a demodulation reference signal (DMRS) for the PDSCH, and
receive the DMRS on the identified resources except for resources for the DMRS that overlap with resources for the transmission of the synchronization signal block.
15. The terminal of claim 13 , wherein the controller further performs control to receive mini-slot configuration information from the base station, the mini-slot configuration information indicates whether the slot in which the synchronization signal block is received is a mini slot, and
wherein in case that the slot for receiving the PDSCH corresponds to the slot in which the synchronization signal block is received and the slot corresponds to the mini slot, the resource region for receiving the PDSCH corresponds to an OFDM block in which the synchronization signal block is received on a time axis.