Method for signal transmission/reception between terminal and base station in wireless communication system, and device supporting same

1. A method for transmitting and receiving, by a terminal, a signal to and from a base station in a wireless communication system, the method comprising:

receiving, from the base station, configuration information for configuring an operation of the terminal according to a first communication system;

acquiring transmit power information about a downlink signal of the first communication system based on the configuration information; and

receiving the downlink signal from the base station based on the transmit power information,

wherein the downlink signal is transmitted through a downlink carrier of the first communication system,

wherein the downlink carrier is allocated in a specific guard-band between an in-band and a guard-band configured for a second communication system, using a Frequency Division Duplex (FDD) scheme,

wherein the guard-band comprises a low guard-band and a high guard-band,

wherein each of the low guard-band and the high guard-band comprises a first band, a second band, and a third band, and

wherein:

the second band is a band for allocating carriers of the first communication system including the downlink carrier,

the first band is a guard-band configured between the second band and a band allocated to the second communication system, and

the third band is a guard-band configured between the second band and the in-band.

2. The method of claim 1 , wherein the first communication system is a Narrowband Internet of Things (NB-IoT) system, and the second communication system is a Long Term Evolution (LTE) system operating according to a Time Division Duplex (TDD) scheme.

3. The method of claim 1 , wherein the carriers of the first communication system comprise the downlink carrier and an uplink carrier,

wherein the downlink carrier and the uplink carrier are allocated to the low guard-band and the high guard-band, respectively, or are allocated in the low guard-band or the high guard-band so as to be adjacent to each other.

4. The method of claim 1 , wherein the carriers of the first communication system are sequentially allocated within the second band, starting at a frequency far from the in-band.

5. The method of claim 1 , wherein the configuration information comprises at least one of uplink/downlink configuration information about the in-band, configuration information about a special subframe, transmission direction information about a signal of the first communication system, attribute information about a physical channel transmitted in the guard-band, a Coverage Enhancement (CE) level, and a Narrowband Reference Signal-Reference Signal Received Power (NRRS-RSRP).

6. The method of claim 5 , wherein the attribute information about the physical channel comprises information about at least one of a type, a configuration, content, and a repetition number of the physical channel.

7. The method of claim 1 , wherein transmit power of the downlink signal is adjusted by the base station,

wherein, when the second communication system is configured to operate on uplink in the in-band, transmit power of the downlink signal of the first communication system is reduced as a spacing between the downlink carrier of the first communication system and the in-band is widened.

8. The method of claim 1 , further comprising:

adjusting transmit power of a uplink signal of the first communication system based on the configuration information; and

transmitting the uplink signal having the adjusted transmit power to the base station.

9. A method for transmitting, by a base station, a signal to a terminal in a wireless communication system, the method comprising:

transmitting, to the terminal, configuration information for configuring an operation of the terminal according to a first communication system;

adjusting transmit power of a downlink signal of the first communication system based on the configuration information; and

transmitting, to the terminal, the downlink signal having the adjusted transmit power,

wherein the downlink signal is transmitted through a downlink carrier of the first communication system,

wherein the downlink carrier is allocated in a guard-band between an in-band and a guard-band configured for a second communication system, using a Frequency Division Duplex (FDD) scheme,

wherein the guard-band comprises a low guard-band and a high guard-band,

wherein each of the low guard-band and the high guard-band comprises a first band, a second band, and a third band,

wherein:

the second band is a band for allocating carriers of the first communication system including the downlink carrier;

the first band is a guard-band configured between the second band and a band allocated to the second communication system; and

the third band is a guard-band configured between the second band and the in-band.

10. A terminal for transmitting and receiving a signal to and from a base station in a wireless communication system, the terminal comprising:

a transceiver; and

a processor operatively connected to the transceiver,

wherein the processor is configured to:

control the transceiver to receive, from the base station, configuration information for configuring an operation of the terminal according to a first communication system;

acquire transmit power information about a downlink signal of the first communication system based on the configuration information; and

control the transceiver to receive the downlink signal from the base station based on the transmit power information,

wherein the downlink signal is transmitted through a downlink carrier of the first communication system,

wherein the downlink carrier is allocated in a guard-band between an in-band and a guard-band configured for a second communication system, using a Frequency Division Duplex (FDD) scheme,

wherein the guard-band comprises a low guard-band and a high guard-band,

wherein each of the low guard-band and the high guard-band comprises a first band, a second band, and a third band,

wherein:

the second band is a band for allocating carriers of the first communication system including the downlink carrier,

the first band is a guard-band configured between the second band and a band allocated to the second communication system, and

the third band is a guard-band configured between the second band and the in-band.

11. A base station for transmitting a signal to a terminal in a wireless communication system, comprising:

a transmitter; and

a processor operatively connected to the transmitter;

wherein the processor is configured to:

control the transmitter to transmit, to the terminal, configuration information for configuring an operation of the terminal according to a first communication system;

adjust transmit power of a downlink signal of the first communication system based on the configuration information; and

control the transmitter to transmit, to the terminal, the downlink signal having the adjusted transmit power,

wherein the downlink signal is transmitted through a downlink carrier of the first communication system,

wherein the downlink carrier is allocated in a guard-band between an in-band and a guard-band configured for a second communication system, using a Frequency Division Duplex (FDD) scheme,

wherein the guard-band comprises a low guard-band and a high guard-band,

wherein each of the low guard-band and the high guard-band comprises a first band, a second band, and a third band,

wherein:

the second band is a band for allocating carriers of the first communication system including the downlink carrier;

the first band is a guard-band configured between the second band and a band allocated to the second communication system; and

the third band is a guard-band configured between the second band and the in-band.