Method for performing random access process and device therefor
The present invention relates to a method for performing a random access process in a wireless communication system, and a device therefor and, more specifically, to a method and a device therefor, the method comprising the steps of: receiving narrowband physical random access channel (NPRACH) configuration information; and transmitting a random access preamble on the basis of the received NPRACH configuration information, wherein a sub-carrier spacing for the random access preamble is set to 3.75/N kHz, where N is an integer greater than or equal to 3, the random access preamble includes multiple symbol groups, the multiple symbol groups are transmitted on the basis of frequency-hopping, and a frequency-hopping distance between each of the multiple symbol groups includes a value between 3.75/N kHz and 6*3.75 kHz.
1. A method of performing a random access procedure by a user equipment in a wireless communication system, the method comprising:
receiving narrowband physical random access channel (NPRACH) configuration information; and
transmitting random access preambles repeatedly based on the received NPRACH configuration information,
wherein a subcarrier spacing for the random access preambles is set to 1.25 kHz,
wherein each of the random access preambles comprises a plurality of symbol groups including symbol group 0, symbol group 1, symbol group 2, and symbol group 3, the plurality of symbol groups being transmitted based on frequency hopping,
wherein, in each of the random access preambles, a frequency hopping distance between the symbol group 0 and the symbol group 1 and a frequency hopping distance between the symbol group 2 and the symbol group 3 are set to 1.25 kHz, and wherein a frequency hopping distance between the symbol group 1 and the symbol group 2 is set to 6*3.75 kHz, and
wherein a frequency hopping distance between the symbol group 3 in one of the random access preambles and the symbol group 0 in a next random access preamble is set to 3*3.75 kHz.
2. The method of claim 1 , wherein an NPRACH resource comprises 36 subcarriers, and
wherein the frequency hopping is performed within the 36 subcarriers.
3. A user equipment for performing a random access procedure in a wireless communication system, the user equipment comprising:
a radio frequency (RF) transceiver; and
a processor operatively connected to the RF transceiver,
wherein the processor is configured to:
receive narrowband physical random access channel (NPRACH) configuration information, and transmit random access preambles repeatedly based on the received NPRACH configuration information,
wherein a subcarrier spacing for the random access preambles is set to 1.25 kHz,
wherein each of the random access preambles comprises a plurality of symbol groups including symbol group 0, symbol group 1, symbol group 2, and symbol group 3, the plurality of symbol groups being transmitted based on frequency hopping,
wherein, in each of the random access preambles, a frequency hopping distance between the symbol group 0 and the symbol group 1 and a frequency hopping distance between the symbol group 2 and the symbol group 3 are set to 1.25 kHz, and wherein a frequency hopping distance between the symbol group 1 and the symbol group 2 is set 6*3.75 kHz, and,
wherein a frequency hopping distance between the symbol group 3 in one of the random access preambles and the symbol group 0 in a next random access preamble is set to 3*3.75 kHz.
4. The user equipment of claim 3 , wherein an NPRACH resource comprises 36 subcarriers,
wherein the frequency hopping is performed within the 36 subcarriers.