TECHNICAL FIELD

The present disclosure relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving a wireless signal.

BACKGROUND ART

Generally, a wireless communication system is developing to diversely cover a wide range to provide such a communication service as an audio communication service, a data communication service and the like. The wireless communication is a sort of a multiple access system capable of supporting communications with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). For example, the multiple access system may include one of CDMA (code division multiple access) system, FDMA (frequency division multiple access) system, TDMA (time division multiple access) system, OFDMA (orthogonal frequency division multiple access) system, SC-FDMA (single carrier frequency division multiple access) system and the like.

DISCLOSURE

Technical Problem

An object of the present disclosure is to provide a method and apparatus for efficiently performing a wireless signal transmission/reception process.

It will be appreciated by persons skilled in the art that the objects that could be achieved with the present disclosure are not limited to what has been particularly described hereinabove and the above and other objects that the present disclosure could achieve will be more clearly understood from the following detailed description.

Technical Solution

In an aspect of the present disclosure, a method of receiving a signal by a communication device in a wireless communication system includes receiving a wake-up signal (WUS) sequence in WUS resource on a carrier, wherein the WUS resource is defined by a plurality of consecutive orthogonal frequency division multiplexing (OFDM) symbols and a plurality of consecutive subcarriers, and attempting to detect a physical channel corresponding to the WUS. The WUS sequence exists in a same pattern in Nth(N>1) to last OFDM symbols of the WUS resources irrespective of a position of a frequency band of the carrier. The WUS sequence exists selectively in 1stto (N−1)thOFDM symbols of the WUS resources based on the position of the frequency band of the carrier.

In another aspect of the present disclosure, a communication device used in a wireless communication system includes a memory and a processor. The processor is configured to receive a WUS sequence in WUS resource on a carrier, wherein the WUS resource is defined by a plurality of consecutive OFDM symbols and a plurality of consecutive subcarriers, and attempt to detect a physical channel corresponding to the WUS. The WUS sequence exists in a same pattern in Nth(N>1) to last OFDM symbols of the WUS resources irrespective of a position of a frequency band of the carrier. The WUS sequence exists selectively in 1stto (N−1)thOFDM symbols of the WUS resources based on the position of the frequency band of the carrier.

The WUS resource may be defined by 14 consecutive OFDM symbols and 12 consecutive subcarriers, and N may be 4.

The WUS sequence may include a length-131 Zadoff-Chu (ZC) sequence.

When a narrowband-Internet of things (NB-IoT) mode of the user equipment (UE) is an in-band mode, the frequency band of the carrier may be located within a 3rdgeneration partnership project (3GPP) long term evolution (LTE) system band. Wherein when the NB-IoT mode of the UE is a guard-band mode or a stand-alone mode, the frequency band of the carrier may be located outside the 3GPP LTE system band.

When the NB-IoT mode of the UE is the in-band mode, no WUS sequence may exist in the first to (N−1)thOFDM symbols of the WUS resources, and wherein when the NB-IoT mode of the UE is the guard-band mode or the stand-alone mode, the same WUS sequence as in (N−1) consecutive OFDM symbols among the Nth(N>1) to last OFDM symbols of the WUS resources may exist in the first to (N−1)thOFDM symbols of the WUS resources.

N may be 4, and the (N−1) consecutive OFDM symbols may include fourth, fifth, and sixth OFDM symbols.

The physical channel corresponding to the WUS may include a physical downlink control channel (PDCCH) having a paging radio network temporary identifier (P-RNTI).

The communication device may further include a radio frequency (RF)module.

Advantageous Effects

According to the present disclosure, wireless signal transmission and reception can be efficiently performed in a wireless communication system.

It will be appreciated by persons skilled in the art that the effects that can be achieved with the present disclosure are not limited to what has been particularly described hereinabove and other advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings.

