Method and device for transmitting and receiving signals in wireless communication system
摘要
說明書
Unless otherwise specified, a signal transmission/reception operation in an unlicensed band described in the present disclosure may be performed based on all the above-described deployment scenarios.
Radio Frame Structure for Unlicensed Band
Recently, the 3GPP standardization group has proceeded to standardize a 5G wireless communication system named new RAT (NR). The 3GPP NR system has been designed to provide a plurality of logical networks in a single physical system and support services with various requirements (e.g., eMBB, mMTC, URLLC, etc.) by changing a transmission time interval (TTI) and/or an OFDM numerology (e.g., OFDM symbol duration, SCS, etc.). In recent years, data traffic has significantly increased with the advent of smart devices. Thus, the 3GPP NR system has also considered the use of an unlicensed band for cellular communication as in License-Assisted Access (LAA) of the legacy 3GPP LTE system. However, unlike the LAA, a NR cell in the unlicensed-band (NR U-cell) aims to support standalone operation. For example, PUCCH, PUSCH, and/or PRACH transmission may be supported in the NR UCell.
The NR frame structure of
