METHOD AND DEVICE FOR APPLYING VALUE ON BASIS OF COVERAGE EXTENSION LEVEL

摘要

A method performed by a wireless device in a wireless communication system includes receiving multiple thresholds from a base station (BS); measuring a quality of a cell; determining a coverage enhancement (CE) level of the wireless device based on the multiple thresholds and the measured quality of the cell; receiving random access channel (RACH) information including at least one window size value and at least one timer value for contention resolution, from the BS; selecting a window size value and a timer value among the RACH information based on the determined CE level; transmitting a first message for the RACH to the BS; receiving a second message for the RACH based on the selected window size value, from the BS; and starting a timer for contention resolution based on the selected timer value regarding a third message for the RACH. Further, the CE level is determined as a CE level 0, when the measured quality is above or equal to all of the multiple thresholds.