Method and apparatus for base station to perform random access procedure with reduced capability terminal using a plurality of common configurations and a single time alignment timer in mobile wireless communication system
A method and apparatus for accessing a NR cell in a mobile communication system are provided. Method for accessing a NR cell includes receiving in a first cell, by a terminal from a base station, a System Information Block1, monitoring, by the terminal, Physical Downlink Control Channel (PDCCH) for Random Access Response based at least in part on a specific ra-ResponseWindow and a specific ra-SearchSpace.
1 . A method by a terminal, the method comprising:
receiving in a first cell, by a terminal from a base station, a System Information Block1 (SIB1); and
monitoring, by the terminal, Physical Downlink Control Channel (PDCCH) for Random Access Response based at least in part on a specific ra-ResponseWindow and a specific ra-SearchSpace,
wherein the SIB1 includes a ServingCellConfigCommon, the ServingCellConfigCommon includes a first RACH-ConfigCommon and optionally a second RACH-ConfigCommon and a first PDCCH-ConfigCommon and optionally a second PDCCH-ConfigCommon,
wherein the first RACH-ConfigCommon includes a first ra-ResponseWindow and the second RACH-ConfigCommon includes a second ra-ResponseWindow,
wherein the first PDCCH-ConfigCommon includes a first ra-SearchSpace and the second PDCCH-ConfigCommon includes a second ra-SearchSpace,
wherein the second RACH-ConfigCommon and the second PDCCH-ConfigCommon are parameters for a second type terminals,
wherein the specific ra-ResponseWindow is the first ra-ResponseWindow if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon, and the specific ra-ResponseWindow is the second ra-ResponseWindow included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon, and
wherein the specific ra-SearchSpace is the first ra-SearchSpace if the second PDCCH-ConfigCommon is not included in the servingCellConfigCommon and the specific ra-SearchSpace is the second ra-SearchSpace in the second PDCCH-ConfigCommon if the second PDCCH-ConfigCommon is included in the servingCellConfigCommon.
2 . The method of claim 1 ,
wherein the second type terminal supports 20 MHz bandwidth and a first type terminal supports 100 MHz bandwidth.
3 . A terminal in a wireless communication system, the terminal comprising:
a transceiver configured to transmit and receive a signal; and
a controller configured to control the transceiver to:
receive in a first cell from a base station a System Information Block1 (SIB1) and
monitor Physical Downlink Control Channel (PDCCH) for Random Access Response based at least in part on a specific ra-ResponseWindow and a specific ra-SearchSpace,
wherein the SIB1 includes a ServingCellConfigCommon, the ServingCellConfigCommon includes a first RACH-ConfigCommon and optionally a second RACH-ConfigCommon and a first PDCCH-ConfigCommon and optionally a second PDCCH-ConfigCommon,
wherein the first RACH-ConfigCommon includes a first ra-ResponseWindow and the second RACH-ConfigCommon includes a second ra-Response Window,
wherein the first PDCCH-ConfigCommon includes a first ra-SearchSpace and the second PDCCH-ConfigCommon includes a second ra-SearchSpace,
wherein the second RACH-ConfigCommon and the second PDCCH-ConfigCommon are parameters for a second type terminals,
wherein the specific ra-ResponseWindow is the first ra-ResponseWindow if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon, and the specific ra-ResponseWindow is the second ra-ResponseWindow if the second RACH-ConfigCommon is included in the ServingCellConfigCommon, and
wherein the specific ra-SearchSpace is the first ra-SearchSpace if the second PDCCH-ConfigCommon is not included in the servingCellConfigCommon and the specific ra-SearchSpace is the second ra-SearchSpace if the second PDCCH-ConfigCommon is included in the servingCellConfigCommon.
4 . A method by a base station, the method comprising:
transmitting in a first cell, by a base station, a System Information Block1 (SIB1); and
transmitting, by the base station to a second type terminal, Physical Downlink Control Channel (PDCCH) for Random Access Response based at least in part on a specific ra-ResponseWindow and a specific ra-SearchSpace,
wherein the SIB1 includes a ServingCellConfigCommon, the ServingCellConfigCommon includes a first RACH-ConfigCommon and optionally a second RACH-ConfigCommon and a first PDCCH-ConfigCommon and optionally a second PDCCH-ConfigCommon,
wherein the first RACH-ConfigCommon includes a first ra-ResponseWindow and the second RACH-ConfigCommon includes a second ra-Response Window,
wherein the first PDCCH-ConfigCommon includes a first ra-SearchSpace and the second PDCCH-ConfigCommon includes a second ra-SearchSpace,
wherein the second RACH-ConfigCommon and the second PDCCH-ConfigCommon are parameters for a second type terminals,
wherein the specific ra-ResponseWindow is the first ra-ResponseWindow if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon, and the specific ra-ResponseWindow is the second ra-ResponseWindow included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon, and
wherein the specific ra-SearchSpace is the first ra-SearchSpace if the second PDCCH-ConfigCommon is not included in the servingCellConfigCommon and the specific ra-SearchSpace is the second ra-SearchSpace in the second PDCCH-ConfigCommon if the second PDCCH-ConfigCommon is included in the servingCellConfigCommon.