Method and apparatus for reduced capability terminal to perform random access using a plurality of search spaces and a plurality of control resource sets in mobile wireless communication system
View Patent ↗A method and apparatus for accessing a NR cell in a mobile communication system are provided. Method for accessing a NR cell includes receiving, by a terminal from a base station, a System Information Block 1 , determining, by the terminal, a preamble format and a subframe and a starting symbol based on the prach-ConfigurationIndex included in the first RACH-ConfigCommon if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon and the prach-ConfigurationIndex included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon and transmitting, by the terminal, the preamble based at least in part on the preamble format and the subframe and the starting symbol.
1. A method by a terminal, the method comprising:
receiving, by a terminal from a base station, a System Information Block 1 (SIB 1 ) based at least in part on a CORESET indicated by a 4-bit information in Master Information Block (MIB), the CORESET is associated with at least a specific frequency resource and a specific time duration, the SIB 1 includes a ServingCellConfigCommon, the ServingCellConfigCommom comprises a first RACH-ConfigCommon or the first RACH-ConfigCommon and a second RACH-ConfigCommon, each of the first RACH-ConfigCommon and the second RACH-ConfigCommon include a prach-ConfigurationIndex;
determining, by the terminal, a preamble format and a subframe and a starting symbol based on the prach-ConfigurationIndex included in the first RACH-ConfigCommon if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon and based on the prach-ConfigurationIndex included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon; and
transmitting, by the terminal, the preamble based at least in part on the preamble format and the subframe and the starting symbol.
2. The method of claim 1 ,
wherein the second RACH-ConfigCommon is placed behind the first RACH-ConfigCommon in the servingCellConfigCommon in the SIB 1 .
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 by a terminal from a base station, a System Information Block 1 (SIB 1 ) based at least in part on a CORESET indicated by a 4-bit information in Master Information Block (MIB), the CORESET is associated with at least a specific frequency resource and a specific time duration, the SIB 1 includes a ServingCellConfigCommon, the ServingCellConfigCommom may include comprises a first RACH-ConfigCommon or the first RACH-ConfigCommon and a second RACH-ConfigCommon, each of the first RACH-ConfigCommon and the second RACH-ConfigCommon include a prach-ConfigurationIndex;
determine, by the terminal, a preamble format and a subframe and a starting symbol based on the prach-ConfigurationIndex included in the first RACH-ConfigCommon if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon and based on the prach-ConfigurationIndex included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon; and
transmit, by the terminal, the preamble based at least in part on the preamble format and the subframe and the starting symbol.
4. A method by a base station, the method comprising:
transmitting in a first cell, by a base station, a System Information Block 1 (SIB 1 ) based at least in part on a CORESET indicated by a 4-bit information in Master Information Block (MIB), the CORESET is associated with at least a specific frequency resource and a specific time duration, the SIB 1 includes a ServingCellConfigCommon, the ServingCellConfigCommom comprises a first RACH-ConfigCommon or the first RACH-ConfigCommon and a second RACH-ConfigCommon, each of the first RACH-ConfigCommon and the second RACH-ConfigCommon include a prach-ConfigurationIndex;
receiving in the first cell, by the base station from a first type terminal, a preamble at least in part on the prach-ConfigurationIndex included in the first RACH-ConfigCommon; and
receiving in the first cell, by the base station from a second type terminal, a preamble based at least in part on the prach-ConfigurationIndex included in the first RACH-ConfigCommon if the second RACH-ConfigCommon is not included in the ServingCellConfigCommon and based at least in part on the prach-ConfigurationIndex included in the second RACH-ConfigCommon if the second RACH-ConfigCommon is included in the ServingCellConfigCommon.
5. The method of claim 4 ,
wherein the first type terminal is a terminal with general capability and the second type terminal is a terminal with reduced capability.