Performing cell selection procedure based on supplementary uplink (SUL) technology
A method, performed by a user equipment (UE), of transmitting and receiving signals in a wireless communication system, according to an embodiment, includes receiving a logical channel release request from a next-generation node B (gNB), determining a logical channel to release, an operation mode of the logical channel to release, and whether a packet data convergence protocol (PDCP) layer apparatus connected to the logical channel is re-established, based on the logical channel release request, and performing PDCP data recovery based on the determination result.
1 . A method performed by a terminal in a wireless communication system, the method comprising:
receiving, from a base station, system information;
if the terminal supports a supplementary uplink (SUL) frequency for a cell and if a SUL related cell selection parameter for the cell is included in the system information, obtaining the SUL related cell selection parameter included in the system information as Q rxlevmin , wherein the Q rxlevmin is a minimum required reception (RX) level in the cell;
if the terminal does not support the SUL frequency for the cell, obtaining a cell selection parameter included in the system information as the Q rxlevmin ; and
performing a cell selection procedure for the cell based on a cell selection criterion,
wherein the cell selection criterion includes a first inequality related to a cell selection reception (RX) level value and a second inequality related to a cell selection quality value, the first inequality being based on the Q rxlevmin .
2 . The method of claim 1 , wherein the performing of the cell selection procedure for the cell comprises:
determining the cell selection reception (RX) level value, based on the minimum required reception (RX) level value and a measured cell reception (RX) level value for the cell.
3 . The method of claim 1 , wherein the system information comprises remaining minimum system information (RMSI).
4 . A terminal, comprising:
a transceiver; and
a processor coupled with the transceiver and configured to:
receive, from a base station, system information;
if the terminal supports a supplementary uplink (SUL) frequency for a cell and if a SUL related cell selection parameter for the cell is included in the system information, obtain the SUL related cell selection parameter included in the system information as Q rxlevmin , wherein the Q rxlevmin is a minimum required reception (RX) level in the cell;
if the terminal does not support the SUL frequency for the cell, obtain a cell selection parameter included in the system information as the Q rxlevmin ; and
perform a cell selection procedure for the cell based on a cell selection criterion,
wherein the cell selection criterion includes a first inequality related to a cell selection reception (RX) level value and a second inequality related to a cell selection quality value, the first inequality being based on the Q rxlevmin .
5 . The terminal of claim 4 , wherein the performing of the cell selection procedure for the cell comprises:
determining the cell selection reception (RX) level value, based on the minimum required reception (RX) level value and a measured cell reception (RX) level value for the cell.
6 . The terminal of claim 4 , wherein the system information comprises remaining minimum system information (RMSI).
7 . A method performed by a base station in a wireless communication system, the method comprising:
generating system information for a cell; and
transmitting the system information, wherein, if a terminal supports a supplementary uplink (SUL) frequency for the cell and if a SUL related cell selection parameter for the cell is included in the system information, the SUL related cell selection parameter for the cell is used as Q rxlevmin for performing a cell selection procedure for the cell, wherein the Q rxlevmin is a minimum required reception (RX) level in the cell,
wherein, if the terminal does not support the SUL frequency for the cell, a cell selection parameter included in the system information is used as the Q rxlevmin for performing the cell selection procedure for the cell,
wherein the cell selection procedure for the cell is performed based on a cell selection criterion, and
wherein the cell selection criterion includes a first inequality related to a cell selection reception (RX) level value and a second inequality related to a cell selection quality value, the first inequality being based on the Q rxlevmin .
8 . The method of claim 7 , wherein the system information comprises remaining minimum system information (RMSI).
9 . A base station in a wireless communication system, the base station comprising:
a transceiver; and
a processor coupled with the transceiver and configured to:
generate system information for a cell; and
transmit the system information, wherein, if a terminal supports a supplementary uplink (SUL) frequency for the cell and if a SUL related cell selection parameter for the cell is included in the system information, the SUL related cell selection parameter for the cell is used as Q rxlevmin for performing a cell selection procedure for the cell, wherein the Q rxlevmin is a minimum required reception (RX) level in the cell,
wherein, if the terminal does not support the SUL frequency for the cell, a cell selection parameter included in the system information is used as the Q rxlevmin for performing the cell selection procedure for the cell,
wherein the cell selection procedure for the cell is performed based on a cell selection criterion, and
wherein the cell selection criterion includes a first inequality related to a cell selection reception (RX) level value and a second inequality related to a cell selection quality value, the first inequality being based on the Q rxlevmin .
10 . The base station of claim 9 , wherein the system information comprises remaining minimum system information (RMSI).