Method and apparatus for on demand synchronization signal block transmission and reception in mobile wireless communication system

A terminal in a wireless communication system, the terminal comprising:

• a transceiver configured to transmit and receive signals;
• and
• a controller configured to control the transceiver to:
• receive, from a base station, a radio resource control (RRC) message, wherein the RRC message comprises a set of configuration parameters for a secondary cell;
• determine, based on the presence of a specific parameter in the set of configuration parameters for the secondary cell, that on-demand Synchronization Signal Block (SSB) transmission is activated in the secondary cell;
• and
• apply:
• a first set of SSB-related parameters to perform reception of on-demand SSB transmission, wherein the first set of SSB-related parameters comprises a first parameter for SSB periodicity, a first parameter for SSB power, and a parameter for SSB position;
• and
• a second set of SSB-related parameters to perform reception of always-on SSB transmission, wherein the second set of SSB-related parameters comprises a second parameter for SSB periodicity, a second parameter for SSB power, and the parameter for SSB position,
• wherein the first set of SSB-related parameters and the second set of SSB-related parameters are included in the set of configuration parameters for the secondary cell.

A method performed by a base station, the method comprising:

• determining, by the base station, to activate on-demand Synchronization Signal Block (SSB) transmission in a specific secondary cell of a terminal;
• configuring, by the base station, the presence of a specific parameter in a set of configuration parameters for the specific secondary cell;
• transmitting, by the base station to the terminal, a radio resource control (RRC) message, wherein the RRC message comprises the set of configuration parameters for the specific secondary cell;
• and
• applying, by the base station:
• a first set of SSB-related parameters to enable the terminal to perform reception of on-demand SSB transmission, wherein the first set of SSB-related parameters comprise a first parameter for SSB periodicity, a first parameter for SSB power, and a parameter for SSB position;
• and
• a second set of SSB-related parameters to enable the terminal to perform reception of always-on SSB transmission, wherein the second set of SSB-related parameters comprises a second parameter for SSB periodicity, a second parameter for SSB power, and the parameter for SSB position,
• wherein the first set of SSB-related parameters and the second set of SSB-related parameters are included in the set of configuration parameters for the secondary cell.