Apparatus and method for inter-rat measurement in a multi mode terminal station

An operating method of a multihop terminal that supports at least two Radio Access Technologies (RATs), the method comprising:

• when a measurement condition is satisfied, turning on, at an operating module, a standby module and generating a time latch signal to the standby module at a time T0;
• latching, at the standby module, a time according to the time latch signal and reporting the latched time value to the operating module;
• sending, at the operating module, a measurement request message comprising measurement parameter information and offset information between the time T0 and antenna switching times T2 and T5 to the standby module;
• and
• setting, at the standby module, a time interrupt using the information of the measurement message and performing inter-RAT measurement according to the time interrupt.

An operating method of a multihop terminal that supports at least two Radio Access Technologies (RATs), the method comprising:

• when a measurement condition is satisfied, turning on, at an operating module, a standby module;
• calculating, at the operating module, offset values of antenna switching times T2 and T5 based on a time T0 and sending a measurement request message comprising measurement parameter information and offset information of the time T0 and the antenna switching times T2 and T5 to the standby module;
• generating, at the operating module, a trigger signal to the standby module at the time T0;
• and
• setting, at the standby module, a time interrupt using a reception time of the trigger signal and the information of the measurement request message and performing inter-RAT measurement according to the time interrupt.

An apparatus for supporting at least two Radio Access Technologies (RATs) at a multimode terminal, the apparatus comprising:

• a first trigger generator configured to generate a time latch signal to a standby module at a time T0 when the standby module is turned on;
• a second time latch controller configured to latch a time according to the time latch signal and reporting the latched time value to an operating module;
• a first dual mode controller configured to send a measurement request message comprising measurement parameter information and offset information of the time T0 and antenna switching times T2 and T5 to the standby module;
• and
• a second dual mode controller configured to set a time interrupt using information of the measurement message and perform inter-RAT measurement according to the time interrupt.

An apparatus that supports at least two Radio Access Technologies (RATs) at a multimode terminal, the apparatus comprising:

• a first dual mode controller configured to turn on a standby module when a measurement condition is satisfied, calculate offset values of antenna switching times T2 and T5 based on a time T0, and send a measurement request message comprising measurement parameter information and offset information of the time T0 and the antenna switching times T2 and T5 to the standby module;
• a trigger signal generator configured to generate a trigger signal to the standby module at the time T0;
• and
• a second dual mode controller configured to set a time interrupt using a reception time of the trigger signal and the information of the measurement request message and performing inter-RAT measurement according to the time interrupt.