Radio terminal test apparatus and radio terminal test method
A radio terminal test apparatus that tests radio communication performance of a radio terminal, the apparatus including: a radio signal processing unit that performs measurement processing on a radio signal transmitted from the radio terminal and acquires measurement data; a communication control unit that transmits and receives data to and from the radio signal processing unit; and a bus that connects the radio signal processing unit and the communication control unit. The radio signal processing unit includes a division determination unit that determines necessity of division of the measurement data, and, when the division determination unit determines that the measurement data needs to be divided, the measurement data is divided, and divided pieces of the measurement data are division-transmitted a plurality of times from the radio signal processing unit to the communication control unit via the bus.
1 . A radio terminal test apparatus that tests radio communication performance of a radio terminal, the apparatus comprising:
a radio signal processing unit that performs measurement processing on a radio signal transmitted from the radio terminal and acquires measurement data;
a communication control unit that transmits and receives data to and from the radio signal processing unit; and
a bus that connects the radio signal processing unit and the communication control unit,
wherein the radio signal processing unit includes a division determination unit that determines necessity of division of the measurement data, and
when the division determination unit determines that the measurement data needs to be divided, the measurement data is divided, and divided pieces of the measurement data are division-transmitted a plurality of times from the radio signal processing unit to the communication control unit via the bus.
2 . The radio terminal test apparatus according to claim 1 , wherein
the division determination unit determines the necessity of the division of the measurement data by determining whether or not the measurement data acquired by the radio signal processing unit is larger than volume of a data transmission and reception region allocated in a memory of the communication control unit.
3 . The radio terminal test apparatus according to claim 1 , wherein
the radio signal processing unit further includes a condition storage unit that stores a measurement condition, and
the division determination unit
calculates, in advance, volume of measurement data scheduled to be acquired by the radio signal processing unit, based on the measurement conditions, and
determines the necessity of the division of the measurement data by determining whether or not the calculated volume is larger than volume of a data transmission and reception region allocated in a memory of the communication control unit.
4 . The radio terminal test apparatus according to claim 1 , wherein
the radio signal processing unit further includes a data division unit that, when the division determination unit determines that the measurement data needs to be divided, calculates the number of divisions N of the measurement data by an expression N=ROUNDUP(V 1 /V 2 ), and divides the measurement data in accordance with the number of divisions, where V 1 indicates volume of the measurement data, V 2 indicates volume of a data transmission and reception region allocated in a memory of the communication control unit, and ROUNDUP indicates rounding-up processing.
5 . The radio terminal test apparatus according to claim 1 , wherein
the radio signal processing unit acquires measurement data of equivalent isotropically radiated power (EIRP) at each angle sample point by entire spherical surface scanning of the radio terminal that performs radio communication in accordance with a communication standard using carrier aggregation.
6 . The radio terminal test apparatus according to claim 1 , further comprising:
a communication protocol processing unit that is connected to the bus and generates transmission data based on a communication protocol defined by a specific communication standard; and
a baseband signal processing unit that is connected to the bus and generates a baseband signal from the transmission data,
wherein the radio signal processing unit
generates a radio-frequency test signal from the baseband signal,
transmits the radio-frequency test signal to the radio terminal via a test antenna, and
receives a radio signal transmitted from the radio terminal that has received the radio-frequency test signal.
7 . A radio terminal test system that tests radio communication performance of a radio terminal, the system comprising:
a radio terminal test apparatus including
a radio signal processing unit that performs measurement processing on a radio signal transmitted from the radio terminal and acquires measurement data,
a communication control unit that transmits and receives data to and from the radio signal processing unit, and
a bus that connects the radio signal processing unit and the communication control unit,
in which the radio signal processing unit includes a division determination unit that determines necessity of division of the measurement data, and, when the division determination unit determines that the measurement data needs to be divided, the measurement data is divided, and divided pieces of the measurement data are division-transmitted a plurality of times from the radio signal processing unit to the communication control unit via the bus;
a control device that transmits and receives data to and from the communication control unit via a network;
an anechoic box;
a positioner that is accommodated in the anechoic box and controls a posture of the radio terminal under control of the control device; and
a test antenna that is accommodated in the anechoic box and performs radio communication with the radio terminal,
wherein, while the positioner performs entire spherical surface scanning of the radio terminal under control of the control device, the radio signal processing unit measures power of a radio signal radiated from an antenna of the radio terminal via the test antenna.
8 . The radio terminal test system according to claim 7 , wherein
the control device includes a calculation unit that calculates total radiated power (TRP) of the radio terminal from the measurement data acquired by the radio signal processing unit.
9 . A radio terminal test method in a radio terminal test apparatus that includes a radio signal processing unit that performs measurement processing on a radio signal transmitted from a radio terminal and acquires measurement data, a communication control unit that transmits and receives data to and from the radio signal processing unit, and a bus that connects the radio signal processing unit and the communication control unit, and tests radio communication performance of the radio terminal, the method comprising:
a division determination step of determining necessity of division of the measurement data;
a data division step of, when it is determined in the division determination step that the measurement data needs to be divided, calculating the number of divisions and dividing the measurement data in accordance with the number of divisions; and
a data transmission step of division-transmitting divided pieces of the measurement data from the radio signal processing unit to the communication control unit in a plurality of times via the bus.