JPH09321696A - Test system for mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a test system for a mobile communication system by which automatic test is conducted economically by adding a minimum test installation to a basic installation. SOLUTION: The master equipment 3 designates one of base stations 2 as a test station, the test station sets the transmission reception channel similar to that of a mobile station 1 to make sequential communication with a plurality of adjacent base stations 2 to collect measured data. In the case that radio communication with the mobile station 1 adopts digital TDMA system communication, the base station 2 replaces transmission reception timing to replace the transmission reception channel by a timing changeover circuit 25. The base station 2 designated as the test station replaces the transmission reception channel of the signal to be sent/received and makes transmission reception of the signal with an adjacent base station 2 through the replaced transmission reception channel, collects measurement data including the electric field strength with respect to the adjacent base station 2 and speech quality and sends the data to the master equipment 3. The measured data are stored in a memory 34 as a test result by the master equipment 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a test system for a mobile communication system for confirming the operation of a wireless zone installed as a service area of a plurality of base stations housed in one main unit and wirelessly communicating with a mobile device, In particular, the present invention relates to a test system for a mobile communication system that enables economical automatic testing with a minimum of equipment.

[0002]

2. Description of the Related Art Conventionally, in a test system for a mobile communication system of this type, while a mobile unit moves within a radio zone of each base station, a test circuit on the main unit side transmits and receives a signal to and from the base station to thereby improve communication quality. The electrolytic strength and the like were checked. However, this method has a problem that it takes time and effort because the mobile device has to move in the wireless zone.

To solve this problem, a technique for automatically performing an operation test is described in, for example, Japanese Patent Publication No. 3-74978.

In this system, as shown in FIG. 5, base stations 20a, 20b, ... Which serve as a plurality of wireless zones having different frequency groups are accommodated in one main device 30, and , Test antenna 40
a, 40b, ... Are installed for the operation test of the mobile communication system in each wireless zone.

Further, the test antennas 40a, 40b, ...
The different frequency groups of the respective wireless zones transmitted and received at are combined by the hybrid 50 and connected to the test transmission / reception device 60, and the test transmission / reception device 60 performs an operation test of the mobile communication system by changing the transmission / reception frequency. ing.

[0006]

In the above-mentioned conventional test system for a mobile communication system, it is necessary to provide a test antenna for each radio zone and a hybrid for combining the input and output of the test antenna for the test. There is a problem that it is uneconomical.

An object of the present invention is to provide a test system for a mobile communication system which can economically perform an automatic test by adding a minimum of equipment to basic equipment.

[0008]

A mobile communication system test system according to the present invention is designed to confirm the operation of a wireless zone installed as a service area of a plurality of base stations accommodated in one main unit and wirelessly communicating with a mobile device. In the test system of the mobile communication system to specify one of the base stations as a test station, this test station transmits and receives signals to and from the adjacent base stations, and at least the electric field strength between these adjacent base stations and Test data is obtained by collecting measurement data including call quality.

When the wireless communication with the mobile device is digital time-division communication, when the main device designates one of the base stations as a test station, the transmission / reception channels of signals transmitted and received by this test station are exchanged. A signal is transmitted / received to / from the adjacent base station by this exchanged transmission / reception channel to collect measurement data between the adjacent base stations to obtain a test result.

[0010]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing an embodiment of the present invention. In the test method of the mobile communication system shown in FIG. 1, the TDMA (Time D
It is assumed that a plurality of base stations 2 connected by the ivision multiple access method are connected to one main device 3.

Further, each base station 2 includes a transmission / reception circuit 21, an IF circuit 22, a CPU 23, a memory 24, and a timing switching circuit 25, and the main unit 3 has an IF circuit 31, a time division switch 32, a CPU 33, a memory 34, and It is assumed that the synchronizing signal generating circuit 35 is provided.

The difference from the conventional mobile communication system test method lies in the CPU 23 and the timing switching circuit 25 of the base station 2, and the CPU 33 and the test data memory 34 of the main unit 3.

That is, the CPU 23 of the base station 2 instructs the timing switching circuit 25 to switch the transmission timing and the reception timing of the transmission / reception circuit 21 and reverse them when the test station receives the designation from the CPU 33 of the main unit 3. There is. Further, according to an instruction from the CPU 33 of the main device 3, the test station communicates with the adjacent base station, and the CPU 23 of the test station
Measures the communication status and notifies the measurement result to the CPU 33,
The CPU 33 stores the measurement result as test data in the memory 34.

Next, each component in FIG. 1 will be described.

The transmission / reception circuit 21 of the base station 2 is connected to the mobile device 1 by a radio interface according to the TDMA method, and I
ISDN (Integrated S) with the main device 3 via the F circuit 22.
ervices Digital Network). It is assumed that the CPU 23 executes the program of the base station 2 and controls the call and the communication channel, and the memory 24 stores this program. In response to an instruction from the CPU 23, the timing switching circuit 25 reverses the transmission timing of the transmission / reception circuit 21 by replacing the reception timing with the reception timing and the reception timing with the transmission timing.

The IF circuit 31 of the main unit 3 is provided for each base station 2 and is connected to the IF circuit 22 of the base station 2 by a basic interface of ISDN to transmit / receive a TDMA frame signal. The time divisional switch 32 is controlled by the CPU 33 and performs connection setting including connection between the base stations 2. C
The PU 33 executes the program of the main unit 3, performs call control and call channel control, and uses the time divisional switch 32.
And control the mobile communication system.

The memory 34 stores the control program of the CPU 33 and also records and stores the test data. Further, the synchronization signal generation circuit 35 is connected to each of the plurality of IF circuits 31 and synchronizes the TDMA frame signal transmitted / received with each of the base stations 2.

Next, the main procedure of the test operation according to FIG. 1 will be described with reference to FIG. 1 and FIG.

A wired link channel between the plurality of base stations 2 and the main unit 3 is established by a well-known procedure. Since the CPU 33 of the main device 3 tests the confirmation of the wireless zone adjacent to one base station 2, the CPU 33 of this base station 2
A change instruction to the test station is sent to PU23.

The CPU 23, which has received the instruction from the test station, instructs the timing switching circuit 25 to establish communication with the adjacent base station 2, so that the transmission / reception timing for the antenna of the transmission / reception circuit 21 is shown in FIG. So that the setting is reversed for normal communication.

That is, as in the adjacent station shown in FIG. 2, for the frequency f used by the normal base station 2, the transmission signals T1 to T4 are assigned to the time slots of the uplink channel and the downlink channel is allocated. The received signals R1 to R4 are assigned to the time slots of the above, and the plurality of base stations 2 cannot communicate with each other.

However, when set in the test station, the received signals R1 to R4 are assigned to the time slot of the upstream channel and the signal of the transmission is transmitted to the time slot of the downlink channel for the frequency f to be used. Since T1 to T4 are assigned, the relationship shown in FIG. 2 is established, and communication is possible between the test station and a plurality of adjacent stations.

In this state, the base station 2 set as the test station
The CPU 23 notifies the CPU 33 of the main device 3 that the timing switching has been completed.

Next, as shown in FIG. 3, the test station 2a
In the case of collective installation in which is included in the wireless zones of the adjacent base stations 2b and 2c, the CPU 33 of the main device 3 first establishes a wireless link and a call channel between the test station 2a and the base stations 2b and 2c. Set in the same procedure as between normal mobile units and base stations.

Then, one, for example, adjacent base station 2b
Sets the sending of the test data for measurement according to the setting of the CPU 33 of the main device 3, and sends it by the instruction. In the test station 2a, the transmission / reception circuit 21 receives the test data from the base station 2b, and the CPU 23 of the test station 2a measures the quality, electric field strength, etc. during communication, and notifies the main device 3 as measurement data.

In the main unit 3, the CPU 33 compares the received measurement data with preset thresholds of communication quality, electric field strength, etc. to judge the possibility of communication by the mobile unit 1 in the normal state and to measure the measurement result. Is stored in the memory 34 as a test result. Then, the next adjacent base station 2c is measured.

On the other hand, as shown in FIG. 4, the test station 2d
Is not included in the wireless zones of the adjacent base stations 2e and 2f and communication is not possible, the test station 2d and the adjacent base station 2
The test data cannot be exchanged between e and 2f. Therefore, the transmitter / receiver circuit 21 of the test station 2d first
Only the electric field strength of the test data transmitted from one adjacent base station 2e is measured, and the measurement result is the CPU 23 of the test station 2d.
To notify the CPU 33 of the main device 3 by the CP
U33 operates.

In the main unit 3, the CPU 33 calculates the electric field strength of the received measurement data based on the preset electric field strength data, and confirms the size of the wireless zone of the transmission source base station 2e from the calculation result. After that, the transmission of the test data to the target base station 2e is stopped, the possibility is determined, and the measurement result is stored in the memory 34 as the test result. Next, the CPU 33 performs the operation of measuring and confirming the next adjacent base station 2f.

As described above, one base station is set as the test station and the measurement test is performed using the conventional station configuration, whereby the adjacent base stations are sequentially measured and the base stations to be the test stations are sequentially measured. By moving, the functions of all the base stations and their wireless zones can be confirmed, and the test result data can be obtained from the memory of the main device.

In the above description, only the TDMA system is targeted. However, by setting one base station as a test station and making this test station the same radio interface as the mobile station,
It goes without saying that it can also be applied to tests of other mobile communication systems.

[0032]

As described above, according to the present invention, one of the base stations is designated as the test station, and this test station transmits / receives signals to / from the adjacent base stations and transmits / receives signals to / from these adjacent base stations. , The data including at least the electric field strength and the call quality are collected and tested.When the wireless communication with the mobile device is digital time division communication, the main device designates one of the base stations as the test station. A configuration in which the transmission / reception channels of the signals transmitted / received by this test station are exchanged, signals are transmitted / received to / from adjacent base stations through the exchanged transmission / reception channels, and measurement data between these adjacent base stations are collected to obtain test data. And the method is obtained.

With this configuration and method, it is possible to obtain a test system for a mobile communication system, which can economically carry out an automatic test, without carrying a mobile device and only by adding a minimum test equipment to the basic equipment.

[Brief description of drawings]

FIG. 1 is a functional block diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram of TDMA frame timing showing an embodiment of the present invention.

FIG. 3 is a system system diagram showing an embodiment of the present invention.

FIG. 4 is a system system diagram showing another embodiment of the present invention.

FIG. 5 is a functional block diagram showing an example of the related art.

[Explanation of symbols]

 1 Mobile Station 2, 2b, 2c, 2e, 2f Base Station 2a, 2d Test Station 3 Main Device 21 Transmitter / Receiver Circuit 22, 31 IF Circuit (Interface Circuit) 23, 33 CPU 24, 34 Memory 25 Timing Switching Circuit 32 Time Division Switch 35 Synchronous signal generation circuit

Claims (3)

[Claims] 1. A test method for a mobile communication system for confirming the operation of a wireless zone installed as a service area of a plurality of base stations that are housed in one main unit and wirelessly communicate with a mobile device, wherein one of the base stations is used. Is designated as a test station, the test station transmits and receives signals to and from the adjacent base stations, and collects measurement data including at least electric field strength and speech quality between the adjacent base stations to obtain test results. A test system for mobile communication systems characterized by. 2. The signal according to claim 1, wherein the wireless communication with the mobile device is digital time division communication, and when the main device designates one of the base stations as a test station, the test station transmits and receives. Of the mobile communication system, characterized in that the transmission / reception channels are exchanged, signals are transmitted / received to / from the adjacent base stations by the exchanged transmission / reception channels, measurement data between these adjacent base stations are collected, and test results are obtained. Test method. 3. The mobile communication system according to claim 2, wherein the base station includes a timing switching circuit for switching transmission / reception timings and setting transmission / reception channel switching when the main device designates the test station. System test method.