JP2000209165A - Transmission reception test method and device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transmission reception test method and its device where much time is not required for the test and deterioration in service traffic is not caused. SOLUTION: In the transmission reception test to confirm normality of a plurality of radio equipments in a radio base station device, a transmission radio wave and a reception local frequency are switched to conduct test in a radio idle time slot by control processing in the unit of time slots. The device is provided with a local section 12 that outputs transmission and reception local frequencies by a channel designation signal and switches the frequency at a high speed, a transmission section 13/a reception section 14 that confirm the normality of the transmission wave/reception wave of the radio equipments, and a control section 15 that outputs modulation data to the transmission section 13 for each prescribed time slot and channel designation data to the local section 12 respectively and processes demodulation data from the reception section 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission / reception test apparatus, and more particularly, to a transmission / reception test apparatus for confirming normality of a plurality of radios in a radio base station apparatus.

[0002]

2. Description of the Related Art A conventional transmission / reception test apparatus checks the normality of a plurality of radios in a radio base station apparatus via radio.

[0003]

However, since all the radios in the radio base station apparatus are checked in frequency units, it is inevitable that a long time is required for the test. In addition, a large amount of time is consumed, resulting in a decrease in service traffic.

An object of the present invention is to provide a transmission / reception test method and apparatus which do not require much time for a test and do not cause a decrease in service traffic.

[0005]

In order to achieve the above object, a transmission / reception test method according to the present invention is directed to a transmission / reception test method for confirming normality of a plurality of radios in a radio base station apparatus. Is characterized in that the test is performed by switching the transmission radio wave and the reception local frequency during the wireless free time slot.

[0006] With the above configuration, in a transmission / reception test method for confirming normality of a plurality of wireless devices in a wireless base station apparatus, a control process is performed in units of time slots to transmit and receive radio waves during a wireless free time slot. The local frequency is switched and the test is performed. As a result, the test does not take much time and the traffic on the service is not reduced.

Further, the transmission / reception test method according to the present invention can realize the transmission / reception test method.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a transmission / reception test apparatus according to an embodiment of the present invention. As shown in FIG. 1, a transmission / reception test apparatus 10 includes a duplexer (DUP)
11, a local (LOCAL) unit 12, a transmission unit 13, a reception unit 14, and a control unit 15.

[0010] The duplexer 11 is provided corresponding to the antenna 16 that shares transmission and reception. The LOCAL section 12
A LOCAL frequency for transmission and a LOCAL frequency for reception are output by a channel designation signal, and frequency switching is performed at high speed. The transmission unit 13 includes a modulation unit 18 that modulates modulation data to a LOCAL frequency to generate a transmission wave, and an amplification unit 17 that power-amplifies the transmission wave.

[0011] The receiving section 14 mixes an input received wave and a LOCAL frequency to obtain a predetermined IF (Intermedia).
a.Frequency) signal, and a demodulation unit 20 for demodulating the IF signal into data.
Is provided. The control unit 15 outputs the modulation data to the transmission unit 13 for each predetermined time slot and the channel designation data to the LOCAL unit 12, respectively, and also processes the demodulated data from the reception unit 14.

Next, this transmission / reception test apparatus 10 uses TDMA-FDD (Time Divis) as an access method.
ion Multiple Access-Frequ
An example is shown in which the present invention is applied to a half-rate digital mobile communication system adopting an "ency Division Duplex" system.

FIG. 2 is a connection diagram of the transmission / reception test device, the radio base station device, and the exchange of FIG. 1, and FIG. 3 is an explanatory diagram of a radio zone of the transmission / reception test device and the radio base station device of FIG. .

As shown in FIG. 2, the radio base station device 21
The wireless device 22 includes three sectors of wireless devices 22, and each wireless device 22 and the transmission / reception test device 10 are connected by a wire via an exchange 23. Here, the exchange 23 is a wireless base station device 21.
Operating status / operating frequency and transmission / reception test equipment (TTR)
All 10 accesses are controlled. Then, the transmission / reception test device 10 confirms the normality of the plurality of wireless devices (TRX) 22-1a to 3n inside the wireless base station device 21 via wireless.

As shown in FIG. 3, this radio base station apparatus 2
The three antennas 24 have directivity and have a three-sector configuration, and the corresponding TRX 22
Are TRXs 22-1a to 1n and sector 2 is TRX22-2
a to 2n, and sector 3 is TRX22-3a to 3n.
On the other hand, the antenna 16 of the TTR 10 is non-directional.

In order to perform wireless communication with each other, the output power of the wireless base station device 21 and the output power of the TTR 10 are input via a spatial propagation loss determined by a physical distance so as to be in a communicable state. It is installed in.

Therefore, the TTR 10 is provided with a transmission unit 13 / reception unit 14 for confirming a transmission wave (downlink radio wave) / reception wave (uplink radio wave) of the TRX 22. In addition,
The access frequency of the TRX 22 is determined in advance.

To confirm the normality of TRX22-1a,
First, the transmission system is confirmed. The transmission wave (f1a) of the TRX 22-1a transmitted from the antenna of the wireless base station device 21
(= 820 MHz) is input as a received wave by the antenna 16 of the TTR 10, and then the unnecessary wave is removed by the DUP 11 and input to the IF converter 19 of the receiver 14.

At this time, the LOCAL section 12 controls the control section 1
5 according to the channel designation data from
L frequency (950MHz = 820MHz + 130MH)
z), and the received wave is converted to a predetermined IF frequency (130 MHz). The converted IF frequency is demodulated by the demodulation unit 20 and sent to the control unit 15.

The control unit 15 confirms whether the modulation data of the TRX 22-1a matches the demodulation data of the reception unit 14, and whether the reception input level is within a predetermined value. The confirmation of the normality in the transmission system operation is completed.

Next, the reception system is confirmed. The control unit 15 of the TTR 10 transmits predetermined channel designation data to the LOCAL unit 12 to transmit the LOCAL frequency (f1a = 950).
MHz). This LOCAL frequency and the control unit 1
The modulation data from 5 is modulated by the modulation unit 18 of the transmission unit 13 to generate a modulated wave (transmission wave).

The generated transmission wave is power-amplified by the amplifying unit 17 and then transmitted from the antenna 16 via the DUP 11 for removing unnecessary waves. This transmission wave is received by the antenna of the wireless base station device 21 and supplied to the TRX 22-1a. The TRX 22-1a checks whether the modulation data from the control unit 15 and the demodulated data at the TRX 22-1a match, and whether the reception level is within a predetermined value. Check the normality of the operation. Thus, the confirmation of the TRX 22-1a is completed.

The initial conditions for performing this operation are as follows:
Propagation loss between antennas and input / output levels of each device are required. For example, the inter-antenna space propagation loss of sector 1 is 1
00 dB, the output of the radio base station apparatus 21 from the TTR 10 and the TRX 22 is 1 W (30 dBm), the modulation data is (000000 ...), and the receivable dynamic range of the TTR 10 and the TRX 22 is −115 dBm to −50.
Under the condition of dBm, the input electric field values of the TTR 10 and the TRX 22 are 30 dBm−100 dB = −70 dBm
Is ready to be input. This value is stored in the TTR 10 as a default value of the sector 1.

Similarly, since the spatial propagation loss between antennas is 90 dB for sector 2 and 110 dB for sector 3, the default values for sectors 2 and 3 are respectively -60 dB.
m, −80 dBm, and the modulation data value to (101010
..) And (111111...). This default value varies depending on the loss between antennas and the output of the device.

According to the present invention, these operations can be changed according to the traffic of the system and the number of mounted TRXs 22. For example, when the A mounting panel of each sector is not operated due to traffic conditions, , TT
According to R10, each TRX 22-1a, 2 for three sectors
The normality of a and 3a can be simultaneously confirmed.

FIG. 4 is a flowchart showing a test flow by the transmission / reception test apparatus of FIG. FIG. 5 shows L in FIG.
FIG. 7A is a diagram illustrating a spectrum when a blank is used as an output timing, and FIG. 7B is a diagram illustrating a spectrum when a wireless time slot is used as an output timing. FIG. 6 shows a wireless time slot of the transmission / reception test apparatus of FIG.
(A) is an explanatory diagram when the traffic state is 3 sectors,
(B) is an explanatory diagram of a traffic state of only one sector.

As shown in FIG. 4, first, TRX2
Confirm the transmission system of 2. At this time, as the preparation on the TRX 22 side, the operating frequency / modulation data / time slot of the TRXs 22-1a to 3a are determined, and the time division transmission is enabled. That is, TRX22-1a is f1
a / 0000 ../ time slot (TS) 0, TRX
22-2a is f2a / 1010 ... / TS2, TRX2
2-3a is f3a / 1111 /./ TS4 (step S101).

On the other hand, in preparation for the TTR 10 as a receiving system, a receiving frequency / demodulated data / receiving time slot is determined, and a time-division reception is enabled (step S102). At this time, TS1, T1 of TTR10
The times of S3 and TS5 are times required for switching the frequency of the LOCAL section 12 so that different transmission frequencies of the TRXs 22-1a to 3a can be received. LOCAL
The unit 12 has a PLL configuration that can be switched at TS = 6.7 ms or less, for example, at 2 ms.

After completing the above preparations, confirmation of the transmission system of the TRX 22 is started (step S103). TR at the beginning
X21-1a, 2a, and 3a are output in this order and transmission is started. At this time, a blank for one TS is used between 1a and 2a and between 2a and 3a (see FIG. 5).
(See (a)).

The TTR 10 on the receiving side starts receiving, and determines whether the reception is normal or abnormal based on the reception level ≧ threshold (1a → 2a → 3a) (step S104), and demodulated data = modulated data (1a → 2a → 3a). ) To determine whether it is normal or abnormal (step S105).

That is, in the receiving TTR 10, TRX2
During reception of 2-1a, a predetermined electric field value / demodulated data is -7.
If 0 dBm / 0000..., It is determined to be normal.

Next, the TTR 10 uses the LOC based on the channel designation data capable of receiving the frequency of the TRX 22-2a.
It is sent to the AL unit 12 and locked (see FIG. 5A). Thereby, during reception of TS3, TRX22-2
a predetermined electric field value / a demodulated data is -60 dBm / 101
If it is 0 ..., it is determined to be normal.

Next, the TTR 10 uses the LOC based on channel designation data capable of receiving the frequency of the TRX 22-3a.
It is sent to the AL unit 12 and locked (see FIG. 5A). As a result, during the reception of TS5, TRX22-3a
Is predetermined electric field value / demodulated data of -80 dBm / 1111
If it is ..., it is determined to be normal.

In each of the above determinations, if an abnormality occurs on the way, the process returns to step S103, and the test is repeated up to two times. If both cases are abnormal, a report is made to the exchange 23.

With the above, confirmation of the normality of the transmission system in the TRXs 22-1a to 3a is completed, and subsequently, confirmation of the reception system of the TRX 22 is performed (step S106).

At this time, the demodulated data / time slot is determined as a preparation on the TRX 22 side, and a time-division reception is enabled. That is, TRX22-1a is 00
00 /./ TS0 and TRX22-2a are 1010 ///
TS2 and TRX22-3a are 1111... / TS4 (step S107).

On the other hand, in preparation for the TTR 10 as a transmission system, a transmission frequency / modulation data / transmission time slot is determined, and a time division transmission is enabled (step S108). At this time, TS1, T1 of TTR10
The times of S3 and TS5 are times for switching the transmission frequency so that different reception frequencies of the TRXs 22-1a to 3a can be received (see FIG. 6A).

After the above preparation is completed, confirmation of the receiving system of the TRX 22 is started (step S109). First TT
R10 is output in the order of TS0-TS2-TS4. At this time, the timing of TS1, TS3 and TS5 is 1TS
Minute blank (no output state) is used.

The TRX 22-1a on the receiving side starts receiving, and determines whether the reception level ≧ the threshold (1a → 2a → 3a) as normal or abnormal (step S110), and demodulated data = modulated data (1a → 2a). → Judgment as to whether it is normal or abnormal according to 3a) (step S111).

That is, in the TRX 22-1a on the receiving side, T
The predetermined electric field value / demodulated data is -70 dB during reception of S0.
If m / 0000..., it is determined to be normal.

Next, the TTR 10 establishes a TRX2 between the TS1s.
2-2a receives LO according to channel designation data receivable
It is sent to the CAL unit 12 and locked. This gives T
If the predetermined electric field value / demodulated data of the TRX 22-2a is −60 dBm / 1010... During the reception of S2, it is determined to be normal.

Next, the TTR 10 sets TRX2 between TS4.
According to channel designation data receivable by 2-3a, LO
It is sent to the CAL unit 12 and locked. This gives T
If the predetermined electric field value / demodulated data of the TRX 22-3a is −80 dBm / 1111,.

Thus, the confirmation of the normality of the receiving systems of the TRXs 22-1a to 3a is completed. If an abnormality occurs on the way, the test is repeated up to twice. All the results are reported to the exchange 23. Thereby, TRX22-1a-3a
Confirmation of the transmission system and the reception system is completed.

Such an operation can be performed even when the A to C mounting panels in which the traffic state is only the sector 1 are not operated, so that the TTR 10 can operate the TRX 22-1 for one sector.
1a, 1b, and 1c are in units of wireless time slots (FIG. 5)
(See (b)) and normality can be confirmed by repeating the LOCAL frequency shift. TTR at this time
10 time slot states, ie, TS1, TS3, T
The time of S5 is a time for switching the transmission frequency (see FIG. 6B).

As described above, according to the present invention, the transmission / reception test apparatus 10 controls the transmission unit 13, the reception unit 14, and the LOCAL unit 12 by the control unit 15 for each time slot, so that the wireless free time slot By switching the transmission radio wave and the reception local frequency during the test, a plurality of different TRXs 22 can be tested at the same time, and the test time can be reduced.

Since the shortening of the test time leads to the shortening of the closing time of the TRX 22, the traffic processing of the radio base station apparatus 21 can be serviced with a minimum reduction.

In the above embodiment, a plurality of DUPs 11 of the transmission / reception test apparatus 10 may be provided. DUP1
If a plurality of 1s are provided, it is possible to process the TRXs 22 in different frequency bands only by changing the LOCAL section 12 to widen the band.

[0048]

As described above, according to the present invention, in the transmission / reception test method for confirming the normality of a plurality of wireless devices in a wireless base station apparatus, the wireless idle time is controlled by the control processing in units of time slots. Since the transmission radio wave and the reception local frequency are switched during the slot and the test is performed, the test does not take much time and the traffic on the service is not reduced.

Further, the transmission / reception test method according to the present invention can realize the transmission / reception test method.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a transmission / reception test device according to an embodiment of the present invention.

FIG. 2 is a connection diagram of the transmission / reception test device, the radio base station device, and the exchange in FIG. 1;

FIG. 3 is an explanatory diagram of a wireless zone of the transmission / reception test device and the wireless base station device of FIG. 1;

FIG. 4 is a flowchart showing a test flow by the transmission / reception test device of FIG. 1;

5A and 5B are diagrams illustrating a case where a frequency is switched in a LOCAL section of FIG. 1; FIG. 5A is a diagram illustrating a spectrum when a blank is used as an output timing; FIG. 5B is a diagram illustrating a spectrum when a wireless time slot is used as an output timing; It is.

6A and 6B show wireless time slots of the transmission / reception test apparatus of FIG. 1, where FIG. 6A is an explanatory diagram when the traffic state is 3 sectors, and FIG. 6B is an explanatory diagram when the traffic state is only 1 sector.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 transmission / reception test device 11 transmission / reception duplexer 12 LOCAL unit 13 transmission unit 14 reception unit 15 control unit 16 antenna 17 amplification unit 18 modulation unit 19 IF conversion unit 20 demodulation unit 21 wireless base station device 22, 22-1a to 3n radio device 23 Exchange 24 antenna

Claims (6)

[Claims] In a transmission / reception test method for confirming normality of a plurality of wireless devices in a wireless base station device, a transmission radio wave and a reception local frequency are switched during a wireless free time slot by a control process in time slot units. A transmission / reception test method characterized by performing a test. 2. The transmission / reception test method according to claim 1, wherein the test is changed in accordance with the traffic of the system and the number of mounted radios. 3. The transmission / reception test method according to claim 2, wherein the local frequency is output in a wide band. 4. A transmission / reception test apparatus for checking the normality of a plurality of radios in a radio base station apparatus, wherein a local frequency for transmission and reception is output by a channel designation signal, and a local frequency for high-speed frequency switching is provided. A transmitting unit that checks the normality of the transmission wave of the wireless device, a receiving unit that checks the normality of the receiving wave of the wireless device, and the transmitting unit modulates data for each predetermined time slot.
A transmission / reception test apparatus comprising: a control unit that outputs channel designation data to the local unit and processes demodulated data from the reception unit. 5. The transmitting unit includes: a modulating unit that modulates modulation data to a local frequency to generate a transmission wave; and an amplifying unit that power-amplifies the transmission wave. An IF converter for outputting a predetermined IF signal by mixing with a frequency;
The transmission / reception test apparatus according to claim 4, further comprising a demodulation unit that demodulates the F signal into data. 6. A transmission / reception test apparatus according to claim 4, wherein the radio equipment provided in the radio base station apparatus is connected by a wire via an exchange, and is accessed by a TDMA-FDD method. Rate digital mobile communication system.