JPH02241192A - Wireless pseudo call processor - Google Patents

Abstract

PURPOSE:To arbitrarily connect a processor to each repeater in a wireless channel controller, and to miniaturize the processor by setting a time division exchange which simulates wireless channel setting. CONSTITUTION:Each pseudo mobile station device 15 controls an outgoing call and an incoming call, confirms the connection of a channel, a controller 17 controls a time division exchange 13 to simulate the wireless channel setting and the pseudo mobile station device 15 to simulate the wireless line and to set a hand-off condition, thus functions are distributed, and further respective signals are digitized, time-divided, and multiplexed. Consequently by separating an A/D-D/A converter 11 and time-division multiplexing/demultiplexing circuit 12 from the other parts, and arranging them near a wireless channel controller 2 to be a device to be tested, the separated parts can be connected to the other parts by a single connecting cable. Thus the whole device can be miniaturized, and the connection to the wireless channel controller 2 can be simplified.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a wireless pseudo call processing device, and more particularly to a wireless pseudo call processing device for testing the call processing ability of a radio line control device and an upper-level switch in a car telephone system. Regarding.

[Conventional technology]

The base station of a car telephone system is equipped with a radio line control device that relays and controls voice signals and line control signals between the exchange that is the upper station and the base station's radio equipment, and also controls the radio equipment. There is.

Conventionally, a subscriber for a pseudo call test is registered in the subscriber data of an exchange, and the radio line controller software generates a pseudo call with a delay peculiar to the radio line to test the call processing ability of the exchange. was. However, this test can only simulate call origination and call response, and it is not only possible to confirm calls, but also to perform complex processing functions unique to radio line control, such as handoff, which involves switching lines to another base station as the mobile station moves. could not be tested.

For this reason, a wireless pseudo call processing device was created that can test the call processing capabilities of exchanges and wireless line controllers by simulating not only call origination and incoming call response, but also telephone calls and handoffs (NECR
e s, & Dev e lo p,, [90) (1
988-7) Nippon Electric Culture Center p. 99105).

In this conventional example, as shown by reference numeral 4 in FIG. 2, voice line pseudo device 41 and control line pseudo device 42,
Also, the voice line pseudo device 41. Control line pseudo device 4
The mobile station pseudo device 43 is connected to the mobile station pseudo device 2.

The voice line simulator 41 and the control line simulator 42 are parts that simulate the wireless equipment of a base station, interface with the wireless line controller 2 via baseband, and transmit audio signals and line control signals from the wireless line controller 2. The mobile station pseudo device 43 checks whether it is normal or not and reports the result to the mobile station pseudo device 43.

The mobile station pseudo device 43 is a main part of the wireless pseudo call processing device 4, and sets test conditions input from a personal computer (not shown), generates pseudo calls, and moves up to 128 stations. By simulating the call processing function of the station and by simulating carrier wave level fluctuations in the radio line, the radio line control device 2 and the exchange 3 perform call connection and call termination.

It tests call control functions such as handoff and communication path continuity tests without using radio waves, analyzes test results, and outputs the results to a personal computer. All of these operations performed by the mobile station pseudo device 43 are executed by software.

[Problem to be solved by the invention]

The conventional wireless pseudo call processing device described above transfers most of the call control for outgoing and incoming calls, simulated line settings, simulated wireless lines, and connection confirmation performed by the base station's wireless device and each mobile station. This is done using the software of the station simulator, and it is necessary to incorporate from the beginning a function that can deal with the number of mobile stations according to the maximum traffic conditions to be simulated, which has the disadvantage of increasing the scale of the equipment. Since it is configured to be connected to the wireless line control device using the same number of connection cables as the total number of lines and control lines, there is a drawback that the connection becomes complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wireless pseudo call processing device that can be miniaturized as a whole and can simplify connection to a wireless channel control device.

[Means to solve the problem]

The wireless pseudo call processing device of the present invention is an A/D device having an analog side connected to each of the two-way voice lines and each of the two-way control lines that connect the wireless line control device of the car telephone system to the base station wireless device. - a D/A converter, a first time division multiplexing/demultiplexing circuit whose separation side is connected to the digital side of these A/D/D/A converters, and multiplexing of this first time division multiplexing/demultiplexing circuit; a time division switching device having one input/output end connected to one side thereof, a second time division multiplexing/demultiplexing circuit having a multiplexing side connected to the other input/output end of this time division switching device; At least one pseudo mobile station device connected to the separation side of the multiplexing/separation circuit, an input/output device connection device that inputs and outputs information between external devices, and information input from this input/output device connection device. and a control device that controls the pseudo mobile station device based on information input from the pseudo mobile station device and controls the time division switching device based on information input from the pseudo mobile station device.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

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

In FIG. 1, reference numeral 1 indicates a wireless pseudo call processing device which is an embodiment of the present invention, and 2 and 3 indicate a wireless line control device and a switch whose call processing ability is to be tested.

Each voice line relay device 21 of the radio line control device 2 is connected to the exchange 3 via a bidirectional voice line, and each control line relay device 22 is connected to the exchange 3 via a common bidirectional control line via a control device 23. The wireless pseudo call processing device 1 is
A / D -D / d -D / d -D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D -D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D / D -D / D / D / D / D / D -D / D -D / D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D -D / D / D / D / D -D -D / each is connected to each of the audio line relay devices 2 and each control line relay device 22 of each control line.
A converter 11, a time division multiplexing/demultiplexing circuit 12 in which a demultiplexing side is connected to the digital side of each A/D-D/A converter 11, and one input/output to the multiplexing side of the time division multiplexing/demultiplexing device 12. A time division switching device 13 whose ends are connected, and a time division switching device 13
A time division multiplexing/separation circuit 14 whose multiplexing side is connected to the other input/output end of the time division multiplexing/separation circuit 14, a pseudo mobile station device 15 connected to the separation side of the time division multiplexing/separation circuit 14, an input/output device connection device 16, Split exchange device 13. It is configured to include a pseudo mobile station device 15 and a control device 17 connected to an input/output device connection device 16.

The wireless pseudo call processing device 1 converts the audio signal 1 line control signal that the wireless line control device 2 sends and receives to and from the base station wireless device into an A/D converter.
The signals are digitized by the D/A converter 11, and all of these signals are digitally processed within the own device. These digitized signals are drawn into each pseudo mobile station device 15 via a time division multiplexing/demultiplexing circuit 121, a time division switching device 132, and a time division multiplexing/demultiplexing circuit 14.

In the initial setting of the time division switching device 13, the control device 17
The control line from the radio line control device 2 is caused to be drawn into each pseudo mobile station device 15. When each pseudo mobile station device 15 receives the line allocation information regarding the outgoing/incoming call, it requests the time division switching device 13 via the control device 17 to set up a line for a call.

Calls are made and received by the pseudo mobile station device 1 in the wireless pseudo call processing device 1.
Perform in pairs with 5 comrades. After the communication path is established, a tone or data is emitted from one of the pseudo mobile station devices, looped back by the other party's pseudo mobile station device, and the continuity of the communication path is checked on the sending side.

When switching lines during a call, that is, handoff, first lower the value of the received electric field level information sent to the voice line relay device connected to the pseudo mobile station device to which you want to handoff. It starts with creating. Since the method of selecting the voice line relay device of the destination to be handed off within the radio line control device 2 is determined by the software of the control device 23, the control device 17 of the wireless pseudo call processing device 1 uses the same concept to select the voice line relay device of the destination to be handed off. A line relay device is selected, and the time division switching device 13 is controlled so that the communication path is connected to a vacant third pseudo mobile station device, and the third pseudo mobile station device sends data to the voice line relay device. The value of the received electric field level information is increased, and the wireless line control device 2 waits for handoff to be executed based on a comparison of the received electric field level values. For handoff, the line allocation information of the handoff destination is sent from the voice line relay device to the pseudo mobile station device to which the handoff is to be performed, using a line with a lower received electric field level. , the pseudo mobile station device to be handed off is replaced with a third pseudo mobile station device and connected to the voice line relay device of the handoff destination. The pseudo mobile station device that has been handed off increases the value of the received electric field level information, which had been lowered to prevent handoff again, and issues a tone or data to check the continuity of the communication path and confirm whether the handoff was successful or not. The call termination and disconnection are reported from the pseudo mobile station device 15 to the control device 17.

Upon receiving this report, the control device 17 controls the line setting of the time division switching device 13 so that the control line from the radio line control device 2 is pulled into the pseudo mobile station device 15 and the incoming and outgoing calls are monitored. In this way, the control device 17 controls the time division switching device 13 based on the channel assignment information received by each pseudo mobile station device 15, so that the connection switching operation of the time division switching device 13 can reassign the radio channel. simulate

Further, the control device 17 controls each pseudo mobile station device 15 based on test conditions input from a personal computer (not shown) via the input/output device connection device 16, and each pseudo mobile station device 15 performs this control. Based on this, a pseudo call is generated, and an audio signal one-line control signal is transmitted and received with the time division multiplexing/demultiplexing circuit 14. The voice signal is a tone signal or data signal within the voice band, and is used to confirm the connection of the communication path.

Further, the control device 17 transmits received field strength information of radio waves from the mobile station received by the base station wireless device to the pseudo mobile station device 15.
Handoff test conditions are set by creating a simulated handoff.

Call processing information resulting from various tests is collected in the control device 17 and output to the personal computer via the input/output device connection device 16. A personal computer is
It performs statistical processing of the call processing information, etc., and also performs maintenance and management of each device within the wireless pseudo call processing device 1.

The wireless pseudo call processing device 1 causes each pseudo mobile station device 15 to perform call control for the outgoing and incoming calls and to confirm the connection of the communication path, and controls the time division switching device 13 for simulating the setting of a wireless channel and performs wireless communication. The functions are distributed by having the control device 17 control the pseudo mobile station device 15 for simulating a line and setting handoff conditions.

In addition, since each signal is digitized and time-division multiplexed, the A/D-D/A converter 11 and the time-division multiplexing/demultiplexing circuit 12 are separated from other parts to create a wireless line control device, which is the device under test. By arranging the separated part and the other parts by a single connecting cable, the cable wiring between the devices during testing can be greatly simplified.

Since the time division switching device 13 and the time division multiplexing/demultiplexing circuits 12 and 14 with a capacity commensurate with the total number of lines implemented in the radio line control device 2 are easily available in LSI form, these wireless Implementation in the pseudo call processing device 1 is easy. On the other hand, even if only one pseudo mobile station device 15 is installed, a connection test for all lines is possible. Therefore, by adjusting the number of pseudo mobile station devices 15 to be installed according to the traffic conditions desired to be realized in the test, the overall size of the wireless pseudo call processing device 1 can be reduced.

〔Effect of the invention〕

As explained above, the present invention provides a time-division switching device that simulates radio channel settings, so that connections between each relay device in the radio channel control device and each pseudo mobile station device in the device of the present invention can be arbitrarily established. In addition, it is possible to reduce the size of the device by increasing or decreasing the number of pseudo mobile station devices installed according to the traffic conditions that you want to achieve in the test. If the first time division multiplexing/demultiplexing circuit is arranged separately from other parts, it has the effect of greatly simplifying the connection with the radio line control device.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a block diagram showing an example of a conventional wireless pseudo call processing device. 1... Radio pseudo call processing device, 2... Radio line control device, 3... Exchange, 11...
・・A/D-D/A converter, 12.14...
Time division multiplexing/demultiplexing circuit, 13... Time division switching device, 15... Pseudo mobile station device, 16...
- Input/output device connection device, 17...control device. Agent Patent Attorney Susumu Uchihara

Claims (1)

[Claims] A/D/D with an analog side connected to each of the bidirectional voice lines and each of the bidirectional control lines that connect the radio line control device of the car telephone system to the base station radio device.
/A converter, a first time division multiplexing/separation circuit whose separation side is connected to the digital side of these A/D/D/A converters, and a multiplexing side of this first time division multiplexing/separation circuit. A time division switching device having one input/output terminal connected to it, a second time division multiplexing/demultiplexing circuit having a multiplex side connected to the other input/output terminal of this time division switching device, and a second time division multiplexing/demultiplexing circuit having a multiplexing side connected to the other input/output terminal of the time division switching device. At least one pseudo mobile station device connected to the separation side of the separation circuit, an input/output device connection device that inputs and outputs information between external devices, and the A wireless pseudo call processing device comprising: a control device that controls a pseudo mobile station device and controls the time division switching device based on information input from the pseudo mobile station device.