JPH11313065A - Eoc loop back test method and radio isdn system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the test time of an EOC loop back test. SOLUTION: A telephone exchange station 1 is connected with a radio base station 3 and a terminal base station 9 is connected with an ISDN terminal 10 by a wire circuit. The radio base station 3 is connected to the terminal base station 9 by a radio line. The same message is continuously transmitted three times through the wire circuit. When the radio base station 3 receives three EOC messages (1), (2) and (3), it transmits the EOC message once (step 303). When the terminal base station 9 receives the three echo messages (1), (2) and (3), it transmits the echo message once (step 310). Through the wire circuit, the message is transmitted only once and an EOC loop back test is started by a loop back data signal 311.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ISDN (Int)
egraded Services Digital N
wireless: an integrated services digital communication network) wireless ISD in which a circuit is configured via a digital mobile communication system
EOC for N-line, especially for wireless ISDN line
(Embedded Operation Channel)
el) Related to a loopback test method.

[0002]

2. Description of the Related Art FIG. 2 shows the configuration of a wireless ISDN system in which an ISDN line is configured via a digital mobile communication system.

This wireless ISDN system comprises a telephone exchange 1, a wireless base station 3, a terminal base station 9, and an ISDN terminal 10.

The telephone exchange 1 and the radio base station 3 are connected by wire communication, and the radio base station 3 and the terminal base station 9 are connected by a radio line. The terminal base station 9 and the ISDN
The terminal 10 is connected by wire communication.

[0005] In this wireless ISDN system,
ISDN line communication including wireless communication is performed between the telephone exchange 1 and the ISDN terminal 10.

The radio base station 3 comprises an ISDN line termination device 2, a radio interface device 4, a control processor 6, and an antenna 5.

[0007] The ISDN line termination device 2 is a telephone exchange 1
And ISDN line communication.

The radio interface device 4 includes an antenna 5,
Wireless communication is performed with the wireless interface device 8 of the terminal base station 9 via the antenna 12.

The control processor 6 controls the operation of the radio interface 4 and the operation of the ISDN line termination device 2.

The terminal base station 9 comprises an ISDN line termination device 11, a radio interface device 8, a control processor 7, and an antenna 12.

The ISDN line termination device 11 performs ISDN line communication with the ISDN terminal 10.

The radio interface device 8 is connected to the antenna 1
2. Wireless communication is performed with the wireless interface device 4 of the terminal base station 3 via the antenna 5.

The control processor 7 controls the operation of the radio interface 8 and the operation of the ISDN line termination device 11.

[0014] In such a wireless ISDN system, since wireless communication is included in the middle, there is a high possibility that some trouble will occur as compared with a normal ISDN line.
Therefore, a loopback test using an EOC message (hereinafter referred to as an EOC loopback test) is performed as a maintenance control test for confirming whether the wireless ISDN line is functioning properly.
I), standardized by the European Telecommunications Standards Institute (ESTI).

Next, a conventional EOC loopback test method will be described with reference to the sequence diagram of FIG.

First, the telephone exchange 1 transmits an EOC message (1) to the radio base station 3 (step 20).
0). Upon receiving the EOC message (1), the radio base station 3 sends the EOC message to the terminal base station 9 via a radio line.
The message (1) is transmitted (Step 201). Then, the terminal base station 9 that has received the EOC message (1) transmits the EOC message (1) to the ISDN terminal 10 (Step 202).

ISD receiving EOC message (1)
The N terminal 10 transmits an echo (echo) message (1) to the terminal base station 9 as a response to the EOC message (1) (step 203). The terminal base station that has received the echo message (1) transmits the echo message (1) to the wireless base station 3 via the wireless line (step 204). The radio base station 3 receiving the echo message (1) transmits the echo message (1) to the telephone exchange 1
(Step 205).

Thus, the telephone exchange 1 confirms the connection state of the ISDN line by receiving the echo message (1) which is a reply to the transmitted EOC message (1).

Then, the telephone exchange 1 sends the same EOC message (2) as the EOC message (1) via the radio base station 3 and the terminal base station 9 in the same manner.
Is transmitted to the terminal 10 (steps 206 to 208),
The connection state of the ISDN line is confirmed by receiving the echo message (2) which is a reply to the EOC message (2) (steps 209 to 211).

Further, the telephone exchange 1 sends the same EOC message (3) as the EOC messages (1) and (2) via the radio base station 3 and the terminal base station 9 in the same manner.
Transmit to the SDN terminal 10 (steps 212 to 21)
4) The connection state of the ISDN line is confirmed by receiving the echo message (3) which is a reply to the EOC message (3) (steps 215 to 217).

As described above, the telephone exchange 1 has the same EO
By transmitting the C message three times and receiving the same echo message three times in response to each EOC message, it is recognized that the ISDN line is securely connected. Thus, the telephone exchange 1 and the ISDN
EOC message recognition with the terminal 10 is performed.

The reason why the sequence of repeating transmission / reception of the EOC message and the echo message is performed three times is to ensure that the ISDN line is securely connected, and is defined by the standard.

Only after the EOC message is recognized, the telephone exchange 1 transmits the loopback data signal 218 which is the original purpose, and the EOC loopback test is started.

However, in the conventional EOC loopback test method, since the same sequence is simply repeated three times, the time required for recognizing the EOC message becomes longer. For this reason, the test time of the EOC loopback test becomes longer as a whole.

[0025]

The above-mentioned conventional EOC
In the loopback test method, it takes time to recognize the EOC message between the telephone exchange and the ISDN terminal when starting the loopback test, so that the test time of the EOC loopback test becomes longer. There was a point.

An object of the present invention is to provide an EOC loopback test method that can reduce the test time of the EOC loopback test.

[0027]

To achieve the above object, an EOC loopback test method according to the present invention comprises a telephone exchange, a radio base station connected to the telephone exchange by wire communication, and a radio base station. A terminal base station connected to the base station by a radio line, and an IS connected to the terminal base station by wire communication.
An EOC loopback test method for confirming a function of a wireless ISDN line configured with a DN terminal, wherein the telephone exchange is a message for confirming a connection state of the wireless ISDN line. When the same EOC message is transmitted three times in succession and the radio base station confirms that the three EOC messages transmitted from the telephone exchange are the same, the radio base station sends the EOC message to the terminal base station. And transmits to the telephone exchange that the EOC message has been transmitted to the radio line, and the telephone exchange transmits the EOC message from the radio base station to the telephone exchange. When the transmission to the radio line is transmitted, a loopback data signal for performing a loopback test is transmitted to the radio base station. The radio base station receives and holds the loopback data signal from the telephone exchange, and the terminal base station receives the EOC message transmitted from the radio base station, and receives the EOC message. Is transmitted to the ISDN terminal three times in succession. When the ISDN terminal receives the three EOC messages transmitted from the terminal base station, the ISDN terminal transmits the same echo message, which is a reply to the EOC message, to the terminal. The terminal transmits three consecutive times to the base station,
Upon confirming that the three echo messages transmitted from the ISDN terminal are the same, the echo message is transmitted once to the wireless base station via a wireless line, and the wireless base station transmits the echo message to the terminal base station. Upon receiving the echo message transmitted from the station, the control unit transmits the held loop-back data signal to the terminal base station and transmits the echo message to the telephone exchange three times in succession. .

According to the present invention, the radio base station collects three EOC messages into one EOC message and transmits the EOC message to the radio line, and the terminal base station collects three echo messages into one and transmits the same to the radio line. It was done.

Therefore, the EOC message and the echo message in the radio link between the radio base station and the terminal base station are transmitted only once, respectively, and the telephone exchange and the IS
Since the EOC message recognition with the DN terminal is performed, the test time of the EOC loopback test can be reduced.

In another EOC loopback test method according to the present invention, one EOC loopback test method is provided between the radio base station and the terminal base station.
A plurality of the ISDN lines are set to one wireless line by a wireless compression technique.

In another EOC loopback test method of the present invention, the wireless compression method is a time division multiplex method.

In another EOC loopback test method of the present invention, the wireless compression method is a code division multiplex method.

According to the present invention, even when there are a plurality of ISDN lines for which an EOC loopback test is performed simultaneously, it is possible to avoid a congestion state by reducing the number of message communications on the radio communication line. The test time of the loopback test can be reduced.

[0034]

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

(First Embodiment) FIG. 1 is a diagram showing a sequence of an EOC loopback test method according to a first embodiment of the present invention.

The configuration of the wireless ISDN system for performing the EOC loopback test method of the present embodiment is the same as the configuration shown in FIG. 2 except for the control sequence relating to the EOC loopback test method.

Next, the operation of the EOC loopback test method of this embodiment will be described with reference to the sequence diagram of FIG.

First, the telephone exchange 1 continuously sends the same EOC messages (1), (2), and (3) three times to the radio base station 3 (steps 300 to 301).
When the control processor 6 of the radio base station 3 determines that all three EOC messages continuously transmitted from the telephone exchange 1 and received by the ISDN line terminating device 2 are the same, they are combined into one. An EOC message is sent out on the wireless line via the wireless interface device 4 and the antenna 5 (step 303).

When the control processor 6 confirms that the ISDN line terminating device 2 has transmitted the EOC message to the radio interface device 4, it notifies the telephone exchange 1 of the fact. Then, the telephone exchange 1 transmits a test loopback data signal 311 to the radio base station 3 to prepare for performing an EOC loopback test. Then, the radio base station 3 receiving the loopback data signal 311 holds this signal.

The radio interface device 8 of the terminal base station 9 having received one EOC message from the radio base station 3
Sends the EOC message to the ISDN line terminating device 11
Send to Then, the ISDN line termination device 11 transmits the EOC messages (1), (2), and (3) for three times to the ISDN terminal 10 again (steps 304 to 30).
6).

The ISDN terminal 10 continuously transmits the same echo messages (1), (2) and (3) to the terminal base station 9 as replies to the three EOC messages (steps 307 to 309). ). Then, the control processor 7 in the terminal base station 9 sets the ISDN terminal 1
If it is determined that all three EOC messages continuously transmitted from 0 and received by the ISDN line terminating device 11 are the same, the combined EOC messages are transmitted to the wireless interface device 8 and the antenna 12 via the wireless interface device 8. It is sent out on the line (step 310).

When the radio interface device 4 receives one EOC message from the terminal base station 9, the control processor 6 transmits the held loopback data signal 311 via the radio interface device 4 and the antenna 5. Send. Then, the radio interface device 4 transmits the received EOC message to the ISDN line termination device 2. Then, the ISDN line terminating device 2 transmits the EOC messages (1), (2), and (3) for three times to the telephone exchange 1 again (steps 312 to 314).

The loopback data signal 311 transmitted from the radio base station 3 is transmitted via the terminal base station 9 to the ISDN
The ISDN terminal 10 transmits the loopback data signal 3 via the terminal base station 9 and the radio base station 3 to the terminal 10.
11 is returned to the telephone exchange 1 to perform the EOC loopback test.

In the EOC loopback test method of the present embodiment, the EOC message and the echo message are each transmitted only once in the radio link between the radio base station 3 and the terminal base station 9 and the telephone exchange 1 and the ISDN Terminal 1
Message recognition between 0 is being performed. for that reason,
The EOC loopback test method of this embodiment can reduce the test time as compared with the conventional method shown in the sequence diagram of FIG.

(Second Embodiment) Next, an EOC loopback test method according to a second embodiment of the present invention will be described.

In the first embodiment, the ISDN line for performing the EOC loopback test is described as one line. However, in this embodiment, a wireless compression technique such as time division multiplexing and code division multiplexing is applied to one wireless line. In this example, a plurality of ISDN lines are set.

In this embodiment, even in such a case, each ISD
EOC messages and echo messages for three times per N lines can be allocated on the wireless line as a single message.

The present embodiment is more effective as the number of ISDN lines for which the EOC loopback test is performed at the same time is more effective, and it is possible to avoid a congestion state by reducing the number of message communications on the radio communication line. As a result, the test time of the EOC loopback test can be reduced.

[0049]

As described above, according to the present invention, an EOC message and an echo message in a radio link between a radio base station and a terminal base station are transmitted only once, respectively, so that the telephone exchange and the ISDN terminal can communicate with each other. Since the EOC message recognition is performed during the period, the test time of the EOC loopback test can be shortened.

[Brief description of the drawings]

FIG. 1 is a sequence diagram illustrating an operation of an EOC loopback test method according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a wireless ISDN system.

FIG. 3 is a sequence diagram showing an operation of a conventional EOC loopback test method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone exchange 2 ISDN line termination device 3 Radio base station 4 Radio interface device 5 Antenna 6 Control processor 7 Control processor 8 Radio interface device 9 Terminal base station 10 ISDN terminal 11 ISDN line termination terminal 12 Antenna 200-217 Step 218 Loopback・ Data signal 300 to 310 steps 311 Loopback data signal 312 to 314 steps

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04Q 3/42 104 H04L 11/02 Z 7/34 H04Q 7/04 B

Claims (8)

[Claims] 1. A telephone exchange, a radio base station connected to the telephone exchange by wire communication, a terminal base station connected to the radio base station by a radio line, and a wire communication with the terminal base station. An EOC loopback test method for confirming a function of a wireless ISDN line configured between the ISDN terminal and a connected ISDN terminal, wherein the telephone exchange exchange is configured to confirm a connection state of the wireless ISDN line. The radio base station transmits the same EOC message three times consecutively, and when the radio base station confirms that the three EOC messages transmitted from the telephone exchange are the same, the radio base station transmits the EOC message to the terminal base station. To the central office via a wireless line and to the central office
The telephone exchange notifies that an OC message has been transmitted to the wireless line, and the telephone exchange performs a loopback test when notified that the EOC message has been transmitted to the wireless line from the wireless base station. Transmitting a loopback data signal to the radio base station, the radio base station receives and holds the loopback data signal from the telephone exchange, and the terminal base station, EO transmitted from wireless base station
When receiving the C message, the EOC message is continuously transmitted to the ISDN terminal three times, and the ISDN terminal transmits the EOC message to the ISDN terminal.
When two EOC messages are received, the same echo message, which is a response to the EOC message, is transmitted to the terminal base station three times in succession, and the terminal base station transmits 3 EOC messages transmitted from the ISDN terminal.
Make sure that the two echo messages are identical,
The radio base station transmits the echo message to the radio base station via a radio line once. When the radio base station receives the echo message transmitted from the terminal base station, the radio base station holds the loopback data. An EOC loopback test method for transmitting a signal to the terminal base station and transmitting the echo message to the telephone exchange three times in succession. 2. The EOC loopback test method according to claim 1, wherein a plurality of said ISDN lines are set in one radio line between said radio base station and said terminal base station by a radio compression technique. 3. The EOC loopback test method according to claim 2, wherein said wireless compression method is a time division multiplex method. 4. The EOC loopback test method according to claim 2, wherein said wireless compression method is a code division multiplexing method. 5. A telephone exchange, a radio base station connected to the telephone exchange by wire communication, a terminal base station connected to the radio base station by a radio line, and wire communication with the terminal base station. In a wireless ISDN system configured with connected ISDN terminals, the telephone exchange transmits the same EOC message, which is a message for confirming the connection state of the wireless ISDN line, three times in succession, When confirming that the three EOC messages transmitted from the telephone exchange are the same, the radio base station transmits the EOC message once to the terminal base station via a radio line, E to exchange
The telephone exchange notifies that an OC message has been transmitted to the wireless line, and the telephone exchange performs a loopback test when notified that the EOC message has been transmitted to the wireless line from the wireless base station. Transmitting a loopback data signal to the radio base station, the radio base station receives and holds the loopback data signal from the telephone exchange, and the terminal base station, EO transmitted from wireless base station
When receiving the C message, the EOC message is continuously transmitted to the ISDN terminal three times, and the ISDN terminal transmits the EOC message to the ISDN terminal.
When two EOC messages are received, the same echo message, which is a response to the EOC message, is transmitted to the terminal base station three times in succession, and the terminal base station transmits 3 EOC messages transmitted from the ISDN terminal.
Make sure that the two echo messages are identical,
The radio base station transmits the echo message to the radio base station via a radio line once. When the radio base station receives the echo message transmitted from the terminal base station, the radio base station holds the loopback data. A wireless ISDN system for transmitting a signal to the terminal base station and transmitting the echo message to the telephone exchange three times in succession. 6. The wireless communication system according to claim 5, wherein a plurality of said wireless ISDN lines are set in one wireless line between said wireless base station and said terminal base station by a wireless compression technique.
SDN system. 7. The wireless ISDN system according to claim 6, wherein the wireless compression method is a time division multiplexing method. 8. The wireless ISDN system according to claim 6, wherein said wireless compression method is a code division multiplexing method.