JP2000165391A - Radio access system supervisory and control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost by simplifying a structure by transmitting the supervisory and control information of radio equipment with the section overhead(SOH) of an SDH system in a radio block and transmitting the information while converting it to an ATM system on the other route. SOLUTION: Remote nodes RN10-1 to 10-n most in the system insert/separate the supervisory and control information of radio equipment to the SDH system SOH through the radio equipment itself because of wireless transmission and this processing at the ATM exchanges of RB 10-1 to 10-n is unnecessitated. Since the interval between a base node BN 20 and a center node CN 30 is made into optical fiber transmission of a general public line, on the other hand, the CN 30 disables the control signal processing of radio equipment because of the installation of ATM exchange only. Then, the ATM exchange of the BN 20 inserts/separates the radio equipment supervisory and control information of transmission to any ATM cell through the SOH of the SDH system and the information is transmitted between the BN 20 and the CN 30 by the ATM system of optical fiber transmission. Therefore, the transmission can be dealt with by the standard ATM exchange.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio access system for transmitting information in a radio section in a frame structure of the SDH system using a radio device on a transmission line and interfacing the information with a subscriber through an ATM exchange. Regarding the control method, the monitoring control information of the wireless device is described in detail.
The present invention relates to a radio access system monitoring system in which transmission is performed using a section overhead of the system, and other routes are converted to the ATM system for transmission.

[0002]

2. Description of the Related Art FIG. 9 is a block diagram showing an example of a conventional wireless network system which employs this kind of wireless access system monitoring and control system.

In FIG. 9, a wireless network system includes a plurality of remote nodes (RNs) 10-1 to 10-1.
0-n and one base node (BN) 20 are connected in a ring via a wireless radio line, and a center node (CN) 30 is connected to the base node 20.

Here, each of the remote nodes 10-1 to 10-10
-N indicates two radios (R) 11, 12 and S, as shown in detail for the remote node 10-1.
The wireless section between each of the remote nodes 10-1 to 10-n and the base node 20 is configured with an SDH (Synchronous Digit).
al Hierarchy), information is transmitted in a frame (SDH frame), and each remote node 10
The monitoring control information of each of the wireless devices 11 and 12 of -1 to 10-n is transmitted using the section overhead (SOH) of the frame of the SDH system.

[0005] In such a configuration, the process of putting the monitoring control information of each radio 11 and 12 on the section overhead of the SDH frame and extracting the monitoring control information of each radio 11 and 12 from the section overhead of this SDH frame is performed. This is performed by the SDH terminal devices 13 of the remote nodes 10-1 to 10-n.

FIG. 10 is a block diagram showing a detailed configuration of the remote node shown in FIG.

Although FIG. 10 shows a detailed configuration of the wireless device 12, the wireless device 11 has the same configuration.

[0008] In FIG. 10, the radio unit 12 comprises an outdoor unit (ODU) 110 and an indoor unit (IDU) 120 connected to an antenna 130. The indoor unit 120 has a main signal processing unit 121 and a monitoring control unit. The main signal processing unit 121 is connected to the outdoor unit 110 and the SDH terminal device 13, and the monitoring control unit 122 is connected to the main signal processing unit 121.
Is connected to a maintenance terminal 140.

Here, insertion / separation of the supervisory control signal of the radio unit 12 from / to the section overhead of the SDH frame transmitted in the radio section is performed by the SDH terminal device 13 through the supervisory control unit 122.

[0010]

However, in the above-mentioned conventional wireless network system, as described above, each of the remote nodes 10-1 to 10-n is provided with the SDH terminal device 13, and this wireless network system Is connected to an ATM system, this S
FIG. 11 solves the problem of the wireless network system shown in FIGS. 9 and 10 in that an ATM switch is required in addition to the DH terminal station device 13 and thus the configuration is complicated and the cost is high. FIG. 10 is a block diagram showing another detailed configuration of a remote node of a conventional wireless network system proposed for the above.

In the configuration shown in FIG. 11, an ATM exchange is connected to the main signal processing unit 121 and the monitoring control unit 122 of the indoor unit 120 of the radio unit 12 instead of the SDH terminal unit 13 shown in FIG. I have.

In the configuration shown in FIG.
Radio 12 for section overhead of frame
The insertion / separation of the supervisory control signal is performed by the ATM switch 14 through the supervisory control unit 122.

However, in the configuration of FIG.
The function of terminating the section overhead in the repeater section, which is not essentially required as a TM exchange, needs to be installed in the ATM exchange 14 for monitoring the radio equipment 12, which complicates the structure of the ATM exchange 14. Another problem is that the cost is high.

Moreover, the function of terminating the section overhead in the repeater section is provided for all remote nodes 1
0-1 to 10-n and the base node 20 need to be installed in the ATM exchanges, respectively.

As another method, an ATM switch 14
Has proposed a method of inserting / separating a supervisory control signal of the wireless device 12 into or from any of the ATM cells of the ATM system.

According to this configuration, the section overhead for the repeater section in the SDH frame is added to the ATM switch 14.
It is no longer necessary to terminate inside, but instead, it is necessary to provide a function to insert / separate the monitoring control information of the radio 12 into / from any ATM cell of the ATM system inside all the ATM exchanges 14.

In addition, an ATM switch having a complicated structure and a high cost due to the above-mentioned functions is used for all remote nodes 10.
-1 to 10-n and the base node 20, causing a problem that the cost of the entire system increases.

Further, all the remote nodes 10-1
Although the section overhead of the SDH frame is vacant in the base nodes 20 to 10-n and the base node 20, it is necessary to perform processing for inserting / separating the monitoring information of the wireless device into / from the ATM cell, so that the line use efficiency is increased. The problem has arisen that is reduced.

It is an object of the present invention to provide a radio access system monitoring and control system which has a simple structure and can reduce the cost.

[0020]

In order to achieve the above object, according to the present invention, information is transmitted in a wireless section in a SDH frame configuration using a wireless device on a transmission line, and the information is transmitted. In a wireless access system monitoring and control system that interfaces with a subscriber through an ATM exchange, monitoring and control information of a wireless device is transmitted using a section overhead of the SDH system in a wireless section, and other routes are A
It is characterized in that it is converted to the TM system and transmitted.

According to a second aspect of the present invention, in the first aspect of the present invention, a dedicated ATM cell is provided when the supervisory control information of the wireless device carried on the section overhead of the SDH system is converted into the ATM system. And the dedicated AT
It is characterized in that the monitoring control information of the wireless device is carried in the M cell, and the monitoring control information of the wireless device is transmitted in a cell different from the main signal cell for user and the ATM cell for ATM system monitoring regulation control.

According to a third aspect of the present invention, in the first aspect of the present invention, when the supervisory control information of the wireless device carried on the section overhead of the SDH system is converted into the ATM system, the supervisory control of the wireless device is performed. The information is carried in the ATM supervisory control cell, and is transmitted in a cell different from the main signal cell for the user.

According to a fourth aspect of the present invention, in the first aspect of the present invention, when converting the supervisory control information of the wireless device carried on the section overhead of the SDH system into the ATM system, the supervisory control of the wireless device is performed. The information is transmitted by being carried in the same ATM cell as the cell for transmitting the main signal for the ATM system user and the signal for controlling the ATM system monitoring regulation.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a radio access system monitoring and control system according to the present invention.

FIG. 1 is a block diagram showing one embodiment of a wireless network system configured by adopting a wireless access system monitoring and control system according to the present invention.

In FIG. 1, parts having the same functions as those of the conventional wireless network system shown in FIG. 9 are denoted by the same reference numerals as those used in FIG. 9 for convenience of explanation.

In FIG. 1, the wireless network system includes a plurality of remote nodes (RNs) 10-1 to 10-1.
0-n and one base node (BN) 20 are connected in a ring via a wireless radio line. A center node (CN) 30 is connected to the base node 20 via an optical fiber 40.

Here, each of the remote nodes 10-1 to 10-1
-N indicates two radios (R) 11, 12 and A, as shown in detail for the remote node 10-1.
It comprises a TM exchange 14.

In the configuration shown in FIG. 1, each of the remote nodes 10-1 to 10-n has an interface with the user, and each of the remote nodes 10-1 to 10-n
Information is wirelessly transmitted in a wireless section between 0-n and the base node 20, and information is transmitted between the base node 20 and the center node 30 via the optical fiber 40.

Now, in the configuration shown in FIG. 1, each of the remote nodes 10-1 to 10-n and the base node 20
The monitoring control information of the wireless devices 11 and 12 indicates that the wireless section is SDH.
The transmission is performed using the section overhead of the system, and the other paths are converted to the ATM system and transmitted.

That is, each of the remote nodes 10-1 to 10-1
The monitoring control information of the ATM switch 14 of the base node 20 and the 0-n is inserted / separated in the ATM cell by the ATM switch 14 itself and transmitted, and a network management device (NMS) installed in the center node 30 Is centrally monitored and controlled.

Each of the remote nodes 10-1 to 10-
n and the supervisory control information of the radios 11 and 12 of the base node 20 are stored in the radios 11 and 12 by the SDH scheme SDH.
It is inserted / separated into the section overhead (SOH) of the frame and transmitted in a wireless section between each of the remote nodes 10-1 to 10-n and the base node 20.

The monitoring and control information of the radio set transmitted to the base node 20 is separated / inserted by the radio set in the base node 20.
Inserted / separated into ATM cells by an ATM switch installed in the inside.

Thereafter, the ATM cell is connected to the optical fiber 4.
0 to the center node 30.

The radio equipment monitoring control information separated / inserted from the ATM by the ATM switching equipment installed in the center node 30 is monitored and controlled by the network management equipment also installed in the center node 30. It is centrally monitored and controlled together with information.

FIG. 2 shows the remote node 10 shown in FIG.
It is the block diagram which showed the detailed configuration of -1 to 10-n.

Although FIG. 2 shows the detailed configuration of the wireless device 12, the wireless device 11 has the same configuration.

In FIG. 2, the remote node 10 (10
The wireless devices 12 of -1 to 10-n) include an outdoor unit (ODU) 110 and an indoor unit (IDU) 120 connected to the antenna 130.

Here, the indoor unit 120 includes a main signal processing unit 121, a monitoring control unit 122, an SOH processing unit 12
3 are provided.

The main signal processing section 121 includes the outdoor unit 1
10 and the ATM switch 14, and also connected to the monitoring control unit 122 and the SOH processing unit 123.

The SOH processing unit 123 and the maintenance terminal 140 are connected to the monitoring control unit 122.

The SOH processing unit 123 includes the SV unit 1
60 and the OW section 150 are connected, and the handset 170 is connected to the OW section 150.

In the above configuration, the monitoring control information inside the wireless device 12 is converted into a monitoring control signal ALM of a predetermined format by the monitoring control unit 122 and transmitted to the SV unit 160.

On the other hand, the SV section 160 executes processing for inserting / separating the monitor control signal ALM into / from the DCC data (D1 to D3). Then, in the SOH processing unit 123,
A process for inserting / separating the DCC data (D1 to D3) into the section overhead (SOH) of the SDH frame is executed.

The monitoring control information of the radio equipment of the other node includes a main signal processing unit 121, an SOH processing unit 123, a DC
The C data (D1 to D3) is transmitted to the SV unit 160 via the reverse route, and can be monitored and controlled by the maintenance terminal 140.

At the same time, the monitoring and control information of the own radio can be monitored and controlled by the maintenance terminal 140.

The order wire signal is output to the OW section 150.
, And is inserted / separated into the E1 byte of the section overhead (SOH). The E1 byte signal is sent to the SOH
Section overhead (SOH) for H-frames
Is inserted / separated into the E1 byte of the SOH. The order wire signal from the other node is transmitted to the OW section 150 via the reverse route.

On the other hand, when a transmission error occurs in the wireless section of the own node, the error information is subjected to a predetermined arithmetic processing in the monitoring control unit 122, and can be monitored by the maintenance terminal 140 as the monitoring control signal ALM. Part 16
At 0, the data is converted into a data format that can be inserted / separated into ERR (B1) bytes.

When a transmission error occurs in the opposite node, the maintenance terminal 140 can monitor the B1 byte error information sent from the opposite node along the route reverse to the above.

Further, SV section 160 inserts / separates transmission error information generated in its own node into DCC data (D1 to D3) and transmits it to another node.

FIG. 3 is a block diagram showing a detailed configuration of base node 20 shown in FIG.

In FIG. 3, the base node 20 includes an antenna 211, a radio 210, an antenna 221, and a radio 2
20, SV and OW section 240, ATM exchange 230,
A maintenance terminal 250 is provided.

Here, the SV and OW section 240
The configuration corresponding to the SV unit 160 and the OW unit 150 shown in FIG.
The W unit 240 is connected to the wireless devices 210 and 220 via lines for transmitting the monitor control signal ALM, E1 byte (OW), B1 byte (ERR), and DCC data (D1 to D3), respectively. .

The ATM switch 230 includes an ATM switch 232, an ATM switch 233, a DCC interface unit 243, and a line switching unit 231. The ATM switch 232 is connected between the wireless device 220 and the line switching unit 231, and is connected to the ATM switch 2.
33 is connected between the wireless device 210 and the line switching unit 231, and the DCC interface unit 234 is connected to the ATM switch 232 and the ATM switch 233, and also connected to the SV and OW unit 240. Are connected to the center node 30 shown in FIG.

Also, the maintenance terminal 250 is
Also, it is connected to a line for transmitting a supervisory control signal ALM between the wireless device 220 and the SV and OW section 240.

In the above configuration, the base node 20
All remote nodes 10-1 to 10-
The monitoring control signals of the n wireless devices are transmitted to the wireless devices 210 and 220 of the base node 20 by the section overhead (SOH) of the SDH frame of the SDH system.

In the radio equipment 210 and the radio equipment 220 of the base node 20, the section overhead (SOH) is separated / inserted from the SDH frame of the SDH system, and the E1 byte (OW) and the B1 byte (ER) are further added.
R), DCC data (D1 to D3) are separated / inserted,
The SV and OW section 240 converts these signals into a predetermined data format, and
3 is transmitted.

The DCC interface unit 234 transmits the OW signal and the DCC signal from all the nodes in a predetermined format to the ATM switch 232 and the ATM switch 233. The ATM switch 232 and the ATM switch 233 monitor these radios. The control signal is converted into an ATM cell together with other ATM signals.

FIG. 4 is a block diagram showing a detailed configuration of center node 30 shown in FIG.

In FIG. 4, the center node 30
M exchange 300, network monitoring device (NMS device)
310 and an OW section 320.

Here, the ATM switch 300 includes a line switching unit 301, a DCC interface 302, an ATM switch 303, an ATM switch 304, and an ATM switch 30.
The line switching unit 301 is connected to the base node 20 shown in FIG. 1 and connected to the ATM switch 303 and the ATM switch 304,
The DCC interface 302 is connected to a network monitoring device (NMS device) 310 and an OW unit 320, and has an ATM switch 303 and an ATM switch 3
04 and the ATM switch 305.

In the above configuration, the monitoring signal of the radio transmitted from the base node 20 by the ATM cell is transmitted to the ATM switch 303 and A by the line switching unit 301.
The data is input to the TM switch 304, where it is separated / inserted as a predetermined data format. Then, the signal is separated into a supervisory control signal and an OW signal of the wireless device by the DCC interface 302 and transmitted to the NMS device 310 and the OW section 320.

The NMS device 310 monitors and controls a radio control signal transmitted from the DCC interface 302, and the OW section 320 performs a call based on the OW signal transmitted from the DCC interface 302.

A signal transmitted from NMS device 310 and OW section 320 of center node 30 to another node is transmitted along the reverse route.

FIG. 5 is a diagram showing the configuration of the STM-1 section overhead employed in the wireless network system shown in FIG. 1, and FIG. 6 is a diagram showing the radio equipment employed in the wireless network system shown in FIG. Monitor control signal A
FIG. 3 is a diagram illustrating an example of a conversion method for converting into a TM cell.

In the conversion system shown in FIG. 6, an ATM cell for transmitting a supervisory control signal of a radio is transmitted to another ATM cell.
An ATM cell for transmitting a supervisory control signal of a radio device is inserted as appropriate between other ATM cells and transmitted independently of the cell.

That is, in FIG. 6, an ATM cell (for a user interface main signal) is an ATM cell for transmitting a user interface main signal.
Consists of bytes.

An ATM cell (for an ATM system supervisory control signal) is an ATM cell for transmitting a supervisory control signal of a user interface or an ATM switch itself.
A cell is also generally composed of 53 bytes.

ATM cell (for monitoring and controlling radio equipment)
Is an AT provided for transmitting a supervisory control signal of a wireless device.
This is an M cell, and this ATM cell is also generally composed of 53 bytes.

FIG. 7 is a diagram showing another example of a conversion system for converting a radio monitoring control signal employed in the radio network system shown in FIG. 1 into an ATM cell.

In the conversion method shown in FIG. 7, the monitoring control signal of the radio is transmitted to the AT which transmits the monitoring control signal of the ATM system.
It is transmitted in the M cell.

That is, in FIG. 7, an ATM cell (for a user interface main signal) is an ATM cell for transmitting a user interface main signal.
Consists of bytes.

An ATM cell (for monitoring and controlling signals of an ATM system and a radio) is an ATM cell for transmitting a monitoring control signal of a user interface, an ATM exchange itself, and a monitoring and controlling signal of a radio. A cell is also generally composed of 53 bytes.

FIG. 8 is a diagram showing still another example of a conversion method for converting a radio monitoring control signal into an ATM cell employed in the radio network system shown in FIG.

In the conversion method shown in FIG.
A user interface signal, a supervisory control signal of an ATM system, and a supervisory control signal of a wireless device are multiplexed and transmitted in a TM cell. The wireless device monitoring control signal shown in FIGS.
The process of converting to a TM cell is performed by the base node 2 shown in FIG.
It is performed within 0.

As described above, in this wireless network system, the wireless device monitoring control signal is transmitted in the section overhead (S
OH), and between the base node (BN) 20 and the center node (CN) 30 the ATM ATM
Transmission is performed using cells. By this, A of all nodes
There is no need to terminate the SOH for the repeater section in the TM exchange and insert / separate the transmission information.

That is, since the most remote nodes (RN) 10-1 to 10-n in the system perform wireless transmission, the monitoring control information of the wireless device is transmitted to the wireless device itself.
By performing insertion / separation to the SOH of the DH system, the ATM switches of the remote nodes (RN) 10-1 to 10-n do not need to perform this processing.

On the other hand, since the base node (BN) 20 and the center node (CN) 30 are not based on wireless transmission but are based on optical fiber transmission which is a general public line, no radio equipment is used, so the center node (CN) 30 is not used. Since only the ATM switch is installed in the unit 30, the control signal of the radio cannot be processed.

Therefore, the AT of the base node (BN) 20
The supervisory control information of the radio, which has been transmitted by the M exchange in the SOH of the SDH system, is inserted / separated into any ATM cell of the ATM system. By doing so, the monitoring signal of the wireless device can be transmitted between the base node (BN) 20 and the center node (CN) 30 by the ATM system using the optical fiber transmission system.

Further, the base station (BN) 20 transfers the monitoring control information of the radio set transmitted by the SOH to the ATM cell. In this case, however, since the conversion is to the ATM cell, a standard ATM exchange is used. Is possible.

As described above, in this wireless network system, the wireless section transmits the supervisory control information of the wireless device to the SD.
Since the transmission is carried on the section overhead (SOH) of the H system, the payload of the SDH system can be used efficiently, and a standard ATM switch that does not need to terminate the SOH of all nodes can be used. Abundant monitoring and control information on wireless devices can be efficiently transmitted at low cost, and a system with good maintainability can be realized at low cost.

[0082]

As described above, according to the present invention,
Since the supervisory control information of the wireless device is transmitted using the section overhead of the SDH system in the wireless section and the other routes are converted into the ATM system and transmitted,
DH system payload can be used efficiently, and AT
Since a standard M switch that does not need to terminate the SOH of all nodes can be used, abundant monitoring and control information about the radio equipment of each node can be transmitted efficiently and at low cost, and maintainability is good. There is an effect that the system can be realized at low cost.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a wireless network system configured by adopting a wireless access system monitoring and control method according to the present invention.

FIG. 2 is a block diagram showing a detailed configuration of a remote node shown in FIG.

FIG. 3 is a block diagram illustrating a detailed configuration of a base node illustrated in FIG. 1;

FIG. 4 is a block diagram showing a detailed configuration of a center node shown in FIG.

FIG. 5 is a diagram showing a configuration of an STM-1 section overhead employed in the wireless network system shown in FIG.

FIG. 6 is a diagram showing an example of a conversion system for converting a radio monitoring control signal employed in the radio network system shown in FIG. 1 into an ATM cell.

FIG. 7 is a diagram showing another example of a conversion method for converting a radio monitoring control signal into an ATM cell employed in the radio network system shown in FIG. 1;

FIG. 8 is a diagram showing still another example of a conversion system for converting a radio monitoring control signal employed in the radio network system shown in FIG. 1 into an ATM cell.

FIG. 9 is a block diagram showing an example of a conventional wireless network system configured by adopting this kind of wireless access system monitoring control method.

FIG. 10 is a block diagram illustrating a detailed configuration of a remote node illustrated in FIG. 9;

FIG. 11 is a block diagram showing another detailed configuration of a remote node of the conventional wireless network system proposed to solve the problem of the wireless network system shown in FIGS. 9 and 10;

[Explanation of symbols]

 10-1 to 10-n Remote Node (RN) 20 Base Node (BN) 30 Center Node (CN) 40 Optical Fiber 11, 12 Radio (R) 13 SDH Terminal Equipment 14 ATM Switch 110 Outdoor Unit (ODU) 120 Indoor unit (IDU) 121 Main signal processing unit 122 Monitoring control unit 123 SOH processing unit 130 Antenna 140 Maintenance terminal 150 OW unit 160 SV unit 170 Handset 210 Radio unit 211 Antenna 220 Radio unit 221 Antenna 230 ATM switch 231 Line switching Unit 232 ATM switch 233 ATM switch 234 DCC interface unit 240 SV and OW unit 250 Maintenance terminal 300 ATM switch 301 Line switching unit 302 DCC interface 303 ATM switch 304 ATM switch Pitch 305 ATM switch 310 the network monitoring apparatus (NMS device) 320 OW portion

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04Q 3/00 H04L 11/00 310B 9A001 330 F term (reference) 5K028 BB04 KK35 MM05 MM14 PP00 5K030 HA10 HB11 HB29 JL01 JL10 MA05 5K031 BA03 DA20 DB01 DB03 EA00 5K033 BA08 CC01 DA14 DA17 EA00 5K042 AA03 AA08 BA11 CA02 CA10 CA13 CA17 EA01 EA15 GA11 JA08 LA13 LA15 9A001 BB04 CC03 CC05 CC07 DD10

Claims (4)

[Claims] 1. A wireless access system monitoring and control system for transmitting information in a wireless section in an SDH frame configuration using a wireless device as a transmission path and interfacing the information with a subscriber through an ATM exchange. The wireless access system monitoring system according to claim 1, wherein the monitoring control information is transmitted using the section overhead of the SDH system in the wireless section, and the other routes are converted into the ATM system and transmitted. 2. When the supervisory control information of the wireless device carried on the section overhead of the SDH system is converted into the ATM system, a dedicated ATM cell is provided, and the supervisory control information of the wireless device is stored in the dedicated ATM cell. 2. The radio access system monitoring system according to claim 1, wherein the monitoring and control information of the wireless device is transmitted in a cell different from the main signal cell for the user and the ATM cell for monitoring and controlling ATM system. 3. When the supervisory control information of the wireless device carried in the section overhead of the SDH system is converted into the ATM system, the supervisory control information of the wireless device is carried in an ATM supervisory control cell, and a user main signal is transmitted. The radio access system monitoring system according to claim 1, wherein the transmission is performed in a cell different from the cell. 4. When converting the supervisory control information of the wireless device carried on the section overhead of the SDH system into the ATM system, the supervisory control information of the wireless device is converted into a main signal for an ATM system user and a signal for an ATM system supervisory control. 2. The radio access system monitoring method according to claim 1, wherein the transmission is carried by being carried on the same ATM cell as the cell transmitting the data.