JP5284019B2 - Wireless communication system - Google Patents

Description

  The present invention relates to a wireless communication system, and in particular, in a system in which slave units and HUBs are connected in multiple stages, an erroneous abnormality report is prevented from being output from a lower-level device, the system reliability line is improved, and maintenance is facilitated. The present invention relates to a wireless communication system.

[Description of Prior Art]
In digital mobile communication, a high-power transmission amplifier is used. In the past, the transmission amplifier was often installed on the same rack as the base station. However, in recent years, the transmission / reception amplifier having the function of the radio unit and the transmission amplifier is separated from the base station, and both are connected by an optical fiber. A configuration is also used. Such a configuration is referred to as ROF (Radio On Fiber) or RRH (Remote Radio Head).
By using ROF and RRH, there is an effect that communication quality is improved, operation cost is reduced, and maintenance is facilitated.

[Configuration example of base station and transceiver amplifier]
A configuration example of a base station and transmission / reception amplifiers in ROF and RRH will be described. Examples of configurations of base stations and transmission / reception amplifiers in ROF and RRH include a star topology and a chain topology.
The star type has a configuration in which a plurality of transmission / reception amplifiers (TRX-AMP) are directly connected to a base station via optical fibers.

The base station is equipped with an optical interface (I / F), converts the signal from the base station to the transmission / reception amplifier from an electrical signal to an optical signal, transmits the optical signal through the optical fiber, and receives the light received from the transmission / reception amplifier. Convert signals into electrical signals.
An optical fiber transmits an optical signal and has standards such as CPRI and OBSAI.

The transmission / reception amplifier includes an optical-electric conversion unit that performs mutual conversion between an optical signal and an electrical signal, receives and amplifies transmission data transmitted from the base station via the optical fiber, outputs the data from the antenna, The received data is amplified and transmitted to the base station via the optical fiber.
In the star type, each of the transmission / reception amplifiers as slave stations is connected to the optical interface of the base station.

In the chain type, a transmission / reception amplifier is connected to a base station via an optical fiber, and another transmission / reception amplifier is connected to the transmission / reception amplifier via an optical fiber.
That is, the transmission / reception amplifier is connected by an optical fiber, and the lower transmission / reception amplifier is connected to the base station via the upper transmission / reception amplifier.

The transmission / reception amplifier used in the chain type has two ports, a slave port and a master port. The slave port performs transmission / reception to / from a higher-level base station and transmission / reception amplifier. Transmission / reception to / from a lower transmission / reception amplifier is performed.
The slave port is an input / output port for operating with a connection destination clock, and the master port is an input / output port for operating the connection destination with an output clock.

[Outline of optical transmission system]
In an optical transmission system, a base station, a repeater, and a slave unit (transmission / reception amplifier) are connected by an optical fiber or a coaxial cable, and the signal output from the base station is transmitted to a remote dead zone as it is, for mobile communication. This is a wireless communication system for expanding the service area. Generally, an optical fiber is used between the base station and the repeater.

In an optical transmission system, an optical interface is provided in a base station provided in a dead zone, a repeater is connected to the base station via an optical fiber, and a plurality of slave units are connected to the repeater in a star shape or a chain shape. . The repeater and the slave are connected by a coaxial cable or an optical fiber, and the slave and the slave are connected by an optical fiber.
As described above, the optical transmission system enables mobile communication even in a dead zone where a wireless signal does not reach, such as in a building, and can expand the service area of the mobile wireless system.

[Example of chain type system: Fig. 5]
There is also a wireless communication system having a chain configuration in which a plurality of slave units or hubs (HUBs) are connected to a relay unit (base unit) connected to a base station in multiple stages. Such a configuration can increase the degree of freedom of the system configuration and can be configured according to the installation location.

A wireless communication system having a chain configuration will be described with reference to FIG. 5 using an optical transmission system as an example. FIG. 5 is a schematic explanatory diagram illustrating a configuration example of a wireless communication system including a handset that can be connected in a chain type and a HUB.
As shown in FIG. 5, a wireless communication system including a chain-connectable slave unit and HUB includes a base station (BTS) 1, a relay unit 2, slave units 4a to 4f, and HUBs 5a and 5b. The repeater 2 and the slave unit 4, the slave units 4, the slave unit 4 and the HUB 5 are connected by an optical fiber 3. Further, a monitoring console 7 is connected to the relay device 2 for monitoring the operation status of the system by an operator's operation.

  The base station 1 is a base station of a mobile radio system, and transmits and receives high frequency signals. Here, it is connected to the repeater 2 by a coaxial cable. Further, when the base station 1 is provided with an optical interface, the base station 1 and the repeater 2 may be connected via an optical fiber.

  The repeater 2 is installed at a location far away from the base station 1, converts a signal received from the base station 1 into an optical signal, and distributes and outputs the optical signal to the slave unit 4 and the HUB 5 via the optical fiber 3. Further, the repeater 2 converts the optical signal received from the slave unit 4 or the HUB 5 through the optical fiber 3 into electric communication, multiplexes it, and transmits it to the base station 1.

  In the example of FIG. 5, the repeater 2 includes a plurality of ports (master ports) 22 a to 22 e to which the optical fiber 3 is connected, and a plurality of slave units 4 and HUBs 5 can be connected. Here, the slave units 4 a and 4 b and the HUB 5 are connected to the master port 22 of the relay unit 2.

The subunit | mobile_unit 4 converts the optical signal received from the repeater 2 into an electric signal (high frequency signal), amplifies the high frequency signal, and outputs it as a radio signal via an antenna, and the radio signal transmitted from the mobile terminal Is a transmission / reception amplifier (TRX-AMP) that receives and amplifies the signal, converts it into an optical signal, and outputs it to the repeater 2.
The slave unit 4 is provided with a slave port 41 and a master port 42. The slave unit 41 is connected to a host device (any one of the repeater 2, HUB 5, and slave unit 4). 4 or HUB 5 is connected through a master port 42.

The HUB 5 is provided with one slave port 51 and a plurality of master ports 52, so that a plurality of lower-level devices can be connected.
In the example of FIG. 5, the slave unit 4c is connected to the master port 52a of the HUB 5a, and the slave unit 4d is further connected to the master port 42 of the slave unit 4c.

[Monitoring of line quality: Fig. 5]
Further, the relay unit 2, the slave unit 4, and the HUB 5 are provided with a function for monitoring the quality of the received signal received at each port.
Although illustration is omitted, the repeater 2 includes a line quality monitoring unit that monitors the line quality for each of the plurality of master ports, and the slave unit 4 and the HUB 5 have the quality of the signal received from the host device received at the slave port. And a line quality monitoring unit for monitoring the quality of the signal from the lower-level device received at the master port.
The HUB 5 is provided with a plurality of master ports similarly to the repeater 2, and the line quality monitoring unit corresponding to each master port monitors the quality of the received signal.
In the repeater 2, the slave unit 4, and the HUB 5, when any of the line quality monitoring units detects an abnormality, the control unit reports an abnormality to the upper monitoring console 7.

[Unused port: Fig. 5]
Further, in order to achieve a system configuration with a high degree of freedom, the relay unit 2, the HUB 5, and the slave unit 4 have a plurality of master ports, and become unused ports (empty ports) to which no device is connected depending on the arrangement of the system. There is a case.
In the example of FIG. 5, the master ports 22b and 22d of the repeater 2, the master port 52c of the HUB 5a, the master ports 42 of the slave units 4b, 4d, 4e, and 4f are unused ports.

[Prior art documents]
In addition, as a prior art regarding a radio | wireless communications system, there exists Unexamined-Japanese-Patent No. 2005-057651 (patent document 1).
In Patent Document 1, a test signal for measuring communication quality is added to a digital radio signal and transmitted, the communication quality is measured with respect to the received signal, and based on the measurement result of the communication quality, a host monitoring device A quality monitoring method for optical digital transmission and a wireless base station apparatus for blocking the optical transmission system are described.

Japanese Patent Application Laid-Open No. 2005-057651

  However, in the conventional wireless communication system, since the line quality monitoring unit monitors the line quality even for unused ports, it is judged that the communication quality is bad even though it is not used, and an abnormality is reported to the host device. The operator of the monitoring console must judge whether the line quality is actually abnormal or an erroneous abnormality report due to an empty port, which is cumbersome. There was a problem that there was a risk of coming.

  The present invention has been made in view of the above circumstances, and it is possible to prevent the line quality monitoring unit of an unused port from reporting an erroneous abnormality report to the upper layer, improve system reliability, and facilitate maintenance. An object of the present invention is to provide a wireless communication system capable of

The present invention for solving the problems of the above-described conventional example includes a repeater that distributes and outputs a signal from a base station to a lower level via a plurality of master ports, and a plurality of master ports that receive a signal from a higher level. A wireless communication system including a hub that distributes and outputs to a lower level via a slave unit that amplifies a signal received from the higher level and outputs the signal from an antenna and outputs to a lower level from a master port. The slave unit monitors the line quality corresponding to the master port in each device, and notifies the abnormality to the higher-level monitoring device when a line quality abnormality is detected by the line quality monitoring unit. A control unit, and a non-volatile memory that stores information indicating on / off of operation for each line quality monitoring unit, and the control unit identifies a master port that is an unused port from the monitoring device; Vs it When the instruction to stop the line quality monitoring unit to be received is received, information indicating “off” of operation for the line quality monitoring unit corresponding to the port number specified in the instruction is stored in the nonvolatile memory, and “off” is set to “off”. In response to the information shown, the operation of the line quality monitoring unit is stopped, and when the power is turned on, the information indicating ON / OFF of the operation for each line quality monitoring unit is read from the nonvolatile memory, and the information indicating “OFF” is displayed. The operation of the stored line quality monitoring unit is stopped.

Further, the present invention provides a repeater that distributes and outputs signals from a base station to a lower level via a plurality of master ports, and a hub that receives signals from an upper level and distributes and outputs the signals to a lower level via a plurality of master ports. A wireless communication system including a slave unit that amplifies a signal received from a higher level and outputs it from an antenna and outputs a lower level from a master port. The relay unit, the hub, and the slave unit are provided in each device. A line quality monitoring unit that monitors the line quality corresponding to the master port, and a control unit that notifies the host monitoring device of the abnormality when a line quality abnormality is detected by the line quality monitoring unit, the base station, a nonvolatile memory for storing information to stop the line quality monitoring unit corresponding to the port number and the port number to identify the master port is unused port of the lower device, the port number and stored in the nonvolatile memory And a control unit for transmitting the multicast to the lower device, and repeater, hub and the control portion of the slave unit is, from the base station, the port number and line quality monitoring the corresponding identifying the master port is unused ports When the information for stopping the unit is received, the operation of the line quality monitoring unit is stopped according to the information.

According to the present invention, in a wireless system, a repeater, a hub, and a slave unit monitor a line quality corresponding to a master port in each device, and a line quality monitoring unit When an abnormality is detected, the control unit is configured to notify the host monitoring device of the abnormality, and for each line quality monitoring unit, a nonvolatile memory that stores information indicating operation on / off is provided. When a port number for identifying a master port that is an unused port and an instruction to stop the corresponding line quality monitoring unit are received from the device, the line quality monitoring unit corresponding to the port number specified by the instruction is stored in the nonvolatile memory. Information indicating “off” of the operation is stored, and the operation of the line quality monitoring unit is stopped according to the information indicating “off”. Since the wireless communication system is configured to read the information indicating on / off of the operation and stop the operation of the line quality monitoring unit in which the information indicating “off” is stored, the master that is unused from the monitoring device If you specify the port number and send an instruction to stop the line quality monitoring unit, you can stop the operation of the line quality monitoring unit corresponding to the unused port of the repeater, hub, or slave unit. Can prevent erroneous detection of line quality errors in the network, prevent false alarm reports from being sent to the monitoring device, improve system reliability, reduce operator load, and facilitate maintenance. There is an effect that can be done.

Further, according to the present invention, in the wireless system, the repeater, the hub, and the slave unit monitor the line quality corresponding to the master port in each apparatus, and the line quality monitor unit sets the line. A control unit for notifying a higher-level monitoring device of an abnormality when a quality abnormality is detected, and the base station specifies a port number for identifying a master port that is an unused port of the lower-level device and a line quality corresponding to the port number A non-volatile memory for storing information for stopping the monitoring unit, and a control unit for transmitting the port number and information stored in the non-volatile memory to a lower-level device, the relay unit, the hub, and the control unit of the slave unit , radio base station, which Ru is stopped when receiving the information to stop the line quality monitoring unit corresponding to the port number and its identifying the master port unused port, the operation of the line quality monitoring unit in accordance with the information Because it is a communication system, if you send information to stop the line quality monitoring unit by specifying the unused master port number from the base station, it corresponds to the unused port of the repeater, hub, and slave unit The operation of the line quality monitoring unit can be stopped, it is possible to prevent erroneous detection of line quality abnormalities at unused ports, and to prevent erroneous monitoring reports from being sent to the monitoring device. There is an effect that the reliability can be improved, the load on the operator can be reduced, and the maintenance can be facilitated.

[Summary of Invention]
Embodiments of the present invention will be described with reference to the drawings.
In the wireless communication system according to the embodiment of the present invention, each device of the slave unit, the HUB, and the repeater includes a line quality monitoring unit that monitors the line quality for each port, and the use / unuse of each port when the system is constructed. Information indicating on / off of the operation of each line quality monitoring unit is stored in the nonvolatile memory according to the use situation, and the control unit of each device reads each line quality from the nonvolatile memory when the device is turned on. The information indicating the on / off of the monitoring unit is read to control the operation / stop of each line quality monitoring unit. The operation of the line quality monitoring unit corresponding to the unused port is turned off, and the line quality is abnormal. Can be prevented from being erroneously detected, erroneous reporting of an abnormality to the host device can be prevented, system reliability can be improved, and maintenance can be facilitated.

  In addition, the wireless communication system according to the present embodiment transmits data indicating the use / unuse of each port to each device of the slave unit, the HUB, and the relay device from the host monitoring console, and controls each device. The control unit of each device stores on / off of the operation for each line quality monitoring unit corresponding to each port in the nonvolatile memory based on the received data. Based on the data stored in the memory, the operation of the line quality monitoring unit in which “OFF” is stored is stopped, and the operation of the line quality monitoring unit of each device is turned on / off by setting from the monitoring console. Off can be controlled, and even when the system configuration is changed, the on / off of the line quality monitoring unit can be easily changed, improving the system reliability and facilitating maintenance. is there.

[Configuration of Wireless Communication System of Embodiment: FIG. 5]
The schematic configuration of the wireless communication system (this system) according to the embodiment of the present invention is the same optical transmission system as the conventional wireless communication system shown in FIG. 1, a repeater 2, slave units 4 a to 4 f, HUBs 5 a to 5 b, and a monitoring table 7. The repeater unit 2 and the slave unit 4, the slave units 4 to each other, and the slave unit 4 and the HUB 5 are optical fibers 3. Connected by. The repeater 2 and the base station 1, and the repeater 2 and the monitoring table 7 are connected by a coaxial cable.

  As in the conventional case, the repeater 2, the slave unit 4, and the HUB 5 are provided with a line quality monitoring unit corresponding to each master port and slave port, monitoring the line quality state for each port, and obtaining the result. The control unit is notified, and when the line quality is not good, the control unit outputs an abnormality report to the monitoring console 7.

  The monitoring console 7 is operated by an operator, receives a report of the operating state from each device (relay unit 2, slave unit 4, HUB 5), displays the operating state of the system, and is notified of an abnormality from each device. In such a case, the operator is informed so as to be recognizable by display or voice. The monitoring table 7 corresponds to a “monitoring device” in the claims.

Further, as a feature of this system, the relay unit 2, the slave unit 4, and the HUB 5 turn off the operation of the line quality monitoring unit corresponding to the vacant port so that the line state abnormality is not erroneously detected.
The configuration and operation of each device will be described in detail later.

[Configuration of handset 4: Fig. 1]
The structure of the subunit | mobile_unit 4 is demonstrated concretely using FIG. FIG. 1 is a configuration block diagram showing the configuration of the handset 4 of this system.
As shown in FIG. 1, the slave unit 4 includes a slave port 41, a master port 42, a signal processing unit 43, a radio unit 44, an antenna 45, an upper line quality monitoring unit 46, and a lower line quality monitoring unit. 47, a control unit 48, and a nonvolatile memory 49.

  The slave port 41 includes an optical signal transmission / reception unit that transmits / receives an optical signal, and an optical-electrical conversion unit that performs mutual conversion between the optical signal and the electrical signal (not shown), and receives the optical signal from the host device. Then, it is converted into a radio signal, and is output to the signal processing unit 43, the upper line quality monitoring unit 46, and the master port 42. Also, the electrical signal to be sent to the host device is converted into an optical signal and output to the host optical fiber 3. The slave port 41 operates in accordance with the clock of the host device.

  The master port 42 includes an optical signal transmission / reception unit that transmits / receives an optical signal and an optical-electrical conversion unit that performs mutual conversion between the optical signal and the electrical signal (not shown), and receives an optical signal from a lower-level device. Then, it is converted into a radio signal and output to the lower line quality monitoring unit 47 and the slave port 41. In addition, the electrical signal input from the slave port 41 and sent to the lower device is converted into an optical signal and output to the lower optical fiber 3. The master port 42 operates the connected lower device according to its own clock.

  The signal processing unit 43 performs digital signal processing of a radio signal from the host device input from the slave port 41 and outputs the signal as a baseband signal to the radio unit 44 and a mobile station (not shown) input from the radio unit 44. The digital signal processing of the baseband signal is output to the slave port 41.

The radio unit 44 converts the baseband signal into a radio frequency and emits it from the antenna 45 into the air, receives the radio frequency signal, converts it into a baseband signal, and outputs it to the signal processing unit 42.
The antenna 45 transmits and receives radio frequency signals.

  When the slave unit 4 relays a signal from the higher-level device and transmits it to the lower-level device, or relays a signal from the lower-level device and transmits it to the higher-level device, the slave unit 4 performs signal processing or the like inside The slave port 41 and the master port 42 directly exchange signals.

  The upper line quality monitoring unit 46 is a characteristic part of this system. The upper line quality monitoring unit 46 receives a received signal from the upper apparatus input from the slave port 41, monitors the line quality based on the received signal, and detects an abnormality. In this case, a signal indicating that the line quality of the upper line is abnormal is output to the control unit 48.

  Similarly, the lower line quality monitoring unit 47 inputs the received signal from the lower apparatus input from the master port 42, monitors the line quality based on the received signal, and detects an abnormality, A signal indicating that the line quality of the line is abnormal is output to the control unit 48.

The line quality is monitored by a general method. For example, the received signal strength is detected, and when the detected received signal strength is equal to or higher than a preset reference value, it is determined to be normal and less than the reference value. In such a case, a method of determining an abnormality is conceivable.
Alternatively, an error rate may be detected based on an error correction code in the received signal, and if the error rate is higher than a reference value (if there are many errors), it may be determined that the channel quality is abnormal.

  As a feature of this system, the upper line quality monitoring unit 46 and the lower line quality monitoring unit 47 start / stop operation based on an on / off instruction from the control unit 48 when the power is turned on. Here, the operation is normally started (unless there is an instruction), and the operation is stopped when an operation stop instruction is input from the control unit 48.

  The nonvolatile memory 49 is a characteristic part of the present system, and stores data for designating on / off operations of the upper line quality monitoring unit 46 and the lower line quality monitoring unit 47. Since the on / off of the operation of the line quality monitoring unit corresponds to the use / unuse of the port, the port number and its use / unused data may be used.

These data are input from an external input device or transmitted from the monitoring console 7 and set by the control unit 48, for example. In the present embodiment, an instruction to stop the operation of the line quality monitoring unit corresponding to the unused port (line quality monitoring operation stop instruction) is transmitted from the monitoring console 7, and the control unit 48 is nonvolatile based on the information. The on / off operation of the upper line quality monitoring unit 46 and the lower line quality monitoring unit 47 is stored in the performance memory 49. At this time, the operation of the line quality monitoring unit corresponding to the designated port number is set to off.
Further, the port use / unused information is transmitted from the monitoring console 7, and the control unit 48 stores the received port use / unused information in the nonvolatile memory 49 as it is, The line quality monitoring unit corresponding to the “unused” port number may be controlled to stop.

  The non-volatile memory 49 is provided with an area for storing information indicating the unique number of the slave unit 4, the port number of each port, and the ON / OFF of the corresponding line quality monitoring unit in advance. On the basis of the port number specified by the stop instruction, the corresponding line quality monitoring unit ON / OFF) is stored.

Specifically, at the time of system construction, “ON” is stored for the upper line quality monitoring unit 46 when the slave port 41 is connected to the upper apparatus, and “OFF” is stored when it becomes an empty port.
Further, “ON” is stored for the lower line quality monitoring unit 47 when the master port 42 is connected to the lower apparatus, and “OFF” is stored when it is an empty port.
Since the nonvolatile memory 49 stores information even when the power is turned off, it is not necessary to transmit an on / off instruction from the monitoring console 7 every time the power is turned on.

  By default, the operation of the line quality monitoring unit corresponding to the port numbers of the upper line quality monitoring unit 46 and the lower line quality monitoring unit 47 is set to “on” and specified based on the input data. The operation of the line quality monitoring unit corresponding to the port number may be rewritten to “off”.

The control part 48 of the subunit | mobile_unit 4 is comprised by CPU (Central Processing Unit) etc., starts the program memorize | stored in the memory | storage part (not shown), and performs various processes.
The control unit 48 of the slave unit 4 notifies the monitoring console 7 of an abnormality when a signal indicating an abnormality in the line quality is input from the upper line quality monitoring unit 46 or the lower line quality monitoring unit 47.

  Further, as a feature of this system, when the control unit 48 receives a line quality monitoring operation stop instruction from the monitoring console 7, the control unit 48 is configured to turn off the line quality monitoring unit corresponding to the unused port based on the information. The information indicating the on / off operation of the upper line quality monitoring unit 46 and the lower line quality monitoring unit 47 is stored in the memory 49, and the upper line is determined according to the information stored in the nonvolatile memory 49 when the apparatus is turned on. The start / stop operation of the quality monitoring unit 46 and the lower line quality monitoring unit 47 is controlled. Here, when “OFF” is stored in the non-volatile memory 49, the corresponding upper quality monitoring unit 46 or lower line quality monitoring unit 47 is controlled to stop operation.

  As a result, the operation of the upper line quality monitoring unit 46 or the lower line quality monitoring unit 47 corresponding to the unused port can be stopped. It is possible to prevent erroneous detection and to prevent erroneous notification of a line abnormality to the monitoring console 7, thereby improving the reliability of the system and facilitating maintenance.

  Also, when a line quality monitoring operation stop instruction is newly transmitted from the monitoring console 7 after system operation, such as when the system is changed, the control unit 48 stores the instruction in the nonvolatile memory 49 based on the received instruction. Update the information that is being provided.

[Operation of handset 4: FIG. 1]
The operation of the characteristic part of the handset 4 of this system will be described.
When a channel quality monitoring operation stop instruction is input from the outside, the control unit 48 of the slave unit 4 displays information indicating on / off of the operations of the upper channel quality monitoring unit 46 and the lower channel quality monitoring unit 47 according to the instruction. The data is converted and stored in the nonvolatile memory 49. Data transmitted from the monitoring console 7 may be stored. The operation of the line quality monitoring unit corresponding to the unused port is stored as OFF. Here, storage of data in the nonvolatile memory 49 is normally performed at the time of system construction before system operation.

  And the control part 48 of the subunit | mobile_unit 4 reads the information which shows ON / OFF of the operation | movement of the upper line quality monitoring part 46 and the lower line quality monitoring part 47 from the non-volatile memory 49 at the time of power activation, and if it is OFF, Then, the operation of the corresponding line quality monitoring unit is stopped. As a result, the line quality monitoring unit corresponding to the empty port does not operate and does not detect an erroneous line abnormality. In this way, the operation of the handset 4 is performed.

[Configuration of HUB5: FIG. 2]
The configuration of the HUB 5 of this system will be described with reference to FIG. FIG. 2 is a configuration block diagram of the HUB 5.
As shown in FIG. 2, the HUB 5 includes a slave port 51, master ports 52a to 52n, an upper line quality monitoring unit 56, lower line quality monitoring units 57a to 57n, a control unit 58, and a nonvolatile memory 59. It has.
Since each component has the same configuration and operation as those described in the slave unit 4, detailed description thereof is omitted here.

In order to simplify the drawing, only one set of the master port 52a and the lower line quality monitoring unit 57a is shown here, but a plurality of master ports 52a to 52n are provided, and each master port 52 is further provided. The lower channel quality monitoring units 57a to 57n are provided in a one-to-one correspondence. All the lower line quality monitoring units 57 are connected to the control unit 48, and are controlled to be turned on / off by the control unit 48.
Similarly, the upper line quality monitoring unit 56 is also controlled by the control unit 48 to turn on / off the operation.

The nonvolatile memory 59 of the HUB 5 stores data for designating on / off of the operation for the line quality monitoring unit provided in the apparatus, similarly to the nonvolatile memory 49 of the slave unit 4.
Specifically, for the upper line quality monitoring unit 56 and the lower line quality monitoring units 57a to 57n, information indicating on / off of operation according to the connection state of the port corresponding to each line quality monitoring unit is stored. Yes. That is, “ON” is stored for the line quality monitoring unit corresponding to the used port, and “OFF” is stored for the line quality monitoring unit corresponding to the empty port.
For example, by default, the operation of the line quality monitoring unit corresponding to all the port numbers is set to “on”, and the operation of the line quality monitoring unit corresponding to the specified port number is set based on the input data. It may be rewritten to “off”.

The control unit 58 of the HUB 5 notifies the monitoring console 7 of an abnormality when a signal indicating an abnormality in the line quality is input from the upper line quality monitoring unit 56 or the lower line quality monitoring unit 57.
Further, the control unit 58 of the HUB 5 turns on the operations of the upper line quality monitoring unit 56 and the lower line quality monitoring units 57a to 57n in the nonvolatile memory 59 based on the line quality monitoring operation stop instruction transmitted from the monitoring console 7. Information indicating / off is stored. The operation of the line quality monitoring unit corresponding to the port number designated by the line quality monitoring operation stop instruction is stored as OFF, and other line quality monitoring units are stored as ON.

  Then, when the apparatus is turned on, the start / stop of the operations of the upper line quality monitoring unit 56 and the lower line quality monitoring units 57a to 57n are controlled according to the information stored in the nonvolatile memory 59. Here, when information indicating “OFF” is stored in the nonvolatile memory 49, the corresponding upper quality monitoring unit 56 or lower line quality monitoring unit 57 is controlled to stop operation.

[Configuration of repeater 2: FIG. 3]
The configuration of the repeater 2 of this system will be described with reference to FIG. FIG. 3 is a block diagram of the configuration of the repeater 2.
The repeater 2 includes a plurality of master ports 22a to 22n, line quality monitoring units 23a to 23n, a signal processing unit 24, a control unit 25, a radio unit 26, and a nonvolatile memory 27.

  In order to simplify the drawing, only one set of the master port 22a and the line quality monitoring unit 23a is shown here, but a plurality of master ports 22a to 22n are provided, and each master port 22 has a pair. Corresponding to 1, line quality monitoring units 23a to 23n are provided. The master port 22 is the same as the master ports 42 and 52 provided in the handset 4 and the HUB 5, and transmits / receives optical signals to / from lower devices connected by optical fibers.

  The signal processing unit 24 performs digital signal processing of the baseband signal from the lower device input from each master port 22 and outputs the digital signal to the wireless unit 26, and the wireless signal from the upper device input from the wireless unit 26. Digital signal processing is performed, and a baseband signal is sent to the electro-optical conversion unit of each master port 22.

  The radio unit 26 converts the baseband signal from the signal processing unit 24 into a radio frequency and outputs the radio frequency signal to the base station, receives the radio frequency signal from the base station and converts it into a baseband signal, and the signal processing unit 23. Output to.

  Further, as a feature of this system, as in the case of the slave unit 4 and the HUB 5, the nonvolatile memory 27 of the relay unit 2 stores data for designating operation on / off corresponding to each of the line quality monitoring units 23a to 23n. Has been. That is, “ON” is stored for the line quality monitoring unit 23 corresponding to the master port 22 to which the lower level device is connected, and “OFF” is stored for the line quality monitoring unit 23 corresponding to the unused port to which the lower level device is not connected. Is stored.

[Data setting from the monitoring console: Fig. 4]
A sequence for designating ON / OFF of the operation of the line quality monitoring unit for each device from the monitoring console 7 of this system will be described with reference to FIG. FIG. 4 is a schematic explanatory diagram of a sequence for designating on / off of the operation of the line quality monitoring unit from the monitoring console 7 to the repeater 2, the HUB 5, and the slave 4.
As shown in FIG. 4, in the monitoring console 7, the operator inputs a unique number of a device having an unused port, a port number that is an unused port, and a specific instruction for stopping the line quality monitoring operation. Then, an instruction to stop the operation of the port number and the corresponding line quality monitoring unit (line quality monitoring operation stop instruction) is transmitted to the device.

For example, when the monitoring console 7 designates a port number to the repeater 2 and transmits a line quality monitoring operation stop instruction (S1), the control unit 25 of the repeater 2 determines the port based on the received information. The information indicating the operation of the line quality monitoring unit corresponding to the number is set to “off”, and the information indicating the operation of the line quality monitoring unit corresponding to the other port number is set to “on”. Is stored as data designating on / off of the operation (S2).
Then, the control unit 25 transmits a completion notification to the monitoring console 7.

Similarly, data for designating the on / off operation of each line quality monitoring unit is stored in the nonvolatile memory 59 in response to an instruction from the monitoring console 7 for the HUB 5 (S11 to S13).
In addition, for the slave unit 4, data specifying ON / OFF of the operation of the upper line quality monitoring unit 46 and the lower line quality monitoring unit 47 is stored in the nonvolatile memory 49 in accordance with an instruction from the monitoring console 7. (S21-S23).
As a result, even when there is no new instruction from the monitoring console 7 at the next start-up of the device, the control unit of each device reads the data on / off of the operation of the line quality monitoring unit and designates it as off. It is possible to perform control to stop the operation of the line quality monitoring unit.

  When the control unit of each device receives the port number for identifying the master port and the instruction for stopping the corresponding line quality monitoring unit from the monitoring console 7, it corresponds to the port number specified in the instruction in the nonvolatile memory. Information indicating “off” of the operation of the line quality monitoring unit to be stored may be stored, and the operation of the line quality monitoring unit may be stopped according to the information indicating “off”.

[Effect of the embodiment]
According to the wireless communication system according to the embodiment of the present invention, the repeater 2, the slave unit 4, and the HUB 5 are provided with the line quality monitoring unit that monitors the line quality at the port, and when line quality abnormality is detected. Is a wireless communication system in which the control unit notifies the monitoring console 7 of the abnormality, and the relay unit 2, the slave unit 4, and the HUB 5 are turned on / off for the operation of the line quality monitoring unit corresponding to each slave port and master port. A nonvolatile memory for storing data for designating the port, and the control unit turns on / off the operation of the line quality monitoring unit corresponding to the used / unused state of each port based on the pre-input data Is stored in a non-volatile memory, and when the device is turned on, the control unit reads data specifying on / off of the operation of each line quality monitoring unit from the non-volatile memory and stores the data Therefore, the line quality monitoring unit that monitors the line quality of the unused ports determines that the communication quality is poor. To prevent erroneous reporting of errors from the device to the monitoring console 7, reducing the work of the monitoring console operator, facilitating maintenance, and improving system reliability. There is an effect that can.

  Further, according to the present system, the line quality monitoring operation for stopping the operation of the line quality monitoring unit by designating the device number and the port number from the monitoring console 7 to the repeater 2, the slave 4 and the HUB 5 When the stop instruction is transmitted, the designated device receives the instruction, and the control unit stores information indicating the operation of the line quality monitoring unit corresponding to the port number as “off” in the nonvolatile memory based on the instruction. At the same time, since the wireless communication system stops the operation of the line quality monitoring unit corresponding to the port number designated as “off” when the power is turned on, the operation of the line quality monitoring unit is remotely turned on / off from the monitoring console 7. Even if the system configuration changes and the use / unuse status of the port changes, it is possible to easily change the operation of the line quality monitoring unit accordingly. , There is an effect that can facilitate maintenance systems out.

As another example, information indicating ON / OFF of the line quality monitoring unit for each port in each device is stored in a non-volatile memory (not shown) of the base station 1 so that each device is started up. The control unit (not shown) of the base station 1 reads out and transmits information indicating ON / OFF of the line quality monitoring unit for each port in each device stored in the non-volatile memory. The control unit may store information indicating ON / OFF of the operation of each line quality monitoring unit in the nonvolatile memory, and stop the operation of the line quality monitoring unit corresponding to the port number designated as “OFF”. Good.
Further, the port designated by the control unit of each device as “OFF” without storing the information in the nonvolatile memory in accordance with the ON / OFF data of the line quality monitoring unit for each port from the base station 1 The operation of the line quality monitoring unit corresponding to the number may be stopped.

  Further, in the present embodiment, the slave unit 4 and the HUB 5 control the operation / stop of the line quality monitoring unit for both the slave port and the master port, but only the master port connected to the lower level is subject to control. In this case, it is possible to stop only the lower line quality monitoring unit, and even in that case, the same effect as that of the present system can be obtained, and the configuration and operation of the apparatus can be simplified.

  In this embodiment, an optical transmission system including an optical fiber has been described. However, depending on whether a port is used or not, a wireless communication system including a cable that transmits a high-frequency signal is used instead of the optical fiber. The information indicating whether the line quality monitoring unit is turned on / off is stored in the nonvolatile memory, and the control unit turns the operation of the line quality monitoring unit on or off when the apparatus is turned on accordingly. It is obtained.

  The present invention is a wireless communication system capable of preventing an erroneous abnormality report from being output from a lower-level device in a system in which slave units and HUBs are connected in multiple stages, improving system reliability, and facilitating maintenance. Suitable for

It is a block diagram which shows the structure of the subunit | mobile_unit 4 of the radio | wireless communications system which concerns on embodiment of this invention. It is a block diagram of the configuration of HUB5. FIG. 3 is a block diagram illustrating the configuration of the relay device 2. It is a schematic explanatory diagram of a sequence for designating on / off of the operation of the line quality monitoring unit from the monitoring console 7 to the repeater 2, HUB 5, and handset 4. It is a schematic explanatory drawing which shows the structural example of the radio | wireless communications system provided with the subunit | mobile_unit which can be connected in a chain type | mold, and HUB.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Base station, 2 ... Repeater, 3 ... Optical fiber, 4 ... Slave unit, 5 ... HUB, 22, 42, 52 ... Master port, 24, 43 ... Signal processing part, 25, 48, 58 ... Control part, 26, 44 ... wireless unit, 27, 49, 59 ... non-volatile memory, 41, 51 ... slave port, 45 ... antenna, 46, 56 ... upper channel quality monitoring unit, 47, 57 ... lower channel quality monitoring unit

Claims (2)

A relay that distributes and outputs signals from the base station to the lower level via a plurality of master ports, a hub that receives signals from the upper level and distributes and outputs them to the lower levels via a plurality of master ports, and a signal received from the upper level A wireless communication system including a slave unit that amplifies and outputs from the antenna, and outputs from the master port to the lower order,
The repeater, the hub, and the slave are
A line quality monitoring unit that monitors the line quality corresponding to the master port in each device;
A control unit for notifying the host monitoring device of the abnormality when a line quality abnormality is detected by the line quality monitoring unit;
Each line quality monitoring unit includes a non-volatile memory that stores information indicating operation on / off,
When the control unit receives from the monitoring device a port number that identifies a master port that is an unused port and an instruction to stop the corresponding line quality monitoring unit, the non-volatile memory is designated by the instruction. Stores information indicating “off” of operation for the line quality monitoring unit corresponding to the port number, and stops the operation of the line quality monitoring unit according to the information indicating “off”. Radio communication characterized in that information indicating on / off of operation for each line quality monitoring unit is read from a non-volatile memory, and operation of the line quality monitoring unit storing information indicating "off" is stopped. system. A relay that distributes and outputs signals from the base station to the lower level via a plurality of master ports, a hub that receives signals from the upper level and distributes and outputs them to the lower levels via a plurality of master ports, and a signal received from the upper level A wireless communication system including a slave unit that amplifies and outputs from the antenna, and outputs from the master port to the lower order,
The repeater, the hub, and the slave are
A line quality monitoring unit that monitors the line quality corresponding to the master port in each device, and a control unit that notifies the abnormality to a higher-level monitoring device when a line quality abnormality is detected by the line quality monitoring unit. Prepared,
The base station stores a port number for identifying a master port that is an unused port of a lower-level device and information for stopping a line quality monitoring unit corresponding to the port number, and is stored in the nonvolatile memory. And a control unit for transmitting the port number and information to the lower device,
When the relay unit, the hub, and the control unit of the slave unit receive from the base station information for stopping the port number that identifies the master port that is an unused port and the corresponding line quality monitoring unit, A wireless communication system, wherein operation of the line quality monitoring unit is stopped according to the information.

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