JP5114335B2 - Maintenance monitoring control system and maintenance monitoring control method for amplifier - Google Patents

Description

  The present invention relates to a maintenance monitoring control system and a maintenance monitoring control method for performing maintenance monitoring control of an amplification device remotely installed from a modulation / demodulation device of a radio base station device via a transmission line such as an optical fiber.

  As an amplification device of a radio base station device, a transmission amplification device (AMP: AMPlifier) that is arranged adjacent to a modulation and demodulation device (MDE) and connected by a coaxial cable, and remotely installed from the MDE section via an optical fiber cable And an optical overhanging transmitter / receiver (OF-TRX) connected in the network. The AMP unit is provided with an outdoor reception amplifier (OARA: Open Air Receiver Amplifier) and an outdoor reception amplifier monitoring controller (OARASC: Open Air Receiver Amplifier Supervisory Controller) for monitoring and controlling the OARA unit. In addition to OARA, external devices that are subject to monitoring control as viewed from the MDE unit include power supply equipment, antenna tilt control BOX, maintenance tools, and the like.

  Conventionally, an OARASC unit, which is an external device of the AMP unit, is connected to the MDE unit by a monitoring cable, and a maintenance monitoring control signal is directly transmitted and received between the OARASC unit and the AMP unit. Similarly, an external device such as a power supply facility installed in the vicinity of the MDE unit is also connected with a monitoring cable so that a maintenance monitoring control signal of the power supply facility can be directly captured.

  It is also necessary to perform maintenance monitoring control of the OF-TRX unit installed remotely from the MDE unit and the associated external device. When performing maintenance monitoring control of the OF-TRX unit and the associated external device remotely installed from the MDE unit, the configuration information of the OF-TRX unit and the external device is input in advance to the MDE unit and grasped. It is considered that the maintenance monitoring control signal is transmitted and received by communicating via an optical fiber cable between the unit and the OF-TRX unit.

By the way, when the outdoor installation space near the antenna cannot be secured, it is conceivable to adopt a system configuration in which the AMP unit is remotely installed and the MDE unit and the AMP unit are connected by an optical fiber. That is, it is considered that the AMP part is exposed to light.
JP 2003-37551 A JP 2007-306362 A

  However, when the AMP unit is overhanged and remotely installed from the MDE unit, it is expensive to connect the MDE unit and an external device attached to the AMP unit with a monitoring cable as in the conventional system. There is. It is desirable to send and receive the maintenance monitoring control signal of the external device using an optical fiber cable that connects the MDE unit and the AMP unit. In this case, the monitoring control control of the external device via the AMP unit is desired. A mechanism is required.

  In addition, when communicating with the extension device to be monitored and controlled from the MDE unit, since there are a plurality of device types (AMP unit and OF-TRX unit), the same method as the conventional monitoring control for the OF-TRX unit is adopted. In this case, the maintenance monitoring control must be performed in consideration of the device type in the MDE unit, and there is a problem that the processing in the MDE unit becomes complicated.

  The present invention has been made in view of such points, and an amplification device that enables maintenance monitoring control of the amplification device and the associated external device from the MDE unit without being conscious of the device type of the remotely installed amplification device. It is an object of the present invention to provide a maintenance monitoring control system and a maintenance monitoring control method.

The maintenance monitoring control system of the present invention divides the monitoring control range of the amplifying device into sectors, establishes a monitoring control link for each sector between the amplifying device and the modem, and uses the links as a sector unit. of a supervisory control and maintenance monitor control systems that practice, divided monitoring control range of the amplifier, and the functional portion of the sector unit, in a common portion constituted by functional unit having at amplifier units, sector The monitoring control of the common unit is performed through a representative link selected from a plurality of links established in units.

According to this configuration, the monitoring control range of the amplifying device is divided into sectors, and a monitoring control link is established for each sector so that monitoring control is performed. Therefore, the maintenance monitoring control can be performed, and the processing in the modem can be simplified. In addition, with this configuration, monitoring control of the common unit is performed via a representative link selected from a plurality of links established on a sector basis, so there is no need to provide a dedicated monitoring cable in the common unit, reducing costs. Can be achieved.

  According to the present invention, in the maintenance monitoring control system, when a failure occurs in the representative link, the representative link is switched to another link.

  With this configuration, if a failure occurs in the representative link used for monitoring control of the common unit, the representative link can be switched to another link, so that monitoring control of the common unit can be continued, and maintenance monitoring of the entire amplification device The situation where control becomes impossible can be prevented.

  According to the present invention, it is possible to perform maintenance monitoring control of the amplification device and the associated external device from the MDE unit without being aware of the device type of the remotely installed amplification device.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
FIG. 1 is a conceptual diagram of a radio base station apparatus to which a maintenance monitoring control system according to an embodiment of the present invention is applied. The radio base station apparatus includes an MDE unit 1, an optical extension AMP unit 3 installed at a remote location from the MDE unit 1 and connected to the MDE unit 1 via an optical fiber cable 2, and an MDE unit 1 installed in each sector. And a plurality of OF-TRX units 5-1 to 5-n connected via optical fiber cables 4-1 to 4-n.

  The MDE unit 1 includes a maintenance monitoring control unit 11, a baseband signal processing function unit 12, and a call processing control function unit and a transmission path interface function unit which are not shown. The maintenance monitoring control unit 11 is a functional unit that performs maintenance monitoring control of the light projection AMP unit 3 and the OF-TRX units 5-1 to 5-n. The baseband signal processing function unit 12 is divided into a plurality of blocks 12-1 to 12-n corresponding to the OF-TRX units 5-1 to 5-n installed in each sector, and has a modulation / demodulation function of the control channel and the communication channel. Have.

  FIG. 2 is a diagram showing a functional unit configuration of the light projection AMP unit 3. The optical extension AMP unit 3 includes a transmission / reception function unit (TRX) 13 that performs modulation / demodulation accompanying transmission / reception, an amplification unit (T-PA) 14 that amplifies the transmission signal modulated by the transmission / reception function unit (TRX) 13, and a transmission / reception function. A transmission / reception aggregation unit (TRX-INF) 15 that aggregates transmission / reception signals input / output to / from the unit (TRX) 13 in units of sectors, and a common unit 16 that includes functional units in units of AMP units. The functional unit possessed by the AMP unit may include a functional unit having an interface with an external device, a functional unit for monitoring and controlling external devices, and a common unit card for storing files depending on the implementation.

  The RRH-equipped AMP unit 3 can support one sector with a transmission / reception function unit (TRX) 13, an amplification unit (T-PA) 14, and a transmission / reception aggregation unit (TRX-INF) 15. It has a functional unit configuration that can correspond to sector #n. A transmission / reception aggregation unit (TRX-INF) 15 provided for each sector is connected to the MDE unit 1 by optical fiber cables 2-1 to 2-n.

  The light projecting AMP unit 3 is provided with an OARA unit 17 and an OARASC unit 18 attached thereto. The OARA unit 17 includes a duplexer (DUP) 19 that selectively connects a transmission side and a reception side to an antenna, and a low noise amplifier (LNA) 20 that amplifies a reception signal received by the antenna. . In the example shown in the figure, two antennas are provided for diversity reception, and a duplexer (DUP) 19 and a low noise amplifier (LNA) 20 are provided for each antenna. The OARASC unit 18 monitors and controls the OARA unit 17 and transmits a monitoring control signal to the MDE unit 1 via the common unit 16. In this embodiment, the OARA unit 17 is illustrated as an external device. However, as described above, in addition to OARA, power supply equipment, antenna tilt control BOX, maintenance tools, and the like can be included in the concept of the external device.

  In FIG. 2, the monitoring control range of the light projection AMP unit 3 is indicated by a dotted line. The optical projection AMP unit 3 has a functional unit configuration corresponding to a plurality of sectors, the functional units for a plurality of sectors are divided in units of sectors, and the functional unit corresponding to one sector is included in one monitoring control range. Is set. The common unit 16 is set as one monitoring control range. Links 30-1 to 30-n for monitoring and control are established with the MDE unit 1 in units of sectors, and the common unit 16 uses an arbitrary link 30-1 as a representative link and communicates with the MDE unit 1. Send and receive supervisory control signals. As described above, the functional units (excluding the common unit 16) of the optical extension AMP unit 3 are divided into sector units to form a monitoring control range, and links 30-1 to 30-n are established for each sector. The supervisory control has a redundant configuration by using a switchable representative link.

  FIG. 3 is a diagram illustrating a functional unit configuration of the OF-TRX unit 5-1. A transmission / reception function unit (TRX) 21 that performs modulation / demodulation accompanying transmission / reception, an amplification unit (AMP) 22 that amplifies a transmission signal modulated by the transmission / reception function unit (TRX) 21, and a low-noise amplifier (LNA) that amplifies the reception signal 23 and duplexers (DUP) 24 that selectively connect the transmission side and the reception side to the antenna are provided for two systems, and are aggregated by a transmission / reception aggregation unit (TRX-INF) 25. Moreover, the common part 26 which monitors the external apparatus attached to the OF-TRX part 5-1 is provided. In the example shown in the figure, two antennas are provided for diversity reception. The other OF-TRX units 5-2 to 5-n have the same functional unit configuration as the OF-TRX unit 5-1.

  In FIG. 3, the monitoring control range of the OF-TRX unit 5-1 is indicated by a dotted line. One OF-TRX section 5-1 to 5-n is installed in one sector. Regardless of the device type of the AMP unit and OF-TRX, the light projecting device sets one monitoring control range in the functional unit for one sector. Therefore, in the OF-TRX unit 5-1 equipped with a functional unit for one sector, one monitoring control range is set as a whole except the common unit 26, and one monitoring control range is set in the common unit 26. One monitoring control link 31-1 is established with the MDE unit 1, and the common unit 26 transmits and receives a monitoring control signal to and from the MDE unit 1 using the link 31-1 as a representative link. .

  In the other OF-TRX units 5-2 to 5-n, as in the OF-TRX unit 5-1, one monitoring control range is set as a whole, and one monitoring control range is set in the common unit 26. One monitoring control link 31-2 to 31-n is established with the MDE unit 1.

  The maintenance monitoring control unit 11 which is a functional unit of the MDE unit 1 performs the AMP unit 3 and OF-TRX units 5-1 to 5-n which are amplification devices having different device types in units of links without being conscious of the device type. Implement supervisory control. The maintenance monitoring control unit 11 includes link numbers assigned to the individual links 30-1 to 30-n and links 31-1 to 31-n established between the AMP unit 3 and the OF-TRX units 5-1 to 5-n. And the monitoring target AMP / OF-TRX is recognized by the link number. FIG. 4 is an explanatory diagram for explaining the relationship between the link number and the amplification device. In FIG. 4, OF-TRXs 5-1 5-2, and 5-n are assigned to link numbers # 1, # 2, and # 8, and sectors # 1 to ## of AMP unit 3 are assigned to link numbers # 3 to # 7. 5 is assigned. A representative link is determined from among the link numbers # 3 to # 7 to which the sectors # 1 to # 5 of the AMP unit 3 are assigned. The link numbers # 1, # 2, and # 8 to which OF-TRXs 5-1 5-2, and 5-n are assigned also serve as representative links.

  The MDE unit 1, the AMP unit 3, and the OF-TRX units 5-1 to 5-n implement a common interface that defines a common data format and sequence for maintenance monitoring control in units of links. As a result, even if the vendors of the MDE unit 1, the AMP unit 3, and the OF-TRX units 5-1 to 5-n are different, communication related to maintenance monitoring control is possible by mounting a common interface in units of links. Become.

  FIG. 5 is a diagram showing a protocol stack of the common interface. Layer 1 uses optical signals to enable long-distance connections. In Layer 2, user data is mapped as digital IQ data using IQ Data, Layer 1 maintenance monitoring control is performed using L1 Inband Protocol, and data transmission control procedures for maintenance monitoring control signals are defined using HDLC. In Layer 3, the control control data between the MDE unit 1 and the light projecting devices (AMP unit 3 and OF-TRX units 5-1 to 5-n) is defined by Control & Management Plane. Link switching control in the event of a representative link failure is executed by Layer 3 Control & Management. Layer 4 is a vendor and carrier application that works with Layer 3 to provide maintenance monitoring and call processing functions.

Next, the operation of the present embodiment configured as described above will be described.
FIG. 6 is a diagram illustrating a procedure for determining a representative link.
The MDE unit 1 activates the opposing device (AMP unit 3 and OF-TRX units 5-1 to 5-n) (step S1), and the AMP unit 3 (sector unit) and OF-TRX units 5-1 to 5-n. Establish a link with n. As shown in FIG. 4, when it is recognized from the link number that the opposite device is the OF-TRX unit 5-1 to 5-n, one link is established between each of the OF-TRX units 5-1 to 5-n. Therefore, the link (link numbers # 1, # 2, # 8) is set as a representative link (step S2).

  On the other hand, when it is recognized from the link number that the opposite device is the AMP unit 3 (step S2), a plurality of link numbers corresponding to a plurality of sectors are set in the AMP unit 3, and therefore, the representative link is selected from among them. Select (step S3). In the example shown in FIG. 4, link numbers # 3 to # 7 are assigned to the AMP unit 3, and a representative link is selected from these. If there is a representative link, the representative link determination process ends. If it is not yet determined, one of the link numbers # 3 to # 7 assigned to the AMP unit 3 is determined as the representative link (step S4). The determined representative link information is notified to the AMP unit 3, and the process proceeds to the process of establishing the common unit link.

  Since the AMP unit 3 supports a plurality of sectors, a plurality of links are established with the MDE unit 1. In the AMP unit 3, the representative link is set to Active among a plurality of links, and the normal link that is not the representative link is set to Negative. When the representative link information is received from the MDE unit 1, it is determined whether the link number designated by the MDE unit 1 can be used as the common unit link (step T1). Unless there is a special circumstance such as a failure in the designated link number, the designated link number is set as the representative link regardless of the current setting. If the representative link is set as specified, OK is returned. If the representative link is not set due to special circumstances, NG is returned (step T1). As described above, the representative link used for monitoring control of the common units 16 and 26 in the AMP unit 3 and the OF-TRX units 5-1 to 5-n can be determined.

  After the representative link is determined, the maintenance monitoring control unit 11 of the MDE unit 1 performs sector-by-sector monitoring on all links established between the AMP unit 3 and the OF-TRX units 5-1 to 5-n (steps). S5). The maintenance monitoring control unit 11 performs sector-by-sector monitoring control on the AMP unit 3 via the links 30-1 to 30-n for each sector. Further, by performing monitoring control on the common unit 16 of the AMP unit 3 via the representative link, monitoring control via the AMP unit 3 can be realized for the external devices (17, 18) attached to the AMP unit 3 as well. . The maintenance monitoring control unit 11 performs monitoring control on the OF-TRX units 5-1 to 5-n via the links 31-1 to 31-n for each sector. Since one OF-TRX unit 5-1 to 5-n is installed in one sector, the monitoring control range of one sector is provided by one link as in the AMP unit 3. Since each sector of the MDE unit 1 and the AMP unit 3 is connected by an independent link, the maintenance monitoring control in units of sectors as described above can be performed asynchronously. By performing maintenance monitoring control asynchronously for each link, flexible response is possible.

  FIG. 2 schematically shows a state where the link 30-1 of sector # 1 in the AMP unit 3 is a representative link. Maintenance monitoring control signals of the common unit 16 that monitors the external devices 17 and 18 are transmitted and received via the representative link 30-1. Since the representative link 30-1 is used to perform maintenance monitoring control of the common unit 16 in the AMP unit 3, when the failure occurs in the representative link, not only the sector # 1 but also the entire maintenance monitoring control of the AMP unit 3 is performed. The effect is large because it becomes impossible.

  In the present embodiment, the situation where maintenance monitoring control of the entire AMP unit 3 becomes impossible is prevented by switching the representative link.

  FIG. 7 is a diagram showing a procedure for switching the representative link. The AMP unit 3 implements the common interface (FIG. 5) for each link, and performs failure detection for all layers (Layer 1 to Layer 4). When it is detected that a failure has occurred in the active setting link (representative link) (step T10), the setting of the link is changed from the active setting to the negative setting (step T11). The link setting information (Active setting / Negative setting) in the AMP unit 3 is sent to the MDE unit 1 through a common interface mounted on each corresponding link.

  On the other hand, when the current representative link is changed from the Active setting to the Negative setting, the common part link establishment NG requesting not to use the failure detection link as the common part link is autonomously transmitted (step T12). Or it may replace with transmitting common part link establishment NG, and may perform Negative response.

  Each link from the AMP unit 3 and the OF-TRX units 5-1 to 5-n via the link established by the MDE unit 1 between each sector of the AMP unit 3 and the OF-TRX units 5-1 to 5-n. Active setting / Negative setting information is periodically acquired. The MDE unit 1 monitors the Active setting link which is the current representative link (step S20). When a representative link with no Active setting is detected (step S21), it is determined whether another link at the switching destination is normal (step S22). If all the links in the AMP unit 3 are faulty or NG, the representative link cannot be switched, and the process ends. If there is a normal link in another link, one of the normal links is determined as the representative link (step S23). The determined representative link information is sent to the corresponding sector of the AMP unit 3 via the link.

  The AMP unit 3 receives representative link information from the MDE unit 1 via the link designated as the representative link. It is determined whether the link that has received the representative link information from the MDE unit 1 can be used as a common unit link (step T13). Unless there is a special circumstance such as a failure in the link number designated as the representative link, the designated link number is set to Active and set as the common link (representative link). If the representative link is set as specified, OK is returned. If the representative link is not set due to special circumstances, NG is returned (step T13). FIG. 8 shows how the representative link is switched to another normal link 30-n because a failure has occurred in the current representative link 30-1. For example, if all the other links 30-2 to 30-n are normal, any link may be used as the representative link.

  As described above, according to the present embodiment, the amplifying apparatus for a plurality of sectors sets a maintenance monitoring control range for each sector, and sets one maintenance monitoring control range as one sector for the amplifying apparatus for one sector. Set and establish one link in each maintenance monitoring control range for each sector, and perform maintenance monitoring control for each sector (link), so maintenance monitoring control is performed without being aware of the device type and device configuration of the amplifier. The processing in the MDE unit 1 can be simplified.

  In addition, a representative link is selected from a plurality of links established for the maintenance monitoring control range (sector) other than the common part, and the common part is used as a common part link for maintenance monitoring control. There is no need to install a separate cable, and the cost increase due to the provision of a dedicated monitoring cable can be prevented.

  Further, according to the present embodiment, when a failure occurs in the representative link used as the common unit link, the representative link is switched to another normal link, so that the overall maintenance monitoring control of the AMP unit 3 becomes impossible. Can be prevented.

  The present invention is applicable to a maintenance monitoring control device for an amplifying device in a radio base station device in which an AMP portion is light-projected.

1 is a conceptual diagram of a radio base station apparatus to which a maintenance monitoring control system according to an embodiment is applied. The figure which shows the function part structure of the light projection AMP part with which one embodiment was equipped The figure which shows the function part structure of OF-TRX part with which one embodiment was equipped Explanatory drawing explaining the relationship between a link number and an amplifier The figure which shows the protocol stack of the common interface in one Embodiment The figure which shows the determination procedure of a representative link in one embodiment. The figure which shows the switching procedure of a representative link in one embodiment. A diagram showing how a representative link is switched to another normal link

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 MDE part 2 Optical fiber cable 3 Optical extension AMP part 4-1 to 4-n Optical fiber cable 5-1 to 5-n OF-TRX part 11 Maintenance monitoring control part 12 Baseband signal processing function part 13 Transmission / reception function part ( TRX)
14 Amplification part (T-PA)
15 Transmission / Reception Aggregation Unit (TRX-INF)
16 Common part 17 OARA part 18 OARASC part 19 Duplexer (DUP)
20 Low noise amplifier (LNA)
30-1 to 30-n link (AMP part)
31-1 to 31-n links (OF-TRX part)

Claims (7)

The monitoring control range of the amplifier is divided into sectors, to establish a link for monitoring control for each sector between the amplifier and the modulation and demodulation equipment, maintenance you implement supervisory control of sector unit via a link In the monitoring control system , the monitoring control range of the amplifying device is divided into a functional unit in units of sectors and a common unit composed of functional units in units of amplifying devices, and a plurality of links established in units of sectors A maintenance monitoring control system that performs monitoring control of the common unit via a selected representative link. When a failure occurs in the representative link, the maintenance monitor control system according to claim 1, wherein the switching the representative link to another link. A plurality of sectors and a corresponding amplification unit and 1 sector corresponding amplifier is mixed is connected to the modem, according to claim 1 or claim 2 which comprises carrying out the asynchronous monitoring control for the amplifier in sectors The maintenance monitoring control system described. The maintenance monitoring control signal according to any one of claims 1 to 3 , wherein a maintenance monitoring control signal is transmitted / received between each of the amplification devices and the modulation / demodulation device via a common interface common to all links. Control system. The monitoring control range of the amplifier is divided into sectors, to establish a link for monitoring control for each sector between the amplifying device, meet varying demodulator you implement supervisory control of sector unit via a link A modulation / demodulation apparatus that performs monitoring control of a common unit composed of functional units of each amplification apparatus via a representative link selected from a plurality of links established in units of sectors. An amplifying apparatus that is connected to a modem via an optical fiber and has a functional part corresponding to a plurality of sectors and a common part composed of a functional part for each amplifying apparatus, and divides the monitoring control range into sectors, A link for monitoring control is established for each sector with the modem, and monitoring control in units of sectors is performed via the link, and the representative link selected from the plurality of links established in units of sectors is used. An overhanging amplifying apparatus characterized by performing monitoring control of a common part . The monitoring control range for each functional unit of the amplifying device is divided into sectors, a monitoring control link is established for each sector between the amplifying device and the modem, and the monitoring control for each sector is performed via the link. a maintenance monitoring control how to multiple the monitoring control range of the amplifier, and the functional portion of the sector unit, divided into a common portion constituted by the functional unit having at amplifier units was established in sectors A maintenance monitoring control method, wherein monitoring control of the common unit is performed via a representative link selected from among links.

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