JP2010171739A - Wireless communication system, wireless device, and maintenance monitoring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless device which allows connection via a simple and low cost interface without damaging an architecture, and can transmit and receive maintenance monitoring information between wireless devices even in the wireless devices having the architecture assuming chain connections. <P>SOLUTION: A wireless communication system includes the wireless devices and a wireless control device. Each wireless device includes a high-speed interface unit for connecting with a high-speed line, a low-speed interface unit for connecting with a low-speed line, and an intermediate multiplexing unit for multiplexing data obtained through the low-speed interface unit. The wireless communication system transmits and receives the maintenance monitoring data of the wireless device between the other wireless devices through the low-speed interface unit, multiplexes the maintenance monitoring data received through the low-speed interface unit by the intermediate multiplexing unit, and transmits the maintenance monitoring data multiplexed with the wireless control device through the high-speed interface unit to the wireless communication control device. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wireless communication system, a wireless device, and a maintenance monitoring method, and more particularly to a technique preferably applied to a wireless communication system using a high-speed interface as a means for transmitting a signal to a wireless device installed at a remote place, for example. Is.

  In recent years, in a wireless communication system, a one-to-n connection mode in which a wireless control device and a wireless device are installed at a remote location and a high-speed line such as an optical fiber is connected between them is generalized. In addition, the number of cases in which a CPRI (Common Public Radio Interface) is used for an interface unit between a radio control apparatus and a radio apparatus is increasing.

  As an example of a wireless communication system using CPRI, there is a configuration shown in FIG. In this system, a CPRI that has been disclosed as a means for transmitting a signal to a remotely installed wireless device is employed. In other words, the radio control device and the radio device constituting the radio communication system are connected via the CPRI to perform data communication. REC (Radio Equipment Control) represents a radio control device, and RE (Radio Equipment) represents a radio device. The CPRI interface also includes a chain-type interface that continuously connects the first radio apparatus (RE (Master Unit)) 110 and the second radio apparatus (RE) 120, and is accommodated in the CPRI signal. It also has a function of relaying data and maintenance monitoring signals for a plurality of wireless devices.

  The configuration and operation of the wireless device illustrated in FIG. 6 will be described. The CPRI signal transmitted from the wireless control device 8 is input to the first wireless device 110 via the interface unit (INF) 21. The multiprocessing unit (DEMUX / MUX) 3d separates the data of the area allocated to the first radio apparatus 110 from this data series, and converts the user data (Ud) to the radio unit (RFU) 5r and the maintenance monitoring data (Cd ) To the monitoring unit (SV unit) 5s. The CPRI data to the second wireless device 120 and other wireless devices chained thereafter is transmitted as it is and transferred to the second wireless device 120 via the interface unit (INF) 21b.

  The monitoring unit 5s includes a maintenance monitoring signal for a unit inside the first wireless device 110 (for example, an alarm signal for the wireless unit 5r included in the wireless device, an alarm signal for the other unit (Other Unit) 5t included in the wireless device, It has a function of generating maintenance monitoring data (Cu) by integrating external device (EX Unit) 7 alarm signals and the like installed outside the device. The generated maintenance monitoring data (Cu) is input to the multiprocessing unit (MUX / DEMUX) 3u together with the user data (Uu) similarly processed by the wireless unit 5r, and is converted into a high-speed signal input from the second wireless device 120. Multiplexed and sent to the wireless control device 8.

  By the way, in Patent Document 1, as a means for coping with a CPRI link failure of a radio base station adopting CPRI as an internal interface between a radio control unit and a radio unit at low cost, circuit detour using a vendor-specific area of CPRI. A scheme is disclosed. In the invention of Patent Document 1, the redundant configuration of the CPRI link between the radio control unit and the radio unit is not required, and the transmission capacity of the CPRI link between the radio control unit and the radio unit is not increased. The detour route between the radio control unit and the radio unit can be constructed at a low cost.

JP 2008-99137 A

  As described above, CPRI provides an excellent method capable of multiplexing user data and maintenance monitoring data when a plurality of wireless devices are chain-connected relatively far away from the wireless control device. On the other hand, for example, in an area such as a mobile phone base station installed in a large city where a large amount of traffic is expected, wireless devices are often installed close to each other. In this case, as shown in FIG. 7, since the radio apparatus is installed near the radio control apparatus, each radio apparatus is often directly connected to the radio control apparatus via a CPRI link instead of a chain connection. Thus, when each radio | wireless apparatus is directly connected with a radio | wireless control apparatus, the interface (INF21b) for chain connection is not used, but it becomes a system excessive structure.

  On the other hand, it is desirable that the wireless device can be connected not only to the wireless control device but also to other wireless devices so that maintenance monitoring data can be transmitted and received. If there is a failure in the CPRI link with the wireless control device, maintenance monitoring data of the wireless device connected to the wireless control device cannot be sent to the wireless control device, which makes it difficult for the wireless control device to grasp the wireless device abnormality. It is. Of course, wireless devices can also be connected to each other using the INF 21b. However, the INF 21b considering a relatively long distance connection often uses an expensive device such as an optical / electrical conversion module, and is expensive as a system configuration for connecting wireless devices installed relatively close to each other. turn into. Therefore, when the wireless device is installed relatively close in consideration of cost, it is necessary to use a cheaper interface. Also, in order to be able to support both direct connection with wireless control devices, connection between wireless devices, and chain connection, damage to existing wireless device equipment (equipment inside equipment and architecture of chain connection) It is preferable to use it without any problems.

  The above Patent Document 1 is intended to cope with a CPRI link failure between a radio control apparatus and a radio apparatus at a low cost, and the radio apparatus is not directly connected to the radio control apparatus by CPRI instead of chain connection. It is not intended to eliminate systematic overconfiguration when connected. Also, wireless devices are not intended to communicate with each other through an inexpensive interface.

  Therefore, the present invention enables a wireless device having an architecture assuming a chain connection to be connected with a simple and inexpensive interface without losing the architecture, and to transmit / receive maintenance monitoring information between the wireless devices. For the purpose.

  In order to achieve this object, a wireless communication system of the present invention is a wireless communication system including a wireless device and a wireless control device that monitors and controls the wireless device, and the wireless device is a high-speed wireless communication device. A high-speed interface unit for connecting to a line for data communication, a low-speed interface unit for connecting to a low-speed line for data communication, and an intermediate multiplexing processing unit for multiplexing data acquired via the low-speed interface unit The wireless device maintenance monitoring data is transmitted / received to / from other wireless devices via the low speed interface unit, and the maintenance monitoring data received via the low speed interface unit is multiplexed by the intermediate multiplexing processing unit. Then, the multiplexed maintenance monitoring data is transmitted to the radio network controller via the high-speed interface unit.

The wireless device of the present invention is a wireless device that constitutes a wireless communication system together with a wireless control device that performs monitoring control, and is connected to a high-speed interface for performing data communication by connecting to a high-speed line, A low-speed interface unit for performing data communication, and an intermediate multiplex processing unit that multiplexes data acquired via the low-speed interface unit, and communicates with other wireless devices via the low-speed interface unit The maintenance monitoring data of the wireless device is transmitted / received, the maintenance monitoring data received via the low-speed interface unit is multiplexed by the intermediate multiplexing processing unit, and multiplexed with the wireless control device via the high-speed interface unit Maintenance monitoring data is transmitted to the wireless control device.

  A maintenance monitoring method of the present invention is a maintenance monitoring method in a wireless communication system including a wireless device and a wireless control device that monitors and controls the wireless device, and the wireless device includes a high-speed line. A high-speed interface unit for connecting and performing data communication; and a low-speed interface unit for connecting to a low-speed line and performing data communication. Receiving the maintenance monitoring data of the device and acquiring the maintenance monitoring data of the device, receiving the maintenance monitoring data of the device from another wireless device via the low-speed interface unit, and maintaining the acquired device Multiplexed using the monitoring data and the maintenance monitoring data received from other wireless devices, and multiplexed via the low-speed interface unit A transmitting maintenance monitoring data to other wireless devices, through a high-speed interface unit, and transmitting the maintenance monitoring data generated is multiplexed to the wireless control device.

  According to the present invention, even a wireless device having an architecture assuming a chain connection can be connected with a simple and inexpensive interface without damaging the architecture, and maintenance monitoring information can be transmitted and received between wireless devices. It becomes.

It is the figure which showed the structure of the radio | wireless communications system which concerns on this invention. It is the block diagram which showed the internal structure of the radio | wireless apparatus which concerns on embodiment of this invention. It is the figure which showed the structure of the radio | wireless communications system which concerns on embodiment of this invention. It is a figure for demonstrating the data multiplexing process of the radio | wireless apparatus which concerns on embodiment of this invention. It is a figure for demonstrating the data multiplexing process of the radio | wireless apparatus which concerns on embodiment of this invention. It is a figure which shows one structural example of the radio | wireless communications system using CPRI. It is a figure which shows one structural example of the radio | wireless communications system using CPRI.

  FIG. 1 is a diagram showing a configuration of a wireless communication system according to the present invention. The wireless communication system includes a plurality of wireless devices 10 a and 10 b and a wireless control measure 20. The wireless device 10a corresponds to the wireless device recited in the claims, the wireless device 10b corresponds to the other wireless device recited in the claims, and the wireless control device 20 corresponds to the wireless control device recited in the claims. In FIG. 1, only the wireless device 10b is described as another wireless device, but at least one other wireless device may be provided, and a plurality of wireless devices may be configured. In addition, the wireless device 10a and the wireless device 10b have different functional positions on the transmission and reception sides of the maintenance monitoring data via the low-speed interface, but have the same configuration and perform the same operation. Only 10a will be described.

The wireless device 10a includes a high-speed interface unit 11a, an intermediate multiplex processing unit 12a, and a low-speed interface unit 16a. The high-speed interface unit 11a corresponds to the high-speed interface unit described in the claims, the intermediate multiplex processing unit 12a corresponds to the intermediate multiplex processing unit described in the claims, and the low-speed interface unit 16a corresponds to the low-speed interface described in the claims. Corresponding to the part. The high-speed interface unit 11a is an interface for connecting the wireless control device 20 and the wireless device 10a and performing data communication through a high-speed line. The low-speed interface unit 16a is an interface for connecting the wireless device 10a and the wireless device 10b and performing data communication through a low-speed line.

  The intermediate multiplex processing unit 12a multiplexes the data acquired through the low speed interface unit 16a before transmitting the multiplexed data through the high speed interface unit 11a. The intermediate multiple processing unit 12a includes a first intermediate processing unit 13a, a maintenance monitoring unit 14a, and a second intermediate processing unit 15a. The first intermediate processing unit 13a corresponds to the first intermediate processing unit described in the claims, the maintenance monitoring unit 14a corresponds to the maintenance monitoring unit described in the claims, and the second intermediate processing unit 15a described in the claims. This corresponds to the second intermediate processing unit.

  The first intermediate processing unit 13a performs maintenance monitoring data of the wireless device 10a acquired via the high speed interface unit 11a and maintenance monitoring of other wireless devices (including the wireless device 10b) acquired via the low speed interface unit 16a. Data is multiplexed and intermediate maintenance monitoring data is generated. The maintenance monitoring unit 14a terminates the intermediate maintenance monitoring data generated by the first intermediate processing unit 13a, and further multiplexes maintenance monitoring data of other processing units in the wireless device 10a to generate final maintenance monitoring data. . The second intermediate processing unit 15a transmits the final maintenance monitoring data generated by the maintenance monitoring unit 14a to the wireless device 10b via the low speed interface unit 16a. Further, the second intermediate processing unit 15a sends the final maintenance monitoring data generated by the maintenance monitoring unit 14a to the processing unit that performs multiplexing in order to transmit the data to the radio network controller 20 via the high-speed interface unit 11a.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are preferred embodiments of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

  FIG. 2 is a block diagram showing an internal configuration of the radio apparatus according to the embodiment of the present invention. In the present embodiment, a remotely installed wireless device installed away from the wireless control device is connected to the wireless control device to constitute a wireless communication system. In FIG. 2, the wireless control device is omitted, but it is connected to the wireless control device via an INF (high-speed interface unit) as shown in FIG. The wireless device 1 according to the present embodiment includes INFs 21a and 21b, Local INF6, DEMUX / MUX3d, MUX / DEMUX3u, C-MUX4d and 4u, RFU5r, SV Unit5s, and Other Unit5t.

  The INF 21a is an interface unit for transmitting and receiving a high-speed signal to and from a wireless control device (not shown) that monitors and controls the wireless device 1, and is an input terminal for a high-speed data signal configured such as an optical multiplexed signal. The INF 21b is an interface unit for transmitting / receiving high-speed signals to / from other wireless devices. The INFs 21a and 21b correspond to the high-speed interface unit 11a in FIG. The Local INF 6 is an interface unit for transmitting / receiving a low-speed signal to / from another wireless device installed nearby, and corresponds to the low-speed interface unit 16a of FIG. The EX Unit 7 is an external device that is installed near the wireless device 1 and issues a maintenance monitoring signal such as an alarm.

  The DEMUX / MUX 3d multiplexes the signal received via the INF 21a into high-speed downlink user data (Ud) and low-speed downlink maintenance monitoring data (Cd) and reconstructs a transmission signal to another radio apparatus. It is a processing unit. The MUX / DEMUX 3u multiplexes the high-speed uplink user data (Uu) and the low-speed uplink maintenance monitoring data (Cu) into the uplink data received from another radio apparatus via the INF 21b, and a radio control apparatus (not shown) It is a multiprocessing part which reconstructs the transmission signal to.

  The C-MUX 4d is a low-speed signal downlink multiplex processing unit that multiplexes the downlink maintenance monitoring data (Cd) from the DEMUX / MUX 3d and the downlink maintenance monitoring data (Cd2) from the Local INF 6 to generate low-speed data (Cd1). is there. The C-MUX 4u is a multiplex processing unit that copies and transmits the multiplexed low-speed data (Cd1) and the data (Cu1) multiplexed with the maintenance monitoring signal in the wireless device 1 to the multiplex processing unit 3u and the local interface unit 6. C-MUX 4d corresponds to the first intermediate processing unit in FIG. 1, and C-MUX 4u corresponds to the second intermediate processing unit in FIG.

  The SV Unit 5s includes a maintenance monitoring signal of the wireless device 1 (for example, an alarm signal of an RFU (wireless unit) 5r included in the wireless device 1, an Other Unit (other unit) 5t included in the wireless device 1), and the multiplexed data (Cu1). , An alarm signal of an EX unit (external device) 7 installed outside the wireless device 1) and the like.

  In this manner, in this embodiment, the wireless device 1 multiplexes the C-MUX 4d that multiplexes the maintenance monitoring data of the wireless device with the downlink maintenance monitoring data (Cd) and the MUX / DEMUX 3u as the uplink maintenance monitoring data (Cu). And a C-MUX 4 u that distributes low-speed signals before conversion to other wireless devices via the Local INF 6. This allows the low-speed data signal interface that has not been multiplexed to the high-speed signal to be transmitted / received at the low-speed stage before multiplexing to the high-speed signal. It is possible to provide transfer to the wireless control apparatus flexibly and inexpensively.

  Next, with reference to FIGS. 4 and 5, the operation performed by the wireless device in the present embodiment will be described in more detail. 4 and 5 are diagrams for explaining data multiplexing processing of the wireless device according to the present embodiment. FIG. 4A shows a block diagram of the internal configuration of the wireless device, and FIG. 5B shows data multiplexing processing. .

  A signal input from the INF 21a that exchanges high-speed signals between the wireless device and the wireless control device is input to the DEMUX / MUX 3d. The DEMUX / MUX 3d receives the downlink user data (Ud) assigned to the wireless device and the low-speed downlink maintenance monitoring data (C & M signal or signal area for control and management) from the high-speed signal specified in the CPRI interface format. The vendor specific area (Vender Specific area) (Cd) is separated and transferred to the processing unit inside the wireless device. The separated downlink maintenance monitoring data (Cd) is sent to the C-MUX 4d.

  In the CPRI signal, a C & M signal is defined as a signal area for control and management. This signal is an area used for transmission / reception of a maintenance monitoring signal of the connected wireless device. As shown in FIG. 4B, the DEMUX / MUX 3d extracts only the C & M signal specific to the wireless device (RE1 of the data series Cd) and sends it to the C-MUX 4d. Then, a header indicating information unique to the wireless device is added to the C & M signal information / data area (denoted as D1, D2, and D3 in the figure), and the data series Cd1 is configured.

On the other hand, the C-MUX 4d multiplexes the signal acquired via the Local INF6, which is a newly provided low-speed signal interface unit. A signal input from the Local INF 6 is a data series Cd2 input from another wireless device, and a plurality of maintenance monitoring information similar to Cd1 is mounted. The data series Cd2 is information obtained by serializing maintenance monitoring information of a plurality of wireless devices, and has a data area for the connected wireless devices. The C-MUX 4d multiplexes the two data series Cd1 and Cd2 described above according to a predetermined format. In this example, the data series are shown as RE1, RE2,. The maintenance monitoring data extracted from the DEMUX / MUX 3d is multiplexed with maintenance monitoring information of other wireless devices input via the Local INF 6, and then transmitted to the SV Unit 5s.

  Next, the process of SV Unit 5s will be described with reference to FIG. The SV Unit 5s terminates the signal of the maintenance monitoring signal / data series Cd1 sent from the wireless control device, and other units in the wireless device (for example, the RFU 5r and Other Unit 5t that process transmission / reception of a wireless signal, or wireless) Maintenance monitoring information from EX Unit 7) input from the outside of the device is terminated, and maintenance monitoring information of the wireless device is newly generated and output to C-MUX 4u as data series Cu1. The data series Cu1 may be matched with the format of the data series Cd1 in consideration of data frame compatibility.

  The C-MUX 4u has a function of copying the data series Cu1 and outputting the same data as the signal (data series Cu) to the MUX / DEMUX 3u to the Local INF6. The data sent to the MUX / DEMUX 3u is subjected to multiprocessing on the CPRI signal in the MUX / DEMUX 3u and transmitted to the radio control apparatus. The data series Cu sent from the C-MUX 4u and multiplexed by the MUX / DEMUX 3u has a maintenance monitoring signal for a plurality of wireless devices obtained via the Local INF6, and depends on the chain configuration of the wireless devices (high speed The maintenance monitoring information of all the wireless devices can be acquired without acquiring the maintenance monitoring information via the interface INF).

  The data series exchanged via the Local INF 6 is low-speed maintenance monitoring data multiplexed on the CPRI signal, but signal termination is not performed in a high-speed signal transmission format corresponding to user data transmission defined by the CPRI. May be. In this case, data can be transferred using a relatively low-speed interface, and the hardware configuration can be simplified and reduced in cost.

  In addition, since it has a frame format corresponding to the number of wireless devices to be connected, it reads / writes only the data of the part of the data series designated in advance, so that the signal of the other wireless device is not lost without damaging the information. Can give and receive. At the time of signal transmission / reception, a wireless device to be a master among a plurality of wireless devices is set, and the master wireless device outputs the first frame format and performs final termination. The master wireless device is preferably a CPRI line wireless device intended to terminate (only) maintenance monitoring information of an external device from a plurality of CPRI lines connecting the wireless control device and the wireless device. The CPRI line is a connection line in which both devices are connected by a high speed line such as an optical fiber using CPRI for an interface unit.

  In order to efficiently demultiplex and multiplex maintenance monitoring signals when DEMUX / MUX 3d and MUX / DEMUX 3u are chained, it is necessary to configure a relatively simple demultiplexing / multiplexing format. That is, as in this embodiment, a method of processing by adding only header information unique to the wireless device to the maintenance monitoring information of the CPRI signal is preferable. The transmission rate needs to be a transmission rate that can be transmitted by adding the header to the transmission rate of the maintenance monitoring information of the CPRI signal and the number of wireless devices that are supposed to be connected.

As another embodiment, FIG. 3 shows a system configuration diagram in which there are a plurality of wireless devices, each of which is connected to a wireless control device by a CPRI line, and wireless devices are connected to each other by a low-speed interface. 2 is one in which one radio apparatus is connected to one radio control apparatus, whereas the system in FIG. 3 is one in which a plurality of radio apparatuses are connected to one radio control apparatus ( (The radio controller is a high-speed interface, and radio devices are low-speed interfaces.) The transmission medium for connecting the low-speed interfaces (Local INF) may be wired communication, infrared or low-power microwave lines may be used for line-of-sight distances. Since it is not directly related to the invention, description and illustration are omitted. The communication method is preferably a time-division communication method in which the frame format used as a master by the reference wireless device is increased, but by increasing the transmission rate, ATM transmission, IP transmission, CAN communication (CONTROLLER AREA NETWORK: CAN bus communication) ) Etc. may be used, but the description and illustration are omitted because they are not directly related to the present invention.

  In the problem to be solved by the invention, in order to indicate the necessity of connecting between wireless devices, a case where an abnormality has occurred in a wireless device connected to a faulty CPRI link has been described. The same is true for external devices. Since the external device is a device attached to the station where the wireless device is installed, the external device is often connected only to an arbitrary wireless device among the centrally installed wireless devices. For example, as in the system shown in FIG. 7, the EX unit 7 is connected only to an arbitrary wireless device 11. In the system of FIG. 7, the maintenance monitoring information of EX Unit 7 is transferred to the wireless control device 8 via CPRI 1. However, if a failure occurs in CPRI 1, the wireless control device 8 cannot acquire the maintenance monitoring information of EX Unit 7. . That is, when the EX unit 7 fails during the occurrence of the failure of the CPRI 1, the wireless control device 8 cannot grasp the failure of the EX unit 7.

In the present embodiment, as shown in FIG. 3, the wireless devices are connected to each other through a low-speed interface (Local
.., 6n), and maintenance monitoring information of EX Unit 7 is multiplexed and transmitted together with maintenance monitoring information of other wireless devices. Therefore, even if a failure occurs in the CPRI link (CPRI1) between the wireless device 11 to which the EX unit 7 is connected and the wireless control device 8, maintenance monitoring information of the EX unit 7 connected only to the wireless device 11 is stored. It can be acquired from other CPRI links.

  The above-described first effect of the present embodiment is that a wireless device having a CPRI chain connection function has a low-speed and inexpensive interface, so that maintenance monitoring is performed between wireless devices without using an expensive interface module. It is possible to exchange information.

  Further, although the second effect of the present embodiment described above has a low-speed and low-cost interface, since this interface is an interface that conforms to the CPRI maintenance monitoring signal, the development assets of the CPRI chain configuration are effectively saved. It can be diverted.

  Further, the third effect of the present embodiment described above is to send and receive maintenance monitoring information of all of a plurality of wireless devices using a low-speed and inexpensive interface. Maintenance monitoring information can be acquired from different CPRI links.

  The above-described embodiment is a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above-described embodiment alone, and various modifications are made without departing from the gist of the present invention. Implementation is possible.

1,11-1n, 110-11n RE (wireless device)
3d DEMUX / MUX (Multiple Processing Unit)
3u MUX / DEMUX (Multiple Processing Unit)
4d, 4u C-MUX (Multiple Processing Unit)
5r RFU (wireless unit)
5s SV Unit (monitoring unit)
5t Other Unit (other units)
6,61-6n Local INF (local interface part)
7, 71, 72 EX Unit (external device)
8 REC (Radio Control Equipment)
10a, 10b Wireless devices 11a, 11b High-speed interface units 12a, 12b Intermediate multiple processing units 13a, 13b First intermediate processing units 14a, 14b Maintenance monitoring units 15a, 15b Second intermediate processing units 16a, 16b Low-speed interface units 20 Wireless control devices 21a, 21b INF (CPRI interface part)

Claims (12)

A wireless communication system comprising a wireless device and a wireless control device that monitors and controls the wireless device,
The wireless device includes:
A high-speed interface unit for data communication by connecting to a high-speed line;
A low-speed interface unit for data communication by connecting to a low-speed line;
An intermediate multiplex processing unit for multiplexing data acquired through the low-speed interface unit;
With
Send and receive wireless device maintenance monitoring data to and from other wireless devices via the low-speed interface unit,
The maintenance monitoring data received via the low-speed interface unit is multiplexed by the intermediate multiplex processing unit,
A radio communication system, wherein the multiplexed maintenance monitoring data is transmitted to the radio control apparatus via the high-speed interface unit with the radio control apparatus.   The intermediate multiplexing processing unit multiplexes the maintenance monitoring data of the own device acquired from the wireless control device via the high speed interface unit and the maintenance monitoring data of another wireless device received via the low speed interface unit. Intermediate maintenance monitoring data is generated, and final maintenance monitoring data that is further multiplexed and newly generated using the intermediate maintenance monitoring data is transmitted to another wireless device via the low-speed interface unit. The wireless communication system according to claim 1.   The intermediate multiplexing processing unit multiplexes the maintenance monitoring data of the own device acquired from the wireless control device via the high speed interface unit and the maintenance monitoring data of another wireless device received via the low speed interface unit. The wireless communication system according to claim 1, further comprising a first intermediate processing unit configured to generate intermediate maintenance monitoring data.   The intermediate multiplexing processing unit multiplexes the maintenance monitoring data of its own device acquired from the wireless control device via the high speed interface unit and the maintenance monitoring data of another wireless device received via the low speed interface unit. A maintenance monitoring unit that terminates the generated intermediate maintenance monitoring data, and further multiplexes the maintenance monitoring data of other processing units in the device itself with the data to generate final maintenance monitoring data. The wireless communication system according to any one of claims 1 to 3.   The intermediate multiplex processing unit includes maintenance monitoring data of its own device acquired from the wireless control device via the high speed interface unit, maintenance monitoring data of another wireless device received via the low speed interface unit, 5. The final maintenance monitoring data generated by multiplexing maintenance monitoring data of other processing units in the system is transmitted to another wireless device via the low-speed interface unit. 6. The wireless communication system according to item 1. A wireless device that constitutes a wireless communication system together with a wireless control device that performs monitoring control,
A high-speed interface unit for data communication by connecting to a high-speed line;
A low-speed interface unit for data communication by connecting to a low-speed line;
An intermediate multiplex processing unit for multiplexing data acquired via the low-speed interface unit;
With
Send / receive maintenance monitoring data of the wireless device to / from other wireless devices via the low-speed interface unit,
The maintenance monitoring data received via the low speed interface unit is multiplexed by the intermediate multiplex processing unit,
A wireless device, wherein the multiplexed maintenance monitoring data is transmitted to the wireless control device via the high-speed interface unit with the wireless control device.   The intermediate multiplexing processing unit multiplexes the maintenance monitoring data of the own device acquired from the wireless control device via the high speed interface unit and the maintenance monitoring data of another wireless device received via the low speed interface unit. Intermediate maintenance monitoring data is generated, and final maintenance monitoring data that is further multiplexed and newly generated using the intermediate maintenance monitoring data is transmitted to another wireless device via the low-speed interface unit. The wireless device according to claim 6.   The intermediate multiplexing processing unit multiplexes the maintenance monitoring data of the own device acquired from the wireless control device via the high speed interface unit and the maintenance monitoring data of another wireless device received via the low speed interface unit. The wireless device according to claim 6, further comprising a first intermediate processing unit that generates intermediate maintenance monitoring data.   The intermediate multiplexing processing unit multiplexes the maintenance monitoring data of its own device acquired from the wireless control device via the high speed interface unit and the maintenance monitoring data of another wireless device received via the low speed interface unit. A maintenance monitoring unit that terminates the generated intermediate maintenance monitoring data, and further multiplexes the maintenance monitoring data of other processing units in the device itself with the data to generate final maintenance monitoring data. The wireless device according to any one of claims 6 to 8.   The intermediate multiplex processing unit includes maintenance monitoring data of its own device acquired from the wireless control device via the high speed interface unit, maintenance monitoring data of another wireless device received via the low speed interface unit, 10. The final maintenance monitoring data generated by multiplexing maintenance monitoring data of other processing units in the system is transmitted to another wireless device via the low-speed interface unit. The wireless device according to item 1. A maintenance monitoring method in a wireless communication system comprising a wireless device and a wireless control device that monitors and controls the wireless device,
The wireless device includes a high-speed interface unit for performing data communication by connecting to a high-speed line, and a low-speed interface unit for performing data communication by connecting to a low-speed line,
In the wireless device,
Receiving maintenance monitoring data of the wireless device from the wireless control device via the high-speed interface, and acquiring maintenance monitoring data of the own device; and
Receiving maintenance monitoring data of the device from another wireless device via the low-speed interface unit;
Multiplexing the acquired maintenance monitoring data of the own device and the received maintenance monitoring data of the other wireless device;
Transmitting the multiplexed and generated maintenance monitoring data to another wireless device via the low-speed interface unit;
Transmitting the multiplexed and generated maintenance monitoring data to the wireless control device via the high-speed interface unit;
A maintenance monitoring method characterized by comprising: The multiplexing step multiplexes the maintenance monitoring data of the own device acquired from the wireless control device via the high speed interface unit and the maintenance monitoring data of another wireless device received via the low speed interface unit. Intermediate maintenance monitoring data is generated, and final maintenance monitoring data that is further multiplexed and newly generated using the intermediate maintenance monitoring data is transmitted to another wireless device via the low-speed interface unit. The maintenance monitoring method according to claim 11.

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