JP2013162210A - Radio communication system and its control method, radio device and its control method, and control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize control of a radio control device by making maintenance monitoring information accord if a plurality of radio devices monitor the same maintenance monitoring information.SOLUTION: A radio communication system includes a plurality of radio devices and a radio control device for controlling the plurality of radio devices. The radio communication system is characterized by comprising: a maintenance monitoring information transmission unit for transmitting maintenance monitoring information received by the plurality of radio devices to the radio control device; and a maintenance monitoring information control unit for controlling such that the radio control device obtains the maintenance monitoring information received by the plurality of radio devices from the same transmission source as the same information.

Description

  The present invention relates to a wireless communication technique using a wireless communication system including a wireless device and a wireless control device.

  In the above technical field, Patent Document 1 discloses a technique for notifying the wireless control device of maintenance monitoring information of each wireless device in a wireless communication system having a plurality of wireless devices and a wireless control device that controls the wireless devices. ing.

JP 2010-171739 A

  However, in the technique described in the above document, in a wireless communication system configured such that a plurality of wireless devices monitor the same maintenance monitoring information, the maintenance monitoring information does not match due to timing shifts, noise, and the like. There was a confusion in the control.

  The objective of this invention is providing the technique which solves the above-mentioned subject.

In order to achieve the above object, a system according to the present invention provides:
A wireless communication system having a plurality of wireless devices and a wireless control device that controls the plurality of wireless devices,
Maintenance monitoring information transmitting means for transmitting maintenance monitoring information received by the plurality of wireless devices to the wireless control device;
Maintenance monitoring information control means for controlling the wireless control device to acquire maintenance monitoring information received by the plurality of wireless devices from the same transmission source as the same information;
It is characterized by providing.

In order to achieve the above object, the method according to the present invention comprises:
A control method of a radio communication system having a plurality of radio devices and a radio control device for controlling the plurality of radio devices,
Maintenance monitoring information transmission step of transmitting maintenance monitoring information received by the plurality of wireless devices to the wireless control device;
Maintenance monitoring information control step for controlling maintenance monitoring information received by the plurality of wireless devices from the same transmission source as the same information; and
It is characterized by including.

In order to achieve the above object, an apparatus according to the present invention provides:
A wireless device in a wireless communication system having a plurality of wireless devices and a wireless control device that controls the plurality of wireless devices,
Master right storage means for storing whether or not a master right is set in the wireless device;
Maintenance monitoring information storage means for storing maintenance monitoring information received by the plurality of wireless devices;
Maintenance monitoring information correction means for correcting the maintenance monitoring information storage means to match different maintenance monitoring information to the maintenance monitoring information received by the wireless device when a master right is set in the master right storage means;
It is characterized by providing.

In order to achieve the above object, the method according to the present invention comprises:
A master right storage means for storing in a radio communication system having a plurality of radio apparatuses and a radio control apparatus for controlling the plurality of radio apparatuses, whether or not a master right is set for the radio apparatus. A method of controlling a wireless device comprising:
Maintenance monitoring information storage step for storing maintenance monitoring information received by the plurality of wireless devices in maintenance monitoring information storage means;
A maintenance monitoring information correction step of correcting the maintenance monitoring information storage unit so that different maintenance monitoring information matches the maintenance monitoring information received by the wireless device when the master right is set in the master right storage unit; It is characterized by that.

In order to achieve the above object, a program according to the present invention provides:
A master right storage means for storing in a radio communication system having a plurality of radio apparatuses and a radio control apparatus for controlling the plurality of radio apparatuses, whether or not a master right is set for the radio apparatus. A wireless device control program comprising:
Maintenance monitoring information storage step for storing maintenance monitoring information received by the plurality of wireless devices in maintenance monitoring information storage means;
A maintenance monitoring information correction step for correcting the maintenance monitoring information storage means so that different maintenance monitoring information matches the maintenance monitoring information received by the wireless device when the master right is set in the master right storage means. It is made to perform.

  According to the present invention, even when a plurality of wireless devices monitor the same maintenance monitoring information, the maintenance monitoring information can be matched to stabilize the control of the wireless control device.

It is a block diagram which shows the structure of the radio | wireless communications system which concerns on 1st Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communications system which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless apparatus (RE) which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the maintenance monitoring information table which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the radio | wireless apparatus (RE) which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the radio | wireless communication apparatus (REC) which concerns on 2nd Embodiment of this invention. It is a figure explaining the information communication by the CPRI standard in the radio | wireless communications system which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the CPRI protocol stack in the radio | wireless communications system which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communications system which concerns on 3rd Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless control apparatus (REC) which concerns on 3rd Embodiment of this invention. It is a flowchart which shows the process sequence of the radio | wireless control apparatus (REC) which concerns on 3rd Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communications system which concerns on 4th Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless control apparatus (REC) which concerns on 4th Embodiment of this invention. It is a flowchart which shows the process sequence of the radio | wireless control apparatus (REC) which concerns on 4th Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communications system which concerns on 5th Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communications system which concerns on 6th Embodiment of this invention.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the constituent elements described in the following embodiments are merely examples, and are not intended to limit the technical scope of the present invention only to them.

[First Embodiment]
A radio communication system 100 as a first embodiment of the present invention will be described with reference to FIG. The wireless communication system 100 is a system that includes a plurality of wireless devices 111 to 11n and a wireless control device 120 that controls the plurality of wireless devices 111 to 11n.

  As shown in FIG. 1, the wireless communication system 100 includes a maintenance monitoring information transmission unit 101 and a maintenance monitoring information control unit 102. The maintenance monitoring information transmitting unit 101 transmits the maintenance monitoring information received by the plurality of wireless devices 111 to 11n to the wireless control device 120. The maintenance monitoring information control unit 102 controls the wireless control device 120 to acquire maintenance monitoring information received by the plurality of wireless devices 111 to 11n from the same transmission source as the same information.

  According to this embodiment, even when a plurality of wireless devices monitor the same maintenance monitoring information, the maintenance monitoring information can be matched to stabilize the control of the wireless control device.

[Second Embodiment]
Next, a radio communication system according to the second embodiment of the present invention will be described. In the wireless communication system according to the present embodiment, a plurality of wireless devices (RE: Radio Equipment) and a wireless control device (REC: Radio Equipment Controller) are connected by information communication according to the CPRI (Common Public Radio Interface) standard. It is a system that operates as a base station (DRBS: Digitized Radio Base Station) that controls a mobile station (UE: User Equipment). In this embodiment, REs are connected in cascade, and maintenance monitoring information of common external devices is collected, transferred sequentially, and notified to the REC. In that case, the master right is set in one of the REs, and the maintenance monitoring information acquired by the RE set with the master right is sent to the REC as information from the external device. Therefore, the maintenance monitoring information different from the maintenance monitoring information acquired by the RE set with the master right is corrected to the maintenance monitoring information acquired by the RE set with the master right.

  According to the present embodiment, it is possible to eliminate REC confusion due to different maintenance monitoring information being notified to the REC from the same external device. That is, in the information detected on the host device side, the maintenance monitoring information of the RE device configured in the same sector does not differ between the REs, and the operation of the host device is not confused. Operation can be continued.

<< Configuration of wireless communication system >>
FIG. 2 is a block diagram illustrating a configuration of the wireless communication system 200 according to the present embodiment.

  In recent years, a base station system such as a mobile phone is composed of an RE that processes a radio signal and a REC that controls the RE, and the CPRI standard has been adopted as an interface connecting the REC-RE (http: / /www.cpri.info/jp/index.html). The wireless communication system 200 of FIG. 2 has a configuration conforming to the CPRI standard, and a plurality of REs 211 to 21n and a REC 220 connected to and controlled by the plurality of REs 211 to 21n are connected.

  The REC 220 is connected to the RE 211 via an optical cable 241 that is a CPRI transmission line 230. The RE 211 corresponds to a terminal device such as an antenna (not shown) and performs transmission / reception with a terminal such as a mobile phone. In a base station system having a large zone configuration, in order to increase the number of users that can be present in an area, a sector configuration is often used in which directions are divided by a plurality of antennas at the same location. In FIG. 2, the fact that a plurality of sectors (corresponding to each RE) existing in the same area are connected is schematically shown by an nth RE21n block starting from RE211.

  Each of REs 211 to 21n has a monitoring control line of external device 201 used for maintenance or the like in an environment where the RE group is installed (for example, an indoor machine room or a storage room of a wireless device such as an outdoor cubicle). Have been introduced. As shown in FIG. 2, the plurality of REs 211 to 21n are connected in cascade by optical cables 242, 243,..., 24n as interfaces compliant with the CPRI standard. The optical cables 242, 243,..., 24n transmit and receive wireless signals and transmit maintenance monitoring information of external devices to the REC 220. Hereinafter, in the tandem connection in FIG. 2, the RE 211 side closer to the REC 220 is referred to as an upstream RE, and the RE 21n side far from the REC 220 is referred to as a downstream RE.

  In the present embodiment, in the notification of the maintenance monitoring information from the downstream RE to the upstream RE, if there is maintenance monitoring information that is different from the maintenance monitoring information detected by the RE having the master right, modify this. Transfer to CPRI. Data correction is performed when the master right is granted. In FIG. 2, it is assumed that the master right 212a is set in the RE 212. Note that the master right setting may be fixedly set in advance when the DRBS is configured, or may be dynamically set by the REC 220. When the upstream side of the CPRI connection (RE211 in FIG. 2) is a slave, the control unit of the RE211 performs data correction on the basis of the maintenance monitoring information part of the RE212 designated by the master, and further transfers it upstream. In FIG. 2, the RE 211 has no upstream RE, and is transferred to the REC 220.

  The master information is transmitted by the Control & Management Plane of the corresponding CPRI signal, and the master right is given to the corresponding RE. Granting of the master right is normally specified and managed on the REC 220 side, but can be autonomously switched on the RE side depending on the operating state of the RE. The result is transferred to the REC side by Control & Management Plane and the information is updated. Since the master information is expanded in the cascaded CPRI frame, the master information can be grasped also in other REs, and it can be recognized that it is in the slave state.

  The REC 220 is connected to an RNC (Radio Network Controller), which is a higher-level device, together with other RECs, and is controlled by the RNC.

<< Configuration of Radio Equipment (RE) >>
FIG. 3 is a block diagram showing the configuration of the radio apparatus (RE) 212 according to this embodiment. In FIG. 3, the RE 212 to which the master right is set in FIG. 2 will be described as a representative. Other REs have the same configuration. However, the connection destination of the conversion unit 330 of the most upstream RE 211 is not the upstream RE but the REC 220.

  The RE 212 includes a conversion unit 330 that decodes the downstream signal from the REC 220 and inputs the downstream signal to the RE 212 and also codes the upstream signal toward the REC 220 and outputs the upstream signal to the RE 211. In addition, it includes a conversion unit 340 that codes a downlink signal in the REn direction and outputs the coded signal to the RE 213, and decodes an uplink signal from the RE 213 and inputs the decoded signal to the RE 212.

  Information obtained as a result of decoding is processed by a control unit 310 having a processing device such as a CPU or DSP capable of performing a software control operation, and some of the user data used for wireless transmission / reception (not shown) is processed. It is stored in the memory unit 320 as monitoring information or the like. Maintenance monitoring information obtained from the external device 201 connected to the RE 212 is stored in the maintenance monitoring information table 322 that is a maintenance monitoring information storage unit of the memory unit 320 via the control unit 310 (see FIG. 4A). In addition, the memory unit 320 holds a master right flag 321 that indicates whether or not the RE 212 is granted the master right as a master right storage unit in a rewritable manner.

  The processing information of user data for wireless transmission / reception and the obtained maintenance monitoring information are recoded by the control unit 310, the conversion unit 330, and the conversion unit 340 based on the information in the memory unit 320. Then, the upstream signal is transmitted to the upstream RE 211 via the optical cable 242 which is a CPRI transmission path again. On the other hand, the downstream signal is transmitted to the downstream RE 213 via the optical cable 243, which is again a CPRI transmission path. That is, the CPRI transmission line performs bidirectional signal transmission.

  The maintenance monitoring information of the external device 201 processed in the present embodiment is an upstream signal from the most downstream RE 21n to the most upstream RE 211. Then, the most upstream RE 211 notifies the REC 220 of the maintenance monitoring information through the maintenance monitoring information table 322.

(Maintenance monitoring information table)
FIG. 4A is a diagram showing a configuration of the maintenance monitoring information table 322 according to the present embodiment.

  The maintenance monitoring information table 322 corresponds to each RE of a plurality of REs to be connected, an address area 401 for storing maintenance monitoring information, and a time of primary reception that is data of maintenance monitoring information directly received by each RE from the external device 201. Address area data 402 is stored. Further, the maintenance monitoring information table 322 reads the address area data 402 and compares the data of the master authority RE with the data read / determination result 403 for determining coincidence / difference, and data correction based on the read / determination result 403 Necessity 404 is stored. Then, the maintenance monitoring information table 322 stores address area data 405 of correction error corrected in accordance with the data correction necessity 404. The maintenance monitoring information 410 detected by the RE 211, the maintenance monitoring information 420 detected by the RE 212, and the maintenance monitoring information 430 detected by the RE 21n, respectively.

  As shown in FIG. 2, the information from the downstream RE decoded by the converting unit 340 is mapped in the memory for each signal assigned to the memory area. Here, when the information from the external device 201 is updated, the information in the same memory area is updated, recoded, and transmitted to the upstream RE or REC through the CPRI transmission path.

  In FIG. 4A, an example of the result of expanding the decoded maintenance monitoring information into the maintenance monitoring information table 322 of the memory unit 320 is shown in the address area data 402 at the time of primary reception. In the detection result, the detection value in the RE 212 having the master right is “1”, whereas the detection value from the RE 211 stored in 0x01000 in the memory area is “0”. In this case, as a detection value when a plurality of REs are cascaded and there is only one external device 201, it is considered that the detection value is an abnormal value or a false detection. The upstream RE control unit 310 having the master right corrects the data and updates the memory. The updated data after correction is shown in address area data 405. The control unit 310 of the upstream RE that does not have the master right corrects the data detected by itself to the data of the RE that has the downstream master right.

<< Processing Procedure of Radio Equipment (RE) >>
FIG. 4B is a flowchart showing a processing procedure of the radio apparatus (RE) 212 according to the present embodiment. This flowchart is executed by the control unit 310 in FIG. 3 using the memory unit 320 according to a program, and implements each component function unit in FIG. 3.

  First, in step S411, it is determined whether or not a master right setting is instructed. In step S421, it is determined whether or not cancellation of the master right is set. In step S431, it is determined whether maintenance monitoring information has been received from the external device 201. In step S441, it is determined whether the maintenance monitoring information table 322 is received from the downstream RE.

  If the master right is set, the process proceeds to step S413, and the master right flag 321 of the memory unit 320 is turned ON. If the master right is released, the process proceeds to step S423, and the master right flag 321 of the memory unit 320 is turned OFF.

  If the maintenance monitoring information is received from the external device 201, the process proceeds to step S433, and the received maintenance monitoring information is written in the address area assigned to the own apparatus in the maintenance monitoring information table 322 as shown in FIG. 4A. If the maintenance monitoring information table 322 is received from the downstream RE, the process advances to step S443 to determine whether the own apparatus has the master right. If the user has the master right, in step S445, the maintenance monitoring information is corrected to the same information as the information different from the maintenance monitoring information of the own device area (see FIG. 4A). On the other hand, if there is no master right, no correction is made. However, although not shown, the upstream RE when the RE having the downstream master right is connected corrects the information of its own device to match the information of the RE having the downstream master right. In step S447, the maintenance monitoring information table is transmitted to the upstream RE or REC.

<< Processing Procedure of Radio Control Unit (REC) >>
FIG. 4C is a flowchart showing a processing procedure of the radio communication apparatus (REC) according to the second embodiment of the present invention. This flowchart is executed by the CPU of the REC 220 using the RAM.

  First, in step S451, it is determined whether or not the process is related to granting of the master right to the RE. In step S461, it is determined whether the maintenance monitoring information table 322 is acquired from the most upstream RE.

  If the processing is related to granting of the master right to the RE, the process proceeds to step S453, where processing such as setting, canceling, or changing the master right to the predetermined RE is performed. If the maintenance monitoring information table 322 is acquired, the process advances to step S463 to acquire the maintenance monitoring information already unified by the RE from the maintenance monitoring information table 322.

  In the present embodiment, a plurality of pieces of maintenance monitoring information acquired by a plurality of REs as the maintenance monitoring information table 322 are passed to the REC 220. However, while the maintenance monitoring information is being transmitted between the REs, the RE having the master right is transferred. Only maintenance monitoring information may be passed to the REC 220.

<< CPRI >>
FIG. 5 is a diagram for explaining information communication of DRBS connected according to the CPRI standard in the wireless communication system according to the present embodiment.

  An internal interface that connects the REs 211 to 21n and the REC 220 is a CPRI link. Details of its structure and operation are described in the CPRI Specification. REC and RE may be physically separated. For example, the RE may be located near the antenna, while the REC may be located where access is convenient.

  As shown in FIG. 5, the REC provides access to the RNC (not shown) via the Iub interface. In the REC to RE link, the REC handles operations such as channel coding, interleaving, spreading, scrambling, adding physical channels, controlling the transmission power of each physical channel, and generating frame and slot signals. Conversely, in the link from the RE to the REC, the REC performs channel decoding, de-interleaving, de-spreading, de-scramble, signal distribution to the signal processing unit, detection of feedback information for transmission power control, and interference rate measurement. It works like a signal to.

  The RE communicates with mobile stations in the RE area via an air interface (Uu interface). REC includes digital baseband domain radio functions, while RE includes analog radio frequency functions. Functional sharing between the two is performed in such a way that a general interface can be defined based on in-phase and quadrature (IQ) data.

  In the specification, the communication protocol is defined by the physical layer (Layer 1) and the data link layer (Layer 2). Layer 1 defines, for example, electrical characteristics, optical characteristics, time division multiplexing of different data flows, low level signaling, and the like. Layer 2 defines media access control, flow control, and data protection for control and management information flows. Furthermore, a protocol data plane (Data Plane), that is, a control plane (Control Plane), a management plane (Management Plane), a user plane (User Plane), and synchronization (Sync) are described. The control and management plane (Control & Management Plane) is mapped to a single information flow on the CPRI link.

  FIG. 6 is a diagram showing the configuration of the CPRI protocol stack in the wireless communication system according to the present embodiment. Signal processing between REC-RE and RE-RE is performed according to this protocol.

  Control Plane includes a control data flow used for call processing. The Management Plane handles management information regarding the operation, management, and maintenance of the CPRI link and RE. Control & Managment data is exchanged between Control & Managment entities along with REC and RE and passed to higher protocol layers. User Plane relates to data transferred from a radio base station to a mobile station and vice versa. User Plane data is transferred in the form of in-phase and quadrature (IQ) modulation data, as shown in FIG. Several IQ Data flows are sent over the physical CPRI link. Sync relates to the data flow for transferring synchronization and timing information between REC and RE. The synchronization data is used not only for coder alignment but also for detection of chips, hyperframes, radio frame boundaries, associated frame numbers, and the like.

  L1 inband protocol is signal information related to the link, and is directly transported to Layer 1. This information is necessary, for example, for system startup, Layer 1 maintenance, and transfer of time critical information that is directly related to Layer 1 user data. Vendor Specific indicates vendor-specific information, that is, an information flow reserved for vendor-specific information. This vendor-specific information area usually has a free bandwidth of about 50 Mbps. All information flows are multiplexed onto the digital serial communication line using the appropriate Layer 1 and Layer 2 protocols. IQ data of different antenna carriers are multiplexed by time division multiplexing on an electrical or optical communication line forming an internal interface. Control & Management data is either transmitted as L1 inband protocol data or transmitted by a protocol that exists in the uppermost layer of the appropriate Layer 2 protocol. Two other Layer 2 protocols, High Data Level Link Control (HDLC) and Ethernet (Ithernet) are supported by CPRI. These supplementary Control & Managment data are time multiplexed with IQ Data. Additional time slots are available for transferring any type of vendor specific information.

  In the specifications shown in FIGS. 5 and 6, the maintenance monitoring information of the external device 201 is mainly transmitted by the protocol of Control & Managment Plane. The Vendor Specific area is an area that can be freely used by the system user, and can be transmitted using this area.

[Third Embodiment]
Next, a radio communication system according to the third embodiment of the present invention will be described. The wireless communication system according to the present embodiment is different from the second embodiment in that the maintenance control information is matched based on the master right in the wireless control device (REC). Since other configurations and operations are the same as those in the second embodiment, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.

  According to the present embodiment, it is possible to eliminate REC confusion due to maintenance monitoring information without increasing the processing load on the radio apparatus (RE).

<< Configuration of wireless communication system >>
FIG. 7 is a block diagram illustrating a configuration of the wireless communication system 700 according to the present embodiment. In FIG. 7, the same functional components as those in FIG. 2 of the second embodiment are denoted by the same reference numerals, and description thereof is omitted.

  In this embodiment, the REs 711 to 71n transfer the maintenance monitoring information table 722 from downstream to upstream. However, as in the second embodiment, processing is performed such that the maintenance monitoring information is matched to the RE having the master right. Absent.

  Processing for matching maintenance monitoring information from one external device 201 is performed by the REC 720 that has received the maintenance monitoring information table 722 from the RE 711. In this embodiment, the REC 720 holds which RE sets the master right 721, and corrects the information in the maintenance monitoring information table 722 to match the information of the RE having the master right.

  Note that the master right may be held by the RE, the information may be received, and the REC may perform maintenance monitoring information matching processing.

<< Configuration of Radio Control Unit (REC) >>
FIG. 8A is a block diagram illustrating a configuration of a radio network controller (REC) 720 according to the present embodiment.

  The REC 720 includes a conversion unit 830 that decodes the uplink signal from the RE 711 and inputs the decoded signal to the REC 720 and codes and outputs the downlink signal toward the RE 711. In addition, it has a conversion unit 840 for coding the uplink signal and outputting it to the RNC, and decoding the downlink signal from the RNC and inputting it to the REC 720.

  Information obtained as a result of decoding is processed by a control unit 810 having a processing device such as a CPU or DSP capable of performing a software control operation, and some of the user data used for wireless transmission / reception (not shown) is processed. It is stored in the memory unit 820 as monitoring information or the like. The maintenance monitoring information of the external device 201 received from the RE 711 is stored in the maintenance monitoring information table 722 of the memory unit 820 via the control unit 810. Further, the memory unit 820 holds a master right 721 indicating which RE is granted the master right in a rewritable manner.

  The maintenance monitoring information table 722 in FIG. 8A stores the presence / absence 822 of the master right and the maintenance monitoring information 823 of the external device 201 acquired by each RE in association with the RE 821. As described above, the maintenance monitoring information table 722 in FIG. 8A also holds the master right 721.

  Note that correction for matching other maintenance monitoring information with the maintenance monitoring information received by the RE having the master right is the same as in the second embodiment.

<< Processing Procedure of Radio Control Unit (REC) >>
FIG. 8B is a flowchart illustrating a processing procedure of the radio network controller (REC) according to the third embodiment. This flowchart is executed by the CPU configuring the control unit 810 of the REC 720 using the memory unit 820.

  First, in step S801, it is determined whether or not the maintenance monitoring information table 722 that has not been unified is received from the most upstream RE. If the maintenance monitoring information table 722 has been received, the process advances to step S803 to refer to the master authority 721 of a plurality of REs and use the maintenance monitoring information acquired by the RE having the master authority as information of the external device 201. .

[Fourth Embodiment]
Next, a radio communication system according to the fourth embodiment of the present invention is described. The wireless communication system according to the present embodiment is different from the third embodiment in that maintenance monitoring information is matched on the basis of a majority decision in a wireless control device (REC). Since other configurations and operations are the same as those of the third embodiment, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.

  According to the present embodiment, more reliable maintenance monitoring information can be acquired and the REC confusion caused by the maintenance monitoring information can be eliminated without increasing the processing load on the radio apparatus (RE).

<< Configuration of wireless communication system >>
FIG. 9 is a block diagram showing a configuration of a wireless communication system 900 according to the present embodiment. In FIG. 9, the same reference numerals are assigned to the same functional components as those in FIG. 2 of the second embodiment and FIG. 7 of the third embodiment, and the description thereof is omitted.

  In this embodiment, the REC 920 transfers the maintenance monitoring information table 922 from downstream to upstream as in the third embodiment. However, as in the second embodiment, the maintenance monitoring information is matched with the RE having the master right. Such processing is not performed.

  Processing for matching maintenance monitoring information from one external device 201 is performed by the REC 920 that has received the maintenance monitoring information table 922 from the RE 711. In the present embodiment, the REC 920 causes the majority monitoring unit 921 to match the maintenance monitoring information from the information in the maintenance monitoring information table 922.

  The majority decision unit 921 determines the maintenance monitoring information acquired by the largest number of REs among the entire REs as the maintenance monitoring information of the external device 201. The majority voting unit 921 may add each of the REs by weighting them considering their importance, instead of simply voting based on the number of REs. The weighting information may be held by each RE or REC.

<< Configuration of Radio Control Unit (REC) >>
FIG. 10A is a block diagram showing a configuration of a radio network controller (REC) 920 according to this embodiment. In FIG. 10A, the same components as those in FIG. 8A of the third embodiment are denoted by the same reference numerals, and description thereof is omitted. The REC 920 includes a conversion unit 830 and a conversion unit 840 as in FIG. 8A.

  Information obtained as a result of decoding is processed by a control unit 1010 having a processing device such as a CPU or DSP capable of performing a software control operation, and some of the information is processed by user data used for wireless transmission / reception (not shown). It is stored in the memory 10820 as monitoring information or the like. The maintenance monitoring information of the external device 201 received from the RE 711 is stored in the maintenance monitoring information table 922 of the memory unit 1020 via the control unit 1010. In addition, the memory unit 1020 holds a majority decision unit 921 that performs majority decision.

  The maintenance monitoring information table 922 in FIG. 10A stores the maintenance monitoring information 1022 of the external device 201 acquired by each RE and the majority decision result 1023 in association with the RE 1021. As described above, the maintenance monitoring information table 922 in FIG. 10A also serves as the majority decision unit 921.

<< Processing Procedure of Radio Control Unit (REC) >>
FIG. 10B is a flowchart collectively showing a processing procedure of the radio network controller (REC) according to the third embodiment. This flowchart is executed by the CPU configuring the control unit 1010 of the REC 920 using the memory unit 1020.

  First, in step S1001, it is determined whether or not the maintenance monitoring information table 922 that has not been subjected to the unifying process has been received from the most upstream RE. If the maintenance monitoring information table 922 is received, the process proceeds to step S1003, and the maintenance monitoring information held in the maintenance monitoring information table 922 is determined as one maintenance monitoring information according to the majority.

[Fifth Embodiment]
Next, a radio communication system according to the fifth embodiment of the present invention is described. The wireless communication system according to the present embodiment is different from the second to fourth embodiments in that a plurality of wireless devices (RE) and a wireless control device (REC) are connected in parallel. Since other configurations and operations are the same as those in the above embodiment, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.

  According to this embodiment, it is possible to eliminate a delay in notification of maintenance monitoring information between different wireless devices (REs), and to eliminate REC confusion due to maintenance monitoring information.

<< Configuration of wireless communication system >>
FIG. 11 is a block diagram showing a configuration of a wireless communication system 1100 according to this embodiment. In FIG. 11, the same components as those in the second to fourth embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  A wireless communication system 1100 in FIG. 11 has a configuration conforming to the CPRI standard, and a plurality of REs 1111 to 111n and a REC 1120 that is connected and controlled in parallel to the plurality of REs 1111 to 111n are connected.

  The REC 1120 is connected to each RE 1111 to 111n via a plurality of optical cables 1141 to 114n which are CPRI transmission lines 1130.

  Each RE 1111 to 111n has a monitoring control line of the external device 201 used for maintenance or the like in an environment where the RE group is installed (for example, an indoor machine room or a storage room of a wireless device such as an outdoor cubicle). Have been introduced.

  In the present embodiment, the maintenance monitoring information table 722 collects maintenance monitoring information transmitted from each RE via the respective optical cables 1141 to 114n. Then, according to the master right 721, the maintenance monitoring information acquired by the RE having the master right is selected.

  The maintenance monitoring information table 722 in this embodiment may have the same configuration as that in the third embodiment. Note that the master right may be held by each RE.

[Sixth Embodiment]
Next, a radio communication system according to the sixth embodiment of the present invention is described. The wireless communication system according to the present embodiment is different from the fifth embodiment in that the maintenance control information is matched based on the majority decision in the wireless control device (REC). Since other configurations and operations are the same as those of the fifth embodiment, the same configurations and operations are denoted by the same reference numerals, and detailed description thereof is omitted.

  According to the present embodiment, it is possible to eliminate the delay in notification of maintenance monitoring information between different wireless devices (REs), obtain more reliable maintenance monitoring information, and eliminate REC confusion due to maintenance monitoring information.

<< Configuration of wireless communication system >>
FIG. 12 is a block diagram illustrating a configuration of a wireless communication system 1200 according to the present embodiment. In FIG. 12, the same components as those in the fourth and fifth embodiments are denoted by the same reference numerals, and description thereof is omitted.

  The difference of this embodiment from the fifth embodiment is that the REC 1220 uses the majority decision unit 921 and the maintenance monitoring information table 922 of the fourth embodiment. Therefore, the parallel connection of a plurality of REs and RECs of the fifth embodiment and the majority of maintenance monitoring information by the majority decision unit 921 of the fourth embodiment are combined.

[Other Embodiments]
In the above embodiment, the present invention has been described by taking as an example the case where a plurality of wireless devices (RE) acquire maintenance monitoring information of one external device, but the embodiment of the present invention is not limited to this. That is, according to the present invention, it becomes possible to centrally manage and report information in CPRI signals connected in cascade, so that not only correction of maintenance monitoring information of external devices but also information correction in cascade connected systems is necessary. Applicable to any system. For example, there may be a case where there are a plurality of external devices, or a case where information to be acquired is other than maintenance monitoring information. That is, the information to be acquired may be information used by the REC for control.

  Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. In addition, a system or an apparatus in which different features included in each embodiment are combined in any way is also included in the scope of the present invention.

  In addition, the present invention may be applied to a system composed of a plurality of devices, or may be applied to a single device. Furthermore, the present invention can also be applied to a case where a control program that realizes the functions of the embodiments is supplied directly or remotely to a system or apparatus. Therefore, in order to realize the functions of the present invention on a computer, a control program installed in the computer, a medium storing the control program, and a WWW (World Wide Web) server that downloads the control program are also included in the scope of the present invention. include.

[Other expressions of embodiment]
A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.
(Appendix 1)
A wireless communication system having a plurality of wireless devices and a wireless control device that controls the plurality of wireless devices,
Maintenance monitoring information transmitting means for transmitting maintenance monitoring information received by the plurality of wireless devices to the wireless control device;
Maintenance monitoring information control means for controlling the wireless control device to acquire maintenance monitoring information received by the plurality of wireless devices from the same transmission source as the same information;
A wireless communication system comprising:
(Appendix 2)
Setting means for setting a master right for the plurality of wireless devices;
The maintenance monitoring information control means controls the maintenance monitoring information received by a wireless device to which the master right is not set to be matched with the maintenance monitoring information received by the wireless device to which the master right is set. The wireless communication system according to Supplementary Note 1.
(Appendix 3)
Storage means for storing maintenance monitoring information received by each wireless device in association with the received wireless device,
The maintenance monitoring information control means receives the first maintenance monitoring information received by the wireless device to which the master right is not set and stored in the storage means, and received by the wireless device to which the master right is set and stored. The wireless communication system according to appendix 2, wherein the first maintenance monitoring information is corrected to the second maintenance monitoring information when different from the second maintenance monitoring information stored in the means.
(Appendix 4)
A collection means for collecting maintenance monitoring information received by each wireless device;
The wireless monitoring apparatus according to appendix 1, wherein the maintenance monitoring information control means sets maintenance monitoring information that matches a large number of the collected maintenance monitoring information as maintenance monitoring information acquired by the wireless control device. Communications system.
(Appendix 5)
The plurality of wireless devices sequentially transmit maintenance monitoring information received by each of the plurality of wireless devices, and a wireless device connected to the wireless control device transmits a plurality of maintenance monitoring information to the wireless control device. The wireless communication system according to any one of appendices 1 to 4, wherein the wireless communication system is connected in cascade.
(Appendix 6)
Any one of the supplementary notes 1 to 4, wherein the plurality of wireless devices are connected in parallel so that the maintenance monitoring information received by each of the plurality of wireless devices is transmitted to the wireless control device in parallel with other wireless devices. The wireless communication system according to 1.
(Appendix 7)
The information communication according to any one of appendices 1 to 5, wherein information communication is performed according to a CPRI (Common Public Radio Interface) standard between the plurality of wireless devices and between the wireless device and the wireless control device. Wireless communication system.
(Appendix 8)
The wireless communication system according to appendix 5, wherein the master right setting or the communication of the maintenance monitoring information uses Control & Management Plane and Layer 1 Vendor Specific in the CPRI protocol.
(Appendix 9)
A control method of a radio communication system having a plurality of radio devices and a radio control device for controlling the plurality of radio devices,
Maintenance monitoring information transmission step of transmitting maintenance monitoring information received by the plurality of wireless devices to the wireless control device;
Maintenance monitoring information control step for controlling maintenance monitoring information received by the plurality of wireless devices from the same transmission source as the same information; and
A control method for a wireless communication system, comprising:
(Appendix 10)
A wireless device in a wireless communication system having a plurality of wireless devices and a wireless control device that controls the plurality of wireless devices,
Master right storage means for storing whether or not a master right is set in the wireless device;
Maintenance monitoring information storage means for storing maintenance monitoring information received by the plurality of wireless devices;
Maintenance monitoring information correction means for correcting the maintenance monitoring information storage means to match different maintenance monitoring information to the maintenance monitoring information received by the wireless device when a master right is set in the master right storage means;
A wireless device comprising:
(Appendix 11)
A master right storage means for storing in a radio communication system having a plurality of radio apparatuses and a radio control apparatus for controlling the plurality of radio apparatuses, whether or not a master right is set for the radio apparatus. And a maintenance monitoring information storage means for storing maintenance monitoring information received by the plurality of wireless devices, and a control method of a wireless device,
A maintenance monitoring information correction step of correcting the maintenance monitoring information storage unit so that different maintenance monitoring information matches the maintenance monitoring information received by the wireless device when the master right is set in the master right storage unit; A method for controlling a wireless device.
(Appendix 12)
A master right storage means for storing in a radio communication system having a plurality of radio apparatuses and a radio control apparatus for controlling the plurality of radio apparatuses, whether or not a master right is set for the radio apparatus. And a maintenance monitoring information storage means for storing maintenance monitoring information received by the plurality of wireless devices, and a control program for the wireless device,
A maintenance monitoring information correction step for correcting the maintenance monitoring information storage means so that different maintenance monitoring information matches the maintenance monitoring information received by the wireless device when the master right is set in the master right storage means. A control program that is executed by a computer.

Claims (10)

A wireless communication system having a plurality of wireless devices and a wireless control device that controls the plurality of wireless devices,
Maintenance monitoring information transmitting means for transmitting maintenance monitoring information received by the plurality of wireless devices to the wireless control device;
Maintenance monitoring information control means for controlling the wireless control device to acquire maintenance monitoring information received by the plurality of wireless devices from the same transmission source as the same information;
A wireless communication system comprising: Setting means for setting a master right for the plurality of wireless devices;
The maintenance monitoring information control means controls the maintenance monitoring information received by a wireless device to which the master right is not set to be matched with the maintenance monitoring information received by the wireless device to which the master right is set. The wireless communication system according to claim 1. Storage means for storing maintenance monitoring information received by each wireless device in association with the received wireless device,
The maintenance monitoring information control means receives the first maintenance monitoring information received by the wireless device to which the master right is not set and stored in the storage means, and received by the wireless device to which the master right is set and stored. The wireless communication system according to claim 2, wherein the first maintenance monitoring information is corrected to the second maintenance monitoring information when different from the second maintenance monitoring information stored in the means. A collection means for collecting maintenance monitoring information received by each wireless device;
2. The maintenance monitoring information control unit according to claim 1, wherein the maintenance monitoring information control unit sets maintenance monitoring information that matches a large number of the collected maintenance monitoring information as maintenance monitoring information acquired by the wireless control device. Wireless communication system.   The information communication according to the CPRI (Common Public Radio Interface) standard is performed between the plurality of wireless devices and between the wireless device and the wireless control device. The wireless communication system described.   The wireless communication system according to claim 5, wherein the master right setting or the communication of the maintenance monitoring information uses Control & Management Plane and Layer 1 Vendor Specific in the CPRI protocol. A control method of a radio communication system having a plurality of radio devices and a radio control device for controlling the plurality of radio devices,
Maintenance monitoring information transmission step of transmitting maintenance monitoring information received by the plurality of wireless devices to the wireless control device;
Maintenance monitoring information control step for controlling maintenance monitoring information received by the plurality of wireless devices from the same transmission source as the same information; and
A control method for a wireless communication system, comprising: A wireless device in a wireless communication system having a plurality of wireless devices and a wireless control device that controls the plurality of wireless devices,
Master right storage means for storing whether or not a master right is set in the wireless device;
Maintenance monitoring information storage means for storing maintenance monitoring information received by the plurality of wireless devices;
Maintenance monitoring information correction means for correcting the maintenance monitoring information storage means to match different maintenance monitoring information to the maintenance monitoring information received by the wireless device when a master right is set in the master right storage means;
A wireless device comprising: A master right storage means for storing in a radio communication system having a plurality of radio apparatuses and a radio control apparatus for controlling the plurality of radio apparatuses, whether or not a master right is set for the radio apparatus. A method of controlling a wireless device comprising:
Maintenance monitoring information storage step for storing maintenance monitoring information received by the plurality of wireless devices in maintenance monitoring information storage means;
A maintenance monitoring information correction step of correcting the maintenance monitoring information storage unit so that different maintenance monitoring information matches the maintenance monitoring information received by the wireless device when the master right is set in the master right storage unit; A method for controlling a wireless device. A master right storage means for storing in a radio communication system having a plurality of radio apparatuses and a radio control apparatus for controlling the plurality of radio apparatuses, whether or not a master right is set for the radio apparatus. A wireless device control program comprising:
Maintenance monitoring information storage step for storing maintenance monitoring information received by the plurality of wireless devices in maintenance monitoring information storage means;
A maintenance monitoring information correction step for correcting the maintenance monitoring information storage means so that different maintenance monitoring information matches the maintenance monitoring information received by the wireless device when the master right is set in the master right storage means. A control program that is executed by a computer.

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