JP2004201336A - Wireless communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication system which permits a base node unit to collect monitoring information of each node unit isolated from the system and transmit the necessary control information to allow a prompt response to system recovery even in a ring disruption. <P>SOLUTION: If the ring disruption results in remote stations (31A, 32A, 33A, 34A, 35A, 36A, and 37A) isolated from the system, each wireless communication terminal (41, 42, 43, 44, 45, 46, and 47) connected to each of the isolated remote station is called in sequence from a wireless communication terminal 40 of a base station 20A, and information on the operation status in each remote station after the ring disruption is collected to the base station 20A. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention provides a wireless communication system in which a plurality of node devices and a base node device that exchanges information between these node devices are connected in a ring via a wireless device provided for each of the node devices. In particular, the present invention relates to an improvement in a control method of a node device that can improve the reliability of the system from the viewpoint of system recovery efficiency from a failure such as a line disconnection.

  FIG. 14 is a diagram showing a general configuration of this type of wireless communication system. This wireless communication system includes a monitoring control station 95 that manages monitoring and control information of the entire system, and a line (a large-capacity transmission line) for connecting to the outside of a network monitored and controlled by the monitoring control station 95. ) Is connected, a base station 101 that collects monitoring information of a wireless station (corresponding to a remote station to be described later) and distributes control information, and further passes the information to and from the center station 100. The base station 101 and the remote stations 102, 103, 104, 105, 106, 107, and 108 are provided for each of the plurality of remote stations 102, 103, 104, 105, 106, 107, and 108. They are connected in a ring by a wireless line established by the device.

  FIG. 15 is a diagram showing a configuration of a main part in the ring. As shown in the figure, in this system, the base station 101 and each of the remote stations 102, 103, 104, 105, 106, 107, 108 are bidirectionally transmitted to and from the opposing station by their own wireless devices. A wireless line can be established.

  As a result, as shown in FIG. 14, the communication route between the base station 101 and the remote stations 102, 103, 104, 105, 106, 107, and 108 as shown in FIG. A two-way communication route of the communication route is formed. As the use of these communication routes, for example, a clockwise communication route can be used as an active communication route, and a counterclockwise communication route can be used as a backup communication route.

  In the present system having such a ring structure, when a line disconnection section due to a propagation path failure or a device failure does not occur in the ring, for example, various kinds of information such as images, videos, voices, and texts from the base station 101 are not used. The data can be transmitted in the order of the remote stations 102 → 103 → 104 → 105 → 106 → 107 → 108 through the communication route.

  During the communication in the normal state, for example, as shown in FIG. 16, when a propagation path failure (indicated by X as the failure location 70) occurs between the remote stations 104 and 105, the remote station adjacent to the failure location 70 At the stations 104 and 105, loopback control for looping back and connecting the working communication route and the backup communication route is performed.

  As a result, a new communication route (the current communication route is turned back to the backup communication route with the remote stations 104 and 105 at the ends) is established in the ring around the failure occurrence point 70, and thereafter, Through this detour communication route, the base station 101 → remote station 102 → 103 → 104 → 103 → 102 → base station 101 → remote station 108 → 107 → 106 → 105 → 106 → 107 → 108 → base station 101 Maintain the exchange of information.

  By the way, in communication between the base station 101 or the remote stations (102, 103,...) Each realized by a wireless station, when wireless communication over a certain frequency band is performed, spatial conditions such as rainfall, snowfall, etc. There is a fact that changes in the quality greatly affect the quality of the line. For example, at a frequency of 23 GHz, an attenuation of about 26 dB per 1 km occurs when the annual line interruption rate due to rainfall is 0.00004%.

  Further, the worst situation due to the influence is a phenomenon of disconnection of a line. Although the system of FIG. 14 is provided with a function of maintaining the connection of the system using the loopback function in response to such a line disconnection, the system has a serious adverse effect depending on the conditions of the line disconnection due to rainfall or snowfall. May have an effect.

  That is when two lines (two propagation paths) are disconnected at the same time in the ring. In this case, when viewed from the base station 101, a remote station closer to the disconnected propagation path can maintain communication with the base station 101 by the loopback function and rescue communication. The station is disconnected from the system as a result of the connection with the base station 101 being cut off, and becomes unmanageable.

  Above all, the worst case is when both lines of the remote station adjacent to the base station 101 (corresponding to the remote stations 102 and 108 in the system of FIG. 14) are disconnected. In this case, all the remote stations are disconnected. Will be released from the system, and the system will be completely out of service.

  In order to minimize the influence of rainfall and snowfall on the system as described above, it is useful to shorten the propagation distance. However, in this type of system, the number of remote stations belonging to a certain ring is generally limited, so if the propagation distance between stations is set short according to the above-described method, the service area is reduced. You have to do it. In particular, this tendency becomes remarkable when the propagation distances are set at equal intervals in order to increase the fault tolerance against line disconnection while keeping the line margin between stations constant.

  On the other hand, if the transmission distances are not equal, the service area can be expanded, but on the other hand, there is a difference in the line margin between the stations. As described above, when the propagation distances are not set at equal intervals, in the conventional system, since no special consideration is given to the setting of the line margin for each station, the line margin between stations close to the base station 101 is increased. It was not always possible.

  For this reason, if the line margin between the stations near the base station 101 is small, that is, if the propagation distance between the stations near the base station 101 is long, it is assumed that the same rainfall (snowfall) is present. This also increases the possibility that two lines will be disconnected simultaneously between stations close to the base station 101. In this case, the number of remote stations separated from the system is larger than in the case where two lines are simultaneously disconnected between stations far from the base station 101, and there is a high risk of falling into a state near service stop.

  Further, in the system of FIG. 14, a function of maintaining the connection of the system by using a loopback function when the line is disconnected is provided. The function of maintaining the communication by this function is, for example, as shown in FIG. , Only when a line disconnection occurs in one line (one propagation path) in the ring.

  If two lines are disconnected in the ring, the remote station farther from the disconnection point when viewed from the base station 101 is disconnected from the system as a result of the line being disconnected from the base station 101, and the system operation is stopped. Above, it is fatal.

  In this case, the service as the system temporarily stops, but even in such a situation, the local service between the remote stations separated from the system is continued. Considering the efficiency of system restoration after the cause of the line disconnection has been investigated and line restoration measures have been taken, even during the above-mentioned service suspension period, the status of each remote station separated from the system and monitoring as necessary Control must be performed.

In response to such a request, even in a conventional system of this type, for example, a ring-shaped wireless communication system described in Patent Documents 1 and 2 below, after the line is disconnected, until the restoration of the line is completed, the base station 101 There was no way to communicate between remote stations separated from the system. For this reason, the status monitoring of remote stations separated from these systems and control as needed cannot be executed from the base station 101, and it is not possible to quickly respond to system restoration after line disconnection restoration. This was one of the factors that reduced reliability.
JP-A-58-044835 JP-A-62-196926

  As described above, in the above-described conventional system, when the ring is disconnected due to the disconnection of two lines and a node device separated from the system occurs, the base node device and the node device separated from the system are disconnected until the line disconnection recovery is completed. Since there was no communication means, the status of these node devices could not be monitored and controlled as necessary from the base node device, and prompt response to system restoration after line disconnection restoration was not possible. There was a problem that it was unavoidable.

  The present invention solves the above-mentioned problems, and can collect monitoring information of each node device separated from the system from the base node device and transmit control information as needed even when the ring is disconnected. It is an object of the present invention to provide a highly reliable wireless communication system capable of promptly responding to a request.

  In order to achieve the above object, according to the first aspect of the present invention, a plurality of node devices and a base node device for exchanging information between the node devices are connected via a wireless device provided for each of the node devices. In a wireless communication system connected in a ring shape, the base node device and the node device control external interface means for connecting a wireless communication terminal, and control communication by the wireless communication terminal via the external interface means. Wireless communication control means, wherein direct communication is possible between the base node device and the node device through the wireless communication terminal.

  According to a second aspect of the present invention, in the first aspect, the base node device manages monitoring information of all the node devices in the ring and control information distributed to each of the node devices. Disconnection detecting means for detecting that a wireless line from the own apparatus via each of the node devices has been disconnected, and the wireless communication control means of the base node device, based on a detection result of the disconnection detection means Originating a call from a wireless communication terminal connected to the own device to a wireless communication terminal connected to an arbitrary node device in the divided area, and communicating with the node device via communication between the wireless communication terminals. Control for exchanging the monitoring information and the control information.

  According to a third aspect of the present invention, in the second aspect of the present invention, the node device includes a node device monitoring control information managing unit that manages at least monitoring information and control information of the own device when the node device exists in the divided area. Wireless communication control means of said node device, said node device monitoring control information in response to an incoming call from said wireless communication terminal connected to said base node device to said wireless communication terminal connected to itself. The transmission of the management result of the management means is performed.

  According to a fourth aspect of the present invention, in the second aspect of the present invention, when the node device is present in at least the divided area, monitoring information of all the node devices in the area and control for distributing the monitoring information to each node device are provided. The system further comprises a system monitoring control information managing means for managing information, and the wireless communication control means of the node device receives a call from the wireless communication terminal connected to the base node device to the wireless communication terminal connected to the own device. In response to the call, control for transmitting a management result of the system monitoring control information management means is performed.

  According to a fifth aspect of the present invention, in the second aspect of the present invention, the base node device includes a call priority information holding unit that holds priority information on a call to each of the node devices after the line is divided. The wireless communication control means of the base node device calls the node devices in the divided area in the order according to the priority information.

  According to a sixth aspect of the present invention, in the first aspect, the wireless communication terminal is at least one of a PHS mobile terminal and a portable wireless terminal.

  According to the present invention, the base node device and the node device are provided with interface means capable of connecting a radio communication terminal to each of the base node device and the node device, and the base node device and the node device can directly communicate with each other via the radio communication terminals connected to each other. Since the wireless route is secured, even when the ring is disconnected, it is possible to collect monitoring information of each node device that is separated from the system from the base node device and transmit control information as needed from the base node device through the wireless route, and to recover the system. And a highly reliable wireless communication system capable of quickly responding to the problem.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a diagram showing an arrangement of each station in a ring of the wireless communication system according to the first embodiment of the present invention. The wireless communication system according to the first embodiment includes a monitoring control station 5 for managing monitoring and control information of the entire system, and a connection for connection to the outside of a network monitored and controlled by the monitoring control station 5. Collection of monitoring information and distribution of control information from a center station 10 to which a line (a large-capacity transmission line) is connected, and a wireless station (corresponding to a remote station to be described later), and transfer of such information to and from the center station 10 , And a plurality of remote stations 31, 32, 33, 34, 35, 36, and 37. The base station 20 and each of the remote stations 31, 32, 33, 34, 35, 36, and 37 are These stations are connected in a ring by a wireless line established by a wireless device provided for each station.

  As the center station 10, the base station 20, and the remote stations 31, 32, 33, 34, 35, 36, and 37, for example, an ATM transmission device that performs communication in an asynchronous transfer mode (ATM) can be applied.

  Each of the base station 20 and each of the remote stations 31, 32, 33, 34, 35, 36, and 37 can establish a two-way wireless channel with an opposing node device by its own wireless device. . Thereby, as a whole system, bidirectional communication of the clockwise communication route and the counterclockwise communication route in the figure is performed between the base station 20 and the remote stations 31, 32, 33, 34, 35, 36, and 37. Routes are formed and used, for example, as an active communication route and a backup communication route, respectively.

  In this type of system, there is a limit to the number of remote stations belonging to one ring, but in the system according to the first embodiment, the limit value for the number of stations is set to eight for convenience. (Of course, it is not limited to eight stations).

  The system according to the first embodiment is characterized in the arrangement between the base station 20 and the remote stations 31, 32, 33, 34, 35, 36, and 37 constituting a ring. That is, in this system, the arrangement of the remote stations 31, 32, 33, 34, 35, 36, and 37 is such that, with respect to the base station 20, the propagation distance between the stations closer to the base station 20 is short. In addition, the propagation distance is symmetrical in the clockwise and counterclockwise directions of the ring.

  That is, in this system, the line margin is set to be larger between stations closer to the base station 20 and to be smaller as the stations are farther from the base station 20. The line margin can be represented by the difference between the sum P1 of the transmission power, free space propagation loss, high-frequency circuit loss of the transmitting / receiving station, antenna gain and rain attenuation, and the sum P2 of the noise level of the receiver and the required C / N. .

  FIG. 2 shows, as an example, the propagation distance, the free space propagation loss, the rain attenuation when the annual line interruption rate due to rain is 0.00004%, and the standard incoming power for antennas in a certain frequency band in the quasi-millimeter wave band. It is a chart which shows the relationship between transmission power and line margin at the time of 30.0 dBm.

  From this table, it can be seen that, for example, when the propagation distance is 1.00 km and 0.60 km, the latter has a larger line margin by 9.9 dB than the former. This means that when the propagation distance is 0.60 km, more rain can be tolerated than when the propagation distance is 1.00 km.

  In the present invention, when arranging the remote stations 31, 32, 33, 34, 35, 36, and 37 in the wireless communication system in FIG. 1, the propagation distance between the stations is focused on the line margin read from the table shown in FIG. Is determined.

  In the first embodiment, as a specific value of the propagation distance, for example, the propagation distance between the base station 20 and the remote station 31 (the same value between the base station 20 and the remote station 37) is 0.20 km, the remote station The propagation distance between the remote station 31 and the remote station 32 (the same value between the remote station 36 and the remote station 37) is 0.40 km, and the propagation distance between the remote station 32 and the remote station 33 (the same value between the remote station 35 and the remote station 36). The propagation distance between the remote station 33 and the remote station 34 (the same value between the remote station 34 and the remote station 35) is determined to be 0.80 km, and the distance is set to 0.60 km.

  In this case, it is understood from the chart shown in FIG. 2 that the line margin of the line between the stations closer to the base station 20 can be increased by about 5 dB. Therefore, in this case, the line between the base station 20 and the remote station 31 or 37 adjacent to the base station 20 becomes the strongest against rainfall, and the base station 20 and the base station 20 are connected to each other as in the conventional system. The reliability of the system against rainfall can be improved as compared with an arrangement in which the remote station 31 or 37 adjacent to the station 20 is not considered to have a shorter propagation distance than other sections.

  This will be described in more detail with reference to FIG. FIG. 3 is a diagram illustrating an example of setting a bypass communication route when a failure occurs in a ring of the wireless communication system according to the first embodiment.

  In this system, for example, there is rainfall under the same conditions in the operation area of the entire system, and the amount of rainfall is between the remote station 33 and the remote station 34, which are spaced apart by a propagation distance of 0.80 km, and the remote station. From a line margin of 20.4 dB between the remote station 32 and the remote station 33 and between the remote station 35 and the remote station 36 arranged at a propagation distance of 0.60 km and exceeding a line margin of 17.8 dB between the remote station 34 and the remote station 35. It is assumed that the amount can cause a small attenuation.

  In this case, there is an extremely high risk that a failure will occur in the propagation path between the remote stations 33 and 34 and the transmission path between 34 and 35 having a line margin lower than the attenuation at this time. The risk of failure occurring in the propagation path between the remote stations 32 and 33 and between 35 and 36 is small.

  Further, between the remote stations 32 and 31, closer to the base station 20 side than the remote stations 32 and 35, between the remote stations 36 and 37, between the remote station 31 and the base station 20, and between the remote station 37 and the base station 20, Since the line margin is set to be higher, the fault tolerance against the propagation path fault becomes higher in order.

  Therefore, in the present system, a remote station closer to the base station 20 has a lower risk of being separated from the system, and a risk of being disconnected between the remote stations 31 and 37 adjacent to the base station 20 is minimized. The danger that all the remote stations are separated from the system can be greatly reduced. As a result, the worst situation in which there is no remote station capable of transmitting and receiving information to and from the base station 20 and the service is stopped can be avoided, thereby contributing to an improvement in system reliability.

  FIG. 3 is a view particularly showing a failure (a failure occurrence location) in the propagation path between the remote stations 33 and 34 and the propagation path between the remote stations 33 and 34 having the line margin lower than the attenuation at this time under the above-described arrangement environment based on the line margin. 70A and 70B) are shown.

  When such a failure occurs, a loopback control is performed in which the remote stations 33 and 35 adjacent to the failure locations 70A and 70B return and connect the working communication route and the backup communication route, respectively.

  As a result, a new communication route is established in the ring that is detoured at the remote stations 33 and 35 and that bypasses the above-mentioned failure locations 70A and 70B, and the base station 20 and the remote station 31 are routed through the bypass communication route. , 32, 33 and the remote stations 36, 37 can exchange various information.

  On the other hand, the remote station 34 is disconnected from the base station 20 by the loopback of the remote stations 33 and 35 to the base station 20 side, and is completely separated from the system.

  According to the present embodiment, the phenomenon of being separated from the system is less likely to occur between stations closer to the base station 20 for the reasons described above. Therefore, in the present embodiment, the risk of the propagation path between the base station 20 and the remote stations 31 and 37 adjacent to the base station 20 being disconnected is minimized. Depending on the setting of the line margin therebetween, at least the base station 20 and these remote stations 31 and 37 may be disconnected. It is expected that the line between the stations 31 and 37 is maintained so that only a minimum service can be maintained.

  Next, a second embodiment of the present invention will be described. FIG. 4 is a diagram showing an arrangement of each station in a ring of the wireless communication system according to the second embodiment of the present invention. In the wireless communication system according to the second embodiment, the arrangement of the remote stations 31, 32, 33, 34, 35, 36, and 37 is determined based on the base station 20. Is similar to the system according to the first embodiment in that the propagation distance is set shorter, but the first point is that the propagation distance is asymmetrical in clockwise and counterclockwise directions of the ring. This is different from the system according to the embodiment.

  As a specific value of the propagation distance, in the second embodiment, for example, the propagation distance between the base station 20 and the remote station 31 (the same value between the base station 20 and the remote station 37) is 0.20 km, the remote station The propagation distance between the remote station 31 and the remote station 32 is 0.30 km, the distance between the remote station 36 and the remote station 37 is 0.40 km, the distance between the remote station 32 and the remote station 33 is 0.50 km, and the distance between the remote station 33 and the remote station 33 is 0.50 km. The propagation distance between the remote stations 34 is determined to be 0.60 km, the propagation distance between the remote stations 34 and 35 is determined to be 0.80 km, and the propagation distance between the remote stations 35 and 36 is determined to be 1.00 km.

  With respect to this arrangement, from the chart shown in FIG. 2, the line margin between the stations closer to the base station 20 is about 2.5 dB, and the line margin between the stations farther from the base station 20 is shown. It can be seen that a line margin difference of about 5 dB can be set.

  Therefore, also in the arrangement of the second embodiment, the line between the base station 20 and the remote station 31 or 37 adjacent to the base station 20 becomes the strongest against rainfall, as in the conventional system. It is possible to increase the reliability of the system against rainfall as compared with an arrangement in which the base station 20 and the remote station 31 or 37 adjacent to the base station 20 are not considered to have a shorter propagation distance than other sections. it can.

  In particular, according to the arrangement of the second embodiment, the line margin between the remote stations is set arbitrarily, while following the method of arranging the stations closer to the base station 20 so that the line margin becomes larger. (There is no particular restriction on clockwise and counterclockwise rotation of the ring.) This makes it easy to respond to the need to set the propagation distance based on the importance of the remote station, for example. it can. In addition, for example, when an area such as heavy rain can be handled with a probability, it is possible to consider that a line margin in an area with a high probability is increased.

  In the first embodiment (see FIG. 1) and the second embodiment (see FIG. 4), the inter-station arrangement in a wireless communication system based on a single ring structure has been described. It is needless to say that the inter-station arrangement method according to (1) can be applied to, for example, a multi-ring connection type wireless communication system in which a plurality of basic ring structures adopted in the first and second embodiments are connected.

  FIG. 5 is a diagram showing a schematic configuration of a wireless communication system according to a third embodiment of the present invention, and in particular, a multi-ring connection type wireless communication applying the inter-station arrangement method according to the first embodiment. 1 shows a configuration example of a system.

  In the system according to the third embodiment, a plurality of rings 1 and 2 each having the configuration shown in FIG. 1 are connected by using one base station 20 directly received by the center station 10 as a base. It is composed of Here, the number of rings may be three or more.

  The ring 1 includes remote stations 311, 312, 313, 314, 315, 316, and 317 that are sequentially connected to the base station 20 by the above-described bidirectional wireless line. The arrangement of the remote stations 311, 312, 313, 314, 315, 316, 317 with respect to the base station 20 is such that, with respect to the base station 20, the propagation distance between the stations closer to the base station 20 is short, The clockwise and counterclockwise transmission distances are symmetrical.

  The ring 2 includes remote stations 321, 322, 323, 324, 325, 326, and 327. Each of these remote stations is based on the base station 20 and is located between stations closer to the base station 20. They are arranged so that the propagation distance is short and the propagation distance is symmetrical in the clockwise and counterclockwise directions of the ring.

  Also in the third embodiment, the arrangement of the remote stations in each of the rings 1 and 2 is set such that the propagation distance between the stations closer to the base station 20 is shorter than the base station 20. Therefore, as in the first and second embodiments, with respect to each of the rings 1 and 2, the line between the base station 20 and the remote station adjacent to the base station 20 becomes the strongest against rainfall, and the ring is completely destroyed. The risk can be reduced, and the reliability against rainfall or the like can be improved.

  Moreover, according to the multi-ring connection type wireless communication system according to the third embodiment, not only communication between remote stations in the same ring but also communication with remote stations in different rings via the base station 20. Since communication can also be performed, the communication area is wider than in the system configuration using one ring, and the service area can be greatly expanded.

  In the third embodiment, the case has been described in which the inter-station arrangement method according to the first embodiment is applied, but it goes without saying that the inter-station arrangement method according to the second embodiment can also be applied. . That is, thirdly, in each of the rings 1 and 2 in the embodiment, the propagation distance between the stations closer to the base station 20 is short with respect to the base station 20, and the propagation is performed clockwise and counterclockwise of the ring. The same effect can be expected even if the distance is asymmetrical.

  Next, another embodiment of the present invention will be described. The first to third embodiments are intended to increase the reliability of the system by making it difficult for the ring to be divided. However, each of the embodiments described below restores the ring after the ring is divided. Is carried out smoothly to improve the reliability of the system.

  In order to achieve this object, in each of the following embodiments, after the division of the ring, the collection of monitoring information and the transmission of necessary control information from the base station to the remote station separated from the system due to the division are continued. It is possible to re-establish the ring quickly after the line is restored, based on the information collected by the base station.

  FIG. 6 is a diagram illustrating a schematic configuration of a wireless communication system according to a fourth embodiment of the present invention. In the radio communication system according to the fourth embodiment, the basic configuration of the ring itself is the same as the systems according to the first and second embodiments.

  That is, this system includes a monitoring control station 5 that manages monitoring and control information of the entire system, and a line (a large-capacity transmission line) connected to the outside of a network monitored and controlled by the monitoring control station 5. ) Is connected, a base station 20A that collects monitoring information of a wireless station (corresponding to a remote station described later) and distributes control information, and further passes the information to and from the center station 10; The base station 20A and the remote stations 31A, 32A, 33A, 34A, 35A, 36A, and 37A are provided with a plurality of remote stations 31A, 32A, 33A, 34A, 35A, 36A, and 37A. They are connected in a ring by a wireless line established by the device.

  The base station 20A and each of the remote stations 31A, 32A, 33A, 34A, 35A, 36A, and 37A can establish a bidirectional wireless channel with an opposing station by their own wireless devices. Thereby, as a whole system, bidirectional communication of the clockwise communication route and the counterclockwise communication route in the figure between the base station 20A and the remote stations 31A, 32A, 33A, 34A, 35A, 36A, 37B. Routes are formed and used, for example, as an active communication route and a backup communication route, respectively. Also in the fourth embodiment, the limit value of the number of remote stations belonging to the ring is set to eight, and a system is constructed using eight remote stations within this limit value.

  In the system according to the fourth embodiment, even when remote stations separated from the system are generated due to the division of two propagation paths in the ring, monitoring information and communication between the separated remote station and the base station 20 are obtained. It is characterized by having a communication means capable of performing communication specialized for transfer of control information.

  As a specific embodiment of this communication means, in the fourth embodiment, the base station 20A and each of the remote stations 31A, 32A, 33A, 34A, 35A, 36A, 37A are connected to the wireless communication terminals 40, 41, 42, 43, 44, 45, 46 and 47 can be connected.

  Here, the wireless communication terminals 40, 41, 42, 43, 44, 45, 46, 47 may be installed in each remote station in advance, but it is necessary to transmit and receive monitoring control data via the wireless communication terminals. It may be installed only when necessary.

  As the wireless communication terminals 40, 41, 42, 43, 44, 45, 46, 47 according to the fourth embodiment, for example, a PHS (Personal Handyphone System) terminal or a mobile phone terminal can be used.

  From the wireless communication terminal 40 connected to the base station 20A, the wireless communication terminals 41, 42, 43, 44, 45, 46, 47 connected to the respective remote stations 31A, 32A, 33A, 34A, 35A, 36A, 37A. Can be selectively called to establish a wireless line, and monitor information and control information can be transmitted and received between the corresponding remote stations 31A, 32A, 33A, 34A, 35A, 36A, and 37A via the wireless line.

  In the fourth embodiment, in particular, in the case where remote stations separated from the system due to ring division occur, each wireless communication terminal connected to each of the separated remote stations is sequentially called from the base station 20A, and the above-described transmission / reception function is performed. , Information on the operation status of each remote station after the above-mentioned ring disconnection is collected in the base station 20A.

  According to this control, the base station 20A can continuously monitor the operation status of the remote station that is separated from the system and continues normal operation even after the ring division, and after the completion of the restoration of the divided propagation path. Based on the monitoring result, the system can be reconfigured promptly, and the service suspension period until system recovery can be shortened more than before so that the reliability of the system can be improved.

  FIG. 7 is a diagram illustrating the configuration of the base station 20A of the wireless communication system according to the fourth embodiment. The base station 20A includes two minimum antennas 210 and 220 necessary for realizing the two-way wireless ring as described above, wireless units 230 and 240 provided corresponding to these antennas 210 and 220, and a center, respectively. A wired interface unit 250 for connecting to the station 10 or a wired communication network, a system monitoring control information managing unit 260 for managing monitoring information and control information of all the stations constituting the wireless ring, a PHS terminal and a mobile phone. An external interface unit 270 for connecting the wireless communication terminal 40 such as a telephone terminal is provided. In addition, regarding the connection between the base station 20A and the wireless communication terminal 40, a personal computer (PC) 50 may be interposed as necessary.

  FIG. 8 is a diagram showing the configuration of a remote station 31A (the remote stations 32A, 33A, 34A, 35A, 36A, and 37A have the same configuration) in the wireless communication system according to the fourth embodiment. The remote station 31A includes two minimum antennas 310 and 320 required to realize the two-way wireless ring as described above, wireless units 330 and 340 provided corresponding to the antennas 310 and 320, respectively, A wired interface unit 350 for connecting to a communication network, a remote station monitoring and control information managing unit 360 for managing monitoring information and control information of the own station, a wireless communication terminal 41 (such as a PHS terminal and a mobile phone terminal). Each of the stations 32A, 33A, 34A, 35A, 36A, and 37A includes an external interface unit 370 for connecting the wireless communication terminals 42, 43, 44, 45, 46, and 47). . The connection between the remote station 31A and the wireless communication terminal 41 (the same applies to the connection between the remote stations 32A, 33A, 34A, 35A, 36A, 37A and the wireless communication terminals 42, 43, 44, 45, 46, 47). Alternatively, a personal computer (PC) 51 may be interposed as needed.

  In a wireless communication system in which the base station 20A (see FIG. 7) and the remote stations 31A, 32A, 33A, 34A, 35A, 36A, and 37A (see FIG. 8) having such a configuration are arranged as shown in FIG. As shown in FIG. 9, when faults (indicated by crosses as fault occurrence locations 70C and 70D) occur in the propagation paths at two locations between the remote stations 32A and 33A and between 36A and 37A, respectively, these failure occurrence locations 70C and The remote stations 32A and 37A adjacent to 70D perform loop-back control for looping back and connecting the working communication route and the backup communication route, respectively.

  As a result, in the ring, a detour communication route is established that is turned back to the base station 20A side with the remote stations 32A and 37A as terminals, and the base station 20A and the remote stations 31A, 32A, and 36A are routed through this detour communication route. Transmission and reception of various information can be continued.

  At the time of execution of this loopback, the monitoring information and control information of all the remote stations 31A, 32A, 37A connected to the base station 20A are transmitted to the base station 20A via a wireless line between the remote stations 31A, 32A, 37A. Collected and collected by the system monitoring control information management unit 260 and recognized. In other words, in this system, even when the ring is disconnected as shown in FIG. 9, in the area where the connection with the base station 20A is maintained, as in the loopback operation when one line is disconnected, Information relating to the operation of each remote station can be handled by the base station 20A.

  On the other hand, between the remote stations 33A, 34A, 35A, 36A farther from the failure locations 70C, 70D as viewed from the base station 20A, the remote stations 33A, 36A adjacent to the failure locations 70C, 70D respectively execute. By the loopback to the opposite side of the base station 20A, a ring composed of the remote stations 33A and 36A that performed the loopback and the remote stations 34A and 35A sandwiched between them is newly formed. , The normal communication operation is maintained.

  However, the ring formed by the remote stations 33A, 34A, 35A, and 36A farther from the failure occurrence points 70C and 70D is caused by the loopback of the remote stations 32A and 37A to the base station 20A side. And the communication route between them is cut off, leaving the system disconnected.

  In other words, the remote stations 33A, 34A, 35A, and 36A store information relating to the operation until the division of the propagation path at the failure occurrence points 70C and 70D is restored, and the system monitoring control information management unit of the base station 20A. It becomes a remote station that cannot be handled by 260.

  As described above, when a remote station separated from the system occurs, the base station 20A, for example, is located farther from the remote stations 32A and 37A based on information returned from the remote stations 32A and 37A via the loopback path. Recognize that the remote stations 33A, 34A, 35A, 36A have been separated from the system.

  Next, the base station 20A controls the mobile communication terminal 40 connected via the external interface unit 270 based on the recognition result, and thereby the remote stations 33A, 34A, 35A, 36A separated from the system. , And selectively calls the wireless communication terminals 43, 44, 45, and 46 connected to. At the time of this call, the telephone numbers of the respective wireless communication terminals 41, 42, 43, 44, 45, 46, 47 are stored in association with the respective remote stations 31A, 32A, 33A, 34A, 35A, 36A, 37A to be connected. In addition, a call may be made manually using the stored information or manually.

  After the wireless line is established by the above call, between the base station 20A and the remote station 33A, 34A, 35A, 36A of the call destination, for example, each remote station 33A, 34A responds to a request from the base station 20A. , 35A, and 36A execute a communication operation of transmitting monitoring information of the own station to the base station 20A.

  For example, after the occurrence of a failure as shown in FIG. 9, the wireless communication terminal 40 of the base station 20A calls the wireless communication terminal 43 connected to the remote station 33A that is disconnected from the system, and these wireless communication terminals 40 and 43 After the wireless link is established, the base station 20A transmits a polling request signal to the opposite wireless communication terminal 43 via the wireless communication device 40 via the wireless communication device 40.

  At this time, the remote station 33A accommodating the wireless communication terminal 43 takes in the polling request signal received by the wireless communication terminal 43 into the remote station monitoring control information management unit 360 via the external interface unit 370.

  The remote station monitoring and control information management unit 360 also operates during the operation in the ring separated from the system as in the case where the base station 20A is connected, such as in a normal state or a loopback due to disconnection of one line. , And manages monitoring information and control information relating to the operation of its own station.

  As described above, after the polling request signal from the base station 20A is fetched, the remote station 33A receives the polling request signal from the base station 20A, and the remote station 33A corresponds to the remote station corresponding to the result of management by the remote station monitoring control information management section 360 after the station has left the system. The monitoring control information is transmitted to the opposite wireless communication terminal 40 via the external interface unit 370 and the wireless communication terminal 43.

  On the other hand, the base station 20A fetches the remote station monitoring control information from the remote station 33A received by the wireless communication terminal 40 connected to its own station into the system monitoring control information management section 260 via the external interface section 270. Thereafter, the system monitoring and control information management unit 260 updates the remote station monitoring and control information on the remote station 33A based on the received content and continues the management.

  In this manner, in the fourth embodiment, even after the remote station 33A is released from the system, the monitoring control information of the remote station 33A is collected by the base station 20A as needed, whereby the remote station 33A is released from the system. The management of the remote station 33A can be continued in almost the same manner as in the case where there is no remote station.

  With respect to the remote stations 34A, 35A, and 36A other than the remote station 33A, which are separated from the system, the base station 20A can manage the monitoring control information of the respective remote stations after the system is separated by the same control.

  Therefore, after the propagation paths at the failure points 70C and 70D in FIG. 9 are restored, the remote stations 33A, 34A, 35A, and 36A that have been separated from the system up to that point are also re-accommodated in the system. In the station 20A, the system restructuring can be smoothly advanced using the monitoring control information of each of the remote stations 33A, 34A, 35A, 36A collected during the separation.

  In the above description of the fourth embodiment, the monitoring control information of each remote station 33A, 34A, 35A, 36A in the separated ring is collected and managed by the base station 20A in response to a request from the base station 20A. Although the case has been described, through the wireless route by the wireless communication terminals 43, 44, 45, and 46 connected to the respective remote stations 33A, 34A, 35A, and 36A, the remote stations 33A, 33A, It is also possible to selectively transmit predetermined control information to the remote stations 34A, 35A, and 36A, and to cause these remote stations 33A, 34A, 35A, and 36A to perform operation control corresponding to the control information.

  When monitoring information and control information are exchanged between the wireless communication terminal 40 connected to the base station 20A and the wireless communication terminals 43, 44, 45, 46 connected to the remote stations 33A, 34A, 35A, 36A. Has a longer information collection cycle than the case where information is transmitted and received via a wireless connection using a normal ring. On the other hand, a remote station (31A, 32A) that maintains a connection with the base station 20A. , 37A) can be dealt with by synchronizing the information collection cycle of the wireless route via the wireless communication terminal. In addition, after the information collection by the wireless route via the wireless communication terminal is completed, the information of all the remote stations may be arranged in accordance with the collection time to determine the state of the system.

  Further, in this embodiment, when the remote station is separated from the system, transmission and reception of monitoring control data is performed via each of the wireless communication terminals 40, 41, 42, 43, 44, 45, 46 and 47. However, the present invention is not limited to this, and the monitoring control data may be transmitted and received via the wireless communication terminal as necessary even when no failure occurs between the remote stations.

  As an example of such a usage example, a case is considered in which priority monitoring for collecting data on more items than a normal monitoring control is performed on a certain remote station. Specifically, normal heavy rain is falling around a remote station, and it is expected that the radio link will be disconnected due to rain attenuation in the future, or the operation of the remote station will be unstable. It may be necessary to collect more and more detailed data than the monitoring data. In such a case, while collecting normal monitoring data for each remote station via the transmission path, for the remote station to perform the priority monitoring, data items other than the normal monitoring data are wirelessly Data can be collected via a communication terminal.

  Next, a fifth embodiment according to the present invention will be described. The basic configuration of the wireless communication system according to the fifth embodiment is the same as that of the fourth embodiment shown in FIG. 6, for example, as shown in FIG. And a plurality of remote stations 31B, 32B, 33B, 34B, 35B, 36B, 37B connected in a ring by a wireless line. Wireless communication terminals 40, 41, 42, 43, 44, 45, 46, 47 are connected to the base station 20B and the remote stations 31B, 32B, 33B, 34B, 35B, 36B, 37B, respectively.

  The configuration of the base station 20B is the same as that of the base station 20A in the fourth embodiment. On the other hand, the configuration of each of the remote stations 31B, 32B, 33B, 34B, 35B, 36B, 37B is as shown in FIG. That is, the remote station 31B (the remote stations 32B, 33B, 34B, 35B, 36B, and 37B have the same configuration) shown in the figure includes two-way antennas 310 and 320, which are necessary to realize a bidirectional wireless ring. Radio units 330 and 340 provided corresponding to these antennas 310 and 320, a wired interface unit 350 for connecting to a wired communication network, and all remote units in the separated area when the own station is separated from the system. The system includes a system monitoring control information management unit 365 for managing the monitoring information and control information of the station as one system, and an external interface unit 370 for accommodating a wireless communication terminal 41 such as a PHS terminal or a mobile phone terminal. . In the fifth embodiment, the connection between the remote station 31B and the wireless communication terminal 41 (the remote stations 32B, 33B, 34B, 35B, 36B, 37B and the wireless communication terminals 42, 43, 44, 45, 46, 47) may be interposed with a personal computer (PC) 51 as necessary.

  In the fifth embodiment, when each remote station 31B, 32B, 33B, 34B, 35B, 36B, 37B is separated from the system, each remote station 31B, 32B, 33B, 36B, 37B communicates with another remote station in the separated area. While maintaining this communication, the system monitoring control information management unit 365 of each station manages the monitoring information and control information of each station as one system. That is, the remote stations 31B, 32B, 33B, 34B, 35B, 36B, 37B according to the fifth embodiment respectively manage the monitoring information and control information relating to only the own station when the own station is separated from the system. However, the present embodiment differs from the fourth embodiment in that the monitoring information and control information of the entire system composed of all the remote stations in the separated area are managed.

  The operation of the wireless communication system according to the fifth embodiment will be described. Now, during the operation of the system according to the fifth embodiment, for example, as shown in FIG. 10, a fault occurs in the propagation path between two remote stations 32B and 33B and between 36B and 37B (fault occurrence locations 70E, 70E). (Indicated by a cross mark as 70F) occurs.

  In this case, in the remote stations 32B and 37B adjacent to the failure points 70E and 70F, loopback control for looping back and connecting the working communication route and the backup communication route is performed.

  At the time of executing this loopback, the monitoring information and control information of all the remote stations 31B, 32B, and 37B connected to the base station 20B are transmitted to the base station 20B via the wireless line between the remote stations 31B, 32B, and 37B. Collected and collected by the system monitoring control information management unit 260 and recognized.

  On the other hand, between the remote stations 33B, 34B, 35B and 36B farther from the failure locations 70E and 70F as viewed from the base station 20B, the remote stations 33B and 36B adjacent to the failure locations 70E and 70F respectively execute the processes. By the loopback to the opposite side of the base station 20B, a ring composed of the remote stations 33B and 36B that performed the loopback and the remote stations 34B and 35B sandwiched between them is newly formed. , The normal communication operation is maintained.

  However, the ring formed by the remote stations 33B, 34B, 35B, and 36B farther from the failure occurrence points 70E and 70F is caused by the loopback of the remote stations 32B and 37B to the base station 20B side. And the communication route between them is cut off, leaving the system disconnected.

  As described above, when a remote station separated from the system is generated, the base station 20B, for example, is located farther from the remote stations 32B and 37B based on information returned from the remote stations 32B and 37B via the loopback path. Of the remote stations 33B, 34B, 35B and 36B of the remote station are separated from the system.

  Next, the base station 20B controls the mobile communication terminal 40 connected via the external interface unit 270 on the basis of the recognition result, whereby the remote stations 33B, 34B, 35B, and 36B separated from the system. , And selectively calls the wireless communication terminals 43, 44, 45, and 46 connected to.

  After the call establishes a wireless channel, between the base station 20B and the called remote station 33B, 34B, 35B, 36B, for example, each remote station 33B, 34B responds to a request from the base station 20B. , 35B, and 36B execute a communication operation of transmitting monitoring information of the own station to the base station 20B.

  For example, after the occurrence of a failure as shown in FIG. 10, a call is made from the wireless communication terminal 40 of the base station 20B to the wireless communication terminal 43 connected to the remote station 33B that is disconnected from the system, and these wireless communication terminals 40 and 43 After the wireless link is established, the base station 20B transmits a polling request signal to the opposing wireless communication terminal 43 via the wireless communication device 40 via the wireless communication device 40.

  At this time, the remote station 33B that accommodates the wireless communication terminal 43 takes in the polling request signal received by the wireless communication terminal 43 into the system monitoring control information management unit 365 via the external interface unit 370.

  As described above, the system monitoring control information management unit 365 manages monitoring information and control information relating to the operations of all the remote stations 33B, 34B, 35B, and 36B in the area where the own station is separated from the system. It is carried out.

  As described above, after the polling request signal from the base station 20B is fetched, the remote station 33B controls the system monitoring control corresponding to the management result in the system monitoring control information management unit 365 after the own station leaves the system. The information is transmitted to the opposite wireless communication terminal 40 via the external interface unit 370 and the wireless communication terminal 43.

  On the other hand, in the base station 20B, the system monitoring control information from the remote station 33A received by the wireless communication terminal 40 connected to the base station 20B is taken into the system monitoring control information management unit 260 via the external interface unit 270. Thereafter, the system monitoring and control information management unit 260 updates the system monitoring and control information relating to each of the remote stations 34B, 35B and 36B released from the system including the remote station 33B based on the received contents and continues to manage the system.

  The same control is applied to the remote stations 34B, 35B, and 36B released from the system other than the remote station 33B, and after the system is released, the system monitoring control information managed by the system monitoring control information management unit 365 of each of the stations is used to transmit the base monitoring information to the base station 20B. Can be managed.

  Accordingly, after the propagation paths at the failure points 70E and 70F in FIG. 10 are restored, the remote stations 33B, 34B, 35B, and 36B that have been separated from the system up to that point can be re-accommodated in the system. In the station 20B, the system restructuring can be smoothly advanced by utilizing the system monitoring control information of the system composed of the remote stations 33B, 34B, 35B, 36B collected during the separation.

  In particular, in the fifth embodiment, each remote station 33B, 34B, 35B, 36B in the system free area due to the occurrence of a failure as shown in FIG. The monitoring information and the control information are managed as one system including other stations in the area.

  Therefore, in the fifth embodiment, one remote station in an area separated from the system can be accessed to collect monitoring information on all remote stations in the area, and the base station in the fourth embodiment can be collected. As in the case of 20A, it is not necessary to sequentially access each remote station in the area separated from the system and collect such monitoring information.

  Next, a sixth embodiment of the present invention will be described. In the sixth embodiment, a management priority is set for each remote station, and when a remote station separated from the system is generated due to the division of the ring, the remote station having the highest management priority among the separated remote stations is set. To the base station, the remote station with the highest management priority collects and sends the monitoring information of all the remote stations that have separated. It is supposed to.

  Specifically, the basic configuration of the wireless communication system according to the sixth embodiment is the same as that of the fourth embodiment shown in FIG. 6, and for example, as shown in FIG. The base station 20C and a plurality of remote stations 31C, 32C, 33C, 34C, 35C, 36C, 37C are connected in a ring by a wireless line. Radio communication terminals 40, 41, 42, 43, 44, 45, 46, 47 are connected to the base station 20C and the remote stations 31C, 32C, 33C, 34C, 35C, 36C, 37C, respectively.

  The configuration of each of the remote stations 31C, 32C, 33C, 34C, 35C, 36C, and 37C is the same as that of the fourth embodiment (see FIG. 8).

  On the other hand, the base station 20C is configured as shown in FIG. That is, the base station 20C includes two-way antennas 210 and 220 for realizing a two-way wireless ring, wireless units 230 and 240 provided corresponding to these antennas 210 and 220, the center station 10 and wired communication. A wired interface unit 250 for connecting to a network or the like, a system monitoring and control information managing unit 265 for managing monitoring information and control information of all stations constituting a wireless ring, and a wireless communication unit such as a PHS terminal or a mobile phone terminal. An external interface unit 270 for connecting the communication terminal 40 is provided. For connection between the base station 20C and the wireless communication terminal 40, a personal computer (PC) 50 may be interposed as necessary.

  In the base station 20C, the system monitoring control information management unit 265 sets in advance for each of the remote stations 31C, 32C, 33C, 34C, 35C, 36C, and 37C in the ring. A management priority information storage unit 266 is provided for storing information (management priority information) indicating the priority of collecting system monitoring control information from a remote station.

  In the sixth embodiment, when each remote station separated from the system is generated due to the disconnection of the ring, the wireless communication terminal connected to the separated remote station is changed from the wireless communication terminal 40 connected to the base station 20C. The fourth embodiment is similar to that of the fourth embodiment in that the base station 20C makes a call and collects the monitoring information of the remote station according to the wireless route established thereby. The second embodiment differs from the fourth embodiment in that a call is made to the remote station having the highest management priority information stored in 266.

  In FIG. 12, the numbers enclosed by circles (1 to 8: 1 are the highest priorities, and the following 2 to 8 have the lowest priorities) indicate the remote stations 31C, 32C, 33C, 34C, 35C, It shows the management priority regarding the collection of the system monitoring control information for each of 36C and 37C.

  Next, the operation of the system according to the sixth embodiment will be described. Now, during the operation of the system according to the sixth embodiment, for example, as shown in FIG. 12, a fault occurs in two propagation paths between the remote stations 32C and 33C and between the remote stations 36C and 37C (fault occurrence locations 70G, (Indicated by a cross as 70H) occurs. In this case, the remote stations 32C and 37C adjacent to the failure locations 70G and 70H perform loopback control for looping back and connecting the working communication route and the backup communication route, respectively.

  At the time of executing this loopback, monitoring information and control information of the remote stations 31C, 32C, and 37C connected to the base station 20C are collected by the base station 20C via a wireless line between the remote stations 31C, 32C, and 37C. Are collected and recognized by the system monitoring control information management unit 260.

  On the other hand, between the remote stations 33C, 34C, 35C, and 36C farther from the failure locations 70G and 70H as viewed from the base station 20C, the remote stations 33C and 36C adjacent to the failure locations 70G and 70H respectively execute the processing. By the loopback to the opposite side to the base station 20C, a ring is newly formed which includes the remote stations 33C and 36C that performed the loopback and the remote stations 34C and 35C sandwiched between the two. The same communication operation is maintained.

  However, the ring formed by the remote stations 33C, 34C, 35C, and 36C farther from the failure occurrence points 70G and 70H is caused by the loopback of the remote stations 32C and 37C to the base station 20C side. And the communication route between them is cut off, leaving the system disconnected.

  As described above, when a remote station that is separated from the system is generated, the base station 20C is located farther from the remote stations 32C and 37C based on information returned from the remote stations 32C and 37C through the loopback path. Recognize that the remote stations 33C, 34C, 35C, 36C have been separated from the system.

  Next, the base station 20C controls the mobile communication terminal 40 connected via the external interface unit 270 based on the recognition result, thereby controlling the remote stations 33C, 34C, 35C, and 36C separated from the system. A call is made to the wireless communication terminal connected to the remote station having the highest management priority.

  At this time, the base station 20C refers to the management priority information stored in the management priority information storage unit 266 in the system monitoring control information management unit 265, and refers to the remote station having the highest priority (priority 4). 33C is selected, and a call is made to the wireless communication terminal 43 connected to the remote station 33C.

  After this call establishes a wireless link between the wireless communication terminals 40 and 43, for example, in response to a request from the base station 20C, the remote station 33C having the highest management priority among the remote stations separated from the system. Collects monitoring information from each of the other remote stations 34C, 35C, and 36C, and executes a transmission operation to the base station 20C together with the monitoring information of the own station.

  Hereinafter, the base station 20C refers to the management priority information stored in the management priority information storage unit 266 in the system monitoring control information management unit 265, and is connected to the remote stations 34C, 35C, and 36C in this order. The wireless communication terminals 44, 45, and 46 make calls and collect the monitoring information of the remote stations 34C, 35C, and 36C in the system monitoring control information management unit 265.

  The communication operation for collecting the system monitoring control information after the call is performed in the same manner as in the fourth and fifth embodiments, and the detailed description is omitted here.

  As described above, in the sixth embodiment, when there are remote stations separated from the system, these remote stations are called from the base station 20C according to a preset management priority, and the remote stations are monitored by the remote stations. Since the control information is collected in the base station 20C, it is possible to devise a method of preferentially collecting the monitoring control information of the important remote station by assigning the management priority.

  The fourth to sixth embodiments can be applied not only to a wireless communication system based on a single ring structure but also to a multiple ring connection type wireless communication system as shown in FIG. Needless to say.

FIG. 2 is a diagram showing an arrangement mode of each station in a ring of the wireless communication system according to the first embodiment. FIG. 2 is a table showing line margin characteristics for realizing the arrangement mode in FIG. 1. FIG. 2 is a diagram showing an example of setting a bypass communication route when a failure occurs in the system in FIG. 1. FIG. 9 is a diagram showing an arrangement of each station in a ring of the wireless communication system according to the second embodiment. FIG. 9 is a diagram illustrating a schematic configuration of a wireless communication system according to a third embodiment. FIG. 9 is a diagram illustrating a configuration of a wireless communication system according to a fourth embodiment. FIG. 14 is a diagram illustrating a configuration of a base station according to a fourth embodiment. FIG. 14 is a diagram illustrating a configuration of a remote station according to a fourth embodiment. FIG. 14 is a diagram showing an example of setting a detour communication route when a failure occurs in the wireless communication system according to the fourth embodiment. FIG. 14 is a diagram showing an example of setting a bypass communication route when a failure occurs in the wireless communication system according to the fifth embodiment. FIG. 14 is a diagram illustrating a configuration of a remote station according to a fifth embodiment. FIG. 16 is a diagram showing an example of setting a detour communication route when a failure occurs in the wireless communication system according to the sixth embodiment. FIG. 14 is a diagram illustrating a configuration of a base station according to a sixth embodiment. FIG. 1 is a diagram illustrating a general configuration of a wireless communication system. FIG. 15 is a diagram showing a configuration of a main part in a ring of the system in FIG. 14. FIG. 15 is a diagram showing an example of setting a bypass communication route when a failure occurs in the system in FIG. 14.

Explanation of reference numerals

Reference Signs List 5 monitoring control station 10 center station 20, 20A, 20B, 20C base station 210, 220 antenna 230, 240 radio section 250 wired interface section 260, 265 system monitoring control information management section 266 management priority information storage section 270 external interface section 31 , 31a, 31b, 31c, 31d, 31A, 31B, 31C, 32, 32A, 32B, 32C, 33, 33A, 33B, 33C, 34, 34A, 34B, 34C, 35, 35A, 35B, 35C, 36, 36A , 36B, 36C, 37, 37A, 37B, 37C, 301, 302, 303, 304, 305, 306, 307, 311, 312, 313, 314, 315, 316, 317, 321, 322, 323, 324, 325 , 326, 327, 331, 332, 333 34,335,336,337 Remote station 310,320 Antenna 330,340 Wireless unit 350 Wired interface unit 360 Remote station monitoring control information management unit 365 System monitoring control information management unit 370 External interface unit 40,41,42,43,44 , 45, 46, 47 Wireless communication terminal 50, 51 Personal computer (PC)
70A, 70B, 70C, 70D, 70E, 70F, 70G, 70H Failure location

Claims (6)

In a wireless communication system in which a plurality of node devices and a base node device that transmits and receives information between these node devices are connected in a ring via a wireless device provided for each of the node devices,
The base node device and the node device,
External interface means for connecting a wireless communication terminal;
Wireless communication control means for controlling communication by the wireless communication terminal via the external interface means,
A wireless communication system wherein direct communication is possible between the base node device and the node device through the wireless communication terminal. The base node device is
System monitoring control information management means for managing monitoring information of all node devices in the ring and control information distributed to each node device;
Disconnection detecting means for detecting that the wireless line from the own device via each of the node devices has been disconnected,
The wireless communication control means of the base node device includes:
Based on the detection result of the division detecting unit, a call is made from a wireless communication terminal connected to the own device to a wireless communication terminal connected to any node device in the divided area, and communication between the wireless communication terminals is performed. The wireless communication system according to claim 1, wherein the wireless communication system performs control of exchanging the monitoring information and the control information with the node device via a network. The node device is
A node device monitoring control information management unit that manages monitoring information and control information of the own device at least when the device is present in the divided area,
The wireless communication control means of the node device includes:
In response to an incoming call from the wireless communication terminal connected to the base node device to the wireless communication terminal connected to the own device, performing control for transmitting a management result of the node device monitoring control information managing means. The wireless communication system according to claim 2, wherein: The node device is
A system monitoring control information management unit that manages monitoring information of all node devices in the area and control information to be distributed to each of the node devices when at least in the divided area,
The wireless communication control means of the node device includes:
In response to an incoming call from the wireless communication terminal connected to the base node device to the wireless communication terminal connected to the own device, control is performed to transmit a management result of the system monitoring control information management means. The wireless communication system according to claim 2, wherein The base node device is
Call priority information holding means for holding priority information on a call to each of the node devices after the line is disconnected,
The wireless communication control means of the base node device includes:
The wireless communication system according to claim 2, wherein calls are made to each node device in the divided area in an order according to the priority information. The wireless communication system according to claim 1, wherein the wireless communication terminal is at least one of a PHS mobile terminal and a portable wireless terminal.

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