JP5822769B2 - Mobile communication system, base station, control apparatus, and mobile communication method - Google Patents

Description

  The present invention relates to a mobile communication system, a base station, a control device, and a mobile communication method, and more particularly, to control for distributing a load related to base station settings at the time of recovery from interruption of power supply to a base station due to a power failure. Is.

  In a mobile communication system, a control device performs control including a setting process of station data for setting a base station on a plurality of base stations. In a fourth generation mobile communication system, indoor communication quality improvement is performed. Therefore, use of a femtocell radio base station apparatus (hereinafter, the base station apparatus is simply referred to as a base station) is being studied (for example, see Non-Patent Document 1).

  When the femtocell radio base station is used, a large number of femtocell radio base stations are connected to the control device. In this case, when recovering from the power supply interruption to the femtocell radio base station due to a power failure, a plurality of femtocell radio base stations are activated all at once, requesting station data for setting the radio base station to the controller. If it does, the load of the process regarding base station setting will increase in a control apparatus.

  On the other hand, for example, in Patent Document 1, one base station acquires notification information (including identification information of a peripheral base station) of the peripheral base station from the peripheral base station, and transmits it to the control device. The load is reduced because the control device does not need to acquire broadcast information from a large number of base stations.

  Further, for example, in Patent Document 2, each femtocell radio base station transmits a reconnection promotion message to the terminal to the control device after the randomly set waiting time has elapsed, and each femtocell radio base station performs The start timing of the location registration is distributed to reduce the load on the control device.

Calin D. Claussen H. Uzunalioglu H. "On Femto Deployment Architectures and Macrocell Offloading Benefits in Joint Macro-Femto Deployments", IEEE Communications Magazine, January 2010.

JP 2010-161552 A JP 2010-166272 A

However, the prior art has the following problems.
In a mobile communication system in which station data for setting a base station is set under the control of a control device, when a plurality of base stations are activated all at once, the processing required for setting the station data for setting a base station is abrupt. Although a load increase occurs, in Patent Documents 1 and 2 described above, although the load on the control device can be reduced, all base stations connected to the control device have an opportunity to complete the processing equally. , when located femto cell radio base station in dead spots band, when recovering from a power supply cutoff to the radio base station for femtocell by a power failure, the first and foremost to the base station set to the radio base station for femtocell complete It is required to make it.

  In addition, in order to quickly recover the communication quality of users who have been reduced due to the interruption of power supply to the femtocell radio base station due to a power failure, the femtocell radio base station that has many terminals under the cell should also set the base station preferentially. It is required to be completed.

  Therefore, if all the femtocell radio base stations connected to the control device have an opportunity to complete the base station setting equally, there is a problem that the above request cannot be met.

  The present invention has been made in view of the above problems, and at the time of recovery from interruption of power supply to the base station due to a power failure, the base station is preferentially given from the predetermined base station while distributing the load related to the base station setting. It is an object of the present invention to obtain a mobile communication system, a base station, a control device, and a mobile communication method that can perform processing required for station data for setting.

  According to the mobile communication system of the present invention, a station for preferentially setting a base station from a predetermined base station at the time of recovery processing after power supply is resumed for a plurality of base stations that have been cut off. A mobile communication system that performs processing required for data, and determines whether or not each of a plurality of base stations exists in a dead zone. Perform the processing required for the data, and as a second step, for the base stations that do not exist in the dead zone, the number of terminals included in the communication area of the corresponding base station or the value of the number of people that the corresponding base station can accommodate Correspondingly, a start control unit that preferentially performs processing required for station data for a base station having a large number of terminals or number of persons is provided.

  In addition, according to the mobile communication method of the present invention, for a base station setting preferentially from a predetermined base station at the time of recovery processing after power supply is resumed for a plurality of base stations that have been shut off. In the mobile communication method executed in the mobile communication system for performing the processing required for the station data, a step of determining whether or not each of the plurality of base stations exists in the dead zone, A step of performing processing required for station data with the highest priority from a base station existing in the dead zone, and as a second stage, for a base station not existing in the dead zone, a terminal included in the communication area of the corresponding base station And a step of preferentially performing processing required for station data on a base station having a large number of terminals or the number of persons according to the number or the value of the number of persons that can be accommodated by the corresponding base station.

  According to the present invention, when a power failure occurs for a base station and power supply to its own base station power supply is interrupted, such as when processing is not performed normally, The base station itself or the control device detects that the processing performed in the base station is abnormal and that the base station exists in the dead zone, and is located in the dead zone among the detected base stations. When the processing required for the station data for setting the base station is performed with the highest priority from the base station that is not located in the dead zone, the number of terminals that are statistically present in the communication area of the base station, the base station capacity, Since it has a function that is prioritized from the base station with a large increase in the number of terminals, the load related to the base station setting is distributed while recovering from the interruption of the power supply to the base station due to a power failure. Preferentially set up base stations from Mobile communication system capable of performing a process required for the station data for the base station controller, and a mobile communication method can be obtained.

It is a block diagram which shows the general structural example of the whole mobile radio | wireless communications system containing the base station and control apparatus which concern on this invention. 1 is a block diagram showing a configuration example of a mobile radio communication system including a base station according to Embodiment 1. FIG. 6 is a diagram illustrating an example of a table in which a waiting time is set for the number of terminals in a base station communication area in Embodiment 1. FIG. FIG. 6 is a diagram illustrating an example of a table in which a waiting time for the number of base stations that can be accommodated is set in the first embodiment. FIG. 4 is a flowchart showing a processing example of the first embodiment. 6 is a block diagram illustrating a configuration example of a mobile radio communication system including a control device according to Embodiment 2. FIG. FIG. 10 is a diagram illustrating an example of a table in which priorities are set for each base station in the second embodiment. It is a figure which shows the example of a table which set the priority with respect to the number of terminals in a base station communication area in Embodiment 2. FIG. It is a figure which shows the example of a table which set the priority with respect to the increase degree of the number of terminals in the wide area base station in Embodiment 2. FIG. It is a figure which shows the example of a table which set the priority with respect to the accommodating number of base stations in Embodiment 2,3. FIG. 10 is a flowchart showing a processing example of the second embodiment. FIG. 10 is a block diagram illustrating a configuration example of a mobile radio communication system including a base station and a control device according to a third embodiment. FIG. 10 is a flowchart illustrating each processing example of the base station and the control device according to the third embodiment.

  Hereinafter, preferred embodiments of a mobile communication system, a base station, a control device, and a mobile communication method according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
In the first embodiment, when a power failure occurs in the base station and the power supply to the base station power supply is cut off or the process is not normally performed, the power of the base station is turned off. In addition, the base station itself detects that the processing performed in the base station is abnormal and that the base station exists in the dead zone, and the base station located in the dead zone among the detected base stations. When there is a station, the processing required for the station data for base station setting is performed with the highest priority without waiting time from the base station, and then the number of terminals statistically present in the communication area of the base station The base station has a function of performing processing with priority.

This will be specifically described below.
FIG. 1 shows an example of the configuration of an entire mobile communication system including a base station and a control device thereof according to the present invention. As illustrated, a plurality (four in the illustrated example) of base stations 2a to 2c and a wide area base station 3 are connected to one control apparatus 1 so as to be communicable.

  Each of the base stations 2a to 2c has communication areas 5a to 5c in which the terminal 4 is located, and the wide area base station 3 has a communication area 6 in which all the terminals 4 including the communication areas 5a to 5c are located. Each of the base stations 2a to 2c and the wide area base station 3 can make a request for station data for setting the base station to the control apparatus 1, and the control apparatus 1 can send a station request to the base stations 2a to 2c and the wide area base station 3. Data 12a-12c and 13 can be transmitted.

  FIG. 2 shows a configuration example of the first embodiment of each of the base stations 2a to 2c in the mobile communication system. FIG. 2 includes a power supply monitoring unit 10, an activation control unit 20, a surrounding environment measurement unit 30, a station data request unit 40, and a statistical information storage unit 50. The power supply monitoring unit 10 is connected to an external commercial power supply 7, and is connected so that the outputs of the power supply monitoring unit 10, the surrounding environment measurement unit 30, and the statistical information storage unit 50 are given to the activation control unit 20. The output of the activation control unit 20 is configured to be given to the control device 1 via the station data requesting unit 40.

Hereinafter, the base stations 2a to 2c may be described by using the “base station 2a” as a representative, and the communication areas 5a to 5c may also be described by using the “communication area 5a” as a representative. is there.
FIG. 3 shows a correspondence table 110 (corresponding to the first waiting time table) between the number of terminals in the base station communication area and the waiting time, and FIG. 4 shows a correspondence table 120 between the number of base stations that can be accommodated and the waiting time. (Corresponding to the second waiting time table) is shown, and these tables 110 and 120 are stored in the activation control unit 20.

  The operation of the mobile communication system having the above configuration will be described below with reference to the flowchart shown in FIG. First, in the base station 2a, the power supply monitoring unit 10 monitors processing performed in the base station when the power of the base station is turned off. If a power failure occurs and an abnormality is detected such as the power supply being cut off from the commercial power supply 7 to the power supply (not shown) of the own base station, then an abnormality occurs until the power of the own base station is turned on. Is stored in the power supply monitoring unit 10.

  When the power is turned on (step S1), the activation control unit 20 refers to whether or not the process at the previous power-off time stored in the power supply monitoring unit 10 is abnormal (step S2). .

  Further, when the power supply is turned on (step S1), when the power supply monitoring unit 10 detects that the process when the power supply is turned off last time is abnormal (Yes in step S2), the base station 2a measures the surrounding environment The unit 30 measures, for example, the downlink transmission power of the neighboring base stations, detects whether or not the own base station exists in the dead zone (step S3), and the activation control unit 20 refers to the detection result.

  The activation control unit 20 determines from the power supply monitoring unit 10 that the process at the time of the previous power OFF in the own base station was abnormal (Yes in step S2), and from the surrounding environment measurement unit 30 to the own base station. Is determined to be present in the dead zone (Yes in step S3), the station data request unit 40 is controlled to execute the station data request to the control device 1 without waiting time (step S4).

  In addition, the activation control unit 20 determines from the power supply monitoring unit 10 that the process at the time of the previous power OFF in the own base station was abnormal (Yes in step S2), and also from the surrounding environment measurement unit 30. When it is determined that the base station does not exist in the dead zone (No in step S3), the number x of the terminals 4 in the base station communication area 5a is acquired from the statistical information storage unit 50 (step S5), and the activation control unit 20 Based on the waiting time table 110 (see FIG. 3) held in the waiting time, it waits for the waiting time length for the station data request to the control device 1 (step S6).

  After the waiting time elapses, the station data request unit 40 is instructed to execute a station data request to the control device 1.

  Note that the statistical information storage unit 50 records time-based statistical information of the number of terminals connected to the own base station in advance, and the number of terminals 4 in the own base station communication area in each time zone can be referred to. Keep it like that. Thereby, a suitable priority can be set for every time slot | zone.

  On the other hand, when the activation control unit 20 is notified by the power supply monitoring unit 10 that the previous power-off process in the base station was not abnormal (No in step S2), the activation control unit 20 performs normal processing. The station data request unit 40 is instructed (step S7).

  If the time interval when the power supply is turned off is short and the power supply to the base station power supply is temporarily cut off, the activation control unit 20 requests the station data instead of the previous power off. It may be determined that there is no need to do so, and base station setting may be performed using the previous station data (before power supply interruption).

  On the other hand, the activation control unit 20 determines from the power supply monitoring unit 10 that the process at the time of the previous power OFF in the own base station was abnormal (Yes in step S2), and from the surrounding environment measurement unit 30 When it is determined that the base station does not exist in the dead zone (No in step S3), this is also stored in the start control unit 20 and the number of own base stations that can be stored in the statistical information storage unit 50. The stored capacity number vs. waiting time table 120 (see FIG. 4) is compared to wait for the corresponding waiting time length, and then the station data requesting unit 40 is instructed to request the station data to the control device 1.

  As described above, the base station 2a according to the first embodiment in the mobile communication system is based on the base station information acquired from the own base station information acquisition unit (the power supply monitoring unit 10 and the surrounding environment measurement unit 30). Thus, the number x of terminals 4 in the base station communication area 5a obtained from the statistical information recorded in the statistical information storage unit 50 (or the number y of base stations that can be accommodated) is held in the control unit 20. The execution time of the station data requesting unit 40 is controlled by comparing the waiting time table 110 (or the number of people that can be accommodated vs. waiting time table 120), and the control device 1 is requested for station data.

  For this reason, in the control apparatus 1, load distribution increases due to requests for processing related to base station setting from a plurality of base stations all at once, and there are many terminals in the dead zones and communication areas. By performing base station setting preferentially from existing base stations, the effect of early recovery of the coverage area can be obtained.

  The same processing as that of the base station 2a is also applied to the radio base station 2b having the base station communication area 4b and the radio base station 2c having the base station communication area 5c.

Embodiment 2. FIG.
In the second embodiment, the configuration of the entire mobile radio communication system including the base station and the control device is the same as that of the mobile radio communication system shown in FIG. Omitted.

  The difference from the first embodiment is that the base stations 2a to 2c are configured such that the power supply monitoring unit 10, the activation control unit 20, the peripheral environment measurement unit 30, the station data request unit 40, and the statistical information storage unit 50 Instead, the control device 1 side has the number of connected terminals per certain time or the radio resource usage rate in the wide area base station 3 having the terminals 4 of the base stations 2a to 2c in the communication area 6 Based on the degree of increase, the function of determining that the power-off in the base stations 2a to 2c is abnormal and storing it and the statistical information on whether or not the base station is located in the dead zone in advance are stored. And a function of setting priorities for the base stations 2a to 2c in the order in which the processes related to the base station setting are performed.

This will be specifically described below.
FIG. 6 shows a specific configuration example of the base station 2, the wide area base station 3, and the control device 1 thereof, particularly the control device 1 according to the second embodiment in the mobile communication system that realizes the above functions. . In the example of FIG. 6 as well, the base stations 2a to 2c shown in FIG.

  The control device 1 includes an abnormality monitoring unit 11, an activation control unit 21, an environment storage unit 31, a base station setting unit 41, and a statistical information storage unit 51. The abnormality monitoring unit 11 is connected to the wide area base station 3 and connected so that outputs of the abnormality monitoring unit 11, the environment storage unit 31, and the statistical information storage unit 51 are given to the activation control unit 21. The output is configured to be given to the base station 2 via the base station setting unit 41.

  FIG. 7 is a table 111 showing the correspondence between base station identification numbers and processing priorities, and FIG. 8 is a table 112 showing the correspondence between the number of terminals in the base station communication area and processing priorities. (Corresponding to the first priority table), FIG. 9 is a table 113 showing the correspondence between the degree of increase in the number of terminals connected to the wide area base station and the priority of processing, and FIG. A table 114 (corresponding to a second priority table) showing the correspondence between the number of people that can be accommodated and the priority of processing is shown, and these tables 111 to 114 are stored in the activation control unit 21. ing.

  The operation of the mobile communication system having the above configuration will be described below with reference to the flowchart shown in FIG. First, in the wide area base station 3 having the base stations 2 a to 2 c in the communication area 6, the abnormality monitoring unit 11 increases the number of connected terminals per certain time in the base station communication area 6 or the radio resource usage rate. The degree of increase is monitored (step S11).

  Here, the number of terminals 4 in the base station communication area 5a can be obtained from the radio wave arrival direction estimation information and the uplink received power value in each terminal 4 reported from the wide area base station 3. However, the reference value for monitoring the degree of increase may be acquired from the statistical information storage unit 51 as a value stored in advance.

  In this case, the statistical information storage unit 51 records in advance statistical information for each time zone of the number of terminals connected to each of the base stations 2a to 2c, and the number of terminals 4 in each base station communication area in each time zone. To be able to refer to. The radio resource usage rate may be used instead of the number of connected terminals per fixed time.

  Then, the abnormality monitoring unit 11 compares the number of connected terminals per fixed time in the wide area base station 3 or the increase rate of the radio resource usage rate with a predetermined threshold, A power failure occurs in a commercial power supply (not shown) in any or all of the base stations existing in the communication area 6 of the base station 3, and an abnormality occurs such that the power supply to the base station power supply is cut off. It is determined that the power has been turned off (Yes in step S12), and the fact that an abnormality has occurred in the base station existing in the communication area 6 of the wide area base station 3 is stored.

  After that, when the power is turned on for each of the base stations 2a to 2c, the activation control unit 21 stores the abnormality in the previous power off in the base stations 2a to 2c stored in the abnormality monitoring unit 11. See if.

  Then, the activation control unit 21 determines from the abnormality monitoring unit 11 that the process at the previous power-off in the base station 2 was abnormal, and the base station 2a refers to the environment storage unit 31 to When it is determined that it exists in the dead zone, the priority table 111 (see FIG. 7) is set so that the processing related to the base station setting for the base station 2 located in the dead zone is executed with the highest priority (step S13). .

  Whether or not the base stations 2a to 2c exist in the dead zone is analyzed in advance by the environment storage unit 31, and the identification number is stored together with the priority. Therefore, when there are a plurality of base stations located in the dead zone, the table 111 is set based on this priority.

  Then, the activation control unit 21 determines from the abnormality monitoring unit 11 that the process at the time of the previous power-off in the base station 2 was abnormal (Yes in step S12), and the environment storage unit 31 If it is determined that the station 2a does not exist in the dead zone, step S13 is bypassed, and the wide area base station 3 receives the radio wave arrival direction estimation information from the terminal 4 and the base station communication area 5a measured from the uplink received power value. The priority of processing related to base station setting for the base station 2a is set in the priority table 111 on the basis of the number of terminals 4 and the priority table 112 (see FIG. 8) held in the activation control unit 21. To do.

  Then, the base station setting unit 41 is notified of the priority table 111 set by the activation control unit 21. The base station setting unit 41 determines the order of processing related to the base station setting based on the priority table 111 notified from the activation control unit 21, and responds to the station data request from the base station according to the order (step S14). ). For the base station in the later order, control is performed so that the station data request is executed, for example, after a predetermined time.

  In the second embodiment, a unit for giving priority may be set for every base station existing in the communication area 6 of the wide area base station 3. At this time, the priority table 111 indicates the wide area base station priority according to the number of connected terminals per fixed time in the wide area base station 3 or the radio resource usage rate increase z (this is equivalent to the number of terminals in the table 112). It is set based on the table 113 (see FIG. 9).

  When the base station 2 has a short time interval when the power source is turned off and the base station 2 is short, and the power supply cutoff to the power source of the base station 2 can be determined to be temporary, the activation control unit 21 It may be determined that it is not necessary to transmit the base station setting again, and the base station 2 may be configured to use the previous station data.

  In addition, the activation control unit 21 determines from the abnormality monitoring unit 11 that the process at the time of the previous power OFF in the base station was abnormal, and the base station 2 does not exist in the dead zone from the environment storage unit 31. If this is determined, the base station setting for the base station 2a is made by comparing the capacity of the base station 2a and the capacity-to-capacity table / priority table 114 (see FIG. 10) held in the activation control unit 21. The priority of processing related to the above may be set in the priority table 111.

  As described above, the control device 1 in the wireless communication system according to the second embodiment is based on the base station information acquired from the base station information acquisition unit (the abnormality monitoring unit 11 and the environment storage unit 31). A priority table 111 representing the priority of processing related to base station setting is set and notified to the base station setting unit 41.

  Based on the priority table 111, the base station setting unit 41 determines the order of base station setting for each base station and executes processing to control the timing of responding to the base station request for station data.

  For this reason, in the control apparatus 1, load distribution that increases due to requests for processing related to base station setting from a plurality of base stations at the same time, base stations existing in the dead zone, and terminals in the communication area By performing base station setting preferentially from many base stations, the effect of early recovery of the coverage area can be obtained.

Embodiment 3 FIG.
Also in the second embodiment, the configuration of the entire mobile radio communication system including the base station and the control device is the same as that of the mobile radio communication system shown in FIG. Is omitted.

  The difference from the first embodiment is that the base station 2 a does not have the activation control unit 20 and the station data request unit 40, and the own base station information acquisition unit (power supply monitoring unit 10, ambient environment measurement unit 30). ) Has a function of transmitting the acquired base station information to the control device 1, and the control device 1 has a function of acquiring the base station information from the base station, and sets the base station to the base station 2a. This is the point that the function of the first embodiment is divided into the base station 2 a and the control device 1. Therefore, in the third embodiment, the mobile radio communication system is the target.

This will be specifically described below.
As shown in FIG. 12, the base station 2 a includes a power supply monitoring unit 10, a surrounding environment measurement unit 30, a statistical information storage unit 50, and a transmission unit 60. The power supply monitoring unit 10 is connected to an external commercial power supply 7. The outputs of the power supply monitoring unit 10, the surrounding environment measurement unit 30, and the statistical information storage unit 50 are connected so as to be given to the transmission unit 60.

  Further, the control device 1 includes a reception unit 61, an activation control unit 21, and a base station setting unit 41. The reception unit 61 has an input side connected to the transmission unit 60 of the base station 2a, and an output side an activation control unit. The activation control unit 21 is connected to the base station 2 a via the base station setting unit 41.

  The operation of the mobile communication system having the above configuration will be described below with reference to the flowchart shown in FIG. FIG. 2A shows the process in the base station 2a, and FIG. 2B shows the process in the control device 1.

  First, the base station 2 a transmits base station information acquired from the power supply monitoring unit 10 and the surrounding environment measurement unit 30 from the transmission unit 60 to the control device 1. In this case, the base station information is similar to the above-described embodiment, in the base station 2a, whether or not the process at the time of the previous power-off is abnormal (Yes in step S32), and the base station 2a exists in the dead zone (Step S33).

  In the control device 1, the receiving unit 61 receives the base station information, and the activation control unit 21 that has received the information indicates that the process at the time of the previous power OFF is abnormal in the base station 2a from the base station information, When it is recognized that the base station 2a is not located in the dead zone (step S41), the processing related to the base station setting for the base station 2a is executed with the highest priority in the built-in priority table 111 (see FIG. 7). Set to do.

  Further, the activation control unit 21 recognizes from the base station information that the process at the time of the previous power-off in the base station 2a is abnormal and that the base station 2a exists in the dead zone (step S41). ), In the wide area base station 3, the radio wave arrival direction estimation information from the terminal 4, the number of terminals 4 in the base station communication area 5a measured from the uplink received power value, and the activation control unit 21 On the basis of the priority table 112 (see FIG. 8), the priority of processing related to base station setting for the base station 2a is set in the priority table 111 (step S42).

  The number of terminals 4 in the base station communication area 5a may be acquired from the statistical information storage unit 50 in the base station 2a as a value stored in advance.

  Then, the base station setting unit 41 determines the order of processing related to the base station setting based on the priority table 111 notified from the activation control unit 21, and responds to the station data request from the base station according to the order ( Step S43). For the base station in the later order, control is performed so that the station data request is executed, for example, after a predetermined time.

  In the base station 2a, the base station setting is executed according to the order set by the control device 1 (step S34).

  In the third embodiment, as in the second embodiment, a unit for giving priority may be set for every base station existing in the communication area 6 of the wide area base station 3.

  Similarly to the second embodiment, the activation control unit 21 causes the base station 2a to have a short time interval during which the power is turned off, and temporarily cut off the power supply to the power of the base station. In this case, it may be determined that it is not necessary to transmit the base station setting again to the base station 2a, and the base station 2 may be configured to use the previous station data.

  Further, also in the third embodiment, in the same manner as in the second embodiment, the activation control unit 21 confirms that the abnormality monitoring unit 11 has performed abnormal processing at the time of the previous power-off in the base station. If it is determined, and it is determined from the environment storage unit 31 that the base station 2a does not exist in the dead zone, the capacity that can be accommodated in the base station 2a and the capacity that can be accommodated in the activation control unit 21 versus priority The priority of the processing related to the base station setting for the base station 2a may be set in the priority table 111 with reference to the table 114.

  As described above, the base station 2a in the mobile communication system according to the third embodiment uses the transmitter 60 to transmit the base station information acquired from the base station information acquisition unit (power supply monitoring unit, peripheral environment measurement unit) to the control device 1. The control device 1 refers to the priority table in the priority setting unit based on the base station information received by the receiving unit 61, and for the base station for which early coverage area recovery is required. Processing related to base station setting is executed preferentially.

  As a result, in the control device 1, load distribution that increases due to requests for processing related to base station setting from a plurality of base stations at the same time, base stations that exist in the dead zone, and terminals in the communication area By performing base station setting preferentially from many base stations, the effect of early recovery of the coverage area can be obtained.

  DESCRIPTION OF SYMBOLS 1 Control apparatus, 2a-2c, 2 Base station, 3 Wide area base station, 4 Terminal, 5a-5c, 6 Base station communication area, 7 Commercial power supply, 10 Power supply monitoring part, 11 Abnormality monitoring part, 20, 21 Startup control part , 30 ambient environment measurement unit, 31 environment storage unit, 40 station data request unit, 41 base station setting unit, 50, 51 statistical information storage unit, 60 transmission unit, 61 reception unit, 110, 120 waiting time table, 111-114 Priority table.

Claims (10)

In a mobile communication system that performs processing required for station data for setting a base station preferentially from a predetermined base station at the time of recovery processing after power supply is resumed for a plurality of base stations that have been shut off. There,
It is determined whether each of the plurality of base stations exists in a dead zone, and as a first step, processing necessary for the station data is performed with the highest priority from a base station existing in the dead zone, and as a second step For base stations that do not exist in the dead zone, depending on the number of terminals included in the communication area of the corresponding base station or the value of the number of persons that can be accommodated by the corresponding base station, A mobile communication system comprising: a start control unit that preferentially performs processing required for the station data for a base station having a large value. 2. The mobile communication system according to claim 1, wherein the station data is acquired from the control device by requesting the control device to request station data for base station setting, and the base station is set by the station data. A base station that performs
When the power of the base station is turned off, it is monitored whether or not the processing performed in the base station is normally performed. If there is an abnormality, until the next power on, A power supply monitoring unit that remembers that the process was abnormal;
And the surrounding environment measurement unit for the base station detects and stores that position in dead spots band,
A statistical information storage unit that stores the number of terminals connected to the base station as statistical information for each time zone;
A station data requesting unit for requesting the station data to the control device;
A first waiting time table in which the number of terminals existing in the own base station communication area and the waiting time when requesting the station data from the control device via the station data requesting unit is associated in advance. If it is determined that the previous power-off was abnormal from the stored contents of the power supply monitoring unit during the restoration process after the power supply is resumed, the peripheral environment is set as the first stage. When it is determined from the detection result of the measurement unit that the base station is in the dead zone, the station data request unit is instructed to execute the request process of the station data without waiting time, and as the second stage, the surrounding environment measurement unit When it is determined from the detection result that the base station does not exist in the dead zone, the waiting time corresponding to the number of terminals acquired from the statistical information storage unit by referring to the first waiting time table Identify, base station; and a start control unit after a specified the waiting time, the execution of request processing station data instructs the station data request unit. The mobile communication system according to claim 1, connected to one wide area base station and a plurality of base stations included in the same communication area as the wide area base station, A control device that transmits station data for setting a base station according to a priority for each of the plurality of base stations, based on a monitoring result of a communication state,
In the wide area base station, the degree of increase in the number of connected terminals per fixed time or the degree of increase in the radio resource usage rate is monitored, and when the degree of increase exceeds a predetermined threshold, the plurality of base stations It is determined that the power supply to the power supply has been cut off and the power supply has been turned off in one or more of the units, and then the previous power-off process of the base station is abnormal until the power supply of the base station is turned on. An abnormality monitoring unit that remembers what happened,
Among the plurality of base stations, an environment storage unit that detects and stores a base station located in a dead zone;
A base station setting unit for performing transmission processing of the station data for setting the base station for each base station;
As a table common to the plurality of base stations, a first priority table that associates the number of terminals existing in the communication area of the base station with priorities is stored in advance, and the base station is turned on. In a later recovery process, if it is determined from the stored contents of the power monitoring unit that the previous power off was abnormal, as a first step, it exists in the dead zone from the detection result of the environmental measurement unit Instructing the base station setting unit to give the highest priority to the transmission processing of the station data for the base station setting to the base station, and as a second step, from the detection result of the environment measurement unit to the dead zone For base stations that do not exist, the number of terminals in each base station communication area using the radio wave arrival direction estimation information in each terminal reported from the wide area base station and the downlink transmission power value of the wide area base station Asking before By referring to the first priority table, the priority corresponding to the obtained number of terminals is specified, and the transmission processing of the station data for setting the base station for each base station is set to the specified priority. And a start control unit that commands the base station setting unit to perform the control accordingly. The mobile communication system according to claim 1, connected to one wide area base station and a plurality of base stations included in the same communication area as the wide area base station, A control device that transmits station data for setting a base station according to a priority for each of the plurality of base stations, based on a monitoring result of a communication state,
In the wide area base station, the degree of increase in the number of connected terminals per fixed time or the degree of increase in the radio resource usage rate is monitored, and when the degree of increase exceeds a predetermined threshold, the plurality of base stations It is determined that the power supply to the power supply has been cut off and the power supply has been turned off in one or more of the units, and then the previous power-off process of the base station is abnormal until the power supply of the base station is turned on. An abnormality monitoring unit that remembers what happened,
Among the plurality of base stations, an environment storage unit that detects and stores a base station located in a dead zone;
A statistical information storage unit that stores the number of terminals connected to each base station as statistical information for each time zone;
A base station setting unit for performing transmission processing of the station data for setting the base station for each base station;
As a table common to the plurality of base stations, a first priority table that associates the number of terminals existing in the communication area of the base station with priorities is stored in advance, and the base station is turned on. In a later recovery process, if it is determined from the stored contents of the power monitoring unit that the previous power off was abnormal, as a first step, it exists in the dead zone from the detection result of the environmental measurement unit Instructing the base station setting unit to give the highest priority to the transmission processing of the station data for the base station setting to the base station, and as a second step, from the detection result of the environment measurement unit to the dead zone For base stations that do not exist, the number of terminals is obtained from the statistical information stored in the statistical information storage unit, and the priority corresponding to the obtained number of terminals is referred to by referring to the first priority table. Identify and A start control unit that instructs the base station setting unit to perform a transmission process of the station data for setting the base station to each base station according to the specified priority. apparatus. The mobile communication system according to claim 1, wherein
A plurality of base stations having a function of notifying whether or not the base station is located in a dead zone;
Based on base station information from the plurality of base stations, and connected to the wide area base station and the plurality of base stations, for each of the plurality of base stations, for base station setting according to priority And a control device for transmitting the station data of
Each of the plurality of base stations is
When the power of the base station is turned off, it is monitored whether or not the processing performed in the base station is normally performed. If there is an abnormality, until the next power on, A power supply monitoring unit that remembers that the process was abnormal;
And the surrounding environment measurement unit for the base station detects and stores that position in dead spots band,
A statistical information storage unit that stores the number of terminals connected to the base station as statistical information for each time zone;
Information on whether or not the previous power-off process based on the stored contents of the power monitoring unit is abnormal, information on whether or not the own base station is located in the dead zone based on the detection result of the surrounding environment measurement unit, And a transmission unit for notifying the statistical information stored in the statistical information storage unit to the control device as base station information,
The controller is
A receiver that receives the base station information from the transmitter in each base station;
A base station setting unit for performing transmission processing of the station data for setting the base station for each base station;
As a table common to the plurality of base stations, a first priority table in which the number of terminals existing in the communication area of the base station and the priority are associated with each other is stored in advance, and based on the base station information In the recovery process after the base station power is turned on, as a first step, the station data for setting the base station is set for the base station in which the previous power-off is abnormal and in the dead zone. The base station setting unit is instructed to perform the transmission process with the highest priority, and as a second step, for base stations that do not exist in the dead zone, the number of terminals is determined from the statistical information included in the base station information. The priority corresponding to the obtained number of terminals is identified by referring to the first priority table, and the transmission processing of the station data for setting the base station for each base station is identified. Priority Mobile communication system, comprising a start control unit that Flip instructs the base station setting section as done. The mobile communication system according to claim 1, wherein
One wide area base station,
A plurality of base stations that are included in the same communication area as the wide area base station and have a function of notifying whether or not the own base station is located in a dead zone;
Based on base station information from the plurality of base stations, and connected to the wide area base station and the plurality of base stations, for each of the plurality of base stations, for base station setting according to priority And a control device for transmitting the station data of
Each of the plurality of base stations is
When the power of the base station is turned off, it is monitored whether or not the processing performed in the base station is normally performed. If there is an abnormality, until the next power on, A power supply monitoring unit that remembers that the process was abnormal;
And the surrounding environment measurement unit for the base station detects and stores that position in dead spots band,
Information on whether or not the previous power-off process based on the stored contents of the power monitoring unit is abnormal, and information on whether or not the own base station is located in the dead zone based on the detection result of the surrounding environment measurement unit And a transmission unit that notifies the control device as base station information,
The controller is
A receiver that receives the base station information from the transmitter in each base station;
A base station setting unit for performing transmission processing of the station data for setting the base station for each base station;
As a table common to the plurality of base stations, a first priority table in which the number of terminals existing in the communication area of the base station and the priority are associated with each other is stored in advance, and based on the base station information In the recovery process after the base station power is turned on, as a first step, the station data for setting the base station is set for the base station in which the previous power-off is abnormal and in the dead zone. The base station setting unit is instructed to perform the transmission process with the highest priority, and as a second step, for base stations that are not in the dead zone, the radio wave arrival at each terminal is reported from the wide area base station. By using the direction estimation information and the downlink transmission power value of the wide area base station, the number of terminals in each base station communication area is obtained, and the first priority table is referenced to correspond to the obtained number of terminals. Identify the priority and A start control unit for instructing the base station setting unit to perform a transmission process of the station data for setting the base station to each base station according to the specified priority. Body communication system. In the base station according to claim 2,
The activation control unit needs to request the station data when the time interval when the power is turned off is shorter than the lower limit value at which the power supply to the power supply of the base station is temporarily cut off. A base station that determines that there is no power supply and performs the base station setting using station data before power supply is cut off. In the base station according to claim 2,
Instead of storing the first waiting time table in advance, the activation control unit requests the station data through the station data request unit to the control device and the number of people that can be accommodated in the base station. The second waiting time table in which the waiting time at the time of performing the process is stored in advance, and in the recovery process after the power supply is resumed, as the second stage, instead of the first waiting time table The base station is characterized by referring to the second waiting time table. The control device according to claim 3 or 4,
Instead of storing the first priority table in advance, the activation control unit stores in advance a second priority table in which the number of accommodable base stations and the priority are associated with each other. In the recovery process after the base station power is turned on, if it is determined from the stored contents of the power monitoring unit that the previous power off was abnormal, the second step is the first step. A control device that refers to the second priority table instead of the priority table. In a mobile communication system that performs processing required for station data for setting a base station preferentially from a predetermined base station at the time of recovery processing after power supply is resumed for a plurality of base stations that have been shut off. A mobile communication method to be executed, comprising:
Determining whether each of the plurality of base stations is in a dead zone; and
As a first stage, performing a process required for the station data with the highest priority from a base station existing in the dead zone;
As a second step, for base stations that do not exist in the dead zone, the number of terminals depends on the number of terminals included in the communication area of the corresponding base station or the value of the number of persons that can be accommodated by the corresponding base station. Or a step of preferentially performing a process required for the station data for a base station having a large value of the number of persons.

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