JP2013121128A - Management server and power saving method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform power saving of an entire wireless communication network according to power use rates while considering its influence on service.SOLUTION: A management server 105 connected to a plurality of wireless communication base stations 100 via a network 103, comprises: a reception unit which receives information of power use rates transmitted from other servers; and a control unit which determines operation levels indicating operation states of the wireless communication base stations on the basis of the power use rates and instructs each wireless communication base station to change its operation level.

Description

  The present invention relates to a management server and a power saving method, and is suitable for application to a management server and a power saving method for achieving power saving in wireless communication.

  In general, the amount of power used increases in the summer when air conditioning operations increase, and the power usage rate of local power companies reaches a peak. If the amount of power used exceeds the amount supplied by the power company, a simultaneous power outage will occur and the society will be greatly affected. Therefore, it is necessary to constantly monitor the power usage rate. For example, due to the occurrence of a large-scale disaster, stable power supply may be difficult, and the amount of power generation may be limited. In this way, when the amount of power generation is limited, it is important to save power especially in the entire social infrastructure.

  In a wireless communication system, thousands of base stations are within the jurisdiction of a power company and use a large amount of power. For this reason, it can be expected that the power consumption rate of the entire society is suppressed by saving power when the power usage rate increases.

  For example, in Patent Document 1, it is possible to operate a radio communication system with optimal power consumption by controlling power on / off of a signal processing unit of a radio base station apparatus according to a change in traffic volume. For example, when the traffic amount increases, the power of the signal processing unit in the power-off state is turned on, and when the traffic amount decreases, the power of the signal processing unit in the power-on state is turned off.

JP 2010-166474 A

  However, in Patent Document 1, since the power supply of the radio base station apparatus is controlled in consideration of only the traffic volume, the power supply of the radio base station apparatus is turned off even if the power usage rate increases and the power generation amount is tight. Thus, power saving is not performed, and it is difficult to control the power consumption of the entire wireless communication system.

  In addition, if the power usage rate rises, if power saving is implemented in the entire wireless communication system, an effect on reducing the power usage rate can be expected, but the effect on the service due to the power saving is as small as possible. It is desirable.

  The present invention has been made in view of the above points, and a management server capable of reducing the power consumption of the entire wireless communication network according to the power usage rate while considering the influence on the service, and the power saving We are going to propose a method.

  In order to solve such a problem, in the present invention, a management server connected to a plurality of radio communication base stations via a network, and a receiving unit that receives information on a power usage rate transmitted from another server; A control unit that determines an operation level indicating an operation state of the radio communication base station based on the power usage rate, and instructs each radio communication base station to change to the operation level. A management server is provided.

  According to such a configuration, it is possible to control the operation of a plurality of radio communication base stations according to the current power usage rate. As a result, it is possible to reduce the power consumption of the entire wireless communication network and prevent a situation where the power usage rate reaches a peak and a simultaneous power failure occurs. By changing the operation level in stages according to the power usage rate, it is possible to save power in the entire wireless communication network in consideration of the influence on the service.

  According to the present invention, it is possible to reduce power consumption of the entire wireless communication network while minimizing the influence on the service.

It is a block diagram which shows the structure of the radio | wireless communications system which concerns on one Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless communication base station concerning the embodiment. It is a block diagram which shows the structure of the management server concerning the embodiment. It is a conceptual diagram explaining the operation level of the radio | wireless communication base station concerning the embodiment. It is a conceptual diagram explaining the base station information of the radio | wireless communication base station concerning the embodiment. 5 is a flowchart showing details of the operation of the wireless communication system according to the embodiment. It is a flowchart which shows the process sequence of the operation level determination process concerning the embodiment. It is a flowchart which shows the process sequence of the recovery process of the power saving state concerning the embodiment.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Outline of the present embodiment First, the outline of the present embodiment will be described. In general, the amount of power used increases in the summer when air conditioning operations increase, and the power usage rate of local power companies reaches a peak. If the amount of power used exceeds the amount supplied by the power company, a simultaneous power outage will occur, which will have a profound impact on society. Therefore, it is necessary to constantly monitor the power usage rate. For example, when stable power supply becomes difficult due to the occurrence of a large-scale disaster, etc., the amount of power generation is limited, so it is effective and important to reduce power consumption especially in the entire social infrastructure. Come.

  In a wireless communication system, thousands of base stations are within the jurisdiction of a power company and use a large amount of power. For this reason, suppression of the power usage rate can be expected by performing power saving when the power usage rate increases.

  For example, a technique is disclosed that enables a radio communication system to be operated with optimum power consumption by controlling power on / off of a signal processing unit of a radio base station apparatus in accordance with a change in traffic volume. For example, when the traffic amount increases, the power of the signal processing unit in the power-off state is turned on, and when the traffic amount decreases, the power of the signal processing unit in the power-on state is turned off. However, in the above technique, there is no relation between the overall power usage rate and the optimization of power consumption in each radio base station apparatus, and it has been difficult to control power consumption as a whole radio communication system.

  For example, when the power usage rate increases, the power usage rate can be reduced by implementing power saving in the entire wireless communication system. On the other hand, it is desired that the influence on various services by saving power in the entire wireless communication system is as small as possible. However, if only the impact on the service is emphasized, the effect on reducing the power usage rate is small, and as a result, a simultaneous power failure cannot be avoided.

  Therefore, if the amount of power used in the entire wireless communication system can be adjusted according to the degree of increase in the power usage rate, it is possible to reduce the power usage rate while taking into consideration the effect on the service. For example, if the increase in the power usage rate is small, implement power saving that has little effect on the service, and if the increase in the power usage rate is large, avoid simultaneous power outages even if the impact on the service is large Therefore, it is necessary to implement significant power saving at the expense of a predetermined service.

  Therefore, in the present embodiment, the operation state of each wireless communication base station is changed based on the power usage rate transmitted from the power company. As a result, it is possible to reduce the power consumption of the entire wireless communication network in accordance with the power usage rate while taking into consideration the influence on the service.

(2) Configuration of Radio Communication System Next, the configuration of the radio communication system 1 according to the present embodiment will be described. As shown in FIG. 1, a wireless communication system 1 includes a plurality of wireless communication base stations 100A, 100B, and 100C (hereinafter also referred to as wireless communication base station 100), a portable terminal 101, a gateway. 102, a network 103, a power company server 104, and a management server 105.

  The plurality of wireless communication base stations 100 are connected to the network 103 via the gateway 102 and perform wireless communication with the mobile terminal 101. The mobile terminal 101 is a mobile phone or the like, and performs wireless communication with the wireless communication base station 100 or performs voice communication or data communication with another mobile terminal 101.

  The gateway 102 has a function of performing protocol conversion between networks, and the radio communication base station 100 is connected to the network 103 via the gateway 102. The network 103 is a communication line network that connects the apparatuses so that they can communicate with each other. For example, a public line network such as the Internet, a telephone line network, a satellite communication network, a WAN (Wide Area Network), a LAN, an IP- It is composed of a dedicated line network such as VPN and can be wired or wireless.

  The power company server 104 is connected to the management server 105 via the network 103 and transmits information on the power usage rate to the management server 105.

  The management server 105 is connected to the power company server 104 via the network 103 and acquires information on the power usage rate transmitted from the power company server 104. Further, it connects to a plurality of radio communication base stations 100 and receives information such as the configuration of each radio communication base station 100 and the number of carriers from each radio communication base station 100.

(3) Configuration of Radio Communication Base Station Next, the configuration of the radio communication base station 100 will be described. As shown in FIG. 2, the radio communication base station 100 includes an operation unit 212, a redundancy unit 213, a main control unit 208, a switch 209, a standby power supply 211, and the like.

  The operation unit 212 and the redundant unit 213 have the same function, and when the operation unit 212 fails, the operation unit 212 and the redundant unit 213 are switched to the redundant unit 213 so that the service can be operated without interruption. It has become.

  The operation unit 212 and the redundancy unit 213 include a radio signal transmission / reception unit 200, a modulation / demodulation processing unit 201, a line interface unit 202, a base station control unit 203, and the like.

  The radio signal transmission / reception unit 200 is connected to a transmission / reception shared 0-system antenna 204 and a reception-use 1-system antenna 205, and performs amplification and transmission / reception of baseband signals. The modulation / demodulation processing unit 201 modulates and demodulates data received from the radio signal transmission / reception unit 200 and the line interface unit 202 and transmits the data to the radio signal transmission / reception unit 200 and the line interface unit 202. The line interface unit 202 is an interface between the radio communication base station 100 and the main control unit 208. The base station control unit 203 includes a transmission power control unit 206 and base station information 207. The transmission power control unit 206 controls transmission power from the radio communication base station 100, presence / absence of a standby power source for the radio communication base station 100, presence / absence of a redundant configuration, the number of carriers being transmitted, and connection for each carrier The number of calls that are made is recorded in the base station information 207. Here, the carrier means a radio frequency transmitted and received in the radio communication base station 100. The base station information 207 will be described in detail later.

  The main control unit 208 functions as an arithmetic processing unit and a control unit, and controls the overall operation within the radio communication base station 100 according to various programs. In particular, this embodiment has a function of receiving an instruction signal from the management server 105 via the network 103 and shutting down each of the operation unit 212 and the redundant unit 213. The main control unit 208 has a function of switching the switch 209 to select either the commercial power supply 210 or the standby power supply 211.

(4) Configuration of Management Server Next, the configuration of the management server 105 will be described. As shown in FIG. 3, the management server 105 includes a line interface unit 300, a control unit 301, an input unit 302, an output unit 303, a control signal creation unit 304, a power usage rate 305, base station information 306, and a power attenuation base station list. 307, a shutdown base station list 308, and the like.

  The line interface unit 300 is an interface between the network 103 and the control unit 301.

  The control unit 301 is connected to the network 103 via the line interface unit 300 and notifies the radio communication base station 100 of the operation level for each base station. Here, the operation level is information indicating how each radio communication base station 100 is operated in accordance with the power usage rate notified from the server 104 of the power company. For example, as the operation level, the redundant unit 213 is shut down for the radio communication base station 100 according to the power usage rate, the power source is switched from the commercial power source 210 to the standby power source 211, or the carrier is stopped. A level such as attenuating transmission power or shutting down the radio communication base station 100 can be considered. The operation level will be described in detail later.

  The input unit 302 is used when maintenance of the wireless communication base station 100 is performed by a maintenance person. For example, the input unit 302 includes input means for a user to input information such as a mouse, a keyboard, a touch panel, a button, a microphone, a switch, and a lever. It can be illustrated. Further, the output unit 303 has a function of causing the maintenance person to visually recognize the information of the radio communication base station 100, and examples thereof include a display device such as a display device. The control signal creation unit 304 creates information indicating the operation level notified to each radio communication base station 100.

  The power usage rate 305 records the power usage rate received from the server 104 of the power company. The base station information 306 records base station information indicating the configuration of the radio communication base station 100 received from the radio communication base station 100. In the power attenuation base station list 307, the target radio communication base station 100 is registered in advance when an instruction to attenuate the transmission power to the radio communication base station 100 is given. In the shutdown base station list 308, the target wireless communication base station 100 is registered in advance when the wireless communication base station 100 is instructed to shut down.

  Here, with reference to FIG.4 and FIG.5, the operation level and base station information of the radio | wireless communication base station 100 are demonstrated.

  As shown in FIG. 4, the power usage rate and the operation level of the base station are associated with the operation level of the radio communication base station 100. In the present embodiment, the operation level is changed in stages according to the power usage rate.

  For example, when the power usage rate is 80% or more (less than 85%), the operation level is set to the operation level at which the “redundant configuration is shut down” as the first stage of the operation level. In the first stage, the redundant part 213 that is not used except for a failure is shut down, so there is no effect on the service.

  Next, when the power usage rate is 85% or more (less than 90%), the power source of the radio communication base station 100 is “switched to the standby power source” from the commercial power source as the second stage of the operation level. In the second stage, the service is not affected because the used power supply is simply switched. However, since the standby power supply 211 is limited, if the operation level of the second stage is continued for a long time, the radio communication base station 100 is shut down, which affects the service.

  Next, when the power usage rate becomes 90% or more (less than 95%), the carrier of the target wireless communication base station 100 is stopped as the third stage of the operation level. Here, the carrier wave stop means that the service at the radio frequency of the carrier is stopped. For example, it is determined with reference to the base station information 306 whether there is a plurality of carriers in one radio communication base station 100. And about the radio | wireless communication base station 100 in which several carriers exist, some carriers are stopped among several carriers. As a result, the power usage rate can be reduced, but since not all of the plurality of carriers are stopped, the influence on the service is small.

  Details of the base station information 306 will be described here. In the base station information 306, as shown in FIG. 5, configuration information in each radio communication base station 100 is recorded. For example, the configuration of the wireless communication base station A has a standby power supply (battery), no redundant configuration, and the number of carriers is 3. The number of calls is 1000 for the FA1 carrier, 400 for the FA2 carrier, and 400 for the FA3 carrier. There are 50 calls. Similarly, the configuration of the radio communication base station B has no standby power supply (battery), no redundant configuration, and the number of carriers is 2, and the number of calls is 130 calls for the FA1 carrier and 120 calls for the FA2 carrier, respectively. . The configuration of the wireless communication base station C is that there is no standby power supply (battery), there is a redundant configuration, the number of carriers is 1, and the number of calls is 120 calls for each carrier of FA1.

  Returning to FIG. 4, in the above-described third stage of the operation level, some of the carriers of the radio communication base station 100 having a plurality of carriers among the radio communication base stations 100 are stopped. For this reason, the wireless communication base station C having only one carrier is not instructed to change the operation level in the third stage.

  Next, when the power usage rate becomes 95% or more (less than 98%), the transmission power of the target wireless communication base station 100 is attenuated as the fourth stage of the operation level. In the fourth stage, the transmission power of all the radio communication base stations 100 may be attenuated by 50%, or the radio communication base station 100 to be attenuated according to a preset priority may be selected. The control unit 301 of the management server 105 refers to the power attenuation base station list 307 and instructs the radio communication base station 100 to execute the operation level of the fourth stage. For example, the power attenuation base station list 307 may be configured to attenuate the transmission power of the radio communication base station 100 other than the city center or the area with a large number of users. In the fourth stage, it is possible to reduce the power usage rate by attenuating the transmission power of the radio communication base station 100, but the range in which radio waves reach becomes narrower than usual, so that the mobile terminal 101 becomes difficult to connect. There is an impact on services.

  Next, when the power usage rate becomes 98% or more, the target radio communication base station 100 is shut down as the fifth stage of the operation level. In the fifth stage, all the radio communication base stations 100 may be shut down, or the radio communication base station 100 to be shut down may be selected according to a preset priority. The control unit 301 of the management server 105 refers to the shutdown base station list 308 and instructs the radio communication base station 100 to execute the fifth operation level. For example, the shutdown base station list 308 may be set to shut down the radio communication base stations 100 other than the city center and the area with a large number of users. In the fifth stage, the influence on the service becomes large, such as the mobile terminal 101 being disconnected.

  In addition, as described above, for the base station operating in the operation level first to fifth power saving states, the power saving state is recovered according to the degree of recovery of the power usage rate. For example, as shown in FIG. 4, by setting the recovery condition to a threshold 5% lower than the generation condition, the power saving state can be recovered step by step in accordance with the recovery of the power usage rate. Further, by setting the recovery condition of the power saving state to a threshold value lower than the generation condition, when the power usage rate fluctuates near the generation condition threshold value, state transition is not frequently performed.

  Thus, in this Embodiment, before the power usage rate reaches a peak, the operation level of each radio communication base station 100 is changed according to the stage of the power usage rate of the entire radio communication system. As a result, it is possible to reduce the power consumption of the entire wireless communication network and prevent a situation where the power usage rate reaches a peak and a simultaneous power failure occurs. By changing the operation level in stages according to the power usage rate, it is possible to save power in the entire wireless communication network in consideration of the influence on the service.

(5) Details of Operation of Radio Communication System (5-1) Overall Flow of Radio Communication System Next, details of the operation of the radio communication system will be described. As shown in FIG. 6, first, the management server 105 requests information on the current power usage rate from the server 104 of the power company (S101). In step S101, the server 104 of the electric power company requested for the information on the power usage rate from the management server 105 transmits the current power usage rate to the management server 105 (S102).

  In step S102, the management server 105 that has received the current power usage rate determines whether the received power usage rate exceeds 80% (S103). If it is determined in step S103 that the power usage rate exceeds 80%, base station information is requested from the radio communication base station 100 (S104). On the other hand, if it is determined in step S103 that the power usage rate does not exceed 80%, the process ends.

  In step S104, the radio communication base station 100 requested for the base station information from the management server 105 transmits its own base station information recorded in the base station information 207 to the management server 105 (S105). Base station information 207 is configuration information of each wireless communication base station 100 shown in FIG. The management server 105 records the base station information 207 of the plurality of radio communication base stations 100 transmitted in step S105 in the base station information 306.

  Then, the management server 105 determines the operation level (S106). The operation level in step S106 is information indicating the operation method of each radio communication base station 100 according to the power usage rate as described above. The operation level determination process will be described in detail later. Then, the management server 105 notifies the radio communication base station 100 of the operation level determined in step S106 (S107). In step S107, the radio communication base station 100 notified of the operation level from the management server 105 shuts down the redundant unit 213, stops the carrier, attenuates the transmission power, The operation of its own radio communication base station 100 is controlled such as shutting down the station (S108).

(5-2) Operation Level Determination Processing Next, the operation level determination processing in step S106 in FIG. 6 will be described. As shown in FIG. 7, the control unit 301 of the management server 105 (hereinafter simply referred to as the control unit 301) first determines whether the power usage rate is 80% or more and less than 85% (S201). ). When it is determined in step S201 that the power usage rate is 80% or more and less than 85%, the control unit 301 determines whether the wireless communication base station 100 has a redundant configuration (S202). Specifically, the control unit 301 refers to the “redundant configuration” of each wireless communication base station 100 recorded in the base station information 306 and confirms whether the “redundant configuration” is “present” or “not present”.

  In step S202, when it is determined that the radio communication base station 100 has a redundant configuration, the control unit 301 performs the operation level of the first stage in FIG. The wireless communication base station 100 is notified to shut down the redundant unit 213) (S204). For example, in the base station information 306 in FIG. 5, since the radio communication base station C has a “redundant configuration”, a notification is given to shut down the redundant configuration of the radio communication base station C. On the other hand, when it is determined in step S202 that the radio communication base station 100 does not have a redundant configuration, the control unit 301 excludes the radio communication base station 100 from the first level operation level notification target. .

  If it is determined in step S201 that the power usage rate is not 80% or more and less than 85%, the control unit 301 determines whether the power usage rate is 85% or more and less than 90% (S205). When it is determined in step S205 that the power usage rate is 85% or more and less than 90%, the control unit 301 determines whether the wireless communication base station 100 has a spare battery (S206). Specifically, the control unit 301 refers to the “battery” of each wireless communication base station 100 recorded in the base station information 306 and confirms whether the “battery” is “present” or “not present”.

  When it is determined in step S206 that the radio communication base station 100 has a spare battery (standby power source), the control unit 301 determines the operation level at the second stage in FIG. 4, that is, the radio communication base station. The radio communication base station 100 is notified to switch to 100 battery drive (standby power supply) (S208). For example, in the base station information 306 of FIG. 5, since the wireless communication base station A has “battery”, the wireless communication base station A is switched to battery driving. On the other hand, when it is determined in step S206 that the radio communication base station 100 does not have a standby power supply, the control unit 301 excludes the radio communication base station 100 from the second level operation level notification target. To do.

  If it is determined in step S205 that the power usage rate is not 85% or more and less than 90%, the control unit 301 determines whether the power usage rate is 90% or more and less than 95% (S209). When it is determined in step S209 that the power usage rate is 90% or more and less than 95%, the control unit 301 determines whether the number of carriers of the radio communication base station 100 is 2 or more (S210). Specifically, the control unit 301 refers to the “number of carriers” of each radio communication base station 100 in which the base station information 306 is recorded, and confirms whether the “number of carriers” is 2 or more.

  When it is determined in step S210 that the number of carriers of the radio communication base station 100 is 2 or more, the control unit 301 determines whether the minimum number of calls in each carrier of the radio communication base station 100 is less than 100. (S212). Specifically, the control unit 301 refers to the “number of calls” of each radio communication base station 100 in which the base station information 306 is recorded, and confirms the “number of calls” of each carrier. On the other hand, when it is determined in step S210 that the number of carriers of the radio communication base station 100 is only one, the control unit 301 notifies the radio communication base station 100 of the third stage operation level notification target described later. (S211).

  When it is determined in step S212 that the “number of calls” of each carrier is smaller than 100, the control unit 301 is targeted to perform the operation level of the third stage in FIG. The wireless communication base station 100 is notified (S214). For example, in the base station information 306 of FIG. 5, since the wireless communication base station A has a carrier number of 2 or more and the number of FA3 calls is 50, which is smaller than 100, the carrier of FA3 of the wireless communication base station A is stopped. To wave. In this way, power is saved while reducing the influence of the service by stopping the carrier with a small number of calls. In addition, although the radio communication base station B has the number of carriers of 2 or more, since the number of calls of each carrier is 100 or more, the effect of the service becomes large when the carrier suspension is performed. Not implemented. On the other hand, when it is determined in step S212 that the “number of calls” of each carrier is 100 or more, the control unit 301 excludes the wireless communication base station 100 from the notification target of the operation level of the third stage. (S213).

  If it is determined in step S209 that the power usage rate is not 90% or more and less than 95%, the control unit 301 determines whether the power usage rate is 95% or more and less than 98% (S215). If it is determined in step S215 that the power usage rate is 95% or more and less than 98%, the control unit 301 performs the operation level in the fourth stage of FIG. 4, that is, the wireless registered in the base station information 306. The transmission power of the communication base station 100 is attenuated (50%) (S214). As described above, in step S214, the transmission power of all the wireless communication base stations 100 registered in the base station information 207 may be 50%, or wireless communication other than in the city center and areas with a large number of users. The transmission power of the base station 100 may be 50%.

  On the other hand, if it is determined in step S215 that the power usage rate is 98% or more, the control unit 301 controls the fifth level operation level in FIG. 4, that is, the radio registered in the base station information 306. The communication base station 100 is shut down (S217). As described above, in step S217, all the radio communication base stations 100 registered in the base station information 207 may be shut down, or the radio communication base stations 100 other than the city center or the area with a large number of users are shut down. You may make it do.

(5-3) Operation Level Recovery Processing Next, the power usage rate recovered after the operation levels of the first to fifth stages were implemented for each radio communication base station 100 by the operation level determination processing described above. A power saving state recovery process in this case will be described.

  As shown in FIG. 8, first, the management server 105 requests information on the current power usage rate from the server 104 of the power company (S301). In step S301, the server 104 of the electric power company requested for the information on the power usage rate from the management server 105 transmits the current power usage rate to the management server 105 (S302).

  Then, the management server 105 determines whether one of the first to fifth operation levels shown in FIG. 4 is set in the radio communication base station 100 managed by the management server 105 (S303). If it is determined in step S303 that any one of the first to fifth operation levels is set, the management server 105 performs a determination process in step S304 described later. On the other hand, if it is determined in step S303 that none of the first to fifth operation levels has been set, the management server 105 ends the recovery process.

  In step S304, the management server 105 determines whether the power usage rate received in step S302 satisfies the recovery condition of the current operation level (S304). Specifically, as the recovery condition at the operation level, as shown in FIG. 4, a threshold value 5% lower than the occurrence condition is set. For example, the recovery condition of the radio communication base station 100 in which the operation level of the third stage is set is that the power usage rate is less than 85%.

  If it is determined in step S304 that the power usage rate satisfies the recovery condition for the current operation level, the management server 105 sets the operation level one step lower than the currently set operation level to the wireless communication base. The station 100 is notified (S305). In step S305, the radio communication base station 100 notified of the operation level from the management server 105 changes the operation level from the shutdown of the radio communication base station 100 to the attenuation of the transmission power according to the operation level, It controls the operation of its own radio communication base station 100, such as changing the operation level from attenuation to carrier stoppage (S306).

  Next, in the above recovery process, for example, when the operation level is the fourth stage, a case where the power usage rate is 89% and the operation level setting is changed will be described.

  In step S301 described above, the management server 105 requests the power usage rate from the power company server 104, and in step S302, the management server 105 receives that the current power usage rate is 89%.

  In step S303, it is determined that the operation level is set to the fourth stage. Subsequently, in step S304, the management server 105 determines that the power usage rate (89%) received in step S302 is the fourth stage. It is determined whether the recovery condition is satisfied. Since the recovery condition of the operation level in the fourth stage shown in FIG. 4 is when the power usage rate is smaller than 90%, the management server 105 determines that the recovery condition is satisfied. Since it is determined in step S304 that the recovery condition of the fourth stage is satisfied, in step S305, the management server 105 sets the target wireless communication base to set the operation level to the third stage that is one stage lower than the fourth stage. The station 100 is notified (S305). In step S306, according to the operation level notified from the management server 105, the radio communication base station 100 performs the third operation level of the own operation level, that is, the operation of stopping the own carrier (S306).

(6) Effects of the present embodiment As described above, in the wireless communication system according to the present embodiment, the operation of the plurality of wireless communication base stations 100 can be controlled in stages according to the current power usage rate. It becomes possible. As a result, it is possible to reduce the power consumption of the entire wireless communication network and prevent a situation where the power usage rate reaches a peak and a simultaneous power failure occurs. By changing the operation level in stages according to the power usage rate, it is possible to save power in the entire wireless communication network in consideration of the influence on the service.

DESCRIPTION OF SYMBOLS 100 Wireless communication base station 101 Portable terminal 102 Gateway 103 Network 104 Electric power company server 105 Management server 200 Radio signal transmission / reception part 201 Modulation / demodulation processing part 202 Line interface part 203 Base station control part 204 0 system antenna 205 for transmission / reception 1 system antenna 05
206 Transmission Power Control Unit 207 Base Station Information 208 Main Control Unit 209 Switch 210 Commercial Power Supply 211 Standby Power Supply 212 Operation Unit 213 Redundancy Unit 300 Line Interface Unit 301 Control Unit 302 Input Unit 303 Output Unit 304 Control Signal Creation Unit 305 Power Usage Rate 306 Base station information 307 Power attenuation base station list 308 Shutdown base station list

Claims (12)

A management server connected to a plurality of wireless communication base stations via a network,
A receiving unit for receiving information on the power usage rate transmitted from another server;
A control unit that determines an operation level indicating an operation state of the radio communication base station based on the power usage rate, and instructs each radio communication base station to change to the operation level. server. A recording unit that records the operation level information in association with the operation level indicating the operation state of the radio communication base station with the power usage rate,
The management server according to claim 1, wherein the control unit determines the operation level of the radio communication base station corresponding to the power usage rate with reference to the operation level information. The receiving unit receives base station information of the radio communication base station,
The control unit selects the radio communication base station whose operation level is to be changed based on base station information of each radio communication base station, and selects the radio communication base station according to the power usage rate. The management server according to claim 1, wherein the management server instructs to change to an operation level. The base station information of the radio communication base station includes the presence / absence of a redundant configuration of the radio communication base station, the presence / absence of a standby power supply, the number of carriers transmitting, and the number of calls connected to each carrier. The management server according to claim 3. The controller is
The management server according to claim 1, wherein the power usage rate is classified into a predetermined stage, and the operation level of the radio communication base station is determined according to the predetermined stage of the power usage rate. The controller is
Instructing the radio communication base station to block the function of the redundant part of the radio communication base station that is not operated according to a predetermined stage of the power usage rate.
The management server according to claim 5, wherein: The controller is
Instructing the radio communication base station to switch the power source of the radio communication base station from a commercial power source to a standby power source according to a predetermined stage of the power usage rate.
The management server according to claim 5, wherein: The controller is
Instructing the radio communication base station to stop the carrier of the radio communication base station according to a predetermined stage of the power usage rate,
The management server according to claim 5, wherein: The controller is
The radio communication base station is instructed to stop one or more carriers of the radio communication base station when the number of carriers of the radio communication base station is two or more. The management server described in. The controller is
The management server according to claim 5, wherein the wireless communication base station is instructed to attenuate power transmitted from the wireless communication base station according to a predetermined stage of the power usage rate. The controller is
The management server according to claim 5, wherein the wireless communication base station is instructed to shut down the wireless communication base station according to a predetermined stage of the power usage rate. A power saving method using a management server connected to a plurality of wireless communication base stations via a network,
A receiving unit that receives information on a power usage rate transmitted from another server;
A second step in which a control unit determines an operation level indicating an operation state of the radio communication base station based on the power usage rate received in the first step;
A third step in which the control unit instructs each radio communication base station to change to an operation state corresponding to the operation level determined in the second step;
A power saving method comprising:

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