JPH06133351A - Communication control system - Google Patents

Abstract

PURPOSE:To attain sure connection without movement of a mobile station even when a communication traffic is concentrated locally or a fault takes place in a radio base station with respect to the communication control circuit system of mobile communication. CONSTITUTION:A channel management means 12 manages a communication channel used by a communication controller 11 for the communication with a host station such as a radio line control station and a mobile station 100 at present and outputs number of communication channels in use. A transmission power command means, 13 receiving number of channels from the channel management means 12 outputs a decrease command when the channel number is increased and outputs an increase command when the channel number is conversely decreased. An amplifier 5 decreases the amplification factor of the transmission power for a control channel when the decrease command comes from the transmission power command means 13 and increases the amplification factor of the transmission power for the control channel when the increase command comes from the transmission power command means 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication control system, and more particularly to a communication control system for controlling communication between a mobile station and a base station in mobile communication.

In recent years, mobile communication for moving bodies such as automobiles, mobile phones, ships, trains and airplanes has been put into practical use. This mobile communication has an advantage that communication can be performed at an arbitrary location because the location for communication is not specified within a predetermined communicable range. Therefore, in recent years, the usage is rapidly increasing. In particular, the widespread use of car telephones that use radio waves in the 800 MHz band, which was started in 1979, is becoming an indispensable service for the advanced information society.

[0003]

2. Description of the Related Art A conventional communication control system will be described with reference to FIGS. Note that mobile communication includes car phones, mobile phones, ship phones, public pay phones, airplane phones, and the like, but a general car phone will be described for the sake of simplicity.

FIG. 6 is a diagram showing an example of an automobile telephone network. In the figure, a car telephone network is hierarchized into a plurality of layers, and a general station (hereinafter, referred to as "RC") 101, 1 in order from the highest station floor to the lowest station floor.
02, Car Telephone Exchange (hereinafter referred to as "AMC")
111 and 112, wireless channel control stations (hereinafter, referred to as “MCS”) 121 to 124, wireless base stations (hereinafter, “MB”).
Call S ". ) 131-13n, 141-14n, 15
1 to 15n and 161 to 16n. In the figure, in connection between stations, a solid line indicates a communication line (communication channel), a broken line indicates a common line signal line, and an alternate long and short dash line indicates a control line (control channel).

In the figure, as an example of an automobile telephone network, R
AMC111 is connected to C101, and this AMC111
Is connected to MCS121, 122, and MCS1
21 is MBS 131 to 13n, and MCS 122 is M
BSs 141 to 14n are connected. Similarly, RC1
02 is connected to the AMC 112, the AMC 112 is connected to the MCS 123, and the MCS 123 is connected to the MB.
S151 to 15n are connected. In addition, mainly in a small and medium-sized city area, etc., a control line is connected between the AMC 112 and the MCS 124 and between the MCS 124 and the MBS 161 to 16n. AMC112 and MBS161 ~
The telephone line is directly connected to 16n.

The RCs 101 and 102 divide the whole country into predetermined areas in accordance with the out-of-city band system, and relay calls between the own area and other areas. The AMCs 111 and 112 perform connection processing with a general telephone network, mutual connection between car phones, and charging processing for car phone outgoing calls. The MCSs 121 to 124 perform control of wireless lines, commands, and management of wireless line quality, and
It will monitor and control wireless base stations, monitor and control wired lines, and test these lines. MBS 131 to 13n,
141 to 14n, 151 to 15n, 161 to 16n are
It transmits and receives various signals in the wireless section and monitors the wireless channel quality for switching wireless channels.

Here, a mobile body, that is, an automobile provided with wireless communication equipment is called a "mobile station (hereinafter referred to as MSS)", which transmits and receives various signals in a wireless section, switches wireless channels, and sends position registration information. And so on. In addition, MSS
100 and MBS 131 to 13n, 141 to 14n, 1
In communication with 51 to 15n and 161 to 16n, a communication channel for communication and a call and a control channel for transmitting various kinds of digital signals such as an identification number of the MSS 100 and a communication channel number are used. . Further, the control channels include an incoming call control channel for receiving an incoming call and an outgoing call control channel for making an outgoing call.

With the above network configuration, in order to make a call from the MSS 100, a communication connection is established between the stations in the following procedure, for example. First, the MSS 100 outputs a calling signal through the calling control channel. The MBS that has received this calling signal, MBS 14n in the figure, notifies the MCS 122 of the calling signal through the control line. MCS12
2 searches the unused communication channel, and then notifies this channel number to the MBS 14n through the control line,
S14n is the MSS100 through the transmission control channel.
Notify to. After that, a call is made between the MSS 100 and the MBS 14n using the above channel number.

Next, the above MBSs 131 to 13n and 141
˜14n, 151 to 15n, 161 to 16n will be described. FIG. 7 is a diagram showing an example of a zone configuration of mobile communication in the radio base station of the automobile telephone network shown in FIG. In the figure, the zone structure for mobile communication is composed of wireless zones Z1 to Z4. The wireless zones Z1 to Z4 are provided for each MBS, and the zone covered by one MBS is smaller than the service area, and an ideal "small zone" system configuration that is a configuration method in which radio frequencies are repeatedly used is provided. Show. The distance from the center of each of these zones to the furthest point is the "zone radius"
Is about 5 to 15 [Km]. In addition, in order to repeatedly use the radio frequency, each zone has a honeycomb-like hexagonal shape.

An MBS 131 is arranged at the center of the wireless zone Z1. Similarly, wireless zones Z2, Z3, Z4
MBSs 132, 133, and 134 are arranged at the center of each. Each of these MBSs 131 to 134 is provided with several directional antennas for transmission and reception according to location conditions and the like. This directional antenna has the capability of transmitting and receiving radio waves within a range of ± 30 degrees from the central axis, and the electric field strength is proportional to the distance to the −3.5th power. The magnitudes of the transmission radio waves output from the MBSs 131 to 134 are generally equal and constant.

By the way, when the MSS 100 receives a connection request through the incoming control channel, the MSS 100 measures the received electric field strength of the control channels output from the nearby MBS 131 to 134 and selects the strongest MBS among them. I was connected.

Therefore, as shown in the figure, in the case of the MSS 100 located near the boundary between the wireless zones Z2, Z3 and Z4 and within the area of the wireless zone Z3, M
The probability of connecting to the BS 133 is about 70 [%] according to a trial calculation using one model, and the probability of connecting to the MBS 132 and MBS 134 is 10% depending on the direction of the directional antenna.
It was around [%].

[0013]

However, there are a number of other M's.
When there is a local concentration of communication traffic such as SS connecting to MBS 133, or MBS1
When a failure occurs in 33, there is a problem that even if the MSS 100 tries to establish a connection, a call is lost and a communication connection cannot be established.

Further, in the conventional communication control system, the strengths of the transmitted radio waves are equal and constant, so that the MSS 10
There is a problem that communication connection with other MBS cannot be made unless 0 moves.

The present invention has been made in view of the above points, and even when a local concentration of communication traffic or a failure occurs in a radio base station, the mobile station can be reliably operated without moving. An object is to provide a communication control system that can be connected.

[0016]

In order to achieve the above object, the present invention includes a communication control device 11, a channel management means 12, a transmission power command means 13 and an amplifier in a radio base station 10 as shown in FIG. It consists of 15.

The communication control device 11 controls communication with a mobile station 100 and an upper station such as a radio network controller. The channel management means 12 manages the communication channels currently used in the communication control device 11 and outputs the number of the communication channels. The transmission power command means 13 outputs a decrease command when the number of channels increases, and conversely outputs an increase command when the number of channels decreases. The amplifier 15 amplifies the transmission power of the control channel according to the decrease command or the increase command.

[0018]

The channel management means 12 manages the communication channel currently used by the communication control device 11 in communication with the upper station such as the radio network controller and the mobile station 100, and the channel of the communication channel being used. Output a number. The transmission power command means 13 receives the number of channels from the channel management means 12, and outputs a decrease command when the number of channels increases, and conversely outputs an increase command when the number of channels decreases. The amplifier 15 reduces the amplification of the transmission power of the control channel when there is a decrease command from the transmission power command means 13, and increases the amplification of the transmission power of the control channel when there is an increase command.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of the present invention. In the figure, a wireless base station 10 is a communication control device 1
1, channel management means 12, transmission power command means 13, transmitter 14, amplifier 15, receiver 16, antenna sharing device 17 and antenna 18.

The communication control device 11 controls communication with a mobile station 100 and an upper station such as a radio network controller. The channel management unit 12 manages the communication channel currently used in the communication control device 11 and outputs the number of communication channels being used. The transmission power command means 13 is
When the number of channels received from the channel management means 12 increases, a decrease command is output, and conversely, when the number of channels decreases, an increase command is output. The transmitter 14 (TX) is
The control channel data signal or the like sent from the wireless line control station or the like via the communication control device 11 is converted into a transmission signal for wireless communication and output. The amplifier 15 amplifies the transmission power of the control channel according to the decrease command or the increase command. The receiver (RX) 16 converts the received signal for wireless communication sent via the antenna 18 and the antenna sharing device 17 into a data format used by a wireless line control station and outputs the converted signal. The antenna sharing device 17 is a combiner for transmitting and receiving radio waves with one antenna 18. The antenna 18 is, for example, a directional antenna, and several antennas 18 are provided according to site conditions and the like.

The transmitter 14, the amplifier 15 and the receiver 16 are for the control channel, and the radio base station 10
There are as many separate communication channels (not shown) corresponding to the number of available communication channels. The channel management means 12 and the transmission power command means 13 are mainly composed of a processor. Further, the wireless line control stations and the like correspond to the automobile telephone exchange stations (AMC) 111 and 112 or the wireless line control stations (MCS) 121 to 124 shown in FIG.

Next, the operation of the first embodiment will be described. Although mobile communication includes car phones, mobile phones, ship phones, public telephones for trains, airplane phones, etc., a general car phone will be described below to simplify the description.

First, in order to make a call from the mobile station 100 for communication, the communication connection between the stations is established in the following procedure. That is, the mobile station 100 outputs a calling signal through the calling control channel. This calling signal is sent to the antenna 1
The radio base station 10 received at 8 converts the data into a data format used by a radio line control station or the like at the receiver 16 via the antenna sharing device 17, and controls the call line from the communication control device 11 via the control line to the radio line control. Notify the station. The wireless line control station or the like, which is the upper station, searches for an unused communication channel and then notifies the wireless base station 10 of the channel number of the communication channel through the control line. The wireless base station 10 receives the transmission control channel at the communication control device 11, and the transmitter 1
Notify 4. The transmitter 14 converts the channel number into a transmission signal for wireless communication and outputs it. Also, the amplifier 15
After being amplified to a predetermined power by, the mobile station 100 is notified via the transmission control channel via the antenna sharing device 17 and the antenna 18. Then, the mobile station 100 and the radio base station 10 communicate with each other using the channel number.

Further, in order for the mobile station 100 to receive an incoming call and perform communication or the like, the communication connection between the stations is established by the following procedure. That is, the communication control device 11, which has received the calling signal from the wireless line control station or the like through the control line, notifies the transmitter 14. The transmitter 14 converts this calling signal into a transmission signal for wireless communication and outputs it. Further, after being amplified to a predetermined power by the amplifier 15, the mobile station 100 is notified via the antenna sharing device 17 and the antenna 18 through the incoming control channel. When the mobile station 100 receives the call signal, it outputs a corresponding response signal through the incoming control channel. Hereinafter, except that the calling signal is changed to the calling signal and the outgoing control channel is changed to the incoming control channel,
The communication connection is made by the same procedure as in the case of the above-mentioned calling signal, and the communication can be performed.

Thus, the radio base station 10 and the mobile station 100
The communication control device 11 outputs the communication channel used for communication and the like to the channel management means 12 as a channel number. The channel management means 12 receives this channel number, manages the number of communication channels currently used by the wireless base station 10, and outputs the same to the transmission power command means 13. The transmission power command means 13 monitors the number of channels output from the channel management means 12, outputs a decrease command when the number of channels increases, and conversely outputs an increase command when the number of communication channels decreases. .
In response to this decrease command or increase command, the amplifier 15 reduces the amplification of the transmission power of the control channel when there is a decrease command from the transmission power command means 13, and when there is an increase command, the amplifier 15 Increase transmission power amplification.

Therefore, when the transmission power of the control channel of the radio base station 10 decreases, the electric field strength also decreases at a certain distance from the antenna 18, so that the reception electric field strength of the control channel is measured to determine the strongest radio base station. The mobile station 100 selects and connects to a station and selects and connects to another radio base station. Conversely, when the transmission power of the control channel increases, the electric field strength also increases at a certain distance from the antenna 18, so the mobile station 100 selects the wireless base station 10 to connect to it. In this way, when the communication traffic is locally concentrated or a failure occurs in the wireless base station, the transmission power of the control channel is reduced to prevent further concentration of the communication traffic. According to the electric field strength, the mobile station 100 can surely establish a communication connection with any of the nearby radio base stations without moving.

Next, an embodiment for preventing interference of communication channels in the small zone configuration will be described. Figure 2
FIG. 7 is a diagram showing a second embodiment of the present invention. Note that FIG.
The same elements as those of 1 are denoted by the same reference numerals and description thereof will be omitted. Also, since the communication connection procedure between each station is the same, only the points different from the first embodiment will be described.

In the figure, a channel management means 12a receives a channel number output from the communication control device 11 and an interference detection means 21 which will be described later, and receives a communication channel currently used by the wireless base station 20 and a nearby wireless base station. It manages the number of communication channels used in the above, and outputs it to the transmission power command means 13. Interference detection means 2
1 constantly measures the interference amount of an unused communication channel input via the antenna 18 and the antenna sharing device 17, and when the predetermined interference amount is exceeded, the channel number is used as the communication channel being used. Is output. The radio base station 20 is a radio base station including the above-mentioned channel management means 12a and interference detection means 21 in the radio base station 10 of FIG.

First, the interference of communication channels in the small zone configuration will be described. Radio base station 20 and mobile station 10
In recent years, it has been considered that the channel frequency of the communication channel used between 0 and 0 is assigned by the "dynamic channel assignment method (hereinafter, simply referred to as" dynamic method ")". This dynamic method is an allocation method that is contrasted with the “fixed channel allocation method (hereinafter, simply referred to as“ fixed method ”), which allocates a unique frequency to each zone, and allocates communication channels as needed. This is a method that changes with time. Therefore, it has the advantage of being more efficient than the fixed method. However, since the same communication channel is assigned by neighboring radio base stations and the possibility of causing interference increases, control for channel assignment is required. The interference detecting means 21 is means for detecting such interference of the communication channel in advance and preventing the interference.

Next, the operation of the second embodiment will be described. It should be noted that an operation for preventing interference in a car telephone will be described as in the first embodiment.
In this way, the communication channel used for communication and the like between the radio base station 20 and the mobile station 100 is the communication control device 1
1 is output to the channel management means 12a as a channel number. In addition, the interference detection means 21 measures the amount of interference of the unused communication channel input via the antenna 18 and the antenna sharing device 17, and when the amount of interference exceeds a predetermined amount, the communication channel being used is This channel number is output. The channel management means 12a is the communication control device 11
And the channel number output from the interference detection means 21 to manage the number of communication channels currently used by the radio base station 20, and at the same time, the transmission power command means 1
Output to 3. The transmission power command means 13 monitors the number of channels output from the channel management means 12a, outputs a decrease command when the number of channels increases, and conversely outputs an increase command when the number of communication channels decreases. . In response to this decrease command or increase command, the amplifier 15 reduces the amplification of the transmission power of the control channel when there is a decrease command from the transmission power command means 13, and when there is an increase command, the amplifier 15 Increase transmission power amplification.

Therefore, when interference of a communication channel occurs with a plurality of neighboring radio base stations, the communication channel is configured to be managed as the communication channel in use, so that the interference of the communication channel can be prevented. it can. Further, when the number of communication channels in use, including communication channels with interference, increases, it is possible to prevent further concentration of communication traffic by lowering the transmission power of the control channel. According to the electric field strength, the mobile station 100 can surely establish a communication connection with any of the radio base stations without moving.

Next, a method of comprehensively managing a plurality of radio base stations located within a predetermined area will be described. Figure 3
FIG. 7 is a diagram showing a third embodiment of the present invention. In the figure, the communication control system of the present invention shows a traffic control station 3.
0, and the radio base station 5 that the traffic control station 30 controls
, 52, ..., 5n. The radio base stations 51, 52, ..., 5n correspond to the radio base station 10 shown in FIG. 1 or the radio base station 20 shown in FIG.

The traffic control station 30 is an upper station corresponding to the automobile telephone exchange stations (AMCs) 111 and 112 or the wireless circuit control stations (MCS) 121 to 124 shown in FIG. 32 and output control command means 33.

The used channel monitoring means 31 monitors the communication channel used by the plurality of radio base stations 51, 52, ..., 5n and outputs the channel number of this communication channel. The storage means 32 includes a plurality of radio base stations 51, 5
2, ..., 5n, and data such as location conditions are stored. The output control command means 33 includes a channel number output from the used channel monitoring means 31 and a plurality of wireless base stations 51, 52, ..., 5n output from the storage means 32.
According to the data such as the position and the location condition, the decrease command or the increase command is output to at least one of the plurality of wireless base stations 51, 52, ..., 5n.

Next, the operation of the third embodiment will be described. The used channel monitoring means 31 includes a plurality of radio base stations 5
1, 52, ..., 5n receives a channel number of a communication channel which is always used by radio or wire, and outputs this channel number to the output control command means 33. To do. Output control command means 33
, A plurality of radio base stations 51, 52, ..., 5n output from the storage means 32 and data such as position and location conditions of the plurality of radio base stations 51, 52, ... Wireless base stations 51, 52, ...
A decrease command or an increase command is output to at least one of 5n.

For example, if the mobile station 100 is a radio base station 51,
When the wireless base station 51 is located in the zone of the wireless base station 51 in the vicinity of 52 and local communication traffic concentration occurs in the wireless base station 51, the wireless base stations 51, 52 are The channel number is sent to the used channel monitoring means 31. The used channel monitoring means 31 sends this channel number to the output control command means 33. The output control command means 33 refers to data such as the positions and location conditions of the wireless base stations 51 and 52 stored in the storage means 32,
A decrease command is sent to the wireless base station 51, and an increase command is sent to the wireless base station 52.

Therefore, even if the mobile station 100 cannot connect to the radio base station 51 due to the local concentration of communication traffic, the mobile station 100 can connect to the radio base station 52. A communication connection can be established with the wireless base station.

FIG. 4 is a diagram showing a fourth embodiment of the present invention. In the figure, the communication control system of the present invention comprises a traffic control station 40 and radio base stations 51, 52, ..., 5n managed by the traffic control station 40. The radio base stations 51, 52, ..., 5n are the radio base station 10 shown in FIG. 1 or the radio base station 20 shown in FIG.
Equivalent to.

The traffic control station 40 is a higher-level station corresponding to the mobile telephone switching center (AMC) 111, 112 or the wireless circuit control station (MCS) 121-124 shown in FIG. 6, and has a fault detecting means 41 and a storage means 32. And output control command means 42. Since the storage means 32 is the same element as that in FIG. 3, its explanation is omitted.

The fault detecting means 41 is composed of a plurality of radio base stations 5.
Of the radio stations 1, 52, ..., 5n, the faulty radio base station is monitored. The output control command means 42 includes the radio base station notified from the failure detection means 41 and the data such as the position and location condition of the plurality of radio base stations 51, 52, ..., 5n output from the storage means 32. , 5n is output to at least one of the plurality of radio base stations 51, 52, ..., 5n.

Next, the operation of the fourth embodiment will be described. The fault detecting means 41 first sends, for example, a confirmation signal indicating that no fault has occurred through the control line (control channel). The radio base stations 51, 52, ..., 5n that have received this confirmation signal send corresponding response signals to the failure detection means 41. If this response signal is not sent within a predetermined period, or if a response signal indicating the occurrence of a failure is received, the failure detection means 41 determines that a failure has occurred in the corresponding wireless base station, and performs output control. Command means 42
Notify to. The output control command means 42 is the failure detection means 4
, 5n according to the wireless base station notified from 1 and the data of the plurality of wireless base stations 51, 52, ..., 5n output from the storage unit 32. , 52, ..., 5n outputs a decrease command or an increase command to at least one of them.

For example, if the mobile station 100 is a radio base station 51,
When the wireless base station 51 is located within the zone of the wireless base station 51 in the vicinity of 52 and communication is disabled due to a failure in the wireless base station 51, the failure detecting means 41 notifies the wireless base station 51 of the response signal. It determines that a failure has occurred and notifies the output control command means 42. The output control command means 42 is the wireless base stations 51, 5 stored in the storage means 32.
The increase command is sent to the radio base station 52 with reference to the data such as the position and the location condition of No. 2.

Therefore, even if the mobile station 100 cannot make a communication connection with the radio base station 51 due to a local failure, it can make a communication connection with the radio base station 52. A communication connection can be established with the wireless base station.

FIG. 5 is a flow chart showing the processing procedure of the present invention. This flowchart shows the processing procedure of the transmission power command means 13 shown in FIG. 1 or 2. In the figure, the number following S indicates a step number. [S1] The number of used channels is acquired. Specifically, FIG.
Alternatively, in FIG. 2, the number of communication channels currently used by the communication control device 11 or the like is acquired from the channel management means 12. [S2] The transition of communication traffic is determined. That is, it is determined how the number of channels acquired in step S1 has changed. If the number of acquired channels has increased, the process proceeds to step S3, if it has not changed, the process proceeds to step S4, and if it has decreased, the process proceeds to step S5. [S3] Settings are made to reduce the power according to the increased number of channels. [S4] Settings are made to keep the power as it is. [S5] Settings are made to increase the power in accordance with the reduced number of channels. [S6] The power control signal is commanded according to the values set in steps S3 to S5.

In the above description, the transmission power command means 13 is configured to output a command in response to an increase or decrease in the number of communication channels used by the communication control device 11 or the like. Alternatively, the command may be output according to the radio wave propagation environment such as antenna height.

Further, the transmission power command means 13 may be configured to output a command to the amplifier for controlling the transmission power of the communication channel assigned to the mobile station 100, according to the transmission power of the control channel.

By doing so, the transmission power of the control channel or the communication channel can be more optimally controlled according to the geographical condition or the power condition.

[0048]

As described above, according to the present invention, when the channel management means manages the currently used communication channels and outputs the number of channels, the transmission power command means increases the number of used channels. Output decrease command,
Conversely, when the number of used channels decreases, an increase command is output, and the amplifier is configured to amplify the transmission power of the control channel in response to this decrease or increase command. Even when the concentration of radio waves occurs or a failure occurs in the radio base station, it is possible to reliably establish a communication connection with another radio base station.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.

FIG. 5 is a flowchart showing a processing procedure of the present invention.

FIG. 6 is a diagram showing an example of an automobile telephone network.

FIG. 7 is a diagram showing an example of a zone configuration of mobile communication.

[Explanation of symbols]

 10 Radio Base Station (MBS) 11 Communication Control Device 12 Channel Management Means 13 Transmission Power Command Means 14 Transmitter 15 Amplifier 16 Receiver 17 Antenna Sharing Device 18 Antenna 100 Mobile Station (MSS)

Claims (6)

[Claims] 1. A communication control system for controlling communication between a mobile station and a base station, comprising: a communication control device (11) for controlling communication between a mobile station (100) and an upper station such as a radio network controller. A channel management unit (12) that manages the communication channel currently used in the communication control device (11) and outputs the number of channels of the communication channel; and a decrease command when the number of channels increases. Then
Conversely, when the number of channels decreases, a transmission power command unit (13) that outputs an increase command, and an amplifier (15) that amplifies the transmission power of the control channel according to the decrease command or the increase command, A communication control system comprising: a radio base station (10) provided with. 2. The interference for measuring the interference amount of an unused communication channel, and outputting the channel number to the channel management means (12) as the communication channel being used when the interference amount exceeds a predetermined value. The communication control system according to claim 1, further comprising detection means (21). 3. The transmission power command means (13) issues the decrease command or the increase command according to a radio wave propagation environment such as a location condition of a radio base station including the radio base station (10) and an antenna height. The communication control system according to claim 1 or 2, wherein the communication control system is configured to output. 4. The transmission power command means (13) outputs the transmission power of a communication channel assigned to the mobile station (100), the reduction command or the increase command according to the transmission power of a control channel. The communication control system according to claim 1 or 2, wherein the communication control system is configured. 5. A used channel monitoring means (31) for monitoring a communication channel used by a plurality of wireless base stations such as the wireless base station (10) and outputting a channel number of the communication channel, and the wireless communication. A storage unit (32) for storing data such as positions and location conditions of a plurality of wireless base stations such as a base station (10), the channel number, and a plurality of wireless base stations such as the wireless base station (10). Output control command means (33) for outputting the decrease command or the increase command to at least one of a plurality of wireless base stations such as the wireless base station (10) according to data such as position and location conditions. The communication control system according to claim 1 or 2, further comprising a traffic control station (30) comprising: 6. A fault detecting means (41) for detecting a faulty radio base station among a plurality of radio base stations such as the radio base station (10), and a plurality of radio base stations (10) etc. Storage means (32) for storing data such as the position and location condition of the wireless base station, the wireless base station in which the failure has occurred, and the wireless base station (1
0) and the like, and at least one of the plurality of radio base stations such as the radio base station (10) is provided with the decrease command or the increase command according to data such as the positions and location conditions of the plurality of radio base stations. The communication control system according to claim 1 or 2, further comprising a traffic control station (40) provided with output control command means (42) for outputting.