JP4689714B2 - Mobile device, communication control method - Google Patents

Description

The present invention relates to a mobile device relates to a communication control method, and more particularly to the mobile station and communication control method mobile station can detect the moving speed of its own.

Currently, a moving speed of a mobile communication terminal such as a mobile phone (hereinafter referred to as a mobile device) is detected, and the detected moving speed is used for control such as handover. For example, Patent Document 1, Patent Document 2, and Patent Document 3 are known as conventional techniques for detecting the moving speed of a mobile device.
In Patent Document 1, the number of times that switching of the communication cell (Reselection) has occurred in the standby state of the mobile station counted in the mobile station, that has moved faster than the rate at which the mobile station is predetermined by the count value Judgment whether or not.

In Patent Document 2, an acceleration sensor is provided in the mobile device, and the speed of the mobile device, and thus the transportation system on which the mobile device is on board, is specified from the acceleration detected by the acceleration sensor.
In Patent Literature 3, the mobile device analyzes the reception level and fading pitch to determine the moving speed of its own device. At this time, the analysis accuracy is improved by receiving the remaining communication slots other than the communication slots previously set in the own device.
JP 2000-209656 A JP 2003-309653 A JP 2007-174329 A

However, the above-described Patent Document 1 has a problem in that the speed detection accuracy varies depending on the installation density of base stations in the communication area. Further, in an area where the installation density of base stations is low, the number of cell switching per unit time is reduced, and the accuracy of speed detection is reduced.
Moreover, in patent document 2 and patent document 3, the mobile device itself detects the moving speed of its own device. For this reason, in order to use the detected speed for communication control, it is necessary to notify a communication control device (hereinafter referred to as NW device) or the like connected via a network.

As a method for notifying the NW device of the speed detected by the mobile device, for example, it is conceivable to add information on the speed to an existing signal sent from the mobile device to the NW device. Alternatively, it is conceivable to add a new signal for notifying the speed between the mobile device and the NW device.
However, in order to add speed information to an existing signal, it is necessary to change the content, format, and specifications of the existing signal. Also, adding a new signal is not desirable because the number of communications between the mobile device and the NW device increases.
The present invention has been made in view of the above points, and is a mobile device capable of notifying the speed of the own device detected by the mobile device to the NW device side without changing the content or format of an existing signal. , and to provide a communication control method.

In order to solve the above problems, the mobile device according to claim 1 of the present invention measures the radio quality of a new cell, and as a result of the measurement, the radio quality measurement of the new cell satisfies the additional condition of the communication cell. In this case, it is a mobile device (for example , the mobile device 1 shown in FIG. 1) that transmits a signal for reporting the addition of the new cell to the communication control device (for example, the NW device 2 shown in FIG. 1). Based on the moving speed detecting means (for example, the acceleration sensor 106 shown in FIG. 1) for detecting the moving speed of the own device and the moving speed detected by the moving speed detecting means, at least the transmission interval and the number of times of transmission of the signal. transmission condition determining means for determining one (for example transmission interval determination section 108 shown in FIG. 1), by at least one of the transmission interval and the transmission number of times determined by the transmission condition determining means, repeating the signal Serial and multiple transmit signal transmitter to the communications control device (e.g., transmission control section 102 and transmission section 101 shown in FIG. 1), characterized in that it comprises a.
According to such an invention, it is possible to move without changing the content, format, specification, etc. of the signal from the mobile device to the communication control device and without adding a new signal specialized for the notification of the moving speed. The moving speed detected on the machine side can be transmitted to the communication control device.

  According to a second aspect of the present invention, the mobile device according to the first aspect of the present invention is the mobile speed information storing means for storing the moving speed information in which the moving speed is associated with at least one of the transmission interval and the number of transmissions of the signal. (For example, the moving speed information storage unit 109 shown in FIG. 1), and the transmission condition determining means compares the moving speed information with the moving speed detected by the moving speed detecting means and transmits the signal. At least one of the interval and the number of transmissions is determined. According to such an invention, the moving speed of the mobile device can be determined relatively easily from the transmission interval, the number of transmissions, and the like.

  The mobile device according to claim 3 is provided with at least one of a timer for timing a predetermined time and a counter for counting the number of times of transmission of the signal in claim 1 or 2, and the mobile device is repeated until the timing of the timer ends. At least one of a process of transmitting a signal and a process of repeatedly transmitting the signal until the count value of the counter reaches a predetermined number set in advance is performed. According to such an invention, it is possible to appropriately set the signal transmission interval on the mobile device side.

Further , according to the present invention, without changing the content, format, specification, etc. of the signal transmitted from the mobile device, and without adding a new signal specialized for the notification of the moving speed, The communication control device can determine the moving speed detected on the side.

5. The communication control method according to claim 4 , wherein the radio quality of the new cell is measured, and when the radio quality measurement of the new cell satisfies the additional condition of the communication cell as a result of the measurement, the communication control apparatus is informed of the new cell. Is a communication control method executed by a mobile device that transmits a signal for reporting additional transmission, and determines at least one of the signal transmission interval and the number of transmissions based on the moving speed of the own device And a signal transmission step of repeatedly transmitting the signal to the communication control device a plurality of times according to at least one of the transmission interval and the number of transmissions determined in the transmission condition determination step. According to such an invention, it is possible to move without changing the content, format, specification, etc. of the signal from the mobile device to the communication control device and without adding a new signal specialized for the notification of the moving speed. The moving speed detected on the machine side can be transmitted to the communication control device.

Further , according to the present invention, without changing the content, format, specification, etc. of the signal transmitted from the mobile device, and without adding a new signal specialized for the notification of the moving speed, The communication control device can determine the moving speed detected on the side.

According to the present invention described above, since at least one of the number of signal transmissions and the transmission interval is used for notification of the moving speed of the mobile device, the accuracy is not affected by the environment of the base station or the like. In addition, it is detected on the mobile device side without changing the content, format, specifications, etc. of the signal from the mobile device to the communication control device, and without adding a new signal specialized for notification of the moving speed. the moving speed can be transmitted to the communication control apparatus, the mobile station can provide a communication control method.

Hereinafter, a mobile device, a communication control device, and a communication control method according to an embodiment of the present invention will be described with reference to the drawings.
(Constitution)
FIG. 1 is a diagram for explaining the configuration of a mobile device 1 and a communication control device according to the present embodiment. In the present embodiment, the communication control device is connected to a mobile device via a network (NW), and is a control device that controls communication between the mobile device and the base station. In the present embodiment, the communication control device is hereinafter referred to as an NW device.

1.1 Mobile Device The mobile device 1 includes a transmission unit 101 for transmitting and receiving signals to and from the NW device 2, a reception unit 103, a transmission control unit 102 that controls the transmission unit 101, and a reception control unit 104 that controls the reception unit 103. It has. In the above configuration, the mobile device 1 according to the present embodiment transmits and receives existing signals to and from the NW device 2. The existing signal refers to, for example, a radio quality measurement instruction and response in a new cell transmitted from the NW device 2, a new cell addition execution command and response, and the like.

  In addition, the mobile device 1 includes an acceleration sensor 106 and a geomagnetic sensor 107. The acceleration sensor 106 is a sensor that estimates the speed of the mobile device 1 by continuously recording changes in the speed of the mobile device 1. The geomagnetic sensor 107 detects the moving direction of the mobile device 1. The acceleration sensor 106 and the geomagnetic sensor 107 output signals indicating the moving speed and moving state of the mobile device 1.

In addition, the mobile device 1 includes a moving speed determination unit 105. A signal output from the acceleration sensor 106 or the geomagnetic sensor 107 is input to the moving speed determination unit 105. Then, the moving speed of the mobile device 1 on which it is mounted is determined.
In addition, the moving speed determination part 105 of this embodiment is not limited to the structure which detects the moving speed of the mobile device 1 by the acceleration sensor 106 or the geomagnetic sensor 107. For example, a configuration may be adopted in which a signal from the base station is received by the receiving unit 103, a fluctuation in reception level or a phase fluctuation due to fading of the received signal is detected, and a moving speed is detected from the fluctuation state.

Furthermore, the mobile device 1 includes a transmission interval determination unit 108 and a movement speed information storage unit 109. The transmission interval determination unit 108 is configured to determine a signal transmission interval according to the moving speed of the mobile device 1 determined by the moving speed determination unit 105. The transmission interval determination unit 108 controls the transmission unit 101 together with the transmission control unit 102 so that a signal is transmitted at the determined transmission interval. The moving speed information storage unit 109 is a database that stores data (hereinafter also referred to as moving speed information) including the correspondence between the moving speed and the signal transmission interval.
The transmission interval determination unit 108 acquires the movement speed information from the movement speed information storage unit 109 and determines a transmission interval corresponding to the movement speed. This embodiment is characterized in that a signal is repeatedly transmitted, and the transmission interval of the signal is used for notification of the moving speed of the mobile device.

  FIG. 2 is a diagram illustrating travel speed information stored in the travel speed information storage unit 109. According to the illustrated example, the transmission interval determination unit 108 determines the signal transmission interval of the mobile device 1 when the movement speed determination unit 105 determines that the mobile device 1 is moving at a movement speed of 250 km / h or more. Set to 50 ms. Further, when it is determined that the mobile device 1 is moving at a movement speed of less than 30 km / h, the transmission interval is set to 1000 ms.

The transmission interval determination unit 108 of the mobile device 1 compares the movement speed determined by the movement speed determination unit 105 with the movement speed information, and outputs a transmission interval corresponding to the movement speed to the transmission control unit 102.
In addition, this embodiment is not limited to the structure which uses the database illustrated in FIG. 2 as moving speed information. For example, an equation for calculating the signal transmission interval using the speed as a parameter may be used as the moving speed information. When configured in this way, the transmission interval determination unit 108 takes out an arithmetic expression from the movement information storage unit 109, substitutes the movement speed for the movement speed, and calculates the transmission interval.

1.2 NW Device The NW device 2 includes a transmission unit 201 for receiving and transmitting the above-described existing signal with the mobile device 1, a reception unit 203, a transmission control unit 202 for controlling the transmission unit 201, and reception control for controlling the reception unit 203. Unit 204 and reception signal storage unit 205 serving as a buffer for storing signal data received by reception unit 203.
The NW device 2 records the signal reception time when storing the signal data in the reception signal storage unit 205. The signal transmission interval of the mobile device 1 can be obtained as a time interval obtained by subtracting the time when the signal was received for the first time from the time when the same signal retransmitted immediately after it was received in a plurality of signal receptions. . Alternatively, it can also be obtained by using an SFN (System Frame Number) generally provided in the NW device 2.

  The reception time can be recorded, for example, by recording the time when the signal data is stored in the reception control unit 204 or the reception signal storage unit 205. In addition, this embodiment is not limited to the structure which records reception time in this way. That is, the reception time may be recorded by any method as long as the transmission interval of the signal by the mobile device 1 can be accurately determined.

Further, the NW device 2 includes a speed determination unit 206. The speed determination unit 206 determines the moving speed of the mobile device 1 according to the transmission interval of the signal transmitted from the mobile device 1. Similar to the movement speed information storage unit 109, the movement speed information storage unit 207 stores the movement speed information shown in FIG. According to the illustrated example, when the transmission interval of the signal transmitted from the mobile device 1 is 50 ms, the NW device 2 determines that the mobile device 1 is moving at a moving speed of 250 km / h or higher. If the transmission interval is 1000 ms, it is determined that the mobile device 1 is stationary or moving at a speed of less than 30 km / h.
Note that the signal transmission interval of the mobile device 1 is the signal reception interval for the NW device 2, but in this embodiment, the expression is unified to “transmission interval” for the sake of simplicity of explanation.

  Further, the NW device 2 includes a moving speed determination result storage unit 208 and a parameter storage unit 209. The movement speed determination result storage unit 208 is a database that stores the determination result of the movement speed of the speed determination unit 206. The parameter storage unit 209 is a database that stores communication parameters corresponding to the moving speed stored in the moving speed determination result storage unit 208. The parameters of the present embodiment are parameters relating to so-called handover, in which the cell with which the mobile device 1 communicates is switched. Specifically, for example, “Time to Trigger”, “Reporting Range”, and “Hysteresis” are conceivable.

The transmission control unit 202 reads the moving speed of the mobile device 1 from the moving speed determination result storage unit 208, and obtains a parameter optimal for the read moving speed from the parameter storage unit 209. Then, the acquired parameters are sent to the transmission unit 201 and transmitted to the mobile device 1.
According to the present embodiment, the moving speed can be notified from the mobile device to the NW device using the transmission interval of the existing signal transmitted from the mobile device. For this reason, it is not necessary to change the format or specification of an existing signal. Further, it is not necessary to add a signal specialized for notification of the moving speed. Further, information relating to communication between the mobile device and the base station is not used for detecting the moving speed. For this reason, the detection accuracy of the moving speed is not affected by the environment such as the installation density of the base stations.

(Communication control according to movement speed)
Here, communication control between the mobile device and the NW device according to the present embodiment will be specifically described.
3 to 8 illustrate communication control according to the related art and the present embodiment, taking as an example an operation when a communication cell is added by handover.
2.1 Addition of Cell According to Conventional Technology FIG. 3 shows a sequence of operations for adding a conventional cell for comparison with the operation of this embodiment. In FIG. 3, the mobile device is described as MS (Mobile Station).

  In the prior art, the NW device transmits a radio quality measurement instruction 301 for a communication cell (hereinafter referred to as a new cell) around the current communication cell to the mobile device. The mobile device receives the instruction 301 and measures the radio quality of the new cell (step S302). If the wireless quality measurement of the new cell satisfies the communication cell addition condition as a result of the wireless quality measurement (step S303), the mobile station transmits a new cell addition report 304 to the NW device.

  Examples of additional conditions for the communication cell include “Time to Trigger”, “Reporting Range”, and “Hysteresis”. “Time to Trigger”, “Reporting Range”, and “Hysteresis” generate events such as “Event 1a” that is a cell addition event during communication (Cell_DCH) and “Event 1c” that is a cell replacement event It is a parameter that is a condition for this. “Time to Trigger”, “Reporting Range”, and “Hysteresis” are set to prevent unnecessary handover from occurring due to short-term cell level fluctuations. For this reason, the addition report of the cell is made only when such an additional condition is satisfied.

The NW device that has received the addition report executes a cell addition process (step S305). By executing the cell addition process, the NW device transmits a cell addition process execution command 306. The mobile device that has received the execution command 306 adds a new cell and transmits a completion report 307 of the addition process to the NW device.
Here, “Event 1a” and “Event 1c” will be described with reference to FIG. FIG. 4A is a diagram for explaining the occurrence of a new cell addition event (Evant 1a). FIG. 4B is a diagram for explaining the occurrence of a cell switching event (Evant 1c). 4A and 4B, the vertical axis indicates the radio quality level, and the horizontal axis indicates time. CA represents the radio quality of cell A, CB represents the radio quality of cell B, CC represents the radio quality of cell C, and CD represents the radio quality of cell D.
Of the straight lines indicating the relationship between the time of each cell and the signal quality level, the solid line indicates that the cell is an “active cell”, and the broken line indicates that the cell is a “monitor cell”.

“Evant 1a” occurs at the following times: That is, as shown in FIG. 4A, the radio quality of the cell B, which is the “monitor cell” during the radio quality measurement, while the mobile device is communicating with the NW device in the cell A, which is the “active cell”, Assume that the level (RSCP and Pass loss) within the “Reporting Range” of cell A is improved at t1. At this time, if the time set by “Time to Trigger” elapses with Δt1 while the radio quality of the cell B is maintained at this level, the cell addition condition is satisfied.
When the cell addition condition is satisfied, “Event 1a” is transmitted from the mobile device to the NW. The NW device shifts to a cell addition operation upon receiving “Event 1a”, and transmits an execution command for cell addition processing to the mobile device.

As shown in FIG. 4B, “Evant 1c” occurs at the next timing. That is, it is assumed that while the mobile device is communicating with the NW device in cell D, the radio quality of cell C has reached a level higher than the level of cell D plus the level of “Hysteresis”. When the reached level is maintained for the time Δt2 set by “Time to Trigger”, the cell replacement condition is satisfied.
When the cell replacement condition is satisfied, the mobile device transmits “Event 1c” to the NW device. The NW device that has received “Event 1c” shifts to a cell replacement operation and transmits an execution command for cell replacement processing to the mobile device.

2.2 Embodiment FIG. 5 and FIG. 6 are diagrams for explaining a sequence from an operation of adding a cell to notification of a communication parameter according to this embodiment. In the figure, the mobile device is described as MS (Mobile Station).
As shown in FIG. 5, the NW device instructs the mobile device to determine the radio quality of the new cell (step S401). The mobile device receives the instruction 401 and measures the radio quality of the new cell (step S402). When the wireless quality measurement of the new cell satisfies the communication cell addition condition as a result of the wireless quality measurement (step S403), the mobile station transmits a cell addition report based on the moving speed determination result by the moving speed determination unit. The interval is determined (step S404). Then, the cell addition report 406 is transmitted repeatedly at the determined transmission interval (step S405).

The NW device determines the transmission interval while the cell addition report is retransmitted repeatedly (step S407), and executes the cell addition process (step S408). By executing the cell addition process, the NW device transmits a cell addition process execution command 409. The mobile device that has received the execution command 409 adds a new cell and transmits a completion report 410 of the addition process to the NW device. Thereafter, the NW device determines the moving speed.
Here, in the present embodiment, the mobile device is controlled so as to change the frequency at which handover occurs depending on the moving speed of the mobile device.

  Shifting to FIG. 6, the NW device determines the moving speed of the mobile device from the signal transmission interval (step S411), determines the optimum communication parameter for the determined moving speed, and acquires it from the parameter storage unit (step S412). ). The parameter is notified from the transmitter to the mobile device (step S413). For the parameter notification, for example, a message such as “Measurement Control” transmitted from the NW device to the mobile device may be used.

The mobile device receives “Measurement Control” and overwrites the handover-related parameter previously held by the notified parameter (step S414). As a result, the mobile device can execute handover using the acquired parameters.
Such a process enables frequent handovers when the mobile device is moving at a relatively high speed. Further, when the mobile device is stationary or moving at a lower speed, the number of handovers can be suppressed. For this reason, this embodiment can frequently perform handovers only when necessary, while suppressing unnecessary handovers and saving power of the mobile device.

FIG. 7 is a flowchart for explaining an operation performed by the network device in the sequence of FIG. During communication with the mobile device (step S601), the NW device requests the mobile device to measure the radio quality of the new cell (step S602). Then, it is determined whether or not the cell addition report 406 shown in FIG. 5 has been received from the mobile device (step S603). If there is no cell addition report (step S603: No), the NW device repeatedly requests the mobile device to measure a new cell.
When it is determined that a cell addition report has been received from the mobile device (step S603: Yes), the NW device temporarily stores the received cell addition report in the received signal storage unit. At this time, the time when the cell addition report is stored is recorded in, for example, the reception control unit or the reception signal storage unit. The reception control unit determines the transmission interval of the cell addition report from the record.

  In order for the NW device to repeatedly receive the cell addition report and determine the transmission interval, the NW device needs to receive the cell addition report for a certain time or a specific number of times. As a method for this, for example, an RNC (Radio Network Controller) has a timer and receives a cell addition report transmitted from the mobile station until a predetermined time set in the timer elapses (that is, until the timer expires). In step S604, the reception interval can be obtained and set as the transmission interval. Alternatively, the NW device is set to receive a cell addition report transmitted from the mobile device at equal time intervals a predetermined number of times (step S604). The transmission interval can also be determined from the time taken for reception.

As described above, the transmission interval can also be determined using the SFN provided in the NW device.
In the NW device, the moving speed of the mobile device is determined based on the determination result of the transmission interval (reception interval in the NW device) (step S605). The moving speed is stored in the moving speed determination result storage unit in the NW device (step S606).
Further, in the present embodiment, the mobile device may be provided with a counter that counts the number of times of transmission of a timer or cell addition report. Such a method will be described later.

  After receiving the cell addition report from the mobile device a plurality of times, the NW device performs handover processing such as cell addition (step S607). By performing the handover process, transmission of the dedicated CH signal of the new cell is started to communicate with the mobile device (step S608). The execution command for the cell addition process of the NW device is transmitted to the mobile device. The NW device determines whether or not the mobile device response to the execution command has been received (step S609). Then, a handover process command is repeatedly transmitted to the mobile device until a response is received (step S609: No).

  FIG. 8 is a flowchart for explaining processing executed by the mobile device in the sequence shown in FIG. As shown in the figure, the mobile device determines whether or not there is a request for radio quality measurement of a new cell from the NW device during communication with the NW device (step S502). When there is a request (step S502: Yes), a new cell is detected and the radio quality is measured (step S503). Then, the moving speed of the own device is acquired (step S504), and the transmission interval of the cell addition report is determined (step S505). The mobile station transmits a cell addition report to the NW device according to the determined transmission interval (step S506).

  In addition, when the mobile device includes a timer or a counter for setting the transmission time and the number of transmissions of the cell addition report (B), the mobile device has finished counting the time set by a predetermined time in advance, or It is determined whether the count value of the counter has reached the number of transmissions (step S511). If the timer has not yet expired or the count value is less than the number of transmissions (step S511: No), the processing is continued until the timer expires or the count value reaches the number of transmissions (step S511: No).

When the timer expires or the count value reaches the number of transmissions (step S511: Yes), the mobile station stops transmitting the cell addition report (step S512). Then, it is determined whether or not a cell addition command is received from the NW device (step S513). When the command is received (step S513: Yes), processing such as cell addition is executed (step S509).
If the mobile device is configured to include a timer or a counter, the mobile device can appropriately set the transmission interval of signals such as cell addition reports. It should be noted that the transmission interval of the cell addition report transmitted to the NW device is determined on the NW device side using a timer, a counter, or SFN.

  On the other hand, when the mobile device does not include a timer or a counter (A), the mobile device determines whether or not the cell addition execution command 409 shown in FIG. 5 has been received from the NW device (step S507). As a result of the determination, if the execution command has not been received (step S507: No), the cell addition report is continuously performed (step S514). On the other hand, when the execution command is received (step S507: Yes), the mobile station stops reporting the cell addition (step S508) and executes the new cell addition (step S509). Then, a cell addition completion report is transmitted to the NW device (step S510).

  The embodiment described above is not limited to the above configuration. That is, in the present embodiment, the moving speed of the mobile device is notified to the NW device using the transmission interval of the cell addition execution command. However, the present embodiment is not limited to using the cell addition report, but is a signal related to handover, and before the NW device notifies the mobile device of the parameters, the mobile device to the NW device. Any signal may be used as long as it is a signal to be transmitted. Specifically, for example, a signal that the mobile device reports cell switching to the NW device can be considered.

Moreover, this embodiment demonstrated the structure which notifies a moving speed to a NW apparatus using the transmission interval of a signal. However, the present embodiment is not limited to the signal transmission interval, and the same effect can be obtained even if the movement speed is notified using the number of signal transmissions.
Furthermore, this embodiment may notify the moving speed of the mobile device using the number of transmissions together with the signal transmission interval. If it does in this way, the variation showing the moving speed of a mobile machine can be increased and the moving speed of a wide range can be notified.

It is a figure for demonstrating the structure of the mobile apparatus and communication control apparatus of one Embodiment of this invention. It is the figure which illustrated the moving speed information preserve | saved at the moving speed information storage part shown in FIG. It is the figure shown in order to compare the sequence of the operation | movement which adds the conventional cell with the operation | movement of one Embodiment of this invention. It is a figure for demonstrating the event regarding the handover of one Embodiment of this invention. It is a figure for demonstrating the sequence of the operation | movement which adds the cell of this embodiment. It is another figure for demonstrating the communication parameter notification sequence of this embodiment. 6 is a flowchart for explaining an operation executed by the NW device in the sequence of FIG. 5. It is a flowchart for demonstrating the process which a mobile apparatus performs in the sequence of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Transmission part 102 Transmission control part 103 Reception part 104 Reception control part 105 Movement speed determination part 106 Acceleration sensor 107 Geomagnetic sensor 108 Transmission interval determination part 109 Movement speed information storage part 201 Transmission part 202 Transmission control part 203 Reception part 204 Reception control part 205 Received Signal Storage Unit 206 Speed Determination Unit 207 Movement Speed Information Storage Unit 208 Movement Speed Determination Result Storage Unit 209 Parameter Storage Unit

Claims (4)

Measure the radio quality of the new cell, and if the measurement results indicate that the radio quality measurement of the new cell satisfies the conditions for adding a communication cell , send a signal for reporting the addition of the new cell to the communication control device A mobile machine that
A moving speed detecting means for detecting the moving speed of the own machine;
Transmission condition determining means for determining at least one of the transmission interval and the number of transmissions of the signal based on the moving speed detected by the moving speed detecting means;
Signal transmission means for repeatedly transmitting the signal to the communication control device a plurality of times by at least one of the transmission interval and the number of transmissions determined by the transmission condition determining means;
A mobile device comprising: A moving speed information storing means for storing moving speed information that associates the moving speed with at least one of the transmission interval and the number of transmissions of the signal;
The transmission condition determining means includes
The mobile device according to claim 1, wherein the moving speed information is compared with the moving speed detected by the moving speed detecting means to determine at least one of the transmission interval and the number of transmissions of the signal.   At least one of a timer that counts a predetermined time and a counter that counts the number of transmissions of the signal is provided, and the process of repeatedly transmitting the signal until the timing of the timer is completed, and the count value of the counter is preset. The mobile device according to claim 1, wherein at least one of the processes of repeatedly transmitting the signal is executed until a predetermined number is reached. Measure the radio quality of the new cell, and if the measurement results indicate that the radio quality measurement of the new cell satisfies the conditions for adding a communication cell, send a signal for reporting the addition of the new cell to the communication control device A communication control method executed by a mobile device
  A transmission condition determining step for determining at least one of the transmission interval and the number of transmissions of the signal based on the moving speed of the own device;
  A signal transmission step of repeatedly transmitting the signal to the communication control device a plurality of times by at least one of the transmission interval and the number of transmissions determined in the transmission condition determination step;
  The communication control method characterized by including.

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