JP2014072743A - Apparatus for estimating number of wirelessly connected terminals, method for estimating number of wirelessly connected terminals and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To estimate how many terminals of base stations are connected with respect to a priority ratio.SOLUTION: An apparatus for estimating the number of wirelessly connected terminals comprises: a terminal group calculation section 21 for calculating a first terminal number of terminals to be connected to a first radio communication device of a first radio frequency band regarding terminals being connected to the first radio communication device, and a second terminal number of terminals which can be connected to a second radio communication device of a second radio frequency band; a terminal shift count calculation section 22 which uses a priority ratio of the first radio frequency band or the second radio frequency band and the second terminal number to calculate a third terminal number of terminals of which the connections to the first radio communication device are left and a fourth terminal number of terminals of which the connections shift to the second radio communication device; and an estimated connection count calculation section 23 which calculates an estimated number of terminals connected to the first radio communication device on the basis of the first terminal number, the third terminal number and the fourth terminal number calculated for the second radio communication device.

Description

  The present invention relates to a wireless connection terminal number estimation device, a wireless connection terminal number estimation method, and a computer program.

  As one of Mobility Load Balancing (MLB) technology that distributes load in a wireless communication system, priority is given to any one of a plurality of radio frequency bands when a communication standby terminal starts communication. There is known a method of setting a priority ratio that represents a ratio of whether to use the information (for example, see Non-Patent Documents 1 and 2). According to this method, when a terminal in a communication standby state starts communication, a radio frequency band to be used is selected from a plurality of radio frequency bands according to the priority ratio. The number of terminals used can be adjusted between radio frequency bands. The priority ratio is notified to the terminal as “CellReselectionPriority”.

3GPP standardization, “Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode (Release 10),” 3GPP TS 36.304 V10.5.0, Mar. 2012. 3GPP standardization, “Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification (Release 10),” 3GPP TS 36.331 V10.6.0, Jun. 2012.

  In the above-described conventional mobility load distribution technique, the number of used terminals can be adjusted among a plurality of radio frequency bands according to the priority ratio. However, there are the following problems.

  Here, it is assumed that one base station uses one radio frequency band. Further, it is assumed that the base station using the 1.5 GHz band and the base station using the 800 MHz band form overlapping cells. At this time, if the priority ratio is set to 1: 1, it can be expected that the same number of terminals are connected to the 1.5 GHz band base station and the 800 MHz band base station. Here, it is assumed that two 1.5 GHz band base stations that form cells overlapping the 800 MHz band base station cell are installed. In this case, if the priority ratio is set to 1: 1, it can be expected that the number of terminals used in the 1.5 GHz band and the 800 MHz band will be the same. However, the number of terminals used in the 1.5 GHz band is the same for two base stations. Since it is distributed, the number of connected terminals cannot be expected to be the same between three base stations (two 1.5 GHz bands and one 800 MHz band). For this reason, in order to adjust the number of connected terminals among a plurality of base stations according to the priority ratio, it is an issue to estimate how many connected terminals of the base station are with respect to the priority ratio.

  The present invention has been made in view of such circumstances, and the number of wireless connection terminal estimation devices and the number of wireless connection terminals that can estimate how many connection terminals of a base station are relative to the priority ratio. It is an object to provide an estimation method and a computer program.

  In order to solve the above-described problem, a wireless connection terminal number estimation device according to the present invention relates to a terminal connected to a first wireless communication device that performs wireless communication with a plurality of terminals in a first wireless frequency band. A number of terminals connected to the first wireless communication device (first number of terminals), and a second wireless communication with a plurality of terminals in a second wireless frequency band different from the first wireless frequency band A terminal group calculation unit that calculates the number of terminals that can be connected to the wireless communication device (second terminal number), and the terminal selects either the first radio frequency band or the second radio frequency band. Using the priority ratio indicating whether to connect to the wireless communication device with priority and the second terminal number, the number of terminals remaining in the first wireless communication device (third terminal number), A terminal whose connection transits from the first wireless communication device to the second wireless communication device A terminal transition number calculation unit for calculating a number (fourth terminal number), the first terminal number, the third terminal number, and a fourth terminal number (from the second wireless communication device to An estimated connection number calculating unit that calculates the estimated number of connections of the terminal connected to the first wireless communication device based on the number of terminals whose connection transits to the first wireless communication device). And

  In the wireless connection terminal number estimation device according to the present invention, the terminal group calculation unit, based on received power information about each of the first wireless communication device and the second wireless communication device of each terminal, The first terminal and the second terminal are determined.

  In the wireless connection terminal number estimation apparatus according to the present invention, the terminal group calculation unit updates the second number of terminals based on the calculated estimated connection number.

  The wireless connection terminal number estimation method according to the present invention connects a terminal connected to a first wireless communication apparatus that performs wireless communication with a plurality of terminals in a first wireless frequency band to the first wireless communication apparatus. And the number of terminals that can be connected to a second radio communication device that performs radio communication with a plurality of terminals in a second radio frequency band different from the first radio frequency band. A terminal group calculating step for calculating (second number of terminals), and the terminal preferentially connects to the radio communication apparatus in either the first radio frequency band or the second radio frequency band. And the second terminal number, the number of terminals remaining in the first wireless communication device (the number of third terminals), and the first wireless communication device from the first wireless communication device The number of terminals to which the connection transitions to the second wireless communication device (fourth terminal number); Calculating the number of terminal transitions to be calculated, the number of the first terminals, the number of the third terminals, and the number of the fourth terminals (connection transition from the second wireless communication apparatus to the first wireless communication apparatus) And an estimated connection number calculating step of calculating an estimated connection number of terminals connected to the first wireless communication device based on the number of terminals to be connected).

  The wireless connection terminal number estimation method according to the present invention connects a terminal connected to a first wireless communication apparatus that performs wireless communication with a plurality of terminals in a first wireless frequency band to the first wireless communication apparatus. And the number of terminals that can be connected to a second radio communication device that performs radio communication with a plurality of terminals in a second radio frequency band different from the first radio frequency band. A terminal group calculating step for calculating (second number of terminals), and the terminal preferentially connects to the radio communication apparatus in either the first radio frequency band or the second radio frequency band. And the second terminal number, the number of terminals remaining in the first wireless communication device (the number of third terminals), and the first wireless communication device from the first wireless communication device The number of terminals to which the connection transitions to the second wireless communication device (fourth terminal number); Calculating the number of terminal transitions to be calculated, the number of the first terminals, the number of the third terminals, and the number of the fourth terminals (connection transition from the second wireless communication apparatus to the first wireless communication apparatus) A computer program for causing a computer to execute an estimated connection number calculating step of calculating an estimated connection number of terminals connected to the first wireless communication device based on the number of terminals to be connected) .

  According to the present invention, it is possible to estimate the number of connected terminals of the base station with respect to the priority ratio.

It is a schematic diagram which shows the structural example of the radio | wireless communications system which concerns on one Embodiment of this invention. It is a block diagram which shows the structural example of the wireless connection terminal number estimation apparatus 1 shown in FIG. It is a flowchart of Example 1 of the wireless connection terminal number estimation process which concerns on this invention. It is a conceptual diagram for demonstrating the radio | wireless connection terminal number estimation method which concerns on this invention. It is another conceptual diagram for demonstrating the radio | wireless connection terminal number estimation method which concerns on this invention. It is a flowchart of Example 2 of the wireless connection terminal number estimation process which concerns on this invention. It is a structural example of the base station which concerns on one Embodiment of this invention. It is a structural example of the base station which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic diagram illustrating a configuration example of a wireless communication system according to an embodiment of the present invention. In FIG. 1, the wireless connection terminal number estimation device 1 is installed in a base station management center 5. The base station management center 5 transmits and receives data to and from the base stations 2A and 2B via the communication network 4. The base station 2A uses a 1.5 GHz band as a radio frequency band. The base station 2B uses the 800 MHz band as a radio frequency band. In the present embodiment, for convenience of explanation, it is assumed that 1.5 GHz band and 800 MHz band are used as examples of the radio frequency band.

  In the configuration example of FIG. 1, two base stations 2A and one base station 2B form overlapping cells. The terminal 3 can use both the 1.5 GHz band and the 800 MHz band as the radio frequency band. When starting communication from the communication standby state, the terminal 3 selects either the 1.5 GHz band or the 800 MHz band depending on the priority ratio. And use it. The priority ratio is set for each base station from the base station management center 5 and is set for the terminal 3 from the connected base station.

  FIG. 2 is a block diagram showing a configuration example of the wireless connection terminal number estimation apparatus 1 shown in FIG. In FIG. 2, the wireless connection terminal number estimation device 1 includes an input unit 11, an output unit 12, a storage unit 13, and a processing unit 14. The processing unit 14 includes a terminal group calculation unit 21, a terminal transition number calculation unit 22, and an estimated connection number calculation unit 23. The input unit 11 inputs data. The output unit 12 outputs data. The storage unit 13 stores data. The processing unit 14 performs wireless connection terminal number estimation processing. Each part 11, 12, 13, 14 is connected so that data can be transmitted and received.

  The processing unit 14 may be realized by hardware, or is configured by a memory and a CPU (central processing unit), and the CPU executes a program for realizing the function of the processing unit 14. The function may be realized by. When the processing unit 14 includes a CPU, the data held in the storage unit 13 includes a program executed by the CPU.

  Hereinafter, the wireless connection terminal number estimation processing performed by the wireless connection terminal number estimation apparatus 1 according to the present embodiment will be described with reference to examples.

  FIG. 3 is a flowchart of Embodiment 1 of the wireless connection terminal number estimation processing according to the present invention. With reference to FIG. 3, the operation of the wireless connection terminal number estimation apparatus 1 according to the first embodiment will be described.

(Step S1)
The input unit 11 acquires input information. The input information includes reception power information, reception power threshold information, and priority ratio information. The received power information is information indicating the received power of the radio wave received by the terminal 3 from each of the base stations 2A and 2B, and exists for each terminal 3 for each base station and for each radio frequency band. As the received power information, for example, from the terminal 3 in “Measurement report” defined by 3GPP (Third Generation Partnership Project) standard “Evolved Universal Terrestrial Radio Access (E-UTRA)” (see Non-Patent Documents 1 and 2). Reported received power information (RSRP (Reference Signal Received Power) or RSRQ (Reference Signal Received Quality)) can be used.

  The reception power threshold information is information indicating the reception power threshold. The priority ratio information is information indicating the priority ratio set for each of the base stations 2A and 2B.

(Step S2)
The terminal group calculation unit 21 determines the terminal group using the received power information and the received power threshold information, and calculates the number of terminals for each determined terminal group (terminal group calculation process). This terminal group calculation method will be described with reference to FIG. In the example of FIG. 4, cell A of one base station 2A (1.5 GHz band) and cell B of one base station 2B (800 MHz band) are shown. Cell A and cell B are formed overlappingly.

Terminal 3 connected to the base station 2A (1.5 GHz band) (in FIG. 4, the terminal 3 which is located in the cell A) is a terminal group _{Y A} to connect to the base station 2A, the base station 2B It can be classified into the terminal group _XAB that can be connected. Terminal group _{Y A} is composed of the terminal 3 that received power of the base station 2B (800 MHz band) is lower than the received power threshold. When there is the terminal 3 not corresponding to the 800MHz band in the terminal 3 connected to the base station 2A (1.5 GHz band), the terminal 3 is included in the terminal group _{Y A.} Terminal group Y _A are those considered independently connected to the base station 2A and the priority ratio. The terminal group _XAB is composed of terminals 3 whose received power of the base station 2B (800 MHz band) satisfies the received power threshold. The terminal group _XAB is considered to be connected to the base station 2B when the priority ratio is higher in the 800 MHz band than in the 1.5 GHz band.

Similarly, the terminal 3 connected to the base station 2B (800 MHz band) (in FIG. 4, the terminal 3 which is located in the cell B) is a terminal group _{Y B} is connected to the base station 2B, the base station 2A Can be classified into a terminal group _XBA that can be connected to The terminal group Y _B is composed of terminals 3 whose received power of the base station 2A (1.5 GHz band) is below the received power threshold. When there is the terminal 3 not corresponding to 1.5GHz band in the terminal 3 connected to the base station 2B (800 MHz band), the terminal 3 is included in the terminal group _{Y B.} Terminal group Y _B is to be considered independently connected to the base station 2B is a priority ratio. The terminal group _XBA is composed of terminals 3 whose received power of the base station 2A (1.5 GHz band) satisfies the received power threshold. The terminal group _XBA is considered to be connected to the base station 2A when the priority ratio is higher in the 1.5 GHz band than in the 800 MHz band.

  The terminal group calculation unit 21 compares the received power from the base stations 2A and 2B with a received power threshold for a certain terminal 3, and determines the terminal group to which the terminal 3 belongs based on the comparison result. Next, the terminal group calculation unit 21 calculates the number of terminals 3 belonging to each terminal group.

  Note that the terminal group calculation unit 21 may perform a terminal group calculation process for each input timing of received power information, or perform a received power statistical process for each input of received power information a predetermined number of times. You may perform a terminal group calculation process using a process result.

(Step S3)
The terminal transition number calculation unit 22 uses the terminal group information and priority ratio information of each base station to determine the number of terminals that remain connected to a certain base station, and the number of terminals whose connection transitions from the base station to another base station. Calculate the number. This terminal transition number calculation method will be described with reference to the example of FIG. In the example of FIG. 4, using the priority ratio _{R B} for preferential ratio _{R A} and base station 2B for the base station 2A. Here, it is assumed that the priority ratios R _A and R _B represent the probability of selecting the 1.5 GHz band. Therefore, the priority ratio _{R A} terminal is set 3 selects the 1.5GHz band at a probability of _{R A,} selects the 800MHz band with a probability of _{(1-R A).} Similarly, the priority ratio _{R B} terminal is set 3 selects the 1.5GHz band at a probability of _{R B,} selects a 800MHz band with a probability of _{(1-R B).}

The terminal transition number calculation unit 22 uses the terminal group information of the base station 2A and the priority ratio _RA to calculate the number of terminals whose connection is transitioned from the base station 2A to the base station 2B (the number of transition terminals) using the following equation. .
The number of transition terminals of the base station 2A = “the number of terminals belonging to the terminal group X _AB ” × (1-R _A )

Further, the terminal transition number calculation unit 22 calculates the number of terminals (remaining terminal number) that remain connected to the base station 2A using the terminal group information of the base station 2A and the priority ratio _RA by the following equation.
Number of remaining terminals of base station 2A = “number of terminals belonging to terminal group X _AB ” × R _A + “number of terminals belonging to terminal group Y _A ”

The terminal transition number calculating section 22, using the terminal group information and the priority ratio R _B of the base station 2B, the number of terminals connected to the base station 2A is shifted from the base station 2B (the number of transitions terminal) by the following equation calculate.
Number of transition terminals of base station 2B = “number of terminals belonging to terminal group X _BA ” × R _B

The terminal transition number calculating unit 22 uses the terminal group information of the base station 2B priority ratio R _B, the number of terminals connected remains base station 2B (the number of remaining terminal) is calculated by the following equation.
Number of remaining terminals of base station 2B = “number of terminals belonging to terminal group X _BA ” × (1−R _B ) + “number of terminals belonging to terminal group Y _B ”

(Step S4)
The estimated number-of-connections calculation unit 23 calculates the estimated number of connections of terminals connected to each base station using the number of transition terminals and the number of remaining terminals of each base station. This estimated connection number calculation method will be described with reference to the example of FIG. The estimated connection number calculation unit 23 calculates the estimated connection number of the base station 2A by the following equation.
Estimated number of connections of base station 2A = “number of remaining terminals of base station 2A” + “number of transition terminals of base station 2B”

Further, the estimated connection number calculating unit 23 calculates the estimated number of connections of the base station 2B by the following equation.
Estimated number of connections of base station 2B = “number of remaining terminals of base station 2B” + “number of transition terminals of base station 2A”

(Step S5)
The output unit 12 outputs the estimated number of connections of each base station.

  Note that the wireless connection terminal number estimation process may be performed for all input priority ratios, or may be performed for only a specified priority ratio.

  Further, in the above-described embodiment, the example of FIG. 4 is used and two base stations 2A and 2B that use two radio frequency bands (1.5 GHz band and 800 MHz band), respectively, are targeted. It is equally possible to target a radio frequency band or more than two base stations.

For example, in the example of FIG. 5, cell A of one base station 2A (1.5 GHz band) and cells B, C, and D of three base stations 2B (800 MHz band) are shown. Cell A and cells B, C, and D are formed overlappingly. Terminals 3 (not shown) connected to the base station 2A (cell A) can be classified into terminal groups Y _A , X _AB , X _AC , and X _AD .

Terminal group _{Y A} is composed of the terminal 3 connected to the base station 2A (cell A). Terminal group _{Y A} is composed of the terminal 3 which the received power of the 800MHz band is below the received power threshold. When there is the terminal 3 not corresponding to the 800MHz band in the terminal 3 connected to the base station 2A is the terminal 3 is included in the terminal group Y _A. Terminal group Y _A are those considered independently connected to the base station 2A and the priority ratio.

The terminal group _XAB is composed of the terminals 3 that can be connected to the base station 2B (cell B) and the base station 2B (cell C) and have a higher received power in the cell B than in the cell C. The terminal group _XAB is considered to be connected to the base station 2B (cell B) when the priority ratio is higher in the 800 MHz band than in the 1.5 GHz band.

The terminal group _XAC is composed of terminals 3 having a higher received power in the cell C than in the cell B among the terminals 3 that can be connected to the base station 2B (cell B) and the base station 2B (cell C). The terminal group _XAC is considered to be connected to the base station 2B (cell C) when the priority ratio is higher in the 800 MHz band than in the 1.5 GHz band.

The terminal group _XAD is composed of terminals 3 that can be connected to the base station 2B (cell D). The terminal group _XAD is considered to be connected to the base station 2B (cell D) when the priority ratio is higher in the 800 MHz band than in the 1.5 GHz band.

A terminal 3 (not shown) connected to the base station 2B (cell B) includes a terminal group Y _B connected to the base station 2B (cell B) and a terminal group X connected to the base station 2A (cell A). _It can be classified into _BA . The terminal group Y _B is composed of terminals 3 whose received power of the base station 2A (1.5 GHz band) is below the received power threshold. When there is the terminal 3 not corresponding to 1.5GHz band in the terminal 3 connected to the base station 2B (cell B) is the terminal 3 is included in the terminal group Y _B. The terminal group Y _B is considered to be connected to the base station 2B (cell B) regardless of the priority ratio.

The terminal group _XBA is composed of terminals 3 whose received power of the base station 2A (1.5 GHz band) satisfies the received power threshold. The terminal group _XBA is considered to be connected to the base station 2A when the priority ratio is higher in the 1.5 GHz band than in the 800 MHz band.

Terminal connected to the base station 2B (cell C) 3 (not shown), a terminal group Y _C to connect to the base station 2B (cell C), the terminal group can be connected to the base station 2A (cell A) X Can be classified into _CA. Terminal group _{Y C} is composed of the terminal 3 that received power of the base station 2A (1.5 GHz band) is lower than the received power threshold. When there is the terminal 3 not corresponding to 1.5GHz band in the terminal 3 connected to the base station 2B (cell C) is the terminal 3 is included in the terminal group Y _C. Terminal group Y _C are those believed to be connected to the independent base station 2B (cell C) the priority ratio.

The terminal group _XCA is composed of terminals 3 whose received power of the base station 2A (1.5 GHz band) satisfies the received power threshold. The terminal group _XCA is considered to be connected to the base station 2A when the priority ratio is higher in the 1.5 GHz band than in the 800 MHz band.

A terminal 3 (not shown) connected to the base station 2B (cell D) includes a terminal group Y _D connected to the base station 2B (cell D) and a terminal group X _DA connectable to the base station 2A of the cell A And can be classified. Terminal group _{Y D} is composed of the terminal 3 that received power of the base station 2A (1.5 GHz band) is lower than the received power threshold. When there is the terminal 3 not corresponding to 1.5GHz band in the terminal 3 connected to the base station 2B (cell D) is the terminal 3 is included in the terminal group Y _D. Terminal group Y _D are those believed to be connected to the independent base station 2B (cell D) is a priority ratio.

The terminal group _XDA is composed of terminals 3 whose received power of the base station 2A (1.5 GHz band) satisfies the received power threshold. The terminal group _XDA is considered to be connected to the base station 2A when the priority ratio is higher in the 1.5 GHz band than in the 800 MHz band.

Then, the priority ratio _{R A} and, a priority ratio _{R B} for the base station 2B (cell B), preference ratio _{R C} and base station 2B (cell D to the base station 2B (cell C) to the base station 2A (cell A) ) And a priority ratio _RD . The priority ratios R _A , R _B , R _C , and R _D are assumed to represent the probability of selecting the 1.5 GHz band. Thereby, the estimated connection number of each base station 2A, 2B is represented by the following formula | equation.

Estimated number of connections of base station 2A (cell A) = “total number of terminals belonging to terminal group X _AB , terminals belonging to terminal group X _AC , and terminals belonging to terminal group X _AD ” × R _A + “terminal group Y _A “Number of terminals” + “Number of terminals belonging to terminal group X _BA ” × R _B + “Number of terminals belonging to terminal group X _CA ” × R _C + “Number of terminals belonging to terminal group X _DA ” × R _D

Estimated number of connections of base station 2B (cell B) = “number of terminals belonging to terminal group X _BA ” × (1−R _B ) + “number of terminals belonging to terminal group Y _B ” + “belonging to terminal group X _AB Number of terminals "x (1-R _A )

Estimated number of connections of base station 2B (cell C) = “number of terminals belonging to terminal group X _CA ” × (1-R _C ) + “number of terminals belonging to terminal group Y _C ” + “terminal group X _AC Number of terminals "x (1-R _A )

Estimated number of connections of base station 2B (cell D) = “number of terminals belonging to terminal group X _DA ” × (1-R _D ) + “number of terminals belonging to terminal group Y _D ” + “terminal group belonging to terminal group X _AD Number of terminals "x (1-R _A )

  FIG. 6 is a flowchart of Embodiment 2 of the wireless connection terminal number estimation processing according to the present invention. With reference to FIG. 6, the operation of the wireless connection terminal number estimation apparatus 1 according to the second embodiment will be described. In FIG. 6, portions corresponding to the respective steps in FIG. Hereinafter, differences from the first embodiment shown in FIG. 3 will be mainly described.

  In the second embodiment, the terminal transition number calculation process (step S3) and the estimated connection number calculation process (step S4) are performed again using the estimated connection number calculated in step S4. The terminal transition number calculation process and the estimated connection number calculation process are repeated until a predetermined end condition is satisfied in step S10. As the termination condition, it is possible to define the number of repetitions, or to define that the amount of change in the estimated number of connections is less than a certain amount.

  In step S3a, when the estimated number of connections calculated in step S4 is used, the estimated number of connections of a certain base station is set as the total number of terminals 3 connected to the base station. Then, a difference obtained by subtracting the number of terminals belonging to the terminal group Y connected to the base station from the total number is set as the number of terminals belonging to the terminal group X that can be connected to other base stations. Then, the priority ratio R is applied to the “number of terminals belonging to the terminal group X” as a result of the update, as in the first embodiment.

  According to the above-described embodiment, it is possible to estimate the number of connected terminals of the base station with respect to the priority ratio. Thereby, it can contribute to adjusting the number of connected terminals among a plurality of base stations according to the priority ratio.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the specific structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  For example, in the above-described embodiment, it is assumed that one base station 2A, 2B includes one wireless communication device 40A, 40B using one radio frequency band as shown in FIG. 7, but as shown in FIG. One base station 2AB may include a plurality of radio communication devices 40A and 40B that use one radio frequency band. When one base station 2AB includes a plurality of radio communication devices 40A and 40B that use one radio frequency band as shown in FIG. 8, by applying the present invention, the estimated number of connections is set for each radio communication device 40A and 40B. Can be calculated.

  Further, a program for realizing each step shown in FIG. 3 or FIG. 6 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed, thereby enabling wireless communication. You may perform a connection terminal number estimation process. Here, the “computer system” may include an OS and hardware such as peripheral devices.

  “Computer-readable recording medium” refers to a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a DVD (Digital Versatile Disk), and a built-in computer system. A storage device such as a hard disk.

Further, the “computer-readable recording medium” means a volatile memory (for example, DRAM (Dynamic DRAM) in a computer system that becomes a server or a client when a program is transmitted through a network such as the Internet or a communication line such as a telephone line. Random Access Memory)), etc., which hold programs for a certain period of time.
The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 1 ... Wireless connection terminal number estimation apparatus, 2A, 2B, 2AB ... Base station, 3 ... Terminal, 11 ... Input part, 12 ... Output part, 13 ... Memory | storage part, 14 ... Processing part, 21 ... Terminal group calculation part, 22 ... terminal transition number calculation unit, 23 ... estimated connection number calculation unit, 40A, 40B ... wireless communication device

Claims (5)

For a terminal connected to a first wireless communication device that performs wireless communication with a plurality of terminals in the first wireless frequency band, the number of terminals connected to the first wireless communication device (first number of terminals) and A terminal that calculates the number of terminals (second terminal number) that can be connected to a second wireless communication apparatus that performs wireless communication with a plurality of terminals in a second wireless frequency band different from the first wireless frequency band A group calculator,
Using a priority ratio indicating which of the first radio frequency band or the second radio frequency band the terminal is connected to the radio communication device with priority, and the second terminal number , The number of terminals that remain connected to the first wireless communication device (the number of third terminals), and the number of terminals whose connection changes from the first wireless communication device to the second wireless communication device (fourth terminal). Terminal transition number calculation unit for calculating the number of terminals),
Based on the number of the first terminals, the number of the third terminals, and the number of the fourth terminals (the number of terminals whose connection transitions from the second wireless communication apparatus to the first wireless communication apparatus), An estimated connection number calculating unit for calculating an estimated connection number of terminals connected to the first wireless communication device;
A wireless connection terminal number estimation apparatus comprising:   The terminal group calculation unit determines the first terminal and the second terminal based on reception power information of each terminal for each of the first wireless communication device and the second wireless communication device. The apparatus for estimating a number of wireless connection terminals according to claim 1.   3. The wireless connection terminal number estimation apparatus according to claim 1, wherein the terminal group calculation unit updates the second number of terminals based on the calculated estimated number of connections. For a terminal connected to a first wireless communication device that performs wireless communication with a plurality of terminals in the first wireless frequency band, the number of terminals connected to the first wireless communication device (first number of terminals) and A terminal that calculates the number of terminals (second terminal number) that can be connected to a second wireless communication apparatus that performs wireless communication with a plurality of terminals in a second wireless frequency band different from the first wireless frequency band A group calculation step;
Using a priority ratio indicating which of the first radio frequency band or the second radio frequency band the terminal is connected to the radio communication device with priority, and the second terminal number , The number of terminals that remain connected to the first wireless communication device (the number of third terminals), and the number of terminals whose connection changes from the first wireless communication device to the second wireless communication device (fourth terminal). Terminal transition number calculating step for calculating the number of terminals),
Based on the number of the first terminals, the number of the third terminals, and the number of the fourth terminals (the number of terminals whose connection transitions from the second wireless communication apparatus to the first wireless communication apparatus), An estimated connection number calculating step for calculating an estimated connection number of terminals connected to the first wireless communication device;
The number of wireless connection terminal estimation method characterized by including. For a terminal connected to a first wireless communication device that performs wireless communication with a plurality of terminals in the first wireless frequency band, the number of terminals connected to the first wireless communication device (first number of terminals) and A terminal that calculates the number of terminals (second terminal number) that can be connected to a second wireless communication apparatus that performs wireless communication with a plurality of terminals in a second wireless frequency band different from the first wireless frequency band A group calculation step;
Using a priority ratio indicating which of the first radio frequency band or the second radio frequency band the terminal is connected to the radio communication device with priority, and the second terminal number , The number of terminals that remain connected to the first wireless communication device (the number of third terminals), and the number of terminals whose connection changes from the first wireless communication device to the second wireless communication device (fourth terminal). Terminal transition number calculating step for calculating the number of terminals),
Based on the number of the first terminals, the number of the third terminals, and the number of the fourth terminals (the number of terminals whose connection transitions from the second wireless communication apparatus to the first wireless communication apparatus), An estimated connection number calculating step for calculating an estimated connection number of terminals connected to the first wireless communication device;
A computer program for causing a computer to execute.

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