JP4397916B2 - Location registration control method, communication terminal, and communication system - Google Patents

Description

The present invention relates to a technique for periodically performing location registration of communication terminals accommodated in a mobile communication network.

  In a mobile communication system having a mobile communication network having facilities such as a ground station and an exchange and a mobile device such as a mobile phone accommodated in the mobile communication network, a communication service area is composed of a plurality of location areas. A mobile communication network in such a mobile communication system needs to know in which location area each mobile device in the communication service area is in preparation for an incoming call request to the mobile device. . For this reason, the mobile communication network performs so-called location registration processing for registering identification information of the location area where the mobile device is located for each mobile device in response to a location registration request from the mobile device. .

  In this location registration process, the mobile device, for example, transmits a location registration request signal to the mobile communication when it detects that its own power is turned on or when it detects that it has moved to another location area. Send to the network. In addition, during the period when the power is turned on, the mobile device notifies that it is still in the same location area even if it is still in the same location area. In order to do this, a location registration request signal is transmitted to the mobile communication network every predetermined period.

  By the way, in the case of the position registration process periodically performed among the position registration processes described above, the mobile device transmits a position registration request signal to the mobile communication network according to a predetermined fixed period. Therefore, even when the mobile communication network is in a congested state, the mobile device transmits a location registration request signal to the mobile communication network according to a predetermined period. As described above, the periodic location registration may further increase the traffic of the mobile communication network in a congested state.

The present invention has been made in view of the circumstances described above, and an object of the present invention is to provide a mechanism that can avoid concentration of traffic in a mobile communication network.

In order to solve the above-described problem, the present invention provides a receiving unit that receives information indicating whether or not a mobile communication network that accommodates the communication terminal is in a congested state, and the latest information received by the receiving unit. Indicates that the mobile communication network is in a congested state, the transmission status of the location registration request signal periodically transmitted to the mobile communication network for periodic location registration is A grace period in which the transmission timing can be postponed, and the changing means changes the transmission timing within a range included in the grace period. to provide a communication terminal characterized that you.
In the communication terminal according to the present invention, the changing means defers the transmission timing within a range included in the grace period until the congestion state is resolved, and the congestion state is not resolved within the grace period. In such a case, the time when the grace period has elapsed may be used as the transmission timing of the location registration request signal.
The present invention also includes a communication terminal and a base station control device, wherein the base station control device includes radio channel usage rate information indicating a radio channel usage rate in each base station, and mobile communication that accommodates the communication terminal. Received by the first receiving means, the first receiving means for receiving network traffic information generated by the communication quantity excluding the radio channel usage rate in the base station When the network traffic information indicates that the traffic of the mobile communication network has reached a level at which communication must be regulated, or the radio channel usage rate received by the first receiving means When the information indicates that the wireless channel usage rate exceeds a predetermined usage rate, information indicating that the mobile communication network is in a congested state is displayed. A second receiving unit configured to receive, from the base station, information indicating whether or not the mobile communication network transmitted from the transmitting unit is in a congested state. And the latest information received by the second receiving means indicates that the mobile communication network is in a congested state, the periodic information to the mobile communication network for periodic location registration the transmission timing of the location registration request signal to be transmitted to, have a changing means for postponed until the congestion condition is cleared, the changing means is set as a period that can postpone the transmission timing There is provided a communication system , wherein the transmission timing is changed within a range included in a grace period .
Also, the present invention includes a first step of managing apparatus in a mobile communication network detects the traffic at the mobile communication network, said management device, the move from the detected communication amount in said first step A second step of determining whether or not the communication network is in a congested state and notifying the determination result to a communication terminal accommodated in the mobile communication network; and the communication terminal is notified in the second step. If the latest determination result indicates that the mobile communication network is in a congested state, the transmission timing of the location registration request signal periodically transmitted to the mobile communication network for periodic location registration is set. And a third process for postponing until the congestion state is resolved, and in the third process, the communication terminal is set as a period during which the transmission timing can be postponed Within the range included in That you change the timing to provide a location registration control method characterized.

  According to the present invention, it is possible to avoid concentration of traffic in a mobile communication network.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the common part in each figure. Moreover, this embodiment shows one aspect | mode of this invention, This invention is not limited, It can change arbitrarily in the scope of the present invention.

[A. First Embodiment]
[A-1. Configuration of Embodiment]
<1. Configuration of mobile communication system>
FIG. 1 is a block diagram illustrating a configuration of a mobile communication system 1 including a management server 30 and a mobile phone 60 according to the first embodiment of the present invention. As shown in the figure, the mobile communication system 1 includes a mobile communication network 10 and a plurality of mobile phones 60 accommodated in the mobile communication network 10.

  The mobile communication network 10 includes a location register (hereinafter abbreviated as LR) 20, a management server 30, an exchange network 40 having a plurality of exchanges 41, and a plurality of base stations 50. The mobile communication network 10 provides a call service or a packet communication service to each mobile phone 60 located in the communication service area of the mobile communication network 10.

  In FIG. 1, in order to prevent the drawing from becoming complicated, a predetermined exchange 41 constituting the exchange network 40, a predetermined base station 50 connected to the exchange 41, and a predetermined mobile phone accommodated in the mobile communication network 10. Only the telephone 60 is shown.

Next, each device shown in FIG. 1 will be described.
The LR 20 has a home memory (not shown). This LR 20 provides home information (location area information) indicating to which location area each mobile phone 60 possessed by a service subscriber is located among a number of location areas constituting the communication service area. Location registration is performed by storing it in a memory.

  The LR 20 receives a location registration request signal transmitted from the mobile phone 60 via the exchange network 40. This location registration request signal includes a terminal ID that uniquely identifies the source mobile phone 60 and an area ID that uniquely identifies the location area in which the mobile phone 60 is located. Registers the area ID of the location area in the home memory in association with the terminal ID.

  The terminal ID is, for example, the telephone number or IP address of the mobile phone 60. The area ID is, for example, the exchange ID of each exchange 41 that constitutes the exchange network 40.

  The management server 30 performs control related to the location registration of each mobile phone 60 and detects the traffic (traffic) in the mobile communication network 10. The specific contents of “the amount of communication of the mobile communication network 10” will be described later.

  The exchange network 40 is a network in which a plurality of exchanges 41 are connected. Each switch 41 is connected to one or more base stations 50. Each of these exchanges 41 receives a call request from each mobile phone 60 located in a location area covered by the exchange 41, that is, in a radio area covered by each base station 50 connected to the exchange 41. In response to an incoming call request to each of the mobile phones 60, call connection processing or the like is performed. The location area is covered by one or more exchanges 41. Each exchange 41 stores an area ID of a location area that it covers.

  A large number of each base station 50 is installed in the communication service area of the mobile communication network 10 and performs wireless communication with the mobile phone 60 located in each wireless area.

  The mobile phone 60 is a mobile device that performs wireless communication with a base station 50 that covers a wireless area in which the mobile phone is located and receives a call service or a packet communication service. For example, when the mobile phone 60 detects that the power of its own device is turned on or detects that its own device has moved to another location area, the mobile phone 60 transmits a radio signal requesting position registration to the base station. 50. In addition, the mobile phone 60 periodically transmits a radio signal for requesting position registration even when the mobile phone 60 continues to be in the same location area during the period when the power of the mobile phone 60 is turned on. Transmit to station 50.

  In the following, in this specification, position registration excluding position registration performed when the power of the own device is turned on or when the own device moves to another location area, that is, periodically performed. The location registration is referred to as “periodic location registration”.

<2. Management Server Configuration>
FIG. 2 is a block diagram illustrating a hardware configuration of the management server 30 shown in FIG. As shown in the figure, the management server 30 includes a memory 301, a communication interface 302, an LR interface 303, and a CPU (Central Processing Unit) 304, which are connected by a bus 305. Yes.

  The memory 301 stores various programs executed by the CPU 304. The memory 301 has a cycle information storage table 301a. In this period information storage table 301a, period information for periodic location registration is stored as shown in FIG.

  As shown in the figure, the period information storage table 301a stores basic period information T1 and maximum period information T2. Here, the basic cycle information T1 is information indicating a basic cycle of periodic location registration, and indicates a basic transmission cycle in which the mobile phone 60 transmits a location registration request signal to the base station 50. The maximum cycle information T2 is information indicating an allowable maximum cycle of periodic position registration. This maximum cycle information T2 is transmitted when the mobile communication network 10 is in a congested state at the timing when the mobile phone 60 transmits a location registration request signal to the base station 50 based on the basic cycle information T1. Is used to control so that it can be postponed for a preset grace period. The value of the maximum cycle information T2 is a value obtained by adding the value of the grace period to the value of the basic cycle information T1.

  For example, as shown in the figure, when the basic cycle information T1 is 60 [min] and the maximum cycle information T2 is 70 [min], the periodic location registration is basically performed at a cycle of 60 minutes. There will be an exceptional 10-minute grace period. That is, when 60 minutes have elapsed since the transmission of the location registration request signal and the mobile communication network 10 is in a congested state when it is time to transmit the location registration request signal in the mobile phone 60, after 60 minutes, Only for a total period of 10 minutes up to less than 70 minutes, the mobile phone 60 can postpone the transmission timing of the location registration request signal until the congestion state of the mobile communication network 10 is resolved. If the congestion state of the mobile communication network 10 is not resolved within 10 minutes, the mobile phone 60 sends a location registration request signal regardless of the presence or absence of the congestion state in the mobile communication network 10 when 70 minutes have passed. Transmit to the base station 50.

  Returning to FIG. 2, the communication interface 302 is a circuit that controls data communication performed between the management server 30 and each exchange 41 constituting the exchange network 40. The LR interface 303 is a circuit that converts a data protocol or the like when the management server 30 accesses the LR 20.

  The CPU 304 controls each unit connected via the bus 305 by executing various programs stored in the memory 301. The CPU 304 executes network information transmission processing (see FIG. 7) as processing unique to the present embodiment, detects traffic in the mobile communication network 10, and generates traffic information. In addition, the CPU 304 transmits traffic information, basic cycle information T1, maximum cycle information T2, and the like to each switch 41 of the switching network 40 via the communication interface 302.

  More specifically, the communication amount of the mobile communication network 10 detected in the management server 30 is used for wireless communication in the exchange network 40, the access amount to the management server 30, and the base station 50. It is detected based on the occupied ratio of the used radio channel.

  In the present embodiment, the traffic information generated based on the traffic of the mobile communication network 10 is 1-bit data “0” or “1”. Here, when the traffic information is “1”, the amount of communication in the mobile communication network 10 has reached a level at which communication must be restricted and the amount of communication must be suppressed. It shows that it is in a congestion state. Further, when the traffic information is “0”, it indicates that the amount of communication in the mobile communication network 10 has not reached a level at which communication must be regulated, that is, the mobile communication network 10 is not in a congested state. .

<3. Configuration of switch>
FIG. 4 is a block diagram illustrating a hardware configuration of the exchange 41 shown in FIG. As shown in the figure, the exchange 41 has a memory 411, a communication interface 412, and a CPU 413, and these units are connected by a bus 414.

  The memory 411 stores various programs executed by the CPU 413. The memory 411 includes an area ID storage area 411a. In this area ID storage area 411a, the area ID of the location area covered by the exchange 41 is stored. Further, the memory 411 is used as a work area of the CPU 413, and temporarily stores, for example, traffic information received from the management server 30, basic cycle information T1, maximum cycle information T2, and the like.

  The communication interface 412 is a circuit that controls data communication performed between the exchange 41 and the LR 20, the management server 30, each base station 50, and another exchange 41.

  The CPU 413 controls each unit connected via the bus 414 by executing various programs stored in the memory 411. The CPU 413 transmits the area ID of the location area stored in the area ID storage area 411 a to each base station 50 connected to the exchange 41. Further, the CPU 413 transmits the traffic information, the basic cycle information T1 and the maximum cycle information T2 received from the management server 30 to each base station 50 connected to the exchange 41. In addition, the CPU 413 transmits a location registration request signal transmitted from the mobile phone 60 via the base station 50 to the LR 20.

<4. Base station configuration>
FIG. 5 is a block diagram illustrating a hardware configuration of the base station 50 shown in FIG. As shown in the figure, the base station 50 includes a memory 501, a communication interface 502, a wireless communication unit 503, and a CPU 504, and these units are connected by a bus 505.

  The memory 501 stores various programs executed by the CPU 504. The memory 501 is used as a work area for the CPU 504, and temporarily stores, for example, traffic information received from the exchange 41, basic cycle information T1, maximum cycle information T2, area ID, and the like.

  The communication interface 502 is a circuit that controls data communication performed between the base station 50 and the exchange 41.

  The wireless communication unit 503 includes an antenna 503 a and controls wireless data communication performed with the mobile phone 60. The wireless communication unit 503 generates a control signal including traffic information received from the exchange 41, basic cycle information T1, maximum cycle information T2, area ID, and the like under the control of the CPU 504. The control signal is a radio signal that is intermittently transmitted and received between the base station 50 and the mobile phone 60 using a control channel (CCH), and is registered between the mobile communication network 10 and each mobile phone 60. It is used for transmitting and receiving various control signals and information including. The wireless communication unit 503 generates a wireless signal for transmitting voice data or packet data for calling. The wireless communication unit 503 transmits these generated signals to the mobile phone 60 via the antenna 503a.

  Further, the wireless communication unit 503 receives a control signal transmitted from the mobile phone 60 via the antenna 503a, and demodulates the control signal to obtain a location registration request signal or the like. In addition, the wireless communication unit 503 receives a radio signal including voice data or packet data for a call, and demodulates the radio signal to obtain voice data or packet data.

  The CPU 504 controls each unit connected via the bus 505 by executing various programs stored in the memory 501. The CPU 504 executes control signal transmission processing (see FIG. 8) and control signal reception processing (see FIG. 10) as processing unique to the present embodiment, and performs control with the mobile phone 60 via the wireless communication unit 503. Send and receive signals.

<5. Configuration of mobile phone>
FIG. 6 is a block diagram illustrating a hardware configuration of the mobile phone 60 shown in FIG. As shown in the figure, the cellular phone 60 includes a wireless communication unit 601, an operation unit 602, a call processing unit 603, a display unit 604, a storage unit 605, and a CPU 609. Connected by a bus 610.

  The wireless communication unit 601 includes an antenna 601 a and controls wireless data communication performed with the base station 50. The wireless communication unit 601 generates a control signal including a location registration request signal under the control of the CPU 609. In addition, the wireless communication unit 601 generates a wireless signal for transmitting voice data or packet data for calling. Then, the wireless communication unit 601 transmits these generated signals to the base station 50 via the antenna 601a.

  Further, the wireless communication unit 601 receives a control signal transmitted from the base station 50 via the antenna 601a, demodulates the control signal, and transmits traffic information, basic period information T1, maximum period information T2, area ID, and the like. Get. In addition, the wireless communication unit 601 receives a radio signal including voice data or packet data for calling, and demodulates the radio signal to obtain voice data or packet data.

  The operation unit 602 includes a plurality of keys for inputting numbers, characters, operation instructions, and the like, and outputs operation signals corresponding to operations of these keys to the CPU 609. The call processing unit 603 includes, for example, a microphone, a speaker, a voice processing unit, and the like, and performs call processing including call connection / disconnection processing under the control of the CPU 609. The display unit 604 includes a liquid crystal display panel and a drive circuit that performs display control of the liquid crystal display panel.

  The storage unit 605 includes a ROM (Read Only Memory) 606, a RAM (Random Access Memory) 607, and a non-volatile memory 608 such as an SRAM (Static-RAM) or an EEPROM (Electrically Erasable Programmable Read Only Memory). .

  The ROM 606 stores various programs executed by the CPU 609. The RAM 607 is used as a work area for the CPU 609 and temporarily stores, for example, traffic information received from the base station 50, basic period information T1, maximum period information T2, area ID, and the like.

  The nonvolatile memory 608 includes a terminal ID storage area 608a and a visited area ID storage area 608b. In the terminal ID storage area 608a, the terminal ID of the mobile phone 60 is written, for example, when the mobile phone 60 is purchased. Further, the area ID storage area 608b stores the area ID of the location area where the mobile phone 60 received from the base station 50 is located.

The CPU 609 controls each unit connected via the bus 610 by executing various programs stored in the storage unit 605. Further, the CPU 609 has a timer function for measuring time. The CPU 609 executes a periodic location registration process (see FIG. 9) as a process unique to the present embodiment, except when the own apparatus is turned on or when the own apparatus moves to another location area. In the period, the mobile phone 60 is controlled to periodically transmit a location registration request signal to the base station 50.
The above is the configuration of the mobile communication system 1 according to the present embodiment.

[A-2. Operation of the embodiment]
Next, the operation of this embodiment will be described.
<1. Network information transmission processing>
FIG. 7 is a flowchart for explaining the operation of network information transmission processing executed by the CPU 304 in the management server 30. This network information transmission process is periodically started by the CPU 304 by a timer interrupt or the like.

  As shown in the figure, first, the CPU 304 performs processing for detecting the traffic of the mobile communication network 10 (step S101). Prior to the processing in step S101, the CPU 304 detects the amount of communication in the exchange network 40, detects the amount of access to the management server 30, and occupies the used radio channel sent from each base station 50. Processing for receiving rate information is executed, and the processing results and received information are stored in the memory 301. In step S <b> 101, the CPU 304 calculates the communication amount of the mobile communication network 10 based on these processing results and received information stored in the memory 301.

  Next, the CPU 304 determines the traffic information by comparing the calculated traffic value with the threshold value prepared in advance (step S102). That is, the CPU 304 sets the value of the traffic information to “1” when it is determined that the calculated traffic value is equal to or greater than the threshold value and the mobile communication network 10 is in a congested state. If the CPU 304 determines that the calculated traffic value is smaller than the threshold value and the mobile communication network 10 is not in a congested state, the CPU 304 sets the traffic information value to “0”.

  Thereafter, the CPU 304 reads the basic cycle information T1 and the maximum cycle information T2 from the cycle information storage table 301a (step S103). Then, the CPU 304 transmits the basic cycle information T1 and the maximum cycle information T2 and the traffic information determined in step S102 to each switch 41 constituting the switching network 40 via the communication interface 302 (step S104). The network information transmission process is terminated.

  Upon receiving traffic information, basic cycle information T1 and maximum cycle information T2 from the management server 30, each switch 41 transmits these pieces of information to each base station 50 connected to the switch 41. Each exchange 41 transmits the area ID of the location area stored in the area ID storage area 411 a to each base station 50 connected to the exchange 41.

<2. Control signal transmission processing>
Next, FIG. 8 is a flowchart for explaining the operation of the control signal transmission process executed by the CPU 504 in the base station 50. This control signal transmission process is periodically started by the CPU 504 by a timer interrupt or the like.

  As shown in the figure, first, the CPU 504 determines whether or not traffic information, basic cycle information T1, maximum cycle information T2, and area ID are received from the exchange 41 (step S201), and receives these pieces of information. If not, the process proceeds to step S203. If the CPU 504 determines that the traffic information, the basic cycle information T1, the maximum cycle information T2, and the area ID have been received, the CPU 504 stores these information in the memory 501 (step S202).

  Next, the CPU 504 determines whether or not the control signal transmission timing has been reached (step S203). However, here, the transmission timing of the control signal refers to timing including the time required to generate the control signal to be transmitted. If the CPU 504 determines that the control signal transmission timing has been reached, the CPU 504 reads the latest traffic information, basic period information T1, maximum period information T2, and area ID stored in the memory 501, and transmits the control signal. It is sent to the wireless communication unit 503 together with the command to instruct (step S204).

  In response to this, the wireless communication unit 503 first generates a control signal including the traffic information sent by the CPU 504, the basic period information T1, the maximum period information T2, and the area ID as notification information. Here, the broadcast information is information included in a broadcast channel (BCCH) in the control channel. The broadcast channel is a one-way channel from the base station 50 to each mobile phone 60 for reporting control information to each mobile phone 60 in the wireless area.

  Then, the wireless communication unit 503 transmits the generated control signal to each mobile phone 60 in the wireless area via the antenna 503a. Thereafter, the wireless communication unit 503 sends a transmission completion notification indicating that the transmission of the control signal is completed to the CPU 504. When the CPU 504 receives a transmission completion notification from the wireless communication unit 503 (step S205), the control signal transmission process ends.

<3. Periodic location registration process>
Next, FIG. 9 is a flowchart for explaining the operation of the periodic location registration process executed by the CPU 609 in the mobile phone 60. This periodic location registration processing is started by the CPU 609 after completing the location registration processing associated with power-on of the mobile phone 60 or movement of the mobile phone 60 to another location area.

  As shown in the figure, first, when the wireless communication unit 601 receives a control signal from the base station 50 (step S301), the CPU 609 receives traffic information contained in the control signal decoded by the wireless communication unit 601. Basic period information T1, maximum period information T2, and area ID are acquired (step S302). The CPU 609 stores the traffic information, the basic cycle information T1, and the maximum cycle information T2 in the work area of the RAM 607. Further, the CPU 609 stores the area ID in the area ID storage area 608b.

  Next, after resetting the count value of the timer (step S303), the CPU 609 starts the timer count (step S304). Then, the CPU 609 determines whether or not the count value of the timer has reached the count value based on the basic cycle information T1 stored in the RAM 607 (step S305).

  When determining that the count value of the timer has reached the count value based on the basic cycle information T1, the CPU 609 transmits a location registration request signal from the mobile phone 60 to the base station 50 in order to perform periodic location registration. If it is determined that the timing has come, the latest traffic information stored in the RAM 607 is acquired (step S306).

  Next, the CPU 609 determines whether or not the value of the traffic information is “1”, that is, whether or not the mobile communication network 10 is in a congested state (step S307). When the CPU 609 determines that the value of the traffic information is “0” and the mobile communication network 10 is not congested (step S307: No), the CPU 609 proceeds to the process of step S308.

  In step S308, the CPU 609 reads out its own terminal ID from the terminal ID storage area 608a of the nonvolatile memory 608 and also reads out the area ID from the area ID storage area 608b. Then, the CPU 609 sends these terminal ID and area ID and a command for instructing transmission of the location registration request signal to the wireless communication unit 601 (step S308). In response to this, the wireless communication unit 601 generates a control signal including a location registration request signal including the received terminal ID and area ID as individual cell information. Here, the dedicated cell information is information included in the dedicated cell channel (SCCH) in the control channel. The dedicated cell channel is a bidirectional channel for transferring control information between the base station 50 and the mobile phone 60.

  Then, the wireless communication unit 601 transmits the generated control signal to the base station 50 via the antenna 601a. Thereafter, the wireless communication unit 601 sends a transmission completion notification to the CPU 609. When receiving a transmission completion notification from the wireless communication unit 601 (step S309), the CPU 609 returns to step S301 and repeats the periodic location registration process.

  On the other hand, when the CPU 609 determines in step S307 that the value of the traffic information is “1”, that is, when it is determined that the mobile communication network 10 is currently congested (step S307: Yes), Next, it is determined whether or not the count value of the timer has reached the count value based on the maximum cycle information T2 stored in the RAM 607 (step S310).

  When the CPU 609 determines that the count value of the timer has not reached the count value based on the maximum cycle information T2, that is, the mobile communication network 10 is in a congested state and is equal to or higher than the basic cycle information T1. When the period is less than the maximum cycle information T2 (step S310: No), the process returns to step S306 in order to confirm the traffic of the mobile communication network 10 again.

  If the CPU 609 determines in step S310 that the count value of the timer has reached the count value based on the maximum period information T2 (step S310: Yes), the mobile communication network 10 regardless of the presence or absence of a congestion state. The process proceeds to step S <b> 308, and a control signal including a location registration request signal is transmitted from the wireless communication unit 601 to the base station 50.

  Here, for example, as shown in FIG. 3, a specific example in which the basic cycle information T1 is 60 [min] and the maximum cycle information T2 is 70 [min] will be described. In this case, in the mobile phone 60, basically, a control signal including a location registration request signal is transmitted to the base station 50 in a cycle of 60 minutes.

  When the CPU 609 determines that it is time to transmit a location registration request signal for periodic location registration to the base station 50, the CPU 609 determines whether or not the mobile communication network 10 is in a congested state (step S307). If the CPU 609 determines that the mobile communication network 10 is not congested (step S307: No), the CPU 609 immediately causes the radio communication unit 601 to transmit a control signal including a location registration request signal to the base station 50.

  When the CPU 609 determines that the mobile communication network 10 is in a congested state (step S307: Yes), the transmission timing of the location registration request signal is limited to a total period of 10 minutes from 60 minutes to less than 70 minutes. Can be postponed until the congestion state of the mobile communication network 10 is resolved. If the congestion state of the mobile communication network 10 is not resolved within 10 minutes, the CPU 609 performs control including a location registration request signal from the wireless communication unit 601 when the timer count value reaches 70 minutes. The signal is transmitted to the base station 50.

<4. Control signal reception processing>
FIG. 10 is a flowchart for explaining the operation of the control signal reception process executed by the CPU 504 in the base station 50. This control signal reception process is periodically started by the CPU 504 by a timer interrupt or the like.

  As shown in the figure, first, the CPU 504 determines whether or not the wireless communication unit 503 has received a control signal from the mobile phone 60 (step S401). If the control signal has not been received, the control is performed. The signal reception process ends.

  If the CPU 504 determines that the wireless communication unit 503 has received the control signal, the CPU 504 determines whether or not the location registration request signal is included in the control signal decoded by the wireless communication unit 503 (step S402). . If the CPU 504 determines that the location registration request signal is not included, the CPU 504 executes other processing related to reception of the control signal (step S403), and then ends the control signal reception processing.

  If the CPU 504 determines that the location registration request signal is included in the control signal received and decoded by the wireless communication unit 503, the CPU 504 sends the location registration request signal including the terminal ID and area ID to the communication interface 502. To the exchange 41 (step S404).

  When receiving the location registration request signal from the base station 50, the exchange 41 transmits this location registration request signal to the LR 20. In response to this, the LR 20 updates the area ID of the corresponding mobile phone 60 stored in the home memory in accordance with the terminal ID and the area ID included in the location registration request signal. Thereafter, the LR 20 returns a registration completion notification indicating that the requested location registration is completed to the base station 50.

  When the CPU 504 of the base station 50 receives a registration completion notification from the LR 20 via the exchange 41 (step S405), a wireless communication is performed with a control signal including the registration completion notification to the mobile phone 60 that has performed periodic location registration. Transmission is performed via the unit 503 (step S406). Thereafter, the CPU 504 ends the control signal reception process.

  As described above, according to the present embodiment, the mobile phone 60 has preset transmission timing of a location registration request signal for periodic location registration according to traffic information sent from the management server 30. It can be postponed for a grace period. Therefore, when the mobile communication network 10 is in a congested state, transmission of radio signals requesting periodic location registration from each mobile phone 60 accommodated in the mobile communication network 10 is suppressed as much as possible. Concentration can be avoided.

[B. Second Embodiment]
In the first embodiment, the case where the basic period information T1 and the maximum period information T2 for periodic location registration are fixed values has been described. In the present embodiment, a case will be described in which the basic period information T1 and the maximum period information T2 for periodic location registration are variably controlled in accordance with the traffic in the mobile communication network 10.

  Note that the mobile communication system according to the present embodiment is realized by a configuration similar to the configuration shown in FIG. Therefore, unless otherwise indicated, each device in the present embodiment has the same configuration as the first embodiment and performs the same operation. Further, in the present embodiment, the same reference numerals are used for portions common to the first embodiment. Further, the description of the parts common to the first embodiment will be omitted.

[B-1. Configuration of Embodiment]
In the present embodiment, the management server 31 has the hardware configuration shown in FIG. 11 in order to variably control the basic cycle information T1 and the maximum cycle information T2 for periodic location registration according to the traffic in the mobile communication network 10. ing. Here, as shown in the figure, the management server 31 according to the present embodiment has a memory 701, which includes a period information storage table 701a, a time zone management table 701b, and a day of week management table 701c. Have

  In the period information storage table 701a, as shown in FIG. 12, basic period information T1 and maximum period information T2 are stored for each mode number. The roles of the basic cycle information T1 and the maximum cycle information T2 are the same as those in the first embodiment. However, the values of the basic cycle information T1 and the maximum cycle information T2 stored for each mode number are larger time values as the mode number value is larger.

  Further, as shown in FIG. 13, the time zone management table 701b stores mode numbers for designating the basic cycle information T1 and the maximum cycle information T2 to be used for each time zone of the day. . Further, as shown in FIG. 14, the day of week management table 701c stores a mode addition value for correcting the value of the mode number for each day of the week.

  The time zone management table 701b and the day of week management table 701c are created by statistically measuring the communication volume of the mobile communication network 10 according to the time zone and day of the week. This is used to change the basic cycle information T1 and the maximum cycle information T2 for periodic location registration. In the present embodiment, the management server 30 variably controls the basic cycle information T1 and the maximum cycle information T2 for periodic location registration using the cycle information storage table 301a, the time zone management table 701b, and the day of week management table 701c described above. A specific method of the variable control will be described in detail in a cycle determination process (see FIG. 15) described later.

  Returning to FIG. 11, the CPU 304 controls each unit connected via the bus 305 by executing various programs stored in the memory 701. Further, the CPU 304 has a timer function for measuring the current time and a calendar function for grasping the current day of the week and date.

  The CPU 304 executes a cycle determination process (see FIG. 15) as a process unique to the present embodiment, and variably controls the basic cycle information T1 and the maximum cycle information T2 for periodic location registration according to time, day of the week, and the like. Further, the CPU 304 transmits the basic cycle information T1 and the maximum cycle information T2 determined as a result of the variable control to each switch 41 via the communication interface 302.

[B-2. Operation of the embodiment]
Hereinafter, the operation of this embodiment will be described.
In this embodiment, the control signal transmission process and control signal reception process executed by the base station 50 and the periodic location registration process executed by the mobile phone 60 are the same as those described in the first embodiment. Since it is the same, description will be omitted. Here, only the period determination process different from the first embodiment will be described.

  FIG. 15 is a flowchart for explaining the operation of the cycle determination process executed by the CPU 304 in the management server 31. This cycle determination process is executed in the management server 31 instead of the network information transmission process (see FIG. 7) described in the first embodiment. The cycle determination process is periodically started by the CPU 304 by a timer interrupt or the like.

  As shown in the figure, first, the CPU 304 obtains the current time measured by the timer function (step T101). Next, the CPU 304 refers to the time zone management table 701b in the memory 701 according to the acquired current time information, and acquires a mode number (step T102).

  For example, when the current time is “0:15”, the CPU 304 refers to the time zone management table 701b shown in FIG. 13 and acquires the mode number “1”. However, the basic periodic information T1 and the maximum periodic information T2 for periodic location registration are transmitted from the management server 30, and the timing for transmitting the location registration request signal according to the periodic information in the mobile phone 60 comes, for example, If the period information T1 is 40 minutes, it is 40 minutes or more away.

  In consideration of the above points, when the time zone management table 701b is constructed, the time information stored in the “time zone” column is set as the time ahead of the basic period information T1 as the time before the mode number. It is necessary to set the correspondence.

  Next, the CPU 304 acquires current day information using the calendar function (step T103). Then, the CPU 304 refers to the day-of-week management table 701c in the memory 701 according to the acquired day-of-week information, and acquires the mode addition value (step T104). Thereafter, the CPU 304 corrects the value of the mode number acquired in step T102 according to the acquired mode addition value (step T105).

  For example, when the current day-of-week information acquired using the calendar function is “Monday”, the CPU 304 refers to the day-of-week management table 701c shown in FIG. 14 and acquires the mode addition value “+1”. Then, when the mode number value acquired in step T102 is “1”, the CPU 304 corrects the mode number value “1” with the mode addition value “+1” and acquires the mode number “2”. To do.

  Next, the CPU 304 refers to the cycle information storage table 701a and acquires the basic cycle information T1 and the maximum cycle information T2 corresponding to the value of the mode number corrected in step T105 (step T106). For example, when the value of the mode number corrected in the above step T105 is “2”, the CPU 304 refers to the cycle information storage table 701a shown in FIG. 12 and refers to the basic cycle information T1 “60” and the maximum cycle. Information T2 “70” is acquired.

  Thereafter, the CPU 304 detects the amount of communication in the mobile communication network 10 (step T107). In addition, the CPU 304 determines traffic information according to the detected value of traffic (step T108). Since the processes in steps T107 and T108 are the same as the processes in steps S101 and S102 of the network information transmission process (see FIG. 7) described in the first embodiment, description thereof will be omitted.

  Then, the CPU 304 transmits the basic cycle information T1, the maximum cycle information T2, and the traffic information acquired in step T106 to each switch 41 via the communication interface 302 (step T109), and ends the cycle determination process.

  Through this cycle determination process, the basic cycle information T1 and the maximum cycle information T2 for periodic location registration determined according to the time and day of the week in the management server 31 are transmitted to the base station 50 via the exchange 41, and the base station 50 Is transmitted to each mobile phone 60 in the communication service area by the control signal transmission process executed in FIG. Each mobile phone 60 transmits a control signal including a location registration request signal for periodic location registration to the base station 50 at a cycle according to the basic cycle information T1 and the maximum cycle information T2 received from the base station 50. Send.

  As described above, according to the present embodiment, the management server 31 variably controls the basic cycle information T1 and the maximum cycle information T2 for periodic location registration according to time, day of the week, and the like. Further, the cellular phone 60 transmits a location registration request signal for periodic location registration to the base station 50 at a cycle according to the basic cycle information T1 and the maximum cycle information T2 sent from the management server 31.

  Therefore, in the mobile communication system 1, the periodic location registration cycle can be changed according to the time zone and the day of the week. Thereby, for example, in a period in which the mobile communication network 10 is predicted to be in a congested state, each mobile phone 60 accommodated in the mobile communication network 10 has a longer transmission cycle of a radio signal for requesting periodic location registration. Can be set to a time span. That is, it is possible to avoid the concentration of traffic in the mobile communication network 10 during a period in which a congestion state is predicted.

  Further, even if the congestion state does not occur, if the communication amount of the mobile communication network 10 is large, the location registration for periodic location registration from each mobile phone 60 accommodated in the mobile communication network 10 Transmission of request signals can be suppressed as much as possible, and traffic concentration in the mobile communication network 10 can be avoided. Thus, for example, when the amount of communication in the mobile communication network 10 is large, communication related to higher real-time processing or more important processing other than periodic location registration is performed in the mobile communication network 10 with priority. Can be made.

  In the present embodiment, the management server 31 may be configured to variably control the basic cycle information T1 and the maximum cycle information T2 for periodic location registration in consideration of information such as holidays and the end of the month.

[C. Third Embodiment]
In the present embodiment, a case where the mobile communication network further includes a base station control device will be described. In the mobile communication system according to the present embodiment, each device has the same configuration as that of the first embodiment and performs the same operation unless otherwise specified. Further, in the present embodiment, the same reference numerals are used for portions common to the first embodiment. Further, the description of the parts common to the first embodiment will be omitted.

[C-1. Configuration of Embodiment]
FIG. 16 is a block diagram illustrating the configuration of the mobile communication system 2 according to the third embodiment of the invention. In the mobile communication system 2 shown in the figure, a base station controller 80 that controls each base station 50 is provided between the exchange 41 and each base station 50.

  In addition, the management server 32 in the present embodiment is different from the management server 30 described in the first embodiment in that when the traffic of the mobile communication network 11 is detected, the usage rate of the radio channel in each base station 50 is changed. The point that the communication amount is detected based on the communication amount in the exchange network 40 and the access amount to the management server 32 is excluded. In the present embodiment, the traffic information generated according to the communication amount in the management server 32 is described as “network traffic information”.

  The base station control device 80 is connected to the exchange 41 and a plurality of base stations 50 that the exchange 41 has. The base station control device 80 includes network traffic information transmitted from the management server 32 via the exchange 41, and base stations 50 transmitted from the respective base stations 50 connected to the base station control device 80. The individual traffic information for each base station 50 is generated on the basis of the wireless channel usage rate information and transmitted to each base station 50.

  Note that the wireless channel usage rate information is the number of channels in use in the total number of wireless channels prepared for the base station 50 to perform wireless communication with each mobile phone 60 in the wireless area covered by the base station 50. It shows the ratio.

  Next, FIG. 17 is a block diagram illustrating a hardware configuration of the base station control device 80 shown in FIG. As shown in the figure, the base station control device 80 includes a memory 801, a communication interface 802, and a CPU 803, and these units are connected by a bus 804.

  The memory 801 stores various programs executed by the CPU 803. The memory 801 has a network information storage area 801a and a base station information storage area 801b. In the network information storage area 801a, as shown in FIG. 18A, network traffic information, basic period information T1, maximum period information T2 transmitted from the management server 32, and area transmitted from the exchange 41 ID is stored. Further, in the base station information storage area 801b, as shown in FIG. 18B, the base station information is received from the base station 50 for each base station ID of each base station 50 connected to the base station control device 80. Radio channel usage rate information is stored.

  The communication interface 802 is a circuit that controls data communication performed between the base station control device 80 and the exchange 41 or each base station 50.

  The CPU 803 controls each unit connected via the bus 804 by executing various programs stored in the memory 801. The CPU 803 executes an individual traffic detection process (see FIG. 19) as a process unique to the present embodiment, and for each base station 50 based on the network traffic information and the radio channel usage rate information of each base station 50. Is generated and transmitted to each base station 50.

[C-2. Operation of the embodiment]
Hereinafter, the operation of this embodiment will be described.
First, the management server 32 detects the communication amount of the mobile communication network 11 based on the communication amount in the exchange network 40, the access amount to the management server 32, etc., and “1” or “0” based on this communication amount. Network traffic information is generated. Then, the management server 32 transmits network traffic information, basic cycle information T1, and maximum cycle information T2 to the exchange 41.

  Further, when receiving the network traffic information, the basic cycle information T1, and the maximum cycle information T2 from the management server 32, the exchange 41 uses these information and the area ID of the location area stored in the area ID storage area 411a as a base. Transmit to the station controller 80.

  FIG. 19 is a flowchart for explaining the operation of the individual traffic detection process executed by the CPU 803 in the base station controller 80. This individual traffic detection process is periodically started by the CPU 803, for example, by a timer interrupt or the like.

  As shown in the figure, first, the CPU 803 determines whether or not network traffic information, basic cycle information T1, maximum cycle information T2 and area ID are received from the exchange 41 (step U101). If not received, the process proceeds to step U103. If the CPU 803 determines that the network traffic information, the basic cycle information T1, the maximum cycle information T2, and the area ID are received, the CPU 803 stores these information in the network information storage area 801a of the memory 801 (step U102).

  Next, the CPU 803 determines whether or not radio channel usage rate information has been received from each base station 50 connected to the base station control device 80 (step U103), and if this information has not been received, The process proceeds to step U104. When the CPU 803 determines that the wireless channel usage rate information has been received from any of the base stations 50, the CPU 803 associates this information with the base station ID of the base station 50 to store the base station information storage area 801b in the memory 801. (Step U104).

  Thereafter, the CPU 803 performs processing for detecting individual traffic for each base station 50. First, the CPU 803 specifies the base station 50 that detects the individual traffic (step U105). Next, the CPU 803 refers to the base station information storage area 801b according to the identified base station ID of the base station 50, and acquires the radio channel usage rate information of this base station 50 (step U106).

  Next, the CPU 803 acquires network traffic information from the network information storage area 801a (step U107). Then, the CPU 803 calculates the individual traffic information for the base station 50 based on the radio channel usage rate information of the base station 50 and the network traffic information (step U108).

Here, the calculation process of the individual traffic in step U108 will be described more specifically.
First, the network traffic information transmitted from the management server 32 to the base station control device 80 is 1-bit data of “1” or “0”. When the network traffic information is “1”, it indicates that in the mobile communication network 11, the communication amount of the exchange network 40 or the access amount to the management server 32 is at a level where communication must be regulated. Further, when the network traffic information is “0”, it indicates that the communication amount of the exchange network 40 and the access amount to the management server 32 have not reached a level at which communication must be regulated.

  The radio channel usage rate information transmitted from each base station 50 to the base station control device 80 is, for example, numerical data such as “67” when the usage rate is 67%.

  First, the CPU 803 compares the value of the wireless channel usage rate information with a threshold value prepared in advance, and converts the usage rate information into binary data of “1” or “0”. That is, the CPU 803 must restrict communication because the value of the wireless channel usage rate information is equal to or greater than the threshold value and the usage rate of the wireless channel in the base station 50 exceeds the predefined usage rate. When it is determined that the level is a necessary level, the value of the wireless channel usage rate information is converted to “1”. When the CPU 803 determines that the value of the wireless channel usage rate information is smaller than the threshold value and the usage rate of the wireless channel in the base station 50 has not reached a level at which communication must be regulated. Then, the value of the wireless channel usage rate information is converted to “0”.

  Next, the CPU 803 calculates the value of the individual traffic information based on the radio channel usage rate information converted into binary data “1” or “0” and the network traffic information that is binary data. The value of this individual traffic information is binary data of “1” or “0”, and as shown in FIG. 20, the values of both the network traffic information and the radio channel usage rate information are “0”. Is set to “0”, and “1” is set when one or more of network traffic information and radio channel usage rate information is “1”.

  Here, when the value of the individual traffic information is “1”, at least one of the communication amount in the exchange network 40, the access amount to the management server 32, and the wireless channel usage rate in the base station 50 is at a level that restricts communication. It indicates that the mobile communication network 11 is congested. When the information value of the individual traffic is “0”, the communication amount in the exchange network 40, the access amount to the management server 32, and the usage rate of the radio channel in the base station 50 have not yet reached the level for restricting communication. That is, the mobile communication network 11 is not in a congested state.

  Thereafter, the CPU 803 first reads out the basic cycle information T1, the maximum cycle information T2, and the area ID from the network information storage area 801a. Then, the individual traffic information calculated in step U108, the basic cycle information T1, the maximum cycle information T2, and the area ID are transmitted via the communication interface 802 to the base station 50 specified in step U105 (step U109).

  Next, the CPU 803 determines whether or not the individual traffic information detection process for the other base station 50 remains (step U110). If the CPU 803 determines that the individual traffic information detection process for the other base station 50 remains, the CPU 803 returns to step U105. On the other hand, when the CPU 803 determines that the individual traffic information detection process for the other base station 50 does not remain, the CPU 803 ends the individual traffic detection process.

  On the other hand, when the base station 50 receives the individual traffic information, the basic cycle information T1, the maximum cycle information T2, and the area ID from the base station control device 80, the base station 50 generates a control signal including these pieces of information as broadcast information. 60.

  The CPU 609 of the mobile phone 60 refers to the value of the individual traffic information included in the control signal received from the base station 50 when the transmission timing of the location registration request signal for periodic location registration is reached. When the value of the individual traffic information is “0”, that is, when it is determined that the mobile communication network 11 is not in a congested state, the CPU 609 immediately receives a control signal including a location registration request signal from the wireless communication unit 601. Are transmitted to the base station 50. Further, when the value of the individual traffic information is “1”, that is, when it is determined that the mobile communication network 10 is in a congested state, the CPU 609 limits only the period from the basic cycle information T1 to the maximum cycle information T2. The transmission timing of the location registration request signal is postponed until the congestion state of the mobile communication network 11 is resolved.

  As described above, according to the present embodiment, the mobile phone 60 sets the transmission timing of the location registration request signal for periodic location registration in advance according to the individual traffic information sent from the base station control device 80. It can be postponed for a set grace period. Therefore, the transmission timing of the location registration request signal for periodic location registration can be changed for each base station 50.

  In the present embodiment, the case where the transmission timing of the location registration request signal for periodic location registration is changed according to the individual traffic information has been described. However, as described in the second embodiment, the configuration may be such that the values of the basic period information T1 and the maximum period information T2 for periodic location registration are variably controlled according to the individual traffic information.

  In this case, the base station controller 80 transmits network traffic information transmitted from the management server 32 via the exchange 41, and base stations transmitted from the base stations 50 connected to the base station controller 80, respectively. Based on the radio channel usage rate information of the station 50, basic period information T1 and maximum period information T2 are determined for each base station 50 and transmitted to the corresponding base station 50. Further, when receiving the basic cycle information T1 and the maximum cycle information T2 from the base station controller 80, the base station 50 generates a control signal including these pieces of information as broadcast information and transmits the control signal to the mobile phone 60.

  Then, the CPU 609 of the mobile phone 60 transmits a location registration request signal for periodic location registration to the base station 50 in accordance with the cycle according to the basic cycle information T1 and the maximum cycle information T2 received from the base station 50. Therefore, the basic period information T1 and the maximum period information T2 for periodic location registration can be changed in units of 50 base stations.

[D. Modified example]
As mentioned above, although embodiment of this invention was described, this embodiment is an illustration to the last, and various deformation | transformation are possible in the range which does not deviate from the meaning of this invention. As modifications, for example, the following can be considered.

<Modification 1>
In the first embodiment, the management server 30 may be configured to execute the following network information transmission process (see FIG. 21) instead of the network information transmission process shown in FIG. In this case, it is assumed that the periodic information storage table 701a shown in FIG. 12 is stored in the memory 301 of the management server 30 instead of the periodic information storage table 301a shown in FIG.

FIG. 21 is a flowchart for explaining the operation of a modified example of the network information transmission process executed by the CPU 304 in the management server 30.
As shown in the figure, first, the CPU 304 detects the amount of communication in the mobile communication network 10 (step V101). In addition, the CPU 304 determines traffic information according to the detected value of traffic (step V102). Since the processes in steps V101 and V102 are the same as the processes in steps S101 and S102 of the network information transmission process (see FIG. 7) described in the first embodiment, the description thereof is omitted.

  Next, the CPU 304 compares the traffic value calculated in step V101 with a plurality of threshold values prepared in advance, and designates the mode number for designating the basic cycle information T1 and the maximum cycle information T2 to be used. Is determined (step V103).

  Here, the CPU 304 selects a mode number for designating the basic period information T1 and the maximum period information T2 having a larger time width as the detected traffic of the mobile communication network 10 is larger. As a result, when the communication amount in the mobile communication network 10 is large, the CPU 304 sets the basic period information T1 and the maximum period information T2 for periodic location registration to a larger time width, and the communication amount in the mobile communication network 10 is small. The basic cycle information T1 and the maximum cycle information T2 can be set to a smaller time width.

  Next, the CPU 304 refers to the cycle information storage table 701a in the memory 301 and acquires the basic cycle information T1 and the maximum cycle information T2 corresponding to the mode number determined in step U103 (step V104).

  Thereafter, the CPU 304 transmits the basic cycle information T1 and the maximum cycle information T2 acquired in step V104 and the traffic information determined in step V102 to each switch 41 via the communication interface 302 (step V105). Then, the network information transmission process is terminated.

  With such a configuration, the management server 30 can determine the basic cycle information T1 and the maximum cycle information T2 for periodic location registration in accordance with the traffic of the mobile communication network 10 and notify each mobile phone 60 of it. . Thereby, for example, when the amount of communication in the mobile communication network 10 is large, the period of periodic location registration can be set to a larger time width. Therefore, when the communication volume of the mobile communication network 10 is large, transmission of radio signals requesting periodic location registration from each mobile phone 60 accommodated in the mobile communication network 10 is suppressed as much as possible, and traffic in the mobile communication network 10 is reduced. Concentration can be avoided.

  However, as described above, the basic period information T1 and the maximum period information T2 for periodic location registration are transmitted from the management server 30, and the mobile phone 60 comes at a timing to transmit a location registration request signal according to the period information. For example, if the basic cycle information T1 is 60 minutes, it is at least 60 minutes ahead. Therefore, the control configuration in the present modification is particularly effective when the period of the periodic position registration is a short time such as 10 minutes or 15 minutes.

<Modification 2>
In the first to third embodiments, the traffic detection processing in the mobile communication networks 10 and 11 and the processing for determining the periodic location registration period are executed in the management servers 30, 31, and 32 that manage location registration. It was set as the structure to do. However, the devices that perform these processes are not limited to the location registration management servers 30, 31, and 32. For example, in the mobile communication networks 10 and 11, a dedicated server that executes only the above-described communication amount detection processing in the mobile communication networks 10 and 11 and processing for determining the period of periodic location registration is installed in the mobile communication networks 10 and 11. Also good. Further, these processes may be performed by the LR 20.

<Modification 3>
In the first and third embodiments, the basic cycle information T1 and the maximum cycle information T2 are fixed values. Therefore, in the first embodiment, the basic cycle information T1 and the maximum cycle information T2 are not stored in the management servers 30 and 32, but are stored in the memory 501 of each base station 50. Good. With such a configuration, the data communication capacity between the management servers 30 and 32 and each base station 50 can be reduced.

<Modification 4>
In the first embodiment, the case has been described in which the values of the basic period information T1 and the maximum period information T2 for periodic location registration are fixed values unified throughout the mobile communication network 10. However, the values of the basic cycle information T1 and the maximum cycle information T2 do not have to be unified throughout the mobile communication network 10. For example, the values of the basic cycle information T1 and the maximum cycle information T2 may be configured to be unified for each location area. In the second embodiment, the values of the basic period information T1 and the maximum period information T2 of periodic location registration are variably controlled in the entire mobile communication network 10 according to the communication amount in the mobile communication network 10. explained. However, in this case as well, as in the case described above, the values of the basic cycle information T1 and the maximum cycle information T2 that are variably controlled do not have to be unified throughout the mobile communication network 10, for example, in units of location areas. It only has to be done.

<Modification 5>
In the third embodiment, the case where one base station control apparatus 80 controls a plurality of base stations 50 has been described. However, the base station control device 80 may be configured to be installed for each base station 50. Further, the switch 41 or the base station 50 may have a function of the base station control device 80, that is, a function of generating and notifying individual traffic information for each base station 50. Further, the transmission timing of the location registration request signal for periodic location registration or the basic cycle information T1 and the maximum cycle information T2 for periodic location registration is changed in units of the exchange 41 instead of the base station 50 units. Also good.

<Modification 6>
In the first to third embodiments, the case where the mobile phone 60 is used as the communication terminal has been described. However, the present invention is also applicable to, for example, a PDA (Personal Digital Assistant) or a mobile computer that can perform data communication via the mobile communication networks 10 and 11. Further, the present invention is also applied to a communication terminal that does not move, such as a communication unit capable of performing data communication via the mobile communication network 10 provided in the vending machine in order to acquire product sales information. Is applicable. The present invention is also applicable to, for example, a PDC (Personal Digital Cellular) mobile communication system, a PHS (Personal Handyphone System: registered trademark) mobile communication system, and the like.

1 is a block diagram illustrating a configuration of a mobile communication system including a management server and a mobile phone according to a first embodiment of this invention. It is a block diagram which illustrates the hardware constitutions of the management server which concerns on the embodiment. In the management server which concerns on the embodiment, it is a figure which illustrates the data structure of the period information storage table in memory. It is a block diagram which illustrates the hardware constitutions of the exchange concerning the embodiment. 2 is a block diagram illustrating a hardware configuration of a base station according to the embodiment. FIG. 3 is a block diagram illustrating a hardware configuration of the mobile phone according to the embodiment. FIG. 5 is a flowchart for explaining an operation of network information transmission processing executed by a CPU in the management server according to the embodiment. 6 is a flowchart illustrating an operation of a control signal transmission process executed by a CPU in the base station according to the embodiment. 6 is a flowchart for explaining an operation of periodic location registration processing executed by a CPU in the mobile phone according to the embodiment. 6 is a flowchart illustrating an operation of a control signal reception process executed by a CPU in the base station according to the embodiment. It is a block diagram which illustrates the hardware constitutions of the management server which concerns on 2nd Embodiment of this invention. In the management server which concerns on the embodiment, it is a figure which illustrates the data structure of the period information storage table in memory. In the management server which concerns on the embodiment, it is a figure which illustrates the data structure of the time slot | zone management table in memory. In the management server which concerns on the same embodiment, it is a figure which illustrates the data structure of the day of week management table in memory. 6 is a flowchart illustrating an operation of a cycle determination process executed by a CPU in the management server according to the embodiment. It is a block diagram which illustrates the structure of the mobile communication system which concerns on 3rd Embodiment of this invention. It is a block diagram which illustrates the hardware constitutions of the base station control apparatus which concerns on the same embodiment. In the base station control apparatus according to the same embodiment, it is a diagram illustrating the storage contents of the network information storage area and the base station information storage area in the memory. 6 is a flowchart illustrating an operation of individual traffic detection processing executed by a CPU in the base station control device according to the embodiment. FIG. 20 is a diagram for explaining individual traffic information determined based on network traffic information and radio channel usage rate information in the individual traffic detection process shown in FIG. 19. It is a flowchart explaining the operation | movement of the modification of the network information transmission process performed by CPU in the management server which concerns on 1st Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 2 ... Mobile communication system 10, 11 ... Mobile communication network, 20 ... Location register (LR), 30, 31, 32 ... Management server, 40 ... Switching network, 41 ... Switch, 50 ... Base station, 60 ... Mobile Telephone ... 80 ... Base station controller 301 ... Memory 301a ... Cycle information storage table 302 ... Communication interface 303 ... LR interface 304 ... CPU 305 ... Bus 411 ... Memory 411a ... Area ID storage area 412: Communication interface, 413 ... CPU, 414 ... Bus, 501 ... Memory, 502 ... Communication interface, 503 ... Wireless communication unit, 503a ... Antenna, 504 ... CPU, 505 ... Bus, 601 ... Wireless communication unit, 601a ... Antenna, 602: Operation unit, 603 ... Call processing unit, 604 ... Display unit, 605 ... Memory , 606 ... ROM, 607 ... RAM, 608 ... non-volatile memory, 608a ... terminal ID storage area, 608b ... existing area ID storage area, 609 ... CPU, 610 ... bus, 701 ... memory, 701a ... periodic information storage table, 701b: Time zone management table, 701c: Day of week management table, 801 ... Memory, 801a ... Storage area, 801b ... Storage area, 802 ... Communication interface, 803 ... CPU, 804 ... Bus.

Claims (4)

Receiving means for receiving information indicating whether or not the mobile communication network accommodating the communication terminal is in a congested state;
If the latest information received by the receiving means indicates that the mobile communication network is in a congested state, a location registration request periodically transmitted to the mobile communication network for periodic location registration Changing means for postponing the signal transmission timing until the congestion state is resolved ,
There is a grace period that can postpone the transmission timing,
The changing means changes the transmission timing within a range included in the grace period.
Communication terminal, wherein a call. The changing means postpones the transmission timing within the range included in the grace period until the congestion state is resolved, and if the congestion state is not resolved within the grace period, the grace period communication terminal according to claim 1, wherein the but to the elapsed time and the transmission timing of the location registration request signal. A communication terminal and a base station control device;
The base station controller is
Created based on radio channel usage rate information indicating the radio channel usage rate in each base station, and the communication volume of the mobile communication network accommodating the communication terminal, excluding the radio channel usage rate in the base station First receiving means for receiving received network traffic information;
The network traffic information received by the first receiving means indicates that the traffic of the mobile communication network has reached a level at which communication must be regulated, or the first reception If the wireless channel usage rate information received by the means indicates that the usage rate of the wireless channel exceeds a predetermined usage rate, the mobile communication network is in a congested state. Transmission means for transmitting information indicating to each base station,
The communication terminal is
Second receiving means for receiving from the base station information indicating whether or not the mobile communication network transmitted from the transmitting means is in a congested state;
If the latest information received by the second receiving means indicates that the mobile communication network is in a congested state, periodically transmit to the mobile communication network for periodic location registration the transmission timing of the location registration request signal, have a changing means for postponed until the congestion condition is cleared,
The said change means changes the said transmission timing within the range included in the grace period set as a period which can postpone the said transmission timing, The communication system characterized by the above-mentioned . A first process in which a mobile communication network management device detects a traffic in the mobile communication network;
The management device determines whether or not the mobile communication network is in a congestion state from the traffic detected in the first process, and notifies the determination result to a communication terminal accommodated in the mobile communication network. The second process,
In the communication terminal, when the latest determination result notified in the second process indicates that the mobile communication network is in a congested state, the mobile communication network is used for periodic location registration. A third process of delaying the transmission timing of the location registration request signal to be transmitted periodically to the congestion state is resolved ,
In the third process, the communication terminal changes the transmission timing within a range included in a grace period set as a period in which the transmission timing can be postponed.
Location registration control method comprising the this.

Images