JP2006115166A - Radio communication system, radio communication terminal, terminal state control server, and control method of radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a radio communication terminal in convenience in a radio communication system, and to restrain the radio communication terminal from increasing in useless power consumption. <P>SOLUTION: The starting signals of the radio communication terminal are broadcasted in the service area of a radio base station. A power supply automatic introducing means automatically turns on the power supply of the radio communication terminal when the starting signals are detected by a starting signal detector connected to the radio communication terminal, and is provided to the radio communication terminal. If communications are broken off when the radio communication terminal gets out of a service area, the power supply of the radio communication terminal is automatically turned OFF. After the power supply is turned ON, the radio communication terminal is automatically brought into contact with the radio base station (communication network), the terminal identifier unique to a terminal and the current state of the terminal are continuously transmitted to the terminal state control server connected to the communication network at regular time intervals. When the other communication terminal is called up, the current state of the communication terminal to call up is confirmed through the terminal state control server. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a radio communication system, a radio communication terminal, a terminal state management server, and a radio communication system control method, and in particular, automatically powers on a radio communication terminal using an RFID transmitter and an RFID receiver. The present invention relates to a technique effective when applied to a wireless communication system.

  Conventionally, a public wireless LAN service using a wireless LAN system enables connection to a communication network on the go (see, for example, Non-Patent Document 1).

  However, the wireless LAN system uses the public wireless LAN service because the distance that radio waves used for wireless communication reach, that is, the area (service area) in which wireless communication with the wireless base station can be performed is limited. The possible service areas are limited places such as station stations and coffee shops.

  A user carrying a wireless information terminal that is a terminal that can be connected to a wireless base station of the public wireless LAN service, such as an IP phone or the like with other information terminals on the network using the public wireless LAN service When communicating, the user first moves to the service area. At this time, the user is usually turned off to save battery power when the wireless information terminal is not used. Therefore, when the wireless information terminal is turned off, it must be turned on after moving to the service area. Thereafter, a connection operation is performed in order to connect to the wireless base station and to communicate with the information terminal. When the user moves out of the service area, the power is turned off again to prevent battery consumption.

  Also, when making a call such as making an IP phone call from the information terminal on the network to the wireless information terminal, the user turns on the wireless information terminal and connects to the wireless base station even when the user is in the service area. Otherwise, you will not be able to receive the call. Therefore, every time the user moves to the service area, the wireless information terminal needs to be turned on and connected.

It is troublesome for the user to perform such an operation every time the user moves to the service area, which is a factor that limits the usefulness of the service. However, the original state is not an environment that can eliminate such annoyance.
Hideaki Matsue, Hiroshi Kitajo, Toru Sakata, “Current Status and Issues of Wireless Access Technology for Ubiquitous Services”, NTT Technology Journal, March 2003, p.8-11

  The problem to be solved by the present invention is that, as described in the background art, in order to communicate with other information terminals, the user consciously powers on and connects the wireless information terminal in the service area. When moving outside the service area, it is necessary to turn off the power, which is inconvenient.

  In order to solve such troublesome power management, a method of always turning on the power can be considered. However, since miniaturization and weight reduction are important in the wireless information terminal, in order to maintain the duration of the battery as a power source. In addition, it is difficult to increase the capacity because the weight of the terminal itself increases.

  Also, when making a telephone call using an IP phone using the wireless LAN service, the wireless information terminal must be turned on and connected to the wireless base station in preparation for receiving a call request signal. Don't be. Therefore, in situations where you do not know when an IP phone call comes from another information terminal, wasteful power consumption will increase until you receive a call. ) Is exhausted and can only be talked for a short time.

  An object of the present invention is to bother the power-on operation, the wireless connection operation, the power-off operation, etc. performed by the user of the wireless communication terminal by sensing a service area in a wireless communication system such as a public wireless LAN service. It is an object of the present invention to provide a technique capable of reducing the above.

  Another object of the present invention is to useless power consumption by turning on a power supply in preparation for a call from another communication terminal in a wireless communication system such as a public wireless LAN service and waiting in a state of being connected to a wireless base station. It is to provide a technology capable of suppressing the problem.

  The above and other objects and novel features of the present invention will be apparent from the description of this specification and the accompanying drawings.

  The outline of the invention disclosed in the present application will be described as follows.

  (1) A communication network to which a radio base station and a terminal state management server are connected, a radio communication terminal capable of connecting to the communication network by performing radio connection with the radio base station, and the radio An activation signal notifier for notifying a wireless signal (hereinafter referred to as an activation signal) for activating the wireless communication terminal within an area where the wireless connection between the communication terminal and the wireless base station is possible (hereinafter referred to as a service area); A wireless communication system comprising an activation signal detector for detecting the activation signal notified from the activation signal alarm, wherein the activation signal detector is connected to the wireless communication terminal, An automatic power-on means for automatically powering on the wireless communication terminal based on a detection signal output when the activation signal detector detects the activation signal; After the wireless communication terminal is connected to the wireless base station, while being connected to the wireless base station, a terminal status message including a unique terminal identifier assigned to the terminal and the state of the terminal is fixed. Terminal status message transmitting means that continues to transmit to the terminal status management server at a time interval of, and the terminal status management server includes a unique terminal identifier assigned to each communication terminal connectable to the communication network and the communication Means for holding a terminal state management list in which terminal states are associated, and each time the terminal state management server receives the terminal state message from the wireless communication terminal, the state of the terminal included in the terminal state message And associated with the same terminal identifier as the terminal identifier included in the terminal state message in the terminal state management list A wireless communication system that compares the state of the terminal and rewrites the state of the terminal in the terminal state management list to the state of the terminal in the terminal state message when the state of each terminal is different.

  (2) In the above (1), the wireless information terminal includes means for turning off the own wireless information terminal when the connection with the wireless base station is disconnected.

  (3) In (2), each time the terminal state management server receives the terminal state message from the wireless communication terminal, the terminal state management server sets or resets a timer associated with the terminal identifier included in the terminal state message. Timer management means that operates, and if there is a timer that has timed out among the timers that are operating, the state of the terminal of the terminal identifier that is associated with the timed-out timer in the terminal state management list, The communication network is rewritten to be disconnected.

  (4) In any one of (1) to (3), the terminal state management server includes call control means for controlling a call and a response to the call when communication is performed between two or more communication terminals. The call control means refers to the terminal state management list when receiving a call request signal from a communication terminal connected to the communication network, and is in a state where the state of the call destination communication terminal can respond. In this case, the call request signal is transmitted to the call destination communication terminal, and when the call destination communication terminal is in a response impossible state, the communication terminal that has transmitted the call request signal is notified of the response failure.

  (5) The terminal state management server retains a call request history including a terminal identifier and a call request date and time of the communication terminal that has transmitted the call request signal when the call destination communication terminal is in a state where a response is impossible. And the terminal state management server transmits the call request history to the communication terminal when receiving the terminal state message transmitted from the communication terminal in the response impossible state.

  In the wireless communication system of the present invention, as in the means of (1), the activation signal detecting means is connected to the wireless communication terminal, and the activation signal detecting means is notified in the service area of the wireless base station. When the activation signal is received (detected), the power of the wireless communication terminal is automatically turned on and the connection process with the wireless base station is performed, so that the user consciously turns on the power. There is no need to perform a closing operation, a wireless connection operation, or the like. Further, if the means (2) is employed, the operation of turning off the power of the wireless communication terminal need not be performed consciously. Therefore, the convenience of the user of the wireless communication terminal can be improved.

  In addition, since the power of the wireless communication terminal is automatically turned on, it is not necessary to keep the power on. In addition, since the power is automatically turned off when the connection with the radio base station is disconnected, it is possible to suppress wasteful power consumption when not connected to the radio base station (communication network).

  Moreover, even when the wireless communication terminal moves out of the service area by determining whether or not the wireless communication terminal is connected to the communication network with a timer as in the means of (3) above. The terminal status management server can instantly recognize that the wireless communication terminal is disconnected from the communication network.

  Further, as in the means of (4), the communication network is determined by referring to the terminal state management list to determine whether or not the call destination communication terminal is in a state in which a call with the communication terminal is possible. The call control is performed without checking whether the call destination communication terminal is connected and whether it is ready to respond to the call request signal. It can be carried out.

  At this time, the call request history is saved as in the means of (5), so that the wireless communication terminal is periodically turned on without being turned on and connected to the wireless base station. By connecting to a station (communication network), it is possible to easily confirm the presence or absence of a call request while in a disconnected state.

Hereinafter, the present invention will be described in detail together with embodiments (examples) with reference to the drawings.
In all the drawings for explaining the embodiments, parts having the same function are given the same reference numerals and their repeated explanation is omitted.

  In the wireless communication system of the present invention, an activation signal detecting means for detecting a radio signal (activation signal) for activating the wireless communication terminal is provided in a wireless communication terminal connectable to a certain network by wireless communication. Then, when the activation signal is detected by the activation signal detection means in an area (service area) where wireless connection with the network is possible, the wireless communication terminal is automatically turned on and connected to the network To do. In addition, for example, when the connection between the wireless communication terminal and the network is disconnected because the wireless communication terminal has gone out of the service area, the wireless communication terminal is disconnected. The power is automatically turned off when In this way, when the user of the wireless communication terminal consciously turns on the wireless information terminal in the service area, connects to the network, and further moves outside the service area, the power is turned off. No need to operate. In addition, when the connection between the wireless communication terminal and the network is disconnected, by automatically turning off the power of the wireless communication terminal, when the wireless communication terminal goes out of the service area, etc. An operation of searching for a wireless base station of the network in the wireless communication terminal and wasteful power consumption consumed in a standby state for accepting an operation from a user of the wireless communication terminal is suppressed.

  Further, in the wireless communication system of the present invention, while the wireless communication terminal is connected to the network, a terminal status message for notifying the terminal identifier that identifies the terminal and the current state of the terminal from the wireless communication terminal Is transmitted to the terminal state management server in the network at regular time intervals, and the current state of the wireless communication terminal that can be connected to the network according to the reception state of the terminal state message is transmitted to the terminal state management server. To grasp. In this way, when a communication terminal connected to the network attempts to connect to another communication terminal, a connection request is transmitted to the terminal state management server, and the other communication terminal is connected to the network. It is possible to confirm whether or not the connection is being made and whether or not the other communication terminal connected to the network is in a state where it can communicate with the own terminal.

  Furthermore, when the communication terminal transmits the connection request to the terminal state management server, when the other communication terminal is not connected to the network or the like, it is not in a state where it can communicate with the own terminal, A connection request from the communication terminal is stored in the terminal state management server as a connection request history. Then, when the other communication terminal is ready to communicate with the communication terminal, the connection request history is transferred from the terminal state management server to the other communication terminal. In this way, when the wireless communication terminal is connected to the network, the user of the wireless communication terminal requests the communication terminal that requested connection while not connected to the network, the requested time, etc. I was able to know automatically.

1 to 4 are schematic diagrams illustrating a schematic configuration of a wireless communication system according to a first embodiment of the present invention. FIG. 1 illustrates a configuration example of the entire system, and FIG. 2 illustrates a configuration example of a wireless communication terminal. 3 is a diagram illustrating a configuration example of a terminal state management server, and FIG. 4 is a diagram illustrating an example of a terminal state management list held by the terminal state management server.
In FIG. 1, 1 is a radio base station, 1A is a service area of the radio base station, 2 is a terminal state management server, 3 is a communication network, 4 is a radio communication terminal, 501 is an activation signal alarm, and 501A is an activation signal alarm. Notification area 502, an activation signal detector 502, and a communication terminal 6. In FIG. 2, 401 is a power switch, 402 is an input / output unit, 403 is a storage unit, 404 is a wireless communication unit, 405 is an automatic power-on unit, 406 is a terminal status message transmission unit, and 407 is a process control unit. . In FIG. 3, 201 is a communication means, 202 is a terminal state management list holding means, 203 is a timer management means, and 204 is a process control means.

  The wireless communication system according to the first embodiment is a system such as a public wireless LAN service system in which wireless base stations are discretely installed, and as shown in FIG. A wireless communication terminal 4 that can be connected to the communication network 3 by making a wireless connection between the communication network 3 to which the management server 2 is connected and the wireless base station 1; and the wireless communication terminal 4 An activation signal notifier 501 for notifying a wireless signal (activation signal) for activating the wireless communication terminal 4 in an area (service area) 1A in which wireless connection with the wireless base station 1 is possible, and the activation signal notifier The activation signal detector 502 detects the activation signal notified from 501. In FIG. 1, only one radio base station 1 is shown, but actually, a plurality of radio base stations may be installed. Similarly, only one activation signal annunciator 501 is shown in FIG. 1, but the present invention is not limited to this, and one activation signal alarm 501 is provided for one radio base station 1 or one radio base station 1. A plurality of them may be provided.

  At this time, the area (notification area) 501A for notifying the activation signal by the activation signal alarm 501 may be only a specific area in the service area 1A, as shown in FIG. The area may be almost the same as 1A. At this time, the activation signal detector 502 is connected to the wireless communication terminal 4 and detects the activation signal notified from the activation signal alarm 501 as shown in FIG. Then, a detection signal is transmitted to the wireless communication terminal, and the wireless communication device 4 is automatically turned on. In addition, the communication network 3 is not limited to the wireless communication terminal 4, for example, as shown in FIG. 1, a network to which a communication terminal 6 and a server (not shown) can be connected by a cable such as a LAN cable. Suppose that

  At this time, the wireless communication terminal 4 or the communication terminal 6 accesses the server via the communication network 3 to acquire desired information, or communicates with other terminals using an IP phone or messenger software. Can be.

  At this time, the wireless communication terminal 4 is a terminal such as a PDA, a notebook PC, or an IP telephone terminal with a built-in or externally connected wireless LAN device (function), as shown in FIG. A power switch 401 for turning on / off the power, an input / output means 402, a storage means 403, a wireless communication means (wireless LAN device) 404 for communicating with the wireless base station, and the activation signal detector 502. The automatic power-on means 405 for automatically turning on the power switch 401 in response to a detection signal from the power supply and the communication network 3 assigned to the terminal itself at regular intervals. The terminal state management server 2 connected to the communication network 3 by creating a terminal state message for notifying unique terminal information (terminal identifier) and the current state of the terminal itself It includes a terminal status message transmitting means 406 for signal, and a processing control unit 407 for controlling the processing performed by the own terminal. The input / output means 402 is, for example, a means comprising a combination of a touch panel and a stylus pen, and a combination of a liquid crystal display, a keyboard and a mouse (pointing device). In addition, the storage unit 403 is, for example, a unit in which a control program for processing performed in its own terminal such as a semiconductor memory or a hard disk or data is recorded. The wireless communication unit 404 may be, for example, a wireless communication unit built in the wireless communication terminal 4, or may be a PC card type or a memory card type inserted into an expansion slot of the wireless communication terminal 4. The wireless communication unit may be used.

  Further, as shown in FIG. 3, the terminal state management server 2 is configured to manage the current state of the communication means 201 that communicates with the communication network 3 and the communication terminals that can be connected to the communication network 3. A terminal state management list holding unit 202 for holding a management list, a timer management unit 203 for managing a timer for determining whether or not the wireless communication terminal 4 is connected to the communication network 3, and the terminal state And a process control unit 204 that controls processes performed in the management server 2. In addition, for example, when receiving a terminal status message from the wireless communication terminal 4, the timer management unit 203 sets and operates a timer in association with the terminal identifier of the wireless communication terminal 4, and the timer is in operation. If the terminal status message having the terminal identifier is received, the timer is reset and activated. If there is a timer that has timed out, the wireless communication terminal 4 to which the terminal identifier associated with the timer is assigned determines that the connection with the communication network 3 has been disconnected.

  In addition, as shown in FIG. 4, for example, the terminal status management list includes unique terminal information (terminal identifier) assigned to each communication terminal that can be connected to the communication network 3, and whether the terminal status management list is connected to the network. It is associated with the current state of the communication terminal, such as whether or not. At this time, the terminal identifier specifies the wireless communication terminal 4 or the communication terminal 6 connected to the communication network 3, and an IP address, a MAC address, a telephone number, a terminal manufacturing number, or the like is used. Further, as shown in FIG. 4, for example, the state of the terminal includes a state of being connected to the communication network, not connected (disconnected) to the communication network, being in a call, and the like.

  In addition, the activation signal notification device 501 is a signal having a frequency different from the signal frequency of the wireless communication performed between the wireless communication terminal 4 and the wireless base station 1, such as an RFID transmitter. This is a notification device (for example, literature: Daiki Shibayama, Junichi Iwatani, Osamu Katagami, Hiroshi Kitajo, "Examination of information acquisition system using RFID-Overview and hardware", IEICE 2004 General Conference, (See March 2004, B-5-138, p.625). At this time, for example, the activation signal detector 502 is configured to detect the detection signal (activation signal) when the collated ID matches the antenna that receives the activation signal, the reception ID collating unit that collates the ID of the received RF signal. ) To output a start signal. Note that the combination of the activation signal notification device 501 and the activation signal detector 502 is not limited to the combination of the RFID transmitter and the RFID receiver, and can be realized by various communication means.

  FIG. 5 is a flowchart for explaining the operation of the wireless communication terminal in the wireless communication system of the first embodiment. FIG. 6 is a flowchart for explaining the operation of the terminal information management server in the wireless communication system of the first embodiment.

  In the wireless communication system according to the first embodiment, the user of the wireless communication terminal 4 carries the activation signal detector 502 with the wireless communication terminal 4. At this time, the wireless communication terminal 4 is driven by a battery. If the power is always turned on, the power consumption is large and the usable time is shortened. Therefore, when not in use, it is common to carry with the power off. At this time, the activation signal detector 502 intermittently performs an activation signal reception operation with a weak power regardless of the power on / off state of the wireless communication terminal 4.

  At this time, when the user of the wireless communication terminal 4 enters the service area 1A of the wireless base station 1 while carrying the wireless communication terminal 4, and further enters the notification area 501A of the activation signal notification device 501, FIG. 5, the activation signal detector 502 connected to the wireless communication terminal 4 detects the activation signal and outputs a detection signal to the automatic power-on means 405 of the wireless communication terminal 4 (step 701). . Then, the passive power-on means 405 determines whether or not the power is on (step 702). If the power is off, the power switch 401 is turned on to turn on the power, and the wireless communication The terminal 4 is activated (step 703).

  In the wireless communication terminal 4, when the activation processing is completed, the processing control means 407 performs wireless connection processing with the wireless base station 1 using the wireless communication means 404 (step 704). If authentication is required during wireless connection, authentication processing is also performed in step 704. When the wireless connection is established and communication through the communication network 3 is possible, the processing control unit 407 uses the terminal state message transmission unit 406 to change the terminal identifier of the terminal itself and the state of the terminal. Transmission of the terminal status message is started (step 705). Thereafter, the wireless communication terminal 4 executes arbitrary processing based on the user's operation such as acquisition of information from the information providing server connected to the communication network 3 and communication with other communication terminals. (Step 706). At this time, the wireless communication terminal 4 continues to send the terminal state message to the terminal state management server 2 at a constant cycle. At this time, the wireless communication unit 404 and the processing control unit 407 of the wireless communication terminal 4 confirm whether or not the connection with the wireless base station 1 is disconnected (step 707), and is not disconnected. In this case, the transmission process of step 806 and the terminal status message is continued.

  If the wireless communication means 404 of the wireless communication terminal 4 cannot communicate with the wireless base station 1 because the user goes out of the service area 1A or the like, and the connection is disconnected, the wireless communication As shown in FIG. 5, the processing control unit 407 of the terminal 4 terminates the terminal state message transmission unit 406 to transmit the terminal state message, turns off the power switch 401, and turns off the power (step 708).

  On the other hand, the terminal state management server 2 is always connected to the communication network 3 and is waiting in a state where the terminal state message transmitted from the wireless communication terminal 4 can be received. Then, as shown in FIG. 6, when the terminal status message is received (step 801), the process control means 204 of the terminal status management server 2 uses the timer management means 203 and the terminal included in the terminal status message. The timer associated with the identifier is set or reset to operate (step 802). In step 802, if the timer associated with the terminal identifier included in the terminal status message has already been activated, the timer manager 203 resets the activated timer to operate. Further, the time of the timer is a time when the terminal state message is transmitted from the wireless communication terminal 4 in consideration of a transmission delay of the terminal state message depending on the traffic state of the communication network 3, for example. The timer is preferably set longer than the interval. For example, if the wireless communication terminal 4 transmits the terminal status message at intervals of 3 seconds, the timer is set to 5 seconds, for example.

  Further, the processing control means 204 of the terminal state management server 2 operates by setting or resetting the timer, and the terminal state of the received terminal information message and the terminal information message in the terminal state management list The terminal statuses associated with the terminal identifiers included in are checked (step 803), and the same status is confirmed (step 904). If it is not the same state, the terminal state in the terminal state management list is rewritten to the terminal state of the received terminal information message (step 805).

  At this time, the timer management unit 203 monitors whether there is a timer that has timed out among the timers operated in step 802 (step 806). If there is a timer that has timed out, for example, the terminal identifier associated with the timer is notified to the processing control means 204. At this time, the processing control means 204 rewrites the state of the terminal with the terminal identifier associated with the timed-out timer in the terminal state management list to “not connected to communication network” (step 807).

  In the wireless communication system of the first embodiment, the wireless communication terminal 4 and the terminal state management server 2 perform operations (processes) as shown in FIGS. 5 and 6, respectively. Then, next, the temporal relationship of the flow of processing performed by the wireless communication terminal 4 and the terminal state management server 2 on the wireless communication system will be described.

  7 and 8 are schematic diagrams for explaining the overall operation in the wireless communication system according to the first embodiment. FIG. 7 is a sequence diagram showing the overall operation flow. FIG. It is a figure which shows the mode of a change of a list. In the sequence of FIG. 7, the time axis is from the upper side to the lower side of the page.

  In the wireless communication system according to the first embodiment, the terminal state management server 2 is always connected to the communication network 3 as described above, and can receive a terminal state message from the wireless communication terminal 4. ing.

  At this time, for example, when a user carrying the wireless communication terminal 4 in a state where the power switch 401 is turned off and turned off enters the notification area 501A of the activation signal notification device 501, as shown in FIG. The activation signal notified from the activation signal alarm 501 is detected by the activation signal detector 502 connected to the wireless communication terminal 4, and the detection signal is input to the automatic power-on means 405 of the wireless communication terminal 4. (Steps 901, 902).

  When the detection signal is input, the automatic power-on means 405 turns on the power switch 401 and starts wireless connection with the wireless base station 1 (steps 903 and 904). Then, when the wireless connection between the wireless communication terminal 4 and the wireless base station 1 is established, and the wireless communication terminal 4 becomes connectable to the communication network 3, the wireless communication terminal 4 transmits the terminal state management server. 2, the terminal status message is transmitted at regular time intervals (step 905). At this time, when the terminal state management server 2 receives the terminal state message first transmitted from the wireless communication terminal 4, the timer management unit 203 sets and operates a timer (step 906a). When a new terminal status message is received from the wireless communication terminal 4 while the timer is operating, the operating timer is reset (step 906b) to operate.

  Although not shown in FIG. 7, the terminal state management server 2 that has received the terminal state message from the wireless communication terminal 4 sets the terminal state when the timer is set and activated in step 906a. The terminal state of the wireless communication terminal 4 in the management table is rewritten. At this time, if the terminal identifier of the wireless communication terminal 4 is “terminal A”, the terminal status message transmitted from the wireless communication terminal 4 has the terminal identifier “terminal A” and the terminal status is “communication”. "Connecting to network". On the other hand, in the terminal state management table, as shown in the upper part of FIG. 8, the state of the terminal whose terminal identifier is “terminal A” is “not connected to the communication network”. Therefore, the terminal status management table is rewritten from “not connected to communication network” to “connected to communication network” from “not connected to communication network” as shown in the middle of FIG. It is done.

  The terminal status message received after the status of the terminal is rewritten as “connected to communication network”, that is, when the timer is reset and activated in step 906b, the terminal identifier is “terminal A”. Yes, and the terminal status is “Connecting to communication network”. In the terminal state management table, the state of the terminal whose terminal identifier is “terminal A” is already “connected to the communication network”. Therefore, when the step 906b is performed, it is not necessary to rewrite the terminal state management table.

  When the user of the wireless communication terminal 4 goes out of the service area 1A of the wireless base station 1, the wireless connection between the wireless communication terminal 4 and the wireless base station 1 is disconnected, and the wireless communication terminal 4 The power switch is turned off and the power is turned off (steps 907 and 908). At this time, the wireless communication terminal 4 has finished transmitting the terminal status message. Therefore, when the timer reset in conjunction with the terminal information message last received from the wireless communication terminal 4 has timed out (step 909), the terminal state management server 2 and the communication network 3 Is determined to have been disconnected. Then, the terminal state management server 2 rewrites the state of the wireless communication terminal 4 in the terminal state management table (step 910).

  While the terminal state management table of the terminal state management server 2 receives the terminal information message from the wireless communication terminal 4 and resets the timer (step 906b) and operates, as shown in the middle part of FIG. The state of the terminal of the wireless communication terminal 4 (terminal identifier “terminal A”) is “connecting to communication network”. Then, when the timer that has been reset and operated in Step 906b times out, it is determined that the connection between the wireless communication terminal 4 and the communication network 3 has been disconnected. Therefore, in Step 910, the terminal status management table includes: The state of the terminal of the wireless communication terminal 4 (terminal identifier “terminal A”) is rewritten from “connected to communication network” to “not connected to communication network” as shown in the lower part of FIG.

  As described above, according to the wireless communication system of the first embodiment, the user carrying the wireless communication terminal 4 enters the service area 1A of the wireless base station 1 (the notification area 501A of the activation signal notification device 501). Even when the wireless communication terminal 4 is turned off, it can be automatically turned on and connected to the communication network 3. When the user goes out of the service area 1A of the radio base station 1, the power can be automatically turned off when the radio connection between the radio communication terminal 4 and the radio base station 1 is disconnected. . Therefore, the user does not need to consciously perform the power-on operation of the wireless communication terminal 4 in the service area 1A, the connection operation to the communication network 3, and the power-off operation when moving outside the service area 1A. .

  Further, when the user enters the service area 1A of the radio base station 1 (the notification area 501A of the activation signal alarm 501), the power is automatically turned on even if the radio communication terminal 4 is turned off. When the user goes out of the service area 1A of the wireless base station 1, the wireless communication terminal 4 can be automatically turned off. Therefore, as in the conventional case, it is possible to suppress wasteful power consumption such as wasteful standby power by being carried with the power always turned on and power consumed by the search for the connectable wireless base station 1. it can.

  In addition, the terminal state management server 2 sets or resets a timer every time it receives a terminal state message transmitted from the wireless communication terminal 4 at a predetermined time interval. It is possible to grasp that the connection of the communication network 3 is disconnected, and it is possible to easily manage the connection state of communication terminals that can be connected to the communication network 3.

  FIG. 9 is a schematic diagram illustrating a schematic configuration of the wireless communication system according to the second embodiment of the present invention, and illustrates a configuration example of a terminal state management server according to the second embodiment.

  In the second embodiment, in the wireless communication system described in the first embodiment, for example, when a call using IP telephone or communication using messenger software is performed between two or more communication terminals, the terminal state management list is displayed. A wireless communication system in which it is possible to confirm whether or not a communication terminal to be called using is connected to the communication network 3 will be described.

  The overall configuration of the wireless communication system according to the second embodiment is the same as the configuration illustrated in FIG. The configuration and operation of the wireless communication terminal 4 may be the same as the configuration shown in FIG. 2 and the operation shown in FIG. However, when making an IP phone as in the second embodiment, the wireless communication terminal 4 is provided with a calling means such as a microphone and headphones for calling.

  In the wireless communication system according to the second embodiment, the terminal state management server is configured such that the communication unit 201, the terminal state management list holding unit 202, the timer management unit 203, and the process control unit 204, as shown in FIG. In addition, call control means 205 for controlling a telephone call such as an IP phone is provided. The call control unit 205 is a unit that controls a telephone call using, for example, SIP (Session Initiation Protocol).

  FIG. 10 is a flowchart for explaining the operation of the terminal information management server in the wireless communication system according to the second embodiment.

  In the wireless communication system of the second embodiment, the terminal state management server 2 is connected to the communication network 3 in addition to the management of the connection state of communication terminals connectable to the communication network 3 described in the first embodiment. Controls telephone calls between communication terminals. At this time, the terminal state management server 2 receives a signal for controlling a telephone call (telephone call control signal) in addition to the terminal state message. Therefore, in the terminal state management server 2, first, as shown in FIG. 10, when a signal is received from an external communication terminal (step 808), whether the received signal is the terminal state message or the telephone call control signal. Is determined (step 809). At this time, if the received signal is the terminal status message, the processing from step 801 to step 807 is performed as shown in FIG. Since the processing from Step 801 to Step 807 may be performed from Step 801 to Step 807 shown in FIG. 6, detailed description thereof will be omitted.

  On the other hand, if the received signal is a telephone call control signal, the processing control means 204 of the terminal state management server 2 causes the call control means 205 to execute control of the telephone call. At this time, as shown in FIG. 10, the call control means 205 first determines whether the telephone call control signal is a call signal or a response signal to the call signal (step 810). At this time, if it is the call signal, the call control means 205 refers to the connection state management list based on the terminal identifier of the call destination terminal included in the call signal, and the state of the communication terminal to be called is “to communication network”. It is confirmed whether it is “connected” (step 811). If the state of the calling communication terminal is “connected to communication network”, the calling signal is subjected to predetermined processing and transmitted to the called communication terminal (step 812). In addition, when the state of the communication terminal to be called is “not connected to a communication network” or “busy”, and the communication terminal that has transmitted the call signal cannot communicate, the communication terminal that has transmitted the call signal To notify that it is not possible to make a call (step 813).

  If it is determined in step 810 that the telephone call control signal is a response signal to the call signal, the response signal is subjected to predetermined processing and the communication terminal that has transmitted the call signal transmits the call signal to the communication terminal. The response signal is transferred (step 814).

  In the wireless communication system according to the second embodiment, the wireless communication terminal 4 and the terminal state management server 2 perform operations (processes) as shown in FIGS. 5 and 10, respectively. Then, next, the temporal relationship of the flow of processing performed by the wireless communication terminal 4 and the terminal state management server 2 on the wireless communication system will be described. In the following description, the case where an IP phone call is made from the communication terminal 6 to the wireless communication terminal 4 in the wireless communication system shown in FIG. 1 will be described as an example.

  FIG. 11 and FIG. 12 are schematic diagrams for explaining the overall operation in the wireless communication system of the second embodiment. FIG. 11 places an IP phone call to the wireless communication terminal while the wireless communication terminal is connected. FIG. 12 is a sequence diagram when an IP phone call is made to the wireless communication terminal when the wireless communication terminal is not connected. In the sequence of FIGS. 11 and 12, the time axis is from the upper side to the lower side of the page.

  In the wireless communication system according to the second embodiment, the terminal state management server 2 is always connected to the communication network 3 as described above, and terminal state messages from the wireless communication terminal 4 and the communication terminal 6 The telephone call control signal can be received.

  Here, as shown in FIG. 11, the wireless communication terminal 4 is first in the service area 1A of the wireless base station 1, and is wirelessly connected to the wireless base station 1, that is, connected to the communication network 3. (Step 911).

  At this time, if an IP phone call is made from the communication terminal 6 to the wireless communication terminal 4, first, as shown in FIG. 11, a call request signal is transmitted from the communication terminal 6 to the terminal state management server 2 ( Step 912). When the terminal state management server 2 receives the call request signal, the processing from step 810 to step 813 shown in FIG. 10 is performed. That is, as shown in FIG. 11, the terminal state management server 2 searches the terminal state management table based on the terminal identifier of the call destination included in the call request signal, and the wireless communication terminal 4 of the call destination. It is checked whether the state of “is connected to the communication network” (step 913). At this time, if the state of the called wireless communication terminal 4 is “connected to a communication network”, the terminal state management server 2 performs a predetermined process on the call request signal, and the wireless communication terminal A call signal is transmitted to 4 (step 914).

  And when the said radio | wireless communication terminal 4 receives the said call signal, it performs the response process with respect to the said call signal (step 915), and returns a response signal to the said terminal state management server 2 (step 916). At this time, the terminal state management server 2 performs the process of step 814 shown in FIG. Then, call connection setting is performed (step 917), and a response signal subjected to predetermined processing is transferred to the communication terminal 6 that has transmitted the call signal (step 918).

  As a result, a call setting between the communication terminal 6 and the wireless communication terminal 4, for example, a session in SIP communication is established, and a call between the communication terminal 6 and the wireless communication terminal 4 becomes possible (step). 919). When a call is made between the communication terminal 6 and the wireless communication terminal 4, the call information such as voice does not need to pass through the terminal state management server 2, and can be directly communicated between the terminals.

  Although detailed description is omitted, when the call between the communication terminal 6 and the wireless communication terminal 4 is terminated, for example, if a call termination process is executed via the terminal state management server 2 Good.

  On the other hand, for example, as shown in FIG. 12, when the wireless communication terminal 4 is in a disconnected state with the wireless base station 1, that is, in a disconnected state with the communication network 3, the terminal state management is performed by the communication terminal 6. When a call request signal is transmitted to the server 2 (step 912) and the state of the wireless communication terminal 4 is retrieved from the terminal state management list (step 913), the state of the wireless communication terminal 4 is “not in communication network”. "Connected". Therefore, the call control means 205 of the terminal state management server 2 searches the communication terminal 6 without searching for a communication terminal connected to the communication network 3 and confirming whether the wireless communication terminal 4 is connected. The wireless communication terminal 4 can notify that it is disconnected from the communication network 3 (step 920).

  Although the detailed description is omitted, even when the wireless communication terminal 4 is connected to the communication network 3, there is a case where the call from the communication terminal 6 cannot be answered due to a reason such as a call with another communication terminal. The call control means 205 of the terminal state management server 2 searches the terminal state management list to determine that the state of the wireless communication terminal 4 is “busy” and cannot respond. 6 can be notified. Therefore, the call control means 205 of the terminal state management server 2 searches the communication terminal 6 without searching for a communication terminal connected to the communication network 3 and confirming whether the wireless communication terminal 4 is connected. The wireless communication terminal 4 can notify that it cannot respond.

  As described above, according to the wireless communication system of the second embodiment, when making an IP phone call from the communication terminal 6 to the wireless communication terminal 4, a call request is sent from the communication terminal 6 to the terminal state management server 2. The terminal state management list held by the terminal state management server is transmitted, and whether or not the call destination communication terminal (wireless communication terminal 4) can communicate with the communication terminal 6 is determined. judge. If the call is possible, the call request signal is transmitted to the wireless communication terminal 4, and if the call is not possible, the communication terminal 6 is notified that it cannot respond. At this time, in the terminal status management list, the communication network 3 at the same time as the time when the communication terminal 6 transmits the call request signal is obtained by the process (operation) described in the first embodiment. The state of the connectable communication terminal is described. Therefore, a search is made for a communication terminal connected to the communication network 3, whether or not the call destination communication terminal (wireless communication terminal 4) is connected, and whether or not the call request signal can be answered. It is possible to control telephone calls without confirming whether or not.

  In the second embodiment, the case where an IP phone call is made from the communication terminal 6 to the wireless communication terminal 4 is taken as an example. However, the present invention is not limited to this, and an IP phone call is made from the wireless communication terminal 4 to the communication terminal 6. When making a call, the terminal state management list indicates whether the communication terminal 6 is connected to the communication network 3 and can respond to the call request signal in the same procedure. The telephone call can be controlled without searching for a communication terminal connected to the communication network 3.

  Still further, the combination of communication terminals that make a call by IP telephone may be, for example, communication terminals connected to the communication network 3 by wire, such as the communication terminal 6, or the wireless communication terminal 4, wireless communication terminals connected to the communication network 3 via the wireless base station 1 may be used.

  In the second embodiment, the case where a telephone call is made between the communication terminal 6 and the wireless communication terminal 4 is described as an example. However, the present invention is not limited to this. For example, communication using messenger software is performed. When calling another communication terminal from a certain communication terminal, the call control is performed by the method described in the second embodiment, so that the call can be made without searching for the communication terminal connected to the communication network 3. Can be controlled.

  13 and 14 are schematic diagrams showing a schematic configuration of the wireless communication system according to the third embodiment of the present invention. FIG. 13 is a diagram showing a configuration example of the terminal state management server according to the third embodiment. FIG. It is a figure which shows the example of a request history.

  In the second embodiment, referring to the terminal state management list held by the terminal state management server, when performing a telephone call by IP phone or communication using messenger software between two or more communication terminals, The configuration of the wireless communication system and the call control method capable of performing call control without searching for a communication terminal connected to the communication network 3 have been described.

  However, in the control method of the second embodiment, for example, when there is a call request from another communication terminal 6 while the wireless communication terminal 4 is not connected to the communication network 3, the wireless communication terminal 4 Users cannot know that. Therefore, in the third embodiment, the user of the wireless communication terminal 4 can easily understand that a call request is received from another communication terminal 6 while the wireless communication terminal 4 is not connected to the communication network 3. A configuration of a wireless communication system that can be known and a method of call control will be described.

  The overall configuration of the wireless communication system according to the third embodiment is the same as the configuration illustrated in FIG. The configuration and operation of the wireless communication terminal 4 may be the same as the configuration shown in FIG. 2 and the operation shown in FIG. However, when making an IP phone as in the second embodiment, the wireless communication terminal 4 is provided with a calling means such as a microphone and headphones for calling.

  In the wireless communication system according to the third embodiment, the terminal state management server includes the communication unit 201, terminal state management list holding unit 202, timer management unit 203, processing control unit 204, as shown in FIG. In addition to the call control means 205, there is provided a call request history 206 for storing a call request when the call destination communication terminal cannot respond to the call request. At this time, the call control means 205 is a means for controlling a telephone call using SIP (Session Initiation Protocol), for example.

  Further, the call request history is stored for each call destination terminal (terminal identifier) included in the call request signal. For example, as shown in FIG. 14, the call request signal is transmitted at the date and time when the call request signal is received. Information such as the terminal identifier of the terminal (source terminal) and presence / absence of a message. The message is, for example, information indicating the presence or absence of a voice message from the user of the source terminal. In FIG. 14, the call request history includes information indicating the presence / absence of a message, but this information may not be included.

  15 and 16 are flowcharts for explaining the operation of the terminal information management server in the wireless communication system according to the third embodiment. FIG. 15 is a flowchart for explaining the overall operation. FIG. FIG. 16 is a flowchart for explaining detailed operation (processing) in step 816 in FIG. 15.

  In the wireless communication system of the third embodiment, the basic operation of the terminal state management server 2 is the same as the operation of the terminal state management server 2 in the wireless communication system of the second embodiment. Therefore, detailed description of steps for performing the same operation (process) as the operation (process) of the terminal state management server 2 in the wireless communication system of the second embodiment is omitted.

  In the terminal state management server 2 in the wireless communication system of the third embodiment, as shown in FIG. 15, the received signal from the external communication terminal is a call signal (call request signal), and the terminal state management list is referred to. If the call destination terminal is in a state where it cannot answer, the call request history stores the call date and time, the terminal identifier of the caller terminal, the presence / absence of a message, etc., instead of step 813 shown in FIG. Then, the sender terminal is notified that it cannot respond (step 815). At this time, if the terminal state management server 2 can store a message such as a voice message, for example, it cannot respond to the caller terminal by a method such as a conventional answering machine service. In addition to notifying that the message can be left, when the message is transmitted from the source terminal, the message is stored together with the call request history. Note that steps 808 to 812 and step 814 in FIG. 15 may be the same processing as steps 808 to 812 and step 814 in FIG.

  Further, in the terminal state management server 2 in the wireless communication system of the third embodiment, when the signal received from the external communication terminal is a terminal state message, it corresponds to the steps 801 to 807 described in the first embodiment. (Step 816).

  However, in the third embodiment, as shown in FIG. 16, after rewriting the terminal state in the terminal state management list as necessary in the steps 804 and 805, the terminal state in the terminal state management list is changed to “ It is confirmed whether or not it has been rewritten to “connected to communication system” (step 817), and when rewritten to “connected to communication system”, the call request history is transmitted to the communication terminal that transmitted the terminal status message ( Step 818). Note that steps 808 to 812 and step 814 in FIG. 16 may be the same as steps 808 to 812 and step 814 in FIG.

  In the wireless communication system according to the third embodiment, the wireless communication terminal 4 and the terminal state management server 2 perform operations (processes) as shown in FIGS. 5, 15, and 16, respectively. Then, next, the temporal relationship of the flow of processing performed by the wireless communication terminal 4 and the terminal state management server 2 on the wireless communication system will be described. In the following description, the case where an IP phone call is made from the communication terminal 6 to the wireless communication terminal 4 in the wireless communication system shown in FIG. 1 will be described as an example.

  FIG. 17 is a schematic diagram for explaining the overall operation in the wireless communication system according to the third embodiment, and is a sequence diagram when an IP phone is placed on the wireless communication terminal when the wireless communication terminal is not connected. It is. In the sequence of FIG. 17, the time axis is from the upper side to the lower side of the page.

  In the wireless communication system according to the third embodiment, the terminal state management server 2 is always connected to the communication network 3 as described above, and terminal state messages from the wireless communication terminal 4 and the communication terminal 6 The telephone call control signal can be received.

  Here, it is assumed that the wireless communication terminal 4 is initially disconnected from the wireless base station 1, that is, not connected to the communication network 3, as shown in FIG. At this time, when a call request signal is transmitted from the communication terminal 6 to the terminal state management server 2 (step 912) and the state of the wireless communication terminal 4 is searched from the terminal state management list (step 913), the wireless communication The state of the terminal 4 is “not connected to the communication network”. Therefore, the call control means 205 of the terminal state management server 2 searches the communication terminal 6 without searching for a communication terminal connected to the communication network 3 and confirming whether the wireless communication terminal 4 is connected. The wireless communication terminal 4 can notify that it is not connected to the communication network 3. At this time, the call control means 205 stores the call date and time, the terminal identifier of the communication terminal 6, and the presence / absence of a message in the call request history (step 921). At this time, if the terminal state management server 2 can store a message such as a voice message, for example, it cannot respond to the caller terminal by a method such as a conventional answering machine service. In addition to notifying that the message can be left, when the message is transmitted from the source terminal, the message is stored together with the call request history.

  Although the detailed description is omitted, even when the wireless communication terminal 4 is connected to the communication network 3, there is a case where the call from the communication terminal 6 cannot be answered due to a reason such as a call with another communication terminal. The call control means 205 of the terminal state management server 2 searches the terminal state management list to determine that the state of the wireless communication terminal 4 is “busy” and cannot respond. 6 can be notified. Therefore, the call control means 205 of the terminal state management server 2 searches the communication terminal 6 without searching for a communication terminal connected to the communication network 3 and confirming whether the wireless communication terminal 4 is connected. The wireless communication terminal 4 can notify that it cannot respond. Then, the call control means 205 stores the call date and time, the terminal identifier of the communication terminal 6, and the presence / absence of a message in the call request history.

  When a user carrying the wireless communication terminal 4 enters the service area 1A of the wireless base station 1 (notification area 501A of the activation signal alarm 501) after a certain amount of time has elapsed, the activation signal alarm 501 The activation signal detector 502 detects the activation signal notified from the terminal, and the detection signal is input to the wireless communication terminal 4 (steps 901 and 902). At this time, as described in the first embodiment, the wireless communication terminal 4 is automatically turned on, wirelessly communicates with the wireless base station 1, and can be connected to the communication network 3 ( Steps 903, 904). Then, transmission of a terminal status message to the terminal status management server 2 is started (step 905).

  At this time, the terminal state management server 2 that has received the terminal state message first transmitted from the wireless communication terminal 4 performs processing as shown in FIG. At this time, in step 805, the state of the terminal in the terminal state management list associated with the terminal identifier of the wireless communication terminal 4 is rewritten from “not connected to communication network” to “connected to communication network”. Therefore, the terminal state management server 2 searches whether the call request history having the same terminal identifier as the terminal identifier of the wireless communication terminal 4 is held in the call request history holding means 206 (step 922) and is held. If so, the call request history is transmitted to the wireless communication terminal 4 (step 923). In this way, the user of the wireless communication terminal 4 can easily know that a call request has been received from another communication terminal 6 while the wireless communication terminal 4 is not connected to the communication network 3. be able to. At this time, if the call request history includes information indicating the presence / absence of a message as shown in FIG. 14, not only the information of the communication terminal that has transmitted the call request signal but also processing such as the presence / absence of a message and confirmation of the message are performed. Can be done together.

  As described above, according to the wireless communication system of the third embodiment, when an IP phone call is made from the communication terminal 6 to the wireless communication terminal 4, the wireless communication terminal 4 cannot respond. The call request history is saved. Then, when the wireless communication terminal 4 rewrites the state of the terminal in the terminal state list based on the terminal state message, such as when the wireless communication terminal 4 is connected to the communication network 3, The call request history is transmitted to the wireless communication terminal 4. In this way, while the wireless communication terminal 4 is not connected to the communication network 3 or during a call with another communication terminal, a call request is received from another communication terminal 6. The user of the wireless communication terminal 4 can easily know. At this time, if the call request history includes information indicating the presence / absence of a message as shown in FIG. 14, not only the information of the communication terminal that has transmitted the call request signal but also processing such as the presence / absence of a message and confirmation of the message are performed. Can be done together.

  In the third embodiment, the case where an IP phone call is made from the communication terminal 6 to the wireless communication terminal 4 is taken as an example. When calling, if the communication terminal 6 cannot respond, the call request history is saved in the same procedure, and the terminal status in the terminal status list is changed based on the terminal status message from the communication terminal 6. When the call request history is rewritten to “connected to communication system”, the call request history is transmitted to the communication terminal 6 so that the call request during which the communication terminal 6 cannot respond can be easily known.

  Still further, the combination of communication terminals that make a call by IP telephone may be, for example, communication terminals connected to the communication network 3 by wire, such as the communication terminal 6, or the wireless communication terminal 4, wireless communication terminals connected to the communication network 3 via the wireless base station 1 may be used.

  Further, in the third embodiment, the case where a telephone call is made between the communication terminal 6 and the wireless communication terminal 4 is described as an example. However, the present invention is not limited to this. For example, communication using messenger software is performed. When calling another communication terminal from a certain communication terminal, etc., the call during the time when the wireless communication terminal 4 or the communication terminal 6 could not respond by controlling the call by the method described in the third embodiment. The request can be easily known.

  The present invention has been specifically described above based on the above-described embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. is there.

  For example, in the first to third embodiments, the information on the terminals held and managed in the terminal state management table is, for example, “connected to communication network” or “not connected to communication network” as shown in FIG. ”And“ busy ”, but not limited to this, it is an expression that can distinguish the terminal status such as“ connected to communication network ”,“ not connected to communication network ”,“ busy ” Any format can be used. Also, the type of the state of the terminal is not limited to the three types of “connected to communication network”, “not connected to communication network”, and “busy”, but other states or more detailed states can be set. Also good.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows schematic structure of the radio | wireless communications system of Example 1 by this invention, and is a figure which shows the structural example of the whole system. It is a schematic diagram which shows schematic structure of the radio | wireless communications system of Example 1 by this invention, and is a figure which shows the structural example of a radio | wireless communication terminal. It is a schematic diagram which shows schematic structure of the radio | wireless communications system of Example 1 by this invention, and is a figure which shows the structural example of a terminal state management server. It is a schematic diagram which shows schematic structure of the radio | wireless communications system of Example 1 by this invention, and is a figure which shows the example of the terminal state management list which a terminal state management server hold | maintains. FIG. 3 is a flowchart for explaining the operation of the wireless communication terminal in the wireless communication system according to the first embodiment. It is a flowchart for demonstrating operation | movement of the terminal information management server in the radio | wireless communications system of a present Example 1. FIG. FIG. 5 is a schematic diagram for explaining an overall operation in the wireless communication system according to the first embodiment, and is a sequence diagram illustrating a flow of the overall operation. It is a schematic diagram for demonstrating the whole operation | movement in the radio | wireless communications system of a present Example 1, and is a figure which shows the mode of a change of a terminal information management list. It is a schematic diagram which shows schematic structure of the radio | wireless communications system of Example 2 by this invention, and is a figure which shows the example of a structure of the terminal state management server in this Example 2. FIG. It is a flowchart for demonstrating operation | movement of the terminal information management server in the radio | wireless communications system of the present Example 2. It is a schematic diagram for demonstrating the whole operation | movement in the radio | wireless communications system of the present Example 2, and is a sequence diagram when an IP telephone is made to the said radio | wireless communication terminal while the radio | wireless communication terminal is connecting. It is a schematic diagram for demonstrating the whole operation | movement in the radio | wireless communications system of the present Example 2, and is a sequence diagram when making an IP telephone call to the said radio | wireless communication terminal when a radio | wireless communication terminal is a non-connection. It is a schematic diagram which shows schematic structure of the radio | wireless communications system of Example 3 by this invention, and is a figure which shows the example of a structure of the terminal state management server in this Example 3. FIG. It is a schematic diagram which shows schematic structure of the radio | wireless communications system of Example 3 by this invention, and is a figure which shows the example of a call request log | history. It is a flowchart for demonstrating operation | movement of the terminal information management server in the radio | wireless communications system of the present Example 3, and is a flowchart for demonstrating whole operation | movement. FIG. 16 is a flowchart for explaining the operation of the terminal information management server in the wireless communication system according to the third embodiment, and is a flowchart for explaining detailed operation (processing) of step 816 in FIG. 15. It is a schematic diagram for demonstrating the whole operation | movement in the radio | wireless communications system of the present Example 3, and is a sequence diagram when making an IP telephone call to the said radio | wireless communication terminal when a radio | wireless communication terminal is a non-connection.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Wireless base station 1A ... Wireless base station service area 2 ... Terminal state management server 201 ... Communication means 202 ... Terminal state management list holding means 203 ... Timer management means 204 ... Processing control means 205 ... Call control means 206 ... Call request History holding means 3 ... Communication network 4 ... Wireless communication terminal 401 ... Power switch 402 ... Input / output means 403 ... Storage means 404 ... Wireless communication means 405 ... Automatic power on means 406 ... Terminal status message transmission means 407 ... Processing control means 501 ... Activation signal alarm 501A ... Notification area of activation signal alarm 502 ... Activation signal detector 6 ... Communication terminal

Claims (16)

A communication network to which a wireless base station and a terminal state management server are connected, a wireless communication terminal capable of connecting to the communication network by performing wireless connection with the wireless base station, and the wireless communication terminal An activation signal notifier for notifying a radio signal (hereinafter referred to as an activation signal) for activating the wireless communication terminal within an area (hereinafter referred to as a service area) in which wireless connection with the radio base station is possible; and the activation signal A wireless communication system comprising an activation signal detector for detecting the activation signal notified from an alarm device,
The activation signal detector is connected to the wireless communication terminal;
The wireless communication terminal is configured to automatically power on the wireless communication terminal based on a detection signal output when the activation signal detector detects the activation signal; and the wireless communication terminal After being connected to the radio base station, while being connected to the radio base station, a terminal status message including a unique terminal identifier assigned to the own terminal and the status of the own terminal is transmitted at regular time intervals. Terminal status message transmitting means that continues to transmit to the terminal status management server,
The terminal state management server comprises means for holding a terminal state management list in which a unique terminal identifier assigned to each communication terminal connectable to the communication network is associated with a state of the communication terminal,
Each time the terminal state management server receives the terminal state message from the wireless communication terminal, the terminal state included in the terminal state message and the terminal included in the terminal state message in the terminal state management list The terminal status associated with the same terminal identifier as the identifier is compared, and if the status of each terminal is different, the status of the terminal in the terminal status management list is rewritten to the status of the terminal in the terminal status message. A wireless communication system.   The wireless communication system according to claim 1, wherein the wireless information terminal includes means for turning off the power of the wireless information terminal when the connection with the wireless base station is disconnected. The terminal state management server includes timer management means for setting and resetting a timer associated with a terminal identifier included in the terminal state message each time the terminal state message is received from the wireless communication terminal.
If there is a timer that has timed out among the active timers, the terminal state of the terminal identifier associated with the timed-out timer in the terminal state management list is changed to a state that is not connected to the communication network. The wireless communication system according to claim 2, wherein the wireless communication system is rewritten. The terminal state management server includes a call control means for controlling a call when performing communication between two or more communication terminals and a response to the call,
When the call control means receives a call request signal from a communication terminal connected to the communication network, the call control means refers to the terminal state management list, and the call destination communication terminal is in a state where it can respond. Transmits the call request signal to the call destination communication terminal, and if the call destination communication terminal is in a state where a response is not possible, notifies the communication terminal which has transmitted the call request signal that the response is impossible. The radio communication system according to any one of claims 1 to 3, wherein the radio communication system is characterized. The terminal state management server includes means for holding a call request history including a terminal identifier of a communication terminal that has transmitted the call request signal and a call request date and time when the call destination communication terminal is in a state in which a response is impossible. ,
The terminal status management server transmits the call request history to the communication terminal when receiving the terminal status message transmitted from the communication terminal in a state where the response is impossible. The wireless communication system described. A wireless communication terminal capable of connecting to the communication network by performing wireless connection between the wireless base station and the communication network to which the terminal state management server is connected, and the wireless base station,
The wireless communication terminal broadcasts in a region where wireless connection between the wireless communication terminal and the wireless base station is possible (hereinafter referred to as a service area), and activates the wireless communication terminal (hereinafter referred to as startup). Connected to the activation signal detection means for detecting the signal)
Based on a detection signal output when the activation signal detection means detects the activation signal, automatic power-on means for automatically turning on the power of the wireless communication terminal, and the wireless communication terminal and the wireless base station After being connected, while connected to the radio base station, a terminal status message including a unique terminal identifier assigned to the terminal and the state of the terminal is sent to the terminal state management server at regular time intervals. A wireless communication terminal comprising: a terminal status message transmission unit that continues to transmit.   7. The wireless communication terminal according to claim 6, further comprising means for turning off its own wireless information terminal when the connection with the wireless base station is cut off in addition to each of the means. A terminal state management server for managing a connection state of a communication terminal connectable to a communication network including a wireless base station,
Means for holding a terminal state management list in which a unique terminal identifier assigned to each communication terminal connectable to the communication network is associated with a state of the communication terminal;
Every time a terminal status message including the terminal identifier and terminal status of each terminal is received from the communication terminal, the terminal status included in the terminal status message and included in the terminal status message of the terminal status management list If the status of each terminal is different, the status of the terminal in the terminal status management list is rewritten to the status of the terminal in the terminal status message. A terminal state management server. The terminal state management server includes timer management means for setting and resetting a timer associated with a terminal identifier included in the terminal state message each time the terminal state message is received from the communication terminal.
If there is a timer that has timed out among the active timers, the terminal state of the terminal identifier associated with the timed-out timer in the terminal state management list is changed to a state that is not connected to the communication network. The terminal state management server according to claim 8, wherein the terminal state management server is rewritten. In addition to each of the above means, a call control means for controlling a call when performing communication between two or more communication terminals and a response to the call,
When the call control means receives a call request signal from a communication terminal connected to the communication network, the call control means refers to the terminal state management list, and the call destination communication terminal is in a state where it can respond. Transmits the call request signal to the call destination communication terminal, and if the call destination communication terminal is in a state where a response is not possible, notifies the communication terminal which has transmitted the call request signal that the response is impossible. The terminal state management server according to claim 8 or 9, wherein In addition to each of the above means, when the communication terminal of the call destination is in a state in which the response is impossible, means for holding a call request history including a terminal identifier of the communication terminal that has transmitted the call request signal and a call request date and time,
The terminal state management server according to claim 10, wherein the call request history is transmitted to the communication terminal when the terminal state message transmitted from the communication terminal in a state where the response is impossible is received. A communication network to which a wireless base station and a terminal state management server are connected, a wireless communication terminal capable of connecting to the communication network by performing wireless connection with the wireless base station, and the wireless communication terminal An activation signal notifier for notifying a radio signal (hereinafter referred to as an activation signal) for activating the wireless communication terminal within an area (hereinafter referred to as a service area) in which wireless connection with the radio base station is possible; and the activation signal A control method of a wireless communication system comprising an activation signal detector for detecting the activation signal notified from an alarm device,
Automatically turning on the wireless communication terminal based on a detection signal output when the activation signal detector detects the activation signal;
After the wireless communication terminal is connected to the wireless base station, the wireless communication terminal includes a unique terminal identifier assigned to the own terminal and the state of the own terminal while being connected to the wireless base station. Continuing to transmit terminal status messages to the terminal status management server at regular time intervals;
Holding a terminal state management list in which the terminal state management server associates the state of the communication terminal with a unique terminal identifier assigned to each communication terminal connectable to the communication network;
Each time the terminal state management server receives the terminal state message from the wireless communication terminal, the state of the terminal included in the terminal state message and the terminal included in the terminal state message of the terminal state management list Comparing the state of the terminal associated with the same terminal identifier as the identifier, and rewriting the state of the terminal in the terminal state management list to the state of the terminal in the terminal state message if the state of each terminal is different. A control method for a wireless communication system, comprising:   13. The method according to claim 12, further comprising the step of automatically turning off the wireless information terminal when the connection between the wireless information terminal and the wireless base station is disconnected in addition to the steps. A control method for a wireless communication system. In addition to the above steps, every time the terminal state management server receives the terminal state message from the wireless communication terminal, a step of setting or resetting a timer associated with a terminal identifier included in the terminal state message is operated. When,
If there is a timer that has timed out among the active timers, the terminal state of the terminal identifier associated with the timed-out timer in the terminal state management list is changed to a state that is not connected to the communication network. The wireless communication system control method according to claim 13, further comprising a rewriting step. In addition to the above steps, a step of controlling a call and a response to the call when performing communication between two or more communication terminals in the terminal state management server;
When a call request signal from a communication terminal connected to the communication network is received, the terminal state management list is referred to, and if the call destination communication terminal is in a state where it can respond, the call destination communication Transmitting the call request signal to the terminal, and notifying the communication terminal that has transmitted the call request signal that the call is not possible when the call destination communication terminal is in a state where the call cannot be answered. The control method of the radio | wireless communications system of any one of Claim 12 thru | or 14. In addition to the above steps, a call request history including a terminal identifier and a call request date and time of the communication terminal that has transmitted the call request signal to the terminal state management server when the call destination communication terminal is in a state where it cannot respond. Holding step;
The terminal status management server includes a step of transmitting the call request history to the communication terminal when receiving the terminal status message transmitted from the communication terminal in the response impossible state. The control method of the radio | wireless communications system of Claim 15.

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