JP2009038590A - Radio system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio system which can remarkably reduce the processing load on the overall system caused by wasteful annunciation of incoming calls, while surely avoiding unresponsiveness to calls due to discrepancies, in an order they are supposed to do during movement to a call area of a destination. <P>SOLUTION: A PBX radio system 1 is equipped with a PBX 5. The PBX sets a calling area consisting of call zones of a radio base station 3 and registers the position of a radio terminal 2 by the calling area. When a request for an incoming call to the radio terminal is issued, the PBX informs the radio terminal of the incoming call via a radio base station belonging to the call area, wherein the position of the radio terminal is registered. The radio terminal includes a movement infer and detection processing portion 28 for inferring and detecting the movement from the call area, wherein the position of the radio terminal is registered to the call area of a destination, and a movement announcement informing portion 29, which informs the PBX of a movement announcement which announces the movement to the call area of the destination, when the movement to the call area of the destination is inferred and detected. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention includes, for example, a wireless base station that wirelessly accommodates a wireless terminal such as a PHS, and a control device such as a private branch exchange (PBX), a SIP proxy server, or a gatekeeper that accommodates and connects the wireless base station. The device registers the position information of the wireless terminal via the wireless base station, and when an incoming call request to the wireless terminal is generated, the device has a function of notifying the wireless terminal of the arrival via the wireless base station that is performing the position registration. The present invention relates to a wireless system provided.

  Conventionally, in such a wireless system, a wireless base station that wirelessly accommodates a wireless terminal and a control device that accommodates and connects the wireless base station are provided, and the control device corresponds to a call zone corresponding to the current position of the wireless terminal. When the location registration request of the same wireless terminal is detected through the wireless base station, the location information of the same wireless terminal is registered and managed. For example, the wireless terminal moves from the calling zone to the destination calling zone. In this case, the wireless terminal requests location registration from the control device through the wireless base station in the destination call zone.

  However, when the wireless terminal moves from the source call zone to the destination call zone, the control device requests location registration in accordance with the movement to the destination call zone, and sets the destination call zone as the radio terminal. The location information of the terminal will be registered, but if there is an incoming call request to the wireless terminal before the registration is completed with the destination call zone as the location information, the location information of the wireless terminal is completed. An incoming call request occurs during location registration update because it is determined that the call is in the previous call zone of the previous move source and an incoming call to the radio terminal is notified via the radio base station in the call zone of the previous move source. In such a case, there is a possibility that a call non-response due to a difference in thread occurs.

  Therefore, in order to avoid the occurrence of a call non-response due to such a difference in thread, in addition to the call zone where the wireless terminal is located, peripheral call zones adjacent to the call zone are registered in advance, and When an incoming call request occurs, the radio base station in the peripheral call zone of the calling zone other than the radio base station in the calling zone that is registering the location is also notified of the incoming call to the radio terminal. Therefore, even if an incoming call request to the wireless terminal is generated while moving to the destination call zone, it is possible to reliably avoid a call non-response due to a difference in thread (see, for example, Patent Document 1).

Further, in order to avoid occurrence of a call non-response due to such a difference in thread, for example, a zone range of a call zone for notifying an incoming call for each wireless terminal, for example, a zone range such as a full call zone or a partial call zone For example, when an incoming call request to a wireless terminal is generated, for example, when an incoming request to the wireless terminal is generated, the wireless terminal is transmitted to the wireless terminal via a wireless base station in all calling zones, for example. Since the incoming call request to the same wireless terminal is generated while moving to the destination call zone, it is possible to reliably avoid the call non-response due to the difference in thread ( For example, see Patent Document 2).
JP-A-2-299390 (see claims and FIG. 1) JP-A-8-336180 (see abstract and FIG. 1)

  However, according to the wireless system disclosed in Patent Document 1, when a call zone and a peripheral call zone adjacent to the call zone are registered in advance and an incoming call request to the wireless terminal is generated, the wireless terminal moves to the destination. Regardless of whether or not the mobile station is moving to the other call zone, the radio terminal is unconditionally sent to the radio base station in the call zone where the location registration is being performed and to the radio terminal via the radio base station in the peripheral call zone. However, even if the wireless terminal is located in the calling zone where the location is being registered, the incoming call to the wireless terminal is notified via the wireless base station in the peripheral calling zone. As a result, useless incoming calls increase, and as a result, the processing load on the entire wireless system may increase.

  Further, according to the wireless system of Patent Document 2, a tolerance for setting a calling zone range is given to each wireless terminal, an incoming request to the wireless terminal is generated, and a call corresponding to the tolerance of the wireless terminal is generated. When the zone range is all calling zones, regardless of whether or not the wireless terminal is moving to the destination calling zone, incoming calls to the wireless terminal are unconditionally made via wireless base stations in all calling zones. For example, even when the wireless terminal is located in the calling zone where the location is registered, the incoming call to the wireless terminal is notified via the wireless base station in all the calling zones. There is a possibility that useless incoming calls will increase, and as a result, the processing load on the entire radio system will increase.

  Further, in recent wireless systems, a system in which a calling area configured by a calling zone of a plurality of wireless base stations is set in advance and a wireless terminal is registered for each calling area is becoming widespread. In order to avoid a call non-response, for example, when a call area and a surrounding call area adjacent to the call area are set in advance and an incoming call request to the wireless terminal is generated, the wireless terminal moves to the destination call area. Regardless of whether or not the mobile terminal is moving, it is unconditionally notified of the incoming call to the wireless terminal via the wireless base station in the calling area where the wireless terminal is registering the location and the wireless base station in the peripheral calling area. However, since a plurality of radio base stations are accommodated in the paging area, even if the radio terminal is located in the paging area where the location is being registered, the radio in the peripheral paging area To become possible to inform the incoming call to the wireless terminal via Chikyoku, increasing wasteful incoming As a result, there is a possibility that the processing load on the entire wireless system increases.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a wasteful incoming call notification while reliably avoiding a call non-response due to a difference in thread during movement to a destination call area. It is an object of the present invention to provide a wireless system that can greatly reduce the processing burden on the entire system.

  In order to achieve the above object, the wireless system of the present invention sets in advance a calling area configured by a calling zone of at least one or more wireless base stations, registers a wireless terminal in units of the calling area, and A wireless system comprising a control device for notifying an incoming call to a wireless terminal via a wireless base station belonging to a calling area where the wireless terminal is registered when an incoming call request to the wireless terminal is generated, wherein the wireless terminal Is a movement estimation detecting means for estimating and detecting movement from a calling area whose position is registered in the control device to a destination calling area, and the movement estimation detecting means is used to estimate and detect movement to the destination calling area. In this case, the control device includes a movement advance notice means for notifying a movement advance notice for advance notice of movement to the destination call area.

  According to the wireless system of the present invention configured as described above, when a wireless terminal estimates and detects movement to a destination call area, the control device is notified of movement to the destination call area. For example, the control device can determine that the wireless terminal is moving to the destination call area based on the movement advance, so that the wireless terminal is registering the location. If it is located in the calling area, the incoming call to the wireless terminal is notified via the radio base station in the normal calling area, and only when the wireless terminal is moving to the destination calling area. It is possible to perform incoming call notification to avoid call non-response due to differences, and to reduce useless incoming call notifications. As a result, while reliably avoiding call non-response due to differences in thread, Useless incoming calls The processing load of the entire system due to the knowledge can be greatly reduced.

  The radio system according to claim 1 of the present invention sets in advance a paging area configured by a paging zone of at least one radio base station, registers a location of the radio terminal in units of the paging area, and receives an incoming call to the radio terminal. When a request is generated, the wireless terminal includes a control device that notifies an incoming call to the wireless terminal via a wireless base station belonging to the calling area where the wireless terminal is registered, and the wireless terminal When the movement estimation detecting means for estimating and detecting movement from the calling area being registered in the device to the destination calling area and detecting movement to the destination calling area by the movement estimation detecting means, A movement advance notice means for notifying the control device of a movement advance notice for advance notice of movement to the destination call area is provided.

  Therefore, according to the wireless system according to claim 1 of the present application, when the wireless terminal presumes and detects movement to the destination call area, the movement for notifying the control device of movement to the destination call area is notified. Since the advance notice is notified, for example, the control device can determine that the wireless terminal is moving to the destination call area based on the movement advance notice. If the radio terminal is located within the normal call area, the incoming call to the radio terminal is notified via the radio base station in the normal call area, and only when the radio terminal is moving to the destination call area. It is possible to perform incoming call notification for avoiding call non-response, and to reduce useless incoming call notification. Incoming call notification The processing load of the entire system with can be greatly reduced.

  Further, in the radio system according to claim 2 of the present invention, in the configuration according to claim 1 of the present application, the movement estimation detection means is configured such that the radio signal strength from the radio base station belonging to the calling area during location registration continues for a predetermined time. If it is less than or equal to a predetermined threshold, the movement to the destination call area is estimated and detected.

  Therefore, according to the radio system according to claim 2 of the present application, in addition to the effect of claim 1 of the present application, the radio signal strength from the radio base station belonging to the call area being registered for location continues for a predetermined threshold. In the following cases, since movement to the destination call area is estimated and detected, the call area during location registration can be obtained by paying attention to the radio signal strength from the radio base station belonging to the call area during location registration. It is possible to easily recognize the movement of the wireless terminal to the destination call area before the wireless signal does not reach.

  In addition, in the wireless system according to claim 3 of the present application, in the configuration according to claim 1 of the present application, the movement estimation detection means has the wireless signal strength from the wireless base station belonging to the call area being registered in the same location registered. If the radio signal strength from a radio base station belonging to another call area other than the other call area is smaller than the radio signal strength from the radio base station belonging to the other call area, The movement to the calling area to which the radio base station having the signal strength belongs is estimated and detected as the movement to the calling area of the moving destination.

  Therefore, according to the radio system according to claim 3 of the present application, in addition to the effect of claim 1 of the present application, the radio signal strength from the radio base station belonging to the call area under location registration is the call area under location registration. If the radio signal strength from a radio base station belonging to another call area other than is lower than the radio signal strength from the radio base station belonging to the other call area, the radio signal strength of the maximum radio signal strength Since movement to the call area to which the radio base station belongs is estimated and detected as movement to the call area of the movement destination, the radio signal strength from the radio base station belonging to the call area being registered for location and other call areas By focusing on the comparison result of the radio signal strength from the radio base station to which it belongs, before the radio signal of the paging area being registered for location does not reach, the mobile terminal moves to the paging area of the destination. It can be easily recognized.

  Further, in the radio system according to claim 4 of the present invention, in the configuration according to claim 1 of the present application, the movement estimation detection means is configured such that the radio signal strength from the radio base station belonging to the calling area during the location registration is equal to or less than a predetermined threshold value. In addition, the radio signal strength from the radio base station belonging to the calling area being registered for location is continuously lower than the radio signal strength from a radio base station belonging to another calling area other than the calling area being registered for the predetermined time. In this case, of the radio signal strengths from the radio base stations belonging to the other call areas, movement to the call area to which the radio base station having the maximum radio signal strength belongs is estimated and detected as movement to the destination call area. I did it.

  Therefore, according to the radio system of claim 4 of the present application, in addition to the effect of claim 1 of the present application, the radio signal strength from the radio base station belonging to the call area being registered for location is equal to or less than a predetermined threshold, and the location When the radio signal strength from the radio base station belonging to the calling area being registered is continuously smaller than the radio signal strength from the radio base station belonging to another calling area other than the calling area being registered at the same position for a predetermined time, Among the radio signal strengths from radio base stations belonging to other call areas, movement to the call area to which the radio base station with the maximum radio signal strength belongs is estimated and detected as movement to the call area of the destination. Therefore, the radio signal strength from the radio base station belonging to the call area under location registration, the radio signal strength from the radio base station belonging to the call area under location registration, and other call areas By focusing on the comparison result of the radio signal strengths from the radio base stations belonging to the mobile station, it is possible to accurately move the radio terminal to the destination call area before the radio signal in the call area being registered does not reach. Easy to recognize.

  The radio system according to claim 5 of the present invention is the configuration according to claim 1, 2, 3 or 4 of the present invention, wherein the control device, for each call area, is an area of a surrounding call area adjacent to the call area. A peripheral call area storage means for storing information in advance, and after receiving the movement advance notice from the movement advance notice means on the wireless terminal side, via a wireless base station belonging to the destination call area of the wireless terminal If an incoming call request to the wireless terminal occurs before receiving the location registration request, the wireless terminal is storing in the peripheral call area storage means in addition to the radio base station belonging to the call area being registered for location On the basis of the area information, an incoming call to the radio terminal is notified via a radio base station belonging to a peripheral call area adjacent to the call area whose location is being registered.

  Therefore, according to the wireless system described in claim 5 of the present application, in addition to the effects described in claim 1, 2, 3, or 4 of the present application, after receiving the movement advance notice from the movement advance notice means on the wireless terminal side. If an incoming call request to the radio terminal occurs before receiving a location registration request via the radio base station belonging to the call area to which this radio terminal is moved, the radio terminal enters the call area for which location registration is being performed. In addition to the radio base station to which it belongs, based on the area information stored in the peripheral call area storage means, an incoming call to the radio terminal is made via the radio base station belonging to the peripheral call area adjacent to the call area being registered at the same location. Since the notification is made, only when the wireless terminal is moving to the destination call area, in addition to the wireless base station belonging to the calling area where the wireless terminal is registering, Adjacent to the area In this case, it is possible to reduce the useless incoming call notification by notifying the incoming call to the wireless terminal via the wireless base station belonging to the peripheral call area. Therefore, it is possible to greatly reduce the processing load on the entire system associated with the incoming call notification.

  Further, in the radio system according to claim 6 of the present invention, in the configuration according to claim 1, 2, 3 or 4, the control device is provided for each of the call areas of neighboring radio base stations adjacent to the call area. A wireless base station belonging to a call area to which the wireless terminal is moved, after receiving the movement advance notice from the movement advance notice means on the wireless terminal side; If an incoming call request to the wireless terminal occurs before receiving the location registration request via, in addition to the wireless base station belonging to the calling area where the wireless terminal is registering the location, the neighboring base station storage means Based on the stored base station information, an incoming call to the wireless terminal is notified via a neighboring wireless base station adjacent to the calling area whose location is being registered.

  Therefore, according to the radio system according to claim 6 of the present application, in addition to the effect according to claim 1, 2, 3 or 4 of the present application, after receiving the movement advance notice from the movement advance notice means on the wireless terminal side. If an incoming call request to the radio terminal occurs before receiving a location registration request via the radio base station belonging to the call area to which this radio terminal is moved, the radio terminal enters the call area for which location registration is being performed. In addition to the radio base station to which it belongs, based on the base station information stored in the peripheral base station storage means, an incoming call to the radio terminal is notified via a peripheral radio base station adjacent to the calling area being registered at the same location. As a result, only when the wireless terminal is moving to the destination call area, in addition to the wireless base station belonging to the calling area where the wireless terminal is registered, Adjacent surrounding radio base stations Therefore, it is possible to notify the incoming call to the same wireless terminal, that is, it is possible to suppress unnecessary incoming call notifications in units of radio base stations, not in units of calling areas. It is possible to significantly reduce the processing burden on the entire system accompanying unnecessary call notifications.

  Further, in the radio system according to claim 7 of the present invention, in the configuration according to claim 5 or 6, the control device transmits the call via a radio base station belonging to a call area other than the call area where the radio terminal is registered for location. When the wireless terminal responds to an incoming call from the terminal, communication between the transmitting terminal and the wireless terminal is established.

  Therefore, according to the radio system according to claim 7 of the present application, in addition to the effect of claim 5 or 6 of the present application, the transmitting terminal via the radio base station belonging to a call area other than the call area where the radio terminal is registered When the same wireless terminal responds to an incoming call, communication between the calling terminal and the wireless terminal is established, so that an incoming request to the wireless terminal is generated while moving to the destination call area. Even if this is done, it is possible to reliably avoid a call non-response due to a difference in thread.

  Further, in the radio system according to claim 8 of the present invention, in the configuration according to claim 1, 2, 3, 4, 5, 6 or 7, the control device accommodates a radio base station that radio-accommodates the radio terminal. In addition to connection, the private branch exchange is configured to perform call control of the wireless terminal via the wireless base station.

  Therefore, according to the radio system according to claim 8 of the present application, in addition to the effect of claim 1, 2, 3, 4, 5, 6 or 7, the control device is a radio that accommodates the radio terminal by radio. Since the base station is accommodated and connected and the private branch exchange is configured to call-control the wireless terminal via the wireless base station, the present invention can also be applied to a PBX wireless system equipped with a private branch exchange.

  Further, in the radio system according to claim 9 of the present application, in the configuration according to claim 1, 2, 3, 4, 5, 6 or 7, the control device is connected to the radio base station directly or via a base station gateway. A gatekeeper device connected to the IP network is used.

  Therefore, according to the radio system according to claim 9 of the present application, in addition to the effect of claim 1, 2, 3, 4, 5, 6 or 7, the control device directly or Since it is configured with a gatekeeper device that is connected to the IP network via the station gateway, the H.264 having the gatekeeper device is provided. It can also be applied to a H.323 wireless system.

  Further, in the radio system according to claim 10 of the present invention, in the configuration according to claim 1, 2, 3, 4, 5, 6 or 7, the control device is connected to the radio base station directly or via a base station gateway. A SIP proxy server connected to the IP network is used.

  Therefore, according to the radio system according to claim 10 of the present application, in addition to the effect of claim 1, 2, 3, 4, 5, 6 or 7, the control device can directly or Since the SIP proxy server is connected to the IP network via the station gateway, the present invention can also be applied to a SIP wireless system including the SIP proxy server.

  Embodiments relating to the wireless system of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration inside the PBX wireless system showing the first embodiment.

  A PBX wireless system 1 shown in FIG. 1 accommodates and connects a wireless terminal 2, a plurality of wireless base stations 3 that wirelessly accommodate the wireless terminal 2, a transmitting terminal 4, and the wireless base station 3 and the transmitting terminal 4. A private branch exchange (PBX) 5 is provided. The PBX 5 includes a communication path switch 11 that forms a communication path between the wireless base stations 3 and between the wireless base station 3 and the transmitting terminal 4, and various types of station data, station programs, and the like. A storage unit 12 that manages information and a central control unit 13 that controls the entire PBX 5 are provided.

  The radio base station 3 constitutes a paging zone and controls communication with the radio terminal 2 in the paging zone.

  Further, the central control unit 13 on the PBX 5 side presets a calling area configured by a calling zone of a plurality of wireless terminals 2, for example, a calling area A in the calling zone of the wireless base station 3 of “A1” and “A2”. , “B1” and “B2” call zone B of the radio base station 3, and “C1” and “C2” radio base stations constitute the call area C.

  Further, the central control unit 13 manages the location registration of the wireless terminal 2 in units of calling areas, and when an incoming call request to the wireless terminal 2 is generated, the wireless base station 3 belonging to the calling area where the wireless terminal 2 is being registered. An incoming call to the wireless terminal 2 is notified via the route.

  In addition, the storage unit 12 on the PBX 5 side includes a call area base station management table 12A for managing base station information related to the radio base station 3 in the call area, and a call area for each call area. A peripheral base station management table 12B for managing the base station information of the neighboring radio base station 3 adjacent to the terminal, and a terminal management table 12C for managing the radio terminal 2.

  FIG. 2 is an explanatory diagram briefly showing the table contents of the neighboring base station management table 12B.

  The neighboring base station management table 12B shown in FIG. 2 manages, for each calling area 121B, base station information 122B related to neighboring wireless base stations 3 adjacent to the calling area. The radio base station 3 adjacent to A is the radio base station 3 of “B1” in the call area B, and in the case of the call area B, the radio base station 3 adjacent to the call area B is “A2” of the call area A. In the case of the wireless base station 3 and the wireless base station 3 of “C1” in the calling area C, the calling area C, the wireless base station 3 adjacent to the calling area C is the wireless base station 3 of “B2” in the calling area B. Each base station information is managed.

  FIG. 3 is an explanatory diagram briefly showing the contents of the terminal management table 12C.

  The terminal management table 12C illustrated in FIG. 3 includes, for each wireless terminal 2, a terminal number 121C for identifying the wireless terminal 2, a call area 122C for which the wireless terminal 2 is currently registered, and the wireless terminal 2 that is currently performing position registration. For example, in the case of the wireless terminal 2 whose terminal number 121C is “1000”, the call area 122C that is currently registered is displayed in the movement state 123C that indicates whether or not it is moving from the call area to the destination call area. The calling area A and the moving state 123C are “moving”, and in the case of the wireless terminal 2 with the terminal number 121C “2000”, the calling area 122C currently registered is called the calling area B and the moving state 123C is “none”. Each is managed.

  FIG. 4 is a block diagram showing a schematic configuration inside the wireless terminal 2.

  The radio terminal 2 shown in FIG. 4 is used for a call with a partner, a radio communication unit 21 for radio communication with the radio base station 3, a reception level monitoring unit 22 for measuring a radio signal reception level of the radio base station 3, and A communication unit 23 such as a transmission / reception unit, an operation unit 24 for inputting various information such as a dial number, a display unit 25 for displaying various information, and a control unit 26 for controlling the entire wireless terminal 2. is doing.

  The control unit 26 estimates and detects the position registration request unit 27 for requesting the PBX 5 to register the position of the wireless terminal 2 and the movement of the wireless terminal 2 from the calling area being registered to the destination calling area. When the movement estimation detection processing unit 28 and the movement estimation detection processing unit 28 estimate and detect the movement of the wireless terminal 2 to the destination call area, the movement to the destination call area by the wireless terminal 2 is performed. Is provided with a movement notice notifying unit 29 for notifying the PBX 5 of the movement notice.

  For example, when the wireless terminal 2 is turned on or when the wireless terminal 2 enters another calling area, the location registration request unit 27 passes through the wireless base station 3 in the calling area where the wireless terminal 2 is currently located. This is a request for location registration to the PBX 5.

  The movement estimation detection processing unit 28 uses the reception level monitoring unit 22 to wirelessly detect the movement of the wireless terminal 2 from the calling area where the position is being registered to the calling area where the movement is being performed. A reception level that is a radio signal strength with the base station 3 is measured, and based on a measurement result of the reception level, a first movement estimation detection process to be described later is performed to call a destination call area from a location registration area. The movement is estimated and detected.

  When the movement estimation detection unit 28 estimates and detects movement from the call area being registered to the call area being moved to, the movement notice unit 29 via the radio base station 3 belonging to the call area being registered, A notice of movement is notified to the PBX 5.

  When the central control unit 13 on the PBX 5 side receives the advance notice from the wireless terminal 2 via the wireless base station 3, the central control unit 13 should set “moving” to the moving state 123C corresponding to the terminal number 121C of the wireless terminal 2. The table contents of the terminal management table 12C are updated.

  In addition, when “moving” is set in the movement state 123C in the terminal management table 12C, the central control unit 13 starts the movement operation of the movement advance notice cancellation timer, and when the movement advance notice release timer expires, the movement state The table contents of the terminal management table 12C are updated so as to set 123C to “none”.

  In addition, when an incoming call request to the wireless terminal 2 is generated, the central control unit 13 sends a request to the wireless base station 3 belonging to the calling area 122C being registered for the location corresponding to the terminal number 121C of the wireless terminal 2 in the terminal management table 12C. In contrast, an incoming call to the wireless terminal 2 is notified.

  The central control unit 13 receives a movement advance notice from the wireless terminal 2 via the wireless base station 3 and then receives a location registration request via the wireless base station 3 belonging to the call area to which the wireless terminal 2 is moved. In order to avoid a call non-response due to a difference in thread when an incoming call request to the radio terminal 2 occurs, in addition to the radio base station 3 belonging to the call area where the radio terminal 2 is registered, Based on the base station information 122B stored in the peripheral base station management table 12B, an incoming call to the radio terminal 2 is notified via the peripheral radio base station 3 adjacent to the calling area whose location is being registered.

  The wireless system described in the claims is the PBX wireless system 1, the wireless base station is the wireless base station 3, the wireless terminal is the wireless terminal 2, the control device is the PBX 5, the movement estimation detection means is the movement estimation detection processing unit 28, and the movement notice is notified. The means corresponds to the movement advance notice unit 29, and the neighboring base station storage means corresponds to the neighboring base station management table 12B.

  Next, the operation of the PBX wireless system 1 showing the first embodiment will be described. FIG. 5 is a flowchart showing a processing operation related to the first movement estimation detection process on the wireless terminal 2 side according to the first embodiment.

  The first movement estimation detection process shown in FIG. 5 estimates and detects movement of the wireless terminal 2 from the calling area where the current position is registered to the destination calling area through the movement estimation detection processing unit 28 on the wireless terminal 2 side. It is a process to do.

  In FIG. 5, the movement estimation detection processing unit 28 in the control unit 26 on the wireless terminal 2 side measures the reception level of the radio signal from the radio base station 3 belonging to the calling area being registered through the reception level monitoring unit 22. Then, it is determined whether or not the reception level is below the reference level (step S11). The reference level corresponds to a predetermined threshold value that indicates a significant decrease in the reception level.

  When the reception level is equal to or lower than the reference level, the movement estimation detection processing unit 28 determines that the reception level has significantly decreased, and an erroneous determination prevention timer is used to prevent erroneous determination due to a temporary decrease in reception level. Timekeeping operation is started (step S12). Note that the timer time of the misjudgment prevention timer is set to 3 to 5 seconds, for example.

  The movement estimation detection processing unit 28 determines again whether or not the reception level is equal to or lower than the reference level when the timing determination operation of the erroneous determination prevention timer is started (step S13).

  When the reception level is equal to or lower than the reference level, the movement estimation detection processing unit 28 determines whether or not the erroneous determination prevention timer that has started the time measuring operation in step S12 has expired (step S14).

  When the misjudgment prevention timer expires, the movement estimation detection processing unit 28 determines that the reception level is below the reference level continuously during the misjudgment prevention timer, that is, in the calling area where the same location is being registered. It is determined that the reception level of the radio signal of the radio base station to which the radio base station belongs is surely lowered, the movement to the calling area of the movement destination by the radio terminal 2 is estimated and detected by the radio terminal 2 through the movement advance notice unit 29 By notifying the PBX 5 via the radio base station 3 belonging to the call area being registered (step S15), this processing operation is terminated.

  If the reception level is not below the reference level in step S11, the movement estimation detection processing unit 28 determines that the wireless terminal 2 is located in the calling area where the position is being registered, and performs this processing operation. finish.

  In addition, the movement estimation detection processing unit 28 determines that the reception level is temporarily lowered if the reception level is not lower than the reference level in step S13, and starts the time counting operation in step S12. Is cleared (step S16), and this processing operation ends.

  Further, the movement estimation detection processing unit 28 proceeds to step S13 in order to continuously monitor whether or not the reception level is equal to or lower than the reference level unless the erroneous determination prevention timer has timed out in step S14.

  According to the first movement estimation detection process shown in FIG. 5, the reception level of the radio signal from the radio base station 3 belonging to the calling area being registered for position is measured, and the reception level continues during the misjudgment prevention timer time. Is equal to or lower than the reference level, the radio base station belonging to the call area that is currently registered to detect the movement to the call area of the movement destination by the wireless terminal 2 and notify the movement to the call area of the movement destination 3, the PBX 5 is notified of the movement notice via 3, so the PBX 5 side can recognize the possibility of movement by the wireless terminal 2 to the destination call area.

  Next, the incoming call notification process of the PBX wireless system 1 related to the occurrence of an incoming call request to the wireless terminal 2 that has transmitted the movement advance notice will be described. 6 and 7 are operation sequence diagrams showing processing operations of the entire PBX wireless system 1 related to incoming call notification processing. For convenience of explanation, the wireless terminal 2 with the terminal number “1000” moves from the wireless base station 3 of “A2” belonging to the calling area A of the movement source to the wireless base station 3 of “B1” belonging to the calling area B of the movement destination. It is assumed that an incoming call request from the transmitting terminal 4 to the wireless terminal 2 occurs during the detection of the movement of.

  The incoming call notification process shown in FIG. 6 and FIG. 7 is a process of notifying an incoming call to the wireless terminal 2 when an incoming call request to the wireless terminal 2 that has transmitted the movement advance notice is generated.

  The wireless terminal 2 shown in FIG. 6 moves through the movement advance notice unit 29 when the movement estimation detection processing unit 28 detects movement from the calling area A during location registration to the destination call area B (step S21). In order to give notice of the movement to the previous calling area B, the notice of movement is notified to the radio base station 3 of “A2” of the calling area A being registered (step S22).

  When the wireless base station 3 of “A2” receives the movement advance notice from the wireless terminal 2, it notifies the PBX 5 of the movement advance notice (step S23).

  When the central control unit 13 on the PBX 5 side receives the advance notice of movement, the central control unit 13 sets the contents of the terminal management table 12C to set “in movement” to the movement state 123C corresponding to the terminal number 121C “1000” of the wireless terminal 2. Update (step S24).

  When the central control unit 13 sets the movement state 123C of the wireless terminal 2 to “moving”, the central control unit 13 starts the time counting operation of the movement advance notice cancellation timer (step S25). When the movement advance notice cancellation timer expires, the contents of the terminal management table 12C are updated so as to set the movement state 123C of the wireless terminal 2 from “moving” to “none”.

  When the central control unit 13 detects a transmission request from the transmission terminal 4 to the wireless terminal 2 in response to a transmission operation to the wireless terminal 2 on the transmission terminal 4 side (step S26), the central control unit 13 (step S27). It is determined that an incoming call request has occurred.

  The central control unit 13 searches the terminal management table 12C for the calling area 122C and the movement state 123C corresponding to the terminal number 121A “1000” of the wireless terminal 2 (step S28).

  When the movement state 123C corresponding to the terminal number “1000” of the wireless terminal 2 is “moving” (step S29), the central control unit 13 sets the peripheral area adjacent to the calling area where the position of the wireless terminal 2 is being registered. The base station information of the radio base station 3 is searched from the neighboring base station management table 12B (step S30). In the present embodiment, the calling area being registered for the location corresponding to the wireless terminal 2 of “1000” is the calling area A. Therefore, the surrounding wireless base station 3 corresponding to the calling area A is “B1”. Wireless base station 3.

  The central control unit 13 notifies the incoming call request (SETUP) to the wireless base station 3 of “A2” belonging to the calling area where the location of the wireless terminal 2 is being registered (step S31), and sends a response of the wireless terminal 2 The clocking operation of the non-radio area determination timer to be monitored is started (step S32).

  Then, when receiving the incoming request (SETUP) from the PBX 5, the wireless base station 3 of “A2” starts an incoming call to notify the incoming to the wireless terminal 2 (step S33). The wireless base station 3 side of “A2” stops the incoming call in response to the time-out of the out-of-radio area determination timer on the PBX 5 side.

  Similarly, the central control unit 13 issues an incoming call request (SETUP) to the wireless base station 3 of “B1” adjacent to the search result of step S30, that is, the calling area where the location of the wireless terminal 2 is being registered. Notification is made (step S34), and the time counting operation of the out-of-radio area determination timer that monitors the response of the wireless terminal 2 is started (step S35).

  When the wireless base station 3 of “B1” receives the incoming request (SETUP) from the PBX 5, the wireless base station 3 starts an incoming call to notify the incoming to the wireless terminal 2 (step S36). The wireless base station 3 side of “B1” stops the incoming call in response to the time-out of the out-of-radio area determination timer on the PBX 5 side.

  In addition, when the wireless base station 3 of “A2” starts an incoming call to the wireless terminal 2 in step S33, it notifies the PBX 5 of an incoming call acceptance (CALLPROC) (step S37), and the wireless base station of “B1” When the station 3 starts an incoming call to the wireless terminal 2 in step S36, the station 3 notifies the PBX 5 of an incoming call acceptance (CALLPROC) (step S38), and proceeds to FIG.

  As a result, when an incoming call request to the “1000” wireless terminal 2 that has transmitted the movement advance notice is generated, the PBX 5 has the wireless base station 3 of “A2” belonging to the calling area A in which the wireless terminal 2 is registered, and Thus, the incoming call is started to notify the incoming call to the wireless terminal 2 via the wireless base station 3 of “B1” adjacent to the calling area A.

  In FIG. 7, the wireless terminal 2 responds to the incoming call from the wireless base station 3 of “B1” belonging to the destination call area B among the incoming calls from the wireless base station 3 of “A2” and “B1”. In this case, the same incoming call response is notified to the same radio base station 3 of “B1” (step S41).

  When the wireless base station 3 of “B1” receives the incoming call response of the wireless terminal 2, the wireless base station 3 notifies the wireless terminal 2 of an incoming call request (SETUP) (step S42).

  Upon receiving the incoming call request (SETUP) from the wireless base station 3 for “B1”, the wireless terminal 2 notifies the incoming call reception (CALLPROC) to the wireless base station 3 for “B1” (step S43), The ringing is output (step S44), and the calling (ALERT) is notified to the radio base station 3 of “B1” (step S45).

  When the wireless base station 3 of “B1” receives the calling (ALERT), the wireless base station 3 notifies the PBX 5 of the calling (ALERT) (step S46).

  When receiving the calling (ALERT) on the wireless terminal 2 side via the wireless base station 3 of “B1”, the PBX 5 outputs a ringback tone (RBT) to the transmitting terminal 4 that has transmitted the transmission request in step S27 ( Step S47). The user on the transmission terminal 4 side can listen to the ringback tone and recognize that the other party's wireless terminal 2 is being called.

  Further, when the PBX 5 receives the calling (ALERT) on the wireless terminal 2 side via the wireless base station 3 of “B1”, the PBX 5 stops the incoming call to the wireless terminal 2 via the wireless base station 3 of “A2” Accordingly, the release completion (RELCOMP) is notified to the radio base station 3 of “A2” (step S48), and the incoming call to the radio terminal 2 via the radio base station 3 of “A2” is stopped. As a result, the PBX 5 notifies the wireless terminal 2 of an incoming call from the transmitting terminal 4 only via the wireless base station 3 of “B1”.

  When the wireless terminal 2 detects a response operation while outputting a ringing tone (step S49), the wireless terminal 2 notifies the wireless base station 3 of “B1” of a connection request (CONN) (step S50). When the wireless base station 3 of “B1” detects the connection request (CONN), it notifies the PBX 5 of the connection request (CONN) (step S51).

  When receiving the connection request (CONN) on the wireless terminal 2 side via the wireless base station 3 of “B1”, the PBX 5 notifies the transmission terminal 4 of a response signal (step S52). As a result, the PBX 5 establishes a call between the transmitting terminal 4 and the wireless terminal 2 via the wireless base station 3 of “B1” (step S53).

  The PBX 5 starts the time measurement of the movement advance notice cancellation timer in step S25 shown in FIG. 6, and when the movement advance notice release timer expires (step S54), the wireless terminal 2 having the same terminal number “1000”. In order to set the movement state 123C corresponding to “from moving” to “none”, the table contents of the terminal management table 12C are updated (step S55), and this processing operation is terminated.

  According to the incoming call notification process shown in FIG. 6 and FIG. 7, during the first movement estimation detection process, the wireless terminal 2 issues a location registration request to the destination call area during the movement estimation detection to the destination call area. Only when an incoming call request to the wireless terminal 2 occurs before reception, the wireless base station 3 belonging to the calling area where the position of the wireless terminal 2 is being registered, and neighboring wireless base stations adjacent to the calling area 3, the incoming call to the wireless terminal 2 is notified, so that the processing burden of the entire system associated with the useless incoming call notification can be avoided while reliably avoiding the call non-response due to the movement of the wireless terminal 2 between the call areas. Can be greatly reduced.

  According to the first embodiment, when the wireless terminal 2 estimates and detects movement to the destination call area, the PBX 5 is notified of a movement advance notice for advance notice of movement to the destination call area. Therefore, on the PBX 5 side, it can be determined that the wireless terminal 2 is moving to the destination call area based on the movement advance notice, so that the wireless terminal 2 is located within the call registration area. Is notified of an incoming call to the radio terminal 2 via the radio base station 3 in the normal call area, and only when the radio terminal 2 is moving to the destination call area, is the call It is possible to perform incoming call notification for avoiding a response and reduce unnecessary call notification, and as a result, useless call notification while reliably avoiding a call non-response due to a difference in thread. System-wide The physical burden can be greatly reduced.

  In addition, according to the first embodiment, when the reception level from the radio base station 3 belonging to the call area being registered for position is continuously below the reference level for a predetermined time, the movement to the call area of the movement destination is estimated. Since the detection is performed, by paying attention to the reception level from the radio base station 3 belonging to the call area under position registration, before the radio signal of the call area under position registration does not reach, the call area to the destination is moved. Can be easily recognized.

  Further, according to the first embodiment, after receiving the advance notice of movement from the wireless terminal 2, before receiving a location registration request via the wireless base station 3 belonging to the call area to which the wireless terminal 2 is moved. In addition, when an incoming request to the radio terminal 2 is generated, the base station information stored in the neighboring base station management table 12B is added to the base station information stored in the neighboring base station management table 12B in addition to the radio base station 3 belonging to the calling area where the radio terminal 2 is registered. Based on this, since the incoming call to the wireless terminal 2 is notified via the neighboring wireless base station 3 adjacent to the calling area where the same location is being registered, the wireless terminal 2 is currently moving to the destination calling area. Only in this case, in addition to the radio base station 3 belonging to the call area whose location is being registered, the radio terminal 2 receives an incoming call to the radio terminal 2 via a neighboring radio base station 3 adjacent to the call area whose location is being registered. In other words, in the calling area unit As a result, it is possible to minimize unnecessary notification of incoming calls on a per radio base station basis. It can be greatly reduced.

  Further, according to the first embodiment, the wireless terminal 2 responds to an incoming call from the calling terminal 4 via the wireless base station 3 belonging to a calling area other than the calling area where the wireless terminal 2 is registering the location. In this case, since the communication between the calling terminal 4 and the wireless terminal 2 is established, even if an incoming call request to the wireless terminal 2 is generated while moving to the destination call area, the call is not answered due to a difference in thread. Can be reliably avoided.

  In the first embodiment, the PBX wireless system 1 using the PBX 5 has been described as an example. However, the same applies to the SIP wireless system using the SIP proxy server configured by the IP network instead of the PBX 5. Therefore, the embodiment will be described as a second embodiment.

(Embodiment 2)
FIG. 8 is a block diagram showing a schematic configuration inside the SIP radio system showing the second embodiment. The same components as those of the PBX wireless system 1 shown in the first embodiment are denoted by the same reference numerals, and the description of the overlapping configuration and operation is omitted.

  The SIP wireless system 1A shown in FIG. 8 includes a wireless terminal 2, a plurality of wireless base stations 3A that wirelessly accommodate the wireless terminal 2, and a communication interface with the IP network 6 while accommodating and connecting these wireless base stations 3A. The base station gateway 7 having the function and the wireless terminal 2 are accommodated wirelessly, the IP wireless base station 3B having the communication interface function with the IP network 6 and the transmission terminal having the communication interface function with the IP network 6 4A and a SIP proxy server 8 that manages the base station gateway 7, the IP radio base station 3B, and the calling terminal 4A with IP addresses and has a communication interface function with the IP network 6. Are the IP addresses of the base station gateway 7, the IP wireless base station 3B and the transmitting terminal 4A. And a server side control unit 15 for controlling the entire SIP proxy server 8 related to the SIP protocol of the base station gateway 7, the IP radio base station 3B and the originating terminal 4A. ing.

  The radio base station 3A and the IP radio base station 3B constitute a call zone and control communication with the radio terminal 2 in the call zone. The radio base station 3A is not provided with a communication interface for connecting to the IP network 6, and is therefore connected to the IP network 6 through the base station gateway 7.

  The server-side control unit 15 of the SIP proxy server 8 sets in advance a calling area constituted by a calling zone of a plurality of wireless base stations 3A and IP wireless base stations 3B, for example, wireless base stations “A1” and “A2” Call area A in the call zone of 3A, call area B in the call zone of the radio base station 3A of "B1" and "B2", call area C in the call zone of the IP radio base station 3B of "C1" and "C2" It constitutes.

  Further, the server-side control unit 15 manages the location registration of the radio terminal 2 in units of call areas, and when an incoming call request to the radio terminal 2 is generated, the radio base station belonging to the call area where the radio terminal 2 is being registered. An incoming call to the wireless terminal 2 is notified via 3A (IP wireless base station 3B).

  In addition, the server-side storage unit 14 includes, for each calling area, an in-call area base station management table 14A for managing base station information related to the radio base station 3A (IP radio base station 3B) in the calling area, and a calling area. Each has a peripheral base station management table 14B for managing base station information of a peripheral radio base station 3A (IP radio base station 3B) adjacent to the calling area and a terminal management table 14C for managing the radio terminal 2. is doing.

  The neighboring base station management table 14B manages, for each calling area, base station information related to the neighboring wireless base station 3A (IP wireless base station 3B) adjacent to the calling area. The radio base station adjacent to the area A is the radio base station 3A of “B1” in the call area B, and in the case of the call area B, the radio base station adjacent to the call area B is the radio base station of “A2” in the call area A. In the case of the base station 3A and the IP radio base station 3B of “C1” in the call area C and the call area C, the radio base station adjacent to the call area C is the radio base station 3A of “B2” in the call area B. Each base station information is managed.

  The terminal management table 14C includes, for each wireless terminal 2, a terminal number for identifying the wireless terminal 2, a calling area where the wireless terminal 2 is currently registered, and a destination from which the wireless terminal 2 is registering a location. The movement state indicating whether or not the user is moving to the calling area is managed.

  Further, the location registration request unit 27 inside the control unit 26 of the wireless terminal 2 is configured so that, for example, when the wireless terminal 2 is turned on or when the wireless terminal 2 enters another calling area, the wireless terminal 2 The location registration is requested to the SIP proxy server 8 via the radio base station 3A or the IP radio base station 3B in the calling area.

  The movement estimation detection processing unit 28 uses the reception level monitoring unit 22 to wirelessly detect the movement of the wireless terminal 2 from the calling area where the position is being registered to the calling area where the movement is being performed. The reception level of the radio signal from the base station 3A (IP radio base station 3B) is measured, and based on the measurement result of this reception level, the call of the movement destination is called from the call area being registered through the first movement estimation detection process. The movement to the area is estimated and detected.

  When the movement estimation detection processing unit 28 estimates and detects movement from the call area being registered to the destination call area, the movement advance notice unit 29 detects that the radio base station 3A (IP The advance notice of movement is notified to the SIP proxy server 8 via the wireless base station 3B).

  When the server-side control unit 15 on the SIP proxy server 8 side receives the advance notice from the wireless terminal 2 via the wireless base station 3A (IP wireless base station 3B), the movement state corresponding to the terminal number of the wireless terminal 2 The contents of the terminal management table 14C are updated so that “moving” is set in the terminal management table 14C.

  In addition, when “moving” is set as the movement state in the terminal management table 14C, the server-side control unit 15 starts the time measurement operation of the movement advance notice cancellation timer. The table contents of the terminal management table 14C are updated so as to set the movement state of the table 14C to “none”.

  Further, when an incoming request to the wireless terminal 2 is generated, the server-side control unit 15 causes the wireless base station 3A (IP to belong to the call registration area that corresponds to the terminal number of the wireless terminal 2 in the terminal management table 14C. An incoming call to the radio terminal 2 is notified to the radio base station 3B).

  In addition, the server-side control unit 15 receives the advance notice from the wireless terminal 2 via the wireless base station 3A (IP wireless base station 3B), and then receives the wireless base station 3A belonging to the call area to which the wireless terminal 2 is moved. If an incoming call request to the wireless terminal 2 occurs before receiving the location registration request via the (IP wireless base station 3B), the wireless terminal 2 is positioned in order to avoid a call nonresponse due to a difference in thread. In addition to the wireless base station 3 belonging to the calling area being registered, based on the base station information stored in the neighboring base station management table 14B, the neighboring wireless base station 3A (IP wireless) adjacent to the calling area being registered at the same location An incoming call to the wireless terminal 2 is notified via the base station 3B).

  The wireless system described in the claims is the SIP wireless system 1A, the wireless base station is the wireless base station 3A or the IP wireless base station 3B, the wireless terminal is the wireless terminal 2, the control device is the SIP proxy server 8, and the movement estimation detecting means is the movement The estimated detection processing unit 28, the movement advance notice means correspond to the movement advance notice part 29, and the neighboring base station storage means corresponds to the neighboring base station management table 14B.

  Next, the operation of the SIP wireless system 1A showing the second embodiment will be described.

  First, the incoming call notification process related to the occurrence of an incoming call request to the wireless terminal 2 that has transmitted the movement advance notice in the first movement estimation detection process will be described. 9 and 10 are operation sequence diagrams showing processing operations of the entire SIP wireless system 1A related to the incoming call notification processing. For convenience of explanation, the wireless terminal 2 with the terminal number “1000” moves from the wireless base station 3A of “A2” belonging to the calling area A of the movement source to the wireless base station 3A of “B1” belonging to the calling area B of the movement destination. It is assumed that an incoming call request from the transmitting terminal 4A to the wireless terminal 2 is generated during the movement of. Communication between the radio base station 3A and the SIP proxy server 8 is executed via the base station gateway 7.

  The incoming call notification process shown in FIG. 9 and FIG. 10 is a process of notifying an incoming call to the wireless terminal 2 when an incoming call request to the wireless terminal 2 that has transmitted the movement advance notice is generated.

  When the wireless terminal 2 shown in FIG. 9 presumes and detects the movement from the calling area A being registered to the calling area B as the movement destination through the movement estimation detection processing unit 28 (step S61), the wireless terminal 2 moves through the movement advance notice unit 29. In order to give notice of the movement to the previous calling area B, the notice of movement is notified to the radio base station 3A of “A2” of the calling area A that is being registered (step S62).

  Upon receiving the movement advance notice from the wireless terminal 2, the wireless base station 3A of “A2” notifies the SIP proxy server 8 of the movement advance notice (step S63).

  When the server side control unit 15 of the SIP proxy server 8 receives the movement advance notice, the table of the terminal management table 14 </ b> C is set to set “moving” to the moving state corresponding to the terminal number “1000” of the wireless terminal 2. The contents are updated (step S64).

  When the moving state of the wireless terminal 2 is set to “moving”, the server-side control unit 15 starts the time counting operation of the movement notice cancellation timer (step S65). When the movement advance notice cancellation timer expires, the contents of the terminal management table 14C are updated so as to set the movement state of the wireless terminal 2 from “moving” to “none”.

  Further, the server-side control unit 15 detects a transmission request (INVITE) from the transmission terminal 4A to the wireless terminal 2 in response to a transmission operation to the wireless terminal 2 on the transmission terminal 4A side (Step S66) (Step S67). ), It is determined that an incoming call request to the wireless terminal 2 has occurred, and an outgoing call request acceptance (100 Trying) is notified to the outgoing terminal 4A (step S68).

  Further, when the server-side control unit 15 detects a call request (INVITE) from the calling terminal 4A to the wireless terminal 2 in step S67, the server side control unit 15 manages the calling area and the movement state corresponding to the terminal number “1000” of the wireless terminal. A search is made from the table 14C (step S69).

  If the movement state corresponding to the terminal number “1000” of the wireless terminal 2 is “moving” (step S70), the server-side control unit 15 The base station information of the radio base station 3A (IP radio base station 3B) is searched from the neighboring base station management table 14B (step S71). In the present embodiment, the call area under location registration corresponding to the wireless terminal 2 of “1000” is the call area A. Therefore, the surrounding radio base station 3A (IP radio base station) corresponding to the call area A The station 3B) is the radio base station 3A of “B1”.

  The server-side control unit 15 notifies the incoming call request (INVITE) to the wireless base station 3A of “A2” belonging to the calling area where the location of the wireless terminal 2 is being registered (step S72), and the response of the wireless terminal 2 The clocking operation of the out-of-radio-range determination timer that monitors the start is started (step S73).

  When receiving the incoming request (INVITE) from the SIP proxy server 8, the wireless base station 3A of “A2” starts an incoming call to notify the incoming to the wireless terminal 2 (step S74). The wireless base station 3A side of “A2” stops the incoming call in response to the time-out of the out-of-radio area determination timer on the SIP proxy server 8 side.

  Similarly, the server-side control unit 15 makes an incoming call request (INVITE) to the search result in step S71, that is, to the peripheral “B1” radio base station 3A adjacent to the calling area where the location of the radio terminal 2 is being registered. (Step S75), and starts the time counting operation of the out-of-radio-range determination timer that monitors the response of the wireless terminal 2 (step S76).

  When receiving the incoming request (INVITE) from the SIP proxy server 8, the wireless base station 3A of “B1” starts an incoming call to notify the incoming to the wireless terminal 2 (step S77). The wireless base station 3A side of “B1” stops the incoming call in response to the time-out of the out-of-radio area determination timer on the SIP proxy server 8 side.

  When the wireless base station 3A of “A2” starts an incoming call to the wireless terminal 2 in step S74, it notifies the SIP proxy server 8 of reception request reception (100Trying) (step S78) and “B1”. When the wireless base station 3A starts an incoming call to the wireless terminal 2 in step S77, the wireless base station 3A notifies the SIP proxy server 8 of acceptance of incoming call request (100Trying) (step S79), and shifts to FIG.

  As a result, when the incoming request to the “1000” wireless terminal 2 that has transmitted the advance notice is generated, the SIP proxy server 8 has the wireless base “A2” belonging to the calling area A where the wireless terminal 2 is registered. The incoming call is started to notify the incoming call to the wireless terminal 2 via the station 3A and the surrounding “B1” wireless base station 3A adjacent to the calling area A.

  In FIG. 10, the wireless terminal 2 responds to the incoming call from the wireless base station 3A of “B1” belonging to the destination call area B among the incoming calls from the wireless base station 3A of “A2” and “B1”. In this case, the same incoming call response is notified to the radio base station 3A of “B1” (step S81).

  When the wireless base station 3A of “B1” receives the incoming call response of the wireless terminal 2, the wireless base station 3A notifies the wireless terminal 2 of an incoming call request (SETUP) (step S82).

  When the wireless terminal 2 receives the incoming request (SETUP) from the wireless base station 3A of “B1”, the wireless terminal 2 notifies the incoming call reception (CALLPROC) to the wireless base station 3A of “B1” (step S83). Is output (step S84), and the calling (ALERT) is notified to the radio base station 3A of “B1” (step S85).

  When the wireless base station 3A of “B1” receives the calling (ALERT), the wireless base station 3A notifies the SIP proxy server 8 of the calling (180Ringing) (step S86).

  When the SIP proxy server 8 receives the calling (180 Ringing) via the wireless base station 3A of “B1”, the SIP proxy server 8 notifies the calling terminal 4A that has issued the call request (INVITE) that the calling is in progress (180 Ringing) ( Step S87). As a result, when receiving the ringing (180 Ringing), the wireless terminal 2 outputs a ringback tone (RBT) (step S88). The user on the transmission terminal 4A side can listen to the ringback tone and recognize that the other party's wireless terminal 2 is ringing.

  In addition, when the SIP proxy server 8 receives the “B1” ringing via the radio base station 3A (180 Ringing), the SIP proxy server 8 stops the incoming call to the radio terminal 2 via the radio base station 3A “A2”. Accordingly, the incoming call cancellation (CANCEL) is notified to the radio base station 3A of “A2” (step S89).

  When the wireless base station A2 receives the incoming call cancellation (CANCEL), the wireless base station A2 stops the incoming call to the wireless terminal 2, notifies the SIP proxy server 8 of a disconnection request (BYE) (step S90), and the SIP proxy server 8 In response to the ACK from (step S91), the communication with the SIP proxy server 8 is terminated. As a result, the SIP proxy server 8 notifies the wireless terminal 2 of an incoming call from the transmitting terminal 4A only through the wireless base station 3A of “B1”.

  When the wireless terminal 2 detects a response operation while outputting a ringing tone (step S92), the wireless terminal 2 notifies the wireless base station 3A of "B1" of a connection request (CONN) (step S93). When the wireless base station 3A of “B1” detects the connection request (CONN), it notifies the SIP proxy server 8 of a response (200 OK) (step S94).

  When the SIP proxy server 8 receives the connection request (CONN) on the wireless terminal 2 side via the wireless base station 3A of “B1”, the SIP proxy server 8 notifies the transmission terminal 4A of a response (200 OK) (step S95). As a result, the SIP proxy server 8 establishes a call between the calling terminal 4A and the wireless terminal 2 via the wireless base station 3A of “B1” (step S96).

  The SIP proxy server 8 sets the terminal number “1000” of the wireless terminal 2 when the movement advance notice cancellation timer expires after the movement advance notice release timer starts counting in step S85 (step S97). In order to set the corresponding movement state from “moving” to “none”, the table contents of the terminal management table 14C are updated (step S98), and this processing operation is terminated.

  According to the incoming call notification process shown in FIG. 9 and FIG. 10, the wireless terminal 2 issues a location registration request to the destination call area during the first movement estimation detection process while the movement estimation to the destination call area is detected. Only when an incoming call request to the wireless terminal 2 occurs before reception, the wireless base station 3A (IP wireless base station 3B) belonging to the calling area where the position of the wireless terminal 2 is being registered and the calling area Since the incoming call to the wireless terminal 2 is notified via the neighboring peripheral wireless base station 3A (IP wireless base station 3B), it is possible to reliably avoid the call non-response due to the movement of the wireless terminal 2 between the calling areas. However, it is possible to greatly reduce the processing load on the entire system accompanying useless incoming call notification.

  According to the second embodiment, when the wireless terminal 2 estimates and detects a movement to the destination call area, the SIP proxy server 8 is notified of the movement to notify the movement to the destination call area. Since the notification is made on the SIP proxy server 8 side, it can be determined that the wireless terminal 2 is moving to the destination call area based on the movement advance notice. When located in the area, the incoming call to the radio terminal 2 is notified via the radio base station 3A (IP radio base station 3B) in the normal call area, and the radio terminal 2 moves to the destination call area. It is possible to execute an incoming call notification for avoiding a call non-response due to a difference in thread only when the mobile phone is moving, and it is possible to reduce unnecessary call notifications. Confirm non-response It can while avoiding, to significantly reduce the overall processing load system due to wasteful incoming call notification thing.

  Further, according to the second embodiment, when the reception level from the radio base station 3A (IP radio base station 3B) belonging to the calling area being registered for location is continuously lower than the reference level for a predetermined time, Since the movement to the calling area is estimated and detected, paying attention to the reception level from the wireless base station 3A (IP wireless base station 3B) belonging to the calling area being registered, the calling area being registered It is possible to easily recognize the movement to the destination call area before the radio signal does not reach.

  Further, according to the second embodiment, after receiving the movement advance notice from the wireless terminal 2, the wireless terminal 2 is routed through the wireless base station 3A (IP wireless base station 3B) belonging to the destination call area of the movement destination. If an incoming call request to the wireless terminal 2 occurs before receiving the location registration request, a wireless base station belonging to the calling area in which the wireless terminal 2 is registered in order to avoid a call non-response due to a difference in thread In addition to 3A (IP radio base station 3B), based on the base station information stored in the neighboring base station management table 14B, the neighboring radio base station 3A (IP radio base station 3B adjacent to the calling area being registered at the same location) ), The incoming call to the wireless terminal 2 is notified, so that only when the wireless terminal 2 is moving to the destination call area, the wireless terminal 2 belongs to the call area whose location is being registered. Wireless base station 3A (IP wireless In addition to the base station 3B), an incoming call to the radio terminal 2 is notified via a neighboring radio base station 3A (IP radio base station 3B) adjacent to the call area whose location is being registered, that is, not in units of call areas As a result, it is possible to minimize unnecessary call notifications for each radio base station. As a result, while avoiding unanswered calls due to differences in threading, the processing burden on the entire system associated with unnecessary call notifications is greatly increased. Can be reduced.

  Further, according to the second embodiment, an incoming call from the calling terminal 4A via the wireless base station 3A (IP wireless base station 3B) belonging to the calling area other than the calling area where the wireless terminal 2 is registering the location is received. When the wireless terminal 2 responds, communication between the calling terminal 4A and the wireless terminal 2 is established, so even if an incoming call request to the wireless terminal 2 occurs during movement to the destination call area Therefore, it is possible to reliably avoid a call non-response due to a difference in thread.

  In the second embodiment, the SIP wireless system 1A using the SIP proxy server 8 has been described as an example. However, the H.264 using the gatekeeper instead of the SIP proxy server 8 is described. Since the same effect can be obtained for the H.323 wireless system, its embodiment will be described as a third embodiment.

(Embodiment 3)
FIG. 11 shows a third embodiment of H.264. It is a block diagram which shows schematic structure inside a H.323 wireless system. Note that the same components as those of the SIP wireless system 1A shown in the second embodiment are denoted by the same reference numerals, and the description of the overlapping configuration and operation is omitted.

  H. shown in FIG. In addition to the wireless terminal 2, the wireless base station 3A, the base station gateway 7, the IP wireless base station 3B, the transmitting terminal 4A, and the IP network 6, the 323 wireless system 1B includes the base station gateway 7, the IP wireless base station 3B, and the transmitting The terminal 4A is managed by an IP address, and also includes a gatekeeper 9 having a communication interface function with the IP network 6. The gatekeeper 9 includes various kinds of IP addresses such as the base station gateway 7, the IP radio base station 3B, and the originating terminal 4A. The gatekeeper side storage unit 16 that manages information, the H.P. of the base station gateway 7, the IP radio base station 3B, and the transmitting terminal 4A. And a gatekeeper side controller 17 for controlling the entire gatekeeper 9 related to the H.323 protocol.

  The radio base station 3A and the IP radio base station 3B constitute a call zone and control communication with the radio terminal 2 in the call zone. The radio base station 3A is not provided with a communication interface for connecting to the IP network 6, and is therefore connected to the IP network 6 through the base station gateway 7.

  The gatekeeper side control unit 17 of the gatekeeper 8 sets in advance a calling area constituted by a calling zone of a plurality of wireless base stations 3A and IP wireless base stations 3B, for example, the wireless base station 3A of “A1” and “A2”. Call area A in the call zone, call area B in the call zone of the radio base station 3A of “B1” and “B2”, and call area C in the call zone of the IP radio base station of “C1” and “C2” It is.

  Further, the gatekeeper side control unit 17 manages the location registration of the wireless terminal 2 in units of calling areas, and when an incoming call request to the wireless terminal 2 is generated, the wireless base station 2 belongs to the calling area where the wireless terminal 2 is being registered. An incoming call to the wireless terminal 2 is notified via 3A (IP wireless base station 3B).

  The gatekeeper-side storage unit 16 includes, for each calling area, a calling area base station management table 16A that manages base station information related to the wireless base station 3A (IP wireless base station 3B) in the calling area, and a calling area. Each has a peripheral base station management table 16B for managing base station information of a peripheral radio base station 3A (IP radio base station 3B) adjacent to the calling area, and a terminal management table 16C for managing the radio terminal 2. is doing.

  The neighboring base station management table 16B manages, for each calling area, base station information related to the neighboring wireless base station 3A (IP wireless base station 3B) adjacent to the calling area. The radio base station adjacent to the area A is the radio base station 3A of “B1” in the call area B, and in the case of the call area B, the radio base station adjacent to the call area B is the radio base station of “A2” in the call area A. In the case of the base station 3A and the IP radio base station 3B of “C1” in the call area C and the call area C, the radio base station adjacent to the call area C is the radio base station 3A of “B2” in the call area B. Each base station information is managed.

  The terminal management table 16C includes, for each wireless terminal 2, a terminal number for identifying the wireless terminal 2, a calling area where the wireless terminal 2 is currently registered, and a destination where the wireless terminal 2 is registering a location. The movement state indicating whether or not the user is moving to the calling area is managed.

  Further, the location registration request unit 27 inside the control unit 26 of the wireless terminal 2 is configured so that, for example, when the wireless terminal 2 is turned on or when the wireless terminal 2 enters another calling area, the wireless terminal 2 The position registration is requested to the gatekeeper 9 via the radio base station 3A or the IP radio base station 3B in the calling area.

  The movement estimation detection processing unit 28 uses the reception level monitoring unit 22 to wirelessly detect the movement of the wireless terminal 2 from the calling area where the position is being registered to the calling area where the movement is being performed. The reception level of the radio signal from the base station 3A (IP radio base station 3B) is measured, and based on the measurement result of this reception level, the call of the movement destination is called from the call area being registered through the first movement estimation detection process. The movement to the area is estimated and detected.

  When the movement estimation detection processing unit 28 estimates and detects movement from the call area being registered to the destination call area, the movement advance notice unit 29 detects that the radio base station 3A (IP A notice of movement is notified to the gatekeeper 9 via the radio base station 3B).

  When the gatekeeper-side control unit 17 on the gatekeeper 9 side receives a movement advance notice from the wireless terminal 2 via the wireless base station 3A (IP wireless base station 3B), the gatekeeper-side control unit 17 sets the movement state corresponding to the terminal number of the wireless terminal 2 to “ The table contents of the terminal management table 16C are updated so as to set “moving”.

  Further, in the gatekeeper side control unit 17, when the movement state in the terminal management table 16C is set to “moving”, the timing of the movement advance notice cancellation timer is started, and when the movement advance notice release timer is up, The table contents of the terminal management table 16C are updated so as to set “none” as the movement state of the management table 16C.

  Further, when an incoming request to the wireless terminal 2 is generated, the gatekeeper side control unit 17C causes the wireless base station 3A (IP to belong to the calling area being registered corresponding to the terminal number of the wireless terminal 2 in the terminal management table 16C. An incoming call to the radio terminal 2 is notified to the radio base station 3B).

  Further, the gatekeeper side control unit 17 receives the advance notice from the wireless terminal 2 via the wireless base station 3A (IP wireless base station 3B), and then receives the wireless base station 3A belonging to the call area to which the wireless terminal 2 is moved. If an incoming call request to the wireless terminal 2 occurs before receiving the location registration request via the (IP wireless base station 3B), the wireless terminal 2 is positioned in order to avoid a call nonresponse due to a difference in thread. In addition to the radio base station 3A (IP radio base station 3B) belonging to the call area being registered, based on the base station information stored in the peripheral base station management table 16B, the peripheral area adjacent to the call area being registered at the same location An incoming call to the wireless terminal 2 is notified via the wireless base station 3A (IP wireless base station 3B).

  The wireless system described in the claims is H.264. 323 wireless system 1B, wireless base station is wireless base station 3A or IP wireless base station 3B, wireless terminal is wireless terminal 2, control device is gatekeeper 9, movement estimation detection means is movement estimation detection processing section 28, movement advance notice means is The movement advance notice unit 29 and the neighboring base station storage means correspond to the neighboring base station management table 16B.

  Next, H. 3 which shows the third embodiment. The operation of the H.323 wireless system 1B will be described.

  First, the incoming call notification process related to the occurrence of an incoming call request to the wireless terminal 2 that has transmitted the movement advance notice in the first movement estimation detection process will be described. 12 and 13 show H.264 related to incoming call notification processing. It is an operation | movement sequence diagram which shows the processing operation of the whole H.323 wireless system 1B. For convenience of explanation, the wireless terminal 2 with the terminal number “1000” moves from the wireless base station 3A of “A2” belonging to the calling area A of the movement source to the wireless base station 3A of “B1” belonging to the calling area B of the movement destination. It is assumed that an incoming call request from the transmitting terminal 4A to the wireless terminal 2 occurs during the movement estimation detection. Communication between the radio base station 3 </ b> A and the gatekeeper 9 is performed via the base station gateway 7.

  The incoming call notification process shown in FIG. 12 and FIG. 13 is a process for notifying an incoming call to the wireless terminal 2 when an incoming call request to the wireless terminal 2 that has issued the movement advance notice is generated.

  The wireless terminal 2 shown in FIG. 12 moves through the movement advance notice unit 29 when the movement estimation detection processing unit 28 estimates and detects movement from the calling area A during location registration to the destination calling area B (step S101). In order to give notice of the movement to the previous calling area B, a notice of movement is notified to the radio base station 3A of “A2” of the calling area A during location registration (step S102).

  When receiving the movement advance notice from the wireless terminal 2, the wireless base station 3 </ b> A of “A2” notifies the gatekeeper 9 of the movement advance notice (step S <b> 103).

  When the gatekeeper side control unit 17 of the gatekeeper 9 receives the movement notice, the gate management table 16C sets the table contents of the terminal management table 16C so as to set “moving” to the movement state corresponding to the terminal number “1000” of the wireless terminal 2. Update (step S104).

  When the movement state of the wireless terminal 2 is set to “moving”, the gatekeeper side control unit 17 starts the time counting operation of the movement advance notice cancellation timer (step S105). When the movement notice cancellation timer expires, the contents of the terminal management table 16C are updated so as to set the movement state of the wireless terminal 2 from “moving” to “none”.

  In response to a call operation to the radio terminal 2 on the transmission terminal 4A side (step S106), the gatekeeper side control unit 17 changes the call source terminal 4A to the radio base station 3A in the calling area where the counterpart radio terminal 2 is located. When an address request (ARQ) requesting the corresponding IP address is detected (step S107), the calling area and the movement state corresponding to the terminal number “1000” of the wireless terminal 2 are searched from the terminal management table 16C (step S108). The gatekeeper side control unit 17 searches the in-call area base station management table 16A for the IP address of the radio base station 3A corresponding to the call area based on the search result of the call area.

  When the gatekeeper side control unit 17 searches the calling area and the movement state corresponding to the terminal number “1000” of the wireless terminal 2, the movement state corresponding to the terminal number “1000” of the wireless terminal 2 is “moving”. In the case (step S109), the base station information of the neighboring radio base station 3A (IP radio base station 3B) adjacent to the calling area where the location of the radio terminal 2 is being registered is searched from the neighboring base station management table 16B (step S110). ). In the present embodiment, the call area under location registration corresponding to the wireless terminal 2 of “1000” is the call area A. Therefore, the surrounding radio base station 3A or IP radio base corresponding to the call area A The station 3B is the radio base station 3A of “B1”.

  The gatekeeper side control unit 17 assigned the IP addresses of the radio base station 3A (IP radio base station 3B) and the surrounding radio base station 3A (IP radio base station 3B) in the calling area during the location registration of the radio terminal 2 Address confirmation (ACF) is notified to the calling terminal 4A side (step S111).

  Upon receiving the address confirmation (ACF), the calling terminal 4A receives the wireless base of “A2” in the calling area “A” during location registration of the wireless terminal 2 based on the IP address included in the address confirmation (ACF). The station 3A is notified of an incoming call request (SETUP) (step S112), and the time counting operation of the out-of-radio area determination timer that monitors the response of the wireless terminal 2 is started (step S113).

  Then, the wireless base station 3A of “A2” starts an incoming call to notify the incoming call to the wireless terminal 2 in response to the incoming call request (SETUP) from the calling terminal 4A (step S114). The wireless base station 3A side of “A2” stops the incoming call in response to the time-out of the out-of-radio area determination timer on the transmitting terminal 4A side.

  Further, when receiving the address confirmation (ACF), the calling terminal 4A, based on the IP address included in the address confirmation (ACF), the neighboring terminal adjacent to the calling area “A” during the location registration of the wireless terminal 2 An incoming call request (SETUP) is notified to the wireless base station 3A of “B1” (step S115), and the time counting operation of the out-of-radio frequency determination timer that monitors the response of the wireless terminal 2 is started (step S116).

  Then, the wireless base station 3A of “B1” starts an incoming call to notify the incoming call to the wireless terminal 2 in response to the incoming call request (SETUP) from the calling terminal 2 (step S117). The wireless base station 3A side of “B1” stops the incoming call in response to the time-out of the out-of-radio area determination timer on the transmitting terminal 4A side.

  When the wireless base station 3A of “A2” starts an incoming call to the wireless terminal 2 in step S114, it notifies the calling terminal 4A of an incoming call reception (CALLPROC) that has received an incoming call request (SETUP) from the calling terminal 4A. (Step S118).

  Further, when the wireless base station 3A of “B1” starts an incoming call to the wireless terminal 2 in step S117, the incoming call reception terminal (CALLPROC) that receives the incoming call request (SETUP) from the outgoing terminal 4A is issued. (Step S119).

  Further, the radio base station 3A of “A2” notifies the gatekeeper 9 of an address request (ARQ) (step S120). When the gatekeeper 9 receives the address request (ARQ), the originating terminal 4A registers and manages the incoming call to the wireless terminal 2 via the wireless base station 3A of “A2”, and the address confirmation (ACF) is “A2”. Is notified to the wireless base station 3A (step S121).

  Further, the wireless base station 3A of “B1” notifies the gatekeeper 9 of an address request (ARQ) (step S122). Upon receipt of the address request (ARQ), the gatekeeper 9 registers and manages that the calling terminal 4A is receiving a call to the wireless terminal 2 via the wireless base station 3A of “B1”, and sets the address confirmation (ACF) to “B1”. Is notified to the wireless base station 3A (step S123), the processing shifts to FIG.

  As a result, when an incoming call request to the “1000” wireless terminal 2 that has transmitted the movement advance notice is generated, the wireless base station 3A of “A2” belonging to the calling area A in which the wireless terminal 2 is registered, and the same call This means that the incoming call is started to notify the incoming call to the wireless terminal 2 via the wireless base station 3A of “B1” adjacent to the area A.

  In FIG. 13, the wireless terminal 2 responds to the incoming call from the wireless base station 3A of “B1” belonging to the destination call area B among the incoming calls from the wireless base station 3A of “A2” and “B1”. In this case, the same incoming call response is notified to the radio base station 3A of “B1” (step S131).

  When receiving the incoming call response of the wireless terminal 2, the wireless base station 3A of “B1” notifies the wireless terminal 2 of an incoming call request (SETUP) (step S132).

  Upon receiving the incoming call request (SETUP) from the wireless base station 3A of “B1”, the wireless terminal 2 notifies the incoming call reception (CALLPROC) to the wireless base station 3A of “B1” (step S133), and makes a ringing tone. The ringing is output (step S134), and the calling (ALERT) is notified to the radio base station 3A of “B1” (step S135).

  When the wireless base station 3A of “B1” receives the calling (ALERT), it notifies the calling terminal 4A of the calling (ALERT) (step S136). As a result, when receiving the calling (ALERT), the calling terminal 4A outputs a ringback tone (RBT) (step S137). The user on the transmission terminal 4A side can recognize the ringing of the partner wireless terminal 2 by listening to the ringback tone (RBT).

  If the calling terminal 4A receives “B2” ringing (ALERT) via the wireless base station 3A in step S136, the calling terminal 4A receives an incoming call to the wireless terminal 2 via the wireless base station 3A of “A2”. In step S138, the disconnection request (DRQ) of the radio base station 3A of “A2” is notified to the gatekeeper 9 (step S138). In response to the disconnection request (DRQ), the gatekeeper 9 notifies the calling terminal 4A of a disconnection confirmation (DCF) to stop the incoming call to the wireless terminal 2 via the wireless base station 3A of the same “A2” (step S4). S139).

  When receiving the disconnection confirmation (DCF), the transmitting terminal 4A notifies the radio base station 3A of “A2” of the release completion (RELCOMP) (step S140).

  When receiving the release completion (RELCOMP), the radio base station 3A of “A2” stops the incoming call to the radio terminal 2 and notifies the gatekeeper 9 of a disconnection request (DRQ) (step S141). When the gatekeeper 9 receives the disconnection request (DRQ), the gatekeeper 9 stops the incoming call to the wireless terminal 2 via the wireless base station 3A of the same “A2”, and performs the disconnection confirmation (DCF) of the wireless base station of “A2”. 3A is notified (step S142).

  As a result, the transmitting terminal 4A notifies the wireless terminal 2 of an incoming call from the transmitting terminal 4A only through the wireless base station 3A of “B1”.

  When the wireless terminal 2 detects a response operation while outputting a ringing tone (step S143), the wireless terminal 2 notifies the wireless base station 3A of “B1” of a connection request (CONN) (step S144). When the wireless base station 3A of “B1” detects the connection request (CONN), the wireless base station 3A notifies the gatekeeper 9 of the connection request (CONN) (step S145).

  When the gatekeeper 9 receives the connection request (CONN) on the wireless terminal 2 side via the wireless base station 3A of “B1”, the gatekeeper 9 notifies the transmission terminal 4A of a response signal (step S146). As a result, a call between the transmitting terminal 4A and the wireless terminal 2 is established via the wireless base station 3A of “B1” (step S147).

  When the movement advance notice release timer expires after the start of the movement advance notice release timer in step S105 shown in FIG. 12 (step S148), the gatekeeper 9 sets the terminal number “1000” of the wireless terminal 2. In order to set the movement state corresponding to "from moving" to "none", the table contents of the terminal management table 16C are updated (step S149), and this processing operation is terminated.

  According to the incoming call notification process shown in FIGS. 12 and 13, during the first movement estimation detection process, the wireless terminal 2 issues a position registration request to the destination call area during the movement estimation detection to the destination call area. Only when an incoming call request to the wireless terminal 2 occurs before reception, the wireless base station 3A (IP wireless base station 3B) belonging to the calling area where the position of the wireless terminal 2 is being registered and the calling area Since the incoming call to the wireless terminal 2 is notified via the neighboring peripheral wireless base station 3A (IP wireless base station 3B), it is possible to reliably avoid the call non-response due to the movement of the wireless terminal 2 between the calling areas. However, it is possible to greatly reduce the processing load on the entire system accompanying useless incoming call notification.

  According to the third embodiment, when the wireless terminal 2 estimates and detects movement to the destination call area, the gatekeeper 9 is notified of a movement advance notice for advance notice of movement to the destination call area. As a result, on the gatekeeper 9 side, it can be determined that the wireless terminal 2 is moving to the destination call area on the basis of the movement advance notice, so that the wireless terminal 2 is located within the call registration area. In the case of doing so, an incoming call to the radio terminal 2 is notified via the radio base station 3A (IP radio base station 3B) in the normal call area, and the radio terminal 2 is moving to the call area of the destination. In this case, it is possible to perform incoming call notification for avoiding a call non-response due to a difference in thread and reduce unnecessary call notifications. While avoiding The processing load of the entire system due to wasted incoming call notification can be greatly reduced.

  Further, according to the third embodiment, when the reception level from the radio base station 3A (IP radio base station 3B) belonging to the calling area being registered for location is continuously lower than the reference level for a predetermined time, Since the movement to the calling area is estimated and detected, paying attention to the reception level from the wireless base station 3A (IP wireless base station 3B) belonging to the calling area being registered, the calling area being registered It is possible to easily recognize the movement to the destination call area before the radio signal does not reach.

  Further, according to the third embodiment, after receiving the movement advance notice from the wireless terminal 2, the wireless terminal 2 passes through the wireless base station 3A (IP wireless base station 3B) belonging to the destination call area. If an incoming call request to the wireless terminal 2 occurs before receiving the location registration request, a wireless base station belonging to the calling area in which the wireless terminal 2 is registered in order to avoid a call non-response due to a difference in thread In addition to 3A (IP radio base station 3B), based on the base station information stored in the neighboring base station management table 14B, the neighboring radio base station 3A (IP radio base station 3B adjacent to the calling area being registered at the same location) ), The incoming call to the wireless terminal 2 is notified, so that only when the wireless terminal 2 is moving to the destination call area, the wireless terminal 2 belongs to the call area whose location is being registered. Wireless base station 3A (IP wireless In addition to the base station 3B), an incoming call to the radio terminal 2 is notified via a neighboring radio base station 3A (IP radio base station 3B) adjacent to the call area whose location is being registered, that is, not in units of call areas As a result, it is possible to minimize unnecessary call notifications for each radio base station. As a result, while avoiding unanswered calls due to differences in threading, the processing burden on the entire system associated with unnecessary call notifications is greatly increased. Can be reduced.

  Further, according to the third embodiment, an incoming call from the calling terminal 4A via the wireless base station 3A (IP wireless base station 3B) belonging to a calling area other than the calling area where the wireless terminal 2 is registering a location is handled. When the wireless terminal 2 responds, communication between the calling terminal 4A and the wireless terminal 2 is established, so even if an incoming call request to the wireless terminal 2 occurs during movement to the destination call area Therefore, it is possible to reliably avoid a call non-response due to a difference in thread.

  Note that in the first to third embodiments, the radio signal from the radio base station 3A (IP radio base station 3B) belonging to the calling area being registered for location in the first movement estimation detection process shown in FIG. When the reception level is equal to or lower than the reference level for the duration of the misjudgment prevention timer, the movement to the destination call area by the wireless terminal 2 is estimated and detected, and the destination call area is detected. To notify the PBX 5 (SIP proxy server 8 or gatekeeper 9) via the radio base station 3A (IP radio base station 3B) belonging to the calling area for which location registration is being performed. Instead of the first movement estimation detection process, a second movement estimation detection process (see FIG. 14) and a third movement estimation detection process (see FIG. 15) as described below may be performed.

  FIG. 14 is a flowchart showing the processing operation of the movement detection estimation processing unit 28 in the wireless terminal 2 related to the second movement estimation detection process. For convenience of explanation, a wireless terminal 2 on the PBX wireless system 1 is assumed.

  The second movement estimation detection process shown in FIG. 14 estimates and detects movement of the wireless terminal 2 from the calling area where the current position is registered to the calling area of the movement destination through the movement estimation detection processing unit 28 on the wireless terminal 2 side. It is a process to do.

  In FIG. 14, the movement estimation detection processing unit 28 in the control unit 26 on the wireless terminal 2 side receives the reception level of the wireless signal from the wireless base station 3 belonging to the calling area being registered through the reception level monitoring unit 22, and The reception level of the radio signal from the radio base station 3 belonging to a call area other than the area is measured, and the reception level of the radio signal from the radio base station 3 belonging to the call area being registered at the same position is other than the call area. It is determined whether or not the reception level is lower than the reception level of the radio signal from the radio base station 3 belonging to another call area (step S151).

  The movement estimation detection processing unit 28, when the reception level of the radio signal from the radio base station 3 belonging to the calling area under location registration is smaller than the reception level of the radio signal from the radio base station 3 belonging to another calling area, Time-counting operation of the misjudgment prevention timer to determine that the reception level of the radio signal from the radio base station 3 belonging to the calling area under location registration has been significantly lowered and to prevent misjudgment due to a temporary drop in reception level Is started (step S152). Note that the timer time of the misjudgment prevention timer is set to 3 to 5 seconds, for example.

  When the movement estimation detection processing unit 28 starts the time counting operation of the misjudgment prevention timer, the reception level of the radio signal from the radio base station 3 belonging to the call area being registered at the same position is changed to a call area other than the call area. It is determined whether or not the reception level of the radio signal from the radio base station 3 to which it belongs is lower (step S153).

  The movement estimation detection processing unit 28 receives a radio signal from a radio base station 3 whose reception level of a radio signal from the radio base station 3 belonging to the calling area being registered at the same position belongs to another calling area other than the calling area. If it is smaller than the level, it is determined whether or not the erroneous determination prevention timer that started the time measuring operation in step S152 has timed out (step S154).

  When the misjudgment prevention timer expires, the movement estimation detection processing unit 28 calls for the radio base station 3 having the maximum reception level among the reception levels of radio signals from the radio base stations 3 belonging to other call areas. An area is selected (step S155), the selected call area is estimated and detected as a destination call area by the wireless terminal 2, and the wireless terminal 2 moves to the destination call area through the movement advance notice unit 29. Is notified to the PBX 5 via the radio base station 3 belonging to the call area being registered (step S156), and this processing operation is terminated.

  In addition, the movement estimation detection processing unit 28 receives the radio signal from the radio base station 3 belonging to the calling area being registered at the same location in step S151, and the radio base station 3 belongs to a calling area other than the calling area. If it is not lower than the reception level of the radio signal from the mobile station, it is determined that the radio terminal 2 is located in the calling area where the location is being registered, and this processing operation is terminated.

  In addition, the movement estimation detection processing unit 28 receives the radio signal from the radio base station 3 belonging to the calling area being registered at the same location in step S153, and the radio base station 3 belongs to a calling area other than the calling area. If it is not lower than the reception level of the radio signal from, it is determined that the reception level of the radio signal from the radio base station 3 belonging to the calling area being registered for location is a temporary decrease in the reception level, and in step S152 The misjudgment prevention timer that has started the time counting operation is cleared (step S157), and this processing operation ends.

  Further, the movement estimation detection processing unit 28 determines that the reception level of the radio base station 3 belonging to the call area being registered is other than the call area, unless the erroneous determination prevention timer has timed out in step S154. In order to continuously monitor whether or not the reception level of the radio signal from the radio base station 3 belonging to is lower than that, the process proceeds to step S153.

  According to the second movement estimation detection process shown in FIG. 14, the reception level of the radio signal from the radio base station 3 belonging to the call area being registered for location and the radio base station 3 belonging to another call area other than the call area The reception level of the radio signal from the wireless base station 3 belonging to the paging area that is registered for the same location is measured for other paging areas other than the paging area. If the reception level of the radio signal from the radio base station 3 to which the radio base station 3 belongs is smaller than the reception level of the radio signal from the radio base station 3 belonging to the other paging area, the call of the radio base station 3 related to the maximum reception level In order to estimate and detect the area as a movement to the destination call area by the wireless terminal 2 and to notify the movement to the destination call area, the wireless base station 3 belonging to the call area being registered for location is notified. Since the movement advance notice is notified to the PBX 5, the PBX 5 side compares the reception level of the radio base station 3 belonging to the call area being registered with the reception level of the radio base station 3 belonging to another call area. By paying attention, it is possible to easily recognize the movement of the wireless terminal 2 to the destination calling area before the wireless signal of the calling area being registered does not reach.

  FIG. 15 is a flowchart showing the processing operation of the movement detection estimation processing unit 28 in the wireless terminal 2 related to the third movement estimation detection process. For convenience of explanation, the wireless terminal 2 on the PBX wireless system 1 is assumed.

  In FIG. 15, the movement estimation detection processing unit 28 in the control unit 26 on the wireless terminal 2 side measures the reception level of the radio signal from the radio base station 3 belonging to the calling area being registered through the reception level monitoring unit 22. Then, it is determined whether or not the reception level is below the reference level (step S161).

  Further, when the reception level is equal to or lower than the reference level, the movement estimation detection processing unit 28 measures the reception level of the radio signal from the radio base station 3 belonging to a call area other than the call area being registered, Whether the reception level of the radio signal from the radio base station 3 belonging to the paging area being registered is lower than the reception level of the radio signal from the radio base station 3 belonging to a paging area other than the paging area being registered at the same location Is determined (step S162).

  The movement estimation detection processing unit 28, when the reception level of the radio signal from the radio base station 3 belonging to the calling area under location registration is smaller than the reception level of the radio signal from the radio base station 3 belonging to another calling area, Time-counting operation of the misjudgment prevention timer to determine that the reception level of the radio signal from the radio base station 3 belonging to the calling area under location registration has been significantly lowered and to prevent misjudgment due to a temporary drop in reception level Is started (step S163). Note that the timer time of the misjudgment prevention timer is set to 3 to 5 seconds, for example.

  When the movement estimation detection processing unit 28 starts the time counting operation of the misjudgment prevention timer, the movement estimation detection processing unit 28 measures the reception level of the radio signal from the radio base station 3 belonging to the calling area during the position registration, and the reception level is below the reference level. It is determined whether or not there is (step S164).

  Furthermore, when the reception level is equal to or lower than the reference level, the movement estimation detection processing unit 28 sets the reception level of the radio signal from the radio base station 3 belonging to the calling area being registered in the same location to a calling area other than the calling area. It is determined whether or not the reception level of the radio signal from the radio base station 3 to which it belongs is smaller (step S165).

  The movement estimation detection processing unit 28 receives a radio signal from a radio base station 3 whose reception level of a radio signal from the radio base station 3 belonging to the calling area being registered at the same position belongs to another calling area other than the calling area. If it is smaller than the level, it is determined whether or not the erroneous determination prevention timer that started the time measuring operation in step S163 has expired (step S166).

  When the misjudgment prevention timer expires, the movement estimation detection processing unit 28 calls for the radio base station 3 having the maximum reception level among the reception levels of radio signals from the radio base stations 3 belonging to other call areas. An area is selected (step S167), the selected call area is estimated and detected as movement to the destination call area by the wireless terminal 2, and the destination call area by the wireless terminal 2 is transmitted through the movement advance notice unit 29. By notifying the PBX 5 via the radio base station 3 belonging to the calling area for which location registration is in progress (step S168), the processing operation is terminated.

  Further, the movement estimation detection processing unit 28 determines whether the reception level of the radio signal from the radio base station 3 belonging to the call area being registered in step S161 is not below the reference level, or the call being registered in position in step S162. If the reception level of the radio signal from the radio base station 3 belonging to the area is not smaller than the reception level of the radio signal from the radio base station 3 belonging to another calling area other than the calling area, the wireless terminal 2 registers the position. It is determined that it is located in the middle calling area, and this processing operation is terminated.

  Further, the movement estimation detection processing unit 28 determines whether the reception level of the radio signal from the radio base station 3 belonging to the call area being registered in step S164 is not lower than the reference level or the call being registered in step S165. If the reception level of the radio signal from the radio base station 3 belonging to the area is not smaller than the reception level of the radio signal from the radio base station 3 belonging to another calling area other than the calling area, It is determined that the reception level of the radio signal from the radio base station 3 to which it belongs is a temporary decrease in the reception level, and the misjudgment prevention timer that started the timing operation in step S163 is cleared (step S169). Exit.

  Further, the movement estimation detection processing unit 28 determines whether or not the reception level of the radio base station 3 belonging to the calling area being registered for position is equal to or lower than the reference level unless the erroneous determination prevention timer has timed out in step S166. In step S164, the process proceeds to step S164.

  According to the second movement estimation detection process shown in FIG. 15, the reception level of the radio signal from the radio base station 3 belonging to the call area being registered for position is below the reference level, and the radio base belonging to the call area being registered for the same position. If the state in which the reception level of the radio signal from the station 3 is lower than the reception level of the radio signal from the radio base station 3 belonging to another call area continues for the erroneous determination prevention timer time, the radio base stations belonging to the other call area Among the reception levels of radio signals from the station 3, the call area of the radio base station 3 related to the maximum reception level is estimated and detected as movement to the call area of the movement destination by the radio terminal 2, and the call area of the movement destination is detected. Since the PBX 5 is notified of the movement notice via the radio base station 3 belonging to the call area where the position is being registered, the PBX 5 side is informed of the call error during the position registration. Pay attention to the comparison result of the reception level of the radio base station 3 belonging to a, and further the reception level of the radio base station 3 belonging to the calling area being registered and the reception level of the radio base station 3 belonging to another calling area. Thus, before the wireless signal of the calling area being registered for location does not reach, it is possible to accurately and easily recognize the movement of the wireless terminal 2 to the destination calling area.

  In the first to third embodiments, after receiving the advance notice of the wireless terminal 2, a location registration request is received via the wireless base station 3 belonging to the destination call area of the wireless terminal 2. In order to avoid a call non-response due to a difference in thread when an incoming call request to the wireless terminal 2 is generated, the radio base station 3 belonging to the calling area in the location registration of the wireless terminal 2 Based on the table contents of the neighboring base station management table 14B shown in FIG. 2, the incoming call to the wireless terminal 2 is notified via the neighboring wireless base station 3 adjacent to the calling area whose position is being registered. As shown in FIG. 16, instead of the base station unit, the adjacent call area is managed for each call area, the wireless base station belonging to the destination call area of the wireless terminal 2 after receiving the movement notice of the wireless terminal 2 Location registration via 3 16 is received, in addition to the radio base station 3 belonging to the call area whose location is being registered, the peripheral call area management table 18A shown in FIG. The same effect can be obtained even if the incoming call to the wireless terminal 2 is notified via the wireless base station 3 that belongs to the surrounding calling area adjacent to the calling area that is being registered based on the table contents of Needless to say.

  According to the wireless system of the present invention, when the wireless terminal detects and detects movement to the destination call area, the control device is notified of a movement advance notice for notifying movement to the destination call area. Since, for example, the control device side can determine that the wireless terminal is moving to the destination call area based on the movement advance notice, the wireless terminal is located in the call area being registered for location. Announces an incoming call to the same wireless terminal via a wireless base station in the normal calling area, and avoids a call non-response due to a difference in thread only when the wireless terminal is moving to the destination calling area. Can be used to perform the incoming call notification to reduce the useless call notification, and as a result, the system accompanying the useless call notification while reliably avoiding the call non-response due to the difference in thread. The entire Since it is possible to greatly reduce the processing load, for example PBX wireless system, SIP wireless system or H. This is useful for H.323 wireless systems.

The block diagram which shows schematic structure inside the PBX radio | wireless system which shows 1st Embodiment in connection with the radio | wireless system of this invention Explanatory drawing which shows the table content of the surrounding base station management table in connection with 1st Embodiment briefly Explanatory drawing which shows the table content of the terminal management table in connection with 1st Embodiment briefly 1 is a block diagram showing a schematic configuration inside a wireless terminal according to a first embodiment The flowchart which shows the processing operation in connection with the 1st movement estimation detection process by the side of the radio | wireless terminal in connection with 1st Embodiment. Operation sequence diagram showing processing operation of the entire PBX wireless system related to incoming call notification processing of the first embodiment Operation sequence diagram showing processing operation of the entire PBX wireless system related to incoming call notification processing of the first embodiment The block diagram which shows schematic structure inside the SIP radio | wireless system which shows 2nd Embodiment. The operation | movement sequence diagram which shows the processing operation of the whole SIP radio | wireless system in connection with the incoming call alerting | reporting process of 2nd Embodiment The operation | movement sequence diagram which shows the processing operation of the whole SIP radio | wireless system in connection with the incoming call alerting | reporting process of 2nd Embodiment H. showing a third embodiment. 323 is a block diagram showing a schematic configuration inside the wireless system The H.264 related to the incoming call notification process of the third embodiment. 323 is an operation sequence diagram showing processing operations of the entire H.323 wireless system The H.264 related to the incoming call notification process of the third embodiment. 323 is an operation sequence diagram showing processing operations of the entire H.323 wireless system FIG. 5 is a flowchart showing a processing operation related to a second movement estimation detection process which is an alternative to the first movement estimation detection process of FIG. FIG. 5 is a flowchart showing a processing operation related to a third movement estimation detection process which is an alternative to the first movement estimation detection process of FIG. Explanatory drawing which shows the table content of the surrounding call area management table which is an alternative of the surrounding base station management table of FIG.

Explanation of symbols

1 PBX wireless system (wireless system)
1A SIP wireless system (wireless system)
1B H. 323 wireless system (wireless system)
2 wireless terminal 3 wireless base station 3A wireless base station 3B IP wireless base station (wireless base station)
5 PBX (control device)
8 SIP proxy server (control device)
9 Gatekeeper (control device)
12B peripheral base station management table (peripheral base station storage means)
14B peripheral base station management table (peripheral base station storage means)
16B Peripheral base station management table (peripheral base station storage means)
18A Peripheral area management table (peripheral call area storage means)
28 Movement estimation detection processing unit (movement estimation detection means)
29 Movement advance notice section (movement advance notice means)

Claims (10)

When a call area configured by a call zone of at least one radio base station is set in advance, the location of the radio terminal is registered in units of the call area, and when an incoming call request to the radio terminal occurs, the radio terminal A wireless system including a control device that notifies an incoming call to the wireless terminal via a wireless base station belonging to a calling area during location registration,
The wireless terminal is
Movement estimation detecting means for estimating and detecting movement from a call area whose location is registered in the control device to a call area of a movement destination;
When the movement estimation detection means presumes and detects movement to the destination call area, a movement notice notification means for notifying the control device of a movement advance notice for movement to the destination call area. And a wireless system. The movement estimation detection means includes
2. The movement to the destination call area is estimated and detected when the radio signal strength from a radio base station belonging to the call area being registered for a predetermined time continues for a predetermined time or less. The wireless system described. The movement estimation detection means includes
The radio signal strength from a radio base station belonging to the calling area being registered for location is continuously lower than the radio signal strength from a radio base station belonging to a calling area other than the calling area being registered for the predetermined time. The movement to the call area to which the radio base station having the maximum radio signal strength among the radio signal strengths from the radio base stations belonging to the other call areas is estimated and detected as movement to the call area of the movement destination. The wireless system according to claim 1. The movement estimation detection means includes
The radio signal strength from a radio base station belonging to the call area under location registration is less than a predetermined threshold, and the radio signal strength from a radio base station belonging to the call area under location registration is other than the call area being registered at the same location. If the radio signal strength from a radio base station belonging to another call area is continuously lower than the radio signal strength for a predetermined time, the radio base having the maximum radio signal strength among the radio signal strengths from the radio base stations belonging to the other call area 2. The radio system according to claim 1, wherein movement to a call area to which a station belongs is estimated and detected as movement to the call area of the destination. The controller is
Peripheral call area storage means for storing area information of peripheral call areas adjacent to the call area in advance for each call area;
After receiving the movement advance notice from the movement advance notice means on the wireless terminal side, before receiving a location registration request via a wireless base station belonging to the call area to which the wireless terminal is moved, In addition to the radio base station belonging to the call area whose location is being registered, the radio terminal is added to the call area whose location is being registered based on the area information stored in the peripheral call area storage means. 5. The radio system according to claim 1, 2, 3 or 4, wherein an incoming call to the radio terminal is notified via a radio base station belonging to an adjacent peripheral call area. The controller is
Peripheral base station storage means that prestores base station information of neighboring radio base stations adjacent to the call area for each call area;
After receiving the movement advance notice from the movement advance notice means on the wireless terminal side, before receiving a location registration request via a wireless base station belonging to the call area to which the wireless terminal is moved, In response to the incoming call request of the same location, in addition to the radio base station belonging to the call area whose location is being registered, the call area being registered at the same location based on the base station information stored in the peripheral base station storage means 5. The radio system according to claim 1, 2, 3 or 4, wherein an incoming call to the radio terminal is notified via a neighboring radio base station adjacent to the radio station. The controller is
When the wireless terminal responds to an incoming call from a calling terminal via a wireless base station belonging to a calling area other than the calling area where the wireless terminal is registering a location, communication between the calling terminal and the wireless terminal is established. The wireless system according to claim 5 or 6, wherein The controller is
6. A private branch exchange that accommodates and connects a wireless base station that wirelessly accommodates the wireless terminal and performs call control of the wireless terminal via the wireless base station is provided. , 6 or 7. The controller is
8. The wireless system according to claim 1, comprising a gatekeeper device connected to the wireless base station and an IP network directly or via a base station gateway. The controller is
8. The wireless system according to claim 1, comprising a SIP proxy server connected to the wireless base station directly or via a base station gateway to an IP network.

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