JP2565896B2 - Location registration method for mobile communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a mobile communication system configured in combination with a private branch exchange, for example, in a business office or an office.
In particular, it relates to a position registration method for registering the position of each mobile radio device in a private branch exchange.

(Prior Art) Conventionally, there are the following mobile communication systems using a private branch exchange, for example. FIG. 7 shows the schematic configuration of this system. This system is connected to a private branch exchange 2 via a plurality of office lines 11 to 1n and extension lines 31 to 3m to the private branch exchange 2, respectively. And a plurality of fixed wireless devices 41 to 4m connected to each other and a plurality of mobile wireless devices 61 to 6n connected to the fixed wireless devices 41 to 4m via wireless lines.

In such a configuration, for example, from the subscriber telephone network to the office line
When a call arrives at 11, the private branch exchange 2 first selectively activates the fixed radio 41 in the radio zone 51 in which the mobile radio 61 corresponding to the station line 11 exists, and the extension 31 is connected to the fixed radio 41. An incoming signal is output via the. Then, an incoming signal is transmitted from the fixed wireless device 41 to the mobile wireless device 61 via the control channel of the wireless line, and as a result, the mobile wireless device 61 is notified of the incoming call and, for example, a sound is output from the sounder. This notifies the user of the occurrence of the incoming call.
On the other hand, when the user responds, for example, by picking up the handset, a response signal is returned from the mobile radio 61 to the private branch exchange 2 via the fixed radio 41 and the extension 31. As a result, the private branch exchange 2 causes the extension 31 to return. The mobile wireless device 61 can communicate with the telephone set on the calling side after the connection between the mobile telephone 61 and the station line 11.

On the other hand, when the user takes off-hook the mobile wireless device 61 to make a call, a transmission signal is generated from the mobile wireless device 61 and sent to the private branch exchange 2 via the control channel, the fixed wireless device 41 and the extension 31. To be Then, the private branch exchange 2 connects the extension 31 and the office line 11, and thereafter the mobile radio
The dial signal can be sent from 61. When the user inputs the desired telephone number of the other party on the mobile radio 61, a dial signal corresponding to this telephone number is sent to the private branch exchange 2 via the fixed radio 41, and the private branch exchange 2 moves. The radios are connected to each other or to the telephone of the outside line via the subscriber telephone network, and the telephone call becomes possible thereafter.

By the way, the greatest feature of this type of system is that each mobile radio 61-6n is connected to each fixed radio 41-4m in all radio zones 51-5m.
However, in order to enable connection regardless of which radio zone 51-5m the mobile radios 61-6n are in, it is necessary for at least the private branch exchange 2 to move each mobile radio. It is necessary to keep track of the locations of 61 to 6n. Therefore, conventionally, for example, each mobile wireless device 61 is as follows.
Location registration of ~ 6n. That is, during standby, each fixed wireless device 41 to 4m periodically (for example, every 10 minutes) sends out a position notification signal, and each mobile wireless device 61 to 6n receives which position notification signal among the above position notification signals. Detect what is done. Here, for example, as shown in FIG. 8, the position notification signal includes information (notification code) indicating that it is a notification signal, followed by identification information (ID code) and additional information of the fixed radios 41 to 4m of the transmission source. It is composed of
Therefore, each mobile wireless device 61 to 6n detects that it is a position notification signal by identifying the notification code, and from the ID code of the fixed wireless device 41 to 4m, its position, that is, which fixed wireless device 41. It is possible to recognize whether or not there is a wireless zone 51 to 5 m of 4 m. Then, when the position of its own device is detected, the mobile wireless devices 61 to 6n receive the information indicating this position, that is, the ID code of the fixed wireless device 41 to 4m, from the fixed wireless device 41 to
Tell the private branch exchange 2 via 4m to register. Therefore, the private branch exchange 2 can always keep track of the positions of the mobile radios 61 to 6n. As a result, for example, if an incoming call is made to the mobile radio 41 according to the information shown in FIG. By confirming the position of the wireless device 61 from the registered position information, the fixed wireless device 41 in the wireless zone 51 in which the mobile wireless device 41 exists can be activated to send an incoming signal.

However, such a conventional location registration method has the following problems. That is, since the control channel is often used by various connection controls in the wireless zone of the fixed wireless device with heavy traffic, it is difficult for the fixed wireless device to transmit the position notification signal regularly without fail. Then, the position detection of the mobile wireless device and the position registration in the private branch exchange cannot be performed regularly and reliably, and as a result, the private branch exchange 2 still moves even if the mobile radios 61 to 6n move to another wireless zone. There is a risk of erroneously determining that the system is not operating, and the operating reliability of the system may be reduced. In order to eliminate this, it is also considered that the position notification signal transmission cycle is shortened to perform frequent position detection and position registration. However, in this way, incoming and outgoing calls can be made while the position notification signal is being transmitted. The probability of occurrence of connection control cannot be increased due to this, and as a result, the original connection control operation may be hindered, which is extremely undesirable.

Further, in the conventional method, the mobile radio device checks again for reception of the position notification signal from the fixed radio device which has registered the position for a fixed period after the position registration. Therefore, if, during the re-reception check period, a position notification signal does not arrive from the fixed wireless device that has registered the position for connection control to, for example, another mobile wireless device, instead, the wireless zone is adjacent to the other. If the position notification signal comes from the fixed wireless device, the mobile wireless device determines that the position has moved despite the fact that the position has not actually moved, and performs control to change the registered position. Therefore, the control channel is used for unnecessary location registration control, which causes a problem that the original connection control is hindered.

(Problems to be Solved by the Invention) As described above, the conventional location registration method has a problem that the original connection control is adversely affected because the control channel is unnecessarily occupied for location registration. Focusing on this point, the present invention provides a mobile communication system capable of increasing the position detection chance of a mobile radio device to improve the position registration accuracy and reducing the use of unnecessary control channels to more reliably perform connection control. It is intended to provide a location registration method.

[Configuration of the Invention] (Means for Solving Problems) The present invention relates to a private branch exchange connected to a communication network via a wired line, and a plurality of fixed radios each connected to the private branch exchange via an extension line. In a mobile communication system composed of a mobile device and a plurality of mobile wireless devices selectively connected to these fixed wireless devices via a wireless line, as shown in FIG. For each detection period, it receives a position notification signal that periodically arrives from each fixed wireless device and a connection control signal to other mobile wireless devices that arrives irregularly in addition to this position notification signal. Whenever a signal and a connection control signal are received, position detecting means A for detecting the position of the own device from the identification information of the fixed wireless device of the transmission source, which is inserted in the signal, and every time the above-mentioned predetermined detection period elapses. On, Based on the position of the own device detected by the position detection unit A, a determination unit that determines whether or not the own device has moved from the position currently registered, and this determination unit determines that the own device has moved. Only in this case, the position registration means B transmits the position of the own device detected by the position detection means to the private branch exchange via the fixed wireless device of the transmission source so as to be registered.

(Operation) As a result, according to the present invention, the following various operations are exhibited.

In the mobile wireless device, not only when the position notification signal periodically transmitted from the fixed wireless device is received, but also when the connection control signal addressed to another mobile wireless device that is irregularly transmitted is received. , The position of its own is detected from the identification signal of the fixed wireless device inserted in this received signal, it is determined whether or not the own device has moved based on these detected positions, the determination result Location registration is carried out based on this. Therefore, compared to the conventional method that relies only on the position notification signal, the chances of detecting the position of the own device increase, and even if the position notification signal does not arrive due to the increase in traffic, the position of the own device can be detected. It is possible to reliably detect and register the position.

In particular, the combined use of the position notification signal and the connection control signal has the following advantages. That is, in general, when the traffic increases, the opportunity of transmitting the position notification signal tends to be lost, but conversely, the frequency of transmitting the connection control signal increases. On the other hand, when the traffic becomes low, the opportunity for sending the connection control signal decreases, but the opportunity for sending the position notification signal is certainly held. From such a relationship, the mobile wireless device can detect the position of the mobile device at a stable frequency at all times regardless of the traffic, thereby realizing highly reliable position registration.

Whether or not the own device has moved is determined for each predetermined period based on the position of the own device detected from the position notification signal and the connection control signal received within the period. That is, the presence or absence of movement of the own device is not determined every time one signal is received, but the position detected from the position notification signal and the connection control signal received within a predetermined period is comprehensively determined. The presence or absence of movement is determined. Therefore, it becomes difficult to make an erroneous determination, which makes it possible to enhance the determination accuracy and perform highly reliable position registration.

As described above, the presence / absence of the own device is determined every predetermined period, and the position registration procedure for the exchange is executed only when it is determined by this determination that the own device has moved. For this reason, the location registration procedure is executed only when the location registration is truly required, and thus it is possible to prevent the control channel from being wastefully used and prevent the connection control from being adversely affected. .

(Embodiment) FIG. 2 shows the configuration of a mobile wireless device to which the location registration method in one embodiment of the present invention is applied. This mobile wireless device has a transmitting unit 82 and a receiving unit 84 for transmitting and receiving a signal to and from a fixed wireless device via a transmitting antenna 81 and a receiving antenna 83, and transmitting and receiving channels of these transmitting unit and receiving units 82, 84. Synthesizer section 85 to specify and handset 87
a and a control unit 86 to which a handset 87 accommodating the transmitter 87b is connected. Of these, the control unit 86 has, for example, a microcomputer as a main control circuit, and includes position detection means 86a and position registration control means 86b in addition to connection control means 86a as shown in FIG.
The connection control means 86a performs predetermined connection control with the fixed wireless device at the time of incoming and outgoing calls. Position detection means 86a
When the position notification signal and the connection control signal sent from the fixed wireless device are received, the position of the own device, that is, the own device exists from the ID code of the fixed wireless device of the transmission source inserted in these signals. The wireless zone to be detected is detected.
Further, the position registration control means 86c judges that the own device has moved to another wireless zone when the position detected by the position detection means 86b is different from the current registered position, and sends a position registration request signal to the private branch exchange. Is sent to change the previously registered position information to new position information.

Next, the location registration method of this embodiment will be described based on the above configuration. While in standby mode, each mobile wireless device sets the A flag and B flag to "0" in step 4a as shown in FIG. 4, then starts the timer in step 4b, and then signals in step 4c and step 4d, respectively. Of the arrival of the above-mentioned timer and the timeout of the above timer.

Now, in this state, when a position notification signal or a connection control signal sent to another mobile wireless device is received from the fixed wireless device, the control unit 86 of the mobile wireless device inserts it into the received signal in step 4e. Detect the ID code of the fixed radio that is enabled. That is, the ID code of the fixed wireless device of the transmission source is inserted in the position notification signal and the connection control signal as shown in FIGS. 8 and 5, respectively. Therefore, the control unit 86 of the mobile wireless device can detect the ID code of the fixed wireless device of the transmission source both when the position notification signal is received and when the connection control signal is received. Then, when the ID code of the fixed radio is detected, the control unit
86 moved to step 4f and newly detected here
It is determined whether the ID code matches the ID code currently registered as the position of the own device. If both ID codes match, it is determined that the own machine has not moved and step 4g
Then, the A flag is set to "1", and if they do not match, it is determined that the own device has moved to the wireless zone of another fixed wireless device, and the B flag is set to "1" in step 4h. And
Return to step 4d for time out monitoring.

In this state, for example, when the time (10 to 15 minutes) set to the transmission cycle of the position notification signal elapses and the timer times out, the control unit 86 of the mobile radio shifts from step 4d to step 4i First, the contents of the A flag and the B flag are determined, and the registration position change control is performed according to the determination result. That is, if the A flag is "1" and the B flag is "0", it is determined that the own machine is not moving and the registration position is not changed and the step 4a is directly performed.
Return to A while the A flag is "0" and the B flag is "1"
If so, it is determined that the own device has moved to the wireless zone of another fixed wireless device, and the process proceeds to step 4j. Then, in this step 4j, for example, as shown in FIG. 6, a position registration request signal in which the ID code of the new fixed wireless device, the ID code of the own device, and the additional information are arranged after the registration request code is created, and this position registration request is made. The signal is sent to the fixed radio in step 4k.
Then, the position registration request signal is received by the fixed radio and is then sent to the private branch exchange to be newly registered in place of the ID code registered up to that point in the private branch exchange. That is, the registration position of the mobile wireless device is changed. When the control unit 86 of the mobile unit completes the transmission of the location registration request signal to the private branch exchange, the control unit 86 operates in Step 4l.
The ID code representing the position of the player's own machine, which is stored in the internal memory of 86, is rewritten to the above new ID code, and then the initial state is restored.

As described above, according to this embodiment, the following effects can be obtained.

In the mobile wireless device, when the connection control signal sent from the fixed wireless device to another mobile wireless device is received, the ID of the fixed wireless device of the transmission source inserted in this connection control signal
Since the position of the own device is detected from the code and the registered position of the private branch exchange 2 is changed to a new position when the position of the own device changes as a result of this detection, the frequency of detecting the position of the own device is reduced. Even if the position notification signal is not sent out regularly due to connection control by incoming and outgoing calls, the problem of being unable to detect the position of the own device for a long time is solved, and as a result, new position information is always available in the premises compared to the conventional one. Can be registered with the exchange. As a result, the private branch exchange 2 can grasp the position of the mobile wireless device more accurately than in the conventional case, and thereby the probability of erroneous connection can be greatly reduced.

Since the position detection is performed by the connection control signal from the fixed wireless device to another mobile device, during the re-reception check period after the position registration, the position notification signal does not arrive from the fixed wireless device that has registered the position. Even if a position notification signal arrives from another fixed wireless device, position registration is not performed by this position notification signal, so that useless use of the control channel is prevented and adverse effects on connection control can be reduced. .

Since the position registration request signal is sent to the private branch exchange 2 to change the position registration only when the position is changed as a result of the position detection, compared with the case where the position registration is changed every time the position is detected. As a result, the frequency of use of the control channel can be reduced, and thus the control channel can be effectively used.

The present invention is not limited to the above embodiment.
For example, when the traffic is small and the position cannot be detected continuously for a certain period of time or more, the mobile radio requests the fixed radio to send a position notification signal, or the fixed radio transmits the position notification signal voluntarily. The transmission cycle may be shortened and the position detection frequency may be increased. In addition, the configurations, operation procedures, operation contents, etc. of the position detecting means and the position registering means can be variously modified and implemented without departing from the scope of the present invention.

[Effects of the Invention] As described above in detail, the present invention has the following effects.

The mobile wireless device receives a position notification signal that periodically arrives from each fixed wireless device and a connection control signal to another mobile wireless device that arrives irregularly from each fixed wireless device, and notifies these position notifications. Each time a signal or connection control signal is received, the position of the own device is detected from the identification information of the fixed wireless device of the transmission source, which is inserted in the signal, and whether or not the own device moves based on the detection result. The position is registered by determining.

Therefore, in the mobile wireless device, not only when the position notification signal periodically transmitted from the fixed wireless device is received, but also when the connection control signal addressed to another mobile wireless device that is irregularly transmitted is received. Also, the position of the own device is respectively detected from the identification signals of the fixed radios inserted in these received signals, and it is determined whether or not the own device has moved based on these detected positions. Location registration is performed based on the determination result. Therefore, compared to the conventional method that relies only on the position notification signal, the chances of detecting the position of the own device increase, and even if the position notification signal does not arrive due to the increase in traffic, the position of the own device can be detected. It is possible to reliably detect and register the position.

The position of its own device is detected from the position notification signal and the connection control signal received within a predetermined period, and this is held, and when the predetermined period elapses, each of the held detected positions is used as a basis. First, it is determined whether or not the own device has moved from the position being registered.

Therefore, the determination as to whether or not the own device has moved is made for each predetermined period based on the position of the own device that is detected from the position notification signal and the connection control signal received within that period. That is, the presence or absence of movement of the own device is not determined every time one signal is received, but the position detected from the position notification signal and the connection control signal received within a predetermined period is comprehensively determined. The presence or absence of movement is determined. Therefore, it becomes difficult to make an erroneous determination, which makes it possible to enhance the determination accuracy and perform highly reliable position registration.

Every time a predetermined period of time has passed, it is determined whether or not the own device has moved, and only when it is determined by this determination that the own device has moved, the location registration with respect to the exchange is performed.

Therefore, the location registration procedure is executed only when the location registration is truly required, which can prevent the control channel from being wastefully used and prevent the connection control from being adversely affected. .

[Brief description of drawings]

FIG. 1 is a functional block diagram showing the location registration system of the present invention,
2 to 6 are for explaining the location registration system according to the embodiment of the present invention. FIG. 2 is a circuit block diagram of a mobile wireless device to which the system is applied, and FIG. 3 is the wireless device. 4 is a functional block diagram showing the function of the control unit, FIG. 4 is a flow chart showing the control procedure and control contents of the control unit, FIG. 5 is a schematic diagram showing the configuration of the connection control signal, and FIG. 6 is a position registration request signal. FIG. 7 is a schematic configuration diagram showing an example of a mobile communication system according to the present invention, and FIG. 8 is a schematic diagram showing a configuration of a position notification signal. 11 to 1n: Central office line, 2 ... Private branch exchange, 31 to 3m: Extension line,
41 ~ 4m ...... Fixed radio, 51 ~ 5m ...... Wireless zone of fixed radio, 61 ~ 6n ...... Mobile radio, 81 ... Transmission unit, 82 ... Transmission antenna, 83 ... Reception antenna, 84 ... … Receiver, 85…
Synthesizer section, 86 control section, 86a connection control means, 86b position detection means, 86c position registration control means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomio Ishikawa 1-chome, 3-chome, Asahigaoka, Hino City Toshiba Corporation Hino factory (56) References JP-A-61-245696 (JP, A)

Claims (1)

(57) [Claims] 1. A private branch exchange connected to a communication network via a wired line, a plurality of fixed radios each connected to the private branch exchange via an extension, and a radio line to these fixed radios. In a location registration method of a mobile communication system composed of a plurality of mobile wireless devices selectively connected to each other, the mobile wireless device periodically arrives from each of the fixed wireless devices at a predetermined detection period. Receives a position notification signal and a connection control signal addressed to another mobile wireless device that arrives irregularly, and fixes the transmission source inserted in the signal each time these position notification signal and connection control signal are received. Position detecting means for detecting the position of the own device from the identification information of the wireless device, and every time the predetermined detection period elapses, based on the position of the own device detected by the position detecting means, the own device is currently registered. In And a determination means for determining whether or not the device has moved from the position, and only when the determination device determines that the device has moved, the position of the device detected by the position detection device is set to the source of the transmission. A location registration method for a mobile communication system, comprising: location registration means for transmitting information to the private branch exchange via a fixed radio and performing registration.