JP2002271831A - Mobile wireless terminal and location registration method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile wireless terminal and a location registration method that can reduce the cost of a system by reducing communication resources shared for location registration. SOLUTION: A control section 100 has a microcomputer as a main control section to totally control each section. Then the control section 100 discriminates whether or not necessity of position registration is caused in a short time as the processing of registering its own position to a control station of a mobile communication system, the control section 100 conducts no position registration processing when the necessity of position registration processing is caused in a short time, but conducts the position registration processing when the necessity of the position registration processing is caused after a lapse of some time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio terminal used in a mobile communication system such as a mobile phone system and a PHS (Personal Handyphone System).

[0002]

2. Description of the Related Art As is well known, portable telephone systems and PHs
In a mobile communication system such as S, a mobile station notifies a control station provided on a communication network of a position where the mobile station is located through a base station, and the control station manages position information of each mobile station. I have. Then, the control station on the basis of the position information,
It controls the transmission and reception of each mobile station.

In a PHS, as shown in FIG. 4, position information of a mobile station is managed in a control station for each paging area formed by a plurality of radio zones of base stations. Mobile stations are called in area units. The management of such mobile station location information is based on P
Not only the HS but also other mobile communication systems are performed in a predetermined paging area unit.

As shown in FIG. 5, when a mobile station moves at high speed and passes through a large number of paging areas in a short time, the mobile station frequently changes its paging area. Accordingly, in each paging area, the mobile station sends a position notification to the control station.

[0005] Thus, for example, In the paging area where the train lines and highways are laid, results in a large number of mobile station passes the communication resources of the base station for position registration is temporarily mass Will be occupied by.

Conventionally, therefore, a base station is provided with a large amount of communication resources in consideration of the fact that a large amount of communication resources are occupied for location registration, especially in a call area where a train line or an expressway is laid. This was a major cause of increasing the cost of the system.

Further, as shown in FIG. 6, when moving around the boundary of the paging area may be a slow-moving,
The paging area suitable for connection frequently changes, and communication resources are occupied by the base station in each paging area.In such a case, the base station should be provided with many communication resources. I needed to.

[0008]

In a conventional mobile communication system, communication resources are temporarily occupied for location registration by a mobile radio terminal device that moves near the border of a paging area, or a train line is used. In a call area where roads and expressways are laid, a large amount of communication resources are temporarily occupied for location registration, so the base station is provided with a large amount of communication resources, thereby increasing the cost of the system. There was a problem that was invited.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a mobile radio terminal apparatus and a location registration capable of reducing communication resources occupied for location registration and reducing system cost. an object of the present invention to provide a method.

[0010]

To achieve the above object of the Invention The present invention relating to claim 1 is used a base station that can be connected to the network including plural mobile communication system, on a network through the base station In a mobile wireless terminal device that communicates with a communication partner, when the mobile wireless terminal device moves, a base station detecting unit that detects a base station suitable for connection and a base station detected by the base station detecting unit are detected. Determining means for determining whether a predetermined time has elapsed from the time, and when a base station suitable for connection is newly detected by the base station detecting means, immediately before the newly detected base station by the determining means It is provided with a position registering means for transmitting the position information of the mobile radio terminal device when a predetermined time has elapsed since the time elapsed since the detection of the detected base station is determined. .

In order to achieve the above object, the present invention according to claim 3 is used in a mobile communication system having a plurality of base stations connectable to a network, and communicates with a communication partner on the network through the base stations. In the position registration method of the mobile wireless terminal device, when the mobile wireless terminal device moves, a base station detection step of detecting a base station suitable for connection, and a base station detected in the base station detection step is detected. A determination step of determining whether a predetermined time has elapsed since the detection of a base station suitable for connection in the base station detection step, and a detection immediately before the newly detected base station in the determination step And a position registration step of transmitting the position information of the mobile radio terminal device when the predetermined time has elapsed since the time when the detected base station is detected is determined.

[0012] In the mobile radio terminal apparatus and the location registration method having the above-described configuration, only when the base station suitable for connection changes and the time required for changing the base station suitable for connection is equal to or more than a predetermined value, The position information of the mobile wireless terminal device is transmitted.

Therefore, according to the mobile radio terminal apparatus and the position registration method having the above-described configurations, the base station suitable for connection can be established in a short time by moving at high speed or moving near the boundary of the radio zone formed by the base station. In this case, since the own location information is not transmitted, the communication resources occupied for the location registration can be reduced, and the cost of the system can be reduced.

In order to achieve the above object, the present invention according to claim 2 is used in a mobile communication system having a plurality of base stations connectable to a network, and communicates with a communication partner on the network through the base stations. In a mobile wireless terminal device, a speed detecting means for detecting a moving speed, a base station detecting means for detecting a base station suitable for connection, a base station detected by the base station detecting means changes, and a speed detecting means Only when the speed detected in step (1) is equal to or less than a predetermined value, the mobile radio terminal device is provided with a position registering means for transmitting position information.

In order to achieve the above object, the present invention according to claim 4 is used in a mobile communication system having a plurality of base stations connectable to a network, and communicates with a communication partner on the network through the base stations. In the position registration method of the mobile wireless terminal device, a speed detection step of detecting a moving speed, a base station detection step of detecting a base station suitable for connection, and the base station detected in the base station detection step changes. Only when the speed detected in the speed detecting step is equal to or lower than a predetermined value, a position registering step of transmitting position information of the mobile wireless terminal device is provided.

In the mobile radio terminal device and the position registration method having the above-described configurations, the position information of the mobile radio terminal device is transmitted only when the base station suitable for the connection changes and the moving speed is low. I have.

Therefore, according to the mobile radio terminal apparatus and the location registration method having the above-described configurations, if the base station suitable for connection changes in a short time due to high-speed movement, the mobile station does not transmit its own location information. In addition, the communication resources occupied for location registration can be reduced, and the cost of the system can be reduced.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. Figure 1 shows a configuration of a communication terminal apparatus according to an embodiment of the present invention, where, TD between the base station connectable to the network
The PHS mobile radio terminal device that performs wireless communication by MA (Time Division Multiple Access) scheme will be described as an example.

The mobile radio terminal shown in FIG. 1 includes a radio unit 10 having an antenna 11, a modem unit 20, a TDM
A section 30, speaker 43 and microphone 44
The communication unit 40 includes (M), a call notification unit 50, a memory unit 60, a user interface unit 70, a sensor 80, and a control unit 100.

The mobile radio-frequency signal sent through the radio speech channel from a base station connected to a communication network, high-frequency switch (S radio unit 10 after being received by the antenna 11
W) 12 to the receiving unit 13.

In the receiving section 13, the received radio frequency signal is mixed with a receiving local oscillation signal generated from the frequency synthesizer 14 and frequency-converted into a receiving intermediate frequency signal.

The local oscillation frequency generated by the frequency synthesizer 14 is instructed by the control unit 100 according to the radio channel frequency. Further, the radio unit 10 is provided with a reception field strength detection unit (RSSI) 16.

The reception field strength detection section 16 receives a radio field signal (hereinafter referred to as RSS) of a radio frequency signal arriving from the base station.
I) is detected, and the detected value is notified to the control unit 100.

The received intermediate frequency signal output from the receiving section 13 is input to a demodulating section 21 of the modem section 20. The demodulation section 21 performs digital demodulation of the received intermediate frequency signal, thereby reproducing a digital communication signal.

The TDMA decoding section 31 of the TDMA section 30
Then, the digital communication signal is decomposed for each time slot according to the instruction of the control unit 100. Then, of the plurality of decomposed digital communication signals, the digital communication signal of the slot addressed to the own device is input to the communication unit 40.

The communication unit 40 includes an adaptive difference PCM transcoder (ADPCM TRANS CODER) 41 and a PCM codec (P
The digital speech signal is sequentially decoded by the adaptive difference PCM transcoder 41 and the PCM codec 42 and reproduced into an analog speech signal. The analog communication signal is amplified by a receiving amplifier (not shown) and then output from the speaker 43.

On the other hand, the transmission voice input to the microphone 44 is sequentially encoded by the PCM codec 42 and the adaptive difference PCM transcoder 41 to become a digital communication signal, which is input to the TDMA encoding unit 32.

In the TDMA encoding unit 32, the digital speech signal output from the adaptive difference transcoder 41 is inserted into a time slot specified by the control unit 100 and input to the modulation unit 22. In the modulation unit 22,
The carrier signal is digitally modulated by the digital communication signal. The carrier signal thus modulated is
It is input to the transmission unit 15.

[0029] In the transmission section 15, by the modulated carrier signal is transmitted local oscillation signal and mixing generated from the frequency synthesizer 14, after being frequency converted to a radio channel frequency instructed by the control unit 100, It is amplified to a predetermined transmission power level. The radio frequency signal thus frequency-converted and signal-amplified by the transmitting unit 15 is transmitted from the antenna 11 to the base station via the high-frequency switch 12.

The incoming call notifying unit 50 notifies the user of an incoming call under the control of the control unit 100 when there is an incoming call to the terminal device, and emits an audible sound to inform the user. And a light emitting body 52 for giving notification by light emission, and a vibrating body 53 for giving notification by generating vibration by, for example, an eccentric motor.

The memory unit 60 uses a semiconductor memory such as a ROM or a RAM as a storage medium. The storage medium stores a control program of the control unit 100, its own ID data required for authentication, and various control data. , Various setting data,
The created e-mail and the received e-mail are stored.

The user interface unit 70 includes a display unit 71 and a key input unit 72. The display unit 71 is an LCD (Liquid Crystal Display) equipped with a backlight, and can display information based on data received from the network through the base station. / Incoming call, remaining battery level, reception strength), dial data read from the memory unit 60, text data such as e-mail, image data, and the like.

The key input section 72 includes a key for performing a normal call function relating to outgoing / incoming calls such as a numeric keypad for inputting a dial number, and an incoming call notifying method (audible sound / light emission / vibrator / no notification). switching, in which with a key for using various settings and various features such as code input ringtone and ringtone. Note that these keys can be used as character input keys when creating an e-mail.

The control unit 100 includes, for example, a microcomputer as a main control unit and controls the above-described units in a centralized manner. The control unit 100 establishes a communication link with a base station, and a mobile communication network. A control function for notifying a control station disposed thereon of a calling area in which the control station is located,
It has various control functions such as the above-described control function of transmitting and receiving voice communication and e-mail by the TDMA method, the timekeeping function by the timer 100a, and the browsing of Web sites by Web browser software.

Although not shown in FIG. 1, as a component of the present apparatus, there is a power supply section which supplies power for operating the above-described sections and has a battery which can be repeatedly charged and discharged.

Next, the operation of the mobile radio terminal having the above configuration will be described. In the following description of the operation, only the operation related to the present invention will be described, and the description of the control operation of each unit related to other normal communication functions will be omitted. These operations are performed under the control of the control unit 100.

The flowchart shown in FIG. 2 shows a process related to location registration. This process is performed immediately after the power of the mobile radio terminal device is turned on under the control of the control unit 100.

[0038] When the power is turned on, first, in step 2a, acquires identification information of the paging area from the connectable base station, identification information of the mobile radio terminal, the identification information of the paging area that the acquired corresponding Then, the location is registered by transmitting to the control station through the base station, and step 2b
Move to In step 2b, the timer 100a is started, its count value is reset to start time measurement, and the process proceeds to step 2c.

In steps 2c, 2d and 2e, it is determined whether or not location registration is required within a short period of time, that is, whether or not the mobile radio terminal device needs to be registered at high speed. judge.

[0040] First, in step 2c, and determines the count value of the timer 100a whether reaches a predetermined value, i.e., whether a time-out. If the timeout has occurred, the process proceeds to step 2d, where the timeout flag stored in the memory unit 60 is turned ON, and the process proceeds to step 2d.
e, but if it has not timed out,
The process directly proceeds to step 2e.

In step 2e, it is determined whether or not the necessity of location registration has newly arisen due to a change in a base station suitable for connection. Here, when the position registration is required, the process proceeds to step 2f. On the other hand, when the position registration is not required, the process proceeds to step 2c.

In step 2f, it is determined whether the timeout flag stored in the memory unit 60 is ON. Here, if the time-out flag is ON, the process proceeds to step 2g, whereas, if the time-out flag is OFF, the process proceeds to step 2i.

In step 2g, the identification information of the calling area is obtained from the connectable base station, and the identification information of the mobile radio terminal device is associated with the obtained identification information of the calling area, and is controlled through the base station. The location is transmitted to the station to perform location registration, and the process proceeds to step 2h.

[0044] In step 2h, and a timeout flag stored in the memory unit 60 to OFF, step 2i
Move to In step 2i, it is monitored through the key input unit 72 whether or not an operation of turning off the power of the mobile wireless terminal device has been performed. Here, when an operation of turning off the power is performed, the process is terminated, and
If the operation of turning off the power is not performed, the process proceeds to step 2b.

As described above, in the mobile radio terminal having the above-described configuration, it is determined in the processing of steps 2c, 2d, and 2e whether or not the necessity of position registration occurs within a short time. Then, in the processing of steps 2f, 2g, 2h, and 2i, as shown in FIG. 3, the time-out flag is ON, that is, due to low-speed movement or the like, a certain amount of time has elapsed and the location registration has become necessary. In such a case, the location registration process is performed. On the other hand, if the time-out flag is OFF, that is, if high-speed movement requires location registration within a short time, the location registration process is not performed. I have.

That is, the moving speed is determined based on the count value of the timer 100a and the occurrence of the necessity of position registration. If the vehicle is moving at a high speed, the position registration processing is not performed. Even in a situation where the user of the mobile wireless terminal device is on a train or the like and the location registration update process frequently occurs, the location registration process is not performed, so that the communication resources of the system are not occupied.

[0047] Thus, according to the mobile radio terminal apparatus having the above structure, during high-speed movement and, in the case that the location registration processing through the vicinity of the boundary of the paging area occurs frequently does not perform the location registration process In addition, the communication resources for the location registration are not occupied, and the communication resources prepared by the system can be smaller than those in the related art, and the cost of the system can be reduced.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the moving speed of the mobile wireless terminal device is determined based on the count value of the timer 100a and the occurrence of the necessity of position registration. There is a method of detecting the moving speed of the mobile wireless terminal device from a change in the base station ID.

An ID is assigned to the base station, and the mobile radio terminal always detects the base station ID.
When the moving speed is low, the area transit time per base station becomes longer, so that the change of the base station ID detected by the mobile radio terminal device is small. On the other hand, when the moving speed is high, the base station ID detected by the mobile radio terminal device changes one after another because the area transit time per base station becomes short.

From the above, it is possible to detect the moving speed of the mobile radio terminal device based on the temporal change amount of the base station ID detected by the mobile radio terminal device. Further, the moving speed itself may be detected by another means, and the position registration may be performed accordingly.

In the above embodiment, the communication method is T
The case where the DMA system is used has been described as an example.
The present invention can be applied to a mobile radio terminal device of a mobile communication system using another communication method such as a DMA (Code Division Multiple Access) method. It goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0052]

As described above, according to the present invention, only when the base station suitable for connection changes and the time until the base station suitable for connection changes is equal to or more than a predetermined value, the present invention is applicable. The position information of the mobile wireless terminal device is transmitted. Further, in the present invention, only when the base station suitable for the connection changes and the moving speed is low, the position information of the mobile radio terminal device is transmitted.

Therefore, according to the present invention, when a base station suitable for connection changes in a short time by moving at a high speed or moving near the boundary of a radio zone formed by the base station, its own Since the position information is not transmitted, it is possible to provide a mobile radio terminal device and a position registration method capable of reducing communication resources occupied for position registration and reducing system cost.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a configuration of an embodiment of a mobile wireless terminal device according to the present invention.

FIG. 2 is a flowchart for explaining location registration processing of the mobile wireless terminal device shown in FIG. 1;

FIG. 3 is a view for explaining a position registration process of the mobile wireless terminal device shown in FIG. 1;

FIG. 4 is a diagram for explaining a paging area of a mobile communication system.

5 is a diagram for explaining a process of location registration of a conventional mobile radio terminal device.

FIG. 6 is a diagram for explaining a state of a mobile wireless terminal device moving near a boundary of a paging area.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Radio | wireless part 11 ... Antenna 12 ... High frequency switch 13 ... Reception part 14 ... Frequency synthesizer 15 ... Transmission part 16 ... Reception electric field strength detection part (RSSI) 20 ... Modem part 21 ... Demodulation part 22 ... Modulation part 30 ... TDMA part 31 ... TDMA decoding unit 32 ... TDMA encoding unit 40 ... communication unit 41 ... Adaptive difference transcoder (ADPCM TRAN)
S CODER) 42 ... PCM codec (PCM CODEC) 50 ... incoming call notifying section 51 ... sounding body 52 ... light emitter 53 ... vibrating body 60 ... memory unit 70 ... user interface unit 71 ... display 72 ... key input unit 100 ... control unit 100a ... timer

Claims (4)

[Claims] 1. A mobile radio terminal device used in a mobile communication system having a plurality of base stations connectable to a network and communicating with a communication partner on the network through the base station, wherein the mobile radio terminal device moves. A base station detecting means for detecting a base station suitable for connection; a determining means for determining whether a predetermined time has elapsed since the base station detected by the base station detecting means has been detected; and When a new base station suitable for connection is detected by the base station detecting means, the time elapsed since the base station detected immediately before the newly detected base station is detected by the determining means is determined, And a position registration unit for transmitting position information of the mobile wireless terminal device when the predetermined time has elapsed. 2. A mobile wireless terminal device used in a mobile communication system having a plurality of base stations connectable to a network and communicating with a communication partner on the network through the base station, a speed detecting means for detecting a moving speed. A base station detecting means for detecting a base station suitable for connection; a base station detected by the base station detecting means changes and a speed detected by the speed detecting means is lower than a predetermined value. And a location registering means for transmitting location information of the mobile wireless terminal device. 3. A location registration method for a mobile wireless terminal device used in a mobile communication system having a plurality of base stations connectable to a network and communicating with a communication partner on the network through the base station, A base station detecting step of detecting a base station suitable for connection when moving, and determining whether or not a predetermined time has elapsed since the base station detected in the base station detecting step is detected. And when detecting a base station newly suitable for connection in the base station detecting step, the time elapsed from when detecting the base station detected immediately before the newly detected base station in the determining step And a location registration step of transmitting location information of the mobile radio terminal device when the predetermined time has elapsed. 4. A position registration method for a mobile radio terminal device used in a mobile communication system having a plurality of base stations connectable to a network and communicating with a communication partner on the network through the base station, wherein a moving speed is detected. A speed detection step, a base station detection step of detecting a base station suitable for connection, a base station detected in the base station detection step changes, and the speed detected in the speed detection step is equal to or less than a predetermined value. And a location registration step of transmitting location information of the mobile wireless terminal device only when there is a location registration method.