JP2001061177A - Wireless phone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid unnecessary position registration from being conducted in the case where a wireless phone is deemed to move at a speed or over. SOLUTION: A wireless phone is provided with a storage means 62 that stores registration position information, when a position registration request is sent to a base station, a position information acquisition means 57 that acquires notice position information notified from the base station, and a position registration control means 58 that transmits a position registration request to the base station, when the notice position information acquired by the position information acquisition means 57 differs from the registered position information, and the same notice position information is obtained after the lapse of a prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio telephone device such as a PHS terminal which is a mobile station in a personal handy phone system (PHS).

[0002]

2. Description of the Related Art There are two types of personal handyphone system network configurations: an NTT network utilizing type utilizing an NTT network and an NTT network connecting type utilizing a regional NCC. Here, the NTT network utilization type is taken as an example.

A general subscriber telephone is fixedly connected to a network by a wire, and a telephone terminal and an installation position are associated in advance. On the other hand, in the personal handyphone system, a PHS terminal (PS) and a network are wirelessly connected. In order to be able to receive a call to the PHS terminal connected by radio, it is necessary to always update and register the position of the PHS terminal in the PHS service control station.

The operation of updating and registering the position information of the PHS terminal is called position registration. Generally, in a personal handyphone system, a base station always notifies position information, and a PHS terminal (PS) stores the position information. PHS
When the terminal receives position information different from the stored position information from the base station, the terminal makes a position registration request to the network. The network updates the PHS terminal location information to the PHS service control station via the common channel signaling network in accordance with the location registration request.

[0005] In general, location registration is performed by setting the maximum value among the detection levels (RSSI) of the radio wave reception levels from all base stations detected by the PHS terminal (PS) at the relevant location among those exceeding a predetermined value. This is performed by selecting a base station indicating the reception level and transmitting a position registration request using the position information transmitted from the base station.

More specifically, the operation is performed as shown in FIG. In other words, every time the power is turned on or in the standby state, every predetermined time elapses, the radio wave emitted from the base station that can be detected at the position is set to an RSSI level that is equal to or higher than the predetermined value and the maximum. The base station capable of receiving at the RSSI level is measured and selected (501), and it is determined whether there is a corresponding base station (502). Here, when there is a base station that satisfies the above condition, the mobile station receives the position information sent from the base station (503), determines whether it is the same as the already stored position information (504), and If the position information is different, it is considered that the area has been moved, and the position is registered using the new position information (50).
5).

In general, in a PHS system, in order to reduce the load on the network, a plurality of base stations report the same location information to form one location registration area, and the PHS system moves beyond this relatively large location registration area. It is sufficient to perform the location registration only when the error occurs.

On the other hand, when a call arrives at the PHS terminal (PS), the network obtains location information from the PHS service control station based on the dialed PHS number and notifies the nearest exchange station of the call arrival. When an incoming call is received, the exchange performs simultaneous incoming call processing to the base stations connected to the location registration area to which the PHS terminal belongs, and the PHS terminal is a base station having the best radio wave condition among a plurality of base stations. Select to communicate. In addition, since these location registration and acquisition processing of location information are performed through a common channel signal network,
Each time, the usage fee is charged from the NTT to the PHS carrier.

[0009]

As described above, in the conventional location registration method, the reception level detection values (RSSI) of the radio waves from all the base stations detected by the PHS terminal (PS) at the location when the location registration is activated. Location registration is performed for the base station indicating the highest reception level from among those exceeding a certain specified value. For example, many people with PHS terminals (PS) move by train or bus, and Even when the user temporarily arrives at a bus terminal or the like and departs again, the location registration is performed simultaneously from a large number of PHS terminals (PS) to a specific base station. There is a problem that a PHS terminal (PS) that cannot be registered due to the occurrence occurs.

Further, even when the location registration area changes instantaneously, such as during high-speed movement, there is a problem that unnecessary location registration operations are performed many times. The present invention has been made to eliminate this problem, and its purpose is to prevent unnecessary position registration from being performed when it seems that the user is moving at a certain speed or higher. An object of the present invention is to provide a wireless telephone device such as a handy phone system.

[0011]

According to the present invention, there is provided a radio telephone apparatus comprising: storage means for storing registered position information when a position registration request is transmitted to a base station; and acquisition of reported position information notified from the base station. A location information acquisition unit that performs location registration with the base station when the same location information is obtained after a predetermined time elapses, when the notification location information acquired by the location information acquisition unit is different from the registered location information. And a location registration control means for sending a request. Thus, when the obtained broadcast location information and the registered location information are different, if the same broadcast location information is obtained after a predetermined time has elapsed, a location registration request is sent to the base station, and the same broadcast location information is sent. Location registration is performed when the user stays at the location where the location information can be obtained for a predetermined time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A personal handyphone system according to an embodiment of the present invention will be described below with reference to the accompanying drawings. In the following description, a PHS terminal is taken as an example, but other communication terminals such as a mobile phone can be similarly configured. This PHS terminal is, as shown in FIG.
A radio unit 1 having an antenna 11, a modem unit 2, and a TD
An MA unit 3, a communication unit 4, a control unit 5, and a power supply unit 7 are provided. The control unit 5 includes an operation unit 51 including various keys and the like, an LCD (liquid crystal display) 52 and an LCD control unit 53 for controlling the same, a sounder 54 for generating a ringing tone, and vibration of an incoming call. Vibrator 59 is connected.

In the above PHS terminal, the home base station BSH
Alternatively, a radio frequency signal arriving from the public base station BSP is received by the antenna 11 and reaches the reception unit 13 via the high frequency switch (SW) 12 of the radio unit 1. In the receiving unit 13, the radio frequency signal received as described above is mixed with a receiving local oscillation signal generated from the frequency synthesizer 14 and converted into a receiving intermediate frequency signal. The local oscillation frequency generated by the frequency synthesizer 14 is instructed by the control unit 5 according to the radio channel frequency. Further, the radio unit 1 is provided with a reception electric field strength (RSSI) detection unit 16. This reception electric field strength detection unit 1
6 is a home base station BSH or a public base station BS
The received electric field strength of the radio frequency signal arriving from P is detected, and the detected value is notified to the control unit 5.

The received intermediate frequency signal output from the receiving section 13 is sent to the digital demodulation circuit 21 of the modem section 2. The digital demodulation circuit 21 digitally demodulates the received intermediate frequency signal, thereby reproducing a digital communication signal.

The TDMA decoder 31 of the TDMA unit 3
In accordance with an instruction from the control unit 5, a digital communication signal is extracted from a time slot assigned to the own device, and the extracted digital communication signal is transmitted to the communication unit 4. The communication unit 4 uses an adaptive differential PCM codec (ADPCM-COD).
EC) 41 and a PCM codec (PCM-CODE)
C) 42, and the digital speech signal is sequentially decoded by the adaptive difference PCM codec 41 and the PCM codec 42 to reproduce an analog speech signal.
The reproduced analog call signal is output from the speaker 43 after being amplified by a receiver amplifier (not shown).

On the other hand, the transmitted voice input to the microphone 44 is sequentially encoded by the PCM codec 42 and the applied differential PCM codec 41 to be a digital speech signal. In the TDMA encoder 32, the digital communication signal transmitted from the adaptive difference codec 41 is inserted into a time slot specified by the control unit 5 and transmitted to the digital modulation circuit 22. In the digital modulation circuit 22, the carrier signal is modulated by the digital communication signal, and the modulated signal according to the modulation result is transmitted to the transmission unit 15. In the transmitting section 15, the modulated signal is mixed with the transmitting local oscillation signal generated from the frequency synthesizer 14 to be frequency-converted to the radio channel frequency instructed by the control section 5, and further amplified to a predetermined transmission power level. Is done. The radio frequency signal transmitted from the transmitting unit 15 is transmitted from the antenna 11 via the high frequency switch 12 to the home base station BSH or the public base station BS.
Sent to P.

The power supply unit 7 includes a battery 71 composed of a secondary battery.
And the output voltage of the battery 71 is changed to a predetermined operating voltage Vcc.
And a power supply circuit 72 for converting the power supply to In the above, the transmission unit 15, the digital modulation circuit 22, and the TDMA encoder 32 constitute a transmission system for transmitting data such as a message, and the reception unit 13, the digital demodulation circuit 21, and the TD
The MA decoder 31 constitutes a receiving system for receiving data such as a message, and the transmitting system and the receiving system constitute a message transmitting means for transmitting a message and a message receiving means for receiving a message, respectively. The message is created by the operation unit 51. The operation unit 51
A character input unit such as a touch panel is provided in addition to the key input unit. The message to be transmitted, which is input by operating the operation unit 51, is transmitted from the control unit 5 through the path of the TDMA encoder 32, the digital modulation circuit 22, and the transmission unit 15.
On the other hand, the received message is provided to the control unit 5 through a path of the receiving unit 13, the digital demodulation circuit 21, and the TDMA decoder 31.

The control unit 5 is connected to the memory 6 and includes a position information acquisition unit 57, a position registration control unit 58, and a timer 61. The memory 6 has position information (registered position information) at the time of transmitting the position registration request to the base station.
Is provided. The position information acquisition means 57 of the control unit 5 acquires position information (reported position information) reported from the base station. The position registration control unit 58 stores the position information (reported position information) acquired by the position information acquisition unit 57 and the storage unit 6 of the memory 6.
If the same notification position information is obtained after a lapse of a predetermined time in a case where the registration position information of the second is different from the registered position information, a position registration request is transmitted to the base station. The timer 61 is used by the position registration control unit 58 to detect the elapse of a predetermined time. Although a predetermined default value is set as the timer value set in the timer 61, a predetermined key operation can be performed from the operation unit 51 and an arbitrary numerical value can be input and set.

The PHS terminal configured as described above is used in a PHS system utilizing the NTT network as shown in FIG. In FIG. 2, a PHS terminal (PS) 8
-1 to 8-n are used in the location registration areas A, B, C, and D. A plurality of wireless base stations 9B-1 to 9B-n are provided in the position registration area B, and a plurality of wireless base stations 9C-1 to 9C-n are provided in the position registration area C. The location registration areas A and D have the same configuration but are not shown. Here, a plurality of wireless base stations in the same location registration area are formed such that an arbitrary number of adjacent wireless base stations report the same location information to form one location registration area.

The radio base stations 9B-1 to 9B-n and the radio base stations 9C-1 to 9C-n are connected to the PHS connection device 10-1,
10-2 local exchanges 81-1 and 81- through NTT
2 is connected. Furthermore, local exchanges 81-1 and 8
1-2 is connected to the toll switches 82-1 and 82-2, and the toll switches 82-1 and 82-2 are connected to each other to enable long-distance communication. In addition, local exchanges 81-1, 8
1-2 is connected to a PHS service control station 84 which manages PHS number information and position information via a common channel signaling network 83. A local telephone 85 is connected to the local exchange 81-1 (the same applies to the local exchange 81-2).

The control unit 5 operates as each means by executing the program of the flowchart shown in FIG. 3 and will be described. First, the reception level detection value (RS) of the radio wave from all the base stations detected at the position at every predetermined time from the standby state of the PHS terminal (PS).
The base station indicating the maximum reception level detection value (RSSI) is measured from among those whose SI) exceeds a predetermined value (30).
1). Next, it is determined whether there is a corresponding base station (302). If there is no corresponding base station, the mobile station is out of the service area and outgoing / incoming is disabled.

On the other hand, if it is determined in step S302 that there is a corresponding base station, position information is received (303). At this time, the wireless base station 9B-1 in FIG.
To 9B-n, and the base stations A to 9C-1 to 9C-n.
To P, and PHS terminals (PS) 8-1 to 8-n are represented by PS
Suppose that reception level detection values (RSSI) are obtained from the base stations A to M with the values of, for example, PS-a to n as shown in FIG. In such a case, the base stations A to M corresponding to the fields indicated by the circles are selected.

Then, after step 303, it is determined whether the position information is the same as the position information stored in the storage means 62 in the previous position registration (304). If it is detected in the previous location registration that the location information is the same as the location information stored in the storage unit 62, no new location registration is performed, and the apparatus enters the standby state.

On the other hand, if it is detected in step 304 that the position information is different from the position information stored in the storage means 62 in the previous position registration, the position information is temporarily stored in the memory 6 and the timer The timer value set in advance is set to 61 (305), and it is checked whether the timer 61 has timed out (306). If the timeout has not occurred, the timer value is decremented (30
7) Wait for timeout. If a timeout occurs, the location information is received again (308). Here, the newly received position information is compared with the position information received previously and temporarily stored in the memory 6 to detect whether the same position information has been received (309). As a result of this detection, if the same position information has been received, it has been in the same area for a predetermined time, a new position registration request is sent to the base station, and the position information in the storage means 62 is updated. Update (310). If the position information is different in the determination in step 309, it is regarded that the vehicle is moving at high speed, and a new position registration request and update registration in the storage unit 62 are not performed.

In the present embodiment, a timer 61 for detecting the same position information continuously is provided in the present embodiment, and when a position registration request is made, the control channel of the same base station is continuously provided for the time set in the timer 61. It is determined whether or not the base station receives the position information by the control channel of the same base station continuously for the time set in the timer 61 or not. Since a registration request is made, unnecessary position registration during high-speed movement can be suppressed. Then, congestion due to unnecessary location registration can be prevented, and the number of location registrations can be reduced. In addition, there is an advantage that the usage fee of the common channel signaling network can be reduced accordingly. When the power is turned on, the position is registered by the processing shown in FIG.

[0026]

As described above, according to the wireless telephone apparatus of the present invention, when the acquired notification location information and the registered location information are different, the same notification location information is obtained after a predetermined time has elapsed. Then, a location registration request is sent to the base station, and location registration is performed when the user stays in a place where the same broadcast location information can be obtained for a predetermined time, so that high-speed movement or the like can be performed. In the case of unnecessary location registration,
It is possible to reduce a line usage fee and prevent a congestion state due to location registration.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wireless telephone device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a PHS system utilizing an NTT network.

FIG. 3 is a flowchart showing an operation of the wireless telephone device according to the embodiment of the present invention.

FIG. 4 is a diagram showing a relationship between a base station selected in a system using the wireless telephone device according to the embodiment of the present invention and RSSI.

FIG. 5 is a flowchart showing the operation of a wireless telephone device according to a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Radio | wireless part 2 Modem part 3 TDMA part 4 Talk part 5 Control part 6 Memory 51 Operation part 52 LCD 53 LCD control part 54 Sounder 57 Position information acquisition means 58 Position information registration control means 61 Timer 62 Storage means

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K027 AA11 CC08 5K067 AA11 BB04 DD19 DD44 EE02 EE10 HH22 HH23 JJ52 JJ66 JJ68

Claims (3)

[Claims] 1. A storage unit for storing registered position information when a position registration request is sent to a base station, a position information obtaining unit for obtaining notification position information notified from the base station, and the position information obtaining unit A location registration control unit that sends a location registration request to the base station when the same broadcast location information is obtained after a lapse of a predetermined time when the broadcast location information to be obtained is different from the registered location information. A wireless telephone device characterized by the above-mentioned. 2. The radio communication system according to claim 1, wherein the location registration control means stores, in the storage means, broadcast location information as registered location information when transmitting a location registration request to the base station. Telephone equipment. 3. The apparatus according to claim 1, further comprising time setting means for changing and setting the predetermined time.
A wireless telephone device according to item 1.