JP5077533B2 - Time correction device, time measuring device with time correction device, and time correction method - Google Patents

Description

  The present invention relates to a time adjustment device that performs time adjustment based on time information included in a signal transmitted from a mobile base station in a CDMA (Code Division Multiple Access) mobile phone communication network, and time correction The present invention relates to a timing device with a device and a time correction method.

Currently, a signal transmitted from a mobile base station to a mobile phone in a CDMA mobile phone communication network includes time information. This time information is a GPS based on an atomic clock of a GPS (Global Positioning System) satellite. It is extremely accurate time information that matches the time.
Therefore, a proposal has been made in which a terminal acquires GPS time data transmitted from a mobile base station via the CDMA mobile phone communication network, and corrects the time data of the internal clock using the GPS time data ( For example, Patent Document 1).
JP 2000-321383 A (summary etc.)

  However, for example, the frequency of data transmitted from a mobile base station in a CDMA mobile phone communication network may be different in the same country as in the United States. Also, this frequency is transmitted at a different frequency for each country. For example, in the case of a mobile phone, if you want to receive services in a country different from the contracted country due to the relationship with the roaming contract, (Also referred to as a user) had to manually set the frequency and country, or transmitted information related to the roaming contract from the mobile phone to the mobile base station.

  Therefore, the present invention can receive a frequency band transmitted from a mobile base station via a CDMA mobile phone value communication network even when a user or the like moves to a different frequency band region. It is an object of the present invention to provide a time adjustment device, a time measuring device with a time adjustment device, and a time adjustment method capable of automatically adjusting the time based on transmission data of a frequency band.

According to the present invention, the object is to receive a mobile base station signal including time information transmitted from a mobile base station in a CDMA (Code Division Multiple Access) mobile phone communication network. A time adjustment device for correcting display time information of a time display unit based on a base station signal, a frequency detection unit for detecting a frequency of the mobile base station signal emitted by the mobile base station, and a transmission from the mobile base station A mobile base station frequency information storage unit that stores a plurality of types of mobile base station frequency information related to the mobile base station signal, and the frequency detection unit is stored in the mobile base station frequency information storage unit Detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the plurality of types of mobile base station frequency information Upon detecting the frequency of the mobile base station signals corresponding to the plurality of types of said portable base station frequency information identifies the mobile base station from the frequency, capable of receiving the frequency of the mobile base station signals Stored in the receivable frequency information storage unit as frequency information, receive the mobile base station signal, perform time correction based on the time information included in the mobile base station signal, and differ for each mobile base station This is achieved by a time adjusting device characterized in that the time is corrected by the pilot PN offset transmitted at the timing .

According to the above configuration, since the time correction device has a plurality of types of mobile base station frequency information in advance, even when the user moves to a place where the frequency of the mobile base station signal transmitted from the mobile base station is different, Based on a plurality of types of mobile base station frequency information in the time adjustment device, a mobile base station signal including time information transmitted from the mobile base station for each location can be received.
For this reason, even if the user does not set the reception frequency himself / herself or inputs the destination, the frequency of the mobile base station signal transmitted from the mobile base station at each location and the reception of the time adjustment device can be quickly and automatically transmitted. The frequency can be adjusted, and a signal including time information can be quickly received, and the time can be automatically adjusted.

For example, as the frequency of the mobile base station signal transmitted from the mobile base station, a convenient frequency is selected from a plurality of types according to the country and used. Therefore, if the country of use is different, it cannot be used unless the frequency setting is changed. Also, depending on the country, there are cases where several frequencies are used in one country. In such a case, even if movement is within the same country, reception may not be possible. However, according to the configuration of the present invention, since multiple types of mobile base station frequency information are stored in the time adjustment device, the frequency setting is arbitrarily changed based on the multiple types of mobile base station frequency information. In addition, since the time can be automatically changed at regular intervals, the time can be corrected without bothering the user or the like.
According to the above configuration, since the mobile base station signal transmitted from the mobile base station is a signal transmitted from the mobile base station in the CDMA mobile phone communication network, the CDMA mobile phone communication network is used. Thus, it is possible to automatically perform time correction with high accuracy.

  Preferably, the plurality of types of mobile base station frequency information are achieved by a time correction device that is stored for each band class.

According to the said structure, since it stores for every band class, it can confirm rapidly for every used frequency band.
That is, for a plurality of types of mobile base station frequency information used in each country, a convenient frequency for each country is selected from, for example, a band class. Therefore, if multiple types of mobile base station frequency information are stored for each band class, it can be confirmed for each frequency band assigned to that band class.

  Preferably, a detection frequency information storage unit that counts the number of times that the mobile base station frequency information of the plurality of types is stored in the receivable frequency information storage unit as the receivable frequency information and stores it as detection frequency information. The detection frequency information storage unit is configured to store the detection frequency information in association with the plurality of types of mobile base station frequency information, and the frequency detection unit includes the plurality of types of the mobile base station frequency information. Out of the detection frequency information corresponding to the base station frequency information, the detection frequency information is transmitted from the mobile base station in order of the plurality of types of the mobile base station frequency information corresponding to the relatively large detection frequency information. Detect the frequency of the mobile base station signal, and store the frequency of the mobile base station signal as the receivable frequency in the receivable frequency information storage unit Is achieved by the time adjustment device, characterized in that it is configured to detect until the.

  According to the above configuration, the detection number storage unit that counts the number of times stored in the receivable frequency information storage unit as receivable frequency information among the plurality of types of mobile base station frequency information and stores it as detection number information. Detection frequency information is stored in association with a plurality of types of mobile base station frequency information, and among the detection frequency information, a plurality of types of mobile base stations corresponding to detection frequency information in which the detection frequency information is relatively large The frequency of the mobile base station signal transmitted from the mobile base station is detected in the order of frequency information, and is detected until the frequency of the mobile base station is stored in the receivable frequency information storage unit as the receivable frequency. For this reason, a plurality of types of mobile base station frequency information are not detected in order from the beginning, and the probability that they can be received increases. In addition, since the time required for reception can be shortened, the power consumption of the time adjustment device can be reduced. And it becomes possible to receive the mobile base station signal from a mobile base station promptly, and time correction can be performed automatically promptly.

  Preferably, it has a previous reception mobile base station frequency information storage unit that stores the receivable frequency information stored in the receivable frequency information storage unit as previous reception mobile base station frequency information, the frequency detection unit, A configuration for detecting the frequency of the mobile base station signal using the previous received mobile base station frequency information and detecting the mobile base station signal upon detection after storing the previous received mobile base station frequency information; This is achieved by a time adjustment device characterized in that

According to the above configuration, when the time is corrected, the frequency of the mobile base station signal received last time and the mobile base station frequency information corresponding to the frequency of the mobile base station signal stored therein are stored as the previous reception mobile base station frequency information. Stored as received mobile base station frequency information, using the previous received mobile base station frequency information, upon detection after being stored in the previous received mobile base station frequency information storage unit, in other words, upon receiving this time, If the frequency of the mobile base station signal is detected, the time required for reception can be shortened and the power consumption of the time adjustment device can be reduced, and it is possible to quickly receive the mobile base station signal from the mobile base station, The time can be adjusted promptly.
In other words, it is rare that the user has moved to the location of the mobile base station that is transmitting the mobile base station signal of a different frequency at the timing of the time adjustment of the previous time and this time. If the current detection is performed using the mobile base station frequency information corresponding to the frequency of the base station signal, the reception probability becomes higher and the power consumption can be further reduced.

Preferably, the mobile base station signal reception date and time when the frequency of the mobile base station signal stored in the receivable frequency storage unit as the receivable frequency information is detected and the frequency corresponding to the mobile base station signal A portable base station signal reception date storage unit that stores the corresponding mobile base station frequency information in association with each other, and the portable base station signal reception date storage unit stores the portable base station signal reception date and the portable a base station frequency information has a structure that remembers the order in which the cellular base station signal reception date is updated, the frequency detecting section, in the order of the mobile base station signal reception date storage unit, or the In reverse order, receiving the mobile base station signal by detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the mobile base station frequency information, It is achieved by the time adjustment device according to claim which is configured to detect the serial receivable information to be stored in the receivable information storage unit.

According to the above configuration, the mobile base station signal reception date and time at which the frequency of the mobile base station signal stored in the receivable frequency storage unit as the receivable frequency information is detected, and the frequency corresponding to the frequency corresponding to the mobile base station signal in association with a portable base station frequency information, and the mobile base station signal reception date has to be stored in order to be updated in mobile base station signal reception date storage unit, and the order or the order is In reverse order, based on the mobile base station frequency information, the frequency of the mobile base station signal transmitted from the mobile base station is detected, the mobile base station signal is received, and the receivable information can be received It is detected until it is stored in the information storage unit.

  For this reason, since the frequency of the mobile base station signal can be detected in the order of the mobile base station signal reception date and time stored in the mobile base station signal reception date and time storage unit or in the reverse order, for example, the user A mobile base station that corresponds to the frequency of the mobile base station signal that is the transmission signal of the mobile base station that can be received for each date and time, such as when moving in the same route or when moving in the opposite direction Since the frequency information is stored, when the user moves, the mobile base station signal from the mobile base station can be quickly received, the time can be adjusted quickly, and the time can be shortened and the power consumption can be reduced. . In addition, if the mobile base station signal reception date and time stored in the mobile base station signal reception date and time storage unit is used, the mobile base station frequency information corresponding to the latest mobile base station signal reception date and time is used. Information necessary for time correction can be obtained by detecting the frequency of the mobile base station signal of the mobile base station corresponding to the existing area, and the time can be corrected. Then, the power consumption of the time adjustment device can be reduced, and the time adjustment time can be shortened.

  Preferably, the frequency detection unit is achieved by a time correction device configured to input, specify and detect via an external input unit operable by a user.

  According to the above configuration, the frequency detection unit is configured to detect and input the configuration via the external input unit that can be operated by the user based on the plurality of mobile base station frequency information. The order of detection can be set according to.

The problem is that a mobile base station signal including time information transmitted from a mobile base station is received by a CDMA (Code Division Multiple Access) type mobile phone communication network, and based on the mobile base station signal A time measuring device with a time adjusting device for correcting display time information of a time display unit, the frequency detecting unit detecting the frequency of the mobile base station signal emitted by the mobile base station, and the mobile base station transmitting the frequency A mobile base station frequency information storage unit that stores a plurality of types of mobile base station frequency information related to mobile base station signals, and the frequency detection unit stores the plurality of types stored in the mobile base station frequency information storage unit Detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the mobile base station frequency information Wherein upon detecting the frequency of the mobile base station signal identifies the mobile base station from the frequency, capable of receiving the frequency of the mobile base station signal frequency corresponding to a plurality of types of said portable base station frequency information Information stored in a receivable frequency information storage unit, receiving the mobile base station signal, correcting the time based on the time information included in the mobile base station signal, and different timings for each mobile base station This is achieved by a time measuring device with a time adjusting device characterized in that the time is corrected by the amount of pilot PN offset transmitted in (1) .

The problem is that a mobile base station signal including time information transmitted from a mobile base station is received by a CDMA (Code Division Multiple Access) type mobile phone communication network, and based on the mobile base station signal A time correction method for correcting display time information of a time display unit, the frequency detection step being a step of detecting the frequency of the mobile base station signal emitted by the mobile base station, and the frequency transmitted from the mobile base station A mobile base station frequency information storage unit that stores a plurality of types of mobile base station frequency information related to a mobile base station signal, and the frequency detection step stores the plurality of types stored in the mobile base station frequency information storage unit Detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the mobile base station frequency information of Upon detecting the frequency of the serial plurality of said mobile base station signal and the corresponding mobile base station frequency information identifies the mobile base station from the frequency, capable of receiving the frequency of the mobile base station signals Stored in the receivable frequency information storage unit as frequency information, receive the mobile base station signal, perform time correction based on the time information included in the mobile base station signal, and differ for each mobile base station This is achieved by a time correction method characterized in that it is a step of correcting the time by the pilot PN offset transmitted at the timing .

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.
The embodiments described below are preferred specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments.

(First embodiment)
FIG. 1 is a schematic view showing a timepiece with a time adjustment device, for example, a wristwatch 10 with a time adjustment device (hereinafter referred to as a “watch”), which is a timekeeping device with a time adjustment device according to the present invention, and FIG. It is the schematic which shows the main hardware constitutions.
As shown in FIG. 1, a wristwatch 10 has a dial 12, a long hand, a short hand 13 and the like disposed on the surface of the wristwatch 10 and a display 14 formed of LEDs and the like for displaying various messages. The display 14 may be an LCD, an analog display or the like in addition to the LED.

As shown in FIG. 1, the wristwatch 10 has an antenna 11, and this antenna 11 is configured to receive signals from CDMA base stations 15a, 15b and the like. That is, the CDMA base station 15a and the like are mobile base stations of a CDMA mobile phone communication network.
However, since the wristwatch 10 of the present embodiment does not have a mobile phone function, it does not perform telephone communication with the CDMA base station 15a or the like, but receives time information from a signal transmitted from the CDMA base station 15a or the like. However, it is intended to correct the time based on the signal. The contents of the signal transmitted from the CDMA base station 15a will be described later.
As shown in FIG. 1, the wristwatch 10 has a crown 28 that can be operated by the user.
The crown 28 is an example of an external input unit that can be operated by the user of the wristwatch 10.

First, the hardware configuration of the wristwatch 10 of FIG. 1 will be described. As shown in FIG. 2, the wristwatch 10 includes a bus 20, and a CPU (Central Processing Unit) 21, a RAM (Random Access Memory) 22, a ROM (Read Only Memory) 23, and the like are connected to the bus 20.
Further, for example, a CDMA base station radio wave receiver 24 that is a receiving unit that receives a signal from the CDMA base station 15 a or the like is connected to the bus 20. The CDMA base station radio wave receiver 24 has the antenna 11 of FIG.
Also connected to the bus 20 are a real-time clock (RTC) 25 comprising a clock mechanism IC (semiconductor integrated circuit), a crystal oscillation circuit with temperature compensation circuit (TCXO) 26, and the like.

  As described above, the dial 12, the needle 13, the RTC 25, the TCXO 26, and the like in FIG. 2 are examples of a time information display unit that displays display time information.

  Further, a battery 27 is connected to the bus 20, and the battery 27 is an example of a power supply unit that supplies power for communication by a receiving unit (for example, the CDMA base station radio wave receiver 24).

  Further, the display 14 crown 28 of FIG. 1 is connected to the bus 20. As described above, the bus 20 is an internal bus having a function of connecting all devices and having an address and a data path. The RAM 22 processes a predetermined program and controls the ROM 23 and the like connected to the bus 20. The ROM 23 stores various programs and various information.

3 to 6 are schematic views showing the main software configuration and the like of the wristwatch 10 in the present embodiment, and FIG. 3 is an overall view.
As shown in FIG. 3, the wristwatch 10 has a control unit 29, and the control unit 29 includes various programs in the various program storage units 30 shown in FIG. 3, various data in the first various data storage unit 40, and The second data storage unit 50 is configured to process various data.
In FIG. 3, the various program storage unit 30, the first various data storage unit 40, and the second various data storage unit 50 are shown separately, but actually the data is stored separately in this way. However, they are shown separately for convenience of explanation.
Note that the first various data storage unit 40 in FIG. 3 mainly shows data stored in advance. Further, the second various data storage unit 50 mainly shows data after the data in the first various data storage unit 40 is processed by the programs in the various program storage units 30.
4 is a schematic diagram showing data in the various program storage units 30 of FIG. 3, and FIG. 5 is a schematic diagram showing data in the first various data storage units 40 of FIG. FIG. 6 is a schematic diagram showing data in the second various data storage unit 50 of FIG.
7 to 10 are schematic flowcharts showing main operations and the like of the wristwatch 10 according to the first embodiment.

First, before entering the description of the flowcharts and the like of the respective embodiments, a portion related to the present embodiment in the CDMA mobile phone system will be described.
The CDMA mobile phone system has been in full operation since the system developed by Qualcomm Corp. in the United States was adopted in 1993 as one of the US standard systems "IS95". Since then, IS95A and IS95B , Through the revision of CDMA2000. In Japan, a mobile phone system is operated according to ARIB STD-T53.
In such a CDMA system, since the downlink (from the CDMA base station 15a or the like to the mobile station, in this embodiment, the wristwatch 10) is synchronous communication, the wristwatch 10 needs to synchronize with time data of the CDMA base station 15a or the like. A radio wave signal (hereinafter also simply referred to as “signal”) that is a CDMA base station signal transmitted from the CDMA base station 15a or the like specifically includes a pilot channel signal and a sync channel signal. The pilot channel signal is a signal transmitted at a different timing for each CDMA base station 15a and the like, for example, a pilot PN signal.

For the signal from the CDMA base station 15a and the like, different frequencies are selected and used for each country.
Therefore, when a user or the like moves to a different country, the frequency is different, so that a signal from the CDMA base station 15a or the like cannot be received. Therefore, it is usually necessary for a user or the like to manually change the frequency setting.
In addition, the frequency band to be used is assigned for each band class (hereinafter referred to as “BC”) defined in CDMA2000 (IS-2000), for example, and specifically assigned to 11 types from BC0 to BC10. It has been. (See FIG. 13) And, a convenient BC is used for each country. An example is shown in FIG. Here, each of BC0 to BC10 shown in FIG. 13 is an example of a plurality of types of mobile base station frequency information related to mobile base station signals transmitted from the mobile base station. The CDMA base station 15a and the like are examples of a mobile base station and the like. A radio signal that is a CDMA base station signal or a CDMA base station signal, or a signal transmitted from the CDMA base station is all of the mobile base station signal. It is an example.
For example, Japan uses the BC3 frequency band. If the wristwatch 10 or the like used by the user is set to receive signals in the frequency band of BC3, the signal from the CDMA base station 15a or the like can be received. Since BC3 is used in Japan, it can be seen that the user is in Japan.

However, when the user or the like moves to another country with this setting, the BC used in the other country is different. Therefore, unless the setting of the frequency that can be received by the wristwatch 10 used by the user is changed. A signal from the CDMA base station 15a or the like in another country cannot be received.
In the case of the United States of America, both BC0 and BC1 are used, and even when moving within the same country, the location may be the location of the CDMA base station 15a or the like transmitting signals of different frequencies. Cannot receive a signal from the CDMA base station 15a or the like.
In the case of a CDMA mobile terminal, a call roaming contract with a different telecommunications company is required for each region or country. To cope with this contract, a user or the like operates the CDMA mobile terminal to operate the BC or country name. Is set manually, and after connecting to the CDMA base station 15a or the like, the information of the CDMA mobile terminal is transmitted from the CDMA mobile terminal side to the CDMA base station 15a or the like as information necessary for a call roaming contract. .

  However, in the case of the wristwatch 10 or the like as in the present embodiment, the call roaming contract is not restricted. In the case of the wristwatch 10, only a signal transmitted from the CDMA base station 15a or the like is received, so that a call roaming contract is unnecessary, and the terminal side of the wristwatch 10 or the like does not require a CDMA base station. There is no need to send information to 15a or the like.

Here, signals transmitted from the CDMA base stations 15a and 15b and the like will be described.
FIG. 19 is a schematic diagram showing synchronization timings and the like of signals transmitted from the CDMA base stations 15a and 15b.
Since the signals transmitted from these CDMA base stations 15a and 15b are the same, in order to identify which CDMA base station 15a etc. this signal originated from, each CDMA base station 15a etc. A signal is transmitted at a timing different from that of the base station 15a or the like.
Specifically, this difference in timing appears as a difference in pilot PN signals transmitted from the CDMA base station 15a and the like. That is, for example, the CDMA base station 15b in FIG. 19 transmits a signal at a timing slightly delayed from the CDMA base station 15a. Specifically, the pilot PN offset is provided for 64 chips (0.052 ms (milliseconds)).
Thus, even if there are a large number of CDMA base stations 15a, etc., each of the CDMA base stations 15a, etc. is provided with a different pilot PN offset by an integer multiple of 64 chips. Thus, it is possible to easily grasp whether a signal has been received.

Further, the signal transmitted from the CDMA base station 15a and the like includes a sync channel signal, which is the sync channel message in FIG. FIG. 20 is a schematic diagram showing the contents of the sync channel message.
As shown in FIG. 20, the sync channel message includes the pilot PN signal data described above, for example, data indicating that the pilot PN offset data is 64 chips (0.052 ms) × N (0 to 512). ing. This data is represented by “PILOT_PN” in FIG.
The sync channel message also includes system time data which is GPS time data.
The GPS time is displayed in seconds since 0:00 every Sunday, and returns to 0 at 0:00 on the next Sunday. And since the week number of GPS is attached | subjected about this one week, it has the structure by which the receiving side can acquire GPS time by acquiring the data of a week number and elapsed time (second). This data is represented by “SYS_TIME” in FIG.

The sync channel message also includes “leap second” data for conversion to the Universal Coordinated Time (UTC). This data is represented by “LP_SEC” in FIG.
The sync channel message includes a local offset time, which is time difference data for UTC in the country or region where the wristwatch 10 is located. That is, for example, in the case of Japan, data indicating that the time is 9 hours plus UTC is stored.
This data is represented by “LTM_OFF” in FIG.
The sync channel message also includes summer time data indicating whether or not the country or region where the wristwatch 10 is located adopts daylight saving time or the like. In Japan, since the daylight saving time system is not adopted, the data is “0”. This data is represented by “DAYLT” in FIG.

  As described above, the pilot PN signal data in FIG. 19 is an example of the mobile base station error time information of the signal transmitted from the mobile base station (for example, the CDMA base station 15a), and the local offset information is the local time. This is an example of local time conversion information to be converted. The summer time data is an example of seasonal time information converted into seasonal time.

The sync channel message in FIG. 20 includes data having the above contents. Specifically, each data is transmitted in time series. As shown in FIG. 19, the signal to be transmitted is transmitted in superframe units of 80 ms units, and the last superframe in FIG. 19 includes the last data of the sync channel message. In other words, the last timing of the last superframe in FIG. 19 (portions indicated by “E” and “EE” in FIG. 19) is the timing of completion of reception of the sync channel message.
Further, in the CDMA system, the above-described GPS time of the sync channel message in FIG. 20 is not the time in “E” in FIG. 19, and thereafter, the time after 4 superframes (320 ms), that is, FIG. The time is “F”.
Specifically, the pilot PN offset data described above is the time after four superframes from the last timing of the last superframe, with the time in the case of 0 chip (0 ms) as a reference.

This is based on the fact that CDMA is a system for communicating with a mobile phone in the first place. That is, after receiving the sync channel message shown in FIG. 20 from the CDMA base station 15a or the like, the mobile phone needs to make preparations for synchronous communication with the CDMA base station 15a or the like in the mobile phone.
Specifically, after preparing for the transition to the “standby state” which is the next stage, communication is performed in synchronization with the CDMA base station 15a and the like.
Therefore, in consideration of this preparation time, the CDMA base station 15a or the like transmits in advance a time after 320 ms, which is a future time, and the mobile phone that has received this time performs processing internally to prepare for it. After the end, it is configured that it becomes easier to synchronize with the CDMA base station 15a and the like at this time. In other words, these 4 superframes (320 ms) are the preparation time on the mobile phone side.

  Thus, the pilot PN signal is an example of code signal information, and the superframe (S) is an example of frame information.

  The above is the outline of the CDMA mobile phone system according to the present embodiment. Based on the above assumptions, the present embodiment will be described below.

Hereinafter, the operation of the wristwatch 10 according to the first embodiment will be described according to the flowcharts of FIGS. 7 to 10, and various programs and data of FIGS.
When the time of the wristwatch 10 is corrected, first, it is necessary to receive a pilot channel signal which is a signal transmitted from the CDMA base station 15a or the like in the area where the wristwatch 10 is located.
In this case, when the location area of the wristwatch 10 is not changed from the location area when the previous time correction was performed, for example, when there is no movement by the crown 28 of the wristwatch 10 as described later. Etc. can be set.
That is, the frequency scan method selection program 302 of FIG. 4 is started, the frequency scan method data 405a is read from the frequency scan method data storage unit 405 of the first various data storage unit 40 of FIG. The frequency scan method data 405a is displayed and shown to the user. The frequency scan method data 405a is composed of a plurality of data, and is data having different frequency scan methods. Here, the frequency scan method selection program 302 and the frequency scan method data 405a constitute an example of a frequency detection unit, and are input and specified via the crown 28 which is an example of an external input unit that can be operated by the user. This is an example of a configuration to detect.

Then, as shown in ST101 of FIG. 7, it is determined whether or not the user has selected and set one of the frequency scanning method data 405a shown on the display 14 by using the crown 28 of the wristwatch 10 or the like. . In this case, when the user selects and sets one from the frequency scan method data 405a, the signal is received from the CDMA base station in the area where the wristwatch 10 is located according to the outline flow of FIG. A fix has been made.
If one of the frequency scan method data 405a is not selected and set by the user, the frequency scan method selection program 302 is terminated, the process proceeds to ST102, and the frequency scan is started. That is, the receivable frequency scan program 301 is activated in FIG. The receivable frequency scan program 301 is an example of a frequency detector that detects the frequency of a CDMA base station signal emitted from a CDMA base station, which is an example of a mobile base station.

Next, the process proceeds to ST103, and it is determined whether or not the previous reception base station frequency data 502a is stored in the previous reception base station frequency data storage unit 502 of the second various data storage unit 50 of FIG. If the previous reception base station frequency data 502a is stored in the previous reception base station frequency data storage unit 502, the process proceeds to ST108 and the previous reception base station frequency data stored in the previous reception base station frequency data storage unit 502 The data 502a is stored as the extracted base station frequency data 505a of the extracted base station frequency data storage unit 505 of the second various data storage unit 50 of FIG. Then, the process proceeds to ST106 described later. Here, the previous reception base station frequency data 502a is an example of the previous reception base station frequency information.
As described above, by performing frequency scan using the previously received base station frequency data 502a, when receiving a signal transmitted from the CDMA base station 15a or the like, the reception probability increases, and the time correction is performed promptly. Yes. In addition, since necessary time correction information data can be obtained quickly, the power consumption of the wristwatch 10 is reduced.

If the previous reception base station frequency data 502a is not stored in the previous reception base station frequency data storage 502, the process proceeds to ST104. Specifically, in ST104, in order to receive a signal transmitted from the CDMA base station where the wristwatch 10 is located, the receivable frequency is scanned.
Therefore, the receivable frequency scan program 301 of FIG. 4 sets the base station frequency data table 401a of the reception frequency data storage unit 401 of the first various data storage unit 40 of FIG. 404 is stored as receivable frequency scan method data 404a. Here, the reception frequency data storage unit 401 is an example of a mobile base station frequency information storage unit, and the base station frequency data table 401a is an example of a plurality of types of mobile base station frequency information.

Subsequently, the process proceeds to ST105, and the first base station frequency data of the receivable frequency scan method data 404a is stored in the extracted base station frequency data storage unit 505 as the extracted base station frequency data 505a in FIG.
Here, the base station frequency data table 401a of the reception frequency data storage unit 401 has, for example, as shown in FIG. 13, the frequency band assigned to each BC as information corresponding to each BC. Yes.
As described above, if the base station frequency data table 401a is prepared in advance in the wristwatch 10, by scanning the frequency for each frequency band assigned to each BC, the location area of the wristwatch 10 is determined. BC corresponding to is known, which frequency band is used is immediately known, and power consumption can be reduced and time can be shortened. In other words, it is not necessary to scan all frequency bands including frequency bands that are not normally used.
In addition, if the frequency band being used is known, the BC is also found, so the target country or the like may be known. In other words, along with the BC and corresponding frequency band information, the data of the target country is also stored as information inside the wristwatch. If there is no other country using BC, the approximate location of the wristwatch 10 The area can also be known. For example, if the frequency of the frequency band 832 to 870M of BC3 can be scanned, it can be understood that the target country of BC3 is predicted as the location area of the wristwatch 10 and is Japan.

Next, the process proceeds to ST106, where the frequency of the CDMA base station signal of the CDMA base station is scanned based on the extracted base station frequency data 505a to recognize the RF reception power.
Specifically, the RF received power recognition program 310 in FIG. 4 scans the frequency of the CDMA base station signal of the CDMA base station based on the extracted base station frequency data 505a, recognizes the RF received power, and recognizes it. The received RF received power is stored in the RF received power data storage unit 410 as the RF received power data 410a in FIG.
Then, the process proceeds to ST107, and when the RF received power data 410a is equal to or higher than the threshold RF received power data 403a stored in the threshold RF received power data storage unit 403 in FIG. 5, it is determined that reception is possible. Specifically, the RF received power comparison program 311 in FIG. 4 is stored in the threshold RF received power data 403a stored in the threshold RF received power data storage unit 403 in FIG. 5 and the RF received power data storage unit 410. The received RF received power data 410a is compared to determine whether the received RF power data 410a is equal to or higher than the threshold RF received power data 403a.
That is, when it is determined that the RF received power data 410a is equal to or greater than the threshold RF received power data 403a, there is a CDMA base station that has the same frequency band as the extracted base station frequency data 505a set in the location area of the wristwatch 10. Because it will do.
More specifically, the RF received power data 410a and the threshold RF received power data 403a when scanning and receiving the frequency from the CDMA base station based on the extracted base station frequency data 505a are compared, and this threshold value is compared. It is determined whether or not this frequency is receivable depending on whether or not the RF received power data 403a or higher.

FIG. 17 illustrates the relationship between frequency and RF received power data.
In this way, it is determined that the RF reception power data at a certain frequency can be received when, for example, -100 dB or more is reached. That is, a threshold value of −100 dB is set in the threshold RF received power data 403a, and the RF received power data 410a recognized by scanning at a frequency based on the threshold RF received power data 403a and the extracted base station frequency data 505a. If the threshold RF received power data 403a is equal to or greater than the threshold RF received power data 403a, it is determined that reception is possible and the process proceeds to the next step. However, when the threshold RF received power data 403a is not satisfied, it is determined that the frequency of the CDMA base station signal from the CDMA base station in the area where the wristwatch 10 is located cannot be scanned with the frequency based on the extracted base station frequency data 505a. To do. Then, in ST109, the receivable frequency rewriting program 306 in FIG. 4 reads the next receivable frequency scan method data 404a from the receivable frequency scan method data storage unit 404, and the extracted base station frequency data storage unit 505 The extracted base station frequency data 505a is rewritten.
Then, the process returns to ST106 and operates in the same flow as described above, and is repeated until RF received power data 410a equal to or higher than the threshold RF received power data 403a is obtained.
The RF reception power recognition program 310 and the RF reception power comparison program 311 are an example and a part of the frequency detection unit.

If RF received power data 410a equal to or higher than the threshold RF received power data 403a is recognized, the process proceeds to ST110 in the schematic flow of FIG.
In ST110, the frequency corresponding to the RF received power data 410a recognized by the receivable frequency scan program 301 in FIG. 4 is set as the frequency at which the CDMA base station signal can be received from the CDMA base station in the area where the wristwatch 10 is located. The said frequency is memorize | stored as the receivable frequency data 501a of the receivable frequency data storage part 501 of FIG. Here, the receivable frequency data storage unit 501 is an example of a receivable frequency information storage unit, and the receivable frequency data 501a is an example of receivable frequency information.
Next, the process proceeds to ST111, where the base station reception date / time detection correspondence table creation program 312 in FIG. 4 recognizes the RF reception power data 410a in ST110 in FIG. 5 as the mobile base station signal reception date / time, and the RF reception power data. Receivable frequency data 501a stored in the receivable frequency data storage unit 501 in FIG. 6 which is a frequency when 410a is recognized is used as mobile base station signal received frequency data, and these data are associated with each other in FIG. The data is stored in the base station signal reception date / time / base station signal reception frequency data correspondence data 504a in the base station signal reception date / time data storage unit 504. The base station signal reception date / time / base station signal reception frequency data correspondence data 504a is an example of the mobile base station signal reception date / time and mobile base station frequency information, and the base station reception date / time detection correspondence table creation program 312 is a mobile base station signal reception date / time. It is an example of a date storage part.

Subsequently, the process proceeds to ST112, where the number of detections of the base station frequency data in the base station frequency data table corresponding to the receivable frequency data is counted, and the number of detections of the receivable base station frequency data / detection number correspondence data is N = 1. Remember as.
Specifically, the detection frequency data detection program 305 of FIG. 4 receives the base station signal reception data 504a stored as the base station signal reception date / time / base station signal reception frequency data correspondence data 504a of the base station signal reception date / time data storage unit 504. The number of detections of the receivable base station frequency data / detection number correspondence data 503a as the number of detections corresponding to the base station frequency data in the base station frequency data table 401a of FIG. 5 corresponding to the receivable frequency data 501a as the frequency data. Is stored as N = 1.
Here, N is count data, and increases every time base station frequency data is detected as a recognized frequency of RF received power data. That is, when the next base station frequency data is detected, the number of detections is N = 2 (= 1 + 1). Further, when detection is performed with the same base station frequency data, the number of detections is N = 3 (= 1 + 1 + 1). Thus, the number of times of detection increases each time the same base station frequency data is detected. Receivable base station frequency data / detection count correspondence data 503a is an example of frequency information and detection count information.

Then, the detection frequency / receivable frequency correspondence table creation program 307 of FIG. 4 executes the base station in order of decreasing detection frequency of the receivable base station frequency data / detection frequency correspondence data 503a stored by the detection frequency data detection program 305. The data is rearranged in correspondence with the base station frequency data in the frequency data table 401 a and stored in the receivable base station frequency data / detection count correspondence data storage unit 503.
That is, the receivable base station frequency data / detection frequency correspondence data 503a in the receivable base station frequency data / detection frequency correspondence data storage unit 503 by the detection frequency / receivable frequency correspondence table creation program 307 of FIG. As shown in FIG. 16, the BCs in the frequency band, which is the receivable base station frequency data, are stored in a priority order in the order of the relatively large number of successful receptions, which is the number of detections. The detection frequency data detection program 305 and the detection frequency / receivable frequency correspondence table creation program 307 are examples of the detection frequency information storage unit.

Next, the detection frequency / receivable frequency correspondence table creation program 307 is terminated, the process proceeds to ST113, the receivable frequency scan program 301 is terminated, and the frequency scan is terminated.
Then, the CDMA base station radio receiver 24 shown in FIG. 2 of the wristwatch 10 uses the pilot channel signal for the frequency corresponding to the receivable frequency data 501a when the RF received power data 410a is equal to or higher than the threshold RF received power data 403a. Take the synchronization.

When the process proceeds to ST114 and the time correction program 303 in FIG. 4 is started, the time is corrected according to a schematic flow in FIG. After performing time correction, in ST115, the receivable frequency data 501a of the receivable frequency data storage unit 501 is stored in the previous reception base station frequency data storage unit 502 as the previous reception base station frequency data 502a. Specifically, the previously received base station frequency data 501a stored in the receivable frequency data storage unit 501 in ST110 by the previously received base station frequency storage program 309 in FIG. 4 is used as the previously received base station frequency data 502a. Store in the storage unit 502. Here, the previous reception base station frequency storage program 309 is an example of the previous reception mobile base station frequency information storage unit.
Then, after the time is adjusted, the process proceeds to ST116, the set time is counted, and after the set time has elapsed, the process returns to ST101 in FIG. 7, and a frequency scan or the like is performed to correct the time. To go. Here, the set time is, for example, 24 hours, and a time interval that requires time correction can be arbitrarily set. The set time is counted by, for example, the real time clock 25 shown in FIG.

Here, before explaining the schematic flow of time correction in FIG. 10, the case where the user returns to ST101 in FIG. 7 and the user performs selection setting of the reception scan method will be described.
In ST101 of FIG. 7, when the user performs selection setting of the frequency scan method data 405a, the process proceeds to the schematic flow of FIG.
Proceeding to ST201 in FIG. 9, it is determined whether or not the user has selected base station signal reception date / time / base station signal frequency data correspondence data 504a. If selected, the process proceeds to ST202, and it is determined whether or not the update order of the base station signal reception date and time has been selected.
If it is selected, the process proceeds to ST203, and the update order of the base station signal reception date and time of the base station signal reception date and time data storage unit 504 is set as the scan order of the receivable frequency, and the receivable frequency scan method data 404a is set. The base station signal frequency data is stored in the receivable frequency scan method data storage unit 404 in the order of update of the base station signal reception date and time. Here, the base station signal reception date / time / base station signal frequency data correspondence data 504a in the base station signal reception date / time data storage unit 504 is stored as shown in FIG. 14 or FIG. ing.

The base station signal reception date / time / base station signal frequency data correspondence data 504a in the base station signal reception date / time data storage unit 504 is the order in which the RF reception power is recognized in ST111 described later, that is, the latest base station signal reception date / time. The base station signal frequency data is stored in the following order. Specifically, the reception frequency rank creation program 304 of FIG. 4 associates the base station signal frequency data with the above-mentioned latest base station signal reception date and time to receive the base station signal in the base station signal reception date and time data storage unit 504. The date / time / base station signal frequency data correspondence data 504a is stored.
Then, proceeding to ST204, base station frequency data corresponding to the latest base station signal reception date and time is stored in the extracted base station frequency data storage unit 505 of the extracted base station frequency data 505a.
Next, the process returns to ST106 in FIG. 7, and the frequency scan is continued according to the above-described flow. As described above, the receivable frequency scan program 301, which is an example of the frequency detection unit, performs frequency scanning in the order of base station signal reception date / time / base station signal frequency data correspondence data 504a in the latest base station signal reception date / time, that is, update order. When the user who is the user of the wristwatch 10 moves in the same route as the update order, the mobile base station from the CDMA base station 15a, which is an example of the mobile base station, in the order of the movement. A radio signal from the CDMA base station 15a, which is an example of the signal, can be received, and time correction can be performed automatically and promptly. In addition, since the probability of reception increases, power consumption can be reduced.

The base station signal reception date / time / base station signal frequency data correspondence data 504a in the base station signal reception date / time data storage unit 504 is, for example, as shown in FIG. 14 and FIG. 15, corresponding to the base station signal reception date / time. Stored as a table.
For example, in FIG. 15, the base station frequency data corresponding to the latest base station signal reception date and time is BC10. BC9, BC8, BC7, BC6... Are stored in order of new date and time from the top. In this case, BC3 is the oldest date.
Since BC is selected so as to be the most convenient frequency for each region (country), this update order is, for example, the frequency that can be scanned when the user moves each region. It is in order.
Here, in the example of FIG. 15, the region where the user is currently staying is assumed to be a region having a frequency corresponding to BC10. For example, the order in which the user moved several days ago from the current region is Assume that each region moves in reverse order. Then, the base station signal reception date / time / base station signal frequency data correspondence data 504a in the base station signal reception date / time data storage unit 504 is stored in the order of update, that is, the frequency in the order of BC10, BC9, BC8, etc. in FIG. If the scan order is set, the frequency can be scanned without waste, the CDMA base station signal from the CDMA base station 15a, etc. can be received quickly, the time can be corrected quickly, and the power consumption can be reduced. Less.
In addition, if the base station signal reception date / time / base station signal frequency data correspondence data 504a is stored in advance and the user can arbitrarily set the frequency scan, the frequency scan can be smoothly performed according to the movement of the user. There is no waste.

If the update order of the base station signal reception date / time is not selected in ST202 of FIG. 9, the process proceeds to ST208, and the base station signal reception date / time indicated by the user (also referred to as a user) on the display 14 of the wristwatch 10 is displayed. An arbitrary base station signal reception date / time is selected and set from the base station signal reception date / time / base station signal frequency data correspondence data 504a in the data storage unit 504. Then, the process proceeds to ST209, and the receivable frequencies in the order of the latest base station signal reception date and time stored in the base station signal reception date and time data storage unit 504 from the selected base station signal reception date and time (update order and reverse order). The base station frequency data corresponding to this base station signal reception date and time is stored in the receivable frequency scan method data storage unit 404 as receivable frequency scan method data 404a in order.
That is, in ST209, a user who is a user selects and sets an arbitrary base station signal reception date / time from the base station signal reception date / time / base station signal frequency data correspondence data 504a in the base station signal reception date / time data storage section 504.

  Then, the process proceeds to ST210, and the base station frequency data corresponding to the selected base station signal reception date and time is stored in the extracted base station frequency data storage unit 505 as the extracted base station frequency data 505a. Then, returning to ST106 in FIG. 7, the frequency scan is continued as described above, and the time is corrected.

When the base station signal reception date / time / base station signal frequency data correspondence data 504a is not selected in ST201 of FIG. 9, the process proceeds to ST205, and whether or not the receivable base station frequency data / detection count correspondence data 503a is selected. Determine whether. If it is not selected, the process returns to ST102 in the schematic flow of FIG. 7, and the frequency is scanned in the above order to correct the time.
If it is selected, the process proceeds to ST206, and the order in which the detection count of the receivable base station frequency data / detection count correspondence data storage unit 503 is relatively large is set as the scan order of the receivable frequencies. Specifically, as shown in FIG. 16, the number of detections / receivable frequency correspondence table creation program 307 stores the number of successful receptions, which is the number of detections for each BC, and sets a higher priority to a relatively larger one. Then, the data are rearranged in the descending order of priority, and stored as receivable base station frequency data / detection count correspondence data storage unit 503 as receivable base station frequency data / detection count correspondence data 503a. Then, the receivable frequency scan program 301, which is an example of the frequency detector, is set to perform frequency scans in the order of the receivable base station frequency data / detection count correspondence data 503a, and can be received as receivable frequency scan method data 404a. This is stored in the frequency scan method data storage unit 404.

Then, the process proceeds to ST207, and the receivable base station frequency data having a relatively high number of detections and having a high priority is stored in the extracted base station frequency data storage unit 505 as the extracted base station frequency data 505a. Then, returning to ST106 in FIG. 7, frequency scanning and time correction are performed. In this way, frequency scanning is performed in the order of the relatively large number of detections, which is an example of the detection number information, so that the reception probability when receiving a radio signal that is a CDMA base station signal from the CDMA base station 15a or the like is high, It is possible to receive promptly. Accordingly, the time can be corrected promptly and the time required for reception can be shortened. In other words, if the reception is performed in descending order, frequency scanning can be performed in the order of high reception probability, there is no waste during reception, power consumption can be reduced, and it can be performed in a short time.
As described above, the receivable frequency scan program, which is an example of the frequency detection unit, detects by the method selected by the user via the external input unit. Therefore, the frequency scan method selection program 302 can perform the frequency scan order in various orders, which is convenient for the user, and if it can be performed in the update order of the reception date and time, the probability of scanning the receivable frequency is increased. It is possible to improve reception time and power consumption. Therefore, frequency scanning can be performed in accordance with the user's behavior pattern, time correction can be performed reliably in a short time, and power consumption can be reduced.
Further, since the reverse setting of the update order is possible, the frequency scan can be performed in accordance with the movement of the user, and there is no waste.

Then, when the synchronization with the pilot channel signal is completed in ST113 of FIG. 8, the process proceeds to ST114, moves to a schematic flow of FIG. 10 showing the operation of the time correction program 303 of FIG.
Here, as shown in FIG. 21, the time correction program 303 has a plurality of programs for instructing some operations. FIG. 21 is a schematic diagram showing the time correction program 303 in FIG. As shown in FIG. 21, the time correction program 303 of FIG. 4 is described separately as a sync channel message reception program 313, a receiver control program 323, a primary local time calculation program 333, a final time calculation program 353, and the like. However, they are described separately for convenience of explanation, and may not actually be stored separately in this way.
That is, the process proceeds to ST114, and when the time correction is started, the process proceeds to ST211 in FIG. The sync channel message reception program 313 in FIG. 21 in the time correction program 303 switches to the sync channel and receives a CDMA base station signal sync channel message from the CDMA base station 15a or the like. Specifically, the sync channel message reception program 313 in FIG. 21 starts receiving sync channel messages as shown in FIG.

Then, the process proceeds to ST212, and it is determined whether or not the reception of the sync channel message is completed. If the reception of the sync channel message has not been completed, the process proceeds to ST218, where it is determined whether or not a timeout has occurred. If the timeout has occurred, the process returns to ST211 and starts from reception. On the other hand, if it is not a timeout, the process returns to ST212 again to check whether or not the process has been completed.
Next, when reception of the sync channel message is completed in ST212, the process proceeds to ST213, and the CDMA reception base station radio receiver 24 of FIG. 2 stops receiving radio signals from the CDMA base station 15a and the like.
Specifically, the receiver control program 323 in FIG. 21 operates, and the CDMA reception base station radio wave receiver 24 stops receiving radio wave signals that are CDMA base station signals from the CDMA base station 15a and the like. That is, the radio wave reception ends at the timing indicated by “E” or “EE”, which is the timing of the end of the last superframe in FIG.
The wristwatch 10 has received all the sync channel messages shown in FIG. 20, and the sync channel messages are stored in the sync channel message data storage unit 506 of FIG. 6 as sync channel message data 506a.

Next, the process proceeds to ST214. After ST214, the time is corrected based on the information of the sync channel message already acquired from the CDMA base station 15a or the like.
First, in ST214, when the location of the wristwatch 10 is, for example, Japan, the GPS time, leap second, and local offset time (in the case of Japan, 9 hours are added to UTC) from the sync channel message data 506a in FIG. , The daylight saving time is extracted (in the case of Japan, there is no daylight saving time, so 0 hour is added), the first local time calculation program 333 in FIG. 21 is started, and the first local time is, for example, first time Japan time Is calculated.
Specifically, UTC time is calculated based on leap second data based on GPS time, and based on this UTC time, for example, 9 hours is added as a local offset time to obtain Japan time. In Japan, since daylight saving time is not adopted, daylight saving time correction is not practically performed. In the case of a country adopting the daylight saving time system such as the United States, the correction of the daylight saving time is an extremely accurate time correction.

In this embodiment, the first Japan time is calculated, and this time becomes basic time data based on the GPS time.
The primary Japan time calculated in this way is stored as primary local time data 507a in the primary local time data storage unit 507 of FIG.

The first local time data 507a calculated here will be described. The first local time data 507a is as follows when described with reference to FIG. That is, if the wristwatch 10 receives the signal of the CDMA base station 15b of FIG. 19 and acquires the sync channel message, the received time (GPS time) is the above-described pilot PN offset data of 0 chip (0 ms). The time information is 4 superframes (320 ms) after the last timing of the last superframe with respect to the time of the case (the time at “F” in the example of FIG. 19).
However, since the pilot PN offset of the CDMA base station 15b in FIG. 19 is, for example, 64 chips (0.052 ms), the actual reception timing is different from the accurate GPS time accordingly. That is, “EE”, which is the timing at which the CDMA base station 15b of FIG. 19 actually receives the last superframe, is the time obtained by adding the pilot PN offset to the GPS time acquired by the wristwatch 10.

For this reason, the following processing is performed in the present embodiment. That is, in ST215, the following correction is applied to the primary local time data 507a in FIG. That is, by subtracting 320 ms (4 superframes) from the primary local time data 507a, the time at “F” in FIG. 19 becomes time information at “E”. Further, since the signal of the CDMA base station 15b has a pilot PN offset of 0.052 ms, the corresponding amount is added.
Then, for example, Japan time is generated based on the correct GPS time when the last superframe reception is completed (EE).
Such a calculation is performed by the secondary local time calculation program 343 in FIG. 21 based on the primary local time data 507a in FIG. 6, the differential time data 406a in FIG. 5, the pilot PN offset time data 407a, and the like. The result is stored in the secondary local time data storage unit 508 as the secondary local time data 508a of FIG.
An example of the difference time data 406 a in FIG. 5 is the above-described data of 320 ms (4 superframes), and is stored in the difference time data storage unit 406. An example of the pilot PN offset time data 407a is the above-described data of 64 chips (0.052 ms), which is stored in the pilot PN offset time data storage unit 407.

By the way, the second local time data 508a calculated in ST215 is a highly accurate time that matches the GPS time, but there are times required for ST214 and ST215. The time will be different (mad) by the calculation time.
Therefore, step ST216 is performed. That is, the final local time is calculated by adding the processing delay time to the second local time data 508a of FIG. That is, the processing delay time corresponds to the time required for the above-described calculation of the wristwatch 10, and the time is determined by the wristwatch 10.
For this reason, in this embodiment, as shown in FIG. 5, the processing delay time data 408a is stored in advance in the processing delay time data storage unit 408 as a fixed value. Then, the final local time calculation program 353 in FIG. 21 adds the processing delay time data 408a to the secondary local time data 508a in FIG. 6 to obtain final local time data 509a that is more accurate time information. Stored in the last local time data storage unit 509.

  The last local time data 509a generated in this way is extremely accurate time information that matches the GPS time. The processing delay time is an example of processing time information.

  Next, the process proceeds to ST217. In ST217, the RTC and time correction program 363 in FIG. 21 corrects the RTC 25 in FIG. 2, the hands 13 in FIG. 1, and the like based on the final local time data 509a in FIG. 6, and the time correction is completed.

As described above, the RTC and time correction program 363 is a part of the display time information correction program 303 for correcting the display time information (for example, the RTC 25 and the hands 13) of the time information display unit. is there.
The final local time calculation program 353 is also a part of the display time information correction program 303 that generates correction time information (for example, the final local time data 509a) for correction corrected by the RTC and the time correction program 363. It is an example of a time adjustment device.

As described above, according to the present embodiment, in ST104, ST108, ST203, ST209, ST206, etc., a CDMA base station is installed in each region (country) in the timekeeping apparatus provided with a time correction device such as a wristwatch 10 in advance. CDMA base station radio waves provided by the wristwatch 10 or the like with the CDMA base station signal from the CDMA base station 15a or the like corresponding to the location area of the wristwatch 10 using the data. Since the receiver 24 receives radio waves from the CDMA base station 15a and the like, useless time can be saved and power consumption is low.
In ST213, the CDMA receiving base station radio wave receiver 24 stops receiving radio waves from the CDMA base station 15a and the like, so that the power consumption of the battery 27 can be reduced.
Here, it demonstrates concretely using FIG. FIG. 19C shows a conventional power supply sequence in which a sync channel message is received from the CDMA base station 15b and then time synchronization is performed. As shown in FIG. 10, since the signal is received up to “FF” in FIG. 19, the power supply is in the ON state.
On the other hand, the power supply sequence of the present embodiment is (D) in FIG. As shown in (D), signal reception ends at “EE” in FIG. 19 and no communication is performed thereafter.
For this reason, since the wristwatch 10 of the present embodiment can reduce power consumption, it can be mounted on a device such as a watch that requires ultra-low power, and can perform time correction with extremely high accuracy. It has become.

  By the way, the process returns to ST115 and proceeds to ST116. In ST116, as described above, the time correction interval timer operates to count whether the set time has elapsed. Then, when the set time has elapsed, the process returns to ST101 again, and the processes after ST101 are executed as described above.

FIG. 10 shows a process in which the local offset time and summer time data in FIG. 20 are automatically corrected based on the sync channel message received from the CDMA base station 15a or the like. It may be possible.
In this case, the local offset time input using the crown 28 or the like of FIG. 1 is stored in the input local offset time data storage unit 510 as the input local offset time data 510a of FIG. Similarly, the input daylight saving time data is stored in the input daylight saving time data storage unit 511 as input daylight saving time data 511a. In this case, since the first local time is calculated based on the input data in the above-described ST214, the time can be corrected as desired by the user.
As described above, since the signal from the CDMA base station can be received using the frequency data stored in advance regardless of the area where the wristwatch 10 is located, the time can be quickly adjusted regardless of the area. Can do.
Also, it is possible to set the frequency scanning method according to the convenience of the user.
Therefore, the time can be shortened and the time can be corrected with low power consumption.

(Second Embodiment)
FIGS. 11 and 12 are schematic flowcharts showing main operations of the wristwatch with a time adjustment device according to the second embodiment of the present invention, and FIGS. 22 and 23 are with the time correction device according to the embodiment. It is a main schematic block diagram of a wristwatch.
Since many of the configurations of the wristwatch with a time adjustment device according to the present embodiment are the same as those of the wristwatch 10 of the first embodiment described above, the description of the common configurations is omitted as the same reference numerals, etc. The difference will be mainly described. Accordingly, the various data in the second various data storage unit 40 overlaps with the first embodiment, and the same data is used. 22 and 23, the various program storage units 30 and the first various data in the first embodiment are the same as the various programs and data in the various program storage units 60 and the first various data storage unit 70, respectively. The same code | symbol is attached | subjected to what overlaps with the various programs and each data in the memory | storage part 40. FIG. In addition, the schematic flowcharts of FIGS. 11 and 12 also show the schematic flowcharts centering on the operation of different parts.
In the first embodiment described above, when a radio signal that is a CDMA base station signal transmitted from the CDMA base station 15a or the like is received by the CDMA base station radio receiver 24, the CDMA base station in the area where the wristwatch is located. The frequency of the radio wave signal, which is the CDMA base station signal, was scanned and the RF received power was used to check whether it was equal to or higher than the threshold RF received power (ST106 and ST107 in FIG. 7).

In the second embodiment, a PN short code is generated instead of the RF received power, and the generated PN short code is compared with a radio signal from a CDMA base station to obtain a correlation value. .
Specifically, steps ST101 to ST105 in FIG. 11, and steps ST108 and ST109 are the same as those in the first embodiment described in the schematic flow of FIG. 12 until the time correction start process of ST114 is reached.

Here, ST112 and ST114 to ST116 of FIG. 12 are the same steps as ST112 and ST114 to ST116 described using the schematic flow of FIG. 8 in the first embodiment. The time correction process described in ST114 based on the schematic flow of FIG. 10 is also a common part in the second embodiment, and thus a duplicate description is omitted.
Then, instead of the threshold RF received power data 403a, the threshold RF received power data storage unit 403, the RF received power data 410a, and the RF received power data storage unit 410 of the first various data storage unit 40 of the first embodiment, In the second embodiment, the PN short code data 703a, the PN short code data storage unit 703, the correlation value data 710a, and the correlation value data storage unit 710 are used.
Accordingly, in the first embodiment, in place of the RF reception power program 310 and the RF reception power comparison program 311 stored in the various program storage units 30, the various program storage units 60 include a PN short code generation program. 610, a PN short code correlation value detection program 611 and a PN short code correlation value data comparison program 612 are stored.
Hereinafter, this difference will be mainly described with reference to the schematic flows of FIGS. 11 and 12.

In the schematic flow of FIG. 11, the process proceeds to ST306 through the process of ST105.
In step ST306, the PN short code corresponding to the extracted base station frequency data 505a in FIG. 6 is extracted from the PN short code data 703a in the PN short code data storage unit 703 in FIG.
Specifically, the PN short code generation program 610 in FIG. 22 refers to the extracted base station frequency data 505a stored in the extracted base station frequency data storage unit 505 in FIG. 6, and stores the PN short code data in FIG. The PN short code data 703a corresponding to the extracted base station frequency data 505a is selected from the unit 703, and the selected PN short code data is generated by a PN short code generator (not shown).

Then, the PN short code correlation value detection program 611 in FIG. 22 obtains the PN short code data generated by the wristwatch 10 and the PN short code when receiving the radio signal as the CDMA base station signal from the CDMA base station 15a and the like. The correlation value is detected by comparison.
Here, the correlation value is a value indicating how close the generated PN short code data is to the PN short code when received. Accordingly, if both PN short code data match, the correlation value is 1.

For more specific explanation, FIG. 18 shows an example of a correlation value between the generated PN short code and the received PN short code.
For example, if the correlation value at the base station is less than 0.1, the radio wave signal cannot be received from the base station with the frequency data corresponding to the PN short code. However, as shown in the figure, for example, in the case of the base station A, since the correlation value is 0.1 or more, the radio signal of the base station A can be received by the frequency corresponding to the generated PN short code. .

Thus, the frequency is scanned based on the PN short code so that the correlation value is 0.1 or more, that is, the radio signal as a CDMA base station signal from the CDMA base station 15a or the like can be received. I will do it.
As a threshold value indicating the degree of approximation between the PN short code received from the radio signal that is the CDMA base station signal from the CDMA base station 15a and the like and the generated PN short code, for example, 0.1 is set as shown in FIG. Is stored in the correlation value data storage unit 710 as the correlation value data 710a. In the correlation value data 710a, when a correlation value is detected, the CDMA base station radio receiver 24 in the wristwatch 10 receives a PN short of a radio signal that is a CDMA base station signal from the CDMA base station 15a or the like. Can receive code. That is, it is determined depending on whether or not the pilot channel (Walsh specific function) signal can be synchronized by mixing the pilot PN code which is a PN short code.

Next, in step ST308, it is confirmed whether the detected correlation value is correlation value data 710a or more. For example, it is determined whether the detected correlation value is 0.1 or more.
Specifically, the PN short code correlation value data comparison program 612 in FIG. 22 compares the detected correlation value with the correlation value data 710a stored in the correlation value data storage unit 710 in FIG. It is determined whether the data is 710a or more. If the correlation value is 0.1 or more, it is determined that reception is possible.
That is, when it is determined that the correlation value is equal to or higher than the correlation value data 710a, there is a CDMA base station having the same frequency band as the extracted base station frequency data 505a of FIG. Because it becomes.
More specifically, based on the extracted base station frequency data 505a, a PN short code generated from the PN short code data 703a in FIG. 23 and a PN short code of a radio wave signal that is a CDMA base station signal from the CDMA base station 15a, etc. When the correlation value is 0.1 or more, that is, the correlation value data 710a or more in FIG. 23, the frequency corresponding to the generated PN short code data is from the CDMA base station in the area where the wristwatch 10 is located. This is the frequency at which the CDMA base station signal can be received. Here, the PN short code generation program 610, the PN short code correlation value detection program 611, and the PN short code correlation value data comparison program 612 are an example and a part of the frequency detection unit.

  Then, the process proceeds to ST311 in FIG. 12, and the frequency data corresponding to the PN short code received when the correlation value is 0.1 or more is stored in the receivable frequency data storage unit as a receivable frequency. Specifically, ST311 determines the frequency corresponding to the PN short code for which the receivable frequency scan program 301 has a correlation value of 0.1 or more, from the CDMA base station signal from the CDMA base station in the area where the wristwatch 10 is located. Is stored as the receivable frequency data 501a of the receivable frequency data storage unit 501 in FIG.

  Next, the process proceeds to ST312, and the base station reception date / time detection correspondence table creation program 312 receives the PN short code whose correlation value is 0.1 or more as the base station signal reception date / time, and this correlation value is 0. Receivable frequency data 501a stored in the receivable frequency data storage unit 501 in FIG. 6, which is the frequency corresponding to the PN short code that is equal to or higher than 1., is used as base station signal reception frequency data, and these data are associated with each other. Then, the data is stored in the base station signal reception date / time / base station frequency data correspondence data 504a of the base station signal reception date / time data storage section 504 of FIG.

  Subsequently, the process proceeds to ST112, where the number of detections of the base station frequency data in the base station frequency data table corresponding to the receivable frequency data is counted, and the number of detections of the receivable base station frequency data / detection number correspondence data is N = 1. Remember as. This process is the same as that described in the first embodiment.

Next, in ST314, the receivable frequency scan program 301 is terminated, and the frequency scan is terminated. Then, the CDMA base station radio receiver 24 shown in FIG. 2 of the wristwatch 10 generates a PN short code when the correlation value is 0.1 or more, and among the radio waves transmitted from the CDMA base station 15a, In order to receive the pilot channel signal radio wave, the pilot channel is scanned to synchronize with the pilot channel and the signal from the CDMA base station 15a or the like.
Specifically, in order to synchronize with a superframe every 80 ms as shown in FIG. 19, the pilot PN synchronization program 308 of FIG. 4 is started, the signal radio wave is down-converted, and a baseband (not shown) The unit mixes a pilot PN code, which is a PN short code, with a pilot channel (Walsh specific function) signal to synchronize.

In step ST114, the time correction program 303 in FIG. The steps after ST114 are the same as those in the first embodiment.
As described above, according to the present invention, the signal from the CDMA base station can be received by using the frequency data stored in the inside in advance regardless of the area where the wristwatch 10 is located. The time can be automatically adjusted.
Furthermore, it is possible to set a frequency scanning method according to the convenience of the user. Further, the time can be shortened and the time can be corrected with low power consumption.

  The present invention is not limited to the above-described embodiment.

It is the schematic which shows the wristwatch with a time adjustment apparatus which is the time measuring apparatus with a time adjustment apparatus which concerns on this invention, for example. It is the schematic which shows the main hardware constitutions etc. inside the wristwatch of FIG. It is a schematic whole figure showing main software composition etc. of a wristwatch. It is the schematic which shows the data in the various program storage part of FIG. It is the schematic which shows the data in the 1st various data storage part of FIG. It is the schematic which shows the data in the 2nd various data storage part of FIG. It is a schematic flowchart which shows the main operation | movement etc. of the wristwatch concerning this Embodiment. It is another schematic flowchart which shows the main operation | movement etc. of the wristwatch concerning this Embodiment. It is another schematic flowchart which shows the main operation | movement etc. of the wristwatch concerning this Embodiment. It is another schematic flowchart which shows the main operation | movement etc. of the wristwatch concerning this Embodiment. It is a schematic flowchart which shows the main operation | movement of the wristwatch with a time adjustment apparatus concerning 2nd Embodiment of this invention. It is a schematic flowchart which shows the main operation | movement of the wristwatch with a time adjustment apparatus concerning 2nd Embodiment of this invention. It is an example of the data table which shows the relationship between the band class concerning this Embodiment, frequency pair, etc. It is an example of the data table which shows the relationship between the band class concerning this Embodiment, frequency pair, etc. It is an example of the data table which shows the relationship between the band class concerning this Embodiment, frequency pair, etc. It is an example of the data table which shows the relationship between the band class concerning this Embodiment, frequency pair, etc. It is the schematic which shows an example of the method of the frequency scan concerning this Embodiment. It is the schematic which shows an example of the method of the frequency scan concerning this Embodiment. It is the schematic which shows the synchronous timing etc. of the signal transmitted from a CDMA base station. It is the schematic which shows the content of a sync channel message. It is the schematic which shows the data in the time correction program of FIG. It is the schematic which shows the data in the various program storage part of FIG. 3 concerning 2nd Embodiment of this invention. It is the schematic which shows the data in the 1st various data storage part of FIG. 3 concerning 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Wristwatch with time correction device, 12 ... Dial, 15a and 15b ... CDMA base station, 24 ... CDMA base station radio receiver, 25 ... Real time clock (RTC), 27 ..Battery 301 ... Receivable frequency scan program 302 ... Frequency scan method selection program 303 ... Time correction program 304 ... Reception frequency ranking table creation program 305 ... Detection frequency data Detection program, 306 ... Receivable frequency rewriting program, 307 ... Detection frequency / receivable frequency correspondence table creation program, 309 ... Previous reception base station frequency storage program, 310 ... RF received power recognition program, 311 ... RF received power comparison program, 312 ... Base station reception date / time detection correspondence table creation program 401, reception frequency data storage unit, 401a, base station frequency data table, 403a, threshold RF received power data, 404a, receivable frequency scan method data, 405a, frequency scan method. Data: 410a: RF received power data, 501a: Receivable frequency data, 502a: Previously received base station frequency data, 503a: Receivable base station frequency data / detection count correspondence data, 504a,. Base station signal reception date / time / Base station signal reception frequency data correspondence data, 505a... Extracted base station frequency data, 610... PN short code generation program, 611.・ PN short code correlation value data comparison program, 703a ... PN show Tocoat data, 710a ... correlation value data

Claims (8)

A mobile base station signal including time information transmitted from a mobile base station is received in a CDMA (Code Division Multiple Access) mobile phone communication network, and based on the mobile base station signal, a time display unit A time correction device for correcting display time information,
A frequency detector for detecting a frequency of the mobile base station signal emitted by the mobile base station;
A mobile base station frequency information storage unit that stores a plurality of types of mobile base station frequency information related to the mobile base station signal transmitted from the mobile base station,
The frequency detector
Detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the mobile base station frequency information of the plurality of types stored in the mobile base station frequency information storage unit; When the frequency of the mobile base station signal corresponding to the mobile base station frequency information is detected, the mobile base station is identified from the frequency, and the frequency of the mobile base station signal is received as receivable frequency information. Store in the possible frequency information storage unit, receive the mobile base station signal, perform time correction based on the time information included in the mobile base station signal,
A time correction apparatus characterized in that the time is corrected by a pilot PN offset transmitted at a different timing for each mobile base station .   The time correction apparatus according to claim 1, wherein the plurality of types of mobile base station frequency information are stored for each band class. A number-of-detection-information storage unit that counts the number of times stored in the receivable frequency information storage unit as the receivable frequency information among the plurality of types of mobile base station frequency information and stores it as detection number information,
The detection frequency information storage unit is configured to store the detection frequency information in association with the plurality of types of mobile base station frequency information,
The frequency detector
Of the detection count information corresponding to the plurality of types of mobile base station frequency information, the mobile counts in the order of the plurality of types of mobile base station frequency information corresponding to the detection count information with relatively large detection count information. The frequency of the mobile base station signal transmitted from the base station is detected and detected until the frequency of the mobile base station signal is stored as the receivable frequency in the receivable frequency information storage unit. The time correction apparatus according to claim 1 or 2, wherein the time correction apparatus is provided. Having a previous reception mobile base station frequency information storage unit that stores the receivable frequency information stored in the receivable frequency information storage unit as previous reception mobile base station frequency information;
The frequency detector
A configuration for detecting the frequency of the mobile base station signal using the previous received mobile base station frequency information and detecting the mobile base station signal upon detection after storing the previous received mobile base station frequency information; The time correction device according to claim 1, wherein the time correction device is configured. The mobile base station signal reception date and time when the frequency of the mobile base station signal stored in the receivable frequency storage unit as the receivable frequency information is detected, and the frequency corresponding to the frequency corresponding to the mobile base station signal It has a mobile base station signal reception date storage unit that stores mobile base station frequency information correspondingly,
The mobile base station signal reception date storage unit has a configuration to memorize and said mobile base station signal reception date and the mobile base station frequency information in the order in which the cellular base station signal reception date is updated,
The frequency detector
Detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the mobile base station frequency information in the order of the mobile base station signal reception date storage unit or in the reverse order of the order. 5. The configuration according to claim 1, wherein the mobile base station signal is received until the receivable information is stored in the receivable information storage unit. The time correction device described in 1.   6. The frequency detection unit according to claim 1, wherein the frequency detection unit is configured to input, specify, and detect through an external input unit operable by a user. Time correction device. A mobile base station signal including time information transmitted from a mobile base station is received in a CDMA (Code Division Multiple Access) mobile phone communication network, and based on the mobile base station signal, a time display unit A timing device with a time correction device for correcting the display time information,
A frequency detector for detecting a frequency of the mobile base station signal emitted by the mobile base station;
A mobile base station frequency information storage unit that stores a plurality of types of mobile base station frequency information related to the mobile base station signal transmitted from the mobile base station,
The frequency detector
Detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the mobile base station frequency information of the plurality of types stored in the mobile base station frequency information storage unit; When the frequency of the mobile base station signal corresponding to the mobile base station frequency information is detected, the mobile base station is identified from the frequency, and the frequency of the mobile base station signal is received as receivable frequency information. Store in the possible frequency information storage unit, receive the mobile base station signal, correct the time based on the time information included in the mobile base station signal, and transmit at a different timing for each mobile base station A timekeeping device with a time adjustment device, which is configured to correct the time by the pilot PN offset . A mobile base station signal including time information transmitted from a mobile base station is received in a CDMA (Code Division Multiple Access) mobile phone communication network, and based on the mobile base station signal, a time display unit A time correction method for correcting display time information,
A frequency detection step that is a step of detecting a frequency of the mobile base station signal emitted by the mobile base station;
A mobile base station frequency information storage unit that stores a plurality of types of mobile base station frequency information related to the mobile base station signal transmitted from the mobile base station,
The frequency detection step includes
Detecting the frequency of the mobile base station signal transmitted from the mobile base station based on the mobile base station frequency information of the plurality of types stored in the mobile base station frequency information storage unit; When the frequency of the mobile base station signal corresponding to the mobile base station frequency information is detected, the mobile base station is identified from the frequency, and the frequency of the mobile base station signal is received as receivable frequency information. Store in the possible frequency information storage unit, receive the mobile base station signal, correct the time based on the time information included in the mobile base station signal, and transmit at a different timing for each mobile base station A time correction method characterized in that it is a step of performing time correction for the pilot PN offset .

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