JP3100940B2 - Alarm method by portable device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an alarm method executed by a portable device in a system for wirelessly connecting a base station and a portable device or between a portable device and a portable device.

[0002]

2. Description of the Related Art Cellular phones, PHS (Perso
In a system such as a nal handy phone, a plurality of base stations (CS) capable of providing services in a limited area are geographically dispersed and arranged. A terminal carried by the user, that is, a portable device (PS) is wirelessly connected to the CS. For example, in a public PHS, when a wireless call is issued from a PHS terminal serving as a PS, the call is received by a CS provided in the street or at home, and the call is connected to various telephone-related devices via a telephone line. Is done. Alternatively, a call originated wirelessly from a PHS terminal is received by another PHS terminal. Therefore, the user of the PHS terminal can make a telephone call anywhere while moving within the area covered by any CS, and can use the PHS terminal with a home cordless telephone. As a slave unit or as a transceiver
Can be used.

In the PHS, each CS transmits its own base station identification code (CS-ID) to the surroundings. When the PHS terminal is not performing communication, that is, even when it is not wirelessly connected to CS or another PHS terminal, whether or not it can receive the CS-ID intermittently at a predetermined cycle,
Also, it monitors the level at which it can be received, thereby detecting the nearest CS (intermittent reception of CS-ID). As described above, the PHS terminal conventionally has the CS-ID
Since the function of monitoring the reception status of the PHS terminal is provided, it is possible to use this to issue an alarm to the user of the PHS terminal. The PHS terminal described in Japanese Patent Application Laid-Open No. 9-224282 seems to embody this idea. That is, the PHS terminal disclosed in this publication checks the reception status of the CS-ID at the current location in response to the user performing an alarm location registration operation, and thereby determines the nearest (ie, the CS-ID).
(The highest reception level) is detected and its CS-I
D within it, and then the registered CS-
When the ID can be received at a sufficient level,
An alarm is issued to inform the user that the user has arrived at the alarm point. Therefore, if the PHS terminal according to this publication is used, it is possible to reduce overtaking of trains and the like. Specifically, for example, if you perform an alarm point registration operation near the ticket gate of the nearest station at home when you go to work, an alarm will be issued when the train approaches the nearest station at home when you leave work, so you will reduce overtime Will.

[0004] However, the alarm method described in the above publication has several problems. For example, the area covered by CS is a radius of 5 in the case of a public PHS as an example.
Since it extends for about 00 m, an alarm is issued considerably before the alarm point.

[0005]

SUMMARY OF THE INVENTION One of the objects of the present invention is that the area covered by the CS has a certain extent, so that using the alarm method described in the above-mentioned publication, the alarm is located well before the alarm point. An object of the present invention is to enable an alarm to be generated only at an alarm point and its immediate vicinity in a system in which the alarm is issued. One of the objects of the present invention is not only the arrival at the alarm point, but also various situations such as arrival near the alarm point, approach to the alarm point, departure from the alarm point, and escape from around the alarm point. It is an object of the present invention to provide an alarm corresponding to a situation. In the present invention, by examining the reception status of CS-ID, generally examining a plurality of CSs that can receive the CS-ID at a predetermined level or more at the current location, and registering and comparing the list or set, We have achieved these objectives. The present invention is, so to speak, a PHS in which several or more CSs are provided around a point where there are many users, for example, around a station, and this point is overlapped with these CSs to substantially increase the number of radio lines. It focuses on the actual state of operation and utilizes it (however, the application of the present invention is not limited to PHS).

[0006] An alarm method according to the present invention is connected to a plurality of CSs which are geographically dispersed to cooperatively cover an area to be provided with a service, and to a CS or another PS by radio. This is executed by a PS in a mobile communication system having a PS that performs communication. In addition, in order to execute the alarm method according to the present invention, the PS-CS-ID
There must be a function to check the reception status of That is, in the present invention, each CS uses a C
When the S-ID is wirelessly transmitted to the surroundings,
CS-ID from surrounding CS when not communicating
Is presumed to have a function of intermittently receiving and checking the reception status.

In the present invention, a registration procedure and an alarm procedure are executed by the PS. In the registration procedure, P
In response to a command to register the current point of S as an alarm point, the CS-ID of the CS that is currently transmitting a CS-ID that can be received in a reception state equal to or higher than a predetermined registration criterion.
The ID is registered in the PS (for example, a writable nonvolatile memory). In order to limit or save storage capacity, the number of CS-IDs that can be registered is limited to an upper limit by a predetermined maximum CS registration number. Therefore, by executing the registration procedure, the CS-ID of the CS that provides a relatively good reception state at the alarm point is registered in the PS, up to the maximum number of registered CSs, generally for a plurality of CSs. Is done.

When executing the alarm procedure, the first CS group, which is a set of CSs transmitting CS-IDs that can be received in a reception state that is equal to or higher than a predetermined detection criterion, is registered in the registration procedure. The second set of CSs related to the CS-ID
Are compared based on the CS-ID. Furthermore,
Various alarms are selectively generated based on the result. For example, when the number of CSs belonging to both the first and second CS groups is equal to or greater than a predetermined alarm reference number, an alarm indicating arrival at an alarm point is issued. If the number of CSs belonging to both the first and second CS groups is less than the alarm reference number and equal to or greater than the predetermined spare alarm reference number, an alarm indicating arrival near the alarm point is issued. . Further, the first and second CSs
When the number of CSs belonging to both groups increases from the number below the predetermined number of approach alarms that is equal to or less than the alarm reference number to the number equal to or more than the number of approach alarms, it is approaching the alarm point. An alarm is issued to indicate that Further, when the number of CSs belonging to both the first and second CS groups is reduced from a number equal to or more than a predetermined departure alarm reference number which is equal to or less than the alarm reference number to a number less than the departure alarm reference number, , An alarm indicating departure from the alarm point is issued. Further, when the number of CSs belonging to both the first and second CS groups increases from a number below the alarm reference number to a number equal to or greater than the alarm reference number and then decreases to a number below the alarm reference number again. Is issued an alarm indicating escape from the alarm point.

As described above, according to the present invention, when a command for registering an alarm point is given to a PS, a plurality of CSs that can receive the CS-ID at the current point in a reception state higher than the registration criterion are generally provided. Is CS-I
It is registered in the PS in the form of a combination of D. In other words, an overlapping area covered by a plurality of CSs is registered as an alarm point. In the alarm procedure, a combination of a plurality of CSs that can receive the CS-ID at the current location in a reception state equal to or higher than the detection criterion is compared with a registered combination of a plurality of CSs. An alarm is issued accordingly. Therefore, according to the present invention, in a system in which a plurality of CSs overlap an area having a spread that cannot be ignored, an arrival alarm can be issued only in the vicinity of an alarm point related to registration. P described in
An alarm can be issued more accurately than S. Further, in the alarm procedure, since information on the CS-ID reception status and its history can be created and used for a plurality of CSs, various types of alarms such as arrival, reserve, approach, departure, and exit can be issued. it can. For example, in the case where both arrival and standby alarms are issued, a preliminary alarm is issued at a point shortly before arrival at the platform (alarm point) at the station where the train gets off, so that overtaking is further reduced. Also, when a departure alarm or an escape alarm is set using a means of transmitting information to another communication device as an alarm means, for example, whether the child has certainly arrived at the station and boarded the train ("departure"), A guardian at home or the like can accurately know whether or not he has left school ("escape").

A plurality of alarm points can be set. That is, if the command for registering the current point of the PS as an alarm point includes information for identifying the alarm point (for example, the user selects the number of the alarm point on the screen of the PS and registers the information. Operation), this information is also registered when executing the registration procedure, and this information is used when executing the alarm procedure, so that a plurality of alarm points, for example, a train The originating station and the arriving station can be registered in the PS, and an alarm can be issued for each alarm point. Further, the user may be allowed to select an alarm point at which an alarm should be issued from among the plurality of registered alarm points. In other words, if the execution of the alarm procedure is prohibited except for the alarm point selected by the user among the registered alarm points, for example, both the nearest station at home and the nearest station at work are set as alarm points. In advance, an alarm can be generated only at the station closest to the office when going to work, and only at the station closest to the home when leaving work.

When executing a registration procedure or an alarm procedure, it is necessary to check the reception status of the CS-ID at the current location of the PS. This CS search process in the registration procedure may be performed in response to a command to register the current location of the PS as an alarm location,
When the command is issued, the PS may be omitted by using the result of the CS search processing by intermittent reception that has already been performed by the PS. CS in alarm procedure
The search process may be omitted using the result of the CS search process by intermittent reception of the PS already executed, or may be executed periodically. The frequency of CS search can be reduced by using the result of intermittent reception, but more accurate registration and alarm can be performed by performing CS search according to the command (registration procedure) or periodically (alarm procedure) become. Further, when the CS search processing in the alarm procedure is periodically executed, it is desirable that the execution cycle be longer than the intermittent reception cycle. By doing so, power consumption can be suppressed as compared with the case where intermittent reception is performed at the same frequency.

Immediately after executing the registration procedure, the PS is at or near the alarm point just registered. Therefore, in order to prevent an alarm from being issued in this situation, the execution of the alarm procedure is prohibited until a predetermined time elapses after the execution of the registration procedure or until there is a command regarding the alarm from the user. It is desirable to make. Furthermore, when the registration procedure is executed, there may be cases where only CSs less than the alarm reference number can be detected and registered. Therefore, the CS-
If the number of IDs is less than the alarm reference number, it is preferable to use the number of registered CS-IDs in the alarm procedure instead of the alarm reference number. Furthermore, when the registration procedure is performed, there may be no CS related to the reception state that exceeds the registration criterion, and such a situation should be notified to the user. Therefore, preferably, when performing the registration procedure, if there is no CS transmitting a CS-ID that can be received in a reception state equal to or higher than the registration criterion, the user is informed that registration was not possible. To do it. Further, by setting the registration criterion higher than the detection criterion, hysteresis can be provided and an alarm can be generated more reliably.

As means for issuing an alarm,
A member that emits vibration, sound, or light to draw the user's (former's) attention, a member that displays characters or symbols indicating the name of the alarm point to notify the user, and other communication devices (for example, protection) Various members can be selectively used, such as a member for transmitting information to a PS carried by the user.
In particular, note that the person receiving the alarm is not limited to the PS carrier.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. In the following description, a case where the PHS terminal is used in the public mode is taken as an example, but the present invention can be applied to a self-service mode, an auto mode, and the like. Also,
Even in a system other than the PHS, a system that involves handover between a large number of CSs that are geographically dispersed, that is, a system in which the coverage area of one CS and another CS overlaps Then, the present invention can be applied. Further, in the above description, the present invention is described as the invention of the "alarm method".
It can also be expressed as "portable device".

[0015]

FIG. 1 shows a functional configuration of a PHS terminal according to an embodiment of the present invention. In the figure, reference numeral 10 denotes an operation unit composed of numeric keys and the like, reference numerals 12 and 14 denote transmitters and receivers,
Reference numeral 16 denotes a display unit composed of an LCD or the like, and reference numeral 18 denotes an alarm unit for generating vibration, sound, light, character symbol display, a radio signal, and the like. Forms an interface to the user. In particular, the alarm unit 18 includes a member that emits vibration, sound, or light that draws the user's attention, a member that displays a character or a symbol that informs the user of the name of the alarm point, and information to other communication devices. Is realized by a member or the like that transmits

The radio unit 20 is a circuit for transmitting and receiving signals to and from a CS or another PS using the antenna 22. The signal processing control unit 24 performs transmission and reception with a focus on baseband processing. The processing of the signal and the various parts of the PHS terminal are executed in response to a command from the operation unit 10 or the like. The signal processing control unit 24 can be configured by one or more integrated circuits. The memory 26 is a memory used by the signal processing control unit 24, and includes an E ² PROM or the like for registering the received CS-ID. The clock generator 28 gives the signal processing controller 24 and the like basic timings for the operation.

The signal processing control section 24 executes various kinds of processing in parallel (or in a manner similar to this). In FIG. 1, three blocks drawn inside the signal processing control unit 24, that is, the CS search unit 30, the CS registration unit 32, and the alarm control unit 34 are among various functions provided by the signal processing control unit 24. Represents a portion related to the feature of the present embodiment, that is, a function related to generation of an alarm, and is realized by hardware or software.

FIGS. 2 to 4 show the outline of the operations of the CS search unit 30, the CS registration unit 32, and the alarm control unit 34.
First, as shown in FIG. 2, when the user instructs to register an alarm point by pressing a predetermined function key on the operation unit 10 or the like (100), the CS registration unit 32 activates the CS search unit 30 to activate the CS search unit 30. , And issues a CS search (102).
When started (CS 300 in FIG. 4), CS search section 30 executes a CS search accordingly (302), and stores the obtained CS-ID and its reception level in CS registration section 32.
(304). The CS registration unit 32 inputs this (FIG. 2: 104), writes the input CS-ID and its reception level in the memory 26 (for example, an E ² PROM therein) (106), and writes or registers. Is displayed on the screen of the display unit 16 (108). Where C
When the CS that satisfies the registration condition cannot be found by the S search unit 30 (110), the fact that the registration is unsuccessful is displayed on the screen of the display unit 16 (108).

As shown in FIG. 3, the alarm control unit 32 counts whether or not the intermittent reception cycle T has elapsed (200), and every time the cycle T elapses, the signal processing control unit 24, as shown in FIG.
(Step 202). That is, as shown in FIG. 5, the PHS terminal performs the receiving operation intermittently at every predetermined period T even when there is no telephone call, and the PHS terminal existing in the vicinity
Processing such as reception of the CS-ID of S and detection of the reception level is performed. The alarm control unit 32 sets the CS search unit 3 every time the intermittent reception cycle T arrives N times (204).
0 performs a CS search (206). N is 2
The reason why the CS search is performed once every N cycles, which is a natural number as described above, is to suppress the frequency of performing the CS search and reduce power consumption. When the CS search unit 30 performs a CS search in response to a command from the alarm control unit 32 and finds that a predetermined alarm condition is satisfied (208),
The alarm control unit 34 instructs the alarm unit 18 to issue an alarm (210). In response, the alarm unit 18 issues an alarm.

Further, the CS search unit 30 includes a CS registration unit 3
When running a CS search in response to a command from the 2 (306), a determination level to P _1, also the search time T ₁
(308), and when the CS search is executed in response to a command from the alarm control unit 34, (30)
6) The judgment level is set to P ₂ and the search time is set to T ₂ (310). The CS search performed by the CS search unit 30 performs a reception operation for the search time set in step 308 or 310, and in the meantime, a CS that can continuously receive the CS-ID at a reception level equal to or higher than the determination level. Is a process of detecting the CS-ID and its reception level. Therefore, what is registered at step 106, its reception level as CS-ID which can continue to receive between determination level P ₁ or more reception levels of search time T _1. If the location where the registration operation is performed is a location that is covered by a plurality of CSs, a plurality of CS-IDs and their reception levels are registered. Similarly, a CS-ID and the received level can continue to receive the decision level P ₂ or more reception levels between the search time T ₂ are those obtained in the step 206, the current location is a plurality of CS If the point is covered, a plurality of CS-IDs and their reception levels are obtained.

In step 208, generally, a plurality of sets of registered CS-IDs and reception levels,
In general, it is determined whether or not a plurality of sets of CS-IDs and reception levels obtained at 6 satisfy predetermined alarm conditions. One feature of this embodiment is thus, a set of CS according to the registration, to compare and contrast the set of CS obtained by the search at a period of T ₂ of the in Figure 5, both the relationship By issuing an alarm in response, an alarm can be issued accurately and precisely in a narrower range than before, and a wider variety of alarms can be issued than before.

The first example of the alarm condition is the C
When a set of obtained CS by the search match perfectly during the period of the set and T ₂ of the S, it is an example of an alarm. The second example is emitted when a CS to a set of CS obtained by the search in the period of the set and T ₂ of the CS according to the registration partially match and matching more than a predetermined number, an alarm Example It is. These examples show the registered C
By matching the CS-ID obtained by the search in the S-ID and T _2, it can be realized. The third example is an example in which a condition relating to the order of the reception level is further added to the first or second example. That is, a set of CSs related to registration and T ₂
Period at the CS belonging to the intersection of the set of CS obtained by the search, whereas in order by the reception level at the time of registration, the ordered of the reception level in the search for a period of T ₂ are on the other hand, each CS of In this example, an alarm is issued if the order matches each other.

The first to third examples are examples in which an alarm is issued when the vehicle arrives at an alarm point, that is, examples of alarm conditions when an arrival alarm is issued. As shown in FIG. 6, first, when the carrier gives a command related to registration of an alarm point from the operation unit 10 at the point X ₀ ,
A CS search with a search time = T ₁ and a judgment level = P ₁ is performed. CS1 of this point X ₀ is in three of CS (Figure, CS
2 and CS3), if they belong to the area covered by CS, CS1, CS2 and CS3
-The ID and its reception level will be registered. That is, the point X ₀ is registered as an alarm point. When the user leaves the point X ₀ and returns again (for example, when he goes out of the train and goes back),
When the vehicle arrives near the point X ₀ , the result of the CS search with the search time = T ₂ and the determination level = P ₂ satisfies the alarm condition, and an alarm is issued. That is, CS
1, since the alarm is issued at the time A ₀ which enters the narrow area covered by overlapping with CS2 and CS3,
The PHS terminal carrier can receive an alarm more accurately than before. Further, by setting P ₁ > P ₂ , that is, by providing a hysteresis characteristic, as shown in FIG. 6, the area in which the alarm is generated can be made wider, and the alarm can be generated more reliably. Can be.

As a fourth example of the alarm condition, first to
There is an example in which a preliminary alarm is issued when the alarm condition according to the third example is partially satisfied. For example, in the first to third examples, the alarm area A _{0 in} FIG.
No alarm is issued if the vehicle does not enter the area, but in the fourth example, when the vehicle enters the overlapping range of two of the areas A ₁ , A ₂ and A ₃ covered by CS 1, CS 2 and CS ₃ (point X even when it passed through the ₁ and the point X ₃₎ or upon entering into one range (when passing the point X ₂ and the point X ₄₎ alarm is issued, when subsequently entering the alarm area a ₀ (Preferably in a form different from the preliminary alarm). Whether it is emitted preliminary alarm, CS belonging to the intersection of the set of obtained CS by the search for a set and T ₂ of the CS that are registered
May be determined depending on whether or not the number is equal to or more than a predetermined number. The determination threshold value at that time is set to be smaller than the determination threshold value (the number of registered CSs in the first example, a constant in the second example) when determining whether or not an arrival alarm should be issued. In this way, if a preliminary alarm is issued, for example, a preliminary alarm is received when the vehicle is about to arrive at the station, and an arrival alarm is received when the vehicle actually arrives at the station platform. This is convenient for the user.

As a fifth example of the alarm condition, a set of registered CSs and a CS obtained by a search in T ₂ are set.
Issue an approach alarm when the number of CSs belonging to the common part with the set gradually increases and exceeds a certain threshold.
There is a condition. As a sixth example, conversely, when the number of CSs belonging to the intersection of the set of registered CSs and the set of CSs obtained by the search in T ₂ gradually falls below a certain threshold value A departure alarm is issued. By doing so, it is convenient for the wearer because it is possible to know whether the vehicle is approaching the alarm point or moving away from the alarm point. In addition, these examples are also useful when it is desired to know the behavior and behavior of the carrier from a remote place. That is, the alarm unit 1
When a device that issues an alarm by wireless transmission as 8 is used, a guardian who is remotely located can obtain information such as whether or not a carrier, for example, a child has correctly got on a train.
The threshold used for determining whether to issue an approach alarm or a departure alarm is equal to or less than the threshold used for determining whether to issue an arrival alarm.

As a seventh example of the alarm condition, a set of registered CSs and a CS obtained by a search in T ₂ are set.
After the number of CSs belonging to the common part with the set increases from the number below the threshold value for determining whether an arrival alarm should be issued to the number equal to or more than this threshold value, the threshold value is again raised. This is an example of issuing an escape alarm indicating escape from an alarm point when the number of pieces falls below the number. This example is useful when it is desired to know the behavior of the carrier from a remote place. That is, when an alarm unit that issues an alarm by wireless transmission is used as the alarm unit 18, a guardian who is remotely located can obtain information such as whether or not a carrier, for example, a child has gone out of school.

In the present embodiment, a plurality of alarm points can be set. That is, if information for identifying the alarm point is given together with the registration operation (for example, if any alarm point number is selected and registered on the screen of the display unit 16), It is possible to determine whether or not an alarm is present at each alarm point, and issue an alarm as appropriate. Also, when a plurality of alarm points are set, an instruction to select an alarm point to actually generate an alarm is received and specified by a command from a carrier via the operation unit 10, and alarm conditions are set for other alarm points. May not be determined.

The number of CS-IDs that can be registered is limited in terms of the capacity of the memory 26 and the like, and a predetermined maximum registered number is the upper limit of the number of registered CS-IDs. Therefore, the threshold value used in determining whether or not an arrival alarm has occurred must be equal to or less than the maximum registration number. However, even in such a case, a problem may occur. For example, a situation may occur in which the number of registered CS-IDs is below the original threshold. If the threshold is used in such a situation, no alarm can be issued. Therefore, in such a situation, a smaller number, for example, the number of registered CS-IDs is used instead of the original threshold value. As a result, an alarm can be issued more accurately.

Further, immediately after the registration, the arrival alarm occurrence condition is satisfied. In order to prevent an alarm from being issued immediately after registration, generation of an alarm is prohibited until a predetermined time elapses after registration or until a user issues a command regarding the alarm.

The CS registration unit 32 and the alarm control unit 34 also use the results of intermittent reception. That is, the CS-ID and the reception level obtained by the intermittent reception are used.
Of course, it is possible to use only the information obtained by intermittent reception. However, in order to know the latest situation, it is better to perform a CS search separately from intermittent reception, and supplement the results of intermittent reception. Use as

[Brief description of the drawings]

FIG. 1 is a block diagram showing a functional configuration of a PHS terminal according to one embodiment of the present invention.

FIG. 2 is a flowchart illustrating a flow of an operation of a CS registration unit.

FIG. 3 is a flowchart illustrating a flow of an operation of an alarm control unit.

FIG. 4 is a flowchart showing a flow of an operation of a CS search unit.

FIG. 5 is a timing chart showing a relationship between intermittent reception and CS search timing.

FIG. 6 is a space diagram illustrating an example of a usage pattern of the PHS terminal according to the present embodiment.

[Explanation of symbols]

10 operation section, 18 alarm section, 24 signal processing control section, 26 memory, 30 CS search section, 32 CS registration section, 34 alarm control section.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04B 7/26 H04Q ⁷ /00-7/38

Claims (18)

(57) [Claims] 1. A plurality of base stations which are geographically dispersed to cooperatively cover an area to be provided with a service and wirelessly connected to the base station or another portable device to perform communication. A base station, each base station wirelessly transmits its own base station identification code to its surroundings, and the base station identification code from the surrounding base station when the mobile device is not communicating. In a mobile communication system for intermittently receiving and checking the reception status, in the alarm method executed by the portable device, a command to register the current location of the portable device as an alarm point is given. A registration procedure for registering the base station identification code inside the portable device, with respect to a base station transmitting a base station identification code that can be received in a reception state equal to or higher than the registration standard, up to a predetermined base station maximum registration number, Current location A first base station group that is a set of base stations transmitting base station identification codes that can be received in a reception state equal to or higher than the detection criterion, and a set of base stations related to the base station identification codes registered in the registration procedure Is compared with the second base station group based on the base station identification code. If the number of base stations belonging to both the first and second base station groups is equal to or greater than a predetermined alarm reference number, the alarm point Performing an alarm procedure for issuing an alarm indicating arrival to the vehicle. 2. The alarm method according to claim 1, wherein when executing the alarm procedure, the number of base stations belonging to both the first and second base station groups is less than the alarm reference number and a predetermined spare number is set. An alarm method characterized by issuing an alarm indicating arrival near an alarm point when the number is equal to or greater than an alarm reference number. 3. The alarm method according to claim 1, wherein when executing the alarm procedure, the number of base stations belonging to both the first and second base station groups is equal to or less than the alarm reference number. An alarm indicating that the vehicle is approaching an alarm point when the number of alarms increases from the number below the reference number of approach alarms to the number equal to or more than the reference number of approach alarms. 4. The alarm method according to claim 1, wherein when executing an alarm procedure, the number of base stations belonging to both the first and second base station groups is equal to the alarm reference number. An alarm method characterized by issuing an alarm indicating departure from an alarm point when the number of alarms is reduced from a number equal to or more than a predetermined number of departure alarms to a number lower than the number of alarms. 5. The alarm method according to claim 1, wherein when performing an alarm procedure, the number of base stations belonging to both the first and second base station groups is equal to the alarm reference number. An alarm method comprising: issuing an alarm indicating escape from an alarm point when the number of alarms increases from a number below the alarm reference number to a number equal to or more than the alarm reference number and then decreases again to a number below the alarm reference number. 6. A plurality of base stations which are geographically dispersed to cooperatively cover an area to be provided with a service and wirelessly connected to the base station or another portable device for communication. A base station, each base station wirelessly transmits its own base station identification code to its surroundings, and the base station identification code from the surrounding base station when the mobile device is not communicating. In a mobile communication system for intermittently receiving and checking the reception status, in the alarm method executed by the portable device, a command to register the current location of the portable device as an alarm point is given. A registration procedure for registering the base station identification code inside the portable device, with respect to a base station transmitting a base station identification code that can be received in a reception state equal to or higher than the registration standard, up to a predetermined base station maximum registration number, Current location A first base station group that is a set of base stations transmitting base station identification codes that can be received in a reception state equal to or higher than the detection criterion, and a set of base stations related to the base station identification codes registered in the registration procedure Is compared with the second base station group based on the base station identification code, and the number of base stations belonging to both the first and second base station groups is determined from the number below the predetermined proximity alarm reference number. An alarm procedure for issuing an alarm indicating that the approach to the alarm point is in progress when the number of approach alarms exceeds the reference number. 7. A plurality of base stations which are geographically dispersed to cooperatively cover an area to be provided with a service and wirelessly connected to the base station or another portable device for communication. A base station, each base station wirelessly transmits its own base station identification code to its surroundings, and the base station identification code from the surrounding base station when the mobile device is not communicating. In a mobile communication system for intermittently receiving and checking the reception status, in the alarm method executed by the portable device, a command to register the current location of the portable device as an alarm point is given. A registration procedure for registering the base station identification code inside the portable device, with respect to a base station transmitting a base station identification code that can be received in a reception state equal to or higher than the registration standard, up to a predetermined base station maximum registration number, Current location A first base station group that is a set of base stations transmitting base station identification codes that can be received in a reception state equal to or higher than the detection criterion, and a set of base stations related to the base station identification codes registered in the registration procedure Is compared with the second base station group based on the base station identification code, and the number of base stations belonging to both the first and second base station groups is equal to or less than the alarm reference number. An alarm procedure for issuing an alarm indicating a departure from an alarm point when the number of the alarms is reduced from the number of pieces or more to a number below the reference number of departure alarms. 8. A plurality of base stations geographically dispersed to cooperatively cover an area to be provided with a service and wirelessly connected to the base station or another portable device for communication. A base station, each base station wirelessly transmits its own base station identification code to its surroundings, and the base station identification code from the surrounding base station when the mobile device is not communicating. In a mobile communication system for intermittently receiving and checking the reception status, in the alarm method executed by the portable device, a command to register the current location of the portable device as an alarm point is given. A registration procedure for registering the base station identification code inside the portable device, with respect to a base station transmitting a base station identification code that can be received in a reception state equal to or higher than the registration standard, up to a predetermined base station maximum registration number, Current location A first base station group that is a set of base stations transmitting base station identification codes that can be received in a reception state equal to or higher than the detection criterion, and a set of base stations related to the base station identification codes registered in the registration procedure Is compared with the second base station group based on the base station identification code, and the number of base stations belonging to both the first and second base station groups is reduced from the number below the alarm reference number to the alarm reference number. An alarm procedure for issuing an alarm indicating an escape from the alarm point when the number of alarms has decreased to a number below the alarm reference number after the number has increased to the above number. 9. The alarm method according to claim 1, wherein the command to register the current location of the portable device as an alarm location includes information for identifying the alarm location, This information is also registered when executing the registration procedure, and by using this information when executing the alarm procedure, multiple alarm points are registered in the portable device and an alarm is issued for each alarm point An alarm method, characterized in that: 10. The alarm method according to claim 9, wherein execution of the alarm procedure is prohibited except for the alarm point selected by the user among the registered alarm points. 11. The alarm method according to claim 1, wherein when the registration procedure is performed, a command to register the current location of the portable device as an alarm location is given. And receiving a base station identification code from the base station and checking the reception status. 12. The alarm method according to claim 1, wherein the alarm procedure is periodically executed at a cycle longer than the intermittent reception cycle. An alarm method characterized by receiving a base station identification code from a surrounding base station and examining the reception status separately from the intermittent reception. 13. The alarm method according to claim 1, wherein, when executing a registration procedure and / or an alarm procedure, a reception status checked by said intermittent reception is used. How to alarm. 14. The alarm method according to claim 1, wherein the alarm procedure is performed until a predetermined time elapses after execution of the registration procedure or until a user issues a command regarding the alarm. An alarm method characterized by prohibiting the execution of an alarm. 15. The alarm method according to claim 1, wherein the number of base station identification codes registered in the portable device is less than the number of alarm references. In place of the number, the number of registered base station identification codes
An alarm method characterized by being used in an alarm procedure. 16. The alarm method according to claim 1, wherein a base station transmitting a base station identification code that can be received in a reception state equal to or higher than the registration criterion at the time of performing the registration procedure is performed. An alarm method characterized by notifying a user that registration has not been possible when the information does not exist. 17. The alarm method according to claim 1, wherein the registration criterion relates to a better reception condition than the detection criterion. 18. The alarm method according to claim 1, wherein, when executing the alarm procedure, generating a vibration, a sound or a light to call a user's attention, and giving a name of the alarm point to the user. An alarm method characterized by generating an alarm by displaying at least one of a notifying character or symbol and transmitting information to another communication device.