JP2005167321A - Emergency reporting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain power saving without causing deteriorating performance in waiting in an emergency reporting device possessed by a child, a lady, an aged person or a diseased patient to automatically report (call), by performing a button operation to call a call destination previously registered such as a close relative or a hospital via a cellular phone line if he/she encounters a crime, or feels sick. <P>SOLUTION: When power is turned on at a time t1 and the terminal is in a waiting state, a base station during waiting at present is received per cycle Tsj (j=1 to n), and an electric field intensity level is stored as an own zone level F0j. Also, one electric field intensity level in the ther peripheral base station is sequentially measured and stored as a peripheral zone level Fj per cycle Tsj. Further, it is determined whether or not the terminal device is in a moving state per reception cycle T from the electric field intensity level or error rate of the base station during waiting at present, and if the terminal device is in a stopping state, the reception of the other peripheral base station is stopped as stopped after a time t3. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention automatically issues (calls) a button, etc. when a child, woman, elderly person, sick patient, etc. holds and encounters a crime or feels bad. The present invention relates to an emergency call device that makes a call to a pre-registered call destination such as a close relative or a hospital via a public wireless communication line such as a mobile phone.

  2. Description of the Related Art An emergency call device for reporting an emergency situation such as a moving person or a vehicle to a pre-registered report destination via a public wireless communication line such as a mobile phone line is widely used. For example, Patent Document 1 discloses an emergency notification device mounted on a ship or an aircraft.

  In such an emergency call device, it is essential to issue a call (call) with certainty, and if the battery runs out when necessary, it is fatal. Therefore, when mounted on a transport device such as a ship or an aircraft as described above, a large generator or storage battery is used as a power source, and there is no need to worry about the power source. You need to care about the power supply. However, it is very troublesome to check the remaining capacity of the battery before going out and to set it to the charger when returning from the destination, and if the charging cycle is short like this, It becomes useless. Therefore, there is a strong demand for power saving in the emergency call device held by a person.

  On the other hand, as an emergency call device held by a person, a so-called PHS (Personal Handyphone System) is used to find a person's current location from the minute service area so that it can be used for searching elderly people and children. This service has been provided. As an emergency call device using the PHS, for example, Patent Document 2 can be cited. The term “service area” can be interpreted as both a service area of a telephone company such as XX city or XX prefecture and a zone (radio wave reach) of a certain base station. In the present specification, the latter is indicated.

However, in the system using the PHS, since the service area is small and limited as described above, and it cannot follow high-speed movement by a vehicle or the like, a communication line of a mobile phone has recently been used. The emergency call device used has also appeared as in Patent Document 3. In this patent document 3, since the communication line of a mobile phone (PDC: Personal Digital Cellular or GSM: Global System for Mobile communications) is much larger than the PHS, the current location of the held person is specified. Since the accuracy becomes coarse, a GPS (Global Positioning System) receiver is mounted to ensure high specific accuracy of the current position.
JP-A-6-119580 JP 2003-218994 A JP-A-6-338848

  However, when the above-described PHS is used, since the service area is very small as described above, the terminal device normally recognizes only one base station, and there are a plurality of overlapping areas. Are recognized in a very limited area between areas. Therefore, the terminal device only has to receive a control signal from the one base station, perform timing adjustment, and stand by in preparation for reporting (calling). On the other hand, when a communication line of a mobile phone is used, since the service areas of the base stations are large and overlap each other, a plurality of base stations are recognized from the terminal device.

  Here, the PHS, which is a simple mobile phone, and a mobile phone developed based on a car phone have different reception operations at the time of standby, so that a mobile phone can quickly make and receive calls. In order to make a zone transition determination so that when a zone is shifted from the zone of the currently standby base station to the zone of another base station, the transition to the standby at that base station can be performed immediately, from the currently standby base station In addition to the radio wave reception level (local zone level), the radio wave reception level (peripheral zone level) from the other base station is also measured periodically.

  FIG. 10 is a diagram for explaining the standby reception operation, and FIG. 11 is a timing chart for explaining the standby reception operation. In the case of TDMA / FDD (Time Division Multiple Access / Frequency Division Duplex) such as the PDC and GSM, the base station BSi (i = 0, 1, 2,... In some cases, subscripts 0 to n are added, and in general terms, subscripts 0 to n are omitted.) Transmission timing of a downlink signal from the terminal device MS to the base station BS The signal transmission timing is divided into time division slots, and different carrier frequencies are used for transmission and reception.

  In FIG. 10, a base station BS0 is a currently waiting base station, and the remaining base stations BS1 to BSn are other base stations. Then, at the time of standby, as shown in FIG. 11, the terminal device MS receives a control signal such as a paging signal transmitted from the currently waiting base station BS0 at every predetermined sampling period Ts, and its electric field strength level. Is stored as its own zone level F0. Further, within the period remaining within each sampling period Tsj (j = 1 to n), a control signal transmitted from one of the other base stations BS1 to BSn is received, and the electric field strength level is Store as zone level Fj. Similarly, in the next sampling period Tsj + 1, the base station BS0 that is currently waiting is received and the next base station BSj + 1 is received. FIG. 11 shows the base in the PDC system mobile phone device standardized as an RCR STD-27 (digital system automobile telephone system) standard by ARIB (Association of Radio Industries and Businesses). It shows a radio section interface between a station and a terminal device.

  In this way, the radio of each of the base stations BS1 to BSn that performs transmission using any of the n radio carriers (channels) that are called perch channels (usually n = 20 at the maximum in the case of the PDC). All the carriers are received once in one reception period T, for example, 720 msec, and the reception operation is continuously performed during standby. When the own zone level F0 is lowered or the like and becomes lower than the maximum value of the peripheral zone level Fj by a predetermined threshold value or more, it becomes necessary to switch to the base station having the maximum value, that is, the zone shift Is done.

  Therefore, in the conventional technology as described above, the carrier measurement of the base station which has almost no possibility of zone shift, for example, the 10th or later in the electric field strength level is also performed at every reception cycle T. The actual situation is that the actual reception period in T is long, and the demand for power saving is not sufficiently met. Further, for example, when the terminal device MS is moving, there is a high possibility of switching the standby destination, while when it is stopped, the possibility of switching the standby destination is low. It is hard to say that the power saving operation is properly realized depending on the situation of the MS.

  An object of the present invention is to provide an emergency call device capable of shortening a reception time during standby and reducing power consumption without causing degradation in performance during standby.

  The emergency call device according to the present invention is a base station in an emergency call device that issues a report in response to an operation input of a portable user and makes a report to a pre-registered report destination via a public wireless communication line. In addition to the currently standby base station in the communication means, in order to make a zone transition determination from the zone of the currently standby base station to the zone of another base station A switching control means for receiving a signal from the other base station and determining a base station that is a candidate for switching from the reception result; and a determination means for determining whether or not the emergency call device is in a moving state; When the determination means determines that the signal from the other base station is in the moving state, the communication means receives the signal at a predetermined first frequency, and when the determination means determines that the signal is in the stopped state, Than frequency of 1 Characterized in that it comprises a reception control means for receiving at a second frequency defining a low advance.

  According to the above configuration, when a child, woman, elderly person, sick patient, etc. holds and encounters a crime or feels unwell, it automatically issues a call (calling) by performing a button operation, etc. In an emergency call device that sends a call to a registered person such as a close relative or a hospital via a public wireless communication line such as a mobile phone, the emergency call device is a zone (service area). A control signal is received at a predetermined cycle for a base station that is in the network and capable of communication, and that the emergency call device actually calls (accesses) at the time of reporting. However, it is possible to issue a report by adjusting the timing and making the base station recognize the presence of the emergency call device. Then, the base station that is waiting for the control signal and is the destination of the call is a base station that is currently waiting, and when the zone of the base station is shifted to the zone of another base station, It is necessary to switch the currently waiting base station so that communication with the base station is possible.

  Therefore, in the present invention, in order to perform the zone shift determination from the zone of the base station that is currently waiting to the zone of another base station, the communication means uses a base station other than the base station that is currently waiting in the communication means. A signal is also received, and the switching control means determines a base station that is a candidate for switching from the reception result. On the other hand, the determination means determines whether or not the emergency call device is in a moving state based on the electric field strength level, error rate, etc., and the reception control means is in a moving state in response to the determination result. When it is determined that the reception means receives the signal from the other base station at a predetermined first frequency, and when it is determined to be in a stopped state, a predetermined second lower than the first frequency is determined. Receive at a frequency. It is assumed that the second frequency includes a frequency of 0 in which reception is suspended until it is determined again as a moving state.

  Therefore, in a stopped state in which the base station to be a standby target is unlikely to change, reception of a signal from the other base station is compared to a moving state in which the base station to be a standby target is likely to change. Since the frequency is reduced, i.e., thinning-out reception is performed, the standby reception time is shortened and reduced without incurring standby performance degradation that would increase the time required for outgoing calls or the time required for incoming calls. Electricity can be achieved. As a result, the standby time can be extended. Or, if the standby time is the same, the battery capacity can be reduced.

  Further, in the emergency call device of the present invention, the determination means determines that it is in a moving state when the amount of change in the electric field strength in the received signal from the currently waiting base station is equal to or greater than a predetermined threshold, When it is less than the threshold value, it is determined that the vehicle is stopped.

  According to the above configuration, since the amount of change in the electric field strength of the received signal from the base station that is currently waiting that is constantly received periodically, it is determined whether the moving state or the stopped state. As described above, the switching between the two states can be determined more quickly than the determination based on the reception result of the signal from the other base station that is performing thinning reception. Further, the electric field strength level can be easily determined.

  Furthermore, in the emergency call device according to the present invention, the determination unit determines that the received signal from the currently waiting base station is in a moving state when an error occurs, and when the error does not occur. It is determined that the vehicle is in a stopped state.

  According to the above configuration, when the field strength of the received signal from the currently standby base station is monitored to determine whether it is in the moving state or the stopped state, the currently standby base station From the presence or absence of an error in the received signal from the station, it is determined whether the moving state or the stopped state.

  Therefore, for example, there is little change in the electric field strength level of the received signal from the currently waiting base station, and even if it can be regarded as a stopped state, if an error has occurred in the received signal, reception is always good However, there is a possibility that the standby destination may need to be changed, so that the base station itself is moved to receive all base station signals and search for other base stations. Thus, when it becomes necessary to switch the standby destination, it can be changed immediately.

  Further, in the emergency call device according to the present invention, the determination means determines the movement state and the stop state in consideration of the field intensity level and / or error rate of the received signal from the other base station. It is characterized by.

  According to the above configuration, in determining whether the moving state or the stopped state, it is not determined only by the electric field strength or error of the received signal from the base station currently waiting as described above, The determination is made in consideration of the field strength level and / or error rate of the received signals from other base stations. Specifically, for example, even if the amount of movement is small and the amount of change in the electric field strength level of the received signal from the currently waiting base station is less than the threshold value, If the amount of change in the electric field strength level of the received signal from the station is large and it is considered that there is some change in the surrounding environment of the emergency call device, it is considered as a moving state, not as a stop state, Signals from other base stations are received as usual, and other base stations that are candidates for the standby change destination are searched.

  Therefore, when it becomes necessary to switch the standby destination, it can be changed immediately.

  Furthermore, in the emergency call device of the present invention, the determination means receives signals from all base stations once after shifting to the standby state and after switching from the stopped state to the moving state, and moves It is characterized by determining whether it is a state or a stop state.

  According to the above configuration, after shifting to the standby state due to power-on or the like, and after switching from the stopped state to the moving state, it receives at least one signal from all base stations and is in the moving state. Or whether it is in a stopped state.

  Therefore, from the transition to the standby state or switching to the moving state, it is possible to quickly determine the stop state and switch the state compared to the case where the moving state is maintained for a predetermined time.

  In the emergency call device according to the present invention, the reception control means receives only signals having a signal quality equal to or higher than a predetermined signal quality over a predetermined period at a predetermined period. It is characterized by making it.

  According to the above configuration, when the determination unit determines the movement state and the stop state in consideration of the reception signal from the other base station, the other base station determines the signal quality of the reception signal. Is limited to stations having a predetermined value or more. The predetermined period includes a period until the next signal quality is determined and a period until a call is made or received. Within the predetermined period, signals with a quality lower than the predetermined signal quality are thinned out and received. However, even if thinning reception is performed, a signal having a signal quality equal to or higher than the predetermined signal quality is not received in the vacant reception cycle, and a reception cycle of the signal having the predetermined signal quality or higher is constant.

  Therefore, since the signal strength level is low or there are many errors, the received signal quality is poor, and signals from a base station that is not likely to be switched are not received. Can be determined with high accuracy.

  Furthermore, in the emergency call device of the present invention, the reception control means is configured to receive the signals from the other base stations having a higher signal quality at a predetermined cycle over a predetermined period. It is made to receive.

  According to the above configuration, when the determination unit determines the movement state and the stop state in consideration of the reception signal from the other base station, the other base station determines the signal quality of the reception signal. Is limited to higher stations. The predetermined period includes a period until the next signal quality is determined and a period until a call is made or received. Within the predetermined period, signals with low signal quality are thinned out and received. However, even if decimation reception is performed, the station having the higher signal quality is not received in the vacant reception cycle, but the reception cycle of the higher station is fixed.

  Therefore, since the signal strength level is low or there are many errors, the received signal quality is poor, and signals from a base station that is not likely to be switched are not received. Can be determined with high accuracy.

  In addition, the emergency call device of the present invention is issued in response to the operation input of the user who is carrying, in the emergency call device for reporting to a pre-registered report destination via a public wireless communication line, A communication means for performing wireless communication with the base station, and a base station currently on standby in the communication means for performing zone transition determination from a zone of the base station currently on standby to a zone of another base station. In addition to the above, a signal from the other base station is also received, and a switching control means for determining a base station that is a candidate for switching from the reception result, and a signal quality determined in advance by the received signal from the reception result at the communication means In response to the determination result by the determination means and the determination means in the determination means, the signal from the other base station was higher than the predetermined signal quality over a predetermined period. Only things Wherein the at cycle defining fit and a reception control means for receiving said communication means.

  According to the above configuration, in order to perform zone transition determination from the zone of the base station that is currently waiting to the zone of another base station, the base station from other base stations in addition to the base station that is currently standby in the communication means. A signal is also received, and the switching control means determines a base station that is a candidate for switching from the reception result. On the other hand, the determination means determines whether or not the received signal is equal to or higher than a predetermined signal quality from the electric field strength level, error rate, etc., and the reception control means informs the communication means that the predetermined signal quality or higher. Only signals from other base stations are received at predetermined intervals over a predetermined period. The predetermined period includes a period until the next signal quality is determined and a period until a call is made or received. Within the predetermined period, signals with a quality lower than the predetermined signal quality are thinned out and received. However, even if thinning reception is performed, a signal having a signal quality equal to or higher than the predetermined signal quality is not received in the vacant reception cycle, and a reception cycle of the signal having the predetermined signal quality or higher is constant.

  Therefore, since the signal strength level is low or there are many errors, the received signal quality is poor, and signals from base stations that are not likely to be switched are not received. The standby reception time can be shortened and power saving can be achieved without degrading standby performance that cannot be performed. As a result, the standby time can be extended. Or, if the standby time is the same, the battery capacity can be reduced.

  Furthermore, in the emergency call device according to the present invention, the reception control means may be configured to receive all other base stations that can be received if no received signal of the expected signal quality or higher is detected in the determination result of the determination means. The signal is received by the receiving means.

  According to the above configuration, when a received signal having a signal quality higher than the predetermined signal quality is not detected from signals from other base stations, the signal from any base station is not sufficient, but which is a candidate for switching. Therefore, signals from all other base stations that can be received are received.

  Therefore, although the power saving cannot be achieved, it is possible to quickly follow the change in the radio wave environment and find a switching candidate destination accurately.

  In addition, the emergency call device of the present invention is issued in response to the operation input of the user who is carrying, in the emergency call device for reporting to a pre-registered report destination via a public wireless communication line, A communication means for performing wireless communication with the base station, and a base station currently on standby in the communication means for performing zone transition determination from a zone of the base station currently on standby to a zone of another base station. In addition to the above, a signal from the other base station is received, and from the reception result, a switching control means for determining a base station that is a candidate for switching, and from the reception result at the communication means, from the other base station, In response to the determination result of each of the signal quality of the received signal and the determination result of the determination means, over the predetermined period, the signals from the other base stations are only those having the higher signal quality. , Predetermined lap In characterized in that it comprises a reception control means for receiving said reception means.

  According to the above configuration, the receiving means also receives signals from other base stations in addition to the currently standby base station, and from the reception result, the switching control means determines a base station that is a candidate for switching. In addition, when it is determined that the current base station zone has shifted to the other base station zone due to a decrease in the electric field strength level, the mobile phone is switched to the base station of the transitioned zone to perform standby. In the present invention, in the present invention, in the present invention, the determination means determines the signal quality of the received signal from each base station from the field strength level, the error rate, etc., and the reception control means Only the signal from the station is received at a predetermined cycle over a predetermined period. The predetermined period includes a period until the next signal quality is determined and a period until a call is made or received. Within the predetermined period, the lower quality stations are thinned out and received. However, even if decimation reception is performed, the higher-level station is not received in the vacant reception cycle, but the reception cycle of the higher-level station is fixed.

  Therefore, since the received signal quality is low due to low electric field strength level or errors, and signals from base stations that are not likely to be standby are not received, it is possible to make and receive calls. The reception time during standby can be shortened and power saving can be achieved without incurring performance degradation during standby. As a result, the standby time can be extended. Or, if the standby time is the same, the battery capacity can be reduced.

  As described above, the emergency call device of the present invention is automatically held by a button operation or the like when a child, a woman, an elderly person, a sick patient, etc. holds and encounters a crime or feels bad. The emergency call device that issues a call (call) to a pre-registered report destination such as a close relative or a hospital via a public wireless communication line such as a mobile phone is currently on standby. In order to perform zone transition determination from a base station zone to another base station zone, a signal from another base station is also received in addition to the currently standby base station, and a candidate for switching is obtained from the reception result. While determining the base station, it is determined whether or not the emergency call device is in a moving state from the electric field strength level, error rate, etc. Predetermined signals from other base stations Received at the first frequency that, when it is determined that the stop condition is received at a second frequency the predetermined lower than the first frequency.

  Therefore, in a stop state in which the base station to be a standby target is unlikely to change, a signal from the other base station is compared with a moving state in which the base station to be a standby target may change. Reducing the reception frequency, i.e., thinning-out reception, shortening the reception time during standby without incurring performance degradation during standby, such as the time required for outgoing calls or longer time required for incoming calls, Power saving can be achieved. As a result, the standby time can be extended. Or, if the standby time is the same, the battery capacity can be reduced.

  In addition, the emergency call device of the present invention, as described above, other than the currently standby base station, in order to make a zone transition determination from the zone of the currently standby base station to the zone of another base station Also receives signals from the base station, and determines the base station that is a candidate for switching from the reception result, and determines whether the received signal is higher than the predetermined signal quality from the field strength level and error rate In addition, only signals from other base stations having a signal quality equal to or higher than the predetermined signal quality are received in a predetermined cycle over a predetermined period.

  Therefore, since the received signal quality is poor because the electric field strength level is low or there are many errors, signals from base stations that are not likely to be switched are not received. Therefore, the standby reception time can be shortened and power saving can be achieved without causing a decrease in standby performance that cannot be performed. As a result, the standby time can be extended. Or, if the standby time is the same, the battery capacity can be reduced.

  In addition, the emergency call device of the present invention, as described above, other than the currently standby base station, in order to make a zone transition determination from the zone of the currently standby base station to the zone of another base station A signal from the base station is also received, and from the reception result, a base station that is a candidate for switching is determined, while the signal quality of the received signal from each base station is determined from the field strength level and error rate. Only a signal from a base station having a higher signal quality is received in a predetermined cycle over a predetermined period.

  Therefore, since the signal strength level is low or there are many errors, the received signal quality is poor and signals from base stations that are not likely to be standby are not received. The standby reception time can be shortened and power saving can be achieved without degrading standby performance that cannot be performed. As a result, the standby time can be extended. Or, if the standby time is the same, the battery capacity can be reduced.

[Embodiment 1]
FIG. 1 is a block diagram showing an electrical configuration of an emergency notification device 1 according to an embodiment of the present invention. The emergency call device 1 is the terminal device MS shown in FIG. 10, and is generally composed of a push button switch or the like, and a user interface 2 through which a portable user performs operation input, and a non-volatile device. In response to the operation input, the police, family, hospital, etc. are notified to the pre-registered report destination (call), a crime has been encountered, the condition has deteriorated, etc. A communication control unit 3 for transmitting a fixed message registered in advance, a radio unit 4 and an antenna unit 5 for transmitting a radio signal created by the communication control unit 3 via a radio communication line of a mobile phone, and the communication It comprises a level measurement unit 6 that is controlled by the control unit 3 and receives a signal from the base station received by the radio unit 4 and supplies the signal to the communication control unit 3 and a GPS receiver. When sending messages in order to transmit the current position information combined, performs position measurement, and and a position measurement section 7 which gives the measurement result to the communication control unit 3. The user interface 2 may be further provided with a speaker, a microphone, and the like in order to notify the report destination of the user's situation and condition.

  In the emergency call device 1 configured as described above, in the present embodiment, the communication control unit 3 that is a reception control unit and a determination unit is connected to the radio unit 4 that is a communication unit and the base station that is currently on standby. For other base stations, when the emergency call device 1 is in a moving state, the predetermined sampling is set as the normal mode for each base period Ts. Reception is performed at a predetermined first frequency of the period Ts, and when it is in a stopped state, reception is performed at a predetermined second frequency lower than the first frequency as the low power consumption mode. In addition, the communication control unit 3 which is also a switching control unit performs zone shift determination from the reception result by the radio unit 4 of the control signal from the currently waiting base station and other base stations. The currently standby base station that is a base station to be accessed at the time of notification (calling) is changed. The base station that is a candidate for switching the currently waiting base station is determined in advance from the reception result of the control signal.

  FIG. 2 is a timing chart for explaining a reception operation during standby according to the present embodiment. When the power is turned on at time t1 and a standby state is entered, the base station BS0 that is currently on standby (see FIG. 10), as defined in the ARIB standard, as in the prior art shown in FIG. Is received every predetermined sampling period Tsj (j = 1 to n), and the electric field strength level is stored as its own zone level F0j. Further, the normal mode and the low power consumption mode are determined every reception cycle T, and in the present embodiment, the first reception cycle T1 from the time t1 and the second reception cycle T2 from the time t2. For the remaining period within each sampling period Tsj, a control signal transmitted from one of the other base stations BS1 to BSn (see FIG. 10) is received, and its electric field strength level is Store as zone level Fj. In the next sampling period Tsj + 1, similarly, the base station BS0 currently waiting is received, the electric field strength level is stored as the own zone level F0j + 1, and the next base station BSj + 1 is received.

  It should be noted that, after the third reception cycle T3 from time t3, when the emergency call device 1 is in a moving state, the normal mode is entered and the other base stations BS1 to BSn are received normally. In the stop state, the low power consumption mode is set, and reception is performed less frequently than in the normal mode. The period of each reception cycle T is a value obtained by multiplying the sampling cycle Ts by the number of stations n of other base stations BS1 to BSn to be standby. In the PDC system, Ts = 720 msec and the maximum n = 20 and T = 14.4 sec.

  FIG. 3 is a flowchart for explaining the mode selection operation by the communication control unit 3. As described above, the process shown in FIG. 3 is performed every reception cycle T in which mode determination is performed. In step S1, the own zone level F0 based on the control signal from the currently waiting base station BS0 and the peripheral zone level Fj based on control signals from the other base stations BS1 to BSn are already measured by the level measuring unit 6, It is determined whether or not the data is stored in the communication control unit 3. If not, that is, at the time t1 which is the first processing timing immediately after the power is turned on, and in an unstored state as will be described later. Yes, at time t2 which is the second processing timing, the process proceeds to step S2, and it is determined whether or not there are measured values of the own zone level F0 and the surrounding zone level Fj. In step S2, when there is no measurement value, that is, at time t1, which is the first processing timing, the process proceeds to step S3, the normal mode is set, and the processing ends. On the other hand, in step S2, when there is a measurement value, that is, at time t2, which is the second processing timing after the completion of the first reception cycle T1, the process proceeds to step S4 and the first reception cycle T1. After the storage process of the own zone level and the surrounding zone level is performed, the process proceeds to step S3. In the storage process, the average value F0ave of the measured values F01, F02,..., F0n at each sampling period Tsj is obtained for the own zone level F0, and the measured values are obtained for the peripheral zone level Fj. The

  On the other hand, in step S1, when the data of the own zone level F0 and the surrounding zone level Fj are already stored in the wireless communication unit 3, that is, after time t3 which is the third processing timing, the process proceeds to step S5, which will be described later. Thus, it is determined whether the emergency call device 1 is in a moving state or in a stopped state. In step S6, it is determined which of the determination results is, and when it is in the moving state, processing at the time of movement determination is performed in step S7, and when it is in the stopped state, processing at the time of stop determination is performed in step S8. Exit.

  FIG. 4 is a flowchart for explaining in detail the processing at the time of movement determination in step S7. In step S71, it is determined whether or not it is currently in the normal mode. If not, that is, if it is determined from step S6 that the state has changed from the stopped state to the moving state in step S71, the process proceeds to step S72 and stored. The data of the local zone level F0ave and the peripheral zone level Fj are invalidated, and the process proceeds to step S73, the mode is switched to the normal mode, and the process is terminated. On the other hand, in step S71, when it is in the moving state, that is, when it is determined from step S6 that the moving state is continued in step S71, the process proceeds to step S74, and the own zone level F0ave and the surroundings The storage processing of the zone level Fj is performed, that is, the local zone level F0ave and the peripheral zone level Fj are updated to the latest values, and the direct processing is terminated without performing the mode switching.

  FIG. 5 is a flowchart for explaining in detail the processing at the time of stop determination in step S8. In step S81, it is determined whether or not the current mode is the normal mode. If so, that is, if it is determined from step S6 that the moving state is changed to the stopped state in step S81, the process proceeds to step S82. The own zone level F0ave and the peripheral zone level Fj are set in the measurement result in the reception cycle immediately before the stop state, and the process proceeds to step S83 where the mode is switched to the low power consumption mode and the process is terminated. On the other hand, when it is determined in step S81 that the vehicle is in a stopped state, that is, when it is determined from step S6 that the stopped state is continued in step S81, the current zone level F0ave and the surrounding zone level Fj are The storage process is not performed, that is, the update process is not performed with the previous value, and the process is terminated without switching the mode.

  FIG. 6 is a flowchart showing in detail the movement / stop determination process in step S5. In step S51, the average value of the measured values of the own zone level in the immediately preceding reception cycle is stored as F0ave '. In step S52, it is determined whether or not the immediately preceding reception period value F0ave 'is within a predetermined change threshold value F0th of the reference local zone level F0ave, and if it is within the range, it is stopped in step S53. If it is determined that the movement is out of the range, it is determined in step S54 that it is in the moving state, and the process ends.

  Therefore, in the present embodiment, the own zone level F0ave is stored immediately after the power is turned on and immediately after switching from the moving state to the stopped state, and the value F0ave ′ of the immediately preceding reception cycle is set to a predetermined value based on the own zone level F0ave. The movement / stop determination is made depending on whether or not it is within the range of the threshold value F0th. While the stop state continues, the surrounding zone level Fj is not measured (the reception frequency is 0), and the reference zone level F0ave is set as the reference. If it is in the moving state without being updated, the surrounding zone level Fj is also updated while updating its own zone level F0ave to the latest value.

  Thus, in the stop state in which the base station BS0 that is the standby target is unlikely to change, the base station BS0 that is the standby target is changed from the other base stations BS1 to BSn compared to the mobile state in which the base station BS0 is likely to change. By reducing the frequency of receiving the signal, the standby reception time is shortened and saved without incurring a decrease in standby performance that increases the time required for outgoing calls or the time required for incoming calls. Electricity can be achieved. As a result, the standby time can be extended. Or, if the standby time is the same, the battery capacity can be reduced.

  In the present embodiment, the amount of change in the electric field strength of the received signal from the currently waiting base station BS0 that is constantly receiving the movement / stop periodically at the sampling period Ts is a predetermined threshold value F0th. Therefore, the switching between the two states can be quickly determined. Further, the electric field strength level can be easily determined.

  Furthermore, in the present embodiment, after shifting to the standby state when the power is turned on (time t1) and after switching from the stopped state to the moving state (step S71 → S72), the normal mode is set (step S73). Once the signals from all the base stations BS0 to BSn are received at least once and it is determined whether the mobile station is in the moving state or the stopped state at the next determination timing. Compared with the case where the moving state is maintained for a predetermined time from the switching to the state, it is possible to quickly determine the stop state and switch the state.

[Embodiment 2]
FIG. 7 is a flowchart showing in detail the movement / stop determination process in the emergency call device according to another embodiment of the present invention. The emergency call device that realizes this process can be realized by the configuration of the emergency call device 1 shown in FIG. 1 described above, and is performed as the process in step S5 of FIG. 3, and the movement / stop determination shown in FIG. Similar to the processing, corresponding parts are denoted by the same step numbers, and description thereof is omitted. It should be noted that in this determination processing operation, when the own zone level F0ave ′ in the immediately preceding reception cycle is stored in step S51, the CRC of the control signal from the base station BS0 that is the standby target in step S55 is used. Data analysis is performed, and subsequently, in step S56, it is determined from the analysis result whether there is any error. If there is an error, the process proceeds to the step S54, and the movement determination is performed as it is. If there is no error, the process proceeds to the step S52, and it is determined whether or not it is within the change threshold F0th of the reference zone level F0ave. Furthermore, it is performed and it is determined whether it is a stop state or a movement state.

  As described above, according to the present embodiment, when the field strength of the received signal from the currently waiting base station BS0 is monitored, it is further determined when determining whether it is in a moving state or a stopped state. Based on the presence or absence of an error in the received signal from the base station BS0 that is currently in standby, it is determined whether the moving state or the stopped state. Therefore, for example, if the received base station BS0 has little change in the level of its own zone level F0j and can be regarded as a stopped state, it can always be received well if there is an error in the received signal. However, there is a possibility that the standby destination may need to be changed, so that the mobile station itself is in a moving state, receives signals from all base stations BS0 to BSn, and searches for other base stations BS1 to BSn. Thus, when it becomes necessary to switch the standby destination, it can be changed immediately.

[Embodiment 3]
FIG. 8 is a flowchart showing in detail the movement / stop determination process in the emergency call device according to still another embodiment of the present invention. The emergency call device that realizes this process can also be realized by the configuration of the emergency call device 1 shown in FIG. 1 described above, which is performed as the process in step S5 of FIG. 3, and the movement shown in FIG. 6 and FIG. / Similar to the stop determination process, the corresponding step is denoted by the same step number, and the description thereof is omitted. It should be noted that in this determination processing operation, it is determined that there is no error in step S56, and even if it is determined in step S52 that it is within the change threshold value F0th of its own zone level F0ave, The level Fj ′ of the received signal from the base station BSj is obtained, and the presence or absence of the change is also determined in step S58. Specifically, for the measured value Fj of the electric field strength level of the received signal from the other base station BSj serving as the reference stored in steps S4, S74, and S82, in step S57, in the previous reception cycle. The measured value Fj ′ is stored. In step S58, it is determined whether or not the immediately preceding reception period value Fj ′ is within the range of the predetermined change threshold value Fth of the reference peripheral zone level Fj. Sometimes, the process proceeds to step S53, where it is determined to be in a stopped state, and when it is out of range, the process proceeds to step S54, where it is determined to be in a moving state, and the process ends.

  The other base stations BSj may target all other base stations BS1 to BSn. However, the other base stations BSj have only a signal quality higher than a predetermined signal quality or higher signal quality. It is desirable to use only things. Specifically, only the base stations whose electric field strength level is equal to or higher than a predetermined value or error rate is equal to or lower than the predetermined value, or the predetermined number of stations in order of increasing electric field strength level, or the predetermined number of stations in order of increasing error rate. .

  This is shown in FIG. In FIG. 9, it is assumed that only the base station BSj having the sampling period Tsj is received. Therefore, an example is shown in which only one station having the signal quality equal to or higher than a predetermined value or only the station having the highest signal quality is received.

  In this way, the determination of the moving state and the stopped state is performed not only based on the electric field strength or error of the received signal from the currently waiting base station BS0 but also taking into account the received signals from other base stations BSj. For example, even if the amount of movement is small and the amount of change in the electric field strength level of the received signal from the currently waiting base station BS0 is less than the threshold value F0th, If the change amount of the electric field strength level Fj of the received signal from the base station BSj is large and it is considered that there is some change in the surrounding environment of the emergency call device 1, Assuming that the mobile station is in a moving state, it receives signals from the other base stations BS1 to BSn as usual and searches for other base stations that are candidates for the standby change destination, so it is necessary to switch the standby destination. If Flip, it can be changed immediately.

  Also, only stations whose signal quality is equal to or higher than a predetermined value, or higher-level stations with high signal quality are received, the field strength level is low, there are many errors, the received signal quality is poor, and the switching target Therefore, it is possible to determine the movement state and the stop state with high accuracy.

  In the example of FIG. 9, only the base station BSj having the sampling period Tsj is received. However, when there are a plurality of base stations whose signal quality is equal to or higher than a predetermined value, they may be received. Moreover, although only the station with the highest signal quality is received, a plurality of higher stations may be received.

  In addition, if a received signal of the predetermined signal quality or higher is not detected, the signal from any of the base stations BS1 to BSn is not of sufficient quality, but can be received because it does not have any judgment as to which of the switching candidates is a candidate for switching. You may make it receive the signal from all the other base stations BS1-BSn. In this case, although the power saving cannot be achieved, it is possible to quickly follow the change in the radio wave environment and find a switching candidate destination accurately.

  In order to improve the accuracy of the movement / stop determination, the position measurement unit 7 may be activated and the measurement result may be used. In addition, average values Fjave and Fjave 'in a plurality of reception periods are also obtained for the peripheral zone level Fj for each other base station for performing stop / movement determination, and may be determined from their variation. .

It is a block diagram which shows the electric constitution of the emergency call apparatus of one Embodiment of this invention. It is a timing chart for demonstrating the reception operation at the time of standby by one Embodiment of this invention. 3 is a flowchart for explaining a mode selection operation in the emergency call device shown in FIG. 1. FIG. 4 is a flowchart for explaining in detail a process when it is determined as a moving state in the mode selection of FIG. 3. FIG. 4 is a flowchart for explaining in detail processing when it is determined that the vehicle is stopped in the mode selection of FIG. 3. FIG. It is a flowchart which shows the movement / stop determination process in the mode selection operation | movement of the said FIG. 3 in detail. It is a flowchart which shows in detail the movement / stop determination process in the emergency call apparatus of the other form of implementation of this invention. It is a flowchart which shows the movement / stop determination process in the emergency call apparatus of the further another form of implementation of this invention in detail. It is a timing chart for demonstrating the reception operation | movement at the time of standby by the further another form of implementation of this invention. It is a figure for demonstrating the standby reception operation | movement of a mobile telephone. It is a timing chart for demonstrating the reception operation | movement at the time of standby of a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Emergency call apparatus 2 User interface 3 Communication control part 4 Radio | wireless part 5 Antenna part 6 Level measurement part 7 Position measurement part BS0 Base station BS1-BSn which is currently waiting Other base station MS terminal apparatus

Claims (10)

In the emergency call device that issues a report in response to the operation input of the user who is carrying it and makes a report to a pre-registered report destination via a public wireless communication line,
A communication means for performing wireless communication with a base station;
In order to perform zone transition determination from the zone of the base station currently waiting to the zone of another base station, the communication means receives signals from the other base stations in addition to the base station currently waiting, From the reception result, switching control means for determining a base station that is a candidate for switching, and
Determining means for determining whether or not the emergency call device is in a moving state;
When the determination means determines that the signal from the other base station is in the moving state, the communication means receives the signal at a predetermined first frequency, and when it is determined that the signal is in the stopped state, the first And a reception control means for receiving at a predetermined second frequency lower than the frequency of the emergency call device.   The determination means determines that the mobile station is in a moving state when the amount of change in electric field strength in a received signal from the currently standby base station is equal to or greater than a predetermined threshold value, and is in a stopped state when it is less than the threshold value. The emergency notification device according to claim 1, wherein the determination is made.   The determination means determines that the received signal from the currently waiting base station is in a moving state when an error occurs, and determines that the received signal is in a stopped state when no error occurs. The emergency call device according to claim 2.   4. The determination unit according to claim 2, wherein the determination unit determines the movement state and the stop state in consideration of a field intensity level and / or an error rate of a received signal from the other base station. Emergency call device.   Whether the determination means has received the signals from all the base stations once after transitioning to the standby state and after switching from the stopped state to the moving state, is it in the moving state or is in the stopped state? The emergency call device according to any one of claims 2 to 4, wherein the emergency call device is determined.   5. The reception control means, wherein a signal from the other base station is received at a predetermined cycle only for a predetermined signal quality over a predetermined period. Emergency call device.   5. The reception control unit causes the reception unit to receive only a signal having a higher signal quality from the other base station over a predetermined period in a predetermined cycle. The emergency call device described. In the emergency call device that issues a report in response to the operation input of the user who is carrying it and makes a report to a pre-registered report destination via a public wireless communication line,
A communication means for performing wireless communication with a base station;
In order to perform zone transition determination from the zone of the base station currently waiting to the zone of another base station, the communication means receives signals from the other base stations in addition to the base station currently waiting, From the reception result, switching control means for determining a base station that is a candidate for switching, and
Determination means for determining whether or not the received signal is equal to or higher than a predetermined signal quality from the reception result in the communication means;
In response to the determination result of the determination means, only the signals from the other base stations that are equal to or higher than the predetermined signal quality over a predetermined period are received by the communication means at a predetermined cycle. And an emergency call device.   The reception control unit causes the reception unit to receive signals from all other base stations that can be received when a reception signal of the predetermined signal quality or higher is not detected in the determination result of the determination unit. The emergency call device according to claim 8. In the emergency call device that issues a report in response to the operation input of the user who is carrying it and makes a report to a pre-registered report destination via a public wireless communication line,
A communication means for performing wireless communication with a base station;
In order to perform zone transition determination from the zone of the base station currently waiting to the zone of another base station, the communication means receives signals from the other base stations in addition to the base station currently waiting, From the reception result, switching control means for determining a base station that is a candidate for switching, and
Determination means for determining the signal quality of the received signal from the other base station from the reception result in the communication means,
In response to the determination result of the determination means, the reception control for causing the reception means to receive only signals having higher signal quality at a predetermined period over a predetermined period of time. And an emergency call device.

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