JP2005167318A - Wait receiving method of cellular phone terminal and terminal device of cellular phone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain power saving without causing deterioration in performance in waiting in a terminal device of a cellular phone. <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 other 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 the 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 relates to a standby reception method for a mobile phone terminal and a terminal device for a mobile phone that are preferably implemented in a mobile phone system such as PDC or GSM.

  In the above-mentioned PDC (Personal Digital Cellular) and GSM (Global System for Mobile communications), TDMA / FDD (Time Division Multiple Access / Frequency Divided Device), etc. As a result of efficiency improvements, power consumption is reduced in parts related to wireless communication. However, since the sales of mobile phone terminal devices vary greatly depending on the installed application, various applications have been installed, and even lower power consumption can be achieved in the wireless communication part. Is desired. Here, in the portion related to the wireless communication, the power consumption during a call is strictly determined according to the standard so that the communication procedure is indicated by the wireless section interface between the base station and the terminal device of Non-Patent Document 1. In addition, the efficiency of the amplifier has almost reached its limit, so a large effect cannot be expected. However, the power consumption during standby is improved because there are no strict standards. There is room for.

  FIG. 10 is a diagram for explaining the standby reception operation of the mobile phone terminal device, and FIG. 11 is a timing chart for explaining the standby reception operation. FIG. 11 is shown in Non-Patent Document 1. In the case of the TDMA / FDD system, the base station BSi (i = 0, 1, 2,..., N, hereinafter indicated by subscripts 0 to n when it is necessary to indicate the station number, is a generic name. In this case, the transmission timing of the downlink signal from the subscripts 0 to n to the terminal device MS and the transmission timing of the uplink signal from the terminal device MS to the base station BS are time-division slotted and transmitted / received. Different carrier frequencies are used.

  When the communication line of the mobile phone is used, the service areas of the base stations are large and overlap each other. Therefore, as shown in FIG. 10, the terminal device MS has a plurality of base stations BSi. Be recognized. Therefore, with a mobile phone, if a zone is changed from the currently waiting base station zone to another base station zone so that outgoing calls and incoming calls can be made quickly, the mobile phone can immediately move to standby at that base station. In order to perform such zone transition determination, in addition to the radio wave reception level (local zone level) from the currently waiting base station BS0, radio wave reception levels (neighboring zones) from the remaining base stations BS1 to BSn Level) is also measured periodically.

  Therefore, 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 standby base station BS0 every predetermined sampling period Ts, and the electric field strength thereof. The level is stored as the 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.

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.
RCR STD-27 (Digital Car Telephone System) Standard (ARIB (Association of Radio Industries and Businesses))

  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 has not been 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 a standby reception method for a mobile phone terminal and a mobile phone terminal device that can shorten the reception time during standby and save power without incurring performance degradation during standby. It is.

  In the standby reception method of the mobile phone terminal of the present invention, in order to make a zone transition determination from the zone of the currently standby base station to the zone of another base station, the other base stations other than the currently standby base station In a standby reception method of a mobile phone terminal that also receives a signal from a station, it is determined whether or not the mobile phone terminal is in a moving state, and when the signal from the other base station is in a moving state, Reception is performed at a predetermined first frequency, and when it is in a stopped state, reception is performed at a predetermined second frequency lower than the first frequency.

  According to the above configuration, a signal from another base station is received in addition to the base station currently standing by, and a base station that is a candidate for switching is determined from the reception result, and the electric field strength level is reduced. In the standby reception method of the mobile phone terminal configured to switch to the base station of the shifted zone and determine that the zone has shifted to the zone of another base station from the currently standby base station zone, In the present invention, it is determined whether or not the terminal is in a moving state based on an electric field strength level, an error rate, and the like. When it is determined that the terminal is in a moving state, a signal from the other base station is predetermined. And when it is determined that the vehicle is in a stopped state, it is received at a predetermined second frequency lower than the first 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.

  In addition, the mobile phone terminal device according to the present invention provides a receiving means other than the currently standby base station in order to perform zone transition determination from the zone of the currently standby base station to the zone of another base station. Whether or not the terminal device is in a moving state in a mobile phone terminal device that receives signals from other base stations and from which the switching control means determines a base station that is a candidate for switching. The determination means for determining whether or not the signal from the other base station is received by the reception means at a predetermined first frequency when the determination means determines that the signal is in a moving state, and is in a stopped state. Receiving control means for receiving the signal at a predetermined second frequency lower than the first frequency.

  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 terminal device of the present invention, in the present invention, the determination means determines whether or not the terminal device is in the moving state from the field strength level, the error rate, etc., and the reception control means determines that it is in the moving state. When received, the receiving means receives a 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 frequency lower than the first frequency is determined. In to receive. 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.

  Furthermore, in the mobile phone terminal of the present invention, the determination means determines that the mobile device is in a moving state when the amount of change in electric field strength in the received signal from the currently waiting base station is equal to or greater than a predetermined threshold. And when it is less than the said threshold value, it determines with it being a stop state, It is characterized by the above-mentioned.

  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.

  In the mobile phone terminal of the present invention, the determination means determines that the received signal from the currently waiting base station is in a moving state when an error occurs, and the error does not occur. Sometimes it is determined that the vehicle is stopped.

  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.

  Furthermore, in the mobile phone terminal of the present invention, the determination means determines the moving state and the stopped state in consideration of the field strength level and / or error rate of the received signal from the other base station. It is characterized by performing.

  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 has been some change in the surrounding environment of the terminal device, it is not considered as a stopped state, but is considered as a moving state. The base station receives signals from the base station as usual, and searches for other base stations that are candidates for the standby change destination.

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

  Further, in the mobile phone terminal device of the present invention, the determination means receives signals from all base stations once after transitioning to the standby state and after switching from the stopped state to the moving state, It is characterized by determining whether it is a movement state or a stop state.

  According to the above configuration, after shifting to the standby state by turning on the power or ending the call, and after switching from the stopped state to the moving state, signals from all base stations are received at least once, It is determined whether the moving state or the 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.

  Furthermore, in the mobile phone terminal device of the present invention, the reception control means predetermines only that the signal from the other base station is higher than a predetermined signal quality over a predetermined period. It is characterized by receiving at a period.

  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.

  Further, in the mobile phone terminal of the present invention, the reception control means receives the signals from the other base stations only having higher signal quality at a predetermined cycle over a predetermined period. It is characterized by making a means 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.

  As described above, the standby reception method of the mobile phone terminal of the present invention receives signals from other base stations in addition to the currently standby base station, and determines a base station that is a candidate for switching from the reception result. In addition, if it is determined that the zone of the base station that is currently on standby has shifted to the zone of another base station due to a decrease in the electric field strength level, etc., the base station of the zone that has been switched to is switched to standby. In the standby reception method of the mobile phone terminal, it is determined whether or not the terminal is in a moving state based on the electric field strength level, the error rate, and the like, and when it is determined that the terminal is in a moving state, from the other base station The signal is received at a predetermined first frequency, and when it is determined that the signal is in a stopped state, the signal is received at a predetermined second frequency 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.

  Further, as described above, in the mobile phone terminal device of the present invention, the receiving means also receives signals from other base stations in addition to the currently standby base station, and the switching control means switches from the reception result. If it is determined that the base station that is currently waiting has transitioned to the zone of another base station from a decrease in the field strength level, etc. In the mobile phone terminal device that is switched to stand by, the determination means determines whether the terminal device is in a moving state from the electric field strength level, error rate, etc., and the reception control means When it is determined that the mobile unit is in a moving state, the receiving unit receives a signal from the other base station at a predetermined first frequency, and when it is determined that the mobile unit is in a stopped state, the signal is lower than the first frequency. It is received at the second frequency to determine fit.

  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.

[Embodiment 1]
FIG. 1 is a block diagram showing an electrical configuration of a mobile phone terminal device 1 according to an embodiment of the present invention. The terminal device 1 is the terminal device MS in FIG. 10 and generally includes a user interface 2 including a speaker, a microphone, a display device, an input operation unit, and the like, a nonvolatile memory, and the like. A communication control unit 3 for creating a radio signal to be transmitted and received; 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 control unit 3 and a level measurement unit 6 that measures the reception level of the signal from the base station received by the radio unit 4 and gives the signal to the communication control unit 3.

  In the terminal 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 waiting. On the other hand, the control signal such as a paging signal is received every predetermined period Ts, and for the other base stations, when the terminal device 1 is in the moving state, the predetermined sampling period Ts is set as the normal mode. Is received at a predetermined first frequency, and when it is in a stopped state, it is received at a predetermined second frequency lower than the first frequency as the low power consumption mode. Further, the communication control unit 3 which is also a switching control unit performs zone shift determination from the reception result of the control signal from the base station currently waiting and other base stations by the radio unit 4, and when it shifts, The currently waiting base station that is a base station to be accessed at the time of a call 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 Non-Patent Document 1, 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 terminal device 1 is in a moving state, the terminal device 1 enters the normal mode and receives the other base stations BS1 to BSn as usual, When it is in the stopped state, it becomes a low power consumption mode, 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 terminal device 1 is in a moving state or 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 mobile phone terminal device according to another embodiment of the present invention. The terminal device that realizes this processing can be realized by the configuration of the terminal device 1 shown in FIG. 1 described above, and is performed as the processing in step S5 of FIG. 3, and the movement / stop determination processing shown in FIG. Similar parts are indicated 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 a movement / stop determination process in a mobile phone terminal device according to still another embodiment of the present invention. The terminal device that realizes this processing can also be realized by the configuration of the terminal device 1 shown in FIG. 1 described above, and is performed as the processing in step S5 of FIG. 3, and the movement / stop shown in FIG. 6 and FIG. Similar to the determination processing, corresponding parts are denoted by the same step numbers, 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 amount of change in the field strength level Fj of the received signal from the base station BSj is large and the surrounding environment of the terminal device 1 is considered to have changed, As a result, it is necessary to switch the standby destination because 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. Case, it is possible to change 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.

  Furthermore, 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 can be determined from their variations. Good.

It is a block diagram which shows the electric constitution of the terminal device of the mobile telephone 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 terminal 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 the movement / stop determination process in the terminal device of the mobile telephone of the other embodiment of this invention in detail. It is a flowchart which shows the movement / stop determination process in the terminal device of the mobile telephone 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 Terminal apparatus of mobile phone 2 User interface 3 Communication control part 4 Radio | wireless part 5 Antenna part 6 Level measurement part BS0 Base station BS1-BSn which is currently waiting Other base station MS Terminal apparatus

Claims (8)

A mobile phone configured to receive a signal from the other base station in addition to the currently standby base station in order to perform zone transition determination from the zone of the currently standby base station to the zone of another base station. In the standby reception method of the terminal,
Determine whether the mobile phone terminal is moving,
The signal from the other base station is received at a predetermined first frequency when in a moving state, and is received at a predetermined second frequency lower than the first frequency when in a stopped state. A standby reception method for mobile phone terminals. In order to make a zone transition determination from the zone of the currently standby base station to the zone of another base station, the receiving means also receives signals from the other base stations in addition to the currently standby base station, From the reception result, in the mobile phone terminal device in which the switching control means determines a base station that is a candidate for switching,
Determining means for determining whether or not the terminal device is in a moving state;
When the determination unit determines that the signal from the other base station is in the moving state, the reception unit receives the signal at a first predetermined frequency, and when it is determined that the signal is in the stopped state, the first unit Reception control means for receiving at a predetermined second frequency lower than the frequency of the mobile phone terminal 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 mobile phone terminal device according to claim 2, 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 mobile phone terminal device according to claim 3.   5. The determination unit according to claim 3, 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. Mobile phone terminal 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 mobile phone terminal device according to claim 3, wherein the mobile phone terminal device is determined.   6. The reception control unit according to claim 5, wherein a signal having a signal quality equal to or higher than a predetermined signal quality is received at a predetermined cycle over a predetermined period. Mobile phone terminal device.   The reception control means causes the reception means to receive only a signal having a higher signal quality in a predetermined period over a predetermined period. The mobile phone terminal device described.

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