JP2005167320A - 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 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 the error rate of the base station during waiting at present, and if the terminal device is in a stopping state, as for the other peripheral base stations, only the station whose reception signal quality is in a high order is received as received 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 shifts 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 addition to the radio wave reception level (local zone level) from the currently waiting base station BS0, the radio wave reception levels (peripheral zone levels) from the remaining base stations BS1 to BSn are also included. ) Is also configured to measure 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 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 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 the standby reception method of a mobile phone terminal that also receives a signal from a station, the signal quality of the received signal from the other base station is determined from the reception result at the receiving unit, and the signal is received over a predetermined period. As for the signals from the other base stations, only signals having higher signal quality are received in a predetermined cycle.

  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 transitioned zone and perform standby when it is determined that the zone has shifted from the zone of the currently standby base station to the zone of another base station. In the invention, the signal quality of the received signal from each base station is determined from the electric field strength level, the error rate, etc., and only the signal from the higher-order base station has a predetermined signal quality over a predetermined period. Receive at a fixed 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.

  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. In a mobile phone terminal device that receives a signal from another base station and from which the switching control means determines a base station that is a candidate for switching, from the reception result at the receiving means, A determination unit that determines the signal quality of a received signal from another base station, and a signal from the other base station that responds to a determination result by the determination unit over a predetermined period, Including reception control means for causing the reception means to receive only the higher-order ones in a predetermined cycle.

  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.

  Furthermore, in the mobile phone terminal device according to the present invention, the reception control means determines whether or not the terminal device is in a moving state, and when signals from the other base stations are in a moving state, When the signal is in a stopped state, only the signal having the highest signal quality is received.

  According to the above configuration, it is determined whether or not the terminal device is in a moving state based on the electric field strength level and the error rate. When it is determined that the terminal device is in a moving state, a signal from the other base station is determined. When it is determined that the signal is in the stopped state, only the signal having the highest signal quality is received as described above.

  Therefore, in a mobile state where the base station to be standby may change, signals from all base stations are received, so the time required for making a call as described above, and the time required for an incoming call There will be no degradation in standby performance that would increase the time.

  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, in the present invention, the signal quality of the received signal from each base station is determined from the field strength level, the error rate, etc., and the signal quality is only the signal from the higher-order base station. Are received in 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.

  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, in the present invention, the determination means determines the signal quality of the received signal from each base station from the field strength level, error rate, etc., and performs reception control. The means receives only a signal from a base station having a higher signal quality 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.

[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. If it is received sequentially for each time and is in a stopped state, only a station having a higher received signal quality is received. 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, In the stop state, the low power consumption mode is set, and only the station having the higher received signal quality is received. 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. 2 shows an example in which the other base station is configured to receive only the base stations having the field strength level of the top four stations, and is determined to be in a stopped state at the time t3. In the low power consumption mode, the base stations BS2, BSj, BSj + 1, BSn are received after the third reception cycle T3. An example of the measurement result of the electric field strength level in the first reception period T1 at this time is as shown in FIG. In this example, the base station that is a candidate for switching is BSj + 1 having the highest field strength level.

  After that, when it is determined that the vehicle is in the moving state and is in the stopped state again at time tx, the measurement results in the previous reception cycle Tx-2 are low in consumption after the reception cycle Tx from that time tx. Only the base stations with the highest four field strength levels in the power mode are received. In the example of FIG. 2, base stations BS2, BS3, BSj + 1, BSn-1 are received. That is, the field strength levels of the base stations BSj and BSn are relatively lowered, and instead, the field strength levels of the base stations BS3 and BSn-1 are relatively raised. An example of the measurement result of the electric field strength level in the reception cycle Tx-2 at this time is as shown in FIG. Also in this example, the base station that is a candidate for switching is BSj + 1 with the highest field strength level.

  FIG. 4 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. 5 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. 6 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. 7 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 peripheral zone level of only the station having the higher received signal quality is measured, and the reference self-zone level F0ave is measured. If it is in the moving state without updating the zone level, all the surrounding zone levels F1 to Fn are also updated while updating the own zone level F0ave to the latest value.

  Thus, in a stop state in which the base station BS0 that is a standby target is unlikely to change, a base that has a low electric field strength level or a large number of errors, has a poor reception signal quality, and a low possibility of being a standby target. By not receiving the signal from the station, the reception time during standby is shortened without incurring a decrease in performance during standby, which increases the time required for outgoing calls or the time required for incoming calls. Therefore, 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 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. 8 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. 4, and the movement / stop determination processing shown in FIG. Similar and 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. 9 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, which is performed as the processing in step S5 in FIG. 4 and is moved / stopped as shown in FIG. 7 and FIG. Similar to the determination process, corresponding parts are denoted by the same step numbers, and 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 the own zone level F0ave, the reception is further performed in step S57. The signal quality is higher, and the level Fj ′ of the received signal from another base station BSj that is continuing to receive 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.

  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.

  The comparison targets in steps S57 and S58 may be all of the higher-order stations with the received signal quality, but may be only a part. The received signal quality parameter is not limited to the electric field strength level, and may be an error rate. 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. Even in the moving state, not all the other base stations BS1 to BSn may be received, but only the station having the higher received signal quality may be received to further reduce power consumption.

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. It is a graph which shows the measurement result of the electric field strength level which implement | achieves the standby reception operation | movement shown in the said FIG. 3 is a flowchart for explaining a mode selection operation in the terminal device shown in FIG. 1. FIG. 5 is a flowchart for explaining in detail a process when it is determined as a moving state in the mode selection of FIG. 4. FIG. FIG. 5 is a flowchart for explaining in detail a process when it is determined as a stop state in the mode selection of FIG. 4. FIG. 6 is a flowchart showing in detail a movement / stop determination process in the mode selection operation of FIG. 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 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 (3)

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,
From the reception result at the receiving means, respectively determine the signal quality of the received signal from the other base station,
A standby reception method for a mobile phone terminal, wherein only signals having higher signal quality are received at predetermined intervals over a predetermined period. 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,
Determination means for determining the signal quality of the reception signal from the other base station from the reception result at the reception 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. A mobile phone terminal device.   The reception control means determines whether or not the terminal device is in a moving state, receives all signals from the other base stations when in a moving state, and receives the signal quality when it is in a stopped state. 3. The mobile phone terminal device according to claim 2, wherein only the upper one is received.

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