JP2010177968A - Wireless communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication device preventing spurious radio waves from being erroneously recognized as an objective channel even when the spurious radio waves are generated in a frequency band in the vicinity of the objective channel. <P>SOLUTION: A cellular phone 1 includes: an oscillator 32 correcting an oscillation frequency; a communication control unit 31 transiting to a standby state by receiving a channel for standby designated by any of a plurality of acquisition channels; a CPU 30 for sequentially updating a correction amount by a correction value of the oscillator 32 when acquiring an acquisition channel or a channel for standby; and a memory 35 for storing identification data based on a signal of the acquisition channel when the channel for standby cannot be received although a predetermined acquisition channel is successfully captured. When receiving a channel for standby identified by the stored identification data, the CPU 30 controls not to update the correction amount by the correction value of the oscillator 32 in acquiring the acquisition channel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wireless communication apparatus having an oscillator with a correction function.

  Conventionally, in a location registration procedure in a communication system of a wireless communication device such as a cellular phone, for example, in the CDMA2000_1x system, the wireless communication device captures a capture channel (pilot channel) and then shifts to a standby channel (paging channel). To transition to the standby state.

  By the way, when capturing this capture channel, there may be spurious radio waves (unnecessary radio waves) of a channel different from the target channel, and the target channel may not be received due to the influence of the spurious radio waves. Has been pointed out. In view of this, for example, the detection of spurious radio waves is avoided by making a judgment based on the magnitude of the received intensity, or by performing hardware removal using a filter or the like (see, for example, Patent Document 1).

JP 2001-102906 A

  However, if spurious radio waves of other channels are generated in the frequency band near the target channel, and this spurious radio wave is a signal similar to the target channel, this spurious radio wave is still mistaken for the target channel. There was a risk of recognition.

  An object of the present invention is to provide a wireless communication apparatus that can avoid erroneously recognizing a spurious radio wave as a target channel even if spurious radio waves are generated in a frequency band near the target channel.

  The wireless communication device according to the present invention captures an oscillator capable of correcting an oscillation frequency and any one of a plurality of frequency-divided capture channels, and based on the captured signal of the capture channel A communication unit that transitions to a communication standby state by receiving a standby channel designated by the capture channel, and the oscillator when the communication unit captures the capture channel or the standby channel. The control means for automatically correcting the oscillation frequency of the oscillator and sequentially updating the correction amount of the oscillator with the correction value based on the correction, and the communication means has successfully acquired a predetermined acquisition channel. Regardless, if the standby channel cannot be received based on the signal of the capture channel and the transition to the standby state cannot occur, the capture channel Storage means for storing identification data based on the signal of the channel for use, and when the control means receives the standby channel specified by the identification data stored in the storage means, the acquisition channel The correction amount is controlled not to be updated with the correction value of the oscillator at the time of capturing.

  Further, it is preferable that the storage unit stores the identification data when a predetermined number of times that the transition to the standby state cannot be made occurs based on the captured signal of the capturing channel.

  Further, it is preferable that the storage unit stores the identification data when it cannot be changed to the standby state continuously for a predetermined number of times based on the acquired signal of the acquisition channel.

  In addition, when the control unit captures the signal of the acquisition channel specified by the identification data stored in the storage unit, the control unit does not update the correction amount with the correction value of the oscillator at the time of acquisition. It is preferable to control such that

  In addition, when the control unit succeeds in receiving the standby channel based on the acquisition channel signal captured by the communication unit, the control unit determines the correction amount based on the correction value of the oscillator at the time of reception of the standby channel. It is preferable to control to perform the update.

  In addition, the control unit updates the correction amount with the correction value of the oscillator when the communication unit successfully receives the standby channel, and holds the correction value of the oscillator in a predetermined temporary storage area. In addition, when the acquisition channel specified by the identification data stored in the storage means is acquired and the standby channel based on the signal of the acquisition channel is received, the reception of the standby channel has failed. Then, it is preferable that the correction amount of the oscillator is updated using the correction value held in the temporary storage area, and the communication unit is made to acquire the standby channel.

  The acquisition channel is a pilot channel in the CDMA2000_1x scheme, and the standby channel is a paging channel in the CDMA2000_1x scheme that is acquired using identification data included in a synchronization message obtained from the pilot channel signal. Is preferred.

  The identification data is preferably a value for identifying a base station, a channel number, a PN code, or an offset value between base stations of a PN code.

  According to the present invention, even if spurious radio waves are generated in a frequency band near the target channel, it is possible to avoid erroneous recognition of the spurious radio waves as the target channel.

1 is an external perspective view of a mobile phone according to a first embodiment. It is a block diagram which shows the function of the mobile telephone which concerns on 1st Embodiment. It is a figure explaining the process which establishes the synchronization which concerns on 1st Embodiment. It is a figure explaining the spurious electromagnetic wave which concerns on 1st Embodiment. It is a figure explaining a mode that reception of a paging channel fails by the influence of the spurious electric wave concerning a 1st embodiment. It is a figure which shows the table which memorize | stored the determination information of the spurious electromagnetic wave which concerns on 1st Embodiment. It is a flowchart which shows the flow of a process of CPU which concerns on 1st Embodiment. It is a flowchart which shows the process of CPU following FIG. It is a flowchart which shows the flow of the process in the intermittent standby state of CPU which concerns on 1st Embodiment. It is a figure which shows the update procedure of the voltage for control of the oscillator which concerns on 2nd Embodiment. It is a flowchart which shows the flow of a process of CPU which concerns on 2nd Embodiment. It is a flowchart which shows the flow of the process in the intermittent standby state of CPU which concerns on 2nd Embodiment.

<First Embodiment>
Hereinafter, a first embodiment which is an example of a preferred embodiment of the present invention will be described. In the present embodiment, a mobile phone 1 will be described as an example of a wireless communication device. Note that the wireless communication device of the present invention is not limited to this, for example, a PHS (Personal Handyphone System), a PDA (Personal Digital Assistant), a navigation device having a communication function, a personal computer, and the like. The present invention can be applied to various wireless communication devices such as a communication module connected to.

  FIG. 1 is an external perspective view of a mobile phone 1 (wireless communication apparatus) according to the present embodiment. FIG. 1 shows a so-called foldable mobile phone, but the mobile phone according to the present invention is not limited to this. For example, a sliding type in which one casing is slid in one direction from a state in which both casings are overlapped, or a rotary type in which one casing is rotated around an axis along the overlapping direction ( Turn type), or a type (straight type) in which the operation unit and the display unit are arranged in one housing and does not have a connecting unit.

  The mobile phone 1 includes an operation unit side body 2 and a display unit side body 3. The operation unit side body 2 includes an operation unit 11 and a microphone 12 into which a voice uttered by a user of the mobile phone 1 is input on the surface unit 10. The operation unit 11 includes a function setting operation button 13 for activating various functions such as various setting functions, a telephone book function, and a mail function, and an input operation button 14 for inputting numbers of telephone numbers, mail characters, and the like. , And a determination operation button 15 for performing determination and scrolling in various operations.

  The display unit side body 3 includes a display unit 21 for displaying various types of information on the surface unit 20 and a receiver 22 for outputting the voice of the other party of the call.

  Further, the upper end portion of the operation unit side body 2 and the lower end portion of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the mobile phone 1 relatively rotates the operation unit side body 2 and the display unit side body 3 which are connected via the hinge mechanism 4, so that the operation unit side body 2 and the display unit side body 3 are rotated. The body 3 can be in an open state (open state), or the operation unit side body 2 and the display unit side body 3 can be folded (folded state).

  FIG. 2 is a block diagram showing functions of the mobile phone 1 according to the present embodiment. The mobile phone 1 includes a display unit 21, a CPU 30 (control unit), a communication control unit 31 (communication unit), an oscillator 32, an antenna 33, a voice control unit 34, a microphone 12, a receiver 22, and an operation. Unit 11 and a memory 35 (storage means).

  The CPU 30 controls the entire mobile phone 1, and performs predetermined control on the display unit 21, the communication control unit 31, the voice control unit 34, and the like, for example. Further, the CPU 30 receives input from the operation unit 11 or the like and executes various processes. Then, the CPU 30 controls the memory 35 to read various programs and data and write data when executing processing.

  The display unit 21 performs predetermined image processing according to the control of the CPU 30. Then, the processed image data is stored in the frame memory and output to the screen at a predetermined timing.

  The communication control unit 31 communicates with an external device (base station) in a predetermined use frequency band (for example, 2 GHz band, 800 MHz band, etc.). Then, the communication control unit 31 demodulates the signal received from the antenna 33, supplies the processed signal to the CPU 30, modulates the signal supplied from the CPU 30, and transmits the signal from the antenna 33 to the external device. .

  The oscillator 32 is used by the communication control unit 31 to tune a frequency in a predetermined frequency band and match with any one of a plurality of frequency-divided frequency channels. Specifically, the output frequency changes according to the voltage value controlled by the communication control unit 31.

  The sound control unit 34 performs predetermined sound processing on the signal supplied from the communication control unit 31 under the control of the CPU 30, and outputs the processed signal to the receiver 22. The receiver 22 outputs the signal supplied from the audio control unit 34 to the outside. This signal may be output from a speaker (not shown) instead of or together with the receiver 22.

  The voice control unit 34 processes a signal input from the microphone 12 according to the control of the CPU 30 and outputs the processed signal to the communication control unit 31. The communication control unit 31 performs predetermined processing on the signal supplied from the audio control unit 34 and outputs the processed signal from the antenna 33.

  The memory 35 includes, for example, a working memory and is used for arithmetic processing by the CPU 30. Further, the control voltage when tuning the oscillator 32 to a certain frequency or a correction value thereof is stored, and the error of the frequency output from the oscillator 32 is adjusted. Note that the memory 35 may also serve as a removable external memory.

  Here, a flow in which the mobile phone 1 captures a signal from a base station that performs location registration and transitions to a standby state will be described. Note that the mobile phone 1 and the base station will be described as adopting the CDMA2000_1x system as a communication system.

  First, the CPU 30 sequentially measures the electric field strength of acquisition pilot channels around each of a plurality of frequencies in accordance with a list having frequency information that can be handled by the CPU 30. Here, when an electric field strength of a predetermined level or more is detected, the CPU 30 captures a pilot channel at this frequency as a standby frequency channel.

  Subsequently, the CPU 30 establishes synchronization by matching the timing with the PN code obtained from the captured pilot channel. At this time, as shown in FIG. 3, the ideal frequency (for example, 871.1100 MHz for channel number 37) may be slightly deviated from the frequency that is actually acquired and synchronized. is there. Therefore, the CPU 30 stores the amount of deviation as an offset value. Since the oscillator 32 of the mobile phone 1 has an error due to aging or temperature change, the frequency is adjusted by correcting the control voltage with the offset value in this way.

  Next, the CPU 30 receives the synchronization channel, and acquires a synchronization channel message including system broadcast information such as base station information and channel configuration. The channel number of the paging channel for standby is specified in the synchronization channel message, and is normally operated so as to be the same as the pilot channel and the synchronization channel. Then, the communication control unit 31 tunes the frequency of the oscillator 32 to the paging channel based on the channel number specified by this synchronization channel message. At this time, the communication control unit 31 corrects an error due to aging or temperature change of the oscillator 32 by using the offset value, and matches the frequency of the paging channel with high accuracy.

  The channel number is given a different value for each base station in the neighboring area. In this sense, the channel number is identification data for identifying the base station only in the specific area. It can be said that. In addition, a non-overlapping value is given between neighboring base stations, and this value also means a time offset amount used for code synchronization by a PN code when each channel is despread. Thus, as identification data for specifying a channel, a channel number, a value for identifying a base station, a PN code, or a value that can be taken as a temporal offset amount between base stations of a PN code is a synchronization channel message. Included.

  As shown in FIG. 4, each frequency channel may generate a plurality of spurious radio waves (unnecessary radio waves) at a frequency separated from the original frequency by a predetermined interval (1.2288 MHz interval). For example, although channel number 37 (37CH) is defined as “871.1100 MHz”, spurious radio waves are generated at positions separated by a multiple of “1.2288 MHz”, and at a position four times “876.0252 MHz” It becomes.

  When acquiring the above-described pilot channel, the vicinity (for example, 10 kHz width) of an ideal frequency (for example, 2016.0300 MHz for 201CH) is tracked. Then, a spurious radio wave of a channel different from the target channel may be captured because it falls within this tracking width.

  Specifically, as shown in FIG. 5, the 37CH spurious radio wave (876.0252 MHz) and 201CH (876.0300 MHz) are not different from each other by “4.8 kHz”, so the communication control unit 31 tracks 201CH. In this case, if the electric field strength of 201CH is low, 37CH spurious radio waves are captured. Then, synchronization with this spurious radio wave is established, and as a result of acquiring the synchronization channel message, the oscillator 32 is tuned to acquire the 37CH paging channel. At this time, since the communication control unit 31 erroneously recognizes the spurious radio wave shifted by “4.8 kHz” as 201CH, the communication control unit 31 shifted from the original frequency (871.1100 MHz) of 37CH based on the offset value. Attempt to receive paging channel at location. As a result, the communication control unit 31 fails to acquire the paging channel and cannot transition to the standby state.

  In order to avoid a state in which it is impossible to transition to the standby state by capturing the spurious radio wave in this way, the CPU 30 executes the following processing.

  FIG. 6 is a diagram showing a table storing spurious radio wave determination information according to the present embodiment. The CPU 30 stores in the memory 35 the cause of failure in receiving the paging channel and the number of failures for each cause in association with the channel number that captured the pilot channel.

  Further, the CPU 30 determines that the captured pilot channel is a spurious radio wave and updates the spurious flag to “1” when the number of consecutive failures of a predetermined failure cause (for example, “channel lost”) reaches a threshold value. To do.

  For the frequency channel determined to be spurious radio waves, the CPU 30 discards the offset value adjusted at the time of acquisition and sets the default value. As a result, the communication control unit 31 can track the vicinity of the original frequency of the paging channel, thereby avoiding channel loss due to the influence of spurious radio waves.

  7 and 8 are a series of flowcharts showing the flow of processing of the CPU 30 according to the present embodiment. Here, the flow from the start of acquisition of the pilot channel to the transition to the standby state is shown.

  In step S <b> 1, the CPU 30 determines whether acquisition has failed a certain number of times for all the frequency channels supported by the mobile phone 1. If this determination is YES, since it is not possible to transition to the standby state using any frequency channel, it is determined that the state is out of service and the mode is switched to the power saving mode. On the other hand, if the determination is NO, the process proceeds to step S2.

  In step S2, the CPU 30 sets the control voltage value of the oscillator 32 to a value stored in the memory 35, and corrects the oscillation frequency error.

  In step S <b> 3, the CPU 30 tunes the oscillator 32 to the frequency of the next candidate frequency channel by the communication control unit 31 and starts acquiring the pilot channel around this frequency.

  In step S4, the CPU 30 determines whether or not the pilot channel has been successfully acquired in step S3. If this determination is YES, the process proceeds to step S5. On the other hand, if the determination is NO, the process returns to step S1 in order to attempt acquisition of another frequency channel.

  In step S5, the CPU 30 temporarily stores the channel number of the pilot channel acquired in step S4.

  In step S6, the CPU 30 captures the synchronization channel with the channel number temporarily stored in step S5 (the same frequency as the captured pilot channel), and starts receiving the synchronization channel message.

  In step S7, the CPU 30 determines whether or not the synchronization channel message has been successfully received in step S6. If this determination is YES, the process proceeds to step S8. On the other hand, if the determination is NO, the process returns to step S1 in order to attempt acquisition of another frequency channel.

  In step S8, the CPU 30 determines whether or not the frequency channel when reception is successful in step S7 is a spurious channel. Specifically, it is determined whether or not the spurious flag is “1” by referring to the determination information stored in the table of FIG. If this determination is YES, the process proceeds to step S10, and if the determination is NO, the process proceeds to step S9.

  In step S9, since the captured pilot channel and synchronization channel are not spurious radio waves, the CPU 30 updates the control voltage value of the oscillator 32 and prepares for tuning to the designated paging channel.

  In step S10, since the captured pilot channel and synchronization channel are determined to be spurious radio waves, the CPU 30 does not update the control voltage value of the oscillator 32 and avoids an unnecessary offset that causes channel loss.

  In step S11, the CPU 30 decodes the synchronization channel message acquired in step S7, and starts receiving the designated paging channel.

  In step S12, the CPU 30 determines whether the paging channel has been successfully received in step S11. If this determination is YES, the process proceeds to step S19. On the other hand, if the determination is NO, there is a possibility that the pilot channel and the synchronization channel were spurious radio waves, so the process proceeds to step S13 for the determination.

  In step S13, the CPU 30 identifies the cause of paging channel acquisition failure in step S12, and stores the channel number and the number of failures for each failure cause (see FIG. 6).

  In step S <b> 14, the CPU 30 determines whether or not the number of failures stored in step S <b> 13 has exceeded a threshold regarding a predetermined cause of failure (for example, “channel lost”). Here, the accuracy is further improved by determining whether or not the number of consecutive failures exceeds a threshold value. If this determination is YES, it is determined that the reception failure of the paging channel is due to the capture of spurious radio waves, and the process proceeds to step S15. On the other hand, if the determination is NO, since it cannot be determined that the paging channel reception failure is due to spurious radio waves, the process returns to step S1 (FIG. 7).

  Although it may be determined whether the number of times including the past history has exceeded the threshold, it is preferable to determine whether the number of consecutive times has exceeded the threshold. That is, if the past history indicates that the paging channel has been successfully received even once, it cannot necessarily be determined as a spurious radio wave.

  In step S15, the CPU 30 determines that the captured pilot channel and synchronization channel are spurious radio waves, and stores the above-described spurious flag as “1” in the determination information (see FIG. 6).

  In step S16, since it is determined that the captured pilot channel and synchronization channel are spurious radio waves, the CPU 30 discards the control voltage value of the oscillator 32 and changes it to a default value.

  In step S17, the CPU 30 cancels an unnecessary offset based on the control voltage value of the oscillator 32 changed in step S16, and starts receiving the paging channel again.

  In step S18, the CPU 30 determines whether the paging channel has been successfully received in step S17. If this determination is YES, the process proceeds to step S19. On the other hand, if the determination is NO, the paging channel cannot be received from the acquired synchronization channel message and the transition to the standby state cannot be made, and the process returns to step S1.

  In step S19, the CPU 30 updates the control voltage value by the adjustment amount of the oscillator 32 when the paging channel is successfully received in step S18, and transitions to the standby state. This improves the accuracy at the next tuning.

  FIG. 9 is a flowchart showing a processing flow of the CPU 30 according to the present embodiment. Here, paging channel reception processing in the intermittent standby state is shown. The intermittent standby state is a state in which the paging channel reception and the power saving mode (reception stop) are repeated.

  In step S21, the CPU 30 determines whether or not the reception is successful when the reception of the paging channel is started from the power saving mode. If this determination is YES, the process proceeds to step S22. On the other hand, when the determination is NO, the process returns to the flowchart of FIG. 7 to start capturing other frequency channels.

  In step S22, the CPU 30 updates the control voltage value by the adjustment amount of the oscillator 32 when the paging channel is successfully received in step S21, and transitions to a standby state.

  As described above, according to the present embodiment, an inappropriate control voltage value for the oscillator 32 can be discarded even if a spurious radio wave is captured when the pilot channel is captured. As a result, a situation in which the paging channel cannot be captured can be avoided.

<Second Embodiment>
Hereinafter, a second embodiment which is an example of a preferred embodiment of the present invention will be described. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted or simplified.

  FIG. 10 is a diagram illustrating a procedure for updating the control voltage of the oscillator 32 according to the present embodiment. For comparison, the case (a) of the first embodiment and the case (b) of the second embodiment are shown.

  In the first embodiment, when the captured frequency channel is determined to be a spurious radio wave and the correction value related to the control voltage of the oscillator 32 is discarded, it is changed to a default value stored in advance and attempts to receive the paging channel.

  On the other hand, in the second embodiment, a buffer (temporary storage area) is further provided, and the oscillator 32 is corrected by the value stored in the buffer. The buffer stores a correction value when the paging channel has been successfully received before, and attempts to receive the paging channel based on the past success record. When the control voltage of the oscillator 32 is changed by the buffer value, the buffer is changed to a default value. Therefore, if the paging channel reception still fails, the control voltage of the oscillator 32 is then changed to the default value and retried.

  FIG. 11 is a flowchart showing a process flow of the CPU 30 according to the present embodiment. Step S16 of the first embodiment (FIGS. 7 and 8) is replaced with steps S31 to S32, and step S33 is added. Note that description of steps common to the first embodiment is omitted.

  In step S31, since it is determined that the captured pilot channel and synchronization channel are spurious radio waves, the CPU 30 discards the control voltage value of the oscillator 32 and changes it to the buffer value.

  In step S32, since the buffer value is used in step S31, the CPU 30 sets this buffer to the default value and prepares for the case where reception of the paging channel fails.

  In step S33, the CPU 30 also stores the control voltage value of the oscillator 32, which has been successfully received in the paging channel and updated in step S19, in the buffer. Thereby, the process of step S31-S32 is enabled.

  FIG. 12 is a flowchart showing the flow of processing in the intermittent standby state of the CPU 30 according to the present embodiment. Step S41 is added to the first embodiment (FIG. 9). Note that description of steps common to the first embodiment is omitted.

  In step S41, the CPU 30 also stores the control voltage value of the oscillator 32, which has been successfully received in the paging channel and updated in step S22, in the buffer. Thereby, the process of step S31-S32 (FIG. 11) is enabled.

  As described above, according to the present embodiment, the control voltage value of the oscillator 32 when the paging channel is successfully received is stored in the buffer. As a result, when an inappropriate control voltage value is discarded along with the capture of spurious radio waves, a retry can be made based on the previous success record.

  As mentioned above, although embodiment of this invention was described, this invention is not restricted to embodiment mentioned above. The effects described in the embodiments of the present invention are only the most preferable effects resulting from the present invention, and the effects of the present invention are limited to those described in the embodiments of the present invention. is not.

  In the above-described embodiment, when the paging channel is successfully received, the control voltage value of the oscillator 32 is immediately updated. However, the present invention is not limited to this. For example, it may be updated and stored when the paging channel is successfully received a predetermined number of times. In this case, the correction value that can be received more stably is stored, so that the transition to the standby state can be made more reliably.

1 Mobile phone (wireless communication device)
DESCRIPTION OF SYMBOLS 11 Operation part 12 Microphone 21 Display part 22 Receiver 30 CPU (control means)
31 Communication control unit (communication means)
32 Oscillator 33 Antenna 34 Audio control unit 35 Memory (storage means)

Claims (8)

An oscillator capable of correcting the oscillation frequency;
By capturing any one of a plurality of frequency-divided acquisition channels and receiving the standby channel specified by the acquisition channel based on the acquired acquisition channel signal A communication means for transitioning to a communication standby state;
When acquiring the acquisition channel or the standby channel by the communication means, the oscillation frequency of the oscillator is automatically corrected, and the correction amount of the oscillator is sequentially updated with the correction value based on the correction. Control means;
Even if the communication means succeeds in capturing a predetermined capturing channel, it is impossible to receive a standby channel based on the signal of the capturing channel, and it is impossible to transition to the standby state. Storage means for storing identification data based on the signal of the acquisition channel,
When receiving the standby channel specified by the identification data stored in the storage unit, the control unit does not update the correction amount with the correction value of the oscillator at the time of acquisition of the acquisition channel. Control,
A wireless communication apparatus. The storage means performs the storage of the identification data when a predetermined number of times that the transition to the standby state cannot be made based on the captured acquisition channel signal occurs.
The wireless communication apparatus according to claim 1. The storage means performs the storage of the identification data when a predetermined number of times that the transition to the standby state cannot be made continuously based on the captured acquisition channel signal is performed.
The wireless communication apparatus according to claim 2. The control means, when acquiring the signal of the acquisition channel specified by the identification data stored in the storage means, controls not to update the correction amount by the correction value of the oscillator at the time of acquisition. To
The wireless communication device according to claim 1, wherein the wireless communication device is a wireless communication device. If the control unit succeeds in receiving the standby channel based on the signal of the acquisition channel acquired by the communication unit, the control unit updates the correction amount by the correction value of the oscillator at the time of reception of the standby channel. Control to do,
The wireless communication device according to claim 1, wherein the wireless communication device is a wireless communication device. The control means includes
The correction amount is updated with the correction value of the oscillator when the communication unit successfully receives the standby channel, and the correction value of the oscillator is also held in a predetermined temporary storage area.
If the acquisition channel specified by the identification data stored in the storage means is acquired and the standby channel based on the signal of the acquisition channel is received, if reception of the standby channel fails, Updating the correction amount of the oscillator using the correction value held in the temporary storage area, and causing the communication means to capture the standby channel;
The wireless communication apparatus according to claim 1, wherein the wireless communication apparatus is a wireless communication apparatus. The acquisition channel is a pilot channel in the CDMA2000_1x scheme, and the standby channel is a paging channel in the CDMA2000_1x scheme that is acquired using identification data included in a synchronization message obtained from the pilot channel signal.
The wireless communication device according to claim 1, wherein the wireless communication device is a wireless communication device. The identification data is either a value for identifying a base station, a channel number, a PN code, or an offset value between base stations of a PN code.
The wireless communication apparatus according to claim 7.

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