JP2654288B2 - Mobile phone equipment - Google Patents

Abstract

PURPOSE:To provide a portable telephone equipment capable of transferring to a waiting, paging or communication state by quickly synchronizing with an adaptive system having maximum electric field by means of intensity of the electric field and control data of the channel stored without repeating retrieval of the maximum point of the electric field when power is restored after once turning off the power supply. CONSTITUTION:The data of synchronization just before the power-off and of a control channel in a best list are stored in a non-volatile memory 23 within a CPU block. After the restoration of the power, by first synchronizing the equipment with this control channel and receiving message data, the positional movement between the power-off time and the power restoration time is judged depending on the presence or absence of an error and the operation is continued when it is judged that there is no movement, or a best list preparation processing is performed when it is judged that movement is made.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device, and more particularly to a portable telephone by radio communication and a portable telephone in an area.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a general cellular type analog portable telephone. Hereinafter, the configuration of this mobile phone will be described together with its operation. First, the receiving operation will be described. A high-frequency signal (hereinafter referred to as R
F (radio frequency) signal)
, Only the input received RF signal is extracted and amplified by the RF filter and the RF amplifier 1. VCORX for tuning (received voltage controlled OSC)
illator) 7 is a TCXO (temperatu)
re compensated crystal os
and a PLL (phase locked) according to a control signal from the CPU 23.
loop) A signal from the frequency synthesizer (variable frequency divider) 9 is received to generate a reference clock signal. The reference clock signal and the RF signal from the RF amplifier 1 are mixed by the first MIX circuit 2, and only the difference of the frequency spectrum generated using the non-linear portion of the transistor is extracted through the 1F filter and the 1F amplifier circuit 3. Thereby, the first intermediate frequency is extracted.

[0003] Next, using a TCXO or another oscillator circuit, a VCOIF (VCO intermediate) is used.
(frequency) 8 to generate a constant clock signal, and connect this clock signal and the first intermediate frequency to the second M
In the IX circuit 4, mixing is performed in the same manner as in the above-described first intermediate frequency extraction, and an IF filter, an IF
The second intermediate frequency is extracted through the amplifier circuit 5. The second intermediate frequency signal detection circuit 6 detects and demodulates the signal while limiting the band. After this processing, the audio signal portion is converted to an LPF (low-pass filter) circuit 1 of the audio band.
7 will be taken out. The audio signal (compressed on the transmitting side of the other device) is expanded by an audio expansion circuit 18 and amplified by an audio processing line control circuit 15 to amplify the signal so that it can be supplied to a speaker, an earphone, or the like. Conversion and the like are performed and output to a speaker and a ringer.

[0004] Digital data such as a message is subjected to BPF (band-pass filter, ba
The high-frequency component is cut by passing through an nd-pass filter 19, and is decoded and error-corrected by a control signal from the CPU 23 through a data demodulation circuit 20 including a gate array, a DSP (digital signal processor), and the like. Are performed. Next, these data are stored in a memory (R
AM), and the CPU 23 performs a process based on the stored data (such as a message).

Next, the transmission operation will be described. The audio signal from the microphone emitted from the user is converted into an electric signal by the audio processing line control circuit 15 and further compressed by the audio compression circuit 14. For digital data such as messages, code conversion and error correction are performed in the data modulation circuit 21 by using various tables in a memory (RAM) under the control of the CPU 23. The analog data has a monitoring tone, and the modulation circuit 21 uses the tone on the receiving side to amplify or regenerate the analog data as it is. Note that DT
The MF signal is also transmitted via the same route. The voice and data are modulated by the modulation MIX circuit 12, and further mixed with a signal from the VCOTX 11 according to the set channel. Then, only the necessary frequency components are extracted by the RF filter RF amplifier circuit 13, further power-amplified by the power amplifier, and then only the output is efficiently transmitted through the antenna.

The display processing circuit 24 includes an LED or an LC.
This is a circuit for controlling display elements such as D and controlling keys. The DTMF and melody generating circuit 22 operates under the instruction of the CPU 23. Level detection circuit 1
0 is for detecting the reception sensitivity level of the electric field of each channel when creating the best list (list arranged in the descending order of the electric field sensitivity level of a given reception control channel).

FIG. 4 shows an outline of the processing performed in the portable telephone device. Under the control of the CPU 23, a power-on processing L1, an initialization processing L2, a paging channel selection processing L3, an idle processing, a page response Processing, order, response waiting processing, origination processing, order response processing, conversation processing, conversation cancellation processing, output stop system determination processing, voluntary registration processing, and handoff processing are performed.

The specific contents from the power-on processing L1 to the idle processing are as shown in FIG. 5, and the initialization processing L2
In the paging channel selection processing L3, etc.,
Under the instruction of the CPU 23, a best list creation process is performed. Since the mobile phone is a mobile object, the mobile phone itself checks whether or not it is in each cell (area in charge of the base station). It tries to capture data by matching channels from the point. Note that the above processing and flow are techniques widely used in the mobile phone device, and therefore, description of the purpose, contents, and the like will be omitted.

[0009]

However, in a general portable telephone using conventional wireless communication, there is an operation of obtaining a best list as shown in a flowchart of FIG.
By the way, the control channel usually has 20 or more channels in a cellular analog mobile phone, and the channel is moved by 20 m per channel until the PLL (phase locked loop) is locked by moving the channel.
It takes about s time, and it takes 400 ms or more to scan all the channels. For this reason, the call is temporarily stopped and the power is cut off for the reason that the battery is cut off during the call, and thereafter, the power is restored by replacing the battery or the like, and the user performs a new call operation to resume the call. In some cases, for example, the user has already started the push button operation for calling before the scanning of all the channels has been performed, which may cause inconveniences such as redoing the calling operation, making a wrong call, and the like. The present invention focuses on the fact that, when the power is turned on and off, the mobile phone is usually located at substantially the same point, stops the work on the best list, and shortens the preparation time before calling and receiving a call. It was made for the purpose of providing a mobile phone that obtains.

[0010]

In order to achieve the above object, in a portable telephone device capable of communicating with a plurality of telephones and transmitting and receiving control data by wireless communication separately from a general public telephone line according to the present invention, The electric field detecting means for detecting the strength of the electric field and the electric field strength of the channel immediately before the power is turned off based on the information from the electric field detecting means and the information on the control data from the communication control means immediately before the power is turned off, despite the power off. The non-volatile raw storage means for storing the data and the information on the electric field strength and the control data stored in the non-volatile storage means at the time of power recovery use the maximum electric field without repeating the search for the maximum point. It has control means to quickly tune to the adaptation system with the strength of the electric field and to enter standby, page, and call. It is characterized in that.

[0011]

With the above arrangement, in the portable telephone device according to the present invention, when the power is restored after the power is once turned off, the electric field of the channel stored in the non-volatile storage means immediately before the power is turned off. Based on the information on the strength and the control data, the control means can quickly tune to the adaptive system having the maximum electric field strength without repeating the search for the maximum point of the electric field, and enter standby, page, and call.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A portable telephone device according to the present invention will be described based on embodiments. FIG. 1 is a circuit configuration diagram of an embodiment of a mobile phone device according to the present invention, which is basically the same as that according to the prior art. Therefore, the same reference numerals are given to the same constituent circuits as those according to the related art, and description thereof will be omitted.

The difference is that the CPU 23 has a built-in nonvolatile memory 23a whose contents are not erased even when the power is turned off. Furthermore, basic flows such as initialization processing and paging channel selection processing, and these flows are
The same applies to the control of the PU 23 and the instruction under the instruction. Therefore, the processing flow diagram of the mobile phone device according to the conventional technique shown in FIG. 4 can be applied to the mobile phone device according to the present invention as it is. However, the best list creation processing performed in the initialization processing, the paging channel selection processing, and the like is different.

Further, differences in these circuit configurations and processing contents,
That is, it is needless to say that programs and the like built in the CPL 23 for performing the functions according to the present invention have been subjected to necessary improvements. Next, the flow of the best list creation processing according to the present invention will be described with reference to FIG. This figure corresponds to FIG. 5 which shows a processing flow of initialization and page channel selection in a portable telephone device according to the prior art. Note that the power-on process L1 is not different from that of the related art.

Next, the contents of the processing corresponding to the processing of the initialization processing L2 shown in FIG. 4 are described. First, it is checked whether or not the processing is the first initialization processing after the power is turned on (a1). . In the case of the first time, it tunes to the dedicated control channel (described later) of the data stored in the non-volatile memory as it is, synchronizes the data, and starts checking the parameter overhead message (a4). Here, if the parameter overhead message data can be captured without errors, it is considered that the power-off location and the power-on location are within the same base station (range of positional error), and the next paging channel selection process Proceed to L3. Therefore, it is possible to eliminate the task (a2) of scanning the dedicated control channel, which is indispensable for the mobile phone device according to the related art, and creating the best list (a2) and the task of synchronizing in the order of the best list (a3). Become. Next, when the power is turned off and the power is turned on next time, the CPU 23 stores the data (synchronous channel data, best list, etc.) relating to the dedicated control channel in the nonvolatile memory 2 so as to enable the above-described omission processing.
3a (a5).

Similarly, the contents of the processing corresponding to the paging channel selection processing L3 shown in FIG.
Next, it is checked whether or not it is the first paging channel selection process after the power is turned on (b1). At the same time, a check is made to see if synchronization has been achieved without taking the best list in the initialization processing. If both checks are successful, the control tunes to the paging control channel (described later) of the data stored in the non-volatile memory as it is, and starts checking the parameter overhead message by synchronizing the data (b4). Here, if the parameter overhead message data can be caught without error, the location of receiving the individual message such as the page and order of the mobile device when the power is turned off and the location of receiving the current individual message are in the same base station. (The range of the position error), and the process proceeds to the process (b6) of waiting for these signals at the next idle. Therefore, it is possible to omit the operation of scanning the paging control channel and creating the best list (b2) and the operation of synchronizing in the order of the best list (b3). Further, as in the case of the initialization, when the power is turned off and the power is turned on next time, the CPU 23 stores data (tuning channel data, best list, etc.) relating to the paging control channel so as to enable the above-described omission processing. The operation (b5) of storing the information in the nonvolatile memory 23a is also performed. As a result, once the power is turned off, the preparation time when the power is restored is greatly reduced, and the calling operation is smoothly performed.

Although the present invention has been described based on the embodiments, the present invention is not limited to the above embodiments. That is, for example, the data relating to the control channel may be written in a batch just before the power is turned off, instead of being written into the nonvolatile memory at this stage.

[0018]

As described above, according to the present invention,
After turning off the power once by replacing batteries etc.,
When power is restored, by using the past tuning control channels, it is possible to scan all control channels, take the best list, and synchronize in the order of the best list to synchronize and make calls and receive calls. It is possible to greatly reduce the time required to enter the service, and thus to prevent redoing of calls and erroneous calls.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of a mobile phone device according to the present description.

FIG. 2 is a flowchart of a process according to the present invention in the above embodiment.

FIG. 3 is a general block diagram of a mobile phone device according to the related art.

FIG. 4 is a flowchart showing an outline of a general process of the mobile phone device.

FIG. 5 is a flowchart of a general operation up to idle of the mobile phone device.

[Explanation of symbols]

 10 Level detection circuit 23 CPU 23a Non-volatile memory

Claims (1)

(57) [Claims] An electric field detecting means for detecting the intensity of an electric field of a channel in a mobile telephone device capable of communicating with a plurality of telephones and transmitting and receiving control data by wireless communication separately from a general public telephone line; A nonvolatile storage means for storing the channel electric field strength immediately before power-off by information from the means and information about control data from the communication control means immediately before power-off, despite the power-off; By using the information on the electric field strength and the control data stored in the sex memory means, the search for the maximum point of the electric field is not repeated, so that it is quickly tuned to the adaptive system having the maximum electric field strength, and the standby and the page are performed. And a control means for entering a call.