JPH04354431A - Portable telephone system - Google Patents

Abstract

PURPOSE:To reduce a dialing time by taking notice of that the portable telephone system is usually stopped in the case of dialing so as to reduce a time required for generating a best list remarkably. CONSTITUTION:A preceding best list is stored in a RAM 31 and the sensitivity of a current channel is detected by a level detection circuit 11, the sensitivity of the current channel and a maximum sensitivity data in the best list are compared and whether or not the portable telephone system at a preceding and a current point of time is moved based on the result of comparison. When it is judged that the telephone system is not moved, the preceding best list is adopted, and when it is judged that the telephone system is moved, a CPU 29 controls the telephone system to process the generation of the best list.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile telephone device.

0002

2. Description of the Related Art FIG. 2 is a block diagram showing the general configuration of a cellular analog mobile phone. To explain the configuration of this mobile phone along with its operation, first, on the receiving side, a high frequency signal input from an antenna (hereinafter referred to as an RF signal) is extracted by a splitter 1, where only the input received RF signal is extracted. The signal is amplified by an RF amplifier 2 connected to a wave generator 1. A tuning VCO (voltage controlled oscillator) 25 sets a frequency division ratio using a variable frequency divider 26 based on a control signal from the CPU 29 . By using this frequency division ratio, a phase comparator 27 compares and controls the phase of a clock signal from a TCXO (temperature compensated crystal oscillator) 28, thereby producing a reference clock as a frequency synthesizer. This reference clock and the RF signal from the RF amplifier 2 are connected to the first MI
Mixing is done in X circuit 3, and only the difference in the frequency spectrum generated using the non-linear part of the transistor is processed by BPF.
(Bandpass filter) It is designed to be taken out through a circuit 4. This extracts the first intermediate frequency.

Next, a constant clock is generated using the TCXO 28 or another oscillation circuit, and this clock and the first intermediate frequency are transferred to the second MIX circuit 5 using the method of extracting the first intermediate frequency described above. Mixing is performed in a similar manner, and the second intermediate frequency is extracted through the BPF circuit 6. This second intermediate frequency signal is transmitted to the limiter DET circuit 7.
Detect and demodulate while limiting the band. After this processing, the audio signal portion is extracted by the audio band BPF circuit 8. The audio signal (compressed on the transmitting side of the other device) is expanded by an expander circuit 9, and an audio processing circuit 10 performs amplification processing, impedance conversion, etc. to create a signal that can be supplied to speakers, earphones, etc. is executed and output to the handset.

Furthermore, after detection and demodulation, digital data such as messages passes through an LPF (low pass filter) 12 to cut high frequency components, and is processed by a gate array, a DSP (digital signal processor), etc. by a control signal from the CPU 29. Bit synchronization of the data is achieved in the bit synchronization circuit 13, and further processing such as decoding and error correction is performed via the decoding circuit 14. Next, these data are stored in the RAM 31 through the CPU 29, and the CPU 29 performs processing based on the stored data (messages, etc.).

On the other hand, on the transmitting side, the audio signal emitted by the user is converted into an electrical signal by an audio processing circuit 16, compressed by a compressor circuit 17, and then compressed by a limiter BPF circuit 18. limited. In addition, regarding digital data such as messages,
Code conversion and error correction are performed in the code circuit 15 by using various tables in the RAM 31 under control from the PU 29. Further, regarding analog data, there is a monitoring tone, which is regenerated by the encoding circuit 15 using the receiving side tone. These data are LP
Bandwidth is limited through the F circuit 23. Note that the DTMF signal will also be sent out via a similar route. The audio and data are modulated by a modulator 19, and further mixed with a signal from a VCO 25 according to a set channel in a MIX circuit 20. Then, only the necessary frequency components are extracted by the BPF circuit 21, further power amplified by the power amplifier circuit 22, and only the output part by the duplexer 1 is efficiently transmitted through the antenna.

[0006] The display processing circuit 32 uses LED or LC.
The automatic power control circuit 24 is a circuit that controls display elements such as D, and the auto power control circuit 24 is a circuit that changes the output level according to message data from the station. Further, the level detection circuit 11 is a circuit for detecting the receiving sensitivity level of each channel when creating a best list, which will be described later.

FIG. 3 shows an overview of the processing performed in the mobile phone device, including power-on processing (L1),
Initialization processing (L2), paging channel selection processing (
L3), idle processing (L4), page response processing (L5)
), standby processing (L6), origination processing (L7)
, order response processing (L8), conversation processing (L9), cancellation processing (L10), deactivation processing (L11), and autonomous registration processing (L12).

[0008] The specific contents of the power-on processing (L1) etc. are as follows.
As shown in FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8, FIG. 9, and FIG. 10, in the initialization process (L2), paging channel selection process (L3), etc. Best list creation processing is performed. Since the mobile phone is a mobile device, this is done so that the mobile phone itself can check whether it is on each cell or not, and it tunes the channel to the maximum sensitivity point based on the best list. (Patent application published 1986-50152)
(See Publication No. 8).

[0009]

[Problem to be Solved by the Invention] However, for example, in a cellular analog mobile phone, there are usually 20 or more control channels.
Also, it takes about 20ms for the PLL (phase-locked loop) to lock after changing channels, so it takes 400ms to scan all channels.
You will need more than that.

[0010] The present invention focuses on the fact that the mobile phone device is normally in a stopped state when making a call, and can significantly shorten the time required to create a best list, thereby reducing the time required for making a call. The purpose is to provide a mobile phone device.

[0011]

[Means for Solving the Problems] A mobile phone device according to the present invention includes means for holding the previous best list, means for detecting the sensitivity of the current channel or some channels from the top order, and the sensitivity of the current channel. means for comparing the maximum sensitivity data in the best list with the maximum sensitivity data in the best list, or comparing the sensitivities of some channels from the top order with some corresponding sensitivity data in the best list; A means for determining whether the mobile phone device has moved between the current time and the previous best list is adopted when it is determined that the mobile phone has not moved, while a best list creation process is performed when it is determined that the mobile phone has moved. It is characterized by having the means to do so.

0012

[Operation] According to the above configuration, instead of scanning all channels from the start, it scans the channel that had the highest sensitivity in the previous best list (i.e., the current channel) or some channels from the top. Sensitivity is first detected, and by comparing this detection result with the previous best list, it is determined whether or not movement has occurred in the mobile phone device, and it is determined that no movement has occurred (including cases where movement is slight). Sometimes we use the previous best list, so
When making a call, etc., the calling operation can be performed in a shorter time than scanning all channels, and the time required for making a call, etc. can be shortened. Furthermore, since message sequences such as overhead messages can be received without interruption, there is also the excellent advantage of faster response times.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 10. Note that FIGS. 2 to 10 shown in the conventional example will be used again here. As shown in FIG. 2, the mobile phone device according to the present invention has the same circuit configuration as before, including a duplexer 1, an RF amplifier 2, a first M
IX circuit 3, BPF circuit 4, second MIX circuit 5, BPF
circuit 6, limiter DET circuit 7, expander circuit 9,
Audio processing circuit 10, level detection circuit 11, LPF circuit 1
2. Bit synchronization circuit 13, decoding circuit 14, code/tone circuit 15, audio processing circuit 16, compressor 17, limiter BPF circuit 18, modulator 19, MIX circuit 20, B
PF circuit 21, power amplifier circuit 22, LPF circuit 23
, APC circuit 24, VOC circuit 25, variable frequency divider 26,
Phase comparator 27, TCXO circuit 28, CPU 29, RO
It is configured with an M30, a RAM 31, a display processing section 32, and an input processing section 33, and basically performs operations such as audio processing similar to those described in the past, and the basic operations of the CPU 29 are also similar to those shown in FIG. , 4, 5, 6, 7, 8, 9, and 10.

[0014] The difference from the conventional method is that the previous best list is RA
In addition to configuring the data to be stored in M31, initialization processing (
In the best list creation process performed in L2), paging channel selection process (L3), etc., one of the three processes shown in FIG. 1 is performed. That is,
First, the first process is to detect the reception sensitivity level of the current channel (S1), and compare the highest sensitivity data in the previous best list with the reception sensitivity level of the current channel (S1).
2). In this step 2, if the result is that the reception sensitivity level of the current channel and the highest sensitivity data of the previous best list differ beyond a certain tolerance range, the mobile phone device will be moved. It is determined that
Executing the process of accessing all channels and creating a best list (S3), and moving to the next step, while if the difference is within the above-mentioned tolerance range, it is determined that no movement has occurred in the mobile phone device, The previous best list is used as is (S4) and the process moves to the next step.

[0015] In the second process, the sensitivities of several channels from the top in the order of the previous best list are first detected (S11), and it is determined whether the sensitivity order of these detected channels is the same as the order of the previous best list. (S12). In this step 12, if the result is that the order is different (switched), it is determined that the mobile phone device has moved, and a process is executed to access all channels and create a best list (S13). , and proceed to the next step. If the order is the same, it is determined that no movement has occurred in the mobile phone device, and the previous best list is used as is (S14), and the process proceeds to the next step. Transition.

The third process is a combination of the first and second processes described above, and after performing the same detection process as in step 11 (S21), the detected channels are sorted in order of sensitivity. and the previous best list order are the same, and whether there is a difference between the receiving sensitivity level of each channel and the corresponding sensitivity data of the previous best list beyond the permissible range. We also make judgments about (
S22) Based on both of the above judgments, it is determined whether the mobile phone device has moved or not, and either the previous best list is adopted as is or the best list is re-created. It is.

According to the above configuration, instead of scanning all channels from scratch, it scans the channel that had the highest sensitivity in the previous best list (that is, the current channel) or some channels from the top. Sensitivity is first detected, and by comparing this detection result with the previous best list, it is determined whether or not the mobile phone device has moved. When it is determined that no movement has occurred, the previous best list is adopted. Therefore, when there is no movement such as when making a call, the calling operation can be performed in a shorter time than scanning all channels, and the time required for making a call can be shortened. Additionally, since message sequences such as overhead messages can be received without interruption, there is also the advantage of faster response times.

In particular, according to the first process, if it is determined that the mobile station is not moving, there is no need to change the channel, so the channel scan time can be set to approximately 0 and the calling operation can proceed. In addition, in the second and third processing, if it is determined that it is not moving, for example, if about 5 channels are scanned in the order of the top, 100
This means that the time required is about ms, compared to the conventional 400 m.
s, the time can be reduced by about 300 ms. Further, according to the third process, it becomes possible to accurately determine the movement of the mobile phone device.

[0019]

[Effects of the Invention] As described above, according to the present invention, the overall processing time can be significantly shortened by shortening the time required to create a best list in work that is stopped such as making a call. Additionally, messages such as overhead messages can be received without interruption, resulting in faster response times.

[Brief explanation of drawings]

FIG. 1 is a flowchart showing the contents of processing performed when creating a best list in a mobile phone device as an embodiment of the present invention.

FIG. 2 is a block diagram showing a general configuration of a mobile phone device.

FIG. 3 is a flowchart showing an overview of general processing of a mobile phone device.

FIG. 4 is a flowchart showing specific details of the process in FIG. 3;

FIG. 5 is a flowchart showing specific details of the processing in FIG. 3;

FIG. 6 is a flowchart showing specific details of the processing in FIG. 3;

FIG. 7 is a flowchart showing specific details of the processing in FIG. 3;

FIG. 8 is a flowchart showing specific details of the processing in FIG. 3;

FIG. 9 is a flowchart showing specific contents of the process in FIG. 3;

FIG. 10 is a flowchart showing specific details of the processing in FIG. 3;

[Explanation of symbols]

11 Level detection circuit 29 CPU 31 RAM

Claims (1)

[Claims] 1. Means for holding the previous best list; means for detecting the sensitivity of the current channel or some channels from the top order; and comparing the sensitivity of the current channel with the maximum sensitivity data in the best list; means for comparing the sensitivities of some channels from the top with some corresponding sensitivity data in the best list; a means for determining whether the mobile phone has moved, and a means for employing the previous best list when it is determined that the mobile phone has not moved; and a means for creating a best list when it is determined that the mobile phone has moved. Device.