JP2001186077A - Mobile communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mobile communication terminal that can reduce the reception period in the case of intermittent reception thereby reducing the current consumption furthermore. SOLUTION: A bit extract section 40 captures bits composing MSI data among output bits from a TDMA section 7 in timing designated by a timing control section 45. Storing each bit extracted by the bit extract section 40 into a register 41 extracts the MSI data. After the end of extraction of the MSI data, a comparison section 43 compares the extracted data with address data of its own station set in advance to a setting section 42 for setting data addressed to an own station to discriminate whether or not this control channel is address to its own station. A CPU immediately stops the reception when discriminating that this control channel is not addressed to its own station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a PDC (Personal
The present invention relates to a mobile communication terminal device such as a mobile phone device.

[0002]

2. Description of the Related Art In a PDC portable telephone device, after data link such as registration of its own station is terminated, intermittent reception for receiving every 720 ms is performed for the purpose of reducing current consumption.

During this intermittent reception, the broadcast channel (B) arriving at a rate of one frame (20 ms) every 720 ms
A control channel such as CCH) or paging channel (PCH) is received, and it is checked whether there is any information addressed to the own station, such as an incoming call notification.

When information addressed to the own station arrives, a process according to the content of the arrived information, such as executing a communication start procedure, is started. However, if the information addressed to the own station has not arrived, the intermittent reception is continued.

[0005] In the PDC system, transmission data in a radio section is interleaved.

That is, the interleaving of the PDC system targets 160 bits in one frame. The 160-bit data is divided into continuous 10 bits, and a CRC code is added to each of the 10 bits.

The data obtained by adding a CRC code to these 160 bits is developed in a memory or the like in the writing order as shown in FIG.
The interleaved data shown in FIG. 6 is obtained by reading in the read order shown in FIG. 5 and 6, D (10), D (11)
, D (169) are the first, second,..., 160th bit, respectively. Also,
What is indicated as CK (4) is a CRC code.

Therefore, in order to confirm whether or not the data of the control channel received by the PDC portable telephone apparatus is addressed to the own station, it is necessary to deinterleave the transmission data. For interleaving, all data of one frame must be received.

For this reason, even if information addressed to the own station has not arrived, data reception for one frame must always be performed. That is, the reception period in the case of the intermittent reception cannot be shorter than one frame period.

[0010]

As described above, conventionally,
Since all data for one frame had to be received for deinterleaving, the reception period at the time of intermittent reception was at least one frame, which was the limit of current consumption reduction by intermittent reception. .

The present invention has been made in view of such circumstances, and an object of the present invention is to make it possible to shorten a reception period at the time of intermittent reception, thereby further reducing current consumption. It is to provide a possible mobile communication terminal device.

[0012]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a mobile communication system for transmitting transmission data in which a predetermined amount of data is set as one block and data included in one block is interleaved. A mobile communication terminal device that receives a predetermined control channel set for a predetermined period at predetermined intervals in a standby state and tries to acquire information addressed to the own station. Extraction means such as a bit extraction unit for extracting data constituting predetermined destination information such as MSI data from the transmission data transmitted in step (1), and all the data constituting the destination information are extracted by the extraction means. In accordance with this, it is determined whether or not the destination information indicated by the data specifies the own station. A receiving unit that stops the receiving operation before the predetermined period ends, when the destination information does not specify the own station by the determining unit, for example, by software processing of a CPU. Receiving stop means to be realized.

[0013] By adopting such means, data constituting the destination information discretely located in the transmission data before being deinterleaved is individually extracted, whereby the destination information is extracted. When all of the data constituting the destination information can be extracted, it is determined whether the destination information constituted by the data, that is, whether the extracted destination information specifies the own station, is determined. If it is determined that the station is not designated, the receiving operation is stopped before the predetermined period ends. Therefore, if the control channel received to try to acquire the information addressed to the own station is not addressed to the own station, the receiving operation is stopped while the control channel is arriving.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of a main part of a portable telephone device to which the mobile communication terminal device according to the present embodiment is applied.

As shown in FIG. 1, the portable telephone device of the present embodiment has an antenna 1, an antenna duplexer (DUP) 2, a receiving circuit (RX) 3, a synthesizer circuit (SYN) 4, and A
/ D converter 5, modem unit 6, TDMA unit 7, channel codec 8, speech codec 9, D / A converter 10, receiving amplifier 11, receiver 12, microphone 1
3, transmission amplifier 14, A / D converter 15, D / A converter 16, transmission circuit (TX) 17, control circuit 18,
It has an LCD display 19, a key unit 20, an amplifier 21, a speaker 22, an amplifier 23, a vibrator motor 24, an oscillation circuit 25, a CPU 26, a ROM 27, a RAM 28, a data determination unit 29 for own station, a battery 30, and a stabilized power supply circuit 31. are doing.

The modem unit 6, TDMA unit 7, channel codec 8, speech codec 9, control circuit 1
The ROM 27, the RAM 28, and the own-station-destined data determination unit 29 are connected to the CPU 26 via the control bus 32.

A radio frequency signal transmitted from a radio base station via a radio communication channel is received by an antenna 1, subjected to radio-to-electric signal conversion, and then input to a receiving circuit 3 via an antenna duplexer 2. You.

The radio frequency signal is first amplified in the receiving circuit 3. Subsequently, the radio frequency signal is mixed down by the receiving circuit 3 using the local signal given from the synthesizer circuit 4 and converted into an IF frequency signal. Further, this IF frequency signal is amplified by the receiving circuit 3, and then Q
Since it is a PSK signal, it is orthogonally demodulated.

The synthesizer circuit 4 generates a local signal having a frequency specified by the control circuit 18 according to the radio channel frequency, and supplies the local signal to the reception circuit 3 and the transmission circuit 17.

The IF frequency signal that has been subjected to quadrature demodulation by the receiving circuit 3 is digitized by the A / D converter 5 and then supplied to the modem unit 6.

The IF signal output from the receiving circuit 3 is subjected to delay detection by the modem unit 6, while establishing frame synchronization and detecting a color code, thereby reproducing a digital transmission signal. The reproduced digital transmission signal is output to the TDMA unit 7.

The digital transmission signal output from the modem unit 6 is separated by the TDMA unit 7 for each digital transmission signal of each time-division multiplexed channel, and only the channels to be received by the own station are extracted. . The extracted digital transmission signal is output to the channel codec 8.

The digital transmission signal output from the TDMA unit 7 is subjected to deinterleaving and error correction decoding by a channel codec 8. Thus, digital call data is reproduced from the digital transmission signal.

Digital speech data reproduced by the channel codec 8 is converted by the speech codec 9 into PSI
The received speech signal is reproduced by performing the CELP decoding process.

The received voice signal is converted into an analog signal by the D / A converter 10, amplified by the receiving amplifier 11, and supplied to the receiver 12. This allows
The receiver 12 is driven to convert the received voice signal into a sound output, and the received voice is transmitted to the user.

On the other hand, the voice uttered by the user is
In step 3, the signal is converted into an electric signal, that is, a transmission voice signal. The transmission voice signal is amplified by the transmission amplifier 14 and digitized by the A / D converter 15.

The digitized transmission voice signal is subjected to VSELP encoding processing by the speech codec 9 to be converted into digital communication data.

The digital communication data obtained by the speech codec 9 is subjected to error correction coding and interleave processing by the channel codec 8. As a result, the signal is converted into a digital transmission signal for transmitting the radio section.

The digital transmission signal obtained by the channel codec 8 is subjected to TDMA control for speed conversion and output timing so as to be inserted into a predetermined time slot on the radio line.
This is performed in the unit 7.

The digital transmission signal output from the TDMA unit 7 is added with a frame signal and a color code signal by the modem unit 6. As a result, the IF frequency signal obtained by performing the signal mapping process is D
/ A converter 16.

The IF frequency signal is converted into an analog signal by a D / A converter 16 and supplied to a transmitting circuit 17.

The IF frequency signal is first subjected to quadrature modulation in the transmission circuit 17, and further mixed up using a local signal supplied from the synthesizer circuit 4 to be converted into a radio frequency signal of a predetermined transmission frequency. Then, this radio frequency signal is amplified by the transmission circuit 17 and then supplied to the antenna 1 via the antenna duplexer 2. This allows
The radio frequency signal is transmitted from the antenna 1 as a radio wave.

Under the control of the CPU 26, the control circuit 18 controls the driving of the LCD display 19, the speaker 22 and the vibrator motor 24, controls the frequency generated by the synthesizer circuit 4, and processes the output signal of the key unit 20. .

The LCD display 19 is driven by the control circuit 18 to display an arbitrary image.

The key unit 20 receives an instruction input by a user regarding a telephone number, outgoing call, end call, character input, or function setting.

The amplifier 21 is supplied with a signal output from the control circuit 18 to drive the speaker 22 to sound a ringtone or a ringtone. The amplifier 21
This signal is amplified to a level sufficient to drive the speaker 22, and then given to the speaker 22.

The speaker 22 generates a signal given from the control circuit 18 via the amplifier 21 as a sound output, and sounds a ring tone or a ring tone to notify the user of the occurrence of the incoming call.

The amplifier 23 has a vibrator motor 24
Is supplied from the control circuit 18 to drive. The amplifier 23 amplifies this signal to a level sufficient to drive the vibrator motor 24 before giving it to the vibrator motor 24.

The vibrator motor 24 performs a vibrator operation to notify the user of the incoming call by rotating a vibrator (not shown).

The oscillation circuit 25 supplies a predetermined clock signal to the control circuit 18.

The CPU 26 operates based on an operation program stored in the ROM 27. And CPU2
Reference numeral 6 generally controls each unit of the mobile phone device so that it can function as the mobile phone device.

The ROM 27 is a flash ROM or E
It is configured using an EPROM. And this ROM
Reference numeral 27 is used to store, in addition to the operation program of the CPU 26, various information that should be kept permanently, such as melody information, image information, an individual number, or adjustment information of a wireless device.

The RAM 28 stores the setting state of the portable telephone device,
Used to store various information that should be kept in a relatively short term, such as storing a telephone number, a digitized recording signal, character information input by a user, or melody information input by a user. I do. Also this RAM
Reference numeral 28 is also used to store a detected value of the reception level by the initial scan. This RAM 28
Is backed up by a backup battery (not shown), so that the stored information can be reliably retained for a long period of time.

The digital transmission signal extracted by the TDMA unit 7 is given to the data determination unit 29 for the own station. The own-station-destined data determination unit 29 extracts the address data of the control channel from the input digital transmission signal, and based on the extracted address data, determines whether the control channel data is destined for the own station. It is determined in real time whether or not there is.

Here, the PDC system is targeted, and the data format of the received data is determined as shown in FIG. 2 according to the RCR standard. And this figure 2
, A 21-bit destination address is to be described in an MSI (address field) area. Therefore, the own-station-addressed data determination unit 29
The bits contained in the MSI are extracted.
In FIG. 2, “AC” indicates ID control, “AI” indicates ID display, “SAPI” indicates a service access point identifier, and “EA” indicates an address field extension bit.

The battery 30 is a secondary battery and generates electric power to be supplied to each section of the portable telephone device.

The stabilized power supply circuit 31 stabilizes the electric power output from the battery 30 and supplies the electric power to each section.

By the way, the control means realized by the operation of the CPU 26 based on the operation program stored in the ROM 27 is a well-known general one in a portable telephone device such as a control means for enabling a voice call. In addition to the control means, it has a reception stopping means. The reception stop means immediately responds to the reception of the control channel in the intermittent reception state by receiving a determination result indicating that the incoming data on the control channel is not addressed to the local station from the local station data determination unit 29. To stop the receiving operation.

FIG. 3 is a block diagram showing a specific example of the configuration of the own station-addressed data judging section 29.

As shown in this figure, the own-station-destined data determination unit 2
Reference numeral 9 includes a bit extraction unit 40, a register 41, a data setting unit 42 for the own station, a comparison unit 43, a bus interface 44, and a timing control unit 45.

The digital transmission signal provided from the TDMA unit 7 is input to the bit extraction unit 40. Then, the bit extraction unit 40 sets the timing T at a timing synchronized with the extraction timing signal given from the timing control unit 45.
The output of the DMA unit 7 is fetched by one bit and supplied to the register 41.

The register 41 takes in the bits given from the bit extracting section 40, and stores and stores the bits. Register 4
1 has a storage capacity of 21 bits. Then, the register 41 outputs the stored 21-bit data to the comparing unit 43 in parallel.

21-bit address data assigned to the own station is registered in the own station address data setting section 42 in advance. Then, the local station data setting unit 42 outputs the address data to the comparing unit 43 in parallel.

The comparing section 43 compares the 21 bits output from the register 41 with each bit of the address data output from the data setting section 42 for the own station at a timing synchronized with the comparison timing signal supplied from the timing control section 45. Compare individually. Then, a determination signal indicating whether or not all bits match is output to the bus interface 44.

The bus interface 44 converts the determination signal output from the comparing section 43 into notification data to the CPU 26, and outputs the data to the control bus 32 at a predetermined timing. Further, the bus interface 44 receives predetermined information such as information on reception start timing in the intermittent reception state from the CPU 26 via the control bus 32 and serves as a reference for timing determination in the timing control unit 45, and It is given to the control unit 45.

The timing control section 45 outputs a signal from the TDMA section 7 to the bit extraction section 40 at a timing at which the output is a bit constituting address data, based on information provided from the CPU 26 via the control bus 32 and the bus interface 44. Output an extraction timing signal that causes the CPU to perform bit extraction. Further, the timing control unit 45
When all of the 21 bits forming the address data have been stored in the register 41, the comparison unit 43 outputs a comparison timing signal for causing the comparison unit 43 to perform the comparison.

Next, the operation of the portable telephone device configured as described above will be described.

When in the intermittent reception state, the CPU 26
As is well known, the operation of each unit is started to receive the control channel at a timing of every 720 ms synchronized with a predetermined control channel. When the receiving operation is started in this way, the TDMA unit 7 outputs a digital transmission signal having a configuration as shown in FIG. This digital transmission signal is input to the channel codec 8 and also to the own-station-specific data determination unit 29.

In the own-station-destined data determination section 29, the digital transmission signal provided from the TDMA section 7 is input to the bit extraction section 40.

On the other hand, when such a receiving operation is performed, the timing controller 45 sets the third, fourth, eighteenth, and nineteenth bits from the head of the control channel to be received.
Bit 20, bit 24, bit 25, bit 48, bit 50, bit 51, bit 66
Bits 82, 83, 99, 114, 115, 130, 131, 145, 146, and 147 An extraction timing signal as shown in FIG. 4B for instructing extraction is output.

In the bit extracting section 40, the bits at the above-mentioned positions (the bits indicated by ○ in FIG. 4) are extracted in synchronization with the extraction timing signal. The bits at each of the above positions are D (19) to D (25) and D (27) to D (27).
(33) and 21 bits of D (35) to D (41), which are bits constituting the MSI in the data format shown in FIG. Therefore, the MSI data is extracted by the bit extraction unit 40.

The data of the MSI extracted by the bit extracting section 40 is accumulated and held in the register 41.

When the extraction of the 147th bit is completed, all 21 bits of the MSI have been extracted. Therefore, the timing control unit 45
A comparison timing signal as shown in FIG. 4C for instructing the execution of the comparison at a timing immediately after instructing the bit extraction unit 40 to extract the bit relating to the seventh bit is output.

Then, at this timing, the comparing section 43
Compares the MSI data stored in the register 41 with the address data assigned to the own station output by the own station data setting unit 42, and outputs a determination signal indicating the result of the comparison. This determination signal is transmitted to the bus interface 44
And the CPU 26 is notified via the control bus 32.

Since the MSI data is destination address data, if it is addressed to the own station, it is the address data assigned to the own station. Therefore, if the MSI data extracted and stored in the register 41 matches the address data assigned to the own station, the current control channel is addressed to the own station. But MSI
If the data does not match the address data assigned to the own station, the current control channel is not addressed to the own station.
That is, the comparison result in the comparison unit 43 is a determination result as to whether or not the current control channel is addressed to the own station.

If it is determined that the current control channel is addressed to the own station, the CPU 26 continues the receiving operation. However, if it is determined that the current control channel is not addressed to the own station, the current reception operation is immediately terminated.

As described above, in the present embodiment, M bits are extracted by extracting predetermined 21 bits from the digital transmission signal before deinterleaving by the channel codec 8.
Extract SI data. When the extraction of the MSI data is completed, the extracted MSI data is compared with the preset address data of the own station to determine whether or not the current control channel is addressed to the own station. If it is not addressed to the own station, the receiving operation is immediately stopped. Therefore, before receiving all of the 160 bits of one frame, it is determined whether or not the incoming control channel is addressed to the own station. If not, the receiving operation is stopped. Become. As a result, as long as the control channel addressed to the own station does not arrive, the period during which the receiving operation is performed can be shorter than one frame period, and the current consumption can be reduced.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the mobile communication terminal device of the present invention is applied to a PDC mobile phone device. However, the present invention is applicable to other mobile phone devices and non-voice communication terminal devices. It is possible.

In the above embodiment, the comparison is performed immediately after the extraction of the 21 bits constituting the MSI data is completed, and the receiving operation is immediately performed when the current control channel is not addressed to the own station. The stop of the comparison and the reception operation may be performed at an arbitrary timing within a range where one frame period does not end. However, the earlier the timing of stopping the receiving operation, the greater the effect of reducing the current consumption, so that it is preferable to perform the comparison and stop the receiving operation as soon as possible.

In the above embodiment, only necessary bits are extracted and stored in real time. However, for example, all bits up to the 147th bit are fetched using a shift register or the like, and only necessary bits are output. For example, the method of extracting the address data may be arbitrary.

In addition, various modifications can be made without departing from the spirit of the present invention.

[0073]

According to the present invention, a standby mode is used in a mobile communication system for transmitting transmission data formed by interleaving a predetermined amount of data into one block and interleaving data included in one block. In a mobile communication terminal device that receives a predetermined control channel set for a predetermined period at predetermined intervals and attempts to obtain information addressed to the own station, a predetermined destination information is transmitted from transmission data on the control channel. Extracting means for extracting constituent data; and, in accordance with the fact that all the data forming the destination information are extracted by the extracting means, the destination information indicated by the data specifies the own station. Determining means for determining whether or not the destination information does not specify the own station; Since reception control means for stopping the operation is provided, if the control channel received to attempt to acquire information addressed to the own station is not addressed to the own station, the reception operation is performed while the control channel is arriving. As a result, the mobile communication terminal apparatus is capable of shortening the reception period at the time of intermittent reception, thereby further reducing current consumption.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a main configuration of a mobile phone device configured by applying a mobile communication terminal device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a data format of received data.

FIG. 3 is a block diagram showing a specific example of the configuration of a self-station-addressed data determination unit 29 in FIG. 1;

FIG. 4 is a timing chart showing timings of a digital transmission signal, an extraction timing signal, and a comparison timing signal.

FIG. 5 is a diagram showing a concept of an interleaving process in the PDC system.

FIG. 6 is a diagram showing a data array after interleaving.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Antenna 2 ... Antenna duplexer (DUP) 3 ... Receiving circuit (RX) 4 ... Synthesizer circuit (SYN) 5 ... A / D converter 6 ... Modem part 7 ... TDMA part 8 ... Channel codec 9 ... Speech codec 10 ... D / A converter 11 ... Reception amplifier 12 ... Receiver 13 ... Microphone 14 ... Transmission amplifier 15 ... A / D converter 16 ... D / A converter 17 ... Transmission circuit (TX) 18 ... Control circuit 19 ... LCD display 20 ... Key unit DESCRIPTION OF SYMBOLS 21 ... Amplifier 22 ... Speaker 23 ... Amplifier 24 ... Vibrator motor 25 ... Oscillation circuit 26 ... CPU 27 ... ROM 28 ... RAM 29 ... Local station address data determination part 30 ... Battery 31 ... Stabilized power supply circuit 32 ... Control bus 40 ... Bit Extraction unit 41: Register 42: Data setting unit for own station 43: Comparison unit 44: Bus interface Over scan 45 ... timing control unit

Claims (1)

[Claims] The present invention is used in a mobile communication system for transmitting transmission data obtained by interleaving data included in one block with a predetermined amount of data as one block. In a mobile communication terminal device which receives a predetermined control channel set for a predetermined period and attempts to acquire information addressed to the own station, extracting data constituting predetermined destination information from transmission data on the control channel Extracting means for performing, in accordance with the fact that all of the data constituting the destination information has been extracted by the extracting means, determine whether or not the destination information indicated by those data specifies the own station. Determining means for performing, if the determining means determines that the destination information does not specify the own station, the receiving operation is stopped before the predetermined period ends. A mobile communication terminal device comprising: