KR100267382B1 - Radio communication terminal - Google Patents

Abstract

According to the present invention, it is possible to securely acquire the control information on the self without leaking, and to extend the call waiting time by suppressing the execution time of the reception operation to the minimum necessary.

The received control information is stored in the control information storage area 8a. The control unit 16 compares the first word of the message newly received by the receiver 21 by the head control information comparing means 16a with the control information stored in the control information storage area 8a. As a result of this comparison, when the same control information as the new control information is stored in the control information storage area 8a, the control unit 16 determines that the power supply control unit 16b does not interfere with reception of the next message. The power supply to the receiver 21 is cut off for a predetermined period so that control information is not acquired by the control information obtaining means 16c.

Description

Wireless communication terminal device

The present invention relates to a wireless communication terminal apparatus for use in a mobile communication system, for example, a TACS system, in which a base station repeatedly transmits the same control information a predetermined number of times in one message in a control channel.

In various AMPS systems such as Advanced Mobile Phone Service (AMPS), Total Access Communications System (TACS), or Extended TACS (E-TACS), or various TACS systems, as shown in FIG. A control channel (FOCC; hereinafter referred to as a downlink control channel) for the cellular phone device MS is established, and an incoming call is transmitted from the base station BS to the cellular phone device MS through the downlink control channel FOCC. Various kinds of control information are supplied.

In each of the above schemes, the form of a signal (hereinafter, referred to as a downlink control channel signal) transmitted through the downlink control channel (FOCC) is determined as shown in FIG. That is, as shown in Fig. 6B, after the bit synchronizing code (10 bits) and the word synchronizing code (11 bits), words A and word B (40 bits each, respectively) representing actual control information are alternated. Each 5 times in succession. A total of 43 bits of Busy / Idle bit codes are distributed and arranged in each piece of information to form a message M of 464 bits in total. In addition, n message numbers M (M-1, M-2, ..., Mn) are arranged side by side, and one system parameter SP is added at the beginning to form one message string. do. Subsequently, this message sequence continues to form a downlink control channel signal.

The mobile telephone apparatus MS receives the downlink control channel signal in a call waiting state, recognizes the contents of either the word A or the word B of each message M, and obtains control information about itself. When it finds out, it operates according to the content of the control information, and destroys the control information which is not about self.

In addition, which one of the words A and B is received is fixedly determined for each mobile telephone apparatus MS, for example, depending on whether the terminal number is excellent or odd. Further, at the time of transmission, so-called majority vote processing is performed in which the same five words are compared with each other so that three or more identical words are valid words.

By the way, in order to receive the control information about the self in the mobile telephone apparatus MS without leaking, basically, the downlink control channel signal is always received in the call waiting state.

However, in order to always receive the downlink control channel signal in this manner, the receiver must always be turned on, so that the power consumption at the time of the call waiting becomes large and the call waiting time is shortened.

Therefore, in Japanese Patent Laid-Open No. 8-65191 as a conventional technique for solving such a problem, a period in which a word different from the word to be received comes, that is, a word to be received is a word (A). Is turned off in the period in which the word B arrives. In Japanese Patent Application Laid-open No. Hei 8-65191, when the first three words coincide, the receiver is turned off, including a period in which the words to be received are received in the period in which the remaining two words arrive. I'm supposed to.

However, even in the technique of Japanese Patent Application Laid-open No. Hei 8-65191, three words must always be received, and in a period in which a word that is unnecessary to receive during the period in which a word to be received arrives arrives, Since the receiver cannot be turned off over a period of time and the receiver must be turned on from the middle of the period in order to correctly receive the next word, there is still useless power consumption.

As described above, since the reception has been required for many periods in the past, there is a problem that the standby time is shortened due to the unnecessary power consumption.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object thereof is to securely acquire the control information for itself without leaking, and to extend the call waiting time by suppressing the execution time of the reception operation to the minimum necessary. It is to provide a wireless communication terminal device that can be.

FIG. 1 is a functional block diagram showing the main components of a TACS-type mobile telephone apparatus constructed by applying a wireless communication terminal apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the processing procedure in the control information storage process of the control unit 16 in FIG. 1;

3 is a flowchart showing a processing procedure at the time of waiting for a call of the controller 16 in FIG. 1;

4 is a view showing an example of a period of turning off power supply to the receiver 21 of FIG.

5 is a diagram illustrating a transmission state of control information through a downlink control channel from a base station to a mobile phone apparatus;

6 is a diagram illustrating a form of a signal transmitted through a downlink control channel (FOCC).

<Explanation of symbols for main parts of drawing>

One… antenna,

2… Wireless,

3... Receiving field strength detector,

4… Control information separation synthesis unit,

5... Audio,

6... speaker ,

7... microphone,

8… Memory,

8a... Control information storage area,

9... Timer,

10... Control Panel,

11... Display,

12... Power Supply,

13... Receiver power switch (SW),

14... External power connection detection unit,

15... External power terminal,

16... Control,

16a... Head control information comparison means,

16b... Power supply control means,

16c... Control information acquisition means,

16d... Means for comparing fixed control information,

16e... Control information storage control means.

In order to achieve the above object, the present invention relates to receiving means such as a receiver for receiving a transmission signal of a base station and control information storing means such as a memory unit (control information storage area) for storing control information, for example. First control information comparing means for comparing the first control information of the message newly received by the receiving means with the control information stored in the control information storing means, and the result of the comparison of the newly received message as a result of the comparison in the first control information comparing means. Power supply control means for stopping power supply to the receiving means for a predetermined period of time within the range where there is no problem in receiving the next message, when the same control information as the first control information is stored in the control information storing means; Comparison result in the head control information comparison means The same control information as the first control information of the newly received message. Control information storage means for acquiring control information from the message only when it is not stored in the control information storage means, and control information storage control means for storing the control information acquired from the control information acquisition means in the control information storage means. It is provided.

By taking such means, the received control information is stored in the control information storage means by the control information storage control means. When the control information of the head of the message is newly received by the receiving means, the control information is compared by the control information stored in the control information storage means and the head control information comparing means, and as a result, the head of the newly received message. If the same control information as that of the control information is stored in the control information storing means, the power supply to the receiving means is cut off by the power supply control means for a predetermined period of time within the range where there is no problem in receiving the next message. Thus, in this period, the power consumption at the receiving means is eliminated and the burden on the battery is reduced.

(Example)

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is a functional block diagram showing the main components of a TACS type mobile telephone apparatus constructed by applying the wireless communication terminal apparatus according to the present embodiment.

As shown in the figure, the mobile phone apparatus of this embodiment includes an antenna 1, a radio unit 2, a reception field strength detection unit 3, a control information separating synthesis unit 4, an audio unit 5, and a speaker ( 6), microphone 7, memory unit 8, timer unit 9, operation unit 10, display unit 11, power supply unit 12, receiver power switch (SW) 13, external power connection detection unit 14, an external power supply terminal 15, and a control unit 16 are provided.

The radio carrier signal transmitted from the base station is received by the antenna 1 and then input to the receiver 21 of the radio unit 2. In the receiver 21, the received radio carrier signal is detected and demodulated using a received local oscillation signal generated by an internal frequency synthesizer, and converted into a received baseband signal. Here, the local oscillation frequency generated from the frequency synthesizer is instructed by the controller 16 in accordance with the desired channel. In addition, the reception field strength detection unit 3 is connected to the receiver 21. The reception field strength detection unit 3 detects the reception field strength of the radio carrier signal from the base station, and the detected value is used to determine an empty channel of the radio channel or whether to perform battery saving operation. The control unit 16 is notified for this purpose.

The received baseband signal output from the receiver 21 is input to the control information separation synthesis section 4. In the control information separation and synthesis unit 4, when a signal corresponding to the digital information exists in the received baseband signal, the digital information is extracted and supplied to the control unit 16.

The audio signal in the received baseband signal is supplied to the audio unit 5 via the control information separating and synthesizing unit 4, and amplified by a sign language amplifier (not shown) and output from the speaker 6 as sound.

On the other hand, the voice sound inputted to the microphone 7 is amplified by the voice amplifier not shown in the audio unit 5, and then supplied to the wireless unit 2 through the control information separation and synthesis unit 4. At this time, if the digital information transmitted through the voice channel is output from the control unit 16, the digital information is synthesized by the control information separating and combining unit 4.

In the radio section 2, when the baseband transmission signal is supplied from the control information separation synthesis section 4, it is modulated by the transmitter 22 and predetermined by the transmission local oscillation signal generated in the internal frequency synthesizer. The signal is frequency-converted according to the frequency of the wireless transmission channel of the signal, and amplified to a predetermined transmission power level to form a wireless carrier signal. The radio carrier signal output from the transmitter 22 is transmitted from the antenna 1.

The memory unit 8 is for storing data necessary for the control unit 16 to perform various processes. In this embodiment, a part of the storage area of the memory section 8 is set as the control information storage area 8a for storing the received control information.

The timer unit 9 notifies the control unit 16 of the fact that the timer unit 9 starts up in response to an instruction from the control unit 16 and displays a predetermined time T.

The operation unit 10 is provided with a function key and a 10-key for the user to perform an operation such as an outgoing call, an incoming call response, a dial number input, a call termination, etc., to receive an instruction input by the user.

The display unit 11 is for visually displaying various types of information to be notified to the user under the control of the control unit 16.

The power supply unit 12 includes a battery to supply power to each unit. However, power supply to the receiver 21 is performed through the power switch 13 for the receiver to be controlled on / off by the controller 16.

The external power connection detection unit 14 monitors the state of the power supply unit 12 and detects the fact that the power is supplied from the outside through the external power supply terminal 15 and notifies the control unit 16.

The control unit 16 collectively controls each unit to realize an operation as a mobile telephone apparatus. The control unit 16 includes, for example, a microcomputer as the main processing unit, and in addition to the general control means known in the cellular phone apparatus, the head control information comparing means 16a, the power supply control means 16b, and the control information obtaining means. 16c, the definite control information comparison means 16d and the control information storage control means 16e are provided.

Here, the head control information comparing means 16a compares the control information indicated in the first word of the message received in the call waiting state with the control information stored in the control information storage area 8a of the memory unit 8. To do.

The power supply control means 16b is a power switch for the receiver based on the comparison result by the head control information comparison means 16a, the detection result of the reception electric field strength detection unit 3 and the detection result of the external power connection detection unit 14. (13) is on / off control.

The control information acquiring means 16c performs the process of acquiring the control information from the message received in the call waiting state, in which the control information indicated in the first word is stored in the control information storage area 8a. Control information acquisition processing is performed only from messages that do not match either.

The definite control information comparison means 16d performs a comparison process of the control information determined as correct by the control information acquisition means 16c and the control information stored in the control information storage area 8a.

The control information storage control means 16e stores the control information determined as correct by the control information obtaining means 16c in the control information storage area 8a as a result of the comparison by the definite control information comparing means 16d. When any of the control information is different, the control information storage area 8a stores control information determined as correct by the control information obtaining means 16c.

Next, the operation of the cellular phone device configured as described above will be described according to the processing procedure of the control unit 16. Here, it is assumed that the control data for the self is determined to be transmitted as the word A.

First, the control unit 16 preserves control information as shown in FIG. 2 at predetermined intervals when the main power is turned on or during a general process of well-known processing, or at a specific time (after the end of the call if the corresponding time point is in a call). Is done.

When the control unit 16 starts the control information preservation process, the control unit 16 first performs a data channel scan (step ST1) and a paging channel scan (step ST2), and simulates the downlink control channel FOCC from the result of the paging channel scan. The receiver 21 is set to receive a channel that can be received in a good state and to receive the channel (step ST3).

In this state, in this state, the downlink control channel (FOCC) is received at the receiver 21, and the digital information transmitted through the downlink control channel (FOCC) from the signal is separated by the control information separation synthesis section 4, and the control unit ( 16). Thus, the control unit 16 takes in the digital information supplied from the control information separating and synthesizing unit 4, that is, the digital information (FOCC information) transmitted through the downlink control channel (FOCC) until one message is taken. (Depth ST4 and step ST5).

Then, when one message is taken in, the control unit 16 performs the majority vote processing using the five words A in the message to determine the control information indicated by the message (step ST6). Next, the control unit 16 compares the control information (hereinafter referred to as definite control information) determined in step ST6 with each control information stored in the control information storage area 8a, and the definite control information is determined by the control information. It is judged whether or not it has already been saved in the storage area 8a (step ST7). If not already saved, the determined control information is stored in the control information storage area 8a (step ST8).

On the other hand, when the definite control information is already stored in the control information storage area 8a, the control unit 16 determines whether or not reception of a message for one cycle of the message string has been performed (step ST9). If the reception of the message for one cycle of the message string has not been performed, the processing after step ST4 is repeated. When reception of the message for one cycle of the message is finished, the control unit 16 ends the control information preservation processing.

Then, in the normal call waiting state, the control unit 16 starts the process as the timer unit 9 stops, and performs the process as shown in FIG.

That is, the control unit 16 first turns on the receiver power switch 13 to turn on the power supply from the power supply unit 12 to the receiver 21 (step ST11). Subsequently, the control unit 16 performs bit synchronization code reception processing (step ST12) and word synchronization code reception processing (step ST13) in a well-known procedure, respectively, and takes in the first time of the word A (step). ST14).

Next, the control unit 16 determines whether the external power source is not connected to the external power supply terminal 15 (step ST15) based on the detection result of the external power connection detection unit 14, and receives the received electric field strength by one. Determination of whether or not stationary abnormality is performed (step ST16) is performed based on the detection result of the reception electric field strength detection unit 3, respectively. This requires battery saving unless the external power supply is connected to the external power supply terminal 15, and when the received electric field strength is higher than or equal to a certain value, the error rate is low, so that the battery saving according to the present invention can be carried out without interruption. Judgment is made as to whether or not the same conditions are satisfied. If the above condition is satisfied, the control unit 16 compares the first time of the word A with the respective control information stored in the control information storage area 8a, and judges whether or not there is a match (step ST17). If any of the first information of word A and each of the control information stored in the control information storage area 8a coincide, it is determined that the control information transmitted in the current message is acquired and the battery saving operation is performed. That is, the control unit 16 starts the timer unit 9 (step ST18), turns off the receiving power switch 13, and turns off the power supply from the power supply unit 12 to the receiver 21. After that (step ST19), the processing is terminated and the timer 9 is stopped.

Here, the time T counted by the timer unit 9 is set to be slightly shorter than the time corresponding to the first end of the word B to the fifth end of the word B. FIG. As described above, the control unit 16 turns on the power supply from the power supply unit 12 to the receiver 21 again at the time when the timer unit 9 stops as described above. The power supply from the power supply 12 to the receiver 21 is turned off until slightly earlier than the message arrives.

By the way, if the first time of the word A received this time does not coincide with any of the respective control information stored in the control information storage area 8a, the message arrived this time may be new. Thus, in this case, the control unit 16 takes in the second to fifth times of the word A without turning off the power supply to the receiver 21 (step ST20), and uses the majority of five words A to make a majority decision. Processing is performed to determine the control information indicated by the message (step ST21). The control unit 16 then compares the determined control information obtained in step ST21 with the respective control information stored in the control information storage area 8a and determines whether or not there is a match (step ST22).

Here, if the definite control information does not coincide with any of the control information stored in the control information storage area 8a, since the message arrived this time is new, the definite control information is stored in the control information storage area 8a. Is stored in (step ST23). At this time, if the control information stored in the control information storage area 8a does not have the same type as the control information, the control unit 16 newly stores the control information in the control information storage area 8a. If the control information stored in the storage area 8a has the same type and different contents as the definite control information, the control information is updated with definite control information.

On the other hand, when the definite control information matches any of the control information stored in the control information storage area 8a, since the control information transmitted in this message has been acquired, the control unit 16 controls the control information storage area. Preservation on (8a) is not performed.

Then, when the definite control information coincides with any one of the respective control information stored in the control information storage area 8a, and when the storage of the control information at step ST23 ends, the control unit 16 The process after step ST16 is repeated.

In addition, when the external power source is connected to the external power supply terminal 15, the need for battery saving is low. In addition, when the received electric field strength is weak, transmission errors are likely to occur. Therefore, when it is determined in step ST15 that the external power source is connected to the external power supply terminal 15, or when it is determined in step ST16 that the received electric field strength is not greater than or equal to a predetermined value, the control unit 16 performs the step. The process after step ST20 is performed unconditionally without performing the process of ST17 to ST19.

As described above, according to the present embodiment, the received control information is stored in the control information storage area 8a, and when the first word of the newly arrived message is the same as the stored control information, the newly arrived message is indicated. The control information is determined to have already been received and the reception is stopped, and since the power supply to the receiver 21 is turned off for most of the subsequent period of arrival of the message, power consumption can be greatly reduced, and the call The waiting time can be extended.

In addition, according to this embodiment, when the external power source is connected to the external power supply terminal 15, the need for battery saving is low. Therefore, the control information can be obtained more reliably by always receiving all the words and performing the majority vote processing. It is supposed to be done.

According to the present embodiment, when the received electric field strength is weak, all the words are always received and the majority vote processing is performed to reduce the influence of the transmission error, thereby making it possible to acquire the control information more reliably.

According to the present embodiment, all the information in one message string is taken in when the main power is turned on, every predetermined period or at a specific time, and the control information indicated by the control information indicated by each message included in this message string is stored in the control information storage area 8a. Since the stored control information is updated, a long time has elapsed since acquiring the control information stored in the control information storage area 8a, thereby preventing the newly received word from becoming unsuitable as a comparison target. can do.

In addition, this invention is not limited to the said Example. For example, in the above embodiment, the wireless communication terminal apparatus of the present invention is implemented as a TACS mobile phone apparatus. However, if the wireless communication terminal apparatus is used in various types of mobile communication systems such as AMPS system or TACS system, It is possible to apply. Further, the present invention can be applied to any wireless communication terminal device used in a mobile communication system in which the base station repeatedly transmits the same control information to the terminal a plurality of times even in an AMPS system or a TACS system.

In the above embodiment, the power supply to the receiver 21 is continued when the external power source is connected or when the reception electric field strength is not higher than a predetermined value. However, the power supply to the receiver 21 is also supplied. It is also possible to further reduce the power consumption.

In the above embodiment, when the same control information as the first control information of the message is not stored in the control information storage area 8a, the power supply to the receiver 21 is always turned on. The power supply to the receiver 21 may be turned on / off by a known method as shown in Japanese Patent Laid-Open No. Hei 8-65191.

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

According to the present invention, it is possible to newly receive by receiving means such as a receiver for receiving a transmission signal of a base station, control information storage means such as a memory unit (control information storage area), etc. for storing control information. Head control information comparing means for comparing the first control information of the received message with the control information stored in the control information storing means, the result of the comparison in the head control information comparing means, the same as the first control information of the newly received message. In the case where control information is stored in the control information storage means, the power supply control means for stopping the power supply to the receiving means for a predetermined period of time within a range that does not interfere with the reception of the next message; The control information stored in the control information is the same as the first control information of the newly received message. Control information acquiring means for acquiring control information from the message only when not stored in the message; and control information storage means for storing the control information acquired from the control information acquiring means in the control information storage means. A wireless communication terminal device can be securely obtained without leaking control information for the wireless communication terminal, and the call waiting time can be extended by suppressing the execution time of the reception operation to the minimum necessary.

Claims (8)

A wireless communication terminal apparatus used in a mobile communication system in which a base station repeatedly transmits the same control information of a message a predetermined number of times in a control channel, Reception means for receiving the transmission signal of the base station, control information storage means for storing the control information, and control in which the first control information of a message newly received by the reception means is stored in the control information storage means. Head control information comparison means for comparing the information, and when the control information identical to the first control information of the newly received message is stored in the control information storage means, the next message is received. Power supply control means for stopping the power supply to the receiving means for a predetermined period of time within a predetermined range, and as a result of the comparison in the head control information comparing means, the same control information as the first control information of the newly received message Acquire control information from the message only when it is not stored in the control information storage means. Control information acquisition means and a control information, the radio communication terminal apparatus, characterized in that configured with the control information acquired by the acquisition means and a control information memory control means for storing in said control information storage means. The control information acquiring means according to claim 1, wherein when the control information identical to the first control information of the newly received message is not stored in the control information storing means, as a result of the comparison in the head control information comparing means. A definite control information comparing means for comparing the stored control information with the control information stored in the control information storing means, The control information storage control means stores the control information acquisition means only when the control information identical to the control information acquired by the control information acquisition means is not stored in the control information storage means. And storing the control information acquired in the control information storage means. 3. The control information storage means according to claim 2, wherein said control information storage control means has control information storage means when the control information stored in said control information storage means is different from the control information acquired by said control information acquisition means. And the control information stored in the control information is updated with the control information acquired by the control information obtaining means. The method according to any one of claims 1 to 3, wherein the base station transmits a message as a plurality of parallel message strings, The power supply control means continues to supply power to the receiving means irrespective of the comparison result in the head control information comparing means at a predetermined period or in a period when the next message string arrives at a predetermined time point. The control information storage control means is adapted from each message of the one message string received by the receiving means when the power supply to the receiving means is continued for a period during which one message string arrives by the power supply control means. And all of the control information stored in the control information storage means with the control information acquired by the control information acquisition means. The control information storage means according to any one of claims 1 to 3, wherein the power supply control means stores the same control information as the first control information of a message newly received by the head control information comparing means. Counting means for starting a counting operation from the determined time point and counting a predetermined time slightly shorter than the time from the beginning of the second control information of the message to the beginning of the next message; and in a period during which the counting means is performing the counting operation. Wireless communication terminal device characterized in that consisting of a power supply stop means for stopping the power supply to the receiving means. The receiver according to any one of claims 1 to 3, further comprising reception level detection means for detecting a reception level by said reception means, The power supply control means continues to supply power to the receiving means irrespective of the comparison result in the head control information comparing means when the receiving level detected by the receiving level detecting means is equal to or less than a predetermined level, The control information acquiring means acquires the control information indicated by the predetermined number of control information in the message irrespective of the comparison result in the head control information comparing means when the reception level detected by the reception level detecting means is equal to or less than a predetermined level. Wireless communication terminal device, characterized in that. The apparatus according to any one of claims 1 to 3, further comprising: external power supply detecting means for detecting the presence or absence of power supply from the outside; The power supply control means continues to supply power to the receiving means regardless of the comparison result in the head control information comparing means when the external power supply detecting means detects that power is supplied from the outside. , The control information acquiring means, when it is detected that power is supplied from the outside by the external power supply detecting means, controls information of the predetermined number of times in the message irrespective of the comparison result in the head control information comparing means. And obtaining control information indicated by. The wireless communication terminal according to any one of claims 1 to 3, wherein the mobile communication system to be applied is based on various Advanced Mobile Phone Service (AMPS) systems or various Total Access Communications System (TACS) systems. Device.

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