JPH09224287A - Communication terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication terminal equipment reducing transmission power consumption by not sending frame data whose reception and decoding is disable, from a head of the frame. SOLUTION: The communication terminal equipment in which a frame signal is revised into a signal delaying the frame by a frame offset designated from a system frame with a base station in matching with an action time and the transmission is stopped till a timing of the frame signal after the revision, is provided with a call control means 1 decoding the message of the base station and provides the output of an action time and with a pre-action trigger signal means 11 outputting a pre-action trigger signal to a transmission stop device in a timing of one preceding frame signal of the action time based on the action time. Then the transmission stop device provides the output of a transmission stop signal according to the pre-action trigger signal. Thus, the frame whose frame-offset is revised on the way is stopped for transmission from its head.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication terminal, and more particularly to reducing power consumption for transmission and reception.

[0002]

2. Description of the Related Art The Telecommunications Industry Association of the United States has adopted T as a provisional standard for CDMA mobile communications such as car telephones.
It has decided IE / EIA / IS95A. A communication terminal conforming to this standard performs transmission and reception with the other party through the base station by using a frame having a frequency and a frame offset value (deviation amount from the frame timing which is the reference of the system) assigned by the base station. When changing the frequency and frame offset value assigned to each communication terminal, the base station similarly changes the setting of the frequency and frame offset value used for communication with the communication terminal.

As shown in FIG. 13, a conventional communication terminal of this type sets a transmission / reception frequency and a frame offset value designating a start time of a local station frame based on control data transmitted in a reception message. A call controller 1 for controlling, a system frame signal device 2 for outputting a system frame signal having a frame length cycle, a frame signal device 3 for outputting a frame signal in synchronization with the transmission or reception timing of the local station, and a frame An action trigger signal device 4 that outputs a transmission stop trigger signal when changing an offset value or a frequency, a transmission encoder 5 that generates transmission code data in synchronization with a frame signal output from the frame signal device 3, and a transmission A modulator 6 for modulating code data,
A demodulator 7 for demodulating the received signal, a reception decoder 8 for decoding the received data in synchronization with the frame signal output from the frame signal device 3, and a signal of the transmission frequency and the reception frequency under the control of the call controller 1. Synthesizer 9 for outputting
The transmission stop device 10 outputs a transmission stop signal according to the trigger signal output from the action trigger signal device 4.

FIG. 14 shows a timing chart showing the operation of this communication terminal. In this communication terminal, the call controller 1 decodes the received message decoded by the reception decoder 8 and extracts the designated frequency and frame offset value, which are one of the control signals in the received message, from the received message, To the synthesizer 9 and the frame offset value to the frame signal device 3, respectively.

The system frame signal device 2 is, for example, a TI
The method described in E / EIA / IS95A is used to generate a system frame signal having a cycle of a frame length, which is synchronized with the timing of the system frame of the base station. The frame signal device 3 periodically outputs a frame signal delayed by a frame offset value from the system frame timing.

The synthesizer 9 outputs a transmission frequency signal to the modulator 6 and a reception frequency signal to the demodulator 7 based on an instruction from the call controller 1. The synthesizer 9 locks to keep the frequency constant, and a lock signal indicating this locked state is input to the transmission stopper 10.

The transmission encoder 5 receives the transmission voice data and the transmission message, performs a code process in frame units in synchronization with a frame signal, and generates transmission code data.
The modulator 6 is tuned to the transmission frequency signal to transmit the transmission encoder 5
The transmitted transmission code data is modulated and transmitted.

On the other hand, the demodulator 7 inputs the received radio wave signal in synchronization with the reception frequency signal, demodulates it, and outputs reception code data. The reception decoder 8 inputs the reception code data,
Decoding processing is performed frame by frame in synchronization with the frame signal to extract the received voice data and the received message.

When the change of the designated frequency or the frame offset value is instructed by the received message, the call controller 1 outputs the fetched designated frequency to the synthesizer 9 and the frame offset value to the frame signal device 3, respectively. The action time, which is the time when the frame offset is changed or the designated frequency is changed, is, for example, T
It is determined by the method described in IE / EIA / IS95A, and an action time value indicating the action time is output to the action trigger signal device 4.

The action trigger signal device 4 is the call controller 1.
It recognizes the time of the action time based on the action time value input from, and outputs the action trigger signal synchronized with the system frame signal at the time of the action time. This action trigger signal is input to the frame signal device 3, the synthesizer 9, and the transmission stop device 10. When the frame offset value is changed, the system frame signal, the frame offset value and the action trigger signal are input to the frame signal device 3, and the frame signal device 3 changes the frame at the timing of the action trigger signal indicating the action time. The offset value is changed to a new frame offset value given from the call controller 1, and a frame signal delayed by the frame offset value from the system frame timing is periodically output.

At this time, the base station changes to a new frame offset value at the action time, like the terminal.

When the action trigger signal is input from the action trigger signal device 4, the transmission stop device 10 outputs the transmission stop signal to the transmission encoder 5 and the modulator 6 at the timing of this trigger signal. After that, when the next frame signal is input from the frame signal device 3, the transmission stop signal is stopped at that timing.

The transmission encoder 5 stops the code processing of the frame data while the transmission stop signal is being input from the transmission stop unit 10, and the modulator 6 is input with the transmission stop signal from the transmission stop unit 10. The transmission is stopped while doing.

When the frequency is changed, the call controller 1 inputs a frequency switching request to the synthesizer 9. In response to this, the synthesizer 9 determines the reception frequency and the transmission frequency according to the designated frequency value at the timing of the action trigger signal, and starts the frequency switching between the reception frequency signal and the transmission frequency signal. Synthesizer 9
Unlocks while switching frequencies. Therefore, the lock signal input to the transmission stopper 10 is turned off.

When the frequency is switched, the base station having the channel of the new designated frequency can communicate with the terminal, and the base station having the channel of the former designated frequency cannot communicate with the terminal. When the switching of the frequency is completed, the synthesizer 9 locks the frequency and the lock signal is turned on.

During this period, the transmission stop device 10 outputs a transmission stop signal at the timing of the action trigger signal, and then,
The transmission stop signal is stopped at the timing of the next frame signal after the lock signal is turned on. The transmission encoder 5 stops the coding process of the frame data while the transmission stop signal is being input from the transmission stop unit 10. The modulator 6 is receiving the transmission stop signal from the transmission stop unit 10. Stop sending for a while.

As a result, the communication terminal, as shown in FIG. 14, stops the transmission of the second frame over the action time at the action time. Therefore, the base station does not receive and decode the second frame data.

Thus, for example, TIA / EIA / I
In the conventional communication terminal according to S95A, as shown in FIG. 14, the base station and the terminal provide an action time, which is a timing for changing the frame offset or the designated frequency, on the system frame timing, and transmit the frame data at the action time. And, the reception is stopped, and the frame offset or the designated frequency is changed in the meantime.

Although the frame offset value is different for each terminal, this makes it possible for the base station and all terminals to simultaneously set the frame offset at the same time, even though each terminal has its own frame offset. Can be changed to. Therefore, it is possible to avoid collision of transmission data that occurs when a plurality of terminals use the same frame offset. Further, the terminals can be distributed to each frequency all at once at the same time. for that reason,
The terminal management of the base station is easy.

[0020]

The data of the second offset frame in FIG. 14 becomes frame data that cannot be received and decoded because the transmission is interrupted midway. But,
Since the conventional communication terminal continues to transmit the second frame until the action time, it performs wasteful transmission of transmitting a part of the unreceivable frame data.

The present invention solves the above-mentioned conventional problems, and the transmission and reception power consumption is reduced by preventing transmission or reception of frame data that cannot be received and decoded from the beginning of the frame. An object is to provide a communication terminal that can be reduced.

[0022]

Therefore, in the communication terminal of the present invention, the transmission or reception stop device is set at the timing of the frame signal immediately before the action time based on the action time value output from the call control means. Pre-action trigger signal means for outputting a pre-action trigger signal is provided, and the stop device is configured to output a stop signal for stopping the transmitting or receiving operation according to the pre-action trigger signal.

Therefore, for a frame whose frequency or frame offset value is changed midway, the transmission or reception operation can be stopped from the beginning of the frame.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION According to the first aspect of the present invention, when a message is transmitted from a base station to notify a change of a frame offset value, it is adjusted in accordance with an action time corresponding to the timing of a reference system frame. , With the base station, change the frame signal from the system frame to a frame signal delayed by the specified frame offset value, and transmit operation based on the transmission stop signal output by the transmission stop device until the changed frame signal timing One of the action times based on the action time value output from the call control means, which decodes the message from the base station and outputs the action time value indicating the action time in the communication terminal Pre-action trigger signal to the transmission stop device at the timing of the previous frame signal A pre-action trigger signal means for outputting is provided, and the transmission stop device outputs the transmission stop signal in accordance with the pre-action trigger signal. For a frame whose frame offset value is changed from the middle, from the beginning of the frame The transmission operation can be stopped.

According to a second aspect of the present invention, when the base station sends a message notifying that the frame offset value has been changed, the frame signal is sent together with the base station in accordance with the action time that matches the timing of the reference system frame. In the communication terminal that changes the frame signal delayed from the system frame by the specified frame offset value, and until the timing of the changed frame signal, stops the receiving operation based on the reception stop signal output by the reception stopper, Call control means for decoding a message from the base station and outputting an action time value indicating an action time, and at the timing of the frame signal immediately before the action time based on the action time value output from the call control means. A preamplifier that outputs a pre-action trigger signal to the receiver And a reception stop signal is output by the reception stopper in accordance with the pre-action trigger signal.For a frame whose frame offset value is changed from the middle, the reception operation is started from the beginning of the frame. You can stop.

According to the third aspect of the present invention, when the base station sends a message notifying the change of frequency, the frequency is designated together with the base station in accordance with the action time that coincides with the timing of the reference system frame. The communication terminal that changes the frequency to the specified frequency and stops the transmission operation based on the transmission stop signal output by the transmission stop device until the timing of the changed frame signal, decodes the message from the base station and takes the specified frequency and action. Based on the action time value output from the call control means, the call control means that outputs the action time value indicating the time, the transmission synthesizer that starts changing the transmission frequency to the specified frequency according to the action time, and the action At the timing of the frame signal immediately before the time, the pre-action trigger is sent to the transmission stop device. A pre-action trigger signal means for outputting a signal is provided, and the transmission stop device outputs the transmission stop signal in accordance with the pre-action trigger signal. For a frame whose transmission frequency is changed midway, the beginning of the frame The transmission operation can be stopped from.

According to the fourth aspect of the invention, when the base station sends a message notifying that the frequency has been changed, the frequency is specified together with the base station in accordance with the action time that matches the timing of the reference system frame. The communication terminal that changes the frequency to a different frequency and stops the receiving operation based on the reception stop signal output by the reception stop device until the timing of the changed frame signal, decodes the message from the base station and takes the specified frequency and action. Based on the action time value output from the call control means, the call control means that outputs the action time value indicating the time, the reception synthesizer that starts changing the reception frequency to the specified frequency in accordance with the action time, At the timing of the frame signal immediately before the time, a pre-action trigger is sent to the reception stopper. A pre-action trigger signal means for outputting a signal is provided so that the reception stop device outputs the reception stop signal in accordance with the pre-action trigger signal. The reception operation can be stopped from.

According to a fifth aspect of the present invention, when the base station sends a message notifying that the frequency has been changed, the frequency is changed to a specified frequency together with the base station, and the changed frame signal timing is reached. In a communication terminal that stops a transmission operation based on a transmission stop signal output by a transmission stop device, call control means that decodes a message from a base station and outputs a designated frequency and an action time value indicating an action time, and a call. Based on the action time value output from the control means, a pre-action trigger signal means for outputting a pre-action trigger signal at the timing of the frame signal immediately before the action time, and a transmission frequency designation according to the pre-action trigger signal With a transmission synthesizer that starts changing to the frequency, the transmission stop is pre-action The transmission stop signal is output according to the rigger signal.For frames whose transmission frequency is changed from the middle, the transmission operation is stopped from the beginning of the frame and the transmission frequency is changed from the beginning of the frame. You can start.

According to a sixth aspect of the present invention, when the base station sends a message notifying that the frequency has been changed, the frequency is changed to a specified frequency together with the base station, and the changed frame signal timing is reached. A call control means for decoding a message from a base station and outputting a designated frequency and an action time value indicating an action time in a communication terminal that stops a receiving operation based on a reception stop signal output by a reception stop device, and a call. Based on the action time value output from the control means, a pre-action trigger signal means for outputting a pre-action trigger signal at the timing of the frame signal immediately before the action time, and designation of the reception frequency in accordance with the pre-action trigger signal A receiver synthesizer that starts changing to the frequency is provided, and the receiver is pre-action It is designed to output a reception stop signal in accordance with a rigger signal.For frames whose reception frequency is changed from the middle, the reception operation is stopped from the beginning of the frame and the reception frequency is changed from the beginning of the frame. You can start.

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

(Embodiment 1) The communication terminal of the first embodiment is configured to stop transmission of a frame whose frame offset is changed in the middle from the beginning.

As shown in FIG. 1, this communication terminal has a call controller 1 for controlling a transmission / reception frequency and a frame offset value based on control data transmitted in a reception message.
, A system frame signal device 2 that outputs a system frame signal, a frame signal device 3 that outputs a frame signal in time with the transmission or reception timing of the local station, and an action that outputs an action trigger signal at the time when the frame offset is changed. Trigger signal device 4 and frame signal device 3
The transmission encoder 5 that generates transmission code data in synchronism with the frame signal that is output, the modulator 6 that modulates the transmission code data, the demodulator 7 that demodulates the reception signal, and the frame that the frame signal device 3 outputs. A reception decoder 8 that decodes the reception data in synchronization with the signal, and a pre-action trigger signal that outputs a pre-action trigger signal that is synchronized with the frame signal immediately before the action time based on the action time value output from the call controller 1. Action trigger signal device 11, and transmission stop device 10 that outputs a transmission stop signal in response to the pre-action trigger signal output from pre-action trigger signal device 11.
And

A timing chart showing the operation of this communication terminal is shown in FIG. In this communication terminal, when the change of the frame offset value is instructed by the received message, the call controller 1 outputs the frame offset value extracted from the received message to the frame signal device 3 and also changes the frame offset. The action time, which is the time at which the
5A, the action time value indicating the action time is output to the action trigger signal device 4 and the pre-action trigger signal device 11.

The action trigger signal device 4 is the call controller 1.
It recognizes the time of the action time based on the action time value input from, and outputs the action trigger signal synchronized with the system frame signal at the time of the action time. This action trigger signal is input to the frame signal device 3.

The frame signal device 3 receives the frame offset value from the call controller 1 at the timing of the action trigger signal indicating the action time based on the input system frame signal, frame offset value and action trigger signal. The frame signal is changed to the frame offset value, and the frame signal delayed by the frame offset value from the system frame timing is periodically output. This frame signal is input to the pre-action trigger signal device 11, the transmission stop device 10, the reception decoder 8 and the transmission encoder 5.

The pre-action trigger signal device 11 recognizes the time of the action time from the action time value input from the call control unit 1 and outputs a pre-action trigger signal synchronized with the frame signal immediately before the action time. This pre-action trigger signal is input to the transmission stop device 10, and the transmission stop device 10 sends the transmission stop signal at the timing of the pre-action trigger signal to the transmission encoder 5 and the modulator 6.
Output to After that, the transmission stop signal is stopped at the timing of the next frame signal.

The transmission encoder 5 stops the code processing of the frame data while the transmission stop signal is being input from the transmission stop unit 10, and the modulator 6 is input with the transmission stop signal from the transmission stop unit 10. The transmission is stopped while doing. Therefore, FIG.
As shown in, the second frame data spanning the action time is not transmitted from the beginning of the frame.

As described above, the communication terminal of the first embodiment is
Transmission of the frame whose frame offset is changed is stopped from the beginning. That is, the base station does not transmit frame data that cannot be received and decoded from the beginning of the frame. Therefore, useless transmission power can be reduced accordingly.

(Embodiment 2) The communication terminal of the second embodiment is configured so as to stop receiving from the beginning of the frame the frame whose frame offset is changed in the middle of the frames transmitted from the base station. ing.

As shown in FIG. 3, this communication terminal receives a reception stop signal based on the pre-action trigger signal input from the pre-action trigger signal device 11 in place of the transmission stop device and receives the reception decoder 8 and the demodulator 7. Output to the reception stopper 12
It has. The other configuration is the same as that of the device of the first embodiment (FIG. 1).

A timing chart showing the operation of this communication terminal is shown in FIG. In this communication terminal, when the change of the frame offset value is instructed by the received message, the call controller 1, the action trigger signal device 4,
The frame signal device 3 and the pre-action signal device 11 are the first
The pre-action trigger signal device 11 performs the same operation as that of the first embodiment, and the pre-action trigger signal device 11 receives the pre-action trigger signal synchronized with the frame signal immediately before the action time.
Output to

The reception stop unit 12 outputs the reception stop signal to the reception decoder 8 and the demodulator 7 at the timing of the pre-action trigger signal, and then stops the reception stop signal at the timing of the next frame signal.

The reception decoder 8 stops the frame data reception process while the reception stop signal is being input from the reception stop device 12, and the demodulator 7 is receiving the reception stop signal from the reception stop device 12. While receiving, stop receiving. Therefore, FIG.
As shown in, the second frame data spanning the action time is not received from the beginning of the frame.

In this way, the communication terminal of the second embodiment is
Among the frames transmitted from the base station, the reception of the frame whose frame offset is changed is stopped from the beginning. That is, the communication terminal does not receive the frame data that cannot be received and decoded from the beginning of the frame. Therefore, useless received power can be reduced accordingly.

(Third Embodiment) A communication terminal according to a third embodiment is configured to stop transmission of a frame whose transmission frequency is changed midway from the beginning.

As shown in FIG. 5, this communication terminal includes a call controller 1 for controlling the frequency of transmission and reception based on control data transmitted in a reception message, and a system frame signal device 2 for outputting a system frame signal. A frame signal device 3 which outputs a frame signal in synchronization with the transmission or reception timing of its own station; and an action trigger signal device 4 which outputs an action trigger signal at a frequency change time.
A transmission encoder 5 for generating transmission code data in synchronization with a frame signal output from the frame signal device 3, a modulator 6 for modulating the transmission code data, a demodulator 7 for demodulating a reception signal, and a frame signal Receiving decoder 8 for decoding the received data in synchronization with the frame signal output from the device 3, and pre-action synchronized with the frame signal immediately before the action time based on the action time value output from the call controller 1. Depending on a pre-action trigger signal device 11 that outputs a trigger signal, a transmission synthesizer 13 that outputs a signal of a transmission frequency under the control of the call controller 1, and a pre-action trigger signal output from the pre-action trigger signal device 11. And a transmission stop device 10 for outputting a transmission stop signal.

A timing chart showing the operation of this communication terminal is shown in FIG. In this communication terminal, when the transmission message is instructed to change the transmission frequency, the call controller 1 extracts the specified frequency from the reception message, requests the transmission synthesizer 13 to switch the frequency, and changes the frequency. The action time, which is the time at which the action is performed, is determined by, for example, the method described in TIE / EIA / IS95A, and the action time value indicating the action time is output to the action trigger signal device 4 and the pre-action trigger signal device 11.

The action trigger signal device 4 is the call controller 1.
It recognizes the time of the action time based on the action time value input from, and outputs the action trigger signal synchronized with the system frame signal at the time of the action time. This action trigger signal is input to the transmission synthesizer 13.

Upon receiving the frequency switching request from the call controller 1, the transmission synthesizer 13 determines the transmission frequency according to the designated frequency value at the timing of the action trigger signal and starts the frequency switching of the transmission frequency signal. The transmission synthesizer 13 releases the lock when the frequency is switched, and the lock signal input to the transmission stopper 10 is turned off during that period.

The pre-action trigger signal device 11 recognizes the time of the action time from the action time value input from the call control unit 1 and outputs the pre-action trigger signal synchronized with the frame signal immediately before the action time. This pre-action trigger signal is input to the transmission stop device 10, and the transmission stop device 10 sends the transmission stop signal at the timing of the pre-action trigger signal to the transmission encoder 5 and the modulator 6.
Output to After that, the transmission stop device 10 receives the lock signal O
The transmission stop signal is stopped at the timing of the next frame signal after reaching N.

The transmission encoder 5 stops the code processing of the frame data while the transmission stop signal is being input from the transmission stop unit 10, and the modulator 6 is input with the transmission stop signal from the transmission stop unit 10. The transmission is stopped while doing. Therefore, FIG.
As shown in, the second frame data spanning the action time is not transmitted from the beginning of the frame.

As described above, the communication terminal of the third embodiment is
For the frame whose transmission frequency is changed in the middle of the frame to be transmitted, the transmission is stopped from the beginning. That is, the frame data that the base station cannot receive and decode
Do not send from the beginning of the frame. Therefore, useless transmission power can be reduced accordingly.

(Embodiment 4) The communication terminal of the fourth embodiment is configured to stop receiving a frame whose reception frequency is changed in the middle from the beginning.

This communication terminal, as shown in FIG.
In place of the transmission synthesizer of the embodiment, a reception synthesizer 14 that outputs a signal of a reception frequency based on the control of the call controller 1 is provided, and instead of the transmission stop device, reception stop is performed according to a pre-action trigger signal. A reception stopper 12 that outputs a signal is provided. Other configurations are the same as those of the third embodiment (FIG. 5).

A timing chart showing the operation of this communication terminal is shown in FIG. In this communication terminal, when a change in the reception frequency is instructed by the reception message, the call controller 1 extracts the specified frequency from the reception message, requests the reception synthesizer 14 to switch the frequency, and sets the action time value. Is output to the action trigger signal device 4 and the pre-action trigger signal device 11.

The action trigger signal device 4 and the pre-action trigger signal device 11 perform the same operation as that of the third embodiment, and the pre-action trigger signal device 11 performs the pre-action synchronized with the frame signal immediately before the action time. The trigger signal is output to the reception stopper 12.

When receiving the frequency switching request from the call controller 1, the receiving synthesizer 14 determines the receiving frequency according to the designated frequency value at the timing of the action trigger signal input from the action trigger signal device 4, and switches the frequency of the receiving frequency signal. To start. Receiving synthesizer 14
When the frequency is switched, the lock is released, during which the lock signal input to the reception stopper 12 is turned off.

When the pre-action trigger signal is input from the pre-action trigger signal device 11, the reception stop device 12 outputs the reception stop signal to the reception decoder 8 and the demodulator 7 at the timing of this pre-action trigger signal. Reception stop
12 thereafter stops the reception stop signal at the timing of the next frame signal after the lock signal is turned on.

The reception decoder 8 stops the reception processing of the frame data while the reception stop signal is input from the reception stop device 12, and the demodulator 7 inputs the reception stop signal from the reception stop device 12. While receiving, stop receiving. Therefore, FIG.
As shown in, the second frame data spanning the action time is not received from the beginning of the frame.

As described above, the communication terminal of the fourth embodiment stops the reception of the frame whose reception frequency is changed in the middle of the frames transmitted from the base station, from the beginning. That is, it is possible to prevent the communication terminal from receiving frame data that cannot be received and decoded from the beginning of the frame, and reduce useless received power by that amount.

(Embodiment 5) The communication terminal of the fifth embodiment can shorten the transmission disconnection time when switching the transmission frequency.

This communication terminal, as shown in FIG.
The action trigger signal device included in the terminal of the above embodiment is not provided, and the transmission synthesizer 13 is configured such that the pre-action trigger signal is input from the pre-action trigger signal device 11. Other configurations are the same as those of the third embodiment (FIG. 5).

A timing chart showing the operation of this communication terminal is shown in FIG. In this communication terminal, when the transmission message is instructed to change the transmission frequency, the call controller 1 extracts the specified frequency from the reception message, requests the transmission synthesizer 13 to switch the frequency, and also sets the action time value. To the pre-action trigger signal device 11.

The pre-action trigger signal device 11 recognizes the time of the action time from the action time value input from the call control unit 1 and stops the transmission of the pre-action trigger signal synchronized with the frame signal immediately before the action time. Output to 10 and transmission synthesizer 13.

Upon receiving the frequency switching request from the call controller 1, the transmission synthesizer 13 determines the transmission frequency according to the designated frequency value at the timing of the pre-action trigger signal and starts the frequency switching of the transmission frequency signal.
The transmission synthesizer 13 releases the lock when the frequency is switched, and the lock signal input to the transmission stopper 10 is turned off during that period.

The transmission stop device 10 outputs a transmission stop signal to the transmission encoder 5 and the modulator 6 at the timing of the pre-action trigger signal input from the pre-action trigger signal device 11. The transmission stop unit 10 then stops the transmission stop signal at the timing of the next frame signal after the lock signal is turned on.

The transmission encoder 5 stops the code processing of the frame data while the transmission stop signal is being input from the transmission stop unit 10, and the modulator 6 is input with the transmission stop signal from the transmission stop unit 10. The transmission is stopped while doing. Therefore, FIG.
As shown in 0, the second frame data straddling the action time is not transmitted from the beginning of the frame. Moreover, since the change of the transmission frequency is started from the beginning of the second frame, it can be finished in an early time. Therefore, the time during which the transmission is stopped is shorter than that in the third embodiment.

As described above, the communication terminal of the fifth embodiment is
For the frame whose transmission frequency is changed in the middle of the frame to be transmitted, the transmission is stopped from the beginning. That is, the frame data that the base station cannot receive and decode
You can choose not to send from the beginning of the frame,
Useless transmission power can be reduced accordingly. In addition, it is possible to further reduce the instantaneous interruption time of the transmission data due to the switching of the transmission frequency.

(Embodiment 6) The communication terminal of the sixth embodiment can shorten the reception disconnection time when switching the reception frequency.

As shown in FIG. 11, this communication terminal does not include the action trigger signal device included in the terminal of the fourth embodiment, and the reception synthesizer 14 includes the pre-action trigger signal device 11. The pre-action trigger signal is input from the. Other configurations are the same as those of the fourth embodiment (FIG. 7).

A timing chart showing the operation of this communication terminal is shown in FIG. In this communication terminal, when a change in the reception frequency is instructed by the reception message, the call controller 1 extracts the specified frequency from the reception message, requests the reception synthesizer 14 to switch the frequency, and sets the action time value. To the pre-action trigger signal device 11.

The pre-action trigger signal device 11 recognizes the time of the action time from the action time value input from the call control unit 1 and stops the reception of the pre-action trigger signal synchronized with the frame signal immediately before the action time. It outputs to 12 and the receiving synthesizer 14.

When receiving the frequency switching request from the call controller 1, the receiving synthesizer 14 determines the receiving frequency according to the designated frequency value at the timing of the pre-action trigger signal and starts the frequency switching of the receiving frequency signal.
The reception synthesizer 14 releases the lock when switching the frequency, and the lock signal input to the reception stopper 12 is turned off during that period.

The reception stop device 12 outputs a reception stop signal to the reception decoder 8 and the demodulator 7 at the timing of the pre-action trigger signal input from the pre-action trigger signal device 11. After that, the reception stopper 12 stops the reception stop signal at the timing of the next frame signal after the lock signal is turned on.

The reception decoder 8 stops the decoding process of the frame data while the reception stop signal is input from the reception stop device 12, and the demodulator 7 inputs the reception stop signal from the reception stop device 12. While receiving, stop receiving. Therefore, FIG.
As shown in 2, the second frame data that extends over the action time is not received from the beginning of the frame. Moreover, since the change of the reception frequency is started from the beginning of the second frame, it can be finished in an early time. Therefore, the time during which the reception is stopped is shorter than that in the fourth embodiment.

In this way, the communication terminal of the sixth embodiment is
Among the frames to be received, the frame whose reception frequency is changed in the middle is stopped from the beginning. That is, the frame data that cannot be received and decoded transmitted from the base station can be prevented from being received from the beginning of the frame, and the useless received power can be reduced accordingly. In addition, it is possible to further shorten the interruption time of the reception data due to the switching of the reception frequency.

[0077]

As is apparent from the above description, the communication terminal of the present invention is designed so that frame data whose transmission / reception frequency or frame offset value is changed in the middle of a frame is not transmitted or received from the beginning of the frame. Therefore, it is possible to reduce wasteful transmission power and reception power consumption.

Further, the communication terminal configured to directly input the pre-action trigger signal to the synthesizer can shorten the instantaneous interruption time of the transmission / reception data due to the switching of the transmission / reception frequency.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a communication terminal according to a first embodiment of the present invention,

FIG. 2 is a timing sequence diagram in the communication terminal of the first embodiment,

FIG. 3 is a block diagram showing a configuration of a communication terminal according to a second embodiment of the present invention,

FIG. 4 is a timing sequence diagram in the communication terminal of the second embodiment,

FIG. 5 is a block diagram showing a configuration of a communication terminal according to a third embodiment of the present invention,

FIG. 6 is a timing sequence diagram in the communication terminal of the third embodiment,

FIG. 7 is a block diagram showing a configuration of a communication terminal according to a fourth embodiment of the present invention,

FIG. 8 is a timing sequence diagram in the communication terminal of the fourth embodiment,

FIG. 9 is a block diagram showing a configuration of a communication terminal according to a fifth embodiment of the present invention,

FIG. 10 is a timing sequence diagram in the communication terminal of the fifth embodiment,

FIG. 11 is a block diagram showing a configuration of a communication terminal according to a sixth embodiment of the present invention,

FIG. 12 is a timing sequence diagram in the communication terminal of the sixth embodiment,

FIG. 13 is a block diagram showing a configuration of a conventional communication terminal,

FIG. 14 is a timing sequence diagram of a conventional communication terminal.

[Explanation of symbols]

 1 Call Controller 2 System Frame Signaler 3 Frame Signaler 4 Action Trigger Signaler 5 Transmission Encoder 6 Modulator 7 Demodulator 8 Reception Decoder 9 Synthesizer 10 Transmission Stopper 11 Pre-action Trigger Signaler 12 Reception Stopper 13 Transmission Synthesizer 14 Receive synthesizer

Claims (6)

[Claims] 1. When the base station sends a message notifying that the frame offset value has been changed, a frame signal is designated from the system frame together with the base station in accordance with an action time that matches the timing of a reference system frame. At the communication terminal that changes the frame signal delayed by the frame offset value and stops the transmission operation based on the transmission stop signal output by the transmission stopper until the changed frame signal timing, decode the message from the base station. And a call control means for outputting an action time value indicating the action time, and based on the action time value output from the call control means, the transmission stop device is pre-loaded at the timing of the frame signal immediately before the action time. Pre-action trigger that outputs action trigger signal Communication terminal, characterized in that Patent and means, the transmission stop unit outputs said transmission stop signal according to the pre-action trigger signal. 2. When the base station sends a message notifying that the frame offset value has been changed, a frame signal is designated from the system frame together with the base station in accordance with an action time that matches the timing of the reference system frame. At the communication terminal that changes the frame signal delayed by the frame offset value and stops the receiving operation based on the reception stop signal output by the reception stop device until the changed frame signal timing, decode the message from the base station. And a call control means for outputting an action time value indicating an action time, and based on the action time value output from the call control means, the reception stop device is pre-loaded at the timing of the frame signal immediately before the action time. Pre-action trigger that outputs action trigger signal Communication terminal, characterized in that Patent and means to output the received stop signal the reception stop device is in accordance with the pre-action trigger signal. 3. When the base station sends a message notifying that the frequency has been changed, the frequency is changed to a specified frequency together with the base station in accordance with an action time that matches the timing of a reference system frame, At the communication terminal that stops the transmission operation based on the transmission stop signal output by the transmission stopper until the timing of the changed frame signal, decode the message from the base station and set the action time value that indicates the specified frequency and action time. Based on the action time value output from the call control unit, and a transmission synthesizer that starts changing the transmission frequency to the designated frequency in accordance with the action time. A pre-action trigger signal is output to the transmission stopper at the timing of the frame signal. A communication trigger terminal which outputs the transmission stop signal in accordance with the reaction trigger signal. 4. When the base station sends a message notifying that the frequency has been changed, the frequency is changed to a specified frequency together with the base station in accordance with the action time that matches the timing of the reference system frame. At the communication terminal that stops the receiving operation based on the reception stop signal output by the reception stopper until the timing of the changed frame signal, decode the message from the base station and set the action time value that indicates the specified frequency and action time. Based on the action time value output from the call control means, based on the action time value output from the call control means. A pre-action trigger signal is output to the reception stopper at the timing of the frame signal. A communication trigger terminal which outputs the reception stop signal according to the reaction trigger signal. 5. When the base station sends a message to notify the change of the frequency, the base station and the base station change the frequency to a specified frequency, and the transmission output from the transmission stop unit until the timing of the changed frame signal. In a communication terminal that stops a transmission operation based on a stop signal, a call control unit that decodes a message from a base station and outputs a designated frequency and an action time value indicating an action time, and a call control unit that outputs the call time. Based on the action time value, a pre-action trigger signal means for outputting a pre-action trigger signal at the timing of the frame signal immediately before the action time, and changing the transmission frequency to a designated frequency in accordance with the pre-action trigger signal. A transmit synthesizer for initiating, wherein the transmit stop is the pre-action trigger A communication terminal which outputs the transmission stop signal according to a signal. 6. When the base station sends a message notifying that the frequency has been changed, the frequency is changed to a specified frequency together with the base station, and the reception is output from the reception stopper until the timing of the changed frame signal. In a communication terminal that stops receiving operation based on a stop signal, call control means for decoding a message from a base station and outputting a designated frequency and an action time value indicating an action time, and the call control means. Pre-action trigger signal means for outputting a pre-action trigger signal at the timing of the frame signal immediately before the action time based on the action time value; and changing the reception frequency to a designated frequency in accordance with the pre-action trigger signal. A reception synthesizer for starting the reception trigger, A communication terminal which outputs the reception stop signal according to a signal.