JPH1164551A - Communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication terminal dispensing with time adjustment of a clock circuit made by a user so as to improve usability. SOLUTION: In a waiting state, PCH (slot data) corresponding to one's own arrival group number is intermittently received. Time information is included in the whole or a part of this PCH. Time adjustment timing of a clock circuit is set every Nt times PCH is received (ST6), and whether there is time information in the received PCH is judged (ST7). When there is time information, the time of the clock circuit is automatically adjusted (ST8). When there is arrival information in the received PCH, a shift to arrival processing action is made (ST4).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device suitable for use in a portable telephone or the like. More specifically, time information is obtained from a signal transmitted through a communication line, and the time of the clock circuit is automatically adjusted based on the time information, so that the user does not need to adjust the time of the clock circuit. The present invention relates to the communication terminal device described above.

[0002]

2. Description of the Related Art Simplified mobile phones (PHS: Personal H)
A communication terminal device such as an andyphone system includes a clock circuit, and the current time is displayed on a display unit. Generally, the user adjusts the time of the clock circuit while looking at the instruction manual when purchasing the communication terminal device.
By the way, the accuracy of this kind of clock circuit is not so good,
For example, there is a deviation from the actual time at a rate of 30 seconds / month. When the deviation from the actual time becomes large, it is necessary to adjust the time of the clock circuit. Further, this type of clock circuit does not have a backup function, and when the battery is replaced, the clock circuit stops and a difference occurs from the actual time. Also in this case, it is necessary to adjust the time of the clock circuit.

[0003]

As described above, when it is necessary to adjust the time of the clock circuit, the user adjusts the clock circuit while looking at the instruction manual, for example. Checking the current time was also required, which was very troublesome.

Accordingly, the present invention provides a communication terminal device which does not require the user to adjust the time of the clock circuit, thereby improving usability.

[0005]

A communication terminal device according to the present invention has a clock circuit, time information acquiring means for acquiring time information from a signal transmitted through a communication line, and time information acquiring means for acquiring the time information. Clock adjusting means for adjusting the time of the clock circuit based on the time information.

In the present invention, time information is obtained from a signal transmitted through a communication line. Then, the time of the clock circuit is automatically adjusted based on the obtained time information. For example, in the case of intermittently receiving slot data sent over a communication line during standby,
Time information is obtained from the slot data, or time information is obtained from a predetermined slot received based on the time information reception instruction information included in the slot data.

For example, in the case of receiving slot data sequentially transmitted through a communication line during a telephone call and selectively using data of a preset slot as received data, time information based on the received data is used. Or, based on the time information reception instruction information included in the received data, time information is obtained from the received data of the predetermined slot.

When slot data is intermittently received during standby, the internal circuit of the communication terminal device is generally in a low current consumption mode between receptions. However, in order to perform the operation of adjusting the time of the clock circuit as described above, the internal circuit of the communication terminal device needs to be in the normal mode other than the low current consumption mode. In other words, the slot data is intermittently received during standby, and time information is obtained from the received slot data to adjust the time of the clock circuit, thereby increasing current consumption. On the other hand, since the internal circuit of the communication terminal device is always in the normal mode other than the low current consumption mode during a call, even if time information is obtained from received data or the like to adjust the time of the clock circuit, the current consumption is reduced. Has no effect.

In addition, a call requesting transmission of time information may be made, and time information sent over a communication line in response to the call may be obtained to adjust the time of a clock circuit. . In this case, the receiving phone number may be a center that provides time information and the center may send time information, or the receiving phone number may be a special phone number and the time information may be sent from the base station. Conceivable. Further, the transmission of the time information may be requested using the destination sub-address part attached to the called telephone number.

[0010] Further, time information may be obtained from a call setting message sent over a communication line when a call is received, and the time of a clock circuit may be adjusted. For example, the time information reception is instructed using the calling telephone number included in the call setting message as a special telephone number, and the time information in the calling subaddress portion is obtained, or the calling subaddress portion included in the call setting message is used. It is conceivable that the reception of the time information is instructed and the time information in the destination subaddress portion is acquired.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a simplified portable telephone (PHS: Personal Handy) as an embodiment.
phone System) 100 is shown.

The telephone 100 includes a microcomputer, a control unit 101 for controlling the whole system, a transmitting / receiving antenna 102, and a receiving signal of a predetermined frequency captured by the antenna 102. Convert to π / 4 shift QPSK (Quadrature P
hase Shift Keying) signal and a radio section 103 for up-converting a π / 4 shift QPSK signal output from a digital modulation / demodulation section to be described later to obtain a transmission signal of a predetermined frequency. The π / 4 shift QPSK signal is demodulated to obtain received data, and TDMA (Time Division Mu
and a digital modulation / demodulation unit 104 for performing a modulation process on transmission data output from the ltiple access processing unit to obtain a π / 4 QPSK signal.

Further, telephone set 100 selects predetermined downlink slot data from received data (time-division multiplexed data of a plurality of slots) output from digital modulation / demodulation section 104 and separates the data into control data and compressed voice data. In addition, a TDMA for multiplexing compressed audio data output from an audio codec unit described later and control data output from the control unit 101 into a preset uplink slot.
It has a processing unit 105.

The telephone 100 includes a TDMA processing unit 1
In addition to performing decoding processing (including error correction processing) on the compressed audio data output from the receiver 05 to obtain a received audio signal, compression encoding processing (including error correction code addition processing) is performed on the transmission audio signal. ) To obtain compressed audio data, and an audio codec 1
06, a low-frequency amplifier 107 for amplifying the received audio signal output from the amplifier 106, a speaker 108 for outputting a sound based on the audio signal output from the amplifier 107, a microphone 109 for a transmitter, and a microphone 10 for the microphone 10.
Low-frequency amplifier 11 which amplifies the audio signal output from 9 and supplies it to audio codec section 106 as a transmission audio signal
0.

The telephone 100 has an operation unit 115 for the user to perform various key operations, a display unit 116 composed of a liquid crystal display and the like, and a non-volatile memory for storing redial data and telephone directory data. And a ring tone output unit 118 that outputs a ring tone under the control of the control unit 101 when an incoming call is received. The operation unit 115, the display unit 116, the nonvolatile memory 117, and the ringer output unit 118 are connected to the control unit 101, respectively.

Here, the operation unit 115 includes a call key for instructing a call or answering an incoming call, an end key for ending a call, a numeric keypad for inputting a telephone number, redial data, A key for searching telephone directory data, a registration key for shifting to a telephone directory registration mode, and the like are provided. The display unit 116 displays, in addition to the state of the system, redial data and telephone directory data selected in the search for redial data and telephone directory data, telephone numbers input with ten keys, and the like.

The control unit 101 has a clock circuit 120 for obtaining the current time. Although not described above, the operation unit 115 is provided with a key for adjusting the time of the clock circuit 120, and the display unit 116 displays the time of the clock circuit 120.

Next, the operation of the telephone 100 shown in FIG. 1 will be described.

When the power is turned on, the control channel is out of synchronization with the control channel. Thus, the control channel transmitted from the base station is received and the synchronization with the control channel is established.
Thereafter, location registration that the user is in the area of the base station is performed. This location registration is performed using a call channel. After the location registration is completed, the mobile station returns to the control channel reception state and enters the standby state.

FIG. 2 shows a configuration example of a logical control channel (LCCH). However, the first of the TDMA frame
This is an example in which slots are allocated to a logical control channel (LCCH), and an LCCH superframe is composed of m intermittent transmission slots for each nTDMA frame.

The base station (CS) uses four slots for downlink (transmission) and four slots for uplink (reception).
The slot forms a 5 [ms] TDMA frame. And a downlink logical control channel (LCCH)
Exist for every nTDMA frame. That is, the downlink intermittent transmission cycle is 5 × n [ms].

The minimum period (5 × n × m [ms]) of the downlink logical control channel (LCCH) that specifies the slot positions of all LCCH elements is defined as an LCCH superframe. Downlink logical control channel (LCCH)
Is composed of a broadcast channel (BCCH), a paging channel (PCH), and an individual cell channel (SCCH). The BCCH is transmitted in the first slot of the LCCH super frame.
Is notified. On the other hand, the uplink logical control channel (LCCH) is configured by an individual cell channel (SCCH). The slot position of the uplink logical control channel (LCCH) is determined by the control carrier configuration information element in the radio channel information broadcast message on the BCCH.
The mobile station (PS) is notified from S).

FIG. 3 shows the configuration of the BCCH. B
CCH is a downlink one-way channel for broadcasting control information from CS to PS. The BCCH transfers information about the channel structure, system information, and the like.

The BCCH has a preamble pattern (P
R), a unique word for synchronization (UN), a channel type code (CI), a source identification code, data (BCCH), and a cyclic error detection code (CRC). The calling identification code is composed of a carrier identification code, a paging area number, and an additional ID. In addition, data (BCCH)
Is composed of octet 1 to octet 8. The lower 7 bits of octet 1 indicate the type of message by octet 2 to octet 8.

FIG. 4 shows the configuration of the SCCH. S
CCH is a point-to-point bidirectional channel that transfers information required for call connection between CS and PS. This S
In the CCH, independent information is transferred for each cell.

The SCCH has a preamble pattern (P
R), a unique word for synchronization (UN), a channel type code (CI), a calling identification code, a destination identification code, and data (SC).
CH) and a cyclic error detection code (CRC). In the SCCH (downlink), the calling identification code is composed of a carrier identification code, a paging area number and an additional ID, and the destination identification code is composed of a PS calling code (PS-ID). Although not shown, on the SCCH (uplink), the above-described calling identification code is a called identification code, and the above-mentioned called identification code is a calling identification code. The data (SCCH) is
It is composed of octet 1 to octet 5. The lower 7 bits of octet 1 indicate the type of message by octet 2 to octet 5.

The PCH is a point-multipoint downlink one-way channel for simultaneously transferring the same information from a CS to a PS to a single cell or a wide area (paging area) of a plurality of cells. With this PCH, C
S notifies the PS that there is an incoming call. As shown in FIG. 2, a plurality of PCHs are included in the LCCH superframe.
CH (PCH1 to PCHn) exists.

FIG. 5 shows the configuration of the PCH. PC
H is a preamble pattern (PR), a unique word for synchronization (UN), a channel type code (CI), a calling identification code, data (PCH), and a cyclic error detection code (CR).
C). The calling identification code is composed of a carrier identification code, a paging area number, and an additional ID. The data (PCH) includes octet 1 to octet 8.

In this case, since the PCH defines only a single message, there is no area indicating the message type. 5 to 7 bits of octet 1, no call, BCD 13 digit or less PS number call service, hexadecimal 7 digit PS
A call service type such as a call service by number is displayed. The PS number is indicated by octets 1 to 7. Further, octet 8 instructs reception of a broadcast channel (BCCH). If a change occurs during intermittent reception, which will be described later, the PS receives the BCCH according to the reception instruction.

The PS recognizes a PCH to be received from a plurality of PCHs (PCH1 to PCHn) based on a paging group number. The PS is based on the PS number and the content of the BCCH (n _PCH , n _GROUP , control carrier configuration) from the CS,
The incoming call group number is calculated by equation (1). here,
n _PCH is the number of the same incoming call group, and n _GROUP is the incoming group factor. X = 2 when the incoming groups of the PCH are related to each other using two frequencies (2LCCH), and X = 1 otherwise. Incoming call group number = (PS number) MOD (n _PCH xn _GROUP x) +1 (1)

As described above, after the location registration is completed, the state returns to the control channel receiving state and the apparatus enters the standby state. In this standby state, the telephone (PS) 10 shifts to intermittent reception in which it receives only the PCH corresponding to the calculated paging group number. In this case, since the PCH corresponding to the calculated paging group number exists for each LCCH superframe, in the conventional standby state, intermittent reception is performed, for example, every 1.2 seconds.

FIG. 6 shows the operation of intermittent reception of the PCH in the standby state. It is assumed that the PCH corresponding to the destination group number is PCHa. First, the control channel is continuously received to receive the BCCH. It calculates its own paging group number from the information in the BCCH, calculates the reception timing based on the paging group number, and
Receives Ha. After that, only PCHa is intermittently received at a fixed reception timing.

The operation for making a call will be described.
In this case, for example, if a telephone number of the other party is input by key operation of the operation unit 115 or a call key is operated after searching redial data or telephone directory data, a calling process is performed. That is, telephone number data and the like are supplied as control data from the control unit 101 to the TDMA processing unit 105 and transmitted to the base station through a control channel. As a result, the line connection with the other party is established, and a call is made possible.

Here, the communication is performed using the communication channel, but the data of the communication frequency and the slot position of the communication channel are transmitted as control data from the base station using the control channel during the line connection processing, and the TDMA processing is performed. The information is supplied from the unit 105 to the control unit 101. Control unit 101
Controls the radio unit 103 based on the communication frequency data so that the transmission / reception frequency matches the communication frequency of the communication channel, and sets the TD based on the slot position data.
The slot selected by the MA processing unit 105 is set. Therefore, the call is made using the call channel notified from the base station.

Here, with reference to FIG. 7, the configuration of a communication physical slot during a call will be described. Base station (CS)
Are 4 [down (transmission) slots and 4 subsequent up (reception) slots, 5 [m
s]. PS is each TD
In the MA frame, data is transmitted to the CS in an uplink setting slot, and data in a downlink setting slot is received data.

Also, paging data is transmitted as control data from the base station using the control channel, and this paging data is supplied from the TDMA processing unit 105 to the control unit 101, and when an incoming call is detected, the control unit 101 The ringing tone output section 118 is controlled to output a ringing tone.

While this calling operation is being performed,
When the call key is operated and there is a response, response data is supplied from the control unit 101 as control data to the TDMA processing unit 105 and transmitted to the base station via the control channel. As a result, the line connection with the other party is established, and a call is made possible. Also in this case, the communication is performed using the communication channel notified from the base station.

In the talking state, the TDMA processing unit 105 outputs the compressed voice data transmitted through the talking channel. The compressed audio data is supplied to the audio codec unit 106, where it is converted into an analog signal after being subjected to a decoding process. Then, the received audio signal output from the audio codec unit 106 is transmitted to the speaker 10 via the amplifier 107.
8 and the speaker 108 outputs a sound based on the received sound signal.

The transmission audio signal output from the microphone 109 is amplified by the amplifier 110, supplied to the audio codec unit 106, converted into a digital signal, and then compression-encoded to form compressed audio data. . Then, the compressed audio data output from the audio codec unit 106 is supplied to the TDMA processing unit 105, and transmitted to the other party through the communication channel.

Next, using the flowchart of FIG.
The automatic time adjustment operation of the clock circuit 120 of the control unit 101 will be described. In this case, it is assumed that the time information is included in all or a part of the PCH (slot data) intermittently received in the standby state.

In the standby state, first, in step ST1, n is set to 0, and in step ST2, a PCH corresponding to its own destination group number is received. Then, in step ST3, it is determined whether or not the received PCH has incoming information. If the own PS number is allocated as data, it is determined that there is incoming information, and step ST4 is performed.
To process incoming calls. On the other hand, if there is no incoming information, n is incremented in step ST5, and
At 6, it is determined whether or not n = Nt. Where Nt
Is a fixed numerical value giving the timing of adjusting the time of the clock circuit 120.

If not n = Nt, the process returns to step ST2, not at the time adjustment timing, and receives the next PCH corresponding to its own paging group number. On the other hand, n = Nt
Since the time is the time adjustment timing of the clock circuit 120, it is determined in step ST7 whether or not the received PCH has time information (date and time information). If there is no time information, it is impossible to adjust the time of the clock circuit 120, so the process returns to step ST1 to perform the same operation as described above. On the other hand, if there is time information, the clock circuit 120 is used in step ST8 by using the time information.
Is adjusted, and the process returns to step ST1.

FIG. 9A shows the intermittent reception timing, and FIG.
B is the reception timing of the time information, and FIG.
The example of the adjustment timing of the time of 0 is shown. PCHa
Is the PCH corresponding to its own paging group number.

As described above, in the present embodiment, the time information is obtained from the PCH intermittently received in the standby state, and the time information is obtained based on the time information.
Time is automatically adjusted. Therefore, there is no need for the user to adjust the time of the clock circuit 120, and there is an advantage that usability is improved.

In the above embodiment, the time information is obtained from the PCH intermittently received in the standby state. However, the time information reception instruction information is obtained from the PCH intermittently received in the standby state. Detected and received in the predetermined slot data (PC
H) Time information may be acquired from H).

FIG. 10 is a flowchart showing the automatic time adjustment operation of the clock circuit 120 in that case. In this case, the PCH intermittently received in the standby state
It is assumed that the time information reception instruction information is included in a part of (slot data), and the time information is included in the data (PCH) of the slot specified by the reception instruction information.

In the standby state, first, in step ST11, a PCH corresponding to its own destination group number is received. Then, in step ST12, it is determined whether or not the received PCH has incoming information. When the own PS number is allocated as data, it is determined that there is incoming information, and in step ST13, incoming processing is performed. On the other hand, when there is no incoming information, it is determined in step ST14 whether or not there is reception instruction information of time information.

If there is no reception instruction information, step ST
11, and returns to the next PCH corresponding to the own paging group number.
To receive. On the other hand, when there is reception instruction information, in step ST15, the data of the slot designated by the reception instruction information is received, and time information is obtained. Then, in step ST16, using the time information, the clock circuit 120
Is adjusted, and the process returns to step ST11.

FIG. 11A shows the intermittent reception timing, FIG. 11B shows the reception timing of the time information reception instruction information, and FIG.
1C shows an example of the time information reception timing, and FIG. 11D shows an example of the time adjustment timing of the clock circuit 120. PC
Ha indicates the PCH corresponding to its own paging group number, and PCHb indicates the data (PCH) of the slot specified by the reception instruction information.

In the above embodiment, the time information is obtained from the PCH or the like intermittently received in the standby state and the time of the clock circuit 120 is adjusted. Get the clock circuit 1
The time of 20 may be adjusted. The flowchart of FIG. 12 shows the time adjustment operation of the clock circuit 120 in that case. In a call state, data of a downlink slot is sequentially received, and data of a preset slot is selectively used as reception data, and time information is included in a part of the reception data. .

In a call state, first, in step ST
In step ST22, n is set to 0, and in step ST22, data is transmitted in a preset uplink slot.
At 23, data of a preset downlink slot is obtained as received data. Then, in step ST24, n is incremented, and in step ST25, it is determined whether or not n = Nt. Here, Nt is a constant numerical value giving the timing of adjusting the time of the clock circuit 120.

If not n = Nt, the process returns to step ST22 instead of the time adjustment timing, and receives the next PCH corresponding to the own paging group number. On the other hand, n = N
When it is t, it is the time adjustment timing of the clock circuit 120, and therefore, in step ST26, it is determined whether or not the received data includes time information (date and time information). If there is no time information, it is impossible to adjust the time of the clock circuit 120, so the flow returns to step ST21 to perform the same operation as described above. On the other hand, if there is time information, the clock circuit 1 is used in step ST27 using the time information.
The time at 20 is adjusted, and the process returns to step ST21.

FIG. 13A shows the data transmission timing, FIG. 13B shows the reception data obtaining timing, and FIG. 13C
13D is the reception timing of the time information, and FIG.
The example of the adjustment timing of the time of 0 is shown.

In the above embodiment, the time information is obtained from the data received during a call. However, the time information reception instruction information is detected from the received data, and the time information of the slot indicated by the instruction information is detected. Time information may be obtained from data.

FIG. 14 is a flowchart showing the automatic time adjustment operation of the clock circuit 120 in that case. In this case, it is assumed that the time information reception instruction information is included in a part of the reception data at the time of the call, and the time information is included in the data of the slot specified by the reception instruction information.

In the call state, first, in step ST
In step 31, data is transmitted in a preset uplink slot, and in step ST32, data in a preset downlink slot is obtained as received data. And step S
At T33, it is determined whether or not the reception data includes reception instruction information of time information.

If there is no reception instruction information, step ST
Returning to 31, the same operation as described above is performed in the next TDMA frame. On the other hand, if there is reception instruction information, in step ST34, time information is obtained from the data of the slot indicated by the reception instruction information. And step ST
At 35, the time of the clock circuit 120 is adjusted using the time information, and the process returns to step ST31.

FIG. 15A is a timing for transmitting data, FIG. 15B is a timing for obtaining received data, and FIG.
15D is the reception timing of the time information reception instruction information, FIG. 15D is the reception timing of the time information, and FIG.
3 shows an example of the time adjustment timing.

As shown in the flowcharts of FIGS. 12 and 14, according to the method of adjusting the time of the clock circuit 120 by obtaining time information from received data or the like during a call, the time adjustment affects current consumption. Do not give. This is because the internal circuit is always in the normal mode other than the low current consumption mode during a call, so that even if time information is obtained from received data or the like to adjust the time of the clock circuit, the current consumption is not affected. On the other hand, as shown in the flowcharts of FIGS. 8 and 10, time information is obtained from the slot data (PCH) or the like intermittently received in the standby state and the clock circuit 1
Adjusting the time of 20 may increase current consumption. This is because, when slot data is intermittently received during standby, the internal circuit is generally in the low current consumption mode between receptions, but the operation of adjusting the time of the clock circuit 120 is performed. In addition, it is necessary to set the internal circuit to a normal mode other than the low current consumption mode.

In the above-described embodiment, telephone (PS) 100 is connected to base station (CS) during standby or during a call.
The time information sent from the
However, the telephone 100 may actively request the transmission of the time information from the base station or the center that provides the time information. For example, it is conceivable to make a call requesting transmission of time information and request transmission of time information.

FIG. 16 shows a control sequence for explaining the operation of the telephone (PS) 100 and the base station (CS) when a calling operation for requesting time information is performed. A call operation by a user requesting time information on the telephone 100;
Alternatively, when there is an automatic calling operation for requesting time information at a specified time interval, a connection request for shifting to a communication channel is transmitted from telephone set 100 to the base station. Then, the communication channel is switched to the communication channel, and after the synchronization is established, the telephone set 100 transmits a call request for requesting time information to the base station.

Normally, the call request includes, as shown in FIG. 17, a calling telephone number (calling telephone number), which is the telephone number of the caller, a calling subaddress associated with the calling telephone number, and a calling destination. The destination telephone number (called number), which is the telephone number of the (receiving side), and a destination subaddress attached to the called telephone number are included. For outgoing calls that require time information, the destination telephone number of the outgoing request is the telephone number of the center that provides the time information or a special telephone number, and it can be identified that the call requires time information. It is said. As yet another example, identification data indicating a call requesting transmission of time information may be arranged in a destination subaddress portion associated with a called telephone number.

When the destination telephone number of the call request is the telephone number of the center providing the time information, the time information is transmitted from this center to the telephone set 100 via the base station. Also, if the called party's telephone number in the call request is a special telephone number, or if identification data indicating that it is a call requesting transmission of time information is provided in the called subaddress part, for example, the telephone is directly sent from the base station. The time information is transmitted to 100. Thus, the time information is transmitted from the base station to the telephone 10.
After the transmission to 0, the line is disconnected and the telephone 100 returns to the standby state.

The flow chart of FIG. 18 shows the operation of the telephone set 100 for making a call requesting time information, acquiring the transmitted time information, and adjusting the time of the clock circuit 120.

First, in response to a call operation by a user requesting time information or an automatic call operation requesting time information at a specified time interval, a connection request is transmitted to the base station in step ST41. In ST42, it is determined whether or not synchronization on the communication channel has been established. Then, after the synchronization is established, in step ST43, a call request relating to the time information request is transmitted to the base station.

Then, in step ST44, it is determined whether or not time information has been received, and in step ST45, it is determined whether or not a predetermined time has elapsed since the call request was made. If the predetermined time has elapsed in step ST45, the line is disconnected in step ST46, and a standby state is set in step ST47. When the time information is received in step ST44, the time of the clock circuit 120 is adjusted using the time information in step ST48.
Proceed to.

In addition, it is also conceivable to adjust the time of the clock circuit 120 by acquiring time information from a call setup message (time information reception request) sent from the base station at the time of an incoming call. FIG. 19 shows a control sequence for explaining operations of the time information telephone (PS) 100 and the base station (CS) at that time.

At the time of an incoming call, an incoming call request is transmitted from the base station (CS) to the telephone set (PS) 100. On the other hand, the telephone 100 transmits a connection request to shift to the communication channel to the base station. Then, after switching to the communication channel and establishing synchronization, the telephone 100 outputs the ringing tone output section 118. When the user answers, the telephone 100 transmits an incoming call response to the base station. You. Then, a call setting message (time information reception request) is transmitted from the base station to telephone set 100.

Normally, as shown in FIG. 17, the call setting message includes a calling telephone number (calling telephone number), which is the telephone number of the caller, and a call setting message, as well as the call request. It includes a calling subaddress, a called telephone number (called number) which is a telephone number of a calling destination (called side), and a called subaddress attached to the called telephone number. In the above-described call setting message (time information reception request), for example, the calling telephone number of the call setting message is a special telephone number instructing the reception of time information, and the time information is allocated to the calling subaddress, or Information instructing reception of time information is provided in the sub-address portion, and time information is provided in the destination sub-address portion.

If the calling telephone number in the call setting message is a special telephone number for instructing time information reception, the telephone 1
00 adjusts the time of the clock circuit 120 based on the time information provided in the calling subaddress portion of the call setting message. Further, when the information instructing the reception of the time information is arranged in the calling sub-address portion of the call setting message, the telephone set 100 uses the time information arranged in the destination sub-address portion of the call setting message to determine the time of the clock circuit 120. Make adjustments. As described above, after the call setting message (time information reception request) is transmitted from the base station to the telephone set 100, the line is disconnected, and the telephone set 100 returns to a standby state.

FIG. 20 is a flowchart showing the operation of telephone 100 when there is an incoming call in a standby state. First, in step 51, it is determined whether there is an incoming call request from the base station. If there is an incoming call request, step S
At T52, a connection request is transmitted to the base station, and a step ST5
At 3, it is determined whether or not synchronization on the communication channel has been established. After the synchronization is established, a ringing tone is output from the ringing tone output unit 118 in step ST54. Then, in a step ST55, it is determined whether or not there is a response operation by the user, and in a step ST56, it is determined whether or not the calling side disconnects the line.

If the calling side disconnects the line in step ST56, the line is disconnected in step ST57, and the apparatus is set in a standby state in step ST58. Step ST5
If there is a response operation by the user in step S5, step S
At T59, an incoming call response is transmitted to the base station. Then, in step ST60, it is determined whether or not the call setup message sent from the base station in response to the incoming call response is related to the time information reception request. If the call setup message does not relate to the time information reception request, the process proceeds to step ST61.
Then, a call is made possible.

On the other hand, if the call setup message is related to the time information reception request, step ST62
Then, the time of the clock circuit 120 is adjusted using the time information included in the call setting message, and the process proceeds to step ST57.
Proceed to.

In the above-described embodiment, the communication terminal device is a simple portable telephone. However, it goes without saying that the present invention can be similarly applied to other communication terminal devices.

[0075]

According to the present invention, the time information is obtained from the signal transmitted through the communication line, and the time of the clock circuit is automatically adjusted based on the time information. Time adjustment is not required, and there is an advantage that usability is improved.

[Brief description of the drawings]

FIG. 1 shows a simplified portable telephone (PH) as an embodiment.
It is a block diagram which shows the structure of S).

FIG. 2 is a diagram illustrating a configuration of a logical control channel (LCCH).

FIG. 3 is a diagram showing a configuration of a BCCH.

FIG. 4 is a diagram illustrating a configuration of an SCCH.

FIG. 5 is a diagram showing a configuration of a PCH.

FIG. 6 is a diagram illustrating an operation of intermittent reception of a PCH in a standby state.

FIG. 7 is a diagram illustrating a configuration of a communication physical slot during a call;

FIG. 8 is a flowchart illustrating an example of an automatic time adjustment operation of the clock circuit.

FIG. 9 is a diagram illustrating a timing example of intermittent reception of PCH, reception of time information, and time adjustment.

FIG. 10 is a flowchart showing another example of the automatic time adjustment operation of the clock circuit.

FIG. 11 is a diagram illustrating an example of timings of PCH intermittent reception, time information reception instruction information reception, time information reception, and time adjustment.

FIG. 12 is a flowchart showing another example of the automatic time adjustment operation of the clock circuit.

FIG. 13 is a diagram illustrating a timing example of data transmission, reception data acquisition, time information reception, and time adjustment.

FIG. 14 is a flowchart illustrating another example of the automatic time adjustment operation of the clock circuit.

FIG. 15 is a diagram showing a timing example of data transmission, reception data acquisition, time information reception instruction information reception, time information reception, and time adjustment.

FIG. 16 is a control sequence diagram showing an operation example of a telephone and a base station when a time information request call is made.

FIG. 17 is a diagram showing a partial configuration of a call request and a call setting message.

FIG. 18 is a flowchart showing an operation of automatically adjusting the time of the clock circuit in response to a call requesting time information.

FIG. 19 is a control sequence diagram showing an operation example of a telephone set and a base station when a call is received.

FIG. 20 is a flowchart showing an automatic adjustment operation of the time of the clock circuit at the time of an incoming call.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Simplified mobile phone 101 Control unit 102 Transmission / reception antenna 103 Radio unit 104 Digital modulation / demodulation unit 105 TDMA processing unit 106 Audio codec unit 107, 110 Low frequency amplifier 108 Speaker 109 Microphone 115 Operation unit 116 Display unit 117 Nonvolatile memory 118 Call Sound output unit 120 Clock circuit

Claims (7)

[Claims] A clock circuit; time information obtaining means for obtaining time information from a signal transmitted through a communication line; and a time of the clock circuit based on the time information obtained by the time information obtaining means. A communication terminal device comprising: clock adjustment means for adjusting. 2. The communication apparatus according to claim 1, further comprising a receiving unit that intermittently receives slot data transmitted through the communication line during a standby state, wherein the time information obtaining unit obtains the slot data from the slot data intermittently received by the receiving unit. The communication terminal device according to claim 1, wherein time information is acquired. 3. A reception means for intermittently receiving slot data transmitted through the communication line during standby, wherein the time information acquisition means is included in the slot data intermittently received by the reception means. 2. The communication terminal device according to claim 1, wherein said time information is obtained from data of a predetermined slot received by said receiving means based on said time information reception instruction information. 4. A time information obtaining means, further comprising: receiving means for receiving slot data sequentially transmitted through the communication line during a call, and selectively using data of a preset slot as received data; The communication terminal device according to claim 1, wherein the time information is obtained from the received data. 5. A time information obtaining means for receiving slot data sequentially transmitted through the communication line during a call, and selectively using data of a preset slot as reception data. 2. The communication terminal device according to claim 1, wherein the time information is acquired from data of a predetermined slot received by the receiving means based on time information reception instruction information included in the received data. 6. The communication apparatus according to claim 1, further comprising: a call control unit configured to perform a call requesting transmission of the time information, wherein the time information acquisition unit transmits the time information via the communication line in response to the call. The communication terminal device according to claim 1, wherein the time information is obtained. 7. The communication terminal device according to claim 1, wherein said time information obtaining means obtains said time information from a call setting message sent over said communication line when a call is received.