JP2001238265A - Wireless phone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless phone system comprising a master unit and slave units that can reduce current consumption by decreasing a reception period during a standby state for an inter-slave-unit direct speech communication. SOLUTION: In the wireless phone system where direct communications between wireless phones registered in a master unit having a function of transmitting a control channel by each of slots having a predetermined interval are attained, when a signal for an inter-slave-set direct speech is used to call another slave unit, the caller uses a slot deviated by predetermined timing from a control channel awaited by the opposite slave unit on the basis of the control channel sent from the master unit. Furthermore, the slave unit in a standby state receives the signal for the inter-slave-set direct speech with the slot deviated by the predetermined timing from the control channel during the standby on the basis of the control channel sent from the master unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone device registered as a master unit, and more particularly to direct communication between slave units.

[0002]

2. Description of the Related Art Conventionally, this type of wireless telephone device is provided with a direct communication function between slave units for making a direct call between slave units.
By registering the master unit, direct communication between the slave units can be performed only between the slave units registered with the same master unit.

[0003] For example, a PHS that performs transmission and reception at the same frequency, divides the time of 5 msec into four transmission slots and four reception slots, and performs time division multiplexing (TDMA).

[0004] When making a direct telephone call between slave units in the above PHS,
When a calling operation is performed, the calling side performs carrier sense, transmits a call signal to the called side at a frequency that satisfies a certain condition among the frequencies allocated for direct communication between slave units, and receives a call. The transmission is continued until the call response signal from the side is received or the time limit expires. If a call response is received within the time limit, the call is shifted to a call. If the time limit is exceeded, the called side is determined to be busy. The standby slave unit receives all the frequencies allocated for direct communication between the slave units sequentially in a long section. Then, upon receiving the call signal, the mobile station transmits an incoming call response signal to the calling side and shifts to a call.

[0005]

By the way, in the above-mentioned direct communication between the slave units, when a calling operation is performed, carrier sense is performed, and of the frequencies allocated for the direct communication between the slave units,
A paging signal is transmitted to the receiving side at a frequency satisfying a certain condition. Since the transmission timing at this time is uncertain, the waiting slave unit needs to continue to receive a signal for direct communication between the slave units in a long section in order to receive the calling signal from the calling side, and thus the The current increases. Further, since the transmitted frequency is determined at the time of performing the calling operation, it is necessary to continuously receive all the frequencies allocated for the direct communication between the slave units in order in a long section, and the current consumption increases. .

On the other hand, since the calling side transmits the calling signal at an undefined timing, it is necessary to continuously output the calling signal at short intervals, and the current consumption increases. Also,
If the frequency of the calling signal being transmitted is different from the frequency being received by the called side, it takes time until reception starts at the same frequency as the calling signal. In the meantime, it is necessary to keep transmitting the calling signal, so that the current consumption increases.

The present invention takes into account the above-mentioned conventional problems and makes it possible to shorten the transmission section of a direct telephone call between slave units and the reception section of a waiting signal, thereby reducing current consumption on both the calling side and the standby side. It is another object of the present invention to provide a wireless telephone device capable of shortening the time from the start of a call to the response to a call signal.

[0008]

In order to achieve the above object, the present invention divides a predetermined frame into equal parts,
In a wireless system that performs communication using a time division multiplexing method in which a transmission signal and a reception signal are multiplexed and communicated in each equally divided slot, a reference signal serving as a timing reference for each slot at a predetermined interval. And a plurality of control channels in a specific order and a plurality of control channels registered in the master unit having a function of transmitting a call signal on a specific control channel determined from a number unique to a wireless telephone device. A wireless telephone device that is a standby wireless telephone device and that is capable of direct communication between wireless telephone devices. When a calling operation is performed, a remote telephone device of a partner telephone device is determined based on a control channel transmitted from the parent device. It is assumed that the wireless telephone apparatus transmits data in a slot shifted by a predetermined timing from the reception timing of the control channel to be awaited, thereby extending the transmission interval.

Further, according to the present invention, in the above-mentioned radio telephone apparatus, when a calling operation is performed, a slot shifted from a reception timing of a control channel, which is transmitted from the master unit and waits for a partner slave unit, by a predetermined timing. Thus, by transmitting a plurality of frequencies in a predetermined order in a plurality of slots, a configuration is made to reduce a paging signal transmission time up to the establishment of a direct communication between slave units.

The present invention also relates to a radio telephone apparatus capable of performing direct communication between the radio telephone apparatuses, wherein the radio telephone apparatus determines in advance a control channel waiting for a call based on a control channel transmitted from a base unit. By receiving a signal for direct communication between slave units in a slot shifted by the given timing, a reception section is shortened.

Further, according to the present invention, in the wireless telephone apparatus, based on a control channel transmitted from a base unit, a plurality of frequencies are shifted by a predetermined timing from a control channel waiting for a call. By receiving in multiple slots in a fixed order,
The receiving section is configured to be short.

According to the present invention, since the transmission interval in the direct communication between the slave units is long and the reception interval is short,
Current consumption can be reduced, and the time until a call is answered can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention relates to a case in which a predetermined frame is equally divided and a transmission signal and a reception signal are multiplexed in each equally divided slot for communication. In a wireless system that performs communication using the division multiplexing method, a wireless telephone capable of direct communication between wireless telephone devices registered in a base unit and having a function of transmitting a control channel for each slot at a predetermined interval An apparatus, comprising: an antenna that transmits and receives a radio signal; a receiving unit that demodulates a received signal input from the antenna and outputs demodulated data; and a transmitting unit that modulates transmission data and outputs modulated data to the antenna. When the wireless unit and the receiving unit receive the control channel transmitted from the master unit, the wireless unit and the receiving unit perform timing at predetermined timing based on the timing of the received control channel of the master unit. A timing generation unit that generates and outputs a timing signal, a frequency storage unit that stores a transmission / reception frequency when performing direct communication with another wireless telephone device registered in the base unit, and a wireless communication unit that is registered in the base unit. When calling the direct communication of the telephone device, the receiving unit receives the control channel transmitted from the master unit, and determines the timing of the transmission / reception slot of the direct communication based on the timing signal output from the timing generation unit, Selects the frequency stored in the frequency storage unit at the determined transmission / reception slot that is deviated from the control channel reception timing at which the other handset waits for a call determined by the number unique to the wireless telephone device, and calls the direct call. And a communication control unit that controls the radio unit so as to perform the transmission. It has the effect of that.

According to a second aspect of the present invention, in the wireless telephone apparatus according to the first aspect, when a direct communication call is made, the call is stored in the frequency storage unit in a predetermined order and at an interval. A wireless telephone device that controls transmission and reception in a plurality of slots at a plurality of frequencies, and has an effect of shortening a paging signal transmission time required for establishing a direct call between slave units.

According to a third aspect of the present invention, there is provided a time-division multiplexing system in which a predetermined frame is equally divided and a transmission signal and a reception signal are multiplexed in each of the equally divided slots for communication. In a wireless system that performs communication using a wireless telephone device, a wireless telephone device capable of direct communication between wireless telephone devices registered in a base unit and having a function of transmitting a control channel for each slot at a predetermined interval is provided. ,
An antenna for transmitting and receiving a radio signal, a receiving unit for demodulating a received signal input from the antenna and outputting demodulated data,
A radio unit having a transmission unit that modulates transmission data and outputs the modulation data to an antenna, and a control unit that receives a control channel transmitted from a master unit at a reception unit, based on a timing of the received control channel of the master unit. A timing generation unit that generates and outputs a timing signal at a predetermined timing; a frequency storage unit that stores a transmission / reception frequency when performing direct communication with another wireless telephone device registered in the master unit; When waiting for a direct communication call from another registered wireless telephone device, the receiving unit receives the control channel transmitted from the master unit, and transmits and receives the direct communication based on the timing signal output from the timing generating unit. The timing of the slot is determined, and the determined reception timing deviated from the reception timing of the control channel waiting for the call determined by the number specific to the wireless telephone device. A communication control unit for selecting a frequency stored in the frequency storage unit in the slot and controlling the wireless unit so as to receive a call signal of a direct call, and shortens a reception interval during standby. Has the effect of being able to

According to a fourth aspect of the present invention, in the wireless telephone apparatus according to the third aspect, based on a control channel transmitted from the base unit, a control channel for waiting for a call is predetermined. A plurality of frequencies are received in a plurality of slots in a predetermined order in a slot shifted by the timing, and an effect of shortening a waiting reception section can be obtained. Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a block diagram of a radio telephone apparatus according to Embodiment 1 of the present invention.

In FIG. 1, an antenna 11 receives a signal transmitted from a base unit or another wireless telephone device, and supplies a received signal to a radio unit 12. In addition, it transmits the transmission signal supplied from wireless section 12 to the base unit and other wireless telephone devices. The radio unit 12 amplifies the received signal supplied from the antenna 11 and supplies the amplified signal to the frequency conversion circuit, and demodulates the received data from the signal supplied from the frequency conversion circuit and supplies it to the communication control unit 13. A modulation unit that modulates transmission data supplied from the communication control unit 13 and supplies a signal to a frequency conversion circuit;
A transmission unit having a transmission signal amplification circuit that amplifies the transmission signal supplied from the frequency conversion circuit and supplies the signal to the antenna 11;
It has a frequency conversion circuit that converts a transmission / reception signal supplied from a reception signal amplification circuit or a transmission signal amplification circuit to a predetermined frequency. The communication control unit 13 performs transmission / reception processing of call data and control data. In addition, in order to perform transmission / reception processing by the TDMA method, the transmission / reception timing is controlled based on the timing supplied from the timing generation unit 14 and the transmission / reception frequency is controlled by the frequency data supplied from the frequency storage unit 15. ing. The timing generation unit 14 generates a predetermined timing from the reception timing of the control channel transmitted from the master unit for each slot at a predetermined interval, and supplies the generated timing to the communication control unit. The frequency storage unit 15 stores a frequency for communication with the base unit or another wireless telephone device, and supplies frequency data to the communication control unit. The audio control unit 16 converts the analog audio signal supplied from the microphone 18 into a digital signal and encodes the digital signal.
3 to the wireless unit 12. The communication control unit 1
The audio data is decoded from the demodulated data supplied from the wireless unit 12 via the wireless communication unit 3, converted into an analog audio signal, and supplied to the speaker 17. The speaker 17 outputs an analog audio signal supplied from the audio control unit. The microphone 18 picks up the voice, converts the voice into an analog voice signal, and supplies the analog voice signal to the voice control unit 16. The key input unit 19 supplies operation information to the man-machine interface unit 20. The man-machine interface unit 20 supplies the operation information supplied from the key input unit 19 to the communication control unit 13 and the display unit 24
The operation information is supplied to. The display unit 24 displays the operation information supplied from the man-machine interface unit 20.

Next, an example of the operation when the wireless telephone device having the above configuration is applied to a PHS will be described with reference to FIG. By setting the standby mode, the wireless telephone device having the above configuration can select one of three standby states: public standby, self-employed standby, and direct telephone standby between slave units. However, in the self-employed standby and the direct call standby between the slaves, the limitation is limited to the slaves registered as the master.

FIG. 2 is an explanatory view showing a state in which a direct telephone call is made between the slave units during self-employed standby in the wireless telephone device according to the present invention. FIG. 1 is a first embodiment of the present invention.
3 shows an example of timing of the embodiment configured by the blocks shown in FIG.

In FIG. 2, reference numeral 21 denotes a master unit, 22 denotes a slave unit 1, and 23 denotes a transmission / reception state of the slave unit 2. The master unit shown in FIG. 21 transmits a reference signal serving as a timing reference and a plurality of control channels (shown as CCH1 and CCH2 in FIG. 2) in a specific order for each slot at a predetermined interval.
Sending in configuration. The base unit 21 notifies the extension unit or the like to the extension unit using the control channel, and the control channel used for the notification includes CCH1 and CCH1 according to the extension number of the extension unit to be called, such as the extension number of the extension unit. CCH2
Is selected. For example, when calling an extension having an odd number, a call is made on CCH1, and when calling an extension having an even number, CC is called.
Make a call at H2. When performing standby for the parent device, the child device 1 and the child device 2 shown in 22 and 23 are wireless telephone devices out of a plurality of control channels transmitted from the parent device shown in 21 for each slot at a predetermined interval. Receives a specific control channel determined by a unique number and waits for a call. FIG. 2 shows an example in which the slave 1 receives CCH1 used when the master calls the slave 1, and similarly, the slave 2 receives CCH2 used when the master calls the slave 2. Is shown.

The handset 1 and handset 2 are provided for each slot at a predetermined interval from the base unit 21 shown in FIG. Based on the transmitted control channel,
In a standby mode determined by a number unique to the wireless telephone device, a signal for direct communication between slave units is received in a slot shifted from a specific control channel by a predetermined timing t, and a call for direct communication between slave units is received. Is also waiting. At this time, the frequencies stored in the frequency storage unit 15 are sequentially selected as the standby frequency, and reception at one frequency is performed at the above timing.

Here, when a calling operation for calling the slaves 1 to 23 shown in 22 in the direct talk mode between the slaves is performed, the slave 1 shown in 22 is placed between the master and the slave. Stops waiting for a direct call, and, among a plurality of control channels transmitted from the master unit at intervals of a predetermined interval from the master unit indicated by 21, a unique wireless telephone device corresponding to the slave unit 2 indicated by 23 performing a call. A specific control channel (CCH2) determined from the number is searched, and a call signal for direct communication between the slave units is indicated by 23 in a slot shifted from the received control channel (CCH2) by a predetermined timing t. To the device 2. At this time, one of the calling frequencies is selected from the frequencies stored in the frequency storage unit 15. The call signal is transmitted until a call response signal from the slave unit 2 indicated by 23 is received or until the time limit is exceeded. If a call response is received within the time limit, the call is shifted to a call. If the time limit is exceeded, the called side is determined to be busy. Next, the handset 2 shown in 23 is unique to the wireless telephone device based on the control channel generated by the timing generation unit 14 and transmitted from the base unit shown in 21 for each slot at a predetermined interval. When a call signal for direct telephone communication between child units 1 is received from the child unit 1 at a slot shifted by a predetermined timing t from a specific control channel in a standby state determined by the number The mobile station stops receiving the standby control channel determined from the number unique to the wireless telephone device transmitted at every slot at a predetermined interval, transmits an incoming call response signal to the slave unit 1 indicated by 22, The operation shifts to a direct telephone call with the child device 1.

In the first embodiment, when the calling handset determines the calling timing of the direct call between handset, the control channel of the base unit which the calling handset receives is once received and the transmission timing is adjusted. Although determined, as another embodiment, based on the time difference between the control channel received by itself and the control channel received by the calling slave, the timing of the control channel received by the slave determines A method of determining a call timing of a direct call, a method of receiving a reference signal, and a determination of a call timing of a direct call between slaves based on a time difference between the reference signal and a control channel of a master unit to be received by the slave to be called. A method is also possible.

(Embodiment 2) FIG. 3 is an explanatory diagram showing a state in which a wireless telephone apparatus according to the present invention performs a direct telephone call between child apparatuses during self-employed standby, according to an embodiment of the present invention. FIG. 2 shows an example of timing of an embodiment constituted by the blocks shown in FIG.

In FIG. 3, reference numeral 31 denotes a master unit, 32 denotes a slave unit 1, and 33 denotes a transmission / reception state of the slave unit 2. The master unit shown in FIG. 31 transmits a reference signal serving as a timing reference and a plurality of control channels (shown as CCH1 and CCH2 in FIG. 3) in a specific order for each slot at a predetermined interval.
Sending in configuration. The base unit notifies the extension unit or the like to the extension unit using the control channel, and the control channel used for this notification is CCH1, CCH2 according to the extension number of the extension unit, such as the extension number of the extension unit. Is selected. For example, a call is made on CCH1 when calling an extension with an odd number, and CCH2 is called when calling an extension with an even number.
Make a call with. Slave device 1 and slave device 2 shown in 32 and 33
When a standby state of the base unit is performed, a specific control channel determined from a number unique to the wireless telephone device is selected from among a plurality of control channels transmitted from the base unit indicated by 31 at every predetermined interval of slots. Receiving and waiting for a call. In FIG. 3, the child device 1 uses the CCH 1 used when the parent device calls the child device 1, and similarly, the child device 2
2 shows an example in which CCH2 used for calling is received. Further, the slave unit 1 and the slave unit 2 perform the standby of the direct call between the slave units, and
Based on the control channel transmitted from the master unit indicated by 31 at every predetermined interval from the master unit, a standby specific control channel determined from the number unique to the wireless telephone device is used. Signals for direct communication between slave units are received at a plurality of slots shifted by a predetermined timing t, and a call for direct communication between slave units is also on standby. At this time, the standby frequency is stored in the frequency storage unit 1.
5, a plurality of frequencies are received at the above timing in a predetermined order.

Here, when a calling operation is performed to call the slave units 1 to 33 indicated by 32 to the slave units 2 in the direct call mode between the slave units, the slave unit 1 indicated by 32 moves between the master unit and the slave unit. Stops waiting for a direct call, and determines from a plurality of control channels transmitted from the master unit indicated at 31 at every predetermined interval, a number unique to the wireless telephone device corresponding to the calling slave unit 2. A specific control channel (CC
H2), and receives the received control channel (CCH).
In a plurality of slots which are shifted by a predetermined timing t from 2), a call signal for direct telephone communication between slave units
3 is transmitted to the slave unit 2. At this time, the calling frequency transmits a plurality of frequencies stored in the frequency storage unit 15 in a predetermined order. The call signal is transmitted until the call response signal from the slave unit 2 shown in 33 is received or until the time limit expires. If a call response is received within the time limit, the call is shifted to a call. If the time limit is exceeded, the called side is determined to be busy. The channels used at this time are set in multiple channels for each system.
Here, the channels are f1 to f3, and the order is f1, f2, and f3. Also, at the time of transmission, if there is a slot in use by performing carrier sense, the transmission in that slot is stopped.

Next, the slave unit 2 indicated by 33 transmits a radio signal based on the control channel created by the timing generation unit 14 and transmitted from the master unit indicated by 31 at every predetermined slot. In a plurality of slots which are shifted from a specific control channel by a predetermined timing t during a standby determined by a telephone device-specific number, a plurality of frequencies stored in the frequency storage unit 15 are determined in a predetermined order. , 32, the call signal of the direct telephone call between the child devices transmitted from the child device 1 is received from the parent device shown in 31, and is determined from the unique number of the wireless telephone device transmitted for each slot at a predetermined interval. Of the received control channel is stopped, and one of the received slots is
One of the slots is selected, and an incoming call response signal is transmitted to the slave unit 1 indicated by 32 in a transmission slot corresponding to the selected slot.
The operation shifts to a direct telephone call with the child device 1. FIG. 3 shows an example in which the f3 channel is selected.

In the second embodiment, when the calling handset determines the call timing of the direct call between the handset, it temporarily receives the control channel of the base unit which the calling handset receives and adjusts the transmission timing. Although determined, as another embodiment, based on the time difference between the control channel received by itself and the control channel received by the calling slave, the timing of the control channel received by the slave determines A method of determining a call timing of a direct call, a method of receiving a reference signal, and a determination of a call timing of a direct call between slaves based on a time difference between the reference signal and a control channel of a master unit to be received by the slave to be called. A method is also possible.

[0030]

As is apparent from the above description, according to the present invention, the control channels transmitted at predetermined intervals from the same master unit waiting for the slave units in the direct talk between the slave units. Based on the reception timing, the transmission timing of the direct telephone call between the slave units is determined, and on the standby side, the mutual slave units are similarly transmitted at predetermined intervals from the same master unit to wait for. By determining the reception timing of the direct call between the slave units based on the reception timing of the control channel, the transmission period of the direct call between the slave units and the reception period of the waiting signal can be shortened And the advantage of reducing current consumption for both the calling side and the standby side, and shortening the time from the start of the call to the response to the call signal. Cormorant advantageous effect can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless telephone device according to a first embodiment of the present invention;

FIG. 2 is an explanatory diagram of transmission and reception of a master unit and a slave unit of the first embodiment in the wireless telephone device.

FIG. 3 is an explanatory diagram of transmission and reception between a master unit and a slave unit of the second embodiment in the wireless telephone device.

[Explanation of symbols]

 Reference Signs List 11 antenna 12 radio section 13 communication control section 14 timing generation section 15 frequency storage section 16 voice control section 17 speaker 18 microphone 19 key input section 20 man-machine interface section 24 display section

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K027 AA12 BB17 JJ07 5K067 AA15 AA43 BB08 CC04 CC06 CC21 DD25 EE02 EE10 EE25 FF02 HH23 KK01 KK15

Claims (4)

[Claims] 1. A predetermined time period (hereinafter, referred to as a frame) is equally divided, and a transmission signal and a reception signal are multiplexed and communicated at each of the equally divided time periods (hereinafter, referred to as slots). A master unit having a function of transmitting a reference signal serving as a timing reference and a plurality of control channels in a specific order and configuration for each slot at a predetermined interval in a wireless system performing communication using a time division multiplexing method. A wireless telephone device that waits for a call signal on a specific control channel determined by a unique number of the wireless telephone device among a plurality of control channels registered in the wireless communication device, and is capable of direct communication between wireless telephone devices. A telephone device, comprising: an antenna that transmits and receives a radio signal; a receiving unit that demodulates a received signal input from the antenna and outputs demodulated data; A wireless unit having a transmitting unit for outputting data to the antenna, and a timing signal generated at a predetermined timing from the timing of a specific control channel that the wireless telephone device calls when calling the direct communication of the wireless telephone device. A timing generation unit to perform the output, a frequency storage unit that stores a transmission and reception frequency when performing direct communication with another wireless telephone device registered in the base unit,
When calling a direct communication of another wireless telephone device registered in the base unit, the timing of the transmission / reception slot of the direct communication is determined based on the timing signal output from the timing generation unit, and the frequency storage unit And a communication control unit that controls the radio unit so as to select a frequency stored in the radio communication unit and call a call directly in the determined transmission / reception slot. 2. The method according to claim 1, wherein when calling direct communication, control is performed such that transmission and reception are performed in a plurality of slots at a plurality of frequencies stored in the frequency storage unit in a predetermined order and at intervals. The wireless telephone device according to claim 1. 3. A wireless system for performing communication using a time-division multiplexing method in which a predetermined frame is equally divided and a transmission signal and a reception signal are multiplexed in each of the equally divided slots and communication is performed. A wireless telephone among a plurality of control channels registered in a master unit having a function of transmitting a reference signal serving as a timing reference and a plurality of control channels in a specific order and configuration for each slot at a predetermined interval. A wireless telephone device that waits for a call signal on a specific control channel determined by a device-specific number, a wireless telephone device capable of direct communication between the wireless telephone devices, and an antenna for transmitting and receiving a wireless signal, A receiving unit that demodulates a received signal input from an antenna and outputs demodulated data, and a transmitting unit that modulates transmission data and outputs modulated data to the antenna. A radio unit, a timing generation unit for generating a timing signal output at a predetermined timing from the timing of the specific control channels themselves during direct communication waiting awaits a wireless telephone device,
When performing a direct communication with another wireless telephone device registered in the base unit, a frequency storage unit storing transmission and reception frequencies, and when waiting for direct communication of another wireless telephone device registered in the base unit, Determine the timing of the receiving slot for direct communication based on the timing signal output from the timing generating unit, select the frequency stored in the frequency storage unit, and wait for a direct call in the determined receiving slot. And a communication control unit for controlling the radio unit to perform the operation. 4. When a call for direct communication is awaited, control is performed such that transmission and reception are performed in a plurality of slots at a plurality of frequencies stored in the frequency storage unit in a predetermined order and at intervals. The wireless telephone device according to claim 3.