JPH09289680A - Communication equipment, radio communication equipment and communication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a terminal equipment in use in the private mode to respond also to an incoming call signal in the public mode in a communication system for a PHS or the like provided with a private base station and the terminal. SOLUTION: A private base station receives an incoming call signal from a public base station in the public mode to transfer the call signal to a terminal equipment so as to allow the terminal equipment to receive the incoming call signal from the public base station even in the private mode. Furthermore, when the terminal equipment is in operation in the private mode, the private base station receives a speech signal from the public base station to send the signal to the terminal equipment and receives the speech signal from the terminal equipment to send the signal to the public base station. When the terminal equipment reaches a prescribed state, a channel is switched to make communication with the public base station not via the private base station. Thus, the terminal equipment makes a speech in both the private mode and the public mode.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a personal handyphone system (PHS).
stem), etc., to a communication device, a wireless communication device, and a communication method used in a digital cordless telephone system.

[0002]

2. Description of the Related Art A device used in a digital cordless telephone system such as a PHS has a communication device having a function as a self-employed base station for other communication devices and a function of communicating with the above-mentioned self-employed base station. There are terminals that are wireless communication devices.

[0003] In such a system, the terminal can normally use either the public mode or the self-employed mode. Here, the public mode is a mode in which information communication is performed via a public base station, which is a wireless station installed for public use, and is usually used when the terminal is independently used at a place where the user is out. Used. On the other hand, the self-employed mode is a mode in which a communication device installed in a home or the like is used as a self-employed base station to perform information communication through the self-employed base station. Used when using.

[0004]

Conventionally, a terminal in a system as described above cannot use both public mode and private mode at the same time, and whether it is used in public mode or private mode. Had to choose. That is, in the conventional communication device, it is necessary to set the terminal to be used in the public mode or to be used in the self-employed mode according to the use situation.

Therefore, the terminal in the conventional system has a problem that it cannot receive an incoming signal in a different mode. That is, in the conventional system, for example, when the terminal is set to be used in the self-employed mode, the terminal cannot respond to the incoming signal in the public mode.

The present invention has been proposed in view of such a conventional situation, and even when the terminal is set to be used in the self-employed mode, the terminal changes to the public mode signal. The purpose is to be able to respond.

[0007]

A communication device according to the present invention completed to achieve the above object transmits and receives a signal to and from a first party in a first mode and a second mode in a second mode. The wireless communication means for transmitting and receiving signals to and from the other party, the wired communication means for performing wired communication, and the communication control means for controlling the operations of the wireless communication means and the wired communication means. Here, in the first mode, the base station of the public wireless telephone network operates as the terminal with the first partner, and in the second mode, the terminal of the private wireless telephone network operates as the second terminal. Operates as a partner base station.
At this time, in the first mode and the second mode,
Signals are transmitted and received by the time division multiple access method, and the signals transmitted and received in the second mode are slot-synchronized with the timing of the signals transmitted and received in the first mode.

When the communication device receives a signal from the first party in the first mode, it transmits the incoming signal to the second party in the second mode, and then, It is preferable to have a function of shifting to a third mode in which communication between the first partner and the second partner is not performed when the second partner is in a predetermined state. Further, the communication device further includes a voice transmitting unit, a voice receiving unit, and an operating unit, and is singly via the public wireless telephone network and / or the private wireless telephone network and / or the wired communication network. It is preferable to have a function capable of making a call with another device.

The wireless communication apparatus according to the present invention is the first
Wireless communication means for transmitting and receiving signals to and from the first partner in the second mode, and transmitting and receiving signals to and from the second partner in the second mode, voice transmitting means, voice receiving means, operating means, and each of the above means. Communication control means for controlling the operation of the second mode, the radio wave state of the first mode is monitored by a predetermined signal from the second party during communication in the second mode, and the monitored first mode is monitored. When the radio wave condition of the first mode satisfies a predetermined condition, the communication of the second mode is ended and the communication is started in the first mode.

In the first mode and the second mode, the radio communication device transmits and receives signals by a time division multiple access system, and in the first mode, the base station of the public radio telephone network operates as the base station. It is preferable that the mobile terminal operates as a terminal that serves as the first partner, and that, in the second mode, the base station of the private wireless telephone network operates as the terminal that serves as the second partner.

Further, the communication method according to the present invention receives a signal from the first partner in the first mode and synchronizes with the received signal from the first partner in the second mode. A signal is transmitted to the other party to secure a communication line between the first party and the second party, and mediates communication between the first party and the second party. It is characterized by doing. In the above communication method, it is preferable that both the first and second modes transmit and receive signals by a time division multiple access method.

Furthermore, another communication method according to the present invention receives a signal from a second partner in a second mode,
When a predetermined signal is received from the other party,
The line state of the first mode different from the above mode is monitored, and when the monitored line state of the first mode satisfies a predetermined condition, the communication of the second mode is ended and the line state of the second mode is terminated. It is characterized by starting communication in the first mode. Also in the other communication method, it is preferable that both the first and second modes transmit and receive signals by a time division multiple access method.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, as a specific embodiment to which the present invention is applied, a communication device having a function as a self-employed base station for other communication devices and a function for communicating via this communication device will be described. An example in which the present invention is applied to a personal handyphone system (PHS) including a wireless communication device provided will be described.

The present invention is not limited to the following examples, and it goes without saying that the configuration and the like can be arbitrarily changed without departing from the gist of the present invention. In particular, the present invention is not limited to PHS, and can be widely applied to a communication device having a function as a self-employed base station for other communication devices, a communication system having a master unit and a slave unit, and the like. Needless to say.

First, the communication device according to the present embodiment will be described.

The communication device according to the present embodiment is a self-employed base station having a function as a telephone capable of communicating via a wired telephone line network and a function as a master unit for a terminal. It is configured. And
As shown in FIG. 1, this communication device includes a communication control unit 1 that controls communication, a modem 2 connected to the communication control unit 1, a wireless unit 3 connected to the modem 2, and a wireless unit 3. The connected antenna 4, the first buffer 5 connected to the communication control unit 1, the second buffer 6 connected to the communication control unit 1, and the audio codec unit 7 connected to the communication control unit 1. , The audio codec section 7 via the speaker amplifier 8
Connected to the speaker 9, a microphone 11 connected to the audio codec unit 7 via a microphone amplifier 10, a man-machine interface control unit 12 connected to the communication control unit 1, and a man-machine interface control unit 12. The operation unit 14 is connected to the man-machine interface control unit 12, and the wired telephone network connection unit 15 is connected to the communication control unit 1.

The communication control unit 1, the modem 2, the radio unit 3, the antenna 4, the first buffer 5 and the second buffer 6 are
It is mainly used when communicating with public base stations and terminals.

Specifically, the communication control unit 1 controls the communication of this communication device. For example, the communication control unit 1 receives a control signal transmitted from a public base station and is time-divided into the control signal. The slots are synchronized (hereinafter referred to as TDMA slot synchronization). The communication control unit 1 also has a function of receiving an incoming signal from a public base station and transmitting the incoming signal to the terminal, or receiving a call signal from the public base station and transmitting the call signal to the terminal. It also has a function of transmitting a call signal from a terminal and transmitting the call signal to a public base station.

A modem 2 connected to the communication control unit 1
Is for performing processing such as compression / expansion and modulation / demodulation on a call signal and a control signal, and the wireless unit 3 connected to the modem 2
Is for amplifying a transmission / reception signal and oscillating a carrier frequency, and the antenna 4 connected to the radio unit 3 is for transmitting / receiving a signal to / from a public base station or a terminal.
In addition, the first buffer 5 connected to the communication control unit 1
The second buffer 6 is used when a call signal is transmitted and received between the terminal and the public base station via this communication device, and the first buffer 5 is the public base station. The second buffer 6 is for temporarily storing a call signal from the terminal.

The voice codec section 7, speaker amplifier 8, speaker 9, microphone amplifier 10 and microphone 11 are also provided.
Is mainly used when making a call by this communication device.

Specifically, the speaker amplifier 8 subjects the signal from the audio codec unit 7 to processing such as amplification,
The processed signal is sent to the speaker 9. Then, the speaker 9 outputs the signal, which has been subjected to processing such as amplification by the speaker amplifier 8, as sound. Meanwhile, the microphone 11
Converts the input voice or the like into an analog signal and sends the signal to the microphone amplifier 10. Microphone amplifier 10
Performs a process such as amplification on the signal input from the microphone 11, and sends the processed signal to the audio codec unit 7. The voice codec unit 7 performs processing such as decoding and analogization on the signal sent from the communication control unit 1,
The processed signal is sent to the speaker amplifier 8. Further, the audio codec section 7 subjects the signal sent from the microphone amplifier 10 to processing such as digitization and coding,
The processed signal is sent to the communication control unit 1.

The man-machine interface control unit 12, the ringer unit 13 and the operation unit 14 are parts related to the man-machine interface of this communication device.

Specifically, the man-machine interface control unit 12 controls the man-machine interface of the communication device, and controls the operation of the ringer unit 13 and the operation unit 14. The ringer unit 13 is controlled by the man-machine interface control unit 12, and, for example, sounds an incoming call notification sound when the communication device receives an incoming call signal. The operation unit 14 is an interface unit for the user, and includes a display device using liquid crystal or the like, a dial key, and the like. In addition to the dial keys, the operation unit 14 also includes dedicated switches and keys used for starting and ending a call, and switching operation modes for additional functions. The operation unit 14 is used, for example, when the user inputs the telephone number of the other party to make a call from the communication device.

The wired telephone network connection unit 15 is for connecting this communication device to a wired telephone network.
It is used when receiving an incoming signal, transmitting an outgoing signal, or transmitting and receiving a call signal through a wired telephone network.

Next, the main functions and operations of the communication device will be described. In the following, the communication device has a function of performing communication in two communication modes, a first mode with a public base station as a partner and a second mode with a terminal as a partner Described as a station.

The self-employed base station has a function of receiving a control signal from the public base station. When the self-employed base station receives the control signal from the public base station, first, the control signal from the public base station is received by the antenna 4 in the first mode. Next, the control signal received by the antenna 4 is subjected to processing such as amplification by the wireless unit 3 and processing such as demodulation by the modem 2 to be converted into a baseband signal. Then, the communication control unit 1 performs TDMA slot synchronization with this baseband signal. As a result, the TDMA slot is synchronized with the control signal, and the private base station receives the control signal from the public base station.

The self-employed base station has a function of receiving a call signal from the public base station and transmitting the call signal to the terminal, and a function of receiving the call signal from the terminal and transmitting the call signal. It has a function of transmitting to a public base station. That is, it is possible to make a call between the public base station and the terminal via this self-employed base station.

When the self-employed base station receives the call signal from the public base station and transmits the call signal to the terminal, first, the antenna 4 receives the call signal from the public base station. . Then, the call signal received by the antenna 4 is subjected to processing such as amplification by the wireless unit 3 and further subjected to processing such as demodulation by the modem 2 to be converted into a baseband signal. Then, from the baseband signal, the communication control unit 1 extracts voice data or the like to be transmitted from the public base station to the terminal, and temporarily stores the voice data or the like in the first buffer 5. After that, the communication control unit 1 takes out the voice data and the like from the first buffer 5 in accordance with the transmission slot timing to the terminal, and the modem 2 performs processing such as modulation on the voice data and the wireless data. The communication signal is processed by the unit 3 such as amplification, and then the communication signal is transmitted from the antenna 4 to the terminal in the second mode. Here, the voice data, etc.
As will be described later, it is transmitted on the information channel.

On the other hand, when the self-employed base station receives the call signal from the terminal and transmits the call signal to the public base station, first, in the second mode, the call signal from the terminal is received by the antenna. Received by 4. Then, the call signal received by the antenna 4 is subjected to processing such as amplification by the wireless unit 3 and further subjected to processing such as demodulation by the modem 2 to be converted into a baseband signal. Then, from the baseband signal, the communication control unit 1 extracts voice data or the like to be transmitted from the terminal to the public base station, and temporarily stores the voice data or the like in the second buffer 6. Thereafter, the communication control unit 1 takes out voice data and the like from the second buffer 6 in accordance with the transmission slot timing to the public base station, and the modem 2 performs processing such as modulation on the voice data and the like. After processing such as amplification by the wireless unit 3 into a call signal, the antenna 4
To the public base station in the first mode. Here, the voice data and the like are transmitted on the information channel as described later.

The configuration and operation of the communication apparatus according to this embodiment, which has a function as a self-employed base station (master device) for a terminal, has been described above with reference to FIG.
However, a communication device having a function as a self-employed base station does not necessarily need all of the configuration shown in FIG.
It is also possible to adopt a configuration in which a part thereof is omitted, as shown in FIG.

FIG. 2 shows an example of the configuration of the communication device shown in FIG. 1 excluding the part for inputting / outputting voice and the part relating to the man-machine interface. Specifically, from the configuration of FIG. 1, a voice codec section 7, a speaker amplifier 8, a speaker 9, a microphone amplifier 1
0, the microphone 11, the man-machine interface control unit 12, the ringer unit 13, and the operation unit 14 are excluded. In addition, in FIG. 2, the same parts as those in FIG. 1 are designated by the same reference numerals.

In the communication device having the configuration shown in FIG. 2, the above-mentioned control involving the man-machine interface control section, the receiving operation which requires ringing of the ringer and driving of the speaker,
No transmission operation involving the audio codec section and the microphone is performed. These operations are all performed by the terminal wirelessly connected to the communication device having the function as the self-employed base station in the second mode. The operation of each unit of the communication device shown in FIG. 2 is the same as the operation of each unit to which the common reference numeral is attached in the communication device of FIG.

Next, the radio communication apparatus according to this embodiment will be described.

The wireless communication device according to the present embodiment has a function of performing communication in a public mode and a function of a slave device that performs communication in a self-employed mode with the communication device serving as a self-employed base station (master device). Configured as a terminal. As shown in FIG. 3, the wireless communication device includes a communication control unit 21 that controls communication, a modem 22 connected to the communication control unit 21, and a wireless unit 23 connected to the modem 22.
An antenna 24 connected to the wireless unit 23, a first buffer 25 connected to the communication control unit 21, a second buffer 26 connected to the communication control unit 21, and a communication control unit 2
1, a speaker 29 connected to the audio codec unit 27 via a speaker amplifier 28, a microphone 31 connected to the audio codec unit 27 via a microphone amplifier 30, and a communication control unit. It includes a man-machine interface control unit 32 connected to 21, a ringer unit 33 connected to the man-machine interface control unit 32, and an operation unit 34 connected to the man-machine interface control unit 32.

Communication control unit 21, modem 22, radio unit 2
3, the antenna 24, the first buffer 25, and the second buffer 26 are mainly used when communicating with a public base station or a self-employed base station.

More specifically, the communication control unit 21 controls the communication of this wireless communication device. For example, the communication control unit 21 receives a control signal from a public base station or a self-employed base station and outputs the control signal. TDMA slot synchronization is performed. The communication control unit 21 has a function of receiving an incoming signal from a public base station or a self-employed base station, a function of receiving a call signal from the public base station or a self-employed base station, a public base station or a self-employed base station. It also has a function to send call signals to.

Modem 2 connected to the communication control unit 21
Reference numeral 2 is for performing processing such as compression / expansion and modulation / demodulation on a call signal and control signal, and the radio unit 23 connected to the modem 22 is for amplifying a transmission / reception signal and oscillating a carrier frequency. , An antenna 24 connected to the wireless unit 23
Is for transmitting and receiving signals to and from public base stations and self-employed base stations. The first buffer 25 and the second buffer 26 connected to the communication control unit 21 are used when transmitting / receiving a call signal to / from a public base station or a self-employed base station, The first buffer 25 is
When receiving a call signal from a public base station or a self-employed base station, it is for temporarily storing the call signal, and the second buffer 26 is used when the call signal is transmitted from this terminal. , For temporarily storing the call signal.

The voice codec section 27, the speaker amplifier 28, the speaker 29, the microphone amplifier 30, and the microphone 31 are mainly used when making a call with this terminal.

Specifically, the speaker amplifier 28 subjects the signal from the audio codec unit 27 to processing such as amplification, and sends the processed signal to the speaker 29. Then, the speaker 29 outputs the signal, which has been amplified and processed by the speaker amplifier 28, as a sound. on the other hand,
The microphone 31 converts the input voice or the like into an analog signal and sends the signal to the microphone amplifier 30. The microphone amplifier 30 subjects the signal input from the microphone 31 to processing such as amplification, and sends the processed signal to the audio codec unit 27. The audio codec section 27 performs processing such as decoding and analogization on the signal sent from the communication control section 21, and outputs the processed signal to the speaker amplifier 2
8 Further, the audio codec section 27 subjects the signal sent from the microphone amplifier 30 to processing such as digitization and coding, and the processed signal is sent to the communication control section 21.
To send to.

The man-machine interface control unit 32, the ringer unit 33, and the operation unit 34 are parts related to the man-machine interface of this terminal.

Specifically, the man-machine interface control unit 32 controls the man-machine interface of this terminal, and controls the operation of the ringer unit 33 and the operation unit 34. The ringer unit 33 is controlled by the man-machine interface control unit 32 and, for example, sounds an incoming call notification sound when the terminal receives an incoming call signal. The operation unit 34 serves as an interface unit for the user, and includes a display device using liquid crystal or the like, a dial key, and the like. In addition to the dial keys, the operation unit 34 also includes dedicated switches and keys used for starting and ending a call, and switching operation modes for additional functions. The operation unit 34 is used, for example, when the user inputs the telephone number of the other party to make a call from the terminal.

Next, main functions and operations of the wireless communication device will be described. In the following, the wireless communication device has a second mode in which the above-mentioned self-employed base station is a partner and a third mode in which the public base station is a partner.
The terminal will be described as having a function of performing communication in one communication mode.

The terminal has a function of receiving a control signal from the public base station via the self-employed base station when in the self-employed mode which is the second mode. When the terminal receives the control signal from the public base station via the self-employed base station in the self-employed mode, first, the control signal transmitted from the public base station via the self-employed base station is transmitted by the antenna 24 of the terminal. To receive. Next, the wireless unit 23 performs processing such as amplification on the control signal received by the antenna 24, and further performs processing such as demodulation by the modem 22 and converts it into a baseband signal. Then, the communication control unit 21 performs TD for the baseband signal.
MA slot synchronization is performed. As a result, the TDMA slot for the control signal is synchronized, and the terminal receives the control signal transmitted from the private base station.

When the terminal is in the public mode which is the third mode, it receives the control signal directly from the public base station as in the conventional PHS.

The terminal also has a function of receiving a call signal from a public base station via the private base station when in the self-employed mode, and a function of receiving the call signal from the public base station via the private base station. And the function of sending to. That is,
Even when the terminal is in the self-employed mode, it can send and receive a call signal to and from the public base station through the self-employed base station.

When the terminal receives a call signal from the public base station via the self-employed base station, first,
The call signal transmitted from the self-employed base station is received by the antenna 24 of the terminal. Then, the call signal received by the antenna 24 is subjected to processing such as amplification by the radio section 23 and demodulation etc. by the modem 22 to be converted into a baseband signal. Then, the communication controller 21 extracts audio data and the like from this baseband signal, and outputs the audio data and the like to the first buffer 2
Save to 5 temporarily. After that, the communication control unit 21 sequentially takes out the audio data and the like from the first buffer 25, and the audio codec unit 27 performs processing such as decoding and analogization on the audio data and the like, and further amplifies them by the speaker amplifier 28. Then, the speaker 29 outputs the data.

On the other hand, when the terminal transmits a call signal to the public base station via the self-employed base station, first, the voice or the like input from the microphone 31 is converted into analog voice data or the like by the microphone 31. Then, the voice data and the like are subjected to processing such as amplification by the microphone amplifier 30 and further subjected to processing such as digitization and coding by the audio codec unit 27. Next, the communication control unit 21 temporarily stores the voice data and the like in the second buffer 26, and then the communication control unit 21 adjusts the voice data and the like to the transmission slot timing to the private base station. It is taken out from the second buffer 26. Then, for the voice data and the like taken out from the second buffer 26, the modem 2
The wireless unit 23 performs a process such as modulation and a process such as amplification by the wireless unit 23 into a call signal, which is then transmitted from the antenna 24 to the self-employed base station. At this time, the voice data and the like are transmitted on the information channel as will be described later.

When in the public mode, this terminal directly transmits / receives a call signal to / from a public base station as in the conventional PHS.

Next, signal transmission / reception by the public base station corresponding to the above-mentioned self-employed base station and terminal will be described. The PHS public base station is a 4-channel time division multiple access system (TDMA).
Although the transmission and reception are performed by ccess), for the sake of convenience, in the following description, one of the time-divided time slots will be described as an example.

Logical control channel (LC
FIG. 4 shows an example of transmission / reception timing of CH (logical control channel), and FIG. 5 shows an enlarged view of portion A of FIG. 4 and 5, TX indicates transmission from the public base station and RX indicates reception by the public base station. That is, the public base station intermittently transmits the downlink control signal once every 1250 ms by the control carrier having a predetermined frequency, thereby notifying the self-employed base station and the terminal of various control signals. Also, the public base station receives the downlink control signal 2.5 ms after the transmission of the downlink control signal due to the uplink control signal from the self-employed base station or the terminal. Here, the transmission time for one slot of the downlink control signal,
The transmission time for one slot of the uplink control signal is 625 μs including the guard time.

Further, the public base station intermittently transmits a call signal at a predetermined time by a communication carrier having a predetermined frequency during communication of a call signal including user information such as voice data. In addition, the public base station receives the downlink call signal 2.5 ms after the transmission of the downlink call signal due to the uplink call signal from the self-employed base station or the terminal. Where 1 of the downlink call signal
The transmission time for one slot and the reception time for one slot of the upstream call signal are 625 μs including the guard time.
It is.

FIG. 6 shows an example of the control slot for transmitting / receiving the control signal as described above and an example of the communication slot used for transmitting / receiving the call signal.

FIG. 6A shows an individual cell channel (SC
The structure of a control slot including a CH (signaling control channel) is shown. That is, the control slot including the channel for the individual cell includes the 4-bit transient response ramp time R, the 2-bit start symbol SS, and the 62
Preamble PR of bits, unique word UW of 32 bits, channel identification CI of 4 bits, outgoing identification code H1 of 42 bits, destination identification code H2 of 28 bits
, 34-bit control data I, 16-bit error detection parity CRC, and 16-bit guard bit GB
, And has a length of 625 μs. Here, the dedicated cell channel is a bidirectional channel that transfers information necessary for call connection between the public base station and the communication device, and the control data I of the control slot shown in FIG. The part of is a channel for individual cells.

FIG. 6B shows a broadcast channel (BCCH:
The configuration of a control slot including a broadcast control channel) or a paging channel (PCH) is shown. That is, the control slot including the broadcast channel or the paging channel has a 4-bit transient response ramp time R and a 2-bit start symbol SS.
, A 62-bit preamble PR, a 32-bit unique word UW, and a 4-bit channel identification CI
, 42-bit transmission identification code H1, 62-bit control data I, and 16-bit error detection parity CRC
And a guard bit GB of 16 bits, for a total of 240 bits, and have a length of 625 μs. here,
The broadcast channel is a downlink unidirectional channel for broadcasting control information from a public base station to a communication device, and a paging channel is a downlink channel for simultaneously transmitting the same information from a public base station to a plurality of communication devices. It is a one-way channel. Then, the portion of the control data I in the control slot shown in FIG. 6B becomes the broadcast channel or the paging channel.

FIG. 6C shows an information channel (TCH: tr).
The configuration of a communication slot including an affic channel) is shown. That is, the communication slot including the information channel has a 4-bit transient response ramp time R, a 2-bit start symbol SS, and a 6-bit preamble PR.
, 16-bit unique word UW, 4-bit channel identification CI, and 16-bit low speed associated channel S
A, 160-bit user information TCH, 16-bit error detection parity CRC, and 16-bit guard bit GB, which are 240 bits in total, have a length of 625 μs. Here, the information channel is a bidirectional channel for transferring user information such as voice data between the public base station and the communication device, and is a portion of the user information TCH of the communication slot shown in FIG. 6C. Is the information channel.

Then, for example, when the public base station is notified of an incoming call to the terminal whose position is registered in the general calling area from the network to which the public base station is connected, the public base station sets the general calling channel for the control slot. It is used to notify the incoming signal.
Here, when the terminal is in public mode,
When an incoming signal is directly received from the public base station, while in the self-employed mode, the incoming signal from the public base station is received via the self-employed base station as described above. That is, in the present embodiment, as described above, the self-employed base station also receives the control carrier transmitted by the public base station and synchronizes the TDMA slot with the control slot from the public base station. The base station also receives the incoming signal from the public base station. When the terminal is in the self-employed mode, the incoming signal from the public base station is transmitted to the terminal through the self-employed base station.

The signal flow when the terminal receives a signal from the public base station via the self-employed base station will be described below.

Here, the transmission / reception of the control signal between the public base station and the self-employed base station is performed by a control carrier (hereinafter referred to as public control carrier) fcp having a predetermined frequency, and the self-employed base station. A control signal (hereinafter, referred to as a private control carrier) fc having a predetermined frequency different from that of the public control carrier fcp is used to transmit and receive a control signal between the control terminal and the terminal. Further, transmission and reception of a call signal between the public base station and the self-employed base station are performed by a communication carrier (hereinafter, referred to as public communication carrier) ft1 having a predetermined frequency, and the self-employed base station and the terminal device. A call signal is transmitted and received between the public communication carrier ft1.
The communication carrier (hereinafter, referred to as a private communication carrier) ft2 having a predetermined frequency different from the above.

When the terminal receives an incoming signal from the public base station via the self-employed base station, the control slot is transmitted and received as shown in FIG. Here, FIG. 7 shows transmission / reception of control slots between the public base station and the self-employed base station, and transmission / reception of control slots between the self-employed base station and the terminal.

As shown by A1, A3 and A5 in FIG. 7, the public base station sets the public control carrier fc once every 50 ms.
The downlink control slot is transmitted by p. Also,
The public base station receives the downlink control slot 2.5 ms after transmitting the downlink control slot, as indicated by A2, A4, and A6 in FIG. 7, for the uplink control slot from the self-employed base station or the terminal. ing. And the public base station is 1250m
Once in s, that is, in A1 and A5 of FIG. 7, the incoming signal is notified by placing it in the control slot.

On the other hand, the self-employed base station adjusts the reception frequency to the public control carrier fcp, receives the public control carrier fcp transmitted by the public base station, and sets the TDMA slot as the control slot from the public base station. Synchronize. That is, the self-employed base stations are B1, B5, B7 in FIG.
As shown in, the control slot is received every 50 ms transmitted from the public base station, and the TD is sent to the control slot.
The MA slots are synchronized. In addition, the self-employed base station,
In order to notify the terminal of the incoming signal, as shown at B3 in FIG. 7, 7.5 ms after the control slot transmitted by the public control carrier fcp from the public base station is received, the private control carrier is received. The control slot is transmitted to the terminal at fc. At this time, the cycle of the superframe of the logical control channel transmitted by the self-employed base station is the same as the cycle of the superframe of the logical control channel transmitted by the public base station. Therefore, the self-employed base station receives the downlink control slot 2.5 ms after transmitting the downlink control slot, as indicated by B4 in FIG. 7, for the uplink control slot from the terminal.

Further, the terminal matches the reception frequency with the carrier fc for private control, receives the carrier fc for private control transmitted by the private base station, and synchronizes the TDMA slot with the control slot from the private base station. I am letting you. That is, the terminal receives the control slot from the self-employed base station and synchronizes the TDMA slot with the control slot, as indicated by C1 in FIG.

As described above, when the public base station, the self-employed base station and the terminal are operating, the location registration is performed from the circuit network to which the public base station is connected to the paging area belonging to the public base station. When the public base station receives an incoming signal to the terminal which has been activated, as shown by the arrow from A1 to B1 in FIG. 7, the public base station determines the public control carrier fcp.
In this way, the incoming signal is put on the paging channel to notify.

Here, the self-employed base station synchronizes the TDMA slot with the control slot from the public base station,
Receives an incoming signal from a public base station on the paging channel. After 7.5 ms from the reception of the incoming signal from the public base station, the self-employed base station, as shown by the arrow from B3 to C1 in FIG.
The incoming signal is put on the paging channel to notify.

Here, the terminal synchronizes the TDMA slot with the control slot from the self-employed base station and receives an incoming signal from the self-employed base station on the paging channel. Then, after 2.5 ms from the reception of the incoming signal from the self-employed base station, the terminal uses the self-employment control carrier fc as shown by the arrow from C2 to B4 in FIG.
The information necessary for call connection is sent to the self-employed base station on the dedicated cell channel, and a link channel establishment request is made.

The self-employed base station which has received the link channel establishment request from the terminal is required for call connection to the public base station by the public control carrier fcp as shown by the arrow from B6 to A4 in FIG. Information is sent on a dedicated cell channel and a link channel establishment request is made.

Next, a connection sequence when the terminal receives the incoming signal from the public base station through the private base station as described above will be described with reference to FIG.

First, when the public base station receives an incoming signal from the line network to which the public base station is connected to a terminal whose location is registered in the paging area belonging to the public base station, a step is carried out. As shown in ST1, the public control carrier fcp puts an incoming signal on the paging channel to notify the private base station.

Next, the self-employed base station, which has received the incoming signal from the public base station, sounds an incoming call notification sound as shown in step ST2, and, as shown in step ST3, by the self-employed control carrier fc, The incoming signal is put on the paging channel to notify the terminal.

Next, the terminal having received the incoming signal from the self-employed base station causes the ringer section to ring an incoming call notification sound, as shown in step ST4.

Then, as shown in step ST5, when the call start key of the operation unit of the terminal is pressed, the terminal, as shown in step ST6, is operated by the carrier f for self-employed control.
In step c, a link channel establishment request is transmitted to the self-employed base station.

Next, the self-employed base station which has received the link channel establishment request from the terminal device transmits the link channel establishment request to the public base station by the public control carrier fcp, as shown in step ST7.

Next, the public base station which has received the link channel establishment request from the self-employed base station puts the information necessary for call connection on the dedicated cell channel by the public control carrier fcp, as shown in step ST8. And transmits it to the self-employed base station, and allocates the link channel. Here, the information necessary for call connection is, specifically, information such as the carrier number and slot position of the call slot used between the public base station and the self-employed base station.

Next, the self-employed base station, which has received the link channel assignment from the public base station, carries out carrier sense for the carrier number and slot position of the designated speech slot, as shown in step ST9. Then, when the self-employed base station determines that the slot is “empty”,
As shown in step ST10, the public communication carrier f
At t1, the synchronization burst is transmitted to the public base station.

Next, the public base station which has received the synchronization burst from the self-employed base station, as shown in step ST11,
The synchronization burst is transmitted to the self-employed base station by the public communication carrier ft1.

Next, the self-employed base station which has received the synchronization burst from the public base station, as shown in step ST12,
The TCH idle burst is transmitted to the public base station by the public communication carrier ft1.

Next, the public base station having received the TCH idle burst from the self-employed base station transmits the TCH idle burst to the self-employed base station by the public communication carrier ft1 as shown in step ST13.

Next, the self-employed base station, which has received the TCH idle burst from the public base station, puts the information necessary for call connection on the individual cell channel by the self-employed control carrier fc, as shown in step ST14. Send to terminal and assign link channel. Here, the information necessary for call connection is specifically information such as the carrier number and slot position of the call slot used between the self-employed base station and the terminal.

Next, the terminal, which has been assigned a link channel from the self-employed base station, carries out carrier sense for the carrier number and slot position of the designated communication slot, as shown in step ST15. Then, when it is determined that the slot is “vacant”, the terminal transmits a synchronization burst to the private base station by the private communication carrier ft2, as shown in step ST16.

Next, the self-employed base station, which has received the synchronization burst from the terminal, transmits the synchronization burst to the terminal by means of the self-communication carrier ft2, as shown in step ST17.

Next, the terminal having received the synchronization burst from the self-employed base station transmits the TCH idle burst to the self-employed base station by means of the self-communication carrier ft2, as shown in step ST18.

Next, the self-employed base station, which has received the TCH idle burst from the terminal, transmits the TCH idle burst to the terminal by means of the self-communication carrier ft2, as shown in step ST19.

After that, as shown in step ST20a, communication is performed between the public base station and the self-employed base station by the public communication carrier ft1.
As shown in 0b, communication is performed between the self-employed base station and the terminal by the self-employed communication carrier ft2.

As described above, in the communication device according to the present embodiment, when the incoming signal from the public base station to the terminal is notified by the public control carrier fcp, the private base station which receives the incoming signal causes The incoming signal is notified by the carrier fc for private management. Therefore, in the communication device according to the present embodiment, even when the terminal is in the self-employed mode, the terminal can receive an incoming signal from the public base station via the self-employed base station.

Next, transmission / reception of a call signal between the public base station and the terminal, which is performed via the self-employed base station, will be described with reference to FIG. Here, FIG. 9 shows transmission / reception of communication slots between the public base station and the self-employed base station, and transmission / reception of communication slots between the self-employed base station and the terminal.

When transmitting a call signal from the public base station to the terminal via the self-employed base station, first, as shown by the arrow from P1 to P2 in FIG. 9, the public base station uses the public communication carrier ft1. , Voice data, etc. are put on the information channel of the communication slot and transmitted to the self-employed base station. Then, the self-employed base station having received the communication slot from the public base station synchronizes the TDMA slot with the communication slot, and extracts voice data and the like from the information channel of the communication slot. After that, as shown by the arrows from P3 to P4 in FIG.
At t2, the voice data and the like are put on the information channel of the communication slot and transmitted to the terminal.

On the other hand, when a call signal is transmitted from the terminal device to the public base station via the self-employed base station, first, Q of FIG.
As indicated by the arrows from 1 to Q2, the terminal uses the carrier ft2 for private communication to put voice data and the like on the information channel of the communication slot and transmit the data to the private base station.
Then, the self-employed base station that has received the communication slot from the terminal synchronizes the TDMA slot with the communication slot and extracts voice data and the like from the information channel of the communication slot. After that, as shown by the arrows from Q3 to Q4 in FIG.
At t1, the voice data and the like are put on the information channel of the communication slot and transmitted to the public base station.

As described above, in the communication apparatus according to this embodiment, even when the terminal is in the self-employed mode, the call signal can be transmitted from the terminal to the public base station through the self-employed base station. Also, the call signal from the public base station can be received by the terminal.

In the above embodiment, when the terminal is in the second mode, the self-employed mode, the terminal transmits / receives a call signal to / from the public base station via the self-employed base station. , When the terminal receives an incoming signal from the public base station via the private base station while in the self-employed mode, the terminal detects the control signal from the public base station and the terminal detects this signal. When the control signal from the public base station is detected, the terminal may be switched to the public mode, which is the first mode, and direct communication may be performed between the terminal and the public base station.

FIG. 10 is a connection sequence showing the operation in this case. Since each step from step ST1 to step ST13 is the same as each step in the connection sequence of FIG. 8, description thereof will be omitted. In the following description, it is assumed that a transmission channel is secured between the public base station and the self-employed base station by using the public communication carrier ft1 by each step up to step ST13.

In ST14 ', the private base station sends a public mode switching request signal to the terminal using the public control carrier fc. With this, the self-employed base station itself
Since the terminal waits for a response, it enters the "wait mode" shown in step 13 '.

At step ST15 ', the public communication carrier ft1 is used to check whether the terminal receiving the public mode switching request signal can directly talk with the public base station.
Make a career sense in.

Next, step ST16 'and step ST
At 17 ', synchronization bursts are transmitted and received between the terminal and the public base station. In addition, step ST18 ', step ST
In 19 ', TCH idle burst is transmitted and received between the terminal and the public base station. These steps are the same as steps ST10 to ST13 in FIG. 8, whereby the line between the terminal and the public base station is connected using the public communication carrier ft1.

In step ST20 ', when the terminal receives the TCH idle burst in step ST19' and confirms the line connection, thereafter, the terminal itself performs the first operation.
The public mode, which is the mode of (1), is switched to, and the self-employed base station is notified of the direct communication with the public base station. This notification is
It is performed by the public mode switching ACK signal in fc. Upon receiving the public mode switching ACK signal, the self-employed base station recognizes that the role of mediating the connection between the terminal and the public base station has ended, and the self-employed base station selects from the first mode to the third mode.
The mode shifts to the fourth mode, which is different from the communication modes up to this mode. The fourth mode is a state in which the above operation is completed, a normal standby mode, or the like.

In step ST20c, the direct communication between the terminal and the public base station is started by the public communication carrier ft1 in the public mode which is the first mode.

By the way, the above-mentioned P as an application example of the present invention
In the HS, the number of terminals may be plural. Then, the terminal may transmit / receive signals to / from the public base station via the master unit (self-employed base station) or may directly transmit / receive signals to / from the public base station. it can.
Therefore, when the present invention is applied to a communication device having two or more terminals, one terminal directly transmits / receives a signal to / from a public base station and the other one It is also possible to make two simultaneous external line calls by transmitting and receiving signals to and from the public base station via the master unit.

[0097]

As is apparent from the above description, according to the present invention, the signal from the telephone network connected to the self-employed base station by the terminal and the public telephone can be used without using the transfer telephone service or the like. It becomes possible to receive both the signal from the base station.

That is, according to the present invention, the terminal can be used in the public mode and the self-employed mode at the same time. For example, even if the terminal is set to be used in the self-employed mode, the terminal can be used. Makes it possible to respond to public mode signals.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of a communication device to which the present invention has been applied.

FIG. 2 is a block diagram showing another configuration example of a communication device to which the present invention has been applied.

FIG. 3 is a block diagram showing a configuration example of a wireless communication device to which the present invention has been applied.

FIG. 4 is a diagram showing timing of transmission / reception of a logical control channel by a public base station.

5 is an enlarged view of a portion A of FIG.

FIG. 6 is a diagram showing an example of a slot configuration.

FIG. 7 is a diagram showing how control slots are transmitted and received.

FIG. 8 is a diagram showing a connection sequence when a terminal receives an incoming signal from a public base station via a self-employed base station.

FIG. 9 is a diagram showing how a communication slot is transmitted and received.

FIG. 10 is a diagram showing a connection sequence when direct communication is performed between a terminal and a public base station.

[Explanation of symbols]

1, 21 Communication control section, 2, 22 modem, 3, 2
3 radio section, 4,24 antenna, 5,25 1st
Buffer, 6,26 second buffer, 7,27
Audio codec section, 8,28 speaker amplifier,
9,29 speaker, 10,30 microphone amplifier,
11,31 Microphone, 12,32 Man-machine interface control section, 13,33 Ringer section, 14,
34 Operation part, 15 Wired telephone network connection part

Claims (15)

[Claims] 1. A wireless communication unit for transmitting and receiving a signal to and from a first partner in a first mode, and a signal to and from a second partner in a second mode; a wired communication unit for performing wired communication; A communication device, comprising: communication means and communication control means for controlling the operation of the wired communication means. 2. In the first mode, the base station of the public wireless telephone network operates as the terminal device that is the first party, and in the second mode, the terminal of the private wireless telephone network operates as the first terminal device. The communication device according to claim 1, wherein the communication device operates as a base station of the second party. 3. The communication device according to claim 1, wherein the signal transmitted and received in the second mode is synchronized with the timing of the signal transmitted and received in the first mode. 4. The communication device according to claim 2, wherein the signal transmitted and received in the second mode is synchronized with the timing of the signal transmitted and received in the first mode. 5. A signal transmitted / received by a time division multiple access method in the first mode and the second mode, and timings of time division slots of the signals transmitted / received in the first mode and the second mode are mutually synchronized. The communication device according to claim 4, wherein 6. The method according to claim 1, wherein when a signal arrives from the first party in the first mode, the incoming signal is transmitted to the second party in the second mode. The communication device described. 7. When the second partner enters a predetermined state after transmitting the incoming signal to the second partner, the communication between the first partner and the second partner is performed. 7. The mode shifts to a third mode that does not occur.
The communication device as described. 8. A voice transmitting means, a voice receiving means, and an operating means are further provided, and the other means alone via the public wireless telephone network and / or the private wireless telephone network and / or the wired communication network. The communication device according to claim 4, wherein the communication device can communicate with the device. 9. A wireless communication means for transmitting / receiving a signal to / from a first party in the first mode and a signal to / from a second party in the second mode, a voice transmitting means, a voice receiving means, An operation unit and a communication control unit for controlling the operation of each unit are provided, and the radio wave state in the first mode is monitored by a predetermined signal from the second partner during communication in the second mode. Then, when the monitored radio wave condition in the first mode satisfies a predetermined condition, the communication in the second mode is ended and the communication in the first mode is started. apparatus. 10. In the first mode, the base station of the public wireless telephone network operates as the terminal device which is the first partner, and in the second mode, the base station of the private wireless telephone network operates as the first station. The wireless communication device according to claim 9, wherein the wireless communication device operates as a terminal device of the second party. 11. The wireless communication apparatus according to claim 10, wherein signals are transmitted and received by a time division multiple access method in both the first mode and the second mode. 12. A signal from a first party is received in a first mode, and a signal is sent to a second party in a second mode in synchronization with the received signal from the first party. A communication method, characterized in that a communication line is secured between the first partner and the second partner, and mediates communication between the first partner and the second partner. . 13. The communication method according to claim 12, wherein signals are transmitted and received by a time division multiple access system in both the first and second modes. 14. When a signal from a second partner is received in the second mode and a predetermined signal from the second partner is received,
The line state of the first mode different from the second mode is monitored, and when the monitored line state of the first mode satisfies a predetermined condition, the communication of the second mode is terminated and A communication method, characterized in that the communication in the first mode is started. 15. The communication method according to claim 14, wherein signals are transmitted and received by a time division multiple access method in both the first and second modes.