JP5179002B2 - Telephone system, telephone control device, and program - Google Patents

Description

  The present invention relates to a telephone control technology, and more particularly to a telephone system in which a telephone line is shared by a plurality of telephones including a wireless telephone using a Bluetooth (registered trademark: Bluetooth) wireless communication system, and a radio channel used by these wireless telephones is managed. It relates to channel management technology.

In a telephone system such as a button telephone apparatus that shares a telephone line (external line) by a plurality of extension telephones, there is a telephone system that accommodates a Bluetooth radio telephone using a Bluetooth radio communication system as an extension telephone.
For example, in a curl cordless telephone comprising a wireless master unit connected to a telephone control device via a wired transmission line and a handset type wireless slave unit, voice data and control exchanged between the wireless master unit and the wireless slave unit It is configured to transmit and receive data using the Bluetooth wireless communication system, and a telephone can be communicated by the wireless slave unit even at a distance from the wireless master unit.

In such a Bluetooth wireless communication system that is a general-purpose wireless interface, a frequency hopping spread spectrum (FHSS) modulation system is used as a modulation system (see Non-Patent Document 1, etc.). The frequency hopping spread spectrum modulation system is a system in which the carrier frequency (center frequency) is changed at fixed time intervals, that is, the frequency hopping is performed for transmission.
In general, the power of any bandwidth is low when averaged over a sufficiently long time with respect to the frequency hopping period, so it is difficult to interfere with communication of other systems, and even if there is an interference wave at a specific frequency, It is said that it is resistant to interference from other systems because it hops to a frequency.

  In the Bluetooth wireless communication system, 79 or 23 channels are provided in the 2.4 GHz band at 1 MHz intervals, and the speed is 1600 times / second based on the channel selection order set between the master side and the slave side at the start of communication. Data communication is performed by repeating frequency hopping and transmitting / receiving a desired packet to / from a counterpart wireless device using a selected channel.

Conventionally, as such a frequency hopping technique, when a packet transmission / reception error occurs in an arbitrary channel due to a radio wave transmitted from another device, adaptive frequency hopping (hereinafter referred to as AFH: Adaptive) that disables the channel is used. (Frequency Hopping) technology is used (for example, see Non-Patent Document 2 / Bluetooth 1.2).
According to this adaptive frequency hopping technique, a channel determined to be unusable is excluded from the channel selection order, so that frequency hopping is no longer performed on the channel, and other channels at the carrier frequency of the channel Wireless communication interruption due to mutual interference of radio waves and collision of packet transmission / reception in the channel with the same type of wireless communication apparatus can be reduced.

On the other hand, as with the Bluetooth wireless communication system, wireless LAN communication using various spread spectrum modulation systems as a general-purpose wireless interface that performs wireless communication using ISM (Industrial Scientific Medical) band frequencies prepared for industrial scientific medicine. There are methods (see Non-Patent Document 3, etc.).
For example, in the IEEE 802.11g wireless LAN communication system, 13 channels are provided at 2.4 MHz intervals in the 2.4 GHz band, and wireless communication is performed by a CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) system.

  In the CSMA / CA method, first, before transmitting data from a channel to be used, it is checked whether another wireless communication apparatus is transmitting data on the channel (Carrier Sense), and further data addressed to itself is transmitted. (Sense Multiple Access). As a result, if it is determined that there is no risk of collision, data is transmitted, and if there is another wireless communication device in communication, transmission standby (Collision Avoidance) is entered. In transmission waiting, the above procedure is repeated again after waiting for a randomly assigned time. Further, when two wireless communication apparatuses collide for the first time at the same time, error recovery cannot be performed, so retransmission is performed at the higher layer level.

http://www.bluetooth.org/spec/ http://www.ericsson.com/bluetooth/files/whitepaper_on_afh_final.pdf http://grouper.ieee.org/groups/802/11/

  However, in such a conventional technology, when radio wave interference occurs between the wireless LAN communication device using the ISM band and the Bluetooth wireless telephone, the wireless communication environment of the wireless LAN communication device used together with the Bluetooth wireless telephone, or There was a problem that the wireless communication environment of the Bluetooth wireless telephone itself could not be kept good.

  For example, in the AFH of the Bluetooth wireless communication method, the carrier sense operation is not performed as in the wireless LAN communication method, the packet is transmitted / received through the selected channel, and the availability of the channel is determined according to the presence or absence of the communication error. Yes. For this reason, when a Bluetooth wireless telephone is used in the communication area of the wireless LAN communication device, depending on the timing of signal transmission / reception, the Bluetooth wireless telephone preferentially secures a channel, and the channel of the frequency corresponding to the wireless LAN communication device May not be secured, and the wireless communication environment of the wireless LAN communication device may deteriorate.

  The present invention is intended to solve such problems, and even when a wireless LAN communication apparatus using an ISM band is used in combination with a Bluetooth wireless telephone forming an extension telephone of a telephone system, a wireless communication environment in the ISM band is provided. It is an object of the present invention to provide a telephone system, a telephone control device, and a program that can maintain a good performance.

In order to achieve such an object, a telephone system according to the present invention connects a plurality of extension telephones including a radio telephone having a data communication function using a Bluetooth (registered trademark) radio communication system, and the extension telephones. And a telephone control apparatus that accommodates the telephone line, and the telephone control apparatus controls the extension telephone and the telephone line to arbitrarily exchange and connect the telephone using the telephone line. In the telephone system, the wireless telephone is notified from the telephone control device and communication control means for performing wireless data communication using a channel sequentially selected based on an arbitrary communication condition from a plurality of channels having different carrier frequencies. Communication condition instructing means for designating communication conditions as communication conditions for wireless data communication to the communication control means; Wireless LAN management means for acquiring wireless LAN channel information indicating a usage status of a wireless LAN channel used for voice packet communication in the wireless LAN base station from a wireless LAN base station connected via a LAN line, and a wireless LAN have a communication condition notifying means for notifying the new communication conditions generated from the channel information to the radio telephone, the communication condition notifying means, the channel number of the start of use was extracted from the wireless LAN channel information wireless LAN channels and use end radio channels To the wireless telephone as a communication condition, and the communication condition instructing means designates the Bluetooth channel number corresponding to the use start wireless LAN channel number included in the communication condition as an unusable channel to the communication control means, and is included in the communication condition. Bluetooth corresponding to the wireless LAN channel number for which use has ended It is obtained so as to specify the communication control means Le number as usable channels.

  Further, the communication condition notification means notifies the wireless telephone as the communication condition of the channel numbers of the use start wireless LAN channel and the use end wireless channel extracted from the wireless LAN channel information, and the communication condition instruction means The use start Bluetooth channel number included in the communication condition may be designated as an unusable channel in the communication control means, and the use end Bluetooth channel number contained in the communication condition may be designated as a usable channel in the communication control means.

The telephone control device according to the present invention wirelessly uses channels sequentially selected based on arbitrary communication conditions from a plurality of channels having different carrier frequencies by a data communication function using a Bluetooth (registered trademark) wireless communication system. Used in a telephone system having a plurality of extension telephones including a radio telephone for performing data communication and a telephone control device for connecting these extension telephones and accommodating a telephone line, and controls the extension telephone and the telephone line to arbitrarily A telephone control device that realizes a call by the extension telephone using the telephone line by switching connection, and used for voice packet communication from a wireless LAN base station connected via a LAN line to the wireless LAN base station wireless LAN management means for acquiring a wireless LAN channel information indicating a usage state of a wireless LAN channel and And a communication condition notifying means for notifying the wireless telephone as a new communication condition of the channel numbers of the use start wireless LAN channel and the use end wireless channel extracted from the wireless LAN channel information .

In addition, the program according to the present invention uses a data communication function using a Bluetooth (registered trademark) wireless communication system to perform wireless data communication using channels sequentially selected from a plurality of channels having different carrier frequencies based on arbitrary communication conditions. Used in a telephone system having a plurality of extension telephones including radio telephones and a telephone control device for connecting the extension telephones and accommodating a telephone line, and controlling the extension telephones and the telephone line to arbitrarily exchange and connect By doing so, the wireless LAN base station connected to the computer of the telephone control device that realizes a telephone call by the extension telephone using the telephone line is used for voice packet communication in the wireless LAN base station . Wireless LAN tube for acquiring wireless LAN channel information indicating the usage status of the wireless LAN channel And a communication condition notification step of notifying the wireless telephone of the Bluetooth channel numbers corresponding to the channel numbers of the use start wireless LAN channel and the use end wireless channel extracted from the wireless LAN channel information as new communication conditions . .

According to the present invention, in the telephone control device, the wireless LAN channel information indicating the usage status of the wireless LAN channel used for voice packet communication in the wireless LAN base station from the wireless LAN base station connected via the LAN line is obtained. The new communication conditions are notified to the wireless telephones of the channel numbers of the use start wireless LAN channel and the use end wireless channel extracted from the wireless LAN channel information, and each wireless telephone sets the carrier frequency based on the communication conditions. Wireless data communication is performed using channels sequentially selected from a plurality of different channels.
Thereby, based on the usage status of the wireless LAN channel in the wireless LAN base station, a new communication condition regarding each wireless data communication can be automatically set from the telephone control device to each wireless telephone.

  Therefore, even when a wireless LAN communication apparatus using the ISM band is used in combination with a Bluetooth wireless telephone which is an extension telephone of the telephone system, the wireless communication environment in the ISM band can be kept good. In addition, since a new communication condition is automatically set for each wireless telephone from the telephone control device, it is necessary for the user to set a communication condition such as setting a Bluetooth channel number that cannot be used by the Bluetooth wireless telephone. This eliminates the burden on the user.

Next, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
First, a telephone system according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of the telephone system according to the first embodiment of the present invention.

  In this telephone system, a plurality of wireless telephones 4 (4A, 4B, 4C,...) Operating as extension telephones are connected to the wireless telephones 4 via a wired extension transmission line 5, and an analog telephone line, ISDN line, Or it is comprised from the telephone control apparatus 1 which accommodates the 1 or more telephone line 9 which consists of an IP telephone line. The telephone control device 1 is connected to a wireless LAN base station 7 via a LAN line 8. The wireless LAN base station 7 is an access point (wireless LAN communication device) that implements data communication and voice communication with a wireless LAN device using a wireless LAN communication system.

  The radio telephone 4 is a curl cordless radio telephone composed of a curl cordless radio master unit (hereinafter referred to as “master unit”) 2 and a curl cordless radio slave unit (hereinafter referred to as “slave unit”) 3. The wireless telephone 4 is a telephone in which a base unit 2 having a call control function and a handset 3 having a call function are connected via a wireless transmission path using a Bluetooth wireless communication system. The base unit 2 is an extension transmission path 5. It is connected to the telephone control device 1 via.

  In the present embodiment, when the wireless telephone 4 performs wireless data communication using channels sequentially selected based on arbitrary communication conditions from among a plurality of channels having different carrier frequencies, the telephone control device 1 causes the LAN line 8 to be connected. Wireless LAN channel information indicating the usage status of the wireless LAN channel in the wireless LAN base station 7 is acquired from the wireless LAN base station 7 connected via the wireless LAN base station 7, and new communication conditions generated from the wireless LAN channel information are set for each wireless LAN. The telephone 4 is notified.

[Telephone control device]
Next, the telephone control device of the telephone system according to the first embodiment of the present invention will be described in detail with reference to FIG. Here, a case will be described as an example where all of the extension telephones are composed of wireless telephones 4.

  The telephone control device 1 is a communication control device corresponding to, for example, a main device of a button telephone device, and includes an external line interface unit (hereinafter referred to as an external line I / F unit) 10 and an internal line interface unit (hereinafter referred to as an internal line I / F unit). ) 11, a switch 12, a storage unit 14, and a control unit 15.

The external line I / F unit 10 includes a dedicated interface circuit unit, and has a function of terminating control of the telephone line (external line) 9 and the LAN line 8.
The extension I / F unit 11 includes a dedicated interface circuit unit, and has a function of performing data transmission with each of the radio telephones 4 (4A to 4N) via the extension transmission path 5.
The switch 12 includes a dedicated switching circuit unit and has a function of exchanging and connecting transmission lines between the external line I / F unit 10 and the internal line I / F unit 11.

The storage unit 14 includes a storage device such as a memory and a hard disk, and has a function of storing various processing information and programs used for processing in the control unit 15.
Main processing information includes call control information 14A and wireless LAN channel information 14B.
The call control information 14A is information used for call control of the entire telephone system, and the state of the telephone line 9 and each wireless telephone 4 is managed.
The wireless LAN channel information 14B includes the wireless LAN channel number obtained from the wireless LAN base station 7 and started to be used in wireless LAN voice packet communication at the wireless LAN base station 7, or the wireless LAN channel number of the wireless LAN channel that has been used. It is information to include.

The control unit 15 has a microprocessor such as a CPU and its peripheral circuits, and has a function of realizing various functional units by cooperating the hardware and the program by reading and executing the program of the storage unit 14. doing.
Main functional means include call control means 15A, wireless LAN management means 15B, and communication condition notification means 15C.

  The call control means 15A is means for performing call control of the entire telephone system, and controls the external line I / F unit 10 and the switch 12 based on the call control information 14A in the storage unit 14, and also the extension I / F unit 11 and the extension line. By exchanging various control information with each wireless telephone 4 through the transmission line 5, there is a function for controlling the external line outgoing / incoming operation by the wireless telephone 4 using the communication line 9 and the internal line outgoing / incoming operation between the wireless telephones 4. doing.

The wireless LAN management unit 15B performs data communication with the wireless LAN base station 7 via the LAN line 8 connected to the external line I / F unit 10, thereby obtaining the wireless LAN channel number used in the wireless LAN base station 7. It has a function of acquiring the channel usage status including it and storing it in the storage unit 14 as wireless LAN channel information 14B.
The communication condition notifying means 15C has a function of notifying each wireless telephone 4 and setting a new communication condition generated from the wireless LAN channel information 14B in the storage unit 14.

[Wireless telephone]
Next, a radio telephone used in the telephone system according to the first embodiment of the present invention will be described in detail with reference to FIG. FIG. 2 is a block diagram showing a configuration of a radio telephone used in the telephone system according to the first embodiment of the present invention.

  The wireless telephone 4 is a telephone in which a base unit 2 having a call control function and a handset 3 having a call function are connected via a wireless transmission path using a Bluetooth wireless communication system. The base unit 2 is an extension transmission path 5. It is connected to the telephone control device 1 via.

[Base unit]
The base unit 2 includes a transmission interface unit (hereinafter referred to as a transmission I / F unit) 20, an audio processing unit 21, a display unit 22, an operation input unit 23, a storage unit 24, a base unit control unit 25, and a wireless module 26. Is provided.

The transmission I / F unit 20 includes a dedicated interface circuit unit, and has a function of performing data transmission with the telephone control device 1 via the extension transmission path 5.
The audio processing unit 21 includes a dedicated audio processing circuit, a speaker (not shown), and a microphone (not shown), and the audio data received by the transmission I / F unit 20 in response to an instruction from the parent device control unit 25. Has a function of decoding the sound signal into a sound signal and outputting it from the speaker, and a function of coding the sound signal input from the microphone into sound data and outputting it to the transmission I / F unit 20.

The display unit 22 includes a display device such as an LCD or an LED, and has a function of displaying a display for call control and an item selection screen for setting communication conditions in response to an instruction from the parent device control unit 25.
The operation input unit 23 includes a dial key, item selection operation keys, and various switches, and has a function of detecting a user operation and outputting it to the parent device control unit 25.
The storage unit 24 includes a storage device such as a memory, and has a function of storing various processing information and programs used for processing in the parent device control unit 25.

The base unit control unit 25 has a microprocessor such as a CPU and its peripheral circuits, and reads and executes the program in the storage unit 14 so that the hardware and the program cooperate to realize various functional units. have.
The main functional means includes call control means 25A and communication condition instruction means 25B.

  The call control means 25A exchanges various control information with the telephone control device 1 through the transmission I / F unit 20 and the extension transmission line 5, and exchanges various control information with the slave unit 3 through the wireless module 26. Thus, it has a function of controlling the parent device 2 and the child device 3 to control the outgoing / incoming operation using the communication line 9 and the outgoing / incoming operation with the other wireless telephones 4.

  Based on the wireless LAN channel number included in the communication condition notified from the telephone control device 1, the communication condition instructing unit 25B is used for wireless data communication between the base unit 2 and the handset 3 of the wireless telephone 4 It has a function of generating a communication condition indicating a channel number and designating it to the wireless module 26. In particular, the communication condition instructing unit 25B designates the Bluetooth channel number corresponding to the use start wireless LAN channel number included in the communication condition as an unusable channel, and the Bluetooth channel corresponding to the use end wireless LAN channel number included in the communication condition. Specify the number as an available channel. For this channel conversion, a channel number extraction table as shown in FIG. 3 may be used, or conversion may be performed by a predetermined mathematical expression.

The wireless module 26 is a functional module that provides a wireless interface compliant with the Bluetooth wireless communication system, and various functional units are integrally mounted as one constituent element constituting the parent device 2.
The main functional units provided in the wireless module 26 include a wireless transmission / reception unit 27, a module storage unit 28, and a module control unit 29.

  The wireless transmission / reception unit 27 is a circuit unit that transmits / receives a wireless signal in accordance with the Bluetooth wireless communication method, and has a function of performing data communication via the wireless line 6 by transmitting / receiving a wireless signal to / from the slave unit 3. Have. At this time, the radio transmission / reception unit 27 repeats frequency hopping based on an instruction from the module control unit 29 for 79 channels or 23 channels provided in the 2.4 GHz band at 1 MHz intervals based on the frequency hopping spread spectrum modulation method, Data communication is performed by transmitting / receiving a desired packet to / from slave unit 3 using the channel selected by the frequency hopping.

The module storage unit 28 includes a storage device such as a memory, and has a function of storing various processing information used for processing operations in the module control unit 29. As main processing information stored in the module storage unit 28, there is a channel table 28A.
The channel table 28A is processing information for managing the availability of each channel that is sequentially selected by the frequency hopping spread spectrum modulation method. As shown in FIG. 4, the availability information of the channel is stored for each Bluetooth channel number. Registered in association.
In addition, the module storage unit 28 may store a program for realizing various functional units by being read and executed by the module control unit 29 in advance.

  The module control unit 29 cooperates with hardware composed of a CPU and its peripheral circuits, a memory (not shown) provided in these CPUs or peripheral circuits, and a program stored in the module storage unit 28 in advance. Functional means for controlling the wireless transmission / reception unit 27 in accordance with the Bluetooth wireless communication system is realized.

The main functional means realized by the module control unit 29 is a communication control means 29A.
The communication control unit 29A controls the wireless transmission / reception unit 27 to control data communication between the child device 3 and the parent device control unit 25, and the frequency hopping / spread spectrum modulation method. And a function of sequentially selecting one of the channels based on the order of channel selection decided at the start of data communication and instructing the wireless transmission / reception unit 27. At this time, the communication control unit 29A refers to the channel table 28A of the module storage unit 28, and if the next channel selected in accordance with the channel selection order is not usable, the communication control unit 29A skips to the next available channel and uses the channel. Select the channel.

  In addition, the communication control means 29A has a function of notifying the parent device control unit 25 of the communication status of packet transmission / reception with the child device 3 in the channel selected by frequency hopping during data communication, and an instruction from the parent device control unit 25. In response to the function, the channel table 28A of the module storage unit 28 updates the availability information of an arbitrary channel, and the channel table 28A of the module storage unit 28 is notified to the slave unit 3 in response to an instruction from the parent device control unit 25. And a function of updating.

[Cordless handset]
The handset 3 includes a voice processing unit 31, a display unit 32, an operation input unit 33, a storage unit 34, a handset control unit 35, and a wireless module 36.

  The audio processing unit 31 includes a dedicated audio processing circuit, a speaker (not shown), and a microphone (not shown), and receives audio data received by the wireless module 36 in response to an instruction from the child device control unit 35. And a function of encoding a sound signal input from the microphone into sound data and outputting the sound data to the wireless module 36.

The display unit 32 includes a display device such as an LCD or an LED, and has a function of performing display for call control in response to an instruction from the child device control unit 35.
The operation input unit 33 includes operation keys such as dial keys and various switches, and has a function of detecting a user operation and outputting the operation to the child device control unit 35.
The storage unit 34 includes a storage device such as a memory, and has a function of storing various processing information and programs used for processing in the slave unit control unit 35.

The slave unit control unit 35 has a microprocessor such as a CPU and its peripheral circuits, and reads and executes the program in the storage unit 14 to realize various functions by cooperating the hardware and the program.
Main functions include a function for controlling the operation state of the child device 3 by exchanging various control information with the parent device 2 via the wireless line 6 and the wireless module 36, and an operation detected by the operation input unit 33. Has a function of notifying the parent machine 2 of the contents of

The wireless module 36 is a functional module that provides a wireless interface that is compliant with the Bluetooth wireless communication system, and various functional units are integrally mounted as one component constituting the handset 3.
The specific configuration of the wireless module 36 is the same as that of the wireless module 26 of the parent device 2, and detailed description thereof is omitted here.

[Operation of First Embodiment]
Next, the operation of the telephone system according to the first embodiment of the present invention will be described with reference to FIG. FIG. 5 is a sequence diagram showing a communication condition setting operation as the operation of the telephone system according to the first embodiment of the present invention.
Here, the wireless control device 1 acquires wireless LAN channel information 14B including the wireless LAN channel number used in the wireless LAN base station 7 from the wireless LAN base station 7 via the LAN line 8, and this wireless LAN channel A case where a new communication condition generated from the information 14B is notified to each wireless telephone 4 and set will be described as an example.

  The control unit 15 of the telephone control device 1 performs voice packet communication via the wireless LAN base station 7 from the wireless LAN base station 7 via the external line I / F unit 10 and the LAN line 8 by the wireless LAN management unit 15B. Wireless LAN channel information 14B indicating the usage status of the used wireless LAN channel is acquired and stored in the storage unit 14 (step 100). The wireless LAN channel information 14B may be only the channel number of the wireless LAN channel that has been used / stopped, or information that indicates whether each wireless LAN channel number is usable.

  As for the method of acquiring the wireless LAN channel information 14B, the wireless LAN base station 7 may notify the telephone control device 1 of the wireless LAN channel information periodically or according to a change in usage status. Alternatively, the wireless LAN management unit 15B of the telephone control device 1 may extract the wireless LAN channel information 14B by monitoring the control packet transmitted from the wireless LAN base station 7, or the wireless LAN management unit of the telephone control device 1 The wireless LAN channel information 14B may be acquired by making an inquiry to the wireless LAN base station 7 from 15B.

  When new wireless LAN channel information 14B is acquired by the wireless LAN management unit 15B, the communication condition notifying unit 15C reads the wireless LAN channel information 14B from the storage unit 14, and starts and ends use at the wireless LAN base station 7. The channel number of the obtained wireless LAN channel is extracted. Here, when the channel number of the use start wireless LAN channel is extracted, a new communication condition composed of the wireless LAN channel number is notified from the extension I / F unit 11 via the extension transmission path 5 to each wireless telephone 4A by setting notification. (Step 101).

  When the base unit control unit 25 of the base unit 2 constituting the wireless telephone 4 receives the setting notification from the telephone control device 1 via the transmission I / F unit 20, the communication condition instructing unit 25B notifies this setting notification. The use start wireless LAN channel number included in the new communication condition is converted into a Bluetooth channel number (step 102).

Subsequently, the communication condition instructing unit 25B specifies the Bluetooth channel number corresponding to the use start wireless LAN channel number obtained by the conversion to the wireless module 26 as an unusable channel.
The module control unit 29 of the wireless module 26 registers the unusable channel designated by the communication condition instruction unit 25B in the channel table 28A of the module storage unit 28 by the communication control unit 29A (step 103).

  Further, the communication condition instructing unit 25B instructs the wireless module 26 to synchronize the channel table to the handset 3. In response to this, the communication control unit 29A reads the channel table 28A of the module storage unit 28 and notifies the slave unit 3 from the wireless transmission / reception unit 27 via the wireless line 6. The wireless module 36 of the child device 3 updates its own module table based on the contents of the channel table 28A notified from the wireless module 26 of the parent device 2. As a result, the contents of the module table are synchronized between the parent device 2 and the child device 3, the same unusable channels are recognized (step 104), and the wireless LAN base station 7 starts using them for voice packet communication. The Bluetooth channel corresponding to the wireless LAN channel becomes unusable.

Thereafter, the control unit 15 of the telephone control apparatus 1 acquires new wireless LAN channel information 14B from the wireless LAN base station 7 via the external line I / F unit 10 and the LAN line 8 by the wireless LAN management unit 15B, and stores it. Stored in the unit 14 (step 110).
Here, when the voice packet communication is completed in the wireless LAN base station 7, the channel number of the wireless LAN channel that has been used is extracted from the new wireless LAN channel information 14B in the storage unit 14, and the wireless LAN channel number is extracted from the wireless LAN channel number. A new communication condition is notified from the extension I / F unit 11 to the respective radio telephones 4A via the extension transmission path 5 by setting notification (step 111).

  When the base unit control unit 25 of the base unit 2 constituting the wireless telephone 4 receives the setting notification from the telephone control device 1 via the transmission I / F unit 20, the communication condition instructing unit 25B notifies this setting notification. The use-terminated wireless LAN channel number included in the new communication condition is converted into a Bluetooth channel number (step 112).

Subsequently, the communication condition instructing unit 25B designates, to the wireless module 26, the Bluetooth channel number corresponding to the use-terminated wireless LAN channel number obtained by the conversion as an available channel.
The module control unit 29 of the wireless module 26 registers the usable channel designated by the communication condition instruction unit 25B in the channel table 28A of the module storage unit 28 by the communication control unit 29A (step 113).

  Further, the communication condition instructing unit 25B instructs the wireless module 26 to synchronize the channel table to the handset 3. In response to this, the communication control unit 29A reads the channel table 28A of the module storage unit 28 and notifies the slave unit 3 from the wireless transmission / reception unit 27 via the wireless line 6. The wireless module 36 of the child device 3 updates its own module table based on the contents of the channel table 28A notified from the wireless module 26 of the parent device 2. As a result, the contents of the module table are synchronized between the parent device 2 and the child device 3, the same usable channel is recognized (step 114), and the wireless LAN base station 7 corresponds to the wireless LAN channel whose use has been terminated. The Bluetooth channel to be used can be used.

  As described above, the present embodiment provides a communication control means for performing wireless data communication using a channel sequentially selected based on an arbitrary communication condition from among a plurality of channels having different carrier frequencies, and a telephone control device. A communication condition instructing means for designating the communication condition notified from the communication control means as a communication condition for wireless data communication, and a wireless LAN base connected via a LAN line by the wireless LAN management means in the telephone control device The wireless LAN channel information indicating the use status of the wireless LAN channel in the wireless LAN base station is acquired from the station, and the communication condition notification means notifies the wireless telephone of the new communication condition generated from the wireless LAN channel information. did.

Thereby, based on the usage status of the wireless LAN channel in the wireless LAN base station, a new communication condition regarding each wireless data communication can be automatically set from the telephone control device to each wireless telephone.
Therefore, even when a wireless LAN communication apparatus using the ISM band is used in combination with a Bluetooth wireless telephone which is an extension telephone of the telephone system, the wireless communication environment in the ISM band can be kept good. In addition, since a new communication condition is automatically set for each wireless telephone from the telephone control device, it is necessary for the user to set a communication condition such as setting a Bluetooth channel number that cannot be used by the Bluetooth wireless telephone. This eliminates the burden on the user.

  In the present embodiment, the telephone control device notifies the wireless telephones of channel numbers of the use start wireless LAN channel and use end wireless channel extracted from the wireless LAN channel information as new communication conditions. The Bluetooth channel number corresponding to the start-use wireless LAN channel number included in the new communication condition is designated as an unusable channel, and the Bluetooth channel number corresponding to the end-of-use wireless LAN channel number included in the new communication condition is used Therefore, it is possible to designate whether or not the Bluetooth channel corresponding to the wireless LAN channel can be used only during the period when the voice packet communication is performed in the wireless LAN base station, and the wireless channel can be used extremely effectively.

  In the present embodiment, the telephone control device generates new communication conditions from wireless LAN channel information related to the wireless LAN channel used in voice packet communication among the wireless LAN channels used in the wireless LAN base station. Thus, it is possible to disable only the channels that have a large influence on both the wireless LAN communication method and the Bluetooth wireless communication method, and the wireless channel can be used very effectively.

  In voice packet communication at a wireless LAN base station, it is necessary to continuously transmit and receive voice packets in order to maintain voice quality. When the same carrier frequency is shared by the Bluetooth wireless communication system, voice communication on the wireless LAN side is required. There is a significant drop in voice quality due to sound skipping, and packet retransmission also increases on the Bluetooth side, resulting in a reduction in communication rate. On the other hand, in data communication other than voice packet communication at a wireless LAN base station, data packets are transmitted and received intermittently. Therefore, even when the same carrier frequency is shared by the Bluetooth wireless communication system, both are not significantly affected.

Therefore, by targeting the wireless LAN channel used in voice packet communication, it is possible to disable only the channel that has a large influence on both the wireless LAN communication method and the Bluetooth wireless communication method, and the wireless channel It can be used effectively.
Note that the wireless LAN base station knows the type of protocol used in each wireless LAN channel and exchanges packets of protocols used for voice packet communication such as SIP. It can be easily determined whether or not it is used for packet communication.

  In this embodiment, the channel number of the wireless LAN channel used in the wireless LAN base station is notified from the telephone control device to each wireless telephone, and the Bluetooth channel number corresponding to the wireless LAN channel number is transmitted from each wireless telephone. Therefore, the telephone control device 1 has only to notify each wireless telephone of the wireless LAN channel number acquired from the wireless LAN base station, and the processing load on the telephone control device 1 is reduced. Can be reduced.

[Second Embodiment]
Next, with reference to FIG. 6, a telephone system according to a second embodiment of the present invention is described. FIG. 6 is a sequence diagram showing a communication condition setting operation as an operation of the telephone system according to the second embodiment of the present invention.

  In the first embodiment (see FIG. 5), the channel number of the wireless LAN channel used in the wireless LAN base station is notified from the telephone control device to each wireless telephone as a communication condition, and the wireless telephone uses the wireless LAN channel. The case of converting to a Bluetooth channel number has been described. In the present embodiment, a case will be described in which a telephone control device converts a channel number of a wireless LAN channel used in a wireless LAN base station into a Bluetooth channel number and then notifies each wireless telephone as a communication condition.

The telephone control device 1, the wireless telephones 4, and other configurations of the telephone system according to the present embodiment are the same as those in the first embodiment (see FIG. 1) described above, and detailed description here. Is omitted. For channel conversion, a channel number extraction table as shown in FIG. 4 may be used, or conversion may be performed using a predetermined mathematical expression.

The operation of the telephone system according to the present embodiment is different from that in FIG. 5 described above in that the telephone control device 1 performs a process of converting a wireless LAN channel number into a Bluetooth channel number.
That is, the control unit 15 of the telephone control apparatus 1 acquires the wireless LAN channel information 14B from the wireless LAN base station 7 by the wireless LAN management unit 15B (step 200), and then transmits the wireless LAN channel information by the communication condition notification unit 15C. The channel number of the use start wireless LAN channel extracted from 14B is converted into a Bluetooth channel number (step 201), and the obtained unusable Bluetooth channel number is notified to the wireless telephone 4 by a setting notification as a new communication condition (step 202). ).

The base unit control unit 25 of the base unit 2 constituting the wireless telephone 4 designates the unusable Bluetooth channel number included in the new communication condition notified by the setting notification to the wireless module 26 by the communication condition instruction unit 25B.
The module control unit 29 of the wireless module 26 registers the unusable channel specified by the communication condition instruction unit 25B by the communication control unit 29A in the channel table 28A of the module storage unit 28 (step 203). The contents of the module table are synchronized with the handset 3 (step 204).

  In addition, the control unit 15 of the telephone control device 1 acquires the wireless LAN channel information 14B from the wireless LAN base station 7 by the wireless LAN management unit 15B (step 210), and then transmits the wireless LAN channel information by the communication condition notification unit 15C. The channel number of the end-of-use wireless LAN channel extracted from 14B is converted into a Bluetooth channel number (step 211), and the obtained usable Bluetooth channel number is notified to the wireless telephone 4 by a setting notification as a new communication condition (step 212). ).

The base unit control unit 25 of the base unit 2 specifies the usable Bluetooth channel number included in the new communication condition notified by the setting notification to the wireless module 26 by the communication condition instruction unit 25B.
The module control unit 29 of the wireless module 26 registers the usable channel designated by the communication condition instruction unit 25B in the channel table 28A of the module storage unit 28 by the communication control unit 29A (step 213). The contents of the module table are synchronized with the handset 3 (step 214).

  As described above, in the present embodiment, the telephone control device notifies the wireless telephone as the communication condition of the channel number of the use start wireless LAN channel and the use end wireless channel extracted from the wireless LAN channel information. In each wireless phone, the use start Bluetooth channel number included in the new communication condition is designated as an unusable channel in the communication control means, and the use end Bluetooth channel number included in the communication condition is designated as a usable channel in the communication control means. Since channel conversion is performed collectively by the telephone control device, it is not necessary to perform channel conversion at each wireless telephone, and the processing burden on each wireless telephone can be reduced.

[Extended embodiment]
In each of the above embodiments, the case where the Bluetooth wireless communication system is used when connecting the base unit 2 and the handset 3 via a wireless line in the wireless telephone 4 has been described as an example. The usage is not limited to this. For example, even if the extension telephone uses the Bluetooth wireless communication system for data communication with other terminal devices, the extension telephone is regarded as the wireless telephone 4. Each embodiment can be carried out in the same manner as described above, and the same effects can be obtained.

  In each of the above embodiments, the case where the communication condition instruction means 25B is provided in the parent device control unit 25 of the parent device 2 constituting the wireless telephone 4 has been described as an example. It may be realized by the control unit 29 and can be implemented in the wireless module as one of the frequency hopping functions of the Bluetooth wireless communication system. As a result, the processing in the base unit control unit 25 can be greatly reduced, the program executed in the base unit control unit 25 can be simplified, and an inexpensive wireless communication apparatus as a whole can be realized.

It is a block diagram which shows the structure of the telephone system concerning the 1st Embodiment of this invention. It is a block diagram which shows the structure of the radio | wireless telephone set used with the telephone system concerning the 1st Embodiment of this invention. It is an example of a structure of a channel number conversion table. It is a structural example of a channel table. It is a sequence diagram which shows communication condition setting operation | movement as operation | movement of the telephone system concerning the 1st Embodiment of this invention. It is a sequence diagram which shows communication condition setting operation | movement as operation | movement of the telephone system concerning the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Telephone control apparatus, 10 ... External line I / F part, 11 ... Extension I / F part, 12 ... Switch, 14 ... Memory | storage part, 14A ... Call control information, 14B ... Wireless LAN channel information, 15 ... Control part, 15A ... Call control means, 15B ... Wireless LAN management means, 15C ... Communication condition notification means, 2 ... Master unit, 20 ... Transmission I / F part, 21 ... Audio processing part, 22 ... Display part, 23 ... Operation input part, 24 DESCRIPTION OF SYMBOLS Storage unit 25 Master unit control unit 25A Call control unit 25B Communication condition instruction unit 26 Wireless module 27 Radio transmission / reception unit 28 Module storage unit 28A Channel table 29 Module control 29A ... Communication control means, 3 ... Slave unit, 31 ... Audio processing unit, 32 ... Display unit, 33 ... Operation input unit, 34 ... Storage unit, 35 ... Slave unit control unit, 36 ... Wireless module, 4 and 4A ~ 4N ... wireless telephone, ... extension transmission line, 6 ... wireless line 7 ... wireless LAN base station, 8 ... LAN line, 9 ... communication line.

Claims (4)

A plurality of extension telephones including a wireless telephone having a data communication function using a Bluetooth (registered trademark) wireless communication system; and a telephone control device for connecting the extension telephones and accommodating a telephone line; A telephone system that realizes a call by the extension telephone using the call line by controlling the extension telephone and the call line to be arbitrarily switched and connected,
The radiotelephone includes communication control means for performing radio data communication using a channel sequentially selected based on an arbitrary communication condition from a plurality of channels having different carrier frequencies, and the communication condition notified from the telephone controller. Communication condition indicating means for designating the communication control means as communication conditions for wireless data communication;
The telephone control apparatus obtains wireless LAN channel information indicating a use state of a wireless LAN channel used for voice packet communication in the wireless LAN base station from a wireless LAN base station connected via a LAN line. It means, and a communication condition notifying means for notifying the new communication conditions generated from the wireless LAN channel information to the radio telephone set to Yes,
The communication condition notifying means notifies the wireless telephone as the communication condition of channel numbers of the use start wireless LAN channel and use end wireless channel extracted from the wireless LAN channel information,
The communication condition instructing means designates a Bluetooth channel number corresponding to the use start wireless LAN channel number included in the communication condition as an unusable channel to the communication control means, and the use end wireless LAN channel number included in the communication condition A telephone system , wherein a Bluetooth channel number corresponding to is designated as an available channel in the communication control means . The telephone system according to claim 1, wherein
The communication condition notifying unit notifies the wireless telephone as the communication condition of a Bluetooth channel number corresponding to a channel number of a use start wireless LAN channel and a use end wireless channel extracted from the wireless LAN channel information,
The communication condition instructing unit designates the use start Bluetooth channel number included in the communication condition as an unusable channel to the communication control unit, and uses the use end Bluetooth channel number included in the communication condition as the usable channel. A telephone system characterized by being designated as a means. A plurality of extensions including wireless telephones that perform wireless data communication using channels sequentially selected based on arbitrary communication conditions from a plurality of channels having different carrier frequencies by a data communication function using a Bluetooth (registered trademark) wireless communication system Used in a telephone system having a telephone and a telephone control apparatus for connecting these extension telephones and accommodating a telephone line, and controlling the extension telephone and the telephone line to arbitrarily exchange and connect the telephone line. A telephone control device for realizing a telephone call using the extension telephone used,
Wireless LAN management means for acquiring wireless LAN channel information indicating a usage status of a wireless LAN channel used for voice packet communication in the wireless LAN base station from a wireless LAN base station connected via a LAN line;
Communication condition notifying means for notifying the wireless telephone as a new communication condition of the channel number of the use start wireless LAN channel and the use end wireless channel extracted from the wireless LAN channel information. A telephone control device. A plurality of extensions including wireless telephones that perform wireless data communication using channels sequentially selected based on arbitrary communication conditions from a plurality of channels having different carrier frequencies by a data communication function using a Bluetooth (registered trademark) wireless communication system Used in a telephone system having a telephone and a telephone control apparatus for connecting these extension telephones and accommodating a telephone line, and controlling the extension telephone and the telephone line to arbitrarily exchange and connect the telephone line. In the computer of the telephone control device that realizes a call by the extension telephone used,
A wireless LAN management step of acquiring wireless LAN channel information indicating a use state of a wireless LAN channel used for voice packet communication in the wireless LAN base station from a wireless LAN base station connected via a LAN line;
A communication condition notification step of notifying the wireless telephone as a new communication condition of a Bluetooth channel number corresponding to a channel number of a use start wireless LAN channel and a use end wireless channel extracted from the wireless LAN channel information .

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