JP2007096444A - Telephone system, telephone control unit, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a telephone system, a telephone control unit, and a program capable of excellently maintaining a wireless communication environment for an ISM band even when wireless LANs and various ISM apparatuses using the ISM band are used together with Bluetooth wireless telephone sets acting like extension telephone sets in the telephone system. <P>SOLUTION: The telephone control unit 1 stores system shared channel information 14B and telephone set depending channel information 14C for representing the propriety of use of each channel used for wireless data communication by each wireless telephone set 4 to a storage section 14, and informs each wireless telephone set 4 about a new communication condition generated from the channel information and sets the condition thereto. The system shared channel information 14B and the telephone set depending channel information 14C are composed to generate the new communication condition. <P>COPYRIGHT: (C)2007,JPO&INPIT

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 technique, when radio wave interference occurs between a wireless LAN communication device using various ISM bands and various devices and a Bluetooth wireless telephone, an ISM band such as a wireless LAN communication apparatus used together with the Bluetooth wireless telephone is used. There is a problem that the wireless communication environment of other wireless communication apparatuses using the wireless communication device or the wireless communication environment of the Bluetooth wireless telephone itself cannot be maintained satisfactorily.

  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.

  Also, when there are ISM devices that use the ISM band, such as microwave electronic devices such as microwave ovens and medical scalpels, amateur radio devices, etc., the Bluetooth wireless communication system uses AFH to select the frequency channel used by these ISM devices. In response to the occurrence of a communication error, the avoidance operation for making the channel unusable is performed. However, when processing time such as statistical processing is required in the avoiding operation, the communication quality is temporarily lowered, but the wireless communication environment of the Bluetooth wireless telephone itself is deteriorated.

  The present invention is intended to solve such problems. Even when a wireless LAN using an ISM band or various ISM devices are used in combination with a Bluetooth wireless telephone which is an extension telephone of a telephone system, wireless communication in the ISM band is possible. An object of the present invention is to provide a telephone system, a telephone control device, and a program that can maintain a good communication environment.

  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 channels sequentially selected from a plurality of channels having different carrier frequencies based on arbitrary communication conditions Communication condition instructing means for designating communication conditions as communication conditions for wireless data communication to the communication control means, and A storage unit for storing channel information indicating availability of each channel used for wireless data communication in the wireless telephone, and a communication condition notifying unit for notifying the wireless telephone of a new communication condition generated from the channel information in the storage unit. Have.

  At this time, as the channel information, system common channel information that is commonly applied to all wireless telephones and telephone channel information that is individually applied to each wireless telephone, the communication condition notifying means can arbitrarily When a new communication condition to be notified to the wireless telephone is generated, the new communication condition may be generated by combining the system common channel information in the storage unit and the channel-specific channel information of the wireless telephone.

  In addition, when a communication condition is generated by the communication condition notification means, if any channel is set to be unusable in at least one of the system common channel information and the telephone channel information, the channel is not usable. You may make it judge.

  As channel information, system common channel information that is commonly applied to all wireless telephones may be used, or telephone channel information that is individually applied to each wireless telephone may be used.

  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 telephone call by the extension telephone using the telephone line by switching connection, and a storage unit that stores channel information indicating availability of each channel used for wireless data communication with the wireless telephone; A communication condition notification means for notifying the wireless telephone of the communication condition generated from the channel information in the storage unit Yes.

  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 Storing in the storage unit channel information indicating whether or not each channel used for wireless data communication in the wireless telephone is stored in the computer of the telephone control device that realizes a telephone call by the extension telephone using the telephone line. The communication condition notification for notifying the wireless telephone of the communication condition generated from the channel information in the storage unit Intelligent step.

According to the present invention, in the telephone control device, channel information indicating the availability of each channel used for wireless data communication with the wireless telephone is stored in the storage unit, and the communication condition setting means determines from the channel information in the storage unit. Since the generated communication condition is notified to the wireless telephone, the wireless telephone performs wireless data communication using a channel sequentially selected from a plurality of channels having different carrier frequencies based on the communication condition.
Therefore, even when a wireless LAN that uses the ISM band or various ISM devices are used in combination with a Bluetooth wireless telephone that is an extension telephone of the telephone system, the wireless communication environment in the ISM band can be maintained well.

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 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 wireless data communication is performed using a channel sequentially selected based on an arbitrary communication condition from a plurality of channels having different carrier frequencies in the wireless telephone 4, the telephone control device 1 causes the wireless telephone 4 to Channel information indicating the availability of each channel used for wireless data communication with the wireless telephone is stored in a storage unit, and communication conditions generated from the channel information are notified to the wireless telephone 4.

[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 is composed of a dedicated interface circuit unit, and has a function of terminating control of the telephone line (external line) 9.
The extension I / F unit 11 includes a dedicated interface circuit unit, and has a function of performing data transmission with the radio telephone 4 (4A, 4B, 4C,...) 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, system common channel information 14B, and telephone-specific channel information 14C.

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 system common channel information 14B is information indicating whether or not each channel can be used as a communication condition regarding wireless data communication in each wireless telephone 4, and is commonly applied to all wireless telephones 4 in the telephone system. FIG. 3 is a configuration example of system common channel information. In the system common channel information 14B, the channel number of each channel used for wireless data communication in each wireless telephone 4 and its availability are registered as a set.

  The channel-specific channel information 14C is information indicating whether or not each channel can be used as a communication condition related to wireless data communication in each wireless telephone 4, and is individually applied to each wireless telephone 4 in the telephone system. FIG. 4 is a configuration example of channel information for each telephone. In the channel information 14C for each telephone, a wireless telephone ID for identifying the wireless telephone 4, a channel number of each channel used for wireless data communication with the wireless telephone 4 and the availability thereof are registered as a set.

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. is doing.
Main functional means include call control means 15A, channel setting 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 in the storage unit 14, and the extension I / F unit 11 and extension transmission. By exchanging various control information with each wireless telephone 4 via the path 5, it has a function of controlling the external line incoming / outgoing operation by the wireless telephone 4 using the communication line 9 and the internal line outgoing / incoming operation between the wireless telephones 4. ing.

  The channel setting means 15B is a communication condition relating to wireless data communication in the wireless telephone 4 from a setting telephone consisting of any of the extension telephones connected to the telephone control apparatus 1 or an external apparatus connected to the telephone control apparatus 1. It has a function of accepting the availability of each channel used in wireless data communication, and a function of updating the system common channel information 14B and the telephone-specific channel information 14C in the storage unit 14 based on the accepted contents.

  The communication condition notifying unit 15C corresponds to the radio telephone corresponding to the communication condition obtained by combining the system common channel information 14B, the telephone-specific channel information 14C, or the system common channel information 14B and the telephone-specific channel information 14C in the storage unit 14. 4 and a function to notify and set.

[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.
The communication condition instructing unit 25B has a function of designating the communication condition notified from the telephone control device 1 to the wireless module 26 as a communication condition for wireless data communication between the parent device 2 and the child device 3 of the wireless telephone 4. is doing.

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, and the availability information of the channel is registered in association with each channel number.
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 system common channel information 14B and the channel-specific channel information 14C preset in the telephone control device 1 as communication conditions regarding the wireless data communication in each wireless telephone 4 are synthesized for each wireless telephone 4 and obtained. A case where communication conditions are notified to each wireless telephone 4 and set will be described as an example.

When the control unit 15 of the telephone control apparatus 1 is restarted or when the system common channel information 14B and the telephone-specific channel information 14C are updated from a setting telephone or an external apparatus, the communication condition notification means 15C causes each wireless telephone 4 Notify and set new communication conditions.
First, the communication condition notifying unit 15C selects an arbitrary wireless telephone 4 whose channel information has not been updated, for example, the wireless telephone 4A (step 100), and reads the system common channel information 14B and the telephone-specific channel information 14C from the storage unit 14. A new communication condition is generated by combining (step 101).

  FIG. 6 is an example of generating communication conditions. If a channel used for wireless data communication with the wireless telephone 4 is set to be unusable in either the system common channel information 14B or the telephone-specific channel information 14C, the channel is not usable. In the example of FIG. 6, for each channel of the system common channel information 14B and the channel-specific channel information 14C, the availability is set to “0” and the availability is set to “1”. The communication condition 14D is generated.

  The control unit 15 of the telephone control device 1 generates a new communication condition of the wireless telephone 4A in this way by the communication condition notification means 15C, and then sets a new communication condition of the wireless telephone 4A, for example, an unusable channel. The / F unit 11 notifies the wireless telephone 4A via the extension transmission path 5 (step 102).

When the base unit control unit 25 of the base unit 2 constituting the wireless telephone 4A receives the setting notification from the telephone control device 1 via the transmission I / F unit 20, it is included in the setting notification by the communication condition instruction unit 25B. An unusable channel with a new communication condition is designated to the wireless module 26 (step 103).
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.

  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, and the same unusable channels are recognized (step 104).

  Next, the control unit 15 of the telephone control device 1 selects an arbitrary wireless telephone 4 that has not been updated with channel information, for example, the wireless telephone 4B, by the communication condition notification means 15C (step 110), and stores the storage unit in the same manner as described above. The system common channel information 14B and the telephone-specific channel information 14C are read from 14 and combined to generate a new communication condition (step 111). Thereafter, the communication condition notifying unit 15C notifies the wireless telephone 4A of the new communication condition of the wireless telephone 4A from the extension I / F unit 11 via the extension transmission path 5 (step 112).

When the base unit control unit 25 of the base unit 2 constituting the wireless telephone 4B receives the setting notification from the telephone control device 1 via the transmission I / F unit 20, the communication condition instructing unit 25B includes the setting notification. The unusable channel to be used is designated to the wireless module 26 (step 113).
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.

  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, and the same unusable channels are recognized (step 114).

  Thereafter, the control unit 15 of the telephone control device 1 notifies the wireless telephone 4 of new communication conditions generated from the system common channel information 14B and the telephone-specific channel information 14C for each wireless telephone 4, and updates all the wireless telephones. After the communication conditions of the telephone 4 are updated, the series of communication condition setting operations is terminated.

  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 condition to the communication control means as a communication condition for wireless data communication, and a channel indicating whether or not each channel used for wireless data communication in the wireless telephone is usable in the telephone control device Information is stored, and a new communication condition generated from the channel information is notified to the wireless telephone and set by the communication condition setting means.

As a result, communication conditions relating to wireless data communication can be set for each wireless telephone from the telephone control device, and a channel used for wireless data communication in each wireless telephone is selected based on the set communication conditions. .
Therefore, even when a wireless LAN that uses the ISM band or various ISM devices are used in combination with a Bluetooth wireless telephone that is an extension telephone of the telephone system, the wireless communication environment in the ISM band can be maintained well.

  In addition, as channel information, system common channel information that is commonly applied to all wireless telephones and channel-specific channel information that is individually applied to each wireless telephone are stored and notified to any wireless telephone. When generating a new communication condition, a new communication condition may be generated by combining the system common channel information in the storage unit and the channel-specific channel information of the wireless telephone. Thereby, even when a wide range of radio wave interference and a narrow range of radio wave interference coexist, new communication conditions can be set collectively and flexibly for each wireless telephone.

  When creating a communication condition, if any channel is set to be unusable in at least one of system common channel information and telephone channel information, the channel is judged to be unusable. The non-permitted channel can be reliably set in the wireless telephone, and each channel information can be set separately without being aware of the relationship between the system common channel information and the telephone-specific channel information, and the channel information can be easily set.

The channel information is not limited to storing both system common channel information and telephone channel information.
For example, only system common channel information that is commonly applied to all wireless telephones may be used as channel information. Thus, when there is a wide range of radio wave interference that affects each wireless telephone, new communication conditions can be set for each wireless telephone collectively.
Alternatively, only channel-specific channel information that is individually applied to each wireless telephone may be used as channel information. As a result, when radio wave interference in a relatively narrow range is scattered, new communication conditions can be flexibly set for each wireless telephone.

  Further, when the communication condition notification means 15C of the telephone control device 1 combines the system common channel information 14B and the channel-specific channel information 14C in the storage unit 14, it is determined whether the combined channel information matches the channel-specific channel information 14C. However, if they match, notification of new communication conditions may not be performed. For example, when a new unusable channel is added to the system common channel information, depending on the wireless telephone 4, the new unusable channel may already be set to unusable. Thus, when there is no change in existing communication conditions, useless communication condition setting operation can be omitted.

[Second Embodiment]
Next, a telephone system according to a second embodiment of the present invention will be described with reference to FIG. FIG. 7 is a block diagram showing a configuration of a radio telephone used in the telephone system according to the second embodiment of the present invention.

  In the first embodiment (see FIG. 1), when the telephone control device 1 is restarted, or when the system common channel information 14B and the telephone-specific channel information 14C are updated from a setting telephone or an external apparatus, The case where the new communication conditions are notified to the telephone 4 has been described. In the present embodiment, a case where new communication conditions are set only for the wireless telephone 4 when the telephone-specific channel information 14C is updated for any of the wireless telephones 4 will be described.

Compared with the first embodiment, the configuration of the telephone system according to the present embodiment is such that channel setting request means 25C is provided in the parent device control section 25 of the parent device 2, as shown in FIG. Yes. The channel setting request unit 25C has a function of requesting the telephone control device 1 to set whether or not the channel used for the wireless data communication of the wireless telephone 4 is usable.
The configuration of the telephone control device 1 and the other configuration of the wireless telephone 4 are the same as those in the first embodiment described above, and detailed description thereof is omitted here.

[Operation of Second Embodiment]
Next, the operation of the telephone system according to the second embodiment of the present invention will be described with reference to FIG. 8 described above. FIG. 8 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.
Here, a case will be described as an example in which a new communication condition is notified from the telephone control device 1 to the wireless telephone 4A in response to a setting request for an unusable channel from the wireless telephone 4A.

  When the channel setting request operation of the user is detected by the operation input unit 23, the base unit control unit 25 of the base unit 2 displays a predetermined setting screen request on the display unit 22 by the channel setting request unit 25C. A Bluetooth channel number to be disabled is accepted (step 200), and a setting request including this disabled channel number is notified from the transmission I / F unit 20 to the telephone control apparatus 1 via the extension transmission path 5 (step 201). ).

  At this time, the setting screen may be stored in advance in the storage unit 24 or may be acquired from the telephone control device 1. Further, when setting an unusable channel, the Bluetooth channel number may be directly selected. Alternatively, the wireless LAN channel number or ISM device may be selected on the setting screen. In this case, the wireless LAN channel number or ISM device may be converted to a Bluetooth channel number using a conversion formula or conversion table. This conversion may be processed by the channel setting request unit 25C or the channel setting unit 15B of the telephone control device 1.

When the control unit 15 of the telephone control device 1 receives a setting request from the wireless telephone 4A via the extension I / F unit 11, the channel setting unit 15B determines, based on the unavailable channel number included in the setting request, Of the channel-specific channel information 14C in the storage unit 14, the channel is set to be unusable (step 202).
Next, the control unit 15 of the telephone control device 1 reads and combines the system common channel information 14B and the telephone-specific channel information 14C from the storage unit 14 by the communication condition notifying unit 15C to generate a new communication condition (Step S1). 103).

  Thereafter, the communication condition notifying unit 15C notifies the wireless telephone 4A of a new communication condition of the wireless telephone 4A, for example, an unusable channel from the extension I / F unit 11 via the extension transmission path 5 (step 204).

When the base unit control unit 25 of the base unit 2 constituting the wireless telephone 4A receives the setting notification from the telephone control device 1 via the transmission I / F unit 20, it is included in the setting notification by the communication condition instruction unit 25B. An unusable channel for a new communication condition is designated to the wireless module 26 (step 205).
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.

  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, and the same unusable channels are recognized (step 206).

As described above, in the present embodiment, when the telephone-specific channel information 14C is updated for any of the wireless telephones 4, a new communication condition is set only for the wireless telephone 4; When radio interference in a narrow range is scattered, new communication conditions can be set flexibly for each wireless telephone.
In addition, since a new communication condition is generated by combining the system common channel information of the storage unit and the channel-specific channel information of the wireless telephone, a wide range of radio wave interference and a narrow range of radio wave interference coexist. However, new communication conditions can be set individually for any radio telephone.

  In the present embodiment, the case where a new communication condition is set for the wireless telephone 4A in response to a setting request from the wireless telephone 4A has been described as an example. Even when there is a communication condition setting request for the wireless telephone 4, new communication conditions can be individually set for the wireless telephone in the same manner as described above.

[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 embodiment, the communication condition notifying unit 15C of the telephone control device 1 is used to combine the system common channel information 14B and the channel-specific channel information 14C in the storage unit 14. However, It is not limited to the communication condition notifying means 15C of the telephone control device 1, and may be synthesized on the radio telephone 4 side.

  That is, the communication condition notification means 15C of the telephone control device 1 separately notifies the wireless telephone 4 of the system common channel information 14B and the telephone-specific channel information 14C in the storage unit 14, and the communication condition instruction means 25B of the base unit 2 The channel table 28A may be updated by combining the system common channel information 14B and the telephone-specific channel information 14C to generate a new communication condition. As a result, it is possible to distribute the channel information combining processing burden in the communication condition notifying means 15C of the telephone control device 1 to each wireless telephone.

  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 a structural example of system common channel information. It is an example of a structure of the channel information according to telephone. 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 an example of generation of communication conditions. It is a block diagram which shows the structure of the telephone system concerning the 2nd 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 ... System common channel information, 14C ... Channel information by telephone 15 ... control unit, 15A ... call control unit, 15B ... channel setting unit, 15C ... communication condition notification unit, 2 ... master unit, 20 ... transmission I / F unit, 21 ... voice processing unit, 22 ... display unit, 23 ... operation input unit, 24 ... storage unit, 25 ... master unit control unit, 25A ... call control unit, 25B ... communication condition instruction unit, 25C ... channel setting request unit, 26 ... radio module, 27 ... radio transmission / reception unit, 28 ... Module storage unit, 28A ... channel table, 29 ... module control unit, 29A ... communication control means, 3 ... slave unit, 31 ... audio processing unit, 32 ... display unit, 33 ... operation input unit, 34 ... storage unit, 35 ... Child Control unit, 36 ... radio module, 4, 4A, 4B, 4C ... radiotelephone, 5 ... extension transmission line, 6 ... radio line, 9 ... communication line.

Claims (7)

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 device stores channel information indicating availability of each channel used for radio data communication in the radio telephone, and a new communication condition generated from the channel information in the memory to the radio telephone. A telephone system comprising a communication condition notification means for notification. The telephone system according to claim 1, wherein
The channel information comprises system common channel information that is commonly applied to all the wireless telephones, and telephone-specific channel information that is individually applied to each of the wireless telephones,
When the communication condition notifying unit generates a new communication condition to be notified to any of the wireless telephones, the communication condition notifying unit combines the system common channel information in the storage unit and the channel-specific channel information of the wireless telephone to create a new communication condition. A telephone system characterized by generating. The telephone system according to claim 2, wherein
The communication condition notifying means uses the channel when the communication condition is generated when any channel is set to be unusable in at least one of the system common channel information and the telephone channel information. A telephone system characterized by being judged as impossible. The telephone system according to claim 1, wherein
The telephone system is characterized in that the channel information includes system common channel information that is commonly applied to all the wireless telephones. The telephone system according to claim 1, wherein
The telephone system is characterized in that the channel information includes telephone-specific channel information applied individually for each wireless telephone. 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,
A storage unit for storing channel information indicating availability of each channel used for wireless data communication in the wireless telephone;
Communication condition notifying means for notifying the radio telephone of a communication condition generated from channel information in the storage unit. 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,
Storing channel information indicating availability of each channel used for wireless data communication in the wireless telephone in a storage unit;
A communication condition notification step of notifying the wireless telephone of a communication condition generated from the channel information in the storage unit.

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