JP2006108862A - Wireless telephone system, wireless repeater and wireless terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a wireless telephone system in which a wireless terminal carries out good telephone conversation. <P>SOLUTION: A wireless LAN-AP2 transmits a beacon signal to the wireless communication area of its own apparatus, and relays a wireless IP telephone 4 and an IP-PBX1 by providing communication with the wireless IP telephone 4 by wireless LAN. A short distance wireless-AP3 transmits a beacon signal to the wireless communication area of its own apparatus, and relays the wireless IP telephone 4 and the IP-PBX1 by providing communication with the wireless IP telephone 4 through short distance wireless communication of lower power consumption than wireless LAN. The wireless IP telephone 4 provides communication with the short distance wireless-AP3 by using short distance wireless communication when it is receiving beacon signals from both the wireless LAN-AP2 and the short distance wireless-AP3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to wireless telephone technology.

  Patent Document 1 discloses a technique for performing power line carrier communication by attaching a mobile phone to a charger. According to this technology, data stored in a mobile phone can be transmitted to, for example, a computer while the mobile phone is being charged.

JP 2000-91957 A

  In general, a wireless LAN consumes more power than a short-range wireless communication such as Bluetooth (registered trademark), and thus the battery life of the wireless LAN terminal is short. Further, there may be a case where a radio signal from a wireless AP (Access Point) of the wireless LAN cannot be satisfactorily received due to a shield or the like. Therefore, when a wireless telephone system is constructed using only a wireless LAN, a good call may not be made depending on the situation.

  In addition, said patent document 1 assumes using power line carrier communication for communication of the data etc. which were memorize | stored in the mobile telephone. In the above-mentioned Patent Document 1, when using power line carrier communication for a call, the mobile phone must be set in a charger and set in a so-called hands-free mode.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to enable a wireless terminal to make a good call in a wireless telephone system.

  In order to solve the above-described problems, the present invention enables a wireless terminal to be connected to a main apparatus using a wired network and a first wireless communication method, and uses a power line carrier communication and a second wireless communication method. Even so, it can be connected to the main unit. Then, the second wireless communication method uses a device that consumes less power than the first wireless communication method.

For example, the wireless telephone system of the present invention
A wireless terminal,
A first wireless repeater connected to a wired network;
A second wireless repeater connected to the power line;
A main unit connected to the first wireless repeater via the wired network and connected to the second wireless repeater by power line carrier communication using the power line;
The first wireless repeater is:
First transmitting means for transmitting a confirmation signal of the wireless terminal to the wireless communication area of the own device;
A first relay unit that communicates with the wireless terminal by a first wireless communication method and relays between the wireless terminal and the main device;
The second wireless repeater is
Second transmission means for transmitting a confirmation signal of the wireless terminal to the wireless communication area of the own device;
A second relay means for communicating with the wireless terminal and relaying between the wireless terminal and the main device by a second wireless communication method that consumes less power than the first wireless communication method. And
The wireless terminal is
Receiving means for receiving the confirmation signal;
Of the first wireless communication method and the second wireless communication method, a wireless method adopted by a transmission source of the confirmation signal received by the receiving unit is selected, and the transmission source is selected using the selected wireless communication method. Wireless communication means for performing communication.

  Here, when the wireless communication means receives the confirmation signal from both the first wireless repeater and the second wireless repeater, the second wireless communication method uses the second wireless communication method. You may communicate with a radio repeater.

  The wireless terminal may further include a battery remaining amount detecting unit that detects a remaining battery amount. When the wireless communication means receives confirmation signals from both the first wireless repeater and the second wireless repeater, the battery remaining amount detected by the battery remaining amount detecting means is a predetermined value. If less than, the second wireless communication system is used to communicate with the second wireless relay, and if not less than the predetermined value, the first wireless communication system is used to communicate with the first wireless relay. Communication may be performed.

  The wireless terminal may further include reception level detection means for detecting the reception level of the confirmation signal of the first wireless repeater. When the wireless communication means receives a confirmation signal from both the first wireless repeater and the second wireless repeater, if the reception level detected by the reception level detection means is less than a predetermined value For example, if the second wireless communication method is used to communicate with the second wireless repeater, and if it is not less than the predetermined value, the first wireless communication method is used to communicate with the first wireless repeater. You may make it perform.

  According to the present invention, in a state where the wireless terminal can use both the first wireless communication system and the second wireless communication system, when the remaining battery level of the wireless terminal is low, or the received signal of the first wireless communication system When a good call cannot be expected with the first wireless communication method, such as when the level is low, communication can be performed using the second wireless communication method. Therefore, the wireless terminal can make a good call at a longer time or at more points as compared with the case where only the first wireless communication method is used.

  Hereinafter, embodiments of the present invention will be described.

  FIG. 1 is a schematic diagram of a wireless IP telephone system to which an embodiment of the present invention is applied.

  As shown in the figure, the wireless IP telephone system of the present embodiment includes at least one wireless IP telephone 4, at least one wireless LAN-AP 2 connected to the wired LAN 5, and at least one short distance connected to the power line 6. An IP-PBX (Private Branch Exchange) 1 connected to the wireless-AP 3 and the wireless LAN-AP 2 via the wired LAN 5 and connected to the short-range wireless-AP 3 by power line carrier communication using the power line 6. Have.

  FIG. 2 is a schematic diagram of the IP-PBX 1. As shown in the figure, the IP-PBX 1 supplies power to the wired LAN-IF (interface) unit 11, the power line carrier IF unit 12, the IP switch unit 13, the main control unit 14, and each unit of the IP-PBX 1. And a power supply unit 15.

  The wired LAN-IF unit 11 is an interface for communicating with the wireless LAN-AP 2 via the wired LAN 5. The IP packet transmitted from the wireless LAN-AP 2 via the wired LAN 5 is transmitted to the IP-switch unit 13. The IP packet sent from the IP-switch unit 13 is transmitted to the wireless LAN-AP 2 via the wired LAN 5.

  The power line carrier IF unit 12 is an interface for communicating with the short-range wireless-AP 3 via power line carrier communication using the power line 6. The IP packet transmitted from the short-range wireless AP 3 is transmitted to the IP-switch unit 13 through the power line carrier communication using the power line 6. In addition, the IP packet sent from the IP-switch unit 13 is transmitted to the short-range radio-AP 3 via the power line carrier communication using the power line 6. The power line carrier IF unit 12 includes a coupling circuit 122 for connecting to the power line 6, and a power line carrier modem 121 that transmits and receives the power line 6 and a signal modulated for power line conveyance via the coupling circuit 122. The coupling circuit 122 passes only a signal in a band used for power line carrier, and does not pass power. For modulation in the power line carrier modem 121, OFDM (Orthogonal Frequency Division Multiplexing), FH-MMFSK (Frequency Hopping-M-ary Multilevel FSK), DS-SS (Direct Sequence Spectrum Spread), or the like is used.

  The IP switch unit 13 sends an IP packet sent from the wired LAN-IF unit 11 and the power line carrier IF unit 12 to either the wired LAN-IF unit 11 or the power line carrier IF unit 12 in accordance with an instruction from the main control unit 14. Output to.

  The main control unit 14 controls each unit of the IP-PBX 1. Specifically, a call control process is executed to establish an IP telephone communication path between the wireless IP telephones 4. Then, the IP switch unit 13 is controlled (switching) so that IP packets are transmitted and received between the wireless IP telephones 4 through the established communication path.

  FIG. 3 is a schematic diagram of the wireless LAN-AP 2. As illustrated, the wireless LAN-AP 2 includes a wireless LAN-IF unit 21, a wired LAN-IF unit 22, a beacon output unit 23, and an antenna 24.

  The wireless LAN-IF unit 21 is an interface for performing communication with the wireless IP telephone 4 via a wireless LAN (for example, IEEE 802.11a). The IP packet transmitted from the wireless IP telephone 4 via the wireless LAN is transmitted to the wired LAN-IF unit 22. The IP packet sent from the wired LAN-IF unit 22 is transmitted to the wireless IP telephone 4 via the wireless LAN.

  The wired LAN-IF unit 22 is an interface for communicating with the IP-PBX 1 via the wired LAN 5. The IP packet transmitted from the IP-PBX 1 via the wired LAN 5 is transmitted to the wireless LAN-IF unit 21. Further, the IP packet transmitted from the wireless LAN-IF unit 21 is transmitted to the IP-PBX 1 via the wired LAN 5.

  The beacon output unit 23 outputs a beacon signal having a transmission level necessary to reach the wireless LAN communication area of its own device. The antenna 24 is used for the wireless LAN-IF unit 21 to transmit and receive wireless LAN signals. Further, the beacon output unit 23 is used for transmitting a beacon signal.

  FIG. 4 is a schematic diagram of the short-range wireless-AP 3. As shown in the figure, the short-range wireless-AP 3 can be mounted with the short-range wireless IF unit 31, the power line carrier IF unit 32, the beacon output unit 33, the antenna 34, the charging unit 35, and the wireless IP telephone 4. And a mounting portion 36 configured.

  The short-range wireless IF unit 31 is an interface for communicating with the wireless IP telephone 4 via short-range wireless communication (for example, Bluetooth (registered trademark)) that consumes less power than the wireless LAN. The IP packet transmitted from the wireless IP telephone 4 by short-range wireless communication is transmitted to the power line carrier IF unit 32. Also, the IP packet transmitted from the power line carrier IF unit 32 is transmitted to the wireless IP telephone 4 by short-range wireless communication.

  The power line carrier IF unit 32 is an interface for communicating with the IP-PBX 1 via power line carrier communication using the power line 6. The IP packet transmitted from the IP-PBX 1 is transmitted to the short-range wireless IF unit 31 through the power line carrier communication using the power line 6. In addition, the IP packet transmitted from the short-range wireless IF unit 31 is transmitted to the IP-PBX 1 via the power line carrier communication using the power line 6. The power line carrier IF unit 32 includes a coupling circuit 322 for connecting to the power line 6, and a power line carrier modem 321 that transmits and receives the power line 6 and a signal modulated for power line conveyance via the coupling circuit 322. The coupling circuit 322 passes only a signal in a band used for power line carrier, and does not pass power. For modulation by the power line carrier modem 321, OFDM, FH-MMFSK, DS-SS, or the like is used.

  The beacon output unit 33 outputs a beacon signal having a transmission level necessary for reaching the short-range wireless communication area of the own device. The antenna 34 is used for the short-range wireless IF unit 31 to transmit and receive a short-range wireless communication signal. Further, the beacon output unit 33 is used for transmitting a beacon signal. The charging unit 35 charges the wireless IP telephone 4 attached to the attachment unit 36.

  FIG. 5 is a schematic diagram of the wireless IP telephone 4. As shown in the figure, the wireless IP telephone 4 includes a wireless LAN-IF unit 41, a short-range wireless IF unit 42, a selection unit 43, a remaining battery level detection unit 45, a battery 46, a charging unit 47, a call A processing unit 48, a beacon receiving unit 49, antennas 411 and 421, a microphone 481, and a speaker 482 are included.

  The wireless LAN-IF unit 41 is an interface for communicating with the wireless LAN-AP 2 via a wireless LAN (for example, IEEE 802.11a). The IP packet transmitted from the wireless LAN-AP 2 is transmitted to the selection unit 43 via the wireless LAN. Also, the IP packet sent from the selection unit 43 is transmitted to the wireless LAN-AP 2 via the wireless LAN.

  The short-range wireless IF unit 42 is an interface for communicating with the short-range wireless-AP 3 via short-range wireless communication (for example, Bluetooth (registered trademark)) that consumes less power than the wireless LAN. The IP packet transmitted from the short-range wireless-AP 3 by the short-range wireless communication is transmitted to the selection unit 43. In addition, the IP packet transmitted from the selection unit 43 is transmitted to the short-range wireless-AP 3 by short-range wireless communication.

  The beacon receiving unit 49 receives beacon signals transmitted from the wireless LAN-AP2 and the short-range wireless-AP3. Also, the reception level of the beacon signal transmitted from the wireless LAN-AP 2 is detected. The antenna 411 is used for the wireless LAN-IF unit 41 to transmit and receive wireless LAN signals. Further, the beacon receiving unit 49 is used for receiving a beacon signal transmitted from the wireless LAN-AP 2. The antenna 421 is used for the short-range wireless IF unit 42 to transmit and receive a short-range wireless signal. In addition, the beacon receiving unit 49 is used for receiving a beacon signal transmitted from the short-range wireless-AP 3.

  The charging unit 47 charges the battery 46 by receiving power from the charging unit 35 of the short-range wireless-AP 3 by mounting the wireless IP telephone 4 on the mounting unit 36 of the short-range wireless-AP 3. The battery remaining amount detection unit 45 detects the remaining amount of the battery 46.

  The call processing unit 48 extracts a voice signal from the IP packet sent from the selection unit 43 and outputs it from the speaker 482. Further, the audio signal input to the microphone 481 is stored in an IP packet and output to the selection unit 43.

  The selection unit 43 then determines the wireless LAN-IF unit 41 and the short-range wireless IF unit 42 based on the reception state of the beacon signal in the beacon reception unit 49 and the status of the remaining battery level detected by the remaining battery level detection unit 45. Select one of these. Then, the selected IF unit is connected to the call processing unit 48.

  FIG. 6 is a diagram for explaining an operation flow of the selection unit 43 of the wireless IP telephone 4.

  The selection unit 43 obtains the reception status of the beacon signals of the wireless LAN-AP2 and the short-range wireless-AP3 from the beacon receiving unit 49 (S601). If the beacon receiving unit 49 has not received a beacon signal from either the wireless LAN-AP2 or the short-range wireless-AP3 (both NO in S602 and S603), the process returns to S601 and the beacon receiving unit 49 receives the wireless LAN- AP2 and short-range wireless-AP3 beacon signal reception status is newly acquired.

  When the beacon receiving unit 49 receives a beacon signal from only the short-range wireless AP3 (NO in S602, YES in S603), the selection unit 49 selects the short-range wireless IF unit 42 (S608).

  When the beacon receiving unit 49 receives a beacon signal from only the wireless LAN-AP 2 (YES in S602, NO in S604), the selection unit 49 selects the wireless LAN-IF unit 41 (S607).

  When the beacon receiving unit 49 receives beacon signals from both the wireless LAN-AP2 and the short-range wireless-AP3 (YES in S602, YES in S604), the selection unit 43 selects the IF units 41 and 42 to select. Is determined as follows. That is, the selection unit 43 obtains the remaining battery level detected by the remaining battery level detection unit 45. If the obtained battery remaining amount is less than the predetermined value (NO in S605), the wireless IP telephone 4 does not have a sufficient battery remaining amount for a call using the wireless LAN. Therefore, in this case, the selection unit 43 selects the short-range wireless IF unit 42 (S608).

  On the other hand, when the obtained remaining battery level is equal to or greater than the predetermined value (YES in S605), the reception level of the beacon signal of the wireless LAN-AP 2 received by the beacon receiving unit 46 is obtained. If the obtained reception level is less than the predetermined value (NO in S606), the wireless IP telephone 4 is not in a situation where it can receive a wireless LAN signal sufficient for a telephone call using the wireless LAN. Therefore, in this case, the selection unit 43 selects the short-range wireless IF unit 42 (S608).

  When the obtained battery remaining amount is equal to or greater than the predetermined value (YES in S605) and the obtained reception level is equal to or greater than the predetermined value (YES in S606), the selection unit 43 performs the wireless LAN-IF unit 41. Is selected (S607).

  Through the above processing, the selection unit 41 selects one of the wireless LAN-IF unit 41 and the short-range wireless IF unit 42 and connects to the call processing unit 48. Note that it is possible that the selection unit 41 switches the selection of the wireless LAN-IF unit 41 and the short-range wireless IF unit 42 during a call by the call processing unit 48. In this case, the wireless LAN-AP2 and the short-range wireless-AP3 of the communication partner can be switched without disconnecting the call using the existing roaming technology or handover technology.

  Next, the operation procedure (connection sequence) of the wireless IP telephone system shown in FIG. 1 will be described with reference to FIGS.

  FIG. 7 shows a connection sequence of the wireless IP telephone 4 when the wireless LAN-AP 2 exists near the wireless IP telephone 4 and the short-range wireless-AP 3 does not exist.

  Of the beacon signals transmitted by the wireless LAN-AP2 and the short-range wireless-AP3, only the wireless LAN-AP2 beacon signal is received by the wireless IP telephone 4 (S701, S702). In this case, the selection unit 43 of the wireless IP telephone 4 selects the wireless LAN-IF unit 41 (S703). In addition, when receiving the beacon signal from the wireless LAN-AP 2, the wireless LAN-IF unit 41 of the wireless IP telephone 4 transmits an affiliation request with an SSID (Service Set ID) to the wireless LAN-AP 2 (S 706).

  When the SSID assigned to the affiliation request received from the wireless IP telephone 4 matches the SSID of the own device, the wireless LAN-AP 2 transmits the affiliation success to the wireless IP telephone 4. Further, a wireless communication section using the wireless LAN is established with the wireless IP telephone 4 (S707).

  Now, in the wireless IP telephone 4, the wireless LAN-IF unit 41 transmits the successfully affiliated SSID to the IP-PBX 1 (S708). The IP-PBX 1 has an address management table (not shown) for managing the correspondence between the telephone number of the wireless IP telephone 4 and the IP address. The main control unit 14 of the IP-PBX 1 registers the notified SSID in the address management table in association with the IP address of the wireless IP telephone 4 that is the notification source (S709). This address management table is used to specify the location of the connection partner during call control. That is, the IP address of the wireless IP telephone 4 can be identified from the telephone number, and the AP to which the wireless IP telephone 4 belongs is identified from the identified IP address. With this process, the wireless IP telephone 4 can use the wireless IP telephone system via the nearest wireless LAN-AP 2.

  FIG. 8 shows a connection sequence of the wireless IP telephone 4 when the wireless LAN-AP 2 and the short-range wireless-AP 3 exist near the wireless IP telephone 4 and the battery of the wireless IP telephone 4 is low. Yes.

  A beacon signal transmitted from each of the wireless LAN-AP2 and the short-range wireless-AP3 is received by the wireless IP telephone 4 (S801, S802). In this case, the selection unit 43 of the wireless IP telephone 4 checks the remaining battery level detected by the remaining battery level detection unit 45, and selects the short-range wireless IF unit 42 if the remaining battery level is less than a predetermined value (S803). (S804). When the short-range radio IF unit 42 of the radio IP telephone 4 receives a beacon signal from the short-range radio-AP 3, the short-range radio-IF unit 42 transmits an affiliation request with an SSID to the short-range radio-AP 3 (S806).

  If the SSID assigned to the affiliation request received from the wireless IP telephone 4 matches the SSID of the own apparatus, the short-range wireless AP 3 transmits the affiliation success to the wireless IP telephone 4. Further, a wireless communication section by short-range wireless communication is established with the wireless IP telephone 4 (S807).

  Now, in the wireless IP telephone 4, the short-range wireless IF unit 42 transmits the successfully affiliated SSID to the IP-PBX 1 (S808). The main control unit 14 of the IP-PBX 1 associates the notified SSID with the IP address of the wireless IP telephone 4 that is the notification source, and manages the correspondence between the telephone number and the IP address of the wireless IP telephone 4 It is registered in a table (not shown) (S809). This address management table is used to specify the location of the connection partner during call control. That is, the IP address of the wireless IP telephone 4 can be identified from the telephone number, and the AP to which the wireless IP telephone 4 belongs is identified from the identified IP address. By this processing, the wireless IP telephone 4 can use the wireless IP telephone system via the short-range wireless-AP 3.

  FIG. 9 shows a case where the wireless LAN-AP2 and the short-range wireless-AP3 exist near the wireless IP telephone 4, and the wireless IP telephone 4 has a sufficient remaining battery capacity, but receives the wireless LAN-AP2 beacon signal. The connection sequence of the wireless IP telephone 4 when the level is low is shown.

  A beacon signal transmitted from each of the wireless LAN-AP2 and the short-range wireless-AP3 is received by the wireless IP telephone 4 (S901, S902). In this case, the selection unit 43 of the wireless IP telephone 4 checks the remaining battery level detected by the remaining battery level detection unit 45. If the remaining battery level is greater than or equal to a predetermined value (S903), the selection unit 43 further detects the remaining battery level. The reception level of the beacon signal of the wireless LAN-AP 2 is checked. If the reception level is less than the predetermined value (S904), the short-range wireless IF unit 42 is selected (S905). When the short-range radio-IF unit 42 of the radio IP telephone 4 receives a beacon signal from the short-range radio-AP 3, the short-range radio-IF unit 42 transmits an affiliation request with an SSID to the short-range radio-AP 3 (S906).

  If the SSID assigned to the affiliation request received from the wireless IP telephone 4 matches the SSID of the own apparatus, the short-range wireless AP 3 transmits the affiliation success to the wireless IP telephone 4. Further, a wireless communication section by short-range wireless communication is established with the wireless IP telephone 4 (S907).

  Now, in the wireless IP telephone 4, the short-range wireless IF unit 42 transmits the successfully affiliated SSID to the IP-PBX 1 (S908). The main control unit 14 of the IP-PBX 1 associates the notified SSID with the IP address of the wireless IP telephone 4 that is the notification source, and manages the correspondence between the telephone number and the IP address of the wireless IP telephone 4 It registers in a table (not shown) (S909). This address management table is used to specify the location of the connection partner during call control. That is, the IP address of the wireless IP telephone 4 can be identified from the telephone number, and the AP to which the wireless IP telephone 4 belongs is identified from the identified IP address. By this processing, the wireless IP telephone 4 can use the wireless IP telephone system via the short-range wireless-AP 3.

  The embodiment of the present invention has been described above.

  According to the present embodiment, when the wireless IP telephone 4 can use both wireless LAN and short-range wireless communication, the battery of the wireless IP telephone 4 is low, or the reception signal level of the wireless LAN is low. When a good call cannot be expected in a wireless LAN, communication can be performed using short-range wireless communication. Therefore, the wireless IP telephone 4 can make a good call at a longer time or at more points as compared with the case where only the wireless LAN is used.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist.

  For example, in the above embodiment, when the wireless IP telephone 4 is in a state where both the wireless LAN and the short-range wireless communication can be used, the investigation is performed in the order of the remaining battery level of the wireless IP telephone 4 and the received signal level of the wireless LAN. Is going. However, the present invention is not limited to this. Further, it is not necessary to investigate both the remaining battery level of the wireless IP telephone 4 and the received signal level of the wireless LAN, and only one of them may be investigated. Alternatively, neither may be investigated. If neither is investigated, short-range wireless communication may be forcibly used when the wireless IP telephone 4 is in a state where both wireless LAN and short-range wireless communication can be used.

  In the above embodiment, a beacon signal is used as a signal (a wireless terminal confirmation signal) for notifying the wireless communication area of the AP to the wireless terminal (wireless IP telephone 4). It is not limited. Further, instead of the wired LAN 5, other wired networks may be used. Furthermore, instead of the wireless LAN, a wireless network using another long-distance wireless communication method may be used.

  In the above-described embodiment, the case where the wireless LAN and the short-range wireless communication are used has been described as an example. However, the first wireless communication method and the second wireless communication that consumes less power than the first wireless communication method. The present invention can be widely applied to those that can use both methods.

FIG. 1 is a schematic diagram of a wireless IP telephone system to which an embodiment of the present invention is applied. FIG. 2 is a schematic diagram of the IP-PBX 1. FIG. 3 is a schematic diagram of the wireless LAN-AP 2. FIG. 4 is a schematic diagram of the short-range wireless-AP 3. FIG. 5 is a schematic diagram of the wireless IP telephone 4. FIG. 6 is an explanatory diagram of an operation flow of the selection unit 43 of the wireless IP telephone 4. FIG. 7 is a diagram showing a connection sequence of the wireless IP telephone 4 when the wireless LAN-AP 2 exists near the wireless IP telephone 4 and the short-range wireless-AP 3 does not exist. FIG. 8 is a diagram showing a connection sequence of the wireless IP telephone 4 when the wireless LAN-AP 2 and the short-range wireless-AP 3 exist near the wireless IP telephone 4 and the battery of the wireless IP telephone 4 is low. It is. FIG. 9 shows a case where the wireless LAN-AP2 and the short-range wireless-AP3 exist near the wireless IP telephone 4, and the wireless IP telephone 4 has a sufficient remaining battery capacity, but receives the wireless LAN-AP2 beacon signal. It is a figure which shows the connection sequence of the radio | wireless IP telephone 4 in case a level is low.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... IP-PBX, 2 ... Wireless LAN-AP, 3 ... Short range wireless-AP, 4 ... Wireless IP telephone, 5 ... Wired LAN, 6 ... Power line, 11 ... Wired LAN-IF part, 12 ... Power line carrier IF part DESCRIPTION OF SYMBOLS 13 ... IP switch part 14 ... Main control part 15 ... Power supply part 121 ... Power line carrier modem 122 ... Coupling circuit 21 ... Wireless LAN-IF part 22 ... Wired LAN-IF part 23 ... Beacon output part 31 ... Short-range wireless IF unit, 32 ... Power line carrier IF unit, 321 ... Power ship carrier modem, 322 ... Coupling circuit, 33 ... Beacon output unit, 35 ... Charging unit, 36 ... Mounting unit, 41 ... Wireless LAN-IF , 42 ... Short-range wireless IF unit, 43 ... Selection unit, 45 ... Battery remaining amount detection unit, 46 ... Battery, 47 ... Charging unit, 48 ... Call processing unit, 481 ... Microphone, 482 ... Speaker

Claims (8)

A wireless telephone system,
A wireless terminal,
A first wireless repeater connected to a wired network;
A second wireless repeater connected to the power line;
A main apparatus connected to the first wireless repeater via the wired network and connected to the second wireless repeater by power line carrier communication using the power line;
The first wireless repeater is:
First transmitting means for transmitting a confirmation signal of the wireless terminal to the wireless communication area of the own device;
A first relay unit that communicates with the wireless terminal by a first wireless communication method and relays between the wireless terminal and the main device;
The second wireless repeater is
Second transmission means for transmitting a confirmation signal of the wireless terminal to the wireless communication area of the own device;
A second relay means for communicating with the wireless terminal and relaying between the wireless terminal and the main device by a second wireless communication method that consumes less power than the first wireless communication method. And
The wireless terminal is
Receiving means for receiving the confirmation signal;
Of the first wireless communication method and the second wireless communication method, a wireless method adopted by a transmission source of the confirmation signal received by the receiving unit is selected, and the transmission source is selected using the selected wireless communication method. And a wireless communication means for performing communication. The wireless telephone system according to claim 1,
The wireless communication means includes
When a confirmation signal is received from both the first wireless repeater and the second wireless repeater, communication is performed with the second wireless repeater using the second wireless communication method. A featured radio telephone system. The wireless telephone system according to claim 1,
The wireless terminal is
A battery remaining amount detecting means for detecting the remaining battery amount;
The non-communication means is
In the case where confirmation signals are received from both the first wireless repeater and the second wireless repeater, the second wireless communication is performed if the battery remaining amount detected by the battery remaining amount detecting means is less than a predetermined value. Communicating with the second wireless repeater using a communication method, and if not less than the predetermined value, communicating with the first wireless repeater using the first wireless communication method. Wireless phone system. The wireless telephone system according to claim 1,
The wireless terminal is
A reception level detecting means for detecting the reception level of the confirmation signal of the first wireless repeater;
The non-communication means is
When the confirmation signal is received from both the first wireless repeater and the second wireless repeater, if the reception level detected by the reception level detection means is less than a predetermined value, the second wireless communication system A wireless telephone that communicates with the first wireless repeater using the first wireless communication method if it is not less than the predetermined value. system. The wireless telephone system according to any one of claims 1 to 4, wherein
The first wireless communication method is a long-range wireless communication method,
The wireless telephone system, wherein the second wireless communication system is a short-range wireless communication system. A power line carrying means for carrying a power line using a power line;
Wireless communication means for performing wireless communication with a wireless terminal;
A signal received from the wireless terminal via the wireless communication unit is transmitted to the power line using the power line carrier unit, and a signal received from the power line by the power line carrier unit is transmitted to the wireless line via the wireless communication unit. Relay means for transmitting to the terminal;
And a transmitting means for transmitting a confirmation signal of the wireless terminal to the wireless communication area of the own device. The wireless repeater according to claim 6, wherein
A mounting portion for mounting the wireless terminal;
The wireless repeater further comprising charging means for charging the wireless terminal attached to the attachment part. First wireless communication means for communicating with the first wireless repeater by the first wireless communication method;
A second wireless communication means for communicating with a second wireless repeater by a second wireless communication method that consumes less power than the first wireless communication method;
Receiving means for receiving a confirmation signal of the wireless terminal;
Of the first wireless communication means and the second wireless communication means, a wireless communication means that communicates with a transmission source of the confirmation signal received by the reception means is selected, and the transmission is performed using the selected wireless communication means. And a communication control means for communicating with the source.

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