JP2002125069A - Ip telephone system, radio ip telephone and radio lan base station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a limit of a roaming function in response to various type conditions is difficult for a radio IP telephone. SOLUTION: A telephone number managing server 3 (13) and a radio LAN base stations 1a, 1b (11) manage extension numbers, terminal IDs, IP addresses, user IDs, passwords and the like of radio IP telephones 41a, 41b, 41c, (41d) belonging to own sub-net 21 (22). When the radio IP telephones 41a, 41b, 41c (41d) move between the sub-nets 21 and 22, it is certified based on the user's ID and password. When roaming is previously allowed in its sub-net, the roaming is allowed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an IP telephone system in which a wireless IP telephone relays a call to another IP telephone on an IP network by relaying a wireless LAN base station, and a wireless communication in the IP telephone system. The present invention relates to an IP telephone and a wireless LAN base station.

[0002]

2. Description of the Related Art Conventional techniques related to voice transmission in an IP (Internet Protocol) network such as the Internet and an intranet include ITU-T.
Recommendation H. There are communication systems such as the H.323 system.

FIG. Conventional I based on H.323 system
It is a figure showing the example of composition of a P telephone system. 5 in the figure
01a and 501b correspond to H.264. An IP telephone 502 performs a telephone call according to the H.323 system.
Wired LAN (Local Area)
a Network), and 503 is the IP telephone 50
Reference numeral 504 denotes an IP telephone gatekeeper for performing authentication and address conversion of 1a and 501b, and 504 is a PSTN / ISDN network 50.
5 to enable communication between the IP telephones 501a and 501b and the IP telephones connected to the other IP networks via the IP network and the PSTN / ISDN network. The IP phone gateway to perform. 505 is the PSTN (Pu
brickSwitched Telephone Ne
work) / ISDN (Integrated Se)
r. Digital Digital Network).

Next, the operation will be described. IP telephone 5
01a and 501b correspond to H.264. The audio signal is converted into audio data according to the audio encoding method defined in H.323, and the audio data is transmitted as an IP packet.

For example, if the IP telephone 501a is the IP telephone 5
When a telephone call is made with 01b, IP telephone 501a first makes a subscription request to IP telephone gatekeeper 503. Next, when the IP telephone gatekeeper 503 confirms the subscription, the call setting is performed for the IP telephone 501b. Then, after receiving the call setting, IP telephone 501b issues a subscription request to IP telephone gatekeeper 503. When the IP telephone gatekeeper 503 confirms the subscription, the IP telephone 501b sequentially calls and answers the IP telephone 501a. And I
After confirming the type and encoding method of information that can be exchanged between the P telephone 501a and the IP telephone 501b, data communication is started and a telephone call is performed.

[0006] IP telephone 501a is PSTN / ISDN.
Similarly, when a telephone call is made with an IP telephone of another network via the network 505, the IP telephone 501a
Executes a subscription request / confirmation with the IP telephone gatekeeper 503, and the IP telephone gatekeeper 503 transmits
Search for the telephone gateway, and check the IP telephone gateway 50
4, the IP telephone 501a sets up a call to an IP telephone in another IP network, executes a request to confirm the IP telephone to join with an IP telephone gatekeeper in another IP network, and confirms the IP telephone. IP phone is IP
A call to the IP telephone 501a and a response are sequentially executed via the telephone gateway 504. At this time, the IP telephone gateway 504 executes protocol conversion between the PSTN / ISDN network 505 and the IP network. And I
After confirming the type of information that can be exchanged between the P telephone 501a and an IP telephone of another IP network and the encoding method, data communication is started and a telephone call is performed.

As described above, in the conventional IP telephone system, a telephone call is executed by the IP telephones 501a and 501b via the IP network including the wired LAN 502 and the like.

On the other hand, conventional techniques relating to data transmission using a wireless LAN include JP-A-8-65303, JP-A-8-65304, and JP-A-8-653.
Japanese Unexamined Patent Application Publication No. 05, JP-A-8-65306 and the like. In this conventional technique, an internetworking node (access point) relays messages exchanged between mobile wireless nodes or between a wired LAN and a wireless LAN to all registered mobile wireless nodes. At this time, since each wireless node is registered to a predetermined one access point, other access points to which the wireless node is not registered do not perform a relay operation, and message duplication in the wired LAN is prevented.

Each wireless node determines to which access point it is registered, and each wireless node determines whether a message can be directly transmitted to a destination node. Ask the access point to deliver the message. Each access point monitors data traffic on the wired LAN, and transfers a data packet addressed to the registered wireless node to the wireless node.

[0010] Each access point periodically
A wireless signal for identifying a network address is broadcast to the wireless nodes, and each wireless node maintains an address table of all access points newly received in the broadcast. In addition, each wireless node monitors the traffic of the wireless node, maintains the topology of the wireless node, and each access point maintains and manages a wireless LAN topology table surrounding itself, and exists in its own communicable area. The wireless node to perform.

[0011]

Since the conventional IP telephone system is configured as described above, the wireless IP telephone moves to the area of another wireless LAN base station, and the destination wireless LAN base station moves. Communication, that is, it is difficult to realize a roaming function.

Further, when the number of wireless IP telephones increases and the movement of the wireless IP telephones occurs frequently, there is a problem that the load on the IP telephone gatekeeper for performing authentication and address conversion increases.

Further, there is a problem that it is necessary to connect a wireless LAN base station to a wired LAN and execute terminal identification in a wireless communication section when the wireless LAN base station is applied to a wireless LAN IP network using a wireless IP telephone. .

Further, in the above-described conventional system related to data transmission using the wireless LAN, the network address of all wireless nodes including the access point which is determined to be communicable by the received broadcast signal is recognized by the wireless node. Therefore, there has been a problem that it is difficult to divide the IP network into several subnets and to set roaming availability for each subnet.

Furthermore, in the IP network, when data and voice packets coexist, they are processed without distinction. Therefore, if the data communication volume increases due to file transfer or the like, voice packets requiring real-time performance are lost and voice quality is reduced. There were problems such as the possibility of deterioration.

[0016] The present invention has been made to solve the above-described problems, and requires the use of a wireless IP telephone before use.
Wireless LAN based on terminal ID unique to each wireless IP phone
An IP telephone system in which a telephone number management server executes authentication through a base station to identify each wireless IP telephone and permit roaming only to a previously registered wireless IP telephone. An object is to obtain an IP telephone and a wireless LAN base station.

Another object of the present invention is to provide an IP telephone system in which a telephone number management server is provided for each subnet so that loads such as authentication can be distributed.

Further, according to the present invention, each wireless IP telephone belongs to any one of the subnets, and whether or not roaming is possible is set for each subnet in a telephone number management server of the subnet to which the wireless IP telephone belongs, and A telephone number management server of the wireless IP telephone inquires of a telephone number management server of a subnet to which the wireless IP telephone belongs to determine whether or not roaming is possible, thereby obtaining an IP telephone system capable of setting whether or not roaming is possible for each subnet. And

Further, according to the present invention, the wireless LAN base station checks the type of the IP packet, and preferentially transmits the IP packet of the voice data to the wireless IP telephone, so that the IP can maintain a good communication state. It aims to obtain a telephone system and a wireless LAN base station.

[0020]

An IP telephone system according to the present invention has a unique terminal ID, transmits a terminal ID at the start of use, transmits and receives voice data as an IP packet via a wireless LAN after authentication. Transmitting and receiving a terminal ID and voice data between one or a plurality of wireless IP telephones performing a telephone call and a wireless IP telephone via a wireless LAN, and requesting authentication of the wireless IP telephone based on the terminal ID 1 Alternatively, the terminal ID and the telephone number of one or more wireless IP telephones and one or more wireless IP telephones are registered in advance, and the wireless IP telephone is authenticated based on the terminal ID from the wireless IP telephone at the start of use of the wireless IP telephone. And a telephone number management server.

[0021] The IP telephone system according to the present invention, when detecting that the wireless IP telephone has moved to the access point zone of the wireless LAN base station based on a predetermined wireless signal from one of the wireless LAN base stations. In this case, the terminal ID is transmitted.

[0022] In the IP telephone system according to the present invention, the wireless IP telephone has a first wireless transmission / reception unit for performing a telephone call via a public mobile communication network and a second wireless communication unit for performing a telephone call via a wireless LAN. And having moved to the access point zone of the wireless LAN base station based on a predetermined wireless signal from any one of the wireless LAN base stations when the first wireless transmitting / receiving section is operating. Is detected, the operation of the first wireless transmission / reception unit is stopped, and the operation of the second wireless transmission / reception unit is started.

An IP telephone system according to the present invention includes one or more wireless LAN base stations and a telephone number management server for each subnet, and the telephone number management server performs roaming of a wireless IP telephone belonging to its own subnet. Wireless I / O having information on the availability and belonging to another subnet
When the P telephone moves to its own subnet, the P telephone inquires of the telephone number management server of the subnet to which the wireless IP telephone belongs whether or not roaming is possible. This is to allow calls.

[0024] In the IP telephone system according to the present invention, the telephone number management server registers in advance a wireless IP telephone to which roaming is permitted, and permits only the roaming of the registered wireless IP telephone. .

In the IP telephone system according to the present invention, the telephone number management server permits roaming of the wireless IP telephone only in a predetermined wireless LAN base station or a predetermined subnet.

In the IP telephone system according to the present invention, the telephone number management server sets roaming enable / disable of each wireless IP telephone belonging to its own subnet to one of a plurality of levels, and performs wireless communication according to the set level. In this embodiment, conditions for permitting roaming of an IP telephone are changed.

[0027] An IP telephone system according to the present invention includes a relay device for transmitting and receiving IP packets between subnets, and a relay device that is in a failure state or a congestion state.
And an emergency relay device for transmitting and receiving IP packets between subnets.

[0028] In the IP telephone system according to the present invention, the wireless IP telephone can acquire data of another service in the subnet by an IP packet, and the wireless LAN base station gives priority to the voice data IP packet over the other IP packets. Is transmitted to the wireless IP telephone.

In the IP telephone system according to the present invention, the wireless LAN base station refers to the header of the IP packet, detects the upper protocol of the IP packet, and determines the type of data based on the type of the upper protocol. It is like that.

In the IP telephone system according to the present invention, the wireless LAN base station detects an IP packet of voice data, and calculates a charge corresponding to the traffic of voice data for each wireless IP telephone.

[0031] The IP telephone system according to the present invention is provided with a billing server that counts bills calculated by one or more wireless LAN base stations.

In the IP telephone system according to the present invention, the wireless LAN base station detects an IP packet of voice data,
The accounting according to the communication volume of voice data is calculated for each wireless IP telephone, and the accounting of the wireless IP telephone during roaming is transmitted to the subnet to which the wireless IP telephone belongs.

[0033] The IP telephone system according to the present invention includes a charging server for counting the charges calculated by one or more wireless LAN base stations, and the wireless LAN base station performs charging of the wireless IP telephone when roaming. This is transmitted to the accounting server of the subnet to which the telephone belongs.

[0034] In the IP telephone system according to the present invention, the wireless LAN base station charges each call based on the total traffic volume at the call start time, the total traffic volume at the call end time, and the traffic volume by the call. This is to calculate the rate.

In the IP telephone system according to the present invention, the wireless IP telephone detects an IP packet of voice data and calculates a charge according to the traffic volume of the voice data.

[0036] The IP telephone system according to the present invention is provided with a charging server for counting charges calculated by one or more wireless IP telephones.

The wireless IP telephone according to the present invention has a unique terminal ID, transmits the terminal ID at the start of use, and after authentication, transmits and receives voice data as an IP packet via the wireless LAN to execute a call. It is like that.

The wireless IP telephone according to the present invention, when detecting that it has moved to the access point zone of the wireless LAN base station based on a predetermined wireless signal from one of the wireless LAN base stations, changes the terminal ID. It is intended to be transmitted.

[0039] A wireless IP telephone according to the present invention includes a first wireless transmitting / receiving section for performing a telephone call via a public mobile communication network, and a second wireless transmitting / receiving section for performing a telephone call via a wireless LAN. When operating the first wireless transmission / reception unit and detecting that the mobile station has moved to the access point zone of the wireless LAN base station based on a predetermined wireless signal from one of the wireless LAN base stations, The operation of the first wireless transceiver is stopped and the operation of the second wireless transceiver is started.

The wireless IP telephone according to the present invention detects an IP packet of voice data and calculates a charge according to the traffic of the voice data.

The wireless LAN base station according to the present invention transmits / receives the terminal ID and voice data of the wireless IP telephone to / from the wireless IP telephone via the wireless LAN, and requests authentication of the wireless IP telephone based on the terminal ID. It is something to do.

The wireless LAN base station according to the present invention detects an IP packet of voice data and calculates a charge according to the traffic of voice data for each wireless IP telephone.

The wireless LAN base station according to the present invention has an IP
The upper protocol of the IP packet is detected by referring to the header of the packet, the type of the IP packet is determined based on the type of the upper protocol, and the IP packet of the audio data is detected.

The wireless LAN base station according to the present invention detects an IP packet of voice data, calculates a charge corresponding to the traffic volume of the voice data for each wireless IP telephone, and charges the wireless IP telephone during roaming. The transmission is made to the subnet to which the wireless IP telephone belongs.

The wireless LAN base station according to the present invention calculates the charging rate for each call based on the total traffic volume at the call start time, the total traffic volume at the call end time, and the traffic volume due to the call. It was made.

[0046]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a circuit diagram of an I-type semiconductor device according to a first embodiment of the present invention.
FIG. 2 is a block diagram showing a configuration example of a wireless LAN base station in FIG. 1, and FIG. 3 is a block diagram showing a configuration example of a wireless IP telephone in FIG. .

In FIG. 1, reference numerals 1a and 1b denote one or a plurality of wireless IPs existing in own access point zones (AP zones) 51a and 51b in the subnet 21.
A wireless LAN base station that is connected to the telephones 41a, 41b, and 41c via the wireless LAN and is connected to the wired LAN 2 and holds the extension numbers of the wireless IP telephones 41a, 41b, and 41c and control information for each extension number. Yes, 1
1 is its own AP zone 51c in the subnet 22
A wireless LAN base station connected to one or a plurality of wireless IP telephones 41d existing through the wireless LAN and connected to the wired LAN 12, and holding an extension number of the wireless IP telephone 41d and control information for each extension number It is.

A wired LA 2 connects one or more wireless LAN base stations 1a and 1b in the subnet 21.
N is a wired LAN that connects one or more wireless LAN base stations 11 in the subnet 22 and the like.

3 is a wired LAN 2 in the subnet 21
, Manages the user IDs and passwords of the wireless IP telephones 41a, 41b, 41c belonging to the subnet 21, and executes the wireless IP telephones 41a, 41a, 41b belonging to the subnet 21 executed via the wireless LAN base stations 1a, 1b.
The authentication of 41b and 41c is executed, and the
When the wireless IP telephones 41a, 41b, 41c belonging to the sub-network communicate with the IP telephones in the other subnets, the destinations are confirmed for the other subnets (for example, the subnet 22), and the wireless IP telephones belonging to the own subnet 21 are executed. When 41a, 41b and 41c execute a roaming request from another subnet, they perform extension number use stop processing in their own subnet 21 and when their wireless IP telephones 41a, 41b and 41c move to their own subnet 21. A telephone number management server 13 performs an extension number use start process.
N12 and wireless IP belonging to subnet 22
Manages the user ID and password of the telephone 41d,
Subnet 2 executed via wireless LAN base station 11
2 is authenticated, and when the wireless IP telephone 41d belonging to its own subnet 22 communicates with an IP telephone in another subnet, the destination is confirmed with respect to another subnet (for example, the subnet 21). Is executed, and the wireless IP belonging to the own subnet 22 is executed.
When the telephone 41d executes a roaming request from another subnet, it performs extension number use stop processing in its own subnet 22, and performs extension number use start processing when its wireless IP telephone 41d moves to its own subnet 22. It is a telephone number management server.

4 is a wired LAN 2 in the subnet 21
Is an IP telephone gateway for transmitting and receiving IP packets via the PSTN / ISDN network 31. The IP telephone gateway 14 is connected to the wired LAN 12 on the subnet 22 and executes transmission and reception of IP packets via the PSTN / ISDN network 31. IP gateway.

5 is a wired LAN 2 in the subnet 21
Is a web server that manages predetermined content on the WWW (World Wide Web).

Reference numeral 31 denotes a PSTN / ISDN network;
Is the wired LAN 2 and the subnet 2 in the subnet 21
2 is a router (relay device) for connecting to the wired LAN 12 in FIG.

Reference numerals 41a, 41b, 41c and 41d operate as portable telephones in a public mobile communication network where radio waves of the public mobile communication network reach, and wireless LANs where radio waves of the public mobile communication network do not reach. VoIP (Voi
This is a wireless IP telephone that executes a call by data communication based on ce Over IP).

The wireless LAN base stations 1a, 1b,
In 11, 101 is a central control unit that processes information from each unit and controls each unit, 102 is a memory that temporarily stores information used in processing by the central control unit 101, and 103 is various types of memory. A display unit 104 for displaying information; 104, a base station I specific to each wireless LAN base station;
This is a base station ID holding unit that holds D.

Reference numeral 105 denotes a wireless transmission / reception unit for transmitting / receiving data to / from another wireless IP telephone or a wireless LAN base station via a wireless LAN;
Reference numeral 107 denotes a wired LAN interface that transmits and receives data via the wireless LAN interface 2 and 12. The data from the wired LAN interface 106 is transmitted to the wireless transceiver 105, and the data from the wireless transceiver 105 is transmitted to the wired LAN interface 106. A wireless control unit for transmitting,
Reference numeral 08 denotes a telephone number assignment management unit that registers, changes, and deletes various information in the telephone number assignment management table 109. 109 denotes a telephone number assignment that holds the extension number of the wireless IP telephone and control information for each extension number. It is a management table.

The wireless IP telephones 41a and 41 shown in FIG.
In b, 41c, and 41d, reference numeral 201 denotes a central controller that processes information from each unit and controls each unit.
Reference numeral 2 denotes a memory for temporarily storing information used in processing by the central control device 201. Reference numeral 203 denotes a display unit for displaying various information, and reference numeral 204 denotes an input unit for detecting an operation such as a dial operation by the user. 205 is HT
TP (Hypertext Transfer Pro
The web browser unit acquires WWW contents on the Internet or an intranet according to a protocol such as tocol.

An analog sound signal 206 sensed by the microphone 207 is converted by the sound converters 209A and 209B.
And an audio controller for supplying analog audio signals from the audio converters 209A and 209B to the speaker 208 and outputting audio, a microphone 207 for receiving an audible signal, and a 208 for outputting an audible signal. Speaker.

Reference numeral 209A denotes an audio conversion unit which converts an analog audio signal from the audio control unit 206 into a digital signal and converts a digital signal from the radio control unit 210 into an analog audio signal. It converts an analog voice signal into digital data based on VoIP, and outputs VoIP from the wireless control unit 211.
Is an audio conversion unit that converts digital data based on the data into an analog audio signal.

Numeral 210 controls the radio transmission / reception unit 212 to transmit the digital signal from the voice conversion unit 209A to the public mobile communication network as a radio signal, and the digital transmission / reception unit 212 receives the digital signal from the public mobile communication network. A wireless control unit that supplies a signal to the voice conversion unit 209A, and a wireless control unit 211 that controls the wireless transmission and reception unit 213 to transmit and receive IP packets.

Reference numeral 212 denotes a wireless transmitting / receiving unit (first wireless communication unit) for transmitting a digital signal from the voice conversion unit 209A to the public mobile communication network and receiving a digital signal addressed to the wireless IP telephone from the public mobile communication network. A transmission / reception unit 213 is a radio transmission / reception unit (second radio transmission / reception unit) that transmits and receives IP packets as a wireless LAN terminal.

A switching unit 214 operates one of the wireless transmission / reception units 212 and 213 based on a control signal from the central control unit 201 depending on whether communication with the public mobile communication network is possible. is there.

A terminal ID holding unit 215 stores a terminal ID unique to the wireless IP telephone.
A user ID holding unit for storing a user ID used when logging in to the AN, and a password holding unit 217 for holding a password corresponding to the user ID.

Incidentally, 51a, 51b and 51c in FIG.
Radio waves from the wireless LAN base stations 1a, 1b, 11 (FIG. 2) arrive, and the wireless IP telephones 41a, 41b, 41c, 4
1d (FIG. 3). For example, in a corporate network, by arranging a plurality of wireless LAN base stations on a ceiling or a wall surface of an office so that adjacent AP zones overlap with each other, the entire range of a predetermined range becomes a talkable range.

Also, depending on the number of wireless IP telephones,
Appropriate grouping is performed (for example, for each department), and the telephone number management servers 3 and 13 and the IP telephone gateways 4 and 14 are installed for each group so that the load of the telephone number management servers 3 and 13 in each group is appropriately adjusted. It is desirable to keep. 2
The wireless IP telephones 41a, 41b, 41c, 41d, and the wireless LA
N, an IP composed of telephone number management servers 3 and 13, IP telephone gateways 4 and 14, wired LANs 2 and 12, etc.
It is a subnet that is a network.

For example, a Web server may be provided in each of the subnets 21 and 22 so that, for example, an extension number list is posted on a Web page so that a reference can be made when an extension is transmitted from a wireless IP telephone.

Next, the operation will be described. First, authentication of a wireless IP telephone in each subnet will be described. FIG. 4 is a sequence diagram illustrating authentication of a wireless IP telephone in a subnet. Here, a case where the wireless IP telephone 41a is authenticated will be described as an example.

When the wireless IP telephone 41a moves within a range where radio waves of the public mobile communication network cannot reach and within an AP zone of a wireless LAN (for example, an office in a building), first,
The wireless control unit 210 of the wireless IP telephone 41a detects that communication with the public mobile communication network by the wireless transmitting / receiving unit 212 has become difficult, and notifies the central control device 201 of the fact.

The central control unit 201 causes the display unit 203 to display that radio waves of the public mobile communication network have not reached,
14 to stop the transmission / reception operation of the wireless transmission / reception unit 212 and start the transmission / reception operation of the wireless transmission / reception unit 213. It should be noted that the wireless transmission / reception units 212 and 21 are operated according to the operation of the input unit 204 by the user of the wireless IP telephone 41a.
The switching of the operation 3 may be executed.

Next, as shown in FIG. 4, authentication of the wireless IP telephone 41a is executed. First, the wireless IP telephone 41a transmits a link establishment request to the wireless LAN base station 1a. When receiving the link establishment request, the wireless LAN base station 1a transmits a link establishment notification to the wireless IP telephone 41a. Next, the wireless IP telephone 41a
An access request is transmitted to the N base station 1a. The access request includes the terminal ID of the wireless IP telephone that has issued the access request (for example, a MAC (Media Access Co.)).
(control) address is added.

The wireless LAN base station 1a transmits an authentication request to the telephone number management server 3. This authentication request includes the wireless I
The terminal ID of the P telephone 41a and the base station ID of the wireless LAN base station 1a are added.

The telephone number management server 3 has the subnet 21
A user ID and a password necessary for permitting use of the wireless IP telephone 41a are determined within the server, and the user ID and the password are transmitted to the wireless LAN base station 1a as authentication confirmation.

When receiving the authentication confirmation, the wireless LAN base station 1a causes the telephone number assignment management section 108 to transmit the wireless IP telephone 41 in the telephone number assignment management table 109.
The information of the user ID and the password for a is updated.

The telephone number management server 3 and the wireless LAN base stations 1a and 1b have similar telephone number assignment management tables. FIG. 5 is a diagram showing an example of a telephone number assignment management table. Of the items in the telephone number assignment management table shown in FIG. 5, each of the wireless IP telephones 41a, 41b, 41c
Are registered in the telephone number management server 3 at the time of initial setting of the system. That is, the wireless IP telephones 41a, 41b, 41c belonging to the subnet 21 are registered in the telephone number management server 3 in advance. In addition, wireless IP
A subnet in which the telephones 41a, 41b, and 41c are registered in advance is referred to as a belonging subnet. On the other hand, when roaming to another subnet, the destination subnet is called a roaming destination subnet. Wireless I in subnet
The wireless LAN base station used when the P telephone performs communication is called a registration destination base station.

Then, the wireless LAN base stations 1a and 1b
From the telephone number management server 3, each wireless IP telephone 41a,
Extension numbers for 41b and 41c, belonging subnets,
The terminal ID and the IP address are acquired, and registered in the telephone number assignment management table 109 by the telephone number assignment management unit 108. Thereby, the telephone number management server 3 and the wireless L
The AN base stations 1a and 1b are connected to the respective wireless IP telephones 41a and 4a.
For 1b and 41c, the same extension number, belonging subnet, terminal ID, and IP address information are held. Here, the subnet 21 has been described, but the same applies to the subnet 22.

After updating the user ID and the password, the wireless LAN base station 1 a
After updating the value of the item of availability of 1a to “Yes” and updating the registration destination base station, the access permission is changed to the wireless IP telephone 41.
Send to a. Upon receiving the access permission, the wireless IP telephone 41a displays the user ID and the password added to the access permission on the display unit 203 to notify the user, and displays the user ID on the user ID.
The password is stored in the storage unit 216, and the password is stored in the password storage unit 217.

That is, for example, basic information on the wireless IP telephones 41a, 41b, 41c belonging to the subnet 21 is managed in advance by the telephone number management server 3, and is dynamically managed by the wireless LAN base station 1a. Information is appropriately acquired from the telephone number management server 3 and stored in the telephone number assignment management table 109.

In this way, the authentication of the wireless IP telephone 41a is completed, and the wireless IP telephone 41a
Will be available within.

Next, a call between wireless IP telephones in a subnet will be described. FIG. 6 is a sequence diagram illustrating a call between wireless IP telephones in a subnet. As an example, a case will be described in which a call is executed between wireless IP telephone 41a and wireless IP telephone 41c in subnet 21.

First, the wireless IP telephone 41a is
A link establishment request is transmitted to the N base station 1a. Wireless LAN
Upon receiving the link establishment request, the base station 1a transmits a link establishment notification to the wireless IP telephone 41a.

Next, the wireless IP telephone 41a is connected to the wireless LAN
The access request is transmitted to the base station 1a. An extension number, a user ID, and a password are added to this access request. The wireless LAN base station 1a refers to the telephone number assignment management table 109, confirms that the extension number, user ID and password added to the access request are correct, and then accesses the wireless IP telephone 41a. Notify permission.

When receiving the access permission, the wireless IP telephone 41a requests the wireless LAN base station 1a to set up a call. To this call setting, a source extension number and a destination extension number are added.

When the call setting is requested, the wireless LAN base station 1a refers to the telephone number assignment management table 109, searches for the extension number of the destination, and searches for the wireless LAN having the extension number of the destination.
It is determined whether or not the P telephone 41c is present in its own AP zone 51a, and its wireless IP address is stored in its own AP zone 51a.
If the telephone 41c does not exist, a destination request is transmitted to the telephone number management server 3. The destination extension number and the source base station ID are added to the destination request.

The telephone number management server 3 searches for the extension number of the destination specified by the destination request, and determines whether or not the wireless IP telephone 41c having the destination extension number in the subnet 21 is currently usable. If the wireless IP telephone 41c having the destination extension number can be used in the subnet 1, a destination notification is transmitted to the wireless LAN base station 1a. The destination extension number, the destination IP address, and the destination base station ID are added to the destination notification. Meanwhile, subnet 2
If the wireless IP telephone 41c is not currently available in the telephone number 1, the telephone number management server 3 makes an inquiry to a telephone number management server in another subnet.

When receiving the destination notification, the wireless LAN base station 1a requests the wireless LAN base station 1b having the destination base station ID to set up a call. The destination IP address and the source IP address are added to this call setting.

When receiving the call setting, the wireless LAN base station 1b transmits the call setting to the destination wireless IP telephone 41c. A source extension number and a destination base station ID are added to this call setting. When receiving the call setting, the wireless IP telephone 41c notifies the wireless LAN base station 1b of the call setting acceptance. A source extension number and a destination extension number are added to the call setting reception.

The wireless LAN base station 1b transmits a call setting acceptance to the wireless LAN base station 1a. In this call setting reception,
A destination IP address and a source IP address are added. The wireless LAN base station 1a is a wireless LAN base station 1
a, the call setting reception is received by the wireless I
Notify the P telephone 41a. A source extension number and a destination extension number are added to the call setting reception.

The wireless IP telephone 41c is connected to the wireless LA
An access request is transmitted to the N base station 1b. The access request includes the extension number of the wireless IP telephone 41c, the user I
D and a password are added.

Upon receiving the access request, the wireless LAN base station 1b refers to the telephone number assignment management table 109 and confirms that the extension number, user ID and password added to the access request are correct. After the confirmation, the access permission is notified to the wireless IP telephone 41c.

Upon receiving this access permission, the wireless IP telephone 41c requests a call from the wireless LAN base station 1b. A source extension number and a destination extension number are added to this call. When a call is requested from the wireless IP telephone 41c, the wireless LAN base station 1b
Request a call to The destination IP address and the source IP address are added to this call. Wireless LAN
When a call is requested from the wireless LAN base station 1b, the base station 1a transmits the call to the wireless IP telephone 41a. A source extension number and a destination extension number are added to this call.

Further, the wireless IP telephone 41c is
The response is transmitted to the AN base station 1b. A source extension number and a destination extension number are added to this response. Upon receiving the response, the wireless LAN base station 1b
A response is transmitted to the N base station 1a. This response includes the destination I
A P address and a source IP address are added. Upon receiving the response, the wireless LAN base station 1a
A response is transmitted to the wireless IP telephone 41a. A source extension number and a destination extension number are added to this response.

In this manner, the wireless IP telephone 41a is connected via the wireless LAN and the wired LAN within the subnet 21.
A call is started between the mobile phone and the wireless IP telephone 41c.

Next, a description will be given of a call by a wireless IP telephone during roaming. FIG. 7 is a sequence diagram illustrating a telephone call by a wireless IP telephone during roaming. As an example, the wireless IP telephone 41a belonging to the subnet 21
A case where roaming is performed using the N base station 11 will be described.

First, the wireless IP telephone 41a is
A link establishment request is transmitted to the N base station 11. Wireless LAN
Upon receiving the link establishment request, the base station 11 transmits a link establishment notification to the wireless IP telephone 41a.

Next, the wireless IP telephone 41a is connected to the wireless LAN
A roaming request is transmitted to the base station 11. The extension number, the user ID, and the password of the wireless IP telephone 41a are added to the roaming request. When receiving the roaming request from the wireless IP telephone 41a, the wireless LAN base station 11 transmits the roaming request to the telephone number management server 13 on the subnet 22. The extension number of the wireless IP telephone 41a, the user ID and the password, and the base station ID of the wireless LAN base station 11 are added to the roaming request.

The telephone number management server 13 of the subnet 22
Receives the roaming request from the wireless LAN base station 11, adds the telephone number management server number of the subnet 22 to the extension number and the user ID of the wireless IP telephone 41a, and sets the subnet 2 to which the wireless IP telephone 41a belongs.
A roaming destination change request is transmitted to the first telephone number management server 3.

The telephone number management server 3 of the subnet 21
Receives the roaming destination change request and refers to the telephone number assignment management table to confirm that the extension number, user ID, and password of the wireless IP telephone 41a added to the roaming destination change request are correct. After confirming, the wireless IP telephone 41 on its own subnet 21
An extension number use suspension process for a is executed. In the extension number use suspension processing, the value of the item of availability of the wireless IP telephone 41a in the telephone number assignment management table is updated to “No”, the value of the item of the roaming destination subnet is updated to the subnet 22 (SN2), and the use is performed. Person ID
And the value of the password item are deleted.

The change of the contents of the telephone number assignment management table in the telephone number management server 3 is immediately transmitted to the wireless LAN base station that was the original registration destination, and the contents of the telephone number assignment management table 109 in the wireless LAN base station are changed. With the contents of the telephone number assignment management table in the telephone number management server 3.

After completing the extension number use suspension processing for the wireless IP telephone 41a, the telephone number management server 3
The telephone number management server 13 that has transmitted the roaming request
Send roaming permission to The number indicating the telephone number management server 3 and the extension number of the wireless IP telephone 41a are added to the roaming permission.

Upon receiving this roaming permission, the telephone number management server 13 performs an extension number use start process for the wireless IP telephone 41a. In the extension number use start process, the telephone number management server 13 confirms that the telephone number management server number added to the roaming permission is not a roaming prohibition object, and then determines whether or not to use the telephone number management table. The value of the item of the belonging subnet is updated to the subnet 21 (SN1), and the value of the item of the roaming destination subnet is updated to the subnet 22 (S1).
N2), the user ID and the password are newly generated, and the values of the items of the user ID and the password are updated.

When the telephone number management server 13 completes the extension number use start processing, it transmits a roaming permission to the wireless LAN base station 11. The roaming permission is added with the extension number of the wireless IP telephone 41a and a new user ID and password in the subnet 22.

When receiving the roaming permission from the telephone number management server 13, the wireless LAN base station 11 stores the extension number of the wireless IP telephone 41a added to the roaming permission, the user ID and the password in the subnet 22, and the telephone number. After registering in the assignment management table 109, a roaming permission is transmitted to the wireless IP telephone 41a. A new user ID and password on the subnet 22 are added to the roaming permission.

Thus, the wireless IP telephone 41a
However, when the mobile phone moves to another subnet 22, the mobile phone enters a state where a call can be executed by roaming using the wireless LAN base station 11 in the subnet 22.

Note that the wireless IP telephone 41a sends the wireless LA
User I added to roaming request to N base station 11
If D and the password are not correct, the telephone number management server 3 of the subnet to which the wireless IP telephone 41a belongs does not transmit roaming permission, and in that case, roaming is not executed. Also, in the extension number use start processing, roaming is not executed even when it is determined that the wireless IP telephone 41a that has transmitted the roaming request is a roaming prohibition target terminal.

FIG. 8 is a diagram showing an example of a signal flow during roaming and an example of a communication path when a call arrives at a roaming wireless IP telephone.

As shown in FIG. 8, the wireless IP telephone 41a
Moves to the subnet 22 as described above, and when roaming is permitted, the roaming destination is notified to the original wireless LAN base station 1a (broken line in FIG. 8). As a result, the fact that the wireless IP telephone 41a is roaming is registered in the wireless LAN base stations 1a and 11.

At that time, the wireless I
When a call is transmitted from the P telephone 41c to the roaming wireless IP telephone 41a on the subnet 22, the wireless IP telephone 41c wirelessly communicates via the wireless LAN base station 1b, the wireless LAN base station 1a, the router 32, and the wireless LAN base station 11. A communication path to the IP telephone 41a is formed.

Note that the telephone number management servers 3 and 13 may group predetermined wireless LAN base stations or predetermined subnets, and set whether or not roaming of wireless IP telephones is possible for each group. Further, the telephone number management servers 3 and 13 set roaming permission / prohibition of each wireless IP telephone belonging to its own subnet to one of a plurality of levels, and permit roaming of the wireless IP telephone according to the set level. The condition may be changed. For example, when the level is 1, roaming of the registered wireless IP telephone is unconditionally permitted, and when the level is 2, the wireless IP telephone is currently in the same group of wireless LAN base stations or subnets. Only the roaming of the registered wireless IP telephone is permitted.

As described above, according to the first embodiment, wireless IP telephones 41a, 41b, 41c, 41d
Have a unique terminal ID, transmit the terminal ID at the start of use, and after authentication, transmit and receive voice data as an IP packet via the wireless LAN to execute a call, and perform wireless communication with the wireless LAN base stations 1a, 1b, 11 Are the wireless IP telephones 41a, 41
b, 41c, 41d via the wireless LAN
D and voice data, and requests authentication of the wireless IP telephones 41a, 41b, 41c, 41d based on the terminal ID, and the telephone number management server 3, 13 is used by one or more wireless IP telephones 41a, 41b, 41c. , 41d are registered in advance, and the wireless IP telephone 4
Terminal ID at the start of use of 1a, 41b, 41c, 41d
Based on the wireless IP telephones 41a, 41b, 41
Since c and 41d are authenticated, each wireless IP telephone can be identified, and an effect that roaming can be permitted only to a previously registered wireless IP telephone can be obtained.

According to the first embodiment, one or a plurality of wireless LAN base stations 1a, 1
b (11) and the telephone number management server 3 (13), and the telephone number management server 3 (13) is provided with the wireless IP telephones 41a, 41 belonging to its own subnet 21 (22).
b, 41c (41d) when the wireless IP telephone 41d (41a, 41b, 41c) belonging to another subnet 22 (21) belongs to another subnet 22 (21) and has information on whether or not roaming is possible The mobile IP telephone 41d (41a, 41b, 41c) inquires of the telephone number management server 13 (3) of the subnet 22 (21) to which the wireless IP telephone 41d (41a, 41b, 41c) belongs whether roaming is possible or not. 22), the call of the wireless IP telephone 41d (41a, 41b, 41c) is permitted.
In addition to the above, it is possible to distribute the load of authentication and the like, and to achieve the roaming function of each wireless IP telephone.

Further, according to the first embodiment, the telephone number management servers 3 and 13 are connected to the wireless IP telephone 41 only in a predetermined wireless LAN base station or a predetermined subnet.
a, 41b, 41c and 41d are allowed to be roamed, so that roaming availability can be individually set,
The effect that convenience is improved is obtained.

Further, according to the first embodiment, the telephone number management server 3 (13)
Each wireless IP telephone 41a, 41b belonging to (22),
The roaming permission of 41c (41d) is set to one of a plurality of levels, and the condition for permitting roaming of the wireless IP telephones 41a, 41b, 41c (41d) is changed according to the set level. Multiple wireless I
The effect is obtained that the roaming setting for the P telephones 41a, 41b, 41c, 41d can be easily executed.

Embodiment 2 In the IP telephone system according to the second embodiment of the present invention, a wireless LAN base station determines whether or not an IP packet in traffic is a VoIP packet, and preferentially processes the VoIP packet.

FIG. 9 is a block diagram showing a configuration of wireless LAN base stations 1a, 1b and 11 according to the second embodiment of the present invention. In FIG. 9, reference numeral 110 denotes a traffic monitoring unit that acquires traffic information from the wireless control unit 107;
Reference numeral 111 denotes a VoIP priority processing unit that detects a VoIP packet in the traffic based on the traffic information acquired by the traffic monitoring unit 110 and executes transmission and reception of the VoIP packet with priority.

Note that the IP according to the second embodiment of the present invention
The other components of the telephone system are the same as those according to the first embodiment, and a description thereof will be omitted.

Next, the operation will be described. In this IP telephone system, it is possible to transfer both voice data and general data (for example, download data of various contents) IP-packetized from a wireless LAN base station to a wireless IP telephone. For example, the wireless IP telephone 41a
The Web server 5 accesses the Web server 5 via the wireless transmission / reception unit 105, the wireless control unit 107, and the wired LAN interface unit 106 of the wireless LAN base station 1a, and
05 allows the user to browse the Web page of the Web server 5 and download various data.

In general, data transfer is performed on an IP network without discrimination depending on whether the contents of an IP packet are voice data or general data.
For voice data communication, U
DP (User Datagram Protocol)
l) is used, and for communication of general data such as when browsing a Web page of the Web server 5, TCP (Transmission Control) is used as an upper layer protocol of IP.
ol Protocol) is used. The type of the higher-level protocol is described in the item of the protocol in the header of the IP packet. FIG. 10 is a diagram showing the format of the header of an IP packet.

Therefore, in the second embodiment, traffic monitoring section 110 is connected to wired LAN interface section 106.
, And refers to the header of the IP packet via the wireless control unit 107, and supplies the information to the VoIP priority processing unit 111. If the upper protocol of the IP packet is UDP, the VoIP priority processing unit 111 causes the wireless control unit 107 to transmit the IP packet to the wireless transmission / reception unit 105 preferentially. In the case of TCP, after confirming the presence / absence of an unprocessed UDP IP packet, if there is an unprocessed UDP IP packet, the reception of the TCP IP packet by the wired LAN interface unit 106 is temporarily suppressed. .

Note that since UDP may be used in addition to voice communication, it is determined whether the upper layer protocol is UDP and the destination IP address is the IP address of any wireless IP telephone. Alternatively, an IP packet whose upper layer protocol is UDP and whose destination IP address is the IP address of one of the wireless IP telephones may be preferentially transmitted.

Thus, when voice data and general data are transferred in the packet communication between the wireless LAN base station and the wireless IP telephone, the voice data is preferentially transmitted to the wireless IP telephone.

The other operation is the same as that of the first embodiment, and the description is omitted.

As described above, according to the second embodiment, wireless IP telephones 41a, 41b, 41c, and 41d transmit data (for example, data provided by Web server 5) by other services in subnets 21 and 22. It can be obtained as an IP packet, and the wireless LAN base station 1
a, 1b and 11 transmit the voice data IP packet to another IP
The wireless IP telephones 41a, 41b,
Since transmission is performed to 41c and 41d, it is possible to obtain an effect that a good communication state can be maintained.

Also, according to the second embodiment, the wireless L
Since the AN base stations 1a, 1b, and 11 refer to the header of the IP packet, detect the upper protocol of the IP packet, and determine the type of the IP packet based on the type of the upper protocol. An effect is obtained that the type of the IP packet can be determined.

Embodiment 3 FIG. An IP telephone system according to Embodiment 3 of the present invention includes:
This is to calculate a charge according to the traffic.

FIG. 11 shows a wireless L in the third embodiment.
FIG. 3 is a block diagram showing a configuration of AN base stations 1a, 1b, 11; In FIG. 11, reference numeral 112 denotes a traffic monitoring unit 11.
0 is a traffic accumulator that acquires traffic information from 0 and calculates a charge based on the traffic information;
Reference numeral 3 denotes a billing data holding unit that stores billing information calculated by the traffic integrating unit 112.

The other components in the third embodiment are the same as those in the second embodiment, and a description thereof will not be repeated.

Next, the operation will be described. The traffic monitoring units 110 of the wireless LAN base stations 1 a, 1 b, 11 are transmitted from the wired LAN interface unit 106 to the wireless control unit 107.
, And supplies the information to the traffic integrator 112 as well.

The traffic accumulating section 112 checks from the header of the IP packet whether each IP packet of the traffic is a packet for voice communication, and the source address (or destination address) of the IP packet. The control unit 101 causes the telephone number assignment management unit 108 to search the telephone number assignment management table 109, recognizes the extension number of the source (or destination) from the IP address of the source (or destination), and recognizes the extension. The billing data is integrated for each number, and the billing data holding unit 1 is stored in the central controller 101.
13 causes the accounting data to be held.

FIG. 12 is a diagram showing an example of a billing data table in the billing data holding unit. In the charging data table, as an initial state, extension numbers and IP addresses of all wireless IP telephones that have completed authentication to the subnet are set in advance. Then, when a certain wireless IP telephone starts voice communication, the date and the communication start time at that time are recorded, and when the voice communication ends, the communication end time is recorded. Each time an IP packet is transmitted / received, the number of used extension IP packets is accumulated.

Furthermore, the number of IP packets of the entire subnet at the extension communication start time and the number of IP packets of the entire subnet at the extension communication end time are recorded.
These are for weighting the accounting according to the IP traffic in the subnet. For example, based on the ratio of the number of IP packets of the entire subnet at the extension communication start time and the average number of IP packets of the entire subnet at the extension communication end time, and the ratio of the number of extension IP packets used, the usage amount in the total amount is calculated. The rate is determined and the charging rate is set based on the rate. In this case, the total number of IP packets in the wireless LAN base station may be used instead of the number of IP packets in the entire subnet.

Note that the charging data is stored in the charging data storage unit 113 of the wireless LAN base station, but later, all data in the subnet is collected in a charging server (not shown) (may be a telephone number management server). You may do so. Further, the charging of the roaming wireless IP telephone may be transferred to the charging server in the subnet to which the wireless IP telephone belongs when the roaming is completed. Further, the billing data stored in the billing server may be transmitted to a communication carrier via an IP telephone gateway, a dial-up router, or the like. This makes it possible to easily execute the accounting totaling process.

Further, the charging data is transmitted to the wireless LAN base station 1.
a, 1b, 11 to wireless IP telephones 41a, 41b, 4
1c and 41d, and when detecting that the wireless IP telephones 41a, 41b, 41c and 41d have moved to the radio range of the public mobile communication network, the accounting data is transmitted to the communication carrier. Is also good.

Note that the other operations are the same as those according to the second embodiment, and a description thereof will be omitted.

As described above, according to the third embodiment, the wireless LAN base stations 1a, 1b and 11 detect the IP packet of the voice data and charge the wireless IP telephone 41a according to the traffic of the voice data. , 41b, 41c, 41d, so that the wireless IP telephone 41a,
The effect is obtained that accurate billing information can be obtained for each of 41b, 41c and 41d.

According to the third embodiment, the wireless L
In the case where there is provided a billing server for counting the bills calculated by the AN base stations 1a, 1b and 11, the effect that a communication carrier or the like can charge a user a fee for use can be simplified. can get.

Further, according to the third embodiment, wireless IP telephones 41a, 41b, 41c, 4 when roaming.
1d is charged to the wireless IP telephones 41a, 41b, 4
Since transmission is performed to the subnet to which 1c and 41d belong, it is possible to obtain an effect that accurate billing information can be obtained including the usage fee during roaming.

Further, according to the third embodiment, the wireless LAN base stations 1a, 1b, 11
Since the billing of the P telephones 1a, 1b, 11 is transmitted to the billing server of the subnet 21, 22 to which the wireless IP telephones 41a, 41b, 41c, 41d belong,
This has the effect of simplifying the processing when a telecommunications carrier or the like bills a user for a usage fee.

Further, according to the third embodiment, the wireless LAN base stations 1a, 1b, 11 transmit, for each call, the total traffic amount at the call start time, the total traffic amount at the call end time, and Since the charging rate is calculated based on the traffic volume due to the call, the effect is obtained that charging is performed at an appropriate charging rate according to the traffic situation.

Embodiment 4 The IP telephone system according to the fourth embodiment of the present invention is configured to calculate a charge according to traffic in a wireless IP telephone.

FIG. 13 is a diagram showing a wireless communication system according to the fourth embodiment.
It is a block diagram which shows the structure of P telephone 41a, 41b, 41c, 41d. In FIG. 13, reference numeral 218 denotes a traffic monitoring unit that obtains traffic information from the wireless control unit 211. Reference numeral 219 denotes a traffic integration unit that obtains traffic information from the traffic monitoring unit 218 and calculates a charge based on the traffic information. , 220 are billing data holding units for storing billing information calculated by the traffic integrating unit 219.

The other components in the fourth embodiment are the same as those in the second embodiment, and a description thereof will not be repeated.

Next, the operation will be described. The traffic monitoring unit 218 of each of the wireless IP telephones 41a, 41b, 41c, and 41d refers to the header of the IP packet received (or transmitted) by the wireless transmission / reception unit 213, and supplies the information to the traffic accumulation unit 219.

The traffic accumulating section 219 checks whether each IP packet of the traffic is a voice communication packet from the header of the IP packet, and if the packet is a voice communication packet, accumulates billing data. Device 201
Causes the charge data holding unit 220 to hold the charge data.

The charging data is stored in the charging data holding unit 2 of each of the wireless IP telephones 41a, 41b, 41c, 41d.
20. However, all data in the subnet may be aggregated later in a charging server (not shown) (may be a telephone number management server). Further, the billing data stored in the billing server may be transmitted to a communication carrier via an IP telephone gateway, a dial-up router, or the like. This makes it possible to easily execute the accounting totaling process.

Further, the billing data of the roaming wireless IP telephone may be transferred, for example, as additional information of roaming permission when returning to its own subnet. As a result, billing for a call during roaming can be executed.

Further, the wireless IP telephones 41a, 41b,
When detecting that 41c and 41d have moved to the radio wave range of the public mobile communication network, billing data may be transmitted to the communication carrier.

Note that the other operations are the same as those according to the second embodiment, and a description thereof will be omitted.

As described above, according to the fourth embodiment, wireless IP telephones 41a, 41b, 41c, 41d
Has detected the IP packet of the voice data and calculated the charge according to the traffic of the voice data.
The effect is obtained that accurate billing information can be obtained for each of the P telephones 41a, 41b, 41c, 41d.

According to the fourth embodiment, the wireless I
When the P telephones 41a, 41b, 41c, and 41d are provided with an accounting server that aggregates the accounting calculated, it is possible to simplify the processing when a communication carrier or the like bills the user for the usage fee. Can be

In the first to fourth embodiments, the router 32 may be used for communication between subnets, or the PSTN / ISDN network 31 may be used. Also, the number of subnets, the number of wireless LAN base stations, the wireless IP
The number of telephones is not limited to the above.
Further, the wireless LAN between the wireless LAN base station and the wireless IP telephone may use radio waves as a transmission medium or infrared rays as a transmission medium. Further, in addition to the router 32, a wireless emergency relay device that transmits and receives IP packets between subnets when the router 32 is in a failure state or a congestion state may be provided.

[0150]

As described above, according to the present invention, a wireless IP telephone has a unique terminal ID, transmits a terminal ID at the start of use, and after authentication authenticates voice data via a wireless LAN. The wireless LAN base station transmits / receives the terminal ID and voice data to / from the wireless IP telephone via the wireless LAN by transmitting / receiving packets and transmitting / receiving a call.
Requesting the authentication of the wireless IP telephone based on the terminal IDs of the one or more wireless IP telephones.
And the telephone number are registered in advance, and the wireless IP telephone is authenticated based on the terminal ID from the wireless IP telephone at the start of use of the wireless IP telephone, so that each wireless IP telephone can be identified and registered in advance. There is an effect that roaming can be permitted only to the wireless IP telephone set.

According to the present invention, one for each subnet
Or a plurality of wireless LAN base stations and a telephone number management server, wherein the telephone number management server has information on whether or not roaming of a wireless IP telephone belonging to its own subnet is possible, and a wireless IP telephone belonging to another subnet When moving to its own subnet, it asks the telephone number management server of the subnet to which the wireless IP telephone belongs whether roaming is possible, and only when roaming is possible,
Since the call of the wireless IP telephone in the own subnet is permitted, load such as authentication by the telephone number management server can be distributed, and each wireless IP telephone can be distributed.
There is an effect that the roaming function of the telephone can be realized.

According to the present invention, since the telephone number management server permits roaming of a wireless IP telephone only in a predetermined wireless LAN base station or a predetermined subnet, it is possible to individually set whether or not roaming is possible. There is an effect that convenience is improved.

According to the present invention, the telephone number management server sets roaming permission / prohibition of each wireless IP telephone belonging to its own subnet to one of a plurality of levels, and according to the set level, determines whether or not roaming is possible. Since the conditions for permitting roaming have been changed, multiple wireless IP
There is an effect that the roaming setting for the telephone can be easily executed.

According to the present invention, a relay device for transmitting / receiving an IP packet between subnets and an IP address between the subnets when the relay device is in a failure state or a congestion state are provided.
The provision of the emergency relay device for transmitting and receiving packets has the effect of increasing redundancy and improving the reliability of the system.

According to the present invention, the wireless IP telephone can acquire the data of another service in the subnet by the IP packet, and the wireless LAN base station gives the IP packet of the voice data a higher priority than the other IP packet.
Since the call is transmitted to the telephone, there is an effect that the call state can be kept good.

According to the present invention, the wireless LAN base station is
The upper protocol of the IP packet is detected with reference to the header of the P packet, and the type of data is determined based on the type of the upper protocol. Therefore, the type of the IP packet can be easily determined. This has the effect.

According to the present invention, the wireless LAN base station detects the IP packet of the voice data and calculates the charge corresponding to the traffic volume of the voice data for each wireless IP telephone. There is an effect that accurate billing information can be obtained.

According to the present invention, one or more wireless L
The provision of the accounting server for counting the accounting calculated by the AN base station is provided, so that it is possible to simplify the processing when a communication carrier or the like charges the user for the usage fee.

According to the present invention, the wireless LAN base station
An IP packet of voice data is detected, a charge corresponding to the communication volume of the voice data is calculated for each wireless IP telephone, and the charge of the wireless IP telephone during roaming is transmitted to the subnet to which the wireless IP telephone belongs. Therefore, there is an effect that accurate billing information including a usage fee at the time of roaming can be obtained.

According to the present invention, one or more wireless L
The wireless LAN base station is provided with a charging server that aggregates the charging calculated by the AN base station, and the wireless LAN base station transmits the charging of the wireless IP telephone during roaming to the charging server of the subnet to which the wireless IP telephone belongs. This has the effect of simplifying the process when a business or the like bills the user for the usage fee.

According to the present invention, the wireless LAN base station
For each call, the billing rate is calculated based on the total traffic volume at the call start time, the total traffic volume at the call end time, and the traffic volume due to the call. There is an effect that charging is performed at a charging rate.

According to the present invention, the wireless IP telephone detects the IP packet of the voice data and calculates the billing according to the traffic volume of the voice data. There is an effect that it can be obtained.

According to the present invention, one or more wireless I
The provision of the accounting server for totalizing the accounting calculated by the P telephone sets has an effect of simplifying processing when a communication carrier or the like bills a user for a usage fee.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an IP telephone system according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration example of a wireless LAN base station in FIG. 1;

FIG. 3 is a block diagram illustrating a configuration example of a wireless IP telephone in FIG. 1;

FIG. 4 is a sequence diagram illustrating authentication of a wireless IP telephone in a subnet.

FIG. 5 is a diagram showing an example of a telephone number assignment management table.

FIG. 6 is a sequence diagram illustrating a call between wireless IP telephones in a subnet.

FIG. 7 is a sequence diagram illustrating a call by a wireless IP telephone during roaming.

FIG. 8 is a diagram showing an example of a signal flow during roaming and an example of a communication path when there is an incoming call to a wireless IP telephone during roaming.

FIG. 9 shows a wireless LAN according to Embodiment 2 of the present invention.
FIG. 3 is a block diagram illustrating a configuration of a base station.

FIG. 10 is a diagram showing a format of a header of an IP packet.

FIG. 11 is a block diagram showing a configuration of a wireless LAN base station according to the third embodiment.

FIG. 12 is a diagram illustrating an example of a billing data table in a billing data holding unit.

FIG. 13 is a block diagram showing a configuration of a wireless IP telephone according to a fourth embodiment.

FIG. 1 is a diagram illustrating a configuration example of a conventional IP telephone system based on the H.323 system.

[Explanation of symbols]

1a, 1b, 11 wireless LAN base station, 3, 13 telephone number management server, 21, 22 subnet, 32 router (relay device), 41a, 41b, 41c, 41d wireless IP telephone, 212 wireless transmission / reception unit (first wireless (Transceiver), 213 wireless transceiver (second wireless transceiver).

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Nobuhito Miyauchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term (reference) 5K033 AA08 AA09 BA14 CB01 CB08 CC01 DA01 DA06 DA19 DB09 DB18 EC03 5K101 LL02 LL11 MM07 PP03 SS01 SS06 SS07 SS08 UU19

Claims (26)

[Claims] 1. A wireless IP having a unique terminal ID, transmitting said terminal ID at the start of use, and authenticating, transmitting and receiving voice data as IP packets via a wireless LAN to execute a call. A telephone, and one or more wireless LAN base stations that transmit and receive the terminal ID and voice data between the wireless IP telephone via a wireless LAN and request authentication of the wireless IP telephone based on the terminal ID. And a telephone number management server that registers terminal IDs and telephone numbers of one or more wireless IP telephones in advance and authenticates the wireless IP telephones based on terminal IDs from the wireless IP telephones at the start of use of the wireless IP telephones. IP telephone system equipped. 2. A wireless IP telephone, comprising:
N based on a predetermined radio signal from the base station,
2. The IP telephone system according to claim 1, wherein a terminal ID is transmitted when detecting that the terminal has moved to an access point zone of N base stations. 3. A wireless IP telephone, comprising: a first wireless transmission / reception unit for executing a call via a public mobile communication network;
And a second wireless transmission / reception unit for making a call via the N. When the first wireless transmission / reception unit is operating, based on a predetermined wireless signal from one of the wireless LAN base stations, When detecting that the mobile station has moved to the access point zone of the wireless LAN base station, the operation of the first wireless transceiver is stopped, and the operation of the second wireless transceiver is started. Item 1. The IP telephone system according to Item 1. 4. Each subnet includes one or more wireless LAN base stations and a telephone number management server, wherein the wireless IP telephone belongs to one of the subnets, and the telephone number management server belongs to its own subnet. If the wireless IP telephone belonging to another subnet has moved to its own subnet and has information on whether or not roaming of the wireless IP telephone is 2. The IP telephone system according to claim 1, wherein an inquiry is made as to whether or not roaming is possible, and only when the roaming is possible, the call of the wireless IP telephone on the own subnet is permitted. 5. The IP telephone system according to claim 4, wherein the telephone number management server registers in advance a wireless IP telephone to which roaming is permitted, and permits only roaming of the registered wireless IP telephone. . 6. A telephone number management server, comprising:
Wireless IP only in N base stations or predetermined subnet
5. The IP telephone system according to claim 4, wherein roaming of the telephone is permitted. 7. The telephone number management server sets roaming availability of each wireless IP telephone belonging to its own subnet to one of a plurality of levels, and permits roaming of the wireless IP telephone according to the set level. The IP telephone system according to claim 4, wherein conditions are changed. 8. A relay device for transmitting and receiving an IP packet between subnets, wherein when the relay device is in a failure state or a congestion state,
5. The communication system according to claim 4, further comprising: an emergency relay device for transmitting and receiving IP packets between subnets.
P telephone system. 9. The wireless IP telephone can acquire data of another service in the subnet by using an IP packet, and the wireless LAN base station gives the IP packet of voice data to the wireless IP telephone with priority over the other IP packets. The IP telephone system according to claim 1, wherein the transmission is performed. 10. The wireless LAN base station refers to a header of an IP packet, detects a higher-level protocol of the IP packet, and determines the type of data based on the type of the higher-level protocol. Item 9 IP
Phone system. 11. The wireless LAN base station transmits the voice data I
2. The IP telephone system according to claim 1, wherein a P packet is detected, and a charge according to a communication amount of the voice data is calculated for each wireless IP telephone. 12. The IP telephone system according to claim 11, further comprising a charging server for counting charges calculated by one or more wireless LAN base stations. 13. The wireless LAN base station transmits the voice data I
Detecting a P packet, calculating a charge corresponding to the communication amount of the voice data for each wireless IP telephone, and transmitting a charge for the wireless IP telephone during roaming to a subnet to which the wireless IP telephone belongs. The IP telephone system according to claim 4, wherein 14. A charging server for counting charges calculated by one or more wireless LAN base stations, wherein the wireless LAN base station performs charging of a wireless IP telephone during roaming on a subnet to which the wireless IP telephone belongs. 14. The IP telephone system according to claim 13, wherein the transmission is performed to a billing server. 15. The wireless LAN base station calculates a charging rate for each call based on the total traffic volume at the call start time, the total traffic volume at the call end time, and the traffic volume due to the call. 14. The IP telephone system according to claim 11, wherein: 16. The wireless IP telephone operates as a voice data IP.
2. The IP telephone system according to claim 1, wherein a packet is detected and a charge is calculated according to a communication amount of the voice data. 17. The IP telephone system according to claim 16, further comprising a charging server for counting charges calculated by one or more wireless IP telephones. 18. A wireless LAN with a wireless LAN base station
IP that communicates voice data and makes phone calls
A wireless IP telephone having a unique terminal ID, transmitting the terminal ID at the start of use, transmitting and receiving voice data as an IP packet via a wireless LAN after authentication, and performing a telephone call. . 19. When detecting movement to an access point zone of a wireless LAN base station based on a predetermined wireless signal from any wireless LAN base station, transmitting a terminal ID. The wireless IP telephone according to claim 18. 20. A wireless communication system comprising: a first wireless transmission / reception unit for performing a call via a public mobile communication network; and a second wireless transmission / reception unit for performing a call via a wireless LAN. While operating the unit, one of the wireless LAN
The wireless LAN based on a predetermined wireless signal from the base station
19. The method according to claim 18, wherein when detecting that the mobile station has moved to an access point zone of a base station, the operation of the first wireless transceiver is stopped and the operation of the second wireless transceiver is started. Wireless IP phone. 21. Detecting an IP packet of voice data,
19. The wireless IP telephone according to claim 18, wherein a charge according to a communication amount of the voice data is calculated. 22. A wireless LAN base station which communicates voice data with a wireless IP telephone via a wireless LAN and relays a call by the wireless IP telephone.
A terminal ID and voice data of the wireless IP telephone are transmitted to and received from the P telephone via a wireless LAN, and the terminal I
A wireless LAN base station that requests authentication of the wireless IP telephone based on D. 23. An IP packet of voice data is detected,
23. The wireless LAN base station according to claim 22, wherein a charge according to the communication volume of the voice data is calculated for each wireless IP telephone. 24. Referring to a header of an IP packet, detecting an upper layer protocol of the IP packet, determining a type of the IP packet based on a type of the upper layer protocol, and detecting an IP packet of voice data. The wireless LAN base station according to claim 23, wherein: 25. An audio data IP packet is detected,
23. The wireless IP telephone according to claim 22, wherein the accounting according to the communication volume of the voice data is calculated for each wireless IP telephone, and the accounting of the wireless IP telephone during roaming is transmitted to a subnet to which the wireless IP telephone belongs. Wireless LAN base station. 26. A charging rate is calculated for each call based on the total traffic volume at the call start time, the total traffic volume at the call end time, and the traffic volume due to the call. The wireless LAN base station as described.