JP4012082B2 - Communication terminal, control method thereof, and control program thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication terminal that connects to an IP network and makes a call by a predetermined IP telephone system, a control method thereof, and a control program thereof.
[0002]
[Prior art]
In recent years, the spread of the Internet has been rapidly expanding worldwide, and Internet telephones (hereinafter referred to as IP telephones) have been attracting attention because of the advantage that communication charges can be significantly reduced. VoIP (Non-Patent Document 1 below: ITU-T recommendation H.323, etc.), which is currently the most prominent standard for Internet telephones, has been proposed in various forms.
[0003]
As one usage form of the IP phone, a form in which the IP telephone is directly connected to each other via the LAN in a state of being always connected via the Internet service provider is conceivable. In an IP phone, rendezvous servers are prepared on the Internet because users who want to communicate with each other need to make an IP connection with each other. The rendezvous server has a correspondence table of telephone numbers and the nearest Internet service provider, notifies the callee user of the call request and the IP address of the caller user via the public line, and both users have the rendezvous server Calls are realized by simultaneous connection through the network. As one of standards using this rendezvous server, SIP (Session Initiate Protocol: Non-Patent Document 2: RFC2543) is known.
[0004]
[Non-Patent Document 1]
ITU-T recommendation 323
[Non-Patent Document 2]
RFC2543 (http://www.faqs.org/rfcs/rfc2543.html)
[0005]
[Problems to be solved by the invention]
However, many conventional IP telephone technologies only perform voice communication over an IP connection.
[0006]
For example, when a call is being made on an IP phone, the user cannot access any Internet resources available using the IP address even though the IP address of each other is known. It cannot be said that it provides.
[0007]
For example, conventionally, even if it is desired to convey the location of a certain WEB page, FTP server, or other Internet resources to the other party, there is only a method of communicating with the voice on the IP telephone call. The address of an Internet resource is usually expressed in a format such as URL or URI, but in many cases, the number of characters is not as short as a telephone number. It is difficult and very annoying.
[0008]
Furthermore, at present, there are telephones having a mechanism for using Internet resources such as a WEB browser, but even if a user uses such a terminal, the Internet resource once transmitted by voice as described above is used. The address must be entered again into a WEB browser or the like.
[0009]
In some cases, the terminal of the user supports the use of the Internet resource such as the IP phone and the browsing of the WEB page only by different connection methods. In such a case, the user disconnects the IP phone and then re-enters the IP. Connection must be made. If it is inevitably necessary to make both calls and use of Internet resources compatible, it is necessary to use another device such as a PC in addition to the terminal for the IP phone and use the Internet resource on another call connection.
[0010]
The object of the present invention is to solve the above-mentioned problems, and to share the Internet resources with the other party who is talking on the IP phone simply and cheaply without using other equipment, and without having to perform any troublesome operations. There is to be able to do it.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, according to the present invention, a communication terminal connected to an IP network and making a call by a predetermined IP telephone system accesses a server that provides a target Internet resource, and transmits a packet at that time The same Internet resource as that of the other party's communication terminal is controlled by changing the source address of the server to the IP address of the other party's communication terminal so that the response packet of the server is transmitted to the other party's communication terminal. A configuration having Internet resource sharing means for sharing and using is adopted.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0013]
In this specification (including the claims), the terms “Internet” and “Internet resource” are used as the terms. The former is an IP network, and the latter is data accessible via IP on the IP network ( Other resources (including files and directory listings). That is, in this specification, the term “Internet” is simply synonymous with an IP network. In addition to a so-called “Internet” that is used widely and publicly, an IP such as a so-called intranet closed within a company or other organization. The term “Internet resource”, including networks, is intended to refer to data accessible via IP on these networks. This is an unavoidable measure because an appropriate high-level term such as “IP network resource” is not common at present.
[0014]
FIG. 1 shows the configuration of a communication terminal having an IP telephone function and a WEB browser function employing the present invention. In FIG. 1, reference numeral 100 denotes an IP network to which the communication terminal 200 is connected (in addition to the so-called Internet, a closed network such as an intranet is also conceivable. ) Through the wired line 101. In the present embodiment, it is assumed that the wired line 101 is ADSL, and the line of the communication terminal in FIG. 1 is divided by the splitter 102 into the band 104 for the PSTN network and the band 103 for the ADSL network. Voice communication by PSTN connection (for example, telephone call and facsimile) is possible, Internet connection (ADSL connection method such as PPPoE is used), and use of resources on the Internet (in this embodiment, at least other than IP phone) Web page browsing, e-mail transmission / reception, etc.).
[0015]
The connection to the IP network 100 does not need to be ADSL, and any line medium such as an optical fiber line, a CATV line, or a wireless line can be used.
[0016]
The communication terminal 200 in FIG. 1 includes a display unit 214 using a liquid crystal display, an operation unit 215 including numeric keys and various function keys, and a handset 208 for voice call input / output. The display unit 214 and the operation unit 215 are used not only for call control but also for realizing a WEB browser function.
[0017]
The operation unit 215 is provided with a resource transfer button 215a and a reload button 215b. The resource transfer button 215a is pressed by the user in order to specify that Internet resources are shared and used during the IP phone call between the terminals. The reload button 215b is used for a forced mail reception operation (or a web page reload operation).
[0018]
FIG. 2 shows the configuration of the control system of communication terminal 200 in FIG. The illustrated control system realizes a facsimile function (not shown in FIG. 1) in addition to the IP telephone function and the WEB browser function in the communication terminal 200.
[0019]
In FIG. 2, the CPU 201 inputs a signal to each unit via the data bus 219 and controls each component connected to the data bus 219 according to the input signal. That is, the CPU 201 controls the whole in accordance with a program stored in the ROM 202, and executes processing by controlling connection to the network and various protocols. Of course, control used for operation, display, reading, and recording is also included.
[0020]
Furthermore, control over broadband connection, control for realizing IP phone, control for performing WEB access, browser control for displaying WEB page, IP address detection, extraction control, URL, etc. File creation and transmission / reception control for data transmission.
[0021]
The ROM 202 is a memory that stores a program, and includes a mask ROM, a flash ROM, or the like. It is also conceivable that a flash ROM or EEPROM is used for data that needs to be written and erased. The ROM 202 stores a program for general control performed by the CPU 201.
[0022]
A RAM 203 is a work area when the CPU 201 performs processing, and is also an area used for executing web browsing and e-mail transmission / reception processing including call processing, reading, recording, or processing of voice CODEC data. Here, unlike ROM 202, temporary data is stored.
[0023]
Further, the RAM 203 has a part backed up by a battery or the like, and stores setting contents of various service functions such as time data and contents registered in the address book (or telephone book). FIG. 1 shows the area of the address book 203a among such areas.
[0024]
The address book 203a includes a telephone number obtained by number notification during a normal line call, an IP address obtained during IP telephone communication, a user name and a mail address corresponding to the selection information. The user name and mail address of the user of the own device are stored based on a predetermined setting operation.
[0025]
The storage area for management information similar to this address book can also be configured by an EEPROM or the like as a nonvolatile memory.
[0026]
The RAM 203 is also used as a temporary storage of the IP address detected in the IP telephone connection procedure, a buffer for performing file transmission / reception, and a reception buffer for displaying a WEB page.
[0027]
The communication control unit 204 is an interface for accommodating an analog (PSTN) public line 104. In the case of an analog line, the communication control unit 204 is connected to a telephone line (hereinafter referred to as a subscriber line) of a central office switch, and a full wave by a diode. Consists of a rectifier circuit, a polarity matching circuit for matching the polarity of the line voltage, a ringer detection circuit that is connected to the subscriber line of the circuit exchange and detects the call signal from the exchange, and the line when an off-hook operation is performed While forming a loop, it comprises a pulse sending circuit for sending dial pulses to the station and a transformer circuit for performing 2-wire-4 wire conversion. Further, an interface 250 for an analog terminal connected to the outside is also provided so that a normal analog terminal can be connected.
[0028]
A MODEM unit 205 includes a DSP and an AFE (analog front end), and functionally realizes a function of a facsimile modem that transmits and receives a facsimile by G3 FAX under the control of the CPU 201. Furthermore, it has a number display function for analyzing modem data (number display data) and an echo canceller function, and can also realize a speakerphone function.
[0029]
The sound source unit 206 is a sound source of a holding tone or a ringing melody, has a sound source data generation function inside, and can be reproduced as an analog signal by the sound source unit 206 under the control of the CPU 201 based on data stored in the ROM 202 or the RAM 203. it can. It also serves as a sound source for outputting call progress stones such as pseudo DT, BT, RBT.
[0030]
Reference numeral 207 denotes an audio processing unit. Signals from the MODEM unit 205 and input / output signals of a handset 208, a speaker 209, a main body microphone 210, a communication control unit 204, and the like are input to the audio processing unit 207 under the control of the CPU 201. It is processed by voice path control.
[0031]
The handset 208 (FIG. 1) is used for voice input / output in a call on an ordinary line and an IP phone. ON / OFF of the hook of the handset 208 is detected by the hook detection unit 216, and the ON / OFF of the line is controlled according to the state of the hook.
[0032]
The speaker 209 is used to output a ring tone or stored voice data and to monitor a speakerphone call. The main body microphone 210 is used for voice input when realizing the speakerphone function.
[0033]
The recording unit 211 is a recording unit composed of known recording means such as a thermal type, thermal transfer type printer, laser beam printer, ink jet printer or the like, and in the case of facsimile recording, digital data encoded with MH, MR, MMR. Is decrypted and the decrypted data is recorded. Also, when printing data from a WEB browser, the RAM 203 is used as a reception buffer, and the data for one page of web described in the markup language (usually HTML) stored therein is converted into display data. The amount of data that can be displayed on one screen of the display unit 214 is stored in the display buffer in the RAM 203. When the WEB browser finishes storing in the display buffer, it notifies the recording unit 211 of the start of recording.
[0034]
Upon receiving the storage end notification, the recording unit 211 reads data from the display buffer, converts it into print data for each line, and transfers it to the recording unit 211. When the transfer is completed, a transfer completion notification is sent to the browser. Upon receiving the transfer end notification, the browser stores the next display data in the display buffer and notifies the recording unit 211, and notifies the end of the page when the data for the web page ends and there is no next display data. . By repeating the above processing, data for one page is transferred to the recording unit 211, and web printing is performed.
[0035]
The reading unit 212 includes known document reading means such as a CCD or a contact sensor array, converts analog data read by the reading means into digital data, and converts the converted digital data into MH in facsimile communication. , MR, MMR encoding and other known encoding methods and output.
[0036]
Reference numeral 213 denotes a sensor unit that detects the presence or size of a transmission document on the reading unit 212 and notifies the CPU 201 of the result. Further, the presence or size of the recording paper on the recording unit 211 is detected, and the result is notified to the CPU 201.
[0037]
The display unit 214 (FIG. 1) is composed of a liquid crystal component such as a color LCD or a monochrome LCD, and is used for displaying various information. Display processing of the display unit 214 includes display of HTML information received from a server on the Internet, display of time, display of the status of communication lines and errors, monitor display of other operation statuses, and key operation on the operation unit 215. This includes display of input text messages and received text messages, display of settings of various service functions of the telephone, and the like.
[0038]
The operation unit 215 (FIG. 1) includes a keyboard (or a pointing device such as a mouse) including a numeric keypad and function keys, and configures a user interface together with the display 214. All user operations relating to WEB browsing operation, printing, calling / calling / registration, etc. are accepted and the contents are notified to the control unit 201.
[0039]
The keys of the operation unit 215 include the following as well-known keys in addition to the resource transfer button 215a described above. That is, dial numbers, URLs, etc. 0-9 and *, #, and dial keys for inputting alphabets and symbols using the keys, transmission, reception keys for controlling facsimile transmission / reception, line ON / OFF There are off-hook keys to be controlled, other keys such as a hold key and a select key for setting functions.
[0040]
The network control unit 240 controls various protocols related to Internet communication. Although the network control unit 240 is shown as a circuit block for convenience, the basic control is actually performed by software of the CPU 201.
[0041]
The network control unit 240 controls input / output of a NIC (network interface card) 242 (multiple can be provided as shown) via a driver unit 241 (usually called PHY) using an MII interface, Controls the input / output of the ADSL modem unit 230.
[0042]
The NIC 242 may be based on an interface system (or other) such as CSMA / CD (Ethernet: trade name). The ADSL modem unit 230 is used for the communication using the ADSL. The NIC 242 is used to communicate with other devices connected to the LAN, but is not necessarily essential for the control described later.
[0043]
In network communication, input / output between the circuit blocks of FIG. 2 centering on the network control unit 240 is performed as follows.
[0044]
The IP telephone communication is, for example, ITU-T recommendation H.264. VoIP described in H.323. In VoIP, various protocols such as IP (Internet Protocol), UDP (User Datagram Protocol), RTP (Transport Protocol For Real-Time Application), and RSVP (Reuse Reservation Protocol) are used.
[0045]
In the case of an IP phone, a voice signal input from the handset 208 is processed through the voice processing unit 207, and the CODEC unit 243 executes codec processing for voice processing. 711 and G.G. Audio signals are transmitted and received as digital data through encoding / decoding based on a code format such as 729. In addition, in order to specify the IP address of the other party, SIP, ITU-T recommendation H.264, etc. A protocol such as H.323 or MCGP is used.
[0046]
In the present embodiment, communication with the Internet and communication with a LAN via the NIC 242 are performed, that is, packets are forwarded between different network segments. Therefore, it is desirable that the network control unit 240 is provided with a router function for transferring packets between different network segments and a NAT function for performing address / port number conversion.
[0047]
The NAT function converts a private IP address and an original global IP address that can be used for Internet access to each other so that the Internet can be transparently accessed from a node to which only a local IP address is assigned. .
[0048]
In addition, because the device is connected to the LAN, DHCP is also provided to dynamically assign an IP address at startup and collect the IP address at the end.
[0049]
When the ADSL modem unit 230 connects to the ADSL network, a protocol such as PPPoE is used. Since a protocol such as PAP / CHAP is used for authentication when connecting to the ADSL network, the network control unit 240 must also implement these authentication protocols.
[0050]
The network control unit 240 and the ADSL modem unit 230 are connected via an interface such as UTOPIA.
[0051]
The ADSL modem unit 230 is a communication control unit for use in Internet connection, and connects to a public line separated by a splitter. The ADSL modem unit 230 includes an AFE unit 231 and a BB-communication unit 232. Connected to the ADSL modem section 230 are a ROM 233 for storing an ADSL modem program and a RAM 234 for a data work area.
[0052]
FIG. 3 conceptually shows the configuration of the IP network. As shown in FIG. 3, the communication terminal 200 of this embodiment is connected to the IP network 100 via the public line 101 and communicates with the counterpart communication terminal 220.
[0053]
FIG. 3 assumes a state in which the communication terminal (A) 200 and the communication terminal (B) 220 are connected to the same Internet service provider (ISP).
[0054]
On the IP network 100, a SIP server 110 used for call connection by an IP phone, a location server 111 that manages a correspondence table of telephone numbers / IP addresses, and a correspondence table of IP addresses and domain / host names are managed. A DNS server 112 and a WEB server 113 are provided.
[0055]
4 shows a configuration equivalent to that of FIG. 3, but shows a state where the IP network 100 is connected via different Internet service providers (ISPs 151, 153). As a form of Internet connection, depending on the communication partner, the connection form of either FIG. 3 or FIG. 4 can be used. In FIG. 4, the communication terminal (A) 200 is connected via the ISP (A) 151, and the communication terminal (B) 220 is connected via the ISP (B) 153.
[0056]
In the case of FIG. 4, the ISP-GW 152 for connecting different service providers performs a gateway function between different ISPs, thereby enabling communication between the communication terminals 200 and 220. Note that the ISP-GW 152 is not necessarily configured by a single device, and may be configured by a plurality of gateway devices.
[0057]
In the IP telephone communication of this embodiment, the SIP system is used. Here, assuming that the calling side is the communication terminal 200 and the called side is the communication terminal 220, in SIP, the calling communication terminal 200 first sends a call message to the SIP server 110 to establish a connection with the partner terminal 220. Request. The SIP server 110 inquires of the location server 111 about the IP address of the counterpart terminal 220, and an IP connection between the communication terminals 200 and 220 is formed using the found IP address.
[0058]
Next, communication control for sharing Internet resources between communication terminals having a call using an IP phone in the above configuration will be described.
[0059]
5 and 6 show the state of IP telephone communication in this embodiment. In the IP telephone communication according to the present embodiment, a call is connected from a communication terminal A (200) configured as shown in FIGS. 1 and 2 to a communication terminal B (220) to make a call. Further, in the present embodiment, WEB browsing is performed at the terminal A, and the URL data is transferred from the communication terminal A to the communication terminal B during IP telephone communication, so that the communication terminals (hereinafter also simply referred to as “terminals”) A and B Can share the same WEB information. The illustrated communication procedure is realized by the CPU 201 in FIG. 1 executing a communication control program. The communication control program of the CPU 201 is stored in the ROM 202 (or other storage medium).
[0060]
In the following description, the call direction between terminals is A to B, and the transfer direction of WEB data is also A to B. However, these call direction and transfer direction of WEB data are examples. It is only optional.
[0061]
First, terminal A performs an IP telephone call operation. The IP telephone call connection process is performed using the SIP server 110 by the dial operation of the terminal A (S801 in FIG. 5). As described above, the SIP server 110 calls the partner terminal and returns an IP address corresponding to the telephone number of the partner terminal to the terminal A (S802). The terminal A enters the calling state and waits for the partner terminal to respond (S803). When the partner terminal responds, a call state is established (S804).
[0062]
The terminal A activates a browser to display the WEB page (S805). When the URL is input to the browser of the terminal A, the terminal A inquires the DNS server 112 about the address of the WEB server 113 designated by the URL, and receives the search result (S806). The terminal A accesses the WEB server 113 based on the IP address obtained from the DNS server 112, receives the data of the WEB page (S807), and displays the WEB page on the browser (S808).
[0063]
In this embodiment, the terminal A obtains from the SIP server 110 the source IP address of the TCP packet to be transmitted during HTTP access, as will be described later, in order to transmit the WEB page displayed by the terminal A to the partner terminal. By using the IP address of the partner terminal, the data request is made from the terminal A, but the WEB data is controlled to be transmitted to the partner terminal B.
[0064]
That is, the terminal A accesses the WEB server 113 again in order to transmit the WEB page displayed by the terminal A to the partner terminal (S809). At this time, the response of the WEB server 113 is transmitted to the terminal B by using the IP address of the partner terminal obtained from the SIP server as the source IP address when the WEB data is requested to the WEB server.
[0065]
The terminal A that has finished browsing the browser ends the browser (S815 in FIG. 6), and disconnects the call when the call with the partner terminal is completed (S816). Alternatively, the call is terminated when disconnection from the partner terminal is detected.
[0066]
On the other hand, the processing on the terminal B side is performed as follows.
[0067]
Terminal B monitors whether there is an incoming call in the standby state (S810 in FIG. 5). When the incoming call is detected, the terminal B responds to the incoming call (S811) and enters a call state (S804).
[0068]
During the call, the terminal B monitors reception from the WEB server (S812). Since the terminal A accesses the WEB server 113 as described above (S809), the WEB data requested by the terminal A is transmitted from the WEB server 113 to the terminal B. When data is received from the WEB server, terminal B analyzes the received data. If the received data is WEB data, if the browser is not activated, the browser is activated (S813), and the WEB page is displayed (S814).
[0069]
When browsing the browser is completed, the terminal B terminates the browser (S817 in FIG. 6). Further, the communication state with the other party is monitored (S818), and when it is detected that the other party has been disconnected, the call is terminated (S819). Alternatively, the call is disconnected from the own terminal.
[0070]
7 and 8 show an outline of the above IP telephone communication sequence. The sequence of FIGS. 7 and 8 corresponds to the communication control of FIGS. 5 to 6 and is realized by the CPU 201 of FIG. 1 executing the communication control program as described above. 9 to 11 show the configuration of each HTTP packet used in the sequences of FIGS. 7 and 8.
[0071]
Steps (sequence) numbers of the numbers S1000 and S1200 are used in the sequences of FIGS. 7 to 8, and reference numbers of the numbers 2000 are used in FIGS. 9 to 11. In the following description, the correspondence between the steps in each figure and the TCP packet (or its internal configuration) is shown in the format of “(S12xxx · 2xxx)”.
[0072]
7 and 8, the servers such as the above-described SIP server, location server, and DNS server provided by the ISPs of the terminals A and B are shown as ISP servers 1002 and 1003 for simplification. .
[0073]
Before describing the sequences of FIGS. 7 and 8, the structure of the TCP packet will be described with reference to FIG. The packets shown in FIGS. 10 and 11 have the structure shown in FIG. FIG. 9 shows a general configuration of a packet used in TCP / IP. As shown in the figure, a TCP / IP packet includes an IP header portion 2001 and an IP data portion 2002. The IP header portion 2001 describes a source IP address 2008, a destination IP address 2009, and the like.
[0074]
The IP data portion 2002 further includes a TCP header portion 2003 and a TCP data portion 2004. The TCP header portion 2003 describes a source port number 2005, a destination port number 2006, a control flag 2007 indicating the TCP packet type, and the like. Is done.
[0075]
Hereinafter, the sequence of FIGS. 7 and 8 will be described.
[0076]
First, the terminal A performs a dial operation from the operation unit 215. Accordingly, the terminal A (200) is connected to the ISP server 1002 of the terminal A (S1005 in FIG. 7). The ISP server 1002 of the terminal A (actually, the SIP, DNS server, etc. operate as described above) searches for the IP address of the terminal B (200) that is the call partner (S1006), and for the IP address of the search result The call packet is transmitted (S1007).
[0077]
When this call packet is received, the ISP server 1003 of the terminal B (actually the SIP, DNS server, etc. operate as described above) calls the terminal B (220) (S1008). When the terminal B responds (S1009), the ISP server 1003 of the terminal B returns a connection packet to the ISP server 1002 of the terminal A (S1010). When the ISP server 1002 of the terminal A returns a response to the terminal A 1001, the call connection is completed, and at this time, the IP address of the terminal B is notified to the terminal A (S1011). Thereafter, the terminal A and the terminal B are in a call state, and voice packets are exchanged (S1012). This IP telephone communication is usually performed on a UDP basis including a message with an emphasis on real-time characteristics. However, a call connection method such as TCP-based H323 can also be used, and the IP telephone communication method is arbitrary.
[0078]
Next, a sequence when the terminal A shares the WEB data obtained from the WEB server 113 with the terminal B will be described with reference to FIG. In FIG. 8, although the terminal A is shown as the terminal A-1 and the terminal A-2, these two displays correspond to two ports for data transmission / reception. In TCP / IP, when a series of flow from the synchronization with the other party to the end of the role is completed, a different port number is used next. The terminal B operating as an HTTP client can also use a plurality of ports, but only one is used in the HTTP communication of this embodiment.
[0079]
The terminal A synchronizes with the data port 1201 and the WEB server in order to display the WEB page on its own terminal. The terminal A transmits a SYN packet to the WEB server (S1205 · 2205), and receives a SYN · ACK packet from the WEB server (S1206 · 2206). In response to this, the terminal A returns an ACK packet (S1207 and 2207). As a result, the port 1201 of the terminal A and the WEB server can perform HTTP communication.
[0080]
The terminal A requests a WEB page from the WEB server (S1208 and 2208), and receives WEB data (S1209 and 2209). In response to this, the terminal A returns an ACK packet (S1210 and 2210), and displays the received WEB page (S1211).
[0081]
Terminal A performs WEB access again in order to display the WEB page on terminal B as well. Subsequent operations are started by operating the resource transfer button 215a of the operation unit 215 at the terminal A. The resource transfer button 215a is pressed every time when the other party wants to display the same WEB page. In addition, when the resource transfer button 215a is pressed, the resource transfer button 215a enters the Internet resource sharing mode in which the Internet resource sharing operation described later is always performed. You may make it enter. In addition, after starting the IP telephone call, the Internet resource sharing mode may be automatically entered.
[0082]
The following Internet resource sharing (browsing of the same WEB page in the present embodiment) can be automatically executed each time a new WEB page is read by the terminal A.
[0083]
First, the terminal A synchronizes the data port 1202 and the WEB server. The port number used at this time is one that can be used by the terminal B. The terminal A transmits a SYN packet to the WEB server (S1212, 2212), and receives a SYN / ACK packet from the WEB server (S1213 and 2213). In response to this, the terminal A returns an ACK packet (S1214 and 2214). As a result, the port 1202 of the terminal A and the WEB server can perform HTTP communication.
[0084]
Further, the terminal A requests a WEB page from the WEB server. At this time, the IP address of the terminal B is put in the source address of the IP header (S1215 and 2215). In response to this request, the WEB server transmits the data of the WEB page to the IP address of the request source (S1216 and 2216). The terminal B that has received the WEB data returns an ACK packet to the WEB server (S1217 and 2217), and the terminal B displays the WEB page (S1218).
[0085]
In the present embodiment, the browser of terminal B (or the TCP / IP stack of the operating system in which the browser is operating) that receives the WEB page transmitted by rewriting the source address of the packet is self- It is necessary to receive WEB data not requested by, and to display (or output in another format). For this reason, during IP telephone communication, the operating system of the terminal B (or A: WEB data receiving side) performs the WEB data transmitted to the own device to start the browser (if necessary). ) Need to be controlled to be sent to.
[0086]
As described above, Internet resources can be shared between terminals that are talking on IP phones. Unlike the conventional transmission of Internet resources by voice during IP telephone communication, information on the Internet resources themselves is correctly transmitted to each other, so that the same Internet resources can be used reliably, and operations such as re-input of URL and other data are omitted. Therefore, operability can be improved.
[0087]
As a result, the same Internet resource is used between terminals communicating during IP telephone communication (displayed in the case of the above embodiment, but the method of using the shared Internet resource as in the case of firmware update below is Unlike the conventional transmission of Internet resources by voice during IP telephone communication, the information of Internet resources is correctly transmitted to each other, and the same Internet resources can be used reliably. Since operations such as data re-input such as URL can be omitted, operability can be improved.
[0088]
Also, in the above embodiment, when accessing a WEB page shared with the partner terminal, the transmission source IP address is rewritten and control is performed so that the target WEB page is transmitted directly to the partner terminal from the WEB server. The number of steps in the sequence is very small compared to communication control in which the target WEB page data itself or its URL data is transmitted to the other terminal, and high-speed and efficient communication can be performed. In particular, the WEB data receiving side can automatically browse the Internet resource indicated by the URL without requiring any special operation.
[0089]
In the above description, the WEB page is considered as an Internet resource shared by the first and second terminals during IP telephone communication. However, an information format indicating the location of the URL (or URI) or the equivalent Internet resource (sent by FTP) Any Internet resource that can be expressed by the first and second terminals can be shared. Internet resources that can be shared according to the present invention are FTP directories, files in the directories, Gopher pages, audio and video (still image / video) streams as long as they can be used on a browser basis (or can be expressed in URL format). There are no limit to the number of services offered.
[0090]
The Internet resource sharing technology of the present invention can be widely used for information sharing for business and entertainment. In particular, it is considered useful for product development of the communication device of the present invention to be used for updating the firmware of the communication terminal of the present invention. For example, if the user of the communication terminal of the present invention encounters a trouble, calls the manufacturer's support window with an IP phone, and as a result of consultation, the conclusion that the firmware of the communication terminal needs to be updated is reached. The personnel directly sends the URL of the firmware (for example, a file that can be acquired by HTTP or FTP, which is normally provided from an HTTP server / FTP server operated by the manufacturer) to the user's communication terminal, and updates the firmware. be able to. Using the software installation function installed in many browsers, the handling of files on the receiving side, such as firmware updates, can be specified arbitrarily. Updates can be made.
[0091]
The software that realizes the present invention can be applied to any type of communication terminal that connects to an IP network and makes a call using a predetermined IP telephone system, and is stored in a ROM or other storage medium as a CPU program of the communication terminal. In addition to storing in advance, it can be supplied via an external storage medium (CD-ROM, flexible disk, MO, etc.) or via a network. In particular, when supplying via a network, as described above, it is arranged as firmware (or additional software) of a communication terminal on an FTP server or HTTP server as an Internet resource, and the communication terminal via the communication method of the present invention. Can be automatically installed on the communication terminal using a software installation function or the like installed in many WEB browsers.
[0092]
In the above, the source IP address is rewritten and control is performed so that the target WEB page is transmitted directly from the WEB server to the partner terminal, so that the same Internet resource can be shared and used by the terminals in a call. Although shown, the configuration for sharing and using Internet resources is not limited to this, and the URL information of the target Internet resource is transferred to the partner terminal by FTP or HTTP protocol, or the downloaded Internet resource data itself is used. It goes without saying that such shared use is also possible by transferring. In order to transfer these information to the other party's terminal, since the other party's IP address is known by the IP telephone procedure, the other party's IP address can be changed by operating the above resource transfer button or setting the Internet resource sharing mode. Since the FTP or HTTP connection can be established during the period, the URL information of the Internet resource and the data itself can be easily transferred through such a connection.
[0093]
In addition, the Internet resource sharing operation can be performed very easily by operating the resource transfer button, or the Internet resource sharing mode can be set (by entering the resource transfer button explicitly, or entering the mode By automatically entering the mode after the call is started, a troublesome operation can be further omitted, and an Internet resource sharing operation can be easily performed without selecting a user.
[0094]
The IP address of the partner required for the Internet resource sharing operation can be obtained by the IP telephone procedure without requiring special hardware or software.
[0095]
Embodiments of the present invention include the following.
[0096]
<Embodiment 1> In a communication terminal connected to an IP network and performing a call by a predetermined IP telephone system,
By accessing the server that provides the target Internet resource and changing the source address of the packet to be transmitted at that time to the IP address of the communication partner communication terminal, the response packet of the server is transmitted to the communication terminal communication partner A communication terminal comprising Internet resource sharing means for sharing and using the same Internet resource as the communication terminal of the other party of communication by controlling in this way.
[0097]
<Embodiment 2> The communication terminal according to Embodiment 1, wherein the Internet resource is WEB data, and the server is an HTTP server that provides WEB data.
[0098]
<Third Embodiment> The communication terminal according to the first embodiment, wherein an IP address of the communication terminal of the other party is acquired by a call connection procedure of an IP phone.
[0099]
<Embodiment 4> The communication terminal according to Embodiment 1, further comprising operation means for designating shared use of the Internet resource.
[0100]
<Embodiment 5> The communication terminal according to Embodiment 1, wherein the Internet resource sharing operation is performed every time the operation means is operated.
[0101]
<Embodiment 6> During an IP phone call, an Internet resource sharing mode for performing an operation of sharing the Internet resource with the communication terminal of the other party is set whenever the Internet resource being used by the own device is changed. The communication terminal according to Embodiment 1, which is characterized.
[0102]
<Embodiment 7> In a method for controlling a communication terminal connected to an IP network and making a call by a predetermined IP telephone system,
By accessing the server that provides the target Internet resource and changing the source address of the packet to be transmitted at that time to the IP address of the communication partner communication terminal, the response packet of the server is transmitted to the communication terminal communication partner By controlling as described above, the same Internet resource as that of the communication terminal of the communication partner is shared and used.
[0103]
<Embodiment 8> The communication terminal control method according to Embodiment 7, wherein the Internet resource is WEB data, and the server is an HTTP server that provides WEB data.
[0104]
<Embodiment 9> The communication terminal control method according to Embodiment 7, wherein the IP address of the communication terminal of the other party is acquired by a call connection procedure of an IP phone.
[0105]
<Embodiment 10> The method for controlling a communication terminal according to embodiment 7, wherein shared use of the Internet resource is designated by a user operation of a predetermined operation means.
[0106]
<Embodiment 11> The method for controlling a communication terminal according to embodiment 7, wherein the Internet resource sharing operation is performed every time the operation means is operated.
[0107]
<Twelfth Embodiment> During an IP phone call, an Internet resource sharing mode for performing a sharing operation with a communication terminal of a call partner of the Internet resource is set every time an Internet resource used by the own device is changed. The control method of the communication terminal according to Embodiment 7, which is characterized.
[0108]
<Embodiment 13> In a control program for a communication terminal connected to an IP network and performing a call by a predetermined IP telephone system,
By accessing the server that provides the target Internet resource and changing the source address of the packet to be transmitted at that time to the IP address of the communication partner communication terminal, the response packet of the server is transmitted to the communication terminal communication partner A control program for a communication terminal, comprising a control process for sharing and using the same Internet resource as the communication terminal of the other party of the call by controlling in such a manner.
[0109]
<Embodiment 14> The communication terminal control program according to embodiment 13, wherein the Internet resource is WEB data, and the server is an HTTP server that provides WEB data.
[0110]
<Fifteenth embodiment> The communication terminal control program according to the thirteenth embodiment, including a control process for acquiring an IP address of the communication terminal of the communication partner by an IP telephone call connection procedure.
[0111]
<Embodiment 16> The communication terminal control program according to embodiment 13, including a control process for performing the shared use operation of the Internet resource in response to a user operation of a predetermined operation means.
[0112]
<Embodiment 17> The communication terminal control program according to embodiment 13, comprising a control process for performing the Internet resource sharing operation each time the operation means is operated.
[0113]
<Embodiment 18> Control for setting an Internet resource sharing mode for performing an operation of sharing an Internet resource with a communication partner of the other party during an IP phone call whenever an Internet resource used by the own device is changed The communication terminal control program according to claim 13, including a process.
[0114]
【The invention's effect】
As is apparent from the above description, according to the present invention, a communication terminal that connects to an IP network and makes a call by a predetermined IP telephone system accesses a server that provides a target Internet resource and transmits it at that time. By changing the packet source address to the IP address of the communication terminal of the other party, and controlling the response packet of the server to be transmitted to the communication terminal of the other party, the same Internet as the communication terminal of the other party Unlike the conventional transmission of Internet resources using voice, the configuration that uses resources in common can be used to transmit Internet resources correctly, ensure that the same Internet resources can be used, and re-enter data such as URLs. There is an excellent effect that operations such as can be omitted. That is, according to the present invention, it is possible to easily and inexpensively share an Internet resource with a partner who is talking on an IP phone by using only a communication terminal without using other devices, and without having to perform a troublesome operation. An effect is obtained.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of a communication terminal employing the present invention.
FIG. 2 is a block diagram showing a configuration of a control system of the apparatus of FIG.
FIG. 3 is an explanatory diagram showing a communication environment configured by an IP network with which the apparatus of FIG. 1 communicates.
4 is an explanatory diagram showing a different configuration of a communication environment in which the apparatus of FIG. 1 communicates.
FIG. 5 is a flowchart showing a communication control procedure of IP telephone communication by the apparatus of FIG. 1;
6 is a flowchart showing a communication control procedure of IP telephone communication by the apparatus of FIG. 1. FIG.
7 is an explanatory diagram showing a state of IP telephone communication by the apparatus of FIG. 1. FIG.
FIG. 8 is an explanatory diagram showing a state of IP telephone communication by the apparatus of FIG. 1;
FIG. 9 is an explanatory diagram showing a configuration of a TCP packet used in the present invention.
FIG. 10 is an explanatory diagram showing a configuration of a TCP packet used in the present invention.
FIG. 11 is an explanatory diagram showing a configuration of a TCP packet used in the present invention.
[Explanation of symbols]
100 IP network
101 Wired line
102 Splitter
104 Public line
110 SIP server
111 Location server
112 DNS server
113 WEB server
200 Communication terminal
201 CPU
202 ROM
203 RAM
204 Communication control unit
205 MODEM
206 Sound generator
207 Audio processing unit
208 handsets
209 Speaker
210 Body microphone
211 Recording unit
212 Reading unit
214 Display
215 Operation unit
216 hook detector
219 data bus
230 ADSL modem section
231 AFE section
232 BB-Communication Department
233 ROM
234 RAM
240 Network controller
241 Driver part

Claims (18)

In a communication terminal that connects to an IP network and makes a call using a predetermined IP telephone system,
Display control means for accessing a server that provides a target Internet resource, receiving the target Internet resource, and displaying it on a display means;
In order to transmit the target Internet resource displayed on the display means by the display control means, the server is accessed, and the source address of the packet to be transmitted at that time is changed to the IP address of the communication terminal of the communication partner. A communication terminal comprising Internet resource sharing means for sharing and using the same Internet resource as a communication partner communication terminal by controlling a server response packet to be transmitted to the communication partner communication terminal.   2. The communication terminal according to claim 1, wherein the Internet resource is WEB data, and the server is an HTTP server that provides WEB data.   2. The communication terminal according to claim 1, wherein an IP address of the communication terminal of the other party is acquired by a call connection procedure of an IP phone.   The communication terminal according to claim 1, further comprising an operation unit that designates shared use of the Internet resource. The communication terminal according to claim 4 , wherein the Internet resource sharing operation is performed each time the operation unit is operated.   The Internet resource sharing mode is set, in which an Internet resource sharing operation with a communication terminal of a communication partner of the Internet resource is set every time an Internet resource being used by the own device is changed during an IP phone call. The communication terminal according to 1. In a control method for a communication terminal connected to an IP network and performing a call by a predetermined IP telephone system,
A display control step of accessing a server that provides a target Internet resource, receiving the target Internet resource, and displaying it on a display means;
In order to transmit the target Internet resource displayed on the display means by the display control means, the server is accessed, and the source address of the packet to be transmitted at that time is changed to the IP address of the communication terminal of the communication partner. A communication terminal control method comprising a sharing step of sharing and using the same Internet resource as a communication partner communication terminal by controlling a server response packet to be transmitted to the communication partner communication terminal.   8. The communication terminal control method according to claim 7, wherein the Internet resource is WEB data, and the server is an HTTP server that provides WEB data.   8. The communication terminal control method according to claim 7, wherein an IP address of the communication partner communication terminal is acquired by a call connection procedure of an IP telephone.   8. The method of controlling a communication terminal according to claim 7, wherein shared use of the Internet resource is designated by a user operation of a predetermined operation means. 11. The communication terminal control method according to claim 10 , wherein the Internet resource sharing operation is performed each time the operation unit is operated.   The Internet resource sharing mode is set, in which an Internet resource sharing operation with a communication terminal of a communication partner of the Internet resource is set every time an Internet resource being used by the own device is changed during an IP phone call. The communication terminal control method according to claim 7. In a control program for a communication terminal that connects to an IP network and makes a call using a predetermined IP telephone system,
A display control process of accessing a server that provides a target Internet resource, receiving the target Internet resource, and displaying it on a display means;
In order to transmit the target Internet resource displayed on the display unit by the display control unit , the server is accessed, and the source address of the packet transmitted at that time is changed to the IP address of the communication terminal of the other party. A communication terminal characterized by including a control process for sharing and using the same Internet resource as the communication terminal of the communication partner by controlling the response packet of the server to be transmitted to the communication terminal of the communication partner. Control program.   14. The communication terminal control program according to claim 13, wherein the Internet resource is WEB data, and the server is an HTTP server that provides WEB data.   14. The control program for a communication terminal according to claim 13, further comprising a control process for acquiring an IP address of the communication terminal of the other party by an IP telephone call connection procedure.   14. The communication terminal control program according to claim 13, further comprising a control process for performing the shared use operation of the Internet resource in accordance with a user operation of a predetermined operation means. 17. The communication terminal control program according to claim 16 , further comprising a control process for performing the Internet resource sharing operation every time the operation means is operated.   It includes a control process for setting an Internet resource sharing mode for performing an operation of sharing an Internet resource with a communication terminal of the other party during an IP phone call when the Internet resource being used by the own device is changed. 14. The communication terminal control program according to claim 13,

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