CN1426220A - Wireless telephone of internet - Google Patents

Abstract

The present invention proposes an Internet cordless phone that enables multiple users to make wireless Internet calls through Internet lines at the same time. The proposed Internet cordless telephone comprises an Internet telephone station and a cordless telephone handset. Internet telephony stations are used to handle Internet telephony protocols. A cordless telephone handset is used to process the encoded audio data and user interface, wherein the Internet telephone station and the cordless telephone handset are connected by an asynchronous connectionless (ACL) link. By utilizing the provided Internet cordless phone, up to seven people can make Internet calls through one Internet line, thus reducing the cost of making calls and overcoming mobility limitations.

Description

Internet cordless phone

Background of the invention

1. Field of invention

The present invention relates to a method and apparatus for making a call via the Internet, and more particularly to an Internet cordless telephone to be connected via a Bluetooth wireless connection to a cordless telephone station and a cordless telephone handset, the cordless telephone station being connected to the Internet.

2. Description of related technologies

Conventional Internet telephony that connects calls through the Internet includes the following three types.

The first traditional Internet telephony consisted of a single entity, just like a normal telephone. In this case, up to two people can make calls at the same time and the Internet phone cannot be used remotely like a normal phone.

The second type of conventional Internet telephony uses a gateway device for connecting multiple telephones so that multiple people can connect calls through the Internet at the same time. However, such Internet telephony is inconvenient to use because the telephone has to be connected to the gateway device via a telephone line.

A third conventional Internet phone provides a cordless phone function by utilizing a cordless phone handset and a Bluetooth access point according to the Bluetooth standard. Methods for implementing the cordless phone functionality include a cordless phone profiling method and a LAN access profiling method. Here, the cordless phone profiling method limits the number of users who are simultaneously connected to a call. LAN access profiling assigns a valid Internet Protocol (IP) address to each cordless handset so that each cordless handset can connect calls to the outside; however, each cordless handset cannot receive phone calls from the outside.

Brief description of the invention

In order to solve the above-mentioned problems, an object of the present invention is to propose such a method by allowing each of a maximum of seven cordless telephone handsets to establish a wireless Communication of packet-type audio data data with the associated cordless telephone handset allows up to seven people to make calls simultaneously through an Internet line, while removing the occupied area restrictions of traditional Internet telephony.

For the purposes of the present invention, an Internet phone includes a communication processing and system control unit, a memory unit, a real time clock (RTC) unit, a Bluetooth radio frequency (RF) transceiver unit, and an Internet connection unit. The communication processing and system control unit converts the user's audio packet into Internet Protocol (IP) data according to the Internet telephony protocol, and extracts the audio packet from the IP data transmitted by the other party, and wirelessly transmits the data to the handset of the cordless phone and from the cordless Data is received in the handset of the telephone. The memory unit stores programs and data to be executed in the communication processing and system control unit. The real-time clock unit generates date and time to transmit data to the communication processing and system control unit, and establishes date and time data according to commands from the communication processing and system control unit. A Bluetooth radio frequency (RF) transceiver unit transmits audio packets output from the communication processing and system control unit to the cordless telephone handset and transmits audio packets from the cordless telephone handset to the communication processing and system control unit. An Internet connection unit connected to the Internet transmits audio packets from the handset of the cordless telephone according to the Telephony over Internet protocol and receives Telephony over Internet protocol data from the other side.

To accomplish the object of the present invention, a cordless telephone handset for Internet telephony includes a communication processing and handset control unit, a user input unit, a screen display unit, a memory unit, an audio processing unit, and a bluetooth RF transceiver unit. The communication processing and handset control unit handles the communication with the Internet telephone station required during the wireless exchange of data and controls each functional unit. The user input unit receives commands from the user and transmits the commands to the communication processing and handset control unit. The screen display unit displays messages entered by the user as well as messages about the condition of the handset. The memory unit stores programs to be executed in the communication processing and handset control unit as well as telephone numbers. The audio processing unit converts digital audio data transmitted from the communication processing and handset control unit into analog signals for output to the speaker, and converts the audio signal from the loudspeaker into digital audio to be transmitted to the communication processing and handset control unit data. The Bluetooth RF transceiver unit transmits audio packets from the communication processing and handset control unit to the Internet telephony station and receives audio packets from the Internet telephony station for transmission to the communication processing and handset control unit.

For the purposes of the present invention, an Internet cordless telephone includes an Internet telephone station and a cordless telephone handset. An Internet telephone station connected to the Internet receives data transmitted by the international standard H.323 method or the SIP method. The cordless handset compresses the audio packets from the user according to the international standard G.723.1 or G.729 to transmit them to the Internet telephony station over the Bluetooth ACL link.

To accomplish the purpose of the present invention, a method for connecting a call signal of a cordless telephone handset to generate an Internet call is proposed, the method comprising establishing an ACL link with an Internet telephone station; receiving the Internet telephone number of the other party; The established ACL connection is used to transmit the establishment message required to establish the call, which corresponds to the received Internet telephone number; the message requesting the call connection from the Internet telephony station is transmitted to the other party on the Internet, and the Internet telephony station has Receive the setup message; receive the call processing message from the Internet telephone station through the established ACL link after transmitting the message request call connection; receive the alarm processing message from the other party through the Internet telephone station and pass the established ACL chain to receive an alert message from an Internet telephone station; to receive a connection message from an Internet telephone station through an ACL link according to a call connection implemented by an Internet telephone station on the Internet; and to pass through the ACL link when the connection message is received. to transmit the connection confirmation message to the Internet telephony station.

To accomplish the object of the present invention, the present invention proposes a method for connecting a receiving signal of a cordless telephone handset to receive an Internet call, the method comprising receiving a message requesting a call connection from an Internet telephone station; when the received message requesting a call When the connection corresponds to a cordless telephone handset, establishes an ACL link with the Internet telephony station; receives from the Internet telephony station, via the established ACL link, the setup message required to establish the call, which the Internet telephony station has received from the other party Call connection message; transmits alarm message to Internet telephony station via established ACL link according to received setup message and transmits alarm handling message from internet telephony station to the other party; internet telephony station according to transmitted alarm handling message The connection message is transmitted to the Internet telephony station through the established ACL link, and the call connection completion message is transmitted from the Internet telephony station to the other party, wherein the Internet telephony station has received the connection message; and received at the Internet telephony station After the call connection complete message, a connection confirmation message is received from the Internet telephone station through the established ACL link to establish a call channel.

In order to achieve the purpose of the present invention, a data structure is provided, which is used to transmit compressed audio data over an ACL link and consists of a message type field and an optional field corresponding to the protocol identifier field value and the message type field value. A variable length transport data field is formed, wherein the variable length transport data field conveys the compressed audio data in case the protocol identifier field stores data representing the transmission of the compressed audio data through the ACL link.

In order to achieve the purpose of the present invention, a data structure used when transmitting compressed audio data through an ACL link is provided, the data structure includes a protocol identifier field, indicating that the data to be transmitted is compressed audio data; a message type field indicating the use status of the flow control function and the status of compressed audio data or reception of compressed audio data in the case where the protocol identifier field stores data representing the transmission of compressed audio data ; and a variable-length transport data field for storing compressed audio data corresponding to the protocol identifier field and the message type field.

In order to achieve the object of the present invention, a computer-readable recording medium for executing the method by a computer is provided.

Brief description of the drawings

By describing in detail its preferred embodiments with reference to the accompanying drawings, the above objects and advantages of the present invention will become apparent:

1 is a block diagram of an Internet cordless telephone according to the present invention;

Fig. 2 is the structural block diagram of the Internet telephone station of Internet cordless telephone according to the present invention;

Figure 3 is a detailed block diagram of an Internet telephony station according to the present invention;

Figure 4A provides a software protocol group, which is located in the read-only memory of the communication processing and system control unit;

Figure 4b shows a software protocol suite located in the communication processing and system control unit, which is used when communicating with a portable phone with a bluetooth interface;

Figure 5 is a block diagram of a cordless telephone handset of an Internet cordless telephone according to the present invention;

Figure 6 is a detailed block diagram of a cordless telephone handset in accordance with the present invention;

Figure 7 shows a software protocol suite located in the read-only memory of the communication processing and handset control unit;

FIG. 8 shows an example of call signal connection processing for Internet calls utilizing a cordless telephone handset according to the present invention;

Fig. 9 shows an example of connection processing for receiving a reception signal from an external Internet call using the handset of the cordless telephone according to the present invention;

Figure 10 shows a call release process for ending a phone call; and

11A to 11C show data structures of packets used in an asynchronous connectionless (ACL) link

Detailed description of the invention

The present invention will now be further fully described with reference to the accompanying drawings, in which preferred embodiments of the invention are shown.

FIG. 1 is a block diagram of an embodiment of an Internet cordless telephone according to the present invention. Referring to FIG. 1 , the Internet cordless telephone is composed of an Internet telephone station 100 and a cordless telephone handset 110 .

FIG. 2 is a block diagram of an embodiment of an Internet telephone station 100 in an Internet cordless telephone according to the present invention. Referring to FIG. 2, the Internet telephony station 100 is a fixed-location device and includes a communication processing and system control unit 210, a storage unit 220, a real-time clock (RTC) unit 230, a Bluetooth radio frequency (RF) transceiver unit 240 , an Internet connection unit 250 , and a compressed audio signal conversion unit 260 . The Internet Telephony Station 100 transmits and receives encoded audio data and user interface data by establishing and disconnecting calls from up to seven cordless telephone handsets wirelessly connected via Bluetooth, and by utilizing an Asynchronous Digital Subscriber Line (ADSL) modem or An Ethernet connection module to handle the Internet telephony protocol.

Figure 5 is a block diagram of a cordless telephone handset for an Internet cordless telephone in accordance with the present invention. 5, the cordless telephone handset 110 includes a communication processing and handset control unit 510, a user input unit 520, a screen display unit 530, a storage unit 540, an audio processing unit 550, and a bluetooth RF transceiver unit 560. Here, the cordless phone handset 110 having an audio codec function and a user interface function establishes and disconnects a call according to the Internet phone station 100 wirelessly linked via Bluetooth to transmit and receive encoded audio data and user interface data. Therefore, the user can make a call by using the handset 110 of the cordless telephone as by making a call by using a general cordless telephone.

The communication processing and system control unit 210 is composed of a high-speed processor module operated by a program, a Bluetooth RF transceiver interface module, a Bluetooth baseband processing module, a memory control module, and a multipurpose input/output unit. Here, the communication processing and system control unit 210 handles the Internet telephony protocol and handles communication with a cordless telephone handset for exchanging wireless data.

The Internet telephony protocol is handled according to the international standard H.323 method or the Session Initiation Protocol (SIP) method. The communication process with the handset of the cordless telephone to exchange cordless data is performed through an asynchronous connectionless (ACL) link, which establishes a wireless connection between a master and seven slaves according to the Bluetooth standard.

The bluetooth system has defined two kinds of connections, namely synchronous connection-oriented (SCO) link and ACL link, in order to provide multimedia application services. The SCO link operates symmetrically and supports peer-to-peer communication, the SCO link is used for general audio calls while utilizing a circuit switching method to transmit SCO link data. Such a link has two consecutive time slices, ie a forward time slice and a return time slice, with a specific time interval.

The ACL link operates symmetrically or asymmetrically and supports point-to-multipoint communication, the ACL link is used to transmit group data while transmitting the ACL link data through a packet conversion method. The host uses a polling method to control ACL communication.

In addition, the master exchanges call setup and disconnection messages, audio encoding data, and user interface data with the corresponding cordless handsets of the slaves over the ACL link. Each cordless telephone handset is identified according to a predetermined Internet telephone number.

Here, the Internet phone number may consist of a 4-byte Internet Protocol address for the station and an identification (ID) number for the handset of the cordless telephone. For example, when the identification number of a particular telephone handset is 2 and the Internet protocol address of the Internet telephone station is 218.34.52.219, the Internet telephone number of the telephone handset becomes 218.34.52.219.2. In addition, a telephone handset can have another number, which is composed of an identification number # or @, a telephone number, and an ID number. For example, another Internet phone number for a telephone handset could be set to #042-828-6043-1.

In addition, the communication processing and system control unit 210 receives date and time data from the real time clock unit 230 and periodically transmits these data to the cordless telephone handset.

The storage unit 220 is composed of flash memory and RAM. The flash memory is used to store programs to be executed by the communication processing and system control unit 210 or data to be stored for a long time. RAM is used to store temporary data.

The real time clock unit 230 generates date and time data and transmits these data to the communication processing and system control unit 210 , or updates the date and time data in accordance with a command from the communication processing and system control unit 210 . The date and time data is periodically passed by the communications processing and system control unit 210 to the handset of the cordless telephone. Alternatively, the user can update the date and time data directly via the handset of the cordless telephone.

The Bluetooth RF transceiver unit 240 transmits signals output through the Bluetooth RF transceiver interface of the communication processing and system control unit 210 to the handset of the cordless telephone, and transmits signals output from the handset of the cordless telephone to the communication processing and system control unit 210.

The Internet connection unit 250 utilizes a multipurpose asynchronous digital subscriber line modem or an Ethernet connection module to transmit data to and receive data from other communication devices over the Internet.

The compressed audio signal conversion unit 260 converts a continuously variable slope delta modulator (CVSD) audio signal or a pulse code modulation (PCM) audio signal into a G.723.1 audio signal, or converts a G.723.1 audio signal into A CVSD or PCM audio signal to transmit the converted audio signal to the communication processing and system control unit 210. With the compressed audio signal conversion unit 260, the CVSD or PCM audio signal transmitted from the cellular phone through the SCO link using the Bluetooth function is converted into a G.723.1 audio signal and delivered to the Internet phone station. In addition, due to the compressed audio signal conversion unit 260, it is possible to convert a G.723.1 audio signal into a CVSD or PCM audio signal and transmit it to a cellular phone using the Bluetooth function. Therefore, a portable telephone having a Bluetooth function can be used like a handset of a cordless telephone.

Figure 3 is a detailed block diagram of an embodiment of an Internet telephony station.

A central processing unit (CPU) 310 of a 32-bit RISC processor processes digital signal processing (DSP) commands. The communication processing and system control unit 210 has a 128K byte Internet memory 320, ie static memory or cache memory, and an external storage interface device 330 to connect with the external ROM 340 and the static memory 350.

The communication processing and system control unit 210 further includes various registers, interrupt and timer controllers 360 and a 32-bit general purpose input/output (GPIO) unit 370 .

The Bluetooth bit controller 380 performs forward error correction (FEC), header error control, cyclic redundancy check (CRC), and encryption to generate data packets to be transmitted. Here, the Bluetooth bit controller 380 transmits the data packet to the Bluetooth RF transceiver device 314 via the RF transceiver interface (IF) unit 384 . Data packets transmitted from the RF transceiver unit 314 through the RF transceiver IF unit 384 are transmitted to the Bluetooth bit controller 380 . The Bluetooth power controller 382 controls transmit and receive power and drives a phase-locked loop (PLL) to generate an internal high-speed clock.

The Internet connection unit 250 connected to the communication processing and system control unit 210 includes an Ethernet controller 311 , an xDSL module 312 , and a PSTN module 313 . Therefore, the Internet phone is connected to the Internet or a telephone network via the Internet connection unit 250 .

A Light Emitting Diode (LED) 390 for displaying the connection status of the network and the Bluetooth link is connected to the GPIO unit 370 and controlled by the CPU 310 .

Fig. 4A shows software protocol group, it is located in the ROM35 of communication processing and system control unit 210;

The Bluetooth function is composed of a general access profile (GAP) 410, a service display profile (SDP) 411, a cordless phone profile (CTP) 412, a telephony control protocol specification (TCS) 413, a link management protocol (LMP) 414 , and baseband/link management (BBILM) 415 to implement.

The GAP410 supports Bluetooth wireless link creation and disconnection functions and a parking mode, and the SDP411 only supports the cordless phone service provided by the device in the Bluetooth network to check the service category. The illustrated CTP 412 for providing this cordless telephone service meets the criteria for TCS 413 operation.

A call control message from TCS 413 is passed through an L2CAP 416 as a link control protocol that manages a flow control and error correction function. In addition, the G.723.1 audio package is delivered through L2CAP416.

GPIO driver 420 controls LED 390 and network driver 421 performs Ethernet, xDSL, and PSTN connection functions.

The call connection process is performed by the TCS413 when the call connection process interacts with H.323, and the connection with the other party's Internet phone is performed by the H.323 protocol. For this, there is a TCP/IP protocol 422 and an Ethernet driver and Ethernet controller 423 . The system control software 430 manages the bluetooth schema, controls the Internet telephony protocol 424, ie H.323, and manages the password resource.

Figure 4b shows the software protocol suite located in the ROM 350 in the communication processing and system control unit, which is used when communicating with a portable telephone having a Bluetooth interface.

Figure 4B shows a protocol suite similar to that of Figure 4a. However, a continuously varying slope delta modulator (CSVD) 460 and a G.723 470 stack are located in BB/LM and RF 450.

Figure 5 is a block diagram of an embodiment of a cordless telephone handset for an Internet cordless telephone in accordance with the present invention;

The cordless telephone handset includes a communication processing and handset control unit 510 , a user input unit 520 , a screen display unit 530 , a storage unit 540 , an audio processing unit 550 , and a Bluetooth RF transceiver unit 560 .

The communication processing and handset control unit 510 is composed of a high-speed processor module operated by a program, a Bluetooth RF transceiver IF module, a Bluetooth baseband processing module, a storage control module, and a general input/output unit.

In addition, the communication processing and handset control unit 510 processes keypad signals from the user input device 520, generates character data for output to the screen display unit 530, and performs an audio encoding function for compressing and decompressing audio data. In addition, the communication processing and handset control unit 510 exchanges audio data with the audio processing unit 550, generates audio data output from the audio processing unit 550 to transmit the audio data to the audio processing unit 550, and processes wireless data exchange with an Internet telephone station Communication.

The audio coding function for compressing and decompressing audio data is realized by the G.723.1 method or the G.729 method, which are international standard methods. Communication exchanging wireless data with an Internet telephone station is performed through an ACL link that allows a wireless link to be established between a master and seven slaves conforming to the Bluetooth standard. In addition, the telephone handset exchanges call setup and disconnection messages, audio encoding data, and user interface data with the Internet telephone station corresponding to the host through the ACL link. Additionally, the handset periodically receives date and time data from the Internet telephony station.

The user input unit 520 is composed of a keypad and a driving device. When the user presses the keypad, a corresponding signal is delivered to the communication processing and handset control unit 510 via the general-purpose input/output unit of the communication processing and handset control unit 510 . Here, the keypad includes number buttons, a send button, and other menu buttons.

The screen display unit 530 composed of a character display LCD and a driving device displays a telephone number input by the user, a caller ID, a telephone directory stored in the storage unit, date and time data, and functions selected by the user. processing results.

This storage unit 540 is made up of flash memory and RAM, and flash memory is used for storing the program that will be executed by communication processing and telephone handset control unit 210 or the data that will be stored for a long time such as telephone directory, and RAM is used for storing temporary data.

The audio processing unit 550 converts digital audio data transmitted from the communication processing and handset control unit 510 and various audio data such as ringback tones and dial tones into analog signals to output the converted analog signals through a speaker. In addition, the audio processing unit 550 converts an analog signal received through a speaker into digital data to transmit the converted digital data to the communication processing and handset control unit 510 .

The Bluetooth RF transceiver unit 560 transmits a signal transmitted through the Bluetooth RF transceiver IF of the communication processing and handset control unit 510 to the Internet telephone station 100 . In addition, the Bluetooth RF transceiver unit 560 transmits a signal transmitted from the Bluetooth RF transceiver unit 240 of the Internet phone station 100 to the communication processing and handset control unit 510 .

Figure 6 is a detailed block diagram of a cordless telephone handset.

The central processing unit 610, which is a 32-bit RISC processor, processes DSP commands. The communication processing and handset control unit 510 has a 128K byte Internet memory 611, i.e. static memory or cache memory, and an external memory interface device 612 so as to be connected with the external read-only memory 630 and the static memory 620.

The communication processing and handset control unit 510 further includes various registers, interrupt and timer controllers 613 and a 32-bit general-purpose input and output unit 614 .

A Bluetooth bit controller 615 performs forward error correction, header error control, cyclic redundancy check and encryption to generate data to be transmitted. Here, the Bluetooth bit controller 615 transmits data to the Bluetooth RF transceiver unit 640 via an RF transceiver IF unit. Data delivered from the RF transceiver unit 640 via the RF transceiver IF unit is transferred to the Bluetooth bit controller 615.

A Bluetooth power controller 616 controls the transmission and reception of power and drives the PLL used to generate the internal high-speed clock.

The communication processing and handset control unit 510 performs CVSD and PCM processing by utilizing DSP functions and transmits the processed audio data to external analog devices 650, ie, analog-to-digital (A/D) converter and digital-to-analog (D/A) converter to output audio data to amplifiers and speakers. The communication processing and handset control unit 510 converts the audio signal input from the loudspeaker into G.723.1 audio data by utilizing the DSP function, and decodes the received audio packet in accordance with the G.723.1 standard, so that the decoded The audio package is output to the speakers.

A keypad 660 and a liquid crystal display 670 serving as a user interface are connected to the GPIO unit 614 to perform key-in and data output, respectively. The keypad 660 checks the state of the input key every 10 milliseconds by using the GPIO unit 614 . If the same key is input more than three times, the keypad 660 determines that a correct key is input. A liquid crystal display 670 that displays the user's input and phone number, protocol address, Internet phone number, or another party's name is connected to the GPIO unit 614 and controlled by the CPU 610 when a call is received.

FIG. 7 shows the software protocol suite, which resides in the ROM 630 of the communication processing and handset control unit 510.

The Bluetooth function is realized by a GAP710, a SDP711, a CTP712, a TCS713, a LMP714, and a BB/LM715.

The GAP710 supports a Bluetooth wireless link for make and break functions and a park mode, and the SDP711 supports cordless phone service only by checking the type of service provided by devices in the Bluetooth network. The CTP412 is used for providing the cordless telephone service and meets the operating standard of TCS713.

Calls are established and issued, and G.723.1 audio packets are sent and received via TCS713. Call control messages from TCS 713 are transferred through L2CAP 716, which is a link control protocol that manages flow control and error correction functions. Additionally, packets of G.723.1 audio encoding 722 are transmitted and received via L2CAP 716 . The GPIO driver 720 controls the keypad 660 and the LCD display 670, and the PCM driver 721 provides audio data to the G.723.1 audio encoder and outputs decoded PCM data to the speaker.

The system control software 730 manages the bluetooth profiles, user data and passwords, and the system according to user selected functions, ie, Internet telephony, PSTN telephony selection, and abbreviated dialing.

Figure 8 shows an embodiment of a call signal connection process for connecting an Internet call using a cordless telephone handset;

At step 810, when the user presses the other party's Internet phone number, a setup message is passed to the Internet phone station. In step 820, the Internet telephone station transmits call connection request information to the other party via the Internet by the H.323 SIP method, and in step 830 transmits a call processing message to the handset of the cordless telephone to announce that a call is in progress.

In step 840, when the Internet telephone station receives an alert processing message from the other party, in step 850 the Internet telephone station transmits an alert message to the handset of the cordless telephone so that the handset of the cordless telephone generates a ringback tone signal through the speaker.

Next, in step 860, when the Internet telephone station receives a call connection complete message from the other party, in step 870 the Internet telephone station transmits a connection message to the handset of the cordless telephone. Thereafter, in step 880 the cordless telephone handset transmits a connection confirmation message to the Internet telephone station in preparation for connecting a call. At step 890, encoded audio data is sent and received between the Internet telephony station and the cordless telephone handset to complete the call with the other party.

Messages used in the call signal connection process between the Internet telephone station and the cordless telephone handset are transmitted over the ACL link.

If another cordless telephone also connects a call when a handset of a cordless telephone connects a call, the same call signal connection process as above is performed because each handset of the cordless telephone is distinguished by a predetermined Internet telephone number.

In addition, if the Internet phone station further includes the compressed audio signal conversion unit, a portable phone having a Bluetooth function is connected to the Internet phone station instead of the handset of the cordless phone.

The process of connecting a call with the portable phone having the Bluetooth function is the same as the call signal connection process of connecting a call with the handset of the cordless phone as shown in FIG. 8 . For this reason, the Internet telephone station must have a compressed audio signal conversion unit to convert CVSD, or PCM audio signals into G.723.1 audio signals. Accordingly, a CVSD or PCM audio signal delivered from a Bluetooth-enabled cellular phone through the SCO link is converted to a G.723.1 audio signal and delivered to the Internet phone station. In addition, the G.723.1 audio signal is converted into a CVSD or PCM audio signal and delivered to a Bluetooth-enabled cellular phone.

Fig. 9 shows an embodiment of a reception signal connection process for receiving an Internet call from outside using a handset of a cordless telephone.

In step 910, when the Internet telephone station receives the call connection request message through the Internet using the H.323 method or the SIP method, in step 920 the Internet telephone station transmits the establishment information including the Internet telephone number with the cordless telephone handset to the cordless telephone handset.

A caller ID is included in the setup information only when a caller ID service is provided. In step 930, the handset of the cordless telephone receiving the setup message generates a ring tone and transmits an alert message to the Internet telephone station.

In step 940, the Internet telephony station receiving the alert message transmits an alert processing message to the other party. In step 950, when the user receives a call, the cordless telephone handset transmits a connection message to the Internet telephone station, and then the Internet telephone transmits a call connection completion message to the other party in step 960, and transmits a connection confirmation message to the cordless telephone station in step 970. Telephone handset in preparation for a call. At step 980, encoded audio data is transmitted and received between the Internet telephony station and the cordless telephone handset to complete the call with the other party.

Messages used in the signal connection process between the receiving Internet telephone station and the cordless telephone handset are transmitted over the ACL link.

If another cordless telephone handset receives a call while another cordless telephone handset is on, the same reception signal connection process as above is performed because each cordless telephone handset is distinguished by a predetermined Internet phone.

Fig. 10 shows a call disconnection process for ending a telephone call.

When the cordless telephone handset disconnects a call, at step 1010, a disconnect message is passed from the cordless telephone handset to the Internet telephony station. Therefore, at step 1020, the Internet telephone station transmits the connection disconnection request message to the other party through the Internet using the H.323 method or the SIP method. Thereafter, in step 1030, when the Internet telephone station receives a connection disconnection completion message from the other party, in step 1040 the Internet telephone station transmits a call disconnection message to the handset of the cordless telephone. Accordingly, in step 1050, the cordless telephone handset transmits a call disconnect complete message to the Internet telephone station, thereby disconnecting the call.

Messages between the Internet telephone station and the cordless telephone handset for invoking release processing are transmitted over the ACL connection.

If another cordless telephone handset disconnects a call, the same call disconnection processing as described above is performed.

11A-11C show the data structure of packets used in the ACL link.

Referring to Fig. 11A, the data structure of data packet consists of a 3-bit protocol identifier field 1110, a 5-bit message type field 1120, and a variable-length data field 1130 corresponding to the protocol identifier field 1110 and the message type field 1120 composition.

When the value of the protocol identifier field 1110 is 000, it is well known that the variable-length data field 1130 transmits Telephony Control Protocol Specification (TCS) call control data defined in the Bluetooth standard. When the values of protocol identifier field 1110 are 001 and 101, it is known that data field 1130 transmits TCS group management data and TCS connectionless data, respectively.

The above values have been defined in the Bluetooth standard; however, a new value of the protocol identifier field 1110 is defined in the present invention. In other words, when the value of the protocol identifier field 1110 is 100, the variable-length data field 1130 conveys compressed audio data. Although the Bluetooth standard specifies that the SCO link is allocated and the audio signal is transmitted, a predetermined value representing the delivery of the data packet is set in the protocol identifier of the data structure, which is used in the ACL link as the channel that passes the call The control signal is established so that the variable length data field 1130 carries audio packets according to predetermined values of the present invention.

Fig. 11C shows the kinds of message type field values. When the value of the message type field 1120 is 00000, it is known that compressed audio data exists in the variable-length data field 1130 . Here, the variable-length data field 1130 further includes a message indicating the kind and length of the compressed audio data.

When the value of the message type field 1120 is 00001, this is the case where the well-known flow control function is used, and it is well known that Internet telephony preferably receives compressed audio data from another party and is ready to receive compressed audio data. When the value of the message type field 1120 is 00010, it is well known that the buffer is full or the buffer cannot receive compressed audio data from another party. In other words, a value of 00010 is used to request that the transmission of compressed audio data be stopped until the Internet phone sends an audio packet confirmation message to the other party.

Since the transmission speed of audio packets is less than 6.3 kilobits per second for the case of G.723.1, the audio packets are adequately delivered by adding them to the variable-length data field 1130 .

The method for transmitting and receiving the audio packet includes a method of allocating a new ACL link by requesting the ACL link for the call through the call establishment information, and transmitting through the allocated ACL link after the call is established and receive audio packets.

The present invention can be realized with a program that can be executed by a computer that executes the program by reading a readable medium on which the program is stored.

In addition, the data structure used in the embodiments of the present invention can be recorded on a computer-readable recording medium by various methods.

Here, the recording medium includes any type of recording device that records data, such as magnetic recording media, namely, read-only memory, floppy disk, and hard disk, optical recording media, namely, optical disks and DVDs, and carrier waves, that is, transmission on the Internet.

By using an Internet cordless phone according to the present invention, up to seven people can make simultaneous calls over one Internet line so that the cost for making calls is reduced and mobility limitations are overcome.

In addition, although the SCO link uses a maximum of three channels, the ACL link can use a maximum of seven channels and the call is only 44.1kbps, because the call of a channel is only 6.3kbps.

In particular, up to seven people can receive calls from outside and make calls outside so that each can have a cordless handset that displays their own characteristics. So, everyone can connect and receive calls regardless of other calls being connected/received. In addition, each person can put their own messages in the handset of the cordless telephone, such as a telephone directory.

Therefore, the Internet cordless phone according to the present invention can be used as an Internet phone at home, office, and small office at a very low cost while securing privacy.

While the invention has been shown in detail and described in terms of preferred embodiments, it will be understood by those of ordinary skill in the art that the present invention can be obtained without departing from the spirit and scope of the invention as defined by the following claims. , various modifications can be made to the constitution and details of the present invention.

Claims (16)

1, an Internet telephony station comprises:

One communication process and system control unit, convert user's audio pack to Internet protocol (IP) data according to the Internet telephony agreement, and transmit the IP extracting data audio pack of coming, and data wireless is transferred to cordless telephone handset and receives data from cordless telephone handset from the opposing party;

Program and data that one memory cell, storage are will be in communication process and system control unit performed;

One real-time clock (RTC) unit produces date and time data are sent to communication process and system control unit also according to setting up the date and time data from the order of communication process and system control unit;

One bluetooth radio frequency (RF) transceiver unit will be sent to cordless telephone handset and will be transferred to communication process and system control unit from the audio pack of cordless telephone handset from the audio pack of communication process and system control unit output; And

The internet linkage unit that links to each other with the internet, according to the Internet telephony agreement to transmitting from the audio pack of cordless telephone handset and receiving Internet telephony protocol data from the opposing party.

2, the Internet telephony station of claim 1, wherein communication process is connected link (ACL) next and cordless telephone handset switched call foundation and turn-off data with system control unit by asynchronous nothing, the voice data of having encoded, and user interface data have been stipulated this ACL link in bluetooth standard.

3, the Internet telephony agreement is wherein handled by H.323 method or session initiation protocol (SIP) method as international standard in the Internet telephony station of claim 1.

4, the Internet telephony station of claim 1, wherein the RTC unit produces and rebuilds the date and time data according to the data by user's input.

5, the Internet telephony station of claim 1, further comprise a compressing audio signal converting unit, the PCM data transaction that this converting unit will be received from the voice frequency terminal with blue tooth interface becomes by defined data of international standard G.723.1 or G.729, so as by communication process and system control unit with transfer of data to the internet linkage unit.

6, a kind of cordless telephone handset that is used for Internet telephony comprises:

One communication process and receiver control unit are used for handling and are communicating by letter and control each functional unit with wirelessly the swap data process is needed at the Internet telephony station;

One user input unit is used to receive from user's order and with this order and is sent to communication process and telephone receiver control unit;

A kind of screen display unit is used to show information and the current information of relevant telephone receiver imported by the user;

One memory cell, being used for storing will be at communication process and performed program and the telephone number of telephone receiver control unit;

One audio treatment unit, be used for to convert to from the digital audio-frequency data that communication process and telephone receiver control unit transmit analog signal outputing to loud speaker, and will convert the digital audio-frequency data that will be sent to communication process and telephone receiver control unit to from the audio signal of microphone; And

One bluetooth RF transceiver unit is used for that the audio pack from communication process and telephone receiver control unit is transferred to the Internet telephony station and receives audio pack from the Internet telephony station it is transferred to communication process and telephone receiver control unit.

7, the cordless telephone handset of claim 6, wherein a plurality of cordless telephone handsets are arranged and have distributed different ID so that get in touch with the Internet telephony station independently simultaneously for each cordless telephone handset.

8, the cordless telephone handset of claim 6, wherein communication process and telephone receiver control unit come and switched call foundation of Internet telephony station and turn-off data by the ACL link, the voice data of having encoded, and user interface data have been stipulated this ACL link in bluetooth standard.

9, the cordless telephone handset of claim 8, wherein ACL link or an ACL link that is used to set up calling of predesignating, or a new ACL link.

10, a wireless telephone of internet comprises:

The Internet telephony station that links to each other with the internet is used to receive by international standard method or the transmission of SIP method data of coming H.323; And

A cordless telephone handset is used for coming compressing to send it to the Internet telephony station by the Bluetooth ACL link from user's audio pack according to international standard G.723.1 or G.729.

11, a kind of call signal that is used to connect cordless telephone handset is to carry out the method for the Internet call, and this method comprises:

(a) set up an ACL link with the Internet telephony station;

(b) reception the opposing party's Internet telephony number;

(c) the ACL link that passes through to be set up transmits to set up and calls out the needed message of setting up, and this message is corresponding with received Internet telephony number;

(d) will call out the opposing party that connection is sent to the internet from the message request at Internet telephony station, this Internet telephony station has received sets up message;

(e) the ACL link that passes through to be set up after the message transfer request call connects receives the call treatment message from the Internet telephony station;

(f) receive from the opposing party's alarm processing messages and by listening the ACL link of setting up to receive alert message by the Internet telephony station from the Internet telephony station;

(g) calling that stands on the internet to be realized according to Internet telephony connects to come by the ACL link and receives connection message from the Internet telephony station; And

(h) when receiving this connection message, the connection acknowledge message is transferred to the Internet telephony station by this ACL link.

12, a kind of received signal that is used to connect cordless telephone handset method of calling out with receiving internet, this method comprises:

(a) the message request calling that receives from the Internet telephony station connects;

(b) when received message request call out connect with cordless telephone handset at once, set up an ACL link with the Internet telephony station;

(c) receive foundation by the ACL link of having set up from the Internet telephony station and call out the needed message of setting up, this Internet telephony station receives the calling connection message from the opposing party;

(d) alert message is sent to the Internet telephony station and will be sent to the opposing party from the alarm processing messages at Internet telephony station by the ACL link of having set up according to the message of setting up that is received;

(e) by the ACL link of having set up connection message is sent to the Internet telephony station according to the Internet telephony station of transmitting the alarm processing messages, and will connect from the calling at Internet telephony station and finish message and be sent to the opposing party, wherein this Internet telephony station has received connection message; And

(f) the Internet telephony station receive call out to connect finish message after, receive from the connection acknowledge message at Internet telephony station by the ACL link of having set up and to call out passage so that set up one.

13. the recording medium by embodied on computer readable, this medium memory with the method corresponding programs of claim 11 and 12.

14, a data structure, this data structure is used for the voice data that compressed by the ACL link transmission, it constitutes by protocol identifier field, message type field and with the transmission data field of protocol identifier field value and the corresponding variable-length of message type field value, and wherein the transmission data field that is used to represent transmit by the ACL link variable-length under the data conditions of audio compressed data in the protocol identifier field storage transmits the voice data that has compressed.

15, a kind of data structure that is used for transmitting by the ACL link voice data that has compressed, this data structure comprises

A protocol identifier field, expression is the voice datas that compressed with the data that are transmitted;

A message type field, be used for being used to represent under the data conditions of the transmission of audio compressed data the state of the user mode of expression flow process controlled function and the voice data that has compressed or receive the voice data that has compressed in protocol identifier field storage; And

The transmission data field of a variable-length is used for the corresponding audio compressed data of storage and protocol identifier field and message type field.

16, claim 14 or 15 data structure are used for transmitting the voice data that has compressed by the ACL link, and the voice data that has wherein compressed is compressed by International Standards Method G723.1 or G729.

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