KR100701777B1 - Method for traffic handoff of mobile phone and mobile phone there for - Google Patents

Abstract

A method and a mobile communication terminal for switching traffic are provided to automatically detect the attenuation of reception signal sensitivity and automatically switch multimedia traffic to other terminals, thereby increasing data transmission stability and easily sharing resources. A mobile communication terminal(10) for switching multimedia traffic through a session initiation protocol and a communication protocol comprises a memory(100) for storing a communication program for setting a call connection to other terminals through the session initiation protocol and transmitting multimedia traffic through the communication protocol, and a controller(200) for receiving connection information regarding multiple terminals located at a predetermined distance from an external excess point and requesting traffic switching for a terminal mapped to selected connection information.

Description

Traffic switching method of the mobile communication terminal and the mobile communication terminal {method for traffic handoff of mobile phone and mobile phone there for}

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

Figure 2 is a simplified block diagram of a control unit provided in a mobile communication terminal according to an embodiment of the present invention.

3 is an exemplary view of a screen of a mobile communication terminal according to an embodiment of the present invention.

4 is a flowchart illustrating an operation of a controller provided in a mobile communication terminal according to an embodiment of the present invention.

5 is a flowchart illustrating operations of a controller provided in a mobile communication terminal according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: mobile communication terminal 100: memory

200: control unit 210: call connection processing unit

220: communication processing unit 230: determination unit

240: target processing unit 250: traffic conversion processing unit

300: SIP processing module 310: transaction processing unit

320: conversion processing unit 330: transmission processing unit

400: RTP / RTCP processing module 500: UDP processing module

600: display unit 610: screen window

700: key input unit

The present invention relates to a traffic switching method of a mobile communication terminal and a mobile communication terminal, the traffic switching method of the mobile communication terminal for automatically converting the traffic of the currently performing multimedia transmission to another terminal located within a predetermined distance and the mobile communication terminal It is about.

The known Session Initiation Protocol (SIP) is an application layer protocol among the OSI 7 layers, and is responsible for call processing (creating, terminating, and moving sessions for data exchange) for session exchange. The terminal supporting the session initiation protocol communicates using an e-mail address (hereinafter referred to as SIP-URL) of a peer-to-peer signaling concept.

Therefore, the terminal has a session initialization protocol associated with a server (Registrar Server) providing a SIP-URL established in an existing communication network and a server (Redirect Server, Proxy Server) for processing SIP messages. The call connection with another terminal is established by transmitting the included message.

The terminal operates by transmitting multimedia traffic with another terminal through another communication protocol (eg, RTP protocol).

In this case, the terminal may transmit a REFFER message provided by the session initiation protocol to the other terminal so that the other terminal may establish a call connection with another terminal to transmit multimedia traffic. In this case, however, the terminal is inconvenient to be limited only if the terminal knows the SIP-URL of another terminal in advance.

An object of the present invention is to provide a traffic switching method and a mobile communication terminal of the mobile communication terminal that automatically converts the currently running multimedia traffic to another terminal located within a predetermined distance.

Another object of the present invention is to provide a traffic switching method of a mobile communication terminal which automatically detects that the received signal sensitivity of the multimedia traffic currently being performed is attenuated and converts it to another terminal, and a mobile communication terminal thereof.

According to an aspect of the present invention for achieving the above object, a mobile communication terminal for switching the multimedia traffic through the session initiation protocol and communication protocol, establishing a call connection with any other terminal through the session initialization protocol And a memory for storing a communication program for performing multimedia traffic transmission through the communication protocol, and when a traffic switching request is input while the multimedia program is transmitted with another terminal by the communication program, a predetermined distance from an external access point. And a control unit for requesting the other terminal to switch traffic to a terminal corresponding to at least one connection information selected by receiving the access information of a plurality of terminals located in the terminal.

Preferably, the control unit is a call connection processing unit for establishing or releasing a call connection with any other terminal through the session initiation protocol, and communication for performing multimedia traffic transmission with the other terminal is established by the call connection processing unit A processing unit, a target processing unit which receives connection information of a plurality of terminals located within a predetermined distance through an external access point, and determines at least one connection information as connection information of a terminal to which traffic is to be switched; And a traffic switching processor for requesting another terminal to perform the multimedia traffic transmission to the terminal corresponding to the determined access information.

More preferably, the control unit further includes a determination unit for measuring the received signal sensitivity of the multimedia traffic performed by the communication processing unit to determine the traffic switching request, and determines whether the measured received signal sensitivity is less than a predetermined reference value. do.

More preferably, the control unit further includes a determination unit for determining whether predetermined key data has been input from a key input unit to determine the traffic switching request.

According to another aspect of the present invention, a method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, in the state of performing multimedia traffic transmission with another terminal through the communication protocol, Measuring received signal strength of the multimedia traffic; requesting a plurality of pieces of access information to an external access point when the measured received signal strength is less than a predetermined reference value; and performing the request as a result of the requesting step When a plurality of pieces of access information are received from a point, determining at least one of the received plurality of pieces of access information as the access information of the terminal to be traffic-transformed, and converting traffic to a terminal corresponding to the determined access information to the multimedia traffic. To other terminals performing the transfer. It provides a method for switching multimedia traffic of a mobile communication terminal comprising the step of calling.

According to another aspect of the present invention, a method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, requesting a plurality of access information to an external access point, and the requesting step If a plurality of pieces of access information are received from the access point as a result of the execution, determining at least one of the plurality of pieces of received access information as access information of a terminal to which traffic is to be switched; Establishing a call connection through the communication protocol; performing multimedia traffic transmission with another terminal on which the call connection is established through the communication protocol; measuring received signal strength of the multimedia traffic; If the received signal strength is less than or equal to a predetermined reference value, It provides multimedia traffic switching method of a mobile communication terminal comprising the step of requesting the traffic switching to the terminal corresponding to the determined connection information to the other terminal which performs a transmission media traffic.

According to another aspect of the present invention, a method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, in a state of performing multimedia traffic transmission with another terminal through the communication protocol, Determining whether input key data is input; requesting a plurality of access information from an external access point when the preset key data is input; and receiving a plurality of access information from the access point as a result of executing the request step. When the access information is received, determining the at least one of the plurality of received access information as the traffic information of the target to be switched traffic, and the multimedia traffic transmission to the traffic switching to the terminal corresponding to the determined access information; Requesting another terminal to perform It provides multimedia traffic switching method of a mobile communication terminal that.

According to another aspect of the present invention, a method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, requesting a plurality of access information to an external access point, and the requesting step If a plurality of pieces of access information are received from the access point as a result of executing the step, selecting at least one of the received plurality of access information as the connection information of the terminal to switch traffic, and any other terminal and the session initialization protocol Establishing a call connection through the communication protocol; transmitting multimedia traffic to another terminal to which the call connection is established through the communication protocol; and corresponding to the selected connection information according to whether predetermined key data is input. Prior to the multimedia traffic Multimedia traffic switching method of a mobile communication terminal comprising the step of requesting the other device provides to perform.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

1, a memory 100 for storing a communication program in which a procedure for establishing a call connection with another terminal through the session initiation protocol and performing multimedia traffic transmission through the communication protocol is programmed, and the memory ( A control unit 200 that reads programs stored in 100 and performs a procedure programmed in each program, a SIP processing module 300 that provides a session initiation protocol for performing call connection, and a method for transmitting multimedia traffic. An RTP / RTCP processing module 400 and UDP processing module 500 that provides a communication protocol, a display unit 600, and a key input unit 700 are configured.

First, the memory 100 stores a communication program in which a procedure for establishing a call connection with any other terminal through the session initiation protocol and performing multimedia traffic transmission through the communication protocol is programmed. Stores access information of a terminal, which is information required for a traffic switching method according to an example.

At this time, the access information of the terminal includes SIP-URL information used as an identification address in the session initialization protocol.

The controller 200 performs a call connection with any other terminal through the session initialization protocol provided by the SIP processing module 300 according to the procedure of the communication program stored in the memory 100, and performs multimedia with the connected other terminals. Traffic transmission is performed through a communication protocol provided by the RTP / RTCP processing module 400 and the UDP processing module 500.

During the transmission of the corresponding multimedia traffic, the controller 200 receives connection information of a plurality of terminals located within a predetermined distance from an external access point as preset key data is inputted, thereby selecting at least one connection information. Request the other terminal to switch traffic to the terminal.

Meanwhile, the SIP processing module 300 is a stack of session initiation protocols that support management (set, release, traffic switching request, etc.) of call connection with other terminals according to a control signal of the controller 200. According to the embodiment, the transaction processing unit 310 composed of a transaction user and a transaction based on the RFC3261 of the Internet Engineering Task Force (IEFT), the conversion processing unit 320 composed of a parser and a generator converting a SIP message, and a SIP message are transmitted and received. Although implemented as a function block configured to include a transmission processor 320, the present invention is not limited thereto.

The transaction processing unit 310 is a configuration corresponding to a transaction managing communication divided into a pair of Transaction User (TU) and Request / Response, which are the entire SIP Stack processing engines, and includes a plurality of request messages (INVITE, ACK, BYE, CANCEL, OPTION, REGISTER, REFFER, etc.) to generate and transmit, match, and delete the request message according to the control signal of the controller 200.

At this time, the INVITE message is a request message transmitted when requesting a SIP session between terminals or to change a media session of a generated SIP session, and an ACK message is a request used for confirming a final response corresponding to an INVITE message received from the outside. Message, a BYE message is a request message sent to end an established media session, a CANCEL message is a request message sent to cancel when a call setup is being requested by an INVITE message, and an OPTION message is a message of a partner's performance ( The request message is sent when querying capability. The REGISTER message is a request message sent to register the current IP address and URL in Registrar, a server built in a communication network, and the REFFER message is used to request the traffic switching of the other party. This is a request message to send.

The transaction processor 310 provides a plurality of response messages and transmits response messages corresponding to request messages received from the outside.

The conversion processing unit 320 is a configuration corresponding to a SIP Parser / Generator and a Session Description Protocol (SDP) Parser / Generator. The conversion processing unit 320 converts a message of a structure generated by the transaction processing unit 310 into a message in a string form, or transmits a transmission processing unit ( 330 loads a message in the form of a string input from the structure and outputs it as a message.

The transmission processor 330 has a configuration corresponding to a transport, which is a transmission / reception path of a message, converts a message generated by the transaction processor 310 into a message in a string form using the conversion processor 320, and sends the received message. Converts the message into a message of the structure and outputs the result to the transaction processing unit 310.

Meanwhile, the RTP / RTCP processing module 400 is a module for processing real-time transport protocol (RTP) and real-time transport control protocol (RTCP), and transport layer communication for transmitting and receiving voice or call in real time. According to the agreement, audio and video data is output as multimedia traffic.

UDP (user datagram protocol) processing module 500 is a module that provides data transmission, and sends the multimedia traffic output by the RTP / RTCP processing module 400 to the outside, the packet received from the outside RTP / RTCP processing It serves to output to the module 400.

2 is a simple block diagram of the controller 200 provided in the mobile communication terminal 10 according to an embodiment of the present invention.

Referring to FIG. 2, the control unit 200 may include a call connection processing unit 210 for setting or releasing a call connection with another terminal, a communication processing unit 220 for performing multimedia traffic transmission with another terminal for which call connection is established; A determination unit 230 for determining whether predetermined key data has been input, a target processor 240 for determining a connection information selected by providing a plurality of pieces of connection information as the connection information of a target to which the other terminal is to switch traffic; And a traffic switching processor 250 for requesting the other terminal to switch traffic of the access information to the terminal.

The call connection processor 210 establishes or releases a call connection with another terminal by using a plurality of request messages provided by the SIP processing module 300.

In detail, the call connection processing unit 210 commands the SIP processing module 300 to send an INVITE message to the outside in order to establish a call connection with another terminal. The SIP processing module 300 commands the BYE message to be sent out to release the call connection.

The communication processing unit 220 performs multimedia traffic transmission with another terminal to which a call connection is established by the call connection processing unit 210 through the RTP / RTCP processing module 400 and the UDP processing module 500.

The determination unit 230 determines whether predetermined key data for requesting traffic switching is input using the key data input from the key input unit 700.

The target processor 240 transmits a predetermined request message for requesting a plurality of access information to an access point located within a predetermined distance, and includes a plurality of SIP-URLs from the transmitted access point. Receive connection information.

In addition, the target processor 240 displays a plurality of received connection information on the screen 610, and the destination information for the other terminal to switch traffic to the memory 100 on the connection information selected through the screen 610. Save as connection information of.

Referring to FIG. 3, the screen window 610 may include a portion 611 indicating that the connection information is displayed, and a plurality of connection information ([1] notebook, [2] beam projector, [3] by the target processing unit 240. PDA) includes a portion 612 and a selection button 613.

Accordingly, as the user operates the selection button 613 by viewing the displayed plurality of access information, the target processor 240 determines a terminal (eg, a notebook) of the selected access information as the target terminal.

The traffic switching processor 250 requests the traffic switching to the target (laptop) according to the connection information to another terminal that is currently connected to the call using the SIP processing module 300.

In detail, the traffic switching processor 250 transmits a REFER message for requesting traffic switching among other request messages provided by the SIP processing module 300 to the corresponding other terminal.

At this time, the REFER message includes a flag indicating REFER according to a known session initiation protocol technique, a SIP-URL of another terminal, a SIP-URL of the terminal, and a SIP-URL of a target (laptop) to which traffic is to be switched.

At this time, the other terminal receiving the REFER message transmits a message (INVITE, Replaces message) for establishing a call connection to the traffic switching target (laptop) using the SIP-URL of the traffic switching target (laptop), The multimedia traffic transmission operation with the target (laptop) is performed. The other terminal transmits a NOTIFY message informing the terminal 10 when the transmission operation is completed.

Therefore, when the NOTIFY message is received from the target (laptop), the traffic switching processor 250 sends a response message (200 OK) to the corresponding other terminal, and sends a BYE message to the target (laptop).

4 is an operation flowchart of the control unit 200 provided in the mobile communication terminal 10 according to an embodiment of the present invention.

Referring to FIG. 4, the call connection processor 210 establishes a call connection with another terminal by transmitting an INVITE message to another terminal using the SIP processing module 300 (S1).

Next, the communication processing unit 220 performs multimedia traffic transmission with another terminal to which a call connection is established in step S1 through the RTP / RTCP processing module 400 and the UDP processing module 500 (S2).

The determination unit 230 determines whether predetermined key data for requesting traffic switching is input from the key input unit 700 (S3).

As a result of the determination in step S3, when predetermined key data is input, the target processor 240 requests a plurality of access information from an access point located within a predetermined distance (S4).

The target processor 240 receives a plurality of pieces of access information as a result of the step S4, and displays the received access information on the screen window 310 (S5).

The target processor 240 determines whether any connection information is selected among the plurality of connection information displayed on the screen window 310 (S6).

As a result of the determination in step S6, if any connection information is selected, the target processor 240 stores the selected connection information as the connection information of the target to which traffic is to be switched (S7).

The traffic switching processor 250 transmits a REFER message including the access information stored in step S7 to the corresponding other terminal (S8).

Accordingly, the other terminal establishes a call connection to the target according to the access information based on the received REFER message and transmits multimedia traffic. When the multimedia traffic transmission ends, the other terminal or the target according to the access information transmits a NOTIFY message to the terminal 10.

Next, the traffic switching processor 250 determines whether a NOTIFY message has been received (S9).

As a result of the determination in step S9, when the NOTIFY message is received, the traffic switching processor 250 transmits a response message (200 OK) corresponding to the NOTIFY message to the corresponding other terminal, and sends the BYE message to the target of the access information. (S10).

The mobile communication terminal according to an embodiment of the present invention determines the input of the predetermined key data requesting the traffic switching using the determination unit 230 to operate the target processor 240 and the traffic switching processor 250. Although the present invention is not limited thereto, the determination unit 230 may be implemented to automatically sense that the received signal sensitivity of the multimedia traffic transmission currently being performed is attenuated below a predetermined reference value. .

In this case, the mobile communication terminal according to another embodiment of the present invention includes each component shown in Figs. 1 and 2 (memory 100, control unit 200, call connection processing unit 210, communication processing unit 220, determination unit). 230, the target processing unit 240, the traffic switching processing unit 250, the SIP processing module 300, the transaction processing unit 310, the conversion processing unit 320, the transmission processing unit 330, the RTP / RTCP processing module 400 , UDP processing module 500, display unit 600, key input unit 700 is the same configuration. The determination unit 230 measures the received signal sensitivity of the multimedia traffic being performed and determines whether the measured received signal sensitivity is equal to or less than a predetermined reference value.

5 is a flowchart illustrating an operation of the controller 200 provided in the mobile communication terminal according to another embodiment of the present invention.

Referring to FIG. 5, the call connection processor 210 establishes a call connection with another terminal by transmitting an INVITE message to another terminal using the SIP processing module 300 (S11).

Next, the communication processing unit 220 performs multimedia traffic transmission with another terminal to which a call connection is established in step S11 through the RTP / RTCP processing module 400 and the UDP processing module 500 (S12).

The determination unit 230 measures the received signal sensitivity of the multimedia traffic currently being performed (S13).

The determination unit 230 determines whether the measured received signal sensitivity is equal to or less than a predetermined reference value (S14).

As a result of the determination in step S14, when the received signal sensitivity is equal to or less than a predetermined reference value, the target processor 240 requests access information of a plurality of terminals from an access point located within a predetermined distance (S15).

In operation S16, the target processor 240 receives a plurality of pieces of access information as a result of performing the step S15, and displays the received access information on the screen window 310.

The target processor 240 determines whether any connection information is selected among the plurality of connection information displayed on the screen window 310 (S17).

As a result of the determination in step S17, if any connection information is selected, the target processing unit 240 stores the selected connection information as the connection information of the target of traffic switching in the memory 100 (S18).

The traffic switching processor 250 transmits a REFER message including the access information stored in step S18 to the corresponding other terminal (S19).

Accordingly, the other terminal establishes a call connection to the target according to the access information based on the received REFER message and transmits multimedia traffic. When the multimedia traffic transmission ends, the other terminal or the target according to the access information transmits a NOTIFY message to the terminal 10.

Next, the traffic conversion processing unit 250 determines whether a NOTIFY message has been received (S20).

As a result of the determination in step S20, when the NOTIFY message is received, the traffic switching processor 250 transmits a response message (200 OK) corresponding to the NOTIFY message to the corresponding other terminal, and sends the BYE message to the target of the access information. (S21).

The present invention has been described with reference to preferred embodiments and many specific variations. However, those skilled in the art will understand that many other embodiments other than those specifically described also fall within the spirit and scope of the invention.

According to the present invention as described above, the user can easily share resources by converting the multimedia traffic currently being performed to the terminal located at a short distance.

For example, the user may share the multimedia content currently being viewed or heard with the terminal located at a short distance.

In particular, the user may use the device in various ways, such as transmitting multimedia traffic to a device to perform a presentation through an operation on his terminal.

In addition, by detecting that the received signal sensitivity of the current multimedia traffic is attenuated and automatically request traffic switching, it is effective to increase the stability of data transmission.

For example, when the reception sensitivity decreases due to the movement of the user, the terminal may automatically perform traffic switching to another terminal located at a short distance, thereby keeping the reception of data securely.

Claims (8)

A mobile communication terminal for switching multimedia traffic through a session initiation protocol and a communication protocol. A memory for storing a communication program for establishing a call connection with another terminal through the session initiation protocol and transmitting multimedia traffic through the communication protocol; When a traffic switching request is input while the multimedia program is transmitted to another terminal by the communication program, the communication program corresponds to at least one access information selected by receiving access information of a plurality of terminals located within a predetermined distance from an external access point. And a controller for requesting the other terminal to switch traffic to the terminal. The method of claim 1, wherein the control unit A call connection processing unit for establishing or releasing a call connection with any other terminal through a session initialization protocol; A communication processor configured to transmit multimedia traffic to another terminal to which a call connection is established by the call connection processor; A target processing unit which receives the access information of a plurality of terminals located within a predetermined distance through an external access point when the traffic switching request is input, and determines at least one access information as the access information of the terminal to switch traffic; And a traffic switching processor for requesting another terminal to transmit the multimedia traffic to the terminal corresponding to the determined access information. The method according to claim 2, The control unit, And a determination unit for measuring the received signal sensitivity of the multimedia traffic performed by the communication processor to determine the traffic switching request, and determining whether the measured received signal sensitivity is equal to or less than a predetermined reference value. terminal. The method according to claim 2, The control unit, And a determination unit that determines whether predetermined key data is input from a key input unit to determine the traffic switching request. A method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, Measuring a received signal strength of the transmitted multimedia traffic in a state of performing multimedia traffic transmission with another terminal through the communication protocol; Requesting a plurality of pieces of access information from an external access point when the measured received signal strength is less than or equal to a preset reference value; If a plurality of pieces of access information are received from the access point as a result of executing the requesting step, determining at least one of the plurality of pieces of access information as access information of a terminal to which traffic is to be switched; And requesting another terminal to perform the multimedia traffic transmission to the terminal corresponding to the determined access information. A method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, Requesting a plurality of access information from an external access point, If a plurality of pieces of access information are received from the access point as a result of executing the requesting step, determining at least one of the plurality of pieces of received access information as access information of a terminal to switch traffic; Establishing a call connection with any other terminal through the session initiation protocol; Performing multimedia traffic transmission with another terminal to which the call connection is established through the communication protocol; Measuring received signal strength of the performed multimedia traffic; Requesting to switch traffic to a terminal corresponding to the determined access information to another terminal performing the multimedia traffic transmission when the measured received signal strength is less than or equal to a predetermined reference value. How to switch multimedia traffic. A method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, Determining whether predetermined key data has been input while performing multimedia traffic transmission with another terminal through the communication protocol; Requesting a plurality of pieces of access information from an external access point when the preset key data is input; When a plurality of pieces of access information are received from the access point as a result of the requesting step, determining at least one of the plurality of pieces of received information as access information of a target to which traffic is to be switched; And requesting another terminal to perform the multimedia traffic transmission to the terminal corresponding to the determined access information. A method for performing multimedia traffic switching in a mobile communication terminal providing a session initiation protocol and a communication protocol, Requesting a plurality of access information from an external access point, If a plurality of pieces of access information are received from the access point as a result of executing the requesting step, selecting at least one of the received pieces of access information as access information of a terminal to which traffic is to be switched; Establishing a call connection with any other terminal through the session initiation protocol; Performing multimedia traffic transmission with another terminal to which the call connection is established through the communication protocol; And requesting another terminal for performing the multimedia traffic transmission to switch the traffic to the terminal corresponding to the selected access information according to whether predetermined key data is input. How to switch.

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