KR20050080524A - Method for sharing service using bluetooth in mobile communication terminal - Google Patents

Abstract

The present invention relates to a method for transmitting service data received from a system to another terminal in real time in a mobile communication terminal having a Bluetooth module. When establishing a call with the system, a connection request is made to the other terminal via Bluetooth communication. Transmitting a message, receiving a response from the other terminal, transmitting operation state information to the other terminal, processing service data received from the system according to a predetermined protocol layer, and among the protocol layers. And transmitting service data to the other terminal before being processed in an application layer. The present invention has the advantage that a plurality of mobile communication terminals can share one service (voice service or data service) in real time through Bluetooth communication.

Description

How to share service using Bluetooth in mobile communication terminal {METHOD FOR SHARING SERVICE USING BLUETOOTH IN MOBILE COMMUNICATION TERMINAL}

The present invention relates to a short range communication method using Bluetooth in a mobile communication terminal, and more particularly, to a method for sharing a service (voice service or data service) in real time through a Bluetooth communication.

The mobile communication terminals are rapidly spreading due to the convenience of portability, and thus service providers (terminal manufacturers) are competing to provide more special services (functions) to secure a large number of users.

On the other hand, the Bluetooth (bluetooth) is a standard that wirelessly connects portable devices including portable PCs, mobile phones, etc. at a low cost within a narrow range. Allows you to send and receive data. For example, if Bluetooth wireless technology is implemented in mobile phones and laptop computers, data can be exchanged between mobile phones and laptop computers without a cable connection. In fact, Bluetooth technology can be applied to personal digital computers (PDAs), desktops, faxes, keyboards, headsets and all digital devices. In general, Bluetooth-enabled devices in a mobile phone are a handset, a fax, a notebook computer, and the like, and a technology for connecting a mobile phone with a mobile phone has not been proposed.

The existing field of using Bluetooth in a mobile phone is to simply connect devices and deliver data already processed at an application level. Conventionally, there is a connection between mobile phones using infrared communication (IrDA), but this also processes the data received from one side and transmits it to the other terminal, its use range is very limited to the ringtone sharing.

Accordingly, an object of the present invention is to provide a method for a plurality of mobile communication terminals to share a service (voice service or data service) in real time through Bluetooth communication.

Another object of the present invention is to provide a method for transmitting service data to another mobile communication terminal through Bluetooth communication before being processed in an application layer in the mobile communication terminal.

According to a first aspect of the present invention for achieving the above object, in a mobile communication terminal having a Bluetooth module, a method for transmitting service data received from a system to another terminal in real time, when the call is established with the system, Transmitting a connection request to the other terminal through Bluetooth communication, transmitting a operation state information to the other terminal when receiving a response from the other terminal, and transmitting service data received from the system to a predetermined protocol layer. And transmitting service data to the other terminal before being processed in an application layer among the protocol layers.

According to a second aspect of the present invention, in a mobile communication terminal having a Bluetooth module, a method for sharing service data received by another terminal from a system is configured to check whether a connection request is received from the other terminal through Bluetooth communication. And transmitting a response to the other terminal upon receiving the connection request, receiving an operation state information of the other terminal after transmitting the response, and setting an operation state according to the received information. And checking whether the service data is received from the other terminal, and processing the service data according to the set operation state when receiving the service data.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Hereinafter, the present invention will describe a method for sharing at least two mobile communication terminals in real time a service (voice service or data service) provided by a specific terminal from a system through Bluetooth communication.

In the following description, a terminal connected to the system and receiving a service is called a master terminal, and a terminal connected to the master terminal through Bluetooth communication is called a slave terminal.

Hereinafter, the present invention will be described using Bluetooth communication. However, the present invention can be implemented using other short-range wireless communication technology that can replace Bluetooth.

1 shows a schematic block configuration of a Bluetooth system to which the present invention can be applied.

Referring to FIG. 1, a communication subject is called a host 10,14, and a device that accepts a request from the host 10,14 and enables communication according to the Bluetooth standard is called a Bluetooth module 12,16. An interface called HCI (Host Control Interface) is defined between the hosts 10 and 14 and the Bluetooth modules 12 and 16, and the control commands, its results, and the user's transmission / reception data are exchanged by exchanging corresponding messages (hereinafter referred to as HCI packets). Goes. The actual forwarding of HCI packets can be done using the popular RS232, Universal System Bus (USB), standard PC interfaces, and the like. The HCI packet is divided into a command, an event, and a data packet. Among them, the command packet provides about 60 commands according to a standard specification to variously utilize the Bluetooth module.

Hereinafter, it will be assumed that the host 10 is a master terminal and the host 14 is a slave terminal.

2 is a block diagram of a mobile communication terminal having a Bluetooth module according to an embodiment of the present invention. In the following description, the mobile communication terminal includes a cellular phone, a personal communication system (PCS), a personal data assistant (PDA), an international mobile communication-2000 (IMT2000) terminal, and the like. The following description will be described with the general configuration of the above examples.

Referring to FIG. 2, a control unit (MPU: Micro-processor unit) 200 controls the overall operation of the mobile communication terminal. For example, it performs processing and control for voice calls and data communications, and processes functions for sharing service data using Bluetooth communication according to the present invention in addition to the usual functions. In the following description, description of the processing and control of the conventional control unit 200 is omitted.

The memory 202 is largely divided into a program memory, a data memory, and a nonvolatile memory. The program memory stores a program for controlling the overall operation of the mobile communication terminal. The program memory may use a flash memory. The data memory temporarily stores data generated during the operation of the mobile communication terminal. The data memory may use random access memory (RAM). The nonvolatile memory stores telephone numbers and system parameters registered to perform functions such as speed dialing. The nonvolatile memory may use an EEPROM.

The keypad 206 includes numeric buttons 0-9, menu button, cancel button (clear), confirmation button, call button (TALK), end button (END), internet access button, navigation A plurality of function buttons such as buttons (▲ / ▼ / ◀ / ▶) are provided, and button input data corresponding to a button pressed by the user is provided to the controller 200. The display unit 208 displays status information generated during the operation of the mobile communication terminal, a limited number of characters, a large amount of moving images and still images, and the like. The display unit 208 may use a liquid crystal display (LCD).

A coder (Coder-Decoder) 210 connected to the control unit 200 and a speaker 214 and a microphone 212 connected to the codec 210 are voice input / output blocks used for voice call and voice recording. . The codec 210 converts the PCM data provided from the controller 200 into an analog voice signal, transmits the same through the speaker 214, and converts the voice signal received through the microphone 212 into PCM data. It provides to the control unit 200.

In addition, the radio frequency unit (RF) 216 lowers the radio frequency signal received through the antenna to the baseband processor 218, and increases the frequency of the baseband signal from the baseband processor 218. Transmit through the antenna. The baseband processor 218 processes a baseband signal transmitted and received between the RF unit 216 and the controller 200. For example, in the case of transmission, it performs a function of channel coding and spreading the transmission message generated by the controller 200, and in the case of reception, despreading and channel decoding the received signal. ) To restore the received message.

The Bluetooth interface 204 interfaces a signal with the Bluetooth module 12/14 mounted on the mobile communication terminal. The Bluetooth module 12/14 generates a packet of a predetermined standard by adding an access code and a header to an HCI message from the controller 200, converts the packet into an RF signal, and transmits the packet through an antenna. The packet received through the antenna is converted into an HCI message and transmitted to the controller 200. The Bluetooth interface 204 uses a well-known RS232, a universal system bus (USB), a standard PC interface, and the like. The HCI message (or packet) is divided into a command, an event, and a data packet, and among these, the command packet uses about 60 commands according to a standard specification to variously use a Bluetooth module. to provide.

Although not shown, the controller 200 includes a vocoder for a call service and a video codec for a multimedia service. These vocoders and video codecs belong to the application layer in terms of protocol. The present invention is characterized by transmitting service data (voice / data frames) to another terminal using Bluetooth before processing in the application layer. Looking in more detail as follows.

3 illustrates a protocol structure of a mobile communication terminal according to an embodiment of the present invention.

As shown, the protocol structure of the terminal includes a physical layer corresponding to OSI (Open System Interconnection) layer 1, a media access control (MAC) sub layer corresponding to OSI layer 2, and a link access control (LAC). Sublayer, and upper layer corresponding to OSI layer 3-7.

In the case of a voice call, a physical channel frame coming from the physical layer is delivered directly to an application layer by multiplexing and Qos delivery. The voice layer removes the header from the data received from the MAC sub layer and inputs the vocoder to process the data. In this process, the application layer transmits data input to the vocoder to the Bluetooth module 12 and to another terminal (slave terminal). In this case, the slave terminal may monitor or record a voice frame received from the master terminal.

On the other hand, in the case of data communication, a physical channel frame coming from the physical layer is mapped to a radio link protocol (hereinafter referred to as RLP) frame by the multiplexer (Multiplexing and Qos Delivery), and then an application layer (Data Services). Is passed to. The application layer removes a header from data received from the MAC sub layer and inputs the data to a video codec to process the data. In this process, the application layer transmits data input through the video codec to the Bluetooth module 12 and to another terminal (slave terminal). In this case, the slave terminal may play and save a data frame received from the master terminal.

As such, all signaling header information necessary for call connection and communication is processed in the master terminal, and the slave terminal operates regardless of call connection and communication with the system.

4 illustrates a procedure for transmitting service data from a master terminal to a slave terminal according to an embodiment of the present invention.

Referring to FIG. 4, first, in step 401, the controller 200 checks whether a service sharing button is input by a user's manipulation. If the service sharing button input is not detected, the controller 200 proceeds to step 425 to perform a corresponding mode (eg, standby mode). If the service sharing button input is detected, the control unit 200 proceeds to step 403 to set the service sharing mode. The service sharing mode may be set through a shortcut button input or menu setting.

After setting the service sharing mode, the controller 200 checks whether a call connection button is input in step 405. When the call connection button is input, the control unit 200 attempts to connect to the system in step 407. The controller 200 checks whether a call is set up in step 409.

If the call setup is detected, the controller 200 transmits a connection request message to a proximity terminal (slave terminal) using the Bluetooth module 12 in step 411. After transmitting the connection request message, the controller 200 checks whether a response message is received from the slave terminal in step 413. Upon reception of the response message, the controller 200 transmits a message (call type, vocoder parameter, etc.) including operation state information of the master terminal to the slave terminal through the Bluetooth module 12 in step 415.

In step 417, the controller 200 processes data (service data) received from the base station according to a predetermined protocol layer. In operation 419, the controller 200 transmits data (service data before being processed in the application layer) to the slave terminal through the Bluetooth module 12.

The controller 200 checks whether call termination occurs in step 421. Upon detecting the call termination, the controller 200 transmits the termination message to the slave terminal through the Bluetooth module 12 in step 423 and terminates the algorithm.

5 illustrates a procedure for receiving service data from a master terminal in a slave terminal according to an embodiment of the present invention.

Referring to FIG. 5, first, in step 501, the controller 200 checks whether a connection request message is received from a proximity terminal (master terminal) through Bluetooth communication. If the reception of the connection request message is not detected, the controller 200 proceeds to step 517 to perform a corresponding mode (eg, a standby mode). If the reception of the connection request message is detected, the controller 200 proceeds to step 503 and transmits a response message to the master terminal through the Bluetooth module 14.

After transmitting the response message, the controller 200 checks whether a state (call type, vocoder parameter, etc.) of the master terminal is received in step 505. When the state of the master terminal is received, the controller 200 sets an operation state of the slave terminal according to the state of the received master terminal in step 507. For example, set the operating states of the vocoder, DSP, and video / audio codec.

After setting the operation state of the slave terminal, the controller 200 checks whether service data (Voice / Data frames) is received from the master terminal in step 509. When the service data is received, the controller 200 proceeds to step 511 to process the service data according to the set operating state.

At the same time, the controller 200 checks whether an end message is received from the master terminal in step 513. When the termination message is received, the controller 200 proceeds to step 515 to release the connection with the master terminal and ends the present algorithm.

In this way, the slave terminal receives the service data (voice / data frames) transmitted from the master terminal according to the set environment, and processes them in the same or different form as the master terminal. For example, in the case of a VOD service, the slave terminal may play streaming content as (or otherwise process) streaming content without the call connection with the system. When the content supports English and Japanese, the master terminal can be played in English and the slave terminal can be played in Japanese. That is, the slave terminal can independently reprocess in addition to simple reception.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described above, the present invention has an advantage that a plurality of mobile communication terminals can share a service (voice service or data service) in real time through Bluetooth communication. In other words, terminals other than the terminal connected to the system can use the traffic (or content) in real time without connection (without charge) with the system. That is, even if only one terminal is connected to the system, data service and voice call (eg, three-party call) are possible. In this way, the contents of the call can be shared or modified, so that various additional services can be created.

1 is a schematic block diagram of a Bluetooth system to which the present invention can be applied;

2 is a diagram illustrating a configuration of a mobile communication terminal having a Bluetooth module according to an embodiment of the present invention.

3 is a diagram illustrating a protocol structure of a mobile communication terminal according to an embodiment of the present invention.

4 is a diagram illustrating a procedure for transmitting service data from a master terminal to a slave terminal according to an embodiment of the present invention.

5 is a diagram illustrating a procedure for receiving service data from a master terminal in a slave terminal according to an embodiment of the present invention.

Claims (4)

In a mobile communication terminal having a Bluetooth module, a method for transmitting the service data received from the system to another terminal in real time, When establishing a call with the system, transmitting a connection request to the other terminal through Bluetooth communication; When receiving a response from the other terminal, transmitting operation state information to the other terminal; Processing service data received from the system according to a predetermined protocol layer; Transmitting service data to the other terminal before being processed in an application layer among the protocol layers. The method of claim 1, The service data transmitted to the other terminal is characterized in that the data processed in the media access control (MAC) layer of the protocol layer. In a mobile communication terminal having a Bluetooth module, a method for sharing service data received by another terminal from the system, Checking whether a connection request is received from the other terminal through Bluetooth communication; Transmitting a response to the other terminal when the connection request is received; Receiving the operation state information of the other terminal after transmitting the response, and setting an operation state according to the received information; Checking whether the service data is received from the other terminal; And upon receiving the service data, processing the service data according to the set operating state. The method of claim 3, The service data is characterized in that the data processed in the media access control (MAC) layer.