KR20060091374A - Chatting method used bluetooth technology and mobile phone used it - Google Patents

Abstract

The present invention relates to a near field chat method using Bluetooth and a mobile communication terminal to which the method is applied, and activates a Bluetooth module and supports a PAN (Personal Area Network) profile among the Bluetooth profiles. PAN (Personal Area Network) profile to search the device to configure the Bluetooth device network, run the chat application for Bluetooth near-field chat, and chat data processed by the chat application. By using the standard, it is possible to transmit and receive with Bluetooth devices that support the PAN (Personal Area Network) profile searched by the User Datagram Protocol (UDP) method. Chat data without charge It is designed to transmit at reliable transmission speed.

Bluetooth, PAN (Personal Area Network), UDP

Description

Close chat method using Bluetooth and mobile communication terminal using this method {Chatting method used Bluetooth technology and Mobile phone used it}

1 is a schematic diagram of a Bluetooth local area network

2 illustrates a Personal Area Network (PAN) Profile on a Bluetooth Protocol stack.

3 is a diagram illustrating a Bluetooth profile.

4 is a flowchart according to an embodiment of a short range chat method using Bluetooth according to the present invention.

The present invention relates to a near field chat method using Bluetooth and a mobile communication terminal to which the method is applied, and to a technique for transmitting chat data in real time without charging on a near field Bluetooth network.

When providing a messenger service through a mobile network, the user is charged per packet, which is a significant burden in terms of cost, and the transmission speed changes according to the network situation of the mobile network, so that consistent chat is provided. There was a problem that data transmission is not guaranteed.

Therefore, the present inventors apply Bluetooth technology, which is a short-range network technology that can operate in the 2.4 GHz frequency band that does not require a license (no charge is generated), and is used between users located at a relatively short distance (about 10 m) such as at work or home. The research on the technology that can transmit the chat data at a reliable transmission speed without charge.

The present invention has been invented under the above-mentioned purpose, and by using a short-range Bluetooth network technology, a short-range using Bluetooth which enables a user to transmit chat data at a reliable transmission rate without charge between users located at a relatively short distance, such as at work or home. It is an object of the present invention to provide a chat method and a mobile communication terminal to which the method is applied.

According to an aspect of the present invention for achieving the above object, the present invention activates a Bluetooth (Bluetooth) module, and searches for a Bluetooth device that supports a Personal Area Network (PAN) profile of the Bluetooth profile (Profile) Configure a Bluetooth device network, run a chat application for Bluetooth near-field chat, and chat data processed by the chat application using a personal area network (PAN) profile specification. Characterized in that the transmission and reception with a Bluetooth device that supports the PAN (Personal Area Network) profile found by the UDP method.

Therefore, the present invention can transmit chat data at a reliable transmission speed without charge between users on a local Bluetooth network such as a workplace or home.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

1 is a schematic diagram of a Bluetooth local area network.

As shown in the figure, Bluetooth is a wireless connection within a short distance (10m to 100m) between portable communication devices such as mobile communication terminals, portable PCs, PDAs, network access points, and other peripheral devices. Technical specification for (Radio Link, 2.4GHs ISM Open Band).

Bluetooth aims to be installed in all information devices used in homes and offices, and it can be connected with any wired / wireless network by forming a wireless network (Wireless Piconet, Ad Hoc Scatternet, etc.). Therefore, when a wireless network using Bluetooth is completed, all data devices (especially laptops, PDAs, and mobile communication terminals) can exchange data freely, and if an Internet bridge is configured, a desktop computer can be reached through an optical cable, an ADSL, or a modem. The internet information is finally reached to the user's hand.

Bluetooth operates in the 2.4 GHz Industrial Scientific Medical (ISM) band, which does not require a license, and employs frequency hopping, one of the spread spectrum methods, to avoid interference with other devices. This method operates to randomly switch frequencies in each slot to prevent interference by a fixed transmission frequency.

Although all Bluetooth devices are identical in hardware, they operate as a master or slave depending on the situation, and they constitute a minimum unit of piconet. The Bluetooth device which initially initiated communication becomes a master and communicates with a slave in the piconet. At this time, communication in the piconet is managed by the master.

The Bluetooth Specification is a de facto standard that contains the information required to enable various devices using Bluetooth wireless technology to communicate with each other anywhere in the world. The specifications are largely divided into two parts: a core specification describing a physical part and firmware required for the physical part, and a profile prepared for compatibility between devices.

The core part may include radio frequency (RF), baseband, link manager, service discovery protocol (SDP), transport layer, and other communication protocols. It specifies the interoperability with.

The Profiles section covers the protocols and procedures required for different types of Bluetooth applications.

FIG. 2 is a diagram illustrating a Personal Area Network (PAN) Profile on a Bluetooth Protocol stack.

In the figure, the RF (Radio Frequency) layer is composed of hardware (H / W), and has the same structure as the physical layer of the OSI (Open System Interconnection).

The baseband layer is used to connect the RF layer and the Bluetooth device. Since Bluetooth uses a frequency hopping spread spectrum scheme in which packet state data transmits time-divided frequency bands, these protocol stacks use the method of Inquiry and Paging. It synchronizes the hopping frequency of the device with the clock. In other words, the baseband layer corresponds to the physical layer (OSI) of the OSI (Open System Interconnection) and the media access control (MAC) of the data link layer.

The Link Manager (LM) protocol is responsible for establishing a link between Bluetooth devices. In addition, this link manager protocol plays a security role and controls the generation, exchange, check and baseband packet size of the link or encryption key. In addition, it controls the connection state of the Piconet (Piconet). That is, the link manager (LM) corresponds to a data link layer (OSI) of an open system interconnection (OSI), and performs a logical link control (LLC) function of a local area network (LAN).

The host controller interface (HCI) defines a procedure for the upper protocol to access hardware (H / W).

L2CAP (Logical Link Control & Adaptatior Protocol) makes logical connection in Bluetooth environment, transmits data when connection is established, multiplexing function for higher protocol and partitioning of data. (Segmentation) and Reassembly. This L2CAP is responsible for the network layer function of Open System Interconnection (OSI), and establishes a logical environment for transmitting data traffic.

SDP (Service Discovery Protocol) is in charge of the protocol of how to search for the type of service provided by the Bluetooth device, and uses SDP to identify the information and service contents of each device to establish connection between devices. You can do it.

RFCOMM (Cable Replacement Protocol) is a protocol for simulating multiple serial ports that exist on top of L2CAP.It can control RS-232C control or baseband data signal for higher layer protocol. It is responsible for supporting.

The TCS Binary (Telephone Control Protocol Specification Binary) is a protocol for implementing a wireless telephone function in Bluetooth, and defines a call control signal for establishing voice or call data between Bluetooth devices.

The SDP, RFCOMM, and TCS Binary correspond to a Presentation Layer of OSI (Open System Interconnection), and are expressed in a form suitable for transmission. Although not shown in the drawing, Bluetooth as an upper layer protocol of the RFCOMM AT Commands, which define AT commands for controlling mobile phones and modems for various uses, Point-to-Point Protocol (PPP) for establishing one-to-one connections, TCP / IP / UDP for Internet access, The protocol layer of the session layer defined by the Infrared Data Association (IrDA) for exchanging objects is the same as the HTTP of the Internet, but there is a higher performance Object Exchange (OBEX) protocol.

Meanwhile, in the drawing, GAP (Generic Access Profile) is a basic connection of Bluetooth, and is a profile to be mounted by all Bluetooth devices.

In the figure, a personal area network (PAN) is a profile added for a personal area network, and is a profile required when transmitting data using a user datagram protocol (UDP).

3 is a diagram illustrating a Bluetooth profile.

Profile is a standard that defines how to use Bluetooth in the highest-level application (Application), as shown in Figure 3 is representative, will gradually expand.

SUMMARY OF THE INVENTION The present invention aims to transmit chat data at a reliable transmission rate without charging on a short-range Bluetooth network by using a PAN profile of Bluetooth.

To this end, the short range chat method using Bluetooth according to the present invention performs an operation as shown in FIG. 4.

4 is a flowchart according to an embodiment of a short range chat method using Bluetooth according to the present invention.

First, the short range chat method using Bluetooth according to the present invention activates a Bluetooth module in the Bluetooth activation step S110.

That is, when a user uses a chat service using a mobile terminal equipped with Bluetooth, the user first selects a chat menu by manipulating a user interface (UI). Then, the mobile communication terminal determines whether or not the Bluetooth module is operated and supplies power to the Bluetooth module, and the Bluetooth module is activated by the Bluetooth activation step (S110).

Then, the activated Bluetooth module searches for a Bluetooth device supporting a PAN (Personal Area Network) profile among the Bluetooth profiles (Profile) in the network configuration step (S120) to configure a Bluetooth device (Device) network.

That is, the Bluetooth module activated by the Bluetooth activation step (S110) searches for a Bluetooth device supporting a PAN (Personal Area Network) profile among the Bluetooth devices located in a short distance through a network configuration step (S120). Or configure an Ad-Hoc Network.

Then, in the chat application execution step (S130), the mobile communication terminal executes a chat application (Chatting Application) for Bluetooth short-range chat.

That is, when the Bluetooth device network is configured by the network configuration step S120, the mobile communication terminal executes a chat application including a chat input window and a chat reception window through a chat application execution step S130. Since the chat application may be developed in various forms by a developer, a detailed description thereof will be omitted, and a chat message is input or output through the chat application.

Then, in the device selection step (S140) whether or not to send and receive chat data with all Bluetooth devices that support the PAN (Personal Area Network) profile retrieved by the network configuration step (S120) or the PAN (Personal Area Network) profile The user is selected whether to send or receive chat data with a specific Bluetooth device.

At this time, in the device selection step (S140), when the user is selected to send and receive chat data with a specific Bluetooth device that supports a Personal Area Network (PAN) profile, the PAN (Personal) retrieved by the network configuration step (S120) It is preferable to further include selecting a specific Bluetooth device among the Bluetooth devices that support the Area Network) profile from the user.

Next, in the chat message transmission step (S150), the Bluetooth module configures the network by using the PAN (Personal Area Network) profile standard among the chat data processed by the chat application. Transmit and receive with a Bluetooth device that supports the personal area network (PAN) profile found by the step.

Therefore, the present invention is able to transmit the chat data at a reliable transmission rate without charging between users located in a relatively short distance, such as work or home by applying a short-range Bluetooth Network technology, Bluetooth according to the present invention It is possible to achieve the purpose of the near field chat method and the mobile communication terminal to which the method is applied.

The short-range chat method using Bluetooth according to the present invention as described above, and a mobile communication terminal to which the method is applied, use chat short-range Bluetooth network technology to communicate chat data between users located at relatively short distances, such as work or home, without charge. It can transmit at a reliable transmission rate and has a useful effect to improve user convenience.

While the invention has been described with reference to the preferred embodiments, which are referred to by the accompanying drawings, it is apparent that various modifications are possible without departing from the scope of the invention within the scope covered by the following claims from this description. .

Claims (4)

A Bluetooth activation step of activating a Bluetooth module; A network configuration step of searching for a Bluetooth device supporting a Personal Area Network (PAN) profile among the Bluetooth profiles and configuring a Bluetooth device network; A chat application execution step of executing a chat application for a Bluetooth short range chat; The Chatting Data processed by the chat application supports the Personal Area Network (PAN) profile retrieved by the network configuration step in a UDP manner using a PAN (Personal Area Network) profile standard among Bluetooth profiles. Transmitting a chat message to and from a Bluetooth device; Near field chat method using Bluetooth, characterized in that it comprises a. The method of claim 1, The short-range chat method using the Bluetooth: Whether to send or receive chat data with all Bluetooth devices that support the Personal Area Network (PAN) profile retrieved by the network configuration step, or whether to send or receive chat data with a specific Bluetooth device that supports the Personal Area Network (PAN) profile Selecting a device selected by the user; Short-range chat method using a Bluetooth characterized in that it further comprises. The method of claim 2, In the device selection step: If the user is selected to send a short message to a specific Bluetooth device that supports the Personal Area Network (PAN) profile, the user may use a specific Bluetooth device among the Bluetooth devices that support the Personal Area Network (PAN) profile detected by the network configuration step. The short-range chat method using Bluetooth further comprising being selected from. A mobile communication terminal to which a short-range chat method using Bluetooth according to any one of claims 1 to 3 is applied.

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