KR20040003748A - A method of error decreasing for data communication between mobile phone - Google Patents

Abstract

PURPOSE: A method for reducing data communication errors between portable terminals is provided to confirm transmission errors of data signals transmitted in wireless sections by using TCP/IP and RLP, and to restore the transmission errors, thereby increasing data reliability between the portable terminals. CONSTITUTION: The first portable terminal decides whether the second portable terminal wants to transmit data(S100). If so, the first portable terminal sets a wireless link with the first base station. An MSC sets a wireless link between the second base station and the second portable terminal(S110). The first portable terminal, the first base station, the second base station, and the second portable terminal set to operate RLP for preventing errors of data transmitted in wireless link sections(S120). TCP and IP are set between the first portable terminal and the second portable terminal(S130). The first portable terminal and the second portable terminal transceive or transmit the data in synchronized states(S140). When the data transmission is terminated, data communication is completed(S150).

Description

A METHOD OF ERROR DECREASING FOR DATA COMMUNICATION BETWEEN MOBILE PHONE}

The present invention relates to a method for reducing transmission error in data communication using a mobile communication system, and more particularly, to a method for reducing transmission error in the case of data transmission between portable terminals.

The mobile communication system that communicates with the other party anytime and anywhere while moving is smaller and lighter due to the continuous development of technology, and the price and usage fee are also relatively cheap, so it is spreading rapidly and becoming personal communication equipment. have.

Since all communication systems exchange information with the other party, they are digitized due to the demand for technology development and speed-up. In the digital communication system, preventing transmission errors of data signals and accurate recovery of error-prone data are the most important problems.

The data communication between the mobile terminal and the mobile terminal subscribed to the mobile communication system is called M to M (MOBILE TO MOBILE) data communication, and since digital data is transmitted using the radio path and the radio path, errors in the relatively transmitted data ERROR) There are many problems that need improvement.

Hereinafter, a method of reducing data communication errors between portable terminals according to the related art will be described with reference to the accompanying drawings.

1 is a functional configuration diagram of a general mobile communication system, and FIG. 2 is a diagram illustrating a data communication method between mobile terminals according to the prior art.

Referring to FIG. 1, the general mobile communication system includes: first and second mobile terminals 10 and 15 for instant communication with a counterpart anytime, anywhere while moving;

First and second base stations (BTSs) 20 and 25 which are wirelessly connected to the first and second portable terminals 10 and 15 to communicate with each other by transmitting or receiving signals;

An exchange station (30) connected to the first and second base stations (20, 25) for monitoring and controlling, establishing a communication path by switching, and simultaneously managing the entire mobile communication system;

A public communication network (PSTN) 40 is connected to the switching center 30 and establishes a communication path with an unspecified majority.

In the mobile communication system having the above configuration, a plurality of base stations 20 and 25 are connected to the switching center 30, and each of the base stations 20 and 25 has its own service area (SERVICE AREA), The plurality of mobile terminals 10 and 15 located in the service area provided by the base stations 20 and 25 communicate wirelessly with the base stations 20 and 25.

Each of the portable terminals 10 and 15 can communicate with other portable terminals 10 and 15, and can also communicate with a wired terminal connected to the public communication network 40. The communication between the mobile terminals is called M to M communication, and each of them passes through a radio section, and therefore, the probability of an error occurring in a digital data signal transmission process is very high.

Therefore, RLP (RADIO LINK PROTOCOL) protocol is applied to reduce data transmission error in the wireless section.

Referring to FIG. 2, the case in which the conventional method for reducing data communication errors between portable terminals according to the prior art will be described as an example in which the first portable terminal 10 transmits the second portable terminal 15 to the second portable terminal 15. FIG.

The first base station 10 is connected to the first base station 20 to set up a radio path (AIR LINK), the second base station by switching by the switching station 30 connected to the first base station 20 Connected to (25).

The second base station 25 establishes the second mobile terminal 15 and the air path in the corresponding service area, so that the first mobile terminal 10 and the second mobile terminal 15 communicate with each other. The setup of the path that can be done is completed.

Since the first portable terminal 10 and the second portable terminal 15 implement and operate the RLP protocol, respectively, the execution of the RLP protocol is performed with the corresponding first base station 20 and the second base station 25, respectively. .

The RLP protocol itself has a function of checking and recovering an error of a signal transmitted and received wirelessly in a corresponding section.

When the call setting is completed as described above, the synchronization of the digital data signal (SYNC: SYNCHRONOUS) is matched between the first portable terminal 10 and the second portable terminal 15, and the corresponding data is transmitted ( DATA X-FER).

When the above data transmission is completed, the first mobile terminal 10 releases the radio connection with the first base station 20 (AIR LINK RELEASE), the second base station 25 under the control of the switching center 30. ) And the second mobile terminal 15 are disconnected (AIR LINK RELEASE).

In the data communication, each mobile terminal 10 or 15 may transmit data generated by itself, but a data communication may be performed by connecting a computer (PC) or data equipment to the mobile terminals 10 and 15. .

However, the prior art having the above-described configuration uses only one RLP protocol for checking and correcting data transmission errors between the respective mobile terminals 10 and 15, thereby causing a relatively high error rate of data transmission.

An object of the present invention is to provide an operation method for reducing data transmission error by simultaneously using the RLP protocol and the TCP / IP protocol when performing data communication between portable terminals of a mobile communication system.

In order to achieve the above object, the present invention provides a data transmission method of a mobile communication system comprising a mobile terminal, a base station, and a switching center; A start process of determining whether to perform data communication between the portable terminals; A call connection process of setting a radio link, an RLP protocol, and a TSI piapi protocol when performing data communication between the mobile terminals as determined in the above process; A transmission process of synchronizing a corresponding mobile terminal connected to the set call and transmitting data; It is determined whether the data transmission of the above process is completed, and if it is completed, characterized in that the completion process of ending the data transmission.

1 is a functional configuration diagram of a general mobile communication system,

2 is a diagram illustrating a data communication method between mobile terminals according to the prior art;

3 is an explanatory diagram of the data communication operation between the mobile terminals of the present invention;

4 is a flowchart illustrating a method for reducing errors in data communication between mobile terminals according to the present invention.

** Explanation of symbols on the main parts of the drawing **

10: first portable terminal 15: second portable terminal

20: first base station 25: second base station

30: switching center 40: public telecommunication network

Hereinafter, a method of reducing data communication errors between portable terminals according to the present invention will be described with reference to the accompanying drawings.

3 is an explanatory diagram of a data communication operation between portable terminals of the present invention, and FIG. 4 is a flowchart of a method for reducing data communication errors between portable terminals according to the present invention.

Referring to FIG. 3, the data communication operation between the mobile terminal according to the present invention will be described. For example, in the case of performing data communication between the first mobile terminal 10 and the second mobile terminal 15, The first mobile terminal 10 sets up an AIR LINK according to a call connection request and approval to the first base station 20, and controls the second base station 25 under the control of the switching center 30. ) And the second mobile terminal 15 is also set the air link (AIR LINK).

In order to prevent data errors caused by the radio link between the first mobile terminal 10 and the first base station 20, the second mobile terminal 15 and the second base station 25, the wireless link is set as described above. (RLP) protocol is set.

When the RLP protocol is set as described above, a TCP / IP (Transmission Control Protocol / Internet Protocol) protocol is set between the first portable terminal 10 and the second portable terminal 15.

In order to operate as described above, the functions of the RLP protocol and the TCP / IP protocol should be mounted in the first portable terminal 10 and the second portable terminal 15, and the first and second base stations 20 and 25 The functionality of the RLP protocol must be implemented.

When the call setup is completed as described above, the first portable terminal 10 and the second portable terminal 15 synchronize (SYNC: SYNCHRONOUS) to accurately transmit data signals transmitted and received to each other, and the synchronization is performed. DATA TRANSFER is done at.

When the data transmission between the first portable terminal 10 and the second portable terminal 15 is completed, the first portable terminal 10 releases the call established between the first base station 20 and the exchange station ( Under the control of 30, the call set between the second base station 25 and the second mobile terminal 15 is released.

Referring to FIG. 4 attached to the present invention as described above, a method for reducing data communication errors between mobile terminals includes a mobile communication consisting of mobile terminals 10 and 15, base stations 20 and 25, and switching center 30. FIG. In the data transmission method of the system,

The mobile terminal (10, 15) is a start process (S100) for determining whether to perform data communication between the mobile terminal (10, 15);

In the case of performing data communication between the mobile terminals 10 and 15 as determined in the start process (S100), by setting the radio link and the RLP protocol and the TSI piapi protocol, the mobile terminals 10 and 15 At the same time to establish a radio connection call between the base station (20, 25) (AIR LINK SETUP) (S110) at the same time to set the RLP protocol (S120), between each of the mobile terminals (10, 15) In the call setup process to set the TCP / IP protocol (S130),

A transmission step (S140) of synchronizing (SYNC) the data to be transmitted without error in the corresponding mobile terminal (10, 15) connected to the set call (CALL), and transmitting the data in the synchronized state as described above (S140);

It is determined whether the data transmission of the transmission process (S140) is completed and, if it is completed, consists of a complete process (S150) for ending the data transmission.

The data transmission between the portable terminals 10 and 15 is performed through a path PATH set by the control and monitoring of the mobile communication system switching center 30.

Hereinafter, a method of reducing data communication errors between portable terminals according to the present invention having the above-described configuration will be described in detail with reference to FIG. 4.

The portable terminals 10 and 15 may generate and transmit data on their own, and may be connected to a computer or a data device to function as a wireless modem. However, the portable terminals 10 and 15 will be described as portable terminals.

For example, the first portable terminal 10 determines whether to transmit data to the second portable terminal 15 as the counterpart (S100), and transmits data to the second portable terminal 15, that is, In case of transmitting data in the M to M scheme, the first mobile terminal 10 establishes a radio link with the first base station 20.

As described above, the switching center 30 having confirmed the radio link established between the first mobile terminal 10 and the first base station 20 switches the corresponding path PATH to switch the second base station 25 and the second mobile station. The radio link of the terminal 15 is established (S110).

As described above, the first mobile terminal 10 and the first base station 20 and the second base station 25 and the second mobile terminal 15 respectively configured with an air link are transmitted in a radio link section. The RLP protocol for preventing data errors is set to operate (SETUP) (S120).

The first and second mobile terminals 10 and 15 and the first and second base stations 20 and 25 are each equipped with an RLP protocol to process the RLP protocol. In particular, the first and second portable terminals are TCP. / IP protocol is more built-in.

By the above-described process, the first mobile terminal 10 and the second mobile terminal 15 may complete call setup and reduce data transmission error of the wireless section by RLP protocol to some extent. In order to further improve the problem, a TCP / IP protocol is set to allow TCP / IP communication between the first and second portable terminals 10 and 15 (S130).

The TCP / IP protocol is suitable for data transmission using the INTERNET network. The TCP / IP protocol is divided into packets of a predetermined unit, quickly transmits randomly through a plurality of transmission paths, and then receives the data. The data in the packet unit is rearranged in order. If the transmission error can be corrected or recovered in the above process, the transmission error data is corrected or restored.

The first portable terminal 10 and the second portable terminal 15 are synchronized with each other so that the transmitting side and the receiving side can correctly transmit and receive data while the radio link is established and the RLP protocol and the TCP / IP protocol are established. SYNC).

In the synchronized state as described above, the first portable terminal 10 and the second portable terminal 15 transmit and receive data (S140).

It is determined whether the above data transfer is completed, and when the data transfer is completed, the data communication ends (S150).

Therefore, in the present invention having the above configuration, transmission errors are reduced by the RLP protocol and transmission errors are reduced by the TCP / IP protocol, thereby improving reliability of the transmitted data.

According to the present invention, the data signal transmitted in the wireless section of the mobile communication system is recovered using the RLP protocol and the TCP / IP protocol to check the transmission error and recover when it can be recovered. There is a convenient effect in use.

In addition, since the reliability of the data transmitted in the wireless section is improved, there is an industrial use effect that can safely transmit various data while moving.

Claims (4)

In a data transmission method of a mobile communication system consisting of a mobile terminal, a base station, and a switching station, The mobile terminal starts the process of determining whether to perform data communication between the portable terminal, In the case of the data communication between the mobile terminal is determined in the above process, the call connection process for setting the radio link, the ALLP protocol and the TSI piapi protocol, A transmission process of synchronizing a corresponding mobile terminal connected to the set call and transmitting data; Determining whether the data transmission of the process is completed, and if it is completed, the data communication error reduction method between the mobile terminal, characterized in that consists of a complete process for ending the data transmission. According to claim 1, And data transmission between the mobile terminals is performed through a path established by control and monitoring of a mobile communication system switching center. The method of claim 1, wherein the call connection process, Simultaneously establishes a call for wireless connection between the mobile terminal and the base station, and sets up an RLP protocol, A method for reducing data communication errors between mobile terminals, characterized in that a TSI protocol is set between the mobile terminals. The method of claim 1, wherein the transmission process, Synchronize the data transmitted between the mobile terminal to transmit and receive without error, Error transmission method of the data communication between the mobile terminal, characterized in that for transmitting data in the synchronized state.