KR100527426B1 - Operation Method to Separate Data and Control Message in Multiple Wireless Network System - Google Patents

Abstract

The present invention relates to a method for separately operating a data transmission network and a control message transmission network in a multiple wireless network system, comprising the steps of: a) creating a list of currently available networks; b) database the network status; c) Selecting a network to transmit data and control messages; d) sending data and control messages; e) checking whether control message reception problems occur; and f) if there are no problems in receiving control messages. The program processing the received corresponding control message.

Description

Operation Method to Separate Data and Control Message in Multiple Wireless Network System

The present invention relates to a method for separating and operating a data and control message transmission network in a multi-radio network system. More specifically, to control a network that has a wide radio range and a narrow bandwidth on a system capable of operating a multi-radio network. Dedicated to sending the necessary control messages to improve system control speed and stability.

Currently, wireless terminals are used in many fields, and are used in various fields ranging from general data transmission / reception to multimedia data transmission / reception.

Commonly used wireless communication standards include IEEE 802.11a, IEEE 802.11b, and IEEE 802.11g. These standards are distinguished by the frequency domain and the bandwidth used. These wireless communication standards are being implemented to be used in one communication terminal in order to expand the choice of users and increase the usability of the device. Depending on the purpose of the communication terminal, additional wireless communication standards and wires can be implemented in one device.

IEEE 802.11b and IEEE 802.11g have a frequency band of 2.4 to 2.479 GHz, a radio reach is longer than that of IEEE 802.11a, and a radio wave shading area is smaller. IEEE 802.11a has a frequency range of 5.15 to 5.25 GHz, which avoids the problem of frequency interference with other standard equipments. This can happen more.

IEEE 802.11b has a bandwidth of 10Mbps, and IEEE 802.11a and IEEE 802.11g are being replaced for data communication. IEEE 802.11a and IEEE 802.11g are capable of transmitting and receiving up to 54Mbps of data per second to obtain the bandwidth required for high-capacity data and multimedia communications over wireless networks, and have enough bandwidth to realize compressed video of TV quality. have.

Traditional computer networks used to communicate time-dependent data such as files and web documents, but nowadays television, radio, video on demand, audio on demand, voice over IP, and home use Time-dependent data communication is increasing due to the increase of multimedia data communication such as communication between AV devices and game programs through the network.

These multimedia data communications and time-dependent data communications require proper bandwidth allocation and continuous communication.

If a communication device is configured to run such a network at the same time, the device can assign a specific network to a desired application. In this case, it is possible to simultaneously transmit transmission data and control messages that are in charge of control between the application program and the transmission / reception device through the network.

However, if the corresponding bandwidth is short in radio wave propagation, many shadow areas, or large data transmission, transmission of a control message may be delayed or fail.

If the transmission of the control message is delayed, unnecessary data is transmitted during the delay time, and the corresponding bandwidth is consumed. When a large amount of data such as multimedia is transmitted, the amount of unnecessary data is wasted. In addition, a control message may not be delivered or missed at a precise time, and may not result in a user's control or the system may fall into an unstable state.

An object of the present invention is to transmit data by exclusively transmitting a control message necessary for control with other systems in a network capable of operating a variety of wireless networks to a network with a wide bandwidth and a narrow bandwidth to solve the above problems. It is to provide a way to maintain stable data communication regardless of bandwidth.

Another object of the present invention is to generate a control message in the form of a heartbeat (Heart-Beat) every predetermined time period, so that each transmitting station can check the state of each other and communicate with each other so as to predict and respond to the state of the communicating station. To keep it safe.

In order to achieve the above object, a method of separately operating a data and control message transmission network in a multiple wireless network system of the present invention comprises the steps of: a) creating a list of currently available networks; b) database the network status; c) selecting a network to transmit data and control messages; d) sending data and control messages; e) checking whether control message reception problems occur; and f) having problems receiving control messages. If no, a higher program processes the received control message.

In the present invention, a method of selecting a network to transmit the control message of step c) is preferably to select a network that has a long range of radio waves, a low shadow area, and does not consume much bandwidth.

In the present invention, the network for transmitting the control message preferably conforms to the standard of IEEE 802.11b.

In the present invention, the method for transmitting the control message of step d) preferably transmits the next control message after waiting for a certain period of time after transmitting the predetermined control message.

The present invention preferably further comprises the step of stopping the execution of the higher-level program and the transmission / reception of data and repeating the step d) when a problem occurs in receiving the control message in step e).

In the present invention, it is preferable that the higher-level program processing the control message of step f) has a higher priority for program execution than the higher-level program processing the data.

Hereinafter, with reference to the accompanying drawings will be described in more detail.

1 is a flowchart illustrating a method of separately operating a transmission network for data and control messages in a multiple wireless network system according to an embodiment of the present invention.

The embodiment schematically illustrates a process of separating and transmitting data and control messages.

A process of separating and transmitting data and control messages will be described with reference to FIG. 1.

Step 101 is a process of creating a list of currently available networks.

The available networks are checked among the systems currently connected to the network, and a list of available networks is created.

If a network currently available is searched for, the transmission / reception information of the network is configured. Preferably, the transmission / reception information includes an IP address, bandwidth, transmission method, transmission speed, etc. of the corresponding transmission / reception terminal.

Step 102 is a process of databaseing the network status.

In step 101, the available network is searched, and if information on the transmitting / receiving terminal of the corresponding network is configured, it is stored as a database. The database method may be variously implemented by a system configurator. However, in the exemplary embodiment of the present invention, the database method may be classified based on a network standard.

Step 103 is a process of selecting a transport network for transmitting data and control messages.

A network for transmitting data and control messages is selected based on the database established in step 102. The network to which control messages are sent is selected as a network with long reach, low shadow areas, and high bandwidth consumption.

That is, the present invention can solve the problem of reach and propagation zone on 802.11a by using the dedicated assignment of the control message to one of the channels of 802.11b, and solve the problems such as control message transmission delay on 802.11g.

Step 104 is a process of sending data and control messages.

When a control message is fixed to a channel on a specific transmission bandwidth, the control message is repeatedly transmitted and received at regular intervals to check the status between the transmitting and receiving stations and to appropriately respond, thereby increasing system stability.

In addition, since the allocated bandwidth can be dedicated, the period of the heart-beat message is shortened in a range that does not affect the performance of the system, thereby reducing the bandwidth loss by reflecting it in the data transmission policy between transmitting and receiving stations.

Steps 105 through 106 are processes of checking reception errors of the control message and processing accordingly.

Each transmitting / receiving station checks periodically received control messages to see if the communication station is capable of transmitting or receiving data, or if no control messages can be transmitted / received.

If proper data transmission / reception is not possible after checking the above, switch the application to a stable state such as a standby state, and continuously check the control message, and when the situation becomes stable communication can be restored, run the applications again to improve system stability. Keep it.

In addition, various information is transmitted to control messages that are repeatedly transmitted and received and reflected in the system maintenance policy.

Within each system, the priority of processing of the network driver program (device driver) that transmits / receives the control message is higher than that of the network program that transmits / receives the data so that the control message is processed first. Therefore, it is possible to reduce the waiting time of the control message generated in the situation of processing a large amount of data.

As described above, it has been described with reference to a preferred embodiment of the present invention, but those skilled in the art various modifications and changes of the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

As described above, according to the present invention, the unused bandwidth on a device capable of connecting multiple wireless networks is dedicated to transmitting and receiving control messages between entire systems to secure and operate a path for immediate and continuous system control.

In addition, by generating control messages periodically in the form of heartbeats, each transmitter / receiver can determine its network status and take action to increase system stability.

1 is a flowchart illustrating a method of separately operating a data and control message transmission network in a multiple wireless network system according to an embodiment of the present invention.

Claims (6)

In a method of separating data and control message transmission network in a multiple wireless network system, a) creating a list of currently available networks; b) database the network status; c) selecting a network to transmit data and control messages; d) sending data and control messages; e) checking whether a control message reception problem occurs; and and f) if the control message is not received at a higher level, the upper program processing the received control message in a multiple wireless network system. 2. The method of claim 1, wherein the method for selecting a network to transmit the control message of step c) comprises selecting a network having a long range of radio waves, low shadow area, and consuming no bandwidth. A method of separating data and control messages from a network. 3. The method of claim 2, wherein the network to which the control message is to be transmitted complies with the standards of IEEE 802.11b. 2. The method of claim 1, wherein the method of transmitting a control message in step d) waits for a predetermined period of time after transmitting a predetermined control message and then transmits the next control message. How to operate a separate message transmission network. The method of claim 1, further comprising stopping the execution of the upper level program and transmitting / receiving data when the control message is received in step e), and repeating step d). A method of separating data and control message transmission networks from network systems. 2. The data and control message transmission network of claim 1, wherein the higher level program processing the control message of step f) has a higher priority for program execution than the higher level program processing the data. How to operate the separation.