JP5497967B2 - Channel fixed scan system and method using a plurality of wireless chips - Google Patents

Description

  The present invention relates to a channel fixed scan system using a plurality of wireless chips, and more particularly, determines the number of wireless chips, generates channels by the number of wireless chips, and the wireless chip takes charge of a certain channel. The present invention relates to a channel fixed scan system using a plurality of wireless chips and a method thereof, which efficiently scans and transmits more packets by processing the packets so that they are scanned.

  The present invention relates to a channel fixed scan system using a plurality of wireless chips and a method thereof.

  In general, with the development of the Internet and network-related technologies, each individual can freely acquire or transmit the necessary information within the Internet environment, even if each company is located at a long distance via the Internet. It is now possible to share various information materials.

  With the development of such communication and network technology, the recent network environment is changing from a wired network environment using a wired medium such as a coaxial cable or an optical cable to a wireless network environment using wireless signals of various frequency bands. is there.

  An example of such a wireless network environment is U-City that applies advanced ubiquitous technology to cities.

  Such U-City provides U-City infrastructure facilities and ubiquitous information services, which are a fusion of information and communication infrastructure and city infrastructure facilities, to improve the convenience of urban life and improve the lives of urban residents. It is an information city for improving quality, increasing safety and welfare, and improving safety and welfare through systematic urban management.

  The IT infrastructure for providing the U-City service can be divided into a basic infrastructure, a communication infrastructure, a sensor network, and an information management infrastructure. The communication infrastructure is an information communication network that transmits and receives information such as data, voice, and video such as a wired wireless subscriber network and an internal network.

  Wireless LAN communication services, which occupy the most weight in the U-City environment, provide users with various advantages such as mobility and convenience of use, but security such as the possibility of attempting various hacking and information leaks. Contains threats.

  However, the development of technology that can demonstrate superior performance by measuring the collection performance of wireless packets for detecting intrusions into wireless LANs centering on U-City infrastructure and differentiating from existing technologies is currently underway. However, there is an urgent need for such a technique.

  The present invention has been invented to solve the above problems, and its purpose is to determine the number of wireless chips, generate channels by the number of wireless chips, and the wireless chip is responsible for a certain channel. Accordingly, it is an object of the present invention to provide a channel fixed scan system using a plurality of wireless chips and a method thereof, which efficiently scans and transmits more packets by processing to scan packets.

  In order to achieve the above object, a channel fixed scan system using a plurality of wireless chips according to the present invention includes a plurality of sensors, and a monitoring server that receives and stores signals and data received from the plurality of sensors. In the channel fixed scan system using a plurality of wireless chips, each of the sensors is determined by a number determination unit that determines the number of at least one wireless chip that can be used in the same time zone, and the number determination unit A channel generation unit that generates at least one channel corresponding to the number of the wireless chips, and one wireless chip is allocated to each of the generated channels, and each of the wireless chips A packet collection unit that handles the unit packet scan in the process, and the packet collection unit And a packet concentrator unit for gathering more scanned unit packets.

  According to the present invention, it is possible to determine the number of wireless chips, generate channels by the number of wireless chips, and process the wireless chip to scan a packet in charge of a certain channel. It has the advantage of efficiently scanning and transmitting packets.

  Further, according to the present invention, it is possible to improve the collection performance of radio packets by using a channel scan technique used when detecting a security threat in a domestic U-City infrastructure.

It is a block diagram which shows the internal structure of the sensor in the channel fixed scanning system using the some radio | wireless chip which concerns on suitable embodiment of this invention. 5 is a flowchart illustrating a process of operating a channel fixed scan system using a plurality of wireless chips according to a preferred embodiment of the present invention. It is explanatory drawing explaining the experimental environment for measuring the channel fixed scan system using the several radio | wireless chip which concerns on suitable embodiment of this invention, and the collection performance of a radio | wireless packet. It is explanatory drawing explaining the comparison result of the collection performance of the radio | wireless packet with respect to two channels. It is explanatory drawing explaining the comparison result of the collection performance of the radio | wireless packet with respect to four channels.

  Hereinafter, a preferred embodiment of a channel fixed scan system using a plurality of wireless chips according to the present invention as described above will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing an internal configuration of a sensor of a channel fixed scan system using a plurality of wireless chips according to a preferred embodiment of the present invention.

  The present invention includes a sensor 100 that determines the number of wireless chips, generates as many channels as the number of wireless chips, and processes the wireless chip to scan multi-frequency packets through each of the generated channels. Including. Here, the wireless chip means a chip formed inside the sensor 100.

  The sensor 100 includes a number determination unit 110, a channel generation unit 120, a packet collection unit 130, a packet collection unit 140, a central processing unit 150, an analysis unit 160, and a storage unit 170.

  The number determination unit 110 determines the number of wireless chips that can be used in the same time period.

  The channel generation unit 120 generates channels as many as the number of wireless chips determined by the number determination unit 110.

  The packet collecting unit 130 scans the packet with the wireless chip in charge of any one channel.

  The packet collecting unit 140 collects the packets scanned by the packet collecting unit 130.

  The analysis unit 160 receives the packets collected by the packet collection unit 140, determines whether a detection event has occurred, and sends the detection event to the monitoring server (see FIG. 3) when the detection event has occurred. On the other hand, the sensor 100 may be separately formed outside or inside the wireless traffic control device or the wireless traffic analysis device of FIG.

  The storage unit 170 stores the packets scanned by the packet collection unit 130.

  The central processing unit 150 controls the overall operation of the sensor 100 to improve the collection performance of wireless packets using a channel scanning technique.

  Hereinafter, a process of operating the channel fixed scan system using the plurality of wireless chips according to the present invention as described above will be described in detail with reference to FIG.

  FIG. 2 is a flowchart illustrating a process of operating a channel fixed scan system using a plurality of wireless chips according to a preferred embodiment of the present invention.

  First, the sensor 100 determines the number of wireless chips that can be used in the same time zone (step S100).

  Thereafter, in step S100, the sensor 100 generates channels for the determined number of wireless chips (step S110).

  Thereafter, the wireless chip takes charge of any one channel and scans the packet (step S120).

  Thereafter, the sensor 100 collects the packets scanned in step S120 (step S130).

  Meanwhile, the sensor 100 receives the packets collected in step S130 and determines whether a detection event indicating that a security threat packet is included (step S140). If the detection event occurs, monitoring is performed. The detection event is sent to the server (step S150).

  On the other hand, in the case of a wireless LAN, among the 1 to 13 channels due to the influence of channel interference, the channels that can be used simultaneously have 4 channel bands (for example, 1 to 4 and 6 to 9). When using a plurality of wireless chips, packets in all sections can be detected simultaneously.

  Below, the experimental record until this invention is invented and the effect of this invention are described.

  First, an experimental environment for measuring the collection performance of wireless packets will be described.

  In general, an experimental environment for collecting wireless packets is similar to an existing monitoring method using a wireless LAN card, but in order to configure the packet collection environment to be the same and perform fairly, a single condition and a single condition are used. The model is configured to generate the same packet. FIG. 3 is an explanatory diagram for explaining an experimental environment for measuring the collection performance of the wireless packet.

  The radio frequency band used in this experiment is a 2.4 GHz ISM (Industrial Science and Medical equipment) band generally used in Japan. [Table 1] shows the radio channel bandwidth.

  As shown in [Table 1], one channel bandwidth of a wireless LAN operated in the 2.4 GHz ISM band is 22 MHz, and the interval between adjacent channels is 5 MHz, and can be used simultaneously without duplication of signals between the same bands. The possible channels are limited to 3 channels. That is, since the bandwidths 1 to 5 overlap each other, there is a lot of signal interference, and data loss and distortion are large. Therefore, there is no mutual interference between channels. Used in

  In this experiment, as a method for securing the transmission bandwidth through the coupling of channels, 2 MHz is overlapped and set to 4 channels so that interference between signals can be minimized and a large amount of data can be collected.

  [Table 2] shows experimental conditions for radio packet collection performance.

  As shown in [Table 2], each channel of the AP is set to Nos. 2, 6, 10, and 13 so that the wireless LAN can be used in an optimal state.

  Below, an experimental method is demonstrated.

  For the measurement experiment of the wireless packet collection performance, the wireless packet collection performance using a single chip and the wireless packet collection performance using a plurality of chips were compared and analyzed in a wireless LAN environment.

  After setting a channel in the AP, Windows (registered trademark) wireless terminals were connected to the AP to generate inter-terminal traffic, and wireless packets were collected by the wireless traffic analyzer.

  A method of collecting all the traffic of the entire channel using a single chip and a method of collecting the traffic of each channel using a plurality of chips were used. Measurement of the collection performance of wireless packets was performed 5 times every 10 seconds.

  In the first experiment, after setting channels 2 and 13 and channels 6 and 10 respectively on two APs, a wireless traffic analyzer using a single chip and a plurality of chips is used for wireless packets of each channel. The collection performance of was measured.

  [Table 3] shows a measurement method of radio packet collection for two channels.

  In the second experiment, channels 2, 13, 6, and 10 were set on each of four APs, and then a wireless traffic analyzer using a single chip and multiple chips collected radio packets for each channel. Performance was measured.

  [Table 4] shows a measurement method of radio packet collection for four channels.

  Hereinafter, measurement results of wireless packet collection performance and analysis thereof will be described.

  [Table 5] shows the measurement results of the radio packet collection performance for the first two channels. FIG. 4 is an explanatory diagram for explaining the comparison results of the radio packet collection performance for the two channels. It is shown.

  [Table 5] As shown in [Table 5], when collecting wireless packets of each channel using two plural chips regardless of the AP manufacturer of (a) and (b), the packets of all sections Can be detected at the same time, and a performance that is approximately twice as good as when collecting wireless packets for the entire channel using a single chip can be confirmed.

  [Table 6] shows the measurement results of the wireless packet collection performance for the second four channels, and FIG. 5 is an explanatory diagram for explaining the comparison results of the wireless packet collection performance for the four channels. It is shown.

  As a result of the experiment, when four chips are used, packets of all sections can be detected at the same time at the same time, which is about 4 times better than the case of collecting wireless packets of the entire channel using a single chip. The performance was confirmed.

  As a result of measuring the collection performance of wireless packets, when using multiple chips, compared to using a single chip that can collect only one channel at the same time, On the other hand, it was confirmed that more packets could be detected.

  As described above, the invented channel fixed scanning method using a plurality of wireless chips has an advantage that packets in all sections can be detected simultaneously without channel interference.

  In addition, through this, the dependence of wireless security devices on foreign products can be reduced, and there is an advantage that it can greatly contribute to securing domestic technology.

  The present invention has been illustrated and described with respect to certain preferred embodiments. However, the present invention is not limited only to the above-described embodiments, and various modifications can be made without departing from the technical idea of the present invention as long as they have ordinary knowledge in the technical field to which the present invention belongs. It should be possible to implement changes. Accordingly, the scope of the present invention should not be limited to the specific embodiments, but should be construed as defined by the appended claims.

100 Sensor 110 Number determination unit 120 Channel generation unit 130 Packet collection unit 140 Packet collection unit 150 Central processing unit 160 Analysis unit 170 Storage unit

Claims (2)

In a channel fixed scan system using a plurality of wireless chips, including a plurality of sensors and a monitoring server that receives and stores signals and data received from the plurality of sensors.
Each sensor is
A number determination unit that determines the number of at least one wireless chip that can be used in the same time zone;
A channel generation unit that generates at least one channel equal to the number of the wireless chips determined by the number determination unit;
A packet collection unit that assigns one wireless chip to each of the generated channels and causes each of the wireless chips to process and process a unit packet on the assigned channel;
A fixed channel scan system using a plurality of wireless chips, wherein the wireless chip is for wireless LAN communication, and a packet collecting unit for collecting unit packets scanned by the packet collecting unit. The sensor is
The packet gathered by the packet gathering unit is received to determine whether a detection event indicating that a security threat packet is included, and when the detection event occurs, the detection event is sent to the monitoring server. The channel fixed scan system using a plurality of wireless chips according to claim 1, further comprising an analysis unit for sending.

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