KR100479162B1 - Wireless lan imprement device using ir system - Google Patents

Abstract

The present invention relates to an apparatus for implementing a wireless LAN using an IR system. In particular, an IR transmitter 110 modulating and transmitting data generated by the MSM 130 into a GMP signal, and receiving data from the GMP signal when the GMP signal is received. A plurality of cellular phones (100) each having an IR receiver (120) for extracting and outputting to the MSM (130) and belonging to a group in a specific region; A repeater 200 which performs a GMP signal relay function between the plurality of cellular phones 100 and performs a GMP relay function to the plurality of cellular phones 100 and the Internet or other communication network connection device; And a network connection device 300 receiving the GMP signal from the repeater 200 and extracting data and transmitting the extracted data to the Internet or other communication network. It enables non-communication communication between cellular phones belonging to it, facilitates wireless LAN connection through PC at low speed and stop state, as well as makes it easy to use the Internet and other communication at low cost by using wireless LAN network. By doing so, there is an outstanding effect of providing a higher quality service to cellular phone users.

Description

Wireless LAN implementation using IR system {WIRELESS LAN IMPREMENT DEVICE USING IR SYSTEM}

The present invention relates to an apparatus for implementing a wireless local area network (LAN) using an ultra-wideband impulse radio transmission (hereinafter, referred to as "IR") system. The IR system enables cellular phones based on International Mobile Telecommunication (IMT) -2000 to perform non-communicable communication within a group of specific regions, and provides a PC ( The present invention relates to a wireless LAN implementing apparatus using an IR system that facilitates a wireless LAN connection through a personal computer), and moreover, makes it possible to easily use the Internet and other communications at a low cost of a wired line using a wireless LAN network.

As is well known, the IR system has an ultra-wideband characteristic and is a field that is being recently researched as a technology capable of transmitting high-speed data with only a slight interference to existing commercial communication. IR systems were first introduced in military systems requiring non-flammability, and are attracting attention as short-range (up to 1 to 2 km) wireless communication systems in a situation where a paradigm change in frequency resources is required.

The addition of such a system to a cellular phone is very likely that this system will evolve into a wireless LAN, and in the places where this type of system will be implemented, the adoption of a wireless LAN with an IR system applied to the cellular phone will be a network or other device. This is because wireless communication can be enabled using a cellular phone as a modem. In addition, the use of mobile communication via wireless LAN in certain groups and regions is expected to have inexpensive and inexpensive communication means.

In addition, the modem to be configured as an IR system may vary depending on the size of the user's frequency band and the channel coding scheme used, but a transmission speed of up to several tens to several Mbps is possible, and the density of the power spectrum is very low. Incompatibility due to time hopping. And, unlike the conventional communication method having an intermediate frequency, this system is a system that can be made of a very simple structure that leads directly to baseband signal processing in the RF (Radio Frequency) region. Thus, when applied to cellular phones, the system can be achieved using only pulse generators, correlators, integrators, synchronizers, and code generators. A series of baseband signal processing such as signal determination and channel coding may utilize the functionality of a cellular phone.

Bluetooth (Bluetooth), which has been used in a conventional cellular phone, employs a wireless communication method for connecting a cellular phone with a device such as a PC, and this method is used for a very short distance and is used for a device such as a PC. It is intended only for the limited form of communication. Therefore, there is a problem in that difficulties exist in accessing a network of a specific region and transmitting high speed data.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to enable non-communication communication of cellular phones within a group of a specific region by using an IR system, and in a low speed and a stationary state. In addition, the present invention provides a wireless LAN realization apparatus using an IR system that facilitates wireless LAN connection through a PC and makes it possible to easily use the Internet and other communications at low cost using a wireless LAN network. .

In order to achieve the above object, an apparatus for implementing a wireless LAN using the present invention's IR system includes an IR transmitter for modulating and transmitting data generated from an MSM into a GMP signal, and extracting data from the GMP signal when a GMP signal is received. A plurality of cellular phones each belonging to a group within a specific region, each having an IR receiver outputting to the MSM;

A repeater which performs a GMP signal relay function between the plurality of cellular phones, and performs a GMP signal relay function between the plurality of cellular phones and the Internet or other communication network connection device; And

Receives GMP signal from the repeater and extracts the data from the GMP signal and transmits it to the Internet or other communication network, while the network connection device for modulating the data received from the Internet or other communication network to the GMP signal to the repeater It is characterized by.

Hereinafter, an apparatus for implementing a wireless LAN using an IR system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram of an apparatus for implementing a wireless LAN using an IR system according to an embodiment of the present invention. The apparatus for implementing a wireless LAN using an IR system according to an embodiment of the present invention includes an IR transmitter 110 and an IR. It is composed of a plurality of cellular phones 100, a repeater 200, and a network connection device 300 each having a receiver 120.

The IR transmitters 110 mounted in the plurality of cellular phones 100 respectively transmit high-speed data generated by a mobile station modem (MSM) 130 to a GMP (Gaussian Monocycle Pulse). GMP ".) And modulates the signal to the repeater 200, and transmits the signal to the repeater 200. The serial / parallel conversion unit 111, the symbol mapping unit 112, the first code generator 113, and the first code The delay unit 114 and the pulse generator 115 are provided.

In this case, when the serial / parallel conversion unit 111 mounted in the IR transmitter 110 receives the data coded by the Turbo method from the MSM 130, converts the data into parallel data and converts the symbol mapping unit into parallel data. It outputs to 112.

In addition, when the symbol mapping unit 112 mounted in the IR transmitter 110 receives parallel data from the serial / parallel conversion unit 111, the symbol mapping unit 112 may symbolize the M-ary PPM (Pulse Phase Modulation) method. After mapping (Symbol Mapping) serves to output to the pulse generator 115.

Meanwhile, the first code generator 113 mounted in the IR transmitter 110 receives a long code offset from the MSM 130 and generates a time delay coefficient C _j ^(k) . After that, it serves to output to the first code delay unit 114. At this time, the MSM 130 receives a long code, which is a time delay code, from the repeater 200.

In addition, when the first code delay unit 114 mounted in the IR transmitter 110 receives a time delay coefficient C _j ^(k) from the first code generator 113, the first code delay unit 114 receives the time delay coefficient C _j ^(k ) from the MSM 130. A time delay value C _j ^(k) x t _c is generated by delaying time according to the received pilot sync signal and then output to the pulse generator 115. At this time, the MSM 130 periodically receives a pilot synchronization signal from the repeater 200.

In addition, the pulse generator 115 mounted in the IR transmitter 110 receives the symbol-mapped high-speed data through the symbol mapping unit 112 and at the same time a time delay value from the first code delay unit 114. When (C _j ^(k) × t _c ) is input, the symbol is modulated into a GMP signal using the time delay value (C _j ^(k) × t _c ) and radiated to the repeater 200 through an antenna. Play a role.

On the other hand, the IR receiver 120 mounted in each of the plurality of cellular phones 100 when receiving a GMP signal from the repeater 200 serves to extract the high-speed data from the GMP signal to output to the MSM (130) The second code generator 121, the second code delay unit 122, the template generator 123, the pulse correlator 124, the pulse train integral processor 125, The symbol demapping unit 126 and the parallel / serial conversion unit 127 are provided.

At this time, when the second code generator 121 mounted in the IR receiver 120 receives the long code offset from the MSM 130, the second code generator 121 uses the long code offset to delay the time delay coefficient C _j ^(k). ) And output to the second code delay unit 122.

In addition, when the second code delay unit 122 mounted in the IR receiver 120 receives a time delay coefficient C _j ^(k) from the second code generator 121, the second code delay unit 122 receives the time delay coefficient C _j ^(k ) from the MSM 130. A time delay value (C _j ^(k) × t _c ) is generated by delaying time according to the received pilot synchronization signal and then output to the template generator 123.

Meanwhile, when the template generator 123 mounted in the IR receiver 120 receives a time delay value C _j ^(k) × t _c from the second code delay unit 122, the template generator 123 uses the value as a reference. After generating a waveform and outputs to the pulse correlation unit 124.

In addition, the pulse correlator 124 mounted in the IR receiver 120 receives a GPM signal from the repeater 200 and receives a reference waveform from the template generator 123, and uses the reference waveform. By demodulating the GPM signal, the symbol is repeatedly output to the pulse train integrating processor 125.

On the other hand, the pulse train integration processor 125 mounted in the IR receiver 120 receives the repeated symbol from the pulse correlator 124 and takes the integral value of all correlations to the symbol demapping unit 126. It plays a role of outputting.

In addition, the symbol demapping unit 126 mounted in the IR receiver 120 demaps the integrated symbol through the pulse train integration processing unit 125 in an M-ary manner, and then performs parallel / serial conversion unit 127. It prints in).

In addition, the parallel / serial converter 127 mounted in the IR receiver 120 receives high-speed data from the symbol demapping unit 126 and converts the high-speed data into serial data and outputs the serial data to the MSM 130. do.

In addition, the repeater 200 performs a GMP signal relay function between a plurality of cellular phones 100, and performs a GMP signal relay function to the plurality of cellular phones 100 and the Internet or other communication network access devices. do.

Meanwhile, the network connection device 300 receives the GMP signal from the repeater 200, extracts data from the GMP signal, and transmits the data to the Internet or other communication network, while transmitting the data received from the Internet or other communication network to the GMP signal. It modulates and transmits to the repeater 200, and has an IR transmitter and an IR receiver of the same structure as the plurality of cellular phones 100, respectively.

Next, an operation process of a wireless LAN implementing apparatus using an IR system according to an embodiment of the present invention having the above configuration will be described with reference to the accompanying drawings.

First, a description will be given of the non-voice data communication process between the cellular phones 100 in the wireless LAN implementation apparatus using the IR system according to an embodiment of the present invention.

Initially, the serial / parallel conversion unit 111 of the IR transmitter 110 in the arbitrary cellular phone 100 receives the turbo coded data from the MSM 130 and converts it into parallel data, and then symbol mapping. Output to the unit 112.

Then, the symbol mapping unit 112 receives parallel data from the serial / parallel conversion unit 111 and symbolly maps the parallel data to the pulse generator 115 by M-ary PPM.

Meanwhile, the first code generator 113 receives the long code offset from the MSM 130, generates a time delay coefficient C _j ^(k) , and outputs the time delay coefficient C _j ^(k ) to the first code delay unit 114. .

Then, the first code delay unit 114 receives the time delay coefficient C _j ^(k) from the first code generator 113 and adjusts it to the pilot synchronization signal received from the MSM 130. A time delay value C _j ^(k) x t _c is generated by delaying the time, and output to the pulse generator 115 at the same time.

Subsequently, the pulse generator 115 receives the symbol-mapped high-speed data through the symbol mapping unit 112 and simultaneously receives a time delay value C _j ^(k) × t from the first code delay unit 114. _{When c} ) is input, the symbol is modulated into a GMP signal using the time delay value C _j ^(k) × t _c ) and radiated to the repeater 200 through an antenna. At this time, the GMP radiated through the pulse generator 115 has a pulse structure as shown in Figure 2 when τ = 0.3 nsec, the power spectral density of the GMP is τ = 0.3 nsec 3 Has the same characteristics as As shown in FIG. 1, GMP has the same pulse shape with a very short period of 1 ns or less. Thus, as shown in FIG. 2, the -3dB band has a wide band characteristic up to several GHz. Due to the broadband characteristics, it overlaps with the frequency range used by existing communications, but the transmission power is very low and the correlation with the modulation and demodulation method of the existing commercial communication network is very low, resulting in only a slight level of interference. Therefore, the use of GMP with a very short period of time enables high-speed data transmission, leading to several Mbps.

Then, the repeater 200 relays the GMP signal transmitted from any outgoing cellular phone 100 to any incoming cellular phone 100 as it is.

On the other hand, the pulse correlator 124 of the IR receiver 120 in the incoming cellular phone 100 receives a GPM signal from the repeater 200 and at the same time receives a reference waveform from the template generator 123, The GPM signal is demodulated using the reference waveform and the symbol is repeatedly output to the pulse train integrating processor 125.

Then, the pulse train integral processing unit 125 receives the repeated symbol from the pulse correlator 124, takes an integral value of all correlations, and outputs the integrated value to the symbol demapping unit 126.

Subsequently, the symbol demapping unit 126 demaps the integrated symbol through the pulse train integration processing unit 125 in an M-ary manner, and outputs the demapping unit to the parallel / serial conversion unit 127.

Then, the parallel / serial converter 127 receives high-speed data from the symbol demapping unit 126 and converts the high-speed data into serial data and outputs the serial data to the MSM 130.

In the following description, a communication process between an arbitrary cellular phone 100 and a hub in a wireless LAN implementing apparatus using an IR system according to an embodiment of the present invention will be described.

First, the serial / parallel conversion unit 111 of the IR transmitter 110 in an arbitrary outgoing cellular phone 100 receives the turbo coded data from the MSM 130 and converts the data into parallel data and then converts the symbol into parallel data. Output to the mapping unit 112.

Then, the symbol mapping unit 112 receives parallel data from the serial / parallel conversion unit 111 and symbolly maps the parallel data to the pulse generator 115 by M-ary PPM.

Meanwhile, the first code generator 113 receives the long code offset from the MSM 130, generates a time delay coefficient C _j ^(k) , and outputs the time delay coefficient C _j ^(k ) to the first code delay unit 114. .

Then, the first code delay unit 114 receives the time delay coefficient C _j ^(k) from the first code generator 113 and adjusts it to the pilot synchronization signal received from the MSM 130. A time delay value C _j ^(k) x t _c is generated by delaying the time, and output to the pulse generator 115 at the same time.

Subsequently, the pulse generator 115 receives the symbol-mapped high-speed data through the symbol mapping unit 112 and simultaneously receives a time delay value C _j ^(k) × t from the first code delay unit 114. _{When c} ) is input, the symbol is modulated into a GMP signal using the time delay value C _j ^(k) × t _c ) and radiated to the repeater 200 through an antenna.

Then, the repeater 200 receives the GMP signal transmitted from any outgoing cellular phone 100, and transmits the signal to the network access device 300 because the destination of the signal is the Internet or other communication network.

At this time, after receiving the GMP signal from the repeater 200, the network connection device 300 extracts data from the GMP signal and transmits it to the hub (1).

According to the wireless LAN implementation apparatus using the IR system according to the present invention as described above, by using the IR system to enable non-communication communication of cellular phones in a group of a specific region, wireless through a PC at low and idle state In addition, it provides easy access to the LAN and makes it possible to provide higher quality service to cellular phone users by making it easy to use the Internet and other communication at a low cost by wire using a wireless LAN network. Has an excellent effect.

1 is a functional block diagram showing the configuration of an apparatus for implementing a wireless LAN using an IR system according to an embodiment of the present invention;

Figure 2 is a graph showing the appearance of the GMP pulse in the wireless LAN implementation apparatus using the IR system according to Figure 1,

3 is a graph showing the power spectral density of the GMP pulse according to FIG.

<Explanation of symbols for the main parts of the drawings>

100: cellular phone 110: IR transmitter

111: serial / parallel conversion unit 112: symbol mapping unit

113: first code generator 114: first code delay unit

115: pulse generator 120: IR receiver

121: second code generator 122: second code delay unit

123: template generator 124: pulse correlation unit

125: pulse train integral processing unit 126: symbol demapping unit

127: bottle / serial converter 130: MSM

200: repeater 300: network connection device

Claims (3)

A plurality of members belonging to a group in a specific area each having an IR transmitter for modulating and transmitting the data generated in the MSM into a GMP signal, and an IR receiver for receiving the GMP signal and extracting the data from the GMP signal and outputting the data to the MSM. Cellular phones; A repeater which performs a GMP signal relay function between the plurality of cellular phones, and performs a GMP signal relay function between the plurality of cellular phones and the Internet or other communication network connection device; And It receives a GMP signal from the repeater and extracts the data from the GMP signal and transmits it to the Internet or other communication network, and a network connection device for modulating the data received from the Internet or other communication network to a GMP signal and transmitted to the repeater An apparatus for implementing wireless LAN using an IR system, IR transmitters respectively mounted in the plurality of cellular phones or network connection apparatuses may include a serial / parallel converter configured to convert turbo-coded data from the MSM into parallel data; A symbol mapping unit for receiving parallel data from the serial / parallel conversion unit and performing symbol symbol mapping on the M-ary PPM method to output the parallel data; A first code generator which receives a long code offset from the MSM and generates a time delay coefficient C _j ^(k) ; When the time delay coefficient C _j ^(k) is received from the first code generator, a time delay value C _j ^(k) × t _c is generated by delaying the time delay coefficient C _j ^(k) according to the pilot synchronization signal received from the MSM. A first code delay unit; And Upon receiving the symbol-mapped high-speed data through the symbol mapping unit and receiving a time delay value C _j ^(k) × t _c from the first code delay unit, the time delay value C _j ^(k) × and t _c ) using a NR system, characterized in that the pulse generator for modulating the symbol into a GMP signal and radiates to the repeater through an antenna. delete The method of claim 1, An IR receiver mounted in each of the plurality of cellular phones or network access apparatuses may include: a second code generator configured to receive a long code offset from the MSM and generate a time delay coefficient C _j ^(k) ; When the time delay coefficient C _j ^(k) is received from the second code generator, a time delay value C _j ^(k) × t _c is generated by delaying the time delay coefficient according to the pilot synchronization signal received from the MSM. A second code delay unit; A template generator configured to receive a time delay value C _j ^(k) × t _c from the second code delay unit and to generate a reference waveform using the value; A pulse correlator for demodulating a GPM signal using the reference waveform and repeatedly outputting a symbol when receiving a GPM signal from the repeater and receiving a reference waveform from the template generator; A pulse train integral processing unit which receives an integrated symbol from the pulse correlation unit and takes an integral value of all correlations; A symbol demapping unit for demapping the symbols integrated through the pulse train integration processing unit in an M-ary manner and outputting the demapping units; And And a parallel / serial conversion unit configured to receive high-speed data from the symbol demapping unit, convert the serial data into serial data, and output the serial data to the MSM.