KR20000041261A - Method for transmitting data by diffusion code - Google Patents

Method for transmitting data by diffusion code Download PDF

Info

Publication number
KR20000041261A
KR20000041261A KR1019980057096A KR19980057096A KR20000041261A KR 20000041261 A KR20000041261 A KR 20000041261A KR 1019980057096 A KR1019980057096 A KR 1019980057096A KR 19980057096 A KR19980057096 A KR 19980057096A KR 20000041261 A KR20000041261 A KR 20000041261A
Authority
KR
South Korea
Prior art keywords
data
spreading code
diffusion code
multiplying
transmitting data
Prior art date
Application number
KR1019980057096A
Other languages
Korean (ko)
Inventor
이미애
Original Assignee
구자홍
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 구자홍, 엘지전자 주식회사 filed Critical 구자홍
Priority to KR1019980057096A priority Critical patent/KR20000041261A/en
Publication of KR20000041261A publication Critical patent/KR20000041261A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
    • H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload

Abstract

PURPOSE: A method for transmitting data by a diffusion code is provided to supply information in real time and a secret protecting function preventing knowing contents, if the diffusion code is not known in spite of checking a data packet of a network, by multiplying transmitting data and the diffusion code together. CONSTITUTION: A method for transmitting data by a diffusion code comprises the steps of: summing up to make data's each bit to a packet, after multiplying each request data being transmitted to many terminals and diffusion codes according to each terminal; transmitting with a broadcast way so that all terminals connected to the network receive an objective address; and isolating original transmitting data by multiplying data and its own diffusion code together.

Description

확산 코드를 이용한 데이터 전송 방법Data transmission method using spreading code

본 발명은 확산 코드를 이용한 데이터 전송 방법에 관한 것으로, 특히 네트워크 컴퓨터를 이용한 케이블망에 확산코드에 의한 대역확산 통신기술을 적용하여 대역폭의 이용 효율을 크게 증가시키고 실시간으로 전송 및 데이터의 비화 특성을 가질 수 있도록 하는 확산 코드를 이용한 데이터 전송 방법에 관한 것이다.The present invention relates to a data transmission method using a spreading code, and in particular, by applying a spread spectrum communication technology using a spreading code to a cable network using a network computer, the bandwidth utilization efficiency is greatly increased and the secretion characteristics of transmission and data in real time are improved. It relates to a data transmission method using a spreading code to have.

일반적으로, 전자파는 공중에 사방으로 퍼져 나가므로 전자파 자체는 쉽게 다른 사람에 의해 적정한 안테나를 사용하여 수신될 수 있다.In general, since electromagnetic waves spread in the air in all directions, the electromagnetic waves themselves can be easily received by others using an appropriate antenna.

따라서, 수신 신호의 변조방법만 알면 쉽게 그 통화 내용을 도청할 수 있으며, 대개 보통 사용하는 변조방법은 쉽게 복조가 가능하므로 전자파를 이용한 무선통신은 쉽게 되청되었다.Therefore, it is easy to eavesdrop on the contents of the call only by knowing the modulation method of the received signal, and since the usual modulation method is easily demodulated, the wireless communication using the electromagnetic wave has been easily recalled.

그러나, 1960년대 부터 군사용으로 사용되어 온 주파수 대역확산 통신기술을 이용한 CDMA 방식은 확산 코드에 의하여 비화 특성을 높임으로써 도청이 어렵고 주파수 이용효율을 크게 증가시킬 수 있게 되었다.However, the CDMA method using the spread spectrum communication technology, which has been used for military use since the 1960s, is difficult to eavesdropping by increasing the secretion characteristics by spreading codes and greatly increases the frequency utilization efficiency.

도1은 CDMA방식의 확산코드에 의한 통신예를 보인 파형도로서, 이에 도시된 바와 같이 (a)와 같은 송신 데이터에 (b)와 같은 확산코드 10110100101을 곱해준다. 이때 확산코드는 원래의 데이터보다 훨씬 높은 비트 속도를 가지고 있으므로 하나의 송신 데이터에 여러개의 비트를 곱해준다.FIG. 1 is a waveform diagram showing an example of communication using a CDMA spreading code. As shown in FIG. 1, transmission data as shown in (a) is multiplied by spreading code 10110100101 as shown in (b). In this case, since the spreading code has a much higher bit rate than the original data, the spreading code multiplies several bits by one transmission data.

이와 같이 곱해진 원래의 송신 데이터는 (c)와 같이 훨씬 속도가 높은 확산코드와 같은 속도의 확산신호가 되고, 이 확산신호를 전자파에 실어서 송신을 하고 수신쪽에서는 이 확산신호에 다시 (d)와 같은 송신쪽에서 사용한 동일한 확산 코드를 곱해주면 (e)와 같이 원래 송신하고자 했던 데이터와 동일한 수신 데이터를 얻을 수 있게 된다.The original transmission data multiplied in this way becomes a spreading signal having the same speed as a spreading code which is much faster as shown in (c), and the spreading signal is loaded on the electromagnetic wave and transmitted to the spreading side (d). By multiplying the same spreading code used by the sender such as), as in (e), the same received data as the original data to be transmitted can be obtained.

도2는 네트워크 컴퓨터(NC)와 서버와의 데이터 전송과정을 보인 예시도로서, 서버는 네트워크 컴퓨터의 정보 요청에 의해 네트워크 컴퓨터가 네트워크에 연결되기 위해 필요한 여러 가지 값(NC의 아이피 어드레스, 게이트웨이 어드레스등.)과 NC가 부팅하는데 필요한 여러 가지 파라미터를 담은 특성화일(부팅에 필요한 OS image 및 브라우져를 포함한 각종 응용 프로그램 등)을 제공한다.FIG. 2 is an exemplary diagram illustrating a data transmission process between a network computer and a server. The server may include various values necessary for connecting the network computer to a network by requesting information from the network computer (the IP address and the gateway address of the NC). Etc.) and a specialization file containing various parameters needed for the NC to boot (OS image for booting and various applications including browser).

그러나, 상기 종래의 기술에 있어서는 한 번에 한 개의 단말이 서버에 정보를 요청할 수 있으며, 서버도 한 번에 하나의 단말에만 데이터를 제공함으로써 다른 여러 단말이 요청한 데이터를 한꺼번에 보낼 수 없는 문제점이 있었다.However, in the related art, one terminal may request information from a server at a time, and the server may not transmit data requested by several terminals at once by providing data to only one terminal at a time. .

따라서, 본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 창출한 것으로, 전송 데이터에 확산코드를 곱해 줌으로써 네트워크의 데이터 패킷을 검사하더라도 확산코드를 알지 못하면 어떠한 내용인지 알지못하는 비밀보호 기능을 가지며 실시간으로 정보를 제공할 수 있는 확산 코드를 이용한 데이터 전송 방법을 제공 하는데 그 목적이 있다.Therefore, the present invention was created to solve the above-mentioned conventional problems, and multiplies the transmission data by the spreading code so that even if the data packet of the network is checked, the spreading code does not know what the contents do not know. Its purpose is to provide a data transmission method using a spreading code that can provide information.

도1은 CDMA방식의 확산코드에 의한 통신예를 보인 파형도.1 is a waveform diagram showing an example of communication using a spreading code of a CDMA system.

도2는 네트워크 컴퓨터(NC)와 서버와의 데이터 전송과정을 보인 예시도.2 is an exemplary view showing a data transmission process between a network computer (NC) and a server.

도3은 본 발명 확산코드에 의한 데이터 전송 방법의 개념도.3 is a conceptual diagram of a data transmission method using a spreading code of the present invention;

이와 같은 목적을 달성하기 위한 본 발명은, 여러 단말장치로 전송될 각 요청 데이터를 각 단말에 따른 확산코드로 곱한 후 데이터의 각 비트를 합하여 하나의 패킷으로 만드는 단계와; 목적 어드레스를 네트워크에 연결된 모든 단말장치가 받을 수 있도록 브로드캐스트 방식으로 전송하는 단계와; 상기 단계를 통해 전송된 데이터를 받아서 자신의 확산코드를 곱해 원래의 전송 데이터를 분리해내는 단계로 이루어짐으로써 달성되는 것으로, 본 발명에 따른 실시예를 첨부된 도면을 참조하여 상세히 설명하면 다음과 같다.The present invention for achieving the above object comprises the steps of multiplying each request data to be transmitted to the various terminal devices by a spreading code according to each terminal, and then combining each bit of the data into one packet; Transmitting the destination address in a broadcast manner so that all terminal devices connected to the network can receive the destination address; It is achieved by the step of receiving the data transmitted through the above step and multiplying its own spreading code to separate the original transmission data, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings. .

도3은 본 발명 확산코드에 의한 데이터 전송 방법의 개념도로서, 이에 도시한 바와 같이 서버에서 임의의 단말1로 보내는 전송 데이터(S1(t))에 고유의 확산코드(C1(t))를 곱하고, 임의의 단말2로 보내는 전송 데이터(S2(t))에 고유의 확산코드(C2(t))를 곱한후 이들의 합을 네트워크를 통해 브로드캐스팅 방식으로 전송한다.3 is a conceptual diagram of a data transmission method using a spreading code of the present invention. As shown in FIG. 3, the transmission data S1 (t) sent from a server to an arbitrary terminal 1 is multiplied by a unique spreading code C1 (t). After multiplying the unique spreading code C2 (t) by the transmission data S2 (t) sent to an arbitrary terminal 2, the sum is transmitted through a network through a broadcasting method.

이에 따라 각 단말(단말1,단말2)에서는 상기 데이터에 자신의 고유 확산 코드를 곱하여 자신에게 전송된 데이터를 복원하게 된다.Accordingly, each terminal (terminal 1, terminal 2) multiplies the data by its own spreading code to restore the data transmitted to itself.

즉, 단말1은 상기 데이터(S1(t)·C1(t) + S2(t)·C2(t))에 자신의 고유 확산코드(C1(t))를 곱하면 C1(t)·C1(t)=1 이 되고, C2(t)·C1(t)=0 이 되어 결국 단말1로 전송된 데이터(S1(t))를 제외한 나머지는 0이 되므로 서버가 자신에게 보내는 데이터(S1(t))를 수신하게 된다.That is, the terminal 1 multiplies the data S1 (t), C1 (t) + S2 (t), C2 (t) by its own spreading code C1 (t), and C1 (t) C1 ( t) = 1, and C2 (t) and C1 (t) = 0, and the data other than the data S1 (t) transmitted to the terminal 1 becomes 0, so that the server sends the data (S1 (t) )).

또한, 단말2도 역시 상기 데이터(S1(t)·C1(t) + S2(t)·C2(t))에 자신의 고유 확산코드(C2(t))를 곱하면 C1(t)·C2(t)=0 이 되고, C2(t)·C2(t)=1 이 되어 결국 단말2로 전송된 데이터(S2(t))를 제외한 나머지는 0이 되므로 서버가 자신에게 보내는 데이터(S2(t))를 수신하게 된다.Also, the terminal 2 also multiplies the data S1 (t), C1 (t) + S2 (t), C2 (t) by its own spreading code C2 (t), and C1 (t) and C2. (t) = 0 and C2 (t) and C2 (t) = 1 and the rest of the data (S2 (t)) except for the data S2 (t) sent to the terminal 2 becomes 0. t)).

이때 확산코드는 전송 데이터와는 아무런 관계도 없으며 확산코드를 추정하기 곤란하게 거의 잡음과 같은(디지탈 신호인 경우 랜덤 시퀀스)신호를 곱해주며, 이 코드는 거의 무한히 만들 수 있기 때문에 임의의 확산코드를 쉽게 재생할 수 없다.In this case, the spreading code has nothing to do with the transmitted data and multiplies the signal almost like noise (random sequence in the case of digital signal), making it difficult to estimate the spreading code. It cannot be played easily.

이상에서 설명한 바와 같이 본 발명 확산 코드를 이용한 데이터 전송 방법은 전송 데이터에 확산코드를 곱해 줌으로써 네트워크의 데이터 패킷을 검사하더라도 확산코드를 알지 못하면 어떠한 내용인지 알지못하는 비밀보호 기능을 가지며 실시간으로 정보를 제공할 수 있는 효과가 있다.As described above, the data transmission method using the spreading code of the present invention multiplies the spreading code by the spreading data, and has a secret protection function that does not know what the contents do not know even if the spreading code is not known even if the data packet of the network is checked. It can work.

Claims (1)

여러 단말장치로 전송될 각 요청 데이터를 각 단말에 따른 확산코드로 곱한 후 데이터의 각 비트를 합하여 하나의 패킷으로 만드는 단계와; 목적 어드레스를 네트워크에 연결된 모든 단말장치가 받을 수 있도록 브로드캐스트 방식으로 전송하는 단계와; 상기 단계를 통해 전송된 데이터를 받아서 자신의 확산코드를 곱해 원래의 전송 데이터를 분리해내는 단계로 이루어진 것을 특징으로 하는 확산 코드를 이용한 데이터 전송 방법.Multiplying each request data to be transmitted to various terminal devices by a spreading code according to each terminal, and then combining each bit of the data into a single packet; Transmitting the destination address in a broadcast manner so that all terminal devices connected to the network can receive the destination address; Receiving the data transmitted through the step and multiplying its own spreading code to separate the original transmission data.
KR1019980057096A 1998-12-22 1998-12-22 Method for transmitting data by diffusion code KR20000041261A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019980057096A KR20000041261A (en) 1998-12-22 1998-12-22 Method for transmitting data by diffusion code

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019980057096A KR20000041261A (en) 1998-12-22 1998-12-22 Method for transmitting data by diffusion code

Publications (1)

Publication Number Publication Date
KR20000041261A true KR20000041261A (en) 2000-07-15

Family

ID=19564498

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019980057096A KR20000041261A (en) 1998-12-22 1998-12-22 Method for transmitting data by diffusion code

Country Status (1)

Country Link
KR (1) KR20000041261A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470138A (en) * 1982-11-04 1984-09-04 The United States Of America As Represented By The Secretary Of The Army Non-orthogonal mobile subscriber multiple access system
US5218619A (en) * 1990-12-17 1993-06-08 Ericsson Ge Mobile Communications Holding, Inc. CDMA subtractive demodulation
US5568472A (en) * 1992-11-04 1996-10-22 Ntt Mobile Communications Network Inc. Code division multiple access mobile communication system
US5602832A (en) * 1993-09-22 1997-02-11 Northern Telecom Limited Receiver device for code division multiplex communication system
KR19980034535A (en) * 1996-11-07 1998-08-05 양승택 Terminal Matching Device Supporting Multiple Users in Code Division Multiple Access System and Call Setup Method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4470138A (en) * 1982-11-04 1984-09-04 The United States Of America As Represented By The Secretary Of The Army Non-orthogonal mobile subscriber multiple access system
US5218619A (en) * 1990-12-17 1993-06-08 Ericsson Ge Mobile Communications Holding, Inc. CDMA subtractive demodulation
US5568472A (en) * 1992-11-04 1996-10-22 Ntt Mobile Communications Network Inc. Code division multiple access mobile communication system
US5602832A (en) * 1993-09-22 1997-02-11 Northern Telecom Limited Receiver device for code division multiplex communication system
KR19980034535A (en) * 1996-11-07 1998-08-05 양승택 Terminal Matching Device Supporting Multiple Users in Code Division Multiple Access System and Call Setup Method

Similar Documents

Publication Publication Date Title
AU2007200679B2 (en) Use of orthogonal or near orthogonal codes in reverse link
Miyagaki et al. Error probability characteristics for CPSK signal through m-distributed fading channel
US20020009068A1 (en) Method for allowing multi-user orthogonal and non-orthogonal interoperability of code channels
CA2450601A1 (en) System and method for compressing secure e-mail for exchange with a mobile data communication device
FR2577090A1 (en) RADIOCOMMUNICATION SYSTEM
KR950002282A (en) Spread spectrum communication system
EP0767563A3 (en) Method and apparatus for multiprotocol operation in a client/server system
EP1027779A1 (en) Rapidly decorrelating spreading sequences for ds-cdma transceivers
Utlaut Spread spectrum: Principles and possible application to spectrum utilization and allocation
JPH09504670A (en) Spread spectrum spectral density technology
JP2000134182A (en) Cdma transmitter and method for generating coupled high-speed/low-speed cdma signal
GB2380099B (en) Opportunistic transmission of portably stored digital data
JP3210918B2 (en) Apparatus for enabling various spreading factors while maintaining a common scrambling code, especially for transmission in a code division multiple access cellular mobile radio system
CN110351394B (en) Network data processing method and device, computer device and readable storage medium
KR20000041261A (en) Method for transmitting data by diffusion code
JPH10257012A (en) Communication method, transmitter and receiver
US20050249136A1 (en) Dynamic assignment of station addresses transmitted over shared-communications channels
CA2401738A1 (en) Network resource communication system
Gupta et al. Land mobile radio systems-a tutorial exposition
KR100438074B1 (en) Generation method of cryptography code in IP Keyphone terminal and data cryptography method
WO1999016176A3 (en) Communication system
CN215956405U (en) Gateway equipment, system, electronic terminal, server and enterprise intranet access device
US20030046428A1 (en) Method for generating domain name for device intermittently connected to fixed network
JP2002525907A (en) Apparatus and method for forming an integrated signal, apparatus and method for forming a current signal and a first communication signal, and communication system and method for transmitting a first integrated signal and a second integrated signal
GB0201728D0 (en) Data transmission systems

Legal Events

Date Code Title Description
N231 Notification of change of applicant
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application