KR100794124B1 - Time-based data coding/decoding apparatus and method for transmitting data in wireless communication system - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a time-based encoding / decoding apparatus for data transmission in a wireless communication system, a method thereof, and a computer-readable recording medium having recorded thereon a program for realizing the method.

2. The technical problem to be solved by the invention

According to the present invention, a communication method in which the system capacity is limited by mutual interference by enabling a data transmission with a smaller number of signal transmissions for the same amount of data transmission by using a coding scheme using a difference in transmission time point of a transmission signal Time-based encoding / decoding device that enables system to increase capacity of system and minimizes power consumption for data transmission, and computer readable recording of method and method for realizing the method To provide media.

3. Summary of Solution to Invention

The present invention is a time-based encoding and decoding apparatus for data transmission in a wireless communication system, according to a data transmission request from a user, the data to be transmitted is actually divided into data to be transmitted and first time slot information, and data to be actually transmitted. A transmitter for performing the encryption, encoding, and modulation functions required to transmit the data to a time slot designated according to the first time slot information; And decryption, decryption, and demodulation functions in the reverse order to the processing of the encryption, encoding, and modulation functions performed by the transmitter by combining the signal transmitted through the transmitter with the second time slot information when the signal arrives. And a receiver for restoring original data based on the extracted data and the second time slot information.

4. Important uses of the invention

The present invention is used in a wireless communication system.

CDMA, Coding, Coding, Decoding, Time Based, Transmission Point Of View Difference, Communication

Description

Time-based data coding / decoding apparatus and method for transmitting data in wireless communication system for wireless data transmission system             

1A and 1B are explanatory diagrams comparing the data coding method of the conventional radio section with the data coding method of the present invention, respectively.

2 is a diagram illustrating an embodiment of a data transmission frame for data transmission in a wireless section in a wireless communication system according to the present invention.

3 is a block diagram of an embodiment of a time-based encoding and decoding apparatus for data transmission in a CDMA system according to the present invention.

4 is a flowchart illustrating an embodiment of a time-based encoding method for data transmission according to the present invention.

5 is a flowchart illustrating an embodiment of a time-based decoding method for data transmission according to the present invention.

* Explanation of symbols for the main parts of the drawings

31: transmitting unit 311: data separation module

312 channel encoding module 313 multi-access encoding module

314: signal modulation module 315: transmission device

32: receiver 321: receiver

322: signal demodulation module 323: multiple access decoding module

324: channel decoding module 325: data recovery module

The present invention is currently being used in the wireless subscriber network (WLL), broadband wireless subscriber network (B-WLL), mobile telephone network (Cellullar), personal mobile communication network (PCS), intelligent transportation network (ITS), other mobile telephone networks used in foreign countries, Capacity of available system in wireless communication system including next generation mobile communication network such as International Mobile Telecommunication-2000 (IMT-2000), Universal Mobile Telecommunication Service (UMTS), etc. A time-based encoding / decoding device for data transmission and a computer-readable recording medium recording thereon a program for realizing the method, which enables the increase and minimizes the power consumed for data transmission. It is about.

In CDMA-based systems, all users share frequency, multiple access methods are provided by transmit power, and each user is distinguished by different orthogonal codes. Therefore, in the CDMA-based system, in order to efficiently provide various services, data requiring different transmission rates and quality of service requirements are spread and transmitted simultaneously in different orthogonal codes within the same bandwidth. In a communication system whose capacity is limited by such mutual interference, signals from other users within the same frequency are recognized as noise.

In a conventional CDMA system such as an IMT-2000 system, channel coding is performed using a convolutional code or the like for data error correction, and a PN code or Walsh is used to distinguish it from other users' data. After performing multi-access coding with an orthogonal code such as) code, the data is transmitted as a signal using a signal modulation method using a phase difference of a signal such as binary phase-shift keying (BPSK) or quadrature phase-shift keying (QPSK). It was. However, the previous methods of encoding or modulation did not use information on the transmission time of the transmitted signal.

As such, a method for increasing the capacity of the system and minimizing the power consumed for data transmission is required by using a coding scheme using a difference in time-based transmission signals than the conventional data coding method.

The present invention has been proposed in order to meet the above-described demands, and it is possible to transmit data with fewer times of signal transmission for the same amount of data transmission by using a coding scheme using a difference in transmission time of a transmission signal. By using the above method, a time-based encoding / decoding apparatus and method and method for enabling capacity increase of a system in a communication system where system capacity is limited by mutual interference and minimizing power consumed for data transmission are provided. An object of the present invention is to provide a computer-readable recording medium having recorded thereon a program for realizing this.

In accordance with an aspect of the present invention, a time-based encoding and decoding apparatus for data transmission in a wireless communication system includes data to be transmitted and first time slot information to be transmitted according to a data transmission request from a user. A transmitter for separating and performing an encryption, encoding, and modulation function necessary for actually transmitting the data to be transmitted, and transmitting the processed data to a designated time slot according to the first time slot information; And decryption, decryption, and demodulation functions in the reverse order to the processing of the encryption, encoding, and modulation functions performed by the transmitter by combining the signal transmitted through the transmitter with the second time slot information when the signal arrives. And a receiver for restoring original data based on the extracted data and the second time slot information.

In addition, the present invention, in the time-based encoding apparatus for data transmission in a wireless communication system, according to the data transmission request from the user, for separating the data to be transmitted according to the unit data unit of the actual data to be transmitted and time slot information Data separation means; Channel encoding means for channel encoding the actual data to be transmitted received from the data separating means and transmitting the encoded data and the time slot information; Multi-access encoding means for multi-access encoding the channel-coded data received from the channel encoding means and transmitting the multi-access encoded data and the time slot information; Signal modulating means for modulating the multi-access coded data received from the multi-access coding means and transmitting the modulated data and the time slot information; And transmitting means for transmitting the modulated data received from the signal modulating means according to the time slot information.

The present invention also provides a time-based decoding apparatus for data transmission in a wireless communication system, comprising: receiving means for receiving a signal from an external device and obtaining time slot information corresponding to a reception time of a corresponding received signal; Signal demodulating means for demodulating the signal received from the receiving means and transmitting the demodulated data and the time slot information; Multi-access decoding means for multi-access decoding the demodulated data received from the signal demodulation means and transmitting the multi-access decoded data and the time slot information; Channel decoding means for channel decoding the multi-access decoded data received from the multi-access decoding means and transmitting the channel decoded data and the time slot information; And data restoring means for restoring original data based on the channel decoded data and the time slot information received from the channel decoding means.

Meanwhile, the present invention is a time-based encoding and decoding method for data transmission applied to a wireless communication system. In accordance with a data transmission request from a user, the data to be transmitted is actually divided into data to be transmitted and first time slot information. A first step of performing an encryption, encoding, and modulation function necessary for actually transmitting data to be transmitted, and transmitting the processed data to a designated time slot according to the first time slot information; And combining the signal transmitted in the first step with the second time slot information when the signal arrives to perform the decryption, decryption, and demodulation functions in the reverse order to the processing of the encryption, encoding, and modulation functions performed. And restoring original data based on the extracted data and the second time slot information.

In addition, the present invention, in the time-based encoding method for data transmission applied to the wireless communication system, according to the data transmission request from the user, the data to be transmitted is divided into the actual data and time slot information to be transmitted according to the unit data unit A first step of making; Channel coding the separated actual transmission data; A third step of multi-access coding the channel coded data; Modulating the multi-access coded data; And a fifth step of transmitting the modulated data according to the time slot information.

In addition, the present invention, in the time-based decoding method for data transmission applied to the wireless communication system, a first step of receiving a signal transmitted from the outside and obtaining time slot information corresponding to the reception time of the received signal ; Demodulating the received signal; A third step of multi-access decoding the demodulated data; A fourth step of channel decoding the multi-access decoded data; And a fifth step of restoring original data based on the channel decoded data and the time slot information.

On the other hand, the present invention, in the wireless communication system having a processor, according to a request for data transmission from the user, the data to be transmitted is actually separated into data to be transmitted and first time slot information, and encryption required to transmit data to be actually transmitted; A first function of performing a coding and modulation function to transmit the processed data to a designated time slot according to the first time slot information; And combining the signal transmitted from the first function with the second time slot information when the signal arrives to perform the decryption, decryption, and demodulation functions in the reverse order to the processing of the encryption, encoding, and modulation functions performed. A computer-readable recording medium having recorded thereon a program for realizing a second function of restoring original data based on the extracted data and the second time slot information.

The present invention also provides a wireless communication system including a processor, comprising: a first function of separating data to be transmitted into data and time slot information according to a unit data unit according to a data transmission request from a user; A second function of channel coding the separated actual transmission data; A third function of multi-access coding the channel coded data; A fourth function of modulating the multi-access coded data; And a computer readable recording medium having recorded thereon a program for realizing a fifth function of transmitting the modulated data according to the time slot information.

The present invention also provides a wireless communication system having a processor, comprising: a first function of receiving a signal transmitted from the outside and obtaining time slot information corresponding to a reception time of the received signal; A second function of demodulating the received signal; A third function of multiple access decoding the demodulated data; A fourth function of channel decoding the multi-access decoded data; And a computer-readable recording medium having recorded thereon a program for realizing a fifth function of restoring original data based on the channel decoded data and the time slot information.

The present invention divides data to be transmitted in a transmission side communication system into a signal and time slot information, and transmits a signal in a specific time slot according to the time slot information, and in the communication system on the receiving side, the received signal and the signal are received. The original data is restored by combining the time slot information.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In general, the transmission quality in a communication system whose capacity is limited by mutual interference, such as a CDMA system, is defined as E _b / N ₀ , which is a signal strength-to-noise period ratio. Equation 1] can be defined.

In Equation 1 above, E _b / N ₀ is Is the ratio between signal strength and noise strength, T is the transmit power magnitude, L is the path loss of the signal transmitted from the receiver, G is the antenna gain, and I is the noise and interference signal of the same band. interference, and F means a processing gain or spreading factor in the CDMA system. I , the cause of quality degradation, consists of white noise and other users' signals transmitted in the same band.

Therefore, in a communication system where capacity is limited by mutual interference, such as a CDMA system, if the same amount of data transmission is possible with fewer signal transmissions than conventional methods, the amount of usable system can be reduced by reducing mutual interference in the system. Not only can it increase, it also minimizes the power consumed for data transmission.

1A and 1B are explanatory diagrams comparing the data coding method of the conventional wireless section and the data coding method of the present invention, respectively. Examples of the conventional data coding method and the data coding method proposed by the present invention are shown in the wireless section. For comparison.

It is assumed that the duration of the time slot in FIG. 1A and the duration of the time slot in FIG. 1B are the same. 1A is an example using a conventional method using BPSK, which is a basic binary signal coding method in which a signal has only a value of "0" or "1". This example is a case of transmission from a mobile terminal to a base station, and each terminal transmits eight signals by transmitting eight signals during a time period consisting of eight time slots. In FIG. 1A, the terminal 1 transmits a value of binary “1000”, that is, “8” in decimal for the first unit data time. In FIG. 1A, the unit data is 4 bits, and the unit data time is composed of four time slots.

1B is an example of applying the present invention to data signal coding. In this case, the BPSK method is also used, and each terminal transmits one signal during a time period consisting of eight time slots, thereby transmitting four bits of information. In this case, time is divided into eight time slots, and a combination of each transmitted signal value and a time slot through which the signal is transmitted corresponds to one value that 4 bits of information can have. Therefore, each terminal can transmit data by combining the transmitted signal and the number of the transmitted time slot by sending a specific signal to the time slot corresponding to the actual data value instead of the actual data. For example, the terminal 1 transmits a signal of the binary number "1" to the "000" time slot in order to transmit the binary number "1000" during the first unit data time. In the base station receiving this signal, it is possible to recover the information of the binary number "1000" by combining the signal of the binary number "1" and the time slot number "000" in which the signal was received. In FIG. 1B, the unit data is also 4 bits, and the unit data time is composed of eight time slots. In this example, the data to be transmitted is simply separated and transmitted. However, only a part of the data to be transmitted is transmitted as a signal, and the remaining data is not necessarily transmitted as time slot information, but a combination of a transmitted signal and time slot information through which the signal is transmitted. All you need to do is restore the original data. Thus, the example of simple separation in FIG. 1 is only one embodiment of the present invention.

As shown in the examples of FIGS. 1A and 1B, in the conventional method, four signals must be transmitted for transmission of 4 bits. However, when the present invention is applied, transmission is possible using only one signal. Do. Thus, fewer signals are used to transmit the same amount of information, thereby reducing mutual interference in the system. This reduction in mutual interference means an increase in capacity in a communication system in which the capacity of the system is limited by mutual interference, such as a CDMA system.

Therefore, as shown in Figs. 1A and 1B, when the present invention is applied during the same time, the data can be transmitted only 1/2 of the conventional method. Since the mutual interference is reduced to 1/8, the E _b / N ₀ value is increased in Equation 1, and the capacity is increased by about 8 times. As a result, 4 times as much data transmission as using the conventional method. This is possible. Thus, applying the present invention provides a fourfold increase in capacity throughout the system. In addition, in this example, since the number of signals to be transmitted for data transmission in the terminal is reduced, power consumption for data transmission of the terminal can be reduced to about 1/4.

1A and 1B illustrate an example of data transmission from a terminal to a base station, it is obvious that data transmission from the base station to the terminal can be performed in the same manner.

Generalizing the improvement in efficiency of such a system can be summarized as follows. First, it is assumed that the wireless communication system uses a signal having N values. For example, if the signal uses a modulation method such as BPSK with two values of "0" and "1", N becomes "2". It is assumed, and when referred to the present invention the C a number of data units per time slot to apply C = N ^{-1 β} dogs that use the conventional method of transmitting the β signal for a unit time data, β = _(N log C Has a relationship of +1).

In order to compare the performance of data transmission using the conventional method and data transmission according to the present invention, assuming that the time slots for the two cases have the same time length and transmit data for the same time, the data according to the present invention is applied. The transmission method transmits β / C times data in the case of applying the conventional method, and on average, generates only 1 / C of mutual interference, thereby providing C times increase in capacity. Thus, the capacity increase in the resulting data transmission is β times. In addition, since only a 1 / β signal is required for the same amount of data transmission, since the power consumption for data transmission can be reduced to about 1 / β in a terminal, a mobile terminal having a limited power source in which power saving is an important problem. It is possible to further increase the operating time of.

In the case of a data transmission service to which the present invention is applied, if only one channel is used and time slots having the same length as the conventional method are used, a transmission time may be longer than that of the conventional method in order to transmit the same amount of data. This problem can be solved by allocating more than one channel to one service at the same time and transmitting them at the same time or by using shorter data slots.

FIG. 2 is a diagram illustrating an embodiment of a data transmission frame for data transmission in a wireless section in a wireless communication system according to the present invention. Although only an example of transmission from a terminal to a base station is described. It is obvious that the same can be applied.

As shown in FIG. 2, data transmission in a wireless section is performed in data frame units, and one transmission frame is composed of one or more unit data. When the data to be transmitted requires an acknowledgment signal, an acknowledgment signal (Ack) for the data transmission frame transmitted from the receiving side is received after transmitting one transmission frame. Each time slot in one unit data is calculated as a relative time after receiving S, which is a synchronization signal from a base station. Generally, the synchronization signal is broadcast periodically from a base station to a terminal group consisting of all base stations or a plurality of terminals in a corresponding cell, and there is no need to transmit a signal for each individual terminal. This synchronization signal is also broadcast from the base station to the terminals upon data transmission from the base station to the terminals. In FIG. 2, one synchronization signal is transmitted for each unit data, but it is not necessary to correspond one-to-one, and only one synchronization signal may be transmitted for several unit data, and one or more synchronization signals may be transmitted to one unit data. May be used.

3 is a diagram illustrating an embodiment of a time-based encoding and decoding apparatus for data transmission in a CDMA system according to the present invention.

As shown in FIG. 3, the time-based encoding and decoding apparatus for data transmission according to the present invention includes a transmitter 31 and a receiver 32.

First, the transmitter 31 of the encoding apparatus includes a data separation module 311 for separating original data into data to be transmitted and time slot information, a channel encoding module 312 for error correction and inspection, The apparatus includes a multiple access encoding module 313, a signal modulation module 314, and a transmitter 315 for distinguishing between different channels.

Next, the receiver 32 of the decoding apparatus includes a receiver 321, a signal demodulation module 322, a multiple access decoding module 323, and a channel decoding ( channel decoding) module 324 and a data recovery module 325 for restoring the original data separated by the data separation module 311 of the transmitter 31.

Now, operations of the time-based encoding and decoding apparatus for data transmission according to the present invention having the above-described structure will be described in detail as follows.                     

When the transmission unit 31 receives a data transmission request from the user, the data separation module 311 divides the data to be transmitted by dividing the data into unit data units, that is, β bits, into one data packet by actually transmitting data and time slot information. It makes a transmission to the channel encoding module 312. In other words, when the amount of data that can be a modulation method of the system to send to the one of the signal lines K-bit (bit), the rest actually transmits only particular K-bit in the data of β bits, except for the data β - K bit (bit ) Data is transmitted to the channel encoding module 312, which is the next step, in a single packet together with the data to be transmitted as time slot information instead of the actual transmission. For example, in the case of using the BPSK in the case of using a QPSK only a specific one bit in the bit data β, is actually transmitted only certain β 2 bits in the bit data and the other data is a time slot information.

The channel encoding module 312 performs channel encoding using only a convolutional code or another channel encoding method on only the data portion to be actually transmitted among the received data packets, and retains the time slot information received together with the encoded data. The packet is bundled into one packet and transmitted to the multi-access coding module 313.

Such data separation and channel encoding may be performed by one module, by a program written in software, or by configuring a dedicated electronic circuit device to reduce processing time. An example of a configuration of the dedicated electronic circuit, loading the data constituting the series and β-bit parallel input and output possible shift register (shift register) for receiving data having a length of β bits and sent to the register using a parallel input circuit After loading, a shift operation is performed to extract only the leftmost (or right) K bits, and after encoding using a conventional channel encoding circuit, only one uncoded β - K bit of data The packet is bundled into packets and transmitted to the multi-access coding module 313.

The multi-access coding module 313 encodes only the coded data portion of the received data packet using PN (Pseudo random) code or Walsh code, and retains the time slot information received with the multi-access coded data as it is. The packet is transmitted to the signal modulation module 314.

The signal modulation module 314 modulates only the encoded data portion of the received packet using BPSK, QPSK, or another modulation method, and bundles the modulated signal into one packet together with the received time slot information. To send).

Then, the transmitter 315 transmits only the modulated data portion of the received packet through the wireless transmission medium according to time slot information of the same packet.

On the other hand, the receiving unit 32 transmits the signal received by the receiving device 321 and the slot number corresponding to the received time of the received signal as the time slot information, bundled into one packet, and transmitted to the signal demodulation module 322, and the signal The demodulation module 322 demodulates the received signal and bundles the demodulated data and the received time slot information into one packet and transmits the demodulated data to the multi-access decoding module 323. The multiple access decoding module 323 decodes the received signal and transmits the decoded data and the received time slot information into one packet to the channel decoding module 324. The channel decoding module 324 decodes the signal and bundles the decoded data and the received time slot information into one packet and transmits the decoded data to the data recovery module 325. The data restoration module 325 restores the original data in the reverse order of the data separation method in the data separation module 31 of the transmitter 31 based on the decoded data and the received time slot information.

4 and 5 are flowcharts illustrating one embodiment of a control method for data transmission in a transmitting apparatus and a receiving apparatus of a communication system (CDMA system) that play an important role in a time-based encoding and decoding method according to the present invention. Let's do it.

4 is a flowchart illustrating an embodiment of a time-based encoding method for data transmission according to the present invention.

As shown in FIG. 4, in the CDMA system, which is a representative example of a communication system in which capacity is limited by mutual interference, a time-based encoding method for data transmission at a transmitter according to the present invention includes data and time for actually transmitting data to be transmitted. The data is divided into slot information (401, 402), and processing such as encryption, encoding, and modulation necessary for transmission (403, 404, 405) is performed on the actual data to be transmitted, and the "403", "404", "405" And transmitting the data processed in the process to the receiving unit in the designated time slot according to the time slot information (406 to 409).

In more detail, when there is no data to be transmitted, the transmitter waits for a data transmission request (401). When the data transmission request is received, the data separation module separates the data to be transmitted and time slot information into one packet in the same manner as described in the embodiments of FIGS. 1B and 3, and combines the data into one packet. In step 402, the channel encoding module is transmitted.

Subsequently, when the channel encoding module separates only the actual data to be transmitted from the received packet and performs channel encoding, the channel encoding module bundles the data together with the time slot information of the received packet and transmits the result to the multi-access encoding module (403). The multi-access coding method separates only the channel-coded data from the received data packet and transmits the received data packet to the signal modulation module by binding the packet to the signal modulation module together with time slot information of the received packet.

Then, the signal modulation module separates and modulates only the multi-access coded data portion from the received packet, and transmits the packet to the transmitting apparatus by binding a packet together with time slot information of the received packet (step 405).

The transmitting device separates the received data packet into modulated data and time slot information, stores the time slot information value in a time slot information variable, and waits for a synchronization signal from the base station as described in the example of FIG. 2 (406). .

Thereafter, the time slot information is searched to determine whether the time slot information is "0" (407). Otherwise, whenever time corresponding to one time slot length elapses after the synchronization signal, the time slot information variable Decreases the time slot information variable value by "1" until "0" is 408, and then repeats the process of retrieving the time slot information (407), and if the time slot information variable is "0", After transmitting the modulated signal in the time slot of 409, the process proceeds to waiting for a data transmission request (401). In this case, when the synchronization signal reception can be performed in parallel with the data processing, it is not necessary to wait for the synchronization signal before the data transmission in the process "406", and the number of time slots that have passed after the synchronization signal reception has elapsed time slot information variable. If smaller, the number of time slots that have elapsed from the value of the slot information variable may be subtracted and then sent to the process "407".

5 is a flowchart illustrating an embodiment of a time-based decoding method for data transmission according to the present invention.

As shown in FIG. 5, in the time-based decoding method for data transmission in the receiver according to the present invention, when a signal from the transmitter is received, the received signal and time slot information when the signal arrives are obtained. (501 to 505), decryption, decryption, demodulation, and the like are performed in the reverse order to the processing such as encryption, encoding, and modulation performed by the transmitter (506 to 508). The original data is restored based on the data extracted through the processes “506” to “508” and the time slot information obtained in the reception processes 501 to 505 (509).

In more detail, the receiver waits for a synchronization signal first (501). Subsequently, when the synchronization signal is received, the receiving apparatuses of each receiving side including the base station and the terminal reset all time slot information variables to "0" and wait for a signal from the transmitting unit to which the call is set (502).

After that, if the signal from the transmitter has arrived (503) and the signal is not received, the time slot information variable is incremented by "1" each time a time corresponding to one time slot length elapses after the synchronization signal. After the signal has been received (504), the process proceeds to step 503 of checking whether the signal has arrived from the transmitting side. If the signal is received from the transmitting side, the time slot information variable value when the signal arrives is timed together with the received signal. As the slot information, the packet is made into one packet and transmitted to the signal demodulation module (505).

Subsequently, in the signal demodulation module, as described in the example of FIG. 3, the signal demodulation module separates and demodulates the received signal from the received packet, multi-accesses the demodulated data and time slot information of the received packet into one packet. Transmitting to the decoding module (506). Then, the multi-access decoding module separates the demodulated data from the received packet, multi-access decoding, and bundles the decoded data and time slot information of the received packet into one packet and transmits it to the channel decoding module (507).

Accordingly, the channel decoding module separates the multi-access decoded data from the received packet and performs channel decoding. The channel decoding module bundles the decoded data and time slot information of the received packet into one packet and transmits the decoded data to the data recovery module (508). Then, based on the decoded data and the received time slot information, the data recovery module restores the original data in the reverse order of the data separation method in the data separation module of the transmitting side as described in the embodiments of FIGS. 1B and 3. After the restoration (509), the process repeatedly repeats the process waiting for the synchronization signal (501).

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary skill.

The present invention as described above, by using the data coding scheme that uses the difference in the transmission time of the transmission signal and at the same time to transmit the same amount of data, by enabling the data transmission with a smaller number of signal transmissions In a communication system in which system capacity is limited by mutual interference, such as CDMA system, it is possible to increase system capacity and minimize power consumption for data transmission.

Claims (14)

In the time-based encoding and decoding apparatus for data transmission in a wireless communication system, According to a data transmission request from a user, the data to be transmitted is actually divided into data to be transmitted and first time slot information, and the data processed by performing the encryption, encoding, and modulation functions required to transmit data to be actually transmitted is processed to the first time. A transmitter for transmitting in a designated time slot according to the slot information; And The decryption, decryption, and demodulation functions are combined in the reverse order of the processing of the encryption, encoding, and modulation functions performed by the transmitter by combining the signal transmitted through the transmitter with the second time slot information when the signal arrives. Receiving apparatus for restoring the original data based on the extracted data and the second time slot information Apparatus for encoding and decoding based on time for data transmission comprising a. The method of claim 1, The transmitting device, Data separation means for separating data to be transmitted according to a unit data unit according to a data transmission request from a user into actual data to be transmitted and the first time slot information; Channel encoding means for channel encoding the actual data transmitted from the data separating means and transmitting the encoded data and the first time slot information; Multi-access encoding means for multi-access encoding the channel-coded data received from the channel encoding means and transmitting the multi-access encoded data and the first time slot information; Signal modulation means for modulating the multi-access coded data received from the multi-access coding means and transmitting the modulated data and the first time slot information; And Transmitting means for transmitting the modulated data received from the signal modulating means according to the first time slot information; Apparatus for encoding and decoding based on time for data transmission comprising a. The method according to claim 1 or 2, The receiving device, Receiving means for receiving a signal transmitted from the transmitting apparatus and obtaining the second time slot information corresponding to a reception time of the corresponding received signal; Signal demodulating means for demodulating the signal received from the receiving means and transmitting the demodulated data and the second time slot information; Multi-access decoding means for multi-access decoding the demodulated data received from the signal demodulation means and transmitting the multi-access decoded data and the second time slot information; Channel decoding means for channel decoding the multi-access decoded data received from the multi-access decoding means and transmitting the channel decoded data and the second time slot information; And Data restoring means for restoring original data based on the channel decoded data and the second time slot information received from the channel decoding means. Apparatus for encoding and decoding based on time for data transmission comprising a. A time-based encoding apparatus for data transmission in a wireless communication system, Data separation means for separating data to be transmitted into data to be actually transmitted and time slot information according to a unit data unit according to a data transmission request from a user; Channel encoding means for channel encoding the actual data to be transmitted received from the data separating means and transmitting the encoded data and the time slot information; Multi-access encoding means for multi-access encoding the channel-coded data received from the channel encoding means and transmitting the multi-access encoded data and the time slot information; Signal modulating means for modulating the multi-access coded data received from the multi-access coding means and transmitting the modulated data and the time slot information; And Transmitting means for transmitting the modulated data received from the signal modulating means according to the time slot information Time-based encoding device for data transmission comprising a. A time-based decoding apparatus for data transmission in a wireless communication system, Receiving means for receiving a signal from an external device and obtaining time slot information corresponding to a reception time of the corresponding received signal; Signal demodulating means for demodulating the signal received from the receiving means and transmitting the demodulated data and the time slot information; Multi-access decoding means for multi-access decoding the demodulated data received from the signal demodulation means and transmitting the multi-access decoded data and the time slot information; Channel decoding means for channel decoding the multi-access decoded data received from the multi-access decoding means and transmitting the channel decoded data and the time slot information; And Data restoring means for restoring original data based on the channel decoded data and the time slot information received from the channel decoding means. Time-based decoding device for data transmission comprising a. In the time-based encoding and decoding method for data transmission applied to a wireless communication system, According to a data transmission request from a user, the data to be transmitted is actually divided into data to be transmitted and first time slot information, and the data processed by performing the encryption, encoding, and modulation functions required to transmit data to be actually transmitted is processed to the first time. Transmitting to a designated time slot according to the slot information; And Combining the signal transmitted in the first step with the information of the second time slot when the signal arrives and performing the decryption, decryption, and demodulation functions in the reverse order to the processing of the encryption, encoding, and modulation functions performed. A second step of restoring original data based on the data and the second time slot information Time-based encoding and decoding method for data transmission comprising a. The method of claim 6, The first step is, In response to a data transmission request from a user, separating the data to be transmitted into data to be actually transmitted and the first time slot information according to a unit data unit; A fourth step of channel encoding the separated actual transmission data; A fifth step of multi-access encoding the channel coded data; A sixth step of modulating the multi-access encoded data; And A seventh step of transmitting the modulated data according to the first time slot information Time-based encoding and decoding method for data transmission comprising a. The method of claim 7, wherein The second step, An eighth step of receiving the signal transmitted through the seventh step and obtaining the second time slot information corresponding to the reception time of the corresponding received signal; A ninth step of demodulating the received signal; A tenth step of multi-access decoding the demodulated data; An eleventh step of channel decoding the multiple access decoded data; And Step 12 of restoring original data based on the channel decoded data and the second time slot information Time-based encoding and decoding method for data transmission comprising a. In the time-based encoding method for data transmission applied to a wireless communication system, A first step of dividing data to be transmitted into data to be actually transmitted and time slot information according to a unit data unit according to a data transmission request from a user; Channel coding the separated actual transmission data; A third step of multi-access coding the channel coded data; Modulating the multi-access coded data; And A fifth step of transmitting the modulated data according to the time slot information Time-based encoding method for data transmission comprising a. The method of claim 9, The fifth step, A sixth step of storing the time slot information value in a time slot information variable and waiting for a synchronization signal from a base station; And When the time slot information variable value is not "0" and the time slot information variable value is not "0", each time corresponding to one time slot length elapses after the synchronization signal, the time slot information variable becomes "0". After the information variable value is decreased by "1", the sixth step is repeated. If the time slot information variable is "0", the modulated data is transmitted in the current time slot and then repeated from the first step. 7th Step Time-based encoding method for data transmission comprising a. A time-based decoding method for data transmission applied to a wireless communication system, A first step of receiving a signal transmitted from the outside and acquiring time slot information corresponding to a reception time of the corresponding received signal; Demodulating the received signal; A third step of multi-access decoding the demodulated data; A fourth step of channel decoding the multi-access decoded data; And A fifth step of restoring original data based on the channel decoded data and the time slot information Time-based decoding method for data transmission comprising a. In a wireless communication system having a processor, According to a data transmission request from a user, the data to be transmitted is actually divided into data to be transmitted and first time slot information, and the data processed by performing the encryption, encoding, and modulation functions required to transmit data to be actually transmitted is processed to the first time. A first function of transmitting to a designated time slot according to the slot information; And Combining the signal transmitted from the first function with the second time slot information when the signal arrives and performing the decryption, decryption, and demodulation functions in the reverse order to the processing of the encryption, encoding, and modulation functions performed. A second function of restoring original data based on data and the second time slot information A computer-readable recording medium having recorded thereon a program for realizing this. In a wireless communication system having a processor, A first function of separating data to be transmitted into data to be actually transmitted and time slot information according to a unit data unit according to a data transmission request from a user; A second function of channel coding the separated actual transmission data; A third function of multi-access coding the channel coded data; A fourth function of modulating the multi-access coded data; And A fifth function of transmitting the modulated data according to the time slot information A computer-readable recording medium having recorded thereon a program for realizing this. In a wireless communication system having a processor, A first function of receiving a signal transmitted from the outside and obtaining time slot information corresponding to a reception time of the corresponding received signal; A second function of demodulating the received signal; A third function of multiple access decoding the demodulated data; A fourth function of channel decoding the multi-access decoded data; And A fifth function of restoring original data based on the channel decoded data and the time slot information A computer-readable recording medium having recorded thereon a program for realizing this.

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