KR101234247B1 - Apparatus and method for transmission in broadband wireless communication system - Google Patents

Abstract

The present invention receives information data, receives an available signal (ACK) from each encoder chain, and divides the information data received by the encoder chain that transmitted the available signal (ACK) into information data of a predetermined size. A distributor for transmitting an encoding start signal (kick) upon completion of transmission, and if the information data is in an available state that can process the information data, transmitting the available signal (ACK) to the distributor, and having a predetermined size from the distributor. Receiving the information data and the encoding start signal (kick), the encoder chain for encoding, interleaving the received information data and outputting to a combiner, the combiner for combining an output signal of the encoder chains to provide a modulator, and A clown including a modulator for modulating and outputting data received from the combiner in a corresponding modulation scheme It relates to a transmission apparatus and method in a wireless communication system.

Broadband Wireless Communication System, Encoder, Encoder Chain, Interleaver

Description

Transmission apparatus and method of broadband wireless communication system {APPARATUS AND METHOD FOR TRANSMISSION IN BROADBAND WIRELESS COMMUNICATION SYSTEM}

1 is a diagram showing a transmitting device of a broadband wireless communication system;

2 is a diagram illustrating a configuration of a transmission apparatus of a broadband wireless communication system constructed according to an embodiment of the present invention;

3 is a diagram illustrating a configuration of an encoder chain in a transmitting apparatus of a broadband wireless communication system constructed according to an embodiment of the present invention;

4 is a flowchart illustrating a transmission flow of a transmitting apparatus of a broadband wireless communication system constructed according to an embodiment of the present invention;

5 is a flowchart illustrating a flow of an encoder chain in a transmitting apparatus of a broadband wireless communication system constructed according to an embodiment of the present invention.

The present invention relates to a transmission apparatus and method for a broadband wireless communication system including a plurality of encoder chains for encoding and interleaving information data having a predetermined size.

In general, in the 4th Generation communication system, which is the next generation communication system, active research is being conducted to provide users with services having various Quality of Service (QoS) having a transmission rate of about 100 Mbps. Currently, the 3rd Generation communication system generally supports a transmission rate of about 384 Kbps in the outdoor having a relatively poor channel environment, and a maximum transmission rate of about 2 Mbps in a room having a relatively good channel environment.

Meanwhile, wireless local area network (LAN) systems and wireless metropolitan area network (MAN) systems generally support transmission rates of 20 Mbps to 50 Mbps. The wireless MAN system is suitable for supporting high-speed communication service because its coverage is wide and supports high transmission speed, but it does not consider mobility of a subscriber station at all. Therefore, in the 4th generation communication system, research is being actively conducted in the form of ensuring mobility and QoS in a wireless LAN system and a wireless MAN system that guarantee a relatively high transmission speed.

The orthogonal frequency division multiple access (OFDM) scheme and the orthogonal frequency division multiple access (OFDMA) scheme are applied to the physical channel of the wireless MAN system. Electronics Engineers) 802.16 system. In other words, the IEEE 802.16 system realizes high-speed data transmission by transmitting a physical channel signal using a plurality of subcarriers.

Next, a structure of a transmission apparatus of a broadband wireless communication system proposed by IEEE 802.16d / e will be described with reference to FIG. 1 below.

1 is a diagram illustrating an apparatus for transmitting a broadband wireless communication system.

Referring to FIG. 1, a transmission apparatus of a broadband wireless communication system includes an encoder 100, an interleaver 102, an iterator 104, and a modulator 106.

The transmission path of the transmitting apparatus of the broadband wireless communication system (Encoder) (100) and outputs the channel coding (Channel coding) at the corresponding code rate in order to make the (information bits) input to the wireless channel (Robust) . The interleaver 102 strongly interleaves and outputs the encoded data from the encoder 100 to a burst error, and the iterator 104 temporarily stores data received from the interleaver 102 and outputs the data from the modulator 106. The modulator 106 outputs the modulator 106 in units of a predetermined size. The modulator 106 modulates the data received from the repeater 104 by the modulation method and outputs the modulated data.

A transmission apparatus of a general broadband wireless communication system is configured by connecting the encoder 100, the interleaver 102, the repeater 104, and the modulator 106 in series as shown in FIG.

However, due to the characteristics of the broadband wireless communication system, a transmission rate of 100 Mbps is required, but it is difficult to support a required transmission rate due to the limitation of each device with the configuration as shown in FIG.

In addition, channel coding information data input from the encoder 100 at a corresponding code rate means that the information data, which is input data, grows at a constant rate in the process of encoding the information data, which is output data, to encoded data, and thus is relatively processed. Due to the difference in the processing speeds of the interleaver 102 and the encoder 100 with a large amount of data to be executed, the encoder 100 has a problem of waiting for the interleaver 102 to finish the previous work.

Therefore, there is a need for an apparatus and method capable of transmitting at a high transmission rate required by a transmission apparatus of a broadband wireless communication system.

An object of the present invention is to provide an apparatus and method for transmitting a broadband wireless communication system having one or more encoder chains.

Another object of the present invention is to provide an apparatus and method for transmitting a broadband wireless communication system having an encoder chain having two encoder memories.

Another object of the present invention is to provide a transmission apparatus and method for a broadband wireless communication system including a plurality of encoder chains for encoding and interleaving information data having a predetermined size.

An apparatus of the present invention for achieving the above objects, in a transmission apparatus of a broadband wireless communication system, receives information data, receives an available signal (ACK) from each encoder chain, and receives the available signal (ACK) A splitter which transmits the information data received by the encoder chain transmitted into information data having a predetermined size, and transmits an encoding start signal (kick) when the transmission is completed; The encoder for transmitting the available signal (ACK) to the splitter, and encoding and interleaving the received information data to the combiner when receiving the information data and the encoding start signal kick having a predetermined size from the splitter. A combiner for coupling an output signal of a chain and the encoder chains to a modulator, and the combiner The present invention provides a device including a modulator for modulating and outputting data received from a corresponding modulation scheme.

In accordance with another aspect of the present invention, there is provided a method of transmitting a wideband wireless communication system, in which an information data is received and divided into information data having a predetermined size, and the available encoder chain transmits an available signal (ACK). Distributing and transmitting; transmitting an encoding start signal to the encoder chain that has transmitted the predetermined information data; and receiving each encoding chain that has received the predetermined size of information data and the encoding start signal. And encoding the information data and outputting the interleaved encoded data, combining the encoded data output from the respective encoder chains, and modulating and outputting the combined encoded data.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The present invention relates to a transmission apparatus and method for a broadband wireless communication system having a plurality of encoder chains and supporting a high data rate, which will be described below with reference to FIGS. 2 to 5.

2 is a diagram illustrating a configuration of a transmission apparatus of a broadband wireless communication system constructed according to an embodiment of the present invention.

Referring to FIG. 2, the transmitter of the present invention includes a divider 200, encoder chains 210, 212, and 214, a combiner 220, and a modulator 230.

The divider 200 receives the information data, receives the available signal ACK from each of the encoder chains 210, 212, 214, and receives it with the encoder chains 210, 212, 214 that transmit the available signal ACK. The information data is divided into information data having a predetermined size and transmitted. When the transmission is completed, an encoding start signal (kick) is transmitted.

When the encoder chains 210, 212, and 214 are available states capable of processing information data, the encoder chains 210, 212, and 214 transmit an available signal ACK to the distributor 200 and, from the distributor 200, the information data having a predetermined size and the encoding start signal ( When the kick) is received, the received information data is encoded, interleaved, and output to the combiner 220. The number of the encoder chains 210, 212, and 214 increases in proportion to the size of the transmission rate required by the transmitting apparatus, and the number of the encoder chains 210, 212, and 214 can be changed according to the transmission rate. An internal configuration of the encoder chains 210, 212, and 214 will be described later with reference to FIG.

The combiner 220 combines the output signals of the respective encoder chains 210, 212, and 214 and provides them to the modulator 230.

The modulator 230 modulates the data received from the combiner 220 in a corresponding modulation scheme and outputs the modulated data.

3 is a diagram illustrating a configuration of an encoder chain in a transmission apparatus of a broadband wireless communication system constructed according to an embodiment of the present invention.

Referring to FIG. 3, the encoder chains 210, 212, and 214 may include an input memory 300, an encoder 302, an encoder divider 304, an encoder memory 306, 308, an available signal generator 310, The encoder combiner 312, the interleaver 314, and the repeater 316 are configured.

The input memory 300 is a memory that receives and temporarily stores information data having a predetermined size from the distributor 200.

When the encoder 302 receives the encoding start signal kick from the divider 200, the encoder 302 receives the information data stored in the input memory 300, channel-codes the corresponding code rate, and outputs the channel code to the encoder divider 304. Then, the presence or absence of the operation of the encoder 302 is transmitted to the available signal generator 310.

The encoder divider 304 divides the encoded data received from the encoder 302 into a predetermined size and stores the encoded data in the empty encoder memories 306 and 308.

The encoder memories 306 and 308 receive and temporarily store encoded data having a predetermined size from the encoder divider 304 and transmit the encoded data to the encoder combiner. The available signal generator 310 determines whether the encoder memories 306 and 308 can be used. To send).

The reason why the encoder memories 306 and 308 are composed of two memories is that the output signal generated by the channel encoding of the encoder 302 is relatively large compared to the input signal, so that the size of the encoded data that can be processed by the interleaver 312 is increased. Exceed. Therefore, when two encoder memories 306 and 308 are operated between the encoder 302 and the interleaver 312 to store the encoded data to be interleaved next in the memory, the interleaver 312 interleaves the current encoded data. Thereafter, interleaving of the next encoded data can be immediately started without waiting for memory storage completion of the encoded data to be interleaved next. Therefore, the time taken to store encoded data between the encoder 302 and the interleaver 312 is not wasted.

The available signal generator 310 receives the presence or absence of the operation of the encoder 302 and whether the encoder memories 306 and 308 are available, and thus there is a memory available among the encoder memories 306 and 308, and the encoder 302 If not, an available signal (ACK) is transmitted to the distributor (200).

The encoder combiner 312 provides the encoded data stored in the encoder memories 306 and 308 to the interleaver 314 in the order in which they are stored.

The interleaver 314 strongly interleaves the encoded data received from the encoder combiner 312 to a burst error and outputs it to the iterator 316.

The repeater 316 temporarily stores the data received from the interleaver 314 and outputs the data to the combiner 220 in units of a predetermined size.

Hereinafter, a transmission method of a broadband wireless communication system according to the present invention configured as described above will be described with reference to FIGS. 4 to 5.

4 is a flowchart illustrating a transmission flow of a transmitting device of a broadband wireless communication system constructed according to an embodiment of the present invention.

In step 400, the transmitting apparatus checks whether there is information data to be transmitted, and if there is information data to be transmitted as a result of the check in step 400, the transmitter proceeds to step 402 to divide the information data into a predetermined size and to use an available signal ( ACK) is distributed to the available encoder chains to transmit, and an encoding start signal kick is transmitted to the distributed encoder chains.

Each encoder chain receiving the information data and the encoding start signal encodes and interleaves the information data distributed in step 404. The flow of the encoder chain in step 404 will be described later in detail with reference to FIG. 5.

When the coder chain interleaves and outputs the encoding, the process proceeds to step 406 to combine the output signals of the respective encoder chains, and the process proceeds to step 408 to modulate and output the combined coded data in a corresponding modulation scheme.

5 is a flowchart illustrating a flow of an encoder chain in a transmitting apparatus of a broadband wireless communication system constructed according to an embodiment of the present invention.

Each encoder chain of the present invention proceeds to step 500 to check the encoder memory and encoder of the encoder chain to check whether or not the processing of information data is possible.

If the check result information data of step 500 can be processed, that is, if there is a memory available in the encoder memory and the encoder is not in operation, the process proceeds to step 502 and generates an available signal ACK and transmits it to the distributor.

In step 502, the available signal ACK is transmitted, and in step 504, when receiving the information data, in step 506, the information data is stored in the input memory which is a temporary storage location.

In step 506, if the information data is stored in the input memory, the process proceeds to step 508 to check whether an encoding start signal is received. If the test result of step 508 receives an encoding start signal, it proceeds to step 510. Channel coding the information data stored in the input memory at a corresponding code rate, proceed to step 512 to divide the coded data and store it in an empty encoder memory among a plurality of encoder memories, and proceed to step 514 Interleaving is performed in the order stored in the memory. In step 516, the interleaved data is output in units of a predetermined size.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described. However, various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention relates to a transmission apparatus and method for a broadband wireless communication system including a plurality of encoder chains for encoding and interleaving information data having a predetermined size, and the transmission rate required by the transmission device of the broadband wireless communication system. The number of encoder chains is adjusted accordingly to provide the required transmission rate.

Claims (10)

In the transmitting device of a broadband wireless communication system, A distributor for receiving information data and dividing the received information data into data having a predetermined size in response to an available signal (ACK); Multiple encoder chains; A combiner for coupling the output signals of the encoder chains; And And a modulator for modulating and outputting data output from the combiner in a corresponding modulation scheme. Each of the encoder chains, When the encoding process is possible, the available signal ACK is generated and transmitted to the distributor. And encoding and outputting the information data divided by the distributor to the combiner. The method of claim 1, The encoder chains, And at least one encoder chain determined by the data rate. The method of claim 1, wherein each of the encoder chains, An input memory for receiving and storing the divided data; An encoder for channel coding the data stored in the input memory at a corresponding code rate; An encoder divider for dividing the encoded data channel coded by the encoder into a predetermined size; Encoder memories each receiving and storing encoded data divided by the encoder distributor; An encoder combiner for combining encoded data stored in the encoder memories;  An interleaver for interleaving the output of the encoder combiner; And And a repeater for temporarily storing the output of the interleaver and outputting the interleaver to the combiner in units of a predetermined size. The method of claim 3, An available signal for generating the available signal ACK when there is a usable memory among the encoder memories and the encoder is not in operation by receiving information on whether the encoder operates and whether the encoder memories are available. Apparatus further comprises a generator. The method of claim 3, And said encoder memories comprise two memories. In the transmission method of a broadband wireless communication system, Generating an available signal (ACK) when a coding process is possible in a plurality of encoder chains; In response to the available signal (ACK), dividing the received information data into data having a predetermined size; Encoding the divided data by each of the encoder chains; Combining data encoded by the encoding chains; And And modulating and outputting the combined coded data. The method of claim 6, wherein the encoding of the divided data by each of the encoder chains comprises: And encoding the divided data by at least one encoder chain determined according to a transmission rate. The method of claim 6, wherein the encoding of the divided data by each of the encoder chains comprises: Storing the divided data in an input memory; Channel coding the data stored in the input memory by a coder at a corresponding code rate; Dividing the channel coded encoded data into a predetermined size; Storing the divided encoded data in each of the encoder memories; Combining encoded data stored in the encoder memories;  Interleaving the combined encoded data; And And temporarily storing the interleaved data and outputting the interleaved data for the combining in a predetermined size unit. The method of claim 8, wherein the available signal (ACK), Generated when there is an available memory among the encoder memories and the encoder is not running. The method of claim 8, wherein the storing of the divided coded data in each of the encoder memories comprises: And storing the split coded data in each of two encoder memories.

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