KR20020001173A - Method for transferring data and data information by asynchronous wireless communication system - Google Patents

Abstract

PURPOSE: A method for transferring data and data information in a UTRAN(UMTS Terrestrial Radio Access Network) is provided to transmit a value, generated at a hybrid ARQ(Automatic Repeat reQuest) indicator generator, together when data and data information are transmitted from an RLC(Radio Link Control) layer to a MAC(Media Access Control) layer. CONSTITUTION: If a call is connected, initialization is executed(501). If the call is a call using hybrid ARQ type II/III(502), an ARQ indicator generator is initialized(503). An RLC processor receives data from an upper layer(504). The RLC processor checks whether the type of the received data is traffic data(505). If the type of the data is traffic data, the RLC processor creates an information portion in the data(506). The ARQ indicator generator generates an ARQ indicator value(507). The RLC processor adds the ARQ indicator value to the data and the information portion of the data(508). The data made in the RLC processor are transferred to a user through a lower layer(512).

Description

Data and data information transmission method in asynchronous wireless communication system {METHOD FOR TRANSFERRING DATA AND DATA INFORMATION BY ASYNCHRONOUS WIRELESS COMMUNICATION SYSTEM}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transmitting data and data information in an asynchronous wireless communication system and a computer readable recording medium having recorded thereon a program for realizing the method. In particular, asynchronous mobile communication system (UTRAN: UMTS Terrestrial Radio Access Network) A method and method for delivering data and data information using a hybrid ARQ indicator for hybrid automatic repeat request (ARQ) type II / III scheme in the same asynchronous wireless communication system The present invention relates to a computer-readable recording medium having recorded thereon a program.

1A is an exemplary configuration diagram of a general broadband wireless communication network.

As shown in FIG. 1A, a wireless communication network is organically connected between a mobile station 10, an asynchronous wireless network 20, and a wireless communication core network (eg, a GSM-MAP core network) 30. Here, the hybrid ARQ II / III scheme is a technique applied between the mobile station 10 and the asynchronous wireless network 20, and is used when a request for retransmission is requested from the receiver to the transmitter when there is an error in the received data. Technology.

In this case, the asynchronous wireless network 20 includes an asynchronous radio network controller (RNC) 21 to perform network control, and the wireless communication core network 30 performs an MSC (Mobile Switching Controller) 31. To perform switching control.

1B is an exemplary configuration diagram of a general asynchronous mobile communication system (UTRAN).

The general asynchronous mobile communication system (UTRAN) includes a core network (Core Network) and a radio network (RNS: Radio Network System), the RNS includes an RNC and a NodeB (nodeB).

Here, each symbol shown in the drawings will be described, where Iu is an interface between the core network and the RNC, Iub is an interface between the RNC and nodeB, and Iur is between the RNC. Logical Interface.

In general, asynchronous mobile communication system (UTRAN) checks the data transmitted from the sender to the receiver and, in the case of an error in the received data, requests for retransmission to the sender. Automatic Repeat reQuest), which is divided into three types: Automatic Retransmission Request (ARQ) Types I, II, and III. The technical characteristics of each method are as follows.

In order to facilitate understanding of the present invention, first, an automatic retransmission request (ARQ) scheme will be described in more detail.

Automatic retransmission request (ARQ) is an error control protocol that automatically detects that an error occurred during transmission and receives the block in which the error occurred. That is, one of the error control methods in data transmission is a system that automatically generates a retransmission request signal when an error is detected and retransmits it from a wrong signal.

In the next generation mobile communication system, an ARQ scheme for requesting retransmission of an error-prone packet may be used to transmit packet data.

However, due to the instability of the wireless channel environment, when using this ARQ scheme, the number of retransmission requests may increase, thereby reducing throughput, which is an amount of data that can be sent in unit time. Therefore, ARQ can be used together with Forward Error Correction Coding (FEC) to reduce this problem, and this is called a hybrid ARQ.

Hybrid ARQs include types I, II, and III according to the scheme.

In the case of Type I, one coding rate (e.g., No Coding, Rate 1/2, Rate 1/3, among convolutional coding) depending on the channel environment or required Quality of Service (QoS) If it is determined, it continues to use it, and the receiving end removes the previously received data when the retransmission request is made, and the transmitting end retransmits it at the previously transmitted coding rate. In this case, since the coding rate does not change according to the variable channel environment, the throughput may be reduced compared to Types II and III.

In case of Type II, when the receiver requests data retransmission, it does not remove it, but stores it in a buffer and combines it with the retransmitted data. That is, the first coding rate is transmitted at a high coding rate, and when retransmission is requested, the coding rate is transmitted at a lower coding rate, thereby combining with previously received data. By maximal ratio combining, performance can be significantly improved compared to Type I. For example, if there is a mother code having a convolutional coding rate of 1/4, the punching rate is used to make a coding rate of 8/9, 2/3, 1 A coding rate such as / 4 can be created, which is called a rate compatible punctured convolutional (RCPC) code.

Meanwhile, a code obtained by punching a turbo code is referred to as a rate compatible punctured turbo (RCPT) code. In the first transmission, if the transmission rate is transmitted at a coding rate of 8/9, and the retransmission version is ver (0), an error is detected by checking a Cyclic Redundancy Check (CRC). This data is stored in a buffer and requires retransmission. In this case, when retransmission is performed, the coding rate is transmitted at a coding rate of 2/3, and the version at this time is ver (1). Here, the receiving end combines ver (0) stored in the buffer and ver (1) received, and decodes this value to check the CRC. This process is repeated until no error is found in the CRC test, and the recently transmitted ver (n) is combined with the previously transmitted ver (n-a) (0 <an).

In case of Type III, it is almost the same as Type II. The difference is that before recombining the retransmitted data ver (n) with ver (na), first decode and then check the CRC. Send this value to the upper layer. If an error occurs, it is combined with ver (n-a) and the CRC is checked to determine whether to retransmit.

As such, in the asynchronous W-CDMA system, a hybrid ARQ II / III method is used for efficient data transmission. Hybrid ARQ II / III schemes are initially coded at high rates, and are recoded at low rates when retransmitted and combined at the receiving end for throughput. ). Therefore, in order to combine, the protocol data unit (PDU) sequence number and the number of retransmissions and the version must be known in advance, and this information is low regardless of the retransmission coding rate. The coding rate should be used to ensure quality.

Among the methods of implementing hybrid ARQ Type II / III in asynchronous mobile communication system (UTRAN), data includes physical channel DLSCH and data (data downlink shared channel). ) Information is transmitted to a physical channel decoded physical channel (DPCH).

In this method, if there is data to be sent from the upper layer of the sender, this data is not transformed into the form of transmitted data, but the information (sequence number, version number) is newly created. It is a transmission method. In this case, the data to be sent among the two data data is transmitted through a dedicated traffic channel (DTCH) in the upper layer, PDSCH in the physical channel, and data to be sent (data) ) Information is transmitted to the receiver through a dedicated control channel (DCCH) in the upper layer and a DPCH in a physical channel.

Conventionally, when a physical channel PDSCH is transmitted from a transmitting side to a receiving side, only PD (data) is carried on the PDSCH, and the transport format control indicator (TFCI), which is the control information of the physical channel for the PDSCH, power Transport power control (TPC) and the like for power control are transmitted on the physical channel DPCH associated with the PDSCH. That is, the PDSCH is not transmitted from the transmitting side to the receiving side independently but is transmitted together with the DPCH.

For hybrid ARQ type II / III, the conventional method of sending data to the PDSCH and information on the data to the DPCH associated with the PDSCH has the following problems.

-Data (data) and information parts of data created simultaneously in a radio link control layer (RLC) are simultaneously displayed in a node B (node B: one or more cells). Or a logical node responsible for radio transmission and reception from a UE to a cell.

In the conventional method, data and information of data to be sent are made at the same time in the same RLC, but the node B (nodeB) in the RLC plays a role of transmitting data wirelessly. Since the paths to layer1) and the radio (RF) part are different, the DSCH transport channel (DCH) and the dedicated CHannel (DCH) transport channel (DCH) arriving at NodeB are different. The time is different. In addition, the data part and the information part of the data created in RLC are different depending on the situation of each path while one part of the data arrives at nodeB Data may arrive at NodeB.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the data and the information portion of the data generated in the RLC of an asynchronous wireless network are not included in the medium access control layer (RLC). In the asynchronous wireless communication system that transmits the values generated by the hybrid ARQ indicator generator when transmitted to the MAC), it provides a method of transmitting data and data information and a computer-readable recording medium recording a program for realizing the method. The purpose is.

1A is an exemplary configuration diagram of a general broadband wireless communication network.

1B is an exemplary configuration diagram of a general asynchronous mobile communication system (UTRAN).

Figure 2 is an exemplary view of the interaction between the general asynchronous wireless network and the terminal.

3 is an exemplary configuration diagram of a conventional radio link control layer (RLC) processor.

4 is a diagram illustrating an embodiment of a radio connection control layer (RLC) processor having an ARQ indicator generator for a method of transmitting data and data information according to the present invention.

5 is a flow diagram of an embodiment of a data and data information transmission method in an asynchronous wireless communication system according to the present invention.

* Explanation of symbols for the main parts of the drawings

10: mobile station 20: asynchronous wireless network

30: wireless communication core network 21: asynchronous RNC

31: MSC

In accordance with an aspect of the present invention, a method for transmitting data and data information in an asynchronous wireless communication system includes an Automatic Repeat ReQuest (ARQ) indicator to a Radio Link Control (RLC) processor. A first step comprising an generator; A second step in which the RLC processor receives the traffic transmission data from above and generates an information portion of the transmission data in a situation of using a hybrid ARQ type II / III; Generating, by the ARQ indicator generator, an ARQ indicator value for traffic transmission data processed by the RLC processor; And a fourth step in which the RLC processor includes each of the transmission data and the ARQ indicator value generated in the information of the transmission data, and processes each of them in a transmission form and transmits them through a lower layer.

In addition, another method of the present invention is a method for transferring data and data information in an asynchronous wireless communication system, comprising: an automatic retransmission request (ARQ) indicator generator to a radio connection control layer (RLC) processor of the asynchronous wireless communication system; A first step comprising; Performing a call initialization operation according to the call connection and confirming whether to use a hybrid ARQ type II / III; A third step of initializing the RLC processor if the hybrid ARQ type II / III is not used as a result of the confirmation of the second step, and processing the transmission data received from the upper layer in a transmission form to be transmitted through a lower layer; ; A fourth step of initializing the RLC processor and the ARQ indicator generator and using the hybrid ARQ type II / III as a result of the confirmation of the second step, and determining whether the RLC processor is traffic data for transmission data received from a higher level; A fifth step of generating the information portion of the transmission data and generating an ARQ indicator value and adding the transmission data and the information portion of the transmission data to the lower layer if the traffic data is the determination result of the fourth step; And a sixth step of processing the transmission data in a transmission form by the RLC processor if the traffic data is not the traffic data as a result of the determination in the fourth step.

In addition, the present invention provides a wireless connection control layer (RLC) having an ARQ indicator generator in a situation where a hybrid automatic retransmission request (ARQ) type II / III is used in an asynchronous wireless communication system having a processor. A first function for the processor to receive traffic transmission data at a higher level to generate an information portion of the transmission data; A second function of causing the ARQ indicator generator to generate an ARQ indicator value for traffic transmission data processed by the RLC processor; And a computer-readable recording medium having recorded thereon a program for realizing a third function of processing each in a transmission form and transmitting the data through the lower layer, including the transmission data and the ARQ indicator value generated in the information of the transmission data. .

In addition, the present invention provides a first method for performing a call initialization operation according to a call connection and confirming whether a hybrid automatic retransmission request (ARQ) type II / III is used in an asynchronous wireless communication system having a processor. function; As a result of confirming the first function, if a hybrid ARQ type II / III is not used, a radio connection control layer (RLC) processor included in the asynchronous wireless communication system is initialized and transmitted for transmission data received from a higher level of the RLC processor. A second function for processing through a lower layer to transfer the information through a lower layer; As a result of confirming the first function, when the hybrid ARQ type II / III is used, the RLC processor and the ARQ indicator generator provided by the RLC processor are initialized, and the traffic data is transmitted with respect to the transmission data received by the RLC processor from above. A third function of determining cognition; A fourth function of generating the information portion of the transmission data and generating an ARQ indicator value and adding the transmission data and the information portion of the transmission data to the lower layer if it is the traffic data as a result of the determination of the third function; And a computer-readable recording medium having recorded thereon a program for realizing a fifth function of processing the transmission data in a transmission form and transmitting the data through a lower layer if the third data is not traffic data. to provide.

According to the present invention, a hybrid ARQ indicator generator is installed in an RLC of an asynchronous mobile communication system, and when the data and the information portion of the data generated in the RLC are transmitted from the RLC to the MAC, the hybrid ARQ The present invention relates to a method of sending a value generated by an indicator generator, and may be used as a technology supporting hybrid ARQ type II / III in an asynchronous mobile communication system.

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 describing an embodiment of the present invention, a comprehensive description with reference to the drawings is as follows.

The present invention is a technique applied to an asynchronous wireless network such as (FIG. 2) in an asynchronous mobile communication system (FIG. 1A). In an asynchronous wireless network, a hybrid ARQ indicator generator as shown in FIG. 4 is added to an existing RLC internal structure as shown in FIG. 3. 2 is a figure shown in 3GPP specification 25.322 v3.2.0.

The operation of the RLC having the hybrid ARQ indicator as shown in FIG. 4 is the same as the flowchart of FIG. 5.

This will be described sequentially according to the drawings.

2 is a view illustrating an interaction between a general asynchronous wireless network and a terminal.

In asynchronous radio network (UTRAN) and a user terminal (UERAN), a radio resource control layer (RRC) layer, a radio connection control layer (RLC), a medium access control (MAC), an el 1 (L1) layer Processing is done, and in some cases they are correlated.

3 is an exemplary configuration diagram of a conventional RLC processor, and FIG. 4 is a RLC indicator having an ARQ indicator generator for data and data information transmission method according to the present invention. One embodiment configuration diagram of a processor.

An ARQ indicator generator as shown in FIG. 4 is added to the conventional RLC processor as shown in FIG. 3 to add an ARQ indicator value to the RLC header under the control of an RLC control unit.

5 is a flowchart illustrating a method of transmitting data and data information in an asynchronous wireless communication system according to the present invention.

First, when a call is connected in an asynchronous wireless communication system, an initialization operation is performed (501).

It is determined whether the call to be connected is a call using hybrid ARQ type II / III (502).

As a result of the determination, when the hybrid ARQ type II / III is used, the ARQ indicator generator is initialized in the RLC initialization process (503).

In operation 504, the RLC processor receives transmission data from a higher level.

It is checked whether the type of the received data is traffic data (voice data, packet data, etc.) (505).

As a result of the check, if the type of data is traffic data, the RLC processor generates an information portion of the transmission data (506). In operation 507, an ARQ indicator value is generated by an ARQ indicator generator of the RLC processor.

The RLC processor processes each of the transmission data and the information portion of the transmission data in a transmission form, and adds an ARQ indicator value to the transmission form in step 508. As such, data generated by the RLC processor is transmitted to the user through a lower layer (512).

As a result of checking whether the type of received data is traffic data (voice data, packet data, etc.), if the type of data is not traffic data, that is, data Is a control data transmitted from a transmitting side to a receiving side, the RLC processor processes the transmission data in a transmission form (511), and the data generated by the RLC processor is stored in a lower layer ( It is delivered to the user through a layer (512).

Then, it is checked whether the call is completed (513).

If the completion of the call (Call) is confirmed, if not completed, the RLC processor repeats the process of receiving the transmission data (data) from the upper level, and if the call (call) is completed, the call (call) is terminated.

As a result of determining whether the call to be connected is a hybrid ARQ type II / III call, if the hybrid ARQ type II / III is not used, the initialization of the RLC processor is performed. 509.

The RLC processor receives the transmission data (data) from the upper layer (510) and processes the transmission data (data) in the form of transmission in the RLC processor (511).

Data generated in the RLC layer is transmitted to the user through a lower layer (512).

When the completion of the call (Call) is confirmed (513), if it is not completed, the RLC processor repeatedly performs the process of receiving the transmission data (data) from the upper stage 510, and if the call is completed, the call (call) is completed. Release it.

Of course, in Figure 5 shown as an embodiment of the invention the process of the RLC processor in the processing procedure using the hybrid ARQ type II / III in the case of not completing the call to receive the transmission data (data) from the top (504 Although it is shown to repeat from), this refers to the case of using a hybrid ARQ type II / III, when not used, as described above the processing procedure does not use hybrid ARQ type II / III The RLC processor in the process repeats the process of receiving the transmission data (data) at the upper stage (510).

When the hybrid ARQ indicator generator uses a hybrid ARQ type II / III, the initialization is performed during the call initialization process, and the value from the generator is 1 byte (8 bits, 0 ~). 255) can be expressed in size.

When using the hybrid ARQ type II / III, the ARQ indicator value is added in the operation 508 of adding the ARQ indicator value to the transmission type in the RLC processor. An embodiment of the method may include the following.

In case of using hybrid ARQ type II / III and not using hybrid ARQ type II / III, the data from RLC to MAC is "MAC-DATA." "Request" is a primitive, and the existing primitive types are described in Chapter 8 of the 3GPP specification 25.321 v3.3.0. Therefore, the hybrid ARQ indicator is added to the existing &quot; MAC-DATA-Request &quot; primitive from the RLC to the MAC.

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

As described above, the present invention provides a hybrid ARQ type having better error correction capability than the hybrid ARQ type I by using an ARQ indicator to reliably transmit data and data information. ) II / III can be easily used in asynchronous mobile communication system (UTRAN).

In addition, the hybrid ARQ type (typ) e II / III method can be easily used without changing the hardware (Hardware).

Claims (7)

In the method of transmitting data and data information in an asynchronous wireless communication system, A first step of providing a Radio Link Control (RLC) processor with an Automatic Repeat reQuest (ARQ) indicator generator; A second step in which the RLC processor receives the traffic transmission data from above and generates an information portion of the transmission data in a situation of using a hybrid ARQ type II / III; Generating, by the ARQ indicator generator, an ARQ indicator value for traffic transmission data processed by the RLC processor; And A fourth step in which the RLC processor includes each of the transmission data and the ARQ indicator value generated in the information of the transmission data in the form of transmission and transmits it through a lower layer; Data and data information transmission method in an asynchronous wireless communication system comprising a. The method of claim 1, The second step, A fifth step of performing a call initialization operation according to a call connection in the asynchronous wireless communication system; Initiating the RLC processor and the ARQ indicator processor in a call connection using Hybrid ARQ Type II / III; And A seventh step in which the RLC processor receives the data transmitted from the upper layer to determine whether the data is in the form of traffic data and generates an information portion of the transmitted data in the RLC processor; Data and data information transmission method in an asynchronous wireless communication system comprising a. The method according to claim 1 or 2, An eighth step of receiving the transmission data other than the traffic data from the upper layer, processing the received transmission data in a transmission form and delivering the received data to the user through a lower layer; Data and data information transmission method in the asynchronous wireless communication system further comprising. In the method of transmitting data and data information in an asynchronous wireless communication system, A first step comprising an automatic retransmission request (ARQ) indicator generator in a radio connection control layer (RLC) processor of said asynchronous wireless communication system; Performing a call initialization operation according to the call connection and confirming whether to use hybrid ARQ type II / III; A third step of initializing the RLC processor if the hybrid ARQ type II / III is not used as a result of the confirmation of the second step, and processing the transmission data received from the upper layer in a transmission form to be transmitted through a lower layer; ; A fourth step of initializing the RLC processor and the ARQ indicator generator and using the hybrid ARQ type II / III as a result of the confirmation of the second step, and determining whether the RLC processor is traffic data for transmission data received from a higher level; A fifth step of generating the information portion of the transmission data and generating an ARQ indicator value and adding the transmission data and the information portion of the transmission data to the lower layer if the traffic data is the determination result of the fourth step; And As a result of the determination in the fourth step, if the traffic data is not the sixth step, the RLC processor processes the transmission data in a transmission form and delivers the data through a lower layer. Data and data information transmission method in an asynchronous wireless communication system comprising a. The method of claim 4, wherein The fifth step, A seventh step in which the RLC processor generates an information portion of the transmission data if the transmission data received by the RLC processor from the upper layer processor is traffic data; An eighth step of the ARQ indicator generator generating an ARQ indicator value according to control of the RLC processor; A ninth step of processing the transmission data and the information portion of the transmission data in a transmission form by the RLC processor, and adding the ARQ indicator values generated by the ARQ indicator generator to process the transmission form; And A tenth step of transmitting the transmitted data processed by the RLC processor to the user through a lower layer; Data and data information transmission method in an asynchronous wireless communication system comprising a. In an asynchronous wireless communication system having a processor, In a situation where hybrid automatic retransmission request (ARQ) type II / III is used, a radio connection control layer (RLC) processor having an ARQ indicator generator receives the traffic transmission data from the upper part to send the information portion of the transmission data. A first function of generating; A second function of causing the ARQ indicator generator to generate an ARQ indicator value for traffic transmission data processed by the RLC processor; And A third function of processing each of the transmission data and the ARQ indicator value generated in the information of the transmission data in a transmission form and transmitting the information through the lower layer; A computer-readable recording medium having recorded thereon a program for realizing this. In an asynchronous wireless communication system having a processor, A first function of performing a call initialization operation according to the call connection and confirming whether to use a hybrid automatic retransmission request (ARQ) type II / III; As a result of confirming the first function, if a hybrid ARQ type II / III is not used, a radio connection control layer (RLC) processor included in the asynchronous wireless communication system is initialized and transmitted for transmission data received from a higher level of the RLC processor. A second function for processing through a lower layer to transfer the information through a lower layer; As a result of confirming the first function, when the hybrid ARQ type II / III is used, the RLC processor and the ARQ indicator generator provided by the RLC processor are initialized, and the traffic data is transmitted with respect to the transmission data received by the RLC processor from above. A third function of determining cognition; A fourth function of generating the information portion of the transmission data and generating an ARQ indicator value and adding the transmission data and the information portion of the transmission data to the lower layer if it is the traffic data as a result of the determination of the third function; And A fifth function of processing the transmission data in a transmission form by the RLC processor if it is not the traffic data as a result of the determination of the third function and transmitting the same through a lower layer A computer-readable recording medium having recorded thereon a program for realizing this.