KR20020093464A - Method for controlling data rate use mode and data rate control length - Google Patents

Abstract

The present invention relates to a data rate usage mode and a data rate adjustment length control method, in particular, a 100th step of transmitting an initial usage mode to an access terminal; Step 200 of sending an initial DRCLength to the access terminal; Step 300, the access network receiving the strength of the reverse pilot received signal and the strength of the received signal of the DRC channel and measuring a corresponding BER value; Step 400, the access network determines a control bit after comparing the BER value with a threshold for setting a usage mode and a DRCLength; Transmitting a control bit to an access terminal; Step 600, the access terminal performs a change to a usage mode and DRCLength corresponding to the control bit; Step 700, the access network determines whether an authorization signal has been input; And an 800 step in which the access network completes data transmission when an acknowledgment signal is input. The present invention is an unnecessary resource of a reverse link according to transmission of a DRC channel proceeding only by an initial value regardless of a channel environment. There is an excellent effect that can improve the performance of the HDR system by preventing waste of waste and suppressing the increase of interference.

Description

METHODE FOR CONTROLLING DATA RATE USE MODE AND DATA RATE CONTROL LENGTH}

The present invention relates to a data rate usage mode and a data rate adjustment length control method, and more particularly, to a DRC (DRC) channel in an HDR (High Data Rate) system. The DRC channel usage mode to be used by the access terminal by comparing the strength of the pilot signal received from the access terminal and the BER (Bit Error Rate) performance of the received signal to a threshold when adjusting the forward data rate over the threshold; A data rate usage mode and data rate adjustment length control method that makes it possible to variably adjust DRCLength.

Conventional data rate usage mode and data rate adjustment length control method, the access terminal (Access Terminal) to the DRC channel to the access network (Access Network) to adjust the data rate of the forward link call channel according to the channel environment and user environment In this case, the data rate transmitted by the access terminal through the DRC channel is determined according to the quality of the forward signal received at the access terminal, the access terminal is a DRC information based on the received forward link signal A method of estimating a carrier to interference ratio (C / I) during a forward link period to be used and then changing this value to a data rate value supported by a forward communication channel is used to transmit to an access network.

However, when controlling the data rate usage mode and the data rate adjustment length using the conventional method as described above, the gated mode of the DRC channel has been proposed for reducing the interference of the reverse link and efficient resource usage. As the value is set to non-gated mode and DRCLength is not changed while the call channel is transmitted, there is a problem of unnecessary waste of resources and interference between channels, resulting in a decrease in call quality of the system. .

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to efficiently select and use a control bit for adjusting the DRC channel use mode and DRCLength according to a change in the channel environment, and a reverse link. The present invention provides a data rate usage mode and a data rate adjustment length control method for preventing unnecessary waste of resources and suppressing increase in inter-channel interference.

In order to achieve the above object, the present invention provides a data rate usage mode and a data rate adjustment length control method in an access network and a system having an access terminal.

A step 100 of transmitting, by the access network, an initial usage mode set to an initial value to the access terminal;

A step 200 of setting, by the access network, an initial DRCLength and transmitting the initial DRCLength to the access terminal;

Step 300, the access network receiving the strength of a reverse pilot received signal and a received signal of a DRC channel from the access terminal and simultaneously measuring a corresponding BER value;

Step 400, the access network comparing the measured BER value with a threshold for use mode and DRCLength setting and determining a corresponding control bit;

Step 500, the access network sends the determined control bit to the access terminal;

Step 600, when the access terminal receives a control bit from the access network and performs a change to a usage mode and a DRCLength corresponding to the control bit;

Step 700, the access network determines whether an authorization signal has been input from an access terminal; And

If the approval signal is not input in step 700, the process proceeds to step 300. When the approval signal is input, the access network completes data transmission in step 800.

1 is a functional block diagram showing the configuration of a data rate use mode and a data rate adjustment length control device according to an embodiment of the present invention;

2 is an operation flowchart illustrating a data rate use mode and a data rate adjustment length control method according to an embodiment of the present invention;

3 is an operation flowchart illustrating in more detail the operation of step 400 (S400) of the data rate use mode and the data rate adjustment length control method according to an embodiment of the present invention;

4 is a data rate adjustment (DRC) timing diagram for a non-gated mode used in a data rate usage mode and a data rate adjustment length control method according to an embodiment of the present invention;

5 is a data rate adjustment (DRC) timing diagram for a gated mode used in a data rate usage mode and a data rate adjustment length control method according to an embodiment of the present invention;

6 is a threshold table for setting a usage mode and a data rate adjustment length DRCLength to be used in a data rate usage mode and a data rate adjustment length control method according to an embodiment of the present invention.

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

100: access network 200: access terminal

Hereinafter, a data rate use mode and a data rate adjustment length control method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a functional block diagram of a data rate use mode and a data rate adjustment length control device according to an embodiment of the present invention, and the data rate use mode and data rate adjustment length control device according to an embodiment of the present invention is an access network. (Access Network) 100, and an Access Terminal (200).

The access network 100 transmits an initial usage mode, an initial DRCLength set to an initial value, to the access terminal 200, while the strength of a reverse pilot received signal from the access terminal 200 and a received signal of a DRC channel. After receiving the input and measure the corresponding BER value and compares with the threshold for the use mode and DRCLength setting to determine the control bit and serves to transmit to the access terminal 200.

The access terminal 200 receives an initial usage mode, an initial DRCLength set as an initial value from the access network 100, and then receives the strength of a reverse pilot received signal and a received signal of a DRC channel. In addition to receiving the control bit for changing the use mode and DRCLength from the access network 100, and simultaneously changing the use mode and DRCLength initially set to the use mode and DRCLength corresponding to the control bit. It then serves to transmit the acknowledgment signal to the access network 100.

Next, a data rate use mode and a data rate adjustment length control method according to an embodiment of the present invention using the data rate use mode and the data rate adjustment length control device having the above configuration will be described.

2 is an operation flowchart illustrating a data rate use mode and a data rate adjustment length control method according to an embodiment of the present invention.

First, the access network 100 transmits an initial usage mode set to an initial value to the access terminal 200 (S100).

Subsequently, the access network 100 sets the initial DRCLength and transmits the initial DRCLength to the access terminal 200 (S200).

Then, the access network 100 receives the strength of the reverse pilot received signal and the received signal of the DRC channel from the access terminal 200 and simultaneously measures the corresponding bit error rate (BER) value ( S300).

Subsequently, the access network 100 compares the measured BER value with a threshold for setting a usage mode and a DRCLength and determines a control bit corresponding thereto (S400).

Here, the threshold for setting the usage mode and the DRCLength is shown in the table, the threshold value, DRCLength, usage mode, and control bits as shown in FIG. 6. Bit, the first bit is a value related to the usage mode, and is set to "1" in the gated mode as shown in FIG. 5 and set to "0" in the non-gated mode as shown in FIG. The next two bits indicate DRCLength.

However, in the case of the control bit, the last two bits indicating DRCLength do not necessarily have to match the range of the threshold value, and the position of the acknowledgment channel with respect to the received data transmitted from the access terminal 200 to the access network 100. Considering this, the access network 100 may adjust to use a value below the measured threshold.

In this case, a detailed operation process of the control bit determination in the 400th operation S400 will be described in more detail with reference to FIGS. 3 and 6 as follows.

First, the access network 100 determines whether the measured BER value is greater than or equal to the threshold value TH1 (S401).

Then, when the BER value measured in the step 401 (S401) is greater than or equal to the threshold value TH1, the access network 100 determines the control bit as '111' (S402).

Meanwhile, if the BER value measured in the step 401 (S401) is not greater than or equal to the threshold value TH1, the access network 100 determines that the measured BER value is smaller than the threshold value TH1 and the threshold value TH2. It is determined whether greater than or equal to (S403).

At this time, if the BER value measured in the step 403 (S403) is smaller than the threshold value TH1 and greater than or equal to the threshold value TH2, the access network 100 determines that the control bit is '110' (S404). ).

On the other hand, if the BER value measured in the step 403 (S403) is less than the threshold value TH1 and not greater than or equal to the threshold value TH2, the access network 100 determines that the measured BER value is the threshold value TH2. It is determined whether it is smaller than or equal to and greater than or equal to the threshold value TH3 (S405).

At this time, if the BER value measured in the step 405 (S405) is less than the threshold value TH2 and greater than or equal to the threshold value TH3, the access network 100 determines that the control bit is '101' (S406). ).

On the other hand, if the BER value measured in step 405 is less than the threshold value TH2 and not greater than or equal to the threshold value TH3, the access network 100 determines that the measured BER value is the threshold value TH3. It is determined whether it is smaller than or equal to and greater than or equal to the threshold value TH4 (S407).

At this time, if the BER value measured in the step 407 (S407) is less than the threshold value TH3 and greater than or equal to the threshold value TH4, the access network 100 determines that the control bit is '011' (S408). ).

On the other hand, if the BER value measured in step 407 is less than the threshold value TH3 and not greater than or equal to the threshold value TH4, the access network 100 determines that the measured BER value is the threshold value TH4. It is determined whether it is smaller than or equal to and greater than or equal to the threshold value TH5 (S409).

At this time, if the BER value measured in step 409 (S409) is less than the threshold value TH4 and greater than or equal to the threshold value TH5, the access network 100 determines that the control bit is '010' (S410). ).

On the other hand, if the BER value measured in step 409 (S409) is less than the threshold value TH4 and not greater than or equal to the threshold value TH5, the access network 100 determines that the measured BER value is the threshold value TH5. It is determined whether it is smaller than or equal to and greater than or equal to the threshold value TH6 (S411).

At this time, if the BER value measured in the step 411 (S411) is less than the threshold value TH5 and greater than or equal to the threshold value TH6, the access network 100 determines that the control bit is '001' (S412). ).

On the other hand, if the BER value measured in step 411 is less than the threshold value TH5 and not greater than or equal to the threshold value TH6, the access network 100 sets the measured BER value to the threshold value TH6. At the same time, the control bit is determined to be '000' at the same time (S413).

Subsequently, the access network 100 transmits the determined control bit to the access terminal 200 (S500).

Then, the access terminal 200 receives a control bit from the access network 100 and changes the usage mode and DRCLength corresponding to the specific control bit at step S600.

Here, the access terminal 200 may be transmitted in a non-gated mode or a gated mode as shown in FIG. 5, as shown in FIG. 4, and when used in the gated mode, one access terminal for each DRCLength slot. DRC information is transmitted only in a slot, and DRCLength may be used in four cases of 1, 2, 4, and 8.

Thereafter, the access network 100 determines whether an acknowledge signal is input from the access terminal 200 (S700).

At this time, if the approval signal is not input in step 700 (S700), the process proceeds to step 300 (S300). If the approval signal is input, the access network 100 completes data transmission (S800).

As described above, according to the data rate usage mode and the data rate adjustment length control method according to the present invention, when the forward data rate is adjusted through the DRC channel in the HDR system, the access network receives the strength of the pilot signal received from the access terminal and the received signal. By comparing the BER performance with the threshold, it is possible to variably adjust the DRC channel usage mode and DRCLength to be used by the access terminal, effectively ensuring maximum control bits to adjust the DRC channel usage mode and DRCLength as the channel environment changes. In addition to this, it is possible to prevent unnecessary waste of reverse link caused by DRC channel transmission by initial value regardless of channel environment, and to increase the performance of HDR system by suppressing the increase of interference. have.

Claims (8)

A data rate usage mode and data rate adjustment length control method in an access network and a system having an access terminal, the method comprising: A step 100 of transmitting, by the access network, an initial usage mode set to an initial value to the access terminal; A step 200 of setting, by the access network, an initial DRCLength and transmitting the initial DRCLength to the access terminal; Step 300, the access network receiving the strength of a reverse pilot received signal and a received signal of a DRC channel from the access terminal and simultaneously measuring a corresponding BER value; Step 400, the access network comparing the measured BER value with a threshold for use mode and DRCLength setting and determining a corresponding control bit; Step 500, the access network sends the determined control bit to the access terminal; Step 600, when the access terminal receives a control bit from the access network and performs a change to a usage mode and a DRCLength corresponding to the control bit; Step 700, the access network determines whether an authorization signal has been input from an access terminal; And If the grant signal is not input in step 700, the process proceeds to step 300, and if the grant signal is input, the access network completes data transmission in step 800; Adjustable length control method. The method of claim 1, In step 400, the access network determines whether the measured BER value is greater than or equal to a threshold value TH1; And If the BER value measured in the step 401 is greater than or equal to the threshold value TH1, the access network comprises the step 402 of determining the control bit as '111', characterized in that the data rate use mode and data rate adjustment Length control method. The method of claim 2, If the BER value measured in step 401 is not greater than or equal to the threshold value TH1, the access network determines whether the measured BER value is smaller than the threshold value TH1 and greater than or equal to the threshold value TH2. Step 403; And If the BER value measured in the step 403 is smaller than the threshold value TH1 and greater than or equal to the threshold value TH2, the access network determines that the control bit is '110'. Rate usage mode and data rate adjustment length control method. The method of claim 3, wherein If the BER value measured in the step 403 is less than the threshold value TH1 and not greater than or equal to the threshold value TH2, the BER value measured by the access network is smaller than the threshold value TH2 and greater than the threshold value TH3. A step 405 of determining whether it is greater than or equal to; And If the BER value measured in the step 405 is less than the threshold value TH2 and greater than or equal to the threshold value TH3, the access network determines the control bit as '101'. Rate usage mode and data rate adjustment length control method. The method of claim 4, wherein If the BER value measured in the step 405 is less than the threshold value TH2 and not greater than or equal to the threshold value TH3, the BER value measured by the access network is smaller than the threshold value TH3 and greater than the threshold value TH4. A step 407, determining whether or not it is greater than or equal to; And If the BER value measured in the step 407 is less than the threshold value TH3 and greater than or equal to the threshold value TH4, the access network determines the control bit as '011'. Rate usage mode and data rate adjustment length control method. The method of claim 5, If the BER value measured in step 407 is less than the threshold value TH3 and not greater than or equal to the threshold value TH4, the BER value measured by the access network is smaller than the threshold value TH4 and greater than the threshold value TH5. Step 409, determining whether greater than or equal to; And If the BER value measured in step 409 is less than the threshold value TH4 and greater than or equal to the threshold value TH5, the access network determines step 410 to determine the control bit as '010'. Rate usage mode and data rate adjustment length control method. The method of claim 6, If the BER value measured in step 409 is less than the threshold value TH4 and not greater than or equal to the threshold value TH5, the access network measured BER value is less than the threshold value TH5 and greater than the threshold value TH6. A step 411 of determining whether it is greater than or equal to; And If the BER value measured in the step 411 is smaller than the threshold value TH5 and greater than or equal to the threshold value TH6, the access network determines that the control bit is '001'. Rate usage mode and data rate adjustment length control method. The method of claim 7, wherein If the BER value measured in step 411 is less than the threshold value TH5 and not greater than or equal to the threshold value TH6, the access network determines that the measured BER value is smaller than the threshold value TH6. And a step 413 of determining a corresponding control bit as '000'.