KR20010100237A - Apparatus and Method for transmitting common packet channel - Google Patents

Abstract

The present invention relates to next generation mobile communication, and more particularly, to an apparatus and method for transmitting a common packet channel using multiple codes. The apparatus for transmitting a common packet channel according to the present invention includes a first channelization unit for receiving a predetermined number of data portions as I channels among the data portions to be transmitted, and channelizing each of them, and the remaining data portions and control portions of the data portions. A second channelizer configured to receive a Q channel as a channel, a first adder configured to add data parts channelized by the first channelizer, and a data part and a control part channelized by the second channelizer, respectively. A second adder for adding the imaginary converter, a imaginary converter for converting the data output from the second adder into a complex form, an adder for adding the data output from the imaginary converter and the data output from the first adder, and the adder The maximum data layout by consisting of a multiplier that scrambles the data output from That it is possible to transfer data even 960kbps or more has an effect that can be transferred at high speed a large amount of packet data at a time.

Description

Apparatus and Method for transmitting common packet channel

The present invention relates to next generation mobile communication, and more particularly, to an apparatus and method for transmitting a common packet channel using multiple codes.

1 is a block diagram illustrating a conventional apparatus for transmitting a common packet channel.

Referring to FIG. 1, a conventional apparatus for transmitting a common packet channel includes a first multiplier 100 for multiplying a data portion by a channelization code and a second multiplier for channelizing a control portion by a channelization code. In the multiplier 101, the imaginary transformer 102 for complexing the control portion channeled in the second multiplier 101, the data portion channelized in the first multiplier 100 and the imaginary transformer 102 The adder 103 adds a complexed control part and a third multiplier 104 multiplying the scrambling code by the data output in the complex form from the adder 103.

The operation of the transmitter of the conventional common packet channel configured as described above is as follows.

A mobile station that wants to transmit packet data first checks the amount of data accumulated in its transmission buffer to determine the maximum data rate of the common packet channel CPCH.

Thereafter, the mobile station attempts to access by transmitting an access preamble to the base station, and accordingly starts transmission of the message when a physical common packet channel capable of transmitting at the maximum data rate is allocated from the base station.

At this time, the data part of the message is input to the I channel of the transmitting device and multiplied by the data part channelization code C _d in the first multiplier 100, and the control part is controlled to the Q channel. It is input and multiplied by the control partial channelization code C _c in the second multiplier 101 to channelize it.

Here, as shown in FIG. 2, the code of the node C (256, 0) in the orthogonal variable spreading rate code tree (OVSF code tree) is used as the control partial channelization code C _c regardless of the data rate to be transmitted. As the channelization code C _d , the code of the C (diffusion rate, spread rate / 4) node of the orthogonal variable spreading rate code tree is used according to the data rate to be transmitted.

In this case, since the spreading rate SF of the common packet channel CPCH is 4 to 256, the data partial channelization code C _d may be C (4, 1), C (8, 2), ..., The code of any one of C (256, 64) is used.

After the channelization process as described above, the control part is complexed by the imaginary converter 102, and the adder 103 adds the complexed control part and the channelized data part in a complex form.

The complex data is multiplied by the scrambling code S _{c-msg, n} in the third multiplier 104 to be scrambled, and thus generated as packet data and transmitted to the base station.

Here, since the scrambling code S _{c-msg, n} is uniquely determined for each physical common packet channel, the mobile station uses a different scrambling code according to the allocated physical common packet channel.

Considering the conventional apparatus for transmitting a common packet channel described above, the conventional common packet channel is transmitted using only a single code.

That is, the scrambling code (S _{c-msg, n} ) uses a unique code for each physical common packet channel, and the channelization codes (ie, C _c and C _d ) are C (2, Based on the node, the code of the node C (256, 0) is the control partial channelization code (C _c ), and the C (diffusion rate, spread rate / 4) is the data partial channelization code (C _d ). The code of the node's code is used.

However, the data rate of packet data that can be supported in the conventional common packet channel (CPCH) is 960, 480, 240, 120, 60, 30, 15 Kbps, the spreading rate (SF) used at this time is 4, 8, Considering 16, 32, 64, 128, and 256, there is a problem in that data cannot be transmitted when the amount of data to be transmitted by the mobile station is larger than 960 kbps.

Here, a method of dividing more than 960kbps data into two or more times may be considered, but this also causes a problem of increasing data transmission time and decreasing operation yield of the mobile station and the base station.

Accordingly, an object of the present invention is to provide a device and method for transmitting a common packet channel, which is designed in view of the above-described problems of the related art and can increase the amount of transmission data using multi-code.

According to an aspect of the present invention for achieving the above object, the transmission apparatus of the common packet channel is a first channelization unit for receiving a predetermined number of data portions of the data portion to be transmitted to the I channel and channelized, respectively; A second channelizer configured to receive the remaining data portion and the control portion of the data portion through a Q channel and channelize each of the data portions; a first adder configured to add data portions channeled by the first channelizer, respectively; and the second channelizer. A second adder for adding a channelized data portion and a control portion, respectively, a imaginary converter for converting the data output from the second adder into a complex form, the data output from the imaginary converter and the first adder An adder for adding the output data, and a multiplication for scrambling by multiplying the data output by the adder with a scrambling code It is composed of groups.

Preferably, a first multiplier for multiplying the channelization code of a specific node by a first data portion of the input data portion and the channelization code of a specific node to a third data portion of the input data portion; A second multiplier for multiplying a code and a third multiplier for multiplying a fifth data portion of the input data portion with a channelization code of a specific node, wherein the second channelization portion is a second data portion of the input data portion; A fourth multiplier for multiplying by a channelization code of a specific node, a fifth multiplier for multiplying a channelization code of a specific node by a fourth data portion of the input data portion, and specifying a sixth data portion among the input data portions A sixth multiplier for multiplying the channelization code of the node, and a seventh multiplier for multiplying the input control portion with the channelization code of the specific node; It consists of a multiplier.

According to another aspect of the present invention for achieving the above object, the transmission method of the common packet channel is to check the maximum data rate to be transmitted, and to transmit when the maximum data rate exceeds a specific value Receiving a predetermined number of data portions of the data portion through the I channel and multiplying them by a specific channelization code, and receiving the remaining data portions and the control portion through the Q channel and multiplying the specific channelization codes by a channel, respectively; And adding the channelized data portion and the control portion in a complex form, and multiplying the complexed data by a scrambling code.

Advantageously, channelization codes for the data portion entered through the I channel or through the Q channel include C (4, 1), C (4, 3) and C (4) of the orthogonal variable spreading rate code tree. 2) Select and use any one of the codes of the node, and select the code of the C (256, 0) node of the orthogonal variable spreading rate code tree as the channelization code for the control portion input through the Q channel. Use it.

The data portion input through the I channel may be any one of a first data portion, a third data portion, and a fifth data portion among the data portions to be transmitted, and the data portion input through the Q channel is to be transmitted. The data portion is any one of the second data portion, the fourth data portion, and the sixth data portion.

1 is a block diagram illustrating a conventional apparatus for transmitting a common packet channel.

2 illustrates an orthogonal variable spreading rate code tree for assigning a channelization code of a conventional common packet channel.

3 is a block diagram illustrating an apparatus for transmitting a common packet channel according to the present invention.

4 illustrates an orthogonal variable spreading rate code tree for assigning a channelization code of a common packet channel according to the present invention.

* Description of the symbols for the main parts of the drawings *

300, 310: channelization unit 320, 330: summer

340: Imaginary Converter 350: Adder

360: multiplier

Hereinafter, a configuration and an operation according to an exemplary embodiment of the present invention will be described with reference to the accompanying drawings.

The present invention proposes an apparatus and method for transmitting a common packet channel that can increase the amount of packet data transmitted by a mobile station through a common packet channel using multi-code.

To this end, the present invention transmits packet data using a single code when the amount of data to be transmitted is 960kbps or less, and uses multicode when the amount of data to be transmitted is 960kbps or more. send.

That is, since the message part of the physical common packet channel is composed of a data part and a control part, when the amount of data to be transmitted is 960 kbps or less, it is spread as a channelization code of the data part. Depending on the SF, different C (diffusion, spread / 4) code is used.

However, when the amount of data to be transmitted exceeds 960 kbps, up to six data portions are transmitted. At this time, each data portion is divided into I and Q channels and channelized by a specific channelization code.

In this case, as a specific channelization code for each data portion divided into an I channel and a Q channel, one of the codes of a node having a spreading factor of 4 among the codes of an orthogonal variable spreading rate code tree is selected. Use it.

Here, as the channelization code for the control part, as in the single code, the code of the C (256, 0) node of the orthogonal variable spreading rate code tree is fixedly used.

3 is a block diagram illustrating an apparatus for transmitting a common packet channel according to the present invention.

Referring to FIG. 3, the apparatus for transmitting a common packet channel according to the present invention includes a first channelization unit 300 which receives a predetermined number of data portions as I channels from among data portions to be transmitted, and channelizes each of the data portions. A second channelizer 310 that receives the remaining data portion and the control portion as a Q channel, and adds the channelized data portions respectively by the first channelizer 300. And a second summer 330 for adding the data portion and the control portion channeled by the second channelizer 310, and an imaginary number for converting the data output from the second summer 330 into a complex form. A scrambling code is added to a transformer 340, an adder 350 that adds data output from the imaginary converter 340 and data output from the first summer 320, and data output from the adder 350. Multiply scram It consists of a multiplier 360 for bling.

Here, the first channelizer 300 may include a first multiplier 301 that multiplies a first data portion of the input data portion by a channelization code of a specific node, and specifies a third data portion among the input data portions. And a second multiplier 302 for multiplying the channelization codes of the nodes, and a third multiplier 303 for multiplying the fifth data portion of the input data portion with the channelization code of the specific node.

The second channelizer 310 may further include a fourth multiplier 311 for multiplying a second data portion by a channelization code of a specific node among the input data portions and a fourth data portion among the input data portions. A fifth multiplier 312 for multiplying a channelization code of a node, a sixth multiplier 313 for multiplying a sixth data portion of the input data portion with a channelization code of a specific node, and a specific node for the input control portion And a seventh multiplier 314 to multiply the channelization code of < RTI ID = 0.0 >

The operation of the transmitter of the common packet channel configured as described above is as follows.

A mobile station that wants to transmit packet data first checks the amount of data accumulated in its transmission buffer to determine the maximum data rate of the common packet channel CPCH.

Thereafter, the mobile station attempts to access by transmitting an access preamble to the base station, and accordingly starts transmission of the message when a physical common packet channel capable of transmitting at the maximum data rate is allocated from the base station.

At this time, when the amount of data to be transmitted is 960kbps or less, one data portion is used for transmission, and at this time, a channelization code according to a desired spreading rate is selected and used from spreading ratios (SF) 4 to 256.

However, when the amount of data to be transmitted is 960kbps or more, up to six data parts are used for transmission, and at this time, a channelization code is used using a multi code.

Table 1 shows the relationship between the maximum data rate and the data part to be used according to the amount of data to be transmitted.

The amount of data you want to send (kbps) Data rate Data part to use 0-15 15 One 15 to 30 30 One 30 to 60 60 One 60 to 120 120 One 120 to 240 240 One 240-480 480 One 480-960 960 One 960-1920 1920 1, 2 1920-2880 2880 1, 2, 3 2880-3840 3840 1, 2, 3, 4 3840-4800 4800 1 2 3 4 5 4800-5760 5760 1, 2, 3, 4, 5, 6

Referring to Table 1, when the maximum data rate exceeds 960 kbps and is less than 1920 kbps, data is transmitted using the first data portion and the second data portion, and when the maximum data rate is more than 4800 kbps and less than 5760 kbps, the first data rate is used. Data is transmitted using the data portion to the sixth data portion.

In all these cases, only one control portion is used, and the channelization code for this control portion is fixedly the code of the C (256, 0) node of the orthogonal variable spreading rate code tree.

Here, in all cases shown in Table 1, the channelization codes for each data portion are shown in Table 2 below.

Physical Common Packet Channel Message channel Channelization Code (Based on Orthogonal Variable Diffusion Code Tree) Control part Q channel C (256, 0) First data part I channel C (4, 1) Second data part Q channel C (4, 1) Third data part I channel C (4, 3) Fourth data part Q channel C (4, 3) Fifth data part I channel C (4, 2) 6th data part Q channel C (4, 2)

Referring to Table 2, since the I channel and the Q channel are orthogonal to each other, the first data portion, the third data portion, and the fifth data portion are input to the I channel, and the second data portion and the fourth data portion. And a sixth data portion is input to the Q channel and then assigned a channelization code for each data portion as shown in FIG. 4.

Referring to FIG. 4, except for the C (4, 0) node connected to the C (256, 0) used for the control portion among the nodes having a spreading rate of 4, the remaining three nodes are channelized codes for each data portion. Used as.

More specifically, as shown in Table 2, the code of the node C (4, 1) is used as the channelization code for the first data portion and the second data portion, and C (for the third data portion and the fourth data portion). 4, 3) The code of the node is used as the channelization code, and the code of the C (4, 2) node is used as the channelization code for the fifth and sixth data parts.

Therefore, as described above, when the maximum data rate exceeds 960 kbps, up to six data parts are variably used, and the channelization code for each data part is used in the orthogonal variable spreading rate code tree. Selecting and using any of the codes of the four nodes can maintain orthogonality between the channels, and can transmit up to six data parts and one control part.

From now on, when the maximum data rate is 960 kbps or more, the operation of the common packet channel transmitter shown in Fig. 3 will be described in detail.

When the mobile station is assigned a physical common packet channel capable of transmitting at the maximum data rate from the base station, the first data portion, the third data portion and the fifth data portion are input to the I channel, the second data portion, the fourth data portion and The sixth data portion is input to the Q channel and channelized respectively.

That is, the first data portion is input to the first multiplier 301 and channelized, the third data portion is input to the second multiplier 302 and channelized, and the fifth data portion is input to the third multiplier 303. The second data portion is inputted and channelized to the fourth multiplier 311, and the fourth data portion is inputted and channelized to the fifth multiplier 312, and the fourth multiplier 313 is inputted to the fourth multiplier 313. 6 The data portion is input and channelized.

At this time, the channelization code for each data portion is C _{d, k} (k = 1 to 6), and as described above, C (4, 1) among nodes having a spreading factor of 4 in the orthogonal variable spreading rate code tree. Use any one of the codes of the C (4, 3) and C (4, 2) nodes.

More specifically, the code of the node C (4, 1) is included in the first data portion and the second data portion, the code of the node C (4, 3) is included in the third data portion and the fourth data portion, and the fifth data. In the part and the sixth data part, the code of the C (4, 2) node is used as the channelization code.

On the other hand, the control part is input to the Q channel, and the control part uses the code of the node C (256, 0) in the orthogonal variable spreading rate code tree as the channelization code C _c . The channelization code C _c of this control portion always uses the code of the C (256, 0) node regardless of the data rate to be transmitted. That is, the control part is input to the seventh multiplier 314 and channelized.

Thereafter, the first summer 320 adds the respective portions of data channelized by the first multiplier 301, the second multiplier 302, and the third multiplier 303, and the second summer 330 adds the first data. The channelized data portion and the control portion are added in the four multiplier 311, the fifth multiplier 312, the sixth multiplier 313, and the seventh multiplier 314.

Subsequently, the imaginary converter 340 converts the data output from the second summer 330 into a complex form, and the adder 350 converts the complex data and the first summer 320 output from the imaginary converter 340. Add the data output from). Eventually, the adder 350 adds six data parts and one control part in a complex form.

Subsequently, the eighth multiplier 360 multiplies the data output from the adder 350 by the scrambling code S _{c-msg, n} to scramble the data. Since the scrambling code is uniquely determined for each physical common packet channel, a corresponding scrambling code is used according to the physical common packet channel used for transmission.

The packet data generated according to the process is transmitted to the base station.

As described above, according to the apparatus and method for transmitting a common packet channel according to the present invention, a plurality of data portions of a physical common packet channel message are transmitted according to a maximum data rate that the mobile station intends to transmit, and at this time, a multi-code By channelizing each data portion, data can be transmitted even when the maximum data rate is 960 kbps or more, and thus a large amount of packet data can be transmitted at a high speed at one time.

In addition, the apparatus and method for transmitting a common packet channel according to the present invention can transmit data up to 5760 kbps, thereby improving the operation yield of mobile stations and base stations.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the examples, but should be defined by the claims.

Claims (6)

A first channelizing unit receiving a predetermined number of data portions of the data portions to be transmitted through the I channel and channelizing each of the data portions; A second channelizing unit receiving the remaining data portion and the control portion of the data portion through a Q channel and channelizing each of them; A first adder for adding portions of data channelized in the first channelizer, respectively; A second adder for adding a data portion and a control portion channeled in the second channelizer, respectively; An imaginary converter for converting the data output from the second summer into a complex form; An adder for adding data output from the imaginary converter and data output from the first summer unit; And a multiplier configured to multiply the data output from the adder by the scrambling code. The method of claim 1, wherein the first channelization unit, A first multiplier for multiplying a first data portion of the input data portion by a channelization code of a specific node; A second multiplier for multiplying a third data portion of the input data portion by a channelization code of a specific node; And a third multiplier for multiplying a fifth data portion by a channelization code of a specific node among the inputted data portions. The method of claim 1, wherein the second channelization unit, A fourth multiplier for multiplying a channelization code of a specific node by a second data portion of the input data portion; A fifth multiplier for multiplying a fourth data portion of the input data portion by a channelization code of a specific node; A sixth multiplier for multiplying a sixth data portion of the input data portion by a channelization code of a specific node; And a seventh multiplier that multiplies the inputted control part by a channelization code of a specific node. Checking the maximum data rate to be transmitted, When the maximum data rate exceeds a specific value, a predetermined number of data portions of the data portions to be transmitted are input to the I channel, and each channel is multiplied by a specific channelization code, and the remaining data portions and the control portion are input to the Q channel. Receiving and multiplying each channel by a specific channelization code; Adding the channelized data portion and the control portion in a complex form; And scrambling the data added in the complex form by multiplying a scrambling code. The method of claim 4, wherein in the channelization step, Channelization codes for the data portion entered through the I channel or through the Q channel include the C (4, 1), C (4, 3) and C (4, 2) nodes of the orthogonal variable spreading rate code tree. Select and use any of the codes in And a code of a C (256, 0) node of an orthogonal variable spreading rate code tree is selected and used as the channelization code for the control part input through the Q channel. The data portion input through the I channel is any one of a first data portion, a third data portion and a fifth data portion among data portions to be transmitted. And a data portion input through the Q channel is any one of a second data portion, a fourth data portion, and a sixth data portion among data portions to be transmitted.