KR20020055227A - Up-link data transmission method using common packet channel in mobile communication system - Google Patents

Abstract

The present invention provides a method for transmitting uplink data using a common packet channel in an International Mobile Telecommunication (IMT) -2000 system, and more particularly, a mobile communication system transmitting a common packet channel instead of a random access channel when transmitting uplink data. The present invention relates to a method for transmitting uplink data using a common packet channel in. According to the uplink data transmission method using a common packet channel in a mobile communication system according to the present invention, by using a common packet channel for uplink data transmission, The system channel capacity and data transmission efficiency are increased according to the characteristics of the common packet channel.

Description

Uplink data transmission using common packet channel in mobile communication system {UP-LINK DATA TRANSMISSION METHOD USING COMMON PACKET CHANNEL IN MOBILE COMMUNICATION SYSTEM}

The present invention relates to a method for transmitting uplink data using a common packet channel (CPCH) in an International Mobile Telecommunication (IMT) -2000 system. More specifically, the present invention relates to a method of transmitting uplink data using a common packet channel in a mobile communication system that transmits using a common packet channel instead of a random access channel (RACH) during uplink data transmission.

In recent years, the development of mobile communication system is very rapid in each country. Looking at the development stage of the mobile communication system up to now, the digital mobile communication method is divided into frequency division multiple access (FDMA), time division multiple access (TDMA), and code division multiple access (CDMA) It is proposed and the development of the next generation mobile communication system IMT-2000 system is in full swing.

Conventional CDMA mobile communication systems use a random access channel for the radio channel in the uplink when browsing the web. That is, when a packet is generated in the physical layer, which is layer 3 of the terminal, the radio resource control layer of the terminal transmits the packet on an access burst of a random access channel. In this case, the above-described random access channel has three drawbacks. First of all, since the random access channel is a common resource, collision due to contention in the terminal frequently occurs, and second power control does not allow high Eb / No. Third, due to the limited amount of data, when one data exceeds one access burst, it has to be transmitted through two or more races or allocated a dedicated channel.

Therefore, due to the shortcomings of the random access channel described above, the CDMA mobile communication system using the wireless channel in the conventional uplink as a random access channel is significantly lowered in data transmission efficiency, and thus the IMT-2000 Frequency Division Duplex (FDD) scheme is used. When applied to, there was a problem that the efficiency of the web browsing service is inferior.

Accordingly, the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a system channel capacity and data transmission efficiency by using a common packet channel for uplink data transmission. An uplink data transmission method using a common packet channel is provided.

In order to achieve the above object, an uplink data transmission method using a common packet channel in a mobile communication system according to the present invention includes a physical layer, an access control sublayer higher than the physical layer, and an access control sublayer. In the uplink data transmission method using a common packet channel in a mobile communication system having a terminal having a stack structure of a communication protocol composed of a radio link control layer which is a layer,

A tenth step of, when the access control sublayer receives a data transmission request from a radio link control layer, requests the physical layer for information on whether to use a common packet channel;

A 20th step in which the physical layer transmits information on whether a common packet channel is used to the access control sublayer;

If the access control sublayer determines that the common packet channel is available, requesting access to the common packet channel to the physical layer;

A 40th step of, after the physical layer performs an access processing procedure of a common packet channel to a base station, notifying the access control sublayer of success or failure of the channel access processing procedure;

If the access control sublayer has succeeded in accessing the common packet channel, generating a data in a format suitable for the common packet channel and transmitting the data to the physical layer; And

And a sixty step of the physical layer carrying data received from the access control sublayer on a common packet channel and transmitting the data to the base station.

1 is a block diagram showing a protocol stack of a terminal in a mobile communication system according to the present invention;

2 is a flowchart illustrating an uplink data transmission method using a common packet channel in a mobile communication system according to an embodiment of the present invention;

3 is an operation flowchart illustrating a detailed operation of the tenth step S10 in the uplink data transmission method using the common packet channel in the mobile communication system according to FIG. 2;

4 is an operation flowchart showing a detailed operation of step 30 (S30) in the uplink data transmission method using a common packet channel in the mobile communication system according to FIG.

5 is an operation flowchart illustrating a detailed operation of step 40 (S40) in the uplink data transmission method using a common packet channel in the mobile communication system according to FIG. 2;

6 is an operation flowchart illustrating a detailed operation of the 50 th step S50 in the uplink data transmission method using the common packet channel in the mobile communication system according to FIG. 2;

FIG. 7 is an operation flowchart illustrating a detailed operation of step 60 (S60) in the uplink data transmission method using a common packet channel in the mobile communication system according to FIG. 2;

8 is a signal flowchart illustrating a method for transmitting uplink data using a common packet channel in the mobile communication system according to FIG. 2.

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

100: terminal 101: physical layer

102: access control sublayer 103: radio link control layer

200: base station

Hereinafter, an uplink data transmission method using a common packet channel in a mobile communication system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a protocol stack of a terminal in a mobile communication system according to an embodiment of the present invention. The protocol stack of the terminal 100 in a mobile communication system according to an embodiment of the present invention is a physical layer ( L1) 101, an access control sublayer (MAC) 102, and a radio link control layer (RLC) 103.

The physical layer 101 in the protocol stack structure of the terminal 100 is a lowermost protocol layer providing a transparent transmission path to the access control sublayer 102, which is a higher layer, and receives a message from the access control sublayer 102. When receiving the transmission to the base station 200, while receiving a message from the base station 200 serves to transmit it to the access control sublayer (102).

In addition, the access control sublayer 102 in the protocol stack structure of the terminal 100 is higher than the physical layer 101 and performs an access control and communication control function.

Meanwhile, the radio link control layer 103 in the protocol stack structure of the terminal 100 serves as a sibling layer with the access control sublayer 102 and performs a control function for the radio link.

Next, an uplink data transmission method using a common packet channel in the mobile communication system according to an embodiment of the present invention using the protocol stack of the mobile communication system having the above configuration will be described with reference to FIGS. 2 and 8. Let's do it.

First, the physical layer 101 in the terminal 100 periodically receives all uplink parameters (RRC info relevant for CSICH) from the base station 200 and stores the information.

When the data transmission request is received from the radio link control layer 103, the access control sublayer 102 in the terminal 100 requests information on whether the common packet channel is used to the physical layer 101 ( S10).

Hereinafter, the detailed operation of the tenth step S10 will be described in more detail with reference to FIG. 3. First, the access control sublayer 102 transmits a data transmission request signal from the radio link control layer 103. It is determined whether (MAC-D-Data-REQ) has been received (S11).

At this time, if the data transmission request signal (MAC-D-Data-REQ) is not received from the radio link control layer 103 in the eleventh step (S11) (NO), the access control sublayer 102 is When the process proceeds to the eleventh step S11 again and the data transmission request signal MAC-D-Data-REQ is received from the radio link control layer 103 (YES), the access control sublayer 102 In order to request information on whether the common packet channel is used, the common packet channel status request signal (PHY-CPCH-Status-REQ) is transmitted to the physical layer 101 (S12).

Then, after the above-described tenth step S10, the physical layer 101 receives the common packet channel status request signal (PHY-CPCH-Status-REQ) from the access control sublayer 102, and then the common packet channel. Information on whether to use the PHY-CPCH-Status-CNF is transmitted to the access control sublayer 102 (S20).

Meanwhile, the access control sublayer 102 determines that the common packet channel is available by reading information (PHY-CPCH-Status-CNF) on whether the common packet channel received from the physical layer 101 is used. In step S30, the physical layer 101 transmits an access request signal (PHY-Access-REQ) of a common packet channel.

Hereinafter, the detailed operation process of the thirtieth step S30 will be described in more detail with reference to FIG. 4. First, whether the access control sublayer 102 uses a common packet channel from the physical layer 101 is described. It is determined whether information about PHY-CPCH-Status-CNF has been received (S31).

At this time, if the information on whether to use the common packet channel (PHY-CPCH-Status-CNF) is not received from the physical layer 101 in step 31 (S31) (NO), the access control sublayer ( 102 proceeds back to the thirty-first step (S31), and if the information on whether to use a common packet channel (PHY-CPCH-Status-CNF) is received from the physical layer 101 (YES), the access The control sublayer 102 checks the Persistence parameter in the information (PHY-CPCH-Status-CNF) on whether the common packet channel is used, and determines whether the common packet channel is currently available ( S32).

At this time, if the current common packet channel is available in the 32nd step S32 (YES), the access control sublayer 102 transmits the access request signal PHY- of the common packet channel to the physical layer 101. Access-REQ) is transmitted (S33).

On the other hand, if the current common packet channel is not available (NO) in the thirty-second step S32 (NO), the access control sublayer 102 provides information on whether the common packet channel is used in the physical layer 101. After requesting again, the process proceeds to the thirty-first step S31 (S34).

On the other hand, after the above-described thirtieth step (S30), the physical layer 101 performs the access processing procedure of the common packet channel to the base station 200, the access success or failure of the channel access processing procedure; The control sublayer 102 is notified (S40).

Hereinafter, the detailed operation process of the forty-seventh step S40 will be described in more detail with reference to FIG. 5. First, the physical layer 101 includes access preamble information of a common packet channel (Access Preamble (AP)). To transmit to the base station 200 (S41).

Thereafter, the physical layer 101 determines whether an AP-AICH with matching signature has been received from the base station 200 in response to obtaining the access preamble of the common packet channel (S42).

In this case, when the AP-AICH with matching signature is received from the base station 200 in response to acquiring an access preamble of the common packet channel (YES), the physical layer 101 is determined. The collision status check request signal (Collsion Detection) is transmitted to the base station 200 (S43).

Thereafter, the physical layer 101 determines whether channel allocation information (CD / CA-ICH with specific channel assignment) including a collision status response is received from the base station 200 (S44).

At this time, if the channel allocation information (CD / CA-ICH with specific channel assignment) including the collision status response is received from the base station 200 in the 44th step (S44) (YES), the physical layer 101 Transmits the confirmation information (PHY-Access-CNF) on whether the common packet channel access is successful to the access control sublayer 102 (S45).

On the other hand, in the 42nd step S42, the AP-AICH with matching signature is not received from the base station 200 for acquiring the access preamble of the common packet channel (NO), or the 44th step ( In S44, if the channel allocation information (CD / CA-ICH with specific channel assignment) including the collision status response is not received from the base station 200 (NO), the physical layer 101 transmits a common packet channel. After performing the error processing for (S46).

In addition, after the forty-second step S40, when the access procedure for the common packet channel succeeds, the access control sublayer 102 generates data in a format suitable for the common packet channel and stores the data in the physical layer. The transmission to the layer 101 (S50).

Hereinafter, the detailed operation process of the above-described 50th step S50 will be described in more detail with reference to FIG. 6. First, the access control sublayer 102 succeeds in accessing a common packet channel from the physical layer 101. After receiving confirmation information (PHY-Access-CNF) on whether or not, it is determined whether the access procedure for the common packet channel is successful (S51).

At this time, if the access procedure for the common packet channel succeeds (YES) in the 51 st step (S51), the access control sublayer 102 generates data in a format suitable for the common packet channel, and then Together, the data transmission request signal PHY-DATA-REQ is transmitted to the physical layer 101 (S52).

On the other hand, if the access procedure for the common packet channel fails in the 51 st step S51 (NO), the access control sublayer 102 terminates after performing error processing for the transmission operation of the common packet channel. (S53).

On the other hand, after the 50 th step (S50) described above, the physical layer 101 loads the data received from the access control sublayer 102 in a common packet channel and transmits it to the base station 200 (S60).

Hereinafter, the detailed operation process of the above sixty step (S60) will be described in more detail with reference to FIG. 7, wherein the physical layer 101 transmits preamble information (CLIM) of data to the base station 200. Transfer to (S61).

Thereafter, the physical layer 101 receives the transmission power control message (TPC for CLPC) from the base station 200 and adjusts the transmission power to correspond to the control message (S62).

Subsequently, the physical layer 101 loads the data received from the access control sublayer 102 on the common packet channel (PHY-CPCH) and transmits the data to the base station 200 (S63).

Thereafter, the physical layer 101 receives a data reception completion message (DPCH) from the base station 200 and transmits it to the access control sublayer 102 (S64).

As described above, according to the uplink data transmission method using the common packet channel in the mobile communication system according to the present invention, by using the common packet channel in the uplink data transmission, the system channel capacity and data according to the characteristics of the common packet channel There is an excellent effect of increasing the transmission efficiency.

Claims (9)

Common packet channel in a mobile communication system having a terminal having a stack structure of a communication protocol including a physical layer, an access control sublayer higher than the physical layer, and a radio link control layer equal to the access control sublayer In the uplink data transmission method using A tenth step of, when the access control sublayer receives a data transmission request from a radio link control layer, requests the physical layer for information on whether to use a common packet channel; A 20th step in which the physical layer transmits information on whether a common packet channel is used to the access control sublayer; If the access control sublayer determines that the common packet channel is available, requesting access to the common packet channel to the physical layer; A 40th step of, after the physical layer performs an access processing procedure of a common packet channel to a base station, notifying the access control sublayer of success or failure of the channel access processing procedure; If the access control sublayer has succeeded in accessing the common packet channel, generating a data in a format suitable for the common packet channel and transmitting the data to the physical layer; And And a sixty step of the physical layer loading data received from the access control sublayer onto a common packet channel and transmitting the data to the base station. The method of claim 1, The tenth step may include: an eleventh step of the access control sublayer determining whether a data transmission request is received from a radio link control layer; And If the data transmission request is not received from the radio link control layer in the eleventh step, the process proceeds to the eleventh step again. If the data transmission request is received from the radio link control layer, the access control sublayer uses the common packet channel. The uplink data transmission method using a common packet channel in a mobile communication system, comprising the twelfth step of requesting information on whether or not to the physical layer. The method of claim 1, The thirty-third step may include: a thirty-first step of determining, by the access control sublayer, whether information on whether to use a common packet channel is received from the physical layer; If the information on whether to use the common packet channel is not received from the physical layer in step 31, the process proceeds to the thirty-first step again, and when the information on whether to use the common packet channel is received from the physical layer, A thirty-second step of the access control sublayer checking the persistence parameter in the information on whether the common packet channel is used, and determining whether the common packet channel is currently available; And In step 32, if the current common packet channel is available, the access control sublayer comprises a 33rd step of requesting access to a common packet channel to the physical layer. Uplink data transmission method using a. The method of claim 3, wherein If the current common packet channel is not available in the thirty-second step, the thirty-fourth step in which the access control sublayer requests information on whether the common packet channel is used by the physical layer and proceeds to the thirty-first step Uplink data transmission method using a common packet channel in a mobile communication system characterized in that it further comprises. The method of claim 1, The forty-seventh step may include: forty-first step of the physical layer transmitting access preamble information of a common packet channel to the base station; Step 42, wherein the physical layer determines whether a response to acquiring an access preamble of a common packet channel is received from the base station; Step 43, when the physical layer receives a response to the access preamble acquisition of the common packet channel from the base station in step 42, requesting confirmation of a collision state from the base station; A 44th step of the physical layer determining whether channel allocation information including a collision status response is received from the base station; And In step 44, when the channel allocation information including the collision status response is received from the base station, the physical layer notifies the access control sublayer of confirmation information on whether the common packet channel access is successful. Uplink data transmission method using a common packet channel in a mobile communication system, characterized in that made. The method of claim 5, If a response for acquiring an access preamble of a common packet channel is not received from the base station in step 42 or if channel allocation information including a collision status response is not received from the base station in step 44, the physical layer And a forty-sixth step of terminating after performing error processing on the transmission operation of the common packet channel, wherein the uplink data transmission method using the common packet channel in the mobile communication system. The method of claim 1, In the fifty-fifth step, after the access control sublayer receives confirmation information on whether the common packet channel is successfully accessed from the physical layer, it is determined whether the access procedure for the common packet channel is successful. ; And In step 51, if the access procedure for the common packet channel is successful, the access control sublayer generates data in a format suitable for the corresponding common packet channel and transmits a data transmission request signal to the physical layer together with the data. The uplink data transmission method using a common packet channel in a mobile communication system, comprising the fifty-second step. The method of claim 7, wherein And if the access procedure for the common packet channel fails in step 51, the access control sublayer further includes a step 53 of terminating after performing error processing on a transmission operation of a common packet channel. An uplink data transmission method using a common packet channel in a mobile communication system. The method of claim 1, The sixty sixth step includes: the sixty-one step of transmitting, by the physical layer, preamble information of data to the base station; Step 62, after the physical layer receives the transmission power control message from the base station, adjusting the transmission power to correspond to the control message; Step 63, the physical layer loading data received from the access control sublayer onto a common packet channel and transmitting the data to the base station; And And a sixty-sixth step in which the physical layer receives a data reception completion message from the base station and transmits the data reception completion message to the access control sublayer.