KR100469716B1 - Apparatus and method for designating a reverse common channel for dedicated communication in a mobile communication system - Google Patents

Abstract

A method for transmitting a message by dedicating a reverse common channel by a base station of a code division multiple access communication system includes a channel that dedicates a reverse common channel for receiving a response message when a base station needs to receive a response through a reverse common channel. And the base station designates a reverse common channel as a dedicated channel, and then generates a dedicated channel designation parameter including information including a dedicated indication and an operation time of the reverse common channel and transmits the message along with a message. And, the base station transmits the reverse common channel dedicated message characterized in that the process of receiving a response message received through the dedicated reverse common channel.

A method for transmitting a message by designating a reverse common channel as a dedicated channel by a mobile station of a code division multiple access communication system includes receiving a message transmitted on a forward common channel, analyzing a received forward common channel message, If the message includes a dedicated channel designation parameter including a dedicated indication for dedicating a reverse common channel, and a time to operate as a dedicated channel, the dedicated common mode of the reverse common channel is specified. A mobile station comprising a process of generating a response message, assigning a dedicated channel spreading code of the mobile station to a reverse common channel and designating the channel as a dedicated channel, and transmitting a response message generated during an operation time through a reverse common channel. Send the message by designating the channel as a dedicated channel.

Description

Dedicated communication device and method for reverse common channel in mobile communication system {APPARATUS AND METHOD FOR DESIGNATING A REVERSE COMMON CHANNEL FOR DEDICATED COMMUNICATION IN A MOBILE COMMUNICATION SYSTEM}

The present invention relates to an apparatus and method for reverse common channel communication in a code division multiple access communication system, and more particularly, to an apparatus and method for communicating by designating a reverse common channel as a channel dedicated to a specific mobile station.

Conventional CDMA mobile communication systems have provided voice-oriented services, but have gradually developed to the IMT-2000 standard that enables high-speed data transmission as well as voice. In the IMT-2000 standard, services such as high quality voice, moving picture, and internet search are possible.

The characteristics of data communication performed in the mobile communication system are achieved through a dedicated channel and a common channel. The dedicated channel and the common channel are present in both a reverse link and a forward link. Here, the common channel is a channel that the base station should use in common with several mobile stations. Therefore, when several mobile stations try to communicate at the same time, a collision occurs and smooth communication cannot be performed. The problem of this common channel is relatively larger than that of the reverse direction.

However, when data is transmitted through the dedicated channel, since the base station and the mobile station communicate with each other through a dedicated allocated channel, there is no probability of failure due to a collision between channels, and transmission of a message transmitted by the base station or the mobile station. The probability of success is very high. However, when data is transmitted on the common channel, the transmission success probability is low. Due to the low transmission success rate, the mobile station repeatedly performs a retransmission access operation in order to attempt to access the base station. Therefore, the mobile communication system frequently performs the retransmission process, thereby increasing the waste of resources and interference between channels.

Accordingly, an object of the present invention is to provide an apparatus and method for improving transmission performance of a common channel when a base station and a mobile station communicate through a common channel in a code division multiple access communication system.

Another object of the present invention is to provide an apparatus and method for designating a base station to use a dedicated common channel of a specific mobile station in a code division multiple access communication system.

It is still another object of the present invention to transmit a control message including a spreading code and information of a common power control channel for a base station to dedicate a common channel in a code division multiple access communication system, and for a mobile station to transmit according to a control message. The present invention provides an apparatus and method capable of communicating by dedicating a reverse common channel between a base station and a mobile station by transmitting user data by a designated spreading code.

It is still another object of the present invention to provide a message structure and an interface method between layers in a signal layer of a base station for designating a reverse common channel between a base station and a mobile station as a dedicated common channel in a code division multiple access communication system. have.

It is still another object of the present invention to provide a method of configuring a message added at a signal layer of a base station and an interface method between layers in a code division multiple access communication system to release a common channel designated as a dedicated state between a base station and a mobile station.

It is still another object of the present invention to provide a method of configuring a message and an interface method between layers in a signal layer of a mobile station for designating and releasing a common channel between a base station and a mobile station as a dedicated channel in a code division multiple access communication system. .

Another object of the present invention is to provide a method of configuring a message added at a link access control layer of a base station and an interface method between layers in order to designate a reverse common channel between a base station and a mobile station as a dedicated channel in a code division multiple access communication system. have.

It is still another object of the present invention to provide a method of configuring a message and an interface method between layers in a link access control layer of a base station to release a common channel designated as a dedicated state between a base station and a mobile station in a code division multiple access communication system. .

It is still another object of the present invention to provide a method of configuring a message and an interface method between layers in a link access control layer of a mobile station for designating and releasing a common channel between a base station and a mobile station as a dedicated channel in a code division multiple access communication system. Is in.

Another object of the present invention is to provide a method of configuring a message and an interface method between layers added to a medium access control layer of a base station to designate a reverse common channel between a base station and a mobile station as a dedicated channel in a code division multiple access communication system. have.

It is still another object of the present invention to provide a method of configuring a message and an interface between layers in a medium access control layer of a base station to release a common channel designated as a dedicated state between a base station and a mobile station in a code division multiple access communication system. .

It is still another object of the present invention to provide a method of configuring a message and an interface method between layers in a medium access control layer of a mobile station for designating and releasing a common channel between a base station and a mobile station as a dedicated channel in a code division multiple access communication system. Is in.

According to an embodiment of the present invention, a base station of a code division multiple access communication system according to an embodiment of the present invention dedicates a reverse common channel to transmit a message, when the base station receives a message through a reverse common channel. Designating a reverse common channel for receiving the response message as a dedicated channel, and after the base station designates the reverse common channel as a dedicated channel, including a dedicated display and an operation time of the reverse common channel; Generating a dedicated channel designation parameter including information and transmitting the message together with the message; and the base station receives a response message received through the dedicated reverse common channel; And transmits a dedicated message.

In addition, a method for transmitting a message by designating a reverse common channel as a dedicated channel by a mobile station of a code division multiple access communication system includes receiving a message transmitted on the forward common channel, and receiving a message of the received forward common channel. When the message includes a dedicated channel designation parameter including a dedicated indication for dedicating a reverse common channel and a time to operate as a dedicated channel, the dedicated common mode of the reverse common channel is specified. Generating a response message of the received message, assigning a dedicated channel spreading code of the mobile station to the reverse common channel, and designating the channel as a dedicated channel, and transmitting the response message generated at the operation time through the reverse common channel. Mobile station designates a reverse common channel as a dedicated channel and Characterized in that it transmits the message.

In addition, an apparatus in which a base station of a code division multiple access communication system according to an embodiment of the present invention is dedicated to a reverse common channel to achieve the above object operates as a dedicated display for dedicating a reverse common channel and a dedicated channel. A message generator for generating a dedicated common channel message including a time to perform a forwarding, and generating a forward common channel message including the generated dedicated channel specific parameter, and a forward common channel transmitter for transmitting a message of the forward common channel And a reverse common channel receiver which is reserved when the forward common channel message is transmitted, and which is allocated by a dedicated channel spreading code of the mobile station for the reserved time and receives a response from the mobile station.

In addition, an apparatus for transmitting a message in which a mobile station of a code division multiple access communication system designates a reverse common channel as a dedicated channel includes a forward common channel receiver for receiving a message transmitted on the forward common channel, and the received forward common channel. Message, and if the message includes a dedicated channel designation parameter including a dedicated indication for dedicating a reverse common channel and a time to operate as a dedicated channel, dedicate a reverse common channel. A message analyzer for designating a mode and generating a response message of the received message; and if a dedicated mode is specified, a dedicated common channel spreading code of the corresponding mobile station is specified, and a reverse common channel for transmitting a response message generated in the operation time is provided. It is characterized by consisting of a transmitter.

1 is a diagram illustrating a basic procedure for dedicating a reverse common channel according to an embodiment of the present invention.

2 is a diagram illustrating a scheme for dedicating a reverse common channel and a message transmission procedure of a base station in a signal layer according to an embodiment of the present invention.

3 is a diagram illustrating a scheme for dedicating a reverse common channel and a message receiving procedure of a base station in a signal layer according to an exemplary embodiment of the present invention.

4 is a diagram illustrating a procedure from when a mobile station receives a message to transmitting a response message when the reverse common channel is dedicated in the signal layer according to an embodiment of the present invention.

5 is a flow diagram of a message transmission processing of a base station according to an embodiment of the present invention performed by the same procedure as in FIG.

FIG. 6 is a flow diagram illustrating a message reception process of a base station according to an embodiment of the present invention performed by the procedure of FIG. 3.

7 is a flowchart illustrating a response message processing of a reverse common control channel of a mobile station according to an embodiment of the present invention performed by the procedure of FIG. 4.

8A illustrates a case of requesting CE reservation in a signal layer based on a scheme for dedicating a reverse common channel and a message transmission procedure of a base station in a link access control layer according to an embodiment of the present invention.

8B illustrates a case of requesting CE reservation in the link access control layer based on a scheme for dedicating a reverse common channel in a link access control layer and a message transmission procedure of a base station according to an embodiment of the present invention.

FIG. 9A illustrates a case of releasing a reservation of CE in a signal layer based on a scheme for dedicating a reverse common channel and a message reception procedure of a base station in a link access control layer according to an embodiment of the present invention.

9B illustrates a case of releasing a reservation of CE in the link access layer based on a scheme for dedicating a reverse common channel and a message reception procedure of a base station in a link access control layer according to an embodiment of the present invention.

10 is a procedure for receiving and transmitting a message in a mobile station when dedicating a reverse common channel according to an embodiment of the present invention.

11 is a diagram illustrating a transmission operation of dedicating a common channel in a medium access control layer of a base station according to another embodiment of the present invention.

12 is a diagram illustrating a reception operation of dedicating a common channel in a media access control layer of a base station according to another embodiment of the present invention.

FIG. 13 is a diagram illustrating a procedure for communicating a signal over a dedicated reverse common channel in a media access control layer of a mobile station according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

When performing a reverse common channel communication between a base station and a mobile station in a CDMA communication system, an embodiment of the present invention temporarily dedicates a reverse common channel between a base station and a specific mobile station to improve the access success rate of the reverse common channel. do. That is, in order to increase the transmission performance of the reverse channel in the CDMA communication system, the common channel is dedicated. As described above, a method of using a common channel by dedicating it is Korean Patent Application No. 1998-14179, 1998-13150, 1998-14274, 1998-14275, 1998-14276, 1998-14880 And the like. When the base station and the mobile station attempt to communicate through the common channel, the common channel dedicated method allocates resources of the common channel through which the mobile station accesses the base station to dedicated or quasi-dedicated channels. It is a method of increasing transmission success rate by preventing the operation of a specific mobile station from transmitting data to a base station by a signal.

The present invention relates to a method of dedicating a reverse common channel between a base station and a mobile station in a code division multiple access communication system. In a first embodiment of the present invention, a message added to a signal layer (Layer 3) of a base station is configured. And contents of the interface between the hierarchies, the structure of the message, the communication method, and the like configured when the mobile station transmits the response message.

In the second embodiment of the present invention, the configuration of the message added in the Link Access Control Layer (LAC) of the base station, the contents of the interface between the layers, and the message configured when the mobile station transmits the response message. It includes the structure and communication method.

In addition, according to the third embodiment of the present invention, the message is configured in the medium access control layer (MAC) of the base station, the contents of the interface between the layers, and the message configured when the mobile station transmits the response message. It includes the structure, communication method, and so on.

The present invention relates to an apparatus and method for dedicating a reverse common channel between a base station and a mobile station in a code division multiple access communication system. The present invention relates to a configuration of a message added in a signal layer (Layer 3) of a base station and an interface between layers. And a structure of the message, a communication method, and the like configured when the mobile station transmits the response message. In addition to the method of dedicating the reverse common channel in the signal layer described in the embodiment of the present invention, the delegation of the reverse common channel may be performed in the LAC layer. In this case, if a message field added in the signal layer is added in the LAC layer, an interface between the protocol layers may bring about a change.

An embodiment of the present invention provides a scheme for dedicating a reverse common channel of a code division multiple access mobile communication system and an interface between a communication device and a protocol layer. For this purpose, a base station uses a spreading code to dedicate a reverse common channel. The control message including the long code information and the common power control channel information is transmitted through the forward common channel, and the mobile station responds to the control message transmitted to the base station. In this case, the base station and the specific mobile station are in a state in which the common channel is designated as a dedicated state, and the user data is transmitted through the dedicated common channel without competing with other mobile stations through the channel. The reverse common channel in the embodiment of the present invention refers to a reverse access channel (R-ACH), a reverse common control channel (R-CCCH), and a reverse enhanced access channel (Reverse Enhanced Channel). Access Channel, R-EACH).

When the common channel is dedicated as described above, it ensures fast response time in the process of transmitting the message to the reverse common channel, increases the probability of success of the common channel, and also interferes with each other caused by retransmission. Etc., and the number of fields added in the LAC layer can be reduced to reduce an error that may occur when transmitting a message.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. A communication method and a configuration diagram of a base station and a mobile station according to an embodiment of the present invention are as follows.

1 shows a procedure for dedicating a common channel in a mobile station and a base station. FIG. 1 is a diagram illustrating a procedure performed when a base station requests a mobile station to dedicate a common channel. The mobile station receives a parameter for dedicating a common channel from the base station through a message.

Referring to 1, in order to dedicate a common channel, the base station transmits dedicated channel assignment parameters for dedicating a common channel to a mobile station through a forward common channel in step 101. The specified parameters include the Dedicated Channel Indication Field (DESINGNATED_MODE_INCL), Dedicated Channel Indicator (DESIGNATED_MODE), Address of Common Power Control Channel (DAM_ADDRESS: Designated Access Mode), Rate (RATE_WORD) and Action Time (Action Time). . The operating time can be transmitted in addition to the message or set arbitrarily within the system. When the action time is added to the message and transmitted, the action time may be included in the message dedicated to the common channel or included in the access parameter message. Accordingly, when the base station intends to communicate with a specific mobile station by designating a common channel as a dedicated channel, the base station includes a message field including the five parameters described above in the L3, LAC, or MAC layer in the message transmitted by the base station. To transmit to the mobile station. When the mobile station analyzes the message received from the base station and determines that the received message includes the dedicated channel designation parameters, the mobile station dedicates a reverse common channel according to the dedicated channel designation parameter in step 102. And transmits a response message to the base station through the dedicated reverse common channel. In this case, the response message may be a response message of the mobile station to a message transmitted from the base station or a user data traffic message of the mobile station. In this case, since user traffic data transmitted from the mobile station to the base station is transmitted after the common channel is dedicated, a message longer than the length of a frame provided by the physical layer may be segmented and transmitted. In this case, when the reverse common channel is designated as a dedicated channel and used, the mobile station performs scheduling on the reverse common channel in an electric serial number (ESN) mask, a private long code mask, or a base station. A Schedulled Reverse Common Control Channel (R-CCCH) longcode mask can be used to assign a specific time to the. In the case of using a Schedulled R-CCCH mask, the mobile station configures a mask using an address of a common power channel referred to when the reverse common channel is dedicated.

The communication procedure and method between the base station and the mobile station for performing the method for configuring the reverse common channel in the signal layer (Layer 3, Signaling layer) of the base station to dedicate the reverse common channel as shown in FIG. .

Table 1 below is an example of messages transmitted by the base station to the mobile station through the forward common channel. The messages shown in Table 1 below are messages that the mobile station must respond to the base station through the reverse common channel when the base station transmits the forward common channel. In an embodiment of the present invention, when a base station transmits messages as shown in Table 1 below, the base station includes the dedicated channel assignment parameters and transmits the received mobile station. An example of transmitting a corresponding response message after dedicating a channel will be described.

Message Title on f-csch Status Request Message TMSI Assignment Message General Page Message SSD Update Message Authentication challenge Message Base Station confirmation Challenge Order Extended Release Message Service Redirection Message Data Burst Message Service Release Message Order Message

For example, in Table 1, if a status request message is transmitted through a forward common signaling channel (f-csch), which is a logical channel of a forward common channel, the mobile station is a logical channel of a common channel of a reverse link. A status response message is transmitted through a reverse common signaling channel (r-csch). Since the messages shown in Table 1 are transmitted on the reverse common channel in the existing mobile communication system, the transmission success probability is lowered, and thus, interference with other mobile stations may be caused by retransmission due to transmission failure. have. Therefore, if the above messages are transmitted using the method of dedicating the reverse common channel proposed in the embodiment of the present invention, the transmission performance can be improved. In addition to the message shown in Table 1, user data may also be transmitted by using the dedicated reverse common channel when transmitting user data from the base station to the mobile station and transmitting a response from the mobile station to the base station.

In order to dedicate the reverse common channel described above, when the messages shown in Table 1 are transmitted to the mobile station, the dedicated channel designation parameter for dedicating the common channel as shown in Table 2 is defined as L3, LAC or the like of the base station. It is added at the MAC layer.

L3 SDUs in Table 1 L3 SDU length in Table 1 DESIGNATED_MODE_INCL One DESIGNATED_MODE 0 or 1 DAM_ADDRESS 0 or 6 RATE_WORD 0 or 3

Although not shown in Table 2, the action time may be added by a message as shown in Table 1 above or may be arbitrarily set in the system. If an activation time is added to the message, it may be added at the signal layer or at the link access layer. However, when it is set inside the system, the base station predicts the time when the message is sent from the mobile station in consideration of the time required for transmitting the message through the common channel from the base station to the mobile station, that is, the propagation delay time and the message processing time. The operating time can be set arbitrarily. In addition to the operation time, it may be added to the message requiring the dedication of the common channel or may be added to the access parameter message. If it is added to an access parameter message, it is received when the mobile station accesses the system and sent to the base station using the stored value when the mobile station has already stored the operating time and received the dedicated channel dedicated instruction. Done.

The dedicated channel designation parameter field to be added to the messages as shown in Table 1 includes four types of parameters (or five kinds of parameters including an operation time) as shown in Table 2, and the mobile station is used as a mobile station. After receiving the message as shown in Table 1 above, a dedicated channel indication (DESIGNATED_MODE_INCL) field, a dedicated channel indicator (DESIGNATED_MODE) field for recognizing an instruction to dedicate a common channel, and a common channel are dedicated. Then, when controlling the power of the message to be transmitted, the address (DAM_ADDRESS) field of the common power control channel, which is an index of the common power control channel, to be referred to, should be added. In addition, a rate (RATE_WORD) field indicating a rate of the dedicated reverse common channel should be added. In addition, an Action Time field should be added to indicate when to send a response message after receiving the above message in the LAC layer. The two fields are information that the base station informs the mobile station, and are added by the base station when the base station transmits a specific message or requests a response from the mobile station to a dedicated common channel.

In order to dedicate the common channel, a specific long code must be used when spreading a reverse channel to a specific mobile station, and the base station reserves a channel element of the base station to receive the reverse channel signal spread with the specific long code. Should be doing.

2 to 7 are diagrams of a first embodiment showing an operation procedure for dedicating a reverse common channel in an L3 layer of a base station and a mobile station, and FIGS. 8A to 10 show link access control of a base station and a mobile station. FIG. 11 is a diagram illustrating an operation procedure for dedicating a reverse common channel in a layer, and FIGS. 11 to 13 illustrate an operation procedure for dedicating a reverse common channel in a media access control layer of a base station and a mobile station. Figures of the third embodiment.

2 is a flowchart illustrating a procedure of adding information for dedicating a reverse common channel in a signal layer of a base station.

Referring to FIG. 2, the base station requests reservation of channel elements of the base station as described above before dedicating a common channel in Layer 3 in step 201. That is, when the message layer L3 needs to receive a response from the mobile station when a message to be transmitted is generated, the signaling layer L3 requests a dedicated mode designation to dedicate the reverse shared channel. In addition, even in the case of the message requesting the reception from the mobile station, the dedicated mode can be designated to dedicate the reverse shared channel. Here, the transmission messages of the base station requiring the response message of the mobile station include a message as shown in Table 1 above. When the response message is to be received by dedicating the reverse common channel as described above, the L3 layer of the base station outputs a mode signal (Designated_Mode) indicating reservation of channel resources.

When the resource controller (RC) receives the channel element reservation request output from the layer 3, the RC transmits a signal to the physical layer to reserve a channel element existing in the physical layer in step 202. At this time, the operation time for notifying when the reservation of the channel element is started is informed together. In this case, the operation time may be transmitted to the mobile station by a message, or may be arbitrarily set in the base station system. (CE_Reserve.Request with action time).

In this case, the action time is set to an appropriate value in consideration of the time required for the base station to receive the response message after the message is transmitted through the forward common channel and the mobile station receives the message, and the link access control (LAC) Is added from The LAC adds 1 bit of USE_TIME and 6 bits of ACTION_TIME with respect to the operation time. In addition, the reservation time of the channel element should also be set. This time (T_designated) is used to prevent the situation that a waste of resources is caused by continuing to occupy the channel element even when a message is not received within the set time. It may be set in consideration of the transmission time of the message through the forward common channel, the processing time of the message of the mobile station and other time consumed (CE reserve. Request with action time).

In particular, the reservation time timer T_designated set in step 203 of FIG. 2 is a necessary timer in case an error occurs in a message transmitted from a base station and the mobile station does not recognize the message and transmits a response message. Accordingly, the operation of the channel element starts at the set action time, and the reservation is continued for the time set in the reservation time timer T-designated. If the message requested by the base station does not arrive until this timer is discarded, the channel element is automatically canceled. This is to prevent channel elements from being reserved and cause waste of resources for more than a certain time, so the value of the T-designated timer must be set to an appropriate value.

The physical layer then informs RC of the reservation of the channel element in step 203. (CE_Reserve.Response). At this time, if the reservation of the channel element is impossible, an impossible signal is generated, and when the reservation is completed, a completion signal is generated. At this time, if reservation is impossible, timer value is not set. (CE reserved at specified action time for T_designated).

Process 204 is a process in which the signal layer receives a signal transmitted from the RC, and indicates that the RC delivers a response of the physical layer to the signal layer. (Designated_Mode.Response). The message configured as described above is transmitted to the mobile station through the forward common channel in step 205. In this case, the DESIGNATED_MODE set to '1' in the message transmitted through the forward common channel is a command for the mobile station to spread the reverse channel with a specific long code, and the long code used here can use the unique ESN of the mobile station. have. (message transmission using forward common channel).

In this case, when the non-reservation signal of the channel element is received by the signal layer, the signal layer sets DESIGNATED_MODE, which is a field added for the dedication of the reverse common channel, to the generated message to '0', and the DAM_ADRESS and RATE_WORD fields. Does not include. At this time, the operation time information (USE_TIME and ACTION_TIME) is not added even in the LAC. This means that it has the same characteristics as a general conventional reverse channel. However, when the reservation response is received, the signal layer sets the DESIGNATED_MODE field to '1', sets the address of the common power control channel to be referred to by the base station in the DAM_ADDRESS field, and provides information about the transmission rate of the set channel in the RATE_WORD field. Set. In the LAC layer, the USE_TIME and ACTION_TIME fields are added. (Designated_Mode, DAM address and Rate_Word setting on this message).

FIG. 5 is a flow chart of dedicated assignment of a reverse common channel of a base station performed by the same process as in FIG. 2.

Referring to FIG. 5, when a message to be transmitted to the forward common channel is generated in step 500, the base station determines whether the message is dedicated to the reverse common channel in step 511. In this case, if the dedicated request message, the dedicated request is made in step 513, and the base station checks whether the channel reservation is possible in step 515. If the channel reservation is possible, the base station reserves the corresponding channel element in step 517 and sets an action time and a reservation time timer (T-designated). In this case, the operation time means a time for the mobile station to transmit a message on the reverse common channel, and the reservation time is a time for the base station to wait to receive a response message of the mobile station through the dedicated reverse common control channel. After setting the operation time and the reservation time timer, in step 519 and 520, the base station generates parameters for dedicating the reverse common channel as shown in Table 2. The parameters for dedicating the reverse common channel include DESIGNATED_MODE_INCL including the dedicated channel indication as described above, DESIGNATED-MODE dedicated channel indicator DESIGNATE-MODE of the common channel, address DAM-ADDRESS of the common power control channel, rate RATE-WORD, and the like. Include. In this case, when the shared channel is designated as a dedicated channel, the base station sets the DESIGNATED_MODE to 1 to designate a reverse common control channel as a dedicated channel, and to set the transmission power and transmission rate of the reverse common control channel. Set the rest of the parameters to the corresponding values. Thereafter, the four types of parameters (or five types of parameters including the operating time) are added to any one of the messages shown in Table 1 and transmitted through the forward common control channel in the set operation time.

However, if there is no reserved channel element in step 515 or if the generated message is not a message for which a dedicated message is requested, the DESIGNATED_MODE is reset to 0, and after deleting the remaining parameter fields, the message is transmitted through a forward common channel. do.

The base station transmits a message (a message requiring a response from the mobile station) through a forward common channel, and then waits for reception of a response message transmitted from the mobile station for a time set in the reservation time timer T-designated.

3 illustrates a method of processing a message when a base station transmits information of a reverse common channel to a mobile station and receives a response message on a reverse common channel dedicated to the mobile station.

Referring to FIG. 3, in step 301, a message is received from a mobile station on a dedicated reverse common channel. If the reverse common channel is not dedicated, the base station is equivalent to receiving a message on an access channel of a conventional mobile communication system. (message reception using designated Reverse common channel).

In step 302, the L3 layer receives the response message from the mobile station and notifies the RC to release the dedicated reverse common channel in response to the response message.

In step 303, the RC notifies the physical layer that the deactivation of the reverse common channel has ended. (CE_Release.Request). Then, the physical layer terminates a demodulation process for demodulating a long code of a specific mobile station, that is, a channel spread to an ESN of a mobile station that transmits information on a dedicated channel, and releases the occupation of the channel element. (CE releasing).

In step 304, the RC is notified that the reservation of the channel element has been released. (CE_Release. Response) Then, in step 305, the RC notifies L3 that the reservation of the channel element is released, thereby deactivating all of the reverse common channel. (Designated_Mode_Release.Response).

As described above, when the base station communicates with a specific mobile station by dedicating a reverse common channel, the base station reserves a channel element and sets a reservation time of the reserved channel element. If the reserved channel element is available, the base station transmits dedicated channel designation parameters of the reverse common channel through the forward common channel at the set operation time. In this case, the dedicated channel designation parameters may be transmitted in addition to one of the messages as shown in Table 1, which the mobile station should respond to via a reverse common channel. The field may include a dedicated channel indication field, a dedicated channel indicator, an address of a common power control channel, a transmission rate, and the like. The dedicated channel indicator may be 1 bit, and when the dedicated channel indicator is set, a spreading code for exclusively using the reverse common channel is generated. At this time, the base station and the specific mobile station control to generate a predetermined dedicated spreading code used for the reverse common channel. In this case, the spreading code used for the dedicated reverse common channel may be one of a long code generated by using an ESN mask unique to a mobile station, a public blank code mask, or one of specific long codes designated for exclusive use of the common channel. Can be generated using

Table 3 below shows fields of a message added in the LAC layer when the mobile station transmits a message on the dedicated channel when the reverse common channel is dedicated. Table 3 below is a message configuration of a link level access control layer (LAC) of a message transmitted from a mobile station when the reverse common channel is dedicated according to an embodiment of the present invention.

Field Basic Mode Designated Mode Length MSG_TYPE M M 8 ACK_SEQ M M 3 MSG_SEQ M M 3 ACK_REQ M M One VALID_ACK M M One ACK_TYPE M M 3 MSID_TYPE M ○ 3 MSID_LEN M ○ 4 MSID M ○ 8 × MSID_LEN

(M: Mandatory, O: Optional, M is a field that must be included at all times, and O is a field that can be excluded only when the reverse common channel is dedicated.)

In Table 3, the basic mode of the message fields is a field of a message added in the LAC layer when the mobile station transmits a message on the reverse common channel. Since the common channel is not a channel assigned to a specific mobile station but is commonly used by a plurality of mobile stations of an arbitrary common channel, the mobile station must transmit its address to the base station so that the base station recognizes the mobile station. . Therefore, fields such as MSID_TYPE, MSID_LEN, and MSID must be added. However, as shown in Table 3, when the reverse common channel is dedicated to a specific mobile station, as described above, fields related to an address for identifying the mobile station (MSID_TYPE, MSID_LEN, MSID, etc.) This eliminates the need to reduce the number of fields added in the LAC layer. This reduction in message length acts as a factor in reducing transmission errors.

In Table 3, MSG_TYPE is a field indicating a transmission characteristic of a message. The ACK_SEQ is a response sequence number for indicating a response to the message transmitted by the base station. The ACK_SEQ stores the sequence of the message transmitted by the base station and confirms the reception of the message by checking the response sequence of the message received from the mobile station. do. MSG_SEQ is a field indicating the order of transmitted messages. ACK_REQ is a field containing a command to transmit a response of the currently sent message. If the ACK_REQ field is set to '1', the base station or mobile station receiving the message should always transmit a response message. VALID_ACK is a field indicating validity of Acknowledgement, and ACK_TYPE is a field indicating termination of Acknowledgement.

As shown in Table 3, the delegation of the reverse common channel not only increases the probability of successful transmission and reduces the interference between channels, but also reduces the message transmission error by reducing the length of the message transmitted from the mobile station to the base station. You have an advantage.

4, when a mobile station receives a message of a forward common channel including the dedicated channel assignment parameters, the mobile station designates a reverse common channel as a dedicated channel and then sends a response message to the base station through the dedicated reverse common channel. It is a figure which shows the process of transmitting.

Referring to FIG. 4, a process 401 shows a process of a mobile station receiving a message of a base station transmitted on a forward common channel. (Message reception using forward common channel). That is, the process 401 transmits a message through the forward common channel including the dedicated channel assignment parameters in process 205 of FIG. 2, and in step 401, the physical layer PHY of the mobile station receives the signal layer L3, which is a higher layer. To transmit.

In step 402, the signal layer L3 of the mobile station recognizes backward common channel information included in the L3 SDU (Service Data Unit) in the signal layer of the base station, generates a response message to the received message, and transmits the response message to the LAC layer. At this time, the signal layer of the base station displays and transmits a command command (Designated Mode indicator placed) to the message control status block (MCSB) to transmit the message currently transmitted to the LAC on a dedicated reverse common channel.

Then, the LAC analyzes the MCSB received with the L3 SDU and recognizes that the currently received message is transmitted through the reverse dedicated channel. Then, as shown in Table 3, the fields related to the ID of the mobile station (MSID, MSID_TYPE, In step 403, the LAC protocol data unit (PDU) and the PDU control status block (PCSB) configured in the LAC are transmitted to the MAC layer without adding MSID_LEN. Here, the LAC PDU includes the MSID related fields, and the PCSB includes a Designated Mode indicator placed on a dedicated reverse channel.

In step 403, the MAC receiving the LAC PDU and the PCSB transmits a signal to the physical layer to spread and transmit a message to be transmitted using a unique long code of the mobile station to the physical layer. (Designated_Long_Code.Request).

The physical layer uses an ESN or a specific long code mask, that is, a designed long code mask for designating the reverse common channel as a dedicated channel according to the command of the signal received in step 404. A spreading code is generated, and in step 405, a response message is spread through the dedicated spreading code and transmitted through the reverse common channel. At this time, the mobile station transmits a response message to the base station with reference to the common power control channel. The ID of the common power control channel can be known from the DAM_ADDRESS received from the base station, and also sets the rate of the reverse common channel through the RATE_WORD.

Therefore, the reverse common channel transmitted from the mobile station spreads and transmits the transmission signal using the designated unique long code. Therefore, since the signal transmitted on the reverse common channel is spread by being transmitted by a specific spreading code designated by the base station, it has a similar characteristic to the signal transmitted on the dedicated channel.

7 is a flowchart illustrating a message procedure of a reverse common control channel of a mobile station performed by the same procedure as in FIG. 4.

Referring to FIG. 7, when a message is received through the forward common control channel in step 711, the mobile station checks whether the received message includes a dedicated channel assignment parameter in step 713. In this case, if the dedicated request message includes the dedicated channel assignment parameter, a response message is configured in step 715, and then, in step 717, the field related to the mobile station identifier is deleted. Fields related to the mobile station identifier are MSID_TYPE, MSID_LEN, MSID and the like as shown in Table 3. Thereafter, the mobile station requests the long code mask designated in step 719 to generate a spreading code of the dedicated reverse common control channel. In this case, the designated long code mask may be a long code mask by an electronic serial number (ESN), a public long code mask, or a dedicated long code contracted with a base station. After determining the dedicated long code mask to be used to generate the spreading code as described above, when the operation time is reached in step 721, the response message is transmitted through the dedicated reverse common control channel. However, if the message received in step 713 is not a message including a dedicated channel designation parameter, a spreading code of the reverse common control channel is generated using a long code of a common channel based on contention, and the response message is generated. Transmit through reverse common channel.

When the response message is transmitted as described above, the base station releases the reverse common control channel dedicated to the procedure shown in FIG. 3, and FIG. 6 is a flowchart illustrating the procedure as shown in FIG.

Referring to FIG. 6, when the base station receives a response message transmitted from the mobile station through the reverse common control channel in step 611, the base station processes the received message in step 613. Thereafter, it is checked whether the received message is a message received through the dedicated reverse common control channel in step 615. If the message is the dedicated reverse common control channel, the channel element set in the channel reservation process is released in step 619. The reservation time timer T_designated is released through steps 619 and 621.

However, if the response message transmitted from the mobile station is not received within the time set in the reservation time timer T-designated while performing the process of FIG. 6 (using the dedicated reverse common control channel), the base station determines that Release the reserved channel elements and timer T-designated to restore resources. This is to save resources by releasing dedicated channel assignment parameters assigned to non-responding mobile stations and allocating dedicated reverse common control channels to other mobile stations.

According to a second embodiment of the present invention, an operation of dedicating a common channel by a base station and a mobile station will be described.

8A illustrates a procedure of adding information for dedicating a reverse common channel in a link access layer of a base station.

Referring to FIG. 8A, the base station reserves the channel element of the base station as described above before dedicating the common channel in the link access layer Layer 2 in step 801. When the base station intends to allow the delegation of the message or user data traffic requesting reception from the message shown in Table 1 or the mobile station, a channel element, which is a reserved resource, is reserved in step 801. Disignated_Mode, request).

When the resource controller (RC) receives the channel element reservation request output from the layer 3, the RC transmits a signal to the physical layer to reserve a channel element existing in the physical layer in step 802. At this time, the operation time for notifying when the reservation of the channel element is started is informed together, and the operation time may be transmitted to the mobile station by a message or may be arbitrarily set in the base station system. (CE_Reserve. Request with action time). The action time that is set is set to an appropriate value in consideration of the time required for transmitting a message on the forward common channel and receiving a response message after the mobile station receives the message. The link access layer or signal layer Is added from In addition, the reservation time of the channel element should also be set. This time (T_designated) is used to prevent the situation that a waste of resources is caused by continuing to occupy the channel element even when a message is not received within the set time. It may be set in consideration of the transmission time of the message through the forward common channel, the processing time of the message of the mobile station and other time consumed (CE reserve. Request with action time).

The physical layer then informs RC of the reservation of the channel element in step 803. (CE_Reserve.Response). At this time, if the reservation of the channel element is impossible, an impossible signal is generated, and when the reservation is completed, a completion signal is generated. At this time, if reservation is impossible, timer value is not set. (CE reserved at specified action time for T_designated).

Process 804 is a process in which the signal layer receives a signal transmitted from the RC, and indicates that the RC delivers a response of the physical layer to the signal layer. (Designated_Mode.Response).

In this case, when the signal layer receives a non-reservation signal of a channel element, the signal layer is common through a message control status block (MCSB) to receive a response message or user traffic data of a message to be transmitted to a mobile station through a dedicated channel. Information indicating channel delegation is transmitted to the link access layer. When the link access control layer receives the L3 SDU and the message control status block (MCSB) together, it recognizes the processing method of the currently received message and adds the following fields to the message as described above for the purpose of dedicating the common channel. .

The link access layer sets the DESIGNATED_MODE field to '1', sets the address of the common power control channel to be referred to by the mobile station in the DAM_ADDRESS field, and sets information about the transmission rate of the set channel in the RATE_WORD field. In addition, if the operation time is added in the link access layer, the USE_TIME and ACTION_TIME fields are added. However, the operation time field may be added in the signal layer (Designated_Mode, DAM address, Rate_Word) setting on this message).

If the MCSB received with the L3 SDU has no instruction for dedicating the common channel, the link access layer sets DESIGNATED_MODE, which is an additional field for the dedication of the common channel, to '0', and includes the DAM_ADRESS and RATE_WORD fields. I never do that. At this time, the operation time information (USE_TIME and ACTION_TIME) is not added to the link access layer or the signal layer. This means that it has the same characteristics as a general conventional reverse channel.

The message configured as described above is transmitted to the mobile station through the forward common channel in step 805. In this case, the DESIGNATED_MODE set to '1' in the message transmitted through the forward common channel is a command for the mobile station to spread the reverse channel with a specific long code, and the long code used can use a unique code of the mobile station. (Message transmission on forward common channel).

FIG. 8B is similar to the operation of FIG. 8A but illustrates the operation of the base station when the CE reservation is performed in the link access control layer. Sending a command to set ACK_REQ to MCSB while sending SDU at L3 in process 810, and instructing CE reservation by sending Designated_Mode.Request to RC when commenting to set ACK_REQ through MCSB at link access control layer in process 811. do. In step 812, the RC checks the MAC state of the current mobile station and transmits the CE_Reserve.Request to the Physical. At this time, if the base station knows the ESN of the mobile station (eg, Suspended State), it designates an ESN based long code mask or a scheduled R-CCCH long code mask. In addition, the operation time may be set to synchronize with the time point at which the mobile station transmits a message. The operation time may use a value for transmission of a common channel or a value already transmitted as an (Access) Access Parameter Message. In step 813, the reservation of the CE is transmitted to the RC. In step 814, the link access control layer informs the link access control layer whether the common channel is set to be dedicated. If the dedicated channel is successfully set, the designed long code mask type is informed to the link access control layer. In step 806, the link access control layer sets and adds a field related to the dedication of the common channel, and transmits the message generated through the F-CCCH in step 807.

FIG. 9A illustrates a method of transmitting a reverse common channel information from a base station to a mobile station and processing a message when a response message or user data traffic is received from the mobile station through a dedicated reverse common channel.

Referring to FIG. 9A, in step 901, a message is received from a mobile station on a dedicated reverse common channel. If the reverse common channel is not dedicated, the base station is equivalent to receiving a message on an access channel of a conventional mobile communication system. (message reception on Designated Reverse common channel).

Then, in step 902, the signaling layer transmits a message requesting a response or a message requesting transmission of user traffic data, and when the response message or user traffic data is received, the deactivation of the reverse common channel is terminated. Notify the RC (Designated_Mode_Release.Request).

In step 903, the RC notifies the physical layer that the deactivation of the reverse common channel has ended. (CE_Release.Request). The physical layer then terminates the demodulation process for demodulating the channel spread with the long code of the particular mobile station, i.e., the only long code of the mobile station that transmits the information to the dedicated channel and releases the occupancy of the channel element. do. (CE releasing).

In step 904, the RC notifies the RC that the reservation of the channel element has been released. (CE_Release Response) Then, in step 905, the RC notifies the signal layer that the reservation of the channel element has been released. (Designated_Mode_Release.Response).

FIG. 9B illustrates a process of releasing a dedicated channel in the link access control layer unlike FIG. 9A. In step 910, a message is received through the reverse common channel. In step 911, after processing the ACK_SEQ of the message received in the link access control layer, it is determined whether it is a response of the message requesting a DAM (Designated Access Mode), and the requested received message. In the case of RC, DAM release is requested. In step 912, the RC requests the release of the channel element. In step 913, the RC informs the RC of the physical layer after the release of the CE. Negotiation 914 notifies the RC to the link access control layer that the DAM has been released.

FIG. 10 is a diagram illustrating a process of receiving a message having information for setting up a reverse dedicated channel and transmitting a response message thereto.

Referring to FIG. 10, step 1001 illustrates a process in which a mobile station receives a message of a base station transmitted on a forward common channel. (Message reception using forward common channel).

The message received by the mobile station in step 1002 then recognizes that the message currently received at the link access layer has a field to dedicate a reverse common channel. In step 1002, the MCSB displays information for informing the signal layer of the derivation of the reverse common channel recognized by the link access layer and transmits it to the signal layer together with the L2 PDU from which the field related to the link access layer of the received message is removed. Designated Mode indicator placed)

In step 1003, the signaling layer of the mobile station transmits an L3 SDU to the link access layer along with an MCSB containing information to dedicate a reverse common channel when transmitting a response message of a message received from a base station or transmitting user data traffic. (Designated Mode indicator placed)

The link access control layer analyzes the MCSB received with the L3 SDU and recognizes that the currently received message is transmitted through the reverse dedicated channel. Then, as shown in Table 3, the link access control layer does not add the ID related field of the mobile station. In step 1004, the link access control layer protocol data unit (PDU) and PDU control status block (PCSB) configured in the link access control layer are transmitted to the MAC layer using medium access control (MAC). The control layer PDU includes Excluding MSID related fields, and the PCSB includes a Designated Mode indicator placed on a dedicated reverse channel.

Upon receiving the link access control layer PDU and the PCSB through the process 1004, the MAC transmits a signal to spread and transmit a message to be transmitted currently using a unique long code of the mobile station to the physical layer in the process 1005. (Designated_Long_Code.Request).

In response to the command of the received signal, the physical layer spreads the reverse common channel using an ESN or a specific long code mask, that is, a designated long code mask, in step 1006 to respond to the mobile station. Or transmit user data traffic. The mobile station then transmits a response message or user data traffic to the base station with reference to the common power control channel. The ID of the common power control channel can be known from the DAM_ADDRESS received from the base station, and also sets the rate of the reverse common channel through the RATE_WORD. In addition, if the message received from the base station has an operation time, the mobile station transmits a response message or user data traffic to the base station at the set operation time. However, if the operating time of the channel element at the base station is set to an arbitrary value in the system, the mobile station does not know the operating time and transmits the message at any time.

Therefore, the reverse common channel transmitted from the mobile station spreads and transmits the transmission signal using the designated unique long code. In addition, since the signal transmitted on the reverse common channel is spread by being transmitted by a specific spreading code designated by the base station, it has a similar characteristic to the signal transmitted on the dedicated channel.

Finally, an operation of dedicating a common channel by a base station and a mobile station according to the third embodiment of the present invention will be described.

FIG. 11 illustrates a transmission operation of a base station for dedicating a common channel according to the third embodiment of the present invention.

The signal layer, which is Layer 3 of the base station, transmits information indicating that the current message generated while generating the L3 SDU in step 1100 may indicate a dedicated channel of the common channel to the LAC through the MCSB.

The LAC, which is the transmission control layer, processes the MCSB received in step 1101 to determine whether the L3 SDU currently received is a message requesting the dedication of a common channel, and then adds an L2 PDU added with an L3 SDU field added to the LAC. It generates and sends information indicating that the PCSB is a message requesting the dedication of the common channel to the MAC. At this time, the LAC indicates that the message requests a response message from the mobile station by setting the ACK_REQ field of the message to '1'.

In step 1102, when the MAC decodes the PCSB to determine that the message is required to dedicate the common channel, the MAC transmits a Designated_Mode.Request command to the RC to reserve a channel element of the physical layer.

The RC transmits a CE_Reserve.Request to the physical layer in step 1103. At this time, the RC sets an operation time to set the synchronization indicating the start point of the dedication of the common channel between the base station and the mobile station. The operation time may be arbitrarily set between the base station and the mobile section, and may be transmitted from the base station to the mobile station through a message. It also notifies the type of long code mask to be used by the mobile station when the common channel is dedicated.

The physical layer transmits a reservation state of a channel element to the RC in step 1104.

The RC transmits to the MAC whether the channel element of the physical layer has been successfully reserved in step 1105 and notifies the long code mask to be used by the mobile station when the common channel is dedicated.

In step 1106, after confirming that the channel element for the dedication of the common channel is successfully reserved from the RC, the MAC creates information necessary for the dedication of the common channel (DESIGNATED_MODE, DAM_ADDRESS and RATE_WORD) and adds the message to the L2 PDU. To exit.

In step 1107, the base station transmits a message containing the dedicated information of the common channel to the mobile station through the F-CCCH, which is a forward common channel.

12 illustrates a reception operation of a base station when the common channel is dedicated.

The base station receives a response message to the message sent by the base station through the R-CCCH, which is a common channel designated as the dedicated channel in step 1201.

The MAC confirms that the message currently received in step 1202 is a message received through the dedication of the common channel, configures L2 PDU + PCSB, and transmits it to the LAC. The LAC transmits L3 SDU + MCSB to the signal layer. The MAC also transmits Designated_Mode_Release.Reqeust to release the common channel from the base station to the RC.

The RC transmits CE_Release.Request to release the channel element to the channel element of the physical layer in step 1203.

The physical layer releases the channel element in step 1204 and informs the RC that the channel element has been released.

In step 1205, the RC notifies the MAC of the release of the channel element, thereby releasing all resources set for the dedicate process of the common channel.

FIG. 13 illustrates a reverse common channel processing procedure of a mobile station when common channel is dedicated.

The MAC of the mobile station receives the message from the base station in step 1300 and determines whether the currently received message is a message for setting up a common channel.

The MAC, after confirming that the message currently received in step 1301 is a message for setting up the dedication of the common channel, requests the switch to the long code mask to be used for the dedication of the common channel to the physical layer. In addition, the L2 PDU and the PCSB containing information indicating the dedication of the common channel are also transmitted to the LAC layer.

The LAC analyzes the PCSB in step 1302 and then transmits the L3 SDU and the MCSB to the signal layer L3. At this time, the MCSB also records information indicating the dedication of the common channel.

The signal layer transmits the MCSB to the LAC together with the L3 SDU in step 1303.

The LAC layer transmits the PCSB to the MAC together with the L2 PDU in step 1304.

The MAC configures the L2 PDU received from the LAC as a complete message in step 1305 and transmits the complete message to the physical layer.

The physical layer transmits the currently received message through the R-CCCH using the long code mask indicated for the dedication of the common channel in step 1306. At this time, the mobile station starts transmitting the message at the time agreed with the base station and performs power control of the message transmitted by using the common power control channel allocated from the base station.

As described above, the present invention provides a scheme for dedicating a reverse common channel of a code division multiple access mobile communication system and an interface between a communication device and a protocol layer, and a base station indicates a spreading code to dedicate a reverse common channel. It consists of a mobile station that transmits control messages including long code information, channel rate and common power control channel information through the forward common channel, and spreads and transmits user data using the unique long code in response to control messages. In the process of transmitting a message on the reverse common channel, it is possible to guarantee faster response time, increase transmission success rate, and reduce effects such as interference between channels caused by retransmission. In addition, it is possible to reduce the number of fields added in the LAC layer, thereby reducing the error that may occur when transmitting a message.

Claims (18)

A method for transmitting a message by dedicating a reverse common channel by a base station of a code division multiple access communication system, Designating a reverse common channel for receiving the response message as a dedicated channel when the base station generates a message to receive a response through a reverse common channel; The base station designating the reverse common channel as a dedicated channel, generating a dedicated channel designation parameter including information including a dedicated indication and an operation time of the reverse common channel, and transmitting the same along with the message; The base station dedicates the reverse common channel by the dedicated indication at the operation time and releases the deregulation of the reverse common channel after receiving a response message received through the dedicated reverse common channel. Method for transmitting a reverse common channel dedicated message, characterized in that consisting of a process. The base station of claim 1, wherein the dedicated channel designation parameter further comprises an address of a common power control channel and data rate parameters of a reverse common channel for controlling transmission power of the reverse channel. How to send a message. 3. The method of claim 2, wherein the base station is a channel spreading code using a dedicated channel spreading code of the directional common channel using an ESN mask of the mobile station. A method for releasing a dedicated reverse common channel for a base station in a code division multiple access communication system, When a message that needs to be answered through a common channel is generated, a process of setting a reservation and reservation time for a specific reverse common channel as a dedicated channel; Generating a dedicated channel designation parameter including a dedicated indication of a reverse common channel for receiving the response message on the reserved reverse common channel and information including the operation time and transmitting the same with the message; If the response message received through the dedicated reverse common channel is received within the reservation time, and if the response message is received within the reservation time or if the response message is not received such that the reservation time has elapsed. And releasing the dedicated assignment of the reverse common channel to the base station. The reverse common channel of claim 4, wherein the dedicated channel designation parameter further comprises an address of a common power control channel for controlling transmission power of the reverse channel and data rate parameters of a reverse common channel. How to turn off. 6. The method of claim 5, wherein the dedicated channel spreading code of the reverse common channel is a channel spreading code using an ESN mask of the mobile station. A method for transmitting a message by designating a reverse common channel as a dedicated channel of a mobile station in a code division multiple access communication system, the method comprising: Receiving a message transmitted through the forward common channel; Analyzes the received forward common channel message and reverse common when the message includes dedicated channel designation parameters including a dedicated indication for dedicating a reverse common channel and a time to operate as a dedicated channel. Specifying a dedicated mode of the channel and generating a response message of the received message; The dedicated channel spreading code of the mobile station is assigned to the reverse common channel by the dedicated indication and designated as a dedicated channel. The response message generated during the operation time is transmitted through the reverse common channel, A method for releasing delegation, wherein a mobile station designates a reverse common channel as a dedicate channel and transmits a message. 8. The method of claim 7, wherein the dedicated dedicated channel designation parameter further comprises an address of a common power control channel and a data rate parameter of a reverse common channel for controlling the transmit power of the reverse channel, wherein the response message is transmitted. And a transmission power is controlled according to the designated common power control channel and is transmitted according to the designated transmission rate. 6. The method of claim 5, wherein the dedicated channel spreading code of the reverse common channel of the mobile station is a channel spreading code using an ESN mask of the mobile station. A method for establishing a dedicated channel between a base station and a mobile station in a code division multiple access communication system, Dedicated channel including a dedicated indication including information designating a dedicated channel over a common channel communicated by other mobile stations from the base station to the mobile station, the address of the common power control channel, the transmission rate and the operation time of the dedicated channel. Sending the specified parameters with a message, The mobile station receives the message with the dedicated channel assignment parameters and dedicates the reverse common channel by the dedicated indication in the dedicated channel assignment parameters at the operating time to address the common power control channel. And transmitting the response message of the message to the base station with the power determined by the transmission rate, and then deassigning the reverse common channel. How to set up. An apparatus in which a base station of a code division multiple access communication system is dedicated to a reverse common channel, Generating dedicated channel specification parameters including a dedicated indication for dedicating a reverse common channel and a time to operate as a dedicated channel, and generating a forward common channel message including the generated dedicated channel specification parameter; With a message generator, A forward common channel transmitter for transmitting a message of the forward common channel; A reverse common channel receiver reserved when the forward common channel message is transmitted and assigned to the dedicated channel by the dedicated channel spreading code of the mobile station for the reserved time and receiving a response from the mobile station, and then the dedicated release is released. A message communication apparatus for a dedicated common channel of a code division multiple access communication system. An apparatus for transmitting a message in which a mobile station of a code division multiple access communication system designates a reverse common channel as a dedicated channel, A forward common channel receiver for receiving a message transmitted on the forward common channel; Analyzes the received forward common channel message and reverse common when the message includes dedicated channel designation parameters including a dedicated indication for dedicating a reverse common channel and a time to operate as a dedicated channel. A message analyzer for specifying a dedicated mode of the channel and generating a response message for the received message; The code division consists of a reverse common channel transmitter which dedicates the dedicated channel spreading code of the corresponding mobile station according to the dedicate display when the dedicated mode is specified, and releases the dedicate after transmitting the response message generated in the operation time. Dedicated common channel message communication device in a multiple access communication system. Reserving a reverse common channel available in the physical layer as a dedicated channel in response to a dedicated mode request from the signal layer of the base station; After the reservation of the dedicated channel, dedicated channel specification parameters including a dedicated indication including parameters specifying the dedicated channel to data to be sent from the signal layer and an operation time of the dedicated channel. The process of forming a message, Transmitting the formed message to a forward common channel through a physical layer; Deactivating the reverse common channel after receiving a response message received through the dedicated reverse common channel, by dedicating the reverse common channel by the dedicated channel indication in the operation time. And designating a reverse common channel of the base station as a dedicated channel. A method of designating a reverse common channel of a terminal receiving a message including a dedicated channel designation parameter including a dedicated indication and an operation time for designating a reverse common channel as a dedicated channel as a dedicated channel, , Transmitting, by the physical layer, the message received on the forward common channel to the signal layer; The signal layer generates a response message according to the message, marks the dedicated message in the generated response message, and designates a spreading code and an operation time to use the reverse common channel as the dedicated channel for the physical layer. The required process, The physical layer using the spreading code of the dedicated channel to transmit the response message by dedicating the reverse common channel at the designated operation time, and then deassigning the reverse common channel. . Reserving a reverse common channel available in the physical layer as a dedicated channel in response to a dedicated mode request from the signal layer of the base station; After the reservation of the dedicated channel, dedicated channel specification parameters including data to be sent from the signal layer and parameters indicating the dedicated channel and dedicated operation channel and operating time of the dedicated channel. The process of providing, Forming the data from the signal layer and the dedicated channel designation parameter as a message in a link access control layer; Transmitting the formed message to a forward common channel through a physical layer; Delegating the reverse common channel at the operation time, and deactivating the reverse common channel after receiving a response message through the dedicated reverse common channel. How to designate a channel as a dedicated channel. A method of designating a reverse common channel of a terminal receiving a message including a dedicated channel designation parameter including a dedicated indication and an operation time for designating a reverse common channel as a dedicated channel as a dedicated channel, , Sending, by the physical layer, the message received on a forward common channel to a link access control layer; The link access control layer makes the dedicated message on the received message and sends it to the signal layer, and the signal layer generates a response message according to the message and marks the dedicated message on the generated response message. Sending to the access control layer, Requesting, by the link access control layer, designation of a spreading code and an operation time to use the reverse common channel as a dedicated channel to the physical layer; The physical layer using the spreading code of the dedicated channel to transmit the response message by dedicating the reverse common channel at the designated operation time, and then deassigning the reverse common channel. . Reserving a reverse common channel available in the physical layer as a dedicated channel in response to a dedicated mode request from the signal layer of the base station; After the reservation of the dedicated channel, dedicated channel specification parameters including data to be sent from the signal layer and parameters indicating the dedicated channel and dedicated operation channel and operating time of the dedicated channel. The process of providing, Forming the data from the signal layer and the dedicated channel designation parameter as a message in a media access control layer; Transmitting a message formed in the medium access control layer to a forward common channel through a physical layer; And deactivating the reverse common channel after receiving the response message by dedicating the reverse common channel at the operation time. A method of designating a reverse common channel of a terminal receiving a message including a dedicated channel designation parameter including a dedicated indication and an operation time for designating a reverse common channel as a dedicated channel as a dedicated channel, , Sending, by the physical layer, the message received on a forward common channel to a media access control layer; The medium access control layer sends the dedicated message to the received message and sends the message to the signal layer, and the signal layer generates a response message according to the message and the dedicated message is displayed on the generated response message. Sending to the access control layer, Requesting, by the medium access control layer, designation of a spreading code and an operation time in order to use the reverse common channel as a dedicated channel to the physical layer; The physical layer using the spreading code of the dedicated channel to transmit the response message by dedicating the reverse common channel at the designated operation time, and then deassigning the reverse common channel. .