KR100326324B1 - Method for controlling gated transmission of dedicated channel signal in w-cdma communication system - Google Patents

Abstract

In a wideband code division multiple access communication system in which a frame consists of 15 slots and each slot multiplexes a signal of a dedicated control channel consisting of TFCI, TPC and pilot, and a dedicated data channel for transmitting packet data. The intermittent transmission instruction including the intermittent rate for interrupting the signal of the dedicated control channel and the intermittent transmission start time may be performed when the intermittent transmission method of the dedicated control channel of the base station has no data transmitted through the dedicated data channel for a preset time. Generating a message and transmitting the message to the mobile station; and intermittently transmitting the signal of the dedicated control channel at the intermittent transmission start time included in the intermittent transmission instruction message.

Description

Method for controlling intermittent transmission of dedicated channel signal in wideband code division multiple access communication system {METHOD FOR CONTROLLING GATED TRANSMISSION OF DEDICATED CHANNEL SIGNAL IN W-CDMA COMMUNICATION SYSTEM}

The present invention relates to a method for controlling intermittent transmission between a base station and a mobile station in a wideband code division multiple access (W-CDMA) communication system. It is about a method.

In the conventional CDMA mobile communication system, which mainly focuses on the transmission of voice and circuit data, data is transmitted through a dedicated channel, and a dedicated channel is allocated whenever a data is to be transmitted. The method to turn it off was used. However, if the conventional method is used to provide other services such as packet data services other than voice services, frequent resource allocation and release procedures have to be performed, resulting in a large number of delay factors such as reconnection delay time. Can't provide quality service. In the packet data service, data transmission is often intermittent. Therefore, there is a period in which data is not transmitted until some packet data is transmitted and then next packet data is transmitted. When a conventional channel control method is used to service packet data having the above characteristics, the channel must be released or the channel is maintained in the interval in which the data transmission is suspended. At this time, if the channel is released, the channel is re-assigned and used, which takes a lot of time, resulting in increased power consumption. Also, if the channel is maintained, the channel is wasted.

Therefore, in order to provide other services such as packet data services other than voice services, channels must be allocated in a manner different from the conventional scheme. FIG. 1 is a diagram illustrating a state of a user equipment (UE) defined according to a radio resource allocated during data transmission in a wideband code division multiple access communication system.

Referring to FIG. 1, a Cell_DCH state in which a dedicated channel is allocated for data transmission, a Cell_FACH state in which only a small amount of data is transmitted using a common channel, and a data position are not allowed. Cell_PCH status or URA_PCH status to register in URA (UTRAN Registration Area). As a method of allocating a dedicated channel to the UE in the Cell_DCH state, a method of continuously assigning a dedicated channel until a release procedure is performed or a method of allocating a channel to transmit data for a predetermined time or a predetermined amount is used. do. If the conventional technology using the above-mentioned channel allocation method supports a service that intermittently sends bursted data, the dedicated channel is allowed to continue to be used until all data is transmitted or after the bursted data is transmitted. It will be supported by releasing the private channel and sending a message requesting the allocation of the dedicated channel again using the shared channel. However, if the dedicated channel is allowed to be used continuously, the uplink and downlink dedicated control channels are continuously maintained to maintain the channel even though no data is actually transmitted to the dedicated physical data channel (DPDCH). (DPCCH: Dedicated Physical Control Channel) should be transmitted, which causes the channel to be wasted by increasing the backward and forward interference, and the mobile station consumes unnecessary power due to the continuous transmission of the backward dedicated control channel. There is this. In addition, when a method of allocating a dedicated channel every time data to be transmitted is used, there is a problem in that a stable service cannot be provided because the time taken to reassign the channel is variable.

2A, 2B, 3A, and 3B are transmission signal configuration diagrams of a conventional base station (UTRAN: UMTS Terrestrial Radio Access Network) and a mobile station (UE).

FIG. 2A is a block diagram illustrating a transmission signal of a mobile station when there is no data to be transmitted in the reverse direction while transmitting data in the reverse direction. FIG. . The reference numeral 200 of FIG. 2A and the reference numeral 250 of FIG. 2B indicate a time point at which transmission of the dedicated data channel (DPDCH) is stopped when there is no data to be transmitted in the reverse direction or the forward direction according to the conventional scheme, and the reverse direction and the forward direction thereafter. In order not to lose synchronization of the link, only the dedicated control channel (DPCCH) is continuously transmitted. Continuous transmission of the dedicated control channel is advantageous in that data can be safely transmitted using the dedicated data channel without delay when data to be transmitted in the reverse or forward direction occurs. This can be confirmed through FIGS. 3A and 3B.

FIG. 3A is a transmission signal diagram of a mobile station in which data to be transmitted in the reverse direction occurs when only the reverse dedicated control channel is being transmitted and starts transmitting data to the dedicated data channel. FIG. 3B is a state in which only the forward dedicated control channel is transmitted. A transmission signal diagram of a base station in which data to be transmitted in a forward direction is generated and data is transmitted on a dedicated data channel. The reference numeral 300 of FIG. 3A and the reference numeral 350 of FIG. 3B represent a time point at which data is retransmitted to the dedicated data channel, and is immediately following the time point at which data to be transmitted is generated. However, as described above, continuous dedicated control channel transmission in the reverse and forward directions increases the interference of the reverse and forward links, thereby reducing channel capacity in the reverse and forward directions and causing power consumption of the mobile station.

Therefore, in order to support stable service while efficiently using the channel by minimizing the increase of interference due to the continuous transmission of the reverse dedicated control channel, the power consumption of the mobile station, and the transmission of the forward dedicated control channel, the dedicated control channel may be used. It is desirable to perform Gated Transmission. Here, the intermittent transmission refers to a method of intermittently transmitting without continuously transmitting a signal of a dedicated control channel.

Accordingly, an object of the present invention is to provide a method for intermittently transmitting a signal of a dedicated control channel when data transmission is not performed for a predetermined time in a state where a dedicated channel is allocated for data transmission in a mobile communication system.

Another object of the present invention is to provide a method for intermittently transmitting a signal of a dedicated control channel of a reverse link by requesting an intermittent transmission from a base station when there is no data to be transmitted in the reverse direction for a predetermined time in a mobile communication system.

Another object of the present invention is to provide a method for intermittently transmitting a signal of a dedicated control channel of a forward link by controlling a mobile station when there is no data to be transmitted in a forward direction for a predetermined time in a mobile communication system.

It is still another object of the present invention to provide a method in which a base station intermittently receives a signal of a dedicated control channel of a reverse link intermittently transmitted from a mobile station in a mobile communication system.

It is still another object of the present invention to provide a method for intermittently receiving a signal of a dedicated control channel of a forward link intermittently transmitted from a base station by a mobile station in a mobile communication system.

Another object of the present invention is to provide a method for transmitting data in reverse direction when data is to be transmitted while the mobile station performs intermittent transmission in a mobile communication system.

It is still another object of the present invention to provide a method for transmitting data in a forward direction when data to be transmitted on a forward link is performed by a base station during intermittent transmission in a mobile communication system.

Transmitting a message indicating that a condition for performing intermittent transmission is satisfied to achieve the above object, transmitting a response message by a counterpart receiving the message, transmitting a message instructing intermittent transmission, Intermittent transmission is performed according to the intermittent transmission rate (Gating rate), the intermittent transmission start time (Gating start time) included in the message, and the amount of power to be increased when the data is transmitted during the intermittent transmission and the intermittent transmission pattern. It is characterized by consisting of a process.

1 is a schematic state transition diagram of a wideband code division multiple access communication system for packet services.

Figure 2a is a signal transmission and reception between the base station and the mobile station when there is no data to be transmitted in the reverse direction according to the conventional scheme.

Fig. 2B is a transmission and reception signal diagram between a base station and a mobile station when there is no data to be transmitted in the forward direction according to the conventional scheme.

3A is a transmission and reception signal diagram between a base station and a mobile station in which data to be transmitted in the reverse direction occurs in the absence of data to be transmitted in a reverse dedicated data channel according to a conventional scheme, and then transmits the dedicated data channel again.

3B is a transmission and reception signal diagram between a base station and a mobile station in which data to be transmitted in a forward direction occurs in the absence of data to be transmitted to a forward dedicated data channel according to a conventional method, and then transmits a dedicated data channel again.

4A is a flowchart of processing in a mobile station when there is no data to be transmitted in the reverse direction and intermittent transmission is necessary according to an embodiment of the present invention.

4B is a flowchart of processing at a base station when intermittent transmission is necessary because there is no data to be transmitted in a forward direction according to an embodiment of the present invention.

5A is a flowchart of a process of a mobile station when data to be transmitted in reverse direction occurs during intermittent transmission according to an embodiment of the present invention;

5B is a flowchart illustrating processing of a base station when data to be transmitted in a forward direction occurs during intermittent transmission according to an embodiment of the present invention.

6 is an example of a dividing channel structure and a forward intermittent transmission pattern.

7A is a block diagram of a base station and a mobile station in case of performing intermittent transmission while transmitting data in a reverse direction according to an embodiment of the present invention.

7B is a block diagram of a base station and a mobile station in case of performing intermittent transmission while transmitting data in a forward direction according to an exemplary embodiment of the present invention.

8A is a block diagram of a base station and a mobile station when data to be transmitted in reverse direction occurs during intermittent transmission of a dedicated control channel according to an embodiment of the present invention.

8B is a block diagram illustrating transmission and reception signals between a base station and a mobile station when data to be transmitted in a forward direction occurs during intermittent transmission of a dedicated control channel according to an exemplary embodiment of the present invention.

9 is a diagram illustrating a capability negotiation process of a mobile station.

10 is a diagram illustrating a form of an intermittent transmission message according to an embodiment of the present invention.

According to the present invention, in a mobile communication system of a wideband code division multiple access (W-CDMA) system, when a data is not transmitted through a dedicated data channel for a predetermined time while a dedicated channel is allocated and data is transmitted, A method of performing intermittent transmission. That is, the present invention relates to a procedure for enabling intermittent transmission of a dedicated control channel in order to minimize power consumption and channel waste of a mobile station due to transmission of a continuous dedicated control channel in the absence of data to be transmitted to the dedicated data channel. By intermittently transmitting signals of a dedicated control channel in a wideband code division multiple access communication system as described above, the synchronization of physical channels can be maintained while saving transmission power, and a closed control loop is also provided. It is possible.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

In the following description, specific details such as intermittent transmission rate, intermittent transmission pattern, slot length, power control size, etc. are shown to provide a more general understanding of the present invention. It will be apparent to one of ordinary skill in the art that the present invention may be readily practiced without these specific details and also by their modifications.

In the description of the present specification, the components that perform the same function are given the same reference numerals, and the description of the components previously described in the description of each drawing is omitted except where necessary. In the present specification, the length of the frame is 10 msec and the length of the power control group is approximately 0.667 msec because there are 15 power control groups in one frame. However, the above values are merely selected values for the purpose of explanation of the present invention. no.

The term 'gated transmission' used in the present invention refers to a method of intermittently transmitting a signal of a dedicated control channel without continuously transmitting the signal.

In the embodiment of the present invention, an example is described in which the base station determines intermittent parameters at the request of the mobile station UE or the base station UTRAN requires the capability of the mobile station to determine the intermittent parameters. However, in addition to the method of determining the interruption parameters by negotiation between the base station and the mobile station as described above, the interruption parameters between the base station and the terminal may be set and used in advance when setting up a call. In the embodiment of the present invention, the gating indicator, the gating rate, the gated transmission start time, the gated transmission pattern, and the dedicated data channel are used as the interruption parameters. Although the size of power to be increased when data is transmitted is described as an example, other parameters may be additionally used in addition to the above parameters if necessary.

A flowchart for intermittent transmission control according to an embodiment of the present invention is as follows.

FIG. 4A is a diagram illustrating a procedure when the mobile station performs intermittent transmission of a signal of a reverse dedicated channel because there is no data to be transmitted in the reverse direction according to an embodiment of the present invention.

Referring to FIG. 4A, in step 400, the mobile station transmits control data and packet data through the reverse dedicated control channel and the dedicated data channel. After transmitting the control data and the packet data through the dedicated channels as described above, it is checked whether there is data to be transmitted through the reverse dedicated data channel in step 401. If there is data to be transmitted, the process returns to step 400 to perform the data transmission operation. To perform. However, if there is no data to transmit in step 401, the process proceeds to step 402 and transmits only control data to be transmitted to the dedicated control channel.

Thereafter, in step 403, the time when data is not transmitted through the dedicated data channel is checked. The reason for checking the time for not transmitting the reverse dedicated data channel in step 403 is to prevent the intermittent transmission if there is no data for a short time. In this case, if the dedicated data channel is not transmitted for a predetermined time in step 403, it is checked whether there is data received in the forward dedicated data channel in step 404. The reason for the above is that in order to perform intermittent transmission of the dedicated control channel, there should be no transmission on the dedicated data channel in both the reverse direction and the forward direction. If there is data received at this time, since the base station continues to transmit data, the mobile station does not satisfy the condition for performing the intermittent transmission. Therefore, the mobile station returns to step 401 and checks whether data to be transmitted in the reverse direction has occurred. If data to be transmitted in the reverse direction is generated in step 401, the process is performed again from step 400 in which both the reverse dedicated data channel and the dedicated control channel are transmitted. However, since the condition for performing intermittent transmission in the reverse direction is satisfied in step 403, the mobile station informs the base station of this fact without performing step 404 and checks whether the base station has data to transmit in the forward direction and performs intermittent transmission. A method may be used to determine whether or not.

Reference numeral 405 denotes a procedure for checking whether data to be transmitted on the reverse dedicated data channel has occurred while checking whether data is received on the forward dedicated data channel. If it is checked in step 405 that data to be transmitted in the reverse direction has occurred, the process returns to step 400 in which both the reverse dedicated data channel and the dedicated control channel are transmitted. However, in step 405, if there is no data to be transmitted in the reverse direction, in step 406, a message indicating that the condition for performing intermittent transmission is satisfied is generated and transmitted. The message generated in step 406 is a message that can be used by the mobile station to inform the base station that the intermittent transmission condition is satisfied, such as a MEASUREMENT REPORT defined in UMTS.

After transmitting the message indicating that the intermittent transmission condition is satisfied, the mobile station waits for reception of the response message of the base station in step 407. The response message of the base station received in step 407 includes information such as intermittent transmission rate, intermittent transmission time, power strength and intermittent transmission pattern to be increased when transmitting data through the dedicated data channel to be performed by the mobile station. It must be included. When the base station generates the response message, whether there is data to be transmitted in the forward direction, and if the mobile station's intermittent transmission capability is known through the procedure of informing the base station of the capability of the mobile station as shown in FIG. This will determine the parameters associated with the interrupted transmission. In addition, the base station may limit the data rate that can be used during intermittent transmission, information related to this may be included in the response message. As the response message, a message such as TRANSPORT CHANNEL RECONFIGURATION or PHYSICAL CHANNEL RECONFIGURATION defined in the current UMTS may be used, and a message field as defined in FIG. 10 should be added to the message.

FIG. 10 is a diagram illustrating the configuration of an intermittent transmission message transmitted from a base station, and includes parameters for intermittent transmission of the dedicated control channel.

Referring to FIG. 10, a gating indicator of reference numeral 1000 may be configured by 1 bit, and the role of this field may indicate whether there is information related to intermittent transmission. A gating rate bit of reference numeral 1010 is a field used to specify an intermittent transmission rate, and reference numeral 1020 is a field specifying a time when intermittent transmission should be performed, and expresses the execution start time in some form. The number of bits varies depending on the number of bits. Reference numeral 1030 denotes a field for indicating an intermittent transmission pattern, and is a field used to inform whether the intermittent transmission pattern should be periodically or randomly made or the forward intermittent transmission pattern to be used. Reference numeral 1040 denotes a field indicating power size to be increased in order to increase power of a dedicated data channel to compensate for loss of power control due to intermittent transmission when data is transmitted during intermittent transmission. .

6 is a diagram illustrating an example of intermittent transmission of a dedicated control channel according to an embodiment of the present invention.

Referring to FIG. 6, reference numeral 600 shows a forward channel structure, and reference numerals 650 and 660 show examples of an intermittent transmission pattern of a forward dedicated control channel. Intermittent transmission of this pattern is possible because the dedicated control channel is distributed in the forward channel structure 600 of FIG. The 650 is an example in which only a Transport Format Combination Indicator (TFCI) bit is not transmitted among control channels in a slot. Pilot bits are transmitted in all slots, and TPC (Transmit Power Control) bits are not always transmitted. It is transmitted corresponding to the transmission rate of the control channel. An example of 650 is an example where intermittent transmission is performed at a 1/2 interruption rate in the reverse direction. The example of 660 is an example of not transmitting an entire slot, which is also an example of intermittent transmission at a 1/2 interruption rate. Since the start time of the intermittent transmission must be correctly synchronized between the mobile station and the base station, it must wait until the intermittent transmission start time indicated in the response message as shown in step 408 of FIG. 4A. If the response message received in step 407 of FIG. 4A has a restriction on radio resources to be used during intermittent transmission, only the allowed radio resources should be used while performing intermittent transmission. In addition, intermittent intermittent transmission may be applied to intermittent intermittent transmission, which is applied only to one dedicated control channel of a reverse or forward dedicated control channel depending on whether intermittent transmission is supported by a mobile station and intermittent transmission support by a base station.

7A is a block diagram of a base station and a mobile station in a case where intermittent transmission is performed because there is no data transmission on a dedicated data channel for a predetermined time while transmitting data in a reverse direction according to an exemplary embodiment of the present invention. FIG. 7A is a signal diagram of a mobile station when a message indicating that an intermittent transmission execution condition is satisfied is not retransmitted in step 407 of FIG. 4A.

In FIG. 7A, the time point at which transmission of the dedicated data channel is stopped will be a frame for transmitting the last data of reference numeral 700, and 710 corresponds to a time when the dedicated data channel identified in reference numeral 403 of FIG. 4A is not used. do. A reference numeral 720 of FIG. 7A is a time including a time for transmitting a message indicating that the condition for performing intermittent transmission is satisfied, a time for receiving a response message, and a wait time for starting the intermittent transmission included in the response message. Reference numeral 730 will also vary depending on the value specified in the response message received at 720. In FIG. 7A, an example of operating at a 1/3 interruption rate is assumed. The interruption rate specified by the base station can be 1/3, 1/5, etc.

4B is a flowchart illustrating a case where intermittent transmission is performed because there is no data to be transmitted in the forward direction according to an embodiment of the present invention.

Referring to FIG. 4B, the base station transmits control data and packet data through a forward dedicated control channel and a dedicated data channel in step 450. After transmitting data through the dedicated channels, the base station checks whether there is data to be transmitted through the forward dedicated channel in step 451. If there is no data to transmit through the forward dedicated channels, the base station transmits only the dedicated control channel in step 452. do. In this case, when data is transmitted only through the forward dedicated control channel, the base station checks the time for not transmitting packet data through the dedicated data channel in step 453. If the transmission operation is not performed for a predetermined time through the dedicated data channel in step 453, the flow proceeds to step 454 to check whether there is data received through the reverse dedicated data channel. In this case, the reason for checking the presence of reverse data transmission in step 454 is the same as the reason for performing step 404 of FIG. 4A. If there is data received in the reverse dedicated data channel in step 454 of FIG. 4B, since the mobile station continues to transmit data, whether data to be transmitted to the forward dedicated data channel has been generated while continuing to receive the reverse dedicated data channel. It should be checked continuously.

However, if there is no data received in the reverse dedicated data channel in step 454, the condition for intermittent transmission is satisfied. In step 455, it is checked whether data to be transmitted in the forward direction has occurred. If there is no data to be transmitted in step 455, in step 456 and step 457, a message indicating an intermittent transmission is generated and transmitted. Among the messages defined in UMTS, TRANSPORT CHANNEL RECONFIGURATION or PHYSICAL CHANNEL RECONFIGURATION may be used as a message indicating such intermittent transmission, and the fields defined in FIG. 10 should be added to the message. However, if data to be transmitted in the forward direction occurs in step 455, step 450 is performed to transmit data and user data to the dedicated data channel and the dedicated control channel.

Since it is the base station that controls the intermittent transmission as described above, the intermittent transmission rate, the intermittent transmission time, the intermittent transmission pattern, and the intermittent transmission necessary for the intermittent transmission in step 456 before the message indicating the intermittent transmission is transmitted in step 457. If the data to be transmitted is generated, the power of the dedicated data channel to be increased is decided. Subsequently, the intermittent transmission instruction message sent in step 457 is transmitted. Information fields to be included in the above messages are shown in FIG. 10.

In step 456 of FIG. 4B, if the base station receives information on the intermittent transmission from the mobile station in the current wireless situation and the procedure of FIG. 9, the base station determines the appropriate value in consideration of the information. When the response message is not received in step 458, a method of retransmitting the intermittent transmission instruction message is used. However, it is not necessary to use this method. If you have received information from you, you can do it based on this information or use other methods.

Intermittent transmission is performed from step 459 of FIG. 4B, but the base station performs intermittent transmission. If it is determined that the dedicated data channel can be maintained even though the intermittent transmission rate is reduced, the intermittent transmission is performed to the mobile station. You can order to modify it. Further, even when it is determined that the dedicated data channel is difficult to maintain at the current intermittent transmission rate, the intermittent transmission can be commanded to be corrected. The message instructing the intermittent transmission to be modified should also include information on when to start the modified intermittent transmission. From step 408 of FIG. 4A, the mobile station performs intermittent transmission. In this state, when the mobile station receives a message from the base station instructing to modify the intermittent transmission, from the time at which the intermittent transmission included in the message should be modified You must perform a modified intermittent transmission.

FIG. 7B is a block diagram of a transmission / reception signal of a base station when intermittent transmission is performed while there is no data to be transmitted in the forward direction while transmitting data in the forward direction according to an embodiment of the present invention. In FIG. 7B, reference numeral 760 is a corresponding time used to perform step 453 of FIG. 4B, and the time of reference numeral 770 is specified in a message indicating an intermittent transmission sent in step 457 of FIG. 4B. It's time. The time of reference numeral 780 of FIG. 7B is determined by the value specified in the message sent in step 457 of FIG. 4B, and FIG. 7B is an example of the case where it is transmitted at 1/3 rate.

5A is a flowchart of processing in a mobile station when data to be transmitted in the reverse direction occurs during intermittent transmission of the reverse dedicated control channel according to an embodiment of the present invention.

In step 500 of FIG. 5A, an intermittent transmission operation of the dedicated control channel is performed. When data to be transmitted is generated while performing the intermittent transmission, a method of increasing power of a dedicated data channel may be used to compensate for a problem that may occur due to a decrease in a power control cycle. In this case, the data that can be transmitted during the intermittent transmission is a small amount of traffic data such that the interference caused by the signaling data or the increased power is not greater than the capacity increase effect obtained by the intermittent transmission. Accordingly, in step 502 of FIG. 5A, whether data to be transmitted once is signaling data or traffic data is distinguished, and in case of signaling data, transmission is always performed in step 503. That is, since the signaling data is small, the signaling data is transmitted through the dedicated data channel even when the dedicated control channel is in the intermittent transmission state. If the data to be transmitted is traffic data, it is determined whether the amount of data is a small amount in step 504, and if it is a small amount, the data is transmitted in the intermittent transmission state in step 505. That is, even when a small amount of traffic data is generated during the intermittent transmission of the dedicated control channel, the small amount of traffic data is transmitted in the intermittent transmission in the same manner as the signaling data transmission method.

However, if the amount of data to be transmitted is not small, the procedure of step 506 or less should be performed. In step 506, the mobile station generates and transmits a message indicating that the intermittent transmission stop condition is satisfied. In step 507, a retransmission method is used as a processing procedure when the base station does not receive a response. However, another method may be used. The response message received from the base station in step 507 should include information on the radio resource to be used in the future and information on when to use it. The mobile station starts to transmit data on the dedicated data channel at the time specified in the response message. In addition, when data is transmitted during the intermittent transmission as in steps 503 and 505, the method for maintaining the intermittent transmission may be used as the dedicated control channel, or dedicated control to increase decoding efficiency at the other receiver. A method of continuously transmitting a channel may be used. In addition, in step 506, the intermittent transmission may be maintained as it is, or continuously transmitted during the interval until the response message is received after the message indicating that the intermittent transmission stop condition is satisfied. A message such as the UMAS MEASUREMENT REPORT may be used as a message indicating that the interruption stop condition is satisfied.

8A is a block diagram illustrating transmission and reception signals of a mobile station when data to be transmitted in reverse direction occurs during intermittent transmission of a dedicated control channel according to an embodiment of the present invention.

Referring to FIG. 8A, a time point for transmitting a message indicating that the intermittent transmission stop condition of reference numeral 800 has been satisfied should satisfy step 504 of FIG. 5A. Reference numeral 810 includes a time for receiving a response message from the base station and a time for waiting until the time specified in the message. In addition, although the dedicated control channel is continuously transmitted when the 800 message is transmitted, it may be transmitted intermittently, or the intermittent control channel may be continuously transmitted during the time of 810, but the intermittent control channel may be maintained as it is.

5B is a flowchart illustrating a process of a base station when data to be transmitted in a forward direction occurs during intermittent transmission of a dedicated control channel according to an exemplary embodiment of the present invention.

In FIG. 5B, the purposes of steps 552 and 554 are the same as those of steps 502 and 504 of FIG. 5A. In addition, the intermittent transmission stop message sent in step 556 will include information on the radio resource to be used in the future and information on when the resource can be used in consideration of the amount of data to be transmitted in the forward direction. When the intermittent transmission stop message is sent in step 556, the dedicated control channel may be transmitted intermittently or continuously. In step 556, the intermittent transmission stop message is sent, and in step 557, the intermittent transmission may be performed during the intermediate period until the response message is received, or continuous transmission may be performed. In step 557 of FIG. 5B, a method of retransmitting a message is used as a procedure in case a response message is not received from a mobile station. However, another method may be used. In step 558 of FIG. 5B, the message in step 556 has to wait until the specified time.

8B is a block diagram illustrating transmission and reception signals between a base station and a mobile station when data to be transmitted in a forward direction occurs during intermittent transmission of a dedicated control channel according to an exemplary embodiment of the present invention.

Referring to FIG. 8B, an example of continuously transmitting a dedicated control channel from the time of transmitting the reference numeral 850 message to the time of 860 hours is shown. However, intermittent transmission may be performed. The reference numeral 860 time of FIG. 8B is the time designated in the message 850.

As described above, continuously transmitting the dedicated control channel even though there is no data to be transmitted allows the data to be transmitted to the dedicated data channel at any time by keeping the dedicated data channel stable, but as mentioned above, the interference of the reverse link is increased. By reducing the reverse capacity and increasing the power consumption at the mobile station, the time available to the mobile station is shortened. In addition, the forward dedicated control channel is continuously sent, which results in increased interference and reduced capacity of the forward link. Therefore, in the embodiment of the present invention, it is possible to increase the interference by the transmission of the reverse dedicated control channel, to increase the interference by the transmission of the forward power control channel, and to perform the intermittent transmission which minimizes the power consumption of the mobile station.

As described above, the present invention enables the intermittent transmission of the dedicated control channel to minimize the interference increase by the continuous transmission of the dedicated dedicated control channel, the power consumption of the mobile station, and the increase of the interference by the forward dedicated control channel transmission. And increase the power consumption of the terminal.

Claims (13)

In a broadband code division multiple access communication system in which a frame consists of 15 slots and each slot multiplexes a signal of a dedicated control channel consisting of TFCI, TPC, and pilot bits and a dedicated data channel for transmitting packet data. In the method of intermittently transmitting a signal of this dedicated control channel, Generating an intermittent transmission instruction message including an interruption rate for controlling the signal of the dedicated control channel and an intermittent transmission start time when there is no data transmitted through the dedicated data channel for a predetermined time, and transmitting the message to the mobile station; And intermittently transmitting the signal of the dedicated control channel at the intermittent transmission start time included in the intermittent transmission command message. The method of claim 1, wherein the intermittent rate is determined by the base station in a call setup process with the mobile station. The method of claim 1, wherein the intermittent rate is determined by the base station according to channel conditions with the mobile station when the base station needs to intervene. The method of claim 1, wherein the intermittent transmission instruction message transmits power size information for increasing transmission power of data to be transmitted to the dedicated data channel when the dedicated control channel communicates data through the dedicated data channel while the dedicated control channel is being intermittently transmitted. Intermittent transmission method of a dedicated control channel of the base station further comprising. 5. The method of claim 4, further comprising the step of transmitting the generated signaling data through the dedicated data channel while intermittently transmitting the signal of the dedicated control channel when signaling data is generated in the state of intermittently transmitting the signal of the dedicated control channel. Intermittent transmission method of a dedicated control channel of a base station. The dedicated data channel of claim 4, wherein the dedicated data channel is intermittently transmitted while intermittently transmitting the signal of the dedicated control channel when traffic data having a predetermined size or less to be transmitted through the dedicated data channel is generated while the signal of the dedicated control channel is intermittently transmitted. Intermittent transmission method of a dedicated control channel of the base station further comprising the step of transmitting the generated traffic data through. 2. The method of claim 1, wherein the intermittent transmission process of the dedicated control channel interrupts the signal transmission of the dedicated control channels of some slots among the slots in the frame of the dedicated control channel according to the intermittent ratio. Transmission method. In a wideband code division multiple access communication system in which a frame consists of 15 slots and each slot multiplexes a signal of a dedicated control channel consisting of TFCI, TPC and pilot bits, and a dedicated data channel for transmitting packet data. In a method in which a mobile station intermittently transmits a signal of a dedicated control channel, Transmitting a message requesting intermittent transmission to a base station when there is no data transmitted through the dedicated data channel for a set time; Receiving an intermittent transmission instruction message including an interruption rate and an intermittent transmission start time for interrupting a signal of the dedicated control channel from the base station; And intermittently transmitting a signal of the dedicated control channel at an intermittent transmission start time included in the intermittent transmission instruction message. In a broadband code division multiple access communication system in which a frame consists of 15 slots and each slot intermittently transmits a dedicated control channel consisting of TFCI, TPC, and pilot bits, the base station transmits a signal of a dedicated control channel. In Intermittently transmitting a signal of the dedicated control channel when signaling data is generated in the state of intermittently transmitting the dedicated control channel and transmitting the generated signaling data through a dedicated data channel; Sends a message to the mobile station to stop the intermittent transmission of the dedicated control channel when the traffic data occurs in the state of intermittent transmission of the dedicated control channel, and intermittently transmits the signal of the dedicated control channel at the time indicated in the interrupted transmission stop message. And stopping and transmitting data through the dedicated data channel. A method of transmitting a signal of the dedicated control channel by a base station in a wideband code division multiple access communication system in which one frame includes 15 slots and each slot intermittently transmits a dedicated control channel consisting of TFCI, TPC, and pilot bits To When the traffic data is in the state of intermittently transmitting the signal of the dedicated control channel, if the traffic data is traffic data having a predetermined size or less, transmitting the generated traffic data through the dedicated data channel while intermittently transmitting the signal of the dedicated control channel. Process, If the generated traffic data is the traffic data equal to or larger than the set size, a message for stopping the intermittent transmission of the signal of the dedicated control channel is transmitted to the mobile station, and the interruption of the dedicated control channel signal is performed at the time indicated in the intermittent transmission stop message. A method of transmitting a dedicated control channel of a base station, comprising: stopping transmission and transmitting the generated traffic data through a dedicated data channel. The method of claim 10, wherein the size of the traffic data transmitted through the dedicated data channel while intermittently transmitting the signal of the dedicated control channel is 10 ms. In a wideband code division multiple access communication system in which one frame includes 15 slots and each slot intermittently transmits a signal of a dedicated control channel consisting of TFCI, TPC, and pilot bits, a mobile station transmits a signal of a dedicated control channel. In the method, Transmitting the generated signaling data through the dedicated data channel while intermittently transmitting the signal of the dedicated control channel when signaling data is generated in the state of intermittently transmitting the signal of the dedicated control channel; Transmitting a message to the base station requesting to stop the intermittent transmission of the dedicated control channel signal when traffic data is generated in the state of intermittently transmitting the signal of the dedicated control channel; Stopping intermittent transmission of the dedicated control channel signal at the time indicated in the intermittent transmission stop message and transmitting the generated traffic data through the dedicated data channel when receiving the intermittent transmission stop message from the base station. Method of transmitting control channel. In a wideband code division multiple access communication system in which one frame includes 15 slots and each slot intermittently transmits a signal of a dedicated control channel consisting of TFCI, TPC, and pilot bits, a mobile station transmits a signal of a dedicated control channel. In the method, Transmitting the generated traffic data through the dedicated data channel while intermittently transmitting the signal of the dedicated control channel if the traffic data is the traffic data having a predetermined size or less when the traffic data is generated in the state of intermittently transmitting the signal of the dedicated control channel. and, Transmitting a message requesting to stop the intermittent transmission of the dedicated control channel signal to the base station if the generated traffic data is the traffic data of the predetermined size or more; Stopping the intermittent transmission of the dedicated control channel signal and transmitting the generated traffic data through the dedicated data channel at the time indicated in the received intermittent transmission stop message when the intermittent transmission stop message is received from the base station. Method of transmitting a dedicated control channel.