Method of continuously transmitting user data on a reverse common channel in a mobile communication system

Description: TECHNICAL FIELD [Detailed description of the invention]

Continuous user data transmission method in the reverse common channel of the mobile communication system Background of the invention 1. Technical field to which the invention belongs The present invention relates to a mobile communication system, and in particular, a common cha in the reverse direction in a mobile communication system. It relates to a method of continuously transmitting user data through a flannel. 2. Conventional technology High for 3rd generation (3G) IS-95, which can transmit not only voice but also high-speed data Provides services such as quality audio, video and internet search. This In such mobile communication systems, forward phosphorus from the base station (BS) to the mobile station (MS) There is a reverse link from the mobile station to the base station. Also shown in FIG. So, to send and receive data between base station 4 and mobile station 2 before setting voice call, call (Paging) and access channels (commonly referred to as common channels) It is used. Base station 4 transmits and transfers messages through the calling channel. Receive a response message from motive 2 through the access channel. In addition, move Station 2 transmits a message through the access channel and is called from base station 4. Receive a response message through the channel. Here, multiple call channels And access channels can be used. Call channel is Walsh code Access channel is modulated by long code by (Walsh Code) Will be done. 3G IS-95 provides satisfactory service for voice communication quality .. On the other hand, large-capacity packet data with long burst sections and idle sections. For communication, use RLP (Radio Link Protocol) transmission method for short burst data. communication Provides services using the RBP (Radio Burst Protocol) transmission method. However, it is not possible to maintain (guarantee) sufficient communication quality. Especially 3G IS In the RBP transmission method performed in the dormant state of -95, one SDB (Short) After transmitting a Data Burst) frame, an ACK (acknowledge) signal or NACK (neg) ative acknowledge) Receives a signal and retransmits one previously transmitted SDB frame Decide if you want to or carry other SDB frames. As a result, the RBP transmission scheme in the 3G IS-95 system goes into hibernation. Used only through the reverse common channel in the burst sub-state in Therefore, it exhibits a characteristic that the transmission efficiency is relatively low and the response time is long. like this In the transmission method, one SDB frame is transmitted, a response is received, and then another SDB frame is transmitted. Since the ram is transmitted over a long period of time, packet data communication is excessively delayed. In addition, this results in a decrease in response time reliability and gain rate. Outline of the invention Therefore, an object of the present invention is a long burst message through a common channel in the opposite direction. The purpose is to provide a method for continuously transmitting a page. Another object of the present invention is to pass a common channel in the reverse direction from a burst substate in a dormant state. Full-duplex RBP transmission technology that continuously transmits SDB messages Is to provide a way to achieve. Another object of the present invention is an initial system through a designated reverse common channel. When power control is performed by appropriately adjusting the strength of the connection power, the response time is minimized and the power is transmitted. Proposes a method that enables the transmission of long burst messages that improve transmission efficiency To serve. Furthermore, another object of the present invention is to suspend or suspend the control channel. ed state) to set the control maintenance state or operation state and initialize the RLP An object of the present invention is to provide a method for continuously transmitting burst data without passing through. In order to achieve such an object, in the present invention, the reverse-direction dedicated channel is released. Continuous user data through the reverse common channel of the mobile communication system in the state Provide a method of transmission. One frame in which user data is on a common channel in the opposite direction If it is longer than the data segment in, the user data is in multiple message segments. Divided into ment. After that, multiple segment messages are shared in the opposite direction. It is transmitted in the state of data segments of consecutive frames on the screen. Also, With this method, the base station receives a response message indicating that the segment message has been received. Further prepares the process of deciding whether to receive the segment message by To. Preferably, multiple segment messages are dedicated to power control. Day within consecutive frames on the reverse common channel designated as flannel Loaded on the task segment. A brief description of the drawing Figure 1A shows the SDB message from the mobile station in the reverse direction in the burst sub-state of hibernation. A flowchart showing a conventional method of transmitting through a through channel. Figure 1B reverses the SDB message at the base station in the hibernate burst substate. A flowchart showing a conventional method of receiving through a common channel. Figure 2 sends and receives messages between the base station and mobile station shown in Figures 1A and 1B. The figure which showed the conventional method. FIG. 3A shows an SDB frame in the continuous RBP transmission method according to the embodiment of the present invention. The figure which showed the structure of. FIG. 3B shows a received message in the continuous RBP transmission method according to the embodiment of the present invention. The figure which showed the structure of the response frame to. Figure 4A transmits the NACK signal only to the SDB frame in which the error occurred. A message when an NACK signal is generated according to the first embodiment of the continuous RBP transmission method. The figure which showed the sage transmission / reception and the error correction operation. FIG. 4B shows the field where the NACK signal is lost according to the first embodiment of the continuous RBP transmission method. The figure which showed the message sending and receiving operation, and the error correction operation. Figure 4C shows the mobile station initialization SDB frame according to the first embodiment of the continuous RBP transmission method. The figure which showed the message sending and receiving operation and the error correction operation at the time of loss. FIG. 5 shows a flow showing the operation of the mobile station according to the first embodiment of the continuous RBP transmission method. chart. FIG. 6 shows a flow showing the operation of the base station according to the first embodiment of the continuous RBP transmission method. chart. Figure 7A shows the ACK or NACK response signal for each of the received SDB frames. When the NACK signal is generated according to the second embodiment of the continuous RBP transmission method for transmitting The figure which showed the message sending and receiving operation, and the error correction operation. FIG. 7B shows the ACK or NACK signal according to the second embodiment of the continuous RBP transmission method. The figure which showed the message sending and receiving operation and the error correction operation at the time of loss. Figure 7C shows the mobile station initialization SDB frame according to the second embodiment of the continuous RBP transmission method. The figure which showed the message sending and receiving operation and the error correction operation at the time of loss. FIG. 8 shows a flow showing the operation of the mobile station according to the second embodiment of the continuous RBP transmission method. chart. FIG. 9 shows a flow showing the operation of the base station according to the second embodiment of the continuous RBP transmission method. chart. Figure 10 shows the channels used by base and mobile stations before setting up a voice call. Figure. FIG. 11 is a diagram showing a packet service status in a mobile communication system. Detailed description for embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, in the drawing The same reference code is used for elements showing similar or the same structure as much as possible. In addition, detailed explanations for known technical statements and configurations not particularly related to the gist of the present invention are provided. Omit. First, refer to FIG. 11 for an understanding of the present invention before explaining embodiments of the present invention. The packet service state of the communication system will be described. Packet as illustrated Services are packet null state, initialization state, operating state, control maintenance state, wait It consists of a suspended state, a dormant state, and a reconnected state. Of these, the system Packet service options are connected in the maintain state, operating state, and standby state. To. The packet null state is the default state before the packet service started. Say. When a packet service request occurs in the packet null state, it transitions to the initialization state. Attempts to connect to the packet service. Dedicated control channel (DCC) in this state When H) is set, the initialization state transitions to the control maintenance state. DCCH is RLP And PPP (point-to-point) initialization is a necessary channel. After that, the operating state The logical-only traffic channel (DTCH) is a physical channel (forward and reverse) DCCH) and RLP frames are sent and received through the channel. this If you want to use wireless resources efficiently and reduce the power consumption of mobile stations, relatively When a short inactivity time occurs, the packet service transitions to the wait state. DCC H is released in the standby state, but both the base station and mobile station are in the RLP state, trough. Information such as IC channel allocation and encryption variables is maintained, so DC again CH allocation can be facilitated. In the standby state, the mobile station monitors the calling channel. DCCH specified Then, the standby state transitions to the control maintenance state. Packet within the specified time in the standby state If it is not received, it transitions to hibernation. This hibernation is an idle substate And burst substate, only PPP is maintained, packet service option , Control channel, traffic channel and RLP are released. When PPP is released, the hibernate state transitions to the packet null state. Figures 1A and 1B show pauses corresponding to the 3G IS-95 protocol, respectively. Burst state Transmits SDB messages through a common channel in the opposite direction in the secondary state Of the base station that receives the flowchart showing the operation of the mobile station and the SDB message It is a flowchart which shows operation. Mobile station 2 has a common channel in the opposite direction (for example, a After transmitting one SDB frame through the access channel), it is called from base station 4. Receiving an ACK message through the outgoing channel indicates successful transmission , Receives NACK signal from base station 4 or sends response message (ACK) at a predetermined time If it is not received within the interval (for example, until the timer T_RBP expires), the transmission will be lost. Indicates that you have lost. On the other hand, base station 4 has a common channel (access channel) in the reverse direction. Receive through After checking the CRC (Cyclic Redundancy Code) of the trusted SDB frame, ACK Or determine whether to transmit the NACK signal through the forward calling channel To. With reference to FIGS. 1A and 1B, mobile station 2 has a common channel in the reverse direction in 100 steps. One SDB frame is transmitted through it and the timer T_RBP is driven. .. On the other hand, base station 4 sends SDB frames through the reverse common channel in 112 steps. Determine whether to receive. In this case, base station 4 received the SDB frame. If so, check the CRC of the SDB frame in 114 and 116 steps. Determine if an error has occurred. If no CRC error occurs, proceed to 118 steps Only the ACK signal indicating successful transmission is transmitted to mobile station 2 through the calling channel. , If CRC error occurs, proceed to 120 steps and NACK signal or transmission loss A message notifying the defeat is transmitted to the mobile station 2. On the other hand, mobile station 2 has timer T_RBP in 102 steps and 104 steps, respectively. Determine if an ACK or NACK signal is received before expiration. Timer T_ If an ACK signal is received before the RBP expires, mobile station 2 will perform another SDB in 106 steps. Determine if a frame exists and if another SDB frame exists, 100 Return to stage. However, if there are no other SDB frames, this process finish. NACK or transmission before the expiration of timer T_RBP in 102 and 104 steps A message informing of the failure is transmitted, or ACK, NACK or transmission If the failure message is not transmitted before the timer T_RBP expires, Mobile station 2 advances to 110 steps to retransmit the previously transmitted SDB frame and tie Redrive Mar T_RBP. After that, it returns to the 102nd stage. FIG. 2 sends and receives messages between base station 4 and mobile station 2 in FIGS. 1A and 1B. It is a figure which showed the conventional method. In one embodiment of the invention, a longer bar is an improvement over the conventional RBP transmission scheme described above. Enables transmission of strike messages. Therefore, common channel designation and designation common It is necessary to execute the power control of the channel in advance. An example of a detailed explanation of common channel designation is the Korean special by Ki-Sung JUNG etc. License Application No. 1998-13149 (Title of Invention: "Code Division Multiple Access Communication System" Common Channel Message Transmission Equipment and Methods , filed April 13, 1998) It is disclosed in. Also, an example of a detailed explanation for power control of a designated channel is Korean Patent Application No. 1998-14276 by Jin-Woo CHOI et al. (Title of invention: "Power control method for reverse common channel of code division multiple access communication system" , 1998 (filed April 14, 1998). First, the common channel disclosed in Korean Patent Application No. 1998-13149 The specification of is as follows. Message longer than 1 frame When generated, the reverse common channel becomes a logical dedicated channel (hereinafter referred to as the designated common channel). Specified as) to continuously transmit long messages. More specifically, transmit When a message is generated, mobile station 2 determines whether the message can be transmitted at once. to decide. In this case, if it is possible to transmit at once, the conventional RBP transmission method Use an expression. However, if it is not possible to transmit at once, a long message will be sent. Divide into game segments and add a more message flag (m to this frame message. "ore message flag)" and "designation request flag" are set and transmitted to base station 4. When base station 4 receives a frame from mobile station 2, the more message flag and designation Check the request flag. Here, if the flag is cleared, base station 4 is specified. Clear the flag and transmit the response confirmation message to mobile station 2. Meanwhile, Moa Hula If either the message or the request flag is set, base station 4 will point. It checks whether the specified channel exists, and if the specified channel exists, it Specify this. Base station 4 has a designated channel usage period and priority as necessary. The response confirmation message with the set position is transmitted to mobile station 2. Power of designated channels disclosed in Korean Patent Application No. 1998-14276 The control method is as follows. Base station 4 continuously receives SDB frames If you believe, base station 4 will not only have the above-mentioned information about channel designation, but also power control. Whether or not to perform power control, and the common power control channel for power control Walsh Code number and power control signal position (slot index) Transmit the including message. Base station 4 responds to mobile station 2 with designated channel request After transmitting the answer message, the base station 4 is dedicated to power control after a predetermined time has elapsed. The power control signal is transmitted at a predetermined cycle and at a predetermined position. In this case, move Motivation 2 prescribes within a predetermined time through the channel specified by the response message. It transmits a preamble and regulates the transmission power between base station 4 and mobile station 2. Then, the mobile station 2 sends a message through the designated common channel after a predetermined time has elapsed. Transmit to base station 4. Here, base station 4 does not receive the message from mobile station 2. However, power is continuously transmitted by transmitting the power control signal through the common power control channel. To control. In the embodiment of the present invention, the above-mentioned two channel conditions (common channel designation and designation) Common channel power control) is met, R that carries continuous SDB messages BP can be realized. For the realization of RBP for transmitting continuous SDB frames according to the embodiment of the present invention. For SDB frames and received messages with the structure shown in Figures 3A and 3B A response frame is required. SDB frame and response frame are mobile station 2 and base Each is transmitted by the ground station 4. In Figure 3A, the SDB frame is SDB user data field 10, send It consists of SDB sequence field 12 and more flag field 14. Send The SDB sequence field 12 is a SDB frame transmitted continuously from the mobile station 2. Provides the sequence number of the machine, and the more flag field 14 is the current SDB frame. Indicates whether or not there is an SDB frame to be transmitted next to the machine. In Figure 3B, the response frame is the response field 20 and the received SDB sequence. It consists of field 22. Response field 20 contains an error in the received message Inspects the presence or absence and informs the mobile station 2 of the contents by an ACK or NACK signal. .. The received SDB sequence field 22 is the sequence of the currently received SDB frame. Provide the number. Send and receive SDB sequence fields 12 and 22 are the same It has one bit. When transmitting SDB messages continuously, it will be described later according to the response status of base station 4. It can be classified into two cases. One is that base station 4 detects an error It is a method of transmitting the NACK signal only in the case, and the other is received from the mobile station 2. This is a method of transmitting an ACK or NACK signal to each of the SDB frames. 4A to 6 show the first embodiment of the continuous RBP transmission method according to the present invention. , 7A-9 show the second embodiment of the continuous RBP transmission method. 1st Embodiment Figure 4A transmits the NACK signal only to the SDB frame in which the error occurred. This is the first embodiment of the continuous RBP transmission method, in which the mobile station receives the NACK signal. It is a figure which showed the message sending / receiving and the error correction operation in the case. Mobile station 2 is electric While continuously transmitting SDB frames through the force control designated common channel, the base Receive the response message shown in Figure 3B from station 4. In this case, the NACK signal Upon receiving the reply message containing, mobile station 2 receives the reply message SDB Sea After inspecting Kensfield 22 to find the error-prone SDB frame , Retransmit the corresponding SDB frame. The continuous RBP transmission process ends And base station 4 is based on the SDB sequence after canceling the power control designated common channel. Then recombin the received SDB frames to build a complete SDB message To do. Figure 4B shows the case where mobile station 2 fails to receive the NACK signal due to the characteristics of the wireless environment. It is a figure which showed the error correction operation of. SDB frame received from mobile station 2 When a error occurs, base station 4 has a response message with a NACK signal and its corresponding Transmit the corresponding received SDB sequence number and drive the timer T_NACK .. T_NA from mobile station 2 to the SDB frame corresponding to the received SDB sequence number If it is not received within the CK time, the base station 4 determines that the NACK signal has been lost and N Retransmit the ACK signal. On the other hand, if mobile station 2 does not receive the NACK signal, S Judge that the transmission of the DB frame was successful. In addition, mobile station 2 is NA from base station 4. Receive SDB sequence of NACK response message only when receiving CK signal Retransmit the SDB frame corresponding to the number. In this way, continuous RBP transmission method When the formula is completed, the base station 4 releases the power control designated common channel and then the SDB system. -Recombining received SDB frames based on Kens, complete SDB message Build sage. Figure 4C shows the error correction operation when the mobile station initialization SDB frame is lost during transmission. It is a figure which shows the work. Base station 4 receives one SDB frame and of the SDB frame Inspect more flag field 14. Here, the more flag field 14 is set up. If so, base station 4 drives timer T_SDB and transmits from mobile station 2. Wait to receive the next SDB frame to be made. Base station 4 is timer T_ If the next SDB frame is not received by the expiration of SDB, base station 4 is a mobile station. Send SDB sequence of SDB frame received just before is first initialized Received SDB sequence field and N set to the sequence number next to the sequence number Transmit a response message containing the response field set to ACK to mobile station 2. To. On the other hand, if mobile station 2 does not receive the NACK signal, it will be the initialization message. Judge that the transmission was successful. When the continuous RBP transmission method is completed in this way, Base station 4 is based on the SDB sequence after canceling the power control designated common channel. Combine the received SDB frames again to build a complete SDB message To. 5 and 6 are according to the embodiments described with reference to FIGS. 4A, 4B and 4C. Flowchart showing the operation of the mobile station and the operation of the base station with respect to the data communication method Is. FIG. 5 shows the operation of the mobile station according to the first embodiment of the continuous RBP transmission method. It is a flowchart, and FIG. 6 is a base station according to the first embodiment of the continuous RBP transmission method. It is a flowchart which showed the operation of. With reference to FIGS. 5 and 6, the SDB message transmitted in the 200 steps of FIG. 5 is When it occurs, mobile station 2 keeps two or more frames of SDB messages in 202 stages. Determine if you have it. SD if the SDB message is one frame The B message is transmitted to the base station 4 using the conventional RBP transmission method. On the other hand, SD If the B message is two or more frames, is mobile station 2 base station 4 in 206 stages? Request the allocation of the specified common channel. When the request for the designated common channel is received in the 300 steps shown in FIG. 6, the base station 4 receives the request. It is determined whether or not there is a designated common channel that can be accepted in 302 steps. This point If the request is not acceptable, base station 4 proceeds to stage 304 and clears the designated flag. If the message is transmitted to mobile station 2 and the request is acceptable, base station 4 is 3 After proceeding to stage 06 and setting the power control designation common channel, set the designation flag. The message is transmitted to mobile station 2. Whether mobile station 2 has the designated flag of the received message set in 208 steps To judge. In this case, mobile station 2 is 206 if the specified flag is not set. Go to the stage and reconfigure the designated common channel allocation request. Meanwhile, the reception message If the designated flag is set on the page, mobile station 2 advances to 210 steps and the SDB message. Divide the sage into frame segments. The SDB segment is shown in Figure 3A. Recorded in SDB user data field 10. At stage 212, mobile station 2 Set more flag field 14 on send SDB sequence field 12 Display the SDB sequence number. When the last SDB segment is transmitted, Reset the flag field 14. Mobile station 2 is sent from base station 4 in 214 stages Determine if you want to receive a trusted response message. Here, the response message If the mobile station 2 does not receive the more flag displayed in 216 steps, the transmission SDB system -Power control designation for one SDB frame containing Kens number and SDB user data Transmit to base station 4 through a common channel. After that, mobile station 2 is now in 218 stages Determine if the currently transmitted SDB frame is the last SDB frame. Most If it is not a later frame, the processing process returns to 210 steps. On the other hand, the base station 4 determines whether or not the SDB frame has been received in the 308 stage. Here, when the SDB frame is received, the base station 4 has the SDB frame in 310 stages. Check the CRC of the above to determine if an error has occurred. In this case, an error occurs If not, base station 4 receives SDB frame in 312 steps by NACK signal. Determine if it is a retransmitted frame. Here, the retransmitted frame If so, base station 4 has the more flag of the SDB frame set in 316 steps. Judge whether or not. When the more flag is set, base station 4 has 318 steps. If the next SDB frame has not been received, the timer T_SDB is driven and the error -Make corrections. If the more flag is not set, the processing process returns to 310 steps. To. At stage 328, base station 4 determines if timer T_NACK expires. To do. Timer T_NACK is set to transmit NACK signal from base station 4 It is not used when the SDB frame is normally received. Timer T_N If an SDB frame is received before the ACK expires, base station 4 advances to stage 308. Mu. According to this embodiment, when the reception of one SDB frame is successful, the base station 4 responds. Answer Do not transmit the message. For example, in Figure 4A, SD where base station 4 succeeded in transmission. Indicates that no response message is transmitted for B frames (1), (2) and (4). ing. Here, (1), (2) and (4) indicate the sequence number of the SDB frame. .. As shown in Figure 6, the SDB frame received in stage 310 issues a CRC error. When it is generated, the base station 4 proceeds to the 320th stage and transmits the NACK signal to the mobile station 2. That is, the sequence number of the SDB frame in which the error occurred is the received S in Fig. 3B. Display on DB sequence field 22 and send NACK signal to response field 20 Display above. As an example, if an error occurs in the SDB frame (3), the base station 4 transmits a response message containing the NACK signal (3) in FIG. 4A. Shown in Figure 4B As such, base station 4 has a poor transmission of NACK signals to mobile station 2. The timer T_NACK is driven in 322 steps to determine the reception section. When mobile station 2 receives a response message containing a NACK signal (3) from base station 4, , 221 Check the received SDB sequence field 22 of the response message in step 22 To. Mobile station 2 has 222 SDB frames corresponding to the sequence number (Fig. 4A). SDB frame (3)) is retransmitted. To this retransmitted SDB frame (3) On the other hand, the process in which the base station 4 transmits the ACK signal (3) to the mobile station 2 is optional. Also, mobile station 2 receives the ACK signal (3) by the time the timer T_RBP expires. The process of deciding whether or not to do so is also an option. Here, base station 4 is timer T_ Response message to SDB frame (3) retransmitted by RBP expiration If the transmission is not performed, the mobile station 2 determines that the transmission has been successful. If mobile station 2 fails to receive a response message containing the NACK signal (3), it will move. Station 2 determines that the previous SDB frame was successfully transmitted and the next SDB frame Is transmitted to base station 4. SD for NACK signal in 308 and 328 steps If the B frame is not received by the expiration of the timer T_NACK, base station 4 Goes to 330 steps and retransmits the NACK signal to mobile station 2. Then base station 4 Re-drives the timer T_NACK in 332 steps. See Figure 4B. When the Immers T_NACK expires, Base Station 4 retransmits the NACK signal (3) to Mobile Station 2. You can confirm that it will be transmitted. On the other hand, base station 4 has 308 steps and 324 steps until the timer T_SDB expires. If the reception of one SDB frame fails, it is transmitted from mobile station 2 in 326 stages. Received SDB Sequence field 22 First displayed latest received SDB Mobile station 2 with a response message containing the next sequence number of the frame and the NACK signal To transmit to. After that, base station 4 has timer T_ in 318 steps (set timer T_SDB). After driving the SDB, proceed to 328 steps. See Figure 4C, Timer T_ When the SDB expires, base station 4 will see the next sea of the most recently received SDB frame (2). The NACK (3) signal corresponding to the Kens number (3) is transmitted. At stage 218 in Figure 5, mobile station 2 is the last SDB frame at present. After determining whether or not, proceed to 224 steps to drive the timer T_RBP. So After that, at 226 steps, mobile station 2 decides whether to receive a response message from base station 4. to decide. On the other hand, base station 4 is the last SDB frame in 314 stages (more flag reset state) When the state) is received, the response message including the ACK signal indicating that the reception is completed is advanced to 334 steps. Transmit the message to mobile station 2. After that, base station 4 is designated for power control in 336 stages. Release the common channel and combine the received SDB frames again in stage 338. Let's build a complete SDB message. By the time the timer T_RBP expires in mobile station 2 at 226 and 227 stages If the response message fails to be received, it advances to 238 steps and transmits the latest (last). Retransmit the SDB frame. On the other hand, when a response message is received, mobile station 2 Determines in 236 steps whether response field 20 of the response message is ACK Refuse. Here, in the case of NACK, the mobile station 2 transmits the latest by proceeding to the 238 stage. Retransmit the SDB frame. Messages received before the expiration of timer T_RBP have 226 and 228 steps If it is not the response message of the latest (last) transmitted message on the floor, the mobile station Go to step 230 and is response field 20 of the response message in the ACK state? Judge whether or not. If this response field 20 is in the NACK state, mobile station 2 Receive response message Check sequence number from SDB sequence field 20 Put out. After that, the SDB frame corresponding to the sequence number detected in 234 steps Is retransmitted to base station 4. Second Embodiment RBP transmission with reference to FIGS. 3A, 3B, 7A, 7B, 7C and 8 and 9. The second embodiment of the method will be described in detail. In the second embodiment, ACK or N An ACK signal is generated for each of the SDB frames received from mobile station 2. Figure 7A shows an error-free SDB frame with an ACK signal. The first RBP transmission method that generates a NACK signal for the generated SDB frame. 2 Embodiments, data communication and error correction when a NACK signal is generated It is a figure which showed the operation. Mobile station 2 is S through the power control reverse direction designation common channel Receive a response message from base station 4 while continuously transmitting DB frames .. In this case, if the response message has a NACK signal, mobile station 2 responds. Receive message Check SDB sequence field 22 for error SD After detecting the B frame, the corresponding SDB frame is retransmitted. Continuous R When the transmission is completed by the BP transmission method, the base station 4 sets the power control designated common channel. After canceling, the received SDB frames based on the SDB sequence are recombined. Let's build a complete SDB message. In Fig. 7B, mobile station 2 responds to ACK or NACK from base station 4 depending on the characteristics of the wireless environment. It is a figure which showed the error correction operation when the reception of an answer signal fails. Mobile station 2 is S It transmits a DB frame and drives the timer T_RBP. Transmitted SDB frame The ACK or NACK signal with the sequence number of the timer is the timer T_RBP. If not received by the expiration time, mobile station 2 has an error in the SDB frame Judging that, the SDB frame is retransmitted. Alternatively, mobile station 2 has a timer T_AC Drive K to inspect the response message from base station 4 and retransmit the SDB frame Decide whether to send. In this way, transmission is completed by the continuous RBP transmission method. Then, the base station 4 releases the power control reverse direction designation common channel, and then SDB sea. Complete SDB message by recombining received SDB frames based on Kens Build sage. Figure 7C shows the error correction operation when the mobile station initialization SDB frame is lost during transmission. It is a figure which showed the work. After receiving the SDB frame, base station 4 receives the SDB frame. Inspect the more flag field 14 of the room. If the more flag is set, Base station 4 drives timer T_SDB, and the next SDB transmitted from mobile station 2 Wait to receive the frame. However, the timer T_SDB has expired If the SDB frame is not received by the time, base station 4 receives the latest SD. The sequence number next to the transmission sequence number in the B frame and the NACK signal The including response message is transmitted to mobile station 2. Correction of this error is performed on mobile station 2 Will be done. No response message must be received by the time timer T_RBP expires For example, mobile station 2 determines that the latest transmitted SDB frame has been lost and has the same SD. Retransmit the B frame. In this way, transmission is completed by the continuous RBP transmission method. Then, base station 4 releases the power control reverse common channel, and then SDB sequence. Complete SDB message by recombining received SDB frames based on Build the 8 and 9 show the message transmission / reception described with reference to FIGS. 7A, 7B and 7C. It is a flowchart which showed the operation of the mobile station and the operation of a base station with respect to a signal. Figure 8 The operation of the mobile station in is the response field 20 of the response message received from the base station 4. Is inspected to classify the ACK or NACK signal, so the operation is almost the same as in Fig. 5. To. That is, the 200 to 238 steps in Fig. 5 are the 400 to 438 steps in Fig. 8. It almost coincides with the stage. The operation of the base station in Fig. 9 is different from that in Fig. 6, and the received SDB screen Since an ACK or NACK signal is transmitted to each of the rams, the ACK signal is transmitted. Further prepare for the process of sending. That is, at the 511th stage, it is displayed as an ACK signal. The response signal including the received SDB sequence number is transmitted. As mentioned above, the present invention provides initial system contact through a designated reverse common channel. RB of long burst data when performing power control to adjust the strength of continuous power appropriately It has the advantage of enabling P transmission, minimizing response time, and improving transmission efficiency. R The BP transmission method is limited to hibernation in the conventional 3G IS-95, but it is hibernation. Control channel when transitioning from a state or standby state to a control maintenance state or an operating state Hibernate without going through the RLP initialization process realized by assigning of Burst data can be continuously transmitted even in the standby state. .. As a result, the response time and the transmission delay of the data packet can be shortened. .. The present invention has been described above based on specific embodiments, but these are merely examples. It is said that various modifications are possible without departing from the idea and scope of the present invention. It is obvious to those who have ordinary skills (knowledge) in the technical field.