Method for burst data transmission in mobile communication system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a communication method in a mobile communication system and in particular to a method for transmitting packet data between a base station and a mobile station, which maximizes the probability of successful channel access failure probability and minimizes access channel and dynamically changes the transmission rate.

2. Description of the Prior Art In a conventional mobile communication system used to access the channel with an offset period and a channel assignment message is loaded into one radio frame for the random access delay. According to an assigned channel signal information is exchanged about the quality of service necessary to provide multimedia services, and is assigned to channel traffic to accommodate this information.

FIG. 1 illustrates the structure of a broadcast channel (SHVK), wherein the base station provides system information. This system information is used by mobile stations requesting access from the base station in a conventional mobile communication system.

SHVK comprises two radio frames, each radio frame has a duration of 10 ms. BI denotes a radio frame, TX represents power of the transmission power level and indicates the number of NSC superframe. 72 radio frames are grouped into one superframe and used for calculation of the reverse long code phase. AP interferens represents the reciprocal interference, W indicates the start, continuation and end of the upper frame for each personnel unit of the physical layer, CCS (control using cyclic redundancy check) is used to detect errors in each podurovnevom frame MAC (Media Access Control Data) TA and represents the tail bits for convolutional coding.

FIG. 2 illustrates a frame structure the normal random access channel. This channel is used by mobile stations to request the allocation of a dedicated channel for the graphics, or to transfer small amounts of packet data user.

As shown in Figure 2, D indicates a dummy bit, U / C Field indicates whether the signal is a request to allocate a dedicated channel for traffic transmission or small amount of user packet data, TN denotes a completion node indicating whether the corresponding data processed in base transceiver system or a base station controller, S denotes the sequence number used to determine if there were already accepted input frame data, and paging identifier PID indicates PID which identifies the mobile station.

FIG. 3 illustrates the structure of random access channel frame on which a base station transmits a response message to the mobile station when accessing a mobile station to a conventional mobile communication system. As shown in Figure 3, PID is the identification (ID) of the mobile station whose access request accepted by the base station.

FIG. 4 illustrates a conventional access procedure of a mobile station using the channels shown in Figures 1, 2 and 3.

As shown in Figure 4, the mobile station synchronizes its operation with the base station, acquires the offset random access channel (FDC), which is to be accessed, and attempts to transmit signal traffic. Then, if no other mobile station does not try to transmit data at the same offset, the base station receives data on the random access channel and transmits an acknowledgment on the next forward access channel (RACH). The mobile station, which is not accepted acknowledgment within a specified time, repeatedly trying to gain access during the 16th cycle.

The system of the next generation mobile communications needs to ensure effective functioning of the random access from the mobile station. To accomplish this, from the mobile radio system requires minimization of the time required for receiving a confirmation request for access, by reducing the access unit time, such as time slots or radio frames and the amount of information transmitted during access. An example of a MAC layer protocol, such as DSA + + (dynamic reference clock - DZT), in which the attempt to access the channel during the mini-bars. Besides it is necessary to support as many random access channels to minimize competition caused by contention from a large number of mobile stations.

Therefore, the mechanism of access to channels in the MAC protocol for radiomultimediynoy service requires a successful increase the speed of access to the channel by adding redundancy scheme to conventional transmission scheme on the basis of competition.

Further, in order to effectively support the various parameters of quality of services (CS) required for multimedia traffic, radio channels must be effectively managed. E. Different traffics should be supported, such as PSB (constant bit rate), with PESB (variable bit rate), with PESB-RV (variable bit rate in real-time), with the DRC (available bit rate ) for ATM network (Asynchronous Transfer Mode). Due to the fact that dynamically varied traffic such as PESB should be maintained in real time, a MAC sublayer must efficiently manage radio resources without overhead for signaling.

Conventional mobile communication system can not support multimedia traffic with a transmission rate different to the real time because signal traffic should be additionally exchanged between layer-3 entities when should additionally assigned during a service.

Channel access mechanism in a MAC protocol for radiomultimediynogo service should support both the transmission in a competitive environment, and transfer redundant. In a conventional mobile communication system uses a mechanism clocked AIONA (random access method) to access the channel. A mobile station in a competitive requests assignment of a random access channel and the base station assigns the channel when the base station acknowledges the access. In this case, quality of access for maintenance servicing radiomultimediynogo determined by the number of signal messages transmitted. To reduce delay in random access transmission in a conventional mobile communication system used to access the channel with an offset period and a channel assignment message, which can fit into one radio frame. According to an assigned channel for the signals exchanged information on KU required to provide multimedia services, and allocated a special channel for traffic that may be suitable for this.

However, an additional exchange of signaling messages to appoint a new channel in the linear mode service on a special channel for traffic in the conventional mobile communication system. This assignment procedure and release channels is difficult to implement in real time because it is executed an object layer-3, for example radio bearer control entity (RBS).

SUMMARY OF THE INVENTION The object of the present invention is therefore to provide a method for channel assignment that takes into account the quality of services and to minimize competition with access to the MAC sublayer in order to support multimedia service having traffic with different characteristics in the mobile communication system which provides packet data service.

Another object of the present invention is to provide a method of dynamic rate control in accordance with the amount of data transmitted during the operation of the mobile communication system which provides packet data service.

Furthermore, this method of transmitting status information required for random access to the base station a specific channel in a mobile communication system.

Another object of the present invention is to provide an apparatus and method for minimizing the competition by the mobile station during the channel access in a mobile communication system.

Another object of the present invention is to provide an apparatus and method for dynamic rate control depending on the amount of data transmitted during data transmission in a mobile communication system.

To achieve these and other objects, a method for controlling channel access in a mobile communication system. The base station generates a broadcast channel frame which includes status information indicating whether or not busy continuously changing channel codes, and transmits at predetermined time intervals. The mobile station then selects an available code based on information from the received broadcast channel frame, generates a message with the request for the appointment of the channel and transmits a message requesting channel assignment for a random access channel. When you receive a message with a request for channel assignment on a random access channel, the base station assigns a channel, select the rate and transmits this information via direct access.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description with the accompanying drawings, in which: FIG. 1 - illustrates the structure of a broadcast channel frame on which a base station provides system information to all mobile stations within a cell; FIG. 2 - illustrates the structure of a frame random access channel on which a mobile station accesses a base station according to the prior art; FIG. 3 - illustrates the structure of random access channel frame on which a base station performs paging to the mobile station within a cell or transmits an acknowledgment for a mobile access to the mobile station in accordance with the prior art; FIG. 4 - an illustration of a known procedure for requesting access to the base station by the mobile station; FIG. 5 - illustrates the structure of a broadcast channel frame on which a base station provides channel code information as well as system information to all mobile stations within a cell according to an embodiment of the present invention; FIG. 6 - illustrates the structure of a frame random access channel on which the mobile station attempts to access or transmit an irregular service in accordance with an embodiment of the present invention; 7 - illustrates the structure of a frame for data transmission channel for adding / exclusion channel during service according to an embodiment of the present invention; FIG. 8 - An illustration of the procedure for determining the access channel in which the mobile station determines whether to perform an access attempt based on information about the state of the broadcast channel and access probability according to an embodiment of the present invention; 9 - An illustration of the procedure to access mobile channel in accordance with an embodiment of the present invention; FIG. 10 - Vector mobile data transmission procedure after a successful access attempt according to an embodiment of the present invention; 11 - illustration of base station to provide information about the system and the available channel on a broadcast channel, the paging information and push the successful mobile access by DMA channel and determining, add or delete a channel on a data channel in accordance with an embodiment of the present invention; and Fig. 12 - Vector mobile random access procedure upon receiving information about the available channel code on a broadcast channel in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Below will be described a preferred embodiment of the present invention with reference to the accompanying drawings. In the following description, well known functions or constructions are not described in detail since they would clutter the invention in unnecessary detail.

The embodiment described below provides a more efficient multimedia service through transmission of information about channel status, management of mobile access probability, and dynamic channel management in a packet data service of a CDMA mobile communication system. Those. a packet data service MAC sublayer of a mobile communication efficiently provide various multimedia services to a base station transmitting channel information on a broadcast channel and controlling access probability.

Before presenting the description of the embodiment, note that the base station apparatus and the mobile station is the same as the base station apparatus and a mobile station in well-known mobile communication systems, and its description will be omitted.

Information about the system code number, which can be randomly accessed and transmitted over the paging ID SHVK. 5 illustrates a frame structure SHVK in accordance with an embodiment of the present invention. Fields SHVK frame are as follows.

D / V and DC fields are used by a MAC protocol for assignment and dynamic execution exceptions supplemental channel according to an embodiment of the present invention.

Criminal Code (indicator) indicates whether the 10-ms radio frame SHVK information SHVK1, SHVK2 or PC (Paging Channel) in the W-CDMA system. Without PID for paging a mobile station in SHVK frame of the Criminal Code will be 00 or 01. It is believed that if the Criminal Code is 00, it provided information about SHVKI if the Criminal Code will 0I, it provided information about SHVK2, and if the CC is IX, the information provided PC.

Tx power indicates transmission power level of the transmitting end.

ISC is the system frame number for use in the calculation of the return phase of the long code and the timing of the superframe.

VMP (upward interference power) is the measurement of interference for each sector on the latest reverse link.

W is assembled and disassembled, i.e. beginning, the continuation and completion of the reverse frame.

SHVK data contain information about system parameters PP (peydzhirovanny User) indicates the number of mobile stations that are in the corresponding frame peydzhirovany base station.

PID identifies a call or a mobile station.

STATUS INFO is status information indicating applicable or not available channels for the graph from 0 to 255 corresponding to the base station.

FRP is used to maintain a constant size of the MAC frame.

CRC is added to each MAC sublayer to detect errors, and it is defined by a higher retransmission protocol whether to retransmit data based on the error detection.

TA stands for tail bits for convolutional coding.

The mobile station receives SHVK frame as shown in Figure 5, from the base station, control information about available channel, and requests assignment of a dedicated channel for traffic transmission on an available random access channel. In addition, the mobile station can maintain an irregular data service by transmitting user data on the random access procedure. FIG. 6 illustrates a frame structure of a random access channel which supports random access and irregular service.

As shown in Figure 6, when the mobile station attempts to receive the random access, it records in a U / C (User Traffic / Control Traffic) field whether the transmission data is user information or control information. It also records information about the final identification of the base station, indicating whether to continue to operate the MAC SDU and the frame number to prevent repeated reception of a frame. If the control information to be transmitted, such as a request channel assignment, should be further defined in the NA (desired speed) and the DS field (additional speed) field. Transfer rate channel to be allocated to the mobile station to transmit data to the base station is set at 16 kbit / s in the NA field units. The DS field should be set to the transmission rate of the channel, which can be further appointed as the appointment of a variable range. If the mobile station sets the NS and DS equal to 0, this means that it requests only 16 kbit / s channel; the appointment of an additional channel is not considered.

In the case of irregular transfer of data given by P / L (User Traffic / Control Traffic) field for user data and are not used in the NA (desired speed) and DS (additional speed) field. C / D (command / response) field is used as an ID to determine whether control information transmitted from the mobile station by the base station, the mobile station confirms the request or a new command. If the control information is an acknowledgment, the equivalent NA value requested by the mobile station and the DS is given a value which can be additionally assigned by the base station.

When receiving the acknowledgment channel assignment from the base station, the mobile station transmits data on the corresponding channel. If it is for multimedia service, it should support a variable bit rate. To accomplish this, in accordance with an embodiment of the present invention is realized dynamically MAC protocol for assignment and exceptions supplemental channel by using A / S (Add / Delete) and CP (more speed) fields. 7 illustrates a frame structure for data transmission according to an embodiment of the present invention.

If you must change the baud rate to the current range of the designated channel, the further appoint or remove a range of channels, said DS field. In this case, the C / O (Command / Response) and SN (sequence number) fields are used to confirm the release of the channel assignment between the base station and the mobile station.

With reference to FIG. 5, 6 and 8, description will be given transmission between a base station and a mobile station in a mobile communication system.

FIG. 8 is a flowchart illustrating a procedure for determining the access channel in a mobile station according to an embodiment of the present invention.

As shown in Figure 8, when receiving SHVK frame configuration shown in FIG. 5, the mobile station counts N available access channel codes by analyzing STATUS INFO SHVK to phase III. Then, the mobile station selects one of the N available access channel codes in step 114, and calculates the access probability P in step 115. The probability is calculated by the formula P = IN / total number of channels. Then, the mobile station attempts a channel access in step 117, and if the channel access was successful, it transmits a request for access to a certain code channel at block 119.

First, the mobile station adapts to the situation in the system is continuously taking the broadcast information from the base station in an active state. Information transmitted by SHVK base station comprises a system parameter, the PID, and STATUS INFO. Then, the mobile station applies the system parameter to system operation. In this case, if the data frame contains SHVK PID of the mobile station, it means that the mobile station peydzhiruetsya from the network and the mobile station tries to access the channel. When the mobile station requests channel assignment for paging, the mobile station HC and DC fields, respectively, indicating a desired bandwidth allocation and an additional assigned band are set to 0 because the mobile station does not know the band for processing traffic.

Therefore, the mobile station obtains the number of available codes and code values ​​based on the STATUS INFO SHVK received from the base station and randomly selects one of the available codes. If channel access is required when entering a call, the mobile station determines whether to implement access or not by calculating the probabilities of access. If by refusing access on the basis of the probability of access, the mobile station repeats the procedure for selecting the code SHVK.

FIG. 9 illustrates the operation of the access channel of the mobile station in accordance with an embodiment of the present invention.

As shown in FIG. 9, when receiving frame data by SHVK when channel state ready to access, in step 200, the mobile station detects the locations and number of available codes from SHVK frame data in step 211 and determines whether there is paging data or transmission data for the mobile station in step 213 . In the presence of the paging data (that is, the ID of the mobile station denoted PID SHVK frame, as shown in Figure 5), the mobile station sets the NS and DS field access channel frame as shown in Figure 6, are equal to 0 at step 215, generates a frame access channel for transmission and the acknowledgment delay includes a timer for counting the reception time of an acknowledgment from the base station in step 217. Then, the mobile station determines whether a received acknowledgment from the base station within the timer sequence in steps 219 and 221, and if the acknowledgment has not been received within the timer sequence, the procedure returns to step 211. Otherwise, the mobile station determines the transmission rate at step 235 and proceeds to step 250 for data transmission.

When there is data to be transmitted in step 213, the mobile station calculates the channel requirement for traffic and determines the magnitude of the NA and the DS access channel frame as shown in Figure 6, at step 223. At step 225, the mobile station calculates the probability of access and determines whether or not access is permitted in step 227. If access is permitted, the mobile station generates an access channel frame as shown in Figure 6, transmits the access channel frame and includes acknowledgment timer in step 229. In step 231 and in step 233, the mobile station determines whether a received acknowledgment within the acknowledgment delay timer sequence. If the acknowledgment has not been received within that time period, the routine returns to step 211. Otherwise, the mobile station determines a channel transmission rate in step 235 and proceeds to step 250.

As described above, for channel access, the mobile station transmits a request for channel assignment, the acknowledgment delay includes a timer and waits for confirmation. If the mobile station fails to receive the acknowledgment within the time set by the timer, the channel assignment request is repeated. Otherwise, the mobile station determines the transmission rate by a corresponding code and performs data transmission.

10 is a flowchart showing the procedure of transmitting data in a mobile station according to an embodiment of the present invention.

As shown in Figure 10, the state data is entered at step 300. The mobile station determines whether the received data in step 311. When receiving data, the mobile station determines whether there is a request to change the transmission rate at step 313. Upon receiving the request for change transmission rate, the mobile station brings the transmission rate up to a certain value at step 315. If at step 311 was not taken any data frame or not there is a request to change the transmission rate at step 313 and after step 315, the mobile station checks the state of the traffic queue in step 317. In step 319, the mobile station determines whether or not further be appointed or dismissed channel based on the state line of traffic. If necessary further assign or release a channel, the mobile station sets an amount A / D and DS transmitted data frame as shown in Figure 7, and defines the command in the R / D field in step 321. Otherwise, the mobile station sets a value of D / S DS frame and the transmitted data is 0 at step 323. Then, the mobile station forms a data frame is transmitted as shown in FIG. 7, in step 325. Upon completion of data transmission / reception in step 327, the MS enters a state of readiness for access to the channel at block 350.

As described above, queue management is dependent on the characteristics of the traffic, to support different traffic characteristics, such as DPM, PESB-PB PESB and DRC. The size of the transmission queue is regulated in accordance with a transmission rate of the channel. If the queue buffer PESB DRC and traffic above a certain size, transmitted a request for the appointment of an additional channel. Then, set the value of the fields D / E, DS and R / D and transmits the data frame. If there is no need for additional channel assignment, P / M and DS is set to 0 not to change the transmission rate.

FIG. 11 is a flowchart illustrating an operation of a paging channel allocation and data transmission in a base station upon receiving a request from the mobile station in accordance with an embodiment of the present invention.

As shown in Figure 11, the base station is introduced into the operating state at step 400. The base station performs booting radio resource management table and channel state information in step 411. In step 413, the mobile station waits for generating a message to be transmitted to the mobile station, or receiving a signal or data. The base station also transmits system information and channel state information, with the configuration shown in Figure 5, by SHVK every 10ms interval in step 413. After transmitting the frame SHVK base station analyzes the command requested in step 415. If the command a paging request in step 415, the base station writes the ID of the corresponding mobile station in the PID field SHVK frame and increments the value of PP field in step 417. The procedure then returns to step 413.

If the command is a channel assignment request in step 415, the base station determines whether the request issued by the channel assignment in step 419. If so, the base station allocates the radio resource required by the network in step 421. If the channel assignment request is generated autonomously by the base station in step 419 or after step 421, the base station determines whether the requested channel is available in step 423. If it is not available, the base station indicates radioresursnuyu database based on available resource in step 425 and determines whether a radio resource to be fitted on said stage 427. If the requested channel is available in step 423, or said radio resource can be accommodated in step 427, the base station sets the values ​​of NA and DS and updates the radio resource table in step 429, transmits a response to the channel allocation message in step 431 and returns to step 413 where the operation is completed the request for channel assignment.

If the required command is a transmission request in step 415, the base station determines whether to change the transmission rate at step 433. If there is no need to change the transmission rate, the base station transmits data in a radio frame in step 443 and returns to step 413. However, if there is a need to change the transmission rate, the base station determines whether to change the transmission rate, referring to the data queue at step 435, checks the transmission rate based on available resource in step 437, updates the table of radio resource control in step 439, it transmits data in a radio frame in step 441 and returns to step 413.

To support high-speed radio channel is assigned to a plurality of codes which support a basic combined transfer rate for a single transmission. In this case, the code actually used for transmission is the same as the code for mobile channel access and, as for additionally assigned band, the state of available codes in a radio resource table is changed by a predetermined amount so that transmission capacity is adjusted. The base station transmits system parameters, paging information, and channel state information to the mobile station SHVK 10 ms intervals. For peidzhingovoy communication with the mobile station, the base station writes the PID of the corresponding mobile station in SHVK includes acknowledgment wait timer, and waits for a request for the channel from the mobile station. If the timer expires, the base station resets the paging from the mobile station.

Upon receiving a request for channel assignment from the mobile station, the base station determines whether the mobile station that has issued the request, the mobile station, which has been set paging. If a team with a request for channel assignment is a response to the paging message, the base station assigns the radio resource that meets KU required network. However, if the request is not a response to the paging, the base station determines whether the available radio resource requested by the mobile station. If the radio resource request can be sufficiently satisfied, the base station adjusts the size of the requested radio resource, assigns a channel, and transmits the radio resource allocation of the mobile station. If the request for radio resource can not be sufficiently satisfied, the base station does not pay attention to a request from the mobile station a channel assignment and takes no action.

In the state of the data, the base station can re-adjust bit rate transmission channel, coping with burst transfer at the request of the mobile station to change the transmission rate. Baud rate change by adjusting the assigned channel ranges based on a table of radio resources.

FIG. 12 illustrates random access and data transmission between a base station and a mobile station in accordance with an embodiment of the present invention.

As shown in Figure 12, the base station continuously transmits information about the state of channel codes in real time on SHVK. SHVK When receiving from the base station, the mobile station attempts to access a channel based on e peydzhirovannoy information about the mobile station and channel state information. When receiving the messages requesting access to the channel, the base station transmits an acknowledgment the mobile station and then the mobile station starts to transmit data.

SHVK contains important parameters related to the operation of the system, and the mobile station determines whether it peydzhiruetsya by analyzing the PID SHVK. STATUS INFO SHVK indicates whether one of the available 256 channels. When the mobile station detects available codes, it selects one of the available codes after a random delay, transmits a channel assignment request, and starts a random access.

When receiving the messages requesting access to the channel for a random access channel from the mobile station, the base station extracts data information through decoding. In this case, when there are a sufficient number of channels available and the request of the mobile station can be satisfied, the base station transmits control information on the forward channel of the mobile station in the next clock period. The control information comprises forward link information related to the destination channel. In addition, the base station sets STATUS INFO SHVK frame to indicate that the assigned code applies. If the base station can not meet the request by the mobile station on the channel assignment, the base station disregards the request of the mobile station a channel assignment and maintains STATUS INFO SHVK frame to indicate that the requested channel is available.

Upon receiving the channel assignment acknowledgment from the base station, the mobile station determines the rate of the corresponding channel according to a channel transmission rate contained in the confirmation. If the mobile station can not receive a confirmation within a predetermined time, the mobile station considers that there was competition brush up and re-attempts a channel access after a random delay. When re-attempt to access the channel, the mobile station transmits data frames using the same code quantity as in random access. Due to the fact that the transmission channel can be additionally assigned and released during a data frame transmission when the base station and the mobile station intend to accomplish this, channels can be dynamically controlled.

Job Description of multimedia services in the MAC sublayer of the mobile communication will be given below.

Firstly, each mobile station should satisfy characteristics and meet the requirements of different scheduling classes used in a multimedia service. The media schedule is done DPM PESB-PB PESB and DRC. Although DPM and PESB-RV schedule allows cell loss and errors at a certain level or below, but it is less tolerant of delay. Therefore, since PESB fixed during service bandwidth allocation, it should meet the maximum speed. Besides PESB-RV should provide average speed. DRC is free from limitations on delay, but does not allow the loss of generated errors.

According to the traffic characteristics of 8 kbit / s PCM for speech coding is allowed, and PESV packet data at 2.4 kbit / s, is believed to occur in the DBS graph. High speed transmission period is four times higher than the rate in the low-speed transmission period PESB-RW or PESB traffic. Moving images are transmitted with an average rate of 8 kbit / s PESB-RW or PESB traffic. A request for channel assignment by each mobile station is transmitted in a 10 ms radio frame, and it is believed that the time required to process the message, for example, to form, encoding and decoding radio resource control message is 2.5 ms or less.

To analyze the efficiency of the transmission channels in operating conditions where voice and data coexist in the embodiment of the present invention, voice traffic and data are displayed respectively in DPM traffic or traffic DPS. In this case, it assumes that the mobile station supports one of voice services or data services and the number of mobile stations supporting data service is the same as the number of mobile stations supporting voice service.

Data transmission can be viewed in two ways: transmission on the traffic channel and transmitting packet channel. When transmitting data with limited channels shared between the mobile stations for data and voice mobile stations, the use efficiency of a channel for data service at higher packet scheme than in a linear pattern. In the case where the mobile station transmits the data packet on the data channel may be allocated over the available channels towards PSB traffic. Thus, when the number of mobile stations increases, good performance is manifested when the blocking rate of voice traffic. An embodiment of the present invention provides a mechanism of applying a mobile access probability and broadcasting station information about the state of a reverse channel for packet transmission, taking into account the advantages of packet transmission. Hence, the blocking rate of voice traffic when the number of mobile stations increases is relatively low in the present invention.

Secondly, with regard to the time delay of a data frame in the same conditions, data for the linear scheme shows a lower channel efficiency than transmission over a packet data scheme. Therefore, when the number of mobile stations increases, the average delay of data traffic is rapidly increasing. Due to the increasing number of mobile stations, when the density of traffic on the channel is close to 1, good performance in the embodiment of the present invention. This is due to the fact that reducing the number of access retries due to competition in the embodiment of the present invention as compared to the NTT method in a channel access procedure for data transmission.

Thirdly, the present invention is better adapted to the traffic in real time, with variable bandwidth for moving pictures than NTT DoSoMo WS-MDKP. The channel should be assigned in such a way as to maintain the maximum transmission rate in transmission PESB traffic. To accomplish this, even though the channel band can be assigned based on a peak data rate, this method causes inefficiency during periods other than periods batch mode. Accordingly, the band is assigned based on average transmission rate in the transmission PESB and further band allocated for packet transmission. In order to isolate the additional band in W-CDMA request for assignment of additional bandwidth for the current channel is transmitted on the channel signals, and an embodiment of the present invention can further assign bandwidth, setting the corresponding field during a traffic transmission.

Fourthly, the present invention provides a better performance than W-CDMA in terms of DPM blocking rate PESB PB-speed processing and DRC delay. This is because blocking calls that occur during mobile channel access. In the embodiment, the probability of competition is minimized due to the possibility of using all the available channels as the channel access, and because access probability of the mobile station, when the number of available channels decreases. Thus, the probability of PSB traffic is relatively small. In addition, the transmission is provided in real time by controlling the amount of DRC traffic to be transmitted in order to achieve a certain level of performance PESB PB-priority traffic planning. Conversion of channels to other uses ensures excellent efficiency, since it can satisfy real time requirement with respect to the traffic PESB- PB. In addition, the rapid growth of traffic delays DRC can be prevented transmission DRC traffic during PESB-PB is not a batch period.

In accordance with the present invention, the base station informs the mobile station in advance of the channel state required for mobile access on SHVK in a mobile communication system that provides data transmission services of a patent. Therefore, the probability decreases concurrency. In addition, a method in which the traffic channel can be allocated to meet different types of traffic. Furthermore, a mechanism is proposed, wherein the data rate may be changed during the services that could be satisfied KU mudtimediynoy services with various traffic characteristics.

Although the invention has been shown and described with reference to a certain preferred embodiment, those skilled in the art should understand that it can be made various changes in form and detail without departing from the spirit of the invention and scope of the appended claims.