KR20020004645A - Buffer State Report Message And Method Of Making Report Buffer State To Access Network In High Data Rate System - Google Patents

Abstract

The present invention relates to a method for reporting a buffer state report message (BSR message) of a terminal to a base station in a high-speed wireless data communication (HDR) system, and a structure of information for reporting a state of an RLP buffer to a base station. .

The present invention observes the state of the RLP buffer of the terminal and reports the BSR message to the base station. The BSR message has a message ID and a report reason. When the reason for reporting is based on the threshold of buffer occupancy, only the message ID and the reason for reporting are sent to the base station as a BSR message. If the reason for the report is periodic transmission, the current occupancy of the buffer (BufferOccupancy) and average occupancy (AvgBufferOccupancy) and distribution of occupancy (BufferOccupancyVariance), average data delay time in the buffer (AvgDelay), maximum transmission delay time (MaximumDelay), reverse traffic channel The average transmission rate (AvgTxRate), the maximum transmission rate (MaximumTxRate), and the number of times the transmission rate was reduced during the observation period (NumReduction) are prepared as BSR messages and transmitted to the base station. The base station transmits a BSR parameter message to the terminal to determine a time interval for preparing a BSR message and a threshold of buffer occupancy.

Description

Buffer State Report Message And Method Of Making Report Buffer State To Access Network In High Data Rate System}

The present invention relates to a method for reporting a status of a radio link protocol (RLP) buffer of a terminal to a base station in a high data rate (HDR) system, and a structure of information for reporting a status of the RLP buffer to a base station. It is about.

In particular, the present invention, the terminal retrieves the status of the RLP buffer and transmits a buffer state report message (BSR message) to the base station through the reverse traffic channel, the base station analyzes the BSR message to efficiently calculate the amount of reverse traffic The present invention relates to a method of transmitting a BSR message and a structure of a BSR message.

As is known, a high-speed wireless data communication (HDR) system is a mobile data communication system for high-speed packet data communication service only. Basically, voice communication service is not supported, and only data communication service is supported.

However, mobile communication systems including high-speed wireless data communication (HDR) systems have limited resources for communication channels, and the stability of channels is not high. Therefore, various methods for overcoming such communication environments and providing high-speed and high-quality services are provided. Are being presented.

In particular, much effort has been put into establishing a stable communication channel between a base station and a terminal and a high speed, high speed, high quality information (signal) transmission technology based thereon.

Moreover, in the case of the high speed wireless data communication (HDR) system, since the wireless data communication service is supported, accurate and stable transmission of data and efficient data transmission control are important factors.

The process of data communication in a high speed wireless data communication (HDR) system is summarized as follows.

Information from the base station (or sector) to the terminal is transmitted in a time division multiplexed slot structure with data, pilot signals, MAC channels, etc., and the terminal receives the information, with the forward link from the base station (or sector) to the terminal. When the pilot signal is received, the terminal selects the base station (or sector) according to the strength (receive sensitivity) of the pilot signal.

In addition, the terminal determines the forward data rate from the pilot signal and loads the base station (or sector) selection information and the forward rate information on the DRC (Data Rate Control) channel of the HDR reverse link and sends it to the base station (or sector).

The base station (or sector) determines the data rate to the terminal based on this forward rate and performs data transmission in accordance with the rate.

In this case, when the terminal transmits DRC information in the nth slot, the base station (or sector) performs data transmission using the forward data rate in the n + 2th slot, and the transmitted data receives the DRC information in the nth slot. A user (terminal) is distinguished by applying a Walsh code given to the transmitting user.

1 shows a forward channel (link) structure of a high speed wireless data communication (HDR) system.

Pilot channel 103, traffic and control channel 104, FA channel 105, RA channel 106, reverse power control channel 107 from base station (Access Network) 101 to access terminal 102 ) Is done.

The pilot channel 103 is used as a basic signal for system acquisition, the traffic and control channel 204 is used for data to be transmitted and control data, and the forward activity channel 105 is used for traffic channel and control. It is used to inform the terminal of the existence of data on the channel.

In addition, the RA Activity Channel 106 is used to inform the terminal of congestion of the reverse traffic channel, and the Reverse Power Control Channel (107) is a reverse direction of the terminal. Used to control the outgoing power of the link.

In the high-speed wireless data communication (HDR) system, a channel structure is transmitted in a time division multiplexing form in a slot, and data is transmitted using modulation schemes and coding schemes of QPSK, 8PSK, and 16QAM. It is transmitted to a specific user (terminal) at any one of 38.4kbps, 76.8kbps, ..., 2457.6kbps forward data rate and 4.8kbps to 153.6kbps per terminal in reverse direction.

The data rate over the reverse traffic channel has one of six values, as shown in FIG.

In the HDR reverse link, data is transmitted in a Q channel, and in the I channel, a DRC channel, an RRI channel, and a pilot channel have a time division multiplexed slot structure.

The Data Rate Control (DRC) channel is used to inform the base station (or sector) of the data rate of the forward link, that is, the rate of data to be transmitted from the base station (or sector) to the user (terminal), and to transmit data at this rate. Base station (or sector), that is, user (terminal) is used to tell which base station (or sector) to receive data communication service. DRC information basically transmits the same information for one slot, The content is updated.

The Reverse Rate Indication (RRI) channel is used to inform the base station (or sector) of the reverse data rate, and the pilot channel is used for power control of the reverse link.

As described above, in a high-speed wireless data communication (HDR) system, data communication is performed between a base station and a terminal through a time division multiplexed slot structure, selection of a base station (or sector) and reverse power control and Data transmission with the terminal is being made.

In particular, the data transmission rate through the reverse traffic channel has one of six values as shown in Figure 2, each terminal can increase or decrease the transmission rate according to the control information sent from the base station, the maximum transmission rate is It is determined by the Reverse Rate Limit Message as shown in Figure 3, and the base station transmits the control information according to the state of the channel, type of service and priority.

This control is one of the methods to prevent the congestion of the reverse traffic channel that greatly affects the performance of the system as a whole.

Because congestion of the reverse traffic has a great effect on the performance of the entire system, when converse congestion occurs, each terminal should reduce the transmission speed of the reverse traffic channel, and also because the channel capacity is limited and the service priority is different, Higher service is controlled to increase the traffic transmission speed by giving priority to low priority service.

In order to control the transmission rate according to the priority and to prevent congestion, a high speed wireless data communication (HDR) system uses a reverse rate limit message, a reverse activity bit (RAB), and rate persistence vectors (RPV).

The reverse rate limit message is transmitted on the forward control channel.

In FIG. 3, a field and length of a reverse rate limit message are shown. The message ID is 8 bits, set to '0x01', and indication information for indicating whether or not the rate limit value term is included (RateLimitIncluded). ) Is set to '1' if the rate limit value is included.

In addition, the rate limit value (RateLimit) field indicates the maximum transmission rate that the terminal can transmit. If this field value is' 0x0 ', the maximum transmission rate is 4.8kbps, if it is' 0x1', 9.6kbps, and if it is' 0x2 ', 19.2kbps,' 38.4kbps for 0x3 ', 76.8kbps for' 0x4 ', and 153.6kbps for' 0x5 '.

Reserved bits (Reserved) is variable in length (Variable).

This reverse rate limit message has a rate limit value, which is the maximum reverse rate, and each terminal does not have a rate higher than the rate limit even if the reverse channel condition is good. Further, different values are provided according to types and priorities of services, and higher limits are assigned to high-speed services or high-priority services.

The RAB is received through the RA channel and informs terminals of congestion of the reverse link. The value changes in units of RAB length, and has a value of '0' or '1'. The transmission rate is 600 / RABLength bps, and '1' means 'congestion', and '0' means no congestion.

Each terminal receives the RAB transmitted from all the base stations in the active set and transmits traffic to all the base stations in the active set in the reverse direction. Therefore, when RAB = 1 is received at at least one base station, the reverse traffic channel is congested. Assume that it is a state.

The RPV is set by the base station, and for each terminal, one persistence vector required when the reverse link is congested and another persistence vector required when the congestion is not congested.

These vectors have each persistence probability for the current data rate as an element of the vector, and an appropriate vector value is assigned according to the type and priority of the service.

In addition, each terminal performs a persistence test according to whether the congestion and the current reverse traffic transmission rate, and can increase or decrease the transmission rate only if the test is successful.

Therefore, each terminal determines the maximum data rate as shown in FIG. 4 using the RAB and the persistence test.

When a new packet is transmitted through the reverse traffic channel, the terminal performs a persistence test. If the test fails, the terminal maintains the current transmission rate. If the test succeeds, the terminal adjusts the maximum transmission rate according to the RAB value.

That is, if the persistence test is successful and RAB = 0 is received from all base stations in the active set, the maximum transmission rate is doubled, and when RAB = 1 is received from at least one base station, the maximum transmission rate is reduced to 1/2.

At this time, the adjusted maximum transmission rate cannot exceed the data rate limit value (RateLimit) assigned to the corresponding terminal. Therefore, a smaller value among the newly set maximum transmission rate and the limit value (RateLimit) is used as the maximum transmission rate.

As described above, in a high-speed wireless data communication (HDR) system, a base station must adjust a rate limit value and a persistence vector value according to the type and priority of a service, and in order to ensure proper data quality of service (QoS), Control information (RAB, RateLimit, Persistence Vectors) is essential.

However, in the conventional high-speed wireless data communication (HDR) system, the data for calculating accurate control information are extremely insufficient as the type of service, QoS parameter, receiving power of the terminal, and error rate of the received data. It is difficult for the base station to calculate accurate terminal control information.

Moreover, it is more important to prevent congestion in advance than to solve this after the congestion condition occurs, but this is not possible with the prior art.

Therefore, in order to determine congestion prevention of reverse traffic channels and to determine rate limit values and persistence vector values according to types and priorities of services, the base station needs to know the state of the terminal accurately.

The present invention reports the state information of the RLP buffer from the terminal to the base station, whereby the base station calculates accurate terminal control information based on the RLP buffer state report information, thereby preventing reverse traffic congestion. In the (HDR) system, a buffer status report method of a terminal and a buffer status report information structure of a terminal are presented.

In addition, the present invention is to report the status information of the RLP buffer from the terminal to the base station to report through the reverse traffic channel, the base station analyzes the RLP status report message to calculate the correct terminal control information, thereby preventing the reverse traffic congestion The present invention provides a method for reporting a buffer status of a terminal and a structure of a buffer status reporting information of a terminal in a high speed wireless data communication (HDR) system.

In addition, the present invention, when reporting the status information of the RLP buffer from the terminal to the base station to report through the reverse traffic channel, the configuration and transmission of the RLP buffer status report message is controlled by the base station using the BSR parameter message, from the base station In order to accurately determine the state of each terminal from the buffer status report message transmitted by the terminal under the control of the RLP buffer status report of the RLP buffer status, the congestion of the reverse traffic channel can be predicted and the appropriate rate limit value and the persistence vector value can be calculated. A method of reporting a buffer status of a terminal and a structure of a buffer status report information of a terminal in a high-speed wireless data communication (HDR) system is provided.

1 is a block diagram showing a forward channel structure of a high speed wireless data communication (HDR) system;

2 is a diagram illustrating a transmission speed and a payload size of a reverse traffic channel in a high speed wireless data communication (HDR) system;

3 is a diagram illustrating a reverse rate limit message structure of a high speed wireless data communication (HDR) system;

4 is a flowchart of a method for controlling reverse traffic transmission rate in a high speed wireless data communication (HDR) system;

5 is a main block diagram of a high speed wireless data communication (HDR) terminal to which the present invention is applied;

6 is a timing diagram illustrating an example of buffer status report message generation according to a threshold in the present invention.

7 is a diagram showing an example of a buffer status report message structure of the present invention;

8 illustrates an example of a buffer status report parameter message structure of the present invention.

The buffer status report message of the HDR system of the present invention includes a buffer status report message (BSR message) when reporting a radio link protocol (RLP) buffer status of a terminal for reverse traffic channel control of a base station; At least (a). Message ID, (b). If there is a report reason field and the report reason is due to periodic transmission, (c). Current buffer occupancy, (d). Average buffer occupancy, (e). Variance in buffer occupancy, (f). Average latency of data in the buffer, (g). Maximum transmission delay time of data during the observation period, (h). Average reverse traffic channel rate, (i). Maximum reverse traffic channel transmission rate, (j). It is characterized by including the number of times the transmission rate is reduced during the observation period.

In addition, the buffer status report message of the present invention is characterized in that, if the report reason is excessive or too low based on the predetermined amount of buffer occupancy, the BSR message includes only a report ID field in which the message ID and the excessive or underestimated message are recorded. It is done.

In addition, the present invention transmits a BSR parameter message from the base station to the terminal in order to control the creation and transmission of the BSR message from the base station to the terminal so that the terminal reports the BSR message to the base station, wherein the BSR parameter message; (a). Message ID, (b). Cycle of writing BSR messages, (c). A threshold for determining excessive and underestimation of the RLP buffer occupancy, (d). A buffer status report parameter message of a high speed wireless data communication (HDR) system, characterized by including a down time when a BSR message is created by a threshold.

In addition, the buffer status report parameter message of the present invention is characterized in that the idle time is set to the same or different value for each of the thresholds for determining the over or under RLP buffer occupancy.

In addition, the method for transmitting a buffer status report message of a high speed wireless data communication (HDR) system according to the present invention comprises: transmitting a BSR parameter message as BSR message creation control information through a forward link in a high speed wireless data communication (HDR) system, a terminal; Decoding the BSR parameter message, characterized in that the terminal observes the state of the RLP buffer in accordance with the decoding result, and writes the observation result in the BSR message to the base station via the reverse link.

In addition, in the buffer status report message transmission method of the present invention, the BSR parameter message is transmitted to the terminal through the control channel or the forward traffic channel of the forward link, the BSR message is transmitted to the base station through the reverse traffic channel of the reverse link. It features.

In addition, in the buffer status report message transmission method of the present invention, when the report reason is due to the excessive or excessive buffer occupancy, the terminal in the BSR message (a). Message ID, and (b). It is characterized in that the BSR message transmission is performed only for the reporting reason recorded only whether the buffer occupancy is excessive or excessive.

The structure of the BSR message and the BSR parameter message of the present invention and the buffer status report message transmission method using the BSR message and the BSR parameter message will be described with reference to the accompanying drawings.

5 shows an RLP buffer 501, a transmitter 502, and a BSR message generator 503 of a terminal to which the present invention is applied.

The RLP buffer 501 supplies the reverse traffic data to the transmitter 502 so that the transmitter 502 transmits the reverse traffic data to the base station.

At this time, the BSR message generator 503 observes the RLP buffer 501 for a predetermined period of time to generate a BSR message, and supplies the generated BSR message to the transmitter 502 so that the transmitter 502 sends the BSR message through a reverse traffic channel. Notify the base station.

The generation and reporting timing of the BSR message according to the present invention is shown in FIG. 6, and the BSR message structure is shown in FIG.

Basically, the BSR message is periodically generated and reported to the base station according to a predetermined time, but in some cases, it is necessary to urgently transmit the BSR message. For example, in this case, the buffer occupancy is excessive or too low. .

If the buffer occupancy is excessive, the terminal may not be able to tolerate it any longer, so the base station wants to process it first. If the buffer occupancy is insufficient, there is enough room so that the base station buffers the service for other emergency services. It may be the case that the transmission speed of the terminal having a sufficient occupancy can be lowered.

FIG. 6 illustrates a case of generating and transmitting a BSR message based on a threshold value by observing a buffer occupancy amount. When the occupancy amount of the buffer exceeds the upper limit value or falls below the lower limit value, the BSR message is generated. It shows creating and sending a message.

The occupancy of the buffer at an arbitrary time T1, T2 has exceeded the upper limit, and therefore, at this time T1, T2, a BSR message is reported to the base station.

If the occupancy of the buffer exceeds the upper limit, it means that the transmission speed is smaller than the traffic occurrence rate. Therefore, it is necessary to increase the transmission speed to ensure the quality of service. Therefore, to handle this, the BSR message when the occupancy of the buffer exceeds the upper limit. To generate and report to the base station.

At another arbitrary time T3, the occupancy of the buffer has reached the lower limit and thus reports a BSR message to the base station at this time T3.

If the occupancy of the buffer falls below the lower limit, the transmission speed can be lowered for more urgent service, which is useful information for efficient channel operation.

At another arbitrary time T4, the occupancy of the buffer has exceeded the lower limit and thus a BSR message has to be reported to the base station at this time T4, but thus the buffer occupancy changes frequently around the threshold (in this case the lower limit). If the BSR message occurs each time, only the waste of reverse traffic resources can be brought.

Therefore, it has a dormant time (Ts) to prevent this.

That is, after the BSR message is reported at an arbitrary time T3, the BSR message is not reported even if the occupancy of the buffer exceeds the lower limit within the idle time Ts.

This rest time Ts can be similarly applied to an upper limit value.

In addition, the idle time Ts may be set to be the same for the upper limit value and the lower limit value, or may be set to different values for the upper limit value and the lower limit value.

Therefore, after the BSR message reporting near the threshold, even if the BSR message reporting event occurs within a predetermined time Ts, this is ignored, and this control unnecessarily frequently generates and reports the BSR message, and thus reverse traffic. Unnecessary occupation of the channel can be prevented.

7 shows the BSR message structure of the present invention, and illustrates the field and the length of the field.

The Message ID is set to '0x02' and becomes information for confirming this BSR message.

Report Reason refers to the reason why BSR message occurred. '0x0' means periodic transmission, '0x1' means that the buffer occupancy exceeds the upper limit, and '0x2' indicates that the buffer occupancy falls below the lower limit. Each means.

If the reason for reporting is not periodic transmission ('0x0'), that is, when the buffer occupancy exceeds the upper limit or falls below the lower limit, only the reason for the report is reported, and therefore the message ID and the reason for the report (Report Reason = '0x1'). Or '0x2') is configured as a message and transmitted to the base station.

However, if the reason for reporting is periodic transmission, the following fields are additionally configured to transmit the BSR message.

In other words, for periodic transmission, buffer occupancy (BufferOccupancy), average buffer occupancy (AvgBufferOccupancy), buffer occupancy variation (BufferOccupancyVariance), average delay time (AvgDelay), maximum transmission delay time (MaximumDelay), average reverse traffic channel transmission rate (AvgTxRate), the maximum reverse traffic channel transmission rate (MaximumTxRate), and the number of reductions during the observation period (NumReduction) are further included in the message field and reported to the base station through the reverse traffic channel.

The buffer occupancy represents the data occupancy in the buffer at the time the BSR message is written, the average buffer occupancy represents the average buffer occupancy during the BSR message creation period (ReportInterval), and the distribution of buffer occupancy represents the distribution of data occupancy in the buffer. .

The average delay time is the average of the delays experienced by the packets (data) stored in the buffer during the BSR message writing cycle, and the maximum transmission delay represents the largest transmission delay among the delays experienced by the packets stored in the buffer during the BSR message writing cycle. .

The average reverse traffic channel transmission rate is an average value of the reverse traffic channel transmission rates during the BSR message creation period, and the maximum reverse traffic channel transmission rate is the maximum transmission rate value among the transmission rates of the reverse traffic channel during the BSR message creation period.

The number of times of reducing the transmission rate in the BSR message writing cycle indicates how many times the terminal reduced the transmission rate to the base station in the BSR message writing cycle.

Referring to FIG. 7, 8 bits are allocated to the message ID, and 4 bits are allocated to the report reason.

Then, 22 bits were allocated to the buffer occupancy amount and the average buffer occupancy amount, respectively, and 10 bits were allocated to the distribution of the buffer occupancy amount.

The average delay time, the maximum transmission delay time, the average reverse traffic channel transmission rate, and the maximum reverse traffic channel transmission rate are assigned 16 bits, respectively, to insert a time value.

In the BSR message writing cycle, 10 bits are allocated to the number of times the transmission speed is reduced, and reserved bits are reserved.

As described above, in order for the terminal to report the BSR message to the base station, the terminal needs to know the BSR message writing period (ReportInterval), the upper and lower limit values of the buffer occupancy amount, and the idle time Ts described in FIG.

This information is processed by sending a BSR parameter message from the base station to the terminal.

That is, the base station sends a BSR parameter message to the terminal, and the terminal analyzes the BSR parameter message to set the BSR message writing interval for the RLP buffer, the upper and lower limit values of the buffer occupancy, and the idle time Ts and based on these values. Observe the RLP buffer.

8 illustrates the structure of a BSR parameter message.

Message ID (MessageID) is information for confirming this BSR parameter message and allocated 8 bits.

The BSR message writing interval (ReportInterval) determines how many times the terminal composes and transmits the BSR message, and allocates 16 bits and records the time value.

The upper limit of the buffer occupancy value (UpperLimit) is allocated 22 bits as the maximum threshold value for determining whether to transmit the BSR message according to the data occupancy amount in the buffer, and when the data occupancy in the RLP buffer of the terminal exceeds this value, it is considered as an emergency situation and Regardless, send BSR messages (including ID and reason only).

Lower limit of buffer occupancy value (LowerLimit) is allocated 22 bits as the minimum threshold value of BSR message transmission decision according to data occupancy amount in buffer.If the data occupancy in RLP buffer of terminal is smaller than this value, other service urgent than terminal itself is Reported as useful information to enable processing.

Therefore, when the data occupancy in the buffer is between the lower limit and the upper limit, the terminal creates and reports a BSR message for each BSR creation interval (ReportInterval) .If the buffer occupancy exceeds the upper limit or falls below the lower limit, the terminal immediately Create a BSR message to report the buffer status to the base station.

The Dormant Time is allocated 16 bits as the minimum time interval (Ts in FIG. 6) in which the BSR message is transmitted, and does not perform the BSR message report within this Ts from the time when the BSR message is reported. This prevents unnecessary BSR message creation and reporting even if there is a frequent buffer occupancy change near the threshold, thereby preventing the occupancy of reverse traffic channels.

The BSR parameter message also has a reserved bit reserved.

The BSR parameter message as shown in FIG. 8 is prepared by the base station and transmitted to each terminal through the forward link, and each terminal checks the message ID and checks the contents of each field below it to write a BSR message to the base station, According to the threshold and idle time for observing the buffer occupancy, the BSR message of FIG. 7 is prepared and transmitted to the base station through the reverse traffic channel.

The BSR message and the BSR parameter message are managed by a reverse traffic channel MAC protocol. This protocol carries the generated BSR message on the reverse traffic channel and transmits the BSR parameter message on the control channel or the forward traffic channel.

The present invention reports the buffer status of a terminal to a base station in a high-speed wireless data communication (HDR) system, and based on this, the base station can accurately determine and control the status of the terminal to adjust the transmission rate for the reverse traffic channel. This can prevent congestion.

In addition, it is possible to guarantee the service quality according to the type and priority of the service.

Claims (10)

A buffer status report message (BSR message) when reporting a RLP (Radio Link Protocol) buffer status of a terminal for controlling reverse traffic channel to the terminal by a base station in a high speed wireless data communication (HDR) system; At least (a). Message ID, (b). If there is a report reason field and the report reason is due to periodic transmission, (c). Current buffer occupancy, (d). Average buffer occupancy, (e). Variance in buffer occupancy, (f). Average latency of data in the buffer, (g). Maximum transmission delay time of data during the observation period, (h). Average reverse traffic channel rate, (i). Maximum reverse traffic channel transmission rate, (j). A buffer status report message of a high speed wireless data communication (HDR) terminal, characterized in that it comprises a number of times of reducing the transmission rate during the observation period. 2. The high-speed radio according to claim 1, wherein when the report reason is excessive or too low based on the predetermined amount of buffer occupancy, the BSR message includes only a message ID and a report reason field which records the excessive or underestimation. Buffer status report message of the data communication (HDR) terminal. In order to control the creation and transmission of the BSR message from the base station to the terminal so that the terminal reports the BSR message to the base station, the BSR parameter message is transmitted from the base station to the terminal, wherein the BSR parameter message is sent; (a). Message ID, (b). Cycle of writing BSR messages, (c). A threshold for determining excessive and underestimated RLP buffer occupancy, (d). A buffer status report parameter message of a high speed wireless data communication (HDR) terminal, characterized in that it comprises an idle time when a BSR message is created by a threshold. 4. The buffer status report parameter message of a high speed wireless data communication (HDR) terminal according to claim 3, wherein the dwell time is set to the same or different value for each of the thresholds for determining whether the RLP buffer occupancy is excessive or underestimated. . Transmitting a BSR parameter message as BSR message creation control information through a forward link in a high-speed wireless data communication (HDR) system base station; decoding the BSR parameter message at a terminal; state of an RLP buffer according to the decryption result at a terminal And observing and writing the observation result into a BSR message and transmitting the result to a base station through a reverse link. 6. The method of claim 5, wherein the BSR parameter message is transmitted to a terminal through a control channel or a forward traffic channel of a forward link. 6. The method of claim 5, wherein the BSR message is transmitted to a base station through a reverse traffic channel of a reverse link. 6. The method of claim 5, wherein the BSR parameter message is (a). Message ID, (b). Cycle of writing BSR messages, (c). A threshold for determining excessive or underestimation of RLP buffer occupancy, (d). A method of transmitting a buffer status report message of a high speed wireless data communication (HDR) terminal, comprising: a down time at the time of writing a BSR message by a threshold value. 9. The method of claim 5 or 8, wherein the BSR message is (a). Message ID, (b). Reason for reporting, (c). Current buffer occupancy, (d). Average buffer occupancy, (e). Variance in buffer occupancy, (f). Average latency of data in the buffer, (g). Maximum transmission delay time of data during the observation period, (h). Average reverse traffic channel rate, (i). Maximum reverse traffic channel transmission rate, (j). A method of transmitting a buffer status report message of a high speed wireless data communication (HDR) terminal, characterized in that it comprises a number of times of reducing the transmission rate during the observation period. 10. The method of claim 9, wherein if the reason for reporting is due to excessive or excessive buffer occupancy, the terminal indicates (a) in the BSR message. Message ID, and (b). A method of transmitting a buffer status report message of a high speed wireless data communication (HDR) terminal, characterized in that a BSR message is transmitted using only two fields of a report reason recorded only if the buffer occupancy is excessive or excessive.