KR20100132418A - Apparatus and method for generating buffer status information of user equipment in wireless communication system - Google Patents

Abstract

PURPOSE: An apparatus and a method for generating buffer status information of a user equipment in a wireless communication system are provided to extend the durability of a battery by preventing unnecessary forward control channel monitoring in a terminal. CONSTITUTION: A base station(510) transmits a setting message for setting a logic channel X to a terminal(505), and allocates semi-permanent transmission resources to the terminal. The terminal transfers the data generated in the logic channel X to the base station through the semi-permanent transmission data, and a base station releases the allocated semi-permanent transmission resources. The terminal transfers buffer state report information to the base station.

Description

A method for generating buffer status report information of a terminal in a wireless communication system and an apparatus therefor {APPARATUS AND METHOD FOR GENERATING BUFFER STATUS INFORMATION OF USER EQUIPMENT IN WIRELESS COMMUNICATION SYSTEM}

The present invention relates to a method and apparatus for reporting a buffer status by a terminal in a wireless communication system.

In general, a wireless communication system has been developed for the purpose of providing communication while securing user mobility. Such a wireless communication system has reached a stage capable of providing high-speed data communication service as well as voice communication due to the rapid development of technology.

Recently, one of the next generation wireless communication systems, 3GPP is working on specifications for the Long Term Evolution (LTE) system. LTE is a technology that implements high-speed packet-based communication with a transmission rate of up to 100 Mbps higher than the currently provided data rate with a goal of commercialization in 2010. To this end, various methods are discussed. For example, a method of simplifying a network structure to reduce the number of nodes located on a communication path or a method of bringing wireless protocols as close to the wireless channel as possible is discussed.

On the other hand, the data service, unlike the voice service, is determined according to the amount of data to be transmitted and the channel conditions and resources that can be allocated. Therefore, in the wireless communication system, management such as allocating transmission resources is performed in consideration of the amount of resources to be transmitted by the scheduler, the channel situation, and the amount of data. This is the same in the LTE system, which is one of the next generation mobile communication systems, and a scheduler located in a base station manages and allocates radio transmission resources.

In the wireless communication system, data transmission is classified into forward transmission and reverse transmission according to the transmission direction of data. Forward transmission means the direction from the base station to the terminal, the reverse transmission means the direction from the terminal to the base station. In the forward direction, the base station can accurately determine the amount of data to be transmitted. Therefore, the scheduler can perform the scheduling smoothly because the channel condition, the amount of resources, and the amount of data to be transmitted can be accurately identified. However, the assignment of the uplink radio transmission resource is difficult in the uplink transmission in that the scheduler may be performed in a state in which the scheduler does not accurately identify the buffer status of the terminal.

In the LTE system, the UE reports the buffer status to the base station using the buffer status report control element. Since the buffer status report control information is transmitted only when a specific condition is satisfied, the base station does not always accurately recognize the buffer status of the terminal. For example, when new data is generated in the buffer of the terminal, if the priority of the newly generated data is higher than that of the previously stored data, the terminal generates buffer status control information and transmits the buffer status control information to the base station. If the condition of generating the buffer status reporting control information is applied to a service that periodically generates a certain size of data such as Voice over Internet Protocol (VoIP), the terminal needs to monitor the forward control channel for a longer time than necessary. Cause.

An object of the present invention is to propose a method and apparatus for preventing battery life from being reduced due to unnecessary forward control channel monitoring of a terminal running a service that periodically generates data of a certain size, such as Voice over Internet Protocol (VoIP). do.

In the wireless communication system of the present invention for solving the above problems, the method for setting buffer status report information of a terminal includes receiving a logical channel setting message including identifier information of a logical channel group to which a logical channel belongs from a base station, the base station And determining whether or not the semi-persistent transmission resource is allocated to the logical channel, and, if it is determined that the semi-persistent transmission resource is allocated, setting not to generate buffer status report information. The logical channel establishment message may further include indicator information indicating that the logical channel does not belong to the logical channel group when a semi-persistent transmission resource is allocated to the logical channel. The setting may further include setting a logical channel group identifier of the logical channel to 'null'.

In addition, in the wireless communication system of the present invention, when it is determined that the semi-persistent transmission resource is not allocated, the method for setting buffer status report information of the terminal sets the logical channel group identifier of the logical channel as the received identifier information, the logical channel. If the data generated at has a higher priority than the currently stored data, the terminal further comprises the step of generating buffer status report information.

In addition, in the wireless communication system of the present invention for solving the above problems, the terminal device receives a logical channel setting message including the identifier information of the logical channel group belonging to the logical channel, and transmits the buffer status report information to the base station And a transmitter / receiver, a control channel processor to determine whether the semi-persistent transmission resource is allocated or released from the base station, and a buffer status report information generator that does not generate buffer status report information when it is determined that the semi-persistent transmission resource is allocated. It is characterized by. The setting may further include setting a logical channel group identifier of the logical channel to 'Null'. In addition, when it is determined that the semi-persistent transmission resource is allocated, the control channel processor sets the logical channel group identifier of the logical channel to 'Null'.

In addition, when it is determined that the terminal device has not been allocated the semi-persistent transmission resource in the wireless communication system of the present invention, the control channel processor sets the logical channel group identifier of the logical channel as the received identifier information and the buffer status report information. The generator generates buffer status report information when the data generated in the logical channel has a higher priority than data currently stored.

According to the method and apparatus for generating the buffer status report information of the terminal in the wireless communication system of the present invention, the terminal can prevent unnecessary forward control channel monitoring to extend the battery life of the terminal.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that like elements are denoted by like reference numerals as much as possible. Further, the detailed description of well-known functions and constructions that may obscure the gist of the present invention will be omitted.

Also, the terms and words used in the present specification and claims should not be construed to be limited to ordinary or dictionary meanings, and the inventor is not limited to the concept of terms in order to describe his invention in the best way. It should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be properly defined.

Prior to explaining the present invention, the LTE system will be described in more detail with reference to FIGS. 1 and 2.

1 is a diagram illustrating the structure of an LTE system.

Referring to FIG. 1, next-generation radio access networks (hereinafter referred to as E-RANs) 110 and 112 are next-generation base stations (hereinafter referred to as Evolved Node Bs, hereinafter referred to as ENBs or Node Bs) 120 and 122. , 124, 126, and 128 and a higher node (called an Access Gateway) 130 and 132 are simplified. The user equipment (hereinafter referred to as UE) 101 is connected to the Internet Protocol (hereinafter referred to as IP) network by the E-RANs 110 and 112.

The ENBs 120 to 128 correspond to existing Node Bs of the UMTS system. The ENB is connected to the UE 101 by a radio channel and performs a more complicated role than the existing Node B. In LTE, all user traffic, including real-time services such as Voice over IP (VoIP) over the Internet protocol, is serviced through a shared channel, which requires a device that collects the UE's context information and schedules it. 120 to 128). One ENB typically controls a number of cells. In order to realize a transmission rate of up to 100 Mbps, LTE uses Orthogonal Frequency Division Multiplexing (OFDM) as a radio access technology in a bandwidth of up to 20 MHz. In addition, an adaptive modulation & coding (AMC) scheme that determines a modulation scheme and a channel coding rate according to the channel state of the terminal is applied.

2 is a diagram illustrating a random access procedure in an LTE mobile communication system.

Referring to FIG. 2, the wireless protocol of the LTE system includes packet data convergence protocol (PDCP) layers 205 and 240, radio link control (RLC) layers 210 and 235, and medium access control (MAC) layer 215. 230), and PHY (Physical) layer (220, 225). In addition, the data input to the protocol entity based on the transmission is referred to as a service data unit (SDU), and the output data is referred to as a protocol data unit (PDU).

The PDCP layers 205 and 240 are in charge of IP header compression / restore and the like, and the RLC layers 210 and 235 reconfigure the PDCP PDU to an appropriate size to perform an Automatic Repeat Request (ARQ) operation. The MAC layers 215 and 230 are connected to devices of several RLC layers 210 and 235 configured in one terminal, and multiplex RLC PDUs to MAC PDUs and demultiplex RLC PDUs from MAC PDUs. In addition, the PHY layers 220 and 225 perform channel coding and modulation on upper layer data, make an OFDM symbol, and transmit it to a wireless channel, or demodulate, channel decode, and transmit an OFDM symbol received through a wireless channel to a higher layer. do.

Data requiring similar quality of service is transmitted and received through one logical channel, and the logical channel is specifically a PDCP device and an RLC device configured to provide the quality of service. Typically, one logical channel is set per one service, and an appropriate priority is set per logical channel according to the required quality of service of the service. The priority is an index indicating the importance of data generated in a corresponding logical channel and plays a role in reporting a buffer status.

Any logical channel can belong to a logical channel group. The logical channel group is a unit of the buffer status report in the buffer status report control information, and up to four logical channel groups may be configured in one terminal, and one logical channel group may include a plurality of logical channels.

3 is a diagram illustrating the structure of buffer status report information.

Referring to FIG. 3, the size of buffer status report information is 1 byte or 3 bytes. The buffer status report information of one byte is called short buffer status report information, and is composed of a 2-bit Logical Channel Group (LCG) identifier 305 and 6-bit buffer size information 310. The LCG identifier 305 contains an identifier of the LCG for which buffer size information is reported. The buffer size information 310 stores information indicating the total sum of data stored in all logical channels included in the LCG.

The 3-byte buffer status report information is called long buffer status report information, and is composed of four 6-bit buffer size information (315, 320, 325, and 330). The first buffer size information 315 includes information indicating the total sum of data stored in all logical channels included in the LCG having the LCG identifier of 0, and the second buffer size information 320 contains the LCG having the LCG identifier of 1. The third buffer size information 325 includes information indicating the sum of data stored in all the logical channels included in the LCG having the LCG identifier 2, and the information indicating the sum of the data stored in all the logical channels included. In the fourth buffer size information 330, information indicating the total sum of data stored in all logical channels included in the LCG having the LCG identifier of 3 is stored.

If there is one LCG to report the buffer status, the short buffer status reporting information is used. If there is more than one LCG to report the buffer status, the long buffer status reporting information is used.

In the LTE system, a semi-permanent transmission resource allocation method (SPS) is used to efficiently provide a service in which small packets are regularly generated, such as a voice service. In the SPS, a predetermined transmission resource is periodically given to the terminal without additional transmission resource allocation information. The allocation period of the transmission resource and the size of the transmission resource are appropriately set according to the period and size of the VoIP packet.

4 is a diagram illustrating an example of semi-persistent transmission resources, scheduling request transmission, and VoIP packet generation.

Referring to FIG. 4, the base station may allocate a semi-persistent transmission resource having a 20 msec period to a terminal that drives a VoIP service in which a voice packet is generated every 20 msec. For example, the semi-persistent transmission resource is allocated such as (x + 20) msec, (x + 40) msec, (x + 60) msec, and the like, and a voice packet is allocated between semi-persistent transmission resource allocation points as shown by reference numerals 420 and 425. Can occur in

On the other hand, logical channels for VoIP are usually given high priority. Since the voice packet is transmitted by the semi-permanent transmission resource before the next voice packet is generated, there is a high possibility that no data is stored in the logical channel for VoIP at the time of the voice packet generation. Therefore, the generation of the voice packet is likely to cause the generation of the buffer status report information because it satisfies the condition of the generation of higher priority data than the data stored in the current terminal.

When the buffer status report information is generated, the terminal transmits 1-bit information called a scheduling request to the base station and monitors the forward control channel until the reverse transmission resource is allocated. The scheduling request may be transmitted through a transmission resource periodically arriving in advance to the terminal. If the temporal location of the scheduling request 430 is between the voice packet generation point 420 and the semi-permanent transmission resource allocation point 410, the terminal discontinuously receives the transmission of the scheduling request from the time point at which the semi-permanent transmission resource is allocated. The Active Time 435 of the reception (DRX) operation must be maintained, which leads to unnecessary waste of power. For reference, the active time of the DRX operation means a period during which the UE should monitor the forward control channel, and the UE should leave the receiver on during the active time.

The above-described problem may be determined to be solved by specifying that the buffer status report control information does not occur for a service that is likely to use semi-persistent transmission resources because packets of a certain size are generated at regular intervals such as VoIP. However, in this case, another problem arises that it is difficult to switch from the silent period of VoIP to talkspurt. Talk spurt is a period in which a voice packet occurs at a 20 msec period, and corresponds to a period in which a user speaks. Silencer is a period of time that the user does not speak, and packets much smaller than voice packets occur every 160 msec.

The base station normally allocates semi-persistent transmission resources only in the talk spurt interval, releases the semi-persistent transmission resources upon recognizing that the VoIP session is switched to silence, and allocates transmission resources to the terminal assuming that small packets occur every 160 msec from the terminal. . That is, a transmission resource for transmitting a packet of a predetermined size is allocated every 160 msec. The transition from silencer to talk spurt can be made at any time. That is, voice packets may start to occur at a period of 20 msec at an unexpected time point of the base station. When switched to talk spurt, it is necessary for the base station to quickly recognize this and allocate a new semi-persistent transmission resource to the terminal. The base station recognizes this by receiving the buffer status report control information transmitted by the terminal. If the packet generated in the VoIP logical channel is configured not to generate the buffer status report control information, the base station switches to talk spurt. There is no way of recognizing, which causes a problem of increasing the transmission delay of the voice packet.

In order to solve the above problem, the packet generated in the VoIP logical channel does not generate buffer status report control information while the terminal operates as talk spurt, and the packet generated in the VoIP logical channel is operated while operating in the silencer. A logical channel setting mode of a terminal for generating buffer status report control information is presented.

In the present invention, the base station controls the terminal to operate in the above-described logical channel configuration mode by using the 1-bit indicator information in the process of setting an arbitrary logical channel. That is, the base station transmits an indicator including logical channel configuration mode information to the terminal to indicate whether the logical channel is conditionally included in any logical channel group. Conditionally including any logical channel in any logical channel group means that the logical channel is included in the logical channel group only when a predetermined condition is met, and the condition may be whether to set a semi-persistent transmission resource. .

In order to efficiently use the semi-persistent transmission resources, the base station allocates semi-persistent transmission resources to the terminal only during talk spurt and releases the semi-persistent transmission resources in the silent period. Therefore, whether or not the semi-persistent transmission resources are allocated may be used as a basis for determining whether the terminal is in the talk spurt interval. The fact that any logical channel does not belong to a logical channel group means the data of the logical channel has no influence on the buffer status report. Therefore, even if new data is generated in the logical channel, the buffer status report information does not occur.

The terminal operates as belonging to no logical channel while the semi-persistent transmission resource is allocated to the logical channel in which the 1-bit indicator is set to '1', and belongs to the indicated logical channel while the semi-persistent transmission resource is not allocated. To work.

As such, while the semi-persistent transmission resource is allocated, the logical channel does not belong to any logical channel group so that the buffer status report information does not occur due to the data even if data is periodically generated in the logical channel. Also, while the semi-persistent transmission resource is not allocated, the logical channel belongs to a specific logical channel group so that data is generated in the logical channel and buffer status report information is generated when the data meets a predetermined condition. By receiving the buffer status report information, it is possible to recognize the transition from the silencer to the talk spurt.

<First Embodiment>

5 is a diagram illustrating a resource allocation method according to a first embodiment of the present invention.

Referring to FIG. 5, in step 515, the base station 510 transmits a configuration message for configuring logical channel X to the terminal 505. The configuration message may include identifier information (LCG Y) of logical channel group Y to be included in logical channel X and indicator information of 1 bit.

The indicator information indicates whether to operate in the above-described logical channel configuration mode, and whether the logical channel always belongs to the logical channel group (when the indicator information is '0') or the semi-permanent transmission resource is not assigned to the logical channel. It only indicates whether it belongs to a logical channel group (when indicator information is '1'). That is, whether or not a logical channel belongs to a logical channel group affects whether buffer status report information is generated.

For example, if a logical channel does not belong to a logical channel group, buffer status report information is not generated even if data is generated in the logical channel. Therefore, when the logical channel X does not belong to the logical channel group and the semi-persistent transmission resource is allocated, even if data is generated in the logical channel X, the buffer status report information is not generated and the scheduling request is not transmitted.

In addition, when data occurs in logical channel X when no semi-persistent transmission resource is allocated, buffer status report information is generated when the condition that the data generated in logical channel X has higher priority than the currently stored data is satisfied. Means.

In step 520, the base station 510 allocates the semi-persistent transmission resources to the terminal 505. A data packet is then generated in logical channel X at step 525. Since the logical channel X does not belong to any logical channel group in the state where the semi-persistent transmission resource is allocated, the newly generated data does not generate buffer status report information.

In step 530, the terminal 505 transmits the data generated in the logical channel X to the base station 510 through the semi-persistent transmission resource. After the data generation and the reverse transmission is repeated, in step 540, the base station 510 releases the semi-persistent transmission resources allocated to the terminal 505. For example, if the base station detects that the VoIP session serviced through logical channel X has been switched from talk spurt to silencer, the semi-persistent transmission resource can be released.

Subsequently, in step 545, a data packet is generated in logical channel X. In this case, since the semi-persistent transmission resource is not allocated, the logical channel X is included in the logical channel group Y, and the terminal has a higher priority than the data stored in the predetermined condition, for example, the data generated in the logical channel X. Determine whether to generate the buffer status report information by checking whether the data has data. If only the VoIP service is running in the terminal, the data will not be stored in the terminal at the time when the data is newly generated. In step 550, the terminal 505 generates buffer status report information and transmits the buffer status report information to the base station.

6 is a flowchart illustrating an operation of a terminal according to the first embodiment of the present invention.

Referring to FIG. 6, in step 605, the terminal receives a logical channel establishment message from a base station. The logical channel configuration message includes identifier information of the logical channel group to which the logical channel belongs and indicator information indicating the logical channel configuration mode. The indicator information indicating the logical channel setting mode described above indicates whether the corresponding logical channel always belongs to the logical channel group or only if the semi-persistent transmission resource is not allocated.

In step 610, the terminal determines whether the indicator information is '1' or '0'. If the logical channel is a service in which packets of a relatively constant size occur periodically, such as VoIP, the indicator is set to '1'.

On the other hand, when the indicator is '0', the UE sets the logical channel group identifier of the logical channel to the indicated value in step 615 and indicates that the data generated in the logical channel has a higher priority than the currently stored data. If the condition is met, the buffer status report information is generated.

In addition, if the indicator is '1', the terminal sets the logical channel group identifier of the corresponding logical channel to the received value in step 620 and waits until the semi-persistent transmission resource is allocated. Since the semi-persistent transmission resource is included in the logical channel group corresponding to the identifier of the logical channel group, the terminal is buffered when the condition that the data generated in the logical channel has a higher priority than the currently stored data is satisfied. Generates status report information and sends it to the base station.

Subsequently, when the semi-persistent transmission resource is allocated in step 625, the terminal sets the logical channel group identifier of the logical channel to 'Null' in step 630. That is, the logical channel does not belong to any logical channel group and does not generate buffer status report information even when data is generated in the logical channel.

Thereafter, when the semi-persistent transmission resource is released as in step 635, the terminal sets the logical channel group identifier of the logical channel to the value indicated in the configuration message in step 640. If the logical channel group identifier of the logical channel is not 'Null', the terminal generates and transmits buffer status report information when the data generated in the logical channel satisfies the above condition. In addition, the terminal maintains the logical channel group identifier of the logical channel at the indicated value until the semi-persistent transmission resource is allocated.

7 is a block diagram illustrating a terminal device according to an embodiment of the present invention. However, it should be noted that the upper layer device is not shown in the terminal device block diagram of FIG. 7.

Referring to FIG. 7, the terminal apparatus according to the embodiments of the present invention may include a multiplexing and demultiplexing apparatus 705, a HARQ processor 710, a buffer status report information generator 715, a control channel processor 720, It includes a transceiver 725.

The buffer status report information generator 715 recognizes which logical channel group the logical channels set in the terminal belong to and monitors the buffer status of the logical channel belonging to the logical channel group. If new data is generated in the logical channel belonging to the logical channel group, and the priority of the logical channel where the data occurs is higher than the priority of the logical channels in which the data was previously stored, generate buffer status report information and control the transceiver. To send the scheduling request information.

In addition, the buffer status report information generator 715 determines whether to generate the buffer status report information, in particular with respect to the semi-persistent transmission resource allocation, for the logical channel in which the indicator information is set to '1'. In more detail, when a semi-persistent transmission resource is allocated from the base station, since the logical channel does not belong to the logical channel group, the buffer status report information is not generated even if data is generated in the logical channel. In addition, when the semi-persistent transmission resource is not allocated from the base station, since the logical channel belongs to the logical channel group, the buffer status report information is generated by determining whether the data generated in the logical channel has higher priority than the currently stored data. Determine whether or not.

The control channel processor 720 processes the forward and reverse control channels. For example, it analyzes forward control information to determine whether to schedule or not. In particular, since the semi-persistent transmission resources are allocated through the forward control channel, the control channel processor notifies the buffer status report information generation unit when the semi-persistent transmission resources are allocated or released. The transceiver 725 of the terminal is a device for transmitting and receiving MAC PDU or control information through a wireless channel. The device receives an H-ARQ packet. The hybrid-automatic repeat request (H-ARQ) processor 710 is a set of soft buffers configured to perform an H-ARQ operation and is identified by an H-ARQ process identifier. The multiplexing and demultiplexing apparatus concatenates data transmitted from several logical channels to form a MAC PDU.

Second Embodiment

8 is a flowchart illustrating an operation of a terminal according to the second embodiment of the present invention.

Embodiment 2 of the present invention provides a method and apparatus for controlling whether a regular BSR occurs in a specific logical channel according to whether a semi-persistent transmission resource is allocated.

BSR is divided into three types according to the cause.

Normal BSR: This is a BSR triggered when data having a higher priority than data currently stored by the terminal or when a predetermined timer expires. The timer is a timer for an error situation that the base station does not recognize that the terminal has data to transmit, called a BSR retransmission timer, which is different from the timer for controlling the following periodic BSR. When a regular BSR is triggered, a status report (SR) is also triggered.

Periodic BSR: A BSR triggered when a predetermined timer expires. SR is not triggered even if periodic BSR is triggered.

Padding BSR: BSR inserted in place of padding when there is extra space in the transmitting MAC PDU. Even if the padding BSR is triggered, the SR is not triggered.

Since the SR is triggered only by the regular BSR, in order to solve the problem of preventing the SR and the BSR from being triggered every time a VoIP packet occurs, a method of preventing the logical channel corresponding to the VoIP service from triggering the regular BSR can be considered. .

In the second embodiment of the present invention, in setting a logical channel corresponding to a VoIP service, the base station sets an indicator to a predetermined value in the logical channel. If the indicator is set to a predetermined value and the terminal is allocated reverse semi-persistent transmission resources, data is generated in the logical channel, and the data is higher priority than other data stored in the terminal at that time. Even if it does not trigger a regular BSR.

Referring to FIG. 8, in step 805, the terminal receives a logical channel establishment message from a base station. The logical channel establishment message includes indicator information indicating whether to allow regular BSR. The indicator information indicating whether or not to allow the normal BSR means that the regular BSR is always triggered when the data generated in the logical channel satisfies the predetermined condition, or the regular BSR only when the predetermined condition is satisfied and the semi-persistent backward transmission resource is not allocated. Indicates if it triggers.

Thereafter, the terminal determines whether the indicator information is '1' or '0' in step 810. If the logical channel is a service in which packets of a relatively constant size occur periodically, such as VoIP, the indicator is set to '1'.

On the other hand, if the indicator is '0', the terminal generates new data in the corresponding logical channel in step 815 and if the priority of the newly generated data is higher than the priority of already stored data, or the BSR retransmission timer expires, the regular BSR Trigger

In addition, if the indicator is '1', the UE checks whether the reverse semi-persistent transmission resource is allocated in step 820. If the backward semi-persistent transmission resources are allocated, the process proceeds to step 825 so that normal BSR is not generated by data generated in the logical channel. That is, even if new data is generated in the logical channel in which the indicator is set to 1 and the priority of the data is higher than that of other data already stored, the regular BSR is not triggered. At this time, even if the indicator is '1', the regular BSR is triggered when the BSR retransmission timer expires.

If the backward semi-persistent transmission resources are not allocated, the flow proceeds to step 830 to generate a normal BSR by data generated in the logical channel. That is, if new data is generated in the logical channel in which the indicator is set to 1 and the priority of the data is higher than the priority of other data already stored, the regular BSR is triggered.

The terminal repeats the operation until the logical channel is released.

On the other hand, embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

1 is a diagram illustrating a structure of an LTE mobile communication system.

2 is a diagram illustrating a random access procedure in an LTE mobile communication system.

3 is a diagram showing the structure of buffer status report information;

4 illustrates an example of semi-persistent transmission resources, scheduling request transmission, and VoIP packet generation.

5 is a diagram illustrating a resource allocation method according to the first embodiment of the present invention.

6 is a flowchart illustrating an operation of a terminal according to the first embodiment of the present invention.

7 is a block diagram illustrating a terminal device according to an embodiment of the present invention.

8 is a flowchart illustrating the operation of a terminal according to an embodiment of the present disclosure.

Claims (12)

Receiving from the base station a logical channel establishment message including identifier information of a logical channel group to which the logical channel belongs; Determining whether a semi-persistent transmission resource is allocated to the logical channel from the base station; And And determining not to generate buffer status report information when it is determined that the semi-persistent transmission resource is allocated. The method of claim 1, wherein the logical channel setup message is And the indicator information indicating that the logical channel does not belong to the logical channel group when the semi-persistent transmission resource is allocated to the logical channel. The method of claim 1, wherein the setting step And setting the logical channel group identifier of the logical channel to 'null'. The method of claim 1, If it is determined that the semi-persistent transmission resource is not allocated, setting a logical channel group identifier of the logical channel as the received identifier information;  When the data generated in the logical channel has a higher priority than the currently stored data, the terminal generates buffer status report information; generating buffer status report information of the terminal in a wireless communication system further comprising: Way. The method of claim 1, Determining whether or not a semi-persistent transmission resource is allocated to the logical channel from the base station, And determining whether a reverse semi-persistent transmission resource is allocated to the logical channel from the base station. The method of claim 5, If it is determined that the semi-persistent transmission resource is allocated, the setting of not generating the buffer status report information may include: And if it is determined that the reverse semi-persistent transmission resource is allocated, setting not to generate normal buffer status report information. A transceiver for receiving a logical channel setting message including identifier information of a logical channel group to which a logical channel belongs from a base station, and transmitting buffer status report information to the base station; A control channel processor for determining whether a semi-persistent transmission resource is allocated or released from the base station; And And a buffer status report information generator which does not generate buffer status report information when it is determined that the semi-persistent transmission resource is allocated. 8. The method of claim 7, wherein the logical channel establishment message is And an indicator information indicating that the logical channel does not belong to the logical channel group when the semi-persistent transmission resource is allocated to the logical channel. The method of claim 7, wherein the control channel processing unit If it is determined that the semi-persistent transmission resource is allocated, the terminal device in the wireless communication system, characterized in that for setting the logical channel group identifier of the logical channel to 'Null'. 8. The method of claim 7, wherein it is determined that the semi-persistent transmission resource has not been allocated. The control channel processing unit sets the logical channel group identifier of the logical channel to the received identifier information, The buffer state report information generation unit, when the data generated in the logical channel has a higher priority than the currently stored data, the terminal generates a buffer state report information in the wireless communication system, characterized in that. The method of claim 7, wherein And the control channel processor determines whether or not a reverse semi-persistent transmission resource is allocated to the logical channel from the base station. The method of claim 11, And the buffer status report information generating unit does not generate regular buffer status report information when it is determined that the backward semi-persistent transmission resource is allocated.

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