KR20090084718A - Method for performing efficient bsr(buffer status report)procedure using sps(semi-persistent scheduling)resource - Google Patents

Abstract

An efficient BSR process performing method using a previously allocated radio resource is provided to prevent the unnecessary allocation of radio resources in a base station. It is determined whether scheduling information is triggered. If the scheduling information is triggered, it is periodically determined whether the constructed resources exist. If the constructed resources does not exist, an SR process is performed.

Description

METHOOD FOR PERFORMING EFFICIENT BSR (BUFFER STATUS REPORT) PROCEDURE USING SPS (SEMI-PERSISTENT SCHEDULING) RESOURCE}

The present invention relates to a wireless communication system and a terminal for providing a wireless communication service, and to a base station in an Evolved Universal Mobile Telecommunications System (E-UMTS) or a Long Term Evolution System (LTE), which has been evolved from a Universal Mobile Telecommunications System (UMTS). The present invention relates to a method for transmitting and receiving data. In particular, when a terminal allocated with a persistent allocation radio resource requests allocation of a radio resource to a base station, the allocation time of the allocation of a continuous allocation radio resource and the start of the radio resource request process are compared. The present invention relates to a method for effectively transmitting a radio resource allocation request without equipment of a radio resource.

1 is a diagram illustrating a network structure of an Evolved Universal Mobile Telecommunications System (E-UMTS), which is a mobile communication system to which the present invention and the present invention are applied. The E-UMTS system is an evolution from the existing UMTS system and is currently undergoing basic standardization in 3GPP. The E-UMTS system may be referred to as a Long Term Evolution (LTE) system.

E-UMTS networks can be largely divided into E-UTRAN and CN. The E-UTRAN is a UE (hereinafter abbreviated as UE) and a base station (hereinafter abbreviated as eNode B), a serving gateway (abbreviated as S-GW) located at the end of the network and connected to an external network. It consists of a Mobility Management Entity (hereinafter referred to as MME) that manages the mobility of. One or more cells may exist in one eNode B.

2 and 3 illustrate a structure of a radio interface protocol between a terminal and a base station based on the 3GPP radio access network standard. The wireless interface protocol consists of a physical layer, a data link layer, and a network layer horizontally, and vertically a user plane and control for data information transmission. It is divided into a control plane for signal transmission. The protocol layers are based on the lower three layers of the Open System Interconnection (OSI) reference model, which are well known in communication systems. L1 (Layer 1), L2 (Layer 2), and L3 (Layer 3) It can be divided into.

Hereinafter, each layer of the wireless protocol control plane of FIG. 2 and the wireless protocol user plane of FIG. 3 will be described.

The physical layer, which is the first layer, provides an information transfer service to an upper layer by using a physical channel. The physical layer is connected to the upper medium access control layer through a transport channel, and data between the medium access control layer and the physical layer moves through the transport channel. Then, data moves between different physical layers, that is, between physical layers of a transmitting side and a receiving side through a physical channel.

Medium access control (hereinafter referred to as MAC) of the second layer provides a service to a radio link control layer, which is a higher layer, through a logical channel. The radio link control layer (hereinafter referred to as RLC) layer of the second layer supports reliable data transmission. The PDCP layer of the second layer is a header compression that reduces the IP packet header size, which is relatively large and contains unnecessary control information, for efficient transmission in a low bandwidth wireless section when transmitting an IP packet such as IPv4 or IPv6. Compression) function. The PDCP layer is also used to perform encryption of C-plane data, for example RRC messages. PDCP also performs encryption of U-plane data.

The radio resource control layer (hereinafter abbreviated as RRC) layer located at the bottom of the third layer is defined only in the control plane, and the configuration and resetting of radio bearers (abbreviated as RB) are performed. It is responsible for the control of logical channels, transport channels and physical channels in relation to configuration and release. In this case, RB means a service provided by the second layer for data transmission between the terminal and the E-UTRAN.

The following is a detailed description of the RACH (Random Access Channel). The RACH channel is used for transmitting a short length of data upward. In particular, the RACH channel is used when there is a signaling message or user data to be transmitted upward by a terminal that has not been allocated a dedicated radio resource. Or, it may be used when the base station instructs the terminal to perform the RACH process.

The following is a description of the random access procedure provided by the LTE system. The random access process provided by the LTE system is classified into a contention based random access procedure and a non-contention based random access procedure. The division between the contention-based random access process and the contention-free random access process is determined according to whether the UE directly selects a random access preamble used in the random access process or the base station.

In the contention-free random access procedure, the terminal uses a random access preamble allocated by the base station directly to the base station. Therefore, when the base station allocates the specific random access preamble only to the terminal, the random access preamble uses only the terminal, and other terminals do not use the random access preamble. Therefore, since a 1: 1 relationship is established between the random access preamble and the terminal using the random access preamble, there can be no collision. In this case, as soon as the base station receives the random access preamble, the base station may know the terminal that has transmitted the random access preamble.

On the contrary, in the contention-based random access process, since a random access preamble can be randomly selected and transmitted by the UE, there is a possibility that a plurality of terminals always use the same random access preamble. Therefore, even if a base station receives a certain random access preamble, it is not possible to know which UE transmits the random access preamble.

In general, the UE may perform a random access procedure in the following cases. 1) When the terminal does not have an RRC connection to the base station (initial access) 2) When the terminal is initially connected to the target cell during the handover process 3) When requested by the command of the base station 4 5) Radio link failure or handover when uplink data occurs in a situation in which uplink time synchronization is not correct or a designated radio resource used for requesting a radio resource is not allocated. In case of recovery in case of handover failure.

Based on the above description, Figure 4 shows the operation of the terminal and the base station in the contention-based random access process.

First, in contention-based random access, the UE may randomly select one random access preamble from a set of random access preambles indicated by system information or a handover command, and transmit the random access preamble. The PRACH resource is selected and transmitted to the base station. (Step 1) The preamble at this time is called RACH MSG 1.

After the terminal transmits the random access preamble as described above, the terminal attempts to receive a response to its random access preamble within the random access response reception window indicated by the system information or the handover command (step 2). In more detail, the random access response information is transmitted in the form of a MAC PDU, and the MAC PDU may be delivered in a physical downlink shared channel (PDSCH). In addition, the physical downlink control channel (PDCCH) is also delivered in order for the terminal to properly receive the information delivered to the PDSCH. That is, the PDCCH may include information of a terminal that should receive the PDSCH, frequency and time information of radio resources of the PDSCH, a transmission format of the PDSCH, and the like. In this case, if the UE succeeds in receiving the PDCCH coming to the UE, the UE properly receives a random access response transmitted to the PDSCH according to the information of the PDCCH. The random access response includes a random access preamble identifier (ID), a UL Grant (uplink radio resource), a Temporary C-RNTI (temporary cell identifier), and a Timing Advance Command (or Time Alignment Command) (time synchronization correction value). do. The reason why the random access preamble identifier is required is that since one random access response may include random access response information for one or more terminals, which terminal the UL Grant, Temporary C-RNTI and Timing advance command information are valid for? It is to inform. The random access preamble identifier corresponds to the random access preamble selected by the user in step 1.

When the terminal receives a random access response valid for the terminal, the terminal processes the information included in the random access response. That is, the terminal applies a timing advance command and stores a Temporary C-RNTI. In addition, by using the UL Grant, data stored in the buffer of the terminal or newly generated data is transmitted to the base station (step 3). At this time, among the data (hereinafter also referred to as message 3) included in the UL Grant, an identifier of the terminal must be included. This is because, in the contention-based random access process, it is not possible to determine which terminals perform the random access process in the base station, since the terminal needs to be identified for future collision resolution. Here, there are two methods for including the identifier of the terminal. In the first method, if the UE already has a valid cell identifier assigned to the cell before the random access procedure, the UE transmits its cell identifier through the UL Grant. On the other hand, if a valid cell identifier has not been allocated before the random access procedure, the terminal transmits its own unique identifier (eg, S-TMSI or Random Id). In general, the unique identifier is longer than the cell identifier. In step 3, if the UE transmits data through the UL Grant, the UE starts a contention resolution timer.

After the terminal transmits data including its identifier through the UL Grant included in the random access response, the terminal waits for instructions from the base station to resolve the collision. That is, it attempts to receive the PDCCH to receive a specific message (step 4). Here, there are two methods for receiving the PDCCH. As mentioned above, when its identifier transmitted through the UL Grant is a cell identifier, it attempts to receive a PDCCH using its cell identifier, and when the identifier is a unique identifier, it is included in the random access response. Attempt to receive the PDCCH using the Temporary C-RNTI. Then, in the former case, if the PDCCH (hereinafter referred to as message 4) is received through its cell identifier before the conflict resolution timer expires, the UE determines that the random access procedure has been normally performed, and randomly Terminate the access process. In the latter case, if the PDCCH is received through the temporary cell identifier before the conflict resolution timer expires, the data (hereinafter referred to as message 4) transmitted by the PDSCH indicated by the PDCCH is checked. If the unique identifier is included in the content of the data, the terminal determines that the random access procedure has been normally performed, and ends the random access procedure. Here, the message or MAC PDU received in this fourth step is often called RACH MSG 4.

The following describes a method for the UE to receive data in the downward direction in the LTE system. 5 is an exemplary diagram illustrating a radio resource allocation according to the prior art.

In the down direction, physical channels are divided into two types, which are a physical downlink control channel (PDCCH) and a physical downlink shared channel (PDSCH). PDCCH is not directly related to transmission of user data, and control information necessary for operating a physical channel is transmitted. In the simplest case, the PDCCH may be used to control other physical channels. In particular, the PDCCH is used to transmit information necessary for the UE to receive the PDSCH. At any particular point in time, information is transmitted through the PDCCH, such as which data is transmitted using which specific frequency band, for which UE, what size of data is transmitted, and the like. Accordingly, each UE receives a PDCCH at a specific TTI, checks whether the data to be received is transmitted through the PDCCH, and if it is informed that the data to be received is transmitted, it is indicated by the PDCCH. PDSCH is further received using information such as frequency. Data of the PDSCH is transmitted to which UE (one or a plurality of UEs), and information on how the UEs should receive and decode the PDSCH data includes physical channel physical downlink control channel (PDCCH). It can be said to be included in the transmission.

For example, in a specific subframe, radio resource information A (e.g., frequency position) and transmission format information B (e.g., transport block size, modulation and coding information, etc.) are RNTI (Radio Network). Assume that CRC is masked as a Temporary Identity and transmitted through PDCCH. One or more terminals in the cell monitor the PDCCH using their own RNTI information. In the above assumption, a CRC error does not occur when the terminal decodes the PDCCH with an RNTI of C. Will not. Accordingly, the terminal receives the data by decoding the PDSCH using the transmission type information B and radio resource information A. On the other hand, in the above assumption, a CRC error occurs when the PDCCH is decoded in a terminal that does not have an RNTI of C. Therefore, the terminal does not receive the PDSCH.

In this process, a radio network temporary identifier (RNTI) is transmitted to inform UEs about which radio resources are allocated through each PDCCH. There are a dedicated RNTI and a common RNTI. The dedicated RNTI is assigned to one terminal and used for transmitting and receiving data corresponding to the terminal. The dedicated RNTI is allocated only to a terminal whose information is registered in the base station. On the contrary, the common RNTI is used when terminals that do not have a dedicated RNTI assigned because information is not registered in the base station exchange data with the base station, or transmit information commonly applied to a plurality of terminals such as system information.

As mentioned above, two axes constituting the E-UTRAN are a base station and a terminal. The radio resource in one cell is composed of an uplink radio resource and a downlink radio resource. The base station is responsible for allocating and controlling uplink and downlink radio resources of the cell. That is, the base station determines which radio resource is used by which terminal at any moment. For example, after 3.2 seconds, the base station may determine that the frequency 100Mhz to 101Mhz is allocated to user 1 for downlink data transmission for 0.2 seconds. After the base station makes this determination, the base station notifies the corresponding terminal of the fact so that the terminal receives downlink data. Similarly, the base station determines when and which terminal to use to transmit data upwards using what radio resources, and the base station informs the terminal of this determination, so that the terminal transmits data using the radio resources during the time. Do it.

Unlike the prior art, the base station dynamically manages radio resources, thereby enabling efficient use of radio resources. The prior art allows one terminal to continue using one radio resource while the call is connected. This is particularly unreasonable considering that many services in recent years are based on IP packets. This is because most packet services do not generate packets steadily during the connection time of the call, but there are many intervals in which nothing is transmitted during the call. In this case, it is inefficient to continuously allocate radio resources to one UE. In order to solve this problem, the E-UTRAN system uses a method of allocating radio resources to the terminal in the same manner as above only when there is service data when the terminal is needed.

The following is a description of the semi-persistent scheduling method or the semi-permanent radio resource allocation method. In general, when a terminal transmits data to a base station, 1) requesting a base station for radio resources required for transmission of generated data by a terminal, and 2) a base station transmits a control signal according to a radio resource request of the terminal. Allocating the radio resources through the 3, and transmitting the data to the base station through the radio resources allocated by the terminal. However, in the VoIP service, since small packets of a certain size are frequently transmitted regularly, considering such characteristics, an efficient radio resource allocation technique can be applied. That is, the semi-permanent radio resource allocation technique is one example of the radio resource allocation technique optimized for VoIP service. This method omits the transmission of information regarding the allocation of radio resources. In more detail, when the VoIP service is started, the packet size and period of the RTP are determined in advance, and radio resources are permanently allocated. Accordingly, the terminal may perform a process of directly transmitting data without the request step of the radio resource and the step of allocating the radio resource according to the setting of the radio resource. That is, in the persistent radio resource allocation method, it is not necessary to transmit radio resource allocation information through the PDCCH. That is, even though the terminal does not receive the PDCCH every time, the terminal periodically receives a specific radio resource or transmits the radio signal using a specific radio resource according to the preset information. On the contrary, the dynamic radio resource allocation method (Dynamic Scheduling) is a method of notifying a radio resource to be received or transmitted by the terminal every time.

The base station may optionally set a dedicated radio resource request channel (D-SR channel) to the terminal. This D-SR channel is a channel capable of transmitting 1-bit information at regular time intervals.

More specifically, in the LTE system, in order to use radio resources efficiently, the base station must know what data and how much to transmit to each user. In the case of downlink data, this downlink data is transferred from the access gateway to the base station. Therefore, the base station knows how much data should be transmitted to the downlink to each user. On the contrary, in the case of uplink data, the base station cannot know how much uplink radio resources each terminal needs unless the terminal directly informs the base station of information about data to be transmitted on the uplink. Therefore, in order for the base station to properly allocate the uplink radio resource to the terminal, each terminal should provide the base station with information necessary for the base station to schedule the radio resource.

To this end, the terminal informs the base station when there is data to be transmitted, and the base station transmits a radio resource allocation message to the terminal based on this information.

In the above process, that is, when the terminal informs the base station when there is data to be transmitted, the terminal informs the base station of the amount of data accumulated in its buffer. This is called Buffer Status Report (BSR).

However, the buffer status information is generated in the form of MAC Control Element and included in the MAC PDU and transmitted from the terminal to the base station. That is, uplink radio resources are required to transmit the buffer status report (BSR). This means that uplink radio resource allocation request information for transmitting buffer status information should be transmitted. When the buffer state information is generated, if there is an allocated uplink radio resource, the terminal immediately transmits the buffer state information by using the uplink radio resource. The process of transmitting the buffer state information to the base station by the terminal is called a buffer state information process (BSR procedure). The BSR process includes: 1) when there is no data in all buffers, new data arrives in a buffer, 2) data arrives in an empty buffer, and the priority of the logical channel associated with the buffer is If the priority is higher than the logical channel associated with the buffer that had the data, 3) the cell has changed, etc. When the uplink radio resource is allocated after the BSR process is triggered, all the data in the buffer can be transmitted through the radio resource, but if the radio resource is insufficient to include the BSR, the terminal triggers the trigger. Cancels an existing BSR procedure.

However, when the buffer state information is generated, if there is no allocated uplink radio resource, the terminal performs a resource allocation request (SR) process.

There are two types of SR processes, a method of using a Dedicated Scheduling Request (D-SR) channel configured in a PUCCH resource, and a method of using a RACH process. That is, when the SR process is triggered, the UE sends a radio resource allocation request using the D-SR channel if the D-SR channel is allocated. If the D-SR channel is not allocated, the UE starts the RACH process. In the case of using the D-SR channel, a resource request allocation signal is transmitted in an upward direction through the D-SR channel.

The SR process continues until the terminal is allocated UL-SCH resources.

In general, for a radio resource allocated through the persistent radio resource allocation method, the terminal may send any logical channel or any control information using the radio resource. Radio resources allocated through the persistent radio resource allocation method do not exist in every sub-frame. In general, since voice data is generated at an interval of 20 ms, the radio resource is also allocated at an interval of approximately 20 ms. When the call is established, the base station sets up various types of RBs with the terminal. That is, not only the RB used for transmission of voice service data, but also the RB for transmitting and receiving control signaling, as well as the RB for Internet browsing, can be set.

The characteristic of the service set in the RB and the like is that data for the service is irregularly generated. Since the data of the voice service is constantly generated at 20 ms intervals, the data generation time of the service and the timing of the radio resources allocated through the continuous radio resource allocation method can be adjusted to match. However, the data generation time in other RBs does not coincide with the timing of radio resources allocated through the sustained radio resource allocation scheme. In this case, therefore, buffer status information is generated, which triggers the SR process. However, the SR process takes a lot of time, and if radio resources are allocated through the continuous radio resource allocation method before radio resources are allocated through the SR process, waste of radio resources occurs.

Accordingly, the present invention is to transmit a radio resource allocation request more effectively in the process of data exchange between the base station and the terminal.

In order to solve the above problems of the present invention, a method for transmitting a radio allocation resource request to the network in a wireless communication system, comprising: determining whether at least one scheduling information (triggering) is triggered; Checking whether there are periodically configured resources when it is determined that the at least one scheduling information is triggered; And if the periodically configured resources do not exist, performing a scheduling request (SR) process.

Preferably, the at least one scheduling information is characterized in that the buffer status report (BSR).

Preferably, the periodically configured resources are characterized in that the PR (Persistent Resources).

Preferably, the scheduling request process is performed by one of an uplink control channel transmission or a random access channel (RACH) process.

Preferably, if the uplink control channel is configured to transmit the scheduling request, the scheduling request is transmitted on the uplink control channel. If the uplink control channel is not configured to transmit the scheduling request, the RACH ( Random Access Channel) process is started.

Preferably, the uplink control channel is a physical uplink control channel (PUCCH).

In addition, to solve the above problems of the present invention, a method for transmitting a radio allocation resource request to the network in a wireless communication system, comprising: determining whether at least one scheduling information (triggering) is triggered; Checking whether there are allocated resources within a specific time period when it is determined that the at least one scheduling information is triggered; And if the allocated resources do not exist within the specific time period, performing a scheduling request (SR) process.

Preferably, the at least one scheduling information is characterized in that the buffer status report (BSR).

Preferably, the allocated resources are characterized in that the resources are configured periodically.

Preferably, the scheduling request process is performed by one of an uplink control channel transmission or a random access channel (RACH) process.

Preferably, if the uplink control channel is configured to transmit the scheduling request, the scheduling request is transmitted on the uplink control channel. If the uplink control channel is not configured to transmit the scheduling request, the RACH ( Random Access Channel) process is started.

Preferably, the uplink control channel is a physical uplink control channel (PUCCH).

Preferably, the specific time period is characterized by being configured by a Radio Resource Control (RRC) layer.

Preferably, the specific time interval is set according to a round trip time of data transmission.

The present invention proposes a method for preventing the start of a scheduling request (SR) or a buffer status report (BSR) when a terminal has already allocated radio resources from a base station, and the base station allocates and wastes radio resources more than necessary. It has the effect of preventing.

The present invention is applied to 3GPP communication technology, in particular UMTS (Universal Mobile Telecommunications System) system, communication device and communication method. However, the present invention is not limited thereto and may be applied to all wired and wireless communication to which the technical spirit of the present invention can be applied.

A basic concept of the present invention is a method for transmitting a radio allocation resource request to a network in a wireless communication system, comprising: determining whether at least one scheduling information is triggered; Checking whether there are periodically configured resources when it is determined that the at least one scheduling information is triggered; If there are no resources configured periodically, a method for transmitting a radio allocation resource request to a network in a wireless communication system comprising the step of performing a scheduling request (SR) process and the method We propose a wireless mobile communication terminal that can be performed.

A method of transmitting a radio allocation resource request to a network in a wireless communication system, the method comprising: determining whether at least one scheduling information is triggered; Checking whether there are allocated resources within a specific time period when it is determined that the at least one scheduling information is triggered; And if the allocated resources do not exist within the specific time period, performing a scheduling request (SR) process. We propose a wireless mobile communication terminal.

Hereinafter, the configuration and operation of the embodiments according to the present invention will be described with reference to the accompanying drawings.

As described above, the present invention can effectively use the radio resources by preventing unnecessary buffer status information reporting or scheduling request (SR) process in the terminal receiving the radio resources through the continuous radio resource allocation method. I would like to present a method.

To this end, the present invention proposes that the terminal does not automatically or arbitrarily start a scheduling request (SR) process even when a BSR (Buffer Status Report) is triggered when the radio resource allocated through the persistent radio resource allocation method is set. In this case, the triggered BSR may be canceled, the next time the uplink radio resource is allocated through the PDCCH (Physical Downlink Control Channel) may be transmitted through the radio resource, the allocation through the continuous radio resource allocation scheme The first uplink radio resource may be transmitted through the next uplink radio resource, or the next uplink radio resource allocated through the sustained radio resource allocation method and the uplink radio resource through the PDCCH may be selected to transmit the BSR in time. It may be.

In addition, the present invention proposes that the UE does not trigger the BSR process when the radio resource allocated through the persistent radio resource allocation method is set. That is, in general, when the BSR process is triggered, the scheduling request (SR) process is also triggered. Thus, not triggering the above-described BSR process may be implemented as the BSR process is triggered but the SR process is not triggered.

In other words, when data arrives on a logical channel, the terminal first checks whether there is an uplink radio resource allocated through the persistent radio resource allocation method, and if the radio resource does not exist, the condition of the BSR trigger only occurs. You can check if it is satisfied and, if so, trigger the BSR. In addition, if there is no radio resource allocated in the upward direction and the BSR process is triggered, the terminal checks whether there is an uplink radio resource allocated through the persistent radio resource allocation method, and only if there is no radio resource. You can start the SR process. Here, if the persistent radio resource allocation method is used, even if data arrives in the empty buffer, the BSR is not triggered. Or, even if the BSR is triggered, the SR process is not triggered.

In addition, when the continuous radio resource allocation method is used, the base station additionally informs the terminal of the BSR related logical channel list. In this case, when data arrives in an empty buffer of the terminal, the terminal checks whether the data is included in the BSR related logical channel list, and if not, triggers the BSR and, if necessary, starts the SR process. have. Or, if the persistent radio resource allocation method is used, the base station additionally informs the terminal of the BSR-related logical channel list. In this case, when data arrives in an empty buffer of the terminal, the terminal checks whether the data is included in the BSR related logical channel list, and if so, triggers the BSR and, if necessary, starts the SR process. have.

In addition, when the continuous radio resource allocation method is used, the base station additionally informs the terminal of the BSR related logical channel list. In this case, when data arrives in an empty buffer of the terminal, the terminal may check whether the data is included in the BSR-related logical channel list, and if not, may not trigger the BSR. Or, if the persistent radio resource allocation method is used, the base station additionally informs the terminal of the BSR-related logical channel list. In this case, when data arrives in an empty buffer of the terminal, the terminal may check whether the data is included in the BSR-related logical channel list, and if so, may not trigger the BSR.

In the above process, if data arrives in the empty buffer, the terminal may perform the operations when the logical channel corresponding to the data has a higher priority than other logical channels having data in the buffer. In addition, when the continuous radio resource allocation method is used, the base station additionally informs the terminal of the BSR related logical channel list. In this case, when data arrives in an empty buffer of the terminal, the terminal checks whether the data has a higher priority than logical channels included in the BSR related logical channel list, and if the priority is high, trigger the BSR. It may be.

In the above processes, when the BSR is triggered, the scheduling request (SR) may be additionally triggered if there is no allocated radio resource. Alternatively, when the persistent radio resource allocation method is used, the terminal may trigger the BSR when the amount of data stored in the buffer of a certain logical channel is greater than a predetermined level. Or, if the amount of data stored in the buffer of a logical channel is larger than the amount of data that can be transmitted through the radio resources allocated through the persistent radio resource allocation scheme, the terminal may trigger the BSR.

As another method of the present invention, an operation method in consideration of a timer or time can be considered. That is, when the BSR is triggered at a certain time point, and when the persistent radio resource allocation method is set, the time difference between the time point of the triggered BSR and the next time point of the allocated radio resource is determined through the persistent radio resource allocation method, and the time If the difference is less than a certain range, the SR process is not started. If the time difference is more than a certain range, the SR process is started. In addition, when data arrives in an empty buffer at a certain point in time, and when a persistent radio resource allocation method is set, the point of time when the data arrives and the next time point of a radio resource allocated through the persistent radio resource allocation method If the time difference is calculated and the time difference is less than a certain range, the BSR is not triggered. If the time difference is more than the predetermined range, the BSR process is triggered.

6 is an exemplary diagram illustrating a method of operating a buffer status report (BSR) using pre-allocated radio resources according to the present invention.

In FIG. 6, the BSR may be interpreted in the same manner as the scheduling request SR. As shown in FIG. 6, it is assumed that a predetermined time period is arbitrarily called a B section at a time point of a radio resource allocated by the continuous radio resource allocation method, and the other time interval is called an A section. Here, if the data arrives in the section A, the SR or BSR process begins as described above with the proposals of the present invention. If the data arrives in the section B, the SR or BSR as the proposals of the present invention described above. The process does not begin.

In the present invention, only the case where the radio resource is allocated by the continuous radio resource allocation method is described. However, the present invention can also be used or applied in the general dynamic radio resource allocation method. For example, in a real dynamic radio resource allocation method, there is a time difference between a time point at which a radio resource allocation message is transmitted through a PDCCH and a time point at which a radio resource indicated by the radio resource allocation message is actually used by the terminal. Therefore, when data arrives during the time interval, it is wasteful to perform SR or BSR. Therefore, when a radio resource for initial transmission is allocated by the dynamic radio resource allocation method, the present invention does not trigger the BSR or SR until the terminal can actually use the radio resource, or ignore the BSR or SR. Suggest. In addition, the present invention relates to a newly allocated UL-SCH when data newly arrives in a buffer of a specific logical channel, especially when the priority of the logical channel is higher than that of any other logical channel that previously had data. If all new data arriving at the logical channel can be transmitted through a radio resource, it is proposed not to cancel or start the BSR procedure.

Hereinafter, a terminal according to the present invention will be described.

The terminal according to the present invention includes all types of terminals that can use a service that can exchange data with each other over the air. That is, the terminal according to the present invention is a mobile communication terminal capable of using a wireless communication service (for example, user equipment (UE), mobile phone, cellular phone, DMB phone, DVB-H phone, PDA phone, and PTT phone, etc.) It is a comprehensive meaning including laptops, laptops, laptops, digital TVs, GPS navigation, handheld game consoles, MP3s, and other consumer electronics.

The terminal according to the present invention may include a basic hardware configuration (transmitter / receiver, processor or controller, storage, etc.) required to perform functions and operations for efficient system information reception illustrated in the present invention.

The method according to the invention described thus far can be implemented in software, hardware, or a combination thereof. For example, the method according to the present invention may be stored in a storage medium (eg, internal memory of a mobile terminal or base station, flash memory, hard disk, etc.), and may be stored in a processor (eg, mobile terminal or base station). Code or instructions within a software program that can be executed by an internal microprocessor.

In the above, the present invention has been described with reference to the embodiments shown in the drawings, which are merely exemplary and will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. . Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a network structure of an E-UMTS, which is a mobile communication system to which the present invention and the present invention are applied.

2 is a control plane structure of a radio interface protocol between a UE and a UTRAN (UMTS Terrestrial Radio Access Network) based on the 3GPP radio access network standard.

3 is a user plane structure of a radio interface protocol between a UE and a UTRAN (UMTS Terrestrial Radio Access Network) based on the 3GPP radio access network standard.

4 is an exemplary diagram illustrating a contention based random access procedure.

5 is an exemplary diagram illustrating a radio resource allocation according to the prior art.

6 is an exemplary diagram illustrating a method of operating a buffer status report (BSR) using pre-allocated radio resources according to the present invention.

Claims (14)

A method of transmitting a radio allocation resource request to a network in a wireless communication system, Determining whether at least one scheduling information has been triggered; Checking whether there are periodically configured resources when it is determined that the at least one scheduling information is triggered; And And if the periodically configured resources do not exist, performing a scheduling request (SR) process. 2. The method of claim 1, wherein the at least one scheduling information is a Buffer Status Report (BSR). 2. The method of claim 1, wherein the periodically configured resources are Persistent Resources (PRs). 2. The method of claim 1, wherein the scheduling request process is performed by one of an uplink control channel transmission or a random access channel (RACH) procedure. 5. The method of claim 4, wherein if the uplink control channel is configured to send the scheduling request, the scheduling request is sent on an uplink control channel, and if the uplink control channel is not configured to send the scheduling request, A method of transmitting a radio allocation resource request to a network in a wireless communication system, characterized in that the RACH (Random Access Channel) process is started. The method of claim 5, wherein the uplink control channel is a PUCCH (Physical Uplink Control Channel). A method of transmitting a radio allocation resource request to a network in a wireless communication system, Determining whether at least one scheduling information has been triggered; Checking whether there are allocated resources within a specific time period when it is determined that the at least one scheduling information is triggered; And And if the allocated resources do not exist within the specific time period, performing a scheduling request (SR) process. 8. The method of claim 7, wherein the at least one scheduling information is a Buffer Status Report (BSR). 8. The method of claim 7, wherein the allocated resources are periodically configured resources. 8. The method of claim 7, wherein the scheduling request process is performed by one of an uplink control channel transmission or a random access channel (RACH) process. 11. The method of claim 10, wherein if the uplink control channel is configured to send the scheduling request, the scheduling request is sent on an uplink control channel, and if the uplink control channel is not configured to send the scheduling request, A method of transmitting a radio allocation resource request to a network in a wireless communication system, characterized in that the RACH (Random Access Channel) process is started. 12. The method of claim 11, wherein the uplink control channel is a PUCCH (Physical Uplink Control Channel). 8. The method of claim 7, wherein the specific time period is configured by a Radio Resource Control (RRC) layer. 8. The method of claim 7, wherein the specific time interval is set according to a round trip time of data transmission.

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