KR20080073242A - Method and apparatus for transmitting and receiving variable sized packet in mobile telecommunication system - Google Patents

Abstract

A method for transceiving packets of variable size in a mobile communication system and a device thereof are provided to temporarily change semi-static TB(Transport Block) size in a network entity, if a packet which is not capable of being transmitted in semi-static TB size is generated in the mobile communication system using a semi-permanent transmission resource. A terminal receives TB size and a semi-permanent transmission resource(705). If transmission time for using the semi-permanent transmission resource is reached, the terminal updates the TB size into the most recently received TB size-related value(710,713). The terminal checks whether a VoIP(Voice over Internet Protocol) packet is receivable within an MAC(Medium Access Control) PDU(Protocol Data Unit) without being divided(715). If so, the terminal receives the VoIP packet in the MAC PDU of the TB size, and sends the MAC PDU(720,735).

Description

METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING VARIABLE SIZED PACKET IN MOBILE TELECOMMUNICATION SYSTEM}

The present invention relates to a mobile communication system. In particular, the present invention relates to a method and apparatus for transmitting and receiving a packet having a variable size in order to efficiently support a service using a persistent transmission resource.

UMTS (Universal Mobile Telecommunication Service) system is based on the European mobile system Global System for Mobile Communications (GSM) and General Packet Radio Services (GPRS), and Wideband Code Division Multiple Access: Third generation asynchronous mobile communication system using " CDMA. &Quot;

The 3rd Generation Partnership Project (3GPP), which is in charge of UMTS standardization, is discussing Long Term Evolution (LTE) as the next generation UMTS mobile communication system. LTE is a technology that implements high-speed packet-based communication of about 100 Mbps, aiming for commercialization in 2010. To this end, various schemes are discussed. For example, a scheme of reducing the number of nodes located on a communication path by simplifying a network structure, or approaching wireless protocols as close as possible to a wireless channel are under discussion.

In the next generation mobile communication system, the base station Node B supports base station scheduling for allocating transmission resources to the terminal based on radio resource demand and channel conditions of the user equipment (hereinafter referred to as UE). Base station scheduling is efficient for high-speed packet services, but not for services where small packets occur periodically, such as Voice over Internet Protocol (VoIP). Therefore, in a next generation mobile communication system such as LTE or 802.20, a predetermined transmission resource is pre-allocated at regular intervals for VoIP, and the size of a transport block (hereinafter referred to as TB), which is a packet of a MAC layer that stores VoIP packets, is fixed This eliminates the need for outband signaling for changing the size of TB during VoIP packet transmission.

1 is a flowchart illustrating an example of an operation of providing a VoIP service using a semi-persistent transmission resource and a semi-fixed TB size according to the related art.

Referring to FIG. 1, in step 115, a terminal 105 and a base station Node B 110, which is a network entity, undergo a VoIP call setup process, and the base station 110 transmits a semi-permanent transmission resource to be allocated to the terminal 105. resource and the semi-static TB size to be used by the terminal through a predetermined scheduling process, and then in step 120 notifies the terminal of the determined result (120). In step 125, the UE stores the VoIP packet in the TB configured according to the size of the semi-fixed TB and transmits it through the semi-persistent transmission resource.

The semi-persistent transmission resource and quasi-fixed TB size remain valid until replaced by another value by separate signaling. In other words, the terminal repeats step 125 for every VoIP packet until the base station issues a separate command.

The use of semi-permanent transmission resources and semi-fixed TB sizes pre-determined by the base station has the advantage that no separate control information needs to be transmitted. However, if a VoIP packet of a size not accommodated in a semi-fixed TB size TB is generated, There is also a problem in that subsequent VoIP packets are continuously divided and transmitted.

The VoIP packet has a variable size due to a header compression scheme such as Robust Header Compression (ROHC). ROHC compresses a 60-byte user datagram protocol (IP / UDP) / real-time protocol (RTP) header to about 3 bytes, and 3 bytes if an unexpected change occurs in the information in the IP / UDP / RTP header. Compress more than the size, for example 4 to 15 bytes. Since the size of the voice frame generated by the codec is constant at 32 bytes based on AMR (Adaptive Multi-Rate) 12.2 kbps, the size of the VoIP packet at the radio protocol level eventually has a size of about 35 to 47 bytes. If the base station sets the semi-fixed TB size to 35 bytes, the most frequently occurring VoIP packet size in step 120, VoIP packets larger than 35 bytes cannot be accommodated in one TB, so that some of the large VoIP packets are Is stored in the TB and the rest is stored in the next TB and transmitted.

2 illustrates a problem of the VoIP service according to the prior art.

Referring to FIG. 2, when the VoIP packets 205 and 215 having a size of 35 bytes are generated, the packets 205 and 215 are accommodated in the TB 210 and 220 of the semi-fixed TB size m. Is sent. However, when the VoIP packet 225 having a size of 36 bytes is generated, only 35 bytes which are a part of the VoIP packet 225 are transmitted to the TB 230 having a fixed TB size m, and 1, which is the remainder of the VoIP packet 225, is transmitted. The byte is then sent in TB 240. Then, the next TB 245 must also store the next VoIP packet 235, 250, so that only the first 34 bytes 235 of the next VoIP packet 235, 250 are transmitted through the TB 245, and the VoIP packet ( The remaining one byte 250 of 235 again persists in the transmission in the next TB 245.

This problem always occurs unless the quasi-fixed TB size is set to the maximum size of the VoIP packet. However, in order to cope with this problem, setting the semi-fixed TB size to the maximum size of the VoIP packet, for example 47 bytes, causes another problem of being inefficient because 12 bytes of space is wasted by padding in most TBs. do.

The present invention provides a method and apparatus for temporarily changing the semi-fixed TB size in a network entity when a packet that cannot be transmitted with a semi-fixed TB size occurs in a mobile communication system using semi-persistent transmission resources.

The present invention provides a method and apparatus for notifying a network entity that a packet that cannot be transmitted with a semi-fixed TB size has occurred in a mobile communication system using semi-persistent transmission resources.

According to a preferred embodiment of the present invention, in a method for transmitting packets of variable size in a mobile communication system,

If a packet to be transmitted cannot be received without being divided into TBs having a transport block (TB) size signaled from a base station, size information indicating a required TB size calculated in consideration of the size of the next packet has the TB size. Storing the packet along with the divided part of the packet in a TB and transmitting the same to the base station;

Receiving a new TB size determined according to the size information from the base station;

And transmitting at least one subsequent packet to the base station according to the new TB size.

In a preferred embodiment of the present invention, a terminal apparatus for transmitting packets of variable size in a mobile communication system,

If a packet to be transmitted cannot be received without being divided into TBs having a TB size of a transport signal signaled from a base station, the TB having the TB size includes size information indicating a required TB size calculated in consideration of the size of the next packet. A control unit accommodating the divided part of the packet at

And transmitting and receiving one of the TBs to the base station, and receiving and providing a new TB size determined according to the size information from the base station to the controller.

According to a preferred embodiment of the present invention, in a method for receiving packets of variable size in a mobile communication system,

Signaling a transport block (TB) size to a terminal;

When the TB having the TB size is received from the terminal, determining whether the TB includes size information indicating a required TB size of the terminal;

If the size information is included, extracting a divided part of the packet from the TB, and transmitting a new TB size determined according to the size information to the terminal;

Receiving at least one subsequent packet from the terminal according to the new TB size.

In a preferred embodiment of the present invention, a base station apparatus for receiving packets of variable size in a mobile communication system,

A transceiver for receiving a TB having a transport block (TB) size signaled to the terminal from the terminal;

If the TB includes the size information indicating the required TB size of the terminal, and extracts a part of the packet from the TB and transmits a new TB size determined according to the size information to the terminal through the transceiver, and the new And a control unit controlling the transceiver to receive at least one subsequent packet from the terminal according to a TB size.

According to a preferred embodiment of the present invention, in a method for transmitting packets of variable size in a mobile communication system,

If a packet to be transmitted cannot be received without being divided into TBs having a transport block (TB) size signaled from a base station, size information indicating a required TB size calculated in consideration of the size of the next packet has the TB size. Storing the packet along with the divided part of the packet in a TB and transmitting the same to the base station;

Transmitting at least one subsequent packet to the base station according to the requested TB size during at least one predetermined transmission time point after the TB including the size information is successfully transmitted to the base station. It is done.

In a preferred embodiment of the present invention, a terminal apparatus for transmitting packets of variable size in a mobile communication system,

If a packet to be transmitted cannot be received without being divided into TBs having a TB size of a transport signal signaled from a base station, the TB having the TB size includes size information indicating a required TB size calculated in consideration of the size of the next packet. A control unit accommodating the divided part of the packet at

Transmitting one of the TBs to the base station, and including a subsequent packet according to the requested TB size for at least one predetermined transmission time point after the TB including the size information is successfully transmitted to the base station. And a transmitter for transmitting a TB to the base station.

According to a preferred embodiment of the present invention, in a method for receiving packets of variable size in a mobile communication system,

Signaling a transport block (TB) size to a terminal;

When the TB having the TB size is received from the terminal, determining whether the TB includes size information indicating a required TB size of the terminal;

If the size information is included, extracting a part of the packet from the TB, and notifying the terminal of the successful reception of the TB including the size information;

Receiving at least one subsequent packet from the terminal according to the requested TB size.

In a preferred embodiment of the present invention, a base station apparatus for receiving packets of variable size in a mobile communication system,

A receiver for receiving a TB having a transport block (TB) size signaled to the terminal from the terminal;

If the TB includes size information indicating the requested TB size of the terminal, the terminal notifies that the terminal has successfully received the TB including the size information after extracting the divided part of the packet from the TB; And a control unit controlling the receiving unit to receive at least one subsequent packet from the terminal according to a TB size.

According to a preferred embodiment of the present invention, in a method for transmitting packets of variable size in a mobile communication system,

If a packet to be transmitted cannot be stored without being divided into TBs having a TB size of a transport signal (TB) signaled to the terminal, the TB having the TB size is size information indicating a next TB size calculated in consideration of the next packet size. Storing the packet together with the divided portion of the packet and transmitting the received packet to the terminal;

And transmitting a subsequent packet to the terminal according to the next TB size during at least one predetermined transmission time point after the TB including the size information is successfully transmitted to the terminal.

In a preferred embodiment of the present invention, a base station apparatus for transmitting packets of variable size in a mobile communication system,

If a packet to be transmitted cannot be received without being divided into TBs having a TB size of a transport signal signaled to the UE, the TB having the TB size is size information indicating the next TB size calculated in consideration of the size of the next packet. A control unit accommodating the divided part of the packet at

Transmitting one of the TBs to the terminal and including a subsequent packet according to the next TB size during at least one predetermined transmission time point after the TB including the size information is successfully transmitted to the terminal. It characterized in that it comprises a transceiver for transmitting a TB to the terminal.

According to a preferred embodiment of the present invention, in a method for receiving packets of variable size in a mobile communication system,

Receiving a TB having a transport block (TB) size signaled by the base station from the base station, determining whether the TB includes size information indicating a next TB size of the base station;

If the size information is included, extracting a part of the packet from the TB and notifying the base station that the TB including the size information has been successfully received;

And receiving at least one subsequent packet from the base station according to the next TB size.

In a preferred embodiment of the present invention, a terminal apparatus for receiving packets of variable size in a mobile communication system,

A receiving unit for receiving a TB having a transport block (TB) size signaled by the base station from the base station;

If the TB includes size information indicating the next TB size of the base station, the base station extracts a portion of the packet from the TB and notifies the base station that the TB including the size information has been successfully received. And a control unit controlling the receiving unit to receive at least one subsequent packet from the base station according to the TB size.

According to a preferred embodiment of the present invention, in a method for transmitting packets of variable size in a mobile communication system,

Determining whether a packet generated in a service logical channel is divided and transmitted;

If a packet generated in the logical channel is divided and transmitted, a buffer status report message including at least a buffer status of the logical channel is configured to request an additional transmission resource for the remaining divided packets of the logical channel to the base station. It characterized in that it comprises a process of transmitting.

In a preferred embodiment of the present invention, a terminal apparatus for transmitting packets of variable size in a mobile communication system,

If a packet generated in the service logical channel is divided and transmitted, the control unit constituting a buffer status report message including at least the buffer status of the logical channel to request additional transmission resources for the remaining divided packets of the logical channel Wow,

And a transmitter for transmitting the buffer status report message to a base station.

When the effect obtained by the typical thing of the invention disclosed in this invention is demonstrated briefly, it is as follows.

The present invention minimizes waste of transmission resources in providing VoIP service by appropriately adjusting the TB size which is fixed in a semi-fixed manner in a service using semi-permanent transmission resources.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the preferred embodiment of the present invention. In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the present invention may unnecessarily obscure the subject matter of the present invention. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

An important aspect of the present invention is to notify a scheduler of a base station, which is a network entity, when a packet is generated that is not received in a predetermined size of a transport block (TB) in a mobile communication system to provide a service using a semi-persistent transmission resource. It is. Then, the base station temporarily increases the TB size at the request of the terminal. As an example, in a situation in which a transmission block for VoIP service is semi-permanently allocated and a size of a transport block (TB) for accommodating VoIP packets is determined, when the size of a newly generated VoIP packet exceeds the TB size, the UE The base station is notified of the occurrence of the VoIP packet and requested to temporarily increase the TB size.

In the following description, the LTE system based on the UMTS system will be used. However, the processing of the control message, which is a basic object of the present invention, is applicable to other mobile communication systems having a similar technical background and channel form with a slight modification without departing from the scope of the present invention. In the judgment of those skilled in the art will be possible.

First, the relationship between TB and VoIP packets will be described briefly.

In LTE, protocol layers called Radio Link Control (RLC) and Medium Access Control (MAC) exist, and the RLC layer is responsible for framing packets generated in a higher layer to an appropriate size, that is, splitting or concatenating higher layer packets. A packet transmitted from the RLC layer to the MAC layer is called an RLC Protocol Data Unit (PDU). The MAC layer inserts RLC PDUs delivered from an RLC layer through multiplexing into MAC PDUs, and then transmits the MAC PDUs to a counterpart entity through a physical layer. RLC PDUs and MAC PDUs are headers of a corresponding protocol attached to each higher layer PDU.

3 shows the relationship between the VoIP packet and the TB applied to the present invention.

Referring to FIG. 3, the RLC PDU attaches RLC-specific header information (hereinafter referred to as RLC header) 310 to an upper layer packet input to the RLC layer, for example, a VoIP packet 305, such as a serial number. The TB or MAC PDU 320 attaches MAC-specific header information (hereinafter referred to as MAC header) 315 to the RLC PDU.

When only one VoIP packet is stored in TB and transmitted, the size of VoIP packet and TB have the following relationship.

TB Size = (MAC Header Size) + (RLC Header Size) + (VoIP Packet Size)

At the start of the VoIP service, the base station sets the TB size according to the size of the VoIP packet that is expected to occur frequently. The TB size is a sum of the size of the VoIP packet expected to occur frequently and the size of the MAC header and the size of the RLC header, and has a semi-static characteristic.

4 briefly illustrates the overall operation according to the preferred embodiment of the present invention. The size of the VoIP packet expected to occur frequently is n bytes, and the TB size set accordingly is called (n + h) bytes. H is the size of the MAC header and the RLC header.

Referring to FIG. 4, VoIP packets 405, 415, 435 having a size of n bytes and VoIP packets 425 having a size smaller than n bytes are TBs 410 of (n + h) bytes having a TB size. , 420, 430, and 440 are completely stored and transmitted at once. TB 430 containing VoIP packet 425 having a size smaller than n bytes is filled with padding bits.

When the VoIP packet 445 larger than n bytes is generated, the terminal decides to divide the VoIP packet 445 because it cannot be stored in the TB 450 of (n + h) bytes at once. At this time, in order to minimize the case where the VoIP packet 445 is split, the UE signals the required TB size 452 with the VoIP packet 445 for the next transmission to the base station. . That is, the base station informs the base station through the 'required TB size' 452 of the part of the VoIP packet 445 remaining untransmitted and the TB size capable of simultaneously transmitting the packet to be transmitted at the next transmission time. To adjust temporarily.

The terminal calculates the 'required TB size' using Equation 1 below.

TB size required = (the following VoIP packet size + h + s + k) byte.

In Equation 1, 'next VoIP packet size' refers to a size of a VoIP packet to be transmitted at a next transmission point, and a VoIP packet to be transmitted at a next transmission point at the time of signaling the required TB size. If present in this transmit buffer, the size of the buffered packet is used; otherwise, n is used, which is the size of a typical VoIP packet.

h is the size difference between the VoIP packets 405, 415, 425 or 435 and the TBs 410, 420, 430 or 440, and is the sum of the size of the MAC header 505 and the size of the RLC header 510. s is the size of the information field needed to signal the required TB size. The value of S is determined by the signaling scheme of the required TB size, and it is desirable to have the smallest possible size.

5 illustrates an example of a structure of a MAC PDU when a required TB size is stored in a MAC PDU according to a preferred embodiment of the present invention. As shown, the MAC PDU includes the MAC header 505, the RLC headers 510, 515 and the VoIP packet 520, and the required TB size is for example an RLC option header in the RLC headers 510, 515. May be defined. The required TB size 515 is then attached to the back of the general RLC header information 510.

After obtaining the requested TB size 452 as described above, the terminal inserts and transmits the size information indicating the requested TB size 452 into the TB 450 by a predetermined method. Therefore, the TB 450 stores only the (n-h) bytes of the previous part, not the whole VoIP packet 445, and the remaining (k + h) bytes are stored in the transmission buffer.

When the base station receives the size information, the base station resets the TB size for the next transmission time point in accordance with the requested TB size, and notifies the terminal if necessary, thereby notifying that the TB size has changed.

The terminal configures the TB 460 by storing all (k + h) bytes and the new VoIP packet 455 not previously transmitted according to the newly set TB size, and transmits the TB 460.

6 is a signaling flow illustrating the overall operation of a terminal and a base station according to the first embodiment of the present invention.

Referring to FIG. 6, when the terminal 605 and the base station 610 perform a call setup process for the VoIP service in step 615, the base station 610 transmits a semi-persistent transmission resource and a TB for the VoIP service to the terminal 605. Signal size.

When the VoIP packet is generated in the terminal 605, the terminal 605 stores the VoIP packet in a TB PMA MAC PDU and transmits the packet using the semi-persistent transmission resource in step 620. If the appropriate TB size is defined in step 615, frequently occurring VoIP packets are stored in the TB size MAC PDU without being split. The terminal repeats step 620 while generating VoIP packets of an acceptable size without being divided into TB PMA MAC PDUs. In step 625, if a VoIP packet that is not received without being divided into TB PMAs of TB size, that is, a larger VoIP packet than frequently generated VoIP packets is generated, the UE sends size information indicating a required TB size to the MAC PDU in step 630. The VoIP packet is stored in the remaining space excluding the size information of the MAC PDU, and the VoIP packet is received and transmitted. The required TB size is set to a size suitable for transmitting the remainder of the VoIP packet and the next VoIP packet at a time.

In step 635, the base station determines the size of the MAC PDU to be transmitted next by the terminal with reference to the requested TB size indicated by the size information included in the MAC PDU, and signals it to the terminal. At this time, if the required TB size, i.e., the size of the MAC PDU to be transmitted at the next transmission time is large enough to not be transmitted to the semi-persistent transmission resources, the base station temporarily transmits more transmission resources to the terminal at step 635. You can also assign.

In step 640, the UE configures the MAC PDU containing the remainder of the VoIP packet and the next VoIP packet by using the new TB size, and uses the pre-allocated or newly allocated transmission resource to select the MAC PDU. send. The new TB size is determined to be equal to the requested TB size transmitted by the terminal or in consideration of the required TB size.

In general, after a large VoIP packet is generated, VoIP packets of normal size are generated again, and more than necessary padding occurs when transmitting the VoIP packets of the normal size with the new TB size set in step 635. Therefore, after receiving the large VoIP packet, the base station switches to the original TB size. In this case, the base station re-signals the original TB size, or the new TB size is applied only to transmission of a predetermined number of n, for example, one MAC PDU, and then the base station and the terminal switch to the original TB size. You can agree in advance.

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

Referring to FIG. 7, in step 705, the UE signals a semi-persistent transmission resource and a TB size to be used for VoIP service on the reverse link from the base station. When the transmission time for using the semi-persistent transmission resources is reached in step 710, the terminal proceeds to step 713 to update the TB size to the most recently received TB size related value. If no new TB size has been received, the TB size received in step 705 is used as it is, and if a new TB size is received after step 705, the new TB size is used.

The terminal proceeds to step 715 and checks whether the VoIP packet to be transmitted can be stored without being partitioned in the MAC PDU having the (updated) TB size. When the overhead of H bytes is added to the VoIP packet to form the MAC PDU, if the TB size is larger than H bytes larger than the size of the VoIP packet, the VoIP packet may be stored in the MAC PDU without being divided, step 720. Proceed to On the other hand, if the TB size is not larger than H bytes larger than the size of the VoIP packet, the VoIP packet must be split, and therefore, the process proceeds to step 725.

In step 720, the UE stores the VoIP packet in the MAC PDU having the TB size, and proceeds to step 735 to transmit the MAC PDU, and then returns to step 710 to wait until the next transmission time using a semi-persistent transmission resource. do.

In step 725, the UE calculates the required TB size using Equation 1 described above, and proceeds to step 730 to store size information indicating the requested TB size in the TB PMA MAC PDU, After storing the first portion of the VoIP packet, the process proceeds to step 735 to transmit the MAC PDU, and returns to step 710 to wait until the next transmission time using a semi-persistent transmission resource. The remaining portion of the VoIP packet is transmitted along with the next VoIP packet in the next TB.

8 is a flowchart illustrating the operation of a base station according to the first embodiment of the present invention.

Referring to FIG. 8, in step 805, a base station signals a terminal to a semi-persistent transmission resource and a TB size to be used for VoIP service in a reverse link. If the MAC PDU is successfully received through the semi-persistent transmission resource in step 810, the process proceeds to step 815 and the base station checks whether the MAC PDU includes size information indicating a required TB size. If yes, go to step 1325; if not, go to step 820.

In step 820, the base station regards the size of the MAC PDU to be received next through the semi-persistent transmission resource as the original TB size set in step 805, and processes the MAC PDU to be received next. On the other hand, in step 825, the base station determines the new TB size for the next MAC PDU received by referring to the requested TB size, and notifies the terminal of the new TB size using an L1 / L2 control channel and the like. The new TB size is used to process the next incoming MAC PDU.

In the first embodiment of the present invention, the terminal signals the required TB size to the base station, and the base station transmits a new TB size corresponding to the requested TB size to the terminal. Typically, TB size is transmitted over a forward control channel called an L1 / L2 control channel, the capacity of which is limited. In addition, since the format of the L1 / L2 control channel is fixed, other information that is not necessary for signaling the TB size, for example, resource information or information related to a hybrid automatic retransmission request (HARQ) operation, is signaled together. In short, whenever a VoIP packet occurs that cannot be accommodated in TB size, signaling a new TB size with the L1 / L2 control channel is inefficient in many ways.

In the second embodiment of the present invention, if the MAC PDU containing the requested TB size is successfully transmitted, the UE regards the required TB size as the new TB size and configures and transmits the MAC PDU during the next N transmissions. When the transmission of the N MAC PDUs is completed, the original TB size is used. N is generally 1, but in some cases, a value greater than 1 may be used.

9 is a signaling flow illustrating the overall operation of a terminal and a base station according to the second embodiment of the present invention. Here, an example of the operation for the case where N = 1 will be described.

Referring to FIG. 9, when the terminal 905 and the base station 910 perform a call setup process for the VoIP service in step 915, the base station 910 transmits a semi-persistent transmission resource and a TB for the VoIP service to the terminal 905. Signal size.

When the VoIP packet is generated in the terminal 905, the terminal 905 stores the VoIP packet in a TB PMA MAC PDU and transmits the packet using the semi-persistent transmission resource in step 920. If the appropriate TB size is defined in step 915, frequently occurring VoIP packets are stored in the TB size MAC PDU without being split. The terminal repeats step 920 while generating VoIP packets of an acceptable size without being divided into TB PMA MAC PDUs.

In step 925, if a VoIP packet that is not stored without being divided, that is, larger than frequently generated VoIP packets is generated in the MAC PDU having a TB size, the UE 905 determines a required TB size in the MAC PDU in step 930. The size information indicated is stored, and a portion obtained by dividing the VoIP packet is stored in the remaining space excluding the size information of the MAC PDU. If the MAC PDU containing the size information is successfully transmitted to the base station 910, in step 935, the terminal 905 considers the required TB size to be a new TB size at the next N transmission time points, and the new TB size. MAC PDU is configured and transmitted using. If the required TB size is properly calculated, the MAC PDU contains both the remainder of the large VoIP packet segmentation and the next VoIP packet. In step 940, the UE 905 transmits the new TB size MAC PDU, and then configures and transmits the MAC PDU according to the original TB size. According to a predetermined value of N indicating the interval in which the required TB size is valid, the new TB size can be used in N transmissions.

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

Referring to FIG. 10, in step 1005, a UE receives a semi-persistent transmission resource and a TB size from a base station to use for a VoIP service on a reverse link. When the transmission time for using the semi-persistent transmission resources is reached in step 1010, the terminal proceeds to step 1015 to check whether the VoIP packet to be transmitted can be accommodated without being split into the MAC PDU having the TB size. When the overhead of H bytes is added to the VoIP packet to form the MAC PDU, if the TB size is larger than the size of the VoIP packet by more than H bytes, the VoIP packet may be stored in the MAC PDU without being divided, and thus, step 1020. Proceed to On the other hand, if the TB size is not larger than H bytes larger than the size of the VoIP packet, the VoIP packet must be split, and therefore, the process proceeds to step 1025.

In step 1020, the UE stores the VoIP packet in the MAC PDU having the TB size, proceeds to step 1023, transmits the MAC PDU, and then returns to step 1010 to wait until the next transmission time using a semi-persistent transmission resource. do. In step 1025, the UE calculates the required TB size using Equation 1 described above, proceeds to step 1030, and stores size information indicating the requested TB size in the TB PMA MAC PDU, and stores in the remaining space. After storing the first portion of the VoIP packet, the process proceeds to step 1035 and transmits the MAC PDU.

In step 1040, the UE determines whether the MAC PDU containing the size information has been successfully transmitted to the base station. The determination is made as an example by confirming whether an acknowledgment (ACK) for the MAC PDU has been received. If the MAC PDU containing the size information has been successfully transmitted to the base station, the terminal proceeds to step 1045, in configuring the MAC PDU to be transmitted at the next transmission time, configures the size of the MAC PDU according to the requested TB size, In step 1055, the MAC PDU is transmitted, and then the process returns to step 1010 to wait for the next VoIP packet to occur.

If the MAC PDU containing the size information has not been successfully transmitted, the terminal proceeds to step 1050 and, in configuring the MAC PDU to be transmitted at the next transmission time, configures the size of the MAC PDU according to the TB size. At this time, the MAC PDU is configured by storing only the next VoIP packet without including the rest of the large VoIP packet. This is because transmitting part of the large VoIP packet is meaningless since part of the large VoIP packet has already been lost.

For example, at a time of y msec, a z-byte VoIP packet is generated, the VoIP packet is divided into z1 bytes and z2 bytes, and then a MAC PDU containing a portion corresponding to z1 bytes and a required TB size is transmitted. Explain the example. If the transmission of the MAC PDU fails, the UE configures a MAC PDU to be transmitted at the next transmission time, and does not store the remaining portion of z2 bytes and stores the MAC PDU with only the next VoIP packet generated at [y + 20] msec. Configure and send.

The terminal proceeds to step 1055 to transmit the MAC PDU configured in step 1050 or step 1045, and returns to step 1010 to wait until the next VoIP packet occurs.

11 is a flowchart illustrating the operation of a base station according to the second embodiment of the present invention.

Referring to FIG. 11, in step 1105, a base station signals a terminal to a semi-persistent transmission resource and a TB size to be used for VoIP service in a reverse link. If the MAC PDU is successfully received through the semi-persistent transmission resource in step 1410, the process proceeds to step 1115 and the base station checks whether the MAC PDU includes size information indicating the required TB size. If yes, go to step 1125; if not, go to step 1120.

In step 1120, the base station regards the size of the MAC PDU to be received next through the semi-persistent transmission resource as the original TB size set in step 1105, and processes the next MAC PDU. On the contrary, in step 1125, the base station notifies the terminal that the MAC PDU has been successfully received, and then recognizes that the size of the N MAC PDUs has the requested TB size and processes the subsequent N MAC PDUs. MAC PDUs after the N MAC PDUs are processed using the original TB size.

In the second embodiment of the present invention, when transmitting a reverse VoIP packet, if a VoIP packet does not correspond to the TB size, the terminal signals the required TB size to the base station. However, the same problem exists in the transmission and reception of the forward VoIP packet, there is a need to solve it.

In the third embodiment of the present invention, when the base station piggybacks and transmits the next TB size to the MAC PDU, and the terminal receives the MAC PDU including the next TB size, the L1 / L2 control channel Even though the new TB size is not signaled, the MAC PDU to be transmitted at the next transmission time is configured using the next TB size piggybacked to the MAC PDU.

12 is a signaling flow illustrating the overall operation of a terminal and a base station according to the third embodiment of the present invention.

Referring to FIG. 12, when the terminal 1205 and the base station 1210 perform a call setup process for the VoIP service in step 1215, the base station 1210 transmits a semi-persistent transmission resource and a TB for the VoIP service to the terminal 1205. Signal size.

When the VoIP packet is generated in the base station 1210, in step 1220, the base station 1210 stores the VoIP packet in a TB PMA MAC PDU and transmits the packet using the semi-persistent transmission resource. Then, the terminal 1205 regards the MAC PDU received through the semi-persistent transmission resource as having a TB size and processes the MAC PDU. If the appropriate TB size is defined in step 1215, frequently occurring VoIP packets are stored in the TB size MAC PDU without being divided and transmitted. The terminal 1205 and the base station 1210 repeat the step 1220 while generating a VoIP packet of a size that is received without being divided into TB PMA MAC PDUs.

In step 1225, if a VoIP packet that is not received without being partitioned, i.e., is larger than frequently occurring VoIP packets, is generated in the TB PMA MAC PDU, in step 1230, the base station 1210 assigns the next TB size to the MAC PDU. The size information indicated is stored, and a portion obtained by dividing the VoIP packet in the remaining space excluding the size information of the MAC PDU is stored and transmitted to the terminal 1205. The next TB size is calculated in the same manner as the required TB size mentioned above, for example according to Equation 1 mentioned above.

If the MAC PDU containing the size information is successfully transmitted to the UE 1205, the base station 1210 considers that the TB size is the next TB size at the next transmission time, and configures and transmits the MAC PDU at step 1235. . Similarly, if the next TB size is stored in the MAC PDU received from the base station 1210, the terminal 1205 assumes that the next received MAC PDU has the next TB size and processes it. In this case, the next TB size may be applied to the next N MAC PDUs. (Where N is a positive integer) and MAC PDUs received thereafter are assumed to have the original TB size and processed. If the next TB size is properly calculated, the MAC PDU transmitted in step 1235 contains both the remainder of the large VoIP packet and the next VoIP packet.

The base station transmits the MAC PDU of the next TB size, and configures and transmits the MAC PDU according to the original TB size in step 1240.

13 is a flowchart illustrating an operation of a terminal according to the third embodiment of the present invention.

Referring to FIG. 13, in step 1305, a UE receives a semi-persistent transmission resource and a TB size from a base station to use for a VoIP service on a forward link. If the MAC PDU is successfully received through the semi-persistent transmission resource in step 1310, the UE proceeds to step 1315 and the UE checks whether the MAC PDU includes size information indicating a next TB size. If yes, go to step 1325; if not, go to step 1320.

In step 1320, the UE regards the size of the MAC PDU to be received next through the semi-persistent transmission resource as the TB size set in step 1305, and processes the next received MAC PDU. On the other hand, in step 1325, the UE regards the size of the next MAC PDU to be received as the next TB size through the semi-persistent transmission resource, and processes the next received MAC PDU.

14 is a flowchart illustrating the operation of a base station according to the third embodiment of the present invention.

Referring to FIG. 14, in step 1405, a base station signals a terminal to a semi-persistent transmission resource and a TB size to be used for VoIP service in a forward link. When the transmission time for using the semi-persistent transmission resource is reached in step 1410, the base station proceeds to step 1415 to check whether the VoIP packet to be transmitted can be accommodated without being split into the MAC PDU having the TB size. When the VoIP packet is added to the VoIP packet and becomes an MAC PDU, if the VoIP packet is larger than the TB size by H bytes, the VoIP packet may be stored in the MAC PDU without being divided. do. On the other hand, if the TB size is not larger than H bytes larger than the size of the VoIP packet, the VoIP packet must be split, and therefore, the process proceeds to step 1425.

In step 1420, the base station stores the VoIP packet in the TB PMA MAC PDU, and proceeds to step 1423 after transmitting the MAC PDU, and returns to step 1410 to wait until the next transmission time. In step 1425, the base station calculates the next TB size by using Equation 1 described above. In step 1430, the base station stores size information indicating the next TB size in the TB PMA MAC PDU, After storing the first portion of the VoIP packet, the process proceeds to step 1435 and transmits the MAC PDU.

In step 1440, the base station determines whether the MAC PDU containing the size information has been successfully transmitted to the terminal. The determination is made, for example, by checking whether an ACK for the MAC PDU has been received. If the MAC PDU containing the size information has been successfully transmitted to the UE, the base station proceeds to step 1445 to configure the size of the MAC PDU according to the next TB size in configuring the MAC PDU to be transmitted at the next transmission time point. In step 1455, the MAC PDU is transmitted, and then the procedure returns to step 1410 to wait until the next transmission time.

If the MAC PDU containing the size information has not been successfully transmitted, the base station proceeds to step 1450 and, when configuring the MAC PDU to be transmitted at the next transmission time, configures the size of the MAC PDU according to the original TB size. At this time, the MAC PDU is configured by storing only the next VoIP packet without including the rest of the large VoIP packet. This is because transmitting part of the large VoIP packet is meaningless since part of the large VoIP packet has already been lost.

The base station proceeds to step 1455 to transmit the MAC PDU configured in step 1450 or 1445, and returns to step 1410 to wait until the next transmission time.

In the fourth embodiment of the present invention, if a VoIP packet having a size larger than a preset size is generated and there is a high likelihood that the VoIP packets are continuously divided and transmitted, the UE may temporarily transmit a new transmission resource by sending a buffer status report message to the base station. Ask to be allocated.

The buffer status report message is a type of control message transmitted by the terminal to the base station and stores buffer status information such as the amount and priority of data stored in the terminal. The buffer status report message typically contains the buffer status of all logical channels that have data to send. One logical channel is created per service. It consists of devices that store, frame, and perform Automatic Retransmission reQuest (ARQ) operations.

There are various conditions for generating the buffer status report message. For example, the buffer status report message may be defined to be generated periodically or when a new high priority data is generated.

In the fourth embodiment of the present invention, the following [Condition 1] is added to existing generation conditions.

[Buffer status report occurrence condition 1]

Packets originating from a specific logical channel are fragmented and sent. In other words, the upper layer packet is split so that some are transmitted and some remain in the logical channel buffer.

As described above, once the VoIP packet is divided and transmitted, a problem may occur in that packets subsequently generated are continuously transmitted. Therefore, additional transmission resources should be temporarily allocated to solve the problem. In order to request the additional transmission resource from the base station, when the [Condition 1] is satisfied, that is, a packet generated in a specific logical channel connected with the VoIP service is divided and transmitted, the terminal constructs a buffer status report message and transmits the buffer status report message to the base station. Generally, the buffer status report message includes the buffer status of all logical channels in which data is stored, but the buffer status report message generated by the [condition 1] includes only the buffer status of the specific logical channel, or Only the buffer state of logical channels having a higher priority than the specific logical channel, including the specific logical channel, is included.

15 is a flowchart illustrating an operation of a terminal according to a fourth embodiment of the present invention.

Referring to FIG. 15, in step 1505, the UE recognizes a logical channel to which [buffer status report generation condition 1] is applied. The UE monitors the buffer state of the logical channel in step 1510. In step 1515, if the packet stored in the buffer of the logical channel is divided and transmitted, that is, if the packet stored in the buffer of the logical channel is not transmitted at one time and part of the packet remains in the buffer, the terminal proceeds to step 1520. Go ahead and generate a buffer status report message. Herein, the packet stored in the buffer of the logical channel is an RLC SDU as an example.

In this case, it may be determined whether to generate a buffer status report message by additionally considering the size of the remaining portion which is not divided and transmitted. For example, if the size of the remaining portion is greater than or equal to a predetermined reference value, a buffer status report message is generated.

In step 1520, the UE configures a buffer status report message, and stores only the buffer status of the logical channel in the buffer status report message, or a buffer channel of the logical channel and a logical channel having a higher priority than the logical channel. ) Buffer status. For example, the buffer state may include information indicating the amount of data stored in each buffer, or information indicating the amount of data stored in each buffer and information indicating the size of a portion remaining undivided and transmitted. it means. After generating and transmitting a buffer status report message, unless the service of the logical channel is terminated, the terminal returns to step 1510 to continue monitoring the buffer status of the logical channel.

Hereinafter, a block diagram of a terminal and a base station applicable to embodiments of the present invention will be described.

16 is a block diagram illustrating a terminal device according to an exemplary embodiment of the present invention. As illustrated, the terminal apparatus includes a multiplexing and demultiplexing apparatus 1605, a HARQ processor 1615, a transceiver 1630, a controller 1625, and a control channel processor 1620.

Referring to FIG. 15, the transmitter / receiver 1630 of the terminal receives data from a wireless channel or transmits data to the wireless channel under the control of the controller 1625. In more detail, in transmitting data through a wireless channel, a TB configured using a TB size designated by the controller 1625 is transmitted using a transmission resource designated by the controller 1625. In receiving data from a wireless channel, a TB is received using a TB size designated by the controller 1625 through a transmission resource designated by the controller 1625.

The controller 1625 determines a transmission resource and a TB size to be used for reverse transmission according to the signaling from the base station through the control channel processor 1620, and controls the transmission operation of the transceiver 1630 accordingly. For a service to which a semi-persistent transmission resource is allocated, the transceiver 1630 is controlled to transmit a TB using the semi-persistent transmission resource and the TB size at a predetermined time point. The controller 1625 compares the size of a packet stored in a transmission buffer (not shown) in the multiplexer / demultiplexer 1605 with the TB size to determine whether to divide the packet, and when the packet is divided. Next, the required TB size is calculated and size information indicating the required TB size is transmitted to the multiplexer 1605. The multiplexer / demultiplexer 1605 configures the TB in which the requested TB size is stored and transmits the TB to the HARQ processor 1615.

The controller 1625 also determines a transmission resource and a TB size to be used for forward reception according to the signaling from the base station, and controls the reception operation of the transceiver 1630 accordingly. For a service to which a semi-persistent transmission resource is allocated, the transceiver 1630 is controlled to receive a TB using the semi-persistent transmission resource and the designated TB size at a predetermined time point. If the TB received by the transceiver 1630 contains size information indicating the next TB size, the transceiver 1625 applies the next TB size to the TB received at the next reception time using the semi-persistent transmission resource. Control 1630.

The controller 1625 also monitors whether a packet is divided and transmitted in the logical channel to which [buffer status report generation condition 1] is applied, and when a divided and transmitted packet occurs, a predetermined buffer status report message is configured to be multiplexed and demultiplexed. To the device.

The multiplexing / demultiplexing unit 1605 multiplexes the packets generated in the upper layer into one TB and delivers them to the HARQ processor 1615 or demultiplexes the TBs transmitted by the HARQ processor 1615 to the appropriate upper layer. do. The HARQ processor 1615 is responsible for transmitting a TB from the multiplexer / demultiplexer 1605 through an HARQ operation or receiving a TB from a transceiver 1630 through an HARQ operation.

17 is a block diagram showing a base station apparatus according to a preferred embodiment of the present invention. As illustrated, the base station apparatus includes a multiplexer / demultiplexer 1705, an HARQ processor 1715, a transceiver 1730, a controller 1725, and a control channel processor 1720.

Referring to FIG. 17, a transceiver 1730 of a base station receives data from a wireless channel or transmits data through a wireless channel under control of a controller 1725 including a scheduler. In more detail, the transceiver 1730 transmits a TB configured using the TB size specified by the controller 1725 by using a transmission resource designated by the controller 1725 in transmitting data through a wireless channel. do. In addition, when receiving and receiving data from the wireless channel, the transceiver 1730 receives the TB using the TB size designated by the controller 1725 through a transmission resource designated by the controller 1725.

In addition, the controller 1725 serves as a scheduler for allocating transmission resources to the terminal in consideration of the channel condition of each terminal and the amount of data to be transmitted. In allocating the semi-persistent transmission resources, the semi-persistent transmission resources and the TB size of the reverse direction and the forward direction are determined and notified to the terminal.

According to the first embodiment, if the size information indicating the requested TB size is stored in the MAC PDU received by the transceiver 1730, the control unit 1725 signals the new TB size to the terminal through the control channel processing unit 1720. Ring, and allocates separate transmission resources if necessary. According to the second embodiment, if the size information indicating the requested TB size is stored in the MAC PDU received by the transceiver 1730, the control unit 1725 uses the requested TB size in the reverse link to the transceiver 1730. Control to process N packets received through the semi-persistent transmission resources of. According to the third embodiment, if the size of the packet to be transmitted is not completely stored in the TB of the TB size, the control unit 1730 calculates the next TB size and transmits it to the multiplexing / demultiplexing unit 1705.

The multiplexer / demultiplexer 1705 stores size information indicating the next TB size in a MAC PDU and transmits the size information to the terminal. In addition, the multiplexing / demultiplexing unit 1705 multiplexes the packets generated in the upper layer into one TB and delivers them to the HARQ processor 1715 or demultiplexes the TBs transmitted by the HARQ processor 1715 to the appropriate upper layer. Do it. The HARQ processor 1715 is responsible for transmitting a TB from the multiplexer / demultiplexer 1705 through an HARQ operation or receiving a TB from a transceiver 1730 through an HARQ operation.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

1 is a flowchart illustrating an operation of providing a VoIP service using a semi-persistent transmission resource and a semi-fixed TB size according to the prior art.

2 is a diagram illustrating a problem of a VoIP service according to the prior art.

3 is a diagram illustrating a relationship between a VoIP packet and a TB.

4 is a simplified illustration of the overall operation of a preferred embodiment of the present invention.

5 is a diagram illustrating an example of a structure of a MAC PDU when accommodating a required TB size in a MAC PDU according to a preferred embodiment of the present invention.

6 is a flowchart for explaining the overall operation of the first embodiment of the present invention;

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

8 is a flowchart illustrating the operation of a base station according to the first embodiment of the present invention.

9 is a flowchart for explaining the overall operation of the second embodiment of the present invention;

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

11 is a flowchart illustrating the operation of a base station according to the second embodiment of the present invention.

12 is a flowchart for explaining the overall operation of the third embodiment of the present invention.

13 is a flowchart illustrating the operation of a terminal according to the third embodiment of the present invention.

14 is a flowchart illustrating the operation of a base station according to the third embodiment of the present invention.

15 is a flowchart illustrating an operation of a terminal according to a fourth embodiment of the present invention.

16 is a block diagram showing a terminal device according to a preferred embodiment of the present invention.

17 is a block diagram showing a base station apparatus according to a preferred embodiment of the present invention.

Claims (42)

In the method for transmitting packets of variable size in a mobile communication system, If a packet to be transmitted cannot be received without being divided into TBs having a transport block (TB) size signaled from a base station, size information indicating a required TB size calculated in consideration of the size of the next packet has the TB size. Storing the packet along with the divided part of the packet in a TB and transmitting the same to the base station; Receiving a new TB size determined according to the size information from the base station; Transmitting at least one subsequent packet to the base station according to the new TB size. The method of claim 1, wherein the required TB size, The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. The method of claim 2, wherein the size of the next packet is And the size of the buffered packet to be transmitted at the next transmission time or the predetermined expected packet size. A terminal apparatus for transmitting packets of variable size in a mobile communication system, If a packet to be transmitted cannot be received without being divided into TBs having a TB size of a transport signal signaled from a base station, the TB having the TB size includes size information indicating a required TB size calculated in consideration of the size of the next packet. A control unit accommodating the divided part of the packet at And transmitting and receiving the TB to the base station, and receiving and providing a new TB size determined according to the size information from the base station to the controller. The method of claim 4, wherein the required TB size, The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. The method of claim 5, wherein the size of the next packet, And a size of a buffered packet to be transmitted at a next transmission time or the predetermined packet size. In the method for receiving packets of variable size in a mobile communication system, Signaling a transport block (TB) size to a terminal; When the TB having the TB size is received from the terminal, determining whether the TB includes size information indicating a required TB size of the terminal; If the size information is included, extracting a divided part of the packet from the TB, and transmitting a new TB size determined according to the size information to the terminal; Receiving at least one subsequent packet from the terminal, including the remainder of the packet, according to the new TB size. 8. The method of claim 7, wherein the required TB size is: It is the sum of the size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, and the excess size is stored in the TB size. A possible difference between the expected packet size and the size of the packet. The method of claim 8, wherein the size of the next packet, And the size of the buffered packet to be transmitted at the next transmission time or the predetermined expected packet size. A base station apparatus for receiving packets of variable size in a mobile communication system, A transceiver for receiving a TB having a transport block (TB) size signaled to the terminal from the terminal; If the TB includes the size information indicating the required TB size of the terminal, and extracts a part of the packet from the TB and transmits a new TB size determined according to the size information to the terminal through the transceiver, and the new And a control unit for controlling the transceiver to receive at least one subsequent packet from the terminal, including a remainder of the packet, according to a TB size. The method of claim 10, wherein the required TB size, It is the sum of the size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, and the excess size is stored in the TB size. Base station apparatus, characterized in that the difference between the expected packet size and the size of the packet. The method of claim 11, wherein the size of the next packet, The base station apparatus, characterized in that the size of the buffered packet to be transmitted at the next transmission time or the predetermined packet size. In the method for transmitting packets of variable size in a mobile communication system, If a packet to be transmitted cannot be received without being divided into TBs having a transport block (TB) size signaled from a base station, size information indicating a required TB size calculated in consideration of the size of the next packet has the TB size. Storing the packet along with the divided part of the packet in a TB and transmitting the same to the base station; Transmitting at least one subsequent packet to the base station according to the requested TB size during at least one predetermined transmission time point after the TB including the size information is successfully transmitted to the base station. Transmission method. The method of claim 13, wherein the required TB size, The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. 15. The method of claim 14, wherein the size of the next packet is And the size of the buffered packet to be transmitted at the next transmission time or the predetermined expected packet size. A terminal apparatus for transmitting packets of variable size in a mobile communication system, If a packet to be transmitted cannot be accommodated without being divided into TBs having a TB size of a transport signal signaled from a base station, the TB having the TB size includes size information indicating a required TB size calculated in consideration of the size of the next packet. A control unit accommodating the divided part of the packet at Transmitting one of the TBs to the base station, and including a subsequent packet according to the requested TB size for at least one predetermined transmission time point after the TB including the size information is successfully transmitted to the base station. And a transmitter for transmitting a TB to the base station. The method of claim 16, wherein the required TB size, The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. The method of claim 17, wherein the size of the next packet, And a size of a buffered packet to be transmitted at a next transmission time or the predetermined packet size. In the method for receiving packets of variable size in a mobile communication system, Signaling a transport block (TB) size to a terminal; When the TB having the TB size is received from the terminal, determining whether the TB includes size information indicating a required TB size of the terminal; If the size information is included, extracting a part of the packet from the TB, and notifying the terminal of the successful reception of the TB including the size information; Receiving at least one subsequent packet from the terminal according to the requested TB size. The method of claim 19, wherein the required TB size, The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. The method of claim 20, wherein the size of the next packet is And the size of the buffered packet to be transmitted at the next transmission time or the predetermined expected packet size. A base station apparatus for receiving packets of variable size in a mobile communication system, A receiver for receiving a TB having a transport block (TB) size signaled to the terminal from the terminal; If the TB includes size information indicating the requested TB size of the terminal, the terminal notifies that the terminal has successfully received the TB including the size information after extracting the divided part of the packet from the TB; And a control unit controlling the receiving unit to receive at least one subsequent packet from the terminal according to a TB size. The method of claim 22, wherein the required TB size is: The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. The method of claim 23, wherein the size of the next packet, The base station apparatus, characterized in that the size of the buffered packet to be transmitted at the next transmission time or the predetermined packet size. In the method for transmitting packets of variable size in a mobile communication system, If a packet to be transmitted cannot be stored without being divided into TBs having a transport block (TB) size signaled to the terminal, size information indicating the next TB size is calculated in consideration of the size of the next packet and has the TB size. Storing the packet along with the divided part of the packet in a TB and transmitting the received packet to the terminal; Transmitting at least one subsequent packet to the terminal according to the next TB size during at least one transmission time point predetermined after the TB including the size information is successfully transmitted to the terminal. Transmission method. The method of claim 25, wherein the next TB size, The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. The method of claim 26, wherein the size of the next packet, And the size of the buffered packet to be transmitted at the next transmission time or the predetermined expected packet size. A base station apparatus for transmitting packets of variable size in a mobile communication system, If a packet to be transmitted cannot be received without being divided into TBs having a TB size of a transport signal signaled to the UE, the TB having the TB size is size information indicating the next TB size calculated in consideration of the size of the next packet. A control unit accommodating the divided part of the packet at Transmitting at least one of the TBs to the terminal, and for at least one transmission time point predetermined after the TB including the size information is successfully transmitted to the terminal, subsequent at least one packet according to the next TB size The base station apparatus, characterized in that it comprises a transceiver for transmitting a TB comprising a. The method of claim 28, wherein the next TB size, The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. The method of claim 29, wherein the size of the next packet, The base station apparatus, characterized in that the size of the buffered packet to be transmitted at the next transmission time or the predetermined expected packet size. In the method for receiving packets of variable size in a mobile communication system, Receiving a TB having a transport block (TB) size signaled by the base station from the base station, determining whether the TB includes size information indicating a next TB size of the base station; If the size information is included, extracting a part of the packet from the TB and notifying the base station that the TB including the size information has been successfully received; Receiving at least one subsequent packet from the base station according to the next TB size. 32. The method of claim 31, wherein the next TB size is The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. 33. The method of claim 32, wherein the size of the next packet is And the size of the buffered packet to be transmitted at the next transmission time or the predetermined expected packet size. A terminal device for receiving packets of variable size in a mobile communication system, A receiving unit for receiving a TB having a transport block (TB) size signaled by the base station from the base station; If the TB includes size information indicating the next TB size of the base station, the base station extracts a portion of the packet from the TB and notifies the base station that the TB including the size information has been successfully received. And a control unit controlling the receiving unit to receive at least one subsequent packet from the base station according to a TB size. 35. The method of claim 34, wherein the next TB size is The size of the next packet, the size (h) of the header included in each TB, the size (s) of the size information, and the excess size (k) of the packet, the excess size is the TB size And a difference between the expected packet size and the size of the packet. 36. The method of claim 35, wherein the size of the next packet is And a size of a buffered packet to be transmitted at a next transmission time or the predetermined packet size. In the method for transmitting packets of variable size in a mobile communication system, Determining whether a packet generated in a service logical channel is divided and transmitted; If a packet generated in the logical channel is divided and transmitted, a buffer status report message including at least a buffer status of the logical channel is configured to request an additional transmission resource for the remaining divided packets of the logical channel to the base station. A transmission method comprising the step of transmitting. 38. The method of claim 37, wherein the determining comprises: And determining that the buffer status report message is to be generated when the remaining portion of the packet stored in the buffer of the logical channel cannot be transmitted and the remaining portion is larger than a predetermined reference value. The method of claim 37, wherein the buffer status report message, And a buffer state of at least one logical channel having a higher priority than the logical channel. A terminal apparatus for transmitting packets of variable size in a mobile communication system, If a packet generated in the service logical channel is divided and transmitted, the control unit constituting a buffer status report message including at least the buffer status of the logical channel to request additional transmission resources for the remaining divided packets of the logical channel Wow, And a transmitter for transmitting the buffer status report message to a base station. The method of claim 40, wherein the control unit, And a remaining part of the packet stored in the buffer of the logical channel that cannot be transmitted and remains, and determines that the buffer status report message is generated when the remaining part has a size larger than or equal to a predetermined reference value. 41. The method of claim 40, wherein the buffer status report message, And a buffer state of at least one logical channel having a higher priority than the logical channel.

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