KR20220116956A - Method and appratus for packet miltiplexing transmission in communication system - Google Patents

Abstract

A packet multiplexing transmission technology in a communication system is disclosed. Provided is the packet multiplexing transmission method in a communication system, which includes the steps of: receiving multiplexing configuration information from a base station when configuring a DRB; multiplexing a plurality of packets having the same DRB through a PDCP layer according to the multiplexing setting information when the uplink packets are generated; generating a PDCP PDU by adding a PDCP header to multiplexed data; and transmitting a message including the PDCP PDU to the base station. Therefore, it is possible to prevent generation of load by preventing a lower layer from generating a lower layer header for each packet.

Description

Method and apparatus for multiplexing packet transmission in a communication system

The present invention relates to a packet multiplexing transmission technique in a communication system, and more particularly, to a packet multiplexing transmission technique for multiplexing and transmitting packets in a Packet Data Convergence Protocol (PDCP) layer.

All mobile communication packets can transmit data to each counterpart layer. A communication system of a 3rd generation partnership project (3GPP) may be configured with MAC (Medium Access Control)/RLC (Radio Resource Control)/PDCP (Packet Data Convergence Protocol)/SDAP (Service Data Adaptation Protocol) layers. Here, the MAC layer may perform media control, the RLC layer may perform radio link control, the PDCP layer may process packet unit data, and the SDAP layer may manage Quality of Service (QoS). have.

Next-generation mobile communication may be M2M (Machine 2 Machine) communication in which numerous things are connected. All packets may be attached by generating a PDCP header in the PDCP layer, and may be delivered to the RLC layer, which is a lower layer. The RLC layer may deliver data received from the PDCP layer to the MAC layer. Such packet unit processing may cause a problem of producing a layer header in each packet in all layers. In particular, although M2M data consists of small-sized data, it may have a separate header. In particular, a packet requiring acknowledgment such as Transmission Control Protocol (TCP)/Stream Control Transmission Protocol (SCTP) may be transmitted by adding an SDAP header, a PDCP header, an RLC header, and a MAC header. In this case, the RLC layer and the MAC layer may require a process of executing a timer per packet for a predetermined time to be processed.

An object of the present invention to solve the above problems is to provide a packet multiplexing transmission method and apparatus that enables the PDCP layer to multiplex and transmit packets in uplink transmission and downlink transmission.

A packet multiplexing transmission method in a communication system according to a first embodiment of the present invention for achieving the above object is an operating method of a terminal of the communication system, wherein the base station receives multiplexing configuration information when setting a DRB (Data Radio Bearer). step; multiplexing a plurality of packets having the same DRB according to the multiplexing configuration information through a PDCP layer when uplink packets are generated; generating a PDCP protocol data unit (PDU) by adding a PDCP header to the multiplexed data; and transmitting a message including the PDCP PDU to the base station.

According to the present invention, when uplink packets are generated by receiving multiplexing configuration information from the base station when the terminal configures the DRB, the DRB multiplexes a plurality of identical packets through the PDCP layer to generate a PDCP PDU.

In addition, according to the present invention, next-generation mobile communication is M2M, and communication between objects is composed of packets and can be processed in packet units. Load generation can be prevented by preventing the layer from producing a lower layer header in each packet.

In addition, according to the present invention, a plurality of packets requiring a response such as TCP/SCTP can be transmitted by adding an SDAP header, a PDCP header, an RLC header, and a MAC header, respectively. It is possible to prevent load generation by preventing the lower layer from producing a lower layer header in each packet by sending it.

1 is a conceptual diagram illustrating a first embodiment of a communication system.
2 is a block diagram showing a first embodiment of a communication node constituting a communication system.
3 is a block diagram illustrating a first embodiment of a protocol structure of a 5G network.
4 is a flowchart of a method for transmitting multiplexed packets in an uplink according to the first embodiment.
5A is a conceptual diagram illustrating PDCP PDUs having 12-bit SNs to which packet multiplexing is not applied.
5B is a conceptual diagram illustrating a PDCP PDU having a 12-bit SN to which packet multiplexing is applied.
6A is a conceptual diagram illustrating PDCP PDUs having 18-bit SNs to which packet multiplexing is not applied.
6B is a conceptual diagram illustrating a PDCP PDU having an 18-bit SN to which packet multiplexing is applied.
7 is a flowchart of a downlink packet multiplexing transmission method according to the first embodiment.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may also be referred to as a first component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it may be directly connected or connected to the other component, but it is understood that other components may exist in between. it should be On the other hand, when it is said that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. In describing the present invention, in order to facilitate the overall understanding, the same reference numerals are used for the same components in the drawings, and duplicate descriptions of the same components are omitted.

1 is a conceptual diagram illustrating a first embodiment of a communication system.

1, the communication system 100 is a plurality of communication nodes (110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6). A plurality of communication nodes are 4G communication (eg, long term evolution (LTE), LTE-A (advanced)) defined in 3GPP (3rd generation partnership project) standard, 5G communication (eg, NR (new radio)) ) can be supported. 4G communication may be performed in a frequency band of 6 GHz or less, and 5G communication may be performed in a frequency band of 6 GHz or more as well as a frequency band of 6 GHz or less.

For example, a plurality of communication nodes for 4G communication and 5G communication is a CDMA (code division multiple access) based communication protocol, WCDMA (wideband CDMA) based communication protocol, TDMA (time division multiple access) based communication protocol, FDMA (frequency division multiple access) based communication protocol, OFDM (orthogonal frequency division multiplexing) based communication protocol, Filtered OFDM based communication protocol, CP (cyclic prefix)-OFDM based communication protocol, DFT-s-OFDM (discrete) Fourier transform-spread-OFDM) based communication protocol, OFDMA (orthogonal frequency division multiple access) based communication protocol, SC (single carrier)-FDMA based communication protocol, NOMA (Non-orthogonal multiple access), GFDM (generalized frequency) Division multiplexing)-based communication protocol, FBMC (filter bank multi-carrier)-based communication protocol, UFMC (universal filtered multi-carrier)-based communication protocol, SDMA (Space Division Multiple Access)-based communication protocol, etc. can be supported. .

Also, the communication system 100 may further include a core network. When the communication system 100 supports 4G communication, the core network may include a serving-gateway (S-GW), a packet data network (PDN)-gateway (P-GW), a mobility management entity (MME), and the like. have. When the communication system 100 supports 5G communication, the core network may include a user plane function (UPF), a session management function (SMF), an access and mobility management function (AMF), and the like.

On the other hand, a plurality of communication nodes (110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-) constituting the communication system 100 4, 130-5, 130-6) may each have the following structure.

2 is a block diagram showing a first embodiment of a communication node constituting a communication system.

Referring to FIG. 2 , the communication node 200 may include at least one processor 210 , a memory 220 , and a transceiver 230 connected to a network to perform communication. In addition, the communication node 200 may further include an input interface device 240 , an output interface device 250 , a storage device 260 , and the like. Each of the components included in the communication node 200 may be connected by a bus 270 to communicate with each other.

However, each of the components included in the communication node 200 may not be connected to the common bus 270 but to the processor 210 through an individual interface or an individual bus. For example, the processor 210 may be connected to at least one of the memory 220 , the transceiver 230 , the input interface device 240 , the output interface device 250 , and the storage device 260 through a dedicated interface. .

The processor 210 may execute a program command stored in at least one of the memory 220 and the storage device 260 . The processor 210 may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. Each of the memory 220 and the storage device 260 may be configured as at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 220 may be configured as at least one of a read only memory (ROM) and a random access memory (RAM).

Referring back to FIG. 1 , the communication system 100 includes a plurality of base stations 110 - 1 , 110 - 2 , 110 - 3 , 120 - 1 and 120 - 2 , and a plurality of terminals 130 - 1, 130-2, 130-3, 130-4, 130-5, 130-6). base stations 110-1, 110-2, 110-3, 120-1, 120-2 and terminals 130-1, 130-2, 130-3, 130-4, 130-5, 130-6 The comprising communication system 100 may be referred to as an “access network”. Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may form a macro cell. Each of the fourth base station 120-1 and the fifth base station 120-2 may form a small cell. The fourth base station 120-1, the third terminal 130-3, and the fourth terminal 130-4 may belong to the cell coverage of the first base station 110-1. The second terminal 130-2, the fourth terminal 130-4, and the fifth terminal 130-5 may belong to the cell coverage of the second base station 110-2. The fifth base station 120-2, the fourth terminal 130-4, the fifth terminal 130-5, and the sixth terminal 130-6 may belong to the cell coverage of the third base station 110-3. have. The first terminal 130-1 may belong to the cell coverage of the fourth base station 120-1. The sixth terminal 130-6 may belong to the cell coverage of the fifth base station 120-2.

Here, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 is a NodeB (NodeB), an advanced NodeB (evolved NodeB), gNB, and a base transceiver station (BTS). ), a radio base station, a radio transceiver, an access point, an access node, and the like. Each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, 130-6 includes a user equipment (UE), a terminal, an access terminal, and a mobile terminal. It may be referred to as a mobile terminal, a station, a subscriber station, a mobile station, a portable subscriber station, a node, a device, and the like.

Meanwhile, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may operate in different frequency bands or may operate in the same frequency band. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to each other through an ideal backhaul link or a non-ideal backhaul link. , information can be exchanged with each other through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to the core network through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 transmits a signal received from the core network to the corresponding terminals 130-1, 130-2, 130-3, 130 -4, 130-5, 130-6), and the signal received from the corresponding terminal (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) is transmitted to the core network can be sent to

In addition, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 is MIMO (Multiple Antenna Technology, Multiple Input Multiple Output) transmission (eg, single user (SU) )-MIMO, MU (multi user)-MIMO, massive MIMO, etc.), CoMP (coordinated multipoint) transmission, CA (carrier aggregation) transmission, transmission in an unlicensed band, direct communication between terminals (device to device communication, D2D) (or Proximity services (ProSe)) and the like may be supported. Here, each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, 130-6 is the base station 110-1, 110-2, 110-3, and 120-1. , 120-2) and operations supported by the base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be performed. For example, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 based on the SU-MIMO method, and the fourth terminal 130-4 may transmit a signal based on the SU-MIMO method. A signal may be received from the second base station 110 - 2 . Alternatively, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 and the fifth terminal 130-5 based on the MU-MIMO scheme, and the fourth terminal 130-4. and each of the fifth terminals 130 - 5 may receive a signal from the second base station 110 - 2 by the MU-MIMO method.

Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may transmit a signal to the fourth terminal 130-4 based on the CoMP method, and the fourth The terminal 130-4 may receive signals from the first base station 110-1, the second base station 110-2, and the third base station 110-3 by the CoMP method. A plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) each of the terminals (130-1, 130-2, 130-3, 130-4) belonging to its own cell coverage , 130-5, 130-6) and the CA method can transmit and receive signals. Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 controls D2D between the fourth terminal 130-4 and the fifth terminal 130-5. and each of the fourth terminal 130-4 and the fifth terminal 130-5 may perform D2D under the control of the second base station 110-2 and the third base station 110-3, respectively. .

3 is a block diagram illustrating a first embodiment of a protocol structure of a 5G network.

Referring to FIG. 3, the protocol structure of the 5G communication network may include a PHY (physical) layer 321, a MAC layer 322, an RLC layer 323, a PDCP layer 324, and an SDAP layer 325. . The PHY layer may transmit data to an upper layer of an access stratum (AS) protocol using a physical channel. The physical channel may transmit data to an upper layer of the AS protocol using a data modulation scheme such as orthogonal frequency division multiplexing (OFDM). The PHY layer utilizes radio resources and may specifically utilize time resources and frequency resources. The PHY layer may be connected to the MAC layer through a transport channel. The MAC layer may map a logical channel and a physical channel. The MAC layer may generate a transport block by multiplexing a MAC service data unit (MAC SDU). The MAC layer may deliver a transport block through the PHY layer, and may obtain a MAC SDU by demultiplexing the transport block received through the PHY layer. In addition, the MAC layer may correct an error through a hybrid automatic repeat request (HARQ) function.

The RLC layer may operate in one of an operation mode of a transport mode (TM), an unacknowledged mode (UM), and an acknowledged mode (AM) in order to guarantee various QoS required by a plurality of radio bearers. In addition, the RLC layer may correct an error through an automatic repeat request (ARQ) function.

The PDCP layer may sequentially deliver user data and may perform header compression and encryption functions. The SDAP layer may map QoS flows.

4 is a flowchart of a method for transmitting multiplexed packets in an uplink according to the first embodiment.

Referring to FIG. 4 , in the uplink packet multiplexing transmission method, the terminal may receive multiplexing configuration information through an RRC (Radio Resource Control) message when the base station configures the DRB (S401). In this case, the multiplexing configuration information that the terminal receives from the base station may include whether packet multiplexing transmission is used in the PDCP layer and information on the maximum PDCP PDU multiplexing size. Here, the maximum PDCP PDU multiplexing size may be set in the base station according to the performance and radio state of the terminal.

Meanwhile, the PDCP layer of the terminal may receive a plurality of data (PDCP SDUs) from the SDAP layer when an uplink packet is generated ( S402 ). In addition, if the PDCP layer is configured to use packet multiplexing transmission in the multiplexing configuration information, a plurality of data having the same DRB received from the SDAP layer can be transmitted within a multiplexing limit range (that is, within a range that satisfies the maximum PDCP PDU multiplexing size). ) to generate a multiplexed data unit (S403). In this case, if the PDCP layer of the UE is configured to use the uplink data compression method in the PDCP layer by the RRC message, the multiplexed data unit may be compressed using the uplink data compression method. In addition, the PDCP layer of the terminal may perform integrity protection for the multiplexed data unit if integrity protection is configured by the base station. In addition, the PDCP layer of the terminal may encrypt the multiplexed data unit using the encryption key received from the base station when setting the DRB.

Then, the PDCP layer of the terminal may generate a PDCP header and add the PDCP header to the multiplexed data unit to generate a PDCP PDU (S404). Accordingly, a plurality of data received by the PDCP layer from the SDAP layer may be packet-multiplexed to have the same PDCP sequence number (SN) and the same counter (COUNT) value.

5A is a structural diagram illustrating PDCP PDUs having 12-bit SNs to which packet multiplexing is not applied, and FIG. 5B is a structural diagram illustrating PDCP PDUs having 12-bit SNs to which packet multiplexing is applied.

Referring to FIG. 5A , the first bit 501a of the first octet of the structure of a plurality of PDCP PDUs 500a-1 to 500a-3 having a 12-bit SN to which packet multiplexing is not applied is D/ The C bit may indicate whether PDCP data is user data or control data. In addition, the second bit to the fourth bit 502a of the first octet of the structure of the plurality of PDCP PDUs 500a-1 to 500a-3 may be reserved bits, and from the fifth bit of the first octet to the next Up to octet 503a is a bit representing the PDCP SN, and may be 12 bits. Subsequently, data may be included in the data block 504a of the plurality of PDCP PDUs 500a-1 to 500a-3, and the last part 505a of the data block 504a contains MAC-I ( Message Authentication Code-Integrity) code may be included.

On the other hand, referring to FIG. 5B , the first bit 501b of the first octet of the structure of the PDCP PDU 500b having a 12-bit SN to which packet multiplexing is applied is a D/C bit, indicating whether PDCP data is user data or control data. can tell you In addition, the second bit and the third bit 502b of the first octet of the structure of the PDCP PDU 500b may be reserved bits, and the fourth bit 502bb may be a bit for indicating whether packet multiplexing is applied. . For example, the fourth bit 502bb is set to 1, and the terminal or the base station may recognize that packet multiplexing is applied. Subsequently, from the fifth bit to the next octet 503b of the first octet of the PDCP PDU 500b, the bits representing the PDCP SN may be 12 bits. In addition, the third to eighth octet 503ba of the PDCP PDU 500b is a bit indicating packet multiplexing information and may include packet length information of each data packet multiplexed. The data block 504b of the PDCP PDU 500b may include packet-multiplexed data, and the last part 505b of the data block 504b may include a MAC-I code for integrity protection.

6A is a structural diagram illustrating PDCP PDUs having 18-bit SNs to which packet multiplexing is not applied, and FIG. 6B is a structural diagram illustrating PDCP PDUs having 18-bit SNs to which packet multiplexing is applied.

Referring to FIG. 6A , the first bit 601a of the first octet of the structure of a plurality of PDCP PDUs 600a-1 to 600a-3 having an 18-bit SN to which packet multiplexing is not applied is a D/C bit. It can indicate whether the data is user data or control data. In addition, the second to sixth bits 602a of the first octet of the structure of the plurality of PDCP PDUs 600a-1 to 600a-3 may be reserved bits, and the seventh bit 603a of the first octet ) to the third octet are bits representing the PDCP SN, and may be 18 bits. Subsequently, data may be included in the data block 604a of the plurality of PDCP PDUs 600a-1 to 600a-3, and the last part 605a of the data block 604a contains MAC-I ( Message Authentication Code-Integrity) code may be included.

On the other hand, referring to FIG. 6B , the first bit 601b of the first octet of the structure of the PDCP PDU 600b having an 18-bit SN to which packet multiplexing is applied is a D/C bit, indicating whether PDCP data is user data or control data. can tell you In addition, the second to fifth bit 602b of the first octet of the structure of the PDCP PDU 600b may be a reserved bit, and the sixth bit 602bb may be a bit for indicating packet multiplexing information. For example, the sixth bit 602bb is set to 1, and the terminal or the base station may recognize that packet multiplexing is applied. Subsequently, from the seventh bit to the third octet 603b of the first octet of the PDCP PDU 600b may be 18 bits as a bit indicating the PDCP SN. In addition, from the fourth octet to the tenth octet 603ba of the PDCP PDU 600b is a bit indicating packet multiplexing information, and may include packet length information of each data packet multiplexed. The data block 604b of the PDCP PDU 600b may include packet-multiplexed data, and the last part 605b of the data block 604b may include a MAC-I code for integrity protection.

Referring back to FIG. 4 , the PDCP layer of the UE may transmit the packet-multiplexed PDCP PDU to the RLC layer (S405). Then, the RLC layer may generate an RLC PDU by performing the RLC function, and may transmit the RLC PDU to the MAC layer. The MAC layer may generate a MAC PDU by performing a MAC function, and may transmit the MAC PDU to the PHY layer. The PHY layer may generate a PHY PDU by performing a PHY function, and may transmit the PHY PDU to the base station. As such, the RLC layer may transmit the packet-multiplexed PDCP PDU to the base station through the MAC layer and the PHY layer (S406). Accordingly, the PHY layer of the base station may generate a MAC PDU by removing the PHY header by performing a PHY function on the PHY PDU received from the terminal, and may transmit the MAC PDU to the MAC layer. The MAC layer may generate an RLC PDU by removing the MAC header by performing the MAC function, and may transmit the RLC PDU to the RLC layer. The RLC layer may generate a PDCP PDU by removing the RLC header by performing the RLC function, and may transmit the PDCP PDU to the PDCP layer. As such, the PDCP layer of the base station can receive the packet-multiplexed PDCP PDU through the PHY layer, the MAC layer, and the RLC layer. In addition, the PDCP layer of the base station may separate the received packet-multiplexed PDCP PDU by data after removing the PDCP header. The PDCP layer of the base station may deliver each separated data to the SDAP layer.

7 is a flowchart of a downlink packet multiplexing transmission method according to the first embodiment.

Referring to FIG. 7 , in the downlink packet multiplexing transmission method, the PDCP layer of the base station may receive a plurality of data (PDCP SDUs) from the SDAP layer when a downlink packet is generated ( S701 ).

And, if the PDCP layer is configured to use packet multiplexing transmission, multiplex a plurality of data having the same DRB received from the SDAP layer within the multiplexing limit range (that is, within the range that satisfies the maximum PDCP PDU multiplexing size) data unit may be generated (S702). In this case, if the PDCP layer of the base station is configured to use the downlink data compression method in the PDCP layer by the RRC message, the multiplexed data unit may be compressed using the downlink data compression method. In addition, the PDCP layer of the base station may perform integrity protection on the multiplexed data unit if integrity protection is set, and may perform encryption of the multiplexed data unit using the encryption key set when setting the DRB. Then, the PDCP layer of the base station may generate a PDCP header and add the PDCP header to the multiplexed data unit to generate a PDCP PDU (S703).

On the other hand, the PDCP layer of the base station may deliver the multiplexed PDCP PDU to the RLC layer (S704). Then, the RLC layer may generate an RLC PDU by performing the RLC function, and may transmit the RLC PDU to the MAC layer. The MAC layer may generate a MAC PDU by performing a MAC function, and may transmit the MAC PDU to the PHY layer. The PHY layer may generate a PHY PDU by performing a PHY function, and may transmit the PHY PDU to the terminal. As such, the RLC layer may transmit the packet-multiplexed PDCP PDU to the UE through the MAC layer and the PHY layer (S705). Accordingly, the PHY layer of the terminal may generate a MAC PDU by removing the PHY header by performing a PHY function on the PHY PDU received from the base station, and may transmit the MAC PDU to the MAC layer. The MAC layer may generate an RLC PDU by removing the MAC header by performing the MAC function, and may transmit the RLC PDU to the RLC layer. The RLC layer may generate a PDCP PDU by removing the RLC header by performing the RLC function, and may transmit the PDCP PDU to the PDCP layer. As such, the PDCP layer of the UE may receive the packet-multiplexed PDCP PDU through the PHY layer, the MAC layer, and the RLC layer. In addition, the PDCP layer of the terminal may separate the received packet-multiplexed PDCP PDU by data after removing the PDCP header. The PDCP layer of the UE may deliver each separated data to the SDAP layer.

The methods according to the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the computer readable medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the art of computer software. Examples of computer-readable media may include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions may include not only machine language codes such as those generated by a compiler, but also high-level language codes that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as at least one software module to perform the operations of the present invention, and vice versa.

In addition, the above-described method or apparatus may be implemented by combining all or part of its configuration or function, or may be implemented separately.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention as set forth in the claims below. You will understand that it can be done.

Claims (1)

A method of operating a terminal of a communication system, comprising:
Receiving multiplexing configuration information in a base station when configuring a DRB (Data Radio Bearer);
multiplexing a plurality of packets having the same DRB according to the multiplexing configuration information through a Packet Data Convergence Protocol (PDCP) layer when uplink packets are generated;
generating a PDCP protocol data unit (PDU) by adding a PDCP header to the multiplexed data; and
and transmitting a message including the PDCP PDU to the base station.

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