WO2019127289A1 - Procédé de transmission de données et équipement terminal - Google Patents

Procédé de transmission de données et équipement terminal Download PDF

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Publication number
WO2019127289A1
WO2019127289A1 PCT/CN2017/119600 CN2017119600W WO2019127289A1 WO 2019127289 A1 WO2019127289 A1 WO 2019127289A1 CN 2017119600 W CN2017119600 W CN 2017119600W WO 2019127289 A1 WO2019127289 A1 WO 2019127289A1
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WO
WIPO (PCT)
Prior art keywords
terminal device
logical channel
drb
data transmission
indication information
Prior art date
Application number
PCT/CN2017/119600
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English (en)
Chinese (zh)
Inventor
石聪
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2017/119600 priority Critical patent/WO2019127289A1/fr
Priority to CN201780050516.9A priority patent/CN109691170A/zh
Publication of WO2019127289A1 publication Critical patent/WO2019127289A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the embodiments of the present application relate to the field of communications, and, more particularly, to a method and a terminal device for transmitting data.
  • DRBs can be configured to support the copy data transmission function of the Packet Data Convergence Protocol (PDCP), or the PDCP replication data transmission function.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • the default state of the PDCP copy data transmission function is directly used for data transmission, which is not flexible enough.
  • the embodiment of the present application provides a method and terminal device for transmitting data, which is beneficial to improving flexibility of data transmission.
  • the first aspect provides a method for transmitting data, where the method includes: receiving, by the terminal device, indication information sent by the network device, where the indication information is used to indicate that the replication data transmission function of the first data radio bearer DRB is deactivated; the terminal device According to the indication information, data transmission by the first logical channel configured for the first DRB is suspended.
  • the terminal device activates the replication data transmission function of a certain DRB according to the indication of the network device, and suspends data transmission on a logical channel configured for the DRB, thereby facilitating the flexibility of data transmission.
  • the solution in the embodiment of the present application may be applied to a scenario of uplink data transmission, and may also be applied to a device-to-device (D2D) communication scenario.
  • D2D device-to-device
  • the deduplication of a DRB replication data transmission function means that the DRB is configured with a replication data transmission function, that is, at least two logical channels are configured for the DRB to transmit the replication data. After deactivation, data transmission can be performed using only one logical channel of the DRB.
  • the terminal device suspends data transmission by using the first logical channel configured for the first DRB according to the indication information, including: the terminal device suspending the use of the received information according to the indication information.
  • the uplink grant information is used to transmit data through the first logical channel.
  • the method before the terminal device receives the indication information sent by the network device, the method further includes: the terminal device by using the first logical channel and a second logical channel configured for the first DRB Transfer the copied data.
  • the terminal device performs the transmission of the duplicate data by using the first logical channel and the second logical channel configured for the first DRB, where the terminal device uses the first through the first logical channel.
  • the set of carriers performs transmission of the replicated data and the transmission of the replicated data using the second set of carriers over the second logical channel.
  • the first carrier set and the second carrier set do not overlap.
  • the first logical channel is specified by the network device by signaling.
  • the first logical channel is a logical channel that uses only the secondary carrier for replica data transmission when the replica data transmission function of the first DRB is in an active state.
  • the method further includes: the terminal device passes the first The second logical channel configured by the DRB performs data transmission.
  • the terminal device may use any carrier set or a partial carrier set of all carrier sets to transmit data through the second logical channel.
  • the second logical channel is a logical channel that uses a primary carrier for replica data transmission when the replica data transmission function of the first DRB is in an active state.
  • the terminal device receives the indication information sent by the network device, where the terminal device receives the network device and sends the device through a Media Access Control (MAC) control element (Control Element, CE).
  • MAC Media Access Control
  • CE Control Element
  • a terminal device for performing the method of any of the above first aspect or any of the possible implementations of the first aspect.
  • the terminal device comprises means for performing the method of any of the above-described first aspect or any of the possible implementations of the first aspect.
  • a terminal device comprising: a memory, a processor, an input interface, and an output interface.
  • the memory, the processor, the input interface, and the output interface are connected by a bus system.
  • the memory is for storing instructions for executing the memory stored instructions for performing the method of any of the first aspect or the first aspect of the first aspect.
  • a computer storage medium for storing computer software instructions for performing the method of any of the above first aspect or any of the possible implementations of the first aspect, comprising program.
  • a computer program product comprising instructions, when executed on a computer, causes the computer to perform the method of any of the first aspect or the optional implementation of the first aspect.
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.
  • FIG. 2 shows a protocol architecture diagram of duplicate data transmission in a carrier aggregation scenario.
  • FIG. 3 shows a schematic block diagram of a method of transmitting data in an embodiment of the present application.
  • FIG. 4 shows a schematic block diagram of a terminal device of an embodiment of the present application.
  • FIG. 5 is another schematic block diagram of a terminal device according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • UMTS Universal Mobile Telecommunication System
  • WiMAX Worldwide Interoperability for Microwave Access
  • the technical solutions of the embodiments of the present application can be applied to various communication systems based on non-orthogonal multiple access technologies, such as a sparse code multiple access (SCMA) system, and a low-density signature (Low). Density Signature (LDS) system, etc., of course, the SCMA system and the LDS system may also be referred to as other names in the communication field; further, the technical solution of the embodiment of the present application can be applied to multi-carrier using non-orthogonal multiple access technology.
  • SCMA sparse code multiple access
  • LDS Density Signature
  • Orthogonal Frequency Division Multiplexing OFDM
  • Filter Bank Multi-Carrier FBMC
  • General Frequency Division Multiplexing Generalized Frequency Division Multiplexing (OFDM)) Frequency Division Multiplexing (GFDM)
  • Filtered Orthogonal Frequency Division Multiplexing Filtered-OFDM, F-OFDM
  • the terminal device in the embodiment of the present application may refer to a user equipment (User Equipment, UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, and a wireless device.
  • Communication device user agent or user device.
  • the access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), with wireless communication.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the network device in the embodiment of the present application may be a device for communicating with a terminal device, where the network device may be a Base Transceiver Station (BTS) in GSM or CDMA, or may be a base station (NodeB, NB) in a WCDMA system. And may be an evolved base station (eNB or eNodeB) in the LTE system, or may be a wireless controller in a cloud radio access network (CRAN) scenario, or the network device may be The embodiments of the present application are not limited to the relay station, the access point, the in-vehicle device, the wearable device, and the network device in the future 5G network or the network device in the future evolved PLMN network.
  • BTS Base Transceiver Station
  • NodeB NodeB
  • NB base station
  • CRAN cloud radio access network
  • the embodiments of the present application are not limited to the relay station, the access point, the in-vehicle device, the wearable device, and the network device in the future 5G network or
  • FIG. 1 is a schematic diagram of an application scenario of an embodiment of the present application.
  • the communication system in FIG. 1 may include a terminal device 10 and a network device 20.
  • the network device 20 is configured to provide communication services for the terminal device 10 and access the core network.
  • the terminal device 10 accesses the network by searching for synchronization signals, broadcast signals, and the like transmitted by the network device 20, thereby performing communication with the network.
  • the arrows shown in FIG. 1 may represent uplink/downlink transmissions by a cellular link between the terminal device 10 and the network device 20.
  • the uplink PDCP data replication function can be configured based on the DRB, that is, different DRBs can be configured to support PDCP replication data transmission, or not to configure PDCP replication data transmission.
  • DRB different DRBs can be configured to support PDCP replication data transmission, or not to configure PDCP replication data transmission.
  • CA carrier aggregation
  • the solution for supporting replicated data transmission is to use PDCP's duplicate data transmission function to transmit duplicated PDCP PDUs to two RLC entities (two different logical channels), and finally guarantee The replicated PDCP PDUs can be transmitted on different physical layer aggregated carriers to achieve frequency diversity gain to improve data transmission reliability.
  • the specific protocol structure is shown in Figure 2.
  • the PDCP layer has a split bearer replication function, and data replication of a PDCP Service Data Unit (SDU) is encapsulated into PDCP PDU1 and PDCP PDU2, and PDCP PDU1 and PDCP PDU2 have the same content, that is, bearer.
  • SDU Service Data Unit
  • the data payload and the header header are the same.
  • PDCP PDU1 and PDCP PDU2 are respectively mapped to different RLC entities, and the RLC entity puts PDCP PDU1 and PDCP PDU2 on different logical channels (logical channel 1 and logical channel 2), and for the MAC, which logical channels are known
  • the replicated data is transmitted on different carriers, for example, the replicated data carried in the logical channel 1 is transmitted on the physical carrier 1, and the replicated data carried in the logical channel 2 is physically Transmission on carrier 2.
  • the PDCP layer copy data transmission can effectively improve the reliability of data transmission by using the diversity gain, how to flexibly use the PDCP copy data transmission function is a problem to be solved.
  • system and “network” are used interchangeably herein.
  • the term “and/or” in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations.
  • the character "/" in this article generally indicates that the contextual object is an "or" relationship.
  • FIG. 3 shows a schematic block diagram of a method 100 of transmitting data in an embodiment of the present application. As shown in FIG. 3, the method 100 includes some or all of the following:
  • the terminal device receives the indication information sent by the network device, where the indication information is used to indicate that the replication data transmission function of the first data radio bearer DRB is deactivated.
  • the terminal device suspends data transmission by using the first logical channel configured for the first DRB according to the indication information.
  • the network device can support the replication data transmission function for a certain DRB configuration, that is, the network device can configure one PDCP entity to associate two RLC entities (two logical channels) for a certain DRB, and the network device can also determine the network device. Whether a DRB needs to activate the duplicate data transfer function. For example, the network device can determine whether the data transmission has reliability requirements according to the current service.
  • the network device may send an indication indication to the terminal device, for example, may indicate to the terminal device by using the MAC CE. After receiving the indication information sent by the network device, the terminal device may suspend a logical channel according to the indication information, that is, suspend data transmission through a logical channel of the DRB.
  • the method for transmitting data in the embodiment of the present application is advantageous for improving the flexibility of data transmission.
  • the network device may configure the duplicate data transmission function as shown in FIG. 2 for the first DRB in the embodiment of the present application, that is, configure the first logical channel and the second logical channel for the first DRB, where the network device Before the terminal device sends the indication information to deactivate the duplicate data transmission function of the first DRB, the network device may perform the transmission of the duplicate data through the first logical channel and the second logical channel. For example, PDCP PDU1 may be transmitted in logical channel 1 in FIG. 2, and PDCP PDU1 may be transmitted in logical channel 2.
  • the terminal device performs the transmission of the duplicate data by using the first logical channel and the second logical channel configured for the first DRB, where the terminal device uses the first carrier set to perform data replication by using the first carrier set. Transmitting and transmitting the replicated data using the second set of carriers over the second logical channel.
  • the terminal device may receive configuration information of the network device, where the configuration information may instruct the terminal device to use the first carrier set and the second carrier set to perform data transmission, and it should be understood that when the first DRB activates the duplicate data transmission function,
  • the first logical channel of the first DRB may be mapped to the first set of carriers, and the second logical channel of the first DRB may be mapped to the second set of carriers, that is, after receiving the uplink grant information, the terminal device may
  • the transmission of the replica data is performed by using the first carrier set by the first logical channel, and the transmission of the replica data may be performed by using the second carrier set by the second logical channel.
  • the carrier set may include at least one carrier.
  • the carrier included in the first carrier set and the carrier included in the second carrier set may not overlap.
  • the terminal device pauses data transmission by using the first logical channel configured for the first DRB according to the indication information, including: the terminal device suspends use and receive according to the indication information.
  • the uplink authorization information that arrives is transmitted through the first logical channel.
  • the terminal device after the terminal device receives the indication information, the terminal device no longer performs data transmission through the first logical channel according to the received uplink authorization information.
  • the first logical channel that is suspended by the terminal device may be specified by the network device, for example, the network device may send, to the terminal device, a replication data transmission function indicating that the first DRB is deactivated. The first logical channel is also indicated. The network device may also not specify the first logical channel to the terminal device. After receiving the indication information, the terminal device may temporarily suspend the use of only the secondary carrier for replication when the copy data transmission function of the first DRB is in an active state.
  • Logical channel for data transmission For example, in the above example, the first logical channel uses the first carrier set when the replica data transmission function of the first DRB is in an active state, and the first carrier set may be considered to include only the secondary carrier. It should be understood that the terminal device may also temporarily suspend the logical channel that uses the carrier set of the primary carrier to perform the data transmission of the replica when the data transmission function of the first DRB is in the active state, which is not limited in this embodiment.
  • the method further includes: the terminal device passes the The second logical channel of the first DRB configuration performs data transmission.
  • the network device configures the first logical channel and the second logical channel for the first DRB to perform the duplicate data transmission.
  • the terminal device may pause. Data is transmitted through the first logical channel, and data transmission is continued through the second logical channel. Further, after the terminal device deactivates the duplicate data transmission function of the first DRB, all carriers configured for the terminal device can be used to transmit data, that is, the terminal device can continue to use the second logical channel as the All carriers or part of carriers configured by the terminal device transmit data.
  • the second logical channel is a logical channel that uses the primary carrier for copy data transmission when the duplicate data transmission function of the first DRB is in an active state.
  • the second logical channel uses the second carrier set when the replica data transmission function of the first DRB is in the active state, and the second carrier set may be considered to include the primary carrier, and the second carrier set may further include at least one Secondary carrier.
  • the second logical channel may also be specified by the network device by signaling.
  • the network device may specify to suspend the first logical channel, and after receiving the deactivation command, the terminal device may directly transmit data through the second logical channel.
  • the network device directly specifies to transmit through the second logical channel, and after receiving the deactivation command, the terminal device directly suspends the first logical channel and performs data transmission through the second logical channel.
  • the terminal device receives the indication information sent by the network device, where the terminal device receives the indication information that is sent by the network device by using the MAC CE.
  • the network device may also indicate to the terminal device by using other signaling, for example, Downlink Control Information (DCI), and the embodiment of the present application is not limited thereto.
  • DCI Downlink Control Information
  • the size of the sequence numbers of the above processes does not mean the order of execution, and the order of execution of each process should be determined by its function and internal logic, and should not be implemented in the present application.
  • the implementation of the examples constitutes any limitation.
  • FIG. 4 shows a schematic block diagram of a terminal device 200 of an embodiment of the present application.
  • the terminal device 200 includes:
  • the receiving unit 210 is configured to receive indication information that is sent by the network device, where the indication information is used to indicate that the replication data transmission function of the first data radio bearer DRB is deactivated;
  • the processing unit 220 is configured to suspend transmission of data by using the first logical channel configured for the first DRB according to the indication information.
  • the terminal device of the embodiment of the present application is advantageous for improving flexibility of data transmission.
  • the processing unit is specifically configured to: suspend transmission of data by using the received uplink authorization information by using the first logical channel according to the indication information.
  • the terminal device further includes: a first sending unit, configured to pass the first logical channel and the first before the receiving unit receives the indication information sent by the network device
  • the second logical channel configured by the DRB performs transmission of the replicated data.
  • the sending unit is specifically configured to: use the first carrier set to perform transmission of the duplicate data by using the first logical channel, and use the second carrier set to perform data replication by using the second carrier set. transmission.
  • the first carrier set and the second carrier set do not overlap.
  • the first logical channel is specified by the network device by using signaling.
  • the first logical channel is a logical channel that uses only the secondary carrier for copy data transmission when the copy data transmission function of the first DRB is in an active state.
  • the terminal device further includes: a second sending unit, configured to: at the processing unit, suspend data transmission by using the first logical channel configured for the first DRB according to the indication information Thereafter, data is transmitted through the second logical channel configured for the first DRB.
  • a second sending unit configured to: at the processing unit, suspend data transmission by using the first logical channel configured for the first DRB according to the indication information Thereafter, data is transmitted through the second logical channel configured for the first DRB.
  • the second logical channel is a logical channel that uses the primary carrier for copy data transmission when the duplicate data transmission function of the first DRB is in an active state.
  • the receiving unit is specifically configured to: receive the indication information that is sent by the network device by using a media access control MAC control element CE.
  • terminal device 200 may correspond to the terminal device in the method embodiment of the present application, and the foregoing and other operations and/or functions of the respective units in the terminal device 200 respectively implement the terminal in the method of FIG.
  • the corresponding process of the device is not described here for brevity.
  • the embodiment of the present application further provides a terminal device 300, which may be the terminal device 200 in FIG. 4, which can be used to execute the content of the terminal device corresponding to the method 100 in FIG. .
  • the terminal device 300 includes an input interface 310, an output interface 320, a processor 330, and a memory 340.
  • the input interface 310, the output interface 320, the processor 330, and the memory 340 can be connected by a bus system.
  • the memory 340 is for storing programs, instructions or codes.
  • the processor 330 is configured to execute a program, an instruction or a code in the memory 340 to control the input interface 310 to receive a signal, control the output interface 320 to transmit a signal, and complete the operations in the foregoing method embodiments.
  • the terminal device of the embodiment of the present application is advantageous for improving flexibility of data transmission.
  • the processor 330 may be a central processing unit (CPU), and the processor 330 may also be other general-purpose processors, digital signal processors, application specific integrated circuits, and ready-made Program gate arrays or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, and more.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the memory 340 can include read only memory and random access memory and provides instructions and data to the processor 330. A portion of the memory 340 may also include a non-volatile random access memory. For example, the memory 340 can also store information of the device type.
  • each content of the above method may be completed by an integrated logic circuit of hardware in the processor 330 or an instruction in the form of software.
  • the content of the method disclosed in the embodiments of the present application may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory 340, and the processor 330 reads the information in the memory 340 and completes the contents of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.
  • the receiving unit in the terminal device 200 can be implemented by the input interface 310 in FIG. 5, and the first sending unit and the second sending unit of the terminal device 300 can be implemented by the output interface 320 in FIG.
  • the processing unit of terminal device 300 can be implemented by processor 330 in FIG.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • This functionality if implemented as a software functional unit and sold or used as a standalone product, can be stored on a computer readable storage medium.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Les modes de réalisation de la présente invention concernent un procédé de transmission de données et un équipement terminal, ledit procédé comprenant les étapes suivantes : un équipement terminal reçoit des informations d'instruction envoyées par un dispositif de réseau, lesdites informations d'instruction étant utilisées pour ordonner de désactiver les fonctions de duplication et de transmission de données d'un premier support radio de données (DRB) ; en fonction des informations d'instruction, l'équipement terminal suspend la transmission de données au moyen d'un premier canal logique configuré pour le premier DRB. Le procédé et l'équipement terminal des modes de réalisation de la présente invention améliorent la flexibilité d'une transmission de données.
PCT/CN2017/119600 2017-12-28 2017-12-28 Procédé de transmission de données et équipement terminal WO2019127289A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/CN2017/119600 WO2019127289A1 (fr) 2017-12-28 2017-12-28 Procédé de transmission de données et équipement terminal
CN201780050516.9A CN109691170A (zh) 2017-12-28 2017-12-28 传输数据的方法和终端设备

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Application Number Priority Date Filing Date Title
PCT/CN2017/119600 WO2019127289A1 (fr) 2017-12-28 2017-12-28 Procédé de transmission de données et équipement terminal

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Publication number Priority date Publication date Assignee Title
WO2021016776A1 (fr) * 2019-07-26 2021-02-04 Oppo广东移动通信有限公司 Procédé et dispositif basés sur une transmission de données en double
CN110856275B (zh) * 2019-11-07 2021-10-26 展讯通信（上海）有限公司 Drb的配置方法及相关装置
CN113572797B (zh) * 2020-04-29 2024-05-31 阿里巴巴集团控股有限公司 数据处理方法、装置、系统及电子设备

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CN102123512A (zh) * 2010-01-08 2011-07-13 捷讯研究有限公司 用于针对上行链路载波聚合进行逻辑信道优先化的方法和装置
CN103782569A (zh) * 2013-07-15 2014-05-07 华为技术有限公司 数据处理装置和方法
US20150215987A1 (en) * 2014-01-29 2015-07-30 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data using a plurality of carriers in mobile communication system

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
CN102123512A (zh) * 2010-01-08 2011-07-13 捷讯研究有限公司 用于针对上行链路载波聚合进行逻辑信道优先化的方法和装置
CN103782569A (zh) * 2013-07-15 2014-05-07 华为技术有限公司 数据处理装置和方法
US20150215987A1 (en) * 2014-01-29 2015-07-30 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving data using a plurality of carriers in mobile communication system

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