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WO2010131850A2 - Procédé et appareil d'émission et de réception de données doubles dans un système de communication sans fil multiporteuse - Google Patents

Procédé et appareil d'émission et de réception de données doubles dans un système de communication sans fil multiporteuse Download PDF

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Publication number
WO2010131850A2
WO2010131850A2 PCT/KR2010/002607 KR2010002607W WO2010131850A2 WO 2010131850 A2 WO2010131850 A2 WO 2010131850A2 KR 2010002607 W KR2010002607 W KR 2010002607W WO 2010131850 A2 WO2010131850 A2 WO 2010131850A2
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WIPO (PCT)
Prior art keywords
data
base station
mac
harq
entity
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English (en)
Korean (ko)
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WO2010131850A3 (fr
Inventor
박성준
이승준
천성덕
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LG Electronics Inc
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LG Electronics Inc
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Priority claimed from KR1020100036430A external-priority patent/KR101669966B1/ko
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Priority to US13/320,018 priority Critical patent/US8605674B2/en
Publication of WO2010131850A2 publication Critical patent/WO2010131850A2/fr
Publication of WO2010131850A3 publication Critical patent/WO2010131850A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/189—Transmission or retransmission of more than one copy of a message
    • 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
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]

Definitions

  • the following description relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving redundant data in a wireless communication system supporting multiple carriers.
  • uplink bandwidth and downlink bandwidth are generally symmetrical to each other.
  • ITU International Telecommunication Union
  • carrier aggregation Bandwidth Aggregation
  • Spectrum Aggregation for efficient use of fragmented small bands to achieve the same effect as combining multiple bands physically in the frequency domain and using bands of logically large bands.
  • Carrier aggregation is introduced to support increased throughput, to prevent cost increases due to the introduction of wideband RF devices, and to ensure compatibility with existing systems.
  • Carrier aggregation refers to data between a terminal and a base station through a plurality of bundles of carriers in a bandwidth unit defined in a conventional wireless communication system (LTE system in case of LTE-A system, or IEEE 802.16e system in case of IEEE 802.16m system). It is a technology that can be exchanged.
  • the carrier of the bandwidth unit defined in the existing wireless communication system may be referred to as a component carrier (CC).
  • the carrier aggregation technology may include a technology that supports a system bandwidth of up to 100 MHz by binding up to 5 component carriers even though one component carrier supports a bandwidth of 5 MHz, 10 MHz, or 20 MHz.
  • an automatic repeat and request (ARQ) scheme using error-detection information may be used as a method for controlling an error in uplink / downlink transmission.
  • ARQ automatic repeat and request
  • a hybrid ARQ (HARQ) scheme that combines and decodes original transmitted information and retransmitted information to reduce the number of retransmissions due to an error may be used.
  • HARQ hybrid ARQ
  • the base station receiving the uplink data on the data channel (PDSCH) from the terminal transmits an acknowledgment / negative acknowledgment (ACK / NACK) signal for the uplink data on the control channel (PHICH) after a predetermined time has elapsed .
  • the base station receiving the uplink data may transmit a control channel (PHICH) after 4 TTI (Transmission Time Interval), but is not limited thereto.
  • the ACK / NACK signal becomes an ACK signal when the uplink data is successfully decoded, and becomes an NACK signal when the decoding of the uplink data fails.
  • the terminal retransmits retransmission data for uplink data to the base station. Retransmission may be achieved by receiving an ACK signal or up to a maximum number of retransmissions. If the ACK / NACK signal for the retransmission data is determined to be an ACK signal, the terminal may transmit new uplink data to the base station.
  • the transmission time or resource allocation of the ACK / NACK signal for uplink / downlink data may be dynamically informed by the base station through signaling, or may be previously determined according to the transmission time or resource allocation of uplink / downlink data. have.
  • a TTI of 1 ms is used, and accordingly, a round trip time (RTT) of HARQ operation can be reduced to 8 ms.
  • RTT round trip time
  • the terminal since the terminal is located at the edge of the cell and the terminal lacks power, sufficient energy for data transmission cannot be used for a short TTI, so the probability of successful data transmission can be lowered.
  • the data transmitted from the terminal to the base station is important data such as the quality measurement result value of the neighbor cell required to perform the handover, the call may be disconnected due to the data transmission failure.
  • An object of the present invention is to increase the probability of success in transmitting and receiving data in a system supporting a carrier aggregation technique using a plurality of component carriers.
  • a transmitter supporting carrier aggregation performing communication using N component carriers (N ⁇ 2) duplicates data.
  • the method of transmitting the data may include generating N redundant data using RLC Protocol Data Units (PDUs) from a Radio Link Control (RLC) layer in a media access control (MAC) layer of the transmitter; Transmitting each of the data to the receiver simultaneously on the N component carriers through each of the N HARQ entities (Hybrid Automatic Repeat and reQuest Entity).
  • PDUs RLC Protocol Data Units
  • RLC Radio Link Control
  • MAC media access control
  • the transmitting may include each of the N HARQ entities using independent or different redundancy version (RV) values for the N redundant data.
  • RV redundancy version
  • the generating of the duplicated data may include generating one MAC PDU by multiplexing the RLC PDUs, and repeatedly generating N MAC PDUs identical to the one MAC PDU. can do.
  • the RLC PDUs include RLC PDUs marked as data to be transmitted redundantly
  • generating the duplicate data may include generating N MAC PDUs each including at least the marked RLC PDUs while multiplexing the RLC PDUs. It may include the step.
  • the method may further include setting such that retransmission is not performed for the remaining redundant data.
  • ACK acknowledgment
  • the transmitter may be a terminal and the receiver is a base station, and may further include receiving control information for redundant data transmission from the base station through one or more of the N component carriers.
  • control information may include an uplink grant for transmitting duplicate data, and the uplink grant may be masked with an identifier of a terminal or an identifier for transmitting duplicate data.
  • a receiver supporting carrier aggregation performing communication using N component carriers (N ⁇ 2) duplicates data.
  • Receiving method receiving N duplicate data on the N component carriers from each transmitter through each of the N HARQ (Hybrid Automatic Repeat and reQuest Entity), combining the N duplicate data to perform decoding And transmitting HARQ feedback based on the decoding result to the transmitter through one or more of the N HARQ entities.
  • N HARQ Hybrid Automatic Repeat and reQuest Entity
  • the transmitter may be a base station and the receiver is a terminal, and further comprising the step of receiving control information for receiving duplicate data from the base station through one or more of the N component carriers.
  • control information may include a downlink assignment for receiving duplicate data, and the downlink assignment may be masked by an identifier of a terminal or an identifier for transmitting duplicate data.
  • the terminal apparatus performing the transmission multiplexes an RLC layer module for generating data to be transmitted as a Radio Link Control Protocol Data Unit (RLC PDU) and delivering the same to a Media Access Control (MAC) layer, and an RLC PDU delivered from the RLC layer module.
  • RLC PDU Radio Link Control Protocol Data Unit
  • MAC Media Access Control
  • a MAC layer module including corresponding N HARQ entities (Hybrid Automatic Repeat and request Entity) and a transport channel received from each of the N HARQ entities are used for uplink physical
  • a physical layer module configured to map a channel to a base station and receive a downlink control channel from the base station, wherein the MAC layer module receives the control information for redundant data transmission from the base station, Generate N redundant data using the RLC PDUs through a duplicate entity, and transmit each of the N duplicate data to the physical layer module through each of the N HARQ entities, wherein the physical layer module is
  • the transmission channel received from each of the N HARQ entities may be configured to be mapped to an uplink physical channel and simultaneously transmitted to the base station.
  • N component carriers N ⁇ 2
  • the terminal device performing the reception combines and decodes N HARQ entities (Hybrid Automatic Repeat and request Entity) corresponding to each of the N component carriers and MAC PDUs transmitted from the N HARQ entities (Duplication Entity).
  • a MAC (Media Access Control) layer module including a de-multiplexing entity for demultiplexing MAC PDUs transmitted from the duplicate entity, and a downlink physical channel received on the N component carriers.
  • MAC Media Access Control
  • the MAC layer module When the MAC layer module receives control information for receiving duplicate data from the base station, the MAC layer module transmits N duplicate data on the N component carriers to the duplicate entity through each of the N HARQ entities, and transmits the duplicate entity. Decoupling is performed by combining the N pieces of redundant data and transmitting HARQ feedback according to the decoding result to the base station through one or more of the N HARQ entities.
  • the present invention it is possible to increase the probability of success in transmitting and receiving data in a system supporting a carrier aggregation technique using a plurality of component carriers. In addition, it is possible to selectively increase the probability of transmission and reception of important data.
  • 1 is a diagram showing the structure of a wireless communication system.
  • FIG. 2 is a diagram illustrating a control plane of a wireless protocol.
  • 3 is a diagram illustrating a user plane of a wireless protocol.
  • FIG. 4 is a diagram illustrating carrier aggregation.
  • 5 is a diagram illustrating a structure of a downlink L2 (second layer) in carrier aggregation.
  • FIG. 6 is a diagram illustrating a structure of an uplink L2 (second layer) in carrier aggregation.
  • FIG. 7 is a diagram illustrating a method of operating uplink HARQ.
  • FIG. 8 is a diagram illustrating a method for operating downlink HARQ.
  • FIG. 9 is a diagram showing the structure of a transmitting side L2 (second layer) according to an embodiment of the present invention.
  • FIG. 10 is a diagram showing the structure of a transmitting side L2 (second layer) according to another embodiment of the present invention.
  • FIG. 11 is a diagram illustrating a structure of a receiving side L2 (second layer) according to an embodiment of the present invention.
  • FIG. 12 is a diagram showing the structure of a transmitting side L2 (second layer) according to another embodiment of the present invention.
  • FIG. 13 is a view showing the configuration of a preferred embodiment of a wireless communication system including a terminal apparatus and a base station apparatus according to the present invention.
  • each component or feature may be considered to be optional unless otherwise stated.
  • Each component or feature may be embodied in a form that is not combined with other components or features.
  • some components and / or features may be combined to form an embodiment of the present invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment.
  • the base station has a meaning as a terminal node of the network that directly communicates with the terminal.
  • the specific operation described as performed by the base station in this document may be performed by an upper node of the base station in some cases.
  • a 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point (AP), and the like.
  • the repeater may be replaced by terms such as relay node (RN) and relay station (RS).
  • the term “terminal” may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and the like.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and LTE-Advanced (LTE-A) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) long term evolution (LTE) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A Advanced
  • WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system). For clarity, the following description focuses on 3GPP LTE and LTE-A systems, but the technical spirit of the present invention is not limited thereto.
  • the LTE system is a mobile communication system evolved from the UMTS system.
  • the LTE system structure can be broadly classified into an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and an Evolved Packet Core (EPC).
  • E-UTRAN is composed of a UE (User Equipment, UE) and an eNB (Evolved NodeB, eNB), and is called a Uu interface between the UE and the eNB, and an X2 interface between the eNB and the eNB.
  • UE User Equipment
  • eNB evolved NodeB
  • the EPC consists of a Mobility Management Entity (MME) that handles the control plane and a Serving Gateway (S-GW) that handles the user plane.
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • the S1-MME interface is used between the eNB and the MME.
  • the eNB and the S-GW are called S1-U interfaces, and they are collectively called S1 interfaces.
  • the radio interface protocol (Radio Interface Protocol) is defined in the Uu interface, which is a radio section, and consists of a physical layer, a data link layer, and a network layer horizontally. Is divided into a user plane for user data transmission and a control plane for signaling (control signal) transmission.
  • This air interface protocol is based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems.
  • OSI Open System Interconnection
  • FIGS. 2 and 3 Description of each radio protocol layer shown in FIGS. 2 and 3 is as follows. 2 is a diagram illustrating a control plane of a radio protocol, and FIG. 3 is a diagram illustrating a user plane of a radio protocol.
  • a physical layer (PHY) layer which is a first layer, provides an information transfer service to a higher layer by using a physical channel.
  • the PHY layer is connected to the upper Medium Access Control (MAC) layer through a transport channel, and data between the MAC layer and the PHY layer moves through this transport channel.
  • the transport channel is largely divided into a dedicated transport channel and a common transport channel according to whether the channel is shared. Then, data is transferred between different PHY layers, that is, between PHY layers of a transmitting side and a receiving side through a physical channel using radio resources.
  • the Media Access Control (MAC) layer is responsible for mapping various logical channels to various transport channels, and also for logical channel multiplexing to map multiple logical channels to one transport channel. Play a role.
  • the MAC layer is connected to a Radio Link Control (RLC) layer, which is a higher layer, by a logical channel, and the logical channel is a control channel that transmits information on the control plane according to the type of information to be transmitted. It is divided into (Control Channel) and Traffic Channel that transmits user plane information.
  • RLC Radio Link Control
  • the RLC layer of the second layer performs segmentation and concatenation of data received from the upper layer to adjust the data size so that the lower layer is suitable for transmitting data in a wireless section.
  • the AM RLC performs a retransmission function through an Automatic Repeat and Request (ARQ) function for reliable data transmission.
  • ARQ Automatic Repeat and Request
  • the Packet Data Convergence Protocol (PDCP) layer of the second layer is an IP containing relatively large and unnecessary control information for efficient transmission in a low bandwidth wireless section when transmitting IP packets such as IPv4 or IPv6. Performs Header Compression which reduces the packet header size. This transmits only the necessary information in the header portion of the data, thereby increasing the transmission efficiency of the wireless section.
  • the PDCP layer also performs a security function, which is composed of encryption (Ciphering) to prevent third-party data interception and integrity protection (Integrity protection) to prevent third-party data manipulation.
  • the radio resource control (RRC) layer located at the top of the third layer is defined only in the control plane, and the configuration, re-configuration, and release of radio bearers (RBs) are performed. It is responsible for controlling logical channels, transport channels and physical channels.
  • the radio bearer (RB) refers to a logical path provided by the first and second layers of the radio protocol for data transmission between the terminal and the UTRAN, and in general, the establishment of the RB means a radio protocol required to provide a specific service.
  • RB is divided into SRB (Signaling RB) and DRB (Data RB). SRB is used as a channel for transmitting RRC messages in the control plane, and DRB is used as a channel for transmitting user data in the user plane.
  • a carrier aggregation technique for supporting multiple carriers will be described with reference to FIG. 4.
  • CC component carriers
  • a bandwidth unit for example, 20 MHz
  • a conventional wireless communication system for example, LTE system
  • the bandwidth sizes of component carriers used for carrier aggregation may be the same or different.
  • Each component carrier also has a different frequency band (or center frequency).
  • each component carrier may exist on a continuous frequency band, component carriers existing on a discontinuous frequency band may be used for carrier aggregation.
  • bandwidth sizes of uplink and downlink may be symmetrically allocated or asymmetrically allocated.
  • a plurality of carriers (component carriers) used for carrier aggregation may be classified into a primary component carrier (PCC) and a secondary component carrier (SCC).
  • the primary component carrier refers to a carrier used by a base station to exchange traffic and control signaling with a terminal.
  • the control signaling may include addition of a component carrier, configuration of a primary component carrier, configuration of a discontinuous reception (DRX), an UL grant or a DL assignment.
  • DRX discontinuous reception
  • a terminal belonging to the base station may be configured to have only one main component carrier. If the terminal operates in a single carrier mode, the main component carrier is used. Therefore, the main component carrier should be set to satisfy all the requirements for the exchange of data and control signaling between the base station and the terminal so that they can be used independently.
  • the secondary component carrier refers to an additional component carrier that can be activated or deactivated according to the amount of data transmitted and received.
  • the secondary component carrier may be set to be used only according to specific commands and rules received from the base station.
  • the secondary component carrier may be set to be used with the primary component carrier to support additional bandwidth.
  • a control signal such as an uplink grant or downlink allocation may be received from the base station to the terminal through the activated secondary component carrier, and the channel quality indicator (CQI) and the precoding matrix indicator (Precoding Matrix) from the terminal to the base station.
  • a control signal through an uplink such as an Index (PMI), a Rank Indicator (RI), and a Sounding Reference Signal (SRS) may be transmitted.
  • PMI Index
  • RI Rank Indicator
  • SRS Sounding Reference Signal
  • Resource allocation to the terminal may have a range of a primary component carrier and a plurality of secondary component carriers.
  • the system may assign a secondary carrier to the UE asymmetrically for downlink and / or uplink based on system load (ie static / dynamic load balancing), peak data rate, or quality of service requirements. have.
  • configuration of a component carrier is provided to a user equipment from a base station after an RRC connection procedure.
  • RRC connection means that the terminal is allocated radio resources based on the RRC signaling exchanged between the RRC layer of the terminal and the network through the SRB.
  • the terminal may be provided with configuration information on the primary component and the secondary component carrier from the base station.
  • the configuration information on the secondary carrier may include addition / deletion (or activation / deactivation) of the secondary carrier. Therefore, in order to activate the secondary component carrier or deactivate the existing secondary component carrier between the base station and the terminal it is necessary to perform the exchange of RRC signaling and MAC Control Element (MAC Control Element).
  • MAC Control Element MAC Control Element
  • the activation or deactivation of the secondary component carrier may be determined by the base station based on quality of service (QoS), the load condition of the carrier and other factors.
  • the base station may instruct the UE to configure the secondary component carrier using a control message including information such as an indication type (activation / deactivation) for the downlink / uplink and a secondary component carrier list.
  • FIGS. 5 and 6 A structure of L2 (second layer) in consideration of carrier aggregation technology will be described with reference to FIGS. 5 and 6.
  • 5 is a diagram illustrating a structure of downlink L2 (second layer) in carrier aggregation
  • FIG. 6 is a diagram illustrating a structure of uplink L2 (second layer) in carrier aggregation.
  • the PDCP 510, RLC 520, and MAC 530 layers are shown.
  • the elements 505, 515, 525, 535 circled in the interface between each layer in FIG. 5 represent Service Access Points (SAP) for peer-to-peer communication.
  • SAP Service Access Points
  • the SAP between the PHY channel (not shown) and the MAC layer provides a transport channel (535), and the SAP between the MAC layer and the RLC layer provides a logical channel (525).
  • the general operation of each layer is as described above.
  • multiple logical channels ie, radio bearers
  • the multiplexing entities 531 of the MAC layer are related to the application of Multiple Input Multiple Output (MIMO) technology.
  • MIMO Multiple Input Multiple Output
  • one transport channel is generated by multiplexing a plurality of logical channels in the case of non-MIMO, so that one HARQ entity (Hybrid Automatic Repeat) is used in one multiplexing entity 531. and Request Entity) is provided (not shown).
  • a plurality of transport channels corresponding to a plurality of component carriers are generated from one multiplexing entity 531.
  • one HARQ entity 532 manages one component carrier.
  • the MAC layer 530 of the system supporting the carrier aggregation technique may include a plurality of multiplexing entities 531 in one multiplexing entity.
  • HARQ entity 532 is provided and performs operations related thereto.
  • each HARQ entity 532 independently processes a transport block, a plurality of transport blocks may be simultaneously transmitted and received through a plurality of component carriers.
  • the same operation as the downlink L2 structure 500 of FIG. 5 is performed except that one multiplexing entity 630 is included in one MAC layer 630. do. That is, a plurality of HARQ entities 632 are provided for a plurality of component carriers, operations related to the plurality of HARQ entities 632 are performed in the MAC layer 630, and a plurality of transport blocks are provided through the plurality of component carriers. Transmit and receive at the same time.
  • the base station may transmit uplink grant information or uplink scheduling information (UL scheduling information) to the terminal through the physical downlink control channel (PDCCH) so that the terminal (UE) can transmit data to the base station (eNB) in the HARQ scheme.
  • UL scheduling information includes a terminal identifier (C-RNTI or Semi-Persistent Scheduling C-RNTI), information of a radio resource to be allocated to a terminal indicated by the terminal identifier (Resource block assignment), transmission parameters (Modulation, Coding scheme, and redundancy). version), NDI (New Data Indicator) and the like.
  • a HARQ entity that manages HARQ operation exists in the MAC layer of the terminal, and the HARQ entity manages a plurality of HARQ processes (for example, eight).
  • the plurality of HARQ processes operate synchronously with time. That is, each HARQ process is synchronously allocated to every TTI. HARQ process # 1 in TTI 1, HARQ process # 2 in TTI 2, HARQ process # 8 in TTI 8, HARQ process # 1 in TTI 9, and HARQ process # 2 in TTI 10. As a result, specific HARQ processes may be sequentially allocated according to data reception time points. In addition, each of the plurality of HARQ processes has an independent HARQ buffer.
  • the HARQ process may transmit the data by the HARQ process associated with the received time point (TTI).
  • TTI time point
  • the HARQ process may transmit data in the N + 4th TTI.
  • HARQ process K number allocated in N + 4th TTI is used for the data transmission.
  • the terminal generates data in a MAC Protocol Data Unit (MAC PDU) format according to UL scheduling information, stores the data in a HARQ buffer, and transmits the MAC PDU to the base station at the time of transmission. And waits for HARQ feedback from the base station for the MAC PDU transmission.
  • MAC PDU MAC Protocol Data Unit
  • FIG. 7 illustrates an example in which the base station fails to decode data and transmits a NACK signal through a physical HARQ indicator channel (PHICH) (step S703).
  • PHICH physical HARQ indicator channel
  • the terminal may retransmit the same MAC PDU stored in the HARQ buffer at a time point specified in the same format or a new format (S704). That is, if HARQ NACK is received in the Nth TTI, the MAC PDU stored in the HARQ buffer of the corresponding HARQ process is retransmitted in the N + 4th TTI.
  • the terminal receives the ACK signal from the base station, it detects that data transmission to the base station is successful and transmits the next data, the terminal stops HARQ retransmission for the data.
  • HARQ retransmission of the terminal may operate in a non-adaptive manner. That is, the first transmission of specific data is possible only by receiving a PDCCH including UL scheduling information, but retransmission is possible even without receiving a PDCCH.
  • the HARQ retransmission of the non-adaptive scheme retransmits the data using the same UL scheduling information as the first transmission in the TTI to which the corresponding HARQ process is next assigned without receiving the PDCCH.
  • HARQ retransmission of the terminal may operate in an adaptive (Adaptive) manner.
  • a transmission parameter for retransmission is received through the PDCCH.
  • the UL scheduling information included in the PDCCH may be different from the initial transmission according to channel conditions. For example, if the channel condition is better than the initial transmission, the transmission may be instructed at a high bit rate. On the contrary, if the channel condition is bad, the transmission may be instructed at a lower bit rate than the initial transmission. .
  • the UE determines whether the data to be transmitted at this time is initial transmission data or whether the previous data should be retransmitted by looking at the New Data Indicator (NDI) field in the PDCCH.
  • NDI New Data Indicator
  • the NDI field is a 1-bit field and toggles from 0 ⁇ 1 ⁇ 0 ⁇ 1 ⁇ 0 ... whenever new data is transmitted, and has the same value as the initial transmission for retransmission. That is, the UE can know whether the data is retransmitted by comparing whether the NDI field is equal to the previously transmitted value.
  • the UE increases the number of transmissions (CURRENT_TX_NB) by one for each data transmission by HARQ method, and discards the MAC PDU in the HARQ buffer when the CURRENT_TX_NB reaches the maximum number of transmissions set by the higher layer.
  • the base station when the base station receives the retransmitted data, it attempts to decode again by combining with the data stored in the soft buffer in various ways while failing to decode previously, and if the decoding succeeds, the ACK signal, and if it fails NACK Send a signal to the terminal.
  • the base station repeats the process of sending a NACK signal and receiving retransmission until successful decoding of data.
  • the base station attempts to decode the data retransmitted in step S704 through combining with previously received and stored data. If the base station succeeds in decoding the received data, the base station transmits an ACK signal to the terminal through the PHICH (step S705).
  • the base station may transmit the UL scheduling information for the next data transmission to the terminal through the PDCCH, and toggles NDI to 1 to inform that the UL scheduling information is used for new data transmission, not used for adaptive retransmission. It can ring and transmit (step S706). Accordingly, the terminal may transmit new data to the base station through the PUSCH corresponding to the received UL scheduling information (step S707).
  • the base station transmits downlink scheduling information (DL scheduling information) through the PDCCH in order to transmit data to the terminal in the HARQ method (S801).
  • the DL scheduling information includes a terminal identifier or an identifier (UE ID or Group ID) of a terminal group, a resource assignment of an allocated radio resource, a duration of assignment of an allocated radio resource, a transmission parameter, eg For example, a modulation scheme, a payload size, MIMO related information), HARQ process information, a redundancy version (RV), and a new data indicator (NDI) may be included.
  • the DL scheduling information is also transmitted through the PDCCH control channel for retransmission, and the corresponding information may be changed according to channel conditions. For example, if the channel condition is better than the initial transmission, the modulation or payload size can be changed to transmit at a high bit rate. In contrast, if the channel situation is not good, the channel condition is lower than the initial transmission. Can transmit
  • the UE monitors every TTI and PDCCH control channel and checks DL scheduling information coming to it, and if there is information of itself, receives data from the base station through the PDSCH at the time associated with the PDCCH (S802).
  • the terminal When the terminal receives the data, it stores it in a soft buffer and attempts to decode the data (S803).
  • the terminal transmits HARQ feedback to the base station according to the decoding result. That is, the terminal transmits an ACK signal when the decoding succeeds and a NACK signal to the base station when it fails (S804).
  • the base station When the base station receives the ACK signal, the base station detects that data transmission to the terminal is successful and transmits the next data.
  • the base station receives the NACK signal, the base station detects that the data transmission has failed and retransmits the same data in the same format or a new format at an appropriate time (S805).
  • the terminal transmitting the NACK signal attempts to receive the retransmitted data.
  • the UE may determine whether the data transmitted this time is initial transmission data or retransmission of previous data by looking at the New Data Indicator (NDI) field in the PDCCH.
  • NDI New Data Indicator
  • the NDI field is a 1-bit field and toggles from 0 to 1 to 0 to 1 to 0 every time new data is transmitted, and has the same value as the initial transmission for retransmission. That is, the UE can know whether the data is retransmitted by comparing whether the NDI field is equal to the previously transmitted value.
  • the terminal When the terminal receives the retransmitted data, it attempts to decode again by combining it with the data stored in the soft buffer in various ways while failing to decode previously (S806), and if the decoding succeeds, the NACK signal fails.
  • the signal is transmitted to the base station (S807).
  • the terminal may repeat the process of transmitting the NACK signal and receiving the retransmission until successful decoding of the data.
  • the present invention proposes a method of increasing the probability of success of data transmission by repeatedly generating the same data at a transmitting side and transmitting the same data to the receiving side through a plurality of component carriers in a system supporting carrier aggregation using a plurality of component carriers.
  • a duplicate entity 932 is defined in the MAC layer 930 of the transmitting side, and the duplicate object includes a plurality of MAC PDUs transmitted from the multiplexed entity 931 of the MAC layer 930.
  • a duplicate MAC PDU may be generated and transmitted to HARQ entities 933-1, 933-2, ..., 933-N corresponding to each of the N component carriers (in FIG. 9, the value of N is 5). Illustratively).
  • each HARQ entity 933-1,..., 933 -N may simultaneously transmit the MAC PDU to a receiver by using an independent redundancy version (RV) value.
  • RV redundancy version
  • the terminal may receive an uplink grant for duplication transmission from the base station.
  • the uplink grant for the redundant transmission may be received by the terminal through a specific downlink component carrier (or a specific cell) designated by the base station, or may be received through all downlink component carriers (or all cells).
  • a specific downlink component carrier or a specific cell
  • duplicate generation is generated through all uplink component carriers (or all cells). Send the MAC PDU.
  • the uplink grant may be transmitted through a control channel masked by C-RNTI of the terminal.
  • the control channel is a PDCCH in an LTE or LTE-A system, and HS-SCCH (High Speed Shared Control) in a High Speed Downlink Packet Access (HSDPA) / HSUPA (High Speed Uplink Packet Access) system supporting dual cells. Channel), Enhanced Dedicated Channel (E-DCH) Absolute Grant Channel (E-DCH), or E-RGCH (E-DCH Relative Grant Channel).
  • the base station may allocate a newly defined RNTI (eg, Duplication RNTI; D-RNTI) to the UE to indicate an uplink grant for redundant transmission.
  • the terminal may perform redundant transmission.
  • the multiplexing entity 931 of the MAC layer 930 of the terminal receives RLC PDUs and MAC Control Element (MAC CE) according to the uplink grant. It creates a MAC PDU 'A' consisting of, and delivers the MAC PDU 'A' to a duplicate entity (932).
  • MAC CE MAC Control Element
  • the duplicate entity 932 receives the MAC PDU 'A' and duplicates and generates the MAC PDU 'A' by the same number N of uplink component carriers constituting carrier aggregation.
  • the duplicated MAC PDUs 'A' are transmitted to N HARQ entities 933-1,..., 933 -N corresponding to each component carrier.
  • Each of the N HARQ entities 933-1, ..., 933-N independently sets the RV values for the corresponding MAC PDUs and simultaneously transmits them to the base station.
  • Frequency division multiplexing (FDM) may be used to simultaneously transmit data on each component carrier.
  • the transmission power is low, for example, because the transmitter is located at the edge of the cell, by transmitting redundant data on a plurality of component carriers, the same data repeatedly generated at the receiving side is successfully transmitted and / or The reception probability can be increased.
  • cell coverage may be increased as compared with the case of not using redundant data on a plurality of component carriers.
  • the terminal may stop the transmission of the MAC PDUs. For example, if duplicate MAC PDUs are transmitted in three HARQ entities, and only one HARQ entity receives the HARQ ACK for the MAC PDU, the other two HARQ entities receive the HARQ NACK. May no longer perform retransmission of the data in HARQ entities receiving the HARQ NACK.
  • FIG. 10 illustrates an uplink L2 structure including a PDCP layer 1010, an RLC layer 1020, and a MAC layer 1030.
  • a duplicate object 1032 is defined in the MAC layer 1030 on the transmitting side, and the duplicate object is composed of N pieces by making one MAC PDU delivered from the multiplexed entity 1031 into a plurality of duplicate MAC PDUs.
  • the information is transmitted to HARQ entities 1033-1,..., 1033-N corresponding to each of the carriers (FIG. 10 exemplarily illustrates a case where N has a value of 5).
  • Each HARQ entities 1033-1,..., 1033-N may simultaneously transmit MAC PDUs to a receiver by using different RV values.
  • the terminal receives an uplink grant for redundant transmission from the base station.
  • the uplink grant for redundant transmission may be received by the terminal through a specific downlink component carrier (or a specific cell) designated by the base station, or may be received through all downlink component carriers (or all cells).
  • a specific downlink component carrier or a specific cell
  • the uplink grant is transmitted through all uplink component carriers (or all cells). Duplicate MAC PDUs will be sent simultaneously.
  • the uplink grant may be transmitted to the PDCCH (or HS-SCCH, E-AGCH, E-RGCH) masked by the C-RNTI of the terminal.
  • the base station may allocate a newly defined RNTI (eg, Duplication RNTI; D-RNTI) to the UE to indicate an uplink grant for redundant transmission.
  • RNTI eg, Duplication RNTI; D-RNTI
  • the terminal may perform redundant transmission.
  • the multiplexing entity 1031 of the MAC layer 1030 of the UE is a MAC PDU composed of RLC PDUs and MAC control elements (MAC CE) according to the uplink grant.
  • MAC CE MAC control elements
  • the duplicate entity 1032 receives the MAC PDU 'A' and duplicates and generates the MAC PDU 'A' equally as many as the number N of uplink component carriers constituting carrier aggregation.
  • the duplicated MAC PDUs 'A' are transmitted to N HARQ entities 1033-1,..., 1033-N corresponding to each component carrier.
  • a redundancy version (RV) value is set according to a predetermined rule for each MAC PDU. It can be set and indicated to each HARQ entity (1033-1, ..., 1033-N). That is, different RV values may be set for each duplicated MAC PDU.
  • the duplicate entity 1032 transmits the RH value 0 to the first HARQ entity 1033-1, and transmits it to the second HARQ entity 1033-2. Can be passed by setting 1 as the RV value.
  • the third HARQ entity 1033-3 and the fourth HARQ entity 1033-4 may transmit the RV values by setting 2 and 3, respectively.
  • the UE may inform the UE of the RV value setting method through the PDCCH or the MAC control element.
  • the RV value is not set in the duplicate object 1032 and transmitted to each HARQ entity 1033-1,..., 1033-N.
  • the RV value used in the duplicate transmission is a HARQ entity 1033-1, ..., 1033-N) may be fixed. That is, the base station may set the RV value that the HARQ entity should use when duplicate transmission through the RRC message, MAC message or PDCCH, HARQ entity of the terminal, if duplicate transmission is required, using only the above RV value MAC PDU Can transmit
  • the RV value to be used may be calculated and used through the transmission time of the MAC PDU duplicated with the identifier of the HARQ entity. For example, assume that four HARQ entities are used for four uplink component carriers, and the identifiers of the four HARQ entities are referred to as 1, 2, 3, and 4, respectively. If the time when the duplicated MAC PDU is transmitted is the 101 th TTI, a result value of an expression (an identifier of a 100 modulo HARQ entity) is used. As a result, if the value is 1, HARQ entity 1 sets RV to 1, HARQ entity 2 sets RV to 2, HARQ entity 3 sets RV to 3, and finally HARQ entity 4 The RV value may be set to 0 to transmit each MAC PDU.
  • HARQ entities simultaneously transmit the MAC PDU to the base station according to the uplink grant with the RV value defined above.
  • the second embodiment similarly to the first embodiment, by using redundant data on a plurality of component carriers, cell coverage can be increased and data transmission / reception probability can be increased.
  • the terminal may stop the transmission of the MAC PDUs. For example, if duplicate MAC PDUs are transmitted in three HARQ entities, and only one HARQ entity receives the HARQ ACK for the MAC PDU, the other two HARQ entities receive the HARQ NACK. May no longer perform retransmission of the data in HARQ entities receiving the HARQ NACK.
  • the duplicated object 1132 is defined in the MAC layer 1130 of the receiving side, so that the receiving side receives the duplicated data from the transmitting side.
  • the terminal receives a downlink assignment for duplication reception from the base station.
  • the downlink allocation for the redundant reception may be received by the terminal through a specific downlink component carrier designated by the base station, or may be received through all downlink component carriers.
  • the duplicate MAC PDU is received through all downlink component carriers.
  • Downlink allocation may be transmitted on the PDCCH masked by the C-RNTI of the terminal.
  • the base station may allocate a newly defined RNTI (eg, Duplication RNTI: D-RNTI) to the UE to indicate downlink allocation for redundant transmission.
  • D-RNTI Duplication RNTI
  • the terminal may perform duplicate reception.
  • the terminal receives the downlink allocation and duplicate reception is required, the terminal receives a transport block (TB) or MAC PDU received from each of the N HARQ entities 1133-1, ..., 1113-N. It may be passed to the duplicate entity 1132 (in FIG. 11, a case in which the value of N is 5 is illustrated as an example).
  • TB transport block
  • MAC PDU MAC PDU received from each of the N HARQ entities 1133-1, ..., 1113-N. It may be passed to the duplicate entity 1132 (in FIG. 11, a case in which the value of N is 5 is illustrated as an example).
  • the duplicate entity 1132 attempts to combine transport blocks received from each HARQ entity 1133-1,..., 1113 -N using a soft buffer. By combining the same data duplicated on the receiving side as described above, even when the transmitting power of the transmitting side is low, the probability of successful reception of the data can be increased. In addition, cell coverage may be increased as compared with the case of not using redundant data on a plurality of component carriers.
  • the RV values of the transport blocks received from each HARQ entity 1133-1, ..., 1113-N may be derived by the terminal according to various RV value setting methods described in the uplink HARQ of the second embodiment.
  • the terminal transfers the transport block to a demultiplexing entity 1131.
  • the duplicate entity 1132 requests the HARQ entity 1133-1,..., 1113 -N to transmit a HARQ ACK to the base station with HARQ feedback.
  • the duplicate entity 1132 requests the HARQ entity 1133-1,..., 1113 -N to transmit a HARQ NACK.
  • HARQ feedback 1133-1, ..., 1133-N transmits HARQ feedback to the base station, and all HARQ entities 1133-1, ... 1133-N send HARQ feedback to the base station.
  • the base station may set a specific HARQ entity so that only the configured HARQ entity transmits the HARQ feedback to the base station when the transmission of the HARQ feedback is required.
  • the transmitting side marks an important RLC PDU at the RLC layer 1220 and delivers it to the MAC layer 1230, and the MAC layer 1230 uses the marked RLC PDUs in duplicate to transmit MAC PDUs. It can be made and transmitted to the receiver by using each component carrier.
  • the multiplexing entity 1231 of the MAC layer 1230 of the terminal requests the RLC PDUs from the RLC layer 1220.
  • the RLC layer 1220 delivers the RLC PDUs 1221-1, 1221-2,..., 1221 -K to the multiplexing entity 1231 of the MAC layer 1230 according to the request, the RLC layer 1220 overlaps important data. Marking is required to request the transmission (FIG. 12 exemplarily shows the case where the value of K is 6).
  • Important data are, for example, RLC PDUs of Signaling RBs (SRBs), RLC PDUs containing Initialization & Refresh (IR) packets of Robust Header Compression (ROHC), RLC PDUs containing PDCP control PDUs, RLC control PDU, RLC retransmitted PDU, and the like.
  • the RLC layer 1220 may mark and transmit these important data to the MAC layer 1230 according to an indication of a higher layer (PDCP layer).
  • the multiplexing entity 1231 of the MAC layer 1230 of the UE configures a MAC PDU for each uplink component carrier
  • all RLC PDUs marked for redundant transmission are included in the MAC PDU to be configured for each uplink component carrier. Include it.
  • the MAC layer 1230 requests RLC PDUs from the RLC layer 1220, the RLC layer 1220 is RLC PDU1 (50), RLC PDU2 (50), RLC PDU3 (50) ), The RLC PDU4 50, the RLC PDU5 50, and the RLC PDU6 50 are delivered to the MAC layer 1230. And, it is assumed that RLC PDU1 is marked for redundant transmission as important data.
  • the multiplexing entity 1231 According to the RLC PDUs and the marking information, the multiplexing entity 1231 generates MAC PDUs 1232-1, ..., 1232-N for HARQ entities 1233-1, ..., 1233-N, respectively. (In FIG. 12, the case where N has a value of 5 is illustrated.)
  • a MAC PDU 1232-1 composed of RLC PDU1 and RLC PDU2 is generated and delivered to the first HARQ entity 1233-1, and the RLC PDU1 and RLC PDU3 configured to the second HARQ entity 1233-2.
  • the MAC PDU 1232-2 is generated and transmitted.
  • the third HARQ entity 1233-3 generates and delivers a MAC PDU 1232-3 composed of RLC PDU1 and RLC PDU4, and the fourth HARQ entity 1233-4 has a MAC composed of RLC PDU1 and RLC PDU5.
  • the PDU 1232-4 is generated and delivered, and the fifth HARQ entity 1233-5 generates and delivers a MAC PDU 1232-5 including an RLC PDU1 and an RLC PDU6.
  • Each HARQ entity 1233-1,..., 3123 -N transmits the MAC PDU received from the multiplexing entity to the base station.
  • the important data RLC PDU1 marked in the RLC layer 1220 may be repeatedly transmitted through a plurality of MAC PDUs. Therefore, even when data on one component carrier is lost, important data (RLC PDU1) is duplicated on another component carrier, thereby increasing the probability of successful transmission and reception of important data and a problem due to loss of important data. (Call disconnection, etc.) can be prevented.
  • Embodiments 1 to 4 described above may be applied to a carrier aggregation system that performs communication using a plurality of component carriers, and the carrier aggregation system may be, for example, an LTE-A system or a dual cell-HSDPA (Dual Cell-HSDPA). It may be a UMTS system supporting Dual Cell-HSUPA (Dual Cell-HSUPA).
  • the terminal is a transmitting side and the base station is an exemplary embodiment, but the present invention is not limited thereto. Includes the case.
  • the base station is a transmitting side and the terminal has been exemplarily described.
  • the present invention is not limited thereto. do.
  • the plurality of component carriers mean both an uplink component carrier and a downlink component carrier.
  • the cell has the same meaning as the component carrier in the carrier aggregation system.
  • the data repeatedly generated may be an RLC PDU or a MAC PDU.
  • the base station may be configured to transmit and receive duplicate data to the terminal through an RRC message.
  • information related to the transmission and reception of duplicate data may be included in system information (SI) so that all terminals in the cell may perform a process of transmitting and receiving duplicate data, and may be transmitted to all terminals in the cell.
  • SI system information
  • the base station may instruct the terminal to transmit and receive duplicate data through the PDCCH, HS-SCCH, or MAC control element.
  • the base station may activate or deactivate transmission and reception of duplicate data by using a specific code point of the PDCCH or HS-SCCH or by masking a specific RNTI and transmitting it to the terminal.
  • the base station may instruct the terminal to activate or deactivate the transmission and reception of duplicate data using the newly defined MAC control element.
  • the base station can be set so that the terminal can perform the transmission and reception of duplicate data only in case of important data. For example, when transmitting RLC PDUs of SRB, IR Packet of ROHC, PDCP / RLC control PDU, RLC retransmission PDU, etc., the base station may configure the terminal to perform redundant transmission.
  • a terminal device supports a carrier aggregation technology for performing communication using a plurality of component carriers, and the processor of the terminal may include a layer module corresponding to each layer shown in FIG. 6.
  • the terminal device performing redundant data transmission may include an RLC layer module, a MAC layer module, and a physical layer module.
  • the RLC layer module performs segmentation and concatenation of the data received from the upper layer to adjust the data size so that the lower layer is suitable for transmitting data in the radio section, and the data to be transmitted is RLC PDU. Can be generated and forwarded to the MAC layer.
  • the MAC layer module may play a role of logical channel multiplexing to map various logical channels to various transport channels and map multiple logical channels to one transport channel.
  • the MAC layer module multiplexes the RLC PDUs transmitted from the RLC layer module to generate a MAC PDU, and receives a MAC PDU generated from the multiplexing entity and duplicates the same MAC PDU.
  • An entity and a plurality of HARQ entities corresponding to each of the plurality of component carriers may be included.
  • the physical layer module may provide an information transmission service to a higher layer using a physical channel, and may transmit and receive data through a MAC channel module and a transport channel.
  • the physical layer module of the terminal device controls transmission and reception of control signals and data through a physical channel (control channel and / or data channel) using radio resources between the physical layer of the terminal device and the physical layer of the network (base station) side. can do.
  • the physical layer module may transmit a transmission channel received from a plurality of HARQ entities of the MAC layer to an uplink physical channel and transmit the same to a downlink physical channel, and transmit a downlink control channel (PDCCH) and / or a downlink data channel (PDSCH).
  • PDCH downlink control channel
  • PDSCH downlink data channel
  • the MAC layer module of the terminal device performing redundant data transmission receives control information on the duplicate data transmission from the base station
  • the plurality of duplicates are provided by using the RLC PDUs through the multiplexed entity and the duplicated entity. It may be configured to generate data and deliver each of the plurality of redundant data to the physical layer module through each of the plurality of HARQ entities.
  • the physical layer module may be configured to simultaneously map the transmission channel received from each of the plurality of HARQ entities to the uplink physical channel and transmit the same to the base station.
  • the MAC layer module combines a plurality of HARQ entities corresponding to each of a plurality of component carriers and MAC PDUs transmitted from a plurality of HARQ entities.
  • the physical layer module may deliver a downlink physical channel received on a plurality of component carriers to a plurality of HARQ entities through a transmission channel, respectively.
  • the MAC layer module receives duplicated data on a plurality of component carriers through each of the plurality of HARQ entities when receiving control information for receiving duplicated data from the base station. And perform decoding by combining a plurality of redundant data through a duplicate entity, and transmit HARQ feedback according to the decoding result to the base station through one or more of the plurality of HARQ entities.
  • FIG. 13 is a diagram showing the configuration of an embodiment of a wireless communication system including a terminal apparatus and a base station apparatus according to the present invention.
  • a UE device may include a receiving module 1311, a transmitting module 1312, a processor 1313, and a memory 1314, respectively.
  • the receiving module 1311 may receive various signals, data, information, and the like from the base station.
  • the transmission module 1312 may transmit various signals, data, information, and the like to the base station.
  • the processor 1313 In the terminal device for transmitting the redundant data, the processor 1313 generates a plurality of redundant data using the RLC PDUs from the RLC layer in the MAC layer, each of the plurality of redundant data through each of the plurality of HARQ entity It can be controlled to transmit to a base station on a plurality of component carriers at the same time.
  • the processor 1313 receives a plurality of duplicated data on the plurality of component carriers from the base station through each of the plurality of HARQ entities, and combines the plurality of duplicated data to perform decoding.
  • the HARQ feedback according to the decoding result may be transmitted to the base station through one or more of a plurality of HARQ entities.
  • the processor 1313 performs a function of processing the information received by the terminal device, information to be transmitted to the outside, and the like.
  • the memory 1314 may store the processed information for a predetermined time and may include a buffer (not shown). May be replaced by a component such as).
  • the base station (eNB) device may include a receiving module 1331, a transmitting module 1332, a processor 1333, and a memory 1334.
  • the receiving module 1331 may receive various signals, data, information, and the like from the terminal.
  • the transmission module 1332 may transmit various signals, data, information, and the like to the terminal.
  • the base station apparatus may provide control information for duplicate data transmission and reception to the terminal through an RRC message, system information (SI), PDCCH, HS-SCCH, MAC CE, and the like.
  • SI system information
  • PDCCH Physical Downlink Control Channel
  • HS-SCCH High Speed Downlink Control Channel
  • MAC CE MAC Control Channel
  • the processor 1333 In the base station apparatus for transmitting the redundant data, the processor 1333 generates a plurality of redundant data using the RLC PDUs from the RLC layer in the MAC layer, each of the plurality of redundant data through each of the plurality of HARQ entity A plurality of component carriers can be controlled to be simultaneously transmitted to the terminal.
  • the processor 1333 receives a plurality of redundant data on a plurality of component carriers from the terminal through each of the plurality of HARQ entities, and combines the plurality of redundant data to perform decoding.
  • the HARQ feedback according to the decoding result may be transmitted to the terminal through one or more of a plurality of HARQ entities.
  • the processor 1333 performs a function of processing the information received by the terminal device, information to be transmitted to the outside, and the like
  • the memory 1334 may store the processed information and the like for a predetermined time and include a buffer (not shown). May be replaced by a component such as).
  • Embodiments of the present invention described above may be implemented through various means.
  • embodiments of the present invention may be implemented by hardware, firmware, software, or a combination thereof.
  • a method according to embodiments of the present invention may include one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), and Programmable Logic Devices (PLDs). It may be implemented by field programmable gate arrays (FPGAs), processors, controllers, microcontrollers, microprocessors, and the like.
  • ASICs Application Specific Integrated Circuits
  • DSPs Digital Signal Processors
  • DSPDs Digital Signal Processing Devices
  • PLDs Programmable Logic Devices
  • FPGAs field programmable gate arrays
  • processors controllers, microcontrollers, microprocessors, and the like.
  • the method according to the embodiments of the present invention may be implemented in the form of a module, a procedure, or a function that performs the functions or operations described above.
  • the software code may be stored in a memory unit and driven by a processor.
  • the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
  • Embodiments of the present invention as described above may be applied to various mobile communication systems.

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Abstract

La présente invention concerne un système de communication sans fil et, en particulier, un procédé et un appareil d'émission et de réception de données doubles dans un système de communication sans fil multiporteuse. Selon un mode de réalisation de la présente invention, un procédé dans lequel un émetteur qui assure le regroupement de porteuses pour réaliser une communication à l'aide de N (N=2) porteuses composantes, émet des données doubles, comprend les étapes consistant à : générer, dans une couche commande d'accès au support (MAC) de l'émetteur, N données doubles utilisant des unités PDU - unités de données de protocole - RLC - commande de liaison radio - à partir d'une couche RLC; et simultanément envoyer, à un récepteur, les N données doubles respectives sur les N porteuses composantes par N entités hybrides à demande de répétition automatique (HARQ) respectives.
PCT/KR2010/002607 2009-05-11 2010-04-26 Procédé et appareil d'émission et de réception de données doubles dans un système de communication sans fil multiporteuse Ceased WO2010131850A2 (fr)

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WO2014042377A1 (fr) * 2012-09-17 2014-03-20 Lg Electronics Inc. Procédé d'exécution d'une retransmission vers un réseau dans un équipement d'utilisateur dans un système de communication sans fil et appareil pour ce procédé
CN104137457A (zh) * 2012-02-24 2014-11-05 华为技术有限公司 用于harq实体配置的系统和方法
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