WO2014163368A1 - Procédé permettant de transmettre et de recevoir un canal de commande en liaison descendante, et appareil destiné audit procédé - Google Patents

Procédé permettant de transmettre et de recevoir un canal de commande en liaison descendante, et appareil destiné audit procédé Download PDF

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Publication number
WO2014163368A1
WO2014163368A1 PCT/KR2014/002768 KR2014002768W WO2014163368A1 WO 2014163368 A1 WO2014163368 A1 WO 2014163368A1 KR 2014002768 W KR2014002768 W KR 2014002768W WO 2014163368 A1 WO2014163368 A1 WO 2014163368A1
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WIPO (PCT)
Prior art keywords
scheduling
indication information
downlink
subframe scheduling
dci format
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PCT/KR2014/002768
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English (en)
Korean (ko)
Inventor
노민석
최우진
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주식회사 케이티
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Priority claimed from KR1020130128220A external-priority patent/KR20140120249A/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2014163368A1 publication Critical patent/WO2014163368A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • 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 present invention relates to a method and apparatus for transmitting and receiving a downlink control channel, and more particularly, to a technique for transmitting and receiving a downlink control channel between a base station and a terminal for instructing scheduling of multiple subframes under a multilayer cell structure. to be.
  • LTE Long Term Evolution
  • LTE-Advanced of the current 3GPP series are high-speed and large-capacity communication systems that can transmit and receive various data such as video and wireless data out of voice-oriented services.
  • the development of technology capable of transferring large amounts of data is required. Meanwhile, since a single cell method cannot be applied to uplink transmission and reference signal transmission in a plurality of cells or small cells, a new technology and method are needed.
  • the present invention enables the base station to instruct the terminal to perform multiple sub-frame scheduling, multiple transmission time interval scheduling, or cross sub-frame scheduling.
  • the operation of the legacy terminal is maintained by not changing the current signal or channel structure.
  • the terminal receives a downlink signal including a downlink control channel including indication information signaling a type of scheduling and scheduling information related to scheduling.
  • a downlink control channel including indication information signaling a type of scheduling and scheduling information related to scheduling.
  • a method for transmitting a downlink control channel by a base station includes generating a downlink signal including a downlink control channel including indication information signaling a type of scheduling and scheduling information related to scheduling; And transmitting the generated downlink control channel and the downlink signal to a terminal, wherein the indication information indicates any one of multiple TTI, multiple subframe scheduling, cross subframe scheduling, or single subframe scheduling. Characterized in that.
  • a terminal is a transmitter for transmitting a signal to a base station, a downlink signal including scheduling information related to scheduling and a downlink control channel including indication information signaling a type of scheduling from the base station; Receiving a downlink control channel including a receiving unit and a control unit for performing any one of multiple TTI, multiple subframe scheduling, cross subframe scheduling or single subframe scheduling according to the indication information.
  • the base station is a receiving unit for receiving a signal from the terminal, a control unit for generating a downlink control channel including the indication information signaling the type of scheduling, and the generated downlink control channel to the terminal And a transmitter for transmitting a downlink signal including scheduling information related to scheduling, wherein the indication information indicates any one of multi-TTI, multi-subframe scheduling, cross-subframe scheduling, or single subframe scheduling.
  • the downlink control channel is transmitted.
  • a UE may perform multiple subframe scheduling, multiple TTI scheduling, or cross subframe scheduling according to an indication of a base station.
  • a UE belonging to a small cell environment or an arbitrary cell / base station / RRH / antenna / RU may perform multiple subframe scheduling, multiple TTI scheduling, or cross subframe scheduling to improve data throughput.
  • FIG. 1 is a diagram illustrating small cell deployment according to an embodiment.
  • FIG. 2 is a diagram illustrating a small cell deployment scenario.
  • FIG. 3 is a diagram illustrating a detailed scenario in small cell deployment.
  • FIG. 4 is a diagram of a control region for transmitting a downlink control channel.
  • 5 is a diagram illustrating transmission of a control channel in one subframe.
  • FIG. 6 is a view showing the operation of the terminal according to an embodiment of the present invention.
  • FIG. 7 is a diagram illustrating the operation of a base station according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating a configuration of a user terminal according to another embodiment.
  • FIG. 9 is a diagram illustrating a configuration of a base station according to another embodiment.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a comprehensive concept of a terminal in wireless communication.
  • UE user equipment
  • LTE Long Term Evolution
  • HSPA High Speed Packet Access
  • MS Mobile Station
  • UT User Terminal
  • SS Global System for Mobile communications
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS.
  • Base Transceiver System Access Point, Relay Node, Remote Radio Head, RRH, Radio Unit, Transmission Point, TP, Reception Point, RP, etc. It may be called in other terms.
  • a base station or a cell is interpreted in a comprehensive sense to indicate some areas or functions covered by a base station controller (BSC) in CDMA, a Node-B in WCDMA, an eNB or a sector (site) in LTE, and the like. It is meant to cover various coverage areas such as mega cell, macro cell, micro cell, pico cell, femto cell and relay node, RRH, RU communication range.
  • BSC base station controller
  • the base station may be interpreted in two senses. i) the device providing the megacell, the macrocell, the microcell, the picocell, the femtocell, the small cell in relation to the wireless area, or ii) the wireless area itself. In i) all devices which provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to direct the base station.
  • the eNB, RRH, antenna, RU, LPN, point, transmit / receive point, transmit point, receive point, etc. become embodiments of the base station according to the configuration of the radio region.
  • the base station may indicate the radio area itself to receive or transmit a signal from the viewpoint of the user terminal or the position of a neighboring base station.
  • megacells macrocells, microcells, picocells, femtocells, small cells, RRHs, antennas, RUs, low power nodes (LPNs), points, eNBs, transmit / receive points, transmit points, and receive points are collectively referred to as base stations. do.
  • the user terminal and the base station are two transmitting and receiving entities used to implement the technology or technical idea described in this specification in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • OFDM-CDMA OFDM-CDMA
  • One embodiment of the present invention can be applied to resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-Advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB.
  • the present invention should not be construed as being limited or limited to a specific wireless communication field, but should be construed as including all technical fields to which the spirit of the present invention can be applied.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • Uplink and downlink transmit control information through control channels such as Physical Downlink Control CHannel (PDCCH), Physical Control Format Indicator CHannel (PCFICH), Physical Hybrid ARQ Indicator CHannel (PHICH), and Physical Uplink Control CHannel (PUCCH).
  • a data channel is configured such as PDSCH (Physical Downlink Shared CHannel), PUSCH (Physical Uplink Shared CHannel) and the like to transmit data.
  • control information can also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a wireless communication system to which embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • antenna transmission system a cooperative multi-cell communication system.
  • the CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an eNB) and a high transmission power or a low transmission power in a macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • an eNB a base station or a macro cell
  • a high transmission power or a low transmission power in a macro cell region which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, and a PDSCH.
  • transmitting or receiving a PDCCH or transmitting or receiving a signal through a PDCCH may be used to mean transmitting or receiving an EPDCCH or transmitting or receiving a signal through an EPDCCH.
  • the physical downlink control channel described below may mean a PDCCH or an EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the PDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH.
  • high layer signaling described in the present specification includes RRC signaling for transmitting RRC information including an RRC parameter.
  • An eNB which is an embodiment of a base station, performs downlink transmission to terminals.
  • the eNB includes downlink control information and an uplink data channel (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required to receive the PDSCH.
  • a physical downlink control channel (PDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) may be transmitted.
  • PUSCH physical uplink shared channel
  • the first terminal UE1 may transmit an uplink signal to the eNB and the second terminal may transmit an uplink signal to the RRH.
  • FIG. 1 is a diagram illustrating small cell deployment according to an embodiment.
  • FIG. 1 illustrates a configuration in which a small cell and a macro cell coexist, and in FIGS. 2 to 3 below, whether macro coverage is present and whether the small cell is for outdoor or indoor.
  • the deployment of the small cell is divided in more detail according to whether or not to use the same frequency spectrum as the macro in terms of spectrum.
  • FIG. 2 is a diagram illustrating a small cell deployment scenario.
  • FIG. 2 shows a typical representative configuration for the scenario of FIG. 3.
  • 2 illustrates a small cell deployment scenario and includes scenarios # 1, # 2a, # 2b and # 3.
  • 200 denotes a macro cell
  • 210 and 220 denote small cells.
  • the overlapping macro cell may or may not exist.
  • Coordination may be performed between the macro cell 200 and the small cells 210 and 220, and coordination may also be performed between the small cells 210 and 220.
  • the overlapped areas of 200, 210, and 220 may be bundled into clusters.
  • FIG. 3 is a diagram illustrating a detailed scenario in small cell deployment.
  • the solid lines connecting the small cells in the small cells 312, 322, 332, and 342 refer to backhaul link within clusters.
  • the dotted lines connecting the base station of the macro cell and the small cells in the cluster mean a backhaul link between the small cell and the macro cell.
  • Scenario 1 is a co-channel deployment scenario of a small cell and a macro cell in the presence of an overhead macro and an outdoor small cell scenario.
  • 310 denotes a case where both the macro cell 311 and the small cell are outdoors, and 312 indicates a small cell cluster. Users are distributed both indoors and outdoors.
  • Scenario 2a is an deployment scenario in which the small cell and the macro use different frequency spectrums in the presence of an overlay macro and an outdoor small cell scenario. Both macro cell 321 and small cells are outdoors and 322 indicates a small cell cluster. Users are distributed both indoors and outdoors.
  • Scenario 2b is a deployment scenario in which the small cell and the macro use different frequency spectrums in the presence of an overlay macro and an indoor small cell scenario.
  • Macro cell 331 is outdoors, small cells are all indoors, and 332 denotes a small cell cluster. Users are distributed both indoors and outdoors.
  • Scenario 3 is an indoor small cell scenario in the absence of coverage of macros.
  • 342 indicates a small cell cluster.
  • small cells are all indoors, and users are distributed both indoors and outdoors.
  • the control region 410 includes transmission of PHICH, PCFICH, and PDCCH.
  • the control region may be configured with 1 to 3 OFDM symbols, but is not limited thereto.
  • the control region may be increased or decreased according to the situation of the system.
  • the PDCCH is spread evenly allocated to the number of OFDM symbols in which the PDCCH indicated by the PCFICH is transmitted, except for the resources used for the PHICH and the PCFICH, and then transmitted. Control signaling and a cell-specific reference symbol are distributed in a subframe.
  • FIG. 5 is a diagram illustrating transmission of a control region for transmitting a control channel in one subframe.
  • 510 and 520 are examples of transmission of a PDSCH indicated by a control channel transmitted in every subframe upon transmission of a PDSCH on multiple carriers.
  • CC # 1, # 2 and # 3 of 510 and 520 mean a 1st component carrier, a 2nd component carrier, and a 3rd component carrier, respectively.
  • 5 is a diagram illustrating transmission of a PDSCH indicated by a control channel transmitted in every subframe when a PDSCH is transmitted on a multiple carrier
  • 510 is an embodiment without cross carrier scheduling (No cross-carrier scheduling).
  • the carrier indicator is not included in the downlink control information (DCI).
  • DCI downlink control information
  • self-carrier scheduling is performed on multiple carriers, and a PDCCH exists in each carrier independently in each carrier to schedule a corresponding PDSCH.
  • 520 represents cross carrier scheduling on multiple carriers and includes a carrier indicator in DCI.
  • the present invention relates to a case in which a PDSCH can be scheduled to a plurality of carriers in one carrier.
  • a PDCCH existing in one carrier schedules a PDSCH that can be transmitted on a plurality of carriers.
  • data is transmitted in multiple carriers by a control channel transmitted every subframe within a 1 ms subframe.
  • Table 1 is a DCI format indicating a scheduling grant for uplink / downlink transmission. DCI formats are separately transmitted according to each uplink / downlink transmission method and usage.
  • the present invention provides multiple sub-frame scheduling of uplink / downlink when transmitting a scheduling grant for uplink / downlink transmission to a UE belonging to a small cell environment and a cell / base station / RRH / antenna / RU.
  • a method of transmitting a control signal of uplink / downlink transmission to support scheduling, multiple transmission time interval scheduling, or cross sub-frame scheduling is proposed.
  • the present invention reduces the data rate by a certain ratio in the case of transmitting a control channel for every subframe transmitted to a UE belonging to a small cell environment and a cell / base station / RRH / antenna / RU.
  • the present invention relates to a method for supporting multiple subframe scheduling in a standard for reducing control signal transmission to improve. More specifically, the present invention relates to a UE belonging to a small cell environment and a terminal belonging to a cell / base station / RRH / antenna / RU.
  • the present invention When transmitting a scheduling grant for / downlink transmission, the present invention relates to a method for transmitting a control signal of uplink / downlink transmission to support multiple subframe scheduling, multiple TTI scheduling, or cross subframe scheduling of uplink and downlink. .
  • the present invention when transmitting a scheduling grant for uplink / downlink transmission to a UE belonging to a small cell environment and an arbitrary cell / base station / RRH / antenna / RU, uplink / downlink multiple subframe scheduling, multiple TTI scheduling, or crossover
  • the present invention relates to a method for transmitting a control signal of uplink / downlink transmission to support subframe scheduling, which is backward compatible even when the terminal operates with a single subframe scheduling in an existing macro base station.
  • the present invention also relates to a method for transmitting or allowing a terminal to transmit multiple subframe scheduling.
  • the present invention provides for coverage of small cells and any cells / base stations / RRH / antennas / RUs that can be deployed independently and for coverage with macro cells / base stations / RRHs / antennas / RUs.
  • the terminal can support the backward compatibility.
  • the present patent set forth below describes a method and apparatus for transmitting downlink control signals in a small cell environment.
  • multi-TTI multi-subframe scheduling or cross-subframe scheduling to a small cell environment and an arbitrary cell / base station / RRH / antenna / RU
  • a method of informing scheduling information for each subframe should be considered.
  • the present invention proposes a signaling method for informing corresponding scheduling information as follows.
  • the methods herein can be considered as methods that can be applied to both up and down, respectively.
  • the 1-bit indicator indicating that the downlink DCI format, DCI format 1a / 1b / 1c / 1d / 2 / 2b / 2c / 2d, performs multi-TTI, multi-subframe scheduling or cross-subframe scheduling.
  • a method of adding is proposed.
  • the indicator may be 1 bit and multiple bits may also be considered. It may also be considered a method of indicating that the multi-subframe scheduling or the cross-subframe scheduling is performed using only a subset of the downlink DCI format.
  • the configuration of multi-TTI, multi-subframe scheduling or cross-subframe scheduling is possible in the RRC parameter, and multi-TTI, multi-sub on the downlink and uplink DCI formats according to whether the corresponding RRC parameter is configured.
  • a method of determining the existence and validity of 1 bit or multiple bits indicating size of frame scheduling or cross subframe scheduling may be considered.
  • the RRC may be information required for setting any one of multi-TTI, multi-subframe scheduling, or cross-subframe scheduling, and the necessary information indicates setting of any of multi-TTI, multi-subframe scheduling or cross-subframe scheduling. May be information.
  • the RRC parameter may be considered as UE dedicated signaling, and as another example, the RRC parameter may be considered as a method for configuring common signaling. That is, whether all of the UEs belonging to one eNB or cell are configured to enable multi-TTI, multi-subframe scheduling, or cross-subframe scheduling with common signaling according to characteristics of the corresponding cell, and indicate downlink and uplink DCI formats indicated to the UE. Multi-TTI, multi-subframe scheduling for the transmission of the PDSCH and the transmission of the PUSCH according to 1 bit or more bits indicating that the multi-TTI, multi-subframe scheduling or cross-subframe scheduling is performed on A method of performing cross subframe scheduling may be applied.
  • a method of adding to an existing RRC parameter set may be considered.
  • a method of including in a configuration for cross-carrier scheduling may be considered.
  • a method of indicating the number of subframes for multi-TTI (or subframe) scheduling may be considered.
  • the present invention relates to a method of indicating the number of subframes in multi-TTI (or subframe) scheduling.
  • the number of subframes used by or used in each cell may be fixed, or semi-static RRC may indicate the number of subframes for multiple TTI (or subframe) scheduling. Can be considered. For example, there may be a case where the number of subframes is fixed to one, and a method of indicating one of the sets with a set of the number of subframes may be considered.
  • the number of subframes to be scheduled through the PDCCH / EPDCCH may be dynamically indicated.
  • another method that can be further considered is semi-statically indicating the number of subframes for multiple TTI (or subframe) scheduling with RRC and dynamically indicating the number of subframes used through PDCCH / EPDCCH.
  • Mixed methods of mixing possible ways can be considered. That is, the number of subframes for scheduling multiple TTIs (or subframes), which are semi-statically set to RRC, is designated as the number of subframes capable of scheduling maximum TTI (or subframes), and the actual scheduling is performed through PDCCH / EPDCCH.
  • the number of subframes used depends on the maximum number of subframes defined in RRC.
  • the size of bits for indicating the number of subframes dynamically specified from PDCCH / EPDCCH It is possible to perform scheduling for the number of subframes according to (bit width). That is, when the bit size is set to 1 bit, one of the candidate groups of ⁇ 1,4 ⁇ may be indicated, and when the bit size is set to 2 bits, the ⁇ 1,2,3,4 ⁇ value is set. It may be possible to indicate one of the candidate groups.
  • the number of subframes to be scheduled is indicated as ⁇ 1,2,4,8 ⁇ . You can do it.
  • a method of configuring the number of subframes according to the maximum number of subframes may be considered as a method of setting the number of subframes up to the maximum number of subframes.
  • a method of designating all of the candidate groups may be considered.
  • a hybrid scheme indicating the number of subframes is based on a range of the number of subframes included in the downlink channel or included in the RRC parameter of the downlink channel transmitted before transmission of the downlink channel. The number of subframes required for multiple TTI, multiple subframe scheduling, or cross subframe scheduling can be indicated.
  • scheduling of the corresponding multiple subframes can always be fixedly determined as continuous multiple subframe scheduling.
  • the UE downlinks the downlink and downlink control channels, that is, when the BDC decoding of the PDCCH / EPDCCH is performed.
  • a procedure of a terminal for detecting a grant and an uplink grant will be described as follows.
  • DCI format 1a and uplink which are DL grants containing downlink scheduling information for the corresponding UE in a dedicated UE search space rather than a UE common search space
  • the operation of the terminal is defined to find DCI format 0, which is an UL grant containing scheduling information.
  • a terminal to which multi-TTI, multi-subframe scheduling or cross-subframe scheduling is applicable may be configured to always search for a grant containing relevant downlink scheduling information and uplink scheduling information in a UE-specific search space when performing a related operation. Can be.
  • intra and inter frequency hopping or "inter-frequency hopping” for PUSCH transmission may be turned off.
  • a frequency hopping flag is not necessary in this case.
  • a method of indicating that subframe scheduling or cross subframe scheduling is performed may be considered.
  • an instruction for multi-TTI, multi-subframe scheduling or cross-subframe scheduling is performed by using a code point remaining in information used for uplink DCI format 0 or 4.
  • the implicit indication method of performing the indication for the multi-TTI, the multi-subframe scheduling or the cross-subframe scheduling for the downlink is performed in the downlink DCI format 1a / 1b / 1c / 1d / 2 / 2b / 2c / 2d.
  • a method of using the remaining code point among the included information elements may be considered.
  • CIF carrier indicator field
  • PDCCH / EPDCCH a value called a carrier indicator field
  • uplink and A carrier indicator is included as 0 or 3 bits in the DCI format 0/4 and the DCI format 1 / 1A / 1B / 1D / 2 / 2A / 2B / 2C / 2D, which are downlink scheduling grants.
  • CIF ie, cross carrier scheduling is not set to RRC, it means that cross carrier scheduling cannot be used. If CIF is set, cross carrier scheduling is enabled with 3 bits. will be.
  • the number of component carriers that can be supported by the standard is limited to 5 downlink and 5 uplink.
  • the number of cases that can be indicated by 3bits as a carrier indicator may be able to indicate eight of the component carriers 0-7, but currently only supports five of the uplink and downlink supported by the current standard
  • the method may be considered to use the number of such cases as self-carrier scheduling and use it as signaling for multiple subframe scheduling or multiple TTI scheduling or cross subframe scheduling.
  • the carrier indicator uses the value 0-4 indicated by the carrier indicator as the cross carrier scheduling, and the multi-subframe scheduling, the multi-TTI scheduling, or the crossover for the 5-7 values that the remaining carrier indicators may have. It is used as signaling for subframe scheduling.
  • This may be considered as a method that can be mainly applied in a scenario in which CA is enabled by adding a carrier in a small cell to a macro cell carrier under various scenarios of the small cell described in the background of the present invention. In other scenarios, the technique may be applicable.
  • scheduling of the corresponding multiple subframes can always be fixedly determined as continuous multiple subframe scheduling, and scheduling of the corresponding multiple subframes is Explicit / implicit signaling may be further considered as a way to indicate whether it is continuous or discontinuous. This may be a method of indicating whether it is continuous or discontinuous (an example of distinguishing between even and odd subframes). Therefore, explicit signaling of a bit for performing the indication may be considered, and there may be a method in which the explicit signaling is indicated together with an indicator for scheduling multiple subframes (or TTIs), and multiple subframes (or TTIs). ) May be considered a method of indicating independently from the indicator for scheduling.
  • Implicit signaling that can indicate whether scheduling of multiple subframes is continuous or discontinuous can be considered.
  • There may be a method of using a code point on the DCI format and one specific embodiment may include a code point for a continuous subframe and a code point for a discontinuous subframe, respectively, among three code points remaining in the CIF. It may be considered a method of designating one by specifying one.
  • the base station By allowing the base station to control the flexibility of resource allocation for the amount of data to be transmitted by the terminal at the same time as the frequency unit, the UE experience is improved due to the increase in data traffic.
  • the UE experience is improved due to the increase in data traffic.
  • PDCCH / EPDCCH for allocating scheduling grant when UE receives / transmits uplink PDSCH / PUSCH transmission for each subframe, data throughput for uplink / downlink can be improved. have.
  • uplink / downlink multiple subframe scheduling when transmitting a scheduling grant for uplink / downlink transmission to a UE belonging to a small cell environment and an arbitrary cell / base station / RRH / antenna / RU, uplink / downlink multiple subframe scheduling, multiple TTI scheduling or cross subframe
  • a process of transmitting and receiving a downlink control signal between a base station and a terminal for transmitting a control signal of uplink / downlink transmission to support scheduling will be described.
  • FIG. 6 is a view showing the operation of the terminal according to an embodiment of the present invention.
  • the terminal receives a downlink control channel including indication information signaling the type of scheduling and a downlink signal including scheduling information related to scheduling from the base station (S610).
  • One embodiment of the scheduling information refers to an RRC parameter for performing multiple subframe scheduling or cross subframe.
  • the terminal performs one of multiple TTI, multiple subframe scheduling, cross subframe scheduling, or single subframe scheduling according to the indication information (S620).
  • Performing scheduling means controlling to transmit and receive a signal according to the scheduling.
  • the indication information having a size of 1 bit or more may be included in the DCI format of the control channel.
  • the terminal may search for DCI format 0 or DCI format 1a / 1b / 1c / 1d / 2 / 2b / 2c / 2d in the dedicated search space of the terminal.
  • the DCI includes indication information having a size of 1 bit or more, and scheduling information related to scheduling included in the downlink signal is required to configure any one of multiple TTI, multiple subframe scheduling, cross subframe scheduling, or single subframe scheduling. It may include a Radio Resource Control (RRC) parameter including information.
  • RRC Radio Resource Control
  • the RRC parameter included in the indication information or the downlink signal may include information indicating the number of subframes required for multi-TTI, multi-subframe scheduling, or cross-subframe scheduling, and the number of subframes in a hybrid manner.
  • the terminal may transmit multiple TTIs by the indication information based on a range of the number of subframes included in the downlink signal or included in the RRC parameter of the downlink signal received before the downlink signal is received. The number of subframes required for multiple subframe scheduling or cross subframe scheduling can be checked.
  • a frequency hopping flag of the downlink signal may include the indication information
  • the downlink control channel may have a remaining code in DCI format.
  • the point may include the indication information.
  • the downlink control channel may include any one of values not used as a carrier indicator of the CIF field as the indication information. For example, if a value of 0 to 4 is used as a carrier indicator, any one of 5, 6, and 7 may be included as indication information.
  • the downlink signal includes continuous information of a plurality of subframes in the multi-TTI, multi-subframe scheduling or cross-subframe scheduling by a second indicator distinguished from the indication information or the indication information.
  • the indication information or the second indication information may use a code point on a DCI format or a code point of a CIF.
  • FIG. 7 is a diagram illustrating the operation of a base station according to an embodiment of the present invention.
  • the base station generates a downlink signal including the downlink control channel including the indication information signaling the type of scheduling and scheduling information related to the scheduling (S710), and transmits the generated downlink control channel and the downlink signal to the terminal It transmits (S720).
  • the indication information indicates any one of multiple TTI, multiple subframe scheduling, cross subframe scheduling, or single subframe scheduling.
  • One embodiment of the scheduling information refers to an RRC parameter for performing multiple subframe scheduling or cross subframe.
  • the base station includes the indication information having a size of 1 bit or more in the DCI format when generating the downlink signal.
  • DCI format 0 or DCI format 1a / 1b / 1c / 1d / 2 / 2b / 2c / 2d is included in the dedicated search space of the terminal so that the terminal can search in the dedicated search space.
  • detailed information may be included through RRC.
  • the base station includes indication information having a size of 1 bit or more in the DCI when the downlink is generated, and scheduling information related to scheduling included in the downlink signal is multi-TTI, multi-sub.
  • a radio resource control (RRC) parameter including information necessary for setting one of frame scheduling, cross subframe scheduling, or single subframe scheduling may be included.
  • the BS In order to indicate the number of subframes, the BS generates a downlink signal, and the indication information or the RRC parameter included in the downlink signal indicates the number of subframes required for multi-TTI, multi-subframe scheduling or cross-subframe scheduling. Information can be included.
  • the indication information is multi-TTI, based on the range of the number of subframes included in the downlink signal or included in the RRC parameter of the downlink signal transmitted before the transmission of the downlink signal to indicate a hybrid scheme.
  • a downlink signal may be generated to indicate the number of subframes required for multiple subframe scheduling or cross subframe scheduling.
  • the base station may include the indication information in a frequency hopping flag when frequency hopping in the uplink signal is deactivated when generating the downlink signal.
  • the indication information may be included in the remaining code point of the DCI format.
  • the base station may generate the downlink signal such that any one of values not used as carrier indicators of the CIF field becomes the indication information. For example, if a value of 0 to 4 is used as a carrier indicator, any one of 5, 6, and 7 may be included as indication information.
  • the base station determines that the downlink signal is continuous information of a plurality of subframes in the multi-TTI, multi-subframe scheduling, or cross-subframe scheduling in which a second indication distinguished from the indication information or the indication information
  • the downlink signal may be generated to include a.
  • the indication information or the second indication information may use a code point on a DCI format or a code point of a CIF.
  • the present invention relates to a method for transmitting a downlink control signal for a UE belonging to a small cell and an arbitrary cell / base station / RRH / antenna / RU in a multi-layer cell structure. More specifically, a grant for scheduling of multiple subframes is provided.
  • the method for transmitting the base station to the terminal has been described.
  • a terminal device using the method and a base station device for transmitting corresponding scheduling information will be described.
  • FIG. 8 is a diagram illustrating a configuration of a user terminal according to another embodiment.
  • the user terminal 800 includes a receiver 830, a controller 810, and a transmitter 820.
  • the receiver 830 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • control unit 810 is a small cell environment required to carry out the above-described present invention and when a terminal belonging to any cell / base station / RRH / antenna / RU receives a scheduling grant for uplink / downlink transmission. Controls the overall operation of the UE according to receiving a control signal of uplink / downlink transmission for performing downlink multiple subframe scheduling, multiple TTI scheduling, or cross subframe scheduling.
  • the transmitter 820 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • the receiving unit 830 receives a downlink control channel including the downlink control channel including the indication information signaling the type of scheduling from the base station and the downlink signal including the scheduling information related to the scheduling, and the control unit 810 indicates the indication.
  • the information any one of multiple TTI, multiple subframe scheduling, cross subframe scheduling, or single subframe scheduling is performed.
  • Performing scheduling means controlling to transmit and receive a signal according to the scheduling.
  • One embodiment of the scheduling information refers to an RRC parameter for performing multiple subframe scheduling or cross subframe.
  • the indication information having a size of 1 bit or more may be included in the DCI format of the control channel.
  • the controller 810 may search for DCI format 0 or DCI format 1a / 1b / 1c / 1d / 2 / 2b / 2c / 2d in a dedicated search space of the terminal.
  • the DCI includes indication information having a size of 1 bit or more, and scheduling information related to scheduling included in the downlink signal is required to configure any one of multiple TTI, multiple subframe scheduling, cross subframe scheduling, or single subframe scheduling. It may include a Radio Resource Control (RRC) parameter including information.
  • RRC Radio Resource Control
  • the RRC parameter included in the indication information or the downlink signal may include information indicating the number of subframes required for multi-TTI, multi-subframe scheduling, or cross-subframe scheduling, and the number of subframes in a hybrid manner. If indicated, the control unit 810 is configured to multiply the indication information based on the range of the number of subframes included in the downlink signal or included in the RRC parameter of the downlink signal received before the downlink signal is received. The number of subframes required for TTI, multiple subframe scheduling, or cross subframe scheduling can be checked.
  • a frequency hopping flag of the downlink signal may include the indication information
  • the downlink control channel may have a remaining code in DCI format.
  • the point may include the indication information.
  • the downlink control channel may include any one of values not used as a carrier indicator of the CIF field as the indication information. For example, if a value of 0 to 4 is used as a carrier indicator, any one of 5, 6, and 7 may be included as indication information.
  • the downlink signal includes continuous information of a plurality of subframes in the multi-TTI, multi-subframe scheduling or cross-subframe scheduling in which the indication information or a second indication distinguished from the indication information is included.
  • the indication information or the second indication information may use a code point on a DCI format or a code point of a CIF.
  • FIG. 9 is a diagram illustrating a configuration of a base station according to another embodiment.
  • the base station 900 includes a control unit 910, a transmitter 920, and a receiver 930.
  • the uplink / downlink Controls the overall operation of the base station according to the transmission of the control signal of the uplink / downlink transmission to support multiple subframe scheduling, multiple TTI scheduling or cross-subframe scheduling.
  • the transmitter 920 and the receiver 930 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.
  • the controller 910 generates a downlink signal including a downlink control channel including indication information signaling a type of scheduling and scheduling information related to scheduling, and the transmitter 920 generates the downlink signal to the terminal.
  • the downlink control channel and the downlink signal is transmitted.
  • the indication information indicates one of multiple TTI, multiple subframe scheduling, cross subframe scheduling, or single subframe scheduling.
  • One embodiment of the scheduling information means an RRC parameter for performing multiple subframe scheduling or cross subframe.
  • the controller 910 includes the indication information having a size of 1 bit or more in the DCI format when generating the downlink signal.
  • DCI format DCI format 0 or DCI format 1a / 1b / 1c / 1d / 2 / 2b / 2c / 2d is included in the dedicated search space of the terminal so that the terminal can search in the dedicated search space.
  • the RRC may include detailed information.
  • the control unit 910 includes indication information having a size of 1 bit or more in the DCI, and scheduling information related to scheduling included in the downlink signal includes multiple TTIs.
  • Radio Resource Control (RRC) parameter including information required to configure any one of the multiple subframe scheduling, the cross subframe scheduling, or the single subframe scheduling.
  • RRC Radio Resource Control
  • the control unit 910 In order to indicate the number of subframes, the control unit 910 generates the downlink signal, and the indication information or the RRC parameter included in the downlink signal includes a subframe required for multi-TTI, multi-subframe scheduling or cross-subframe scheduling. Information indicating the number may be included.
  • the indication information is multi-TTI, based on the range of the number of subframes included in the downlink signal or included in the RRC parameter of the downlink signal transmitted before the transmission of the downlink signal to indicate a hybrid scheme.
  • a downlink signal may be generated to indicate the number of subframes required for multiple subframe scheduling or cross subframe scheduling.
  • the controller 910 may include the indication information in a frequency hopping flag when frequency hopping in the uplink signal is deactivated when generating the downlink signal.
  • the indication information may be included in the remaining code point of the DCI format.
  • the controller 910 may generate the downlink signal such that any one of values not used as carrier indicators of the CIF field becomes the indication information. For example, if a value of 0 to 4 is used as a carrier indicator, any one of 5, 6, and 7 may be included as indication information.
  • the control unit 910 determines that the downlink signal has a plurality of subframes in the multi-TTI, multi-subframe scheduling or cross-subframe scheduling.
  • the downlink signal may be generated to include continuous information of and in another manner, the indication information or the second indication information may use a code point on a DCI format or a code point of a CIF.
  • the method and apparatus described so far include multiple subframe scheduling of multiple uplink / downlink when transmitting scheduling grant for uplink / downlink transmission to a UE belonging to a small cell environment and an arbitrary cell / base station / RRH / antenna / RU.
  • a method and apparatus for transmitting and receiving a downlink control signal that is, a downlink control channel for transmitting a control signal of uplink / downlink transmission for supporting TTI scheduling or cross subframe scheduling.

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

Abstract

La présente invention concerne un procédé permettant de transmettre et de recevoir un canal de commande en liaison descendante, et un appareil destiné audit procédé. Le procédé permettant de recevoir le canal de commande en liaison descendante par un terminal selon un mode de réalisation de la présente invention comprend les étapes consistant à : recevoir un canal de commande en liaison descendante et un signal en liaison descendante à partir d'une station de base, le canal de commande en liaison descendante comprenant des informations d'indicateur permettant au terminal de signaler le type d'une planification, le signal en liaison descendante comprenant des informations de planification liées à la planification ; et effectuer n'importe quelle planification parmi une planification à TTI multiples, une planification à sous-trames multiples, une planification à sous-trames croisées et une planification à sous-trame unique, selon les informations d'indicateur.
PCT/KR2014/002768 2013-04-02 2014-04-01 Procédé permettant de transmettre et de recevoir un canal de commande en liaison descendante, et appareil destiné audit procédé WO2014163368A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR20130035618 2013-04-02
KR10-2013-0035618 2013-04-02
KR20130037066 2013-04-04
KR10-2013-0037066 2013-04-04
KR10-2013-0128220 2013-10-28
KR1020130128220A KR20140120249A (ko) 2013-04-02 2013-10-28 하향링크 제어채널의 전송 및 수신 방법과 그 장치

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