WO2014157890A1 - Procédé d'émission et de réception de signal de référence de liaison montante et dispositif correspondant - Google Patents

Procédé d'émission et de réception de signal de référence de liaison montante et dispositif correspondant Download PDF

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Publication number
WO2014157890A1
WO2014157890A1 PCT/KR2014/002451 KR2014002451W WO2014157890A1 WO 2014157890 A1 WO2014157890 A1 WO 2014157890A1 KR 2014002451 W KR2014002451 W KR 2014002451W WO 2014157890 A1 WO2014157890 A1 WO 2014157890A1
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WIPO (PCT)
Prior art keywords
reference signal
indication information
uplink
base station
terminal
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PCT/KR2014/002451
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English (en)
Korean (ko)
Inventor
노민석
최우진
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주식회사 케이티
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Priority claimed from KR1020130117231A external-priority patent/KR20140118678A/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2014157890A1 publication Critical patent/WO2014157890A1/fr

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    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • 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
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks

Definitions

  • the present invention relates to a method for transmitting and receiving uplink data transmission and reference signals in a small cell or multiple cell environment under a multi-layer cell structure, and a terminal and a base station apparatus using the method.
  • LTE Long Term Evolution
  • LTE-Advanced of the current 3GPP series are high-speed, high-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 intends to provide a process and apparatus for configuring a terminal so that reference signals necessary for performing uplink transmission in a plurality of cells or small cells can maintain orthogonality, and indicating the configuration by a base station.
  • the above-described process and apparatus do not affect the operation of the legacy legacy terminal and may increase the efficiency of generating and transmitting the reference signal of the terminal operating in a small cell environment or a plurality of cell environments.
  • the terminal receiving a downlink channel including indication information necessary for transmitting a reference signal from a base station, the reference information according to the indication information Generating a signal, and transmitting an uplink channel by including a reference signal in N slots of consecutive 2N slots, wherein N is a natural number of 1 or more and the indication information is a multiple transmission time interval (TTI). ) Or explicitly or implicitly indicating multiple subframe scheduling.
  • TTI transmission time interval
  • the base station In a method for receiving an uplink reference signal by a base station according to another embodiment of the present invention, the base station generates a downlink channel including the indication information necessary for transmitting the reference signal, and the generated downlink channel to the terminal And transmitting the uplink channel by including a reference signal in N slots of consecutive 2N slots, wherein N is a natural number of 1 or more, and the indication information is a multiple transmission time interval (TTI). ) Or explicitly or implicitly indicating multiple subframe scheduling.
  • TTI transmission time interval
  • a terminal for transmitting an uplink reference signal includes a receiver for receiving a downlink channel including indication information necessary for transmitting a reference signal from a base station, a controller for generating a reference signal according to the indication information; And a transmitter configured to transmit an uplink channel by including a reference signal in N slots among consecutive 2N slots, wherein N is a natural number of 1 or more, and the indication information includes multiple transmission time interval (TTI) or multiple subframe scheduling. It is characterized by indicating explicitly or implicitly.
  • TTI transmission time interval
  • a base station for receiving an uplink reference signal includes a control unit for generating a downlink channel including indication information necessary for transmitting a reference signal, and a transmitter for transmitting the generated downlink channel to a terminal.
  • the terminal transmits an uplink channel by including a reference signal in N slots of consecutive 2N slots, wherein N is a natural number of 1 or more, and the indication information is a multiple transmission time interval (TTI) or multiple subframes. It is characterized by indicating the scheduling explicitly or implicitly.
  • TTI transmission time interval
  • the terminal may be configured such that reference signals necessary for performing uplink transmission in a plurality of cells or small cells may maintain orthogonality, and may be indicated by the base station during such configuration.
  • the transmission of the reference signal is configured to be suitable for the environment of multiple cells or small cells, data transmission efficiency can be improved.
  • 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 illustrating a structure of a subframe in a PUSCH transmission to which the present invention is applied.
  • FIG. 5 is a diagram illustrating an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in a normal CP according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in an extended CP according to an embodiment of the present invention.
  • FIG. 7 is a diagram illustrating a process of operating a terminal according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating a process of operating a base station according to an embodiment of the present invention.
  • FIG. 9 is a diagram illustrating a configuration of a user terminal according to another embodiment.
  • FIG. 10 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 a Radio Resource Control (RRC) parameter.
  • RRC Radio Resource Control
  • 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 6 below, 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 following shows a frame structure for uplink data transmission and reference signal (RS) transmission in LTE and LTE-Advanced.
  • 4 is a diagram showing a structure of a subframe in a PUSCH transmission to which the present invention is applied.
  • 410 shows a subframe structure in case of PUSCH transmission and a case of normal CP.
  • 411 is the first slot (1 st slot)
  • 412 is the second slot (2 nd slot).
  • 420 is a subframe structure in the case of PUSCH transmission and illustrates an extended CP (extended CP) case.
  • 421 is the first slot and 422 is the second slot.
  • the first slot and the second slot may be allocated to different frequency domains according to whether or not frequency hopping is performed.
  • the UE receives the following information from any base station or any cell.
  • the information to be received are parameters for generating a reference signal transmitted by the UE, that is, a sequence group index, a sequence index, a cyclic shift index, and an orthogonal cover.
  • code Receives the index information from the base station to which the terminal belongs. i) UE and a sequence group index and sequence index according to the configuration of the sequence group hopping and sequence hopping set to the cell ID and RRC configured to perform the classification of the corresponding base station It is supposed to inform.
  • the terminal generates a reference signal for data demodulation and transmits the reference signal and the uplink PUSCH to an arbitrary base station.
  • a reference signal is transmitted for demodulation of a data channel, which is transmitted on every uplink subframe.
  • One symbol for each slot is used for the uplink reference signal on the frequency domain to which the data channel is allocated or on the same frequency domain as the RBs.
  • This fixedly reduces the data rate for uplink transmission in the terminal, for example, 1/7 (14.3%) per subframe in the case of normal CP and 1 in the case of extended CP. Decreases / 6 (16.7%).
  • a method for reducing such RS overhead may be considered. .
  • the present invention relates to an uplink data channel and a reference signal transmission method capable of reducing overhead of a reference signal in a case where a small cell environment and an arbitrary cell / base station / RRH / antenna / RU can limit UE mobility at a low speed. It is about.
  • the present invention provides a backward compatibility of the terminal in the deployment of the small cell and any cell / base station / RRH / antenna / RU that can be deployed independently and in the overlay overlaying the coverage with the macro cell / base station / RRH / antenna / RU
  • the present invention relates to a method for transmitting an uplink data channel and a reference signal to support backward compatibility.
  • an OCC having a length-2 should be designed to maintain orthogonality of uplink reference signals between antennas / layers. do. That is, the number of SC-FDMA or DFT-spread OFDM symbols to which an uplink reference signal is allocated should be designed to maintain a multiple of two.
  • the following is designed to transmit a PUSCH on multiple layers according to various embodiments, and uplink reference signal and data transmission that can improve uplink data throughput by reducing overhead of an uplink reference signal. Look at the structure for.
  • a new UE that is, a UE performing multiple TTI (or subframe) scheduling and an existing legacy UE performing a single subframe scheduling allocate resources on the same frequency resource.
  • the new terminal and the legacy terminal are multiplexed to maintain orthogonality of the uplink reference signal. That is, as in the legacy structure, although different UEs configure uplink SDMA or MU-MIMO by the scheduling of the base station to allocate frequency resources of the same PUSCH, data throughput according to maintaining orthogonality of the uplink reference signal is improved. In this way, the transmission structure of the uplink reference signal and the PUSCH can be modified as follows, and the overhead of the reference signal can be reduced to increase data throughput.
  • FIG. 5 is a diagram illustrating an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in a normal CP according to an embodiment of the present invention.
  • 510, 520, 530, and 540 are composed of data symbols and RS symbols according to respective TTI or subframe scheduling.
  • FIG. 6 is a diagram illustrating an example of a PUSCH subframe structure according to multiple TTI (or subframe) scheduling in an extended CP according to an embodiment of the present invention.
  • 610, 620, 630, and 640 are composed of data symbols and RS symbols according to respective TTI or subframe scheduling.
  • the first slot and the second slot of each subframe can be allocated to different frequency domains, and the resource allocation of the PUSCH is performed through one scheduling grant, so that the first subframe and the second subframe are performed.
  • the frequency hopping pattern of the PUSCH of the frame is set to be the same. In this case, demodulation is performed based on a reference signal in a slot in which a demodulation reference signal exists on the same frequency domain in a slot during PUSCH demodulation for uplink PUSCH transmission.
  • 510 of FIG. 5 since the resource allocation area is the same in the frequency domain for the PUSCH in slot 0 and slot 2, demodulation is performed based on the demodulation reference signal in slot 0. In slot 1 and slot 3, Since the resource allocation region in the frequency domain for the PUSCH is equal, demodulation is performed based on a demodulation reference signal in slot 3.
  • 510 of FIG. 5 has been described as an example, similarly, 520, 530, and 540 of FIG. 5 also perform demodulation of the PUSCH of the same resource allocation region based on a slot having a demodulation reference signal.
  • the normal CP that is, for the extended CP, that is, 610, 620, 630, and 640 of FIG.
  • the PUSCH of the same resource allocation region based on the slot having the demodulation reference signal is similarly described in FIG. 5. Allow demodulation to be performed. In case of frequency hopping between subframes, demodulation on PUSCH transmission is performed based on a demodulation reference signal existing in each subframe.
  • FIGS. 5 and 6 may have the following characteristics. First, as shown in FIGS. 5 and 6, since channel change does not occur significantly in a low mobility situation, after performing accurate channel estimation at a position of a reference signal, interpolation or interpolation for channel estimation in a data symbol without a reference signal is performed. Interpolation), and in this case the channel estimate of the data channel is interpolated based on the exact channel estimate at the position of the reference signal due to the channel with little change. Reliability can be secured.
  • 520 and 620 of FIGS. 5 and 6 are allocated so that the channel of the reference signal to which the OCC is allocated is most similar when estimating the OCC allocated reference signal used for transmission of multiple layers.
  • an error of a channel estimation value of a reference signal for example, a mean square error value with a real channel at a position in the reference signal can be measured low. Therefore, since the interpolation and extrapolation (extrapolation) or the extrapolation of the data channel is performed with the corresponding channel estimation value, it has the advantage of ensuring the reliability of channel estimation for the data channel.
  • 5, 6, 530, 540, 630, and 640 have the advantage of taking the same reference signal pattern in every subframe when viewed based on one subframe. There is an advantage that the physical channel can be mapped based on one subframe instead of the two subframes that are supposed to map the physical channel.
  • a method of setting a pattern four or two orthogonal patterns are assigned and each terminal is specifically assigned.
  • a method of configuring a pattern used by the UE among four or two patterns there may be a method of directly indicating a corresponding pattern on an explicit signaling, for example, an uplink DCI format.
  • a method for setting different patterns so that different reference signal symbols between UEs belonging to each cell can be allocated. This will be a way to set different patterns based on the cell ID.
  • the number of subframes used for scheduling multiple TTIs and multiple subframes is represented by two subframes and four slots in FIGS. 5 and 6 of the present invention. May be extended. That is, by extending the embodiments of FIGS. 5 and 6, a reference signal may be transmitted while guaranteeing orthogonality among one subframe among 2M subframes (M is a natural number of 1 or more). In other words, it is possible to transmit a reference signal while guaranteeing orthogonality in N (N is a natural number of 1 or more) slots of 2N slots.
  • 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.
  • DCI which is a scheduling grant
  • multiple TTI or multiple subframe scheduling may be performed by being included in UL DCI format 0 or DCI format 4 or a new DCI format which is an uplink scheduling grant.
  • an indicator is added to DCI format 1a / 1b / 1c / 1d / 2b / 2c / 2d, which is a downlink DCI format, indicating 1 bit indicating that multi-TTI, multi-subframe scheduling or cross-subframe scheduling is performed. can do. 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 whether 1 bit indicating that frame scheduling or cross subframe scheduling is performed may be considered.
  • a method of indicating the number of subframes for multiple TTI (or subframe) scheduling may be considered. This is an embodiment for indicating the number of subframes in multi TTI (or subframe) scheduling. Alternatively, there may be a method of fixing the number of subframes used in each cell, and a method of indicating the number of subframes for multiple TTI (or subframe) scheduling in RRC semi-statically. Can be considered. Alternatively, a method of dynamically indicating the number of subframes to be scheduled through the PDCCH / EPDCCH may be considered.
  • the UE downlinks the downlink and uplink 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 below.
  • the UE detects the PDCCH / EPDCCH, the DCI format 1a and the DL grant, which are DL grants containing downlink scheduling information for the UE, in the UE dedicated search space rather than the UE common search space
  • the operation of the terminal is defined to find DCI format 0 and DCI format 4, which are UL grants containing link scheduling information. Accordingly, after the Rel-12, the UE may be configured to always search for a grant containing the relevant downlink scheduling information and the uplink scheduling information in the UE-specific search space.
  • intra and inter frequency hopping or "inter-frequency hopping” for PUSCH transmission may be turned off.
  • the frequency hopping flag is not needed, and thus, multiple TTI, multiple subframe scheduling or cross sub using 1 bit of the corresponding frequency hopping flag. It may indicate that frame scheduling is performed.
  • an instruction for multi-TTI, multi-subframe scheduling or cross-subframe scheduling may be performed using a code point remaining in information used for uplink DCI format 0 or 4.
  • an implicit indication method for performing an indication for multiple TTI, multiple subframe scheduling or cross subframe scheduling is also included in the downlink DCI format 1a / 1b / 1c / 1d / 2b / 2c / 2d.
  • a method of using the remaining code point among the information elements may be considered.
  • the implicit embodiment there may be a method of determining a reference signal allocation pattern of the terminal to depend on a value indicated in a cyclic shift field transmitted on a DCI format allocated to the terminal.
  • the value of the cyclic shift field is as follows, and the reference signal allocation pattern may be applied according to the value, and the terminal checks the value of the cyclic shift field on the received DCI format to determine the reference signal allocation pattern. Can be applied.
  • it may be set as shown in Table 1. It is assumed that the terminal and the base station have already shared the information on how the respective reference signal allocation patterns shown in Table 1 allocate the reference signal, and the information in Table 1 is also the state previously shared by the terminal and the base station.
  • 2N (N is a natural number), such as modulo 4 or modulo 2, may be used.
  • N becomes 2, so that when a reference signal is allocated to N slots among 4 consecutive slots, C-RNTI is divided by 4, so that the remainder is 1, the first pattern and the remainder are 2 If the pattern, the remainder is 3, the third pattern, if the remainder is 0 can be applied as the fourth pattern.
  • the reference signal allocation scheme for each pattern is already shared by the base station and the terminal.
  • One embodiment of the present invention presented below relates to a method of transmitting an uplink control channel according to downlink transmission and to a method of transmitting UCI according to uplink multiple subframe scheduling.
  • PUCCH resources may be set and PUCCH transmission may be simultaneously transmitted with PUSCH transmission.
  • Uplink control information eg, ACK / NACK
  • CSI, SR may be configured to piggyback with a PUSCH scheduled in multiple subframes.
  • the UCI is mapped as in the existing legacy structure having two reference signal symbols in one subframe.
  • the PUCCH transmission is defined to be transmitted only to the primary cell. Therefore, the macro cell / base station / RRH / antenna / RU to be considered as the primary cell is transmitted on the PUCCH or there is a PUSCH in the primary cell. In case there is no RRC setting for simultaneous transmission of PUCCH and PUSCH, the corresponding UCI is piggybacked to PUSCH, and if there is an RRC setting for simultaneous transmission of PUCCH and PUSCH, if it is allowed, UCI is transmitted on PUCCH.
  • One embodiment of the present invention presented below relates to a PHICH resource allocation scheme for ACK / NACK transmission according to PUSCH transmission of multiple TTIs when multiple TTI (or subframe) scheduling of an uplink PUSCH is performed.
  • a transport block is configured in units of a plurality of subframes and a scheduling grant exists for a plurality of subframes
  • the allocation of PHICH resources and multiplexing between terminals are performed by a cyclic shift value of a DMRS field present in a scheduling grant of.
  • n_DMRS allows the allocation of PHICH resources and multiplexing between terminals.
  • the cyclic shift value and the second of the DMRS used in the first subframe indicated by the cyclic shift value (n_DMRS) of the DMRS field by the scheduling grant is different. Therefore, PHICH resource allocation is performed using the cyclic shift value of the DMRS actually used in the second subframe. This may be considered as a way to enable multiplexing of PHICH resources for two transport blocks transmitted in two subframes at one time.
  • a downlink control channel PDCCH / EPDCCH for allocating a scheduling grant for enabling the UE to enable uplink PUSCH transmission in each subframe can be reduced.
  • the overhead of downlink control channel PDCCH can be reduced by reducing the allocation of PHICH resources that can be generated according to uplink PUSCH transmission that can be transmitted for each subframe.
  • uplink between antennas / layers is used for uplink PUSCH transmission using multiple layers using multiple antennas.
  • OCC orthogonal cover code
  • the downlink channel includes a downlink control channel, and the downlink control channel includes a PDCCH or an EPDCCH.
  • FIG. 7 is a diagram illustrating a process of operating a terminal according to an embodiment of the present invention.
  • the operation of the terminal is as follows. First, the terminal receives a downlink channel including the indication information necessary for transmitting the reference signal from the base station (S710). The terminal generates a reference signal according to the indication information (S720). Thereafter, the UE transmits an uplink channel by including a reference signal in N slots of consecutive 2N slots, where N is a natural number of 1 or more, and the indication information explicitly or implicitly indicates multi-TTI or multi-subframe scheduling. Instructed (S730).
  • the UE may check the indication information included in 1 bit of the DCI format in S720, and when a part of the indication information is included in the RRC parameter in more detail, the UE When the indication information is confirmed in the 1 bit, the number of subframes for multi-TTI or multi-subframe scheduling may be confirmed in the RRC parameter included in the downlink channel.
  • the base station transmits the indication information in an implicit indication method, when the frequency hopping in the uplink channel is deactivated, the terminal may check the indication information in the frequency hopping flag.
  • the UE includes the remaining code point in the DCI format. The indicated indication information can be confirmed.
  • the UE may check the indication information included in the cyclic shift field on the DCI format, and further, by using a value calculated by performing a modulo operation on the C-RNTI of the UE as 2N. The indication information can be confirmed.
  • PH730 resource allocation in uplink channel transmission of S730 when a transport block is configured in subframe units in a state in which a scheduling grant of all subframes is used, the UE is used in the consecutive 2M subframes (M is one or more natural numbers).
  • a reference signal may be generated and transmitted so that the cyclic shift values of the DMRSs are different.
  • the base station generates a downlink channel including the indication information necessary for transmitting the reference signal (S810).
  • the generated downlink channel is transmitted to the terminal (S820), and then, after receiving the uplink channel transmitted by the terminal, the reference signal is used by using a reference signal of a slot including a reference signal in the uplink channel transmitted by the terminal. Demodulate the signal of the slot not included (S830).
  • the terminal transmits an uplink channel by including a reference signal in N slots of consecutive 2N slots, where N is a natural number of 1 or more, and the indication information explicitly or implicitly indicates multi-TTI or multi-subframe scheduling. It is characterized by the instructions.
  • the base station when the base station generates the downlink channel may include the indication information in 1bit of the DCI format, and in more detail to include a part of the indication information in the RRC parameters, the base station is assigned to the DCI
  • the 1-bit indication information may be included and the downlink channel may include an RRC parameter indicating the number of subframes for multi-TTI or multi-subframe scheduling.
  • the base station transmits the indication information in an implicit indication manner, the base station may include the indication information in a frequency hopping flag when frequency hopping in the uplink channel is deactivated.
  • the indication information may be included in the remaining code point of.
  • the base station may set the cyclic shift value corresponding to the indication information as a cyclic shift field in the DCI format, and also performs a modulo operation on the C-RNTI of the terminal as the 2N.
  • the C-RNTI value may be set to indicate the indication information.
  • the MS is used in the consecutive 2M subframes (M is one or more natural numbers).
  • M is one or more natural numbers.
  • the cyclic shift values of the DMRSs may be different.
  • the base station may use a reference signal included in an adjacent slot to demodulate an uplink channel transmitted in a slot that does not include a reference signal in demodulation of the subframe. have.
  • FIG. 9 is a diagram illustrating a configuration of a user terminal according to another embodiment.
  • a user terminal 900 includes a receiver 930, a controller 910, and a transmitter 920.
  • the receiver 930 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • control unit 910 uses the multiple antennas in the case of applying the multi-TTI and the multi-subframe scheduling required to carry out the present invention to a small cell environment and any cell / base station / RRH / antenna / RU Operation of the overall UE according to applying an orthogonal cover code (OCC) having a length-2 of 2 to maintain orthogonality of uplink reference signals between antennas / layers for uplink PUSCH transmission using a layer To control.
  • OCC orthogonal cover code
  • the transmitter 920 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • the receiver 930 receives a downlink channel including indication information necessary for transmitting a reference signal from a base station, and the controller 910 generates a reference signal according to the indication information.
  • the transmitter 920 transmits an uplink channel by including a reference signal in N slots of consecutive 2N slots, where N is a natural number of 1 or more and the indication information explicitly indicates multi-TTI or multi-subframe scheduling. Or implicitly.
  • the controller 910 may check the indication information included in 1 bit of the DCI format when generating the reference signal, and if the indication information is confirmed in more detail in the 1 bit, the control unit 910 may include an RRC parameter included in the downlink channel. The number of subframes for multiple TTI or multiple subframe scheduling can be checked.
  • the controller 910 may check the indication information in a frequency hopping flag when frequency hopping in the uplink channel is deactivated.
  • the indication information is included in a remaining code point of the DCI format, or is included in a cyclic shift field on the DCI format, or a module for C-RNTI of the terminal. It may be included in the value calculated by performing the operation with the 2N.
  • the control unit 910 determines that the cyclic shift value of DMRSs used in the consecutive 2M subframes (M is one or more natural numbers) Reference signals may be generated to be different.
  • FIG. 10 is a diagram illustrating a configuration of a base station according to another embodiment.
  • the base station 1000 includes a controller 1010, a transmitter 1020, and a receiver 1030.
  • the control unit 1010 uses a multi-layer using a multi-antenna in the case of applying the multi-TTI, multi-subframe scheduling required to carry out the present invention to a small cell environment and any cell / base station / RRH / antenna / RU
  • OCC orthogonal cover code
  • the transmitter 1020 and the receiver 1030 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.
  • the controller 1010 generates a downlink channel including the indication information necessary for transmitting the reference signal, and the transmitter 1020 transmits the generated downlink channel to the terminal.
  • the terminal transmits an uplink channel by including a reference signal in N slots of consecutive 2N slots.
  • N is a natural number of 1 or more and the indication information may explicitly or implicitly indicate multi-TTI or multi-subframe scheduling.
  • the controller 1010 may include the indication information in 1 bit of DCI format for explicit signaling, and also include 1 bit of indication information in the DCI and schedule multiple TTIs or multiple subframes in the downlink channel.
  • An RRC parameter indicating the number of subframes for may be included.
  • the controller 1010 may include the indication information in a frequency hopping flag when frequency hopping in the uplink channel is deactivated.
  • the controller 1010 may include the indication information in the remaining code point of the DCI format, or in the cyclic shift field on the DCI format, or modulo operation to the 2N for the C-RNTI of the terminal. It can be included in the calculated value.
  • DMRSs used in the consecutive 2M subframes may be different, which may instruct the controller 1010 to set cyclic shift values of different DMRSs when generating a downlink channel.
  • the controller 1010 does not include a reference signal using a reference signal of a slot including a reference signal in the received uplink channel. The signal of the slot can be demodulated.
  • the present invention discussed so far provides multi-TI and multi-subframe scheduling in a small cell environment or an arbitrary cell / base station / RRH / antenna / RU in order to transmit uplink PUSCH using multiple layers using multiple antennas.
  • OCC orthogonal cover code

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

Abstract

Un procédé par lequel un terminal émet un signal de référence de liaison montante, selon un mode de réalisation de la présente invention, comprend les étapes consistant à : recevoir par le terminal, en provenance d'une station de base, un canal de liaison descendante comprenant des informations d'indication requises pour l'émission d'un signal de référence ; générer le signal de référence conformément aux informations d'indication ; et émettre un canal de liaison montante par insertion du signal de référence dans N créneaux parmi 2N créneaux consécutifs, N étant un entier naturel supérieur ou égal à 1, et les informations d'indication indiquant clairement ou implicitement une planification de multiples intervalles de temps de transmission (TTI) ou de multiples sous-trames.
PCT/KR2014/002451 2013-03-28 2014-03-24 Procédé d'émission et de réception de signal de référence de liaison montante et dispositif correspondant WO2014157890A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20130033856 2013-03-28
KR10-2013-0033856 2013-03-28
KR1020130117231A KR20140118678A (ko) 2013-03-28 2013-10-01 상향링크 참조신호를 송수신하는 방법 및 그 장치
KR10-2013-0117231 2013-10-01

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180040021A (ko) * 2016-10-11 2018-04-19 에스케이텔레콤 주식회사 신호수신장치

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090046605A1 (en) * 2007-08-14 2009-02-19 Adele Gao Uplink scheduling grant for time division duplex with asymmetric uplink and downlink configuration
US20090175232A1 (en) * 2008-01-08 2009-07-09 Nokia Siemens Networks Oy Joint Coding of Multiple TTI Information and Quality Indication Requests
WO2011142625A2 (fr) * 2010-05-13 2011-11-17 엘지전자 주식회사 Procédé et appareil de génération d'une séquence de signal de référence dans un système de communication sans fil
WO2013024987A2 (fr) * 2011-08-12 2013-02-21 주식회사 팬택 Procédé de commande d'émission srs au niveau d'une extrémité d'émission, extrémité d'émission associée, procédé d'émission srs d'un terminal et terminal associé

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090046605A1 (en) * 2007-08-14 2009-02-19 Adele Gao Uplink scheduling grant for time division duplex with asymmetric uplink and downlink configuration
US20090175232A1 (en) * 2008-01-08 2009-07-09 Nokia Siemens Networks Oy Joint Coding of Multiple TTI Information and Quality Indication Requests
WO2011142625A2 (fr) * 2010-05-13 2011-11-17 엘지전자 주식회사 Procédé et appareil de génération d'une séquence de signal de référence dans un système de communication sans fil
WO2013024987A2 (fr) * 2011-08-12 2013-02-21 주식회사 팬택 Procédé de commande d'émission srs au niveau d'une extrémité d'émission, extrémité d'émission associée, procédé d'émission srs d'un terminal et terminal associé

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
NTT DOCOMO: "PDCCH Enhancement for Different TDD UL-DL Configuration on Different Bands", R1-121464, 3GPP TSG RAN WG1 MEETING #68BIS, 26 March 2012 (2012-03-26), JEJU, KOREA, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_68b/Docs/R1-121464.zip> *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180040021A (ko) * 2016-10-11 2018-04-19 에스케이텔레콤 주식회사 신호수신장치
KR102525746B1 (ko) * 2016-10-11 2023-04-25 에스케이텔레콤 주식회사 신호수신장치

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