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WO2017171259A1 - Procédé pour établir un canal de données de liaison montante sur la base d'un signal de référence de démodulation partagé, et dispositif associé - Google Patents

Procédé pour établir un canal de données de liaison montante sur la base d'un signal de référence de démodulation partagé, et dispositif associé Download PDF

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Publication number
WO2017171259A1
WO2017171259A1 PCT/KR2017/002536 KR2017002536W WO2017171259A1 WO 2017171259 A1 WO2017171259 A1 WO 2017171259A1 KR 2017002536 W KR2017002536 W KR 2017002536W WO 2017171259 A1 WO2017171259 A1 WO 2017171259A1
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WO
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Prior art keywords
shared
short tti
location
symbol
spusch
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PCT/KR2017/002536
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English (en)
Korean (ko)
Inventor
김기태
최우진
Original Assignee
주식회사 케이티
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020170022964A external-priority patent/KR102065432B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to CN201780013601.8A priority Critical patent/CN108702280B/zh
Priority to US16/088,914 priority patent/US10892867B2/en
Publication of WO2017171259A1 publication Critical patent/WO2017171259A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present embodiments relate to a method for configuring short TTI based sPUSCH in 3GPP LTE / LTE-Advanced system.
  • Latency reduction is to standardize shorter TTI (hereinafter referred to as 'short TTI' or 'sTTI') operation to improve TCP throughput.
  • RAN2 performs performance verification on short TTI, and discussions on the feasibility and performance of TTI length between 0.5ms and one OFDM symbol, and maintaining backward compatibility are ongoing.
  • An object of the present embodiments is to provide a specific configuration method of short TTI for sPUSCH and a specific operation method of shared DM-RS based sPUSCH in 3GPP LTE / LTE-Advanced system.
  • the embodiments of the present invention provide a method for establishing a shared demodulation reference signal-based uplink data channel of a terminal, comprising: configuring a short TTI-based sPUSCH in one subframe, and a plurality of shorts included in one subframe It provides a method comprising the step of setting a shared DM-RS in the symbols included in some short TTI of the TTI, and transmitting the sPUSCH to the base station.
  • a method of establishing a base station based on a shared demodulation reference signal of a base station comprising: transmitting configuration information about a location of a short TTI including a shared DM-RS and a location within a short TTI of a shared DM-RS to a terminal; And receiving the shared DM-RS and the short TTI set in a symbol included in some short TTIs of a plurality of short TTIs included in one subframe.
  • a terminal for configuring a shared demodulation reference signal-based uplink data channel comprising: configuring a short TTI based sPUSCH in one subframe and sharing a DM in a symbol included in some short TTIs among a plurality of short TTIs included in one subframe
  • a terminal including a control unit for setting -RS and a transmitter for transmitting an sPUSCH to a base station.
  • a base station for setting a shared demodulation reference signal-based uplink data channel comprising: a control unit for generating configuration information about a location of a short TTI including a shared DM-RS and a location within a short TTI of a shared DM-RS;
  • a base station includes a transmitter for transmitting to a terminal and a receiver for receiving a shared DM-RS and a short TTI set in a symbol included in some short TTIs of a plurality of short TTIs included in one subframe from a terminal.
  • a specific scheme for short TTI based sPUSCH configuration and a specific scheme for shared DM-RS configuration are provided, and the method is not limited to a new frame structure, and the principle is applied to similar signals and channels. It can be applied as is.
  • 1 is a diagram illustrating eNB and UE processing delays and HARQ RTT.
  • 2 is a diagram illustrating resource mapping per PRB in one subframe.
  • FIG. 3 is a diagram illustrating various sTTI configuration candidates for sPUSCHs compared to conventional TTIs.
  • FIG. 4 is a diagram illustrating an example of sharing DM-RS allocation of 'Method 1'.
  • 5 is a diagram illustrating the concept of shared DM-RS allocation according to 'Method 1-1'.
  • FIG. 6 is a diagram illustrating a DM-RS overlapping method (FDM based) according to 'Method 1-2'.
  • FIG. 7 is a view showing a DM-RS overlapping method (CDM based) according to 'Method 1-2'.
  • FIG. 8 is a diagram illustrating an example of setting an sTTI region according to 'Method 2'.
  • FIG. 9 is a diagram illustrating a process of a shared DM-RS based sPUSCH configuration method in an sTTI frame structure of a terminal according to the present embodiments.
  • FIG. 10 is a diagram illustrating a process of a shared DM-RS based sPUSCH configuration method in an sTTI frame structure of a base station according to the present embodiments.
  • FIG. 11 is a diagram illustrating a configuration of a base station according to another embodiment.
  • FIG. 12 is a diagram illustrating a configuration of a terminal according to another embodiment.
  • the MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement.
  • the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.
  • the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations.
  • the MTC terminal supports enhanced coverage compared to the existing LTE coverage, or supports UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or lower power consumption).
  • low complexity can mean UE category / type.
  • 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 generic concept meaning a terminal in wireless communication.
  • user equipment (UE) in WCDMA, LTE, and HSPA, as well as mobile station (MS) in GSM, user terminal (UT), and SS It should be interpreted as a concept that includes a subscriber station, a wireless device, and the like.
  • 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.
  • Other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and a small cell may be called.
  • RRH remote radio head
  • RU radio unit
  • a base station or a cell is a generic meaning indicating 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 should be interpreted as, and it is meant to cover all the various coverage areas such as megacell, macrocell, microcell, picocell, femtocell and relay node, RRH, RU, small cell 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 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
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), a Physical Uplink Control CHannel (PUCCH), an Enhanced Physical Downlink Control CHannel (EPDCCH), and the like.
  • Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • control information may also be transmitted using an enhanced PDCCH (EPDCCH or extended PDCCH).
  • EPDCCH enhanced PDCCH
  • extended PDCCH 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, an EPDCCH, and a PDSCH may be expressed in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, an EPDCCH, and a PDSCH.
  • a description of transmitting or receiving a PDCCH or transmitting or receiving a signal through the PDCCH may be used as a meaning including transmitting or receiving an EPDCCH or transmitting or receiving a signal through the EPDCCH.
  • the physical downlink control channel described below may mean PDCCH or EPDCCH, and may also be used to include both PDCCH and EPDCCH.
  • the EPDCCH which is an embodiment of the present invention, may be applied to the portion described as the PDCCH, and the PDCCH may be applied to the portion described as the EPDCCH as an embodiment of the present invention.
  • high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.
  • the eNB performs downlink transmission to the 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
  • Latency reduction Study Items were approved at the RAN plenary # 69 meeting [1].
  • the main purpose of latency reduction is to standardize shorter TTI operations to improve TCP throughput [2].
  • RAN2 has already performed performance verification on short TTI [2].
  • Latency reduction can be achieved by the following physical layer techniques:
  • PDCCH and legacy PDSCH are used for scheduling
  • O UE is expected to receive a sPDSCH at least for downlink unicast
  • ⁇ sPDSCH refers PDSCH carrying data in a short TTI
  • O UE is expected to receive PDSCH for downlink unicast
  • O FFS The number of supported short TTIs
  • existing non-sTTI and sTTI can be FDMed in the same subframe in the same carrier
  • FFS Other multiplexing method (s) with existing non-sTTI for UE supporting latency reduction features
  • the LTE U-plane one-way latency for a scheduled UE consists of the fixed node processing delays and 1 TTI duration for transmission, as shown in Figure 1 below. Assuming the processing times can be scaled by the same factor of TTI reduction keeping the same number of HARQ processes, the one way latency can be calculated as
  • steps 1-4 and half delay of step 5 is assumed to be due to SR, and rest is assumed for UL data transmission in values shown in Table 4
  • the resource map above is the legacy resource mapping per PRB in one subframe, considering 2 Antenna ports and 2 OFDM symbols control field.
  • the resource map below is the short TTI resource mapping, considering 2 OFDM symbols used for the control field in order to ensure the backward compatibility.
  • the loss rates (L legacy , eg 5%-50%) of the PHY layer in short TTI duration are assumed.
  • the loss rate of PHY layer for legacy PDSCH is calculated as follows:
  • the TBS of short TTI PDSCH is calculated as the following table 2 (TBS calculation for different TTI duration):
  • the present invention proposes an sTTI configuration method for a short TTI based PUSCH (sPUSCH) and a specific operation method of a shared DM-RS based sPUSCH.
  • a short TTI may be composed of a set of 1, 2, 3, 4, and 7 symbols.
  • sTTI structures as shown in FIG. 3 may be discussed.
  • all resource elements (REs) of DM-RS symbols in a resource block (RB) are allocated for channel estimation purposes.
  • the overhead may be greatly increased when the sTTI configuration for the sPUSCH is reused by reusing the existing PUSCH structure. Therefore, a sharing RS structure is currently considered as an alternative in DM-RS for sPUSCH.
  • the sPUSCH is defined to define a shared DM-RS symbol only for some sTTIs in the sTTI.
  • only some sTTIs include a DM-RS symbol.
  • a DM-RS symbol may be included only in sTTI0 in sTTI0 and sTTI1
  • a DM-RS symbol may be included in only sTTI2 in sTTI2 and sTTI3.
  • the RS overhead may be relatively larger than the DL sTTI.
  • the overhead can be reduced by applying a shared DM-RS, and the proposed scheme can be one method of reducing the UL DM-RS overhead.
  • Option 1-1 Only the first sTTI in the Legacy TTI sets the DM-RS symbol.
  • FIG. 5 illustrates the concept of shared DM-RS allocation according to 'Method 1-1'.
  • the UE may set the shared DM-RS location and the included sTTI location in the sTTI.
  • each UE may transmit its own sTTI and DM-RS, respectively.
  • the DM-RS when performing additional power-boosting for the DM-RS in the sTTI, it is advantageous to place the DM-RS first in the symbol. This is because time-delay may occur when the power is momentarily increased in the power-amplifier of the terminal. However, if the DM-RS is located at the first symbol in the sTTI, the power reduction for subsequent data symbols can minimize distortion because the delay is relatively short. However, this proposal does not restrict the symbol DM-RS to a specific position.
  • the DM-RS sharing structure of 'Method 1' is inherited as it is, but an additional multiplexing approach is required in the DM-RS sharing structure.
  • the multiplexing of the DM-RS may be FDM or CDM.
  • FIG. 6 shows multiplexing of DM-RS by FDM method
  • FIG. 7 shows multiplexing of DM-RS by CDM method.
  • CDMs are transmitted to all REs in a symbol, but because they are not orthogonal to each other, mutual interference occurs.
  • the present proposal proposes an sTTI configuration method for dividing an sPUSCH region that can be independently allocated to specific terminals and an region that can independently use multiple users.
  • Option 2-1 Single UE for sPUSCH In the settings area the same DM- RS Use the same port in legacy TTI.
  • Option 2-2 Multiple UE for sPUSCH In the settings area, the shared DM- RS Symbol Based on the pre-determined sTTI paring dependent on the DM-RS port.
  • the sTTI-based sPUSCH configuration method and a specific method for configuring the shared DM-RS are described.
  • the method can be applied to the similar signals and channels as it is, and the application thereof is not limited only to the new frame structure. Do not.
  • FIG. 9 illustrates a process of a shared DM-RS based sPUSCH configuration method in an sTTI frame structure of a terminal according to the present embodiments.
  • the UE configures an sTTI-based sPUSCH (S900) and configures a shared DM-RS in some sTTIs among a plurality of sTTIs included in one subframe (S910).
  • the UE may configure a shared DM-RS only for a symbol included in any one sTTI among a plurality of sTTIs included in one subframe.
  • the terminal may set the shared DM-RS in the first symbol among the symbols included in the sTTI in setting the shared DM-RS in the symbols included in some sTTI.
  • the terminal may configure the shared DM-RS by applying a multiplexing concept.
  • the terminal may set a frequency division modulation (FDM) or code division modulation (CDM) of a symbol in which the shared DM-RS is configured, and set a DM-RS of a single terminal that transmits a DM-RS or multiple layers of multiple users.
  • FDM frequency division modulation
  • CDM code division modulation
  • the terminal may divide the sPUSCH region into a region for a single terminal and a region for a plurality of terminals, and may set a shared DM-RS independently in each sPUSCH region.
  • the shared DM-RS set in the sPUSCH region for a single terminal is set in the same manner as in the above-described 'Method 1-1', and the shared DM-RS set in the sPUSCH region for the multiple terminals is the above-mentioned 'Method 1 Can be set in the same way as -2 '.
  • Such a terminal may receive configuration information regarding the location of the sTTI including the shared DM-RS and the location within the sTTI of the shared DM-RS from the base station, and configure the shared DM-RS according to the received configuration information.
  • the terminal may determine the location of the sTTI including the shared DM-RS or dynamically set the location of the shared DM-RS in the sTTI according to a predefined pattern.
  • the terminal transmits the sTTI in which the shared DM-RS is set and the sTTI in which the shared DM-RS is not set to the base station (S920).
  • FIG. 10 illustrates a process of a shared DM-RS based sPUSCH configuration method in an sTTI frame structure of a base station according to the present embodiments.
  • the base station according to the present exemplary embodiments generates configuration information regarding the location of the sTTI including the shared DM-RS and the location within the sTTI of the shared DM-RS in the sTTI frame structure (S1000). Send to the terminal (S1010).
  • the base station enables the terminal to configure a shared DM-RS in symbols included in some sTTIs in the sTTI frame structure according to the configuration information.
  • the base station may allow the terminal to set the shared DM-RS in the sTTI frame structure according to a predefined pattern, and may also be configured to dynamically set the shared DM-RS.
  • the base station receives together the sTTI including the shared DM-RS and the sTTI not including the shared DM-RS from the terminal (S1020).
  • FIG. 11 is a diagram illustrating a configuration of a terminal 1100 according to another embodiment.
  • the terminal 1100 includes a receiver 1110, a controller 1120, and a transmitter 1130.
  • the receiver 1110 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • controller 1120 controls the sTTI configuration for the short TTI based PUSCH (sPUSCH) and the overall operation of the terminal 1100 required to specifically operate the shared DM-RS based sPUSCH according to the present invention.
  • the transmitter 1130 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • FIG. 12 is a diagram illustrating a configuration of a base station 1200 according to another embodiment.
  • the base station 1200 includes a controller 1210, a transmitter 1220, and a receiver 1230.
  • the controller 1210 controls the sTTI configuration for the short TTI based PUSCH (sPUSCH) and the overall operation of the base station 1200 required to specifically operate the shared DM-RS based sPUSCH according to the above-described present invention.
  • the transmitter 1220 and the receiver 1230 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.

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

Abstract

Conformément à des modes de réalisation, la présente invention concerne un procédé de réglage d'intervalle de temps de transmission court (sTTI) pour un sPUSCH dans une structure de trame de TTI courte et un procédé de fonctionnement spécifique pour un sPUSCH basé sur un signal de référence de démodulation (DM-RS) partagé et concerne, en particulier, un procédé au moyen duquel un DM-RS partagé dans un sPUSCH est attribué uniquement à un symbole spécifique compris dans un sTTI partiel et est utilisé dans tous les sPUSCH dans un TTI traditionnel (=1 ms).
PCT/KR2017/002536 2016-03-28 2017-03-08 Procédé pour établir un canal de données de liaison montante sur la base d'un signal de référence de démodulation partagé, et dispositif associé WO2017171259A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201780013601.8A CN108702280B (zh) 2016-03-28 2017-03-08 基于共享的解调参考信号来建立上行链路数据信道的方法及其装置
US16/088,914 US10892867B2 (en) 2016-03-28 2017-03-08 Method for establishing uplink data channel on basis of shared demodulation reference signal, and device therefor

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2016-0037224 2016-03-28
KR20160037224 2016-03-28
KR1020170022964A KR102065432B1 (ko) 2016-03-28 2017-02-21 공유 복조 기준 신호 기반 상향링크 데이터 채널 설정 방법 및 그 장치
KR10-2017-0022964 2017-02-21

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Publication number Priority date Publication date Assignee Title
CN111133716A (zh) * 2018-04-27 2020-05-08 Lg电子株式会社 发送和接收参考信号的方法及其设备
CN111133716B (zh) * 2018-04-27 2022-05-27 Lg电子株式会社 发送和接收参考信号的方法及其设备
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