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WO2017192014A2 - Procédé et appareil de transmission et de réception d'informations de commande et de données dans une structure de trame d'un intervalle de temps de transmission court - Google Patents

Procédé et appareil de transmission et de réception d'informations de commande et de données dans une structure de trame d'un intervalle de temps de transmission court Download PDF

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Publication number
WO2017192014A2
WO2017192014A2 PCT/KR2017/004702 KR2017004702W WO2017192014A2 WO 2017192014 A2 WO2017192014 A2 WO 2017192014A2 KR 2017004702 W KR2017004702 W KR 2017004702W WO 2017192014 A2 WO2017192014 A2 WO 2017192014A2
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WIPO (PCT)
Prior art keywords
time interval
transmission time
aggregation level
search space
control channel
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PCT/KR2017/004702
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English (en)
Korean (ko)
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WO2017192014A3 (fr
Inventor
김기태
최우진
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KT Corp
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KT Corp
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Priority to CN201780027159.4A priority Critical patent/CN109075949B/zh
Priority to US16/098,812 priority patent/US11431460B2/en
Priority claimed from KR1020170056011A external-priority patent/KR102093906B1/ko
Priority claimed from KR1020170056206A external-priority patent/KR102120976B1/ko
Publication of WO2017192014A2 publication Critical patent/WO2017192014A2/fr
Publication of WO2017192014A3 publication Critical patent/WO2017192014A3/fr
Priority to US16/179,863 priority patent/US11431461B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]

Definitions

  • the present embodiments relate to the operation of a terminal and a base station for transmitting and receiving control information and data in a 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 method for the search space configuration and blind decoding of the sPDCCH and legacy PDCCH in a short TTI frame structure.
  • an object of the present embodiment the transmission and reception method of the uplink control channel and the uplink data channel in the short TTI-based frame structure and the specific operation of the terminal and the base station when the simultaneous transmission of the uplink data channel and sounding reference signal To provide.
  • the present invention provides a method for detecting downlink control information in a frame structure of a short transmission time interval, the method comprising: receiving a downlink control channel of a first transmission time interval set to a first aggregation level; Receiving a downlink control channel of a second transmission time interval set to a second aggregation level, and performing blind decoding based on the first aggregation level and the second aggregation level;
  • the two aggregation levels provide a separate method from each other.
  • embodiments of the present invention provide a method for a user equipment to transmit an uplink channel in a frame structure of a short transmission time interval, the method comprising: receiving downlink data from a base station through a downlink data channel having a short transmission time interval; Transmitting an Ack / Nack for downlink data to the base station through an uplink control channel having a short transmission time interval; and uplink data and a sounding reference signal through an uplink data channel having a short transmission time interval to the base station. And transmitting at least one of uplink data and sounding reference signals through at least one of uplink data channels of short transmission time intervals included in one subframe.
  • embodiments of the present invention provide a method for a user equipment to transmit an uplink channel in a frame structure of a short transmission time interval, the method comprising: receiving downlink data from a base station through a downlink data channel having a short transmission time interval; Configuring an uplink control channel of short transmission time intervals including Ack / Nack by assigning individual cyclic shift values to Ack / Nack, and downlink data through an uplink control channel of short transmission time intervals It provides a method comprising the step of transmitting the Ack / Nack for the base station.
  • a specific scheme for configuring a search space for transmitting and receiving downlink control information (DCI) in a short TTI frame structure is provided.
  • a specific scheme for sPUCCH configuration and transmission and reception in a short TTI-based frame structure and an uplink channel transmission / reception scheme for solving an overlap problem between sPUSCH and SRS symbol intervals are provided.
  • 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 conceptual diagram illustrating a search space definition.
  • FIG. 4 is a conceptual diagram illustrating a common search space definition.
  • 5 is a conceptual diagram illustrating UE-specific search space definition.
  • FIG. 6 is a diagram illustrating a conceptual search space separation scheme 1-1 for sTTI according to the present embodiments.
  • FIG. 7 is a diagram illustrating a conceptual diagram of search space separation (Method 1-3) for sTTI according to the present embodiments.
  • FIG. 8 is a diagram illustrating a search space based CCE indexing method according to a method 1-4-1 when separating search spaces according to the present embodiments.
  • FIG. 9 is a diagram illustrating a search space based CCE indexing method according to a method 1-4-2 when separating search spaces according to the present embodiments.
  • FIG. 10 is a diagram illustrating a search space based CCE indexing method according to a method 1-4-3 when separating search spaces according to the present embodiments.
  • 11 and 12 illustrate a process of a method for detecting DCI in an sTTI frame structure according to the embodiments.
  • FIG. 13 is a diagram illustrating an example of an uplink channel transmission scheme in an sTTI based frame structure.
  • FIG. 14 is a diagram illustrating a transmission conceptual diagram of sPUSCH and SRS.
  • 16 is a conceptual diagram illustrating SRS protection through sPUSCH drop.
  • 17 is a conceptual diagram illustrating sTTI bundling.
  • FIG. 18 is a diagram illustrating a configuration of a base station according to the present embodiments.
  • FIG. 19 illustrates a configuration of a user terminal according to the present embodiments.
  • 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 interpreted in a comprehensive sense to indicate some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB 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, 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, transmission / reception points, transmission points, and reception points are collectively referred to as base stations. do.
  • LPNs low power nodes
  • 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
  • UMB Universal Mobile Broadband
  • 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 high transmission power or a low transmission power in a macro cell region, which is connected to an eNB or a macro cell (hereinafter referred to as an 'eNB') and wired controlled by an optical cable or an optical fiber to an 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 described 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
  • ⁇ sPDCCH (PDCCH for short TTI) needs to be introduced for short TTI.
  • each short TTI on DL may contain sPDCCH decoding candidates
  • any DCI for sTTI scheduling carried on PDCCH may be taken into account in the maximum total number of BDs
  • Two-level DCI can be studied for sTTI scheduling, whereby:
  • -DCI for sTTI scheduling can be divided into two types:
  • the scheduling information is obtained from either:
  • a combination of slow DCI and fast DCI or
  • the slow DCI also includes some resource allocation information for the sPDCCH.
  • FFS the number of DMRS antenna ports that can be supported for a given short-TTI length.
  • a UE is expected to handle the following cases in the same carrier in a subframe
  • Alt 1 A UE is not expected to receive legacy TTI unicast PDSCH and short TTI unicast PDSCH simultaneously on one carrier
  • Alt 3 A UE is expected to receive legacy TTI unicast PDSCH and short TTI unicast PDSCH simultaneously on one carrier
  • a UE can be dynamically (with a subframe to subframe granularity) scheduled with legacy TTI unicast PDSCH and / or (depends on outcome of FFS above) short TTI PDSCH unicast
  • a UE can be dynamically (with a subframe to subframe granularity) scheduled with PUSCH and / or sPUSCH
  • a UE is not expected to transmit PUSCH and short TTI sPUSCH simultaneously on the same REs, i.e. by superposition
  • a UE may transmit PUSCH and short TTI sPUSCH in the same subframe on one carrier by puncturing PUSCH
  • FFS the extent of processing time reduction
  • FFS the extent of processing time reduction
  • 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
  • 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:
  • the present invention proposes a search space configuration and blind decoding scheme of sPDCCH and legacy PDCCH for short TTI frame.
  • PDCCH detection performs blind decoding based on a given hashing function based on the following aggregation level and PDCCH candidate.
  • FIG. 3 is a conceptual diagram of search space definition
  • FIG. 4 is a conceptual diagram of common search space definition
  • FIG. 5 is a conceptual diagram of UE-specific search space definition.
  • ⁇ size depends on the type and aggregation level of search space
  • ⁇ set of PDCCH candidates to monitor are defined in terms of search spaces
  • the following maximum blind decoding number is determined in order for the UE to find its own PDCCH based on the defined search space.
  • Two-level DCI currently considered in latency reduction can be divided into 'slow DCI' and 'fast DCI'.
  • Legacy On PDCCH Define a search space with a relatively large aggregation level
  • sPDCCH Allocate a search space with a relatively small aggregation level.
  • the blind decoding for the same aggregation level is not defined between the two search spaces.
  • the search space is separately defined in the legacy PDCCH region and the sPDCCH region in order to increase the maximum blind decoding to the minimum.
  • sTTI-based sPDCCH is expected to have relatively less available resources than legacy PDCCH, so that only aggregation level using relatively small resources is allowed for sPDCCH definition.
  • each search space can be applied flexibly through additional signaling during sTTI configuration. That is, if the set of aggregation level L of the UE-specific search space is lowered by signaling, the UE performs blind decoding on the aggregation level of the configured search space according to the configured method.
  • blind decoding is defined.
  • BD number BD X No. of sTTI in a subframe
  • Legacy PDCCH Define only common search space
  • sPDCCH Define only UE-specific search spaces.
  • defining the common search space to the sPDCCH may be an overhead, so only the common search space is defined in the legacy PDCCH, and all other UE-specific search spaces are defined in the sPDCCH. It means to define.
  • a hashing function may be defined as in the following equation.
  • BD number BD X No. of sTTI in a subframe
  • Aggregation level L ⁇ 1,2,4,8 ⁇
  • sPDCCH Define only minimum aggregation level, remaining search space legacy On PDCCH define.
  • the sTTI can operate in the lowest control overhead.
  • blind decoding is defined.
  • BD number BD X No. of sTTI in a subframe
  • a search space of legacy PDCCH and sPDCCH is configured separately so that each CCE index is independently provided.
  • FIG 9 shows an example of configuring a search space by connecting sPDCCH for each sTTI to the legacy PDCCH.
  • sPDCCH for each sTTI is connected to the legacy PDCCH to form a search space. Therefore, the CCE index of each sTTI sPDCCH is given following the CCE index of the legacy PDCCH.
  • FIG. 10 shows an example of configuring a search space by connecting an sPDCCH with an offset for each sTTI in the legacy PDCCH.
  • the CCE index of sPDCCH is legacy PDCCH, sPDCCH of sTTI # 0, sPDCCH of sTTI # 1, ..., sPDCCH of sTTI # N. It is given in the order of.
  • FIG. 11 is a flowchart illustrating a method of detecting a DCI in an sTTI frame structure according to the present embodiments, and illustrates a method of configuring a search space for a legacy PDCCH and an sPDCCH.
  • the base station sets a search space of the legacy PDCCH (S1100) and sets a search space of the sPDCCH (S1110).
  • the base station may be configured by separating the search space of the legacy PDCCH and sPDCCH.
  • the search space of legacy PDCCH and sPDCCH can be separated.
  • the search space of the legacy PDCCH may be configured as a common search space
  • the search space of the sPDCCH may be configured as a UE-specific search space.
  • the base station transmits the information on the aggregation level of the search space of the legacy PDCCH and the information on the aggregation level of the search space of the sPDCCH to the terminal (S1120), and may transmit information on the aggregation level through additional signaling at the time of sTTI configuration. .
  • FIG. 12 illustrates a process of a method of detecting a DCI in an sTTI frame structure according to the present embodiments, and illustrates a method in which a terminal performs blind decoding.
  • the terminal receives the legacy PDCCH and sPDCCH from the base station (S1200).
  • the terminal receives information on the aggregation level constituting the search space of the legacy PDCCH and the sPDCCH through the sTTI configuration information (S1210).
  • the search space of the legacy PDCCH may be configured at an aggregation level corresponding to the common search space, and the search space of the sPDCCH may receive search space information configured as a UE-specific search space.
  • the terminal checks the information on the search space received from the base station, that is, the information on the aggregation level defined in each PDCCH, and performs blind decoding on the basis of this (S1220).
  • the UE can perform blind decoding while reducing the complexity of blind decoding.
  • the present invention provides a terminal operation and a base station operation method for sPUCCH, sPUSCH (sPUSCH) and SRS transmission in a short TTI-based frame structure.
  • FIG. 13 shows a signal transmission and reception method between a terminal and a base station in a short TTI based frame structure.
  • the sTTI In a short TTI-based frame structure, the sTTI consists of two or three symbols.
  • the terminal receives the sTTI-based sPDSCH through the downlink data channel from the base station.
  • the UE Upon receiving the sPDSCH, the UE transmits the Ack / Nack for the received sPDSCH through the sTTI-based sPUCCH, and transmits uplink data and sounding reference signals through the sPUDSH.
  • the terminal configures an sPUCCH for transmitting Ack / Nack through an sTTI composed of two or three symbols.
  • the sPUCCH may be configured such that all symbols in the sPUCCH become data symbols including the Ack / Nack message without including RS in the sPUCCH structure.
  • the terminal may express the Ack / Nack message using two or more multi-CS resources.
  • two separate CS values are needed for the UE to express Ack or Nack, and two ACS values are allocated to each UE to configure the Ack / Nack message.
  • sPUCCH In sPUCCH, it is possible to assume that there are basically fewer terminals than the existing PUCCH, and not all terminals require latency reduction-based services, and thus sPUCCH may be configured by assigning two individual CS values to one terminal.
  • the UE may generate a simultaneous transmission period with a corresponding Sounding Reference Signal (SRS).
  • SRS Sounding Reference Signal
  • Alt 1 A UE is not expected to receive legacy TTI unicast PDSCH and short TTI unicast PDSCH simultaneously on one carrier
  • Alt 3 A UE is expected to receive legacy TTI unicast PDSCH and short TTI unicast PDSCH simultaneously on one carrier
  • FIG. 14 shows a conceptual diagram of transmission of sPUSCH and SRS
  • FIG. 15 shows a conceptual diagram of SRS and legacy PUSCH allocation.
  • FIG. 14 A transmission conceptual diagram illustrating the aforementioned sPUSCH and SRS transmission is illustrated in FIG. 14.
  • the existing SRS may be allocated to the last symbol of the uplink subframe.
  • the existing PUSCH and SRS applied the following method to solve this problem.
  • the PUSCH allocated to the region where the SRS overlaps should consider SRS and overlapping.
  • the transmission priority is given, so that the PUSCH adjusts the information size through multiplexing. That is, in the PUSCH where the symbols overlap with the SRS, data transmission is performed only in the region excluding the resources of the corresponding symbol period.
  • the sTTI is defined as two symbol intervals, except for one symbol interval overlapping the SRS, only the DMRS transmission symbol interval remains, and data transmission through the sPUSCH is impossible in the corresponding sTTI.
  • sTTI when sTTI is defined with three OFDM symbol intervals, only two symbols except for DMRS 1 symbol may transmit sPUSCH. In this case, if the SRS symbol interval excludes one symbol interval, sPUSCH is consequently in one symbol interval. Can be transmitted.
  • the present invention proposes the following method to solve the problem that may occur in the overlapping interval of the sPUSCH and SRS.
  • Option 2-1 Last in subframe sTTI Defined sPUSCH SRS Unconditionally overlaps with a resource sPUSCH Transfer drop . or sPUSCH Transfer skip .
  • 16 shows a conceptual diagram of SRS protection through sPUSCH drop.
  • the transmission of the sPUSCH in the corresponding sTTI is omitted.
  • the configuration for SRS transmission is predefined through RRC and SIB2, and the sTTI is configured in a semi-static manner.
  • the UE does not perform the corresponding data transmission even if the sPUSCH transmission is allocated through the corresponding sTTI.
  • the sPUSCH transmission in the sTTI may define the operation of the UE through the following method.
  • Subframe # 0 (sTTI # 0, sTTI # 1, ..., sTTI # N)
  • subframe # 1 sTTI # 0, sTTI # 1, ..., sTTI # N
  • Subframe # 0 (sTTI # 0, sTTI # 1, ..., sTTI # N)
  • subframe # 1 sTTI # 0, sTTI # 1, ..., sTTI # N
  • Option 2-2 Last in subframe sTTI Defined sPUSCH SRS When overlapping with resources, sPUSCH transmission based on shortened data is performed.
  • the same shortened sPUSCH in the sTTI performs transmission.
  • This method is applied in the same way as the existing SRS and legacy PUSCH is used when overlapping.
  • the UE also excludes the SRS overlap area when calculating the number of available REs.
  • sPUSCH transmission through the corresponding sTTI is omitted. Therefore, sPUSCH transmission is determined by considering the following criterion.
  • the sPUSCH When the SRS transmission interval and the resources of the sPUSCH overlap, the sPUSCH performs transmission regardless of the SRS configuration in the corresponding sTTI. In this case, since interference may be caused in the SRS symbol region, sPUSCH transmission is performed according to the following guide.
  • the UE omits its SRS transmission and transmits by mapping the sPUSCH in the symbol interval in all sTTIs.
  • the base station can know in advance that the SRS resource and the sPUSCH interval in the frequency domain overlap, and thus does not perform the SRS detection of the corresponding region, but performs the sPUSCH detection.
  • SPUSCH transmission is not performed because other terminals may perform SRS transmission in the SRS configuration region.
  • 17 shows a conceptual diagram of sTTI bundling.
  • sPUSCH transmission is basically performed by bundling with an adjacent sTTI.
  • the terminal since the base station knows whether the base station overlaps with the SRS symbol in advance, the terminal performs sTTI bundling according to a predetermined pattern in performing the corresponding sTTI transmission, and recalculates the available RE to perform data transmission.
  • FIG. 17 shows an example of sTTI # 3 and # 4 bundling to transmit sPUSCH # 3.
  • the following operation may be further defined.
  • the UE transmits the DMRS only in the preceding sTTI of the bundling target and performs data transmission through the sPUSCH to all the symbols except the SRS transmission symbol.
  • the base station knows the sTTI bundling-based transmission of the terminal in advance and performs sPUSCH detection using only the DMRS of the preceding sTTI.
  • the UE transmits the DMRS in all sTTIs to be bundled and performs data transmission through the sPUSCH to all the symbols except the SRS transmission symbol.
  • the base station knows the bundled sTTI bundling-based transmission of the UE in advance and performs sPUSCH detection using all the DMRSs located in each of the sTTIs.
  • sTTI at configuration SRS Transmission takes place subframe Defines sTTIs except the last symbol.
  • the sTTI when the sTTI is defined in a semi-static manner, if the SRS configuration is configured in the corresponding subframe, the sTTI is defined without any SRS symbol interval. In this case, since the SRS overlap issue is removed during sTTI configuration, this SRS overlap problem can be solved.
  • FIG. 18 illustrates a configuration of a base station 1800 according to the present embodiments.
  • the base station 1800 includes a controller 1810, a transmitter 1820, and a receiver 1830.
  • the controller 1810 controls the overall operation of the base station 1800 according to the above-described embodiments of the present invention by providing a search space configuration and a blind decoding scheme of the sPDCCH and the legacy PDCCH for the short TTI frame.
  • controller 1810 controls the overall operation of the base station 1800 according to the sPUCCH setting and transmission, sPUSCH and SRS transmission according to the above-described embodiments.
  • the transmitter 1820 and the receiver 1830 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.
  • FIG. 19 illustrates a configuration of a user terminal 1900 according to the present embodiments.
  • the user terminal 1900 includes a receiver 1910, a controller 1920, and a transmitter 1930.
  • the receiver 1910 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • the controller 1920 controls the overall operation of the user terminal 1900 according to the above-described embodiments of the present invention by providing a search space configuration and a blind decoding scheme of the sPDCCH and the legacy PDCCH for the short TTI frame.
  • controller 1920 controls the overall operation of the user terminal 1900 according to the sPUSCH setting and transmission, sPUSCH and SRS transmission according to the above-described embodiments.
  • the transmitter 1930 transmits uplink control information, data, and a message to a base station through a corresponding channel.

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

Abstract

Les modes de réalisation de la présente invention concernent un procédé de transmission et de réception d'informations de commande et de données entre un terminal et une station de base dans une structure de trame de TTI court. Dans un mode de réalisation, un espace de recherche d'un PDCCH patrimonial et un espace de recherche d'un sPDCCH sont séparés l'un de l'autre sur la base du type de l'espace de recherche ou d'un niveau d'agrégation, etc. et des informations sur l'espace de recherche séparé sont signalées au terminal, ce qui permet au terminal de détecter un DCI tout en réduisant la complexité d'un décodage aveugle.
PCT/KR2017/004702 2016-05-04 2017-05-02 Procédé et appareil de transmission et de réception d'informations de commande et de données dans une structure de trame d'un intervalle de temps de transmission court Ceased WO2017192014A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780027159.4A CN109075949B (zh) 2016-05-04 2017-05-02 发送和接收控制信息和数据的方法和装置
US16/098,812 US11431460B2 (en) 2016-05-04 2017-05-02 Method and apparatus for transmitting and receiving control information and data in frame structure of short transmission time interval
US16/179,863 US11431461B2 (en) 2016-05-04 2018-11-02 Method and apparatus for transmitting and receiving control information and data in frame structure of short transmission time interval

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
KR10-2016-0055676 2016-05-04
KR20160055676 2016-05-04
KR20160058317 2016-05-12
KR10-2016-0058317 2016-05-12
KR1020170056011A KR102093906B1 (ko) 2016-05-12 2017-05-02 짧은 전송 시간 간격의 프레임 구조에서 하향링크 제어 정보를 검출하는 방법 및 장치
KR1020170056206A KR102120976B1 (ko) 2016-05-04 2017-05-02 짧은 전송 시간 간격의 프레임 구조에서 상향링크 채널을 전송하는 방법 및 장치
KR10-2017-0056206 2017-05-02
KR10-2017-0056011 2017-05-02

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US16/098,812 A-371-Of-International US11431460B2 (en) 2016-05-04 2017-05-02 Method and apparatus for transmitting and receiving control information and data in frame structure of short transmission time interval
US16/179,863 Continuation US11431461B2 (en) 2016-05-04 2018-11-02 Method and apparatus for transmitting and receiving control information and data in frame structure of short transmission time interval

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110167153A (zh) * 2018-02-12 2019-08-23 维沃移动通信有限公司 一种下行控制信息dci的传输方法、装置及网络设备
WO2020017905A1 (fr) * 2018-07-20 2020-01-23 엘지전자 주식회사 Procédé de réception de signal de liaison descendante réalisé par un terminal dans un système de communication sans fil et terminal utilisant le procédé
WO2021020826A1 (fr) * 2019-07-26 2021-02-04 Samsung Electronics Co., Ltd. Procédé et dispositif de réception de canal de commande de liaison descendante physique
WO2021034086A1 (fr) * 2019-08-16 2021-02-25 엘지전자 주식회사 Procédé pour transmettre/recevoir des informations de commande de liaison descendante dans un système de communication sans fil, et dispositif associé

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014038813A1 (fr) * 2012-09-04 2014-03-13 Samsung Electronics Co., Ltd. Adaptation d'un nombre de niveaux d'agrégation pour des éléments de canal de contrôle
US20170070979A1 (en) * 2014-03-21 2017-03-09 Telefonaktiebolaget Lm Ericsson (Publ) Adaptive outer loop for physical downlink channel link adaptation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110167153A (zh) * 2018-02-12 2019-08-23 维沃移动通信有限公司 一种下行控制信息dci的传输方法、装置及网络设备
WO2020017905A1 (fr) * 2018-07-20 2020-01-23 엘지전자 주식회사 Procédé de réception de signal de liaison descendante réalisé par un terminal dans un système de communication sans fil et terminal utilisant le procédé
WO2021020826A1 (fr) * 2019-07-26 2021-02-04 Samsung Electronics Co., Ltd. Procédé et dispositif de réception de canal de commande de liaison descendante physique
US12267833B2 (en) 2019-07-26 2025-04-01 Samsung Electronics Co., Ltd Method and device for receiving physical downlink control channel
WO2021034086A1 (fr) * 2019-08-16 2021-02-25 엘지전자 주식회사 Procédé pour transmettre/recevoir des informations de commande de liaison descendante dans un système de communication sans fil, et dispositif associé
US12155599B2 (en) 2019-08-16 2024-11-26 Lg Electronics Inc. Method for transmitting/receiving downlink control information in wireless communication system and device therefor

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