WO2017160020A1 - Procédé et appareil de configuration d'une structure de trame et de transmission d'informations pendant un tti court - Google Patents

Procédé et appareil de configuration d'une structure de trame et de transmission d'informations pendant un tti court Download PDF

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Publication number
WO2017160020A1
WO2017160020A1 PCT/KR2017/002535 KR2017002535W WO2017160020A1 WO 2017160020 A1 WO2017160020 A1 WO 2017160020A1 KR 2017002535 W KR2017002535 W KR 2017002535W WO 2017160020 A1 WO2017160020 A1 WO 2017160020A1
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Prior art keywords
short tti
frame structure
symbols
tti
configuration information
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PCT/KR2017/002535
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English (en)
Korean (ko)
Inventor
김기태
최우진
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주식회사 케이티
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Priority claimed from KR1020170022956A external-priority patent/KR102237525B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Priority to US16/084,594 priority Critical patent/US11197309B2/en
Priority to CN201780017398.1A priority patent/CN108781154B/zh
Publication of WO2017160020A1 publication Critical patent/WO2017160020A1/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
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • 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
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058—Allocation criteria
    • H04L5/0073—Allocation arrangements that take into account other cell interferences
    • 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
    • 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
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/51—Allocation or scheduling criteria for wireless resources based on terminal or device properties
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/08—Upper layer protocols

Definitions

  • the present embodiments relate to a method for configuring a structure and transmitting configuration information of a short TTI frame 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 method for a base station to set a short TTI-based frame structure and a specific method for delivering information on the frame structure of the set short TTI to the terminal.
  • the terminal receiving the configuration information of the Short TTI is set to any number of symbols, the configuration information of the Short TTI And receiving data through a frame structure including a Short TTI set to a number of symbols based on the number of symbols.
  • the present embodiment in the method for the base station to transmit the Short TTI frame structure configuration information, the base station to set the number of arbitrary symbols to the Short TTI, and transmits the configuration information of the set Short TTI to the terminal And transmitting data through a frame structure including a Short TTI set to the number of arbitrary symbols.
  • a receiver for receiving the configuration information of the Short TTI set to the number of arbitrary symbols, and the receiver is based on the configuration information of the Short TTI
  • a terminal including a control unit for controlling to receive data through a frame structure including a short TTI set to the number of arbitrary symbols.
  • the present embodiment in the base station for transmitting the Short TTI frame structure configuration information, includes a control unit for setting the number of arbitrary symbols as a Short TTI, and a transmission unit for transmitting the configuration information of the set Short TTI to the terminal
  • the controller provides a base station for controlling the transmitter to transmit data through a frame structure including a Short TTI set to a number of symbols.
  • a method for establishing a short TTI based frame structure and a specific method for transmitting information on a set short TTI based frame structure The principle can be applied to the channel as it is.
  • 1 is a diagram for explaining eNB and UE processing delays and HARQ RTT.
  • 2 is a diagram for describing resource mapping per PRB in one subframe.
  • FIG. 3 is a diagram for explaining an example (from 1st symbol) of sTTI based frame setting according to ⁇ Method 1-1>.
  • FIG. 4 is a diagram for explaining an example of setting an sTTI-based frame (from Predefined N symbols to ex) 2nd symbols according to ⁇ Measure 1-2>.
  • FIG. 5 is a conceptual diagram illustrating sTTI scheduling according to ⁇ Method 1-3>.
  • FIG. 6 is a diagram for describing a method of delivering sTTI configuration information according to ⁇ Method 2>.
  • FIG. 7 is a diagram for describing a method of delivering sTTI configuration information according to ⁇ Method 3>.
  • FIG. 8 is a flowchart illustrating a method of receiving sTTI configuration information of a terminal according to the present embodiments.
  • FIG. 9 is a flowchart illustrating a method of transmitting sTTI configuration information by a base station according to the present embodiments.
  • FIG. 10 is a diagram illustrating a configuration of a terminal according to the present embodiments.
  • FIG. 11 is a diagram illustrating a configuration of a base station 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 supporting low cost (or low complexity) and 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 referred to.
  • 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, 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
  • 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 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.
  • the main purpose of latency reduction is to standardize shorter TTI operations to improve TCP throughput.
  • RAN2 has already performed performance verification on short TTI.
  • 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
  • 1 is a diagram for explaining eNB and UE processing delays and HARQ RTT.
  • 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.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
  • Step Description Delay One. Average delay to next SR opportunity SR periodicity / 2 2.
  • UE sends SR 1 TTI 3.
  • eNB decodes SR and generates scheduling grant 3 TTI 4. Transmission of scheduling grant (assumed always error free) 1 TTI 5.
  • UE processing delay decoding Scheduling grant + L1 encoding of data
  • UE sends UL transmission (1 + p * 8) TTI where p is initial BLER. 7.
  • eNB receives and decodes the UL data 1.5 TTI
  • 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
  • 2 is a diagram for describing resource mapping per PRB in one subframe.
  • 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 research on the physical layer for the short TTI is ongoing, the frame structure for the specific short TTI has not been determined, and the specific short TTI operation method is also absent.
  • the present invention proposes a method for setting a short TTI based frame structure and a method for transmitting information to a terminal about frame structure setting.
  • a short TTI may be composed of a set of 1, 2, 3, 4, and 7 symbols.
  • a method of configuring a short TTI frame structure in consideration of the existing PDCCH, PDSCH, etc. will be described.
  • legacy PDCCH is allocated up to 3 symbols in the entire DL band.
  • the UE can detect the PCFICH first to know the symbol interval to which the PDCCH is allocated.
  • the symbol interval of the PDCCH is always flexible and cannot be fixed to a specific value.
  • Short TTI is a frame structure additionally used in addition to the existing TTI frame structure, it is always appropriate to be set in consideration of the fluid symbol interval of the PDCCH. However, since such a short TTI configuration requires frequent frame changes, an indication of frequent signaling and corresponding terminal operation is required.
  • this proposal proposes a method of using a fixed format regardless of the existing PDCCH interval in setting a short TTI set in an overlay form on an existing frame structure.
  • Option 1-1 Short TTI Extremely 1st OFDM From symbol Can be set.
  • FIG. 3 is a diagram for explaining an example (from 1st symbol) of sTTI based frame setting of ⁇ Method 1-1>.
  • the configuration does not consider the legacy PDCCH region in setting the sTTI-based frame structure.
  • the sTTI-based frame structure is set according to a predefined pattern regardless of the setting of the PDCCH. In this case, although it may overlap with the existing PDCCH region, the frame structure setting is not changed.
  • Option 1-2 Short TTI Minimal legacy PDCCH 'N' Symbol It can be set from the excluded area.
  • FIG. 4 is a diagram for explaining an example of sTTI-based frame setting (from Predefined N symbol, ex) from 2nd symbol of ⁇ Method 1-2>.
  • the sTTI configuration pattern is determined in consideration of the N symbol, which is the minimum legacy PDCCH region, in setting the sTTI-based frame structure. In this case, the following case may occur.
  • This proposal sets and uses sTTI-based frame pattern based on the predefined symbol N regardless of all these setting situations.
  • Option 1-3 Fixed short TTI Format and PDCCH If regions overlap, short TTI of the region is not scheduled.
  • FIG. 5 is a conceptual diagram illustrating sTTI scheduling according to ⁇ Method 1-3>.
  • legacy PDCCH since legacy PDCCH basically performs dynamic scheduling, its region may be changed in subframe units.
  • Figure 3 shows that the legacy PDCCH region is changed from '3 symbol interval' to '2 symbol interval' between successive subframes.
  • FIG. 6 is a diagram for describing a method of delivering sTTI configuration information according to ⁇ Method 2>.
  • the present proposal includes a method for delivering the aforementioned sTTI frame configuration information to UEs, and includes a case for transmitting sTTI configuration information through common signaling.
  • each UE in delivering the entire configuration information of the sTTI rather than the specific individual resource allocation and control information for each UE, each UE can use itself by detecting the common search space (CSS) of the legacy PDCCH located in front of each subframe. An sTTI frame structure can be obtained. In this case, it is impossible to transfer sTTI frequency resource region information that can be read by each UE individually.
  • SCS common search space
  • the sTTI configuration information may include the following.
  • sTTI configuration pattern may be composed of 1/2/3/4/7 symbols, and may convey specific information or pattern information on how the sTTI combination is configured in a subframe.
  • Pattern 1 2 symbols / 3 symbols / 2 symbols / 2 symbols / 3 symbols / 2 symbols (total 14 symbols)
  • Pattern 2 3 symbols / 4 symbols / 3 symbols / 4 symbols (total 14 symbols)
  • sTTI Frequency Domain Allocation Pattern It is assumed that the sTTI subframe is partially configured rather than set over the entire system BW. Therefore, specific RBsets can be set continuously or at equal intervals or concentrated in a specific area.
  • FIG. 7 is a diagram for describing a method of delivering sTTI configuration information according to ⁇ Method 3>.
  • the present proposal includes a method for delivering the aforementioned sTTI frame configuration information to UEs, and includes a case of UE-specific signaling of configuration information for sTTI.
  • the sTTI configuration information is transmitted to the individual terminals through RRC signaling to each terminal.
  • the sTTI configuration information may include the following.
  • sTTI configuration pattern may be composed of 1/2/3/4/7 symbols, and may convey specific information or pattern information on how the sTTI combination is configured in a subframe.
  • Pattern 1 2 symbols / 3 symbols / 2 symbols / 2 symbols / 3 symbols / 2 symbols (total 14 symbols)
  • Pattern 2 3 symbols / 4 symbols / 3 symbols / 4 symbols (total 14 symbols)
  • sTTI Frequency Domain Allocation Pattern It is assumed that the sTTI subframe is partially configured rather than set over the entire system BW. Therefore, specific RBsets can be set continuously or at equal intervals or concentrated in a specific area.
  • Each UE may acquire sTTI frame structure information that may be used by detecting UE specific search space (UESS) of legacy PDCCH located in front of the subframe.
  • UESS UE specific search space
  • Control information transmission of the actual sTTI frame may be performed through the sPDCCH.
  • FIG. 8 illustrates a method of receiving sTTI frame structure configuration information by a terminal according to the present embodiments.
  • the terminal receives configuration information of a short TTI set to the number of arbitrary symbols from the base station (S800).
  • the terminal may receive configuration information of the short TTI set in a fixed format regardless of the existing PDCCH interval from the base station.
  • the short TTI may be set from a 1st OFDM symbol.
  • the short TTI may be set from an area except the minimum legacy PDCCH 'N' symbol.
  • the short TTI of the corresponding region does not perform scheduling. That is, by setting the short TTI irrespective of the existing PDCCH interval, collision may occur in the short TTI region and the legacy PDCCH region. In this embodiment, the collision is omitted by omitting sTTI scheduling.
  • the UE may receive configuration information of the short TTI through a dynamic signaling method through a common control region of the PDCCH.
  • the setting information of the short TTI may include information such as a short TTI configuration pattern and a short TTI frequency domain allocation pattern.
  • the terminal may receive configuration information of the short TTI by RRC signaling, and service triggering through the short TTI frame may be configured by dynamic signaling.
  • the configuration information of the short TTI may include a short TTI configuration pattern, a short TTI frequency domain allocation pattern, and allocation information for each terminal for the short TTI frequency domain resource.
  • the terminal may receive configuration information of the short TTI through higher layer signaling.
  • the terminal receives data through a frame structure including a short TTI set to the number of arbitrary symbols based on the configuration information of the short TTI received from the base station (S810).
  • the number of arbitrary symbols for which the short TTI is set may be two or seven.
  • a specific subframe of the short TTI frame structure may have a configuration pattern in which the number of arbitrary symbols of the short TTI is combined.
  • the terminal may transmit data through a frame structure including a short TTI set to the number of arbitrary symbols.
  • the number of arbitrary symbols may be two, four, or seven.
  • FIG. 9 illustrates a method for transmitting sTTI frame structure configuration information by a terminal according to the present embodiments.
  • the base station sets the short TTI to the number of arbitrary symbols (S900).
  • the base station may set the short TTI in a fixed format regardless of the existing PDCCH interval.
  • the base station may set the short TTI starting from the 1st OFDM symbol.
  • the short TTI may be set from an area excluding a minimum legacy PDCCH 'N' symbol.
  • the short TTI since the short TTI is set regardless of the existing PDCCH interval, collision may occur in the short TTI region and the legacy PDCCH region. If the fixed short TTI format and the PDCCH region overlap, the short TTI of the corresponding region will not be scheduled. Can be.
  • the base station transmits the configuration information of the short TTI to the terminal (S910).
  • the base station may transmit configuration information of the short TTI through a dynamic signaling scheme through a common control region of the PDCCH.
  • the setting information of the short TTI may include information such as a configuration pattern of the short TTI and a short TTI frequency domain allocation pattern.
  • the base station may transmit configuration information of the short TTI by RRC signaling, and service triggering through the short TTI frame may be configured by a dynamic signaling method.
  • the configuration information of the short TTI may include a short TTI configuration pattern, a short TTI frequency domain allocation pattern, and allocation information for each terminal for the short TTI frequency domain resource.
  • the base station may transmit configuration information of the short TTI through higher layer signaling.
  • the base station transmits data through the frame structure including the short TTI set to the number of arbitrary symbols based on the setting information of the short TTI (S920).
  • the number of arbitrary symbols for which the short TTI is set may be two or seven.
  • a specific subframe of the short TTI frame structure may have a configuration pattern in which the number of arbitrary symbols of the short TTI is combined.
  • the base station may receive data through a frame structure including a short TTI set to the number of arbitrary symbols.
  • the number of arbitrary symbols may be two, four, or seven.
  • FIG. 10 illustrates a configuration of a terminal 1000 that receives sTTI frame structure configuration information according to the present embodiments.
  • the terminal 1000 includes a receiver 1010, a controller 1020, and a transmitter 1030.
  • the receiver 1010 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • the controller 1020 controls the overall process of the terminal 1000 according to the sTTI-based frame structure setting and the frame structure setting information necessary for carrying out the above-described present invention.
  • the transmitter 1030 transmits uplink control information, data, and a message to a base station through a corresponding channel.
  • FIG. 11 illustrates a configuration of a base station 1100 transmitting sTTI frame structure configuration information according to the present embodiments.
  • the base station 1100 includes a controller 1110, a transmitter 1120, and a receiver 1130.
  • the controller 1110 controls the overall process of the base station 1100 by transmitting information on the sTTI-based frame structure setting and the frame structure setting necessary for carrying out the above-described present invention to the terminal.
  • the transmitter 1120 and the receiver 1130 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.
  • the present invention has described a method for establishing an sTTI-based frame structure and a specific delivery method for delivering configuration information.
  • the method can be applied to a similar signal and channel as it is, and its application is limited only to a new frame structure. It doesn't work.

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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 d'après la présente invention concernent un procédé de configuration d'une structure de trame à TTI court dans un système évolué 3GPP LTE/LTE et un procédé de transmission d'informations sur la structure de trame à TTI court configurée à un terminal. Les modes de réalisation d'après la présente invention concernent également un procédé de réception d'informations de configuration d'une structure de trame à TTI court par un terminal. Le procédé comprend les étapes consistant à : recevoir, au moyen du terminal, les informations de configuration d'un TTI court configuré de manière à contenir un nombre prédéterminé de symboles ; et recevoir des données par l'intermédiaire d'une structure de trame ayant le TTI court configuré de manière à contenir le nombre prédéterminé de symboles sur la base des informations de configuration du TTI court.
PCT/KR2017/002535 2016-03-14 2017-03-08 Procédé et appareil de configuration d'une structure de trame et de transmission d'informations pendant un tti court WO2017160020A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US16/084,594 US11197309B2 (en) 2016-03-14 2017-03-08 Method and apparatus for frame structure configuration and information transmission for short TTI
CN201780017398.1A CN108781154B (zh) 2016-03-14 2017-03-08 用于短tti的帧结构配置和信息发送的方法和装置

Applications Claiming Priority (4)

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KR20160030172 2016-03-14
KR10-2016-0030172 2016-03-14
KR10-2017-0022956 2017-02-21
KR1020170022956A KR102237525B1 (ko) 2016-03-14 2017-02-21 Short TTI를 위한 프레임 구조 설정 및 정보 전송 방법 및 그 장치

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WO2017160020A1 true WO2017160020A1 (fr) 2017-09-21

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Citations (2)

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US20090175245A1 (en) * 2006-06-19 2009-07-09 Ntt Docomo, Inc. Base station, mobile station, and method of communicating
US20150351093A1 (en) * 2012-09-12 2015-12-03 Futurewei Technologies, Inc. System and Method for Adaptive Transmission Time Interval (TTI) Structure

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EP1437912B1 (fr) * 2003-01-04 2010-09-08 Samsung Electronics Co., Ltd. Procédé pour déterminer le débit de données d'équipement d'utilisateur supportant le service EUDCH
EP1938493B1 (fr) * 2005-08-24 2014-10-08 Qualcomm Incorporated Intervalles de temps d'emission varies de systeme de communication sans fil
CN101415227A (zh) * 2007-10-15 2009-04-22 大唐移动通信设备有限公司 支持高速移动传输的传输时间间隔配置方法、装置及系统

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US20150351093A1 (en) * 2012-09-12 2015-12-03 Futurewei Technologies, Inc. System and Method for Adaptive Transmission Time Interval (TTI) Structure

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