WO2018024068A1 - 一种动态确定上行dmrs的传输位置的方法及设备 - Google Patents

一种动态确定上行dmrs的传输位置的方法及设备 Download PDF

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Publication number
WO2018024068A1
WO2018024068A1 PCT/CN2017/091776 CN2017091776W WO2018024068A1 WO 2018024068 A1 WO2018024068 A1 WO 2018024068A1 CN 2017091776 W CN2017091776 W CN 2017091776W WO 2018024068 A1 WO2018024068 A1 WO 2018024068A1
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Prior art keywords
control channel
downlink control
dmrs
transmitted
time domain
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English (en)
French (fr)
Chinese (zh)
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高雪娟
潘学明
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Priority to US16/322,908 priority Critical patent/US10932246B2/en
Priority to KR1020197005405A priority patent/KR102221136B1/ko
Priority to EP17836250.5A priority patent/EP3496481B1/en
Priority to JP2019505470A priority patent/JP7097349B2/ja
Publication of WO2018024068A1 publication Critical patent/WO2018024068A1/zh
Anticipated expiration legal-status Critical
Priority to JP2022014607A priority patent/JP2022062156A/ja
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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
    • H04L5/0078—Timing of allocation
    • 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—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • 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
    • H04W72/12—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
    • 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
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
    • 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 signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a method and an apparatus for dynamically determining a transmission position of a UL (uplink) DMRS (Demodulation Reference Signal).
  • UL uplink
  • DMRS Demodulation Reference Signal
  • the LTE (Long Term Evolution) FDD (Frequency Division Dual Frequency Division Duplex) system uses a frame structure type (FS1), and its structure is as shown in FIG. 1.
  • FS1 Long Term Evolution
  • the uplink and downlink transmissions use different carrier frequencies, and both the uplink and downlink transmissions use the same frame structure.
  • a 10ms-length radio frame contains 10 1ms subframes, each of which is divided into two 0.5ms long slots.
  • the TTI (Transmission Time Interval) of the uplink and downlink data transmission is 1 ms.
  • the existing LTE TDD (Time Division Duplex) system uses a frame structure type 2 (FS2), as shown in FIG. 2 .
  • FS2 frame structure type 2
  • uplink and downlink transmissions use different subframes or different time slots on the same frequency.
  • Each 10 ms radio frame in FS2 consists of two 5 ms half frames, each of which contains five subframes of 1 ms length.
  • the sub-frames in FS2 are classified into three types: downlink sub-frames, uplink sub-frames, and special sub-frames.
  • Each special sub-frame consists of a downlink transmission time slot (DwPTS, Downlink Pilot Time Slot), a guard interval (GP, Guard Period), and The uplink transmission time slot (UpPTS, Uplink Pilot Time Slot) is composed of three parts.
  • Each field includes at least one downlink subframe and at least one uplink subframe, and at most one special subframe.
  • a typical working mode of short TTI transmission is to include multiple short TTI transmissions shorter than 1 ms in the subframe structure defined in the existing LTE mechanism.
  • the length of the short TTI may be 2, 3, 4, 7 OFDM (Orthogonal Frequency Division Multiplexing) or SC-FDMA (Single-Carrier Frequency-Division Multiple Access) symbols, of course It is also not excluded that the number of other symbols does not exceed 14 or the time domain does not exceed 1 ms.
  • a short TTI is included in one subframe, and each short TTI can be scheduled to the same terminal or a different terminal to perform a short physical uplink control channel (sPUCCH, Shorted Physical Uplink Control CHannel) or short physical uplink shared channel (sPUSCH) transmission.
  • sPUCCH Shorted Physical Uplink Control CHannel
  • sPUSCH short physical uplink shared channel
  • channel transmission and DMRS pattern are defined in units of subframes.
  • Short TTI transmission supports multiple short TTI lengths, and one subframe contains multiple short TTI transmission opportunities, if each If the short TTI contains DMRS, the DMRS overhead is too large.
  • the embodiments of the present disclosure provide a method and a device for dynamically determining a transmission location of an uplink DMRS, and a technical problem of dynamically determining a transmission location of an uplink DMRS to reduce a DMRS overhead of short TTI transmission.
  • a method for dynamically determining a transmission location of an uplink DMRS including: receiving, by a terminal, a downlink control channel; and determining, by the terminal, transmission of an uplink demodulation reference signal DMRS according to the downlink control channel position.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format, and the terminal determines a transmission location of the uplink DMRS according to the downlink control channel, where the terminal determines the downlink according to the downlink control channel.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the method further includes: predefining, in a subframe numbered n or a short TTI, using a downlink control channel of an uplink DCI format to schedule an sPUSCH transmitted in a time domain position of n+k+m1, and
  • the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m2 or the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m1+m2; wherein k is predefined or pre-configured or described
  • the value of the downlink control channel notification, m1 and m2 are the values notified by the downlink control channel, and the units of k, m1, and m2 are subframes or short TTI or SC-FDMA symbols, and n is a natural number; or is defined in the number n.
  • the downlink control channel of the uplink DCI format transmitted in the short TTI is configured to schedule the sPUSCH transmitted in the time domain position of n+k+m, where the DMRS index position is indicated in the downlink control channel, and the DMRS index position is the downlink control
  • the units of k and m are subframes or short TTI or SC-FDMA symbols, and n is a natural number.
  • the method further includes: predefining a plurality of uplink DMRS patterns, each DMRS pattern including at least one sub-frame or a division of each short TTI in the time slot and a location of the DMRS, or at least in each DMRS pattern A relative positional relationship between the DMRS and the short TTI is included, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format
  • the terminal determines a transmission location of the uplink DMRS according to the downlink control channel, where the terminal determines, according to the downlink control channel, a transmission and a location.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the method further includes: predefining a sPUCCH transmitted in a time domain position of n+k+m1 by using a downlink control channel of a downlink DCI format transmitted in a subframe numbered n or a short TTI, and
  • the DMRS of the sPUCCH is transmitted in a time domain location of n+k+m2 or the DMRS of the sPUCCH is transmitted in a time domain location of n+k+m1+m2; wherein k is predefined or pre-configured or described
  • the value of the downlink control channel notification, m1 and m2 are the values notified by the downlink control channel, and the units of k, m1, and m2 are subframes or short TTI or SC-FDMA symbols, and n is a natural number; or is defined in the number n.
  • sPUCCH transmitted in the time domain location or pre-defined sPUCCH transmitted in a time domain position of n+k+m transmitted in a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, where the DMRS index position is indicated in the downlink control channel,
  • the DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUCCH transmission corresponding to the downlink control channel is located; where k is a value defined in advance or pre-configured or notified by the downlink control channel, where m is The value of the downlink control channel notification, the unit of k, m is a subframe or a short TTI or SC-FDMA symbol, and n is natural number.
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates DMRS in one slot/subframe. Specific location transfer.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal.
  • a method for dynamically determining a transmission location of an uplink DMRS including: determining, by a base station, a transmission location of an uplink DMRS; and transmitting, by the base station, a downlink control channel, Information about the transmission location of the uplink DMRS.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the base station determines a transmission location of the uplink DMRS, where the base station determines that the short physical uplink shared channel sPUSCH scheduled by the downlink control channel is a transmission location of the DMRS, and notifying the terminal, by using the downlink control channel, information for determining a transmission location of the DMRS.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the method further includes: predefining, in a subframe numbered n or a short TTI, using a downlink control channel of an uplink DCI format to schedule an sPUSCH transmitted in a time domain position of n+k+m1, and
  • the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m2 or the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m1+m2; wherein k is predefined or pre-configured or described
  • the value of the downlink control channel notification, m1 and m2 are the values notified by the downlink control channel, and the units of k, m1, and m2 are subframes or short TTI or SC-FDMA symbols, and n is a natural number; or is defined in the number n.
  • the value of the row control channel notification, m2 is the value of the downlink control channel notification, the unit of k, m2 is a subframe or a short TTI or SC-FDMA symbol, n is a natural number; or is defined in advance in a subframe numbered n or
  • the downlink control channel transmitted in the short TTI using the uplink DCI format schedules the sPUSCH transmitted in the time domain position of n+k1, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k2+m2; wherein k1 K2 is a value defined in advance or pre-configured or
  • the method further includes: predefining a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or each short TTI partition in the slot, where the DMRS is located, or at least in each DMRS pattern.
  • a relative positional relationship between the DMRS and the short TTI is included, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format
  • the base station determines a transmission location of the uplink DMRS, where the base station determines to transmit ACK/NACK feedback information corresponding to the downlink control channel.
  • a transmission location of the DMRS of the sPUCCH and notifying the terminal, by using the downlink control channel, information for determining a transmission location of the DMRS.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the method further includes: predefining a sPUCCH transmitted in a time domain position of n+k+m1 by using a downlink control channel of a downlink DCI format transmitted in a subframe numbered n or a short TTI, and
  • the DMRS of the sPUCCH is transmitted in a time domain location of n+k+m2 or the DMRS of the sPUCCH is transmitted in a time domain location of n+k+m1+m2; wherein k is predefined or pre-configured or described
  • the value of the downlink control channel notification, m1, m2 are the downlink control signals
  • the value of the channel notification, the unit of k, m1, m2 may be a subframe or a short TTI or SC-FDMA symbol; or a downlink control channel scheduling using a downlink DCI format transmitted in a subframe numbered n or a short TTI sPUCCH transmitted in the time domain position of n+k1+m1,
  • n is a natural number; or pre-defined sPUCCH transmitted in the time domain position of n+k using the downlink control channel of the downlink DCI format transmitted in the subframe numbered n or short TTI And the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, and m2 is a value notified by the downlink control channel, The unit of k and m2 is a subframe or a short TTI or SC-FDMA symbol, and n is a natural number; The subframe numbered n or the downlink control channel transmitted in the short TTI using the downlink DCI format schedules the sPUCCH transmitted in the time domain position of n+k1, and the DMRS of the sPUCCH is in the time domain position of n+k2+m2 Medium transmission; wherein k1,
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates that the DMRS is in a specific location of one slot/subframe. transmission.
  • the downlink control The channel indicates that the DMRS is transmitted between a plurality of uplink short TTIs that the terminal is scheduled.
  • a terminal including: a receiving module, configured to receive a downlink control channel; and a first determining module, configured to determine, according to the downlink control channel, an uplink demodulation reference signal DMRS Transmission location.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the determining module is further configured to: determine, according to the downlink control channel, a DMRS of the short physical uplink shared channel sPUSCH scheduled by the downlink control channel. Transmission location.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the terminal further includes: a first configuration module, configured to pre-define a time domain of the downlink control channel using the uplink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • a first configuration module configured to pre-define a time domain of the downlink control channel using the uplink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • the transmitted sPUSCH, and the DMRS of the sPUSCH is transmitted in a time domain position of n+k2+m2; wherein k1, k2 are pre-defined or pre-configured or the value of the downlink control channel notification, and m2 is the downlink
  • the value of the control channel notification, the unit of k1, k2, m2 is the subframe Or short TTI or SC-FDMA symbol, n is a natural number; or pre-defined sPUSCH transmitted in the time domain position of n+k by using the uplink control channel of the uplink DCI format transmitted in the subframe numbered n or short TTI
  • the sPUSCH transmitted in the time domain position of n+k+m is scheduled to be allocated in the subframe of the number n or the short TTI, and the downlink control channel is transmitted in the short TTI, and the DMRS is indicated in the downlink control channel.
  • DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUSCH transmission scheduled by the downlink control channel is located; wherein k is a predefined or pre-configured or the downlink control channel notification
  • m is the value of the downlink control channel notification, and the unit of k and m is a subframe or a short TTI or SC-FDMA symbol, and n is a natural number.
  • the terminal further includes: a second configuration module, configured to pre-define a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a short TTI partition in the time slot and a location of the DMRS, Or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • a second configuration module configured to pre-define a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a short TTI partition in the time slot and a location of the DMRS, Or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format
  • the determining module is further configured to: determine, according to the downlink control channel, an sPUCCH that transmits ACK/NACK feedback information corresponding to the downlink control channel. The transmission location of the DMRS.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the terminal further includes: a third configuration module, configured to pre-define a time domain of the downlink control channel using the downlink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • a third configuration module configured to pre-define a time domain of the downlink control channel using the downlink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • k is a pre- Defining or pre-configuring or the value of the downlink control channel notification
  • m1, m2 are values notified by the downlink control channel
  • units of k, m1, and m2 are subframes or short T
  • k1 and k2 are predefined Or pre-configured or the value of the downlink control channel notification
  • m2 is the value notified by the downlink control channel
  • the units of k1, k2, and m2 are subframes or short TTI or SC-FDMA symbols
  • n is a natural number
  • predefined Transmitted in sub-frame numbered n or short TTI using the downstream DCI format The row control channel schedules the sPUCCH transmitted in the time domain position of n+k, or the downlink control channel using the downlink DCI format transmitted in the subframe numbered n or the short TTI is scheduled to be scheduled at n+k+m.
  • sPUCCH transmitted in the domain location, where the DMRS index position is indicated in the downlink control channel, where the DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUCCH transmission corresponding to the downlink control channel is located;
  • k is a value defined in advance or pre-configured or notified by the downlink control channel
  • m is a value notified by the downlink control channel
  • units of k and m are subframes or short TTI or SC-FDMA symbols
  • n is a natural number.
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates DMRS in one slot/subframe. Specific location transfer.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal.
  • a base station including: a second determining module, configured to determine a transmission location of an uplink DMRS; and a notification module, configured to send a downlink control channel, to notify the terminal to determine the location Information about the transmission location of the uplink DMRS.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the second determining module is further configured to: determine a short physical uplink share scheduled by the downlink control channel. a transmission location of the DMRS of the channel sPUSCH, and notifying the terminal, by using the downlink control channel, information for determining a transmission location of the DMRS.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the base station further includes: a fourth configuration module, configured to pre-define a time domain of the downlink control channel using the uplink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • a fourth configuration module configured to pre-define a time domain of the downlink control channel using the uplink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • n is a pre- Defining or pre-configuring or the value of the downlink control channel notification
  • m1, m2 are values notified by the downlink control channel
  • units of k, m1, and m2 are subframes or short TTI or SC-FDMA symbols
  • n is a natural number
  • the DMRS transmitted in the time domain location of +m2 or the sPUSCH is transmitted in a time domain position of n+k2+
  • the transmitted sPUSCH, and the DMRS of the sPUSCH is transmitted in a time domain position of n+k2+m2; wherein k1, k2 are pre-defined or pre-configured or the value of the downlink control channel notification, and m2 is the downlink
  • the value of the control channel notification, the unit of k1, k2, m2 is a subframe or a short TTI or SC-FDMA symbol, n is a natural number; or it is pre-defined to be transmitted in a subframe numbered n or a short TTI using the uplink DCI format.
  • Downlink control channel scheduling is transmitted in the time domain position of n+k
  • the downlink control channel Indicates a DMRS index location, the DMRS index location
  • the value of the control channel notification, the unit of k, m is a subframe or a short TTI or SC-FDMA symbol, and n is a natural number.
  • the base station further includes: a fifth configuration module, configured to pre-define a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a short TTI partition in the time slot, where the DMRS is located, Or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • a fifth configuration module configured to pre-define a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a short TTI partition in the time slot, where the DMRS is located, Or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format
  • the second determining module is further configured to: determine a DMRS transmission of an sPUCCH that transmits ACK/NACK feedback information corresponding to the downlink control channel. Positioning, and notifying the terminal, by using the downlink control channel, information for determining a transmission location of the DMRS.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the base station further includes: a sixth configuration module, configured to pre-define a time domain of the downlink control channel using the downlink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • a sixth configuration module configured to pre-define a time domain of the downlink control channel using the downlink DCI format transmitted in the subframe numbered n or the short TTI, where n+k+m1 is scheduled.
  • s PUCCH transmitted in the location and the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m2 or the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m1+m2;
  • k is a pre- Defining or pre-configuring or the value of the downlink control channel notification
  • m1, m2 are values notified by the downlink control channel, and units of k, m1, m2 may be subframes or short TTI or SC-FDMA symbols; or predefined Scheduling the sPUCCH transmitted in the time domain position of n+k1+m1 in the downlink control channel of the downlink DCI format transmitted in the subframe numbered n or the short TTI, and the DMRS of the sPUCCH is at n+k2+m2
  • the DMRS transmitted in the time domain location or the sPUCCH is transmitted in a time domain position of n+k2
  • sPUCCH scheduled to be transmitted in a time domain position of n+k in a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, and the DMRS of the sPUCCH is at n+k Transmission in the time domain location of +m2;
  • k is a predefined or pre-configured or the downlink control letter
  • the value of the channel notification, m2 is the value of the downlink control channel notification, and the unit of k and m2 is a subframe or a short TTI or SC-FDMA symbol; the downlink used in the subframe numbered n or the short TTI is defined in advance.
  • the downlink control channel of the DCI format schedules the sPUCCH transmitted in the time domain position of n+k1, and the DMRS of the sPUCCH is transmitted in the time domain position of n+k2+m2; wherein k1 and k2 are predefined or pre-configured Or the value of the downlink control channel notification, m2 is a value notified by the downlink control channel, the unit of k1, k2, and m2 is a subframe or a short TTI or an SC-FDMA symbol; or is defined in a subframe numbered n.
  • the downlink control channel using the downlink DCI format transmitted in the short TTI scheduling the sPUCCH transmitted in the time domain position of n+k, or predefining the downlink using the downlink DCI format transmitted in the subframe numbered n or the short TTI
  • the control channel schedules an sPUCCH transmitted in a time domain position of n+k+m, where the DMRS index position is indicated in the downlink control channel, where the DMRS index position is a subframe in which the sPUCCH transmission corresponding to the downlink control channel is located or SC-FDMA symbol number in the slot;
  • K is a predefined or preconfigured value or the downlink control channel notified
  • m is a value of the downlink control channel notified, k, m units of TTI or subframe or short SC-FDMA symbols.
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates that the DMRS is in a specific location of one slot/subframe. transmission.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal.
  • the DMRS position of the uplink transmission is obtained through the downlink control channel, so that the location of the DMRS insertion is determined according to the transmission condition of the sPUSCH/sPUCCH.
  • the DMRS overhead of short TTI transmission is reduced, and on the other hand, the DMRS demodulation performance is improved.
  • FIG. 1 is a schematic diagram of a frame structure used by an LTE FDD system
  • FIG. 2 is a schematic diagram of a frame structure used by an LTE FDD system
  • FIG. 3 is a flowchart of a method for dynamically determining a transmission location of an uplink DMRS in some embodiments of the present disclosure
  • FIG. 5 is a schematic diagram of a base station determining to continuously schedule three terminals in one slot for sPUSCH transmission with a length of two SC-FDMA symbols in some embodiments of the present disclosure
  • FIG. 6 is a schematic diagram of a scheduling manner in some embodiments of the present disclosure.
  • FIG. 7 is a schematic diagram of a DMRS pattern in some embodiments of the present disclosure.
  • FIG. 8 is a schematic diagram of a DMRS pattern in some embodiments of the present disclosure.
  • FIG. 9 is a structural block diagram of a terminal in some embodiments of the present disclosure.
  • FIG. 10 is a structural block diagram of a base station in some embodiments of the present disclosure.
  • FIG. 11 is a structural block diagram of a terminal according to some embodiments of the present disclosure.
  • FIG. 12 is a structural block diagram of a base station according to some embodiments of the present disclosure.
  • embodiments of the present disclosure may be implemented as a system, apparatus, device, method, or computer program product.
  • embodiments of the present disclosure may be embodied in the form of full hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.
  • the device involved includes a base station and a terminal, and the base station and the terminal accessing the base station can perform downlink transmission and uplink reception.
  • the terminal may also be referred to as a User Equipment (UE), or may be called a Terminal, a Mobile Station (MS), a Mobile Terminal, etc., and the terminal may be connected to the Radio Access Network (Radio).
  • the Access Network (RAN) communicates with one or more core networks.
  • the terminal may be a mobile phone (or "cellular" phone), a computer with a mobile terminal, etc., for example, the terminal may also be portable, pocket-sized. , handheld, computer built-in or in-vehicle mobile devices that exchange voice and/or data with a wireless access network.
  • the terminal in the embodiment of the present disclosure may also be a Device to Device (D2D) terminal or a Machine to Machine (M2M) terminal.
  • D2D Device to Device
  • M2M Machine to Machine
  • Step 301 The terminal receives the downlink control channel;
  • Step 302 The terminal determines the uplink according to the downlink control channel.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the foregoing step 302 the terminal determines a transmission location of the uplink DMRS according to the downlink control channel, where the terminal determines the downlink according to the downlink control channel.
  • sPUSCH and DMRS use different scheduling timings.
  • the method further includes: predefining a downlink control channel using an uplink DCI format transmitted in a subframe numbered n or a short TTI, where n+k+m1 (n+k+m1) Representing an sPUSCH transmitted in a time domain position with respect to a subframe numbered n or a short TTI delay of k + m1 units, and the DMRS of the sPUSCH is transmitted in a time domain position of n + k + m 2 Or the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m1+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, and m1, m2 are the downlink control channel notification
  • the value of k, m1, m2 is a subframe or a short TTI or SC-FDMA symbol (in one embodiment, k is in units of subframes or short TTIs, m1 and m
  • the downlink control channel schedules the sPUSCH transmitted in the time domain position of n+k1+m1, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k2+m2 or The DMRS of the sPUSCH is transmitted in a time domain position of n+k2+m1+m2; wherein k1 and k2 are pre-defined or pre-configured or the value of the downlink control channel notification, and m1 and m2 are the downlink control channel.
  • the value of the notification, the unit of k1, k2, m1, m2 is a subframe or a short TTI or SC-FDMA symbol (in one embodiment, k1, k2 are in units of subframes or short TTIs, and m1 and m2 are in SC-FDMA symbols) In another embodiment, k1, k2, and m1 are in units of subframes or short TTIs, m2 is in SC-FDMA symbols, and n is a natural number; or pre-defined in subframe numbered n or short TTI
  • the downlink control channel transmitted in the uplink DCI format is used to schedule the sPUSCH transmitted in the time domain position of n+k, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k+m2; wherein k is a predefined Or pre-configured or the value of the downlink control channel notification, m2 is The value of the downlink control channel notification, the unit of k, m2 is a
  • the downlink control channel of the DCI format schedules the sPUSCH transmitted in the time domain position of n+k+m Determining a DMRS index position in the downlink control channel, where the DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUSCH transmission scheduled by the downlink control channel is located; wherein k is a predefined or advanced Configuring or the value of the downlink control channel notification, where m is the value of the downlink control channel notification, and the units of k and m are subframes or short TTI or SC-FDMA symbols (an embodiment, k is a subframe or a short The TTI is a unit, m is in units of SC-FDMA symbols, and in another embodiment, k and m are in units of subframes or short TTIs, and n is a natural number.
  • m1 and m2 need to be pre-defined or pre-configured for the sPUSCH and the DMRS respectively or the downlink control channel is notified, and the defined units of m1 and m2 may be the same (for example, all in units of SC-FDMA symbols) or different (for example, m1 Subframe or short TTI in units, m2 in SC-FDMA symbols);
  • the method further includes: predefining a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a division of each short TTI in the slot and a location of the DMRS, Or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel (ie, a DL grant or a downlink control channel indicating downlink SPS resource release) using a downlink DCI format.
  • Step 302 The terminal determines, according to the downlink control channel, the transmission location of the uplink DMRS, where the terminal determines, according to the downlink control channel, a transmission location of the DMRS of the sPUCCH that transmits the ACK/NACK feedback information corresponding to the downlink control channel.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the method further includes: predefining a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, and scheduling the time domain position at n+k+m1.
  • the transmitted sPUCCH, and the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m2 or the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m1+m2; wherein k is a predefined Or pre-configured or the value of the downlink control channel notification, m1, m2 are the values notified by the downlink control channel, and the units of k, m1, and m2 are subframes or short TTI or SC-FDMA symbols (an embodiment, k is in units of subframes or short TTIs, m1 and m2 are in units of SC-FDMA symbols, and in another embodiment, k and m1 are in units of subframes or short T
  • k1, k2, and m1 are in units of subframes or short TTIs, and m2 is in SC.
  • -FDMA symbol is a unit, n is a natural number; or pre-defined sPUCCH transmitted in a time domain position of n+k, which is transmitted in a subframe of number n or a short TTI, using a downlink control channel of the downlink DCI format, and The DMRS of the sPUCCH is transmitted in a time domain position of n+k+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, and m2 is a value notified by the downlink control channel, k,
  • the unit of m2 is a subframe or a short TTI or SC-FDMA symbol (one embodiment, k is in units of subframes or short TTI, m2 is in units of SC-FDMA symbols), n is a natural number; pre-defined at number n The
  • the TDM uses different uplink short TTI transmissions.
  • the downlink control channel indicates that the DMRS is transmitted at a specific location of one slot/subframe, for example, the first symbol in one slot/subframe. , or other location in a slot/subframe.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal, for example, the multiple Between the i-th uplink short TTI and the i+1th uplink short TTI in the uplink short TTI, the multiple uplink short TTI transmissions share the same time domain location transmission DMRS, or the multiple uplink short TTI transmissions Both are based on the same DMRS for channel estimation.
  • the DMRS position of the uplink transmission is obtained through the downlink control channel, so that the location of the DMRS insertion is determined according to the transmission condition of the sPUSCH/sPUCCH.
  • the DMRS overhead of short TTI transmission is reduced, and on the other hand, the DMRS demodulation performance is improved.
  • Step 401 A base station determines a transmission location of an uplink DMRS.
  • Step 402 The base station sends a downlink control channel, and notifies the terminal to determine information about a transmission location of the uplink DMRS.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the transmission location of the DMRS and informs the terminal through the downlink control channel of information for determining the transmission location of the DMRS.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the method further includes: predefining a downlink control channel using an uplink DCI format transmitted in a subframe numbered n or a short TTI, where n+k+m1 (n+k+m1) Representing an sPUSCH transmitted in a time domain position with respect to a subframe numbered n or a short TTI delay of k + m1 units, and the DMRS of the sPUSCH is transmitted in a time domain position of n + k + m 2 Or the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m1+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, and m1, m2 are the downlink control channel notification
  • the value of k, m1, m2 is a subframe or a short TTI or SC-FDMA symbol (in one embodiment, k is in units of subframes or short TTIs, m1 and m
  • the downlink control channel schedules the sPUSCH transmitted in the time domain position of n+k1+m1, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k2+m2 or The DMRS of the sPUSCH is transmitted in a time domain position of n+k2+m1+m2; wherein k1 and k2 are pre-defined or pre-configured or the value of the downlink control channel notification, and m1 and m2 are the downlink control channel.
  • the value of the notification, the unit of k1, k2, m1, m2 is a subframe or a short TTI or SC-FDMA symbol (in one embodiment, k1, k2 are in units of subframes or short TTIs, and m1 and m2 are in SC-FDMA symbols) In another embodiment, k1, k2, and m1 are in units of subframes or short TTIs, m2 is in SC-FDMA symbols, and n is a natural number; or pre-defined in subframe numbered n or short TTI
  • the downlink control channel transmitted in the uplink DCI format is used to schedule the sPUSCH transmitted in the time domain position of n+k, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k+m2; wherein k is a predefined Or pre-configured or the value of the downlink control channel notification, m2 is the value of the downlink control channel notification, and the units of k and m2 are sub
  • k is in units of subframes or short TTIs
  • m2 is in units of SC-FDMA symbols
  • n is a natural number; or pre-defined to use the uplink DCI format for transmission in a subframe numbered n or a short TTI
  • the downlink control channel schedules the sPUSCH transmitted in the time domain position of n+k1, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k2+m2; wherein k1, k2 are predefined or pre-configured or
  • the value of the downlink control channel notification, m2 is the value of the downlink control channel notification, and the units of k1, k2, and m2 are subframes or short TTI or SC-FDMA symbols (in one embodiment, k1, k2 are in subframes or The short TTI is in units, m2 is in SC-FDMA symbols, and n is a natural number; or the downlink control channel using the uplink DCI format transmitted in the sub
  • the value of k, m is a subframe or a short TTI or SC-FDMA symbol (in one embodiment, k is in units of subframes or short TTIs, m is in units of SC-FDMA symbols, another embodiment, Both k and m are in subframes or short TTIs, and n is a natural number.
  • m1 and m2 need to be pre-defined or pre-configured for the sPUSCH and the DMRS respectively or the downlink control channel is notified, and the defined units of m1 and m2 may be the same (for example, all in units of SC-FDMA symbols) or different (for example, m1
  • the subframe or short TTI is in units, and m2 is in units of SC-FDMA symbols.
  • the method further includes: predefining a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a short TTI partition in the time slot, where the DMRS is located, Or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format
  • Control channel corresponding ACK/NACK feedback information a transmission location of the DMRS of the sPUCCH, and notifying the terminal, by using the downlink control channel, information for determining a transmission location of the DMRS.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the method further includes: predefining a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, and scheduling the time domain position at n+k+m1.
  • the transmitted sPUCCH, and the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m2 or the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m1+m2; wherein k is a predefined Or pre-configured or the value of the downlink control channel notification, m1, m2 are the values notified by the downlink control channel, and the units of k, m1, m2 may be subframes or short TTI or SC-FDMA symbols (an embodiment) , k is in units of subframes or short TTIs, m1 and m2 are in units of SC-FDMA symbols, and in another embodiment, k and m1 are in units of subframes or
  • k1, k2, and m1 are in units of subframes or short TTIs, and m2 is in SC-FDMA.
  • a symbol is a unit; or a sPUCCH transmitted in a time domain position of n+k scheduled to be transmitted in a subframe of the number n or a short TTI transmitted using a downlink DCI format, and the DMRS of the sPUCCH is And transmitting in a time domain position of n+k+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, m2 is a value notified by the downlink control channel, and units of k and m2 are subframes Or short TTI or SC-FDMA symbols (in one embodiment, k is in units of subframes or short TTIs, m2 is in SC-FDMA symbols), n is a natural number; pre-defined in subframe numbered n or short TTI The downlink control channel transmitted in the downlink
  • the unit is a subframe or a short TTI or SC-FDMA symbol (in one embodiment, k1, k2 are in units of subframes or short TTIs, m2 is in units of SC-FDMA symbols), n is a natural number; or is pre-defined in the number Scheduling an sPUCCH transmitted in a time domain position of n+k for a subframe of n or a downlink control channel transmitted in a short TTI using a downlink DCI format, or pre-defined for transmission in a subframe numbered n or a short TTI
  • the downlink control channel of the downlink DCI format schedules an sPUCCH transmitted in a time domain position of n+k+m, where the DMRS index position is indicated in the downlink control channel, and the DMRS index position is an sPUCCH transmission corresponding to the downlink control channel.
  • the SC-FDMA symbol number in the subframe or slot in which it is located where k is a value defined in advance or pre-configured or notified by the downlink control channel, m is a value notified by the downlink control channel, a unit of k, m a subframe or a short TTI or SC-FDMA symbol (in one embodiment, k is in units of subframes or short TTIs, m is in units of SC-FDMA symbols, and in another embodiment, k and m are in subframes or Short TTI is the unit), and n is a natural number.
  • m1 and m2 are different, and the sPUCCH and the DMRS need to be pre-defined or pre-configured respectively or the downlink control channel is notified.
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates DMRS in one time slot.
  • the downlink control channel indicates DMRS in one time slot. /Special location transmission of a subframe, such as on the first symbol in a slot/subframe, or other location in a slot/subframe.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal, for example, the multiple Between the i-th uplink short TTI and the i+1th uplink short TTI in the uplink short TTI, the multiple uplink short TTI transmissions share the same time domain location transmission DMRS, or the multiple uplink short TTI transmissions Both are based on the same DMRS for channel estimation.
  • the DMRS position of the uplink transmission is obtained through the downlink control channel, so that the location of the DMRS insertion is determined according to the transmission condition of the sPUSCH/sPUCCH.
  • the DMRS overhead of short TTI transmission is reduced, and on the other hand, the DMRS demodulation performance is improved.
  • the base station determines to continuously schedule 3 terminals in one slot for sPUSCH transmission of 2 SC-FDMA symbols, as shown in FIG. 5; the specific process is as follows:
  • the base station transmits the UL grant 1 in the subframe numbered n or the short TTI, and is used to schedule the terminal 1 to transmit the sPUSCH in the time domain corresponding to n+k+m1, and the DMRS of the sPUSCH is at n+k+m2.
  • the base station transmits the UL grant 2 in the subframe numbered n or the short TTI, and is used for scheduling the terminal 2 to transmit the sPUSCH in the time domain position corresponding to n+k+m1, and the DMRS of the sPUSCH is at n+k+
  • the UL grant 2 is transmitted in a subframe or a short TTI.
  • the base station transmits the UL grant 3 in the subframe numbered n or the short TTI, and is used for scheduling the terminal 3 to transmit the sPUSCH in the time domain position corresponding to n+k+m1, and the DMRS of the sPUSCH is at n+k+
  • the terminal 1 receives the UL grant 1 in the subframe numbered n or the short TTI, determines that the sPUSCH is transmitted in the time domain position corresponding to n+k+m1, and transmits the DMRS of the sPUSCH in the time domain position of n+k+m2.
  • the m1 is indicated by the first indication field carried in the UL grant1
  • the m2 is indicated by the second indication field carried in the UL grant1
  • k is predefined, for example, k is in the short TTI length of the sPUSCH.
  • the terminal 2 receives the UL grant 2 in the subframe numbered n or the short TTI, determines to transmit the sPUSCH in the time domain location corresponding to n+k+m1, and transmits the sPUSCH in the time domain position of n+k+m2.
  • the unit and the time domain position transmission DMRS of m2 0 SC-FDMA symbols, that is, the subframe numbered n or the seventh SC-FDMA symbol transmission DMRS after the short TTI; of course, the terminal 2 may also be in other numbered sub-
  • the UL grant 2 is received in the frame or short TTI, and the corresponding m1 and m2 values are obtained.
  • the sPUSCH and DMRS transmission can be performed at the above
  • the terminal 3 receives the UL grant 3 in the subframe numbered n or the short TTI, determines to transmit the sPUSCH in the time domain position corresponding to n+k+m1, and transmits the sPUSCH in the time domain position of n+k+m2.
  • the domain location performs sPUSCH and DMRS transmission.
  • the DMRS may be indicated between multiple sPUSCH transmissions of the terminal, for example, the scheduling mode shown in FIG. 6, where the scheduling timing of the sPUSCH and the DMRS
  • the process is similar to the above process and will not be described again;
  • the scheduling sequence is defined as similar to other forms of implementation, and details are not described herein. If the transmission time of the DMRS leads the sPUSCH, the m2 value may be a negative value; the implementation process of replacing all or part of the sPUSCH with the sPUCCH is the same. To replace the corresponding UL grant with the DL grant, you will not repeat them.
  • the two DMRS patterns shown in FIG. 7 and FIG. 8 are predefined in the standard protocol, and the base station may select a DMRS pattern according to the actual scheduling situation in the current time slot, and notify the terminal by using the downlink control channel.
  • the terminal determines the DMRS position in one slot according to the DMRS pattern notified in the downlink control channel, and determines the transmission position of the sPUSCH according to the scheduling timing.
  • the DL sTTI and the UL sTTI may use the same frequency resource, that is, the TDD mode, or different frequency domain resources, that is, the FDD mode; therefore, the disclosed method is applicable to both the TDD and the FDD system.
  • the terminal 900 includes: a receiving module 901, configured to receive a downlink control channel, and a first determining module 902, configured to determine, according to the downlink control channel, The transmission position of the uplink demodulation reference signal DMRS.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the determining module is further configured to: determine, according to the downlink control channel, a short physics scheduled by the downlink control channel.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the terminal further includes: a first configuration module, configured to preset The sPUSCH transmitted in the time domain position of n+k+m1 is scheduled in the subframe numbered n or the downlink control channel transmitted in the short TTI using the uplink DCI format, and the DMRS of the sPUSCH is at n+k+m2
  • the DMRS transmitted in the time domain location or the sPUSCH is transmitted in a time domain position of n+k+m1+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, m1, m2 are
  • the value of the downlink control channel notification, the unit of k, m1, m2 is a subframe or a short TTI or SC-FDMA symbol, and n is a natural number; or the uplink used for transmission in a subframe numbered n or a short TTI is defined in advance.
  • the downlink control channel of the DCI format schedules the sPUSCH transmitted in the time domain position of n+k1+m1, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k2+m2 or the DMRS of the sPUSCH is at n+k2 +m1+m2 is transmitted in a time domain position; wherein k1 and k2 are values defined in advance or pre-configured or reported by the downlink control channel, and m1 and m2 are values notified by the downlink control channel, k1, k2, and m1
  • the unit of m2 is a subframe or a short TTI or SC-FDMA symbol, n is a natural number; or is predefined in a subframe numbered n.
  • the time domain location is transmitted; wherein k1, k2 are pre-defined or pre-configured or the downlink control channel notification value, m2 is the value of the downlink control channel notification, and the units of k1, k2, and m2 are subframes or short.
  • n is a natural number; or a sPUSCH transmitted in a time domain position of n+k, which is scheduled to be transmitted in a subframe numbered n or a short TTI, using an uplink DCI format, or Predefining a sPUSCH transmitted in a time domain position of n+k+m in a downlink control channel using an uplink DCI format transmitted in a subframe numbered n or a short TTI, where the DMRS index position is indicated in the downlink control channel
  • the DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUSCH transmission scheduled by the downlink control channel is located; where k is a value defined in advance or pre-configured or notified by the downlink control channel , m is the stated Value, k, m channel units of rows notified subframe or TTI or short SC-FDMA symbols, n is a natural number.
  • the terminal further includes: a second configuration module, configured to pre-define a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one short subframe or one short TTI in the time slot.
  • the partitioning and the location of the DMRS, or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format
  • the determining module is further configured to: determine, according to the downlink control channel, to transmit an ACK corresponding to the downlink control channel. /NACK feedback information of the sPUCCH DMRS transmission location.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the terminal further includes: a third configuration module, configured to pre-define a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, where n+ is configured.
  • a third configuration module configured to pre-define a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, where n+ is configured.
  • sPUCCH transmitted in the time domain position of k+m1 and the DMRS of the sPUCCH is transmitted in the time domain position of n+k+m2 or the DMRS of the sPUCCH is transmitted in the time domain position of n+k+m1+m2
  • k is a value defined in advance or pre-configured or notified by the downlink control channel
  • m1, m2 are values notified by the downlink control channel
  • units of k, m1, m2 are subframes or short TTI or SC-FDMA a symbol
  • the DMRS is transmitted in a time domain position of n+k2+m2; wherein k1 and k2 are pre-defined or pre-configured or the value of the downlink control channel notification, and m2 is a value notified by the downlink control channel, k1, k2
  • the unit of m2 is a subframe or a short TTI or SC-FDMA symbol, and n is a natural number; or a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI is pre-defined to be scheduled at n+k
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates that the DMRS is in the DMRS.
  • a specific location of a slot/subframe is transmitted.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal.
  • the DMRS position of the uplink transmission is obtained through the downlink control channel, so that the location of the DMRS insertion is determined according to the transmission condition of the sPUSCH/sPUCCH.
  • the DMRS overhead of short TTI transmission is reduced, and on the other hand, the DMRS demodulation performance is improved.
  • the base station 1000 includes: a second determining module 1001, configured to determine a transmission location of an uplink DMRS, and a notification module 1002, configured to send a downlink control channel, Notifying the terminal of information for determining a transmission location of the uplink DMRS.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the second determining module is further configured to: determine a short physical uplink shared channel sPUSCH scheduled by the downlink control channel. a transmission location of the DMRS, and notifying the terminal, by using the downlink control channel, information for determining a transmission location of the DMRS.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the base station further includes: a fourth configuration module, configured to pre-define a downlink control channel tone that uses an uplink DCI format and is transmitted in a subframe numbered n or a short TTI.
  • the sPUSCH transmitted in the time domain position of n+k+m1 and the DMRS of the sPUSCH is transmitted in the time domain position of n+k+m2 or the DMRS of the sPUSCH is at n+k+m1+m2
  • k is a value defined in advance or pre-configured or notified by the downlink control channel
  • m1 and m2 are values notified by the downlink control channel
  • units of k, m1, and m2 are subframes or short TTIs.
  • n is a natural number; or pre-defined sPUSCH transmitted in a time domain position of n+k1+m1 using a downlink control channel of the uplink DCI format transmitted in a subframe numbered n or a short TTI, And the DMRS of the sPUSCH is transmitted in a time domain position of n+k2+m2 or the DMRS of the sPUSCH is transmitted in a time domain position of n+k2+m1+m2; wherein k1 and k2 are predefined or pre-configured Or the value of the downlink control channel notification, m1, m2 are the values notified by the downlink control channel, and the units of k1, k2, m1, and m2 are subframes or short TTI or SC-FDMA symbols, and n is a natural number; or Defining a downlink control channel using the uplink DCI format transmitted in a subframe numbered n or a short TTI to schedule a
  • the time domain location is transmitted; wherein k1, k2 are pre-defined or pre-configured or the downlink control channel notification value, m2 is the value of the downlink control channel notification, and the units of k1, k2, and m2 are subframes or short.
  • n is a natural number; or a sPUSCH transmitted in a time domain position of n+k, which is scheduled to be transmitted in a subframe numbered n or a short TTI, using an uplink DCI format, or Predefining a sPUSCH transmitted in a time domain position of n+k+m in a downlink control channel using an uplink DCI format transmitted in a subframe numbered n or a short TTI, where the DMRS index position is indicated in the downlink control channel
  • the DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUSCH transmission scheduled by the downlink control channel is located; where k is a value defined in advance or pre-configured or notified by the downlink control channel , m is the stated Value, k, m channel units of rows notified subframe or TTI or short SC-FDMA symbols, n is a natural number.
  • the base station further includes: a fifth configuration module, configured to be predefined a plurality of uplink DMRS patterns, each DMRS pattern includes at least one sub-frame or a division of each short TTI in the time slot, where the DMRS is located, or each DMRS pattern includes at least a relative positional relationship between the DMRS and the short TTI,
  • the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format
  • the second determining module is further configured to: determine to transmit ACK/NACK feedback information corresponding to the downlink control channel. a transmission location of the DMRS of the sPUCCH, and notifying the terminal, by using the downlink control channel, information for determining a transmission location of the DMRS.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the base station further includes: a sixth configuration module, configured to pre-define a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, where n+ is configured.
  • a sixth configuration module configured to pre-define a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI, where n+ is configured.
  • sPUCCH transmitted in the time domain position of k+m1 and the DMRS of the sPUCCH is transmitted in the time domain position of n+k+m2 or the DMRS of the sPUCCH is transmitted in the time domain position of n+k+m1+m2
  • k is a value defined in advance or pre-configured or notified by the downlink control channel
  • m1, m2 are values notified by the downlink control channel
  • units of k, m1, m2 may be subframes or short TTI or SC- FDMA
  • a short TTI or SC-FDMA symbol or a sPUCCH that is pre-defined to transmit in a time domain position of n+k using a downlink control channel of the downlink DCI format transmitted in a subframe numbered n or a short TTI, and the sPUCCH
  • the DMRS is transmitted in a time domain position of n+k+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, and m2 is a value notified by the downlink control channel, a unit of k and m2 a sub-frame or a short TTI or SC-FDMA symbol; a sPUCCH transmitted in a time domain position of n+k1 scheduled to be transmitted in a subframe of number n or a short TTI transmitted using a downlink DCI format, and The DMRS of the sPUCCH is transmitted in a time domain position of n+k2+m2; wherein k1,
  • the downlink control channel schedules the sPUCCH transmitted in the time domain position of n+k, or the downlink control channel using the downlink DCI format transmitted in the subframe numbered n or the short TTI is scheduled to be scheduled at n+k+m.
  • sPUCCH transmitted in the domain location, where the DMRS index position is indicated in the downlink control channel, where the DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUCCH transmission corresponding to the downlink control channel is located;
  • k is a value defined in advance or pre-configured or notified by the downlink control channel
  • m is a value notified by the downlink control channel
  • units of k and m are subframes or short TTI or SC-FDMA symbols.
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates that the DMRS is in one time slot. / The specific location of the sub-frame transmission.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal.
  • the DMRS position of the uplink transmission is obtained through the downlink control channel, so that the location of the DMRS insertion is determined according to the transmission condition of the sPUSCH/sPUCCH.
  • the DMRS overhead of short TTI transmission is reduced, and on the other hand, the DMRS demodulation performance is improved.
  • an embodiment of the present disclosure provides another structure of the terminal, including: a first transceiver 1101, receiving and transmitting data under the control of the first processor 1104, specifically, Receive a downlink control channel.
  • the first processor 1104 is configured to read a program in the first memory 1105, and perform the following process: determining, according to the downlink control channel, a transmission location of the uplink demodulation reference signal DMRS.
  • the bus architecture (represented by the first bus 1100) can include any number of interconnected buses and bridges, the first bus 1100 will include one or more processors and firsts represented by the first processor 1104
  • the various circuits of the memory represented by memory 1105 are linked together.
  • the first bus 1100 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is well known in the art and, therefore, will not be further described herein.
  • the first bus interface 1103 provides an interface between the first bus 1100 and the first transceiver 1101.
  • the first transceiver 1101 can be one component or multiple components, such as multiple receivers and transmitters.
  • a transmitter that provides means for communicating with various other devices on a transmission medium.
  • the data processed by the first processor 1104 is transmitted over the wireless medium by the first transceiver 1101 and the first antenna 1102. Further, the first antenna 1102 also receives data and transmits the data to the first process via the first transceiver 1101. 1104.
  • the first processor 1104 is responsible for managing the first bus 1100 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the first memory 1105 can be used for data used by the first storage processor 1104 in performing operations.
  • the first processor 1104 can be a CPU, an ASIC, an FPGA, or a CPLD.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format
  • the first processor 1104 is further configured to: determine, according to the downlink control channel, a transmission location of a DMRS of the short physical uplink shared channel sPUSCH scheduled by the downlink control channel.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the first processor 1104 is further configured to: pre-define a downlink control channel scheduling using an uplink DCI format transmitted in a subframe numbered n or a short TTI to transmit in a time domain position of n+k+m1.
  • sPUSCH and the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m2 or the DMRS of the sPUSCH is transmitted in a time domain position of n+k+m1+m2; wherein k is pre-defined or pre-configured Or the value of the downlink control channel notification, m1, m2 is a value notified by the downlink control channel, and the units of k, m1, and m2 are subframes or short TTI or SC-FDMA symbols, and n is a natural number; or is defined in advance
  • the subframe numbered n or the downlink control channel transmitted in the short TTI using the uplink DCI format schedules the sPUSCH transmitted in the time domain position of n
  • the first processor 1104 is further configured to: pre-define a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a division of each short TTI in the time slot and a location of the DMRS, or each DMRS The pattern includes at least a relative positional relationship between the DMRS and the short TTI, and the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format.
  • the first processor 1104 is further configured to: determine, according to the downlink control channel, a transmission location of a DMRS that transmits an s PUCCH of ACK/NACK feedback information corresponding to the downlink control channel.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the first processor 1104 is further configured to: pre-define a downlink control channel scheduling using a downlink DCI format, which is transmitted in a subframe numbered n or a short TTI, to be transmitted in a time domain position of n+k+m1.
  • n is a natural number; or is defined in advance Subframe with number n or downlink DCI used for transmission in short TTI
  • the downlink control channel schedules the sPUCCH transmitted in the time domain position of n+k1+m1, and the DMRS of the sPUCCH is transmitted in the time domain position of n+k2+m2 or the DMRS of the sPUCCH is at n+k2+ M1+m2 is transmitted in
  • the unit of m2 is a subframe or a short TTI or SC-FDMA symbol, and n is a natural number; or a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI is pre-defined to be scheduled at n+k
  • the sPUCCH transmitted in the domain location, and the DMRS of the sPUCCH is transmitted in a time domain location of n+k+m2; wherein k is a value defined in advance or pre-configured or notified by the downlink control channel, and m2 is the downlink
  • the value of the control channel notification, the unit of k, m2 is a subframe or a short TTI or SC-FDMA symbol, and n is a natural number; a downlink control channel using a downlink DCI format transmitted in a subframe numbered n or a short TTI is defined in advance.
  • n is a natural number; or pre-defined in the subframe numbered n or short TTI, the downlink control channel scheduling using the downlink DCI format is transmitted in the time domain position of n+k sPUCCH, or sPUCCH scheduled to be transmitted in a time domain position of n+k+m, using a downlink control channel of a downlink DCI format transmitted in a subframe numbered n or a short TTI, where DMRS is indicated in the downlink control channel An index position,
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates DMRS in one slot/subframe. Specific location transfer.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal.
  • an embodiment of the present disclosure provides another structure of a base station.
  • the second transceiver 1201 receives and transmits data under the control of the second processor 1204. Specifically, the downlink control channel is sent, and the terminal is notified to determine information about the transmission location of the uplink DMRS.
  • the second processor 1204 is configured to read the program in the second memory 1205 and perform the following process: determining a transmission location of the uplink DMRS.
  • the bus architecture (represented by the second bus 1200) can include any number of interconnected buses and bridges, and the second bus 1200 will include one or more processors and seconds represented by the second processor 1204.
  • the various circuits of the memory represented by memory 1205 are linked together.
  • the second bus 1200 can also link various other circuits, such as peripherals, voltage regulators, and power management circuits, as is known in the art and, therefore, will not be further described herein.
  • the second bus interface 1203 provides an interface between the second bus 1200 and the second transceiver 1201.
  • the second transceiver 1201 can be an element or a plurality of elements, such as a plurality of receivers and transmitters, providing means for communicating with various other devices on a transmission medium.
  • the data processed by the second processor 1204 is transmitted over the wireless medium through the second transceiver 1201 and the second antenna 1202. Further, the second antenna 1202 also receives the data and transmits the data to the second processing via the second transceiver 1201. 1204.
  • the second processor 1204 is responsible for managing the second bus 1200 and the usual processing, and can also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions.
  • the second memory 1205 can be used for data used by the second storage processor 1204 in performing operations.
  • the second processor 1204 may be a CPU, an ASIC, an FPGA, or a CPLD.
  • the downlink control channel is a downlink control channel that uses an uplink DCI format.
  • the second processor 1204 is further configured to: determine a transmission location of the DMRS of the short physical uplink shared channel sPUSCH scheduled by the downlink control channel, and notify the terminal, by using the downlink control channel, to determine the DMRS. Information about the transfer location.
  • the sPUSCH and the DMRS use different scheduling timings.
  • the second processor 1204 is further configured to: pre-define a downlink control channel scheduling using an uplink DCI format transmitted in a subframe numbered n or a short TTI, to transmit in a time domain position of n+k+m1.
  • n is a natural number
  • k is predetermined Meaning or pre-configured or the value of the downlink control channel notification
  • m1, m2 are the values notified by the downlink control channel
  • the units of k, m1, and m2 are subframes or short TTI or SC-FDMA symbols
  • n is a natural number
  • the DMRS transmitted in the time domain location of +m2 or the sPUSCH is transmitted in a time domain position of n+k2+m1+m2;
  • the downlink control channel transmitted in the TTI using the uplink DCI format schedules the sPUSCH transmitted in the time domain position of n+k, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k+m2; wherein k is a pre- Defining or pre-configuring or the value of the downlink control channel notification, m2 is the downlink control The value of the channel notification, the unit of k, m2 is a subframe or a short TTI or SC-FDMA symbol, n is a natural number; or the downlink control using the uplink DCI format transmitted in a subframe numbered n or a short TTI is defined in advance.
  • the channel schedules the sPUSCH transmitted in the time domain position of n+k1, and the DMRS of the sPUSCH is transmitted in the time domain position of n+k2+m2; wherein k1, k2 are predefined or pre-configured or the downlink control
  • k1, k2 are predefined or pre-configured or the downlink control
  • the value of the channel notification, m2 is the value of the downlink control channel notification, the unit of k1, k2, m2 is a subframe or a short TTI or SC-FDMA symbol, n is a natural number; or is defined in advance in a subframe numbered n or
  • the downlink control channel transmitted in the short TTI using the uplink DCI format schedules the sPUSCH transmitted in the time domain position of n+k, or is defined in advance in the subframe of the number n or the short TTI and the downlink using the uplink DCI format.
  • the control channel schedules an sPUSCH transmitted in a time domain position of n+k+m, where the DMRS index position is indicated in the downlink control channel, where the DMRS index position is a subframe in which the sPUSCH transmission scheduled by the downlink control channel is located or SC-FDMA symbol number in the time slot;
  • k is a value defined in advance or pre-configured or notified by the downlink control channel
  • m is a value notified by the downlink control channel
  • units of k and m are subframes or short TTI or SC-FDMA symbols
  • n is a natural number .
  • the second processor 1204 is further configured to: pre-define a plurality of uplink DMRS patterns, where each DMRS pattern includes at least one sub-frame or a short TTI partition in a time slot, where the DMRS is located, or each DMRS The pattern contains at least the relative positional relationship between the DMRS and the short TTI.
  • the indication field in the downlink control channel indicates one of a plurality of predefined uplink DMRS patterns.
  • the downlink control channel is a downlink control channel that uses a downlink DCI format.
  • the second processor 1204 is further configured to: determine, by the base station, a transmission location of a DMRS of an s PUCCH that transmits ACK/NACK feedback information corresponding to the downlink control channel, and notify the terminal by using the downlink control channel Determining information of a transmission location of the DMRS.
  • the sPUCCH and the DMRS use different scheduling timings.
  • the second processor 1204 is further configured to: pre-define a downlink control channel scheduling using a downlink DCI format transmitted in a subframe numbered n or a short TTI to transmit in a time domain position of n+k+m1.
  • the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m2 or the DMRS of the sPUCCH is transmitted in a time domain position of n+k+m1+m2; wherein k is pre-defined or pre-configured Or the value of the downlink control channel notification, m1, m2 is a value notified by the downlink control channel, and the unit of k, m1, m2 may be a subframe or a short TTI or SC-FDMA symbol; or predefined in the number n a sub-frame or a downlink control channel transmitted in a short TTI using a downlink DCI format to schedule an sPUCCH transmitted in a time domain position of n+k1+m1, and the DMRS of the sPUCCH is in a time domain position of n+k2+m2 Transmitting or transmitting the DMRS of the sPUCCH in a time domain position of n+
  • a downlink control channel of a downlink DCI format transmitted in a subframe numbered n or a short TTI where DMRS is indicated in the downlink control channel
  • An index position, where the DMRS index position is an SC-FDMA symbol number in a subframe or a slot in which the sPUCCH transmission corresponding to the downlink control channel is located; wherein k is a predefined or pre-configured or the downlink control channel notification
  • m is the value of the downlink control channel notification
  • the unit of k and m is a subframe or a short TTI or SC-FDMA symbol
  • n is a natural number.
  • multiple uplink short TTI transmissions share the same time domain location transmission DMRS, and the downlink control channel indicates that the DMRS is in a specific location of one slot/subframe. transmission.
  • the downlink control channel indicates that the DMRS is transmitted between multiple uplink short TTIs scheduled by the terminal.
  • system and “network” are used interchangeably herein.
  • B corresponding to A means that B is associated with A, and B can be determined from A.
  • determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
  • the disclosed method and apparatus may In other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may be physically included separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium.
  • the above software functional unit is stored in a storage medium and includes a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network side device, etc.) to perform part of the steps of the transceiving method of the various embodiments of the present disclosure.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, and the program code can be stored. Medium.

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US16/322,908 US10932246B2 (en) 2016-08-04 2017-07-05 Methods and devices for dynamically determining transmission locations of UL DMRS
KR1020197005405A KR102221136B1 (ko) 2016-08-04 2017-07-05 업링크 dmrs의 전송 위치를 동적으로 확정하는 방법 및 기기
EP17836250.5A EP3496481B1 (en) 2016-08-04 2017-07-05 Methods and devices for dynamically determining transmission locations of ul dmrs
JP2019505470A JP7097349B2 (ja) 2016-08-04 2017-07-05 上りｄｍｒｓの伝送位置を動的に決定するための方法及び装置
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