WO2017020578A1 - Procédé d'envoi d'instructions de srs, procédé et dispositif d'émission de srs - Google Patents

Procédé d'envoi d'instructions de srs, procédé et dispositif d'émission de srs Download PDF

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Publication number
WO2017020578A1
WO2017020578A1 PCT/CN2016/074202 CN2016074202W WO2017020578A1 WO 2017020578 A1 WO2017020578 A1 WO 2017020578A1 CN 2016074202 W CN2016074202 W CN 2016074202W WO 2017020578 A1 WO2017020578 A1 WO 2017020578A1
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WO
WIPO (PCT)
Prior art keywords
srs
frequency band
terminal device
downlink
subframe
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Application number
PCT/CN2016/074202
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English (en)
Chinese (zh)
Inventor
王瑜新
鲁照华
陈艺戬
李儒岳
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Publication of WO2017020578A1 publication Critical patent/WO2017020578A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • a physical downlink control channel (PDCCH) is used to carry uplink and downlink scheduling information, and uplink power control information.
  • Downlink Control Information (DCI) format is divided into DCI format 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, etc., and later evolved to LTE-A version 12 ( DCI formats 2B, 2C, and 2D have been added to LTE-A Release 12 to support a variety of different applications and transmission modes.
  • DCI Downlink Control Information
  • the Sounding Reference Signal is a signal used by a terminal device and a base station to measure channel state information (CSI).
  • the UE periodically transmits the uplink SRS on the last data symbol of the transmission subframe according to parameters such as the frequency band indicated by the eNB, the frequency domain location, the sequence cyclic shift, the period, and the subframe offset.
  • the eNB determines the uplink CSI of the UE according to the received SRS, and performs operations such as frequency domain selection scheduling, closed loop power control, and the like according to the obtained CSI.
  • non-precoded SRS should be used, namely: antenna-specific SRS, and PUSCH for demodulation.
  • the reference signal (De Modulation Reference Signal, DMRS for short) is precoded.
  • the base station can estimate the original CSI of the uplink by receiving the non-precoded SRS, and the pre-coded DMRS cannot enable the base station to estimate the original CSI of the uplink.
  • the UE transmits the non-precoded SRS using multiple antennas the SRS resources required by each UE increase, This has resulted in a decrease in the number of UEs that can be simultaneously multiplexed in the system.
  • the method further includes: receiving capability information of the terminal device from an uplink frequency band, where the capability information is used to indicate whether the terminal device has the capability of transmitting the SRS on the downlink frequency band.
  • a method for transmitting an SRS including: receiving, by a terminal device, configuration information for instructing a terminal device to send an SRS in a downlink frequency band or a preset frequency band, where the preset frequency band is And including: a frequency band other than a frequency band occupied by the uplink transmission used by the terminal device; and sending the SRS on the downlink frequency band or the preset frequency band according to the configuration information.
  • the configuration information includes at least one of the following: configuration information of the uplink and downlink, configuration information of the subframe group, and a transmission parameter of the SRS configured in the downlink frequency band or configured in the downlink control signaling.
  • the sending parameter of the SRS configured on the downlink frequency band includes: a sending period of the SRS configured on the downlink frequency band; and the sending parameter configured in the downlink control signaling includes: configuring the downlink control signal The request field of the SRS in the order, or the information used to indicate the SRS transmission in the downlink control signaling.
  • the foregoing sending parameter of the SRS configured on the downlink frequency band includes at least one of: cyclic shift information, frequency domain location information, user-specific bandwidth, frequency comb location information, and SRS bandwidth configuration information.
  • the downlink control signaling includes one of the following: DCI format 2B, DCI format 2C, DCI format 2D, DCI format 2E, and DCI format 2F.
  • the radio frame structure of the uplink and downlink configuration indication includes one or two special subframes, where the next subframe of the special subframe is a downlink subframe.
  • the special subframe is located at one or two of the following subframe numbers: subframe number 0, subframe number 1, subframe number 2, subframe number 5, subframe number 6, subframe No. 9.
  • an apparatus for instructing an SRS including: a generating module, configured to generate configuration information for instructing a terminal device to send an SRS in a downlink frequency band or a preset frequency band, where The preset frequency band includes: a frequency band other than a frequency band occupied by the uplink transmission used by the terminal device; and a sending module configured to send the configuration information to the terminal device.
  • the apparatus further includes: a receiving module, configured to receive capability information of the terminal device from an uplink frequency band, where the capability information is used to indicate whether the terminal device has the capability of transmitting the SRS on the downlink frequency band.
  • a receiving module configured to receive capability information of the terminal device from an uplink frequency band, where the capability information is used to indicate whether the terminal device has the capability of transmitting the SRS on the downlink frequency band.
  • the device further includes: a second sending module, configured to send the capability information of the terminal device to the sender of the configuration information, where the capability information is used to indicate whether the terminal device is configured to send on the downlink frequency band The ability of the above SRS.
  • a second sending module configured to send the capability information of the terminal device to the sender of the configuration information, where the capability information is used to indicate whether the terminal device is configured to send on the downlink frequency band The ability of the above SRS.
  • the terminal device sends the capability information of the terminal device to the sender of the configuration information, where the capability information is used to indicate whether the terminal device has the capability of transmitting the SRS on the downlink frequency band.
  • the sending parameter of the SRS configured on the downlink frequency band includes: a sending period of the SRS configured in the downlink frequency band; the sending parameter configured in the downlink control signaling includes: a request for the SRS configured in the downlink control signaling A domain, or information configured in the downlink control signaling for indicating SRS transmission.
  • the radio frame structure indicated by the uplink and downlink configuration includes one or two special subframes, where the next subframe of the special subframe is a downlink subframe.
  • a SRS transmission system is further provided, and the system includes: the SRS indication transmitting device and the SRS transmitting device.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple At In the processor.
  • Embodiments of the present invention also provide a storage medium.
  • the above storage medium may be configured to store program code for performing the following steps:
  • S400 Send configuration information to the terminal device.
  • the terminal device receives configuration information for instructing the terminal device to send an SRS in a downlink frequency band or a preset frequency band, where the preset frequency band includes: a frequency band other than a frequency band occupied by uplink transmission for the terminal device;
  • S800 Send an SRS in a downlink frequency band or a preset frequency band according to the configuration information.
  • n f is the system frame number
  • k SRS is the subframe index
  • T offset is the SRS subframe offset
  • T SRS is the SRS period
  • T SRS is greater than or equal to 2 milliseconds
  • the base station sends configuration information of the SRS to the user terminal, where the configuration information includes: information for indicating that the terminal device sends the SRS on the downlink frequency band, where the terminal device is configured to instruct the terminal device to send the SRS on the downlink frequency band.
  • Information including: an SRS transmission period configured on a downlink frequency band;
  • the base station before setting the configuration information of the SRS, the base station receives the capability information of the terminal device that is sent by the terminal device, where the capability information is used to indicate whether the terminal device has the capability of transmitting the SRS or the uplink data on the downlink frequency band.
  • the base station may configure the SRS transmission period on the downlink frequency band to the terminal device, and at the same time, the frame structure on the downlink frequency band is correspondingly Adjusted to include the frame structure of a special sub-frame.
  • the SRS transmission period is 2 milliseconds or 5 milliseconds, it indicates that each radio frame on the downlink frequency band includes two special subframes, and the terminal device transmits the SRS in the uplink pilot time slot of the special subframe; when the SRS transmission period is At 10 milliseconds, it indicates that each radio frame on the downlink frequency band includes one special subframe, and the terminal device transmits the SRS in the uplink pilot time slot of the special subframe.
  • the transmission method of the measurement reference signal provided in the preferred embodiment is implemented by a system including a base station and a user terminal (corresponding to the above-mentioned terminal device).
  • the base station sets the configuration information of the SRS, and sends the configuration information of the SRS to the terminal device.
  • the configuration information includes: information used to indicate that the terminal device sends the SRS in the downlink frequency band;
  • the information indicating the SRS transmission in the downlink control signaling includes: the downlink control signaling is related to the DCI format 2B or the DCI format 2C or the DCI format 2D in the LTE-A Release 12 or is added to the subsequent evolved version of the LTE-A.
  • the uplink and downlink configuration information includes: one or two special subframes in the radio frame structure information of the uplink and downlink configuration indication, where the next subframe of the special subframe is a downlink subframe. ;
  • the configuration information of the subframe group includes a subframe group 1 and a subframe group 2, or a subframe set 1 and a subframe set 2;
  • the subframe in which the DCI signaling sent by the SRS is triggered is in the subframe group 1 or the subframe set 1, it indicates that the triggered SRS is sent in the downlink frequency band; when the subframe in which the DCI signaling triggered by the SRS is triggered is in the subframe group 2 or subframe set 2 indicates that the triggered SRS is transmitted in the uplink frequency band.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described, or separate them into individual integrated circuit modules, or make multiple modules or steps into a single The integrated circuit module is implemented. Thus, the invention is not limited to any specific combination of hardware and software.

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

Abstract

La présente invention concerne un procédé d'envoi d'instructions de SRS, un procédé et un dispositif d'émission de SRS, le procédé d'envoi d'instructions de SRS comportant les étapes consistant à: générer des informations de configuration servant à donner pour consigne à un dispositif de terminal d'émettre un SRS sur une bande de fréquences de liaison descendante ou une bande de fréquences prédéfinie, la bande de fréquences prédéfinie comportant une bande de fréquences autre qu'une bande de fréquences occupée pour l'émission en liaison montante du dispositif de terminal; et envoyer les informations de configuration au dispositif de terminal. La présente invention résout le problème du gaspillage des surcharges de ressources pilotes en liaison descendante et des surcharges de rétroaction de terminal dans un système massivement MIMO en FDD, diminuant les surcharges de ressources pilotes en liaison descendante et la quantité de rétroaction du terminal.
PCT/CN2016/074202 2015-07-31 2016-02-22 Procédé d'envoi d'instructions de srs, procédé et dispositif d'émission de srs WO2017020578A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510466487.7 2015-07-31
CN201510466487.7A CN106411375B (zh) 2015-07-31 2015-07-31 Srs的指示发送方法、srs的发送方法和装置

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CN106411375B (zh) 2021-06-15

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