WO2017049988A1 - Procédé et dispositif d'émission et de réception de données - Google Patents

Procédé et dispositif d'émission et de réception de données Download PDF

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Publication number
WO2017049988A1
WO2017049988A1 PCT/CN2016/088670 CN2016088670W WO2017049988A1 WO 2017049988 A1 WO2017049988 A1 WO 2017049988A1 CN 2016088670 W CN2016088670 W CN 2016088670W WO 2017049988 A1 WO2017049988 A1 WO 2017049988A1
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Prior art keywords
subframe format
short subframe
short
occupied
equal
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PCT/CN2016/088670
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English (en)
Chinese (zh)
Inventor
司倩倩
潘学明
徐伟杰
王加庆
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电信科学技术研究院
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Publication of WO2017049988A1 publication Critical patent/WO2017049988A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a data transmission and reception method and apparatus.
  • the LTE (Long Term Evolution) system will support the deployment of transmissions on unlicensed spectrum resources to improve user experience and extend coverage.
  • a DRS discovery reference signal
  • the LTE system has determined that a DMTC (discovery measurement timing configuration) window is configured for the user on the unlicensed spectrum, and the base station transmits the DRS in the DMTC window, and the user can detect the DRS signal in this time window.
  • DMTC discovery measurement timing configuration
  • the shortcoming of the prior art is that if the existing data transmission method is used, the downlink data and the demodulation pilot and the DRS cannot be multiplexed and transmitted in the DMTC window.
  • the invention provides a data transmitting and receiving method and device. It is used to support downlink data and DRS multiplex transmission in the DMTC window.
  • a data receiving method is provided in the embodiment of the present invention, including:
  • Data reception and detection are performed in a short subframe format in the DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where N is greater than or equal to 1 The integer.
  • the pilot pattern transmitted in the short subframe format is a demodulation pilot pattern defined by the TDD system in the special subframe.
  • a demodulation pilot pattern corresponding to 3/4/8/9 is configured in a special subframe under a normal CP
  • the demodulation pilot pattern corresponding to 1/2/6/7 is configured in a special subframe under the normal CP.
  • the method further comprises:
  • the TBS size of the transmission is determined according to the number of OFDM symbols occupied by the short subframe format.
  • determining the TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format including:
  • a data sending method is provided in the embodiment of the present invention, including:
  • Data transmission is performed in a short subframe format in the DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where N is an integer greater than or equal to 1. .
  • the pilot pattern transmitted in the short subframe format is a demodulation pilot pattern defined by the TDD system in the special subframe.
  • a demodulation pilot pattern corresponding to 3/4/8/9 is configured in a special subframe under a normal CP
  • the demodulation pilot pattern corresponding to 1/2/6/7 is configured in a special subframe under the normal CP.
  • the method further comprises:
  • the TBS size of the transmission is determined according to the number of OFDM symbols occupied by the short subframe format.
  • determining the TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format including:
  • An embodiment of the present invention provides a data receiving apparatus, including:
  • Configuring a receiving module configured to receive configuration information sent by the network side
  • a window determining module configured to determine a DMTC window according to the configuration information
  • a data receiving module configured to perform data reception and detection according to a short subframe format in a DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where N is an integer greater than or equal to 1.
  • the data receiving module is further configured to transmit a demodulation pilot pattern defined by the TDD system in the special subframe when the pilot pattern is transmitted in the short subframe format.
  • the data receiving module is further configured to: if the number M of symbols occupied by the short subframe format is less than or equal to 3, use a demodulation guide corresponding to the special subframe configuration 3/4/8/9 under the normal CP. a frequency pattern; if the number M of symbols occupied by the short subframe format is greater than 3 and less than or equal to 7, the special subframe configuration 1/2/6/7 corresponding to the conventional CP is used. Demodulation pilot pattern.
  • the data receiving module is further configured to determine a TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format.
  • the data receiving module is further configured to determine, according to the N′ PRB *q and the MCS level notified by the base station, the TBS size of the transmission when determining the TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format, where q is a preset adjustment coefficient, q is greater than 0 and less than or equal to 1, and the N' PRB is the number of PRBs occupied by the transport block in the short subframe format notified by the base station.
  • An embodiment of the present invention provides a data sending apparatus, including:
  • Configuring a sending module configured to send configuration information of the DMTC window to the terminal side
  • a data sending module configured to perform data transmission according to a short subframe format in a DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where N is An integer greater than or equal to 1.
  • the data sending module is further configured to transmit the demodulation pilot pattern defined by the TDD system in the special subframe when the pilot pattern is transmitted in the short subframe format.
  • the data sending module is further configured to: if the number M of symbols occupied by the short subframe format is less than or equal to 3, use a demodulation guide corresponding to the special subframe configuration 3/4/8/9 under the normal CP. If the number of symbols M occupied by the short subframe format is greater than 3 and less than or equal to 7, the demodulation pilot pattern corresponding to 1/2/6/7 is configured in a special subframe under the normal CP.
  • the data receiving module is further configured to determine a TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format.
  • the data receiving module is further configured to determine, according to the N′ PRB *q and the MCS level notified by the base station, the TBS size of the transmission when determining the TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format, where q is a preset adjustment coefficient, q is greater than 0 and less than or equal to 1, and the N' PRB is the number of PRBs occupied by the transport block in the short subframe format notified by the base station.
  • the data of the subframe data transmitted in the DMTC window is transmitted, received, and detected according to the short subframe format, and is transmitted in the subframe in the short subframe format.
  • the data does not occupy the last N OFDM symbols in the subframe, but since the DMTC window is used to transmit DRS, and the last N symbols of the DRS subframe need to be reserved for LBT, it can support downlink data and DRS in the DMTC window. Multiplexed transmissions.
  • FIG. 1 is a schematic flowchart of implementing a data receiving method on a terminal side according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of implementing a data sending method on a network side according to an embodiment of the present invention
  • 3a, 3b, and 3c are DMRS mapping diagrams of antenna ports 7, 8, 9, and 10 in the embodiment of the present invention, and a schematic diagram of a conventional CP;
  • FIG. 4 is a DMRS mapping diagram of antenna ports 7, 8, 9, and 10 in multiplex transmission according to an embodiment of the present invention, and a schematic diagram of a conventional CP;
  • FIG. 5 is a schematic structural diagram of a data receiving apparatus according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a data transmitting apparatus according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station needs to perform LBT (listen before Talk) before sending the DRS. Therefore, in the DMTC window The last one or more symbols of each subframe within the frame are idle, and the base station does not send any signal.
  • the existing data transmission method is used. Downlink data and demodulation pilots and DRS cannot be multiplexed in the DMTC window.
  • a downlink data transmission scheme on an unlicensed carrier is provided to support downlink data and DRS multiplex transmission in the DMTC window.
  • the following description will be made.
  • FIG. 1 is a schematic flowchart of a method for implementing data receiving on a terminal side, as shown in the figure, which may include:
  • Step 101 Receive configuration information sent by a network side.
  • Step 102 Determine a DMTC window according to the configuration information.
  • FIG. 2 is a schematic flowchart of an implementation process of a data sending method on a network side, as shown in the figure, which may include:
  • Step 201 Send configuration information of the DMTC window to the terminal side.
  • Step 202 Perform data transmission in a short subframe format in a DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where N is greater than or equal to An integer of 1.
  • the pilot pattern transmitted in the short subframe format is a demodulation pilot pattern defined by the TDD system in the special subframe.
  • a demodulation pilot pattern corresponding to 3/4/8/9 is configured in a special subframe under a normal CP
  • the demodulation pilot pattern defined by the TDD system in the special subframe may be used in the short subframe format. If N is less than or equal to 3, the special subframe configuration under the normal CP (Cyclic Prefix) may be used. /4/8/9 corresponding demodulation pilot pattern; if N is greater than 3 and less than or equal to 7, the demodulation pilot pattern corresponding to 1/2/6/7 can be configured using the special subframe under the normal CP.
  • it may further include:
  • the TBS size of the transmission is determined according to the number of OFDM symbols occupied by the short subframe format.
  • determining the TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format including:
  • the terminal selects a TBS (Transport Block Set) size to be transmitted according to the number of occupied OFDM symbols in the short subframe format.
  • the adjustment coefficient q is predefined, according to N′ PRB * q and the MCS (Modulation and Coding Scheme) level notified by the base station in the protocol 36.213 to determine the TBS used, where q is greater than 0 and less than or equal to 1, and the N' PRB is occupied by the transport block notified by the base station.
  • the number of PRBs is referred to determine the TBS used.
  • FDD Frequency Division Duplex
  • TDD Time Division Duplex
  • time division duplex mode is a radio frame of 10ms and a subframe of 1ms.
  • D represents a DL (Down Link) subframe
  • U represents a UL (Up-Link) subframe.
  • S represents a special subframe of the TDD system
  • the special subframe includes a DwPTS (Downlink Pilot Time Slot), a GP (Guard Period), and an UpPTS (Uplink Pilot Time Slot).
  • DwPTS Downlink Pilot Time Slot
  • GP Guard Period
  • UpPTS Uplink Pilot Time Slot
  • Table 1 TDD uplink and downlink configuration
  • the DRS in each subframe occupies 12 OFDM symbols for data transmission, and the last two OFDM are idle.
  • the DRS in each subframe includes CRS (Cell-specific reference signals), CSI-RS (channel state information reference signal), and symbols 5 and 6 are transmitted.
  • CRS Cell-specific reference signals
  • CSI-RS channel state information reference signal
  • SSS Secondary Synchronization Signal
  • PSS Primary Synchronization Signal
  • FIG. 4 is a DMRS map of the antenna ports 7, 8, 9, and 10 in the multiplex transmission.
  • PRB/EPDCCH Enhanced Physical Downlink Control Channel
  • PRB/EPDCCH Enhanced Physical Downlink Control Channel
  • 3/4/8/9 Demodulation pilot pattern, PDCCH (physical downlink control channel) is transmitted in symbol 0 and symbol 1
  • PDSCH or EPDCCH is transmitted in symbols 2-11.
  • the terminal side first obtains the DMTC window configuration information according to the configuration information of the network side base station, determines which subframes are located in the DMTC window, and only receives the data information in the first 12 OFDM symbols in the subframes, and then configures according to the special subframe 3/.
  • the demodulation pilot pattern corresponding to 4/8/9 determines the pilot position and performs channel estimation and demodulation.
  • the terminal When determining the TBS size, assuming that the predefined adjustment coefficient q is 0.75, the terminal first determines the N' PRB and MCS levels according to the DCI (Downlink Control Information) notified by the base station, and then uses N' PRB *0.75 and MCS. The level is determined in the protocol 36.213 to determine the TBS used.
  • DCI Downlink Control Information
  • the DRS pattern in the DMTC window may be different from the above definition, but as long as there are idle N OFDM symbols at the end, the above scheme can be used to support DRS and data and solutions.
  • the multiplexed transmission of the pilot frequency may be used to support DRS and data and solutions.
  • the configuration information of the DMTC window is sent to the terminal, and the downlink data is transmitted in the short subframe format in the subframes in the DMTC window.
  • the demodulation pilot pattern and the TBS determination method used in the short subframe format are consistent with the terminal side, and will not be described again.
  • an embodiment of the present invention further provides a data receiving device and a data transmitting device.
  • the principle of solving the problem is similar to a data receiving method and a data transmitting method.
  • Implementation can refer to the implementation of the method, and the repetition will not be repeated.
  • FIG. 5 is a schematic structural diagram of a data receiving apparatus, as shown in the figure, including:
  • the receiving module 501 is configured to receive configuration information sent by the network side.
  • a window determining module 502 configured to determine a DMTC window according to the configuration information
  • the data receiving module 503 is configured to perform data reception and detection according to a short subframe format in a DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, Where N is an integer greater than or equal to 1.
  • the data receiving module is further configured to: when the pilot pattern is transmitted in the short subframe format, transmit a demodulation pilot pattern defined by the TDD system in the special subframe.
  • the data receiving module is further configured to: if the number M of symbols occupied by the short subframe format is less than or equal to 3, use a demodulation pilot corresponding to a special subframe configuration 3/4/8/9 under a normal CP. If the number of symbols M occupied by the short subframe format is greater than 3 and less than or equal to 7, the demodulation pilot pattern corresponding to 1/2/6/7 is configured in a special subframe under the normal CP.
  • the data receiving module is further configured to determine a TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format.
  • the data receiving module is further configured to determine, according to the N′ PRB *q and the MCS level notified by the base station, the TBS size of the transmission when determining the TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format, where q is a preset adjustment coefficient, q is greater than 0 and less than or equal to 1, and the N' PRB is the number of PRBs occupied by the transport block in the short subframe format notified by the base station.
  • FIG. 6 is a schematic structural diagram of a data transmitting apparatus, as shown in the figure, including:
  • the sending module 601 is configured to send configuration information of the DMTC window to the terminal side;
  • the data sending module 602 is configured to perform data transmission according to the short subframe format in the DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where Is an integer greater than or equal to 1.
  • the data sending module is further configured to transmit a demodulation pilot pattern defined by the TDD system in the special subframe when the pilot pattern is transmitted in the short subframe format.
  • the data sending module is further configured to: if the number M of symbols occupied by the short subframe format is less than or equal to 3, use a demodulation pilot corresponding to a special subframe configuration 3/4/8/9 under a normal CP. If the number of symbols M occupied by the short subframe format is greater than 3 and less than or equal to 7, the demodulation pilot pattern corresponding to 1/2/6/7 is configured in a special subframe under the normal CP.
  • the data receiving module is further configured to determine a TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format.
  • the data receiving module is further configured to determine, according to the N′ PRB *q and the MCS level notified by the base station, the TBS size of the transmission when determining the TBS size of the transmission according to the number of OFDM symbols occupied by the short subframe format, where q is a preset adjustment coefficient, q is greater than 0 and less than or equal to 1, and the N' PRB is the number of PRBs occupied by the transport block in the short subframe format notified by the base station.
  • FIG. 7 is a schematic structural diagram of a terminal. As shown in the figure, the terminal includes:
  • the processor 700 is configured to read a program in the memory 720 and perform the following process:
  • the transceiver 710 is configured to send data under the control of the processor 700, and performs the following processes:
  • Data reception and detection are performed in a short subframe format in the DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where N is greater than or equal to 1 of Integer.
  • the pilot pattern transmitted in the short subframe format is a demodulation pilot pattern defined by the TDD system in the special subframe.
  • a demodulation pilot pattern corresponding to 3/4/8/9 is configured in a special subframe under a normal CP
  • the demodulation pilot pattern corresponding to 1/2/6/7 is configured in a special subframe under the normal CP.
  • it further includes:
  • the TBS size of the transmission is determined according to the number of OFDM symbols occupied by the short subframe format.
  • the processor 700 is responsible for managing the bus architecture and general processing, and the memory 720 can store data used by the processor 700 in performing operations.
  • FIG. 8 is a schematic structural diagram of a base station, as shown in the figure, the base station includes:
  • the processor 800 is configured to read a program in the memory 820 and perform the following process:
  • the transceiver 810 is configured to send data under the control of the processor 800, and performs the following processes:
  • Data transmission is performed in a short subframe format in the DMTC window, where the short subframe format indicates that the last N OFDM symbols in the subframe are not occupied in the subframe for data transmission, where N is an integer greater than or equal to 1. .
  • the pilot pattern transmitted in the short subframe format is a demodulation pilot pattern defined by the TDD system in the special subframe.
  • the demodulation pilot pattern corresponding to 1/2/6/7 is configured in a special subframe under the normal CP.
  • it further includes:
  • the TBS size of the transmission is determined according to the number of OFDM symbols occupied by the short subframe format.
  • the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 800 and various circuits of memory represented by memory 820.
  • the bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein.
  • the bus interface provides an interface.
  • Transceiver 810 can be a plurality of components, including a transmitter and a transceiver, providing means for communicating with various other devices on a transmission medium.
  • the processor 800 is responsible for managing the bus architecture and general processing, and the memory 820 can store data used by the processor 800 in performing operations.
  • a scheme for transmitting data and demodulating pilots using a short subframe format in a DMTC window is provided. Further, a data transmission scheme within the DMTC window on the unlicensed carrier is also provided.
  • the downlink data transmission scheme on the unlicensed carrier can support the multiplexed transmission of the downlink data and the DRS in the DMTC window.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory include instructions.
  • the instruction means implements the functions specified in a block or blocks of a flow or a flow and/or a block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

L'invention concerne un procédé et un dispositif d'émission et de réception de données, consistant : à déterminer une fenêtre de configuration de synchronisattion de mesure de découverte (DMTC) en fonction des informations de configuration ; et à émettre, recevoir et détecter des données dans un format de sous-trame court dans la fenêtre de configuration de synchronisation de mesure de découverte, le format de sous-trame court représentant le fait que les derniers N signaux de multiplexage par répartition orthogonale de la fréquence (MROF) dans la sous-trame ne sont pas occupés dans la sous-trame pour l'émission de données, N étant un nombre entier supérieur ou égal à 1. La présente invention peut prendre en charge la transmission par multiplexage de données de liaison descendante et d'un signal de référence de découverte dans la fenêtre de configuration de synchronisation de mesure de découverte.
PCT/CN2016/088670 2015-09-25 2016-07-05 Procédé et dispositif d'émission et de réception de données WO2017049988A1 (fr)

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