WO2020029987A1 - Procédé et dispositif de transmission de données - Google Patents

Procédé et dispositif de transmission de données Download PDF

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Publication number
WO2020029987A1
WO2020029987A1 PCT/CN2019/099546 CN2019099546W WO2020029987A1 WO 2020029987 A1 WO2020029987 A1 WO 2020029987A1 CN 2019099546 W CN2019099546 W CN 2019099546W WO 2020029987 A1 WO2020029987 A1 WO 2020029987A1
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WIPO (PCT)
Prior art keywords
modulation
data
computer program
coding strategy
overload
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PCT/CN2019/099546
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English (en)
Chinese (zh)
Inventor
戴胜辰
王坚
张华滋
李榕
王俊
马江镭
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华为技术有限公司
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Publication of WO2020029987A1 publication Critical patent/WO2020029987A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • H04L1/0016—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy involving special memory structures, e.g. look-up tables

Definitions

  • Embodiments of the present application relate to the field of communications technologies, and in particular, to a data transmission method and device.
  • Non-orthogonal Multiple Access (NoMA) technology can effectively increase network capacity and is the fifth generation (5G) mobile communication
  • 5G fifth generation
  • the principle of NoMA technology is mainly to superimpose M data streams of one or more users on N subcarriers for transmission, where M and N are integers greater than 1.
  • M and N are integers greater than 1.
  • M and N are integers greater than 1.
  • M is greater than N
  • This type of technology can effectively increase network capacity, mainly reflected in the system's accessible users. Increase in frequency and increase spectrum efficiency.
  • NoMA technology is different from the existing OMA technology, so the modulation and coding strategy (MCS) for data transmission for OMA is not applicable. Therefore, it is urgent to present a data transmission method suitable for NoMA technology. .
  • MCS modulation and coding strategy
  • the embodiments of the present application provide a data transmission method and device to provide a data transmission method for multi-user transmission.
  • an embodiment of the present application provides a data transmission method, including:
  • the sending device obtains a modulation and coding strategy in an MCS table according to a modulation and coding strategy MCS index, and the modulation and coding strategy includes: a modulation order, a code rate, and an overload indication; wherein the code rate is used to encode data and the modulation The order is used to modulate the encoded data, and the overload indication is used to indicate overload information used by the transmitting device and the receiving device for data transmission;
  • the overload information may be, for example, the number of spatial sublayers, or may be used for The number of REs included in the resource unit carrying the spatial sublayer, or may be a value obtained by calculating the number of spatial sublayers and the number of REs;
  • the sending device performs code modulation on data according to the modulation and coding strategy to obtain coded data
  • the sending device sends the coded and modulated data to a receiving device.
  • an embodiment of the present application provides a data transmission method, including:
  • the receiving device receives data sent by the sending device
  • the receiving device obtains a modulation and coding strategy from an MCS table according to a modulation and coding strategy MCS index corresponding to the data, where the modulation and coding strategy includes: a modulation order, a code rate, and an overload indication; wherein the modulation order is used Demodulate data, the bit rate is used to decode the data, and the overload indication is used to indicate the overload information used by the sending device and the receiving device for data transmission;
  • the receiving device performs demodulation and decoding on the data according to the modulation and coding strategy to obtain demodulated and decoded data.
  • an embodiment of the present application provides a sending device, including:
  • a processing module configured to obtain a modulation and coding strategy in an MCS table according to a modulation and coding strategy MCS index, where the modulation and coding strategy includes a modulation order, a bit rate, and an overload indication, where the overload indication is used to instruct the sending device Overload information for data transmission with the receiving device;
  • the processing module is further configured to perform data coding and modulation on data according to the modulation and coding strategy to obtain coded and modulated data;
  • a sending module configured to send the coded and modulated data to a receiving device.
  • an embodiment of the present application provides a receiving device, including:
  • a receiving module configured to receive data sent by a sending device
  • a processing module configured to obtain a modulation and coding strategy in an MCS table according to a modulation and coding strategy MCS index corresponding to the data, where the modulation and coding strategy includes a modulation order, a bit rate, and an overload indication, where the overload indication is used for Overload information indicating that the sending device and the receiving device are used for data transmission;
  • the processing module is further configured to demodulate and decode the data according to the modulation and coding strategy to obtain demodulated and decoded data.
  • the overload information is a constraint relationship between the number of space sublayers used to transmit data and the number of resource particles included in the resource unit carrying the space sublayer.
  • the constraint relationship may be A value obtained by performing a calculation between the number of spatial sublayers L and the number of resource particles F in the resource unit through a preset function, and the value can be understood as an overload indicator (OI).
  • the MCS table has a corresponding relationship with the number of active devices.
  • the active device may be an active terminal device.
  • the modulation and coding strategy further includes: spectral efficiency; wherein, in the MCS table, the overload indication has a corresponding relationship with the spectral efficiency; for example, the corresponding relationship may be: The overload indication remains unchanged or decreases as the spectral efficiency increases; or, different spectral efficiency corresponds to the same overload indication.
  • the modulation and coding strategy further includes: the number of REs included in the resource unit; wherein, in the MCS table, the number of resource particles included in the resource unit is different from the number of REs included in the resource unit.
  • the spectral efficiency has a corresponding relationship.
  • the corresponding relationship may be that the number of resource particles included in the resource unit remains unchanged or increases with the increase of the spectral efficiency.
  • the overload indicator has a corresponding relationship with the number of active devices.
  • the corresponding relationship may be: for the same spectrum efficiency in different MCS tables, the overload indicator varies with the number of active devices. The increase in quantity remains unchanged or decreases.
  • the modulation and coding strategy further includes: the number of REs included in the resource unit;
  • the number of REs included in the resource unit has a corresponding relationship with the number of active devices.
  • the corresponding relationship may be: for the same spectrum efficiency in different MCS tables, the number of REs included in the resource unit varies with The increase in the number of active devices remains the same or increases.
  • a product of each overload indication and a corresponding modulation order is constant.
  • the number of resource particles RE included in the resource unit is a preset number.
  • the overload indicator can also be called an overloading parameter (loading parameter), a load indicator (loading indicator), a load parameter (loading parameter or load parameter), preset overload, preset Load, optimal load, optimal overload, overload information, load information, overload ratio, load ratio, number of sublayers per RE bearer space, bearer indication, preset bearer, bearer parameters, bearer information, etc.
  • This patent does not limit the name of the overload indication, as long as it has the same meaning as the overload indication.
  • the overload indication expresses the configuration mode of data transmission and reception when non-orthogonal multiple access is agreed upon by the transmitting device and the receiving device.
  • an embodiment of the present application provides a sending device, including: a memory, a processor, and a computer program.
  • the computer program is stored in the memory, and the processor runs the computer program to execute the first aspect and the foregoing.
  • an embodiment of the present application provides a receiving device, including: a memory, a processor, and a computer program.
  • the computer program is stored in the memory, and the processor runs the computer program to execute the second aspect and the foregoing.
  • an embodiment of the present application provides a storage medium, where the storage medium includes a computer program, and the computer program is configured to implement the data transmission method according to the first aspect and various possible designs of the first aspect.
  • an embodiment of the present application provides a storage medium, where the storage medium includes a computer program, and the computer program is configured to implement the data transmission method according to the second aspect and various possible designs of the second aspect.
  • an embodiment of the present application provides a computer program product, where the computer program product includes computer program code, and when the computer program code is run on a computer, the computer is caused to execute the first aspect and various aspects of the first aspect. Possible design of the described data transmission method.
  • an embodiment of the present application provides a computer program product, where the computer program product includes computer program code, and when the computer program code runs on a computer, the computer causes the computer to execute the second aspect and various aspects of the second aspect. Possible design of the described data transmission method.
  • an embodiment of the present application provides a chip including a memory and a processor, where the memory is configured to store a computer program, and the processor is configured to call and run the computer program from the memory, and execute the first
  • the data transmission method according to one aspect and various possible designs of the first aspect.
  • an embodiment of the present application provides a chip, including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, and execute the first
  • a chip including a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, and execute the first
  • the method and device for data transmission obtained in this embodiment.
  • the method obtains a modulation and coding strategy in the MCS table according to the MCS index by the sending device.
  • the modulation and coding strategy includes: modulation order, code rate, and overload indication.
  • the data is coded and modulated to obtain coded and modulated data.
  • the sending device sends the coded and modulated data to the receiving device, the receiving device receives the coded and modulated data sent by the sending device, and the receiving device according to the MCS index corresponding to the data in the modulation and coding strategy.
  • the MCS table obtains the modulation and coding strategy, and the receiving device demodulates and decodes the data according to the modulation and coding strategy to obtain the demodulated and decoded data.
  • the MCS table is improved by introducing an overload indicator in the MCS table. Item, selecting the best value for the overload indicator improves the system performance.
  • FIG. 1 illustrates a network architecture that may be applicable to embodiments of the present application
  • FIG. 2 is a schematic diagram of a data stream overlay provided by an embodiment of the present application.
  • FIG. 3 is a signaling flowchart of a data transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a possible modulation and coding process according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a possible modulation and coding process according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a possible modulation and coding process according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a sending device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of a receiving device according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a hardware structure of a sending device according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of a hardware structure of a receiving device according to an embodiment of the present application.
  • the embodiments of the present application can be applied to wireless communication systems.
  • the wireless communication systems mentioned in the embodiments of the present application include, but are not limited to: Narrowband Internet of Things (NB-IoT), Global Mobile Communication system (Global System for Mobile, Communications, GSM), Enhanced Data Rate GSM Evolution System (Enhanced Data Rate for GSM Evolution, EDGE), Wideband Code Division Multiple Access System (Wideband Code Division Multiple Access, WCDMA) 2000 System (Code Division Multiple Access) (CDMA2000), Time Division-Synchronization Code Division Multiple Access (TD-SCDMA), Long Term Evolution (LTE) and next-generation 5G mobile communication systems .
  • NB-IoT Narrowband Internet of Things
  • GSM Global Mobile Communication system
  • GSM Global System for Mobile, Communications
  • EDGE Enhanced Data Rate for GSM Evolution
  • WCDMA Wideband Code Division Multiple Access System
  • CDMA2000 Code Division Multiple Access
  • TD-SCDMA Time Division-Synchronization Code Division Multiple Access
  • LTE Long Term Evolution
  • FIG. 1 illustrates a network architecture to which embodiments of the present application may be applicable.
  • the network architecture provided by this embodiment includes a network device 101 and a terminal device 102.
  • the network device 101 is a device for accessing a terminal to a wireless network, and may be a base station in Global System of Mobile (GSM) or Code Division Multiple Access (CDMA) (Base Transceiver Station, BTS for short), or a base station (NodeB, NB) in Wideband Code Division Multiple Access (WCDMA), or long term evolution (LTE) Evolved NodeB (referred to as eNB or eNodeB), or relay station or access point, or network-side equipment (such as base stations) in the future 5G network or public land mobile network (Public Land Mobile Network) PLMN) is not limited here.
  • FIG. 1 schematically illustrates a possible schematic, and the network device 101 is used as a base station as an example for illustration.
  • the terminal device 102 may be a wireless terminal or a wired terminal.
  • the wireless terminal may be a device that provides voice and / or other business data connectivity to the user, a handheld device with a wireless connection function, or other processing connected to a wireless modem. device.
  • a wireless terminal can communicate with one or more core networks via a radio access network (Radio Access Network, RAN for short).
  • the wireless terminal can be a mobile terminal, such as a mobile phone (or a "cellular" phone) and a mobile terminal with a mobile terminal.
  • Computers for example, may be portable, pocket-sized, handheld, computer-built or vehicle-mounted mobile devices that exchange languages and / or data with a wireless access network.
  • a wireless terminal can also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, The access terminal (Access terminal), user terminal (User terminal), and user agent (User agent) are not limited here.
  • FIG. 1 schematically illustrates a possible schematic.
  • the network device 101 and the terminal devices 102A-102F constitute a communication system.
  • terminal devices 102A-102F can send uplink data or signals to network device 101, and network device 101 needs to receive uplink data or signals sent by terminal devices 102A-102F; network device 101 can send downlink data or signals to The terminal devices 102A-102F and the terminal devices 102A-102F need to receive downlink data or signals sent by the network device 101.
  • the terminal devices 102D-102F can also constitute a communication system.
  • the network device 101 can send downlink data to the terminal device 102A, terminal device 102B, terminal device 102C, terminal device 102D, and the like; the terminal device 102D can also send downlink data or signals to the terminal device 102E and terminal device 102F.
  • the receiving device when the sending device is the above-mentioned terminal device, the receiving device is a network device, and when the sending device is a network device, the receiving device is a terminal device.
  • one or more data streams may be superimposed on N resource units for transmission.
  • the resource unit may include multiple resource elements (RE), such as 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, etc.
  • the number of REs included in the resource unit is not particularly limited.
  • the resource used for multiplexing the data is based on the resource unit.
  • FIG. 2 is a schematic diagram of a data stream overlay provided by an embodiment of the present application.
  • each resource unit includes 4 REs, and a spatial layer of 4 terminal devices (A, B, C, D) is superimposed on each resource unit.
  • the spatial layer of each terminal device is divided into two spatial sublayers, that is, each terminal device has two spatial sublayers on a resource unit for transmitting data.
  • the space sublayers on the resource unit are A-1 and A-2; for terminal device B, the space sublayers on one resource unit are B-1 and B-2, and other terminal devices are similar. I will not repeat them here.
  • the data of the terminal device may be continuously superimposed and transmitted on the next resource unit.
  • the specific transmission method is similar to the foregoing embodiment, which is not described in this embodiment. .
  • RE is a unit of Resource Block (RB).
  • RB Resource Block
  • one RB corresponds to 7 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain, and corresponds to 12 subcarriers in the frequency domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the resource unit provided in this embodiment may be on the time-frequency domain grid. Multiple consecutive resource particles are taken horizontally, that is, resource particles in the same frequency domain and different time domains, and multiple continuous resource particles, that is, resource particles in the same time domain and different frequency domains may be taken vertically.
  • the implementation manner of the RB is not particularly limited, and the manner of selecting a resource unit is not particularly limited.
  • the signature sequence is used to distinguish and identify the spatial sublayer.
  • the signature sequence can be a codebook, a resource mapping method, a spread spectrum sequence, a scrambled sequence, an interleaved sequence, or other mapping patterns.
  • the signature sequence in this embodiment is The implementation method is not particularly limited.
  • the sending end and the receiving end can agree on a signature sequence of each spatial sublayer in advance, so that the receiving end can identify the sending end to which the spatial sublayer belongs according to the signature sequence.
  • the sending device is a terminal device and the receiving device is a network device.
  • FIG. 3 is a signaling flowchart of a data transmission method according to an embodiment of the present application. As shown in Figure 3, the method includes:
  • the terminal device obtains the modulation and coding strategy from the MCS table according to the modulation and coding strategy MCS index.
  • the modulation and coding strategy includes: modulation order, code rate, and overload indication.
  • the overload indication is used to instruct the terminal equipment and network equipment for data transmission. Overload information.
  • the terminal device may obtain a Modulation and Coding Scheme index sent by the network device, or may obtain the MCS index and then send the MCS index to the network device.
  • This embodiment does not specifically limit the implementation manner for the terminal device to obtain the MCS index, as long as the terminal device and the network device use the same MCS index for the same data.
  • the terminal device when a terminal device needs to send data to a network device, the terminal device needs to send a scheduling request to the network device to apply for an uplink resource. After the network device receives the scheduling request, the network device performs scheduling and resource allocation on the terminal device, and issues an uplink authorization to the terminal device.
  • the uplink authorization may include the following information: resource information allocated for uplink data transmission, MCS index, etc., that is, the network device sends the MCS index to the terminal device.
  • the network device allocates and informs the terminal device of multiple transmission resources in advance; when the terminal device needs uplink data transmission, it selects from the multiple transmission resources allocated by the network device in advance At least one transmission resource uses the selected transmission resource to send uplink data; the network device detects uplink data sent by the terminal device on one or more of the pre-allocated multiple transmission resources.
  • the detection may be blind detection, detection may be performed according to a certain control domain in the uplink data, or detection may be performed in other manners. That is, the terminal device can initiate uplink data transmission without scheduling by the network device. Therefore, the terminal device needs to notify the network device of the MCS index to facilitate the network device to perform demodulation and decoding.
  • the modulation and coding strategy indicated by the MCS index is obtained in the MCS table.
  • the MCS table stores entries corresponding to each MCS index, and all entries corresponding to the MCS index are modulation and coding strategies.
  • the modulation and coding strategy includes: a modulation order, a code rate, and an overload indication.
  • the modulation order determines the number of bits transmitted in one symbol.
  • the number of bits for patterns such as BPSK, QPSK, 8QAM, 16QAM, 32QAM, 64QAM, etc. are log2 (2), log2 (4), log2 (8), log2 (16), log2 (32), so these codes
  • the corresponding modulation order is 1, 2, 3, 4, 5, 6 respectively.
  • the modulation order can also indicate the number of points on the constellation diagram.
  • the modulation order is Qm, which means that there are 2 Qm points on the constellation diagram.
  • the data can be modulated according to the modulation order.
  • the code rate is the ratio between the number of information bits in the transport block and the total number of bits of the physical channel. Information such as the encoding length can be obtained based on the code rate, so the code rate can be used for encoding and decoding.
  • the overload indication is used to indicate overload information for data transmission between a terminal device and a network device.
  • the overload information may be, for example, the number of space sublayers of the terminal device, or may also be RE included in a resource unit for carrying the space sublayer.
  • the number may also be a value obtained by calculating the number of spatial sublayers and the number of REs.
  • This embodiment does not specifically limit the implementation of the overload information, as long as the overload indication can directly or indirectly indicate the number of space sublayers of the terminal device and / or the number of resource particles included in the resource unit carrying the space sublayer. .
  • the terminal device performs code modulation on the data according to the modulation and coding strategy to obtain the coded and modulated data.
  • the terminal device After acquiring the modulation and coding strategy, the terminal device performs coding and modulation according to the modulation and coding strategy to obtain modulated data.
  • the terminal device can modulate the data according to the modulation order, the data can be encoded according to the bit rate, the data can be layered according to the overload indication, and then the obtained spatial sublayer is superimposed on the resource unit.
  • the terminal device segments the data, and each piece of data corresponds to a spatial sublayer. After being divided into multiple spatial sublayers, each spatial sublayer corresponds to The data is encoded and modulated to obtain coded and modulated data.
  • the terminal device first encodes data to obtain a codeword, and then modulates the codeword, and finally maps the coded and modulated data to multiple spatial sublayers. To get the coded and modulated data.
  • the terminal device first encodes data to obtain a codeword, and then segments the codeword. Each segment of the codeword corresponds to a spatial sublayer, and then The codeword corresponding to the spatial sublayer is modulated to obtain coded and modulated data.
  • this embodiment does not specifically limit the implementation of coded modulation, as long as the final coded and modulated data passes through It is sufficient to encode, modulate, and map to multiple spatial sublayers. For the sequence of each step, this embodiment is not particularly limited.
  • the terminal device sends the coded and modulated data to the network device.
  • the network device receives the coded and modulated data sent by the terminal device.
  • the network device obtains the modulation and coding strategy from the MCS table according to the MCS index corresponding to the data.
  • the network device demodulates and decodes the data according to the modulation and coding strategy to obtain the demodulated and decoded data.
  • the terminal device After obtaining the coded and modulated data, the terminal device sends the coded and modulated data to the network device. After receiving the coded data from the terminal device, the network device obtains the MCS index of the data.
  • the MCS index of the data may be the MCS index sent by the network device to the terminal device during the uplink authorization process, or the MCS index sent by the terminal device to the network device during the uplink non-authorization process.
  • the network device searches the MCS table according to the MCS index to obtain a modulation and coding strategy.
  • the modulation and coding strategy includes a modulation order, a code rate, and an overload indication.
  • the network device can obtain the data corresponding to each spatial sublayer according to the overload indication, perform demodulation according to the modulation order, and perform decoding according to the bit rate to obtain the demodulated and decoded data. Further, corresponding to the coding and modulation methods of FIG. 4 to FIG. 6 described above, there are multiple possible implementations of the demodulation and decoding methods.
  • the demodulation and decoding method corresponding to FIG. 4 may be: the network device first demodulates and decodes the data on each spatial sublayer, and then combines the demodulated and decoded data of multiple spatial sublayers into a complete one.
  • the demodulation and decoding method corresponding to FIG. 5 may be: firstly combining data on each spatial sublayer into complete data, and then performing demodulation and decoding in a unified manner.
  • the demodulation and decoding method corresponding to FIG. 6 may be: firstly demodulate data on each spatial sublayer, then combine them into complete data, and finally decode the complete data.
  • the foregoing demodulation and decoding methods can also be combined or transformed to derive other demodulation and decoding methods.
  • This embodiment does not specifically limit the implementation of demodulation and decoding, as long as the final
  • the demodulated and decoded data may be demodulated, decoded, and combined into complete data.
  • the sequence of each step is not particularly limited in this embodiment.
  • the network device may superimpose the data of the spatial sublayers of different terminal devices on the frequency domain resources, and then Send data to different terminal devices, and the terminal device obtains the data sent by the network device.
  • the network device obtains the modulation and coding scheme of each terminal device from the MCS table according to the MCS index, and then performs code modulation on the data of each terminal device, and performs hierarchical processing on the data of each terminal device according to the overload indication.
  • the device obtains the modulation and coding scheme from the MCS table according to the MCS index, obtains the data of the terminal device in the spatial sublayer according to the modulation and coding scheme, and then performs demodulation and decoding.
  • the implementation manner is similar to the embodiment shown in FIG. 2, and this embodiment I won't repeat them here.
  • the data transmission method provided in this embodiment obtains a modulation and coding strategy in an MCS table according to an MCS index by a sending device.
  • the modulation and coding strategy includes a modulation order, a bit rate, and an overload indication, where the overload indication is used to instruct the sending device and the receiving device.
  • Overload information of device data transmission The transmitting device encodes and modulates the data according to the modulation and coding strategy to obtain the encoded data.
  • the transmitting device sends the encoded data to the receiving device.
  • the receiving device receives the encoded data sent by the transmitting device.
  • the receiving device obtains the modulation and coding strategy in the MCS table according to the MCS index corresponding to the data, and the receiving device demodulates and decodes the data according to the modulation and coding strategy to obtain the demodulated and decoded data.
  • the MCS table was improved by introducing an overload indicator. For the entries in MCS, the best overload indicator value was selected to improve system performance.
  • the overload information may specifically be a constraint relationship between the number of space sublayers used by the terminal device to transmit data and the number of resource particles included in the resource unit carrying the space sublayer.
  • the constraint relationship may be a value obtained through a preset function operation between the number L of spatial sublayers and the number F of resource particles in the resource unit, and the value may be understood as an overload indicator (OI).
  • OI F / L
  • the number of resource particles F may be obtained according to the preset function; or after the overload indicator OI and the number F of resource particles are learned, the The number L of spatial sublayers is obtained according to a preset function.
  • the number L of space sublayers or the number F of resource particles may be predetermined by the network device and the terminal device, or a correspondence between the number of space sublayers L or the number of resource particles F and the MCS index may be established.
  • the terminal device And the network device can obtain the number L of spatial sublayers or the number F of resource particles in the resource unit according to the MCS index.
  • the modulation order, code rate, and overload indication are all optional.
  • the code rate in the MCS table can be calculated by using Spectral Efficiency (SE), overload indication, and modulation order.
  • SE Spectral Efficiency
  • the bit rate may not be used as an entry.
  • overload indication OI for other entries that can be calculated through known parameters, such as overload indication OI, this embodiment will not list them one by one here. Whether these parameters can be obtained through known parameters and whether they are used as MCS entries is not particularly limited in this embodiment.
  • the overload indication may directly indicate the number of space sublayers L and the number of resource particles F
  • the MCS table may further include related entries of the number of space sublayers L and the number of resource particles F.
  • the corresponding entry can be the number of spatial sublayers L, resource particles The number F and at least one of the overload indication OI.
  • the entries of the MCS table cover as many parameters as possible.
  • the MCS table The entry of can be part or all of the entries in the following MCS tables.
  • the number of active terminal devices (active devices) in the system is different, and network devices can perform targeted scheduling.
  • the number of different active terminals corresponds to different MCS tables, that is, the MCS table used by the terminal device and the number of active terminal devices covered by the network device have a corresponding relationship.
  • the modulation and coding strategy further includes: spectral efficiency.
  • the spectral efficiency may be used to indicate a ratio of a net bit rate to a bandwidth, or to indicate a number of information bits carried on each resource particle.
  • the overload indication has a corresponding relationship with the spectral efficiency, and / or the overload indication has a corresponding relationship with the number of active terminal devices.
  • the overload indication there is a one-to-one or one-to-many correspondence between the overload indication and the spectral efficiency, that is, one overload indication corresponds to one spectral efficiency, or one overload indication corresponds to multiple spectral efficiency. Further, the corresponding relationship may also be an indication that the overload remains unchanged or decreases as the spectral efficiency increases. Among them, for the number of the same active terminal device, the overload indication remains unchanged or decreases as the spectrum efficiency increases.
  • the number of active terminal devices corresponds to one overload indicator, or the number of active terminal devices corresponds to multiple overload indicators. Further, the correspondence relationship may also be directed to the same spectrum efficiency in different MCS tables, and the overload indication remains unchanged or decreases as the number of active terminal devices increases.
  • the correspondence between the overload indication and the spectral efficiency SE is as follows:
  • MCS Index represents the MCS index
  • I MCS for short Modulation order for the modulation order
  • Q m for short
  • Overloading Indicator for overload indication
  • OI for short
  • Code rate for code rate
  • SE for spectral efficiency
  • Examples 1, 2 and 3 show possible implementations of the MCS table.
  • the network device and the terminal device store four tables correspondingly.
  • the terminal device not only obtains the MCS index, but also obtains a table index.
  • the table index is used to indicate the table corresponding to the MCS index.
  • the table index can also indicate The corresponding number of active terminal devices can obtain the modulation and coding strategy according to the MCS index in the table indicated by the table index according to the table index.
  • the network device and the terminal device may also store only one table, which includes part or all of the four tables mentioned above.
  • this table an entry that can increase the number of active terminal devices, that is, in the MCS An entry is added to the table to indicate the number of active terminal devices.
  • the content included in the four tables or one table corresponding to the number of active terminal devices may be multiple rows and / or multiples selected from the above Tables 1 to 12
  • the table is recombined.
  • the number of corresponding active terminal devices may not be listed in the above embodiment, and may be other numbers, and the rows and / or columns of the corresponding table may also be part or all of Table 1 to Table. Rows and / or columns selected in 12.
  • the value of the overload indication may be different, such as 1/12 or 1/8 or 1/6 or 1/4 or 1/3 or 1/2 or 2/3 or 5/6 or 1 or 3/4 etc.
  • a network device can perform targeted scheduling for different numbers of active terminal devices in the system.
  • the overload indication has a correspondence relationship with the spectral efficiency, and / or, the overload indication has a correspondence relationship with the number of active terminal devices.
  • the determination of the number F of resource particles contained in the resource unit may include the following possible implementation manners.
  • the number F of resource particles included in the resource unit is predetermined by the network device and the terminal device, and the value of F may be 4, 6, 8, 12, or equal to a resource block The number of resource particles in RB).
  • the modulation and coding strategy further includes: the number of REs included in the resource unit; wherein, in the MCS table, the number of REs included in the resource unit has a corresponding relationship with the spectral efficiency.
  • the number of REs included in the resource unit has a corresponding relationship with the number of active terminal devices.
  • the correspondence between the number of REs included in the resource unit and the spectral efficiency may specifically be that the number of REs included in the resource unit remains unchanged or increases with the increase of the spectral efficiency.
  • the corresponding relationship between the number of REs included in the resource unit and the number of active terminal devices can be specifically for the same spectrum efficiency in different MCS tables.
  • the number of REs included in the resource unit increases with the number of active terminal devices. Remain the same or increase.
  • the correspondence between the number of REs included in the resource unit and the spectral efficiency SE is as follows:
  • the correspondence between the number of REs included in the resource unit and the number of active terminal devices is as follows:
  • Example 4 shows a possible implementation of the MCS table.
  • the correspondence between the number of active terminal devices and the MCS table is given.
  • the number of active terminal devices 1 Or 2 MCS table
  • the number of active terminal devices 4
  • the number of active terminal devices 6,
  • the number of active terminal devices 8, corresponding to the MCS table, that is, this example corresponds to Four watches.
  • the network device and the terminal device store four tables correspondingly.
  • the terminal device not only obtains the MCS index, but also obtains the table index.
  • the table indicated by the table index according to the MCS index Get the modulation and coding strategy.
  • the network device and the terminal device can also store only one table, which includes part or all of the above four tables. In this table, an entry that can increase the number of active terminal devices, that is, in the MCS Added a column to the table to indicate the number of active end devices.
  • the content included in the four tables or one table corresponding to the number of active terminal devices may be multiple rows and / or multiples selected from the above Tables 13 to 16
  • the table is recombined.
  • the number of corresponding active terminal devices may not be listed in the above embodiments, and may be other numbers, and the rows and / or columns of the corresponding tables may also be part or all of Tables 13 to Tables. The row and / or column selected in 16.
  • the MCS table corresponding to the number of any active terminal devices in the system is the same.
  • the overload indication has a correspondence relationship with the spectral efficiency, and the correspondence relationship may be a one-to-one or one-to-many correspondence.
  • the correspondence between the overload indication and the spectral efficiency may be that the overload indication remains unchanged or decreases as the spectral efficiency increases.
  • the correspondence between the overload indication and the spectral efficiency SE is as follows:
  • overload indication G2;
  • overload indication G3;
  • the network device since it is an unauthorized transmission mode, the network device cannot perform targeted scheduling on the terminal device, so it can target any number of active terminal devices. Both the network device and the terminal device can store only one table. .
  • the MCS table that is actually applied may be part or all of Table 17 described above, which is not particularly limited in this embodiment.
  • the MCS table corresponding to the number of any active terminal devices in the system is the same, and the correspondence between the overload indication and the spectral efficiency SE is specifically that any SE corresponds to the same overload indication.
  • the value of the overload indicator is 1/12 or 1/8 or 1/6 or 1/4 or 1/3 or 1/2 or 2/3 or 5/6 or 1 or 3/4.
  • the value of the overload indication OI is 1, and in Table 19 shown in Example 7, the value of the overload indication OI is 1/2.
  • the value of the overload indication OI may be other, and the actual applied MCS table may be part or all of the above-mentioned Table 18 and Table 19, which is not particularly limited here in this embodiment.
  • the value of the constant may be 8 or 4 or 2 or 1 or 1/2 or 4 or 1/4.
  • the value of OI * Q m is 2.
  • the value of OI * Q m can be other.
  • the actual application MCS table can be part or all of Table 20 above. This implementation Examples are not particularly limited here.
  • the MCS table corresponding to the number of any active terminal devices in the system is the same.
  • the determination manner of the overload indication may be as shown in implementation manner three, implementation manner four, or implementation manner five.
  • a possible implementation manner of obtaining the number F of resource particles included in the resource unit in the overload instruction is:
  • the number F of resource particles is predetermined by the network device and the terminal device, and the value of F may be, for example, 4, 6, 8, 12, or equal to a resource block (RB).
  • the number of resource particles is predetermined by the network device and the terminal device, and the value of F may be, for example, 4, 6, 8, 12, or equal to a resource block (RB).
  • RB resource block
  • the modulation and coding strategy further includes: the number of REs included in the resource unit; wherein, in the MCS table, the number of REs included in the resource unit has a corresponding relationship with the spectral efficiency.
  • the number of REs included in the resource unit has a corresponding relationship with the number of active terminal devices.
  • the correspondence between the number of REs included in the resource unit and the spectral efficiency may specifically be that the number of REs included in the resource unit remains unchanged or increases with the increase of the spectral efficiency.
  • the correspondence between the number F of REs included in the resource unit and the spectral efficiency SE is as follows:
  • the bit rate provided in this embodiment may also be related to the overload indication OI.
  • OI overload indication
  • an entry for the number of active terminal devices can be added to the MCS table.
  • the OI value can be fixed and the relationship between the bit rate and the overload indication OI can be specified.
  • Overloading Indicator OI for #of UE represents an overload instruction corresponding to the number of active terminal devices.
  • the number of active terminal devices is 1, 2, 4, 6, 8.
  • the above Tables 21 to 26 provide the relationship between the possible bit rate and the overload indication through the division operation.
  • the relationship between the bit rate and the overload indication can also be given through other calculation methods. This implementation Examples are not repeated here.
  • the overload indications in the above Tables 21 to 26 can also take other values, which are not particularly limited here in this embodiment.
  • the actual application form may also be part or all of the above-mentioned Table 21 to Table 26.
  • the overload indication OI is given.
  • the number F of REs in the resource unit also needs to be known.
  • the terminal device and the network device may also update the OI values of the tables in the first implementation method to the seventh implementation method according to the value of the F.
  • the number of spatial sublayers L can be obtained.
  • the number of spatial sublayers L and the obtained F can be used to obtain
  • the new OI is to update the OI in the MCS table.
  • the bit rate may also be updated according to the updated OI.
  • the versatility and compatibility of the MCS table can be increased, and the number of resource particles included in different resource units can use the same MCS table.
  • the overload indication OI is given.
  • the number of spatial sublayers L needs to be known.
  • the terminal device and the network device may also update the OI values of the tables in the first implementation method to the seventh implementation method according to the value of the F.
  • F can be obtained.
  • a new OI can be obtained through the obtained F and the obtained L, that is, the OI in the MCS table is updated.
  • the bit rate may also be updated according to the updated OI.
  • other MCS tables can be derived on the basis of the above Tables 1 to 25.
  • the versatility and compatibility of the MCS table can be increased, and different Ls can use the same MCS table.
  • the overload indication (or the overload indication and F, or the overload indication and L) are not reflected in the MCS table.
  • the network device is controlled by downlink control information (DCI) or radio resource control (RRC) instructions or signature information during multiple access or media access control (MAC) layer control.
  • DCI downlink control information
  • RRC radio resource control
  • the unit (control element, CE) signaling informs the network device of the currently used overload indicator (or overload indicator and F, or overload indicator and L) or the currently used overload indicator (or overload indicator and F, or overload indicator and L)
  • the corresponding instruction information may be an index value.
  • the terminal device and the network device transmit data
  • the number of bits included in the transmission block of the transmission data that is, the transport block size (TBS)
  • TBS transport block size
  • the overload indication OI since the overload indication OI is introduced in the MCS table, when calculating the TBS, the overload indication OI needs to be considered.
  • Ninfo NRE * R * Qm * v * OI is calculated first, where NRE is the number of resource particles transmitting data, v is the number of spatial layers, and Q m is The modulation order, R is the code rate, and OI is the load indicator. According to the Ninfo, the size of the TBS can be obtained.
  • the load detected by the multi-user is directly proportional to the overload indication, which can be expressed qualitatively by Formula 1:
  • MUD load is the load detected by multiple users
  • #UE is the number of active terminal devices
  • NumAnt is the number of available antennas
  • OI is the overload indicator
  • the load of the modulation code is inversely proportional to the overload indication.
  • the qualitative expression can be expressed by the following formula 2:
  • MCS load is the load of modulation and coding
  • NumSym is the number of symbols
  • R is the code rate
  • Qm is the modulation order
  • OI is the overload indicator
  • se is the spectral efficiency
  • the overload indication can shift the burden of multi-user detection to modulation and coding, thereby improving performance, and thus can obtain the various corresponding relationships described above.
  • the overload indication remains as the number of active terminal devices increases Unchanged or reduced.
  • the OI in order to keep the MUD load from increasing, the OI remains the same or decreases, so that the burden is passed on to the modulation and coding.
  • the overload indicator remains the same or decreases as the spectral efficiency increases. small.
  • FIG. 8 is a schematic structural diagram of a sending device according to an embodiment of the present application.
  • the sending device 80 includes: a processing module 801 and a sending module 802;
  • a processing module 801 is configured to obtain a modulation and coding strategy in an MCS table according to a modulation and coding strategy MCS index, where the modulation and coding strategy includes a modulation order, a bit rate, and an overload indication, and the overload indication is used to instruct the sending device and the The receiving device is used for data transmission overload information;
  • the processing module 801 is further configured to perform code modulation on data according to the modulation and coding strategy to obtain coded and modulated data;
  • the sending module 802 is configured to send the coded and modulated data to a receiving device.
  • the overload information is a constraint relationship between the number of space sublayers used for transmitting data and the number of resource particles included in the resource unit carrying the space sublayer.
  • the MCS table has a corresponding relationship with the number of active devices.
  • the modulation and coding strategy further includes: spectral efficiency;
  • the overload indication has a corresponding relationship with the spectral efficiency.
  • the modulation and coding strategy further includes: the number of REs included in the resource unit; wherein,
  • the number of resource particles included in the resource unit has a corresponding relationship with the spectral efficiency.
  • the overload indication has a corresponding relationship with the number of the active devices.
  • the modulation and coding strategy further includes: the number of REs included in the resource unit;
  • the number of REs included in the resource unit has a corresponding relationship with the number of active devices.
  • the sending device provided in this embodiment may be used to execute the method performed by the sending device, and its implementation principles and technical effects are similar. This embodiment will not repeat them here.
  • FIG. 9 is a schematic structural diagram of a receiving device according to an embodiment of the present application. As shown in FIG. 9, the receiving device 90 includes a receiving module 901 and a processing module 902. among them
  • a processing module 902 is configured to obtain a modulation and coding strategy from an MCS table according to a modulation and coding strategy MCS index corresponding to the data, where the modulation and coding strategy includes a modulation order, a bit rate, and an overload indication, where the overload indication is used to indicate Overload information used by the sending device and the receiving device for data transmission;
  • the processing module 902 is further configured to demodulate and decode the data according to the modulation and coding strategy to obtain demodulated and decoded data.
  • the overload information is a constraint relationship between the number of space sublayers used for transmitting data and the number of resource particles included in the resource unit carrying the space sublayer.
  • the MCS table has a corresponding relationship with the number of active devices.
  • the modulation and coding strategy further includes: spectral efficiency;
  • the overload indication has a corresponding relationship with the spectral efficiency.
  • the modulation and coding strategy further includes: the number of REs included in the resource unit; wherein,
  • the number of resource particles included in the resource unit has a corresponding relationship with the spectral efficiency.
  • the overload indication has a corresponding relationship with the number of the active devices.
  • the modulation and coding strategy further includes: the number of REs included in the resource unit;
  • the number of REs included in the resource unit has a corresponding relationship with the number of active devices.
  • the receiving device provided in this embodiment may be used to execute the method performed by the foregoing receiving device, and its implementation principles and technical effects are similar. This embodiment will not repeat them here.
  • FIG. 10 is a schematic diagram of a hardware structure of a sending device according to an embodiment of the present application.
  • the sending device 100 includes a processor 1001 and a memory 1002;
  • a memory 1002 configured to store a computer program
  • the processor 1001 is configured to execute a computer program stored in a memory to implement each step performed by the sending device in the foregoing embodiment. For details, refer to related descriptions in the foregoing method embodiments.
  • the memory 1002 may be independent or integrated with the processor 1001.
  • the sending device 100 may further include:
  • the bus 1003 is configured to connect the memory 1002 and the processor 1001.
  • the receiving device shown in FIG. 10 may further include a transmitter 1004, configured to send coded and modulated data and the like.
  • FIG. 11 is a schematic diagram of a hardware structure of a receiving device according to an embodiment of the present application. As shown in FIG. 11, the receiving device 110 includes: a processor 1101 and a memory 1102;
  • a memory 1102 for storing a computer program
  • the processor 1101 is configured to execute a computer program stored in a memory to implement each step performed by the second device in the foregoing embodiment. For details, refer to related descriptions in the foregoing method embodiments.
  • the memory 1102 may be independent or integrated with the processor 1101.
  • the second device 110 may further include:
  • the bus 1103 is configured to connect the memory 1102 and the processor 1101.
  • the second device shown in FIG. 11 may further include a receiver 1104 for receiving data and the like.
  • An embodiment of the present application further provides a storage medium, where the storage medium includes a computer program, and the computer program is configured to implement a data transmission method performed by the sending device.
  • An embodiment of the present application further provides a storage medium, where the storage medium includes a computer program, and the computer program is configured to implement a data transmission method performed by the receiving device.
  • An embodiment of the present application further provides a computer program product, where the computer program product includes computer program code, and when the computer program code runs on a computer, the computer causes the computer to execute the data transmission method performed by the sending device. .
  • An embodiment of the present application further provides a computer program product, where the computer program product includes computer program code, and when the computer program code runs on a computer, the computer causes the computer to execute a data transmission method performed by the receiving device.
  • An embodiment of the present application further provides a chip, which includes a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, and execute the program as executed by the sending device.
  • a chip which includes a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, and execute the program as executed by the sending device.
  • An embodiment of the present application further provides a chip, which includes a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, and execute the program as executed by the receiving device Data transmission method.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the modules is only a logical function division.
  • multiple modules may be combined or integrated.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, which may be electrical, mechanical or other forms.
  • each functional module in each embodiment of the present invention may be integrated into one processing unit, or each module may exist separately physically, or two or more modules may be integrated into one unit.
  • the units formed by the above modules may be implemented in the form of hardware or in the form of hardware plus software functional units.
  • the integrated modules implemented in the form of software functional modules may be stored in a computer-readable storage medium.
  • the software function module is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a processor (English: processor) to execute the various embodiments described in this application. Part of the method.
  • processor may be a central processing unit (English: Central Processing Unit, CPU for short), other general-purpose processors, digital signal processors (English: Digital Signal Processor, DSP), application specific integrated circuits (English: Application Specific Integrated Circuit, ASIC for short).
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the invention can be directly embodied as being executed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor.
  • the memory may include high-speed RAM memory, and may also include non-volatile storage NVM, such as at least one disk memory, and may also be a U disk, a mobile hard disk, a read-only memory, a magnetic disk, or an optical disk.
  • NVM non-volatile storage
  • the bus may be an Industry Standard Architecture (ISA) bus, an External Device Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus.
  • ISA Industry Standard Architecture
  • PCI External Device Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus can be divided into an address bus, a data bus, a control bus, and the like.
  • the bus in the drawings of the present application is not limited to only one bus or one type of bus.
  • the above storage medium may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable Except programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable except programmable read-only memory
  • PROM programmable read-only memory
  • ROM read-only memory
  • magnetic memory flash memory
  • flash memory magnetic disk or optical disk.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.

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

Abstract

La présente invention concerne, selon des modes de réalisation, un procédé et un dispositif de transmission de données. Le procédé comprend les étapes suivantes : un dispositif d'envoi acquiert, selon un indice de schéma de modulation et de codage (MCS), un schéma de modulation et de codage à partir d'une table MCS, le schéma de modulation et de codage comprenant : un ordre de modulation, un débit de code et une indication de surcharge, l'indication de surcharge étant utilisée pour indiquer des informations de surcharge utilisées par le dispositif d'envoi et par un dispositif de réception pour une transmission de données ; le dispositif d'envoi code et module les données selon le schéma de modulation et de codage, de manière à obtenir des données codées et modulées ; et le dispositif d'envoi envoie les données codées et modulées au dispositif de réception.
PCT/CN2019/099546 2018-08-08 2019-08-07 Procédé et dispositif de transmission de données WO2020029987A1 (fr)

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WO2022041290A1 (fr) * 2020-08-31 2022-03-03 华为技术有限公司 Appareil et procédé de transmission d'informations
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