WO2017133407A1 - 信号传输方法和装置 - Google Patents

信号传输方法和装置 Download PDF

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Publication number
WO2017133407A1
WO2017133407A1 PCT/CN2017/070653 CN2017070653W WO2017133407A1 WO 2017133407 A1 WO2017133407 A1 WO 2017133407A1 CN 2017070653 W CN2017070653 W CN 2017070653W WO 2017133407 A1 WO2017133407 A1 WO 2017133407A1
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WO
WIPO (PCT)
Prior art keywords
codebook
modulation symbols
symbol
modulation
time slots
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PCT/CN2017/070653
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English (en)
French (fr)
Inventor
李榕
张朝龙
王坚
罗禾佳
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2017133407A1 publication Critical patent/WO2017133407A1/zh
Priority to US16/053,446 priority Critical patent/US20180343093A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0682—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission using phase diversity (e.g. phase sweeping)
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J99/00—Subject matter not provided for in other groups of this subclass
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/26025—Numerology, i.e. varying one or more of symbol duration, subcarrier spacing, Fourier transform size, sampling rate or down-clocking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2626—Arrangements specific to the transmitter only
    • H04L27/2627—Modulators
    • H04L27/2634—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation
    • H04L27/2636—Inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators in combination with other circuits for modulation with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0016—Time-frequency-code
    • H04L5/0021—Time-frequency-code in which codes are applied as a frequency-domain sequences, e.g. MC-CDMA
    • 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
    • H04L5/0046—Determination of how many bits are transmitted on different sub-channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present application relates to the field of communications and, more particularly, to a signal transmission method and apparatus.
  • the fifth-generation communication system includes a wider range of application scenarios. In addition to the traditional mobile communication scenarios, it may also include non-human-centered communication such as the Internet of Vehicles and the Internet of Things. Scenes.
  • the integration of 5G to the MTC (Machine Type Communication) system represented by the Internet of Things indicates that there will be a huge number of connections in the next generation communication system.
  • MTC Machine Type Communication
  • H2H Human-to-Human
  • MTC system Since the transmission of a large number of packets is likely to cause excessive power consumption at the transmitting end, it is urgent to provide a signal transmission method to reduce the transmission power consumption of the transmitting end.
  • the embodiment of the present application provides a signal transmission method and device, which can reduce transmission power consumption of a transmitting end, and is particularly suitable for a huge transmission communication scenario in a 5G communication system.
  • a signal transmission method comprising the steps of: a communication device acquiring a bit group from a bitstream to be transmitted. Based on the codebook, the communication device modulates the set of bits to obtain at least two modulation symbols. The communications device maps each of the at least two of the modulation symbols to a corresponding time slot in the frame. The communication device transmits the mapped at least two of the modulation symbols. The different modulation symbols obtained by the same bit group are mapped to different time slots, and each time slot includes a plurality of consecutive modulation symbol mapping positions for mapping modulation symbols obtained by multiple bit groups of the to-be-transmitted bit stream.
  • each time slot includes multiple consecutive modulation symbol mapping positions for mapping multiple bits of the bit stream to be transmitted.
  • the modulation symbols obtained by the group can make the transmitted symbols continuous in time, avoiding frequent RF ON/OFF (on/off) problems at the transmitting end, and avoiding excessive power consumption at the transmitting end, especially suitable for communication of massive packet transmission. Scenes.
  • the codebook indicates a correspondence between a bit group and a modulation symbol and a correspondence between a modulation symbol and a time slot.
  • the communications device may modulate the bit group according to the correspondence between the bit group and the modulation symbol indicated by the codebook to obtain at least two modulation symbols.
  • the communication device may map each of the at least two of the modulation symbols to a corresponding time slot in the frame according to a correspondence between the modulation symbol and the time slot indicated by the codebook.
  • the codebook includes a plurality of codewords, the codeword being a multi-dimensional complex vector, the codeword including at least one zero Symbol and at least one non-zero symbol.
  • the codebook mentioned in the embodiment of the present application may be referred to as a Sparse Code Multiple Access (SCMA) codebook.
  • SCMA Sparse Code Multiple Access
  • the codebook in the embodiment of the present application may have another name.
  • the order of each of the modulation symbols in the plurality of consecutive modulation symbol mapping positions, and corresponding The order of the bit groups in the bit stream to be transmitted is consistent. Thereby, the receiving end can directly obtain the original according to the position of the symbol. Data for simple decoding.
  • the number of timeslots of the frame is the same as the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the number of time slots corresponding to the codebook set to which the codebook belongs is the sum of the number of time slots that all codebooks in the codebook set may map.
  • the number of time slots corresponding to the 6x4 codebook set is 4, and the number of time slots mapped by each codebook is 2.
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • the terminal may determine the codebook from the codebook set. For example, the terminal can randomly select a codebook from a codebook set.
  • the communications device may send the mapped at least two of the modulation symbols by using a single carrier. That is, at least two of the mapped modulation symbols are transmitted using a single carrier.
  • the embodiment of the present application may use a single carrier to transmit the mapped modulation symbols. Transmitting the mapped modulation symbols through a single carrier can make the receiving end have a single carrier system with a simple structure and wide coverage, and the transmission time domain signal has the advantage of a low Peak to Average Power Ratio (PAPR).
  • PAPR Peak to Average Power Ratio
  • the communications device may select the subcarrier from the multiple subcarriers as the single carrier, to send the mapped at least two The modulation symbols, wherein a plurality of the subcarriers constitute a continuous spectrum.
  • the multiple single carriers may have the same carrier width, or there may be two or more subcarriers having different carrier widths, where the carrier width refers to the bandwidth of the carrier, that is, the frequency range occupied by the modulated carrier, that is, the maximum of the carrier.
  • the difference between the frequency and the minimum frequency for example, the carrier width of subcarrier 1 is [10M 20M], and the carrier width of subcarrier 2 is [30M 40M], and it is considered that subcarrier 1 and subcarrier 2 have the same carrier width.
  • the communication device can determine the codebook used to transmit the data from the codebook set corresponding to the selected subcarrier.
  • the codebook set corresponding to each subcarrier may be the same or different.
  • a single system frame is divided into different numbers of multiple equal length time slots on different subcarriers according to different specifications of the codebook set used.
  • a terminal device can only use one subcarrier to transmit data, and select a codebook in the corresponding codebook set on the subcarrier to process the data.
  • the widths of the multiple subcarriers may be the same or different.
  • the terminal device can select the subcarriers according to the required transmission rate and the distance from the receiving end. For example, the farther the terminal is from the base station, the narrower the carrier width is chosen, because at this time the same energy is distributed over a narrower spectrum and can be transmitted further. When the distance from the base station is closer, the transmission distance is not so high. At this time, the terminal can appropriately select a wider carrier width and spread the energy over a wider frequency band for higher rate with the base station. Communication rate.
  • the communications device may also determine the used codebook set from the time domain resources to be used for transmitting data. For example, in a certain four time slots, one 6x4 codebook set is used, and in the next four time slots, another 6x4 codebook set is used.
  • the communication device can also determine the used codebook set from the subcarriers and time domain resources used to transmit the data. For example, the selected subcarrier indicates that the specification of the codebook set used is 6x4, but it may be specifically determined which 6x4 codebook set to use according to the time domain resources used.
  • the communication device is a terminal device.
  • a signal transmission method comprising the steps of: a communication device receiving a multiplexing symbol in each time slot in a frame, and multiplexing symbols having a plurality of modulation symbols at the transmitting end.
  • Communication device according to the codebook, from each of the described At least two modulation symbols of each transmitting end are obtained from the multiplexing symbols of the at least two time slots corresponding to the transmitting end.
  • the communication device demodulates the at least two modulation symbols obtained from the at least time slot to obtain a bit group. According to the bit group, the communication device acquires the sender data.
  • the codebook indicates a correspondence between a bit group and a modulation symbol and a correspondence between a modulation symbol and a time slot.
  • the communications device obtains each of the multiplexing symbols of at least two time slots corresponding to each of the transmitting ends according to the correspondence between the modulation symbols and the time slots indicated by the codebook. Decoding at least two modulation symbols of the transmitting end, and demodulating the at least two modulation symbols obtained from the at least two time slots according to a correspondence between a bit group and a modulation symbol indicated by the codebook, to obtain a bit group.
  • the number of time slots of the frame is the same as the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • each time slot includes a plurality of consecutive symbol mapping locations, where the at least two of the frames are The modulation symbols are respectively acquired in each time slot of the slot, including: acquiring modulation symbols sequentially in a plurality of consecutive symbol mapping positions of each time slot, and at least two modulation symbols acquired at corresponding positions of the time slots are used for common Demodulation acquires a bit group.
  • the codebook is composed of multiple codewords, where the codeword is a multi-dimensional complex vector, and the codeword includes At least one zero symbol and at least one non-zero symbol.
  • the communication device is a base station.
  • a frame including a plurality of time slots, each of the time slots including a plurality of consecutive modulation symbol mapping positions for mapping modulation symbols corresponding to a plurality of bit groups of a bit stream to be transmitted.
  • Each bit group corresponds to at least two modulation symbols, and the modulation symbol corresponding to each bit group is obtained by modulating the bit group according to the codebook.
  • the different modulation symbols obtained by the same bit group are mapped in different time slots.
  • the number of time slots included in the frame is the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • the codebook includes multiple codewords, where the codeword is a multi-dimensional complex vector, and the codeword includes at least A zero symbol and at least one non-zero symbol.
  • a communication device in a fourth aspect, includes a processor, a memory, and a transceiver.
  • the memory is used to store an instruction
  • the processor is configured to invoke the instruction to perform processing of acquiring a bit group from a bitstream to be transmitted.
  • the communication device modulates the set of bits to obtain at least two modulation symbols. Mapping each of the at least two of the modulation symbols to a corresponding time slot in the frame. The mapped at least two of the modulation symbols are transmitted by the transceiver.
  • the different modulation symbols obtained by the same bit group are mapped to different time slots, and each time slot includes a plurality of consecutive modulation symbol mapping positions for mapping modulation symbols obtained by multiple bit groups of the to-be-transmitted bit stream.
  • the codebook indicates a correspondence between the bit group and the modulation symbol and a correspondence between the modulation symbol and the time slot.
  • the processor is configured to invoke the instruction to perform the following processing: according to the code Corresponding relationship between the bit group and the modulation symbol indicated by the present invention, the bit group is modulated to obtain at least two modulation symbols, and each of at least two of the modulation symbols is obtained according to a correspondence between a modulation symbol and a time slot indicated by the codebook. The modulation symbols are mapped to corresponding time slots in the frame.
  • the number of time slots included in the frame is the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • the processor is configured to invoke the instruction to perform the following processing:
  • At least two of the modulation symbols after resource mapping by a single carrier are utilized by the transceiver.
  • the processor is used to invoke the instruction to perform the following process: selecting subcarriers from multiple subcarriers as The single carrier is configured to transmit the mapped at least two of the modulation symbols, wherein the plurality of subcarriers form a continuous spectrum, and the codebook is determined according to the codebook set corresponding to the selected subcarrier.
  • the ordering of each of the modulation symbols in the plurality of consecutive modulation symbol mapping positions, and corresponding The order of the bits in the bitstream to be transmitted is consistent.
  • the codebook includes multiple codewords, where the codeword is a multi-dimensional complex vector, and the codebook includes At least one zero symbol and at least one non-zero symbol.
  • the communications device is a terminal device.
  • a communication device in a fifth aspect, includes a processor, a memory, and a transceiver.
  • the memory is used to store an instruction
  • the processor is configured to invoke the instruction to perform processing of receiving a multiplex symbol in each time slot in a transceiver frame, the multiplex symbol being multiplexed with modulation symbols of a plurality of transmitting ends.
  • Demodulating the at least two modulation symbols obtained from the at least two time slots according to the codebook to obtain a bit group. According to the bit group, the sender data is acquired.
  • the codebook indicates a correspondence between a bit group and a modulation symbol and a correspondence between a modulation symbol and a time slot.
  • the processor is configured to invoke the instruction to perform processing of: at least two time slots corresponding to each of the transmitting ends according to a correspondence between a modulation symbol and a time slot indicated by the codebook. Acquiring at least two modulation symbols of each of the transmitting ends in the multiplexing symbol, and the at least two modulations obtained from the at least two time slots according to a correspondence between a bit group and a modulation symbol indicated by the codebook The symbols are demodulated to obtain a bit group.
  • the number of time slots included in the frame is the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • each time slot includes a plurality of consecutive symbol mapping locations
  • the processor is configured to invoke the instruction Specifically, the following processing is performed: the receiving symbol is sequentially acquired by the transceiver in a plurality of consecutive symbol mapping positions of each time slot, and at least two received symbols acquired at corresponding positions of the time slot are used for jointly demodulating the obtained bit group. .
  • the codebook is composed of multiple codewords, where the codeword is a multi-dimensional complex vector, the codeword At least one zero symbol and at least one non-zero symbol are included.
  • the communications device is a base station.
  • a communication device comprising the following acquisition unit, modulation unit, mapping unit and transmission unit.
  • the obtaining unit is configured to obtain a bit group from the bit stream to be sent.
  • a modulating unit configured to, based on the codebook, modulate the group of bits to obtain at least two modulation symbols.
  • a mapping unit configured to map each of the at least two of the modulation symbols to a corresponding time slot in the frame.
  • a sending unit configured to send the mapped at least two of the modulation symbols.
  • the different modulation symbols obtained by the same bit group are mapped to different time slots, and each time slot includes a plurality of consecutive modulation symbol mapping positions for mapping modulation symbols obtained by multiple bit groups of the to-be-transmitted bit stream.
  • the codebook indicates a correspondence between the bit group and the modulation symbol and a correspondence between the modulation symbol and the time slot.
  • the communications device may modulate the bit group according to the correspondence between the bit group and the modulation symbol indicated by the codebook, to obtain at least two modulation symbols, and a modulation symbol and a code according to the codebook. Corresponding relationship of time slots, each of the at least two modulation symbols is mapped to a corresponding time slot in the frame.
  • the number of time slots of the frame is the same as the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • the communications device sends the resource mapped at least two of the modulation symbols by using a single carrier.
  • the method before the at least two the modulation symbols after the resource mapping is sent by using a single carrier, the method further includes Selecting a subcarrier from the plurality of subcarriers as the single carrier to transmit the mapped at least two of the modulation symbols, where the plurality of the subcarriers form a continuous spectrum, and determining from the selected codebook set of the subcarriers The codebook.
  • the ordering of each of the modulation symbols in the plurality of consecutive modulation symbol mapping positions, and corresponding The order of the bits in the bitstream to be transmitted is consistent.
  • the codebook includes a plurality of codewords, where the codeword is a multi-dimensional complex vector, and the codeword includes At least one zero symbol and at least one non-zero symbol.
  • the communications device is a terminal device.
  • a communication device comprising a receiving unit and an obtaining unit.
  • the receiving unit receives the multiplexed symbols in each time slot in the frame, and the multiplexed symbols are multiplexed with modulation symbols of the plurality of transmitting ends.
  • the codebook indicates a bit group and a modulator The correspondence between the numbers and the correspondence between the modulation symbols and the time slots.
  • the acquiring unit may obtain each of the multiplexing symbols of at least two time slots corresponding to each of the transmitting ends according to the correspondence between the modulation symbols and the time slots indicated by the codebook. At least two modulation symbols of the transmitting end, and demodulating the at least two modulation symbols obtained from the at least two time slots according to a correspondence between a bit group and a modulation symbol indicated by the codebook, to obtain a bit group .
  • the number of timeslots of the frame is the same as the number of timeslots corresponding to the codebook set to which the codebook belongs .
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • each time slot includes a plurality of consecutive symbol mapping locations
  • Obtaining modulation symbols in each time slot of the time slot respectively includes: sequentially acquiring the received symbols in a plurality of consecutive symbol mapping positions of the time slots, and receiving symbols obtained by acquiring at least two corresponding positions of the time slots each time Co-demodulation acquires a bit group.
  • the codebook is composed of multiple codewords, where the codeword is a multi-dimensional complex vector, the codeword At least one zero symbol and at least one non-zero symbol are included.
  • the communications device is a base station.
  • a memory for storing computer readable instructions for performing a process of obtaining a set of bits from a bitstream to be transmitted. Based on the codebook, the bit group is modulated to obtain at least two modulation symbols. Each of the at least two of the modulation symbols is mapped to a corresponding time slot in the frame. Transmitting at least two of the modulated symbols. The different modulation symbols obtained by the same bit group are mapped to different time slots, and each time slot includes a plurality of consecutive modulation symbol mapping positions for mapping modulation symbols obtained by multiple bit groups of the to-be-transmitted bit stream.
  • the codebook indicates a correspondence between a bit group and a modulation symbol and a correspondence between a modulation symbol and a time slot.
  • the instruction may perform the following operations: modulating the bit group according to the correspondence between the bit group and the modulation symbol indicated by the codebook, obtaining at least two modulation symbols, and indicating according to the codebook. Corresponding relationship between the modulation symbol and the time slot, mapping each of the at least two of the modulation symbols to a corresponding time slot in the frame.
  • the number of timeslots of the frame is the same as the number of timeslots corresponding to the codebook set to which the codebook belongs .
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • At least two of the modulation symbols after resource mapping are transmitted through a single carrier.
  • the instruction is specifically used to: at least two the modulation symbols after the resource mapping is sent by using a single carrier
  • the subcarrier is selected as the single carrier from the plurality of subcarriers to transmit the mapped at least two of the modulation symbols, where the plurality of subcarriers form a continuous spectrum, and the code is determined from the codebook set corresponding to the selected subcarrier.
  • the fifth possible implementation of the eighth aspect wherein the ordering of each of the modulation symbols in the plurality of consecutive modulation symbol mapping positions is consistent with the ordering of the corresponding bit groups in the to-be-transmitted bitstream.
  • the codebook includes multiple codewords, where the codeword is a multi-dimensional complex vector, and the codeword includes At least one zero symbol and at least one non-zero symbol.
  • a memory for storing computer readable instructions for: receiving a multiplexed symbol in each time slot in a frame, the multiplexed symbol multiplexed with a plurality of Modulation symbol at the transmitting end. Obtaining, according to the codebook, at least two modulation symbols of each of the transmitting ends from the multiplexing symbols of at least two time slots corresponding to each of the transmitting ends. Demodulating the at least two modulation symbols obtained from the at least two time slots according to the codebook to obtain a bit group. According to the bit group, the sender data is acquired.
  • the codebook indicates a correspondence between a bit group and a modulation symbol and a correspondence between a modulation symbol and a time slot.
  • the instruction may be configured to: obtain at least two of each of the transmitting ends from the multiplexing symbols of at least two time slots corresponding to each of the transmitting ends according to the correspondence between the modulation symbols and the time slots indicated by the codebook Modulating a symbol, and demodulating the at least two modulation symbols obtained from the at least two time slots according to a correspondence between a modulation symbol and a bit group indicated by the codebook, to obtain a bit group.
  • the number of time slots of the frame is the same as the number of time slots corresponding to the codebook set to which the codebook belongs .
  • the length of the time slot of the frame is equally divided, or the length of the time slot of the frame may not be equally divided.
  • each time slot includes multiple consecutive symbol mapping locations, and the instruction is specifically used to:
  • Receive symbols are sequentially acquired at a plurality of consecutive symbol mapping positions of the time slot, and at least two received symbols acquired at corresponding positions of the time slots are used for common demodulation acquisition bit groups.
  • the codebook is composed of a plurality of codewords, where the codeword is a multi-dimensional complex vector, the codeword At least one zero symbol and at least one non-zero symbol are included.
  • FIG. 1 is a communication scenario diagram to which an embodiment of the present application is applied.
  • FIG. 2 is a schematic flow chart of a signal transmission apparatus according to an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of signal processing according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of resource mapping of each codebook according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of symbol mapping according to a correspondence between a modulation symbol and a time slot indicated by a codebook according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of signal processing according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of time-frequency resource allocation according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of time-frequency resource allocation according to an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a signal transmission method according to an embodiment of the present application.
  • FIG. 10 is a schematic flowchart of a signal transmission method according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a signal transmission device according to an embodiment of the present application.
  • FIG. 12 is a schematic block diagram of a signal transmission apparatus according to an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a signal transmission apparatus according to an embodiment of the present application.
  • FIG. 14 is a schematic block diagram of a signal transmission apparatus according to an embodiment of the present application.
  • a component can be, but is not limited to being, a process running on a processor, a processor, an object, an executable, a thread of execution, a program, and/or a computer.
  • an application running on a computing device and a computing device can be a component.
  • One or more components can reside within a process and/or execution thread, and the components can be located on one computer and/or distributed between two or more computers.
  • these components can execute from various computer readable media having various data structures stored thereon.
  • a component may, for example, be based on signals having one or more data packets (eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems) Communicating by local and/or remote processes, the one or more data packets may be, for example, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as by signaling and others System interaction internet.
  • one or more data packets eg, data from two components interacting with another component between the local system, the distributed system, and/or the network, such as the Internet interacting with other systems
  • a terminal device may also be called an access terminal, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal, a wireless communication device, a user agent, or a user device.
  • the access terminal may be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), and a wireless communication.
  • the network device can be used to communicate with the mobile device, and the network device can be a GSM (Global System of Mobile communication) or a BTS (Base Transceiver Station) in CDMA (Code Division Multiple Access). It may be an NB (NodeB, base station) in WCDMA (Wideband Code Division Multiple Access), or an eNB or an eNodeB (Evolutional Node B) in LTE (Long Term Evolution). ), or a relay station or access point, or an in-vehicle device, a wearable device, and a network device in a future 5G network.
  • GSM Global System of Mobile communication
  • BTS Base Transceiver Station
  • CDMA Code Division Multiple Access
  • NB NodeB, base station
  • WCDMA Wideband Code Division Multiple Access
  • eNB or an eNodeB Evolutional Node B
  • LTE Long Term Evolution
  • a computer readable medium can include, but is not limited to: magnetic storage devices, optical disks, smart cards And a flash memory device, wherein the magnetic storage device can be, for example, a hard disk, a floppy disk, or a magnetic tape.
  • the optical disk can be, for example, a CD (Compact Disk), a DVD (Digital Versatile Disk, a digital versatile disk, etc.
  • the smart card and the flash memory device can be, for example, EPROM (Erasable Programmable Read-Only Memory), card, stick or key drive, etc.
  • the various storage media described herein may represent one or more devices for storing information and/or Or other machine readable medium.
  • the term "machine readable medium" may include, but is not limited to, a wireless channel and various other mediums capable of storing, containing and/or carrying instructions and/or data.
  • the communication system 100 includes a network device 102, which may include multiple antenna groups.
  • Each antenna group may include one or more antennas, for example, one antenna group may include antennas 104 and 106, another antenna group may include antennas 108 and 110, and an additional group may include antennas 112 and 114.
  • Two antennas are shown in Figure 1 for each antenna group, although more or fewer antennas may be used for each group.
  • Network device 102 may additionally include a transmitter chain and a receiver chain, as will be understood by those of ordinary skill in the art, which may include various components related to signal transmission and reception, such as processors, modulators, multiplexers, solutions. Tuner, demultiplexer or antenna.
  • Network device 102 can communicate with a plurality of terminal devices, for example, network device 102 can communicate with terminal device 116 and terminal device 122. However, it will be appreciated that network device 102 can communicate with any number of terminal devices similar to terminal device 116 or 122.
  • Terminal devices 116 and 122 may be, for example, cellular telephones, smart phones, portable computers, handheld communication devices, handheld computing devices, satellite radios, global positioning systems, PDAs, and/or any other suitable for communicating over wireless communication system 100. device.
  • terminal device 116 is in communication with antennas 112 and 114, wherein antennas 112 and 114 transmit information to terminal device 116 over forward link 118 and receive information from terminal device 116 over reverse link 120.
  • terminal device 122 is in communication with antennas 104 and 106, wherein antennas 104 and 106 transmit information to terminal device 122 over forward link 124 and receive information from terminal device 122 over reverse link 126.
  • the forward link 118 can utilize a different frequency band than that used by the reverse link 120, and the forward link 124 can utilize the reverse link. 126 different frequency bands used.
  • FDD Frequency Division Duplex
  • the forward link 118 and the reverse link 120 can use a common frequency band, a forward link 124, and a reverse link.
  • Link 126 can use a common frequency band.
  • Each set of antennas and/or regions designed for communication is referred to as a sector of network device 102.
  • the antenna group can be designed to communicate with terminal devices in sectors of the network device 102 coverage area.
  • the transmit antenna of network device 102 may utilize beamforming to improve the signal to noise ratio of forward links 118 and 124.
  • the network device 102 uses beamforming to transmit signals to the randomly dispersed terminal devices 116 and 122 in the relevant coverage area, the network device 102 uses a single antenna to transmit signals to all of its terminal devices. Mobile devices are subject to less interference.
  • network device 102, terminal device 116, or terminal device 122 may be a wireless communication transmitting device and/or a wireless communication receiving device.
  • the wireless communication transmitting device can encode the data for transmission.
  • the wireless communication transmitting device may acquire a certain number of data bits to be transmitted to the wireless communication receiving device through a channel, for example, the wireless communication transmitting device may generate, receive from another communication device, or save in a memory, etc., to be transmitted through a channel.
  • Such data bits can contain In a transport block or a plurality of transport blocks of data, the transport block can be segmented to produce a plurality of code blocks.
  • multiple terminal devices may multiplex the same time-frequency resource with the network device for transmission. Therefore, the network device may perform data transmission with multiple terminal devices at the same time, because the network device and each terminal device transmit data.
  • the process is similar. For ease of understanding and description, the following describes an example of a process of transmitting data by using one of a network device and a plurality of terminal devices.
  • FIG. 2 is a schematic flowchart of a signal transmission method 200 according to an embodiment of the present application.
  • the method can be applied to a 5G communication system, and can be specifically applied to an M2M communication service in a large-scale MTC communication scenario in a 5G communication system, including but not limited to smart meter reading, smart grid, security monitoring, forest protection, intelligent transportation. And electronic medical and so on.
  • the method 200 can be performed by a communication device, which can be a terminal device or a base station.
  • the embodiment of the present application mainly describes the method 200 performed by a terminal device as an example.
  • the communication device obtains a group of bits from its own to-be-transmitted bitstream, optionally including at least two bits.
  • the communication device modulates the set of bits to obtain at least two modulation symbols.
  • the communications device maps each of the at least two of the modulation symbols to a corresponding time slot in a frame.
  • the communication device transmits the mapped at least two of the modulation symbols.
  • each time slot includes a plurality of consecutive modulation symbol mapping positions for mapping modulation symbols obtained by multiple bit groups of the to-be-transmitted bit stream.
  • the communication device may take a unit of a bit group from the to-be-transmitted bitstream to perform modulation processing, and each bit group may include at least two bits, and the specific number of bits in the bit group and subsequent modulation
  • the codebook used is related.
  • each group of bits may comprise at least one bit, each group of bits may be modulated as a whole to obtain at least two modulation symbols.
  • the following processing may also be performed: adding a Cyclic Redundancy Check (CRC) to the transport block (TB) to block the transport block. Multiple sub-blocks are obtained and a CRC check, channel coding, rate ratio, and code block concatenation are added to each sub-block.
  • CRC Cyclic Redundancy Check
  • the information bit sequence of the user equipment to be transmitted is a 0 , a 1 , . . . , a A-1 , and the length is A.
  • a CRC check is added to the information bits to be transmitted to obtain sequences b 0 , b 1 , . . . , b B-1 .
  • the information bits to be sent after adding the CRC check are segmented according to the length B, divided into K blocks, and a CRC check is added again for each sub-block to obtain a sequence.
  • each block is then sent to a channel coder, such as a turbo coder for channel coding, and the coded output is In 304, rate matching is performed according to a given code rate, and the output is In 305, the rate matching result is code-fast cascaded to obtain the sequence f 0 , f 1 , . . . , f G-1 , that is, the bit stream to be transmitted mentioned in 201.
  • a channel coder such as a turbo coder for channel coding
  • the terminal device may determine that the codebook is used to perform modulation processing on the data, where the terminal The device may determine the codebook from the codebook set, or may determine the pre-designated codebook from the configuration information.
  • the codebook mentioned in the embodiment of the present application is a codebook in a codebook set, and the codebook set can have various specifications, such as a 6x4 codebook, a 12x8 or a 24x8 codebook, and the like.
  • 6x4 codebook set it means that there are 6 codebooks in the current system frame for the transmitting end to select for data modulation, and there are 4 equal-length data transmission slots (slots); if 12x8 codebooks are selected
  • the set means that 12 codebooks in the current system frame are selected for data modulation by the transmitting end, and there are 8 equal-length data transmission slots.
  • the codebook used by the terminal device for performing modulation processing may be a codebook selected by the terminal device from the codebook set, or may be a codebook pre-configured in the terminal device.
  • the codebook mentioned in the embodiment of the present application is composed of a plurality of codewords, the codeword is a multi-dimensional complex vector, and the codeword includes at least one zero symbol and at least one non-zero symbol.
  • the codebook mentioned in the embodiment of the present application may be referred to as a Sparse Code Multiple Access (SCMA) codebook.
  • SCMA Sparse Code Multiple Access
  • the codebook in the embodiment of the present application may have another name.
  • SCMA is a new multiple access method.
  • multiple users multiplex the same time-frequency resource block for data transmission.
  • one SCMA codebook has a length L, that is, L modulation symbols are required to map a data block of a set of S bits.
  • One subframe is divided into L slots, each slot can accommodate M modulation symbols, so M*L modulation symbols can be mapped in one subframe.
  • the symbol in the first slot is the first symbol of the modulation symbol mapped by the data block of all S bits
  • the symbol in the second slot is the modulation symbol of the data mapping of all S bits.
  • the second symbol, and so on, the symbols in the Lth time slot are the Lth symbols of the modulation symbols of the data maps of all S bits.
  • each time slot includes a plurality of consecutive modulation symbol mapping positions for mapping multiple bits of the bit stream to be transmitted.
  • the modulation symbols obtained by the bit group can make the transmitted symbols continuous in time, avoiding the mapping of different modulation symbols modulated by the same bit group to the same time slot by the transmitting end, and the modulation obtained by mapping one bit group in the time domain.
  • the symbol re-mapping the modulation symbols obtained by another bit group causes frequent RF ON/OFF (on/off) problems, which can avoid excessive power consumption at the transmitting end, especially for communication scenarios where a large number of packets are transmitted.
  • the order of each of the modulation symbols in the plurality of consecutive modulation symbol mapping positions is consistent with the order of the corresponding bit groups in the to-be-transmitted bit stream. For example, if the position of the bit stream is the nth position in the order of the bit stream, the position occupied by the modulation symbol generated by the bit group is also the nth position of the modulation symbol in the corresponding time slot. Thereby, the receiving end can directly obtain the original data according to the position of the symbol, and realize simple decoding.
  • the number of time slots of the frame is the same as the number of time slots corresponding to the codebook set to which the codebook belongs; when the number of time slots of the frame is greater than the mapping of the at least two modulation symbols obtained by the modulation The number of slots; and the ratio of the number of slots of the frame to the number of terminals is smaller than the number of slots mapped by the modulation of at least two modulation symbols, wherein the number of terminals refers to the number of terminals using the codebooks in the same codebook set.
  • the number of timeslots corresponding to the codebook set to which the codebook belongs refers to the number of time slots that may be mapped by all codebooks in the codebook set.
  • the sum of the quantities, the number of time slots mapped by the modulation of at least two modulation symbols is the number of time slots mapped by each codebook.
  • the number of time slots corresponding to the 6x4 codebook set is 4, and the number of time slots mapped by each codebook is 2.
  • the time slot length of the frame is equally divided.
  • the slot length of the frame can also be unequal.
  • the codebook in this application indicates the correspondence between the bit group and the modulation symbol and the correspondence between the modulation symbol and the time slot.
  • the correspondence between the bit group and the modulation symbol is sometimes referred to as a bit-symbol mapping relationship
  • the correspondence relationship between the modulation symbol and the time slot is referred to as a symbol-slot mapping relationship for convenience of description and not limitation.
  • the communications device may modulate the bit group according to the codebook indication bit-symbol mapping relationship to obtain at least two modulation symbols; and the communication device may according to the symbol-slot mapping relationship.
  • Each of the at least two of the modulation symbols is mapped to a corresponding time slot in the frame.
  • bit-symbol mapping relationship and the symbol-slot mapping relationship are described below by taking the 6x4 codebook set as an example.
  • the codebook of the present application may further indicate a symbol-slot mapping relationship for indicating a time slot to which the mapped symbol should correspond.
  • the slot index corresponding to the six codebooks in the 6x4 codebook set can be as shown in Table 2:
  • Table 2 shows different time slots that different codebooks can correspond to, that is, the modulation symbols of different codebooks are mapped to corresponding time slots, which means that the codebook can indicate a symbol-slot mapping relationship, that is, Indicates the modulation symbol and time Correspondence of gaps.
  • Block which, will To map to the symbol of the first assigned time slot, A symbol that maps to the second assigned time slot.
  • Complex domain symbol It should be mapped in order from d (q) (0) to the physical resource blocks for which each time slot is not used for pilot transmission.
  • the two allocated time slots correspond to the available resource time slots according to Table 2.
  • a is the time slot index of the first allocated time slot
  • b is the second allocated time slot. Index, the specific mapping can be seen in Figure 4.
  • the mapping position corresponding to each codebook in the 6x4 codebook set is shown in FIG.
  • the gray block in the figure represents the slot number of the modulation symbol generated after encoding using the codebook in a single system frame.
  • the first gray block represents that S1(xx) needs to be placed in the first time slot in the system frame
  • the second gray block represents that S2(xx) needs to be placed in the system frame.
  • the second gray block represents that S1(xx) needs to be placed in the second time slot in the system frame
  • the second gray block represents that S2(xx) needs to be placed in the system frame.
  • On the third time slot On the third time slot.
  • the time slots corresponding to other codebooks are shown in the figure and will not be explained here.
  • the following describes how the terminal device modulates the transmitted bit stream by assuming that the terminal device selects the codebook 1 in FIG. 3 in conjunction with FIG.
  • the terminal device selects two consecutive bits from the bit stream to be transmitted, for example, the first bit group "01" in FIG. After the selected two bits are mapped by the selected codebook, a set of two modulation symbols are generated: S1 (01), S2 (01); the terminal device selects the generated S1 (01) according to the order of the bit stream. , placed at the first symbol position of slot 1 in the system frame indicated by the selected codebook, and S2 (01) is placed at the first symbol position of slot 3 in the system frame. The terminal device continues to select two consecutive bits, for example, the second bit group "11" in the figure, and the selected two bits are mapped by the selected codebook to generate a set of two modulation symbols: S1 (11) ), S2 (11).
  • the generated modulation symbols S1(11), S2(11) are also arranged on the slot 1 and slot 3 indicated by the selected codebook, and are respectively arranged in sequence in S1(01), S2(01). after that.
  • the terminal device continues to select two consecutive ratios, for example, the third bit group "10" in FIG.
  • the selected two bits are mapped by the selected codebook to generate a set of two modulation symbols: S1(10), S2(10).
  • the generated modulation symbols S1(10), S2(10) are also arranged on the slot 1 and slot 3 indicated by the selected codebook, and are sequentially arranged in S1(11), S2(11), respectively. after that.
  • the processing of subsequent bits in the bitstream is the same as the data modulation and resource mapping process described above.
  • Each of the plurality of terminal devices may implement multiplexing of time domain resources after performing the processing procedure as shown in FIG. 5. For example, as shown in FIG. 6, after a plurality of terminal devices UE1, UE2, UE3, UE4, ..., UEn select a codebook in the codebook set to perform modulation processing and resource mapping processing, the same data frame may be used for output transmission, after modulation. It can perform root-raised cosine pulse shaping processing, digital up-conversion processing and RF processing.
  • the embodiment of the present application may use a single carrier to transmit the mapped modulation symbols, that is, use a single carrier instead of multiple carriers to transmit the mapped modulation symbols. Transmitting the mapped modulation symbols through a single carrier can make the receiving end have the advantages of simple structure, wide coverage, and low PAPR of the time domain signal at the transmitting end.
  • a subcarrier may be selected from a plurality of subcarriers as a single carrier, and the multiple subcarriers constitute a continuous spectrum.
  • the plurality of single carriers may have the same carrier width, or there may be two or more subcarriers having different carrier widths.
  • FIG. 7 shows a resource partitioning diagram of time slots and subcarriers having the same carrier width.
  • the independent codebook set is used on different subcarriers, that is, the codebook set 1, the codebook set 2, the codebook set 3, and the codebook set N. These codebook sets may be the same or different.
  • a single system frame is divided into different numbers of multiple equal-length time slots on different sub-carriers according to different specifications of the codebook set used.
  • a terminal device can only use one subcarrier to transmit data, and select a codebook in the corresponding codebook set on the subcarrier to process the data using the method shown in FIG. 1 and FIG.
  • FIG. 8 shows a resource partitioning diagram of time slots and subcarriers having different carrier widths.
  • the independent codebook set is used on different subcarriers, that is, the codebook set 1, the codebook set 2, the codebook set 3, and the codebook set N. These codebook sets may be the same or different.
  • a single system frame is divided into different numbers of multiple equal-length time slots on different sub-carriers according to different specifications of the codebook set used.
  • one terminal device occupies only one subcarrier to transmit data, and selects the codebook in the corresponding codebook set on the subcarrier to process the data using the method shown in FIG. 1 and FIG.
  • the terminal device may select the subcarrier according to its own required transmission rate and/or the distance from the receiving end. For example, the farther the terminal is from the base station, the narrower the carrier width is chosen, because at this time the same energy is distributed over a narrower spectrum and can be transmitted further. When the distance from the base station is closer, the transmission distance is not so high. At this time, the terminal can appropriately select a wider carrier width and spread the energy over a wider frequency band for higher rate with the base station. Communication rate.
  • the communications device may also determine the used codebook set from the time domain resources to be used for transmitting data. For example, in a certain four time slots, one 6x4 codebook set is used, and in the next four time slots, another 6x4 codebook set is used.
  • the communication device can also determine the used codebook set from the subcarriers and time domain resources used to transmit the data. For example, the selected subcarrier indicates that the specification of the codebook set used is 6x4, but it may be specifically determined which 6x4 codebook set to use according to the time domain resources used.
  • a certain terminal device acquires modulation symbols according to a codebook, and maps the modulation symbols to corresponding resources and transmits them to the network device.
  • a plurality of terminal devices that is, terminal device #1, terminal device #2, terminal device #3, and terminal device #4, may be selected from a certain codebook set.
  • the codebook obtains modulation symbols, and maps the modulation symbols to corresponding resources and sends them to the network device.
  • the operations specifically performed by each terminal device can refer to the above description.
  • terminal device #1 acquires at least two modulation symbols based on a bit group and a codebook
  • terminal device #1 maps different modulation symbols obtained by the same bit group to different The time slot is sent to the terminal device.
  • the terminal device #2 acquires at least two modulation symbols based on the bit group and the codebook.
  • terminal device #2 maps different modulation symbols obtained by the same bit group to different time slots and transmits them to the terminal device.
  • the terminal device #3 acquires at least two modulation symbols based on the bit group and the codebook.
  • terminal device #3 maps different modulation symbols obtained by the same bit group to different time slots and transmits them to the terminal device.
  • Modulation symbols form a multiplex symbol.
  • the network device may obtain modulation symbols of each terminal device from the multiplex symbol. For details on how to obtain, reference may be made to the description about FIG.
  • FIG. 10 is a schematic flowchart of a signal transmission method 300 according to an embodiment of the present application.
  • the method can be applied to a 5G communication system, and can be specifically applied to an M2M communication service in a large-scale MTC communication scenario in a 5G communication system, including but not limited to smart meter reading, smart grid, security monitoring, forest protection, intelligent transportation. And electronic medical and so on.
  • the method can be performed by a communication device, such as a network device, in particular a base station.
  • a network device in particular a base station.
  • the following mainly describes a network device as an example, but the application is not limited thereto.
  • the communication device receives the multiplexed symbols in each slot of the frame, and the multiplexed symbols are multiplexed with modulation symbols of the plurality of transmitting ends.
  • the device acquires at least two modulation symbols of each transmitting end from the multiplexed symbols of at least two time slots corresponding to each of the transmitting ends according to the codebook.
  • the communication device demodulates the at least two modulation symbols obtained from at least two time slots to obtain a bit group.
  • the communication device acquires the sender data according to the bit group.
  • the network device may detect the pilot corresponding to the transmission data of the current subframe, and then determine all the codebooks that may be used according to the correspondence between the pilot and the codebook. Then, the network device may respectively extract the received symbols from the corresponding positions of each of the at least two time slots of the codebook mapping according to the symbol-slot mapping relationship, and form a data block, where each data block is a plurality of transmitting ends.
  • the SCMA modulation codewords of the users are subjected to channel superimposed reception signals, and the receiver uses such data blocks as a basic decoding unit. Then, the modulation symbols can be SCMA-coded according to the bit-symbol mapping relationship of the codebook to obtain a corresponding bit group.
  • SCMA decoding uses a decoding algorithm called Message Passing Algorithm (MPA).
  • MPA Message Passing Algorithm
  • the decoding mode of MPA can be regarded as a process of message transmission.
  • “message” refers to a guess of the modulation symbols used by the SCMA encoder at the transmitting end.
  • Each user and the SCMA coded base unit use the SCMA modulation symbols to establish a relationship between the used time slot resources, and then iteratively pass the "guess" of each modulation symbol between the user and the time slot resources, in the iterative process.
  • the reliability of these "guess” changes until the maximum number of iterations of the system is reached.
  • the message passing algorithm increases the credibility of these "guess” and achieves reliable decoding.
  • each time slot of the frame includes a plurality of consecutive modulation symbol receiving positions.
  • the base station sequentially acquires modulation symbols in each time slot, and the modulation symbols acquired at corresponding positions of the at least two time slots are used to jointly demodulate the acquired bit groups.
  • FIG. 11 is a schematic block diagram of a communication device 400 including an acquisition unit 410, a modulation unit 420, a mapping unit 430, and a transmission unit 440, as shown in FIG.
  • the obtaining unit 410 is configured to obtain a bit group from the to-be-transmitted bit stream.
  • the bit group includes at least two bits.
  • the modulating unit 420 is configured to, according to the codebook, the communication device to modulate the bit group to obtain at least two modulation symbols.
  • the mapping unit 430 is configured to map each of the at least two modulation symbols to a corresponding time slot in the frame.
  • the sending unit 440 is configured to send the mapped at least two modulation symbols, where different modulation symbols obtained by the same bit group are mapped to different time slots, and each time slot includes multiple consecutive modulation symbol mapping positions, where A modulation symbol obtained by a plurality of bit groups of the bit stream to be transmitted is mapped.
  • the codebook indicates a correspondence between a bit group and a modulation symbol and a correspondence between a modulation symbol and a time slot.
  • the ordering of each of the modulation symbols in the plurality of consecutive modulation symbol mapping positions is consistent with the ordering of the corresponding bit groups in the to-be-transmitted bitstream.
  • the number of time slots of the frame is the same as the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the time slot length of the frame is equally divided, or the time slot length of the frame may be unequal.
  • the sending unit 430 is specifically configured to: send the mapped at least two of the modulation symbols by using a single carrier.
  • the apparatus 400 further includes: a selecting unit 450, configured to select a subcarrier from the plurality of subcarriers as the single carrier, to send the mapped at least two of the modulation symbols, Wherein, the plurality of subcarriers constitute a continuous spectrum.
  • the codebook used can be determined from the codebook set corresponding to the selected subcarrier.
  • the device 400 is a terminal device.
  • the acquisition unit 410, the modulation unit 420, and the mapping unit 430 belong to the processor, that is, these units are implemented by a processor.
  • the optional selection unit 450 also belongs to the processor.
  • the communication device 400 may correspond to the communication device in the method 200 in the embodiment of the present application, and the above operations and/or functions of the respective units in the communication device 400 may be used to perform the above method.
  • the various processes and/or steps corresponding to the terminal device in the embodiment are not repeated herein to avoid repetition.
  • FIG. 12 is a schematic block diagram of a signal transmission device 500 according to an embodiment of the present application. As shown in FIG. 12, the device 500 includes a receiving unit 510 and an acquisition unit 520.
  • the receiving unit 510 receives the multiplexed symbols in each time slot in the frame, and the multiplexed symbols are multiplexed with modulation symbols of the plurality of transmitting ends.
  • the obtaining unit 520 is configured to acquire, according to the codebook, at least two modulation symbols of each of the transmitting ends from the multiplexing symbols of the at least two time slots corresponding to each of the sending ends, and according to the codebook, the slave code Deriving the at least two modulation symbols of the at least two time slots to obtain a bit group; and acquiring data at the transmitting end according to the bit group.
  • the number of time slots of the frame is the same as the number of time slots corresponding to the codebook set to which the codebook belongs.
  • the time slot length of the frame is equally divided, or the time slot length of the frame may be unequal.
  • the codebook indicates a correspondence between a bit group and a modulation symbol and a correspondence between a modulation symbol and a time slot.
  • each time slot includes a plurality of consecutive symbol mapping locations
  • the second obtaining unit 520 is specifically configured to:
  • Receive symbols are sequentially acquired at a plurality of consecutive symbol mapping positions of each of the time slots, and received symbols acquired at corresponding positions corresponding to at least two of the time slots are used for common demodulation acquisition bit groups.
  • the communication device 500 is a network device, such as a base station.
  • the obtaining unit 510 may belong to a processor, that is, the unit is implemented by a processor.
  • the communication device 500 may correspond to the communication device in the method 300 in the embodiment of the present application, and the above operations and/or functions of the respective units in the communication device 500 may be used to perform the above method.
  • the various processes and/or steps corresponding to the terminal device in the embodiment are not repeated herein to avoid repetition.
  • FIG. 13 is a schematic block diagram of a signal transmission device 600 including a processor 610, a memory 620, and a transceiver 630, in accordance with an embodiment of the present application.
  • the memory 620 is configured to store program instructions.
  • Processor 610 can invoke program instructions stored in memory 620, and can perform one or more of the steps of the embodiment shown in FIG. 2, or alternative embodiments thereof.
  • the processor 610 acquires a bit group from the to-be-transmitted bitstream, where the bit group includes at least two bits; based on the codebook, the communication device modulates the bit group to obtain at least two modulation symbols; At least two Each of the modulation symbols is mapped to a corresponding time slot in a frame; the mapped at least two of the modulation symbols are transmitted by the transceiver 630; wherein different modulation symbol mappings obtained by the same bit group To different time slots, each time slot includes a plurality of consecutive modulation symbol mapping locations for mapping modulation symbols derived from a plurality of bit groups of the bitstream to be transmitted.
  • the processor 610 communicates by using the single carrier utilization transceiver 630 to transmit the mapped at least two of the modulation symbols.
  • the processor 610 selects a subcarrier from the plurality of subcarriers as the single carrier, to send the mapped at least two of the modulation symbols, where the plurality of the subcarriers constitute a continuous spectrum.
  • the codebook can be determined from the codebook set corresponding to the selected subcarrier.
  • the communication device 600 may further include a bus system 640, and the processor 610, the memory 620, and the transceiver 630 are connected by a bus system 640.
  • the communication device 600 is optionally a terminal device.
  • the memory may include a volatile memory such as a random-access memory (RAM); the memory may also include a non-volatile memory such as a flash memory.
  • RAM random-access memory
  • non-volatile memory such as a flash memory.
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory may also include a combination of the above types of memories.
  • FIG. 14 is a schematic block diagram of a signal transmission device 600 including a processor 710, a memory 720, and a transceiver 730, in accordance with an embodiment of the present application.
  • the memory 720 is configured to store program instructions.
  • the processor 710 can invoke program instructions stored in the memory 720, and can perform one or more of the steps of the embodiment shown in FIG. 9, or an alternative embodiment thereof.
  • the device 700 is optionally a network device, such as a base station.
  • the processor 710 receives, by using the transceiver 730, a multiplexing symbol in each time slot in the frame, where the multiplexing symbol is multiplexed with modulation symbols of multiple transmitting ends; according to the codebook, corresponding to each of the transmitting ends Acquiring at least two modulation symbols of each of the transmitting ends in a multiplexing symbol of at least two time slots; demodulating the at least two modulation symbols from the at least two time slots according to the codebook Obtaining a bit group; and acquiring data of the transmitting end according to the bit group.
  • the communication device 700 may further include a bus system 740, and the processor 710, the memory 720, and the transceiver 730 are connected by a bus system 740.
  • the processor 710, the memory 720, and the transceiver 730 can also be connected by other means, such as a direct connection.
  • the communication device 700 is optionally a terminal device.
  • the processor 610 or 710 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • Processor 610 can also further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof. .
  • the bus system 640 or 740 may include a power bus, a control bus, a status signal bus, and the like in addition to the data bus.
  • the bus system 640 or 740 is shown with only one thick line, but does not mean that there is only one bus or one type of bus.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device, which may be a personal computer, server, or network device, to perform all or part of the steps of the methods described in various embodiments of the present application.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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Abstract

本申请实施例提供了一种信号传输方法，包括：通信设备从待发送比特流中获取比特组，所述比特组包括至少两个比特；基于码本，所述通信设备对所述比特组进行调制，得到至少两个调制符号；所述通信设备将至少两个所述调制符号中的每个所述调制符号映射到帧中对应的时隙；所述通信设备发送映射后的至少两个所述调制符号；其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由所述待发送比特流的多个比特组得到的调制符号。本申请实施例可以降低发送端传输功耗，尤其适用于5G通信***下巨量传输通信场景。

Description

信号传输方法和装置 技术领域
本申请涉及通信领域，并且更具体地，涉及一种信号传输方法和装置。
背景技术
相比于***通信***(4G)，第五代通信***(5G)包含的应用场景更为广泛，除了传统的移动通信场景，还可能包含车联网，物联网等不以人为中心的通信场景。5G对以物联网为代表的MTC(Machine Type Communication)***的整合为预示下一代通信***将会存在巨量连接。在这些巨量连接场景中，除了人与人(Human-to-Human，H2H)外，更多的是以物为中心的通信，即所谓的MTC***。由于巨量小包传输易导致发送端功耗过大的问题，因此，亟待提供一种信号传输方法降低发送端传输功耗。
发明内容
本申请实施例提供了一种信号传输方法和装置，可以降低发送端传输功耗，尤其适用于5G通信***下巨量传输通信场景。
第一方面，提供了一种信号传输方法，包括如下步骤：通信设备从待发送比特流中获取比特组。基于码本，该通信设备对该比特组进行调制，得到至少两个调制符号。该通信设备将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。该通信设备发送映射后的至少两个该调制符号。其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由该待发送比特流的多个比特组得到的调制符号。
在本申请实施例中，将同一比特组得到的不同的调制符号映射到不同的时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由待发送比特流的多个比特组得到的调制符号，可以使得发送的符号在时间上连续，避免发送端射频频繁ON/OFF(开/关)的问题，可以避免发送端功耗过大，尤其适用于巨量小包传输的通信场景。
结合第一方面，在第一方面的第一种可能的实现方式中，码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
可选地，在本申请实施例中，通信设备可以根据码本表明的比特组和调制符号的对应关系，对该比特组进行调制，得到至少两个调制符号。以及通信设备可以根据码本表明的调制符号和时隙的对应关系，将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。
结合第一方面或其任意可能的实现方式，在第一方面的第二种可能的实现方式中，该码本包括多个码字，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
本申请实施例提到的码本可以称为稀疏码分多址(SCMA，Sparse Code Multiple Access)码本，当然，本申请实施例中的码本也可以有别的名称。
结合第一方面或其任一种可能的实现方式，在第一方面的第三种可能的实现方式中，每个该调制符号在该多个的连续调制符号映射位置中的排序，与对应的比特组在该待发送比特流中的排序一致。由此可以使得接收端直接按照符号的位置就可以得到原始 数据，实现简单解码。
结合第一方面或其任一种可能的实现方式，在其第四种可能的实现方式中，该帧的时隙数量与该码本所属的码本集对应的时隙数量相同。其中，码本所属的码本集对应的时隙数量是指码本集中所***本可能映射的时隙数量的总和。例如，6x4码本集对应的时隙数量为4，每个码本所映射的时隙数量为2。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
在本申请实施例中，终端可以从码本集中确定码本。例如，终端可以从码本集中随机选择码本。
结合第一方面或其任一种可能的实现方式，在其第五种可能的实现方式中，通信设备可以通过单载波发送映射后的至少两个该调制符号。也即采用单个载波发送映射后的至少两个该调制符号。
本申请实施例可以采用单载波发送映射后的调制符号。通过单载波发送映射后的调制符号可以使得接收端具有单载波***结构简单，覆盖广，发送端时域信号具有低峰值平均功率比(Peak to Average Power Ratio，PAPR)的优势。
结合第一方面的第五种可能的实现方式，在第一方面的第六种可能的实现方式中，通信设备可以从多个子载波中选择子载波作为该单载波，以发送映射后的至少两个该调制符号，其中，多个该子载波组成连续频谱。该多个单载波可以具有相同的载波宽度，或存在两个以上的子载波具有不同的载波宽度，其中，载波宽度指载波的带宽，也就是调制载波占据的频率范围，也即该载波的最大频率与最小频率的差值，例如，子载波1的载波宽度为[10M 20M]，子载波2的载波宽度为[30M 40M]，则认为子载波1和子载波2具有相同的载波宽度。通信设备可以从选择的子载波对应的码本集确定传输数据所采用的码本。
可选地，在本申请实施例中，每个子载波对应的码本集可以相同，也可以不相同。
可选地，不同子载波上根据所使用的码本集的规格的不同，将单个***帧划分为不同数量的多个等长的时隙。单个***帧内，一个终端设备可以只占用一个子载波发送数据，并且选用该子载波上对应的码本集中的码本对数据进行处理。
可选地，在本申请实施例中，上述多个子载波的宽度可以相同，也可以不相同。在子载波的宽带相同时，终端设备可以根据自身所需传输速率和离接收端的距离来选择子载波。例如，当终端离基站的距离愈远时，选择较窄的载波宽度，因为这个时候相同的能量分布在更窄的频谱上，可以传送的更远。当离基站的距离越近的时候，传送距离并没有那么高的要求，这个时候终端可以适当选择更宽的载波宽度，将能量散布在更宽的频带上，用于和基站进行更高速率的通信速率。
可选地，在本申请实施例中，通信设备也可以从传输数据将要采用的时域资源来确定所使用的码本集。例如，在某四个时隙中，采用一个6x4的码本集，在下四个时隙中，采用另一个6x4的码本集。通信设备也可以从传输数据所采用的子载波和时域资源来通过确定所使用的码本集。例如，选择的子载波指示采用的码本集的规格是6x4，但是可以根据所采用的时域资源，来具体确定采用哪个6x4的码本集。
结合第一方面或其任一种可能的实现方式，该通信设备为终端设备。
第二方面，提供了一种信号传输方法，包括如下步骤：通信设备在帧中每个时隙接收复用符号，复用符号复用有多个发送端的调制符号。通信设备根据码本，从每个所述 发送端对应的至少两个时隙的复用符号中获取每个发送端的至少两个调制符号。根据码本，所述通信设备对从所述至少时隙得到的所述至少两个调制符号进行解调，得到比特组。根据该比特组，通信设备获取发送端数据。
结合第二方面，在第二方面的第一种可能的实现方式中，码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
可选地，在本申请实施例中，通信设备根据码本表明的调制符号和时隙的对应关系，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号，以及根据码本表明的比特组和调制符号的对应关系，对从所述至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组。
结合第二方面或其任一种可能的实现方式，在第二方面的第二种可能的实现方式中，该帧的时隙数量与该码本所属的码本集对应的时隙数量相同。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第二方面或其任一种可能的实现方式，在第二方面的第三种可能的实现方式中，每个时隙包括多个连续的符号映射位置，该在帧中的至少两个时隙的每个时隙中分别获取调制符号，包括：在每个该时隙的多个连续的符号映射位置依次获取调制符号，每次至少两个该时隙对应位置获取的调制符号用于共同解调获取比特组。
结合第二方面或其任一种可能的实现方式，在第二方面的第四种可能的实现方式中，该码本由多个码字组成，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
结合第二方面或其任一种可能的实现方式，该通信设备为基站。
第三方面，提供了一种帧，包括多个时隙，每个该时隙包括多个连续的调制符号映射位置，用于映射待发送比特流的多个比特组对应的调制符号。每个比特组对应至少两个调制符号，每个比特组对应的调制符号是根据码本对该比特组进行调制得到的。其中，同一比特组得到的不同调制符号映射在不同时隙。
结合第三方面，在第三方面的第一种可能的实现方式中帧包含的时隙的数量为码本所属的码本集对应的时隙数量。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第三方面或其任一种可能的实现方式，在第三方面的第二种可能的实现方式中，该码本包括多个码字，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
第四方面，提供了一种通信设备，包括处理器、存储器和收发器。其中，所述存储器用于存储指令，所述处理器用于调用所述指令执行以下处理：从待发送比特流中获取比特组。基于码本，所述通信设备对所述比特组进行调制，得到至少两个调制符号。将至少两个所述调制符号中的每个所述调制符号映射到帧中对应的时隙。通过所述收发器发送映射后的至少两个所述调制符号。其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由所述待发送比特流的多个比特组得到的调制符号。
结合第四方面，在第四方面的第一种可能的实现方式中，码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
可选地，在本申请实施例中，所述处理器用于调用所述指令执行以下处理：根据码 本表明的比特组和调制符号的对应关系，对该比特组进行调制，得到至少两个调制符号以及根据码本表明的调制符号和时隙的对应关系，将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。
结合第四方面或其上述任一种可能的实现方式，在第四方面的第二种可能的实现方式中，帧包含的时隙的数量为码本所属的码本集对应的时隙数量。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第四方面或其上述任一种可能的实现方式，在第四方面的第三种可能的实现方式中，该处理器用于调用该指令具体执行以下处理：
通过该收发器利用通过单载波发送资源映射后的至少两个该调制符号。
结合第四方面或其上述任一种可能的实现方式，在第四方面的第四种可能的实现方式中，该处理器用于调用该指令具体执行以下处理：从多个子载波中选择子载波作为该单载波，以发送映射后的至少两个该调制符号，其中，多个该子载波组成连续频谱，根据选择的所述子载波对应的码本集中确定所述码本。
结合第四方面或其上述任一种可能的实现方式，在第四方面的第五种可能的实现方式中，每个该调制符号在该多个的连续调制符号映射位置中的排序，与对应的比特组在该待发送比特流中的排序一致。
结合第四方面或其上述任一种可能的实现方式，在第四方面的第六种可能的实现方式中，该码本包括多个码字，该码字为多维复数向量，该码本包括至少一个零符号和至少一个非零符号。
结合第四方面或其上述任一种可能的实现方式，在第四方面的第六种可能的实现方式中，该通信设备为终端设备。
第五方面，提供了一种通信设备，包括处理器、存储器和收发器。其中，该存储器用于存储指令，该处理器用于调用该指令执行以下处理：在通过收发器帧中每个时隙接收复用符号，所述复用符号复用有多个发送端的调制符号。根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号。根据所述码本，对从所述至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组。根据所述比特组，获取发送端数据。
结合第五方面，在第五方面的第一种可能的实现方式中，码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
可选地，在本申请实施例中，该处理器用于调用该指令执行以下处理：根据码本表明的调制符号和时隙的对应关系，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号，以及根据码本表明的比特组和调制符号的对应关系，对从所述至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组。
结合第五方面或其上述任一种可能的实现方式，在第五方面的第二种可能的实现方式中，帧包含的时隙的数量为码本所属的码本集对应的时隙数量。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第五方面或其上述任一种可能的实现方式，在第五方面的第三种可能的实现方式中，每个时隙包括多个连续的符号映射位置，所该处理器用于调用该指令具体执行以下处理：通过该收发器在每个该时隙的多个连续的符号映射位置依次获取接收符号，每次至少两个该时隙对应位置获取的接收符号用于共同解调获取比特组。
结合第五方面或其上述任一种可能的实现方式，在第五方面的第四种可能的实现方式中，该码本由多个码字组成，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
结合第五方面或其上述任一种可能的实现方式，在第五方面的第六种可能的实现方式中，该通信设备为基站。
第六方面，提供了一种通信设备，包括以下获取单元，调制单元，映射单元和发送单元。其中，获取单元，用于从待发送比特流中获取比特组。调制单元，用于基于码本，该通信设备对该比特组进行调制，得到至少两个调制符号。映射单元，用于将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。发送单元，用于发送映射后的至少两个该调制符号。其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由该待发送比特流的多个比特组得到的调制符号。
结合第六方面，在第六方面的第一种可能的实现方式中，码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
可选地，在本申请实施例中，通信设备可以根据码本表明的比特组和调制符号的对应关系，对该比特组进行调制，得到至少两个调制符号以及根据码本表明的调制符号和时隙的对应关系，将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。
结合第六方面或其上述任一种可能的实现方式，在第六方面的第二种可能的实现方式中该帧的时隙数量与该码本所属的码本集对应的时隙数量相同。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第六方面或其上述任一种可能的实现方式，在第六方面的第三种可能的实现方式中，该通信设备通过单载波发送资源映射后的至少两个该调制符号。
结合第六方面或其上述任一种可能的实现方式，在第六方面的第四种可能的实现方式中，在通过单载波发送资源映射后的至少两个该调制符号之前，该方法还包括：从多个子载波中选择子载波作为该单载波，以发送映射后的至少两个该调制符号，其中，多个该子载波组成连续频谱，从选择的所述子载波对应的码本集中确定所述码本。
结合第六方面或其上述任一种可能的实现方式，在第六方面的第五种可能的实现方式中，每个该调制符号在该多个的连续调制符号映射位置中的排序，与对应的比特组在该待发送比特流中的排序一致。
结合第六方面或其上述任一种可能的实现方式，在第六方面的第六种可能的实现方式中，该码本包括多个码字，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
结合第六方面或其上述任一种可能的实现方式，在第六方面的第六种可能的实现方式中，该通信设备为终端设备。
第七方面，提供了一种通信设备，包括接收单元和获取单元。其中，接收单元，在帧中每个时隙接收复用符号，所述复用符号复用有多个发送端的调制符号。获取单元，根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号，根据所述码本，对从所述至少时隙得到的所述至少两个调制符号进行解调，得到比特组，以及根据所述比特组，获取发送端数据。
结合第七方面，在第七方面的第一种可能的实现方式中，码本表明比特组和调制符 号的对应关系以及调制符号和时隙的对应关系。
可选地，在本申请实施例中，获取单元可以根据码本表明的调制符号和时隙的对应关系，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号，以及根据码本表明的比特组和调制符号的对应关系，对从所述至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组。
结合第七方面或其上述任一种可能的实现方式，在第七方面的第二种可能的实现方式中，该帧的时隙数量与该码本所属的码本集对应的时隙数量相同。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第七方面或其上述任一种可能的实现方式，在第七方面的第三种可能的实现方式中，每个时隙包括多个连续的符号映射位置，该在帧中的至少两个时隙的每个时隙中分别获取调制符号，包括：在每个该时隙的多个连续的符号映射位置依次获取接收符号，每次至少两个该时隙对应位置获取的接收符号用于共同解调获取比特组。
结合第七方面或其上述任一种可能的实现方式，在第七方面的第四种可能的实现方式中，该码本由多个码字组成，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
结合第七方面或其上述任一种可能的实现方式，在第七方面的第六种可能的实现方式中，该通信设备为基站。
第八方面，提供了一种存储器，该存储器用于存储计算机可读指令，该指令用于执行以下操作：从待发送比特流中获取比特组。基于码本，对该比特组进行调制，得到至少两个调制符号。将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。发送映射后的至少两个该调制符号。其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由该待发送比特流的多个比特组得到的调制符号。
结合第八方面，在第八方面的第一种可能的实现方式中，码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
可选地，在本申请实施例中，该指令可以执行以下操作：根据码本表明的比特组和调制符号的对应关系，对该比特组进行调制，得到至少两个调制符号以及根据码本表明的调制符号和时隙的对应关系，将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。
结合第八方面或其上述任一种可能的实现方式，在第八方面的第二种可能的实现方式中，该帧的时隙数量与该码本所属的码本集对应的时隙数量相同。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第八方面或其上述任一种可能的实现方式，在第八方面的第三种可能的实现方式中，该指令具体用于：
通过单载波发送资源映射后的至少两个该调制符号。
结合第八方面或其上述任一种可能的实现方式，在第八方面的第四种可能的实现方式中，该指令具体用于：在通过单载波发送资源映射后的至少两个该调制符号之前，从多个子载波中选择子载波作为该单载波，以发送映射后的至少两个该调制符号，其中，多个该子载波组成连续频谱，从选择的子载波对应的码本集中确定码本。
结合第八方面或其上述任一种可能的实现方式，在第八方面的第五种可能的实现方 式中，每个该调制符号在该多个的连续调制符号映射位置中的排序，与对应的比特组在该待发送比特流中的排序一致。
结合第八方面或其上述任一种可能的实现方式，在第八方面的第六种可能的实现方式中，该码本包括多个码字，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
第九方面，提供了一种存储器，该存储器用于存储计算机可读指令，该指令用于执行以下操作：在帧中每个时隙接收复用符号，所述复用符号复用有多个发送端的调制符号。根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号。根据所述码本，对从所述至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组。根据所述比特组，获取发送端数据。
结合第九方面，在第九方面的第一种可能的实现方式中，码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
该指令可以执行以下操作：根据码本表明的调制符号和时隙的对应关系，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号，以及根据码本表明的调制符号和比特组的对应关系，对从所述至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组。
结合第九方面或其上述任一种可能的实现方式，在第九方面的第二种可能的实现方式中，该帧的时隙数量与该码本所属的码本集对应的时隙数量相同。可选地，该帧的时隙长度等分，或帧的时隙长度可以不等分。
结合第九方面或其上述任一种可能的实现方式，在第九方面的第二种可能的实现方式中，每个时隙包括多个连续的符号映射位置，该指令具体用于：
在每个该时隙的多个连续的符号映射位置依次获取接收符号，每次至少两个该时隙对应位置获取的接收符号用于共同解调获取比特组。
结合第九方面或其上述任一种可能的实现方式，在第九方面的第三种可能的实现方式中，该码本由多个码字组成，该码字为多维复数向量，该码字包括至少一个零符号和至少一个非零符号。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是根据本申请实施例所适用的通信场景图。
图2是根据本申请实施例的信号传输装置的示意性流程图。
图3是根据本申请实施例的信号处理的示意性流程图。
图4是根据本申请实施例的各个码本的资源映射示意图。
图5是根据本申请实施例根据码本表明的调制符号和时隙的对应关系进行符号映射的示意图。
图6是根据本申请实施例的信号处理的示意性流程图。
图7是根据本申请实施例的时频资源划分示意性图。
图8是根据本申请实施例的时频资源划分示意性图。
图9是根据本申请实施例的信号传输方法的示意性流程图。
图10是根据本申请实施例的信号传输方法的示意性流程图。
图11是根据本申请实施例的信号传输装置的示意性框图。
图12是根据本申请实施例的信号传输装置的示意性框图。
图13是根据本申请实施例的信号传输装置的示意性框图。
图14是根据本申请实施例的信号传输装置的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本说明书中使用的术语“部件”、“模块”、“***”等用于表示计算机相关的实体、硬件、固件、硬件和软件的组合、软件、或执行中的软件。例如，部件可以是但不限于，在处理器上运行的进程、处理器、对象、可执行文件、执行线程、程序和/或计算机。通过图示，在计算设备上运行的应用和计算设备都可以是部件。一个或多个部件可驻留在进程和/或执行线程中，部件可位于一个计算机上和/或分布在2个或更多个计算机之间。此外，这些部件可从在上面存储有各种数据结构的各种计算机可读介质执行。部件可例如根据具有一个或多个数据分组(例如来自与本地***、分布式***和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它***交互的互联网)的信号通过本地和/或远程进程来通信，该一个或多个数据分组例如可以是来自与本地***、分布式***和/或网络间的另一部件交互的二个部件的数据，例如通过信号与其它***交互的互联网。
本申请结合终端设备和网络设备各个实施例。终端设备也可以称为接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、SIP(Session Initiation Protocol，会话启动协议)电话、WLL(Wireless Local Loop，无线本地环路)站、PDA(Personal Digital Assistant，个人数字处理)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备以及未来5G网络中的终端设备。网络设备可用于与移动设备通信，网络设备可以是GSM(Global System of Mobile communication，全球移动通讯)或CDMA(Code Division Multiple Access，码分多址)中的BTS(Base Transceiver Station，基站)，也可以是WCDMA(Wideband Code Division Multiple Access，宽带码分多址)中的NB(NodeB，基站)，还可以是LTE(Long Term Evolution，长期演进)中的eNB或eNodeB(Evolutional Node B，演进型基站)，或者中继站或接入点，或者车载设备、可穿戴设备以及未来5G网络中的网络设备。
此外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于:磁存储器件，光盘，智能卡 和闪存器件，其中，磁存储器件例如可以是硬盘、软盘或磁带等，光盘例如可以是CD(Compact Disk，压缩盘)，DVD(Digital Versatile Disk，数字通用盘等，智能卡和闪存器件例如可以是EPROM(Erasable Programmable Read-Only Memory，可擦写可编程只读存储器)、卡、棒或钥匙驱动器等。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
图1是本申请实施例所用的通信***的示意图。如图1所示，该通信***100包括网络设备102，网络设备102可包括多个天线组。每个天线组可以包括一个或多个天线，例如，一个天线组可包括天线104和106，另一个天线组可包括天线108和110，附加组可包括天线112和114。图1中对于每个天线组示出了2个天线，然而可对于每个组使用更多或更少的天线。网络设备102可附加地包括发射机链和接收机链，本领域普通技术人员可以理解，它们均可包括与信号发送和接收相关的多个部件，例如处理器、调制器、复用器、解调器、解复用器或天线等。
网络设备102可以与多个终端设备通信，例如，网络设备102可以与终端设备116和终端设备122通信。然而，可以理解，网络设备102可以与类似于终端设备116或122的任意数目的终端设备通信。终端设备116和122可以是例如蜂窝电话、智能电话、便携式电脑、手持通信设备、手持计算设备、卫星无线电装置、全球定位***、PDA和/或用于在无线通信***100上通信的任意其它适合设备。
如图1所示，终端设备116与天线112和114通信，其中天线112和114通过前向链路118向终端设备116发送信息，并通过反向链路120从终端设备116接收信息。此外，终端设备122与天线104和106通信，其中天线104和106通过前向链路124向终端设备122发送信息，并通过反向链路126从终端设备122接收信息。
例如，在频分双工(FDD，Frequency Division Duplex)***中，例如，前向链路118可利用与反向链路120所使用的不同频带，前向链路124可利用与反向链路126所使用的不同频带。
再例如，在时分双工(TDD，Time Division Duplex)***和全双工(Full Duplex)***中，前向链路118和反向链路120可使用共同频带，前向链路124和反向链路126可使用共同频带。
被设计用于通信的每组天线和/或区域称为网络设备102的扇区。例如，可将天线组设计为与网络设备102覆盖区域的扇区中的终端设备通信。在网络设备102通过前向链路118和124分别与终端设备116和122进行通信的过程中，网络设备102的发射天线可利用波束成形来改善前向链路118和124的信噪比。此外，与网络设备通过单个天线向它所有的终端设备发送信号的方式相比，在网络设备102利用波束成形向相关覆盖区域中随机分散的终端设备116和122发送信号时，相邻小区中的移动设备会受到较少的干扰。
在给定时间，网络设备102、终端设备116或终端设备122可以是无线通信发送装置和/或无线通信接收装置。当发送数据时，无线通信发送装置可对数据进行编码以用于传输。具体地，无线通信发送装置可获取要通过信道发送至无线通信接收装置的一定数目的数据比特，例如，无线通信发送装置可生成、从其它通信装置接收、或在存储器中保存等要通过信道发送至无线通信接收装置的一定数目的数据比特。这种数据比特可包含 在数据的传输块或多个传输块中，传输块可被分段以产生多个码块。
在本申请实施例中，多个终端设备可以复用同一时频资源与网络设备进行传输，因此，网络设备在同一时刻可能与多个终端设备进行数据传输，由于网络设备与各终端设备传输数据的过程类似，为了便于理解和说明，以下，以网络设备与多个终端设备中的某一终端设备传输数据的流程为例进行说明。
图2是根据本申请实施例的信号传输方法200的示意性流程图。该方法可以应用于5G通信***中，具体地可以应用于5G通信***中的大规模MTC通信场景中的M2M通信业务，包括但不限于智能抄表，智能电网，安全监控，森林防护，智能交通和电子医疗等。该方法200可以由通信设备执行，该通信设备可以为终端设备或基站。但是本申请实施例主要以终端设备来执行该方法200为例进行说明。
在201中，通信设备从自身的待发送比特流中获取比特组，可选地，该比特组包括至少两个比特。
在202中，基于码本，所述通信设备对所述比特组进行调制，得到至少两个调制符号。
在203中，所述通信设备将至少两个所述调制符号中的每个所述调制符号映射到帧中对应的时隙。
在204中，所述通信设备发送映射后的至少两个所述调制符号。
其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由所述待发送比特流的多个比特组得到的调制符号。
具体地，在201中，通信设备可以从待发送比特流中取单位个比特组，以进行调制处理，每个比特组可以包括至少两个比特，比特组中比特的具体数量与后续进行调制所采用的码本相关。
在本申请实施例中提到的比特组的概念只是为了描述的方便，代表调制处理的最小单元，在进行调制处理时可以没有分组的动作，只是每次进行调制处理所需的比特称作为比特组，每个比特组可以包括至少一个比特，每个比特组可以作为一个整体进行调制获取至少两个调制符号。
在从待发送比特流中获取比特组进行调制之前，还可以做以下处理：对传输块(Transport Block，TB)添加循环冗余校验码(Cyclic Redundancy Check，CRC)，对传输块进行分块得到多个子块以及对每个子块添加CRC校验，信道编码，速率比配，以及码块级联。
具体地，如图3所示，假设用户设备的待发送信息比特序列为a0,a1,…,aA-1，长度为A。在301中，对该待发送信息比特添加CRC校验，得到序列b0,b1,…,bB-1。在302中，如果A>B，按照长度B对添加CRC校验后的待发送信息比特进行分块，分为K块，以及对每一个子块再次添加CRC校验，获得序列
Figure PCTCN2017070653-appb-000001
在303中，接下来把各个字块送入信道编码器，如Turbo编码器进行信道编码，编码输出为
Figure PCTCN2017070653-appb-000002
在304中，按照给定的码率进行速率匹配，输出为
Figure PCTCN2017070653-appb-000003
在305中，将速率匹配结果进行码快级联得到序列f0,f1,…,fG-1，也即在201中所提到的待发送比特流。
在本申请实施例中，终端设备可以确定码本用于对数据进行调制处理，其中，终端 设备可以从码本集中确定码本，也可以从配置信息中确定预先指定的码本。
本申请实施例提到的码本是码本集中的码本，该码本集可以有多种规格，例如6x4码本，12x8或者24x8码本等。若选择6x4的码本集，则意味着在当前***帧中有6种码本供发送端选择进行数据调制，且存在4个等长的数据传输时隙(slot)；若选择12x8的码本集，则意味着在当前***帧12种码本供发送端选择进行数据调制，且存在8个等长的数据传输时隙(slot)。其中单个时隙(slot)的长度远大于单个数据调制符号持续的时间长度，因此，单个时隙可以具有多个连续的调制符号映射位置。终端设备进行调制处理所采用的码本可以是终端设备从码本集中选择的码本，也可以是预配置在终端设备中的码本。
本申请实施例提到的所述码本由多个码字组成，所述码字为多维复数向量，所述码字包括至少一个零符号和至少一个非零符号。
本申请实施例提到的码本可以称为稀疏码分多址(SCMA，Sparse Code Multiple Access)码本，当然，本申请实施例中的码本也可以有别的名称。
具体来讲，SCMA是一种新的多址接入方式。在该接入方式中，多个用户复用同一个时频资源块进行数据传输。以基于单载波的SCMA***为例，假设一个SCMA码本长度为L，即映射一组S比特大小的数据块需要L个调制符号。将一个子帧分为L份时隙，每个时隙可容纳M个调制符号，所以一个子帧中可以映射M*L个调制符号。当终端设备#k发送数据时，首先将待发送数据分成S比特大小的数据块，通过查找#k用户的码本，然后将这些S比特大小的数据块映射为对应的调制符号X#k＝{X#k1,X#k2,…,X#KL}。然后，将第一组S比特大小的数据块映射的调制符号依次映射到L个时隙的第一个位置，将第二组S比特大小的数据块映射的调制符号依次映射到L个时隙的第二个位置，直到将第M组S比特大小的数据块映射的调制符号依次映射到L个时隙的第M个位置。发射符号时，第1个时隙内的符号是所有S比特大小的数据块映射的调制符号的第1个符号，第二个时隙内的符号是所有S比特大小的数据映射的调制符号的第二个符号，依次类推，第L个时隙内的符号是所有S比特大小的数据映射的调制符号的第L个符号。
在本申请实施例中，将同一比特组调制得到的不同的调制符号映射到不同的时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由待发送比特流的多个比特组得到的调制符号，可以使得发送的符号在时间上连续，避免发送端将同一比特组调制得到的不同调制符号映射到相同时隙，以及在时域上在映射完一个比特组得到的调制符号再映射另一个比特组得到的调制符号而带来的射频频繁ON/OFF(开/关)的问题，可以避免发送端功耗过大，尤其适用于巨量小包传输的通信场景。
可选地，在本申请实施例中，每个所述调制符号在所述多个的连续调制符号映射位置中的排序，与对应的比特组在所述待发送比特流中的排序一致。例如，比特组在比特流的位置为按先后顺序的第n个位置，则该比特组产生的调制符号所占的位置也是在所对应的时隙中的调制符号的第n个位置。由此可以使得接收端直接按照符号的位置就可以得到原始数据，实现简单解码。
可选地，本申请实施例中，帧的时隙数量与码本所属的码本集对应的时隙数量相同；帧的时隙数量大于调制得到的所述至少两个调制符号所映射的时隙数量；以及帧的时隙数量与终端数量的比值，小于调制得到的至少两个调制符号所映射的时隙数量，其中，终端数量是指使用相同码本集中的码本的终端的数量。
其中，码本所属的码本集对应的时隙数量是指码本集中所***本可能映射的时隙数 量的总和，调制得到的至少两个调制符号所映射的时隙数量为每个码本所映射的时隙数量。例如，6x4码本集对应的时隙数量为4，每个码本所映射的时隙数量为2。
可选地，在本申请实施例中，帧的时隙长度等分。当然，帧的时隙长度也可以不等分。
本申请中的码本表明比特组和调制符号的对应关系和调制符号和时隙的对应关系。在以下描述中，有时为了描述的方便而非限定，将比特组和调制符号的对应关系称为比特-符号映射关系，以及将调制符号和时隙的对应关系称为符号-时隙映射关系。
可选地，在本申请实施例中，通信设备可以根据码本指示比特-符号映射关系，对该比特组进行调制，得到至少两个调制符号；以及通信设备可以根据符号-时隙映射关系，将至少两个该调制符号中的每个该调制符号映射到帧中对应的时隙。
以下以规格为6x4码本集为例进行说明该比特-符号映射关系和符号-时隙映射关系。
在6x4的码本集中，共有6个不同码本，使用该码本集中的码本调制时，每两个原始比特在经过码本映射后，产生两个调制符号(S1(xx),S2(xx))，由于两个原始比特共四种(00,01,10,11)可能的组合，则会产生四种可能组合的调制符号。比特-符号的映射关系可以如下表一所示：
表一
比特 符号1 符号2
00 S1(00) S2(00)
01 S1(01) S2(01)
10 S1(10) S2(10)
11 S1(11) S2(11)
本申请的码本还可以进一步指示符号-时隙映射关系，用于表示映射得到的符号所应对应的时隙。
规格为6x4的码本集中的6个码本所对应的时隙索引可以如表二所示：
表二
码本索引 时隙索引a,b}
1 {1,3}
2 {2,3}
3 {1,4}
4 {1,2}
5 {2,4}
6 {3,4}
其中，表二表明了不同的码本可以对应的不同的时隙，也即是说不同码本的调制符号映射到对应的时隙，则意味着码本可以指示符号-时隙映射关系，即表明调制符号和时 隙的对应关系。
对于包含比特
Figure PCTCN2017070653-appb-000004
的块，按照表一所示的码本进行调制，得到包含复数域符号
Figure PCTCN2017070653-appb-000005
的块，其中，将
Figure PCTCN2017070653-appb-000006
为映射到第一分配的时隙的符号，
Figure PCTCN2017070653-appb-000007
为映射到第二分配的时隙的符号。复数域符号
Figure PCTCN2017070653-appb-000008
应该以d(q)(0)为开始按序映射到每个时隙不用于导频传输的物理资源块中。其中，两个分配的时隙对应于按照表二所示的可用资源时隙，其中，在表2中，a是第一分配的时隙的时隙索引，b是第二分配的时隙的索引，具体映射方式可见图4。
在图4中示出了，6x4码本集中每个码本所对应的映射位置。其中，图中灰色块代表使用该码本进行编码后所产生的调制符号在单个***帧中所放置的时隙(slot)编号。以码本1为例，其中第一个灰色块代表S1(xx)需要放置在***帧内的第一个时隙上，第二个灰色块代表S2(xx)需要放置在***帧内的第三个时隙上。再以码本2为例，其中第二个灰色块代表S1(xx)需要放置在***帧内的第二个时隙上，第二个灰色块代表S2(xx)需要放置在***帧内的第三个时隙上。其他码本所对应的时隙见图，此处不再阐述。
以下结合图5以假设终端设备选择图3中的码本1，来具体说明终端设备是如何对发送比特流进行调制处理。
终端设备从待传输的比特流中选取连续的两个比特，例如，图4中第一个比特组“01”。选取的该两个比特通过所选定的码本映射后，生成一组两个调制符号：S1(01)，S2(01)；终端设备将所产生的S1(01)按照比特流的选取顺序，放置在所选定码本所指示的***帧中的1号时隙的第一个符号位置上，S2(01)则放置在***帧中的3号时隙的第一个符号位置上。终端设备继续选取连续的两个比特，例如，图中第二个比特组“11”，选取的该两个比特通过所选定的码本映射后，生成一组两个调制符号：S1(11)，S2(11)。所产生的调制符号S1(11)，S2(11)同样按照所选定码本所指示的1号时隙与3号时隙上，并按顺序分别排列在S1(01)，S2(01)之后。终端设备继续选取连续两个比，例如，图4中第三个比特组“10”。选取的该两个比特通过所选定的码本映射后，生成一组两个调制符号：S1(10)，S2(10)。所产生的调制符号S1(10)，S2(10)同样按照所选定码本所指示的1号时隙与3号时隙上，并按顺序分别排列在S1(11)，S2(11)之后。对于比特流中的后续比特的处理过程，与上述描述的数据调制与资源映射过程相同。
多个终端设备中的每个在进行了如图5所示的处理过程之后，可以实现时域资源的复用。例如，如图6所示，多个终端设备UE1，UE2，UE3，UE4….UEn选择码本集中的码本进行调制处理和资源映射处理之后，可以通过相同的数据帧进行输出传输，调制之后可以进行根升余弦脉冲成型处理，数字上变频处理和射频处理等。
本申请实施例可以采用单载波发送映射后的调制符号，也即采用单个载波而非多载波来发送映射后的调制符号。通过单载波发送映射后的调制符号可以使得接收端具有单载波***结构简单，覆盖广，发送端时域信号低PAPR的优势。
本申请实施例可以从多个子载波中选择子载波作为单载波，该多个子载波组成连续频谱。该多个单载波可以具有相同的载波宽度，或存在两个以上的子载波具有不同的载波宽度。
图7示出了具有相同的载波宽度的时隙和子载波的资源划分图。其中，不同子载波上使用独立的码本集，即码本集1，码本集2，码本集3，码本集N，这些码本集可以相同，也可以不同。不同子载波上根据所使用的码本集的规格的不同，将单个***帧划分为不同数量的多个等长的时隙。单个***帧内，一个终端设备可以只占用一个子载波发送数据，并且选用该子载波上对应的码本集中的码本使用如图1和图2所示的方法对数据进行处理。
图8示出了具有不同的载波宽度的时隙和子载波的资源划分图。其中，不同子载波上使用独立的码本集，即码本集1，码本集2，码本集3，码本集N，这些码本集可以相同，也可以不同。不同子载波上根据所使用的码本集的规格的不同，将单个***帧划分为不同数量的多个等长的时隙。单个***帧内，一个终端设备只占用一个子载波发送数据，并且选用该子载波上对应的码本集中的码本使用如图1和图2所示的方法对数据进行处理。
其中，终端设备可以根据自身所需传输速率和/或离接收端的距离来选择子载波。例如，当终端离基站的距离愈远时，选择较窄的载波宽度，因为这个时候相同的能量分布在更窄的频谱上，可以传送的更远。当离基站的距离越近的时候，传送距离并没有那么高的要求，这个时候终端可以适当选择更宽的载波宽度，将能量散布在更宽的频带上，用于和基站进行更高速率的通信速率。
可选地，在本申请实施例中，通信设备也可以从传输数据将要采用的时域资源来确定所使用的码本集。例如，在某四个时隙中，采用一个6x4的码本集，在下四个时隙中，采用另一个6x4的码本集。通信设备也可以从传输数据所采用的子载波和时域资源来通过确定所使用的码本集。例如，选择的子载波指示采用的码本集的规格是6x4，但是可以根据所采用的时域资源，来具体确定采用哪个6x4的码本集。
应理解，以上描述了某一终端设备如何根据码本获取调制符号，并将调制符号映射到相应的资源并发送给网络设备。在本申请实施例中，例如，如图9所示，可以有多个终端设备，即终端设备#1，终端设备#2，终端设备#3和终端设备#4，从某一码本集中选择码本，获取调制符号，并将调制符号映射到相应的资源并发送给网络设备，其中，每个终端设备具体执行的操作可以参考上文的描述。具体地，在801-1中，终端设备#1基于比特组和码本，获取至少两个调制符号，在802-1中，终端设备#1将同一比特组得到的不同的调制符号映射到不同的时隙，并发送给终端设备。在801-2中，终端设备#2基于比特组和码本，获取至少两个调制符号。在802-2中，终端设备#2将同一比特组得到的不同的调制符号映射到不同的时隙，并发送给终端设备。在801-3中，终端设备#3基于比特组和码本，获取至少两个调制符号。在802-3中，终端设备#3将同一比特组得到的不同的调制符号映射到不同的时隙，并发送给终端设备。应理解，虽然上述各个步骤在图上显示是上下排列，但是仅仅是为了布图的方便，不同终端设备可以采用相同的时域资源发送调制符号，多个终端设备通过相同的时域资源发送的调制符号组成了复用符号。在803中，网络设备接收到该复用符号后，可以从该复用符号中获取各个终端设备的调制符号。具体如何获取，可以参考关于图10的描述。
图10是根据本申请实施例的信号传输方法300的示意性流程图。该方法可以应用于5G通信***中，具体地可以应用于5G通信***中的大规模MTC通信场景中的M2M通信业务，包括但不限于智能抄表，智能电网，安全监控，森林防护，智能交通和电子医疗等。该方法可以由通信设备执行，例如网络设备，具体为基站。以下主要以网络设备为例进行说明，但是本申请并不限于此。
在301中，通信设备在帧中每个时隙接收复用符号，复用符号复用有多个发送端的调制符号。
设备根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个发送端的至少两个调制符号。
在303中，根据所述码本，所述通信设备对从至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组。
在304中，根据所述比特组，所述通信设备获取发送端数据。
具体地说，网络设备可以检测当前子帧的发送数据对应的导频，然后根据导频和码本之间的对应关系，确定可能采用的所***本。然后，网络设备可以根据符号-时隙映射关系，分别从码本映射的至少两个时隙中的每个时隙的对应位置取出接收符号，构成数据块，每个数据块均是发射端多个用户的SCMA调制码字经过信道叠加后的接收信号，接收机以这样的数据块为基本译码单元。然后，可以根据码本的比特-符号映射关系，对调制符号进行SCMA译码，以得到相应的比特组。
SCMA译码采用一种称为消息传递算法(Message Passing Algorithm，MPA)的译码算法。MPA的译码方式可以看做是一种消息传递的过程，这里的“消息”指的是对发射端SCMA编码器所用调制符号的一种猜测。每个用户和SCMA译码基本单元的所采用的时隙资源之间通过SCMA的调制符号建立关系，然后在用户和时隙资源之间迭代传递每个调制符号的“猜测”，在迭代过程中这些“猜测”的可靠度发生变化，直到达到***最大迭代次数。在迭代过程中，消息传递算法增大这些“猜测”的可信度，实现可靠译码。
在本申请实施例中，所述帧的每个时隙包括多个连续的调制符号接收位置。基站在所述每个时隙依次获取调制符号，每次所述至少两个时隙对应位置获取的调制符号用于共同解调获取比特组。
以上已结合图1至图10描述了根据本申请实施例的信号传输方法，以下将结合图11至14描述根据本申请实施例的信号传输装置。
图11是根据本申请实施例的通信设备400的示意性框图，如图11所示，该通信设备400包括获取单元410、调制单元420、映射单元430和发送单元440。
具体地，获取单元410，用于从待发送比特流中获取比特组，可选地，所述比特组包括至少两个比特。调制单元420，用于基于码本，所述通信设备对所述比特组进行调制，得到至少两个调制符号。映射单元430，用于将至少两个所述调制符号中的每个所述调制符号映射到帧中对应的时隙。发送单元440，用于发送映射后的至少两个所述调制符号，其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由所述待发送比特流的多个比特组得到的调制符号。
可选地，所述码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
可选地，每个所述调制符号在所述多个的连续调制符号映射位置中的排序，与对应的比特组在所述待发送比特流中的排序一致。
可选地，所述帧的时隙数量与所述码本所属的码本集对应的时隙数量相同。可选地，所述帧的时隙长度等分，或者帧的时隙长度可以不等分。
可选地，所述发送单元430具体用于：通过单载波发送映射后的至少两个所述调制符号。
可选地，如图11所示，所述装置400还包括：选择单元450，用于从多个子载波中选择子载波作为所述单载波，以发送映射后的至少两个所述调制符号，其中，多个所述子载波组成连续频谱。可以从选择的子载波对应的码本集中确定所使用的码本。
可选地，该装置400为终端设备。
可选地，如图11所示，获取单元410、调制单元420和映射单元430属于处理器，即这些单元由处理器来实现。可选地，如图11所述，可选的选择单元450也属于处理器。
应理解，根据本申请实施例的通信设备400可对应于执行本申请实施例中的方法200中的通信设备，并且通信设备400中的各个单元的上述操作和/或功能可以用于执行上述方法实施例中与终端设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图12是根据本申请实施例的信号传输装置500的示意性框图，如图12所示，该装置500包括接收单元510和获取单元520。
具体地，接收单元510，在帧中每个时隙接收复用符号，所述复用符号复用有多个发送端的调制符号。获取单元520，用于根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号；根据所述码本，对从所述至少两个时隙的得到所述至少两个调制符号进行解调，得到比特组；根据所述比特组，获取发送端数据。
可选地，所述帧的时隙数量与所述码本所属的码本集对应的时隙数量相同。可选地，所述帧的时隙长度等分，或者帧的时隙长度可以不等分。
可选地，所述码本表明比特组和调制符号的对应关系和调制符号和时隙的对应关系。
可选地，每个时隙包括多个连续的符号映射位置，所述第二获取单元520具体用于：
在每个所述时隙的多个连续的符号映射位置依次获取接收符号，每次至少两个所述时隙对应位置获取的接收符号用于共同解调获取比特组。
可选地，该通信设备500为网络设备，例如，基站。
可选地，获取单元510可以属于处理器，即由处理器来实现该单元。
应理解，根据本申请实施例的通信设备500可对应于执行本申请实施例中的方法300中的通信设备，并且通信设备500中的各个单元的上述操作和/或功能可以用于执行上述方法实施例中与终端设备对应的各个流程和/或步骤，为避免重复，在此不再赘述。
图13是根据本申请实施例的信号传输装置600的示意性框图，该装置600包括处理器610、存储器620和收发器630。存储器620，用于存放程序指令。处理器610可以调用存储器620中存放的程序指令，可以执行图2所示实施例中的一个或多个步骤，或其中可选的实施方式。
具体地，处理器610从待发送比特流中获取比特组，所述比特组包括至少两个比特；基于码本，所述通信设备对所述比特组进行调制，得到至少两个调制符号；将至少两个 所述调制符号中的每个所述调制符号映射到帧中对应的时隙；通过所述收发器630发送映射后的至少两个所述调制符号；其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由所述待发送比特流的多个比特组得到的调制符号。
可选地，处理器610通信通过单载波利用收发器630发送映射后的至少两个所述调制符号。
可选地，处理器610从多个子载波中选择子载波作为所述单载波，以发送映射后的至少两个所述调制符号，其中，多个所述子载波组成连续频谱。可以从选择的子载波对应的码本集中确定码本。
可选地，如图13所示，通信设备600还可以包括总线***640，处理器610、存储器620和收发器630通过总线***640相连。该通信设备600可选地为终端设备。
该存储器可以包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器也可以包括非易失性存储器(non-volatile memory)，例如快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器还可以包括上述种类的存储器的组合。
图14是根据本申请实施例的信号传输装置600的示意性框图，该装置700包括处理器710、存储器720和收发器730。存储器720，用于存放程序指令。处理器710可以调用存储器720中存放的程序指令，可以执行图9所示实施例中的一个或多个步骤，或其中可选的实施方式。
该装置700可选地为网络设备，例如，基站。
具体地，处理器710通过收发器730在帧中每个时隙接收复用符号，所述复用符号复用有多个发送端的调制符号；根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号；根据所述码本，对从所述至少两个时隙的得到所述至少两个调制符号进行解调，得到比特组；根据所述比特组，获取发送端数据。
可选地，如图14所示，通信设备700还可以包括总线***740，处理器710、存储器720和收发器730通过总线***740相连。处理器710、存储器720和收发器730也可以通过其他方式相连，例如：直接连接。该通信设备700可选地为终端设备。
在本申请实施例中，处理器610或710可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。处理器610还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，缩写：CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic,GAL)或其任意组合。
该总线***640或740除包括数据总线之外，还可以包括电源总线、控制总线和状态信号总线等。为便于表示，图中仅用一条粗线表示总线***640或740，但并不表示仅有一根总线或一种类型的总线。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究 竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的***、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的***、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个***，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备，可以是个人计算机，服务器，或者网络设备等，执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应所述以权利要求的保护范围为准。

Claims (24)

  1. 一种信号传输方法，其特征在于，包括：
    通信设备从待发送比特流中获取比特组；
    基于码本，所述通信设备对所述比特组进行调制，得到至少两个调制符号；
    所述通信设备将至少两个所述调制符号中的每个所述调制符号映射到帧中对应的时隙；
    所述通信设备发送映射后的至少两个所述调制符号；
    其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由所述待发送比特流的多个比特组得到的调制符号。
  2. 根据权利要求1所述的方法，其特征在于，所述码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
  3. 如权利要求1或2所述的方法，其特征在于，所述帧包含的时隙的数量为所述码本所属的码本集对应的时隙数量。
  4. 根据权利要求1至3中任一项所述的方法，其特征在于，所述通信设备发送映射后的至少两个所述调制符号，包括：
    所述通信设备通过单载波发送映射后的至少两个所述调制符号。
  5. 根据权利要求4所述的方法，其特征在于，在所述通信设备对所述比特组进行调制，得到至少两个调制符号之前，所述方法还包括：
    从多个子载波中选择子载波作为所述单载波，以发送映射后的至少两个所述调制符号，其中，所述多个子载波组成连续频谱；
    从所述单载波对应的码本集中确定所述码本。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，每个所述调制符号在所述多个的连续调制符号映射位置中的排序，与对应的比特组在所述待发送比特流中的排序一致。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述码本包括多个码字，所述码字为多维复数向量，所述码字包括至少一个零符号和至少一个非零符号。
  8. 一种信号传输方法，其特征在于，包括：
    通信设备在帧中每个时隙接收复用符号，所述复用符号复用有多个发送端的调制符号；
    所述通信设备根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号；
    根据所述码本，所述通信设备对从所述至少两个时隙得到的所述至少两个调制符号进行解调，得到比特组；
    根据所述比特组，所述通信设备获取发送端数据。
  9. 根据权利要求8所述的方法，其特征在于，所述码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
  10. 根据权利要求8或9所述的方法，其特征在于，所述帧包含的时隙的数量为所述码本所属的码本集对应的时隙数量。
  11. 根据权利要求8至10中任一项所述的方法，其特征在于，每个时隙包括多个连续的符号映射位置，用于映射由多个比特组得到的调制符号，所述从每个所述发送端对 应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号，包括：
    在每个所述时隙的多个连续的符号映射位置依次获取调制符号，每次至少两个所述时隙对应位置获取的调制符号用于共同解调获取比特组。
  12. 根据权利要求8至11中任一项所述的方法，其特征在于，所述码本由多个码字组成，所述码字为多维复数向量，所述码字包括至少一个零符号和至少一个非零符号。
  13. 一种通信设备，其特征在于，包括处理器、存储器和收发器；其中，所述存储器用于存储指令，所述处理器用于调用所述指令执行以下处理：
    从待发送比特流中获取比特组；
    基于码本，所述通信设备对所述比特组进行调制，得到至少两个调制符号；
    将至少两个所述调制符号中的每个所述调制符号映射到帧中对应的时隙；
    指示所述收发器发送映射后的至少两个所述调制符号；
    其中，同一比特组得到的不同调制符号映射到不同时隙，每个时隙包括多个连续的调制符号映射位置，用于映射由所述待发送比特流的多个比特组得到的调制符号。
  14. 根据权利要求13所述的通信设备，其特征在于，所述码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
  15. 如权利要求13或14所述的通信设备，其特征在于，所述帧包含的时隙的数量为所述码本所属的码本集对应的时隙数量。
  16. 根据权利要求13至14中任一项所述的通信设备，其特征在于，所述处理器用于调用所述指令具体执行以下处理：
    指示所述收发器通过单载波发送映射后的至少两个所述调制符号。
  17. 根据权利要求16所述的通信设备，其特征在于，所述处理器用于调用所述指令具体执行以下处理：
    从多个子载波中选择子载波作为所述单载波，以发送映射后的至少两个所述调制符号，其中，所述多个子载波组成连续频谱；
    从所述单载波对应的码本集中确定所述码本。
  18. 根据权利要求13至17中任一项所述的通信设备，其特征在于，每个所述调制符号在所述多个的连续调制符号映射位置中的排序，与对应的比特组在所述待发送比特流中的排序一致。
  19. 根据权利要求13至18中任一项所述的通信设备，其特征在于，所述码本包括多个码字，所述码字为多维复数向量，所述码字包括至少一个零符号和至少一个非零符号。
  20. 一种通信设备，其特征在于，包括处理器、存储器和收发器；其中，所述存储器用于存储指令，所述处理器用于调用所述指令执行以下处理：
    指示所述收发器在帧中每个时隙接收复用符号，所述复用符号复用有多个发送端的调制符号；
    根据码本，从每个所述发送端对应的至少两个时隙的复用符号中获取每个所述发送端的至少两个调制符号；
    根据所述码本，对从所述至少两个时隙的得到所述至少两个调制符号进行解调，得到比特组；
    根据所述比特组，获取发送端数据。
  21. 根据权利要求20所述的通信设备，其特征在于，所述码本表明比特组和调制符号的对应关系以及调制符号和时隙的对应关系。
  22. 根据权利要求20或21所述的通信设备，其特征在于，所述帧包含的时隙的数量为所述码本所属的码本集对应的时隙数量。
  23. 根据权利要求20至22中任一项所述的通信设备，其特征在于，每个时隙包括多个连续的符号映射位置，所述处理器用于调用所述指令具体执行以下处理：
    在每个所述时隙的多个连续的符号映射位置依次获取调制符号，每次至少两个所述时隙对应位置获取的调制符号用于共同解调获取比特组。
  24. 根据权利要求20至23中任一项所述的通信设备，其特征在于，所述码本由多个码字组成，所述码字为多维复数向量，所述码字包括至少一个零符号和至少一个非零符号。
PCT/CN2017/070653 2016-02-04 2017-01-09 信号传输方法和装置 WO2017133407A1 (zh)

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