WO2020147693A1 - 一种非正交多址接入noma多层传输方法及其装置 - Google Patents

一种非正交多址接入noma多层传输方法及其装置 Download PDF

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WO2020147693A1
WO2020147693A1 PCT/CN2020/071833 CN2020071833W WO2020147693A1 WO 2020147693 A1 WO2020147693 A1 WO 2020147693A1 CN 2020071833 W CN2020071833 W CN 2020071833W WO 2020147693 A1 WO2020147693 A1 WO 2020147693A1
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spreading sequence
spreading
sequence group
terminal
noma
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PCT/CN2020/071833
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English (en)
French (fr)
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林祥利
赵铮
任斌
邢艳萍
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电信科学技术研究院有限公司
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Priority to EP20741911.0A priority Critical patent/EP3913815A4/en
Priority to KR1020217024839A priority patent/KR102564339B1/ko
Priority to US17/423,910 priority patent/US11923891B2/en
Priority to JP2021541497A priority patent/JP7223149B2/ja
Publication of WO2020147693A1 publication Critical patent/WO2020147693A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • 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
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0077—Multicode, e.g. multiple codes assigned to one user
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes
    • 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
    • H04L5/0026—Division using four or more dimensions
    • 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
    • H04L5/0037—Inter-user or inter-terminal allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition

Definitions

  • This application relates to the field of wireless communication technology, and in particular to a non-orthogonal multiple access NOMA multilayer transmission method and device.
  • 5G NR 5 Generation New RAT
  • 5G NR 5 Generation New RAT
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • CDMA Code Division Multiple Access
  • PDMA Patten Division Multiple Access
  • the same user can use multiple layers for transmission, and the transmission data of multiple layers are transmitted on the same time, frequency, and space resources, and are distinguished by coding domain, power domain, and phase.
  • Non-orthogonal Multiple Access For non-orthogonal multiple access (Non-orthogonal Multiple Access, NOMA) multi-layer transmission, if the spreading sequence used between the multi-layer transmission of the same User Equipment (UE, also called terminal) is not completely correct Crossing, it will have an impact on performance, especially in the case of high bit rate.
  • UE User Equipment
  • the embodiments of the present application provide a NOMA multilayer transmission method and device.
  • a NOMA multilayer transmission method including:
  • the terminal determines a spreading sequence group for NOMA multilayer transmission, and the terminal is configured for NOMA multilayer transmission; wherein, the spreading sequence group includes N spreading sequences, and the N spreading sequences correspond to N data layers, the N spreading sequences are orthogonal to each other, N is the number of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1;
  • the terminal sends data, and the data includes N data layers spread using the spreading sequence group.
  • the terminal determining a spreading sequence group for NOMA multilayer transmission includes: the terminal determines to be used for NOMA multilayer transmission according to the configuration information of the spreading sequence group sent by the network device The spreading sequence group; wherein the configuration information of the spreading sequence group is used to indicate the spreading sequence group configured for the terminal.
  • the terminal determining a spreading sequence group for NOMA multilayer transmission includes: the terminal selects a spreading sequence group for NOMA multilayer transmission from a spreading sequence pool; where The spreading sequence pool includes M spreading sequence groups, and the spreading sequences in each spreading sequence group are orthogonal to each other, and M is an integer greater than 1.
  • the method further includes: the terminal sending configuration information of the selected spreading sequence group to the network device.
  • the spreading sequence pool is pre-configured or agreed by the system.
  • the spreading sequence pool includes 48 spreading sequence groups, each spreading sequence group includes 2 mutually orthogonal spreading sequences, and each spreading sequence includes 4 Vector elements.
  • the spreading sequence pool is shown in the following table:
  • a NOMA multilayer transmission method includes:
  • the network device determines a spreading sequence group used by the terminal for NOMA multilayer transmission, and the terminal is configured for NOMA multilayer transmission; wherein, the spreading sequence group includes N spreading sequences, and the N spreading sequences Corresponding to N data layers, the N spreading sequences are orthogonal to each other, N is the number of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1;
  • the network device receives data sent by the terminal, and the data includes N data layers spread using the spreading sequence group.
  • the network device determining the spreading sequence group used by the terminal for NOMA multilayer transmission includes: the network device selects the terminal from the spreading sequence pool for NOMA multilayer transmission The spreading sequence group; wherein, the spreading sequence pool includes M spreading sequence groups, and the spreading sequences in each spreading sequence group are orthogonal to each other, and M is an integer greater than 1.
  • the method further includes: the network device sends the configuration information of the spreading sequence group selected for the terminal to the terminal.
  • the network device determining the spreading sequence group used by the terminal for NOMA multilayer transmission includes: the network device receives the configuration information of the spreading sequence group sent by the terminal, and according to all The configuration information of the spreading sequence group determines the spreading sequence group used by the terminal for NOMA multi-layer transmission; wherein the spreading sequence group is selected by the terminal from the spreading sequence pool; wherein, The spreading sequence pool includes M spreading sequence groups, and the spreading sequences in each spreading sequence group are orthogonal to each other, and M is an integer greater than 1.
  • the spreading sequence pool is pre-configured or agreed by the system.
  • the spreading sequence pool includes 48 spreading sequence groups, each spreading sequence group includes 2 mutually orthogonal spreading sequences, and each spreading sequence includes 4 Vector elements.
  • the spreading sequence pool is shown in the following table:
  • a terminal including:
  • the determining module is configured to determine a spreading sequence group for NOMA multilayer transmission, and the terminal is configured for NOMA multilayer transmission; wherein, the spreading sequence group includes N spreading sequences, and the N spreading sequences The frequency sequence corresponds to N data layers, the N spreading sequences are orthogonal to each other, N is the number of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1;
  • the sending module is configured to send data, and the data includes N data layers spread using the spreading sequence group.
  • a network device including:
  • the determining module is configured to determine a spreading sequence group used by the terminal for NOMA multilayer transmission, and the terminal is configured for NOMA multilayer transmission; wherein, the spreading sequence group includes N spreading sequences, and the N The spreading sequence corresponds to N data layers, the N spreading sequences are orthogonal to each other, N is the number of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1;
  • the receiving module is configured to receive data sent by the terminal, where the data includes N data layers spread using the spreading sequence group.
  • a communication device including: a processor, a memory, and a transceiver; the processor is configured to read computer instructions in the memory, and execute any one of the above-mentioned first aspects. method.
  • a communication device including: a processor, a memory, and a transceiver; the processor is configured to read computer instructions in the memory, and execute any one of the above-mentioned second aspect method.
  • a computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause the computer to execute any of the above-mentioned first aspects. The method described.
  • a computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to cause the computer to execute any of the above-mentioned second aspects. The method described.
  • the terminal determines a spreading sequence group for NOMA multi-layer transmission.
  • the spreading sequence group includes N spreading sequences, and the N spreading sequences correspond to N data layers.
  • the N spreading sequences are orthogonal to each other, so that when the terminal uses the spreading sequence in the spreading sequence group to spread the N data layers, it can ensure that the spreading data layers are orthogonal to each other. , Which can improve the data transmission performance of the terminal.
  • FIG. 1 is a block diagram of the sending end of NOMA multilayer transmission provided by an embodiment of the application
  • Fig. 2 is a PDMA pattern matrix for 6-user single-layer transmission provided by an embodiment of the application
  • FIG. 3 is a PDMA pattern matrix of 6-user double-layer transmission provided by an embodiment of the application.
  • FIG. 4 is a schematic diagram of a NOMA multi-layer transmission process on the terminal side according to an embodiment of the application;
  • FIG. 5 is a schematic diagram of a NOMA multilayer transmission process on the network device side according to an embodiment of the application
  • FIG. 6 is a schematic structural diagram of a terminal provided by an embodiment of the application.
  • FIG. 7 is a schematic structural diagram of a network device provided by an embodiment of this application.
  • FIG. 8 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 9 is a schematic structural diagram of a communication device provided by an embodiment of the application.
  • the sender uses multiple access (MA) signatures for processing to assist the receiver's detection.
  • the MA signature may be a codeword, a codebook, a spreading sequence, an interleaving pattern, a mapping pattern, a preamble, and the like. Furthermore, it is further divided into NOMA single-layer transmission and NOMA multi-layer transmission according to whether the number of adopted MA signatures is one or more.
  • Figure 1 shows a block diagram of the sender of NOMA multi-layer transmission, where the sender performs channel coding and rate matching on the source bits of UE1 and then demultiplexes them into L layer.
  • the sub-data streams of L are subjected to modulation (Modulation), spreading (Spreading), power/phase weighting factor (Scaling factor) and resource element (Resourse Element, RE) mapping (RE Mapping) respectively, and then all L layer
  • modulation Modulation
  • Spreading spreading
  • power/phase weighting factor scaling factor
  • resource element Resource element
  • RE Mapping Resource element mapping
  • OFDM Orthogonal Frequency Division Multiplexing
  • OFDM Orthogonal Frequency Division Multiplexing
  • the PDMA pattern defines the data-to-resource mapping rules, and specifically defines how many resources the data is mapped to, which resources are mapped to, and how to map.
  • the data of multiple UEs are mapped to the same set of resources through different PDMA patterns, and the number of UEs that support simultaneous transmission is greater than the number of resources, thereby realizing non-orthogonal transmission and achieving the purpose of improving system performance.
  • the PDMA pattern can be defined by a binary vector, the length of the vector element is equal to the spreading factor, and the value of the vector element represents the weighting coefficient value of the UE data mapped to the RE.
  • the mapping weighting coefficient can be 0 or 1 or -1, or a complex number i or a complex number -i.
  • the PDMA patterns of all UEs that reuse the same group of resources are arranged together to form a PDMA pattern matrix.
  • the PDMA pattern matrix is usually a sparse matrix.
  • the matrix shown in FIG. 2 represents a PDMA pattern matrix with 6 multiplexed UEs and a spreading sequence length of 4, in which each UE is a single layer transmission.
  • the data symbol sent by user 2 is s
  • the data symbol sent on resources 1 to 4 is [s, s, -s, -s] T.
  • Figure 3 shows a six-user double-layer PDMA pattern matrix, in which each UE uses two layers for transmission, and each UE occupies two spreading sequences. Based on Figure 3, it can be seen that the spreading sequences used by the two layers in some UEs are not completely orthogonal, which will affect the transmission performance of the UE, especially when the bit rate is high. The performance impact is getting worse. At present, there is no clear solution to the problem that the spreading sequence codebook used in NOMA's multi-layer transmission is not completely orthogonal.
  • the embodiment of the present application provides a NOMA multi-layer transmission scheme, which can ensure that spreading sequences used by multiple layers of a UE are orthogonal to each other, thereby ensuring the data transmission performance of the UE.
  • sum means summation
  • overline means conjugate
  • FIG. 4 is a schematic flowchart of a NOMA multi-layer transmission method implemented on the terminal side according to an embodiment of this application, and the procedure can be implemented on the terminal side.
  • the terminal is a device that provides users with voice and/or data connectivity, and may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, drones, or connected to wireless Other processing equipment of the modem, as well as various forms of user equipment (User Equipment, UE), mobile station (Mobile Station, MS), terminal (Terminal Equipment), transmission point (Transmission and Receiver Point, TRP or Transmission Point, TP) and many more.
  • UE User Equipment
  • MS Mobile Station
  • terminal Terminal
  • Transmission Point Transmission and Receiver Point
  • TRP Transmission and Transmission Point
  • the process can include the following steps:
  • the terminal determines a spreading sequence group for NOMA multilayer transmission, and the terminal is configured for NOMA multilayer transmission; wherein the spreading sequence group includes N spreading sequences, and the N spreading sequences Corresponding to N data layers, that is, there is a one-to-one correspondence between N spreading sequences and N data layers, and one data layer uses one spreading sequence for spreading.
  • the N spreading sequences are orthogonal to each other, N is the number of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1.
  • the value of the vector element in the spreading sequence is a weighting coefficient, and the length of the vector element in the spreading sequence is equal to the spreading factor.
  • the weighting coefficient is one of 0, 1, -1, i, and -i.
  • the spreading sequence group determined by the terminal for two-layer transmission includes spreading sequence 1 and spreading Sequence 2, spreading sequence 1 is used for layer 1 spreading, and spreading sequence 2 is used for layer 2 spreading.
  • Spreading sequence 1 and spreading sequence 2 can be respectively represented as a vector containing 4 vector elements, where:
  • the spreading sequence 1 is: [1,i,-1,-i] T.
  • the spreading sequence 2 is: [1, -i, -1, i] T.
  • Spreading sequence 1 and spreading sequence 2 satisfy the condition described in equation (1), and therefore are orthogonal to each other.
  • Each weighting coefficient in the spreading sequence 1 corresponds to an RE to which the layer 1 data of the terminal is mapped
  • each weighting coefficient in the spreading sequence 2 corresponds to an RE to which the layer 2 data of the terminal is mapped.
  • S402 The terminal sends data, where the data includes N data layers spread using the spreading sequence group.
  • the terminal performs channel coding and rate matching on the source bits to be sent, and then demultiplexes them into L layer (L is an integer greater than 1).
  • L is an integer greater than 1.
  • the stream is subjected to Modulation, Spreading, Scaling Factor processing, and RE Mapping respectively, and then all L-layer signals are added together to generate OFDM symbols and send.
  • each layer uses a spreading sequence in the spreading sequence group, and different layers use different spreading sequences. Since the spreading sequences in the spreading sequence group are orthogonal to each other, the data after spreading in different layers of the same terminal is orthogonal to each other, thereby improving the data transmission performance of the terminal.
  • the terminal determines a spreading sequence group for NOMA multi-layer transmission.
  • the spreading sequence group includes N spreading sequences.
  • the N spreading sequences correspond to N data layers.
  • the two spreading sequences are orthogonal to each other. In this way, when the terminal uses the spreading sequence in the spreading sequence group to spread the N data layers, it can ensure that the spreading data layers are orthogonal to each other. In turn, the data transmission performance of the terminal can be improved.
  • the spreading sequence group used for NOMA multilayer transmission is pre-configured by the network device.
  • the terminal determines a spreading sequence group for NOMA multi-layer transmission according to the configuration information of the spreading sequence group sent by the network device.
  • the configuration information of the spreading sequence group is used to indicate the spreading sequence group configured for the terminal.
  • the network device may select a spreading sequence group for the terminal from the spreading sequence pool, and send configuration information of the selected spreading sequence group to the terminal.
  • the configuration information of the spreading sequence group may include: a group identifier of a spreading sequence group configured for the terminal, and the group identifier is used to uniquely identify a spreading sequence group.
  • the configuration information of the spreading sequence group may also include: an identifier of each spreading sequence in the spreading sequence group, where the identifier of one spreading sequence is used to uniquely identify a spreading sequence.
  • the multi-layer spreading sequence is selected from a spreading sequence pool.
  • the terminal selects a spreading sequence group for NOMA multi-layer transmission from the spreading sequence pool.
  • the method further includes: the terminal sends configuration information of the selected spreading sequence group to the network device, so that the network device despreads the data sent by the terminal according to the spreading sequence group.
  • the configuration information of the spreading sequence group may include: a group identifier of the spreading sequence group selected by the terminal, and the group identifier is used to uniquely identify a spreading sequence group.
  • the configuration information of the spreading sequence group may also include: an identifier of each spreading sequence in the spreading sequence group, where the identifier of one spreading sequence is used to uniquely identify one spreading sequence.
  • FIG. 5 is a schematic flowchart of the NOMA multilayer transmission method implemented on the network device side according to an embodiment of this application, and the process can be implemented on the network device side.
  • the network device is a device that connects the terminal to the wireless network, including but not limited to: evolved Node B (evolved Node B, eNB), Radio Network Controller (RNC), Node B (Node B, NB), base station controller (Base Station Controller, BSC), base transceiver station (Base Transceiver Station, BTS), home base station (for example, Home evolved Node B, or Home Node B, HNB), baseband unit ( Base Band Unit, BBU), Wireless Fidelity (Wireless Fidelity, WIFI) Access Point (AP), Transmission Point (Transmission and Receiver Point, TRP or Transmission Point, TP), Node B (gNB) that continues to evolve Wait.
  • evolved Node B evolved Node B
  • RNC Radio Network Controller
  • Node B Node B
  • BSC Base Station Controller
  • BTS base transceiver station
  • BTS home base station
  • base station for example, Home evolved Node B, or Home Node B, HNB
  • baseband unit Base Band Unit,
  • the process can include the following steps:
  • the network device determines a spreading sequence group used by the terminal for NOMA multilayer transmission, and the terminal is configured for NOMA multilayer transmission; wherein, the spreading sequence group includes N spreading sequences, and the N spreading sequences are The frequency sequence corresponds to N data layers, that is, there is a one-to-one correspondence between N spreading sequences and N data layers. One data layer uses one spreading sequence for spreading. Between the N spreading sequences Orthogonal to each other, N is the number of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1.
  • the value of the vector element in the spreading sequence is a weighting coefficient, and the length of the vector element in the spreading sequence is equal to the spreading factor.
  • the weighting coefficient is one of 0, 1, -1, i, and -i.
  • the spreading sequence group determined by the terminal for two-layer transmission includes spreading sequence 1 and spreading Sequence 2, spreading sequence 1 is used for layer 1 spreading, and spreading sequence 2 is used for layer 2 spreading.
  • Spreading sequence 1 and spreading sequence 2 can be respectively represented as a vector containing 4 vector elements, where:
  • the spreading sequence 1 is: [1,i,-1,-i] T.
  • the spreading sequence 2 is: [1, -i, -1, i] T.
  • Spreading sequence 1 and spreading sequence 2 satisfy the condition described in equation (1), and therefore are orthogonal to each other.
  • Each weighting coefficient in the spreading sequence 1 corresponds to an RE to which the layer 1 data of the terminal is mapped
  • each weighting coefficient in the spreading sequence 2 corresponds to an RE to which the layer 2 data of the terminal is mapped.
  • S502 The network device receives data sent by the terminal, where the data includes N data layers spread using the spreading sequence group.
  • the network device splits the received OFDM symbols into L layers, and performs de-RE mapping, de-spreading, demodulation, and decoding on the sub-data stream of the l-th layer (1 ⁇ l ⁇ L) to obtain The source bit of the l-th sub-data stream.
  • one spreading sequence in the spreading sequence group is used for despreading for each layer, and the spreading sequences used by different layers are different. Since the spreading sequences in the spreading sequence group are orthogonal to each other, the data after spreading in different layers of the same terminal is orthogonal to each other, thereby improving the data transmission performance of the terminal.
  • the spreading sequence group used for NOMA multilayer transmission is pre-configured by the network device.
  • the network device selects a spreading sequence group for NOMA multi-layer transmission for the terminal from the spreading sequence pool; wherein, the spreading sequence pool includes M spreading sequences Group, the spreading sequences in each spreading sequence group are orthogonal to each other, and M is an integer greater than 1.
  • the network device may select a spreading sequence group for the terminal from the spreading sequence pool, and send configuration information of the selected spreading sequence group to the terminal.
  • the configuration information of the spreading sequence group may include: a group identifier of a spreading sequence group configured for the terminal, and the group identifier is used to uniquely identify a spreading sequence group.
  • the configuration information of the spreading sequence group may also include: an identifier of each spreading sequence in the spreading sequence group, where the identifier of one spreading sequence is used to uniquely identify one spreading sequence.
  • the multi-layer spreading sequence is selected by the terminal from the spreading sequence pool.
  • the network device receives the configuration information of the spreading sequence group sent by the terminal, and according to the configuration information of the spreading sequence group, the network device determines that the terminal is used for NOMA The spreading sequence group of layer transmission.
  • the spreading sequence group is selected by the terminal from a spreading sequence pool; wherein, the spreading sequence pool includes M spreading sequence groups, one of the spreading sequences in each spreading sequence group They are orthogonal to each other, and M is an integer greater than 1.
  • the configuration information of the spreading sequence group may include: a group identifier of the spreading sequence group, and the group identifier is used to uniquely identify a spreading sequence group.
  • the configuration information of the spreading sequence group may also include: an identifier of each spreading sequence in the spreading sequence group, where the identifier of one spreading sequence is used to uniquely identify one spreading sequence.
  • the spreading sequence pool is pre-configured or agreed by the system.
  • the spreading sequence pool includes M spreading sequence groups, and the spreading sequences in each spreading sequence group are orthogonal to each other.
  • M is an integer greater than 1.
  • the value of a vector element (ie, weighting coefficient) in a spreading sequence can be one of 0, 1, -1, i, -i, when a terminal supports at most two layers of transmission, it can satisfy The number of mutually orthogonal spreading sequence groups is large.
  • Each of these spreading sequence groups can be used for simulation tests, and a partial spreading sequence group with better transmission performance can be selected from them, or a spreading sequence group that meets a preset condition can be selected to form a spreading sequence pool.
  • the number of spreading sequence groups contained in the spreading sequence pool is greater than or equal to the maximum number of user multiplexing supported by the system.
  • the spreading sequence pool includes 48 spreading sequence groups, and each spreading sequence group includes 2 Mutually orthogonal spreading sequences, each spreading sequence includes 4 vector elements.
  • Table 1 exemplarily shows the spreading sequence pool.
  • the spreading sequence group 1 includes two spreading sequences, which are respectively expressed as: [1,i,-1,-i] T and [1,-i,-1,i] T.
  • the spreading sequences included in the other spreading sequence groups are shown in the table, and will not be described one by one.
  • UE1 selects the spreading sequence group numbered 1
  • UE2 selects the spreading sequence group numbered 3
  • UE3 selects the spreading sequence group numbered 4
  • UE4 selects the spreading sequence group numbered 39, then these 4 UEs
  • Table 2 The double-layer spreading sequence matrix used is shown in Table 2:
  • Table 2 The 4-user double-layer spreading sequence matrix of Example 1
  • the spreading sequence used by the sub-data stream corresponding to layer 1 of UE1 is [1,i,-1,-i] T
  • the spreading sequence used by the sub-data stream corresponding to layer 2 of UE1 is [1, -i, -1, i] T.
  • the spreading sequence groups used by other UEs are shown in Table 2, which will not be detailed here.
  • UEs configured for NOMA transmission in the network, namely UE1, UE2, UE3, UE4, UE5, and UE6.
  • these 6 UEs select a spreading sequence group from the spreading sequence pool described in Table 1.
  • UE1 selects a spreading sequence group numbered 34
  • UE2 selects a spreading sequence group numbered 1
  • UE3 selects a spreading sequence group numbered 16
  • UE4 selects a spreading sequence group numbered 25
  • UE5 selects a spreading sequence group numbered
  • UE6 selects the spreading sequence group numbered 33
  • Table 3 the double-layer spreading sequence matrix used by these 6 UEs is shown in Table 3:
  • Table 3 6-user double-layer spreading sequence matrix of example 2
  • the spreading sequence used by the sub-data stream corresponding to layer 1 of UE1 is [1,i,-i,0] T
  • the spreading sequence used by the sub-data stream corresponding to layer 2 of UE1 is [1, 0 ,I,-i] T.
  • the spreading sequence groups used by other UEs are shown in Table 3, which will not be detailed here.
  • UEs configured for NOMA transmission in the current network, namely UE1, UE2, UE3, UE4, UE5, UE6, UE7, and UE8.
  • these 8 UEs select a spreading sequence group from the spreading sequence pool shown in Table 1.
  • UE1 selects the spreading sequence group numbered 2
  • UE2 selects the spreading sequence group numbered 7
  • UE3 selects the spreading sequence group numbered 8
  • UE4 selects the spreading sequence group numbered 11
  • UE5 selects the numbered spreading sequence group
  • UE6 selects the spreading sequence group numbered 31
  • UE7 selects the spreading sequence group numbered 36
  • UE8 selects the spreading sequence group numbered 46, then the two layers used by these 8 UEs
  • Table 4 The spreading sequence matrix is shown in Table 4:
  • Table 4 8-user double-layer spreading sequence matrix of example 3.
  • the spreading sequence used by the sub-data stream corresponding to layer 1 of UE1 is [1,-1,1,-1] T
  • the spreading sequence used by the sub-data stream corresponding to layer 2 of UE1 is [1, -1, -1, 1] T.
  • the spreading sequence groups used by other UEs are shown in Table 4, which will not be detailed here.
  • UEs configured for NOMA transmission in the network, namely UE1, UE2, UE3, UE4, UE5, UE6, UE7, UE8, UE9, and UE10.
  • these 10 UEs select a spreading sequence group from the spreading sequence pool shown in Table 1.
  • UE1 selects a spreading sequence group numbered 39
  • UE2 selects a spreading sequence group numbered 1
  • UE3 selects a spreading sequence group numbered 2
  • UE4 selects a spreading sequence group numbered 3
  • UE5 selects a spreading sequence group numbered
  • the spreading sequence group of 4 UE6 selects the spreading sequence group numbered 23
  • UE7 selects the spreading sequence group numbered 24
  • UE8 selects the spreading sequence group numbered 25
  • UE9 selects the spreading sequence group numbered 29
  • UE10 selects the spreading sequence group numbered 36
  • Table 5 the double-layer spreading sequence matrix used by these 10 UEs is shown in Table 5:
  • Table 5 10-user double-layer spreading sequence matrix of example 4.
  • the spreading sequence used by the sub-data stream corresponding to layer 1 of UE1 is [1,-1,1,1] T
  • the spreading sequence used by the sub-data stream corresponding to layer 2 of UE1 is [1,1 , -1, 1] T.
  • the spreading sequence groups used by other UEs are shown in Table 5, which will not be detailed here.
  • UEs configured for NOMA transmission in the network, namely UE1, UE2, UE3, UE4, UE5, UE6, UE7, UE8, UE9, UE10, UE11, and UE12.
  • the 12 UEs select a spreading sequence group from the spreading sequence pool shown in Table 1.
  • UE1 selects the spreading sequence group numbered 1
  • UE2 selects the spreading sequence group numbered 2
  • UE3 selects the spreading sequence group numbered 3
  • UE4 selects the spreading sequence group numbered 4
  • UE5 selects the numbered spreading sequence group
  • the spreading sequence group of 23 UE6 selects the spreading sequence group numbered 24
  • UE7 selects the spreading sequence group numbered 25
  • UE8 selects the spreading sequence group numbered 29
  • UE9 selects the spreading sequence group numbered 36
  • UE10 selects the spreading sequence group numbered 39
  • UE11 selects the spreading sequence group numbered 44
  • UE12 selects the spreading sequence group numbered 48.
  • Table 6 The double-layer spreading sequence matrix used by these 12 UEs is shown in Table 6. -1 and Table 6-2:
  • Table 6-1 12-user double-layer spreading sequence matrix of example 5
  • Table 6-2 12-user double-layer spreading sequence matrix of example 5
  • the spreading sequence used by the sub-data stream corresponding to layer 1 of UE1 is [1,i,-1,-i] T
  • the spreading sequence used by the sub-data stream corresponding to the layer 2 of UE1 is [1, -i, -1, i] T.
  • the spreading sequence groups used by other UEs are shown in Table 6, which will not be detailed here.
  • an embodiment of the present application also provides a terminal.
  • the terminal can implement the terminal side functions in the foregoing embodiments.
  • the terminal 600 may include: a determining module 601 and a sending module 602.
  • the determining module 601 is configured to determine a spreading sequence group for NOMA multilayer transmission, the terminal is configured for NOMA multilayer transmission; wherein, the spreading sequence group includes N spreading sequences, and the N The spreading sequence corresponds to N data layers, the N spreading sequences are orthogonal to each other, N is the number of data layers for the NOMA multi-layer transmission, and N is an integer greater than 1;
  • the sending module 602 is configured to send data, and the data includes N data layers spread using the spreading sequence group.
  • the determining module 601 may be specifically configured to: determine a spreading sequence group for NOMA multi-layer transmission according to the configuration information of the spreading sequence group sent by the network device; wherein, the configuration information of the spreading sequence group is Yu indicates the spreading sequence group configured for the terminal.
  • the determining module 601 may be specifically configured to: select a spreading sequence group for NOMA multi-layer transmission from a spreading sequence pool; wherein the spreading sequence pool includes M spreading sequence groups, each The spreading sequences in the spreading sequence group are orthogonal to each other, and M is an integer greater than 1.
  • the determining module 601 is further configured to send the configuration information of the selected spreading sequence group to the network device through the sending module 602.
  • the spreading sequence pool is pre-configured or agreed by the system.
  • the spreading sequence pool includes 48 spreading sequence groups, each spreading sequence group includes 2 mutually orthogonal spreading sequences, and each spreading sequence includes 4 vector elements.
  • An example of the spreading sequence pool can be as shown in Table 1 above.
  • the embodiment of the present application also provides a network device.
  • the network device can implement the functions of the network device side in the foregoing embodiment.
  • the network device may be a base station.
  • the network device 700 may include a determining module 701, a receiving module 702, and further may include a sending module (not shown in the figure).
  • the determining module 701 is configured to determine a spreading sequence group used by a terminal for NOMA multilayer transmission, and the terminal is configured for NOMA multilayer transmission; wherein, the spreading sequence group includes N spreading sequences, and the N N spreading sequences correspond to N data layers, the N spreading sequences are orthogonal to each other, N is the number of data layers of the NOMA multi-layer transmission, and N is an integer greater than 1;
  • the receiving module 702 is configured to receive data sent by the terminal, where the data includes N data layers spread using the spreading sequence group.
  • the determining module 701 is specifically configured to: select a spreading sequence group for NOMA multi-layer transmission for the terminal from a spreading sequence pool; wherein, the spreading sequence pool includes M spreading sequence groups , The spreading sequences in each spreading sequence group are orthogonal to each other, and M is an integer greater than 1.
  • the determining module 701 is further configured to send the configuration information of the spreading sequence group selected for the terminal to the terminal through the sending module.
  • the determining module 701 is specifically configured to: receive the configuration information of the spreading sequence group sent by the terminal through the receiving module 702, and determine that the terminal is used for NOMA multilayer transmission according to the configuration information of the spreading sequence group The spreading sequence group; wherein the spreading sequence group is selected by the terminal from the spreading sequence pool, and the spreading sequence pool includes M spreading sequence groups, each of which is The spreading sequences are orthogonal to each other, and M is an integer greater than 1.
  • the spreading sequence pool is pre-configured or agreed by the system.
  • the spreading sequence pool includes 48 spreading sequence groups, each spreading sequence group includes 2 mutually orthogonal spreading sequences, and each spreading sequence includes 4 vector elements.
  • An example of the spreading sequence pool can be as shown in Table 1 above.
  • an embodiment of the present application also provides a communication device.
  • the communication device may be a terminal and can implement the functions implemented on the terminal side in the embodiments of the present application.
  • the communication device may include: a processor 801, a memory 802, a transceiver 803, and a bus interface 804.
  • the processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 can store data used by the processor 801 when performing operations.
  • the transceiver 803 is used to receive and send data under the control of the processor 801.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 801 and various circuits of the memory represented by the memory 802 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the processor 801 is responsible for managing the bus architecture and general processing, and the memory 802 can store data used by the processor 801 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 801 or implemented by the processor 801.
  • the steps of the signal processing flow can be completed by hardware integrated logic circuits in the processor 801 or instructions in the form of software.
  • the processor 801 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the embodiments in this application
  • the disclosed methods, steps and logic block diagrams may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.
  • the software module may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, and a register.
  • the storage medium is located in the memory 802, and the processor 801 reads the information in the memory 802 and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 801 is configured to read computer instructions in the memory 802 and execute functions implemented on the terminal side in the flow shown in FIG. 4.
  • an embodiment of the present application also provides a communication device, which may be a network device, such as a base station, which can implement the functions implemented on the network device side in the embodiment of the present application.
  • a communication device which may be a network device, such as a base station, which can implement the functions implemented on the network device side in the embodiment of the present application.
  • the communication device may include: a processor 901, a memory 902, a transceiver 903, and a bus interface 904.
  • the processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 can store data used by the processor 901 when performing operations.
  • the transceiver 903 is used to receive and send data under the control of the processor 901.
  • the bus architecture may include any number of interconnected buses and bridges. Specifically, one or more processors represented by the processor 901 and various circuits of the memory represented by the memory 902 are linked together.
  • the bus architecture can also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, etc., which are well known in the art, and therefore, they will not be further described in this article.
  • the bus interface provides an interface.
  • the processor 901 is responsible for managing the bus architecture and general processing, and the memory 902 can store data used by the processor 901 when performing operations.
  • the process disclosed in the embodiment of the present application may be applied to the processor 901 or implemented by the processor 901.
  • each step of the signal processing flow can be completed by an integrated logic circuit of hardware in the processor 901 or instructions in the form of software.
  • the processor 901 may be a general-purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, and can implement or execute the embodiments of the present application The disclosed methods, steps and logic block diagrams.
  • the general-purpose processor may be a microprocessor or any conventional processor.
  • the steps of the method disclosed in conjunction with the embodiments of the present application may be directly embodied and executed by a hardware processor, or may be executed and completed by a combination of hardware and software modules in the processor.
  • the software module may be located in a mature storage medium in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an electrically erasable programmable memory, and a register.
  • the storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with its hardware.
  • the processor 901 is configured to read computer instructions in the memory 902 and execute functions implemented on the network device side in the process shown in FIG. 5.
  • embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to make the computer execute the process executed by the terminal in FIG. 4.
  • embodiments of the present application also provide a computer-readable storage medium.
  • the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to make the computer execute the process executed by the network device in FIG. 5.
  • These computer program instructions may also be stored in a computer readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, the instructions
  • the device implements the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operating steps are performed on the computer or other programmable device to generate computer-implemented processing, which is executed on the computer or other programmable device
  • the instructions provide steps for implementing the functions specified in one block or multiple blocks of the flowchart one flow or multiple flows and/or block diagrams.

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Abstract

本申请公开了一种非正交多址接入NOMA多层传输方法及其装置。本申请中，终端确定用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；所述终端发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。当终端使用所述扩频序列组中的扩频序列对N个数据层进行扩频后，可以保证扩频后的数据层之间相互正交，进而可以提高终端的数据传输性能。

Description

一种非正交多址接入NOMA多层传输方法及其装置
相关申请的交叉引用
本申请要求在2019年01月18日提交中国专利局、申请号为201910048770.6、申请名称为“一种NOMA多层传输方法及其装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及无线通信技术领域，尤其涉及一种非正交多址接入NOMA多层传输方法及其装置。
背景技术
随着移动通信业务需求的发展变化，国际电信联盟(International Telecommunication Union，ITU)等多个组织对未来移动通信系统都开始研究新的无线通信系统(即5G NR，5Generation New RAT)。与传统的时分多址接入(Time Division Multiple Access，TDMA)、频分多址接入(Frequency Division Multiple Access，FDMA)、码分多址接入(Code Division Multiple Access，CDMA)技术类似，图样分割多址接入(Patten Division Multiple Access，PDMA)技术作为未来5G的关键技术，可以使多用户在相同的时域、频域、空域资源上进行数据传输，并通过编码域和功率域进行区分，达到提高小区频谱效率和边缘用户频谱效率，以及提升小区接入用户数的目的。类似的，同一个用户可以使用多层进行传输，多个层的传输数据在相同的时域、频域、空域资源上传输，并通过编码域、功率域和相位等进行区分。
对于非正交多址接入(Non-orthogonal Multiple Access，NOMA)多层传输，如果同一个用户设备(User Equipment，UE，也称终端)的多层传输之间使用的扩频序列没有完全正交，则会对性能产生影响，尤其是在码率较高的情况下。
目前，对于NOMA多层传输使用的扩频序列没有完全正交的问题尚未有解决方案。
发明内容
本申请实施例提供一种NOMA多层传输方法及其装置。
第一方面，提供一种NOMA多层传输方法，该方法包括：
终端确定用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N大于1的整数；
所述终端发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
在一种可能的实现方式中，所述终端确定用于NOMA多层传输的扩频序列组，包括：所述终端根据网络设备发送的扩频序列组的配置信息，确定用于NOMA多层传输的扩频序列组；其中，所述扩频序列组的配置信息用于指示为所述终端配置的扩频序列组。
在一种可能的实现方式中，所述终端确定用于NOMA多层传输的扩频序列组，包括：所述终端从扩频序列池中选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
可选地，所述方法还包括：所述终端将所选择的扩频序列组的配置信息发送给网络设备。
在一种可能的实现方式中，所述扩频序列池是预先配置的，或系统约定的。
在一种可能的实现方式中，所述扩频序列池中包括48个扩频序列组，每个扩频序列组中包括2个相互正交的扩频序列，每个扩频序列中包括4个向量元素。
在一种可能的实现方式中，所述扩频序列池如以下表格所示：
Figure PCTCN2020071833-appb-000001
Figure PCTCN2020071833-appb-000002
第二方面，提供一种NOMA多层传输方法，该方法包括：
网络设备确定终端用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N大于1的整数；
所述网络设备接收所述终端发送的数据，所述数据包括使用所述扩频序 列组扩频的N个数据层。
在一种可能的实现方式中，所述网络设备确定终端用于NOMA多层传输的扩频序列组，包括：所述网络设备从扩频序列池中为所述终端选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
在一种可能的实现方式中，所述方法还包括：所述网络设备将为所述终端所选择的扩频序列组的配置信息发送给所述终端。
在一种可能的实现方式中，所述网络设备确定终端用于NOMA多层传输的扩频序列组，包括：所述网络设备接收所述终端发送的扩频序列组的配置信息，并根据所述扩频序列组的配置信息网络设备确定所述终端用于NOMA多层传输的扩频序列组；其中，所述扩频序列组是所述终端从扩频序列池中选择的；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
在一种可能的实现方式中，所述扩频序列池是预先配置的，或系统约定的。
在一种可能的实现方式中，所述扩频序列池中包括48个扩频序列组，每个扩频序列组中包括2个相互正交的扩频序列，每个扩频序列中包括4个向量元素。
在一种可能的实现方式中，所述扩频序列池如以下表格所示：
Figure PCTCN2020071833-appb-000003
Figure PCTCN2020071833-appb-000004
Figure PCTCN2020071833-appb-000005
第三方面，提供一种终端，包括：
确定模块，用于确定用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N大于1的整数；
发送模块，用于发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
第四方面，提供一种网络设备，包括：
确定模块，用于确定终端用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N大于1的整数；
接收模块，用于接收所述终端发送的数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
第五方面，提供一种通信装置，包括：处理器、存储器、收发机；所述处理器，用于读取所述存储器中的计算机指令，执行如上述第一方面中任一项所述的方法。
第六方面，提供一种通信装置，包括：处理器、存储器、收发机；所述处理器，用于读取所述存储器中的计算机指令，执行如上述第二方面中任一项所述的方法。
第七方面，提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行如上述第一方面中任一项所述的方法。
第八方面，提供一种计算机可读存储介质，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行如上述第二方面中任一项所述的方法。
本申请的上述实施例中，终端确定用于NOMA多层传输的扩频序列组，扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，这样，当终端使用所述扩频序列组中的扩频序列对N个数据层进行扩频后，可以保证扩频后的数据层之间相互正交，进而可以提高终端的数据传输性能。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简要介绍，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，对于本领域的普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的NOMA多层传输的发送端框图；
图2为本申请实施例提供的6用户单层传输的PDMA图样矩阵；
图3为本申请实施例提供的6用户双层传输的PDMA图样矩阵；
图4为本申请实施例提供的终端侧的NOMA多层传输流程示意图；
图5为本申请实施例提供的网络设备侧的NOMA多层传输流程示意图；
图6为本申请实施例提供的终端的结构示意图；
图7为本申请实施例提供的网络设备的结构示意图；
图8为本申请实施例提供的通信装置的结构示意图；
图9为本申请实施例提供的通信装置的结构示意图。
具体实施方式
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
(1)本申请实施例中，名词“网络”和“系统”经常交替使用，但本领域的技术人员可以理解其含义。
(2)本申请实施例中术语“多个”是指两个或两个以上，其它量词与之类似。
(3)“和/或”描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
在NOMA技术中，为了区分在相同时频资源上的不同UE的信号，发送端使用多址接入(MA)签名进行处理，以辅助接收端的检测。所述MA签名可以是码字、码本、扩频序列、交织图样、映射图样和前导码等。进一步地，根据采用的MA签名个数是一个还是多个进一步划分为NOMA单层传输和NOMA多层传输。
图1示出了NOMA多层传输的发送端框图，其中，发送端对UE1的信源比特进行信道编码、速率匹配之后进行解复用，分为L层，对于第l层(1≤l≤L)的子数据流分别进行调制(Modulation)、扩频(Spreading)、功率/相位加权因子(Scaling Factor)处理和资源单元(Resourse Element，RE)映射(RE Mapping)，然后将所有L层的信号相加，再生成频分正交复用(Orthogonal Frequency Division Multiplexing，OFDM)符号。其中，同一个UE的不同层 之间的调制、扩频序列和功率/相位加权因子不完全相同。
其中，扩频是根据PDMA图样矩阵进行处理的。PDMA图样定义了数据到资源的映射规则，具体定义了数据映射到多少个资源，映射到哪些资源以及如何映射。多个UE的数据通过不同的PDMA图样映射到相同的一组资源上，支持同时传输的UE数量大于资源数量，从而实现非正交传输，达到提升系统性能的目的。
PDMA图样可以通过一个二进制向量定义，向量元素的长度等于扩频因子，向量元素的取值表示UE的数据映射到RE的加权系数值。映射加权系数可为0或者1或者-1，或者复数i或者复数-i。
复用同一组资源的所有UE的PDMA图样排列在一起构成PDMA图样矩阵。PDMA图样矩阵通常为稀疏矩阵。图2所示的矩阵表示复用UE数量为6，且扩频序列长度为4的PDMA图样矩阵，其中每个UE为单层传输。基于图2，用户2发送数据符号为s，则经过PDMA图样矩阵处理后，在资源1～4上发送的数据符号为[s，s，-s，-s] T。
对于NOMA多层传输，一个UE占用两个或两个以上的扩频序列，用于每一层的扩频。图3示出了一种6用户双层的PDMA图样矩阵，其中每个UE采用两层进行传输，每个UE占用两个扩频序列。基于图3可以看出，有的UE内的两层所使用的扩频序列并没有完全正交，因此会对该UE的传输性能产生影响，尤其是在码率较高的情况下，对传输性能的影响愈加严重。目前对于NOMA的多层传输使用的扩频序列码本没有完全正交的问题还没有明确的解决方案。
本申请实施例提供一种NOMA多层传输方案，可以保证一个UE的多个层所使用的扩频序列相互正交，从而保证该UE的数据传输性能。
其中，序列正交的定义为：设有2个序列(seq1和seq2)，分别表示为seq1＝{q1,q2,q3,…qn}和seq2＝{s1,s2,s3,…,sn}，当满足如下条件时，则seq1与seq2完全正交：
Figure PCTCN2020071833-appb-000006
式(1)中，sum表示求和，上划线表示共轭。
下面结合附图对本申请实施例进行详细描述。
参见图4，为本申请实施例提供的终端侧实现的NOMA多层传输方法的流程示意图，该流程可在终端侧实现。
其中，所述终端是一种向用户提供语音和/或数据连通性的设备，可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备、无人机或连接到无线调制解调器的其它处理设备，以及各种形式的用户设备(User Equipment，UE)，移动台(Mobile Station，MS)，终端(Terminal Equipment)，传输点(Transmission and Receiver Point，TRP或者Transmission Point，TP)等等。
如图4所示，该流程可包括以下步骤：
S401：终端确定用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，即N个扩频序列和N个数据层之间为一一对应的关系，一个数据层使用一个扩频序列进行扩频。所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数。
所述扩频序列中的向量元素的取值为加权系数，所述扩频序列中的向量元素的长度等于扩频因子。
其中，所述加权系数为0、1、-1、i、-i中的一个。
举例来说，如果该终端被配置为采用两层传输，且每层被映射到4个RE，则该终端确定出的用于两层传输的扩频序列组中包括扩频序列1和扩频序列2，扩频序列1用于层1的扩频，扩频序列2用于层2的扩频。扩频序列1和扩频序列2可分别被表示为一个包含4个向量元素的向量，其中：
扩频序列1为：[1，i，-1，-i] T。
扩频序列2为：[1，-i，-1，i] T。
扩频序列1和扩频序列2满足式(1)所描述的条件，因此相互正交。扩频序列1中的每个加权系数对应于该终端的层1数据被映射到的一个RE，扩 频序列2中的每个加权系数对应于该终端的层2数据被映射到的一个RE。
S402：终端发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
具体实施时，终端对待发送的信源比特进行信道编码、速率匹配之后进行解复用，分为L层(L为大于1的整数)，对于第l层(1≤l≤L)的子数据流分别进行调制(Modulation)、扩频(Spreading)、功率/相位加权因子(Scaling Factor)处理和RE映射(RE Mapping)，然后将所有L层的信号相加，再生成OFDM符号并发送。
其中，在进行扩频时，每个层使用扩频序列组中的一个扩频序列，且不同的层所使用的扩频序列不同。由于扩频序列组中的扩频序列相互正交，因此使得同一终端的不同层扩频后的数据相互正交，进而可以提高该终端数据传输的性能。
本申请的上述流程中，终端确定用于NOMA多层传输的扩频序列组，扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，这样，当终端使用所述扩频序列组中的扩频序列对N个数据层进行扩频后，可以保证扩频后的数据层之间相互正交，进而可以提高终端的数据传输性能。
基于图4所示的流程，在一种可能的实现方式中，用于NOMA多层传输的扩频序列组是网络设备预配置的。
相应地，在图4的S401中，终端根据网络设备发送的扩频序列组的配置信息，确定用于NOMA多层传输的扩频序列组。其中，所述扩频序列组的配置信息用于指示为所述终端配置的扩频序列组。
可选地，网络设备可从扩频序列池中为终端选择扩频序列组，并将所选择的扩频序列组的配置信息发送给该终端。
可选地，所述扩频序列组的配置信息可包括：为所述终端配置的扩频序列组的组标识，该组标识用于唯一标识一个扩频序列组。所述扩频序列组的配置信息也可包括：扩频序列组中每个扩频序列的标识，其中一个扩频序列 的标识用于唯一标识一个扩频序列。
基于图4所示的流程，在另一种可能的实现方式中，所述多层扩频序列是从扩频序列池中选择的。相应地，在图4的S401中，所述终端从扩频序列池中选择用于NOMA多层传输的扩频序列组。
可选地，所述方法还包括：终端将所选择的扩频序列组的配置信息发送给网络设备，以便网络设备根据该扩频序列组对该终端发送的数据进行解扩频。
可选地，所述扩频序列组的配置信息可包括：终端选择的扩频序列组的组标识，该组标识用于唯一标识一个扩频序列组。所述扩频序列组的配置信息也可包括：扩频序列组中每个扩频序列的标识，其中一个扩频序列的标识用于唯一标识一个扩频序列。
参见图5，为本申请实施例提供的网络设备侧实现的NOMA多层传输方法的流程示意图，该流程可在网络设备侧实现。
其中，所述网络设备是一种将终端接入到无线网络的设备，包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(Radio Network Controller，RNC)、节点B(Node B，NB)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station，BTS)、家庭基站(例如，Home evolved Node B，或Home Node B，HNB)、基带单元(Base Band Unit，BBU)、无线保真(Wireless Fidelity，WIFI)接入点(Access Point，AP)，传输点(Transmission and Receiver Point，TRP或者Transmission Point，TP)、继续演进的节点B(gNB)等。
如图5所示，该流程可包括以下步骤：
S501：网络设备确定终端用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，即N个扩频序列和N个数据层之间为一一对应的关系，一个数据层使用一个扩频序列进行扩频，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数。
所述扩频序列中的向量元素的取值为加权系数，所述扩频序列中的向量元素的长度等于扩频因子。
其中，所述加权系数为0、1、-1、i、-i中的一个。
举例来说，如果该终端被配置为采用两层传输，且每层被映射到4个RE，则该终端确定出的用于两层传输的扩频序列组中包括扩频序列1和扩频序列2，扩频序列1用于层1的扩频，扩频序列2用于层2的扩频。扩频序列1和扩频序列2可分别被表示为一个包含4个向量元素的向量，其中：
扩频序列1为：[1，i，-1，-i] T。
扩频序列2为：[1，-i，-1，i] T。
扩频序列1和扩频序列2满足式(1)所描述的条件，因此相互正交。扩频序列1中的每个加权系数对应于该终端的层1数据被映射到的一个RE，扩频序列2中的每个加权系数对应于该终端的层2数据被映射到的一个RE。
S502：网络设备接收所述终端发送的数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
具体实施时，网络设备将接收的OFDM符号拆分为L层，对于第l层(1≤l≤L)的子数据流进行解RE映射、解扩频、解调、解码等处理，从而得到第l层子数据流的信源比特。
其中，在进行解扩频时，针对每个层使用扩频序列组中的一个扩频序列进行解扩频，且不同的层所使用的扩频序列不同。由于扩频序列组中的扩频序列相互正交，因此使得同一终端的不同层扩频后的数据相互正交，进而可以提高该终端数据传输的性能。
基于图5所示的流程，在一种可能的实现方式中，用于NOMA多层传输的扩频序列组是网络设备预配置的。相应地，在图5的S501中，所述网络设备从扩频序列池中为终端选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
可选地，网络设备可从扩频序列池中为终端选择扩频序列组，并将所选 择的扩频序列组的配置信息发送给该终端。
可选地，所述扩频序列组的配置信息可包括：为所述终端配置的扩频序列组的组标识，该组标识用于唯一标识一个扩频序列组。所述扩频序列组的配置信息也可包括：扩频序列组中每个扩频序列的标识，其中一个扩频序列的标识用于唯一标识一个扩频序列。
基于图5所示的流程，在另一种可能的实现方式中，所述多层扩频序列是终端从扩频序列池中选择的。相应地，在图5的S501中，所述网络设备接收所述终端发送的扩频序列组的配置信息，并根据所述扩频序列组的配置信息，网络设备确定所述终端用于NOMA多层传输的扩频序列组。其中，所述扩频序列组是所述终端从扩频序列池中选择的；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
可选地，所述扩频序列组的配置信息可包括：扩频序列组的组标识，该组标识用于唯一标识一个扩频序列组。所述扩频序列组的配置信息也可包括：扩频序列组中每个扩频序列的标识，其中一个扩频序列的标识用于唯一标识一个扩频序列。
本申请实施例中，所述的扩频序列池是预先配置的，或系统约定的。
其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交。M为大于1的整数。
考虑到一个扩频序列中的一个向量元素(即加权系数)的取值可以是0、1、-1、i、-i中的一个，在一个终端最多支持两层传输的情况下，能够满足相互正交的扩频序列组的数量较多。可以分别使用这些扩频序列组中的每一组进行仿真测试，从中选取传输性能较优的部分扩频序列组，或者选择满足预设条件的扩频序列组，从而形成扩频序列池。扩频序列池中包含的扩频序列组的数量大于或等于系统支持的最大用户复用数量。
举例来说，如果一个终端支持最多两层传输，每层的数据被映射到4个RE，则所述扩频序列池中包括48个扩频序列组，每个扩频序列组中包括2个 相互正交的扩频序列，每个扩频序列中包括4个向量元素。表1示例性地示出了该扩频序列池。
表1：扩频序列池
Figure PCTCN2020071833-appb-000007
Figure PCTCN2020071833-appb-000008
如表1所示，扩频序列组1中包括2个扩频序列，分别表示为：[1，i，-1，-i] T以及[1，-i，-1，i] T。其它扩频序列组中包括的扩频序列如表所示，不再一一说明。
为了更清楚地理解本申请的上述实施例，下面结合几个具体实例对本申请的实施例进行详细说明。
实例1
网络中存在有4个UE配置为NOMA传输，分别为UE1，UE2，UE3，UE4。当所有UE都配置为两层传输，这4个UE从表1所示的用于双层传输的扩频序列池中选择扩频序列组。其中，UE1选择编号为1的扩频序列组，UE2选择编号为3的扩频序列组，UE3选择编号为4的扩频序列组，UE4选择编号39的扩频序列组，则这4个UE所使用的双层扩频序列矩阵为表2所示：
表2：实例1的4用户双层扩频序列矩阵
Figure PCTCN2020071833-appb-000009
表2中，UE1的层1对应的子数据流使用的扩频序列为[1，i，-1，-i] T，UE1的层2对应的子数据流使用的扩频序列为[1，-i，-1，i] T。其它UE使用的扩频序列组如表2所示，在此不再详述。
实例2
网络中存在有6个UE配置为NOMA传输，分别为UE1，UE2，UE3，UE4，UE5，UE6。当所有UE都配置为两层传输，这6个UE从表1所述的扩频序列池中选择扩频序列组。其中，UE1选择编号为34的扩频序列组，UE2选择编号为1的扩频序列组，UE3选择编号为16的扩频序列组，UE4选择编号为25的扩频序列组，UE5选择编号为26的扩频序列组，UE6选择编号为33的扩频序列组，则这6个UE所使用的双层扩频序列矩阵为表3所示：
表3：实例2的6用户双层扩频序列矩阵
Figure PCTCN2020071833-appb-000010
Figure PCTCN2020071833-appb-000011
表3中，UE1的层1对应的子数据流使用的扩频序列为[1，i，-i，0] T，UE1的层2对应的子数据流使用的扩频序列为[1，0，i，-i] T。其它UE使用的扩频序列组如表3所示，在此不再详述。
实例3
现网络中存在有8个UE配置为NOMA传输，分别为UE1，UE2，UE3，UE4，UE5，UE6，UE7，UE8。当所有UE都配置为两层传输，这8个UE从表1所示的扩频序列池中选择扩频序列组。其中，UE1选择编号为2的扩频序列组，UE2选择编号为7的扩频序列组，UE3选择编号为8的扩频序列组，UE4选择编号为11的扩频序列组，UE5选择编号为12的扩频序列组，UE6选择编号为31的扩频序列组，UE7选择编号为36的扩频序列组，UE8选择编号为46的扩频序列组，则这8个UE所使用的双层扩频序列矩阵为表4所示：
表4：实例3的8用户双层扩频序列矩阵
Figure PCTCN2020071833-appb-000012
Figure PCTCN2020071833-appb-000013
表4中，UE1的层1对应的子数据流使用的扩频序列为[1，-1，1，-1] T，UE1的层2对应的子数据流使用的扩频序列为[1，-1，-1，1] T。其它UE使用的扩频序列组如表4所示，在此不再详述。
实例4
网络中存在有10个UE配置为NOMA传输，分别为UE1，UE2，UE3，UE4，UE5，UE6，UE7，UE8，UE9，UE10。当所有UE都配置为两层传输，这10个UE从表1所示的扩频序列池中选择扩频序列组。其中，UE1选择编号为39的扩频序组，UE2选择编号为1的扩频序组，UE3选择编号为2的扩频序组，UE4选择编号为3的扩频序组，UE5选择编号为4的扩频序组，UE6选择编号为23的扩频序组，UE7选择编号为24的扩频序组，UE8选择编号为25的扩频序组，UE9选择编号为29的扩频序组，UE10选择编号为36的扩频序组，则这10个UE所使用的双层扩频序列矩阵为表5所示：
表5：实例4的10用户双层扩频序列矩阵
Figure PCTCN2020071833-appb-000014
Figure PCTCN2020071833-appb-000015
表5中，UE1的层1对应的子数据流使用的扩频序列为[1，-1，1，1] T，UE1的层2对应的子数据流使用的扩频序列为[1，1，-1，1] T。其它UE使用的扩频序列组如表5所示，在此不再详述。
实例5
网络中存在有12个UE配置为NOMA传输，分别为UE1，UE2，UE3，UE4，UE5，UE6，UE7，UE8，UE9，UE10，UE11，UE12。当所有UE都配置为两层传输，这12个UE从表1所示的扩频序列池中选择扩频序列组。其中，UE1选择编号为1的扩频序列组，UE2选择编号为2的扩频序列组，UE3选择编号为3的扩频序列组，UE4选择编号为4的扩频序列组，UE5选择编号为23的扩频序列组，UE6选择编号为24的扩频序列组，UE7选择编号为25的扩频序列组，UE8选择编号为29的扩频序列组，UE9选择编号为36的扩频序列组，UE10选择编号为39的扩频序列组，UE11选择编号为44的扩频序列组，UE12选择编号为48的扩频序列组，这12个UE所使用的双层扩频序列矩阵为表6-1和表6-2所示：
表6-1：实例5的12用户双层扩频序列矩阵
Figure PCTCN2020071833-appb-000016
表6-2：实例5的12用户双层扩频序列矩阵
Figure PCTCN2020071833-appb-000017
实例5的12用户双层扩频序列矩阵表6-1和表6-2中，UE1的层1对应的子数据流使用的扩频序列为[1，i，-1，-i] T，UE1的层2对应的子数据流使用的扩频序列为[1，-i，-1，i] T。其它UE使用的扩频序列组如表6所示，在此不再详述。
基于相同的技术构思，本申请实施例还提供了一种终端。该终端可以实现前述实施例中终端侧的功能。
参见图6，为本申请实施例提供的终端的结构示意图。如图所示，该终端600可包括：确定模块601、发送模块602。
确定模块601，用于确定用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
发送模块602，用于发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
可选地，确定模块601可具体用于：根据网络设备发送的扩频序列组的配置信息，确定用于NOMA多层传输的扩频序列组；其中，所述扩频序列组 的配置信息用于指示为所述终端配置的扩频序列组。
可选地，确定模块601可具体用于：从扩频序列池中选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
进一步地，确定模块601还用于：通过发送模块602将所选择的扩频序列组的配置信息发送给网络设备。
可选地，所述扩频序列池是预先配置的，或系统约定的。
可选地，所述扩频序列池中包括48个扩频序列组，每个扩频序列组中包括2个相互正交的扩频序列，每个扩频序列中包括4个向量元素。所述扩频序列池的一个示例可如上述表1所示。
基于相同的技术构思，本申请实施例还提供了一种网络设备。该网络设备可以实现前述实施例中网络设备侧的功能。该网络设备可以是基站。
参见图7，为本申请实施例提供的网络设备的结构示意图。该网络设备700可包括：确定模块701、接收模块702，进一步地还可包括发送模块(未在图中示出)。
确定模块701，用于确定终端用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
接收模块702，用于接收所述终端发送的数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
可选地，确定模块701具体用于：从扩频序列池中为所述终端选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
进一步地，确定模块701还用于：通过所述发送模块将为所述终端选择的扩频序列组的配置信息发送给所述终端。
可选地，确定模块701具体用于：通过接收模块702接收所述终端发送 的扩频序列组的配置信息，并根据所述扩频序列组的配置信息确定所述终端用于NOMA多层传输的扩频序列组；其中，所述扩频序列组是所述终端从扩频序列池中选择的，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
可选地，所述扩频序列池是预先配置的，或系统约定的。
可选地，所述扩频序列池中包括48个扩频序列组，每个扩频序列组中包括2个相互正交的扩频序列，每个扩频序列中包括4个向量元素。所述扩频序列池的一个示例可如上述表1所示。
基于相同的技术构思，本申请实施例还提供了一种通信装置，该通信装置可以是终端，能够实现本申请实施例中终端侧实现的功能。
参见图8，为本申请实施例提供的通信装置的结构示意图，如图所示，该通信装置可包括：处理器801、存储器802、收发机803以及总线接口804。
处理器801负责管理总线架构和通常的处理，存储器802可以存储处理器801在执行操作时所使用的数据。收发机803用于在处理器801的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器801代表的一个或多个处理器和存储器802代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器801负责管理总线架构和通常的处理，存储器802可以存储处理器801在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器801中，或者由处理器801实现。在实现过程中，信号处理流程的各步骤可以通过处理器801中的硬件的集成逻辑电路或者软件形式的指令完成。处理器801可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请实施例中公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者 任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器802，处理器801读取存储器802中的信息，结合其硬件完成信号处理流程的步骤。
具体地，处理器801，用于读取存储器802中的计算机指令并执行图4所示的流程中终端侧实现的功能。
基于相同的技术构思，本申请实施例还提供了一种通信装置，该通信装置可以是网络设备，如基站，能够实现本申请实施例中网络设备侧实现的功能。
参见图9，为本申请实施例提供的通信装置的结构示意图，如图所示，该通信装置可包括：处理器901、存储器902、收发机903以及总线接口904。
处理器901负责管理总线架构和通常的处理，存储器902可以存储处理器901在执行操作时所使用的数据。收发机903用于在处理器901的控制下接收和发送数据。
总线架构可以包括任意数量的互联的总线和桥，具体由处理器901代表的一个或多个处理器和存储器902代表的存储器的各种电路链接在一起。总线架构还可以将诸如外围设备、稳压器和功率管理电路等之类的各种其他电路链接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口提供接口。处理器901负责管理总线架构和通常的处理，存储器902可以存储处理器901在执行操作时所使用的数据。
本申请实施例揭示的流程，可以应用于处理器901中，或者由处理器901实现。在实现过程中，信号处理流程的各步骤可以通过处理器901中的硬件的集成逻辑电路或者软件形式的指令完成。处理器901可以是通用处理器、数字信号处理器、专用集成电路、现场可编程门阵列或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，可以实现或者执行本申请 实施例中公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件处理器执行完成，或者用处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器902，处理器901读取存储器902中的信息，结合其硬件完成信号处理流程的步骤。
具体地，处理器901，用于读取存储器902中的计算机指令并执行图5所示的流程中网络设备侧实现的功能。
基于相同的技术构思，本申请实施例还提供了一种计算机可读存储介质。所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行图4中终端所执行的流程。
基于相同的技术构思，本申请实施例还提供了一种计算机可读存储介质。所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行图5中网络设备所执行的流程。
本申请是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (28)

  1. 一种非正交多址接入NOMA多层传输方法，其特征在于，包括：
    终端确定用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
    所述终端发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
  2. 如权利要求1所述的方法，其特征在于，所述终端确定用于NOMA多层传输的扩频序列组，包括：
    所述终端根据网络设备发送的扩频序列组的配置信息，确定用于NOMA多层传输的扩频序列组；其中，所述扩频序列组的配置信息用于指示为所述终端配置的扩频序列组。
  3. 如权利要求1所述的方法，其特征在于，所述终端确定用于NOMA多层传输的扩频序列组，包括：
    所述终端从扩频序列池中选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
  4. 如权利要求3所述的方法，其特征在于，所述方法还包括：
    所述终端将所选择的扩频序列组的配置信息发送给网络设备。
  5. 如权利要求3所述的方法，其特征在于，所述扩频序列池是预先配置的，或系统约定的。
  6. 如权利要求3所述的方法，其特征在于，所述扩频序列池中包括48个扩频序列组，每个扩频序列组中包括2个相互正交的扩频序列，每个扩频序列中包括4个向量元素。
  7. 如权利要求6所述的方法，其特征在于，所述扩频序列池如以下表格 所示：
    Figure PCTCN2020071833-appb-100001
    Figure PCTCN2020071833-appb-100002
  8. 一种非正交多址接入NOMA多层传输方法，其特征在于，包括：
    网络设备确定终端用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
    所述网络设备接收所述终端发送的数据，所述数据包括使用所述扩频序 列组扩频的N个数据层。
  9. 如权利要求8所述的方法，其特征在于，所述网络设备确定终端用于NOMA多层传输的扩频序列组，包括：
    所述网络设备从扩频序列池中为所述终端选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
  10. 如权利要求9所述的方法，其特征在于，所述方法还包括：
    所述网络设备将为所述终端选择的扩频序列组的配置信息发送给所述终端。
  11. 如权利要求8所述的方法，其特征在于，所述网络设备确定终端用于NOMA多层传输的扩频序列组，包括：
    所述网络设备接收所述终端发送的扩频序列组的配置信息，并根据所述扩频序列组的配置信息确定所述终端用于NOMA多层传输的扩频序列组；其中，所述扩频序列组是所述终端从扩频序列池中选择的，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
  12. 如权利要求9至11中任一项所述的方法，其特征在于，所述扩频序列池是预先配置的，或系统约定的。
  13. 如权利要求9至11中任一项所述的方法，其特征在于，所述扩频序列池中包括48个扩频序列组，每个扩频序列组中包括2个相互正交的扩频序列，每个扩频序列中包括4个向量元素。
  14. 如权利要求13所述的方法，其特征在于，所述扩频序列池如以下表格所示：
    Figure PCTCN2020071833-appb-100003
    Figure PCTCN2020071833-appb-100004
    Figure PCTCN2020071833-appb-100005
  15. 一种终端，其特征在于，包括：
    确定模块，用于确定用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
    发送模块，用于发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
  16. 一种网络设备，其特征在于，包括：
    确定模块，用于确定终端用于NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所 述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
    接收模块，用于接收所述终端发送的数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
  17. 一种通信装置，其特征在于，包括：处理器、存储器、收发机；所述处理器，用于读取所述存储器中的计算机指令，执行：
    确定用于非正交多址接入NOMA多层传输的扩频序列组，所述终端被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
    通过所述收发机发送数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
  18. 如权利要求17所述的装置，其特征在于，所述处理器具体用于：
    根据网络设备发送的扩频序列组的配置信息，确定用于NOMA多层传输的扩频序列组；其中，所述扩频序列组的配置信息用于指示为所述终端配置的扩频序列组。
  19. 如权利要求17所述的装置，其特征在于，所述处理器具体用于：
    从扩频序列池中选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
  20. 如权利要求19所述的装置，其特征在于，所述处理器还用于：
    通过所述收发机将所选择的扩频序列组的配置信息发送给网络设备。
  21. 如权利要求19所述的装置，其特征在于，所述扩频序列池是预先配置的，或系统约定的。
  22. 一种通信装置，其特征在于，包括：处理器、存储器、收发机；所述处理器，用于读取所述存储器中的计算机指令，执行：
    确定终端用于非正交多址接入NOMA多层传输的扩频序列组，所述终端 被配置为NOMA多层传输；其中，所述扩频序列组中包括N个扩频序列，所述N个扩频序列对应于N个数据层，所述N个扩频序列之间相互正交，N为所述NOMA多层传输的数据层数，N为大于1的整数；
    通过所述收发机接收所述终端发送的数据，所述数据包括使用所述扩频序列组扩频的N个数据层。
  23. 如权利要求22所述的装置，其特征在于，所述处理器具体用于：
    从扩频序列池中为所述终端选择用于NOMA多层传输的扩频序列组；其中，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
  24. 如权利要求23所述的装置，其特征在于，所述处理器还用于：
    通过所述收发机将为所述终端选择的扩频序列组的配置信息发送给所述终端。
  25. 如权利要求22所述的装置，其特征在于，所述处理器具体用于：
    通过所述收发机接收所述终端发送的扩频序列组的配置信息，并根据所述扩频序列组的配置信息确定所述终端用于NOMA多层传输的扩频序列组；其中，所述扩频序列组是所述终端从扩频序列池中选择的，所述扩频序列池中包括M个扩频序列组，每个扩频序列组中的扩频序列之间相互正交，M为大于1的整数。
  26. 如权利要求23至25中任一项所述的装置，其特征在于，所述扩频序列池是预先配置的，或系统约定的。
  27. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行如权利要求1至7中任一项所述的方法。
  28. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质存储有计算机可执行指令，所述计算机可执行指令用于使所述计算机执行如权利要求8至14中任一项所述的方法。
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