CN110971267B - Signal transmission method and device - Google Patents

Signal transmission method and device Download PDF

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CN110971267B
CN110971267B CN201811152660.6A CN201811152660A CN110971267B CN 110971267 B CN110971267 B CN 110971267B CN 201811152660 A CN201811152660 A CN 201811152660A CN 110971267 B CN110971267 B CN 110971267B
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sequences
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CN110971267A (en
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林祥利
任斌
邢艳萍
赵铮
高秋彬
康绍莉
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Datang Mobile Communications Equipment Co Ltd
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    • 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
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Abstract

The application discloses a signal transmission method and a signal transmission device, which are used for flexibly supporting scenes of various different multiplexing user numbers in a non-orthogonal multiple access technology NOMA. The signal transmission method provided by the application comprises the following steps: determining a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in one resource group, and the value of the vector element in the pattern matrix is a weighting coefficient.

Description

Signal transmission method and device
The present application claims priority of the chinese patent application entitled "a signal transmission method and apparatus" filed by the intellectual property office of the people's republic of china at 2018, 9/27, application number 201811133519.1, which is incorporated herein by reference in its entirety.
Technical Field
The present application relates to the field of communications technologies, and in particular, to a signal transmission method and apparatus.
Background
In Non-Orthogonal Multiple Access (NOMA) technology, in order to distinguish signals of different User Equipments (UEs) on the same time-frequency resource, a transmitting end uses a Multiple Access (MA) signature for processing to assist detection of a receiving end. The MA signature may be a codeword, a codebook, a spreading sequence, an interleaving pattern, a mapping pattern, a preamble, and the like.
The NOMA technology utilizes the asymmetry of a multi-user channel, realizes the multi-dimensional non-orthogonal signal superposition transmission of time domain, frequency domain, code domain, power domain, space domain and the like by designing a multi-user unequal diversity sparse coding matrix and a coding modulation combined optimization scheme, and can obtain higher multi-user multiplexing and diversity gain.
Disclosure of Invention
The embodiment of the application discloses a signal transmission method and device, which are used for flexibly supporting scenes of various different multiplexing user numbers in a non-orthogonal multiple access technology NOMA.
On a terminal side, a signal transmission method provided in an embodiment of the present application includes:
determining a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in a resource group, and the value of a vector element in the pattern matrix is a weighting coefficient;
and carrying out signal transmission by adopting the spread spectrum sequence.
The signal transmission method can flexibly support scenes of various different multiplexing user numbers in NOMA (non-orthogonal multiple access) technology.
Optionally, the spreading sequence is preconfigured by the base station, or the spreading sequence is selected from a pattern matrix pool notified by the base station.
The base station pre-configures the spreading sequence of each terminal, and the activated terminal in the network can transmit according to the pre-configured spreading sequence; the base station may also broadcast, multicast, or notify each user one by one of a pattern matrix pool from which each terminal randomly selects a spreading sequence.
The pattern matrix pool comprises 108 pattern matrix pools with the length of the spreading sequence of 4, or 92 pattern matrix pools with the length of the spreading sequence of 4.
The pattern matrix pool with the length of 108 spreading sequences being 4 adopts the following sequence set combination, wherein, a row of elements in the matrix form a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000021
Figure BDA0001818280860000031
Figure BDA0001818280860000041
Figure BDA0001818280860000051
Figure BDA0001818280860000061
the pattern matrix pool with the length of 92 spreading sequences being 4 adopts a second sequence set, wherein one row of elements in the matrix forms one spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000062
Figure BDA0001818280860000071
Figure BDA0001818280860000081
Figure BDA0001818280860000091
optionally, when the pattern matrix pool supports 64 sequences with a length of 4 for configuration by the terminal, the spreading sequence set of the pattern matrix pool is three as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000092
Figure BDA0001818280860000101
Figure BDA0001818280860000111
or, the pattern matrix pool supporting 64 sequences is composed of 64 sequences selected from a sequence set I or a sequence set II. Optionally, when the pattern matrix pool supports 24 sequences with a length of 4 for configuration by the terminal, the 24 spreading sequence sets with a length of 4 of the pattern matrix pool are as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000112
Figure BDA0001818280860000121
or, the 24 spreading sequence sets with the length of 4 of the pattern matrix pool are as follows:
Figure BDA0001818280860000122
Figure BDA0001818280860000131
or, the 24 spreading sequence sets with the length of 4 of the pattern matrix pool are six as follows:
Figure BDA0001818280860000132
Figure BDA0001818280860000141
or, the pattern matrix pool supporting 24 sequences is composed of 24 sequences selected from the sequence set one or the sequence set two.
Optionally, when the pattern matrix pool supports 20 sequences with a length of 4 for terminal configuration, a set of 20 spreading sequences with a length of 4 of the pattern matrix pool is as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000142
Figure BDA0001818280860000151
or, the pattern matrix pool supporting 20 sequences is composed of 20 sequences selected from the sequence set one or the sequence set two.
Optionally, when the pattern matrix pool supports 16 sequences with a length of 4 for configuration by the terminal, the 16 spreading sequence sets with a length of 4 of the pattern matrix pool are eight as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000152
or, the 16 spreading sequence sets with length of 4 of the pattern matrix pool are nine as follows:
Figure BDA0001818280860000153
Figure BDA0001818280860000161
or, the pattern matrix pool capable of supporting 16 sequences is composed of 16 sequences selected from a sequence set I or a sequence set II.
Optionally, when the pattern matrix pool supports 12 sequences with a length of 4 for configuration by the terminal, the 12 spreading sequence sets with a length of 4 of the pattern matrix pool are as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000162
alternatively, the 12 spreading sequence sets of length 4 of the pattern matrix pool are eleven as follows:
Figure BDA0001818280860000163
Figure BDA0001818280860000171
or, the 12 spreading sequence sets of length 4 of the pattern matrix pool are twelve as follows:
Figure BDA0001818280860000172
or, the 12 spreading sequence sets of length 4 of the pattern matrix pool are thirteen as follows:
Figure BDA0001818280860000173
Figure BDA0001818280860000181
or, the 12 spreading sequence sets of length 4 of the pattern matrix pool are fourteen as follows:
Figure BDA0001818280860000182
or, the pattern matrix pool supporting 12 sequences is composed of 12 sequences selected from the sequence set one or the sequence set two.
Optionally, when the pattern matrix pool supports 10 sequences with a length of 4 for configuration by the terminal, the 10 spreading sequence sets with a length of 4 of the pattern matrix pool are fifteen as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000183
Figure BDA0001818280860000191
or, the 10 spreading sequence sets of length 4 of the pattern matrix pool are sixteen as follows:
Figure BDA0001818280860000192
or, the pattern matrix pool supporting 10 sequences is composed of 10 sequences selected from the sequence set one or the sequence set two.
Optionally, when the pattern matrix pool supports 8 sequences with a length of 4 for configuration by the terminal, the 8 spreading sequence sets with a length of 4 of the pattern matrix pool are seventeen as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000193
Figure BDA0001818280860000201
or the 8 spreading sequence sets of length 4 of the pattern matrix pool are as follows:
Figure BDA0001818280860000202
or the 8 spreading sequence sets with the length of 4 of the pattern matrix pool are nineteen as follows:
Figure BDA0001818280860000203
or the 8 spreading sequence sets of length 4 of the pattern matrix pool are twenty-below:
Figure BDA0001818280860000204
or, the pattern matrix pool supporting 8 sequences is composed of 8 sequences selected from a sequence set I or a sequence set II.
Optionally, when the pattern matrix pool supports 6 sequences with a length of 4 for configuration by the terminal, a set of 6 spreading sequences with a length of 4 of the pattern matrix pool is twenty-one as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000211
or, the 6 spreading sequence sets of length 4 of the pattern matrix pool are twenty-two as follows:
Figure BDA0001818280860000212
or, the 6 spreading sequence sets with length of 4 of the pattern matrix pool are twenty-three as follows:
Figure BDA0001818280860000213
or, the pattern matrix pool supporting 6 sequences is composed of 6 sequences selected from the sequence set one or the sequence set two.
Optionally, when the pattern matrix pool supports 4 sequences with a length of 4 for configuration by the terminal, the set of 4 spreading sequences with a length of 4 in the pattern matrix pool is twenty-four as follows: wherein, a row of elements in the matrix forms a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000221
or, the set of 4 spreading sequences with length of 4 in the pattern matrix pool is twenty-five as follows:
Figure BDA0001818280860000222
or, the pattern matrix pool supporting 4 sequences is composed of 4 sequences selected from the sequence set one or the sequence set two.
Optionally, when the pattern matrix pool supports 96 sequences with a length of 4 for configuration by the terminal, a set of 96 spreading sequences with a length of 4 of the pattern matrix pool is twenty-six as follows, where a row of elements of the matrix forms a spreading sequence, and a row of the matrix is equal to the number of spreading sequences:
Figure BDA0001818280860000223
Figure BDA0001818280860000231
Figure BDA0001818280860000241
Figure BDA0001818280860000251
or, the pattern matrix pool supporting 96 sequences is composed of 96 sequences selected from a sequence set.
The method for selecting the sequence set from the sequence set I or the sequence set II as the pattern matrix comprises the step of selecting a sequence set with low correlation between sequences from the sequence set I or the sequence set II, for example, the correlation between any two sequences in the selected sequence set is not more than 0.6.
On the terminal side, an embodiment of the present application provides a signal transmission apparatus, including:
the device comprises a determining unit, a calculating unit and a calculating unit, wherein the determining unit is used for determining a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in a resource group, and the value of a vector element in the pattern matrix is a weighting coefficient;
the value of the weighting coefficient can be 0, 1, -1, complex number i or-i.
And the transmission unit is used for the terminal to transmit signals by adopting the spread spectrum sequence.
Optionally, the spreading sequence is preconfigured by the base station, or the spreading sequence is selected from a pattern matrix pool notified by the base station.
Another embodiment of the present application provides a computing device, which includes a memory and a processor, wherein the memory is used for storing program instructions, and the processor is used for calling the program instructions stored in the memory and executing any one of the above methods according to the obtained program.
Another embodiment of the present application provides a computer storage medium having stored thereon computer-executable instructions for causing a computer to perform any one of the methods described above.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a sending end of a typical PDMA according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of a PDMA pattern matrix of a 6-user single layer according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a signal transmission method according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a signal transmission apparatus according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a signal transmission device according to an embodiment of the present application.
Detailed Description
With the development of mobile communication service demand, various organizations such as International Telecommunication Union (ITU) have started to research New wireless communication systems (i.e., 5G NR, 5Generation New RAT) for future mobile communication systems. Similar to the conventional Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), and Code Division Multiple Access (CDMA) Access technologies, the NOMA technology, as a key technology of the future 5G, can enable Multiple users to transmit on the same Time domain, Frequency domain, and space domain resources, and can achieve the purposes of improving the cell spectrum efficiency and the edge user spectrum efficiency, and improving the number of users accessing the cell by distinguishing through a Code domain and power. Similarly, the same user may use multiple layers for transmission, and the transmission data of the multiple layers are transmitted on the same time domain, frequency domain, and spatial domain resources, and are distinguished by the code domain, power domain, and phase.
For the NOMA technology, at present, there is no PDMA pattern matrix scheme that can flexibly support a plurality of different numbers of multiplexing users, and for the debug-free transmission of the Physical Uplink Shared Channel (PUSCH) in 5G, the users activated in the network are also different, and a flexible PDMA pattern matrix pool needs to be designed.
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The application provides a signal transmission method and equipment, which are used for flexibly supporting a plurality of scenes with different multiplexing user numbers in a non-orthogonal multiple access technology NOMA. Fig. 1 shows a block diagram of a transmitting end of a relatively typical NOMA, wherein when MA signature is a spreading sequence, the processing flow is as shown in fig. 1, and the transmitting end is for a UEKCarrying out channel coding and modulation constellation point mapping on the information source bit, then carrying out spread spectrum processing on a modulation symbol by adopting a spread spectrum sequence according to the NOMA pattern, multiplying a weighting coefficient given by the NOMA pattern to carry out Resource Element (RE) mapping (namely mapping the modulated data symbol on the Resource Element) for CP-OFDM waveform transmission, and then regenerating a CP-OFDM waveform; for DFT-S-OFDM waveform transmissionDuring the output, Discrete Fourier Transform (DFT) operation is performed, and RE mapping is performed to generate a DFT-S-OFDM waveform. Each UE adopts a spreading sequence, and different UEs respectively adopt different spreading sequences.
The NOMA sparse matrix definition is given below. Wherein the spreading is processed according to a NOMA pattern matrix. The NOMA pattern defines the mapping rules of data to resources, and particularly defines how many resources data is mapped to, which resources are mapped to, and how the data is mapped. The data of a plurality of users are mapped to the same group of resources through different NOMA coding patterns, and the number of the users supporting simultaneous transmission is larger than the number of resource blocks, so that non-orthogonal transmission is realized, and the purpose of improving the system performance is achieved.
The NOMA pattern matrix may be defined by a binary vector, the length of the vector being equal to the spreading factor, the vector elements representing values of the weighting coefficients by which the user's data is mapped to the resource units, and the mapping weighting coefficients may be 0 or 1 or-1, or complex i or-i. For convenience of expression, NOMA patterns of all users multiplexing the same group of resources are arranged together to form a NOMA pattern matrix. For example: fig. 2 is a 6-user single-layer NOMA pattern matrix, which shows a NOMA pattern matrix with 6 multiplexed users and 4 spreading sequence lengths. When the data symbol sent by the user 2 in fig. 2 is s, the data symbol sent on the resources 1-4 is [ s, s, -s after the NOMA pattern matrix processing]T。
However, currently, no NOMA pattern matrix method capable of flexibly supporting a plurality of different multiplexing user numbers exists in the existing NOMA technology, and for the debugging-free transmission of a Physical Uplink Shared Channel (PUSCH) in 5G, users activated in a network are different, and a flexible NOMA pattern matrix pool needs to be designed.
The technical scheme provided by the embodiment of the application can be suitable for various systems, particularly 5G systems. For example, the applicable system may be a global system for mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) General Packet Radio Service (GPRS) system, a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD), a Universal Mobile Telecommunications System (UMTS), a universal microwave Access (WiMAX) system, a 5G NR system, and the like. These various systems include terminal devices and network devices.
The terminal device referred to in the embodiments of the present application may refer to a device providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem. The names of the terminal devices may also be different in different systems, for example, in a 5G system, the terminal devices may be referred to as User Equipments (UEs). Wireless terminal devices, which may be mobile terminal devices such as mobile telephones (or "cellular" telephones) and computers with mobile terminal devices, e.g., mobile devices that may be portable, pocket, hand-held, computer-included, or vehicle-mounted, communicate with one or more core networks via the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiated Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. The wireless terminal device may also be referred to as a system, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile), a remote station (remote station), an access point (access point), a remote terminal device (remote terminal), an access terminal device (access terminal), a user terminal device (user terminal), a user agent (user agent), and a user device (user device), which are not limited in this embodiment of the present application.
The network device according to the embodiment of the present application may be a base station, and the base station may include a plurality of cells. A base station may also be referred to as an access point, or a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminal devices, or by other names, depending on the particular application. The network device may be configured to interconvert received air frames with Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which may include an Internet Protocol (IP) communication network. The network device may also coordinate attribute management for the air interface. For example, the network device according to the embodiment of the present application may be a Base Transceiver Station (BTS) in a global system for mobile communications (GSM) or a Code Division Multiple Access (CDMA), may also be a network device (NodeB) in a Wideband Code Division Multiple Access (WCDMA), may also be an evolved network device (eNB or e-NodeB) in a Long Term Evolution (LTE) system, a 5G base station in a 5G network architecture (next generation system), and may also be a home evolved node B (HeNB), a relay node (relay node), a home base station (femto), a pico base station (pico), and the like, which are not limited in the embodiments of the present application.
Various embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the display sequence of the embodiment of the present application only represents the sequence of the embodiment, and does not represent the merits of the technical solutions provided by the embodiments.
The terminal firstly carries out spread spectrum and coefficient weighting operation on a modulation symbol according to a corresponding spread spectrum sequence in a PDMA pattern matrix configured by a base station; wherein the length of the spreading sequence vector is equal to the spreading factor, the value of the spreading sequence represents a weighting factor value, and the weighting operation is performed by multiplying the weighting factor value by the data symbols of the resource location corresponding to the spreading sequence; then, the terminal transmits the spreading sequence of the pattern matrix or the subset of the pattern matrix by using a signal transmission method provided by the embodiment of the application.
The signal transmission method provided by the present application uses the pattern matrix provided in the following embodiments or the spreading sequence of the subset of the pattern matrix to perform transmission. When the base station pre-configures the spreading sequence of each terminal, the activated terminal in the network can transmit according to the pre-configured spreading sequence;
when the base station notifies a pattern matrix pool, each terminal randomly selects a spreading sequence from the pattern matrix pool, and the base station may notify a pattern matrix pool in a broadcasting mode, a multicasting mode or a mode of notifying each user one by one.
In the first embodiment of the present application, the pattern matrix pool is divided into the following sequence set unification or the subset of the sequence set unification, the pattern matrix pool of the sequence set unification includes 108 pattern matrix pools whose spreading sequences are 4 in length, and the first embodiment of the present application further provides 92 pattern matrix pools whose spreading sequences are 4 in length.
The first embodiment is as follows:
in a scheduling free (grant free) PUSCH, assuming that a terminal uses DFT-S-OFDM waveform transmission, a base station configures 108 pattern matrix pools with a spreading sequence length of 4 for terminals in a cell, and adopts a sequence set combination, and an activated UE selects a spreading sequence from the set according to the configuration of the base station for transmission.
The first pattern matrix pool with the length of 108 spreading sequences being 4 adopts the following sequence set combination, wherein, a row of elements in the matrix form a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000311
Figure BDA0001818280860000321
Figure BDA0001818280860000331
Figure BDA0001818280860000341
the second pattern matrix pool with the length of 92 spreading sequences being 4 adopts a second sequence set, wherein one row of elements of the matrix forms one spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000342
Figure BDA0001818280860000351
Figure BDA0001818280860000361
Figure BDA0001818280860000371
example two:
the pattern matrix pool can support 64 sequences with length of 4 for configuration of the terminal, and the spreading sequence set of the pattern matrix pool is three as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000381
Figure BDA0001818280860000391
Figure BDA0001818280860000401
the 64 sequences configured for the terminal, i.e. the PDMA pattern matrix of 4 × 64, may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example three:
when the pattern matrix pool can support 24 length-4 sequences for configuration by the terminal, the 24 length-4 spreading sequence sets of the pattern matrix pool are as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000402
Figure BDA0001818280860000411
the 24 sequences configured for the terminal, i.e. the PDMA pattern matrix of 4 × 24, may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example four:
when the pattern matrix pool can support 20 sequences with length of 4 for configuration by the terminal, the 20 spreading sequence sets with length of 4 of the pattern matrix pool are as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000412
Figure BDA0001818280860000421
the 20 sequences configured for the terminal, i.e. the PDMA pattern matrix of 4 × 20, may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example five:
when the pattern matrix pool can support 16 sequences with length of 4 for configuration by the terminal, the 16 spreading sequence sets with length of 4 of the pattern matrix pool are as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000422
the PDMA pattern matrix of 16 sequences, i.e. 4 × 16, configured for the terminal may also be selected from the sequence set i or the sequence set ii provided in the first embodiment.
Example six:
when the pattern matrix pool can support 12 sequences with length of 4 for terminal configuration, a set of 12 spreading sequences with length of 4 in the pattern matrix pool is as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000431
the 12 sequences configured for the terminal, i.e. the PDMA pattern matrix of 4 × 12, may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example seven:
when the pattern matrix pool can support 10 sequences with length of 4 for configuration by the terminal, the 10 spreading sequence sets with length of 4 of the pattern matrix pool are eight as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000432
Figure BDA0001818280860000441
the 10 sequences configured for the terminal, i.e. the PDMA pattern matrix of 4 × 10, may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example eight:
when the pattern matrix pool can support 8 sequences with length of 4 for configuration by the terminal, the 8 spreading sequence sets with length of 4 of the pattern matrix pool are nine as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000442
the PDMA pattern matrix of 8 sequences, i.e. 4 × 8, configured for the terminal may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example nine:
when the pattern matrix pool can support 6 sequences with length of 4 for configuration of the terminal, the 6 spreading sequence sets with length of 4 of the pattern matrix pool are as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000443
Figure BDA0001818280860000451
the PDMA pattern matrix of 6 sequences, i.e. 4 × 6, configured for the terminal may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example ten:
when the pattern matrix pool can support 4 length-4 sequences for configuration by the terminal, the set of 4 length-4 spreading sequences of the pattern matrix pool is eleven as follows: wherein, a row element of the matrix forms a spread spectrum sequence, and the row number of the matrix is equal to the number of the spread spectrum sequence:
Figure BDA0001818280860000452
the 4 sequences configured for the terminal, i.e. the PDMA pattern matrix of 4 × 4, may also be selected from the sequence set one or the sequence set two provided in the above-mentioned embodiment one.
Example eleven:
when the pattern matrix pool supports 96 sequences with the length of 4 for configuration by the terminal, the 96 spreading sequence sets with the length of 4 of the pattern matrix pool are as follows, wherein one row of elements of the matrix forms one spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000453
Figure BDA0001818280860000461
Figure BDA0001818280860000471
Figure BDA0001818280860000481
the above-mentioned pattern matrix pool supporting 96 sequences may be composed of 96 sequences selected from a set of sequences.
The method for selecting the sequence set from the sequence set I or the sequence set II as the pattern matrix comprises the step of selecting a sequence set with low correlation between sequences from the sequence set I or the sequence set II, for example, the correlation between any two sequences in the selected sequence set is not more than 0.6.
In summary, at the terminal side, an embodiment of the present application provides a signal transmission method, referring to fig. 3, including:
s101, determining a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in a resource group, and the value of a vector element in the pattern matrix is a weighting coefficient;
and S102, carrying out signal transmission by adopting the spread spectrum sequence.
Accordingly, the embodiment of the present application provides a signal transmission apparatus on the terminal side, referring to fig. 4, including:
a determining unit 11, configured to determine a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in a resource group, and the value of a vector element in the pattern matrix is a weighting coefficient;
and a transmission unit 12, configured to perform signal transmission by using the spreading sequence.
The method and the device are based on the same application concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The embodiment of the present application provides a computing device, which may specifically be a desktop computer, a portable computer, a smart phone, a tablet computer, a Personal Digital Assistant (PDA), and the like. The computing device may include a Central Processing Unit (CPU), memory, input/output devices, etc., the input devices may include a keyboard, mouse, touch screen, etc., and the output devices may include a Display device, such as a Liquid Crystal Display (LCD), a Cathode Ray Tube (CRT), etc.
The memory may include Read Only Memory (ROM) and Random Access Memory (RAM), and provides the processor with program instructions and data stored in the memory. In the embodiments of the present application, the memory may be used for storing a program of any one of the methods provided by the embodiments of the present application.
The processor is used for executing any one of the methods provided by the embodiment of the application according to the obtained program instructions by calling the program instructions stored in the memory.
On the terminal side, an embodiment of the present application provides a signal transmission apparatus, see fig. 5, including:
the processor 600, which is used to read the program in the memory 620, executes the following processes:
processor 600 determines a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in a resource group, and the value of a vector element in the pattern matrix is a weighting coefficient;
the spreading sequence is employed for signal transmission by the transceiver 610.
Optionally, the spreading sequence is preconfigured by the base station, or the spreading sequence is selected from a pattern matrix pool notified by the base station.
Optionally, the pattern matrix pool includes 108 pattern matrix pools with spreading sequences of length 4, or 92 pattern matrix pools with spreading sequences of length 4.
The first pattern matrix pool with the length of 108 spreading sequences being 4 adopts the following sequence set combination, wherein, a spreading sequence is formed by one row of elements of the matrix, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000511
Figure BDA0001818280860000521
Figure BDA0001818280860000531
Figure BDA0001818280860000541
the second pattern matrix pool with the length of 92 spreading sequences being 4 adopts a second sequence set, wherein one row of elements of the matrix forms one spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure BDA0001818280860000542
Figure BDA0001818280860000551
Figure BDA0001818280860000561
Figure BDA0001818280860000571
optionally, when the pattern matrix pool supports 96 sequences with a length of 4 for configuration by the terminal, the 96 spreading sequences with a length of 4 in the pattern matrix pool are collected as follows, where a row of elements in the matrix forms a spreading sequence, and the number of rows in the matrix is equal to the number of spreading sequences:
Figure BDA0001818280860000581
Figure BDA0001818280860000591
Figure BDA0001818280860000601
Figure BDA0001818280860000611
or, the pattern matrix pool supporting 96 sequences is composed of 96 sequences selected from a sequence set.
Optionally, the design of the pattern matrix is designed according to the sequence of the highest supportable different sizes of the pattern matrix pool for the terminal configuration, see the specific embodiment of the present application.
A transceiver 610 for receiving and transmitting data under the control of the processor 600.
Wherein in fig. 5, the bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 600, and various circuits of memory, represented by memory 620, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 610 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. For different user devices, the user interface 630 may also be an interface capable of interfacing with a desired device externally, including but not limited to a keypad, display, speaker, microphone, joystick, etc.
The processor 600 is responsible for managing the bus architecture and general processing, and the memory 620 may store data used by the processor 600 in performing operations.
Alternatively, the processor 600 may be a CPU (central processing unit), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), or a CPLD (Complex Programmable Logic Device).
Embodiments of the present application provide a computer storage medium for storing computer program instructions for an apparatus provided in the embodiments of the present application, which includes a program for executing any one of the methods provided in the embodiments of the present application.
The computer storage media may be any available media or data storage device that can be accessed by a computer, including, but not limited to, magnetic memory (e.g., floppy disks, hard disks, magnetic tape, magneto-optical disks (MOs), etc.), optical memory (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor memory (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND FLASH), Solid State Disks (SSDs)), etc.
The method provided by the embodiment of the application can be applied to terminal equipment and also can be applied to network equipment.
The Terminal device may also be referred to as a User Equipment (User Equipment, abbreviated as "UE"), a Mobile Station (Mobile Station, abbreviated as "MS"), a Mobile Terminal (Mobile Terminal), or the like, and optionally, the Terminal may have a capability of communicating with one or more core networks through a Radio Access Network (RAN), for example, the Terminal may be a Mobile phone (or referred to as a "cellular" phone), a computer with Mobile property, or the like, and for example, the Terminal may also be a portable, pocket, hand-held, computer-built-in, or vehicle-mounted Mobile device.
A network device may be a base station (e.g., access point) that refers to a device in an access network that communicates over the air-interface, through one or more sectors, with wireless terminals. The base station may be configured to interconvert received air frames and IP packets as a router between the wireless terminal and the rest of the access network, which may include an Internet Protocol (IP) network. The base station may also coordinate management of attributes for the air interface. For example, the Base Station may be a Base Transceiver Station (BTS) in GSM or CDMA, a Base Station (NodeB) in WCDMA, an evolved Node B (NodeB or eNB or e-NodeB) in LTE, or a gNB in 5G system. The embodiments of the present application are not limited.
The above method process flow may be implemented by a software program, which may be stored in a storage medium, and when the stored software program is called, the above method steps are performed.
In summary, the signal transmission method provided by the present application uses the pattern matrix or the spreading sequence of the subset of the pattern matrix provided in the foregoing embodiment for transmission, and is suitable for a scenario in which different users are multiplexed in NOMA.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (14)

1. A method of signal transmission, the method comprising:
determining a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in a resource group, and the value of a vector element in the pattern matrix is a weighting coefficient;
performing signal transmission by using the spread spectrum sequence;
wherein the spreading sequence is selected from a pattern matrix pool informed by a base station;
the pattern matrix pool comprises 108 pattern matrix pools with the length of the spreading sequence being 4;
or the pattern matrix pool comprises 92 pattern matrix pools with the length of the spreading sequences being 4;
the pattern matrix pool with the length of 108 spreading sequences being 4 adopts the following sequence set combination, wherein, a row of elements in the matrix form a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure FDF0000014907180000011
Figure FDF0000014907180000021
Figure FDF0000014907180000031
Figure FDF0000014907180000041
Figure FDF0000014907180000051
the pattern matrix pool with the length of 92 spreading sequences being 4 adopts a second sequence set, wherein one row of elements in the matrix forms one spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure FDF0000014907180000052
Figure FDF0000014907180000061
Figure FDF0000014907180000071
Figure FDF0000014907180000081
2. the method of claim 1, wherein when the pool of pattern matrices supports 64 sequences with length 4 for terminal configuration, the spreading sequences of the pool of pattern matrices are collected as follows, wherein one row of elements in a matrix constitutes one spreading sequence, and the number of rows of a matrix is equal to the number of spreading sequences:
Figure FDF0000014907180000082
Figure FDF0000014907180000091
Figure FDF0000014907180000101
or, the pattern matrix pool supporting 64 sequences is composed of 64 sequences selected from a sequence set I or a sequence set II.
3. The method of claim 1, wherein when the pool of pattern matrices supports 24 length-4 sequences for terminal configuration, the 24 length-4 spreading sequences of the pool of pattern matrices are collected as follows, wherein one row of elements in a matrix constitutes one spreading sequence, and the number of rows of a matrix is equal to the number of spreading sequences:
Figure FDF0000014907180000102
Figure FDF0000014907180000111
or, the 24 spreading sequence sets with the length of 4 of the pattern matrix pool are as follows:
Figure FDF0000014907180000112
Figure FDF0000014907180000121
or, the 24 spreading sequence sets with the length of 4 of the pattern matrix pool are six as follows:
Figure FDF0000014907180000122
Figure FDF0000014907180000131
or, the pattern matrix pool supporting 24 sequences is composed of 24 sequences selected from the sequence set one or the sequence set two.
4. The method of claim 1, wherein when the pool of pattern matrices supports 20 sequences with length 4 for terminal configuration, the 20 spreading sequences with length 4 of the pool of pattern matrices are collected as follows, wherein a row of elements in a matrix constitutes one spreading sequence, and the number of rows of a matrix is equal to the number of spreading sequences:
Figure FDF0000014907180000132
Figure FDF0000014907180000141
or, the pattern matrix pool supporting 20 sequences is composed of 20 sequences selected from the sequence set one or the sequence set two.
5. The method of claim 1, wherein when the pool of pattern matrices supports 16 sequences with length 4 for configuration by the terminal, the 16 spreading sequences with length 4 of the pool of pattern matrices are grouped into eight sets as follows, wherein one row of elements in a matrix constitutes one spreading sequence, and the number of rows of a matrix is equal to the number of spreading sequences:
Figure FDF0000014907180000142
or, the 16 spreading sequence sets with length of 4 of the pattern matrix pool are nine as follows:
Figure FDF0000014907180000143
Figure FDF0000014907180000151
or, the pattern matrix pool capable of supporting 16 sequences is composed of 16 sequences selected from a sequence set I or a sequence set II.
6. The method of claim 1, wherein when the pool of pattern matrices supports 12 sequences with length 4 for the terminal to configure, the set of 12 spreading sequences with length 4 of the pool of pattern matrices is as follows, wherein one row of elements in a matrix constitutes one spreading sequence, and the number of rows of a matrix is equal to the number of spreading sequences:
Figure FDF0000014907180000152
Figure FDF0000014907180000161
alternatively, the 12 spreading sequence sets of length 4 of the pattern matrix pool are eleven as follows:
Figure FDF0000014907180000162
or, the 12 spreading sequence sets of length 4 of the pattern matrix pool are twelve as follows:
Figure FDF0000014907180000163
Figure FDF0000014907180000171
or, the 12 spreading sequence sets of length 4 of the pattern matrix pool are thirteen as follows:
Figure FDF0000014907180000172
or, the 12 spreading sequence sets of length 4 of the pattern matrix pool are fourteen as follows:
Figure FDF0000014907180000173
or, the pattern matrix pool supporting 12 sequences is composed of 12 sequences selected from the sequence set one or the sequence set two.
7. The method of claim 1, wherein when the pool of pattern matrices supports 10 length-4 sequences for terminal configuration, the 10 length-4 spreading sequence sets of the pool of pattern matrices are fifteen as follows, wherein one row of matrix elements constitutes one spreading sequence, and the number of matrix rows is equal to the number of spreading sequences:
Figure FDF0000014907180000181
or, the 10 spreading sequence sets of length 4 of the pattern matrix pool are sixteen as follows:
Figure FDF0000014907180000182
or, the pattern matrix pool supporting 10 sequences is composed of 10 sequences selected from the sequence set one or the sequence set two.
8. The method of claim 1, wherein when the pool of pattern matrices supports 8 sequences of length 4 for configuration by the terminal, the 8 spreading sequence sets of length 4 of the pool of pattern matrices are seventeen as follows, wherein a row of elements of a matrix constitutes a spreading sequence, and the number of rows of a matrix is equal to the number of spreading sequences:
Figure FDF0000014907180000191
or the 8 spreading sequence sets of length 4 of the pattern matrix pool are as follows:
Figure FDF0000014907180000192
or the 8 spreading sequence sets with the length of 4 of the pattern matrix pool are nineteen as follows:
Figure FDF0000014907180000193
or the 8 spreading sequence sets of length 4 of the pattern matrix pool are twenty-below:
Figure FDF0000014907180000201
or, the pattern matrix pool supporting 8 sequences is composed of 8 sequences selected from a sequence set I or a sequence set II.
9. The method of claim 1, wherein when the pool of pattern matrices supports 6 sequences with a length of 4 for configuration by the terminal, a set of 6 spreading sequences with a length of 4 of the pool of pattern matrices is twenty-one as follows, wherein one row of elements in a matrix constitutes one spreading sequence, and the number of rows of a matrix is equal to the number of spreading sequences:
Figure FDF0000014907180000202
or, the 6 spreading sequence sets of length 4 of the pattern matrix pool are twenty-two as follows:
Figure FDF0000014907180000203
or, the 6 spreading sequence sets with length of 4 of the pattern matrix pool are twenty-three as follows:
Figure FDF0000014907180000211
or, the pattern matrix pool supporting 6 sequences is composed of 6 sequences selected from the sequence set one or the sequence set two.
10. The method of claim 1, wherein when the pool of pattern matrices supports 4 sequences with length 4 for configuration by the terminal, the set of 4 spreading sequences with length 4 of the pool of pattern matrices is twenty-four as follows, wherein a row of matrix elements constitutes one spreading sequence, and the number of matrix rows is equal to the number of spreading sequences:
Figure FDF0000014907180000212
or, the set of 4 spreading sequences with length of 4 in the pattern matrix pool is twenty-five as follows:
Figure FDF0000014907180000213
or, the pattern matrix pool supporting 4 sequences is composed of 4 sequences selected from the sequence set one or the sequence set two.
11. The method of claim 1, wherein when the pool of pattern matrices supports 96 sequences of length 4 for configuration by the terminal, the 96 spreading sequences of length 4 of the pool of pattern matrices are grouped into twenty-six as follows, wherein a row of matrix elements constitutes a spreading sequence, and the number of matrix rows is equal to the number of spreading sequences:
Figure FDF0000014907180000221
Figure FDF0000014907180000231
Figure FDF0000014907180000241
Figure FDF0000014907180000251
or, the pattern matrix pool supporting 96 sequences is composed of 96 sequences selected from a sequence set.
12. A signal transmission apparatus, comprising:
the device comprises a determining unit, a calculating unit and a calculating unit, wherein the determining unit is used for determining a spreading sequence corresponding to a non-orthogonal multiple access NOMA pattern matrix; the length of the spread spectrum sequence is equal to the number of resource units in a resource group, and the value of a vector element in the pattern matrix is a weighting coefficient;
a transmission unit, configured to perform signal transmission by using the spreading sequence;
wherein the spreading sequence is selected from a pattern matrix pool informed by a base station;
the pattern matrix pool comprises 108 pattern matrix pools with the length of the spreading sequence being 4;
or the pattern matrix pool comprises 92 pattern matrix pools with the length of the spreading sequences being 4;
the pattern matrix pool with the length of 108 spreading sequences being 4 adopts the following sequence set combination, wherein, a row of elements in the matrix form a spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure FDF0000014907180000252
Figure FDF0000014907180000261
Figure FDF0000014907180000271
Figure FDF0000014907180000281
Figure FDF0000014907180000291
the pattern matrix pool with the length of 92 spreading sequences being 4 adopts a second sequence set, wherein one row of elements in the matrix forms one spreading sequence, and the row number of the matrix is equal to the number of the spreading sequences:
Figure FDF0000014907180000292
Figure FDF0000014907180000301
Figure FDF0000014907180000311
Figure FDF0000014907180000321
13. a computing device, comprising:
a memory for storing program instructions;
a processor for calling program instructions stored in said memory to execute the method of any one of claims 1 to 11 in accordance with the obtained program.
14. A computer storage medium having stored thereon computer-executable instructions for causing a computer to perform the method of any one of claims 1 to 11.
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