WO2019193728A1 - Terminal d'utilisateur et procédé de communication - Google Patents

Terminal d'utilisateur et procédé de communication Download PDF

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Publication number
WO2019193728A1
WO2019193728A1 PCT/JP2018/014639 JP2018014639W WO2019193728A1 WO 2019193728 A1 WO2019193728 A1 WO 2019193728A1 JP 2018014639 W JP2018014639 W JP 2018014639W WO 2019193728 A1 WO2019193728 A1 WO 2019193728A1
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WIPO (PCT)
Prior art keywords
unit
user terminal
base station
bit string
interleaver
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Application number
PCT/JP2018/014639
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English (en)
Japanese (ja)
Inventor
大樹 武田
和晃 武田
ウェンジャ リュー
ジュンシン ワン
ギョウリン コウ
リュー リュー
Original Assignee
株式会社Ｎｔｔドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to PCT/JP2018/014639 priority Critical patent/WO2019193728A1/fr
Publication of WO2019193728A1 publication Critical patent/WO2019193728A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0067—Rate matching
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal

Definitions

  • the present disclosure relates to a user terminal and a communication method related to wireless communication.
  • 3GPP (Third Generation Partnership Project) is studying MUST (Multi-User Superposition Transmission).
  • MUST Multi-User Superposition Transmission
  • NOMA non-orthogonal multiple access
  • NOMA orthogonal multiple access
  • Non-patent Document 1 In 3GPP, not only the downlink (DL: DownLink) but also the uplink (UL: UpLink) NOMA scheme has been studied, and various UL NOMA schemes have been proposed (Non-patent Document 1).
  • An object of the present disclosure is to provide a user terminal and a communication method that perform a new UL NOMA scheme.
  • a user terminal is a user terminal that wirelessly transmits uplink data to a base station using a NOMA (Non-Orthogonal Multiple Access) scheme, and performs coding on a bit string of the uplink data
  • NOMA Non-Orthogonal Multiple Access
  • MA Multiple Access
  • the communication system 1 includes a base station 100 and a plurality of user terminals 200.
  • each user terminal 200 When applying the UL NOMA scheme, each user terminal 200 performs UL processing based on the NOMA scheme on UL data to generate a UL signal. Each user terminal 200 transmits the generated UL signal using radio resources having the same time and the same frequency (physical resource # 0 in FIG. 1).
  • the base station 100 receives a UL signal synthesized signal (including noise) transmitted from each user terminal 200 through a channel. Then, the base station 100 extracts UL data of each user terminal 200 from the received combined signal according to the UL NOMA scheme.
  • Non-Patent Document 1 As NOMA scheme of UL, various NOMA schemes have been proposed as shown in Non-Patent Document 1 and FIG.
  • the user terminal 200 includes a bit level calculation unit 201, a symbol level calculation unit 202, and a transmission unit 203 as a configuration related to UL processing.
  • the bit level operation unit 201 performs a bit level operation on the UL data to generate a bit string. Details of each process performed by the bit level calculation unit 201 will be described later (see FIG. 3).
  • the symbol level calculation unit 202 performs a symbol level calculation on the bit string generated by the bit level calculation unit 201 to generate a symbol string. Details of each process performed by the symbol level calculation unit 202 will be described later (see FIG. 4).
  • the transmission unit 203 generates a UL signal from the symbol sequence generated by the symbol level calculation unit 202.
  • the transmission unit 203 performs processing related to OFDM (Orthogonal Frequency Division Division Multiplexing) such as IFFT (Inverse / Fast / Fourier / Transform) and CP (Cyclic / Prefix) insertion. Then, the transmission unit 203 transmits the generated UL signal (radio signal) from an antenna (not shown).
  • OFDM Orthogonal Frequency Division Division Multiplexing
  • IFFT Inverse / Fast / Fourier / Transform
  • CP Cyclic / Prefix
  • bit level calculation unit 201 Next, an example of the bit level calculation unit 201 will be described with reference to FIG.
  • the bit level calculation unit 201 includes a segmentation unit 301, a first interleaver 302, an encoding unit 303, a second interleaver 304, a rate matching unit 305, a third interleaver 306, and a first conversion unit 307 as processing modules. Including. However, the bit level calculation unit 201 does not necessarily include all these processing modules, and may include only the processing modules employed by the communication system 1.
  • the segmentation unit 301 divides, for example, UL data input from an upper layer into a plurality of bit strings, and outputs each to the first interleaver 302.
  • the first interleaver 302 interleaves the bit string input from the segmentation unit 301 and outputs it to the encoding unit 303.
  • the encoding unit 303 performs FEC (Forward Error Correction) on the bit string input from the first interleaver 302 and outputs the result to the second interleaver 304.
  • FEC Forward Error Correction
  • the second interleaver 304 interleaves the bit string input from the encoding unit 303 and outputs it to the rate matching unit 305.
  • the rate matching unit 305 performs rate matching on the bit string input from the second interleaver 304 (for example, performs bit repetition (repetition) or puncturing (decimation)), and outputs the result to the third interleaver 306.
  • the third interleaver 306 interleaves the bit string input from the rate matching unit 305 and outputs it to the first conversion unit 307.
  • the first conversion unit 307 converts the plurality of bit strings input in parallel from the plurality of third interleavers 306 into the same or different number of parallel bit strings, and each modulation unit 401 (see FIG. 4).
  • the first conversion unit 307 may convert a plurality of bit strings input in parallel into a serial bit string.
  • Symbol level calculation section 202 includes modulation section 401, spreading section 402, fourth interleaver 403, power adjustment section 404, second conversion section 405, RE mapping section 406, DMRS section 407, and precoder 408 as processing modules. .
  • the symbol level calculation unit 202 does not necessarily include all of these processing modules, and may include only the processing modules employed by the communication system 1.
  • Modulation section 401 modulates the bit string input from first conversion section 307 shown in FIG. 3 to generate a symbol string, and outputs it to spreading section 402.
  • Spreading section 402 spreads the symbol string input from modulating section 401 and outputs the result to fourth interleaver 403.
  • the fourth interleaver 403 interleaves the symbol sequence input from the spreading unit 402 and outputs it to the power adjustment unit 404.
  • the power adjustment unit 404 adjusts the power of the symbol string input from the fourth interleaver 403 and outputs it to the second conversion unit 405.
  • the second conversion unit 405 converts the plurality of symbol sequences input in parallel from the plurality of power adjustment units 404 into the same or different number of parallel symbol sequences, and outputs the parallel symbol sequences to each RE mapping unit 406. Note that the second conversion unit 405 may convert a plurality of symbol strings input in parallel into a serial symbol string.
  • the RE mapping unit 406 maps the symbol string input from the second conversion unit 405 to an RE (Resource Element).
  • the DMRS unit 407 maps DMRS (Demodulation Reference Signal) to an RE different from the RE mapped by the RE mapping unit 406.
  • DMRS Demodulation Reference Signal
  • the precoder 408 performs precoding on the symbol sequence mapped to the RE and the DMRS, and outputs the result to the transmission unit 203 (see FIG. 2).
  • NOMA Non-Patent Document 2.
  • SCMA Sparse code multiple access
  • PDMA Pattern division multiple access
  • LDS-SVE Low density spreading with signature vector extension
  • MUSA Multi user shared access
  • NOCA Non-orthogonal coded access
  • NCMA Non-orthogonal coded multiple access
  • LSSA Low code rate and signature based shared access
  • IGMA Interleave-Grid Multiple Access
  • GOCA Group Orthogonal Coded Access RSMA: Resource spread multiple access
  • RDMA Repetition division multiple access
  • IDMA Interleave Division Multiple Access
  • LCRS Low Code Rate Spreading NOMA: Non-orthogonal multiple access
  • FIG. 5 lists the processing modules included in the bit level calculation unit 201 described in FIG. 3 and the processing modules included in the symbol level calculation unit 202 described in FIG.
  • “O” shown in FIG. 5 indicates which of the processing modules shown in the column uses the MA signature in the NOMA scheme shown in the row.
  • the modulation unit 401, the spreading unit 402, and the RE mapping unit 406 are marked with “ ⁇ ”. This indicates that in the NOMA scheme “SCMA”, the modulation unit 401, the spreading unit 402, and the RE mapping unit 406 perform processing using the MA signature.
  • the base station 100 that has received the combined signal (see FIG. 1) from the plurality of user terminals 200 can extract the UL data of each user terminal 200 from the combined signal.
  • the MA signature means for example, applying one pattern designated by the base station 100 or selected by the user terminal 200 from among a plurality of patterns.
  • the spreading unit 402 may apply different spreading codes between the user terminals 200 as the MA signature.
  • systems 1, 2, and 3 in which at least one of the first interleaver 302 and the second interleaver 304 in which “O” is not shown in FIG. 5 use the MA signature will be described.
  • the first interleaver 302 in the previous stage of the encoding unit 303 interleaves using the MA signature.
  • the first interleaver 302 applies different interleaving patterns between the user terminals 200 as the MA signature.
  • the base station 100 can distinguish UL data of each user terminal 200 from the interleave pattern.
  • a second interleaver 304 between the encoding unit 303 (channel coding) and the rate matching unit 305 performs interleaving using the MA signature.
  • the second interleaver 304 applies different interleaving patterns between the user terminals 200 as the MA signature.
  • At least one of the first interleaver 302 and the second interleaver 304 and at least one of the other processing modules use the MA signature.
  • the second interleaver 304 and the spreading unit 402 use the MA signature.
  • the base station 100 can distinguish the UL data of each user terminal 200 from the combination of the interleaving pattern used by the second interleaver 304 and the spreading code pattern used by the spreading unit 402.
  • the second interleaver 304 performs interleaving using the 1A MA signature
  • the spreading unit 402 performs spreading code using the 2A MA signature
  • the RE mapping unit 406 performs the first mapping. Mapping is performed using the 3A MA signature.
  • second interleaver 304 performs interleaving using the 1B MA signature
  • spreading section 402 performs spreading code using the 2B MA signature
  • RE mapping section 406 performs first interleaving. Mapping is performed using the 3B MA signature.
  • the base station 100 determines that the combined signal (see FIG. 1). From this, it is possible to extract the UL data of the user terminal 200 # 1 and the UL data of the user terminal 200 # 2.
  • the spreading unit 402 and the RE mapping unit 406 use MA signatures for the UL data # 1 and # 2, respectively.
  • the MA signature may be used in the DMRS unit 407 and the precoder 408 in addition to the RE mapping unit 406.
  • variations that can be taken by a plurality of processing modules using the MA signature are larger than variations that can be taken by one processing module using the MA signature. Therefore, according to FIG.6 and FIG.7, UL data of more user terminals 200 can be multiplexed on radio resources of the same time and the same frequency. That is, a more efficient NOMA scheme can be realized.
  • this embodiment is applicable to any one of mMTC (massive Machine Type Communications), URLLC (Ultra-Reliable and Low Latency Communications), and eMBB (enhanced Mobile Broadband).
  • the present embodiment can be applied to either a guarantee-based NOMA scheme or a guarantee-free NOMA scheme.
  • this embodiment can be applied to both a single layer configuration and a multi-layer configuration.
  • the user terminal 200 may select an MA signature to be used based on conditions predetermined with the base station 100.
  • the user terminal 200 may select an MA signature to be used in accordance with signaling from the base station 100. This signaling may include information indicating the MA signature used by the user terminal 200.
  • a user terminal that wirelessly transmits uplink data to a base station using a NOMA (Non-Orthogonal Multiple Access) scheme, an encoding unit 303 that encodes the bit string of the uplink data, Arranged in the subsequent stage of the encoding unit 303, disposed in at least one of the rate matching unit 305 that performs rate matching on the bit string, the previous stage of the encoding unit 303, and between the encoding unit 303 and the rate matching unit 305.
  • Interleaver / scramblers 302 and 304 that perform at least one of interleaving and scrambling using a MA (Multiple Access) signature for the bit string.
  • each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.
  • the base station 100, the user terminal 200, and the like may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 8 is a diagram illustrating an example of a hardware configuration of the base station 100 and the user terminal 200 according to an embodiment of the present disclosure.
  • the base station 100 and the user terminal 200 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
  • the term “apparatus” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the base station and the user terminal may be configured to include one or a plurality of devices illustrated in the figure, or may be configured not to include some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the base station and the user terminal reads predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the processor 1001 performs computation to perform communication by the communication device 1004 or the memory 1002. This is realized by controlling reading and / or writing of data in the storage 1003.
  • the processor 1001 controls the entire computer by operating an operating system, for example.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
  • CPU central processing unit
  • bit level calculation unit 201, symbol level calculation unit 202, transmission unit 203, and the like may be realized by the processor 1001.
  • a necessary table may be stored in the memory 1002.
  • the processor 1001 reads a program (program code), software module, or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
  • a program program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
  • the functional blocks constituting the base station 100 and the user terminal 200 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and other functional blocks are similarly realized. May be.
  • the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium, and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium such as an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (eg, a compact disc, a digital versatile disc, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • the storage 1003 may be referred to as an auxiliary storage device.
  • the storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
  • a network device for example, the above-described transmission unit 203, antenna (not shown), and the like may be realized by the communication device 1004.
  • the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
  • the base station 100 and the user terminal 200 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). Hardware may be configured, and a part or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • information notification includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof.
  • RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA.
  • LTE Long Term Evolution
  • LTE-A Long Term Evolution-Advanced
  • SUPER 3G IMT-Advanced
  • 4G 5G
  • FRA Full Radio Access
  • W-CDMA Wideband
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB User Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 UWB (Ultra-WideBand
  • the present invention may be applied to a Bluetooth (registered trademark), a system using other appropriate systems, and / or a next generation system extended based on these systems.
  • the specific operation assumed to be performed by the base station (radio base station) in this specification may be performed by the upper node in some cases.
  • various operations performed for communication with a terminal may be performed by the base station and / or other network nodes other than the base station (e.g., It is obvious that this can be performed by MME (Mobility Management Entity) or S-GW (Serving Gateway).
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Information, signals, and the like can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.
  • Input / output information and the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.
  • the determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).
  • software, instructions, etc. may be transmitted / received via a transmission medium.
  • software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave.
  • DSL digital subscriber line
  • wireless technology such as infrared, wireless and microwave.
  • Information, signal Information, signals, etc. described herein may be represented using any of a variety of different technologies.
  • data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of
  • the channel and / or symbol may be a signal.
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell, or the like.
  • radio resource may be indicated by an index.
  • a base station can accommodate one or more (eg, three) cells (also referred to as sectors). When the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, indoor small base station RRH: Remote Radio Head) can also provide communication services.
  • the term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication services in this coverage. Further, the terms “base station”, “eNB”, “cell”, and “sector” may be used interchangeably herein.
  • a base station may also be referred to in terms such as a fixed station, NodeB, eNodeB (eNB), access point, femtocell, small cell, and the like.
  • a user terminal is a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile by a person skilled in the art It may also be referred to as a terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, UE (User Equipment), or some other appropriate terminology.
  • determining may encompass a wide variety of actions. “Judgment” and “determination” are, for example, judgment, calculation, calculation, processing, derivation, investigating, looking up (eg, table , Searching in a database or another data structure), considering ascertaining as “determining”, “deciding”, and the like.
  • determination and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (e.g., accessing data in a memory) may be considered as “determined” or "determined”.
  • determination and “decision” means that “resolving”, “selecting”, “choosing”, “establishing”, and “comparing” are regarded as “determining” and “deciding”. May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.
  • connection means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements.
  • the coupling or connection between the elements may be physical, logical, or a combination thereof.
  • the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples
  • electromagnetic energy such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot depending on an applied standard.
  • the correction RS may be referred to as TRS (Tracking ⁇ RS), PC-RS (Phase Compensation RS), PTRS (Phase Tracking RS), or Additional RS.
  • the demodulation RS and the correction RS may be called differently corresponding to each. Further, the demodulation RS and the correction RS may be defined by the same name (for example, the demodulation RS).
  • the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • the radio frame may be composed of one or a plurality of frames in the time domain.
  • One or more frames in the time domain may be referred to as subframes, time units, etc.
  • a subframe may further be composed of one or more slots in the time domain.
  • the slot may be further configured with one or a plurality of symbols (OFDM (Orthogonal-Frequency-Division-Multiplexing) symbol, SC-FDMA (Single-Carrier-Frequency-Division-Multiple-Access) symbol, etc.) in the time domain.
  • OFDM Orthogonal-Frequency-Division-Multiplexing
  • SC-FDMA Single-Carrier-Frequency-Division-Multiple-Access
  • the radio frame, subframe, slot, and symbol all represent a time unit when transmitting a signal. Radio frames, subframes, slots, and symbols may be called differently corresponding to each.
  • the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used in each mobile station) to each mobile station.
  • the minimum time unit of scheduling may be called TTI (Transmission Time Interval).
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot may be called a TTI
  • the resource unit is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • one or a plurality of symbols may be included, and one slot, one subframe, or a length of 1 TTI may be included.
  • One TTI and one subframe may each be composed of one or a plurality of resource units.
  • the resource unit may also be called a resource block (RB: Resource Block), a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, a scheduling unit, a frequency unit, or a subband.
  • the resource unit may be composed of one or a plurality of REs.
  • 1 RE may be any resource (for example, the smallest resource unit) smaller than a resource unit serving as a resource allocation unit, and is not limited to the name RE.
  • the structure of the radio frame described above is merely an example, and the number of subframes included in the radio frame, the number of slots included in the subframe, the number of symbols and resource blocks included in the slots, and the subframes included in the resource block
  • the number of carriers can be variously changed.
  • notification of predetermined information is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.
  • One aspect of the present disclosure is useful for a wireless communication system.

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Abstract

L'invention concerne un terminal d'utilisateur, qui transmet sans fil des données de liaison montante (UL) à une station de base à l'aide d'un système d'accès multiple non orthogonal (NOMA), le terminal d'utilisateur comportant : une unité de codage qui code un train de bits des données de liaison montante ; une unité d'adaptation de débit qui est agencée dans un étage suivant de l'unité de codage et effectue une adaptation de débit sur le train de bits ; et un entrelaceur/embrouilleur qui est agencé dans un étage précédent de l'unité de codage et/ou entre l'unité de codage et l'unité d'adaptation de débit, et effectue un entrelacement et/ou un embrouillage sur le train de bits à l'aide d'une signature d'accès multiple (MA).
PCT/JP2018/014639 2018-04-05 2018-04-05 Terminal d'utilisateur et procédé de communication WO2019193728A1 (fr)

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