WO2019012593A1 - Terminal utilisateur et procédé de communication sans fil - Google Patents

Terminal utilisateur et procédé de communication sans fil Download PDF

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Publication number
WO2019012593A1
WO2019012593A1 PCT/JP2017/025185 JP2017025185W WO2019012593A1 WO 2019012593 A1 WO2019012593 A1 WO 2019012593A1 JP 2017025185 W JP2017025185 W JP 2017025185W WO 2019012593 A1 WO2019012593 A1 WO 2019012593A1
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Prior art keywords
section
signal
base station
user terminal
predetermined section
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PCT/JP2017/025185
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English (en)
Japanese (ja)
Inventor
英之 諸我
和晃 武田
聡 永田
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 CN201780093083.5A priority Critical patent/CN110870268A/zh
Priority to PCT/JP2017/025185 priority patent/WO2019012593A1/fr
Publication of WO2019012593A1 publication Critical patent/WO2019012593A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Definitions

  • the present invention relates to a user terminal and a wireless communication method in a next-generation mobile communication system.
  • LTE Long Term Evolution
  • FAA Future Radio Access
  • 5G 5th generation mobile communication system
  • 5G + 5G plus New-RAT (Radio Access Technology), etc.
  • OFDM Orthogonal Frequency Division Multiplexing
  • FFT window size 1 symbol
  • CP Cyclic Prefix
  • TTI Transmission Time Interval
  • next-generation mobile communication systems for example, 5G
  • multiple antenna elements for example, 100 or more elements
  • a high frequency band for example, 5 GHz or more
  • MIMO Massive Multiple Input Multiple Output
  • a single carrier transmission method with a small PAPR may be adopted as a downlink communication method.
  • the single carrier transmission method since the signal is mapped in the time domain, it is not necessary to fix the insertion interval of a section (hereinafter referred to as “predetermined section”) corresponding to the guard interval or the length of the predetermined section.
  • 3GPP TS 36.300 v 13.4.0 “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage 2 (Release 13),” June 2016 3GPP TS 36.211 v14.2.0, “Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and modulation (Release 14),” March 2017 3GPP TS 36.213 v14.2.0, “Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures (Release 14),” March 2017
  • An object of one aspect of the present invention is to provide a user terminal and a wireless communication method capable of effectively adding a predetermined section in a single carrier transmission scheme.
  • a user terminal removes a predetermined section from the downlink signal, and a receiving unit that is added with a predetermined section and receives a downlink signal transmitted from a wireless base station by a single carrier transmission scheme.
  • a predetermined interval removal unit, and a demodulation and decoding unit that demodulates and decodes the downlink control signal and the downlink data signal of the downlink signal from which the predetermined interval has been removed, and the downlink signal includes the predetermined
  • An addable section of a section is set, and an add pattern indicating the addable section to which the predetermined section is added is notified, and the predetermined section removing unit determines the addable section of the addable section indicated in the add pattern. The predetermined section is removed.
  • a wireless communication method receives a downlink signal transmitted from a wireless base station according to a single carrier transmission scheme, to which a predetermined interval is added, and removes the predetermined interval from the downlink signal;
  • An addition pattern indicating the addition possible section to which the predetermined section is added is notified, and the predetermined section of the addition possible section indicated in the addition pattern is removed.
  • a predetermined section can be effectively added in a single carrier transmission scheme.
  • the radio communication system includes at least the radio base station 10 shown in FIG. 1 and the user terminal 20 shown in FIG. The user terminal 20 is connected to the radio base station 10.
  • the radio base station 10 transmits a DL (Down Link) control signal to the user terminal 20 using a downlink control channel (for example, PDCCH: Physical Downlink Control Channel) in a single carrier transmission scheme, and a downlink data channel.
  • the DL data signal and the reference signal are transmitted using (for example, downlink shared channel: PDSCH: Physical Downlink Shared Channel).
  • the user terminal 20 transmits a UL (Up Link) control signal to the radio base station 10 using the uplink control channel (for example, PUCCH: Physical Uplink Control Channel) in the single carrier transmission scheme, and performs uplink.
  • a UL data signal and a reference signal are transmitted using a data channel (for example, PUSCH: Physical Uplink Shared Channel).
  • the downlink and uplink channels transmitted and received by the radio base station 10 and the user terminal 20 are not limited to the above PDCCH, PDSCH, PUCCH, PUSCH, etc.
  • PBCH Physical Broadcast Channel
  • RACH Random Access Channel It may be another channel such as.
  • the single carrier transmission method performed between the radio base station 10 and the user terminal 20 includes DFT-S-OFDM (Discrete Fourier Transform (DFT) -Spread-OFDM (Orthogonal Frequency Division Multiplexing)).
  • DFT-S-OFDM Discrete Fourier Transform (DFT) -Spread-OFDM (Orthogonal Frequency Division Multiplexing)
  • FIG. 1 is a diagram showing an example of the entire configuration of the radio base station 10 according to the present embodiment.
  • the radio base station 10 illustrated in FIG. 1 receives the scheduler 101, the transmission signal generation unit 102, the coding / modulation unit 103, the mapping unit 104, the CP addition unit 105, the transmission unit 106, the antenna 107, and A configuration including unit 108, CP removing unit 109, control unit 110, channel estimation unit 111, and demodulation / decoding unit 112 is employed.
  • the scheduler 101 performs scheduling (for example, resource allocation, antenna port allocation) of DL signals (DL data signal, DL control signal, reference signal, etc.).
  • the scheduler 101 also performs scheduling (for example, resource allocation, antenna port allocation) of UL signals (UL data signal, UL control signal, reference signal, etc.).
  • the scheduler 101 outputs scheduling information indicating a scheduling result to the transmission signal generation unit 102, the mapping unit 104, and the control unit 110.
  • the scheduler 101 for example, MCS (coding rate, modulation scheme, etc.) of the DL data signal and the UL data signal for each user terminal 20 based on the channel quality between the radio base station 10 and the user terminal 20.
  • MCS coding rate, modulation scheme, etc.
  • MCS is not limited when the wireless base station 10 sets, and the user terminal 20 may set it.
  • the radio base station 10 may receive MCS information from the user terminal 20 (not shown).
  • the transmission signal generation unit 102 generates a transmission signal (including a DL data signal and a DL control signal) for each user terminal 20.
  • the DL control signal includes downlink control information (DCI: Downlink Control Information) including scheduling information (for example, resource allocation information of DL data signal) output from the scheduler 101 or MCS information.
  • DCI Downlink Control Information
  • the transmission signal generation unit 102 outputs the generated transmission signal to the coding / modulation unit 103.
  • the encoding / modulation unit 103 performs encoding processing and modulation processing on the transmission signal input from the transmission signal generation unit 102 based on, for example, the MCS information input from the scheduler 101. Encoding / modulation section 103 outputs the modulated transmission signal to mapping section 104.
  • the mapping unit 104 maps the transmission signal input from the encoding / modulation unit 103 in the time domain based on scheduling information (for example, DL resource allocation and / or port allocation) input from the scheduler 101. Also, the mapping unit 104 maps the reference signal in the time domain based on the scheduling information. Also, mapping section 104 maps DL signals addressed to a plurality of user terminals 20 so as to be time division multiplexed. Mapping section 104 outputs the mapped DL signal to CP addition section 105.
  • scheduling information for example, DL resource allocation and / or port allocation
  • CP adding section 105 adds a CP (Cyclic Prefix) to the DL signal input from mapping section 104 and outputs the result to transmitting section 106.
  • CP Cyclic Prefix
  • the transmission unit 106 performs transmission processing such as up-conversion and amplification on the DL signal input from the CP addition unit 105, and transmits a radio frequency signal (DL signal) from the antenna 107.
  • the receiving unit 108 performs reception processing such as amplification and down conversion on the radio frequency signal (UL signal) received by the antenna 107, and outputs the UL signal to the CP removing unit 109.
  • CP removing section 109 removes the CP from the UL signal input from receiving section 108 and outputs the result to control section 110.
  • the control unit 110 separates (demaps) the UL data signal and the reference signal from the UL signal input from the CP removal unit 109 based on the scheduling information (UL resource allocation and / or port allocation) input from the scheduler 101. ). Then, control section 110 outputs the UL data signal to channel estimation section 111.
  • Channel estimation section 111 performs channel estimation using the reference signal, and outputs a channel estimation value that is the estimation result to demodulation and decoding section 112.
  • Demodulation / decoding section 112 performs demodulation and decoding processing on the UL data signal input from control section 110 based on the channel estimation value input from channel estimation section 111.
  • the demodulation / decoding unit 112 transfers the UL data signal after demodulation to an application unit (not shown).
  • the application unit performs processing on a layer higher than the physical layer or the MAC layer.
  • FIG. 2 is a diagram showing an example of the entire configuration of the user terminal 20 according to the present embodiment.
  • the user terminal 20 shown in FIG. 2 includes an antenna 201, a receiving unit 202, a CP removing unit 203, a control unit 204, a channel estimation unit 205, a demodulation / decoding unit 206, a transmission signal generation unit 207, and a code.
  • a configuration including a modulation / modulation unit 208, a mapping unit 209, a CP addition unit 210, and a transmission unit 211 is employed. Then, the user terminal 20 performs reception processing of the radio frequency signal received by the antenna port assigned to the user terminal 20 itself.
  • the reception unit 202 performs reception processing such as amplification and down conversion on the radio frequency signal (DL signal) received by the antenna 201, and outputs the DL signal to the CP removal unit 203.
  • the DL signal includes at least a DL data signal, a DL control signal, and a reference signal.
  • CP removing section 203 removes the CP from the DL signal input from receiving section 202 and outputs the result to control section 204.
  • the control unit 204 separates (demaps) the DL control signal and the reference signal from the DL signal input from the CP removal unit 203. Then, the control unit 204 outputs the DL control signal to the demodulation / decoding unit 206 and outputs the reference signal to the channel estimation unit 205.
  • control unit 204 separates (demaps) the DL data signal from the DL signal based on the scheduling information (for example, DL resource allocation information) input from the demodulation / decoding unit 206, and demodulates the DL data signal. Output to the decryption unit 206.
  • scheduling information for example, DL resource allocation information
  • Channel estimation section 205 performs channel estimation using the separated reference signal, and outputs a channel estimation value that is the estimation result to demodulation and decoding section 206.
  • the demodulation / decoding unit 206 demodulates the DL control signal input from the control unit 204. Further, the demodulation / decoding unit 206 performs a decoding process (for example, a blind detection process) on the DL control signal after demodulation. Demodulation / decoding section 206 outputs scheduling information (resource allocation of DL / UL, mapping setting of reference signal, etc.) for own apparatus obtained by decoding the DL control signal to control section 204 and mapping section 209. , And outputs MCS information for the UL data signal to the encoding / modulation unit 208.
  • a decoding process for example, a blind detection process
  • the demodulation / decoding unit 206 is configured to generate a DL data signal input from the control unit 204 based on the channel estimation value input from the control unit 204 and MCS information for the DL data signal included in the DL control signal. Then, demodulation and decoding processing is performed. Further, the demodulation / decoding unit 206 transfers the demodulated DL data signal to an application unit (not shown). The application unit performs processing on a layer higher than the physical layer or the MAC layer.
  • the transmission signal generation unit 207 generates a transmission signal (including a UL data signal or a UL control signal), and outputs the generated transmission signal to the coding / modulation unit 208.
  • the encoding / modulation unit 208 performs encoding processing and modulation processing on the transmission signal input from the transmission signal generation unit 207 based on, for example, the MCS information input from the demodulation / decoding unit 206.
  • the coding / modulation unit 208 outputs the modulated transmission signal to the mapping unit 209.
  • the mapping unit 209 maps the transmission signal input from the encoding / modulation unit 208 in the time domain based on the scheduling information (UL resource allocation) input from the demodulation / decoding unit 206. Also, the mapping unit 209 maps the reference signal in the time domain based on the scheduling information. Mapping section 209 outputs the mapped UL signal to CP addition section 210.
  • CP adding section 210 adds a CP (Cyclic Prefix) to the UL signal input from mapping section 209 and outputs the result to transmitting section 211.
  • the transmission unit 211 performs transmission processing such as up-conversion and amplification on the UL signal (including at least the UL data signal and the reference signal) input from the CP addition unit 210, and transmits the radio frequency signal (UL signal) to the antenna Send from 201
  • FIG. 3 to FIG. 6 the horizontal axis indicates the time axis.
  • an arrow A1 in the transmission signal shown in FIGS. 3 to 6 indicates a transmission point at which the DL signal is transmitted by a single carrier.
  • the transmission point indicated by the arrow A1 may be referred to as a sample point.
  • the spacing of the sample points is, for example, "1 / system bandwidth”.
  • the transmission point indicated by the arrow A1 may be called a subcarrier, a tone, a resource element, a component, a symbol, a mini symbol, or a sample. That is, the transmission point indicated by the arrow A1 is not limited to the name of the sample point. Also, the names are not limited to the names listed above.
  • FIG. 3 is a diagram showing a first example of the CP addition process of the present embodiment.
  • the radio base station 10 time-division multiplexes transmission signals (DL signals) for a plurality of user terminals 20 (users # 0, # 1, # 2,...) In a time domain.
  • the length (data size) of the transmission signal addressed to each user terminal 20 changes according to the amount of data.
  • Transmission signals include physical control channels and physical data channels. The data size is previously notified from the radio base station 10 to each user terminal 20.
  • the radio base station 10 adds a CP to the transmission signal for each user terminal 20.
  • FIG. 3 shows the case where the length of each CP is constant, the present embodiment is not limited to this, and the length of the CP may be different for each user terminal 20.
  • the length of the CP is known to the radio base station 10 and the user terminal 20.
  • Each user terminal 20 upon receiving the DL signal transmitted from the radio base station 10, removes the CP and performs demodulation processing and decoding processing. Each user terminal 20 performs monitoring (blind decoding) in the search space for the physical control channel.
  • the transmission signals to the respective user terminals 20 are transmitted. Add CP every time.
  • each user terminal 20 can perform reception processing (demodulation processing and decoding processing) without waiting for a signal addressed to another user terminal 20, so the delay time due to reception processing can be shortened.
  • reception processing demodulation processing and decoding processing
  • the first example can also be applied to UL communication.
  • FIG. 4 is a diagram showing a second example of the CP addition process of the present embodiment.
  • the radio base station 10 time-division multiplexes transmission signals (DL signals) for a plurality of user terminals 20 (users # 0, # 1, # 2,...) In a time domain.
  • the length of the transmission signal addressed to each user terminal 20 changes in accordance with the amount of data.
  • Transmission signals include physical control channels and physical data channels.
  • Each user terminal 20 receives a notification of the number n of users from the radio base station 10, and then receives a DL signal addressed to the n user terminals 20 transmitted from the radio base station 10, and then removes the CP. It performs demodulation processing and decoding processing.
  • the wireless base station 10 is addressed to n user terminals 20.
  • CP is added to each transmission signal.
  • the amount of CP can be reduced as compared to the case of adding a CP for each user terminal 20, so overhead can be reduced.
  • the number n of users notified in the physical control channel may be limited to 2 m (m is a natural number), and the number n of users may be notified with an information amount of m bits.
  • FIG. 5 is a diagram showing a third example of the CP addition process of the present embodiment.
  • CP addition enabled sections T1 to T4 are prepared.
  • the lengths and intervals of the sections T1 to T4 are known to the radio base station 10 and the user terminal 20.
  • the sections T1 to T4 have the same length (time) and are set at equal intervals in FIG. 5, the intervals T1 to T4 do not have to be equal intervals.
  • the radio base station 10 determines whether to add a CP or to map a DL signal (physical control channel or physical data channel) without adding a CP in each of the sections T1 to T4. In FIG. 5, the radio base station 10 adds a CP in the sections T1, T2 and T4, and does not add a CP in the section T3. Note that CP addition / non-addition is based on the average received power (RSRP), average received quality (RSRQ), channel quality (CQI) reported from the user, or the channel estimation value estimated at the radio base station 10, etc. It is determined.
  • RSRP average received power
  • RSRQ average received quality
  • CQI channel quality
  • the radio base station 10 notifies the user terminal 20 of a CP addition pattern indicating CP addition / non-addition (number of a section to which CP is added) in each section.
  • the radio base station 10 may notify the CP addition pattern explicitly or may notify it implicitly.
  • the radio base station 10 may notify the CP addition pattern using DCI (Downlink Control Information) of the physical control channel. Also, the radio base station 10 may notify the CP addition pattern by higher layer signaling such as RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling and the like. Also, the radio base station 10 may notify the CP addition pattern using broadcast information such as a master information block (MIB) or a system information block (SIB).
  • MIB master information block
  • SIB system information block
  • the radio base station 10 and the user terminal 20 have, for example, one pair of a synchronization signal (SS), a configuration of PBCH, SIB or RACH, etc. and a CP addition pattern. You may associate by 1. As a result, since the CP addition pattern is notified to the implicit by the existing signal, new signaling for notifying the CP addition pattern becomes unnecessary, and overhead can be reduced.
  • SS synchronization signal
  • the user terminal 20 specifies the sections T1, T2 and T4 to which the CP is added based on the notified CP addition pattern, removes the CP added to these sections, and performs demodulation processing and decoding processing. At this time, the user terminal 20 performs demodulation processing and decoding processing on the DL signal (physical control channel or physical data channel) mapped in the section T3. In addition, when the CP addition pattern is notified by DCI of the physical control channel, the same CP addition pattern is maintained until the next CP addition pattern is notified.
  • the wireless base station 10 when transmitting a signal by the single carrier transmission scheme, the wireless base station 10 selects the number of the section to which the CP is added in the prepared CP applicable section. The user terminal 20 is notified of the CP addition pattern shown.
  • the radio base station 10 adds a CP in a limited section, which facilitates processing. Also, the radio base station 10 can flexibly and easily change the amount of CP addition by controlling CP addition / non-addition in each section in which CP can be added. Further, since the radio base station 10 only needs to notify the user terminal 20 of the CP addition pattern, the amount of information for notifying CP addition / non-addition can be reduced.
  • the third example can also be applied to UL communication in the case of one user (when the radio base station 10 communicates with one user terminal 20).
  • FIG. 6 is a diagram showing a fourth example of the CP addition process of the present embodiment.
  • CP addition enabled sections T1 to T4 are prepared.
  • sections T1 to T4 have the same length (time) and are set at equal intervals.
  • Each of the sections T1 to T4 is composed of two consecutive partial sections of the same length.
  • the section T1 consists of two partial sections T11 and T12.
  • the lengths of the sections T1 to T4, the number of partial sections, and the intervals are known to the radio base station 10 and the user terminal 20.
  • the radio base station 10 determines whether to add a CP or to map a DL signal (physical control channel or physical data channel) without adding a CP in each partial section of the sections T1 to T4. .
  • the radio base station 10 adds a CP in the partial sections T11, T12, T21 and T41, and does not add a CP in the partial sections T22, T31, T32 and T42.
  • the radio base station 10 notifies each user terminal 20 of a CP addition pattern indicating CP addition / non-addition in each partial section.
  • the CP addition pattern is maintained until the transmission timing of the next physical control channel.
  • the radio base station 10 may notify the CP addition pattern explicitly or may notify the CP addition pattern implicitly.
  • the user terminal 20 specifies partial sections T11, T12, T21 and T41 to which CP is added based on the notified information indicating CP addition / non-addition, removes the CP added to these sections, and demodulates Perform processing and decryption processing.
  • the radio base station 10 when transmitting a signal by the single carrier transmission method, uses the information indicating CP addition / non-addition in each partial section to which CP can be added as a user.
  • the terminal 20 is notified.
  • the radio base station 10 adds a CP in a limited section, which facilitates processing.
  • each section to which CP can be added is divided into a plurality of partial sections, and radio base station 10 changes the CP addition amount more flexibly by controlling CP addition / non-addition in each partial section. And can be adapted to environments with large delay spreads.
  • the fourth example can also be applied to UL communication in the case of one user (when the radio base station 10 communicates with one user terminal 20).
  • the timing of adding a CP and the amount of CP are adaptively controlled in the single carrier transmission method. Thereby, CP can be effectively added in the single carrier transmission system.
  • the radio base station 10 adds a CP for each transmission signal addressed to each user terminal 20 when time-division multiplexing and transmitting signals addressed to a plurality of user terminals 20 .
  • each user terminal 20 can perform reception processing (demodulation processing and decoding processing) without waiting for a signal addressed to another user terminal 20, so the delay time due to reception processing can be shortened.
  • reception processing demodulation processing and decoding processing
  • the wireless base station 10 when time-division multiplexing and transmitting signals addressed to a plurality of user terminals 20, the wireless base station 10 transmits a CP for each of the n transmitted signals addressed to the user terminals 20. Add As a result, the amount of CP can be reduced as compared to the case of adding a CP for each user terminal 20, so overhead can be reduced.
  • the radio base station 10 notifies the user terminal 20 of a CP addition pattern indicating the number of the section to which a CP is added among the prepared CP addition enabled sections.
  • the radio base station 10 adds a CP in a limited section, which facilitates processing.
  • the radio base station 10 can flexibly and easily change the amount of CP addition by controlling CP addition / non-addition in each section in which CP can be added. Further, since the radio base station 10 only needs to notify the user terminal 20 of the CP addition pattern, the amount of information for notifying CP addition / non-addition can be reduced.
  • the radio base station 10 notifies the user terminal 20 of information indicating CP addition / non-addition in each partial section to which CP can be added.
  • the radio base station 10 adds a CP in a limited section, which facilitates processing.
  • each section to which CP can be added is divided into a plurality of partial sections, and radio base station 10 changes the CP addition amount more flexibly by controlling CP addition / non-addition in each partial section. And can be adapted to environments with large delay spreads.
  • a CP may be added to the transmission signal obtained by putting together the physical control channel and the physical data channel. Thereby, the data amount of the physical control channel and the physical data channel in the section divided by CP can be adaptively controlled.
  • the example of FIG. 7 is applicable to DL communication and UL communication.
  • the CP may be generated by copying the signal (S801 in FIG. 8) in the section immediately before the next CP, or the signal in another section (S802 in FIG. 8) may be copied May be generated.
  • the section of the signal serving as the copy source of the CP may be defined as a specification and be known to the radio base station 10 and the user terminal 20, or the radio base station 10 may transmit the DCI of the physical control channel to the user terminal 20, upper layer signaling Alternatively, notification may be made by using broadcast information such as MIB or SIB.
  • the radio base station 10 may notify the user terminal 20 of the CP transmission interval by DCI of the physical control channel.
  • the CP transmission interval is maintained until the next physical control channel transmission timing.
  • the CP addition pattern can be dynamically changed.
  • the radio base station 10 and the user terminal 20 store a pattern table in which the transmission intervals of a plurality of settable CPs are associated with the index, and the CP set by the radio base station 10 The index indicative of the transmission interval of may be notified to the user terminal 20.
  • the user terminal 20 (CP removing unit 203) specifies a CP transmission interval based on the index notified from the wireless base station 10. Thereby, the amount of information for notifying the CP transmission interval can be reduced.
  • the radio base station 10 may notify the user terminal 20 of the CP addition pattern by higher layer signaling.
  • the CP addition pattern is quasi-statically changed.
  • a case where CP is not added may be included. In this case, the amount of information to be notified by the DCI of the physical control channel can be reduced.
  • the user terminal 20 needs to know information such as CP length, CP added section, CP copy source, UL and DL scheduling information, modulation scheme, data size, etc. in order to perform reception processing.
  • information such as CP length, CP added section, CP copy source, UL and DL scheduling information, modulation scheme, data size, etc.
  • the radio base station 10 can use these information as a common DCI in the physical control channel (see FIG. It may be transmitted in step S1001).
  • the radio base station 10 since the UL and DL scheduling information, modulation scheme, and data size are information unique to each user terminal 20, the radio base station 10 processes the above information in each of the user terminals 20 in the physical control channel. It is necessary to transmit in DCI (S1002 in FIG. 10).
  • the radio base station 10 may be determined in association with other information. For example, if the CP length is linked to average received power (RSRP), average received quality (RSRQ), channel quality (CQI), etc. and these values are equal to or greater than a predetermined threshold, it is better than in the case of less than the threshold.
  • the CP length may be shortened. Further, for example, the CP length may be made longer than that in the case of being smaller than the threshold value when these values are equal to or greater than a predetermined threshold value by linking to MCS, modulation multi-value number, stream number, and the like.
  • the user terminal 20 can uniquely identify the CP length by knowing the information linked to the CP length, so the radio base station 10 does not need to notify the information indicating the CP length, and the information The amount can be reduced.
  • the CP is used as the predetermined section.
  • the present invention is not limited to this, and zero padding, a known sequence (Unique Word), or the like may be used as the predetermined section.
  • the predetermined section may be called a guard interval, a guard time, or a guard period.
  • the length of the predetermined section may be "0". That is, in the present invention, at the timing of the division to which the predetermined section is added, the end of the signal immediately before the division and the tip of the immediately following signal may be continuous.
  • each functional block may be realized by one physically and / or logically coupled device, or directly and / or indirectly two or more physically and / or logically separated devices. It may be connected by (for example, wired and / or wireless) and realized by the plurality of devices.
  • a wireless base station, a user terminal, and the like in one embodiment of the present invention may function as a computer that performs the processing of the wireless communication method of the present invention.
  • FIG. 11 is a diagram showing an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
  • the above-described wireless base station 10 and user terminal 20 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. Good.
  • the term “device” can be read as a circuit, a device, a unit, or the like.
  • the hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include one or more of the devices illustrated in the figure, or may be configured without including some devices.
  • processor 1001 may be implemented by one or more chips.
  • Each function in the radio base station 10 and the user terminal 20 performs a calculation by causing the processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and performs communication by the communication device 1004 or This is realized by controlling reading and / or writing of data in the memory 1002 and the storage 1003.
  • the processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU: Central Processing Unit) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like.
  • CPU Central Processing Unit
  • the channel estimation units 111 and 205, the demodulation and decoding units 112 and 206, and the like may be realized by the processor 1001.
  • the processor 1001 reads a program (program code), a software module or data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these.
  • a program a program that causes a computer to execute at least a part of the operations described in the above embodiments is used.
  • the scheduler 101 of the radio base station 10 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, or may be realized similarly for other functional blocks.
  • the various processes described above have been described to be executed by one processor 1001, but may be executed simultaneously or sequentially by two or more processors 1001.
  • the processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the memory 1002 is a computer readable recording medium, and includes, for example, at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a RAM (Random Access Memory). It may be done.
  • 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 invention.
  • the storage 1003 is a computer readable recording medium, and for example, 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 A (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, a key drive), a floppy (registered trademark) disk, a magnetic strip, and the like may be used.
  • the storage 1003 may be called an auxiliary storage device.
  • the above-mentioned storage medium may be, for example, a database including the memory 1002 and / or the storage 1003, a server or any other suitable medium.
  • the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like.
  • a network device for example, a network controller, a network card, a communication module, or the like.
  • the above-described transmission units 106 and 211, antennas 107 and 201, and reception units 108 and 202 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, and the like) that receives 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 be integrated (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 by a single bus or may be configured by different buses among the devices.
  • radio base station 10 and the user terminal 20 may be microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), etc. It may be configured to include hardware, and part or all of each functional block may be realized by the hardware. For example, processor 1001 may be implemented in at least one of these hardware.
  • DSPs digital signal processors
  • ASICs application specific integrated circuits
  • PLDs programmable logic devices
  • FPGAs field programmable gate arrays
  • notification of information is not limited to the aspect / embodiment described herein, and may be performed by other methods.
  • notification of information may be physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI)), upper layer signaling (for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) 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 (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.
  • Each aspect / embodiment described in the present specification is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-Wide Band),
  • the present invention may be applied to a system utilizing Bluetooth (registered trademark), other appropriate systems, and / or an advanced next-generation system based on these.
  • the specific operation supposed to be performed by the base station (radio base station) in this specification may be performed by the upper node in some cases.
  • the various operations performed for communication with the terminals may be the base station and / or other network nodes other than the base station (eg, It is obvious that this may be performed by, but not limited to, MME (Mobility Management Entity) or S-GW (Serving Gateway).
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • Information, signals, etc. may be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input and output may be performed via a plurality of network nodes.
  • the input / output information or the like may be stored in a specific place (for example, a memory) or may be managed by a management table. Information to be input or output may be overwritten, updated or added. The output information etc. may be deleted. The input information or the like may be transmitted to another device.
  • the determination may be performed by a value (0 or 1) represented by one bit, may be performed by a boolean value (Boolean: true or false), or may be compared with a numerical value (for example, a predetermined value). Comparison with the value).
  • Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.
  • software, instructions, etc. may be sent and received via a transmission medium.
  • software may use a wireline technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a website, server or other using wireless technology such as infrared, radio and microwave When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission medium.
  • wireline technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or a website, server or other using wireless technology such as infrared, radio and microwave
  • Information, signal The information, signals, etc. described herein may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips etc may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of
  • the channels and / or symbols may be signals.
  • the signal may be a message.
  • the component carrier (CC) may be called a carrier frequency, a cell or the like.
  • radio resources may be indexed.
  • a base station can accommodate one or more (e.g., three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small base station RRH for indoor use: Remote Communication service can also be provided by Radio Head.
  • the terms "cell” or “sector” refer to a part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage.
  • base station “eNB”, “cell” and “sector” may be used interchangeably herein.
  • a base station may be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), femtocell, small cell, and the like.
  • the user terminal may be a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote communication device, a mobile subscriber station, an access terminal, a mobile terminal by a person skilled in the art It may also be called a terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, a UE (User Equipment), or some other suitable term.
  • determining may encompass a wide variety of operations.
  • “Judgment”, “decision” are, for example, judging, calculating, calculating, processing, processing, deriving, investigating, looking up (for example, a table) (Searching in a database or another data structure), ascertaining may be regarded as “decision”, “decision”, etc.
  • “determination” and “determination” are receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (accessing) (for example, accessing data in a memory) may be regarded as “judged” or “decided”.
  • connection means any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled”.
  • the coupling or connection between elements may be physical, logical or a combination thereof.
  • the two elements are by using one or more wires, cables and / or printed electrical connections, and radio frequency as some non-limiting and non-exclusive examples. It can be considered “connected” or “coupled” to one another by using electromagnetic energy such as electromagnetic energy having wavelengths in the region, microwave region and light (both visible and invisible) regions.
  • the reference signal may be abbreviated as RS (Reference Signal), and may be called a pilot (Pilot) according to the applied standard.
  • RS Reference Signal
  • Pilot pilot
  • the phrase “based on” does not mean “based only on,” unless expressly stated otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
  • a radio frame may be comprised of one or more frames in the time domain.
  • One or more frames in the time domain may be referred to as subframes, time units, and so on.
  • a subframe may be further comprised of one or more slots in the time domain.
  • the slot may be further configured with one or more symbols (such as orthogonal frequency division multiplexing (OFDM) symbols, single carrier-frequency division multiple access (SC-FDMA) symbols, etc.) in the time domain.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDMA single carrier-frequency division multiple access
  • a radio frame, a subframe, a slot, a minislot, and a symbol all represent time units when transmitting a signal.
  • a radio frame, a subframe, a slot, a minislot, and a symbol may be another name corresponding to each.
  • the base station performs scheduling to assign radio resources (frequency bandwidth usable in each mobile station, transmission power, etc.) to each mobile station.
  • the minimum time unit of scheduling may be called a 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
  • one minislot may be called a TTI
  • a resource unit is a resource allocation unit in time domain and frequency domain, and may include one or more consecutive subcarriers in frequency domain.
  • the time domain of the resource unit may include one or more symbols, and may be one slot, one minislot, one subframe, or one TTI long.
  • One TTI and one subframe may be configured of one or more resource units, respectively.
  • resource units may be referred to as resource blocks (RBs), physical resource blocks (PRBs: physical RBs), PRB pairs, RB pairs, scheduling units, frequency units, and subbands.
  • a resource unit may be configured of one or more REs.
  • 1 RE may be a resource of a unit smaller than the resource unit serving as a resource allocation unit (for example, the smallest resource unit), and is not limited to the name of RE.
  • the above-described radio frame structure 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 minislots included in the subframe, and the symbols and resource blocks included in the slots.
  • the number and the number of subcarriers included in the resource block can be variously changed.
  • notification of predetermined information is not limited to what is explicitly performed, but is performed by implicit (for example, not notifying of the predetermined information) It is also good.
  • One aspect of the present invention is useful for a mobile communication system.

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

Abstract

La présente invention concerne un terminal utilisateur qui doit être utilisé dans un futur système de communication sans fil qui met en œuvre un système de transmission à porteuse unique. Ledit terminal utilisateur (20) reçoit un signal de liaison descendante transmis à partir d'une station de base sans fil (10) à l'aide d'un système de transmission à porteuse unique. Des intervalles pouvant être ajoutés de préfixe cyclique (CP) sont définis dans le signal de liaison descendante. Des CP sont ajoutés dans les intervalles pouvant être ajoutés. Le terminal utilisateur (20) est notifié d'un modèle d'addition de CP indiquant les intervalles pouvant être ajoutés dans lesquels des CP ont été ajoutés. Une unité d'élimination de CP (203) élimine des CP dans les intervalles pouvant être ajoutés indiqués dans le modèle d'addition de CP.
PCT/JP2017/025185 2017-07-10 2017-07-10 Terminal utilisateur et procédé de communication sans fil WO2019012593A1 (fr)

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CN201780093083.5A CN110870268A (zh) 2017-07-10 2017-07-10 用户终端以及无线通信方法
PCT/JP2017/025185 WO2019012593A1 (fr) 2017-07-10 2017-07-10 Terminal utilisateur et procédé de communication sans fil

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Citations (2)

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JPH09135230A (ja) * 1995-09-06 1997-05-20 Jisedai Digital Television Hoso Syst Kenkyusho:Kk 直交周波数分割多重伝送方式及びそれを用いる送信装置と受信装置
WO2007148796A1 (fr) * 2006-06-23 2007-12-27 Panasonic Corporation Émetteur radio, récepteur radio, et procédé de génération de pilotes

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CN101090291A (zh) * 2006-06-14 2007-12-19 中兴通讯股份有限公司 一种抑制td－scdma下行导频对上行导频干扰的方法
JP2009290725A (ja) * 2008-05-30 2009-12-10 Fujitsu Ltd 受信装置および受信方法
US9042469B2 (en) * 2013-07-08 2015-05-26 National Chiao Tung University Receiver and receiving method for a combinerless LINC OFDM system
JP6019005B2 (ja) * 2013-10-31 2016-11-02 株式会社Ｎｔｔドコモ 無線基地局、ユーザ端末及び無線通信方法
CN105471791A (zh) * 2014-09-05 2016-04-06 中兴通讯股份有限公司 循环前缀类型的配置方法及装置

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JPH09135230A (ja) * 1995-09-06 1997-05-20 Jisedai Digital Television Hoso Syst Kenkyusho:Kk 直交周波数分割多重伝送方式及びそれを用いる送信装置と受信装置
WO2007148796A1 (fr) * 2006-06-23 2007-12-27 Panasonic Corporation Émetteur radio, récepteur radio, et procédé de génération de pilotes

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