WO2018137574A1 - 一种发送载波信息的方法、基站及终端 - Google Patents
一种发送载波信息的方法、基站及终端 Download PDFInfo
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- WO2018137574A1 WO2018137574A1 PCT/CN2018/073489 CN2018073489W WO2018137574A1 WO 2018137574 A1 WO2018137574 A1 WO 2018137574A1 CN 2018073489 W CN2018073489 W CN 2018073489W WO 2018137574 A1 WO2018137574 A1 WO 2018137574A1
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- subcarrier
- carrier
- raster
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03821—Inter-carrier interference cancellation [ICI]
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- 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
Definitions
- the embodiments of the present application relate to the field of communications, and in particular, to a method and a base station for transmitting carrier information, a method for determining a subcarrier, and a terminal.
- Next-generation communication technologies such as 5G, require low frequency carriers to provide better coverage and mobility requirements.
- Existing frequency bands below 6 GHz have been allocated to existing communication systems, such as long term evolution (LTE) systems.
- LTE long term evolution
- 5G's new radio (NR) technology uses two carriers in the frequency band below 6 GHz.
- One is frequency band re-division and redistribution band is used for NR.
- Band re-division is a complicated and long-term process. Considering the adjacent-frequency deployment problem of NR and LTE, it will affect the actual deployment and commercial time of the NR; another possible way is to share the carrier between NR and LTE.
- the NR can be deployed and commercialized as early as possible while ensuring the coverage and mobility requirements of the NR.
- subcarrier mapping modes of NR and LTE are likely to be different, subcarrier interference occurs when NR and LTE share carriers, which seriously affects the performance of NR and LTE.
- the embodiment of the present application provides a method for transmitting carrier information, so as to avoid subcarrier interference problems that may occur when different subcarrier mapping modes exist.
- the embodiment of the present application provides a method for transmitting carrier information, including: performing, by a base station, subcarrier mapping on a first carrier according to a first subcarrier mapping manner, where the first subcarrier mapping manner corresponds to a subcarrier.
- the subcarrier corresponding to the second subcarrier mapping manner has a frequency offset of a first offset value, and the subcarrier corresponding to the second subcarrier mapping manner is symmetric with respect to a carrier center frequency of the first carrier There is no subcarrier on the carrier center frequency of the first carrier; the base station sends indication information to the terminal, where the indication information carries information of the first offset value.
- the base station may perform subcarrier mapping according to the first subcarrier mapping manner on the shared carrier, thereby reducing on the base station side. Or eliminate subcarrier interference caused by the simultaneous existence of different subcarrier mapping modes.
- the base station adjusts the subcarrier mapping mode of the NR in the shared carrier, so that the subcarrier mapping mode of the NR is mapped according to the LTE subcarrier mapping manner, thereby avoiding NR and LTE in the shared carrier.
- Inter-subcarrier interference The base station can send the indication information to the terminal, so that the terminal can acquire the actual mapped frequency position of the subcarrier of the NR, so that the terminal can perform more accurate frequency synchronization, and avoid sampling caused by different subcarrier mapping frequency values determined by the terminal and the base station.
- a transmission failure condition caused by a frequency failure occurs.
- the indication information further includes an evolved universal land surface wireless access absolute radio channel number EARFCN of the first carrier.
- the indication information may be carried in a system message or an RRC signaling.
- the information of the first offset value includes a first value or a second value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz, or the second value indicates the first offset value It is -7.5KHz.
- the indication information further carries information of the second offset value.
- the second offset value indicated by the information of the second offset value satisfies the formula X-floor(X/Raster+0.5)*Raster, or satisfies the formula X-floor(X/Raster)*Raster.
- X is an integer multiple of 100KHz, and X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster, and Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is any one of +(Raster2-Raster1), -(Raster2-Raster1), +Raster1, or -Raster1.
- the Raster1 is the value of the first channel raster
- the Raster2 is the value of the second channel raster
- the first channel raster is the channel grid used by the communication mode corresponding to the first subcarrier mapping mode.
- the second channel grid is a channel grid used by the communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is a set of values ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, 50, -60, 60, - Any of the elements 70, 70, -80, 80, -90, 90 ⁇ .
- the first offset value indicated by the information of the first offset value satisfies any one of the following formulas: X-floor(X/Raster+0.5)*Raster+7.5KHz, X -floor(X/Raster+0.5)*Raster-7.5KHz, X-floor(X/Raster)*Raster+7.5KHz, or X-floor(X/Raster)*Raster-7.5KHz.
- floor() represents rounding down
- X is an integer multiple of 100KHz
- X ranges from 0 to (Y-100) KHz
- Y is a common multiple of 100KHz and Raster
- Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the information of the first offset value includes any one of a first value to an eleventh value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz; and the third value indicates that the first offset value is -7.5 KHz;
- the fourth value indicates that the first offset value is +(Raster2-Raster1)+7.5KHz;
- the fifth value indicates that the first offset value is +(Raster2-Raster1)-7.5KHz;
- the sixth value indicates the first The offset value is -(Raster2-Raster1)+7.5KHz;
- the seventh value indicates that the first offset value is -(Raster2-Raster1)-7.5KHz;
- the eighth value indicates that the first offset value is +Raster1 +7.5KHz;
- the ninth value indicates that the first offset value is +Raster1 - 7.5KHz;
- the tenth value indicates that the first offset value is -Raster1 + 7.5KHz;
- the first carrier is a downlink carrier shared by the first communication mode and the second communication mode.
- the subcarrier mapping mode of the first communication mode is the first subcarrier mapping mode
- the subcarrier mapping mode of the second communication mode is the second subcarrier mapping mode.
- the embodiment of the present application provides a method for determining a subcarrier, where the terminal receives the indication information from the base station, where the indication information carries information of a first offset value, where the first offset value is The frequency of the subcarrier corresponding to the first subcarrier mapping mode is relative to the frequency of the subcarrier corresponding to the second subcarrier mapping mode, and the subcarrier corresponding to the second subcarrier mapping mode is symmetric with respect to the carrier center frequency of the first carrier.
- the carrier has no subcarriers on the carrier center frequency of the first carrier; the terminal determines one of the first carriers according to the indication information, the second subcarrier mapping manner, and the carrier center frequency of the first carrier. Or the frequency position of multiple subcarriers.
- the terminal can obtain the frequency position of the actual mapping of the subcarrier corresponding to the second subcarrier mapping manner by receiving the indication information. Further, more accurate frequency synchronization can be performed, and the occurrence of a transmission failure caused by the failure of the sampling frequency due to the difference in the subcarrier mapping frequency values determined by the terminal and the base station can be avoided.
- the first subcarrier mapping mode is a subcarrier mapping mode of LTE
- the second subcarrier mapping mode is a subcarrier mapping mode of NR.
- the indication information further includes an evolved universal land surface radio access absolute radio channel number EARFCN of the first carrier, and the terminal may obtain a carrier center frequency of the first carrier according to the EARFCN.
- EARFCN evolved universal land surface radio access absolute radio channel number
- the terminal may obtain the indication information by receiving a system message or RRC signaling.
- the information of the first offset value includes a first value or a second value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz, or the second value indicates the first offset value It is -7.5KHz.
- the indication information further carries information of the second offset value.
- the second offset value indicated by the information of the second offset value satisfies the formula X-floor(X/Raster+0.5)*Raster, or satisfies the formula X-floor(X/Raster)*Raster.
- X is an integer multiple of 100KHz, and X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster, and Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is any one of +(Raster2-Raster1), -(Raster2-Raster1), +Raster1, or -Raster1.
- the Raster1 is the value of the first channel raster
- the Raster2 is the value of the second channel raster
- the first channel raster is the channel grid used by the communication mode corresponding to the first subcarrier mapping mode.
- the second channel grid is a channel grid used by the communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is a set of values ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, 50, -60, 60, - Any of the elements 70, 70, -80, 80, -90, 90 ⁇ .
- the terminal obtains a carrier center frequency of the first carrier according to the second offset value and the first frequency.
- the carrier center frequency is a sum of a first frequency and the second offset value, and the first frequency is obtained by the terminal according to an EARFCN.
- the first offset value indicated by the information of the first offset value satisfies any one of the following formulas: X-floor(X/Raster+0.5)*Raster+7.5KHz, X -floor(X/Raster+0.5)*Raster-7.5KHz, X-floor(X/Raster)*Raster+7.5KHz, or X-floor(X/Raster)*Raster-7.5KHz.
- floor() represents rounding down
- X is an integer multiple of 100KHz
- X ranges from 0 to (Y-100) KHz
- Y is a common multiple of 100KHz and Raster
- Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the information of the first offset value includes any one of a first value to an eleventh value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz; and the third value indicates that the first offset value is -7.5 KHz;
- the fourth value indicates that the first offset value is +(Raster2-Raster1)+7.5KHz;
- the fifth value indicates that the first offset value is +(Raster2-Raster1)-7.5KHz;
- the sixth value indicates the first The offset value is -(Raster2-Raster1)+7.5KHz;
- the seventh value indicates that the first offset value is -(Raster2-Raster1)-7.5KHz;
- the eighth value indicates that the first offset value is +Raster1 +7.5KHz;
- the ninth value indicates that the first offset value is +Raster1 - 7.5KHz;
- the tenth value indicates that the first offset value is -Raster1 + 7.5KHz;
- the first carrier is a downlink carrier shared by the first communication mode and the second communication mode.
- the subcarrier mapping mode of the first communication mode is the first subcarrier mapping mode
- the subcarrier mapping mode of the second communication mode is the second subcarrier mapping mode.
- the embodiment of the present application provides a base station, including: a processor, configured to perform subcarrier mapping on a first carrier according to a first subcarrier mapping manner, where the first subcarrier mapping manner corresponds to a subcarrier.
- the subcarrier corresponding to the second subcarrier mapping manner has a frequency offset of a first offset value, and the subcarrier corresponding to the second subcarrier mapping manner is symmetric with respect to a carrier center frequency of the first carrier There is no subcarrier on the carrier center frequency of the first carrier; the transceiver is configured to send indication information to the terminal, where the indication information carries information of the first offset value.
- the base station may perform subcarrier mapping according to the first subcarrier mapping manner on the shared carrier, thereby reducing on the base station side. Or eliminate subcarrier interference caused by the simultaneous existence of different subcarrier mapping modes.
- the base station adjusts the subcarrier mapping mode of the NR in the shared carrier, so that the subcarrier mapping mode of the NR is mapped according to the LTE subcarrier mapping manner, thereby avoiding NR and LTE in the shared carrier.
- Inter-subcarrier interference The base station can send the indication information to the terminal, so that the terminal can acquire the actual mapped frequency position of the subcarrier of the NR, so that the terminal can perform more accurate frequency synchronization, and avoid sampling caused by different subcarrier mapping frequency values determined by the terminal and the base station.
- a transmission failure condition caused by a frequency failure occurs.
- the indication information further includes an evolved universal land surface wireless access absolute radio channel number EARFCN of the first carrier.
- the indication information may be carried in a system message or an RRC signaling.
- the information of the first offset value includes a first value or a second value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz, or the second value indicates the first offset value It is -7.5KHz.
- the indication information further carries information of the second offset value.
- the second offset value indicated by the information of the second offset value satisfies the formula X-floor(X/Raster+0.5)*Raster, or satisfies the formula X-floor(X/Raster)*Raster.
- X is an integer multiple of 100KHz, and X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster, and Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is any one of +(Raster2-Raster1), -(Raster2-Raster1), +Raster1, or -Raster1.
- the Raster1 is the value of the first channel raster
- the Raster2 is the value of the second channel raster
- the first channel raster is the channel grid used by the communication mode corresponding to the first subcarrier mapping mode.
- the second channel grid is a channel grid used by the communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is a set of values ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, 50, -60, 60, - Any of the elements 70, 70, -80, 80, -90, 90 ⁇ .
- the first offset value indicated by the information of the first offset value satisfies any one of the following formulas: X-floor(X/Raster+0.5)*Raster+7.5KHz, X -floor(X/Raster+0.5)*Raster-7.5KHz, X-floor(X/Raster)*Raster+7.5KHz, or X-floor(X/Raster)*Raster-7.5KHz.
- floor() represents rounding down
- X is an integer multiple of 100KHz
- X ranges from 0 to (Y-100) KHz
- Y is a common multiple of 100KHz and Raster
- Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the information of the first offset value includes any one of a first value to an eleventh value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz; and the third value indicates that the first offset value is -7.5 KHz;
- the fourth value indicates that the first offset value is +(Raster2-Raster1)+7.5KHz;
- the fifth value indicates that the first offset value is +(Raster2-Raster1)-7.5KHz;
- the sixth value indicates the first The offset value is -(Raster2-Raster1)+7.5KHz;
- the seventh value indicates that the first offset value is -(Raster2-Raster1)-7.5KHz;
- the eighth value indicates that the first offset value is +Raster1 +7.5KHz;
- the ninth value indicates that the first offset value is +Raster1 - 7.5KHz;
- the tenth value indicates that the first offset value is -Raster1 + 7.5KHz;
- the first carrier is a downlink carrier shared by the first communication mode and the second communication mode.
- the subcarrier mapping mode of the first communication mode is the first subcarrier mapping mode
- the subcarrier mapping mode of the second communication mode is the second subcarrier mapping mode.
- the embodiment of the present application provides a terminal, including: a transceiver, configured to receive indication information from a base station, where the indication information carries information of a first offset value, where the first offset value is The frequency of the subcarrier corresponding to the first subcarrier mapping mode is relative to the frequency of the subcarrier corresponding to the second subcarrier mapping mode, and the subcarrier corresponding to the second subcarrier mapping mode is symmetric with respect to the carrier center frequency of the first carrier
- the carrier has no subcarriers on the carrier center frequency of the first carrier; the processor is configured to determine the first carrier according to the indication information, the second subcarrier mapping manner, and a carrier center frequency of the first carrier The frequency position of one or more subcarriers.
- the terminal can obtain the frequency position of the actual mapping of the subcarrier corresponding to the second subcarrier mapping manner by receiving the indication information. Further, more accurate frequency synchronization can be performed, and the occurrence of a transmission failure caused by the failure of the sampling frequency due to the difference in the subcarrier mapping frequency values determined by the terminal and the base station can be avoided.
- the first subcarrier mapping mode is a subcarrier mapping mode of LTE
- the second subcarrier mapping mode is a subcarrier mapping mode of NR.
- the indication information further includes an evolved universal land surface radio access absolute radio channel number EARFCN of the first carrier, where the processor is further configured to obtain a carrier center frequency of the first carrier according to the EARFCN.
- EARFCN evolved universal land surface radio access absolute radio channel number
- the terminal may obtain the indication information by receiving a system message or RRC signaling.
- the information of the first offset value includes a first value or a second value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz, or the second value indicates the first offset value It is -7.5KHz.
- the indication information further carries information of the second offset value.
- the second offset value indicated by the information of the second offset value satisfies the formula X-floor(X/Raster+0.5)*Raster, or satisfies the formula X-floor(X/Raster)*Raster.
- X is an integer multiple of 100KHz, and X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster, and Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is any one of +(Raster2-Raster1), -(Raster2-Raster1), +Raster1, or -Raster1.
- the Raster1 is the value of the first channel raster
- the Raster2 is the value of the second channel raster
- the first channel raster is the channel grid used by the communication mode corresponding to the first subcarrier mapping mode.
- the second channel grid is a channel grid used by the communication mode corresponding to the second subcarrier mapping mode.
- the second offset value is a set of values ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, 50, -60, 60, - Any of the elements 70, 70, -80, 80, -90, 90 ⁇ .
- the terminal obtains a carrier center frequency of the first carrier according to the second offset value and the first frequency.
- the carrier center frequency is a sum of a first frequency and the second offset value
- the first frequency is obtained by the terminal according to an EARFCN.
- the first offset value indicated by the information of the first offset value satisfies any one of the following formulas: X-floor(X/Raster+0.5)*Raster+7.5KHz, X -floor(X/Raster+0.5)*Raster-7.5KHz, X-floor(X/Raster)*Raster+7.5KHz, or X-floor(X/Raster)*Raster-7.5KHz.
- X is an integer multiple of 100KHz, and X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster, and Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the information of the first offset value includes any one of a first value to an eleventh value.
- the first value indicates that the first offset value is 0; the second value indicates that the first offset value is +7.5 KHz; and the third value indicates that the first offset value is -7.5 KHz;
- the fourth value indicates that the first offset value is +(Raster2-Raster1)+7.5KHz;
- the fifth value indicates that the first offset value is +(Raster2-Raster1)-7.5KHz;
- the sixth value indicates the first The offset value is -(Raster2-Raster1)+7.5KHz;
- the seventh value indicates that the first offset value is -(Raster2-Raster1)-7.5KHz;
- the eighth value indicates that the first offset value is +Raster1 +7.5KHz;
- the ninth value indicates that the first offset value is +Raster1 - 7.5KHz;
- the tenth value indicates that the first offset value is -Raster1 + 7.5KHz;
- the first carrier is a downlink carrier shared by the first communication mode and the second communication mode.
- the subcarrier mapping mode of the first communication mode is the first subcarrier mapping mode
- the subcarrier mapping mode of the second communication mode is the second subcarrier mapping mode.
- the embodiment of the present application provides a method for transmitting carrier information, including: determining, by a base station, a second offset value according to a first channel grid and a second channel raster; and sending, by the base station, the second Information about the offset value.
- the second offset value is a set of ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, 50, -60, 60, -70, 70, Any of the elements -80,80,-90,90 ⁇ .
- the second offset value satisfies the formula X-floor(X/Raster+0.5)*Raster or satisfies the formula X-floor(X/Raster)*Raster.
- X is an integer multiple of 100KHz, and X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster, and Raster is the second channel gate.
- the value of the grid By this method, the terminal can obtain the actual carrier center frequency. In turn, the terminal can perform more accurate frequency synchronization, and avoids the occurrence of transmission failure caused by the failure of the sampling frequency due to the difference in the center frequency of the subcarriers of the terminal and the base station.
- the value of the second offset value is in the set ⁇ 0, -20, 20, -40, 40, -60, 60, -80, 80 ⁇ . Any element.
- the value of the second offset value is a set of ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, Any of 50, -60, 60, -70, 70, -80, 80, -90, 90 ⁇ .
- the base station also sends an EARFCN to the terminal.
- the first channel grid is a channel grid of LTE and the second channel grid is a channel grid of NR.
- the embodiment of the present application provides a method for determining a carrier center frequency, including: receiving, by a terminal, information of a second offset value from a base station; and obtaining, by the terminal, a carrier according to the second offset value and the first frequency a center frequency, the carrier center frequency being a sum of a first frequency and the second offset value, the first frequency being obtained by the terminal according to an EARFCN.
- the terminal can obtain the actual carrier center frequency. Further, more accurate frequency synchronization can be performed, and the transmission failure condition caused by the failure of the sampling frequency due to the difference in the center frequency of the subcarriers of the terminal and the base station is avoided.
- the second offset value is a set of ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, 50, -60, 60, -70, 70, Any of the elements -80,80,-90,90 ⁇ .
- the second offset value satisfies the formula X-floor(X/Raster+0.5)*Raster or satisfies the formula X-floor(X/Raster)*Raster.
- the carrier center frequency is a sum of the first frequency and the second offset value, and the first frequency is obtained by the terminal according to an EARFCN.
- floor() represents rounding down
- X is an integer multiple of 100KHz
- X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster
- Raster is a channel grid. value.
- the value of the second offset value is in the set ⁇ 0, -20, 20, -40, 40, -60, 60, -80, 80 ⁇ . Any element.
- the value of the second offset value is a set of ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, Any of 50, -60, 60, -70, 70, -80, 80, -90, 90 ⁇ .
- the embodiment of the present application further provides a base station for performing the method of the fifth aspect.
- the base station can include a transceiver and a processor.
- the processor is configured to determine a second offset value according to the first channel grid and the second channel grid; the transceiver is configured to send information of the second offset value to the terminal.
- the embodiment of the present application further provides a terminal for performing the method of the sixth aspect.
- the terminal can include a transceiver and a processor.
- the transceiver is configured to receive information of a second offset value from a base station, where the processor is configured to obtain a carrier center frequency according to the second offset value and a first frequency, where the carrier center frequency is a first frequency and The sum of the second offset values, the first frequency being obtained by the terminal according to the EARFCN.
- the embodiment of the present application provides a method for receiving an uplink signal, including: determining, by a base station, an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner, where The uplink subcarrier corresponding to the first mapping mode and the downlink subcarrier have a frequency domain offset of the half subcarrier, and the uplink subcarrier corresponding to the second mapping manner is aligned with the downlink subcarrier in the frequency domain; The downlink carrier where the carrier is located is paired with the uplink carrier where the uplink subcarrier is located; the base station receives the uplink signal according to the uplink subcarrier mapping manner.
- the uplink signal is the first mapping mode
- N SC uplink signal of the UE is currently occupied by a number of sub-carriers in the frequency domain
- the sub-carrier spacing [Delta] f a k
- a signal value representative of the time-frequency resource units l k representative of the frequency domain subcarrier index
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the number of IFFT points
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index.
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the embodiment of the present application provides a method for transmitting an uplink signal, including: determining, by a terminal, an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner, where The uplink subcarrier corresponding to the first mapping mode and the downlink subcarrier have a frequency domain offset of the half subcarrier, and the uplink subcarrier corresponding to the second mapping manner is aligned with the downlink subcarrier in the frequency domain; The downlink carrier where the carrier is located is paired with the uplink carrier where the uplink subcarrier is located; the terminal sends an uplink signal according to the uplink subcarrier mapping manner.
- the uplink signal is the first mapping mode
- N is the number of IFFT points
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index.
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the number of IFFT points
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index.
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the embodiment of the present application provides a base station, including: a determining module, configured to determine an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner, where the The uplink subcarrier corresponding to the mapping mode and the downlink subcarrier have a frequency domain offset of the half subcarrier, and the uplink subcarrier and the downlink subcarrier corresponding to the second mapping manner are aligned in the frequency domain; the downlink subcarrier The downlink carrier is in pair with the uplink carrier where the uplink subcarrier is located, and the receiving module is configured to receive the uplink signal according to the uplink subcarrier mapping manner.
- a determining module configured to determine an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner, where the The uplink subcarrier corresponding to the mapping mode and the downlink subcarrier have a frequency domain offset of the half subcarrier, and the uplink subcarrier and the down
- the embodiment of the present application provides a terminal, including: a determining module, configured to determine an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner, where The uplink subcarrier corresponding to the first mapping mode and the downlink subcarrier have a frequency domain offset of the half subcarrier, and the uplink subcarrier corresponding to the second mapping manner is aligned with the downlink subcarrier in the frequency domain;
- the downlink carrier where the carrier is located is paired with the uplink carrier where the uplink subcarrier is located, and the sending module is configured to send an uplink signal according to the uplink subcarrier mapping manner.
- the embodiment of the present application provides a computer storage medium for storing computer software instructions used by the network device or the UE, which includes a program designed to execute the foregoing method.
- FIG. 1 is a schematic diagram of subcarrier mapping of an LTE downlink carrier
- 2 is a schematic diagram of subcarrier mapping of an LTE uplink carrier
- 3 is a schematic diagram of inter-subcarrier interference when a downlink carrier is shared between NR and LTE;
- FIG. 4 is a schematic diagram of an NR sharing an uplink carrier with LTE
- 5 is a schematic diagram of an NR sharing a downlink carrier and a downlink carrier with LTE;
- FIG. 6 is a schematic flowchart of a communication method according to an embodiment of the present application.
- FIG. 7 is a schematic structural diagram of a base station involved in an embodiment of the present application.
- FIG. 8 is a simplified schematic diagram of a possible design structure of a terminal involved in an embodiment of the present application.
- FIG. 9 is a schematic flow chart of a method for receiving an uplink signal
- FIG. 10 is a schematic diagram of a first mapping manner
- FIG. 11 is a schematic diagram of a second mapping manner
- FIG. 12 is a schematic diagram of a first mapping manner and a second mapping manner
- FIG. 13 is a schematic flow chart of a method for transmitting an uplink signal.
- the base station in this embodiment of the present application is a device deployed in a radio access network to provide a wireless communication function for a terminal. It may include various forms of macro base stations, micro base stations (also known as small stations), relay stations, access points, and the like. In a system using different radio access technologies, the name of a device with a base station function may be different.
- an evolved Node B (English: evolved NodeB; abbreviated as: eNB or eNodeB)
- Node B International: Node B
- NR new Radio
- the terminal in the embodiment of the present application may refer to a user equipment, including but not limited to a mobile station (English: Mobile Station; MS: mobile terminal), a mobile terminal (English: Mobile Terminal), a mobile phone (English: Mobile Telephone), and a mobile phone ( English: handset), portable equipment (English: portable equipment), and handheld devices with wireless communication capabilities, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, and terminal devices in NR networks.
- FIG. 1 is a schematic diagram of subcarrier mapping of an LTE downlink carrier. As shown in FIG. 1, fc represents the downlink carrier center frequency, and the DC subcarrier is located at fc.
- the uplink subcarrier is symmetric about the uplink carrier center frequency.
- 2 is a schematic diagram of subcarrier mapping of an LTE uplink carrier. As shown in FIG. 2, where fc represents the uplink carrier center frequency, the uplink subcarrier is symmetric about fc.
- Both the downlink and uplink subcarrier mappings of the NR do not reserve DC subcarriers, and the uplink and downlink subcarrier mapping manners of the NR are the same.
- the NR may adopt the subcarrier mapping manner shown in FIG. 2.
- FIG. 3 is a schematic diagram of inter-subcarrier interference when NR and LTE share a downlink carrier.
- FDM frequency division multiplexing
- the center frequency of the carrier must be an integer multiple of 100 kHz, that is, the center frequency of the carrier needs to satisfy the channel raster rule, that is, the carrier center frequency is an integer multiple of the value of the channel grid.
- the uplink carrier center frequency and the downlink carrier center frequency are identified by an evolved universal terrestrial radio access (E-UTRA) absolute radio frequency channel number (EARFCN).
- E-UTRA evolved universal terrestrial radio access
- E-UTRA absolute radio frequency channel number
- the terminal searches on a carrier frequency that is an integer multiple of 100 kHz.
- the terminal searches for a cell that can communicate, it tries to camp on the cell, and obtains the downlink carrier center frequency of the cell according to the searched channel raster result, and reads the broadcast message sent by the base station of the cell.
- the broadcast message contains the uplink EARFCN of the cell.
- the terminal can obtain the uplink carrier center frequency of the cell according to the EARFCN, and then initiate random access on the uplink carrier center frequency, so that the connection can be established with the base station.
- the carrier center frequency can be regarded as the center frequency of the carrier, and is also referred to as the carrier frequency in some cases.
- NR and LTE can coexist in the form of shared carriers. Therefore, when the shared carrier is a carrier of LTE, it is necessary to consider the subcarrier mapping of LTE and the limitation of the channel grid.
- Embodiments of the present application provide a method for reducing or eliminating subcarrier interference caused by subcarrier mapping or channel grid, which will be described in detail below.
- 4 is a schematic diagram of an NR sharing an uplink carrier with LTE.
- the dedicated carrier of the NR is a downlink carrier, and further, the transmission mode of the dedicated carrier of the NR may be a Time Division Duplexing (TDD) method.
- the NR shares the uplink carrier of LTE with LTE. Further, the transmission mode of the shared uplink carrier may be a (Frequency Division Duplexing, FDD) mode.
- NR and LTE share the uplink carrier of LTE in a time division multiplexing (TDM) manner in some subframes or time slots, such as time slot 3 or subframe 3 in FIG. 4 .
- TDM time division multiplexing
- NR and LTE share the uplink carrier of LTE in a frequency division multiplexing (FDM) manner in some subframes or time slots, such as time slot 8 or subframe 8 in FIG. 4 .
- SRS is a sounding reference signal (SRS)
- FIG. 5 is a schematic diagram of an NR sharing a downlink carrier and a downlink carrier with LTE.
- the NR shares the downlink carrier and the uplink carrier of LTE with LTE.
- the manner in which the NR and the LTE share the LTE carrier may be the FDM mode or the TDM mode.
- the NR occupies the slot 3 or the subframe 3, that is, the TDM mode.
- the NR and the LTE share the downlink carrier of the LTE in some subframes or time slots, such as the time slot 8 or the subframe 8 in FIG. 5, that is, the FDM mode.
- the NR in FIG. 5 is not different from the dedicated carrier of the LTE carrier, but the dedicated carrier different from the LTE carrier may also be allocated to the NR.
- the PDCCH is a physical downlink control channel (PDCCH).
- time slots or subframes are only an example, and the number of slots and the position may be changed according to actual needs.
- the NR and the LTE share only the downlink carrier.
- FIG. 4 or FIG. 5 For the specific sharing mode, refer to FIG. 4 or FIG. 5, and details are not described herein again.
- the NR shares the carrier with the LTE, it is necessary to consider the interference problem between the subcarrier of the NR and the subcarrier of the LTE due to the difference in the subcarrier mapping manner.
- the downlink carrier of the LTE has a DC subcarrier reservation
- the uplink carrier has no subcarrier reservation on the carrier center frequency of the first carrier
- the uplink carrier and the downlink carrier of the NR are both at the carrier center of the first carrier.
- the inter-subcarrier interference may occur due to the difference between the NR subcarrier and the LTE subcarrier mapping mode or the subcarrier mapping frequency position differs by half subcarrier. .
- the inter-subcarrier interference shown in FIG. Similarly, similar problems may exist if NR shares an uplink carrier with LTE.
- the NR subcarrier mapping mode may be the same as the LTE mode on the shared carrier (for example, when sharing the downlink carrier, both NR and LTE adopt FIG. 1) Subcarrier mapping method). From another point of view, it can also be considered that when the NR performs subcarrier mapping in the manner of FIG. 1 (or FIG. 2), the result of subcarrier mapping is shifted by half compared to the method according to FIG. 2 (or FIG. 1). Carrier.
- the frequency deviation occurs when the terminal still processes according to the original mapping mode of NR. Therefore, the base station needs to notify the terminal related information so that the terminal can obtain the actual frequency position of the subcarrier mapping according to the related information.
- FIG. 6 is a schematic flowchart diagram of a communication method according to an embodiment of the present application. As shown in FIG. 6, the method includes the following steps.
- Step 601 The base station performs subcarrier mapping on the first carrier according to the first subcarrier mapping manner.
- the subcarrier in the first subcarrier mapping manner has a frequency offset of a first offset value with respect to the subcarrier in the second subcarrier mapping manner. Further, the subcarriers in the first subcarrier mapping manner are symmetric with respect to the carrier center frequency of the first carrier and have DC subcarriers, and the subcarriers in the second subcarrier mapping manner are symmetric with respect to the carrier center frequency of the first carrier. There are no subcarriers on the carrier center frequency of the first carrier. In addition, when the frequency widths of the subcarriers in the first subcarrier mapping manner and the second subcarrier mapping manner are the same, the first offset value may be a frequency width of a half subcarrier.
- the first subcarrier mapping mode may be a subcarrier mapping mode of the LTE
- the second subcarrier mapping mode may be a subcarrier mapping mode of the NR.
- the first subcarrier mapping mode may be the subcarrier mapping mode shown in FIG. 1
- the second subcarrier mapping mode may be the subcarrier mapping mode shown in FIG. 2.
- the dedicated carrier of the NR may similarly perform subcarrier mapping according to the processing manner of the shared carrier of NR and LTE.
- the first carrier is a downlink carrier shared by the NR and the LTE, and the subcarrier mapping manner of the first carrier may be consistent with the LTE, and the subcarrier mapping is offset by half a subcarrier with respect to the carrier center frequency. From another perspective, when subcarrier mapping, the actual carrier carrier center frequency is offset by half a subcarrier.
- Step 602 The base station sends indication information to the terminal, where the indication information carries information of the first offset value.
- the indication information may be carried in a system message or an RRC signaling.
- the information of the first offset value may be one of one or more possible values.
- the one or more possible values correspond to one or more possible conditions of the first offset value. For example, when the first offset value is -7.5 kHz, +7.5 kHz, or 0, the information of the first offset value may be a first value, a second value, or a third value, where the first value represents the first offset
- the shift value is -7.5KHz, and so on.
- the information of the first offset value is a first value indicating that the first offset value is offset by half a subcarrier in a first direction
- the information of the first offset value is a second value indicating a first offset
- the shift value is offset by half a subcarrier in the second direction
- the information of the first offset value is a third value indicating that no offset is performed.
- the information of the first offset value may not include the third value, and accordingly, the first offset value does not include the case of 0.
- the base station can notify the terminal of the NR of the subcarrier mapping manner of the first carrier.
- This implementation can be applied to both the case of sharing a downlink carrier and the case of sharing an uplink carrier.
- the downlink subcarrier mapping mode of LTE is as shown in FIG. 1 .
- the NR in the shared downlink carrier can be subcarrier mapped according to the LTE subcarrier mapping manner (for example, the mapping method of FIG. 1).
- the NR in the shared downlink carrier is subcarrier mapped according to the NR subcarrier mapping manner (for example, the mapping manner of FIG. 2, wherein the subcarrier width of the NR and the subcarrier width of the LTE are the same). , and offset by half a subcarrier.
- the frequency offset value of the subcarrier of the NR may be -7.5 Khz, or +7.5 Khz.
- the indication information directly carries one or more values corresponding to the first offset value.
- One possible implementation can be represented by Table 1.
- the frequency offset can be -7.5 KHz, or +7.5 KHz.
- the above table is only an example, and a corresponding table may be separately designed for the shared downlink carrier and the shared uplink carrier.
- the indication information may also have more values. For example, when the indication information is the third value, the frequency offset is x Hz, and x may be any real number.
- the indication information corresponds to the first offset value, and the corresponding relationship (or the table) may be pre-agreed by the base station and the terminal, or may be configured in the base station and the terminal respectively.
- Table 2 indicates another form of information
- Subcarrier mapping does not perform frequency offset 1
- the indication information may directly be a specific value of the frequency offset, for example, the indication information is -7.5 KHz, +7.5 KHz, or 0.
- the shared carrier may be an FDD carrier (eg, NR and LTE in slot 8 in FIG. 5 share the carrier by frequency division).
- the terminal needs to notify the terminal to share the indication information of the carrier, so that the terminal can acquire the frequency position of the subcarrier of the NR according to the indication information.
- the base station may notify the terminal to share the EARFCN of the carrier and the indication information.
- the synchronization channel is at the center of the frequency band of the entire shared carrier, and there is no need to notify the EARFCN at this time.
- the terminal can acquire the carrier center frequency by detecting the synchronization channel, so it is only necessary to notify the indication information.
- the base station may notify the indication information (or related carrier information) of the shared carrier through the dedicated downlink carrier.
- the EARFCN of the shared carrier can also be notified by the dedicated downlink carrier. It should be noted that the EARFCN is used to indicate the center frequency of a carrier, which can be replaced by other parameters that can implement the function, which is not limited in this application.
- Step 603 The terminal receives the indication information from the base station.
- the indication information carries the information of the first offset value, where the first offset value is a frequency offset of the subcarrier corresponding to the first subcarrier mapping manner and the subcarrier corresponding to the second subcarrier mapping manner.
- the subcarriers in the first subcarrier mapping manner are symmetric with respect to the carrier center frequency of the first carrier and have DC subcarriers
- the subcarriers in the second subcarrier mapping manner are symmetric with respect to the carrier center frequency of the first carrier. There are no subcarriers on the carrier center frequency of the first carrier.
- the first offset value may be a frequency width of a half subcarrier.
- the terminal may obtain the indication information by receiving a system message or RRC signaling.
- the information of the first offset value may be one of one or more possible values.
- the one or more possible values correspond to one or more possible conditions of the first offset value. For example, when the first offset value is -7.5 kHz, +7.5 kHz, or 0, the information of the first offset value may be a first value, a second value, or a third value, where the first value represents the first offset
- the shift value is -7.5KHz, and so on.
- the information of the first offset value is a first value indicating that the first offset value is offset by half a subcarrier in a first direction
- the information of the first offset value is a second value indicating a first offset
- the shift value is offset by half a subcarrier in the second direction
- the information of the first offset value is a third value indicating that no offset is performed.
- the information of the first offset value may not include the third value, and accordingly, the first offset value does not include the case of 0.
- the terminal can also receive the EARFCN from the base station.
- Step 604 The terminal determines a frequency position of one or more subcarriers of the first carrier according to the indication information, the second subcarrier mapping manner, and the carrier center frequency of the first carrier.
- the terminal offsets the carrier center frequency of the first carrier according to the first offset value indicated by the indication information, to obtain the actual carrier center frequency of the subcarrier mapping according to the second subcarrier mapping manner, and further, according to the actual carrier.
- the center frequency and the second subcarrier mapping manner may result in one or more subcarrier frequency positions.
- the terminal may determine the frequency position of the subcarriers of the NR according to the indication information.
- the terminal after the terminal acquires the carrier center frequency of the first carrier by using the EARFCN, the terminal acquires the first frequency position of the one or more subcarriers by using the subcarrier mapping manner of the NR, and indicates according to the indication information.
- An offset value (or subcarrier mapping frequency offset value) further acquires a second frequency location of one or more subcarriers. Wherein the second frequency location has a frequency offset from the first frequency location with a first offset value.
- the carrier center frequency of the first carrier may be acquired by the terminal by using the EARFCN carried in the broadcast message or the dedicated message, or may be acquired by the terminal when receiving the synchronization signal.
- F DL_low and N Offs-DL can be specified by the standard, as shown in Table 3. For example, when the base station informs the terminal that the downlink EARFCN (or N DL ) is 10, the value range of the N DL is 0-599.
- the terminal may obtain the actual carrier center of the first carrier subcarrier mapping according to the first offset value (or the subcarrier mapping frequency offset value) carried in the indication information. Frequency, thereby obtaining the frequency value of the first carrier subcarrier mapping.
- the terminal may directly perform the first offset value (or the subcarrier mapping frequency offset value indicated by the EARFCN and the indication information, and may use F offs to obtain the subcarrier if the first carrier performs the second subcarrier mapping manner.
- the center frequency of the carrier in LTE must be an integer multiple of 100 kHz, that is, the center frequency of the carrier needs to satisfy the channel grid rule.
- the channel grid rule of NR may follow the rules of LTE, and may also be different from LTE.
- the center frequency of the carrier of NR may be an integer multiple of 300 kHz. That is to say, when the channel grids of NR and LTE are different, it is necessary to further consider the frequency offset due to the difference of the channel grid.
- the indication information may further carry information of a second offset value, which is a frequency offset due to a difference in the channel grid.
- the second offset value satisfies the formula X-floor(X/Raster_NR+0.5)*Raster_NR or satisfies the formula X-floor(X/Raster_NR)*Raster_NR, where floor represents rounding down X is an integer multiple of 100 kHz, and the value is from 0 to (Y-100), where Y is a common multiple of 100 kHz and Raster_NR, Raster_NR represents the value of the channel grid of NR, and the unit of the second offset value is KHz.
- Y can be calculated, and the range of values of all the optional Xs is further calculated, thereby obtaining all optional values of the second offset value.
- the value of the channel grid of the NR is 300 KHz
- the value of Y is 300 Khz
- the possible value of the second offset value is 0, 100 KHz, -100 KHz.
- the value of the second offset value may be as shown in Table 4.
- the correspondence between the base station and the terminal may be pre-agreed by the base station and the terminal, or may be configured in the base station and the terminal respectively. E.g:
- Second offset value meaning 0 0 1 100KHz 2 -100KHz
- the terminal may process according to the operation mode of the first offset value in the foregoing. , will not repeat them here.
- the indication information may carry information of the total offset value or only the information of the total offset value.
- the total offset value may be obtained according to the first offset value and the second offset value, for example, the total offset value is a sum of the first offset value and the second offset value.
- the total offset value is as shown in Table 5 or Table 6.
- the correspondence in Table 5 or 6 may be performed by the base station. It may be pre-arranged with the terminal, or may be configured in the base station and the terminal separately.
- the value of the Channel Raster of the NR is 180 KHz
- the value of Y is 900 KHz
- the value of the second offset value may be as shown in Table 7.
- the correspondence between the base station and the terminal may be pre-agreed by the base station and the terminal, or may be configured in the base station and the terminal respectively.
- Second offset value Meaning (unit: KHz) 0 0 1 20 2 -20 3 40 4 -40 5 60
- the value of the total offset value is as shown in Table 8 or Table 9, and the correspondence in Table 8 or 9 may be performed by the base station. It may be pre-arranged with the terminal, or may be configured in the base station and the terminal separately.
- the base station may also only inform the terminal of the information of the second offset value when there is no frequency deviation due to the subcarrier mapping. For example, the base station determines a second offset value according to the first channel grid and the second channel grid; the base station sends the information of the second offset value to the terminal.
- the second offset value is a set of ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, 50, -60, 60, -70, 70, Any of the elements -80,80,-90,90 ⁇ .
- the second offset value satisfies the formula X-floor(X/Raster+0.5)*Raster or satisfies the formula X-floor(X/Raster)*Raster.
- floor() represents rounding down
- X is an integer multiple of 100KHz
- X ranges from 0 to (Y-100) KHz
- Y is a common multiple of 100KHz and Raster
- Raster is the second channel gate.
- the value of the grid Specifically, when the second channel grid is 180 kHz, the value of the second offset value is in the set ⁇ 0, -20, 20, -40, 40, -60, 60, -80, 80 ⁇ . Any element.
- the value of the second offset value is a set of ⁇ 0, -10, 10, -20, 20, -30, 30, -40, 40, -50, Any of 50, -60, 60, -70, 70, -80, 80, -90, 90 ⁇ .
- the unit of any of the above sets may be KHz.
- the first channel grid is a channel grid of LTE and the second channel grid is a channel grid of NR.
- the base station When the carrier is shared by the NR and the LTE, the base station adjusts the subcarrier mapping mode of the NR in the shared carrier, so that the subcarrier mapping mode of the NR is mapped according to the subcarrier mapping mode of the LTE, and the subcarriers of the NR and the LTE in the shared carrier are avoided. Interference.
- the base station can send the indication information to the terminal, so that the terminal can acquire the actual mapped frequency position of the subcarrier of the NR, thereby performing more accurate frequency synchronization, and avoiding the sampling frequency failure band caused by the difference of the subcarrier mapping frequency values determined by the terminal and the base station. The transmission failure occurred.
- the embodiment of the present application avoids the problem of subcarrier interference in the shared carrier, and on the other hand, ensures the frequency synchronization of the NR, improves the frequency band utilization of the shared carrier, and improves the coverage of the NR through the sharing of the low frequency carrier. Mobile performance.
- the method for transmitting carrier information, the method for determining a subcarrier, and related signaling provided by the embodiments of the present application are introduced from the perspective of a base station and a terminal.
- the terminal and the base station include hardware structures and/or software modules corresponding to each function.
- the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
- FIG. 7 is a schematic structural diagram of a base station involved in an embodiment of the present application.
- the base station shown in FIG. 7 includes a transceiver 701, a controller/processor 702.
- the transceiver 701 can be configured to support receiving and receiving information between the base station and the terminal in the foregoing embodiment, and supporting radio communication between the terminal and other UEs.
- the controller/processor 702 can be used to perform various functions for communicating with a terminal or other network device.
- On the uplink the uplink signal from the terminal is received via the antenna, coordinated by the transceiver 701, and further processed by the controller/processor 702 to recover the service data and signaling information transmitted by the terminal.
- traffic data and signaling messages are processed by controller/processor 702 and mediated by transceiver 701 to generate downlink signals for transmission to the terminal via the antenna.
- the controller/processor 702 may be configured to perform subcarrier mapping on the first carrier according to the first subcarrier mapping manner, where the subcarrier corresponding to the first subcarrier mapping manner is mapped with respect to the second subcarrier.
- the corresponding subcarrier has a frequency offset of a first offset value
- the subcarrier corresponding to the second subcarrier mapping manner is symmetric about a carrier center frequency of the first carrier and is at a carrier center frequency of the first carrier There are no subcarriers.
- the transceiver 701 can be configured to send indication information to the terminal, where the indication information carries information of the first offset value.
- the first offset value indicated by the information of the first offset value satisfies any one of the following formulas: X-floor(X/Raster+0.5)*Raster+7.5KHz, X-floor( X/Raster+0.5)*Raster-7.5KHz, X-floor (X/Raster)*Raster+7.5KHz, or X-floor(X/Raster)*Raster-7.5KHz.
- floor() represents rounding down
- X is an integer multiple of 100KHz
- X ranges from 0 to (Y-100) KHz
- Y is a common multiple of 100KHz and Raster
- Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the first carrier is a downlink carrier shared by the first communication mode and the second communication mode; and the subcarrier mapping mode of the first communication mode is the first subcarrier mapping mode; The subcarrier mapping mode of the two communication modes is the second subcarrier mapping mode.
- Figure 7 only shows a simplified design of the base station.
- the base station may include any number of transmitters, receivers, processors, controllers, memories, communication units, etc., and all base stations that can implement the present application are within the scope of the present application.
- FIG. 8 is a simplified schematic diagram of a possible design structure of a terminal involved in the embodiment of the present application, where the terminal may be one of the terminals mentioned above.
- the terminal includes a transceiver 801, a controller/processor 802, and may further include a memory 803 and a modem processor 804.
- Transceiver 801 conditions (e.g., analog transforms, filters, amplifies, and upconverts, etc.) the output samples and generates an uplink signal that is transmitted via an antenna to the base station described in the above embodiments.
- the antenna receives the downlink signal transmitted by the base station in the above embodiment.
- Transceiver 801 conditions (eg, filters, amplifies, downconverts, digitizes, etc.) signals received from the antenna and provides input samples.
- encoder 8041 receives traffic data and signaling messages to be transmitted on the uplink and processes (e.g., formats, codes, and interleaves) the traffic data and signaling messages.
- Modulator 8042 further processes (e.g., symbol maps and modulates) the encoded traffic data and signaling messages and provides output samples.
- Demodulator 8044 processes (e.g., demodulates) the input samples and provides symbol estimates.
- the decoder 8043 processes (e.g., deinterleaves and decodes) the symbol estimate and provides decoded data and signaling messages that are sent to the terminal.
- Encoder 8041, modulator 8042, demodulator 8044, and decoder 8043 may be implemented by a composite modem processor 804. These units are processed according to the radio access technology employed by the radio access network (e.g., access technologies of LTE and other evolved systems).
- the transceiver 801 may be configured to receive indication information from the base station, where the indication information carries information of a first offset value, where the first offset value is a subcarrier corresponding to the first subcarrier mapping manner relative to the second sub
- the frequency offset of the subcarrier corresponding to the carrier mapping mode, the subcarrier corresponding to the second subcarrier mapping manner is symmetric with respect to the carrier center frequency of the first carrier, and there is no subcarrier at the carrier center frequency of the first carrier.
- the controller/processor 802 can be configured to determine a frequency location of one or more subcarriers of the first carrier according to the indication information, the second subcarrier mapping manner, and a carrier center frequency of the first carrier.
- the information of the first offset value includes a first value or a second value; wherein the first value indicates that the first offset value is 0; and the second value indicates the first An offset value is +7.5 KHz, or the second value indicates that the first offset value is -7.5 KHz.
- the indication information further carries information of a second offset value, where the second offset value indicated by the information of the second offset value is X-floor (X/Raster+0.5)*Raster, or X-floor(X/Raster)*Raster.
- X is an integer multiple of 100KHz, and X ranges from 0 to (Y-100) KHz, where Y is a common multiple of 100KHz and Raster, and Raster is a channel grid.
- the channel grid is a channel grid used by a communication mode corresponding to the second subcarrier mapping mode.
- the first carrier is a downlink carrier shared by the first communication mode and the second communication mode; and the subcarrier mapping mode of the first communication mode is the first subcarrier mapping mode; The subcarrier mapping mode of the two communication modes is the second subcarrier mapping mode.
- the controller/processor for performing the above terminal or base station of the present application may be a central processing unit (CPU), a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), and a field programmable gate array (FPGA). Or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It is possible to implement or carry out the various illustrative logical blocks, modules and circuits described in connection with the present disclosure.
- the processor may also be a combination of computing functions, for example, including one or more microprocessor combinations, a combination of a DSP and a microprocessor, and the like.
- the processor in the embodiment of the present application may be implemented by a processing module, and the transceiver may be implemented by a transceiver module.
- the embodiment of the present application further provides a communication system including the base station shown in FIG. 7 and the terminal shown in FIG. 8.
- FIG. 9 is a schematic flow chart of a method for receiving an uplink signal. As shown in FIG. 9, the embodiment of the present application further provides a method for receiving an uplink signal, including:
- Step 901 The base station determines an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner.
- the uplink subcarrier corresponding to the first mapping mode and the downlink subcarrier have a frequency domain offset of a half subcarrier, and the downlink carrier where the downlink subcarrier is located and the uplink carrier where the uplink subcarrier is located are paired. Specifically, the uplink carrier and the downlink carrier are paired in frequency division or initial cell access.
- FIG. 10 is a schematic diagram of a first mapping manner. As shown in FIG. 10, each subcarrier in the UL carrier is not aligned with each of the DL carriers. It can be considered that there is a half subcarrier offset between the UL subcarrier and the DL subcarrier.
- the first mapping mode can be applied to a scenario in which an NR and an LTE share an LTE uplink carrier. Then, the DL in FIG. 10 may refer to a downlink carrier of LTE, and the UL may refer to an uplink carrier of NR.
- a low frequency band (such as the 800 MHz band) has a pair of LTE uplink and downlink FDD carriers, and a high frequency band (such as a frequency band of 3.5 GHz or even tens of GHz) is deployed with an NR downlink or NR TDD system, because the NR base station is high.
- the beamforming technology of large-scale antenna array can be used in the frequency band to resist the path loss caused by high frequency and enhance the downlink coverage.
- the terminal since the terminal generally adopts an omnidirectional antenna due to the limited size, the uplink transmission of the terminal has a high frequency band. Cover the issue.
- the NR terminal can be served by the downlink carrier deployed on the high frequency band of the NR and the LTE uplink carrier of the low frequency band, and the NR and the LTE share the uplink carrier of the LTE. Or use LTE uplink carrier (or part of the uplink carrier) to perform uplink transmission of NR.
- the subcarriers of the two need to be aligned, so that resource coordination and resource multiplexing between the two systems can be avoided, and interference between adjacent subcarriers can be avoided or reduced.
- the uplink subcarrier of the LTE has a frequency offset of half a subcarrier with respect to the subcarrier division manner on the absolute frequency or the LTE downlink subcarrier division manner. Therefore, the uplink subcarrier mapping mode of the NR is also required to be consistent with the LTE uplink subcarrier mapping mode.
- the uplink subcarrier of the NR has a frequency offset of half a subcarrier with respect to the subcarrier division manner on the absolute frequency or the LTE downlink subcarrier division manner.
- the uplink subcarrier corresponding to the second mapping mode is aligned with the downlink subcarrier in the frequency domain; the downlink carrier where the downlink subcarrier is located is paired with the uplink carrier where the uplink subcarrier is located. Specifically, the uplink carrier and the downlink carrier are paired in frequency division or initial cell access.
- each subcarrier in the UL carrier is aligned with each of the DL carriers. It can be considered that there is no offset of the subcarrier between the UL subcarrier and the DL subcarrier.
- the second mapping mode can be applied to a scenario in which the NR and the LTE do not share the LTE uplink carrier, or a scenario in which the NR operates independently, or can also be applied to the scenario of the flexible duplex technology in the NR system.
- the DL in FIG. 11 may refer to the downlink carrier of the NR
- the UL may refer to the uplink carrier of the NR.
- Flexible duplexing means that certain subframes on the downlink carrier of NR FDD can transmit uplink signals, and certain subframes on the uplink carrier of NR FDD can transmit downlink signals, which will bring neighboring base stations or neighboring cells.
- the current solution includes interference coordination or interference cancellation. Regardless of the solution, the uplink and downlink subcarriers need to be aligned.
- the subcarrier spacing is 15KHz, and the NR needs to support multiple subcarrier spacing deployments. For example, 15KHz subcarrier spacing is used to support mobile broadband services, and 60KHz subcarrier spacing is used to support low latency. And highly reliable business.
- the uplink subcarrier mapping mode of the NR needs to be consistent with the subcarrier division manner on the absolute frequency or the NR downlink subcarrier mapping manner.
- This has the advantage that it is not necessary to offset different frequency values for different subcarrier spacings. For example, the subcarrier spacing of 15 KHz is offset by 7.5 KHz of half subcarrier, the subcarrier spacing of 30 KHz is shifted by 15 KHz for half subcarrier, the subcarrier spacing of 60 KHz is offset by 30 KHz of half subcarrier, and so on.
- the base station determines the uplink subcarrier mapping mode, it may be determined according to a standard pre-defined uplink subcarrier mapping manner, or may be determined according to an internal algorithm. For example, the base station determines the correspondence between the frequency band and the uplink subcarrier mapping manner. In one implementation manner, the low frequency band (such as the 800 MHz frequency band) corresponds to the first mapping mode, and the high frequency band (such as the 3.5 GHz frequency band) corresponds to the second mapping mode, and the base station can determine the uplink subcarrier mapping mode according to the actual communication frequency band.
- the low frequency band such as the 800 MHz frequency band
- the high frequency band such as the 3.5 GHz frequency band
- the boundary of the uplink subcarrier corresponding to the first mapping mode and the subcarrier demarcation point of the absolute frequency have a frequency offset of a half subcarrier, and the boundary and the absolute frequency of the uplink subcarrier corresponding to the second mapping mode.
- the subcarrier demarcation points are aligned.
- 12 is a schematic diagram of a first mapping mode and a second mapping mode. As shown in FIG. 12, subcarriers in the frequency domain have subcarrier demarcation points, which may be referred to as subcarrier demarcation points of absolute frequencies. These demarcation points can be thought of as some fixed frequency points in the frequency domain.
- the boundary of the subcarrier corresponding to the first mapping mode has a frequency offset of half of the subcarriers from these demarcation points (it may also be considered as a frequency offset of (N+1/2) subcarriers, and N is an integer).
- the subcarriers corresponding to the second mapping mode are aligned with the demarcation points.
- Step 902 The base station receives an uplink signal according to the uplink subcarrier mapping manner.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the IFFT point (for example, equal to 2048 or 4096 or other values, etc.)
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing (for example, equal to 15KHz or 30KHz, etc.)
- a k the signal value at l representative of frequency resource units, k representative of the frequency domain subcarrier index, l representative of the time domain symbol index, N CP, cyclic prefix of l symbol representing l (cyclic prefix, CP) length
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sample point.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the IFFT point (for example, equal to 2048 or 4096 or other values, etc.)
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing (for example, equal to 15KHz or 30KHz, etc.)
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index
- l represents the time domain symbol index
- N CP l represents the cyclic prefix (CP) length on the symbol l
- the uplink subcarrier and the downlink subcarrier are aligned in the subcarrier frequency division, or the subcarrier frequency boundary in the uplink subcarrier and the subcarrier division manner is aligned.
- the subcarrier mapping mode can be differently adapted in different scenarios, such as the scenario where the NR system shares the uplink carrier with the LTE, and the NR system is not shared with the LTE or the flexible duplex of the NR system. To solve the problem of interference between subcarriers.
- FIG. 13 is a schematic flow chart of a method for transmitting an uplink signal. As shown in FIG. 13, the embodiment of the present application further provides a method for sending an uplink signal, including:
- Step 1301 The terminal determines an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner.
- the uplink subcarrier corresponding to the first mapping mode and the downlink subcarrier have a frequency domain offset of a half subcarrier, and the downlink carrier where the downlink subcarrier is located and the uplink carrier where the uplink subcarrier is located are paired. Specifically, the uplink carrier and the downlink carrier are paired in frequency division or initial cell access.
- FIG. 10 is a schematic diagram of a first mapping manner. As shown in FIG. 10, each subcarrier in the UL carrier is not aligned with each of the DL carriers. It can be considered that there is a half subcarrier offset between the UL subcarrier and the DL subcarrier.
- the first mapping mode can be applied to a scenario in which an NR and an LTE share an LTE uplink carrier. Then, the DL in FIG. 10 may refer to a downlink carrier of LTE, and the UL may refer to an uplink carrier of NR.
- a low frequency band (such as the 800 MHz band) has a pair of LTE uplink and downlink FDD carriers, and a high frequency band (such as a frequency band of 3.5 GHz or even tens of GHz) is deployed with an NR downlink or NR TDD system, because the NR base station is high.
- the beamforming technology of large-scale antenna array can be used in the frequency band to resist the path loss caused by high frequency and enhance the downlink coverage.
- the terminal since the terminal generally adopts an omnidirectional antenna due to the limited size, the uplink transmission of the terminal has a high frequency band. Cover the issue.
- the NR terminal can be served by the downlink carrier deployed on the high frequency band of the NR and the LTE uplink carrier of the low frequency band, and the NR and the LTE share the uplink carrier of the LTE. Or use LTE uplink carrier (or part of the uplink carrier) to perform uplink transmission of NR.
- the subcarriers of the two need to be aligned, so that resource coordination and resource multiplexing between the two systems can be avoided, and interference between adjacent subcarriers can be avoided or reduced.
- the uplink subcarrier of the LTE has a frequency offset of half a subcarrier with respect to the subcarrier division manner on the absolute frequency or the LTE downlink subcarrier division manner. Therefore, the uplink subcarrier mapping mode of the NR is also required to be consistent with the LTE uplink subcarrier mapping mode.
- the uplink subcarrier of the NR has a frequency offset of half a subcarrier with respect to the subcarrier division manner on the absolute frequency or the LTE downlink subcarrier division manner.
- the uplink subcarrier corresponding to the second mapping mode is aligned with the downlink subcarrier in the frequency domain; the downlink carrier where the downlink subcarrier is located is paired with the uplink carrier where the uplink subcarrier is located. Specifically, the uplink carrier and the downlink carrier are paired in frequency division or initial cell access.
- each subcarrier in the UL carrier is aligned with each of the DL carriers. It can be considered that there is no offset of the subcarrier between the UL subcarrier and the DL subcarrier.
- the second mapping mode can be applied to a scenario in which the NR and the LTE do not share the LTE uplink carrier, or a scenario in which the NR operates independently, or can also be applied to the scenario of the flexible duplex technology in the NR system.
- the DL in FIG. 11 may refer to the downlink carrier of the NR
- the UL may refer to the uplink carrier of the NR.
- Flexible duplexing means that certain subframes on the downlink carrier of NR FDD can transmit uplink signals, and certain subframes on the uplink carrier of NR FDD can transmit downlink signals, which will bring neighboring base stations or neighboring cells.
- the current solution includes interference coordination or interference cancellation. Regardless of the solution, the uplink and downlink subcarriers need to be aligned.
- the subcarrier spacing is 15KHz, and the NR needs to support multiple subcarrier spacing deployments. For example, 15KHz subcarrier spacing is used to support mobile broadband services, and 60KHz subcarrier spacing is used to support low latency. And highly reliable business.
- the uplink subcarrier mapping mode of the NR needs to be consistent with the subcarrier division manner on the absolute frequency or the NR downlink subcarrier mapping manner.
- This has the advantage that it is not necessary to offset different frequency values for different subcarrier spacings. For example, the subcarrier spacing of 15 KHz is offset by 7.5 KHz of half subcarrier, the subcarrier spacing of 30 KHz is shifted by 15 KHz for half subcarrier, the subcarrier spacing of 60 KHz is offset by 30 KHz of half subcarrier, and so on.
- the terminal determines the uplink subcarrier mapping mode, it may be determined according to a standard predefined uplink subcarrier mapping manner, or may be determined according to an internal algorithm. For example, the terminal determines the correspondence between the frequency band and the uplink subcarrier mapping manner.
- An implementation manner is that the low frequency band (such as the 800 MHz frequency band) corresponds to the first mapping mode, and the high frequency band (such as the 3.5 GHz frequency band) corresponds to the second mapping mode, and the terminal can determine the uplink uplink carrier mapping mode according to the actual communication frequency band.
- the terminal may also determine the uplink subcarrier mapping mode by receiving configuration information sent by the base station. The configuration information indicates that the terminal adopts the first mapping manner or the second mapping manner.
- the boundary of the uplink subcarrier corresponding to the first mapping mode and the subcarrier demarcation point of the absolute frequency have a frequency offset of a half subcarrier, and the boundary and the absolute frequency of the uplink subcarrier corresponding to the second mapping mode.
- the subcarrier demarcation points are aligned.
- 12 is a schematic diagram of a first mapping mode and a second mapping mode. As shown in FIG. 12, subcarriers in the frequency domain have subcarrier demarcation points, which may be referred to as subcarrier demarcation points of absolute frequencies. These demarcation points can be thought of as some fixed frequency points in the frequency domain.
- the boundary of the subcarrier corresponding to the first mapping mode has a frequency offset of half of the subcarriers from these demarcation points (it may also be considered as a frequency offset of (N+1/2) subcarriers, and N is an integer).
- the subcarriers corresponding to the second mapping mode are aligned with the demarcation points.
- Step 1302 The terminal sends an uplink signal according to the uplink subcarrier mapping manner.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the IFFT point (for example, equal to 2048 or 4096 or other values, etc.)
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing (for example, equal to 15KHz or 30KHz, etc.)
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index
- l represents the time domain symbol index
- N CP l represents the cyclic prefix (CP) length on the symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sample point.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the IFFT point (for example, equal to 2048 or 4096 or other values, etc.)
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing (for example, equal to 15KHz or 30KHz, etc.)
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index
- l represents the time domain symbol index
- N CP l represents the cyclic prefix (CP) length on the symbol l
- the uplink subcarrier and the downlink subcarrier are aligned in the subcarrier frequency division, or the subcarrier frequency boundary in the uplink subcarrier and the subcarrier division manner is aligned.
- the subcarrier mapping mode can be differently adapted in different scenarios, such as the scenario where the NR system shares the uplink carrier with the LTE, and the NR system is not shared with the LTE or the flexible duplex of the NR system. To solve the problem of interference between subcarriers.
- the embodiment of the present application provides a base station, including:
- a determining module configured to determine an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner, where the uplink subcarrier and the downlink subcarrier corresponding to the first mapping manner have a half sub The frequency domain offset of the carrier, the uplink subcarrier corresponding to the second mapping mode and the downlink subcarrier are aligned in the frequency domain; the downlink carrier where the downlink subcarrier is located and the uplink carrier where the uplink subcarrier is located are Pairs;
- the receiving module is configured to receive an uplink signal according to the uplink subcarrier mapping manner.
- the uplink signal is the first mapping mode
- N SC uplink signal of the UE is currently occupied by a number of sub-carriers in the frequency domain
- the sub-carrier spacing [Delta] f a k
- a signal value representative of the time-frequency resource units l k representative of the frequency domain subcarrier index
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the number of IFFT points
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index.
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the embodiment of the present application provides a terminal, including:
- a determining module configured to determine an uplink subcarrier mapping manner, where the uplink subcarrier mapping manner includes a first mapping manner and a second mapping manner, where the uplink subcarrier and the downlink subcarrier corresponding to the first mapping manner have a half sub The frequency domain offset of the carrier, the uplink subcarrier corresponding to the second mapping mode and the downlink subcarrier are aligned in the frequency domain; the downlink carrier where the downlink subcarrier is located and the uplink carrier where the uplink subcarrier is located are Pairs;
- a sending module configured to send an uplink signal according to the uplink subcarrier mapping manner.
- the uplink signal is the first mapping mode
- N is the number of IFFT points
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index.
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the uplink signal is the uplink subcarrier mapping mode.
- N is the number of IFFT points
- N SC is the number of frequency domain subcarriers occupied by the current uplink signal of the UE
- ⁇ f is the subcarrier spacing
- a k l represents the signal value of the time-frequency resource unit
- k represents the frequency domain subcarrier index.
- l represents the time domain symbol index
- N CP, l represents the cyclic prefix length on symbol l
- T s 1 / ( ⁇ f ⁇ N) represents the length of the time domain sampling point.
- the steps of a method or algorithm described in connection with the present disclosure may be implemented in a hardware or may be implemented by a processor executing software instructions.
- the software instructions may be comprised of corresponding software modules that may be stored in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable hard disk, CD-ROM, or any other form of storage well known in the art.
- An exemplary storage medium is coupled to the processor to enable the processor to read information from, and write information to, the storage medium.
- the storage medium can also be an integral part of the processor.
- the processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in the user equipment.
- the processor and the storage medium may also reside as discrete components in the user equipment.
- the computer program product includes one or more computer instructions.
- the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
- the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transfer to another website site, computer, server, or data center by wire (eg, coaxial cable, fiber optic, digital subscriber line (DSL), or wireless (eg, infrared, wireless, microwave, etc.).
- the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device such as a server, data center, or the like that includes one or more available media.
- the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)).
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Abstract
Description
指示信息 | 含义 |
0 | 子载波映射不进行频率偏移 |
1 | 子载波映射进行频率偏移-7.5KHz |
2 | 子载波映射进行频率偏移+7.5KHz |
F DL_low(单位:MHz) | N Offs-DL | N DL的取值范围 |
2110 | 0 | 0–599 |
1930 | 600 | 600–1199 |
1805 | 1200 | 1200–1949 |
2110 | 1950 | 1950–2399 |
869 | 2400 | 2400–2649 |
875 | 2650 | 2650–2749 |
第二偏移值 | 含义 |
0 | 0 |
1 | 100KHz |
2 | -100KHz |
总偏移值 | 含义 |
0 | 0 |
1 | +7.5KHz |
2 | 100KHz+7.5KHz |
3 | -100KHz+7.5KHz |
总偏移值 | 含义 |
0 | 0 |
1 | -7.5KHz |
2 | 100KHz-7.5KHz |
3 | -100KHz-7.5KHz |
第二偏移值 | 含义(单位:KHz) |
0 | 0 |
1 | 20 |
2 | -20 |
3 | 40 |
4 | -40 |
5 | 60 |
6 | -60 |
7 | 80 |
8 | -80 |
总偏移值 | 含义 |
0 | 0 |
1 | +7.5KHz |
2 | 20+7.5KHz |
3 | -20+7.5KHz |
4 | 40+7.5KHz |
5 | -40+7.5KHz |
6 | 60+7.5KHz |
7 | -60+7.5KHz |
8 | 80+7.5KHz |
9 | -80+7.5KHz |
总偏移值 | 含义 |
0 | 0 |
1 | -7.5KHz |
2 | 20-7.5KHz |
3 | -20-7.5KHz |
4 | 40-7.5KHz |
5 | -40-7.5KHz |
6 | 60-7.5KHz |
7 | -60-7.5KHz |
8 | 80-7.5KHz |
9 | -80-7.5KHz |
Claims (42)
- 一种发送载波信息的方法,其特征在于,包括:基站根据第一子载波映射方式对第一载波进行子载波映射,其中,所述第一子载波映射方式对应的子载波相对于第二子载波映射方式对应的子载波有第一偏移值的频率偏移,所述第二子载波映射方式对应的子载波关于所述第一载波的载波中心频率对称且在所述第一载波的载波中心频率上没有子载波;所述基站向终端发送指示信息,所述指示信息携带所述第一偏移值的信息。
- 根据权利要求1所述的方法,其特征在于,所述第一偏移值的信息包括第一值或第二值;其中,所述第一值表示所述第一偏移值为0;所述第二值表示所述第一偏移值为+7.5KHz,或者所述第二值表示所述第一偏移值为-7.5KHz。
- 根据权利要求2所述的方法,其特征在于,所述指示信息还携带第二偏移值的信息,所述第二偏移值的信息所指示的第二偏移值满足公式X-floor(X/Raster+0.5)*Raster,或者满足公式X-floor(X/Raster)*Raster;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格。
- 根据权利要求1所述的方法,其特征在于,所述第一偏移值的信息所指示的第一偏移值满足以下公式中的任一个:X-floor(X/Raster+0.5)*Raster+7.5KHz、X-floor(X/Raster+0.5)*Raster-7.5KHz、X-floor(X/Raster)*Raster+7.5KHz、或X-floor(X/Raster)*Raster-7.5KHz;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格。
- 根据权利要求1-4任一项所述的方法,其特征在于,包括:所述第一载波为第一通信模式和第二通信模式共享的下行载波;所述第一通信模式的子载波映射方式为所述第一子载波映射方式;所述第二通信模式的子载波映射方式为所述第二子载波映射方式。
- 根据权利要求1-5任一项所述的方法,其特征在于,所述指示信息还包括:所述第一载波的演进的通用陆面无线接入绝对无线频道号EARFCN。
- 一种确定子载波的方法,其特征在于,包括:终端从基站接收指示信息,其中,所述指示信息携带第一偏移值的信息,所述第一偏移值为第一子载波映射方式对应的子载波相对于第二子载波映射方式对应的子载波的频率偏移,所述第二子载波映射方式对应的子载波关于第一载波的载波中心频率对称且在所述第一载波的载波中心频率上没有子载波;所述终端根据所述指示信息、所述第二子载波映射方式以及所述第一载波的载波中心频率,确定所述第一载波的一个或多个子载波的频率位置。
- 根据权利要求7所述的方法,其特征在于,所述第一偏移值的信息包括第一值或第二值;其中,所述第一值表示所述第一偏移值为0;所述第二值表示所述第一偏移值为+7.5KHz,或者所述第二值表示所述第一偏移值为-7.5KHz。
- 根据权利要求8所述的方法,其特征在于,所述指示信息还携带第二偏移值的信息,所述第二偏移值的信息所指示的第二偏移值满足公式X-floor(X/Raster+0.5)*Raster,或者满足公式X-floor(X/Raster)*Raster;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格;所述方法还包括根据所述第二偏移值以及第一频率得到第一载波的载波中心频率,所述第一频率为所述终端根据EARFCN获得。
- 根据权利要求7所述的方法,其特征在于,所述第一偏移值的信息所指示的第一偏移值满足以下公式中的任一个:X-floor(X/Raster+0.5)*Raster+7.5KHz、X-floor(X/Raster+0.5)*Raster-7.5KHz、X-floor(X/Raster)*Raster+7.5KHz、或X-floor(X/Raster)*Raster-7.5KHz;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格。
- 根据权利要求7-10任一项所述的方法,其特征在于,包括:所述第一载波为第一通信模式和第二通信模式共享的下行载波;所述第一通信模式的子载波映射方式为所述第一子载波映射方式;所述第二通信模式的子载波映射方式为所述第二子载波映射方式。
- 根据权利要求7-11任一项所述的方法,其特征在于,所述指示信息还包括:所述第一载波的演进的通用陆面无线接入绝对无线频道号EARFCN;所述方法还包括:所述终端根据所述EARFCN获得所述第一载波的载波中心频率。
- 一种基站,其特征在于,包括:处理器,用于根据第一子载波映射方式对第一载波进行子载波映射,其中,所述第一子载波映射方式对应的子载波相对于第二子载波映射方式对应的子载波有第一偏移值的频率偏移,所述第二子载波映射方式对应的子载波关于所述第一载波的载波中心频率对称且在所述第一载波的载波中心频率上没有子载波;收发器,用于向终端发送指示信息,所述指示信息携带所述第一偏移值的信息。
- 根据权利要求13所述的基站,其特征在于,所述第一偏移值的信息包括第一值或第二值;其中,所述第一值表示所述第一偏移值为0;所述第二值表示所述第一偏移值为+7.5KHz,或者所述第二值表示所述第一偏移值为-7.5KHz。
- 根据权利要求14所述的基站,其特征在于,所述指示信息还携带第二偏移值的信息,所述第二偏移值的信息所指示的第二偏移值满足公式X-floor(X/Raster+0.5)*Raster,或者满足公式X-floor(X/Raster)*Raster;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格。
- 根据权利要求13所述的基站,其特征在于,所述第一偏移值的信息所指示的第一偏移值满足以下公式中的任一个:X-floor(X/Raster+0.5)*Raster+7.5KHz、X-floor(X/Raster+0.5)*Raster-7.5KHz、X-floor(X/Raster)*Raster+7.5KHz、或X-floor(X/Raster)*Raster-7.5KHz;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格。
- 根据权利要求13-16任一项所述的基站,其特征在于,包括:所述第一载波为第一通信模式和第二通信模式共享的下行载波;所述第一通信模式的子载波映射方式为所述第一子载波映射方式;所述第二通信模式的子载波映射方式为所述第二子载波映射方式。
- 根据权利要求13-17任一项所述的基站,其特征在于,所述指示信息还包括:所述第一载波的演进的通用陆面无线接入绝对无线频道号EARFCN。
- 一种终端,其特征在于,包括:收发器,用于从基站接收指示信息,其中,所述指示信息携带第一偏移值的信息,所述第一偏移值为第一子载波映射方式对应的子载波相对于第二子载波映射方式对应的子载波的频率偏移,所述第二子载波映射方式对应的子载波关于第一载波的载波中心频率对称且在所述第一载波的载波中心频率上没有子载波;处理器,用于根据所述指示信息、所述第二子载波映射方式以及所述第一载波的载波中心频率,确定所述第一载波的一个或多个子载波的频率位置。
- 根据权利要求19所述的终端,其特征在于,所述第一偏移值的信息包括第一值或第二值;其中,所述第一值表示所述第一偏移值为0;所述第二值表示所述第一偏移值为+7.5KHz,或者所述第二值表示所述第一偏移值为-7.5KHz。
- 根据权利要求20所述的终端,其特征在于,所述指示信息还携带第二偏移值的信息,所述第二偏移值的信息所指示的第二偏移 值满足公式X-floor(X/Raster+0.5)*Raster,或者满足公式X-floor(X/Raster)*Raster;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格。
- 根据权利要求19所述的终端,其特征在于,所述第一偏移值的信息所指示的第一偏移值满足以下公式中的任一个:X-floor(X/Raster+0.5)*Raster+7.5KHz、X-floor(X/Raster+0.5)*Raster-7.5KHz、X-floor(X/Raster)*Raster+7.5KHz、或X-floor(X/Raster)*Raster-7.5KHz;其中,floor( )表示向下取整,X为100KHz的整数倍,且X的取值范围为从0到(Y-100)KHz,其中Y为100KHz与Raster的公倍数,Raster为信道栅格的值,所述信道栅格为所述第二子载波映射方式对应的通信模式所采用的信道栅格。
- 根据权利要求19-22任一项所述的终端,其特征在于,包括:所述第一载波为第一通信模式和第二通信模式共享的下行载波;所述第一通信模式的子载波映射方式为所述第一子载波映射方式;所述第二通信模式的子载波映射方式为所述第二子载波映射方式。
- 根据权利要求19-23任一项所述的终端,其特征在于,所述指示信息还包括:所述第一载波的演进的通用陆面无线接入绝对无线频道号EARFCN;所述处理器还用于根据所述EARFCN获得所述第一载波的载波中心频率。
- 一种基站,其特征在于,包括:确定模块,用于确定上行子载波映射方式,其中,所述上行子载波映射方式包括第一映射方式和第二映射方式,所述第一映射方式对应的上行子载波与下行子载波存在半个子载波的频域偏移,所述第二映射方式对应的上行子载波与下行子载波在频域上是对齐的;所述下行子载波所在的下行载波与所述上行子载波所在的上行载波是成对的;接收模块,用于根据所述上行子载波映射方式接收上行信号。
- 一种终端,其特征在于,包括:确定模块,用于确定上行子载波映射方式,其中,所述上行子载波映射方式包括第一映射方式和第二映射方式,所述第一映射方式对应的上行子载波与下行子载波存在半个子载波的频域偏移,所述第二映射方式对应的上行子载波与下行子载波在频域上是对齐的;所述下行子载波所在的下行载波与所述上行子载波所在的上行载波是成对的;发送模块,用于根据所述上行子载波映射方式发送上行信号。
- 一种接收载波信息的方法,其特征在于,包括:终端从基站接收指示信息,所述指示信息携带第一偏移值的信息,所述第一偏移值包括0kHz或7.5kHz;所述终端根据绝对无线频道号和所述第一偏移值,获取第一载波的实际载波中心频率。
- 根据权利要求31所述的方法,其特征在于,所述第一载波是上行载波。
- 根据权利要求31或32所述的方法,其特征在于,所述获取第一载波的实际载波中心频率包括获取第一载波按照第二子载波映射方式进行子载波映射时的实际载波中心频率,其中,所述第二子载波映射方式对应的子载 波关于所述第一载波的载波中心频率对称且在所述第一载波的载波中心频率上没有子载波。
- 根据权利要求33所述的方法,其特征在于,所述第一载波的载波中心频率是根据所述绝对无线频道号得到的。
- 一种发送载波信息的方法,其特征在于,包括:基站向终端发送指示信息,所述指示信息携带第一偏移值的信息,所述第一偏移值包括0kHz或7.5kHz,以使得所述终端根据绝对无线频道号和所述第一偏移值,获取第一载波的实际载波中心频率。
- 根据权利要求35所述的方法,其特征在于,所述第一载波是上行载波。
- 一种终端,其特征在于,包括:收发器,用于从基站接收指示信息,所述指示信息携带第一偏移值的信息,所述第一偏移值包括0kHz或7.5kHz;处理器,用于根据绝对无线频道号和所述第一偏移值,获取第一载波的实际载波中心频率。
- 根据权利要求37所述的终端,其特征在于,所述第一载波是上行载波。
- 根据权利要求37或38所述的终端,其特征在于,所述处理器具体用于获取第一载波按照第二子载波映射方式进行子载波映射时的实际载波中心频率,其中,所述第二子载波映射方式对应的子载波关于所述第一载波的载波中心频率对称且在所述第一载波的载波中心频率上没有子载波。
- 根据权利要求39所述的终端,其特征在于,所述第一载波的载波中心频率是根据所述绝对无线频道号得到的。
- 一种基站,其特征在于,包括:收发器,用于向终端发送指示信息,所述指示信息携带第一偏移值的信息,所述第一偏移值包括0kHz或7.5kHz,以使得所述终端根据绝对无线频道号和所述第一偏移值,获取第一载波的实际载波中心频率。
- 根据权利要求41所述的基站,其特征在于,所述第一载波是上行载波。
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