WO2017107712A1 - 信息的发送方法及装置 - Google Patents

信息的发送方法及装置 Download PDF

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Publication number
WO2017107712A1
WO2017107712A1 PCT/CN2016/106423 CN2016106423W WO2017107712A1 WO 2017107712 A1 WO2017107712 A1 WO 2017107712A1 CN 2016106423 W CN2016106423 W CN 2016106423W WO 2017107712 A1 WO2017107712 A1 WO 2017107712A1
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Prior art keywords
symbol
modulation
modulation symbol
ofdm symbol
resource set
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PCT/CN2016/106423
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English (en)
French (fr)
Inventor
夏树强
张雯
梁春丽
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中兴通讯股份有限公司
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Publication of WO2017107712A1 publication Critical patent/WO2017107712A1/zh

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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
    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • 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
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]

Definitions

  • the present invention relates to the field of communications, and in particular to a method and apparatus for transmitting information.
  • Machine Type Communication MTC
  • UE User Equipment
  • M2M Machine to Machine
  • C-IOT Comb-Internet Of Things
  • 3GPP 3rd Generation Partnership Project
  • TR45.820V200 Technical Report TR45.820V200
  • NB-LTE Narrow Bang-Long Term Evolution
  • the system bandwidth of the system is 200 kHz, which is the same as the channel bandwidth of the Global System for Mobile Communication (GSM) GSM system. This is the NB-LTE system reuses the GSM spectrum and reduces the mutual interference between the adjacent and GSM channels.
  • GSM Global System for Mobile Communication
  • the transmission bandwidth and the downlink subcarrier spacing of the NB-LTE are 180 kHz and 15 kHz, respectively, and the bandwidth and the sub-band of the Physical Resource Block (PRB) of the Long-Term Evolution (LTE) system, respectively.
  • the carrier spacing is the same.
  • PSS primary synchronization signal
  • SSS Secondary Synchronization Signal
  • Physical broadcast channel Physical Broadcast Chanel
  • the embodiment of the invention provides a method and a device for transmitting information, so as to at least solve the problem of unreasonable design of a reference signal applied to the NB-LTE system in the related art.
  • a method for transmitting information including:
  • the locations of the first resource set and the second resource set in the OFDM symbol are predefined position.
  • an index of the OFDM symbol including the reference signal is taken from a set ⁇ 0, 1, 4 ⁇ , and the OFDM does not include a reference signal
  • the index of the symbol is taken from the set ⁇ 2, 3, 5, 6 ⁇ ;
  • the index of the OFDM symbol including the reference signal is taken from the set ⁇ 0, 1, 3 ⁇
  • the index of the OFDM symbol not including the reference signal is from the set
  • the value in ⁇ 2, 4, 5 ⁇ where the OFDM symbol is an OFDM symbol in an LTE system, and in a conventional CP, an OFDM symbol in the LTE system is indexed from a set ⁇ 0 in one slot.
  • the number of modulation symbols mapped in the first resource set is not greater than the number of modulation symbols mapped in the second resource set.
  • the modulation symbol is a modulation symbol after differential modulation
  • the reference modulation symbol of the modulation symbol is a preset modulation symbol, or the reference modulation symbol of the modulation symbol is a modulation symbol mapped in the second resource set.
  • At least one of the plurality of modulation symbols is a modulation symbol mapped to the RE in the first resource set.
  • the information is encoded and rate matched prior to the differential modulation.
  • the reference modulation symbol of the modulation symbol is a resource-mapped modulation symbol that is closest to a resource mapped by the modulation symbol, where the one modulation symbol is a modulation symbol mapped in the second resource set.
  • the reference modulation symbol of the modulation symbol is one of a plurality of modulation symbols mapped on a plurality of resources closest to a resource mapped by the modulation symbol, wherein a modulation symbol in the plurality of modulation symbols is mapped Modulation symbols in the second set of resources.
  • the information includes at least one of the following:
  • Synchronization information main information block MIB, system information block SIB, downlink control information, and downlink data.
  • a method for receiving information including:
  • mapping relationship between the modulation symbol and the resource set is obtained by: mapping the modulation symbol to a first manner according to a preset manner. And a second set of resources, where the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is an OFDM symbol including a reference signal, and the second resource set
  • the OFDM symbol corresponding to the RE is an OFDM symbol that does not include a reference signal.
  • the locations of the first resource set and the second resource set in the OFDM symbol are predefined locations.
  • an index of the OFDM symbol including the reference signal is taken from a set ⁇ 0, 1, 4 ⁇ , and the OFDM does not include a reference signal
  • the index of the symbol is taken from the set ⁇ 2, 3, 5, 6 ⁇ ;
  • the index of the OFDM symbol including the reference signal is taken from the set ⁇ 0, 1, 3 ⁇
  • the index of the OFDM symbol not including the reference signal is from the set
  • the value in ⁇ 2, 4, 5 ⁇ where the OFDM symbol is an OFDM symbol in an LTE system, and in a conventional CP, an OFDM symbol in the LTE system is indexed from a set ⁇ 0 in one slot.
  • the number of modulation symbols mapped in the first resource set is not greater than the number of modulation symbols mapped in the second resource set.
  • the modulation symbol is a modulation symbol after differential modulation
  • the reference modulation symbol of the modulation symbol is a preset modulation symbol, or the reference modulation symbol of the modulation symbol is a modulation symbol mapped in the second resource set.
  • At least one of the plurality of modulation symbols is a modulation symbol mapped to the RE in the first resource set.
  • the information is encoded and rate matched prior to the differential modulation.
  • the reference modulation symbol of the modulation symbol is a resource-mapped modulation symbol that is closest to a resource mapped by the modulation symbol, where the one modulation symbol is a modulation symbol mapped in the second resource set.
  • the reference modulation symbol of the modulation symbol is one of a plurality of modulation symbols mapped on a plurality of resources closest to a resource mapped by the modulation symbol, wherein a modulation symbol in the plurality of modulation symbols is mapped Modulation symbols in the second set of resources.
  • the information includes at least one of the following:
  • Synchronization information main information block MIB, system information block SIB, downlink control information, and downlink data.
  • an information sending apparatus including:
  • a sending module configured to send the modulation symbol on a resource set corresponding to the modulation symbol that sends the information, where the mapping relationship between the modulation symbol and the resource set is obtained by: presetting the modulation symbol according to a preset The mode is mapped to the first resource set and the second resource set, where the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is an OFDM symbol including a reference signal, and the The OFDM symbol corresponding to the RE in the two resource sets is an OFDM symbol that does not include a reference signal.
  • a device for receiving information including:
  • the receiving module is configured to receive the modulation symbol on a resource set corresponding to the modulation symbol of the received information, where the mapping relationship between the modulation symbol and the resource set is obtained by: presetting the modulation symbol according to a preset the way Mapping on the first resource set and the second resource set, where the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is an OFDM symbol including a reference signal, and the second The OFDM symbol corresponding to the RE in the resource set is an OFDM symbol that does not include a reference signal.
  • a computer storage medium is further provided, and the computer storage medium may store an execution instruction for performing the implementation of the method for receiving information in the foregoing embodiment.
  • the modulation symbol is transmitted in a resource set corresponding to the modulation symbol of the information to be transmitted, where the mapping relationship between the modulation symbol and the resource set is obtained by: mapping the modulation symbol according to a preset manner. a set of resources and a second set of resources, wherein the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is an OFDM symbol including a reference signal, and an RE in the second resource set
  • the corresponding OFDM symbol is an OFDM symbol that does not include a reference signal, which solves the problem of unreasonable design of the reference signal applied to the NB-LTE system, and improves the stability of the NB-LTE system.
  • FIG. 1 is a flowchart of a method for transmitting information according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a method for receiving information according to an embodiment of the present invention
  • FIG. 3 is a structural block diagram of an apparatus for transmitting information according to an embodiment of the present invention.
  • FIG. 4 is a structural block diagram of an apparatus for receiving information according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an RE reference modulation symbol provided according to a preferred embodiment of the present invention.
  • FIG. 7 is a schematic diagram of RE reference symbol mapping on a CRS symbol according to a preferred embodiment 2 of the present invention.
  • FIG. 8 is a schematic diagram of adjacent RE reference modulation symbols of an RE according to a preferred embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for sending information according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:
  • Step S102 The modulation symbols are mapped to the first resource set and the second resource set according to a preset manner, where the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is a reference signal.
  • OFDM symbol, the OFDM symbol corresponding to the RE in the second resource set is an OFDM symbol that does not include a reference signal;
  • Step S104 The modulation symbol is sent on a resource set corresponding to the modulation symbol of the transmission information, where the mapping relationship between the modulation symbol and the resource set is obtained in the following manner.
  • the mapping relationship between the modulation symbol and the resource set is obtained by: mapping the modulation symbol to the first manner according to a preset manner.
  • the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is an OFDM symbol including a reference signal, and corresponds to the RE in the second resource set.
  • the OFDM symbol is an OFDM symbol that does not include a reference signal, which solves the problem of unreasonable design of a reference signal applied to the NB-LTE system, and improves the stability of the NB-LTE system.
  • the first resource set and the second resource set are in a predefined location at the location of the OFDM symbol.
  • the index of the OFDM symbol including the reference signal is taken from the set ⁇ 0, 1, 4 ⁇ , and the OFDM does not include the reference signal.
  • the index of the symbol is taken from the set ⁇ 2, 3, 5, 6 ⁇ ;
  • the index of the OFDM symbol including the reference signal is taken from the set ⁇ 0, 1, 3 ⁇ , and the index of the OFDM symbol not including the reference signal is from the set ⁇ 2,
  • the value of 4, 5 ⁇ where the OFDM symbol is an OFDM symbol in an LTE system, and the index of the OFDM symbol in the LTE system in a slot from the set ⁇ 0, 1, 2, 3 under a conventional CP
  • the index of the OFDM symbol in the LTE system in one slot is taken from the set ⁇ 0, 1, 2, 3, 4, 5 ⁇ .
  • the number of modulation symbols mapped in the first resource set is not greater than the number of modulation symbols mapped in the second resource set.
  • the modulation symbol is a modulation symbol after differential modulation
  • the reference modulation symbol of the modulation symbol is a preset modulation symbol, or the reference modulation symbol of the modulation symbol is a modulation symbol mapped in the second resource set.
  • At least one of the plurality of modulation symbols is a modulation symbol mapped to the RE in the first resource set.
  • the information is encoded and rate matched prior to the differential modulation.
  • the reference modulation symbol of the modulation symbol is a resource-mapped modulation symbol that is closest to the resource mapped by the modulation symbol, where the one modulation symbol is a modulation symbol mapped in the second resource set,
  • the reference modulation symbol of the modulation symbol is one of a plurality of modulation symbols mapped on a plurality of resources that are closest to a resource mapped by the modulation symbol, where a modulation symbol of the plurality of modulation symbols is mapped to the second resource. Modulation symbols in the set.
  • the information includes at least one of the following:
  • Synchronization information main information block MIB, system information block SIB, downlink control information, and downlink data.
  • FIG. 2 is a flowchart of a method for receiving information according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:
  • Step S202 The modulation symbols are mapped on the first resource set and the second resource set according to a preset manner, where the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is a reference signal.
  • OFDM symbol, the OFDM symbol corresponding to the RE in the second resource set is an OFDM symbol that does not include a reference signal;
  • Step S204 Receive the modulation symbol on a resource set corresponding to the modulation symbol of the received information, where the mapping relationship between the modulation symbol and the resource set is obtained in the following manner.
  • the mapping relationship between the modulation symbol and the resource set is obtained by: mapping the modulation symbol to the first manner according to a preset manner.
  • the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is an OFDM symbol including a reference signal, and corresponds to the RE in the second resource set.
  • the OFDM symbol is an OFDM symbol that does not include a reference signal, which solves the problem of unreasonable design of a reference signal applied to the NB-LTE system, and improves the stability of the NB-LTE system.
  • the first resource set and the second resource set are in a predefined location at the location of the OFDM symbol.
  • the index of the OFDM symbol including the reference signal is taken from the set ⁇ 0, 1, 4 ⁇ , and the OFDM does not include the reference signal.
  • the index of the symbol is taken from the set ⁇ 2, 3, 5, 6 ⁇ ;
  • the index of the OFDM symbol including the reference signal is taken from the set ⁇ 0, 1, 3 ⁇ , and the index of the OFDM symbol not including the reference signal is from the set ⁇ 2,
  • the value of 4, 5 ⁇ where the OFDM symbol is an OFDM symbol in an LTE system, and the index of the OFDM symbol in the LTE system in a slot from the set ⁇ 0, 1, 2, 3 under a conventional CP
  • the index of the OFDM symbol in the LTE system in one slot is taken from the set ⁇ 0, 1, 2, 3, 4, 5 ⁇ .
  • the number of modulation symbols mapped in the first resource set is not greater than the number of modulation symbols mapped in the second resource set.
  • the modulation symbol is a modulation symbol after differential modulation
  • the reference modulation symbol of the modulation symbol is a preset modulation symbol, or the reference modulation symbol of the modulation symbol is a modulation symbol mapped in the second resource set.
  • At least one of the plurality of modulation symbols is a modulation symbol mapped to the RE in the first resource set.
  • the information is encoded and rate matched prior to the differential modulation.
  • the reference modulation symbol of the modulation symbol is a resource-mapped modulation symbol that is closest to the resource mapped by the modulation symbol, where the one modulation symbol is a modulation symbol mapped in the second resource set,
  • the reference modulation symbol of the modulation symbol is one of a plurality of modulation symbols mapped on a plurality of resources that are closest to a resource mapped by the modulation symbol, where a modulation symbol of the plurality of modulation symbols is mapped to the second resource. Modulation symbols in the set.
  • the information includes at least one of the following:
  • Synchronization information main information block MIB, system information block SIB, downlink control information, and downlink data.
  • a device for transmitting information is provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 3 is a structural block diagram of an apparatus for transmitting information according to an embodiment of the present invention. As shown in FIG. 3, the apparatus includes:
  • the first mapping module 32 is configured to map the modulation symbols on the first resource set and the second resource set according to a preset manner, where the orthogonal frequency division multiplexing OFDM corresponding to the resource unit RE in the first resource set
  • the symbol is an OFDM symbol including a reference signal
  • the OFDM symbol corresponding to the RE in the second resource set is an OFDM symbol that does not include a reference signal
  • the sending module 34 is connected to the first mapping module 32 and configured to transmit the modulation symbol in a resource set corresponding to the modulation symbol of the transmission information.
  • FIG. 4 is a structural block diagram of an apparatus for receiving information according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes:
  • the second mapping module 42 is configured to map the modulation symbol on the first resource set and the second resource set according to a preset manner, where the orthogonal frequency division multiplexing corresponding to the resource unit RE in the first resource set
  • An OFDM symbol is an OFDM symbol including a reference signal
  • an OFDM symbol corresponding to an RE in the second resource set is an OFDM symbol not including a reference signal
  • the receiving module 44 is connected to the second mapping module 42 and configured to receive the modulation symbol in a resource set corresponding to the modulation symbol of the received information.
  • the mapping relationship between the modulation symbol and the resource set is obtained in the following manner.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • a preferred embodiment of the present invention provides a method of transmitting information.
  • the information to be transmitted may be synchronization information, or a Master Information Block (MIB), or a System Information Block (SIB), or downlink control information, or downlink data.
  • the downlink control information is transmitted on the downlink control channel, and the downlink control channel includes the physical downlink control channel (Physical Downlink Control Channel, PDCCH for short) and the Enhanced Physical Downlink Control Channel (EPDCCH).
  • the data is transmitted on a Physical Downlink Shared Channel (PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • the transmitted information uses differential modulation.
  • differential modulation can be used without demodulation of the reference signal.
  • the decoding performance is better than the sequence-related performance.
  • the user equipment User Equipment, UE for short
  • Cell-specific RS Cell-specific RS, referred to as For MIB/SIB demodulation for CRS
  • differential modulation is a better solution.
  • the downlink control information or the downlink data in the NB-LTE system, if it is an inband inband scenario, if the UE does not obtain the value of the CRS sequence, the downlink control information or the downlink data may also be transmitted by using a differential, and the differential transmission does not need to be referenced.
  • the signal can be demodulated.
  • modulation symbol B is referred to as a reference modulation signal of modulation symbol A.
  • the reference modulation symbol B is a n
  • A is equal to a n
  • the binary bit “1” is indicated; if A is equal to ⁇ a n , the binary bit “0” is indicated.
  • each modulation symbol is only One reference modulation symbol, but the reference symbols of multiple modulation symbols may be the same.
  • the modulation symbols for transmitting the information are divided into two sets, which are respectively mapped to two resource sets, that is, a first resource set and a second resource set, and an OFDM corresponding to the RE in the first resource set
  • the Orthogonal Frequency Division Multiplexing (OFDM) symbol is an OFDM symbol including a reference signal
  • the OFDM symbol corresponding to the RE in the second resource set is an OFDM symbol that does not include a reference signal.
  • the locations of the first resource set and the second resource set are preset.
  • the relationship between two resource sets is before and after time, for example, the set 1 is before the time of the set 2, or the two are cross-times, for example, occupying 5 OFDM symbols in total, and the set 1 occupies the 2nd, 3rd, and 4th symbols.
  • Set 2 occupies the first and fifth symbols, or set 1 occupies the even symbol, and set 2 occupies the odd symbol.
  • the number of modulation symbols in the two sets may or may not be equal.
  • the reference modulation symbol of the modulation symbol is a preset modulation symbol or a modulation symbol mapped in the second resource set. In this way, reception errors due to the cancellation of the synchronization signal by the CRS can be avoided.
  • the number of modulation symbols mapped in the first set of resources is less than or equal to the number of modulation symbols mapped in the second set of resources.
  • S 1 ⁇ a 1 , a 2 , a 3 , a 4 ⁇
  • S 2 ⁇ b 1 ,b 2 ,b 3 ⁇
  • the modulation symbols in S 1 are mapped on the RE corresponding to the symbol without CRS
  • B ⁇ A indicates that B is the reference modulation symbol of A, where the reference modulation symbol of a1 can be pre- Modulation symbol.
  • the modulation symbol is a modulation symbol mapped on the RE in the first set of resources.
  • the reference modulation symbols of a3 and b1 are both a2, where b1 is the modulation symbol mapped on the RE in the first resource set.
  • the reference modulation symbol of each modulation symbol should be a modulation symbol on a resource closest to itself, or one of the modulation symbols on several resources closest to itself. Because the channel conditions on the two resources that are closer are similar, the effect of the channel can be removed through differential processing.
  • FIG. 6 is a schematic diagram of an RE reference modulation symbol according to a preferred embodiment of the present invention. As shown in FIG. 6, one grid represents one RE, and the white portion has no CRS on the OFDM symbol.
  • the reference modulation symbols of the modulation symbols are all selected from the RE of the white portion. For example, the RE closest to RE#3 is RE#1 and RE#5, so the modulation symbol on one of RE#1 is selected as the RE#3.
  • the reference modulation symbol of the modulation symbol is provided.
  • a preferred embodiment 2 of the present invention gives an example of transmitting synchronization signal/synchronization information.
  • the MIB/SIB or downlink control information or downlink data is transmitted in a similar manner.
  • the synchronization signal includes N bits of synchronization information, and the synchronization information includes at least one of the following:
  • Cell identification information for example, 504 cell identifiers are represented by 9 bits;
  • TDD/FDD indication information such as 1 bit
  • the operation mode information such as the standalone scenario, or the inband inband scenario, or the guardband-band scenario, such as 2bit indication or 1bit indication, such as using two states other than inband.
  • Timing information such as the synchronization signal is sent every 20ms, with 2bit indicating which 20ms within 80ms.
  • the resource occupied by the synchronization signal is a number of symbols in one subframe, including the symbol in which the CRS is located and the symbol without the CRS. That is, the two resource sets described in the first embodiment.
  • the chronological index of symbols in one slot is 0, 1, ..., 6, respectively.
  • the index of the symbol that may have CRS belongs to the set ⁇ 0, 1, 4 ⁇ , and the remaining symbols are symbols without CRS.
  • the chronological index of the symbols in one slot is 0, 1, ..., 5, respectively.
  • the index of the symbol of the CRS may belong to the set ⁇ 0, 1, 3 ⁇ , and the remaining symbols are the symbols without CRS. .
  • the synchronization signal is the last 9 symbols in one subframe in the time domain, and all subcarriers in the frequency domain.
  • the synchronization signal is cancelled to avoid affecting other UEs to receive the CRS.
  • the N bits of the synchronization signal are encoded by an encoder, and the encoder may be a convolutional encoder or an RM code encoder.
  • the present invention does not limit the encoder. In practical applications, an encoding may be arbitrarily selected.
  • Device For example, a convolutional code of 1/3 code rate is used, and the coded data is rate-matched by a number of bits according to the number of REs occupied by the synchronization signal and the modulation mode (such as BPSK or QPSK). The bit is then differentially modulated, and finally the differentially modulated modulation symbols are mapped into the RE.
  • the reference modulation symbol For a modulation symbol mapped to a synchronization signal on a symbol on which the CRS is located, the reference modulation symbol should be a modulation symbol mapped to a synchronization signal on a symbol other than the CRS.
  • Its reference modulation symbol shall be other modulation symbols mapped to the synchronization signal on symbols other than the CRS. That is to say, the modulation symbol of the synchronization signal on the symbol where the CRS is located cannot be used as the reference modulation symbol of any other modulation symbol.
  • the reason for this is that if a modulation symbol uses the modulation symbol on the symbol of the CRS as the reference modulation symbol, then when the reference modulation symbol happens to be CRS, the modulation symbol is inevitably demodulated incorrectly. Moreover, since the UE does not know the specific transmitted RE of the CRS, the UE cannot judge which modulation symbol is demodulated incorrectly. With the above method, only the modulation symbols corresponding to the RE where the CRS is located are demodulated incorrectly, and other modulation symbols are not affected. Alternatively, the reference modulation symbol can also be a known preset modulation symbol.
  • FIG. 7 is a schematic diagram of RE reference symbol mapping on a CRS symbol according to a preferred embodiment of the present invention.
  • a schematic diagram of a reference modulation symbol of a modulation symbol mapped on each RE is given.
  • the RE with vertical lines is the location of the CRS. It can be seen that the reference modulation symbol of the reference modulation symbol of the modulation symbol mapped on the RE on the symbol on which the CRS is located is the modulation symbol mapped on the RE on the symbol without the CRS.
  • the modulation symbol mapped on the RE on the symbol on which the CRS is located is not the reference modulation symbol of any other modulation symbol.
  • the reference modulation symbol of the modulation symbol mapped on the RE on the CRS symbol shall be a modulation symbol mapped on the RE closest thereto, or one of a plurality of REs closest thereto The modulation symbol mapped on the RE.
  • a modulation symbol on the adjacent RE is selected as a reference modulation symbol.
  • the adjacent meaning here means that if the time-frequency resource position of an RE is represented as (k, l), where k represents a subcarrier index and l represents a symbol index, then the phase
  • the time-frequency resource locations of adjacent REs include (k ⁇ 1, l), (k, l ⁇ 1), (k ⁇ 1, l ⁇ 1).
  • the time-frequency resource locations of adjacent REs include (3, 5), (3, 2), (2, 4), (5, 4). ), (2, 3), (2, 5), (4, 3), (4, 5).
  • FIG. 8 is a schematic diagram of adjacent RE reference modulation symbols of an RE according to a preferred embodiment of the present invention, as shown in FIG. 8, wherein the RE is identified by a vertical line, and adjacent REs are identified by a grid.
  • the modulation symbol on the RE on the symbol of the nearest one without the CRS is selected as the reference modulation symbol. As shown by the two curved arrows in Figure 7.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following method steps:
  • the modulation symbols are mapped to the first resource set and the second resource set according to a preset manner, where the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is a reference signal.
  • An OFDM symbol, an OFDM symbol corresponding to an RE in the second resource set is an OFDM symbol that does not include a reference signal;
  • S2 Transmit the modulation symbol on a resource set corresponding to the modulation symbol that sends information, where a mapping relationship between the modulation symbol and the resource set is obtained in the following manner.
  • the storage medium is further arranged to store program code for performing the method steps of the above-described embodiments.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor executes the method steps of the foregoing embodiment according to the stored program code in the storage medium.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the foregoing technical solution provided by the embodiment of the present invention may be applied to the process of sending a message, and the modulation symbol is sent in a resource set corresponding to the modulation symbol of the information to be transmitted, where the mapping relationship between the modulation symbol and the resource set is as follows: Obtaining: the modulation symbol is mapped on the first resource set and the second resource set according to a preset manner, where the orthogonal frequency division multiplexing OFDM symbol corresponding to the resource unit RE in the first resource set is a reference signal
  • the OFDM symbol, the OFDM symbol corresponding to the RE in the second resource set is an OFDM symbol that does not include the reference signal, solves the problem of unreasonable design of the reference signal applied to the NB-LTE system, and improves the stability of the NB-LTE system. Sex.

Abstract

本发明提供了一种信息的发送方法及装置，其中，该方法包括：在与发送信息的调制符号对应的资源集合上发送该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到：将该调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号，解决了应用于NB-LTE系统的参考信号的设计不合理问题，提高了NB-LTE系统稳定性。

Description

信息的发送方法及装置 技术领域
本发明涉及通信领域，具体而言，涉及一种信息的发送方法及装置。
背景技术
机器类型通信(Machine Type Communication，简称为MTC)用户终端(User Equipment，简称为UE)，又称机器到机器(Machine to Machine，简称为M2M)用户通信设备，是目前物联网的主要应用形式。在第三代合作伙伴计划(3rd Generation Partnership Project，简称为3GPP)技术报告TR45.820V200中公开了几种适用于蜂窝级物联网(Comb-Internet Of Things，简称为C-IOT)的技术，其中，窄带长期演进(Narrow Bang-Long Term Evolution，简称为NB-LTE)技术最为引人注目。该系统的系统带宽为200kHz，与全球移动通信(Global system for Mobile Communication，简称为GSM)GSM系统的信道带宽相同，这为NB-LTE系统重用GSM频谱并降低邻近与GSM信道的相互干扰带来了极大便利。NB-LTE的发射带宽与下行链路子载波间隔分别为180kHz和15kHz，分别与长期演进(Long-Term Evolution，简称为LTE)系统一个物理资源块(Physical Resource Block，简称为PRB)的带宽和子载波间隔相同。
对于这种窄带系统，相关技术中LTE中的占用6个PRB的主同步信号(Primary Synchronization Signal，简称为PSS)/辅同步信号(Secondary Synchronization Signal，简称为SSS)/物理广播信道(Physical Broadcast Chanel，简称为PBCH)的设计不再适用，需要重新设计PSS/SSS/PBCH。
针对相关技术中，应用于NB-LTE系统的参考信号的设计不合理问题，目前还没有有效地解决方案。
发明内容
本发明实施例提供了一种信息的发送方法及装置，以至少解决相关技术中应用于NB-LTE系统的参考信号的设计不合理问题。
根据本发明的一个实施例，提供了一种信息的发送方法，包括：
在与发送信息的调制符号对应的资源集合上发送所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
进一步地，所述第一资源集合和所述第二资源集合在所述OFDM符号的位置是预定义的 位置。
进一步地，在所述OFDM符号的循环前缀CP为常规CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,4}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,3,5,6}中取值；
在所述OFDM符号的CP为扩展CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,3}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,4,5}中取值，其中，所述OFDM符号为LTE系统中的OFDM符号，在常规CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5，6}中取值，在扩展CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5}中取值。
进一步地，映射在所述第一资源集合中的调制符号的数目不大于映射在所述第二资源集合中的调制符号的数目。
进一步地，所述调制符号为采用差分调制后的调制符号；
所述调制符号的参考调制符号为一个预设调制符号，或者，所述调制符号的参考调制符号为映射在所述第二资源集合中的调制符号。
进一步地，当多个所述调制符号的参考调制符号为同一个调制符号时，所述多个调制符号中至少有一个调制符号为映射在所述第一资源集合中RE的调制符号。
进一步地，在所述差分调制之前，对信息进行编码和速率匹配。
进一步地，所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的一个资源上映射的调制符号，其中，所述一个调制符号是映射在所述第二资源集合中的调制符号，或者，所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的多个资源上映射的多个调制符号之一，其中，所述多个调制符号中的调制符号是映射在所述第二资源集合中的调制符号。
进一步地，所述信息包括以下至少之一：
同步信息，主信息块MIB，系统信息块SIB，下行控制信息，以及下行数据。
根据本发明的一个实施例，提供了一种信息的接收方法，包括：
在与接收信息的调制符号对应的资源集合上接收所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
进一步地，所述第一资源集合和所述第二资源集合在所述OFDM符号的位置是预定义的位置。
进一步地，在所述OFDM符号的循环前缀CP为常规CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,4}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,3,5,6}中取值；
在所述OFDM符号的CP为扩展CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,3}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,4,5}中取值，其中，所述OFDM符号为LTE系统中的OFDM符号，在常规CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5，6}中取值，在扩展CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5}中取值。
进一步地，映射在所述第一资源集合中的调制符号的数目不大于映射在所述第二资源集合中的调制符号的数目。
进一步地，所述调制符号为采用差分调制后的调制符号；
所述调制符号的参考调制符号为一个预设调制符号，或者，所述调制符号的参考调制符号为映射在所述第二资源集合中的调制符号。
进一步地，当多个所述调制符号的参考调制符号为同一个的调制符号时，所述多个调制符号中至少有一个调制符号为映射在所述第一资源集合中RE的调制符号。
进一步地，在所述差分调制之前，对信息进行编码和速率匹配。
进一步地，所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的一个资源上映射的调制符号，其中，所述一个调制符号是映射在所述第二资源集合中的调制符号，或者，所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的多个资源上映射的多个调制符号之一，其中，所述多个调制符号中的调制符号是映射在所述第二资源集合中的调制符号。
进一步地，所述信息包括以下至少之一：
同步信息，主信息块MIB，系统信息块SIB，下行控制信息，以及下行数据。
根据本发明的另一实施例，提供了一种信息的发送装置，包括：
发送模块，设置为在与发送信息的调制符号对应的资源集合上发送所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
根据本发明的另一实施例，还提供了一种信息的接收装置，包括：
接收模块，设置为在与接收信息的调制符号对应的资源集合上接收所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式 映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
在本发明实施例中，还提供了一种计算机存储介质，该计算机存储介质可以存储有执行指令，该执行指令用于执行上述实施例中的信息的接收方法的实现。
通过本发明实施例，在与发送信息的调制符号对应的资源集合发送该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到：将该调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号，解决了应用于NB-LTE系统的参考信号的设计不合理问题，提高了NB-LTE系统稳定性。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例的一种信息的发送方法的流程图；
图2是根据本发明实施例的一种信息的接收方法的流程图；
图3是根据本发明实施例的一种信息的发送装置的结构框图；
图4是根据本发明实施例的一种信息的接收装置的结构框图；
图5是根据本发明优选实施例一提供的参考调制符号的映射图；
图6是根据本发明优选实施例一提供的RE参考调制符号的示意图；
图7是根据本发明优选实施例二提供的CRS符号上的RE参考符号映射示意图；
图8是根据本发明优选实施例二提供的一个RE的相邻RE参考调制符号示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种信息的发送方法，图1是根据本发明实施例的一种信息的发送方法的流程图，如图1所示，该流程包括如下步骤：
步骤S102，将调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号；
步骤S104，在与发送信息的该调制符号对应的资源集合上发送该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到。
通过上述步骤，在与发送信息的调制符号对应的资源集合上发送该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到：将该调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号，解决了应用于NB-LTE系统的参考信号的设计不合理问题，提高了NB-LTE系统稳定性。
在本实施例中，该第一资源集合和该第二资源集合在该OFDM符号的位置是预定义的位置。
在本实施例中，在该OFDM符号的循环前缀CP为常规CP的情况下，该包含参考信号的OFDM符号的索引从集合{0,1,4}中取值，该不包含参考信号的OFDM符号的索引从集合{2,3,5,6}中取值；
在该OFDM符号的CP为扩展CP的情况下，该包含参考信号的OFDM符号的索引从集合{0,1,3}中取值，该不包含参考信号的OFDM符号的索引从集合{2,4,5}中取值，其中，该OFDM符号为LTE系统中的OFDM符号，在常规CP下，该LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5，6}中取值，在扩展CP下，该LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5}中取值。
在本实施例中，映射在该第一资源集合中的调制符号的数目不大于映射在该第二资源集合中的调制符号的数目。
在本实施例中，该调制符号为采用差分调制后的调制符号；
该调制符号的参考调制符号为一个预设调制符号，或者，该调制符号的参考调制符号为映射在该第二资源集合中的调制符号。
在本实施例中，当多个该调制符号的参考调制符号为同一个调制符号时，该多个调制符号中至少有一个调制符号为映射在该第一资源集合中RE的调制符号。
在本实施例中，在该差分调制之前，对信息进行编码和速率匹配。
在本实施例中，该调制符号的参考调制符号为距离该调制符号映射的资源最近的一个资源上映射的调制符号，其中，该一个调制符号是映射在该第二资源集合中的调制符号，或者，该调制符号的参考调制符号为距离该调制符号映射的资源最近的多个资源上映射的多个调制符号之一，其中，该多个调制符号中的调制符号是映射在该第二资源集合中的调制符号。
在本实施例中，该信息包括以下至少之一：
同步信息，主信息块MIB，系统信息块SIB，下行控制信息，以及下行数据。
在本实施例中还提供了一种信息的接收方法，图2是根据本发明实施例的一种信息的接收方法的流程图，如图2所示，该流程包括如下步骤：
步骤S202，将调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号；
步骤S204，在与接收信息的该调制符号对应的资源集合上接收该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到。
通过上述步骤，在与接收信息的调制符号对应的资源集合上接收该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到：将该调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号，解决了应用于NB-LTE系统的参考信号的设计不合理问题，提高了NB-LTE系统稳定性。
在本实施例中，该第一资源集合和该第二资源集合在该OFDM符号的位置是预定义的位置。
在本实施例中，在该OFDM符号的循环前缀CP为常规CP的情况下，该包含参考信号的OFDM符号的索引从集合{0,1,4}中取值，该不包含参考信号的OFDM符号的索引从集合{2,3,5,6}中取值；
在该OFDM符号的CP为扩展CP的情况下，该包含参考信号的OFDM符号的索引从集合{0,1,3}中取值，该不包含参考信号的OFDM符号的索引从集合{2,4,5}中取值，其中，该OFDM符号为LTE系统中的OFDM符号，在常规CP下，该LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5，6}中取值，在扩展CP下，该LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5}中取值。
在本实施例中，映射在该第一资源集合中的调制符号的数目不大于映射在该第二资源集合中的调制符号的数目。
在本实施例中，该调制符号为采用差分调制后的调制符号；
该调制符号的参考调制符号为一个预设调制符号，或者，该调制符号的参考调制符号为映射在该第二资源集合中的调制符号。
在本实施例中，当多个该调制符号的参考调制符号为同一个的调制符号时，该多个调制符号中至少有一个调制符号为映射在该第一资源集合中RE的调制符号。
在本实施例中，在该差分调制之前，对信息进行编码和速率匹配。
在本实施例中，该调制符号的参考调制符号为距离该调制符号映射的资源最近的一个资源上映射的调制符号，其中，该一个调制符号是映射在该第二资源集合中的调制符号，或者，该调制符号的参考调制符号为距离该调制符号映射的资源最近的多个资源上映射的多个调制符号之一，其中，该多个调制符号中的调制符号是映射在该第二资源集合中的调制符号。
在本实施例中，该信息包括以下至少之一：
同步信息，主信息块MIB，系统信息块SIB，下行控制信息，以及下行数据。
在本实施例中还提供了一种信息的发送装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图3是根据本发明实施例的一种信息的发送装置的结构框图，如图3所示，该装置包括：
第一映射模块32，设置为将调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号；
发送模块34，与第一映射模块32连接，设置为在与发送信息的该调制符号对应的资源集合发送该调制符号。
图4是根据本发明实施例的一种信息的接收装置的结构框图，如图4所示，该装置包括：
第二映射模块42，设置为将该调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号；
接收模块44，与第二映射模块42连接，设置为在与接收信息的调制符号对应的资源集合接收该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。
下面结合本发明优选实施例进行详细说明。
优选实施例一
本发明的优选实施例给出一种信息的传输方法。
传输的信息可以为同步信息，或者为主系统信息模块(Master Information Block，简称为MIB)，或者系统信息块(System Information Block，简称为SIB)，或者下行控制信息，或者下行数据。下行控制信息在下行控制信道上传输，下行控制信道包括并不限于物理下行控制信道(Physical Downlink Control Channel，简称为PDCCH)、增强物理下行控制信道(Enhanced Physical Downlink Control Channel，简称为EPDCCH)，下行数据是在物理下行共享信道(Physical Downlink Shared Channel，简称为PDSCH)上传输。
传输的信息采用差分调制，对于同步信号，采用差分调制可以不需要参考信号进行解调。而且解码性能要比序列相关的性能要好。对于MIB/SIB，在NB-LTE系统中，用户设备(User Equipment，简称为UE)可能无法识别窄带在系统带宽中的位置，无法使用现有的小区专有导频(Cell-specific RS，简称为CRS)进行MIB/SIB的解调，采用差分调制是比较好的解决方案。对于下行控制信息或者下行数据，在NB-LTE系统中，如果是带内inband场景，如果UE没有获得CRS序列的值，那么下行控制信息或者下行数据也可以采用差分来传输，差分传输不需要参考信号就可以解调。
在差分调制中，采用一个调制符号A相对另一个调制符号B的变化来指示信息，在本发明中，调制符号B称为调制符号A的参考调制信号。比如假设参考调制符号B为an，那么如果A等于an，则指示二进制bit“1”；如果A等于-an，则指示二进制bit“0”.在本发明中，每个调制符号只有一个参考调制符号，但多个调制符号的参考符号可以相同。
发送该信息的调制符号分为两个集合，分别映射到两个资源集合上，即第一资源集合和第二资源集合，该第一资源集合中的RE对应的正交频分复用技术(Orthogonal Frequency Division Multiplexing，简称为OFDM)符号为包含参考信号的OFDM符号，该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。该第一资源集合和第二资源集合的位置是预设的。比如两个资源集合之间的关系为前后时分，比如集合1在集合2的时间之前，或者两者为交叉时分，比如一共占用5个OFDM符号，集合1占用第2、3、4个符号，集合2占用第1和第5个符号，或者集合1占用偶数符号，集合2占用奇数符号。两个集合中的调制符号数可以相等，也可以不相等。该调制符号的参考调制符号为一个预设调制符号或者为映射在第二资源集合中的调制符号。这样，可以避免由于同步信号被CRS打掉造成的接收错误。
优选地，映射在第一资源集合中的调制符号的数目小于等于映射在第二资源集合中的调制符号的数目。
图5是根据本发明优选实施例一提供的参考调制符号的映射图，如图5所示，给出了一个例子，S1＝{a1,a2,a3,a4}，S2＝{b1,b2,b3}，S1中的调制符号映射在没有CRS的符号对应的RE上，B→A表示B是A的参考调制符号，其中a1的参考调制符号可以为预设的调制符号。
当多个调制符号的参考调制符号为同一个的调制符号时，该多个调制符号中至少有一个 调制符号为该第一资源集合中的RE上映射的调制符号。如图5所示，a3和b1的参考调制符号都为a2，其中b1为第一资源集合中的RE上映射的调制符号。
优选地，每个调制符号的参考调制符号应为离自己最近的一个资源上的调制符号，或者为离自己最近的几个资源上的调制符号之一。因为距离较近的两个资源上的信道条件较为相似，通过差分处理，可以去掉信道的影响。下面给出一个例子，图6是根据本发明优选实施例一提供的RE参考调制符号的示意图，如图6所示，一个格子表示一个RE，白色部分的OFDM符号上没有CRS，所有RE上的调制符号的参考调制符号都从白色部分的RE中选择，比如，距离RE#3最近的RE为RE#1和RE#5，因此选择其中一个RE#1上的调制符号作为RE#3上的调制符号的参考调制符号。
优选实施例二：
本发明的优选实施例二给出一个发送同步信号/同步信息的例子。MIB/SIB或者下行控制信息或者下行数据的发送方式与此类似。
该同步信号包含N个bit的同步信息，该同步信息包括以下至少之一：
小区标识信息，比如用9bit表示504个小区标识；
TDD/FDD的指示信息，比如用1bit表示；
运营模式信息，比如是独立运营standalone场景，或者是带内inband场景，或者是保护带guard-band场景，比如用2bit来指示，或者1bit指示，比如将inband之外的两种场景用一种状态指示；
定时信息，比如该同步信号每20ms发送一次，用2bit指示为80ms内的哪一个20ms。
该同步信号占用的资源为一个子帧中的若干个符号，包括CRS所在的符号和没有CRS的符号。即为实施例一中所述的两个资源集合。对于正常CP，一个时隙中的符号按照时间顺序的索引分别为0、1、……、6，可能存在CRS的符号的索引属于集合{0,1,4}，其余符号为没有CRS的符号。对于扩展CP，一个时隙中的符号按照时间顺序的索引分别为0、1、……、5，可能存在CRS的符号的索引属于集合{0,1,3}，其余符号为没有CRS的符号。比如该同步信号在时域上为一个子帧中的最后9个符号，频域上为所有的子载波。对于CRS所在的RE，同步信号被打掉，以免影响其他UE接收CRS。
该同步信号的N个bit采用编码器进行编码，该编码器可以为卷积编码器，或者为RM码编码器等，本发明对编码器不做限定，实际应用中，可以任意选择一种编码器。比如采用1/3码率的卷积码，根据该同步信号占用的RE数和采用的调制方式(比如BPSK或者QPSK等)，对编码后的数据进行速率匹配得若干bit。然后将该bit进行差分调制，最后将差分调制后的调制符号映射到RE中。
对于映射到CRS所在的符号上的同步信号的调制符号，其参考调制符号应为映射到CRS之外的符号上的同步信号的调制符号。对于映射到CRS之外的符号上的同步信号的调制符号， 其参考调制符号应为映射到CRS之外的符号上的同步信号的其他调制符号。也就是说，CRS所在的符号上的同步信号的调制符号，不能作为其他任何调制符号的参考调制符号。这么做的原因是：如果一个调制符号将CRS所在符号上的调制符号作为参考调制符号，那么当这个参考调制符号恰好是CRS时，这个调制符号就必然会解调不正确。而且由于UE并不知道CRS的具体发送的RE，UE也不能判断哪个调制符号解调的不正确。而采用上述的方法，只有CRS所在的RE对应的调制符号会解调不正确，而其他的调制符号都不影响。或者，参考调制符号也可以是一个已知的预设调制符号。
图7是根据本发明优选实施例二提供的CRS符号上的RE参考符号映射示意图，如图7所示中，给出了每个RE上映射的调制符号的参考调制符号的示意图。有竖线的RE为CRS的位置。可以看出，CRS所在的符号上的RE上映射的调制符号的参考调制符号的参考调制符号为没有CRS的符号上的RE上映射的调制符号。CRS所在的符号上的RE上映射的调制符号不是任何其他调制符号的参考调制符号。
优选地，为了提高差分解调的性能，CRS符号上的RE上映射的调制符号的参考调制符号应为离其最近的RE上映射的调制符号，或者为离其最近的多个RE中的一个RE上映射的调制符号。如图7所示，如果一个RE的相邻RE即为没有CRS的符号，则选择这个相邻的RE上的调制符号作为参考调制符号。如图7中的直箭头所示，这里，相邻的含义是指：如果一个RE的时频资源位置表示为(k,l)，其中k表示子载波索引，l表示符号索引，那么其相邻的RE的时频资源位置包括(k±1,l)、(k,l±1)、(k±1,l±1)。比如一个RE的时频资源位置表示为(3，4)，那么其相邻的RE的时频资源位置包括(3，5)、(3，2)、(2，4)、(5，4)、(2，3)、(2，5)、(4，3)、(4，5)。图8是根据本发明优选实施例提供的一个RE的相邻RE参考调制符号示意图，如图8所示，其中该RE用竖线标识，相邻RE用网格标识。
如果一个RE的相邻RE不是没有CRS的符号，则选择最近的一个没有CRS的符号上的RE上的调制符号为参考调制符号。如图7中的两个弯箭头所示。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下方法步骤的程序代码：
S1，将调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号；
S2，在与发送信息的该调制符号对应的资源集合上发送该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到。
可选地，存储介质还被设置为存储用于执行上述实施例方法步骤的程序代码。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述实施例方法步骤。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
本发明实施例提供的上述技术方案，可以应用于消息的发送过程中，在与发送信息的调制符号对应的资源集合发送该调制符号，其中，该调制符号与该资源集合的映射关系通过以下方式得到：将该调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与该第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与该第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号，解决了应用于NB-LTE系统的参考信号的设计不合理问题，提高了NB-LTE系统稳定性。

Claims (20)

  1. 一种信息的发送方法，包括：
    在与发送信息的调制符号对应的资源集合上发送所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
  2. 根据权利要求1所述的方法，其中，
    所述第一资源集合和所述第二资源集合在所述OFDM符号的位置是预定义的位置。
  3. 根据权利要求1所述的方法，其中，
    在所述OFDM符号的循环前缀CP为常规CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,4}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,3,5,6}中取值；
    在所述OFDM符号的CP为扩展CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,3}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,4,5}中取值，其中，所述OFDM符号为LTE系统中的OFDM符号，在常规CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5，6}中取值，在扩展CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5}中取值。
  4. 根据权利要求1所述的方法，其中，
    映射在所述第一资源集合中的调制符号的数目不大于映射在所述第二资源集合中的调制符号的数目。
  5. 根据权利要求1所述的方法，其中，
    所述调制符号为采用差分调制后的调制符号；
    所述调制符号的参考调制符号为一个预设调制符号，或者，所述调制符号的参考调制符号为映射在所述第二资源集合中的调制符号。
  6. 根据权利要求5所述的方法，其中，
    当多个所述调制符号的参考调制符号为同一个调制符号时，所述多个调制符号中至少有一个调制符号为映射在所述第一资源集合中RE的调制符号。
  7. 根据权利要求5所述的方法，其中，
    在所述差分调制之前，对信息进行编码和速率匹配。
  8. 根据权利要求5所述的方法，其中，
    所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的一个资源上映射的调制符号，其中，所述一个调制符号是映射在所述第二资源集合中的调制符号，或者，所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的多个资源上映射的多个调制符号之一，其中，所述多个调制符号中的调制符号是映射在所述第二资源集合中的调制符号。
  9. 根据权利要求1所述的方法，其中，所述信息包括以下至少之一：
    同步信息，主信息块MIB，系统信息块SIB，下行控制信息，以及下行数据。
  10. 一种信息的接收方法，包括：
    在与接收信息的调制符号对应的资源集合上接收所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
  11. 根据权利要求10所述的方法，其中，
    所述第一资源集合和所述第二资源集合在所述OFDM符号的位置是预定义的位置。
  12. 根据权利要求10所述的方法，其中，
    在所述OFDM符号的循环前缀CP为常规CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,4}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,3,5,6}中取值；
    在所述OFDM符号的CP为扩展CP的情况下，所述包含参考信号的OFDM符号的索引从集合{0,1,3}中取值，所述不包含参考信号的OFDM符号的索引从集合{2,4,5}中取值，其中，所述OFDM符号为LTE系统中的OFDM符号，在常规CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5，6}中取值，在扩展CP下，所述LTE系统中的OFDM符号在一个时隙中的索引从集合{0,1,2，3，4，5}中取值。
  13. 根据权利要求10所述的方法，其中，
    映射在所述第一资源集合中的调制符号的数目不大于映射在所述第二资源集合中的调制符号的数目。
  14. 根据权利要求10所述的方法，其中，
    所述调制符号为采用差分调制后的调制符号；
    所述调制符号的参考调制符号为一个预设调制符号，或者，所述调制符号的参考调制符号为映射在所述第二资源集合中的调制符号。
  15. 根据权利要求14所述的方法，其中，
    当多个所述调制符号的参考调制符号为同一个的调制符号时，所述多个调制符号中至少有一个调制符号为映射在所述第一资源集合中RE的调制符号。
  16. 根据权利要求14所述的方法，其中，
    在所述差分调制之前，对信息进行编码和速率匹配。
  17. 根据权利要求14所述的方法，其中，
    所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的一个资源上映射的调制符号，其中，所述一个调制符号是映射在所述第二资源集合中的调制符号，或者，所述调制符号的参考调制符号为距离所述调制符号映射的资源最近的多个资源上映射的多个调制符号之一，其中，所述多个调制符号中的调制符号是映射在所述第二资源集合中的调制符号。
  18. 根据权利要求10所述的方法，其中，所述信息包括以下至少之一：
    同步信息，主信息块MIB，系统信息块SIB，下行控制信息，以及下行数据。
  19. 一种信息的发送装置，包括：
    发送模块，设置为在与发送信息的调制符号对应的资源集合上发送所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
  20. 一种信息的接收装置，包括：
    接收模块，设置为在与接收信息的调制符号对应的资源集合上接收所述调制符号，其中，所述调制符号与所述资源集合的映射关系通过以下方式得到：将所述调制符号按照预设方式映射在第一资源集合和第二资源集合上，其中，与所述第一资源集合中的资源单元RE对应的正交频分复用OFDM符号为包含参考信号的OFDM符号，与所述第二资源集合中的RE对应的OFDM符号为不包含参考信号的OFDM符号。
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