WO2017173981A1 - 解调方法、装置、终端及系统 - Google Patents

解调方法、装置、终端及系统 Download PDF

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Publication number
WO2017173981A1
WO2017173981A1 PCT/CN2017/079461 CN2017079461W WO2017173981A1 WO 2017173981 A1 WO2017173981 A1 WO 2017173981A1 CN 2017079461 W CN2017079461 W CN 2017079461W WO 2017173981 A1 WO2017173981 A1 WO 2017173981A1
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Prior art keywords
information
communication information
demodulation
dtxw
blind solution
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PCT/CN2017/079461
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English (en)
French (fr)
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云翔
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北京佰才邦技术有限公司
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Priority to US16/091,387 priority Critical patent/US10680746B2/en
Publication of WO2017173981A1 publication Critical patent/WO2017173981A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0036—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the receiver
    • H04L1/0038—Blind format detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H04J11/0073—Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H04J11/0076—Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/005—Allocation of pilot signals, i.e. of signals known to the receiver of common pilots, i.e. pilots destined for multiple users or terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0466—Wireless resource allocation based on the type of the allocated resource the resource being a scrambling code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and in particular, to a demodulation method, apparatus, terminal, and system.
  • a mobile communication system refers to a system in which an operator provides communication services for a user terminal (such as a mobile phone) by deploying a wireless access network device (such as a base station) and a core network device (such as a Home Location Register, HLR).
  • a wireless access network device such as a base station
  • a core network device such as a Home Location Register, HLR.
  • the first generation mobile communication system refers to the original analog, voice-only cellular phone standard, mainly using analog technology and Frequency Division Multiple Access (FDMA) access method; second generation mobile communication
  • FDMA Frequency Division Multiple Access
  • LTE/LTE-A Long Term Evolution/Long Term Evolution-Advanced
  • 3GPP International Organization for Standardization
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-F
  • the MulteFire standard is based on the LTE R13 LAA downlink transmission method, and the uplink transmission method It is defined and can be independently operated on unlicensed bands through technical enhancements.
  • the MulteFire standard works in unlicensed bands, it also introduces a similar Listen-Before-Talk (LBT) technology to WiFi to ensure that it coexists with other technologies (such as WiFi) for unlicensed bands.
  • LBT Listen-Before-Talk
  • the MulteFire standard defines a DRS Transmission Window (DTxW), which is a cell attempt to transmit.
  • DTxW DRS Transmission Window
  • a periodic window of the DRS Specifically, the DTxW has a minimum transmission period of 40 ms, and the transmitted window has a length of 1-10 ms, and is configured by the cell.
  • the synchronization signal mainly includes Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS), Enhanced Primary Synchronization Signals (ePSS), and Enhanced Secondary Synchronization Signals (enhanced Secondary Synchronization Signals). , eSSS).
  • the synchronization signal may be part of the DRS, that is, transmitted within the DTxW, and when the subframes 0 to 4 are transmitted, the short code of the SSS is 0, when the subframes 5 to 9 are transmitted, The short code of the SSS is 1.
  • the synchronization signal can also be transmitted on subframes 0 or 5 outside of DTxW.
  • the PSS is transmitted on the 7th OFDM symbol
  • the SSS is transmitted on the 6th OFDM symbol
  • the ePSS is transmitted on the 4th OFDM symbol
  • the eSSS is transmitted on the 3rd OFDM symbol.
  • the synchronization signal can enable the user terminal to obtain time and frequency synchronization information by one demodulation at a lower signal to noise ratio. Specifically, the boundary position of the subframe can be obtained, but the subframe number and the system frame number cannot be obtained.
  • the Enhanced Physical Broadcast Channel mainly broadcasts a Master Information Block (MIB).
  • the ePBCH may be part of the DRS and may be sent in any subframe within the DTxW, where 3 bits indicates the subframe offset relative to the subframe 0 or the subframe 5.
  • the user terminal can obtain the subframe number by demodulating the information of the 3 bits.
  • the ePBCH may also be transmitted on subframe 0 other than DTxW.
  • the MIB also indicates the system frame number information of 8 bits, and The 2bits information is obtained through the redundant RV version of the ePBCH.
  • the user terminal can obtain the system frame number (SFN) by blindly decoding the RV version of the ePBCH and the information of the 8 bits broadcasted in the MIB, and complete all synchronization operations.
  • SFN system frame number
  • the ePBCH occupies a total of 6 OFDM symbols of 7, 8, 9, 10, 11, and 4 for transmission.
  • the enhanced system information block may be part of the DRS and may be sent in any subframe within the DTxW. Unlike other DRS-occupied dedicated pilot resources, the eSIB occupies PDSCH resources. . The eSIB may also be transmitted on subframe 0 other than DTxW.
  • the CRS and the ePBCH can be sent within the DTxW or can be sent outside the DTxW. Therefore, the transmission opportunity is more flexible and flexible, so the user terminal usually encounters the following scenario when demodulating the CRS and the ePBCH. :
  • Scenario 1 When DRS is transmitted within DTxW, if DRS is transmitted in subframes 0 to 4, the CRS is scrambled with subframe 0, and in subframes 5-9, subframe 5 is used. Scrambling the CRS.
  • the user terminal can obtain the channel estimation result of the system by demodulating the CRS, and then demodulate and obtain the enhanced physical broadcast channel (ePBCH), the physical downlink control channel (PDCCH), and the corresponding physical downlink sharing. Channel (Physical Downlink Shared Channel, PDSCH).
  • ePBCH enhanced physical broadcast channel
  • PDCCH physical downlink control channel
  • Channel Physical Downlink Shared Channel
  • the ePBCH can be sent on any subframe within the DTxW or on subframe 0 outside the DTxW.
  • RV0, RV1, RV2, and RV3 There are four RV versions of ePBCH transmission: RV0, RV1, RV2, and RV3.
  • SFN mod 4 SFN divided by 4 is the remainder
  • x is RVx.
  • the user terminal does not first know whether the time is within the DTxW, and secondly does not know the corresponding SFN value. Therefore, as shown in FIG. 5A, the user terminal needs to blindly solve the ePBCH according to all RV versions at all times, which improves the complexity of demodulation and increases power consumption.
  • An object of the present disclosure is to provide a demodulation method, apparatus, terminal, and system for solving the demodulation of information in an unlicensed frequency band, including CRS and ePBCH in the related art, which often has various assumptions, resulting in high demodulation complexity. Increase the power consumption problem.
  • an embodiment of the present disclosure provides a demodulation method, including:
  • an embodiment of the present disclosure further provides a demodulation apparatus, including:
  • An obtaining module configured to acquire communication information of a cell
  • a blind solution module configured to perform blind solution on the synchronization signal in the communication information to obtain a blind solution result
  • a determining module configured to determine time range information carried by the communication information according to the blind solution result
  • a demodulation module configured to demodulate the communication information according to the time range information.
  • an embodiment of the present disclosure further provides a terminal, including the above-described demodulation device.
  • an embodiment of the present disclosure further provides a demodulation system, including:
  • a receiver configured to receive communication information of a cell
  • a processor configured to be connected to the receiver, to perform blind decoding on the synchronization signal in the communication information, to obtain a blind solution result, and determine time range information carried by the communication information according to the blind solution result, according to The time range information demodulates the communication information.
  • the synchronization information in the communication information is blindly obtained by acquiring the communication information of the cell, and a blind solution result is obtained, and the time range information carried by the communication information is determined according to the blind solution result, and Demodulating the communication information according to the time range information, With the obtained a priori information, some situations of the communication information of the cell are determined, thereby reducing the hypothesis when demodulating the communication information, reducing the demodulation complexity, and reducing the power consumption.
  • FIG. 1 is a flow chart showing a demodulation method provided by a first embodiment of the present disclosure
  • FIG. 2 is a flowchart showing a demodulation method provided by a second embodiment of the present disclosure
  • FIG. 3 is a flowchart showing a demodulation method provided by a third embodiment of the present disclosure
  • FIG. 4 is a flowchart showing a demodulation method provided by a fourth embodiment of the present disclosure.
  • FIG. 5A is a schematic diagram showing a blind solution of an ePBCH according to all RV versions in the related art
  • FIG. 5B is a schematic diagram showing the blind solution ePBCH using the determined RV version of the fourth embodiment of the present invention.
  • FIG. 6 is a flowchart showing a demodulation method according to a fifth embodiment of the present disclosure.
  • FIG. 7 is a structural block diagram of a demodulation apparatus according to a sixth embodiment of the present disclosure.
  • FIG. 8 is a block diagram showing the structure of a demodulation system according to a seventh embodiment of the present disclosure.
  • a first embodiment of the present disclosure provides a demodulation method, wherein the demodulation method includes the following steps 101 to 104, which are described in detail below.
  • Step 101 Acquire communication information of a cell.
  • the demodulation method is applied to, for example, a mobile phone terminal, a handheld device, a wireless modem, etc., and can also be applied to other devices capable of transmitting or receiving wireless signals.
  • the communication information is specifically information on the entire bandwidth acquired by the terminal operating in the unlicensed frequency band from the corresponding cell.
  • the communication information includes, for example, a synchronization signal, a reference signal, a broadcast signal, a control signal, a data signal, and the like.
  • Step 102 Perform blind solution on the synchronization signal in the communication information to obtain a blind solution result.
  • the synchronization signal mainly includes a primary synchronization signal PSS, a secondary synchronization signal SSS, an enhanced primary synchronization signal ePSS, and an enhanced secondary synchronization signal eSSS.
  • the synchronization signal may be part of the DRS, that is, transmitted within the DTxW, or may be transmitted on the subframe 0 other than the DTxW.
  • the position of the synchronization signal is fixed.
  • the synchronization signal is in the intermediate frequency domain position 6RB of the communication information.
  • the blind solution of the synchronization signal is mainly used to determine some information of the corresponding cell, such as cell identification information, frequency information, etc., to reduce the complexity of subsequent demodulation.
  • Step 103 Determine time range information carried by the communication information according to the blind solution result.
  • the time range information is, for example, a reference subframe number, a correspondence relationship between the DRS transmission window DTxW and the system frame number SFN, and the like, and is a prior information included in the communication information of the cell acquired in the foregoing step 101, Is to determine the same information.
  • Step 104 Demodulate the communication information according to the time range information.
  • time range information is information that is determined to be constant, some conditions of the communication information may be determined according to the time range information, thereby reducing hypotheses when demodulating the communication information, and reducing demodulation complexity.
  • the demodulation method of the embodiment of the present disclosure by acquiring the communication information of a cell, blindly decoding the synchronization signal in the communication information to obtain a blind solution result, and determining, according to the blind solution result, the communication information Time range information, and demodulating the communication information according to the time range information, and determining, by using the obtained a priori information, some situations of communication information of the cell, thereby reducing demodulation of the communication information Assume that the demodulation complexity is reduced and power consumption is reduced.
  • a second embodiment of the present disclosure provides a demodulation method, including the following steps 201 to 205, which are described in detail below.
  • Step 201 Acquire communication information of a cell.
  • the demodulation method is applied to, for example, a mobile phone terminal, a handheld device, a wireless modem, etc., and can also be applied to other devices capable of transmitting or receiving wireless signals.
  • the communication information is specifically the entire bandwidth acquired by the terminal working in the unlicensed frequency band from the corresponding cell. Information on.
  • Step 202 Perform blind solution on the synchronization signal in the communication information to obtain a blind solution result.
  • the synchronization signal mainly includes a primary synchronization signal PSS, a secondary synchronization signal SSS, an enhanced primary synchronization signal ePSS, and an enhanced secondary synchronization signal eSSS.
  • the synchronization signal may be part of the DRS, that is, transmitted within the DTxW.
  • the short code of the SSS is 0.
  • the subframes 5 to 9 are sent, the The short code of SSS is 1.
  • the synchronization signal can also be transmitted on subframes 0 or 5 outside of DTxW.
  • the blind solution result of the step 202 can be divided into the following types: (1) the synchronization information is included in the subframe of the communication information, and the short code of the SSS is 0 (indicating that the cell is 0 to 4 within the DTxW) The communication information transmitted in a certain subframe of the number or the communication information transmitted in the subframe No. 0 other than the DTxW); (2) the synchronization information of the subframe of the communication information and the short code of the SSS is 1 (representing the communication information transmitted by a certain subframe of the cell 5 to 9 within the DTxW or the communication information transmitted by the subframe 5 other than the DTxW); (3) the communication information The sync signal is not detected in the subframe.
  • Step 203 Determine a reference subframe number of the communication information according to the blind solution result.
  • the reference subframe number determined by the step 203 may be classified into the following types: (1) when the subframe of the communication information has a synchronization signal and the short code of the SSS is 0, determining that the reference subframe number is 0; (2) when the subframe of the communication information has a synchronization signal and the short code of the SSS is 1, the reference subframe number is determined to be 5; (3) when the synchronization signal is not detected in the subframe of the communication information, the reference is determined.
  • the subframe number is the subframe number of the communication information, that is, the current subframe number.
  • Step 204 Determine a scrambling manner of the CRS in the communication information according to the reference subframe number.
  • the reference subframe number and the scrambling mode are corresponding.
  • the corresponding scrambling mode is scrambled in the case where the CRS is transmitted in the x-frame.
  • Step 205 Demodulate the CRS according to the scrambling mode.
  • the scrambling mode of the CRS can be known, thereby avoiding blind decoding of the CRS by using multiple scrambling hypotheses, and reducing the complexity of demodulation.
  • channel estimation can also be performed, and channel estimation is utilized.
  • the enhanced physical broadcast channel (ePBCH) the physical downlink control channel PDCCH, and the physical downlink shared channel PDSCH are received and demodulated.
  • ePBCH enhanced physical broadcast channel
  • PDCCH physical downlink control channel
  • PDSCH physical downlink shared channel
  • the demodulation method of the embodiment of the present disclosure performs blind decoding on the synchronization signal in the communication information by acquiring communication information of a cell, and obtains a blind solution result, and determines the communication information according to the blind solution result. Determining, according to the reference subframe number, a scrambling manner of the CRS in the communication information according to the reference subframe number, and demodulating the CRS according to the scrambling manner, by using the obtained a priori information, Determining the scrambling mode of the CRS in the communication information, thereby reducing the scrambling hypothesis when demodulating the CRS, reducing the demodulation complexity, and reducing the power consumption.
  • a third embodiment of the present disclosure provides a demodulation method, including the following steps 301 to 304, which are described in detail below.
  • Step 301 Acquire communication information of a cell.
  • the demodulation method is applied to, for example, a mobile phone terminal, a handheld device, a wireless modem, etc., and can also be applied to other devices capable of transmitting or receiving wireless signals.
  • the communication information is specifically information on the entire bandwidth acquired by the terminal working in the unlicensed frequency band from the corresponding cell.
  • Step 302 Perform blind solution on the synchronization signal in the communication information to obtain a blind solution result, and simultaneously solve the CRS in the communication information according to a scrambling manner corresponding to the subframe number of the communication information. Tune.
  • the synchronization signal mainly includes a primary synchronization signal PSS, a secondary synchronization signal SSS, an enhanced primary synchronization signal ePSS, and an enhanced secondary synchronization signal eSSS.
  • the synchronization signal may be part of the DRS, that is, transmitted within the DTxW.
  • the short code of the SSS is 0.
  • the subframes 5 to 9 are sent, the The short code of SSS is 1.
  • the synchronization signal can also be transmitted on subframes 0 or 5 outside of DTxW.
  • the blind solution result of the step 302 can be divided into the following types: (1) the synchronization information is included in the subframe of the communication information, and the short code of the SSS is 0 (indicating that the cell is 0 to 4 within the DTxW) The communication information transmitted in a certain subframe of the number or the communication information transmitted in the subframe No. 0 other than the DTxW); (2) the synchronization information of the subframe of the communication information and the short code of the SSS is 1 (representing the communication information sent by a certain subframe of the cell 5 to 9 within the DTxW or at DTxW The communication information transmitted in the other subframe No. 5; (3) the synchronization signal is not detected in the subframe of the communication information.
  • the scrambling method corresponding to the subframe number of the communication information is scrambled when the CRS is transmitted in the same subframe as the subframe number of the communication information.
  • Step 303 If the blind solution result is that the subframe of the communication information has a synchronization signal, determine that the reference subframe number of the communication information is 0 or 5.
  • the reference subframe number is 0; the subframe of the communication information has a synchronization signal and the SSS is short.
  • the code is 1, the reference subframe number is determined to be 5.
  • the demodulation is completed, and subsequent processing is not performed.
  • Step 304 Re-demodulate the CRS in the communication information according to a scrambling manner corresponding to the reference subframe number 0 or 5.
  • the scrambling manner corresponding to the reference subframe number 0 or 5 is: scrambling in a case where the CRS is transmitted in the subframe 0 or 5.
  • the demodulation method of the embodiment of the present disclosure performs blind decoding on the synchronization signal in the communication information by acquiring communication information of a cell, and obtains a blind solution result, and according to the subframe number corresponding to the communication information.
  • Re-demodulating the CRS in the communication information according to the scrambling mode corresponding to the reference subframe number 0 or 5 can not only reduce the scrambling hypothesis when demodulating the CRS, but also reduce the demodulation time and reduce Demodulation complexity and reduced power consumption.
  • a fourth embodiment of the present disclosure provides a demodulation method, including the following steps 401 to 405, which are described in detail below.
  • Step 401 Acquire communication information of a cell.
  • the demodulation method is applied to, for example, a mobile phone terminal, a handheld device, a wireless modem, etc., and can also be applied to other devices capable of transmitting or receiving wireless signals.
  • the communication information is specifically the entire bandwidth acquired by the terminal working in the unlicensed frequency band from the corresponding cell. Information on.
  • Step 402 Perform blind solution on the synchronization signal in the communication information to obtain cell identification information.
  • the synchronization signal mainly includes a primary synchronization signal PSS, a secondary synchronization signal SSS, an enhanced primary synchronization signal ePSS, and an enhanced secondary synchronization signal eSSS.
  • the synchronization signal may be part of the DRS, that is, transmitted within the DTxW, or may be transmitted on the subframe 0 other than the DTxW.
  • the cell identifier information is, for example, a cell identifier, a cell ID, a PSS value, an SSS value, and the like, which is not limited by the disclosure.
  • Step 403 Determine, according to the cell identity information, a correspondence between the DRS transmission window DTxW and the system frame number SFN.
  • the correspondence between the DTxW and the SFN can be calculated by using the cell identification information.
  • the cell identity information is the cell identity Cell ID
  • the result of Cell ID mod 4 (Cell ID divided by 4 is the remainder) may be the result of SFN mod 4, which is the system frame number that DTxW can transmit.
  • the Cell ID mod 4 is 3; then, the SFN mod 4 is 3, that is, the DTxW can be transmitted on the SFN of 3, 7, 11, .
  • Step 404 Determine, according to the correspondence between the DTxW and the SFN, a redundant RV version of the enhanced physical broadcast channel ePBCH in the communication information.
  • RV0, RV1, RV2, and RV3 there are four RV versions of ePBCH transmission: RV0, RV1, RV2, and RV3.
  • the RV version of the corresponding ePBCH can only be RV3.
  • the ePBCH can also be transmitted on subframe 0 outside of DTxW.
  • Step 405 Demodulate the ePBCH according to the RV version.
  • the RV version of the ePBCH transmitted within the DTxW can be known, thereby avoiding blind decoding of the ePBCH by using multiple RV versions, and reducing the complexity of demodulation.
  • the demodulation of the ePBCH only needs to be blindly solved according to RV3 at all times, and blindly solve all RV versions on the subframe 0, compared to FIG. 5A.
  • the demodulation method shown can reduce the RV version assumption.
  • the demodulation method of the embodiment of the present disclosure by acquiring the communication information of a cell, blindly decoding the synchronization signal in the communication information, obtaining the cell identification information, and determining the correspondence between the DTxW and the SFN according to the cell identification information. Determining an RV version of the ePBCH in the communication information according to the correspondence between the DTxW and the SFN, and demodulating the ePBCH according to the RV version, and determining the communication information by using the obtained a priori information
  • the RV version of ePBCH which reduces the RV version assumption when demodulating ePBCH, reduces demodulation complexity, and reduces power consumption.
  • a fifth embodiment of the present disclosure provides a demodulation method, including the following steps 601 to 605, which are described in detail below.
  • Step 601 Acquire communication information of a cell.
  • the demodulation method is applied to, for example, a mobile phone terminal, a handheld device, a wireless modem, etc., and can also be applied to other devices capable of transmitting or receiving wireless signals.
  • the communication information is specifically information on the entire bandwidth acquired by the terminal working in the unlicensed frequency band from the corresponding cell.
  • Step 602 Perform blind decoding on the synchronization signal in the communication information to obtain frequency information.
  • the synchronization signal mainly includes a primary synchronization signal PSS, a secondary synchronization signal SSS, an enhanced primary synchronization signal ePSS, and an enhanced secondary synchronization signal eSSS.
  • the synchronization signal may be part of the DRS, that is, transmitted within the DTxW, or may be transmitted on the subframe 0 other than the DTxW.
  • the frequency information is, for example, a center frequency point EARFCN value, a center frequency value, a specific frequency value, a specific frequency offset, and the like, which are not limited by the disclosure.
  • Step 603 Determine, according to the frequency information, a correspondence between DTxW and SFN.
  • the correspondence between the DTxW and the SFN can be calculated by using the frequency information.
  • the frequency information is an EARFCN value
  • the result of EARFCN mod 4 (EARFCN divided by 4 is the result of SFN mod 4)
  • SFN is a DTxW transmittable system.
  • the frame number is an EARFCN value
  • EARFCN 11
  • SFN mod 4 3
  • SFN mod 4 3
  • DTxW can be transmitted on SFNs of 3, 7, 11, .
  • Step 604 Determine an RV version of the ePBCH in the communication information according to the correspondence between the DTxW and the SFN.
  • RV0, RV1, RV2, and RV3 there are four RV versions of ePBCH transmission: RV0, RV1, RV2, and RV3.
  • the RV version of the corresponding ePBCH can only be RV3.
  • the ePBCH can also be transmitted on subframe 0 outside of DTxW.
  • Step 605 Demodulate the ePBCH according to the RV version.
  • the RV version of the ePBCH transmitted within the DTxW can be known, thereby avoiding blind decoding of the ePBCH by using multiple RV versions, and reducing the complexity of demodulation.
  • the demodulation of the ePBCH only needs to be blindly solved according to RV3 at all times, and blindly solve all RV versions on the subframe 0, compared to FIG. 5A.
  • the demodulation method shown can reduce the RV version assumption.
  • the demodulation method of the embodiment of the present disclosure by acquiring the communication information of a cell, blindly decoding the synchronization signal in the communication information, obtaining frequency information, and determining a correspondence between the DTxW and the SFN according to the frequency information, according to the Determining a correspondence between the DTxW and the SFN, determining an RV version of the ePBCH in the communication information, and demodulating the ePBCH according to the RV version, and determining, by using the obtained a priori information, the communication information
  • the RV version of ePBCH which reduces the RV version assumption when demodulating ePBCH, reduces demodulation complexity, and reduces power consumption.
  • a sixth embodiment of the present disclosure provides a demodulation apparatus, including:
  • the obtaining module 71 is configured to acquire communication information of a cell.
  • the blind solution module 72 is configured to perform blind solution on the synchronization signal in the communication information to obtain a blind solution result
  • a determining module 73 configured to determine time range information carried by the communication information according to the blind solution result
  • the demodulation module 74 is configured to demodulate the communication information according to the time range information.
  • the time range information includes a reference subframe number.
  • the demodulation module includes:
  • a first determining unit configured to determine, according to the reference subframe number, a scrambling manner of the cell reference signal CRS in the communication information
  • a first demodulating unit configured to demodulate the CRS according to the scrambling manner.
  • the blind solution result is at least one of cell identification information and frequency information.
  • the determining module is specifically configured to:
  • the blind solution result is the cell identity information, determining, according to the cell identity information, a correspondence between the DRS transmission window DTxW and the system frame number SFN; or
  • the blind solution result is frequency information, determining a correspondence between the DTxW and the SFN according to the frequency information; or
  • the correspondence between the DTxW and the SFN is determined according to the cell identification information and the frequency information.
  • the demodulation module includes:
  • a second determining unit configured to determine, according to the correspondence between the DTxW and the SFN, a redundant RV version of the enhanced physical broadcast channel ePBCH in the communication information
  • a second demodulation unit configured to demodulate the ePBCH according to the RV version.
  • an embodiment of the present disclosure further provides a terminal, including the above-described demodulation device.
  • the device embodiment of the present disclosure is a device corresponding to the embodiment of the foregoing method, and all the implementation means in the foregoing method embodiments are applicable to the embodiment of the device, and the same technical effects can be achieved.
  • a seventh embodiment of the present disclosure provides a demodulation system, including:
  • a receiver 81 configured to receive communication information of a cell
  • the processor 82 is connected to the receiver, and configured to perform a blind solution on the synchronization signal in the communication information to obtain a blind solution result, and determine time range information carried by the communication information according to the blind solution result. Demodulating the communication information according to the time range information.
  • the demodulation system of the present disclosure can implement the functions realized by all the modules in the above device embodiments, and can achieve the same technical effects as those of the above device embodiments.
  • the objects of the present disclosure can also be achieved by running a program or a set of programs on any computing device.
  • the computing device can be a well-known general purpose device.
  • the objects of the present disclosure may also be realized by merely providing a program product including program code for implementing the method or apparatus. That is to say, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure.
  • the storage medium may be any known storage medium or any storage medium developed in the future.
  • various components or steps may be decomposed and/or recombined.
  • a demodulation method comprising:
  • A3 The demodulation method according to A2, wherein the step of demodulating the communication information according to the time range information comprises:
  • A4 The demodulation method according to A1, wherein the blind solution result is at least one of cell identification information and frequency information.
  • the demodulation method according to A4, wherein the determining, according to the blind solution result, the time range information carried by the communication information comprises:
  • the result of the blind solution is cell identification information, determining, according to the cell identity information, a correspondence between the discovery reference signal DRS transmission window DTxW and the system frame number SFN; or
  • the blind solution result is frequency information, determining a correspondence between the DTxW and the SFN according to the frequency information; or
  • the correspondence between the DTxW and the SFN is determined according to the cell identification information and the frequency information.
  • A6 The demodulation method according to A5, wherein the step of demodulating the communication information according to the time range information comprises:
  • a demodulation device comprising:
  • An obtaining module configured to acquire communication information of a cell
  • a blind solution module configured to perform blind solution on the synchronization signal in the communication information to obtain a blind solution result
  • a determining module configured to determine time range information carried by the communication information according to the blind solution result
  • a demodulation module configured to demodulate the communication information according to the time range information.
  • A8 The demodulation device of A7, wherein the time range information comprises a reference subframe number.
  • demodulation module comprises:
  • a first determining unit configured to determine, according to the reference subframe number, a scrambling manner of the cell reference signal CRS in the communication information
  • a first demodulating unit configured to demodulate the CRS according to the scrambling manner.
  • the demodulation device according to A7, wherein the blind solution result is at least one of cell identification information and frequency information.
  • the demodulation device according to A10, wherein the determining module is specifically configured to:
  • the blind solution result is the cell identity information, determining, according to the cell identity information, a correspondence between the DRS transmission window DTxW and the system frame number SFN; or
  • the blind solution result is frequency information, determining a correspondence between the DTxW and the SFN according to the frequency information; or
  • the correspondence between the DTxW and the SFN is determined according to the cell identification information and the frequency information.
  • demodulation module comprises:
  • a second determining unit configured to determine, according to the correspondence between the DTxW and the SFN, a redundant RV version of the enhanced physical broadcast channel ePBCH in the communication information
  • a second demodulation unit configured to demodulate the ePBCH according to the RV version.
  • a terminal comprising the demodulation device of any of the above A7-A12.
  • a demodulation system comprising:
  • a receiver configured to receive communication information of a cell
  • a processor configured to be connected to the receiver, to perform blind decoding on the synchronization signal in the communication information, to obtain a blind solution result, and determine time range information carried by the communication information according to the blind solution result, according to The time range information demodulates the communication information.

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Abstract

一种解调方法、装置、终端及系统，其中，所述解调方法包括：获取一小区的通信信息，对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息携带的时间范围信息，根据所述时间范围信息，对所述通信信息进行解调。

Description

解调方法、装置、终端及系统
相关申请的交叉引用
本申请主张在2016年4月8日在中国提交的中国专利申请号No.201610218168.9的优先权，其全部内容通过引用包含于此。
技术领域
本公开涉及无线通信技术领域，特别是涉及一种解调方法、装置、终端及系统。
背景技术
移动通信系统是指运营商通过部署无线接入网设备(如基站)和核心网设备(如归属位置寄存器，Home Location Register，HLR)等，为用户终端(如手机)提供通信服务的系统。其中，移动通信系统经历了第一代、第二代、第三代和第四代。第一代移动通信系统是指最初的模拟、仅限语音通话的蜂窝电话标准，主要采用的是模拟技术和频分多址(Frequency Division Multiple Access，FDMA)的接入方法；第二代移动通信系统引入了数字技术，提高了网络容量，改善了话音质量和保密性，以“全球移动通信系统”(Global System for Mobile Communication，GSM)和“码分多址”(Code Division Multiple Access，CDMA IS-95)为代表；第三代移动通信系统主要是指CDMA2000、WCDMA和TD-SCDMA三种技术，均是以码分多址作为接入技术；第四代移动通信系统的标准在国际上相对统一，为国际标准化组织3GPP制定的长期演进(Long Term Evolution/Long Term Evolution-Advanced，LTE/LTE-A)，其下行基于正交频分多直接入(Orthogonal Frequency Division Multiple Access，OFDMA)、上行基于单载波频分多直接入(Single Carrier-Frequency Division Multiple Access，SC-FDMA)的接入方式，依据灵活的带宽和自适应的调制编码方式，达到了下行峰值速率1Gbps、上行峰值速率500Mbps的高速传输。
MulteFire标准在LTE R13 LAA下行传输方法的基础上，对上行传输方法 进行了定义，并且通过技术增强可以独立工作于非授权频段。
由于MulteFire标准工作于非授权频段，也引入了和WiFi类似的先听后说(Listen Before Talk，LBT)的技术，以保证其和其它用于非授权频段的技术(如WiFi)共存。为了保证在LBT的条件下，用于同步的发现参考信号(Discovery Reference Signal，DRS)有足够的发送机会，MulteFire标准定义了DRS传输窗(DRS Transmission Window，DTxW)，所述DTxW为小区尝试发送DRS的一个周期性窗口。具体的，所述DTxW的发送周期最小为40ms，发送的窗口长度为1-10ms，由小区进行配置。
为了使MulteFire标准可以独立工作于非授权频段，对以下物理层技术进行了增强设计：
一、同步信号
所述同步信号主要包括主同步信号(Primary Synchronization Signals，PSS)、副同步信号(Secondary Synchronization Signals，SSS)、增强主同步信号(enhanced Primary Synchronization Signals，ePSS)和增强副同步信号(enhanced Secondary Synchronization Signals，eSSS)。其中，所述同步信号可以为DRS的一部分，即在DTxW之内发送，并且，当在子帧0～4发送时，所述SSS的短码为0，当在子帧5～9发送时，所述SSS的短码为1。所述同步信号也可以在DTxW之外的子帧0或5上进行发送。在每个子帧中，PSS在第7个OFDM符号上传输，SSS在第6个OFDM符号上传输，ePSS在第4个OFDM符号上传输，eSSS在第3个OFDM符号上传输。通过增强的设计，所述同步信号可以使用户终端在较低信噪比的情况下，通过一次解调获得时、频同步信息。具体来说，可获得子帧的边界位置，但不能获得子帧号和系统帧号。
二、增强物理广播信道
所述增强物理广播信道(enhanced Physical Broadcast Channel，ePBCH)主要广播主信息块(Master Information Block，MIB)。其中，所述ePBCH可以为DRS的一部分，可以在DTxW之内的任何子帧发送，所述MIB中有3bits指示相对于子帧0或子帧5的子帧偏移量。用户终端通过解调所述3bits的信息，可以获得子帧号。所述ePBCH也可以在DTxW之外的子帧0上进行发送。
另外，与LTE系统相同，所述MIB中还指示了8bits的系统帧号信息，另外 2bits信息通过所述ePBCH的冗余RV版本获得。用户终端通过盲解所述ePBCH的RV版本以及所述MIB中广播的8bits的信息，可以获得系统帧号(System Frame Number，SFN)，完成全部同步操作。为了一次解调时的可靠性，所述ePBCH占据7、8、9、10、11和4号共6个OFDM符号进行发送。
三、增强系统信息块(eSIB)
所述增强系统信息块(enhanced system information block，eSIB)可以为DRS的一部分，可以在DTxW之内的任何子帧发送，与其它DRS占用专用的导频资源不同的是，所述eSIB占用PDSCH资源。所述eSIB也可以在DTxW之外的子帧0上进行发送。
其中，由于在非授权频段，CRS和ePBCH可以在DTxW之内发送也可以在DTxW之外发送，因此发送机会较多，比较灵活，所以用户终端在解调CRS和ePBCH时通常会遇到以下场景：
场景一：当在DTxW之内发送DRS时，如果DRS在0～4号子帧发送，就采用0号子帧对CRS进行加扰，在5～9号子帧发送，就采用5号子帧对CRS进行加扰。用户终端通过解调CRS，可以获得系统的信道估计结果，进而解调获得增强物理广播信道(enhanced Physical Broadcast Channel，ePBCH)、物理下行控制信道(Physical Downlink Control Channel，PDCCH)以及对应的物理下行共享信道(Physical Downlink Shared Channel，PDSCH)。当在DTxW之内发送单播数据时，则根据发送CRS的子帧编号对CRS进行加扰。由于用户终端并不知道在DTxW之内发送的是DRS还是单播数据，所以，用户终端需要采用多种加扰假设对CRS进行盲解，大大提高了解调的复杂度，增加了功率消耗。
场景二：在MulteFire标准中，ePBCH可以在DTxW之内任何一个子帧上发送，也可以在DTxW之外子帧0上发送。ePBCH传输的RV版本有4种：RV0、RV1、RV2和RV3。小区在发送ePBCH时，在SFN mod 4(SFN除以4取余数)＝x的时间发送的ePBCH的RV版本为RVx。但是，用户终端在解调ePBCH之前，首先不知道该时刻是否在DTxW之内，其次也不知道对应的SFN值。因此，参见图5A所示，用户终端需要对所有的时刻按照所有RV版本盲解ePBCH，提高了解调的复杂度，增加了功率消耗。
也就是说，当前在对CRS以及ePBCH进行解调时，需要有多种假设进行解调，导致解调复杂度高，增加功率消耗。
发明内容
本公开的目的在于提供一种解调方法、装置、终端及系统，以解决相关技术中在非授权频段，包括CRS和ePBCH的信息的解调常有多种假设，导致解调复杂度高，增加功率消耗的问题。
为了实现上述的目的，本公开实施例提供一种解调方法，包括：
获取一小区的通信信息；
对所述通信信息中的同步信号进行盲解，得到一盲解结果；
根据所述盲解结果，确定所述通信信息携带的时间范围信息；
根据所述时间范围信息，对所述通信信息进行解调。
另一方面，本公开实施例还提供一种解调装置，包括：
获取模块，用于获取一小区的通信信息；
盲解模块，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果；
确定模块，用于根据所述盲解结果，确定所述通信信息携带的时间范围信息；
解调模块，用于根据所述时间范围信息，对所述通信信息进行解调。
另一方面，本公开实施例还提供一种终端，包括上述的解调装置。
另一方面，本公开实施例还提供一种解调系统，包括：
接收机，用于接收一小区的通信信息；
处理器，与所述接收机连接，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息携带的时间范围信息，根据所述时间范围信息，对所述通信信息进行解调。
通过本公开的上述技术方案，本公开的有益效果在于：
上述方案中，通过获取一小区的通信信息，对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息携带的时间范围信息，并根据所述时间范围信息，对所述通信信息进行解调，能 够借助获得的先验信息，确定所述小区的通信信息的一些情况，从而减少解调所述通信信息时的假设，降低解调复杂度，减少功率消耗。
附图说明
图1表示本公开第一实施例提供的解调方法的流程图；
图2表示本公开第二实施例提供的解调方法的流程图；
图3表示本公开第三实施例提供的解调方法的流程图；
图4表示本公开第四实施例提供的解调方法的流程图；
图5A表示相关技术中按照所有RV版本盲解ePBCH的示意图；
图5B表示发明第四实施例的利用确定的RV版本盲解ePBCH的示意图；
图6表示本公开第五实施例提供的解调方法的流程图；
图7表示本公开第六实施例提供的解调装置的结构框图；
图8表示本公开第七实施例提供的解调系统的结构框图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
第一实施例
如图1所示，本公开的第一实施例提供一种解调方法，其中，所述解调方法包括如下步骤101至步骤104，详述如下。
步骤101：获取一小区的通信信息。
本公开实施例中，所述解调方法例如应用于手机终端、手持装置、无线调制调解器等，也可以应用于其他能够发送或接收无线信号的设备。所述通信信息具体是工作于非授权频段的终端从对应的小区获取的整个带宽上的信息。
其中，所述通信信息例如包括同步信号、参考信号、广播信号、控制信号和数据信号等。
步骤102：对所述通信信息中的同步信号进行盲解，得到一盲解结果。
本公开实施例中，所述同步信号主要包括主同步信号PSS、副同步信号SSS、增强主同步信号ePSS和增强副同步信号eSSS。其中，所述同步信号可以为DRS的一部分，即在DTxW之内发送，也可以在DTxW之外的子帧0上进行发送。
并且，在每个子帧中，所述同步信号的位置是固定的。一般情况下，所述同步信号处于通信信息的中间频域位置6RB上。
而对所述同步信号进行盲解，主要是为了确定对应小区的一些信息，例如小区标识信息、频率信息等，以减少后续解调的复杂度。
步骤103：根据所述盲解结果，确定所述通信信息携带的时间范围信息。
本公开实施例中，所述时间范围信息例如是参考子帧号、DRS传输窗DTxW和系统帧号SFN的对应关系等，是上述步骤101获取的小区的通信信息中所具有的先验信息，是确定不变的信息。
步骤104：根据所述时间范围信息，对所述通信信息进行解调。
由于所述时间范围信息是确定不变的信息，所以，根据所述时间范围信息，可以确定所述通信信息的一些情况，从而减少解调所述通信信息时的假设，降低解调复杂度。
本公开实施例的解调方法，通过获取一小区的通信信息，对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息携带的时间范围信息，并根据所述时间范围信息，对所述通信信息进行解调，能够借助获得的先验信息，确定所述小区的通信信息的一些情况，从而减少解调所述通信信息时的假设，降低解调复杂度，减少功率消耗。
第二实施例
如图2所示，本公开的第二实施例提供一种解调方法，包括如下步骤201至步骤205，详述如下。
步骤201：获取一小区的通信信息。
本公开实施例中，所述解调方法例如应用于手机终端、手持装置、无线调制调解器等，也可以应用于其他能够发送或接收无线信号的设备。其中，所述通信信息具体是工作于非授权频段的终端从对应的小区获取的整个带宽 上的信息。
步骤202：对所述通信信息中的同步信号进行盲解，得到一盲解结果。
本公开实施例中，所述同步信号主要包括主同步信号PSS、副同步信号SSS、增强主同步信号ePSS和增强副同步信号eSSS。其中，所述同步信号可以为DRS的一部分，即在DTxW之内发送，当在子帧0～4发送时，所述SSS的短码为0，当在子帧5～9发送时，所述SSS的短码为1。所述同步信号也可以在DTxW之外的子帧0或5上进行发送。
具体的，所述步骤202的盲解结果可分为以下几种：(1)所述通信信息的子帧中具有同步信号且SSS的短码为0(表示小区在DTxW之内的0～4号的某一子帧发送的所述通信信息或者在DTxW之外的0号子帧发送的所述通信信息)；(2)所述通信信息的子帧中具有同步信号且SSS的短码为1(表示小区在DTxW之内的5～9号的某一子帧发送的所述通信信息或者在DTxW之外的5号子帧发送的所述通信信息)；(3)所述通信信息的子帧未检测到同步信号。
步骤203：根据所述盲解结果，确定所述通信信息的参考子帧编号。
其中，所述步骤203确定的参考子帧编号可分为以下几种：(1)所述通信信息的子帧中具有同步信号且SSS的短码为0时，确定参考子帧编号为0；(2)所述通信信息的子帧中具有同步信号且SSS的短码为1时，确定参考子帧编号为5；(3)所述通信信息的子帧未检测到同步信号时，确定参考子帧编号为所述通信信息的子帧编号，即当前子帧编号。
步骤204：根据所述参考子帧编号，确定所述通信信息中的CRS的加扰方式。
本公开实施例中，参考子帧编号和加扰方式是对应的。例如，如果确定的参考子帧编号为x，对应的加扰方式就是以在x号子帧发送CRS的情况加扰。
步骤205：根据所述加扰方式，对所述CRS进行解调。
这样，在确定CRS的加扰方式后，就能够知道CRS的加扰方式，从而避免采用多种加扰假设对CRS进行盲解，降低解调的复杂度。
其中，根据确定的加扰方式，还可以进行信道估计，并利用信道估计的 结果，接收并解调增强物理广播信道(enhanced Physical Broadcast Channel，ePBCH)、物理下行控制信道PDCCH和物理下行共享信道PDSCH。
本公开实施例的解调方法，通过获取一小区的通信信息，对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息中的参考子帧编号，根据所述参考子帧编号，确定所述通信信息中的CRS的加扰方式，并根据所述加扰方式，对所述CRS进行解调，能够借助获得的先验信息，确定所述通信信息中的CRS的加扰方式，从而减少解调CRS时的加扰假设，降低解调复杂度，减少功率消耗。
第三实施例
如图3所示，本公开的第三实施例提供一种解调方法，包括如下步骤301至步骤304，详述如下。
步骤301：获取一小区的通信信息。
本公开实施例中，所述解调方法例如应用于手机终端、手持装置、无线调制调解器等，也可以应用于其他能够发送或接收无线信号的设备。其中，所述通信信息具体是工作于非授权频段的终端从对应的小区获取的整个带宽上的信息。
步骤302：对所述通信信息中的同步信号进行盲解，得到一盲解结果，同时，根据与所述通信信息的子帧编号对应的加扰方式，对所述通信信息中的CRS进行解调。
本公开实施例中，所述同步信号主要包括主同步信号PSS、副同步信号SSS、增强主同步信号ePSS和增强副同步信号eSSS。其中，所述同步信号可以为DRS的一部分，即在DTxW之内发送，当在子帧0～4发送时，所述SSS的短码为0，当在子帧5～9发送时，所述SSS的短码为1。所述同步信号也可以在DTxW之外的子帧0或5上进行发送。
具体的，所述步骤302的盲解结果可分为以下几种：(1)所述通信信息的子帧中具有同步信号且SSS的短码为0(表示小区在DTxW之内的0～4号的某一子帧发送的所述通信信息或者在DTxW之外的0号子帧发送的所述通信信息)；(2)所述通信信息的子帧中具有同步信号且SSS的短码为1(表示小区在DTxW之内的5～9号的某一子帧发送的所述通信信息或者在DTxW 之外的5号子帧发送的所述通信信息)；(3)所述通信信息的子帧未检测到同步信号。
其中，与所述通信信息的子帧编号对应的加扰方式为，以在与所述通信信息的子帧编号相同的子帧发送CRS的情况加扰。
步骤303：如果所述盲解结果为所述通信信息的子帧中具有同步信号，确定所述通信信息的参考子帧编号为0或5。
本公开实施例中，当所述通信信息的子帧中具有同步信号且SSS的短码为0时，确定参考子帧编号为0；所述通信信息的子帧中具有同步信号且SSS的短码为1时，确定参考子帧编号为5。
其中，当所述盲解结果为所述通信信息的子帧未检测到同步信号时，解调完成，不进行后续的处理。
步骤304：根据与所述参考子帧编号0或5对应的加扰方式，对所述通信信息中的CRS进行重新解调。
具体的，与所述参考子帧编号0或5对应的加扰方式为：以在0或5号子帧发送CRS的情况加扰。
本公开实施例的解调方法，通过获取一小区的通信信息，对所述通信信息中的同步信号进行盲解，得到一盲解结果，同时，根据与所述通信信息的子帧编号对应的加扰方式，对所述通信信息中的CRS进行解调，如果所述盲解结果为所述通信信息的子帧中具有同步信号，确定所述通信信息的参考子帧编号为0或5，根据与所述参考子帧编号0或5对应的加扰方式，对所述通信信息中的CRS进行重新解调，不仅能够减少解调CRS时的加扰假设，还能够减少解调时间，降低解调复杂度，减少功率消耗。
第四实施例
如图4所示，本公开的第四实施例提供一种解调方法，包括如下步骤401至步骤405，详述如下。
步骤401：获取一小区的通信信息。
本公开实施例中，所述解调方法例如应用于手机终端、手持装置、无线调制调解器等，也可以应用于其他能够发送或接收无线信号的设备。其中，所述通信信息具体是工作于非授权频段的终端从对应的小区获取的整个带宽 上的信息。
步骤402：对所述通信信息中的同步信号进行盲解，得到小区标识信息。
本公开实施例中，所述同步信号主要包括主同步信号PSS、副同步信号SSS、增强主同步信号ePSS和增强副同步信号eSSS。其中，所述同步信号可以为DRS的一部分，即在DTxW之内发送，也可以在DTxW之外的子帧0上进行发送。
具体的，所述小区标识信息例如为小区标识Cell ID、PSS值、SSS值等，本公开不对其进行限制。
步骤403：根据所述小区标识信息，确定DRS传输窗DTxW和系统帧号SFN的对应关系。
本公开实施例中，通过所述小区标识信息，可计算获得DTxW和SFN的对应关系。例如，当所述小区标识信息为小区标识Cell ID时，Cell ID mod 4(Cell ID除以4取余数)的结果可作为SFN mod 4的结果，SFN为DTxW可传输的系统帧号。
举例来说，Cell ID为11，则Cell ID mod 4为3；那么，SFN mod 4为3，也就是说，DTxW可在为3、7、11……的SFN上传输。
步骤404：根据所述DTxW和SFN的对应关系，确定所述通信信息中的增强物理广播信道ePBCH的冗余RV版本。
本公开实施例中，ePBCH传输的RV版本有4种：RV0、RV1、RV2和RV3。小区在发送ePBCH时，在SFN mod 4＝x的时间发送的ePBCH的RV版本为RVx。所以，根据所述DTxW和SFN的对应关系，可确定ePBCH的RV版本。
例如，当SFN mod 4为3，即DTxW可在为3、7、11……的SFN上传输时，对应的ePBCH的RV版本只能为RV3。
另外，ePBCH也可以在DTxW之外子帧0上发送。
步骤405：根据所述RV版本，对所述ePBCH进行解调。
这样，在确定ePBCH的RV版本后，就能够知道在DTxW之内传输的ePBCH的RV版本，从而避免采用多种RV版本对ePBCH进行盲解，降低解调的复杂度。
例如，在确定RV版本为RV3后，参见图5B所示，对ePBCH的解调只需在所有时刻按照RV3盲解，在子帧0上盲解所有的RV版本即可，相比于图5A所示的解调方式，能够减少RV版本假设。
本公开实施例的解调方法，通过获取一小区的通信信息，对所述通信信息中的同步信号进行盲解，得到小区标识信息，根据所述小区标识信息，确定DTxW和SFN的对应关系，根据所述DTxW和SFN的对应关系，确定所述通信信息中的ePBCH的RV版本，并根据所述RV版本，对所述ePBCH进行解调，能够借助获得的先验信息，确定所述通信信息中的ePBCH的RV版本，从而减少解调ePBCH时的RV版本假设，降低解调复杂度，减少功率消耗。
第五实施例
如图6所示，本公开的第五实施例提供一种解调方法，包括如下步骤601至步骤605，详述如下。
步骤601：获取一小区的通信信息。
本公开实施例中，所述解调方法例如应用于手机终端、手持装置、无线调制调解器等，也可以应用于其他能够发送或接收无线信号的设备。其中，所述通信信息具体是工作于非授权频段的终端从对应的小区获取的整个带宽上的信息。
步骤602：对所述通信信息中的同步信号进行盲解，得到频率信息。
本公开实施例中，所述同步信号主要包括主同步信号PSS、副同步信号SSS、增强主同步信号ePSS和增强副同步信号eSSS。其中，所述同步信号可以为DRS的一部分，即在DTxW之内发送，也可以在DTxW之外的子帧0上进行发送。
具体的，所述频率信息例如为中心频点EARFCN值、中心频率值、特定频率值、特定频率偏移量等等，本公开不对其进行限制。
步骤603：根据所述频率信息，确定DTxW和SFN的对应关系。
本公开实施例中，通过所述频率信息，可计算获得DTxW和SFN的对应关系。例如，当所述频率信息为EARFCN值时，EARFCN mod 4(EARFCN除以4取余数)的结果可作为SFN mod 4的结果，SFN为DTxW可传输的系 统帧号。
举例来说，EARFCN为11，则EARFCN mod 4为3；那么，SFN mod 4为3，也就是说，DTxW可在为3、7、11……的SFN上传输。
步骤604：根据所述DTxW和SFN的对应关系，确定所述通信信息中的ePBCH的RV版本。
本公开实施例中，ePBCH传输的RV版本有4种：RV0、RV1、RV2和RV3。小区在发送ePBCH时，在SFN mod 4＝x的时间发送的ePBCH的RV版本为RVx。所以，根据所述DTxW和SFN的对应关系，可确定ePBCH的RV版本。
例如，当SFN mod 4为3，即DTxW可在为3、7、11……的SFN上传输时，对应的ePBCH的RV版本只能为RV3。
另外，ePBCH也可以在DTxW之外子帧0上发送。
步骤605：根据所述RV版本，对所述ePBCH进行解调。
这样，在确定ePBCH的RV版本后，就能够知道在DTxW之内传输的ePBCH的RV版本，从而避免采用多种RV版本对ePBCH进行盲解，降低解调的复杂度。
例如，在确定RV版本为RV3时，参见图5B所示，对ePBCH的解调只需在所有时刻按照RV3盲解，在子帧0上盲解所有的RV版本即可，相比于图5A所示的解调方式，能够减少RV版本假设。
值得说明的是，在确定DTxW和SFN的对应关系时，除了根据第四实施例中的小区标识信息，或第五实施例中的频率信息之外，进一步的，还可根据所述小区标识信息和频率信息，即两者的结合，确定所述DTxW和SFN的对应关系，以提高准确性。
本公开实施例的解调方法，通过获取一小区的通信信息，对所述通信信息中的同步信号进行盲解，得到频率信息，根据所述频率信息，确定DTxW和SFN的对应关系，根据所述DTxW和SFN的对应关系，确定所述通信信息中的ePBCH的RV版本，并根据所述RV版本，对所述ePBCH进行解调，能够借助获得的先验信息，确定所述通信信息中的ePBCH的RV版本，从而减少解调ePBCH时的RV版本假设，降低解调复杂度，减少功率消耗。
第六实施例
如图7所示，本公开的第六实施例提供一种解调装置，包括：
获取模块71，用于获取一小区的通信信息；
盲解模块72，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果；
确定模块73，用于根据所述盲解结果，确定所述通信信息携带的时间范围信息；
解调模块74，用于根据所述时间范围信息，对所述通信信息进行解调。
其中，所述时间范围信息包括参考子帧编号。
进一步的，所述解调模块包括：
第一确定单元，用于根据所述参考子帧编号，确定所述通信信息中的小区参考信号CRS的加扰方式；
第一解调单元，用于根据所述加扰方式，对所述CRS进行解调。
具体的，所述盲解结果为小区标识信息和频率信息中的至少一者。
进一步的，所述确定模块具体用于：
当所述盲解结果为小区标识信息时，根据所述小区标识信息，确定DRS传输窗DTxW和系统帧号SFN的对应关系；或者
当所述盲解结果为频率信息时，根据所述频率信息，确定DTxW和SFN的对应关系；或者
当所述盲解结果为小区标识信息和频率信息时，根据所述小区标识信息和频率信息，确定DTxW和SFN的对应关系。
进一步的，所述解调模块包括：
第二确定单元，用于根据所述DTxW和SFN的对应关系，确定所述通信信息中的增强物理广播信道ePBCH的冗余RV版本；
第二解调单元，用于根据所述RV版本，对所述ePBCH进行解调。
此外，本公开实施例还提供一种终端，包括上述的解调装置。
本公开的该装置实施例是与上述方法的实施例对应的装置，上述方法实施例中的所有实现手段均适用于该装置的实施例中，也能达到相同的技术效果。
第七实施例
如图8所示，本公开的第七实施例提供一种解调系统，包括：
接收机81，用于接收一小区的通信信息；
处理器82，与所述接收机连接，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息携带的时间范围信息，根据所述时间范围信息，对所述通信信息进行解调。
本公开的解调系统可实现上述装置实施例中所有模块实现的功能，也能达到和上述装置实施例所能达到的相同的技术效果。
以上结合具体实施例描述了本公开的基本原理，但是，需要指出的是，对本领域的普通技术人员而言，能够理解本公开的方法和装置的全部或者任何步骤或者部件，可以在任何计算装置(包括处理器、存储介质等)或者计算装置的网络中，以硬件、固件、软件或者它们的组合加以实现，这是本领域普通技术人员在阅读了本公开的说明的情况下运用他们的基本编程技能就能实现的。
因此，本公开的目的还可以通过在任何计算装置上运行一个程序或者一组程序来实现。所述计算装置可以是公知的通用装置。因此，本公开的目的也可以仅仅通过提供包含实现所述方法或者装置的程序代码的程序产品来实现。也就是说，这样的程序产品也构成本公开，并且存储有这样的程序产品的存储介质也构成本公开。显然，所述存储介质可以是任何公知的存储介质或者将来所开发出来的任何存储介质。还需要指出的是，在本公开的装置和方法中，显然，各部件或各步骤是可以分解和/或重新组合的。这些分解和/或重新组合应视为本公开的等效方案。并且，执行上述系列处理的步骤可以自然地按照说明的顺序按时间顺序执行，但是并不需要一定按照时间顺序执行。某些步骤可以并行或彼此独立地执行。
A1.一种解调方法，包括：
获取一小区的通信信息；
对所述通信信息中的同步信号进行盲解，得到一盲解结果；
根据所述盲解结果，确定所述通信信息携带的时间范围信息；
根据所述时间范围信息，对所述通信信息进行解调。
A2.根据A1所述的解调方法，其中，所述时间范围信息包括参考子帧编号。
A3.根据A2所述的解调方法，其中，所述根据所述时间范围信息，对所述通信信息进行解调的步骤包括：
根据所述参考子帧编号，确定所述通信信息中的小区参考信号CRS的加扰方式；
根据所述加扰方式，对所述CRS进行解调。
A4.根据A1所述的解调方法，其中，所述盲解结果为小区标识信息和频率信息中的至少一者。
A5.根据A4所述的解调方法，其中，所述根据所述盲解结果，确定所述通信信息携带的时间范围信息的步骤包括：
当所述盲解结果为小区标识信息时，根据所述小区标识信息，确定发现参考信号DRS传输窗DTxW和系统帧号SFN的对应关系；或者
当所述盲解结果为频率信息时，根据所述频率信息，确定DTxW和SFN的对应关系；或者
当所述盲解结果为小区标识信息和频率信息时，根据所述小区标识信息和频率信息，确定DTxW和SFN的对应关系。
A6.根据A5所述的解调方法，其中，所述根据所述时间范围信息，对所述通信信息进行解调的步骤包括：
根据所述DTxW和SFN的对应关系，确定所述通信信息中的增强物理广播信道ePBCH的冗余RV版本；
根据所述RV版本，对所述ePBCH进行解调。
A7.一种解调装置，包括：
获取模块，用于获取一小区的通信信息；
盲解模块，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果；
确定模块，用于根据所述盲解结果，确定所述通信信息携带的时间范围信息；
解调模块，用于根据所述时间范围信息，对所述通信信息进行解调。
A8.根据A7所述的解调装置，其中，所述时间范围信息包括参考子帧编号。
A9.根据A8所述的解调装置，其中，所述解调模块包括：
第一确定单元，用于根据所述参考子帧编号，确定所述通信信息中的小区参考信号CRS的加扰方式；
第一解调单元，用于根据所述加扰方式，对所述CRS进行解调。
A10.根据A7所述的解调装置，其中，所述盲解结果为小区标识信息和频率信息中的至少一者。
A11.根据A10所述的解调装置，其中，所述确定模块具体用于：
当所述盲解结果为小区标识信息时，根据所述小区标识信息，确定DRS传输窗DTxW和系统帧号SFN的对应关系；或者
当所述盲解结果为频率信息时，根据所述频率信息，确定DTxW和SFN的对应关系；或者
当所述盲解结果为小区标识信息和频率信息时，根据所述小区标识信息和频率信息，确定DTxW和SFN的对应关系。
A12.根据A11所述的解调装置，其中，所述解调模块包括：
第二确定单元，用于根据所述DTxW和SFN的对应关系，确定所述通信信息中的增强物理广播信道ePBCH的冗余RV版本；
第二解调单元，用于根据所述RV版本，对所述ePBCH进行解调。
A13.一种终端，包括上述A7-A12中任一所述的解调装置。
A14.一种解调系统，包括：
接收机，用于接收一小区的通信信息；
处理器，与所述接收机连接，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息携带的时间范围信息，根据所述时间范围信息，对所述通信信息进行解调。

Claims (14)

  1. 一种解调方法，包括：
    获取一小区的通信信息；
    对所述通信信息中的同步信号进行盲解，得到一盲解结果；
    根据所述盲解结果，确定所述通信信息携带的时间范围信息；
    根据所述时间范围信息，对所述通信信息进行解调。
  2. 根据权利要求1所述的解调方法，其中，所述时间范围信息包括参考子帧编号。
  3. 根据权利要求2所述的解调方法，其中，所述根据所述时间范围信息，对所述通信信息进行解调的步骤包括：
    根据所述参考子帧编号，确定所述通信信息中的小区参考信号CRS的加扰方式；
    根据所述加扰方式，对所述CRS进行解调。
  4. 根据权利要求1所述的解调方法，其中，所述盲解结果为小区标识信息和频率信息中的至少一者。
  5. 根据权利要求4所述的解调方法，其中，所述根据所述盲解结果，确定所述通信信息携带的时间范围信息的步骤包括：
    当所述盲解结果为小区标识信息时，根据所述小区标识信息，确定发现参考信号DRS传输窗DTxW和系统帧号SFN的对应关系；或者
    当所述盲解结果为频率信息时，根据所述频率信息，确定DTxW和SFN的对应关系；或者
    当所述盲解结果为小区标识信息和频率信息时，根据所述小区标识信息和频率信息，确定DTxW和SFN的对应关系。
  6. 根据权利要求5所述的解调方法，其中，所述根据所述时间范围信息，对所述通信信息进行解调的步骤包括：
    根据所述DTxW和SFN的对应关系，确定所述通信信息中的增强物理广播信道ePBCH的冗余RV版本；
    根据所述RV版本，对所述ePBCH进行解调。
  7. 一种解调装置，包括：
    获取模块，用于获取一小区的通信信息；
    盲解模块，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果；
    确定模块，用于根据所述盲解结果，确定所述通信信息携带的时间范围信息；
    解调模块，用于根据所述时间范围信息，对所述通信信息进行解调。
  8. 根据权利要求7所述的解调装置，其中，所述时间范围信息包括参考子帧编号。
  9. 根据权利要求8所述的解调装置，其中，所述解调模块包括：
    第一确定单元，用于根据所述参考子帧编号，确定所述通信信息中的小区参考信号CRS的加扰方式；
    第一解调单元，用于根据所述加扰方式，对所述CRS进行解调。
  10. 根据权利要求7所述的解调装置，其中，所述盲解结果为小区标识信息和频率信息中的至少一者。
  11. 根据权利要求10所述的解调装置，其中，所述确定模块具体用于：
    当所述盲解结果为小区标识信息时，根据所述小区标识信息，确定DRS传输窗DTxW和系统帧号SFN的对应关系；或者
    当所述盲解结果为频率信息时，根据所述频率信息，确定DTxW和SFN的对应关系；或者
    当所述盲解结果为小区标识信息和频率信息时，根据所述小区标识信息和频率信息，确定DTxW和SFN的对应关系。
  12. 根据权利要求11所述的解调装置，其中，所述解调模块包括：
    第二确定单元，用于根据所述DTxW和SFN的对应关系，确定所述通信信息中的增强物理广播信道ePBCH的冗余RV版本；
    第二解调单元，用于根据所述RV版本，对所述ePBCH进行解调。
  13. 一种终端，包括上述权利要求7-12中任一所述的解调装置。
  14. 一种解调系统，包括：
    接收机，用于接收一小区的通信信息；
    处理器，与所述接收机连接，用于对所述通信信息中的同步信号进行盲解，得到一盲解结果，根据所述盲解结果，确定所述通信信息携带的时间范围信息，根据所述时间范围信息，对所述通信信息进行解调。
PCT/CN2017/079461 2016-04-08 2017-04-05 解调方法、装置、终端及系统 WO2017173981A1 (zh)

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