WO2018137230A1 - 非授权频谱上drs传输方法及装置 - Google Patents

非授权频谱上drs传输方法及装置 Download PDF

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Publication number
WO2018137230A1
WO2018137230A1 PCT/CN2017/072720 CN2017072720W WO2018137230A1 WO 2018137230 A1 WO2018137230 A1 WO 2018137230A1 CN 2017072720 W CN2017072720 W CN 2017072720W WO 2018137230 A1 WO2018137230 A1 WO 2018137230A1
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epss
pss
drs
base station
downlink subframe
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PCT/CN2017/072720
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English (en)
French (fr)
Inventor
李志军
韩金侠
任占阳
李振宇
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华为技术有限公司
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Priority to PCT/CN2017/072720 priority Critical patent/WO2018137230A1/zh
Publication of WO2018137230A1 publication Critical patent/WO2018137230A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation

Definitions

  • the present application relates to communication technologies, and in particular, to a method and a device for transmitting a Discovery Reference Signal (DRS) on an unlicensed spectrum.
  • DRS Discovery Reference Signal
  • unlicensed frequency is mainly used by Wireless Fidelity (WIFI) system.
  • WIFI Wireless Fidelity
  • the spectrum regulations require that each network element needs to perform a Listen-Before-Talk (LBT) or Clear Channel Assessment (CCA) before sending data. That is, the detection channel can be sent only after it is idle.
  • LBT Listen-Before-Talk
  • CCA Clear Channel Assessment
  • the maximum duration of the channel can be transmitted. For example, the transmission Opportunity (TXOP) or the Max Continuous Occupied Time (MCOT) cannot be exceeded.
  • the duration of a TXOP or MCOT can be 10 ms. 8ms and so on.
  • the spectrum regulations stipulate that the power spectrum of each wireless transmitting unit cannot exceed the threshold at the unlicensed frequency.
  • each wireless transmitting unit The maximum transmit power cannot exceed 23dBm, and the maximum power spectral density cannot exceed 10dBm/MHz.
  • a base station eNodeB
  • UEs User Equipments
  • the base station needs to schedule multiple UEs at the same time, which causes the downlink transmission power to be shared among multiple UEs.
  • DRS is defined in the LTE standard.
  • Figure 1 shows the signals included in the DRS.
  • the signals included in the DRS include: a Physical Downlink Control Channel (PDCCH), a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), and a physical broadcast channel. (Physical Broadcast Channel, PBCH).
  • Figure 2 shows the signals included in the DRS in the MF system. As shown in FIG. 2, the DRS in the MF system adds an Enhanced Primary Synchronization Signal (ePSS) and an Enhanced Secondary Synchronization Signal (eSSS), which is equivalent to having two primary synchronization signals and two copies. Secondary sync signal.
  • ePSS Enhanced Primary Synchronization Signal
  • eSSS Enhanced Secondary Synchronization Signal
  • the base station transmits a DRS to the user equipment.
  • the UE identifies the DRS and can obtain two primary synchronization signals (ePSS/PSS) when identifying.
  • two auxiliary synchronization signals (eSSS/SSS) jointly processing the two primary synchronization signals and the two secondary synchronization signals respectively, can obtain joint processing gain, thereby realizing the coverage enhancement of PSS and SSS in DRS, theoretically There is a 3dB coverage gain.
  • an enhanced physical broadcast channel ePBCH
  • MF enhanced physical broadcast channel
  • the PBCH is repeated 4 times in the subframe, and in Fig. 2, after the ePBCH is defined, the ePBCH is in the Nearly 6 repetitions are achieved in the sub-frame, and theoretically 1.7 dB coverage enhancement can be obtained.
  • the PSS and SSS are repeated in the current downlink subframe by ePSS and eSSS, and the extension of the PBCH occupied symbol is limited by the current downlink subframe resource: 12 current DRS is occupied.
  • the bandwidth of the central resource block (RB) can be repeated only once
  • the SSS can only be repeated once
  • the ePBCH can only be extended to occupy 6 symbols. That is to say, the coverage enhancement in the above manner is strictly limited by the 6 RB resources in the center of the current downlink subframe, and the improvement of the coverage gain is very limited.
  • the present application provides an unlicensed spectrum on-DRS transmission method and apparatus to further improve coverage gain.
  • the present application provides a method for transmitting a DRS on an unlicensed spectrum, including: transmitting, by a base station, a first DRS to a UE on a first resource of a current downlink subframe, where the first DRS includes: a first ePSS, a PSS, an SIS, an SSS, an eSSS, and an ePBCH; the base station sends a second DRS to the UE on the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe, where the second DRS and the first DRS Different, the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, and the second resource is different from the first resource, and the time domain is implemented after the base station sends the first DRS on the first resource of the current downlink subframe.
  • the second DRS is sent on the next downlink subframe of the current downlink subframe, or the second DRS is sent on the second resource of the current downlink subframe in the frequency domain, compared to being performed only in one subframe.
  • the method for repeatedly acquiring the coverage gain of the PSS and the SSS, the DRS transmission method on the unlicensed spectrum provided by the present application is not limited by the current downlink subframe resource, thereby further improving the coverage gain.
  • the second DRS includes: a first ePSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a second ePSS,
  • the second PSS, the SSS, the eSSS, the SIB, and the ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the method further includes: determining, by the base station, a first root index of the ePSS; Determining a first index of the PSS; the base station generates a first ePSS according to the first root index of the ePSS; the base station generates a first PSS according to the first root index of the PSS; the base station processes the first ePSS to generate a second ePSS; A PSS performs processing to generate a second PSS.
  • the base station processes the first ePSS to generate a second ePSS, including:
  • Base station according to formula Processing the first ePSS to generate a second ePSS, where d u1 (n) is the first ePSS, u 1 is the first index of the ePSS; or, the base station according to the formula Processing the first ePSS to generate a second ePSS, where d u1 (n) is the first ePSS, u 1 is the first index of the ePSS.
  • the base station processes the first PSS to generate a second PSS, including:
  • Base station according to formula Processing the first PSS to generate a second PSS, where d u2 (n) is the first PSS, u 2 is the first index of the PSS; or, the base station according to the formula Processing the first PSS to generate a second PSS, where d u2 (n) is the first PSS, u 2 is the first index of the PSS.
  • the method further includes: determining, by the base station, a second root index of the ePSS; Determining a second root index of the PSS; the base station generates a second ePSS according to the second root index of the ePSS; and the base station generates a second PSS according to the second root index of the PSS.
  • the first DRS further includes a cPBCH; the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or, a symbol The first PSS and the first ePSS of one symbol, or the second ePSS of two symbols; or the second PSS of two symbols.
  • the present application provides a method for transmitting a DRS on an unlicensed spectrum, including: receiving, by a UE, a first DRS sent by a base station on a first resource of a current downlink subframe, where the first DRS includes: a first ePSS, The first PSS, the SIB, the SSS, the eSSS, and the ePBCH; the UE receives the second DRS sent by the base station on the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe, where the second DRS and the second The second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, and the second resource is different from the first resource; the UE acquires the coverage gain according to the first DRS and the second DRS.
  • the second DRS includes: a first ePSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a second ePSS,
  • the second PSS, the SSS, the eSSS, the SIB, and the ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the first DRS further includes a cPBCH; the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or, a symbol The first PSS and the first ePSS of one symbol, or the second ePSS of two symbols; or the second PSS of two symbols.
  • the application provides a base station, including: a sending module, configured to send a first DRS to a UE on a first resource of a current downlink subframe, where the first DRS includes: a first ePSS, a first PSS And the sending, the SIB, the SSS, the eSSS, and the ePBCH; the sending module is further configured to send the second DRS to the UE on the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe, where the second DRS is The second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, and the second resource is different from the first resource.
  • a sending module configured to send a first DRS to a UE on a first resource of a current downlink subframe, where the first DRS includes: a first ePSS, a first PSS And the sending, the SIB, the SSS, the eSSS, and the ePBCH; the sending module
  • the second DRS includes: a first ePSS, -SIB, SSS, eSSS, and ePBCH; or, a first PSS, SIB, SSS, eSSS, and ePBCH; or, a second ePSS
  • the second PSS, the SSS, the eSSS, the SIB, and the ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the base station when the second DRS includes: a second ePSS, a second PSS, an SSS, an eSSS, an SIB, and an ePBCH, the base station further includes: a first determining module, configured to determine the ePSS a first index; the first determining module is further configured to determine a first root index of the PSS; the first generating module is configured to generate a first ePSS according to the first root index of the ePSS; the first generating module is further configured to be used according to the PSS An index generates a first PSS; a processing module is configured to process the first ePSS to generate a second ePSS; and the processing module is further configured to process the first PSS to generate a second PSS.
  • a first determining module configured to determine the ePSS a first index
  • the first determining module is further configured to determine a first root index of the PSS
  • the first generating module is configured to generate a first ePSS according to the first
  • the processing module is specifically configured to:
  • the processing module is specifically configured to:
  • the base station when the second DRS includes: a second ePSS, a second PSS, an SSS, an eSSS, an SIB, and an ePBCH, the base station further includes: a second determining module, configured to determine the ePSS a second index; the second determining module is further configured to determine a second root index of the PSS; the second generating module is configured to generate a second ePSS according to the second root index of the ePSS; and the second generating module is further configured to use the second The two indexes generate a second PSS.
  • a second determining module configured to determine the ePSS a second index
  • the second determining module is further configured to determine a second root index of the PSS
  • the second generating module is configured to generate a second ePSS according to the second root index of the ePSS
  • the second generating module is further configured to use the second The two indexes generate a second PSS.
  • the first DRS further includes a cPBCH; the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or, a symbol The first PSS and the first ePSS of one symbol, or the second ePSS of two symbols; or the second PSS of two symbols.
  • the application provides a UE, including: a receiving module, configured to receive a first DRS sent by a base station on a first resource of a current downlink subframe, where the first DRS includes: a first ePSS, a first The PSS, the SIB, the SSS, the eSSS, and the ePBCH; the receiving module is further configured to receive, by the base station, a second DRS sent on a next downlink subframe of the current downlink subframe or a second resource of the current downlink subframe, where the second DRS Different from the first DRS, the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, and the second resource is different from the first resource; and the acquiring module is configured to obtain the coverage gain according to the first DRS and the second DRS.
  • the first DRS includes: a first ePSS, a first The PSS, the SIB, the SSS, the eSSS, and the ePBCH
  • the second DRS includes: a first ePSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a second ePSS,
  • the second PSS, the SSS, the eSSS, the SIB, and the ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the first DRS further includes a cPBCH; the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or, a symbol The first PSS and the first ePSS of one symbol, or the second ePSS of two symbols; or the second PSS of two symbols.
  • the application provides a base station, including: a transceiver; a memory for storing an instruction; and a processor connected to the memory and the transceiver, respectively, for executing an instruction to perform the following steps when executing the instruction:
  • the first DRS is sent to the UE on the first resource of the downlink subframe, where the first DRS includes: a first ePSS, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; and a next downlink subframe in the current downlink subframe.
  • the application provides a UE, including: a transceiver; a memory for storing an instruction; and a processor connected to the memory and the transceiver, respectively, for executing an instruction to perform the following steps when the instruction is executed: receiving the base station a first DRS sent on a first resource of the current downlink subframe, where the first DRS includes: a first ePSS, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; and the receiving base station is in the current downlink subframe.
  • a second DRS sent on a second subframe of the current downlink subframe where the second DRS is different from the first DRS, and the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS.
  • the two resources are different from the first resource; the coverage gain is obtained according to the first DRS and the second DRS.
  • the application provides a communication system, including: any of the base stations provided by the third aspect, and any UE provided by the fourth aspect.
  • the present application provides a computer readable storage medium comprising computer executed instructions for causing a base station to perform the method of the first aspect or the method of any of the possible aspects of the first aspect.
  • the present application provides a computer readable storage medium comprising computer executed instructions for causing a UE to perform the method of the second aspect or the method of any of the possible aspects of the second aspect.
  • Figure 1 shows the signals included in the DRS
  • Figure 2 is a signal included in the DRS in the MF system
  • FIG. 3 is a schematic diagram of an application scenario of a DRS transmission method on an unlicensed spectrum provided by the present application
  • FIG. 4 is a schematic diagram of a process interaction of an embodiment of a DRS transmission method on an unlicensed spectrum provided by the present application;
  • FIG. 5 is a schematic diagram of a first first DRS provided by the present application.
  • FIG. 6 is a schematic diagram of a first type of second DRS provided by the present application.
  • FIG. 7A is a schematic diagram of sending a second DRS in a time domain in an unlicensed spectrum on DRS transmission method provided by the present application.
  • FIG. 7B is a schematic diagram of transmitting a second DRS in a frequency domain in a DRS transmission method on an unlicensed spectrum according to the present application.
  • FIG. 8 is a schematic diagram of a second second DRS provided by the present application.
  • FIG. 9 is a schematic diagram of a third second DRS provided by the present application.
  • FIG. 10 is a schematic diagram of a second first DRS provided by the present application.
  • FIG. 11 is a schematic diagram of a fourth second DRS provided by the present application.
  • FIG. 12 is a schematic structural diagram of Embodiment 1 of a base station according to the present application.
  • FIG. 13 is a schematic structural diagram of Embodiment 1 of a UE provided by the present application.
  • FIG. 14 is a schematic structural diagram of Embodiment 2 of a base station according to the present application.
  • FIG. 15 is a schematic structural diagram of Embodiment 2 of a UE provided by the present application.
  • FIG. 3 is a schematic diagram of an application scenario of a DRS transmission method on an unlicensed spectrum provided by the present application.
  • the DRS transmission method provided by the present application is applied to an LTE base station 31 and a UE 33 that are independently deployed based on unlicensed frequency.
  • the scenario can be, for example, a business, a factory, a workshop, a warehouse, and the like.
  • the signal strength of the base station 31 received by the UE 33 is weakened, so that normal communication with the base station 31 cannot be achieved.
  • coverage enhancement is required to improve the reliability of communication between the UE 33 and the base station 31.
  • the DRS transmission method provided by the present application is intended to perform enhancement of the DRS signal, so that the UE 33 can acquire the coverage gain of the DRS signal, and the UE 33 can perform downlink synchronization reliably and acquire system information of the base station 31.
  • the DRS transmission method on the unlicensed spectrum provided by the application the first DRS is included in the first DRS by the base station, where the first DRS includes: a first ePSS, a first PSS, and a system message block. (System Information Block, SIB), SSS, eSSS, and Enhanced Physical Broadcast Channel (ePBCH), the base station sends the UE to the UE in the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe.
  • SIB System Information Block
  • eSSS Enhanced Physical Broadcast Channel
  • the DRS transmission method on the unlicensed spectrum provided by the present application is not limited by the current downlink subframe resource, thereby further improving the coverage gain.
  • FIG. 4 is a schematic diagram of a process interaction of an embodiment of a DRS transmission method on an unlicensed spectrum provided by the present application. As shown in FIG. 4, the DRS transmission method provided by the present application includes the following steps:
  • the base station sends the first DRS to the UE on the first resource of the current downlink subframe.
  • the first DRS includes: a first ePSS, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH.
  • the base station preempts the channel after performing the CCA, and if it is determined that the DRS needs to be sent to the UE, the base station is the first of the current downlink subframe in the current channel time (Burst). The first DRS is sent on the resource.
  • the first resource of the current downlink subframe in the present application refers to the RB used to send the first DRS in the bandwidth of the current downlink subframe.
  • the first resource may be 6 RBs.
  • the SIB may be a MulteFire System Message Block (MF-SIB).
  • MF-SIB and the ePBCH in the first DRS are used to enable the UE to acquire system information of the base station, for example, a frequency band transmitted by the base station.
  • the ePSS, PSS, eSSS, and SSS in the first DRS are used to enable the UE to complete downlink synchronization.
  • FIG. 5 is a schematic diagram of a first type of first DRS provided by the present application.
  • the current downlink subframe includes 14 symbols 0-13, the eSSS is located at the 2nd symbol, the first ePSS is located at the 3rd symbol, and the ePBCH is located at the 4th symbol and the 7th to 11th symbols.
  • the SSS is located at the 5th symbol, the first PSS is located at the 6th symbol, and the MF-SIB is located at the 2nd symbol - the 11th symbol.
  • the first type of first DRS there is no signal on the 12th symbol and the 13th symbol of the current downlink subframe.
  • the base station sends a second DRS to the UE on the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe.
  • the second DRS is different from the first DRS, and the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS.
  • the base station may send the second DRS in the time domain or the frequency domain, so as to perform repetition on some signals in the first DRS, so that the UE receives the first DRS and the first After the two DRS, the coverage gain of the DRS is implemented in combination with the first DRS and the second DRS.
  • the second DRS In order for the second DRS sent by the base station not to affect the normal communication of the second UE, the second DRS needs to be different from the first DRS, and the second DRS may enable the first UE to acquire the coverage gain in combination with the first DRS and the second DRS. Since the codebook identifying the second DRS is preset in the first UE, when the second DRS is different from the first DRS, the first UE may combine the first DRS and the second DRS after receiving the second DRS. The coverage gain is obtained, and since the second UE does not recognize the codebook of the second DRS, the second DRS cannot be identified, and thus, no erroneous operation or misjudgment is caused.
  • the second DRS may be different from the first DRS by setting some of the signals in the second DRS to be different from some of the signals in the first DRS or the number of certain signals.
  • three second DRSs different from the first DRS are provided.
  • FIG. 6 is a schematic diagram of a first type of second DRS provided by the present application.
  • the first type of second DRS includes: a first ePSS, an MF-SIB, an SSS, an eSSS, and an ePBCH.
  • the first DRS is different from the first type of second DRS in that: in the first type of second DRS, the first PSS in the first DRS is replaced with the first ePSS, that is, the phase
  • the first ePSS including two symbols is included in the first type of second DRS in FIG. 6 compared to the first ePSS including one symbol and the first DRS of the first PSS of one symbol in FIG.
  • the eSSS is located in the second symbol
  • the first ePSS is located in the third symbol and the sixth symbol
  • the ePBCH is located in the fourth symbol
  • SSS is located in the 5th symbol
  • MF-SIB is located in the 2nd to 11th symbols.
  • FIG. 7A is a schematic diagram of transmitting a second DRS in a time domain in an unlicensed spectrum on DRS transmission method provided by the present application.
  • the base station sends the first DRS on the current downlink subframe n, the next downlink subframe n+1 of the current downlink subframe n in the burst, and the current downlink subframe n.
  • the second DRS is transmitted on the next downlink subframe n+2 of the next downlink subframe n+1.
  • the next downlink subframe of the current downlink subframe in this application refers to the next downlink subframe of the current downlink subframe.
  • the base station may send the first DRS in the current downlink subframe n and the second DRS in the next downlink subframe n+1 of the current downlink subframe; the base station may also In the burst, the first DRS is sent in the current downlink subframe n, and the second DRS is sent in all consecutive downlink subframes after the current downlink subframe n to achieve further coverage gain.
  • the base station transmits a second DRS in two consecutive downlink subframes n+1 and n+2 after the current downlink subframe n in FIG. 7A.
  • the base station after the base station preempts the channel, it is required to determine whether the current downlink subframe n and the next downlink subframe n+1 of the current downlink subframe n can be continuously transmitted in the burst.
  • the base station performs S401 and S402 only when it is determined that the burst can continuously transmit the current downlink subframe n and the next downlink subframe n+1 of the current downlink subframe n.
  • FIG. 7B is a schematic diagram of transmitting a second DRS in a frequency domain in a DRS transmission method on an unlicensed spectrum according to the present application.
  • the base station sends a second DRS on the second resource in the current downlink subframe.
  • the base station transmits a second DRS on both the second resource f1 and the second resource fn in FIG. 7B.
  • the second resource in the present application is an RB that is different from the first resource f0 in that the second DRS is transmitted.
  • the second resource may be 6 RBs.
  • the base station sends a first DRS on the first resource of the current downlink subframe n, and sends a second DRS on the second resource of the current downlink subframe n. It should be noted that the base station may send the second DRS on one second resource, or may send the second DRS on multiple second resources to implement further coverage gain.
  • FIG. 8 is a schematic diagram of a second second DRS provided by the present application.
  • the second DRS includes: a first PSS, an MF-SIB, an SSS, an eSSS, and an ePBCH.
  • the difference between the first DRS and the second second DRS is that: in the second second DRS, the first ePSS in the first DRS is replaced with the first PSS, that is, the phase
  • the first PSS including the first ePSS of one symbol and the first PSS of one symbol of FIG. 5 includes the first PSS of two symbols in the second second DRS of FIG.
  • the eSSS is located in the second symbol
  • the first PSS is located in the third symbol and the sixth symbol
  • the ePBCH is located in the fourth symbol and the seventh to eleventh symbols.
  • the SSS is located at the 5th symbol and the MF-SIB is located at the 2nd to 11th symbols.
  • the second type of second DRS can also be used in both the local and the frequency domain, similar to FIG. 7A and FIG. 7B, and details are not described herein again.
  • FIG. 9 is a schematic diagram of a third second DRS provided by the present application.
  • the third second DRS includes: a second ePSS, a second PSS, an MF-SIB, an SSS, an eSSS, and an ePBCH.
  • the second ePSS in the second DRS is different from the first ePSS
  • the second PSS is different from the first PSS.
  • the difference between the first DRS and the third second DRS is that the first PSS in the first DRS is replaced by the second PSS in the third second DRS, which will be the first The first ePSS in the DRS is replaced by the second ePSS.
  • the eSSS is located in the second symbol
  • the second ePSS is located in the third symbol
  • the ePBCH is located in the fourth symbol, the seventh to eleventh symbols
  • the second PSS is located at the 6th symbol
  • the MF-SIB is located at the 2nd to 11th symbols.
  • the third type of the second DRS can also be used in both the local and the frequency domain, similar to FIG. 7A and FIG. 7B, and details are not described herein again.
  • the first generation manner of the second ePSS and the second PSS is specifically: the base station determines the first root index of the ePSS; the base station determines the first root index of the PSS; the base station generates the first ePSS according to the first root index of the ePSS; the base station according to the PSS The first index generates a first PSS; the base station processes the first ePSS to generate a second ePSS; and the base station processes the first PSS to generate a second PSS.
  • the first ePSS is generated according to the first root index of the ePSS
  • the second ePSS is generated according to the first ePSS
  • the PSS is determined.
  • the first index, the first PSS is generated according to the first index of the PSS
  • the second PSS is generated according to the first PSS.
  • the base station may determine the first root index of the ePSS according to the ePSS root index table defined in the MF protocol, and determine the first root index of the PSS according to the PSS root index table defined in the MF protocol.
  • Table 1 is the root index table of the ePSS defined in the MF protocol.
  • Table 2 is the root index table of the PSS defined in the MF protocol.
  • N ID (2) represents the identity of the cell.
  • the base station determines the first root index of the ePSS and the first root index of the PSS according to Table 1, Table 2, and the pre-configured cell identifier. After that, the base station according to the formula: A first ePSS and a first PSS are generated. In this formula, when u is the first root index u 1 of the ePSS, the first ePSS d u1 (n) is generated; when u is the first index u 2 of the PSS, the first is generated. PSS d u2 (n), ie: After that, the base station processes the first ePSS and the first PSS, and the specific process is as follows:
  • the first ePSS is processed to generate a second ePSS.
  • the base station according to the formula The first ePSS is processed to generate a second ePSS.
  • d u1 (n) represents the first ePSS.
  • the base station according to the formula The first PSS is processed to generate a second PSS.
  • the base station according to the formula The first PSS is processed to generate a second PSS.
  • d u2 (n) represents the first PSS.
  • the second ePSS generated according to the above method is different from the first ePSS, and the second PSS is different from the first PSS, thereby implementing the second DRS different from the first DRS. Furthermore, the second ePSS has excellent cross-correlation properties with the first ePSS and has good autocorrelation properties with itself; the second PSS has excellent cross-correlation properties with the first PSS, and has good correlation with itself. The autocorrelation property, thus, achieves a more efficient way to make the second DRS different from the first DRS.
  • the second generation manner of the second ePSS and the second PSS is specifically: the base station determines a second root index of the ePSS; the base station determines a second root index of the PSS; the base station generates a second ePSS according to the second root index of the ePSS; the base station according to the PSS
  • the second root index generates a second PSS. It should be noted that, in the foregoing process, as long as it is determined that there is a timing relationship between the second root index of the ePSS and the second ePSS according to the second root index of the ePSS, and determining The second root index of the PSS may have a timing relationship with the second PSS generated according to the second root index of the PSS.
  • the base station may determine the second root index of the ePSS according to the root index table of the predefined ePSS, and determine the second root index of the PSS according to the root index table of the predefined PSS.
  • the root index table of the pre-defined ePSS involved here is different from the root index of the ePSS in the root index table of the ePSS defined in the MF protocol, and the root index table and the MF protocol of the pre-defined PSS involved herein are different.
  • the root index of the PSS in the root index table of the defined PSS is different.
  • Table 3 shows the value of the optional root index u.
  • two sets of values can be taken from Table 3 as the root index table of the ePSS and the root index table of the PSS, respectively.
  • Table 4 is a root index table of the predefined ePSS.
  • Table 5 is a table of root indices for pre-defined PSS.
  • Table 4 pre-defined ePSS root index table
  • Table 6 is a root index table of another ePSS defined in advance.
  • Table 7 is a root index table of another PSS defined in advance.
  • Table 6 pre-defined another ePSS root index table
  • Table 7 is a pre-defined root index table for another PSS
  • the base station After determining the second index of the ePSS and the second index of the PSS according to Table 4 and Table 5 or Table 6 and Table 7, the base station can according to the formula A second ePSS and a second PSS are generated.
  • the formula when u is the second index of the ePSS, the second ePSS is generated; when u is the second index of the PSS, the second PSS is generated.
  • Table 4 and Table 5 are two sets of values selected from Table 3.
  • the sequence corresponding to the root index listed in Table 3 has good cross-correlation performance with the corresponding sequences in Tables 1 and 2, and the second DRS is more effectively different from the first DRS.
  • FIG. 10 is a schematic diagram of a second first DRS provided by the present application.
  • the first DRS further includes: a compressed physical broadcast channel (cPBCH).
  • cPBCH compressed physical broadcast channel
  • the fourth DRS may further include a fourth implementation, where the fourth second DRS includes: a first PSS of two symbols; or a first ePSS of two symbols. Or, a first PSS of one symbol and a first ePSS of one symbol; or a second ePSS of two symbols; or a second PSS of two symbols.
  • the first PSS is located at the 12th symbol and the 13th symbol.
  • the second DRS further includes other signals, the signals are located in the 12th symbol and the 13th symbol, and details are not described herein.
  • the fourth type of the second DRS can also be used in both the local and the frequency domain, similar to FIG. 7A and FIG. 7B, and details are not described herein again.
  • FIG. 11 is a schematic diagram of a fourth second DRS provided by the present application. As shown in Figure 11, there are shown two of the 15 implementations.
  • the second DRS includes: a first ePSS, an MF-SIB, an SSS, an eSSS, and an ePBCH. More specifically, the eSSS is located in the second symbol, the first ePSS is located in the third symbol, the sixth symbol, the twelfth symbol, and the thirteenth symbol, and the ePBCH is located in the fourth symbol, the seventh to eleventh symbols.
  • the second DRS includes: a first PSS, an MF-SIB, an SSS, an eSSS, and an ePBCH. More specifically, the eSSS is located in the second symbol, the first PSS is located in the third symbol, the sixth symbol, the twelfth symbol, and the thirteenth symbol, and the ePBCH is located in the fourth symbol, the seventh to eleventh symbols. , SSS is located in the 5th symbol, and MF-SIB is located in the 2nd to 11th symbols.
  • the MF-SIB in the second DRS is the same as the MF-SIB in the first DRS.
  • the ePBCH in the second DRS is the same as the ePBCH in the first DRS. In this way, the UE can perform the combining process on the ePBCH and the MF-SIB separately after receiving the first DRS and the second DRS, and obtain the coverage gain.
  • S403 The UE receives the first DRS sent by the base station on the first resource of the current downlink subframe.
  • the first DRS includes: a first ePSS, a first PSS, an MF-SIB, an SSS, an eSSS, and an ePBCH.
  • the UE involved in S403-S405 is the first UE supporting the coverage gain.
  • a codebook that can identify the second DRS is preset in the local area of the UE, that is, a local sequence search correlation peak is preset in the UE to identify the first Two DRS.
  • the UE when the signals on the third symbol, the sixth symbol, the twelfth symbol, and the thirteenth symbol are the same, at this time, the UE locally The fewer identifiers required, the UE's resources and power consumption can be saved.
  • S404 The UE receives the second DRS sent by the base station on the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe.
  • the second DRS is different from the first DRS, and the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, where the second resource is different from the first resource.
  • S405 The UE acquires an coverage gain according to the first DRS and the second DRS.
  • the following uses the second DRS as the third type of the second DRS as an example to describe how the UE obtains the coverage gain according to the first DRS and the second DRS.
  • the UE obtains the coverage gain in the following two ways:
  • the UE When the base station sends the first DRS on the first resource of the current downlink subframe, and the second DRS is sent in the next downlink subframe of the current downlink subframe, the UE needs to be the first for each received downlink subframe.
  • the sliding correlation detection of the ePSS, the first PSS, the second ePSS, and the second PPS is as follows:
  • Step 1 If the first ePSS and the first PPS correlation peak are greater than a threshold threshold (Threshold), the current downlink subframe corresponds to the first DRS.
  • a threshold threshold (Threshold)
  • Step 2 If the second ePSS and the second PPS correlation peak are greater than the threshold threshold, the current downlink subframe corresponds to the second DRS.
  • Step 3 If the first ePSS, the first PSS, the second ePSS, and the second PPS of the current downlink subframe are not greater than the threshold threshold, record the first ePSS of the current downlink subframe, the first PSS sliding correlation peak Thr0_0, and the second The ePSS and the second PPS correlation peak Thr1_0 need to continue to perform sliding correlation with the next downlink subframe that is continuous with the current downlink subframe, and record the first ePSS, the first PSS correlation peak Thr0_1, the second ePSS, and the second PPS correlation peak. Thr1_1.
  • Step 4 Calculate the sum of Thr0_0+Thr1_1. If the sum is greater than the threshold threshold (Joint Decision Threshold Union_Threshold), the current downlink subframe is the second DRS, and the previous downlink subframe is the first DRS.
  • threshold threshold Joint Decision Threshold Union_Threshold
  • Step 5 Perform a merge process on the ePBCH corresponding to the first DRS and the second DRS to obtain a merge gain.
  • the MF-SIB can also acquire the combined gain.
  • the UE When the base station sends the first DRS on the first resource of the current downlink subframe, and the second DRS is sent on the second resource of the current downlink subframe, the UE needs to receive the first resource location and the second resource location of each subframe.
  • the resource location is respectively performed as the sliding correlation detection of the first ePSS, the first PSS, the second ePSS, and the second PPS, and the specific process is as follows:
  • Step 1 If the first ePSS and the first PPS correlation peak of the first resource location are greater than a threshold threshold (Threshold), the resource location corresponds to the first DRS.
  • a threshold threshold (Threshold)
  • Step 2 If the second ePSS and the second PPS correlation peak of the second resource location are greater than a threshold threshold, the resource location corresponds to the second DRS.
  • Step 3 If the first resource position and the second resource position sliding correlation peak of the current downlink subframe are not greater than the threshold threshold, record the first ePSS of the first resource position of the current downlink subframe, the first PSS sliding correlation peak Thr0, and the second The resource position is the second ePSS and the correlation peak Thr1 of the second PPS.
  • Step 4 Calculate Thr0+Thr1 and determine if it is greater than the threshold threshold (joint decision threshold Union_Threshold), if it is greater than the threshold, the first resource location is the first DRS, and the second resource location is the second DRS.
  • the threshold threshold joint decision threshold Union_Threshold
  • Step 5 Perform a merge process on the ePBCH corresponding to the first DRS and the second DRS to obtain a merge gain.
  • the MF-SIB can also acquire the combined gain.
  • the first DRS is included in the first DRS by the base station, where the first DRS includes: the first ePSS, the first PSS, the SIB, the SSS And eSSS and ePBCH, the base station sends a second DRS to the UE in the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe, where the second DRS is different from the first DRS, and the second DRS is used by the second DRS.
  • the base station After the UE obtains the coverage gain according to the first DRS and the second DRS, the base station sends the first DRS on the first resource of the current downlink subframe, and sends the next downlink subframe in the current downlink subframe.
  • the second DRS or the method for transmitting the second DRS on the second resource of the current downlink subframe in the frequency domain, compared with the method for repeatedly acquiring the coverage gain of the PSS and the SSS in only one subframe, the method provided by the present application
  • the DRS transmission method on the unlicensed spectrum is not limited by the current downlink subframe resources, thereby further increasing the coverage gain.
  • FIG. 12 is a schematic structural diagram of Embodiment 1 of a base station provided by the present application. As shown in FIG. 12, the base station 120 provided by the present application includes the following modules:
  • the sending module 121 is configured to send the first DRS to the UE on the first resource of the current downlink subframe.
  • the first DRS includes: a first ePSS, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH.
  • the sending module 121 is further configured to send the second DRS to the UE on the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe.
  • the second DRS is different from the first DRS, and the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, where the second resource is different from the first resource.
  • the second DRS includes: a first ePSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a second ePSS, a second PSS, an SSS, an eSSS, SIB and ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the base station further includes: a first determining module, configured to determine a first root index of the ePSS; The module is further configured to determine a first root index of the PSS; the first generating module is configured to generate a first ePSS according to the first root index of the ePSS; the first generating module is further configured to generate a first PSS according to the first root index of the PSS; The processing module is configured to process the first ePSS to generate a second ePSS, and the processing module is further configured to process the first PSS to generate a second PSS.
  • the processing module is specifically used to:
  • the processing module is specifically used to:
  • the base station when the second DRS includes: the second ePSS, the second PSS, the SSS, the eSSS, the SIB, and the ePBCH, the base station further includes: a second determining module, configured to determine a second root index of the ePSS; The module is further configured to determine a second root index of the PSS; the second generating module is configured to generate a second ePSS according to the second root index of the ePSS; and the second generating module is further configured to generate a second PSS according to the second root index of the PSS.
  • a second determining module configured to determine a second root index of the ePSS
  • the module is further configured to determine a second root index of the PSS
  • the second generating module is configured to generate a second ePSS according to the second root index of the ePSS
  • the second generating module is further configured to generate a second PSS according to the second root index of the PSS.
  • the first DRS further includes a cPBCH
  • the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or a first PSS of one symbol and a symbol of the first An ePSS, or a second ePSS of two symbols; or a second PSS of two symbols.
  • the base station provided by the present application is specifically configured to perform the method performed by the base station in the embodiment shown in FIG. 4, and the implementation process and technical principles are similar, and details are not described herein again.
  • the base station provided by the present application is configured to send a first DRS to the UE on the first resource of the current downlink subframe by using a sending module, where the first DRS includes: a first ePSS, a first PSS, an SIB, an SSS, The eSSS and the ePBCH, the sending module is further configured to send the second DRS to the UE on the next downlink subframe of the current downlink subframe or the second resource of the current downlink subframe, where the second DRS is different from the first DRS, where The second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, and the second resource is different from the first resource, and after the base station sends the first DRS on the first resource of the current downlink subframe, the time domain is The second DRS is sent in the next downlink subframe of the current downlink subframe, or the second DRS is sent on the second resource of the current downlink subframe in the frequency domain, compared to PSS and SSS in
  • FIG. 13 is a schematic structural diagram of Embodiment 1 of a UE provided by the present application. As shown in FIG. 13, the UE 130 provided by the present application Includes the following modules:
  • the receiving module 131 is configured to receive a first DRS sent by the base station on the first resource of the current downlink subframe.
  • the first DRS includes: a first ePSS, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH.
  • the receiving module 131 is further configured to receive, by the base station, a second DRS sent on a next downlink subframe of the current downlink subframe or a second resource of the current downlink subframe.
  • the second DRS is different from the first DRS, and the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, where the second resource is different from the first resource.
  • the obtaining module 132 is configured to obtain a coverage gain according to the first DRS and the second DRS.
  • the second DRS includes: a first ePSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a second ePSS, a second PSS, an SSS, an eSSS, SIB and ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the first DRS further includes a cPBCH
  • the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or a first PSS of one symbol and a symbol of the first An ePSS, or a second ePSS of two symbols; or a second PSS of two symbols.
  • the UE provided by the present application is specifically used to perform the method performed by the UE in the embodiment shown in FIG. 4, and the implementation process and the technical principle are similar, and details are not described herein again.
  • the UE provided by the present application is configured to receive, by the receiving module, a first DRS that is sent by the base station on the first resource of the current downlink subframe, where the first DRS includes: the first ePSS, the first PSS, the SIB, and the SSS And the eSBS and the ePBCH, the receiving module is further configured to receive, by the base station, a second DRS sent on a next downlink subframe of the current downlink subframe or a second resource of the current downlink subframe, where the second DRS is different from the first DRS.
  • the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS, and the second resource is different from the first resource
  • the acquiring module is configured to obtain the coverage gain according to the first DRS and the second DRS, so that the base station is currently
  • the first DRS is sent on the first resource of the downlink subframe
  • the second DRS is sent in the next downlink subframe of the current downlink subframe in the time domain, or the second resource in the current downlink subframe is in the frequency domain.
  • the UE obtains the coverage gain according to the first DRS and the second DRS after receiving the first DRS and the second DRS, and performs the coverage gain of the PSS and the SSS repeatedly in only one subframe.
  • the UE provided by the application can enter one Get coverage gain.
  • FIG. 14 is a schematic structural diagram of Embodiment 2 of a base station provided by the present application.
  • the base station 140 provided by the present application includes:
  • a memory 142 configured to store an instruction
  • the processor 143 is respectively connected to the memory 142 and the transceiver 141 for executing instructions to perform the following steps when executing the instructions:
  • the first DRS is sent to the UE on the first resource of the current downlink subframe, where the first DRS includes: the first ePSS, the first PSS, the SIB, the SSS, and the eSSS to the ePBCH; and the next downlink subframe
  • the second DRS is sent to the UE on the second subframe of the current downlink subframe or the second DRS, where the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS.
  • the second resource is different from the first resource.
  • the second DRS includes: a first ePSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a second ePSS, a second PSS, an SSS, an eSSS, SIB and ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the processor 143 is further configured to: determine a first root index of the ePSS; determine a first root index of the PSS Generating a first ePSS according to the first root index of the ePSS; generating a first PSS according to the first root index of the PSS; processing the first ePSS to generate a second ePSS; and processing the first PSS to generate a second PSS.
  • the processor 143 in processing the first ePSS to generate a second ePSS, is configured to:
  • the processor 143 in processing the first PSS to generate a second PSS, is configured to:
  • the processor 143 is further configured to: determine a second root index of the ePSS; determine a second root index of the PSS Generating a second ePSS according to the second root index of the ePSS; generating a second PSS according to the second root index of the PSS.
  • the first DRS further includes a cPBCH; the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or a first PSS of one symbol and a symbol of the first An ePSS, Alternatively, a second ePSS of two symbols; or a second PSS of two symbols.
  • the base station provided by the present application is specifically configured to perform the method performed by the base station in the embodiment shown in FIG. 4, and the implementation process, technical principles, and technical effects are similar, and details are not described herein again.
  • FIG. 15 is a schematic structural diagram of Embodiment 2 of a UE provided by the present application.
  • the UE 150 provided by the present application includes:
  • a memory 152 configured to store an instruction
  • the processor 153 is respectively connected to the memory 152 and the transceiver 151 for executing instructions to perform the following steps when executing the instructions:
  • the base station Receiving, by the base station, the first DRS that is sent by the first resource in the current downlink subframe, where the first DRS includes: a first ePSS, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; and the receiving base station is in the current downlink subframe.
  • a second DRS sent on the next downlink subframe or the second resource of the current downlink subframe, where the second DRS is different from the first DRS, and the second DRS is used by the UE to obtain the coverage gain according to the first DRS and the second DRS.
  • the second resource is different from the first resource; the coverage gain is obtained according to the first DRS and the second DRS.
  • the second DRS includes: a first ePSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a first PSS, an SIB, an SSS, an eSSS, and an ePBCH; or, a second ePSS, a second PSS, an SSS, an eSSS, SIB and ePBCH, the first ePSS is different from the second ePSS, and the first PSS is different from the second PSS.
  • the first DRS further includes a cPBCH
  • the second DRS further includes: a first PSS of two symbols; or a first ePSS of two symbols; or a first PSS of one symbol and a symbol of the first An ePSS, or a second ePSS of two symbols; or a second PSS of two symbols.
  • the UE provided by the present application is specifically used to perform the method performed by the UE in the embodiment shown in FIG. 4, and the implementation process, technical principles, and technical effects are similar, and details are not described herein again.
  • the application further provides a computer readable storage medium comprising computer executed instructions for causing a base station to perform the method performed by a base station in the embodiment of FIG.
  • the application further provides a computer readable storage medium comprising computer executed instructions for causing a UE to perform a method performed by a UE in the embodiment shown in FIG.
  • the aforementioned program can be stored in a computer readable storage medium.
  • the program when executed, performs the steps including the foregoing method embodiments; and the foregoing storage medium includes various media that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本申请提供一种非授权频谱上DRS传输方法及装置。该方法包括:基站在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH,基站在该当前下行子帧的下一下行子帧或者当前下行子帧的第二资源上向UE发送第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,实现了进一步提高覆盖增益。

Description

非授权频谱上DRS传输方法及装置 技术领域
本申请涉及通信技术,尤其涉及一种非授权频谱上发现参考信号(Discovery Reference Signal,DRS)传输方法及装置。
背景技术
随着人工智能、自动化办公的兴起,工厂、港口、仓库等传统作业场景对无线通信的需求也进一步增加。基于保密性、定制性的需求,这些场景不适宜接入传统运营商网络,又由于授权频点(licensed频点)的稀缺,因此基于licensed频点建站成本较高,因此,基于非授权频点(unlicensed频点)独立部署长期演进(Long Term Evolution,LTE)基站成为这些企业网络部署的直接选择。MulteFire联盟(MF Alliance)的成立,也将进一步推进企业基于unlicensed频点进行独立网络部署。unlicensed频点允许不同单位和个人、不同制式的系统可以使用同一个频点。目前unlicensed频点主要由无线保真(Wireless Fidelity,WIFI)系统使用。为了保证unlicensed频点可以被高效且公平的使用,频谱法规规定各网元在发送数据之前,需要执行先检测后发送(Listen-Before-Talk,LBT)或者空闲信道评测(Clear Channel Assessment,CCA),即检测信道空闲后才可以发送。并且,每次抢占信道后,最多只能发送有限时长,比如不能超过一个传输机会(Transmission Opportunity,TXOP)或最大连续占用时长(Max Continuous Occupied Time,MCOT),一个TXOP或MCOT时长可以为10ms,8ms等。频谱法规规定在unlicensed频点上,各无线发射单元功率谱不能超过门限值,例如,在5150~5350MHZ带宽内,在使用发送功率控制(Transmit Power Control,TPC)的场景中,各无线发射单元的最大发射功率不能超过23dBm,最大功率谱密度不能超过10dBm/MHz。MF系统中,基站(eNodeB)作为中心控制器通常会调度多个用户设备(User Equipment,UE)。在上行传输过程中,每个UE可以通过频率资源离散化保证在满足功率谱的前提下,充分利用法规规定的最大功率发射。而在下行传输过程中,基站需要同时调度多个UE,这样导致了下行发送功率需要在多个UE间共享。而法规明确规定了基站和UE所允许发射的最大发射功率是一样的,因此,MF系统中存在上下行功率谱不一致的问题,下行信道覆盖更加受限。因此,需要对该种场景的下行信道进行覆盖增强设计。
现有技术中,LTE标准中定义了DRS。图1为DRS中包括的信号。如图1所示,DRS包括的信号有:物理下行控制信道(Physical Downlink Control Channel,PDCCH)、主同步信号(Primary Synchronization Signal,PSS)、辅同步信号(Secondary Synchronization Signal,SSS)以及物理广播信道(Physical Broadcast Channel,PBCH)。图2为MF系统中DRS包括的信号。如图2所示,MF系统中的DRS增加了增强主同步信号(Enhanced Primary Synchronization Signal,ePSS)和增强辅同步信号(Enhanced Secondary Synchronization Signal,eSSS),相当于有两份主同步信号和两份辅同步信号。基站向用户设备发送DRS。UE对DRS进行识别,识别的时候可以获取两份主同步信号(ePSS/PSS) 和两份辅同步信号(eSSS/SSS),对两份主同步信号和两份辅同步信号分别进行联合处理,可以获取联合处理增益,从而,实现了DRS中PSS和SSS的覆盖增强,理论上有3dB的覆盖增益。同时,MF系统中DRS中定义了增强物理广播信道(Enhanced Physical Broadcast Channel,ePBCH),承载与PBCH相同的信息比特,占用的符号由四个符号(7/8/9/10)增加到六个符号(7/8/9/10/11/4),相当于,在图1中,PBCH是在该子帧内实现了重复4次,而在图2中,定义了ePBCH后,ePBCH在该子帧内实现了接近6次重复,理论上可以获取1.7dB的覆盖增强。
但是,在目前的方法中,通过ePSS和eSSS实现在当前下行子帧内进行PSS和SSS的重复,以及,对PBCH占用符号进行扩展都会受到当前下行子帧资源的限制:在当前DRS占用12个符号的情况下,如果按照协议规定,在中心6个资源块(Resource Block,RB)的带宽上,PSS只能重复一次,SSS也只能重复一次,ePBCH只能扩展到占用6个符号。也就是说,上述方式的覆盖增强受到当前下行子帧中心6个RB资源的严格限制,覆盖增益的提升非常有限。
发明内容
本申请提供一种非授权频谱上DRS传输方法及装置,以进一步提高覆盖增益。
第一方面,本申请提供一种非授权频谱上DRS传输方法,包括:基站在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH;基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上向UE发送第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同,实现了基站在当前下行子帧的第一资源上发送第一DRS之后,时域上,在当前下行子帧的下一下行子帧上发送第二DRS,或者,频域上,在当前下行子帧的第二资源上发送第二DRS,相较于只在一个子帧内进行PSS和SSS的重复获取覆盖增益的方法,本申请提供的非授权频谱上DRS传输方法不会受到当前下行子帧资源的限制,从而,进一步提高了覆盖增益。
在第一方面的一种可能的设计中,第二DRS中包括:第一ePSS、SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
在第一方面的一种可能的设计中,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,方法还包括:基站确定ePSS的第一根索引;基站确定PSS的第一根索引;基站根据ePSS的第一根索引生成第一ePSS;基站根据PSS的第一根索引生成第一PSS;基站对第一ePSS进行处理,生成第二ePSS;基站对第一PSS进行处理,生成第二PSS。
在第一方面的一种可能的设计中,基站对第一ePSS进行处理,生成第二ePSS,包括:
基站根据公式
Figure PCTCN2017072720-appb-000001
对第一ePSS进行处理,生成第二 ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000002
u1为ePSS的第一根索引;或者,基站根据公式
Figure PCTCN2017072720-appb-000003
对第一ePSS进行处理,生成第二ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000004
u1为ePSS的第一根索引。
在第一方面的一种可能的设计中,基站对第一PSS进行处理,生成第二PSS,包括:
基站根据公式
Figure PCTCN2017072720-appb-000005
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000006
u2为PSS的第一根索引;或者,基站根据公式
Figure PCTCN2017072720-appb-000007
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000008
u2为PSS的第一根索引。
在第一方面的一种可能的设计中,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,方法还包括:基站确定ePSS的第二根索引;基站确定PSS的第二根索引;基站根据ePSS的第二根索引生成第二ePSS;基站根据PSS的第二根索引生成第二PSS。
在第一方面的一种可能的设计中,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS,或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
第二方面,本申请提供一种非授权频谱上DRS传输方法,包括:UE接收基站在当前下行子帧的第一资源上发送的第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH;UE接收基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上发送的第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同;UE根据第一DRS和第二DRS获取覆盖增益。
在第二方面的一种可能的设计中,第二DRS中包括:第一ePSS、SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
在第二方面的一种可能的设计中,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS,或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
第三方面,本申请提供一种基站,包括:发送模块,用于在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH;发送模块还用于在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上向UE发送第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同。
在第三方面的一种可能的设计中,第二DRS中包括:第一ePSS、-SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
在第三方面的一种可能的设计中,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,基站还包括:第一确定模块,用于确定ePSS的第一根索引;第一确定模块还用于确定PSS的第一根索引;第一生成模块,用于根据ePSS的第一根索引生成第一ePSS;第一生成模块还用于根据PSS的第一根索引生成第一PSS;处理模块,用于对第一ePSS进行处理,生成第二ePSS;处理模块还用于对第一PSS进行处理,生成第二PSS。
在第三方面的一种可能的设计中,处理模块具体用于:
根据公式
Figure PCTCN2017072720-appb-000009
对第一ePSS进行处理,生成第二ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000010
u1为ePSS的第一根索引;或者,根据公式
Figure PCTCN2017072720-appb-000011
对第一ePSS进行处理,生成第二ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000012
u1为ePSS的第一根索引。
在第三方面的一种可能的设计中,处理模块具体用于:
根据公式
Figure PCTCN2017072720-appb-000013
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000014
u2为PSS的第一根索引;或者,根据公式
Figure PCTCN2017072720-appb-000015
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000016
u2为PSS的第一根索引。
在第三方面的一种可能的设计中,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,基站还包括:第二确定模块,用于确定ePSS的第二根索引;第二确定模块还用于确定PSS的第二根索引;第二生成模块,用于根据ePSS的第二根索引生成第二ePSS;第二生成模块还用于根据PSS的第二根索引生成第二PSS。
在第三方面的一种可能的设计中,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS,或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
第四方面,本申请提供一种UE,包括:接收模块,用于接收基站在当前下行子帧的第一资源上发送的第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH;接收模块还用于接收基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上发送的第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同;获取模块,用于根据第一DRS和第二DRS获取覆盖增益。
在第四方面的一种可能的设计中,第二DRS中包括:第一ePSS、SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
在第四方面的一种可能的设计中,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS,或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
第五方面,本申请提供一种基站,包括:收发器;存储器,用于存储指令;处理器,与存储器和收发器分别相连,用于执行指令,以在执行指令时执行如下步骤:在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH;在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上向UE发送第二DRS;其中,第二DRS与第一DRS不同,第二 DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同。
第六方面,本申请提供一种UE,包括:收发器;存储器,用于存储指令;处理器,与存储器和收发器分别相连,用于执行指令,以在执行指令时执行如下步骤:接收基站在当前下行子帧的第一资源上发送的第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH;接收基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上发送的第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同;根据第一DRS和第二DRS获取覆盖增益。
第七方面,本申请提供一种通信系统,包括:第三方面提供的任一基站和第四方面提供的任一UE。
第八方面,本申请提供一种计算机可读存储介质,包含计算机执行指令,计算机执行指令用于使基站执行第一方面的方法或第一方面的任一种可能的设计中的方法。
第九方面,本申请提供一种计算机可读存储介质,包含计算机执行指令,计算机执行指令用于使UE执行第二方面的方法或第二方面的任一种可能的设计中的方法。
附图说明
图1为DRS中包括的信号;
图2为MF系统中DRS包括的信号;
图3为本申请提供的非授权频谱上DRS传输方法的应用场景的示意图;
图4为本申请提供的非授权频谱上DRS传输方法实施例的流程交互示意图;
图5为本申请提供的第一种第一DRS的示意图;
图6为本申请提供的第一种第二DRS的示意图;
图7A为本申请提供的非授权频谱上DRS传输方法中第二DRS在时域上的发送示意图;
图7B为本申请提供的非授权频谱上DRS传输方法中第二DRS在频域上的发送示意图;
图8为本申请提供的第二种第二DRS的示意图;
图9为本申请提供的第三种第二DRS的示意图;
图10为本申请提供的第二种第一DRS的示意图;
图11为本申请提供的第四种第二DRS的示意图;
图12为本申请提供的基站实施例一的结构示意图;
图13为本申请提供的UE实施例一的结构示意图;
图14为本申请提供的基站实施例二的结构示意图;
图15为本申请提供的UE实施例二的结构示意图。
具体实施方式
图3为本申请提供的非授权频谱上DRS传输方法的应用场景的示意图。如图3所示,本申请提供的DRS传输方法应用于基于unlicensed频点独立部署的LTE基站31与UE 33 交互的场景中。该场景例如可以是企业、工厂、车间及仓库等。当UE 33与基站31之间有障碍物32时,UE 33接收到的基站31的信号强度会减弱,从而,无法实现与基站31之间的正常通信。在这种场景中,需要进行覆盖增强,以提高UE 33和基站31之间的通信的可靠性。本申请提供的DRS传输方法旨在进行DRS信号的增强,以使UE 33可以获取DRS信号的覆盖增益,实现UE 33可靠地进行下行同步以及获取基站31的系统信息。本申请提供的非授权频谱上DRS传输方法,通过基站在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、系统消息块(System Information Block,SIB)、SSS、eSSS以及增强物理广播信道(Enhanced Physical Broadcast Channel,ePBCH),基站在该当前下行子帧的下一下行子帧或者当前下行子帧的第二资源上向UE发送第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,实现了基站在当前下行子帧的第一资源上发送第一DRS之后,时域上,在当前下行子帧的下一下行子帧上发送第二DRS,或者,频域上,在当前下行子帧的第二资源上发送第二DRS,相较于只在一个子帧内进行PSS和SSS的重复获取覆盖增益的方法,本申请提供的非授权频谱上DRS传输方法不会受到当前下行子帧资源的限制,从而,进一步提高了覆盖增益。
图4为本申请提供的非授权频谱上DRS传输方法实施例的流程交互示意图。如图4所示,本申请提供的DRS传输方法包括如下步骤:
S401:基站在当前下行子帧的第一资源上向UE发送第一DRS。
其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH。
具体地,在基于unlicensed频点部署的基站中,基站在执行完CCA之后,抢占到信道,如果确定需要向UE发送DRS,则基站在当前信道时间(Burst)内的当前下行子帧的第一资源上发送第一DRS。
本申请中的当前下行子帧的第一资源是指当前下行子帧的带宽中用于发送第一DRS的RB,示例性地,第一资源可以是6个RB。
在本申请中,SIB可以是MulteFire系统消息块(MF-SIB)。第一DRS中的MF-SIB和ePBCH用于使UE获取基站的系统信息,例如,基站发送的频段。第一DRS中的ePSS、PSS、eSSS及SSS用于使UE完成下行同步。
更具体地,图5为本申请提供的第一种第一DRS的示意图。如图5所示,当前下行子帧中包括14个符号0-13,eSSS位于第2个符号,第一ePSS位于第3个符号,ePBCH位于第4个符号、第7-第11个符号,SSS位于第5个符号,第一PSS位于第6个符号,MF-SIB位于第二个符号-第11个符号。在第一种第一DRS中,当前下行子帧的第12个符号和第13个符号上没有信号。
S402:基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上向UE发送第二DRS。
其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益。
具体地,基站在发送完第一DRS之后,即可以在时域上或者频域上发送第二DRS,实现对第一DRS中的某些信号进行重复,以使UE接收到第一DRS和第二DRS之后,结合第一DRS和第二DRS实现DRS的覆盖增益。
需要说明的是,在本申请提供的非授权频谱上DRS传输方法中,UE有两种:一种为支持覆盖增强的第一UE,另一种为不支持覆盖增强的第二UE。为了使基站发送的第二DRS不影响第二UE的正常通信,需要使第二DRS与第一DRS不相同,且第二DRS可以使第一UE结合第一DRS和第二DRS获取覆盖增益。由于第一UE中预置了识别第二DRS的码本,所以,当第二DRS与第一DRS不同时,第一UE可以在接收到第二DRS之后,结合第一的DRS和第二DRS获取覆盖增益,而第二UE由于没有识别第二DRS的码本,则无法识别第二DRS,从而,也不会造成误操作和误判。
可以通过设置第二DRS中某些信号与第一DRS中的某些信号本身不同或者某些信号的数量不同来实现第二DRS不同于第一DRS。
在本申请中,提供了三种不同于第一DRS的第二DRS。
图6为本申请提供的第一种第二DRS的示意图。如图6所示,第一种第二DRS中包括:第一ePSS、MF-SIB、SSS、eSSS以及ePBCH。结合图5和图6,可以看到第一DRS与第一种第二DRS的区别在于:第一种第二DRS中将第一DRS中的第一PSS换成了第一ePSS,即,相较于图5中的包括一个符号的第一ePSS和一个符号的第一PSS的第一DRS,图6中的第一种第二DRS中包括两个符号的第一ePSS。更具体地,图6所示的第一种第二DRS中,eSSS位于第2个符号,第一ePSS位于第3个符号和第6个符号,ePBCH位于第4个符号、第7个-第11个符号,SSS位于第5个符号,MF-SIB位于第2个-第11个符号。
基站在发送第二DRS时,有以下两种实现方式:
图7A为本申请提供的非授权频谱上DRS传输方法中第二DRS在时域上的发送示意图。示例性地,如图7A所示,基站在当前下行子帧n上发送第一DRS,在burst内的该当前下行子帧n的下一下行子帧n+1,以及当前下行子帧n的下一下行子帧n+1的下一下行子帧n+2上发送第二DRS。本申请中的当前下行子帧的下一下行子帧指的是当前下行子帧的下一个下行子帧。需要说明的是,按照burst的时长以及实际通信的需求,基站可以在当前下行子帧n发送第一DRS,在当前下行子帧的下一下行子帧n+1发送第二DRS;基站也可以在burst内,在当前下行子帧n发送第一DRS,在当前下行子帧n之后的所有连续的下行子帧中均发送第二DRS,以实现进一步的覆盖增益。图7A中示出了基站在当前下行子帧n之后的两个连续的下行子帧n+1与n+2中发送第二DRS。
需要说明的是,在该实现方式中,基站在每次抢占到信道后,需要判断在burst内能否连续发送当前下行子帧n以及当前下行子帧n的下一下行子帧n+1。基站在确定burst能连续发送当前下行子帧n以及当前下行子帧n的下一下行子帧n+1时,才执行S401和S402。
图7B为本申请提供的非授权频谱上DRS传输方法中第二DRS在频域上的发送示意图。如图7B所示,基站在当前下行子帧中的第二资源上发送第二DRS。示例性地,图7B中示出了基站在第二资源f1上以及第二资源fn上均发送第二DRS。本申请中的第二资源为能满足发送第二DRS的、与第一资源f0位置不同的RB。可选的,第二资源可以为6个RB。在该种实现方式中,基站在当前下行子帧n的第一资源上发送第一DRS,在该当前下行子帧n的第二资源上发送第二DRS。需要说明的是,基站可以在一个第二资源上发送第二DRS,也可以在多个第二资源上均发送第二DRS,以实现进一步的覆盖增益。
图8为本申请提供的第二种第二DRS的示意图。如图8所示,第二种DRS包括:第一PSS、MF-SIB、SSS、eSSS以及ePBCH。结合图5和图8,可以看到第一DRS与第二种第二DRS的区别在于:第二种第二DRS中将第一DRS中的第一ePSS换成了第一PSS,即,相较于图5中包括一个符号的第一ePSS和一个符号的第一PSS的第一DRS,图8中的第二种第二DRS中包括两个符号的第一PSS。图8所示的第二种第二DRS中,eSSS位于第2个符号,第一PSS位于第3个符号和第6个符号,ePBCH位于第4个符号、第7个-第11个符号,SSS位于第5个符号,MF-SIB位于第2个-第11个符号。
与第一种第二DRS的发送方式相同,第二种第二DRS也可以有时域和频域上两种发送方式,与图7A和图7B类似,此处不再赘述。
图9为本申请提供的第三种第二DRS的示意图。如图9所示,第三种第二DRS包括:第二ePSS、第二PSS、MF-SIB、SSS、eSSS以及ePBCH。该第二DRS中的第二ePSS与第一ePSS不同,第二PSS与第一PSS不同。结合图5和图9,可以看到第一DRS与第三种第二DRS的区别在于:第三种第二DRS中将第一DRS中的第一PSS换成了第二PSS,将第一DRS中的第一ePSS换成了第二ePSS。更具体地,图9所示的第三种第二DRS中,eSSS位于第2个符号,第二ePSS位于第3个符号,ePBCH位于第4个符号、第7个-第11个符号,SSS位于第5个符号,第二PSS位于第6个符号,MF-SIB位于第2个-第11个符号。
与第一种第二DRS的发送方式相同,第三种第二DRS也可以有时域和频域上两种发送方式,与图7A和图7B类似,此处不再赘述。
基站在生成第二ePSS和第二PSS时,有以下两种实现方式:
第二ePSS和第二PSS的第一种生成方式具体为:基站确定ePSS的第一根索引;基站确定PSS的第一根索引;基站根据ePSS的第一根索引生成第一ePSS;基站根据PSS的第一根索引生成第一PSS;基站对第一ePSS进行处理,生成第二ePSS;基站对第一PSS进行处理,生成第二PSS。需要说明的是,在上述过程中,只要保证确定ePSS的第一根索引、根据ePSS的第一根索引生成第一ePSS以及根据第一ePSS生成第二ePSS之间具有时序关系,以及确定PSS的第一根索引、根据PSS的第一根索引生成第一PSS以及根据第一PSS生成第二PSS之间具有时序关系即可。
基站可以根据MF协议中定义的ePSS根指数表确定ePSS的第一根索引,根据MF协议中定义的PSS根指数表确定PSS的第一根索引。
表1为MF协议中定义的ePSS的根指数表。表2为MF协议中定义的PSS的根指数表。
表1 MF协议中定义的ePSS的根指数表
NID (2) ePSS的根索引u1
0 40
1 44
2 59
表2 MF协议中定义的PSS的根指数表
NID (2) PSS根索引u2
0 25
1 29
2 34
NID (2)表示小区的标识。基站根据表1、表2以及预先配置的小区标识分别确定ePSS的第一根索引和PSS的第一根索引。之后,基站根据公式:
Figure PCTCN2017072720-appb-000017
生成第一ePSS和第一PSS。在该公式中,当u为ePSS的第一根索引u1时,生成的即为第一ePSS du1(n);当u为PSS的第一根索引u2时,生成的即为第一PSS du2(n),即:
Figure PCTCN2017072720-appb-000018
之后,基站对第一ePSS和第一PSS进行处理,具体过程如下:
基站根据公式
Figure PCTCN2017072720-appb-000019
对第一ePSS进行处理,生成第二ePSS。或者,基站根据公式
Figure PCTCN2017072720-appb-000020
对第一ePSS进行处理,生成第二ePSS。其中,du1(n)表示第一ePSS。
同样地,基站根据公式
Figure PCTCN2017072720-appb-000021
对第一PSS进行处理,生成第二PSS。或者,基站根据公式
Figure PCTCN2017072720-appb-000022
对第一PSS进行处理,生成第二PSS。其中,du2(n)表示第一PSS。
根据上述方法生成的第二ePSS与第一ePSS不同,第二PSS与第一PSS不同,从而,实现第二DRS与第一DRS不同。更进一步地,第二ePSS与第一ePSS有优异的互相关特性,且与本身有很好的自相关特性;第二PSS与第一PSS有优异的互相关特性,且与本身有很好的自相关特性,从而,实现更有效地使第二DRS与第一DRS不同。
第二ePSS和第二PSS的第二种生成方式具体为:基站确定ePSS的第二根索引;基站确定PSS的第二根索引;基站根据ePSS的第二根索引生成第二ePSS;基站根据PSS的第二根索引生成第二PSS。需要说明的是,在上述过程中,只要保证确定ePSS的第二根索引与根据ePSS的第二根索引生成第二ePSS之间具有时序关系,以及确定 PSS的第二根索引与根据PSS的第二根索引生成第二PSS之间具有时序关系即可。
在本生成方式中,基站可以根据预先定义的ePSS的根指数表确定ePSS的第二根索引,根据预先定义的PSS的根指数表确定PSS的第二根索引。这里所涉及的预先定义的ePSS的根指数表与MF协议中定义的ePSS的根指数表中的ePSS的根索引的取值不同,这里所涉及的预先定义的PSS的根指数表与MF协议中定义的PSS的根指数表中的PSS的根索引的取值不同。
表3示出了可选的根指数u的取值。
表3可选的根指数u的取值
Figure PCTCN2017072720-appb-000023
在确定该预先定义的ePSS的根指数表与预先定义的PSS的根指数表时,可以从表3中任意取两组值分别作为ePSS的根指数表和PSS的根指数表。
可选的,在本申请中,表4为预先定义的ePSS的根指数表。表5为预先定义的PSS的根指数表。
表4预先定义的ePSS的根指数表
NID (2) ePSS的根索引
0 5
1 10
2 15
表5预先定义的PSS的根指数表
NID (2) PSS的根索引
0 20
1 48
2 53
可选的,在本申请中,表6为预先定义的另一种ePSS的根指数表。表7为预先定义的另一种PSS的根指数表。
表6预先定义的另一种ePSS的根指数表
NID (2) ePSS的根索引
0 20
1 48
2 53
表7预先定义的另一种PSS的根指数表
NID (2) ePSS的根索引
0 5
1 10
2 15
在根据表4与表5或者表6与表7确定了ePSS的第二根索引、PSS的第二根索引后,基站可以根据公式
Figure PCTCN2017072720-appb-000024
生成第二ePSS与第二PSS。在公式中,当u为ePSS的第二根索引时,生成的即为第二ePSS;当u为PSS的第二根索引时,生成的即为第二PSS。
需要说明的是,表4与表5、表6与表7是选自表3里的两组值。表3所列根索引对应的序列与表1和表2中对应序列有良好互相关性能,更有效地使第二DRS与第一DRS不同。
本申请还提供了第二种第一DRS。图10为本申请提供的第二种第一DRS的示意图。如图10所示,该第一DRS还包括:压缩的物理广播信道(compact Physical Broadcast Channel,cPBCH)。具体地,cPBCH位于第12个和第13个符号。基于第一DRS的这种实现方式,第二DRS中还可以有第四种实现方式,该第四种第二DRS中包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS;或者,两个符号的第二ePSS;或者,两个符号的第二PSS。具体地,在第二DRS中还可以包括两个符号的第一PSS的实现方式中,此时,第一PSS位于第12个符号和第13个符号。需要说明的是,在这种实现方式中,在第二DRS还包括其他的信号时,这些信号均位于第12个符号和第13个符号,不再赘述。
与第一种第二DRS的发送方式相同,第四种第二DRS也可以有时域和频域上两种发送方式,与图7A和图7B类似,此处不再赘述。
再基于第二DRS之前的三种实现方式,此时,第四种第二DRS可以有15种实现方式。图11为本申请提供的第四种第二DRS的示意图。如图11所示,其中示出了15种实现方式中的两种实现方式。在图11中的第1种实现方式中,第二DRS包括:第一ePSS、MF-SIB、SSS、eSSS以及ePBCH。更具体地,eSSS位于第2个符号,第一ePSS位于第3个符号、第6个符号、第12个符号以及第13个符号,ePBCH位于第4个符号、第7个-第11个符号,SSS位于第5个符号,MF-SIB位于第2个-第11个符号。在图11中的第2种实现方式中,第二DRS包括:第一PSS、MF-SIB、SSS、eSSS以及ePBCH。更具体地,eSSS位于第2个符号,第一PSS位于第3个符号、第6个符号、第12个符号以及第13个符号,ePBCH位于第4个符号、第7个-第11个符号,SSS位于第5个符号,MF-SIB位于第2个-第11个符号。
需要说明的是,在上述所有的第二DRS的实现方式中,第二DRS中的MF-SIB与第一DRS中的MF-SIB相同。第二DRS中的ePBCH与第一DRS中的ePBCH相同。这样,UE在接收到第一DRS和第二DRS之后才能对ePBCH和MF-SIB分别进行合并处理,获取覆盖增益。
S403:UE接收基站在当前下行子帧的第一资源上发送的第一DRS。
其中,第一DRS中包括:第一ePSS、第一PSS、MF-SIB、SSS、eSSS以及ePBCH。
具体地,S403-S405中所涉及的UE为支持覆盖增益的第一UE。该UE的本地中预先设置了可以识别第二DRS的码本,即该UE中预先设置了本地序列搜索相关峰以识别第 二DRS。
需要说明的是,在第四种第二DRS的15种实现方式中,在第3个符号、第6个符号、第12个符号以及第13个符号上的信号相同时,此时,UE本地需要的识别码本越少,可以节省UE的资源和功耗。
S404:UE接收基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上发送的第二DRS。
其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同。
具体地,第一资源与第二资源的具体含义如S401和S402中所示,此处不再赘述。
S405:UE根据第一DRS和第二DRS获取覆盖增益。
具体地,以下以第二DRS为上述第三种第二DRS为例,说明UE是如何根据第一DRS和第二DRS获取覆盖增益的。
针对第二DRS的两种发送方式,UE有以下两种方式获取覆盖增益:
当基站在当前下行子帧的第一资源上发送第一DRS,在当前下行子帧的下一下行子帧上发送第二DRS时,UE需要对接收到的每个下行子帧分别做第一ePSS、第一PSS和第二ePSS、第二PPS的滑动相关检测,具体过程如下所示:
步骤1:如果第一ePSS和第一PPS相关峰值大于阈值门限(Threshold),则当前下行子帧对应的为第一DRS。
步骤2:如果第二ePSS和第二PPS相关峰值大于阈值门限,则当前下行子帧对应的为第二DRS。
步骤3:如果当前下行子帧的第一ePSS、第一PSS和第二ePSS、第二PPS都不大于阈值门限,记录当前下行子帧的第一ePSS、第一PSS滑动相关峰值Thr0_0,第二ePSS、第二PPS相关峰值Thr1_0,需要继续对和当前下行子帧连续的下一个下行子帧继续做滑动相关,记录第一ePSS、第一PSS相关峰值Thr0_1和第二ePSS、第二PPS相关峰值Thr1_1。
步骤4:计算Thr0_0+Thr1_1的和,如果和大于阈值门限(联合判决门限Union_Threshold),则当前下行子帧为第二DRS,上一个下行子帧为第一DRS。
步骤5:对第一DRS和第二DRS对应的ePBCH进行合并处理,获取合并增益。同理,MF-SIB也可以获取合并增益。
当基站在当前下行子帧的第一资源上发送第一DRS,在当前下行子帧的第二资源上发送第二DRS时,UE需要对接收到的每个子帧的第一资源位置和第二资源位置分别做第一ePSS、第一PSS和第二ePSS、第二PPS的滑动相关检测,具体过程如下所示:
步骤1:如果第一资源位置第一ePSS和第一PPS相关峰值大于阈值门限(Threshold)则该资源位置对应的为第一DRS。
步骤2:如果第二资源位置第二ePSS和第二PPS相关峰值大于阈值门限,则该资源位置对应的为第二DRS。
步骤3:如果当前下行子帧的第一资源位置、第二资源位置滑动相关峰值都不大于阈值门限,记录当前下行子帧第一资源位置第一ePSS、第一PSS滑动相关峰值Thr0,第二资源位置第二ePSS、第二PPS的相关峰值Thr1。
步骤4:计算Thr0+Thr1并判断是否大于大于阈值门限(联合判决门限 Union_Threshold),如果大于门限,则第一资源位置为第一DRS,第二资源位置为第二DRS。
步骤5:对第一DRS和第二DRS对应的ePBCH进行合并处理,获取合并增益。同理,MF-SIB也可以获取合并增益。
本申请提供的非授权频谱上DRS传输方法,通过基站在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH,基站在该当前下行子帧的下一下行子帧或者当前下行子帧的第二资源上向UE发送第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,实现了基站在当前下行子帧的第一资源上发送第一DRS之后,时域上,在当前下行子帧的下一下行子帧上发送第二DRS,或者,频域上,在当前下行子帧的第二资源上发送第二DRS,相较于只在一个子帧内进行PSS和SSS的重复获取覆盖增益的方法,本申请提供的非授权频谱上DRS传输方法不会受到当前下行子帧资源的限制,从而,进一步提高了覆盖增益。
图12为本申请提供的基站实施例一的结构示意图。如图12所示,本申请提供的基站120包括如下模块:
发送模块121,用于在当前下行子帧的第一资源上向UE发送第一DRS。
其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH。
发送模块121还用于在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上向UE发送第二DRS。
其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同。
可选的,第二DRS中包括:第一ePSS、SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
可选的,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,基站还包括:第一确定模块,用于确定ePSS的第一根索引;第一确定模块还用于确定PSS的第一根索引;第一生成模块,用于根据ePSS的第一根索引生成第一ePSS;第一生成模块还用于根据PSS的第一根索引生成第一PSS;处理模块,用于对第一ePSS进行处理,生成第二ePSS;处理模块还用于对第一PSS进行处理,生成第二PSS。处理模块具体用于:
根据公式
Figure PCTCN2017072720-appb-000025
对第一ePSS进行处理,生成第二ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000026
u1为ePSS的第一根索引;或者,根据公式
Figure PCTCN2017072720-appb-000027
对第一ePSS进行处理,生成 第二ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000028
u1为ePSS的第一根索引。
处理模块具体用于:
根据公式
Figure PCTCN2017072720-appb-000029
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000030
u2为PSS的第一根索引;或者,根据公式
Figure PCTCN2017072720-appb-000031
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000032
u2为PSS的第一根索引。
可选的,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,基站还包括:第二确定模块,用于确定ePSS的第二根索引;第二确定模块还用于确定PSS的第二根索引;第二生成模块,用于根据ePSS的第二根索引生成第二ePSS;第二生成模块还用于根据PSS的第二根索引生成第二PSS。
可选的,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS,或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
本申请提供的基站具体用于执行图4所示实施例中基站执行的方法,其实现过程和技术原理类似,此处不再赘述。
本申请提供的基站,通过设置发送模块,用于在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH,发送模块还用于在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上向UE发送第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同,实现了基站在当前下行子帧的第一资源上发送第一DRS之后,时域上,在当前下行子帧的下一下行子帧上发送第二DRS,或者,频域上,在当前下行子帧的第二资源上发送第二DRS,相较于只在一个子帧内进行PSS和SSS的重复获取覆盖增益的方法,本申请提供的基站在非授权频谱上发送DRS时,不会受到当前下行子帧资源的限制,从而,进一步提高了覆盖增益。
图13为本申请提供的UE实施例一的结构示意图。如图13所示,本申请提供的UE 130 包括如下模块:
接收模块131,用于接收基站在当前下行子帧的第一资源上发送的第一DRS。
其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH。
接收模块131还用于接收基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上发送的第二DRS。
其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同。
获取模块132,用于根据第一DRS和第二DRS获取覆盖增益。
可选的,第二DRS中包括:第一ePSS、SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
可选的,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS,或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
本申请提供的UE具体用于执行图4所示实施例中UE执行的方法,其实现过程和技术原理类似,此处不再赘述。
本申请提供的UE,通过设置接收模块,用于接收基站在当前下行子帧的第一资源上发送的第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH,接收模块还用于接收基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上发送的第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同,获取模块,用于根据第一DRS和第二DRS获取覆盖增益,实现了基站在当前下行子帧的第一资源上发送第一DRS之后,时域上,在当前下行子帧的下一下行子帧上发送第二DRS,或者,频域上,在当前下行子帧的第二资源上发送第二DRS,UE在接收到第一DRS和第二DRS后,根据第一DRS和第二DRS获取覆盖增益,相较于只在一个子帧内进行PSS和SSS的重复获取覆盖增益的方法,本申请提供的UE可以进一步获取覆盖增益。
图14为本申请提供的基站实施例二的结构示意图。如图14所示,本申请提供的基站140包括:
收发器141;
存储器142,用于存储指令;
处理器143,与存储器142和收发器141分别相连,用于执行指令,以在执行指令时执行如下步骤:
在当前下行子帧的第一资源上向UE发送第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以道ePBCH;在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上向UE发送第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同。
可选的,第二DRS中包括:第一ePSS、SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、 SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
可选的,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,处理器143还用于:确定ePSS的第一根索引;确定PSS的第一根索引;根据ePSS的第一根索引生成第一ePSS;根据PSS的第一根索引生成第一PSS;对第一ePSS进行处理,生成第二ePSS;对第一PSS进行处理,生成第二PSS。
可选的,在对第一ePSS进行处理,生成第二ePSS的方面,处理器143用于:
根据公式
Figure PCTCN2017072720-appb-000033
对第一ePSS进行处理,生成第二ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000034
u1为ePSS的第一根索引;或者,根据公式
Figure PCTCN2017072720-appb-000035
对第一ePSS进行处理,生成第二ePSS,其中,du1(n)为第一ePSS,
Figure PCTCN2017072720-appb-000036
u1为ePSS的第一根索引。
可选的,在对第一PSS进行处理,生成第二PSS的方面,处理器143用于:
根据公式
Figure PCTCN2017072720-appb-000037
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000038
u2为PSS的第一根索引;或者,根据公式
Figure PCTCN2017072720-appb-000039
对第一PSS进行处理,生成第二PSS,其中,du2(n)为第一PSS,
Figure PCTCN2017072720-appb-000040
u2为PSS的第一根索引。
可选的,当第二DRS中包括:第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH时,处理器143还用于:确定ePSS的第二根索引;确定PSS的第二根索引;根据ePSS的第二根索引生成第二ePSS;根据PSS的第二根索引生成第二PSS。
可选的,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS, 或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
本申请提供的基站具体用于执行图4所示实施例中基站执行的方法,其实现过程、技术原理以及技术效果类似,此处不再赘述。
图15为本申请提供的UE实施例二的结构示意图。如图15所示,本申请提供的UE 150包括:
收发器151;
存储器152,用于存储指令;
处理器153,与存储器152和收发器151分别相连,用于执行指令,以在执行指令时执行如下步骤:
接收基站在当前下行子帧的第一资源上发送的第一DRS,其中,第一DRS中包括:第一ePSS、第一PSS、SIB、SSS、eSSS以及ePBCH;接收基站在当前下行子帧的下一下行子帧上或者当前下行子帧的第二资源上发送的第二DRS,其中,第二DRS与第一DRS不同,第二DRS用于UE根据第一DRS和第二DRS获取覆盖增益,第二资源与第一资源不同;根据第一DRS和第二DRS获取覆盖增益。
可选的,第二DRS中包括:第一ePSS、SIB、SSS、eSSS以及ePBCH;或者,第一PSS、SIB、SSS、eSSS以及ePBCH;或者,第二ePSS、第二PSS、SSS、eSSS、SIB以及ePBCH,第一ePSS与第二ePSS不同,第一PSS与第二PSS不同。
可选的,第一DRS中还包括cPBCH;第二DRS中还包括:两个符号的第一PSS;或者,两个符号的第一ePSS;或者,一个符号的第一PSS和一个符号的第一ePSS,或者,两个符号的第二ePSS;或者,两个符号的第二PSS。
本申请提供的UE具体用于执行图4所示实施例中UE执行的方法,其实现过程、技术原理以及技术效果类似,此处不再赘述。
本申请还提供一种计算机可读存储介质,包含计算机执行指令,计算机执行指令用于使基站执行图4所示实施例中基站执行的方法。
本申请还提供一种计算机可读存储介质,包含计算机执行指令,计算机执行指令用于使UE执行图4所示实施例中UE执行的方法。
本领域普通技术人员可以理解:实现上述各方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成。前述的程序可以存储于一计算机可读取存储介质中。该程序在执行时,执行包括上述各方法实施例的步骤;而前述的存储介质包括:ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。

Claims (20)

  1. 一种非授权频谱上发现参考信号DRS传输方法,其特征在于,包括:
    基站在当前下行子帧的第一资源上向用户设备UE发送第一DRS;其中,所述第一DRS中包括:第一增强主同步信号ePSS、第一主同步信号PSS、系统消息块SIB、辅同步信号SSS、增强辅同步信号eSSS以及增强物理广播信道ePBCH;
    所述基站在所述当前下行子帧的下一下行子帧上或者所述当前下行子帧的第二资源上向所述UE发送第二DRS;其中,所述第二DRS与所述第一DRS不同,所述第二DRS用于所述UE根据所述第一DRS和所述第二DRS获取覆盖增益,所述第二资源与所述第一资源不同。
  2. 根据权利要求1所述的方法,其特征在于,所述第二DRS中包括:
    所述第一ePSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    所述第一PSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH,所述第一ePSS与所述第二ePSS不同,所述第一PSS与所述第二PSS不同。
  3. 根据权利要求2所述的方法,其特征在于,当所述第二DRS中包括:第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH时,所述方法还包括:
    所述基站确定ePSS的第一根索引;
    所述基站确定PSS的第一根索引;
    所述基站根据所述ePSS的第一根索引生成所述第一ePSS;
    所述基站根据所述PSS的第一根索引生成所述第一PSS;
    所述基站对所述第一ePSS进行处理,生成所述第二ePSS;
    所述基站对所述第一PSS进行处理,生成所述第二PSS。
  4. 根据权利要求3所述的方法,其特征在于,所述基站对所述第一ePSS进行处理,生成所述第二ePSS,包括:
    所述基站根据公式
    Figure PCTCN2017072720-appb-100001
    对所述第一ePSS进行处理,生成所述第二ePSS,其中,du1(n)为所述第一ePSS,
    Figure PCTCN2017072720-appb-100002
    u1为所述ePSS的第一根索引;或者,
    所述基站根据公式
    Figure PCTCN2017072720-appb-100003
    对所述第一ePSS进行处理,生成所述第二ePSS,其中,du1(n)为所述第一ePSS,
    Figure PCTCN2017072720-appb-100004
    u1为所述ePSS的第一根索引。
  5. 根据权利要求3或4所述的方法,其特征在于,所述基站对所述第一PSS进行处理,生成所述第二PSS,包括:
    所述基站根据公式
    Figure PCTCN2017072720-appb-100005
    对所述第一PSS进行处理,生成所述第二PSS,其中,du2(n)为所述第一PSS,
    Figure PCTCN2017072720-appb-100006
    u2为所述PSS的第一根索引;或者,
    所述基站根据公式
    Figure PCTCN2017072720-appb-100007
    对所述第一PSS进行处理,生成所述第二PSS,其中,du2(n)为所述第一PSS,
    Figure PCTCN2017072720-appb-100008
    u2为所述PSS的第一根索引。
  6. 根据权利要求2所述的方法,其特征在于,当所述第二DRS中包括:第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH时,所述方法还包括:
    所述基站确定ePSS的第二根索引;
    所述基站确定PSS的第二根索引;
    所述基站根据所述ePSS的第二根索引生成所述第二ePSS;
    所述基站根据所述PSS的第二根索引生成所述第二PSS。
  7. 根据权利要求2所述的方法,其特征在于,所述第一DRS中还包括:压缩的物理广播信道cPBCH;
    所述第二DRS中还包括:
    两个符号的所述第一PSS;或者,
    两个符号的所述第一ePSS;或者,
    一个符号的所述第一PSS和一个符号的所述第一ePSS,或者,
    两个符号的第二ePSS;或者,
    两个符号的第二PSS。
  8. 一种非授权频谱上发现参考信号DRS传输方法,其特征在于,包括:
    用户设备UE接收基站在当前下行子帧的第一资源上发送的第一DRS;其中,所述第一DRS中包括:第一增强主同步信号ePSS、第一主同步信号PSS、系统消息块SIB、辅同步信号SSS、增强辅同步信号eSSS以及增强物理广播信道ePBCH;
    所述UE接收所述基站在所述当前下行子帧的下一下行子帧上或者所述当前下行子帧的第二资源上发送的第二DRS;其中,所述第二DRS与所述第一DRS不同,所述第二DRS用于所述UE根据所述第一DRS和所述第二DRS获取覆盖增益,所述第二资源与所述第一资源不同。
  9. 根据权利要求8所述的方法,其特征在于,所述第二DRS中包括:
    所述第一ePSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    所述第一PSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH,所述第一ePSS与所述第二ePSS不同,所述第一PSS与所述第二PSS不同。
  10. 根据权利要求9所述的方法,其特征在于,所述第一DRS中还包括:压缩的物理广播信道cPBCH;
    所述第二DRS中还包括:
    两个符号的所述第一PSS;或者,
    两个符号的所述第一ePSS;或者,
    一个符号的所述第一PSS和一个符号的所述第一ePSS,或者,
    两个符号的第二ePSS;或者,
    两个符号的第二PSS。
  11. 一种基站,其特征在于,包括:
    发送模块,用于在当前下行子帧的第一资源上向用户设备UE发送第一DRS;其中,所述第一DRS中包括:第一增强主同步信号ePSS、第一主同步信号PSS、系统消息块SIB、辅同步信号SSS、增强辅同步信号eSSS以及增强物理广播信道ePBCH;
    所述发送模块还用于在所述当前下行子帧的下一下行子帧上或者所述当前下行子帧的第二资源上向所述UE发送第二DRS;其中,所述第二DRS与所述第一DRS不同,所述第二DRS用于所述UE根据所述第一DRS和所述第二DRS获取覆盖增益,所述第二资源与所述第一资源不同。
  12. 根据权利要求11所述的基站,其特征在于,所述第二DRS中包括:
    所述第一ePSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    所述第一PSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH,所述第一ePSS与所述第二ePSS不同,所述第一PSS与所述第二PSS不同。
  13. 根据权利要求12所述的基站,其特征在于,当所述第二DRS中包括:第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH时,所述基站还包括:
    第一确定模块,用于确定ePSS的第一根索引;
    所述第一确定模块还用于确定PSS的第一根索引;
    第一生成模块,用于根据所述ePSS的第一根索引生成所述第一ePSS;
    所述第一生成模块还用于根据所述PSS的第一根索引生成所述第一PSS;
    处理模块,用于对所述第一ePSS进行处理,生成所述第二ePSS;
    所述处理模块还用于对所述第一PSS进行处理,生成所述第二PSS。
  14. 根据权利要求13所述的基站,其特征在于,所述处理模块具体用于:
    根据公式
    Figure PCTCN2017072720-appb-100009
    对所述第一ePSS进行处理,生成所述 第二ePSS,其中,du1(n)为所述第一ePSS,
    Figure PCTCN2017072720-appb-100010
    u1为所述ePSS的第一根索引;或者,
    根据公式
    Figure PCTCN2017072720-appb-100011
    对所述第一ePSS进行处理,生成所述第二ePSS,其中,du1(n)为所述第一ePSS,
    Figure PCTCN2017072720-appb-100012
    u1为所述ePSS的第一根索引。
  15. 根据权利要求13或14所述的基站,其特征在于,所述处理模块具体用于:
    根据公式
    Figure PCTCN2017072720-appb-100013
    对所述第一PSS进行处理,生成所述第二PSS,其中,du2(n)为所述第一PSS,
    Figure PCTCN2017072720-appb-100014
    u2为所述PSS的第一根索引;或者,
    根据公式
    Figure PCTCN2017072720-appb-100015
    对所述第一PSS进行处理,生成所述第二PSS,其中,du2(n)为所述第一PSS,
    Figure PCTCN2017072720-appb-100016
    u2为所述PSS的第一根索引。
  16. 根据权利要求12所述的基站,其特征在于,当所述第二DRS中包括:第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH时,所述基站还包括:
    第二确定模块,用于确定ePSS的第二根索引;
    所述第二确定模块还用于确定PSS的第二根索引;
    第二生成模块,用于根据所述ePSS的第二根索引生成所述第二ePSS;
    所述第二生成模块还用于根据所述PSS的第二根索引生成所述第二PSS。
  17. 根据权利要求12所述的基站,其特征在于,所述第一DRS中还包括:压缩的物理广播信道cPBCH;
    所述第二DRS中还包括:
    两个符号的所述第一PSS;或者,
    两个符号的所述第一ePSS;或者,
    一个符号的所述第一PSS和一个符号的所述第一ePSS,或者,
    两个符号的第二ePSS;或者,
    两个符号的第二PSS。
  18. 一种用户设备UE,其特征在于,包括:
    接收模块,用于接收基站在当前下行子帧的第一资源上发送的第一DRS;其中,所述第一DRS中包括:第一增强主同步信号ePSS、第一主同步信号PSS、系统消息块SIB、辅同步信号SSS、增强辅同步信号eSSS以及增强物理广播信道ePBCH;
    所述接收模块还用于接收所述基站在所述当前下行子帧的下一下行子帧上或者所述当前下行子帧的第二资源上发送的第二DRS;其中,所述第二DRS与所述第一DRS不同,所述第二DRS用于所述UE根据所述第一DRS和所述第二DRS获取覆盖增益,所述第二资源与所述第一资源不同。
  19. 根据权利要求18所述的UE,其特征在于,所述第二DRS中包括:
    所述第一ePSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    所述第一PSS、所述SIB、所述SSS、所述eSSS以及所述ePBCH;或者,
    第二ePSS、第二PSS、所述SSS、所述eSSS、所述SIB以及所述ePBCH,所述第一ePSS与所述第二ePSS不同,所述第一PSS与所述第二PSS不同。
  20. 根据权利要求19所述的UE,其特征在于,所述第一DRS中还包括:压缩的物理广播信道cPBCH;
    所述第二DRS中还包括:
    两个符号的所述第一PSS;或者,
    两个符号的所述第一ePSS;或者,
    一个符号的所述第一PSS和一个符号的所述第一ePSS,或者,
    两个符号的第二ePSS;或者,
    两个符号的第二PSS。
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