WO2020228583A1 - 一种基于窄带物联网的同步信号传输方法及装置 - Google Patents

一种基于窄带物联网的同步信号传输方法及装置 Download PDF

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Publication number
WO2020228583A1
WO2020228583A1 PCT/CN2020/088975 CN2020088975W WO2020228583A1 WO 2020228583 A1 WO2020228583 A1 WO 2020228583A1 CN 2020088975 W CN2020088975 W CN 2020088975W WO 2020228583 A1 WO2020228583 A1 WO 2020228583A1
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synchronization signal
npss
nsss
sequence
domain resource
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English (en)
French (fr)
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吴更石
李军
铁晓磊
金哲
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the field of communication technology, and in particular to a synchronization signal transmission method and device based on narrowband Internet of Things.
  • the Internet of Things is the "Internet of Things". It expands the user end of the Internet to any item and item for information exchange and communication. Such a communication method may also be referred to as Machine Type Communications (MTC), and the communication node may be referred to as an MTC terminal.
  • MTC Machine Type Communications
  • Typical IoT applications include smart grids, smart agriculture, smart transportation, smart homes, and environmental monitoring. Since the Internet of Things needs to be applied in a variety of scenarios, such as from outdoor to indoor, from above ground to underground, many special requirements are put forward for the design of Internet of Things. It includes narrowband Internet of Things (NarrowBand-Internet of Things, NB-IoT) technology. The system bandwidth of NB-IoT technology is 180kHz, which can reuse the spectrum of the Long Term Evolution (LTE) network and reduce the distance from neighboring LTE. Mutual interference of channels.
  • LTE Long Term Evolution
  • the coverage requirements for the synchronization signal in the NB-IoT network are relatively low. high.
  • the coverage requirements for the synchronization signal in the NB-IoT network are relatively low. high.
  • downlink interference such as interference caused by other communication systems or interference caused by neighboring cells
  • it takes a long time to detect the narrowband synchronization signal which results in the terminal being unable to access the network or the delay in accessing the network, which in turn affects the power consumption of the terminal.
  • This application provides a synchronization signal transmission method and device based on the narrowband Internet of Things to improve the success rate of the terminal accessing the NB-IoT network, reduce the time delay of the terminal accessing the NB-IoT network, and then optimize the power consumption of the terminal.
  • this application provides a synchronization signal transmission method based on NB-IoT, which is applied to a communication device in an NB-IoT system, and the communication device may be a terminal.
  • the method includes: a communication device determines a first frequency domain resource and a second frequency domain resource, the first frequency domain resource is used for transmission of a first synchronization signal, and the second frequency domain resource is used for transmission of a second synchronization signal.
  • PRB physical resource block
  • the above-mentioned one PRB is composed of 12 consecutive subcarriers (ie, subcarrier 0 to subcarrier 11), and the center frequency of one PRB is the frequency point between subcarrier 5 and subcarrier 6.
  • the communication device can blindly search for the synchronization signal from the first frequency domain resource and the second frequency domain resource, thereby improving the coverage of the synchronization signal and increasing The probability of the communication device receiving the synchronization signal, thereby increasing the success rate of the communication device accessing the NB-IoT network, reducing the time delay of the communication device accessing the NB-IoT network, and optimizing the power consumption of the communication device.
  • the first synchronization signal includes the first narrowband primary synchronization signal NPSS and/or the first narrowband secondary synchronization signal NSSS;
  • the second synchronization signal includes the first NPSS and/or the first NSSS ;
  • S(l) is the covering code sequence
  • l is the symbol index in the time domain
  • l 3,4,5,...,13.
  • the first NSSS sequence d(n) satisfies:
  • the network device may arrange the same synchronization signal on the first frequency domain resource and the second frequency domain resource, such as the first NPSS and/or the first NSSS.
  • the first NPSS may be referred to as legacy NPSS (legacy NPSS).
  • NPSS legacy NPSS
  • NPSS that is, the NPSS specified by the existing network protocol
  • the first NSSS can also become the traditional NSSS (legacy NSSS), that is, the NSSS specified by the existing network protocol.
  • the second synchronization signal may be completely or partially the same as the first synchronization signal. In this way, the complexity of detecting the synchronization sequence by the communication device is reduced as much as possible.
  • the first synchronization signal includes the first NPSS and/or the first NSSS; the second synchronization signal includes the second NPSS and/or the second NSSS, the first NPSS and the second NPSS Different, the first NSSS is different from the second NSSS.
  • the first synchronization signal and the second synchronization signal may be completely different, so as to avoid interference caused by the detection of the synchronization signal by the existing communication device in the existing network.
  • the second NPSS sequence d′ l (n) satisfies:
  • S(l) is the cover code sequence in the first NPSS sequence d l (n)
  • S'(l) is the cover code sequence in the second NPSS sequence d' l (n)
  • l is the cover code sequence in the time domain
  • Symbol index, l 3,4,5,...,13
  • a new second NPSS sequence design is provided to prevent existing communication devices in the existing network from detecting synchronization signals on the second frequency resource, and continue to detect narrowband physical broadcast channels (narrowband physical broadcast channels). , NPBCH). Since there is no NPBCH on the second frequency domain resource, if the existing communication device in the existing network detects NPBCH on the second frequency domain resource, it will increase power consumption. Then, designing a new second NPSS sequence can avoid The occurrence of this situation further reduces the interference caused to the existing communication devices in the existing network.
  • the second NSSS sequence d′(n) satisfies:
  • a new second NSSS sequence design is provided to reduce interference caused to existing communication devices in the existing network.
  • the second frequency domain resource includes at least two PRBs, and any two PRBs of the at least two PRBs have different center frequencies.
  • the present application provides a synchronization signal transmission method based on NB-IoT, which is applied to a communication device in an NB-IoT system, and the communication device may be a network device.
  • the method includes: a communication device determines a first frequency domain resource and a second frequency domain resource, the first frequency domain resource is used for transmission of a first synchronization signal, and the second frequency domain resource is used for transmission of a second synchronization signal.
  • the first synchronization signal includes the first narrowband primary synchronization signal NPSS and/or the first narrowband secondary synchronization signal NSSS;
  • the second synchronization signal includes the first NPSS and/or the first NSSS ;
  • the first NPSS sequence d l (n) satisfies:
  • S(l) is the covering code sequence
  • l is the symbol index in the time domain
  • l 3,4,5,...,13.
  • the first NSSS sequence d(n) satisfies:
  • the first synchronization signal includes the first NPSS and/or the first NSSS; the second synchronization signal includes the second NPSS and/or the second NSSS, the first NPSS and the second NPSS Different, the first NSSS is different from the second NSSS.
  • the second NPSS sequence d′(n) satisfies:
  • S(l) is the cover code sequence in the first NPSS sequence d l (n)
  • S'(l) is the cover code sequence in the second NPSS sequence d' l (n)
  • l is the cover code sequence in the time domain
  • Symbol index, l 3,4,5,...,13
  • the second NSSS sequence d′(n) satisfies:
  • the second frequency domain resource includes at least two PRBs, and any two PRBs of the at least two PRBs have different center frequencies.
  • the method before the communication device sends the second synchronization signal on the second frequency domain resource, the method further includes: the network side device transmits the second NPSS and/or the second synchronization signal in the second synchronization signal.
  • the first NPSS and/or the first NPSS are mapped to symbols 3 to 13 of the first subframe of the radio frame, where the first A subframe is a radio frame except the subframe used to transmit the first synchronization signal, the subframe used to transmit the second NSSS and/or the second NSSS in the second synchronization signal, and the subframe used to transmit the narrowband broadcast channel And subframes other than the subframe used to transmit the system information block 1SIB1.
  • the method before the communication device sends the second synchronization signal on the second frequency domain resource, the method further includes: the network side device transmits the second NSSS and/or the second synchronization signal in the second synchronization signal. Or after the second NSSS is mapped to subcarriers 0 to 10 of at least one PRB, the first NSSS and/or the first NSSS are mapped to symbols 3 to 13 of the second subframe of the radio frame, where The second subframe is the radio frame except the subframe used to transmit the first synchronization signal, the first subframe used to transmit the second NPSS and/or the second NPSS in the second synchronization signal, and the first subframe used to transmit the narrowband broadcast channel. Subframes and subframes other than the subframe used to transmit the system information block 1SIB1.
  • the present application provides a communication device, which may be a synchronization signal transmission device or a chip or a system on a chip in the synchronization signal transmission device, and may also be a synchronization signal transmission device for implementing the first aspect or the first aspect.
  • the communication device can implement the functions performed by the terminal in the foregoing aspects or in each possible implementation manner, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • the first synchronization signal includes the first narrowband primary synchronization signal NPSS and/or the first narrowband secondary synchronization signal NSSS; the second synchronization signal includes the first NPSS and/or the first NSSS ;among them,
  • the first NPSS sequence d l (n) satisfies:
  • S(l) is the covering code sequence
  • l is the symbol index in the time domain
  • l 3,4,5,...,13.
  • the first NSSS sequence d(n) satisfies:
  • the first synchronization signal includes the first NPSS and/or the first NSSS; the second synchronization signal includes the second NPSS and/or the second NSSS, the first NPSS and the second NPSS Different, the first NSSS is different from the second NSSS.
  • the second NPSS sequence d′ l (n) satisfies:
  • S(l) is the cover code sequence in the first NPSS sequence d l (n)
  • S'(l) is the cover code sequence in the second NPSS sequence d' l (n)
  • l is the cover code sequence in the time domain
  • Symbol index, l 3,4,5,...,13
  • the second NSSS sequence d′(n) satisfies:
  • the second frequency domain resource includes at least two PRBs, and any two PRBs of the at least two PRBs have different center frequencies.
  • the communication module mentioned in the above third aspect may be a transceiver interface, a transceiver circuit or a transceiver, etc.; the processing module may be one or more processors.
  • the present application provides a communication device.
  • the communication device may be a synchronization signal transmission device or a chip or a system on a chip in a synchronization signal transmission device, and may also be a synchronization signal transmission device for implementing the second aspect or the second aspect.
  • the communication device can implement the functions performed by the network device in the foregoing aspects or various possible implementations, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • the first synchronization signal includes the first narrowband primary synchronization signal NPSS and/or the first narrowband secondary synchronization signal NSSS;
  • the second synchronization signal includes the first NPSS and/or the first NSSS ;
  • the first NPSS sequence d l (n) satisfies:
  • S(l) is the covering code sequence
  • l is the symbol index in the time domain
  • l 3,4,5,...,13.
  • the first NSSS sequence d(n) satisfies:
  • the first synchronization signal includes the first NPSS and/or the first NSSS; the second synchronization signal includes the second NPSS and/or the second NSSS, the first NPSS and the second NPSS Different, the first NSSS is different from the second NSSS.
  • the second NPSS sequence d′(n) satisfies:
  • S(l) is the cover code sequence in the first NPSS sequence d l (n)
  • S'(l) is the cover code sequence in the second NPSS sequence d' l (n)
  • l is the cover code sequence in the time domain
  • Symbol index, l 3,4,5,...,13
  • the second NSSS sequence d′(n) satisfies:
  • the second frequency domain resource includes at least two PRBs, and any two PRBs of the at least two PRBs have different center frequencies.
  • the communication module mentioned in the foregoing fourth aspect may be a transceiver interface, a transceiver circuit or a transceiver, etc.; the processing module may be one or more processors.
  • the present application provides a communication device, including a processor, which is configured to be coupled with a memory, read and execute instructions in the memory, so as to implement a synchronization signal based on the narrowband Internet of Things as in any one of the first aspect above Transmission method.
  • the aforementioned communication device further includes a memory.
  • the present application provides a communication device, including a processor, which is configured to be coupled with a memory to read and execute instructions in the memory to implement the synchronization signal based on the narrowband Internet of Things as in any one of the second aspect above Transmission method.
  • the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores instructions. When the instructions run on a computer, they are used to execute the narrowband Internet of Things based on any one of the first and second aspects above.
  • the synchronization signal transmission method When the instructions run on a computer, they are used to execute the narrowband Internet of Things based on any one of the first and second aspects above.
  • the synchronization signal transmission method When the instructions run on a computer, they are used to execute the narrowband Internet of Things based on any one of the first and second aspects above.
  • this application provides a computer program or computer program product.
  • the computer program or computer program product When the computer program or computer program product is executed on a computer, the computer realizes the NB-IoT-based network of any one of the first and second aspects. Synchronization signal transmission method.
  • this application provides a communication system, including a terminal and a network device; wherein the terminal is used to execute any one of the above-mentioned first aspect of the synchronization signal transmission method based on the narrowband Internet of Things; the network device is used to execute the above The synchronization signal transmission method based on the narrowband Internet of Things in any one of the second aspect.
  • the communication system may be an NB-IoT system.
  • Figure 1 is a schematic diagram of NB-IoT carrier independent mode deployment in an embodiment of the application
  • Figure 2 is a schematic diagram of deployment of NB-IoT carrier guard band mode in an embodiment of the application
  • FIG. 3 is a schematic diagram of deployment of an NB-IoT carrier in-band mode in an embodiment of the application
  • FIG. 4 is a schematic flowchart of a synchronization signal transmission method in an embodiment of the application.
  • FIG. 5 is a schematic diagram of frequency domain resources in an embodiment of this application.
  • FIG. 6 is a first structural diagram of a communication device in an embodiment of this application.
  • FIG. 7 is a second structural diagram of a communication device in an embodiment of this application.
  • FIG. 8 is a third structural diagram of a communication device in an embodiment of this application.
  • FIG. 9 is a fourth structural diagram of a communication device in an embodiment of this application.
  • the corresponding device may include one or more units such as functional units to perform the described one or more method steps (for example, one unit performs one or more steps) , Or multiple units, each of which performs one or more of multiple steps), even if such one or more units are not explicitly described or illustrated in the drawings.
  • the corresponding method may include one step to perform the functionality of one or more units (for example, one step performs one or more units). The functionality, or multiple steps, each of which performs the functionality of one or more of the multiple units), even if such one or more steps are not explicitly described or illustrated in the drawings.
  • the embodiment of the present application provides a communication system, and the communication system may be an NB-IoT system.
  • the communication system may include terminals and network equipment.
  • the above-mentioned network side equipment may be a communication device on the access network side to support terminal access to the wireless communication system, for example, it may be an evolved NodeB (eNB) in a 4G access technology communication system, and 5G access technology communication
  • eNB evolved NodeB
  • the above-mentioned terminal may be a communication device that provides voice or data connectivity to users, for example, it may also be user equipment (UE), mobile station (mobile station), subscriber unit (subscriber unit), station (STAtion), or Terminal (terminal equipment, TE), etc.
  • the terminal can also be a cellular phone (cellular phone), personal digital assistant (PDA, Personal Digital Assistant), wireless modem (modem), handheld device (handheld), laptop computer (laptop computer), cordless phone (cordless phone), Wireless local loop (wireless local loop, WLL) station or tablet computer (pad), etc.
  • devices that can access the wireless communication system, communicate with the network side of the wireless communication system, or communicate with other devices through the wireless communication system can all be the terminals in the embodiments of the present application, such as , Terminals and cars in smart transportation, household equipment in smart homes, power meter reading equipment in smart grids, voltage monitoring equipment, environmental monitoring equipment, video monitoring equipment in smart security networks, cash registers, etc.
  • the terminal can communicate with the network device, and multiple terminals can also communicate with each other.
  • the terminal can be statically fixed or mobile.
  • the terminal or communication device described in the embodiment of the present application may also be a part of any of the foregoing devices, such as a chip, a chip system, or a circuit structure, etc.
  • the above-mentioned NB-IoT system supports three deployment modes: standalone mode, guardband mode, and in-band mode.
  • Fig. 1 is a schematic diagram of the deployment of the NB-IoT carrier in the independent mode in the embodiment of the application.
  • an independent frequency band is used, such as using the Global System for Mobile Communications ( One or more carriers in the global system for mobile communications (GSM) network are used to transmit NB-IoT data, and the bandwidth of one resource block is 180 kHz.
  • GSM global system for mobile communications
  • the frequency band of NB-IoT does not depend on the frequency band of LTE, and NB-IoT and LTE can be completely decoupled.
  • Figure 2 is a schematic diagram of the deployment of the NB-IoT carrier guard band mode in an embodiment of the application.
  • the unused one of the LTE carrier guard bands in the LTE channel bandwidth is used
  • multiple resource blocks to transmit NB-IoT data is 180kHz.
  • Figure 3 is a schematic diagram of the deployment of the NB-IoT carrier in-band mode in an embodiment of the application.
  • the NB-IoT carrier when the NB-IoT carrier is deployed in the in-band mode, one or more resource blocks in the LTE carrier are used to transmit NB -IoT, the bandwidth of one resource block is 180kHz. Or use one or more resource blocks in the NR (New radio) carrier to transmit NB-IoT.
  • the deployment mode of NB-IoT may also be a guard band mode.
  • carriers can be divided into anchor carriers and non-anchor carriers.
  • narrowband primary synchronization signal (NPSS) and narrowband secondary are transmitted.
  • the carrier of the synchronization signal (narrowband secondary synchronization signal, NSSS) and the narrowband physical broadcast channel (NPBCH) is the anchor carrier, and the carrier that does not transmit NPSS, NSSS, and NPBCH is the non-anchor carrier.
  • the center carrier frequency F DL (MHz) must satisfy the following formula (1):
  • F DL F DL_low +0.1(N DL -N Offs-DL )+0.0025(2M DL +1) (1)
  • F DL_low is the lowest downlink frequency point of the corresponding frequency band
  • N DL is the Evolved-Universal Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN) EARFCN
  • E-UTRA Evolved-Universal Terrestrial Radio Access
  • EARFCN Absolute Radio Frequency Channel Number
  • M DL is the offset channel number of EARFCN.
  • the value range of M DL is ⁇ -10,-9,-8,-7,-6,-5,-6,-3,-2,-1,-0.5,0,1 , 2, 3, 4, 5, 6, 7, 8, 9 ⁇ .
  • the value range of M DL is ⁇ -10,-9,-8.5,-8,-7,-6,-5,-4.5,-4,-3,-2,-1, -0.5,0,1,2,3,3.5,4,5,6,7,7.5,8,9 ⁇ .
  • the terminal Before the terminal accesses the NB-IoT, it first needs to perform a blind search on the synchronization signal sent by the network device, that is, the NPSS and/or NSSS signal. Specifically, the terminal detects whether there is a synchronization signal (which may include NPSS and/or NSSS) at a frequency that satisfies the center frequency formula of the anchor carrier (that is, the above formula (1)) and the value of the above M DL . If the terminal detects the NPSS and/or NSSS signal, it indicates that the terminal synchronization is successful, and the next operation can be performed, such as receiving NPBCH, system information blocks-narrowband (SIB-NB), random access and other operations. If the terminal does not detect the NPSS and/or NSSS signal, the terminal needs to continue to perform a blind search on other frequencies that satisfy the above formula until it is detected.
  • a synchronization signal which may include NPSS and/or NSSS
  • SIB-NB system information blocks
  • an embodiment of the present application provides a synchronization signal transmission method, which can be applied to the aforementioned NB-IoT system.
  • FIG. 4 is a schematic flowchart of a synchronization signal transmission method in an embodiment of the application.
  • the above-mentioned synchronization signal transmission method may include:
  • the network device determines the first frequency domain resource and the second frequency domain resource
  • the first frequency domain resource may be a frequency domain resource used for transmitting (that is, sending or receiving) the first synchronization signal, and the bandwidth of the first frequency domain resource may be 12 subcarriers, that is, one PRB, where the subcarrier interval may be It is 15 kHz;
  • the second frequency domain resource may be a frequency domain resource used for transmitting (that is, sending or receiving) the second synchronization signal, and the second frequency domain resource may include at least one PRB.
  • a PRB can be composed of 12 consecutive subcarriers (ie, subcarrier 0 to subcarrier 11), then the center frequency of a PRB can be the frequency point between subcarrier 5 and subcarrier 6.
  • FIG. 5 is a schematic diagram of frequency domain resources in an embodiment of this application.
  • the first frequency domain resource may include one PRB (denoted as PRB n ), the center frequency of PRB n is F DL1 ,
  • the center frequency F DL2 of PRB m can also have other values, but it needs to satisfy the above formula (1).
  • the second synchronization signal sent on multiple PRBs can be extended to multiple PRBs, so as to increase the length of the second synchronization signal sequence.
  • the following second frequency domain resource includes a PRB as an example to describe the synchronization signal transmission method provided in the embodiment of the present application.
  • the first frequency domain resource may be recorded as PRB n
  • the second frequency domain resource may be recorded as PRB m .
  • the first synchronization signal may include traditional NPSS (i.e. first NPSS) and/or traditional NSSS (first NSSS).
  • traditional NPSS refers to NPSS (i.e. legacy NPSS) in the existing protocol.
  • traditional NSSS refers to NSSS (ie legacy NSSS) in the existing agreement.
  • the aforementioned legacy NPSS sequence d l (n) can satisfy:
  • n is the index of the legacy NPSS sequence
  • n 0,1,...,10
  • is the root index of the Zadoff-Chu sequence
  • 5
  • S(l) is the cover code sequence
  • the foregoing legacy NSSS sequence d(n) can satisfy:
  • the above-mentioned second synchronization signal may be completely or partially the same as the first synchronization signal, that is, the second synchronization signal may include legacy NPSS and/or legacy NSSS.
  • the above F DL2 satisfies formula (1),
  • the value of M DL is not equal to ⁇ -2, -1, -0.5, 0, 1 ⁇ , to avoid affecting the blind search synchronization signal of the terminal in the existing network.
  • the second synchronization signal is partly the same as the first synchronization signal
  • the first synchronization signal includes legacy NPSS and non-legacy NSSS
  • the second synchronization signal may include legacy NPSS and non-legacy NSSS
  • the second synchronization signal may include The non-legacy NPSS and legacy NSSS, or the second synchronization signal may include other combinations, which will not be repeated here.
  • the first synchronization signal, the second synchronization signal, the first frequency domain resource, and the second frequency domain resource may also have other situations, which are not specifically limited in the embodiment of the present application.
  • the second synchronization signal may also be legacy NPSS and non-legacy NSSS in one PRB of the second frequency domain resource.
  • the other PRB is other combinations.
  • the second synchronization signal may also be completely different from the first synchronization signal, that is, the second synchronization signal may include a second NPSS, that is, a non-legacy NPSS (non-legacy NPSS) and/or a second NSSS, that is, Non-traditional NSSS (non-legacy NSSS).
  • a second NPSS that is, a non-legacy NPSS (non-legacy NPSS)
  • a second NSSS that is, Non-traditional NSSS (non-legacy NSSS).
  • the aforementioned non-legacy NPSS sequence d′ l (n) may satisfy the following formula:
  • S(l) is the cover code sequence in the legacy NPSS sequence d l (n), for example, S(l) shown in Table 1 above, S'(l) is the non-legacy NPSS sequence d' l (n)
  • the aforementioned non-legacy NSSS sequence d′(n) can satisfy:
  • Zadoff- The root index of the Chu sequence, Is the cell identity;
  • ⁇ f is the cyclic shift, n f is the wireless frame number;
  • the non-legacy NSSS in the above formulas (10) and (16) change the binary scrambling code sequence of the legacy NSSS, so that b′ q (m) and b q (m) is partially different or completely different.
  • b′ 0 (m) can be:
  • b′ 2 (m) can be:
  • b′ 3 (m) can be:
  • non-legacy NPSS sequence and non-legacy NSSS sequence may also be other sequences, which are not specifically limited in the embodiment of the present application.
  • the network device sends a first synchronization signal on the first frequency domain resource, and sends a second synchronization signal on the second frequency domain resource.
  • the synchronization signal is sent on the frequency domain resources (that is, PRB n and PRB m ) centered on F DL2 .
  • the network device sends legacy NPSS and legacy NSSS on PRB n , and sends non-legacy NPSS and/or non-legacy NSSS on PRB m .
  • the network device can also send legacy NPSS on PRB n and PRB m , respectively.
  • legacy NSSS of course, there may be other situations, which are not specifically limited in the embodiments of this application.
  • the network device maps the synchronization signal in the order of frequency domain first and time domain. Specifically, the network device maps the legacy NPSS in the first synchronization signal, such as the NPSS sequence d l (n), first in the frequency domain to subcarriers 0 to 10 of PRB n , and then in the time domain according to n The increasing order is mapped to symbol 3 to symbol 13 of subframe 5 of each radio frame.
  • the network device maps the legacy NSSS in the first synchronization signal, such as the NSSS sequence d(n), in the frequency domain to subcarriers 0 to 11 of PRB n , and then maps it to the even radio in the time domain.
  • Symbols 3 to 13 of subframe 9 of the frame for frequency division duplexing (FDD) NB-IoT systems
  • Symbol 13 for time division duplexing (TDD) NB-IoT system.
  • the network device first maps the legacy NPSS and/or non-legacy NPSS in the second synchronization signal, such as the NPSS sequence d' l (n), to subcarriers 0 to 10 of PRB m in the frequency domain. Then, in the time domain, they are mapped to symbols 3 to 13 of subframe 5 of each radio frame in the order of increasing n.
  • the network device maps the legacy NSSS and/or non-legacy NSSS in the second synchronization signal, such as the NSSS sequence d′(n), in the frequency domain to subcarriers 0 to 11 of PRB m , and then In the time domain, mapped to symbols 3 to 13 of subframe 9 of an even-numbered radio frame (for FDD NB-IoT systems), or mapped to symbols 3 to symbol 13 of sub-frame 0 of an even-numbered radio frame in the time domain Up (for TDD NB-IoT system).
  • the legacy NSSS and/or non-legacy NSSS in the second synchronization signal such as the NSSS sequence d′(n)
  • the network device when it maps the second synchronization signal in the time domain, it may also map the second synchronization signal on subframes other than some specific subframes in the radio frame. Specifically, the network device maps the legacy NPSS and/or non-legacy NPSS in the second synchronization signal to symbols 3 to 13 of the first subframe of the radio frame, where the first subframe may be the radio frame Except for the subframes used to transmit the first synchronization signal (including legacy NPSS and/or legacy NSSS), the subframes used to transmit the legacy NSSS and/or non-legacy NSSS in the second synchronization signal, and the subframes used to transmit the NPBCH Frames and other subframes other than the subframes used to transmit system information blocks type 1 (SIB1), such as subframe 6, etc.
  • SIB1 system information blocks type 1
  • the network device maps the legacy NSSS and/or non-legacy NSSS in the second synchronization signal to symbols 3 to 13 of the second subframe of the even-numbered radio frame, where the second subframe can be divided by the radio frame for
  • the subframe for transmitting the first synchronization signal including legacy NPSS and/or legacy NSSS
  • the subframe for transmitting the legacy NPSS and/or non-legacy NPSS in the second synchronization signal the subframe for transmitting NPBCH
  • Subframes other than the subframe in which SIB1 is sent such as subframe 8.
  • the network device maps the NPSS and NSSS in the second synchronization signal, they respectively map the two to different subframes.
  • the network device maps the non-legacy NPSS sequence d′ l (n) to sub-carriers 0 to 10 of subframe 6 of each radio frame, and maps the non-legacy NSSS sequence d′(n) to the even-numbered radio frame On subcarriers 0 to 11 of subframe 8.
  • first subframe is subframe 6 and the second subframe is subframe 8; or the first subframe is subframe 6 and the second subframe is subframe 1; or the first subframe is subframe 4 , The second subframe is subframe 8.
  • the network device when it maps the first synchronization signal in the time domain, it can also map the legacy NPSS in the first synchronization signal, such as the NPSS sequence d l (n), to the sub-frame of each radio frame. Symbol 3 to symbol 13 of frame 5, and randomly select 3 consecutive symbols or 3 discontinuous symbols from symbol 3 to symbol 13 of subframe 5, and then copy the signal sequence mapped on these 3 symbols to The symbol 0 to the symbol 2 of the subframe 5 are mapped to the 14 symbols of the subframe 5, so as to increase the resources for sending synchronization signals, thereby improving the coverage of the synchronization signals.
  • the legacy NPSS in the first synchronization signal such as the NPSS sequence d l (n)
  • the network device maps the NPSS sequence d l (n) to symbols 3 to 13 in subframe 5, and selects consecutive symbols 4 to 6 from symbols 3 to 13, or symbols 11 to 13, or selects no For consecutive symbols 3, 5, 6, or symbols 9, 10, 13, copy the signal sequence mapped on these 3 symbols to symbols 0 to symbol 2 of subframe 5, so that symbols 0 to symbol 13 on subframe 5
  • the above are all mapped with a signal sequence, and the signal sequence on symbol 0 to symbol 2 is the same as the sequence on the selected 3 symbols.
  • the legacy NSSS in the first synchronization signal, the NPSS in the second synchronization signal, and/or the NSSS in the second synchronization signal can also use the above-mentioned method for time-frequency mapping, so as to increase the resources for sending synchronization signals, and then Improve synchronization signal coverage.
  • S403 The terminal determines the first frequency domain resource and the second frequency domain resource
  • the terminal considers that the synchronization signal can be detected on frequency domain resources centered on F DL1 and F DL2 , such as PRB n centered on F DL1 and PRB m centered on F DL2 .
  • S404 The terminal receives the first synchronization signal on the first frequency domain resource, and receives the second synchronization signal on the second frequency domain resource.
  • the terminal performs a blind search for the synchronization signal on the frequency domain resources determined to be centered on F DL1 and F DL2, so as to receive the first synchronization signal on PRB n and the second synchronization signal on PRB m .
  • the terminal may receive the second synchronization signal on PRB m after receiving the first synchronization signal from PRB n .
  • the aforementioned non-legacy NPSS and/or non-legacy NSSS can be directly and repeatedly extended to multiple PRBs on.
  • the non-legacy NPSS on PRB m1 can be equation (4)
  • the non-legacy NSSS can be equation (10)
  • the non-legacy NPSS on PRB m2 can be equation (4)
  • the non-legacy NSSS can be Formula (10), and so on, the second synchronization signal on multiple PRB resources can be obtained.
  • the use of other non-legacy NPSS and/or non-legacy NSSS sequences for repeated extension is similar, and will not be repeated here.
  • the non-legacy NPSS and/or non-legacy NSSS on each PRB may not be completely the same, or It can be completely different.
  • non-legacy NPSS on PRB m1 can be formula (4)
  • non-legacy NSSS can be formula (10)
  • non-legacy NPSS on PRB m2 can be formula (4)
  • non-legacy NSSS can be formula (11).
  • different combinations with legacy NPSS and legacy NSSS can also be considered.
  • PRB m1 is legacy NPSS and non-legacy NSSS
  • non-legacy NSSS can be equation (10)
  • PRB m2 is legacy NPSS and non-legacy NSSS
  • the non-legacy NSSS can be formula (11).
  • the second synchronization signal may be extended on multiple PRBs in other ways, which is not specifically limited in the embodiment of the present application.
  • the second synchronization signal is sent by adding the second frequency domain resource, thereby improving the coverage of the synchronization signal, so that the terminal can blindly search for the synchronization signal from the first frequency domain resource and the second frequency domain resource , which greatly increases the probability of the terminal receiving the synchronization signal, thereby increasing the success rate of the terminal accessing the network, reducing the delay of the terminal accessing the network, and optimizing the power consumption of the terminal.
  • the network device maps the non-legacy NPSS sequence d' l (n) to subframe 6 of each radio frame, and maps the non-legacy NSSS sequence d'( n) Map to subframe 8 of an even radio frame.
  • an embodiment of the present application provides a communication device.
  • the communication device may be a synchronization signal transmission device or a chip or a system on a chip in the synchronization signal transmission device, and may also be used in the synchronization signal transmission device.
  • a functional module that implements the first aspect or the method described in any possible implementation manner of the first aspect.
  • the communication device can implement the functions performed by the terminal in the foregoing aspects or in each possible implementation manner, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • FIG. 6 is a first structural diagram of a communication device in an embodiment of this application. As shown in FIG.
  • the communication device 600 may include: a processing module 601 for determining a first frequency domain resource and a second frequency domain. Domain resource, the first frequency domain resource is used for the transmission of the first synchronization signal, and the second frequency domain resource is used for the transmission of the second synchronization signal, where the second frequency domain resource includes at least one physical resource block PRB, in at least one PRB
  • the first synchronization signal includes the first narrowband primary synchronization signal NPSS and/or the first narrowband secondary synchronization signal NSSS;
  • the second synchronization signal includes the first NPSS and/or the first NSSS;
  • the first NPSS sequence d l (n) satisfies:
  • S(l) is the covering code sequence
  • l is the symbol index in the time domain
  • l 3,4,5,...,13.
  • the first NSSS sequence d(n) satisfies:
  • the first synchronization signal includes the first NPSS and/or the first NSSS; the second synchronization signal includes the second NPSS and/or the second NSSS, the first NPSS is different from the second NPSS, and the first NSSS Different from the second NSSS.
  • the second NPSS sequence d' l (n) satisfies:
  • S(l) is the cover code sequence in the first NPSS sequence d l (n)
  • S'(l) is the cover code sequence in the second NPSS sequence d' l (n)
  • l is the cover code sequence in the time domain
  • Symbol index, l 3,4,5,...,13
  • the second NSSS sequence d′(n) satisfies:
  • the second frequency domain resource includes at least two PRBs, and any two PRBs of the at least two PRBs have different center frequencies.
  • the communication module mentioned in the embodiment of the present application may be a transceiver interface, a transceiver circuit or a transceiver, etc.; the processing module may be one or more processors.
  • an embodiment of the present application provides a communication device.
  • the communication device may be a synchronization signal transmission device or a chip or a system on a chip in the synchronization signal transmission device, and may also be used in the synchronization signal transmission device.
  • a functional module that implements the second aspect or the method described in any possible implementation manner of the second aspect.
  • the communication device can implement the functions performed by the network device in the foregoing aspects or various possible implementations, and the functions can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the aforementioned functions.
  • FIG. 7 is the second structural diagram of the communication device in the embodiment of this application. As shown in FIG.
  • the first synchronization signal includes the first narrowband primary synchronization signal NPSS and/or the first narrowband secondary synchronization signal NSSS;
  • the second synchronization signal includes the first NPSS and/or the first NSSS;
  • the first NPSS sequence d l (n) satisfies:
  • S(l) is the covering code sequence
  • l is the symbol index in the time domain
  • l 3,4,5,...,13.
  • the first NSSS sequence d(n) satisfies:
  • the first synchronization signal includes the first NPSS and/or the first NSSS; the second synchronization signal includes the second NPSS and/or the second NSSS, the first NPSS is different from the second NPSS, and the first NSSS Different from the second NSSS.
  • the second NPSS sequence d′(n) satisfies:
  • S(l) is the cover code sequence in the first NPSS sequence d l (n)
  • S'(l) is the cover code sequence in the second NPSS sequence d' l (n)
  • l is the cover code sequence in the time domain
  • Symbol index, l 3,4,5,...,13
  • the second NSSS sequence d′(n) satisfies:
  • the second frequency domain resource includes at least two PRBs, and any two PRBs of the at least two PRBs have different center frequencies.
  • the communication module mentioned in the embodiment of the present application may be a transceiver interface, a transceiver circuit or a transceiver, etc.; the processing module may be one or more processors.
  • FIG. 8 is the communication device in an embodiment of this application. Schematic diagram three of the structure of, refer to the solid line shown in FIG. 8, the communication device 800 includes a processor 801, which is configured to couple with a memory, read and execute instructions in the memory, so as to realize the Steps of a synchronization signal transmission method based on NB-IoT on any terminal side.
  • the above-mentioned communication device further includes a memory 802, and the memory is used to store necessary computer-executed instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the steps of any terminal-side synchronization signal transmission method based on NB-IoT in the foregoing embodiments.
  • an embodiment of the present application provides a communication device, which may be a chip in a network device or a system on a chip.
  • the communication device can implement the above-mentioned aspects or the functions performed by the network device in each possible implementation manner.
  • the functions can be implemented by hardware.
  • FIG. 9 is an example of this application.
  • the fourth structural diagram of the communication device referring to the solid line shown in FIG. 9, the communication device 900 includes a processor 901, which is configured to couple with a memory, read and execute instructions in the memory, so as to realize Steps of a synchronization signal transmission method based on NB-IoT on any network device side.
  • the above-mentioned communication device further includes a memory 902, and the memory is used to store necessary computer-executed instructions and data of the communication device.
  • the processor executes the computer-executable instructions stored in the memory, so that the communication device executes the steps of the NB-IoT-based synchronization signal transmission method on the network device side in any of the above embodiments.
  • an embodiment of the present application provides a computer-readable storage medium.
  • the computer-readable storage medium stores instructions.
  • the instruction runs on a computer, it is used to execute any of the above-mentioned embodiments based on NB -The steps of the IoT synchronization signal transmission method.
  • embodiments of the present application provide a computer program or computer program product.
  • the computer program or computer program product is executed on a computer, the computer realizes any of the above-mentioned embodiments based on NB- The steps of the IoT synchronization signal transmission method.
  • the computer-readable medium may include a computer-readable storage medium, which corresponds to a tangible medium, such as a data storage medium, or a communication medium including any medium that facilitates the transfer of a computer program from one place to another (for example, according to a communication protocol) .
  • computer-readable media may generally correspond to (1) non-transitory tangible computer-readable storage media, or (2) communication media, such as signals or carrier waves.
  • Data storage media can be any available media that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and/or data structures for implementing the techniques described in this application.
  • the computer program product may include a computer-readable medium.
  • such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices, flash memory, or structures that can be used to store instructions or data Any other media that can be accessed by the computer in the form of desired program code. And, any connection is properly termed a computer-readable medium.
  • any connection is properly termed a computer-readable medium.
  • coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave to transmit instructions from a website, server, or other remote source
  • coaxial cable Wire, fiber optic cable, twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of media.
  • the computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other temporary media, but are actually directed to non-transitory tangible storage media.
  • magnetic disks and optical discs include compact discs (CD), laser discs, optical discs, digital versatile discs (DVD), and Blu-ray discs. Disks usually reproduce data magnetically, while discs use lasers to reproduce data optically. data. Combinations of the above should also be included in the scope of computer-readable media.
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • processor may refer to any of the foregoing structure or any other structure suitable for implementing the techniques described herein.
  • DSP digital signal processors
  • ASIC application-specific integrated circuits
  • FPGA field programmable logic arrays
  • the term "processor” as used herein may refer to any of the foregoing structure or any other structure suitable for implementing the techniques described herein.
  • the functions described by the various illustrative logical blocks, modules, and steps described herein may be provided in dedicated hardware and/or software modules configured for encoding and decoding, or combined Into the combined codec.
  • the technology may be fully implemented in one or more circuits or logic elements.
  • the technology of this application can be implemented in a variety of devices or devices, including wireless handsets, integrated circuits (ICs), or a set of ICs (for example, chipsets).
  • ICs integrated circuits
  • a set of ICs for example, chipsets.
  • Various components, modules, or units are described in this application to emphasize the functional aspects of the device for performing the disclosed technology, but they do not necessarily need to be implemented by different hardware units.
  • various units can be combined with appropriate software and/or firmware in the codec hardware unit, or by interoperating hardware units (including one or more processors as described above). provide.

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Abstract

本申请提供一种基于窄带物联网的同步信号传输方法及装置。该方法包括:通信装置确定第一频域资源和第二频域资源,所述第一频域资源用于第一同步信号的传输,所述第二频域资源用于第二同步信号的传输,其中,所述第二频域资源包括至少一个物理资源块PRB,所述至少一个PRB中的每一个PRB的中心频率F DL2均满足:F DL2=F DL1+k×180kHz;其中,F DL1为所述第一频域资源的中心频率,k为非零整数;所述通信装置在所述第一频域资源上接收所述第一同步信号,以及在所述第二频域资源上接收所述第二同步信号。在本申请中,通过增加频域资源来发送同步信号,以提高同步信号的覆盖,进而提高终端接入窄带物联网的成功率,减少终端接入窄带物联网的时延,进而优化终端的功耗。

Description

一种基于窄带物联网的同步信号传输方法及装置
本申请要求于2019年05月10日提交中国专利局、申请号为201910389985.4、申请名称为“一种基于窄带物联网的同步信号传输方法及装置”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域,特别涉及一种基于窄带物联网的同步信号传输方法及装置。
背景技术
物联网(Internet of things,IoT)是“物物相连的互联网”。它将互联网的用户端扩展到了任何物品与物品之间,进行信息交换和通信。这样的通信方式也可以称为机器间通信(Machine Type Communications,MTC),通信的节点可以称为MTC终端。典型的物联网应用包括智能电网、智能农业、智能交通、智能家居以及环境检测等各个方面。由于物联网需要应用在多种场景中比如从室外到室内,从地上到地下,因而对物联网的设计提出了很多特殊的要求。其中包含有窄带物联网(NarrowBand-Internet of Thing,NB-IoT)的技术,NB-IoT技术中的系统带宽为180kHz,可以重用长期演进(Long Term Evolution,LTE)网络的频谱并降低与邻近LTE信道的相互干扰。
针对当前的NB-IoT技术,由于NB-IoT技术要求处于极差网络环境的终端都可以接入到网络,例如,处于地下室的终端,因此,对于NB-IoT网络中的同步信号的覆盖要求较高。但是,在实际NB-IoT网络中,由于如其它通信系统造成的干扰或者邻小区造成的干扰等下行干扰的存在,对于处于较差网络环境的终端来说,往往无法盲搜到窄带同步信号,或者耗费较长的时间才能检测到窄带同步信号,这就导致终端无法接入网络或者接入网络的时延较长,进而影响终端的功耗。
发明内容
本申请提供了一种基于窄带物联网的同步信号传输方法及装置,以提高终端接入NB-IoT网络的成功率,减少终端接入NB-IoT网络的时延,进而优化终端的功耗。
第一方面,本申请提供一种基于NB-IoT的同步信号传输方法,该方法应用于NB-IoT系统中的通信装置,该通信装置可以为终端。该方法包括:通信装置确定第一频域资源和第二频域资源,第一频域资源用于第一同步信号的传输,第二频域资源用于第二同步信号的传输,其中,第二频域资源包括至少一个物理资源块(physical resource block,PRB),至少一个PRB中的每一个PRB的中心频率F DL2均满足:F DL2=F DL1+k×180kHz;其中,F DL1为第一频域资源的中心频率,k为非零整数;通信装置在第一频域资源上接收第一同步信号以及在第二频域资源上接收第二同步信号。
这里,上述一个PRB由12个连续的子载波(即子载波0到子载波11)构成,一个PRB 的中心频率为子载波5和子载波6中间的频率点。
在本申请中,由于增加第二频域资源来传输第二同步信号,使得通信装置可以从第一频域资源和第二频域资源上盲搜同步信号,以此提高同步信号的覆盖,增加通信装置接收到同步信号的概率,进而提高通信装置接入NB-IoT网络的成功率,减少通信装置接入NB-IoT网络的时延,优化通信装置的功耗。
基于第一方面,在一些可能的实施方式下,第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;第二同步信号包括第一NPSS和/或第一NSSS;其中,第一NPSS序列d l(n)满足:
Figure PCTCN2020088975-appb-000001
其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13。当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
第一NSSS序列d(n)满足:
Figure PCTCN2020088975-appb-000002
其中,n=0,1,…,131,n′=n mod 131,mod表示取余操作,
Figure PCTCN2020088975-appb-000003
Figure PCTCN2020088975-appb-000004
为小区标识;
Figure PCTCN2020088975-appb-000005
n f是无线帧号;b q(m)为二进制序列,m=n mod128,
Figure PCTCN2020088975-appb-000006
表示对
Figure PCTCN2020088975-appb-000007
向下取整操作。
在本申请中,网络设备可以在第一频域资源和第二频域资源上布置相同的同步信号,如第一NPSS和/或第一NSSS,这里,第一NPSS可以称为传统NPSS(legacy NPSS),也就是现网协议所规定的NPSS,第一NSSS也可以成为传统NSSS(legacy NSSS),也就是现网协议所规定的NSSS。第二同步信号可以与第一同步信号完全相同或者部分相同,如此,尽可能的减少通信装置检测同步序列的复杂度。
基于第一方面,在一些可能的实施方式下,第一同步信号包括第一NPSS和/或第一NSSS;第二同步信号包括第二NPSS和/或第二NSSS,第一NPSS与第二NPSS不同,第一NSSS与第二NSSS不同。
在本申请中,第一同步信号与第二同步信号可以完全不同,以避免对现网中已有通信装置检测同步信号所造成的干扰。
基于第一方面,在一些可能的实施方式下,第二NPSS序列d′ l(n)满足:
Figure PCTCN2020088975-appb-000008
或者,
Figure PCTCN2020088975-appb-000009
或者,
Figure PCTCN2020088975-appb-000010
其中,S(l)为第一NPSS序列d l(n)中的覆盖码序列,S′(l)为第二NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
在本申请中,提供一种新的第二NPSS序列设计,以避免现网中已有的通信装置在第 二频率资源上检测到同步信号,并继续去检测窄带物理广播信道(narrowband physical broadcast channel,NPBCH)。由于在第二频域资源上是不存在NPBCH的,如果现网中已有的通信装置在第二频域资源上检测NPBCH,则会增加功耗,那么,设计新的第二NPSS序列能够避免这种情况的发生,进而减少对现网中已有的通信装置所造成的干扰。
基于第一方面,在一些可能的实施方式下,第二NSSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000011
或者,
Figure PCTCN2020088975-appb-000012
或者,
Figure PCTCN2020088975-appb-000013
其中,n=0,1,……,131;n′=n mod 131,mod表示取余操作;
Figure PCTCN2020088975-appb-000014
Figure PCTCN2020088975-appb-000015
为小区标识;
Figure PCTCN2020088975-appb-000016
n f是无线帧号;b q(m)为第一NSSS序列d(n)中的二进制序列,b′ q(m)为第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000017
Figure PCTCN2020088975-appb-000018
表示对
Figure PCTCN2020088975-appb-000019
向下取整操作,b q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000020
)和b′ q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000021
)中的至少一个取值不相等。
在本申请中,提供一种新的第二NSSS序列设计,以减少对现网中已有的通信装置所造成的干扰。
基于第一方面,在一些可能的实施方式下,第二频域资源包括至少两个PRB,至少两个PRB中的任意两个PRB的中心频率不同。
在本申请中,当第二频域资源包括至少两个PRB时,这些PRB中的任意两个PRB的中心频率是不同的,由于每个PRB的中心频率F DL2满足:F DL2=F DL1+k×180kHz,那么,每个PRB的F DL2根据k的取值不同而不同。
第二方面,本申请提供一种基于NB-IoT的同步信号传输方法,该方法应用于NB-IoT系统中的通信装置,该通信装置可以为网络设备。该方法包括:通信装置确定第一频域资源和第二频域资源,第一频域资源用于第一同步信号的传输,第二频域资源用于第二同步信号的传输,其中,第二频域资源包括至少一个PRB,至少一个PRB中的每一个PRB的中心频率F DL2均满足:F DL2=F DL1+k×180kHz;其中,F DL1为第一频域资源的中心频率,k为非零整数;通信装置在第一频域资源上发送第一同步信号,以及在第二频域资源上发送第二同步信号。
基于第二方面,在一些可能的实施方式下,第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;第二同步信号包括第一NPSS和/或第一NSSS;
第一NPSS序列d l(n)满足:
Figure PCTCN2020088975-appb-000022
其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13。当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
第一NSSS序列d(n)满足:
Figure PCTCN2020088975-appb-000023
其中,n=0,1,…,131,n′=n mod 131,mod表示取余操作,
Figure PCTCN2020088975-appb-000024
Figure PCTCN2020088975-appb-000025
为小区标识;
Figure PCTCN2020088975-appb-000026
n f是无线帧号;b q(m)为二进制序列,m=n mod128,
Figure PCTCN2020088975-appb-000027
表示对
Figure PCTCN2020088975-appb-000028
向下取整操作。
基于第二方面,在一些可能的实施方式下,第一同步信号包括第一NPSS和/或第一NSSS;第二同步信号包括第二NPSS和/或第二NSSS,第一NPSS与第二NPSS不同,第一NSSS与第二NSSS不同。
基于第二方面,在一些可能的实施方式下,第二NPSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000029
或者,
Figure PCTCN2020088975-appb-000030
或者,
Figure PCTCN2020088975-appb-000031
其中,S(l)为第一NPSS序列d l(n)中的覆盖码序列,S′(l)为第二NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
基于第二方面,在一些可能的实施方式下,第二NSSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000032
或者,
Figure PCTCN2020088975-appb-000033
或者,
Figure PCTCN2020088975-appb-000034
其中,n=0,1,……,131;n′=n mod 131,mod表示取余操作;
Figure PCTCN2020088975-appb-000035
为小区标识;
Figure PCTCN2020088975-appb-000036
n f是无线帧号;b q(m)为第一NSSS序列d(n)中的二进制序列,b′ q(m)为第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000037
Figure PCTCN2020088975-appb-000038
表示对
Figure PCTCN2020088975-appb-000039
向下取整操作,b q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000040
)和b′ q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000041
)中的至少一个取值不相等。
基于第二方面,在一些可能的实施方式下,第二频域资源包括至少两个PRB,至少两个PRB中的任意两个PRB的中心频率不同。
基于第二方面,在一些可能的实施方式下,在通信装置在第二频域资源上发送第二同步信号之前,方法还包括:网络侧设备在将第二同步信号中的第二NPSS和/或第二NPSS映射至至少一个PRB的子载波0至子载波10上之后,将第一NPSS和/或第一NPSS映射至无线帧的第一子帧的符号3至符号13上,其中,第一子帧为无线帧中除用于发送第一同步信号的子帧、用于发送第二同步信号中的第二NSSS和/或第二NSSS的子帧、用于发送窄带广播信道的子帧以及用于发送系统信息块1SIB1的子帧之外的子帧。
基于第二方面,在一些可能的实施方式下,在通信装置在第二频域资源上发送第二同步信号之前,方法还包括:网络侧设备在将第二同步信号中的第二NSSS和/或第二NSSS映射至至少一个PRB的子载波0至子载波10上之后,将第一NSSS和/或第一NSSS映射至无线帧的第二子帧的符号3至符号13上,其中,第二子帧为无线帧中除用于发送第一同步信号的子帧、用于发送第二同步信号中的第二NPSS和/或第二NPSS的第一子帧、用于发送窄带广播信道的子帧以及用于发送系统信息块1SIB1的子帧之外的子帧。
第三方面,本申请提供一种通信装置,该通信装置可以为同步信号传输装置或者同步信号传输装置中的芯片或者片上系统,还可以为同步信号传输装置中用于实现第一方面或第一方面的任一可能的实施方式所述的方法的功能模块。该通信装置可以实现上述各方面或者各可能的实施方式中终端所执行的功能,所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说,该通信装置,可以包括:处理模块,用于确定第一频域资源和第二频域资源,第一频域资源用于第一同步信号的传输,第二频域资源用于第二同步信号的传输,其中,第二频域资源包括至少一个PRB,至少一个PRB中的每一个PRB的中心频率F DL2均满足:F DL2=F DL1+k×180kHz;其中,F DL1为第一频域资源的中心频率,k为非零整数;通信模块,用于在第一频域资源上接收第一同步信号以及在第二频域资源上接收第二同步信号。
基于第三方面,在一些可能的实施方式下,第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;第二同步信号包括第一NPSS和/或第一NSSS;其中,
第一NPSS序列d l(n)满足:
Figure PCTCN2020088975-appb-000042
其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13。当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
第一NSSS序列d(n)满足:
Figure PCTCN2020088975-appb-000043
其中,n=0,1,…,131,n′=n mod 131,mod表示取余操作,,
Figure PCTCN2020088975-appb-000044
Figure PCTCN2020088975-appb-000045
为小区标识;
Figure PCTCN2020088975-appb-000046
n f是无线帧号;b q(m)为二进制序列,m=n mod128,
Figure PCTCN2020088975-appb-000047
表示对
Figure PCTCN2020088975-appb-000048
向下取整操作。
基于第三方面,在一些可能的实施方式下,第一同步信号包括第一NPSS和/或第一NSSS;第二同步信号包括第二NPSS和/或第二NSSS,第一NPSS与第二NPSS不同,第一NSSS与第二NSSS不同。
基于第三方面,在一些可能的实施方式下,第二NPSS序列d′ l(n)满足:
Figure PCTCN2020088975-appb-000049
或者,
Figure PCTCN2020088975-appb-000050
或者,
Figure PCTCN2020088975-appb-000051
其中,S(l)为第一NPSS序列d l(n)中的覆盖码序列,S′(l)为第二NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
基于第三方面,在一些可能的实施方式下,第二NSSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000052
或者,
Figure PCTCN2020088975-appb-000053
或者,
Figure PCTCN2020088975-appb-000054
其中,n=0,1,……,131;n′=n mod 131,mod表示取余操作,;
Figure PCTCN2020088975-appb-000055
Figure PCTCN2020088975-appb-000056
为小区标识;
Figure PCTCN2020088975-appb-000057
n f是无线帧号;b q(m)为第一NSSS序列d(n)中的二进制序列,b′ q(m)为第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000058
Figure PCTCN2020088975-appb-000059
表示对
Figure PCTCN2020088975-appb-000060
向下取整操作,b q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000061
)和b′ q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000062
)中的至少一个取值不相等。
基于第三方面,在一些可能的实施方式下,第二频域资源包括至少两个PRB,至少两个PRB中的任意两个PRB的中心频率不同。
上述第三方面中提到的通信模块可以为收发接口、收发电路或者收发器等;处理模块可以为一个或多个处理器。
第四方面,本申请提供一种通信装置,该通信装置可以为同步信号传输装置或者同步信号传输装置中的芯片或者片上系统,还可以为同步信号传输装置中用于实现第二方面或第二方面的任一可能的实施方式所述的方法的功能模块。该通信装置可以实现上述各方面或者各可能的实施方式中网络设备所执行的功能,所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说,该通信装置,可以包括:处理模块,用于确定第一频域资源和第二频域资源,第一频域资源用于第一同步信号的传输,第二频域资源用于第二同步信号的传输,其中,第二频域资源包括至少一个PRB,至少一个PRB中的每一个PRB的中心频率F DL2均满足:F DL2=F DL1+k×180kHz;其中,F DL1为第一频域资源的中心频率,k为非零整数;通信模块,用于在第一频域资源上发送第一同步信号,以及在第二频域资源上发送第二同步信号。
基于第四方面,在一些可能的实施方式下,第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;第二同步信号包括第一NPSS和/或第一NSSS;
第一NPSS序列d l(n)满足:
Figure PCTCN2020088975-appb-000063
其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13。当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
第一NSSS序列d(n)满足:
Figure PCTCN2020088975-appb-000064
其中,n=0,1,…,131,n′=n mod 131,mod表示取余操作,
Figure PCTCN2020088975-appb-000065
Figure PCTCN2020088975-appb-000066
为小区标识;
Figure PCTCN2020088975-appb-000067
n f是无线帧号;b q(m)为二进制序列,m=n mod128,
Figure PCTCN2020088975-appb-000068
表示对
Figure PCTCN2020088975-appb-000069
向下取整操作。
基于第四方面,在一些可能的实施方式下,第一同步信号包括第一NPSS和/或第一NSSS;第二同步信号包括第二NPSS和/或第二NSSS,第一NPSS与第二NPSS不同,第一NSSS与第二NSSS不同。
基于第四方面,在一些可能的实施方式下,第二NPSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000070
或者,
Figure PCTCN2020088975-appb-000071
或者,
Figure PCTCN2020088975-appb-000072
其中,S(l)为第一NPSS序列d l(n)中的覆盖码序列,S′(l)为第二NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
基于第四方面,在一些可能的实施方式下,第二NSSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000073
或者,
Figure PCTCN2020088975-appb-000074
或者,
Figure PCTCN2020088975-appb-000075
其中,n=0,1,……,131;n′=n mod 131,mod表示取余操作;
Figure PCTCN2020088975-appb-000076
为小区标识;
Figure PCTCN2020088975-appb-000077
n f是无线帧号;b q(m)为第一NSSS序列d(n)中的二进制序列,b′ q(m)为第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000078
Figure PCTCN2020088975-appb-000079
表示对
Figure PCTCN2020088975-appb-000080
向下取整操作,b q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000081
)和b′ q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000082
)中的至少一个取值不相等。
基于第四方面,在一些可能的实施方式下,第二频域资源包括至少两个PRB,至少两个PRB中的任意两个PRB的中心频率不同。
上述第四方面中提到的通信模块可以为收发接口、收发电路或者收发器等;处理模块可以为一个或多个处理器。
第五方面,本申请提供一种通信装置,包括处理器,处理器用于与存储器耦合,读取并执行存储器中的指令,以实现如上述第一方面任一项的基于窄带物联网的同步 信号传输方法。
基于第五方面,在一些可能的实施方式下,上述通信装置还包括存储器。
第六方面,本申请提供一种通信装置,包括处理器,处理器用于与存储器耦合,读取并执行存储器中的指令,以实现如上述第二方面任一项的基于窄带物联网的同步信号传输方法。
第七方面,本申请提供一种计算机可读存储介质,计算机可读存储介质存储有指令,当指令计算机上运行时,用于执行上述第一方面和第二方面中任一的基于窄带物联网的同步信号传输方法。
第八方面,本申请提供一种计算机程序或计算机程序产品,当计算机程序或计算机程序产品在计算机上被执行时,使得计算机实现上述第一方面和第二方面中任一的基于窄带物联网的同步信号传输方法。
第九方面,本申请提供一种通信系统,包括终端和网络设备;其中,终端,用于执行上述第一方面中任一的基于窄带物联网的同步信号传输方法;网络设备,用于执行上述第二方面中任一的基于窄带物联网的同步信号传输方法。可选的,该通信系统可以是NB-IoT系统。
应当理解的是,本申请的第三至九方面与本申请的第一方面和第二方面的技术方案一致,各方面及对应的可行实施方式所取得的有益效果相似,不再赘述。
附图说明
为了更清楚地说明本申请实施例或背景技术中的技术方案,下面将对本申请实施例或背景技术中所需要使用的附图进行说明。
图1为本申请实施例中NB-IoT载波独立模式部署的示意图;
图2为本申请实施例中NB-IoT载波保护带模式部署的示意图;
图3为本申请实施例中NB-IoT载波带内模式部署的示意图;
图4为本申请实施例中的同步信号传输方法的流程示意图;
图5为本申请实施例中的频域资源示意图;
图6为本申请实施例中的通信装置的结构示意图一;
图7为本申请实施例中的通信装置的结构示意图二;
图8为本申请实施例中的通信装置的结构示意图三;
图9为本申请实施例中的通信装置的结构示意图四。
具体实施方式
下面结合本申请实施例中的附图对本申请实施例进行描述。以下描述中,参考形成本申请一部分并以说明之方式示出本申请实施例的具体方面或可使用本申请实施例的具体方面的附图。应理解,本申请实施例可在其它方面中使用,并可包括附图中未描绘的结构或逻辑变化。因此,以下详细描述不应以限制性的意义来理解,且本申请的范围由所附权利要求书界定。例如,应理解,结合所描述方法的揭示内容可以同样适用于用于执行所述方法的对应设备或系统,且反之亦然。例如,如果描述一个或多个具体方法步骤,则对应的设备可以包含如功能单元等一个或多个单元,来执行所描述的一个或多个方法步骤(例 如,一个单元执行一个或多个步骤,或多个单元,其中每个都执行多个步骤中的一个或多个),即使附图中未明确描述或说明这种一个或多个单元。另一方面,例如,如果基于如功能单元等一个或多个单元描述具体装置,则对应的方法可以包含一个步骤来执行一个或多个单元的功能性(例如,一个步骤执行一个或多个单元的功能性,或多个步骤,其中每个执行多个单元中一个或多个单元的功能性),即使附图中未明确描述或说明这种一个或多个步骤。进一步,应理解的是,除非另外明确提出,本文中所描述的各示例性实施例和/或方面的特征可以相互组合。
本申请实施例提供一种通信系统,该通信系统可以是NB-IoT系统。该通信系统可以包括终端和网络设备。
上述网络侧设备可以是接入网侧用于支持终端接入无线通信系统的通信装置,例如,可以是4G接入技术通信系统中的演进型基站(evolved NodeB,eNB)、5G接入技术通信系统中的下一代基站(next generation NodeB,gNB)、发送接收点(transmission reception point,TRP)、中继节点(relay node,RN)、接入点(access point,AP)等。
上述终端可以是一种向用户提供语音或者数据连通性的通信装置,例如也可以为用户设备(user equipment,UE)、移动台(mobile station)、用户单元(subscriber unit)、站台(STAtion)或者终端(terminal equipment,TE)等。终端还可以为蜂窝电话(cellular phone)、个人数字助理(PDA,Personal Digital Assistant)、无线调制解调器(modem)、手持设备(handheld)、膝上型电脑(laptop computer)、无绳电话(cordless phone)、无线本地环路(wireless local loop,WLL)台或者平板电脑(pad)等。随着无线通信技术的发展,可以接入无线通信系统、可以与无线通信系统的网络侧进行通信,或者通过无线通信系统与其它设备进行通信的设备都可以是本申请实施例中的终端,譬如,智能交通中的终端和汽车、智能家居中的家用设备、智能电网中的电力抄表仪器、电压监测仪器、环境监测仪器、智能安全网络中的视频监控仪器、收款机等等。在本申请实施例中,终端可以与网络设备进行通信,多个终端之间也可以进行通信。终端可以是静态固定的,也可以是移动的。本申请实施例中所述的终端或者通信设备还可以是上述任一种设备中的一部分装置,例如芯片、芯片系统或者电路结构等
上述NB-IoT系统支持以独立(stand alone)模式、保护带(guard band)模式、带内(in-band)模式这三种部署模式工作。
具体来说,图1为本申请实施例中NB-IoT载波独立模式部署的示意图,参见图1所示,NB-IoT载波以独立模式部署时,利用独立的频带,如利用全球移动通信系统(global system for mobile communications,GSM)网络中的一个或者多个载波来传输NB-IoT的数据,其中一个资源块的带宽为180kHz。此时,NB-IoT的频带不依赖LTE的频带,NB-IoT与LTE可以完全解耦。
图2为本申请实施例中NB-IoT载波保护带模式部署的示意图,参见图2所示,NB-IoT载波以保护带模式部署时,利用LTE信道带宽中LTE载波保护带中未利用的一个或多个资源块来传输NB-IoT的数据,其中一个资源块的带宽为180kHz。或者利用NR保护带中未利用的一个或多个资源块来传输NB-IoT的数据。
图3为本申请实施例中NB-IoT载波带内模式部署的示意图,参见图3所示,NB-IoT载波以带内模式部署时,利用LTE载波内的一个或多个资源块来传输NB-IoT,其中一个 资源块的带宽为180kHz。或者利用NR(New radio)载波内的一个或多个资源块来传输NB-IoT。当利用NR载波内的一个或多个资源块来传输NB-IoT时,NB-IoT的部署模式还可以是保护带模式。
进一步地,在NB-IoT中,载波可以分为锚点载波(anchor carrier)和非锚点载波(non-anchor carrier),其中,发送窄带主同步信号(narrowband primary synchronization signal,NPSS)、窄带辅同步信号(narrowband secondary synchronization signal,NSSS)以及窄带物理广播信道(narrowband physical broadcast channel,NPBCH)的载波即为锚点载波,不发送NPSS、NSSS以及NPBCH的载波即为非锚点载波。
对于NB-IoT载波(即锚点载波和所有非锚点载波)来说,其中心载波频率F DL(MHz)必须满足以下公式(1):
F DL=F DL_low+0.1(N DL-N Offs-DL)+0.0025(2M DL+1)       (1)
其中,F DL_low为对应频段的最低下行频点,N DL为演进的通用陆基无线接入绝对无线频率信道号(EARFCN,Evolved-Universal Terrestrial Radio Access(E-UTRA)Absolute Radio Frequency Channel Number)EARFCN,N offs-DL为对应频段的最低下行频点号,M DL为EARFCN的偏移信道号。对于FDD NB-IoT,M DL的取值范围为{-10,-9,-8,-7,-6,-5,-6,-3,-2,-1,-0.5,0,1,2,3,4,5,6,7,8,9}。对于TDD NB-IoT,M DL的取值范围为{-10,-9,-8.5,-8,-7,-6,-5,-4.5,-4,-3,-2,-1,-0.5,0,1,2,3,3.5,4,5,6,7,7.5,8,9}。
具体地,当锚点载波以带内模式或者保护带模式进行部署时,M DL的取值范围为{-2,-1,0,1},即M DL={-2,-1,0,1};而当锚点载波以独立模式进行部署时,M DL的取值为-0.5,即M DL=-0.5。
在终端接入NB-IoT之前,首先需要对网络设备发送的同步信号,即NPSS和/或NSSS信号进行盲搜。具体来说,终端在满足锚点载波的中心频率公式(即上述公式(1))和上述M DL的取值的频率处去检测是否有同步信号(可以包括NPSS和/或NSSS)。若终端检测到NPSS和/或NSSS信号,则表示终端同步成功,可以进行下一步操作,如接收NPBCH、系统信息块(system information blocks-narrowband,SIB-NB)、随机接入等操作。若终端未检测到NPSS和/或NSSS信号,则终端需要继续在其他满足上述公式的频率上进行盲搜,直到检测到为止。
但是,在实际网络中,由于下行干扰(例如其它系统造成的干扰,邻小区的干扰等)的存在,对于处于较差网络环境的终端来说,往往无法盲搜到NPSS和/或NSSS信号,或者耗费较长的时间才能检测到NPSS和/或NSSS信号,导致终端不能接入网络或者接入网络的时延很长,进而影响终端的功耗。
那么,为了解决这一问题,本申请实施例提供一种同步信号传输方法,该方法可以应用于上述NB-IoT系统。
结合上述NB-IoT系统,图4为本申请实施例中的同步信号传输方法的流程示意图,参见图4所示,上述同步信号传输方法可以包括:
S401:网络设备确定第一频域资源和第二频域资源;
其中,第一频域资源可以为用于传输(即发送或者接收)第一同步信号的频域资源,第一频域资源的带宽可以为12个子载波,即一个PRB,其中,子载波间隔可以为15kHz; 第二频域资源可以为用于传输(即发送或者接收)第二同步信号的频域资源,第二频域资源可以包括至少一个PRB。
需要说明的是,一个PRB可以由12个连续的子载波(即子载波0到子载波11)构成,那么,一个PRB的中心频率就可以为子载波5和子载波6中间的频率点。
在实际应用中,第二频域资源可以包括至少一个PRB,每一个PRB的中心频率F DL2均需要满足:F DL2=F DL1+k×180kHz,k为非零整数,也就是说,k可以取正整数或者负整数。当第二频域资源包括一个PRB时,第二频域资源的中心频率为该PRB的中心频率F DL2;当第二频域资源包括多个PRB时,第二频域资源的中心频率可以由多个PRB的中心频率F DL2组成,多个PRB中的任意两个PRB的F DL2是不同的,也就是说,多个PRB的F DL2均满足:F DL2=F DL1+k×180kHz,且每个PRB的F DL2根据k的取值不同而不同。
具体来说,图5为本申请实施例中的频域资源示意图,参见图5所示,第一频域资源可以包括一个PRB(记为PRB n),PRB n的中心频率为F DL1,第二频域资源可以为一个PRB(记为PRB m),PRB m的中心频率F DL2=F DL1+180kHz,当然,也可以为F DL2=F DL1-180kHz,或者F DL2=F DL1+360kHz,或者F DL2=F DL1-360kHz。PRB m的中心频率F DL2还可以有其他取值,但是需要满足上述公式(1)。
或者,第二频域资源还可以包括多个PRB(记为PRB m1,PRB m2……),每一个PRB的中心频率F DL2均需要满足:F DL2=F DL1+k×180kHz,那么,第二频域资源的中心频率F DL2就可以包括PRB m1的中心频率F DL2和PRB m1的中心频率F DL2。此时,多个PRB上发送的第二同步信号可以扩展到多个PRB上,以此来增加第二同步信号序列的长度。
需要说明的是,下面第二频域资源包括一个PRB为例来对本申请实施例提供的同步信号传输方法进行说明。此时,第一频域资源可以记为PRB n,第二频域资源可以记为PRB m
在本申请实施例中,第一同步信号可以包括传统NPSS(即第一NPSS)和/或传统NSSS(第一NSSS),这里,传统NPSS是指现有协议中的NPSS(即legacy NPSS),传统NSSS是指现有协议中的NSSS(即legacy NSSS)。
举例来说,上述legacy NPSS序列d l(n)可以满足:
Figure PCTCN2020088975-appb-000083
其中,n为legacy NPSS序列的索引,n=0,1,…,10,μ为Zadoff-Chu序列的根索引,μ=5,S(l)为覆盖码(cover code)序列,l为时域上的符号索引,l=3,4,5,…,13。
在本申请实施例中,当l=3,4,5,…,13时,S(l)的具体取值可以如下表1所示:
表1
Figure PCTCN2020088975-appb-000084
上述legacy NSSS序列d(n)可以满足:
Figure PCTCN2020088975-appb-000085
其中,n为传统NSSS序列的索引,n=0,1,……,131;n′为Zadoff-Chu序列的索引,n′=n mod 131,mod表示取余操作;μ为Zadoff-Chu序列的根索引,
Figure PCTCN2020088975-appb-000086
Figure PCTCN2020088975-appb-000087
为小区标识;θ f为循环移位(cyclic shift),
Figure PCTCN2020088975-appb-000088
n f是无线帧 号;b q(m)为二进制序列,m和q为生成二进制序列的参数,m=n mod 128,
Figure PCTCN2020088975-appb-000089
Figure PCTCN2020088975-appb-000090
表示对
Figure PCTCN2020088975-appb-000091
向下取整操作。
在本申请实施例中,b q(m)的具体取值可以如下表2所示:
表2
Figure PCTCN2020088975-appb-000092
进一步地,上述第二同步信号可以与第一同步信号完全相同或者部分相同,也就是说,第二同步信号可以包括legacy NPSS和/或legacy NSSS,此时,上述F DL2满足公式(1),但是M DL的取值不等于{-2,-1,-0.5,0,1},避免对现网中的终端盲搜同步信号造成影响。当第二同步信号与第一同步信号部分相同时,若第一同步信号包含legacy NPSS和non-legacy NSSS时,第二同步信号可以包括legacy NPSS和non-legacy NSSS,或者第二同步信号可以包括non-legacy NPSS和legacy NSSS,或者第二同步信号可以包括其它组合情况,在此不在赘述。当然,第一同步信号、第二同步信号、第一频域资源以及第二频域资源还可以存在其他情况,本申请实施例不作具体限定。
在一些可能的实施方式中,当第二频域资源包括多个PRB时,第二同步信号还可以在第二频域资源的一个PRB为legacy NPSS和non-legacy NSSS,在第二频域资源的另外一个PRB上是其它的组合情况。
另一方面,第二同步信号还可以与第一同步信号完全不同,也就是说,第二同步信号可以包括第二NPSS,即非传统NPSS(non-legacy NPSS)和/或第二NSSS,即非传统NSSS(non-legacy NSSS)。
在一些可能的实施方式中,上述non-legacy NPSS序列d′ l(n)可以满足以下公式:
Figure PCTCN2020088975-appb-000093
或者,
Figure PCTCN2020088975-appb-000094
或者,
Figure PCTCN2020088975-appb-000095
或者,
Figure PCTCN2020088975-appb-000096
或者,
Figure PCTCN2020088975-appb-000097
或者,
Figure PCTCN2020088975-appb-000098
其中,S(l)为legacy NPSS序列d l(n)中的覆盖码序列,例如上表1所示的S(l),S′(l)为non-legacy NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,当l=3,4,5,…,13时,S′(l)与S(l)中的至少一个取值不相等;μ和μ′为Zadoff-Chu序列的根索引,μ=5,μ′为正整数且μ′≠5;n为所述non-legacy NPSS序列的索引,n=0,1,…,10。
在本申请实施例中,当l=3,4,5,…,13时,S′(l)的具体取值可以如下表3所示:
表3
Figure PCTCN2020088975-appb-000099
在实际应用中,S′(l)还可以有其他取值,只要当l=3,4,5,…,13时,S′(l)与S(l)中的至少一个取值不相等即可,本申请实施例不作具体限定。
上述non-legacy NSSS序列d′(n)可以满足:
Figure PCTCN2020088975-appb-000100
或者,
Figure PCTCN2020088975-appb-000101
或者,
Figure PCTCN2020088975-appb-000102
或者,
Figure PCTCN2020088975-appb-000103
或者,
Figure PCTCN2020088975-appb-000104
或者,
Figure PCTCN2020088975-appb-000105
或者,
Figure PCTCN2020088975-appb-000106
其中,n为non-legacy NSSS序列的索引,n=0,1,……,131;n′为Zadoff-Chu序列的索引,n′=n mod 131,mod表示取余操作;μ为Zadoff-Chu序列的根索引,
Figure PCTCN2020088975-appb-000107
Figure PCTCN2020088975-appb-000108
为小区标识;θ f为循环移位,
Figure PCTCN2020088975-appb-000109
n f是无线帧号;b q(m)和b′ q(m)为二进制序列,m和q为生成二进制序列的参数,m=n mod 128,
Figure PCTCN2020088975-appb-000110
表示对
Figure PCTCN2020088975-appb-000111
向下取整操作,b q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000112
)和b′ q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000113
)中的至少一个取值不相等,也就是说,当m=n mod 128,
Figure PCTCN2020088975-appb-000114
时,b q(m)和b′ q(m)不完全相同或者完全不同。
在本申请实施例中,相比于legacy NSSS序列而言,上述公式(10)和(16)中的non-legacy NSSS中改变了legacy NSSS的二进制扰码序列,使得b′ q(m)和b q(m)部分不同,或者完全不同。
例如,b′ q(m)=-b q(m),或者,重新设计一个b′ q(m)序列,具体可以参见下表4所示:
表4
b′ 0(m)可以为:
Figure PCTCN2020088975-appb-000115
b 1′(m)可以为(假设序列a=[1 -1 -1 1]或者[1 -1 1 -1]):
Figure PCTCN2020088975-appb-000116
b′ 2(m)可以为:
Figure PCTCN2020088975-appb-000117
b′ 3(m)可以为:
Figure PCTCN2020088975-appb-000118
当然,在实际应用中,上述non-legacy NPSS序列和non-legacy NSSS序列还可以为其他序列,本申请实施例不做具体限定。
S402:网络设备在第一频域资源上发送第一同步信号,以及在第二频域资源上发送第二同步信号;
这里,上述S401和S402可以为:首先,网络设备选择中心频率F DL1和F DL2,F DL2需要满足:F DL2=F DL1+k×180kHz,k为非零整数,并分别在以F DL1和F DL2为中心的频域资源 (也就是PRB n和PRB m)上发送同步信号。例如,网络设备在PRB n上发送legacy NPSS和legacy NSSS,并在PRB m上发送non-legacy NPSS和/或non-legacy NSSS,当然,网络设备也可以分别在PRB n和PRB m上发送legacy NPSS和/或legacy NSSS,当然,还可以有其他情况,本申请实施例不做具体限定。
在一些可能的实施方式中,在S402之前,第一同步信号和第二同步信号需要分别映射在无线资源上。例如,网络设备按照先频域后时域的顺序对同步信号进行映射。具体来说,网络设备将第一同步信号中的legacy NPSS,如NPSS序列d l(n),先在频域上映射至PRB n的子载波0至子载波10,然后在时域上按照n增加的顺序映射至每个无线帧的子帧5的符号3至符号13。相应地,网络设备将第一同步信号中的legacy NSSS,如NSSS序列d(n),先在频域上映射至PRB n的子载波0至子载波11,然后在时域上映射至偶数无线帧的子帧9的符号3至符号13(对于频分双工(frequency division duplexing,FDD)NB-IoT系统来说),或者在时域上映射至偶数无线帧的子帧0的符号3到符号13上(对于时分双工(time division duplexing,TDD)NB-IoT系统来说)。类似的,网络设备将第二同步信号中的legacy NPSS和/或non-legacy NPSS,例如NPSS序列d′ l(n),先在频域上映射至PRB m的子载波0至子载波10,然后在时域上按照n增加的顺序映射至每个无线帧的子帧5的符号3至符号13。相应地,网络设备将第二同步信号中的legacy NSSS和/或non-legacy NSSS,例如NSSS序列d′(n),先在频域上映射至PRB m的子载波0至子载波11,然后在时域上映射至偶数无线帧的子帧9的符号3至符号13(对于FDD NB-IoT系统来说),或者在时域上映射至偶数无线帧的子帧0的符号3到符号13上(对于TDD NB-IoT系统来说)。
在实际应用中,网络设备在时域上映射第二同步信号时,还可以将第二同步信号映射在无线帧中除了一些特定的子帧之外的子帧上。具体来说,网络设备将第二同步信号中的legacy NPSS和/或non-legacy NPSS映射至无线帧的第一子帧的符号3至符号13上,其中,第一子帧可以为无线帧中除用于发送第一同步信号(包括legacy NPSS和/或legacy NSSS)的子帧、用于发送第二同步信号中的legacy NSSS和/或non-legacy NSSS的子帧、用于发送NPBCH的子帧以及用于发送系统信息块1(system information blocks type 1,SIB1)的子帧之外的其他子帧,例如子帧6等。网络设备将第二同步信号中的legacy NSSS和/或non-legacy NSSS映射至偶数无线帧的第二子帧的符号3至符号13上,其中,第二子帧可以为无线帧中除用于发送第一同步信号(包括legacy NPSS和/或legacy NSSS)的子帧、用于发送第二同步信号中的legacy NPSS和/或non-legacy NPSS的子帧、用于发送NPBCH的子帧以及用于发送SIB1的子帧之外的其他子帧,例如子帧8。这里,网络设备在映射第二同步信号中的NPSS和NSSS时,分别将两者映射至不同的子帧。例如,网络设备将non-legacy NPSS序列d′ l(n)映射到每个无线帧的子帧6的子载波0到10上,将non-legacy NSSS序列d′(n)映射至偶数无线帧的子帧8的子载波0到11上。
具体可以包括,第一子帧为子帧6,第二子帧为子帧8;或者第一子帧为子帧6,第二子帧为子帧1;或者第一子帧为子帧4,第二子帧为子帧8。
在一些可能的实施方式中,网络设备在时域上映射第一同步信号时,还可以将第一同步信号中的legacy NPSS,如NPSS序列d l(n),映射至每个无线帧的子帧5的符号3至符号13,并从该子帧5的符号3至符号13中任意选取3个连续的符号或者不连续的3个符 号,再将这3个符号上映射的信号序列复制至该子帧5的符号0至符号2上,使得子帧5的14个符号上均映射有信号序列,以此来增加发送同步信号的资源,进而提高同步信号覆盖。例如,网络设备将NPSS序列d l(n)映射至子帧5的符号3至符号13,并从符号3至符号13中选择连续的符号4至符号6,或者符号11至13,或者选择不连续的符号3,5,6,或者符号9,10,13,复制这3个符号上映射的信号序列至子帧5的符号0至符号2,这样,子帧5上的符号0至符号13上均映射有信号序列,且符号0至符号2上的信号序列与选择的3个符号上的序列相同。或者,legacy NPSS序列d l(n)中,l还可以取0,1,2,S(0)=1,S(1)=-1,S(2)=-1,
Figure PCTCN2020088975-appb-000119
分别映射到符号l(如l=0,1,2)上。当然,第一同步信号中的legacy NSSS、第二同步信号中的NPSS和/或第二同步信号中的NSSS也可以采用上述方法进行时频的映射,以此来增加发送同步信号的资源,进而提高同步信号覆盖。
S403:终端确定第一频域资源和第二频域资源;
这里,终端按照协议规定,首先选择满足上述公式(1)和上述M DL的取值的F DL1,根据F DL2需要满足:F DL2=F DL1+k×180kHz这一条件,确定F DL2。其中,F DL2与F DL1的关系是协议预先定义的,例如F DL2=F DL1+180kHz。此时,终端认为在以F DL1和F DL2为中心的频域资源,如以F DL1为中心的PRB n和以F DL2为中心的PRB m上可以检测到同步信号。
S404:终端在第一频域资源上接收第一同步信号,以及在第二频域资源上接收第二同步信号。
这里,终端在确定出F DL1和F DL2为中心的频域资源上对同步信号进行盲搜,以在PRB n上接收第一同步信号和PRB m上接收第二同步信号。
进一步地,终端可以从PRB n中接收第一同步信号后,在PRB m上接收第二同步信号。
在本申请其他实施例中,当第二频域资源包括多个PRB(记为PRB m1,PRB m2……)时,上述non-legacy NPSS和/或non-legacy NSSS可以直接重复扩展至多个PRB上。具体来说,PRB m1上的non-legacy NPSS可以为公式(4),non-legacy NSSS可以为公式(10);PRB m2上的non-legacy NPSS可以为公式(4),non-legacy NSSS可以为公式(10),以此类推可以获得多个PRB资源上的第二同步信号。采用其它的non-legacy NPSS和/或non-legacy NSSS序列进行重复扩展也是类似的,在此不再赘述。
类似地,当第二频域资源包括多个PRB资源(记为PRB m1,PRB m2……)时,每个PRB上的non-legacy NPSS和/或non-legacy NSSS还可以不完全相同,也可以完全不同。例如,PRB m1上的non-legacy NPSS可以为公式(4),non-legacy NSSS可以为公式(10);PRB m2上的non-legacy NPSS可以为公式(4),non-legacy NSSS可以为公式(11)。同时,还可以考虑和legacy NPSS,legacy NSSS的不同组合,例如PRB m1上为legacy NPSS和non-legacy NSSS,non-legacy NSSS可以为公式(10);PRB m2为legacy NPSS和non-legacy NSSS,non-legacy NSSS可以为公式(11)。
当然,第二同步信号可以以其他方式在多个PRB上进行扩展,本申请实施例不做具体限定。
在本申请实施例中,通过增加第二频域资源来发送第二同步信号,由此来提高同 步信号的覆盖,使得终端可以从第一频域资源和第二频域资源上盲搜同步信号,大大增加了终端接收到同步信号的概率,进而提高了终端接入网络的成功率,减少终端接入网络的时延,优化终端的功耗。
在一些可能的实施方式中,还可以通过仅仅增加时域资源来增加同步信号的覆盖。例如,在PRB n上增加子帧来发送同步信号,此时,新增的子帧可以为无线帧上除了用于发送legacy NPSS和/或legacy NSSS的子帧、用于发送NPBCH的子帧以及用于发送SIB1子帧之外的其他子帧,例如,网络设备将non-legacy NPSS序列d′ l(n)映射到每个无线帧的子帧6上,将non-legacy NSSS序列d′(n)映射至偶数无线帧的子帧8上。
基于与上述方法相同的发明构思,本申请实施例提供一种通信装置,该通信装置可以为同步信号传输装置或者同步信号传输装置中的芯片或者片上系统,还可以为同步信号传输装置中用于实现第一方面或第一方面的任一可能的实施方式所述的方法的功能模块。该通信装置可以实现上述各方面或者各可能的实施方式中终端所执行的功能,所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说,图6为本申请实施例中的通信装置的结构示意图一,参见图6所示,该通信装置600,可以包括:处理模块601,用于确定第一频域资源和第二频域资源,第一频域资源用于第一同步信号的传输,第二频域资源用于第二同步信号的传输,其中,第二频域资源包括至少一个物理资源块PRB,至少一个PRB中的每一个PRB的中心频率F DL2均满足:F DL2=F DL1+k×180kHz;其中,F DL1为第一频域资源的中心频率,k为非零整数;通信模块602,用于在第一频域资源上接收第一同步信号以及在第二频域资源上接收第二同步信号。
在一些可能的实施方式下,第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;第二同步信号包括第一NPSS和/或第一NSSS;其中,
第一NPSS序列d l(n)满足:
Figure PCTCN2020088975-appb-000120
其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13。当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
第一NSSS序列d(n)满足:
Figure PCTCN2020088975-appb-000121
其中,n=0,1,…,131,n′=n mod 131,
Figure PCTCN2020088975-appb-000122
为小区标识;
Figure PCTCN2020088975-appb-000123
n f是无线帧号;b q(m)为二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000124
在一些可能的实施方式下,第一同步信号包括第一NPSS和/或第一NSSS;第二同步信号包括第二NPSS和/或第二NSSS,第一NPSS与第二NPSS不同,第一NSSS与第二NSSS不同。
在一些可能的实施方式下,第二NPSS序列d′ l(n)满足:
Figure PCTCN2020088975-appb-000125
或者,
Figure PCTCN2020088975-appb-000126
或者,
Figure PCTCN2020088975-appb-000127
其中,S(l)为第一NPSS序列d l(n)中的覆盖码序列,S′(l)为第二NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
在一些可能的实施方式下,第二NSSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000128
或者,
Figure PCTCN2020088975-appb-000129
或者,
Figure PCTCN2020088975-appb-000130
其中,n=0,1,……,131;n′=n mod 131;
Figure PCTCN2020088975-appb-000131
为小区标识;
Figure PCTCN2020088975-appb-000132
Figure PCTCN2020088975-appb-000133
n f是无线帧号;b q(m)为第一NSSS序列d(n)中的二进制序列,b′ q(m)为第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000134
b q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000135
)和b′ q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000136
)中的至少一个取值不相等。
在一些可能的实施方式下,第二频域资源包括至少两个PRB,至少两个PRB中的任意两个PRB的中心频率不同。
还需要说明的是,通信模块601和处理模块902的具体实现过程可参考图4至图5实施例的详细描述,为了说明书的简洁,这里不再赘述。
本申请实施例中提到的通信模块可以为收发接口、收发电路或者收发器等;处理模块可以为一个或多个处理器。
基于与上述方法相同的发明构思,本申请实施例提供一种通信装置,该通信装置可以为同步信号传输装置或者同步信号传输装置中的芯片或者片上系统,还可以为同步信号传输装置中用于实现第二方面或第二方面的任一可能的实施方式所述的方法的功能模块。该通信装置可以实现上述各方面或者各可能的实施方式中网络设备所执行的功能,所述功能可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个上述功能相应的模块。举例来说,图7为本申请实施例中的通信装置的结构示意图二,参见图7所示,该通信装置700,可以包括:处理模块701,用于确定第一频域资源和第二频域资源,第一频域资源用于第一同步信号的传输,第二频域资源用于第二同步信号的传输,其中,第二频域资源包括至少一个物理资源块PRB,所述至少一个PRB中的每一个PRB的中心频率F DL2均满足:F DL2=F DL1+k×180kHz;其中,F DL1为第一频域资源的中心频率,k为非零整数;通信模块702,用于在第一频域资源上发送第一同步信号,以及在第二频域资源上发送第二同步信号。
在一些可能的实施方式下,第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;第二同步信号包括第一NPSS和/或第一NSSS;
第一NPSS序列d l(n)满足:
Figure PCTCN2020088975-appb-000137
其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13。当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
第一NSSS序列d(n)满足:
Figure PCTCN2020088975-appb-000138
其中,n=0,1,…,131,n′=n mod 131,
Figure PCTCN2020088975-appb-000139
为小区标识;
Figure PCTCN2020088975-appb-000140
n f是无线帧号;b q(m)为二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000141
在一些可能的实施方式下,第一同步信号包括第一NPSS和/或第一NSSS;第二同步信号包括第二NPSS和/或第二NSSS,第一NPSS与第二NPSS不同,第一NSSS与第二NSSS不同。
在一些可能的实施方式下,第二NPSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000142
或者,
Figure PCTCN2020088975-appb-000143
或者,
Figure PCTCN2020088975-appb-000144
其中,S(l)为第一NPSS序列d l(n)中的覆盖码序列,S′(l)为第二NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
在一些可能的实施方式下,第二NSSS序列d′(n)满足:
Figure PCTCN2020088975-appb-000145
或者,
Figure PCTCN2020088975-appb-000146
或者,
Figure PCTCN2020088975-appb-000147
其中,n=0,1,……,131;n′=n mod 131;
Figure PCTCN2020088975-appb-000148
为小区标识;
Figure PCTCN2020088975-appb-000149
Figure PCTCN2020088975-appb-000150
n f是无线帧号;b q(m)为第一NSSS序列d(n)中的二进制序列,b′ q(m)为第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
Figure PCTCN2020088975-appb-000151
b q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000152
)和b′ q(m)(m=n mod 128,
Figure PCTCN2020088975-appb-000153
)中的至少一个取值不相等。
在一些可能的实施方式下,第二频域资源包括至少两个PRB,至少两个PRB中的任意两个PRB的中心频率不同。
还需要说明的是,处理模块701和通信模块702的具体实现过程可参考图4至图5实施例的详细描述,为了说明书的简洁,这里不再赘述。
本申请实施例中提到的通信模块可以为收发接口、收发电路或者收发器等;处理模块 可以为一个或多个处理器。
基于与上述方法相同的发明构思,本申请实施例提供一种通信装置,该通信装置可以为终端中的芯片或者芯片上系统。该通信装置可以实现上述各方面或者各可能的实施方式中终端所执行的功能,所述功能可以通过硬件实现,如:一种可能的实施方式中,图8为本申请实施例中的通信装置的结构示意图三,参见图8中实线所示,该通信装置800,包括处理器801,处理器801用于与存储器耦合,读取并执行存储器中的指令,以实现如上述实施例中的任一终端侧基于NB-IoT的同步信号传输方法的步骤。
在一些可能的实施方式下,参见图8中虚线所示,上述通信装置还包括存储器802,存储器用于保存通信装置必要的计算机执行指令和数据。当该通信装置运行时,该处理器执行该存储器存储的该计算机执行指令,以使该通信装置执行如上述实施例中的任一终端侧基于NB-IoT的同步信号传输方法的步骤。
基于与上述方法相同的发明构思,本申请实施例提供一种通信装置,该通信装置可以为网络设备中的芯片或者芯片上系统。该通信装置可以实现上述各方面或者各可能的实施方式中网络设备侧所执行的功能,所述功能可以通过硬件实现,如:一种可能的实施方式中,图9为本申请实施例中的通信装置的结构示意图四,参见图9中实线所示,该通信装置900包括处理器901,处理器901用于与存储器耦合,读取并执行存储器中的指令,以实现如上述实施例中任一网络设备侧基于NB-IoT的同步信号传输方法的步骤。
在一些可能的实施方式下,参见图9中虚线所示,上述通信装置还包括存储器902,存储器用于保存通信装置必要的计算机执行指令和数据。当该通信装置运行时,该处理器执行该存储器存储的该计算机执行指令,以使该通信装置执行如上述实施例中的任一网络设备侧基于NB-IoT的同步信号传输方法的步骤。
基于与上述方法相同的发明构思,本申请实施例提供一种计算机可读存储介质,计算机可读存储介质存储有指令,当指令计算机上运行时,用于执行上述实施例中的任一基于NB-IoT的同步信号传输方法的步骤。
基于与上述方法相同的发明构思,本申请实施例提供一种计算机程序或计算机程序产品,当计算机程序或计算机程序产品在计算机上被执行时,使得计算机实现上述实施例中的任一基于NB-IoT的同步信号传输方法的步骤。
本领域技术人员能够领会,结合本文公开描述的各种说明性逻辑框、模块和算法步骤所描述的功能可以硬件、软件、固件或其任何组合来实施。如果以软件来实施,那么各种说明性逻辑框、模块、和步骤描述的功能可作为一或多个指令或代码在计算机可读媒体上存储或传输,且由基于硬件的处理单元执行。计算机可读媒体可包含计算机可读存储媒体,其对应于有形媒体,例如数据存储媒体,或包括任何促进将计算机程序从一处传送到另一处的媒体(例如,根据通信协议)的通信媒体。以此方式,计算机可读媒体大体上可对应于(1)非暂时性的有形计算机可读存储媒体,或(2)通信媒体,例如信号或载波。数据存储媒体可为可由一或多个计算机或一或多个处理器存取以检索用于实施本申请中描述的技术的指令、代码和/或数据结构的任何可用媒体。计算机程序产品可包含计算机可读媒体。
作为实例而非限制,此类计算机可读存储媒体可包括RAM、ROM、EEPROM、CD-ROM或其它光盘存储装置、磁盘存储装置或其它磁性存储装置、快闪存储器或可用来存储指令 或数据结构的形式的所要程序代码并且可由计算机存取的任何其它媒体。并且,任何连接被恰当地称作计算机可读媒体。举例来说,如果使用同轴缆线、光纤缆线、双绞线、数字订户线(DSL)或例如红外线、无线电和微波等无线技术从网站、服务器或其它远程源传输指令,那么同轴缆线、光纤缆线、双绞线、DSL或例如红外线、无线电和微波等无线技术包含在媒体的定义中。但是,应理解,所述计算机可读存储媒体和数据存储媒体并不包括连接、载波、信号或其它暂时媒体,而是实际上针对于非暂时性有形存储媒体。如本文中所使用,磁盘和光盘包含压缩光盘(CD)、激光光盘、光学光盘、数字多功能光盘(DVD)和蓝光光盘,其中磁盘通常以磁性方式再现数据,而光盘利用激光以光学方式再现数据。以上各项的组合也应包含在计算机可读媒体的范围内。
可通过例如一或多个数字信号处理器(DSP)、通用微处理器、专用集成电路(ASIC)、现场可编程逻辑阵列(FPGA)或其它等效集成或离散逻辑电路等一或多个处理器来执行指令。因此,如本文中所使用的术语“处理器”可指前述结构或适合于实施本文中所描述的技术的任一其它结构中的任一者。另外,在一些方面中,本文中所描述的各种说明性逻辑框、模块、和步骤所描述的功能可以提供于经配置以用于编码和解码的专用硬件和/或软件模块内,或者并入在组合编解码器中。而且,所述技术可完全实施于一或多个电路或逻辑元件中。
本申请的技术可在各种各样的装置或设备中实施,包含无线手持机、集成电路(IC)或一组IC(例如,芯片组)。本申请中描述各种组件、模块或单元是为了强调用于执行所揭示的技术的装置的功能方面,但未必需要由不同硬件单元实现。实际上,如上文所描述,各种单元可结合合适的软件和/或固件组合在编码解码器硬件单元中,或者通过互操作硬件单元(包含如上文所描述的一或多个处理器)来提供。
在上述实施例中,对各个实施例的描述各有侧重,某个实施例中没有详述的部分,可以参见其他实施例的相关描述。
以上所述,仅为本申请示例性的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应该以权利要求的保护范围为准。

Claims (18)

  1. 一种基于窄带物联网的同步信号传输方法,其特征在于,所述方法包括:
    通信装置确定第一频域资源和第二频域资源,所述第一频域资源用于第一同步信号的传输,所述第二频域资源用于第二同步信号的传输,其中,所述第二频域资源包括至少一个物理资源块PRB,所述至少一个PRB中的每一个PRB的中心频率F DL2均满足:
    F DL2=F DL1+k×180kHz,
    其中,F DL1为所述第一频域资源的中心频率,k为非零整数;
    所述通信装置在所述第一频域资源上接收所述第一同步信号,以及在所述第二频域资源上接收所述第二同步信号。
  2. 根据权利要求1所述的方法,其特征在于,所述第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;且所述第二同步信号包括所述第一NPSS和/或所述第一NSSS;其中,
    所述第一NPSS序列d l(n)满足:
    Figure PCTCN2020088975-appb-100001
    其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
    所述第一NSSS序列d(n)满足:
    Figure PCTCN2020088975-appb-100002
    其中,n=0,1,…,131,n′=n mod 131,mod表示取余操作,
    Figure PCTCN2020088975-appb-100003
    Figure PCTCN2020088975-appb-100004
    为小区标识,
    Figure PCTCN2020088975-appb-100005
    n f是无线帧号,b q(m)为二进制序列,m=n mod 128,
    Figure PCTCN2020088975-appb-100006
    表示对
    Figure PCTCN2020088975-appb-100007
    向下取整操作。
  3. 根据权利要求1或2所述的方法,其特征在于,所述第一同步信号包括第一NPSS和/或第一NSSS;且所述第二同步信号包括第二NPSS和/或第二NSSS,所述第一NPSS与所述第二NPSS不同,所述第一NSSS与所述第二NSSS不同。
  4. 根据权利要求3所述的方法,其特征在于,所述第二NPSS序列d′ l(n)满足:
    Figure PCTCN2020088975-appb-100008
    或者,
    Figure PCTCN2020088975-appb-100009
    或者,
    Figure PCTCN2020088975-appb-100010
    其中,S(l)为第一NPSS序列d l(n)的覆盖码序列,S′(l)为所述第二NPSS序列d′ l(n)的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
  5. 根据权利要求3或4所述的方法,其特征在于,所述第二NSSS序列d′(n)满足:
    Figure PCTCN2020088975-appb-100011
    或者,
    Figure PCTCN2020088975-appb-100012
    或者,
    Figure PCTCN2020088975-appb-100013
    其中,n=0,1,……,131,n′=n mod 131,mod表示取余操作,
    Figure PCTCN2020088975-appb-100014
    Figure PCTCN2020088975-appb-100015
    为小区标识,
    Figure PCTCN2020088975-appb-100016
    n f是无线帧号,b q(m)为所述第一NSSS序列d(n)中的二进制序列,b′ q(m)为所述第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
    Figure PCTCN2020088975-appb-100017
    表示对
    Figure PCTCN2020088975-appb-100018
    向下取整操作,b q(m)(m=n mod 128,
    Figure PCTCN2020088975-appb-100019
    )和b′ q(m)(m=n mod 128,
    Figure PCTCN2020088975-appb-100020
    )中的至少一个取值不相等。
  6. 根据权利要求1至5任一项所述的方法,其特征在于,所述第二频域资源包括至少两个PRB,所述至少两个PRB中的任意两个PRB的中心频率不同。
  7. 一种基于窄带物联网的同步信号传输方法,其特征在于,所述方法包括:
    通信装置确定第一频域资源和第二频域资源,所述第一频域资源用于第一同步信号的传输,所述第二频域资源用于第二同步信号的传输,其中,所述第二频域资源包括至少一个物理资源块PRB,所述至少一个PRB中的每一个PRB的中心频率F DL2均满足:
    F DL2=F DL1+k×180kHz;
    其中,F DL1为所述第一频域资源的中心频率,k为非零整数;
    所述通信装置在所述第一频域资源上发送所述第一同步信号,以及在所述第二频域资源上发送所述第二同步信号。
  8. 根据权利要求7所述的方法,其特征在于,所述第一同步信号包括第一窄带主同步信号NPSS和/或第一窄带辅同步信号NSSS;所述第二同步信号包括所述第一NPSS和/或所述第一NSSS;
    所述第一NPSS序列d l(n)满足:
    Figure PCTCN2020088975-appb-100021
    其中,n=0,1,…,10,μ=5,S(l)为覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13。当l=3,4,5,6,9,10,11,13时S(l)=1,当l=7,8,12时,S(l)=-1;
    所述第一NSSS序列d(n)满足:
    Figure PCTCN2020088975-appb-100022
    其中,n=0,1,…,131,n′=n mod 131,mod表示取余操作,
    Figure PCTCN2020088975-appb-100023
    Figure PCTCN2020088975-appb-100024
    为小区标识;
    Figure PCTCN2020088975-appb-100025
    n f是无线帧号;b q(m)为二进制序列,m=n mod 128,
    Figure PCTCN2020088975-appb-100026
    表示对
    Figure PCTCN2020088975-appb-100027
    向下取整操作。
  9. 根据权利要求7或8所述的方法,其特征在于,所述第一同步信号包括第一NPSS和/或第一NSSS;所述第二同步信号包括第二NPSS和/或第二NSSS,所述第一NPSS与所述第 二NPSS不同,所述第一NSSS与所述第二NSSS不同。
  10. 根据权利要求9所述的方法,其特征在于,所述第二NPSS序列d′(n)满足:
    Figure PCTCN2020088975-appb-100028
    或者,
    Figure PCTCN2020088975-appb-100029
    或者,
    Figure PCTCN2020088975-appb-100030
    其中,S(l)为所述第一NPSS序列d l(n)中的覆盖码序列,S′(l)为所述第二NPSS序列d′ l(n)中的覆盖码序列,l为时域上的符号索引,l=3,4,5,…,13,S′(l)(l=3,4,5,…,13)与S(l)(l=3,4,5,…,13)中的至少一个取值不相等;μ=5,μ′为正整数且μ′≠5;n=0,1,…,10。
  11. 根据权利要求9所述的方法,其特征在于,所述第二NSSS序列d′(n)满足:
    Figure PCTCN2020088975-appb-100031
    或者,
    Figure PCTCN2020088975-appb-100032
    或者,
    Figure PCTCN2020088975-appb-100033
    其中,n=0,1,……,131;n′=n mod 131,mod表示取余操作;
    Figure PCTCN2020088975-appb-100034
    Figure PCTCN2020088975-appb-100035
    为小区标识;
    Figure PCTCN2020088975-appb-100036
    n f是无线帧号;b q(m)为所述第一NSSS序列d(n)中的二进制序列,b′ q(m)为所述第二NSSS序列d′(n)中的二进制序列,m=n mod 128,
    Figure PCTCN2020088975-appb-100037
    表示对
    Figure PCTCN2020088975-appb-100038
    向下取整操作,b q(m)(m=n mod 128,
    Figure PCTCN2020088975-appb-100039
    )和b′ q(m)(m=n mod 128,
    Figure PCTCN2020088975-appb-100040
    )中的至少一个取值不相等。
  12. 根据权利要求7至11任一项所述的方法,其特征在于,所述第二频域资源包括至少两个PRB,所述至少两个PRB中的任意两个PRB的中心频率不同。
  13. 一种通信装置,其特征在于,包括处理器,所述处理器用于与存储器耦合,读取并执行所述存储器中的指令,以实现如权利要求1至6任一项所述的基于窄带物联网的同步信号传输方法。
  14. 根据权利要求13所述的通信装置,其特征在于,所述通信装置还包括所述存储器。
  15. 一种通信装置,其特征在于,包括处理器,所述处理器用于与存储器耦合,读取并执行所述存储器中的指令,以实现如权利要求7至12任一项所述的基于窄带物联网的同步信号传输方法。
  16. 根据权利要求15所述的通信装置,其特征在于,所述通信装置还包括所述存储器。
  17. 一种通信系统,包括用于执行如权利要求1至6任一项所述的基于窄带物联网的同步信号传输方法的通信装置,以及用于执行如权利要求7至12任一项所述的基于窄带物联网的同步信号传输方法的通信装置。
  18. 一种计算机可读存储介质,其特征在于,所述计算机可读存储介质存储有指令,当指令计算机上运行时,用于执行如权利要求1至12任一项所述的基于窄带物联网的同步信号传输方法。
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