WO2019028802A1 - 一种信号发送、接收方法及装置 - Google Patents

一种信号发送、接收方法及装置 Download PDF

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Publication number
WO2019028802A1
WO2019028802A1 PCT/CN2017/096961 CN2017096961W WO2019028802A1 WO 2019028802 A1 WO2019028802 A1 WO 2019028802A1 CN 2017096961 W CN2017096961 W CN 2017096961W WO 2019028802 A1 WO2019028802 A1 WO 2019028802A1
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Prior art keywords
period
carrier
nsss
subframe
frequency interval
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PCT/CN2017/096961
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English (en)
French (fr)
Inventor
陈哲
金哲
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华为技术有限公司
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Priority to CN201780091525.2A priority Critical patent/CN110710243B/zh
Priority to EP17920822.8A priority patent/EP3637818B1/en
Priority to PCT/CN2017/096961 priority patent/WO2019028802A1/zh
Publication of WO2019028802A1 publication Critical patent/WO2019028802A1/zh
Priority to US16/785,093 priority patent/US11330543B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H04W56/0015—Synchronization between nodes one node acting as a reference for the others
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0092—Indication of how the channel is divided
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present application relates to the field of wireless communications technologies, and in particular, to a signal transmitting and receiving method and apparatus.
  • the 3rd Generation Partnership Project (3GPP) of the Mobile Communications Standardization Organization proposes the Narrowband Internet of Things (NB-IOT) technology.
  • the device supporting NB-IoT has a bandwidth of 180 kHz when transmitting data, and supports operation in Standalone operation, Guardband operation, and In-band operation.
  • the in-band mode refers to using one or more resource blocks in one carrier to transmit NB-IoT service data in a Long Term Evolution (LTE) system, where one resource block has a bandwidth of 180 kHz.
  • LTE Long Term Evolution
  • the NB-IOT technology is divided into time division duplex (TDD) NB-IoT and frequency division duplex (FDD) NB-IoT.
  • TDD time division duplex
  • FDD frequency division duplex
  • the base station needs to broadcast a synchronization signal to notify the terminal device of some synchronization information, wherein the synchronization signal includes a Narrowband Primary Synchronization Signal (NPSS), a Narrowband Sencondary Synchronization Signal (NSSS), and a narrowband.
  • NPSS Narrowband Primary Synchronization Signal
  • NSSS Narrowband Sencondary Synchronization Signal
  • NNBCH Narrowband Physical Broadcast Channel
  • NarrowBand, SIB1-NB System Information Block 1
  • the TDD NB-IoT needs to broadcast the synchronization signal through the radio frame defined in the TDD LTE system.
  • the downlink resources required for the synchronization signal in the TDD NB-IoT are compared with the downlink resources included in the radio frame in the TDD LTE system.
  • the compatibility is poor, which makes it impossible to guarantee that NPSS, NSSS, NPBCH, and SIB1-NB are transmitted according to a fixed period.
  • the NB-IoT technology is based on the LTE system, so the TDD NB-IoT must implement a compatible TDD LTE system. Therefore, how to transmit the synchronization signal under the TDD NB-IoT is an urgent problem to be solved.
  • the purpose of the embodiments of the present application is to provide a signal transmitting and receiving method and apparatus for implementing a TDD NB-IOT technology to transmit and receive a synchronization signal according to a fixed period.
  • an embodiment of the present application provides a signaling method, including:
  • the narrowband secondary synchronization signal NPSS sent by the terminal device according to the first period in the first carrier, and the narrowband secondary synchronization signal NSSS transmitted according to the second period in the first carrier; wherein the subframe of the subframe occupied by the NPSS in each period
  • the number is M, the subframe number of the subframe occupied by the NSSS in each period is N; M is 5, N is 0, or M is 0, and N is 5;
  • the subframe number of the subframe is P, the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0, and Q is 5;
  • the terminal device obtains downlink synchronization and system messages according to the NPSS, the NSSS, the NPBCH, and the SIB1-NB.
  • the NPSS and the NSSS received by the terminal are located on the first carrier, and the NPBCH and the SIB1-NB are located on the second carrier, compared with the NPSS, NSSS, NPBCH, and SIB1-NB transmitted by the same carrier in the FDD NB-IoT.
  • the time interval between the NPSS and the NSSS in the embodiment of the present application is different from the time interval between the NPSS and the NSSS in the FDD NB-IoT. Therefore, the terminal can distinguish the current cell according to the time interval between the received NPSS and the NSSS.
  • the TDD NB-IoT cell is also an FDD NB-IoT cell, and thus can accurately receive the NPBCH and the SIB1-NB in the second carrier.
  • the terminal device can receive the synchronization signal sent by the network device in the embodiment of the present application and the synchronization signal in the FDD NB-IoT by using only one set of receivers, thereby reducing the cost of the terminal device.
  • a frequency interval between the first carrier and the second carrier is a preset frequency interval.
  • the Hadamard sequence set used by the NSSS includes four Hadamard sequences, and the four Hadamard sequences are mapped with one frequency interval;
  • the frequency interval between the first carrier and the second carrier is a frequency interval mapped with four Hadamard sequences in the Hadamard sequence set used by the NSSS.
  • the four Hadamard sequences in the Hadamard sequence set used by the NSSS do not require additional indication information, so that the frequency interval between the first carrier and the second carrier can be simply and efficiently indicated.
  • an embodiment of the present application provides a terminal device, where the terminal device includes a memory, a transceiver, and a processor, where: the memory is used to store an instruction; the processor is configured to perform, according to an instruction for executing the memory, and control the transceiver. Signal reception and signal transmission, when the processor executes an instruction stored in the memory, the terminal device is configured to perform the method in any of the possible aspects of the first aspect or the first aspect described above.
  • the embodiment of the present application provides a terminal device, which is used to implement any one of the foregoing first aspect or the first aspect, including a corresponding functional module, for example, including a processing unit, a transceiver unit, a processing unit, and the like. Used to implement the steps in the above methods.
  • an embodiment of the present application provides a computer readable storage medium, where the computer storage medium stores computer readable instructions, and when the computer reads and executes the computer readable instructions, causes the computer to execute the first Aspect or method of any of the possible aspects of the first aspect.
  • the embodiment of the present application provides a computer program product, when the computer reads and executes the computer program product, causing the computer to perform the method in any one of the foregoing first aspect or the first aspect.
  • an embodiment of the present application provides a chip, where the chip is connected to a memory, for reading and executing a software program stored in the memory, to implement any of the foregoing first aspect or the first aspect.
  • the method in the design is not limited to:
  • the embodiment of the present application provides a signal receiving method, including:
  • the network device generates a narrowband primary synchronization signal NPSS and a narrowband secondary synchronization signal NSSS, and sends the NPSS according to a first period in a first carrier, and sends the NSSS according to a second period; wherein the NPSS is occupied in each cycle
  • the subframe number of the subframe is M, the subframe number of the subframe occupied by the NSSS in each period is N; M is 5, N is 0, or M is 0, and N is 5;
  • the network device generates a narrowband physical broadcast channel NPBCH, a narrowband system information block 1SIB1-NB, and transmits the NPBCH according to a third period in a second carrier, and sends the SIB1-NB according to a fourth period; wherein the NPBCH
  • the subframe number of the subframe occupied in each period is P, and the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0. Q is 5.
  • the network device can simultaneously send the NPSS, the NSSS, and the second carrier through the first carrier and the second carrier.
  • NPBCH, SIB1-NB and since the subframe number of the subframe occupied by the NPSS and the NSSS in each cycle is 5 or 0 in the first carrier, in the second carrier, the NPBCH and the SIB1-NB are in each cycle.
  • the subframe number of the occupied subframe is 5 or 0. Therefore, NPSS, NSSS, NPBCH, and SIB1-NB can be simultaneously transmitted in the radio frame configured in any of the TDD LTE systems, so that TDD NB-IoT and The TDD LTE system is compatible with each other to the greatest extent.
  • the terminal device can use a set of receivers to access the synchronization signals in the FDD NB-IoT and TDD NB-IoT, thereby reducing the cost of the terminal equipment and thereby improving system efficiency.
  • a frequency interval between the first carrier and the second carrier is a preset frequency interval.
  • the Hadamard sequence set used by the NSSS includes four Hadamard sequences, and the four Hadamard sequences are mapped with one frequency interval;
  • the frequency interval between the first carrier and the second carrier is a frequency interval mapped with four Hadamard sequences in the Hadamard sequence set used by the NSSS.
  • an embodiment of the present application provides a network device, where the network device includes a memory, a transceiver, and a processor, where: the memory is used to store an instruction; the processor is configured to perform, according to an instruction to execute the memory storage, and control the transceiver. Signal reception and signal transmission, when the processor executes an instruction stored in the memory, the network device is operative to perform the method in any of the possible aspects of the seventh aspect or the seventh aspect described above.
  • the ninth aspect the embodiment of the present application provides a network device, which is used to implement any one of the foregoing seventh or seventh aspects, including a corresponding functional module, for example, including a processing unit, a transceiver unit, a processing unit, and the like. Used to implement the steps in the above methods.
  • the embodiment of the present application provides a computer readable storage medium, where the computer readable medium stores computer readable instructions, and when the computer reads and executes the computer readable instructions, causes the computer to execute the seventh Aspect or method of any of the possible aspects of the seventh aspect.
  • the embodiment of the present application provides a computer program product, when the computer reads and executes the computer program product, causing the computer to perform the method in any one of the seventh aspect or the seventh aspect. .
  • the embodiment of the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, to implement any one of the seventh aspect or the seventh aspect. Possible methods in design.
  • FIG. 1 is a schematic diagram showing a system architecture applicable to an embodiment of the present application
  • FIG. 2 is a schematic diagram of a bandwidth provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a bandwidth provided by an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a signal sending method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a synchronization signal transmission according to an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • NR New Radio
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • eLTE Evolved Long Term Evolution
  • FIG. 1 is a schematic diagram showing a system architecture applicable to the embodiment of the present application.
  • the network device and the terminal device 1 to the terminal device 6 form a communication system, in which the network device sends The information is sent to one or more of the terminal devices 1 to 6 .
  • the terminal device 4 to the terminal device 6 also constitute a communication system in which the terminal device 5 can transmit information to one or more of the terminal device 4 and the terminal device 6.
  • the terminal device may communicate with the core network via the network device, where the terminal device may be a user equipment (User Equipment, UE), an access terminal device, a subscriber unit, a subscriber station, a mobile station, a mobile station, or a remote station. , a remote terminal device, a mobile device, a user terminal device, a terminal device, a wireless communication device, a user agent, or a user device.
  • the access terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), and a wireless device.
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • a network device which may be referred to as a radio access network (RAN) device, is hereinafter collectively referred to as a network device, and is mainly responsible for providing a wireless connection for the terminal device and ensuring reliable transmission of uplink and downlink data of the terminal device.
  • the network device can be a gNB (generation Node B) in a 5G system, and can be a Global System of Mobile communication (GSM) system or a base station in Code Division Multiple Access (CDMA) (Base Transceiver Station).
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • BTS may also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or may be an evolved base station in a Long Term Evolution (LTE) system ( Evolutional Node B, eNB or eNodeB), etc.
  • NodeB Node B
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long Term Evolution
  • the device (network device or terminal device) in the NB-IoT can work in any one of an independent mode, a guard band mode, and an in-band mode.
  • the network device works in any of the above modes, it can send a synchronization signal to the terminal device.
  • the device in the NB-IoT operates in the independent mode, one or more carriers in the GSM network can be used to transmit the NB-IoT service data, and the bandwidth of the independent carrier is 180 kHz.
  • one or more resource blocks in one carrier in the LTE system can be used to transmit the NB-IoT service data, wherein the bandwidth of one resource block is 180 kHz.
  • the bandwidth of one resource block is 180 kHz.
  • an LTE carrier may be divided into multiple resource blocks, each of which has a bandwidth of 180 kHz, and the device in the NB-IoT may use one or more resource blocks to transmit the NB-IoT service data.
  • the NB-IoT service data can be transmitted by using the carrier protection band in the LTE system, wherein the bandwidth of the guard band is 180 kHz. Specifically, it can be as shown in FIG. 3.
  • the terminal device in the NB-IoT can transmit the NB-IoT service data using the protection bandwidth of the LTE carrier.
  • FIG. 4 it is a schematic flowchart of a signal sending method provided by an embodiment of the present application.
  • the method includes:
  • Step 401 The network device generates the NPSS and the NSSS, and sends the NPSS according to the first period in the first carrier, and sends the NSSS according to the second period.
  • the frame number is M
  • the subframe number of the subframe occupied by the NSSS in each period is N
  • M is 5, N is 0, or M is 0, and N is 5;
  • Step 402 The network device generates the NPBCH and the SIB1-NB, and sends the NPBCH according to the third period in the second carrier, and sends the SIB1-NB according to the fourth period.
  • the NPBCH is occupied in each period.
  • the subframe number of the subframe is P, and the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0, and Q is 5.
  • steps 401 and 402 are not limited, and steps 401 and 402 may be performed simultaneously or in any order.
  • Step 403 The terminal device receives, in the first carrier, the NPSS sent by the network device according to the first period, and the NSSS sent according to the second period.
  • the terminal device receives, on the second carrier, the NPBCH sent by the network device according to the third period, according to the second carrier. SIB1-NB sent in the fourth cycle;
  • the terminal device receives the NPSS and the NSSS in the first carrier, and the sequence of receiving the NPBCH and the SIB1-NB in the second carrier is not limited, and the terminal device can simultaneously be in the first carrier. Receiving the above signals in the second carrier may also receive the signals in the first carrier and the second carrier in any order.
  • the bandwidths of the first carrier and the second carrier are both 180 kHz.
  • Step 404 The terminal device obtains downlink synchronization and system messages according to the NPSS, the NSSS, the NPBCH, and the SIB1-NB.
  • the NPSS indication information may include: a physical-layer identification in a physical cell group in the network device, and a 5 ms timing of the physical cell;
  • the NSSS indication information may include: a physical cell group identifier in the network device (Physical) -layer cell-Identification group), cyclic prefix configuration (normal cyclic prefix or extended cyclic prefix), system frame timing (that is, the location of subframe 0 in the system frame).
  • the NPSS and the NSSS may also indicate other information, and details are not described herein again.
  • the first period of sending the NPSS may be the length of time of one radio frame, that is, 10 ms, and only NPSS is sent once in each first period.
  • the NPSS may be transmitted in a subframe with a subframe number of 0 or 5 for each radio frame, and occupy the last 11 orthogonal frequency division multiplexing (OFDM) symbols of the subframe.
  • OFDM orthogonal frequency division multiplexing
  • the second period of sending the NSSS may be the length of time of two radio frames, that is, 20 ms, and in each second period, only the NSSS is sent once.
  • the NPSS may be transmitted in a subframe of subframe number 0 or 5 of each radio frame and occupy the last 11 OFDM symbols of the subframe.
  • the SFN of the radio frame that sends the NSSS may be an even number in each second period.
  • the NPSS and the NSSS cannot occupy one subframe at the same time and need to be sent in two subframes respectively. Therefore, if the NPSS and the NSSS are transmitted in the same radio frame, the subframe number of the subframe occupied by the NPSS is 5. The subframe number of the subframe occupied by the NSSS is 0. Correspondingly, when the subframe number of the subframe occupied by the NPSS is 0, the subframe number of the subframe occupied by the NSSS is 5.
  • the NPBCH indication information may include: a downlink system bandwidth, a system frame number (system frame) Number, SFN), antenna configuration information, etc.; SIB1-NB indication information may include: cell global identity, cell barring state, cell selection parameter, system information (SI) transmission period, and the like.
  • NPBCH and the SIB1-NB may also indicate other information, and details are not described herein again.
  • the third period of sending the NPBCH may be the length of time of one radio frame, that is, 10 ms, and in each third period, only the NPBCH is sent once.
  • the NPBCH may be transmitted in a subframe of subframe number 0 or 5 of each radio frame and occupy the last 11 OFDM symbols of the subframe.
  • the fourth period of sending the SIB1-NB may be 2560 ms, and in each fourth period, the SIB1-NB is sent N times in consecutive 2N radio frames, and the SIB1-NB is sent once every 2 radio frames.
  • N is a positive integer greater than zero.
  • the SIB1-NB may be transmitted in a subframe of subframe number 0 or 5 of each radio frame and occupy all OFDM symbols of the subframe.
  • NPBCH and SIB1-NB cannot occupy one subframe at the same time and need to be sent in two subframes respectively. Therefore, if NPBCH and SIB1-NB are transmitted in the same radio frame, the sub-frame of the NPBCH is used.
  • the frame number is 5
  • the subframe number of the subframe occupied by the SIB1-NB is 0.
  • the subframe number of the subframe occupied by the SIB1-NB is 5.
  • the subframes occupied by the network device in the transmitted NPSS, NSSS, NPBCH, and SIB1-NB may be as shown in FIG. 5.
  • one radio frame includes 10 subframes, and the subframes in each radio frame are in the order of transmission, and the subframe numbers are 0 to 9, respectively.
  • the subframe used for transmitting the downlink signal is a downlink subframe, which is represented by D;
  • the subframe used for transmitting the uplink signal is an uplink subframe, which is represented by U;
  • the downlink subframe and the uplink subframe are separated by a special subframe.
  • the special subframe is denoted by S.
  • the network device sends NPSS and NSSS in the first carrier, where the NPSS is sent every 10ms, the NSSS is sent every 20ms, and the SFN of the NSSS radio frame is 2i, 2i+2, etc., i is not Negative integer.
  • the network device transmits NPBCH and SIB1-NB in the second carrier, where the NPBCH is transmitted every 10 ms, and the SIB1-NB is transmitted every 20 ms in consecutive 2N radio frames in each 2560 ms period. .
  • NPSS NPSS
  • NSSS NPBCH
  • SIB1-NB SIB1-NB
  • the network device can simultaneously transmit the NPSS, the NSSS, the NPBCH, the SIB1-NB through the first carrier and the second carrier, and because of the subframes of the subframe occupied by the NPSS and the NSSS in each cycle in the first carrier
  • the number is 5 or 0.
  • the subframe number of the subframe occupied by NPBCH and SIB1-NB in each period is 5 or 0, so NPSS, NSSS, NPBCH, and SIB1-NB can be used in any one.
  • the radio frame of the Uplink-downlink configuration in the TDD LTE system is transmitted in the TDD NB-IoT, so that the TDD NB-IoT and the TDD LTE system can be mutually compatible to the greatest extent, and the terminal device can receive with one set.
  • the machine accesses the synchronization signals in the FDD NB-IoT and TDD NB-IoT to reduce the cost of the terminal equipment, thereby improving system efficiency.
  • Step 402 The network device generates the NPBCH and the SIB1-NB, and sends the NPBCH according to the third period in the second carrier, and sends the SIB1-NB according to the fourth period.
  • the NPBCH is occupied in each period.
  • the subframe number of the subframe is P, and the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0, and Q is 5.
  • the first carrier used by the network device to send the NPSS and the NSSS may be a carrier pre-agreed by the network device and the terminal device, and the second carrier used by the NPBCH and the SIB1-NB may be associated with the first carrier. Carrier of the relationship.
  • the relationship between the first carrier and the second carrier is: the frequency interval between the first carrier and the second carrier is a preset frequency interval. It should be noted that the frequency interval between the first carrier and the second carrier herein may refer to a frequency interval between a center frequency of the first carrier and a center frequency of the second carrier.
  • the second carrier may be determined, thereby receiving the NPBCH and the SIB1-NB in the second carrier.
  • the Hadamard sequence set used by the NSSS can be used to indicate the frequency spacing between the first carrier and the second carrier.
  • the frequency interval between the first carrier and the second carrier may be a frequency interval mapped with the four Hadamard sequences included in the Hadamard sequence set used by the NSSS.
  • the Hadamard sequence set used by the NSSS includes four Hadamard sequences, and the four Hadamard sequences are mapped with one frequency interval.
  • a frequency interval is simultaneously mapped with four Hadamard sequences. Only a set of Hadamard sequences used by the NSSS, including four Hadamard sequences mapped to the frequency interval, can indicate a frequency interval.
  • one frequency interval is simultaneously mapped with 4 ⁇ Q Hadamard sequences, where Q is a positive integer greater than zero.
  • the network device Before generating the NSSS, the network device can establish a mapping relationship between the frequency interval and the Hadamard sequence. One frequency interval is simultaneously mapped with 4 ⁇ Q Hadamard sequences, and only 4 ⁇ Q Hadamard sequences appear in the NSSS at the same time. Indicates a frequency interval.
  • the network device determines the frequency interval between the first carrier and the second carrier, the 4 ⁇ Q Hadamard sequences mapped to the frequency interval are generated in the NSSS signal, and the original 4 Hadamard sequences in the NSSS signal remain unchanged.
  • the Hadamard sequence set used by the NSSS includes 4 ⁇ Q+4 Hadamard sequences, and the terminal device can determine the second carrier according to the frequency interval mapped with the 4 ⁇ Q Hadamard sequences.
  • the network device can add 8 Hadamard sequences based on the original 4 Hadamard sequences of NSSS.
  • the NSSS includes 12 Hadamard sequences.
  • the eight new Hadamard sequences in NSSS are orthogonal to the original four Hadamard sequences in NSSS.
  • the network device determines the frequency interval between the first carrier and the second carrier, the eight Hadamard sequences mapped to the frequency interval are generated in the NSSS, and the original four Hadamard sequences in the NSSS remain unchanged.
  • the network device can indicate the frequency interval between the first carrier and the second carrier to the terminal device by using eight new Hadamard sequences added in the NSSS.
  • step 403 after determining the first carrier, the terminal device determines, according to the NSSS received in the first carrier, the newly added eight Hadamard sequences included in the Hadamard sequence set used by the NSSS, and then according to the new The increased eight Hadamard sequences determine the frequency spacing between the first carrier and the second carrier, so that the second carrier can be determined, and finally the NPBCH, SIB1-NB are received in the second carrier.
  • Q is equal to other values, refer to the above description, and details are not described herein again.
  • the synchronization information that the terminal device can determine according to the received NPSS, NSSS, NPBCH, and SIB1-NB includes but is not limited to: an identifier in a physical cell group in the network device, a 5 ms timing of the physical cell, and a network device.
  • an identifier in a physical cell group in the network device a 5 ms timing of the physical cell, and a network device.
  • the time interval between the NPSS and the NSSS sent by the network device is different from the time interval between the NPSS and the NSSS sent by the network device in the FDD NB-IoT, and the terminal device is in the downlink synchronization process.
  • the current cell can be distinguished as TDD NB-IoT.
  • the cell is also an FDD NB-IoT cell, and thus correctly receives the NPBCH and the SIB1-NB.
  • the terminal device can access the FDD NB-IoT and the TDD NB-IoT with only one set of receivers, thereby reducing the cost of the terminal device.
  • the terminal device 600 includes: a transceiver unit 601 and a processing unit 602. .
  • the transceiver unit 601 is configured to receive, in the first carrier, a narrowband primary synchronization signal NPSS that is sent by the network device according to the first period, and a narrowband secondary synchronization signal NSSS that is sent according to the second period; where the NPSS is occupied by each period
  • the subframe number of the frame is M, the subframe number of the subframe occupied by the NSSS in each period is N; M is 5, N is 0, or M is 0, and N is 5;
  • the transceiver unit 601 is configured to receive, on a second carrier, a narrowband physical broadcast channel NPBCH that is sent by the network device according to a third period, and a narrowband system information block 1SIB1-NB that is sent according to a fourth period, where the NPBCH is in each
  • the subframe number of the subframe occupied by the period is P, and the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0, and Q is 5;
  • the processing unit 602 is configured to obtain downlink synchronization and system messages according to the NPSS, the NSSS, the NPBCH, and the SIB1-NB received by the transceiver unit 601.
  • a frequency interval between the first carrier and the second carrier is a preset frequency interval.
  • the Hadamard sequence set used by the NSSS includes four Hadamard sequences, and the four Hadamard sequences are mapped with one frequency interval;
  • the frequency interval between the first carrier and the second carrier is a frequency interval mapped with four Hadamard sequences in the Hadamard sequence set used by the NSSS.
  • the terminal device 700 includes: a processor 701 and a transceiver 702.
  • the processor 701 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.
  • the processor 701 may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.
  • the memory 703 may include a volatile memory such as a random-access memory (RAM); the memory may also include a non-volatile memory such as a flash memory.
  • RAM random-access memory
  • non-volatile memory such as a flash memory.
  • HDD hard disk drive
  • SSD solid-state drive
  • the memory 703 may also include a combination of the above types of memories.
  • the communication interface 704 can be a wired communication access port, a wireless communication interface, or a combination thereof, wherein the wired communication interface can be, for example, an Ethernet interface.
  • the Ethernet interface can be an optical interface, an electrical interface, or a combination thereof.
  • the wireless communication interface can be a WLAN interface.
  • the bus 705 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • Bus can be divided into Address bus, data bus, control bus, etc.
  • Address bus For ease of representation, only one double-headed arrow is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.
  • the memory 703 can be used to store program instructions, the processor 701 calls the program instructions stored in the memory 703, can perform one or more of the steps in the above-described embodiments, or an optional implementation thereof, such that access
  • the network node 700 implements the functions in the above method.
  • the transceiver 702 is configured to receive, in the first carrier, a narrowband primary synchronization signal NPSS that is sent by the network device according to the first period, and a narrowband secondary synchronization signal NSSS that is sent according to the second period; where the NPSS is occupied in each cycle.
  • the subframe number of the frame is M, the subframe number of the subframe occupied by the NSSS in each period is N; M is 5, N is 0, or M is 0, and N is 5;
  • the transceiver 702 is configured to receive, on a second carrier, a narrowband physical broadcast channel NPBCH that is sent by the network device according to a third period, and a narrowband system information block 1SIB1-NB that is sent according to a fourth period, where the NPBCH is in each
  • the subframe number of the subframe occupied by the period is P, and the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0, and Q is 5;
  • the processor 701 is configured to obtain downlink synchronization and system messages according to the NPSS, the NSSS, the NPBCH, and the SIB1-NB received by the transceiver 702.
  • a frequency interval between the first carrier and the second carrier is a preset frequency interval.
  • the Hadamard sequence set used by the NSSS includes four Hadamard sequences, and the four Hadamard sequences are mapped with one frequency interval;
  • the frequency interval between the first carrier and the second carrier is a frequency interval mapped with four Hadamard sequences in the Hadamard sequence set used by the NSSS.
  • the network device 800 is configured to perform the operations of the network device in the foregoing method embodiments, where the network device 800 includes: a processing unit 801 and a transceiver unit 802. .
  • the processing unit 801 is configured to generate a narrowband primary synchronization signal NPSS and a narrowband secondary synchronization signal NSSS;
  • the transceiver unit 802 is configured to send, according to the first period, the NPSS generated by the processing unit 801 in a first period, and send the NSSS generated by the processing unit 801 according to a second period; wherein the NPSS is in each The subframe number of the subframe occupied by the period is M, and the subframe number of the subframe occupied by the NSSS in each period is N; M is 5, N is 0, or M is 0, and N is 5;
  • the processing unit 801 is configured to generate a narrowband physical broadcast channel NPBCH, a narrowband system information block 1SIB1-NB;
  • the transceiver unit 802 is configured to send, according to the third period, the NPBCH generated by the processing unit 801 in a second period, and send the SIB1-NB generated by the processing unit 801 according to a fourth period;
  • the subframe number of the subframe occupied by the NPBCH in each period is P, and the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0, Q is 5.
  • a frequency interval between the first carrier and the second carrier is a preset frequency interval.
  • the Hadamard sequence set used by the NSSS includes four Hadamard sequences, and the four Hadamard sequences are mapped with one frequency interval;
  • the frequency interval between the first carrier and the second carrier is a frequency interval mapped with four Hadamard sequences in the Hadamard sequence set used by the NSSS.
  • the network device can be used to perform the operations of the network device in the foregoing method embodiments.
  • the network device 900 includes: a processor 901 and a transceiver 902.
  • the processor 901, the transceiver 902, the memory 903, and the communication interface 904 are connected to each other through a bus 905.
  • the processor 901 is configured to generate a narrowband primary synchronization signal NPSS and a narrowband secondary synchronization signal NSSS;
  • the transceiver 902 is configured to send, according to the first period, the NPSS generated by the processor 901 in a first period, and send the NSSS generated by the processor 901 according to a second period, where the NPSS is in each
  • the subframe number of the subframe occupied by the period is M, and the subframe number of the subframe occupied by the NSSS in each period is N; M is 5, N is 0, or M is 0, and N is 5;
  • the processor 901 is configured to generate a narrowband physical broadcast channel NPBCH, a narrowband system information block 1SIB1-NB;
  • the transceiver 902 is configured to send, according to a third period, the NPBCH generated by the processor 901 in a second period, and send the SIB1-NB generated by the processor 901 according to a fourth period;
  • the subframe number of the subframe occupied by the NPBCH in each period is P, and the subframe number of the subframe occupied by the SIB1-NB in each period is Q; P is 5, Q is 0, or P is 0, Q is 5.
  • a frequency interval between the first carrier and the second carrier is a preset frequency interval.
  • the Hadamard sequence set used by the NSSS includes four Hadamard sequences, and the four Hadamard sequences are mapped with one frequency interval;
  • the frequency interval between the first carrier and the second carrier is a frequency interval mapped with four Hadamard sequences in the Hadamard sequence set used by the NSSS.
  • each device embodiment may refer to related methods in the related method embodiments. Partial understanding.

Abstract

一种信号发送、接收方法及装置。其中方法包括：终端设备在第一载波接收网络设备按照第一周期发送的窄带主同步信号NPSS、按照第二周期发送的窄带辅同步信号NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；所述终端设备在第二载波接收所述网络设备按照第三周期发送的窄带物理广播信道NPBCH、按照第四周期发送的窄带系统信息块1SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5；所述终端设备根据所述NPSS、所述NSSS、所述NPBCH、所述SIB1-NB获得下行同步和系统消息。

Description

一种信号发送、接收方法及装置 技术领域
本申请涉及无线通信技术领域，特别涉及一种信号发送、接收方法及装置。
背景技术
移动通信标准化组织第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)提出了窄带物联网(Narrowband Internet of Things，NB-IOT)技术。支持NB-IoT的设备，在传输数据时使用的频带的带宽为180kHz，并支持以独立模式(Standalone operation)、保护带模式(Guardband operation)、带内模式(In-band operation)工作。其中，带内模式是指，利用长期演进(Long Term Evolution，LTE)系统中，一个载波内的一个或多个资源块来传输NB-IoT业务数据，其中一个资源块的带宽为180kHz。类似于LTE，NB-IOT技术分为时分双工(time division duplex，TDD)NB-IoT和频分双工(frequency division duplex，FDD)NB-IoT。
NB-IOT技术中，基站需要广播同步信号来通知终端设备一些同步信息，其中同步信号包括窄带主同步信号(Narrowband Primary Synchronization Signal，NPSS)、窄带辅同步信号(Narrowband Sencondary Synchronization Signal，NSSS)、窄带物理广播信道(Narrowband Physical Broadcast Channel，NPBCH)、窄带系统信息块1(System Information Block 1–NarrowBand，SIB1-NB)等。
TDD NB-IoT需要通过TDD LTE系统中定义的无线帧来广播同步信号，然而，TDD NB-IoT中的同步信号所需要的下行资源，与TDD LTE系统中无线帧所包括的下行资源之间的兼容性较差，导致无法保证NPSS、NSSS、NPBCH和SIB1-NB均按照固定周期发送。然而，NB-IoT技术是基于LTE系统的，所以TDD NB-IoT必须要实现兼容TDD LTE系统，因此，在TDD NB-IoT下，如何发送同步信号是一个亟待解决的问题。
发明内容
本申请实施方式的目的在于提供一种信号发送、接收方法及装置，用以实现TDD NB-IOT技术中，按照固定周期发送、接收同步信号。
第一方面，本申请实施例提供一种信号发送方法，包括：
终端设备在第一载波接收网络设备按照第一周期发送的窄带主同步信号NPSS、按照第二周期发送的窄带辅同步信号NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
所述终端设备在第二载波接收所述网络设备按照第三周期发送的窄带物理广播信道NPBCH、按照第四周期发送的窄带系统信息块1SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5；
所述终端设备根据所述NPSS、所述NSSS、所述NPBCH、所述SIB1-NB获得下行同步和系统消息。
上述方法中，终端接收到的NPSS和NSSS位于第一载波，而NPBCH和SIB1-NB位于第二载波，与FDD NB-IoT中通过同一载波发送的NPSS、NSSS、NPBCH、SIB1-NB相比，本申请实施例中NPSS和NSSS之间的时间间隔，与FDD NB-IoT中NPSS和NSSS之间的时间间隔不同，因此终端可以根据接收到的NPSS和NSSS之间的时间间隔，区分当前小区是TDD NB-IoT小区还是FDD NB-IoT小区，进而可以准确的在第二载波中接收NPBCH和SIB1-NB。同时，终端设备可以只用一套接收机接收本申请实施例中网络设备发送的同步信号，以及FDD NB-IoT中的同步信号，从而降低终端设备成本。
一种可选地实施方式中，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
一种可选地实施方式中，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
通过上述方法，通过NSSS使用的哈达玛序列集合中的4个哈达玛序列，不需要额外的指示信息，从而可以简单、高效的指示第一载波与所述第二载波之间的频率间隔。
第二方面，本申请实施例提供一种终端设备，所述终端设备包括存储器、收发机和处理器，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，并控制收发机进行信号接收和信号发送，当处理器执行存储器存储的指令时，终端设备用于执行上述第一方面或第一方面中任一种可能的设计中的方法。
第三方面，本申请实施例提供一种终端设备，用于实现上述第一方面或第一方面中的任意一种方法，包括相应的功能模块，例如包括处理单元、收发单元、处理单元等，分别用于实现以上方法中的步骤。
第四方面，本申请实施例提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述第一方面或第一方面中任一种可能的设计中的方法。
第五方面，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述第一方面或第一方面中任一种可能的设计中的方法。
第六方面，本申请实施例提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述第一方面或第一方面中任一种可能的设计中的方法。
第七方面，本申请实施例提供一种信号接收方法，包括：
网络设备生成窄带主同步信号NPSS、窄带辅同步信号NSSS，并在第一载波中按照第一周期发送所述NPSS、按照第二周期发送所述NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
所述网络设备生成窄带物理广播信道NPBCH、窄带系统信息块1SIB1-NB，并在第二载波中按照第三周期发送所述NPBCH、按照第四周期发送所述SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5。
通过上述方法，网络设备可以通过第一载波以及第二载波同时发送NPSS、NSSS、 NPBCH、SIB1-NB，并由于在第一载波中，NPSS以及NSSS在每个周期中占用的子帧的子帧号为5或者0，在第二载波中，NPBCH、SIB1-NB在每个周期中占用的子帧的子帧号为5或者0，因此NPSS、NSSS、NPBCH、SIB1-NB可以同时在采用任意一种TDD LTE系统中上下行配置的无线帧中发送，使得TDD NB-IoT与TDD LTE系统能够最大程度地互相兼容，此外，终端设备能够用一套接收机接入FDD NB-IoT和TDD NB-IoT中的同步信号，降低终端设备成本，从而提高系统效率。
一种可选地实施方式中，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
一种可选地实施方式中，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
第八方面，本申请实施例提供一种网络设备，所述网络设备包括存储器、收发机和处理器，其中：存储器用于存储指令；处理器用于根据执行存储器存储的指令，并控制收发机进行信号接收和信号发送，当处理器执行存储器存储的指令时，网络设备用于执行上述第七方面或第七方面中任一种可能的设计中的方法。
第九方面，本申请实施例提供一种网络设备，用于实现上述第七方面或第七方面中的任意一种方法，包括相应的功能模块，例如包括处理单元、收发单元、处理单元等，分别用于实现以上方法中的步骤。
第十方面，本申请实施例提供一种计算机可读存储介质，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行上述第七方面或第七方面中任一种可能的设计中的方法。
第十一方面，本申请实施例提供一种计算机程序产品，当计算机读取并执行所述计算机程序产品时，使得计算机执行上述第七方面或第七方面中任一种可能的设计中的方法。
第十二方面，本申请实施例提供一种芯片，所述芯片与存储器相连，用于读取并执行所述存储器中存储的软件程序，以实现上述第七方面或第七方面中任一种可能的设计中的方法。
附图说明
图1示例性示出了适用于本申请实施例的一种系统架构示意图；
图2为本申请实施例提供的一种带宽示意图；
图3为本申请实施例提供的一种带宽示意图；
图4为本申请实施例提供的一种信号发送方法流程示意图；
图5为本申请实施例提供的一种同步信号发送示意图；
图6为本申请实施例提供的一种终端设备结构示意图；
图7为本申请实施例提供的一种终端设备结构示意图；
图8为本申请实施例提供的一种网络设备结构示意图；
图9为本申请实施例提供的一种网络设备结构示意图。
具体实施方式
下面将结合附图对本申请实施例作进一步地详细描述。
本申请实施例可以应用于各种移动通信系统，例如：新无线(New Radio，NR)系统、全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、演进的长期演进(evolved Long Term Evolution，eLTE)系统等其它移动通信系统。
图1示例性示出了适用于本申请实施例的一种系统架构示意图，如图1所示，网络设备和终端设备1～终端设备6组成一个通信系统，在该通信系统中，网络设备发送信息给终端设备1～终端设备6中的一个或多个终端设备。此外，终端设备4～终端设备6也组成一个通信系统，在该通信系统中，终端设备5可以发送信息给终端设备4、终端设备6中的一个或多个终端设备。
本申请实施例中，终端设备可以经网络设备与核心网进行通信，终端设备可以指用户设备(User Equipment，UE)、接入终端设备、用户单元、用户站、移动站、移动台、远方站、远程终端设备、移动设备、用户终端设备、终端设备、无线通信设备、用户代理或用户装置。接入终端设备可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备等。
网络设备，可以称之为无线接入网(Radio Access Network，RAN)设备，以下统称为网络设备，主要负责为终端设备提供无线连接，保证终端设备的上下行数据的可靠传输等。网络设备可为5G系统中的gNB(generation Node B)，可以是全球移动通讯(Global System of Mobile communication，GSM)系统或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统中的基站(NodeB，NB)，还可以是长期演进(Long Term Evolution，LTE)系统中的演进型基站(Evolutional Node B，eNB或eNodeB)等。
本申请实施例中，NB-IoT中的设备(网络设备或终端设备)可以以独立模式、保护带模式、带内模式中的任一模式工作。网络设备在上述任一模式工作时，可以向终端设备发送同步信号。NB-IoT中的设备工作在独立模式时，可以利用GSM网络中的一个或者多个载波，来传输NB-IoT业务数据，该独立的载波的带宽为180kHz。
NB-IoT中的设备工作在带内模式时，可以利用LTE系统中，一个载波内的一个或多个资源块来传输NB-IoT业务数据，其中一个资源块的带宽为180kHz。具体可以如图2所示。图2中，一个LTE载波可以划分多个资源块，每个资源块的带宽为180kHz，NB-IoT中的设备可以使用其中一个或多个资源块来传输NB-IoT业务数据。
NB-IoT中的设备工作在保护带模式时，可以利用LTE系统中，载波的保护带传输NB-IoT业务数据，其中占用保护带的带宽为180kHz。具体可以如图3所示。图3中， NB-IoT中的终端设备可以使用LTE载波的保护带宽传输NB-IoT业务数据。
结合上述描述，如图4所示，为本申请实施例提供的一种信号发送方法流程示意图。参见图4，该方法包括：
步骤401：网络设备生成NPSS、NSSS，并在第一载波中按照第一周期发送所述NPSS、按照第二周期发送所述NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
步骤402：网络设备生成NPBCH、SIB1-NB，并在第二载波中按照第三周期发送所述NPBCH、按照第四周期发送所述SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5。
需要说明的是，步骤401和步骤402的先后顺序并不限定，步骤401和步骤402可以同时执行，也可以按照任意顺序执行。
步骤403：终端设备在第一载波接收网络设备按照第一周期发送的NPSS、按照第二周期发送的NSSS；所述终端设备在第二载波接收所述网络设备按照第三周期发送的NPBCH、按照第四周期发送的SIB1-NB；
需要说明的是，步骤403中，终端设备在第一载波中接收NPSS、NSSS，与在第二载波中接收NPBCH、SIB1-NB的先后顺序并不限定，终端设备可以同时在第一载波中和第二载波中接收上述信号，也可以按照任意顺序在第一载波中和第二载波中接收上述信号。
需要说明的是，第一载波和第二载波的带宽均为180kHz。
步骤404：终端设备根据所述NPSS、所述NSSS、所述NPBCH、所述SIB1-NB获得下行同步和系统消息。
步骤401中，NPSS指示信息可以包括：网络设备中物理小区组内的标识(Physical-layer Identification)、物理小区的5ms定时(timing)；NSSS指示信息可以包括：网络设备中物理小区组标识(Physical-layer cell-Identification group)、循环前缀配置(是正常的循环前缀还是扩展的循环前缀)、系统帧timing(即系统帧中子帧0所在的位置)。当然，以上只是示例，NPSS以及NSSS还可以指示其它信息，在此不再赘述。
本申请实施例中，发送NPSS的第一周期可以为一个无线帧的时间长度，即10ms，且每个第一周期中，只发送一次NPSS。NPSS可以位于每个无线帧的子帧号为0或5的子帧中发送，并占用该子帧的最后11个正交频分复用(Orthogonal Frequency Division Multiplexing，OFDM)符号。
相应的，发送NSSS的第二周期可以为两个无线帧的时间长度，即20ms，且每个第二周期中，只发送一次NSSS。NPSS可以位于每个无线帧的子帧号为0或5的子帧中发送，并占用该子帧的最后11个OFDM符号。其中，每个第二周期中，发送NSSS的无线帧的SFN可以为偶数。
NPSS、NSSS的具体传输规则，可以参考已有标准中的描述，在此不再赘述。
需要说明的是，NPSS和NSSS不可以同时占用一个子帧，需要分别在两个子帧中发送，因此，若NPSS和NSSS在同一个无线帧中发送，NPSS占用的子帧的子帧号为5时，NSSS占用的子帧的子帧号为0；相应的，NPSS占用的子帧的子帧号为0时，NSSS占用的子帧的子帧号为5。
步骤402中，NPBCH指示信息可以包括：下行系统带宽、系统帧号(system frame  number，SFN)、天线配置信息等；SIB1-NB指示信息可以包括：小区全球标识、小区禁止状态、小区选择参数、系统信息(System Information，SI)的传输周期等。
当然，以上只是示例，NPBCH以及SIB1-NB还可以指示其它信息，在此不再赘述。
本申请实施例中，发送NPBCH的第三周期可以为一个无线帧的时间长度，即10ms，且每个第三周期中，只发送一次NPBCH。NPBCH可以位于每个无线帧的子帧号为0或5的子帧中发送，并占用该子帧的最后11个OFDM符号。
相应的，发送SIB1-NB的第四周期可以为2560ms，且每个第四周期中，在连续的2N个无线帧中发送N次SIB1-NB，每2个无线帧中发送一次SIB1-NB，N为大于0的正整数。SIB1-NB可以位于每个无线帧的子帧号为0或5的子帧中发送，并占用该子帧的所有OFDM符号。
NPBCH、SIB1-NB的具体传输规则，可以参考已有标准中的描述，在此不再赘述。
需要说明的是，NPBCH、SIB1-NB不可以同时占用一个子帧，需要分别在两个子帧中发送，因此，若NPBCH、SIB1-NB在同一个无线帧中发送，NPBCH占用的子帧的子帧号为5时，SIB1-NB占用的子帧的子帧号为0；相应的，NPBCH占用的子帧的子帧号为0时，SIB1-NB占用的子帧的子帧号为5。
结合步骤401以及步骤402，网络设备在发送的NPSS、NSSS、NPBCH、SIB1-NB所占的子帧可以如图5所示。图5中，一个无线帧包括10个子帧，每个无线帧中的子帧按照发送顺序，子帧号分别为0至9。其中，用于传输下行信号的子帧为下行子帧，用D表示；用于传输上行信号的子帧为上行子帧，用U表示；下行子帧和上行子帧之间用特殊子帧隔开，该特殊子帧用S表示。
图5中，网络设备在第一载波中发送NPSS、NSSS，其中NPSS每隔10ms发送一次，NSSS每隔20ms发送一次，且发送NSSS的无线帧的SFN为2i、2i+2等，i为非负整数。
图5中，网络设备在第二载波中发送NPBCH、SIB1-NB，其中NPBCH每隔10ms发送一次，SIB1-NB在每个2560ms周期内的连续2N个无线帧中每隔20ms发送一次。。
当然，以上只是示例，网络设备具体如何发送NPSS、NSSS、NPBCH、SIB1-NB，可以有多种情况，在此不再逐一举例说明。
通过上述方法，网络设备通过第一载波以及第二载波可以同时发送NPSS、NSSS、NPBCH、SIB1-NB，并由于在第一载波中，NPSS以及NSSS在每个周期中占用的子帧的子帧号为5或者0，在第二载波中，NPBCH、SIB1-NB在每个周期中占用的子帧的子帧号为5或者0，因此NPSS、NSSS、NPBCH、SIB1-NB可以在采用任意一种TDD LTE系统中上下行配置(Uplink-downlink configuration)的无线帧在TDD NB-IoT中发送，使得TDD NB-IoT与TDD LTE系统能够最大程度地互相兼容，此外，终端设备能够用一套接收机接入FDD NB-IoT和TDD NB-IoT中的同步信号，降低终端设备成本，从而提高系统效率。
步骤402：网络设备生成NPBCH、SIB1-NB，并在第二载波中按照第三周期发送所述NPBCH、按照第四周期发送所述SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5。
本申请实施例中，网络设备发送NPSS、NSSS所使用的第一载波可以为网络设备与终端设备预先约定的载波，发送NPBCH、SIB1-NB所使用的第二载波可以为与第一载波具有关联关系的载波。
一种可能的场景中，第一载波与第二载波的关联关系为：第一载波与第二载波之间的频率间隔为预设频率间隔。需要说明的是，此处的第一载波与第二载波之间的频率间隔，可以是指第一载波的中心频点与第二载波的中心频点之间的频率间隔。
在该场景中，在步骤403中，终端设备确定第一载波之后，根据第一载波的频率，以及预设频率间隔，可以确定出第二载波，从而在第二载波中接收NPBCH、SIB1-NB。
一种可能的场景中，可以利用NSSS使用的哈达玛(Hadamard)序列集合指示第一载波与第二载波之间的频率间隔。此时，第一载波与第二载波之间的频率间隔，可以为与NSSS使用的哈达玛序列集合中包括的4个哈达玛序列映射的频率间隔。NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射。在该场景下，一个频率间隔同时与4个哈达玛序列映射，只有NSSS使用的哈达玛序列集合中，同时包括与该频率间隔映射的4个哈达玛序列时，才能指示出一个频率间隔。
网络设备与终端设备可以预先约定与4个哈达玛序列映射的频率间隔，网络设备确定第一载波与第二载波之间的频率间隔之后，将与该频率间隔映射的4个哈达玛序列生成于NSSS信号中，同时NSSS信号中原有的4个哈达玛序列保持不变，此时NSSS使用的哈达玛序列集合中包括8＝4+4个哈达玛序列，终端设备可以根据NSSS使用的哈达玛序列集合中包括的哈达玛序列，确定出其中4个哈达玛序列映射的频率间隔，从而确定第二载波。
可选的，一个频率间隔同时与4×Q个哈达玛序列映射，其中，Q为大于0的正整数。网络设备在生成NSSS之前，可以建立频率间隔与哈达玛序列的映射关系，其中一个频率间隔同时与4×Q个哈达玛序列映射，只有4×Q个哈达玛序列同时出现在NSSS中时，才能指示出一个频率间隔。网络设备确定第一载波与第二载波之间的频率间隔之后，将与该频率间隔映射的4×Q个哈达玛序列生成于NSSS信号中，同时NSSS信号中原有的4个哈达玛序列保持不变，此时NSSS使用的哈达玛序列集合中包括4×Q+4个哈达玛序列，终端设备可以根据与所述4×Q个哈达玛序列映射的频率间隔，确定第二载波。
例如，Q等于2，网络设备可以在NSSS原有的4个哈达玛序列的基础上，再新增8个哈达玛序列，此时NSSS包括12个哈达玛序列。NSSS中新增的8个哈达玛序列与NSSS中原有的4个哈达玛序列正交。网络设备确定第一载波与第二载波之间的频率间隔之后，将与该频率间隔映射的8个哈达玛序列生成于NSSS中，同时NSSS中原有的4个哈达玛序列保持不变，此时，网络设备可以通过NSSS中新增的8个哈达玛序列，向终端设备指示出第一载波与第二载波之间的频率间隔。此时，在步骤403中，终端设备确定第一载波之后，根据在第一载波中接收到的NSSS，确定NSSS使用的哈达玛序列集合中包括的新增的8个哈达玛序列，然后根据新增的8个哈达玛序列确定第一载波与第二载波之间的频率间隔，从而可以确定出第二载波，最后在第二载波中接收NPBCH、SIB1-NB。Q等于其他值时，可以参考上面的描述，在此不再赘述。
在步骤404中，终端设备根据接收到的NPSS、NSSS、NPBCH、SIB1-NB，可以确定出的同步信息包括但不限于：网络设备中物理小区组内的标识、物理小区的5ms定时、网络设备中物理小区组标识、循环前缀配置、系统帧timing、下行系统带宽、系统帧号、天线配置信息、小区全球标识、小区禁止状态、小区选择参数、系统信息的传输周期等。
通过上述方法，TDD NB-IoT中，网络设备发送的NPSS与NSSS之间的时间间隔，与FDD NB-IoT中网络设备发送的NPSS与NSSS之间的时间间隔不同，终端设备在下行同步过程中通过检测NPSS和NSSS之间的时间间隔就可以区分当前小区是TDD NB-IoT 小区还是FDD NB-IoT小区，进而正确接收NPBCH和SIB1-NB。终端设备可以只用一套接收机接入FDD NB-IoT和TDD NB-IoT，降低终端设备成本。
如图6所示，为本申请实施例提供一种终端设备结构示意图，该终端设备可以用于执行上述各方法实施例中终端设备的动作，该终端设备600包括：收发单元601和处理单元602。
收发单元601，用于在第一载波接收网络设备按照第一周期发送的窄带主同步信号NPSS、按照第二周期发送的窄带辅同步信号NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
所述收发单元601，用于在第二载波接收所述网络设备按照第三周期发送的窄带物理广播信道NPBCH、按照第四周期发送的窄带系统信息块1SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5；
处理单元602，用于根据所述收发单元601接收的所述NPSS、所述NSSS、所述NPBCH、所述SIB1-NB获得下行同步和系统消息。
一种可选地实施方式中，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
一种可选地实施方式中，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
如图7所示，为本申请实施例提供一种终端设备结构示意图，该终端设备可以用于执行上述各方法实施例中终端设备的动作，该终端设备700包括：处理器701、收发机702、存储器703和通信接口704；其中，处理器701、收发机702、存储器703和通信接口704通过总线705相互连接。
处理器701可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合。处理器701还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic,GAL)或其任意组合。
存储器703可以包括易失性存储器(volatile memory)，例如随机存取存储器(random-access memory，RAM)；存储器也可以包括非易失性存储器(non-volatile memory)，例如快闪存储器(flash memory)，硬盘(hard disk drive，HDD)或固态硬盘(solid-state drive，SSD)；存储器703还可以包括上述种类的存储器的组合。
通信接口704可以为有线通信接入口，无线通信接口或其组合，其中，有线通信接口例如可以为以太网接口。以太网接口可以是光接口，电接口或其组合。无线通信接口可以为WLAN接口。
总线705可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。总线可以分为 地址总线、数据总线、控制总线等。为便于表示，图7中仅用一条双向箭头表示，但并不表示仅有一根总线或一种类型的总线。
存储器703可以用于存储程序指令，处理器701调用该存储器703中存储的程序指令，可以执行上述方案中所示实施例中的一个或多个步骤，或其中可选的实施方式，使得接入网节点700实现上述方法中的功能。
收发机702，用于在第一载波接收网络设备按照第一周期发送的窄带主同步信号NPSS、按照第二周期发送的窄带辅同步信号NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
所述收发机702，用于在第二载波接收所述网络设备按照第三周期发送的窄带物理广播信道NPBCH、按照第四周期发送的窄带系统信息块1SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5；
处理器701，用于根据所述收发机702接收的所述NPSS、所述NSSS、所述NPBCH、所述SIB1-NB获得下行同步和系统消息。
一种可选地实施方式中，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
一种可选地实施方式中，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
如图8所示，为本申请实施例提供一种网络设备结构示意图，该网络设备可以用于执行上述各方法实施例中网络设备的动作，该网络设备800包括：处理单元801和收发单元802。
处理单元801，用于生成窄带主同步信号NPSS、窄带辅同步信号NSSS；
收发单元802，用于在第一载波中按照第一周期发送所述处理单元801生成的所述NPSS、按照第二周期发送所述处理单元801生成的所述NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
所述处理单元801，用于生成窄带物理广播信道NPBCH、窄带系统信息块1SIB1-NB；
所述收发单元802，用于在第二载波中按照第三周期发送所述处理单元801生成的所述NPBCH、按照第四周期发送所述处理单元801生成的所述SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5。
一种可选地实施方式中，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
一种可选地实施方式中，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
如图9所示，为本申请实施例提供一种网络设备结构示意图，该网络设备可以用于执行上述各方法实施例中网络设备的动作，该网络设备900包括：处理器901、收发机902、存储器903和通信接口904；其中，处理器901、收发机902、存储器903和通信接口904通过总线905相互连接，上述模块的具体内容可以参考图7中相关模块的描述，在此不再赘述。
处理器901，用于生成窄带主同步信号NPSS、窄带辅同步信号NSSS；
收发机902，用于在第一载波中按照第一周期发送所述处理器901生成的所述NPSS、按照第二周期发送所述处理器901生成的所述NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
所述处理器901，用于生成窄带物理广播信道NPBCH、窄带系统信息块1SIB1-NB；
所述收发机902，用于在第二载波中按照第三周期发送所述处理器901生成的所述NPBCH、按照第四周期发送所述处理器901生成的所述SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5。
一种可选地实施方式中，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
一种可选地实施方式中，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
本申请各方法实施例之间相关部分可以相互参考；各装置实施例所提供的装置用于执行对应的方法实施例所提供的方法，故各装置实施例可以参考相关的方法实施例中的相关部分进行理解。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关硬件来完成，所述的程序可以存储于一个设备的可读存储介质中，该程序在执行时，包括上述全部或部分步骤，所述的存储介质，如：磁盘存储器、光学存储器等。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，不同的实施例可以进行组合，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的精神和原则之内，所做的任何组合、修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (14)

  1. 一种信号接收方法，其特征在于，包括：
    终端设备在第一载波接收网络设备按照第一周期发送的窄带主同步信号NPSS、按照第二周期发送的窄带辅同步信号NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
    所述终端设备在第二载波接收所述网络设备按照第三周期发送的窄带物理广播信道NPBCH、按照第四周期发送的窄带系统信息块1SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5；
    所述终端设备根据所述NPSS、所述NSSS、所述NPBCH、所述SIB1-NB获得下行同步和系统消息。
  2. 根据权利要求1所述的方法，其特征在于，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
  3. 根据权利要求1所述的方法，其特征在于，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
    所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
  4. 一种信号接收方法，其特征在于，包括：
    网络设备生成窄带主同步信号NPSS、窄带辅同步信号NSSS，并在第一载波中按照第一周期发送所述NPSS、按照第二周期发送所述NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
    所述网络设备生成窄带物理广播信道NPBCH、窄带系统信息块1SIB1-NB，并在第二载波中按照第三周期发送所述NPBCH、按照第四周期发送所述SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5。
  5. 根据权利要求4所述的方法，其特征在于，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
  6. 根据权利要求4所述的方法，其特征在于，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
    所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
  7. 一种终端设备，其特征在于，包括：
    收发单元，用于在第一载波接收网络设备按照第一周期发送的窄带主同步信号NPSS、按照第二周期发送的窄带辅同步信号NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
    所述收发单元，用于在第二载波接收所述网络设备按照第三周期发送的窄带物理广播 信道NPBCH、按照第四周期发送的窄带系统信息块1SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5；
    处理单元，用于根据所述收发单元接收的所述NPSS、所述NSSS、所述NPBCH、所述SIB1-NB获得下行同步和系统消息。
  8. 根据权利要求7所述的终端设备，其特征在于，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
  9. 根据权利要求7所述的终端设备，其特征在于，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
    所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
  10. 一种网络设备，其特征在于，包括：
    处理单元，用于生成窄带主同步信号NPSS、窄带辅同步信号NSSS；
    收发单元，用于在第一载波中按照第一周期发送所述处理单元生成的所述NPSS、按照第二周期发送所述处理单元生成的所述NSSS；其中，所述NPSS在每个周期中占用的子帧的子帧号为M，所述NSSS在每个周期中占用的子帧的子帧号为N；M为5，N为0，或者M为0，N为5；
    所述处理单元，用于生成窄带物理广播信道NPBCH、窄带系统信息块1SIB1-NB；
    所述收发单元，用于在第二载波中按照第三周期发送所述处理单元生成的所述NPBCH、按照第四周期发送所述处理单元生成的所述SIB1-NB；其中，所述NPBCH在每个周期中占用的子帧的子帧号为P，所述SIB1-NB在每个周期中占用的子帧的子帧号为Q；P为5，Q为0，或者P为0，Q为5。
  11. 根据权利要求10所述的网络设备，其特征在于，所述第一载波与所述第二载波之间的频率间隔为预设频率间隔。
  12. 根据权利要求10所述的网络设备，其特征在于，所述NSSS使用的哈达玛序列集合中包括4个哈达玛序列，且所述4个哈达玛序列与一个频率间隔映射；
    所述第一载波与所述第二载波之间的频率间隔为与所述NSSS使用的哈达玛序列集合中的4个哈达玛序列映射的频率间隔。
  13. 一种计算机可读存储介质，其特征在于，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行如权利要求1-3任意一项所述的方法。
  14. 一种计算机可读存储介质，其特征在于，所述计算机存储介质中存储有计算机可读指令，当计算机读取并执行所述计算机可读指令时，使得计算机执行如权利要求4-6任意一项所述的方法。
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