WO2019227396A1 - 同步信号的检测和发送方法、装置及通信系统 - Google Patents

同步信号的检测和发送方法、装置及通信系统 Download PDF

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Publication number
WO2019227396A1
WO2019227396A1 PCT/CN2018/089264 CN2018089264W WO2019227396A1 WO 2019227396 A1 WO2019227396 A1 WO 2019227396A1 CN 2018089264 W CN2018089264 W CN 2018089264W WO 2019227396 A1 WO2019227396 A1 WO 2019227396A1
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Prior art keywords
subcarriers
carrier
synchronization signal
frequency band
center frequency
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PCT/CN2018/089264
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English (en)
French (fr)
Inventor
纪鹏宇
张磊
张健
王昕�
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富士通株式会社
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Priority to PCT/CN2018/089264 priority Critical patent/WO2019227396A1/zh
Publication of WO2019227396A1 publication Critical patent/WO2019227396A1/zh

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • Embodiments of the present invention relate to the field of communication technologies, and in particular, to a method, a device, and a communication system for detecting and sending a synchronization signal.
  • MTC Machine Type Communication
  • LTE Long Term Evolution
  • the MTC device needs to occupy 6 physical resource blocks (PRB) in the LTE carrier for data transmission, and the MTC device and the LTE device share the initial synchronization signal, such as the primary synchronization signal (PSS, Primary Synchronization Signal) and / Or Secondary Synchronization Signal (SSS, Secondary Synchronization Signal), that is, the MTC device also synchronizes with the system by detecting the PSS / SSS sequences on the 6 PRBs of the LTE carrier center.
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the first standard version of the fifth-generation (5G) New Radio (NR) system is nearing completion, and large-scale commercial deployment will be forthcoming in the future, and it will gradually replace the fourth-generation (4G) network.
  • future network equipment such as base stations
  • NR carriers will gradually replace LTE carriers to provide services to terminal equipment.
  • MTC equipment since the lifetime of MTC equipment is generally long, it is required that the MTC equipment can work on the NR carrier, so that the MTC equipment and the NR equipment can coexist and work well on the NR carrier.
  • the inventor has found that, in the case where the NR carrier and the LTE carrier coexist, there is currently no solution on how to perform synchronization signal detection.
  • Embodiments of the present invention provide a method, a device, and a communication system for detecting and sending a synchronization signal.
  • a scheme for how to perform synchronization signal detection is given.
  • a method for detecting a synchronization signal including:
  • the terminal equipment receives signals from network equipment carried by multiple subcarriers;
  • the terminal device performs synchronization signal detection on the signal according to a frequency band that does not have or does not distinguish a DC subcarrier and / or according to a frequency band that has or distinguishes a DC subcarrier.
  • a synchronization signal detection device including:
  • a signal receiving unit that receives signals carried by a plurality of subcarriers from a network device
  • a synchronization detection unit that detects the synchronization signal according to a frequency band that does not have or does not distinguish between DC subcarriers and / or a frequency band that has or distinguishes between DC subcarriers.
  • a method for sending a synchronization signal including:
  • Network equipment maps synchronization signals onto multiple subcarriers
  • the network device sends a signal carried by the plurality of subcarriers to a terminal device; wherein the signal is used by the terminal device according to a frequency band that does not have or does not distinguish DC subcarriers and / or Frequency band for synchronization signal detection.
  • a device for sending a synchronization signal including:
  • a signal mapping unit that maps synchronization signals onto multiple subcarriers
  • a signal transmitting unit that sends a signal carried by the plurality of subcarriers to a terminal device; wherein the signal is used by the terminal device according to a frequency band that does not have or does not distinguish DC subcarriers and / or The carrier frequency band performs synchronization signal detection.
  • a communication system including:
  • a terminal device including a detection device for a synchronization signal as described above;
  • the network device includes the transmitting device for the synchronization signal as described above.
  • the terminal device receives a signal carried by a plurality of subcarriers from a network device; and according to a frequency band that does not have or does not distinguish a direct current (DC, Direct Current) subcarrier and / or that has or distinguishes a DC
  • the frequency band of the subcarrier performs synchronization signal detection on the signal.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of using a part of an LTE carrier virtualized by an NR carrier as an MTC carrier;
  • FIG. 3 is a schematic diagram of using a part of an NR carrier as an MTC carrier
  • FIG. 4 is a schematic diagram of a synchronization signal detection method according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a frequency band with a DC subcarrier and a frequency band without a DC subcarrier according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of a method for detecting and transmitting a synchronization signal according to an embodiment of the present invention
  • FIG. 7 is a schematic diagram of a synchronization signal sending method according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a synchronization signal detection device according to an embodiment of the present invention.
  • FIG. 9 is a schematic diagram of a synchronization signal sending apparatus according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a network device according to an embodiment of the present invention.
  • FIG. 11 is a schematic diagram of a terminal device according to an embodiment of the present invention.
  • first and second are used to distinguish different elements from each other by title, but they do not indicate the spatial arrangement or chronological order of these elements, and these elements should not be used by these terms. Restricted.
  • the term “and / or” includes any and all combinations of one or more of the associated listed terms.
  • the terms “comprising”, “including”, “having” and the like refer to the presence of stated features, elements, elements or components, but do not exclude the presence or addition of one or more other features, elements, elements or components.
  • the term “communication network” or “wireless communication network” may refer to a network that conforms to any of the following communication standards, such as Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA, Wideband Code Division Multiple Access), High-Speed Packet Access (HSPA, High-Speed Packet Access), and so on.
  • LTE Long Term Evolution
  • LTE-A Enhanced Long Term Evolution
  • LTE-A LTE-A
  • WCDMA Wideband Code Division Multiple Access
  • High-Speed Packet Access High-Speed Packet Access
  • HSPA High-Speed Packet Access
  • communication between devices in a communication system may be performed according to a communication protocol at any stage, for example, it may include but is not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and 5G , New Radio (NR, New Radio), etc., and / or other communication protocols currently known or to be developed in the future.
  • 1G generation
  • 2G 2.5G, 2.75G
  • 5G New Radio
  • NR, New Radio New Radio
  • Network device refers to, for example, a device in a communication system that connects a terminal device to a communication network and provides services to the terminal device.
  • Network devices may include, but are not limited to, the following devices: base stations (BS, Base), access points (AP, Access Point), transmission and reception points (TRP, Transmission, Reception Point), broadcast transmitters, and mobile management entities (MME, Mobile Management entity), gateway, server, radio network controller (RNC, Radio Network Controller), base station controller (BSC, Base Station Controller), and so on.
  • the base station may include, but is not limited to, Node B (NodeB or NB), evolved Node B (eNodeB or eNB), 5G base station (gNB), etc., and may include a remote radio head (RRH, Remote Radio Head). , Remote radio unit (RRU, Remote Radio Unit), relay (relay) or low-power node (such as femeto, pico, etc.).
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • relay relay
  • low-power node such as femeto, pico, etc.
  • base station may include some or all of their functions, and each base station may provide communication coverage to a particular geographic area.
  • the term "cell” may refer to a base station and / or its coverage area, depending on the context in which the term is used.
  • the term "User Equipment” (UE) or “Terminal Equipment” (TE) refers to a device that accesses a communication network through a network device and receives network services.
  • the terminal device may be fixed or mobile, and may also be called a mobile station (MS, Mobile Station), a terminal, a subscriber station (SS, Subscriber Station), an access terminal (AT, Access Terminal), a station, and so on.
  • the terminal device may include, but is not limited to, the following devices: Cellular Phone, Personal Digital Assistant (PDA, Personal Digital Assistant), wireless modem, wireless communication device, handheld device, machine-type communication device, laptop computer, Cordless phones, smartphones, smart watches, digital cameras, and more.
  • PDA Personal Digital Assistant
  • wireless modem wireless communication device
  • handheld device machine-type communication device
  • laptop computer machine-type communication device
  • Cordless phones smartphones, smart watches, digital cameras, and more.
  • the terminal device can also be a machine or device that performs monitoring or measurement.
  • the terminal device can include but is not limited to: Machine Type Communication (MTC, Terminal), Vehicle communication terminals, device-to-device (D2D) terminals, machine-to-machine (M2M) terminals, and so on.
  • MTC Machine Type Communication
  • Terminal Vehicle communication terminals
  • D2D device-to-device
  • M2M machine-to-machine
  • network side refers to one side of the network, which may be a certain base station, or may include one or more network devices as described above.
  • user side or “terminal side” or “terminal device side” refers to the side of the user or terminal, which may be a certain UE, and may also include one or more terminal devices as described above.
  • FIG. 1 is a schematic diagram of a communication system according to an embodiment of the present invention, and schematically illustrates a case where a terminal device and a network device are taken as an example.
  • the communication system 100 may include a network device 101 and a terminal device 102.
  • FIG. 1 only uses one terminal device and one network device as an example for description, but the embodiment of the present invention is not limited thereto.
  • an existing service or a service that can be implemented in the future can be performed between the network device 101 and the terminal device 102.
  • these services may include, but are not limited to: enhanced mobile broadband (eMBB, enhanced Mobile Broadband), large-scale machine type communication (mMTC, massive Machine Type Communication), and high-reliability low-latency communication (URLLC, Ultra-Reliable and Low) -Latency Communication), etc.
  • some frequency domain resources can be reserved for use as a virtual LTE carrier.
  • the PRB occupied by MTC UE is limited to this virtual LTE carrier.
  • FIG. 2 is a schematic diagram of a part of the LTE carrier virtualized by the NR carrier as the MTC carrier.
  • the LTE carrier can be virtualized out of the NR carrier, and the MTC carrier (that is, the PRB occupied by the MTC UE) can be located at Virtual LTE carrier.
  • the terminal device since there is a DC subcarrier at its center frequency point, and the DC subcarrier is not used, the terminal device needs to perform synchronization signal detection according to 73 subcarriers during initial synchronization.
  • FIG. 3 is a schematic diagram of using a part of the NR carrier as the MTC carrier.
  • the MTC carrier that is, the PRB occupied by the MTC UE
  • the NR carrier may be located in the NR carrier.
  • the terminal device needs to perform Subcarriers for synchronization signal detection.
  • the embodiments of the present invention will be described below by taking the NR system and / or the LTE system as examples; however, the present invention is not limited to this, and can also be applied to any system or scenario with similar problems.
  • this application uses MTC UE as an example for description, but the present invention is not limited thereto, and may also be other types of terminal devices, for example.
  • FIG. 4 is a schematic diagram of a synchronization signal detection method according to an embodiment of the present invention, and illustrates a situation on a terminal device side. As shown in Figure 4, the method includes:
  • Step 401 The terminal device receives a signal carried by a plurality of subcarriers from a network device;
  • Step 402 The terminal device performs synchronization signal detection on the signal according to a frequency band that does not have or does not distinguish between DC subcarriers and / or a frequency band that has or distinguishes between DC subcarriers.
  • the multiple subcarriers may be on an NR carrier in an NR system, or the multiple subcarriers may be on an LTE carrier of an LTE system, or the multiple subcarriers may be based on the NR system.
  • the NR carrier is a virtual LTE carrier; the present invention is not limited thereto.
  • a frequency band that does not have or does not distinguish DC subcarriers is, for example, a part of frequency domain resources in an NR carrier, and may include 72 subcarriers; however, the present invention is not limited thereto. For example, for other types of UEs, other frequency bands may be used.
  • the number of subcarriers there is no such thing as not having or not distinguishing DC subcarriers: Although a DC subcarrier exists, the DC subcarrier is used to be the same or similar to other subcarriers; that is, no distinction is made between DC subcarriers and non-DC subcarriers. Case.
  • the frequency band having or distinguishing DC subcarriers is, for example, part of frequency domain resources in the LTE carrier, or part of frequency domain resources in the LTE carrier virtualized by the NR carrier, which may include 73 subcarriers; but the present invention Not limited to this, for other types of UEs, for example, other numbers of subcarriers may be used.
  • a frequency band having a DC subcarrier includes, for example, 73 subcarriers; a frequency band having no DC subcarrier includes, for example, 72 subcarriers.
  • FIG. 5 only illustrates the present embodiment by way of example, but the present invention is not limited thereto.
  • a DC subcarrier may exist in the carrier, but the DC subcarrier is normally used similarly to other subcarriers, that is, a DC subcarrier is not distinguished from a non-DC subcarrier, and the frequency band in this case also includes 72 subcarriers.
  • FIG. 6 is a schematic diagram of a method for detecting and sending a synchronization signal according to an embodiment of the present invention; further description will be made from a network device side and a terminal device side. As shown in Figure 6, the method includes:
  • Step 601 The network device maps the synchronization signal to multiple subcarriers.
  • the NR carrier when the base station sends PSS / SSS on the NR carrier according to the PSS / SSS mapping method of the LTE system, because the NR carrier does not have a DC subcarrier or does not distinguish between DC subcarriers, the DC may not be detected.
  • the subcarriers are reserved, and the number of subcarriers carrying the synchronization signal is 72.
  • the synchronization signal may be mapped to 6 PRBs composed of the 72 subcarriers (no DC subcarriers, or no distinction between DC subcarriers and non-DC subcarriers), and the center frequency points of the 6 PRBs are located at the terminal The device's detection raster.
  • the center frequency of the 6 PRBs may be the center frequency of the NR carrier or may not be the center frequency of the NR carrier; that is, the PSS / SSS need not be limited to the 6 PRBs near the center frequency, but may be located in the frequency band. 6 PRBs at other positions, as long as the center frequencies of the 6 PRBs are on the detection grid of the terminal device.
  • the base station when the base station sends the PSS / SSS on the LTE carrier virtualized from the LTE carrier or the NR carrier according to the LTE PSS / SSS mapping method, due to the LTE If the carrier has DC subcarriers or is distinguished, the number of subcarriers carrying synchronization signals is 73.
  • the synchronization signal is mapped onto 6 PRBs composed of 72 subcarriers out of the 73 subcarriers, and the center frequency points of the 6 PRBs are located in the detection grid of the terminal device.
  • the sub-carriers of the central frequency band positions of the six PRBs are the DC sub-carriers; the central frequency of the six PRBs is the central frequency of the LTE carrier or the central frequency of the LTE carrier virtualized by the NR carrier.
  • the synchronization signal will be mapped to the resource particles (RE, Resource Element) corresponding to the subcarriers on both sides of the DC subcarrier at the corresponding time, and the RE carrying the synchronization signal will be transmitted.
  • the number is 72.
  • the frequency band for synchronization detection includes 73 subcarriers.
  • Step 602 The network device sends a signal carried by the multiple subcarriers to a terminal device.
  • Step 603 The terminal device performs synchronization signal detection according to a frequency band that does not have or does not distinguish DC subcarriers and / or according to a frequency band that has or distinguishes DC subcarriers.
  • the terminal device has, for example, the ability to detect synchronization signals on 73 subcarriers and 72 subcarriers, that is, the ability to detect synchronization signals is enhanced.
  • the initial synchronization signal since there is no prior information, it is necessary to perform blind detection on the initial synchronization signals of two modes (for example, 72 subcarriers or 73 subcarriers).
  • the terminal device may also detect a subcarrier interval of the signal. For example, when the MTC UE detects according to 72 subcarriers, it is necessary to detect the possible subcarrier interval size, for example, to determine whether the subcarrier interval is 15kHz or 30kHz.
  • the terminal device when the terminal device fails to perform the synchronization signal detection on the signal according to the frequency band that does not have or does not distinguish DC subcarriers, the terminal device performs The frequency band of the DC subcarrier performs synchronization signal detection on the signal.
  • synchronization signal detection can be performed first according to 72 subcarriers (corresponding to the NR carrier). If synchronization is not successful, synchronization signal detection is performed according to 73 subcarriers (corresponding to the LTE carrier or the virtual LTE carrier in the NR carrier).
  • the terminal device in a case where the terminal device fails to perform the synchronization signal detection on the signal according to the frequency band having or distinguishing a DC subcarrier, the terminal device performs The frequency band of the DC sub-carrier is distinguished to perform synchronization signal detection on the signal.
  • synchronization signal detection may be performed first according to 73 subcarriers (corresponding to the LTE carrier or the virtual LTE carrier in the NR carrier). If synchronization is not successful, synchronization signal detection is performed according to 72 subcarriers (corresponding to the NR carrier).
  • the terminal device receives a signal carried by a plurality of subcarriers from a network device; and performs the signal according to a frequency band that does not have or distinguishes a DC subcarrier and / or according to a frequency band that has or distinguishes a DC subcarrier.
  • Sync signal detection can be accurately performed even when the NR carrier and the LTE carrier coexist.
  • An embodiment of the present invention provides a method for sending a synchronization signal, and the same content as in Embodiment 1 is not described again.
  • FIG. 7 is a schematic diagram of a method for sending a synchronization signal according to an embodiment of the present invention, illustrating a situation on a network device side. As shown in Figure 7, the method includes:
  • Step 701 The network device maps the synchronization signal to multiple subcarriers.
  • Step 702 The network device sends a signal carried by the multiple subcarriers to a terminal device; wherein the signal is used by the terminal device according to a frequency band that does not have or does not distinguish DC subcarriers and / or according to whether it has or distinguishes DC subcarriers.
  • the carrier frequency band performs synchronization signal detection.
  • the multiple subcarriers are on an NR carrier in an NR system, or the multiple subcarriers are on an LTE carrier in an LTE system, or the multiple subcarriers are based on the NR system based on the NR system.
  • the NR carrier is virtualized on the LTE carrier.
  • FIG. 7 above only illustrates the embodiment of the present invention schematically, but the present invention is not limited thereto.
  • the execution order between steps can be adjusted as appropriate.
  • other steps can be added or some steps can be reduced.
  • Those skilled in the art may make appropriate modifications based on the foregoing, and are not limited to the description of FIG. 7 described above.
  • the frequency band having no or indistinguishable DC subcarriers includes 72 subcarriers, and the synchronization signal is mapped onto 6 PRBs composed of the 72 subcarriers, and the centers of the 6 PRBs The frequency points are located in a detection grid of the terminal device.
  • the center frequency of the six PRBs may be the center frequency of the NR carrier, or may not be the center frequency of the NR carrier.
  • the frequency band having or distinguishing DC subcarriers includes 73 subcarriers, and the synchronization signal is mapped onto 6 PRBs composed of 72 subcarriers out of the 73 subcarriers, and the 6 The center frequency of each PRB is located in the detection grid of the terminal device.
  • the sub-carriers of the central frequency band positions of the six PRBs are the DC sub-carriers; the central frequency of the six PRBs is the central frequency of the LTE carrier or the central frequency of the LTE carrier virtualized by the NR carrier. point.
  • the terminal device receives a signal carried by a plurality of subcarriers from a network device; and performs the signal according to a frequency band that does not have or distinguishes a DC subcarrier and / or according to a frequency band that has or distinguishes a DC subcarrier.
  • Sync signal detection can be accurately performed even when the NR carrier and the LTE carrier coexist.
  • An embodiment of the present invention provides an information determining device.
  • the device may be, for example, a terminal device, or may be some or some parts or components configured on the terminal device.
  • the content of the third embodiment is the same as that of the first embodiment and will not be described again.
  • FIG. 8 is a schematic diagram of a synchronization signal detection device according to an embodiment of the present invention. As shown in FIG. 8, the synchronization signal detection device 800 includes:
  • a signal receiving unit 801 that receives a signal carried by a plurality of subcarriers from a network device
  • the synchronization detection unit 802 performs synchronization signal detection on the signal according to a frequency band that does not have or does not distinguish between DC subcarriers and / or a frequency band that has or distinguishes between DC subcarriers.
  • the multiple subcarriers are on an NR carrier in an NR system, or the multiple subcarriers are on an LTE carrier in an LTE system, or the multiple subcarriers are based on the NR by the NR system.
  • the carrier is virtual out of the LTE carrier.
  • the synchronization signal detection device 800 may further include:
  • An information detection unit 803 detects a subcarrier interval of the signal.
  • the frequency band having no or indistinguishable DC subcarriers includes 72 subcarriers, and the synchronization signal is mapped onto 6 PRBs composed of the 72 subcarriers, and the centers of the 6 PRBs The frequency points are located in a detection grid of the terminal device.
  • the center frequency of the six PRBs may be the center frequency of the NR carrier, or may not be the center frequency of the NR carrier.
  • the frequency band having or distinguishing DC subcarriers includes 73 subcarriers, and the synchronization signal is mapped onto 6 PRBs composed of 72 subcarriers out of the 73 subcarriers, and the 6 The center frequency of each PRB is located in the detection grid of the terminal device.
  • the sub-carriers of the central frequency band positions of the six PRBs are the DC sub-carriers; the central frequency of the six PRBs is the central frequency of the LTE carrier or the central frequency of the LTE carrier virtualized by the NR carrier. point.
  • the synchronization detection unit 802 may be further configured to: in a case where the synchronization signal is not successfully detected on the signal according to the frequency band that does not have or does not distinguish DC subcarriers, according to the Synchronous signal detection is performed on the signal with or distinguishing a frequency band of a DC subcarrier.
  • the synchronization detection unit 802 may be further configured to: in a case where the synchronization signal is not successfully detected on the signal according to the frequency band having or distinguishing a DC subcarrier, according to the Synchronous signal detection is performed on the signal with or without distinguishing frequency bands of DC subcarriers.
  • the synchronization signal detection device 800 may further include other components or modules. For specific content of these components or modules, reference may be made to related technologies.
  • FIG. 8 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection may be adopted.
  • the foregoing components or modules may be implemented by hardware facilities such as a processor, a memory, a transmitter, and a receiver; the implementation of the present invention does not limit this.
  • the terminal device receives a signal carried by a plurality of subcarriers from a network device; and performs the signal according to a frequency band that does not have or distinguishes a DC subcarrier and / or according to a frequency band that has or distinguishes a DC subcarrier.
  • Sync signal detection can be accurately performed even when the NR carrier and the LTE carrier coexist.
  • An embodiment of the present invention provides a device for sending a synchronization signal.
  • the apparatus may be, for example, a network device, or may be a component or a component or a component configured on the network device.
  • the content of the fourth embodiment is the same as that of the second embodiment and will not be described again.
  • FIG. 9 is a schematic diagram of a synchronization signal sending apparatus according to an embodiment of the present invention. As shown in FIG. 9, the synchronization signal sending apparatus 900 includes:
  • a signal mapping unit 901 that maps a synchronization signal onto a plurality of subcarriers
  • a signal sending unit 902 which sends a signal carried by the multiple subcarriers to a terminal device; wherein the signal is used by the terminal device according to a frequency band that does not have or does not distinguish DC subcarriers and / or The sub-carrier frequency band performs synchronization signal detection.
  • the multiple subcarriers are on an NR carrier in an NR system, or the multiple subcarriers are on an LTE carrier in an LTE system, or the multiple subcarriers are based on the NR by the NR system.
  • the carrier is virtual out of the LTE carrier.
  • the frequency band having no or indistinguishable DC subcarriers includes 72 subcarriers, and the synchronization signal is mapped onto 6 PRBs composed of the 72 subcarriers, and the centers of the 6 PRBs The frequency points are located in a detection grid of the terminal device.
  • the center frequency of the six PRBs may be the center frequency of the NR carrier, or may not be the center frequency of the NR carrier.
  • the frequency band having or distinguishing DC subcarriers includes 73 subcarriers, and the synchronization signal is mapped onto 6 PRBs composed of 72 subcarriers out of the 73 subcarriers, and the 6 The center frequency of each PRB is located in the detection grid of the terminal device.
  • the sub-carriers of the central frequency band positions of the six PRBs are the DC sub-carriers; the central frequency of the six PRBs is the central frequency of the LTE carrier or the central frequency of the LTE carrier virtualized by the NR carrier. point.
  • the synchronization signal sending device 900 may further include other components or modules. For specific content of these components or modules, reference may be made to related technologies.
  • FIG. 9 only exemplarily shows the connection relationship or signal direction between various components or modules, but it should be clear to those skilled in the art that various related technologies such as bus connection can be adopted.
  • the foregoing components or modules may be implemented by hardware facilities such as a processor, a memory, a transmitter, and a receiver; the implementation of the present invention does not limit this.
  • the terminal device receives a signal carried by a plurality of subcarriers from a network device; and performs the signal according to a frequency band that does not have or does not distinguish a DC subcarrier and / or a frequency band that has a DC or regional molecular carrier.
  • Sync signal detection can be accurately performed even when the NR carrier and the LTE carrier coexist.
  • the communication system 100 may include:
  • the network device 101 is configured with the sending apparatus 900 for a synchronization signal according to the fourth embodiment
  • the terminal device 102 is configured with the synchronization signal detection device 800 according to the third embodiment.
  • An embodiment of the present invention further provides a network device, which may be, for example, a base station, but the present invention is not limited thereto, and may also be another network device.
  • a network device which may be, for example, a base station, but the present invention is not limited thereto, and may also be another network device.
  • FIG. 10 is a schematic structural diagram of a network device according to an embodiment of the present invention.
  • the network device 1000 may include: a processor 1010 (such as a central processing unit CPU) and a memory 1020; the memory 1020 is coupled to the processor 1010.
  • the memory 1020 can store various data; in addition, a program 1030 for information processing is stored, and the program 1030 is executed under the control of the processor 1010.
  • the processor 1010 may be configured to execute the program 1030 to implement the synchronization signal transmission method as described in Embodiment 2.
  • the processor 1010 may be configured to perform the following control: mapping a synchronization signal to multiple subcarriers; and sending a signal carried by the multiple subcarriers to a terminal device; wherein the signal is used by the terminal device to The synchronization signal detection is performed without or with no distinction between the frequency bands of the DC subcarriers and / or according to the frequency bands with or without the DC subcarriers.
  • the network device 1000 may further include a transceiver 1040, an antenna 1050, and the like; wherein the functions of the above components are similar to those in the prior art, and are not repeated here. It is worth noting that the network device 1000 does not have to include all the components shown in FIG. 10; in addition, the network device 1000 may also include components not shown in FIG. 10, and reference may be made to the prior art.
  • An embodiment of the present invention further provides a terminal device, but the present invention is not limited thereto, and may also be another device.
  • FIG. 11 is a schematic diagram of a terminal device according to an embodiment of the present invention.
  • the terminal device 1100 may include a processor 1110 and a memory 1120; the memory 1120 stores data and programs, and is coupled to the processor 1110. It is worth noting that this figure is exemplary; other types of structures can also be used to supplement or replace the structure to implement telecommunication functions or other functions.
  • the processor 1110 may be configured to execute a program to implement the method for detecting a synchronization signal as described in Embodiment 1.
  • the processor 1110 may be configured to perform control of: receiving signals carried by a plurality of subcarriers from a network device; and according to a frequency band having no or indistinguishable DC subcarriers and / or according to a frequency band having or distinguishing DC subcarriers Synchronous signal detection is performed on the signal.
  • the terminal device 1100 may further include a communication module 1130, an input unit 1140, a display 1150, and a power supply 1160.
  • the functions of the above components are similar to those in the prior art, and are not repeated here. It is worth noting that the terminal device 1100 does not have to include all the components shown in FIG. 11, and the above components are not necessary. In addition, the terminal device 1100 may also include components not shown in FIG. 11. There is technology.
  • An embodiment of the present invention further provides a computer-readable program, wherein when the program is executed in a network device, the program causes the network device to execute the method for sending a synchronization signal according to Embodiment 2.
  • An embodiment of the present invention further provides a storage medium storing a computer-readable program, wherein the computer-readable program causes a network device to execute the method for sending a synchronization signal according to Embodiment 2.
  • An embodiment of the present invention further provides a computer-readable program, wherein when the program is executed in a terminal device, the program causes the terminal device to perform the method for detecting a synchronization signal according to Embodiment 1.
  • An embodiment of the present invention further provides a storage medium storing a computer-readable program, wherein the computer-readable program causes a terminal device to execute the method for detecting a synchronization signal according to Embodiment 1.
  • the above devices and methods of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer-readable program that, when the program is executed by a logic component, enables the logic component to implement the apparatus or constituent components described above, or causes the logic component to implement various methods described above. Or steps.
  • the present invention also relates to a storage medium for storing the above programs, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, and the like.
  • the method / apparatus described in combination with the embodiments of the present invention may be directly embodied as hardware, a software module executed by a processor, or a combination of the two.
  • one or more of the functional block diagrams and / or one or more combinations of functional block diagrams shown in the figure may correspond to each software module of a computer program flow, or to each hardware module.
  • These software modules can respectively correspond to the steps shown in the figure.
  • These hardware modules can be implemented by using a field programmable gate array (FPGA) to cure these software modules.
  • FPGA field programmable gate array
  • a software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
  • a storage medium may be coupled to the processor so that the processor can read information from and write information to the storage medium; or the storage medium may be a component of the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal.
  • the software module may be stored in the MEGA-SIM card or a large-capacity flash memory device.
  • the functional blocks and / or one or more combinations of the functional blocks described in the drawings it may be implemented as a general-purpose processor, a digital signal processor (DSP) for performing the functions described in the present invention. ), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any suitable combination thereof.
  • DSP digital signal processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • One or more of the functional blocks and / or one or more combinations of the functional blocks described with respect to the drawings may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessors Processor, one or more microprocessors in conjunction with DSP communications, or any other such configuration.
  • a method for detecting a synchronization signal including:
  • the terminal equipment receives signals from network equipment carried by multiple subcarriers;
  • the terminal device performs synchronization signal detection on the signal according to a frequency band that does not have or does not distinguish a DC subcarrier and / or according to a frequency band that has or distinguishes a DC subcarrier.
  • Attachment 2 The method according to Attachment 1, wherein the multiple subcarriers are on an NR carrier in a new wireless (NR) system, or the multiple subcarriers are on an LTE carrier in a long-term evolution (LTE) system Or, the plurality of subcarriers are on an LTE carrier that is virtualized by the NR system based on the NR carrier.
  • NR new wireless
  • LTE long-term evolution
  • Supplementary note 3 The method according to supplementary note 1 or 2, wherein the method further comprises:
  • the terminal device detects a subcarrier interval of the signal.
  • Supplementary note 4 The method according to any one of supplementary notes 1 to 3, wherein the frequency band having no or indistinguishable DC subcarriers includes 72 subcarriers.
  • Supplementary note 5 The method according to supplementary note 4, wherein the synchronization signal is mapped onto six physical resource blocks composed of the 72 subcarriers, and a center frequency point of the six physical resource blocks is located at the terminal Device detection grid.
  • Supplementary note 7 The method according to supplementary note 5, wherein the center frequency point of the six physical resource blocks is not the center frequency point of the NR carrier.
  • Supplementary note 8 The method according to any one of supplementary notes 1 to 3, wherein the frequency band having or distinguishing a DC subcarrier includes 73 subcarriers.
  • Attachment 9 The method according to Attachment 8, wherein the synchronization signal is mapped onto 6 physical resource blocks composed of 72 subcarriers out of the 73 subcarriers, and the center frequency of the 6 physical resource blocks The point is located in a detection grid of the terminal device.
  • Supplementary note 10 The method according to supplementary note 9, wherein the subcarriers at the center frequency band positions of the six physical resource blocks are the DC subcarriers; the central frequency points of the six physical resource blocks are LTE carriers Is the center frequency of the LTE carrier or the center frequency of the LTE carrier virtualized by the NR carrier.
  • Supplementary note 11 The method according to any one of supplementary notes 1 to 10, wherein the method further comprises:
  • the terminal device In the case that the terminal device fails to perform the synchronization signal detection on the signal according to the frequency band that does not have or does not distinguish DC subcarriers, the terminal device compares the frequency band that has or distinguishes DC subcarriers The signal performs synchronization signal detection.
  • Supplementary note 12 The method according to any one of supplementary notes 1 to 10, wherein the method further comprises:
  • the terminal device In the case that the terminal device fails to perform the synchronization signal detection on the signal according to the frequency band having or distinguishing the DC subcarrier, the terminal device compares the frequency band according to the frequency band having no or not distinguishing the DC subcarrier. The signal performs synchronization signal detection.
  • Appendix 13 A method for sending a synchronization signal, including:
  • Network equipment maps synchronization signals onto multiple subcarriers
  • the network device sends a signal carried by the plurality of subcarriers to a terminal device; wherein the signal is used by the terminal device according to a frequency band that does not have or does not distinguish DC subcarriers and / or Frequency band for synchronization signal detection.
  • Supplementary note 14 The method according to supplementary note 13, wherein the plurality of subcarriers are on an NR carrier in a new wireless (NR) system, or the plurality of subcarriers are on an LTE carrier in a long-term evolution (LTE) system Or the multiple subcarriers are on an LTE carrier virtualized by the NR system based on the NR carrier.
  • NR new wireless
  • LTE long-term evolution
  • Supplementary note 15 The method according to supplementary note 13 or 14, wherein the frequency band that does not have or does not distinguish between DC subcarriers includes 72 subcarriers.
  • Appendix 16 The method according to Appendix 15, wherein the synchronization signal is mapped onto 6 physical resource blocks composed of the 72 subcarriers, and a center frequency point of the 6 physical resource blocks is located at The terminal device is described in the detection grid.
  • Appendix 17 The method according to Appendix 16, wherein the center frequency of the six physical resource blocks is the center frequency of an NR carrier, or the center frequency of the six physical resource blocks is not an NR carrier The center frequency.
  • Supplementary note 18 The method according to supplementary note 13 or 14, wherein the frequency band having or distinguishing a DC subcarrier includes 73 subcarriers.
  • Supplementary note 19 The method according to supplementary note 18, wherein the synchronization signal is mapped onto 6 physical resource blocks composed of 72 subcarriers out of the 73 subcarriers, and The center frequency point is located in a detection grid of the terminal device.
  • Supplementary note 20 The method according to supplementary note 19, wherein the subcarrier at the center frequency band position of the six physical resource blocks is the DC subcarrier; the central frequency point of the six physical resource blocks is an LTE carrier Is the center frequency of the LTE carrier or the center frequency of the LTE carrier virtualized by the NR carrier.

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Abstract

一种同步信号的检测和发送方法、装置及通信系统。所述方法包括：终端设备接收来自网络设备的由多个子载波承载的信号；以及按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。由此，既考虑到具有或区分DC子载波的情况又考虑到不具有或不区分DC子载波的情况，在NR载波和LTE载波共存的情况下也能够准确地进行同步信号检测。

Description

同步信号的检测和发送方法、装置及通信系统 技术领域
本发明实施例涉及通信技术领域，特别涉及一种同步信号的检测和发送方法、装置及通信系统。
背景技术
在现有技术中，机器类型通信(MTC，Machine Type Communication)部署在长期演进(LTE，Long Term Evolution)系统的载波上。其中MTC设备需要占据LTE载波中的6个物理资源块(PRB，Physical Resource Block)进行数据传输，且MTC设备与LTE设备共用初始的同步信号，例如主同步信号(PSS，Primary Synchronization Signal)和/或辅同步信号(SSS，Secondary Synchronization Signal)，即MTC设备也是通过检测LTE载波中心的6个PRB上的PSS/SSS序列与系统进行同步的。
此外，第五代(5G)新无线(NR，New Radio)系统的首个标准版本已经接近完成，未来即将得到大规模商用部署，并逐渐取代第四代(4G)网络。在今后的网络设备(例如基站)上，NR载波将逐渐取代LTE载波，为终端设备提供服务。但由于MTC设备的寿命普遍较长，则需要MTC设备能够工作在NR载波上，使MTC设备和NR设备能够在NR载波上良好地共存工作。
应该注意，上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明，并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现：对于在NR载波和LTE载波共存的情况下，目前没有给出如何进行同步信号检测的方案。
本发明实施例提供一种同步信号的检测和发送方法、装置及通信系统。对于在NR载波和LTE载波共存的情况下，给出如何进行同步信号检测的方案。
根据本发明实施例的第一个方面，提供一种同步信号的检测方法，包括：
终端设备接收来自网络设备的由多个子载波承载的信号；以及
所述终端设备按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。
根据本发明实施例的第二个方面，提供一种同步信号的检测装置，包括：
信号接收单元，其接收来自网络设备的由多个子载波承载的信号；以及
同步检测单元，其按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。
根据本发明实施例的第三个方面，提供一种同步信号的发送方法，包括：
网络设备将同步信号映射到多个子载波上；以及
所述网络设备向终端设备发送由所述多个子载波承载的信号；其中所述信号被所述终端设备用于按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带进行同步信号检测。
根据本发明实施例的第四个方面，提供一种同步信号的发送装置，包括：
信号映射单元，其将同步信号映射到多个子载波上；以及
信号发送单元，其向终端设备发送由所述多个子载波承载的信号；其中所述信号被所述终端设备用于按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带进行同步信号检测。
根据本发明实施例的第五个方面，提供一种通信系统，包括：
终端设备，其包括如上所述的同步信号的检测装置；以及
网络设备，其包括如上所述的同步信号的发送装置。
本发明实施例的有益效果在于：终端设备接收来自网络设备的由多个子载波承载的信号；以及按照不具有或不区分直流(DC，Direct Current)子载波的频带和/或按照具有或区分DC子载波的频带对所述信号进行同步信号检测。由此，既考虑到具有或区分DC子载波的情况又考虑到不具有或不区分DC子载波的情况，在NR载波和LTE载波共存的情况下也能够准确地进行同步信号检测。
参照后文的说明和附图，详细公开了本发明的特定实施方式，指明了本发明的原理可以被采用的方式。应该理解，本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内，本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用，与其它实施方式中的特征相组合，或替代其它实施方式中的 特征。
应该强调，术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在，但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
附图说明
在本发明实施例的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外，在附图中，类似的标号表示几个附图中对应的部件，并可用于指示多于一种实施方式中使用的对应部件。
图1是本发明实施例的通信系统的示意图；
图2是将NR载波虚拟出的LTE载波中的一部分作为MTC载波的示意图；
图3是将NR载波中的一部分作为MTC载波的示意图；
图4是本发明实施例的同步信号的检测方法的示意图；
图5是本发明实施例的具有DC子载波的频带和不具有DC子载波的频带的示意图；
图6是本发明实施例的同步信号的检测和发送方法的示意图；
图7是本发明实施例的同步信号的发送方法的示意图；
图8是本发明实施例的同步信号的检测装置的示意图；
图9是本发明实施例的同步信号的发送装置的示意图；
图10是本发明实施例的网络设备的示意图；
图11是本发明实施例的终端设备的示意图。
具体实施方式
参照附图，通过下面的说明书，本发明的前述以及其它特征将变得明显。在说明书和附图中，具体公开了本发明的特定实施方式，其表明了其中可以采用本发明的原则的部分实施方式，应了解的是，本发明不限于所描述的实施方式，相反，本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。
在本发明实施例中，术语“第一”、“第二”等用于对不同元素从称谓上进行区分，但并不表示这些元素的空间排列或时间顺序等，这些元素不应被这些术语所限制。术语“和/或”包括相关联列出的术语的一种或多个中的任何一个和所有组合。术语 “包含”、“包括”、“具有”等是指所陈述的特征、元素、元件或组件的存在，但并不排除存在或添加一个或多个其他特征、元素、元件或组件。
在本发明实施例中，单数形式“一”、“该”等包括复数形式，应广义地理解为“一种”或“一类”而并不是限定为“一个”的含义；此外术语“所述”应理解为既包括单数形式也包括复数形式，除非上下文另外明确指出。此外术语“根据”应理解为“至少部分根据……”，术语“基于”应理解为“至少部分基于……”，除非上下文另外明确指出。
在本发明实施例中，术语“通信网络”或“无线通信网络”可以指符合如下任意通信标准的网络，例如长期演进(LTE，Long Term Evolution)、增强的长期演进(LTE-A，LTE-Advanced)、宽带码分多址接入(WCDMA，Wideband Code Division Multiple Access)、高速报文接入(HSPA，High-Speed Packet Access)等等。
并且，通信系统中设备之间的通信可以根据任意阶段的通信协议进行，例如可以包括但不限于如下通信协议：1G(generation)、2G、2.5G、2.75G、3G、4G、4.5G以及5G、新无线(NR，New Radio)等等，和/或其他目前已知或未来将被开发的通信协议。
在本发明实施例中，术语“网络设备”例如是指通信系统中将终端设备接入通信网络并为该终端设备提供服务的设备。网络设备可以包括但不限于如下设备：基站(BS，Base Station)、接入点(AP、Access Point)、发送接收点(TRP，Transmission Reception Point)、广播发射机、移动管理实体(MME、Mobile Management Entity)、网关、服务器、无线网络控制器(RNC，Radio Network Controller)、基站控制器(BSC，Base Station Controller)等等。
其中，基站可以包括但不限于：节点B(NodeB或NB)、演进节点B(eNodeB或eNB)以及5G基站(gNB)，等等，此外还可包括远端无线头(RRH，Remote Radio Head)、远端无线单元(RRU，Remote Radio Unit)、中继(relay)或者低功率节点(例如femeto、pico等等)。并且术语“基站”可以包括它们的一些或所有功能，每个基站可以对特定的地理区域提供通信覆盖。术语“小区”可以指的是基站和/或其覆盖区域，这取决于使用该术语的上下文。
在本发明实施例中，术语“用户设备”(UE，User Equipment)或者“终端设备”(TE，Terminal Equipment或Terminal Device)例如是指通过网络设备接入通信网络 并接收网络服务的设备。终端设备可以是固定的或移动的，并且也可以称为移动台(MS，Mobile Station)、终端、用户台(SS，Subscriber Station)、接入终端(AT，Access Terminal)、站，等等。
其中，终端设备可以包括但不限于如下设备：蜂窝电话(Cellular Phone)、个人数字助理(PDA，Personal Digital Assistant)、无线调制解调器、无线通信设备、手持设备、机器型通信设备、膝上型计算机、无绳电话、智能手机、智能手表、数字相机，等等。
再例如，在物联网(IoT，Internet of Things)等场景下，终端设备还可以是进行监控或测量的机器或装置，例如可以包括但不限于：机器类通信(MTC，Machine Type Communication)终端、车载通信终端、设备到设备(D2D，Device to Device)终端、机器到机器(M2M，Machine to Machine)终端，等等。
此外，术语“网络侧”或“网络设备侧”是指网络的一侧，可以是某一基站，也可以包括如上的一个或多个网络设备。术语“用户侧”或“终端侧”或“终端设备侧”是指用户或终端的一侧，可以是某一UE，也可以包括如上的一个或多个终端设备。
以下通过示例对本发明实施例的场景进行说明，但本发明不限于此。
图1是本发明实施例的通信系统的示意图，示意性说明了以终端设备和网络设备为例的情况，如图1所示，通信系统100可以包括网络设备101和终端设备102。为简单起见，图1仅以一个终端设备和一个网络设备为例进行说明，但本发明实施例不限于此。
在本发明实施例中，网络设备101和终端设备102之间可以进行现有的业务或者未来可实施的业务。例如，这些业务可以包括但不限于：增强的移动宽带(eMBB，enhanced Mobile Broadband)、大规模机器类型通信(mMTC，massive Machine Type Communication)和高可靠低时延通信(URLLC，Ultra-Reliable and Low-Latency Communication)，等等。
针对NR载波和LTE载波共存的情况，大致有如下部署方法：
例如，由于NR载波的范围较大，可以在其中预留一部分频域资源用作一个虚拟的LTE载波，MTC UE占据的PRB被限制在此虚拟LTE载波内；MTC UE例如使用6个PRB加上DC子载波(即6*12+1＝73个子载波)。
图2是将NR载波虚拟出的LTE载波中的一部分作为MTC载波的示意图，如图 2所示，在NR载波中可以虚拟出LTE载波，并且MTC载波(即MTC UE占据的PRB)可以位于该虚拟LTE载波中。对于LTE载波，由于其中心频点处具有DC子载波，并且该DC子载波没有被使用，在进行初始同步时，终端设备需要按照73个子载波进行同步信号检测。
再例如，使MTC UE直接工作在NR载波上；MTC UE例如使用6个PRB(即6*12＝72个子载波)。
图3是将NR载波中的一部分作为MTC载波的示意图，如图3所示，MTC载波(即MTC UE占据的PRB)可以位于该NR载波中。对于NR载波，由于其中心频点处没有DC子载波，或者该DC子载波被使用而与其他子载波相同或类似(即不区分DC子载波)，在进行初始同步时，终端设备需要按照72个子载波进行同步信号检测。
以下将以NR系统和/或LTE系统为例，对本发明实施例进行说明；但本发明不限于此，还可以适用于任何存在类似问题的系统或场景中。此外，本申请以MTC UE为例进行说明，但本发明不限于此，例如还可以是其他类型的终端设备。
实施例1
本发明实施例提供一种同步信号的检测方法。图4是本发明实施例的同步信号的检测方法的示意图，示出了终端设备侧的情况。如图4所示，该方法包括：
步骤401，终端设备接收来自网络设备的由多个子载波承载的信号；以及
步骤402，所述终端设备按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。
在本实施例中，所述多个子载波可以在NR系统中的NR载波上，或者所述多个子载波可以在LTE系统的LTE载波上，或者所述多个子载波可以在由所述NR系统基于所述NR载波虚拟出的LTE载波上；本发明不限于此。
在本实施例中，不具有或不区分DC子载波的频带例如是NR载波中的部分频域资源，可以包括72个子载波；但本发明不限于此，例如对于其他类型的UE，可以使用其他数量的子载波。此外，不具有或不区分DC子载波还可以包括这种情况：虽然DC子载波存在，但是该DC子载波被使用而与其他子载波相同或类似；即不区分DC子载波和非DC子载波的情况。
在本实施例中，具有或区分DC子载波的频带例如是LTE载波中的部分频域资源， 或者是NR载波虚拟出的LTE载波中的部分频域资源，可以包括73个子载波；但本发明不限于此，例如对于其他类型的UE，可以使用其他数量的子载波。
图5是本发明实施例的具有DC子载波的频带和不具有DC子载波的频带的示意图。如图5所示，具有DC子载波的频带例如包括73个子载波；不具有DC子载波的频带例如包括72个子载波。
值得注意的是，图5仅对本实施例进行了示例性说明，但本发明不限于此。例如载波中也可以存在DC子载波，但是DC子载波与其他子载波类似地被正常使用，即不区分DC子载波和非DC子载波，这种情况下的频带也包括72个子载波。
图6是本发明实施例的同步信号的检测和发送方法的示意图；从网络设备侧和终端设备侧进行进一步说明。如图6所示，该方法包括：
步骤601，网络设备将同步信号映射到多个子载波上。
例如，以NR载波为例，当基站按照LTE系统的PSS/SSS的映射方式，在NR载波上发送PSS/SSS时，由于NR载波上不具有DC子载波或者不区分DC子载波，可以不对DC子载波做预留处理，则承载同步信号的子载波个数为72。
即，同步信号可以被映射到由所述72个子载波(没有DC子载波，或者不区分DC子载波和非DC子载波)组成的6个PRB上，所述6个PRB的中心频点位于终端设备的检测栅格(raster)中。所述6个PRB的中心频点可以是NR载波的中心频点，也可以不是NR载波的中心频点；即PSS/SSS不必限制在中心频点附近的6个PRB上，而是可以位于频带上其它位置的6个PRB，只要这6个PRB的中心频点在终端设备的检测栅格上即可。
再例如，以LTE载波或者NR载波虚拟出的LTE载波为例，当基站按照LTE的PSS/SSS的映射方式，在LTE载波或NR载波中虚拟出的LTE载波上发送PSS/SSS时，由于LTE载波上具有或区分DC子载波，则承载同步信号的子载波个数为73。
即，同步信号被映射到由所述73个子载波中的72个子载波组成的6个PRB上，所述6个PRB的中心频点位于终端设备的检测栅格中。所述6个PRB的中心频带位置的子载波为所述DC子载波；所述6个PRB的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。
例如，中心频点的DC子载波不发送数据，同步信号将被映射到对应时刻的DC子载波两侧的子载波所对应的资源粒子(RE，Resource Element)上进行发送，承载 同步信号的RE个数为72，再加上空余的DC子载波，则进行同步检测的频带包括73个子载波。
步骤602，网络设备向终端设备发送由所述多个子载波承载的信号。
步骤603，终端设备按照不具有或不区分DC子载波的频带和/或按照具有或区分DC子载波的频带进行同步信号检测。
在本实施例中，终端设备具有例如对73个子载波和72个子载波进行同步信号检测的能力，即同步信号检测的能力被增强。在进行初始同步信号检测时，由于没有先验信息，则需要对两种模式的初始同步信号(例如是72个子载波还是73个子载波)进行盲检测。
值得注意的是，以上附图4和6仅对本发明实施例进行了示意性说明，但本发明不限于此。例如可以适当地调整各个步骤之间的执行顺序，此外还可以增加其他的一些步骤或者减少其中的某些步骤。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图4和6的记载。
在本实施例中，终端设备还可以检测所述信号的子载波间隔。例如，当MTC UE按照72个子载波进行检测时，需要对可能的子载波间隔大小进行检测，例如确定子载波间隔是15kHz还是30kHz。
在本实施例中，对于两种模式的初始同步信号(例如是72个子载波还是73个子载波)，可以有相应的优先级设置。
在一个实施方式中，在所述终端设备按照所述不具有或不区分DC子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，所述终端设备按照所述具有或区分DC子载波的频带对所述信号进行同步信号检测。
即，在工作频带内可以首先按照72个子载波进行同步信号检测(对应NR载波)，如果没有同步成功，再按照73个子载波进行同步信号检测(对应LTE载波或NR载波中虚拟的LTE载波)。
在另一个实施方式中，在所述终端设备按照所述具有或区分DC子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，所述终端设备按照所述不具有或不区分DC子载波的频带对所述信号进行同步信号检测。
即，在工作频带内可以首先按照73个子载波进行同步信号检测(对应LTE载波或NR载波中虚拟的LTE载波)，如果没有同步成功，再按照72个子载波进行同步信 号检测(对应NR载波)。
值得注意的是，以上各个实施方式仅对本发明实施例进行了示例性说明，但本发明不限于此，还可以在以上各个实施方式的基础上进行适当的变型。例如，可以单独使用上述各个实施方式，也可以将以上各个实施方式中的一种或多种结合起来。
由上述实施例可知，终端设备接收来自网络设备的由多个子载波承载的信号；以及按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。由此，既考虑到具有或区分DC子载波的情况又考虑到不具有或不区分DC子载波的情况，在NR载波和LTE载波共存的情况下也能够准确地进行同步信号检测。
实施例2
本发明实施例提供一种同步信号的发送方法，与实施例1相同的内容不再赘述。
图7是本发明实施例的同步信号的发送方法的示意图，示出了网络设备侧的情况。如图7所示，该方法包括：
步骤701，网络设备将同步信号映射到多个子载波上；以及
步骤702，网络设备向终端设备发送由所述多个子载波承载的信号；其中所述信号被所述终端设备用于按照不具有或不区分DC子载波的频带和/或按照具有或区分DC子载波的频带进行同步信号检测。
在本实施例中，所述多个子载波在NR系统中的NR载波上，或者所述多个子载波在LTE系统中的LTE载波上，或者所述多个子载波在由所述NR系统基于所述NR载波虚拟出的LTE载波上。
值得注意的是，以上附图7仅对本发明实施例进行了示意性说明，但本发明不限于此。例如可以适当地调整各个步骤之间的执行顺序，此外还可以增加其他的一些步骤或者减少其中的某些步骤。本领域的技术人员可以根据上述内容进行适当地变型，而不仅限于上述附图7的记载。
在一个实施方式中，所述不具有或不区分DC子载波的频带包括72个子载波，所述同步信号被映射到由所述72个子载波组成的6个PRB上，所述6个PRB的中心频点位于所述终端设备的检测栅格中。其中，所述6个PRB的中心频点可以是NR载波的中心频点，也可以不是NR载波的中心频点。
在另一个实施方式中，所述具有或区分DC子载波的频带包括73个子载波，所述同步信号被映射到由所述73个子载波中的72个子载波组成的6个PRB上，所述6个PRB的中心频点位于所述终端设备的检测栅格中。其中，所述6个PRB的中心频带位置的子载波为所述DC子载波；所述6个PRB的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。
由上述实施例可知，终端设备接收来自网络设备的由多个子载波承载的信号；以及按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。由此，既考虑到具有或区分DC子载波的情况又考虑到不具有或不区分DC子载波的情况，在NR载波和LTE载波共存的情况下也能够准确地进行同步信号检测。
实施例3
本发明实施例提供一种信息确定装置。该装置例如可以是终端设备，也可以是配置于终端设备的某个或某些部件或者组件。本实施例3与实施例1相同的内容不再赘述。
图8是本发明实施例的同步信号的检测装置的示意图，如图8所示，同步信号的检测装置800包括：
信号接收单元801，其接收来自网络设备的由多个子载波承载的信号；以及
同步检测单元802，其按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。
在本实施例中，所述多个子载波在NR系统中的NR载波上，或者所述多个子载波在LTE系统的LTE载波上，或者所述多个子载波在由所述NR系统基于所述NR载波虚拟出的LTE载波上。
如图8所示，同步信号的检测装置800还可以包括：
信息检测单元803，其检测所述信号的子载波间隔。
在一个实施方式中，所述不具有或不区分DC子载波的频带包括72个子载波，所述同步信号被映射到由所述72个子载波组成的6个PRB上，所述6个PRB的中心频点位于所述终端设备的检测栅格中。其中，所述6个PRB的中心频点可以是NR载波的中心频点，也可以不是NR载波的中心频点。
在另一个实施方式中，所述具有或区分DC子载波的频带包括73个子载波，所述同步信号被映射到由所述73个子载波中的72个子载波组成的6个PRB上，所述6个PRB的中心频点位于所述终端设备的检测栅格中。其中，所述6个PRB的中心频带位置的子载波为所述DC子载波；所述6个PRB的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。
在一个实施方式中，所述同步检测单元802还可以用于：在按照所述不具有或不区分DC子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，按照所述具有或区分DC子载波的频带对所述信号进行同步信号检测。
在另一个实施方式中，所述同步检测单元802还可以用于：在按照所述具有或区分DC子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，按照所述不具有或不区分DC子载波的频带对所述信号进行同步信号检测。
值得注意的是，以上仅对与本发明相关的各部件或模块进行了说明，但本发明不限于此。同步信号的检测装置800还可以包括其他部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
值得注意的是，以上各个实施方式仅对本发明实施例进行了示例性说明，但本发明不限于此，还可以在以上各个实施方式的基础上进行适当的变型。例如，可以单独使用上述各个实施方式，也可以将以上各个实施方式中的一种或多种结合起来。
此外，为了简单起见，图8中仅示例性示出了各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本发明实施并不对此进行限制。
由上述实施例可知，终端设备接收来自网络设备的由多个子载波承载的信号；以及按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。由此，既考虑到具有或区分DC子载波的情况又考虑到不具有或不区分DC子载波的情况，在NR载波和LTE载波共存的情况下也能够准确地进行同步信号检测。
实施例4
本发明实施例提供一种同步信号的发送装置。该装置例如可以是网络设备，也可 以是配置于网络设备的某个或某些部件或者组件。本实施例4与实施例2相同的内容不再赘述。
图9是本发明实施例的同步信号的发送装置的示意图，如图9所示，同步信号的发送装置900包括：
信号映射单元901，其将同步信号映射到多个子载波上；以及
信号发送单元902，其向终端设备发送由所述多个子载波承载的信号；其中所述信号被所述终端设备用于按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带进行同步信号检测。
在本实施例中，所述多个子载波在NR系统中的NR载波上，或者所述多个子载波在LTE系统的LTE载波上，或者所述多个子载波在由所述NR系统基于所述NR载波虚拟出的LTE载波上。
在一个实施方式中，所述不具有或不区分DC子载波的频带包括72个子载波，所述同步信号被映射到由所述72个子载波组成的6个PRB上，所述6个PRB的中心频点位于所述终端设备的检测栅格中。其中，所述6个PRB的中心频点可以是NR载波的中心频点，也可以不是NR载波的中心频点。
在另一个实施方式中，所述具有或区分DC子载波的频带包括73个子载波，所述同步信号被映射到由所述73个子载波中的72个子载波组成的6个PRB上，所述6个PRB的中心频点位于所述终端设备的检测栅格中。其中，所述6个PRB的中心频带位置的子载波为所述DC子载波；所述6个PRB的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。
值得注意的是，以上仅对与本发明相关的各部件或模块进行了说明，但本发明不限于此。同步信号的发送装置900还可以包括其他部件或者模块，关于这些部件或者模块的具体内容，可以参考相关技术。
此外，为了简单起见，图9中仅示例性示出各个部件或模块之间的连接关系或信号走向，但是本领域技术人员应该清楚的是，可以采用总线连接等各种相关技术。上述各个部件或模块可以通过例如处理器、存储器、发射机、接收机等硬件设施来实现；本发明实施并不对此进行限制。
由上述实施例可知，终端设备接收来自网络设备的由多个子载波承载的信号；以及按照不具有或不区分直流子载波的频带和/或按照具有直流或区分子载波的频带对 所述信号进行同步信号检测。由此，既考虑到具有或区分DC子载波的情况又考虑到不具有或不区分DC子载波的情况，在NR载波和LTE载波共存的情况下也能够准确地进行同步信号检测。
实施例5
本发明实施例还提供一种通信系统，可以参考图1，与实施例1至4相同的内容不再赘述。在本实施例中，通信系统100可以包括：
网络设备101，其配置有如实施例4所述的同步信号的发送装置900；
终端设备102，其配置有如实施例3所述的同步信号的检测装置800。
本发明实施例还提供一种网络设备，例如可以是基站，但本发明不限于此，还可以是其他的网络设备。
图10是本发明实施例的网络设备的构成示意图。如图10所示，网络设备1000可以包括：处理器1010(例如中央处理器CPU)和存储器1020；存储器1020耦合到处理器1010。其中该存储器1020可存储各种数据；此外还存储信息处理的程序1030，并且在处理器1010的控制下执行该程序1030。
例如，处理器1010可以被配置为执行程序1030而实现如实施例2所述的同步信号的发送方法。例如处理器1010可以被配置为进行如下的控制：将同步信号映射到多个子载波上；以及向终端设备发送由所述多个子载波承载的信号；其中所述信号被所述终端设备用于按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带进行同步信号检测。
此外，如图10所示，网络设备1000还可以包括：收发机1040和天线1050等；其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，网络设备1000也并不是必须要包括图10中所示的所有部件；此外，网络设备1000还可以包括图10中没有示出的部件，可以参考现有技术。
本发明实施例还提供一种终端设备，但本发明不限于此，还可以是其他的设备。
图11是本发明实施例的终端设备的示意图。如图11所示，该终端设备1100可以包括处理器1110和存储器1120；存储器1120存储有数据和程序，并耦合到处理器1110。值得注意的是，该图是示例性的；还可以使用其他类型的结构，来补充或代替该结构，以实现电信功能或其他功能。
例如，处理器1110可以被配置为执行程序而实现如实施例1所述的同步信号的检测方法。例如处理器1110可以被配置为进行如下的控制：接收来自网络设备的由多个子载波承载的信号；以及按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。
如图11所示，该终端设备1100还可以包括：通信模块1130、输入单元1140、显示器1150、电源1160。其中，上述部件的功能与现有技术类似，此处不再赘述。值得注意的是，终端设备1100也并不是必须要包括图11中所示的所有部件，上述部件并不是必需的；此外，终端设备1100还可以包括图11中没有示出的部件，可以参考现有技术。
本发明实施例还提供一种计算机可读程序，其中当在网络设备中执行所述程序时，所述程序使得所述网络设备执行实施例2所述的同步信号的发送方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得网络设备执行实施例2所述的同步信号的发送方法。
本发明实施例还提供一种计算机可读程序，其中当在终端设备中执行所述程序时，所述程序使得所述终端设备执行实施例1所述的同步信号的检测方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质，其中所述计算机可读程序使得终端设备执行实施例1所述的同步信号的检测方法。
本发明以上的装置和方法可以由硬件实现，也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序，当该程序被逻辑部件所执行时，能够使该逻辑部件实现上文所述的装置或构成部件，或使该逻辑部件实现上文所述的各种方法或步骤。本发明还涉及用于存储以上程序的存储介质，如硬盘、磁盘、光盘、DVD、flash存储器等。
结合本发明实施例描述的方法/装置可直接体现为硬件、由处理器执行的软件模块或二者组合。例如，图中所示的功能框图中的一个或多个和/或功能框图的一个或多个组合，既可以对应于计算机程序流程的各个软件模块，亦可以对应于各个硬件模块。这些软件模块，可以分别对应于图中所示的各个步骤。这些硬件模块例如可利用现场可编程门阵列(FPGA)将这些软件模块固化而实现。
软件模块可以位于RAM存储器、闪存、ROM存储器、EPROM存储器、EEPROM存储器、寄存器、硬盘、移动磁盘、CD-ROM或者本领域已知的任何其它形式的存 储介质。可以将一种存储介质耦接至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息；或者该存储介质可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。该软件模块可以存储在移动终端的存储器中，也可以存储在可插入移动终端的存储卡中。例如，若设备(如移动终端)采用的是较大容量的MEGA-SIM卡或者大容量的闪存装置，则该软件模块可存储在该MEGA-SIM卡或者大容量的闪存装置中。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，可以实现为用于执行本发明所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合，还可以实现为计算设备的组合，例如，DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述，但本领域技术人员应该清楚，这些描述都是示例性的，并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的精神和原理对本发明做出各种变型和修改，这些变型和修改也在本发明的范围内。
关于包括以上实施例的实施方式，还公开下述的附记：
附记1、一种同步信号的检测方法，包括：
终端设备接收来自网络设备的由多个子载波承载的信号；以及
所述终端设备按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。
附记2、根据附记1所述的方法，其中，所述多个子载波在新无线(NR)系统中的NR载波上，或者所述多个子载波在长期演进(LTE)系统的LTE载波上，或者所述多个子载波在由所述NR系统基于所述NR载波虚拟出的LTE载波上。
附记3、根据附记1或2所述的方法，其中，所述方法还包括：
所述终端设备检测所述信号的子载波间隔。
附记4、根据附记1至3任一项所述的方法，其中，所述不具有或不区分直流子载波的频带包括72个子载波。
附记5、根据附记4所述的方法，其中，同步信号被映射到由所述72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
附记6、根据附记5所述的方法，其中，所述6个物理资源块的中心频点是NR载波的中心频点。
附记7、根据附记5所述的方法，其中，所述6个物理资源块的中心频点不是NR载波的中心频点。
附记8、根据附记1至3任一项所述的方法，其中，所述具有或区分直流子载波的频带包括73个子载波。
附记9、根据附记8所述的方法，其中，同步信号被映射到由所述73个子载波中的72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
附记10、根据附记9所述的方法，其中，所述6个物理资源块的中心频带位置的子载波为所述直流子载波；所述6个物理资源块的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。
附记11、根据附记1至10任一项所述的方法，其中，所述方法还包括：
在所述终端设备按照所述不具有或不区分直流子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，所述终端设备按照所述具有或区分直流子载波的频带对所述信号进行同步信号检测。
附记12、根据附记1至10任一项所述的方法，其中，所述方法还包括：
在所述终端设备按照所述具有或区分直流子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，所述终端设备按照所述不具有或不区分直流子载波的频带对所述信号进行同步信号检测。
附记13、一种同步信号的发送方法，包括：
网络设备将同步信号映射到多个子载波上；以及
所述网络设备向终端设备发送由所述多个子载波承载的信号；其中所述信号被所述终端设备用于按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带进行同步信号检测。
附记14、根据附记13所述的方法，其中，所述多个子载波在新无线(NR)系统 中的NR载波上，或者所述多个子载波在长期演进(LTE)系统中的LTE载波上，或者所述多个子载波在由所述NR系统基于所述NR载波虚拟出的LTE载波上。
附记15、根据附记13或14所述的方法，其中，所述不具有或不区分直流子载波的频带包括72个子载波。
附记16、根据附记15所述的方法，其中，所述同步信号被映射到由所述72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
附记17、根据附记16所述的方法，其中，所述6个物理资源块的中心频点是NR载波的中心频点，或者，所述6个物理资源块的中心频点不是NR载波的中心频点。
附记18、根据附记13或14所述的方法，其中，所述具有或区分直流子载波的频带包括73个子载波。
附记19、根据附记18所述的方法，其中，所述同步信号被映射到由所述73个子载波中的72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
附记20、根据附记19所述的方法，其中，所述6个物理资源块的中心频带位置的子载波为所述直流子载波；所述6个物理资源块的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。

Claims (20)

  1. 一种同步信号的检测装置，包括：
    信号接收单元，其接收来自网络设备的由多个子载波承载的信号；以及
    同步检测单元，其按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带对所述信号进行同步信号检测。
  2. 根据权利要求1所述的装置，其中，所述多个子载波在新无线(NR)系统中的NR载波上，或者所述多个子载波在长期演进(LTE)系统的LTE载波上，或者所述多个子载波在由所述NR系统基于所述NR载波虚拟出的LTE载波上。
  3. 根据权利要求1所述的装置，其中，所述装置还包括：
    信息检测单元，其检测所述信号的子载波间隔。
  4. 根据权利要求1所述的装置，其中，所述不具有或不区分直流子载波的频带包括72个子载波。
  5. 根据权利要求4所述的装置，其中，同步信号被映射到由所述72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
  6. 根据权利要求5所述的装置，其中，所述6个物理资源块的中心频点是NR载波的中心频点，或者，所述6个物理资源块的中心频点不是NR载波的中心频点。
  7. 根据权利要求1所述的装置，其中，所述具有或区分直流子载波的频带包括73个子载波。
  8. 根据权利要求7所述的装置，其中，同步信号被映射到由所述73个子载波中的72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
  9. 根据权利要求8所述的装置，其中，所述6个物理资源块的中心频带位置的子载波为所述直流子载波；所述6个物理资源块的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。
  10. 根据权利要求1所述的装置，其中，所述同步检测单元还用于：在按照所述不具有或不区分直流子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，按照所述具有或区分直流子载波的频带对所述信号进行同步信号检测。
  11. 根据权利要求1所述的方法，其中，所述同步检测单元还用于：在按照所述具有或区分直流子载波的频带对所述信号没有成功进行所述同步信号检测的情况下，按照所述不具有或不区分直流子载波的频带对所述信号进行同步信号检测。
  12. 一种同步信号的发送装置，包括：
    信号映射单元，其将同步信号映射到多个子载波上；以及
    信号发送单元，其向终端设备发送由所述多个子载波承载的信号；其中所述信号被所述终端设备用于按照不具有或不区分直流子载波的频带和/或按照具有或区分直流子载波的频带进行同步信号检测。
  13. 根据权利要求12所述的装置，其中，所述多个子载波在新无线(NR)系统中的NR载波上，或者所述多个子载波在长期演进(LTE)系统中的LTE载波上，或者所述多个子载波在由所述NR系统基于所述NR载波虚拟出的LTE载波上。
  14. 根据权利要求12所述的装置，其中，所述不具有或不区分直流子载波的频带包括72个子载波。
  15. 根据权利要求14所述的装置，其中，所述同步信号被映射到由所述72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
  16. 根据权利要求15所述的装置，其中，所述6个物理资源块的中心频点是NR载波的中心频点，或者，所述6个物理资源块的中心频点不是NR载波的中心频点。
  17. 根据权利要求12所述的装置，其中，所述具有或区分直流子载波的频带包括73个子载波。
  18. 根据权利要求17所述的装置，其中，所述同步信号被映射到由所述73个子载波中的72个子载波组成的6个物理资源块上，所述6个物理资源块的中心频点位于所述终端设备的检测栅格中。
  19. 根据权利要求18所述的装置，其中，所述6个物理资源块的中心频带位置的子载波为所述直流子载波；所述6个物理资源块的中心频点是LTE载波的中心频点或者是由NR载波虚拟出的LTE载波的中心频点。
  20. 一种通信系统，包括：
    终端设备，其包括如权利要求1所述的同步信号的检测装置；以及
    网络设备，其包括如权利要求12所述的同步信号的发送装置。
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