WO2021032134A1 - 同步信号传输方法及通信装置 - Google Patents

同步信号传输方法及通信装置 Download PDF

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Publication number
WO2021032134A1
WO2021032134A1 PCT/CN2020/110089 CN2020110089W WO2021032134A1 WO 2021032134 A1 WO2021032134 A1 WO 2021032134A1 CN 2020110089 W CN2020110089 W CN 2020110089W WO 2021032134 A1 WO2021032134 A1 WO 2021032134A1
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WIPO (PCT)
Prior art keywords
sequence
time
time unit
synchronization signal
complex number
Prior art date
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PCT/CN2020/110089
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English (en)
French (fr)
Inventor
郑娟
李超君
汲桐
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20853840.5A priority Critical patent/EP3993291A4/en
Publication of WO2021032134A1 publication Critical patent/WO2021032134A1/zh
Priority to US17/585,159 priority patent/US20220150853A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0638—Clock or time synchronisation among nodes; Internode synchronisation
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0602—Systems characterised by the synchronising information used
    • H04J3/0605—Special codes used as synchronising signal
    • H04J3/0608—Detectors therefor, e.g. correlators, state machines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • This application relates to the field of communication technology, and in particular to a synchronization signal transmission method and communication device.
  • terminal equipment needs to be synchronized before establishing a data transmission channel with network equipment. That is, the terminal device needs to synchronize with the network device based on the synchronization signal sent by the network device. In the synchronization process, it is necessary to reduce the synchronization time between the terminal device and the network device as much as possible to avoid the terminal device from continuously receiving synchronization signals sent by the network device, thereby increasing the power consumption of the terminal device.
  • the correlation processing result of the sequence in the synchronization signal is a sequence composed of +1 and -1. Since the autocorrelation characteristics of the sequence composed of +1 and -1 are not good, the correlation peak is not steep enough when the correlation processing result is correlated with the local sequence. That is, the correlation peak value obtained by the terminal device has a glitch phenomenon, which results in a long time required for the terminal device to synchronize with the network device.
  • the present application provides a synchronization signal transmission method and communication device, which is beneficial to realize rapid synchronization.
  • this application provides a synchronization signal transmission method.
  • the synchronization signal includes a first sequence and a second sequence.
  • the first time unit that carries the first sequence is different from the second time unit that carries the second sequence; and, the first sequence is the first complex sequence or the sequence obtained based on the first complex sequence; the second sequence is based on the second sequence
  • the sequence obtained by the plural sequence is different from the first sequence.
  • the correlation processing result between the first sequence and the second sequence is a complex sequence. Therefore, when the network device sends the synchronization signal to the terminal device, the terminal device can synchronize with the network device according to the synchronization signal. Obtain sharper correlation peaks. Therefore, it is beneficial to save the time required for synchronization and realize fast synchronization.
  • the first time unit carrying the first sequence may be understood as the time unit corresponding to the first sequence sent by the network device, that is, the network device sends the first sequence on the first time unit.
  • the second time unit carrying the second sequence can also be understood as the network device sending the second sequence on the second time unit.
  • the correlation operation used to calculate the correlation processing result between the first sequence and the second sequence is an operation between corresponding elements between the two sequences.
  • the correlation processing result between the first sequence and the second sequence is: a sequence obtained after dot multiplication, dot division, conjugate dot multiplication, or conjugate dot division of corresponding elements between the first sequence and the second sequence.
  • the first sequence is a sequence obtained based on the first complex number sequence and a first calculation rule; the second sequence is obtained based on the first complex number sequence and the first calculation rule
  • the sequence of; the first calculation rule includes any one of the point product rule, the conjugate point product rule, and the conjugate point division rule.
  • the first calculation rule is also the operation between corresponding elements between the two sequences.
  • the first complex sequence is a ZC sequence; or, the first complex sequence is an inverse fast Fourier transform IFFT or fast Fourier transform of the ZC sequence, or m sequence, or Gold sequence.
  • the inner leaf changes the sequence obtained by FFT.
  • the first sequence is a first complex number sequence or a sequence obtained based on the first complex number sequence and a first calculation rule.
  • the second sequence is obtained by performing the first calculation rule on the first sequence and the first complex number sequence.
  • the second time unit is a time unit adjacent to the first time unit. In this way, this implementation manner may start with the first time unit, and sequentially determine the sequence carried on each adjacent time unit.
  • the first time unit is the first time unit, the last time unit, or a certain time unit in the resources occupied by the synchronization signal in the time domain. In this way, the sequence carried on other time units can be based on this implementation.
  • the first time unit is the start, which is determined sequentially.
  • the network device sends the synchronization signal described in this embodiment, so that the terminal device can select any sequence carried on any adjacent time unit to perform correlation operations, and the obtained correlation processing result is a complex sequence. Furthermore, the terminal performs a correlation operation with the local sequence based on the correlation processing result to obtain a sharp correlation peak, which is beneficial to shorten the time required for synchronization.
  • adjacent time units can be understood as two adjacent time units in the time domain. Two adjacent time units can be continuous or discontinuous in the time domain.
  • the N time units are divided into at least two time unit groups.
  • the division manner of the at least two time unit groups can be grouped in a manner pre-defined by a protocol or a radio resource control RRC configuration.
  • the at least two time unit groups include a first time unit group and a second time unit group.
  • the first time unit is any time unit in the first time unit group;
  • the second time unit is any time unit in the second time unit group.
  • the network device sends the synchronization signal described in this embodiment, so that the terminal device can select a sequence carried on a time unit from two time unit groups to perform correlation operations, and the correlation processing result obtained is a complex sequence.
  • the terminal performs a correlation operation with the local sequence based on the correlation processing result to obtain a sharp correlation peak, which is beneficial to shorten the time required for synchronization.
  • the first time unit group is composed of time units numbered odd in N time units.
  • the second time unit group is composed of time units numbered as even numbers among N time units.
  • the number refers to the sequence of the time unit in the N time units.
  • the number of a time unit refers to the sequence of the time unit among the N time units arranged based on the sequence in the time domain. That is, the serial number of the time unit can be represented by the relative serial number of the time unit in the time unit included in the synchronization signal.
  • the serial number of the time unit may also be represented by the absolute serial number of the time unit on the radio resource. For example, assuming that the time unit is 1 symbol, the number of the time unit may be represented by the absolute number of the time unit in 1 time slot, 1 subframe, or 1 radio frame.
  • the resources occupied by the synchronization signal in the time domain include N time units; the first time unit group is composed of L time units before the time domain.
  • the second time unit group is composed of NL time units that are later in the time domain among the N time units; the N is an integer greater than or equal to 2; the L is or
  • the resources occupied by the synchronization signal in the time domain include N time units; the first time unit is located before the second time unit in the time domain.
  • the first sequence carried on the first time unit has the following three situations.
  • the first sequence when the number M1 of the first time unit in the N time units is equal to 1, the first sequence is the first complex sequence.
  • the first sequence when the number M1 of the first time unit in the N time units is greater than 1, the first sequence is obtained based on the first calculation rule and M1 of the first complex number sequences sequence.
  • the first sequence when the number M1 of the first time unit in the N time units is equal to 1, the first sequence is the first complex sequence; and the first time unit is in the N
  • the first sequence is a sequence obtained based on the first calculation rule and the M1 first complex number sequences.
  • the second sequence is a sequence obtained based on the first calculation rule and M2 of the first complex number sequences
  • the M2 is the number of the second time unit in the N time units
  • the number of the time unit can also have the above two interpretations, which will not be detailed here.
  • the network device sending the synchronization signal described in this embodiment can also enable the terminal device to select the sequence carried on the adjacent time unit to perform the correlation operation, and the obtained correlation processing result is a complex sequence.
  • the terminal performs a correlation operation with the local sequence based on the correlation processing result to obtain a sharp correlation peak, which is beneficial to shorten the time required for synchronization.
  • the N time units are divided into at least two time unit groups.
  • the division manner of the at least two time unit groups may be grouping in a protocol predefined or signaling configuration manner (for example, the grouping information is indicated by high-level signaling and/or downlink control information).
  • the high-level signaling may be radio resource control (Radio Resource Control, RRC) signaling, and Media Access Control (Media Access Control, MAC) signaling.
  • the downlink control information may be information carried in the downlink control channel.
  • the sequence carried on each time unit of each time unit group may have a sequence pattern of the synchronization signal described in any of the foregoing embodiments. That is, the N time units can be divided into at least two time unit groups, and each time unit group can independently use any one of the above-mentioned embodiments to determine the sequence carried on each time unit in the time unit group. .
  • the implementation manners adopted between the time unit groups may be the same or different.
  • the terminal device when the channel condition is good, can synchronize with the network device based on the sequence carried by the time unit in a time unit group; if the channel condition is not good, it can perform multiple times based on multiple time unit groups. Synchronous processing. It can be seen that this embodiment can improve the reliability of synchronization signal transmission.
  • the time domain resources occupied by different time unit groups may also be continuous or discontinuous.
  • the network device may send multiple synchronization signals, and the time domain resources occupied by the synchronization signals may be continuous or discontinuous.
  • the implementation manner adopted by each synchronization signal can be any of the foregoing.
  • the pattern sequence used between the two synchronization signals can be the same or different.
  • the resources occupied by the synchronization signal in the time domain are N+K time units.
  • the sequence carried on each time unit can be determined by any of the above-mentioned implementation manners.
  • the sequence carried on K time units is not limited in the embodiment of the present application.
  • the terminal can still be able to make the terminal according to the part of the time unit.
  • the bearer sequence the obtained correlation processing result is a complex sequence. Furthermore, a sharp correlation peak can be obtained.
  • the embodiment of the present application does not limit the sequence carried on other time units in the resources occupied by the synchronization signal in the time domain.
  • this application also provides a synchronization signal transmission method.
  • the network device generates and transmits the synchronization signal.
  • the synchronization signal may include a constant sequence and a first sequence, and the first time unit carrying the first sequence is different from the second time unit carrying the constant sequence.
  • the first sequence may be a first complex number sequence or a sequence obtained based on the first complex number sequence.
  • the correlation processing result between the constant sequence and the first sequence is a complex sequence. Therefore, the synchronization signal transmission method described in this aspect can also obtain a sharper correlation peak. This helps to save the time required for synchronization and achieve fast synchronization.
  • the constant sequence can be understood as a sequence in which the sequence elements are all real numbers.
  • the absolute values of the sequence elements included in the constant sequence are all equal.
  • this application also provides a synchronization signal transmission method.
  • the synchronization signal transmission method is explained from the perspective of terminal equipment.
  • the terminal device can receive the synchronization signal from the network device.
  • the synchronization signal includes a first sequence and a second sequence.
  • the first time unit that carries the first sequence is different from the second time unit that carries the second sequence; the first sequence is a first complex sequence or is based on The sequence obtained by the first complex number sequence; the second sequence is a sequence obtained based on the first complex number sequence; the first sequence is different from the second sequence, and the first sequence and the first sequence
  • the correlation processing result between the two sequences is a complex number sequence. Therefore, when the terminal device synchronizes with the network device, it can obtain a sharp correlation peak based on the correlation processing result, which is beneficial to shorten the time required for synchronization.
  • the related content of the first sequence, the second sequence, and various optional implementation manners of the synchronization signal can be referred to the related content of the above-mentioned first aspect, which will not be detailed here.
  • this application also provides a synchronization signal transmission method.
  • the terminal device receives the synchronization signal from the network device, and synchronizes with the network device according to the synchronization signal.
  • the synchronization signal may include a constant sequence and a first sequence.
  • the first time unit carrying the first sequence is different from the second time unit carrying the constant sequence.
  • the first sequence may be a first complex number sequence or a sequence obtained based on the first complex number sequence.
  • the correlation processing result between the constant sequence and the first sequence is a complex sequence. Therefore, the synchronization signal transmission method described in this aspect can also obtain a sharper correlation peak. This helps to save the time required for synchronization and achieve fast synchronization.
  • the relevant content of the first complex number sequence can be referred to the relevant description of the above-mentioned first aspect, which will not be detailed here.
  • this application also provides a communication device.
  • the communication device has part or all of the functions of the network device described in any one of the first aspect to the second aspect.
  • the function of the device may have the function of some or all of the embodiments of the network device in the present application, or may have the function of independently implementing any of the embodiments of the present application.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above-mentioned functions.
  • the structure of the communication device may include a processing unit and a communication unit, and the processing unit is configured to support the communication device to perform corresponding functions in the foregoing method.
  • the communication unit is used to support communication between the communication device and other devices.
  • the communication device may further include a storage unit for coupling with the processing unit and the communication unit, which stores program instructions and data necessary for the communication device.
  • the communication device includes:
  • a processing unit configured to generate a synchronization signal, the synchronization signal including a first sequence and a second sequence
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence;
  • the first sequence is a first complex sequence or a sequence obtained based on the first complex sequence;
  • the second sequence is a sequence obtained based on the first complex number sequence;
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the first sequence is a sequence obtained based on the first complex number sequence and a first calculation rule; the second sequence is obtained based on the first complex number sequence and the first calculation rule Sequence;
  • the first calculation rule includes any one of a dot product rule, a conjugate point product rule, and a conjugate point division rule.
  • the resources occupied by the synchronization signal in the time domain include a first time unit group and a second time unit group; the first time unit is any time unit in the first time unit group ; The second time unit is any time unit in the second time unit group.
  • the resources occupied by the synchronization signal in the time domain include N time units; the N is an integer greater than or equal to 2; the first time unit group is composed of N time units , The time unit numbered as an odd number is constituted; the second time unit group is constituted by the time unit numbered as an even number among the N time units.
  • the resources occupied by the synchronization signal in the time domain include N time units; the first time unit group is composed of L time units that are first in the time domain among the N time units The second time unit group is made up of NL time units following the time domain among the N time units; the N is an integer greater than or equal to 2; the L is or
  • the resources occupied by the synchronization signal in the time domain include N time units; the first time unit is located before the second time unit in the time domain; and the first time unit is When the number M1 of the N time units is equal to 1, the first sequence is the first complex number sequence; or, when the number M1 of the first time unit in the N time units is greater than 1,
  • the first sequence is a sequence obtained based on the first calculation rule and M1 of the first complex sequence; the second sequence is obtained based on the first calculation rule and M2 of the first complex sequence Sequence, the M2 is the number of the second time unit in the N time units, and the M2 is an integer greater than 1.
  • the second sequence is obtained by performing the first calculation rule on the first sequence and the first complex sequence; the second time unit is the same as the first time unit The adjacent time unit.
  • the first complex sequence is a ZC sequence; or, the first complex sequence is an inverse fast Fourier transform IFFT or fast Fourier transform of the ZC sequence, or m sequence, or Gold sequence.
  • the communication unit may be a transceiver or a communication interface
  • the storage unit may be a memory
  • the processing unit may be a processor
  • the communication device includes:
  • a processor configured to generate a synchronization signal, the synchronization signal including a first sequence and a second sequence
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence;
  • the first sequence is a first complex sequence or a sequence obtained based on the first complex sequence;
  • the second sequence is a sequence obtained based on the first complex number sequence;
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the related content of the first sequence, the second sequence, and various optional implementation manners of the synchronization signal can be referred to the related content of the above-mentioned first aspect, which will not be detailed here.
  • the processor can be used to perform, for example, but not limited to, baseband related processing
  • the transceiver can be used to perform, for example, but not limited to, radio frequency transceiving.
  • the above-mentioned devices may be respectively arranged on independent chips, or at least partly or fully arranged on the same chip.
  • the processor can be further divided into an analog baseband processor and a digital baseband processor.
  • the analog baseband processor can be integrated with the transceiver on the same chip, and the digital baseband processor can be set on a separate chip. With the continuous development of integrated circuit technology, more and more devices can be integrated on the same chip.
  • a digital baseband processor can be integrated with a variety of application processors (such as but not limited to graphics processors, multimedia processors, etc.) on the same chip.
  • application processors such as but not limited to graphics processors, multimedia processors, etc.
  • Such a chip can be called a system chip (System on Chip). Whether each device is installed independently on different chips or integrated on one or more chips often depends on the needs of product design.
  • the embodiment of the present application does not limit the implementation form of the foregoing device.
  • this application also provides a communication device.
  • the communication device has part or all of the functions of the terminal in the method example described in any one of the third aspect to the fourth aspect.
  • the function of the communication device may have some or all of the functions in the embodiments of the present application, or may have the function of independently implementing any of the embodiments of the present application.
  • the function can be realized by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above-mentioned functions.
  • the structure of the communication device may include a processing unit and a communication unit, and the processing unit is configured to support the communication device to perform corresponding functions in the foregoing method.
  • the communication unit is used to support communication between the communication device and other devices.
  • the communication device may further include a storage unit for coupling with the processing unit and the sending unit, which stores program instructions and data necessary for the communication device.
  • the communication device includes:
  • the communication unit is used to receive synchronization signals from network equipment
  • a processing unit configured to synchronize with the network device according to the synchronization signal
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence
  • the first sequence is a first complex number sequence or a sequence obtained based on the first complex number sequence
  • the second sequence is a sequence obtained based on the first complex number sequence
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the first sequence is a sequence obtained based on the first complex number sequence and the first calculation rule;
  • the second sequence is a sequence obtained based on the first complex number sequence and the first calculation rule;
  • the first calculation rule includes the dot product rule Any one of conjugate point multiplication rule and conjugate point division rule.
  • the resources occupied by the synchronization signal in the time domain include a first time unit group and a second time unit group; the first time unit is any time unit in the first time unit group ; The second time unit is any time unit in the second time unit group.
  • the resources occupied by the synchronization signal in the time domain include N time units; the N is an integer greater than or equal to 2; the first time unit group is composed of N time units , The time unit numbered as an odd number is constituted; the second time unit group is constituted by the time unit numbered as an even number among the N time units.
  • the resources occupied by the synchronization signal in the time domain include N time units; the first time unit group is composed of L time units that are first in the time domain among the N time units The second time unit group is made up of NL time units following the time domain among the N time units; the N is an integer greater than or equal to 2; the L is or
  • the resources occupied by the synchronization signal in the time domain include N time units; the first time unit is located before the second time unit in the time domain; and the first time unit is When the number M1 of the N time units is equal to 1, the first sequence is the first complex number sequence; or, when the number M1 of the first time unit in the N time units is greater than 1,
  • the first sequence is a sequence obtained based on the first calculation rule and M1 of the first complex sequence; the second sequence is obtained based on the first calculation rule and M2 of the first complex sequence Sequence, the M2 is the number of the second time unit in the N time units, and the M2 is an integer greater than 1.
  • the second sequence is obtained by performing the first calculation rule on the first sequence and the first complex sequence; the second time unit is the same as the first time unit The adjacent time unit.
  • the first complex sequence is a ZC sequence; or, the first complex sequence is an inverse fast Fourier transform IFFT or fast Fourier transform of the ZC sequence, or m sequence, or Gold sequence.
  • the processing unit may be a processor
  • the communication unit may be a transceiver or a communication interface
  • the storage unit may be a memory.
  • the communication device includes:
  • Transceiver used to receive synchronization signals from network equipment
  • a processor configured to synchronize with the network device according to the synchronization signal
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence
  • the first sequence is a first complex number sequence or a sequence obtained based on the first complex number sequence
  • the second sequence is a sequence obtained based on the first complex number sequence
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the related content of the first sequence, the second sequence, and various optional implementation manners of the synchronization signal can be referred to the related content of the above-mentioned first aspect, which will not be detailed here.
  • the present application also provides a processor, configured to execute the foregoing various methods.
  • the processes of sending and receiving the above information in the above methods can be understood as the process of outputting the above information by the processor and the process of receiving the inputted information.
  • the processor When outputting the above information, the processor outputs the above information to the transceiver for transmission by the transceiver. After the above-mentioned information is output by the processor, other processing may be required before it reaches the transceiver.
  • the processor receives the aforementioned information input, the transceiver receives the aforementioned information and inputs it into the processor. Furthermore, after the transceiver receives the above-mentioned information, the above-mentioned information may need to undergo other processing before being input to the processor.
  • the sending synchronization signal mentioned in the foregoing method can be understood as the processor outputting the synchronization signal.
  • receiving the synchronization signal can be understood as the processor receiving the input synchronization signal.
  • processor output and Operations such as receiving and inputting, rather than transmitting, sending and receiving operations directly performed by radio frequency circuits and antennas.
  • the foregoing processor may be a processor dedicated to executing these methods, or a processor that executes computer instructions in a memory to execute these methods, such as a general-purpose processor.
  • the above-mentioned memory may be a non-transitory (non-transitory) memory, such as a read-only memory (Read Only Memory, ROM), which can be integrated with the processor on the same chip, or can be set on different chips.
  • ROM read-only memory
  • the embodiment does not limit the type of the memory and the setting mode of the memory and the processor.
  • the present application also provides a communication system, which includes at least one terminal device and at least one network device of the foregoing aspect.
  • the system may also include other devices that interact with terminals or network devices in the solution provided in this application.
  • the present application provides a computer-readable storage medium for storing computer software instructions.
  • the instructions are executed by a communication device, the method described in any one of the third to fourth aspects is implemented.
  • the present application provides a computer-readable storage medium for storing computer software instructions.
  • the instructions When the instructions are executed by a communication device, the communication device implements the method described in the first or second aspect.
  • the present application also provides a computer program product including instructions that, when run on a communication device, cause the communication device to execute the method described in the first or second aspect.
  • this application also provides a computer program product including instructions, which when run on a communication device, cause the communication device to execute the method described in the third or fourth aspect.
  • this application provides a chip system that includes a processor and an interface, the interface is used to obtain a program or instruction, and the processor is used to call the program or instruction to implement or support a network device
  • the function involved in any aspect of the first aspect to the second aspect is realized, for example, at least one of the data and information involved in the above method is determined or processed.
  • the chip system further includes a memory, and the memory is used to store necessary program instructions and data of the network device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • this application provides a chip system that includes a processor and an interface, the interface is used to obtain a program or instruction, and the processor is used to call the program or instruction to implement or support a terminal device Realize the functions involved in the third aspect to the fourth aspect, for example, determine or process at least one of the data and information involved in the foregoing method.
  • the chip system further includes a memory, and the memory is used to store necessary program instructions and data of the network device.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • FIG. 1 is a schematic diagram of a communication system related to an embodiment of the present application
  • 2a-2b are schematic diagrams of the correlation peak simulation of a synchronization signal involved in an embodiment of the present application
  • 3a-3b are schematic diagrams of simulation of correlation peaks of a synchronization signal provided by an embodiment of the present application.
  • FIG. 4 is an example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 5 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 6 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 7 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 8 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 9 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 10 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 11 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 12 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 13 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • FIG. 14 is an example diagram of multiple synchronization signals provided by an embodiment of the present application.
  • FIG. 15 is another example diagram of multiple synchronization signals provided by an embodiment of the present application.
  • 16 is a schematic flowchart of a synchronization signal transmission method provided by an embodiment of the present application.
  • FIG. 17 is a schematic diagram 1 of a partial processing flow of a synchronization signal provided by an embodiment of the present application.
  • FIG. 18 is a schematic diagram 2 of a partial processing flow of a synchronization signal provided by an embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of another communication device provided by an embodiment of the present application.
  • the technical solution of this application can be applied to various communication systems.
  • the technical solution of this application can be used in a 5G system, also known as a new radio (NR) system; or can also be used in a device to device (D2D) system, Machine to machine (M2M) system, future communication system, etc.
  • NR new radio
  • D2D device to device
  • M2M Machine to machine
  • the network architecture and business scenarios described in the embodiments disclosed in this application are intended to more clearly illustrate the technical solutions of the embodiments disclosed in this application, and do not constitute a limitation on the technical solutions provided in the embodiments disclosed in this application. Ordinary technicians can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments disclosed in this application are equally applicable to similar technical problems.
  • the network device in this application may be a device with a wireless transceiver function or a chip that can be installed in the device.
  • the network device includes, but is not limited to: evolved node B (evolved node B, eNB), radio network controller (radio network controller) , RNC), Node B (NB), base station controller (BSC), base transceiver station (BTS), home base station (for example, home evolved Node B, or home Node B, HNB), baseband unit (BBU), access point (AP), wireless relay node, wireless backhaul node, transmission and reception in wireless fidelity (WIFI) system point, TRP or transmission point, TP), etc.
  • the gNB or transmission point may include a centralized unit (CU) and a DU.
  • the gNB may also include a radio unit (RU).
  • CU implements some functions of gNB or transmission point
  • DU implements some functions of gNB or transmission point, for example, CU implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer Function, DU realizes the functions of radio link control (radio link control, RLC), media access control (media access control, MAC), and physical (physical, PHY) layers.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • DU realizes the functions of radio link control (radio link control, RLC), media access control (media access control, MAC), and physical (physical, PHY) layers.
  • RRC radio resource control
  • PDCP packet data convergence protocol
  • DU realizes the functions of radio link control (radio link control, RLC), media access control (media access control, MAC),
  • the network device may be a CU node, or a DU node, or a device including a CU node and a DU node.
  • the CU can be divided into network equipment in the access network RAN, and the CU can also be divided into network equipment in the core network CN, which is not limited here.
  • terminal equipment may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless Communication equipment, user agent or user device can be applied to 5G, 6G and even 7G systems.
  • UE user equipment
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile equipment user terminal
  • terminal wireless Communication equipment
  • user agent or user device can be applied to 5G, 6G and even 7G systems.
  • the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in unmanned driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( The wireless terminal in transportation safety, the wireless terminal in the smart city, the wireless terminal in the smart home, the wireless terminal in the aforementioned V2X car networking, or the wireless terminal type RSU, etc.
  • At least one can also be described as one or more, and the multiple can be two, three, four or more, which is not limited in this application.
  • the embodiments disclosed in the present application for a technical feature, it is distinguished by "first”, “second”, “third”, “A”, “B”, “C”, and “D”.
  • the technical features in the technical features, the “first”, “second”, “third”, “A”, “B”, “C” and “D” describe the technical features in no order or size order.
  • the time unit may be one or more radio frames, one or more subframes, one or more time slots, one or more mini slots, one or more symbols, It may also be a time window formed by multiple frames or subframes, such as a system information (SI) window.
  • SI system information
  • the embodiment of the present application does not limit the time length of a symbol. For different subcarrier intervals, the length of a symbol can be different. Symbols can include uplink symbols and downlink symbols.
  • the uplink symbols can be referred to as single carrier frequency division multiple access (Single Carrier-Frequency Division Multiple Access, SC-FDMA) symbols or orthogonal frequency division multiple access (Orthogonal Frequency Division Multiplexing, OFDM) ) Symbol; downlink symbols can be called OFDM symbols.
  • SC-FDMA Single Carrier-Frequency Division Multiple Access
  • OFDM Orthogonal Frequency Division Multiplexing
  • the complex number sequence is a sequence containing M elements and at least one element is a complex number.
  • M is an integer greater than or equal to 2.
  • the local sequence is the basic sequence stored on the terminal device side.
  • the terminal device can use the local sequence to combine the signal received from the network device, and synchronize with the network device through arithmetic processing.
  • the terminal device can also obtain the identification information of the network device through the calculation processing.
  • the identification information of the network device may be a cell identity or a cell identification (cell identification, Cell ID).
  • the terminal device can use the local sequence to perform correlation operations with the processed synchronization signal sent by the network device to obtain the correlation peak value to achieve synchronization with the network device.
  • the first type of correlation operation is the sequence obtained after dot multiplication, dot division, conjugate dot multiplication, or conjugate dot division of corresponding elements between two sequences.
  • the correlation processing result before the first sequence and the second sequence in the synchronization signal is obtained based on the first correlation operation.
  • the second type of correlation operation is to multiply the corresponding elements between the two sequences, and then add the products separately to obtain a value.
  • the value can be a complex number or a real number.
  • the multiplication of the corresponding elements between the two sequences can be the direct multiplication of the corresponding elements of the two sequences, or the conjugate multiplication of the corresponding elements of the two sequences, or the multiplication of one sequence element and its corresponding sequence element Conjugate and multiply.
  • the result of the first correlation operation is a sequence; the result of the second correlation operation is a value.
  • the first sequence is ⁇ x 1 ,x 2 ,x 3 ,...,x m ⁇
  • the second sequence is ⁇ y 1 ,y 2 ,y 3 ,...,y m ⁇
  • m is each sequence
  • the number of elements in; at least one element in the first sequence is plural, and at least one element in the second sequence is also plural.
  • the correlation operation result between the first sequence and the second sequence is: ⁇ x 1 y 1 ,x 2 y 2 ,x 3 y 3 ,...,x m y m ⁇ , it can be seen that the result of the correlation operation is still a sequence of complex numbers.
  • the correlation operation result between the first sequence and the second sequence is: x 1 y 1 + x 2 y 2 + x 3 y 3 +...+x m y m , it can be seen that the correlation
  • the result of the operation is a numerical value.
  • FIG. 1 is a schematic diagram of a wireless communication system provided by an embodiment disclosed in the present application.
  • a wireless communication system may include: one or more network devices (for example, one or more base stations), and one or more terminal devices.
  • the network device can be used to communicate with the terminal through a wireless interface under the control of a network device controller (not shown).
  • the network device controller may be a part of the core network, or may be integrated into the network device.
  • the network device can be used to transmit control information or user data to the core network through a backhaul interface.
  • the device form shown in FIG. 1 is used as an example, that is, network devices are not limited to base stations, and terminal devices are not limited to mobile phones.
  • the network device communicates with the terminal device through a wireless interface or an air interface.
  • a terminal device communicates with a network device, it also needs to realize synchronization with the network device. Therefore, this application can design a synchronization signal.
  • the network device sends the synchronization signal to the terminal device.
  • the terminal device can synchronize with the network device according to the synchronization signal.
  • the synchronization signal includes a first sequence and a second sequence.
  • the first sequence is a first complex number sequence or a sequence obtained based on the first complex number sequence
  • the second sequence is a sequence obtained based on the first complex number sequence.
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the first complex number sequence is a Zadoff-Chu (ZC) sequence; or, the first complex number sequence is an inverse fast Fourier transformation of the ZC sequence, or m sequence, or Gold sequence ( Sequence obtained by inverse fast fourier transformation (IFFT) or fast Fourier transformation (fast fourier transformation, FFT).
  • ZC Zadoff-Chu
  • IFFT inverse fast fourier transformation
  • FFT fast Fourier transformation
  • the first complex number sequence may also be a sequence obtained by deforming the complex number sequence.
  • the complex number sequence may include a ZC sequence, a sequence obtained by performing IFFT or FFT on the ZC sequence, or m sequence, or Gold sequence.
  • the sequence formed after the above-mentioned complex number sequence is cyclically shifted and expanded is used as the first complex number sequence.
  • the sequence obtained by truncating a part of the elements of the complex number sequence is used as the first complex number sequence.
  • the conjugate sequence of the complex number sequence is taken as the first complex number sequence.
  • the sequence obtained after phase rotation of the complex sequence that is, each element of the above sequence is rotated by a given phase
  • a sequence obtained by multiplying multiple complex number sequences, a sequence obtained after conjugate multiplication, a sequence obtained after addition, a sequence obtained after modulo-2 addition, etc. can all be used as the first complex number sequence.
  • the first complex number sequence is a sequence whose sequence length is greater than 1 and at least one element is a complex number. Where the sequence length is greater than 1, it can be understood that the number of elements included in the sequence is greater than one.
  • the correlation processing of the first sequence and the second sequence can offset the initial sequence caused by the difference in crystal stability. The effect of large frequency deviation on synchronization estimation performance.
  • the above-mentioned local sequence may be a first complex sequence.
  • the correlation processing result between the first sequence and the second sequence and the local sequence are all complex sequences. Since the complex sequence has good autocorrelation characteristics, when correlating the correlation processing result with the local sequence, a sharp correlation peak can be obtained, which is beneficial to shorten the synchronization time, that is, shorten the cost of synchronization between the terminal and the network device. time.
  • the correlation processing result of the two sequences included in the synchronization signal is a sequence composed of +1 and -1. Since the autocorrelation characteristic of the sequence composed of +1 and -1 is not good, the correlation peak is not steep enough when performing correlation calculation with the local sequence. Assuming that the initial frequency offset error is 20 parts per million (20 ppm), the center frequency of the system is 900 MHz.
  • the time-domain correlation characteristics of the synchronization signal in the additive white Gaussian noise channel are shown in Figure 2a. The horizontal axis is the timing offset, and the vertical axis is the normalized correlation value.
  • the correlation processing result of the two sequences in the synchronization signal involved in this application is a complex sequence, which has better autocorrelation characteristics than the sequence composed of +1 and -1 described above. Therefore, Fig. 3b has a sharper correlation peak under the same simulation conditions as Fig. 2b, which can reduce the time required for synchronization.
  • the normalized correlation value represented by the vertical axis can be calculated using the following steps.
  • X sequence and Y sequence Perform a correlation operation on the X sequence and the Y sequence according to the second correlation operation described above to obtain a value.
  • the result of the second correlation operation will also be different.
  • all possible correlation operation results between the X sequence and the Y sequence are obtained. From all possible correlation calculation results, select the correlation calculation result with the largest modulus value, divide the modulus value of all possible correlation calculation results by the largest modulus value, and the result obtained is the normalized correlation value.
  • All possible correlation operation results between the X sequence and the Y sequence can be the second correlation operation between at least one element in the X sequence and the Y sequence, and the results of each correlation operation are obtained; or the X sequence and the Y sequence Perform the second correlation operation on at least one sequence element of to obtain the results of each correlation operation.
  • the modulus of the complex number is the sum of the square of the real part and the square of the imaginary part of the complex number and then the square root is taken.
  • the modulus of a real number is the real number itself or the absolute value of the real number.
  • the first sequence is a sequence transmitted on the first time unit; the second sequence is a sequence transmitted on the second time unit.
  • the resources occupied by the synchronization signal in the time domain include N time units, and the N time units include a first time unit and a second time unit. N is an integer greater than or equal to 2.
  • the first sequence is directly the first plural sequence, for example, various plural sequences described in the term section.
  • the first sequence is a sequence obtained based on the first complex number sequence and the first calculation rule.
  • the second sequence is a sequence obtained based on the first complex number sequence and the first calculation rule.
  • the first calculation rule includes any one of a point product rule, a conjugate point product rule, and a conjugate point division rule.
  • the first calculation rule is a calculation rule between corresponding elements of the sequence.
  • a* represents the conjugate of a or the conjugate of a.
  • A.*B ⁇ x 1 y 1 ,x 2 y 2 ,x 3 y 3 ,...,x m y m ⁇ ;
  • the first calculation rule and the first correlation operation described above can make the correlation operation result of the first sequence and the second sequence a complex sequence.
  • the first complex number sequence is denoted as the Z sequence below.
  • the first calculation rule is the dot product rule.
  • the first sequence may be Z.*Z, where Z represents the above-mentioned Z sequence; the second sequence may be Z.*Z.*Z.
  • c is a constant, where Z * represents the conjugate of each sequence element included in Z or the conjugate of Z.
  • the first calculation rule is the conjugate dot product rule.
  • the first sequence can be Z.*Z * ;
  • the second sequence can be Z.*Z * .*Z * .
  • c is a constant.
  • Z * means taking the conjugate of each element in the Z sequence.
  • the first calculation rule is the conjugate point division rule.
  • the first sequence is a sequence obtained based on the first complex number sequence and the first calculation rule
  • this embodiment of the application does not limit the number of times the first calculation rule is used in the process of generating the first sequence. It can be understood that as long as the first complex number sequence is used and the first calculation rule is used at least once during the generation of the first sequence, the first sequence can be considered to be based on the first complex number sequence and the first calculation rule. the sequence of.
  • the second sequence has the same description, which will not be repeated here.
  • the N time units may be continuous or discontinuous in the time domain.
  • the following embodiments are described by taking continuous time units as an example.
  • the sequence carried on each time unit may also adopt the following implementation manners shown in FIG. 4 to FIG. 13.
  • the N time units are divided into at least two time unit groups.
  • the division manner of the at least two time unit groups may be pre-defined by the protocol or configured by RRC.
  • the at least two time unit groups include a first time unit group and a second time unit group.
  • the first time unit is any time unit in the first time unit group; the second time unit is any time unit in the second time unit group.
  • the first time unit group is composed of time units numbered odd in N time units.
  • the second time unit group is composed of time units numbered as even numbers among N time units.
  • the number refers to the sequence of the time unit in the N time units.
  • the number of a time unit refers to the sequence of the time unit among the N time units arranged based on the sequence in the time domain.
  • the number of the time unit can be represented by the relative number of the time unit in the time unit included in the synchronization signal.
  • Fig. 4 is an example diagram of a synchronization signal provided by an embodiment of the present application.
  • N time units are taken as symbols 2 to 6 as an example.
  • the first sequence is the first complex number sequence, denoted as the Z sequence as an example.
  • m in the symbol m (in this example, m is an integer greater than or equal to 2 and less than or equal to 6), m can represent the index number of the symbol in 1 slot.
  • the number is the sequence of the time unit in the N time units
  • the number of the symbol 2 is 1; the number of the symbol 3 is 2; the number of the symbol 4 is 3; the number of the symbol 5 is 4; the number of the symbol 6 is 5.
  • the first time unit group formed by time units with odd numbers includes: symbol 2, symbol 4, and symbol 6.
  • the second time unit group formed by the even numbered time units includes: symbol 3 and symbol 5.
  • the symbols 2, 4, and 6 in the first time unit group are all the first sequence, that is, the Z sequence.
  • the symbols 3 and 5 in the second time unit group are both the second sequence, that is, the Z.*Z sequence.
  • the pattern sequence of the synchronization signal shown in FIG. 4 may also be referred to as a comb-like sequence.
  • the serial number of the time unit may also be represented by the absolute serial number of the time unit on the radio resource.
  • the time unit is one OFDM symbol
  • the number of the time unit may be represented by the absolute number of the time unit in one time slot, one subframe, or one radio frame.
  • Fig. 5 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • the first time unit group is: symbol 3 and symbol 5.
  • the second time unit group is: symbol 2, symbol 4, and symbol 6.
  • the symbols 3 and 5 in the first time unit group are both the first sequence, that is, the Z sequence.
  • Symbol 2, symbol 4, and symbol 6 in the second time unit group are all the second sequence, that is, Z.*Z.
  • the first time unit group is composed of N time units, and the time domain is first L time units; the second time unit group is composed of N time units, and the time domain is last. Is composed of NL time units; the L is or
  • Fig. 6 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • N is equal to 5
  • L That is, L is equal to 3.
  • the first time unit group is respectively: symbols 2, 3, and 4; the second time unit group is respectively: symbols 5 and 6.
  • the symbols 2, 3, and 4 in the first time unit group all carry the first sequence, that is, the Z sequence.
  • the symbols 5 and 6 in the second time unit group are all the second sequence, namely Z.*Z.
  • the first sequence when the number M1 of the first time unit in the N time units is equal to 1, the first sequence is a first complex number sequence. Or, when the number M1 of the first time unit in the N time units is greater than 1, the first sequence is a sequence obtained based on the first calculation rule and the M1 first complex number sequences. Or, when the number M1 of the first time unit in the N time units is equal to 1, the first sequence is a first complex number sequence; and the number M2 of the first time unit in the N time units is greater than 1. , The first sequence is a first complex number sequence.
  • the second sequence is a sequence obtained based on the first calculation rule and M2 of the first complex number sequences, the M2 is the number of the second time unit in the N time units, and the M2 Is an integer greater than 1.
  • the first time unit is located before the second time unit in the time domain. In this embodiment, the number of the time unit can also have the above two interpretations, which will not be detailed here.
  • FIG. 7 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • the first calculation rule is the dot product rule.
  • the first complex number sequence is denoted as the Z sequence.
  • the N time units are symbols 2 to 6 in FIG. 7.
  • the number of the symbol is the order of the symbol among the 5 symbols arranged first in the time domain.
  • the number of symbol 2 is 1; the number of symbol 3 is 2; the number of symbol 4 is 3; the number of symbol 5 is 4; and the number of symbol 6 is 5.
  • the sequence carried on symbol 2 is the first complex sequence, that is, the Z sequence.
  • the sequence carried on the symbols 3 to 6 can be determined according to the number of the symbols and the first calculation rule. As shown in Fig. 7, the number of symbol 3 is 2, therefore, the sequence carried on symbol 3 is the dot product of two Z sequences, that is, Z.*Z sequence.
  • the number of symbol 4 is 3. Therefore, the sequence carried on symbol 4 is the dot product of three Z sequences, that is, the Z.*Z.*Z sequence.
  • the number of the symbol 5 is 4, therefore, the sequence carried on the symbol 5 is the dot product of four Z sequences, that is, the Z.*Z.*Z.*Z sequence.
  • the number of the symbol 6 is 5, therefore, the sequence carried on the symbol 6 is a dot product of five Z sequences, that is, the Z.*Z.*Z.*Z sequence.
  • FIG. 8 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • the number of the symbol is the index number of the symbol in the wireless resource. Therefore, the number of symbol 2 is 2; the number of symbol 3 is 3; the number of symbol 4 is 4; the number of symbol 5 is 5; and the number of symbol 6 is 6.
  • the sequence carried on the symbol 2 is also obtained based on the first calculation rule and the two first complex sequences, that is, the Z.*Z sequence.
  • the sequence carried on the symbols 3 to 6 can also be determined according to the number of the symbols and the first calculation rule. As shown in Figure 8, the number of the symbol 3 is 3, and the sequence carried on the symbol 3 is the dot product of three Z sequences, that is, the Z.*Z.*Z sequence. Symbol 4 is numbered 4, and the sequence carried on symbol 4 is the dot product of four Z sequences, that is, Z.*Z.*Z.*Z sequence.
  • the number of the symbol 5 is 5, and the sequence carried on the symbol 5 is the dot product of five Z sequences, that is, the Z.*Z.*Z.*Z.*Z sequence.
  • Symbol 6 is numbered 6, and the sequence carried on symbol 6 is the dot product of six Z sequences, that is, Z.*Z.*Z.*Z.*Z.*Z sequence.
  • the first sequence is a first complex number sequence
  • the first sequence is a sequence obtained based on the first complex number sequence and the first calculation rule.
  • the second sequence is obtained by performing the first calculation rule on the first sequence and the first complex number sequence.
  • the second time unit is an adjacent time unit after the first time unit. That is, among the N time units, the sequence carried on each time unit is obtained by performing the first calculation rule on the sequence carried on the adjacent time unit of the time unit and the first complex sequence.
  • FIG. 9 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • the first calculation rule is the dot product rule.
  • the first complex number sequence is denoted as the Z sequence.
  • the first sequence is the Z.*Z.*Z sequence.
  • the N time units are symbols 2 to 6 in FIG. 9.
  • the first sequence carried on the symbol 2 is the Z.*Z.*Z sequence.
  • the sequence carried on the symbol 3 is: the dot product between Z.*Z.*Z and Z carried on the symbol 2, that is, the (Z.*Z.*Z).*Z sequence.
  • the sequence carried on symbol 4 is: the dot product between Z.*Z.*Z.*Z and Z carried on symbol 3, that is, the (Z.*Z.*Z).*Z sequence.
  • the sequence carried on symbol 5 is: the dot product between Z.*Z.*Z.*Z and Z carried on symbol 4, namely (Z.*Z.*Z.*Z) .*Z sequence.
  • the sequence carried on symbol 6 is: the dot product between Z.*Z.*Z.*Z.*Z and Z carried on symbol 5, namely (Z.*Z.*Z.*Z. *Z.*Z).*Z sequence.
  • FIGS. 4 to 9 are all described by taking the first calculation rule as the dot product rule as an example.
  • the dot product rule in FIGS. 4 to 9 can also be replaced with any one of the conjugate point product rule and the conjugate point division rule described above.
  • the resources occupied by the synchronization signal in the time domain are N+K time units.
  • the N time units can adopt any one of the implementation manners described in FIGS. 4 to 9 above. That is to say, in the embodiment disclosed in this application, among the resources occupied by the synchronization signal in the time domain, when the sequence carried on part of the time unit is the pattern sequence shown in Figures 4 to 9 above, the terminal can still be enabled according to For the sequence carried on this part of the time unit, the obtained correlation processing result is a complex sequence. Furthermore, a sharp correlation peak can be obtained. Among them, the embodiment of the present application does not limit the sequence carried on the other K time units.
  • FIG. 10 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • the first calculation rule is the dot product rule.
  • the first complex number sequence is denoted as the Z sequence.
  • the resources occupied by the synchronization signal in the time domain are symbols 2 to 6 shown in FIG. 10.
  • the sequence carried on the symbol 3 to the symbol 6 adopts the embodiment shown in FIG. 9. That is: the Z sequence carried on the symbol 3.
  • the sequence carried on symbol 4 is the dot product between the sequence carried on symbol 3 and the Z sequence, that is, the Z.*Z sequence.
  • the sequence carried on symbol 5 is the dot product between the sequence carried on symbol 4 and the Z sequence, that is, the Z.*Z.*Z sequence.
  • the sequence carried on the symbol 6 is the dot product between the sequence carried on the symbol 5 and the Z sequence, that is, the Z.*Z.*Z.*Z sequence.
  • the number of the time unit may still use the above-mentioned related definition of the number to determine the sequence carried on each time unit.
  • the serial number of each time unit in the N time units can be determined within the range of N+K time units.
  • the synchronization signal includes a first sequence and a second sequence, but the first sequence may be a constant sequence; the second sequence is a first complex sequence or a sequence obtained based on the first complex sequence.
  • the correlation processing result of the first sequence and the second sequence is still a complex sequence, so a sharp correlation peak can also be obtained.
  • FIG. 11 is a diagram of another example of a synchronization signal provided by an embodiment of the present application.
  • the first sequence is a sequence of all 1s
  • the second sequence is a first complex sequence, denoted as a Z sequence.
  • the resources occupied by the synchronization signal in the time domain are symbols 2 and 3.
  • Symbol 2 carries the first sequence, that is, the all 1 sequence.
  • Symbol 3 carries the second sequence, that is, the Z sequence.
  • the correlation processing result of the first sequence and the second sequence is the Z sequence (assuming that the first correlation operation used in the correlation processing result is the dot product rule).
  • the number of symbols occupied by the synchronization signal is small, which is suitable for scenarios with better channel conditions, and can quickly synchronize with the network device.
  • the N time units are divided into at least two time unit groups.
  • the division manner of the at least two time unit groups, as described above, may also be pre-defined by the protocol or configured by the RRC.
  • the at least two time unit groups include a first time unit group and a second time unit group.
  • the first time unit being any time unit in the first time unit group; and the second time unit being any time unit in the second time unit group in the foregoing embodiment: this implementation
  • the first time unit group can be divided into the third time unit group and the fourth time unit group by adopting the above-mentioned various embodiments; wherein, the first time unit is any time unit in the third time unit group; The second time unit is any time unit in the fourth time unit group; therefore, the sequence carried on each time unit in the first time unit group may have the sequence pattern described in any one of FIGS. 4 to 13.
  • the second time unit group can also be divided into the fifth time unit group and the sixth time unit group by adopting the foregoing various implementation manners; wherein, the first time unit is any time unit in the fifth time unit group; the second time unit The unit is any time unit in the sixth time unit group. Therefore, the sequence carried on each time unit in the second time unit group may also have the sequence pattern described in any one of FIGS. 4 to 13.
  • the N time units can be divided into at least two time unit groups, and each time unit group can independently use any one of the above-mentioned embodiments to determine the sequence carried on each time unit in the time unit group.
  • the implementation manners adopted between the time unit groups may be the same or different.
  • Fig. 12 takes the same implementation manner among the time unit groups as an example, and each time unit group adopts the implementation manner shown in Fig. 4 as an example.
  • FIG. 13 takes as an example the different implementation manners adopted between the time unit groups, and the first time unit group adopts the embodiment shown in FIG. 4 as an example, and the second time unit group adopts the embodiment shown in FIG. 9 as an example. example.
  • FIG. 12 is another example diagram of a synchronization signal provided by an embodiment of the present application. Assume that the N time units are symbol 2 to symbol 9 in FIG. 13. The N time units are divided into two time unit groups, the first time unit group is symbol 2 to symbol 5; the second time unit group is symbol 6 to symbol 9.
  • the sequence carried on symbol 2 and symbol 4 is a Z sequence; the sequence carried on symbol 3 and symbol 5 is a Z.*Z sequence.
  • the sequence carried on the symbol 6 and the symbol 8 is the Z sequence; the sequence carried on the symbol 7 and Fig. 9 is the Z.*Z sequence.
  • FIG. 13 is another example diagram of a synchronization signal provided by an embodiment of the present application.
  • the N time units are symbol 2 to symbol 9 in FIG. 13.
  • the N time units are divided into two time unit groups, the first time unit group is symbol 2 to symbol 5; the second time unit group is symbol 6 to symbol 9.
  • the sequence carried on symbol 2 and symbol 4 is a Z sequence; the sequence carried on symbol 3 and symbol 5 is a Z.*Z sequence.
  • the symbol 6 is the start symbol of the group, which carries the Z.*Z.*Z sequence.
  • the sequence carried on adjacent symbols is determined sequentially.
  • the sequence carried on symbol 7 is: the dot product between Z.*Z.*Z and Z carried on symbol 6, that is, the (Z.*Z.*Z).*Z sequence.
  • the sequence carried on symbol 8 is: the dot product between Z.*Z.*Z.*Z and Z carried on symbol 7, that is, the (Z.*Z.*Z.*Z).*Z sequence.
  • the sequence carried on symbol 9 is: the dot product between Z.*Z.*Z.*Z and Z carried on symbol 8, namely (Z.*Z.*Z.*Z) .*Z sequence.
  • the N time units can be divided into multiple groups, such as P group, where P is an integer greater than 1.
  • groups 2 to P-1 include Time units, or include Time units.
  • Group 1 includes Time units or Time units.
  • the sequence carried on each time unit in each group can be in accordance with the implementation manner shown in any one of the foregoing FIGS. 4 to 13.
  • the above-mentioned related implementations in FIG. 12 and FIG. 13 are beneficial to multiplexing the synchronization signal structure of the new air interface system, and simplify the complexity of system design.
  • the synchronization signal of the new air interface system includes four sequences and occupies four symbols in the time domain.
  • the network device can use four symbols as a group to repeatedly transmit multiple groups, and each group uses The structure of the synchronization signal is the same, as shown in Figure 12. Or, the structure of the synchronization signal used in each group is different, as shown in FIG. 13.
  • the network device may use the same transmit beam or different transmit beams to send the synchronization signals of each group when transmitting.
  • the embodiments of this application are not limited.
  • a group of time units in FIG. 12 and FIG. 13 may correspond to a synchronization signal. That is, in Figure 12 and Figure 13, the network device can send two synchronization signals. The first synchronization signal occupies symbols 2 to 5 in the time domain; the second synchronization signal occupies symbols 6 to 9 in the time domain.
  • the resources respectively occupied by the two synchronization signals sent by the network device in the time domain may be continuous or discontinuous.
  • FIG. 14 is an example diagram of the synchronization signal disclosed in this application.
  • the resources occupied by the first synchronization signal in the time domain are symbol 3 to symbol 6.
  • symbols 3 to 6 adopt the embodiment shown in FIG. 7 to determine the sequence carried by each symbol.
  • the resources occupied by the second synchronization signal in the time domain are symbol 9 to symbol 12.
  • the symbols 9 to 12 may also adopt the embodiment shown in FIG. 7 to determine the sequence carried by each symbol.
  • FIG. 15 is an example diagram of the synchronization signal disclosed in this application.
  • the time domain resources used by the first synchronization signal and the second synchronization signal in FIG. 15 are the same as those in FIG. 14.
  • the sequence pattern between the first synchronization signal and the second synchronization signal is different. That is, the first synchronization signal uses the embodiment shown in FIG. 7 to determine the sequence carried by each symbol.
  • the second synchronization signal can use the implementation shown in FIG. 8 to determine the sequence carried by each symbol.
  • the network device may send multiple synchronization signals.
  • the time domain resources occupied by the multiple synchronization signals may be continuous or discontinuous.
  • the implementation described in any one of FIGS. 4 to 13 may be used to determine the sequence carried by each time unit.
  • the correlation processing result of the first sequence and the second sequence is a complex sequence.
  • the complex number sequence can express the index number and/or identity of the cell through the number of bits shifted from the local sequence, or through different correlation processing results with the local sequence.
  • the cell index number and/or identifier can be understood as the identity information of the cell, for example, expressed by Cell ID.
  • the terminal can use different local sequences to perform the above-mentioned second correlation operation with different correlation processing results to obtain respective maximum values corresponding to different correlation processing results.
  • the correlation processing result between the first sequence and the second sequence in the first synchronization signal is used as the first correlation processing result, and the terminal uses the local sequence 1 to perform the correlation processing result with the first correlation processing result.
  • the second kind of correlation processing can get a maximum value.
  • the correlation processing result between the first sequence and the second sequence in the second synchronization signal as the second correlation processing result, the terminal uses the local sequence 2 to perform the second correlation processing result with the second correlation processing result
  • Two kinds of correlation processing can get another maximum value.
  • the terminal can use which of the above two maximum values is the largest to determine whether the synchronization signal sent by the network device is based on the first sequence and the second sequence corresponding to the first correlation processing result, or the first sequence corresponding to the second correlation processing result. Sequence and second sequence. It can be seen that the various synchronization signal structures shown in FIG. 4 to FIG. 15 are equivalent to that the synchronization signal sent by the network device carries 1 bit of information.
  • the embodiments disclosed in this application can also carry more information through the sequence.
  • the new air interface system can support 1008 cell IDs.
  • the network device may carry part of the cell ID through the first sequence, or carry part of the information that determines the cell ID.
  • the primary synchronization signal adopts the synchronization signal structure disclosed in this application, as described above, can carry 1 bit of information, and the value of the bit information is 1 or 0; the design of the secondary synchronization signal multiplexes the narrowband secondary synchronization signal (Narrowband Secondary Synchronization Signal, NSSS) carries 504 cell IDs.
  • NSSS Narrowband Secondary Synchronization Signal
  • the secondary synchronization signal can carry the 1st to 504th cell ID; when the bit information is 1, it means that the secondary synchronization signal can carry the 505th to 1008th cell ID, or when the bit information is 0, It means that the secondary synchronization signal can carry the 505th to 1008th cell ID; when the bit information is 1, it means that the secondary synchronization signal can carry the 1st to 504th cell ID.
  • the primary synchronization signal and the secondary synchronization signal can jointly determine 1008 cell IDs (the range of the 1008 cell IDs may be 0-1007).
  • the above 1008 cell IDs may also be other information, such as necessary information for other access network devices, etc., which is not limited in the embodiment of the present application.
  • FIG. 16 is a schematic flowchart of a synchronization signal transmission method according to an embodiment of the present application.
  • the synchronization signal transmission method may include the following steps:
  • a network device generates a synchronization signal, where the synchronization signal includes a first sequence and a second sequence.
  • the network device sends a synchronization signal; the terminal receives the synchronization signal from the network device.
  • the network device sending a synchronization signal may include: the network device sends the first sequence on a first time unit, and sends the second sequence on a second time unit; and the terminal device receives the network device sent on the first time unit. The first sequence and the second sequence sent on the second time unit. If the resource occupied by the synchronization signal in the time domain includes multiple time units, the network device can send the sequence carried by the time unit separately on each time unit.
  • the terminal device synchronizes with the network device according to the synchronization signal.
  • the terminal device synchronizes with the network device according to the first sequence and the second sequence.
  • the first sequence is a first complex sequence, or a sequence obtained based on the first complex sequence
  • the second sequence is a sequence obtained based on the first complex sequence
  • the first sequence is different from The second sequence and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • generating a synchronization signal by a network device may include: the network device uses the implementation manner described in any one of FIG. 4 to FIG. 13 to determine the first sequence carried on the first time unit and the second time unit carried The second sequence.
  • the process of sending a synchronization signal by a network device is illustrated by taking a sequence sent on two time units as an example.
  • the network device sending a synchronization signal may include: as shown in FIG. 17, the network device maps each element in the first sequence to each subcarrier corresponding to the first time unit, and maps each element of the second sequence to the second time On each subcarrier corresponding to the unit; perform inverse fast Fourier transform IFFT on each subcarrier in each time unit after mapping, and insert a cyclic prefix (CP) to resist multipath channel interference, and then send separately Time domain signal on each time unit.
  • the number of elements in the first sequence and the number of subcarriers corresponding to the first time unit may be the same or different.
  • the number of elements in the second sequence and the number of subcarriers corresponding to the second time unit may also be the same or different.
  • the subcarrier corresponding to each time unit refers to the resource occupied by the synchronization signal in the frequency domain.
  • the process of sending a synchronization signal by a network device is illustrated by taking a sequence sent on two time units as an example.
  • the network device sending a synchronization signal may include: as shown in FIG. 18, the network device first performs a discrete Fourier transform DFT of L points on the first sequence, where L may be the subcarrier corresponding to the first time unit carrying the first sequence The number may be obtained based on the number of subcarriers corresponding to the first time unit.
  • L-point discrete Fourier transform DFT is also performed on the second sequence, where L is the number of subcarriers corresponding to the second time unit carrying the second sequence, or is based on the number of subcarriers corresponding to the second time unit Number obtained.
  • the network device maps the first sequence after DFT to each subcarrier corresponding to the first time unit, and the second sequence after DFT maps to each subcarrier corresponding to the second time unit.
  • the network equipment performs the inverse fast Fourier transform IFFT on the mapped time domain signals, and inserts the cyclic prefix CP to resist multipath channel interference, thereby respectively sending the time domain signals on each time unit.
  • the number of subcarriers corresponding to the first time unit refers to the number of subcarriers used by the first time unit to transmit the first sequence.
  • the number of subcarriers corresponding to the second time unit refers to the number of subcarriers used by the second time unit to transmit the second sequence.
  • the power of the elements on each subcarrier can also be adjusted to ensure the receiving performance of each time domain signal on the terminal device side.
  • Other processing may also be performed in the above-mentioned two implementations of FIG. 17 and FIG. 18, which are not limited in the embodiment of the present application.
  • FIG. 17 may be applicable to the first complex sequence being a sequence obtained by performing inverse fast Fourier transform IFFT or fast Fourier transform FFT on the ZC sequence, or m sequence, or Gold sequence.
  • Figure 18 is applicable to the first complex number sequence being the ZC sequence.
  • the inverse fast Fourier transform IFFT in the above FIGS. 17 and 18 can be replaced with an inverse discrete fourier transform (IDFT).
  • IDFT inverse discrete fourier transform
  • the fast Fourier transform in Fig. 18 can be replaced by discrete Fourier transform (DFT).
  • the terminal device synchronizing with the network device according to the first sequence and the second sequence includes: the terminal device performs a first correlation operation on the first sequence and the second sequence to obtain a related processing result; The terminal device performs the second correlation operation on the correlation processing result with this sequence to obtain the correlation peak; the terminal device synchronizes with the network device according to the time domain position of the correlation peak.
  • the correlation processing result of the first sequence and the second sequence is still a complex sequence, which has better autocorrelation characteristics than the sequence composed of the usual correlation processing result of +1 and -1. Therefore, When the terminal performs a correlation operation with the local sequence based on the correlation processing result, it can obtain a sharp correlation peak. As shown in Figure 2a, Figure 2b, Figure 3a and Figure 3b above.
  • the sharp correlation peak can not only reduce the time required for the terminal and the network device to achieve time-domain synchronization, but can also assist the frequency offset estimation to obtain a smaller frequency offset error. This is because if the terminal can receive the synchronization signal sent by the network device at a more precise time, the accumulated useful signal energy will be higher when the frequency offset is estimated, which will help reduce the frequency offset estimation. The error of small frequency offset estimation. Further, the terminal can obtain synchronization with the network device faster, which can also reduce the time required for the terminal to achieve synchronization, thereby reducing the power consumption of the terminal.
  • FIG. 16 uses two time units as an example to illustrate the synchronization signal transmission method.
  • the synchronization signal includes N time units as an example.
  • the synchronization signal includes N sequences.
  • the synchronization signal transmission method may include: a network device generates a synchronization signal, the synchronization signal includes N sequences; wherein the N sequences included in the synchronization signal may have the sequences described in any of the above-mentioned embodiments shown in FIGS. 4 to 13 pattern. No more details here.
  • the network device sends the synchronization signal; the terminal device receives the synchronization signal from the network device; where the network device sends the synchronization signal, and the synchronization signal can be sent by using the processing procedure shown in FIG. 17 or FIG. 18 for N time units. . No more details here.
  • the terminal device synchronizes with the network device according to the synchronization signal. Wherein, the terminal device synchronizes with the network device according to the synchronization signal, and can perform related processing according to the sequence pattern described in any of the embodiments shown in FIG. 4 to FIG. 13 to synchronize with the network device. See the related content shown in Figure 16 above.
  • N is an integer greater than or equal to 2.
  • the N sequences include the first sequence and the second sequence described in FIG. 16.
  • the N time units include the first time unit and the second time unit described in FIG. 16.
  • the terminal device can adaptively select the number of time units used for synchronization estimation according to the channel state with the network device. For example, if the channel condition between the terminal device and the network device is good, the terminal device can synchronize with the network device through the calculation of any 2 or 3 time units among the N time units. If the channel conditions are poor, the terminal device can synchronize with the network device through the calculation of N symbols. Therefore, the structure of the synchronization signal in the foregoing embodiment disclosed in the present application facilitates the terminal device to adaptively select the number of time units for synchronization, and further reduces the time required for synchronization when the channel conditions are good.
  • the embodiments disclosed in this application do not consider that the synchronization signal sent by the network device is affected by non-ideal factors such as channel, noise, and carrier frequency offset (frequency offset for short), it is understandable that even if the synchronization signal sent by the network device is considered Affected by non-ideal factors such as channel, noise, carrier frequency offset (frequency offset for short), etc., after the synchronization signal is correlated with the local sequence, it can still retain good autocorrelation characteristics, that is, an obvious correlation peak can appear to facilitate The terminal equipment accurately determines the timing location.
  • non-ideal factors such as channel, noise, and carrier frequency offset (frequency offset for short)
  • the methods provided in the embodiments of the present application are introduced from the perspective of network equipment, terminal, and interaction between the network equipment and the terminal.
  • the network device and the terminal may include hardware structures and/or software modules, and the above functions are implemented in the form of hardware structures, software modules, or hardware structures plus software modules. Whether one of the above-mentioned functions is executed in a hardware structure, a software module, or a hardware structure plus a software module depends on the specific application and design constraint conditions of the technical solution.
  • FIG. 19 is a schematic structural diagram of a communication device according to an embodiment of the application.
  • a network device or a chip, a chip system, or a processor that supports the network device to implement the above method may adopt the communication device structure shown in FIG. 19, but it is not limited to the communication device structure shown in FIG.
  • the communication device structure described in FIG. 19 can also be used for terminal devices or chips, chip systems, or processors that support terminal devices to implement the above methods, but the above terminal devices or chips that support terminal devices to implement the above methods
  • the chip system, or processor may not be limited to the structure of the communication device shown in FIG. 19.
  • the communication device on the terminal side and the communication device on the network equipment side can have the same or similar structural design, that is, both can be designed with reference to the structure described in FIG. 19, so the repeated display and Repeat.
  • the communication device implemented by applying the structure of FIG. 19 can realize the functions of the terminal device and the network device.
  • this structure is implemented on the terminal device side, it is used to implement the functions of the terminal device side.
  • this structure is implemented on the network device side, it is used to implement the functions of the network device side.
  • the communication device described in FIG. 19 can be used to implement the method described in the foregoing method embodiment, and reference may be made to the description in the foregoing method embodiment.
  • the communication device may include one or more processors 1901, and the processor 1901 may also be referred to as a processing unit, which may implement certain control functions.
  • the processor 1901 may be a general-purpose processor or a special-purpose processor.
  • the processor 1901 may be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to control communication devices (such as base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), execute software programs, and process Software program data.
  • the processor 1901 may also store instructions and/or data 1903, and the instructions and/or data 1903 may be executed by the processor, so that the communication device 1900 executes the foregoing method embodiments. Method described in.
  • the processor 1901 may include a communication unit for implementing receiving and sending functions.
  • the communication unit may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuits, interfaces, or interface circuits used to implement the receiving and sending functions can be separate or integrated.
  • the foregoing transceiver circuit, interface, or interface circuit can be used for code/data reading and writing, or the foregoing transceiver circuit, interface, or interface circuit can be used for signal transmission or transmission.
  • the communication device 1900 may include a circuit, and the circuit may implement the sending or receiving or communication function in the foregoing method embodiment.
  • the communication device 1900 may include one or more memories 1902, on which instructions 1904 may be stored.
  • the instructions may be executed on the processor, so that the communication device 1900 executes the methods described in the foregoing method embodiments.
  • data may also be stored in the memory.
  • instructions and/or data may also be stored in the processor.
  • the processor and memory can be provided separately or integrated together. For example, the local sequence described in the above method embodiment may be stored in a memory or in a processor.
  • the communication device 1900 may further include a transceiver 1905 and/or an antenna 1906.
  • the processor 1901 may be referred to as a processing unit, and controls the communication device 1900.
  • the transceiver 1905 may be referred to as a communication unit, a transceiver, a transceiver circuit, or a transceiver, etc., for implementing the transceiver function.
  • a communication device 1900 may include:
  • a processor configured to generate a synchronization signal, the synchronization signal including a first sequence and a second sequence
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence;
  • the first sequence is a first complex sequence or a sequence obtained based on the first complex sequence;
  • the second sequence is a sequence obtained based on the first complex number sequence;
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the correlation operation used to calculate the correlation processing result between the first sequence and the second sequence is an operation between corresponding elements between the two sequences.
  • the correlation processing result between the first sequence and the second sequence is: a sequence obtained after dot multiplication, dot division, conjugate dot multiplication, or conjugate dot division of corresponding elements between the first sequence and the second sequence.
  • the first sequence is a sequence obtained based on the first complex number sequence and a first calculation rule; the second sequence is obtained based on the first complex number sequence and the first calculation rule
  • the sequence of; the first calculation rule includes any one of the point product rule, the conjugate point product rule, and the conjugate point division rule.
  • the first calculation rule is also the operation between corresponding elements between the two sequences.
  • the first complex sequence is a ZC sequence; or, the first complex sequence is an inverse fast Fourier transform IFFT or fast Fourier transform of the ZC sequence, or m sequence, or Gold sequence.
  • the inner leaf changes the sequence obtained by FFT.
  • the synchronization signal sent by the communication device can make the correlation processing result obtained by the terminal device based on the synchronization signal as a complex sequence, and then when performing correlation operations with the local sequence, a sharp correlation peak can be obtained.
  • a communication device 1900 may include:
  • a processor for generating a synchronization signal may include a constant sequence and a first sequence
  • the transceiver is used to send synchronization signals; the first time unit carrying the first sequence is different from the second time unit carrying the constant sequence.
  • the first sequence may be a first complex number sequence or a sequence obtained based on the first complex number sequence.
  • the correlation processing result between the constant sequence and the first sequence is a complex sequence. Therefore, as shown in FIG. 11, the synchronization signal transmission method described in this aspect can also obtain a sharper correlation peak. This helps to save the time required for synchronization and achieve fast synchronization.
  • a communication device 1900 may include:
  • a transceiver for receiving a synchronization signal from a network device includes a first sequence and a second sequence;
  • a processor configured to synchronize with the network device according to the synchronization signal
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence
  • the first sequence is a first complex number sequence or a sequence obtained based on the first complex number sequence
  • the second sequence is a sequence obtained based on the first complex number sequence
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the correlation operation used to calculate the correlation processing result between the first sequence and the second sequence is an operation between corresponding elements between the two sequences.
  • the correlation processing result between the first sequence and the second sequence is: a sequence obtained after dot multiplication, dot division, conjugate dot multiplication, or conjugate dot division of corresponding elements between the first sequence and the second sequence.
  • the first sequence is a sequence obtained based on the first complex number sequence and a first calculation rule; the second sequence is obtained based on the first complex number sequence and the first calculation rule
  • the sequence of; the first calculation rule includes any one of the point product rule, the conjugate point product rule, and the conjugate point division rule.
  • the first calculation rule is also the operation between corresponding elements between the two sequences.
  • the first complex sequence is a ZC sequence; or, the first complex sequence is an inverse fast Fourier transform IFFT or fast Fourier transform of the ZC sequence, or m sequence, or Gold sequence.
  • the inner leaf changes the sequence obtained by FFT.
  • the related content of the first sequence and the second sequence please refer to the related content of the foregoing method embodiment, which will not be detailed here.
  • the synchronization signal refers to the related content described in FIG. 4 to FIG. 13 in the foregoing method embodiment.
  • the processing process of the processor to generate the synchronization signal and send the synchronization signal refer to the related content described in the foregoing FIG. 16, FIG. 17, and FIG. 18. No more details here.
  • the terminal device can obtain a sharper correlation peak when it synchronizes with the network device according to the synchronization signal. Therefore, it is beneficial to save the time required for synchronization and realize fast synchronization.
  • a communication device 1900 may include:
  • a transceiver for receiving a synchronization signal from a network device may include a constant sequence and a first sequence
  • the processor is configured to perform synchronization with the network device according to the synchronization signal; the first time unit carrying the first sequence is different from the second time unit carrying the constant sequence.
  • the first sequence may be a first complex number sequence or a sequence obtained based on the first complex number sequence.
  • the correlation processing result between the constant sequence and the first sequence is a complex sequence. Therefore, as shown in FIG. 11, the synchronization signal transmission method described in this aspect can also obtain a sharper correlation peak. This helps to save the time required for synchronization and achieve fast synchronization.
  • the processor and transceiver described in this application can be implemented in integrated circuit (IC), analog IC, radio frequency integrated circuit RFIC, mixed signal IC, application specific integrated circuit (ASIC), printed circuit board ( printed circuit board, PCB), electronic equipment, etc.
  • IC integrated circuit
  • analog IC analog IC
  • radio frequency integrated circuit RFIC radio frequency integrated circuit
  • mixed signal IC mixed signal IC
  • ASIC application specific integrated circuit
  • PCB printed circuit board
  • electronic equipment etc.
  • Figure 20 provides a schematic structural diagram of a terminal device.
  • the terminal device can be applied to the scenario shown in FIG. 1.
  • FIG. 20 only shows the main components of the terminal device.
  • the terminal equipment includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, parse and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit processes the baseband signal to obtain a radio frequency signal and sends the radio frequency signal out in the form of electromagnetic waves through the antenna. .
  • the radio frequency circuit receives the radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and performs processing on the data. deal with.
  • FIG. 20 only shows a memory and a processor. In actual terminal devices, there may be multiple processors and memories.
  • the memory may also be referred to as a readable storage medium or a storage device, etc., which is not limited in the embodiment of the present application.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal device and execute Software program, processing the data of the software program.
  • the antenna and control circuit with the transceiver function can be regarded as the communication unit 2011 of the terminal device, and the processor with the processing function can be regarded as the processing unit 2012 of the terminal device.
  • the terminal device includes a communication unit 2011 and a processing unit 2012.
  • the communication unit may also be referred to as a transceiver, transceiver, transceiving device, and so on.
  • the device for implementing the receiving function in the communication unit 2011 can be regarded as the receiving unit
  • the device for implementing the sending function in the communication unit 2011 can be regarded as the sending unit, that is, the communication unit 2011 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the foregoing receiving unit and sending unit may be an integrated unit or multiple independent units.
  • the above-mentioned receiving unit and sending unit may be in one geographic location, or may be scattered in multiple geographic locations.
  • an embodiment of the present application provides another communication device 2100.
  • the communication device may be a terminal or a component of the terminal (for example, an integrated circuit, a chip, etc.).
  • the communication device may be a network device, or a component of a network device (for example, an integrated circuit, a chip, etc.).
  • the communication device may also be another communication unit for implementing the method in the method embodiment of the present application.
  • the communication device 2100 may include: a processing unit 2102.
  • a communication unit 2101 and a storage unit 2103 may also be included.
  • one or more units as shown in Figure 21 may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors It can be implemented with a transceiver; or implemented by one or more processors, memories, and transceivers, which is not limited in the embodiment of the present application.
  • the processor, memory, and transceiver can be set separately or integrated.
  • the communication device has the function of realizing the terminal equipment or network equipment described in the embodiments of the present application.
  • the communication device includes a module or unit or means corresponding to a terminal device that executes the steps involved in the terminal device described in the embodiment of the application, and the function or unit or means can be implemented by software or by hardware Realization can also be realized by hardware executing corresponding software, or a combination of software and hardware.
  • the communication device includes a module or unit or means corresponding to a terminal device that executes the steps involved in the terminal device described in the embodiment of the application, and the function or unit or means can be implemented by software or by hardware Realization can also be realized by hardware executing corresponding software, or a combination of software and hardware.
  • a communication device 2100 may include:
  • the communication unit 2101 is configured to receive synchronization signals from network devices
  • the processing unit 2102 is configured to synchronize with the network device according to the synchronization signal
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence
  • the first sequence is a first complex number sequence or a sequence obtained based on the first complex number sequence
  • the second sequence is a sequence obtained based on the first complex number sequence
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the related content of the first sequence and the second sequence please refer to the related content of the foregoing method embodiment, which will not be detailed here.
  • the synchronization signal refers to the related content described in FIG. 4 to FIG. 13 in the foregoing method embodiment.
  • the processing procedures of the processor to generate the synchronization signal and send the synchronization signal refer to the related content described in the foregoing FIG. 16, FIG. 17, and FIG. No more details here.
  • the synchronization signal is beneficial to obtain a sharper correlation peak when synchronizing with the network device. Therefore, it is beneficial to save the time required for synchronization and realize fast synchronization.
  • a communication device 2100 may include:
  • the processing unit 2102 is configured to generate a synchronization signal, where the synchronization signal includes a first sequence and a second sequence;
  • the communication unit 2101 is configured to send the synchronization signal
  • the first time unit carrying the first sequence is different from the second time unit carrying the second sequence
  • the first sequence is a first complex number sequence or a sequence obtained based on the first complex number sequence
  • the second sequence is a sequence obtained based on the first complex number sequence
  • the first sequence is different from the second sequence, and the correlation processing result between the first sequence and the second sequence is a complex sequence.
  • the terminal device synchronizes with the network device based on the synchronization signal, it obtains a sharper correlation peak. Therefore, it is beneficial to save the time required for synchronization and realize fast synchronization.
  • a communication device 2100 may include:
  • the processing unit 2102 is configured to generate a synchronization signal; the synchronization signal may include a constant sequence and a first sequence;
  • the communication unit 2101 is configured to send a synchronization signal; the first time unit carrying the first sequence is different from the second time unit carrying the constant sequence.
  • the first sequence may be a first complex number sequence or a sequence obtained based on the first complex number sequence.
  • the correlation processing result between the constant sequence and the first sequence is a complex sequence. Therefore, as shown in FIG. 11, the synchronization signal transmission method described in this aspect can also obtain a sharper correlation peak. This helps to save the time required for synchronization and achieve fast synchronization.
  • a communication device 2100 may include:
  • the communication unit 2101 is configured to receive a synchronization signal from a network device; the synchronization signal may include a constant sequence and a first sequence;
  • the processing unit 2102 is configured to synchronize with the network device according to the synchronization signal; the first time unit carrying the first sequence is different from the second time unit carrying the constant sequence.
  • the first sequence may be a first complex number sequence or a sequence obtained based on the first complex number sequence.
  • the correlation processing result between the constant sequence and the first sequence is a complex sequence. Therefore, as shown in FIG. 11, the synchronization signal transmission method described in this aspect can also obtain a sharper correlation peak. This helps to save the time required for synchronization and achieve fast synchronization.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the aforementioned processor may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the memory in the embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • serial link DRAM SLDRAM
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the function of any of the foregoing method embodiments is realized.
  • This application also provides a computer program product, which, when executed by a computer, realizes the functions of any of the foregoing method embodiments.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.

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Abstract

本申请提供一种同步信号传输方法及通信装置，应用于通信领域。该同步信号传输方法中，网络设备生成并发送的同步信号可以包含第一序列和第二序列。第一序列为第一复数序列或基于第一复数序列得到的序列；第二序列为基于第一复数序列得到的序列，且第二序列不同于第一序列。由于第一序列和第二序列之间的相关处理结果依旧为复数序列，具有良好的相关特性，从而，使得终端设备根据该同步信号，与网络设备进行同步时，能够获得较为尖锐的相关峰值，有效减少了同步所需的时长。

Description

同步信号传输方法及通信装置
本申请要求于2019年8月21日提交中国专利局、申请号为201910774515.X、申请名称为“同步信号传输方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种同步信号传输方法及通信装置。
背景技术
通信系统中，终端设备在与网络设备建立数据传输通道之前，需要实现同步。即终端设备需要基于网络设备发送的同步信号，实现与网络设备的同步。在同步过程中，需要尽可能的降低终端设备与网络设备之间的同步时间，以避免终端设备需要不停的接收网络设备发送的同步信号，从而增加终端设备的功耗。
然而，目前通信系统所采用的同步信号在实现与网络设备的同步处理过程中，同步信号中序列的相关处理结果为+1、-1构成的序列。由于+1、-1构成的序列的自相关特性不好，因此，该相关处理结果与本地序列进行相关运算时，相关峰值不够陡峭。即终端设备获得的相关峰值具有毛刺现象，导致终端设备与网络设备进行同步时所需的时长较长。
发明内容
本申请提供一种同步信号传输方法及通信装置，有利于实现快速同步。
第一方面，本申请提供一种同步信号传输方法。该同步信号传输方法中，同步信号包括第一序列和第二序列。其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；并且，第一序列为第一复数序列或基于第一复数序列得到的序列；第二序列是基于第二复数序列得到的序列，不同于第一序列。该同步信号中，第一序列和第二序列之间的相关处理结果为复数序列，因此，网络设备向终端设备发送该同步信号，能够使得终端设备能够根据该同步信号实现与网络设备同步时，获得更加尖锐的相关峰值。从而，有利于节省同步所需的时长，实现快速同步。
其中，承载所述第一序列的第一时间单元，可以理解为网络设备发送所述第一序列所对应的时间单元，即网络设备在第一时间单元上发送所述第一序列。相应的，承载第二序列的第二时间单元，也可理解为网络设备在第二时间单元上发送第二序列。
在一种实施方式中，计算第一序列和第二序列之间的相关处理结果所采用的相关运算，是两个序列之间对应元素之间的运算。第一序列和第二序列之间的相关处理结果为：第一序列和第二序列之间对应元素的点乘、点除、共轭点乘或者共轭点除后，获得的序列。
在一种实施方式中，所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。其中，第一计算规则也是两个序列之间对应元素之间的运算。
在一种实施方式中，所述第一复数序列为ZC序列；或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
在另一种实施方式中，所述第一序列是第一复数序列或是基于所述第一复数序列和第一计算规则得到的序列。所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的。可选的，第二时间单元为与所述第一时间单元相邻的时间单元。这样，该实施方式可以以第一时间单元为起始，依次确定出各相邻的时间单元上承载的序列。比如，第一时间单元为同步信号在时域上所占资源中的第一个时间单元、最后一个时间单元或某一时间单元，这样，其他各时间单元上承载的序列可基于该实施方式以第一时间单元为起始，依次确定。可见，网络设备发送该实施方式所述的同步信号，使得终端设备可选择任意相邻的时间单元上承载的序列进行相关运算，获得的相关处理结果为复数序列。进而，终端基于该相关处理结果与本地序列进行相关运算，可获得一尖锐的相关峰值，从而有利于缩短同步所需的时长。
其中，相邻的时间单元可以理解为在时域上相邻的两个时间单元。两个相邻的时间单元在时域上可以是连续的，也可以是不连续的。
在一种实施方式中，该N个时间单元划分为至少两个时间单元组。该至少两个时间单元组的划分方式，可以为协议预定义或无线资源控制RRC配置的方式进行分组。至少两个时间单元组包括第一时间单元组和第二时间单元组。所述第一时间单元为所述第一时间单元组中的任一时间单元；所述第二时间单元为所述第二时间单元组中的任一时间单元。可见，网络设备发送该实施方式所述的同步信号，使得终端设备可分别从两个时间单元组中选择一个时间单元上承载的序列进行相关运算，获得的相关处理结果为复数序列。进而，终端基于该相关处理结果与本地序列进行相关运算，可获得一尖锐的相关峰值，从而有利于缩短同步所需的时长。
在一种实施方式中，第一时间单元组为N个时间单元中，编号为奇数的时间单元构成的。第二时间单元组为N个时间单元中，编号为偶数的时间单元构成的。
在一种实施方式中，编号是指时间单元在该N个时间单元中的顺序。比如，时间单元的编号是指在基于时域上的先后顺序进行排列的N个时间单元中，该时间单元的排列顺序。也就是说，时间单元的编号可以用该时间单元在同步信号所包括的时间单元中的相对编号来表示。在另一种实施方式中，时间单元的编号也可以用该时间单元在无线资源上的绝对编号来表示。例如，假设时间单元为1个符号时，该时间单元的编号可以用该时间单元在1个时隙或者1个子帧，或者1个无线帧内的绝对编号来表示。
在另一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元组是由所述N个时间单元中，时域在前的L个时间单元构成的；所述第二时间单元组是由所述N个时间单元中，时域在后的N-L个时间单元构成的；所述N为大于或等于2的整数；所述L为
Figure PCTCN2020110089-appb-000001
或
Figure PCTCN2020110089-appb-000002
在又一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元在时域上位于所述第二时间单元之前。
该实施方式中，第一时间单元上承载的第一序列具有如下三种情况。一种情况，所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列。另一种情况，所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列。又一种情况，所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列；以及所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列。
所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。该实施方式中，时间单元的编号也可以有上述两种解释，此处不再详述。可见，网络设备发送该实施方式所述的同步信号，也能够使得终端设备选择相邻的时间单元上承载的序列进行相关运算，获得的相关处理结果为复数序列。进而，终端基于该相关处理结果与本地序列进行相关运算，可获得一尖锐的相关峰值，从而有利于缩短同步所需的时长。
在又一种实施方式中，该N个时间单元划分为至少两个时间单元组。该至少两个时间单元组的划分方式，可以为协议预定义或信令配置的方式进行分组(例如通过高层信令和/或下行控制信息来指示分组信息)。例如，高层信令可以是无线资源控制(radio resource control，RRC)信令，介质访问控制(Media Access Control，MAC)信令。例如，下行控制信息可以为下行控制信道中所承载的信息。
至少两个时间单元组中，每个时间单元组的各时间单元上承载的序列可以具有上述任一实施方式所述同步信号的序列图样。也就是说，该N个时间单元可以划分为至少两个时间单元组，每个时间单元组都可单独采用上述实施方式中的任一种来确定该时间单元组中各时间单元上承载的序列。可选的，各时间单元组之间所采用的实施方式可以相同，也可以不同。
在一种实施方式中，终端设备在信道条件好时，可基于一个时间单元组中时间单元承载的序列与网络设备进行同步；若信道条件不好，可基于多个时间单元组进行多次的同步处理。可见，该实施方式能够改善同步信号传输的可靠性。
另外，该实施方式中，至少两个时间单元组中，不同时间单元组所占的时域资源也可以为连续的或不连续的。
在又一种实施方式中，网络设备可以发送多个同步信号，各同步信号之间所占的时域资源可为连续的，也可以不连续的。其中，每个同步信号所采用的实施方式可以为上述任一种。两个同步信号之间所采用的图样序列可以相同，也可以不同。
在又一种实施方式中，同步信号在时域上所占的资源为N+K个时间单元。其中，该N个时间单元中，各时间单元上承载的序列可采用上述所述的任一实施方式进行确定。另外K个时间单元上承载的序列，本申请实施例不做限定。
也就是说，本申请公开的实施例中，同步信号在时域上所占的资源中，即使部分时间单元上承载的序列采用上述任一实施方式确定，依旧能够使得终端根据该部分时间单元上承载的序列，获得的相关处理结果为复数序列。进而，能够获得尖锐的相关峰值。针对同步信号在时域上所占的资源中另外部分时间单元上承载的序列，本申请实施例不做限定。
第二方面，本申请还提供一种同步信号传输方法。该同步信号传输方法中，网络设备生成并发送同步信号。该同步信号可以包括常数序列和第一序列，承载第一序列的第一时间单元与承载常数序列的第二时间单元不同。其中，第一序列可为第一复数序列或基于第一复数序列得到的序列。其中，该常数序列和第一序列的相关处理结果为复数序列。因此，该方面所述的同步信号传输方法也能够获得更加尖锐的相关峰值。从而有利于节省同步所需的时长，实现快速同步。
可选的，该常数序列可以理解为序列元素均为实数的序列。可选的，该常数序列中包括的各个序列元素的绝对值都相等。
第三方面，本申请还提供一种同步信号传输方法。该同步信号传输方法是从终端设备的角度进行阐述的。终端设备可接收来自网络设备的同步信号。该同步信号包括第一序列和第二序列，承载第一序列的第一时间单元与承载所述第二序列的第二时间单元不同；所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。因此，终端设备在与网络设备进行同步时，能够基于该相关处理结果获得尖锐的相关峰值，从而有利于缩短同步所需的时长。
该方面中，第一序列、第二序列的相关内容，以及同步信号各种可选的实施方式可参见上述第一方面的相关内容，此处不再详述。
第四方面，本申请还提供一种同步信号传输方法。该同步信号传输方法中，终端设备接收来自网络设备的同步信号，并根据该同步信号与网络设备进行同步。该同步信号可以包括常数序列和第一序列。其中，承载第一序列的第一时间单元与承载常数序列的第二时间单元不同。其中，第一序列可为第一复数序列或基于第一复数序列得到的序列。其中，该常数序列和第一序列的相关处理结果为复数序列。因此，该方面所述的同步信号传输方法也能够获得更加尖锐的相关峰值。从而有利于节省同步所需的时长，实现快速同步。
该方面中，第一复数序列的相关内容可以参见上述第一方面的相关阐述，此处不再详述。
第五方面，本申请还提供一种通信装置。该通信装置具有实现上述第一方面至第二方面任一方面所述的网络设备的部分或全部功能。比如，装置的功能可具备本申请中网络设备的部分或全部实施例中的功能，也可以具备单独实施本申请中的任一个实施例的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该通信装置的结构中可包括处理单元和通信单元，所述处理单元被配置为支持通信装置执行上述方法中相应的功能。所述通信单元用于支持通信装置与其他设备之间的通信。所述通信装置还可以包括存储单元，所述存储单元用于与处理单元和通信单元耦合，其保存通信装置必要的程序指令和数据。
一种实施方式中，所述通信装置包括：
处理单元，用于生成同步信号，所述同步信号包含第一序列和第二序列；
通信单元，用于发送所述同步信号；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；所述第一 序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
一种实施方式中，所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。
一种实施方式中，所述同步信号在时域上占用的资源包括第一时间单元组和第二时间单元组；所述第一时间单元为所述第一时间单元组中的任一时间单元；所述第二时间单元为所述第二时间单元组中的任一时间单元。
一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述N为大于或等于2的整数；所述第一时间单元组是由所述N个时间单元中，编号为奇数的时间单元构成的；所述第二时间单元组是由所述N个时间单元中，编号为偶数的时间单元构成的。
另一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元组是由所述N个时间单元中，时域在前的L个时间单元构成的；所述第二时间单元组是由所述N个时间单元中，时域在后的N-L个时间单元构成的；所述N为大于或等于2的整数；所述L为
Figure PCTCN2020110089-appb-000003
或
Figure PCTCN2020110089-appb-000004
又一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元在时域上位于所述第二时间单元之前；所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列；或，所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列；所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。
又一种实施方式中，所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的；所述第二时间单元为与所述第一时间单元相邻的时间单元。
一种实施方式中，所述第一复数序列为ZC序列；或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
该方面中，第一序列、第二序列的其它相关内容，以及同步信号各种可选的实施方式可参见上述第一方面的相关内容，此处不再详述。
作为示例，通信单元可以为收发器或通信接口，存储单元可以为存储器，处理单元可以为处理器。
一种实施方式中，所述通信装置包括：
处理器，用于生成同步信号，所述同步信号包含第一序列和第二序列；
收发器，用于发送所述同步信号；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；所述第一 序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
该方面中，第一序列、第二序列的相关内容，以及同步信号各种可选的实施方式可参见上述第一方面的相关内容，此处不再详述。
在实现过程中，处理器可用于进行，例如但不限于，基带相关处理，收发器可用于进行，例如但不限于，射频收发。上述器件可以分别设置在彼此独立的芯片上，也可以至少部分的或者全部的设置在同一块芯片上。例如，处理器可以进一步划分为模拟基带处理器和数字基带处理器。其中，模拟基带处理器可以与收发器集成在同一块芯片上，数字基带处理器可以设置在独立的芯片上。随着集成电路技术的不断发展，可以在同一块芯片上集成的器件越来越多。例如，数字基带处理器可以与多种应用处理器(例如但不限于图形处理器，多媒体处理器等)集成在同一块芯片之上。这样的芯片可以称为系统芯片(System on Chip)。将各个器件独立设置在不同的芯片上，还是整合设置在一个或者多个芯片上，往往取决于产品设计的需要。本申请实施例对上述器件的实现形式不做限定。
第六方面，本申请还提供一种通信装置。该通信装置具有实现上述第三方面至第四方面任一方面所述的方法示例中终端的部分或全部功能。比如，通信装置的功能可具备本申请中的部分或全部实施例中的功能，也可以具备单独实施本申请中的任一个实施例的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该通信装置的结构中可包括处理单元和通信单元，所述处理单元被配置为支持通信装置执行上述方法中相应的功能。所述通信单元用于支持通信装置与其他设备之间的通信。所述通信装置还可以包括存储单元，所述存储单元用于与处理单元和发送单元耦合，其保存通信装置必要的程序指令和数据。
一种实施方式中，所述通信装置包括：
通信单元，用于接收来自网络设备的同步信号；
处理单元，用于根据所述同步信号，与所述网络设备进行同步；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；
所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
一种实施方式中，第一序列是基于第一复数序列和第一计算规则得到的序列；第二序列是基于第一复数序列和第一计算规则得到的序列；第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。
一种实施方式中，所述同步信号在时域上占用的资源包括第一时间单元组和第二时间单元组；所述第一时间单元为所述第一时间单元组中的任一时间单元；所述第二时间单元为所述第二时间单元组中的任一时间单元。
一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述N为大于或等于2的整数；所述第一时间单元组是由所述N个时间单元中，编号为奇数的时间单元构成的；所述第二时间单元组是由所述N个时间单元中，编号为偶数的时间单元构成的。
另一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元组是由所述N个时间单元中，时域在前的L个时间单元构成的；所述第二时间单元组是由所述N个时间单元中，时域在后的N-L个时间单元构成的；所述N为大于或等于2的整数；所述L为
Figure PCTCN2020110089-appb-000005
或
Figure PCTCN2020110089-appb-000006
又一种实施方式中，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元在时域上位于所述第二时间单元之前；所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列；或，所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列；所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。
又一种实施方式中，所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的；所述第二时间单元为与所述第一时间单元相邻的时间单元。
一种实施方式中，所述第一复数序列为ZC序列；或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
另外，该方面中，第一序列、第二序列的其它相关内容，以及同步信号各种可选的实施方式可参见上述第一方面的相关内容，此处不再详述。
作为示例，处理单元可以为处理器，通信单元可以为收发器或通信接口，存储单元可以为存储器。
一种实施方式中，所述通信装置包括：
收发器，用于接收来自网络设备的同步信号；
处理器，用于根据所述同步信号，与所述网络设备进行同步；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；
所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
该方面中，第一序列、第二序列的相关内容，以及同步信号各种可选的实施方式可参见上述第一方面的相关内容，此处不再详述。
第七方面，本申请还提供一种处理器，用于执行上述各种方法。在执行这些方法的过程中，上述方法中有关发送上述信息和接收上述信息的过程，可以理解为由处理器输出上述信息的过程，以及处理器接收输入的上述信息的过程。在输出上述信息时，处理器将该上述信息输出给收发器，以便由收发器进行发射。该上述信息在由处理器输出之后，还可 能需要进行其他的处理，然后才到达收发器。类似的，处理器接收输入的上述信息时，收发器接收该上述信息，并将其输入处理器。更进一步的，在收发器收到该上述信息之后，该上述信息可能需要进行其他的处理，然后才输入处理器。
基于上述原理，举例来说，前述方法中提及的发送同步信号可以理解为处理器输出同步信号。又例如，接收同步信号可以理解为处理器接收输入的同步信号。
对于处理器所涉及的发射、发送和接收等操作，如果没有特殊说明，或者，如果未与其在相关描述中的实际作用或者内在逻辑相抵触，则均可以更加一般性的理解为处理器输出和接收、输入等操作，而不是直接由射频电路和天线所进行的发射、发送和接收操作。
在实现过程中，上述处理器可以是专门用于执行这些方法的处理器，也可以是执行存储器中的计算机指令来执行这些方法的处理器，例如通用处理器。上述存储器可以为非瞬时性(non-transitory)存储器，例如只读存储器(Read Only Memory，ROM)，其可以与处理器集成在同一块芯片上，也可以分别设置在不同的芯片上，本申请实施例对存储器的类型以及存储器与处理器的设置方式不做限定。
第八方面，本申请还提供了一种通信系统，该系统包括上述方面的至少一个终端设备、至少一个网络设备。在另一种可能的设计中，该系统还可以包括本申请提供的方案中与终端或网络设备进行交互的其他设备。
第九方面，本申请提供了一种计算机可读存储介质，用于储存计算机软件指令，当所述指令被通信装置执行时，实现上述第三方面至第四方面任一方面所述的方法。
第十方面，本申请提供了一种计算机可读存储介质，用于储存计算机软件指令，当所述指令被通信装置执行时，使得通信装置实现上述第一方面或第二方面所述的方法。
第十一方面，本申请还提供了一种包括指令的计算机程序产品，当其在通信装置上运行时，使得通信装置执行上述第一方面或第二方面所述的方法。
第十二方面，本申请还提供了一种包括指令的计算机程序产品，当其在通信装置上运行时，使得通信装置执行上述第三方面或第四方面所述的方法。
第十三方面，本申请提供了一种芯片系统，该芯片系统包括处理器和接口，所述接口用于获取程序或指令，所述处理器用于调用所述程序或指令以实现或者支持网络设备实现第一方面至第二方面任一方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存网络设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十四方面，本申请提供了一种芯片系统，该芯片系统包括处理器和接口，所述接口用于获取程序或指令，所述处理器用于调用所述程序或指令以实现或者支持终端设备实现第三方面至第四方面所涉及的功能，例如，确定或处理上述方法中所涉及的数据和信息中的至少一种。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存网络设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
附图说明
图1是本申请实施例涉及的一种通信系统的示意图；
图2a-图2b是本申请实施例涉及的一同步信号的相关峰值仿真示意图；
图3a-图3b是本申请实施例提供的一同步信号的相关峰值的仿真示意图；
图4是本申请实施例提供的同步信号的一种示例图；
图5是本申请实施例提供的同步信号的另一种示例图；
图6是本申请实施例提供的同步信号的又一种示例图；
图7是本申请实施例提供的同步信号的又一种示例图；
图8是本申请实施例提供的同步信号的又一种示例图；
图9是本申请实施例提供的同步信号的又一种示例图；
图10是本申请实施例提供的同步信号的又一种示例图；
图11是本申请实施例提供的同步信号的又一种示例图；
图12是本申请实施例提供的同步信号的又一种示例图；
图13是本申请实施例提供的同步信号的又一种示例图；
图14是本申请实施例提供的多个同步信号的一种示例图；
图15是本申请实施例提供的多个同步信号的另一种示例图；
图16是本申请实施例提供的一种同步信号传输方法的流程示意图；
图17是本申请实施例提供的一种同步信号的部分处理流程示意图一；
图18是本申请实施例提供的一种同步信号的部分处理流程示意图二；
图19是本申请实施例提供的一种通信装置的结构示意图；
图20是本申请实施例提供的一种终端设备的结构示意图；
图21是本申请实施例提供的另一种通信装置的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
本申请的技术方案可应用于各种通信系统中。例如，随着通信技术的不断发展，本申请的技术方案可用于5G系统，也可以称为新空口(new radio，NR)系统；或者还可用于设备到设备(device to device，D2D)系统，机器到机器(machine to machine，M2M)系统，以及未来通信系统等等。
其中，本申请公开的实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请公开的实施例的技术方案，并不构成对于本申请公开的实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请公开的实施例提供的技术方案对于类似的技术问题，同样适用。
本申请中网络设备可为具有无线收发功能的设备或可设置于该设备的芯片，该网络设备包括但不限于：演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved Node B，或home Node B，HNB)、基带单元(baseband unit，BBU)，无线保真(wireless fidelity，WIFI)系统中的接入点(access point，AP)、无线中继节点、无线回传节点、传输点(transmission and  reception point，TRP或者transmission point，TP)等，还可以为5G、6G甚至7G系统中使用的设备，如，NR系统中的gNB，或，传输点(TRP或TP)，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(BBU)，或，分布式单元(DU，distributed unit)，或微微基站(Picocell)，或毫微微基站(Femtocell)，或，车联网(vehicle to everything，V2X)或者智能驾驶场景中的路侧单元(road side unit，RSU)。
在一些部署中，gNB或传输点可以包括集中式单元(centralized unit，CU)和DU。gNB还可以包括射频单元(radio unit，RU)。CU实现gNB或传输点的部分功能，DU实现gNB或传输点的部分功能，比如，CU实现无线资源控制(radio resource control，RRC)，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能，DU实现无线链路控制(radio link control，RLC)、媒体接入控制(media access control，MAC)和物理(physical，PHY)层的功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令或PHCP层信令，也可以认为是由DU发送的，或者，由DU+RU发送的。可以理解的是，网络设备可以为CU节点、或DU节点、或包括CU节点和DU节点的设备。此外，CU可以划分为接入网RAN中的网络设备，也可以将CU划分为核心网CN中的网络设备，在此不做限制。
本申请中，终端设备也可以称为用户设备(user equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置，可以应用于5G、6G甚至7G系统。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、前述的V2X车联网中的无线终端或无线终端类型的RSU等等。
为了便于理解本申请公开的实施例，作出以下几点说明。
(1)本申请公开的实施例中部分场景以无线通信网络中NR网络的场景为例进行说明，应当指出的是，本申请公开的实施例中的方案还可以应用于其他无线通信网络中，相应的名称也可以用其他无线通信网络中的对应功能的名称进行替代。
(2)本申请公开的实施例将围绕包括多个设备、组件、模块等的系统来呈现本申请的各个方面、实施例或特征。应当理解和明白的是，各个系统可以包括另外的设备、组件、模块等，并且/或者可以并不包括结合附图讨论的所有设备、组件、模块等。此外，还可以使用这些方案的组合。
(3)在本申请公开的实施例中，“示例的”一词用于表示作例子、例证或说明。本申请中被描述为“示例”的任何实施例或设计方案不应被解释为比其它实施例或设计方案更优选或更具优势。确切而言，使用示例的一词旨在以具体方式呈现概念。
(4)本申请公开的实施例中，“的(of)”，“相应的(relevant)”和“对应的(corresponding)”有时可以混用，应当指出的是，在不强调其区别时，其所要表达的含义是一致的。
(5)本申请公开的实施例中，至少一个还可以描述为一个或多个，多个可以是两个、三个、四个或者更多个，本申请不做限制。在本申请公开的实施例中，对于一种技术特征，通过“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”等区分该种技术特征中的技术特征，该“第一”、“第二”、“第三”、“A”、“B”、“C”和“D”描述的技术特征间无先后顺序或者大小顺序。
为便于理解本申请公开的实施例，对涉及的几个术语进行简单阐述。
1、时间单元
本申请公开的实施例中，时间单元可以是一个或多个无线帧，一个或多个子帧，一个或多个时隙，一个或多个微时隙(mini slot)，一个或多个符号，也可以是多个帧或子帧构成的时间窗口，例如系统信息(system information，SI)窗口。本申请实施例对一个符号的时间长度不做限制。针对不同的子载波间隔，一个符号的长度可以有所不同。符号可以包括上行符号和下行符号，其中，上行符号可以称为单载波频分多址(Single Carrier-Frequency Division Multiple Access，SC-FDMA)符号或正交频分多址(Orthogonal Frequency Division Multiplexing，OFDM)符号；下行符号可以称为OFDM符号。
2、复数序列
复数序列为包含M个元素且至少一个元素为复数的序列。其中，M为大于或等于2的整数。
3、本地序列
本地序列是终端设备侧存储的基础序列。终端设备可利用该本地序列，联合从网络设备接收到的信号，通过运算处理可以与网络设备实现同步。可选地，终端设备通过该运算处理，还可以获得网络设备的标识信息。例如，网络设备的标识信息可以为小区身份或小区标识(cell identification，Cell ID)。终端设备可利用本地序列，与处理后的网络设备发送的同步信号进行相关运算，从而获得相关峰值，以与网络设备实现同步。
4、相关运算
本申请公开的实施例中，涉及到两种相关运算。
第一种，相关运算是两个序列之间对应元素的点乘、点除、共轭点乘或者共轭点除后，获得的序列。
本申请公开的实施例中，同步信号中的第一序列和第二序列之前的相关处理结果是基于第一种相关运算获得的。
第二种，相关运算是两个序列之间对应元素相乘后，将乘积分别相加后，获得一数值。该数值可以为复数，也可以是实数。
其中，两个序列之间对应元素相乘，可以是两个序列对应元素直接相乘，或者是两个序列对应元素的共轭相乘，或者是其中一个序列元素与其对应的另一个序列元素的共轭相乘。
可见，第一种相关运算的结果为一序列；第二种相关运算的结果为一数值。
例如，假设第一序列为{x 1,x 2,x 3,…,x m}，第二序列为{y 1,y 2,y 3,…,y m}，其中，m为每个序列的元素个数；第一序列中至少一个元素为复数，第二序列中至少一个元素也为复数。
以第一种相关运算是对应元素的点乘为例，第一序列和第二序列之间的相关运算结果为：{x 1y 1,x 2y 2,x 3y 3,…,x my m}，可见，该相关运算结果依旧为一复数序列。
基于第二种相关运算，第一序列和第二序列之间的相关运算结果为：x 1y 1+x 2y 2+x 3y 3+...+x my m，可见，该相关运算结果为一数值。
本申请公开的实施例以图1为例，阐述同步信号传输方法。请参阅图1，图1是本申请公开的实施例提供的一种无线通信系统的示意图。如图1所示，无线通信系统可包括：一个或多个网络设备(例如，一个或多个基站)，一个或多个终端设备。其中：网络设备可用于在网络设备控制器(未示出)的控制下，通过无线接口与终端通信。在一些实施例中，所述网络设备控制器可以是核心网的一部分，也可以集成到网络设备中。网络设备可用于通过回程(backhaul)接口向核心网传输控制信息或者用户数据。其中，图1所示的设备形态用于举例，也就是说，网络设备不限于基站，终端设备不限于手机。
如图1所示，网络设备通过无线接口，或者通过空口(air interface)与终端设备进行通信。终端设备与网络设备进行通信时，还需要实现与网络设备之间的同步。因此，本申请能够设计一种同步信号。网络设备向终端设备发送该同步信号。终端设备可根据该同步信号，与网络设备进行同步。
本申请公开的实施例中，同步信号包括第一序列和第二序列。其中，第一序列是第一复数序列，或是基于第一复数序列得到的序列；第二序列是基于第一复数序列得到的序列。第一序列不同于第二序列，且第一序列和第二序列之间的相关处理结果为复数序列。
在一种实施方式中，第一复数序列为Zadoff-Chu(ZC)序列；或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化(inverse fast fourier transformation,IFFT)或者快速傅里叶变化(fast fourier transformation,FFT)获得的序列。
在另一种实施方式中，第一复数序列也可以是基于复数序列变形得到的序列。该复数序列可以包括ZC序列、对ZC序列、或m序列、或Gold序列进行IFFT或者FFT获得的序列。比如，将上述复数序列经过循环移位扩展后形成的序列，作为第一复数序列。或者，将复数序列截断一部分元素后获得的序列，作为第一复数序列。或者，将复数序列的共轭序列，作为第一复数序列。或者，将复数序列进行相位旋转(即将上述序列的每个元素旋转一个给定的相位)后获得的序列，作为第一复数序列。或者，将多个复数序列相乘后获得的序列、共轭相乘后获得的序列、相加后获得的序列、模2相加后获得的序列等等，都可以作为第一复数序列。
需要说明的是，本申请实施例对第一复数序列或者复数序列的序列类型不作限制，第一复数序列为序列长度大于1且至少1个元素为复数的序列。其中，序列长度大于1，可以理解为序列包括的元素个数是大于1的。
在本申请实施例中，由于第一序列和第二序列是根据同一个第一复数序列得到的序列，因此通过第一序列和第二序列进行相关处理，可以抵消晶振稳定度差所导致的初始大频偏对同步估计性能的影响。
另外，上述所述的本地序列可以为第一复数序列。第一序列与第二序列之间的相关处理结果、本地序列均为复数序列。由于复数序列具有良好的自相关特性，因此，将相关处 理结果与本地序列进行相关运算时，能够获得尖锐的相关峰值，从而有利于缩短同步的时长，即缩短终端与网络设备同步所需要耗费的时间。
通常，同步信号包括的两个序列的相关处理结果为+1、-1构成的序列。由于+1、-1构成的序列的自相关特性不好，因此，与本地序列进行相关运算时，相关峰值不够陡峭。假设初始频偏误差为百万分之20(20parts per million，20ppm)，系统的中心频率为900MHz。同步信号在加性白色高斯噪声信道下的时域相关特征，如图2a所示，横轴为时序偏移，纵轴为归一化相关值(normalized correlation value)。基于图2a，可以观察到，频偏误差存在的情况下，虽然具有相关峰值特征，但如图2b所示，将该相关峰值放大时，可以观察到相关峰值不够陡峭，从而导致同步精度不高以及所需的同步时长较长。
如图3a、图3b所示，本申请涉及的同步信号中两个序列的相关处理结果为复数序列，比上述所述的+1、-1构成的序列，具有更好的自相关特性。因此，图3b在与图2b同样的仿真条件下，图3b具有更尖锐的相关峰值，从而能够减小同步所需的时长。
其中，纵轴表示的归一化相关值可以采用如下步骤计算获得。假设存在两个序列分别为：X序列与Y序列。根据如上描述的第二种相关运算对X序列和Y序列进行相关运算，获得一数值。其中，执行上述第二种相关运算时，X序列与Y序列之间对应元素不同，则得到的第二种相关运算的结果也会不同。通过变换对应元素，利用上述第二种相关运算，获得X序列和Y序列之间所有可能的相关运算结果。从所有可能的相关运算结果中，选择模值最大的相关运算结果，利用该最大模值除所有可能的相关运算结果的模值，得到的结果就为归一化相关值。
上述X序列和Y序列之间所有可能的相关运算结果，可以为，X序列中的至少一个元素与Y序列进行第二种的相关运算，获得的各相关运算结果；或者X序列与Y序列中的至少一个序列元素进行第二种的相关运算，获得的各相关运算结果。在本申请实施例中，复数的模值为复数的实部平方与虚部平方的和再取平方根。实数的模值为实数本身或实数的绝对值。
以下结合附图，对本申请公开的实施例所述的同步信号传输方法进行阐述。
本申请公开的实施例中，第一序列为第一时间单元上传输的序列；第二序列为第二时间单元上传输的序列。同步信号在时域上占用的资源包括N个时间单元，该N个时间单元包括第一时间单元和第二时间单元。N为大于或等于2的整数。
一种实施方式中，第一序列直接为第一复数序列，例如，术语部分所述的各种复数序列。另一种实施方式中，第一序列是基于所述第一复数序列和第一计算规则得到的序列。第二序列是基于所述第一复数序列和所述第一计算规则得到的序列。
在一种实施方式中，第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。其中，第一计算规则为序列对应元素之间的计算规则。其中，a*表示对a取共轭或a的共轭。以下对第一种相关运算或第一计算规则包括的各种计算规则进行举例阐述。
例如，假设A序列为{x 1,x 2,x 3,…,x m}，B序列为{y 1,y 2,y 3,…,y m}，则：
A序列和B序列采用点乘规则的计算结果为：
A.*B＝{x 1y 1,x 2y 2,x 3y 3,…,x my m}；
A序列和B序列采用共轭点乘规则的计算结果为：
Figure PCTCN2020110089-appb-000007
或者
Figure PCTCN2020110089-appb-000008
A序列和B序列采用共轭点除规则的计算结果为：
Figure PCTCN2020110089-appb-000009
或者，
Figure PCTCN2020110089-appb-000010
或者，
Figure PCTCN2020110089-appb-000011
或者，
Figure PCTCN2020110089-appb-000012
第一计算规则和上述第一种所述的相关运算，能够使得第一序列和第二序列的相关运算结果为复数序列。为阐述方便，以下第一复数序列记为Z序列。
例如，第一计算规则为点乘规则。第一序列可以为Z.*Z，其中，Z表示上述所述的Z序列；第二序列可以为Z.*Z.*Z。如果第一种相关运算为点除规则，则第一序列与第二序列之间的相关处理结果为：(Z.*Z.*Z)./(Z.*Z)＝Z。如果第一种相关运算为共轭点乘规则，则第一序列与第二序列之间的相关处理结果为：Z.*Z.*Z.*Z *.*Z *＝Z，或者Z.*Z.*Z.*Z *.*Z *＝c*Z。其中，c为常数，其中，Z *表示对Z包括的各个序列元素取共轭或Z的共轭。
再例如，第一计算规则为共轭点乘规则。第一序列可以为Z.*Z *；第二序列可以为Z.*Z *.*Z *。如果第一种相关运算为点除规则，则第一序列与第二序列之间的相关处理结果为：(Z.*Z *.*Z *)./(Z.*Z *)＝Z。如果第一种相关运算为共轭点乘规则，则第一序列与第二序列之间的相关处理结果为Z.*Z *.*(Z.*Z *.*Z *) *＝Z，或者Z.*Z *.*(Z.*Z *.*Z *) *＝c*Z。其中，c为常数。Z *表示对Z序列中各元素取共轭。
又例如，第一计算规则为共轭点除规则。第一序列可以为Z./Z *；第二序列可以为Z./(Z *.*Z *)。如果第一种相关运算为点除规则，则第一序列与第二序列之间的相关处理结果为：(Z./Z *)./(Z./(Z *.*Z *))＝Z *。
需要说明的是，当第一序列是基于所述第一复数序列和第一计算规则得到的序列时，本申请实施例不限定生成第一序列的过程中，第一计算规则使用的次数。可以理解为，只要在第一序列的生成过程中，使用了第一复数序列和至少运用了一次第一计算规则，就可以认为第一序列是基于所述第一复数序列和第一计算规则得到的序列。对于第二序列有相同的说明，此处不再赘述。
结合图4至图13，对同步信号可选的实施方式进行阐述。本申请公开的实施例中，该N个时间单元在时域上可以是连续的，也可以是不连续的。以下实施方式以连续的时间单元为例进行阐述。至于不连续的时间单元，每个时间单元上承载的序列也可以采用如下图4至图13所示的实施方式。
在一种实施方式中，该N个时间单元划分为至少两个时间单元组。该至少两个时间单元组的划分方式，可以为协议预定义或RRC配置的方式进行分组。至少两个时间单元组包括第一时间单元组和第二时间单元组。所述第一时间单元为所述第一时间单元组中的任一时间单元；所述第二时间单元为所述第二时间单元组中的任一时间单元。
在一种实施方式中，第一时间单元组为N个时间单元中，编号为奇数的时间单元构成的。第二时间单元组为N个时间单元中，编号为偶数的时间单元构成的。
在一种实施方式中，编号是指时间单元在该N个时间单元中的顺序。比如，时间单元的编号是指在基于时域上的先后顺序进行排列的N个时间单元中，该时间单元的排列顺序。也就是说，时间单元的编号可以用该时间单元在同步信号所包括的时间单元中的相对编号 来表示。
图4是本申请实施例提供的同步信号的一种示例图。图4中，以N个时间单元为符号2至6为例。第一序列为第一复数序列，记为Z序列为例。以第一计算规则为点乘规则，第二序列为Z.*Z为例。其中，符号m(在本例中，m为大于等于2且小于等于6的整数)中，m可以表示该符号在1个时隙(slot)内的索引号。在编号是时间单元在该N个时间单元中的顺序情况下，符号2的编号为1；符号3的编号为2；符号4的编号为3；符号5的编号为4；符号6的编号为5。编号为奇数的时间单元构成的第一时间单元组包括：符号2、符号4、符号6。编号为偶数的时间单元构成的第二时间单元组包括：符号3、符号5。
如图4所示，第一时间单元组中符号2、符号4以及符号6上承载的均为第一序列，即Z序列。如图4所示，第二时间单元组中符号3、符号5上承载的均为第二序列，即Z.*Z序列。图4所示的同步信号的图样序列也可以称为梳齿状排列的序列。
在另一种实施方式中，时间单元的编号也可以用该时间单元在无线资源上的绝对编号来表示。例如，假设时间单元为1个OFDM符号时，该时间单元的编号可以用该时间单元在1个时隙或者1个子帧，或者1个无线帧内的绝对编号来表示。
图5是本申请实施例提供的同步信号的另一示例图。在与图4同样的假设情况下，符号2的编号为2；符号3的编号为3；符号4的编号为4；符号5的编号为5；符号6的编号为6。第一时间单元组分别为：符号3、符号5。第二时间单元组分别为：符号2、符号4、符号6。如图5所示，第一时间单元组中符号3、符号5上承载的均为第一序列，即Z序列。第二时间单元组中符号2、符号4、符号6上承载的均为第二序列，即Z.*Z。
在另一种实施方式中，第一时间单元组是由N个时间单元中，时域在前的L个时间单元构成的；第二时间单元组是由N个时间单元中，时域在后的N-L个时间单元构成的；所述L为
Figure PCTCN2020110089-appb-000013
或
Figure PCTCN2020110089-appb-000014
图6是本申请实施例提供的同步信号的又一示例图。与图4同样的假设情况下，N等于5，L为
Figure PCTCN2020110089-appb-000015
即L等于3。第一时间单元组分别为：符号2、3、4；第二时间单元组分别为：符号5、6。如图6所示，第一时间单元组中符号2、3、4上承载的均为第一序列，即Z序列。第二时间单元组中符号5、6上承载的均为第二序列，即Z.*Z。
在又一种实施方式中，所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为第一复数序列。或，第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列。或，第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为第一复数序列；以及第一时间单元在所述N个时间单元中的编号M2大于1时，所述第一序列为第一复数序列。所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。所述第一时间单元在时域上位于所述第二时间单元之前。该实施方式中，时间单元的编号也可以有上述两种解释，此处不再详述。
图7是本申请实施例提供的同步信号的又一示例图。假设第一计算规则为点乘规则。第一复数序列记为Z序列。N个时间单元为图7中的符号2至6。符号的编号为以时域先 后顺序排列的5个符号中，该符号的顺序。符号2的编号为1；符号3的编号为2；符号4的编号为3；符号5的编号为4；符号6的编号为5。
在这种情况下，由于符号2的编号为1，因此符号2上承载的序列为第一复数序列，即Z序列。符号3至6上承载的序列，可根据符号的编号和第一计算规则确定。如图7所示，符号3的编号为2，因此，符号3上承载的序列为两个Z序列的点乘，即Z.*Z序列。符号4的编号为3，因此，符号4上承载的序列为三个Z序列的点乘，即Z.*Z.*Z序列。符号5的编号为4，因此，符号5上承载的序列为四个Z序列的点乘，即Z.*Z.*Z.*Z序列。符号6的编号为5，因此，符号6上承载的序列为五个Z序列的点乘，即Z.*Z.*Z.*Z.*Z序列。
图8是本申请实施例提供的同步信号的又一示例图。其中，图8与图7所假设的条件不同之处在于，图8中，符号的编号为符号在无线资源中的索引号。因此，符号2的编号为2；符号3的编号为3；符号4的编号为4；符号5的编号为5；符号6的编号为6。
在这种情况下，由于符号2的编号大于2，因此，符号2上承载的序列也是基于第一计算规则和2个第一复数序列获得，即Z.*Z序列。符号3至6上承载的序列，同样可根据符号的编号和第一计算规则确定。如图8所示，符号3的编号为3，符号3上承载的序列为三个Z序列的点乘，即Z.*Z.*Z序列。符号4的编号为4，符号4上承载的序列为四个Z序列的点乘，即Z.*Z.*Z.*Z序列。符号5的编号为5，符号5上承载的序列为五个Z序列的点乘，即Z.*Z.*Z.*Z.*Z序列。符号6的编号为6，符号6上承载的序列为六个Z序列的点乘，即Z.*Z.*Z.*Z.*Z.*Z序列。
在又一种实施方式中，第一序列为第一复数序列，或者，第一序列为基于第一复数序列和第一计算规则得到的序列。所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的。其中，第二时间单元为第一时间单元之后相邻的时间单元。也就是说，N个时间单元中，每个时间单元上承载的序列是该时间单元相邻的时间单元上承载的序列与第一复数序列进行第一计算规则获得的。
图9是本申请实施例提供的同步信号的又一示例图。如图9所示，假设第一计算规则为点乘规则。第一复数序列记为Z序列。第一序列为Z.*Z.*Z序列。N个时间单元为图9中的符号2至6。符号2上承载的第一序列为Z.*Z.*Z序列。在这种情况下，符号3上承载的序列为：符号2上承载的Z.*Z.*Z与Z之间的点乘，即(Z.*Z.*Z).*Z序列。符号4上承载的序列为：符号3上承载的Z.*Z.*Z.*Z与Z之间的点乘，即(Z.*Z.*Z.*Z).*Z序列。符号5上承载的序列为：符号4上承载的Z.*Z.*Z.*Z.*Z与Z之间的点乘，即(Z.*Z.*Z.*Z.*Z).*Z序列。符号6上承载的序列为：符号5上承载的Z.*Z.*Z.*Z.*Z.*Z与Z之间的点乘，即(Z.*Z.*Z.*Z.*Z.*Z).*Z序列。
上述各种实施方式中，图4至图9均以第一计算规则为点乘规则为例进行阐述的。可选的，上述图4至图9中的点乘规则也可以替换为上述所述的共轭点乘规则、共轭点除规则中的任一种。
在另一种实施方式中，同步信号在时域上所占的资源为N+K个时间单元。其中，该N个时间单元可采用上述图4-图9任一所述的实施方式。也就是说，本申请公开的实施例中，同步信号在时域上所占的资源中，部分时间单元上承载的序列为上述图4至图9所示的图 样序列时，依旧能够使得终端根据该部分时间单元上承载的序列，获得的相关处理结果为复数序列。进而，能够获得尖锐的相关峰值。其中，本申请实施例不对另外K个时间单元上承载的序列进行限定。
图10是本申请实施例提供的同步信号的又一示例图。如图10所示，假设第一计算规则为点乘规则。第一复数序列记为Z序列。同步信号在时域上所占的资源为图10所示的符号2至符号6。其中，符号3至符号6上承载的序列采用图9所示的实施方式。即：符号3上承载的为Z序列。符号4上承载的序列为符号3上承载的序列与Z序列之间的点乘，即Z.*Z序列。符号5上承载的序列为符号4上承载的序列与Z序列之间的点乘，即Z.*Z.*Z序列。符号6上承载的序列为符号5上承载的序列与Z序列之间的点乘，即Z.*Z.*Z.*Z序列。
其中，该实施方式中，针对该N个时间单元，时间单元的编号可依旧采用上述编号的相关定义确定各时间单元上承载的序列。可选的，该N个时间单元中每个时间单元的编号可放在N+K个时间单元的范围内确定。本申请公开的实施例不做限定。
在又一种实施方式中，同步信号包括第一序列和第二序列，但第一序列可为常数序列；第二序列为第一复数序列，或基于第一复数序列获得的序列。该实施方式中，第一序列和第二序列的相关处理结果依旧为复数序列，因此也能够获得尖锐的相关峰值。
图11是本申请实施例提供的同步信号的又一示例图。如图11所示，假设第一序列为全1序列；第二序列为第一复数序列，记为Z序列。同步信号在时域上所占的资源为符号2、3。符号2上承载第一序列，即全1序列。符号3上承载第二序列，即Z序列。可见，第一序列和第二序列的相关处理结果为Z序列(假设相关处理结果所采用的第一种相关运算为点乘规则)。该实施方式中，同步信号所占的符号数较少，适用于信道条件较好的场景，能够快速与网络设备进行同步。
在另一种实施方式中，该N个时间单元划分为至少两个时间单元组。该至少两个时间单元组的划分方式，如上所述，也可以为协议预定义或RRC配置的方式进行分组。至少两个时间单元组包括第一时间单元组和第二时间单元组。
但与上述实施方式中第一时间单元为所述第一时间单元组中的任一时间单元；以及第二时间单元为所述第二时间单元组中的任一时间单元不同的是：该实施方式中，第一时间单元组可采用上述各种实施方式，划分为第三时间单元组和第四时间单元组；其中，第一时间单元为第三时间单元组中的任一时间单元；第二时间单元为第四时间单元组中的任一时间单元；因此，第一时间单元组中各时间单元上承载的序列可以具有上述图4至图13任一个所述的序列图样。第二时间单元组也可以采用上述各种实施方式，划分为第五时间单元组和第六时间单元组；其中，第一时间单元为第五时间单元组中的任一时间单元；第二时间单元为第六时间单元组中的任一时间单元，因此，第二时间单元组中各时间单元上承载的序列也可以具有上述图4至图13任一个所述的序列图样。
也就是说，该N个时间单元可以划分为至少两个时间单元组，每个时间单元组都可单独采用上述实施方式中的任一种来确定该时间单元组中各时间单元上承载的序列。可选的，各时间单元组之间所采用的实施方式可以相同，也可以不同。
图12以各时间单元组之间所采用的实施方式相同为例，并且每个时间单元组采用上述 图4所示的实施方式为例。图13以各时间单元组之间采用的实施方式不同为例，并且第一时间单元组采用上述图4所示的实施方式为例，第二时间单元组采用上述图9所示的实施方式为例。
图12是本申请实施例提供的同步信号的又一示例图。假设N个时间单元为图13中的符号2至符号9。该N个时间单元分为两个时间单元组，第一时间单元组是符号2至符号5；第二时间单元组是符号6至符号9。
针对第一时间单元组，采用图4所示的实施方式，符号2的编号为1，符号3的编号为2，符号4的编号为3，符号5的编号为4。因此，如图12所示，符号2、符号4上承载的序列为Z序列；符号3、符号5上承载的序列为Z.*Z序列。
针对第二时间单元组，采用图4所示的实施方式，符号6的编号为1，符号7的编号为2，符号8的编号为3，符号9的编号为4。因此，如图12所示，符号6、符号8上承载的序列为Z序列；符号7、图9上承载的序列为Z.*Z序列。
请参阅图13，图13是本申请实施例提供的同步信号的又一示例图。假设N个时间单元为图13中的符号2至符号9。该N个时间单元分为两个时间单元组，第一时间单元组是符号2至符号5；第二时间单元组是符号6至符号9。
针对第一时间单元组，采用图4所示的实施方式，符号2的编号为1，符号3的编号为2，符号4的编号为3，符号5的编号为4。因此，如图11所示，符号2、符号4上承载的序列为Z序列；符号3、符号5上承载的序列为Z.*Z序列。
针对第二时间单元组，采用图9所示的实施方式，符号6为该组的起始符号，承载Z.*Z.*Z序列。以符号6为起始，依次确定相邻符号上承载的序列。如图13所示，符号7上承载的序列为：符号6上承载的Z.*Z.*Z与Z之间的点乘，即(Z.*Z.*Z).*Z序列。符号8上承载的序列为：符号7上承载的Z.*Z.*Z.*Z与Z之间的点乘，即(Z.*Z.*Z.*Z).*Z序列。符号9上承载的序列为：符号8上承载的Z.*Z.*Z.*Z.*Z与Z之间的点乘，即(Z.*Z.*Z.*Z.*Z).*Z序列。
可选的，在上述图12、图13所示的实施方式中，N个时间单元可以划分多个分组，例如P组，P为大于1的整数。其中，第2至第P-1组分别包括
Figure PCTCN2020110089-appb-000016
个时间单元，或者包括
Figure PCTCN2020110089-appb-000017
个时间单元。第1组包括
Figure PCTCN2020110089-appb-000018
个时间单元或者
Figure PCTCN2020110089-appb-000019
个时间单元。每组中各时间单元上承载的序列可按照上述图4至图13任一个所示的实施方式。
可见，上述图12、图13相关的实施方式有利于复用新空口系统的同步信号结构，会简化系统设计的复杂度。比如，新空口系统的同步信号包括四个序列，且在时域上占用四个符号。为了实现低功耗广域网的增强覆盖，需要重复传输同步信号以保证终端设备侧的接收性能，在低功耗广域网中，网络设备可以以四个符号为一组，重复传输多组，每组采用的同步信号的结构相同，如图12所示。或者，每组采用的同步信号的结构不同，如图13所示。从而能够大大降低重复传输中同步信号的时域结构，降低系统设计的复杂度。需要说明的是，这里重复传输的多组，网络设备在发送的时候可以采用相同的发射波束，或者采用不同的发射波束，来发送各组的同步信号。本申请实施例不作限定。
在另一种实施方式中，图12、图13中一组时间单元可以对应一个同步信号。即图12、图13中，网络设备能够发送两个同步信号，第一个同步信号在时域上占用符号2至符号5； 第二个同步信号在时域上占用符号6至符号9。可选的，网络设备发送的两个同步信号在时域上分别所占的资源之间可以为连续的，也可以为不连续的。
例如，图14为本申请公开的同步信号的示例图。图14中，第一个同步信号在时域上占用的资源为符号3至符号6。并且，符号3至符号6采用图7所示的实施方式确定各符号承载的序列。第二个同步信号在时域上占用的资源为符号9至符号12。并且，符号9至符号12也可以采用图7所示的实施方式确定各符号承载的序列。
再例如，图15为本申请公开的同步信号的示例图。图15中第一个同步信号和第二个同步信号所采用的时域资源与图14相同。但图15中，第一个同步信号和第二个同步信号之间的序列图样不同。即第一个同步信号采用图7所示的实施方式确定各符号承载的序列。第二个同步信号可采用图8所示的实施方式确定各符号承载的序列。
也就是说，本申请实施例中，网络设备可以发送多个同步信号。该多个同步信号之间所占时域资源可为连续的或不连续。针对每个同步信号，可采用上述图4至图13任一项所述的实施方式确定各时间单元承载的序列。
上述图4至图13相关的各种实施方式中，第一序列和第二序列的相关处理结果为复数序列。该复数序列可通过与本地序列之间的移位比特数，或者，通过与本地序列之间的不同的相关处理结果，表示小区的索引号和/或标识。小区索引号和/或标识可以理解为小区的身份信息，例如用Cell ID表示。
如果一个同步信号中第一序列与第二序列之间的相关处理结果不同于另外一个同步信号中第一序列与第二序列之间的相关处理结果，则可以利用这两个不同的相关处理结果来携带不同Cell ID。相应的，针对不同的相关处理结果，终端可以利用不同的本地序列，与不同的相关处理结果进行上述所述的第二种相关运算，得到不同的相关处理结果分别对应的最大值。
例如，针对第一个同步信号，该第一个同步信号中第一序列与第二序列之间的相关处理结果作为第一相关处理结果，终端利用本地序列1，与该第一相关处理结果进行第二种相关处理，可以得到一个最大值。针对第二个同步信号，该第二个同步信号中第一序列与第二序列之间的相关处理结果，作为第二相关处理结果，终端利用本地序列2，与该第二相关处理结果进行第二种相关处理，可以得到另一个最大值。因此，终端可以利用上述两个最大值中哪个最大，确定出网络设备发送的同步信号是基于第一相关处理结果对应的第一序列和第二序列，还是基于第二相关处理结果对应的第一序列和第二序列。可见，图4至图15所示的各种同步信号结构，相当于，网络设备发送的同步信号携带了1比特的信息。
由于复数序列可以提供更多相关特性好的序列，因此，本申请公开的实施例还可以通过序列携带更多的信息。例如，如果在新空口系统中使用本申请公开的实施例，新空口系统可以支持1008个小区ID。其中，网络设备可通过第一序列承载部分小区ID，或者承载决定小区ID的部分信息。
比如，新空口系统中，主同步信号采用本申请公开的同步信号结构，如上所述可承载1比特的信息，该比特信息的值为1或0；辅同步信号的设计复用窄带辅同步信号(Narrowband Secondary Synchronization Signal，NSSS)携带504个小区ID。这样，比特信息为0时，表示辅同步信号能够承载第1至504个小区ID；比特信息为1时，表示辅同 步信号能够承载第505至1008个小区ID，或者，比特信息为0时，表示辅同步信号能够承载第505至1008个小区ID；比特信息为1时，表示辅同步信号能够承载第1至504个小区ID。从而，使得主同步信号与辅同步信号可以共同决定1008个小区ID(该1008个小区ID的范围可以为0～1007)。其中，上述1008个小区ID也可以为其他信息，比如其他接入网络设备的必要信息等，本申请实施例不作限定。
以下结合上述各种实施方式，对本申请所述的同步信号传输方法进行阐述。
请参阅图16，图16是本申请实施例提供的一种同步信号传输方法的流程示意图。如图16所示，该同步信号传输方法可包括以下步骤：
101、网络设备生成同步信号，该同步信号包含第一序列和第二序列。
102、网络设备发送同步信号；终端接收来自网络设备的同步信号。
网络设备发送同步信号，可以包括：网络设备在第一时间单元上发送所述第一序列，在第二时间单元上发送所述第二序列；终端设备接收网络设备在第一时间单元上发送的第一序列以及第二时间单元上发送的第二序列。若该同步信号在时域上所占的资源包括多个时间单元，则网络设备可分在在每个时间单元上发送该时间单元承载的序列。
103、终端设备根据所述同步信号，与所述网络设备进行同步。
例如，终端设备根据第一序列和第二序列，与网络设备进行同步。
其中，所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
本申请实施例中，网络设备生成同步信号，可以包括：网络设备采用上述图4至图13任一项所述的实施方式确定第一时间单元上承载的第一序列和第二时间单元上承载的第二序列。
在一种实施方式中，以两个时间单元上发送序列为例阐述网络设备发送同步信号的过程。网络设备发送同步信号，可以包括：如图17所示，网络设备将第一序列中各元素映射到第一时间单元对应的各子载波上，以及将第二序列的各元素映射到第二时间单元对应的各子载波上；将映射后的各时间单元中的各子载波进行逆快速傅里叶变化IFFT，并插入循环前缀(cyclic prefix,CP)，来抵抗多径信道干扰，从而分别发送各时间单元上的时域信号。其中，第一序列中元素个数与第一时间单元对应的子载波个数可以相同，也可以不同。相应的，第二序列中元素个数与第二时间单元对应的子载波个数也可以相同或不同。
本申请实施例中，各时间单元对应的子载波是指同步信号在频域上所占的资源。
在另一种实施方式中，以两个时间单元上发送序列为例阐述网络设备发送同步信号的过程。网络设备发送同步信号，可以包括：如图18所示，网络设备先对第一序列进行L点的离散傅里叶变化DFT，该L可以为承载第一序列的第一时间单元对应的子载波个数，或者为基于第一时间单元对应的子载波个数获得的。同样的，对第二序列也进行L点的离散傅里叶变化DFT，该L为承载第二序列的第二时间单元对应的子载波个数，或者为基于第二时间单元对应的子载波个数获得的。然后，网络设备针对DFT后的第一序列映射到第一时间单元对应的各子载波上，以及DFT后的第二序列映射到第二时间单元对应的各子载波上。之后，网络设备分别将映射后的时域信号进行逆快速傅里叶变化IFFT，并插入循环前 缀CP，来抵抗多径信道干扰，从而分别发送各时间单元上的时域信号。
其中，第一时间单元对应的子载波个数是指第一时间单元传输第一序列所使用的子载波个数。同理，第二时间单元对应的子载波个数是指第二时间单元传输第二序列所使用的子载波个数。
可选的，在上述图17、图18两种实施方式中，还可以调整各子载波上元素的功率，以保证各时域信号在终端设备侧的接收性能。上述图17、图18两种实施方式中还可以进行其他处理，本申请实施例不做限定。另外，图17可适用于第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。图18可适用于第一复数序列为ZC序列。另外，上述图17和图18中逆快速傅里叶变化IFFT可替换为逆离散傅里叶变化(inverse discrete fourier transform，IDFT)。图18中快速傅里叶变化可替换为离散傅里叶变化(discrete fourier transform，DFT)。
在一种实施方式中，终端设备根据所述第一序列和第二序列，与网络设备进行同步，包括：终端设备对第一序列和第二序列执行第一种相关运算，获得相关处理结果；终端设备将该相关处理结果与本次序列执行第二种相关运算，获得相关峰值；终端设备根据该相关峰值所在的时域位置，与网络设备同步。本申请实施例中，第一序列和第二序列的相关处理结果依旧为复数序列，与通常的相关处理结果为+1、-1构成的序列相比，具有更好的自相关特性，因此，终端基于该相关处理结果与本地序列进行相关运算时，能够获得尖锐的相关峰值。如上述图2a、图2b、图3a以及图3b所示。
其中，尖锐的相关峰值不仅可以减少终端与网络设备同步实现时域同步所需要的时间，还可以辅助频偏估计获得更小的频偏误差。这是因为，终端如果可以在更精准的时间上接收到网络设备发送的同步信号，则进行频偏估计的时候，累计的有用信号能量就越高，这样就有助于频偏估计的时候减小频偏估计的误差。进一步地，终端更快地获取与网络设备的同步，还可以降低终端为了实现同步所需要耗费的时间，进而降低了终端的功耗。
本申请实施例还提供的一种同步信号传输方法。图16以两个时间单元为例阐述同步信号传输方法，该实施例以同步信号包括N个时间单元为例阐述。相应的，该同步信号传输方法中，同步信号包括N个序列。该同步信号传输方法可以包括：网络设备生成同步信号，该同步信号包括N个序列；其中，同步信号包括的N个序列可具有上述图4至图13所示的任一实施方式所述的序列图样。此处不再详述。网络设备发送该同步信号；终端设备接收来自网络设备的同步信号；其中，网络设备发送该同步信号，可针对N个时间单元，采用上述图17或图18所示的处理过程，发送该同步信号。此处不再详述。终端设备根据该同步信号，与网络设备进行同步。其中，终端设备根据同步信号，与网络设备进行同步，可依据图4至图13所示任一实施方式所述的序列图样，来进行相关处理，以与网络设备进行同步。可参见上述图16所示的相关内容。
其中，N为大于或等于2的整数。该N个序列包括图16所述的第一序列和第二序列。该N个时间单元包括图16所述的第一时间单元和第二时间单元。
本申请实施例中，终端设备可以根据与网络设备之间的信道状态，自适应地选择用于同步估计的时间单元数。例如，如果终端设备与网络设备之间的信道条件较好，则终端设备可以通过N个时间单元中的任意2个或3个时间单元的运算，实现和网络设备的同步。 如果信道条件较差，终端设备可以通过N个符号的运算，实现和网络设备的同步。因此，本申请公开的上述实施方式中的同步信号的结构，便于终端设备自适应地选择实现同步的时间单元个数，进而在信道条件好的时候，可以进一步降低同步所需要的时间。
在一种实施方式中，第二序列中的各个元素与第一序列各个元素之间具有如下关系：y k＝x kx k，其中k＝1,2,…,m。这样，第一序列和第二序列之间的相关运算结果与本次序列进行相关运算时，能够获得更加尖锐的相关峰值。
本申请公开的实施例即使在没有考虑网络设备发送的同步信号受信道、噪声、载波频偏(简称频偏)等非理想因素影响，可以理解的是，即使考虑了网络设备发送的同步信号会受信道、噪声、载波频偏(简称频偏)等非理想因素的影响，该同步信号与本地序列进行相关处理之后，仍然可以保留良好的自相关特性，即可以出现明显的相关峰值，以便于终端设备准确地确定定时位置。
上述本申请提供的实施例中，分别从网络设备、终端、以及网络设备和终端之间交互的角度对本申请实施例提供的方法进行了介绍。为了实现上述本申请实施例提供的方法中的各功能，网络设备和终端可以包括硬件结构和/或软件模块，以硬件结构、软件模块、或硬件结构加软件模块的形式来实现上述各功能。上述各功能中的某个功能以硬件结构、软件模块、还是硬件结构加软件模块的方式来执行，取决于技术方案的特定应用和设计约束条件。
请参阅图19，图19为本申请实施例提供的一种通信装置的结构示意图。
一种设计中，网络设备或支持网络设备实现上述方法的芯片、芯片系统、或处理器可采用如图19所示的通信装置结构，但也不限于图19所示的通信装置结构。
另一种设计中，图19所述的通信装置结构也可以用于终端设备或支持终端设备实现上述方法的芯片、芯片系统、或处理器，但上述终端设备或支持终端设备实现上述方法的芯片、芯片系统、或处理器也可以不限于图19所示的通信装置结构。
这里需要说明的是，终端侧的通信装置和网络设备侧的通信装置可以具有相同或相似的结构设计，即均可以参照图19所述的结构进行设计，因此不再对图19进行重复展示和赘述。本领域技术人员可知，上述阐述不代表应用图19的结构实现的通信装置既可以实现终端设备的功能又可以实现网络设备的功能。当该结构实现在终端设备侧时，其用于实现终端设备侧的功能。当该结构实现在网络设备侧时，其用于实现网络设备侧的功能。
基于上述涉及，图19所述的通信装置可用于实现上述方法实施例中描述的方法，可以参见上述方法实施例中的说明。
所述通信装置可以包括一个或多个处理器1901，所述处理器1901也可以称为处理单元，可以实现一定的控制功能。所述处理器1901可以是通用处理器或者专用处理器等。例如，所述处理器1901可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，基站、基带芯片，终端、终端芯片，DU或CU等)进行控制，执行软件程序，处理软件程序的数据。
在一种可选的设计中，处理器1901也可以存有指令和/或数据1903，所述指令和/或数据1903可以被所述处理器运行，使得所述通信装置1900执行上述方法实施例中描述的方 法。
在另一种可选的设计中，处理器1901中可以包括用于实现接收和发送功能的通信单元。例如该通信单元可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在又一种可能的设计中，通信装置1900可以包括电路，所述电路可以实现前述方法实施例中发送或接收或者通信的功能。
可选的，所述通信装置1900中可以包括一个或多个存储器1902，其上可以存有指令1904。所述指令可在所述处理器上被运行，使得所述通信装置1900执行上述方法实施例中描述的方法。可选的，所述存储器中还可以存储有数据。可选的，处理器中也可以存储指令和/或数据。所述处理器和存储器可以单独设置，也可以集成在一起。例如，上述方法实施例中所描述的本地序列可以存储在存储器中，或者存储在处理器中。
可选的，所述通信装置1900还可以包括收发器1905和/或天线1906。所述处理器1901可以称为处理单元，对所述通信装置1900进行控制。所述收发器1905可以称为通信单元、收发机、收发电路或者收发器等，用于实现收发功能。
在一种可能的设计中，一种通信装置1900(例如，网络设备、基站、基带芯片，DU或CU等)可包括：
处理器，用于生成同步信号，所述同步信号包含第一序列和第二序列；
收发器，用于发送所述同步信号；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
在一种实施方式中，计算第一序列和第二序列之间的相关处理结果所采用的相关运算，是两个序列之间对应元素之间的运算。第一序列和第二序列之间的相关处理结果为：第一序列和第二序列之间对应元素的点乘、点除、共轭点乘或者共轭点除后，获得的序列。
在一种实施方式中，所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。其中，第一计算规则也是两个序列之间对应元素之间的运算。
在一种实施方式中，所述第一复数序列为ZC序列；或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
第一序列、第二序列的相关内容可参见上述方法实施例的相关内容，此处不再详述。同步信号各种可选的实施方式可参见上述方法实施例中图4至图13所述的相关内容。处理器生成同步信号以及发送同步信号的处理过程可参见上述图16、图17、图18所述的相关 内容。此处均不再详述。
可见，该通信装置发送的同步信号，能够使得终端设备基于该同步信号获得的相关处理结果为复数序列，进而与本地序列进行相关运算时，能够获得尖锐的相关峰值。
在另一种可能的设计方式中，一种通信装置1900(例如，网络设备、基站、基带芯片，DU或CU等)可包括：
处理器，用于生成同步信号；该同步信号可以包括常数序列和第一序列；
收发器，用于发送同步信号；承载第一序列的第一时间单元与承载常数序列的第二时间单元不同。
其中，第一序列可为第一复数序列或基于第一复数序列得到的序列。其中，该常数序列和第一序列的相关处理结果为复数序列。因此，如图11所示，该方面所述的同步信号传输方法也能够获得更加尖锐的相关峰值。从而有利于节省同步所需的时长，实现快速同步。
在一种可能的设计中，一种通信装置1900(例如，集成电路、无线设备、电路模块，或终端设备等)可包括：
收发器，用于接收来自网络设备的同步信号；该同步信号包括第一序列和第二序列；
处理器，用于根据所述同步信号，与所述网络设备进行同步；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；
所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
在一种实施方式中，计算第一序列和第二序列之间的相关处理结果所采用的相关运算，是两个序列之间对应元素之间的运算。第一序列和第二序列之间的相关处理结果为：第一序列和第二序列之间对应元素的点乘、点除、共轭点乘或者共轭点除后，获得的序列。
在一种实施方式中，所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。其中，第一计算规则也是两个序列之间对应元素之间的运算。
在一种实施方式中，所述第一复数序列为ZC序列；或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
第一序列、第二序列的相关内容可参见上述方法实施例的相关内容，此处不再详述。同步信号各种可选的实施方式可参见上述方法实施例中图4至图13所述的相关内容。处理器生成同步信号以及发送同步信号的处理过程可参见上述图16、图17、图18所述的相关内容。此处均不再详述。
可见，终端设备能够根据该同步信号实现与网络设备同步时，获得更加尖锐的相关峰值。从而，有利于节省同步所需的时长，实现快速同步。
在另一种可能的设计中，一种通信装置1900(例如，集成电路、无线设备、电路模块，或终端设备等)可包括：
收发器，用于接收来自网络设备的同步信号；该同步信号可以包括常数序列和第一序列；
处理器，用于根据该同步信号，执行与网络设备的同步；承载第一序列的第一时间单元与承载常数序列的第二时间单元不同。
其中，第一序列可为第一复数序列或基于第一复数序列得到的序列。其中，该常数序列和第一序列的相关处理结果为复数序列。因此，如图11所示，该方面所述的同步信号传输方法也能够获得更加尖锐的相关峰值。从而有利于节省同步所需的时长，实现快速同步。
本申请中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。
图20提供了一种终端设备的结构示意图。该终端设备可适用于图1所示出的场景中。为了便于说明，图20仅示出了终端设备的主要部件。如图20所示，终端设备包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后，处理器可以读取存储单元中的软件程序，解析并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行处理后得到射频信号并将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，该射频信号被进一步转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
为了便于说明，图20仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为可读存储介质或者存储设备等，本申请实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。
在一个例子中，可以将具有收发功能的天线和控制电路视为终端设备的通信单元2011，将具有处理功能的处理器视为终端设备的处理单元2012。如图20所示，终端设备包括通信单元2011和处理单元2012。通信单元也可以称为收发器、收发机、收发装置等。可选的，可以将通信单元2011中用于实现接收功能的器件视为接收单元，将通信单元2011中用于实现发送功能的器件视为发送单元，即通信单元2011包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。可选的，上述接收单元和发送单元可以是集成在一起的一个单元，也可以是各自独立的多个单元。上述接收单元和发送单元可以在一个地理位置，也可以分散在多个地理位置。
如图21所示，本申请实施例提供了另一种通信装置2100。该通信装置可以是终端,也可以是终端的部件(例如，集成电路，芯片等等)。或者，该通信装置可以是网络设备，也可以是网络设备的部件(例如，集成电路，芯片等等)。该通信装置也可以是其他通信单元，用于实现本申请方法实施例中的方法。该通信装置2100可以包括：处理单元2102。可选的，还可以包括通信单元2101和存储单元2103。
在一种可能的设计中，如图21中的一个或者多个单元可能由一个或者多个处理器来实现，或者由一个或者多个处理器和存储器来实现；或者由一个或多个处理器和收发器实现；或者由一个或者多个处理器、存储器和收发器实现，本申请实施例对此不作限定。所述处理器、存储器、收发器可以单独设置，也可以集成。
所述通信装置具备实现本申请实施例描述的终端设备或网络设备的功能。比如，所述通信装置包括终端设备执行本申请实施例描述的终端设备涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。详细可进一步参考前述对应方法实施例中的相应描述。
在一种可能的设计中，一种通信装置2100可包括:
通信单元2101，用于接收来自网络设备的同步信号；
处理单元2102，用于根据所述同步信号，与所述网络设备进行同步；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；
所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
第一序列、第二序列的相关内容可参见上述方法实施例的相关内容，此处不再详述。同步信号各种可选的实施方式可参见上述方法实施例中图4至图13所述的相关内容。处理器生成同步信号以及发送同步信号的处理过程可参见上述图16、图17、图18所述的相关内容。此处均不再详述。
可见，该同步信号有利于实现与网络设备同步时，获得更加尖锐的相关峰值。从而，有利于节省同步所需的时长，实现快速同步。
在另一种可能的设计中，一种通信装置2100可包括:
处理单元2102，用于生成同步信号，所述同步信号包含第一序列和第二序列；
通信单元2101，用于发送所述同步信号；
其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；
所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
第一序列、第二序列的相关内容可参见上述方法实施例的相关内容，此处不再详述。同步信号各种可选的实施方式可参见上述方法实施例中图4至图13所述的相关内容。处理 器生成同步信号以及发送同步信号的处理过程可参见上述图16、图17、图18所述的相关内容。此处均不再详述。
可见，终端设备基于该同步信号实现与网络设备同步时，获得更加尖锐的相关峰值。从而，有利于节省同步所需的时长，实现快速同步。
在又一种可能的设计方式中，一种通信装置2100可包括：
处理单元2102，用于生成同步信号；该同步信号可以包括常数序列和第一序列；
通信单元2101，用于发送同步信号；承载第一序列的第一时间单元与承载常数序列的第二时间单元不同。
其中，第一序列可为第一复数序列或基于第一复数序列得到的序列。其中，该常数序列和第一序列的相关处理结果为复数序列。因此，如图11所示，该方面所述的同步信号传输方法也能够获得更加尖锐的相关峰值。从而有利于节省同步所需的时长，实现快速同步。
在又一种可能的设计中，一种通信装置2100可包括：
通信单元2101，用于接收来自网络设备的同步信号；该同步信号可以包括常数序列和第一序列；
处理单元2102，用于根据该同步信号，与网络设备进行同步；承载第一序列的第一时间单元与承载常数序列的第二时间单元不同。
其中，第一序列可为第一复数序列或基于第一复数序列得到的序列。其中，该常数序列和第一序列的相关处理结果为复数序列。因此，如图11所示，该方面所述的同步信号传输方法也能够获得更加尖锐的相关峰值。从而有利于节省同步所需的时长，实现快速同步。
可以理解的是，本申请实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，比如其当前所基于的方案，而独立实施，解决相应的技术问题，达到相应的效果，也可以在某些场景下，依据需求与其他特征进行结合。相应的，本申请实施例中给出的通信装置也可以相应的实现这些特征或功能，在此不予赘述。
本领域技术人员还可以了解到本申请实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。
应理解，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，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。
可以理解，本申请实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态 随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请还提供了一种计算机可读介质，其上存储有计算机程序，该计算机程序被计算机执行时实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (39)

  1. 一种通信方法，应用于终端设备，其特征在于，所述方法包括：
    生成同步信号，所述同步信号包含第一序列和第二序列；
    发送所述同步信号；
    其中，承载所述第一序列的第一时间单元与承载所述第二序列的第二时间单元不同；
    所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
    所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
  2. 如权利要求1所述的方法，其特征在于，
    所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；
    所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；
    所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。
  3. 如权利要求1或2所述的方法，其特征在于，所述同步信号在时域上占用的资源包括第一时间单元组和第二时间单元组；
    所述第一时间单元为所述第一时间单元组中的任一时间单元；
    所述第二时间单元为所述第二时间单元组中的任一时间单元。
  4. 如权利要求3所述的方法，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述N为大于或等于2的整数；
    所述第一时间单元组是由所述N个时间单元中，编号为奇数的时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，编号为偶数的时间单元构成的。
  5. 如权利要求3所述的方法，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；
    所述第一时间单元组是由所述N个时间单元中，时域在前的L个时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，时域在后的N-L个时间单元构成的；
    所述N为大于或等于2的整数；所述L为
    Figure PCTCN2020110089-appb-100001
    或
    Figure PCTCN2020110089-appb-100002
  6. 如权利要求2所述的方法，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元在时域上位于所述第二时间单元之前；
    所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列；和/或，所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列；
    所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述 M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。
  7. 如权利要求1至5任一项所述的方法，其特征在于，所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的；所述第二时间单元为与所述第一时间单元相邻的时间单元。
  8. 如权利要求1至6任一项所述的方法，其特征在于，
    所述第一复数序列为ZC序列；
    或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
  9. 一种同步信号传输方法，其特征在于，包括：
    接收来自网络设备的同步信号；所述同步信号包括第一序列和第二序列；
    根据所述同步信号，执行与所述网络设备的同步；
    其中，承载所述第一序列的第一时间单元与承载所述第二序列的第二时间单元不同；
    所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
    所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
  10. 如权利要求9所述的方法，其特征在于，
    所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；
    所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；
    所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。
  11. 如权利要求9或10所述的方法，其特征在于，所述同步信号在时域上占用的资源包括第一时间单元组和第二时间单元组；
    所述第一时间单元为所述第一时间单元组中的任一时间单元；
    所述第二时间单元为所述第二时间单元组中的任一时间单元。
  12. 如权利要求11所述的方法，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述N为大于或等于2的整数；
    所述第一时间单元组是由所述N个时间单元中，编号为奇数的时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，编号为偶数的时间单元构成的。
  13. 如权利要求11所述的方法，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；
    所述第一时间单元组是由所述N个时间单元中，时域在前的L个时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，时域在后的N-L个时间单元构成的；
    所述N为大于或等于2的整数；所述L为
    Figure PCTCN2020110089-appb-100003
    或
    Figure PCTCN2020110089-appb-100004
  14. 如权利要求10所述的方法，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元在时域上位于所述第二时间单元之前；
    所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列；或，所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列；
    所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。
  15. 如权利要求9至13任一项所述的方法，其特征在于，所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的；所述第二时间单元为与所述第一时间单元相邻的时间单元。
  16. 如权利要求9至14任一项所述的方法，其特征在于，
    所述第一复数序列为ZC序列；
    或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
  17. 一种通信装置，其特征在于，包括：
    处理单元，用于生成同步信号，所述同步信号包含第一序列和第二序列；
    通信单元，用于发送所述同步信号；
    其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
    所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关处理结果为复数序列。
  18. 如权利要求17所述的装置，其特征在于，
    所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。
  19. 如权利要求17或18所述的装置，其特征在于，所述同步信号在时域上占用的资源包括第一时间单元组和第二时间单元组；
    所述第一时间单元为所述第一时间单元组中的任一时间单元；
    所述第二时间单元为所述第二时间单元组中的任一时间单元。
  20. 如权利要求19所述的装置，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述N为大于或等于2的整数；
    所述第一时间单元组是由所述N个时间单元中，编号为奇数的时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，编号为偶数的时间单元构成的。
  21. 如权利要求19所述的装置，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；
    所述第一时间单元组是由所述N个时间单元中，时域在前的L个时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，时域在后的N-L个时间单元构成的；
    所述N为大于或等于2的整数；所述L为
    Figure PCTCN2020110089-appb-100005
    或
    Figure PCTCN2020110089-appb-100006
  22. 如权利要求18所述的装置，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元在时域上位于所述第二时间单元之前；
    所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列；和/或，所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列；
    所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。
  23. 如权利要求17至21任一项所述的装置，其特征在于，所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的；所述第二时间单元为与所述第一时间单元相邻的时间单元。
  24. 如权利要求17至22任一项所述的装置，其特征在于，
    所述第一复数序列为ZC序列；
    或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
  25. 一种通信装置，其特征在于，包括：
    通信单元，用于接收来自网络设备的同步信号；
    处理单元，用于根据所述同步信号，与所述网络设备进行同步；
    其中，承载第一序列的第一时间单元与承载第二序列的第二时间单元不同；
    所述第一序列是第一复数序列，或是基于所述第一复数序列得到的序列；所述第二序列是基于所述第一复数序列得到的序列；
    所述第一序列不同于所述第二序列，以及，所述第一序列与所述第二序列之间的相关 处理结果为复数序列。
  26. 如权利要求25所述的装置，其特征在于，
    所述第一序列是基于所述第一复数序列和第一计算规则得到的序列；
    所述第二序列是基于所述第一复数序列和所述第一计算规则得到的序列；
    所述第一计算规则包括点乘规则、共轭点乘规则、共轭点除规则中的任一种。
  27. 如权利要求25或26所述的装置，其特征在于，所述同步信号在时域上占用的资源包括第一时间单元组和第二时间单元组；
    所述第一时间单元为所述第一时间单元组中的任一时间单元；
    所述第二时间单元为所述第二时间单元组中的任一时间单元。
  28. 如权利要求27所述的装置，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述N为大于或等于2的整数；
    所述第一时间单元组是由所述N个时间单元中，编号为奇数的时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，编号为偶数的时间单元构成的。
  29. 如权利要求27所述的装置，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；
    所述第一时间单元组是由所述N个时间单元中，时域在前的L个时间单元构成的；
    所述第二时间单元组是由所述N个时间单元中，时域在后的N-L个时间单元构成的；
    所述N为大于或等于2的整数；所述L为
    Figure PCTCN2020110089-appb-100007
    或
    Figure PCTCN2020110089-appb-100008
  30. 如权利要求26所述的装置，其特征在于，所述同步信号在时域上占用的资源包括N个时间单元；所述第一时间单元在时域上位于所述第二时间单元之前；
    所述第一时间单元在所述N个时间单元中的编号M1等于1时，所述第一序列为所述第一复数序列；或，所述第一时间单元在所述N个时间单元中的编号M1大于1时，所述第一序列为基于所述第一计算规则和M1个所述第一复数序列得到的序列；
    所述第二序列为基于所述第一计算规则和M2个所述第一复数序列得到的序列，所述M2为所述第二时间单元在所述N个时间单元中的编号，所述M2为大于1的整数。
  31. 如权利要求25至29任一项所述的装置，其特征在于，所述第二序列是所述第一序列和所述第一复数序列进行所述第一计算规则获得的；所述第二时间单元为与所述第一时间单元相邻的时间单元。
  32. 如权利要求25至30任一项所述的装置，其特征在于，
    所述第一复数序列为ZC序列；
    或者，所述第一复数序列为对所述ZC序列，或m序列，或Gold序列进行逆快速傅里叶变化IFFT或者快速傅里叶变化FFT获得的序列。
  33. 一种通信装置，其特征在于，包括处理器和通信接口，所述通信接口用于与其它通信装置进行通信；所述处理器用于运行程序，以使得所述通信装置实现权利要求1至8任一项所述的方法，或者权利要求9至16任一项所述的方法。
  34. 一种装置，其特征在于，用于实现如权利要求1至8任一项所述的方法，或者权利要求9至16任一项所述的方法。
  35. 一种装置，其特征在于，包括处理器和存储器，所述存储器和所述处理器耦合，所述处理器用于执行权利要求1至8任一项所述的方法，权利要求9至16任一项所述的方法。
  36. 一种通信系统，其特征在于，包括权利要求17至24任一项所述的装置，和权利要求25至32任一项所述的装置。
  37. 一种计算机可读存储介质，其特征在于，包括指令，当其在计算机上运行时，使得计算机执行权利要求1至8任一项所述的方法；或者使得计算机执行权利要求9至16任一项所述的方法。
  38. 一种计算机程序产品，其特征在于，包括指令，当其在计算机上运行时，使得计算机执行权利要求1至8任一项所述的方法；或者使得计算机执行权利要求9至16任一项所述的方法。
  39. 一种芯片，其特征在于，包括处理器和接口，所述接口用于获取程序或指令，所述处理器用于调用所述程序或指令以执行权利要求1至8任一项所述的方法；或者以执行权利要求9至16任一项所述的方法。
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