WO2020030031A1 - 一种同步信号的传输方法和装置 - Google Patents
一种同步信号的传输方法和装置 Download PDFInfo
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- WO2020030031A1 WO2020030031A1 PCT/CN2019/099724 CN2019099724W WO2020030031A1 WO 2020030031 A1 WO2020030031 A1 WO 2020030031A1 CN 2019099724 W CN2019099724 W CN 2019099724W WO 2020030031 A1 WO2020030031 A1 WO 2020030031A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0022—PN, e.g. Kronecker
- H04J13/0025—M-sequences
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0074—Code shifting or hopping
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- 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
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0073—Acquisition of primary synchronisation channel, e.g. detection of cell-ID within cell-ID group
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
- H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
- H04J11/0076—Acquisition of secondary synchronisation channel, e.g. detection of cell-ID group
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/46—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/002—Mutual synchronization
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
Definitions
- Embodiments of the present application relate to the field of communications, and in particular, to a method and an apparatus for transmitting a synchronization signal.
- V2V Device-to-Device
- V2V Vehicle-to-Vehicle
- V2P Vehicle-to-Pedestrian
- V2I / N Vehicle-to-Infrastructure / Network
- the basic of D2D and V2X communication is to achieve synchronization between the terminal devices that need to communicate.
- the synchronization signal between the terminal devices may be interfered by the synchronization signal on the cellular link.
- the synchronization signal between D2D and V2X devices may also interfere with the cellular chain
- the transmission of synchronization signals on the road causes the synchronization performance between devices to decrease.
- the embodiments of the present application provide a method and an apparatus for transmitting a synchronization signal, which can improve synchronization performance between devices.
- an embodiment of the present application provides a method for sending a synchronization signal.
- a first device generates a first synchronization sequence and / or a second synchronization sequence, wherein the first synchronization sequence and the third synchronization sequence in a set Any sequence is different, and / or, the second synchronization sequence is different from any sequence in the fourth synchronization sequence set; any sequence in the third synchronization sequence set satisfies:
- the synchronization sequence obtained by the method provided in the embodiment of the present application can be different from any synchronization sequence in the synchronization sequence set in the 5G NR system, effectively reducing the synchronization signals of other source synchronization devices and the synchronization on the Uu link in the NR system Interference between signals, thus improving synchronization performance between devices.
- the first synchronization sequence is different from any sequence in the third synchronization sequence set, including the cyclic shift of the first synchronization sequence to any sequence in the third synchronization sequence set ; And / or, a generator polynomial corresponding to the first synchronization sequence is different from a generator polynomial corresponding to any sequence in the third synchronization sequence set.
- ⁇ is a non-zero integer.
- the value of ⁇ is greater than 0 and less than A.
- said Or said R is a positive integer, Means round down, Rounds up.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in the third synchronization sequence set, and the generator polynomial corresponding to the first synchronization sequence is [K 6 , K 5 , K 4 , K 3 , K 2 , K 1 , K 0 ] ⁇ [0,0,1,0,0,0,1], and K is an integer, where x (0) ⁇ x (6) is the initial value.
- the second synchronization sequence satisfies:
- the second synchronization sequence is different from any sequence in the fourth synchronization sequence set, including the sequence For sequence Cyclic shift, and / or, sequence For sequence And / or, the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any sequence in the fourth synchronization sequence set.
- the second synchronization sequence satisfies among them ⁇ is a non-zero integer.
- the ⁇ ⁇ 45, or the ⁇ is greater than zero and not an integer multiple of 5, or the ⁇ is greater than or equal to 45 and an integer multiple of 5.
- the ⁇ 45.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the generator polynomial corresponding to the second synchronization sequence includes
- x 1 (i + 7) (x 1 (i + 3) + x 1 (i + 2) + x 1 (i + 1) + x 1 (i)) mod 2 where x 1 (0) ⁇ x 1 (6) is the initial value.
- the method further includes determining a synchronization signal identifier N ID from a synchronization signal identifier set; and determining a first identifier according to the synchronization signal identifier N ID. And / or second logo among them
- the synchronization signal identifier set includes one or more subsets, and the synchronization signal identifiers in the subset indicate at least one of the following information:
- the timing reference of the first device is a network device
- the timing reference of the first device is a second device that uses a network device as a timing parameter
- the timing reference of the first device is a satellite
- the timing reference of the first device is a second device using the satellite as a timing parameter
- the timing reference of the first device is the second device that uses the first device itself or is not synchronized to a network device or satellite.
- an embodiment of the present application provides a method for receiving a synchronization signal, which is applied to a second device.
- the method includes receiving a first synchronization signal corresponding to a first synchronization sequence and / or a second synchronization signal corresponding to a second synchronization sequence; wherein the first synchronization sequence is different from any sequence in a third synchronization sequence set , And / or, the second synchronization sequence is different from any sequence in the fourth synchronization sequence set; any sequence in the third synchronization sequence set satisfies:
- the first synchronization sequence is different from any sequence in the third synchronization sequence set, including that the first synchronization sequence is a cyclic shift of any sequence in the third synchronization sequence set And / or, the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in the third synchronization sequence set.
- the value of ⁇ is greater than 0 and less than 43.
- said Or said R is a positive integer, Means round down, Rounds up.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in the third synchronization sequence set, including that the generator polynomial corresponding to the first synchronization sequence is [K 6 , K 5 , K 4 , K 3 , K 2 , K 1 , K 0 ] ⁇ [0,0,1,0,0,0,1], and K is an integer, where x (0) ⁇ x (6) is the initial value.
- the second synchronization sequence satisfies:
- the second synchronization sequence is different from any sequence in the fourth synchronization sequence set, and includes:
- sequence For sequence Cyclic shift, and / or, sequence For sequence And / or, the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any sequence in the fourth synchronization sequence set.
- the second synchronization sequence satisfies among them ⁇ is a non-zero integer.
- the ⁇ ⁇ 45, or the ⁇ is greater than zero and not an integer multiple of 5, or the ⁇ is greater than or equal to 45 and an integer multiple of 5.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the method further includes determining a timing reference source of the first device according to the synchronization signal identifier N ID .
- acquiring the synchronization signal identifier N ID according to the first synchronization information and / or the second synchronization information includes determining the first identifier according to the first synchronization signal and / or the second synchronization signal. And / or second logo According to the first identification And / or the second identification Determine the synchronization signal identification N ID , where: or
- an embodiment of the present invention provides a device for sending a synchronization signal, including a processor, a memory and a transceiver coupled to the processor; wherein,
- the processor is configured to generate a first synchronization sequence and / or a second synchronization sequence, wherein the first synchronization sequence is different from any sequence in a third synchronization sequence set, and / or the second synchronization sequence Different from any sequence in the fourth synchronization sequence set; any sequence in the third synchronization sequence set satisfies:
- the transceiver is configured to send a first synchronization signal corresponding to the first synchronization sequence and / or a second synchronization signal corresponding to the second synchronization sequence.
- the first synchronization sequence is different from any sequence in the third synchronization sequence set, including that the first synchronization sequence is a cyclic shift of any sequence in the third synchronization sequence set And / or, the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in the third synchronization sequence set.
- the value of ⁇ is greater than 0 and less than A.
- said Or said R is a positive integer, Means round down, Rounds up.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in the third synchronization sequence set, including:
- the generator polynomial corresponding to the first synchronization sequence is [K 6 , K 5 , K 4 , K 3 , K 2 , K 1 , K 0 ] ⁇ [0,0,1,0,0,0,1], and K is an integer, where x (0) ⁇ x (6) is the initial value.
- the second synchronization sequence satisfies:
- the second synchronization sequence is different from any sequence in the fourth synchronization sequence set, and includes:
- sequence For sequence Cyclic shift, and / or, sequence For sequence And / or, the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any sequence in the fourth synchronization sequence set.
- the second synchronization sequence satisfies among them ⁇ is a non-zero integer.
- the ⁇ ⁇ 45, or the ⁇ is greater than zero and not an integer multiple of 5, or the ⁇ is greater than or equal to 45 and an integer multiple of 5.
- the ⁇ 45.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any sequence in the fourth synchronization sequence set, including the generator polynomial corresponding to the second synchronization sequence include
- x 1 (i + 7) (x 1 (i + 3) + x 1 (i + 2) + x 1 (i + 1) + x 1 (i)) mod 2 where x 1 (0) ⁇ x 1 (6) is the initial value.
- the processor is further configured to determine a synchronization signal identifier N ID from a synchronization signal identifier set; the processor is further configured to determine a first identifier according to the synchronization signal identifier N ID And / or second logo among them
- the synchronization signal identifier set includes one or more subsets, and the synchronization signal identifiers in the subset indicate at least one of the following information:
- the timing reference of the first device is a network device
- the timing reference of the first device is a second device that uses a network device as a timing parameter
- the timing reference of the first device is a satellite
- the timing reference of the first device is a second device using the satellite as a timing parameter
- the timing reference of the first device is the second device that uses the first device itself or is not synchronized to a network device or satellite.
- an embodiment of the present invention provides a device for receiving a synchronization signal, including a processor, a memory and a transceiver coupled to the processor; wherein,
- the transceiver is configured to receive a first synchronization signal corresponding to a first synchronization sequence and / or a second synchronization signal corresponding to a second synchronization sequence; wherein the first synchronization sequence and any one of a third synchronization sequence set Different, and / or, the second synchronization sequence is different from any sequence in the fourth synchronization sequence set; any sequence in the third synchronization sequence set satisfies:
- the processor is configured to obtain a synchronization signal identifier N ID according to the first synchronization sequence and / or the second synchronization sequence.
- the first synchronization sequence is different from any sequence in the third synchronization sequence set, including that the first synchronization sequence is a cyclic shift of any sequence in the third synchronization sequence set And / or, the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in the third synchronization sequence set.
- the value of ⁇ is greater than 0 and less than 43.
- said Or said R is a positive integer, Means round down, Rounds up.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in the third synchronization sequence set.
- the generator polynomial corresponding to the first synchronization sequence is [K 6 , K 5 , K 4 , K 3 , K 2 , K 1 , K 0 ] ⁇ [0,0,1,0,0,0,1], and K is an integer, where x (0) ⁇ x (6) is the initial value.
- the second synchronization sequence satisfies:
- the second synchronization sequence is different from any sequence in the fourth synchronization sequence set, and includes:
- sequence For sequence Cyclic shift, and / or, sequence For sequence And / or, the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any sequence in the fourth synchronization sequence set.
- the second synchronization sequence satisfies among them ⁇ is a non-zero integer.
- the ⁇ ⁇ 45, or the ⁇ is greater than zero and not an integer multiple of 5, or the ⁇ is greater than or equal to 45 and an integer multiple of 5.
- the ⁇ 45.
- the ⁇ is indicated by signaling, or the ⁇ is predefined.
- the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any sequence in the fourth synchronization sequence set, including:
- the generator polynomial corresponding to the second synchronization sequence includes
- x 1 (i + 7) (x 1 (i + 3) + x 1 (i + 2) + x 1 (i + 1) + x 1 (i)) mod 2 where x 1 (0) ⁇ x 1 (6) is the initial value.
- the processor is further configured to determine a timing reference source of the first device according to the synchronization signal identifier N ID .
- the processor is configured to obtain the synchronization signal identifier N ID according to the first synchronization information and / or the second synchronization information, including:
- the processor is configured to determine a first identifier according to a first synchronization signal and / or the second synchronization signal And / or second logo
- the processor is configured to, according to the first identifier And / or the second identification Determine the synchronization signal identification N ID , where: or
- the first device may be a terminal device, a network device, or a device that executes the foregoing method in the terminal device or the network device.
- the second device may be a terminal device, a network device, or a device that executes the foregoing method in the terminal device or the network device.
- a communication device configured to perform a function of the behavior of the first device or the second device in the foregoing method.
- These functions can be realized by hardware, and can also be implemented by hardware executing corresponding software.
- the hardware or software includes one or more units corresponding to the functions described above.
- a computer storage medium containing instructions which when run on a computer, causes the computer to perform a function of the behavior of the first device or the second device in the above method.
- FIG. 1 is a schematic architecture diagram of a wireless communication system according to an embodiment of the present application.
- FIG. 2 is a schematic diagram of a possible structure of a network device in an embodiment of the present application.
- FIG. 3 is a schematic diagram of a possible structure of a terminal device in an embodiment of the present application.
- FIG. 4 is a schematic diagram showing an interval of different cyclic shift values based on an m sequence in an embodiment of the present application.
- FIG. 5 is a schematic signaling diagram of a method provided by an embodiment of the present application.
- One in the embodiments of the present invention means a single individual, and does not mean that it can only be one individual, and cannot be applied to other individuals.
- a terminal device in the embodiments of the present invention refers to a certain terminal device, and does not mean that it can only be applied to a specific terminal device.
- system may be used interchangeably with "network.”
- references to "one embodiment” (or “an implementation") or “an embodiment” (or “an implementation”) in this application means that a particular feature, structure, characteristic, etc. described in connection with the embodiment is included in at least one embodiment .
- the appearance of "in one embodiment” or “in an embodiment” in various places in the specification does not mean that they all refer to the same embodiment.
- "One” in the embodiments of the present invention means a single individual, and does not mean that it can only be one individual, and cannot be applied to other individuals.
- a terminal device in the embodiments of the present invention refers to a certain terminal device, and does not mean that it can only be applied to a specific terminal device.
- the term “system” may be used interchangeably with "network.”
- references to "one embodiment” (or “an implementation") or “an embodiment” (or “an implementation”) in this application means that a particular feature, structure, characteristic, etc. described in connection with the embodiment is included in at least one embodiment .
- the appearance of "in one embodiment” or “in an embodiment” in various places in the specification does not mean that they all refer to the same embodiment.
- such a phrase includes any of the six schemes, that is, includes A but not including B and C, including B but not including A and C, including C but not including A and B, including A and B but not including C, including B and C but not including A , Including A and C but not B, and the three options A, B, and C.
- the embodiments of the present invention can be understood in the foregoing manner.
- the wireless communication system may be a system using various radio access technologies (radio access technologies, RATs), such as code division multiple access (CDMA), time division multiple access (TDMA), Frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), or single carrier frequency division multiple access (FDMA, SC-FDMA) and other systems .
- radio access technologies such as code division multiple access (CDMA), time division multiple access (TDMA), Frequency division multiple access (FDMA), orthogonal frequency-division multiple access (OFDMA), or single carrier frequency division multiple access (FDMA, SC-FDMA) and other systems .
- CDMA code division multiple access
- TDMA time division multiple access
- FDMA Frequency division multiple access
- OFDMA orthogonal frequency-division multiple access
- SC-FDMA single carrier frequency division multiple access
- the wireless communication system can be a long term evolution (LTE) system, a CDMA system, a wideband code division multiple access (WCDMA) system, a global system for mobile communications (GSM) system, and a wireless local area network (GSM).
- LTE long term evolution
- CDMA compact code division multiple access
- WCDMA wideband code division multiple access
- GSM global system for mobile communications
- GSM wireless local area network
- WLAN wireless local area network
- 5G 5th Generation
- NR New Radio
- FIG. 1 shows a possible scenario in which there is one network device 101 and three terminal devices 102, 103, and 104.
- the network device 101 and the terminal device 103 are two different source synchronization devices in the same wireless communication system.
- the network device 101 may be a base station in a cellular network
- the terminal devices 102, 103, and 104 may be an in-vehicle wireless communication device or a mobile phone, and the terminal devices 102, 103, and 104 may perform wireless communication with a base station, and the communication devices 102, 103, and 104 may also perform direct communication between terminal devices.
- the network device 101 sends a synchronization signal 2 to the terminal devices 102, 103, and 104.
- the terminal device 103 sends a synchronization signal 1 to the terminal devices 102 and 104.
- the terminal devices 102 and 104 need to simultaneously synchronize the synchronization signal 1 and / or Signal 2 is blindly detected. If synchronization sequence 1 for synchronization signal 1 and synchronization sequence 2 for synchronization signal 2 are the same or have a high correlation, terminal devices 102 and 104 may be unable to distinguish between synchronization signal 1 and synchronization signal 2. That is, the synchronization signals 1 and 2 will interfere with each other, and affect the establishment of a connection between the terminal devices 102, 103, and 104 and the network device 101, and the establishment of a direct connection between the terminal devices 102 and 104 and the terminal device 103.
- the synchronization signals of different source synchronization devices supporting different services may also cause interference, while the synchronization signals of source synchronization devices supporting other services (outside the Uu link) may also be separately associated with Interference is caused by synchronization signals on the cellular link.
- the terminal device 102 sends a synchronization signal 3.
- the synchronization signal 1 and the synchronization signal 3 may be different transmission modes for links between different devices. For example, synchronization signal 1 is used for transmission mode 1, transmission mode 1 is used for eMBB services, synchronization signal 3 is used for transmission mode 3, and transmission mode 3 is used for security services related to intelligent traffic of V2X. The timing reference between them may be different.
- the synchronization signal 1 and the synchronization signal 2 also need to avoid potential mutual interference.
- the mutual interference between the three signals between the synchronization signal 1 and the synchronization signal 2 and the synchronization signal 3 also needs to be avoided as much as possible. Therefore, the embodiments of the present application provide a solution capable of improving synchronization performance between devices. It should be understood that the scenario shown in FIG. 1 is only an example, and is not intended to limit the solution of the present application.
- the network equipment involved in this application is a device that is deployed in a wireless access network to provide wireless communication functions for terminal equipment.
- the network device may be a base station (Base, Station, BS), for example, a macro base station, a micro base station, a relay station, or an access point, and so on. It may also be another form of device, such as a street lamp, a roadside unit (RSU).
- BS Base, Station
- RSU roadside unit
- the names of devices with network device functions may be different. For example, they are network devices or base stations in the fifth generation 5G network.
- eNB Long Term Evolution, In an LTE
- eNodeB Long Term Evolution, In an LTE
- 3G Third Generation
- Node B Node B
- V2X V2X communication
- RSU roadside unit
- SOC system-on-chip
- the terminal devices involved in this application may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, or units, components, devices, and chips in the above devices Or SOC.
- the terminal device may be referred to as a wireless communication device, and may also be referred to as a mobile station (MS), a terminal, a user equipment (UE), and the like.
- MS mobile station
- UE user equipment
- the terminal device may include a subscriber unit, a cellular phone, a smart phone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer, and a modem ( modem) or modem processor, handheld device, laptop computer, netbook, cordless phone or wireless local loop (WLL) station, Bluetooth device , Machine type communication (machine type communication (MTC) terminals, etc.).
- PDA personal digital assistant
- WLL wireless local loop
- Bluetooth device Bluetooth device
- MTC Machine type communication
- Terminal equipment can support one or more wireless technologies for wireless communication, such as 5G, LTE, WCDMA, CDMA, 1X, Time Division-Synchronous Code Division Multiple Access (TS-SCDMA), GSM, 802.11 and more.
- the terminal device can also support different transmission services or different transmission modes on the cellular link or sidelink between the terminal devices, such as vehicle to vehicle (V2X) services, device to device (device to device, D2D) services can also support different technical features on cellular links, such as the Internet of Things (IoT), machine type communication (MTC), and so on.
- V2X vehicle to vehicle
- D2D device to device
- IoT Internet of Things
- MTC machine type communication
- Multiple terminal devices can perform the same or different services. For example, mobile broadband services, enhanced mobile broadband (eMBB) services, ultra-reliable and low-latency communication (URLLC) services, and so on.
- eMBB enhanced mobile broadband
- URLLC ultra-reliable and low-latency communication
- the network device 101 can execute the method provided by the embodiment of the present invention.
- the network device 101 may include: a controller or processor 201 (hereinafter, the processor 201 is used as an example for description) and a transceiver 202.
- the controller / processor 201 is sometimes referred to as a modem processor.
- the modem processor 201 may include a baseband processor (BBP) (not shown), which processes the digitized received signal to extract information or data bits conveyed in the signal.
- BBP baseband processor
- DSPs digital signal processors
- IC separate integrated circuit
- the transceiver 402 may be used to support the transmission and reception of information between the network device 101 and the terminal device, and support radio communication between the terminal devices.
- the processor 201 may also be configured to perform functions of various terminal devices communicating with other network devices.
- the uplink signal from the terminal device is received via the antenna, mediated by the transceiver 202, and further processed by the processor 201 to recover the service data and / or signaling information sent by the terminal device.
- service data and / or signaling messages are processed by the terminal device and modulated by the transceiver 202 to generate a downlink signal and transmitted to the terminal device via the antenna.
- the network device 101 may further include a memory 203, which may be used to store program code and / or data of the network device 101.
- the transceiver 202 may include independent receiver and transmitter circuits, or the same circuit may be used to implement the transceiver function.
- the network device 101 may further include a communication unit 204 for supporting the network device 201 to communicate with other network entities.
- the network device 101 is configured to support communication between the network device 101 and a network device of a core network.
- the network device may further include a bus.
- the transceiver 202, the memory 203, and the communication unit 204 may be connected to the processor 201 through a bus.
- the bus may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, or the like.
- PCI Peripheral Component Interconnect
- EISA Extended Industry Standard Architecture
- the bus may include an address bus, a data bus, a control bus, and the like.
- FIG. 3 is a schematic diagram of a possible structure of a terminal device in the wireless communication system.
- the terminal device can execute the method provided by the embodiment of the present invention.
- the terminal device may be any one of three terminal devices 102-104.
- the terminal device includes a transceiver 301, an application processor 302, a memory 303, and a modem processor 304.
- the transceiver 301 can adjust (for example, analog conversion, filtering, amplification, up-conversion, etc.) the output samples and generate an uplink signal, which is transmitted to the base station described in the above embodiment via an antenna.
- the antenna receives a downlink signal transmitted by a network device.
- the transceiver 301 can condition (e.g., filter, amplify, downconvert, and digitize, etc.) the signal received from the antenna and provide input samples.
- the modem processor 304 is sometimes referred to as a controller or processor and may include a baseband processor (BBP) (not shown) that processes the digitized received signal to extract the information conveyed in the signal Or data bits.
- BBP baseband processor
- BBP is typically implemented on demand or as desired in one or more numbers within modem processor 304 or as a separate integrated circuit (IC).
- the modem processor 304 may include an encoder 3041, a modulator 3042, a decoder 3043, and a demodulator 3044.
- the encoder 3041 is configured to encode a signal to be transmitted.
- the encoder 3041 may be used to receive service data and / or signaling messages to be sent on the uplink, and process (e.g., format, encode, or interleave, etc.) the service data and signaling messages.
- the modulator 3042 is configured to modulate an output signal of the encoder 3041.
- the modulator may perform symbol mapping and / or modulation on the output signals (data and / or signaling) of the encoder, and provide output samples.
- the demodulator 3044 is used for demodulating the input signal.
- the demodulator 3044 processes the input samples and provides symbol estimates.
- the decoder 5043 is configured to decode the demodulated input signal.
- the decoder 3043 deinterleaves and / or decodes the demodulated input signal, and outputs the decoded signal (data and / or signaling).
- the encoder 3041, the modulator 3042, the demodulator 3044, and the decoder 3043 may be implemented by a synthesized modem processor 304. These units process according to the radio access technology used by the radio access network.
- the modem processor 304 receives digitized data that can represent voice, data, or control information from the application processor 302, and processes the digitized data for transmission.
- the modem processor can support one or more of multiple wireless communication protocols of multiple communication systems, such as LTE, New Air Interface, Universal Mobile Telecommunications System (UMTS), High-Speed Packet Access Packet Access, HSPA) and so on.
- the modem processor 304 may also include one or more memories.
- the modem processor 304 and the application processor 302 may be integrated in a processor chip.
- the memory 303 is configured to store program code (sometimes also referred to as a program, an instruction, software, etc.) and / or data for supporting communication of the terminal device.
- program code sometimes also referred to as a program, an instruction, software, etc.
- the memory 203 or the memory 303 may include one or more storage units.
- the memory 203 or the memory 303 may be a storage unit inside the processor 201 or the modem processor 304 or the application processor 302 for storing program code, or may be It is an external storage unit independent from the processor 201 or the modem processor 304 or the application processor 302, or may also be a storage unit including the processor 201 or the modem processor 304 or the application processor 302 and the processor 201 or the modem
- the components of the processor 304 or the application processor 302 are independent external storage units.
- the processor 201 and the modem processor 301 may be the same type of processor, or may be different types of processors. For example, it can be implemented in a central processing unit (CPU), a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), and a field programmable gate array (ASIC). Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, other integrated circuits, or any combination thereof.
- the processor 201 and the modem processor 301 may implement or execute various exemplary logical blocks, modules, and circuits described in connection with the disclosure of the embodiments of the present invention.
- the processor may also be a combination of devices that implement computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, or a system-on-a-chip (SOC).
- the synchronization signals sent by the network equipment include a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).
- PSS primary synchronization signal
- SSS secondary synchronization signal
- the terminal equipment needs to receive PSS and SSS.
- the PSS (at least) is used for a receiver of a synchronization signal to perform initial symbol positioning (boundary), position determination of a synchronization signal block (Synchronization Signal Block, SSB), cyclic prefix, subframe positioning (boundary), and initial cell frequency synchronization.
- SS is used for radio frame boundary calibration.
- PSS and SSS are used together for physical layer cell ID detection.
- a network device To send a synchronization signal, a network device must first generate a corresponding sequence.
- a cellular link is generally called a Uu link in the standard, which refers to a wireless link between a terminal device and a network device, such as a wireless link between a mobile phone or a vehicle-mounted communication device and a base station.
- a cellular link is generally called a Uu link in the standard, which refers to a wireless link between a terminal device and a network device, such as a wireless link between a mobile phone or a vehicle-mounted communication device and a base station.
- the synchronization signals on the Uu link in the NR system described below are all downlink synchronization signals.
- the master synchronization sequence d PSS (n) for PSS is generated according to the following formula:
- formula (2) is a binary sequence Generator polynomial of, can generate binary sequence based on initial value (3) and generator polynomial (2)
- Binary sequence generated as above Is an m-sequence, which is an abbreviation of the longest linear feedback shift register sequence, and is a pseudo-random sequence, a pseudo noise (PN) code, or a pseudo-random code.
- the independent variable m can be regarded as the cyclic shift of the independent variable n in d PSS (n), and the corresponding cyclic shift value is one of them with Yes with cell ID Relevant identification.
- 1008 physical layer cell numbers are defined in the NR standard.
- the slave synchronization sequence d SSS (n) for SSS is generated according to the following formula:
- the design of the synchronization sequence d SSS (n) uses a Gold code sequence, which is a sequence generated based on the m sequence and consists of two m sequences. As described in formulas (4), (5), and (6), with Each is a binary m sequence. Similarly, x 0 (0) to x 0 (6) are sequences. X 1 (0) ⁇ x 1 (6) is the initial value of The initial value of then Equation (5) is a binary m-sequence with Generator polynomial of, m 0 is a sequence Cyclic shift value, m 1 is the sequence Cyclic shift value, where with Yes with cell ID Relevant identification. 1008 physical layer cell numbers are defined in the NR standard.
- slave synchronization sequences that can be generated by the above formula constitute a slave synchronization sequence set on the Uu link in the NR system.
- this slave synchronization sequence set is represented as ⁇ d SSS (n) ⁇ in this application.
- the synchronization sequence set in the system includes a total of 1008 sets of different master synchronization sequences and slave synchronization sequences.
- the other source synchronization device refers to a source synchronization device that supports other services in the NR system other than the cellular network, or a source synchronization device in other wireless communication systems other than the
- an embodiment of the present application provides a design scheme of a synchronization sequence.
- the synchronization sequence obtained by the method provided in the embodiment of the present application can be different from any synchronization sequence in a synchronization sequence set in a 5G NR system and It has lower correlation with any synchronization sequence in the synchronization sequence set in the 5G NR system, effectively reducing the interference between the synchronization signals of other source synchronization equipment and the synchronization signals on the Uu link in the NR system, thereby improving Synchronization performance between devices.
- a vehicle-to-everything (V2X) service in the NR system is used as an example.
- a terminal device supporting the V2X service in the NR system can directly communicate with other terminal devices without using a network device.
- the relay as the source synchronization device, sends a first synchronization signal and / or a second synchronization signal, where the first synchronization signal may be a master synchronization signal and the second synchronization signal may be a slave synchronization signal.
- the first synchronization sequence is different from any of the sequences of ⁇ d PSS (n) ⁇ , and / or the second synchronization sequence is different from any of the sequences of ⁇ d SSS (n) ⁇ .
- the first synchronization sequence is a cyclic shift of any sequence in ⁇ d PSS (n) ⁇ ; and / or, the generator polynomial corresponding to the first synchronization sequence is in ⁇ d PSS (n) ⁇
- the generator polynomial corresponding to any sequence is different.
- the binary sequence x is an m sequence. According to the characteristics of the m sequence, it can be known that the cross-correlation value of an m sequence and its own cyclic shift is the theoretically optimal value of -1. This can be illustrated by the following formula:
- the first synchronization sequence d 1 (n) is a cyclic shift of any sequence in ⁇ d PSS (n) ⁇ , indicating that the correlation value between the first synchronization sequence and any sequence in ⁇ d PSS (n) ⁇ is theoretical The lowest value can reduce the interference between the first synchronization signal corresponding to the first synchronization sequence and the main synchronization signal on the Uu link in the NR system. Therefore, the first synchronization sequence is a cyclic shift of any of the sequences ⁇ d PSS (n) ⁇ , which can ensure that the synchronization between the first synchronization signal corresponding to the first synchronization sequence and the main synchronization signal on the Uu link in the NR system.
- the first synchronization sequence is a cyclic shift of any of the sequences ⁇ d PSS (n) ⁇ .
- One possible implementation manner is that when the first synchronization sequence is generated, the sequence is the same as the main synchronization signal sequence on the Uu link in the NR system.
- the generator polynomials used to generate the m-sequence are the same, but they use different cyclic shift values.
- Generating m-sequences refers to generating polynomials.
- the generated sequences are different and can reach the theoretically best correlation performance of the m-sequence of formula (10).
- the length of the main synchronization signal sequence on the Uu link in the NR system is 127. At present, only three values of 0, 43, 86 are used for the cyclic shift value. For m-sequences with a length of 127, a total of 127 different cyclic shift values can be used. Therefore, a sufficient number of cyclic shift values can be generated as the first synchronization sequence in the embodiment of the present application.
- ⁇ d PSS (n) ⁇ when used ⁇ d PSS (n) ⁇ to any sequence corresponding to a different generating polynomial to generate the m-sequence generator polynomial, can be reduced with a first synchronization sequence ⁇ d PSS (n) ⁇ to any Cross-correlation between a sequence.
- this design method is simple, relatively small design changes compared to the NR system Uu link, strong version inheritance. For an m-sequence of a certain length, at least one other m-sequence paired with it can always be found, and its cross-correlation value can reach the theoretical bounds of the sequence (see equation (11) later).
- the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to the main synchronization signal sequence on the Uu link in the NR system, the first synchronization sequence and the main synchronization are different regardless of their respective cyclic shift values
- the sequences are always different and have the best cross-correlation performance achievable by the above theory. Therefore, when different generator polynomials are used, the cyclic shift value corresponding to the first synchronization sequence is not specifically limited. Alternatively, when different generator polynomials are used, the same cyclic shift value as the main synchronization signal sequence on the Uu link in the NR system may be used.
- the cyclic shift of the first synchronization sequence to any of the sequences ⁇ d PSS (n) ⁇ can be implemented in the following manner.
- the master synchronization sequence d PSS (n) is the m sequence To A cyclic shift of a cyclic shift value. In that case.
- the first synchronization sequence d 1 (n) is based on the same m sequence as d PSS (n) Increase the cyclic shift value by an offset value ⁇ , that is, the first synchronization sequence d 1 (n) is an m sequence To Is the cyclic shift of the cyclic shift value, where Optional, Respectively with the d PSS (n) expression with The value ranges are the same. Optional, And Therefore, in this case, it can be ensured that the first synchronization sequence d 1 (n) is a cyclic shift of any of the sequences ⁇ d PSS (n) ⁇ . Further, a new cyclic shift value The 3 cyclic shift values corresponding to d PSS (n) are placed at equal intervals.
- the first synchronization sequence d 1 (n) is the primary synchronization sequence d on the Uu link in the NR system.
- PSS (n) has better frequency deviation detection performance. The reason is that, for m-sequences, if the cyclic shift value of the target sequence detected by the device is not equal to the cyclic shift value interval of another potential target or the interference sequence, the performance of anti-frequency deviation is determined by one of the smallest intervals determine. Only when the cyclic shift value of the target sequence is equal to or as far as possible from the cyclic shift value of another potential target or the interference sequence, the ability to resist frequency offset can reach the maximum value.
- the first synchronization sequence d 1 (n) in this case is based on the same m sequence as d PSS (n) m sequence It may be generated by the same generator polynomial and initial value, or may be generated by different generator polynomials and initial values, which is not limited here.
- the cyclic shift value corresponding to the first synchronization sequence d 1 (n) and the cyclic shift value corresponding to d PSS (n) are equally spaced.
- the solid arrows indicate the cyclic shift values corresponding to d PSS (n), which are 0, 43, 86, and the interval between them is 43.
- the dotted arrow indicates the cyclic shift value corresponding to the first synchronization sequence d 1 (n).
- the cyclic shift values corresponding to d 1 (n) are 22,65,108.
- the first synchronization sequence d 1 (n) of the system Uu link NR The frequency deviation detection performance of the master synchronization sequence d PSS (n) is the best.
- the offset value ⁇ is signaled or the offset value ⁇ is predefined.
- the signaling including the offset value ⁇ may be directly notified by the base station through signaling of RRC, SIB, or DCI, or may be indirectly indicated by other parameters.
- the signaling including the offset value ⁇ may also be directly notified by the terminal device through control signaling on a sidelink between devices, or may be indirectly indicated by other parameters.
- the indirect indication method for example, it may be indicated by an identifier of a synchronization sequence or an identifier of a group number to which the synchronization sequence belongs.
- the first synchronization sequence can be generated according to the following formula:
- x (0) ⁇ x (6) are initial values
- formula (8) is the generator polynomial of binary sequence x.
- the initial value and generator polynomial are both the main synchronization sequence on the Uu link in the NR system, that is, d PSS (n) ,
- the corresponding initial value and generator polynomial are the same.
- m ′ in formula (7) adds an offset value ⁇ , 0 ⁇ ⁇ 43, and ⁇ is a positive integer, so that in this possible design, the first synchronization
- the sequence d 1 (n) is a cyclic shift of any of the sequences ⁇ d PSS (n) ⁇ .
- Respectively with the d PSS (n) expression with The value ranges are the same.
- a possible implementation manner is that the generator polynomial corresponding to the first synchronization sequence is different from the generator polynomial corresponding to any sequence in ⁇ d PSS (n) ⁇ , and the m sequence corresponding to d PSS (n) is used with the same length but a generator polynomial Different m sequences are used to generate the first synchronization sequence, which can reduce the cross-correlation between the first synchronization sequence and any sequence of ⁇ d PSS (n) ⁇ . And this design method is simple, relatively small design changes compared to the NR system Uu link, strong version inheritance.
- the generator polynomial of the first synchronization sequence can be [K 6 , K 5 , K 4 , K 3 , K 2 , K 1 , K 0 ] ⁇ [0,0,1,0,0,0,1], and K n is an integer, where x (0) ⁇ X (6) is the initial value.
- the initial value of a sequence cannot be all zeros. When it is all zeros, the corresponding sequence cannot be generated by generating a polynomial. The reason is that the initial value of the sequence corresponds to the initial state of the cyclic shift register in the m-sequence implementation. If it is all zeros, the result output through the rotary shift register will always be zero.
- the value of the non-zero initial value the present invention is not particularly limited.
- m-sequences with the same shift register length there are only m-sequences generated by uncorrelated generator polynomial pairs, which have the best cross-correlation performance between them.
- the so-called cross-correlation is the correlation value between two cyclically shifted unequal sequences.
- the best cross-correlation performance means that the cross-correlation value of these 2 sequences at any cyclic shift value has the following theoretical minimum value:
- the first synchronization sequence may be different from any of the sequences in ⁇ d PSS (n) ⁇ , which facilitates the cyclic shift corresponding to the first synchronization sequence Determination of bit values.
- the correlation performance of this sequence is similar after changing from frequency domain to time domain or from time domain to frequency domain. Therefore, there are few restrictions on the receiver's implementation algorithm, which is more friendly to implementation.
- a mode may be determined according to characteristics defined by different protocol versions, or a mode determined according to a service type, or a mode determined according to a resource selection and allocation method.
- the first mode is used to support eMBB services; the second mode is used to support V2X services.
- it can also be divided according to the technical characteristics of the protocol standardization process.
- Mode 1 and / or Mode 2; Mode B and Mode 3 and / or Mode 4 are defined.
- It may also be a mode defined according to a resource scheduling mode, such as a mode in which mode 1 is used for configuration or indication based on a base station, such as a mode in which mode 2 is used for a terminal-selected resource.
- different methods may be used to generate synchronization sequences, that is, the terminal device or network device may also generate a fifth synchronization.
- Sequence, the fifth synchronization sequence and the first synchronization sequence correspond to the first mode and the second mode, respectively. All possible first synchronization sequences constitute a first synchronization sequence set, and the fifth synchronization sequence is different from any one of the first synchronization sequence sets, and the difference includes that the fifth synchronization sequence is any one of the first synchronization sequence sets.
- the generator polynomial corresponding to the fifth synchronization sequence is different from the generator polynomial corresponding to any sequence in the first synchronization sequence set.
- the mutual interference between sidelink synchronization signal transmission of different modes can also be reduced or controlled.
- the fifth synchronization sequence may be generated in any of the following ways.
- Method 1 The first mode corresponds to the same generator polynomial as the second mode, and any sequence in the first synchronization sequence set corresponds to the first cyclic shift value, the fifth synchronization sequence corresponds to the second cyclic shift value, and the first cycle The shift value is different from the second cyclic shift value.
- the first mode and the second mode correspond to different generator polynomials, that is, the generator polynomial corresponding to the fifth synchronization sequence is different from the generator polynomial corresponding to any sequence in the first synchronization sequence set.
- Method 3 Any sequence in the first synchronization sequence set corresponds to the first generation polynomial and the first cyclic shift value, the fifth synchronization sequence corresponds to the second generation polynomial and the second cyclic shift value, and the first generation polynomial and the second The generation polynomials are different, and the first cyclic shift value and the second cyclic shift value are different.
- the second synchronization sequence d 2 (n) may satisfy:
- the sequence is defined in this application And sequence
- the second synchronization sequence is different from any of the sequences in ⁇ d SSS (n) ⁇ , including the sequence For sequence Cyclic shift, and / or, sequence For sequence And / or, the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any of the sequences in ⁇ d SSS (n) ⁇ .
- the second synchronization sequence is also generated based on the gold code sequence. According to the characteristics of the gold code sequence described above, it can be known that the sequence constituting the second synchronization sequence And sequence Each is generated based on an m-sequence.
- the second synchronization sequence and any sequence of ⁇ d SSS (n) ⁇ can have the theoretically lowest correlation.
- the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any of the sequences in ⁇ d SSS (n) ⁇ , it can be based on a different gold sequence from the slave synchronization signal on the Uu link in the NR system. This allows the second synchronization sequence to have a lower correlation with any of the sequences of ⁇ d SSS (n) ⁇ .
- the analysis of correlation is similar to the above, and will not be repeated here.
- the sequence For sequence Cyclic shift, and / or, sequence For sequence The cyclic shift can be implemented in the following way, the second synchronization sequence satisfies Among them, ⁇ is a non-zero integer.
- ⁇ is a non-zero integer.
- d SSS (n) expression with The value ranges are the same.
- d SSS (n) For the m sequence Cyclic shift with m 0 as the cyclic shift value. In that case.
- the sequence in this case Based on Same m sequence m sequence It may be generated by the same generator polynomial and initial value, or may be generated by different generator polynomials and initial values, which is not limited here.
- ⁇ 45 which indicates that the offset value of the increased cyclic shift value is further selected after 45, or that ⁇ is greater than zero and not an integer multiple of 5, which indicates that there is no clear limit on the size of the increased offset value.
- ⁇ is greater than or equal to 45 and an integer multiple of 5, which means that the increased offset value is further selected after 45 and is selected at an equal interval of 5.
- the offset value ⁇ is indicated by signaling, or the offset value ⁇ is predefined. Sequence at this time The corresponding cyclic shift value and The corresponding cyclic shift values are equally spaced, and The corresponding cyclic shift value is The intervals between the corresponding cyclic shift values are all equal, which can improve the frequency deviation detection performance of the second synchronization sequence d 2 (n) on the main synchronization sequence d SSS (n) on the Uu link in the NR system.
- the second synchronization sequence satisfying m 0 ′ may also satisfy In this case, the value of the offset value ⁇ will cause a corresponding change. It should be understood that any simple deformation of m 0 ′ is included in the scope disclosed in the embodiments of the present application. The specific value changes No detailed enumeration.
- the offset value ⁇ is signaled or the offset value ⁇ is predefined.
- the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to any sequence of ⁇ d SSS (n) ⁇ .
- this design method is simple, relatively small design changes compared to the NR system Uu link, strong version inheritance. For a certain length of Gold sequence, it is generated from 2 equal-length m sequences.
- the generated Gold sequence will be different. Therefore, if the generator polynomial corresponding to the second synchronization sequence is different from the generator polynomial corresponding to the synchronization signal sequence on the Uu link in the NR system, the respective sequences generated based on the respective generator polynomials, regardless of their respective cyclic shifts What is the value, it is always different and low cross-correlation value. Therefore, when different generator polynomials are used, there is no special limitation on the cyclic shift value corresponding to the second synchronization sequence. Alternatively, when different generator polynomials are used, the same cyclic shift value as the slave synchronization signal sequence on the Uu link in the NR system may be used.
- a mode may be determined according to characteristics defined by different protocol versions, or a mode determined according to a service type, or a mode determined according to a resource selection and allocation method.
- the first mode is used to support eMBB services; the second mode is used to support V2X services.
- it can also be divided according to the technical characteristics of the protocol standardization process.
- Mode 1 and / or Mode 2; Mode B and Mode 3 and / or Mode 4 are defined.
- It may also be a mode defined according to a resource scheduling mode, such as a mode in which mode 1 is used for configuration or indication based on a base station, such as a mode in which mode 2 is used for a terminal-selected resource.
- the same terminal device or the same network device supports multiple different modes
- different methods may be used to generate synchronization sequences, that is, the terminal device or network device may also generate a sixth sequence.
- the synchronization sequence, the sixth synchronization sequence and the second synchronization sequence correspond to the first mode and the second mode, respectively.
- All possible second synchronization sequences form a second synchronization sequence set, and the sixth synchronization sequence is different from any sequence in the second synchronization sequence set, and the difference includes that one or more m sequences corresponding to the sixth synchronization sequence are the Cyclic shift of one or more m sequences corresponding to any sequence in the second synchronization sequence set, and / or, a generator polynomial corresponding to the sixth synchronization sequence and any sequence in the second synchronization sequence set The corresponding generator polynomials are different.
- the sixth synchronization sequence may be generated in any of the following ways.
- Method 1 The first pattern corresponds to the same generator polynomial as the second pattern, and one or more m sequences in any one of the second synchronization sequence sets correspond to the first cyclic shift value and one of the sixth synchronization sequence.
- the one or more m sequences correspond to a second cyclic shift value, and the first cyclic shift value is different from the second cyclic shift value.
- the first mode and the second mode correspond to different generator polynomials, that is, the generator polynomial corresponding to one or more m sequences in the sixth synchronization sequence and one or more m in any sequence in the second synchronization sequence set. Sequences have different generator polynomials.
- Manner 3 One or more m sequences of any sequence in the second synchronization sequence set correspond to the first generation polynomial and the first cyclic shift value, and one or more m sequences of the sixth synchronization sequence correspond to the second generation polynomial and In the second cyclic shift value, the first and second polynomials are different, and the first and second cyclic shift values are different.
- the synchronization signal identification set includes one or more subsets, and the synchronization signal identification in the subset indicates at least one of the following information:
- the timing reference of the first device is a network device
- the timing reference of the first device is a third device using the network device as a timing parameter
- the timing reference of the first device is a satellite
- the timing reference of the first device is a third device using the satellite as a timing parameter
- the timing reference of the first device is the first device itself or the third device that is not synchronized to the network device or satellite.
- the synchronization signal identification set includes two subsets, and different subsets correspond to different cyclic shift values of the first synchronization sequence and / or the second synchronization sequence;
- the synchronization signal identifiers in the two subsets are used to indicate any of the following information: the timing reference of the first device is a network device, and the synchronization signal identifier is determined from the first sequence subset; the timing reference of the first device Not a network device, determining a synchronization signal identifier from the second sequence subset;
- the synchronization signal identifiers in the two subsets are used to indicate any of the following information: the timing reference of the first device is a network device, and the synchronization signal identifier is determined from the first sequence subset, and the timing reference of the first device Determining a synchronization signal identifier from a second sequence subset for a third device using a network device as a timing parameter;
- the synchronization signal identifiers in the two subsets are used to indicate any of the following information:
- the timing reference of the first device is a satellite, and the synchronization signal identifier is determined from the first sequence subset.
- the timing reference of the first device is not A satellite, determining a synchronization signal identifier from the second sequence subset;
- the synchronization signal identifiers in the two subsets are used to indicate any of the following information: the timing reference of the first device is a satellite, and the synchronization signal identifier is determined from the first sequence subset, and the timing reference of the first device is The satellite is a third device with timing parameters, and determines the synchronization signal identifier from the second sequence subset;
- the synchronization signal identification set includes four subsets, and different sequence subsets correspond to different cyclic shift values of the first synchronization sequence and / or the second synchronization sequence, and the four sequence subsets are respectively used to indicate the following Any of the information:
- the timing reference of the first device is a network device, and the synchronization signal identifier is determined from the first sequence subset;
- the timing reference of the first device is a third device that uses the network device as a timing parameter, and determines the synchronization signal identifier from the second sequence subset;
- the timing reference of the first device is a satellite, and the synchronization signal identifier is determined from the third sequence subset;
- the timing of the first device refers to the third device using the satellite as a timing parameter, and determines the synchronization signal identifier from the fourth sequence subset.
- the synchronization signal identification set includes five subsets, and different sequence subsets correspond to different cyclic shift values of the first synchronization sequence and / or the second synchronization sequence.
- the five sequence subsets respectively indicate the following Any of the information:
- the timing reference of the first device is a network device, and the synchronization signal identifier is determined from the first sequence subset;
- the timing reference of the first device is a third device that uses the network device as a timing parameter, and determines the synchronization signal identifier from the second sequence subset;
- the timing reference of the first device is a satellite, and the synchronization signal identifier is determined from the third sequence subset;
- the timing of the first device refers to the third device using the satellite as a timing parameter, and determines the synchronization signal identifier from the fourth sequence subset;
- the timing reference of the first device uses the first device itself or the third device that is not synchronized to the network device or satellite to determine the synchronization signal identifier from the fifth sequence subset.
- the obtained synchronization sequence can be different from any synchronization sequence in the synchronization sequence set in the 5G NR system, which effectively reduces the synchronization signals of other source synchronization devices and the Uu link in the NR system
- the interference between signals improves the synchronization performance between devices, and at the same time minimizes the difference from the synchronization signal design in the 5G NR system.
- Only small changes in the existing system are needed to ensure the synchronization performance of different services. , Reducing the restrictions on deploying different systems or different services in the same area.
- FIG. 5 is a schematic signaling diagram of a method provided by an embodiment of the present application. It should be noted that some steps in FIG. 5 and the following may be optional, and the embodiments of the present invention are not limited to all steps. In addition, the sequence numbers of the steps are only for convenience of description, and do not represent the sequence. In addition, unless otherwise specified, the third synchronization sequence in the present application is the above. The fourth synchronization sequence is the above
- Step 501 The first device generates a first synchronization sequence and / or a second synchronization sequence, wherein the first synchronization sequence is different from any sequence in a third synchronization sequence set, and / or the second synchronization sequence Different from any sequence in the fourth synchronization sequence set.
- the first device in the embodiment of the present application may be a terminal device, a network device, or an apparatus that executes the method in the embodiment of the application in the terminal device or the network device.
- the first device may generate only the first synchronization sequence or only the second synchronization sequence.
- a first synchronization sequence and a second synchronization sequence are generated.
- the first device uses only one synchronization signal to complete synchronization with the second device.
- the first synchronization sequence may be a master synchronization sequence
- the second synchronization sequence may be a slave synchronization sequence.
- the operation in this step may be implemented by the modem processor 504 in the terminal device.
- the operation in this step may be implemented by the processor 401 in the network device.
- Step 502 The first device sends a first synchronization signal corresponding to the first synchronization sequence, and / or a second synchronization signal corresponding to the second synchronization sequence.
- the second device receives a first synchronization signal corresponding to the first synchronization sequence, and / or a second synchronization signal corresponding to the second synchronization sequence.
- the first device After the first device generates the first synchronization sequence and / or the second synchronization sequence, the first device maps the sequence to a corresponding time domain symbol or a frequency domain subcarrier of the corresponding time domain symbol, generates a synchronization signal, and sends the first synchronization signal and / Or a second synchronization signal.
- the second device receives the first synchronization signal corresponding to the first synchronization sequence and / or the second synchronization signal corresponding to the second synchronization sequence.
- the operation in this step may be implemented by the transceiver 501 in the terminal device, and of course, it may also be implemented by the modem processor 504 in the terminal device to control the transceiver 501.
- the operation in this step may be implemented by the transceiver 402 in the foregoing network device, and of course, it may also be implemented by the processor 401 in the foregoing network device to control the transceiver 402.
- Step 503 The second device acquires a synchronization signal identifier N ID according to the first synchronization information and / or the second synchronization information.
- the second device determines the timing reference source of the first device according to the synchronization signal identifier N ID .
- the synchronization signal identifier can indicate the timing reference source of the first device.
- the synchronization signal identification N ID may determine a timing reference source of the first device.
- the timing reference source is any of the following: a network device, a non-network device, a third device using the network device as a timing parameter, a satellite, a non-satellite, the first device itself, and a first device using the satellite as a timing parameter. Three devices, a third device that is not synchronized to a network device or satellite.
- the second device acquires timing information according to the first synchronization signal and / or the second synchronization signal. Specifically, the second device receives and detects the first synchronization signal and / or the second synchronization sequence according to the first synchronization sequence and / or the second synchronization sequence stored locally or according to the signal characteristics of the first synchronization sequence and / or the second synchronization sequence. Sync signal. Thereby, the corresponding symbols, synchronization signals, time slots, sub-frames or radio frame boundaries are obtained. Combined with the indication signal of the frame number to further determine the exact position of each sub-frame radio frame, sub-frame, time slot, synchronization signal or symbol, thereby obtaining timing information.
- the second device obtains the synchronization signal identifier N ID according to the first synchronization signal and / or the second synchronization signal, and includes the second device obtaining the first identification according to the first synchronization signal and / or the second synchronization signal. And / or second logo
- the second device according to the first identifier And / or the second identification Determine the synchronization signal identification N ID .
- the second device is based on the first identifier And / or second logo Determine the synchronization signal identification N ID , including
- the second device in the embodiment of the present application may be a terminal device, a network device, or a device that executes the method in the embodiment of the application in the terminal device or the network device.
- the operation in this step may be implemented by the modem processor 504 in the terminal device.
- the operation in this step may be implemented by the processor 401 in the network device.
- the first synchronization sequence and / or the second synchronization sequence sent by the above method can be different from any synchronization sequence in the synchronization sequence set in the 5G NR system, effectively reducing the synchronization signals of other source synchronization devices and the Uu chain in the NR system.
- the interference between the synchronization signals on the road improves the synchronization performance between the devices, and at the same time minimizes the difference from the synchronization signal design in the 5G NR system. Only a small change in the existing system can ensure the difference.
- Business synchronization performance simplifies possible system erection projects.
- An example of the present invention further provides an apparatus (for example, an integrated circuit, a wireless device, a circuit module, etc.) for implementing the above method.
- the means to implement the power tracker and / or power supply generator described herein may be a stand-alone device or may be part of a larger device.
- the device may be (i) a stand-alone IC; (ii) a set with one or more 1Cs, which may include a memory IC for storing data and / or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter / Receiver; (iv) ASIC, such as a mobile station modem; (v) modules that can be embedded in other devices; (vi) receiver, cell phone, wireless device, handset, or mobile unit; (vii) others Wait.
- a stand-alone IC may include a memory IC for storing data and / or instructions; (iii) an RFIC, such as an RF receiver or RF transmitter / Receiver; (iv) ASIC, such as a mobile station modem; (v) modules that can be embedded in other devices; (vi) receiver, cell phone, wireless device, handset, or mobile unit; (vii) others Wait.
- the method and apparatus provided in the embodiments of the present invention may be applied to a terminal device or a network device (which may be collectively referred to as a wireless device).
- the terminal device or network device or wireless device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
- This hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory).
- the operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system.
- This application layer contains applications such as browsers, address books, word processing software, and instant messaging software.
- the embodiment of the present invention does not limit the specific structure of the method execution subject, as long as the program that records the code of the method of the embodiment of the present invention can be used to transmit a signal according to the embodiment of the present invention.
- the communication method is sufficient.
- the wireless communication method according to the embodiment of the present invention may be executed by a terminal device or a network device, or a function module in the terminal device or the network device that can call a program and execute the program.
- various aspects or features of embodiments of the present invention may be implemented as a method, an apparatus, or an article of manufacture using standard programming and / or engineering techniques.
- article of manufacture encompasses a computer program accessible from any computer-readable device, carrier, or medium.
- computer-readable media may include, but are not limited to: magnetic storage devices (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CD), digital versatile discs (DVD) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
- various storage media described herein may represent one or more devices and / or other machine-readable media used to store information.
- machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instruction (s) and / or data.
- 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 from a website site, computer, server, or data center Transmission by wire (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) to another website site, 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, a data center, and the like that includes one or more available medium integration.
- the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (Solid State Disk (SSD)), and the like.
- a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
- an optical medium for example, a DVD
- a semiconductor medium for example, a solid state disk (Solid State Disk (SSD)
- the size of the sequence numbers of the above processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and it should not deal with the present invention.
- the implementation process of the examples constitutes any limitation.
- the disclosed systems, devices, and methods may be implemented in other ways.
- the device embodiments described above are only schematic.
- the division of the unit is only a logical function division.
- multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
- the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
- the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
- the technical solution of the embodiment of the present invention is essentially a part that contributes to the existing technology or a part of the technical solution may be embodied in the form of a software product, which is stored in a storage medium.
- the foregoing storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes .
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Abstract
Description
Claims (41)
- 一种同步信号的发送方法,应用于第一设备,其特征在于,所述方法包括:生成第一同步序列和/或第二同步序列,其中,所述第一同步序列与第三同步序列集合中的任一个序列不同,和/或,所述第二同步序列与第四同步序列集合中的任一个序列不同;所述第三同步序列集合中的任一个序列满足:d 3(n)=1-2x(m)0≤n<127且[x(6) x(5) x(4) x(3) x(2) x(1) x(0)]=[1 1 1 0 1 1 0];所述第四同步序列集合中的任一个序列满足:且[x 0(6) x 0(5) x 0(4) x 0(3) x 0(2) x 0(1) x 0(0)]=[0 0 0 0 0 0 1],[x 1(6) x 1(5) x 1(4) x 1(3) x 1(2) x 1(1) x 1(0)]=[0 0 0 0 0 0 1];发送所述第一同步序列对应的第一同步信号和/或所述第二同步序列对应的第二同步信号。
- 根据权利要求1所述的方法,其特征在于,所述第一同步序列与第三同步序列集合中的任一个序列不同,包括:所述第一同步序列为所述第三同步序列集合中任一个序列的循环移位;和/或,所述第一同步序列对应的生成多项式与所述第三同步序列集合中任一个序列对应的生成多项式不同。
- 根据权利要求3所述的方法,其特征在于,所述Δ的取值大于0且小于A。
- 根据权利要求6-7任一项所述的方法,其特征在于,所述所述第二同步序列对应的生成多项式与所述第四同步序列集合中任一个序列对应的生成多项式不同,包括:所述第二同步序列对应的生成多项式包括x 0(i+7)=(x 0(i+3)+x 0(i))mod 2,其中x 0(0)~x 0(6)为初始值。
- 根据权利要求9所述的方法,其特征在于,所述同步信号标识集合包括一个或多个子集,所述子集中的同步信号标识分别指示以下信息中的至少一种:所述第一设备的定时参考为网络设备;所述第一设备的定时参考为以网络设备为定时参数的第二设备;所述第一设备的定时参考为卫星;所述第一设备的定时参考为以卫星为定时参数的第二设备;所述第一设备的定时参考为以所述第一设备自身或未同步到网络设备或卫星的所述第二设备。
- 一种同步信号的接收方法,应用于第二设备,其特征在于,所述方法包括:接收第一同步序列对应的第一同步信号和/或第二同步序列对应的第二同步信号;其中,所述第一同步序列与第三同步序列集合中的任一个序列不同,和/或,所述第二同步序列与第四同步序列集合中的任一个序列不同;所述第三同步序列集合中的任一个序列满足:d 3(n)=1-2x(m)0≤n<127且[x(6) x(5) x(4) x(3) x(2) x(1) x(0)]=[1 1 1 0 1 1 0];所述第四同步 序列集合中的任一个序列满足:且[x 0(6) x 0(5) x 0(4) x 0(3) x 0(2) x 0(1) x 0(0)]=[0 0 0 0 0 0 1],[x 1(6) x 1(5) x 1(4) x 1(3) x 1(2) x 1(1) x 1(0)]=[0 0 0 0 0 0 1];根据所述第一同步序列和/或所述第二同步序列获取同步信号标识N ID。
- 根据权利要求11所述的方法,其特征在于,所述第一同步序列与第三同步序列集合中的任一个序列不同,包括:所述第一同步序列为所述第三同步序列集合中任一个序列的循环移位;和/或,所述第一同步序列对应的生成多项式与所述第三同步序列集合中任一个序列对应的生成多项式不同。
- 根据权利要求13所述的方法,其特征在于,所述Δ的取值大于0且小于43。
- 根据权利要求16-17任一项所述的方法,其特征在于,所述所述第二同步序列对应的生成多项式与所述第四同步序列集合中任一个序列对应的生成多项式不同, 包括:所述第二同步序列对应的生成多项式包括x 0(i+7)=(x 0(i+3)+x 0(i))mod 2,其中x 0(0)~x 0(6)为初始值。
- 根据权利要求11-18任一项所述的方法,其特征在于,所述方法还包括:根据所述同步信号标识N ID确定所述第一设备的定时参考源。
- 一种同步信号的发送装置,其特征在于,包括:处理器和与所述处理器耦合的存储器和收发器;其中,所述处理器用于,生成第一同步序列和/或第二同步序列,其中,所述第一同步序列与第三同步序列集合中的任一个序列不同,和/或,所述第二同步序列与第四同步序列集合中的任一个序列不同;所述第三同步序列集合中的任一个序列满足:d 3(n)=1-2x(m)0≤n<127且[x(6) x(5) x(4) x(3) x(2) x(1) x(0)]=[1 1 1 0 1 1 0];所述第四同步序列集合中的任一个序列满足:且[x 0(6) x 0(5) x 0(4) x 0(3) x 0(2) x 0(1) x 0(0)]=[0 0 0 0 0 0 1],[x 1(6) x 1(5) x 1(4) x 1(3) x 1(2) x 1(1) x 1(0)]=[0 0 0 0 0 0 1];所述收发器用于,发送所述第一同步序列对应的第一同步信号和/或所述第二同步序列对应的第二同步信号。
- 根据权利要求21所述的装置,其特征在于,所述第一同步序列与第三同步序列集合中的任一个序列不同,包括:所述第一同步序列为所述第三同步序列集合中任一个序列的循环移位;和/或,所述第一同步序列对应的生成多项式与所述第三同步序列集合中任一个序列对应的生成 多项式不同。
- 根据权利要求23所述的装置,其特征在于,所述Δ的取值大于0且小于A。
- 根据权利要求21-27任一项所述的装置,其特征在于,所述所述第二同步序列对应的生成多项式与所述第四同步序列集合中任一个序列对应的生成多项式不同,包括:所述第二同步序列对应的生成多项式包括x 0(i+7)=(x 0(i+3)+x 0(i))mod 2,其中x 0(0)~x 0(6)为初始值。
- 根据权利要求29所述的装置,其特征在于,所述同步信号标识集合包括一个或多个子集,所述子集中的同步信号标识分别指示以下信息中的至少一种:所述第一设备的定时参考为网络设备;所述第一设备的定时参考为以网络设备为定时参数的第二设备;所述第一设备的定时参考为卫星;所述第一设备的定时参考为以卫星为定时参数的第二设备;所述第一设备的定时参考为以所述第一设备自身或未同步到网络设备或卫星的所述第二设备。
- 一种同步信号的接收装置,其特征在于,包括:处理器和与所述处理器耦合的存储器和收发器;其中,所述收发器用于,接收第一同步序列对应的第一同步信号和/或第二同步序列对应的第二同步信号;其中,所述第一同步序列与第三同步序列集合中的任一个序列不同,和/或,所述第二同步序列与第四同步序列集合中的任一个序列不同;所述第三同步序列集合中的任一个序列满足:d 3(n)=1-2x(m)0≤n<127且[x(6) x(5) x(4) x(3) x(2) x(1) x(0)]=[1 1 1 0 1 1 0];所述第四同步序列集合中的任一个序列满足:且[x 0(6) x 0(5) x 0(4) x 0(3) x 0(2) x 0(1) x 0(0)]=[0 0 0 0 0 0 1],[x 1(6) x 1(5) x 1(4) x 1(3) x 1(2) x 1(1) x 1(0)]=[0 0 0 0 0 0 1];所述处理器用于,根据所述第一同步序列和/或所述第二同步序列获取同步信号标识N ID。
- 根据权利要求31所述的装置,其特征在于,所述第一同步序列与第三同步序列集合中的任一个序列不同,包括:所述第一同步序列为所述第三同步序列集合中任一个序列的循环移位;和/或,所述第一同步序列对应的生成多项式与所述第三同步序列集合中任一个序列对应的生成多项式不同。
- 根据权利要求33所述的装置,其特征在于,所述Δ的取值大于0且小于43。
- 根据权利要求31-37任一项所述的装置,其特征在于,所述所述第二同步序列对应的生成多项式与所述第四同步序列集合中任一个序列对应的生成多项式不同,包括:所述第二同步序列对应的生成多项式包括x 0(i+7)=(x 0(i+3)+x 0(i))mod 2,其中x 0(0)~x 0(6)为初始值。
- 根据权利要求31-38任一项所述的装置,其特征在于,所述处理器还用于,根据所述同步信号标识N ID确定所述第一设备的定时参考源。
- 一种包含指令的计算机存储介质,当其在计算机上运行时,使得计算机执行所述权利要求1-40中任一项所述的方法。
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CN112615704A (zh) | 2021-04-06 |
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JP2021533689A (ja) | 2021-12-02 |
EP4277374A2 (en) | 2023-11-15 |
BR112021002221A2 (pt) | 2021-05-04 |
MX2021001555A (es) | 2021-04-13 |
KR102468869B1 (ko) | 2022-11-17 |
EP3836650C0 (en) | 2023-07-19 |
CN110830211A (zh) | 2020-02-21 |
EP3836650A1 (en) | 2021-06-16 |
KR20210040141A (ko) | 2021-04-12 |
US20210204238A1 (en) | 2021-07-01 |
JP7264991B2 (ja) | 2023-04-25 |
EP3836650B1 (en) | 2023-07-19 |
US20230292268A1 (en) | 2023-09-14 |
CN112615704B (zh) | 2022-03-08 |
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