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WO2020019297A1 - Procédé, dispositif et système de transmission d'informations entre des dispositifs de l'internet des véhicules - Google Patents

Procédé, dispositif et système de transmission d'informations entre des dispositifs de l'internet des véhicules Download PDF

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Publication number
WO2020019297A1
WO2020019297A1 PCT/CN2018/097423 CN2018097423W WO2020019297A1 WO 2020019297 A1 WO2020019297 A1 WO 2020019297A1 CN 2018097423 W CN2018097423 W CN 2018097423W WO 2020019297 A1 WO2020019297 A1 WO 2020019297A1
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WIPO (PCT)
Prior art keywords
broadcast block
synchronization
connected vehicle
information
block
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PCT/CN2018/097423
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English (en)
Chinese (zh)
Inventor
刘洋
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Priority to CN201880000901.7A priority Critical patent/CN109565647B/zh
Priority to PCT/CN2018/097423 priority patent/WO2020019297A1/fr
Publication of WO2020019297A1 publication Critical patent/WO2020019297A1/fr
Anticipated expiration legal-status Critical
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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
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • 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]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes

Definitions

  • the present disclosure relates to the field of wireless communication technologies, and in particular, to a method, a device, and a system for transmitting information between connected vehicle devices.
  • Telematics is a new automotive technology development direction that combines navigation and positioning, wireless communication, and remote sensing technologies.
  • vehicle-to-vehicle connected devices perform synchronization and information transmission between devices through broadcast system information.
  • an IoV device can send a synchronization signal and system information of the IoV device through broadcasting. After receiving another IoV device and the system information, the IoV device synchronizes the signal through the synchronization signal and communicates with the IoV devices communicate.
  • the present disclosure provides a method for transmitting information between connected vehicle devices.
  • the technical solution is as follows:
  • a method for transmitting information between connected devices in a car includes:
  • the first connected vehicle device sends a wireless signal including a synchronization broadcast block, which is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block is located in 3 consecutive orthogonal frequency division multiplexes in the time domain OFDM symbol
  • the second connected vehicle device receives the wireless signal
  • the second connected vehicle device acquires information carried by the synchronous broadcast block according to a detection result.
  • a method for transmitting information between a connected vehicle device the method being executed by a second connected vehicle device, the method including:
  • the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block occupies 3 consecutive orthogonal frequency division multiplexes in the time domain OFDM symbol
  • the information carried by the synchronization broadcast block is acquired according to a detection result.
  • the synchronization signals include a primary synchronization signal and a secondary synchronization signal
  • the primary synchronization signal is located in a first OFDM symbol, and the secondary synchronization signal is located in a second OFDM symbol.
  • the physical broadcast channel is located at a third OFDM symbol
  • the physical broadcast channel is located in a third OFDM symbol, and at least one of the first OFDM symbol and the second OFDM symbol.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the primary synchronization signal or the secondary synchronization signal in the frequency domain.
  • the subcarrier interval of the wireless signal is a subcarrier interval determined according to a frequency band where the wireless signal is located; the subcarrier interval is 15kHz, 30kHz, or 60kHz.
  • some of the resource blocks occupied by the physical broadcast channel are used to carry demodulation reference signals.
  • part of the demodulation reference signal includes index information of the synchronous broadcast block
  • all signals in the demodulation reference signal include index information of the synchronization broadcast block
  • the demodulation reference signal does not include index information of the synchronization broadcast block.
  • the frequency band corresponding to the index information of the synchronous broadcast block is all or part of the at least one designated frequency band.
  • the period of the synchronous broadcast block is all or part of a period of at least one designated period.
  • a method for transmitting information between a connected vehicle device the method being executed by a first connected vehicle device, the method including:
  • Generating information carried by a synchronization broadcast block where the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block is located in three consecutive orthogonal frequency division multiplexed OFDM symbols in the time domain;
  • an apparatus for transmitting information between connected vehicle devices the device is used in a second connected vehicle device, and the device includes:
  • a signal receiving module configured to receive a wireless signal sent by the first connected vehicle device
  • a detection module configured to detect a synchronization broadcast block in the received wireless signal, the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block occupies 3 consecutive positive signals in the time domain; Cross-frequency division multiplexed OFDM symbol;
  • An information acquisition module is configured to acquire information carried by the synchronous broadcast block according to a detection result.
  • the synchronization signals include a primary synchronization signal and a secondary synchronization signal
  • the primary synchronization signal is located in a first OFDM symbol, and the secondary synchronization signal is located in a second OFDM symbol.
  • the physical broadcast channel is located at a third OFDM symbol
  • the physical broadcast channel is located in a third OFDM symbol, and at least one of the first OFDM symbol and the second OFDM symbol.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the primary synchronization signal or the secondary synchronization signal in the frequency domain.
  • the subcarrier interval of the wireless signal is a subcarrier interval determined according to a frequency band where the wireless signal is located; the subcarrier interval is 15kHz, 30kHz, or 60kHz.
  • some of the resource blocks occupied by the physical broadcast channel are used to carry demodulation reference signals.
  • part of the demodulation reference signal includes index information of the synchronous broadcast block
  • all signals in the demodulation reference signal include index information of the synchronization broadcast block
  • the demodulation reference signal does not include index information of the synchronization broadcast block.
  • the frequency band corresponding to the index information of the synchronous broadcast block is all or part of the at least one designated frequency band.
  • the period of the synchronous broadcast block is all or part of a period of at least one designated period.
  • an apparatus for transmitting information between a connected vehicle device the device being used in a first connected vehicle device, the device including:
  • An information generating module is configured to generate information carried by a synchronous broadcast block, which is used to carry signals and physical broadcast channels synchronously, and the synchronous broadcast block is located in three consecutive orthogonal frequency division multiplexes in the time domain.
  • a signal sending module configured to send a wireless signal including the synchronous broadcast block according to the information carried by the synchronous broadcast block, so that the second connected vehicle device detects the synchronous broadcast block in the wireless signal, and obtains Information carried by the synchronization broadcast block.
  • an information transmission system between connected vehicle devices including: a first connected vehicle device and a second connected vehicle device;
  • the first IoV device includes an information transmission device between the IoV devices shown in the fifth aspect;
  • the second IoV device includes an information transmission device between the IoV devices shown in the fourth aspect or any optional manner of the fourth aspect.
  • an apparatus for transmitting information between connected vehicle devices which is used in a second connected vehicle device, and the device includes:
  • a memory for storing executable instructions of the processor
  • the processor is configured to:
  • the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block occupies 3 consecutive orthogonal frequency division multiplexes in the time domain OFDM symbol
  • the information carried by the synchronization broadcast block is acquired according to a detection result.
  • an apparatus for transmitting information between connected vehicle devices which is used in a first connected vehicle device, and the device includes:
  • a memory for storing executable instructions of the processor
  • the processor is configured to:
  • Generating information carried by a synchronization broadcast block where the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block is located in three consecutive orthogonal frequency division multiplexed OFDM symbols in the time domain;
  • a computer-readable storage medium includes executable instructions, and a processor in a second connected vehicle device calls the executable instructions to implement The information transmission method between the connected vehicle devices described in the second aspect or any optional solution of the second aspect.
  • a computer-readable storage medium includes executable instructions, and a processor in a first connected vehicle device calls the executable instructions to implement The method for transmitting information between the connected vehicle devices according to the third aspect.
  • the first connected vehicle device broadcasts a synchronous broadcast block including a synchronization signal and a physical broadcast channel to the outside through 3 OFDM symbols, so that the second connected vehicle device acquires the information carried by the synchronized broadcast block according to the detection result of the synchronized broadcast block, reducing synchronization.
  • the resource occupation of the broadcast block in the time domain improves the transmission efficiency of the synchronous broadcast block.
  • FIG. 1 is a schematic diagram of a synchronous broadcast block architecture in the related art.
  • Fig. 2 is a schematic diagram showing an implementation environment involved in a method for transmitting information between connected devices in a car according to some exemplary embodiments;
  • Fig. 3 is a flow chart showing a method for transmitting information between connected devices in a car according to an exemplary embodiment
  • Fig. 4 is a flow chart showing a method for transmitting information between connected devices in a car according to an exemplary embodiment
  • Fig. 5 is a flow chart showing a method for transmitting information between connected devices in a car according to an exemplary embodiment
  • Fig. 6 is a flow chart showing a method for transmitting information between connected devices in a car according to an exemplary embodiment
  • FIG. 7 is a schematic structural diagram of a synchronous broadcast block according to the embodiment shown in FIG. 6;
  • FIG. 8 is a schematic structural diagram of another synchronous broadcast block according to the embodiment shown in FIG. 6;
  • FIG. 9 is a schematic structural diagram of still another synchronous broadcast block according to the embodiment shown in FIG. 6;
  • Fig. 10 is a block diagram of an apparatus for transmitting information between connected devices in a car according to an exemplary embodiment
  • Fig. 11 is a block diagram showing an apparatus for transmitting information between connected devices in a car according to an exemplary embodiment
  • Fig. 12 is a schematic structural diagram of a connected vehicle device according to an exemplary embodiment.
  • Vehicle-to-vehicle communication is also called V2x (vehicle totoeverything, vehicle and other equipment) communication, which includes V2V (vehicle totovehicle) communication technology, V2I (vehicle totoinfrastructure, vehicle to roadside equipment) communication technology and V2P (vehicle vehicle to person) communication technology.
  • V2x vehicle totoeverything, vehicle and other equipment
  • V2V vehicle totovehicle communication technology
  • V2I vehicle totoinfrastructure, vehicle to roadside equipment
  • V2P vehicle vehicle to person
  • the use of existing cellular communication technology to support IoV communication can effectively utilize the existing base station deployment, reduce equipment overhead, and be more conducive to providing services with QoS (Quality of Service) guarantee to meet the needs of IoV services. Therefore, the Rel-14 / 15 of LTE (Long Term Evolution, Long Term Evolution) technology provides cellular network support for V2x communication of vehicle networking, namely C-V2x (cellular based V2x).
  • LTE Long Term Evolution, Long Term Evolution
  • in-vehicle equipment and other equipment can be relayed through the base station and the core network, that is, the communication link between the terminal equipment and the base station in the original cellular network is used for communication (uplink / downlink communication)
  • the vehicle-mounted device and other devices may also communicate directly through a direct link between the devices, for example, communicate through a side link.
  • sidelink communication has the characteristics of short delay and low overhead, which is very suitable for direct communication between vehicle-mounted devices and other peripheral devices in close proximity.
  • V2x sidelink communication in LTE can support some basic security V2x applications, such as exchange of CAM (Cooperative Awareness Messages, Cooperative Awareness Messages) or DENM (Decentralized Environmental Notification Notification, Decentralized Environment Notification Message) and other BSM (Basic Safety Message Basic security information), voice broadcast communications, etc.
  • CAM Cooperative Awareness Messages, Cooperative Awareness Messages
  • DENM Decentralized Environmental Notification Notification, Decentralized Environment Notification Message
  • BSM Basic Security Information
  • voice broadcast communications etc.
  • 5G NR New Radio
  • the 3GPP working group has established a number of new business requirements for V2x communication, including vehicle management (Platooning), extended sensors (Advanced Sensors), advanced driving (Advanced driving), and remote driving (Remote driving).
  • vehicle management Platinum
  • Advanced Sensors extended sensors
  • Advanced driving Advanced driving
  • Remote driving Remote driving
  • NR V2x sidelink needs to provide higher communication rates, shorter communication delays, and more reliable communication quality.
  • V2x devices communicate with each other through sidelinks using vehicle-mounted GNSS (Global Navigation Satellite System), such as GPS or Beidou, or the synchronization signal broadcast by the base station as the synchronization reference signal for the device to ensure transmission. Between the receiver and the receiver.
  • GNSS Global Navigation Satellite System
  • V2x devices need to be able to pass through. Sidelink communicates reliably.
  • LTE V2x synchronization via a Sidelink direct link is supported, that is, a V2x device can complete synchronization between V2x devices by receiving synchronization signals broadcast by other V2x devices.
  • V2x system message broadcast is performed simultaneously through a PSBCH (Physical Sidelink Broadcast Channel) and a synchronization signal.
  • PSBCH Physical Sidelink Broadcast Channel
  • the broadcast content contains some synchronization and system configuration related information.
  • V2X's support for Sidelink the following synchronization scenarios need to be supported: that is, when V2X UE1 loses coverage or has no coverage, it synchronizes with surrounding UEs (vehicles), that is, it needs to support sidelink synchronization.
  • the synchronization broadcast block architecture is shown in FIG. 1.
  • the 5G NR synchronous broadcast block occupies at least 4 OFDM symbols in the time domain.
  • V2X's Sidelink is mainly for opportunistic localized communication between devices, it is only necessary to ensure that devices within the communication range have the same synchronization and frame structure understanding through broadcasting, so its system Compared with 5G, NR has less broadcast information. Therefore, if the 5G NR synchronous broadcast block sending method is directly used in NR V2X, it will cause excessive redundancy in the resources occupied by the synchronous broadcast block, cause waste of NR V2X communication resources, and affect the communication efficiency of NR V2X.
  • Fig. 2 is a schematic diagram illustrating an implementation environment involved in a method for transmitting information between connected vehicle devices according to some exemplary embodiments. As shown in Fig. 1, the implementation environment may include: several connected vehicle devices 210.
  • the connected vehicle device 210 is a wireless communication device supporting V2x technology.
  • the connected vehicle device 110 may support cellular mobile communication technology, for example, it may support the 4th generation mobile communication technology (4G) technology or 5G technology.
  • the IoV device 110 may also support the next-generation mobile communication technology of 5G technology.
  • the vehicle networking device 210 may be an in-vehicle communication device, for example, it may be a driving computer with a wireless communication function, or a wireless communication device with an external driving computer.
  • the connected vehicle device 210 may also be a roadside device, for example, it may be a streetlight, a signal light or other roadside device with a wireless communication function.
  • the connected vehicle device 210 may also be a user terminal device, such as a mobile phone (also referred to as a “cellular” phone) and a computer with a mobile terminal.
  • a mobile phone also referred to as a “cellular” phone
  • it may be portable, compact, handheld, built-in computer, or in-vehicle Mobile device.
  • the connected vehicle device 110 may be a mobile terminal such as a smart phone, a tablet computer, an e-book reader, or may be a smart wearable device such as smart glasses, a smart watch, or a smart bracelet.
  • Fig. 3 is a flowchart illustrating a method for transmitting information between connected devices in a vehicle according to an exemplary embodiment. As shown in Fig. 3, the method for transmitting information between connected devices in a vehicle is applied to the implementation shown in Fig. 2 In an environment, the method may include the following steps.
  • the first connected vehicle device sends a wireless signal including a synchronization broadcast block, the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block is located on three consecutive orthogonal frequencies in the time domain. Demultiplexing OFDM symbols; the second connected vehicle device receives the wireless signal.
  • step 302 the second connected vehicle device detects the synchronous broadcast block in the wireless signal.
  • step 303 the second connected vehicle device acquires the information carried by the synchronous broadcast block according to the detection result.
  • the system information is transmitted in a hierarchical manner, that is, the sending end first sends a PBCH (Physical Broadcast Channel).
  • the PBCH contains a MIB (master information block) and subsequent hierarchical transmission.
  • SIB System Information Block, System Information Block
  • RMSI Remaining minimum system information
  • OSI Open System Interconnection
  • the SSB Synchronous Signal / PBCH Block
  • OFDM Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division
  • the transmitting end (that is, the first vehicle-to-vehicle device) carries the synchronous broadcast block in 3 OFDM symbols for broadcast transmission, thereby greatly reducing Time-frequency resource occupation of synchronous broadcast blocks in V2X scenarios.
  • the first connected vehicle device broadcasts a synchronized broadcast block including a synchronization signal and a physical broadcast channel to the outside through 3 OFDM symbols, so that the second connected vehicle device according to the synchronization broadcast block.
  • the detection result obtains the information carried by the synchronous broadcast block, reduces the resource occupation amount of the synchronous broadcast block in the time domain, and improves the transmission efficiency of the synchronous broadcast block.
  • Fig. 4 is a flow chart showing a method for transmitting information between a connected vehicle device according to an exemplary embodiment. The method may be executed by a second connected vehicle device in the embodiment shown in Fig. 3. The method may include: The following steps.
  • step 401 a wireless signal sent by a first connected vehicle device is received.
  • a synchronization broadcast block is detected in the received wireless signal.
  • the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block occupies 3 consecutive orthogonal frequency division multiplexed OFDM in the time domain. symbol.
  • step 403 the information carried in the synchronous broadcast block is acquired according to the detection result.
  • the synchronization signals include a primary synchronization signal and a secondary synchronization signal
  • the primary synchronization signal is located at the first OFDM symbol, and the secondary synchronization signal is located at the second OFDM symbol.
  • the physical broadcast channel is located at the third OFDM symbol
  • the physical broadcast channel is located in the third OFDM symbol, and at least one of the first OFDM symbol and the second OFDM symbol.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the primary synchronization signal or the secondary synchronization signal in the frequency domain.
  • the subcarrier interval of the wireless signal is a subcarrier interval determined according to a frequency band in which the wireless signal is located; the subcarrier interval is 15kHz, 30kHz, or 60kHz.
  • part of the resource blocks in the resource blocks occupied by the physical broadcast channel are used to carry demodulation reference signals.
  • part of the demodulation reference signal includes index information of a synchronous broadcast block
  • all the signals in the demodulation reference signal include index information of a synchronous broadcast block
  • the demodulation reference signal does not include the index information of the synchronization broadcast block.
  • the frequency band corresponding to the index information of the synchronous broadcast block is all or part of the at least one designated frequency band.
  • the period of the synchronous broadcast block is all or a part of at least one designated period.
  • the first connected vehicle device broadcasts a synchronized broadcast block including a synchronization signal and a physical broadcast channel to the outside through 3 OFDM symbols, so that the second connected vehicle device according to the synchronization broadcast block.
  • the detection result obtains the information carried by the synchronous broadcast block, reduces the resource occupation amount of the synchronous broadcast block in the time domain, and improves the transmission efficiency of the synchronous broadcast block.
  • Fig. 5 is a flow chart showing a method for transmitting information between a connected vehicle device according to an exemplary embodiment.
  • the method may be executed by a first connected vehicle device in the embodiment shown in Fig. 3.
  • the method may include: The following steps.
  • step 501 information carried by a synchronization broadcast block is generated, the synchronization broadcast block is used to carry synchronization signals and physical broadcast channels, and the synchronization broadcast block is located in three consecutive orthogonal frequency division multiplexed OFDM symbols in the time domain.
  • a wireless signal including the synchronous broadcast block is sent according to the information carried by the synchronous broadcast block, so that the second connected vehicle device detects the synchronous broadcast block in the wireless signal, and acquires the synchronous broadcast block carry according to the detection result.
  • Information is carried by the synchronous broadcast block, so that the second connected vehicle device detects the synchronous broadcast block in the wireless signal, and acquires the synchronous broadcast block carry according to the detection result.
  • the first connected vehicle device broadcasts a synchronized broadcast block including a synchronization signal and a physical broadcast channel to the outside through 3 OFDM symbols, so that the second connected vehicle device according to the synchronization broadcast block.
  • the detection result obtains the information carried by the synchronous broadcast block, reduces the resource occupation amount of the synchronous broadcast block in the time domain, and improves the transmission efficiency of the synchronous broadcast block.
  • Fig. 6 is a flowchart illustrating a method for transmitting information between connected devices in a car according to an exemplary embodiment. As shown in Fig. 6, the method for transmitting information between connected devices in a car is applied to the implementation shown in Fig. 2 In an environment, the method may include the following steps.
  • the first connected vehicle device In step 601, the first connected vehicle device generates information carried by a synchronization broadcast block, which is used to carry synchronization signals and physical broadcast channels, and the synchronization broadcast block is located in three consecutive orthogonal frequency divisions in the time domain. Multiplexing OFDM symbols.
  • the first connected vehicle device can send a synchronous broadcast block through a side link.
  • the physical broadcast channel of V2X can be transmitted in a single stage, with multiple stages optional. That is, the system defines only one basic physical broadcast channel in sidelink.
  • the basic physical broadcast channel The broadcast channel can also be called PSBCH.
  • the basic physical broadcast channel contains basic system information required for V2X communication. Whether or not other system information exists outside the basic physical broadcast channel can be indicated by an extended indication in the physical broadcast channel.
  • the physical broadcast channel may also carry extended configuration information, and the extended configuration information may be used to indicate a resource location of other system information.
  • the synchronization signals may include PSS (Primary Synchronization Signal) and SSS (Secondary Synchronization Signal).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • the primary synchronization signal and the secondary synchronization signal may have different OFDM symbols, respectively. For example, assuming that three consecutive orthogonal frequency division multiplexed OFDM symbols where the synchronization broadcast block is located are the first OFDM symbol, the second OFDM symbol, and the third OFDM symbol, the primary synchronization signal may be located at the first OFDM symbol and the secondary synchronization signal. May be located on the second OFDM symbol.
  • the physical broadcast channel may be located in a third OFDM symbol other than the OFDM symbol in which the primary synchronization signal and the secondary synchronization signal are located.
  • FIG. 7 shows a schematic structural diagram of a synchronous broadcast block according to an embodiment of the present application.
  • the abscissa is a time domain resource and the ordinate is a frequency domain resource.
  • a synchronous broadcast block occupies 3 OFDM symbols in the time domain, of which the first OFDM among the 3 OFDM symbols The symbol carries the primary synchronization signal PSS, the middle OFDM symbol carries the physical broadcast channel, and the last OFDM symbol carries the secondary synchronization signal SSS.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the primary synchronization signal or the secondary synchronization signal in the frequency domain.
  • the physical broadcast channel is used to carry system information, and the data amount of the system information is usually larger than the data amount of the synchronization signal (whether the primary synchronization signal or the secondary synchronization signal). Therefore, the resource block occupied by the physical broadcast channel The number is also greater.
  • FIG. 8 is a schematic structural diagram of another synchronous broadcast block according to an embodiment of the present application.
  • the abscissa is a time domain resource and the ordinate is a frequency domain resource.
  • a synchronous broadcast block occupies 3 OFDM symbols in the time domain, of which the first OFDM among the 3 OFDM symbols The symbol carries the primary synchronization signal PSS, the middle OFDM symbol carries the physical broadcast channel, and the last OFDM symbol carries the secondary synchronization signal SSS.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the left and right synchronization signals in the frequency domain.
  • the height of the physical broadcast channel is greater than that of the primary synchronization signal or the secondary synchronization signal. height.
  • the physical broadcast channel is located in a third OFDM symbol, and at least one of the first OFDM symbol and the second OFDM symbol.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the synchronization signal in the frequency domain. Therefore, when the number of resource blocks occupied by the physical broadcast channel is large, Carrying on an OFDM symbol may cause the bandwidth occupied by the synchronous broadcast block to be high and waste system bandwidth resources. Therefore, in the embodiment of the present application, the physical broadcast channel may be distributed in the third OFDM symbol and the OFDM symbol in which the synchronization signal is located, so as to reduce bandwidth resource occupation on a single OFDM symbol.
  • FIG. 9 shows a schematic structural diagram of still another synchronous broadcast block according to an embodiment of the present application.
  • the abscissa is a time domain resource
  • the ordinate is a frequency domain resource.
  • a synchronous broadcast block occupies 3 OFDM symbols in the time domain, of which the first OFDM among the 3 OFDM symbols The symbol carries the primary synchronization signal PSS, the middle OFDM symbol carries the physical broadcast channel, and the last OFDM symbol carries the secondary synchronization signal SSS.
  • the last OFDM symbol carries a part of the physical broadcast channel in addition to the secondary synchronization signal SSS, which can reduce the bandwidth occupied by the physical broadcast channel in the frequency domain.
  • part of the resource blocks in the resource blocks occupied by the physical broadcast channel are used to carry demodulation reference signals.
  • a predetermined proportion of resource blocks among resource blocks occupied by a physical broadcast channel may be used to carry demodulation reference signals, for example, 30% of resource blocks among resource blocks occupied by a physical broadcast channel are used to carry demodulation. Reference signal.
  • some signals in the demodulation reference signal include index information (Index information) of the synchronous broadcast block; or, all signals in the demodulation reference signal include index information of the synchronous broadcast block; or, the demodulation reference signal does not include Index information of the synchronous broadcast block.
  • Index information index information
  • the demodulation reference signal may carry index information of the synchronous broadcast block.
  • the demodulation reference signal may carry index information of the synchronous broadcast block, or all demodulation reference signals may carry synchronization. Index information of the broadcast block.
  • the demodulation reference signal may not carry the index information of the synchronous broadcast block.
  • the frequency band corresponding to the index information of the synchronous broadcast block is all or part of the at least one designated frequency band.
  • the system may preset a small number of designated frequency bands as the frequency bands corresponding to the index information of the synchronous broadcast block.
  • the system may preset 3 frequency bands as the frequency bands corresponding to the index information of the synchronous broadcast block to reduce system complexity. Degree, simplify system design and improve transmission efficiency.
  • the system can preset three frequency bands: n77 (the frequency range is 3.3GHz to 4.2GHz), n79 (the frequency range is 4.4GHz to 5.0GHz), and the newly supported 5.9GHz frequency band for the 5G system. Specify the frequency band.
  • step 602 the first connected vehicle device sends a wireless signal including the synchronized broadcast block according to the information carried by the synchronized broadcast block, and the second connected vehicle device receives the wireless signal sent by the first connected vehicle device.
  • the subcarrier interval of the wireless signal is a subcarrier interval determined according to a frequency band in which the wireless signal is located; the subcarrier interval is 15kHz, 30kHz, or 60kHz.
  • a subcarrier interval of the wireless signal may be determined according to a frequency band of the transmitted or received wireless signal.
  • SCS subcarrier spacing
  • the SCS set contains three subcarrier intervals of 15kHz, 30kHz, and 60kHz.
  • Each frequency band corresponds to a subcarrier interval in the SCS set.
  • the n77 frequency band corresponds to a 30kHz subcarrier interval.
  • the 5.9GHz band corresponds to a subcarrier interval of 60kHz.
  • the synchronous broadcast block not only supports the carrier intervals of 15kHz and 30kHz, but also supports the carrier interval of 60kHz, thereby realizing the effective use of the high frequency part (such as the 5.9GHz frequency band) in the 5G system.
  • the period of the synchronous broadcast block is all or a part of at least one designated period.
  • the system can set a small number of designated periods in advance (for example, set 1 to 2 designated periods).
  • the first connected vehicle device can select a designated period and follow the selected designated period.
  • the specified period can be 20ms and 50ms.
  • step 603 the second connected vehicle device detects a synchronous broadcast block in the received wireless signal.
  • step 604 the second connected vehicle device acquires the information carried by the synchronous broadcast block according to the detection result.
  • the second connected vehicle device may perform synchronization signal detection on the wireless signal to detect the synchronization signal in the synchronization broadcast block, complete synchronization with the second connected vehicle device, and obtain the synchronization broadcast block.
  • System information carried in the physical broadcast channel, so as to establish a connection and communicate with the second connected vehicle device according to the system information.
  • the first connected vehicle device broadcasts a synchronized broadcast block including a synchronization signal and a physical broadcast channel to the outside through 3 OFDM symbols, so that the second connected vehicle device according to the synchronization broadcast block.
  • the detection result obtains the information carried by the synchronous broadcast block, reduces the resource occupation amount of the synchronous broadcast block in the time domain, and improves the transmission efficiency of the synchronous broadcast block.
  • Fig. 10 is a block diagram of an information transmission device between connected devices in a vehicle according to an exemplary embodiment.
  • the information transmission device between connected devices in a vehicle can be implemented through hardware or a combination of software and hardware. It is implemented as all or part of the connected vehicle device in the implementation environment shown in FIG. 2 to perform the steps performed by the second connected vehicle device in the embodiment shown in FIG. 3 or FIG. 4 or FIG. 6.
  • the information transmission device between the connected vehicle devices may include:
  • a signal receiving module 1001 configured to receive a wireless signal sent by a first connected vehicle device
  • a detection module 1002 is configured to detect a synchronization broadcast block in the received wireless signal, the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block occupies 3 consecutive time domains in the time domain. Orthogonal Frequency Division Multiplexing OFDM symbols;
  • An information acquisition module 1003 is configured to acquire information carried by the synchronous broadcast block according to a detection result.
  • the synchronization signals include a primary synchronization signal and a secondary synchronization signal
  • the primary synchronization signal is located in a first OFDM symbol, and the secondary synchronization signal is located in a second OFDM symbol.
  • the physical broadcast channel is located at a third OFDM symbol
  • the physical broadcast channel is located in a third OFDM symbol, and at least one of the first OFDM symbol and the second OFDM symbol.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the primary synchronization signal or the secondary synchronization signal in the frequency domain.
  • the subcarrier interval of the wireless signal is a subcarrier interval determined according to a frequency band where the wireless signal is located; the subcarrier interval is 15kHz, 30kHz, or 60kHz.
  • some of the resource blocks occupied by the physical broadcast channel are used to carry demodulation reference signals.
  • part of the demodulation reference signal includes index information of the synchronous broadcast block
  • all signals in the demodulation reference signal include index information of the synchronization broadcast block
  • the demodulation reference signal does not include index information of the synchronization broadcast block.
  • the frequency band corresponding to the index information of the synchronous broadcast block is all or part of the at least one designated frequency band.
  • the period of the synchronous broadcast block is all or part of a period of at least one designated period.
  • the first connected vehicle device broadcasts a synchronized broadcast block including a synchronization signal and a physical broadcast channel to the outside through 3 OFDM symbols, so that the second connected vehicle device according to the synchronization broadcast block.
  • the detection result obtains the information carried by the synchronous broadcast block, reduces the resource occupation amount of the synchronous broadcast block in the time domain, and improves the transmission efficiency of the synchronous broadcast block.
  • Fig. 11 is a block diagram of an information transmission device between connected vehicle devices according to an exemplary embodiment.
  • the information transmission device between connected vehicle devices can be implemented through hardware or a combination of software and hardware. It is implemented as all or part of the connected vehicle device in the implementation environment shown in FIG. 2 to perform the steps performed by the first connected vehicle device in the embodiment shown in FIG. 3 or FIG. 5 or FIG. 6.
  • the information transmission device between the connected vehicle devices may include:
  • An information generating module 1101 is configured to generate information carried by a synchronization broadcast block, where the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block is located in three consecutive orthogonal frequency division complexes in the time domain. Use OFDM symbols;
  • a signal sending module 1102 configured to send a wireless signal including the synchronous broadcast block according to the information carried by the synchronous broadcast block, so that the second connected vehicle device detects the synchronous broadcast block in the wireless signal, and according to the detection result Acquiring information carried by the synchronous broadcast block.
  • the first connected vehicle device broadcasts a synchronized broadcast block including a synchronization signal and a physical broadcast channel to the outside through 3 OFDM symbols, so that the second connected vehicle device according to the synchronization broadcast block.
  • the detection result obtains the information carried by the synchronous broadcast block, reduces the resource occupation amount of the synchronous broadcast block in the time domain, and improves the transmission efficiency of the synchronous broadcast block.
  • An exemplary embodiment of the present disclosure also provides an information transmission system between the connected vehicle devices, the system includes: a first connected vehicle device and a second connected vehicle device.
  • the first IoV device includes an information transmission device between the IoV devices provided in the embodiment shown in FIG. 11 above;
  • the second IoV device includes an information transmission device between the IoV devices provided in the embodiment shown in FIG. 10.
  • the device provided by the above embodiment implements its functions, only the division of the above functional modules is used as an example. In actual applications, the above functions may be allocated by different functional modules according to actual needs. That is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.
  • An exemplary embodiment of the present disclosure provides an apparatus for transmitting information between connected vehicle devices, which can implement all or part of the above-mentioned embodiment shown in FIG. 3, FIG. 4, or FIG. 6 performed by the second connected vehicle device.
  • the information transmission device between the connected vehicle devices includes: a processor and a memory for storing executable instructions of the processor;
  • the processor is configured to:
  • the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block occupies 3 consecutive orthogonal frequency division multiplexes in the time domain OFDM symbol
  • the information carried by the synchronization broadcast block is acquired according to a detection result.
  • the synchronization signals include a primary synchronization signal and a secondary synchronization signal
  • the primary synchronization signal is located in a first OFDM symbol, and the secondary synchronization signal is located in a second OFDM symbol.
  • the physical broadcast channel is located at a third OFDM symbol
  • the physical broadcast channel is located in a third OFDM symbol, and at least one of the first OFDM symbol and the second OFDM symbol.
  • the number of resource blocks occupied by the physical broadcast channel in the frequency domain is greater than the number of resource blocks occupied by the primary synchronization signal or the secondary synchronization signal in the frequency domain.
  • the subcarrier interval of the wireless signal is a subcarrier interval determined according to a frequency band where the wireless signal is located; the subcarrier interval is 15kHz, 30kHz, or 60kHz.
  • some of the resource blocks occupied by the physical broadcast channel are used to carry demodulation reference signals.
  • a part of the demodulation reference signal includes index information of the synchronous broadcast block
  • all signals in the demodulation reference signal include index information of the synchronization broadcast block
  • the demodulation reference signal does not include index information of the synchronization broadcast block.
  • the frequency band corresponding to the index information of the synchronous broadcast block is all or part of the at least one designated frequency band.
  • the period of the synchronous broadcast block is all or part of a period of at least one designated period.
  • An exemplary embodiment of the present disclosure provides an apparatus for transmitting information between connected vehicle devices, which can implement all or part of the above-mentioned embodiment shown in FIG. 3, FIG. 5 or FIG. 6 by the first connected vehicle device.
  • the information transmission device between the connected vehicle devices includes: a processor and a memory for storing executable instructions of the processor;
  • the processor is configured to:
  • Generating information carried by a synchronization broadcast block where the synchronization broadcast block is used to carry a synchronization signal and a physical broadcast channel, and the synchronization broadcast block is located in three consecutive orthogonal frequency division multiplexed OFDM symbols in the time domain;
  • the connected vehicle device includes a hardware structure and / or a software module corresponding to each function.
  • the embodiments of this disclosure can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is performed by hardware or computer software-driven hardware depends on the specific application of the technical solution and design constraints. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the technical solutions of the embodiments of the present disclosure.
  • Fig. 12 is a schematic structural diagram of a connected vehicle device according to an exemplary embodiment.
  • the connected vehicle device 1200 includes a communication unit 1204 and a processor 1202.
  • the processor 1202 may also be a controller, which is shown as "controller / processor 1202" in FIG. 12.
  • the communication unit 1204 is configured to support communication between a connected vehicle device and other network entities (such as other connected vehicle devices).
  • the connected vehicle device 1200 may further include a memory 1203, and the memory 1203 is configured to store program codes and data of the connected vehicle device 1200.
  • FIG. 12 only shows a simplified design of the connected vehicle device 1200.
  • the connected vehicle device 1200 may include any number of processors, controllers, memories, communication units, etc., and all the connected vehicle devices that can implement the embodiments of the present disclosure are within the protection scope of the embodiments of the present disclosure.
  • the functions described in the embodiments of the present disclosure may be implemented by hardware, software, firmware, or any combination thereof.
  • the functions may be stored on a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium.
  • Computer-readable media includes computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • a storage media may be any available media that can be accessed by a general purpose or special purpose computer.
  • An embodiment of the present disclosure also provides a computer storage medium for storing computer software instructions used for the first IoV device or the second IoV device, which includes a method for performing information transmission between the IoV devices. Designed procedures.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé de transmission d'informations entre des dispositifs de l'Internet des véhicules, appartenant au domaine technique des communications sans fil. Le procédé comporte les étapes suivantes: un premier dispositif de l'Internet des véhicules émet un signal radio comprenant un bloc de diffusion synchrone, le bloc de diffusion synchrone étant utilisé pour transporter un signal de synchronisation et un canal physique de diffusion, et le bloc de diffusion synchrone étant situé dans trois symboles consécutifs de multiplexage par répartition orthogonale en fréquence (MROF) dans un domaine temporel; et un second dispositif de l'Internet des véhicules reçoit le signal radio, détecte le bloc de diffusion synchrone dans le signal radio, et acquiert des informations transportées par le bloc de diffusion synchrone selon un résultat de détection. Le premier dispositif de l'Internet des véhicules diffuse extérieurement un bloc de diffusion synchrone comprenant un signal de synchronisation et un canal physique de diffusion via trois symboles MROF, de sorte que le second dispositif de l'Internet des véhicules acquiert des informations transportées par le bloc de diffusion synchrone selon le résultat de détection du bloc de diffusion synchrone, réduisant ainsi le taux d'occupation des ressources du bloc de diffusion synchrone dans le domaine temporel, et améliorant le rendement de transmission du bloc de diffusion synchrone.
PCT/CN2018/097423 2018-07-27 2018-07-27 Procédé, dispositif et système de transmission d'informations entre des dispositifs de l'internet des véhicules Ceased WO2020019297A1 (fr)

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