WO2020258289A1 - 数据发送方法、数据接收方法、装置及设备 - Google Patents

数据发送方法、数据接收方法、装置及设备 Download PDF

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Publication number
WO2020258289A1
WO2020258289A1 PCT/CN2019/093851 CN2019093851W WO2020258289A1 WO 2020258289 A1 WO2020258289 A1 WO 2020258289A1 CN 2019093851 W CN2019093851 W CN 2019093851W WO 2020258289 A1 WO2020258289 A1 WO 2020258289A1
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Prior art keywords
timing advance
timing
sending
configuration information
data
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PCT/CN2019/093851
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English (en)
French (fr)
Inventor
李媛媛
Original Assignee
北京小米移动软件有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 北京小米移动软件有限公司 filed Critical 北京小米移动软件有限公司
Priority to CN201980001173.6A priority Critical patent/CN110537374B/zh
Priority to PCT/CN2019/093851 priority patent/WO2020258289A1/zh
Publication of WO2020258289A1 publication Critical patent/WO2020258289A1/zh

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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]
    • 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 communications, and in particular to a data sending method, data receiving method, device and equipment.
  • V2X Vehicle to Everything
  • V2V Vehicle to Everything
  • X stands for any object that interacts with the vehicle.
  • X mainly includes vehicles, people, Traffic roadside infrastructure and network.
  • the information modes of V2X interaction include: between vehicle and vehicle (Vehicle to Vehicle, V2V), vehicle to road (Vehicle to Infrastructure, V2I), vehicle to person (Vehicle to Pedestrian, V2P), vehicle to network (Vehicle to Network, V2N) interaction.
  • the C in C-V2X refers to Cellular, which is a wireless communication technology for vehicles based on the evolution of cellular network communication technologies such as 4G/5G. It includes two communication interfaces: one is between cars, people, and roads.
  • the short-distance direct communication interface (PC5) and the other is the cellular communication interface (Uu), which can realize long-distance and larger-range reliable communication.
  • PC5 short-distance direct communication interface
  • Uu cellular communication interface
  • the embodiments of the present application provide a data sending method, data receiving method, device, and equipment, which can be used to solve the problem that the V2X system does not yet have a sending timing processing mechanism.
  • the technical solution is as follows:
  • a data sending method used in a V2X sending terminal the method further comprising:
  • V2X burst data is sent.
  • the determining the timing advance includes:
  • the first configuration information includes at least two timing advances
  • the determining the timing advance according to the first configuration information includes:
  • the cell coverage and the timing advance are in a positive correlation.
  • the determining the timing advance includes:
  • the timing advance is determined according to the detected timing position of the synchronization signal.
  • the determining the timing advance includes:
  • the timing advance is determined according to the path loss.
  • the determining the timing advance includes:
  • the timing advance is determined according to the second configuration information.
  • the maximum value of the timing advance is less than the length of the isolation (GP).
  • a data receiving method used in a V2X receiving device the method further comprising:
  • V2X burst data is received.
  • the receiving V2X burst data according to the timing advance includes:
  • the starting energy detection according to the timing advance and determining the starting position of the V2X burst data includes:
  • the start time of the target time period is the start position of the V2X burst data.
  • the determining the timing advance includes:
  • the maximum timing advance of the at least two timing advances is determined as the timing advance.
  • the method further includes:
  • the broadcast signal is transmitted through a broadcast channel, and the broadcast signal is used by the V2X transmitting device to determine the timing advance.
  • a V2X sending device the device further comprising:
  • a determining module configured to determine the timing advance
  • the sending module is configured to send V2X burst data according to the timing advance.
  • the determining module is configured to determine predefined first configuration information; and determine the timing advance according to the first configuration information.
  • the first configuration information includes at least two timing advances
  • the determining module is configured to determine the timing advance corresponding to the cell coverage from the at least two timing advances;
  • the cell coverage and the timing advance are in a positive correlation.
  • the determining module is configured to detect a synchronization signal sent by an access network device; and determine the timing advance according to the detected timing position of the synchronization signal.
  • the determining module is configured to receive a broadcast signal sent by an access network device; calculate the path loss of the broadcast signal according to the transmit power and the receive power of the broadcast signal; The path loss determines the timing advance.
  • the device further includes:
  • a receiving module configured to receive second configuration information sent by an access network device or a high-priority terminal, where the second configuration information is configured according to the geographic location of the V2X sending terminal;
  • the determining module is configured to determine the timing advance amount according to the second configuration information.
  • the maximum value of the timing advance is less than the length of the GP.
  • a V2X receiving device the device further comprising:
  • a determining module configured to determine the timing advance
  • the receiving module is configured to receive the V2X burst data according to the timing advance.
  • the receiving module is configured to start energy detection according to the timing advance and determine the start position of the V2X burst data.
  • the receiving module is configured to start sliding window detection according to the timing advance; when there is a first energy difference between a target time period and a historical time period greater than a threshold, and When the second energy difference between the subsequent time period in the sliding window and the historical time period continues to be higher than the threshold, it is determined that the start time of the target time period is the start position of the V2X burst data.
  • the determining module is configured to obtain at least two timing advances predefined to the V2X sending device; and to determine the maximum timing advance of the at least two timing advances, Determined as the timing advance.
  • the apparatus further includes: a sending module configured to send a broadcast signal through a broadcast channel, and the broadcast signal is used by the V2X sending device to determine the timing advance.
  • a V2X sending device including:
  • a transceiver connected to the processor
  • the processor is configured to load and execute executable instructions to implement the data sending method described in the above aspect.
  • a V2X receiving device including:
  • a transceiver connected to the processor
  • the processor is configured to load and execute executable instructions to implement the data receiving method as described above.
  • a computer-readable storage medium stores at least one instruction, at least one program, code set or instruction set, the at least one instruction, the at least A piece of program, the code set or the instruction set is loaded and executed by the processor to implement the data sending method as described above, or the data receiving method as described above.
  • the V2X sending terminal uses any one of a variety of methods to determine the timing advance; according to the timing advance, the V2X burst data is sent, so that the V2X system provides a mechanism for sending timing and improves the downlink transmission The delivery quality and success rate at the time.
  • Fig. 1 is a block diagram of a communication system provided by an exemplary embodiment of the present application
  • FIG. 2 is a flowchart of a data sending method provided by another exemplary embodiment of the present application.
  • FIG. 3 is a flowchart of a data receiving method provided by another exemplary embodiment of the present application.
  • FIG. 4 is a flowchart of a data sending method provided by another exemplary embodiment of the present application.
  • Fig. 5 is a flowchart of a data sending method provided by another exemplary embodiment of the present application.
  • FIG. 6 is a schematic diagram of a timing advance provided by another exemplary embodiment of the present application.
  • FIG. 7 is a flowchart of a data sending method provided by another exemplary embodiment of the present application.
  • FIG. 8 is a flowchart of a data sending method provided by another exemplary embodiment of the present application.
  • FIG. 9 is a flowchart of a data sending method provided by another exemplary embodiment of the present application.
  • FIG. 10 is a block diagram of a data sending device provided by another exemplary embodiment of the present application.
  • FIG. 11 is a block diagram of a data receiving device provided by another exemplary embodiment of the present application.
  • FIG. 12 is a block diagram of a terminal provided by an exemplary embodiment of the present application.
  • Fig. 13 is a block diagram of an access network device provided by an exemplary embodiment of the present application.
  • Fig. 1 shows a schematic diagram of a communication system provided by an exemplary embodiment of the present disclosure.
  • the system includes: vehicles 12, other vehicles 14, infrastructure 16, and pedestrians 18.
  • Vehicle to Vehicle refers to the communication between the vehicle 12 and other vehicles 12.
  • the own vehicle sends its own information to the other vehicle.
  • the relevant information includes speed, geographic location, direction of travel, and travel. Status, etc.
  • V2I Vehicle to Infrastructure refers to the communication between the vehicle 12 and the infrastructure 16.
  • the infrastructure 16 includes all the infrastructure encountered during the driving of the vehicle, including traffic lights, bus stops, buildings, tunnels and other buildings facility.
  • Vehicle to pedestrian refers to the communication between the vehicle 12 and the pedestrian 18.
  • Pedestrian generally refers to electronic devices with mobile communication capabilities carried by pedestrians, such as mobile phones and wearable devices.
  • wearable devices include smart bracelets, smart watches, and smart rings.
  • the vehicle 12 is referred to as a V2X transmitting terminal, and other vehicles 14, infrastructure 16 and pedestrians 18 are referred to as V2X receiving devices for example, but the two can also exchange roles, which is not limited. .
  • V2X organically connects traffic participation elements such as'people, vehicles, roads, clouds', which not only supports vehicles to obtain more information than bicycles perceive, and promotes innovation and application of autonomous driving technology; it is also conducive to building a smart transportation system , Promoting the development of new models of automobiles and transportation services is of great significance for improving transportation efficiency, saving resources, reducing pollution, reducing accident rates, and improving traffic management.
  • the physical layer structure is enhanced to support higher speeds, support for global satellite navigation system synchronization and more efficient resource allocation mechanisms and congestion control mechanisms.
  • the Uu interface includes the enhancement of uplink and downlink transmission and consideration of multi-access edge computing capabilities.
  • the communication on the PC5 port of V2X is based on D2D and uses a broadcast communication method, that is, a single vehicle broadcasts information to multiple vehicles.
  • the frame structure and pilot mapping format of LTE V2X are shown in Figure 2:
  • the fixed subcarrier interval is 15KHz
  • the scheduling is based on subframes.
  • the length of a subframe is 1ms, and there are 14 symbols in a subframe.
  • the pilot occupies four symbols, which are 3, 6, 9, 12 (the first symbol is numbered 1).
  • AGC Automatic Gain Control
  • the AGC loop is a closed loop electronic circuit, which is a negative feedback system. It can be divided into two parts, a gain controlled amplifier circuit and a control voltage forming circuit.
  • the gain controlled amplifier circuit is located in the forward amplifier path, and its gain changes with the control voltage.
  • the basic components of the control voltage forming circuit are the AGC detector and the low-pass smoothing filter, and sometimes also include components such as gate circuits and DC amplifiers.
  • the output signal u0 of the amplifying circuit is detected and filtered through a filter to remove low-frequency modulation components and noise, and then generates a voltage uc for controlling the gain-controlled amplifier.
  • u0 and uc also increase.
  • the increase of uc reduces the gain of the amplifying circuit, so that the change of the output signal is significantly smaller than the change of the input signal, achieving the purpose of automatic gain control.
  • the automatic gain control unit will output the automatic gain control factor for all received data.
  • the operation of the AGC is adjusted according to the long-term continuous reception of the signal.
  • the user's data transmission is not necessarily continuous, and the received signal will change significantly with the transmission distance. Therefore, the adjustment of AGC requires every transmission burst. get on.
  • LTE V2X In LTE V2X, all the resources of the first symbol need to be used for AGC processing and estimation, and the last symbol is used for isolation (GP) processing, which causes all data of the first symbol to be lost and cannot participate in subsequent decoding operations. This leads to poor decoding performance. In some Modulation and Coding Scheme (MCS) scenarios, it is even impossible to solve the problem at all.
  • MCS Modulation and Coding Scheme
  • one method in NR V2X is to combine GP and AGC in the first symbol for processing, that is, a period of time before the first symbol does not send any data, and the remaining part of the first symbol Used for AGC processing, and the last symbol is sent as usual.
  • Fig. 3 shows a flowchart of a data sending method provided by an exemplary embodiment of the present disclosure.
  • the present disclosure takes the V2X sending device as the execution subject for example.
  • the method includes:
  • Step 301 Determine the timing advance
  • the V2X sending device can determine the timing advance (Timing Advance, TA) in advance, so that the V2X burst data is sent in advance according to the timing advance to achieve the purpose of synchronization.
  • TA Timing Advance
  • Step 302 According to the timing advance, the V2X burst data is sent.
  • Burst data (Burst) is also called: burst, transmission burst, V2X data and other possible names.
  • burst transmission burst
  • V2X data V2X data and other possible names.
  • V2X transmission scenario there is a lot of data to be transmitted in bursts.
  • the V2X sending device sends the V2X burst data in advance according to the timing advance, so that the V2X sending device and the V2X receiving device realize timing synchronization.
  • the maximum value of the timing advance is less than the length of the GP.
  • the method provided in this embodiment uses any one of a variety of methods to determine the timing advance by the V2X sending terminal; according to the timing advance, V2X burst data is sent, so that the V2X system It provides a timing mechanism for sending, which improves the sending quality and success rate of downlink transmission.
  • Fig. 4 shows a flowchart of a data receiving method provided by an exemplary embodiment of the present disclosure.
  • This disclosure takes the V2X receiving device as the execution subject as an example.
  • the method includes:
  • Step 402 Determine the timing advance
  • the V2X receiving device determines the timing advance.
  • Step 404 Receive V2X burst data according to the timing advance.
  • the V2X receiving device receives V2X burst data according to the timing advance, so that the V2X sending device and the V2X receiving device realize timing synchronization.
  • the maximum value of the timing advance is less than the length of the GP.
  • the method provided in this embodiment uses any one of a variety of methods to determine the timing advance by the V2X receiving device; according to the timing advance, V2X burst data is received, so that the V2X
  • the system provides a sending timing mechanism, which improves the sending quality and success rate of downlink transmission.
  • the foregoing timing advance determination method includes at least one of the following types:
  • the terminal determines the timing advance by itself
  • the timing advance is configured by the network layer or high-priority terminal.
  • Fig. 5 shows a flowchart of a data sending method provided by an exemplary embodiment of the present disclosure. The method may be executed by the communication system shown in FIG. 1, and the method includes:
  • Step 501 The V2X sending device determines predefined first configuration information
  • the V2X sending device determines the predefined first configuration information.
  • the first configuration information includes at least two timing advances.
  • the first configuration information includes the correspondence between at least two timing advances and cell coverage.
  • the cell coverage and the timing advance have a positive correlation. That is, the larger the cell coverage, the greater the timing advance; the smaller the cell coverage, the smaller the timing advance.
  • Table 1 exemplarily shows the correspondence between the timing advance and the cell coverage.
  • Step 502 The V2X sending device determines the timing advance according to the first configuration information.
  • the V2X sending device obtains the cell coverage of the currently accessed cell. From the at least two timing advances, determine the timing advance corresponding to the cell coverage. For example, the V2X sending device receives the broadcast signal sent by the access network device, and obtains the cell coverage of the currently accessed cell based on the broadcast signal; another example is the V2X sending device according to the signal strength threshold in the cell handover condition or cell reselection condition, Estimate the cell coverage of the current access cell.
  • the duration 2 is determined as the timing advance corresponding to the cell coverage.
  • Step 503 The V2X sending device sends V2X burst data according to the timing advance
  • burst data (Burst) is also called: burst, transmission burst, V2X data and other possible names.
  • burst burst
  • transmission burst V2X data
  • other possible names e.g., a lot of data to be transmitted in bursts.
  • the V2X sending device when there is a Burst in the V2X sending device that needs to be sent, if the receiving time corresponding to the time-frequency resource corresponding to V2X is T and the timing advance is ⁇ t, the V2X sending device is at the time (T- ⁇ t ) Send V2X burst data in advance.
  • Step 504 The V2X receiving device obtains at least two timing advances predefined to the V2X sending device;
  • the V2X receiving device also obtains at least two timing advances predefined to the V2X sending device. For example: duration 1, duration 2, and duration 3.
  • Step 505 The V2X receiving device determines the maximum timing advance of the at least two timing advances as the timing advance;
  • the V2X receiving device determines the maximum timing advance of the at least two timing advances as the timing advance.
  • Step 506 The V2X receiving device receives the V2X burst data according to the timing advance.
  • the V2X receiving device starts sliding window detection according to the timing advance; when there is a first energy difference between the target time period and the historical time period greater than the threshold, and the second energy difference between the subsequent time period in the sliding window and the historical time period When continuously higher than the threshold, it is determined that the start time of the target time period is the start position of the burst data of V2X.
  • the V2X receiving device determines the maximum timing advance, if the receiving time corresponding to the time-frequency resource corresponding to V2X is T and the maximum timing advance is Max ⁇ t, the V2X receiving device is at time (T- Max ⁇ t) Start to receive V2X burst data.
  • the V2X receiving device starts at time (T-Max ⁇ t), and uses sliding window detection for the time-frequency resources corresponding to V2X.
  • T-Max ⁇ t uses sliding window detection for the time-frequency resources corresponding to V2X.
  • the method provided in this embodiment cooperates with at least two timing advances in a V2X transmission device in a predefined manner, and provides a transmission timing mechanism in the V2X system, which improves the transmission quality and quality of downlink transmission. Success rate.
  • Fig. 7 shows a flowchart of a data sending method provided by an exemplary embodiment of the present disclosure. The method may be executed by the communication system shown in FIG. 1, and the method includes:
  • Step 701 the V2X sending device detects the synchronization signal sent by the access network device
  • the V2X transmitting device detects the synchronization signal sent by the base station, and the synchronization signal is a signal used to determine downlink synchronization.
  • the synchronization signal includes a synchronization sequence
  • the V2X sending device finds the timing position by performing a correlation peak detection algorithm on the synchronization sequence.
  • the timing position is a time domain position for downlink synchronization.
  • Step 702 The V2X sending device determines the timing advance according to the timing position of the detected synchronization signal
  • the V2X transmitting device After determining the downlink timing position according to the synchronization signal, the V2X transmitting device determines the downlink timing change according to the difference between the earliest arrival position and the timing position of the actually received downlink signal.
  • the V2X sending device can determine the uplink timing advance according to the downlink timing change.
  • the V2X transmitting device learns from the difference between the earliest arrival position of the actually received downlink signal and the timing position.
  • the actual receiving time of the downlink signal is later than the timing time for the duration of ⁇ t, then ⁇ t is determined as Timing advance.
  • Step 703 The V2X sending device sends V2X burst data according to the timing advance
  • the V2X sending device when there is a Burst in the V2X sending device that needs to be sent, if the receiving time corresponding to the time-frequency resource corresponding to V2X is T and the timing advance is ⁇ t, the V2X sending device is at the time (T- ⁇ t ) Send V2X burst data in advance.
  • Step 704 the V2X receiving device determines the timing advance
  • the manner in which the V2X receiving device determines the timing advance includes at least one of the following:
  • the V2X receiving device estimates the timing advance according to the preamble sent by the V2X sending device. For example, the V2X sending device sends the pilot to the V2X receiving device according to the agreed transmission power. The V2X receiving device calculates the path loss experienced by the pilot during transmission according to the transmission power of the pilot (preamble) and the actual received power, and estimates the distance D between the V2X transmitting device and the V2X receiving device based on the path loss. D/2c is determined as the timing advance. Among them, c is the speed of light.
  • the V2X receiving device determines the maximum timing advance of the at least two timing advances as the timing advance.
  • the V2X receiving device determines the GP as the timing advance.
  • Step 705 The V2X receiving device receives the V2X burst data according to the timing advance.
  • the V2X receiving device determining the maximum timing advance of at least two timing advances as an example, if the time-frequency resource corresponding to V2X corresponds to the receiving time T, and the maximum timing advance is Max ⁇ t , The V2X receiving device starts to receive V2X burst data at time (T-Max ⁇ t).
  • the V2X receiving device starts at time (T-Max ⁇ t), and uses sliding window detection for the time-frequency resources corresponding to V2X.
  • T-Max ⁇ t uses sliding window detection for the time-frequency resources corresponding to V2X.
  • the method provided in this embodiment estimates a reasonable timing advance by measuring the downlink synchronization signal by the terminal itself, and provides a transmission timing mechanism in the V2X system, which improves the transmission quality and success of downlink transmission. rate.
  • Fig. 8 shows a flowchart of a data sending method provided by an exemplary embodiment of the present disclosure. The method may be executed by the communication system shown in FIG. 1, and the method includes:
  • Step 801 The V2X sending device receives the broadcast signal sent by the access network device;
  • the broadcast signal sent by the access network device carries a pilot (also called a reference signal).
  • the transmission power of the broadcast signal is known to the V2X transmission device.
  • Step 802 The V2X transmitting device calculates the path loss of the broadcast signal according to the transmitting power and receiving power of the broadcast signal;
  • the V2X transmission device knows the transmission power of the broadcast signal in advance. At the same time, the V2X transmitting device can measure the received power of the broadcast signal when receiving the broadcast signal.
  • the V2X transmitting device estimates the path loss of the broadcast signal based on the difference between the transmit power and the received power of the broadcast signal.
  • Step 803 The V2X sending device determines the timing advance according to the path loss
  • the V2X sending device estimates the distance D between the V2X sending device and the V2X receiving device based on the path loss, and determines D/2c as the timing advance. Among them, c is the speed of light.
  • Step 804 the V2X sending device sends the V2X burst data according to the timing advance
  • the V2X sending device when there is a Burst in the V2X sending device that needs to be sent, if the receiving time corresponding to the time-frequency resource corresponding to V2X is T and the timing advance is ⁇ t, the V2X sending device is at the time (T- ⁇ t ) Send V2X burst data in advance.
  • Step 805 the V2X receiving device determines the timing advance
  • the manner in which the V2X receiving device determines the timing advance includes at least one of the following:
  • the V2X receiving device estimates the timing advance according to the preamble sent by the V2X sending device. For example, the V2X sending device sends the pilot to the V2X receiving device according to the agreed transmission power. The V2X receiving device calculates the path loss experienced by the pilot during transmission according to the transmission power of the pilot (preamble) and the actual received power, and estimates the distance D between the V2X transmitting device and the V2X receiving device based on the path loss. D/2c is determined as the timing advance. Among them, c is the speed of light.
  • the V2X receiving device determines the maximum timing advance of the at least two timing advances as the timing advance.
  • the V2X receiving device determines the GP as the timing advance.
  • Step 806 The V2X receiving device receives the V2X burst data according to the timing advance.
  • the V2X receiving device determining the maximum timing advance of at least two timing advances as an example, if the time-frequency resource corresponding to V2X corresponds to the receiving time T, and the maximum timing advance is Max ⁇ t , The V2X receiving device starts to receive V2X burst data at time (T-Max ⁇ t).
  • the V2X receiving device starts at time (T-Max ⁇ t), and uses sliding window detection for the time-frequency resources corresponding to V2X.
  • T-Max ⁇ t uses sliding window detection for the time-frequency resources corresponding to V2X.
  • the method provided in this embodiment estimates a reasonable timing advance by measuring the downlink broadcast signal by the terminal itself, and provides a transmission timing mechanism in the V2X system, which improves the transmission quality and success of downlink transmission. rate.
  • Fig. 9 shows a flowchart of a data sending method provided by an exemplary embodiment of the present disclosure. The method may be executed by the communication system shown in FIG. 1, and the method includes:
  • Step 901 The V2X sending device receives second configuration information sent by the access network device or the high-priority terminal, where the second configuration information is configured according to the geographic location of the V2X sending terminal;
  • the access network device or high-priority terminal obtains the geographic location where the V2X sending device is located.
  • the V2X sending device acquires its own geographic location through a positioning component (such as a global positioning system GPS), and sends it to the access network device or high-priority terminal in advance.
  • a high-priority terminal is a terminal whose priority in the V2X service is higher than that of the current V2X sending device.
  • the access network device or high-priority terminal can also obtain the geographic location of the V2X receiving device.
  • the access network device stores its own geographical location; taking the V2X receiving device as a high-priority terminal as an example, the high-priority terminal can obtain its own location through the positioning component Geographical location.
  • the distance between the V2X sending device and the V2X receiving device is D
  • D/2c is determined as the timing advance.
  • c is the speed of light.
  • the access network device or the high-priority terminal configures the timing advance to the V2X sending device.
  • the access network device can send the second configuration information to the V2X sending device through a broadcast channel or dedicated signaling; taking a high-priority terminal as an example, a high-priority terminal can communicate to the V2X through D2D communication
  • the sending device sends the second configuration information.
  • the second configuration information carries a timing advance.
  • Step 902 The V2X sending device determines the timing advance according to the second configuration information.
  • the V2X sending device After receiving the second configuration information, the V2X sending device reads the timing advance in the second configuration information.
  • Step 903 The V2X sending device sends the V2X burst data according to the timing advance
  • the V2X sending device when there is a Burst in the V2X sending device that needs to be sent, if the receiving time corresponding to the time-frequency resource corresponding to V2X is T and the timing advance is ⁇ t, the V2X sending device is at the time (T- ⁇ t ) Send V2X burst data in advance.
  • Step 904 the V2X receiving device determines the timing advance
  • the V2X receiving device is known to the timing advance.
  • Step 905 The V2X receiving device receives the V2X burst data according to the timing advance.
  • the V2X receiving device starts at time (T-timing advance) and uses a sliding window to detect the time-frequency resources corresponding to V2X, and T is the expected receiving time.
  • T is the expected receiving time.
  • the method provided in this embodiment enables the terminal to determine a reasonable timing advance through configuration, and provides a transmission timing mechanism in the V2X system, which improves the transmission quality and success rate during downlink transmission.
  • Fig. 10 shows a block diagram of a V2X sending device provided by an exemplary embodiment of the present application.
  • the V2X sending device can be implemented as a V2X sending device through software or hardware, and the device further includes:
  • the determining module 1020 is configured to determine the timing advance
  • the sending module 1040 is configured to send V2X burst data according to the timing advance.
  • the determining module 1020 is configured to determine the predefined first configuration information; determine the timing advance according to the first configuration information.
  • the first configuration information includes at least two timing advances
  • the determining module 1020 is configured to determine the timing advance corresponding to the cell coverage from at least two timing advances;
  • the cell coverage and the timing advance have a positive correlation.
  • the determining module 1020 is configured to detect the synchronization signal sent by the access network device; and determine the timing advance according to the timing position of the detected synchronization signal.
  • the determining module 1020 is configured to receive the broadcast signal sent by the access network device; calculate the path loss of the broadcast signal according to the transmit power and the received power of the broadcast signal; determine the timing advance based on the path loss the amount.
  • the device further includes:
  • the receiving module 1060 is configured to receive second configuration information sent by an access network device or a high-priority terminal, where the second configuration information is configured according to the geographic location of the V2X sending device;
  • the determining module 1020 is configured to determine the timing advance according to the second configuration information.
  • the maximum value of the timing advance is less than the length of the GP.
  • Fig. 11 shows a block diagram of a V2X receiving device provided by an exemplary embodiment of the present application.
  • the V2X receiving device can be implemented as a V2X receiving device through software or hardware, and the device further includes:
  • the determining module 1120 is configured to determine the timing advance
  • the receiving module 1140 is configured to receive V2X burst data according to the timing advance.
  • the receiving module 1140 is configured to start energy detection according to the timing advance, and determine the start position of the V2X burst data.
  • the receiving module 1140 is configured to start sliding window detection according to the timing advance; when there is a first energy difference between the target time period and the historical time period greater than the threshold, and the value in the sliding window When the second energy difference between the subsequent time period and the historical time period continues to be higher than the threshold, it is determined that the start time of the target time period is the starting position of the V2X burst data.
  • the determining module 1120 is configured to obtain at least two timing advances predefined to the V2X sending device; determine the maximum timing advance of the at least two timing advances as the timing advance .
  • the apparatus further includes: a sending module 1160 configured to send a broadcast signal through a broadcast channel, and the broadcast signal is used by the V2X sending device to determine the timing advance.
  • a sending module 1160 configured to send a broadcast signal through a broadcast channel, and the broadcast signal is used by the V2X sending device to determine the timing advance.
  • FIG. 12 shows a schematic structural diagram of a terminal (or V2X sending device or V2X receiving device) provided by an exemplary embodiment of the present disclosure.
  • the terminal includes: a processor 1201, a receiver 1202, a transmitter 1203, a memory 1204, and a bus 1205.
  • the processor 1201 includes one or more processing cores, and the processor 1201 executes various functional applications and information processing by running software programs and modules.
  • the receiver 1202 and the transmitter 1203 may be implemented as a communication component, and the communication component may be a communication chip.
  • the memory 1204 is connected to the processor 1201 through a bus 1205.
  • the memory 1204 may be used to store at least one instruction, and the processor 1201 is used to execute the at least one instruction to implement each step in the foregoing method embodiment.
  • the memory 1204 can be implemented by any type of volatile or non-volatile storage device or a combination thereof.
  • the volatile or non-volatile storage device includes, but is not limited to: magnetic disks or optical disks, electrically erasable and programmable Read-only memory (EEPROM), erasable programmable read-only memory (EPROM), static anytime access memory (SRAM), read-only memory (ROM), magnetic memory, flash memory, programmable read-only memory (PROM) .
  • non-transitory computer-readable storage medium including instructions, such as a memory including instructions, which can be executed by the processor of the terminal to complete the control signaling detection method described above.
  • Side execution method may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
  • a non-transitory computer-readable storage medium when the instructions in the non-transitory computer storage medium are executed by the processor of the terminal, the terminal can execute the above data sending method or data receiving method.
  • Fig. 13 is a block diagram showing an access network device 1300 (or a V2X data receiving device) according to an exemplary embodiment.
  • the access network device 1300 may be a base station.
  • the access network device 1300 may include: a processor 1301, a receiver 1302, a transmitter 1303, and a memory 1304.
  • the receiver 1302, the transmitter 1303 and the memory 1304 are respectively connected to the processor 1301 through a bus.
  • the processor 1301 includes one or more processing cores, and the processor 1301 executes the method executed by the access network device in the data receiving method provided in the embodiment of the present disclosure by running software programs and modules.
  • the memory 1304 can be used to store software programs and modules. Specifically, the memory 1304 may store an operating system 1341 and an application module 1342 required by at least one function.
  • the receiver 1302 is used to receive communication data sent by other devices, and the transmitter 1303 is used to send communication data to other devices.
  • An exemplary embodiment of the present disclosure further provides a communication system, which includes: the above-mentioned V2X sending device and the above-mentioned V2X receiving device.
  • An exemplary embodiment of the present disclosure also provides a computer-readable storage medium in which at least one instruction, at least one program, code set or instruction set is stored, the at least one instruction, the At least one program, the code set, or the instruction set is loaded and executed by the processor to implement the data sending method and/or data receiving method provided by the foregoing method embodiments.

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Abstract

本公开实施例提供了一种数据发送方法、数据接收方法、装置、设备及存储介质，属于通信领域，所述方法包括：V2X发送设备确定所述定时提前量；根据所述定时提前量，将V2X的突发数据进行发送。本公开实施例通过由V2X发送终端采用多种方式中的任意一种来确定定时提前量；根据定时提前量，将V2X的突发数据进行发送，使得在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。

Description

数据发送方法、数据接收方法、装置及设备 技术领域
本公开涉及通信领域，特别涉及一种数据发送方法、数据接收方法、装置及设备。
背景技术
车用无线通信技术(Vehicle to Everything,V2X)是将车辆与一切事物相连接的新一代信息通信技术，其中V代表车辆，X代表任何与车交互信息的对象，当前X主要包含车、人、交通路侧基础设施和网络。V2X交互的信息模式包括：车与车之间(Vehicle to Vehicle,V2V)、车与路之间(Vehicle to Infrastructure,V2I)、车与人之间(Vehicle to Pedestrian,V2P)、车与网络之间(Vehicle to Network,V2N)的交互。C-V2X中的C是指蜂窝(Cellular)，它是基于4G/5G等蜂窝网通信技术演进形成的车用无线通信技术，包含了两种通信接口:一种是车、人、路之间的短距离直接通信接口(PC5)，另一种是蜂窝通信接口(Uu)，可实现长距离和更大范围的可靠通信。
然后对于V2X系统来说，尚不存在发送定时处理的机制，当存在定时滞后时会产生对下行发送的影响。
发明内容
本申请实施例提供了一种数据发送方法、数据接收方法、装置及设备，可以用来解决V2X系统尚不存在发送定时处理的机制的问题。所述技术方案如下：
根据本公开的一个方面，提供了一种数据发送方法，用于V2X发送终端中，所述方法还包括：
确定所述定时提前量；
根据所述定时提前量，将V2X的突发数据进行发送。
在一个可选的实施例中，所述确定所述定时提前量，包括：
确定预定义的第一配置信息；
根据所述第一配置信息确定所述定时提前量。
在一个可选的实施例中，所述第一配置信息包括至少两个定时提前量；
所述根据所述第一配置信息确定所述定时提前量，包括：
从所述至少两个定时提前量中，确定出与小区覆盖范围对应的定时提前量；
其中，所述小区覆盖范围和所述定时提前量呈正相关关系。
在一个可选的实施例中，所述确定定时提前量，包括：
检测接入网设备发送的同步信号；
根据检测到的所述同步信号的定时位置，确定所述定时提前量。
在一个可选的实施例中，所述确定定时提前量，包括：
接收接入网设备发送的广播信号；
根据所述广播信号的发送功率和接收功率，计算出所述广播信号的路损；
根据所述路损确定所述定时提前量。
在一个可选的实施例中，所述确定定时提前量，包括：
接收接入网设备或高优先级终端发送的第二配置信息，所述第二配置信息是根据所述V2X发送终端所处的地理位置进行配置的；
根据所述第二配置信息确定所述定时提前量。
在一个可选的实施例中，所述定时提前量的最大值小于隔离(GP)的长度。
根据本申请一个方面，提供了一种数据接收方法，用于V2X接收设备中，所述方法还包括：
确定所述定时提前量；
根据所述定时提前量，对V2X的突发数据进行接收。
在一个可选的实施例中，所述根据所述定时提前量，对V2X的突发数据进行接收，包括：
根据所述定时提前量开始能量检测，确定所述V2X的突发数据的开始位置。
在一个可选的实施例中，所述根据所述定时提前量开始能量检测，确定所述V2X的突发数据的开始位置，包括：
根据所述定时提前量开始进行滑动窗检测；
当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且所述滑动窗内的后续时间段与所述历史时间段的第二能量差值持续高于所述阈值时，确定所述目标时间段的开始时刻是所述V2X的突发数据的开始位置。
在一个可选的实施例中，所述确定所述定时提前量，包括：
获取向所述V2X发送设备预定义的至少两个定时提前量；
将所述至少两个定时提前量中的最大定时提前量，确定为所述定时提前量。
在一个可选的实施例中，所述方法还包括：
通过广播信道发送广播信号，所述广播信号被V2X发送设备用于确定所述定时提前量。
根据本申请的一个方面，提供了一种V2X发送装置，所述装置还包括：
确定模块，被配置为确定所述定时提前量；
发送模块，被配置为根据所述定时提前量，将V2X的突发数据进行发送。
在一个可选的实施例中，所述确定模块，被配置为确定预定义的第一配置信息；根据所述第一配置信息确定所述定时提前量。
在一个可选的实施例中，所述第一配置信息包括至少两个定时提前量；
所述确定模块，被配置为从所述至少两个定时提前量中，确定出与小区覆盖范围对应的定时提前量；
其中，所述小区覆盖范围和所述定时提前量呈正相关关系。
在一个可选的实施例中，所述确定模块，被配置为检测接入网设备发送的同步信号；根据检测到的所述同步信号的定时位置，确定所述定时提前量。
在一个可选的实施例中，所述确定模块，被配置为接收接入网设备发送的广播信号；根据所述广播信号的发送功率和接收功率，计算出所述广播信号的路损；根据所述路损确定所述定时提前量。
在一个可选的实施例中，所述装置还包括：
接收模块，被配置为接收接入网设备或高优先级终端发送的第二配置信息，所述第二配置信息是根据所述V2X发送终端所处的地理位置进行配置的；
所述确定模块，被配置为根据所述第二配置信息确定所述定时提前量。
在一个可选的实施例中，所述定时提前量的最大值小于GP的长度。
根据本申请的一个方面，提供了一种V2X接收装置，所述装置还包括：
确定模块，被配置为确定所述定时提前量；
接收模块，被配置为根据所述定时提前量，对所述V2X的突发数据进行接收。
在一个可选的实施例中，所述接收模块，被配置为根据所述定时提前量开始能量检测，确定所述V2X的突发数据的开始位置。
在一个可选的实施例中，所述接收模块，被配置为根据所述定时提前量开始进行滑动窗检测；当存在一个目标时间段与历史时间段的第一能量差值大于 阈值，且所述滑动窗内的后续时间段与所述历史时间段的第二能量差值持续高于所述阈值时，确定所述目标时间段的开始时刻是所述V2X的突发数据的开始位置。
在一个可选的实施例中，所述确定模块，被配置为获取向所述V2X发送设备预定义的至少两个定时提前量；将所述至少两个定时提前量中的最大定时提前量，确定为所述定时提前量。
在一个可选的实施例中，所述装置还包括：发送模块，被配置为通过广播信道发送广播信号，所述广播信号被V2X发送设备用于确定所述定时提前量。
根据本申请的一个方面，提供了一种V2X发送设备，所述设备包括：
处理器；
与所述处理器相连的收发器；
其中，所述处理器被配置为加载并执行可执行指令以实现如上方面所述的数据发送方法。
根据本申请的一个方面，提供了一种V2X接收设备，所述设备包括：
处理器；
与所述处理器相连的收发器；
其中，所述处理器被配置为加载并执行可执行指令以实现如上所述的数据接收方法。
根据本申请的一个方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或所述指令集由处理器加载并执行以实现如上所述的数据发送方法，或者，如上所述的数据接收方法。
本申请实施例提供的技术方案带来的有益效果至少包括：
通过由V2X发送终端采用多种方式中的任意一种来确定定时提前量；根据定时提前量，将V2X的突发数据进行发送，使得在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图1是本申请一个示例性实施例提供的通信系统的框图；
图2是本申请另一个示例性实施例提供的数据发送方法的流程图；
图3是本申请另一个示例性实施例提供的数据接收方法的流程图；
图4是本申请另一个示例性实施例提供的数据发送方法的流程图；
图5是本申请另一个示例性实施例提供的数据发送方法的流程图；
图6是本申请另一个示例性实施例提供的定时提前量的示意图；
图7是本申请另一个示例性实施例提供的数据发送方法的流程图；
图8是本申请另一个示例性实施例提供的数据发送方法的流程图；
图9是本申请另一个示例性实施例提供的数据发送方法的流程图；
图10是本申请另一个示例性实施例提供的数据发送装置的框图；
图11是本申请另一个示例性实施例提供的数据接收装置的框图；
图12是本申请一个示例性实施例提供的终端的框图；
图13是本申请一个示例性实施例提供的接入网设备的框图。
具体实施方式
为使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请实施方式作进一步地详细描述。
图1示出了本公开一个示意性实施例提供的通信系统的示意图。该系统包括：车辆12、其它车辆14、基础设施16和行人18。
车辆对车辆(Vehicle to Vehicle，V2V)是指车辆12与其它车辆12之间的通信，本方车辆将本方的相关信息发送给对方车辆，相关信息包括行驶速度、地理位置、行驶方向和行驶状态等。
车辆对基础设施(Vehicle to Infrastructure，V2I)是指车辆12与基础设施16之间的通信，基础设施16包括车辆行驶过程中遇到的所有基础设施，包括红绿灯、公交站、大楼和隧道等建筑设施。
车辆对行人(Vehicle to Pedestrian，V2P)是指车辆12与行人18之间的通信。行人(Pedestrian)泛指行人携带的具有移动通信能力的电子设备，比如，手机和可穿戴设备，其中，可穿戴设备包括智能手环、智能手表和智能戒指等。
在本公开实施例中，将车辆12称为V2X发送终端，将其它车辆14、基础 设施16和行人18称为V2X接收设备来举例说明，但是两者也可以互换角色，对此不加以限定。
V2X将‘人、车、路、云’等交通参与要素有机地联系在一起，不仅可以支撑车辆获得比单车感知更多的信息，促进自动驾驶技术创新和应用；还有利于构建一个智慧交通体系，促进汽车和交通服务的新模式的新业态发展，对提高交通效率、节省资源、减少污染、降低事故发生率、改善交通管理具有重要意义。
对于C-V2X关键技术来讲，在LTE的基础上有一些核心性能的提升。在PC5接口上，物理层结构进行增强支持更高的速度，支持全球卫星导航系统同步和更加高效的资源分配机制以及拥塞控制机制等。在Uu接口上，包括对上下行传输进行增强，以及考虑多接入边缘计算能力等。
在V2X的PC5口上的通信是以D2D为基础，采用的是广播式的通信方式，即由单车向多车广播发送信息。LTE V2X的帧结构及导频映射格式如图2所示：在LTE V2X中固定子载波间隔为15KHz，调度以子帧为单位，一个子帧长度为1ms，在一个子帧中有14符号，导频占用其中四个符号，分别为3，6，9，12(第一个符号编号为1)。
AGC(自动增益控制)是使放大电路的增益自动地随信号强度而调整的自动控制方法。实现这种功能的电路简称AGC环。AGC环是闭环电子电路，是一个负反馈系统，它可以分成增益受控放大电路和控制电压形成电路两部分。增益受控放大电路位于正向放大通路，其增益随控制电压而改变。控制电压形成电路的基本部件是AGC检波器和低通平滑滤波器，有时也包含门电路和直流放大器等部件。放大电路的输出信号u0经检波并经滤波器滤除低频调制分量和噪声后，产生用以控制增益受控放大器的电压uc。当输入信号ui增大时，u0和uc亦随之增大。uc增大使放大电路的增益下降，从而使输出信号的变化量显著小于输入信号的变化量，达到自动增益控制的目的。在自动增益控制单元会输出自动增益控制因子用于所有接收到的数据。
对于连续的收发的通信系统来说，比如LTE系统，AGC的操作是根据长期连续的接收信号情况做调整。对于车联网这种系统来说，用户的数据发送不一定是连续的，且接收到的信号随着传输距离会发生较大的变化，因此，AGC的调整，需要在每个传输突发都需要进行。
LTE V2X中需要采用第一个符号的全部资源用于做AGC处理和估计，最后一个符号用作隔离(GP)处理，从而导致第一个符号的数据全部丢失，无法参与到后面的解码操作，导致解码性能变差。在某些调制编码方式(Modulation and Coding Scheme，MCS)场景下，甚至完全无法解对。为了降低AGC的开销，在NR V2X里的一种方法是，将GP和AGC合并在第一个符号处理，即第一个符号前端空出一段时间不发送任何数据，第一个符号剩余的部分用于做AGC处理，而最后一个符号照常发送。
然而对于V2X系统来说，没有发送定时处理的机制。在LTE V2X阶段最后一个符号用作GP的主要作用是为了防止在V2X发送时，V2X发送终端与基站的定时不同步。避免对下行发送的影响，在NR V2X中因为将GP前移至第一个符号中，无法解决当定时滞后时对下行发送的影响。为此提供有如下实施例。
图3示出了本公开一个示例性实施例提供的数据发送方法的流程图。本公开以该V2X发送设备为执行主体来举例说明。该方法包括：
步骤301，确定定时提前量；
由于V2X发送设备和V2X接收设备存在一定的物理距离，当V2X发送设备和V2X接收设备之间通信时，会造成信号传递的时延。因此，V2X发送设备可以提前确定定时提前量(Timing Advance，TA)，从而按照定时提前量将V2X的突发数据提前进行发送，以达到同步的目的。
步骤302，根据定时提前量，将V2X的突发数据进行发送。
突发数据(Burst)也称：突发、传输突发、V2X数据等其他可能的名称。在V2X传输场景中，存在很多待传输的数据都是突发形式出现的。
V2X发送设备根据定时提前量，将V2X的突发数据进行提前发送，从而使得V2X发送设备和V2X接收设备实现定时同步。
其中，定时提前量的最大值小于GP的长度。
综上所述，本实施例提供的方法，通过由V2X发送终端采用多种方式中的任意一种来确定定时提前量；根据定时提前量，将V2X的突发数据进行发送，使得在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。
图4示出了本公开一个示例性实施例提供的数据接收方法的流程图。本公 开以该V2X接收设备为执行主体来举例说明。该方法包括：
步骤402，确定定时提前量；
与V2X发送设备相对应的，V2X接收设备确定定时提前量。
步骤404，根据定时提前量，对V2X的突发数据进行接收。
V2X接收设备根据定时提前量对V2X的突发数据进行接收，从而使得V2X发送设备和V2X接收设备实现定时同步。
其中，定时提前量的最大值小于GP的长度。
综上所述，本实施例提供的方法，通过由由V2X接收设备采用多种方式中的任意一种来确定定时提前量；根据定时提前量，将V2X的突发数据进行接收，使得在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。
上述定时提前量的确定方式至少包括如下几种中的至少一种：
1、采用预定义的方式确定定时提前量；
2、由终端自行确定定时提前量；
3、由网络层或高优先级的终端配置定时提前量。
图5示出了本公开一个示例性实施例提供的数据发送方法的流程图。该方法可以由图1所示的通信系统来执行，该方法包括：
步骤501，V2X发送设备确定预定义的第一配置信息；
在出厂配置信息或系统更新配置信息或通信协议中，V2X发送设备确定预定义的第一配置信息。
该第一配置信息包括至少两个定时提前量。
或者，第一配置信息包括至少两个定时提前量和小区覆盖范围之间的对应关系。其中，小区覆盖范围和定时提前量呈正相关关系。也即，小区覆盖范围越大，定时提前量越大；小区覆盖范围越小，定时提前量越小。
表一示例性的示出了定时提前量和小区覆盖范围之间的对应关系。
表一
定时提前量 小区覆盖范围
时长1 覆盖范围1
时长2 覆盖范围2
时长3 覆盖范围3
其中，时长1＜时长2＜时长3＜GP，覆盖范围1＜覆盖范围2＜覆盖范围3。
步骤502，V2X发送设备根据第一配置信息确定定时提前量；
V2X发送设备获取当前接入小区的小区覆盖范围。从至少两个定时提前量中，确定出与小区覆盖范围对应的定时提前量。比如，V2X发送设备接收接入网设备发送的广播信号，根据广播信号来得到当前接入小区的小区覆盖范围；又比如，V2X发送设备根据小区切换条件或小区重选条件中的信号强度阈值，估算得到当前接入小区的小区覆盖范围。
比如，当前小区的小区覆盖范围为覆盖范围2，则将时长2确定为与小区覆盖范围对应的定时提前量。
步骤503，V2X发送设备根据定时提前量，对V2X的突发数据进行发送；
V2X发送设备与V2X接收设备之间，采用V2X对应的时频资源来进行数据传输。突发数据(Burst)也称：突发、传输突发、V2X数据等其他可能的名称。在V2X传输场景中，存在很多待传输的数据都是突发形式出现的。
结合参考图6，当V2X发送设备中存在Burst需要发送时，若V2X对应的时频资源所对应的接收时刻为T，而定时提前量为△t时，V2X发送设备在时刻(T-△t)将V2X的突发数据进行提前发送。
步骤504，V2X接收设备获取向V2X发送设备预定义的至少两个定时提前量；
另一方面，V2X接收设备也获取向V2X发送设备预定义的至少两个定时提前量。比如：时长1、时长2和时长3。
步骤505，V2X接收设备将至少两个定时提前量中的最大定时提前量，确定为定时提前量；
V2X接收设备将至少两个定时提前量中的最大定时提前量，确定为定时提前量。
步骤506，V2X接收设备根据定时提前量，对V2X的突发数据进行接收。
V2X接收设备根据定时提前量开始进行滑动窗检测；当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且滑动窗内的后续时间段与历史时间段的第二能量差值持续高于阈值时，确定目标时间段的开始时刻是V2X的突发数据的开始位置。
结合参考图6，当V2X接收设备确定最大定时提前量后，若V2X对应的时 频资源所对应的接收时刻为T，而最大定时提前量为Max △t时，V2X接收设备在时刻(T-Max △t)开始对V2X的突发数据进行接收。
可选地，V2X接收设备在时刻(T-Max △t)开始，对V2X对应的时频资源采用滑动窗检测。当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且滑动窗内的后续时间段与历史时间段的第二能量差值持续高于阈值时，确定目标时间段的开始时刻是V2X的突发数据的开始位置。
综上所述，本实施例提供的方法，通过预定义的方式在V2X发送设备中配合至少两种定时提前量，在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。
图7示出了本公开一个示例性实施例提供的数据发送方法的流程图。该方法可以由图1所示的通信系统来执行，该方法包括：
步骤701，V2X发送设备检测接入网设备发送的同步信号；
V2X发送设备检测基站发送的同步信号，该同步信号是用于确定下行同步的信号。可选地，同步信号中包括同步序列，V2X发送设备通过对同步序列进行相关峰检测算法，找到定时位置。可选地，该定时位置是下行同步的时域位置。
步骤702，V2X发送设备根据检测到的同步信号的定时位置，确定定时提前量；
V2X发送设备在根据同步信号确定出下行的定时位置后，根据实际接收到的下行信号的最早达到位置与定时位置之间的差值，确定出下行定时变化。
由于下行传输和上行传输存在对称性，因此V2X发送设备能够根据下行定时变化，确定出上行的定时提前量。
示例性的，V2X发送设备根据实际接收到的下行信号的最早达到位置与定时位置之间的差值获知，下行信号的实际接收时刻晚于定时时刻的时长为△t，则将△t确定为定时提前量。
步骤703，V2X发送设备根据定时提前量，将V2X的突发数据进行发送；
结合参考图6，当V2X发送设备中存在Burst需要发送时，若V2X对应的时频资源所对应的接收时刻为T，而定时提前量为△t时，V2X发送设备在时刻(T-△t)将V2X的突发数据进行提前发送。
步骤704，V2X接收设备确定定时提前量；
V2X接收设备确定定时提前量的方式包括如下几种中的至少一种：
1、V2X接收设备根据V2X发送设备发送的导频(preamble)来估算定时提前量，比如，V2X发送设备按照约定的发送功率向V2X接收设备发送导频。V2X接收设备根据导频(preamble)的发送功率和实际接收功率，来计算导频在传输过程中所经历的路损，根据路损估算出V2X发送设备和V2X接收设备之间的距离D，将D/2c确定为定时提前量。其中，c为光速。
2、V2X接收设备将至少两个定时提前量中的最大定时提前量，确定为定时提前量。
3、V2X接收设备将GP，确定为定时提前量。
步骤705，V2X接收设备根据定时提前量，对V2X的突发数据进行接收。
结合参考图6，以V2X接收设备确定至少两个定时提前量中的最大定时提前量为例，若V2X对应的时频资源所对应的接收时刻为T，而最大定时提前量为Max △t时，V2X接收设备在时刻(T-Max △t)开始对V2X的突发数据进行接收。
可选地，V2X接收设备在时刻(T-Max △t)开始，对V2X对应的时频资源采用滑动窗检测。当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且滑动窗内的后续时间段与历史时间段的第二能量差值持续高于阈值时，确定目标时间段的开始时刻是V2X的突发数据的开始位置。
综上所述，本实施例提供的方法，通过终端自行测量下行的同步信号来估算出合理的定时提前量，在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。
图8示出了本公开一个示例性实施例提供的数据发送方法的流程图。该方法可以由图1所示的通信系统来执行，该方法包括：
步骤801，V2X发送设备接收接入网设备发送的广播信号；
接入网设备发送的广播信号中，携带有导频(也称参考信号)。该广播信号的发送功率对于V2X发送设备来讲是已知的。
步骤802，V2X发送设备根据广播信号的发送功率和接收功率，计算出广播信号的路损；
V2X发送设备预先已知广播信号的发送功率。同时，V2X发送设备在接收广播信号时，能够测得广播信号的接收功率。
V2X发送设备根据广播信号的发送功率和接收功率的差值，估算广播信号的路损。
步骤803，V2X发送设备根据路损确定定时提前量；
V2X发送设备根据路损估算出V2X发送设备和V2X接收设备之间的距离D，将D/2c确定为定时提前量。其中，c为光速。
步骤804，V2X发送设备根据定时提前量，将V2X的突发数据进行发送；
结合参考图6，当V2X发送设备中存在Burst需要发送时，若V2X对应的时频资源所对应的接收时刻为T，而定时提前量为△t时，V2X发送设备在时刻(T-△t)将V2X的突发数据进行提前发送。
步骤805，V2X接收设备确定定时提前量；
V2X接收设备确定定时提前量的方式包括如下几种中的至少一种：
1、V2X接收设备根据V2X发送设备发送的导频(preamble)来估算定时提前量，比如，V2X发送设备按照约定的发送功率向V2X接收设备发送导频。V2X接收设备根据导频(preamble)的发送功率和实际接收功率，来计算导频在传输过程中所经历的路损，根据路损估算出V2X发送设备和V2X接收设备之间的距离D，将D/2c确定为定时提前量。其中，c为光速。
2、V2X接收设备将至少两个定时提前量中的最大定时提前量，确定为定时提前量。
3、V2X接收设备将GP，确定为定时提前量。
步骤806，V2X接收设备根据定时提前量，对V2X的突发数据进行接收。
结合参考图6，以V2X接收设备确定至少两个定时提前量中的最大定时提前量为例，若V2X对应的时频资源所对应的接收时刻为T，而最大定时提前量为Max △t时，V2X接收设备在时刻(T-Max △t)开始对V2X的突发数据进行接收。
可选地，V2X接收设备在时刻(T-Max △t)开始，对V2X对应的时频资源采用滑动窗检测。当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且滑动窗内的后续时间段与历史时间段的第二能量差值持续高于阈值时，确定目标时间段的开始时刻是V2X的突发数据的开始位置。
综上所述，本实施例提供的方法，通过终端自行测量下行的广播信号来估算出合理的定时提前量，在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。
图9示出了本公开一个示例性实施例提供的数据发送方法的流程图。该方法可以由图1所示的通信系统来执行，该方法包括：
步骤901，V2X发送设备接收接入网设备或高优先级终端发送的第二配置信息，第二配置信息是根据V2X发送终端所处的地理位置进行配置的；
接入网设备或高优先级终端获取V2X发送设备所在的地理位置。示例性的，V2X发送设备通过定位组件(比如全球定位系统GPS)获取到的自身的地理位置，提前发送给接入网设备或高优先级终端。高优先级终端是在V2X业务中的优先级高于当前的V2X发送设备的优先级的终端。
接入网设备或高优先级终端还能够获取V2X接收设备所在的地理位置。以V2X接收设备是接入网设备为例，接入网设备内部存储有自身所在的地理位置；以V2X接收设备是高优先级终端为例，高优先级终端能够通过定位组件来获取到自身的地理位置。
设V2X发送设备和V2X接收设备之间的距离为D，将D/2c确定为定时提前量。其中，c为光速。
然后，接入网设备或高优先级终端向V2X发送设备配置该定时提前量。以接入网设备为例，接入网设备可以通过广播信道或专有信令向V2X发送设备发送第二配置信息；以高优先级终端为例，高优先级终端可以通过D2D通信来向V2X发送设备发送第二配置信息。其中，第二配置信息中携带有定时提前量。
步骤902，V2X发送设备根据第二配置信息确定定时提前量；
V2X发送设备在接收到第二配置信息后，读取第二配置信息中的定时提前量。
步骤903，V2X发送设备根据定时提前量，将V2X的突发数据进行发送；
结合参考图6，当V2X发送设备中存在Burst需要发送时，若V2X对应的时频资源所对应的接收时刻为T，而定时提前量为△t时，V2X发送设备在时刻(T-△t)将V2X的突发数据进行提前发送。
步骤904，V2X接收设备确定定时提前量；
由于上述定时提前量是接入网设备或高优先级设备配置的，因此V2X接收设备对该定时提前量是已知的。
步骤905，V2X接收设备根据定时提前量，对V2X的突发数据进行接收。
可选地，V2X接收设备在时刻(T-定时提前量)开始，对V2X对应的时频 资源采用滑动窗检测，T为期望接收时刻。当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且滑动窗内的后续时间段与历史时间段的第二能量差值持续高于阈值时，确定目标时间段的开始时刻是V2X的突发数据的开始位置。
综上所述，本实施例提供的方法，通过配置的方式使得终端能够确定出合理的定时提前量，在V2X系统中提供了发送定时的机制，提高了下行传输时的发送质量和成功率。
以下为本申请实施例的装置实施例，对于装置实施例中未详细描述的细节，可以参考上述一一对应的方法实施例。
图10示出了本申请的一个示例性实施例提供的V2X发送装置的框图。该V2X发送装置可以通过软件或硬件实现成为V2X发送设备中，所述装置还包括：
确定模块1020，被配置为确定定时提前量；
发送模块1040，被配置为根据定时提前量，将V2X的突发数据进行发送。
在一个可选的实施例中，确定模块1020，被配置为确定预定义的第一配置信息；根据第一配置信息确定定时提前量。
在一个可选的实施例中，第一配置信息包括至少两个定时提前量；
确定模块1020，被配置为从至少两个定时提前量中，确定出与小区覆盖范围对应的定时提前量；
其中，小区覆盖范围和定时提前量呈正相关关系。
在一个可选的实施例中，确定模块1020，被配置为检测接入网设备发送的同步信号；根据检测到的同步信号的定时位置，确定定时提前量。
在一个可选的实施例中，确定模块1020，被配置为接收接入网设备发送的广播信号；根据广播信号的发送功率和接收功率，计算出广播信号的路损；根据路损确定定时提前量。
在一个可选的实施例中，所述装置还包括：
接收模块1060，被配置为接收接入网设备或高优先级终端发送的第二配置信息，第二配置信息是根据V2X发送设备所处的地理位置进行配置的；
确定模块1020，被配置为根据第二配置信息确定定时提前量。
在一个可选的实施例中，定时提前量的最大值小于GP的长度。
图11示出了本申请的一个示例性实施例提供的V2X接收装置的框图。该V2X接收装置可以通过软件或硬件实现成为V2X接收设备中，所述装置还包括：
确定模块1120，被配置为确定定时提前量；
接收模块1140，被配置为根据定时提前量，对V2X的突发数据进行接收。
在一个可选的实施例中，接收模块1140，被配置为根据定时提前量开始能量检测，确定V2X的突发数据的开始位置。
在一个可选的实施例中，接收模块1140，被配置为根据定时提前量开始进行滑动窗检测；当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且滑动窗内的后续时间段与历史时间段的第二能量差值持续高于阈值时，确定目标时间段的开始时刻是V2X的突发数据的开始位置。
在一个可选的实施例中，确定模块1120，被配置为获取向V2X发送设备预定义的至少两个定时提前量；将至少两个定时提前量中的最大定时提前量，确定为定时提前量。
在一个可选的实施例中，所述装置还包括：发送模块1160，被配置为通过广播信道发送广播信号，广播信号被V2X发送设备用于确定定时提前量。
图12示出了本公开一个示例性实施例提供的终端(或称V2X发送设备、V2X接收设备)的结构示意图，该终端包括：处理器1201、接收器1202、发射器1203、存储器1204和总线1205。
处理器1201包括一个或者一个以上处理核心，处理器1201通过运行软件程序以及模块，从而执行各种功能应用以及信息处理。
接收器1202和发射器1203可以实现为一个通信组件，该通信组件可以是一块通信芯片。
存储器1204通过总线1205与处理器1201相连。
存储器1204可用于存储至少一个指令，处理器1201用于执行该至少一个指令，以实现上述方法实施例中的各个步骤。
此外，存储器1204可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，易失性或非易失性存储设备包括但不限于：磁盘或光盘，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，静态随时存取存储器(SRAM)，只读存储器(ROM)，磁存储器，快闪存储器，可编程只读存储器(PROM)。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器，上述指令可由终端的处理器执行以完成上述控制信令的检测方法中由终端侧执行的方法。例如，所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
一种非临时性计算机可读存储介质，当所述非临时性计算机存储介质中的指令由终端的处理器执行时，使得终端能够执行上述数据发送方法或数据接收方法。
图13是根据一示例性实施例示出的一种接入网设备1300(或称V2X的数据接收设备)的框图。该接入网设备1300可以是基站。
接入网设备1300可以包括：处理器1301、接收机1302、发射机1303和存储器1304。接收机1302、发射机1303和存储器1304分别通过总线与处理器1301连接。
其中，处理器1301包括一个或者一个以上处理核心，处理器1301通过运行软件程序以及模块以执行本公开实施例提供的数据接收方法中接入网设备所执行的方法。存储器1304可用于存储软件程序以及模块。具体的，存储器1304可存储操作系统1341、至少一个功能所需的应用程序模块1342。接收机1302用于接收其他设备发送的通信数据，发射机1303用于向其他设备发送通信数据。
本公开一示例性实施例还提供了一种通信系统，所述系统包括：上述V2X发送设备和上述V2X接收设备。
本公开一示例性实施例还提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或指令集由所述处理器加载并执行以实现上述各个方法实施例提供的数据发送方法和/或数据接收方法。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种计算机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上所述仅为本申请的较佳实施例，并不用以限制本申请，凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (27)

  1. 一种数据发送方法，其特征在于，用于车联网V2X发送设备中，所述方法还包括：
    确定所述定时提前量；
    根据所述定时提前量，将所述V2X的突发数据进行发送。
  2. 根据权利要求1所述的方法，其特征在于，所述确定所述定时提前量，包括：
    确定预定义的第一配置信息；
    根据所述第一配置信息确定所述定时提前量。
  3. 根据权利要求2所述的方法，其特征在于，所述第一配置信息包括至少两个定时提前量；
    所述根据所述第一配置信息确定所述定时提前量，包括：
    从所述至少两个定时提前量中，确定出与小区覆盖范围对应的定时提前量；
    其中，所述小区覆盖范围和所述定时提前量呈正相关关系。
  4. 根据权利要求1所述的方法，其特征在于，所述确定定时提前量，包括：
    检测接入网设备发送的同步信号；
    根据检测到的所述同步信号的定时位置，确定所述定时提前量。
  5. 根据权利要求1所述的方法，其特征在于，所述确定定时提前量，包括：
    接收接入网设备发送的广播信号；
    根据所述广播信号的发送功率和接收功率，计算出所述广播信号的路损；
    根据所述路损确定所述定时提前量。
  6. 根据权利要求1所述的方法，其特征在于，所述确定定时提前量，包括：
    接收接入网设备或高优先级终端发送的第二配置信息，所述第二配置信息是根据所述V2X发送设备所处的地理位置进行配置的；
    根据所述第二配置信息确定所述定时提前量。
  7. 根据权利要求1至6任一所述的方法，其特征在于，所述定时提前量的最大值小于隔离GP的长度。
  8. 一种数据接收方法，其特征在于，用于车联网V2X接收设备中，所述方法还包括：
    确定所述定时提前量；
    根据所述定时提前量，对所述V2X的突发数据进行接收。
  9. 根据权利要求8所述的方法，其特征在于，所述根据所述定时提前量，对V2X的突发数据进行接收，包括：
    根据所述定时提前量开始能量检测，确定所述V2X的突发数据的开始位置。
  10. 根据权利要求9所述的方法，其特征在于，所述根据所述定时提前量开始能量检测，确定所述V2X的突发数据的开始位置，包括：
    根据所述定时提前量开始进行滑动窗检测；
    当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且所述滑动窗内的后续时间段与所述历史时间段的第二能量差值持续高于所述阈值时，确定所述目标时间段的开始时刻是所述V2X的突发数据的开始位置。
  11. 根据权利要求8所述的方法，其特征在于，所述确定所述定时提前量，包括：
    获取向所述V2X发送设备预定义的至少两个定时提前量；
    将所述至少两个定时提前量中的最大定时提前量，确定为所述定时提前量。
  12. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    通过广播信道发送广播信号，所述广播信号被V2X发送设备用于确定所述定时提前量。
  13. 一种车联网V2X发送装置，其特征在于，所述装置还包括：
    确定模块，被配置为确定所述定时提前量；
    发送模块，被配置为根据所述定时提前量，将所述V2X的突发数据进行发送。
  14. 根据权利要求13所述的装置，其特征在于，
    所述确定模块，被配置为确定预定义的第一配置信息；根据所述第一配置信息确定所述定时提前量。
  15. 根据权利要求14所述的装置，其特征在于，所述第一配置信息包括至少两个定时提前量；
    所述确定模块，被配置为从所述至少两个定时提前量中，确定出与小区覆盖范围对应的定时提前量；
    其中，所述小区覆盖范围和所述定时提前量呈正相关关系。
  16. 根据权利要求13所述的装置，其特征在于，
    所述确定模块，被配置为检测接入网设备发送的同步信号；根据检测到的所述同步信号的定时位置，确定所述定时提前量。
  17. 根据权利要求13所述的装置，其特征在于，
    所述确定模块，被配置为接收接入网设备发送的广播信号；根据所述广播信号的发送功率和接收功率，计算出所述广播信号的路损；根据所述路损确定所述定时提前量。
  18. 根据权利要求13所述的装置，其特征在于，所述装置还包括：
    接收模块，被配置为接收接入网设备或高优先级终端发送的第二配置信息，所述第二配置信息是根据所述V2X发送设备所处的地理位置进行配置的；
    所述确定模块，被配置为根据所述第二配置信息确定所述定时提前量。
  19. 根据权利要求13至18任一所述的装置，其特征在于，所述定时提前量的最大值小于隔离GP的长度。
  20. 一种车联网V2X接收装置，其特征在于，所述装置还包括：
    确定模块，被配置为确定所述定时提前量；
    接收模块，被配置为根据所述定时提前量，对所述V2X的突发数据进行接收。
  21. 根据权利要求20所述的装置，其特征在于，
    所述接收模块，被配置为根据所述定时提前量开始能量检测，确定所述V2X的突发数据的开始位置。
  22. 根据权利要求21所述的装置，其特征在于，
    所述接收模块，被配置为根据所述定时提前量开始进行滑动窗检测；当存在一个目标时间段与历史时间段的第一能量差值大于阈值，且所述滑动窗内的后续时间段与所述历史时间段的第二能量差值持续高于所述阈值时，确定所述目标时间段的开始时刻是所述V2X的突发数据的开始位置。
  23. 根据权利要求20所述的装置，其特征在于，
    所述确定模块，被配置为获取向所述V2X发送设备预定义的至少两个定时提前量；将所述至少两个定时提前量中的最大定时提前量，确定为所述定时提前量。
  24. 根据权利要求20所述的装置，其特征在于，所述装置还包括：
    发送模块，被配置为通过广播信道发送广播信号，所述广播信号被V2X发送设备用于确定所述定时提前量。
  25. 一种车联网V2X发送设备，其特征在于，所述设备包括：
    处理器；
    与所述处理器相连的收发器；
    其中，所述处理器被配置为加载并执行可执行指令以实现如权利要求1至7任一所述的数据发送方法。
  26. 一种车联网V2X接收设备，其特征在于，所设备包括：
    处理器；
    与所述处理器相连的收发器；
    其中，所述处理器被配置为加载并执行可执行指令以实现如权利要求8至12任一所述的数据接收方法。
  27. 一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令、至少一段程序、代码集或指令集，所述至少一条指令、所述至少一段程序、所述代码集或所述指令集由处理器加载并执行以实现如权利要求1至7任一所述的数据发送方法，或者，如权利要求8至12任一所述的数据接收方法。
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