WO2017185295A1 - Procédé de communication, dispositif côté réseau et dispositif terminal de véhicule - Google Patents

Procédé de communication, dispositif côté réseau et dispositif terminal de véhicule Download PDF

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Publication number
WO2017185295A1
WO2017185295A1 PCT/CN2016/080502 CN2016080502W WO2017185295A1 WO 2017185295 A1 WO2017185295 A1 WO 2017185295A1 CN 2016080502 W CN2016080502 W CN 2016080502W WO 2017185295 A1 WO2017185295 A1 WO 2017185295A1
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WIPO (PCT)
Prior art keywords
vehicle
terminal device
information
network side
vehicle terminal
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PCT/CN2016/080502
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English (en)
Chinese (zh)
Inventor
孙继忠
陈亮
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华为技术有限公司
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Priority to PCT/CN2016/080502 priority Critical patent/WO2017185295A1/fr
Publication of WO2017185295A1 publication Critical patent/WO2017185295A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup

Definitions

  • the present invention relates to the field of communications, and in particular, to a communication method, a network side device, and a vehicle terminal device.
  • VDC Vehicle Direct Communication
  • V2V vehicle-to-vehicle
  • communication between vehicle terminals can be performed without communication of the network-side devices, and the network-side devices can perform resource configuration, scheduling, coordination, etc., between the auxiliary terminals.
  • Direct communication When the network side configures the wireless parameter and the resource scheduling for the vehicle terminal, the vehicle terminal needs to send a resource scheduling request to the network side device (such as the base station), and requests the network side device to allocate the VDC wireless resource thereto. After receiving the request from the vehicle terminal, the network side device allocates a VDC radio resource to the vehicle terminal, and transmits the allocated information of the radio resource to the vehicle terminal. After the vehicle terminal acquires the information of the wireless resource, the wireless terminal can use the wireless resource to send information to other vehicles.
  • the network side device such as the base station
  • VDC When VDC is performed between vehicle terminals, if different vehicles use the same time-frequency resources or different time-frequency resources, the effects of the near-far effect may occur.
  • the network-side device allocates different VDC radio resources to different vehicle terminals, but this may result in waste of radio resources, that is, reduce utilization of radio resources.
  • the present invention provides a communication method, a network side device, and a vehicle terminal device, which can improve the utilization of wireless resources of a VDC.
  • the present invention provides a communication method, including: a network side device receiving a resource scheduling request sent by at least one vehicle terminal device, where the resource scheduling request is used to request the network side device to correspond to the resource scheduling request
  • Vehicle terminal device allocates radio resources for vehicle direct communication VDC
  • the network side device receives vehicle state information transmitted by the at least one vehicle terminal device, the vehicle state information including a location of the vehicle corresponding to the vehicle state information Information
  • the network side device allocates a radio resource for the VDC to the at least one vehicle terminal device according to the vehicle state information
  • the network side device sends a control message to the at least one vehicle terminal device, the control message And carrying information about the radio resource of the VDC by the vehicle terminal device corresponding to the control message.
  • the network side device acquires vehicle state information of the vehicle, and then allocates a wireless resource for the VDC to the vehicle terminal device according to the location information of the vehicle carried in the vehicle state information. Therefore, the wireless resources can be reasonably utilized to improve the utilization of resources.
  • the network side device allocates radio resources for the VDC to the at least one vehicle terminal device according to the vehicle state information, including: the network side device according to the at least one vehicle terminal The location information of the vehicle to which the device belongs is assigned to the same wireless terminal resource for the VDC for different vehicle terminal devices in the at least one vehicle terminal device.
  • the wireless resource is allocated to the vehicle terminal device according to the location information of the vehicle, for example, according to the location information of the vehicle, and the wireless resource is allocated to the vehicle terminal device by using a multiplexing technology or a ZONE technology.
  • the vehicle terminal devices of the vehicles located at different locations can use the same radio resources (or time-frequency resources), thereby achieving different resource utilization differences, and also reducing the effects of VDC transmission delay and eliminating near-far effects.
  • the network side device sends a control message to the at least one vehicle terminal device, where the network side device determines, according to the location information of the vehicle to which the at least one vehicle terminal device belongs The sequence in which the at least one vehicle terminal device sends the control message; the network side device sends the control message to the at least one vehicle terminal device according to the sequence.
  • the sequence of the network side device transmitting the control message to the vehicle terminal device may be determined according to the position information of the vehicle according to the position of the vehicle, and the control message is sent according to the sequence.
  • the scheduling delay of the radio resources for the VDC can be reduced.
  • the network side device receiving the vehicle state information sent by the at least one vehicle terminal device includes: the network side device receiving the at least one vehicle in a first scheduling period of the resource pool The vehicle status information sent by the terminal device; the network side device sending the control message to the at least one vehicle terminal device, where the network side device is in the Mth to Nth downlink sub-times in the first scheduling period Sending, by the frame, a control message to the at least one vehicle terminal device, where the control message is carried on a physical downlink control channel PDCCH, the first tone
  • the N period includes N downlink subframes, 1 ⁇ M ⁇ N.
  • the network side device first acquires vehicle state information of the vehicle in the same resource scheduling period, allocates VDC radio resources according to the vehicle state information, and then sends a control message in the last NM downlink subframes. In order to inform the vehicle terminal device VDC of the radio resource information, the scheduling delay of the VDC radio resource can be saved.
  • the network side device may send a control message to the vehicle terminal device in the Nth downlink subframe, so that the device may perform resource scheduling for a larger number of vehicle terminals while saving the scheduling delay.
  • the network side device receiving the vehicle state information sent by the at least one vehicle terminal device includes: the network side device receiving the at least one vehicle in a first scheduling period of the resource pool The vehicle status information sent by the terminal device; the network side device sending the control message to the at least one vehicle terminal device, the network side device to the at least one scheduling period of the first scheduling period to the at least one A vehicle terminal device transmits a control message, and the control message is carried on the PDCCH.
  • the vehicle state information of the vehicle is acquired in the last resource scheduling period, and then the VDC radio resource is allocated according to the vehicle state information, and then the control message is sent to the vehicle terminal device in the next resource scheduling period, thereby increasing the The number of vehicle terminal devices that schedule VDC radio resources.
  • the network side device receiving the vehicle state information sent by the at least one vehicle terminal device includes: the network side device receiving the at least one vehicle terminal device on a physical uplink shared channel PUSCH The transmitted vehicle state information carried in the MAC Control Unit CE in the Medium Access Control MAC Protocol Data Unit PDU.
  • the vehicle terminal device forms a MAC PDU by means of a MAC CE, and is carried on the PUSCH to report to the network side device, and can report the vehicle flexibly, independently, and accurately in a case where the existing protocol modification is relatively small. Status information, and can also reduce reporting delays.
  • the communication method before the network side device receives the vehicle state information sent by the at least one vehicle terminal device, the communication method further includes: the network side device transmitting the configuration to the at least one vehicle terminal device Parameter information, the configuration parameter information is used to indicate that the vehicle state information sent by the at least one vehicle terminal device needs to include location information of a vehicle to which the vehicle terminal device belongs; wherein the network side device receives at least one vehicle terminal device hair
  • the vehicle state information sent includes: the network side device receiving vehicle state information transmitted by each of the at least one vehicle terminal device according to the configuration parameter information, wherein the vehicle state information includes the vehicle terminal device Location information of the vehicle to which it belongs.
  • the network side device sends configuration parameter information indicating the content of the vehicle state information to the vehicle terminal device, and then the vehicle terminal device can report the vehicle state information of the vehicle to the network side device according to the parameter configured by the network side device. In this way, the vehicle terminal device can flexibly report the state information of the vehicle according to the needs of the network side device.
  • the configuration parameter information is further used to indicate a period in which the at least one vehicle terminal device sends vehicle state information; wherein the network side device receives each of the at least one vehicle terminal device The vehicle terminal device transmits the vehicle state information according to the configuration parameter information, where the vehicle state information includes location information of the vehicle to which the vehicle terminal device belongs, and the network side device receives the at least one vehicle terminal device according to the location The vehicle status information transmitted periodically, the vehicle status information including location information of the vehicle described by the vehicle terminal device.
  • the vehicle terminal device can report the state information of the vehicle to the network vehicle device according to the period indicated in the configuration parameter sent by the network side device, so that the vehicle state information recorded on the network side device can be updated in time,
  • the network side device is enabled to more accurately allocate VDC radio resources to the vehicle terminal device according to the latest vehicle status information.
  • the configuration parameter information is further used to indicate a maximum number of bytes of vehicle state information sent by the at least one vehicle terminal device; wherein the network side device receives the at least one vehicle terminal The vehicle state information sent by the device according to the configuration parameter information, the vehicle state information including location information of the vehicle corresponding to the vehicle terminal device, including: the network side device receiving the at least one vehicle terminal device according to the configuration Vehicle state information transmitted by the parameter information, the vehicle state information including location information of the vehicle to which the vehicle terminal device belongs, the number of bytes of the vehicle state information being less than or equal to the maximum number of bytes.
  • the network side device indicates the number of bytes of the reported vehicle state information for the vehicle terminal device, and then the vehicle terminal device can report the vehicle state information according to the number of bytes, thereby preventing the vehicle terminal device from transmitting more than The number of bytes of vehicle status information causes a problem of wasted resources. .
  • the network side device determines the maximum number of bytes according to a cell coverage of the network side device.
  • the maximum number of bytes of the vehicle state information is flexibly determined according to the coverage of the cell, and the resource carrying the vehicle state information can be reasonably utilized to improve the utilization rate of the resource carrying the vehicle state information.
  • the configuration parameter information is further used to indicate at least one of the vehicle state information that needs to include direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and altitude information of the vehicle.
  • the network side device receives vehicle state information that is sent by the at least one vehicle terminal device according to the configuration parameter information, where the vehicle state information includes location information corresponding to the vehicle terminal device, including: the network side Receiving, by the device, vehicle state information transmitted by the at least one vehicle terminal device according to the configuration parameter information, the vehicle state information including at least one of location information of a vehicle to which the vehicle terminal device belongs and information: the vehicle Direction information, speed information of the vehicle, acceleration information of the vehicle, and geographic height information of the vehicle.
  • the vehicle terminal device when the vehicle terminal device reports the speed information or the acceleration information of the vehicle according to the indication of the configuration parameter information of the network side device, the frequent switching problem caused by the vehicle terminal quickly exiting the cell can be reduced; the reporting direction information is reported.
  • the network side device can determine the driving trajectory of the vehicle to perform the warning prompt between the vehicles, when the geographic height information is reported, the network side device can obtain more accurate position information of the vehicle.
  • the present invention provides a communication method, including: a vehicle terminal device transmitting vehicle state information to a network side device, the vehicle state information including location information of a vehicle to which the vehicle terminal device belongs; the vehicle terminal device Transmitting, to the network side device, a resource scheduling request, where the resource scheduling request is used to request the network side device to allocate radio resource information for a vehicle direct communication VDC to the vehicle; and the vehicle terminal device receives the network side A control message sent by the device, where the control message carries the radio resource information.
  • the vehicle terminal device reports the vehicle state information of the vehicle to the network side device, so that the network side device can allocate the wireless resource for the VDC to the vehicle terminal device according to the location information of the vehicle carried by the vehicle state information. Therefore, the wireless resources can be reasonably utilized to improve the utilization of resources.
  • the vehicle terminal device sends the vehicle state information to the network side device, including: the vehicle terminal device controls the MAC in the MAC protocol data unit PDU through the media access on the physical uplink shared channel PUSCH.
  • the control unit CE transmits the vehicle status information to the network side device.
  • the vehicle terminal device forms a MAC PDU by means of a MAC CE, and is carried on the PUSCH to report to the network side device, and can report the vehicle flexibly, independently, and accurately in a case where the existing protocol modification is relatively small. Status information, and can also reduce reporting delays.
  • the communication method before the vehicle terminal device sends the vehicle state information to the network side device, the communication method further includes: the vehicle terminal device receiving the configuration parameter information sent by the network side device, where The configuration parameter information is used to indicate that the vehicle state information transmitted by the vehicle terminal device needs to include location information of a vehicle to which the vehicle terminal device belongs; wherein the vehicle terminal device sends vehicle state information to the network side device, including The vehicle terminal device transmits the vehicle state information to the network side device according to the configuration parameter information, where the vehicle state information includes location information of a vehicle to which the vehicle terminal device belongs.
  • the vehicle terminal device can report the vehicle state information of the vehicle to the network side device according to the parameter configured by the network side device. In this way, the vehicle terminal device can flexibly report the state information of the vehicle according to the needs of the network side device.
  • the configuration parameter information is further used to indicate a period in which the vehicle terminal device sends the vehicle state information, where the vehicle terminal device sends the vehicle terminal device to the network side according to the configuration parameter information.
  • the device sends the vehicle status information, where the vehicle status information includes location information of the vehicle to which the vehicle terminal device belongs, including: the vehicle terminal device according to the period, according to the configuration parameter information, to the network side
  • the device transmits the vehicle status information, the vehicle status information including location information of a vehicle to which the vehicle terminal device belongs.
  • the vehicle terminal device can report the state information of the vehicle to the network vehicle device according to the period indicated in the configuration parameter sent by the network side device, so that the vehicle state information recorded on the network side device can be updated in time,
  • the network side device is enabled to more accurately allocate VDC radio resources to the vehicle terminal device according to the latest vehicle status information.
  • the vehicle terminal device sends the vehicle state information to the network side device according to the configuration parameter information, where the vehicle state information includes a location of a vehicle to which the vehicle terminal device belongs
  • the information includes: the vehicle terminal device sends the vehicle state information to the network side device according to the configuration parameter information when an emergency event occurs in the vehicle, where the vehicle state information includes the vehicle terminal device Location information of the vehicle.
  • the vehicle terminal device can report the state of the vehicle when the emergency event is sent in the vehicle. Information so that the status information of the vehicle can be reported in a more timely manner in an emergency.
  • the configuration parameter information is further used to indicate a maximum number of bytes of vehicle state information sent by the vehicle terminal device, where the vehicle terminal device reports the information according to the configuration parameter information.
  • the network side device sends the vehicle state information, where the vehicle state information includes the location information of the vehicle to which the vehicle terminal device belongs, and includes: the vehicle terminal device sends the vehicle state information to the network side device according to the configuration parameter information,
  • the vehicle state information includes location information of a vehicle to which the vehicle terminal device belongs, and the number of bytes of the vehicle state information is less than or equal to the maximum number of bytes.
  • the vehicle terminal device can report the vehicle state information according to the maximum number of bytes configured by the network side device, so that the vehicle terminal device can avoid the uplink resource caused by the vehicle state information exceeding the maximum number of bytes. waste.
  • the receiving, by the vehicle terminal device, the control message sent by the network side device includes: receiving, by the vehicle terminal device, a physical downlink control channel PDCCH control message sent by the network side device, where The PDCCH control message carries radio resource information for the VDC to which the vehicle to which the vehicle terminal device belongs.
  • the configuration parameter information is further used to indicate that the vehicle state information needs to include direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and the vehicle.
  • At least one of the geographic height information; wherein the vehicle terminal device transmits vehicle state information to the network side device, the vehicle state information including location information of the vehicle to which the vehicle terminal device belongs includes: the vehicle The terminal device transmits vehicle state information to the network side device according to the configuration parameter information, the vehicle state information including at least one of location information of the vehicle and following information: direction information of the vehicle, the vehicle Speed information, acceleration information of the vehicle, and geographic height information of the vehicle.
  • the vehicle terminal device when the vehicle terminal device reports the speed information or the acceleration information of the vehicle according to the indication of the configuration parameter information of the network side device, the frequent switching problem caused by the vehicle terminal quickly exiting the cell can be reduced; the reporting direction information is reported.
  • the network side device can determine the driving trajectory of the vehicle to perform the warning prompt between the vehicles, when the geographic height information is reported, the network side device can obtain more accurate position information of the vehicle.
  • a third aspect of the present invention provides a network side device including respective modules for performing the communication method of the first aspect
  • the present invention provides a vehicle terminal device, the vehicle terminal device including The various modules of the communication method of the second aspect are executed.
  • the present invention provides a communication system comprising the network side device according to the third aspect, and the vehicle terminal device according to the fourth aspect.
  • the present invention provides a network side device, including a receiver, a transmitter, at least one processor, and a memory, where the processor is configured to execute code in the memory, when the code is executed,
  • the processor implements the method of the first aspect.
  • the present invention provides a vehicle terminal device comprising a receiver, a transmitter, at least one processor, and a memory, the processor for executing code in the memory.
  • the processor implements the method of the second aspect when the code is executed.
  • the present invention provides a computer readable medium storing program code for execution by a network side device, the program code comprising instructions for performing aspects of the first aspect.
  • the present invention provides a computer readable medium storing program code for execution by a vehicle terminal device, the program code comprising instructions for performing the method of the second aspect.
  • FIG. 1 is an exemplary architectural diagram of a network for inter-vehicle communication in accordance with an embodiment of the present invention.
  • FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a communication method according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
  • Fig. 5 is a schematic structural diagram of a vehicle terminal device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a network side device according to an embodiment of the present invention.
  • Fig. 7 is a schematic configuration diagram of a vehicle terminal device according to an embodiment of the present invention.
  • Vehicle direct communication belongs to a communication method in V2V communication
  • V2V communication belongs to a communication method in Device to Device (D2D) communication.
  • the network side device 110 may configure various transmission parameters for data transmission for the vehicle terminal device 120 and the vehicle terminal device 130, and the vehicle terminal device 120 may serve as a data sender to directly perform VDC with the vehicle terminal device 130, of course.
  • the vehicle terminal device 120 may also perform Long Term Evolution (LTE) communication with the network side device, and the LTE communication may also be performed between the vehicle terminal device 120 and the vehicle terminal device 130 through the network side device.
  • LTE Long Term Evolution
  • the network side device in the embodiment of the present invention is a device that is deployed in a radio access network and provides a wireless communication function for the terminal device, and may be a base station (BS), and may be, for example, a macro base station including various forms. , micro base stations, relay stations, access points, etc.
  • BS base station
  • the name of a device having a base station function may be different, for example, in an LTE network, called an evolved NodeB (abbreviated as NB or eNodeB), in the first In the third generation 3G network, it is called Node B and so on.
  • the vehicle terminal device is an upper mobile communication device deployed on the vehicle.
  • the direct communication between the vehicle terminal devices through the wireless resources enables the direct communication of the vehicle, the communication between the vehicle terminal device and the network side device, and the communication between the vehicle and the network side device is realized.
  • the vehicle terminal device can be equated with the vehicle.
  • FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present invention. It should be understood that FIG. 2 illustrates steps or operations of the communication method, but these steps or operations are merely examples, and embodiments of the present invention may perform other operations or variations of the various operations in FIG. 2. Moreover, the various steps in FIG. 2 may be performed in a different order than that presented in FIG. 2, and it is possible that not all operations in FIG. 2 are to be performed.
  • the network side device 203 of FIG. 2 may be a base station, but is not limited to a base station.
  • the vehicle terminal device 201 in FIG. 2 may be the vehicle terminal device 120 in FIG. 1, and accordingly, the vehicle terminal device 202 It may be the vehicle terminal device 130 in FIG.
  • the vehicle terminal device 202 sends a resource scheduling request to the network side device 203 (such as a base station), and the network side device receives the resource scheduling request sent by the terminal device 202.
  • the network side device 203 such as a base station
  • the network side device when a certain vehicle terminal device needs to directly communicate with other vehicle terminal devices, it needs to send a resource scheduling request to the network side device. After receiving the resource scheduling request sent by the vehicle terminal device, the network side device knows that it is necessary to allocate a radio resource for the VDC to the vehicle. It should be noted that, for the sake of brevity, only the communication flow between one vehicle terminal device and the network side device and one vehicle terminal device is shown in FIG. 2, and the number of vehicle terminal devices shown in FIG. 2 should not constitute the embodiment of the present invention.
  • the limitation, that is, the vehicle terminal device 201 and the vehicle terminal device 202 may be any of a plurality of vehicle terminal devices that communicate with the network side device 203.
  • the vehicle terminal device 202 transmits vehicle status information (Vehicle Status Information) to the network side device 203, and the vehicle status information includes location information of the vehicle to which the vehicle terminal device 202 belongs.
  • vehicle status information includes location information of the vehicle to which the vehicle terminal device 202 belongs.
  • the network side device 203 receives the vehicle state information transmitted by the vehicle terminal device 202.
  • Step 220 and step 210 are in no particular order.
  • the resource scheduling request of the vehicle may be received first, and then the vehicle state information of the vehicle may be received.
  • the vehicle state information of the vehicle may be received first, and then the resource scheduling request of the vehicle may be received.
  • the network side device 203 After receiving the resource scheduling degree request sent by the vehicle terminal device 202, the network side device 203 allocates the wireless resource for the VDC to the vehicle terminal device 202 according to the location information in the received vehicle state information. After receiving the resource scheduling request sent by the vehicle terminal device 202, the network side device 203 may allocate the radio resource for the VDC to the vehicle according to the vehicle state information of the vehicle to which the vehicle terminal device is received and recorded, and may be based on The vehicle status information newly received from the vehicle terminal device thereafter allocates radio resources for the VDC to the vehicle terminal device.
  • the radio resources in the embodiments of the present invention include time domain resources and/or frequency resources.
  • the network side device 203 sends a control message to the vehicle terminal device 202, where the control message carries information of the radio resource for the VDC allocated by the network side device 203 for the vehicle terminal device 202.
  • the vehicle terminal device 202 receives the control message so that the radio resource for the VDC can be determined according to the information carried in the control message.
  • the vehicle terminal device 202 After determining the wireless resource according to the control message received from the network side device 203, the vehicle terminal device 202 performs direct communication with the vehicle terminal device 201 using the wireless resource.
  • the wireless resource for the VDC is allocated to the vehicle in combination with the location information of the vehicle.
  • the source can make full use of the position distribution of the vehicle and reasonably allocate frequency resources for the vehicle. For example, vehicles with a certain positional relationship can use the same time domain resources, thereby increasing the number of vehicles using the same resources, and ultimately improving the utilization of resources. .
  • the network side device broadcasts the resource pool configuration information of the current cell to the vehicle terminal device, where the resource pool configuration information may be carried in System Information Block (SIB).
  • SIB System Information Block
  • the vehicle terminal device obtains configuration information of the resource pool from the SIB, and the configuration information of the resource pool includes parameters such as a resource pool period.
  • RRC radio resource control
  • the vehicle terminal device can notify the network side device of its own capability. Specifically, the vehicle can be identified by using bits of certain data. Whether the terminal device supports vehicle status information reporting and support VDC.
  • the 2bit can be used to indicate whether the vehicle terminal device supports status information reporting.
  • One possible indication manner is: “11” indicates that the vehicle terminal device supports vehicle status information reporting and supports VDC; “10” indicates that the vehicle terminal device supports vehicle status information. Reported but does not support VDC; “00” indicates that the vehicle terminal device does not support vehicle status information reporting.
  • the vehicle status information sent by the vehicle to the network side device is sent by the vehicle terminal device according to a certain format or content requirement.
  • the format or content requirement of the vehicle status information may be a static agreement between the vehicle terminal device and the network side device, or may be dynamically configured by the network side device according to specific requirements, and generate configuration parameter information, and send the information to the vehicle.
  • a terminal device to indicate a composition content or format of vehicle state information that the vehicle terminal device should transmit to the network side device.
  • the allocation method in FIG. 2 may further include S310.
  • S310 the same reference numerals in FIG. 3 as those in FIG. 2 denote the same meanings, and are not described herein again.
  • the network side device 203 sends configuration parameter information to the vehicle terminal device 202, where the configuration parameter information is used to indicate the content of the vehicle state information that the vehicle terminal device 202 needs to send to the network side device 203, or a format that the content should satisfy.
  • the vehicle terminal device 202 may perform S220 according to the configuration parameter information.
  • the network side device 203 may transmit configuration parameter information to the vehicle terminal device 202 through signaling such as Media Access Control (MAC) signaling or RRC signaling.
  • signaling such as Media Access Control (MAC) signaling or RRC signaling.
  • the configuration parameter information is used to indicate that the vehicle state information transmitted by the vehicle terminal device to the network side device includes location information of the vehicle.
  • the vehicle terminal device follows the configuration parameter information.
  • the network side device transmits the vehicle state information including the location information of the belonging vehicle, so that the network side device can allocate the wireless resources for the VDC to the vehicle according to the location information of the vehicle, thereby improving the utilization of the wireless resources.
  • the location information of the vehicle may include the longitude and dimension of the vehicle, and the longitude and dimensions may include two parts, a sign bit and a value, respectively.
  • the range of longitude may be (-180, 180) degrees, or may be (0, 360) degrees, and the range of dimensions may be (-90, 90) degrees.
  • Vehicles can obtain longitude and latitude information through the Global Positioning System (GPS).
  • GPS Global Positioning System
  • Longitude and dimension can be expressed in two formats, one in unit degree, the specific format can be "value 1. value 2", such as -35.2 degrees means 0 longitude westward 35.2 degrees; the other is "degree”
  • the mode of "minutes:seconds” indicates that the specific format may be a format of "value 3: value 4: value 5", such as -21:34:12, indicating that 0 longitude is 21 degrees 34 minutes and 12 seconds west.
  • the longitude and dimension are expressed in the format of "degree: minute: second"
  • the longitude and dimension can occupy 20 bits respectively, wherein 1 bit represents the symbol, 7 bit represents the value of the degree, 6 bit represents the value of the minute, and 6 bit represents the value of the second.
  • the position of the vehicle may be represented by using a relative position between the absolute current position information of the vehicle and the absolute position when the position information is reported to the network side device last time. Since the coverage of the cell is determinable, the maximum position difference between the two positions of the moving vehicle in the coverage of the cell can also be determined, that is, the relative position of the vehicle in the vehicle state information can be determined according to the maximum position difference. Number of digits.
  • the network side device can determine the maximum number of bytes that the vehicle terminal device should send the vehicle state information according to the coverage of the cell.
  • the maximum number of bytes of the vehicle state information is determined according to the coverage of the cell, which not only ensures the accuracy of the vehicle state information, but also can reasonably use the message carrying the vehicle state information to improve resource utilization.
  • the longitude and the dimension when the longitude and the dimension are expressed in the format of "degree: minute: second", if the coverage of the cell is 1 degree, the longitude and dimension of the vehicle may not be expressed, and only minutes and seconds are indicated.
  • the longitude and the dimension can occupy 16 bits respectively, wherein 1 bit represents a symbol, 6 bit represents a value of a minute, and 6 bit represents a value of a second, wherein 3 bits are reserved.
  • the vehicle status information may further include speed information of the vehicle.
  • the network side device can judge whether the vehicle is in the high speed running state or the low speed running state according to the speed information of the vehicle, and then can dispatch the vehicle in the high speed running state as a competitive resource. The problem of frequent cell handover caused by the rapid exit of the vehicle is reduced.
  • a possible implementation manner of the vehicle terminal device transmitting the speed information to the network side device is that, within a speed range, the speed in the speed range can be divided into different speeds according to a certain granularity. For example, if the maximum speed is 765 km/h, if the speed granularity is 3, the speed within 765 km/h can be divided into 256 speed points (ie 0 to 255). Accordingly, a 1-byte unsigned number can be used to indicate 256 index values, and each index value is multiplied by the velocity granularity to obtain a corresponding velocity value. For example, the speed according to the 5th speed point is 15 km/h.
  • the network side device may send a speed granularity information to the vehicle terminal device, and then the vehicle terminal device may determine an index value according to the speed of the vehicle according to the speed of the vehicle, and send the index value to the network side device in the vehicle state information.
  • the network side device receives the index value, the speed of the vehicle can be calculated according to the index value and the speed granularity.
  • the vehicle status information may further include direction information of the vehicle.
  • the network side device can predict the travel route of the vehicle according to the direction information of the vehicle, so that an alert prompt between the vehicles can be performed.
  • a possible implementation manner of the vehicle terminal device transmitting the speed information to the network side device is: based on the north, if the true north direction can be represented by 0, the angular range of the current driving direction of the vehicle can be represented (-180, 180). . That is, from south to west, the angle to the north is negative (-180, 0), and the range from north to east to south is positive (0, 180).
  • the direction represents the granularity L, where L is greater than one.
  • Another possible implementation manner of the vehicle terminal device transmitting the speed information to the network side device is: based on the north, if the north direction can be represented by 0, the angular range of the current driving direction of the vehicle can be represented (0, 360). . That is, from north to east, from east to south, from south to west, and further north to the angle range (0,360).
  • the angle range is (-180, 180)
  • 8 bits can be used to indicate the direction of the vehicle. Among them, 1 bit represents a symbol, and 7 bits represents 0 to 127.
  • the directional particle size can then be set to 1.5 degrees.
  • the corresponding direction value can be determined according to the direction granularity of 1.5 degrees and the index values of 0 to 127. For example, the index 0 indicates that the direction is the true north direction, 3 indicates that the north is the reference to the east at an angle of 4.5 degrees, and 100 indicates that the reference is 150 degrees to the east.
  • the network side device can carry the direction granularity in the configuration parameter information, and then the vehicle can determine an index according to the direction granularity and the driving direction of the direction, and the index is carried in the vehicle status information and sent to the network side device, and the network side device According to the index and direction granularity can be determined Out of the direction of the vehicle.
  • the configuration parameter information sent by the network side device to the vehicle terminal device may also be used to indicate a period in which the vehicle terminal device sends the vehicle state information to the network side device.
  • the vehicle terminal device may send the associated vehicle state information to the network side device according to the period.
  • the vehicle terminal device may also transmit its own vehicle status information to the network side device in advance when the period has not expired.
  • the vehicle terminal device periodically transmits its own vehicle state information to the network side device, so that the network side device can periodically update the vehicle state information of the vehicle, so that the vehicle can be allocated wireless resources according to the latest vehicle state information of the vehicle.
  • the configuration parameter information sent by the network side device to the vehicle terminal device may also be used to indicate that the location information in the vehicle state information sent by the vehicle terminal device may further include geographic height information of the vehicle, such as altitude information.
  • geographic height information of the vehicle such as altitude information.
  • the vehicle height information of the vehicle is included in the vehicle state information transmitted by the vehicle terminal device to the network side device. After the network side device acquires the geographic information of the vehicle, the location of the vehicle can be determined more accurately.
  • the vehicle terminal device may constitute a MAC data unit (PDU) to be transmitted through a Media Access Control (MAC) control unit (Control Elements, CE).
  • the physical uplink shared channel (PUSCH) is transmitted to the network side device.
  • the MAC CE can be combined with the Buffer Status Reporting (BSR) to form a MAC PDU.
  • BSR Buffer Status Reporting
  • the MAC PDU can also be combined with the uplink data in the LTE.
  • the MAC PDU can also be formed separately.
  • the network side device when the network side device allocates radio resources for the VDC to the vehicle according to the location information of the vehicle, a possible specific implementation manner is: the network side device can allocate the same time-frequency resource to the vehicle with a relatively long distance. In this way, resources can be fully utilized, and the effects of half-duplex and near-far effects can be eliminated.
  • the resource scheduling request sent by the vehicle terminal device to the network side device may include information that the vehicle needs to perform the service of the VDC.
  • the LTE protocol does not specify the corresponding Quality of Service (QoS) for D2D, and only the corresponding interface is specified.
  • the VDC requires QoS guarantee.
  • the specific QoS parameters may include the Vehicle QoS Class Identifier (VQCI), Allocation and Retention Priority (ARP), and the maximum bit rate of the message transmission (Maximum Bit Rate, MBR) and so on.
  • VQCI Vehicle QoS Class Identifier
  • ARP Allocation and Retention Priority
  • MBR Maximum Bit Rate
  • VQCI includes Message Size, Priority, Packet Generation Frequency, Latency, Example Service, and Packet Error Loss Rate (PELR). Wait.
  • PLR Packet Error Loss Rate
  • the service of the vehicle can be divided into a VDC service type and an LTE service type.
  • V2V communication a large number of communication between vehicles is satisfied, and strict delay requirements are required, and the QoS of the VDC service needs to be guaranteed.
  • LTE services or VDC services there may be LTE services or VDC services.
  • LTE emergency service such as emergency call voice
  • VDC emergency service such as event-triggered emergency service
  • VDC periodic service such as periodic message
  • the vehicle can be divided into two priority queues according to the service type: a priority queue of the VDC service and a priority queue of the LTE service. If the LTE service and the VDC service are included in the cell, the two services share the LTE control channel resources for radio resource communication, such as the physical downlink control channel (PDCCH) or the enhanced physical downlink control. Enhanced Physical Downlink Control Channel (EPDCCH).
  • PDCCH physical downlink control channel
  • EPDCCH Enhanced Physical Downlink Control Channel
  • a vehicle When a vehicle has both LTE services and VDC services, it can be classified according to service types, so that scheduling is performed according to different service type priorities.
  • the services of all vehicles are classified into emergency service queues and common service queues by type.
  • SA scheduling control
  • the time of generating the message of each vehicle is obtained, and the service in the emergency service queue is successively decremented according to the time of the message generation to form a priority queue of the emergency service.
  • the ordinary service queue is sorted according to the time when the message is generated from far to near, and then sequentially sorted to form a priority queue of the common service.
  • a control message can be sent to the vehicles corresponding to the services, that is, the information of the wireless resources is transmitted to the vehicle terminal devices of the vehicles.
  • the network side device can allocate wireless resources to the vehicle terminal device and send control messages in a variety of ways. One is to not transmit vehicle status information, and directly transmit a PDCCH control message to the vehicle terminal device according to a distributed method.
  • the specific implementation manner is as follows: the network side device roots in each SA period According to the order in which the vehicle terminal equipment requests resources (that is, according to the order in the foregoing service queue), the radio resource allocation of the VDC is performed, and then the PDCCH control message is sent to the vehicle terminal equipment to inform the vehicle terminal equipment of the radio resource information. That is, the policy is first allocated first, thereby saving the transmission delay of the VDC packet.
  • the network side device performs radio resource allocation of the VDC according to the order in which the three vehicle terminal devices request scheduling resources, and sends a corresponding PDCCH control message.
  • the network side device first updates the vehicle state information in a resource scheduling period, and then centrally allocates VDC radio resources to all the vehicle terminal devices by using multiplexing technology or partitioning (Zone) technology, so that Vehicles in different locations may use the same video resource, and then send the PDCCH control message to the vehicle terminal device in a centralized or distributed manner, so that the PDCCH control message can be fully utilized, and the number of vehicle terminal devices to be scheduled in the resource pool is increased. Save packet delay in VDC.
  • the centralized manner of sending the control message refers to: completing the vehicle state information update in a resource scheduling period including N downlink subframes, and then performing the Mth to Nth downlink subframes in the scheduling period to the vehicle terminal device.
  • the PDCCH control message is sent to save the packet transmission delay in the VDC.
  • the vehicle state information update of the vehicle corresponding to the service queue is completed in a resource scheduling period, and then the PDCCH control is sent in the Mth to the Nth downlink subframes in the resource scheduling period according to the number of the vehicle terminal devices. Message. For example, there are fewer scenes on the highway.
  • the network side device may send a control message to the vehicle terminal device in the Nth downlink subframe, that is, send a control message to the vehicle terminal device in the last downlink subframe in the scheduling period, so that the scheduling delay may be saved.
  • resource scheduling is performed for a larger number of vehicle terminal devices.
  • the distributed mode sending control message refers to: completing the vehicle state information update in a resource scheduling period, and then distributing the PDCCH control message distributed in the next resource scheduling period to increase the number of vehicles in the resource pool scheduling.
  • the vehicle state information update of the vehicle corresponding to the service queue is completed in a resource scheduling period, and then the PDCCH control message of each vehicle is sequentially sent by using the downlink subframe according to the priority of the traffic in the queue in the next resource scheduling period. For example, there are many scenes where vehicles are distributed in cities.
  • the service priority queue may also be sorted by using the vehicle state location information to form a priority queue sorted according to the location.
  • a timer may be set for each vehicle.
  • the timing of the timer may be set to 10 seconds by default, and may be modified when the timing is set. If the vehicle state information of the vehicle is not reported within the time range, the vehicle state information is invalid, and the traffic of the vehicle is directly placed behind the sorting queue.
  • the communication method of the embodiment of the present invention is described above with reference to FIG. 2 and FIG. 3.
  • the network side device and the vehicle terminal device according to the embodiment of the present invention are described below with reference to FIG. 4 to FIG.
  • FIG. 4 is a schematic structural diagram of a network side device 400 according to an embodiment of the present invention. It should be understood that the structure shown in FIG. 4 is only an example, and the network side device of the embodiment of the present invention may further include other modules or units, or include modules similar to those of the respective modules in FIG. 4, or not including FIG. 4. All modules in .
  • the network side device 400 includes a receiving module 410, an allocating module 420, and a transmitting module 430.
  • the modules of the network side device 400 may be physically separated modules or logically separated modules, which is not limited by the present invention.
  • the receiving module 410 is configured to receive a resource scheduling request sent by the at least one vehicle terminal device, where the resource scheduling request is used to request the network side device to allocate a vehicle direct communication VDC for the vehicle terminal device corresponding to the resource scheduling request.
  • Wireless resources
  • the receiving module 410 is further configured to receive vehicle state information sent by the at least one vehicle terminal device, where the vehicle state information includes location information of a vehicle to which the vehicle terminal device belongs.
  • the allocating module 420 is configured to allocate, for the at least one vehicle terminal device, a radio resource for the VDC according to the vehicle state information.
  • the sending module 430 is configured to send a control message to the at least one vehicle terminal device, where the control message carries information about a radio resource used by the vehicle terminal device corresponding to the control message for the VDC.
  • the network side device acquires vehicle state information of the vehicle, and then allocates a wireless resource for the VDC to the vehicle terminal device according to the location information of the vehicle carried in the vehicle state information. Therefore, the wireless resources can be reasonably utilized to improve the utilization of resources.
  • the allocating module 420 is specifically configured to: in the at least one vehicle terminal device, according to location information of the vehicle to which the at least one vehicle terminal device belongs Different vehicle terminal devices are assigned the same radio resources for the VDC.
  • the wireless resource is allocated to the vehicle terminal device according to the location information of the vehicle, for example, according to the location information of the vehicle, and the wireless resource is allocated to the vehicle terminal device by using a multiplexing technology or a ZONE technology, so that the location is different.
  • the vehicle terminal device of the location vehicle can use the same radio resource (or time-frequency resource), thereby achieving different resource utilization and eliminating the effects of the near-far effect.
  • the sending module 430 is specifically configured to: determine, according to location information of the vehicle to which the at least one vehicle terminal device belongs, a sequence of sending the control message to the at least one vehicle terminal device And transmitting the control message to the at least one vehicle terminal device in the stated order.
  • the sequence of sending the control message by the network side device to the vehicle terminal device may be determined according to the position information of the vehicle according to the position of the vehicle, and the control message may be sent according to the sequence, thereby reducing the use.
  • the receiving module 410 is specifically configured to: receive the vehicle state information sent by the at least one vehicle terminal device in a first scheduling period of the resource pool; the sending module 430 is specifically configured to: Transmitting, by the Mth to the Nth downlink subframes in the first scheduling period, a control message to the at least one vehicle terminal device, where the control message is carried in a physical downlink control channel PDCCH, in the first scheduling period Includes N downlink subframes, 1 ⁇ M ⁇ N.
  • the network side device first acquires vehicle state information of the vehicle in the same resource scheduling period, allocates VDC radio resources according to the vehicle state information, and then sends a control message in the last NM subframes to notify the vehicle terminal device.
  • the radio resource information of the VDC can save the scheduling delay of the VDC radio resource.
  • the receiving module 410 is specifically configured to: send a control message to the at least one vehicle terminal device in an Nth downlink subframe in a first scheduling period of the resource pool, so that the scheduling of saving VDC radio resources may be saved.
  • Time delay can also be used for resource scheduling of more vehicle terminal equipment.
  • the receiving module 410 is specifically configured to: receive the vehicle state information sent by the at least one vehicle terminal device in a first scheduling period of the resource pool; the sending module 430 is specifically configured to: The next scheduling period of the first scheduling period sends a control message to the at least one vehicle terminal device, where the control message is carried on the physical downlink control channel PDCCH.
  • the vehicle state information of the vehicle is acquired in the last resource scheduling period, Then, the VDC radio resource is allocated according to the vehicle state information, and then the control message is sent to the vehicle terminal device in the next resource scheduling period, so that the number of the vehicle terminal devices that can schedule the VDC radio resource can be increased.
  • the receiving module 410 is specifically configured to: receive, by using the at least one vehicle terminal device, a MAC that is sent by using the physical uplink shared channel (PUSCH) and carried in a medium access control MAC protocol data unit PDU. Vehicle status information in the control unit CE.
  • PUSCH physical uplink shared channel
  • PDU medium access control MAC protocol data unit
  • the vehicle terminal device forms a MAC PDU by means of a MAC CE, and is carried on the PUSCH to report to the network side device.
  • the modification of the existing protocol is relatively small, the vehicle status information can be reported flexibly, independently and accurately. And can also shorten the reporting delay.
  • the sending module 430 is further configured to: send configuration parameter information to the at least one vehicle terminal device, where the configuration parameter information is used to indicate a vehicle status sent by the at least one vehicle terminal device
  • the information needs to include the location information of the vehicle to which the vehicle terminal device belongs; wherein the receiving module 410 is specifically configured to: receive a vehicle state that is sent by each of the at least one vehicle terminal device according to the configuration parameter information.
  • Information, the vehicle status information includes location information of a vehicle to which the vehicle terminal device belongs.
  • the network side device sends configuration parameter information indicating the content of the vehicle state information to the vehicle terminal device, and then the vehicle terminal device can report the vehicle state information of the vehicle to the network side device according to the parameter configured by the network side device. In this way, the vehicle terminal device can flexibly report the state information of the vehicle according to the needs of the network side device.
  • the configuration parameter information is further used to indicate a period in which the at least one vehicle terminal device sends the vehicle state information, where the receiving module 410 is specifically configured to: receive the at least one vehicle terminal.
  • the vehicle terminal device can report the state information of the vehicle to the network vehicle device according to the period indicated in the configuration parameter sent by the network side device, so that the vehicle state information recorded on the network side device can be updated in time to make the network side
  • the device can more accurately allocate VDC radio resources to the vehicle terminal equipment based on the latest vehicle status information.
  • the configuration parameter information is further used to indicate a maximum number of bytes of vehicle state information that is sent by the at least one vehicle terminal device, where the receiving module 410 is specifically configured to: receive the Vehicle state information transmitted by the at least one vehicle terminal device according to the configuration parameter information, the vehicle state information including a location letter of a vehicle to which the vehicle terminal device belongs The number of bytes of the vehicle status information is less than or equal to the maximum number of bytes.
  • the network side device indicates the maximum number of bytes of the reported vehicle state information for the vehicle terminal device, and then the vehicle terminal device can report the vehicle state information according to the maximum number of bytes, thereby preventing the vehicle terminal device from transmitting more than the maximum. Loss of information caused by the number of bytes of vehicle status information.
  • the network side device further includes a determining module, configured to determine the maximum number of bytes according to a cell coverage of the network side device.
  • the maximum number of bytes of the vehicle state information is flexibly determined according to the coverage of the cell, and the resource carrying the vehicle state information can be reasonably utilized to improve the utilization rate of the resource carrying the vehicle state information.
  • the configuration parameter information is further used to indicate at least one of the vehicle state information that needs to include direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and altitude information of the vehicle.
  • the receiving module 410 is specifically configured to: receive the vehicle state information that is sent by the at least one vehicle terminal device according to the configuration parameter information, where the vehicle state information includes a location of a vehicle to which the vehicle terminal device belongs At least one of information and information of: direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and geographic height information of the vehicle.
  • the vehicle terminal device when the vehicle terminal device reports the speed information or the acceleration information of the vehicle according to the indication of the configuration parameter information of the network side device, the frequent switching problem caused by the vehicle terminal quickly exiting the cell can be reduced; when the direction information is reported, The network side device can determine the driving trajectory of the vehicle to perform an alert prompt between the vehicles; when the geographic height information is reported, the network side device can obtain more accurate location information of the vehicle.
  • FIG. 5 is a schematic configuration diagram of a vehicle terminal device 500 according to an embodiment of the present invention. It should be understood that the structure shown in FIG. 5 is only an example, and the vehicle terminal device of the embodiment of the present invention may further include other modules or units, or include modules similar to those of the respective modules in FIG. 5, or not including FIG. 5. All modules in .
  • the vehicle terminal device 500 includes a transmitting module 510 and a receiving module 520.
  • the modules of the vehicle terminal device 500 may be physically separated modules or logically separated modules, which is not limited by the present invention.
  • the sending module 510 is configured to send vehicle state information to the network side device, where the vehicle state information includes location information of the vehicle to which the vehicle terminal device belongs.
  • the sending module 510 is further configured to send a resource scheduling request to the network side device, where the resource scheduling request is used to request the network side device to allocate radio resource information for the vehicle direct communication VDC to the vehicle.
  • the receiving module 520 is configured to receive a control message sent by the network side device, where the control message carries the wireless resource information.
  • the vehicle terminal device reports the vehicle state information of the vehicle to the network side device, so that the network side device can allocate the wireless resource for the VDC to the vehicle terminal device according to the location information of the vehicle carried by the vehicle state information. Therefore, the wireless resources can be reasonably utilized to improve the utilization of resources.
  • the sending module 510 is specifically configured to: send, by using a MAC control unit CE in a medium access control MAC protocol data unit PDU on a physical uplink shared channel PUSCH, to the network side device. Vehicle status information.
  • the vehicle terminal device forms a MAC PDU by means of a MAC CE, and is carried on the PUSCH to report to the network side device.
  • the modification of the existing protocol is relatively small, the vehicle status information can be reported flexibly, independently and accurately. And can also shorten the reporting delay.
  • the receiving module 520 is further configured to: receive configuration parameter information sent by the network side device, where the configuration parameter information is used to indicate that the vehicle status information sent by the vehicle terminal device needs to include The location information of the vehicle to which the vehicle terminal device belongs; wherein the sending module 510 is specifically configured to: send the vehicle state information to the network side device according to the configuration parameter information, where the vehicle state information includes The location information of the vehicle to which the vehicle terminal device belongs is described.
  • the vehicle terminal device can report the vehicle state information of the vehicle to the network side device according to the parameter configured by the network side device. In this way, the vehicle terminal device can flexibly report the state information of the vehicle according to the needs of the network side device.
  • the configuration parameter information is further used to indicate a period in which the vehicle terminal device sends the vehicle state information, where the sending module 510 is specifically configured to: according to the period, according to the The configuration parameter information is sent to the network side device, where the vehicle state information includes location information of a vehicle to which the vehicle terminal device belongs.
  • the vehicle terminal device can report the state information of the vehicle to the network vehicle device according to the period indicated in the configuration parameter sent by the network side device, so that the vehicle state information recorded on the network side device can be updated in time to make the network side
  • the device can be based on the latest vehicle status information.
  • the sending module 510 is specifically configured to: when the emergency occurs in the vehicle, send the vehicle state information to the network side device according to the configuration parameter information, where the vehicle The status information includes location information of the vehicle to which the vehicle terminal device belongs.
  • the vehicle terminal device can report the state information of the vehicle when the emergency event is sent in the vehicle, so that the emergency information can be Report the status information of the vehicle in a more timely manner.
  • the configuration parameter information is further used to indicate a maximum number of bytes of the vehicle state information that is sent by the vehicle terminal device, where the sending module 510 is specifically configured to: according to the configuration parameter The information transmits vehicle state information to the network side device, the vehicle state information including location information of the vehicle to which the vehicle terminal device belongs, and the number of bytes of the vehicle state information is less than or equal to the maximum number of bytes.
  • the vehicle terminal device can report the vehicle state information according to the maximum number of bytes configured by the network side device, so that the vehicle terminal device can avoid the loss of information caused by the vehicle state information exceeding the maximum number of bytes.
  • the receiving module 520 is specifically configured to: receive a physical downlink control channel PDCCH control message sent by the network side device, where the PDCCH control message carries a vehicle to which the vehicle terminal device belongs Radio resource information of the VDC.
  • the configuration parameter information is further used to indicate that the vehicle state information needs to include direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and the vehicle. At least one of the geographic height information, wherein the sending module 510 is specifically configured to: send vehicle state information to the network side device according to the configuration parameter information, where the vehicle state information includes location information of the vehicle And at least one of the following information: direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and geographic height information of the vehicle.
  • the vehicle terminal device when the vehicle terminal device reports the speed information or the acceleration information of the vehicle according to the indication of the configuration parameter information of the network side device, the frequent switching problem caused by the vehicle terminal quickly exiting the cell can be reduced; when the direction information is reported, The network side device can determine the driving trajectory of the vehicle to perform an alert prompt between the vehicles; when the geographic height information is reported, the network side device can obtain more accurate location information of the vehicle.
  • FIG. 6 is a schematic structural diagram of a network side device 600 according to an embodiment of the present invention. It should be understood that Figure 6 The network side device 600 is capable of performing the various steps performed by the network side device in FIGS. 2 and 3, and the network side device 600 includes the memory 610, the processor 620, the receiver 630, and the transmitter 640.
  • the memory 610 is configured to store a program.
  • the receiver 630 is configured to receive a resource scheduling request sent by the at least one vehicle terminal device, where the resource scheduling request is used to request the network side device to allocate a vehicle direct communication VDC for the vehicle terminal device corresponding to the resource scheduling request.
  • Wireless resources
  • the receiver 630 is further configured to receive vehicle state information sent by the at least one vehicle terminal device, where the vehicle state information includes location information of a vehicle to which the vehicle terminal device belongs.
  • the processor 620 is configured to allocate, for the at least one vehicle terminal device, a radio resource for the VDC according to the vehicle state information.
  • the transmitter 640 is configured to send a control message to the at least one vehicle terminal device, where the control message carries information about a radio resource used by the vehicle terminal device for the VDC corresponding to the control message.
  • the network side device acquires vehicle state information of the vehicle, and then allocates a wireless resource for the VDC to the vehicle terminal device according to the location information of the vehicle carried in the vehicle state information. Therefore, the wireless resources can be reasonably utilized to improve the utilization of resources.
  • the processor 620 is specifically configured to: assign, according to location information of the vehicle to which the at least one vehicle terminal device belongs, different vehicle terminal devices in the at least one vehicle terminal device Radio resource for VDC.
  • the wireless resource is allocated to the vehicle terminal device according to the location information of the vehicle, for example, according to the location information of the vehicle, and the wireless resource is allocated to the vehicle terminal device by using a multiplexing technology or a ZONE technology, so that the location is different.
  • the vehicle terminal device of the location vehicle can use the same radio resource (or time-frequency resource), thereby achieving different resource utilization and eliminating the effects of the near-far effect.
  • the transmitter 640 is specifically configured to: determine, according to location information of the vehicle to which the at least one vehicle terminal device belongs, a sequence of sending the control message to the at least one vehicle terminal device And transmitting the control message to the at least one vehicle terminal device in the stated order.
  • the sequence of sending the control message by the network side device to the vehicle terminal device may be determined according to the position information of the vehicle according to the position of the vehicle, and the control message may be sent according to the sequence, thereby reducing the use.
  • the receiver 630 is specifically configured to: receive the vehicle state information sent by the at least one vehicle terminal device in a first scheduling period of the resource pool; the sending module 430 is specifically configured to: Transmitting, by the Mth to the Nth downlink subframes in the first scheduling period, a control message to the at least one vehicle terminal device, where the control message is carried in a physical downlink control channel PDCCH, in the first scheduling period Includes N downlink subframes, 1 ⁇ M ⁇ N.
  • the network side device first acquires vehicle state information of the vehicle in the same resource scheduling period, allocates VDC radio resources according to the vehicle state information, and then sends a control message in the last NM downlink subframes to notify the vehicle.
  • the radio resource information of the terminal device VDC can save the scheduling delay of the VDC radio resource.
  • the receiver 630 is specifically configured to: send a control message to the at least one vehicle terminal device in an Nth downlink subframe in a first scheduling period of the resource pool, so that the scheduling of the VDC radio resource may be saved.
  • Time delay can also be used for resource scheduling of more vehicle terminal equipment.
  • the receiver 630 is specifically configured to: receive the vehicle state information sent by the at least one vehicle terminal device in a first scheduling period of the resource pool; the transmitter 640 is specifically configured to: The next scheduling period of the first scheduling period sends a control message to the at least one vehicle terminal device, where the control message is carried on the physical downlink control channel PDCCH.
  • the vehicle state information of the vehicle is acquired in the last resource scheduling period, then the VDC radio resource is allocated according to the vehicle state information, and then the control message is sent to the vehicle terminal device in the next resource scheduling period, thereby increasing the schedulable VDC wireless.
  • the number of vehicle terminal equipment for the resource is increased.
  • the receiver 630 is specifically configured to: receive, by the at least one vehicle terminal device, a MAC that is sent by using the physical uplink shared channel (PUSCH) and carried in a medium access control MAC protocol data unit PDU. Vehicle status information in the control unit CE.
  • PUSCH physical uplink shared channel
  • PDU medium access control MAC protocol data unit
  • the vehicle terminal device forms a MAC PDU by means of a MAC CE, and is carried on the PUSCH to report to the network side device.
  • the modification of the existing protocol is relatively small, the vehicle status information can be reported flexibly, independently and accurately. And can also shorten the reporting delay.
  • the transmitter 640 is further configured to: send configuration parameter information to the at least one vehicle terminal device, where the configuration parameter information is used to indicate a vehicle status sent by the at least one vehicle terminal device
  • the information needs to include the location information of the vehicle to which the vehicle terminal device belongs; wherein the receiver 630 is specifically configured to: receive a vehicle state that is sent by each of the at least one vehicle terminal device according to the configuration parameter information.
  • Information, the car The vehicle status information includes location information of the vehicle to which the vehicle terminal device belongs.
  • the network side device sends configuration parameter information indicating the content of the vehicle state information to the vehicle terminal device, and then the vehicle terminal device can report the vehicle state information of the vehicle to the network side device according to the parameter configured by the network side device. In this way, the vehicle terminal device can flexibly report the state information of the vehicle according to the needs of the network side device.
  • the configuration parameter information is further used to indicate a period in which the at least one vehicle terminal device sends the vehicle state information, where the receiver 630 is specifically configured to: receive the at least one vehicle terminal.
  • the vehicle terminal device can report the state information of the vehicle to the network vehicle device according to the period indicated in the configuration parameter sent by the network side device, so that the vehicle state information recorded on the network side device can be updated in time to make the network side
  • the device can more accurately allocate VDC radio resources to the vehicle terminal equipment based on the latest vehicle status information.
  • the configuration parameter information is further used to indicate a maximum number of bytes of vehicle state information sent by the at least one vehicle terminal device
  • the receiver 630 is specifically configured to: receive the Vehicle state information transmitted by the at least one vehicle terminal device according to the configuration parameter information, the vehicle state information includes location information of a vehicle to which the vehicle terminal device belongs, and the number of bytes of the vehicle state information is less than or equal to the maximum The number of bytes.
  • the network side device indicates the maximum number of bytes of the reported vehicle state information for the vehicle terminal device, and then the vehicle terminal device can report the vehicle state information according to the maximum number of bytes, thereby preventing the vehicle terminal device from transmitting more than the maximum. Loss of information caused by the number of bytes of vehicle status information.
  • the processor 620 is further configured to determine the maximum number of bytes according to a cell coverage of the network side device.
  • the maximum number of bytes of the vehicle state information is flexibly determined according to the coverage of the cell, and the resource carrying the vehicle state information can be reasonably utilized to improve the utilization rate of the resource carrying the vehicle state information.
  • the configuration parameter information is further used to indicate at least one of the vehicle state information that needs to include direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and altitude information of the vehicle.
  • the receiver 630 is specifically configured to: receive the vehicle state information that is sent by the at least one vehicle terminal device according to the configuration parameter information, where The vehicle state information includes at least one of position information of the vehicle to which the vehicle terminal device belongs and information of: direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and the vehicle Geographical height information.
  • the vehicle terminal device when the vehicle terminal device reports the speed information or the acceleration information of the vehicle according to the indication of the configuration parameter information of the network side device, the frequent switching problem caused by the vehicle terminal quickly exiting the cell can be reduced; when the direction information is reported, The network side device can determine the driving trajectory of the vehicle to perform an alert prompt between the vehicles; when the geographic height information is reported, the network side device can obtain more accurate location information of the vehicle.
  • FIG. 7 is a schematic configuration diagram of a vehicle terminal device 700 according to an embodiment of the present invention. It should be understood that the vehicle terminal device 700 of FIG. 7 is capable of performing the various steps performed by the vehicle terminal device of FIGS. 2 and 3, and the vehicle terminal device 700 includes a memory 710, a processor 720, a receiver 730, and a transmitter 740.
  • the memory 710 is configured to store a program.
  • the processor 720 is configured to execute a program stored in the memory 710, and the receiver 730 and the transmitter 740 are implemented to implement the program.
  • the transmitter 740 is configured to send vehicle state information to the network side device, where the vehicle state information includes location information of the vehicle to which the vehicle terminal device belongs.
  • the transmitter 740 is further configured to send a resource scheduling request to the network side device, where the resource scheduling request is used to request the network side device to allocate radio resource information for the vehicle direct communication VDC to the vehicle.
  • the receiver 730 is configured to receive a control message sent by the network side device, where the control message carries the radio resource information.
  • the vehicle terminal device reports the vehicle state information of the vehicle to the network side device, so that the network side device can allocate the wireless resource for the VDC to the vehicle terminal device according to the location information of the vehicle carried by the vehicle state information. Therefore, the wireless resources can be reasonably utilized to improve the utilization of resources.
  • the transmitter 740 is specifically configured to: send, by using a MAC control unit CE in a medium access control MAC protocol data unit PDU on a physical uplink shared channel PUSCH, to the network side device. Vehicle status information.
  • the vehicle terminal device forms a MAC PDU by means of a MAC CE, and the bearer is reported on the PUSCH to the network side device, and when the modification of the existing protocol is relatively small, Report vehicle status information flexibly, independently and accurately, and reduce reporting delays.
  • the receiver 730 is further configured to: receive configuration parameter information sent by the network side device, where the configuration parameter information is used to indicate that the vehicle status information sent by the vehicle terminal device needs to include The location information of the vehicle to which the vehicle terminal device belongs; wherein the transmitter 740 is specifically configured to: send the vehicle state information to the network side device according to the configuration parameter information, where the vehicle state information includes The location information of the vehicle to which the vehicle terminal device belongs is described.
  • the vehicle terminal device can report the vehicle state information of the vehicle to the network side device according to the parameter configured by the network side device. In this way, the vehicle terminal device can flexibly report the state information of the vehicle according to the needs of the network side device.
  • the configuration parameter information is further used to indicate a period in which the vehicle terminal device sends the vehicle state information, where the transmitter 740 is specifically configured to: according to the period, according to the The configuration parameter information is sent to the network side device, where the vehicle state information includes location information of a vehicle to which the vehicle terminal device belongs.
  • the vehicle terminal device can report the state information of the vehicle to the network vehicle device according to the period indicated in the configuration parameter sent by the network side device, so that the vehicle state information recorded on the network side device can be updated in time to make the network side
  • the device can more accurately allocate VDC radio resources to the vehicle terminal equipment based on the latest vehicle status information.
  • the transmitter 740 is specifically configured to: when the emergency occurs in the vehicle, send the vehicle state information to the network side device according to the configuration parameter information, where the vehicle The status information includes location information of the vehicle to which the vehicle terminal device belongs.
  • the vehicle terminal device can report the state information of the vehicle when the emergency event is sent in the vehicle, so that the emergency information can be Report the status information of the vehicle in a more timely manner.
  • the configuration parameter information is further used to indicate a maximum number of bytes of vehicle state information that is sent by the vehicle terminal device, where the transmitter 740 is specifically configured to: according to the configuration parameter The information transmits vehicle state information to the network side device, the vehicle state information including location information of the vehicle to which the vehicle terminal device belongs, and the number of bytes of the vehicle state information is less than or equal to the maximum number of bytes.
  • the vehicle terminal device can report the vehicle state information according to the maximum number of bytes configured by the network side device, so that the vehicle terminal device can be prevented from transmitting the vehicle exceeding the maximum number of bytes. Loss of information caused by status information.
  • the receiver 730 is specifically configured to: receive a physical downlink control channel PDCCH control message sent by the network side device, where the PDCCH control message carries a vehicle to which the vehicle terminal device belongs Radio resource information of the VDC.
  • the configuration parameter information is further used to indicate that the vehicle state information needs to include direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and the vehicle. At least one of the geographic height information; the transmitter 740 is specifically configured to: send vehicle state information to the network side device according to the configuration parameter information, where the vehicle state information includes location information of the vehicle And at least one of the following information: direction information of the vehicle, speed information of the vehicle, acceleration information of the vehicle, and geographic height information of the vehicle.
  • the vehicle terminal device when the vehicle terminal device reports the speed information or the acceleration information of the vehicle according to the indication of the configuration parameter information of the network side device, the frequent switching problem caused by the vehicle terminal quickly exiting the cell can be reduced; when the direction information is reported, The network side device can determine the driving trajectory of the vehicle to perform an alert prompt between the vehicles; when the geographic height information is reported, the network side device can obtain more accurate location information of the vehicle.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including
  • the instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

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

Abstract

La présente invention concerne un procédé de communication, un dispositif côté réseau et un dispositif terminal de véhicule. Dans un procédé de communication, un dispositif côté réseau reçoit une demande de planification de ressources envoyée par au moins un dispositif terminal de véhicule, la demande de planification de ressources étant utilisée pour demander au dispositif côté réseau d'attribuer une ressource sans fil pour un VDC au dispositif terminal de véhicule, correspondant à la requête de planification de ressource ; le dispositif côté réseau reçoit des informations d'état de véhicule envoyées par ledit dispositif terminal de véhicule, les informations d'état de véhicule comprenant des informations d'emplacement du véhicule correspondant aux informations d'état de véhicule ; le dispositif côté réseau attribue, conformément aux informations d'état du véhicule, la ressource sans fil pour le VDC au dispositif terminal de véhicule ; et le dispositif côté réseau envoie un message de commande au dispositif terminal de véhicule, le message de commande portant des informations sur la ressource sans fil du dispositif terminal de véhicule correspondant pour le VDC. Le procédé de communication de la présente invention peut améliorer l'utilisation de ressources sans fil pour le VDC et la fiabilité des performances du réseau.
PCT/CN2016/080502 2016-04-28 2016-04-28 Procédé de communication, dispositif côté réseau et dispositif terminal de véhicule WO2017185295A1 (fr)

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