WO2017049978A1 - 车联网中车载单元位置的同步方法、装置及设备 - Google Patents

车联网中车载单元位置的同步方法、装置及设备 Download PDF

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Publication number
WO2017049978A1
WO2017049978A1 PCT/CN2016/087247 CN2016087247W WO2017049978A1 WO 2017049978 A1 WO2017049978 A1 WO 2017049978A1 CN 2016087247 W CN2016087247 W CN 2016087247W WO 2017049978 A1 WO2017049978 A1 WO 2017049978A1
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Prior art keywords
rsu
obu
location information
lte
dsrc
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PCT/CN2016/087247
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English (en)
French (fr)
Inventor
许辉
马子江
卢忱
王亚英
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中兴通讯股份有限公司
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Publication of WO2017049978A1 publication Critical patent/WO2017049978A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/029—Location-based management or tracking services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the present invention relates to the field of communications, and in particular to a method, device and device for synchronizing the position of an onboard unit in a vehicle network.
  • the technologies to improve vehicle safety are mainly divided into passive safety technology and active safety technology.
  • Passive safety technology is used to protect people inside and outside the vehicle after accidents.
  • Active safety technology is used to prevent and reduce accidents in vehicles and avoid injuries.
  • Active safety technology is the focus of modern vehicle safety technology development. And trends.
  • the communication-based collision warning system realizes real-time information interaction between the vehicle, the vehicle and the roadside infrastructure by using advanced wireless communication technology and a new generation of information processing technology, and informs each other of the current state (including the position and speed of the vehicle). Acceleration, driving route) and learned road environment information, collaboratively aware of road hazard conditions, timely providing a variety of collision warning information to prevent road traffic safety accidents, and become a new way for countries to solve road traffic safety problems. .
  • V2X Vehicle to Everything
  • V2X Vehicle to Everything
  • V2V Vehicles and vehicles
  • V2V Vehicle to Pedestrian
  • V2I Vehicle to Infrastructure
  • FIG. 1 is a schematic diagram of sending traffic and scheduling information to a vehicle through a network information platform in the related art.
  • the Road Side Unit can receive vehicle requests, ensure that the vehicle accesses the Internet, and has the function of a gateway. In addition, it also has the functions of data calculation, storage, and forwarding.
  • V2R Vehicle to Road Side Unit
  • V2I Vehicle to Road Side Unit
  • the RSU can quickly receive detected vehicles, traffic lights and some road condition information, and process, reorder, and hoove the information to the vehicle.
  • connection with the RSU ensures that the vehicle can access the Internet reliably or in real time or download data stored by the RSU.
  • RSU has short-range coverage (hundreds of meters), cheap, easy to deploy and high data access speed (about l0mbps).
  • the research on RSU access in V2R needs to consider the following factors:
  • the vehicles are in high-speed moving state, usually the speed is 60-70m/s, the RSU coverage is 1000m, and the communication link between the car and the RSU is ideally maintained for 13s ⁇ 16s, so some files cannot be Complete upload/download within one RSU coverage:
  • RSU deployment has no unified management, RSU bandwidth, and limited channel resources, which leads to uneven distribution of RSU and unordered competition behavior of vehicles in order to obtain more bandwidth and channel resources. For example, when there is an overlapping area between multiple RSUs in an urban scenario, if the vehicle accesses the RSU policy improperly, the load between the RSUs will be unbalanced and the network resource utilization will be reduced.
  • DSRC Dedicated Short Range Communication
  • LTE Long Time Evolution
  • 802.11P 802.11P
  • MAC Medium Access Control
  • 1609 1609 is responsible for the upper specification.
  • LTE-based V2X technology has just begun to be discussed and there are no standards.
  • 3GPP is also studying the UE access selection problem when LTE and WLAN coexist: the purpose is to offload the EPS of the evolved packet system; there are two WLAN offload schemes in 3GPP: RAN-assisted WLAN interworking and access network discovery Access Network Selection and Traffic Steering Rules (ANDSF), the former belongs to the RAN solution, and the latter belongs to the NAS solution.
  • the base station sends the RAN assistance parameters to the UE through the SystemInformationBlockType17 or the RRCConnectionReconfiguration message, and the UE implements the selection of the access network by using the RAN assistance parameters and the ANDSF.
  • the network side performs paging according to the TA list of the UE, or in the LTE, the network side can know the location information of the UE, when the OBU is in the LTE When moving between the coverage area and the DSRC coverage area, the LTE Mobility Management Entity (MME)/ The eNB/RSU does not know the location of the OBU and cannot page to the OBU.
  • MME Mobility Management Entity
  • the embodiment of the invention provides a method, a device and a device for synchronizing the position of the on-board unit in the vehicle networking, so as to solve at least the problem that the DSRC RSU and the LTE RSU cannot be mutually paged to the OBU under the RSU coverage in the related art.
  • a method for synchronizing the position of the on-board unit OBU in the vehicle network includes: when the position information is updated by the on-board unit OBU, the first roadside unit RSU acquires the position information reported by the onboard unit OBU; The first RSU synchronizes the location information to the second RSU through the interface.
  • the first RSU and the second RSU each include one of the following: a Long Term Evolution Roadside Unit LTE RSU, and a Dedicated Short Range Communication Roadside Unit DSRC RSU.
  • the manner of the location update includes at least one of: an update of a tracking area of the OBU, a movement of the OBU between the LTE RSU and the DSRC RSU, the OBU by the LTE
  • the RSU covers the movement, periodic location update between the OBUs within the LTE RSU coverage, the OBUs between different BSSs or DSRC RSUs of different ESSs.
  • the acquiring the location information of the onboard unit OBU by the first roadside unit RSU includes: acquiring, by the LTE RSU, the OBU to report to the packet core network EPC network element and/or Or the location information of the application layer network element, and/or the location information directly reported by the OBU, where the location information is a tracking area identifier, or a base station eNB identifier, or a cell identifier, or a user equipment UE. logo.
  • the acquiring the location information of the onboard unit OBU by the first roadside unit RSU includes: the DSRC RSU acquiring the EBU reported to the packet core network EPC network element And the location information of the application layer network element, and/or the location information directly received by the OBU, where the location information is an identifier for identifying an RSU where the OBU is located, the OBU The RSU in which it is located is the DSRC RSU.
  • the identifier for identifying the RSU where the OBU is located includes at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, and a similar extended service set identifier HESSID.
  • the method further includes: the first RSU forwarding the received paging message of the second RSU to the OBU according to the location information.
  • the OBU is in an idle state before the location information is reported.
  • the interface is a direct or indirect interface.
  • a method for synchronizing the position of an on-board unit OBU in a vehicle network includes: when the position information is updated, the on-board unit OBU reports the position information to the first roadside unit RSU.
  • the location information is location information that is synchronized by the first roadside unit RSU to the second RSU; the OBU monitors and/or receives a paging message sent by the RSU according to the location information;
  • the first RSU and the second RSU each include one of the following: a Long Term Evolution Roadside Unit LTE RSU, and a Dedicated Short Range Communication Roadside Unit DSRC RSU.
  • the manner of the location update includes at least one of: an update of a tracking area of the OBU, a movement of the OBU between the LTE RSU and the DSRC RSU, the OBU by the LTE
  • the RSU covers the movement, periodic location update between the OBUs within the LTE RSU coverage, the OBUs between different BSSs or DSRC RSUs of different ESSs.
  • a synchronization device for an on-board unit OBU in a vehicle network which is applied to a first roadside unit RSU side, and includes: an acquisition module, configured to generate location information update at the onboard unit OBU. And acquiring location information of the onboard unit OBU; and the synchronization module is configured to synchronize the location information to the second RSU through a direct or indirect interface.
  • the first RSU and the second RSU each include one of the following: a Long Term Evolution Roadside Unit LTE RSU, and a Dedicated Short Range Communication Roadside Unit DSRC RSU.
  • the manner of the location update includes at least one of: an update of a tracking area of the OBU, a movement of the OBU between the LTE RSU and the DSRC RSU, the OBU by the LTE
  • the RSU covers the movement, periodic location update between the OBUs within the LTE RSU coverage, the OBUs between different BSSs or DSRC RSUs of different ESSs.
  • the acquiring module includes: a first acquiring unit, configured to acquire, by the OBU, the EPC network element and/or the application layer network element reported to the packet core network And the location information, and/or the location information directly reported by the OBU, where the location information is a tracking area identifier, or a base station eNB identifier, or a cell identifier, and a user equipment UE identifier.
  • the acquiring module includes: a second acquiring unit, configured to obtain the EBU reporting to the packet core network EPC network element and/or the application layer network element The location information, and/or the location information directly received by the OBU, where the location information is an identifier for identifying an RSU where the OBU is located, and the RSU where the OBU is located is the DSRC RSU .
  • the identifier for identifying the RSU where the OBU is located includes at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, and a similar extended service set identifier HESSID.
  • the device further includes: a forwarding module, configured to forward the received paging message of the second RSU to the OBU according to the location information.
  • a forwarding module configured to forward the received paging message of the second RSU to the OBU according to the location information.
  • the OBU is in an idle state before the location information is reported.
  • the interface is a direct or indirect interface.
  • a synchronization device for the position of an on-board unit OBU in a vehicle network which is applied to an OBU side of the vehicle-mounted unit, and includes: a reporting module configured to update the location information of the on-board unit OBU
  • the first roadside unit RSU reports the location information, wherein the location information is that the first roadside unit RSU synchronizes the location information with the second RSU; and the processing module is configured to monitor and/or receive the RSU a paging message sent according to the location information;
  • the first RSU and the second RSU each include one of the following: a Long Term Evolution Roadside Unit LTE RSU, and a Dedicated Short Range Communication Roadside Unit DSRC RSU.
  • the manner of the location update includes at least one of: an update of a tracking area of the OBU, a movement of the OBU between the LTE RSU and the DSRC RSU, the OBU by the LTE
  • the RSU covers the movement, periodic location update between the OBUs within the LTE RSU coverage, the OBUs between different BSSs or DSRC RSUs of different ESSs.
  • a synchronization device for an on-board unit OBU position in a vehicle network which is applied to a first roadside unit RSU side, and includes: a receiver configured to generate location information update at the onboard unit OBU. Obtaining location information of the onboard unit OBU; the processor is configured to synchronize the location information to the second RSU through a direct or indirect interface.
  • the device further includes: a transmitter, configured to forward the received paging message of the second RSU to the OBU according to the location information.
  • a transmitter configured to forward the received paging message of the second RSU to the OBU according to the location information.
  • the first roadside unit RSU acquires the location information reported by the onboard unit OBU from the network side entity; the first RSU synchronizes the position to the second RSU through the direct or indirect interface.
  • Information it can be seen that between different RSUs, when the location information of the OBU changes or just accesses the RSU, its location information is reported, and the location information can be synchronized between different RSUs, thereby solving the related art.
  • the problem that the DSRC RSU and the LTE RSU cannot page each other to the OBU under the RSU coverage improves the management effect of the OBU location information in the Internet of Vehicles.
  • FIG. 1 is a schematic diagram of sending traffic and scheduling information to a vehicle through a network information platform in the related art
  • FIG. 2 is a flow chart of a method for synchronizing the position of an onboard unit OBU in a vehicle network according to an embodiment of the present invention
  • FIG. 3 is a flow chart of a method for synchronizing the position of an on-board unit OBU in a car network according to an embodiment of the present invention
  • FIG. 4 is a structural block diagram of a synchronization device for an on-board unit OBU position in a vehicle network according to an embodiment of the present invention
  • FIG. 5 is a block diagram 1 of an optional structure of a device for managing the position of an on-board unit OBU in a vehicle network according to an embodiment of the present invention
  • FIG. 6 is a structural block diagram 2 of a device for managing a position of an on-board unit OBU in a vehicle network according to an embodiment of the present invention
  • FIG. 7 is a structural block diagram of a synchronization device for an on-board unit OBU position in a vehicle network according to an embodiment of the present invention.
  • FIG. 8 is a flow chart of a method for implementing OBU location management in accordance with an alternative embodiment of the present invention.
  • Figure 9 is a schematic illustration of a 1 in accordance with an alternate embodiment of the present invention.
  • FIG. 10 is a schematic illustration of an alternative embodiment 2 in accordance with the present invention.
  • Figure 11 is a schematic illustration of a 3 in accordance with an alternate embodiment of the present invention.
  • Figure 12 is a schematic illustration of a 5 in accordance with an alternate embodiment of the present invention.
  • Figure 13 is a schematic illustration of a 6 in accordance with an alternate embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for synchronizing the position of the onboard unit OBU in the vehicle network according to an embodiment of the present invention. The process includes the following steps:
  • Step S202 When the location information update occurs in the onboard unit OBU, the first roadside unit RSU acquires the location information reported by the onboard unit OBU from the network side entity;
  • Step S204 The first RSU synchronizes the location information to the second RSU through the interface.
  • the first roadside unit RSU acquires the location information reported by the onboard unit OBU from the network side entity; the first RSU passes through the direct or indirect interface.
  • the second RSU synchronizes the location information. It can be seen that when the location information of the OBU changes or just accesses the RSU, the location information of the OBU is reported between different RSUs, and the location information can be synchronized between different RSUs.
  • the problem that the OCR between the DSRC RSU and the LTE RSU cannot be mutually paged to the RSU coverage is solved in the related art, thereby improving the management effect of the OBU location information in the Internet of Vehicles.
  • the synchronization location information involved in this embodiment is that the OBU location information stored in the first RSU and the second RSU are consistent.
  • the first RSU and the second RSU involved in the embodiment include one of the following: a long term evolution roadside unit LTE RSU, and a dedicated short range communication roadside unit DSRC RSU.
  • the manner of location update involved in this embodiment includes at least one of the following: update of the tracking area of the OBU, movement of the OBU between the LTE RSU and the DSRC RSU, coverage of the OBU by the LTE RSU, and coverage of the LTE RSU, and the OBU Mobile, periodic location updates between DSRC RSUs of different BSSs or different ESSs.
  • the OBU reports location information only when the location is updated.
  • the location update includes: TA update of the OBU, coverage of the LTE RSU to the coverage, movement between the LTE RSU and the DSRC RSU, and DSRC RSU of different BSS or different ESSs. Inter-movement, periodic location update. If the OBU moves from within the RSU coverage to the outside of the coverage, the RSU.OBU is generally notified to be in the idle state at the inner edge of the RSU.
  • the manner of acquiring the location information of the onboard unit OBU for the first roadside unit RSU involved in this embodiment may be adopted.
  • the LTE RSU obtains the location information of the EPC network element and/or the application layer network element that the OBU reports to the packet core network, and/or receives the location information directly reported by the OBU, where the location information is the tracking area identifier, or the base station. eNB identity, or cell identity, or user equipment UE identity.
  • the location information involved in this embodiment is, and the network side entity may be a packet core network EPC network element and/or an application layer network element.
  • the manner in which the first roadside unit RSU acquires the location information of the onboard unit OBU may be implemented by: DSRC RSU Obtaining the location information of the EPC network element and/or the application layer network element reported by the OBU, and/or receiving the location information directly reported by the OBU, where the location information is used to identify the identifier of the RSU where the OBU is located, where the OBU is located.
  • the RSU is a DSRC RSU.
  • the identifier for identifying the RSU where the OBU is located includes at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, and a similar extended service set identifier HESSID.
  • the method in this embodiment further involves: the first RSU forwarding the received paging message of the second RSU to the OBU according to the location information.
  • the OBU involved in this embodiment is in an idle state.
  • the interface involved in this embodiment is a direct or indirect interface.
  • FIG. 3 is a flowchart of a method for synchronizing the position of an on-board unit OBU in a vehicle network according to an embodiment of the present invention. As shown in FIG. 3, the steps of the method include:
  • Step S302 When the location information is updated, the onboard unit OBU reports the location information to the first roadside unit RSU, wherein the location information is location information that the first roadside unit RSU synchronizes with the second RSU.
  • Step S304 The OBU monitors and/or receives the paging message sent by the RSU according to the location information.
  • the first RSU and the second RSU involved in this embodiment all include one of the following: a long-term evolution roadside unit LTE RSU, and a dedicated short-range communication roadside unit DSRC RSU.
  • the manner of location update involved in this embodiment includes at least one of the following: an update of the tracking area of the OBU, a movement of the OBU between the LTE RSU and the DSRC RSU, and an OBU coverage by the LTE RSU to the LTE RSU coverage.
  • the OBU moves and periodically updates between different BSSs or DSRC RSUs of different ESSs.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods of various embodiments of the present invention.
  • a device for synchronizing the position of the on-board unit OBU in the vehicle network is also provided, and the device is used to implement the above-mentioned embodiments and preferred embodiments, and the detailed description thereof has been omitted.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 4 is a structural block diagram of a synchronization device for a position of an on-vehicle unit OBU in a vehicle network according to an embodiment of the present invention.
  • the device is applied to a side of a first roadside unit RSU.
  • the device includes: an acquisition module 42.
  • the synchronization module 44 is coupled to the acquisition module 42 and configured to synchronize the location information to the second RSU through the direct or indirect interface.
  • first RSU and the second RSU involved in the apparatus embodiment include one of the following: a long term evolution roadside unit LTE RSU, and a dedicated short distance communication roadside unit DSRC RSU.
  • the manner of the location update includes at least one of the following: an update of the tracking area of the OBU, a movement of the OBU between the LTE RSU and the DSRC RSU, an OBU coverage by the LTE RSU, an LTE RSU coverage, and an OBU in different BSSs. Or movement, periodic location update between DSRC RSUs of different ESSs.
  • the acquiring module is further configured to acquire location information of the OBU from the mobility management entity MME and/or the RSU where the OBU is located, where the location information is a tracking area identifier, or the base station eNB Identification, or cell identity, or user equipment UE identity.
  • the acquiring module 42 is further configured to obtain location information that is reported by the OBU to the packet core network EPC network element and/or the application layer network element, and/or receive the OBU directly reported.
  • Location information where the location information is an identifier for identifying the RSU where the OBU is located, and the RSU where the OBU is located is a DSRC RSU.
  • the identifier for identifying the RSU where the OBU is located includes at least one of the following: a service set identifier SSID, a basic service set identifier BSSID, and a similar extended service set identifier HESSID.
  • the device further includes: a forwarding module 52 coupled to the synchronization module 44 and configured to be The received paging message of the second RSU is forwarded to the OBU according to the location information.
  • the interface involved in this embodiment may be a direct interface or an indirect interface.
  • FIG. 6 is a structural block diagram 2 of a device for managing an OCU position of an on-vehicle unit in a vehicle network according to an embodiment of the present invention.
  • the device is applied to an OBU side of an in-vehicle unit.
  • the device includes: a reporting module 62, configured to be When the location information of the onboard unit OBU is updated, the location information is reported to the first roadside unit RSU, wherein the location information is that the first roadside unit RSU synchronizes the location information with the second RSU; the processing module 64 is coupled to the reporting module 62. Set to monitor and/or receive paging messages sent by the RSU based on location information.
  • the first RSU and the second RSU involved in this embodiment each include one of the following: a long term evolution roadside unit LTE RSU, and a dedicated short range communication roadside unit DSRC RSU.
  • the manner of location update involved in this embodiment Including at least one of: update of tracking area of OBU, movement of OBU between LTE RSU and DSRC RSU, OBU coverage by LTE RSU to LTE RSU coverage, OBU between different BSS or DSRC RSU of different ESS Mobile, periodic location updates.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.
  • FIG. 7 is a structural block diagram of a synchronization device for an on-board unit OBU position in a vehicle network according to an embodiment of the present invention.
  • the device is applied to a first roadside unit RSU side, and the device includes: a receiver 72 configured to occur in an onboard unit OBU.
  • the processor 74 is coupled to the receiver 72 and configured to synchronize the location information to the second RSU through a direct or indirect interface;
  • the transmitter 76 is coupled to the processor 74.
  • the paging message set to receive the received second RSU is forwarded to the OBU according to the location information.
  • the optional embodiment provides a method for implementing OBU location management, including: LTE roadside unit RSU and DSRC RSU acquire OBU location information, and LTE roadside unit RSU and DSRC RSU exchange OBU location information through interface, LTE RSU or The DSRC RSU sends a paging message according to the location of the OBU, and the OBU sends a response message after receiving the paging message within the LTE RSU or DSRC RSU coverage.
  • FIG. 8 is a flowchart of a method for implementing OBU location management according to an optional embodiment of the present invention. As shown in FIG. 8, the steps of the method include:
  • step S801 the OBU reports the location information of the network.
  • the location information of the OBU is stored in the MME, the RSU that provides the coverage area for the DSRC is referred to as the DSRC RSU, and the RSU that provides the coverage area for the LTE is referred to as the LTE RSU.
  • the location of the OBU in the LTE (ie, the OBU is under the LTE coverage) generally uses the tracking area TA list; the location of the OBU in the DSRC (ie, the OBU under the DSRC coverage) generally uses the DSRC RSU identifier indication, and the DSRC RSU identifier includes the following At least one of the following: a Service Set Identifier (SSID), a Basic Service Set Identifier (BSSID), and a Homogenous Extended Service Set Identifier (HESSID).
  • SSID Service Set Identifier
  • BSSID Basic Service Set Identifier
  • HESSID Homogenous Extended Service Set Identifier
  • the location information of each OBU saved in the MME may be: TA list+SSID list
  • the location information of the OBU is obtained by the MME after the OBU reports the network, that is, the location information is reported to the network when the OBU is updated or initially attached.
  • the network involved in the optional embodiment may be : RSU and/or MME where the OBU is located.
  • the UE location information on the MME includes: TA list, SSID/BSSID/HESSID list;
  • the UE location information on the eNB or the RSU includes: a cell ID, an SSID/BSSID/HESSID list;
  • Step S802 the RSU acquires location information of the OBU.
  • the onboard unit OBU is equivalent to the user equipment UE, and the OBU is in an idle state, that is, the OBU resides in the cell, but does not establish an RRC connection with the base station. If the OBU is in the DSRC coverage area, the idle state means that the OBU can only receive the information sent by the RSU and cannot send information to the RSU. If the OBU can receive information sent by the RSU or send information to the RSU, the OBU is not idle. For example, the OBU is connected.
  • the RSU includes: an LTE RSU and/or a DSRC RSU, where the LTE RSU is an RSU capable base station eNB in LTE.
  • the LTE RSU obtains the location information of the OBU through the mobility management entity MME.
  • the location information generally refers to the tracking area TA of the OBU.
  • the DSRC RSU obtains the location information of the OBU according to the prior art. For example, when the OBU communicates with the DSRC RSU, the DSRC RSU saves the OBU.
  • the location information of the OBU in the DSRC is generally indicated by the identifier of the DSRC RSU, and the DSRC RSU identifier includes at least one of the following: SSID, BSSID, HESSID.
  • the location information of the OBU is obtained by the OBU reporting network side, that is, when the OBU is updated or initially attached, the location information is reported to the RSU and/or the MME.
  • Step S803 the location information of the OBU is exchanged between the RSUs.
  • an interface between the RSUs an interface between the LTE RSUs (such as the X2 port), an interface between the LTE RSU and the DSRC RSU, and an interface between the DSRC RSUs.
  • This location information is passed through the interface between the RSUs. There are two cases: 1) the OBU is located in the DSRC coverage, the DSRC RSU sends the OBU location information to the DSRC RSU and/or the LTE RSU with the interface nearby; 2) the OBU is located in the LTE RSU coverage, and the LTE RSU has the DSRC with the interface nearby The RSU and/or LTE RSU sends the location information of the OBU.
  • the interaction of the OBU location information between the RSUs generally occurs when the OBU is initially attached or updated, including: the OBU initiates attach/TAU in LTE, or the OBU enters DSRC coverage from LTE coverage, or the OBU covers from the DSRC. Entering the LTE coverage, or the OBU reselects the new RSU in the DSRC.
  • the OBU reports the location information to the RSUhe and/or the MME, and the location between the RSUs that received the reported location information. Information exchange.
  • Step S804 the LTE RSU sends a paging message.
  • the LTE RSU receives the paging message sent by the MME or the RSU itself needs to send a paging message, such as a system message update or an MT (Mobile Terminated) call.
  • a paging message such as a system message update or an MT (Mobile Terminated) call.
  • the LTE RSU determines that the target OBU is within the LTE RSU coverage area, the LTE RSU sends a paging message within the coverage area; if the LTE RSU determines that the target OBU is not within the LTE RSU coverage area or the target OBU is within the adjacent DSRC RSU coverage, then LTE The RSU first sends a paging message to the DSRC RSU, and the DSRC RSU that receives the paging message sends a paging message in the coverage area.
  • Step S805 the OBU receives the RSU to send a paging message.
  • the OBU detects the required paging message, and the required paging message refers to the paging message being associated with the OBU (such as system message update) or the presence of the OBU identifier in the paging message; if the required paging is detected; Message, then OBU enters one Steps to determine whether it is necessary to establish a connection with the RSU and send a paging response message. For example, for the system message update, the OBU does not need to send a paging response message.
  • the OBU For the MT paging, the OBU needs to establish a connection and send a paging response message; if the OBU is located After the DSRC is received, and the received paging message is sent by the LTE RSU, the DSRC RSU forwards the received paging response message to the LTE RSU through the interface after receiving the paging response message of the OBU.
  • FIG. 9 is a schematic diagram of an optional embodiment of the present invention.
  • the application scenario involved in this embodiment is: an interface between an eNB and a DSRC AP, and an IDLE OBU enters a DSRC coverage (leaving LTE coverage).
  • the OBU reports the information (such as the OBU ID, the original TAI list, the capability, etc.) to the DSRC AP
  • the DSRC AP notifies the eNB that the eNB updates the location information of the OBU through the MME (eg, adds the SSID/BSSID of the AP in the paging area of the OBU).
  • the MME eg, adds the SSID/BSSID of the AP in the paging area of the OBU.
  • HESSID the Home SBC address
  • the OBU When the Idle OBU returns to the LTE coverage, the OBU reports the OBU paging area (such as deleting the SSID/BSSID/HESSID).
  • FIG. 10 is a schematic diagram of a second embodiment of the present invention.
  • the application scenario of the present embodiment is: the DSRC AP accesses the EPC through S2a/S2b/S2c, and there is no direct connection between the eNB and the AP. interface.
  • the Idle OBU enters the DSRC coverage and reports the information to the AP.
  • the AP reports the OBU location to the P-GW through the AC/BAS.
  • the P-GW sends the OBU location information to the corresponding MME.
  • the OBU When the Idle OBU returns to the LTE coverage, the OBU reports the OBU paging area (such as deleting the SSID).
  • Idle OBU also performs periodic location update.
  • the Idle OBU adopts a cycle.
  • the sex/event triggers a location update and sends the updated location information to the relevant MME covered by the LTE.
  • the connected OBU enters the DSRC coverage and may also become an Idle (such as an LTE port inactive). Location update is also required.
  • FIG. 12 is a schematic diagram of a 5 according to an optional embodiment of the present invention.
  • the application scenario involved in this embodiment is: paging in LTE, no paging in DSRC, and in LTE, if If an Idle OBU needs to be queried, the MME searches for the TA list where the OBU is located, and sends a paging message on the TA list. If the OBU is located in the DSRC coverage, consider the following scenario: 1) Scenario 1, an interface exists between the eNB and the DSRC AP.
  • the MME sends a paging message to the eNB (the eNB that connects the DSRC AP), and the eNB forwards the paging message to the AP, and the AP broadcasts the paging message, and the OBU responds after receiving the message.
  • Scenario 2 The DSRC AP accesses the EPC through S2a/S2b/S2c, and there is no direct interface between the eNB and the AP.
  • the MME forwards the paging message to the P-GW, and the P-GW sends the paging message to the AC/BAS->AP through the S2a/b/c interface.
  • the AP broadcasts the paging message, and the OBU responds after receiving the message.
  • FIG. 13 is a schematic diagram of a preferred embodiment of the present invention.
  • the application scenario involved in this embodiment is: in the DSRC coverage, if the OBU is inactive, an LTE-like paging opportunity PO mode may be adopted. Monitor the page or put the paging indicator message in the Beacon message.
  • the invention provides a V2X OBU location management device, comprising:
  • a first receiver configured to receive the report information sent by the OBU and receive the OBU location information and/or the paging message sent by the neighboring RSU or the connected EPC;
  • a first transmitter configured to send a paging message to the OBU 60 and to send an OBU location information and/or a paging message to the neighboring RSU or the connected EPC;
  • the first processor is configured to determine to send a paging message and/or OBU location information by means of a local, or an adjacent RSU, or a connected EPC.
  • the above apparatus is an RSU in LTE and an RSU in DSRC, wherein the RSU in LTE includes: an eNB or a stationary UE.
  • the optional embodiment further provides a V2X OBU location management device, including:
  • a second receiver configured to receive a paging message sent by the RSU
  • a second transmitter configured to send location update information and a paging response message to the RSU
  • the second processor is configured to determine when to transmit location update information and whether to page the response message.
  • the foregoing apparatus is an OBU in the LTE or an OBU in the DSRC, where the OBU in the LTE is a UE or a mobile terminal in the E-UTRAN.
  • Embodiments of the present invention also provide a storage medium.
  • the foregoing storage medium may be configured to store program code for performing the following steps:
  • Step S1 The first roadside unit RSU acquires location information of the onboard unit OBU from the network side entity;
  • Step S2 The first RSU synchronizes the location information to the second RSU through a direct or indirect interface.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any specific combination of hardware and software.
  • the first roadside unit RSU acquires the location information reported by the onboard unit OBU from the network side entity; the first RSU synchronizes the position to the second RSU through the direct or indirect interface.
  • Information it can be seen that between different RSUs, when the location information of the OBU changes or just accesses the RSU, its location information is reported, and the location information can be synchronized between different RSUs, thereby solving the related art.
  • the problem that the DSRC RSU and the LTE RSU cannot page each other to the OBU under the RSU coverage improves the management effect of the OBU location information in the Internet of Vehicles.

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Abstract

本发明提供了一种车联网中车载单元(OBU)位置的管理同步方法、装置及设备，其中，该方法包括以下步骤：在OBU发生位置信息更新时，第一路边单元(RSU)获取OBU上报的位置信息(S202)；第一RSU通过接口向第二RSU同步位置信息(S204)。通过应用本发明，解决了相关技术中专用短距离通信(DSRC) RSU与LTE RSU之间不能互相寻呼到RSU覆盖下的OBU的问题，进而改进了车联网中对OBU位置信息的管理。

Description

车联网中车载单元位置的同步方法、装置及设备 技术领域
本发明涉及通信领域，具体而言，涉及一种车联网中车载单元位置的同步方法、装置及设备。
背景技术
随着经济社会高速发展，中国汽车保有量迅速增长，道路交通事故频繁发生，已成为近年来影响我国公众安全感的重要因素之一，道路交通安全问题已经成为影响社会和谐和改善民生的基本问题之一。中国迫切需要从技术、政策、教育等各方面改善交通安全，其中提升车辆安全设计是其中的重要组成部分。
提升车辆安全的技术主要分为被动安全技术和主动安全技术。被动安全技术用于在事故发生后，对车内、车外人员及物品的保护；主动安全技术用于防止和减少车辆发生事故，避免人员受到伤害；主动安全技术是现代车辆安全技术发展的重点和趋势。
基于通信的碰撞预警***，通过利用先进的无线通信技术和新一代信息处理技术，实现车与车、车与路侧基础设施间的实时信息交互，告知彼此目前的状态(包括车辆的位置、速度、加速度、行驶路径)及获知的道路环境信息，协作感知道路危险状况，及时提供多种碰撞预警信息，防止道路交通安全事故的发生，成为当前各国试图解决道路交通安全问题的一种新的思路。
车联网(Vehicle to Everything，简称为V2X)：是指通过装载在车辆上的传感器、车载终端及电子标签提供车辆信息，采用各种通信技术实现车辆与车辆(Vehicle to Vehicle，简称为V2V)、车与人(Vehicle to Pedestrian，简称为V2P)、车与基础设施(Vehicle to Infrastructure，简称为V2I)互连互通，并在信息网络平台上对信息进行提取、共享等有效利用，对车辆进行有效的管控和提供综合服务。图1为相关技术中通过网络信息平台向车辆发送交通、调度信息的示意图。
近年来随着新的移动通信技术的发展，国际上出现了使用LTE技术来解决基于车联网通信应用的研究。
路边通信单元(Road Side Unit，简称为RSU)可以接收车辆请求，保证车辆接入Internet，有网关的功能；此外，它也拥有数据运算、存储、转发的功能。
车辆与路边单元的通信(Vehicle to Road Side Unit，简称为V2R)，也可称为V2I，该V2R通信时的主要特点包括：
(1)RSU广播时，广播信息只发送给它覆盖范围内的所有车辆：
(2)RSU和车辆之间是单跳传输，防止多跳带来的包传递成功率低、网络吞吐量低等不利影响：
(3)RSU可以快速的接收探测到经过的车辆、红绿灯和一些路况信息，并把这些信息进行处理、重新排序、蹄选之后再发给车辆。
上述三个方面保证车辆经过RSU时，通过与RSU建立连接保证车辆可以可靠、实时的接入Internet或者下载RSU存储的数据。
RSU具有短程覆盖(数以百计米)、便宜、容易部署和高数据访问速度(大约l0mbps)的特点，对于V2R中RSU接入问题的研究还需要更深入的考虑以下几个因素：
1)车辆都处于高速移动状态，通常速度在60-70m/s之问，RSU的覆盖范围为1000米，车和RSU的通信链路在理想状态下维持13s～16s，因此某些文件不能在一个RSU覆盖范围内完成上传/下载：
2)RSU的部署没有统一管理、RSU带宽、信道资源有限，这就导致RSU的分布存在不均匀问题及车辆为了获得更多的带宽、信道资源而产生无序竞争行为。如城市场景下，多个RSU之间存在重叠区域时，车辆接入RSU策略不当时会导致RSU间负载不均衡，降低网络资源利用率。
目前有两种车联网实现技术：专用短距离通信(Dedicated Short Range Communication，简称为DSRC)和长期演进(Long Time Evolution，简称为LTE)，该DSRC基于IEEE802。11P和IEEE1609系列标准，802。11P负责物理层和媒体接入控制(MAC，Medium Access Control)技术，1609负责上层规范。基于LTE的V2X技术刚开始讨论，还没有标准。
目前3GPP也在研究LTE和WLAN共存时的UE接入选择问题：目的是为了对演进分组***EPS业务的分流offload；在3GPP中有两种WLAN offload方案：RAN-assisted WLAN interworking和接入网发现选择功能(Access Network Selection and Traffic Steering Rules，简称为ANDSF)，前者属于RAN解决方案，后者属于NAS解决方案。基站通过SystemInformationBlockType17或RRCConnectionReconfiguration消息将RAN assistance parameters发给UE，UE利用RAN assistance parameters和ANDSF实现对接入网的选择。
在对现有技术的研究和实践过程中，发现存在以下问题：在LTE中，网络侧根据UE的TA list进行寻呼，或者说在LTE中可以网络侧知道UE的位置信息，当OBU在LTE覆盖区域和DSRC覆盖区域之间移动时，由于DSRC RSU不在TA list中，则OBU处于DSRC RSU覆盖内(或LTE RSU覆盖)外时，LTE的移动管理实体(Mobility Management Entity，简称为MME)/eNB/RSU不知道OBU的位置，无法寻呼到OBU。
针对相关技术中的上述问题，目前尚不存在有效的解决方案。
发明内容
本发明实施例提供了一种车联网中车载单元位置的同步方法、装置及设备，以至少解决相关技术中DSRC RSU与LTE RSU之间不能相互寻呼到RSU覆盖下的OBU的问题。
根据本发明实施例的一个方面，提供了车联网中车载单元OBU位置的同步方法，包括：在车载单元OBU发生位置信息更新时，第一路边单元RSU获取车载单元OBU上报的位置信息；所述第一RSU通过接口向第二RSU同步所述位置信息。
可选地，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
可选地，所述位置更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
可选地，在第一RSU为所述LTE RSU时，所述第一路边单元RSU获取车载单元OBU的位置信息包括：所述LTE RSU获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为跟踪区域标识、或基站eNB标识、或小区标识、或用户设备UE标识。
可选地，在所述第一RSU为所述DSRC RSU时，所述第一路边单元RSU获取车载单元OBU的位置信息包括：所述DSRC RSU获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为用于标识所述OBU所在的RSU的标识，所述OBU所在的RSU为所述DSRC RSU。
可选地，所述用于标识所述OBU所在的RSU的标识包括以下至少之一：服务集标识SSID、基本服务集标识BSSID、同类扩展服务集标识HESSID。
可选地，所述方法还包括：所述第一RSU将接收到的所述第二RSU的寻呼消息依据所述位置信息转发到所述OBU。
可选地，在上报所述位置信息之前，所述OBU为空闲态。
可选地，所述接口为直接或间接接口。
根据本发明实施例的另一个方面，提供了一种车联网中车载单元OBU位置的同步方法，包括：车载单元OBU在发生位置信息更新时，向第一路边单元RSU上报所述位置信息，其中，所述位置信息为所述第一路边单元RSU向第二RSU同步的位置信息；所述OBU监测和/或接收所述RSU依据所述位置信息发送的寻呼消息；
可选地，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
可选地，所述位置更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
根据本发明实施例的再一个方面，提供了一种车联网中车载单元OBU位置的同步装置，应用于第一路边单元RSU侧，包括：获取模块，设置为在车载单元OBU发生位置信息更新时，获取车载单元OBU的位置信息；同步模块，设置为通过直接或间接接口向第二RSU同步所述位置信息。
可选地，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
可选地，所述位置更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
可选地，在第一RSU为所述LTE RSU时，所述获取模块包括：第一获取单元，设置为获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为跟踪区域标识、或基站eNB标识、或小区标识、用户设备UE标识。
可选地，在所述第一RSU为所述DSRC RSU时所述，获取模块包括：第二获取单元，设置为获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为用于标识所述OBU所在的RSU的标识，所述OBU所在的RSU为所述DSRC RSU。
可选地，所述用于标识所述OBU所在的RSU的标识包括以下至少之一：服务集标识SSID、基本服务集标识BSSID、同类扩展服务集标识HESSID。
可选地，所述装置还包括：转发模块，设置为将接收到的所述第二RSU的寻呼消息依据所述位置信息转发到所述OBU。
可选地，在上报所述位置信息之前，所述OBU为空闲态。
可选地，所述接口为直接或间接接口。
根据本发明实施例的又一个方面，提供了一种车联网中车载单元OBU位置的同步装置，应用于车载单元OBU侧，包括：上报模块，设置为在车载单元OBU发生位置信息更新时，向第一路边单元RSU上报所述位置信息，其中，所述位置信息为所述第一路边单元RSU向第二RSU同步所述位置信息；处理模块，设置为监测和/或接收所述RSU依据所述位置信息发送的寻呼消息；
可选地，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
可选地，所述位置更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
根据本发明实施例的再一个方面，提供了一种车联网中车载单元OBU位置的同步设备，应用于第一路边单元RSU侧，包括：接收器，设置为在车载单元OBU发生位置信息更新时，获取车载单元OBU的位置信息；处理器，设置为通过直接或间接接口向第二RSU同步所述位置信息。
可选地，所述设备还包括：发送器，设置为将接收到的所述第二RSU的寻呼消息依据所述位置信息转发到所述OBU。
通过本发明实施例，采用在车载单元OBU发生位置信息更新时，第一路边单元RSU从网络侧实体获取车载单元OBU上报的位置信息；第一RSU通过直接或间接接口向第二RSU同步位置信息，可见，在不同的RSU之间，在OBU的位置信息发生变化或刚接入RSU时都会上报自身的位置信息，而该位置信息可以在不同RSU之间进行同步，从而解决了相关技术中DSRC RSU与LTE RSU之间不能相互寻呼到RSU覆盖下的OBU的问题，进而提高了在车联网中对OBU位置信息的管理效果。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为相关技术中通过网络信息平台向车辆发送交通、调度信息的示意图；
图2是根据本发明实施例的车联网中车载单元OBU位置的同步方法的流程图；
图3是根据本发明实施例的车联网中车载单元OBU位置的同步方法的流程图；
图4是根据本发明实施例的车联网中车载单元OBU位置的同步装置的结构框图；
图5是根据本发明实施例的车联网中车载单元OBU位置的管理装置的可选结构框图一；
图6是根据本发明实施例的车联网中车载单元OBU位置的管理装置的结构框图二；
图7是根据本发明实施例的车联网中车载单元OBU位置的同步设备的结构框图；
图8是根据本发明可选实施例的实现OBU位置管理的方法流程图；
图9是根据本发明可选实施例的1的示意图；
图10是根据本发明可选实施例的2的示意图；
图11是根据本发明可选实施例的3的示意图；
图12是根据本发明可选实施例的5的示意图；
图13是根据本发明可选实施例的6的示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
在本实施例中提供了一种车联网中车载单元OBU位置的管理方法，图2是根据本发明实施例的车联网中车载单元OBU位置的同步方法的流程图，如图2所示，该流程包括如下步骤：
步骤S202：在车载单元OBU发生位置信息更新时，第一路边单元RSU从网络侧实体获取车载单元OBU上报的位置信息；
步骤S204：第一RSU通过接口向第二RSU同步位置信息。
通过本实施例的步骤S202和步骤S204，采用在车载单元OBU发生位置信息更新时，第一路边单元RSU从网络侧实体获取车载单元OBU上报的位置信息；第一RSU通过直接或间接接口向第二RSU同步位置信息，可见，在不同的RSU之间，在OBU的位置信息发生变化或刚接入RSU时都会上报自身的位置信息，而该位置信息可以在不同RSU之间进行同步，从而解决了相关技术中DSRC RSU与LTE RSU之间不能相互寻呼到RSU覆盖下的OBU的问题，进而提高了在车联网中对OBU位置信息的管理效果。
需要说明的是，本实施例中涉及到的同步位置信息是指：第一RSU和第二RSU中保存的OBU位置信息保持一致。
对于本实施例中涉及到的该第一RSU和第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
本实施例中涉及到的位置更新的方式包括以下至少之一：OBU的跟踪区域的更新、OBU在LTE RSU和DSRC RSU之间的移动、OBU由LTE RSU覆盖外到LTE RSU覆盖内、OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
也就是说，OBU只有在位置更新时上报位置信息，位置更新包括：OBU的TA更新，LTE RSU覆盖外到覆盖内，LTE RSU和DSRC RSU之间的移动，不同BSS或不同ESS的DSRC RSU之间的移动，周期性位置更新。如果OBU从RSU覆盖内移动到覆盖外，一般在RSU内部边缘通知RSU.OBU为空闲态。
基于此，在本实施例的一个可选实施方式中，在第一RSU为LTE RSU时，对于本实施例中涉及到的第一路边单元RSU获取车载单元OBU的位置信息的方式，可以通过如下方式来实现：LTE RSU获取OBU上报到分组核心网EPC网元和/或应用层网元的位置信息，和/或接收OBU直接上报的位置信息，其中，位置信息为跟踪区域标识、或基站eNB标识、或小区标识、或用户设备UE标识。
也就是说，在该第一RSU为LTE RSU时，本实施例中涉及到的位置信息为，而该网络侧实体可以是分组核心网EPC网元和/或应用层网元。
而在本实施例的另一个可选实施方式中，在第一RSU为DSRC RSU时，该第一路边单元RSU获取车载单元OBU的位置信息的方式，可以通过如下方式来实现包括：DSRC RSU获取OBU上报到分组核心网EPC网元和/或应用层网元的位置信息，和/或接收OBU直接上报的位置信息，其中，位置信息为用于标识OBU所在的RSU的标识，OBU所在的RSU为DSRC RSU。
该用于标识OBU所在的RSU的标识包括以下至少之一：服务集标识SSID、基本服务集标识BSSID、同类扩展服务集标识HESSID。
此外，在本实施例的另一个可选实施例中，本实施例的方法还涉及到：第一RSU将接收到的第二RSU的寻呼消息依据位置信息转发到OBU。
需要说明的是，在上报位置信息之前，本实施例中涉及到的OBU为空闲态。此外，本实施例中涉及到的接口为直接或间接接口。
图3是根据本发明实施例的车联网中车载单元OBU位置的同步方法的流程图，如图3所示，该方法的步骤包括：
步骤S302：车载单元OBU在发生位置信息更新时，向第一路边单元RSU上报位置信息，其中，位置信息为第一路边单元RSU向第二RSU同步的位置信息。
步骤S304：OBU监测和/或接收RSU依据位置信息发送的寻呼消息。
需要说明的是，本实施例中涉及到的第一RSU和第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。基于此，本实施例中涉及到的位置更新的方式包括以下至少之一：OBU的跟踪区域的更新、OBU在LTE RSU和DSRC RSU之间的移动、OBU由LTE RSU覆盖外到LTE RSU覆盖内、OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例的方法。
在本实施例中还提供了一种车联网中车载单元OBU位置的同步装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图4是根据本发明实施例的车联网中车载单元OBU位置的同步装置的结构框图，该装置应用于第一路边单元RSU侧，如图4所示，该装置包括：获取模块42，设置为在车载单元OBU发生位置信息更新时，获取车载单元OBU的位置信息，其中，其中，位置信息为OBU从第二RSU的覆盖范围内移动到第一RSU的覆盖范围内时或OBU在初始接入第一RSU时，向网络侧实体上报的位置信息；同步模块44，与获取模块42耦合连接，设置为通过直接或间接接口向第二RSU同步位置信息。
需要说明的是，本装置实施例中涉及到的第一RSU和第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
需要说明的是该位置更新的方式包括以下至少之一：OBU的跟踪区域的更新、OBU在LTE RSU和DSRC RSU之间的移动、OBU由LTE RSU覆盖外到LTE RSU覆盖内、OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
可选地，在第一RSU为LTE RSU时，获取模块，还设置为从OBU所在的移动管理实体MME和/或RSU中获取OBU的位置信息，其中，位置信息为跟踪区域标识、或基站eNB标识、或小区标识、或用户设备UE标识。
可选地，在第一RSU为DSRC RSU时，该获取模块42，还设置为获取OBU上报到分组核心网EPC网元和/或应用层网元的位置信息，和/或接收OBU直接上报的位置信息，其中，位置信息为用于标识OBU所在的RSU的标识，OBU所在的RSU为DSRC RSU。该用于标识OBU所在的RSU的标识包括以下至少之一：服务集标识SSID、基本服务集标识BSSID、同类扩展服务集标识HESSID。
图5是根据本发明实施例的车联网中车载单元OBU位置的管理装置的可选结构框图一，如图5所示，装置还包括：转发模块52，与同步模块44耦合连接，设置为将接收到的第二RSU的寻呼消息依据位置信息转发到OBU。
对于本实施例中涉及到的接口可以为直接接口或间接接口。
图6是根据本发明实施例的车联网中车载单元OBU位置的管理装置的结构框图二，该装置应用于车载单元OBU侧，如图6所示，该装置包括：上报模块62，设置为在车载单元OBU发生位置信息更新时，向第一路边单元RSU上报位置信息，其中，位置信息为第一路边单元RSU向第二RSU同步位置信息；处理模块64，与上报模块62耦合连接，设置为监测和/或接收RSU依据位置信息发送的寻呼消息。
本实施例中涉及到的第一RSU和第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。基于此，本实施例中涉及到的位置更新的方式 包括以下至少之一：OBU的跟踪区域的更新、OBU在LTE RSU和DSRC RSU之间的移动、OBU由LTE RSU覆盖外到LTE RSU覆盖内、OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。
图7是根据本发明实施例的车联网中车载单元OBU位置的同步设备的结构框图，该设备应用于第一路边单元RSU侧，该设备包括：接收器72，设置为在车载单元OBU发生位置信息更新时，获取车载单元OBU的位置信息；处理器74，与接收器72耦合连接，设置为通过直接或间接接口向第二RSU同步位置信息；发送器76，与处理器74耦合连接，设置为将接收到的第二RSU的寻呼消息依据位置信息转发到OBU。
下面结合本发明的可选实施例对本发明进行举例说明；
本可选实施例提供了一种实现OBU位置管理的方法，包括：LTE路边单元RSU和DSRC RSU获取OBU位置信息，LTE路边单元RSU和DSRC RSU通过接***互OBU的位置信息，LTE RSU或DSRC RSU根据OBU的位置发送寻呼消息，OBU在LTE RSU或DSRC RSU覆盖内收到寻呼消息后发送响应信息。
图8是根据本发明可选实施例的实现OBU位置管理的方法流程图，如图8所示，该方法的步骤包括：
步骤S801，OBU上报网络其位置信息。
其中，该OBU的位置信息保存在MME中，为DSRC提供覆盖区域的RSU简称为DSRC RSU，为LTE提供覆盖区域的RSU简称为LTE RSU。
OBU在LTE中的位置(即：OBU在LTE覆盖下)一般采用跟踪区域TA list；OBU在DSRC中的位置(即：OBU在DSRC覆盖下)一般采用DSRC RSU的标识指示，DSRC RSU标识包括以下至少一种：服务集标识(Service Set Identifier，简称为SSID)，基本服务集标识(Basic Service Set Identifier，简称为BSSID)和同类扩展服务集标识(Homogenous Extended Service Set Identifier，简称为HESSID)，所以，MME中所保存的每个OBU的位置信息可以是：TA list+SSID list
需要说明的是：OBU的位置信息都是通过OBU上报网络后，MME获取并存储之，即OBU发生位置更新或初始附着时向网络上报位置信息，其中，本可选实施例中涉及网络可以是：OBU所在的RSU和/或MME。
MME上的UE位置信息包括：TA list，SSID/BSSID/HESSID list；
eNB或RSU上的UE位置信息包括：cell ID，SSID/BSSID/HESSID list；
步骤S802，RSU获取OBU的位置信息。
其中，车载单元OBU相当于用户设备UE，OBU处于空闲态，即OBU驻留在小区，但没有和基站建立RRC连接。如果OBU在DSRC覆盖区域内，则空闲态是指OBU只能接收RSU发送的信息而不能向RSU发送信息，如果OBU既可以接收RSU发送的信息也可以向RSU发送信息，则OBU不是空闲态，如OBU为连接态。
RSU包括：LTE RSU和/或DSRC RSU，其中LTE RSU为LTE中的具有RSU能力的基站eNB。
LTE RSU通过移动管理实体MME获取OBU的位置信息，位置信息一般是指OBU的跟踪区域TA；DSRC RSU根据现有技术获取OBU的位置信息，如当OBU与DSRC RSU进行通信时，DSRC RSU保存OBU的位置信息，OBU在DSRC中的位置一般采用DSRC RSU的标识指示，DSRC RSU标识包括以下至少一种：SSID、BSSID、HESSID。
需要说明的是：OBU的位置信息都是通过OBU上报网络侧获取，即OBU发生位置更新或初始附着时向所在的RSU和/或MME上报位置信息。
步骤S803，RSU之间交互OBU的位置信息。
其中，RSU之间存在接口：包括LTE RSU之间的接口(如X2口)，LTE RSU和DSRC RSU之间的接口，DSRC RSU之间的接口。
该位置信息通过RSU之间的接口传递。包括两种情况：1)OBU位于DSRC覆盖中，DSRC RSU向附近有接口的DSRC RSU和/或LTE RSU发送OBU的位置信息；2)OBU位于LTE RSU覆盖中，LTE RSU向附近有接口的DSRC RSU和/或LTE RSU发送OBU的位置信息。
需要指出的是：上述RSU之间OBU位置信息的交互一般发生在OBU初始附着或位置更新时，包括：OBU在LTE中发起attach/TAU，或者OBU从LTE覆盖进入DSRC覆盖，或者OBU从DSRC覆盖进入LTE覆盖，或者OBU在DSRC中重选到新的RSU，当上述任意一种情况发生时，OBU向所在的RSUhe和/或MME上报位置信息，收到上报的位置信息的RSU之间进行位置信息交互。
步骤S804，LTE RSU发送寻呼消息。
其中，LTE RSU收到MME发送的寻呼消息或者RSU自身需要发送寻呼消息，如***消息更新或收到MT(Mobile Terminated)呼叫。
如果LTE RSU确定目标OBU在LTE RSU覆盖区域内，则LTE RSU在覆盖区域内发送寻呼消息；如果LTE RSU确定目标OBU不在LTE RSU覆盖区域内或者目标OBU在临近的DSRC RSU覆盖内，则LTE RSU首先向DSRC RSU发送寻呼消息，收到寻呼消息的DSRC RSU在覆盖区域内发送寻呼消息。
步骤S805，OBU接收RSU发送寻呼消息。
其中，OBU检测所需的寻呼消息，所需的寻呼消息是指寻呼消息与OBU相关(如***消息更新)或者寻呼消息中有OBU的标识存在；如果检测到所需的寻呼消息，则OBU进一 步判断是否需要与RSU建立连接并发送寻呼响应消息，如对于***消息更新，OBU不需要发送寻呼响应消息，对于MT寻呼，则OBU需要建立连接并发送寻呼响应消息；如果OBU位于DSRC覆盖内，且收到的寻呼消息为LTE RSU发送，则DSRC RSU收到OBU的寻呼响应消息后通过接口向LTE RSU转发所收到的寻呼响应消息。
下面结合本可选实施例的具体实施例对本可选实施例进行详细的说明；
实施例1
图9是根据本发明可选实施例的1的示意图，如图9所示，本实施例涉及到的应用场景是：eNB和DSRC AP之间有接口，则IDLE OBU进入DSRC覆盖(离开LTE覆盖)时，OBU向DSRC AP上报信息(如OBU ID，原TAI list，能力等)，DSRC AP通知eNB，eNB通过MME更新OBU的位置信息(如在OBU的寻呼区域中增加AP的SSID/BSSID/HESSID)；
当Idle OBU返回LTE覆盖，同样的，OBU向eNB上报，则MME更新OBU的寻呼区域(如删除SSID/BSSID/HESSID)。
实施例2
图10是根据本发明可选实施例的2的示意图，如图10所示，本实施例涉及到的应用场景为：DSRC AP通过S2a/S2b/S2c接入EPC，eNB和AP之间没有直接接口。Idle OBU进入DSRC覆盖，向AP上报信息，AP通过AC/BAS上报OBU位置到P-GW，P-GW将OBU位置信息下发到相应的MME。
当Idle OBU返回LTE覆盖，同样的，OBU向eNB上报，则MME更新OBU的寻呼区域(如删除SSID)。
实施例3
图11是根据本发明可选实施例的3的示意图，如图11所示，本实施例涉及到的应用场景为：Idle OBU同样进行周期性位置更新，在DSRC内部移动时，Idle OBU采用周期性/事件触发位置更新，并将更新的位置信息发送到LTE覆盖的相关MME。
实施例4
connected OBU进入DSRC覆盖，同样可能成为Idle(如LTE端口inactive)，则也需要进行位置更新。
实施例5
图12是根据本发明可选实施例的5的示意图，如图12所示，本实施例涉及到的应用场景为：在LTE中才能寻呼，在DSRC中没有寻呼，在LTE中，如果需要寻呼某个Idle OBU，则通过MME查找OBU所在的TA list，在TA list发送寻呼消息；如果OBU位于DSRC覆盖，考虑以下场景：1)场景1，eNB和DSRC AP之间有接口，则MME发送寻呼消息到eNB(连接DSRC AP的eNB)，eNB向AP转发寻呼消息，AP广播寻呼消息，OBU收到后响应。2) 场景2，DSRC AP通过S2a/S2b/S2c接入EPC，eNB和AP之间没有直接接口。MME将寻呼消息递交P-GW，P-GW通过S2a/b/c接口发送到AC/BAS-〉AP，AP广播寻呼消息，OBU收到后响应。
实施例6
图13是根据本发明可选实施例的6的示意图，如图13所示，本实施例涉及到的应用场景为：在DSRC覆盖内，如果OBU处于inactive，可采用类似LTE的寻呼机会PO方式监听寻呼，或者将寻呼指示消息放在Beacon消息中。
本发明一种V2X OBU位置管理的装置，包括：
第一接收器，设置为接收OBU发送的上报信息以及接收相邻RSU或相连的EPC发送的OBU位置信息和/或寻呼消息；
第一发送器，设置为向OBU60发送寻呼消息以及向相邻RSU或相连的EPC发送OBU位置信息和/或寻呼消息；
第一处理器，设置为判断通过本地，或者相邻有接口的RSU，或者相连的EPC，发送寻呼消息和/或OBU位置信息。
上述装置为包括LTE中的RSU和DSRC中的RSU，其中LTE中的RSU包括：eNB或静止UE。
本可选实施例还提供了一种V2X OBU位置管理的装置，包括：
第二接收器，设置为接收RSU发送的寻呼消息，
第二发送器，设置为向RSU发送位置更新信息和寻呼响应消息，
第二处理器，设置为确定何时发送位置更新信息，以及是否寻呼响应消息。
上述装置为包括LTE中的OBU或DSRC中的OBU，其中LTE中的OBU为E-UTRAN中的UE或移动终端。
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：
步骤S1：第一路边单元RSU从网络侧实体获取车载单元OBU的位置信息；
步骤S2：第一RSU通过直接或间接接口向第二RSU同步位置信息。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例， 本实施例在此不再赘述。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
通过本发明实施例，采用在车载单元OBU发生位置信息更新时，第一路边单元RSU从网络侧实体获取车载单元OBU上报的位置信息；第一RSU通过直接或间接接口向第二RSU同步位置信息，可见，在不同的RSU之间，在OBU的位置信息发生变化或刚接入RSU时都会上报自身的位置信息，而该位置信息可以在不同RSU之间进行同步，从而解决了相关技术中DSRC RSU与LTE RSU之间不能相互寻呼到RSU覆盖下的OBU的问题，进而提高了在车联网中对OBU位置信息的管理效果。

Claims (26)

  1. 一种车联网中车载单元OBU位置的同步方法，包括：
    在车载单元OBU发生位置信息更新时，第一路边单元RSU获取车载单元OBU上报的位置信息；
    所述第一RSU通过接口向第二RSU同步所述位置信息。
  2. 根据权利要求1所述的方法，其中，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
  3. 根据权利要求2所述的方法，其中，所述位置信息更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
  4. 根据权利要求2所述的方法，其中，在第一RSU为所述LTE RSU时，所述第一路边单元RSU获取车载单元OBU的位置信息包括：
    所述LTE RSU获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为跟踪区域标识、或基站标识、或小区标识、或用户设备UE标识。
  5. 根据权利要求2所述的方法，其中，在所述第一RSU为所述DSRC RSU时，所述第一路边单元RSU获取车载单元OBU的位置信息包括：
    所述DSRC RSU获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为用于标识所述OBU所在的RSU的标识，所述OBU所在的RSU为所述DSRC RSU。
  6. 根据权利要求5所述的方法，其中，所述用于标识所述OBU所在的RSU的标识包括以下至少之一：服务集标识SSID、基本服务集标识BSSID、同类扩展服务集标识HESSID。
  7. 根据权利要求1至6任一项所述的方法，其中，所述方法还包括：
    所述第一RSU将接收到的所述第二RSU的寻呼消息依据所述位置信息转发到所述OBU。
  8. 根据权利要求1所述的方法，其中，在上报所述位置信息之前，所述OBU为空闲态。
  9. 根据权利要求1所述的方法，其中，所述接口为直接或间接接口。
  10. 一种车联网中车载单元OBU位置的同步方法，包括：
    车载单元OBU在发生位置信息更新时，向第一路边单元RSU上报所述位置信息，其中，所述位置信息为所述第一路边单元RSU向第二RSU同步的位置信息；
    所述OBU监测和/或接收所述RSU依据所述位置信息发送的寻呼消息。
  11. 根据权利要求10所述的方法，其中，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
  12. 根据权利要求11所述的方法，其中，所述位置更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
  13. 一种车联网中车载单元OBU位置的同步装置，应用于第一路边单元RSU侧，包括：
    获取模块，设置为在车载单元OBU发生位置信息更新时，获取车载单元OBU的位置信息；
    同步模块，设置为通过直接或间接接口向第二RSU同步所述位置信息。
  14. 根据权利要求13所述的装置，其中，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
  15. 根据权利要求13所述的装置，其中，所述位置更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
  16. 根据权利要求13所述的装置，其中，在第一RSU为所述LTE RSU时，所述获取模块包括：
    第一获取单元，设置为获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为跟踪区域标识、或基站标识、或小区标识、或用户设备UE标识。
  17. 根据权利要求13所述的装置，其中，在所述第一RSU为所述DSRC RSU时所述，获取模块包括：
    第二获取单元，设置为获取所述OBU上报到分组核心网EPC网元和/或应用层网元的所述位置信息，和/或接收所述OBU直接上报的所述位置信息，其中，所述位置信息为用于标识所述OBU所在的RSU的标识，所述OBU所在的RSU为所述DSRC RSU。
  18. 根据权利要求17所述的装置，其中，所述用于标识所述OBU所在的RSU的标识包括以下至少之一：服务集标识SSID、基本服务集标识BSSID、同类扩展服务集标识HESSID。
  19. 根据权利要求13至18任一项所述的装置，其中，所述装置还包括：
    转发模块，设置为将接收到的所述第二RSU的寻呼消息依据所述位置信息转发到所述OBU。
  20. 根据权利要求13所述的装置，其中，在上报所述位置信息之前，所述OBU为空闲态。
  21. 根据权利要求13所述的装置，其中，所述接口为直接或间接接口。
  22. 一种车联网中车载单元OBU位置的同步装置，应用于车载单元OBU侧，包括：
    上报模块，设置为在车载单元OBU发生位置信息更新时，向第一路边单元RSU上报所述位置信息，其中，所述位置信息为所述第一路边单元RSU向第二RSU同步所述位置信息；
    处理模块，设置为监测和/或接收所述RSU依据所述位置信息发送的寻呼消息。
  23. 根据权利要求22所述的装置，其中，所述第一RSU和所述第二RSU均包括以下之一：长期演进路边单元LTE RSU、专用短距离通信路边单元DSRC RSU。
  24. 根据权利要求23所述的装置，其中，所述位置更新的方式包括以下至少之一：所述OBU的跟踪区域的更新、所述OBU在所述LTE RSU和所述DSRC RSU之间的移动、所述OBU由所述LTE RSU覆盖外到所述LTE RSU覆盖内、所述OBU在不同BSS或不同ESS的DSRC RSU之间的移动、周期性位置更新。
  25. 一种车联网中车载单元OBU位置的同步设备，应用于第一路边单元RSU侧，包括：
    接收器，设置为在车载单元OBU发生位置信息更新时，获取车载单元OBU的位置信息；
    处理器，设置为通过直接或间接接口向第二RSU同步所述位置信息。
  26. 根据权利要求25所述的设备，其中，所述设备还包括：
    发送器，设置为将接收到的所述第二RSU的寻呼消息依据所述位置信息转发到所述OBU。
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CN113129635A (zh) * 2019-12-30 2021-07-16 厦门雅迅网络股份有限公司 一种车辆托管方法和***

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