WO2019101159A1 - 基于移动设备运动状态的基站切换方法和设备 - Google Patents
基于移动设备运动状态的基站切换方法和设备 Download PDFInfo
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- WO2019101159A1 WO2019101159A1 PCT/CN2018/117134 CN2018117134W WO2019101159A1 WO 2019101159 A1 WO2019101159 A1 WO 2019101159A1 CN 2018117134 W CN2018117134 W CN 2018117134W WO 2019101159 A1 WO2019101159 A1 WO 2019101159A1
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- 238000004364 calculation method Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
Definitions
- the Intelligent Transportation System aims to build a comprehensive, all-round, real-time, accurate and efficient integrated transportation management system by integrating advanced information, communication, sensing, control and computer technologies. .
- ITS can effectively use transportation facilities, reduce traffic load and environmental pollution, ensure traffic safety, and improve transportation efficiency. It is the future development direction of the transportation system and an important part of the Intelligent City.
- the main participants in ITS are road infrastructure, vehicles, management centers and users.
- the vehicles in the ITS are the main means of transportation and need to be in contact with other vehicles, road infrastructure, traffic management centers and users, also known as Vehicle to Everything (V2X).
- V2X Vehicle to Everything
- V2X When V2X is implemented based on a wireless communication network, such as LTE, 5G, etc., the vehicle as a mobile device will travel between the serving cells of each base station, so the base station needs to perform handover to ensure continuity of service for the vehicle.
- a wireless communication network such as LTE, 5G, etc.
- the base station handover is based on the base station signal strength received by the mobile device such as a mobile phone.
- the mobile station receives the signal strength of the serving base station that is lower than the signal strength of the other base station, the other base station serves as the next serving base station, and then the mobile device establishes a communication connection with the next serving base station. Finally, the service provided by the base station to the mobile device is handed over from the current serving base station to the next serving base station.
- the embodiments of the present invention provide a base station handover method and a device based on a mobile device motion state, which can start and perform a base station handover seamlessly and quickly at a more reasonable time, and meet the requirements of security assurance and efficiency improvement.
- a base station handover method based on a motion state of a mobile device includes:
- the mobile device After the mobile device maintains a first communication connection with the first base station and establishes a second communication connection with the second base station, when the duration decreases to a set threshold, initiation from the first base station Switching to the second base station.
- the threshold is based on assuming that the mobile device has established the second communication connection with the second base station, and is switched from the first base station to the Determining, by the second base station, a time setting required to complete the handover from the first base station to the second base station.
- the base station according to the current location and motion state of the mobile device predicts that the base station serving the mobile device is switched from the first base station to the second base station. Duration, including:
- the duration is determined according to a time required for the mobile device to reach the switching boundary according to the motion state from the position.
- the switching boundary is determined according to a strength of the first base station and a signal strength of the second base station; or the switching boundary is covered according to the first base station signal A cross section of the intersection of the surface of the space with the surface of the second base station signal covering the space is determined.
- the mobile device establishes the second communication connection with the second base station, including:
- the second communication connection is established when the mobile device enters the second base station signal coverage space.
- the base station signal coverage space is determined according to the location and signal strength of the base station.
- the initiating a handover from the first base station to the second base station includes:
- a base station instructing the first base station, the second base station, and/or the mobile device to provide service to the mobile device to switch from the first base station to the second base station.
- the completing the handover from the first base station to the second base station includes:
- the switching from the first base station to the second base station includes:
- the first base station hands over the service provided by the mobile device to the second base station.
- the next base station serving the mobile device is determined according to the current location and direction of the mobile device; or the next base station serving the mobile device is based on The base station currently serving the mobile device and the current direction determination of the mobile device.
- the base station currently serving the mobile device is determined according to a current location of the mobile device.
- the motion state includes any combination of direction, velocity, acceleration, and angular velocity.
- a base station switching device based on a motion state of a mobile device where the device includes:
- An obtaining module configured to acquire a current location and a motion state of the mobile device
- a prediction module configured to predict, according to a current location and a motion state of the mobile device, a time period from a current time to a base station serving the mobile device to complete handover from the first base station to the second base station, where the first base station For the base station currently serving the mobile device, the second base station is the next base station serving the mobile device;
- a switching module configured to: after the mobile device maintains a first communication connection with the first base station, and establishes a second communication connection with the second base station, when the duration decreases to a set threshold, The first base station switches to the second base station.
- the device further includes:
- a setting module configured to switch from the first base station to the second base station according to the assumption that the mobile device has established the second communication connection with the second base station, to The threshold is set by the time required to complete the handover from the first base station to the second base station.
- the prediction module predicts, according to the current location and the motion state of the mobile device, that the base station that provides the service for the mobile device completes switching from the first base station to the first The duration of the two base stations, including:
- the acquiring module acquires a switching boundary between the first base station and the second base station
- the prediction module determines the duration according to a time required for the mobile device to reach the switching boundary according to the motion state from the location.
- the switching boundary is determined according to a strength of the first base station and a signal strength of the second base station; or the switching boundary is covered according to the first base station signal A cross section of the intersection of the surface of the space with the surface of the second base station signal covering the space is determined.
- the mobile device establishes the second communication connection with the second base station, including:
- the second communication connection is established when the mobile device enters the second base station signal coverage space.
- the base station signal coverage space is determined according to the location and signal strength of the base station.
- the initiating a handover from the first base station to the second base station includes:
- the switching module indicates to the first base station, the second base station, and/or the mobile station that the base station serving the mobile device switches from the first base station to the second base station.
- the completing the handover from the first base station to the second base station includes:
- the switching from the first base station to the second base station includes:
- the first base station hands over the service provided by the mobile device to the second base station.
- the next base station serving the mobile device is determined according to the current location and direction of the mobile device; or the next base station serving the mobile device is based on The base station currently serving the mobile device and the current direction determination of the mobile device.
- the base station currently serving the mobile device is determined according to a current location of the mobile device.
- the motion state includes any combination of direction, velocity, acceleration, and angular velocity.
- FIG. 1 is a schematic diagram of one of methods for determining a handover boundary of a base station in an overlapping area according to an embodiment of the present invention
- FIG. 2 is a schematic diagram of a second method for determining a base station to switch a boundary line in an overlapping area according to an embodiment of the present invention
- FIG. 3 is a schematic diagram of a method for handover of a base station based on a motion state of a mobile device according to an embodiment of the present invention
- FIG. 4 is a flowchart of a method for handover of a base station based on a motion state of a mobile device according to an embodiment of the present invention
- FIG. 5 is a schematic diagram of a module of a base station switching device based on a motion state of a mobile device according to an embodiment of the present invention.
- the embodiments of the present invention are applicable to any mobile device in a wireless communication network, and the vehicle is only one of the typical features of the mobile device that has the characteristics of faster moving speed, lower transmission delay requirement, and higher service continuity requirement.
- the embodiments of the present invention are convenient for description, and the vehicle is taken as an example for illustration, but does not constitute a limitation on the applicable mobile device.
- Precise positioning in ITS is a prerequisite for location-based traffic control and resource scheduling, so vehicles need to determine their location and dynamically update based on their direction, speed, acceleration, and angular velocity. This can be done based on technologies such as global positioning systems and electronic maps.
- the location and signal strength of the base station in the wireless communication network will affect the signal coverage space of the base station.
- the dynamic position of the moving vehicle relative to the various base stations can be used to determine the base station currently serving it and to predict which base stations will be served in the future.
- a base station signal coverage spatial distribution map is constructed based on the location and signal strength of each base station.
- the location determines the center of the base station signal coverage space, and the signal strength determines the size of the base station signal coverage space.
- environmental factors such as astronomy and geography may also affect the size and shape of the coverage space of the base station.
- the switching position between the two base stations in the overlapping area can be determined in the following two ways:
- FIG. 1 is a schematic diagram of one of methods for determining a base station to switch boundaries in an overlapping area.
- the signal coverage space of the base station A partially overlaps with the signal coverage space of the base station B.
- FIG. 2 is a schematic diagram of a second method for determining a base station to switch a boundary line in an overlapping area.
- the signal coverage space of the base station A partially overlaps with the signal coverage space of the base station B.
- a cross section is taken between the signal coverage space surface of the base station A and the signal coverage space surface of the base station B, and the base station A is preferentially used on the side of the cross section facing the base station A, and the side facing the base station B is preferentially located on the interface Use base station B.
- the interface is used as a boundary between the base station A and the base station B for the base station serving the vehicle when the vehicle is traveling, and is switched from the base station B to the base station A when the vehicle enters the interface toward the side of the base station A, when the vehicle enters the interface toward the base station.
- one side of B is switched from base station A to base station B.
- FIG. 3 is a schematic diagram of a base station handover method based on a mobile device motion state.
- the base station serving the vehicle during the running of the vehicle is switched.
- the base station currently serving the vehicle can be determined, assuming base station A.
- a communication connection a has been established between the vehicle and the base station A, and the base station A is using the communication connection a to provide services for the vehicle.
- the next base station serving the vehicle can be determined, assuming base station B.
- a communication connection b is required between the vehicle and the base station B, and the base station B will use the communication connection b to provide services for the vehicle.
- the base station A While the vehicle is in the signal coverage space of the base station A, the base station A is still providing service for the vehicle, that is, while the vehicle maintains the communication connection a with the base station A, the vehicle establishes a communication connection with the base station B in advance when the vehicle travels into the signal coverage space of the base station B. b.
- the base station providing the service completes the period of time from the base station A to the base station B.
- the state of motion of the vehicle may include the direction, speed, acceleration, angular velocity, etc. of the vehicle.
- the duration is reduced to a certain predetermined threshold
- the base station handover is initiated, ie, the base station indicated to the base station A, the base station B and/or the vehicle as the vehicle is switched from the base station A to the base station B. Since the communication connection between the vehicle and the base station B has been established in advance, the threshold can be set according to the time required for the base station to switch from initiation to completion, during which the base station A mainly transfers the service provided to the vehicle to the base station B. This time may be obtained based on calculations, measurements, or statistics.
- the base station handover initiation time determined according to the above method may correspond to different locations for each vehicle.
- the base station A uses the communication connection a to provide service for the vehicle
- the communication connection a between the vehicle and the base station A can be canceled, or the vehicle can be driven away.
- the base station A signal is cancelled when it covers the space.
- the method S100 includes:
- S120 Determine, according to the current location and the motion state of the mobile device, a time period from the current time to the base station serving the mobile device to complete the handover from the first base station to the second base station, where the first base station is currently serving the mobile device. a base station, the second base station being the next base station serving the mobile device;
- FIG. 5 is a block diagram of a base station switching device based on a motion state of a mobile device.
- the apparatus 200 includes:
- the obtaining module 210 is configured to acquire a current position and a motion state of the mobile device; in various possible embodiments, the motion state may include any combination of direction, speed, acceleration, and angular velocity.
- the prediction module 220 is configured to predict, according to the current location and the motion state of the mobile device, a time period from the current time to the base station serving the mobile device to complete the handover from the first base station to the second base station, where the first base station is current A base station serving the mobile device, the second base station being the next base station serving the mobile device.
- the prediction module may determine, according to the current location and direction of the mobile device, the next base station serving the mobile device; or, in another manner, according to the base station and the current service that provides the mobile device.
- the current direction of the mobile device determines the next base station that provides service to the mobile device.
- the switching module 230 is configured to: after the mobile device maintains the first communication connection with the first base station, and establishes a second communication connection with the second base station, initiates the first time when the duration decreases to a set threshold The base station switches to the second base station.
- the switching module is further configured to: based on the assumption that the mobile device has established the second communication connection with the second base station, according to the A base station switches to the second base station, and the threshold is set to a time required for the completion of the handover from the first base station to the second base station.
- the prediction module determines a switching boundary between the first base station and the second base station; determining the duration according to a time required for the mobile device to reach the switching boundary according to the motion state from the location. In one mode, the prediction module determines the switching boundary according to the strength of the first base station and the signal strength of the second base station. Or alternatively, the switching boundary is determined according to a cross section of the intersection of the first base station signal coverage space surface and the second base station signal coverage space surface.
- the switching module reduces the duration after the mobile device maintains a first communication connection with the first base station and establishes a second communication connection with the second base station.
- the base station indicating that the mobile device is served to the first base station, the second base station or the mobile device is handed over from the first base station to the second base station.
- the above solution may be implemented by a vehicle, a base station, a mobile services switching center, or other functional entity.
- the apparatus 200 described above may have a processor processor or a portion of the processor having computing and processing capabilities.
- the implementer needs to know the spatial distribution of the base station signal coverage, including the switching boundary between the base stations with overlapping coverage spaces, as well as the current position and motion state of the vehicle.
- apparatus 200 in accordance with an embodiment of the present invention may correspond to an execution subject of method 100 of an embodiment of the present invention, and that the above and other operations and/or functions of various modules in apparatus 200 are respectively implemented to implement a corresponding flow of method 100.
- apparatus 200 in accordance with an embodiment of the present invention may correspond to an execution subject of method 100 of an embodiment of the present invention, and that the above and other operations and/or functions of various modules in apparatus 200 are respectively implemented to implement a corresponding flow of method 100.
- B corresponding to A means that B is associated with A, and B can be determined according to A.
- determining B from A does not mean that B is only determined based on A, and that B can also be determined based on A and/or other information.
- 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, or an electrical, mechanical or other form of connection.
- 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 objectives of the embodiments of the present invention.
- 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 above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
- the storage medium includes instructions for causing 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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Abstract
本发明公开了一种基于移动设备运动状态的基站切换方法和设备,该方法包括:获取移动设备当前的位置和运动状态;根据该移动设备当前的位置和运动状态预测从当前时刻到为该移动设备提供服务的基站完成从第一基站切换为第二基站的时长,该第一基站为当前为该移动设备提供服务的基站,该第二基站为下一个为该移动设备提供服务的基站;在该移动设备与该第一基站保持第一通信连接,并与该第二基站建立第二通信连接之后,当该时长减少达到设定的阈值时,发起从该第一基站切换为该第二基站。本发明实施例提供的基于移动设备运动状态的基站切换方法和设备,能够在更佳时间发起并无缝快速完成基站切换,满足安全保障和效率提升的需求。
Description
本发明涉及无线通信领域,尤其涉及一种基于移动设备运动状态的基站切换方法和设备。
智能交通系统(Intelligent Transportation System,ITS)旨在通过集成应用先进的信息、通信、传感、控制和计算机等技术,建立大范围、全方位发挥作用并且实时、准确、高效的综合交通运输管理系统。
ITS可以有效利用交通设施、减少交通负荷和环境污染、保证交通安全、提高运输效率,是交通系统未来的发展方向,也是智能城市(Intelligent City)的重要组成部分。ITS的主要参与者涉及道路基础设施、车辆、管理中心和用户等。
ITS中的车辆作为主要的交通工具,需要与其它车辆、道路基础设施、交通管理中心和用户等进行联系,也称为车辆到其它通信(Vehicle to Everything,V2X)。
当V2X基于无线通信网络,例如LTE、5G等实现时,车辆作为移动设备将在各基站的服务小区之间行驶,因此基站需要进行切换以保障为车辆提供服务的连续性。
目前确定基站切换根据的是手机等移动设备接收到的基站信号强度。当移动设备接收到的当前为其服务基站的信号强度低于另一基站信号强度时,将该另一基站作为下一个为其服务基站,然后移动设备与下一个为其服务基站建立通信连接,最后基站为移动设备提供的服务才从当前为其服务基站移交给下一个为其服务基站。
然而相比手机等传统移动设备,车辆作为一种新移动设备,具有移动速度更快、传输时延要求更低、服务连续性要求更高的特点。这种情况下,仅靠基站信号强度来确定基站切换的及时性和可靠性都不够,甚至可能出现车辆已跨越服务小区而基站切换尚未完成的情况。
发明内容
本发明实施例提供了一种基于移动设备运动状态的基站切换方法和设备,能够在更合理的时间启动并无缝快速完成基站切换,满足安全保障和效率提升的需求。
第一方面,提供了一种基于移动设备运动状态的基站切换方法,所述方法包括:
获取移动设备当前的位置和运动状态;
根据所述移动设备当前的位置和运动状态预测从当前时刻到为所述移动设备提供服务的基站完成从第一基站切换为第二基站的时长,其中,所述第一基站为当前为所述移动设备提供服务的基站,所述第二基站为下一个为所述移动设备提供服务的基站;
在所述移动设备与所述第一基站保持第一通信连接,并与所述第二基站建立第二通信连接之后,当所述时长减少达到设定的阈值时,发起从所述第一基站切换为所述第二基站。
在一种可能的实现方式中,所述阈值基于假设所述移动设备已与所述第二基站建立所述第二 通信连接的前提下,根据从所述发起从所述第一基站切换为所述第二基站,到所述完成从所述第一基站切换为所述第二基站所需时间设定。
在一种可能的实现方式中,所述根据所述移动设备当前的位置和运动状态预测从当前时刻到为所述移动设备提供服务的基站完成从所述第一基站切换为所述第二基站的时长,包括:
获取所述第一基站与所述第二基站之间的切换界线;
所述时长根据所述移动设备从所述位置按照所述运动状态到达所述切换界线所需时间确定。
在一种可能的实现方式中,所述切换界线根据所述第一基站信号强度与所述第二基站信号强度的强弱分界面确定;或者,所述切换界线根据所述第一基站信号覆盖空间表面与所述第二基站信号覆盖空间表面的相交点截面确定。
在一种可能的实现方式中,所述移动设备与所述第二基站建立所述第二通信连接,包括:
所述第二通信连接当所述移动设备进入所述第二基站信号覆盖空间时建立。
在一种可能的实现方式中,所述基站信号覆盖空间根据所述基站的位置和信号强度确定。
在一种可能的实现方式中,所述发起从所述第一基站切换为所述第二基站,包括:
向所述第一基站、所述第二基站和/或所述移动设备指示为所述移动设备提供服务的基站从所述第一基站切换为所述第二基站。
在一种可能的实现方式中,所述完成从所述第一基站切换为所述第二基站,包括:
从所述第一基站使用所述第一通信连接为所述移动设备提供服务,切换为所述第二基站使用所述第二通信连接为所述移动设备提供服务。
在一种可能的实现方式中,所述从所述第一基站切换为所述第二基站,包括:
所述第一基站向所述第二基站移交为所述移动设备提供的服务。
在一种可能的实现方式中,所述下一个为所述移动设备提供服务的基站根据所述移动设备当前的位置和方向确定;或者,所述下一个为所述移动设备提供服务的基站根据所述当前为所述移动设备提供服务的基站和所述移动设备当前的方向确定。
在一种可能的实现方式中,所述当前为所述移动设备提供服务的基站,根据所述移动设备当前的位置确定。
在一种可能的实现方式中,所述运动状态包括方向、速度、加速度、角速度的任意组合。
第二方面,提供了一种基于移动设备运动状态的基站切换设备,所述设备包括:
获取模块,用于获取移动设备当前的位置和运动状态;
预测模块,用于根据所述移动设备当前的位置和运动状态预测从当前时刻到为所述移动设备提供服务的基站完成从第一基站切换为第二基站的时长,其中,所述第一基站为当前为所述移动设备提供服务的基站,所述第二基站为下一个为所述移动设备提供服务的基站;
切换模块,用于在所述移动设备与所述第一基站保持第一通信连接,并与所述第二基站建立第二通信连接之后,当所述时长减少达到设定的阈值时,发起从所述第一基站切换为所述第二基站。
在一种可能的实现方式中,所述设备还包括:
设定模块,用于基于假设所述移动设备已与所述第二基站建立所述第二通信连接的前提下,根据从所述发起从所述第一基站切换为所述第二基站,到所述完成从所述第一基站切换为所述第二基站所需时间设定所述阈值。
在一种可能的实现方式中,所述预测模块根据所述移动设备当前的位置和运动状态预测从当前时刻到为所述移动设备提供服务的基站完成从所述第一基站切换为所述第二基站的时长,包括:
所述获取模块获取所述第一基站与所述第二基站之间的切换界线;
所述预测模块根据所述移动设备从所述位置按照所述运动状态到达所述切换界线所需时间确定所述时长。
在一种可能的实现方式中,所述切换界线根据所述第一基站信号强度与所述第二基站信号强度的强弱分界面确定;或者,所述切换界线根据所述第一基站信号覆盖空间表面与所述第二基站信号覆盖空间表面的相交点截面确定。
在一种可能的实现方式中,所述移动设备与所述第二基站建立所述第二通信连接,包括:
所述第二通信连接当所述移动设备进入所述第二基站信号覆盖空间时建立。
在一种可能的实现方式中,所述基站信号覆盖空间根据所述基站的位置和信号强度确定。
在一种可能的实现方式中,所述发起从所述第一基站切换为所述第二基站,包括:
所述切换模块向所述第一基站、所述第二基站和/或所述移动设备指示为所述移动设备提供服务的基站从所述第一基站切换为所述第二基站。
在一种可能的实现方式中,所述完成从所述第一基站切换为所述第二基站,包括:
从所述第一基站使用所述第一通信连接为所述移动设备提供服务,切换为所述第二基站使用所述第二通信连接为所述移动设备提供服务。
在一种可能的实现方式中,所述从所述第一基站切换为所述第二基站,包括:
所述第一基站向所述第二基站移交为所述移动设备提供的服务。
在一种可能的实现方式中,所述下一个为所述移动设备提供服务的基站根据所述移动设备当前的位置和方向确定;或者,所述下一个为所述移动设备提供服务的基站根据所述当前为所述移动设备提供服务的基站和所述移动设备当前的方向确定。
在一种可能的实现方式中,所述当前为所述移动设备提供服务的基站,根据所述移动设备当前的位置确定。
在一种可能的实现方式中,所述运动状态包括方向、速度、加速度、角速度的任意组合。
图1是本发明实施例提供的确定基站在重叠区域中切换界线的方法之一的示意图;
图2是本发明实施例提供的确定基站在重叠区域中切换界线的方法之二的示意图;
图3是本发明实施例提供的基于移动设备运动状态的基站切换方法的示意图;
图4是本发明实施例提供的基于移动设备运动状态的基站切换方法的流程图;
图5是本发明实施例提供的基于移动设备运动状态的基站切换设备的模块示意图。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本发明的一部分实施例,而不是全部实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都应属于本发明保护的范围。
应理解,本发明实施例可应用于无线通信网络中的任意移动设备,车辆只是这些移动设备里具有移动速度更快、传输时延要求更低、服务连续性要求更高特点的典型之一,本发明实施例为描述方便,以车辆为例进行说明,但不构成对可应用移动设备的限定。
ITS中精确定位是进行基于位置的交通控制和资源调度的前提,因此车辆需要确定自己的位置,并根据自己行驶的方向、速度、加速度、角速度动态进行更新。这可以基于全球定位系统和电子地图等技术实现。
无线通信网络中基站的位置和信号强度将影响基站的信号覆盖空间。因此行驶中的车辆相对于各个基站的动态位置,可以用来决定当前为其服务的基站,以及预测未来将可能为其服务的基站。
在特定区域内,基于各个基站的位置和信号强度构建基站信号覆盖空间分布图。位置决定了基站信号覆盖空间的中心,信号强度决定了基站信号覆盖空间的大小。另外天文、地理等环境因素也可能影响基站覆盖空间的大小和形状。
如果两个基站的信号覆盖空间部分重叠,那么在重叠区域中对这两个基站之间的切换位置可以按照以下两种方法确定:
图1是确定基站在重叠区域中切换界线的方法之一的示意图。
如图1所示,基站A的信号覆盖空间与基站B的信号覆盖空间部分重叠。
在重叠区域中的各个位置上对基站A的信号强度与基站B的信号强度进行比较形成强弱分界面,在该分界面上基站A的信号强度等于基站B的信号强度,在该分界面一侧基站A的信号强度大于基站B的信号强度,在该分界面另一侧基站A的信号强度小于基站B的信号强度。
将该分界面作为车辆行驶时为其服务的基站在基站A与基站B之间进行切换的界线,当车辆进入基站A信号强度大于基站B的信号强度的一侧时从基站B切换为基站A,当车辆进入基站A信号强度小于基站B的信号强度的一侧时从基站A切换为基站B。
图2是确定基站在重叠区域中切换界线的方法之二的示意图。
如图2所示,基站A的信号覆盖空间与基站B的信号覆盖空间部分重叠。
在重叠区域中对基站A的信号覆盖空间表面与基站B的信号覆盖空间表面的相交点取截面,在该截面朝向基站A的一侧优先使用基站A,在该界面朝向基站B的一侧优先使用基站B。
将该界面作为车辆行驶时为其服务的基站在基站A与基站B之间进行切换的界线,当车辆进入界面朝向基站A的一侧时从基站B切换为基站A,当车辆进入界面朝向基站B的一侧时从基站A切换为基站B。
图3是基于移动设备运动状态的基站切换方法的示意图。
如图3所示,车辆行驶过程中为其提供服务的基站发生切换。
基于基站信号覆盖空间分布,根据车辆的当前位置,可以确定当前为该车辆提供服务的基站,假设为基站A。车辆与基站A之间已建立通信连接a,基站A正使用通信连接a为车辆提供服务。
基于基站信号覆盖空间分布,根据车辆当前的位置和方向,或者根据当前为车辆提供服务的基站A和车辆当前的方向,可以确定下一个为该车辆提供服务的基站,假设为基站B。车辆与基站B之间需建立通信连接b,基站B将使用通信连接b为车辆提供服务。
在车辆处于基站A信号覆盖空间,基站A仍在为车辆提供服务,也即车辆与基站A保持通信连接a的同时,当车辆行驶进入基站B信号覆盖空间时,车辆与基站B提前建立通信连接b。
基于重叠区域中基站A与基站B之间的切换界线,以及车辆当前的位置和运动状态,可以根据车辆从该位置按照该运动状态行驶到达该切换界线所需时间,确定从当前时刻到为车辆提供服务的基站完成从基站A切换为基站B的时长。车辆的运动状态可能包括车辆行驶的方向、速度、加速度、角速度等。
该时长随着车辆的行驶而动态变化。如果该时长减少达到某个预先设定的阈值,则发起基站切换,也即向基站A、基站B和/或车辆指示为车辆服务的基站从基站A切换为基站B。因为车辆与基站B的通信连接已经提前建立,所以该阈值可以根据基站切换从发起到完成所需时间设定,期间主要进行基站A向基站B移交为车辆提供的服务。该时间可能基于计算、测量或统计等手段获得。
因为各个车辆运动状态的不同,根据上述方法确定的基站切换发起时刻,对各个车辆而言可能对应到不同的位置。
当基站切换完成,也即从基站A使用通信连接a为车辆提供服务,切换为基站B使用通信连接a为车辆提供服务后,车辆与基站A的通信连接a可以取消,也可以在车辆行驶离开基站A信号覆盖空间时才取消。
图4是基于移动设备运动状态的基站切换方法的流程示意图。在具体的实施例中,可以由基站执行,也可以由移动设备来执行,在智能驾驶领域还可以是移动业务交换中心来执行。如图4所示,该方法S100包括:
S110,获取移动设备当前的位置和运动状态;
S120,根据该移动设备当前的位置和运动状态确定从当前时刻到为该移动设备提供服务的基站完成从第一基站切换为第二基站的时长,该第一基站为当前为该移动设备提供服务的基站,该第二基站为下一个为该移动设备提供服务的基站;
S130,在该移动设备与该第一基站保持第一通信连接,并与该第二基站建立第二通信连接之后,判断该时长减少是否达到设定的阈值,是则执行S140,否则返回S110;
S140,发起从该第一基站切换为该第二基站。
图5是基于移动设备运动状态的基站切换设备的模块示意图。
如图5所示,该装置200包括:
获取模块210,用于获取移动设备当前的位置和运动状态;在各种可能的实施例中,运动状 态可以包括方向、速度、加速度、角速度的任意组合。
预测模块220,用于根据该移动设备当前的位置和运动状态预测从当前时刻到为该移动设备提供服务的基站完成从第一基站切换为第二基站的时长,其中,该第一基站为当前为该移动设备提供服务的基站,该第二基站为下一个为该移动设备提供服务的基站。
预测模块可以根据所述移动设备当前的位置和方向确定所述下一个为所述移动设备提供服务的基站;或者,另一种方式,根据所述当前为所述移动设备提供服务的基站和所述移动设备当前的方向确定所述下一个为所述移动设备提供服务的基站。
切换模块230,用于在该移动设备与该第一基站保持第一通信连接,并与该第二基站建立第二通信连接之后,当该时长减少达到设定的阈值时,发起从该第一基站切换为该第二基站。
在一种实现方式中,在装置200中,切换模块还用于基于假设所述移动设备已与所述第二基站建立所述第二通信连接的前提下,根据从所述发起从所述第一基站切换为所述第二基站,到所述完成从所述第一基站切换为所述第二基站所需时间设定所述阈值。
在具体的实施中,预测模块确定第一基站与第二基站之间的切换界线;根据所述移动设备从所述位置按照所述运动状态到达所述切换界线所需时间确定所述时长。作为一种方式,预测模块根据所述第一基站信号强度与所述第二基站信号强度的强弱分界面确定所述切换界线。或者另一种方式,根据所述第一基站信号覆盖空间表面与所述第二基站信号覆盖空间表面的相交点截面确定所述切换界线。
对于切换的一种更为具体点可能方式,切换模块在所述移动设备与所述第一基站保持第一通信连接,并与所述第二基站建立第二通信连接之后,当所述时长减少达到设定的阈值时,向所述第一基站、所述第二基站或所述移动设备指示为所述移动设备提供服务的基站从所述第一基站切换为所述第二基站。
上述方案可以由车辆、基站、移动业务交换中心或其它功能实体实施。上述的装置200可以使一个处理器processor或者处理器中部分具有计算和处理能力的模块。实施者需要了解基站信号覆盖空间分布,包括有重叠覆盖空间的基站之间的切换界线,以及车辆当前的位置和运动状态。
应理解,根据本发明实施例的装置200可对应于本发明实施例的方法100的执行主体,并且装置200中的各个模块的上述和其它操作和/或功能分别为了实现方法100的相应流程。为了简洁,在此不再赘述。
应理解,在本发明实施例中,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
还应理解,在本文中使用的,除非上下文清楚地支持例外情况,单数形式“一个”(“a”、“an”、“the”)旨在也包括复数形式。还应理解,在本文中使用的“和/或”是指包括一个或者一个以上相关联地列出的项目的任意和所有可能组合。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、计算机软件或者二者的结合来实现,为了清楚地说明硬件和软件的可互换性,在上述说明中已经按照功能一般性地描述了各示例的组成及步骤。这些功能究竟以硬件还是 软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本发明的范围。
所属领域的技术人员可以清楚地了解到,为了描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另外,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口、装置或单元的间接耦合或通信连接,也可以是电的,机械的或其它的形式连接。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本发明实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以是两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。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,或者所述技术方案的全部或部分可以以软件产品的形式体现出来,所述计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到各种等效的修改或替换,这些修改或替换都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应以权利要求的保护范围为准。
Claims (15)
- 一种基于移动设备运动状态的基站切换方法,其特征在于,包括:获取移动设备当前的位置和运动状态;根据所述移动设备当前的位置和运动状态预测从当前时刻到为所述移动设备提供服务的基站完成从第一基站切换为第二基站的时长,其中,所述第一基站为当前为所述移动设备提供服务的基站,所述第二基站为下一个为所述移动设备提供服务的基站;在所述移动设备与所述第一基站保持第一通信连接,并与所述第二基站建立第二通信连接之后,当所述时长减少达到设定的阈值时,发起从所述第一基站切换为所述第二基站。
- 根据权利要求1所述的方法,其特征在于,还包括:所述阈值基于假设所述移动设备已与所述第二基站建立所述第二通信连接的前提下,根据从所述发起从所述第一基站切换为所述第二基站,到所述完成从所述第一基站切换为所述第二基站所需时间设定。
- 根据权利要求1所述的方法,其特征在于,所述根据所述移动设备当前的位置和运动状态预测从当前时刻到为所述移动设备提供服务的基站完成从所述第一基站切换为所述第二基站的时长,包括:获取所述第一基站与所述第二基站之间的切换界线;所述时长根据所述移动设备从所述位置按照所述运动状态到达所述切换界线所需时间确定。
- 根据权利要求3所述的方法,其特征在于,还包括:所述切换界线根据所述第一基站信号强度与所述第二基站信号强度的强弱分界面确定;或者,所述切换界线根据所述第一基站信号覆盖空间表面与所述第二基站信号覆盖空间表面的相交点截面确定。
- 根据权利要求1或2中任一项所述的方法,其特征在于,所述移动设备与所述第二基站建立所述第二通信连接,包括:所述第二通信连接当所述移动设备进入所述第二基站信号覆盖空间时建立。
- 根据权利要求1或2中任一项所述的方法,其特征在于,所述发起从所述第一基站切换为所述第二基站,包括:向所述第一基站、所述第二基站或所述移动设备指示为所述移动设备提供服务的基站从所述第一基站切换为所述第二基站。
- 根据权利要求1所述的方法,其特征在于,还包括:所述下一个为所述移动设备提供服务的基站根据所述移动设备当前的位置和方向确定;或者,所述下一个为所述移动设备提供服务的基站根据所述当前为所述移动设备提供服务的基站和所述移动设备当前的方向确定。
- 根据权利要求1或3中任一项所述的方法,其特征在于,所述运动状态包括方向、速度、 加速度、角速度的任意组合。
- 一种基于移动设备运动状态的基站切换装置,其特征在于,包括:获取模块,用于获取移动设备当前的位置和运动状态;预测模块,用于根据所述移动设备当前的位置和运动状态预测从当前时刻到为所述移动设备提供服务的基站完成从第一基站切换为第二基站的时长,其中,所述第一基站为当前为所述移动设备提供服务的基站,所述第二基站为下一个为所述移动设备提供服务的基站;切换模块,用于在所述移动设备与所述第一基站保持第一通信连接,并与所述第二基站建立第二通信连接之后,当所述时长减少达到设定的阈值时,发起从所述第一基站切换为所述第二基站。
- 根据权利要求9所述的装置,其特征在于所述切换模块,还用于基于假设所述移动设备已与所述第二基站建立所述第二通信连接的前提下,根据从所述发起从所述第一基站切换为所述第二基站,到所述完成从所述第一基站切换为所述第二基站所需时间设定所述阈值。
- 根据权利要求9所述的装置,其特征在于,所述预测模块具体用于:确定所述第一基站与所述第二基站之间的切换界线;根据所述移动设备从所述位置按照所述运动状态到达所述切换界线所需时间确定所述时长;其中,所述第一基站为当前为所述移动设备提供服务的基站,所述第二基站为下一个为所述移动设备提供服务的基站。
- 根据权利要求11所述的装置,其特征在于,预测模块还用于根据所述第一基站信号强度与所述第二基站信号强度的强弱分界面确定所述切换界线;或者根据所述第一基站信号覆盖空间表面与所述第二基站信号覆盖空间表面的相交点截面确定所述切换界线。
- 根据权利要求9所述的装置,其特征在于,切换模块,具体用于在所述移动设备与所述第一基站保持第一通信连接,并与所述第二基站建立第二通信连接之后,当所述时长减少达到设定的阈值时,所述切换模块向所述第一基站、所述第二基站或所述移动设备指示为所述移动设备提供服务的基站从所述第一基站切换为所述第二基站。
- 根据权利要求9所述的装置,其特征在于,所述预测模块还用于,根据所述移动设备当前的位置和方向确定所述下一个为所述移动设备提供服务的基站;或者,根据所述当前为所述移动设备提供服务的基站和所述移动设备当前的方向确定所述下一个为所述移动设备提供服务的基站。
- 根据权利要求9-14中任一项所述的装置,其特征在于,所述运动状态包括方向、速度、加速度、角速度的任意组合。
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