CN113891411B - MEC switching method and device and electronic equipment - Google Patents
MEC switching method and device and electronic equipment Download PDFInfo
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- CN113891411B CN113891411B CN202111210282.4A CN202111210282A CN113891411B CN 113891411 B CN113891411 B CN 113891411B CN 202111210282 A CN202111210282 A CN 202111210282A CN 113891411 B CN113891411 B CN 113891411B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
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- 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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention provides a MEC switching method, a MEC switching device and electronic equipment, relates to the technical field of communication, and solves the problem of switching MEC in the process of moving a terminal. Determining a target moment when a terminal leaves an actual network node according to historical position information of the terminal, at least one first MEC boundary node and actual position information; determining the switching time of switching MEC according to the time required by switching MEC and the target time; determining theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal; and under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is greater than or equal to the preset resource, notifying the terminal to switch from the MEC of the current service to the MEC deployed at the target network node.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a Multi-access edge computing (Multi-accessed gecomputing, MEC) switching method, apparatus, and electronic device.
Background
MEC essentially provides a terminal with internet technology (internet technology, IT) and cloud computing based capabilities in the vicinity of the radio access network (radio access network, RAN), providing a high bandwidth and low latency service processing environment.
The MEC can unload the service of the terminal to a network edge node, such as a base station or a wireless access point, so as to realize localization of the service, reduce service delay of the terminal and improve service response speed. Although the MEC may provide a high bandwidth, low latency service processing environment for the terminal, as the terminal moves, the service processing between the terminal and the MEC will also be affected, as the terminal may need to switch connections between different base stations. Therefore, how to switch MECs during terminal movement becomes a urgent problem to be solved.
Disclosure of Invention
The invention provides a MEC switching method, a MEC switching device and electronic equipment, which are used for solving the problem of switching MEC in the moving process of a terminal.
In order to achieve the above purpose, the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a MEC switching method, including: acquiring actual position information of a terminal at the current moment and at least one first MEC boundary node of an actual network node of an MEC currently serving the terminal; determining a target moment when the terminal leaves the actual network node according to the historical position information of the terminal, the at least one first MEC boundary node and the actual position information; determining the switching time of switching MEC according to the time required by switching MEC and the target time; determining theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal; determining at least one second MEC border node of the theoretical network node; determining a target network node according to the historical position information and the actual position information of the terminal of the at least one second MEC boundary node; and under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is greater than or equal to the preset resource, notifying the terminal to switch from the MEC of the current service to the MEC deployed at the target network node.
As can be seen from the foregoing, in the MEC switching method provided by the present invention, the electronic device obtains the actual location information of the terminal at the current time, and at least one first MEC border node of the actual network node where the MEC currently served by the terminal belongs to. The electronic equipment determines the target moment when the terminal leaves the actual network node according to the historical position information of the terminal, the at least one first MEC boundary node and the actual position information. And the electronic equipment determines the switching time for switching the MEC according to the time required for switching the MEC and the target time. And the electronic equipment determines theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal. The electronics determine at least one second MEC border node of the theoretical network node. The electronic equipment determines a target network node according to the historical position information and the actual position information of the terminal of the at least one second MEC boundary node. And under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is greater than or equal to the preset resource, notifying the terminal to switch from the MEC of the current service to the MEC deployed at the target network node. Therefore, the terminal can determine how to switch MEC in the moving process, and the problem of how to switch MEC in the moving process is solved.
In an implementation manner, the MEC switching method provided by the embodiment of the present invention further includes: acquiring at least one other network node meeting a preset condition under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is smaller than the preset resource; the method comprises the steps that a preset condition comprises a network node, wherein the communication time delay between the network node and a target network node is smaller than or equal to a time delay threshold value, and the computing resource is larger than or equal to a preset resource; in case that the at least one other network node comprises only one other network node, informing the terminal to switch from the currently served MEC to the MEC deployed at the other network node; and in the case that the at least one other network node comprises a plurality of other network nodes, determining the other network node with the smallest communication delay with the target network node in the plurality of other network nodes, and notifying the terminal to switch from the MEC of the current service to the MEC of the other network node with the smallest communication delay with the target network node in the plurality of other network nodes.
In one implementation, determining, based on at least one first MEC border node, historical location information of the terminal, and actual location information, a target time at which the terminal leaves the actual network node includes: determining a moving track of the terminal according to the historical position information and the actual position information of the terminal; and determining the target moment when the terminal leaves the actual network node according to the at least one first MEC boundary node and the movement track.
In one implementation, determining a switching moment for switching the MEC according to a duration required for switching the MEC and a target moment includes: and determining the switching moment of switching MEC according to the difference value between the target moment and the time length required for switching MEC.
In one implementation, determining the target network node according to the historical location information and the actual location information of the terminal, the at least one second MEC border node includes: determining a moving track of the terminal according to the historical position information and the actual position information of the terminal; and determining an intersection point of the graph formed by the at least one second MEC boundary node serving as a vertex and the moving track as a target network node.
In a second aspect, the present invention provides an MEC switching apparatus, comprising: the device comprises an acquisition unit, a processing unit and a sending unit.
The terminal comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring the actual position information of the terminal at the current moment and at least one first MEC boundary node of an actual network node where the MEC serving the terminal currently belongs; the processing unit is used for determining the target moment when the terminal leaves the actual network node according to the historical position information of the terminal, the at least one first MEC boundary node acquired by the acquisition unit and the actual position information acquired by the acquisition unit; the processing unit is also used for determining the switching time of switching MEC according to the time required by switching MEC and the target time; the processing unit is further used for determining theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information of the terminal, the switching time and the actual position information acquired by the acquisition unit; a processing unit further configured to determine at least one second MEC border node of the theoretical network node; the processing unit is further used for determining a target network node according to the at least one second MEC boundary node, the historical position information of the terminal and the actual position information acquired by the acquisition unit; and the processing unit is also used for controlling the sending unit to inform the terminal to switch from the MEC of the current service to the MEC deployed at the target network node under the condition that the current time is equal to the switching time and the computing resource of the target network node is greater than or equal to the preset resource.
In an achievable manner, the obtaining unit is further configured to obtain at least one other network node that meets the preset condition when the current time is equal to the handover time and the computing resource of the target network node is smaller than the preset resource; the method comprises the steps that a preset condition comprises a network node, wherein the communication time delay between the network node and a target network node is smaller than or equal to a time delay threshold value, and the computing resource is larger than or equal to a preset resource; the processing unit is further configured to notify the terminal to switch from the currently served MEC to the MEC deployed at the other network node, if the at least one other network node acquired by the acquiring unit includes only one other network node; and the processing unit is further used for determining other network nodes with the smallest communication delay with the target network node in the plurality of other network nodes when the at least one other network node acquired by the acquiring unit comprises the plurality of other network nodes, and controlling the sending unit to inform the terminal to switch from the MEC currently served to the MEC deployed in the other network nodes with the smallest communication delay with the target network node in the plurality of other network nodes.
In one implementation manner, the processing unit is specifically configured to determine a movement track of the terminal according to the historical position information of the terminal and the actual position information acquired by the acquiring unit; the processing unit is specifically configured to determine a target moment when the terminal leaves the actual network node according to the at least one first MEC boundary node and the movement track.
In one implementation, the processing unit is specifically configured to determine a switching time of switching the MEC according to a difference between the target time and a time length required for switching the MEC.
In one implementation manner, the processing unit is specifically configured to determine a movement track of the terminal according to the historical position information of the terminal and the actual position information acquired by the acquiring unit; the processing unit is specifically configured to determine, as a target network node, a junction of a graph formed by using at least one second MEC boundary node as a vertex and a movement track.
In a third aspect, the present invention provides an electronic device comprising: communication interface, processor, memory, bus; the memory is used for storing computer execution instructions, and the processor is connected with the memory through a bus. When the electronic device is running, the processor executes the computer-executable instructions stored in the memory to cause the electronic device to perform the MEC switching method as provided in the first aspect described above.
In a fourth aspect, the present invention provides a computer-readable storage medium comprising instructions. The instructions, when executed on a computer, cause the computer to perform the MEC switching method as provided in the first aspect above.
In a fifth aspect, the present invention provides a computer program product for, when run on a computer, causing the computer to perform the MEC switching method as set forth in the design of the first aspect.
It should be noted that the above-mentioned computer instructions may be stored in whole or in part on the first computer readable storage medium. The first computer readable storage medium may be packaged together with the processor of the electronic device or may be packaged separately from the processor of the electronic device, which is not limited in the present invention.
The description of the second, third, fourth and fifth aspects of the present invention may refer to the detailed description of the first aspect; further, the advantageous effects described in the second aspect, the third aspect, the fourth aspect, and the fifth aspect may refer to the advantageous effect analysis of the first aspect, and are not described herein.
In the present invention, the names of the above-mentioned electronic devices do not constitute limitations on the devices or function modules themselves, and in actual implementation, these devices or function modules may appear under other names. Insofar as the function of each device or function module is similar to that of the present invention, it falls within the scope of the claims of the present invention and the equivalents thereof.
These and other aspects of the invention will be more readily apparent from the following description.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a communication system to which the MEC switching method is applied according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a MEC switching method according to an embodiment of the present invention;
FIG. 3 is a second flow chart of a MEC switching method according to the present invention;
fig. 4 is a third flow chart of a MEC switching method according to an embodiment of the invention;
fig. 5 is a schematic diagram of terminal movement in an MEC handover method according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of an electronic device according to an embodiment of the present invention;
FIG. 7 is a second schematic diagram of an electronic device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a computer program product of an MEC switching method according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention are described below with reference to the accompanying drawings.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to clearly describe the technical solution of the embodiments of the present invention, in the embodiments of the present invention, the terms "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect, and those skilled in the art will understand that the terms "first", "second", etc. do not limit the number and execution order.
Fig. 1 is a simplified schematic diagram of a system architecture to which the embodiment of the present invention may be applied, as shown in fig. 1, where the system architecture may include:
server 1, at least one network node (e.g. at least one network node comprises 2 network nodes and the network node is a base station, then the 2 network nodes are base station 2 and base station 3 respectively), and terminal 4.
The MEC currently serving the terminal is deployed at the base station 2, and the terminal moves according to the moving direction a. The server 1 is configured to obtain actual location information of a terminal at a current time, and at least one first MEC border node of an actual network node where a MEC currently serving the terminal belongs; the server 1 determines the target moment when the terminal leaves the actual network node according to the historical position information of the terminal, at least one first MEC boundary node and the actual position information; the server 1 determines the switching time of switching MEC according to the time required by switching MEC and the target time; the server 1 determines theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal; the server 1 determines at least one second MEC border node of the theoretical network node; the server 1 determines a target network node according to the historical position information and the actual position information of the terminal of at least one second MEC boundary node; and under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is greater than or equal to the preset resource, the server 1 informs the terminal to switch from the MEC of the current service to the MEC deployed at the target network node.
In an embodiment of the invention, the terminal is used for providing voice and/or data connectivity services to the user. The terminals may be variously named, for example, user Equipment (UE), access terminals, terminal units, terminal stations, mobile stations, remote terminals, mobile devices, wireless communication devices, vehicle user equipment, terminal agents or end devices, etc. Optionally, the terminal may be a handheld device, an in-vehicle device, a wearable device, or a computer with a communication function, which is not limited in any way in the embodiment of the present invention. For example, the handheld device may be a smart phone. The in-vehicle device may be an in-vehicle navigation system. The wearable device may be a smart bracelet. The computer may be a personal digital assistant (personal digital assistant, PDA) computer, a tablet computer, or a laptop computer (laptop computer).
The following describes the MEC switching method provided by the embodiment of the present invention, taking an electronic device as a server 1 as an example in connection with the communication system shown in fig. 1.
As shown in fig. 2, the MEC switching method includes the contents of steps S11 to S17:
s11, the server 1 acquires actual position information of the terminal at the current moment and at least one first MEC boundary node of an actual network node of an MEC currently serving the terminal.
Specifically, the server 1 may obtain the actual location information of the terminal through a measurement report (Measurement Report, MR) reported by the terminal. The actual location information may be location information provided by a navigation system, such as a global positioning system (Global Positioning System, GPS), or a beidou satellite navigation system (BeiDou Navigation Satellite System, BDS) in china, or the like.
Specifically, the server 1 obtains at least one first MEC border node of an actual network node where the MEC currently serving the terminal is located, comprising:
the server 1 determines the maximum communication distance of the actual network node. The maximum communication distance may be understood as the furthest effective distance that the theoretical network node can reach to send the service data of the target service, and when the communication distance that the theoretical network node sends the service data is greater than the maximum communication distance, the receiving device may not receive the service data, or the service data fails, or the like.
The server 1 determines a plurality of MEC border nodes from a plurality of transmissible paths corresponding to the actual network nodes. One of the transmissible paths corresponds to a first MEC boundary node, and the first MEC boundary node is the network node with the largest communication distance among at least one network node with the communication distance smaller than or equal to the largest communication distance with the actual network node on the transmissible path. The server 1 illustratively obtains the target delay of the actual network node in transmitting the target traffic. And determining the maximum communication distance of the actual network node according to the target time delay and the target speed. Each target service corresponds to a service type, each service type corresponds to a target time delay, and the target speed is the speed corresponding to the transmission of the target service by the actual network node, and particularly is the transmission speed of service data of the target service. The maximum communication distance is the product of the target time delay and the target speed, i.e. the server 1 determines the product of the target time delay and the target speed as the maximum communication distance of the actual network node.
S12, the server 1 determines the target moment when the terminal leaves the actual network node according to the historical position information of the terminal, at least one first MEC boundary node and the actual position information.
S13, the server 1 determines the switching moment of switching MEC according to the time required for switching MEC and the target moment.
S14, the server 1 determines theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal.
Specifically, when the moving speed of the terminal is greater than a speed threshold, such as 80km/h. At this time, the server 1 determines that the terminal is in a high-speed moving scene, such as a high-speed rail scene. Because the terminal of the high-speed rail scene always moves on the rail, the moving speed of the terminal can be determined according to the historical position information and the actual position information of the terminal. And then, determining theoretical position information corresponding to the terminal at the switching moment according to the moving speed of the terminal and the difference value between the switching moment and the current moment. Such as: when the current time is 11 points and 10 minutes, the switching time is 11 points and 15 minutes, and the moving speed is 180km/h, the terminal moves from the current time to the switching time in total Therefore, the theoretical position information is a position 15km away from the actual position information in the moving direction of the terminal.
When the moving speed of the terminal is less than or equal to a speed threshold, such as 80km/h. At this time, the server 1 determines that the terminal is in a low-speed moving scene, such as a public transportation scene. Because the moving track of the bus scene terminal is relatively unfixed, the moving model of the terminal can be obtained by counting the historical position information of the terminal in a preset time period, such as counting the historical position information of the terminal in 3 months and performing model training on the historical position information in 3 months. The mobile model contains the position information corresponding to the terminal at each moment. Then, the actual position information of the terminal at the current moment is input into the movement model to determine the initial position of the terminal. Further, after the switching time is reached to the movement model, the server 1 can predict the theoretical position information corresponding to the terminal at the switching time.
The moving speed can be obtained through MR data reported by the terminal, and can be determined according to the ratio of the difference between the actual position information of the last moment of the terminal and the actual position information of the current moment and the difference between the current moment and the last moment.
In the above example, when the server 1 determines that the terminal is in the high-speed moving scene, the moving speed of the terminal is determined based on the history position information and the actual position information of the terminal. And then, determining theoretical position information corresponding to the terminal at the switching moment according to the moving speed of the terminal and the difference value between the switching moment and the current moment. The server 1 determines that the terminal is in a low-speed moving scene, and obtains a moving model of the terminal by counting historical position information of the terminal in a preset time period, such as 3 months, and performing model training on the historical position information in 3 months. The mobile model contains the position information corresponding to the terminal at each moment. Then, the actual position information of the terminal at the current moment is input into the movement model to determine the initial position of the terminal. Further, after the switching time is set to the movement model, the server 1 may predict theoretical position information corresponding to the terminal at the switching time. In other examples, when the server 1 determines that the terminal is in the high-speed moving scene, the historical position information of the terminal in a preset time period, such as the historical position information of the terminal in 3, is counted, and model training is performed on the historical position information in 3 months, so as to obtain a moving model of the terminal. The mobile model contains the position information corresponding to the terminal at each moment. Then, the actual position information of the terminal at the current moment is input into the movement model to determine the initial position of the terminal. Further, after the switching time is reached to the movement model, the server 1 can predict the theoretical position information corresponding to the terminal at the switching time. The server 1 determines that the terminal is in a low-speed moving scene, and determines the moving speed of the terminal according to the historical position information and the actual position information of the terminal. And then, determining theoretical position information corresponding to the terminal at the switching moment according to the moving speed of the terminal and the difference value between the switching moment and the current moment.
In particular, the theoretical network node may be the same as the actual network node, or may be different. Because the network node has a certain coverage area, the terminal needs to switch the attached theoretical network node in the moving process so as to ensure that the service of the terminal can normally run.
Illustratively, the server 1 determines the theoretical network node to which the theoretical location information belongs by determining whether the theoretical location information is within the coverage area of the theoretical network node. Such as: the theoretical network node is a base station, and the server 1 determines whether the theoretical position information is within the coverage area of the base station, thereby determining the base station to which the theoretical position information belongs. When the theoretical position information is within the coverage area of the base station 1, the server 1 determines that the base station to which the theoretical position information belongs is the base station 1.
S15, the server 1 determines at least one second MEC boundary node of the theoretical network node.
Specifically, the process of determining at least one second MEC boundary node of the theoretical network node by the server 1 is similar to the process of obtaining at least one first MEC boundary node of the actual network node where the MEC currently serving the terminal belongs by the server 1, and will not be described herein.
S16, the server 1 determines a target network node according to the historical position information and the actual position information of the terminal of at least one second MEC boundary node.
S17, the server 1 notifies the terminal to switch from the MEC of the current service to the MEC deployed at the target network node under the condition that the current time is equal to the switching time and the computing resource of the target network node is greater than or equal to the preset resource.
As can be seen from the foregoing, in the MEC switching method provided by the present invention, the server 1 obtains the actual location information of the terminal at the current time, and at least one first MEC border node of the actual network node where the MEC currently serving the terminal belongs to. The server 1 determines a target moment when the terminal leaves the actual network node based on the historical location information of the terminal, the at least one first MEC border node and the actual location information. The server 1 determines the switching moment of switching MEC according to the time required for switching MEC and the target moment. The server 1 determines theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal. The server 1 determines at least one second MEC border node of the theoretical network node. The server 1 determines the target network node based on the historical location information and the actual location information of the terminal for at least one second MEC border node. And under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is greater than or equal to the preset resource, notifying the terminal to switch from the MEC of the current service to the MEC deployed at the target network node. Therefore, the terminal can determine how to switch MEC in the moving process, and the problem of how to switch MEC in the moving process is solved.
In an implementation manner, in conjunction with fig. 2, as shown in fig. 3, the MEC switching method provided by the embodiment of the present invention further includes: S18-S20.
And S18, under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is smaller than the preset resource, the server 1 acquires at least one other network node meeting the preset condition. The preset condition comprises a network node with communication time delay smaller than or equal to a time delay threshold value and calculation resources larger than or equal to preset resources.
In particular, the computing resources include the computer's central processing unit (central processing unit, CPU) time, memory size, etc.
S19, the server 1 notifies the terminal to switch from the currently served MEC to the MEC deployed at the other network node, in case that the at least one other network node contains only one other network node.
And S20, the server 1 determines other network nodes with the smallest communication delay with the target network node in the plurality of other network nodes under the condition that at least one other network node comprises the plurality of other network nodes, and notifies the terminal to switch from the MEC of the current service to the MEC of the other network node with the smallest communication delay with the target network node in the plurality of other network nodes.
As can be seen from the above, in the MEC switching method provided by the present invention, when the computing resource of the target network node is smaller than the preset resource, it is indicated that the MEC cannot be deployed on the target network node. Therefore, the server 1 needs to reselect the network node where the MEC can be deployed, for which the server 1 obtains the network node whose communication latency with the target network node is less than or equal to the latency threshold and whose computing resource is greater than or equal to the preset resource. Further, the server 1 informs the terminal to switch from the currently served MEC to the MEC deployed at the other network node in case the at least one other network node contains only one other network node. In the case that the at least one other network node includes a plurality of other network nodes, the server 1 determines the other network node with the smallest communication delay with the target network node among the plurality of other network nodes, and notifies the terminal to switch from the MEC currently serving to the MEC deployed in the other network node with the smallest communication delay with the target network node among the plurality of other network nodes. Therefore, the terminal can determine how to switch MEC in the moving process, and the problem of how to switch MEC in the moving process is solved.
In one implementation manner, in conjunction with fig. 2, as shown in fig. 4, S12 may be specifically implemented by S120 and S121 described below.
S120, the server 1 determines the moving track of the terminal according to the historical position information and the actual position information of the terminal.
Specifically, the server 1 links the actual position information reported by the terminal, so as to determine the movement track and the movement direction of the terminal. As shown in (a) of fig. 5, assuming that the actual location information reported by the terminal at the current time is x5, the historical location information of the terminal stored on the server 1 includes x1, x2, x3 and x4. In this way, the server 1 links the position information according to the order of the reporting time of the position information, so that the movement track shown in (a) of fig. 5 can be obtained, and further, the movement direction of the terminal can be determined to be the movement direction a shown in fig. 5.
S121, the server 1 determines the target moment when the terminal leaves the actual network node according to at least one first MEC boundary node and the movement track.
Specifically, the server 1 determines the intersection point of the graph composed of at least one first MEC boundary node as the vertex and the movement trajectory. Then, the relative distance between the actual position information and the bit information corresponding to the intersection point is determined. Finally, the server 1 determines the target moment when the terminal leaves the actual network node according to the moving speed and the relative distance of the terminal.
Such as: in case that the at least one first MEC border node comprises only one MEC border node, such as network node B, as shown in fig. 5 (a), the server 1 draws a circle centering on the actual network node, such as network node a shown in fig. 5 (a), with the distance between the actual network node and the network node B as radius R, so that two intersection points of the movement track of the terminal and the circle, such as Px1 and Px2, can be determined. Since the terminal has passed the intersection Px1, the server 1 determines the relative distance of the actual position information and the bit information corresponding to the intersection Px1. Finally, the server 1 determines the target moment when the terminal leaves the network node a according to the moving speed and the relative distance of the terminal.
In the case where the at least one first MEC border node includes only two MEC border nodes (e.g., network node B and network node C), as shown in (B) of fig. 5, by connecting the network node B to the network node C, an intersection point, such as Px1, of the movement trace of the terminal and the line segment BC may be determined. The server 1 determines the relative distance between the actual position information and the bit information corresponding to the intersection Px1. Finally, the server 1 determines the target moment when the terminal leaves the network node a according to the moving speed and the relative distance of the terminal.
In the case that the at least one first MEC border node includes only three or more MEC border nodes (e.g., 3 network nodes, namely, network node B, network node C, and network node D), as shown in fig. 5 (C), the server 1 may determine the triangle BCD by using the network node B, the network node C, and the network node D as vertices, and thus may determine the intersection points of the movement trace of the terminal and the triangle BCD, such as Px1 and Px2. Since the terminal has passed the intersection Px1, the server 1 determines the relative distance of the actual position information and the bit information corresponding to the intersection Px 1. Finally, the server 1 determines the target moment when the terminal leaves the network node a according to the moving speed and the relative distance of the terminal.
In combination with the above example, the server 1 determines, according to the moving speed and the relative distance of the terminal, the target moment when the terminal leaves the network node a, including: the server 1 determines the movement time based on the ratio of the relative distance to the movement speed of the terminal. The server 1 determines the target moment when the terminal leaves the network node a according to the current moment and the movement time. Such as: the server 1 determines that the movement time is 10 minutes based on the ratio of the relative distance to the movement speed of the terminal. The server 1 determines that the current time is 11 points and 5 points, and the target time when the terminal leaves the network node a is 11 points and 15 points.
In one implementation manner, in connection with fig. 2, as shown in fig. 4, S13 may be specifically implemented by S130 described below.
S130, the server 1 determines the switching moment of switching MEC according to the difference value between the target moment and the time length required for switching MEC.
Specifically, assuming that the time required for switching the MEC is 5 minutes and the target time is 11 points and 15 minutes, the switching time is 11 points and 10 minutes.
In one implementation manner, as shown in fig. 4 in conjunction with fig. 2, S16 may be specifically implemented by S160 and S161 described below.
S160, the server 1 determines the moving track of the terminal according to the historical position information and the actual position information of the terminal.
Specifically, the process of determining the movement track of the terminal by the server 1 according to the historical position information and the actual position information of the terminal is similar to the process of determining the movement track of the terminal by the middle server 1 of S120 according to the historical position information and the actual position information of the terminal, which is not described herein.
S161, the server 1 determines that a junction point of a graph formed by using at least one second MEC boundary node as a vertex and a moving track is used as a target network node.
Specifically, the process of determining the intersection of the graph formed by using at least one second MEC boundary node as the vertex and the movement track by the server 1 is similar to the process of determining the intersection of the graph formed by using at least one first MEC boundary node as the vertex and the movement track by the server 1 according to at least one first MEC boundary node and the movement track in S121, and is not repeated here.
Specifically, the target network node is a theoretical network node to which the junction point which is not passed by the terminal belongs. Each intersection corresponds to one piece of location information, and the process of determining, by the server, the theoretical network node to which the intersection belongs according to the location information of the intersection is similar to the process of determining, by the server 1, the theoretical network node to which the intersection belongs according to the theoretical location information in S14, and is not described herein.
The foregoing description of the solution provided by the embodiments of the present invention has been mainly presented in terms of a method. To achieve the above functions, it includes corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The embodiment of the invention can divide the functional modules of the electronic device according to the method example, for example, each functional module can be divided corresponding to each function, and two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present invention, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.
Fig. 6 is a schematic structural diagram of an electronic device 10 according to an embodiment of the present invention. The electronic device 10 is configured to obtain actual location information of a terminal at a current time, and at least one first MEC border node of an actual network node where a MEC currently serving the terminal is located; determining a target moment when the terminal leaves the actual network node according to the historical position information of the terminal, the at least one first MEC boundary node and the actual position information; determining the switching time of switching MEC according to the time required by switching MEC and the target time; determining theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal; determining at least one second MEC border node of the theoretical network node; determining a target network node according to the historical position information and the actual position information of the terminal of the at least one second MEC boundary node; and under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is greater than or equal to the preset resource, notifying the terminal to switch from the MEC of the current service to the MEC deployed at the target network node. The electronic device 10 may include an acquisition unit 101, a processing unit 102, and a transmission unit 103.
An obtaining unit 101, configured to obtain actual location information at which the terminal is currently located, and at least one first MEC border node of an actual network node where the MEC currently serving the terminal is located. For example, in connection with fig. 2, the acquisition unit 101 may be used to perform S11. In connection with fig. 3, the acquisition unit 101 may be used to perform S18.
A processing unit 102, configured to determine a target time when the terminal leaves the actual network node according to the historical location information of the terminal, the at least one first MEC boundary node, and the actual location information; determining the switching time of switching MEC according to the time required by switching MEC and the target time; determining theoretical position information corresponding to the terminal at the switching time and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching time and the actual position information of the terminal; determining at least one second MEC border node of the theoretical network node; determining a target network node according to the historical position information and the actual position information of the terminal of the at least one second MEC boundary node; and under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is greater than or equal to the preset resource, notifying the terminal to switch from the MEC of the current service to the MEC deployed at the target network node. For example, in connection with fig. 2, the processing unit 102 may be used to perform S12, S13, S14, S15, S16 and S17. In connection with fig. 3, the processing unit 102 may be used to perform S19 and S20. In connection with fig. 4, the processing unit 102 may be configured to perform S120, S121, S130, S160, and S161.
And a sending unit 103, configured to notify the terminal to switch from the MEC currently served to the MEC deployed at the target network node. In connection with fig. 2, the transmitting unit 103 may be used to perform S17. In connection with fig. 3, the transmitting unit 103 may be used to perform S20.
All relevant contents of each step related to the above method embodiment may be cited to the functional descriptions of the corresponding functional modules, and their effects are not described herein.
Of course, the electronic device 10 provided in the embodiment of the present invention includes, but is not limited to, the above modules, for example, the electronic device 10 may further include the storage unit 104. The storage unit 104 may be used for storing program code of the write electronics 10, and may also be used for storing data generated by the write electronics 10 during operation, such as data in a write request, etc.
Fig. 7 is a schematic structural diagram of an electronic device 10 according to an embodiment of the present invention, as shown in fig. 7, the electronic device 10 may include: at least one processor 51, a memory 52, a communication interface 53 and a communication bus 54.
The following describes the respective constituent elements of the electronic device 10 in detail with reference to fig. 7:
the processor 51 is a control center of the electronic device 10, and may be one processor or a collective term of a plurality of processing elements. For example, processor 51 is a central processing unit (Central Processing Unit, CPU), but may also be an integrated circuit (Application Specific Integrated Circuit, ASIC), or one or more integrated circuits configured to implement embodiments of the present invention, such as: one or more DSPs, or one or more field programmable gate arrays (Field Programmable Gate Array, FPGAs).
In a particular implementation, processor 51 may include one or more CPUs, such as CPU0 and CPU1 shown in FIG. 7, as an example. Also, as one embodiment, the electronic device 10 may include multiple processors, such as the processor 51 and the processor 55 shown in FIG. 7. Each of these processors may be a Single-core processor (Single-CPU) or a Multi-core processor (Multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).
The Memory 52 may be, but is not limited to, a Read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, a random access Memory (Random Access Memory, RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), a compact disc (Compact Disc Read-Only Memory, CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory 52 may be stand alone and be coupled to the processor 51 via a communication bus 54. Memory 52 may also be integrated with processor 51.
In a specific implementation, the memory 52 is used to store data in the present invention and to execute software programs of the present invention. The processor 51 may perform various functions of the air conditioner by running or executing a software program stored in the memory 52 and calling data stored in the memory 52.
The communication interface 53 uses any transceiver-like means for communicating with other devices or communication networks, such as a radio access network (Radio Access Network, RAN), a wireless local area network (Wireless Local Area Networks, WLAN), a terminal, a cloud, etc. The communication interface 53 may include an acquisition unit implementing a reception function and a transmission unit implementing a transmission function.
The communication bus 54 may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component Interconnect, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The bus may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 7, but not only one bus or one type of bus.
As an example, in connection with fig. 6, the acquiring unit 101 and the transmitting unit 103 in the electronic device 10 realize the same functions as the communication interface 53 in fig. 7, the processing unit 102 realizes the same functions as the processor 51 in fig. 7, and the storage unit 104 realizes the same functions as the memory 52 in fig. 7.
Another embodiment of the present invention also provides a computer-readable storage medium having stored therein instructions which, when executed on a computer, cause the computer to perform the method shown in the above-described method embodiment.
In some embodiments, the disclosed methods may be implemented as computer program instructions encoded on a computer-readable storage medium in a machine-readable format or encoded on other non-transitory media or articles of manufacture.
Fig. 8 schematically illustrates a conceptual partial view of a computer program product comprising a computer program for executing a computer process on a computing device, provided by an embodiment of the invention.
In one embodiment, a computer program product is provided using signal bearing medium 410. The signal bearing medium 410 may include one or more program instructions that when executed by one or more processors may provide the functionality or portions of the functionality described above with respect to fig. 2. Thus, for example, referring to the embodiment shown in FIG. 2, one or more features of S11-S17 may be carried by one or more instructions associated with signal bearing medium 410. Further, the program instructions in fig. 8 also describe example instructions.
In some examples, signal bearing medium 410 may comprise a computer readable medium 411 such as, but not limited to, a hard disk drive, compact Disk (CD), digital Video Disk (DVD), digital tape, memory, read-only memory (ROM), or random access memory (random access memory, RAM), among others.
In some implementations, the signal bearing medium 410 may include a computer recordable medium 412 such as, but not limited to, memory, read/write (R/W) CD, R/W DVD, and the like.
In some implementations, the signal bearing medium 410 may include a communication medium 413 such as, but not limited to, a digital and/or analog communication medium (e.g., fiber optic cable, waveguide, wired communications link, wireless communications link, etc.).
The signal bearing medium 410 may be conveyed by a communication medium 413 in wireless form (e.g., a wireless communication medium conforming to the IEEE802.41 standard or other transmission protocol). The one or more program instructions may be, for example, computer-executable instructions or logic-implemented instructions.
In some examples, a data-writing apparatus such as described with respect to fig. 2 may be configured to provide various operations, functions, or actions in response to program instructions through one or more of computer-readable medium 411, computer-recordable medium 412, and/or communication medium 413.
From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another apparatus, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and the parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a readable storage medium. Based on such understanding, the technical solution of the embodiments of the present invention may be essentially or a part contributing to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium, including several instructions for causing a device (may be a single-chip microcomputer, a chip or the like) or a processor (processor) to perform all or part of the steps of the method described in the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk, etc.
The foregoing is merely illustrative of specific embodiments of the present invention, and the scope of the present invention is not limited thereto, but any changes or substitutions within the technical scope of the present invention should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A MEC switching method, comprising:
acquiring actual position information of a terminal at the current moment and at least one first MEC boundary node of an actual network node of an MEC currently serving the terminal;
determining a target moment when the terminal leaves the actual network node according to the historical position information of the terminal, the moving speed of the terminal, the at least one first MEC boundary node and the actual position information; the moving speed can be obtained through MR data reported by the terminal, and can also be determined according to the ratio of the difference between the actual position information of the last moment of the terminal and the actual position information of the current moment and the difference between the current moment and the last moment;
determining the switching time for switching MEC according to the time required for switching MEC and the target time;
Determining theoretical position information corresponding to the terminal at the switching moment and theoretical network nodes to which the theoretical position information belongs according to the historical position information, the switching moment and the actual position information of the terminal;
determining at least one second MEC border node of the theoretical network node;
determining a target network node according to the historical position information and the actual position information of the terminal of the at least one second MEC boundary node;
when the current time is equal to the switching time and the computing resource of the target network node is greater than or equal to a preset resource, notifying the terminal to switch from the currently served MEC to the MEC deployed at the target network node;
acquiring at least one other network node meeting a preset condition under the condition that the current moment is equal to the switching moment and the computing resource of the target network node is smaller than a preset resource; the method comprises the steps that a preset condition comprises a network node, wherein the communication time delay between the network node and a target network node is smaller than or equal to a time delay threshold value, and the computing resource is larger than or equal to a preset resource;
in case the at least one other network node comprises only one other network node, notifying the terminal to switch from the currently serving MEC to the MEC deployed at the other network node;
And in the case that the at least one other network node comprises a plurality of other network nodes, determining the other network node with the smallest communication delay with the target network node in the plurality of other network nodes, and notifying the terminal to switch from the currently served MEC to the MEC deployed in the other network node with the smallest communication delay with the target network node in the plurality of other network nodes.
2. The MEC switching method according to claim 1, wherein said determining a target time when the terminal leaves the actual network node based on the historical location information of the terminal and the actual location information of the at least one first MEC border node comprises:
determining a moving track of the terminal according to the historical position information and the actual position information of the terminal;
and determining the target moment when the terminal leaves the actual network node according to the at least one first MEC boundary node and the movement track.
3. The MEC switching method according to claim 1, wherein determining a switching time to switch the MEC according to a time period required to switch the MEC and the target time includes:
And determining the switching moment of switching MEC according to the difference value between the target moment and the time length required for switching the MEC.
4. The MEC switching method according to claim 1, wherein said determining a target network node from the historical location information of the terminal and the actual location information of the at least one second MEC border node comprises:
determining a moving track of the terminal according to the historical position information and the actual position information of the terminal;
and determining an intersection point of the graph formed by taking the at least one second MEC boundary node as a vertex and the moving track as the target network node.
5. A MEC switching apparatus, comprising:
the terminal comprises an acquisition unit, a processing unit and a processing unit, wherein the acquisition unit is used for acquiring actual position information of a terminal at the current moment and at least one first MEC boundary node of an actual network node where an MEC serving the terminal currently belongs;
the processing unit is used for determining the target moment when the terminal leaves the actual network node according to the historical position information of the terminal, the moving speed of the terminal, the at least one first MEC boundary node acquired by the acquisition unit and the actual position information acquired by the acquisition unit; the moving speed can be obtained through MR data reported by the terminal, and can also be determined according to the ratio of the difference between the actual position information of the last moment of the terminal and the actual position information of the current moment and the difference between the current moment and the last moment;
The processing unit is further configured to determine a switching time for switching the MEC according to a duration required for switching the MEC and the target time;
the processing unit is further configured to determine theoretical position information corresponding to the terminal at the switching time and a theoretical network node to which the theoretical position information belongs according to the historical position information of the terminal, the switching time and the actual position information acquired by the acquiring unit;
the processing unit is further configured to determine at least one second MEC border node of the theoretical network node;
the processing unit is further configured to determine a target network node according to the at least one second MEC boundary node, the historical location information of the terminal, and the actual location information acquired by the acquiring unit;
the processing unit is further configured to, when the current time is equal to the switching time and the computing resource of the target network node is greater than or equal to a preset resource, control the sending unit to notify the terminal to switch from the currently served MEC to the MEC deployed at the target network node;
the obtaining unit is further configured to obtain at least one other network node that meets a preset condition when the current time is equal to the switching time and the computing resource of the target network node is smaller than a preset resource; the method comprises the steps that a preset condition comprises a network node, wherein the communication time delay between the network node and a target network node is smaller than or equal to a time delay threshold value, and the computing resource is larger than or equal to a preset resource;
The processing unit is further configured to notify the terminal to switch from the currently served MEC to the MEC deployed at the other network node, if the at least one other network node acquired by the acquiring unit includes only one other network node;
the processing unit is further configured to determine, when the at least one other network node acquired by the acquiring unit includes a plurality of other network nodes, the other network node with the smallest communication delay with the target network node among the plurality of other network nodes, and control the sending unit to notify the terminal that the MEC of the other network node with the smallest communication delay with the target network node deployed among the plurality of other network nodes is switched from the MEC of the current service.
6. The MEC switching apparatus according to claim 5, wherein the processing unit is specifically configured to determine a movement track of the terminal according to the historical position information of the terminal and the actual position information acquired by the acquiring unit;
the processing unit is specifically configured to determine, according to the at least one first MEC boundary node and the movement track, a target time when the terminal leaves the actual network node.
7. The MEC switching device according to claim 5, wherein the processing unit is specifically configured to determine a switching time for switching the MEC according to a difference between the target time and a time period required for switching the MEC.
8. The MEC switching apparatus according to claim 5, wherein the processing unit is specifically configured to determine a movement track of the terminal according to the historical position information of the terminal and the actual position information acquired by the acquiring unit;
the processing unit is specifically configured to determine, as the target network node, a junction of the moving track and a graph formed by using the at least one second MEC boundary node as a vertex.
9. An electronic device, comprising: communication interface, processor, memory, bus;
the memory is used for storing computer execution instructions, and the processor is connected with the memory through the bus;
when the electronic device is running, the processor executes the computer-executable instructions stored in the memory to cause the electronic device to perform the MEC switching method of any one of the preceding claims 1-4.
10. A computer readable storage medium, characterized in that instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform the MEC switching method of any of the preceding claims 1-4.
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