CN112214258A - End-to-end capability benchmark test method and device based on software defined wide area network - Google Patents
End-to-end capability benchmark test method and device based on software defined wide area network Download PDFInfo
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- CN112214258A CN112214258A CN202011116499.4A CN202011116499A CN112214258A CN 112214258 A CN112214258 A CN 112214258A CN 202011116499 A CN202011116499 A CN 202011116499A CN 112214258 A CN112214258 A CN 112214258A
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- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
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Abstract
The application provides an end-to-end capability benchmark test method and device based on a software defined wide area network, wherein the method comprises the following steps: clearing the existing configuration on the edge equipment; configuring a management interface on an edge device to cause the edge device to be managed by an SD-WAN controller; establishing a management link between the testing device and the edge device; closing the edge device; issuing a starting instruction to an SD-WAN controller to enable the SD-WAN controller to start the edge device through a management interface based on a zero configuration template; determining whether the edge device is normally started through a management link established with the edge device. The method can standardize the capability test verification of the edge equipment on the premise of avoiding customization and sealing.
Description
Technical Field
The invention relates to the technical field of network testing, in particular to an end-to-end capability benchmark testing method and device based on a software defined wide area network.
Background
The software defined wide area network (SD-WAN) is linked with the development of each part of the industry in the aspects of enabling AI, optimizing industrial Internet, promoting cloud network fusion, accelerating 5G commercial deployment and the like, and forms wide and deep industry influence. By realizing floor deployment in a plurality of scenes such as finance, new retail, distance education, intelligent medical treatment, industrial internet and the like, the SD-WAN becomes a hot direction for ICT industry development at present, and a closed industry ecology covering basic telecommunication service providers, cloud service providers, virtual service providers, equipment manufacturing/scheme providers, end users and the like is formed.
Under the influence of scene application, at the present stage, a tester carries out test evaluation on the network service capability of the SD-WAN, the actual deployment requirement of a service scene needs to be comprehensively considered in the test process, the test verification method is highly coupled with service logic, and the service test load needs to be realized by means of real service; on the other hand, the scene customized test method is also difficult to adapt to the test deployment requirements of other industries, which means a great amount of repeated test evaluation work for both the supply and demand sides of the SD-WAN network service, and therefore, the end-to-end test evaluation work based on the SD-WAN faces the technical problems of customization and sealing.
Disclosure of Invention
In view of this, the present application provides an end-to-end capability benchmark testing method and apparatus based on a software-defined wide area network, which can standardize the capability test verification of the edge device on the premise of avoiding customization and closure.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
in one embodiment, an end-to-end capability benchmark method based on a software defined wide area network is provided, and is characterized in that the method comprises the following steps:
clearing the existing configuration on the edge equipment;
configuring a management interface on an edge device to cause the edge device to be managed by an SD-WAN controller;
establishing a management link between the testing device and the edge device;
closing the edge device;
issuing a starting instruction to an SD-WAN controller to enable the SD-WAN controller to start the edge device through a management interface based on a zero configuration template;
determining whether the edge device is normally started through a management link established with the edge device.
In another embodiment, there is provided an end-to-end capability benchmarking apparatus for a software defined wide area network, the apparatus comprising: a strategy unit and a monitoring unit;
the policy unit is used for clearing the existing configuration on the edge device; configuring a management interface on an edge device to cause the edge device to be managed by an SD-WAN controller; establishing a management link with the edge device; and closing the edge device; issuing a starting instruction to an SD-WAN controller to enable the SD-WAN controller to start the edge device through a management interface based on a zero configuration template;
and the monitoring unit is used for determining whether the edge equipment is normally started or not through a management link established with the edge equipment.
In another embodiment, an electronic device is provided that includes a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the software-defined wide area network-based end-to-end capability benchmarking method when executing the program.
In another embodiment, a computer readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, performs the steps of the software defined wide area network based end-to-end capability benchmarking method.
According to the technical scheme, the controller is controlled to issue the zero configuration template to the end-to-end edge equipment to be tested, the starting test is carried out under the condition that the end-to-end edge equipment is not configured, and the capability test verification of the edge equipment can be standardized on the premise of avoiding customization and sealing.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to an embodiment of the present application;
FIG. 2 is a flowchart illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to a second embodiment of the present application;
fig. 3 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to a third embodiment of the present application;
fig. 4 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to a fourth embodiment of the present application;
fig. 5 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to a fifth embodiment of the present application;
FIG. 6 is a schematic diagram illustrating an end-to-end capability benchmarking network architecture based on a software-defined wide area network according to an embodiment of the present application;
FIG. 7 is a schematic diagram of an apparatus for implementing the above technique in an embodiment of the present application;
fig. 8 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus.
The technical solution of the present invention will be described in detail with specific examples. Several of the following embodiments may be combined with each other and some details of the same or similar concepts or processes may not be repeated in some embodiments.
The embodiment of the application provides an end-to-end capability benchmark test method based on a software-defined wide area network, which is realized by a test device, wherein the test device can be deployed on one piece of equipment or multiple pieces of equipment.
End-to-end herein refers to edge device.
In specific implementation, when the test device performs testing, the test terminal and the controller may be simulated, that is, the test terminal and the controller may be used as a part of the test device, or an existing test terminal and an existing controller may be used for auxiliary testing.
Example one
The present embodiment tests whether the first edge device and the second edge device can be booted by the SD-WAN controller in a contactless, zero configuration.
Before testing, the following operations need to be performed:
first, existing configuration on the edge device is cleared.
In a specific implementation, if there is no configuration on the edge device, the operation may not be executed; if existing configurations exist, the method for clearing the existing configurations is not limited in the embodiment of the present application, and the clearing may be performed by using a certain tool, or may be manually cleared.
And secondly, configuring a management interface on the edge device to enable the edge device to be managed by the SD-WAN controller.
And configuring a management interface on the edge device to enable the edge device to be managed by the SD-WAN controller, namely, interacting with the SD-WAN controller through the management interface to execute the request sent by the SD-WAN controller.
And thirdly, a management link between the testing device and the edge device can be established for inquiring the state of the edge device.
And fourthly, closing the edge device.
Because the start test is performed, it is ensured that the edge devices are all in a shutdown and offline state before the test.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to an embodiment of the present application. The method comprises the following specific steps:
The method comprises the steps that when an SD-WAN controller receives a starting instruction, whether the instruction carries a zero configuration template or not is determined, and if the instruction carries the zero configuration template, edge equipment is started based on the zero configuration template carried in the instruction; otherwise, the edge device is started based on the local default zero configuration template.
The content of the zero configuration template configuration herein includes, but is not limited to, the following:
the IP address of a data plane port, the IP address of a control channel, a minimum flow table for data plane forwarding (ARP data flow sends the control channel up; flooding data flow sent down by the control channel is forwarded to all data ports), a simplest matching strategy of equipment (unknown data flow sends all controllers up), and a minimum data plane forwarding strategy (such as minimum delay, minimum hop count and the like).
The controller is controlled to issue a zero configuration template to the end-to-end edge equipment to be tested, the start test is carried out under the condition that the end-to-end edge equipment is not configured, and the capability test verification of the edge equipment can be standardized on the premise of avoiding customization and sealing.
Example two
In this embodiment, it is tested whether the specified link can be correctly established between the two edge devices and whether the traffic can be forwarded through the high-quality link.
The following configuration is required before the test is performed:
the generation and initialization of the access account pair are specifically as follows:
generating and distributing an access account: an access account pair is generated and initialized for test terminals (a first test terminal and a second test terminal) accessing two edge devices to be tested. The number of the generated and allocated access account pairs is not limited, and may be one pair or multiple pairs, where two pairs are taken as an example: the first pair is Key-1 and Key-3, and the second pair is Key-2 and Key-4; key-1 and Key-2 can be assigned to one test terminal and Key-3 and Key-4 to another test terminal.
The foregoing allocation of the access account pairs is merely an example, and this is not limited in this embodiment of the application.
Since the existing test terminal is taken as an example, a management link needs to be established between the test apparatus and the test terminal in order to control the test terminal.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to a second embodiment of the present application. The method comprises the following specific steps:
The testing device issues a link establishment command to the controller, so that the controller issues a link establishment rule to the edge device to establish two links with different qualities.
The link establishment rule may be pre-stored in the controller, or may be carried when a link establishment command is sent to the controller.
The link establishment rule is to establish two links with different link qualities between two edge devices, and when the specific rule is implemented, the link quality of one link can be reduced through a damage mode so as to establish two links with different link qualities.
The above-mentioned manner for establishing two links with different link qualities is only an example, and is not limited to the above-mentioned link establishment manner.
The testing terminal is accessed to the software defined wide area network through the edge device.
If the edge device is determined to receive the flow sent by the test terminal accessed to the edge device of the opposite end through the high-quality link and successfully forwards the flow to the next test terminal, the established link is determined to be capable of forwarding the flow, and when a plurality of links exist, the high-quality link can be selected for forwarding the flow.
In a specific implementation, a forwarding link may be determined according to a port receiving traffic, and may also determine which link is used for forwarding traffic according to a time used for forwarding traffic.
EXAMPLE III
The embodiment is used for verifying whether end-to-end forwarding can be performed according to the specified link for different types of application traffic.
And establishing a high-speed special line link and an Internet special line link between the two edge devices.
The high-rate dedicated link and the Internet dedicated link may use two links with different qualities, which are established in the second embodiment, where the high-quality link is used as the high-rate dedicated link, the low-quality link is used as the Internet dedicated link, and the two links may also be re-established to be used as the high-rate dedicated link and the Internet dedicated link, respectively, which is not limited in the embodiment of the present application.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to a third embodiment of the present application. The method comprises the following specific steps:
In specific implementation, a pre-configured service identification template can be carried in the instruction; or initializing a pre-configured service identification template on the SD-WAN controller in advance, and issuing the pre-configured service identification template to the edge device when various types of application flow tests are required.
If the identification template configuration content is pre-configured, the identification template configuration content can be: video application flow, office OA flow, voice flow are required to go high-rate special link, mail application flow, file sharing flow goes Internet special link, and the like.
The edge device stores the pre-configured service identification template when receiving the pre-configured service identification template, and identifies a link to be forwarded according to the type of the application flow when receiving the application flow.
When the edge device receives the application flow, the type of the application flow is determined, and a link for forwarding the application flow is determined according to a pre-configured service identification template.
The plurality of types of application flows include any combination of the following:
video application stream, mail application stream, file sharing stream, office OA stream, voice stream.
Among them, the video application stream, such as RSTP protocol data stream;
mail application flow, such as SMTP protocol flow;
file sharing streams, such as NetBIOS protocol data streams;
office OA streams, such as HTTP streams;
voice streams, such as SIP protocol data streams.
Example four
The embodiment is used for testing whether the edge device can perform end-to-end forwarding forbidding processing on the specified traffic.
Referring to fig. 4, fig. 4 is a schematic diagram illustrating an end-to-end capability benchmark test based on a software-defined wide area network according to a fourth embodiment of the present application. The method comprises the following specific steps:
The flow forbidding template can be configured in the SD-WAN controller in advance; or the instruction can be carried in the instruction and sent to the SD-WAN controller.
An application flow type, such as an office OA flow, to be prohibited from forwarding is specified in the traffic prohibition template.
When the edge device receives the application flow, firstly determining whether the flow is the flow appointed in the flow forbidding template, if so, forbidding forwarding; otherwise, forwarding according to the forwarding strategy.
The embodiment tests whether the end-to-end edge device can prohibit forwarding the traffic specified in the traffic prohibition template, and the same test is performed for all the edge devices.
EXAMPLE five
The embodiment is used for testing whether the data channel forwarding service flow is influenced by the control channel.
Referring to fig. 5, fig. 5 is a schematic diagram of an end-to-end capability benchmark test based on a software defined wide area network according to a fifth embodiment of the present application. The method comprises the following specific steps:
If the data stream is normally sent and received on the edge device after the control channel is closed, it indicates that the data forwarding between end-to-end is not affected by the control channel and the data forwarding performance between end-to-end is normal.
EXAMPLE six
Referring to fig. 6, fig. 6 is a schematic diagram of an end-to-end capability benchmark network architecture based on a software-defined wide area network according to an embodiment of the present application. The network architecture in fig. 6 is suitable for the specific tests of the second to fifth embodiments. In fig. 6, the test terminal is taken as an example and does not belong to a part of the test apparatus. The first test terminal is accessed to the benchmark test network through the first edge device, and the second test terminal is accessed to the benchmark test network through the second edge device. Two links with different qualities are established between the first edge device and the second edge device by adding the damage module, one link without the damage module is used as a high-speed special line link, and the other link with the damage module is added as an Internet special line link.
Management links are established between the testing device and the edge equipment and between the testing terminals, and are used for controlling and monitoring the edge equipment and the testing terminals to complete end-to-end capability benchmark testing.
The scheme can effectively avoid the locking of a service scene, can effectively carry out benchmark test evaluation on an end-to-end SD-WAN solution in the aspects of service flow simulation, transmission link abstraction, main function, safety and reliability verification and the like, and effectively solves the technical problems of customization, sealing and the like.
Based on the same inventive concept, the embodiment of the application also provides an end-to-end capability benchmark testing device based on the software defined wide area network. Referring to fig. 7, fig. 7 is a schematic structural diagram of an apparatus applied to the above technology in the embodiment of the present application. The device comprises: a policy unit 701 and a monitoring unit 702;
a policy unit 701, configured to clear an existing configuration on an edge device; configuring a management interface on an edge device to cause the edge device to be managed by an SD-WAN controller; establishing a management link with the edge device; and closing the edge device; issuing a starting instruction to an SD-WAN controller to enable the SD-WAN controller to start the edge device through a management interface based on a zero configuration template;
a monitoring unit 702, configured to determine whether the edge device is normally started through a management link established with the edge device.
Preferably, the first and second electrodes are formed of a metal,
a policy unit 701, further configured to initialize an access account on the test terminal; controlling the SD-WAN controller to issue a link establishment rule to edge equipment corresponding to the tested end to end, so that two links with different link qualities are established between the edge equipment; sending flow to a test terminal accessed to opposite-end edge equipment by using an initialized access account through the test terminal accessed to the edge equipment;
a monitoring unit 702, configured to send an inquiry request to an edge device that is accessed by a test terminal that receives the traffic; and determining whether the edge device transmits the traffic through a link with high quality according to the inquired forwarding path of the data stream.
Preferably, the first and second electrodes are formed of a metal,
a policy unit 701, configured to send an instruction to an SD-WAN controller, so that the SD-WAN controller issues a preconfigured service identification template to an end-to-end corresponding edge device to be tested; sending various types of application flows to a test terminal accessed to opposite-end edge equipment through the test terminal accessed to the edge equipment;
a monitoring unit 702, configured to monitor a forwarding path for the edge device to forward the multiple types of application flows, and determine whether the multiple types of application flows are forwarded according to a link specified by a preset configuration service identification template.
Preferably, the plurality of types of application traffic comprise any combination of the following:
video application traffic, mail application traffic, file sharing traffic, office OA traffic, voice traffic.
Preferably, the first and second electrodes are formed of a metal,
the decision unit is used for sending a command of issuing a flow prohibition template to the SD-WAN controller so that the SD-WAN controller issues the flow prohibition template to the edge device; sending the flow which is appointed to be forbidden to be forwarded in the forbidden template through a test terminal which is accessed to the edge equipment;
a monitoring unit 702, configured to monitor whether the edge device forwards the received traffic, and determine whether the edge device can prohibit forwarding the application traffic prohibited by the traffic prohibition template.
Preferably, the first and second electrodes are formed of a metal,
the decision unit is used for sending a control channel disconnection instruction to the SD-WAN controller so that the SD-WAN controller disconnects a control channel with the edge device; initiating a data flow through a test terminal accessed to the edge device;
a monitoring unit 702, further configured to monitor whether the edge device forwards the data stream normally, and whether an opposite edge device of the edge device receives the data stream normally.
The units of the above embodiments may be integrated into one body, or may be separately deployed; may be combined into one unit or further divided into a plurality of sub-units.
In another embodiment, an electronic device is also provided, which includes a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the software-defined wide area network-based end-to-end capability benchmarking method when executing the program.
In another embodiment, a computer readable storage medium is also provided having stored thereon computer instructions that, when executed by a processor, perform the steps of the software-defined wide area network-based end-to-end capability benchmarking method.
Fig. 8 is a schematic physical structure diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 8, the electronic device may include: a Processor (Processor)810, a communication Interface 820, a Memory 830 and a communication bus 840, wherein the Processor 810, the communication Interface 820 and the Memory 830 communicate with each other via the communication bus 840. The processor 810 may call logic instructions in the memory 830 to perform the following method:
clearing the existing configuration on the edge equipment;
configuring a management interface on an edge device to cause the edge device to be managed by an SD-WAN controller;
establishing a management link between the testing device and the edge device;
closing the edge device;
issuing a starting instruction to an SD-WAN controller to enable the SD-WAN controller to start the edge device through a management interface based on a zero configuration template;
determining whether the edge device is normally started through a management link established with the edge device.
In addition, the logic instructions in the memory 830 may be implemented in software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An end-to-end capability benchmark testing method based on a software defined wide area network (SD-WAN), which is characterized by comprising the following steps:
clearing the existing configuration on the edge equipment;
configuring a management interface on an edge device to cause the edge device to be managed by an SD-WAN controller;
establishing a management link between the testing device and the edge device;
closing the edge device;
issuing a starting instruction to an SD-WAN controller to enable the SD-WAN controller to start the edge device through a management interface based on a zero configuration template;
determining whether the edge device is normally started through a management link established with the edge device.
2. The method according to claim 1, characterized in that it comprises: initializing an access account on a test terminal;
controlling the SD-WAN controller to issue a link establishment rule to edge equipment corresponding to the tested end to end, so that two links with different link qualities are established between the edge equipment;
sending flow to a test terminal accessed to opposite-end edge equipment by using an initialized access account through the test terminal accessed to the edge equipment;
sending a query request to the edge equipment accessed by the test terminal receiving the flow;
and determining whether the edge device transmits the traffic through a link with high quality according to the inquired forwarding path of the data stream.
3. The method of claim 1, further comprising:
sending an instruction to an SD-WAN controller to enable the SD-WAN controller to issue a pre-configured service identification template to edge equipment to be tested, wherein the edge equipment corresponds to an end-to-end mode;
sending various types of application flows to a test terminal accessed to opposite-end edge equipment through the test terminal accessed to the edge equipment;
and monitoring a forwarding path of the edge device for forwarding the multiple types of application flows, and determining whether the multiple types of application flows are forwarded according to a link specified by a preset configuration service identification template.
4. The method of claim 3, wherein the plurality of types of application traffic comprises any combination of:
video application traffic, mail application traffic, file sharing traffic, office OA traffic, voice traffic.
5. The method of claim 1, further comprising:
sending a command of issuing a flow prohibition template to an SD-WAN controller, so that the SD-WAN controller issues the flow prohibition template to the edge device;
sending the flow which is appointed to be forbidden to be forwarded in the forbidden template through a test terminal which is accessed to the edge equipment;
monitoring whether the edge device forwards the received traffic, and determining whether the edge device can forbid forwarding the application traffic prohibited by the traffic prohibition template.
6. The method according to any one of claims 1-5, wherein the method further comprises:
sending a control channel disconnection instruction to an SD-WAN controller to enable the SD-WAN controller to disconnect a control channel with an edge device;
initiating a data flow through a test terminal accessed to the edge device;
and monitoring whether the data stream is normally forwarded by the edge device and whether the data stream is normally received by the edge device at the opposite end of the edge device.
7. An end-to-end capability benchmarking apparatus based on a software defined wide area network, the apparatus comprising: a strategy unit and a monitoring unit;
the policy unit is used for clearing the existing configuration on the edge device; configuring a management interface on an edge device to cause the edge device to be managed by an SD-WAN controller; establishing a management link with the edge device; and closing the edge device; issuing a starting instruction to an SD-WAN controller to enable the SD-WAN controller to start the edge device through a management interface based on a zero configuration template;
and the monitoring unit is used for determining whether the edge equipment is normally started or not through a management link established with the edge equipment.
8. The apparatus of claim 7,
the policy unit is further used for initializing an access account on the test terminal; controlling the SD-WAN controller to issue a link establishment rule to edge equipment corresponding to the tested end to end, so that two links with different link qualities are established between the edge equipment; sending flow to a test terminal accessed to opposite-end edge equipment by using an initialized access account through the test terminal accessed to the edge equipment;
the monitoring unit is used for sending a query request to the edge equipment accessed by the test terminal for receiving the flow; and determining whether the edge device transmits the traffic through a link with high quality according to the inquired forwarding path of the data stream.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1-6 when executing the program.
10. A computer-readable storage medium, on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the method of any one of claims 1 to 6.
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