CN117081673A - Multi-level mapping table interrupt source optical fiber data transmission method and device - Google Patents

Abstract

The invention provides a method and a device for transmitting interruption source optical fiber data of a multistage mapping table, which relate to the technical field of data processing, and the method comprises the following steps: according to the address, traversing items in a first-level mapping table in the multi-level mapping table one by one in sequence to obtain matching items, and if the matching items are not obtained, traversing a next-level mapping table one by one in sequence until the matching items are obtained or traversing all mapping tables; if the matching item is obtained, generating an interrupt source of a corresponding level according to the traversal history and the level of the matching item in the mapping table; the multi-level mapping table comprises at least one group of data areas, and each group of data areas comprises at least one address and at least one length; and acquiring the level and the type of the interrupt source according to the interrupt source, and executing a corresponding interrupt processing instruction according to the level and the type of the interrupt source. The invention can effectively analyze data, quickly find the matching item in the multi-stage mapping table and timely generate the interrupt source of the corresponding stage.

Description

A multi-level mapping table interrupt source optical fiber data transmission method and device

Technical field

The invention relates to the field of data processing technology, and in particular, to a multi-level mapping table interrupt source optical fiber data transmission method and device.

Background technique

In optical fiber data transmission, due to the large amount of data and fast transmission speed, how to effectively process the data to meet real-time requirements is a major challenge faced by current technology.

In particular, when the data transmission reaches this node, the data needs to be parsed to obtain the address corresponding to the data, and then the matching item is searched in the multi-level mapping table based on the address to generate an interrupt source of the corresponding level, and the interrupt source is generated according to the level of the interrupt source. and execute corresponding interrupt processing instructions. However, existing data processing methods often have problems such as low efficiency and poor real-time performance.

Contents of the invention

The technical problem to be solved by the present invention is to provide a multi-level mapping table interrupt source optical fiber data transmission method and device, which can effectively analyze data, quickly find matching items in the multi-level mapping table, and generate corresponding level interrupt sources in a timely manner. , and execute corresponding interrupt processing instructions according to the level and type of the interrupt source, thereby improving the efficiency and real-time performance of data processing.

In order to solve the above technical problems, the technical solutions of the present invention are as follows:

In the first aspect, a multi-level mapping table interrupt source optical fiber data transmission method, the method includes:

Obtain data transmitted to this node through optical fiber;

Parse the data and obtain the address corresponding to the data;

According to the address, the items in the first-level mapping table in the multi-level mapping table are traversed one by one in order to obtain a matching item. If the matching item is not obtained, the next-level mapping table is traversed in order one by one until a matching item is obtained. Or traverse all mapping tables; if the matching item is obtained, an interrupt source of the corresponding level is generated according to the traversal history and the level of the matching item in the mapping table; the multi-level mapping table includes at least one group of data areas, each group of data The area includes at least one address and length;

According to the interrupt source, the level and type of the interrupt source are obtained, and corresponding interrupt processing instructions are executed according to the level and type of the interrupt source.

Further, obtain the data transmitted to this node through optical fiber, including:

Get the number M of data areas and the number of addresses N contained in each data area;

Allocate required storage space to each data area to store at least one address and length information corresponding to each address;

According to the numerical size of the storage address, a fixed storage location is allocated in each data area for each address and the corresponding length of each address to form a multi-level mapping table with a length of N.

Further, the length information includes the start position, the end position of the address, and the length of the continuous address area from the start position to the end position.

Further, allocate required storage space for each data area to store at least one address and length information corresponding to each address, including:

Obtain the storage space required for each piece of address information and length information;

According to the required storage space, allocate corresponding storage space to each data area;

In the allocated storage space, the corresponding length information is stored for each address.

Further, according to the address, the items in the first-level mapping table in the multi-level mapping table are traversed one by one in order to obtain a matching item. If the matching item is not obtained, the next-level mapping table is traversed in order one by one until Get a match or iterate through all mapping tables, including:

Traverse the entire metadata table or status table in sequence to obtain the status of each data area;

If the status of the first data area is idle or partially occupied, new data is written into the first data area and jumps to the next data area;

If the status of the first data area is displayed as occupied, the first data area is skipped and the next data area is continued to be traversed.

Further, according to the interrupt source, obtain the level and type of the interrupt source, and execute corresponding interrupt processing instructions according to the level and type of the interrupt source, including:

Traverse the mapping table again to find the storage area corresponding to the data and obtain the physical address of the storage area;

Access the physical address, read the required data or write the data to the target address according to the length and format of the storage area;

Return the read data to the requester, or update the mapping table after writing the data to the target address.

Further, after obtaining the level and type of the interrupt source according to the interrupt source, and executing the corresponding interrupt processing instructions according to the level and type of the interrupt source, it also includes:

Set priority for each interrupt source and mapping item;

Sort according to the priority of interrupt sources and mapping items to obtain a list of interrupt sources and mapping items in order from high to low priority;

Select interrupt sources or mapping items one by one from the sorted list for processing.

In the second aspect, a multi-level mapping table interrupt source optical fiber data transmission device includes:

The acquisition module is used to acquire the data transmitted to the node through optical fiber; parse the data to obtain the address corresponding to the data;

A processing module configured to traverse the items in the first-level mapping table in the multi-level mapping table one by one in sequence according to the address to obtain a matching item; if the matching item is not obtained, traverse the next-level mapping table one by one in order. , until a matching item is obtained or all mapping tables are traversed; if the matching item is obtained, an interrupt source of the corresponding level is generated according to the traversal history and the level of the matching item in the mapping table; the multi-level mapping table includes at least one set of data area, each group of data areas includes at least one address and length; according to the interrupt source, the level and type of the interrupt source are obtained, and corresponding interrupt processing instructions are executed according to the level and type of the interrupt source.

In a third aspect, a computing device includes:

one or more processors;

A storage device is used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the above method.

A fourth aspect is a computer-readable storage medium. The computer-readable storage medium stores a program. When the program is executed by a processor, the above method is implemented.

The above solution of the present invention at least includes the following beneficial effects:

The above solution of the present invention can effectively parse data, quickly find matching items in multi-level mapping tables, promptly generate interrupt sources of corresponding levels, and execute corresponding interrupt processing instructions according to the level and type of interrupt sources, thereby improving Efficiency and real-time performance of data processing. In addition, this method should also be able to effectively construct and use multi-level mapping tables to improve the storage efficiency of data addresses and lengths.

Description of the drawings

Figure 1 is a schematic flowchart of a multi-level mapping table interrupt source optical fiber data transmission method provided by an embodiment of the present invention.

Figure 2 is a schematic diagram of a multi-level mapping table interrupt source optical fiber data transmission device provided by an embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a thorough understanding of the disclosure, and to fully convey the scope of the disclosure to those skilled in the art.

As shown in Figure 1, an embodiment of the present invention proposes a multi-level mapping table interrupt source optical fiber data transmission method. The method includes:

Step 11, obtain the data transmitted to this node through optical fiber;

Step 12: Analyze the data and obtain the address corresponding to the data;

Step 13: According to the address, traverse the items in the first-level mapping table in the multi-level mapping table one by one in order to obtain the matching item. If the matching item is not obtained, traverse the next-level mapping table one by one in order until Obtain matching items or traverse all mapping tables; if the matching items are obtained, interrupt sources of corresponding levels are generated according to the traversal history and the level of the matching items in the mapping table; the multi-level mapping table includes at least one group of data areas, Each group of data areas includes at least one address and length;

Step 14: Obtain the level and type of the interrupt source according to the interrupt source, and execute corresponding interrupt processing instructions according to the level and type of the interrupt source.

In this embodiment of the present invention, data transmitted to the node through optical fiber is acquired. Optical fiber is a channel for transmitting data. It has the characteristics of fast transmission speed and low data loss, and can transmit large amounts of data to this node in real time. Parse the data to get the address corresponding to the data. The purpose of parsing the data is to find out the address information contained in the data to facilitate subsequent data processing. This operation can better understand the meaning and purpose of the data. According to the address, items in the first-level mapping table in the multi-level mapping table are traversed one by one in order to obtain matching items, and an interrupt source of the corresponding level is generated. This process is to quickly find the required data when the data is complex. , improve processing efficiency, and at the same time, the generated interrupt source can focus the processing on important data and optimize the use of resources. According to the interrupt source, obtain the level and type of the interrupt source, and execute the corresponding interrupt processing instructions. This operation can perform different operations according to different interrupt sources, making data processing more targeted. In addition, this also It can classify and manage various types and levels of interruption sources to improve the efficiency and accuracy of data processing.

In a preferred embodiment of the present invention, the above step 11 may include:

Step 111, obtain the number M of data areas and the number of addresses N contained in each data area;

Step 112: Allocate required storage space to each data area for storing at least one address and length information corresponding to each address. The length information includes the start position, end position and from the start position to the end position of the address. The length of the continuous address area;

Step 113: Allocate a fixed storage location in each data area for each address and the corresponding length of each address according to the numerical size of the storage address to form a multi-level mapping table with a length of N.

In the embodiment of the present invention, obtaining the number M of data areas and the number of addresses N contained in each data area helps to understand the overall structure and scale of the mapping table and create conditions for subsequent data storage and retrieval. Allocate the required storage space to each data area to store at least one address and the length information corresponding to each address. This can ensure that each data area has enough space to store the address and length information, avoiding data corruption. Lost or confused. According to the numerical size of the storage address, a fixed storage location is allocated in each data area for each address and the length corresponding to each address, so as to form a multi-level mapping table with a length of N, which can make each address and length information All have a fixed position in the mapping table to facilitate subsequent data retrieval and use. At the same time, the design of multi-level mapping tables can further improve the efficiency of data retrieval.

In a preferred embodiment of the present invention, the above step 112 may include:

Step 1121, obtain the storage space required for each piece of address information and length information;

Step 1122: Allocate corresponding storage space to each data area according to the required storage space;

Step 1123: Store corresponding length information for each address in the allocated storage space.

In the embodiment of the present invention, the storage space required for each piece of address information and length information is obtained. This step will determine the required storage space based on the size and type of data, helping to rationally allocate and utilize storage resources. According to the required storage space, allocate corresponding storage space to each data area. This step is to allocate appropriate storage space to each data area based on the storage space requirements required for each piece of address information and length information obtained in step 1121. , ensure the safe storage of data. In the allocated storage space, the corresponding length information is stored for each address. This step will store the corresponding length information for each address information in the storage space determined by each data area, thereby providing complete data information and convenient Subsequent retrieval and use of data.

In a preferred embodiment of the present invention, the above step 13 may include:

Step 131: Traverse the entire metadata table or status table in sequence to obtain the status of each data area;

Step 132, if the status of the first data area is idle or partially occupied, write new data into the first data area and jump to the next data area;

Step 133: If the status of the first data area is displayed as occupied, skip the first data area and continue traversing the next data area.

In the embodiment of the present invention, the metadata table or status table is traversed to obtain the status of each data area, and the usage of each data area can be understood, thereby making better data management decisions; if the first data area If the status is idle or partially occupied, then new data will be written to this area, and then the program will jump to the next data area, which can achieve efficient use of storage space and avoid waste of space; if the first data If the status of the area is occupied, the program will skip this area and continue traversing the next data area. This can avoid unnecessary operations on already occupied data areas and improve the efficiency of data management.

In a preferred embodiment of the present invention, the above step 14 may include:

Step 141, traverse the mapping table again, find the storage area corresponding to the data, and obtain the physical address of the storage area;

Step 142, access the physical address, read the required data or write the data to the target address according to the length and format of the storage area;

Step 143: Return the read data to the requester, or update the mapping table after writing the data to the target address.

In the embodiment of the present invention, the mapping table is traversed again to find the storage area corresponding to the data, and the physical address of the storage area is obtained. The actual storage location of the data can be determined, which provides a basis for subsequent data reading and writing operations. After obtaining the physical address, the system will access the physical address according to the length and format of the storage area, read the required data or write the data to the target address. This step ensures that data is read or written correctly. The read data will be returned to the requester, or after the data is written to the target address, the system will update the mapping table, which is very important for data management and tracking, ensuring the accuracy and consistency of the data, and also making the data more secure. Access is more efficient.

In a preferred embodiment of the present invention, after the above step 14, it may include:

Step 15, set the priority for each interrupt source and mapping item;

Step 16: Sort the interrupt sources and mapping items according to their priorities to obtain a list of interrupt sources and mapping items in order from high to low priority;

Step 17: Select interrupt sources or mapping items one by one from the sorted list for processing.

In the embodiment of the present invention, a priority is set for each interrupt source and mapping item, so that priority management of the interrupt source and mapping item can be performed. This enables the system to process multiple interrupt sources and mapping items according to priority, ensuring that high-priority interrupt sources and mapping items are processed first. According to the priority of interrupt sources and mapping items, the system sorts and obtains a list of interrupt sources and mapping items in order from high priority to low. The purpose is to effectively interrupt sources and mapping items when multiple interrupt sources and mapping items exist. Manage and schedule these resources to ensure stable operation of the system. Select interrupt sources or mapping items one by one from the sorted list for processing. The advantage is that it can ensure that interrupt sources and mapping items are processed in order according to priority, ensure that high-priority tasks can be processed first, and improve the response speed and processing of the system. efficiency.

As shown in Figure 2, an embodiment of the present invention also provides a multi-level mapping table interrupt source optical fiber data transmission device 20, which includes:

The acquisition module 21 is used to acquire the data transmitted to the node through the optical fiber; parse the data to obtain the address corresponding to the data;

The processing module 22 is configured to traverse the items in the first-level mapping table in the multi-level mapping table one by one in order according to the address to obtain a matching item. If the matching item is not obtained, then traverse the next-level mapping one by one in order. table until a matching item is obtained or all mapping tables are traversed; if the matching item is obtained, an interrupt source of the corresponding level is generated according to the traversal history and the level of the matching item in the mapping table; the multi-level mapping table includes at least one group Data area, each group of data areas includes at least one address and length; according to the interrupt source, the level and type of the interrupt source are obtained, and corresponding interrupt processing instructions are executed according to the level and type of the interrupt source.

Optionally, obtain the data transmitted to this node through optical fiber, including:

Get the number M of data areas and the number of addresses N contained in each data area;

Allocate required storage space to each data area to store at least one address and length information corresponding to each address;

According to the numerical size of the storage address, a fixed storage location is allocated in each data area for each address and the corresponding length of each address to form a multi-level mapping table with a length of N.

Optionally, the length information includes the start position, the end position of the address, and the length of the continuous address area from the start position to the end position.

Optionally, allocate the required storage space for each data area to store at least one address and the length information corresponding to each address, including:

Obtain the storage space required for each piece of address information and length information;

According to the required storage space, allocate corresponding storage space to each data area;

In the allocated storage space, the corresponding length information is stored for each address.

Optionally, according to the address, traverse the items in the first-level mapping table in the multi-level mapping table one by one in order to obtain a matching item. If the matching item is not obtained, then traverse the next-level mapping table one by one in order, Until a match is obtained or all mapping tables are traversed, including:

Traverse the entire metadata table or status table in sequence to obtain the status of each data area;

If the status of the first data area is idle or partially occupied, new data is written into the first data area and jumps to the next data area;

If the status of the first data area is displayed as occupied, the first data area is skipped and the next data area is continued to be traversed.

Optionally, obtain the level and type of the interrupt source according to the interrupt source, and execute corresponding interrupt processing instructions according to the level and type of the interrupt source, including:

Traverse the mapping table again to find the storage area corresponding to the data and obtain the physical address of the storage area;

Access the physical address, read the required data or write the data to the target address according to the length and format of the storage area;

Return the read data to the requester, or update the mapping table after writing the data to the target address.

Optionally, after obtaining the level and type of the interrupt source according to the interrupt source, and executing the corresponding interrupt processing instructions according to the level and type of the interrupt source, it also includes:

Set priority for each interrupt source and mapping item;

Sort according to the priority of interrupt sources and mapping items to obtain a list of interrupt sources and mapping items in order from high to low priority;

Select interrupt sources or mapping items one by one from the sorted list for processing.

It should be noted that this device is a device corresponding to the above method. All implementation methods in the above method embodiment are applicable to this embodiment and can achieve the same technical effect.

An embodiment of the present invention also provides a computing device, including: a processor and a memory storing a computer program. When the computer program is run by the processor, the method as described above is executed. All implementations in the above method embodiment are applicable to this embodiment and can achieve the same technical effect.

Embodiments of the present invention also provide a computer-readable storage medium that stores instructions that, when executed on a computer, cause the computer to perform the method described above. All implementations in the above method embodiment are applicable to this embodiment and can achieve the same technical effect.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered to be beyond the scope of the present invention.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

In addition, it should be pointed out that in the device and method of the present invention, obviously, each component or each step can be decomposed and/or recombined. These decompositions and/or recombinations should be regarded as equivalent solutions of the present invention. Furthermore, the steps for executing the above series of processes can naturally be executed in chronological order in the order described, but they do not necessarily need to be executed in chronological order, and some steps may be executed in parallel or independently of each other. For those of ordinary skill in the art, it can be understood that all or any steps or components of the method and device of the present invention can be implemented in any computing device (including processor, storage medium, etc.) or a network of computing devices in the form of hardware or firmware. , software or their combination, this can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

Therefore, the objects of the invention can also be achieved by running a program or a set of programs on any computing device. The computing device may be a well-known general-purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product containing a program code for implementing the method or apparatus. That is, such a program product also constitutes the present invention, and a storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium may be any known storage medium or any storage medium developed in the future. It should also be pointed out that in the device and method of the present invention, obviously, each component or each step can be decomposed and/or recombined. These decompositions and/or recombinations should be regarded as equivalent solutions of the present invention. Furthermore, the steps for executing the above series of processes can naturally be executed in chronological order in the order described, but do not necessarily need to be executed in chronological order. Certain steps can be performed in parallel or independently of each other.

The above is the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications can also be made. should be regarded as the protection scope of the present invention.

Claims (10)

1. A method for interrupting source fiber data transmission with a multi-level mapping table, the method comprising:

acquiring data transmitted to the node through an optical fiber;

analyzing the data to obtain an address corresponding to the data;

according to the address, traversing items in a first-level mapping table in the multi-level mapping table one by one in sequence to obtain matching items, and if the matching items are not obtained, traversing a next-level mapping table one by one in sequence until the matching items are obtained or traversing all mapping tables; if the matching item is obtained, generating an interrupt source of a corresponding level according to the traversal history and the level of the matching item in the mapping table; the multi-level mapping table comprises at least one group of data areas, and each group of data areas comprises at least one address and at least one length;

and acquiring the level and the type of the interrupt source according to the interrupt source, and executing a corresponding interrupt processing instruction according to the level and the type of the interrupt source.

2. The method for interrupting source fiber optic data transmission by a multi-level mapping table of claim 1, wherein obtaining data transmitted to the node via the fiber comprises:

acquiring the number M of the data areas and the number N of the addresses contained in each data area;

allocating a required storage space for each data area for storing at least one address and length information corresponding to each address;

and distributing fixed storage positions in each data area according to the numerical value of the storage address and the length corresponding to each address so as to form a multi-level mapping table with the length of N.

3. The multi-level map interrupt source optical fiber data transmission method according to claim 2, wherein the length information includes a start position, an end position of an address, and a length of an address area continuing from the start position to the end position.

4. A multi-stage mapping table interrupt source optical fiber data transmission method according to claim 3, wherein allocating a required storage space for each data area for storing at least one address and length information corresponding to each address comprises:

acquiring a storage space required by each piece of address information and length information;

according to the required storage space, corresponding storage space is allocated for each data area;

in the allocated memory space, corresponding length information is stored for each address.

5. The method for transferring data from a source optical fiber to a multi-stage mapping table interrupt according to claim 4, wherein traversing items in a one-stage mapping table in the multi-stage mapping table one by one in order according to the address to obtain matching items, traversing a next-stage mapping table one by one in order until obtaining matching items or traversing all mapping tables if not obtaining the matching items, comprises:

traversing the whole metadata table or the state table in sequence to acquire the state of each data area;

if the state of the first data area is idle or partially occupied, writing new data into the first data area, and jumping to the next data area;

if the state of the first data area is displayed as occupied, skipping the first data area, and continuing to traverse the next data area.

6. The method for transmitting optical fiber data of interrupt source in multistage mapping table according to claim 5, wherein obtaining the level and type of the interrupt source according to the interrupt source, and executing the corresponding interrupt processing instruction according to the level and type of the interrupt source, comprises:

traversing the mapping table again, finding a storage area corresponding to the data, and acquiring a physical address of the storage area;

accessing a physical address, and reading the required data or writing the data into a target address according to the length and the format of a storage area;

and returning the read data to the requester, or after writing the data to the target address, updating the mapping table.

7. The method for transmitting optical fiber data of interrupt source in multistage mapping table according to claim 6, wherein after obtaining the level and type of the interrupt source according to the interrupt source and executing the corresponding interrupt processing instruction according to the level and type of the interrupt source, further comprising:

setting a priority for each interrupt source and mapping item;

sequencing according to the priority of the interrupt sources and the mapping items to obtain an interrupt source and mapping item list in the order from high to low according to the priority;

interrupt sources or mapping items are selected from the ordered list one by one for processing.

8. A multi-level mapping table interrupt source optical fiber data transmission device, comprising:

the acquisition module is used for acquiring data transmitted to the node through the optical fiber; analyzing the data to obtain an address corresponding to the data;

the processing module is used for traversing items in a first-level mapping table in the multi-level mapping table one by one according to the address to obtain matching items, and traversing a next-level mapping table one by one according to the sequence if the matching items are not obtained until the matching items are obtained or all mapping tables are traversed; if the matching item is obtained, generating an interrupt source of a corresponding level according to the traversal history and the level of the matching item in the mapping table; the multi-level mapping table comprises at least one group of data areas, and each group of data areas comprises at least one address and at least one length; and acquiring the level and the type of the interrupt source according to the interrupt source, and executing a corresponding interrupt processing instruction according to the level and the type of the interrupt source.

9. A computing device, comprising:

one or more processors;

storage means for storing one or more programs which when executed by the one or more processors cause the one or more processors to implement the method of any of claims 1-7.

10. A computer readable storage medium, characterized in that the computer readable storage medium has stored therein a program which, when executed by a processor, implements the method according to any of claims 1-7.