CN113852554B

CN113852554B - Data transmission method, device and equipment

Info

Publication number: CN113852554B
Application number: CN202111438933.5A
Authority: CN
Inventors: 崔丽珍; 张俊祥; 马晨光; 崔波
Original assignee: China Star Network System Research Institute Co ltd
Current assignee: China Star Network System Research Institute Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-03-04
Anticipated expiration: 2041-11-29
Also published as: CN113852554A

Abstract

The embodiment of the invention provides a data transmission method, a data transmission device and data transmission equipment, which are used for solving the problems of long data transmission time delay and low efficiency in the prior art. In the embodiment of the invention, the path mapping relations corresponding to the service requests with different priorities are pre-stored, after the service request is received, the target transmission path corresponding to the service request is determined according to the priority of the service request and the stored path mapping relations corresponding to the service requests with different priorities, and the data of the service corresponding to the service request is transmitted through the target transmission path. The method avoids determining the routing information and judging whether the corresponding transmission path can transmit after receiving the service request, thereby reducing the transmission time delay and effectively improving the data transmission efficiency.

Description

Data transmission method, device and equipment

Technical Field

The present invention relates to the field of data transmission technologies, and in particular, to a data transmission method, apparatus, and device.

Background

With the rapid development of information technology and the increasing demand for global communication, the construction and application of satellite internet are rapidly developed, and a situation of the common explosion development of narrowband/broadband satellite communication systems is presented, wherein the satellite can support data transmission of ground users. In the prior art, Software Defined Network (SDN) technology is gradually introduced into the satellite internet control category due to its flexible and open features in order to perform data transmission quickly and efficiently. The software-defined satellite networking technology based on the open flow (OpenFlow) extension protocol provides a solution for data transmission of services corresponding to end-to-end service requests. According to the programmable characteristic of the satellite component, the satellite has intelligent integrated communication transmission and exchange capacity through an OpenFlow extension protocol mechanism of a software defined network, a unified control and management function is formed, dynamic changes of a scheduling strategy are adapted, and the networking flexibility and reliable transmission efficiency of the satellite network are improved by applying a space satellite component programmable networking technology.

Fig. 1 is a schematic process diagram of a satellite in data transmission in the prior art, as can be seen from fig. 1, an OpenFlow central controller receives a service request, and after receiving the service request, if the priority of the service request is higher, a transmission path corresponding to the service request is preferentially determined, specifically, when determining the transmission path corresponding to the service request, according to identification information of a source node and a destination node carried in the service request, the determined resource required for transmitting the service request, and an obtained satellite coverage range, an OpenFlow extension protocol is used, and a corresponding routing algorithm is used to calculate routing information satisfying the service request; the OpenFlow central controller acquires a link state and a satellite resource use state of a corresponding satellite in the routing information according to each determined routing information meeting the service request, judges whether a transmission path corresponding to the routing information can transmit data of the service corresponding to the service request, and if the transmission path cannot transmit the data of the service corresponding to the service request, does not transmit the data of the corresponding service, namely the service request fails; and if the data can be transmitted, transmitting the data of the service corresponding to the service request through the corresponding transmission path. And the OpenFlow central controller controls the corresponding satellite to allocate the required resources to the service request, and releases the transmission resources of the satellite after the corresponding data transmission is finished.

However, when a large number of service requests are received, if the above-mentioned manner is adopted to determine the routing information satisfying the service request first and determine the transmission path satisfying the service request based on the routing information, the transmission delay is increased, which affects the transmission efficiency of data.

Disclosure of Invention

The embodiment of the invention provides a data transmission method, a data transmission device, data transmission equipment and a data transmission medium, which are used for solving the problems of long data transmission time delay and low efficiency in the prior art.

In a first aspect, an embodiment of the present invention provides a data transmission method, where the method includes:

receiving a service request; acquiring the current time of receiving the service request, and identification information of a first source node and a first destination node carried in the request;

determining a target transmission path according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, the current time and a path mapping relation corresponding to the pre-stored service of each priority; and transmitting the data of the service corresponding to the service request through the target transmission path.

Further, the path mapping relationship corresponding to the service of each priority is determined by the following method:

for any pair of a second source node and a second destination node, determining routing information corresponding to the second source node and the second destination node in different time ranges by a topology snapshot technology according to the operation cycles of the pair of the second source node, the second destination node and the satellite;

for each priority service in each time range, determining the resources to be allocated for the priority service according to the counted required resources of the priority service in the time range; determining each transmission path corresponding to the priority service and the number of the priority service or the resource amount which can be transmitted by each transmission path according to the resource to be allocated, the network link state of the satellite in the time range and the remaining resource to be allocated of the satellite; and storing the corresponding relationship between each transmission path corresponding to the priority service and the identification information and the time range of the second source node and the second destination node, and the number or resource amount of the priority service which can be transmitted by each transmission path.

Further, the determining each transmission path corresponding to the priority service according to the resource to be allocated, the network link state of the satellite in the time range, and the remaining resource to be allocated of the satellite, and the number of the priority service or the resource amount that can be transmitted by each transmission path include:

and determining each transmission path corresponding to the priority service and the number of the priority service or the resource quantity which can be transmitted by each transmission path in a Russian nesting doll or maximum allocation model mode according to the resource to be allocated, the network link state of the satellite in the time range and the remaining resource to be allocated of the satellite.

Further, the determining a target transmission path according to the priority of the service request, the identifier information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority includes:

and searching each transmission path corresponding to the time range including the current time corresponding to the first source node and the first destination node of the identification information according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node and the current time, and determining the transmission path as a target transmission path if the transmission path capable of transmitting the service corresponding to the service request exists according to the residual quantity or the residual resource quantity of the service of the priority which can be transmitted by each transmission path.

Further, the method further comprises:

and updating each transmission path corresponding to the first source node and the first destination node of the stored identification information and including the time range of the current time, and the remaining quantity or the remaining resource quantity of the service of the priority level which can be transmitted.

Further, the determining a target transmission path according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority includes:

and searching each transmission path corresponding to the time range including the current time corresponding to the first source node and the first destination node of the identification information according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node and the current time, and determining the transmission path as a target transmission path if the transmission path with the corresponding time delay not less than the time delay requirement of the service with the priority exists according to the time delay corresponding to each transmission path.

Further, if the target transmission path is not acquired, the method further includes:

determining routing information for transmitting the data of the service corresponding to the service request by using an OpenFlow expansion protocol according to the received satellite coverage range;

and judging whether the corresponding transmission path can transmit corresponding data according to the determined routing information and the network state of the target satellite contained in the routing information, and if so, determining the corresponding transmission path as a target transmission path so as to transmit the data of the service corresponding to the service request through the target transmission path.

Further, the method further comprises:

and if the transmission of the data of the service corresponding to the service request is finished through the determined target transmission path, releasing the resources of the satellite corresponding to the target transmission path.

In a second aspect, an embodiment of the present invention provides a data transmission apparatus, where the apparatus includes:

the receiving and acquiring module is used for receiving the service request; acquiring the current time of receiving the service request, and identification information of a first source node and a first destination node carried in the request;

a processing module, configured to determine a target transmission path according to a priority of a service corresponding to the service request, identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority; and transmitting the data of the service corresponding to the service request through the target transmission path.

Further, the processing module is further configured to determine, for any pair of a second source node and a second destination node, routing information corresponding to the second source node and the second destination node in different time ranges by using a topology snapshot technique according to the operating cycles of the pair of the second source node, the second destination node, and the satellite; for each priority service in each time range, determining the resources to be allocated for the priority service according to the counted required resources of the priority service in the time range; determining each transmission path corresponding to the priority service and the number of the priority service or the resource amount which can be transmitted by each transmission path according to the resource to be allocated, the network link state of the satellite in the time range and the remaining resource to be allocated of the satellite; and storing the corresponding relationship between each transmission path corresponding to the priority service and the identification information and the time range of the second source node and the second destination node, and the number or resource amount of the priority service which can be transmitted by each transmission path.

Further, the processing module is specifically configured to determine, according to the resource to be allocated, the network link state of the satellite in the time range, and the remaining resource to be allocated of the satellite, each transmission path corresponding to the priority service, and the number of the priority services or the resource amount that can be transmitted by each transmission path in a manner of russian nesting doll or a maximum allocation model.

Further, the processing module is specifically configured to search, according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, and the current time, each transmission path corresponding to the time range including the current time, corresponding to the first source node and the first destination node of the identification information, and determine, if it is determined that there is a transmission path capable of transmitting the service corresponding to the service request according to the remaining quantity or the remaining resource quantity of the service of the priority that can be transmitted by each transmission path, the transmission path as the target transmission path.

Further, the processing module is further configured to update each transmission path corresponding to the first source node and the first destination node of the stored identification information and including the time range of the current time, and the remaining amount of the service of the priority that can be transmitted or the remaining amount of the resource.

Further, the processing module is specifically configured to search, according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, and the current time, each transmission path corresponding to the time range including the current time, corresponding to the first source node and the first destination node of the identification information, and determine, if a transmission path having a corresponding time delay not less than the time delay requirement of the service of the priority exists according to the time delay corresponding to each transmission path, that transmission path as a target transmission path.

Further, the processing module is further configured to determine, according to the received satellite coverage, routing information for transmitting data of a service corresponding to the service request by using an OpenFlow extension protocol; and judging whether the corresponding transmission path can transmit corresponding data according to the determined routing information and the network state of the target satellite contained in the routing information, and if so, determining the corresponding transmission path as a target transmission path so as to transmit the data of the service corresponding to the service request through the target transmission path.

Further, the processing module is further configured to release the resource of the satellite corresponding to the target transmission path if the transmission of the data of the service corresponding to the service request is completed through the determined target transmission path.

In a third aspect, an embodiment of the present invention provides an electronic device, where the electronic device includes at least a processor and a memory, and the processor is configured to execute the steps of the data transmission method according to any one of the foregoing methods when executing a computer program stored in the memory.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which stores a computer program, and the computer program, when executed by a processor, performs the steps of any of the data transmission methods described above.

In the embodiment of the invention, the path mapping relations corresponding to the service requests with different priorities are pre-stored, after the service request is received, the target transmission path corresponding to the service request is determined according to the priority of the service request and the stored path mapping relations corresponding to the service requests with different priorities, and the data of the service corresponding to the service request is transmitted through the target transmission path. The method avoids determining the routing information and judging whether the corresponding transmission path can transmit after receiving the service request, thereby reducing the transmission time delay and effectively improving the data transmission efficiency.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art satellite in data transmission;

fig. 2 is a schematic diagram of a data transmission process according to an embodiment of the present invention;

fig. 3 is a detailed schematic diagram of a data transmission process according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another data transmission apparatus according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

In order to reduce the time delay of data transmission and improve the transmission efficiency, in the embodiment of the present invention, an OpenFlow central controller receives a service request, and after receiving the service request, acquires the current time of receiving the service request, and the identification information of a first source node and a first destination node carried in the service request, and determines a target transmission path according to the priority of a service corresponding to the service request, the identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority; the data of the service corresponding to the service request is transmitted through the determined target transmission path, so that the situation that after the service request is received, the routing information is determined and whether the corresponding transmission path can transmit or not is judged is avoided, the transmission time delay is effectively reduced, and the data transmission efficiency is improved.

Example 1:

fig. 2 is a schematic diagram of a data transmission process provided in an embodiment of the present invention, where the process includes the following steps:

s201: receiving a service request; and acquiring the current time of receiving the service request, and identification information of a first source node and a first destination node carried in the service request.

The data transmission method provided by the embodiment of the invention is applied to the OpenFlow central controller.

In the embodiment of the present invention, the OpenFlow central controller receives a service request, and in order to determine a transmission path for transmitting data of a service corresponding to the service request, after receiving the service request, obtains a current time at which the service request is received, and obtains identification information of a first source node and identification information of a first destination node, which are carried in the service request. The first source node and the first destination node are satellites in the satellite network which directly forward data to the terminal.

S202: determining a target transmission path according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, the current time and a path mapping relation corresponding to the pre-stored service of each priority; and transmitting the data of the service corresponding to the service request through the target transmission path.

In the embodiment of the present invention, in order to effectively transmit the data of the service corresponding to the service request, a path mapping relationship corresponding to the service with different priorities is stored in advance in the OpenFlow central controller. After receiving the service request, the priority of the service corresponding to the service request is obtained, where the path mapping relationship corresponding to the service of each priority may be the correspondence relationship between each path corresponding to the service of each priority and the identification information of the source node, the identification information of the destination node, and the time range.

And in the path mapping relationship, there are recorded a plurality of transmission paths respectively passing through corresponding source nodes and destination nodes in each time range, and each transmission path can be used to satisfy how many services of the priority, or how many resources of the data transmission requirements of the services of the priority, and specifically, in the recording, it may be recorded, for each transmission path, how many services of the priority or how many resources of the data transmission requirements of the services of the priority that the transmission path can satisfy. Specifically, because the resource amount required by different services in the service with the priority is also different, where the resource amount may be a bandwidth, it may be recorded in the path mapping relationship for each specific service, that is, how much the transmission path can satisfy the transmission requirements of a certain service with the priority and how much other services.

Therefore, when a service request is received, according to the priority of the service request, the current time, and the identification information of the first source node and the first destination node, each transmission path for data transmission through the first source node and the first destination node of the identification information in a time range including the current time may be searched, and the remaining quantity of the priority service that can be transmitted through each determined transmission path or the remaining resource quantity of the priority service that can be transmitted may also be determined, where the remaining resource quantity may be a remaining bandwidth, thereby determining a target transmission path. And when determining the target transmission path, the information such as the source address, the destination address, the source port, the destination port and the like of the data of the service corresponding to the service request is specifically determined.

After the target transmission path is determined, the OpenFlow central controller notifies a satellite corresponding to the target transmission path to transmit corresponding data based on the satellite corresponding to the target transmission path, so that the data of the service corresponding to the service request can be transmitted through the determined target transmission path.

Example 2:

in order to effectively reduce the time delay of data transmission, on the basis of the above embodiment, in the embodiment of the present invention, the path mapping relationship corresponding to the service of each priority is determined in the following manner:

Since the operating state of the satellite is constantly changing, that is, the positions of the satellite in the orbit at different times and the relationship with other satellites are constantly changing, the network link state of the satellite is also constantly changing, wherein the network link state can be understood as the resource condition of the transmission link. But because the satellite has a certain operation period and the ephemeris information of the satellite is also fixed. Therefore, the routing information corresponding to any pair of the second source node and the second destination node in different time ranges can be determined according to the running state of the satellite and the network link state of the satellite.

Specifically, when determining routing information corresponding to any pair of a second source node and a second destination node in different time ranges, the routing information corresponding to the second source node and the second destination node in different time ranges is determined through a topology snapshot technique according to the operation cycles of the pair of the second source node, the second destination node, and the satellite.

In order to pre-establish the path mapping relationship corresponding to the services with different priorities, the actual service requirement of the service with each priority is also considered, so in the embodiment of the present invention, service model statistics may be performed in advance to determine the bandwidth requirement between any pair of the second source node and the second destination node of the service with each priority in different time ranges. And allocating resources to be allocated to the service of each priority according to the determined bandwidth requirement, so as to facilitate the establishment of a path mapping relationship, wherein the resources to be allocated to the service of each priority generally satisfy the service request corresponding to the service of high priority preferentially. For example, the statistical bandwidth required by the high-priority service within a certain time range may be 30M, and in order to meet the transmission requirement of the data of the high-priority service, it may be determined that the bandwidth to be allocated to the high-priority service is 30M.

After determining the resources to be allocated for each priority level of traffic, because the routing information between any pair of the second source node and the second destination node in each time range is already determined, each transmission path may be determined based on the usage state of each satellite, the network link state of the satellite, and the remaining resources to be allocated for the satellite, which are included in the routing information, and it may be determined how many traffic of that priority level or how many resource amounts of traffic of that priority level may be simultaneously transmitted by each transmission path, and wherein the resource amounts may be bandwidths, that is, how many traffic of that priority level or how many bandwidths of traffic of that priority level may be simultaneously transmitted by each transmission path may be determined.

After the corresponding transmission paths are determined, the corresponding relationship between the identification information of each transmission path corresponding to the priority service and the second source node and the second destination node and the time range is stored, and the number or resource amount of the priority service which can be transmitted by each transmission path is also stored.

In the embodiment of the present invention, the network link state of the satellite and the remaining resources to be allocated of the satellite are determined according to the established software-defined satellite network, that is, after the software-defined satellite network is established, the satellite can send the current network link state and the remaining resources to be allocated to the OpenFlow central controller at regular time.

In order to improve the utilization efficiency of satellite resources, on the basis of the foregoing embodiments, in an embodiment of the present invention, determining each transmission path corresponding to the priority service according to the resource to be allocated, the network link state of the satellite in the time range, and the remaining resource to be allocated of the satellite, and the number of the priority services or the resource amount that can be transmitted by each transmission path include:

In the embodiment of the present invention, when each transmission path corresponding to the priority service is determined, each transmission path corresponding to the priority service is determined according to the resource to be allocated of the priority service, the network link state of the satellite in the time range, and the remaining resource to be allocated of the satellite. And when determining each transmission path corresponding to the priority service, further determining the number of the priority services that can be transmitted by each transmission path corresponding to the priority service or the resource amount of the priority services that can be transmitted, where the resource amount may be a bandwidth. In order to improve the resource utilization efficiency of the satellite, when each transmission path is determined, the remaining resources to be allocated of the satellite are allocated in a Russian nesting doll or maximum allocation model manner, so that each transmission path corresponding to the priority service is determined, the number of the priority services which can be transmitted by the corresponding transmission path is increased, and the resource utilization efficiency of the satellite is improved. Specifically, how to adopt a russian nesting doll or a maximum allocation model to allocate resources is the prior art and is not described herein again.

Example 3:

in order to accurately determine a target transmission path, on the basis of the foregoing embodiments, in an embodiment of the present invention, the determining a target transmission path according to the priority of the service request, the identification information of the first source node and the first destination node, the current time, and a path mapping relationship corresponding to a service of each priority stored in advance includes:

In the embodiment of the present invention, when a target transmission path is determined, a search is performed in a path mapping relationship corresponding to a service of a priority level according to the priority level of the service corresponding to a service request, identification information of a first source node and a first destination node, and a current time, specifically, a search is performed according to a correspondence relationship between each transmission path corresponding to the service of the priority level and identification information and a time range of the source node and the destination node, and the searched transmission path is each transmission path corresponding to the identification information matched with the identification information of the first source node and the first destination node and including the time range of the current time.

Since the number or resource amount of the priority service that can be transmitted by each path corresponding to each priority service is limited, and in the embodiment of the present invention, the remaining number of the priority service that can be transmitted by each transmission path or the remaining resource amount of the priority service that can be transmitted can also be determined according to the already allocated transmission path. Therefore, after each transmission path corresponding to the priority service is found, whether the remaining quantity of the priority service which can be transmitted by any transmission path is not 0 or the remaining resource quantity of the priority service which can be transmitted is not less than the required resource quantity of the service corresponding to the received service request exists in each determined transmission path is judged, if yes, namely, a transmission path meeting the data transmission requirement of the priority service exists, any transmission path is determined to be a target transmission path in the transmission paths meeting the data transmission requirement of the priority service.

In order to effectively perform data transmission, on the basis of the foregoing embodiments, in an embodiment of the present invention, the method further includes:

In the embodiment of the present invention, after the target transmission path is determined, in order to meet the transmission requirements of other services, the remaining number of the services of the priority level that can be transmitted by the target transmission path or the remaining resource amount of the services of the priority level that can be transmitted is updated.

Example 4:

In the embodiment of the present invention, when a target transmission path is determined, a search is performed in a path mapping relationship corresponding to a service of a priority level according to the priority level of the service corresponding to a service request, identification information of a first source node and a first destination node, and a current time, specifically, a search is performed according to a correspondence relationship between each transmission path corresponding to the service of the priority level and identification information and a time range of the source node and the destination node, and the searched transmission path is each transmission path corresponding to the time range including the current time, where the corresponding identification information is matched with the identification information of the first source node and the first destination node.

Because different services may have requirements on transmission delay, in the embodiment of the present invention, in order to meet the delay requirement of service request transmission, each transmission path correspondingly stores the delay corresponding to the transmission path, and generally, the delay of a high-orbit satellite is larger, the delay of a medium-orbit satellite is inferior, and the delay of a low-orbit satellite is minimum. Therefore, after each transmission path meeting the data transmission requirement of the service with the priority is found, whether the time delay corresponding to each found transmission path is not less than the time delay requirement carried in the service request is judged, and if yes, the transmission path with any corresponding time delay not less than the time delay requirement carried in the service request in each transmission path is determined as the target transmission path.

In order to effectively perform data transmission, on the basis of the foregoing embodiments, in an embodiment of the present invention, if the target transmission path is not acquired, the method further includes:

In the embodiment of the present invention, after receiving the service request, if the transmission path that does not satisfy the service corresponding to the service request is not found, that is, the number of the services that satisfy the priority in each determined transmission path is 0 or, or the amount of the remaining resources is less than the required resources of the service of the priority, that is, the remaining bandwidth is less than the required bandwidth of the service of the priority, that is, the target transmission path corresponding to the service request is not obtained. In order to ensure that the service requested by the service can be normally performed, in the embodiment of the present invention, the OpenFlow central controller determines, according to the received satellite coverage, routing information for transmitting data of the service corresponding to the service request by using an OpenFlow extension protocol, and specifically, determines routing information for transmitting data of the service corresponding to the service request according to identification information of a first source node and a first destination node carried in the service request, the determined resource required for transmitting the service request, and the acquired satellite coverage.

After the corresponding routing information is determined, for each determined routing information, determining whether a transmission path corresponding to the routing information is enough to transmit data of the service corresponding to the service request. Specifically, the detailed determination process is as follows: and for each determined routing information, according to a target satellite contained in the routing information, acquiring a link state and a satellite resource use state of the received target satellite, judging whether the residual resources of the satellite contained in the routing information are enough to transmit the data of the service corresponding to the service request, if the residual resources of the satellite contained in the routing information are enough to transmit the data of the service corresponding to the service request, determining a transmission path corresponding to the routing information as a target transmission path, and after determining the target transmission path, notifying the satellite corresponding to the target transmission path by the OpenFlow central controller so as to transmit the corresponding data based on the satellite corresponding to the target transmission path, so that the data of the service corresponding to the service request can be transmitted through the determined target transmission path.

In order to accurately perform data transmission, on the basis of the foregoing embodiments, in an embodiment of the present invention, the method further includes:

In the embodiment of the present invention, if the data of the service corresponding to the service request is transmitted through the determined target transmission path, in order to facilitate the target transmission path to transmit the data of the service corresponding to the other service request, after the data transmission of the service corresponding to the service request is completed, the resource of the satellite in the target transmission path is released. That is, after the data transmission of the service corresponding to the service request is completed, the resource information such as the resource usage state of the satellite in the target transmission path is updated.

Example 5:

in the embodiment of the invention, if the satellite receives the data of the services corresponding to the service requests, the service with higher priority can be processed preferentially, that is, the transmission order of the data of the services corresponding to the service requests is determined according to the target priority of the service requests and the pre-stored priority order; and sequentially transmitting the data of the service corresponding to the service request according to the determined transmission sequence, namely, the satellite preferentially ensures the transmission of the data of the service corresponding to the service request with high priority based on a service quality control strategy.

For example, if a certain satellite receives a service request a and a service request B at the same time, and the priority of the service corresponding to the service request a is higher than the priority of the service corresponding to the service request B, the data of the service corresponding to the service request a is transmitted preferentially.

Fig. 3 is a detailed schematic diagram of a data transmission process provided in an embodiment of the present invention, where the detailed process is as follows:

s301: a software defined satellite network is established.

In the embodiment of the invention, a software-defined satellite network is established through an OpenFlow central controller based on a software-defined satellite Internet protocol, the running state of each satellite is monitored, and the network link state of the satellite and the satellite resource use state based on priority are monitored.

S302: and determining transmission paths of each pair of the second source node and the second destination node in different time ranges according to the information counted by the service model, the network link state of the satellite and the remaining resources to be allocated of the satellite by combining a topology snapshot technology.

S303: a service request is received.

S304: and judging whether a target transmission path meeting the transmission requirement of the service request exists in the path mapping relation corresponding to the service of each priority level which is stored in advance. If so, S305 is executed, otherwise, S306 is executed.

S305: and determining a target transmission path for transmitting the data of the service corresponding to the service request.

And transmitting the data of the service corresponding to the service request through the target transmission path.

S306: and determining a target transmission path for transmitting the data of the service corresponding to the service request in a data driving mode.

Specifically, the process of determining a target transmission path for transmitting data of the service corresponding to the service request in a data starting manner is as follows: determining routing information for transmitting the service data corresponding to the service request according to the received satellite coverage; and judging whether the corresponding transmission path can transmit the data of the corresponding service according to the determined routing information and the network state of the target satellite contained in the routing information, if so, determining the corresponding transmission path as the target transmission path so as to transmit the data of the service corresponding to the service request through the target transmission path.

Example 6:

fig. 4 is a schematic structural diagram of a data transmission device according to an embodiment of the present invention, where the device includes:

a receiving and acquiring module 401, configured to receive a service request; acquiring the current time of receiving the service request, and identification information of a first source node and a first destination node carried in the request;

a processing module 402, configured to determine a target transmission path according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority; and transmitting the data of the service corresponding to the service request through the target transmission path.

Further, the processing module 402 is further configured to determine, for any pair of a second source node and a second destination node, routing information corresponding to the second source node and the second destination node in different time ranges by using a topology snapshot technique according to the operating cycles of the pair of the second source node, the second destination node, and the satellite; for each priority service in each time range, determining the resources to be allocated for the priority service according to the counted required resources of the priority service in the time range; determining each transmission path corresponding to the priority service and the number of the priority service or the resource amount which can be transmitted by each transmission path according to the resource to be allocated, the network link state of the satellite in the time range and the remaining resource to be allocated of the satellite; and storing the corresponding relationship between each transmission path corresponding to the priority service and the identification information and the time range of the second source node and the second destination node, and the number or resource amount of the priority service which can be transmitted by each transmission path.

Further, the processing module 402 is specifically configured to determine, according to the resource to be allocated, the network link state of the satellite in the time range, and the remaining resource to be allocated of the satellite, each transmission path corresponding to the priority service, and the number of the priority services or the resource amount that can be transmitted by each transmission path in a manner of russian nesting doll or a maximum allocation model.

Further, the processing module 402 is specifically configured to search, according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, and the current time, each transmission path corresponding to the time range including the current time, which corresponds to the first source node and the first destination node of the identification information, and if it is determined that there is a transmission path capable of transmitting the service corresponding to the service request according to the remaining quantity or the remaining resource quantity of the service of the priority that can be transmitted by each transmission path, determine the transmission path as the target transmission path.

Further, the processing module 402 is further configured to update each transmission path corresponding to the first source node and the first destination node of the stored identification information and including the time range of the current time, and the remaining quantity or the remaining resource quantity of the service of the priority that can be transmitted.

Further, the processing module 402 is specifically configured to search, according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, and the current time, each transmission path corresponding to the time range including the current time, corresponding to the first source node and the first destination node of the identification information, and determine, if a transmission path having a corresponding time delay not less than the time delay requirement of the service of the priority exists according to the time delay corresponding to each transmission path, that transmission path as a target transmission path.

Further, the processing module 402 is further configured to determine, according to the received satellite coverage, routing information for transmitting data of a service corresponding to the service request by using an OpenFlow extension protocol; and judging whether the corresponding transmission path can transmit corresponding data according to the determined routing information and the network state of the target satellite contained in the routing information, and if so, determining the corresponding transmission path as a target transmission path so as to transmit the data of the service corresponding to the service request through the target transmission path.

Further, the processing module 402 is further configured to release the resource of the satellite corresponding to the target transmission path if the transmission of the data of the service corresponding to the service request is completed through the determined target transmission path.

In the embodiment of the present invention, fig. 5 is a schematic structural diagram of another data transmission device according to the embodiment of the present invention, where the data transmission device is applied to a satellite, as shown in fig. 5:

the apparatus includes a software defined satellite module 501 and a satellite forwarding module 502.

The software-defined satellite module 501 is configured to receive an instruction sent by an OpenFlow central controller, and send information such as a network link state of the satellite.

The satellite forwarding module 502 is configured to send data to other satellites in the target transmission path, and preferentially ensure sending of data of a high-priority service based on a quality of service control policy.

Further, the satellite forwarding module 502 is further configured to receive a transmission path sent by the OpenFlow central controller and including a satellite corresponding to the satellite forwarding module. The transmission path is a transmission path in which the OpenFlow central controller determines any pair of a second source node and a second destination node and is in different time ranges according to information counted by the service model, a network link state of the satellite corresponding to the satellite forwarding module and remaining resources to be allocated of the satellite corresponding to the satellite forwarding module by combining a topology snapshot technology, and the OpenFlow central controller sends the transmission path including the satellite corresponding to the satellite forwarding module in the determined transmission path to the satellite forwarding module.

Example 7:

on the basis of the foregoing embodiments, fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present invention, as shown in fig. 6, including: the system comprises a processor 601, a communication interface 602, a memory 603 and a communication bus 604, wherein the processor 601, the communication interface 602 and the memory 603 are communicated with each other through the communication bus 604.

The memory 603 has stored therein a computer program which, when executed by the processor 601, causes the processor 601 to perform the steps of:

In a possible implementation manner, the path mapping relationship corresponding to the service of each priority is determined by:

In a possible implementation manner, the determining, according to the resource to be allocated, the network link state of the satellite in the time range, and the remaining resource to be allocated of the satellite, each transmission path corresponding to the priority service, and the number of the priority service or the resource amount that can be transmitted by each transmission path includes:

In a possible implementation manner, the determining a target transmission path according to the priority of the service request, the identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to a service of each priority includes:

In one possible embodiment, the method further comprises:

In a possible implementation manner, the determining a target transmission path according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority includes:

In a possible implementation manner, if the target transmission path is not acquired, the method further includes:

In one possible embodiment, the method further comprises:

The communication bus mentioned in the above server may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.

The communication interface 602 is used for communication between the above-described electronic apparatus and other apparatuses.

The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Alternatively, the memory may be at least one memory device located remotely from the processor.

The Processor may be a general-purpose Processor, including a central processing unit, a Network Processor (NP), and the like; but may also be a Digital instruction processor (DSP), an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like.

Example 8:

on the basis of the foregoing embodiments, an embodiment of the present invention further provides a computer-readable storage medium, in which a computer program executable by an electronic device is stored, and when the program is run on the electronic device, the electronic device is caused to execute the following steps:

In one possible embodiment, the method further comprises:

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

For the system/apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method of data transmission, the method comprising:

determining a target transmission path according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, the current time and a path mapping relation corresponding to the pre-stored service of each priority; transmitting the data of the service corresponding to the service request through the target transmission path;

wherein, the path mapping relation corresponding to the service of each priority is determined by the following method:

and for each priority service in each time range, determining each transmission path corresponding to the priority service according to the required resource of the service with the priority in the time range counted in advance, the network link state of the satellite in the time range and the remaining resources to be allocated of the satellite.

2. The method of claim 1, further comprising:

determining the number or resource quantity of the priority service which can be transmitted by each transmission path corresponding to the priority service aiming at each priority service in each time range; and storing the corresponding relationship between each transmission path corresponding to the priority service and the identification information and the time range of the second source node and the second destination node, and the number or resource amount of the priority service which can be transmitted by each transmission path.

3. The method according to claim 1, wherein each transmission path corresponding to the priority service is determined according to the resource to be allocated, the network link status of the satellite in the time range, and the remaining resources to be allocated of the satellite:

and determining each transmission path corresponding to the service with the priority by adopting a Russian nesting doll or maximum allocation model according to the resource to be allocated, the network link state of the satellite in the time range and the remaining resource to be allocated of the satellite.

4. The method of claim 1, wherein the determining a target transmission path according to the priority of the service request, the identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority includes:

5. The method of claim 4, further comprising:

6. The method of claim 1, wherein the determining a target transmission path according to the priority of the service corresponding to the service request, the identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority includes:

7. The method according to claim 1, wherein if the target transmission path is not acquired, the method further comprises:

8. The method of claim 1 or 7, further comprising:

9. A data transmission apparatus, characterized in that the apparatus comprises:

a processing module, configured to determine a target transmission path according to a priority of a service corresponding to the service request, identification information of the first source node and the first destination node, the current time, and a pre-stored path mapping relationship corresponding to the service of each priority; transmitting the data of the service corresponding to the service request through the target transmission path;

the processing module is further configured to determine, for any pair of a second source node and a second destination node, routing information corresponding to the second source node and the second destination node in different time ranges by using a topology snapshot technology according to the operating cycles of the pair of the second source node, the second destination node, and the satellite; and for each priority service in each time range, determining each transmission path corresponding to the priority service according to the required resource of the service with the priority in the time range counted in advance, the network link state of the satellite in the time range and the remaining resources to be allocated of the satellite.

10. An electronic device, characterized in that the electronic device comprises at least a processor and a memory, the processor being adapted to perform the steps of the data transmission method according to any of claims 1-8 when executing a computer program stored in the memory.