CN113452431A - Method for optimizing satellite network data service by utilizing edge computing technology - Google Patents
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Abstract
The invention provides a method for optimizing satellite network data service by utilizing an edge computing technology, relating to the technical field of satellite communication; the method comprises the following steps: s10, adding edge calculation nodes, and adding the edge calculation nodes on the satellite terminal; s20, adding a service distribution node on the satellite main station, wherein the service distribution node is used for obtaining and caching media content from an internet server; s30, sending media contents, wherein a service distribution node of a satellite main station sends the media contents to a plurality of satellite terminals at the same time; s40, receiving and storing media content, wherein the edge computing node receives and stores the media content from the service distribution node, and pushes the media content to users in the local area network in a unicast mode; the invention has the beneficial effects that: the network experience of users can be improved, the satellite bandwidth utilization rate can be improved, and the value of a satellite communication system can be improved.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a method for optimizing satellite network data service by utilizing an edge computing technology.
Background
In satellite communication and other wireless communication technologies, the most precious resources are frequency and bandwidth resources, in recent years, a satellite communication network mainly improves the resource utilization rate and reduces end-to-end transmission delay by means of optimizing a radio frequency system, high and low orbit inter-satellite networking, accelerating data transmission and the like, and particularly, after a high-throughput satellite adopting spot beams is widely applied, although the frequency resource reuse aspect is greatly improved, the transmission delay between terminals is increased compared with that of the traditional satellite due to the characteristic of a star network architecture.
The existing technical scheme can reduce the transmission pressure of a backbone network, improve user experience and reduce transmission delay to a certain extent, but still has two defects, the first general edge computing technology does not subdivide service types and cannot optimize service transmission characteristics, and the first general edge computing technology is uniformly deployed on an edge computing platform under most of applications with great differences in network requirements, such as media push, smart home, industrial internet and the like, and is indiscriminately processed and transmitted; the second existing edge computing service transmission system does not fully utilize the characteristics of the satellite forward transmission technology, and still has large service redundancy in the aspect of air interface transmission.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a method for optimizing satellite network data services by utilizing an edge computing technology, so as to achieve the purposes of improving the utilization rate of satellite air interface bandwidth and improving user experience.
The technical scheme adopted by the invention for solving the technical problems is as follows: in a method of optimizing satellite network data traffic using edge computing techniques, the improvement comprising the steps of:
s10, adding edge calculation nodes, and adding the edge calculation nodes on the satellite terminal;
s20, adding a service distribution node on the satellite main station, wherein the service distribution node is used for obtaining and caching media content from an internet server;
s30, sending media content, wherein a service distribution node of a satellite main station broadcasts and sends the media content to a plurality of satellite terminals by utilizing the satellite multicast characteristic and the forward shared channel technology;
and S40, receiving and storing the media content, wherein the edge computing node receives and stores the media content from the service distribution node, and pushes the media content to the users in the local area network in a unicast mode.
Furthermore, the service distribution node comprises an attribute management module, a media duplicate removal and sending management module and a multicast channel mapping module which are connected in sequence;
the attribute management module is used for marking the basic attribute and the content attribute of the media data;
the media duplicate removal and sending management module is used for detecting whether the local media library contains the content imported by the video source or not and managing the successfully sent content and the successfully received terminal list;
and the multicast channel mapping module is used for mapping the media content to an air interface shared channel.
Further, basic attributes of media data include, but are not limited to, file type, creation time, file size, hash value, and heat;
the content attributes of the media data include, but are not limited to, sports, delicacies, effusions, and tricks.
Further, the air interface shared channel is managed by the user group and the system capacity control module together.
Further, the edge computing node comprises a push algorithm module and a local media storage module;
the local media storage module is used for storing the demodulated media data;
and the pushing algorithm module is configured by the system capability control module and realizes pushing of the media data.
Further, the demodulated media data includes media content, file attributes, and content attributes;
the pushing algorithm module completes pushing in the modes of emergency degree, popular media and advertisement content.
Further, in step S30, the service distribution node of the satellite master station distributes the service data to the satellite terminals in the beam administered by the satellite master station in the form of broadcast, multicast or unicast.
Further, in step S30, the service distribution node implements the transmission of the media content through the DVB-S2/S2X modulation technique of the high-throughput satellite baseband system.
The invention has the beneficial effects that: the service distribution node at the satellite main station can obtain and cache a large amount of data from an internet service server on one hand, and on the other hand, the service distribution node simultaneously transmits forward service data to a plurality of edge computing nodes at the terminal side by using the broadcasting and multicasting technology of the satellite in a form of sharing channels; the edge computing node mainly completes the functions of receiving forward broadcast service data and distributing the forward broadcast service data to users, and completes certain localized service processing according to service requests of the users; the network experience of users can be improved, the satellite bandwidth utilization rate can be improved, and the value of a satellite communication system can be improved.
Drawings
Fig. 1 is a flowchart illustrating a method for optimizing satellite network data services using edge computing techniques according to the present invention.
Fig. 2 is a schematic diagram of an application structure of the present invention in a conventional communication system.
Fig. 3 is a schematic structural diagram of a method for optimizing satellite network data services by using an edge computing technique according to the present invention.
FIG. 4 is a diagram of a first embodiment of the present invention.
Fig. 5 is a diagram of an embodiment of a push-like service application of the present invention.
Fig. 6 is a diagram of an embodiment of a real-time interactive service application of the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other.
The invention discloses a method for optimizing satellite network data service by utilizing edge computing technology, which combines the technical characteristics of a satellite communication network and MEC edge computing, solves the problem of transmission delay of partial service in the satellite communication network from the aspect of application service deployment form, enables a satellite communication network user to obtain the transmission quality similar to a land mobile communication network and a WIFI network, can effectively improve the bandwidth utilization rate of a satellite space section, saves satellite resources and creates more value for a satellite operator.
Referring to fig. 1, a method for optimizing satellite network data services by using an edge computing technique according to the present invention includes steps S10-S40, which is shown in fig. 2, and is an application structure diagram of the present invention in an existing communication system, specifically, the method includes the following steps:
s10, adding the service distribution node 20, and adding the service distribution node 20 on the satellite terminal;
s20, adding a service distribution node 10, wherein the service distribution node 10 is added to a satellite main station, and the service distribution node 10 is used for obtaining and caching media content from an internet server;
as shown in fig. 3, the service distribution node 10 includes an attribute management module 101, a media deduplication and transmission management module 102, and a multicast channel mapping module 103, which are connected in sequence; the function of each module is explained in detail in the embodiment:
an attribute management module 101, configured to implement marking of a basic attribute and a content attribute of media data; basic attributes of the media data include a file type, a creation time, a file size, a hash value, and a heat; the content attributes of the media data include sports, delicacies, efficiences, and little skill;
a media deduplication and transmission management module 102, configured to detect whether a local media library includes content imported by a video source, and at the same time, manage successfully transmitted content and a successfully received terminal list;
the multicast channel mapping module 103 is configured to map media content to an air interface shared channel, where in this embodiment, the air interface shared channel is managed by the user group 301 and the system capability control module 302.
In fig. 4, the system includes a resource capability unified scheduling control module 30, which implements unified scheduling control of resource capability, as can be understood by referring to fig. 2, the functions of the module are functions of the satellite master station and the satellite terminal, which can be understood as a set of functions of the satellite master station and the satellite terminal, and in this embodiment, the functions of the two are defined as the resource capability unified scheduling control module 30; the user group 301 and the system capability control module 302 are connected to the resource capability unified scheduling control module 30, wherein the user group 301 implements sending of service type, user VNO and connection state, and the system capability control module 302 implements functions of ACM, signal monitoring and coverage capability control.
Further, as shown in fig. 3, the service distribution node 20 includes a push algorithm module 201 and a local media storage module 202, where the local media storage module 202 is configured to store the demodulated media data; the push algorithm module 201 is configured by the system capability control module 302 to implement pushing of media data; wherein the demodulated media data comprises media content, file attributes, and content attributes; the push algorithm module 201 completes the push in the form of urgency, topical media, and advertising content.
S30, sending media content, wherein a service distribution node of a satellite main station broadcasts and sends the media content to a plurality of satellite terminals by utilizing the satellite multicast characteristic and the forward shared channel technology;
FIG. 4 is a schematic diagram of an embodiment of the present invention; in this embodiment, a service distribution node 10 of a satellite master station distributes service data to a satellite terminal in a beam administered by the satellite master station in the form of broadcast, multicast or unicast; the service distribution node 10 implements the transmission of the media content by the DVB-S2/S2X modulation technique of the high-throughput satellite baseband system, i.e. the physical frame format selection module 70 shown in fig. 3 in this embodiment.
S40, receiving and storing the media content, the service distribution node 20 receives and stores the media content from the service distribution node 10, and pushes the media content to the user in the local area network in a unicast manner.
The invention adds a service distribution node 20 and a service distribution node 10 in a satellite terminal and a satellite main station respectively, the service distribution node 10 positioned in the satellite main station can obtain and cache a large amount of data from an internet service server on one hand, and on the other hand, the service distribution node transmits forward service data to a plurality of service distribution nodes 20 positioned at the terminal side simultaneously in a form of sharing a channel by utilizing the broadcasting and multicasting technology of the satellite; the service distribution node 20 mainly completes the functions of receiving forward broadcast service data and distributing the data to users, and completes certain localized service processing according to the service request of the users; the network experience of users can be improved, the satellite bandwidth utilization rate can be improved, and the value of a satellite communication system can be improved.
With reference to fig. 3, the service distribution node 10 obtains data from the media stream, and implements the transmission of the media content through the processing of the attribute management module 101, the media deduplication and transmission management module 102, and the multicast channel mapping module 103, and the DVB-S2/S2X modulation technique of the high-throughput satellite baseband system; the waveform transmitting module 80 transmits to the waveform receiving module 60 via high-throughput satellite; after that, the data enters the service distribution node 20 through the multicast signal adjusting module 50 and the multicast service analyzing module 40 in sequence, and the media data is pushed by the service distribution node 20.
In the above embodiment of the present invention, the network architecture is composed of the service distribution node 20 and the service distribution node 10, and a service forwarding model is designed for the characteristics of the satellite channel on the architecture, and the service distribution node 20 can provide a localized network service for a user for deployed service applications, and interacts with a service application server of the internet only through a satellite link when necessary.
The service distribution node 20 provides a service deployment platform, and is applicable to service applications such as service content distribution, local interaction response, and online computing. The service distribution node 20 may receive, parse and store the service contents of the service distribution node 10 through multicast, broadcast and unicast; the service distribution node 20 may locally store and cache a large amount of media data, so as to alleviate the transmission waiting delay of the user through the satellite network, that is, in the waiting process of updating the local data of the satellite terminal, the service distribution node 20 may first push the media data stored in the local to the user, so that the user is insensitive to the satellite transmission time. The service distribution node 20 may provide a media data push service for the user, and may push media data to the user according to user preferences, advertisement strategies, and hot topics. The service distribution node 20 is provided with DNS identification capability to redirect services already deployed on the MEC platform to the local service system. The service distribution node 20 has the interactive capability with internet services, and supports the functions of user login agent, key synchronization, login state management and user data uploading agent. The service distribution node 20 has the interaction capability with the master service distribution node 10, and supports the functions of data state update, service data synchronization and user identity authentication data synchronization of both parties.
The service distribution node 10 is deployed in the master station, and is configured to distribute service data in the form of broadcast, multicast and unicast to all satellite terminals in the beam administered by the master station, where a data source of the service data is mainly a service server on the internet. The specific functions of the service distribution section are as follows: the service distribution node 10 ″ provides a service deployment platform, and is applicable to service application of service content distribution, local interaction response and online computing. The service distribution node 10 has the capability of multicast, broadcast and unicast, and can fill the service data from the internet into the forward common channel in the form of broadcast and multicast messages. The traffic distribution node 10 may communicate and forward network requests and responses between users and internet traffic services. The service distribution node 10 supports the general functions of distributed storage, load balancing and content management for CDN networks. The service distribution node 10 has a traffic charging function, and records broadcast and unicast traffic received by the satellite terminal.
In the application field of content push type services, the service distribution node 20 and the service distribution node 10 are a service distribution system designed according to the characteristics of a satellite network, and a service distribution model is designed by utilizing the characteristics of a satellite channel, so that the network transmission delay of part of services is reduced by utilizing the broadcasting function of the existing satellite communication network, and the user experience is improved; a typical flow is shown in fig. 5, and includes the following flows:
1) when the service distribution node 20 is deployed for the first time on the satellite terminal side, a certain amount of media content needs to be prestored in the node, and a DNS detection function is supported.
2) When a user uses network service for the first time, if network registration and login behaviors are required, login and registration are carried out through the MEC platform, the satellite link and the satellite main station, the validity period of identity authentication depends on specific application, and login and registration are carried out through the MEC platform, the satellite link and the satellite main station again after login information is invalid.
3) After the user registration is completed, the online state, login state and identity authentication information of the user are stored in the service distribution node 20 and the content distribution node.
4) When a user acquires media data, the service distribution node 20 firstly pushes local hot content, advertisement promotion or media content interested by the user to the user, and the network effect experienced by the user is the same as that of a land network, so that delay, packet loss retransmission and waiting of the content are avoided.
5) The content distribution node acquires service data from the Internet service and pushes the media content to all terminals in the jurisdiction range through the satellite broadcasting technology. The content distribution node records the online state and the distribution record of the satellite terminal, and the offline terminal completes data updating after the offline terminal is online next time.
6) When the content distribution node updates the local media content to the service distribution node 20, the service distribution node 20 still pushes the locally stored media content to the user, so as to eliminate the update waiting time of the user, and the content is stored locally after being updated, so as to push the latest content to the local user.
7) When the user has interactive behaviors of media pushing, article publishing, comment publishing and the like, the service distribution node 20 and the content distribution node complete the content submission process together, and the submitted service data flow is charged independently according to the user part.
In addition, as shown in fig. 6, the real-time interactive class mainly refers to an application that a result calculated and returned by the server is presented on a user interface or a user side is controlled to execute some actions each time a user operates. The applications are sensitive to time delay, cannot complete operations in a high-delay network or have poor user experience, for example, the user experience of applications such as online games in the high-delay network is poor, edge services can be deployed in the MEC for the applications, and real-time interaction of users is completed through local computing resources, as shown in fig. 6, the MEC transmits or applies for data to a data center only through a satellite link when necessary.
The invention provides a service deployment platform for traditional internet service or industry users by deploying the service distribution node 20 and the service distribution node 10, and can provide low-delay service application for end users by introducing the edge computing service of internet service providers or industry applications, particularly in a static orbit communication satellite system. The scheme is compatible and continues to use the existing satellite communication technology system, has no change to the satellite, and can not cause the increase of the satellite manufacturing cost.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A method for optimizing satellite network data traffic using edge computing techniques, the method comprising the steps of:
s10, adding edge calculation nodes, and adding the edge calculation nodes on the satellite terminal;
s20, adding a service distribution node on the satellite main station, wherein the service distribution node is used for obtaining and caching media content from an internet server;
s30, sending media content, wherein a service distribution node of a satellite main station broadcasts and sends the media content to a plurality of satellite terminals by utilizing the satellite multicast characteristic and the forward shared channel technology;
and S40, receiving and storing the media content, wherein the edge computing node receives and stores the media content from the service distribution node, and pushes the media content to the users in the local area network in a unicast mode.
2. The method for optimizing satellite network data service by using edge computing technology as claimed in claim 1, wherein the service distribution node comprises an attribute management module, a media deduplication and transmission management module and a multicast channel mapping module, which are connected in sequence;
the attribute management module is used for marking the basic attribute and the content attribute of the media data;
the media duplicate removal and sending management module is used for detecting whether the local media library contains the content imported by the video source or not and managing the successfully sent content and the successfully received terminal list;
and the multicast channel mapping module is used for mapping the media content to an air interface shared channel.
3. The method of claim 2, wherein the basic attributes of the media data include but are not limited to file type, creation time, file size, hash value, and heat;
the content attributes of the media data include, but are not limited to, sports, delicacies, effusions, and tricks.
4. The method of claim 2, wherein the air interface shared channel is managed by a user group and a system capability control module.
5. The method of claim 4, wherein the edge computing node comprises a push algorithm module and a local media storage module;
the local media storage module is used for storing the demodulated media data;
and the pushing algorithm module is configured by the system capability control module and realizes pushing of the media data.
6. The method of claim 5, wherein the demodulated media data comprises media content, file attributes, and content attributes;
the pushing algorithm module completes pushing in the modes of emergency degree, popular media and advertisement content.
7. The method of claim 1, wherein in step S30, the service distribution node of the satellite master station distributes the service data to the satellite terminals in the beam administered by the satellite master station in the form of broadcast, multicast or unicast.
8. The method for optimizing satellite network data services using edge computing technology as claimed in claim 7, wherein in step S30, the service distribution node implements the transmission of the media content through DVB-S2/S2X modulation technique of the high throughput satellite baseband system.
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