CN113709580B - Content delivery network system - Google Patents

Abstract

The invention discloses a content delivery network system. The system comprises: the system comprises a ground network system, a satellite network and a client side, wherein the ground network system is used for providing streaming media service for user equipment in a ground network coverage range, and sending first content delivery service information of the user equipment to the satellite network when the user equipment enters an electronic fence after a first preset time; the satellite network system is used for providing streaming media service for the user equipment entering the electronic fence through the satellite network according to the first content delivery service information, and sending second content delivery service information of the user equipment to the ground network system under the condition that the user equipment exits the electronic fence after the user equipment is determined to be in the second preset time; and the ground network system is also used for providing streaming media service for the user equipment exiting the electronic fence through the ground network according to the received second content delivery service information. According to the system provided by the embodiment of the invention, the continuity and the integrity of the user streaming media service can be ensured in the area which is not covered by the land network.

Description

Content Delivery Network System

technical field

The present invention relates to the field of communication technology, in particular to a content delivery network system.

Background technique

When streaming media services are provided on the network, a content delivery/distribution network (ContentDelivery/Distribution Network, CDN) can usually be used to implement. The content delivery/distribution network can add a new layer of network architecture to the network Internet, and publish the content of the website to the edge of the network (host, network application, etc.) closest to the user, so that the user can obtain the required content nearby and solve the Internet Network congestion, improve the response speed of users accessing the website.

However, the existing content delivery network can only provide the distribution capability based on the land network system, and the distribution service of streaming media is limited in areas not covered by the land network (rivers, lakes, seas, remote areas, mountainous areas, etc.).

Contents of the invention

Therefore, the present invention provides a content delivery network system to solve the problem in the prior art that streaming media distribution services are limited due to areas not covered by land networks.

In order to achieve the above object, the first aspect of the present invention provides a content delivery network system, including a terrestrial network system and a satellite network system, wherein the terrestrial network system is used to provide users with The device provides a streaming media service, and when it is determined that the user equipment enters the electronic fence after a first predetermined period of time, sends the acquired first content delivery service information of the user equipment to the satellite network, wherein the electronic fence includes a ground network coverage area outside the area; the satellite network system is used to deliver service information according to the received first content, provide streaming media services to user equipment entering the electronic fence through the satellite network, and determine that the user equipment exits the electronic fence after a second predetermined duration In this case, the acquired second content delivery service information of the user equipment is sent to the terrestrial network system; the terrestrial network system is also used to provide streaming media to the user equipment exiting the electronic fence through the terrestrial network according to the received second content delivery service information Serve.

The present invention has the following advantages: According to the content delivery network system in the embodiment of the present invention, the continuity and integrity of streaming media services for users can be guaranteed in areas not covered by land networks.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention.

FIG. 1 is a schematic structural diagram of a content delivery network system provided by an embodiment of the present invention;

FIG. 2 is a schematic block diagram of a content delivery network system provided by another embodiment of the present invention;

FIG. 3 is a schematic diagram of a scene of a content delivery network system provided by an embodiment of the present invention;

Fig. 4 shows a flow chart of handover between a ground network system and a satellite network system according to an embodiment of the present invention.

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by showing examples of the present invention.

It should be noted that, in this document, the terms "comprising", "comprising" or any other variation thereof are intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or apparatus. Without further limitations, an element defined by the statement "comprising..." does not exclude the presence of additional same elements in the process, method, article or device comprising said element.

In the embodiment of the present invention, the CDN can technically solve problems such as small network bandwidth, large user visits, and uneven distribution of network points, as well as solve the problem of slow response speed when users visit websites. CDN can be understood as a network construction method, which can release broadband rich media on the traditional IP network and a specially optimized network coverage layer. The key technologies of CDN include, for example, the following aspects: content distribution, which can publish content to the edge server closest to the user; content routing request, which can adopt CDN load balancing technology, through the redirection mechanism in the content router, in multiple User requests are balanced among edge servers so that user requests get responses from the nearest content source; load balancing can balance load traffic on edge servers according to content availability, server availability, and user conditions; and content storage management.

In some embodiments, the CDN can be built based on the terrestrial wired Internet or the operator's IP private network, that is, based on the operator's wired core network and transmission network, and can be accessed using wired access methods such as optical fiber or wireless The access method, for example, through the operator's base station, wireless fidelity (Wireless Fidelity, Wi-Fi) and other wireless access methods can be used in the home. Content delivery network systems are mostly land-based communication systems, and users are also fixed or mobile terminal devices on land.

In some embodiments, compared with terrestrial mobile communication networks, satellite communication can achieve wide-area or even global coverage by using high-, medium-, and low-orbit satellites, and can provide global users with indiscriminate communication services. Commercial mobile satellite communication systems such as Iridium, Inmarsat, and Thuraya provide effective solutions for applications such as maritime, emergency, and personal mobile communications; communication satellites Teledesic satellites, micro-nano satellites ( For example, OneWeb), space broadband network satellite Starlink and other low-orbit satellite constellations integrate satellite communication services with Internet services, injecting new vitality into the satellite communication industry. For example, Teledesic’s satellite-to-earth link is in the Ka band, and a 60GHz interstellar link is built between adjacent satellites on each orbital plane. Teledesic uses all-on-star processing and on-board switching, and the system is designed as an “air Internet” .

In some embodiments, the terrestrial fifth-generation mobile communications (5th Generation Mobile Networks, 5G) can have a relatively complete industrial chain, a huge user group, flexible and efficient application service models, and the like. Through the integration of the satellite communication system and 5G, learn from each other's strengths and complement each other, and jointly form an integrated integrated communication network covering sea, land, air and space that seamlessly covers the world, which can meet the various business needs of users everywhere, and is an important direction for future communication development. .

The existing satellite-based streaming media services usually can only provide broadcast streaming services, and cannot provide point-to-point personalized services; in addition, the existing broadcast streaming media services, the equipment receiving services are generally fixed, and fixed A single satellite provides services, and the same media program content cannot be continuously provided through multiple satellites.

In the embodiment of the present invention, the integration of satellite and 5G technology can give full play to their respective advantages and provide users with more comprehensive and high-quality services. Satellites can provide economical and reliable network services, extending the network to places where the ground network cannot reach; satellites can provide continuous and uninterrupted network connections for Internet of Things devices and mobile carrier users such as airplanes, ships, trains, and automobiles. The integration of satellites and 5G Finally, the service capabilities of the 5G system in this area can be greatly enhanced; the superior broadcast/multicast capabilities of satellites can provide efficient data distribution services for network edges and user equipment.

In order to better understand the present invention, the content delivery network system according to the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that these embodiments are not intended to limit the scope of the present invention.

FIG. 1 is a schematic diagram showing the structure of a content delivery network system according to an embodiment of the present invention. As shown in FIG. 1 , the content delivery network system 10 in the embodiment of the present invention may include a terrestrial network system 100 and a satellite network system 200 .

The terrestrial network system 100 is configured to provide streaming media services for user equipment through the terrestrial network within a preset terrestrial network coverage area, and send the acquired user equipment when it is determined that the user equipment enters the electronic fence after a first predetermined period of time. The first content of the device delivers service information to the satellite network, wherein the geo-fence includes an area outside the coverage of the terrestrial network.

The satellite network system 200 is configured to provide streaming media services to user equipment entering the electronic fence through the satellite network according to the received first content delivery service information, and when it is determined that the user equipment exits the electronic fence after a second predetermined duration, Send the acquired second content delivery service information of the user equipment to the terrestrial network system 100 .

The terrestrial network system 100 is further configured to, according to the received second content delivery service information, provide streaming media services to user equipment exiting the electronic fence through the terrestrial network.

In some embodiments, the electronic fence can be understood as the network coverage area indicated by the electronic map. In the embodiment of the present invention, the electronic fence may be used to indicate an area outside the coverage of the terrestrial network. For example, network operators can determine which locations have network coverage and which locations do not have network coverage according to their own network planning and base station settings, and draw an electronic map for this purpose. In the drawn electronic map, there will be no network coverage locations Surround it with a curved line, thus forming an electronic fence map; according to the pre-drawn electronic fence, since the area outside the fence has ground network coverage, broadband streaming services can be provided for user equipment located outside the fence; the area inside the fence Indicates that in areas where the terrestrial network system cannot provide real-time streaming media services, streaming media services can be provided through satellite networks.

In some embodiments, the electronic fence information can be sent to the dispatching service engine in advance, such as the ground dispatching service engine 102 and the satellite streaming media dispatching service engine 201; Among the target devices of the service, for example, the user device in a driving car. The ground scheduling service engine 102, the satellite streaming media scheduling service engine 201 and the user equipment store the geo-fence information for subsequent switching between the ground network system and the satellite network system providing services according to the geo-fence.

The content delivery network system according to the embodiment of the present invention includes a terrestrial content delivery network and a satellite content delivery network, and uses electronic fences to determine the switching of user equipment between the terrestrial content delivery network and the satellite content delivery network to ensure user streaming media services continuity and integrity.

Since the content delivery network system of the embodiment of the present invention can not only provide streaming media services for places with network coverage, when mobile user equipment enters a place without network coverage, it can continue to provide streaming media services uninterrupted through the satellite network, so , the architecture of the content delivery network system can be understood as a space-ground integrated and seamlessly connected streaming media service system architecture. Therefore, the content delivery network in the embodiment of the present invention can be called a space-ground integrated content Delivery network, the content delivery network switches between the terrestrial network system and the satellite network system to ensure the continuity and integrity of streaming media services for user equipment users, and realize real-time media delivery with full geographic coverage and seamless connection Internet service.

FIG. 2 is a schematic block diagram of a content delivery network system according to another embodiment of the present invention, and components in FIG. 2 that are the same as or equivalent to those in FIG. 1 use the same reference numerals. A content delivery network system according to another embodiment of the present invention will be described in detail below with reference to FIG. 2 .

As shown in Figure 2, the terrestrial network system 100 may include: a terrestrial wireless network base station 101, a ground dispatch service engine 102, a terrestrial streaming media storage server 103, a transmission network controller 104, an access network controller 105 and related network elements, network Edge node server 106 and ground satellite base station 111.

The satellite network system 200 includes: a satellite streaming media scheduling service engine 201 , a satellite streaming media transfer server 202 , a remote media storage server 203 , and multiple LEO satellites 204 .

In some embodiments, since the geostationary satellite is more than 30,000 kilometers away from the ground, the radio signal is transmitted through such a long distance, and the attenuation is severe; in addition, only a large receiving antenna on the ground can receive such a weak signal. Obviously, for the ground Mobile cars and mobile phones of walking people cannot achieve large receiving antennas. Therefore, in the embodiment of the present invention, LEO satellites are used to provide continuous services instead of using stationary satellites in high orbits to directly provide services without interruption, and media can be realized. The two-way interaction of services avoids that the traditional satellite network can only provide one-way streaming media services, which is in line with the development trend of future space-ground integrated streaming media service network technology.

But the present invention is not limited to the specific modules described above and shown in FIG. 2. In some embodiments, the ground network system 100 and the satellite network system 200 may only include some of the modules, that is, the ground network system 100 and satellite network system 200 may include more flexible module configurations, which will be described below in conjunction with specific embodiments.

In some embodiments, the first content delivery service information includes: identification information of the user equipment, location information of the user equipment before entering the electronic fence, movement speed and movement route before entering the electronic fence, and the stream being played before entering the electronic fence Streaming information for the media content.

The ground network system 100 may include: a ground wireless network base station 101, a ground dispatching service engine 102, a transmission network controller 104, and a ground satellite base station 111; the satellite network system 200 includes: a satellite streaming media dispatching service engine 201, a satellite streaming media transfer server 202 , a remote media storage server 203 , a plurality of low earth orbit satellites 204 .

Wherein, the terrestrial wireless network base station 101 is configured to provide streaming media services for user equipment within the network coverage of its own base station.

The ground dispatching service engine 102 is used to calculate the time node when the user equipment enters the electronic fence according to the movement speed and the movement route before the user equipment enters the electronic fence, and the time node when the current time distance enters the electronic fence is greater than or equal to the first predetermined duration In this case, the device identifier of the user equipment, the location information before entering the electronic fence, the streaming media information before entering the electronic fence, and the time node of entering the electronic fence are sent to the transmission network controller 104 .

The transmission network controller 104 is used to send the received device identification of the user equipment, location information before entering the electronic fence, streaming media information before entering the electronic fence, and the time node of entering the electronic fence to the satellite through the ground satellite base station 111 Streaming media scheduling service engine 201.

The satellite streaming media scheduling service engine 201 is used to inquire whether the remote media storage server 203 stores the streaming media content being played before the user equipment enters the electronic fence, if the streaming media content being played before entering the electronic fence is not stored, Then by dispatching the satellite streaming media transfer server 202 and the low earth orbit satellite 204 to provide the streaming media service for the user equipment, and, if the streaming media content being played before entering the electronic fence is stored, then by dispatching the remote media storage server 203 for The user equipment provides streaming media services.

In this embodiment, the ground dispatching service engine can send the user equipment's identification information, location information, and the time when the streaming media information enters the electronic fence to the satellite streaming media dispatching service engine before the user equipment enters the electronic fence; The scheduling service engine inquires whether there is streaming media content being played before the user equipment enters the electronic fence stored on the remote media storage server, and provides corresponding streaming media services according to the query results, so that after the user equipment leaves the network coverage of the ground network system, Through the satellite network system, continue to provide streaming media services to user equipment without interruption.

Continuing to refer to FIG. 2 , in some embodiments, the satellite streaming media scheduling service engine 201 is configured to send a first notification message to Satellite streaming media relay server 202.

The satellite streaming media relay server 202 is configured to, in response to the first notification message, calculate the low-earth orbit satellite 204 closest to the user equipment among the plurality of low-earth orbit satellites 204 .

The nearest low-earth orbit satellite 204 is used to perform device identity verification according to the obtained identification information of the user equipment, and when the device identity verification is successful, send a second notification message to the satellite streaming media scheduling service engine 201 for use in The satellite streaming media scheduling service engine 201 is notified to provide the user equipment with the connection service of the streaming media service by its own orbiting satellite.

The satellite streaming media scheduling service engine 201 is also used to send a corresponding third notification message to the ground scheduling service engine 102 according to the service type of the streaming media service, and the third notification message includes the service type and the information of the nearest low earth orbit satellite 204 Identification information.

The ground dispatching service engine 102 is configured to respond to the third notification message, determine the first streaming media service time node corresponding to the time node when the user equipment enters the electronic fence, and send the media content after the first streaming media service time node in the streaming media content As the first continuous media content, and in a manner corresponding to the service type, the first continuous media content is sent to the low earth orbit satellite 204 closest to the user equipment.

The nearest low-earth orbit satellite 204 is also used to send the first continuous media content to the user equipment, so that the user equipment plays the streaming media content according to the first continuous media content after entering the geo-fence.

In this embodiment, multiple low-earth orbit satellites can be used to provide streaming media services for user equipment in the ground network system, and geosynchronous satellites (such as high-orbit satellites) or geostationary orbit satellites can be used to complete and implement the embodiment of the present invention. The functions of satellite streaming media scheduling service engine and satellite streaming media relay server.

When it is found that the streaming media content being played by the user equipment is not stored on the remote media storage server, the streaming media service connection service may be provided for the user equipment through the nearest low-earth orbit satellite to the user equipment.

Continuing to refer to FIG. 2 , in some embodiments, the terrestrial network system 100 further includes: a terrestrial streaming media storage server 103 .

If the service type is an on-demand service, the ground dispatching service engine 102, when being used to send the first continuous media content to the low earth orbit satellite 204 closest to the user equipment in a manner corresponding to the service type, is specifically used to: Scheduling the terrestrial streaming media storage server 103 to send the first continuous media content to the satellite streaming media relay server 202; the satellite streaming media relay server 202 sends the received first continuous media content to the nearest low earth orbit satellite 204.

If the service type is a live broadcast service, the ground dispatching service engine 102, when being used to send the first continuous media content to the low earth orbit satellite 204 closest to the user equipment in a manner corresponding to the service type, is specifically used to: The terrestrial streaming media storage server 103 is dispatched to send the first continuous media content to the nearest low earth orbit satellite 204 .

In this embodiment, the ground scheduling service engine can send the first continuous media content to the nearest low earth orbit satellite from the user equipment through the satellite streaming media relay server according to the on-demand service in the service type; according to the live broadcast service in the service type , to directly send the first continuous media content to the nearest low-earth orbit satellite, so as to ensure the continuity of streaming media for users, and complete user-on-demand and live broadcast services without interruption.

In some embodiments, when the nearest low-earth orbit satellite 204 is used to perform device identity verification according to the obtained identification information of the user equipment, it is specifically used to: provide connection services according to the permission from the satellite streaming media scheduling service engine 201 If the client information that is allowed to provide the connection service includes the identification information of the user equipment, it is determined that the device identity verification of the user equipment is successful.

In this embodiment, when it is determined that the identity verification of the user equipment is successful, the connection service is provided for the user equipment to ensure data security during the service process and the legitimate rights and interests of the user of the streaming media connection service.

In some embodiments, the satellite network system 200 further includes a plurality of remote media storage servers 203 .

The satellite streaming media scheduling service engine 201 is used to use the remote media storage server 203 that has been queried and stores the streaming media content that the user equipment is playing before entering the electronic fence as the designated remote media storage server 203, and determine that the user equipment enters the electronic fence. The second streaming media service time node corresponding to the time node of the geo-fence sends a fourth notification message to the designated remote media storage server 203, the second streaming media service time node in the fourth notification message.

The designated remote media storage server 203 is used to use the media content after the second streaming service time node in the streaming media content being played in its own storage as the second continuation media content, and send the second continuation media content to the The designated remote media storage server 203 corresponds to the low earth orbit satellite 204 .

The low earth orbit satellite 204 corresponding to the designated remote media storage server 203 is used to send the second continuous media content to the user equipment, so that the user equipment can play the streaming media content according to the second continuous media content after entering the electronic fence .

In the embodiment of the present invention, unlike the current one-way streaming media broadcasting system, remote communities, mountainous areas, remote schools, hospitals and other areas can not only receive streaming media services, but also upload local audio and video services and programs, Therefore, these places can all become edge nodes and place storage servers to obtain the remote media storage server in the embodiment of the present invention.

In this embodiment, when the satellite streaming media scheduling service engine inquires about the streaming media content being played by the user equipment stored on the remote media storage server, the streaming media content stored by the remote media storage server itself is used to enter the electronic fence user equipment. Provide media connection service.

In some embodiments, the second content delivery service information includes: identification information of the user equipment, location information of the user equipment before exiting the electronic fence, movement speed and movement route before exiting the electronic fence, and the stream being played before exiting the electronic fence Streaming information for the media content.

The ground network system 100 includes: a ground dispatching service engine 102 and a ground streaming media storage server 103; the satellite network system 200 includes: a satellite streaming media dispatching service engine 201, a satellite streaming media transfer server 202, a remote media storage server 203, a plurality of low-earth Orbit satellite 204.

The satellite streaming media scheduling service engine 201 is used to calculate the time when the user equipment exits the electronic fence and the corresponding third streaming service time node according to the speed and route of the user equipment before exiting the electronic fence, and exit the electronic fence at the current time distance When the time is greater than or equal to the second predetermined duration, a fifth notification message is sent to the ground dispatching service engine 102. The fifth notification message includes the streaming media information of the streaming media content being played before the user equipment exits the electronic fence and the third Time node of streaming media service.

The ground dispatching service engine 102 is used to respond to the fifth notification message and query whether the streaming media content being played before the user equipment exits the electronic fence is stored in the ground streaming media storage server 103. Streaming media content, then scheduling terrestrial streaming media storage server 103 provides streaming media service for user equipment, and, if the streaming media content that is playing before exiting the electric fence is inquired, then send the sixth to the satellite streaming media dispatching service engine 201 The notification message is used to notify the satellite streaming media scheduling service engine 201 to schedule the satellite streaming media relay server 202 and the first low earth orbit satellite 204 to provide streaming media services for the user equipment.

In this embodiment, the ground dispatching service engine can store the streaming media content being played in the ground streaming media storage server according to the streaming media information and the streaming service time node of the streaming media content being played before the user equipment exits the electronic fence. In this case, the ground streaming media storage server provides the streaming media service for the user equipment; if the streaming media content being played is not stored in the ground streaming media storage server, the low earth orbit satellite provides the streaming media service for the user equipment, To ensure the continuity of users using streaming media.

In some embodiments, the ground network system 100 further includes: a transmission network controller 104 , an access network controller 105 and related network elements, and multiple network edge node servers 106 .

The ground dispatching service engine 102, when used to dispatch the ground streaming media storage server 103 to provide streaming media services for the user equipment, is specifically used to: notify the transmission network controller 104, the access network controller 105 and related network elements to pre-register for the user equipment. Reserve links and bandwidth resources, and notify the terrestrial streaming media storage server 103 to push the third continuation of the media content to the network edge node server 106 closest to the user equipment among the plurality of network edge node servers 106, wherein the third continuation of the media content For the media content after the third streaming media service time node in the streaming media content being played before the user equipment exits the electronic fence stored by the terrestrial streaming media storage server 103; the network edge node server closest to the user equipment is used to The reserved links and bandwidth resources are used to provide streaming media services for the user equipment according to the third connected media content.

In this embodiment, when the terrestrial dispatching service engine dispatches the terrestrial streaming media storage server to provide streaming media services for the user equipment, it needs to reserve links and bandwidth resources for the user equipment, and notify the terrestrial streaming media storage server to push the next media content To the network edge node server closest to the user equipment to ensure the continuity of the user's use of streaming media.

In some embodiments, the satellite streaming media scheduling service engine 201 is configured to respond to the sixth notification message, by scheduling the satellite streaming media relay server 202 to determine the low earth orbit satellite 204 that is currently communicating with the user equipment and the closest distance to the user equipment as The first low-earth orbit satellite 204, and sends a seventh notification message to the first low-earth orbit satellite 204, the seventh notification message includes the streaming media information before the user equipment exits the electronic fence and the third streaming media service time node.

The first low-earth orbit satellite 204 is used to respond to the seventh notification message and send the fourth continuous media content to the ground streaming media storage server 103. The fourth continuous media content is the user currently using in the first low-earth orbit satellite 204 Among the streaming media content being played before the device exits the geo-fence, the media content after the time node of the third streaming media service.

The terrestrial streaming media storage server 103 pushes the received fourth continuous media content to the network edge node server closest to the user equipment.

The network edge node server closest to the user equipment is configured to provide streaming media services for the user equipment according to the fourth connection media content according to the reserved link and bandwidth resources.

In this embodiment, the satellite streaming media transfer server 202, under the scheduling of the satellite streaming media scheduling service engine 102, determines the low-earth orbit satellite that is currently communicating with the user equipment and is the closest to the user equipment, so as to pass through the low-earth orbit satellite After the user equipment exits the electronic fence, the streaming media service is provided for the user equipment to ensure the continuity of the user's use of streaming media.

In some embodiments, the ground network system 100 includes: a ground scheduling service engine 102 and a ground streaming media storage server 103; the satellite network system 200 includes: a satellite streaming media scheduling service engine 201, a satellite streaming media transfer server 202, and a remote media storage server 203.

Wherein, the satellite streaming media scheduling service engine 201 is configured to send a media content query message to the remote media storage server 203 .

The remote media storage server 203 is configured to send the existing media content information stored in its own server to the satellite streaming media scheduling service engine 201 in response to the media content query message.

The satellite streaming media dispatching service engine 201 is also used to send the first transfer control information to the ground dispatching service engine 102 when it is determined that the load status of the satellite streaming media transfer server 202 is not overloaded, and the first transfer control information includes The identification information of the satellite streaming media relay server 202 and the existing media content information.

The ground dispatch service engine 102 is used to respond to the first transfer control information, generate plan push information according to existing media content information, and send the plan push information and the identification information of the satellite streaming media transfer server 202 to the ground streaming media storage server 103, The planned push information includes the hotspot information in the pre-generated media hotspot information except the existing media content information.

The terrestrial streaming media storage server 103 is configured to send the media content corresponding to the planned push information to the satellite streaming media transfer server 202 .

The satellite streaming media transfer server 202 is configured to send the media content involved in the planned push information to the remote media storage server 203 .

In this embodiment, in order to shorten the end-to-end delay and optimize and balance the streaming media load of each node, you can choose a place with certain conditions and set up a remote media storage server, such as power supply, regular maintenance and geographical location good. The remote media storage server can be connected with the satellite antenna transmitter, and according to the scheduling of the satellite streaming media scheduling service engine, the hot content in other places (including in the cable network) is stored locally. The stored media content can include, for example: hot media content, important media content, and content that the public likes, etc. When other nodes in remote areas have needs, these needs can be met through satellites, that is, these remote media storage servers can receive media content Save and provide services to users in other regions. Therefore, the remote media storage server can be a network node in the CDN system, and can only store hot content, but not all content, and only the terrestrial streaming media storage server stores all content. The satellite streaming media scheduling service engine can be used as the scheduling service engine for the entire remote area.

In some embodiments, the streaming media service system of the present application adopts cloud storage, and since distributed processing and parallel computing are adopted, requests for streaming services can be centrally controlled through a distributed scheduling service engine.

In some embodiments, the satellite network system 200 also includes a second low earth orbit satellite 204 .

The satellite streaming media dispatching service engine 201 is also used to send the second transfer control information to the ground dispatching service engine 102 when it is determined that the load status of the satellite streaming media transfer server 202 is overloaded, and the second transfer control information includes the first The identification information of the second low earth orbit satellite 204 and the existing media content information. The second low earth orbit satellite 204 is a pre-designated low earth orbit satellite 204 for communicating with the remote media storage server 203 .

The ground dispatch service engine 102 is used to respond to the second transfer control information, generate planned push information according to the existing media content information, and send the planned pushed information and the identification information of the second low earth orbit satellite 204 to the ground streaming media storage server 103 .

The ground streaming media storage server 103 is configured to send the media content corresponding to the planned push information to the second low earth orbit satellite 204 .

The second low earth orbit satellite 204 is configured to send the media content involved in the planned push information to the remote media storage server 203 .

In this embodiment, according to the arrangement and control of the satellite streaming media scheduling service engine, when the satellite streaming media transfer server is overloaded, the ground streaming media storage server can directly send the media content to the low earth orbit satellite, and the low earth orbit satellite Transfer the media content involved in the planned push information.

The content delivery network system of the embodiment of the present invention can be based on low-orbit communication satellites and the existing CDN on the ground. Aiming at the fact that the existing CDN cannot meet the real-time streaming media service needs of users in sky, ocean, remote areas, and mountainous areas, a space-ground integration is proposed. China's content delivery network, including terrestrial content delivery network and satellite content delivery network, uses electronic fences to determine whether users switch between ground and sky CDN networks, ensuring the continuity and integrity of user streaming media services, and realizing global geographic coverage Azimuth coverage and seamless real-time media delivery network services.

Fig. 3 shows a schematic diagram of a scene of a content delivery network system in an embodiment of the present invention; Fig. 4 shows a flow chart of switching between a ground network system and a satellite network system in an embodiment of the present invention; Fig. 3 is the same as that in Fig. 1 and Fig. 2 or Identical components use the same reference numerals. The content delivery network system and the overall working process of the content delivery network system in the embodiment of the present invention will be described based on the space-ground integrated content delivery network system in the embodiment of the present invention with reference to FIG. 3 and FIG. 3 and FIG.

In FIG. 3 , the mobile architecture may further include: an operation support system server 107, an optical line terminal (Optical Line Terminal, OLT) 108, a core network switch 109, user equipment 110, and a ground satellite base station 111. Exemplarily, the LEO satellite 204 may include, for example, a LEO satellite 204-1, a LEO satellite 204-2, a LEO satellite 204-3, . . . , and a LEO satellite 204-n, where n is an integer greater than or equal to 1.

Wherein, the ground network system 100 in this architecture can be controlled by using the SDN architecture, the transmission network controller 104 of the metropolitan area is connected to the access network controller 105, and the access network controller 105 is also connected to the server 107 of the operation support system . The operation support system server 107 can realize the operation requirements such as authentication authentication and billing to the user identity; the access network controller 105 is connected with the ground dispatching service engine 102, and the ground dispatching service engine 102 also includes an electronic program guide (Electronic Program Guide, EPG) server, the EPG may be the initial interface content presented to the user by the Internet Protocol Television (IPTV) service.

In Fig. 3, OLT 108 can provide the network side interface of the optical access network and the terminal equipment connected to the optical fiber trunk line, for example, the ground access user equipment 110 and the user equipment 110 outside the electronic fence and located on the driving car, the core network switch 109 is a switch of the backbone part of the ground network system.

The ground satellite base station 111 can provide a data transmission channel between the ground network system 100 and the satellite network system 200 .

It should be understood that the types and numbers of devices included in the architecture of FIG. 3 are only illustrative, and can be flexibly adjusted according to actual application requirements.

In the embodiment of the present invention, the ground network system 100, that is, the ground communication system (that is, the ground network) can implement unified control and management of various heterogeneous access networks through the interfaces and protocols defined by SDN, and the centralized dynamic control mechanism . Compared with the traditional artificial network management system, the SDN-based ground network system is more flexible, and can realize wired and wireless integrated access to meet the needs of network integration. The access network controller 105 and related network elements can realize the control and management of each user's access to the network, determine the path and bandwidth of the access layer for each streaming media service, and propose to the metro transmission network according to the user's request. Links and bandwidth reserve resources and determine transmission paths for this purpose.

In FIG. 3 , when the driving car is outside the pre-drawn electronic fence, that is, the user equipment 110 on the driving car is within the coverage of the terrestrial network, the reception and service of streaming media content can be completed through the terrestrial wireless network base station 101 . When the driving car moves into the pre-drawn electronic fence, that is, when the user equipment 110 on the driving car is not covered by the terrestrial network, the service needs to be provided through the satellite network.

Therefore, the ground dispatching service engine 102 needs to have an electronic fence (map) first, and the part in the fence represents the area where the ground network cannot provide real-time streaming media services, and the electronic fence is sent to the ground dispatching service engine 102 for storage. At the same time, it is also sent to objects that require space-ground integrated services, such as the user equipment 110 on a driving car. At present, LEO satellites are developing rapidly. The system can provide broadband services with a capacity of up to 1Gbps per user, and the delay can be controlled between 25ms and 35ms, which can meet the bandwidth requirements of users' media on demand.

Referring to FIG. 4 , the network switching process in the embodiment of the present invention may include the following steps.

S401. Within a preset terrestrial network coverage area, provide a streaming media service for a user equipment through a terrestrial fixed-mobile network.

Exemplarily, the terrestrial fixed-mobile network includes a fixed telephone network (fixed network) and a mobile Internet (mobile network). The driving car may be a car driving on a highway. Currently, the user equipment 110 on the car is within the coverage of the terrestrial fixed-mobile network. Therefore, the user equipment 110 on the car can interact with the terrestrial wireless network base station 101, such as a 5G network base station, to obtain Media Content Services.

S402. The ground network system judges whether the user equipment enters the electronic fence after a first predetermined period of time. If yes, execute S403. If not, continue to execute S401.

Exemplarily, during the driving of the car, the user equipment 110 on the car may continuously upload the current location information to the ground dispatching service engine 102. Since the user equipment 110 is located on the driving car, the current location of the user equipment 110 is also the The current driving position of the car where the device 110 is located. In this embodiment, the ground dispatch service engine 102 compares the current driving position of the car with the electronic fence map, and can determine the time required for the user equipment 110 in the car to enter the electronic fence according to the moving route and speed of the car, so that it can be judged Whether the user equipment enters the geo-fence after a first predetermined period of time.

S403, the satellite network system provides a streaming media service to the user equipment entering the electronic fence through the satellite network.

Exemplarily, at a certain time before the car enters the fence, for example, in the first 3 minutes before the car enters the fence, the ground dispatching service engine 102 sends the identification information of the user equipment 110, the location information of the car, the name and serial number of the program being requested and other information are sent to the transmission network controller 104, and these information are sent to the satellite streaming media scheduling service engine 201 through the ground satellite base station 111, and the satellite streaming media scheduling service engine 201 inquires whether there is a user equipment on the car on the remote media storage server 203 110 required for streaming content.

In the first case of the query result, if there is no streaming media content required by the user equipment 110 on the remote media storage server 203, the satellite streaming media dispatching service engine 201 notifies the ground dispatching service engine 102, so that the ground dispatching service engine 102 will The streaming media content required by the user equipment 110 on the car is sent to the satellite streaming media transfer server 202 in advance through the ground satellite base station 111, and the media content of the specified duration before the user equipment 110 enters the fence can be saved in advance, and the specified duration can be greater than or equal to zero , and less than or equal to the first predetermined duration (the user equipment enters the electronic fence after the first predetermined duration); the satellite streaming media scheduling service engine 201 controls the satellite streaming media transfer server 202 to calculate the nearest LEO satellite 204 from the user equipment 110 , and establish contact with the user equipment 110 on the ground vehicle according to the nearest LEO satellite 204, and obtain information such as the position and device ID of the ground vehicle where the user equipment 110 is located. In addition, the LEO satellite 204 and the satellite streaming media scheduling service engine 201 perform Interaction, obtaining ground customer information from the satellite streaming media scheduling service engine 201 that needs to provide connection services, and comparing these ground customer information with the ground customer information indicated by the device ID received by itself, so as to check the user equipment 110 performs device identity verification, and if the device identity is verified, determine to provide the connection service for the user device 110 .

For example, the user equipment 110 on the car driving on the edge of the electronic fence establishes a session with the LEO satellite 204-3, and the LEO satellite 204-3 can receive the time node when the user equipment 110 enters the electronic fence sent by the ground dispatching service engine, Or, the LEO satellite 204-3 can calculate the time node when the user equipment 110 enters the electronic fence through the motion speed and the motion route uploaded by the user equipment 110 on the car, so that the LEO satellite 204-3 can determine the vehicle where the user equipment 110 is located. When about to enter the electronic fence (after the first predetermined duration), send the device ID of the user equipment 110 to the satellite streaming media scheduling service engine 201, to notify the satellite streaming media scheduling service engine 201 to be the user equipment indicated by the specific ID ( The device ID of user equipment 110) provides connection service, and satellite streaming media scheduling service engine 201 notifies satellite streaming media transfer server 202, and the streaming media content to be connected is sent to LEO satellite 204-3 by satellite streaming media transfer server 202, and LEO satellite 204 -3 forwarding the received streaming media content to the user equipment 110 indicated by the specific ID on the ground, thereby caching the streaming media content on the user equipment 110, and the user equipment 110 of the specific ID combines the received streaming media content with The streaming media content currently in use is compared with the playback progress to ensure the continuity and integrity of the content playback. In the embodiment of the present invention, the user equipment 110 or the car where the user equipment 110 is located can receive information sent by the ground wireless base station and the information sent by the satellite receiving antenna, and can communicate with the ground wireless base station and the communication with the satellite receiving antenna. to switch between.

In the second case of the query result, if the remote media storage server 203 has the media content that the user equipment 110 needs to play, the satellite streaming media scheduling service engine 201 notifies the remote media storage server 203 on the ground to send the relevant media content Send to a designated satellite, such as LEO 2, and then LEO 2 sends the continuous media content to the user equipment 110 on the ground mobile vehicle, so that the streaming media content service played by the user equipment 110 on the ground mobile vehicle can be completed continuity and integrity.

S404. The satellite network system judges whether the user equipment leaves the electronic fence after a second predetermined time period. If yes, execute S401. If not, continue to execute S403.

Wherein, the second predetermined duration and the first predetermined duration may be the same or different. Specifically, it may be set according to actual conditions, and is not specifically limited in this embodiment of the present invention.

Through the above steps S301-S304, through the switching between the ground network system and the satellite network system, a space-ground integrated and seamless streaming media service system architecture can be provided for ground user equipment, not only providing streaming service for places with network coverage Media service, when a moving object/user equipment enters a place without network coverage, the user equipment can continue to provide uninterrupted streaming media services through the satellite network.

According to the embodiment of the present disclosure, the space-ground integrated content delivery network can meet the streaming media service requirements in remote areas that cannot be covered by the terrestrial 5G network, on airplanes or on ocean-going ships, and can also be used for Internet of Things devices, ships, trains, cars, etc. Mobile carrier users provide continuous and uninterrupted network connection and streaming services, so that through the terrestrial content delivery network and satellite content delivery network, electronic fences are used to determine the switching of user equipment between the terrestrial CDN network and the sky CDN network to ensure user streaming The continuity and integrity of the media service realizes the full geographical coverage and seamless media delivery network service.

It should be clear that the present invention is not limited to the specific configurations and processes described in the above embodiments and shown in the drawings. For the convenience and brevity of description, detailed descriptions of known methods are omitted here, and the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments, and are not repeated here.

According to an embodiment of the present invention, the processes described above with reference to the flowcharts may be implemented as computer software programs. For example, embodiments of the present invention include a computer program product comprising a computer program tangibly embodied on a machine-readable medium, the computer program comprising program code for performing the methods shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network, and/or from a removable storage medium.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented using software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions, which, when run on a computer, cause the computer to execute the methods described in the above-mentioned embodiments. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present invention are produced in whole or in part. A computer can be a general purpose computer, special purpose computer, computer network, or other programmable device. Computer instructions can be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, computer instructions can be transmitted from a website, computer, server or data center by wire (such as Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.) to another website site, computer, server, or data center. The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server, a data center, etc. integrated with one or more available media. Usable media may be magnetic media, (eg, floppy disks, hard disks, tapes), optical media (eg, DVD), or semiconductor media (eg, solid state drives), among others.

The device embodiments described above are only illustrative, and 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 can also be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative efforts.

It can be understood that, the above embodiments are only exemplary embodiments adopted for illustrating the principle of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also regarded as the protection scope of the present invention.

Claims (11)

1. A content delivery network system comprising a terrestrial network system and a satellite network system, wherein,

the ground network system is used for providing streaming media service for user equipment through a ground network in a preset ground network coverage range, and sending acquired first content delivery service information of the user equipment to the satellite network under the condition that the user equipment enters an electronic fence after a first preset time is determined, wherein the electronic fence comprises an area outside the ground network coverage range;

the satellite network system is configured to provide streaming media services for the user equipment entering the electronic fence through a satellite network according to the received first content delivery service information, and send the obtained second content delivery service information of the user equipment to the ground network system under the condition that it is determined that the user equipment exits the electronic fence after a second predetermined time period;

the ground network system is further used for providing streaming media service for the user equipment exiting the electronic fence through a ground network according to the received second content delivery service information; the satellite network system includes: the system comprises a satellite streaming media scheduling service engine, a satellite streaming media transfer server, a remote media storage server and a plurality of low earth orbit satellites;

the satellite streaming media scheduling service engine is used for controlling the satellite streaming media transfer server to calculate a low-earth orbit satellite closest to the user equipment under the condition that the streaming media content which is played before entering the electronic fence is not stored in the remote media storage server;

the low earth orbit satellite closest to the satellite is used for sending a corresponding second notification message to the satellite streaming media scheduling service engine under the condition that the user equipment is determined to provide the continuing service;

the satellite streaming media scheduling service engine is also used for sending a corresponding third notification message to the ground scheduling service engine according to the service type of the streaming media service; the ground scheduling service engine is configured to determine, in response to the third notification message, a first streaming media service time node corresponding to a time node when the user equipment enters the electronic fence, use media content subsequent to the first streaming media service time node in the streaming media content as first continuing media content, and send the first continuing media content to a low-earth orbit satellite closest to the user equipment in a manner corresponding to the service type; the low-earth orbit satellite closest to the low-earth orbit satellite is further configured to send the first continuing media content to the user equipment, so that the user equipment plays the streaming media content according to the first continuing media content after entering the electronic fence.

2. The system of claim 1,

the first content delivery service information includes: the identification information of the user equipment, the position information of the user equipment before entering the electronic fence, the movement speed and the movement route before entering the electronic fence, and the streaming media information of the streaming media content which is being played before entering the electronic fence;

the ground network system includes: the system comprises a ground wireless network base station, a ground scheduling service engine, a transmission network controller and a ground satellite base station; wherein,

the ground wireless network base station is used for providing streaming media service for the user equipment within the network coverage range of the base station;

the ground scheduling service engine is configured to calculate a time node when the user equipment enters the electronic fence according to the movement speed and the movement route before the user equipment enters the electronic fence, and send the equipment identifier of the user equipment, the location information before the user equipment enters the electronic fence, the streaming media information before the user equipment enters the electronic fence, and the time node when the user equipment enters the electronic fence to the transmission network controller when the current time is greater than or equal to the first predetermined time;

the transmission network controller is configured to send the received device identifier of the user equipment, the location information before entering the electronic fence, the streaming media information before entering the electronic fence, and the time node when entering the electronic fence to the satellite streaming media scheduling service engine through the ground satellite base station;

the satellite streaming media scheduling service engine is configured to query whether the remote media storage server stores streaming media content that is being played before the user equipment enters the electronic fence, and provide streaming media service for the user equipment by scheduling the remote media storage server if the remote media storage server queries that the streaming media content that is being played before the user equipment enters the electronic fence is stored.

3. The system of claim 2,

the satellite streaming media scheduling service engine is used for sending a first notification message to the satellite streaming media transfer server under the condition that the streaming media content played by the user equipment is not stored on the remote media storage server;

the satellite streaming media transfer server is used for responding to the first notification message and calculating a low-earth orbit satellite which is closest to the user equipment in the plurality of low-earth orbit satellites;

the low-earth orbit satellite closest to the satellite is further used for carrying out equipment identity authentication according to the acquired identification information of the user equipment, and sending the second notification message to the satellite streaming media scheduling service engine under the condition that the equipment identity authentication is successful;

the third notification message includes the service type and identification information of the nearest low earth orbit satellite.

4. The system of claim 3, wherein the ground network system further comprises: a ground streaming media storage server;

if the service type is on-demand service, then:

the terrestrial scheduling service engine, when configured to send the first continuing media content to the low-earth orbit satellite closest to the user equipment in a manner corresponding to the service type, is specifically configured to: the first continuous media content is sent to the satellite streaming media transfer server by scheduling the ground streaming media storage server;

the satellite streaming media transfer server sends the received first continuous media content to the low earth orbit satellite closest to the satellite;

if the service type is live broadcast service, then:

the terrestrial scheduling service engine, when configured to send the first continuing media content to the low-earth orbit satellite closest to the user equipment in a manner corresponding to the service type, is specifically configured to: and sending the first continuous media content to the low-earth orbit satellite closest to the ground streaming media storage server by scheduling.

5. The system of claim 3,

the low earth orbit satellite closest to the user equipment is specifically configured to, when configured to perform equipment identity authentication according to the acquired identification information of the user equipment:

and if the customer information allowing the provision of the continuous service contains the identification information of the user equipment, determining that the equipment identity verification of the user equipment is successful according to the customer information allowing the provision of the continuous service from the satellite streaming media scheduling service engine.

6. The system of claim 3,

the satellite network system further comprises a plurality of remote media storage servers;

the satellite streaming media scheduling service engine is configured to use the queried remote media storage server, which stores streaming media content being played by the user equipment before entering the electronic fence, as an appointed remote media storage server, determine a second streaming media service time node corresponding to a time node when the user equipment enters the electronic fence, and send a fourth notification message to the appointed remote media storage server, where the second streaming media service time node in the fourth notification message;

the appointed remote media storage server is used for taking the media content behind a second streaming media service time node in the currently played streaming media content stored by the appointed remote media storage server as a second continuous media content and sending the second continuous media content to a low earth orbit satellite corresponding to the appointed remote media storage server;

the low earth orbit satellite corresponding to the designated remote media storage server is configured to send the second continuing media content to the user equipment, so that the user equipment plays the streaming media content according to the second continuing media content after entering the electronic fence.

7. The system of claim 1,

the second content delivery service information includes: the identification information of the user equipment, the position information of the user equipment before exiting the electronic fence, the movement speed and the movement route before exiting the electronic fence, and the streaming media information of the streaming media content which is being played before exiting the electronic fence;

the ground network system includes: the system comprises a ground scheduling service engine and a ground streaming media storage server; the satellite network system includes: the system comprises a satellite streaming media scheduling service engine, a satellite streaming media transfer server, a remote media storage server and a plurality of low earth orbit satellites; wherein,

the satellite streaming media scheduling service engine is configured to calculate, according to the movement speed and the movement route before the user equipment exits the electronic fence, time when the user equipment exits the electronic fence and a corresponding third streaming media service time node, and send a fifth notification message to the ground scheduling service engine when the current time is longer than or equal to the second predetermined time length from the time when the user equipment exits the electronic fence, where the fifth notification message includes streaming media information of streaming media content being played before the user equipment exits the electronic fence and the third streaming media service time node;

the ground scheduling service engine is configured to query, in response to the fifth notification message, whether the streaming media content being played before the user equipment exits from the electronic fence is stored in the ground streaming media storage server, schedule the ground streaming media storage server to provide streaming media service for the user equipment if the streaming media content being played before the user equipment exits from the electronic fence is queried to be stored, and send a sixth notification message to the satellite streaming media scheduling service engine to notify the satellite streaming media scheduling service engine to schedule the satellite streaming media relay server and the first low-earth orbit satellite to provide streaming media service for the user equipment if the streaming media content being played before the user equipment exits from the electronic fence is queried to be not stored.

8. The system of claim 7,

the ground network system further includes: a transport network controller, an access network controller, and a plurality of network edge node servers;

the ground scheduling service engine, when configured to schedule the ground streaming media storage server to provide streaming media service for the user equipment, is specifically configured to:

notifying the transmission network controller, the access network controller and the related network element to reserve link and bandwidth resources for the user equipment, and notifying the ground streaming media storage server to push a third continuous media content to a network edge node server closest to the user equipment in the plurality of network edge node servers, wherein the third continuous media content is a media content after a third streaming media service time node in streaming media contents which are stored in the ground streaming media storage server and are being played before the user equipment exits the electronic fence;

and the network edge node server closest to the user equipment is used for providing streaming media service for the user equipment according to the reserved link and bandwidth resources and the third continuous media content.

9. The system of claim 7, further comprising:

the satellite streaming media scheduling service engine is configured to respond to the sixth notification message, determine, by scheduling the satellite streaming media relay server, a low-earth orbit satellite which is currently in communication with the user equipment and is closest to the user equipment, obtain a first low-earth orbit satellite, and send a seventh notification message to the first low-earth orbit satellite, where the seventh notification message includes the streaming media information and the third streaming media service time node before the user equipment exits the electronic fence;

the first low-earth orbit satellite is configured to respond to the seventh notification message, and send a fourth continuing media content to the ground streaming media storage server, where the fourth continuing media content is a media content after the third streaming media service time node in streaming media contents that are being played before the user equipment currently used in the first low-earth orbit satellite exits the electronic fence;

the ground streaming media storage server pushes the received fourth continuous media content to a network edge node server closest to the user equipment;

and the network edge node server closest to the user equipment is used for providing streaming media service for the user equipment according to the reserved link and bandwidth resources and the fourth continuous media content.

10. The system of claim 1,

the ground network system includes: the system comprises a ground scheduling service engine and a ground streaming media storage server; the satellite network system includes: the system comprises a satellite streaming media scheduling service engine, a satellite streaming media transfer server and a remote media storage server; wherein,

the satellite streaming media scheduling service engine is used for sending a media content query message to a remote media storage server;

the remote media storage server is used for responding to the media content query message and sending the existing media content information stored by the server to the satellite streaming media scheduling service engine;

the satellite streaming media scheduling service engine is further configured to send first relay control information to the ground scheduling service engine when it is determined that the load state of the satellite streaming media relay server is not overloaded, where the first relay control information includes identification information of the satellite streaming media relay server and the existing media content information;

the ground scheduling service engine is used for responding to the first transfer control information, generating plan pushing information according to the existing media content information, and sending the plan pushing information and the identification information of the satellite streaming media transfer server to a ground streaming media storage server, wherein the plan pushing information comprises hotspot information except the existing media content information in pre-generated media hotspot information;

the ground streaming media storage server is used for sending the media content corresponding to the plan pushing information to the satellite streaming media transfer server;

and the satellite streaming media transfer server is used for sending the media content related in the planned push information to a remote media storage server.

11. The system of claim 10, wherein the satellite network system further comprises a second low earth orbit satellite;

the satellite streaming media scheduling service engine is further configured to send second relay control information to the ground scheduling service engine when it is determined that the load state of the satellite streaming media relay server is overloaded, where the second relay control information includes identification information of a second low-earth orbit satellite and the existing media content information, and the second low-earth orbit satellite is a low-earth orbit satellite that is pre-designated for communicating with the remote media storage server;

the ground scheduling service engine is used for responding to the second transit control information, generating the plan pushing information according to the existing media content information, and sending the plan pushing information and the identification information of the second low-earth orbit satellite to a ground streaming media storage server;

the ground streaming media storage server is used for sending the media content corresponding to the plan pushing information to the second low-earth orbit satellite;

the second low-earth orbit satellite is used for sending the media content involved in the planned push information to a remote media storage server.

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