CN113709580A - Content delivery network system - Google Patents

Content delivery network system Download PDF

Info

Publication number
CN113709580A
CN113709580A CN202110987576.1A CN202110987576A CN113709580A CN 113709580 A CN113709580 A CN 113709580A CN 202110987576 A CN202110987576 A CN 202110987576A CN 113709580 A CN113709580 A CN 113709580A
Authority
CN
China
Prior art keywords
streaming media
satellite
user equipment
ground
service
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110987576.1A
Other languages
Chinese (zh)
Other versions
CN113709580B (en
Inventor
陶蒙华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China United Network Communications Group Co Ltd
Original Assignee
China United Network Communications Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China United Network Communications Group Co Ltd filed Critical China United Network Communications Group Co Ltd
Priority to CN202110987576.1A priority Critical patent/CN113709580B/en
Publication of CN113709580A publication Critical patent/CN113709580A/en
Application granted granted Critical
Publication of CN113709580B publication Critical patent/CN113709580B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6193—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via a satellite
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
    • G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
    • G06F16/29—Geographical information databases
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/55—Push-based network services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/60—Scheduling or organising the servicing of application requests, e.g. requests for application data transmissions using the analysis and optimisation of the required network resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25808—Management of client data
    • H04N21/25841—Management of client data involving the geographical location of the client
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6156—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network
    • H04N21/6175—Network physical structure; Signal processing specially adapted to the upstream path of the transmission network involving transmission via Internet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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 communications technologies, and in particular, to a content delivery network system.
Background
When providing streaming media services on a Network, a Content Delivery/Distribution Network (CDN) may be generally used to implement the streaming media services. The content delivery/distribution network can add a new network architecture in the Internet, and distribute the content of the website to the network edge (host, network application, etc.) nearest to the user, so that the user can obtain the required content nearby, the Internet network congestion condition is solved, and the response speed of the user for accessing the website is improved.
However, the existing content delivery network can only provide the distribution capability based on the land network system, and the distribution service of the streaming media is limited in the areas (rivers, lakes, seas, remote areas, mountainous areas, etc.) which are not covered by the land network.
Disclosure of Invention
Therefore, the present invention provides a content delivery network system to solve the problem of limited streaming media distribution service in the prior art due to the fact that the streaming media is not covered by a land network.
In order to achieve the above object, a first aspect of the present invention provides a content delivery network system, including a ground network system and a satellite network system, where the ground network system is configured to provide a streaming media service for a user equipment through a ground network within a preset ground network coverage range, and send acquired first content delivery service information of the user equipment to the satellite network in a case that it is determined that the user equipment enters an electronic fence after a first predetermined time period, where the electronic fence includes an area outside the ground network coverage range; 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 received first content delivery service information, and sending the acquired 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.
The invention has the following advantages: according to the content delivery network system in the embodiment of the invention, the continuity and the integrity of the user streaming media service can be ensured in the region which is not covered by the land network.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a content delivery network system according to 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 view of a scenario of a content delivery network system according to an embodiment of the present invention;
fig. 4 shows a flowchart of handover between the terrestrial network system and the satellite network system according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation. 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 merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the embodiment of the invention, the CDN can technically solve the problems of small network bandwidth, large user access amount, uneven distribution of network points and the like, and the problem of low response speed of the user for accessing the website. CDN can be understood as a network construction that can deliver broadband rich media over traditional IP networks with a particularly optimized network overlay. The key technology of CDN includes, for example, the following aspects: content distribution, which can distribute content to the edge server closest to the user; the content routing request can adopt a load balancing technology of the CDN, and balances the request of the user among a plurality of edge servers through a redirection mechanism in the content router so that the user request obtains the response of the nearest content source; load balancing, which can balance load flow on the edge server according to the availability of the content, the availability of the server and the user condition; and, content storage management.
In some embodiments, the CDN may be built based on a land wired internet or an IP private network of an operator, that is, based on a wired core network and a transmission network of the operator, a wired access manner such as an optical fiber may be used during access, and a Wireless access manner may also be used, for example, a Wireless Fidelity (Wi-Fi) and other Wireless access manners may be used in a base station and a home of the operator. The content delivery network system is mostly a land-based communication system, and the user is also a fixed or mobile terminal device on land.
In some embodiments, satellite communications may provide indiscriminate communication services to global users using high, medium, and low orbit satellites for wide area, and even global, coverage, as compared to terrestrial mobile communications networks. Commercial mobile satellite communication systems such as Iridium (Iridium), maritime satellite (Inmarsat), Thuraya (Thuraya) and the like provide effective solutions for applications such as maritime, emergency and personal mobile communication; the satellite communication service and the internet service are fused by medium and low orbit satellite constellations such as a Teledesic satellite, a micro-nano satellite (such as OneWeb) and a space broadband network satellite Starlink of the communication satellite, and new vitality is injected into the satellite communication industry. For example, the satellite-ground link of Teledesic is Ka wave band, 60GHz interstellar link is established between adjacent satellites on each orbital plane, Teledesic adopts all-satellite processing and all-satellite switching, and the system is designed as an 'air Internet'.
In some embodiments, terrestrial fifth Generation Mobile Networks (5G) may have a more sophisticated industrial chain, a large user population, a flexible and efficient application service model, and the like. The satellite communication system and the 5G are mutually fused, make up for deficiencies, and jointly form a global seamless-coverage integrated communication network integrating sea, land, air and sky, so that the requirements of various ubiquitous services of users can be met, and the satellite communication system is an important direction for future communication development.
The existing streaming media service based on satellite can only provide broadcast streaming media service generally, and can not provide point-to-point personalized service; in addition, in the existing broadcast streaming media service, the device receiving the service is generally fixed, and a fixed single satellite provides the service, so that the same media program content cannot be continuously provided with the service through a plurality of satellites.
In the embodiment of the invention, the integration of the satellite and the 5G technology can give full play to respective advantages, and provide more comprehensive and high-quality service for users, such as the following main aspects: in remote areas, airplanes or ocean vessels which cannot be covered by the ground 5G network, the satellite can provide economic and reliable network service, and the network is extended to places which cannot be reached by the ground network; the satellite can provide continuous and uninterrupted network connection for Internet of things equipment and mobile carrier users such as airplanes, steamships, trains, automobiles and the like, and after the satellite is fused with the 5G, the service capability of the 5G system in the aspect can be greatly enhanced; the superior broadcast/multicast capabilities of satellites can provide efficient data distribution services to network edges and user equipment.
For a better understanding of the present invention, a content delivery network system according to embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be noted that these embodiments are not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic structural diagram showing 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 ground network system 100 is configured to provide streaming media services for a user equipment through a ground network within a preset ground network coverage range, and send acquired first content delivery service information of the user equipment to a satellite network under the condition that it is determined that the user equipment enters an electronic fence after a first predetermined time period, where the electronic fence includes an area outside the ground network coverage range.
The satellite network system 200 is configured to provide streaming media services to the user equipment entering the electronic fence through the 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 100 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 100 is further configured to provide streaming media services to the user equipment exiting the electronic fence through the ground network according to the received second content delivery service information.
In some embodiments, the electronic fence can be understood as a network coverage area indicated by an electronic map. In embodiments of the present invention, the electronic fence can be used to represent an area outside of ground network coverage. For example, a network operator can determine which places have network coverage and which places do not have network coverage according to own network planning and base station setting, and draw an electronic map for the determination, and in the drawn electronic map, the places without network coverage are enclosed by curves, so that an electronic fence map is formed; according to the pre-drawn electronic fence, as the area outside the fence is covered by the ground network, the broadband streaming media service can be provided for the user equipment outside the fence; the area in the fence represents the area where the ground network system cannot provide the real-time streaming media service, and the streaming media service can be provided through the satellite network.
In some embodiments, the electronic fence information may be sent to dispatch service engines in advance, such as the terrestrial dispatch service engine 102 and the satellite streaming dispatch service engine 201; the electronic fence information can also be sent to a target device which needs to provide continuous and uninterrupted streaming media service, such as a user device located in a driving automobile. The ground scheduling service engine 102, the satellite streaming media scheduling service engine 201 and the user equipment store electronic fence information for the ground network system and the satellite network system which provide services according to electronic fence switching.
The content delivery network system comprises a ground content delivery network and a satellite content delivery network, and switching of the user equipment between the ground content delivery network and the satellite content delivery network is determined in an electronic fence mode, so that continuity and integrity of user streaming media services are guaranteed.
Because the content delivery network system of the embodiment of the invention can not only provide streaming media service for a place with network coverage, but also continue to provide streaming media service through the satellite network when the mobile user equipment enters a place without network coverage, the architecture of the content delivery network system can be understood as a space-ground integrated seamless connection streaming media service system architecture, therefore, the content delivery network of the embodiment of the invention can be called as a space-ground integrated content delivery network, and the content delivery network is switched between a ground network system and a satellite network system, so that the continuity and integrity of streaming media service for the user equipment are ensured, and the real-time media delivery network service with full geographic orientation coverage and seamless connection is realized.
Fig. 2 is a schematic block diagram of a content delivery network system according to another embodiment of the present invention, and the same or equivalent components of fig. 2 to those of fig. 1 use the same reference numerals. A content delivery network system according to another embodiment of the present invention is described in detail below with reference to fig. 2.
As shown in fig. 2, the ground network system 100 may include: a ground wireless network base station 101, a ground scheduling service engine 102, a ground streaming media storage server 103, a transmission network controller 104, an access network controller 105 and related network elements, a network edge node server 106 and a ground satellite base station 111.
The satellite network system 200 includes: the system comprises a satellite streaming media scheduling service engine 201, a satellite streaming media transit server 202, a remote media storage server 203 and a plurality of LEO satellites 204.
In some embodiments, since the geostationary satellite is 3 tens of thousands of kilometers from the ground, the radio signal is transmitted over such a long distance and is severely attenuated; in addition, only a large receiving antenna on the ground can receive the weak signal, obviously, the mobile phone of a vehicle moving on the ground and a mobile phone of a walking person can not realize the large receiving antenna, so that the embodiment of the invention carries out continuous service through an LEO satellite instead of directly and uninterruptedly providing service by adopting a static satellite on a high orbit, can realize bidirectional interaction of media service, avoids the condition that the traditional satellite network can only provide unidirectional streaming media service, and accords with the technical development trend of a future day-ground integrated streaming media service network.
The present invention is not limited to the specific modules described above and shown in fig. 2, and in some embodiments, the terrestrial network system 100 and the satellite network system 200 may only include some of the modules, i.e., the terrestrial network system 100 and the satellite network system 200 may include a more flexible configuration of modules, which is described below in connection with specific embodiments.
In some embodiments, the first content delivery service information comprises: the method comprises the steps of identifying information of a user device, position information of the user device before entering the electronic fence, movement speed and movement route before entering the electronic fence, and streaming media information of streaming media content which is playing before entering the electronic fence.
The ground network system 100 may include: a ground wireless network base station 101, a ground scheduling service engine 102, a transmission network controller 104 and a ground satellite base station 111; the satellite network system 200 includes: the system comprises a satellite streaming media scheduling service engine 201, a satellite streaming media transit server 202, a remote media storage server 203 and a plurality of low earth orbit satellites 204.
The ground wireless network base station 101 is configured to provide a streaming media service for a user equipment within a network coverage of the base station.
The ground scheduling service engine 102 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 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 the user equipment enters the electronic fence to the transmission network controller 104 when the current time is greater than or equal to a first predetermined time length from the time node when the user equipment enters the electronic fence.
And the transmission network controller 104 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 201 through the terrestrial satellite base station 111.
The satellite streaming media scheduling service engine 201 is configured to query whether a remote media storage server 203 stores streaming media content that is being played before a user equipment enters an electronic fence, provide streaming media service for the user equipment through a scheduling satellite streaming media relay server 202 and a low earth orbit satellite 204 if the remote media storage server 203 does not store the streaming media content that is being played before the user equipment enters the electronic fence, and provide streaming media service for the user equipment through the scheduling remote media storage server 203 if the remote media storage server queries that the remote media storage server 203 stores the streaming media content that is being played before the user equipment enters the electronic fence.
In this embodiment, the ground scheduling service engine may send, to the satellite streaming media scheduling service engine, the identification information, the location information, and the time when the streaming media information of the user equipment enters the electronic fence before the user equipment enters the electronic fence; the satellite streaming media scheduling service engine inquires whether streaming media content which is played before the user equipment enters the electronic fence is stored in the remote media storage server or not, and provides corresponding streaming media service according to the inquiry result, so that after the user equipment leaves the network coverage range of the ground network system, the satellite streaming media scheduling service engine continuously provides streaming media service for the user equipment through the satellite network system.
With continued reference to fig. 2, in some embodiments, the satellite streaming media scheduling service engine 201 is configured to send a first notification message to the satellite streaming media relay server 202 in case that the streaming media content being played by the user equipment is not stored on the remote media storage server 203.
The satellite streaming media relay server 202 is configured to calculate a low-earth orbit satellite 204 closest to the user equipment from the plurality of low-earth orbit satellites 204 in response to the first notification message.
And the low-earth orbit satellite 204 closest to the satellite is configured to perform device identity authentication according to the acquired identification information of the user device, and send a second notification message to the satellite streaming media scheduling service engine 201 in the case that the device identity authentication is successful, so as to notify the satellite streaming media scheduling service engine 201 that the satellite itself provides a streaming media service connection service for the user device.
The satellite streaming media scheduling service engine 201 is further configured to send a corresponding third notification message to the ground scheduling service engine 102 according to the service type of the streaming media service, where the third notification message includes the service type and the identification information of the low-earth orbit satellite 204 closest to the service type.
And the ground scheduling service engine 102 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 continuous media content, and 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.
The low earth orbit satellite 204 closest to the user equipment is further configured 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 electronic fence.
In this embodiment, a plurality of low-earth orbit satellites may be used to provide streaming media services for user equipment in a ground network system, and geosynchronous satellites (e.g., high orbit satellites) or geostationary orbit satellites are used to implement and implement the functions of the satellite streaming media scheduling service engine and the satellite streaming media relay server in this embodiment of the present invention.
And under the condition that the streaming media content played by the user equipment is not stored on the remote media storage server, providing continuous service of the streaming media service for the user equipment through the low earth orbit satellite closest to the user equipment.
With continued reference to fig. 2, in some embodiments, the ground network system 100 further comprises: the ground streaming media storage server 103.
If the service type is on-demand service, the terrestrial dispatch service engine 102, when configured to send the first connection media content to the low earth orbit satellite 204 closest to the user equipment in a manner corresponding to the service type, is specifically configured to: sending the first connecting media content to the satellite streaming media transit server 202 by scheduling the ground streaming media storage server 103; the satellite streaming media relay server 202 sends the received first relay media content to the nearest low earth orbit satellite 204.
If the service type is a live broadcast service, the ground scheduling service engine 102, when configured to send the first connection media content to the low earth orbit satellite 204 closest to the user equipment in a manner corresponding to the service type, is specifically configured to: the first contiguous media content is sent to the nearest low earth orbit satellite 204 by the dispatch terrestrial streaming media storage server 103.
In this embodiment, the terrestrial dispatch service engine may send the first continuous media content to the low earth orbit satellite closest to 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 types, the first continuous media content is directly sent to the low earth orbit satellite closest to the service types so as to ensure the continuity of using the streaming media by the user and uninterruptedly finish the on-demand and live broadcast services of the user.
In some embodiments, the low earth orbit satellite 204 closest to the user equipment is specifically configured to, when being used for performing equipment authentication according to the acquired identification information of the user equipment: according to the client information allowing to provide the continuous service from the satellite streaming media scheduling service engine 201, if the client information allowing to provide the continuous service includes the identification information of the user equipment, it is determined that the equipment identity authentication of the user equipment is successful.
In this embodiment, when it is determined that the authentication of the user equipment is successful, the connection service is provided for the user equipment, and the data security and the legitimate rights and interests of the streaming media connection service user in the service process are ensured.
In some embodiments, the satellite network system 200 also includes a plurality of remote media storage servers 203.
The satellite streaming media scheduling service engine 201 is configured to use the queried remote media storage server 203, which stores streaming media content that the user equipment is playing before entering the electronic fence, as the specified remote media storage server 203, 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 specified remote media storage server 203, where the fourth notification message includes the second streaming media service time node.
And the designated remote media storage server 203 is used for taking the media content after the second streaming media service time node in the currently played streaming media content stored by the designated remote media storage server 203 as the second continuous media content and sending the second continuous media content to the low earth orbit satellite 204 corresponding to the designated remote media storage server 203.
The low earth orbit satellite 204 corresponding to the designated remote media storage server 203 is configured to send the second continuous media content to the user equipment, so that the user equipment plays the streaming media content according to the second continuous media content after entering the electronic fence.
In the embodiment of the invention, different from the current unidirectional 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, so that the areas can be edge nodes and are provided with storage servers, and the remote media storage server provided by the embodiment of the invention is obtained.
In this embodiment, when the satellite streaming media scheduling service engine queries the streaming media content being played by the user equipment stored in the remote media storage server, the streaming media content stored in the remote media storage server provides a media continuation service for the user equipment entering the electronic fence.
In some embodiments, the second content delivery service information comprises: the method comprises the steps of identifying information of the user equipment, position information before the user equipment exits the electronic fence, movement speed and movement route before the user equipment exits the electronic fence, and streaming media information of streaming media content playing before the user equipment exits the electronic fence.
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: the system comprises a satellite streaming media scheduling service engine 201, a satellite streaming media transit server 202, a remote media storage server 203 and a plurality of low earth orbit satellites 204.
The satellite streaming media scheduling service engine 201 is configured to calculate, according to a movement speed and a movement route before the user equipment exits the electronic fence, a 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 102 when the current time is greater than or equal to a 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 102 is configured to query, in response to the fifth notification message, 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, schedule the ground streaming media storage server 103 to provide streaming media service for the user equipment if the streaming media content being played before the user equipment exits the electronic fence is queried to be stored, and send a sixth notification message to the satellite streaming media scheduling service engine 201 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 service for the user equipment if the streaming media content being played before the user equipment exits the electronic fence is queried to be not stored.
In this embodiment, the ground scheduling service engine may provide streaming service for the user equipment by the ground streaming media storage server when the streaming media storage server stores the streaming media content being played according to the streaming media information and the streaming media service time node of the streaming media content being played before the user equipment exits the electronic fence; if the streaming media content being played is not stored in the ground streaming media storage server, the streaming media service is provided by the low-earth orbit satellite without the user equipment, so that the continuity of using the streaming media by the user is ensured.
In some embodiments, the ground network system 100 further comprises: a transport network controller 104, an access network controller 105 and associated network elements, a plurality of network edge node servers 106.
The ground scheduling service engine 102, when configured to schedule the ground streaming media storage server 103 to provide streaming media service for the user equipment, is specifically configured to: informing the transport network controller 104, the access network controller 105 and related network elements to reserve link and bandwidth resources for the user equipment, and informing the ground streaming media storage server 103 to push a third continuous media content to a network edge node server 106 closest to the user equipment in the plurality of network edge node servers 106, where the third continuous media content is a media content after a third streaming media service time node in streaming media contents being played before the user equipment stored in the ground streaming media storage server 103 exits the electronic fence; and the network edge node server closest to the user equipment is used for providing the streaming media service for the user equipment according to the reserved link and bandwidth resources and the third continuous media content.
In this embodiment, when the ground scheduling service engine schedules the ground streaming media storage server to provide the streaming media service for the user equipment, it needs to reserve link and bandwidth resources for the user equipment, and notify the ground streaming media storage server to push the continuous media content to the network edge node server closest to the user equipment, so as to ensure the continuity of using the streaming media by the user.
In some embodiments, the satellite streaming media scheduling service engine 201 is configured to determine, by the scheduling satellite streaming media relay server 202, a low-earth orbit satellite 204 closest to the user equipment currently in communication with the user equipment as the first low-earth orbit satellite 204 in response to a sixth notification message, and send a seventh notification message to the first low-earth orbit satellite 204, where the seventh notification message includes streaming media information before the user equipment exits the electronic fence and a third streaming media service time node.
And the first low-earth orbit satellite 204 is configured to respond to the seventh notification message, and send a fourth continuing media content to the ground streaming media storage server 103, where the fourth continuing media content is a media content after the third streaming media service time node in the streaming media content that is being played before the user equipment currently used in the first low-earth orbit satellite 204 exits the electronic fence.
The ground streaming media storage server 103 pushes the received fourth continuous media content to the 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 push.
In this embodiment, the satellite streaming media relay server 202 determines, under the scheduling of the satellite streaming media scheduling service engine 102, a low-earth orbit satellite currently communicating with the user equipment and closest to the user equipment, so as to provide streaming media service for the user equipment through the low-earth orbit satellite after the user equipment exits the electronic fence, so as to ensure continuity of using streaming media by the user.
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 transit server 202, and a remote media storage server 203.
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 the self server to the satellite streaming media scheduling service engine 201 in response to the media content query message.
The satellite streaming media scheduling service engine 201 is further configured to send first relay control information to the ground scheduling service engine 102 when it is determined that the load state of the satellite streaming media relay server 202 is not overloaded, where the first relay control information includes identification information of the satellite streaming media relay server 202 and existing media content information.
And the ground scheduling service engine 102 is configured to generate, in response to the first relay control information, schedule push information according to the existing media content information, and send the schedule push information and the identification information of the satellite streaming media relay server 202 to the ground streaming media storage server 103, where the schedule push information includes hotspot information, except the existing media content information, in the pre-generated media hotspot information.
And the ground streaming media storage server 103 is configured to send the media content corresponding to the schedule push information to the satellite streaming media relay server 202.
And the satellite streaming media transit server 202 is used for sending the media content related in the scheduled 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, a place with certain conditions may be selected, and a remote media storage server may be provided, for example, with a power supply, and may be maintained periodically and geographically well. The remote media storage server can be connected with the satellite antenna transmitter, and hot content in other places (including the cable network) is stored locally according to the scheduling of the satellite streaming media scheduling service engine. The saved media content may include, for example: when other nodes in remote areas have requirements, the requirements can be met through a satellite, namely, the remote media storage servers can receive and store the media contents and provide services for users in other areas. Therefore, the remote media storage server may be a network node in the CDN system, and may store only the hot content, not all the content, and only the terrestrial streaming media storage server stores all the content. The satellite streaming media dispatch service engine may act as a dispatch service engine throughout the remote area.
In some embodiments, the streaming media service system of the present application adopts a cloud storage manner, and since distributed processing and parallel computing are adopted, requests of streaming services can be centrally controlled by 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 scheduling service engine 201 is further configured to send second relay control information to the ground scheduling service engine 102 when it is determined that the load status of the satellite streaming media relay server 202 is overload, where the second relay control information includes identification information of a second low-earth orbit satellite 204 and existing media content information, and the second low-earth orbit satellite 204 is a low-earth orbit satellite 204 that is pre-designated for communicating with the remote media storage server 203.
And the ground scheduling service engine 102 is configured to generate, in response to the second transit control information, scheduled push information according to the existing media content information, and send the scheduled push information and the identification information of the second low-earth orbit satellite 204 to the ground streaming media storage server 103.
And the terrestrial streaming media storage server 103 is configured to send the media content corresponding to the scheduled push information to the second low-earth orbit satellite 204.
A second low earth orbit satellite 204 for transmitting the media content involved in the scheduled push information to the remote media storage server 203.
In this embodiment, according to the arrangement and control of the satellite streaming scheduling service engine, when the satellite streaming relay server is overloaded, the terrestrial streaming storage server can directly transmit the media content to the low-earth orbit satellite, which relays the media content involved in the scheduled push information.
The content delivery network system provided by the embodiment of the invention can be based on a low earth orbit communication satellite and an existing CDN on the ground, and provides a space-ground integrated content delivery network aiming at the problem that the existing CDN cannot meet the real-time streaming media service requirements of users in sky, ocean, remote areas, mountain areas and the like.
FIG. 3 shows a scenario diagram of a content delivery network system of an embodiment of the invention; FIG. 4 is a flow chart illustrating a handoff between a terrestrial network system and a satellite network system according to an embodiment of the present invention; the same reference numerals are used for the same or equivalent components in fig. 3 as in fig. 1 and 2. The following describes the content delivery network system and the overall working process of the content delivery network system according to the embodiment of the present invention based on the heaven-earth integrated content delivery network system according to the embodiment of the present invention, with reference to fig. 3 and 4.
In fig. 3, the mobile architecture may further include: an operation support system server 107, an Optical Line Terminal (OLT) 108, a core network switch 109, user equipment 110, and a terrestrial satellite base station 111. Illustratively, LEO satellite 204 may include, for example, LEO satellite 204-1, LEO satellite 204-2, LEO satellite 204-3, … …, LEO satellite 204-n, n being an integer greater than or equal to 1.
The ground network system 100 in the architecture may be controlled by an SDN architecture, the metro transport network controller 104 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 of authentication, charging and the like on the user identity; the access network controller 105 is connected to the ground scheduling service engine 102, and the ground scheduling service engine 102 further includes an Electronic Program Guide (EPG) server, where the EPG may be the initial interface content presented to the user by an Internet Protocol Television (IPTV) service.
In fig. 3, the OLT108 may provide a network-side interface of an optical access network and terminal equipment connecting a fiber trunk, e.g., a terrestrial access user equipment 110 and a user equipment 110 outside an electronic fence and located on a driving car, and the core network switch 109 is a switch of the backbone portion of the terrestrial network system.
The ground satellite base station 111 may provide a data transmission channel between the ground network system 100 and the satellite network system 200.
It should be understood that the types of devices and the number of devices included in the architecture of fig. 3 are merely illustrative and can be flexibly adjusted according to the actual application requirements.
In the embodiment of the present invention, the ground network system 100, i.e., the ground communication system (i.e., the ground network), may implement unified control and management, and a centralized dynamic management and control mechanism, on multiple heterogeneous access networks through interfaces and protocols defined by the SDN. Compared with the traditional manual network management system, the SDN-based ground network system is more flexible, can realize wired and wireless integrated access, and meets the requirement of network convergence. The access network controller 105 and the related network elements may implement control management of each user access network, determine a path and a bandwidth of an access layer for each streaming media service, propose a link and a bandwidth reservation resource for the metro transmission network according to a request of the user, and determine a transmission path for the metro transmission network.
In fig. 3, when the driving vehicle is outside the pre-drawn electronic fence, that is, the user equipment 110 on the driving vehicle is within the coverage of the ground network, the receiving and serving of the streaming media content can be completed through the ground wireless network base station 101. When the driving vehicle moves into a pre-drawn electronic fence, i.e. a place where the user equipment 110 on the driving vehicle is not covered by the ground network, the service needs to be provided through the satellite network.
Therefore, the ground dispatcher service engine 102 needs to have a prior electronic fence (map), which is a part of the area where the ground network cannot provide the real-time streaming media service, and sends the electronic fence to the ground dispatcher service engine 102 for storage and also to the object needing the service integrated with the sky and the ground, such as the user equipment 110 in the driving car. At present, LEO satellites develop rapidly, a system can provide broadband services with the capacity of 1Gbps per user, the delay can be controlled between 25ms and 35ms, and the bandwidth requirement of user media on demand can be met.
Referring to fig. 4, the network handover procedure in the embodiment of the present invention may include the following steps.
S401, providing streaming media service for user equipment through a ground fixed mobile network within a preset ground network coverage range.
The terrestrial fixed mobile network illustratively includes a fixed telephone network (fixed network) and a mobile internet network (mobile network). The driving automobile can be an automobile driving on a highway, and the user equipment 110 on the automobile is currently in the coverage range of the ground fixed mobile network, so that the user equipment 110 on the automobile can interact with the ground wireless network base station 101, such as a 5G network base station, and acquire a media content service.
S402, the ground network system judges whether the user equipment enters the electronic fence after a first preset time, if so, S403 is executed, and if not, S401 is continuously executed.
For example, during the driving of the automobile, the user device 110 in the automobile may continuously upload the current location information to the ground scheduling service engine 102, and since the user device 110 is located in the driving automobile, the current location of the user device 110 is the current driving location of the automobile where the user device 110 is located. In this embodiment, the ground scheduling service engine 102 compares the current driving position of the vehicle with the electronic fence map, and can determine the time required for the user equipment 110 located in the vehicle to enter the electronic fence according to the movement route and speed of the vehicle, so as to determine whether the user equipment enters the electronic fence after a first predetermined time period.
S403, the satellite network system provides streaming media service for the user equipment entering the electronic fence through the satellite network.
Illustratively, at a certain time before the car enters the fence, for example, at the first 3 minutes before the car enters the fence, the terrestrial scheduling service engine 102 sends the identification information of the user equipment 110, the location information of the car, the name and number of the program being on demand, and the like to the transmission network controller 104, and sends these information to the satellite streaming media scheduling service engine 201 through the terrestrial satellite base station 111, and the satellite streaming media scheduling service engine 201 queries the remote media storage server 203 whether the streaming media content required by the user equipment 110 in the car is available.
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 scheduling service engine 201 notifies the ground scheduling service engine 102, so that the ground scheduling service engine 102 sends the streaming media content required by the user equipment 110 on the automobile to the satellite streaming media relay server 202 in advance through the ground satellite base station 111, and can store the media content in advance for a specified time length before the user equipment 110 enters the fence, where the specified time length may be greater than or equal to zero and less than or equal to a first predetermined time length (after the first predetermined time length, the user equipment enters the electronic fence); the satellite streaming media scheduling service engine 201 controls the satellite streaming media relay server 202 to calculate the LEO satellite 204 closest to the user equipment 110, establishes a contact with the user equipment 110 on the ground vehicle according to the LEO satellite 204 closest to the user equipment 110, and acquires information such as the position of the ground vehicle where the user equipment 110 is located and the equipment ID, in addition, the LEO satellite 204 interacts with the satellite streaming media scheduling service engine 201 to acquire ground client information which is stored in the satellite streaming media scheduling service engine 201 and needs to provide the continuous service, and compares the ground client information with the ground client information indicated by the equipment ID received by the satellite streaming media scheduling service engine 201 to perform equipment identity verification on the user equipment 110, and if the equipment identity is verified, the satellite streaming media relay server is determined to provide the continuous service for the user equipment 110.
For example, the user device 110 traveling in a car at the edge of the electronic fence establishes a session with the LEO satellite 204-3, the LEO satellite 204-3 can obtain the time node of the user device 110 entering the electronic fence through the received time node of the user device 110 sent by the terrestrial scheduling service engine, or the LEO satellite 204-3 can obtain the time node of the user device 110 entering the electronic fence through the movement speed and the movement route uploaded by the user device 110 in the car, so that the LEO satellite 204-3 can send the device ID of the user device 110 to the satellite streaming scheduling service engine 201 to inform the satellite streaming service engine 201 to provide a connection service for the user device (the device ID of the user device 110) indicated by the specific ID in case that the car where the user device 110 is determined to be about to enter the electronic fence (after a first predetermined time), the satellite streaming media scheduling service engine 201 notifies the satellite streaming media relay server 202, the streaming media content to be continued is sent to the LEO satellite 204-3 through the satellite streaming media relay server 202, the LEO satellite 204-3 forwards the received streaming media content to the user equipment 110 indicated by the specific ID on the ground, so as to cache the streaming media content on the user equipment 110, and the user equipment 110 with the specific ID compares the playing progress of the received streaming media content with the streaming media content currently in use, so as to ensure the continuity and integrity of content playing. In the embodiment of the present invention, the user equipment 110 or the vehicle in which the user equipment 110 is located can receive information transmitted by the terrestrial radio base station and information transmitted by the satellite receiving antenna, and can switch between communication with the terrestrial radio base station and communication with the satellite receiving antenna.
In the second case of the query result, if there is a media content to be played by the user equipment 110 on the remote media storage server 203, the satellite streaming media scheduling service engine 201 notifies the remote media storage server 203 on the ground to transmit the relevant media content to a specified satellite, such as LEO 2, and then the LEO 2 transmits the subsequent media content to the user equipment 110 on the ground mobile vehicle, so as to complete the continuity and integrity of the streaming media content service played by the user equipment 110 on the ground mobile vehicle.
S404, the satellite network system judges whether the user equipment leaves the electronic fence after a second preset time, if so, S401 is executed, and if not, S403 is continuously executed.
The second predetermined time period and the first predetermined time period may be the same or different. The method and the device can be set according to actual conditions, and the embodiment of the invention is not particularly limited.
Through the steps S301 to S304, a space-ground integrated and seamless streaming media service system architecture can be provided for the user equipment on the ground through the switching between the ground network system and the satellite network system, so that not only can streaming media service be provided for places with network coverage, but also streaming media service can be continuously provided for the user equipment through the satellite network when the mobile object/user equipment enters places without network coverage.
According to the heaven-earth integrated content delivery network disclosed by the embodiment of the disclosure, the streaming media service requirements in remote areas, airplanes or ocean vessels which cannot be covered by a ground 5G network can be met, and continuous and uninterrupted network connection and streaming media service can be provided for Internet of things equipment and mobile carrier users such as ships, trains and automobiles, so that the switching of user equipment between the ground CDN network and the sky CDN network is determined by the ground content delivery network and the satellite content delivery network in an electronic fence manner, the continuity and integrity of the streaming media service of the user are ensured, and the seamless media delivery network service covered in a full geographic orientation is realized.
It is to be understood that the invention is not limited to the particular arrangements and instrumentality described in the above embodiments and shown in the drawings. For convenience and brevity of description, detailed description of a known method is omitted here, and for the specific working processes of the system, the module and the unit described above, reference may be made to corresponding processes in the foregoing method embodiments, which are not described herein again.
According to an embodiment of the invention, the process described above with reference to the flow chart may be implemented as a computer software program. For example, embodiments of the 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 method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network, and/or installed from a removable storage medium.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product comprises one or more computer instructions which, when run on a computer, cause the computer to perform the methods described in the various embodiments above. The procedures or functions according to the embodiments of the invention are brought about in whole or in part when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid state disk), among others.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the 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 when it is determined that the user equipment exits the electronic fence after a second predetermined time period;
the ground network system is further configured to provide streaming media services for the user equipment exiting the electronic fence through a ground network according to the received second content delivery service information.
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; 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 content of the first and second substances,
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 streaming media content being played before the user equipment enters the electronic fence is stored in the remote media storage server, provide streaming media service for the user equipment by scheduling the satellite streaming media relay server and the low earth orbit satellite if the streaming media content being played before the user equipment enters the electronic fence is not stored in the remote media storage server, and provide streaming media service for the user equipment by scheduling the remote media storage server if the streaming media content being played before the user equipment enters the electronic fence is stored in the remote media storage server.
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 which is 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 used for carrying out equipment identity authentication according to the acquired identification information of the user equipment, and sending a second notification message to the satellite streaming media scheduling service engine under the condition that the equipment identity authentication is successful so as to notify the satellite streaming media scheduling service engine that the satellite streaming media scheduling service engine provides the streaming media service continuing service for the user equipment by the self orbit satellite;
the satellite streaming media scheduling service engine is further configured to send a corresponding third notification message to a ground scheduling service engine according to the service type of the streaming media service, where the third notification message includes the service type and the identification information of the low-earth orbit satellite closest to the service type;
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.
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 a low-earth orbit satellite closest to the user equipment in a manner corresponding to the service type, is specifically configured to: sending the first continuous media content 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 a 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 to provide the continuous service contains the identification information of the user equipment, determining that the equipment identity authentication of the user equipment is successful according to the customer information allowing to provide 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 content of the first and second substances,
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 respond to the fifth notification message, 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, 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 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 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 content of the first and second substances,
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 to the plan 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.
CN202110987576.1A 2021-08-26 2021-08-26 Content delivery network system Active CN113709580B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110987576.1A CN113709580B (en) 2021-08-26 2021-08-26 Content delivery network system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110987576.1A CN113709580B (en) 2021-08-26 2021-08-26 Content delivery network system

Publications (2)

Publication Number Publication Date
CN113709580A true CN113709580A (en) 2021-11-26
CN113709580B CN113709580B (en) 2023-04-07

Family

ID=78655132

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110987576.1A Active CN113709580B (en) 2021-08-26 2021-08-26 Content delivery network system

Country Status (1)

Country Link
CN (1) CN113709580B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020040366A1 (en) * 2000-01-28 2002-04-04 Lahr Nils B. System and method for rewriting a media resource request and/or response between origin server and client
US20150200440A1 (en) * 2014-01-15 2015-07-16 Alki Andrew David Individualized satellite transmission systems and remote viewing systems
CN108683450A (en) * 2018-05-15 2018-10-19 国网上海市电力公司 A kind of Synergistic method holding disconnected satellite network and power private network late based on appearance
CN111108776A (en) * 2017-07-21 2020-05-05 弗劳恩霍夫应用研究促进协会 Wireless communication system and method for handling enhanced handover of wireless communication
CN112312507A (en) * 2020-10-12 2021-02-02 广东电网有限责任公司广州供电局 Power grid communication network switching method and device and power grid communication system
CN112713924A (en) * 2021-03-23 2021-04-27 南通先进通信技术研究院有限公司 Working method of CDN network system based on satellite communication

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020040366A1 (en) * 2000-01-28 2002-04-04 Lahr Nils B. System and method for rewriting a media resource request and/or response between origin server and client
US20150200440A1 (en) * 2014-01-15 2015-07-16 Alki Andrew David Individualized satellite transmission systems and remote viewing systems
CN111108776A (en) * 2017-07-21 2020-05-05 弗劳恩霍夫应用研究促进协会 Wireless communication system and method for handling enhanced handover of wireless communication
CN108683450A (en) * 2018-05-15 2018-10-19 国网上海市电力公司 A kind of Synergistic method holding disconnected satellite network and power private network late based on appearance
CN112312507A (en) * 2020-10-12 2021-02-02 广东电网有限责任公司广州供电局 Power grid communication network switching method and device and power grid communication system
CN112713924A (en) * 2021-03-23 2021-04-27 南通先进通信技术研究院有限公司 Working method of CDN network system based on satellite communication

Also Published As

Publication number Publication date
CN113709580B (en) 2023-04-07

Similar Documents

Publication Publication Date Title
US11758509B2 (en) Wireless network supporting extended coverage of service
US11265371B2 (en) Content distribution using ad hoc mesh networks
KR100959570B1 (en) Method, system and arrangements for setting up and maintaining a WLAN connection within predictably moving vehicles
JP4237052B2 (en) Pre-adjusting the return link for handoff between coverage areas traversed by the mobile transceiver platform
US10771830B2 (en) Systems and methods for managing content distribution to an in-transit media system
US20100229205A1 (en) Cellular Television Broadcast System
US11778450B2 (en) Multicast handover for mobile communications
JP2017518660A (en) Distribution method and distribution apparatus
US20230388561A1 (en) Content distribution and mobile wireless mesh networks
EP2375586A1 (en) Satellite communication system and method for transmitting data
US9929795B2 (en) Telecommunication network architecture
CN113691544B (en) Network scheduling method
CN113853024B (en) Data transmission method, system, device and storage medium
CN113709580B (en) Content delivery network system
CN113691881B (en) Streaming media on-demand method and system
KR20030084782A (en) Method and apparatus for receiving a signal from an artificial satellite, signal transmitting method, and information system for receiving and transmitting an information to and from an artificial satellite
CN116827420A (en) Satellite data management method, device, equipment and storage medium
SES Use Cases and Scenarios of 5G Integrated Satellite-Terrestrial Networks for Enhanced Mobile Broadband: The SaT5G Approach

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant