CN108964745B - Data processing method, network architecture, electronic device and readable storage medium - Google Patents

Data processing method, network architecture, electronic device and readable storage medium Download PDF

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CN108964745B
CN108964745B CN201810716659.5A CN201810716659A CN108964745B CN 108964745 B CN108964745 B CN 108964745B CN 201810716659 A CN201810716659 A CN 201810716659A CN 108964745 B CN108964745 B CN 108964745B
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satellite
service request
geo
identifier
service
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CN108964745A (en
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李宁
邓中亮
季晔莉
隋钰童
刘姜旺
劳星淇
张云鹏
胡浪
苏桐
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Beijing University of Posts and Telecommunications
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Beijing University of Posts and Telecommunications
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502—Airborne stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/195—Non-synchronous stations

Abstract

The embodiment of the invention provides a data processing method, a network architecture, electronic equipment and a readable storage medium, which are applied to the technical field of satellite communication, wherein the method comprises the steps that after a first ES receives a service request sent by UE, if the fact that service data requested by the UE are cached in a second ES is judged, the service request, address identifiers of the first ES and the second ES are sent to an L EO satellite, a L EO satellite sends the service request, the address identifiers of the first ES and the second ES and identifiers of the first ES and the second ES to a ground controller through a GEO satellite, the ground controller determines a routing path of the service data according to network information and parameter information in the service request, a start L EO satellite in the routing path sends the request to the second ES and receives the service data returned by the second ES, and the service data are sent to UE. after being sequentially processed through a pipeline in P4 exchangers of all L EO satellites in the routing path.

Description

Data processing method, network architecture, electronic device and readable storage medium
Technical Field
The present invention relates to the field of satellite communications technologies, and in particular, to a data processing method, a network architecture, an electronic device, and a readable storage medium.
Background
Currently, the widespread use of mobile devices by users to generate and consume digital media content produces a large amount of data traffic that has been difficult to efficiently afford by current terrestrial mobile networks. Satellite communication networks offer a number of advantages over conventional terrestrial networks due to their long transmission distances, wide coverage areas, and freedom from terrain. With the deployment of the next generation of high capacity satellites in recent years, satellite communication technology is in a state of explosive development. Although great advances have been made in satellite communications technology, satellite networks are generally inflexible to update and reconfigure because they typically use static pre-configurations, resulting in very high maintenance costs for the satellite network. And when software/hardware updates are required, introducing new communication technologies, algorithms and protocols into the satellite network is very inflexible, consuming not only a huge investment, but also a long time.
The SDN (Software Defined Network) separates a control plane and a data plane of a Network, and greatly improves the flexibility and the programmability of the Network. The SDN has a logically centralized control plane and implements network control through a unified open southbound programming interface. Compared with the traditional network, the network deployment mode of the SDN can effectively improve network management, control management and data processing. The introduction of SDN into satellite communication networks helps to reduce operational capital, enhance network performance and improve quality of service. Most of the related work of the existing software-defined satellite network architecture and SDN routing is performed based on OpenFlow, which can only guide data flow processing through flow table items on the solidified switch data processing logic, resulting in tedious signaling interaction between the switch and the controller, thereby reducing QoS (Quality of service) of the flow. For example, in a larger SDN network, communication between a centralized controller and geographically distributed switches may require a long latency, because each time a new flow arrives, the OpenFlow switch cannot perform match-action operation on a data packet, and must send a packet-in message to query the controller, and then the controller issues a corresponding flow table, so that the controller needs to set a flow table on each OpenFlow switch in the way along the routing path of the flow.
In the existing SDN network routing calculation and control method, a network can be divided into a plurality of sub-networks, different routing calculation and control methods are applied in the sub-networks and among the sub-networks, and meanwhile, a routing entry aggregation means based on an OpenFlow protocol is utilized to reduce the calculation complexity so as to improve the network utilization rate. Although the method reduces the computational complexity, the method still extracts an effective matching domain after receiving a routing request triggered by a packet-in message, generates a flow table item which is not strictly matched with the current flow, realizes the aggregation of flow tables among subnets, and issues the flow tables, wherein a long waiting time delay is still needed. This problem is particularly acute in satellite networks, where data transmission delays are long, due to the inevitably long propagation delays of the satellite network links.
Disclosure of Invention
Embodiments of the present invention provide a data processing method, a network architecture, an electronic device, and a readable storage medium, so as to reduce data transmission delay in a satellite network. The specific technical scheme is as follows:
the embodiment of the invention provides a data processing method which is applied to a hybrid orbit satellite network, wherein the hybrid orbit satellite network comprises a ground controller, a plurality of geosynchronous orbit GEO satellites, a plurality of low-earth orbit L EO satellites, a plurality of ground stations ES and terminal equipment UE, and the method comprises the following steps:
after receiving a service request sent by the UE, a first ES determines whether service data corresponding to the service request exists in the multiple ESs by querying a unified content tag UC L;
if so, and determining that the service data is cached in a second ES, the first ES sending the service request, the address identifier of the first ES and the address identifier of the second ES to the first L EO satellite, the first ES and the first L EO satellite having an established satellite-to-ground connection therebetween;
the first L EO satellite sending the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a first GEO satellite, an inter-layer link having been established between the first L EO satellite and the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller calculates a routing path of the service data through a quality of service routing algorithm according to network information and parameter information in the service request, determines all L EO satellites contained in the routing path, generates a configuration file through a P4 program, sends the configuration file to all L EO satellites contained in the routing path through the first GEO satellite, sends source routing information to a start L EO satellite in all L EO satellites contained in the routing path through the first GEO satellite, and establishes a satellite-ground connection between the start L EO satellite and the second ES;
all L EO satellites included in the routing path update switch configuration inside the routing path according to the received configuration file, and the initial L EO satellite sends a request for the service data to the second ES;
after the start L EO satellite receives the service data returned by the second ES, when pipeline processing is performed on the service data in a P4 switch, the source routing information is added to a protocol field of the service data, and a data packet processed by the start L EO satellite is sent to a L EO satellite next to the start L EO satellite in the routing path according to the source routing information;
for each L EO satellite in the routing path after the start L EO satellite and before the first L EO satellite in the routing path, in order in the routing path, performing the following steps in sequence:
after receiving the data packet transmitted by the previous L EO satellite of the L EO satellite, performing pipeline processing in a P4 switch on the received data packet, and transmitting the processed data packet of the L EO satellite to the next L EO satellite of the L EO satellite according to the source routing information, wherein the first L EO satellite is the destination L EO satellite in the routing path;
the first L EO satellite, after receiving a data packet sent by a preceding L EO satellite of the first L EO satellite, sends the received data packet to a first ES, which sends the received data packet to the UE.
Optionally, after the first ES determines whether the service data corresponding to the service request exists in the multiple ESs by querying the UC L, the method further includes:
and if the service data exists and the service data is cached locally, the first ES sends the service data to the UE.
Optionally, after the first L EO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the first GEO satellite, before the ground controller calculates a routing path of the service request through a quality of service routing algorithm according to network information and parameter information in the service request, the method further includes:
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite forwards the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, and the second GEO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller.
Optionally, after the first ES determines whether the service data corresponding to the service request exists in the multiple ESs by querying the UC L, the method further includes:
if not, the first ES sends the service request and the address identifier of the first ES to the first L EO satellite, the first L EO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller judges whether a L EO satellite which establishes satellite-ground connection with the first ES is the first L EO satellite or not according to current network topology information, the address identifier of the first ES and the identifier of the first L EO satellite, if so, the ground controller gradually sends service data corresponding to the service request acquired from the Internet to the UE according to an opposite path, and the opposite path is a path opposite to the sending direction of the service request from the UE to the ground controller.
Optionally, after the first L EO satellite transmits the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the first GEO satellite, before the ground controller determines whether the L EO satellite currently establishing a satellite-ground connection with the first ES is the first L EO satellite according to current network topology information, the address identifier of the first ES, and the identifier of the first L EO satellite, the method further includes:
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite forwards the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, and the second GEO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller.
Optionally, after the determining whether the L EO satellite currently establishing the satellite-ground connection with the first ES is the first L EO satellite, the method further includes:
if not, the ground controller sends the service data corresponding to the service request acquired from the internet to a second L EO satellite through the first GEO satellite, the second L EO satellite sends the service data to the first ES, the first ES sends the service data to the UE, and the second L EO satellite is a L EO satellite which establishes satellite-ground connection with the first ES at present.
An embodiment of the present invention further provides a network architecture, including:
a ground controller, a plurality of geosynchronous orbit GEO satellites, a plurality of low earth orbit L EO satellites, a plurality of ground stations ES, and a terminal device UE, wherein,
the first ES is used for judging whether service data corresponding to the service request exists in the plurality of ESs by inquiring a unified content tag UC L after receiving the service request sent by the UE, if so, determining that the service data is cached in a second ES, and sending the service request, the address identifier of the first ES and the address identifier of the second ES to the first L EO satellite, wherein a satellite-ground connection is established between the first ES and the first L EO satellite;
the first L EO satellite to send the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a first GEO satellite, an inter-layer link having been established between the first L EO satellite and the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite is configured to send the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller;
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite is configured to forward the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, the second GEO satellite transmits the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller is used for calculating a routing path of the service data through a service quality routing algorithm according to network information and parameter information in the service request, determining all L EO satellites contained in the routing path, generating a configuration file through a P4 program, sending the configuration file to all L EO satellites contained in the routing path through the first GEO satellite, and enabling all L EO satellites contained in the routing path to update switch configuration in the ground controller according to the received configuration file;
the ground controller is further configured to send source routing information to a start L EO satellite among all L EO satellites included in the routing path through the first GEO satellite, so that the start L EO satellite sends a request for the service data to the second ES, after receiving the service data returned by the second ES, when performing pipeline processing in a P4 switch on the service data, add the source routing information to a protocol field of the service data, and send a data packet processed by the start L EO satellite to a next EO satellite L EO satellite of the start L EO satellite in the routing path according to the source routing information, where a satellite-ground connection is established between the start L EO satellite and the second ES;
for each L EO satellite in the routing path after the starting L EO satellite and before the first L EO satellite in the routing path, in order in the routing path, after receiving a packet sent by a previous L EO satellite of the L EO satellite, performing pipeline processing in a P4 switch on the received packet, and sending the processed packet of the L EO satellite to a next L EO satellite of the L EO satellite according to the source routing information, wherein the first L EO satellite is a destination L EO satellite in the routing path;
the first L EO satellite is further configured to send the received data packets to a first ES after receiving the data packets sent by the preceding L EO satellite of the first L EO satellite, the first ES sending the received data packets to the UE.
Optionally, in the network architecture of the embodiment of the present invention,
the first ES is further configured to, after receiving a service request sent by the UE, determine, by querying the UC L, that service data corresponding to the service request exists in the multiple ESs, cache the service data locally, and send the service data to the UE.
Optionally, in the network architecture of the embodiment of the present invention,
the first ES is further configured to send the service request and an address identifier of the first ES to the first L EO satellite if it is determined by querying UC L that service data corresponding to the service request does not exist in the multiple ESs;
the first L EO satellite, further to send the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite is further configured to send the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller;
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite is further configured to forward the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, the second GEO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller is further configured to determine, according to current network topology information, the address identifier of the first ES, and the identifier of the first L EO satellite, whether the L EO satellite currently establishing a satellite-ground connection with the first ES is the first L EO satellite, if so, the ground controller gradually sends service data corresponding to the service request acquired from the internet to the UE according to an opposite path, where the opposite path is a path opposite to a sending direction of the service request from the UE to the ground controller.
The ground controller is further configured to, if it is determined that the L EO satellite currently establishing a satellite-ground connection with the first ES is not the first L EO satellite, send service data corresponding to the service request acquired from the internet to a second L EO satellite through the first GEO satellite, send the service data to the first ES by the second L EO satellite, send the service data to the UE by the first ES, and determine that the second L EO satellite is a L EO satellite currently establishing a satellite-ground connection with the first ES.
An embodiment of the present invention provides an electronic device, including: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
the memory is used for storing a computer program;
the processor is configured to implement the steps of any of the data processing methods described above when executing the program stored in the memory.
An embodiment of the present invention provides a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the computer program implements the steps of any of the data processing methods described above.
According to the data processing method, the network architecture, the electronic device and the readable storage medium provided by the embodiment of the invention, after the first ES receives the service request sent by the UE, if the service data requested by the UE is judged to be cached in the second ES, the service request, the address identifier of the first ES and the address identifier of the second ES are sent to the first L EO satellite, if the first GEO satellite establishes connection with the ground controller, the first L EO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES and the identifier of the first L EO satellite to the ground controller through the first GEO satellite, the ground controller determines a routing path of the service data according to the network information and parameter information in the service request, sends the generated configuration file to all L EO satellites included in the routing path through the first GEO satellite, sends the source routing information to the initial L EO satellite in all L EO satellites included in the routing path, the initial L EO satellite sends the request to the second ES, receives the service data returned by the second ES, and sends the service data to the EO satellite routing packet through the pipeline exchange packet, and the service packet exchange packet which is reduced by the pipeline exchange policy of the Ethernet, and the Ethernet, the Ethernet exchange packet is reduced by the Ethernet, the Ethernet exchange packet, the Ethernet packet exchange packet is reduced by the Ethernet, and the Ethernet packet, the Ethernet packet is reduced by the Ethernet packet, and the Ethernet.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is an architecture diagram of a hybrid-orbit satellite network according to an embodiment of the present invention;
FIG. 2 is a flow chart of a data processing method according to an embodiment of the present invention;
FIG. 3 is a schematic routing path diagram according to an embodiment of the present invention;
FIG. 4 is a flowchart of a data processing method according to an embodiment of the present invention;
FIG. 5 is a flowchart of a data processing method according to an embodiment of the present invention;
FIG. 6 is a block diagram of a network architecture according to an embodiment of the present invention;
fig. 7 is a block diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem of data transmission time delay in the existing satellite network, embodiments of the present invention provide a data processing method, a network architecture, an electronic device, and a readable storage medium, so as to reduce data transmission time delay in the satellite network.
First, a data processing method provided by an embodiment of the present invention is described in detail below.
The data processing method of the embodiment of the invention is applied to a hybrid Orbit satellite network, and the hybrid Orbit satellite network comprises a ground controller, a plurality of GEO (Geostationary Earth Orbit) satellites, a plurality of L EO (L owEarth Orbit) satellites, a plurality of ES (Earth Station) and a UE (User Equipment), and is shown in fig. 1, wherein fig. 1 is an architecture diagram of the hybrid Orbit satellite network of the embodiment of the invention.
The L EO satellite is used as a data plane node to be responsible for data transmission, the GEO satellite is used as a ground controller agent to be responsible for forwarding of interaction information between the L EO satellite and the ground controller, and the ground controller is used as a controller of the software-defined satellite network to be responsible for directing network behaviors such as forwarding of a data plane.
The hybrid orbit Satellite network architecture shown in fig. 1 IS a double-layer orbit Satellite network, the lower layer and the upper layer represent L EO Satellite network and GEO Satellite network respectively, the number of satellites required for covering the whole earth surface IS different due to different orbit heights, the EO Satellite network of the embodiment of the invention IS described by taking an iridium Satellite system as an example, the iridium Satellite system IS composed of 66L EO satellites (plus 6 spare satellites), the L EO satellites are distributed in 6 polar circular orbital planes, each orbital plane comprises 11L EO satellites 463, each L EO Satellite comprises four IS L s (Inter-Satellite L inks ), the adjacent L EO satellites in the same orbital plane are respectively connected with adjacent L EO satellites in the adjacent orbital planes, in addition, the network architecture of the embodiment of the invention further comprises three GEO satellites, the GEO Satellite 35786km GEO Satellite can cover three GEO satellites, the Inter-GEO links exist between GEO satellites, the GEO Satellite coverage range exists between GEO satellites and the GEO Satellite coverage range exists between GEO Satellite 84 and new GEO Satellite coverage range exists between GEO Satellite 858, when the GEO Satellite coverage Satellite 8984 and new Satellite coverage range exists between GEO Satellite 898, when the Satellite in the Satellite 857 EO Satellite coverage area, the Satellite coverage area IS opened.
The GEO satellite is mainly responsible for Information transfer between a data plane and a ground controller, including L collection of state data of the EO satellite and establishment of a flow table by the ground controller, since the GEO satellite is stationary to the ground and L the EO satellite is continuously moving, therefore, one of the GEO satellites covering the ground controller can be selected as a representative to establish a wireless connection with the ground controller, and the other two GEO satellites are connected with the GEO satellite through an inter-satellite link, the earth surface is divided into three regions, when the L EO satellite moves to a different region, the GEO satellite establishes a wireless connection with the GEO satellite above the region, the contents between the GEO satellite and the GEO satellite are cached by an inter-satellite link, and the contents between the GEO satellite and the GEO satellite are cached in a large amount of hot spot networks, such as a hot spot satellite network is not always available, and the contents are cached in a large amount of internet contents cache, such as a hot spot network cache, a satellite network is not suitable for a large amount of internet content cache, and the internet access of multimedia contents are not available.
Referring to fig. 2, fig. 2 is a flowchart of a data processing method according to an embodiment of the present invention, including the following steps:
s201, after receiving a service request sent by the UE, the first ES queries UC L to determine whether service data corresponding to the service request exists in multiple ESs.
If the UE and the first ES are in the coverage range of the same L EO satellite (the first L EO satellite), the UE sends the service request to the first ES, and the first ES receives the service request, and then judges whether service data corresponding to the service request exists in a plurality of ESs in the hybrid orbit satellite network or not by inquiring UC L.
S202, the first ES judges whether the service data is cached locally.
Specifically, after determining that the service data corresponding to the service request exists in the plurality of ESs, it is further determined whether the service data is cached locally, that is, whether the service data is cached in the first ES is further determined. If not, S203 is executed.
S203, if the service data are determined to be cached in the second ES, the service request, the address identifier of the first ES and the address identifier of the second ES are sent to the first L EO satellite, and satellite-ground connection is established between the first ES and the first L EO satellite.
In the embodiment of the invention, if the ES caching the service data is under different L EO satellite coverage range from the UE, for example, the service data is cached in the second ES, and the second ES is not under the coverage range of the first L EO satellite, since the first ES is under the coverage range of the first L EO satellite, the star-ground connection is established between the first ES and the first L EO satellite, the first ES forwards the service request to the first L EO satellite, and the address identifier of the first ES and the address identifier of the second ES are also sent to the first L EO satellite.
S204, the first L EO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the first GEO satellite, with an inter-layer link established between the first L EO satellite and the first GEO satellite.
After the first L EO satellite receives the service request, the address identifier of the first ES, and the address identifier of the second ES, the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of itself (the first L EO satellite) may be sent to the first GEO satellite in order for the ground controller to determine whether the L EO satellite above the first ES has been handed off in a subsequent step.
S205, if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller.
S206, the ground controller calculates a routing path of service data through a service quality routing algorithm according to the network information and parameter information in the service request, determines all L EO satellites contained in the routing path, generates a configuration file through a P4 program, sends the configuration file to all L EO satellites contained in the routing path through a first GEO satellite, sends source routing information to a start L EO satellite in all L EO satellites contained in the routing path through the first GEO satellite, and establishes a satellite-ground connection between the start L EO satellite and a second ES.
In the embodiment of the present invention, the ground controller may calculate the routing path of the service data through the qos routing algorithm according to the network information and the parameter information in the service request, and determine all L EO satellites included in the routing path, referring to fig. 3, fig. 3 is a schematic diagram of the routing path according to the embodiment of the present invention, it can be seen that the routing path includes a plurality of L EO satellites, and the initial L EO satellite is S15The satellite-ground connection between the starting L EO satellite and the second ES satellite is established, and the destination L EO satellite is S0The destination L EO satellite has established a satellite-to-ground connection with the first ES, obviously terminating L EO and thus the first L EO satellite described above.
The method comprises the steps that P4(Programming Protocol-Independent Packet Processors, Protocol-Independent Packet processing Programming language) is a software-defined network southbound interface Protocol, after a ground controller completes a P4 language program, the program is compiled into a configuration file through a compiler and written into a L EO satellite switch, the configuration file is mainly divided into writing of a data analysis process and writing of a control process, the data analysis part is used for analyzing a network byte stream into a corresponding Protocol message and sending the message into a table for matching and processing, the control process determines the jump relation of the data Packet among different tables, a judgment condition and corresponding operation after judgment are defined in the control program, the data Packet is sent to a next table to be matched, and when the data Packet completes the matching operation of all tables, the data Packet is converted into a stream through an inverse parser and transmitted to a next switch node.
S207, all L EO satellites included in the routing path update the switch configuration in the routing path according to the received configuration file, and the initial L EO satellite sends a request for service data to the second ES.
When a data stream comes to the switch, the parser completes the parsing of the data packet according to the relation between the header protocol field and the field so as to realize the matching action of the subsequent flow table entry.
Meanwhile, the originating L EO satellite sends a request for service data to the second ES, where the request includes UC L of the service data, and the second ES receives the request and then sends the service data to the originating L EO satellite.
And S208, after the start L EO satellite receives the service data returned by the second ES, when the service data is subjected to pipeline processing in the P4 switch, adding the source routing information to the protocol field of the service data, and sending the data packet processed by the start L EO satellite to the next L EO satellite of the start L EO satellite in the routing path according to the source routing information.
In the embodiment of the invention, a starting L EO satellite receives a configuration file and also receives source routing information, a starting L EO satellite reads the source routing information, then writes the source routing information into a metadata memory, then writes the source routing information into a protocol field corresponding to a data packet from metadata, and simultaneously deletes address information of a current switch node.
S209, for each L EO satellite in the routing path after the start L EO satellite and before the first L EO satellite in the routing path, in order in the routing path, performing the following steps in sequence:
after receiving the data packet transmitted by the previous L EO satellite of the L EO satellite, the received data packet is pipelined in the P4 switch, and the processed data packet of the L EO satellite is transmitted to the next L EO satellite of the L EO satellite according to the source routing information, the first L EO satellite being the destination L EO satellite in the routing path.
Similarly, the switch of each L EO satellite preceding the first L EO satellite pipelines the received packet in the P4 switch, see S209 for details, until the node address in the routing information is empty, meaning that the destination L EO satellite has been reached, the routing path in fig. 3 is taken as an example, where the start L EO satellite is S15Destination L EO satellite is S0，S15Sending the processed data packet to S11；S11Performing pipeline processing in P4 switch on the received data packet, and sending the processed data packet to S10；S10Performing pipeline processing in P4 switch on the received data packet, and sending the processed data packet to S9；S9Performing pipeline processing in P4 switch on the received data packet, and sending the processed data packet to S5；S5Performing pipeline processing in P4 switch on the received data packet, and sending the processed data packet to S1；S1Performing pipeline processing in P4 switch on the received data packet, and sending the processed data packet to S0I.e., the packet eventually reaches the destination L EO satellite.
S210, the first L EO satellite, after receiving the data packet sent by the preceding L EO satellite of the first L EO satellite, sends the received data packet to the first ES, and the first ES sends the received data packet to the UE.
In the embodiment of the present invention, after the data packet finally arrives at the first L EO satellite, the first L EO satellite sends the received data packet to the first ES, and the first ES sends the data packet to the UE, thereby completing the routing of the data packet.
The data processing method comprises the steps that after a first ES receives a service request sent by UE, if the service data requested by the UE is judged to be cached in a second ES, the service request, an address identifier of the first ES and an address identifier of the second ES are sent to a first L EO satellite, if the first GEO satellite is connected with a ground controller, the first L EO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES and the identifier of the first L EO satellite to the ground controller, the ground controller determines a routing path of service data according to network information and parameter information in the service request, sends a generated configuration file to all L EO satellites included in the routing path through the first GEO satellite, sends source routing information to an initial L EO satellite in all L EO satellites included in the routing path through the first GEO satellite, the initial EO satellite L sends the request to the second ES, receives service data returned by the second ES, sends the source routing information to an initial EO satellite L EO satellite in all L EO satellites included in the routing path through the first GEO satellite routing path, the initial EO satellite L satellite, the initial EO satellite sends the request to the second ES to the routing path, receives the service data processing method, the method has the advantages that the network data processing method of the method that the method of the invention is implemented by using a simplified network technology of the Ethernet network, the network control packet, the method of the invention, the method of the invention, the invention.
Referring to fig. 4, fig. 4 is a flowchart of a data processing method according to an embodiment of the present invention, and on the basis of the embodiment of fig. 2, the method further includes:
s401, the first ES sends the service data to the UE.
In the embodiment of the present invention, if the first ES knows that the service data corresponding to the service request already exists in the local storage by querying the UC L, the first ES may directly send the service data to the UE.
In the embodiment of fig. 2 or the embodiment of fig. 4, after S204 and before S206, the following steps are further included:
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite forwards the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, and the second GEO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller.
As previously described, only three GEO satellites may cover the globe, and if a first GEO satellite is not connected to a ground controller and a second GEO satellite is connected to the ground controller, indicating that the first GEO satellite cannot communicate with the ground controller, the second GEO satellite may communicate with the ground controller.
Similarly, when the ground controller transmits data to the first GEO satellite, the data may be forwarded to the first GEO satellite through the second GEO satellite.
Referring to fig. 5, fig. 5 is another flowchart of a data processing method according to an embodiment of the present invention, and on the basis of the embodiment of fig. 4, when after receiving a service request, a first ES determines, by querying a UC L, that service data corresponding to the service request does not exist in multiple ESs located in a hybrid orbiting satellite network, the method further includes the following steps:
s501, the first ES sends the service request and the address identifier of the first ES to a first L EO satellite, and the first L EO satellite sends the service request, the address identifier of the first ES and the identifier of the first L EO satellite to a first GEO satellite.
In the embodiment of the invention, when the first ES judges that the service data corresponding to the service request does not exist in the plurality of ESs, the ground controller needs to acquire the service data from the internet, and the service data is returned to UE., then the first ES needs to send the service request and the address identifier of the first ES to the first L EO satellite, and when the first L EO satellite sends the service request and the address identifier of the first ES to the first GEO satellite, the identifier of the first L EO satellite needs to be sent to the first GEO satellite together, so that the ground controller can judge whether the L EO satellite above the first ES has been switched or not after receiving the service request.
S502, if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller.
S503, the ground controller judges whether the L EO satellite which establishes the satellite-ground connection with the first ES is the first L EO satellite or not according to the current network topology information, the address identifier of the first ES and the identifier of the first L EO satellite.
Specifically, the ground controller determines whether the L EO satellite currently establishing the satellite-ground connection with the first ES is the first L EO satellite according to the address identifier of the first ES, the identifier of the first L EO satellite, and the current global network topology information, and if the L EO satellite above the first ES is not switched, that is, the L EO satellite above the first ES is still the first L EO satellite, S504 is executed, otherwise, S505 is executed.
And S504, the ground controller gradually sends the service data corresponding to the service request acquired from the Internet to the UE according to an opposite path, wherein the opposite path is a path opposite to the service request sending direction from the UE to the ground controller.
In the embodiment of the present invention, after acquiring the corresponding service data from the internet, the ground controller may return the service data to the UE according to the original route, that is, if the sending path from the UE to the ground controller is path a and the sending path from the ground controller to the UE is path B, then path a and path B are the same path, but the directions of path a and path B are opposite.
S505, the ground controller sends service data corresponding to the service request acquired from the Internet to a second L EO satellite through a first GEO satellite, a second L EO satellite sends the service data to a first ES, the first ES sends the service data to UE, and the second L EO satellite is a L EO satellite which is currently in satellite-ground connection with the first ES.
If the L EO satellite above the first ES is switched to the second L EO satellite, then the ground controller sends the service data to the second L EO satellite through the first GEO satellite, then the second L EO satellite sends the service data to the first ES, which sends the service data to UE., although if no inter-layer link is established between the second L EO satellite and the first GEO satellite, the ground controller may send the service data to the GEO satellite that has established an inter-layer link with the second L EO satellite, then the GEO satellite sends the service data to the second L EO satellite.
In the embodiment of fig. 5, after S501 and before S503, the data processing method according to the embodiment of the present invention further includes the following steps:
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite forwards the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, and the second GEO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller.
Since this step is similar to the step after S204 and before S206 in the embodiment of fig. 2, it is not repeated herein.
An embodiment of the present invention further provides a network architecture, referring to fig. 6, where fig. 6 is a structural diagram of the network architecture according to the embodiment of the present invention, including:
a ground controller 605, a plurality of GEO satellites, a plurality of L EO satellites, a plurality of ESs, and a UE602, wherein,
the first ES 601 is configured to, after receiving a service request sent by the UE602, determine whether service data corresponding to the service request exists in multiple ESs by querying the unified content tag UC L, and if the service data exists, determine that the service data is cached in a second ES, send the service request, an address identifier of the first ES, and an address identifier of the second ES to a first L EO satellite, where a satellite-to-ground connection has been established between the first ES and the first L EO satellite, the first ES 601 is one of the multiple ES, and the second ES is an ES different from the first ES 601 in the multiple ES;
a first L EO satellite 603 to send the service request, the address identifier of the first ES 601, the address identifier of the second ES, and the identifier of the first L EO satellite 603 to the first GEO satellite 604, the first L EO satellite 603 having an established inter-layer link with the first GEO satellite 604, the first L EO satellite 603 being one of a plurality of L EO satellites;
if the first GEO satellite 603 establishes a connection with the ground controller 605, the first GEO satellite 604 is configured to send the service request, the address identifier of the first ES 601, the address identifier of the second ES, and the identifier of the first L EO satellite 603 to the ground controller 605, the first GEO satellite 604 being one of a plurality of GEO satellites;
if the first GEO satellite 604 does not establish a connection with the ground controller 605, the first GEO satellite 604 is further configured to forward the service request, the address identifier of the first ES 601, the address identifier of the second ES, and the identifier of the first L EO satellite 603 to a second GEO satellite that establishes a connection with the ground controller 605, the second GEO satellite sends the service request, the address identifier of the first ES 601, the address identifier of the second ES, and the identifier of the first L EO satellite 603 to the ground controller 605, the second GEO satellite is a GEO satellite of the plurality of GEO satellites that is different from the first GEO satellite 604;
the ground controller 605 is configured to calculate a routing path of the service data through a quality of service routing algorithm according to the network information and parameter information in the service request, determine all L EO satellites included in the routing path, generate a configuration file through a P4 program, and send the configuration file to all L EO satellites included in the routing path through the first GEO satellite, so that all L EO satellites included in the routing path update switch configuration inside the ground controller according to the received configuration file;
the ground controller 605 is further configured to send the source routing information to a start L EO satellite among all L EO satellites included in the routing path through the first GEO satellite, so that the start L EO satellite sends a request for service data to the second ES, after receiving the service data returned by the second ES, when performing pipeline processing in the P4 switch on the service data, add the source routing information to a protocol field of the service data, and send a packet processed by the start L EO satellite to a next L EO satellite of the start L EO satellite in the routing path according to the source routing information, where a satellite-ground connection has been established between the start L EO satellite and the second ES;
where all L EO satellites included in the routing path are L EO satellites of the L EO satellites, all L EO satellites included in the routing path determined by the ground controller 605 may be different for different service requests, and therefore all L EO satellites included in the routing path are not shown in fig. 6.
For each L EO satellite in the routing path after the starting L EO satellite and before the first L EO satellite in the routing path, in order in the routing path, after receiving a packet sent by the previous L EO satellite of the L EO satellite, performing pipelining within the P4 switch on the received packet, and sending the processed packet of the L EO satellite to the next L EO satellite of the L EO satellite according to source routing information, the first L EO satellite being the destination L EO satellite in the routing path;
the first L EO satellite 603 is further configured to send the received data packets to the first ES after receiving the data packets sent by the preceding L EO satellite of the first L EO satellite, and the first ES sends the received data packets to the UE.
The network architecture of the embodiment of the invention can improve the resource utilization rate by adding the cache in the ES, separate the control plane and the data plane of the satellite network by introducing a software defined network technology, and improve the flexibility and the programmability of the network by adopting a P4 southbound interface protocol, thereby supporting the implementation of a source routing strategy, simplifying the information interaction between a ground controller and a L EO satellite during the transmission of a data packet by the source routing strategy, and reducing the transmission delay of the data packet.
In an implementation manner of the present invention, the first ES 601 is further configured to determine that service data corresponding to the service request exists in the multiple ESs by querying the UC L, and send the service data to the UE when the service data is cached locally.
In the network architecture of the embodiments of the present invention,
the first ES 601 is further configured to send the service request and an address identifier of the first ES to the first L EO satellite if it is determined by querying the UC L that the service data corresponding to the service request does not exist in the multiple ESs;
a first L EO satellite 603, further configured to send the service request, the address identifier of the first ES 601, and the identifier of the first L EO satellite 603 to the first GEO satellite 604;
if the first GEO satellite 604 establishes a connection with the ground controller 605, the first GEO satellite 604 is further configured to send the service request, the address identifier of the first ES 601, and the identifier of the first L EO satellite 603 to the ground controller 605;
if the first GEO satellite 604 does not establish a connection with the ground controller 605, the first GEO satellite 604 is further configured to forward the service request, the address identifier of the first ES 601, and the identifier of the first L EO satellite 603 to a second GEO satellite that establishes a connection with the ground controller 605, and the second GEO satellite transmits the service request, the address identifier of the first ES 601, and the identifier of the first L EO satellite 603 to the ground controller 605.
The ground controller 605 is further configured to determine, according to the current network topology information, the address identifier of the first ES 601, and the identifier of the first L EO satellite 603, whether the L EO satellite currently establishing a satellite-ground connection with the first ES 601 is the first L EO satellite 603, if so, the ground controller 603 gradually sends service data corresponding to the service request acquired from the internet to the UE602 according to a reverse path, where the reverse path is a path from the UE to the ground controller in a direction opposite to a sending direction of the service request.
The ground controller 605 is further configured to, if it is determined that the L EO satellite currently establishing the satellite-ground connection with the first ES 601 is not the first L EO satellite 603, send service data corresponding to the service request acquired from the internet to the second L EO satellite through the first GEO satellite 604, so that the second L EO satellite sends the service data to the first ES, the first ES sends the service data to the UE, the second L EO satellite is a L EO satellite currently establishing the satellite-ground connection with the first ES, and the second L EO satellite is an L EO satellite different from the first L EO satellite 603 among the multiple L EO satellites.
An embodiment of the present invention further provides an electronic device, referring to fig. 7, where fig. 7 is a structural diagram of the electronic device according to the embodiment of the present invention, including: the system comprises a processor 701, a communication interface 702, a memory 703 and a communication bus 704, wherein the processor 701, the communication interface 702 and the memory 703 complete mutual communication through the communication bus 704;
a memory 703 for storing a computer program;
the processor 701 is configured to implement the steps of any of the data processing methods described above when executing the program stored in the memory 703.
It should be noted that the communication bus 704 mentioned in the above electronic device may be a PCI (peripheral component Interconnect) bus, an EISA (Extended Industry standard architecture) bus, or the like. The communication bus 704 may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
The communication interface 702 is used for communication between the above-described electronic apparatus and other apparatuses.
The Memory 703 may include a RAM (Random Access Memory) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The processor 701 may be a general-purpose processor, including: a CPU (Central Processing Unit), an NP (Network Processor), and the like; but also a DSP (Digital signal processing), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component.
In the electronic device of the embodiment of the invention, the processor executes the program stored in the memory, so that after receiving a service request sent by the UE, the first ES sends the service request, the address identifier of the first ES and the address identifier of the second ES to the first L EO satellite if the service data requested by the UE is judged to be cached in the second ES, if the first GEO satellite establishes connection with the ground controller, the first L EO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES and the identifier of the first 5636 EO satellite to the ground controller through the first GEO satellite, the ground controller determines a routing path of the service data according to the network information and parameter information in the service request, sends the generated configuration file to all L EO satellites included in the routing path through the first GEO satellite, sends the source routing information to all L EO satellites included in the routing path through the first GEO satellite, the start EO satellite L sends the request to the second ES, receives the request through the routing policy of the first GEO satellite, sends the source routing information to all L EO satellites through the routing policy of the first GEO satellite, the routing policy, the start EO satellite, the routing policy of the routing packet, and the routing packet, the routing packet is returned to the network via the network router, the network router, the router.
The embodiment of the invention also provides a computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the steps of any data processing method are realized.
When the instructions stored in the computer-readable storage medium of the embodiment of the present invention run on a computer, so that after a first ES receives a service request sent by a UE, if it is determined that service data requested by the UE is cached in a second ES, the first ES sends the service request, an address identifier of the first ES, and an address identifier of the second ES to a first L EO satellite, if the first GEO satellite establishes a connection with a ground controller, the first L EO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first EO satellite to the ground controller through the first GEO satellite, the ground controller determines a routing path of the service data according to network information and parameter information in the service request, sends a generated configuration file to all L EO satellites included in the routing path through the first GEO satellite, sends source routing information to all L EO satellites included in the routing path through the first GEO satellite, the start EO satellites L to send the second ES, receives the request through the routing policy of the first GEO satellite, sends the source routing information to all the EO satellites in L EO satellites through the routing policy of the routing path, and returns the routing policy of the second ES, the routing policy of the network, the routing policy of the EO satellite, the routing policy of the routing table, the policy of the routing table is controlled by the routing table, the policy of the routing table, the routing table manager, the routing policy of the routing table.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, 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 an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the embodiments of the network architecture, the electronic device and the readable storage medium, since they are substantially similar to the embodiments of the method, the description is simple, and the relevant points can be referred to the partial description of the embodiments of the method.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

1. A data processing method, applied to a hybrid-orbit satellite network including a ground controller, a plurality of geosynchronous-orbit GEO satellites, a plurality of low-earth-orbit L EO satellites, a plurality of ground stations ES, and a terminal device UE, the method comprising:
after receiving a service request sent by the UE, a first ES determines whether service data corresponding to the service request exists in the multiple ESs by querying a unified content tag UC L;
if so, and determining that the service data is cached in a second ES, the first ES sending the service request, the address identifier of the first ES and the address identifier of the second ES to a first L EO satellite, the first ES and the first L EO satellite having an established satellite-to-ground connection therebetween;
the first L EO satellite sending the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a first GEO satellite, an inter-layer link having been established between the first L EO satellite and the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller calculates a routing path of the service data through a quality of service routing algorithm according to network information and parameter information in the service request, determines all L EO satellites contained in the routing path, generates a configuration file through a P4 program, sends the configuration file to all L EO satellites contained in the routing path through the first GEO satellite, sends source routing information to a start L EO satellite in all L EO satellites contained in the routing path through the first GEO satellite, and establishes a satellite-ground connection between the start L EO satellite and the second ES;
all L EO satellites included in the routing path update switch configuration inside the routing path according to the received configuration file, and the initial L EO satellite sends a request for the service data to the second ES;
after the start L EO satellite receives the service data returned by the second ES, when pipeline processing is performed on the service data in a P4 switch, the source routing information is added to a protocol field of the service data, and a data packet processed by the start L EO satellite is sent to a L EO satellite next to the start L EO satellite in the routing path according to the source routing information;
for each L EO satellite in the routing path after the start L EO satellite and before the first L EO satellite in the routing path, in order in the routing path, performing the following steps in sequence:
after receiving the data packet transmitted by the previous L EO satellite of the L EO satellite, performing pipeline processing in a P4 switch on the received data packet, and transmitting the processed data packet of the L EO satellite to the next L EO satellite of the L EO satellite according to the source routing information, wherein the first L EO satellite is the destination L EO satellite in the routing path;
the first L EO satellite, after receiving a data packet sent by a preceding L EO satellite of the first L EO satellite, sends the received data packet to a first ES, which sends the received data packet to the UE.
2. The data processing method of claim 1, wherein after the first ES determines whether the service data corresponding to the service request exists in the plurality of ESs by querying UC L, the method further comprises:
and if the service data exists and the service data is cached locally, the first ES sends the service data to the UE.
3. The data processing method of claim 1, wherein after the first L EO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the first GEO satellite, before the ground controller calculates the routing path of the service request through a quality of service routing algorithm according to network information and parameter information in the service request, the method further comprises:
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite forwards the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, and the second GEO satellite sends the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller.
4. The data processing method of claim 1, wherein after the first ES determines whether the service data corresponding to the service request exists in the plurality of ESs by querying UC L, the method further comprises:
if not, the first ES sends the service request and the address identifier of the first ES to the first L EO satellite, the first L EO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller judges whether a L EO satellite which establishes satellite-ground connection with the first ES is the first L EO satellite or not according to current network topology information, the address identifier of the first ES and the identifier of the first L EO satellite, if so, the ground controller gradually sends service data corresponding to the service request acquired from the Internet to the UE according to an opposite path, and the opposite path is a path opposite to the sending direction of the service request from the UE to the ground controller.
5. The data processing method of claim 4, wherein after the first L EO satellite transmits the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the first GEO satellite, before the ground controller determines whether the L EO satellite currently establishing a satellite-ground connection with the first ES is the first L EO satellite based on current network topology information, the address identifier of the first ES, and the identifier of the first L EO satellite, the method further comprises:
if the first GEO satellite does not establish a connection with the ground controller, the first GEO satellite forwards the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to a second GEO satellite that establishes a connection with the ground controller, and the second GEO satellite sends the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller.
6. The data processing method of claim 4, wherein after the determining whether the L EO satellite currently establishing the satellite-to-ground connection with the first ES is the first L EO satellite, the method further comprises:
if not, the ground controller sends the service data corresponding to the service request acquired from the internet to a second L EO satellite through the first GEO satellite, the second L EO satellite sends the service data to the first ES, the first ES sends the service data to the UE, and the second L EO satellite is a L EO satellite which establishes satellite-ground connection with the first ES at present.
7. A network architecture, comprising:
a ground controller, a plurality of geosynchronous orbit GEO satellites, a plurality of low earth orbit L EO satellites, a plurality of ground stations ES, and a terminal device UE, wherein,
the first ES is used for judging whether service data corresponding to the service request exists in the plurality of ESs by inquiring a unified content tag UC L after receiving the service request sent by the UE, if so, determining that the service data is cached in a second ES, and sending the service request, the address identifier of the first ES and the address identifier of the second ES to a first L EO satellite, wherein a satellite-ground connection is established between the first ES and the first L EO satellite;
the first L EO satellite to send the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to a first GEO satellite, an inter-layer link having been established between the first L EO satellite and the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite is configured to send the service request, the address identifier of the first ES, the address identifier of the second ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller is used for calculating a routing path of the service data through a service quality routing algorithm according to network information and parameter information in the service request, determining all L EO satellites contained in the routing path, generating a configuration file through a P4 program, sending the configuration file to all L EO satellites contained in the routing path through the first GEO satellite, and enabling all L EO satellites contained in the routing path to update switch configuration in the ground controller according to the received configuration file;
the ground controller is further configured to send source routing information to a start L EO satellite among all L EO satellites included in the routing path through the first GEO satellite, so that the start L EO satellite sends a request for the service data to the second ES, after receiving the service data returned by the second ES, when performing pipeline processing in a P4 switch on the service data, add the source routing information to a protocol field of the service data, and send a data packet processed by the start L EO satellite to a next EO satellite L EO satellite of the start L EO satellite in the routing path according to the source routing information, where a satellite-ground connection is established between the start L EO satellite and the second ES;
for each L EO satellite in the routing path after the starting L EO satellite and before the first L EO satellite in the routing path, in order in the routing path, after receiving a packet sent by a previous L EO satellite of the L EO satellite, performing pipeline processing in a P4 switch on the received packet, and sending the processed packet of the L EO satellite to a next L EO satellite of the L EO satellite according to the source routing information, wherein the first L EO satellite is a destination L EO satellite in the routing path;
the first L EO satellite is further configured to send the received data packets to a first ES after receiving the data packets sent by the preceding L EO satellite of the first L EO satellite, the first ES sending the received data packets to the UE.
8. The network architecture of claim 7,
the first ES is further configured to send the service request and an address identifier of the first ES to the first L EO satellite if it is determined by querying UC L that service data corresponding to the service request does not exist in the multiple ESs;
the first L EO satellite, further to send the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the first GEO satellite;
if the first GEO satellite establishes a connection with the ground controller, the first GEO satellite is further configured to send the service request, the address identifier of the first ES, and the identifier of the first L EO satellite to the ground controller;
the ground controller is further configured to determine, according to current network topology information, the address identifier of the first ES, and the identifier of the first L EO satellite, whether the L EO satellite currently establishing a satellite-ground connection with the first ES is the first L EO satellite, if so, the ground controller gradually sends service data corresponding to the service request acquired from the internet to the UE according to an opposite path, where the opposite path is a path opposite to a sending direction of the service request from the UE to the ground controller.
9. An electronic device, comprising: the system comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
the memory is used for storing a computer program;
the processor is configured to implement the steps of the data processing method according to any one of claims 1 to 6 when executing the program stored in the memory.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the data processing method according to any one of claims 1 to 6.
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