CN117544247B - Method and device for realizing light weight of spatial information center network and computer storage medium - Google Patents
Method and device for realizing light weight of spatial information center network and computer storage medium Download PDFInfo
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Abstract
The invention discloses a method and a device for realizing the light weight of a spatial information center network, wherein the method comprises the following steps: constructing a space terahertz communication lightweight information center network, wherein the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads; the backbone communication satellite performs multi-beam terahertz communication with one or more other space terahertz communication loads by using a terahertz multi-beam antenna array, realizes networking and network reconstruction of each backbone communication satellite by using an intelligent networking algorithm, performs high-speed and low-energy consumption processing on terahertz communication signals by using a high-energy-efficiency signal processing method, and realizes networking of access nodes by using a lightweight robust access protocol; data is routed between backbone satellites of the backbone satellites and between each backbone satellite and the access node using an information-centric lightweight routing protocol. Aiming at the frequent change of the terahertz network topology, the invention realizes the rapid calculation and the efficient distribution configuration of the optimized inter-satellite route.
Description
Technical Field
The invention relates to the technical field of satellite communication, in particular to a method and a device for realizing the light weight of a spatial information center network.
Background
With the explosion of demands of applications such as satellite internet, 6G, internet of things, remote sensing telemetry, environmental monitoring and the like in the future, satellite communication systems are urgently required to have the capacity of high-speed transmission of tens of Gbps broadband and flexible networking in space. The traditional satellite communication system based on microwaves has the defects of shortage of available frequency resources, serious mutual interference among systems and difficulty in adapting to the increasing requirement of space information communication capacity due to the influence of electronic bottlenecks; however, the space communication technology based on laser has great difficulty in realizing multi-beam communication, tracking aiming under high dynamic conditions and the like. Terahertz waves are located between infrared rays and microwaves, so that the terahertz waves have the straightness and sharpness of light waves and the penetrability and absorbability of microwaves, the communication bandwidth can be greatly improved, the tracking difficulty is reduced, and the miniaturization and planarization of an antenna system are realized, so that the terahertz waves become an important direction for constructing a next-generation spatial information communication network.
The future space information communication network is in need of large-scale data networking transmission, and the information center network is used as a novel network architecture for decoupling information and bottom equipment, can adapt to the characteristics of long transmission distance, discontinuous links, high packet loss rate and the like, and becomes one of the most potential future space network protocols. In order to fully exert the advantages of the information center network as a space network protocol and simultaneously adapt to the characteristics of space terahertz networking communication, development of space terahertz communication lightweight information center network system design is urgently needed, and support is provided for construction of a next-generation high-speed, flexible, high-energy-efficiency and strong Lu Bang space information communication network.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method and a device for realizing the light weight of a spatial information center network, wherein the spatial terahertz communication light weight information center network realizes the data interaction with an access node through a terahertz access link; taking a lightweight information center network protocol as a space network protocol; each backbone communication satellite realizes multi-beam terahertz communication by using a terahertz multi-beam antenna array, and networking and network reconstruction of each backbone communication satellite are realized by using an intelligent networking algorithm; high-speed and low-energy consumption processing of terahertz communication signals is realized by adopting a high-energy-efficiency signal processing technology; adopting a lightweight robust access protocol to realize network access of access nodes; and adopting a lightweight routing protocol taking information as a center to perform data routing. The invention has the advantages that: the system has good expandability; aiming at the frequent change of the terahertz network topology, the rapid calculation and the efficient distribution configuration of the optimized inter-satellite route are realized; the system robustness and the resource utilization efficiency can be improved, and the system is more flexible and light.
In order to solve the technical problem, a first aspect of the embodiment of the present invention discloses a method for implementing light weight of a spatial information center network, where the method includes:
S1, constructing a space terahertz communication lightweight information center network, wherein the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads, and N is an integer;
s2, each backbone communication satellite performs multi-beam terahertz communication with one or more other space terahertz communication loads by using a terahertz multi-beam antenna array;
s3, each backbone communication satellite realizes networking and network reconstruction of each backbone communication satellite by utilizing an intelligent networking algorithm;
s4, each backbone communication satellite performs high-speed and low-energy consumption processing on the terahertz communication signals by using a high-energy-efficiency signal processing method;
s5, each backbone communication satellite realizes network access of the access node by utilizing a lightweight robust access protocol;
And S6, data routing is performed among backbone communication satellites of the backbone communication satellites and among the backbone communication satellites and the access nodes by using a lightweight routing protocol centering on information.
In a first aspect of the embodiment of the present invention, in the spatial terahertz communication lightweight information center network, each backbone communication satellite is networked through an inter-satellite terahertz link, and data interaction with NGSO (Non-Geostationary-SATELLITE ORBIT Non-stationary orbit satellite orbit) constellations, small satellite clusters and access nodes of other access satellites is implemented through an inter-satellite terahertz access link.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, each backbone communication satellite performs multi-beam terahertz communication with one or more other spatial terahertz communication loads by using a terahertz multi-beam antenna array, including:
s21, interweaving and arranging a plurality of terahertz antenna subarrays by the backbone communication satellite to obtain a dense and integrated phased array antenna unit array;
s22, generating a terahertz wave beam by utilizing each phased array antenna unit array, and carrying out wave beam large-angle continuous scanning and grating lobe suppression wave beam forming on the generated terahertz wave beam;
S23, combining a plurality of phased array antenna unit arrays at an array spacing greater than half of the working wavelength to obtain a terahertz multi-beam antenna array;
s24, carrying out multi-beam terahertz communication with one or more other space terahertz communication loads by using the terahertz multi-beam antenna array.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, each backbone communication satellite performs high-speed and low-energy consumption processing on a terahertz communication signal by using an energy-efficient signal processing method, where the processing method includes:
S41, after receiving terahertz signals from other backbone satellites or access nodes, the space terahertz communication load carried by the backbone communication satellite down-converts the terahertz signals to an intermediate frequency by utilizing a local oscillator terahertz signal source to obtain a receiving intermediate frequency signal;
S42, the backbone communication satellite performs sparse sampling on the received intermediate frequency signals to obtain undersampled signals of the received intermediate frequency signals;
s43, the backbone communication satellite utilizes a robust sparse reconstruction algorithm to reconstruct the undersampled signals of the received intermediate frequency signals to obtain baseband signals carried by terahertz signals, and high-speed and low-energy consumption processing of the terahertz communication signals is achieved.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the lightweight robust access protocol adopts a protocol architecture design with control and service separated;
The control plane is used for receiving and transmitting control messages, and the data plane is used for acquiring higher system capacity by using a high frequency band;
The protocol stack architecture of the lightweight robust access protocol realizes data interaction of protocol layers between protocol stacks in a cross-layer message mode;
The MAC layer of the lightweight robust access protocol improves the high utilization rate of resources in a time slot division mode, and the adopted time slot length can be dynamically adjusted according to the number of network access nodes;
The network access node starts from the Beacon time period after initialization in the life cycle of the network, performs network access through the broadcasting of the Beacon time period, and occupies a transmission time slot through the CAP time period after network access to complete data transmission;
The frame structure of the lightweight robust access protocol comprises a Beacon period frame format, an association request frame, an association reply frame, a time slot request frame, a time slot reply frame, an ACK frame, a data frame and a beam forming frame.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the information-centric lightweight routing protocol adopts an information-centric global dynamic routing design;
The information-centered lightweight routing protocol utilizes a hierarchical naming mode to divide the communication range between satellites;
the LSA content is issued with the assistance of a synchronous application protocol;
Performing multipath transmission by using an SPF algorithm for removing the first-hop neighbors;
acquiring space topology information and flow prediction information by using a time-varying graph;
And calculating the next optimal global route information in real time by using the satellite-borne controller.
As an optional implementation manner, in the first aspect of the embodiment of the present invention, the routing data between backbone communication satellites of the backbone communication satellites and between each backbone communication satellite and the access node by using the information-centric lightweight routing protocol includes:
S61, the information-centered lightweight routing protocol utilizes a satellite-borne controller to issue a routing update table to the satellite-borne network load to be adjusted according to the routing update condition of each satellite-borne network load;
S62, the satellite-borne network load to be adjusted adjusts corresponding network resources and the routing table according to the received routing adjustment information in the routing update table, and achieves global optimal data routing.
The second aspect of the embodiment of the invention discloses a device for realizing the light weight of a spatial information center network, which comprises:
The network construction module is used for constructing a space terahertz communication lightweight information center network, and the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads;
The multi-beam terahertz communication module is used for the backbone communication satellite and performs multi-beam terahertz communication with one or more other space terahertz communication loads by utilizing a terahertz multi-beam antenna array;
the networking module is used for the backbone communication satellites and realizing networking and network reconstruction of the backbone communication satellites by utilizing an intelligent networking algorithm;
the high-energy-efficiency signal processing module is used for the backbone communication satellite and is used for processing the terahertz communication signals at high speed and with low energy consumption by utilizing a high-energy-efficiency signal processing method;
The access module of the access node is used for the backbone communication satellite to realize access of the access node by utilizing a lightweight robust access protocol;
And the data routing module is used for performing data routing between backbone communication satellites of the backbone communication satellites and between each backbone communication satellite and the access node by using a lightweight routing protocol taking information as a center.
In a second aspect of the embodiment of the present invention, in the spatial terahertz communication lightweight information center network, each backbone communication satellite is networked through an inter-satellite terahertz link, and data interaction with NGSO constellations, small satellite clusters and access nodes of other access satellites is implemented through an inter-satellite terahertz access link.
In a second aspect of the present invention, the multi-beam terahertz communication method includes:
s21, interweaving and arranging a plurality of terahertz antenna subarrays by the backbone communication satellite to obtain a dense and integrated phased array antenna unit array;
s22, generating a terahertz wave beam by utilizing each phased array antenna unit array, and carrying out wave beam large-angle continuous scanning and grating lobe suppression wave beam forming on the generated terahertz wave beam;
S23, combining a plurality of phased array antenna unit arrays at an array spacing greater than half of the working wavelength to obtain a terahertz multi-beam antenna array;
s24, carrying out multi-beam terahertz communication with one or more other space terahertz communication loads by using the terahertz multi-beam antenna array.
In a second aspect of the embodiment of the present invention, the high-speed and low-energy consumption processing of the terahertz communication signal by using an energy-efficient signal processing method by using each backbone communication satellite includes:
S41, after receiving terahertz signals from other backbone satellites or access nodes, the space terahertz communication load carried by the backbone communication satellite down-converts the terahertz signals to an intermediate frequency by utilizing a local oscillator terahertz signal source to obtain a receiving intermediate frequency signal;
S42, the backbone communication satellite performs sparse sampling on the received intermediate frequency signals to obtain undersampled signals of the received intermediate frequency signals;
s43, the backbone communication satellite utilizes a robust sparse reconstruction algorithm to reconstruct the undersampled signals of the received intermediate frequency signals to obtain baseband signals carried by terahertz signals, and high-speed and low-energy consumption processing of the terahertz communication signals is achieved.
As an optional implementation manner, in the second aspect of the embodiment of the present invention, the lightweight robust access protocol adopts a protocol architecture design with control and service separated;
The control plane is used for receiving and transmitting control messages, and the data plane is used for acquiring higher system capacity by using a high frequency band;
The protocol stack architecture of the lightweight robust access protocol realizes data interaction of protocol layers between protocol stacks in a cross-layer message mode;
The MAC layer of the lightweight robust access protocol improves the high utilization rate of resources in a time slot division mode, and the adopted time slot length can be dynamically adjusted according to the number of network access nodes;
The network access node starts from the Beacon time period after initialization in the life cycle of the network, performs network access through the broadcasting of the Beacon time period, and occupies a transmission time slot through the CAP time period after network access to complete data transmission;
The frame structure of the lightweight robust access protocol comprises a Beacon period frame format, an association request frame, an association reply frame, a time slot request frame, a time slot reply frame, an ACK frame, a data frame and a beam forming frame.
As an optional implementation manner, in the second aspect of the embodiment of the present invention, the information-centric lightweight routing protocol adopts an information-centric global dynamic routing design;
The information-centered lightweight routing protocol utilizes a hierarchical naming mode to divide the communication range between satellites;
the LSA content is issued with the assistance of a synchronous application protocol;
Performing multipath transmission by using an SPF algorithm for removing the first-hop neighbors;
acquiring space topology information and flow prediction information by using a time-varying graph;
And calculating the next optimal global route information in real time by using the satellite-borne controller.
In a second aspect of the present invention, the data routing using the information-centric lightweight routing protocol between backbone communication satellites of the backbone communication satellites and between each backbone communication satellite and the access node includes:
S61, the information-centered lightweight routing protocol utilizes a satellite-borne controller to issue a routing update table to the satellite-borne network load to be adjusted according to the routing update condition of each satellite-borne network load;
S62, the satellite-borne network load to be adjusted adjusts corresponding network resources and the routing table according to the received routing adjustment information in the routing update table, and achieves global optimal data routing.
The third aspect of the present invention discloses another device for realizing the light weight of a spatial information center network, the device comprising:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program codes stored in the memory to execute part or all of the steps in the method for realizing the light weight of the spatial information center network disclosed in the first aspect of the embodiment of the invention.
A fourth aspect of the present invention discloses a computer-readable storage medium storing computer instructions for executing some or all of the steps in the spatial information center network lightweight implementation method disclosed in the first aspect of the present invention when the computer instructions are called.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
(1) The invention supports the backbone satellite communication of a plurality of space-carrying terahertz communication loads, can carry out data interaction with NGSO constellations, small satellite clusters and access nodes of other access satellites through terahertz access links, and has good system expandability;
(2) The invention adopts an intelligent networking algorithm to realize networking and network reconstruction of each backbone communication satellite, adopts a high-energy-efficiency signal processing technology to realize high-speed and low-energy-consumption processing of terahertz communication signals, adopts a lightweight robust access protocol to realize networking of access nodes, adopts a lightweight routing protocol taking information as a center to carry out data routing, improves the robustness of the system and the utilization efficiency of resources, and is more flexible and lightweight.
(3) Aiming at the frequent change of the terahertz network topology, the invention realizes the rapid calculation and the efficient distribution configuration of the optimized inter-satellite route.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for realizing the lightweight of a spatial information center network according to an embodiment of the present invention;
Fig. 2 is a schematic diagram of a network architecture and an implementation method of a space terahertz communication lightweight information center disclosed in an embodiment of the present invention;
Fig. 3 is a schematic structural diagram of a device for realizing the lightweight of a spatial information center network according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another device for implementing light weight of a spatial information center network according to an embodiment of the present invention.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or device that comprises a list of steps or elements is not limited to the list of steps or elements but may, in the alternative, include other steps or elements not expressly listed or inherent to such process, method, article, or device.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
The invention discloses a method and a device for realizing the light weight of a spatial information center network, wherein the method comprises the following steps: the invention discloses a method and a device for realizing the light weight of a spatial information center network, wherein the method comprises the following steps: constructing a space terahertz communication lightweight information center network, wherein the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads; the backbone communication satellite performs multi-beam terahertz communication with one or more other space terahertz communication loads by using a terahertz multi-beam antenna array, realizes networking and network reconstruction of each backbone communication satellite by using an intelligent networking algorithm, performs high-speed and low-energy consumption processing on terahertz communication signals by using a high-energy-efficiency signal processing method, and realizes networking of access nodes by using a lightweight robust access protocol; data is routed between backbone satellites of the backbone satellites and between each backbone satellite and the access node using an information-centric lightweight routing protocol. Aiming at the frequent change of the terahertz network topology, the invention realizes the rapid calculation and the efficient distribution configuration of the optimized inter-satellite route. The following will describe in detail.
Example 1
Referring to fig. 1, fig. 1 is a flow chart of a method for implementing the light weight of a spatial information center network according to an embodiment of the present invention. The method for realizing the light weight of the spatial information center network described in fig. 1 is applied to the technical field of satellite communication, and realizes the light weight of the spatial information center network based on inter-satellite terahertz communication. As shown in fig. 1, the method for implementing the lightweight spatial information center network may include the following operations:
S1, constructing a space terahertz communication lightweight information center network, wherein the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads, and N is an integer;
s2, each backbone communication satellite performs multi-beam terahertz communication with one or more other space terahertz communication loads by using a terahertz multi-beam antenna array;
s3, each backbone communication satellite realizes networking and network reconstruction of each backbone communication satellite by utilizing an intelligent networking algorithm;
s4, each backbone communication satellite performs high-speed and low-energy consumption processing on the terahertz communication signals by using a high-energy-efficiency signal processing method;
s5, each backbone communication satellite realizes network access of the access node by utilizing a lightweight robust access protocol;
And S6, data routing is performed among backbone communication satellites of the backbone communication satellites and among the backbone communication satellites and the access nodes by using a lightweight routing protocol centering on information.
Optionally, in the space terahertz communication lightweight information center network, all backbone communication satellites are networked through inter-satellite terahertz links, and data interaction with NGSO constellations, small satellite clusters and other access nodes accessed to satellites is realized through inter-satellite terahertz access links. Fig. 2 is a schematic diagram of a spatial terahertz communication lightweight information center network architecture and an implementation method according to an embodiment of the present invention.
Optionally, each backbone communication satellite performs multi-beam terahertz communication with one or more other spatial terahertz communication loads by using a terahertz multi-beam antenna array, including:
s21, interweaving and arranging a plurality of terahertz antenna subarrays by the backbone communication satellite to obtain a dense and integrated phased array antenna unit array;
s22, generating a terahertz wave beam by utilizing each phased array antenna unit array, and carrying out wave beam large-angle continuous scanning and grating lobe suppression wave beam forming on the generated terahertz wave beam;
Beam high angle continuous scanning: this is achieved by adjusting the phase setting of the phased array antenna element array so that the transmitted or received beam can be scanned continuously over a large angular range. This allows monitoring or communication over a wide area without moving the entire antenna.
Grating lobe suppressed beamforming: grating lobes refer to additional unnecessary beams generated during beamforming, typically in the vicinity of the desired beam. Grating lobe suppression is the suppression or attenuation of these unwanted grating lobes by appropriate signal processing algorithms to achieve more accurate beam steering.
In combination, the beam large-angle continuous scanning and grating lobe suppression beam forming are a technology, the beam of the terahertz wave can be continuously scanned in a wide angle range through the phase and amplitude adjustment of the phased array antenna unit array, and the shape of the beam is optimized through the grating lobe suppression technology, so that more accurate and efficient signal transmission or reception is realized.
S23, combining a plurality of phased array antenna unit arrays at an array spacing greater than half of the working wavelength to obtain a terahertz multi-beam antenna array;
s24, carrying out multi-beam terahertz communication with one or more other space terahertz communication loads by using the terahertz multi-beam antenna array.
Optionally, the high-speed and low-energy consumption processing is performed on the terahertz communication signals by using an energy-efficient signal processing method by using each backbone communication satellite, including:
S41, after receiving terahertz signals from other backbone satellites or access nodes, the space terahertz communication load carried by the backbone communication satellite down-converts the terahertz signals to an intermediate frequency by utilizing a local oscillator terahertz signal source to obtain a received intermediate frequency signal;
S42, the backbone communication satellite performs sparse sampling on the received intermediate frequency signals to obtain undersampled signals of the received intermediate frequency signals;
Sparse sampling is sampling a signal at a lower sampling rate in the time or frequency domain, but still capturing its important features. According to the characteristics of the signal: the frequency distribution and the pulse shape of the signal select sampling points on different frequencies and pulse shapes, and the sampling rate is reduced.
S43, the backbone communication satellite utilizes a robust sparse reconstruction algorithm to reconstruct the undersampled signals of the received intermediate frequency signals to obtain baseband signals carried by terahertz signals, and high-speed and low-energy consumption processing of the terahertz communication signals is achieved.
The robust sparse reconstruction algorithm comprises a gradient descent class method, a neighbor operator method and a data-driven robust sparse reconstruction method.
Optionally, the lightweight robust access protocol is designed by adopting a protocol architecture with control and service separated;
The control plane is used for receiving and transmitting control messages, and the data plane is used for acquiring higher system capacity by using a high frequency band;
The protocol stack architecture of the lightweight robust access protocol realizes data interaction of protocol layers between protocol stacks in a cross-layer message mode;
The MAC layer of the lightweight robust access protocol improves the high utilization rate of resources in a time slot division mode, and the adopted time slot length can be dynamically adjusted according to the number of network access nodes;
The network access node starts from the Beacon time period after initialization in the life cycle of the network, performs network access through the broadcasting of the Beacon time period, and occupies a transmission time slot through the CAP time period after network access to complete data transmission; in a wireless communication network, such as an internet of things (IoT) or a Wireless Sensor Network (WSN), a time division multiplexing method is typically used to coordinate the communication activities of the various nodes. In this case, the "Beacon period" and the "CAP period" are two important periods of time for scheduling the node's networking and data transmission activities.
The Beacon period is a predetermined period of time in the network for periodically broadcasting network information so that new nodes can "hear" the network's presence and perform network entry operations during this period of time.
The frame structure of the lightweight robust access protocol comprises a Beacon period frame format, an association request frame, an association reply frame, a time slot request frame, a time slot reply frame, an ACK frame, a data frame and a beam forming frame.
The CAP (Contention Access Period) period is a period of time following the Beacon period to allow nodes to contend for or preempt a transmit slot for data transmission.
"LSA" refers to "Link-STATE ADVERTISEMENT" and Link state advertisement. Is data for propagating network topology information in a link state routing protocol. Link state routing protocols, such as OSPF (Open short PATH FIRST) and IS-IS (INTERMEDIATE SYSTEM to INTERMEDIATE SYSTEM), use LSAs to describe routers, links, and routing information in a network in order to build routing tables and compute Shortest paths.
Optionally, the information-centric lightweight routing protocol adopts an information-centric global dynamic routing design;
The information-centered lightweight routing protocol utilizes a hierarchical naming mode to divide the communication range between satellites;
the LSA content is issued with the assistance of a synchronous application protocol;
Performing multipath transmission by using an SPF algorithm for removing the first-hop neighbors;
The SPF algorithm that removes the first-hop neighbors is a way to bypass the direct neighbor nodes when computing the shortest path.
The idea of the "SPF algorithm that removes the first-hop neighbors" is to calculate paths from neighbor nodes instead of considering paths directly from source nodes to neighbor nodes, thereby obtaining multiple paths that bypass the neighbor nodes. More flexibility and performance optimization may be provided, particularly in network environments where high reliability, load balancing, or failure recovery is required.
(1) Collecting neighbor information: for each node, information of its direct neighbor node needs to be collected first, including link overhead, neighbor node identification, etc. (2) And constructing a neighbor node list according to the collected neighbor information, and recording the neighbors and the spending of each node. (3) removing the first hop neighbor: for each node, the directly connected first-hop neighbors are removed from the neighbor node list. This means that the directly connected first-hop neighbor node is not considered anymore when performing the SPF calculation, thereby achieving the effect of bypassing it. (4) performing an SPF algorithm: for each node, the SPF algorithm is performed using the neighbor list after the first-hop neighbor is removed, the shortest path to all other nodes is calculated, and the Dijkstra algorithm or other similar algorithm is adopted. (5) selecting multipath: after the SPF algorithm is performed, a plurality of paths may be selected from the calculated shortest paths that bypass the directly connected first hop neighbors. This will result in a set of multiple paths that bypass the neighbors.
Acquiring space topology information and flow prediction information by using a time-varying graph;
In a time-varying graph, each point in time can be considered a snapshot of one graph, and the snapshots of multiple points in time combine to form the time-varying graph. The time-varying diagrams mentioned herein may obtain information about network structure, node associations, and traffic variations at each point in time, and may be applied in spatial topology modeling and traffic prediction tasks.
And calculating the next optimal global route information in real time by using the satellite-borne controller.
Optionally, the data routing between the backbone communication satellites of the backbone communication satellites and between the backbone communication satellites and the access node by using the information-centric lightweight routing protocol includes:
S61, the information-centered lightweight routing protocol utilizes a satellite-borne controller to issue a routing update table to the satellite-borne network load to be adjusted according to the routing update condition of each satellite-borne network load;
S62, the satellite-borne network load to be adjusted adjusts corresponding network resources and the routing table according to the received routing adjustment information in the routing update table, and achieves global optimal data routing.
Example two
Referring to fig. 3, fig. 3 is a schematic flow chart of a device for realizing the light weight of a spatial information center network according to an embodiment of the invention. The device for realizing the light weight of the spatial information center network described in fig. 3 is applied to the technical field of satellite communication, and realizes the light weight of the spatial information center network based on inter-satellite terahertz communication. As shown in fig. 3, the spatial information center network lightweight implementation apparatus may include the following operations:
S301, a network construction module is used for constructing a space terahertz communication lightweight information center network, and the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads;
s302, a multi-beam terahertz communication module is used for the backbone communication satellite, and multi-beam terahertz communication is carried out by using a terahertz multi-beam antenna array and one or more other space terahertz communication loads;
s303, a networking module is used for the backbone communication satellites, and networking and network reconstruction of each backbone communication satellite are realized by using an intelligent networking algorithm;
s304, an energy-efficient signal processing module, which is used for the backbone communication satellite to process the terahertz communication signal at high speed and low energy consumption by using an energy-efficient signal processing method;
S305, an access module of the access node is used for the backbone communication satellite to realize access of the access node by utilizing a lightweight robust access protocol;
And S306, a data routing module which is used for carrying out data routing between backbone communication satellites of the backbone communication satellites and between each backbone communication satellite and the access node by using a lightweight routing protocol taking information as a center.
Example III
Referring to fig. 4, fig. 4 is a schematic flow chart of another device for realizing the light weight of the spatial information center network according to an embodiment of the invention. The device for realizing the light weight of the spatial information center network described in fig. 4 is applied to the technical field of satellite communication, and realizes the light weight of the spatial information center network based on inter-satellite terahertz communication. As shown in fig. 4, the spatial information center network lightweight implementation apparatus may include the following operations:
a memory 401 storing executable program codes;
A processor 402 coupled with the memory 401;
the processor 402 invokes executable program codes stored in the memory 401 for performing the steps in the spatial information center network lightweight implementation method described in the first embodiment.
Example five
The embodiment of the invention discloses a computer-readable storage medium storing a computer program for electronic data exchange, wherein the computer program causes a computer to execute the steps in the lightweight implementation of the spatial information center network described in the embodiment one.
The apparatus embodiments described above are merely illustrative, in which the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.
Finally, it should be noted that: the embodiment of the invention discloses a method and a device for realizing the light weight of a spatial information center network, which are disclosed by the embodiment of the invention and are only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (5)
1. A method for implementing light weight of a spatial information center network, the method comprising:
S1, constructing a space terahertz communication lightweight information center network, wherein the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads, and N is an integer;
s2, each backbone communication satellite performs multi-beam terahertz communication with one or more other space terahertz communication loads by using a terahertz multi-beam antenna array, and the method comprises the following steps:
s21, interweaving and arranging a plurality of terahertz antenna subarrays by the backbone communication satellite to obtain a dense and integrated phased array antenna unit array;
s22, generating a terahertz wave beam by utilizing each phased array antenna unit array, and carrying out wave beam large-angle continuous scanning and grating lobe suppression wave beam forming on the generated terahertz wave beam;
S23, combining a plurality of phased array antenna unit arrays at an array spacing greater than half of the working wavelength to obtain a terahertz multi-beam antenna array;
S24, carrying out multi-beam terahertz communication by using the terahertz multi-beam antenna array and other one or more space terahertz communication loads;
s3, each backbone communication satellite realizes networking and network reconstruction of each backbone communication satellite by utilizing an intelligent networking algorithm;
s4, each backbone communication satellite carries out high-speed and low-energy consumption processing on terahertz communication signals by using a high-energy-efficiency signal processing method, and the method comprises the following steps:
S41, after receiving terahertz signals from other backbone satellites or access nodes, the space terahertz communication load carried by the backbone communication satellite down-converts the terahertz signals to an intermediate frequency by utilizing a local oscillator terahertz signal source to obtain a receiving intermediate frequency signal;
S42, the backbone communication satellite performs sparse sampling on the received intermediate frequency signals to obtain undersampled signals of the received intermediate frequency signals;
S43, the backbone communication satellite utilizes a robust sparse reconstruction algorithm to reconstruct the undersampled signals of the received intermediate frequency signals to obtain baseband signals carried by terahertz signals, and high-speed and low-energy consumption processing of the terahertz communication signals is realized;
s5, each backbone communication satellite realizes network access of the access node by utilizing a lightweight robust access protocol;
The lightweight robust access protocol adopts a protocol architecture design of control and service separation;
The control plane is used for receiving and transmitting control messages, and the data plane is used for acquiring higher system capacity by using a high frequency band;
The protocol stack architecture of the lightweight robust access protocol realizes data interaction of protocol layers between protocol stacks in a cross-layer message mode;
The MAC layer of the lightweight robust access protocol improves the high utilization rate of resources in a time slot division mode, and the adopted time slot length can be dynamically adjusted according to the number of network access nodes;
The network access node starts from the Beacon time period after initialization in the life cycle of the network, performs network access through the broadcasting of the Beacon time period, and occupies a transmission time slot through the CAP time period after network access to complete data transmission;
The frame structure of the lightweight robust access protocol comprises a Beacon period frame, an association request frame, an association reply frame, a time slot request frame, a time slot reply frame, an ACK frame, a data frame and a beam forming frame;
S6, data routing is carried out among backbone communication satellites of the backbone communication satellites and among the backbone communication satellites and the access nodes by utilizing a lightweight routing protocol taking information as a center, and the method comprises the following steps:
S61, the information-centered lightweight routing protocol utilizes a satellite-borne controller to issue a routing update table to the satellite-borne network load to be adjusted according to the routing update condition of each satellite-borne network load;
S62, the satellite-borne network load to be adjusted adjusts corresponding network resources and a routing table according to the received routing adjustment information in the routing update table, so as to realize global optimal data routing;
the information-centric lightweight routing protocol adopts an information-centric global dynamic routing design;
The information-centered lightweight routing protocol utilizes a hierarchical naming mode to divide the communication range between satellites;
the LSA content is issued with the assistance of a synchronous application protocol;
Performing multipath transmission by using an SPF algorithm for removing the first-hop neighbors;
acquiring space topology information and flow prediction information by using a time-varying graph;
And calculating the next optimal global route information in real time by using the satellite-borne controller.
2. The method for realizing the light weight of the spatial information center network according to claim 1, wherein in the spatial terahertz communication light weight information center network, backbone communication satellites are networked through inter-satellite terahertz links, and data interaction with NGSO constellations, small satellite clusters and access nodes of other access satellites is realized through inter-satellite terahertz access links.
3. A spatial information center network lightweight implementation device, the device comprising:
the network construction module is used for constructing a space terahertz communication lightweight information center network, wherein the space terahertz communication lightweight information center network comprises N backbone communication satellites carrying space terahertz communication loads, and N is an integer;
the multi-beam terahertz communication module is used for each backbone communication satellite, and performs multi-beam terahertz communication with one or more other space terahertz communication loads by utilizing a terahertz multi-beam antenna array, and comprises:
s21, interweaving and arranging a plurality of terahertz antenna subarrays by the backbone communication satellite to obtain a dense and integrated phased array antenna unit array;
s22, generating a terahertz wave beam by utilizing each phased array antenna unit array, and carrying out wave beam large-angle continuous scanning and grating lobe suppression wave beam forming on the generated terahertz wave beam;
S23, combining a plurality of phased array antenna unit arrays at an array spacing greater than half of the working wavelength to obtain a terahertz multi-beam antenna array;
S24, carrying out multi-beam terahertz communication by using the terahertz multi-beam antenna array and other one or more space terahertz communication loads;
the networking module is used for realizing networking and network reconstruction of each backbone communication satellite by utilizing an intelligent networking algorithm;
the high-energy-efficiency signal processing module is used for each backbone communication satellite, and is used for processing terahertz communication signals at high speed and with low energy consumption by utilizing a high-energy-efficiency signal processing method, and comprises the following steps:
S41, after receiving terahertz signals from other backbone satellites or access nodes, the space terahertz communication load carried by the backbone communication satellite down-converts the terahertz signals to an intermediate frequency by utilizing a local oscillator terahertz signal source to obtain a receiving intermediate frequency signal;
S42, the backbone communication satellite performs sparse sampling on the received intermediate frequency signals to obtain undersampled signals of the received intermediate frequency signals;
S43, the backbone communication satellite utilizes a robust sparse reconstruction algorithm to reconstruct the undersampled signals of the received intermediate frequency signals to obtain baseband signals carried by terahertz signals, and high-speed and low-energy consumption processing of the terahertz communication signals is realized;
The access module of the access node is used for each backbone communication satellite and realizes the access of the access node by utilizing a lightweight robust access protocol;
The lightweight robust access protocol adopts a protocol architecture design of control and service separation;
The control plane is used for receiving and transmitting control messages, and the data plane is used for acquiring higher system capacity by using a high frequency band;
The protocol stack architecture of the lightweight robust access protocol realizes data interaction of protocol layers between protocol stacks in a cross-layer message mode;
The MAC layer of the lightweight robust access protocol improves the high utilization rate of resources in a time slot division mode, and the adopted time slot length can be dynamically adjusted according to the number of network access nodes;
The network access node starts from the Beacon time period after initialization in the life cycle of the network, performs network access through the broadcasting of the Beacon time period, and occupies a transmission time slot through the CAP time period after network access to complete data transmission;
The frame structure of the lightweight robust access protocol comprises a Beacon period frame, an association request frame, an association reply frame, a time slot request frame, a time slot reply frame, an ACK frame, a data frame and a beam forming frame;
The data routing module is used for performing data routing between backbone communication satellites of the backbone communication satellites and between each backbone communication satellite and an access node by using an information-centered lightweight routing protocol, and comprises the following components:
S61, the information-centered lightweight routing protocol utilizes a satellite-borne controller to issue a routing update table to the satellite-borne network load to be adjusted according to the routing update condition of each satellite-borne network load;
S62, the satellite-borne network load to be adjusted adjusts corresponding network resources and a routing table according to the received routing adjustment information in the routing update table, so as to realize global optimal data routing;
the information-centric lightweight routing protocol adopts an information-centric global dynamic routing design;
The information-centered lightweight routing protocol utilizes a hierarchical naming mode to divide the communication range between satellites;
the LSA content is issued with the assistance of a synchronous application protocol;
Performing multipath transmission by using an SPF algorithm for removing the first-hop neighbors;
acquiring space topology information and flow prediction information by using a time-varying graph;
And calculating the next optimal global route information in real time by using the satellite-borne controller.
4. A spatial information center network lightweight implementation device, the device comprising:
a memory storing executable program code;
a processor coupled to the memory;
the processor invokes the executable program code stored in the memory to perform the spatial information center network lightweight implementation method of any one of claims 1-2.
5. A computer-readable storage medium storing computer instructions that, when invoked, perform the spatial information center network weight reduction implementation method according to any one of claims 1-2.
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