CN114629857B - Method, device and system for reserving bandwidth resources in satellite network - Google Patents

Method, device and system for reserving bandwidth resources in satellite network Download PDF

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Publication number
CN114629857B
CN114629857B CN202210278232.8A CN202210278232A CN114629857B CN 114629857 B CN114629857 B CN 114629857B CN 202210278232 A CN202210278232 A CN 202210278232A CN 114629857 B CN114629857 B CN 114629857B
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satellite network
service
resource reservation
data packet
data
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CN114629857A (en
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张然
刘江
刘亮
黄韬
邱路帅
梁冰苑
秦兆涛
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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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/83—Admission control; Resource allocation based on usage prediction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
    • H04L47/724—Admission control; Resource allocation using reservation actions during connection setup at intermediate nodes, e.g. resource reservation protocol [RSVP]
    • 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
    • H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
    • H04B7/18584—Arrangements for data networking, i.e. for data packet routing, for congestion control
    • 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
    • H04B7/18578—Satellite systems for providing broadband data service to individual earth stations
    • H04B7/18597—Arrangements for system physical machines management, i.e. for construction, operations control, administration, maintenance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/302—Route determination based on requested QoS
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/34—Source routing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Computing Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Radio Relay Systems (AREA)

Abstract

The application provides a bandwidth resource reservation method, device and system in a satellite network, wherein the method comprises the following steps: determining a target path of the target service in the satellite network according to the resource reservation parameters corresponding to the target service, the topology data of the satellite network based on the Diff-Serv service model and the preset available bandwidth resource data corresponding to each link; and transmitting the target path to an entry node of the satellite network in the form of a segmented routing SR label stack, so that the entry node receiving the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet in the satellite network preferentially. The method and the system can reserve resources and guarantee the service quality for the service with the resource reservation requirement in the whole network range of the satellite network, and can reserve resources and independently maintain the high-priority service or the service with the resource reservation requirement while frequently carrying out resource reservation configuration is not needed.

Description

Method, device and system for reserving bandwidth resources in satellite network
Technical Field
The present disclosure relates to the field of satellite networks, and in particular, to a method, an apparatus, and a system for reserving bandwidth resources in a satellite network.
Background
Satellite networks often adopt QoS (Quality of Service) to guarantee the service capability of network communication to the network, and Differentiated service (differentiated service model, diff-Serv for short) provides better service in three service models mainly provided by the current QoS. Diff-Serv is a class-based QoS technique, mainly including techniques of traffic classification and marking, congestion management and congestion avoidance, traffic policing, and the like. At the network edge, the network device examines the content of the traffic packets entering the network, and by classifying and marking the packets, the packets are separated into distinct and limited sets of behavior, each set having unique DS encoding point identifiers, and different forwarding policies are adopted in the core network for each packet according to the identifiers, providing differentiated services. Differentiated services do not need to save flow state and signaling information, and have good expandability, but are difficult to provide service guarantee for end-to-end quality based on flows.
At present, the existing Diff-Serv service model divides different service requests into a limited number of service categories, and provides services for the whole aggregated flow in a mode of aggregating service flows with the same characteristics, and does not face to a single service flow any more, and does not maintain the forwarding state of each application program flow or each user any more, so that it is difficult to provide quality assurance for specific service flows, and strict resource reservation and service quality assurance cannot be realized.
Therefore, there is a need to design a way to provide strict resource reservation for services with resource reservation requirements in a mode in which the Diff-Serv differentiated services model handles all traffic flows by class or priority.
Disclosure of Invention
In view of this, embodiments of the present application provide methods, apparatuses, and systems for reserving bandwidth resources in a satellite network, so as to obviate or mitigate one or more disadvantages in the prior art.
One aspect of the present application provides a method for reserving bandwidth resources in a satellite network, which may be performed by a controller, including:
determining a target path of a target service in a satellite network according to a resource reservation parameter corresponding to the target service, topology data of the satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link;
and sending the target path to an entry node of the satellite network in the form of a Segmented Routing (SR) label stack, so that the entry node receiving the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet in the satellite network preferentially.
In some embodiments of the present application, further comprising:
Determining paths in all topology snapshot states in a user access period aiming at each access satellite node corresponding to the target path;
deleting available bandwidths on paths in all topology snapshot states from the available bandwidth resource data;
and if the data packet is processed in the satellite network, releasing the resources occupied by the target path, and recovering the available bandwidth on the paths in all topology snapshot states in the available bandwidth resource data.
In some embodiments of the present application, the topology data is a global topology view; the available bandwidth resource data is an available bandwidth resource view;
correspondingly, the bandwidth resource reservation method in the satellite network further comprises the following steps:
periodically acquiring topology information and link state information of the satellite network according to ephemeris and real-time detection data corresponding to the satellite network;
and updating the connection state of each satellite in the current satellite network through the inter-satellite link and the maximum available bandwidth data of each link based on the topology information and the link state information so as to respectively update the global topology view of the satellite network and the available bandwidth resource view of each link corresponding to each link in a time-division mode.
In some embodiments of the present application, the determining, according to a resource reservation parameter corresponding to a target service, topology data of a satellite network, and preset available bandwidth resource data corresponding to each link, a target path of the target service in the satellite network includes:
receiving a target service processing request for a satellite network based on a Diff-Serv service model;
if the target service processing request is determined to have the resource reservation requirement, acquiring the resource reservation parameter of the target service processing request;
and determining a target path of the target service processing request by a shortest path algorithm according to the resource reservation parameter, a preset global topology view of the satellite network and available bandwidth resource views corresponding to all links.
Another aspect of the present application provides a method of reserving bandwidth resources in a satellite network, which may be performed by an ingress node in the satellite network, comprising:
receiving a target path of a target service sent by a controller in a Segmented Routing (SR) label stack mode, and receiving a data packet of the target service from client equipment, wherein the target path is determined by the controller in advance according to a resource reservation parameter corresponding to the target service, topology data of a satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link;
Marking the data packet of the target service with the highest forwarding priority and adding the data packet into an absolute forwarding queue to be forwarded to an intermediate node in the satellite network by a port;
and limiting the speed of the data packet according to the bandwidth reserved for the target service, and performing label stacking on the data packet so as to push the target path of the data packet to the head of the data packet in a label stack mode.
Another aspect of the present application provides a method of reserving bandwidth resources in a satellite network, which may be performed by an intermediate node in the satellite network, comprising:
receiving a data packet of a target service forwarded by an entry node in a satellite network, and identifying the forwarding priority of the data packet;
and placing the data packet in an absolute forwarding queue of a next hop forwarding port of a corresponding target path according to information carried by the head of the data packet to be forwarded by the port, wherein the target path is determined in advance by a controller according to resource reservation parameters corresponding to the target service, topology data of a satellite network based on a Diff-Serv service model and available bandwidth resource data corresponding to each preset link, and then the controller sends the data packet to the entry node in a form of a segmented routing SR label stack.
Another aspect of the present application provides a bandwidth resource reservation device in a satellite network applied to a controller, including:
the system comprises an available bandwidth resource application module, a service management module and a service management module, wherein the available bandwidth resource application module is used for determining a target path of a target service in a satellite network according to a resource reservation parameter corresponding to the target service, topology data of the satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link;
and the segmented route issuing module is used for sending the target path to an entry node of the satellite network in a segmented route SR label stack mode so that the entry node which receives the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet in the satellite network preferentially.
Another aspect of the present application provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing a method of reserving bandwidth resources in a satellite network that can be executed by a controller, a method of reserving bandwidth resources in a satellite network that can be executed by an ingress node in a satellite network, or a method of reserving bandwidth resources in a satellite network that can be executed by an intermediate node in a satellite network when the computer program is executed.
Another aspect of the present application provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method of reserving bandwidth resources in a satellite network that may be executed by a controller, a method of reserving bandwidth resources in a satellite network that may be executed by an ingress node in a satellite network, or a method of reserving bandwidth resources in a satellite network that may be executed by an intermediate node in a satellite network.
Another aspect of the present application provides a bandwidth resource reservation system in a satellite network, comprising: a controller and each satellite node constituting a satellite network; each of the satellite nodes includes: an ingress node and respective intermediate nodes;
the controller is used for realizing the bandwidth resource reservation method in the satellite network, which can be executed by the controller;
the entry node is configured to implement the aforementioned method for reserving bandwidth resources in a satellite network, which may be performed by the entry node in the satellite network;
the intermediate node is configured to implement the aforementioned method for reserving bandwidth resources in a satellite network, which may be performed by the intermediate node in the satellite network.
According to the bandwidth resource reservation method in the satellite network, which can be executed by the controller, a target path of a target service in the satellite network is determined according to resource reservation parameters corresponding to the target service, topology data of the satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link; transmitting the target path to an entry node of the satellite network in the form of a Segment Routing (SR) label stack, so that the entry node which receives the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet in the satellite network preferentially; depending on a Diff-Serv service model, on the basis of maintaining global bandwidth resource data by a controller, an end-to-end path through which a service passes is designated by a segment route SR (Segment Routing), and the capability of forwarding with highest priority and limiting speed of an entrance is combined, so that whole-network service planning is performed, resource reservation can be performed for the service with resource reservation requirement in the whole-network range of a satellite network, the designated service quality assurance of the service with the resource reservation requirement can be ensured, and resource reservation and independent maintenance can be performed for the service with high priority or the service with the resource reservation requirement while frequent resource reservation configuration is not needed, so that the reliability and stability of service flow processing in the satellite network can be effectively improved.
Additional advantages, objects, and features of the application will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
It will be appreciated by those skilled in the art that the objects and advantages that can be achieved with the present application are not limited to the above-detailed description, and that the above and other objects that can be achieved with the present application will be more clearly understood from the following detailed description.
Drawings
The accompanying drawings are included to provide a further understanding of the application, and are incorporated in and constitute a part of this application. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the application. Corresponding parts in the drawings may be exaggerated, i.e. made larger relative to other parts in an exemplary device actually manufactured according to the present application, for convenience in showing and describing some parts of the present application. In the drawings:
fig. 1 is a general flow chart of a bandwidth resource reservation method in a satellite network executed by a controller according to an embodiment of the present application.
Fig. 2 is a schematic flowchart of a method for reserving bandwidth resources in a satellite network, which is executed by a controller according to an embodiment of the present application.
Fig. 3 is a specific flowchart of a method for reserving bandwidth resources in a satellite network performed by an entry node according to an embodiment of the present application.
Fig. 4 is a specific flowchart of a method for reserving bandwidth resources in a satellite network performed by an intermediate node according to an embodiment of the present application.
Fig. 5 is a schematic structural diagram of a bandwidth resource reservation device in a satellite network according to another embodiment of the present application.
Fig. 6 is a system architecture diagram of a bandwidth resource reservation method in a satellite network according to an application example of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail with reference to the embodiments and the accompanying drawings. The exemplary embodiments of the present application and their descriptions are used herein to explain the present application, but are not intended to be limiting of the present application.
It should be noted here that, in order to avoid obscuring the present application due to unnecessary details, only structures and/or processing steps closely related to the solution according to the present application are shown in the drawings, while other details not greatly related to the present application are omitted.
It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, elements, steps or components, but does not preclude the presence or addition of one or more other features, elements, steps or components.
It is also noted herein that the term "coupled" may refer to not only a direct connection, but also an indirect connection in which an intermediate is present, unless otherwise specified.
Hereinafter, embodiments of the present application will be described with reference to the drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.
With the rapid development of internet applications, the early "best effort" mode of operation of the internet has failed to meet the needs of people, and network communications put higher demands on the service capabilities of the network, so that QoS concepts and related technologies have emerged. QoS (Quality of Service) is a short for service quality, which refers to a technique that a network provides better service capability for a specified network communication by using various basic techniques, and is used for reducing network delay and solving congestion.
The current QoS mainly provides three service models, namely Best-Effort service model, integrated service (integrated service model, referred to as Int-Serv) and Differentiated service (differentiated service model, referred to as Diff-Serv). Best-effect is the default service type of the Internet, and an application can send any number of messages at any time, and the network uses a first-in first-out (FIFO) queue to send the messages as much as possible, and does not provide any guarantee for performances such as bandwidth, delay, reliability, etc., so that Best-Effort service does not substantially belong to QoS category.
Int-Serv is a comprehensive service model, and can provide two services of guaranteed service and load control, and the guaranteed service provides guaranteed bandwidth and time delay; the load control service ensures that similar services as those without overload can be provided in case of network overload. The model adopts resource reservation protocol (RSVP), an application program needing QoS service firstly informs the network of own flow parameters and service quality requirements, so that a routing node between a source end and a destination end reserves corresponding resources for the application program, and after confirming that the network reserves the resources for a message of the application program, the application can send the message. The mode reserves the resources on the path in advance for each network service flow, provides fine-grained service quality distinction for the network, but when the number of application flows in the network is excessive and the network data flow is excessive, the network equipment bears huge storage and processing pressure, and is difficult to realize the QoS service for each flow.
Diff-Serv is a multi-service model, unlike Int-Serv, diff-Serv does not need RSVP signaling, and is a class-based QoS technology, mainly comprising technologies such as traffic classification and marking, congestion management and congestion avoidance, traffic supervision, and the like. At the network edge, the network device examines the content of the traffic packets entering the network, and by classifying and marking the packets, the packets are separated into distinct and limited sets of behavior, each set having unique DS encoding point identifiers, and different forwarding policies are adopted in the core network for each packet according to the identifiers, providing differentiated services. Differentiated services do not need to save flow state and signaling information, and have better scalability than Int-Serv, but it is difficult to provide service guarantees for flow-based end-to-end quality.
The specific techniques of QoS mainly include traffic classification and marking, congestion management, congestion avoidance, traffic supervision, traffic shaping, etc. The flow classification and marking generally divides the flow into a plurality of priority classes or service classes according to the CoS domain of the Ethernet frame, the first three bits of the ToS domain of the IP header, the first six bits of the DSCP domain and the EXP domain of the MPLS, so that a system or equipment for processing the message can process the message according to convention; the congestion management technology is to use a queue technology to manage and control when congestion occurs, put the messages sent from the same port into a plurality of queues to wait, send the messages according to the priority of the queues, and the common queue technology has FIFO, PQ, CQ, WFQ, CBQ, RTP priority queues and the like; congestion avoidance is a technique for avoiding the global synchronization of TCP due to the fact that messages are discarded after a queue exceeds a specified length, and the messages can be discarded randomly before congestion occurs by weighted random early detection WRED; the traffic policing CAR and the traffic shaping GTS technology control the traffic through the token bucket technology.
The existing Diff-Serv service model divides different service requests into a limited number of service categories, and provides services for the whole aggregated flow in a mode of aggregating service flows with the same characteristics, and does not face to single service flow any more, and does not maintain the forwarding state of each application program flow or each user any more, so that quality assurance is difficult to provide for specific service flows, and strict resource reservation and service quality assurance cannot be realized.
The existing Int-Serv service model can independently maintain the forwarding state of each service flow or user, but when the number of data flows is large, the equipment faces huge storage and processing pressure, and the expandability is poor; in addition, since the satellites move at high speed in the satellite network, the topology changes dynamically, and the relative positions between the satellites change continuously, so that the routes of the satellite network change continuously, if the Int-Serv service model is still adopted to provide the QoS service, the frequent use of the RSVP signaling to carry out global resource reservation configuration is caused, and the configuration cost is excessive, therefore, the RSVP technology is not suitable for providing the quality assurance service in the satellite network with high dynamic property.
In order to provide strict resource reservation for the service with resource reservation requirements under the mode that a Diff-Serv differentiated service model processes all service flows according to classes or priorities, the invention provides a resource reservation method based on segmented routing and global entry speed limit on the basis of the Diff-Serv service model, which ensures that the service with resource reservation requirements can obtain appointed service quality assurance, and realizes that resource reservation and independent maintenance can be carried out on high-priority service or service requiring resource reservation without frequently carrying out resource reservation configuration.
Based on this, the embodiment of the present application provides a method for reserving bandwidth resources in a satellite network, which may be executed by a controller, referring to fig. 1, where the method for reserving bandwidth resources in a satellite network may be executed by a controller specifically includes the following contents:
step 100: and determining a target path of the target service in the satellite network according to the resource reservation parameters corresponding to the target service, the topology data of the satellite network based on the Diff-Serv service model and the preset available bandwidth resource data corresponding to each link.
In step 100, the resource reservation parameters may include a start point and an end point of an end-to-end resource reservation, two parameters of a required bandwidth, and so on.
Step 200: and sending the target path to an entry node of the satellite network in the form of a Segmented Routing (SR) label stack, so that the entry node receiving the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet in the satellite network preferentially.
It can be understood that when the control plane issues the paths to the data plane nodes, the control plane issues the paths to access satellites of the user for a period of time in the future, and calculates the paths in all topology snapshot states in the user access period for each access satellite.
As can be seen from the foregoing description, the bandwidth resource reservation method in the satellite network, which can be executed by the controller, relies on the Diff-Serv service model, and on the basis that the controller maintains global bandwidth resource data, performs whole network service planning by designating an end-to-end path through which a service passes through by the segment route SR (Segment Routing) and combining the capability of forwarding with the highest priority and limiting the speed of an entry, so as to perform resource reservation for the service with the resource reservation requirement in the whole network range of the satellite network, ensure that the service with the resource reservation requirement obtains the designated service quality, and perform resource reservation and independent maintenance for the service with the high priority or the service with the resource reservation requirement while needing frequent resource reservation configuration, thereby effectively improving the reliability and stability of service flow processing in the satellite network.
In order to effectively improve the operational reliability and stability of the bandwidth resource reservation procedure in the satellite network, in the bandwidth resource reservation method in the satellite network provided by the embodiment of the present application, referring to fig. 2, after step 200 in the bandwidth resource reservation method in the satellite network, which may be executed by the controller, the method specifically includes the following contents:
Step 300: and determining paths in all topology snapshot states in the user access period aiming at each access satellite node corresponding to the target path.
Step 400: and deleting the available bandwidth on the paths in all topology snapshot states from the available bandwidth resource data.
Step 500: and if the data packet is processed in the satellite network, releasing the resources occupied by the target path, and recovering the available bandwidth on the paths in all topology snapshot states in the available bandwidth resource data.
It will be appreciated that after the path is down, the controller may deduct the available bandwidth on the path allocated by the resource reservation service from the global available bandwidth view. Note that this process, bandwidth deduction is time-sliced, i.e. only the time period during which traffic passes through a specified path, the corresponding bandwidth is deducted from the bandwidth view.
When the resource reservation service is finished, the control plane releases the related resource occupation, and the bandwidth deducted by the service is restored in the view of the available resources.
As can be seen from the above description, the bandwidth resource reservation method in the satellite network, which can be executed by the controller, provided by the embodiment of the present application, can effectively improve the operational reliability and stability of the bandwidth resource reservation process in the satellite network by updating the global view in time and releasing the service in time after the service flow processing is finished, and further can further improve the reliability and effectiveness of the service flow processing in the satellite network.
In order to improve reliability, convenience and efficiency of determining a target path of the target service in the satellite network according to topology information and available bandwidth resource data, in the bandwidth resource reservation method in the satellite network, which can be executed by a controller, provided by the embodiment of the application, the topology data is a global topology view; the available bandwidth resource data is an available bandwidth resource view; referring to fig. 2, before step 100 in the bandwidth resource reservation method in the satellite network, the method may be executed by the controller, the following is specifically included:
step 010: and periodically acquiring topology information and link state information of the satellite network according to ephemeris and real-time detection data corresponding to the satellite network.
Step 020: and updating the connection state of each satellite in the current satellite network through the inter-satellite link and the maximum available bandwidth data of each link based on the topology information and the link state information so as to respectively update the global topology view of the satellite network and the available bandwidth resource view of each link corresponding to each link in a time-division mode.
It is understood that the controller of the satellite network collects topology information and link state information of the entire satellite network through ephemeris and real-time detection. A view of the connection status of satellites in the current network through inter-satellite links and the maximum available bandwidth for each link is maintained. And acquiring an available bandwidth view of the whole network through the resource allocation condition maintained locally by the control plane.
Wherein the view of available bandwidth resources is slotted.
As can be seen from the foregoing description, according to the bandwidth resource reservation method in the satellite network, which may be executed by the controller and provided in the embodiments of the present application, by updating the connection state of each satellite in the current satellite network through an inter-satellite link and the maximum available bandwidth data of each link based on the topology information and the link state information, so as to update the global topology view of the satellite network and the available bandwidth resource view of each link corresponding to each time interval, the reliability, convenience and efficiency of determining the target path of the target service in the satellite network according to the topology information and the available bandwidth resource data can be effectively improved, and further the efficiency and reliability of the bandwidth resource reservation process in the satellite network can be further improved.
In order to further improve the efficiency and the rationality of the planning of the service flow processing procedure in the satellite network, in the method for reserving bandwidth resources in the satellite network, which can be executed by the controller, referring to fig. 2, step 100 in the method for reserving bandwidth resources in the satellite network, which can be executed by the controller, specifically includes the following contents:
Step 110: a target traffic handling request is received for a satellite network based on a Diff-Serv service model.
Step 120: and if the target service processing request is determined to have the resource reservation requirement, acquiring the resource reservation parameter of the target service processing request.
Step 130: and determining a target path of the target service processing request by a shortest path algorithm according to the resource reservation parameter, a preset global topology view of the satellite network and available bandwidth resource views corresponding to all links.
It can be understood that when there is a new service with a resource reservation requirement, the control plane is informed of two parameters of the starting point and the ending point of the end-to-end resource reservation and the required bandwidth through the service plane.
And under the global topology view and the available resource view, combining with the end-to-end resource reservation requirement of the service, and calculating an end-to-end path of the residual bandwidth resource under the current topology, which can meet the bandwidth reservation requirement, by utilizing a shortest path algorithm or other path calculation algorithms. And if the path meeting the bandwidth requirement can be found, allowing the resource reservation service to access, and if the path meeting the bandwidth reservation requirement can not be found by the residual bandwidth, rejecting the resource reservation request of the service.
As can be seen from the above description, the bandwidth resource reservation method in the satellite network, which can be executed by the controller, provided by the embodiment of the present application, determines the target path of the target service processing request by adopting the shortest path algorithm, so that the efficiency and the planning rationality of the service flow processing process in the satellite network can be further improved on the basis of ensuring that the service with the resource reservation requirement is ensured to obtain the specified service quality.
The embodiment of the present application further provides a method for reserving bandwidth resources in a satellite network, which may be executed by an ingress node in the satellite network, referring to fig. 3, where the method for reserving bandwidth resources in a satellite network, which may be executed by the ingress node, specifically includes the following contents:
step 610: and receiving a target path of a target service sent by a controller in a segmented routing SR label stack mode, and receiving a data packet of the target service from client equipment, wherein the target path is determined by the controller in advance according to a resource reservation parameter corresponding to the target service, topology data of a satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link.
Step 620: and marking the data packet of the target service with the highest forwarding priority and adding the data packet into an absolute forwarding queue to be forwarded to an intermediate node in the satellite network by a port.
Step 630: and limiting the speed of the data packet according to the bandwidth reserved for the target service, and performing label stacking on the data packet so as to push the target path of the data packet to the head of the data packet in a label stack mode.
It will be appreciated that step 610 is performed after step 200.
As can be seen from the foregoing description, the bandwidth resource reservation method in a satellite network, which can be executed by an ingress node in the satellite network, relies on a Diff-Serv service model, specifies an end-to-end path through which a service passes by a segment route SR on the basis of maintaining global bandwidth resource data by a controller, and performs full-network service planning by combining the capability of forwarding with the highest priority and limiting the ingress with an intermediate node, so that resource reservation can be performed for the service with a resource reservation requirement in the full-network range of the satellite network, the service with the resource reservation requirement can be ensured to obtain specified service quality assurance, and resource reservation and independent maintenance can be performed for the service with the high priority or the service with the resource reservation requirement while frequent resource reservation configuration is not required, thereby effectively improving the reliability and stability of service flow processing in the satellite network.
The embodiment of the present application further provides a method for reserving bandwidth resources in a satellite network, which may be executed by an intermediate node in the satellite network, referring to fig. 4, where the method for reserving bandwidth resources in a satellite network, which may be executed by the intermediate node, specifically includes the following contents:
step 710: and receiving the data packet of the target service forwarded by the entry node in the satellite network, and identifying the forwarding priority of the data packet.
Step 720: and placing the data packet in an absolute forwarding queue of a next hop forwarding port of a corresponding target path according to information carried by the head of the data packet to be forwarded by the port, wherein the target path is determined in advance by a controller according to resource reservation parameters corresponding to the target service, topology data of a satellite network based on a Diff-Serv service model and available bandwidth resource data corresponding to each preset link, and then the controller sends the data packet to the entry node in a form of a segmented routing SR label stack.
It is understood that step 710 is performed after step 630.
As can be seen from the foregoing description, the bandwidth resource reservation method in a satellite network, which can be executed by an intermediate node in the satellite network, relies on a Diff-Serv service model, specifies an end-to-end path through which a service passes by a segment route SR (Segment Routing) on the basis of maintaining global bandwidth resource data by a controller, and performs whole-network service planning by combining the capability of forwarding with a highest priority and limiting an entry with the intermediate node, so that resource reservation can be performed for the service with a resource reservation requirement in the whole-network range of the satellite network, specified service quality guarantee can be ensured for the service with the resource reservation requirement, and resource reservation and independent maintenance can be performed for the service with a high priority or the service with the resource reservation requirement while frequent resource reservation configuration is not required, thereby effectively improving reliability and stability of service flow processing in the satellite network.
In view of the software aspect, the present application further provides a bandwidth resource reservation device in a satellite network for executing all or part of the foregoing bandwidth resource reservation method in the satellite network that can be controlled by the controller, and referring to fig. 5, the bandwidth resource reservation device in the satellite network specifically includes the following contents:
the available bandwidth resource application module 10 is configured to determine a target path of a target service in a satellite network according to a resource reservation parameter corresponding to the target service, topology data of the satellite network based on a Diff-Serv service model, and preset available bandwidth resource data corresponding to each link.
The segment route issuing module 20 is configured to send the target path to an ingress node of the satellite network in a form of a segment route SR label stack, so that the ingress node that receives the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet preferentially in the satellite network.
The embodiment of the bandwidth resource reservation device in the satellite network provided in the present application may be specifically used to execute the processing flow of the embodiment of the bandwidth resource reservation method in the satellite network that may be controlled by the controller in the above embodiment, and the functions thereof are not described herein in detail, and reference may be made to the detailed description of the embodiment of the bandwidth resource reservation method in the satellite network that may be controlled by the controller. In addition, the bandwidth resource reservation means in the satellite network may be used to perform the functions of the intermediate node or the ingress node described above.
The part of the bandwidth resource reservation device in the satellite network for reserving the bandwidth resource in the satellite network can be executed in a server, and in another practical application situation, all operations can be completed in the client device. Specifically, the selection may be made according to the processing capability of the client device, and restrictions of the use scenario of the user. The present application is not limited in this regard. If all operations are performed in the client device, the client device may further comprise a processor for specific handling of bandwidth resource reservation in the satellite network.
The client device may have a communication module (i.e. a communication unit) and may be connected to a remote server in a communication manner, so as to implement data transmission with the server. The server may include a server on the side of the task scheduling center, and in other implementations may include a server of an intermediate platform, such as a server of a third party server platform having a communication link with the task scheduling center server. The server may include a single computer device, a server cluster formed by a plurality of servers, or a server structure of a distributed device.
Any suitable network protocol may be used for communication between the server and the client device, including those not yet developed at the filing date of this application. The network protocols may include, for example, TCP/IP protocol, UDP/IP protocol, HTTP protocol, HTTPS protocol, etc. Of course, the network protocol may also include, for example, RPC protocol (Remote Procedure Call Protocol ), REST protocol (Representational State Transfer, representational state transfer protocol), etc. used above the above-described protocol.
As can be seen from the above description, the bandwidth resource reservation device in the satellite network provided in the embodiments of the present application relies on the Diff-Serv service model, and performs full-network service planning by combining the capability of forwarding with the highest priority and limiting the speed of the entrance through the end-to-end path through which the service is specified by the segment routing SR on the basis that the controller maintains the global bandwidth resource data, so that the service with the resource reservation requirement can be reserved in the full-network range of the satellite network, the specified service quality can be ensured, the resource reservation configuration is not required frequently, and the resource reservation and the independent maintenance can be performed on the service with the high priority or the service requiring the resource reservation, thereby effectively improving the reliability and stability of the service flow processing in the satellite network.
Based on the above embodiments, the present application further provides a bandwidth resource reservation system in a satellite network, which specifically includes the following contents:
a controller and each satellite node constituting a satellite network; each of the satellite nodes includes: an ingress node and respective intermediate nodes.
The controller is configured to implement the bandwidth resource reservation method in the satellite network shown in fig. 1 or fig. 2.
The entry node is configured to implement the bandwidth resource reservation method in the satellite network shown in fig. 3.
The intermediate node is configured to implement the bandwidth resource reservation method in the satellite network shown in fig. 4.
In order to further explain the scheme, the application also provides a specific application example of the bandwidth resource reservation method in the satellite network. Depending on a Diff-Serv service model, on the basis that a controller maintains a global bandwidth resource view, an end-to-end path through which a service passes is specified through Segment Routing (SR), and the full-network service planning is performed by combining the capability of forwarding with the highest priority and limiting the speed of an entrance, so that resource reservation for the specific service in the full-network range of the satellite network is realized.
The main steps of resource reservation are divided into a control plane and a data plane side. On the control plane side, the processing flow comprises global view acquisition and maintenance, service resource reservation request arrival, path planning and admission control, path issuing, global view updating and the like. On the data plane side, the processing flow includes priority mapping, bandwidth speed limiting, label stacking, intermediate node processing and the like. Referring to fig. 6, the method for reserving bandwidth resources in the satellite network specifically includes the following:
Control surface (one)
1. Global view acquisition and maintenance
The controller of the satellite network collects topology information and link state information of the whole satellite network through ephemeris and real-time detection. A view of the connection status of satellites in the current network through inter-satellite links and the maximum available bandwidth for each link is maintained. And acquiring an available bandwidth view of the whole network through the resource allocation condition maintained locally by the control plane.
Note that the view of available bandwidth resources is time-slotted, with the format shown in table 1.
TABLE 1
2. Requesting reservation of resources after service arrival
When new service has resource reservation requirement, the control plane is informed of the starting point and the ending point of the end-to-end resource reservation and the two parameters of the required bandwidth through the service plane.
3. Path planning and admission control
And under the global topology view and the available resource view, combining with the end-to-end resource reservation requirement of the service, and calculating an end-to-end path of the residual bandwidth resource under the current topology, which can meet the bandwidth reservation requirement, by utilizing a shortest path algorithm or other path calculation algorithms. And if the path meeting the bandwidth requirement can be found, allowing the resource reservation service to access, and if the path meeting the bandwidth reservation requirement can not be found by the residual bandwidth, rejecting the resource reservation request of the service.
4. Path issuing
The control plane issues the calculated end-to-end path to the ingress node of the data plane traffic in the form of a segment routing SR label stack. When the control plane issues paths to the data plane nodes, the control plane issues the paths to access satellites of users in a future period respectively, and calculates the paths in all topology snapshot states in the user access period for each access satellite.
5. Global view update
After the path is issued, the controller deducts the available bandwidth on the path allocated by the resource reservation service from the global available bandwidth view. Note that this process, bandwidth deduction is time-sliced, i.e. only the time period during which traffic passes through a specified path, the corresponding bandwidth is deducted from the bandwidth view.
6. Service release
When the resource reservation service is finished, the control plane releases the related resource occupation, and the bandwidth deducted by the service is restored in the view of the available resources.
The above is the processing logic of the control plane, and for the processing logic of the data plane, the following is specifically described:
(II) data plane
1. Priority mapping
The data plane maintains several queues per port per satellite node. One of the queues uses absolute forwarding priority, called absolute forwarding queue. That is, whenever a packet is queued in this queue, the port will forward the packet in the queue preferentially, and the port will not forward packets in other queues further until all packets in the queue are successfully forwarded.
When the data plane satellite node equipment arrives, the satellite node equipment marks the highest forwarding priority on the data packet with the bandwidth reservation requirement, and then places the data packet in an absolute forwarding queue for the port to forward.
2. Bandwidth speed limit
When a specific service flow is sent from a user terminal to an access satellite node, the node limits the speed of the accessed service flow, and the value of the speed limit is the bandwidth reserved by the service.
3. Label push and packet forwarding
The data plane satellite node performs label stacking on the service data packet, and pushes the path to be passed by the data packet to the head of the data packet in the form of label stack, as shown in fig. 6.
4. Intermediate node processing
When a data packet of a service is forwarded to an intermediate node through a service entry node, the intermediate node identifies the priority of the data packet, and after identifying the priority as the highest forwarding priority, the data packet is placed in an absolute forwarding queue of a next hop forwarding port by combining label information carried by the head of the data packet.
Through the steps, the resource reservation in the satellite network bearing network can be completed.
Of particular note are:
each service has access priority. The access priority refers to sequential priority of resource reservation requests accessed by the network when there are a plurality of resource reservation requests at the network entry at the same time. When each link bandwidth of the calculated path fails to meet the service request resource, the controller judges the access priority of the service and processes the service. The access priority of the service is agreed with the operator in advance before the service is operated. New traffic with high access priority may push the transmission bandwidth of low access priority traffic. There are already many services in the network, and when bandwidth resources are not occupied enough to provide resource reservation for a new service, the access priority of the new service and the service being transmitted needs to be compared.
In summary, the above method provided by the application example of the present application provides a resource reservation method combining SR and differentiated services in a satellite network; the queue scheduling method for absolute forwarding of the highest priority in the differentiated service model is provided; the method for realizing global bandwidth resource planning by SR explicit path planning is provided for carrying out bandwidth speed limit on the service with the highest priority in the differentiated service model; the resource reservation scheme based on the SR can realize the efficient and simple configuration under the dynamic environment of the satellite network; providing a flow mode of maintaining and updating a global resource view by a controller in a satellite SR network, and providing a calculation basis for resource reservation service; the combined working mode of the access priority and the forwarding priority is designed, and a further resource reservation scheme can be provided on the basis of providing the resource reservation service. The innovation of the method is that a Diff-Serv differentiated service model is adopted to realize resource reservation. Priority forwarding is set for the traffic. The service with resource reservation requirements in the aspects of bandwidth and the like can be set as absolute forwarding priority, the speed of the entrance of the service is limited, and the resource reservation under Diff-Serv can be realized by combining the display path planning and the global resource view brought by SR. In addition, for the access point with frequent change of the satellite network, the SR mechanism is adopted without a great deal of reconfiguration, and the SR mechanism is only needed to be configured at the service entrance, thereby avoiding a great deal of reconfiguration overhead.
The embodiment of the application further provides a computer device (i.e. an electronic device), where the computer device may include a processor, a memory, a receiver, and a transmitter, where the processor is configured to execute the method for reserving bandwidth resources in a satellite network executed by any of the execution bodies mentioned in the foregoing embodiment, where the processor and the memory may be connected by a bus or other manners, and an example is that the processor and the memory are connected by a bus. The receiver may be connected to the processor, memory, by wire or wirelessly. The computer equipment is in communication connection with the bandwidth resource reservation device in the satellite network so as to receive real-time motion data from a sensor in the wireless multimedia sensor network and receive an original video sequence from the video acquisition device.
The processor may be a central processing unit (Central Processing Unit, CPU). The processor may also be any other general purpose processor, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof.
The memory, as a non-transitory computer readable storage medium, may be configured to store a non-transitory software program, a non-transitory computer executable program, and a module, such as program instructions/modules corresponding to a bandwidth resource reservation method in a satellite network executed by any execution body in an embodiment of the present application. The processor executes the non-transitory software programs, instructions and modules stored in the memory to perform various functional applications and data processing of the processor, i.e., implement the bandwidth resource reservation method in the satellite network in the above-described method embodiments.
The memory may include a memory program area and a memory data area, wherein the memory program area may store an operating system, at least one application program required for a function; the storage data area may store data created by the processor, etc. In addition, the memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory may optionally include memory located remotely from the processor, the remote memory being connectable to the processor through a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The one or more modules are stored in the memory that, when executed by the processor, perform the method of reserving bandwidth resources in a satellite network performed by any of the execution bodies in the embodiments.
In some embodiments of the present application, the user equipment may include a processor, a memory, and a transceiver unit, where the transceiver unit may include a receiver and a transmitter, and the processor, the memory, the receiver, and the transmitter may be connected by a bus system, the memory storing computer instructions, and the processor executing the computer instructions stored in the memory to control the transceiver unit to transmit and receive signals.
As an implementation manner, the functions of the receiver and the transmitter in the present application may be considered to be implemented by a transceiver circuit or a dedicated chip for transceiver, and the processor may be considered to be implemented by a dedicated processing chip, a processing circuit or a general-purpose chip.
As another implementation manner, a manner of using a general-purpose computer may be considered to implement the server provided in the embodiments of the present application. I.e. program code for implementing the functions of the processor, the receiver and the transmitter are stored in the memory, and the general purpose processor implements the functions of the processor, the receiver and the transmitter by executing the code in the memory.
The embodiments of the present application also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the bandwidth resource reservation method in a satellite network performed by any of the foregoing execution bodies. The computer readable storage medium may be a tangible storage medium such as Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, floppy disks, hard disk, a removable memory disk, a CD-ROM, or any other form of storage medium known in the art.
Those of ordinary skill in the art will appreciate that the various illustrative components, systems, and methods described in connection with the embodiments disclosed herein can be implemented as hardware, software, or a combination of both. The particular implementation is hardware or software dependent on the specific application of the solution and the design constraints. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the present application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave.
It should be clear that the present application is not limited to the particular arrangements and processes described above and illustrated in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions, or change the order between steps, after appreciating the spirit of the present application.
The features described and/or illustrated in this application for one embodiment may be used in the same way or in a similar way in one or more other embodiments and/or in combination with or instead of the features of the other embodiments.
The foregoing description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the embodiment of the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A method for reserving bandwidth resources in a satellite network, comprising:
determining a target path of a target service in a satellite network according to a resource reservation parameter corresponding to the target service, topology data of the satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link;
and sending the target path to an entry node of the satellite network in the form of a Segmented Routing (SR) label stack, so that the entry node receiving the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet in the satellite network preferentially.
2. The method for reserving bandwidth resources in a satellite network according to claim 1, further comprising:
determining paths in all topology snapshot states in a user access period aiming at each access satellite node corresponding to the target path;
deleting available bandwidths on paths in all topology snapshot states from the available bandwidth resource data;
and if the data packet is processed in the satellite network, releasing the resources occupied by the target path, and recovering the available bandwidth on the paths in all topology snapshot states in the available bandwidth resource data.
3. The method for reserving bandwidth resources in a satellite network according to claim 1, wherein the topology data is a global topology view; the available bandwidth resource data is an available bandwidth resource view;
correspondingly, the bandwidth resource reservation method in the satellite network further comprises the following steps:
periodically acquiring topology information and link state information of the satellite network according to ephemeris and real-time detection data corresponding to the satellite network;
and updating the connection state of each satellite in the current satellite network through the inter-satellite link and the maximum available bandwidth data of each link based on the topology information and the link state information so as to respectively update the global topology view of the satellite network and the available bandwidth resource view of each link corresponding to each link in a time-division mode.
4. The method for reserving bandwidth resources in a satellite network according to claim 3, wherein determining a target path of the target service in the satellite network according to the resource reservation parameter corresponding to the target service, topology data of the satellite network, and preset available bandwidth resource data corresponding to each link comprises:
receiving a target service processing request for a satellite network based on a Diff-Serv service model;
If the target service processing request is determined to have the resource reservation requirement, acquiring the resource reservation parameter of the target service processing request;
and determining a target path of the target service processing request by a shortest path algorithm according to the resource reservation parameter, a preset global topology view of the satellite network and available bandwidth resource views corresponding to all links.
5. A method for reserving bandwidth resources in a satellite network, comprising:
receiving a target path of a target service sent by a controller in a Segmented Routing (SR) label stack mode, and receiving a data packet of the target service from client equipment, wherein the target path is determined by the controller in advance according to a resource reservation parameter corresponding to the target service, topology data of a satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link;
marking the data packet of the target service with the highest forwarding priority and adding the data packet into an absolute forwarding queue to be forwarded to an intermediate node in the satellite network by a port;
and limiting the speed of the data packet according to the bandwidth reserved for the target service, and performing label stacking on the data packet so as to push the target path of the data packet to the head of the data packet in a label stack mode.
6. A method for reserving bandwidth resources in a satellite network, comprising:
receiving a data packet of a target service forwarded by an entry node in a satellite network, and identifying the forwarding priority of the data packet;
and placing the data packet in an absolute forwarding queue of a next hop forwarding port of a corresponding target path according to information carried by the head of the data packet to be forwarded by the port, wherein the target path is determined in advance by a controller according to resource reservation parameters corresponding to the target service, topology data of a satellite network based on a Diff-Serv service model and available bandwidth resource data corresponding to each preset link, and then the controller sends the data packet to the entry node in a form of a segmented routing SR label stack.
7. A bandwidth resource reservation apparatus in a satellite network, comprising:
the system comprises an available bandwidth resource application module, a service management module and a service management module, wherein the available bandwidth resource application module is used for determining a target path of a target service in a satellite network according to a resource reservation parameter corresponding to the target service, topology data of the satellite network based on a Diff-Serv service model and preset available bandwidth resource data corresponding to each link;
and the segmented route issuing module is used for sending the target path to an entry node of the satellite network in a segmented route SR label stack mode so that the entry node which receives the data packet of the target service limits the speed of the data packet according to the bandwidth reserved for the target service and forwards the data packet in the satellite network preferentially.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method for reserving bandwidth resources in a satellite network according to any one of claims 1 to 4, the method for reserving bandwidth resources in a satellite network according to claim 5 or the method for reserving bandwidth resources in a satellite network according to claim 6 when executing the computer program.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method for reserving bandwidth resources in a satellite network according to any one of claims 1 to 4, the method for reserving bandwidth resources in a satellite network according to claim 5, or the method for reserving bandwidth resources in a satellite network according to claim 6.
10. A bandwidth resource reservation system in a satellite network, comprising: a controller and each satellite node constituting a satellite network; each of the satellite nodes includes: an ingress node and respective intermediate nodes;
the controller is configured to implement the bandwidth resource reservation method in the satellite network according to any one of claims 1 to 4;
The entry node is configured to implement the method for reserving bandwidth resources in a satellite network according to claim 5;
the intermediate node is configured to implement the bandwidth resource reservation method in a satellite network according to claim 6.
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