CN113766537A - Satellite network resource adaptation method and system for user customization - Google Patents
Satellite network resource adaptation method and system for user customization Download PDFInfo
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- CN113766537A CN113766537A CN202110924544.7A CN202110924544A CN113766537A CN 113766537 A CN113766537 A CN 113766537A CN 202110924544 A CN202110924544 A CN 202110924544A CN 113766537 A CN113766537 A CN 113766537A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0289—Congestion control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/06—Airborne or Satellite Networks
Abstract
The invention discloses a satellite network resource adaptation method and a satellite network resource adaptation system customized for users, which are characterized in that multiple resource adaptations are provided based on real-time link information according to the special scene customization requirements of the users, so that the satellite network system can provide corresponding optimal route forwarding service for the users, and the resource selectivity of the users is increased.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a satellite network resource adaptation method and system for user customization.
Background
The satellite network is an important spatial information infrastructure and plays a key role in realizing global coverage, air-sea-sky cross-domain and multi-system access full-time communication in the future in China. The diversity of users and services determines that the satellite network needs to meet various network communication resource requirements of users for time delay, bandwidth, packet loss rate and the like.
The mainstream idea in the industry at present is to implement network resource adaptation through a routing technology supporting quality of service guarantee. Relatively sophisticated solutions exist for terrestrial networks, such as the IntServ model and DiffServ model for IP networks. In the field of satellite networks, much research on routing technology focuses on solving the problem of satellite network topology dynamics, and the research on network resource adaptation is less, so how to implement effective utilization of satellite network resources based on network resource adaptation becomes a problem to be solved urgently.
Disclosure of Invention
The invention provides a user-customized satellite network resource adaptation method and a user-customized satellite network resource adaptation system, which are used for solving the problem that in the prior art, the satellite network resource allocation cannot be better realized by network resource adaptation at a user side.
In a first aspect, the present invention provides a method for adapting a satellite network resource customized for a user, the method comprising: receiving a request sent by a user terminal through a communication network, wherein the communication network comprises a satellite network and a ground network, the satellite network comprises mutually connected satellite nodes, and the ground network comprises a ground node, a network management center and a control center which are sequentially connected; based on the communication network, dynamically allocating network resources according to the request of the user terminal, and calculating a real-time route based on the link state, so that the allocated resources of the communication network are adapted to the current request of the user terminal, thereby reducing the network congestion probability; the request comprises the service type, the reservation time and the communication resource requirement of the request, and the communication resource requirement comprises a time delay type, a packet loss rate type and a bandwidth type.
Further, a request of a user terminal is received through the ground node, and the ground node sends the request to the control center through the network management center, so that the control center performs routing calculation based on the request.
Further, the control center is a centralized network controller, and is configured to perform registration and network access of the user terminal, and perform centralized routing calculation based on a request of the user terminal.
Further, the control center calculates a real-time route based on a preset global mapping table according to a request of the user terminal;
the global mapping table stores mapping relationships between user terminal identifiers and node identifiers, wherein the user terminal identifiers are used for uniquely identifying user terminals, and the node identifiers are used for uniquely identifying satellite nodes and ground nodes, that is, the global mapping table stores mapping relationships of all nodes in a network and network resource conditions of all nodes.
Further, the method further comprises: local mapping tables corresponding to the satellite nodes and the ground nodes are respectively arranged on the satellite nodes and the ground nodes; all nodes connected with the satellite node or the ground node and the conditions of the user terminal are stored in the local mapping table, and the corresponding mapping relations between the nodes and the user terminal are realized in the local mapping table through the user terminal identification and the node identification.
Further, in the routing process, the ground node and the satellite node are specifically routed according to the local mapping table stored in the ground node and the route calculated by the control center.
Further, the method further comprises: and carrying out periodic routing update on the global mapping table and the local mapping table.
Further, the periodically updating the global mapping table and the local mapping table includes: updating the global mapping table and the local mapping table at predetermined time intervals.
Further, the network management center is used for network state monitoring, situation display and equipment management.
In a second aspect, the present invention provides a system for implementing any one of the above methods for adapting satellite network resources customized for a user terminal, where the system includes: the satellite network comprises satellite nodes which are connected with each other, and the ground network comprises a ground node, a network management center and a control center which are connected in sequence;
the control center dynamically allocates network resources according to the request of the user terminal based on the constructed communication network, and calculates a real-time route based on the link state so that the allocated resources of the communication network are adapted to the current request of the user terminal to reduce the network congestion probability, wherein the request comprises the service type, the reservation time and the setting options of the request, and the setting options comprise a delay type, a packet loss rate type and a bandwidth type;
the ground node and the satellite node are used for carrying out data forwarding operation;
and the network management center is used for monitoring the network state, displaying the situation and managing the equipment.
The invention has the following beneficial effects:
the invention customizes the demand according to the special scene of the user, provides multiple resource adaptations based on the real-time link information, so that the satellite network system can provide corresponding optimal route forwarding service for the user, and increases the resource selectivity of the user, namely, the invention provides the resource adaptation support applied to multiple special scenes at the user side, so that the satellite network can obtain the fine-grained customization demand input of the user, thereby accurately providing the network resource adaptations based on the special scenes for the user, and further effectively solving the problems that the existing satellite network only provides a resource adaptation mechanism at the network side and neglects the customization demand of the user in various special scenes.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic flowchart of a method for adapting a satellite network resource customized for a user according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a user-customized satellite network resource adaptation system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a method for customized on-demand delivery provided by an embodiment of the present invention;
FIG. 4 is a schematic diagram of a method for calculating an optimal route according to a user customized requirement according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for customized on-demand delivery according to an embodiment of the present invention;
FIG. 6 is a flowchart illustrating calculation of an optimal route according to the customized demand provided by the embodiment of the present invention;
fig. 7 is a schematic flowchart of a periodic routing update according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a UDP data field provided by an embodiment of the present invention.
Detailed Description
The embodiment of the invention aims at the problem that the existing satellite network only provides a resource adaptation mechanism on the network side and neglects the customization requirements of users in various special scenes, and the satellite network can obtain the fine-grained customization requirement input of the users by providing the resource adaptation support applied to various special scenes on the user side, so that the network resource adaptation based on the special scenes is accurately provided for the users, and the resource allocation of the satellite network is better realized. The present invention will be described in further detail below with reference to the drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
A first embodiment of the present invention provides a method for adapting a satellite network resource customized for a user, and referring to fig. 1, the method includes:
s101, receiving a request sent by a user terminal through a communication network;
specifically, as shown in fig. 2, the communication network according to the embodiment of the present invention includes a satellite network and a ground network, where the satellite network includes interconnected satellite nodes, and the ground network includes a ground node, a network management center, and a control center, which are connected in sequence.
In addition, the request in the embodiment of the present invention includes a service type, a reservation time, and a communication resource requirement of the request, and the communication resource requirement includes a delay type, a packet loss rate type, and a bandwidth type.
In specific implementation, the ground node receives a request of a user terminal, and the ground node sends the request to the control center through the network management center, so that the control center performs routing calculation based on the request. And the control center is a centralized network controller and is used for registering the user terminal into the network and performing centralized route calculation based on the request of the user terminal. The network management center is used for monitoring network state, displaying situation and managing equipment.
As shown in fig. 3, in a specific implementation, an operator may specifically select a service type, a preset time (i.e., a time for processing a request), and a delay type, a packet loss rate type, and a bandwidth type from high-level options according to his/her needs.
It should be noted that fig. 3 is only an illustration of the embodiment of the present invention, and in the specific implementation, a person skilled in the art may also set other various types and the like for the request, so as to finally perform any setting according to different scene requirements of the user, which is not limited in this embodiment.
Generally, the embodiment of the invention provides resource adaptation support for multiple special scene applications at the user side, so that the satellite network can obtain fine-grained customization demand input of the user, thereby accurately adapting network resources for the user, and finally better distributing the satellite network resources to improve user experience.
S102, based on the communication network, dynamically allocating network resources according to the request of the user terminal, and calculating real-time routing based on the link state, so that the allocated resources of the communication network are adapted to the current request of the user terminal, and the network congestion probability is reduced.
That is to say, the embodiment of the present invention provides multiple resource adaptations based on real-time link information according to the customized requirements of the user in the special context, so that the satellite network system can provide corresponding optimal routing forwarding service for the user, thereby increasing the resource selectivity of the user, realizing the accurate network resource adaptation based on the special context for the user, and finally effectively solving the problem that the existing satellite network only provides a resource adaptation mechanism on the network side and neglects the customized requirements of the user in various special contexts.
In specific implementation, the embodiment of the present invention specifically sets a global mapping table and a local mapping table, where the global mapping table is set in the control center and the local mapping table is set in each node.
The global mapping table stores mapping relationships between user terminal identifiers and node identifiers, wherein the user terminal identifiers are used for uniquely identifying user terminals, and the node identifiers are used for uniquely identifying satellite nodes and ground nodes, that is, the global mapping table stores mapping relationships of all nodes in a network and network resource conditions of all nodes.
All nodes connected with the satellite node or the ground node and the conditions of the user terminal are stored in the local mapping table, and the corresponding mapping relations between the nodes and the user terminal are realized in the local mapping table through the user terminal identification and the node identification.
Generally, the control center of the embodiment of the present invention calculates real-time routes based on a preset global mapping table according to a request of a user terminal, and each node (i.e., a satellite node and a ground node) performs specific routes according to its own stored local mapping table and the routes calculated by the control center.
In addition, in specific implementation, the embodiment of the present invention further updates the global mapping table and the local mapping table according to a predetermined time interval.
The predetermined time interval may be set arbitrarily according to actual needs, and the present invention is not limited in this regard.
To sum up, the embodiment of the present invention provides a satellite network resource adaptation method for user customization, in which a user side may use a local client to initiate a transmission customization application as needed, a ground control center encapsulates different resource types in a data packet header after receiving a customization message, calculates a corresponding optimal route according to the resource types, and updates the route according to the user customization time, thereby implementing dynamic adaptation of network resources based on the user customization requirements.
The method according to the invention will be explained and illustrated in detail below with reference to fig. 2 to 8 by means of a specific embodiment:
as shown in fig. 2, the overall architecture of the embodiment of the present invention is based on a software-defined network technology, and includes a satellite network, a ground network and users, where the satellite network is composed of low-earth satellite nodes, and the ground network is composed of ground nodes, a control center and a network management center. The user can access the satellite network through the ground node, and can also directly access the satellite node through a specific terminal.
After the user accesses the satellite network or the ground network, the control center distributes user identification for the user, each network node has own node identification, and the user identification and the node identification are bound through a local mapping table of the node. Meanwhile, the control center also stores a global mapping table, and stores all node identifications and user identifications of the whole network. The method comprises the following steps of performing routing calculation and forwarding in a satellite network by using a node identifier, wherein a user identifier is only used for marking a user, so that the mobility support of the satellite network is realized; when the route is calculated, based on the idea of virtual topology, the dynamic topology of the satellite is divided into time slices according to a certain period, and the static topology is extracted from the time slices, so that the dynamic topology support of the satellite network is realized.
The embodiment of the invention is based on the framework and mainly comprises four steps, namely, customizing transmission according to needs by a user, collecting network link information, calculating an optimal route according to the customization needs of the user and periodically updating the route.
The user-customized on-demand transfer comprises: the starting point of the process of the invention is that a user initiates the on-demand transmission of the customized service to the control center. The user accesses the satellite network or the ground network, selects the service type through the customized client terminal transmitted according to the requirement after obtaining the user identification, fills the customized time transmitted according to the requirement, and then initiates a customized application to the control center. The application message is forwarded to a control center through a network node accessed by a user, the control center corresponds the service type selected by the user to the requirements of network resources, namely time delay, bandwidth and packet loss rate according to the user identification, the service type and the customized time, modifies user entries in a global mapping table of the control center at the starting moment of the customized time, modifies the resource type of the user to a corresponding value, and then the control center informs the network node accessed by the user to synchronously modify a local mapping table on the local node of the control center. When the end time of the customization time is reached, the control center changes the resource type of the user entry in the global mapping table back to a default value and informs the access network node to synchronously modify the local mapping table.
The global mapping table of the control center and the local mapping table of the network node are shown in tables 1 and 3, respectively:
TABLE 1 Global mapping Table
Table 2 local mapping table
The network link information collection according to the embodiment of the present invention includes:
link information collection is the basis for the satellite network to calculate routing and allocate network resources. All nodes in the network periodically acquire the link information of the nodes and report the link information to the control center, and the control center grasps the states of all links in the whole network, including the time delay, the bandwidth and the packet loss rate of each link and stores the states in a link information database.
The network node firstly collects the byte number and the number of the upstream and downstream data packets of each local port, and the real-time throughput of each port is obtained through calculation. Meanwhile, the node sends the detection packet to all ports of the node at regular time, and the adjacent network node of the node replies the node identification of the node after receiving the detection packet, so that the node obtains the time delay of each port and the corresponding neighbor node. And then, the node periodically reports the time delay, the throughput, the number of uplink and downlink data packets and the adjacent node information of each port to the control center.
The control center calculates the number of uplink and downlink data packets of each port reported by the node to obtain the packet loss rate of each port, stores the information of each port of the node as the link information (source node identification, source port number, time delay, bandwidth, packet loss rate and destination node identification) between the nodes in the link information database after the data are arranged, and for the same link data, the new data can cover the old data. The information collection process of all nodes in the whole network is consistent.
The method for calculating the optimal route according to the user customization requirement comprises the following steps: after the user sends the customized message to the control center according to the requirement, the control center provides the corresponding optimal route according to the customized message of the user in the reserved time, so as to achieve the effect of adapting the network resource according to the requirement.
After the user passes step 1, the control center modifies the global mapping table and the local mapping table according to the application of the user, and at this time, the user entry in the mapping table has the corresponding resource type. When a communication data packet of the user enters a satellite network through an access node, the access node sends a routing inquiry message to a control center according to a source node, a destination node and a resource type in the user data packet, the control center correspondingly adopts four different strategies of minimum time delay, maximum bandwidth, minimum packet loss and minimum hop count according to the resource type, extracts real-time information of all corresponding links from a link information database, takes link information corresponding to the resource type in the user data packet as a weight of each link, and performs weighted shortest path calculation of the whole network to obtain an optimal route meeting the customized requirements of the user.
After the calculation is completed, the control center issues routing entries to each network node along the way, and the user data packet can carry out data forwarding along the calculated optimal path, so as to realize communication according to needs.
The periodic routing update according to the embodiment of the present invention includes:
after the control center calculates the route according to the user requirement, the optimal route has a survival period. Because the optimal route is calculated based on the real-time link state, in order to continuously provide the optimal network resource adaptation for the user by the satellite network, the optimal route needs to be updated every other period, and the optimal route is recalculated according to the current link information.
The duration of the optimal route is the same as the customized time that the user sends to the control center. The periodic routing update is divided into two types according to different resource types required by users in the duration. For the time delay and the packet loss rate type, when the control center performs the first routing calculation, the duration of the issued routing entry is the same as the satellite network time slice period. Every 1 cycle, the control center can recalculate the route in real time according to the link information database and issue a new route entry. Each calculated route entry lasts until the end of the user's customized time. This is because the calculation and the issuing of the routing entry require time, and if the duration of the routing entry calculated each time is also 1 cycle, a vacuum period may occur during cycle switching, which causes a packet loss phenomenon. Meanwhile, if the control center fails, a new routing entry cannot be issued, and it is necessary to ensure that the node still has the routing entry at this time, and the user communication can be continuously maintained. The embodiment of the invention adopts different route updating strategies according to different resource requirements, and considers both the real-time performance of route calculation and the continuity of user service.
For the bandwidth type, the optimal route is calculated only once at the start time and does not change with the period. This is because if a calculation update policy that is the same as the time delay and the packet loss rate is adopted, when the route is recalculated next time, the currently calculated path still has the traffic before the user, which may cause the remaining bandwidth of the path to be smaller than that of other paths, resulting in frequent switching of the user path and causing congestion.
As shown in fig. 3 and 5, when the user 1 initiates the on-demand delivery of the customized application to the control center, the specific steps include:
1) a user 1 opens an interface of a customized client side for transmission according to needs, and selects a service type, wherein an emergency communication is taken as an example;
2) the user 1 fills in the transmission on demand [ appointment time ], including the starting time and the ending time of the customization time;
3) a user 1 clicks [ submit ], and a client sends an application message (the flag bit is 1, the user identifier, the resource type, the starting time and the ending time) to R1 through UDP (the flag bit 1 and the user IP are added to the head of a UDP data field, the flag bit is 1 byte, the IP4 byte is shown in fig. 8);
4) r1 receives the message, reads [ flag bit ] to 1, identifies that the message is an application message customized according to needs, searches a path to the control center in a routing table according to a mapping entry (user 1-IP, source node identification and destination node identification) of the user 1, sends the path to R2 and forwards the path to the control center;
5) the control center receives the message and replies an application success message (the flag bit is 2, the source node identifier, the destination node identifier and the message content is application success) to the R1;
6) the R1 receives the message, recognizes that the message is an on-demand application reply message according to the [ flag bit ] 2, and the R1 obtains the IP of the user 1 according to the [ user 1-IP ] in the UDP data domain in the step 4 and sends an application success message to the user 1;
7) the control center extracts the user identifier, the resource type, the start time and the end time in the message, and corresponds the service type to a value of a corresponding resource type according to a service type and resource type correspondence table (as table 3 is an example), where [ resource type ] is 1;
table 3 service type and resource type correspondence table
8) The control center modifies the item of the user 1 in the global mapping table according to the user identification at the initial moment, gives 1 the resource type, and informs the R1 to modify the local mapping table synchronously;
9) user 1 makes on-demand transmissions (as shown in fig. 5);
10) and at the end time, the control center modifies the user 1 entry in the global mapping table according to the user identifier, assigns 0 (default value) to the [ resource type ], and informs the R1 to modify the local mapping table synchronously.
As shown in fig. 4 and fig. 6, the embodiment of the present invention calculates an optimal route according to the customized demand of the user, including:
taking the example that after the user 1 applies for the [ emergency communication ] to the control center, the communication with the user 2 is initiated, as shown in fig. 6:
1) user 1 initiates communication with user 2;
2) the data packet of the user 1 enters R1, and R1 encapsulates a packet header for the data packet according to the user 1 entry in the local mapping table, wherein the packet header comprises a source node identifier, a destination node identifier and a resource type;
3) when R1 forwards, if finding that there is no route entry which can match (resource type) 1, then sending route inquiry message to inquire the control center;
4) the control center receives the message, extracts a resource type of 1, a source node identifier of R1 and a destination node identifier of R3, compares the resource type with a local service type and resource type corresponding table to know that the user requirement is time delay priority, and respectively acquires link time delay information of links R1-R2, R2-R4, R1-R3 and R3-R4 from a link information database;
5) the control center takes the time delay as the weight of each link, carries out weighted shortest path calculation, and calculates a path with the shortest time delay, namely R1-R3-R4;
6) the control center issues routing entries to R1, R3 and R4;
7) the user 1's data packets communicate with user 2 through paths R1-R2-R4.
As shown in fig. 7, the periodic routing update described in the embodiment of the present invention specifically includes:
taking as an example that the customization application from the user 1 to the control center is [ emergency communication ], the customization time is 10:00-11:00, and the communication with the user 2 is initiated after the customization is successful, as shown in fig. 4:
1) the control center receives a routing inquiry message with the resource type 1 sent from R1 at the starting time of the customized time of 10:00:00, then the time delay information in the link information database is taken, the time delay is taken as the weight of each link for shortest path calculation, and a path with the minimum residual time delay, namely R1-R3-R4, is calculated;
2) the control center issues routing entries to R1, R3 and R4, the duration of the optimal routing entry reaches the end time of the customized time 11:00:00, and the entry is automatically cleared after expiration;
3) the user 1's packet matches the routing entry, communicating with user 2 via path R1-R3-R4;
4) the control center takes the time delay information in the link information database after 5 minutes (10:05:00), and takes the time delay as the weight of each link to calculate the shortest path to obtain a path with the minimum time delay;
5) the control center issues routing entries to the routers passed by the path, and the duration of the optimal routing entries is up to the end time (11:00: 00);
6) and repeating the steps 4-5 until the stop time (11:00:00) of the on-demand service customized by the user is reached.
Generally, the satellite network system and the resource adaptation method of the embodiment of the invention have at least the following advantages:
firstly, the method of the invention solves the problems that the existing satellite network only provides a resource adaptation mechanism at the network side and omits the customization requirements of users under various special scenes. Resource adaptation support for application of various special scenes is provided at a user side, so that a satellite network can obtain fine-grained customization demand input of a user, and network resource adaptation based on the special scenes is accurately provided for the user;
secondly, the embodiment of the invention customizes the requirements according to the special scene of the user, provides multiple resource adaptations based on the real-time link information, and the satellite network system can provide corresponding optimal route forwarding service for the user, thereby increasing the resource selectivity of the user;
in addition, the embodiment of the invention can provide continuous and stable network resource adaptation for the user by the control center through a periodic routing update mechanism in the customization time of the user, and provide continuous guarantee for the user to communicate on demand under various special scene applications.
A second embodiment of the present invention provides a system for implementing the method for adapting satellite network resources customized for a user terminal according to any one of the first embodiments of the present invention, where the system includes: the satellite network comprises satellite nodes which are connected with each other, and the ground network comprises a ground node, a network management center and a control center which are connected in sequence;
the control center dynamically allocates network resources according to the request of the user terminal based on the constructed communication network, and calculates a real-time route based on the link state so that the allocated resources of the communication network are adapted to the current request of the user terminal to reduce the network congestion probability, wherein the request comprises the service type, the reservation time and the setting options of the request, and the setting options comprise a delay type, a packet loss rate type and a bandwidth type;
the ground node and the satellite node are used for carrying out data forwarding operation;
and the network management center is used for monitoring the network state, displaying the situation and managing the equipment.
In other words, the embodiment of the invention aims at the problem that the existing satellite network only provides a resource adaptation mechanism on the network side and neglects the customization requirements of users in various special scenes, and provides the resource adaptation support applied to various special scenes on the user side, so that the satellite network can obtain the fine-grained customization requirement input of the users, and accurately provides the network resource adaptation based on the special scenes for the users, thereby better realizing the resource allocation of the satellite network.
The relevant content of the embodiments of the present invention can be understood by referring to the first embodiment of the present invention, and will not be discussed in detail herein.
Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.
Claims (10)
1. A satellite network resource adaptation method for user customization is characterized by comprising the following steps:
receiving a request sent by a user terminal through a communication network, wherein the communication network comprises a satellite network and a ground network, the satellite network comprises mutually connected satellite nodes, and the ground network comprises a ground node, a network management center and a control center which are sequentially connected;
based on the communication network, dynamically allocating network resources according to the request of the user terminal, and calculating a real-time route based on the link state, so that the allocated resources of the communication network are adapted to the current request of the user terminal, thereby reducing the network congestion probability;
the request comprises the service type, the reservation time and the communication resource requirement of the request, and the communication resource requirement comprises a time delay type, a packet loss rate type and a bandwidth type.
2. The method of claim 1,
and receiving a request of a user terminal through the ground node, and sending the request to the control center through the network management center by the ground node so as to enable the control center to perform routing calculation based on the request.
3. The method of claim 2,
the control center is a centralized network controller and is used for registering the user terminal into the network and performing centralized route calculation based on the request of the user terminal.
4. The method of claim 3,
the control center calculates real-time route based on a preset global mapping table according to the request of the user terminal;
the global mapping table stores mapping relationships between user terminal identifiers and node identifiers, wherein the user terminal identifiers are used for uniquely identifying user terminals, and the node identifiers are used for uniquely identifying satellite nodes and ground nodes, that is, the global mapping table stores mapping relationships of all nodes in a network and network resource conditions of all nodes.
5. The method of claim 4, further comprising:
local mapping tables corresponding to the satellite nodes and the ground nodes are respectively arranged on the satellite nodes and the ground nodes;
all nodes connected with the satellite node or the ground node and the conditions of the user terminal are stored in the local mapping table, and the corresponding mapping relations between the nodes and the user terminal are realized in the local mapping table through the user terminal identification and the node identification.
6. The method of claim 5,
in the routing process, the ground node and the satellite node are specifically routed according to the local mapping table stored in the ground node and the local mapping table stored in the satellite node and the route calculated by the control center.
7. The method of claim 5, further comprising:
and carrying out periodic routing update on the global mapping table and the local mapping table.
8. The method of claim 7, wherein periodically updating the global mapping table and the local mapping table comprises:
updating the global mapping table and the local mapping table at predetermined time intervals.
9. The method according to any one of claims 1 to 8,
the network management center is used for monitoring network state, displaying situation and managing equipment.
10. A system for implementing the method for adapting satellite network resources customized for a user terminal according to any one of claims 1 to 9, the system comprising: the satellite network comprises satellite nodes which are connected with each other, and the ground network comprises a ground node, a network management center and a control center which are connected in sequence;
the control center dynamically allocates network resources according to the request of the user terminal based on the constructed communication network, and calculates a real-time route based on the link state so that the allocated resources of the communication network are adapted to the current request of the user terminal to reduce the network congestion probability, wherein the request comprises the service type, the reservation time and the setting options of the request, and the setting options comprise a delay type, a packet loss rate type and a bandwidth type;
the ground node and the satellite node are used for carrying out data forwarding operation;
and the network management center is used for monitoring the network state, displaying the situation and managing the equipment.
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