CN100466491C - Mobile satellite multiprotocol tag exchange network system and operating method thereof - Google Patents
Mobile satellite multiprotocol tag exchange network system and operating method thereof Download PDFInfo
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- CN100466491C CN100466491C CNB2007100645105A CN200710064510A CN100466491C CN 100466491 C CN100466491 C CN 100466491C CN B2007100645105 A CNB2007100645105 A CN B2007100645105A CN 200710064510 A CN200710064510 A CN 200710064510A CN 100466491 C CN100466491 C CN 100466491C
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
- H04B7/0604—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching with predefined switching scheme
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0014—Three-dimensional division
- H04L5/0023—Time-frequency-space
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0042—Arrangements for allocating sub-channels of the transmission path intra-user or intra-terminal allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0078—Timing of allocation
- H04L5/0082—Timing of allocation at predetermined intervals
- H04L5/0083—Timing of allocation at predetermined intervals symbol-by-symbol
Abstract
A network system of mobile satellite multi-protocol countermark exchange comprises user layer for providing user state information and service request information, access layer for connecting said network to the other network and the other user terminal to realize relevant functions and kernel layer for carrying out exchange-retransmission and path maintenance of service information according to multi-protocol countermark. Its operating method is also disclosed.
Description
Technical field
The present invention relates to the aerospace information field, relating in particular to a kind of is core with the mobile-satellite, utilizes satellite node to realize the displacement satellite multi-protocol tag switching network system and the method for operation thereof of integrated services communications such as the whole world (or zone) data, multimedia.
Background technology
The mobile satellite communication network need be integrated with the cellular system of land as the important component part of next generation mobile communication (4G), for different users provides ubiquitous global communication network.This needs the mobile satellite communication network to realize with the seamless link of ground communication network and is user's quality (Quality of service is called for short QoS) service of providing services on the Internet, and needs the optimal satellite resource.
Existing broadband satellite system mainly adopts satellite asynchronous transfer mode (Asynchronismtransmission mode is called for short ATM) technology and satellite IP technology.
Atm technology can provide good QoS to guarantee for different business, and can utilize method such as connection-oriented virtual path and traffic classification among the ATM for mobile satellite network provides effective traffic engineering design, the service bandwidth supported is relatively large.But the weak point of atm technology is: can't be with widely used IP-based internet (Internet) is effectively compatible at present.
Satellite IP technology can provide the seamless link with internet, ground (Internet), and realize simple, have good application prospects, but the weak point of satellite IP technology is: the QoS that needs to solve Network guarantees and problem such as network traffic engineering.
Summary of the invention
The objective of the invention is: at atm technology in the above-mentioned existing broadband satellite system can't be with IP effectively compatible and satellite IP Technology Need solve the defective of problems such as the QoS assurance of Network and network traffic engineering, a kind of mobile-satellite multiple network protocol tag exchange network system and method for operation thereof are provided, can realize the seamless link of mobile satellite communication network and ground communication network, and provide QoS and network traffic engineering service for the user, and topological dynamic at mobile satellite network, with the staticize of mobile satellite network dynamic topology, make multiprotocol label switching (Multi-protocol label switching is called for short MPLS) technology be applied to mobile satellite network.
To achieve these goals, the invention provides a kind of mobile satellite multiprotocol tag exchange network system, comprise the client layer, Access Layer and the core layer that connect successively: client layer is used to provide state of user information and service requesting information; Access Layer is used to carry out the connection of mobile satellite multiprotocol label exchange network with other network and user terminal, realizes management of route initiation and label distribution and QoS of customer and corresponding access flow Engineering Control function; Core layer is used for business information is exchanged forwarding, route maintenance function by multiprotocol label; Described core layer comprises: forwarding module, be connected with the route maintenance module, and be used for carrying out business information and transmit according to the tag distribution protocol of setting up; The route maintenance module is connected with forwarding module, is used between node taking place being responsible for the maintenance in path when unusual.
In the technique scheme, described Access Layer comprises User Status module, network status module, routing calculation module, signaling management module: the User Status module is used to route to calculate user request information is provided, and described request information comprises QoS requirement information; Network status module is connected with routing calculation module, is used to the state information that route is calculated provides mobile satellite network; Network status module further can comprise topological state information submodule and link-state information submodule; Routing calculation module is connected the optimal path that is used to calculate the route shortest path He satisfies QoS of customer requirement and network traffic engineering with the signaling management module with network status module; The signaling management module is connected with routing calculation module, be used for being responsible for the mobile satellite multiprotocol label forwarding, distribute, cancel, mapping and maintenance function.
Described Access Layer can also comprise: the route maintenance module, with routing calculation module, signaling management module and label switched path (Label Switching Path, be called for short LSP) the administration module connection, be used to safeguard the continuation and the validity of the communication of mobile satellite network existing route, handle catastrophic failure; The LSP administration module, be connected with routing calculation module, signaling management module, route maintenance module and network status module, be used for setting up corresponding LSP according to the signaling protocol of routing calculation module result calculated and signaling management module, and be responsible for the maintenance of this LSP and cancel, and LSP set up and cancel the variation that causes feed back to network status module.
The invention allows for a kind of method of operation of mobile satellite multiprotocol tag exchange network system, comprise: Access Layer generates/safeguards the network state information of mobile satellite multiprotocol label exchange network and the path that business information is transmitted according to user state information and the business information obtained from client layer; Described generation/safeguard that the network state information of mobile satellite multiprotocol label exchange network and the path that business information is transmitted comprise: mobile satellite network generates network state information by initialization; Generate and safeguard path according to described network state information and the service requesting information obtained to this business information transmission; Core layer will be carried out the exchange forwarding and the effectively transmission of business information by described path.
Also can comprise after generating network state information:, network state information is adjusted and safeguarded according to the variation of mobile satellite network topology and the situation of Internet resources.
The present invention introduces the mobile satellite communication network with the MPLS technology, can realize that mobile satellite communication network and present widely used IP-based internet (Internet) are effectively compatible, and provide QoS and network traffic engineering service for the user, dynamic topology at the mobile satellite communication network, system is divided into three layers, and corresponding functional modules is set at concrete layer, as: the route maintenance module of Access Layer, at the topological dynamic problem of satellite, can adapt to the validity of communication under this environment specially; In the network status module topological state information submodule and link-state information submodule are separated, can better adapt to the network topology dynamic; Routing calculation module can provide QOS to guarantee but also can be miscellaneous service effectively at the long characteristics of satellite delay.The present invention also provides the method for operation of system, with the dynamic topology staticize, can effectively reduce the influence of topological dynamic to network; The network state information that generates is safeguarded, kept the mobile satellite communication stability of network.
The present invention has following beneficial effect:
1) with at present widely used IP-based internet (Internet) is effectively compatible, and for corresponding QoS and network traffic engineering service are provided at different business;
2) can adapt to the characteristics of mobile satellite network long delay, topological dynamic and Internet resources costliness;
3) can support multiple business transmission such as data, multimedia.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Description of drawings
Fig. 1 is mobile satellite multiprotocol tag exchange network system structure embodiment one schematic diagram of the present invention;
Fig. 2 is Access Layer embodiment one structural representation of mobile satellite multiprotocol tag exchange network system of the present invention;
Fig. 3 is Access Layer embodiment two structural representations of mobile satellite multiprotocol tag exchange network system of the present invention;
Fig. 4 is method of operation embodiment one flow chart of mobile satellite multiprotocol tag exchange network system of the present invention;
Fig. 5 is method of operation embodiment two flow charts of mobile satellite multiprotocol tag exchange network system of the present invention;
Fig. 6 is method of operation embodiment three flow charts of mobile satellite multiprotocol tag exchange network system of the present invention
Fig. 7 resolves schematic diagram for the method for operation state of mobile satellite multiprotocol tag exchange network system of the present invention;
Fig. 8 is for generating embodiment one flow chart of network state information in the method for operation of mobile satellite multiprotocol tag exchange network system of the present invention;
Fig. 9 is for generating the embodiment schematic diagram that network is initially transmitted in the method for operation of mobile satellite multiprotocol tag exchange network system of the present invention;
The state that Figure 10 generates and safeguards for network state information in the method for operation of mobile satellite multiprotocol tag exchange network system of the present invention is resolved schematic diagram.
Embodiment
Though the MPLS technology can provide the seamless link with internet, ground (Internet), problems such as the QoS assurance of solution Network and network traffic engineering.But mobile satellite network and ground network have the difference, particularly its topological time variation of essence, make traditional MPLS technology based on fixed topology can not directly apply to mobile satellite network.The present invention simply is applied to the mobile satellite communication network with the MPLS technology, but at the topological dynamic characters of mobile satellite communication network, with the dynamic topology staticize, effectively reduces the influence of topological dynamic to network; The network state information that generates is safeguarded, kept the mobile satellite communication stability of network, and on the basis of system layer, different functional modules is set at concrete layer.Below by Fig. 1-Figure 10 system of the present invention and method of operation thereof are elaborated.
Fig. 1 is mobile satellite multiprotocol tag exchange network system structure embodiment one schematic diagram of the present invention.As shown in Figure 1, mobile satellite multiprotocol label exchange (Multi-protoco Label Switch is hereinafter to be referred as MPLS) network system is made up of the client layer, Access Layer and the core layer that connect successively:
Client layer 1 is used to provide information such as state of user information and service request; Client layer 1 can comprise: satellite hand-held mobile terminal 11, terminal node in small, dedicated local area network (LAN) 12 or other network 13, other network 13 is as local area network (LAN), public telecommunication network etc., and user's terminal node of the communication network of hand-held mobile terminal or client layer via satellite is connected with Access Layer.
Access Layer 2, be used to carry out of the connection of mobile-satellite MPLS network with other network and client layer, realization to the classification of business, set up binding between forwarding equivalence class and the multi-protocols switch label (being the MPLS label), constraint label switched path (Label Switch Path is hereinafter to be referred as LSP) calculating, distribute label, peel off label and functions such as QoS of customer management and corresponding access flow Engineering Control; Access Layer can be realized function corresponding by label edges switch router (Label edge Router is called for short LER).LER is specifically as follows mobile-satellite 21, is connected with satellite hand-held mobile terminal 11 in the client layer, and satellite hand-held mobile terminal 11 is directly inserted the mobile-satellite net; LER can also be small-scale terrestrial portable terminal 22, and small, dedicated local area network (LAN) 12 is inserted the mobile-satellite net; LER can also be gateway station station 23, with the terminal node access mobile-satellite net of other network 13.Because workload and amount of calculation that LER need handle are more, the MPLS label distribution when so the mobile-satellite 21 in the Access Layer can only be handled satellite hand-held mobile terminal 11 and inserts and peel off function, all the other functions are realized by gateway station station 23 or small-scale terrestrial portable terminal 22.
The present invention introduces the mobile satellite communication network with the MPLS technology, can realize that mobile satellite communication network and present widely used IP-based internet (Internet) are effectively compatible, and provide QoS and network traffic engineering service for the user, dynamic topology at the mobile satellite communication network, system is divided into three layers, and corresponding functional modules is set at concrete layer, in conjunction with the characteristics of MPLS technology and mobile satellite network, make the MPLS better application in mobile satellite network.Fig. 2-Fig. 3 elaborates to the concrete structure function of each layer.
Fig. 2 is Access Layer embodiment one structural representation of mobile satellite multiprotocol tag exchange network system of the present invention.As shown in Figure 2, Access Layer comprises following 4 functional modules:
The User Status module is connected with routing calculation module, is used to route to calculate user request information is provided, and described request information comprises QoS requirement information;
Network status module is connected with routing calculation module, is used to the state information that route is calculated provides mobile satellite network, and network state information comprises static topological state information and dynamic link-state information;
Routing calculation module is connected with the signaling management module with network status module, be used to calculate shortest path by with the optimal path that satisfies QoS of customer requirement and network traffic engineering; Routing calculation module is that mobile-satellite MPLS network system realization service quality and traffic engineering control are given security;
The signaling management module is connected with routing calculation module, be used for according to relevant signaling protocol be responsible for mobile-satellite MPLS label forwarding, distribute, cancel, shine upon and function such as maintenance.The signaling management module can support the tag distribution protocol (CR_LDP) of tag distribution protocol (LDP), restriction route, based on the RSVP (RSVP_TE) of traffic engineering expansion etc.
Fig. 3 is Access Layer embodiment two structural representations of mobile satellite multiprotocol tag exchange network system of the present invention.The Access Layer of mobile-satellite MPLS network system comprises 6 functional modules in the present embodiment, and each inside modules structure has been carried out refinement, and is specific as follows:
1) User Status module is connected with routing calculation module, is used to route to calculate user request information is provided, and described request information comprises QoS requirement information;
2) network status module is connected with routing calculation module, is used to the state information that route is calculated provides mobile satellite network, and network status module further comprises:
Topology state information submodule, be connected with routing calculation module, mainly be the variation function that orbital motion parameter via satellite obtains topology, utilize this function that the information relevant with network topology is provided, as the internodal switch instances of mobile-satellite, internodal propagation delay time information etc.;
The link-state information submodule is connected with routing calculation module, mainly utilizes link-state protocol to obtain the multidate information of mobile-satellite MPLS network link, as link failure situation, bandwidth usage etc.
3) routing calculation module is connected with the signaling management module with network status module, be used to calculate shortest path by with the optimal path that satisfies QoS of customer requirement and network traffic engineering; Routing calculation module further comprises:
Do not have constraint route calculating sub module, be connected with network status module, the network state information that is used for providing according to network status module calculates the route shortest path; This result of calculation can be LDP service (carrying out label distribution according to shortest path) and also can use (directly carrying out internodal hop-by-hop routing according to shortest path) directly for the 3rd layer of hop-by-hop route;
Constraint route calculating sub module, be connected with network status module, the network state information that provides according to network status module and user request information are provided to be calculated and satisfies that QoS of customer requires and the optimal path of network traffic engineering, result of calculation can be the tag distribution protocol (CR_LDP) of direct restriction route, (these agreements are carried out resource request according to the optimal path that calculates based on the RSVP protocol service such as (RSVP_TE) of traffic engineering expansion, and finally set up optimal path), for realizing service quality and traffic engineering control, mobile-satellite MPLS network system gives security;
4) signaling management module is connected with routing calculation module, be used for according to label protocol be responsible for mobile-satellite MPLS label forwarding, distribute, cancel, shine upon and function such as maintenance.
5) route maintenance module is connected with routing calculation module, signaling management module and LSP administration module, is used to safeguard the continuation and the validity of mobile satellite network existing route communication, handles catastrophic failure; This module further comprises:
Star ground switching submodule is connected with signaling management module and LSP administration module, is used for handling mobile satellite network geaster ground and switches, and reduces star ground and switches existing route and network service Effect on Performance;
Switching submodule between star is connected with signaling management module and LSP administration module, is used for handling between the mobile satellite network geaster and switches, and reduces to switch between star existing route and network service Effect on Performance;
The fault recovery submodule is connected with signaling management module and LSP administration module, is used to handle the fault of various bursts, reduces fault to the network service Effect on Performance;
Wherein, the switching submodule emphasis is handled various switchings in the satellite network between the switching of star ground, star, to the influence of existing route and network performance, safeguards the continuation and the validity of existing route communication with various switchings in the reduction satellite network; The fault recovery submodule mainly handle various at random with the fault of burst, reduce the influence of fault to communication.
The route maintenance module is at dynamic, the time variation of mobile-satellite MPLS network topology, to guarantee the dynamic condition continuation of communication down.
6) LSP administration module, be connected with routing calculation module, signaling management module, route maintenance module and network status module, be used for setting up corresponding label switched path (LSP) according to the signaling protocol of routing calculation module result calculated and signaling management module, and be responsible for the maintenance of this LSP and cancel, the foundation of LSP and cancel and will the partial parameters in the network state of node be changed, can feed back in the network status module by link-state protocol, calculating for later route provides new network state information.
The route maintenance module of Access Layer specially at the topological dynamic problem of satellite, can adapt to the validity of communication under this environment; In the network status module topological state information submodule and link-state information submodule are separated, can better adapt to the network topology dynamic; Routing calculation module can provide QOS to guarantee but also can be miscellaneous service effectively at the long characteristics of satellite delay.
Core layer can comprise in the system of the present invention: forwarding module, be connected with the route maintenance module, and be used for carrying out business information and transmit according to the LDP that sets up; The route maintenance module is connected with forwarding module, is used between node taking place being responsible for the maintenance in path when unusual.Because the core layer structure is comparatively simple, no longer drawing at this is illustrated.
In sum, system of the present invention has following beneficial effect: the characteristics that 1) can adapt to mobile satellite network long delay, topological dynamic and Internet resources costliness; 2) can support multiple business transmission such as data, multimedia; 3) has the ability that corresponding QoS is provided at different business; 4) can realize that mobile satellite communication network and present widely used IP-based internet are effectively compatible.
The present invention also provides a kind of method of operation of mobile-satellite MPLS network system, and as shown in Figure 4, method of operation embodiment one flow chart for mobile satellite multiprotocol tag exchange network system of the present invention specifically comprises:
Step 1: Access Layer generates/safeguards the network state information of mobile satellite multiprotocol label exchange network and the path that business information is transmitted according to user state information and the business information obtained from client layer;
Step 2: core layer will be carried out the exchange forwarding and the effectively transmission of business information by described path.
The method of the invention generates network state information and active path with the dynamic topology staticize, can effectively reduce the influence of topological dynamic to the mobile satellite network system; The network state information that generates is safeguarded, kept the mobile satellite communication stability of network.
Fig. 5 is method of operation embodiment two flow charts of mobile satellite multiprotocol tag exchange network system of the present invention, comprising:
Step 11: mobile satellite network generates network state information by initialization;
Step 12: generate and safeguard path breath to this business information transmission according to described network state information and the service requesting information obtained;
Step 2: the exchange of carrying out business information according to described path is transmitted and effectively transmission.
In mobile-satellite MPLS network normal course of operation, need set up corresponding network state information by being initialized as in the network main node, generate and safeguard the path that this business information is transmitted according to this network state information and concrete service requesting information then, on this basis, realize to miscellaneous service information fast, effectively transmit and distribute.
Fig. 6 is method of operation embodiment three flow charts of mobile satellite multiprotocol tag exchange network system of the present invention.As shown in Figure 6, present embodiment also comprises after generating network state information:
Step 11 ' according to the variation of mobile satellite network topology and the situation of Internet resources, network state information is adjusted and safeguarded.
Fig. 7 resolves schematic diagram for the method for operation state of mobile satellite multiprotocol tag exchange network system of the present invention.As shown in Figure 7, be mobile satellite multiprotocol label exchange network method of operation view of the present invention, comprise: the generation of network state information, the maintenance of network state information, path generation, route maintenance and path discharge.
The generation of network state information: by be initialized as node main in the network set up corresponding network state information (this state only netinit and main node replenish or impaired situation under carry out), this function can be realized by network status module embodiment illustrated in fig. 3 in the system of the present invention;
The maintenance of network state information: after generating network state information, each node will be safeguarded network state information separately, adjust the state information of whole network, and this function can be realized by signaling management module embodiment illustrated in fig. 3 in the system of the present invention;
After mobile-satellite MPLS netinit finished, whole network entered dynamic balance state, and at this moment network begins to insert customer service by client layer, the effectively reliable distribution that the industry of going forward side by side is engaged in.The distribution that the user inserts laggard industry affair can simply be described as: path generation and transmission, route maintenance, path discharge three parts, as shown in Figure 7.
The path generates: after the user inserted mobile-satellite MPLS network system, user profile that provides when inserting according to the user and professional application information were set up corresponding QoS path, and this function can be realized by routing calculation module embodiment illustrated in fig. 3 in the system of the present invention;
Route maintenance: validity and continuation to the path communication that generated are safeguarded, the continuation of communication when the mobile satellite network system the most important thing is to guarantee the node switching, this function can be realized by route maintenance module embodiment illustrated in fig. 3 in the system of the present invention;
The path discharges: during sign off, the network resource that the path is shared discharges, and this function can be realized by LSP administration module embodiment illustrated in fig. 3 in the system of the present invention.
Process to generation and maintaining network state information describes below, referring to Fig. 8, for generating the embodiment flow chart of network state information, as shown in Figure 8, comprising:
Step 111: choose discrete time series, and calculate the static network topology information according to described discrete time series;
Step 112:, generate the initial network state information of each node according to described static network topology information and the network link information of obtaining.
Generate network state information and mainly comprise two parts: static topological model initialization and multiprotocol label initialization, i.e. step 111 and step 112.
Static topological model initialization is primarily aimed at the characteristics (as time variation, long delay and periodically etc.) of mobile satellite network topology, by choosing suitable mobile satellite network discrete time series, thereby obtains the static network topology information.Choose the static network topology information of discrete time series and calculating correspondence and need carry out the calculating of relative complex, therefore, generally the ground operation control centre (or ground network administrative center) by Access Layer in the native system finishes, and specifically comprises:
1) operation control centre in ground is according to concrete mobile-satellite constellation orbital motion parameter, obtain suitable discrete time series S={t0, t1, ..., tn}, discrete time series is made up of n discrete time point and (is comprised the time point that each node switches in the described discrete time series, it is the switching time of node), then time series S is sent to node (satellite main in the mobile satellite network, gateway station station etc.), utilize this discrete time series dynamic network system can be used as the network of n instantaneous static state, thereby reduce the influence that dynamic topology brings calculation of complex to various algorithms and agreement in the mobile-satellite MPLS technology;
2) operation control centre in ground calculates the corresponding static network topology information (comprising nodal information, neighbor information, chain circuit transmission time delay information, handover information etc.) of each discrete time point at each discrete time point among the discrete time series S, and sends to each node.The static network topology information is the important component part of each meshed network state information.
Step 112 shown in Figure 8 is the initialization of MPLS, and for mobile satellite network, the source of MPLS network state information has two: promptly static topology information and link information.After operation control centre in ground provides the static network topology information, in the network link information of basis by the acquisition of dynamic link status protocol, can set up the initial network state information table of each node, in conjunction with MPLS conversation initialization and label initialization, set up final MPLS network and initially transmit then.
Referring to Fig. 9, for generating the embodiment schematic diagram that network is initially transmitted in the inventive method.Contrast the generative process detailed description that Fig. 9 initially transmits the MPLS network below:
1) after node is received the static network topology information that operation control centre in ground provides, generates the static topology information table of each node;
2) node utilizes existing dynamic link status protocol, as OSPF (open shortest path first, be called for short OSPF) etc., obtains the dynamic link information of network, and generates the dynamic link information table;
3) according to the static topology information and the dynamic link information table that have generated, obtain the initial network state information table of each node, comprise node, neighbours, expense and information that some are relevant with QoS (as the propagation delay time of link, bandwidth etc.) in the initial network state information table of generation at least.
4) according to shortest path first (typical) as dijkstra's algorithm, generate three layers of routing table of node, according to three layers of routing table, node can carry out towards connectionless hop-by-hop routing forwarding, and can be under special status (as the gateway station station do not have or when being ruined) realize autonomous route on the star of business information;
5) mobile-satellite MPLS network node also carries out tag distribution protocol (Label Distributionprotocol, abbreviation LDP) initialization, each node will be by LDP initial message exchange session parameter (comprising LDP protocol version, label distribution method, time value etc.), in conjunction with three layers of routing table that generated, obtain initially transmitting based on the MPLS network of destination address, this initially transmits to can be towards connectionless data service provides the label exchange.
The state that Figure 10 generates and safeguards for network state information in the method for operation of mobile satellite multiprotocol tag exchange network system of the present invention is resolved schematic diagram.As shown in figure 10, generative process comprises static topological model initialization and MPLS initialization, and mobile-satellite MPLS network can generate an initial network state information table by initialization on each node in network.
Init state only just can trigger in both cases: network is initial forever to increase (node replenishes) when setting up and in the network or cancellation (node is impaired) is a certain or some main node the time.In mobile-satellite MPLS network operation process, node need constantly be safeguarded the network state information of oneself, guarantees the customer service calculating that inserts for needs or distributes correct path, and can recover fast and effectively when switching or fault.When increasing or cancel main node, static topology information or dynamic link information are upgraded.
When system belongs to discrete time point in the discrete time series time of running, utilize the static network topology information of described moment correspondence, original static topology information is upgraded;
When the dynamic link state information of described moment network changes, original dynamic link information is upgraded, according to static state and the dynamic link topology information upgraded original three layers of routing table are upgraded;
When the state of node changes in the network, utilize dynamic link agreement and tag distribution protocol that original label information table is upgraded; According to label information table and three layers of routing table of upgrading, what obtain to upgrade initially transmits.
As shown in figure 10, according to new discrete time series static topology information is upgraded, link multidate information refresh time upgrades dynamic link information.When other information change such as service request from user, also need information is upgraded, and network state information is safeguarded according to these updated information.
It should be noted that at last: above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (21)
1. a mobile satellite multiprotocol tag exchange network system is characterized in that, comprises the client layer, Access Layer and the core layer that connect successively:
Client layer is used to provide state of user information and service requesting information;
Access Layer is used to carry out the connection of mobile satellite multiprotocol label exchange network with other network and user terminal, realizes management of route initiation and label distribution and QoS of customer and corresponding access flow Engineering Control function;
Core layer is used for business information is exchanged forwarding, route maintenance function by multiprotocol label;
Described core layer comprises:
Forwarding module is connected with the route maintenance module, is used for carrying out business information according to the tag distribution protocol of setting up and transmits;
The route maintenance module is connected with forwarding module, is used between node taking place being responsible for the maintenance in path when unusual.
2. system according to claim 1 is characterized in that, described client layer is the terminal node in portable terminal and/or the communication network.
3. system according to claim 1 is characterized in that, described Access Layer comprises User Status module, network status module, routing calculation module, signaling management module:
The User Status module is used to route to calculate user request information is provided, and described request information comprises QoS requirement information;
Network status module is connected with routing calculation module, is used to the state information that route is calculated provides mobile satellite network;
Routing calculation module is connected the optimal path that is used to calculate the route shortest path He satisfies QoS of customer requirement and network traffic engineering with the signaling management module with network status module;
The signaling management module is connected with routing calculation module, be used for being responsible for the mobile satellite multiprotocol label forwarding, distribute, cancel, mapping and maintenance function.
4. system according to claim 3 is characterized in that, described Access Layer also comprises:
The route maintenance module is connected with routing calculation module, signaling management module and label switched path administration module, is used to safeguard the continuation and the validity of mobile satellite network existing route communication, handles catastrophic failure;
The label switched path administration module, be connected with routing calculation module, signaling management module, route maintenance module and network status module, be used for setting up corresponding label switched path according to the signaling protocol of routing calculation module result calculated and signaling management module, and be responsible for the maintenance of this label switched path and cancel, and label switched path set up and cancel the variation that causes feed back to network status module.
5. according to claim 3 or 4 described systems, it is characterized in that described network status module comprises:
Topology state information submodule is connected with routing calculation module, is used to the information that provides relevant with network topology;
The link-state information submodule is connected with routing calculation module, is used to provide the multidate information of network link.
6. according to claim 3 or 4 described systems, it is characterized in that described routing calculation module comprises:
Do not have constraint route calculating sub module, be connected with network status module, the network state information that is used for providing according to network status module calculates the route shortest path;
Constraint route calculating sub module is connected with network status module, the network state information that provides according to network status module and user request information calculating is provided satisfies that QoS of customer requires and the optimal path of network traffic engineering.
7. system according to claim 4 is characterized in that, described route maintenance module comprises:
Star ground switching submodule is connected with signaling management module and label switched path administration module, is used for handling mobile satellite network geaster ground and switches, and reduces star ground and switches existing route and network service Effect on Performance;
Switching submodule between star is connected with signaling management module and label switched path administration module, is used for handling between the mobile satellite network geaster and switches, and reduces to switch between star existing route and network service Effect on Performance;
The fault recovery submodule is connected with signaling management module and label switched path administration module, is used to handle the fault of various bursts, reduces fault to the network service Effect on Performance.
8. according to claim 3,4 or 7 described systems, it is characterized in that described Access Layer is the label edges switch router.
9. system according to claim 8 is characterized in that, described label edges switch router is positioned at: gateway station station, small-scale terrestrial portable terminal or satellite node.
10. according to claim 1,2,3,4,7 or 9 described systems, it is characterized in that described core layer is a LSR, described LSR is positioned at satellite node.
11. the method for operation of a mobile satellite multiprotocol tag exchange network system is characterized in that, comprising:
Access Layer generates/safeguards the network state information of mobile satellite multiprotocol label exchange network and the path that business information is transmitted according to user state information and the business information obtained from client layer; Described generation/safeguard that the network state information of mobile satellite multiprotocol label exchange network and the path that business information is transmitted comprise: mobile satellite network generates network state information by initialization; Generate and safeguard path according to described network state information and the service requesting information obtained to this business information transmission;
Core layer will be carried out the exchange forwarding and the effectively transmission of business information by described path.
12. method according to claim 11 is characterized in that, also comprises after the described generation network state information:
According to the variation of mobile satellite network topology and the situation of Internet resources, network state information is adjusted and safeguarded.
13., it is characterized in that described generation network state information comprises according to claim 11 or 12 described methods:
Choose discrete time series, and calculate the static network topology information according to described discrete time series;
Network dynamic link information according to described static network topology information and reed are got generates the initial network state information table of each node.
14. method according to claim 13 is characterized in that, the described discrete time series of choosing, and calculate the static network topology information according to described discrete time series and specifically comprise:
According to the operational factor of mobile satellite network, to choose the discrete time series that comprises mobile-satellite node switching time and described discrete time series is sent to the main node of mobile satellite network, described discrete time series is made up of a plurality of discrete time points;
Calculate the corresponding static network topology information of each discrete time point in the discrete time series, and send to each node of mobile satellite network.
15. method according to claim 13 is characterized in that, the initial network state information of each node of described generation also comprises afterwards:
Network state information table and the shortest path first initial according to node, three layers of routing table of generation node, described three layers of routing table are used to towards connectionless data service the hop-by-hop routing forwarding are provided.
16. method according to claim 14 is characterized in that, described generation network state information also comprises:
Each node carries out the initialization of label distribution protocol conversation in the mobile satellite network, obtains label information table;
According to described label information table and three layers of routing table, obtain initially transmitting of mobile satellite multiprotocol label exchange network, described initially transmit to be used to towards connectionless data service the label exchange is provided.
17. method according to claim 13 is characterized in that, described network state information is adjusted and maintenance comprises:
When system belongs to discrete time point in the discrete time series time of running, utilize the static network topology information of described moment correspondence, original static topology information is upgraded.
18. method according to claim 15 is characterized in that, described network state information is adjusted and maintenance comprises:
When system belongs to discrete time point in the discrete time series time of running, utilize the static network topology information of described moment correspondence, original static topology information is upgraded;
When the dynamic link state information of described moment network changes, original dynamic link information is upgraded, and upgraded original three layers of routing table.
19. method according to claim 16 is characterized in that, described network state information is adjusted and maintenance comprises:
When system belongs to discrete time point in the discrete time series time of running, utilize the static network topology information of described moment correspondence, original static topology information is upgraded;
When the dynamic link state information of described moment network changes, original dynamic link information is upgraded, according to static state and the dynamic link topology information upgraded original three layers of routing table are upgraded;
When the state of node changes in the network, utilize dynamic link agreement and tag distribution protocol that original label information table is upgraded; According to label information table and three layers of routing table of upgrading, what obtain to upgrade initially transmits.
20. according to claim 11,12,14,15,16,17,18 or 19 described methods, it is characterized in that, describedly generate and safeguard that according to described network state information and the service requesting information obtained the path to this business information transmission comprises:
According to network state information and service request from user information calculations route shortest path and the optimal path that satisfies quality of service requirement and network traffic engineering;
To the communication validity and the continuation of generation pass are safeguarded.
21. method according to claim 20 is characterized in that, and is described according to also comprising after described network state information and service requesting information generation of having obtained and the path of maintenance to this business information transmission:
During sign off, the Internet resources that release way occupied.
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| CN101345651B (en) * | 2008-08-15 | 2010-08-11 | 南京邮电大学 | Satellite network protection method based on multi-protocol label exchange |
| CN101552782B (en) * | 2009-05-13 | 2012-05-23 | 清华大学 | Label inspection method in satellite MPLS network |
| CN102201855B (en) * | 2011-05-31 | 2013-11-20 | 西安空间无线电技术研究所 | Implementation method of satellite ATM (asynchronous transfer mode) PVC (permanent virtual circuit) multicasting |
| CN103312608B (en) * | 2013-04-25 | 2014-05-07 | 大连大学 | Satellite network routing algorithm based on traffic engineering |
| CN103648132B (en) * | 2013-12-30 | 2016-09-21 | 航天恒星科技有限公司 | A kind of satellite communication integration QoS safeguard system |
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| CN106789404B (en) * | 2016-11-29 | 2019-07-12 | 中国空间技术研究院 | The multimedia satellite communication semi-physical system of internet protocol-based |
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| CN112491460B (en) * | 2020-11-20 | 2022-07-01 | 中国电子科技集团公司第五十四研究所 | Satellite-borne multi-stage exchange device supporting multi-rate multi-protocol satellite communication service |
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