CN101527968B - Interaction method between space network and ground network, and communication protocol gateway - Google Patents
Interaction method between space network and ground network, and communication protocol gateway Download PDFInfo
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Abstract
The present invention relates to an interaction method between space network and ground network and a communication protocol gateway. The interaction method comprises the following steps: monitoring and receiving network transmission package by the communication protocol gateways which are connected with one another through a distribution mode based on internet through a local main channel; identifying the style of transmission network of network transmission package, allocating the network transmission packages to the space-ground subchannel, ground-space subchannel, space-space subchannel or ground-ground subchannel according to the style of transmission network; transmitting the network transmission packages after executing protocol conversion to the network transmission packages by the space-ground subchannel and ground-space subchannel; and transmitting the network transmission packages after processing the network transmission packages by the space-space subchannel and ground-ground subchannel. The communication protocol gateway comprises a main channel, the space-ground subchannel, the ground-space subchannel, the ground-ground subchannel and space-space subchannel. The invention adopts the communication protocol gateway for converting protocol. The convenient interaction between the space network and the ground network can be realized. Each network transmission package is processed with the channel form. The processing efficiency can be increased and the generation of data transmission bottleneck is prevented.
Description
Technical field
The present invention relates to the communication technology, relate in particular to exchange method and communication protocol gateway between a kind of spatial network and ground network.
Background technology
In recent years, mobile communications network carries out the transition to gradually by the heterogeneous network of multiple mutual covering to be formed, and various heterogeneous networks can be divided into two classes: spatial network and ground network.Spatial network is meant the network that adopts space communications technique to form, such as satellite network, and the mobile ad-hoc network of forming by the space link interconnection such as spacecrafts such as spaceship, space station, space shuttle, sky and space planes etc. again; Ground network is meant the network that adopts the ground communication technology to form, and the mobile ad-hoc network, the worldwide interoperability for microwave that constitute such as Cellular Networks, mobile host insert (Worldwide Interoperability for MicrowaveAccess; Hereinafter to be referred as: WiMAX) network and WLAN (Wireless Local AreaNetworks; Hereinafter to be referred as: WLAN) etc.
The development trend of mobile communications network be make diverse network from isolate intercommunication, from intercommunication to collaborative evolution, by internetwork collaborative, that separate, local advantageous ability and resource are carried out orderly integration, thereby finally make system have self-healing, a series of new functions such as management, discovery certainly, self planning, self-adjusting, self-optimizing certainly, intelligent more, realize user oriented freedom, transparent and seamless empty day ground integrated information network.
Continuous development along with spatial network communication and terrestrial interconnection network technology, the transmission of the intersection of information is on the increase between each network system of between inter-satellite, satellite and terrestrial network and ground, and this has just required, and a cover is unified, compatible, space communication agreement efficiently ensures.But at present the communication protocol of spatial network does not have unified design and construction, and this is especially obvious in communicating by letter between star ground and star.In order to adapt to the demand for development of space technology, nineteen eighty-two is by 8 domestic and international space mechanisms of the U.S., for example (the National Aeronautics and Space Administration of US National Aeronautics and Space Administration; Hereinafter to be referred as: NASA), (the European Space Agency of European Space Agency; Hereinafter to be referred as: ESA) etc. (the Consultative Committee for Space DataSystem of consultative committee for space data system has been set up in initiation; Hereinafter to be referred as: CCSDS), its target is to realize the data communication and the processing of end-to-end system.Over nearly 20 years, CCSDS has released technological package standard (recommendation), and wherein a part has been converted into the formal international standard of International Organization for Standardization, and CCSDS spatial data standard has also been brought into use in the satellite communication of China.And each Ground Communication System substantially all adopts the all-IP communication mode under Internet fast development, to support various application requirements, has realized the big unification of ground communication agreement.
At the transfer of data solution between spatial network and the ground network, NASA has carried out " OMNI (Operating Missions as a Nodes on the Internet) " project in recent years, its thought is that commercial internet (Internet) extended to spacecraft, realize whenever and wherever possible with most economical, convenient mode being that the ground end user provides with the all-IP end to end of its spacecraft and is connected, be in experimental stage at present.
But, there is following defective in above-mentioned solution in implementation process: satellite system is under the situation of the various complexity of task, shortage unified standard, often adopt the communication protocol of stand-alone development separately, in a short time all spatial networks are updated to that feasibility based on IP principle transmission data is low, cost is high, can consume a large amount of fund and research effort, and can not combine with ground network well.
The eighties in 20th century, CCSDS has formulated bag telemetry protocol and remote control series standard in succession.In order to satisfy such as senior communicating requirements in the rail system such as international space stations, CCSDS expands above two standards (COS), has proposed senior to rail system standard (AOS).Ground network has two kinds of optional network access modes current: connection-oriented asynchronous transfer mode (Asynchronous Transfer Mode; Hereinafter to be referred as: ATM) with connectionless IP.Conventional gateway at above-mentioned particular network system design, realizes the business function that certain is specific mostly, is difficult for expanding to other network systems.As: AOS that CCSDS formulates and the conversion between the ATM agreement; By protocol of I P multicast protocol, how the multicast information of ground network is converted to the multicast information of satellite network based on no link road; Spacecraft is adopted fixing distributing IP, carry out the conversion etc. between AOS and the IP agreement.Therefore, the concertedness of conventional gateway is poor, and the intra-gateway structure often degree of coupling is higher, easily becomes the bottleneck of Large Volume Data transmission.
Summary of the invention
The purpose of this invention is to provide exchange method and communication protocol gateway between a kind of spatial network and ground network, with the transfer of data between efficient implementation space network and the ground network.
For achieving the above object, the invention provides the exchange method between a kind of spatial network and ground network, comprising:
For achieving the above object, the present invention also provides a kind of communication protocol gateway, comprise main channel, vacant lot subchannel, empty subchannel, ground subchannel and absolutely empty subchannel, wherein
Described main channel comprises:
The monitoring reception module is used for monitoring and receive network transmission package based on the internet;
Transmission network classification identification module is used to discern the transmission network classification of described network transmission package;
Distribution module, be used for according to the transmission network classification that recognizes with network transmission package be sent to described vacant lot subchannel, empty subchannel, absolutely empty subchannel or ground, ground subchannel,
The empty subchannel of described vacant lot subchannel and ground comprises respectively:
Decapsulation module is used for carrying out the decapsulation operation according to the source network agreement of described network transmission package, obtains transmission information;
Protocol conversion module is used for described network transmission package is carried out protocol conversion;
Package module is used for carrying out encapsulation operation according to the next-hop network agreement of described network transmission package, fills in the new network transmission package of encapsulation according to described transmission information and next-hop network address;
First sending module is used to send new network transmission package to corresponding network, and described ground ground subchannel and absolutely empty subchannel comprise respectively:
Processing module is used for described network transmission package is handled;
Second sending module is used to send network transmission package after the processing to corresponding network.
By above technical scheme as can be known, the present invention adopts communication protocol gateway to carry out protocol conversion, can the implementation space network and ground network between end-to-end mutual; Communication protocol gateway adopts channel form to handle each network transmission package, can improve treatment effeciency, avoids producing the transfer of data bottleneck; Functional module in each subchannel is independent, and order is operated network transmission package, forms stratification, modular processing, helps improving treatment effeciency.
Description of drawings
Fig. 1 for the exchange method between spatial network of the present invention and ground network based on network architecture diagram;
Fig. 2 is the structural representation of the strategic server of network soft switch center among Fig. 1;
Fig. 3 is spatial network that first embodiment of the invention provided and the exchange method flow chart between ground network;
Fig. 4 is spatial network that second embodiment of the invention provided and the exchange method flow chart between ground network;
Fig. 5 is Network Transmission packet transmission path schematic diagram in spatial network that second embodiment of the invention provided and the exchange method between ground network;
Fig. 6 be in the second embodiment of the invention based on the communication protocol gateway structural representation;
Fig. 7 is the flow chart of transmission network connection request in spatial network that third embodiment of the invention provided and the exchange method between ground network;
Fig. 8 is the flow chart of transmission network connection response in spatial network that third embodiment of the invention provided and the exchange method between ground network;
Fig. 9 is Network Transmission packet transmission path schematic diagram in spatial network that third embodiment of the invention provided and the exchange method between ground network;
Figure 10 is spatial network that fourth embodiment of the invention provided and the exchange method flow chart between ground network;
Figure 11 is the schematic diagram of a kind of frame structure of ground network transmission package of being adopted in the fourth embodiment of the invention;
Figure 12 is the schematic diagram of a kind of frame structure of spatial network remote control bag of being adopted in the fourth embodiment of the invention;
Figure 13 is the schematic diagram of a kind of frame structure of spatial network remote measurement bag of being adopted in the fourth embodiment of the invention;
Figure 14 is the structural representation of main channel in the communication protocol gateway that sixth embodiment of the invention provided;
Figure 15 is the structural representation of the empty subchannel of vacant lot subchannel in the communication protocol gateway that sixth embodiment of the invention provided or ground;
Figure 16 is the structural representation of absolutely empty subchannel in the communication protocol gateway that sixth embodiment of the invention provided or ground, ground subchannel.
Embodiment
Fig. 1 for the exchange method between spatial network of the present invention and ground network based on network architecture diagram, as shown in Figure 1, communication network can be divided into a plurality of zones according to features such as region or administrative areas, regional A, area B, zone C, region D and area E etc. for example shown in Figure 1.In each zone, all covered by multiple different network, for example regional A can be covered by WiMAX network, WLAN, satellite network (Satelite) and Cellular Networks networks such as (Cellular).In the above-mentioned network architecture, be laid with a plurality of network soft switch center (Network Soft-switch Center; Hereinafter to be referred as: NSC) 1, for example NSC A, NSC B, NSC C, NSC D and NSC E etc., each NSC 1 realizes interconnected by Internet based on the IP agreement, constitute global network soft switch center (the Global NetworkSoft-switch Centers system of system; Hereinafter to be referred as: GNSC system).Adopted static routing and dynamic routing (the Cooperative Static and Dynamic Routing that combines between each NSC 1; Hereinafter to be referred as: routing mode CSDR), adopt static routing (Staticrouting) between the promptly key NSC 1, represent with solid line among Fig. 1; Adopt the mode of dynamic routing (Dynamicrouting) to connect between the non-key NSC 1, be represented by dotted lines among Fig. 1.Thereby raise the efficiency, reduce time delay, strengthen network cooperating.Terminal in each zone is connected to corresponding NSC 1 by certain network in this zone.NSC 1 is not limited to corresponding one by one with certain zone or certain network, can be forms such as many-many correspondence.The above-mentioned network architecture can realize distributed control, and each NSC 1 can be responsible for the network optimization of corresponding region and communicate by letter with the interregional network cooperating of this zone and other.This network architecture has higher flexibility, can have the node of Network Management Function with the distributed way expansion according to the actual deployment situation of network.
Fig. 2 is the structural representation of the strategic server of network soft switch center among Fig. 1.A strategic server is set among each NSC 1 at least, and it is distributed controlling decision center, coordinates to link up in core control aspect and transmission carrying aspect.Strategic server can comprise following functional module: user access control (User Access Control; Hereinafter to be referred as: UAC) module 8, subnet access control (Sub-Network Access Control; Hereinafter to be referred as: SNAC) module 7, network state are estimated (Network Condition Estimation; Hereinafter to be referred as: NCE) module 6, control strategy (ControlStrategy Set; Hereinafter to be referred as: CSS) module 5, regional internal network connect (Intra-connection) module 3 and interlocal network connection (Inter-connection) module 4.Wherein, CSS module 5 is used for selecting best idle network according to network operation situation for the user, and promptly the route of data that guides user is transmitted determines to implement the link paths that regional internal network connects or the interzone network connects.
In carrying out research process of the present invention, the inventor finds: the air-air link of aeronautical experiment and ground communication use and Air-Ground link certainly will still adopt the CCSDS standard agreement in following considerable time in the world, therefore carry out protocol conversion, promptly gateway technique research to come without hindrance between implementation space network and ground network to communicate by letter be very necessary and have far-reaching.The present invention based on the above-mentioned network architecture in also introduced communication protocol gateway (GateWay; Hereinafter to be referred as: GW) 2, embed among the Internet with distributed way, link to each other respectively with NSC 1, be responsible in the zone and/or interregional connection diverse network, realize internetwork end-to-end alternately, especially between spatial network and the ground network alternately.Communication protocol gateway 2 can be connected one to one with NSC 1, also can be many-one or many-one relationship, and this can design according to the needs of service traffics.Communication protocol gateway 2 can be a network element that is independent of NSC 1, also can be the module that is integrated among the NSC 1.Each communication protocol gateway 2 can interknit by the routing mode of NSC 1, also can contact directly (not shown complete access path among Fig. 1) by Internet mutually.Exchange method between spatial network of the present invention and ground network is mainly to be realized by communication protocol gateway 2, also in conjunction with the accompanying drawings the present invention is described in further detail below by specific embodiment.
First embodiment
Fig. 3 is spatial network that first embodiment of the invention provided and the exchange method flow chart between ground network.The method of present embodiment can be realized that by communication protocol gateway concrete steps are as follows based on the network architecture shown in Figure 1:
The transmission network classification of step 200, communication protocol gateway recognition network transmission package, when recognizing the transmission network classification when being vacant lot transmission or the empty transmission in ground, execution in step 300 is absolutely empty transmission or when transmission ground ground when recognizing the transmission network classification, execution in step 400;
Adopt the technical scheme of present embodiment, realize communication based on passage in the communication protocol gateway, monitor and receive network transmission package by the main channel, then according to the classification of network transmission package it being dispensed to subchannel handles, can to vacant lot, other network transmission package of empty class carry out protocol conversion, realized without hindrance mutual between spatial network and the ground network, and it is less to the improvement of existing space network and ground network, especially need not adjust present spatial network based on the CCSDS standard, so feasibility is good, cost is low.In addition, each subchannel can walk abreast to vacant lot, empty, ground or absolutely empty network transmission package handle, treatment effeciency improves, and has avoided gateway to become the bottleneck of Network Transmission.
Second embodiment
Fig. 4 is spatial network that second embodiment of the invention provided and the exchange method flow chart between ground network.The method of present embodiment still can be based on the network architecture shown in Figure 1, is cooperated with NSC by communication protocol gateway and realizes.Fig. 5 there is shown two kinds of similar transmission situations for Network Transmission packet transmission path schematic diagram in spatial network that second embodiment of the invention provided and the exchange method between ground network.Wherein a kind of situation of transmitting is specially the terminal that NSC B is responsible in the satellite network in area and sends request msg by NSC A and corresponding GW A to the terminal that NSC A is responsible in the terrestrial cellular networks in area, and the terminal in satellite network after receiving request msg of the terminal in the cellular network is returned the process of response data.Second kind of transmission situation is specially the terminal that NSC A is responsible in the ground WiMAX network in area and sends request msg by NSC B and corresponding GW B to the terminal that NSC B is responsible in the satellite network in area, and the terminal in the WiMAX network after receiving request msg of the terminal in the satellite network is returned the process of response data.Fig. 5 mid point is scribed ss the transmit path of request msg, and dotted line is the transmit path of response data, and request msg and response data all belong to a kind of of network transmission package.Be example with second kind of situation below, describe concrete steps in detail.
Concrete steps are as follows:
The step 100 of the foregoing description is specifically as follows:
On the basis of such scheme, the setting weighted frequency that the communication protocol gateway monitoring is adopted is to adjust in snoop procedure after initialization, and is concrete, before above-mentioned steps 130, can also comprise the steps:
Step D10, statistics setting-up time
The interior quantity Q that arrives the network transmission package of GW B, wherein, kf is for setting weighted frequency, and f is the constant greater than zero, and k is the frequency change coefficient, and 0＜k
1≤ k≤k
2, k
1And k
2Be the constant of setting;
Step D20, at first want initialization frequency change coefficient k, judge whether satisfy service traffics velocity variations requirement, service traffics speed promptly is if monitoring the setting weighted frequency kf that adopts
Arrive the quantity Q of the network transmission package of this gateway in time, then according to formula (1) calculated flow rate and the ratio r of setting weighted frequency:
And comparison ratio r and minimum threshold r
1With maximum threshold r
2, if r
1≤ r≤r
2, then expression setting weighted frequency satisfies the requirement of service traffics velocity variations, execution in step 130, otherwise, as r＜r
1Or r＞r
2The time execution in step D30;
Step D30, at 0＜k
1≤ k≤k
2Scope in the variation coefficient k that adjusts frequency, and recomputate ratio r according to adjusted frequency change coefficient k;
If step D40, identification ratio r are r
1≤ r≤r
2, then get adjusted frequency change coefficient k, this time adjust and can carry out repeatedly, until r
1≤ r≤r
2, if at 0＜k
1≤ k≤k
2Be r＜r all the time in the scope
1, promptly
Or remain behind the adjustment set point number
Then set k=k
1, if at 0＜k
1≤ k≤k
2Be r＞r all the time in the scope
2, promptly
Or remain behind the adjustment set point number
Then set k=k
2
Step D50, according to adjusted frequency change coefficient k new settings weighted frequency kf more, and execution in step 130.Adopt such scheme, communication protocol gateway can change to adjust according to service traffics sets weighted frequency, so that in time obtain network transmission package, and waste bandwidth resource not.Specifically can maximum and minimum value that set weighted frequency be limited respectively, the speed according to the increase or the minimizing of service traffics correspondingly improves or reduces and periodically monitor the variation coefficient that frequency increases or reduces.
Before execution in step 200, can carry out following step:
The transmission region classification of steps A 10, GW B recognition network transmission package, when recognizing the transmission region classification when being interregional transmission, execution in step A20, when recognizing the transmission region classification when transmitting in for the zone, execution in step A30, identification transmission region class method for distinguishing can be to resolve to obtain last one and jump the network address and next-hop network address from network transmission package, discerns this network transmission package in view of the above and be to transmit in the zone or transfer to interregional transmission the one's respective area from other zones.Network transmission package is after forwarded hop-by-hop, and each is jumped the network address and can be carried among the network transmission package;
Steps A 20, GW B are sent to local interregional subchannel according to the transmission region classification with network transmission package and handle, and skips steps A30 carries out subsequent step;
Steps A 30, GW B are sent to the interior subchannel in local zone according to the transmission region classification with network transmission package and handle, and carry out subsequent step.
Step 200 specifically can comprise the steps:
After this, can also comprise satellite network will be in response the network transmission package of data return the process of terminal in the WiMAX network.Concrete, satellite network can send to network transmission package NSC B, and NSC B can distribute to GW B and handle, and GW B does network transmission package to re-send to the WiMAX network terminal after the protocol conversion, as shown in Figure 5.The network transmission package of Chuan Diing is that hop-by-hop sends in the manner described above, the bang path of request msg and the bang path of response data can be identical or different, also the network transmission package of data in response can be sent to NSC A as: satellite network, NSC A can distribute to GW A and handle, and GW A does network transmission package to re-send to the WiMAX network terminal after the protocol conversion.In transmittance process, NSC can jump the path according to network operation situation to next in real time and be optimized.Usually, can transmit by the way real-time require low, to the insensitive data of time delay.
In the present embodiment, the channel mode that is based on communication protocol gateway realizes communication, Fig. 6 be in the second embodiment of the invention based on the communication protocol gateway structural representation, as shown in Figure 6, communication protocol gateway comprises main channel 20, the main channel is provided with subchannel 22 in interregional subchannel 21 and the zone for 20 times, interregional subchannel be provided with for 21 times vacant lot subchannel 211, empty subchannel 212, ground subchannel 213 and absolutely empty subchannel 214, the zone in subchannel be provided with for 22 times vacant lot subchannel 221, empty subchannel 222, ground subchannel 223 and absolutely empty subchannel 224.Various types of other Network Transmission wraps in parallel asynchronous process in the subchannel, and each Network Transmission wraps in the subchannel in the mode of process one by one and handles.In above-mentioned steps 300 or step 400, after network transmission package is transferred into subchannel, also comprise step B10, communication protocol gateway can be provided with service priority for network transmission package, to handle the process order of each network transmission package in the indication subchannel.
Above-mentioned steps A10～A30 not only can carry out before step 200, also can be in step 400, before the execution in step 500, execution in step A10～A30, then discern the transmission network classification earlier, discern the transmission region classification again, the relation that is provided with of corresponding adjustment subchannel gets final product.
The 3rd embodiment
Fig. 7 is the flow chart of transmission network connection request in spatial network that third embodiment of the invention provided and the exchange method between ground network, and Fig. 8 is the flow chart of transmission network connection response in spatial network that third embodiment of the invention provided and the exchange method between ground network.Present embodiment can above-mentioned first embodiment be the basis, still can be based on the network architecture shown in Figure 1, and cooperate with NSC by communication protocol gateway and to realize.Fig. 9 is Network Transmission packet transmission path schematic diagram in spatial network that third embodiment of the invention provided and the exchange method between ground network, be specially the demanding data service of terminal interaction real-time in ground network and the spatial network in the present embodiment, for example voice call etc.Specifically comprise the steps:
Step e 1, be the network connecting request that distributed interconnected NSC receiving terminal is initiated based on Internet, network connecting request is used to set up link between networks, also is a kind of of network transmission package;
Step e 4, communication protocol gateway are discerned the transmission network classification of this network connecting request, when recognizing the transmission network classification when being vacant lot transmission or the empty transmission in ground, execution in step E5 is absolutely empty transmission or when transmission ground ground when recognizing the transmission network classification, execution in step E6;
Step e 5, communication protocol gateway are sent to the empty subchannel of local vacant lot subchannel or ground according to the transmission network classification with network connecting request, and carry out protocol conversion, then execution in step E7;
Step e 6, communication protocol gateway are handled absolutely empty subchannel or ground, ground subchannel that network connecting request is sent to this locality according to the transmission network classification, and execution in step E7;
Step e 7, communication protocol gateway are sent to map network according to the next-hop network address with the network connecting request in the subchannel.
Repeating above-mentioned steps E1～E7, is the purpose network address until the next-hop network address, and promptly network connecting request is sent to the purpose network.Present embodiment for the sake of simplicity, first next-hop network is the purpose network, then the terminal in the purpose network needs the network connection response is fed back to the terminal of initiating network connecting request, promptly carries out following step:
The purpose network of step e 8, network connecting request is at this moment as source network, be the network connection response that distributed interconnected NSC receiving terminal is initiated based on Internet, the network connection response also is a kind of of network transmission package, wherein carries the hop-by-hop network address of network connecting request transmission path;
Step e 9, this NSC determine next-hop network address and the gateway address that connects this next-hop network according to the hop-by-hop network address in the network connection response, and it is added in the network connection response;
Step e 10, be distributed interconnected communication protocol gateway, periodically monitor one or more NSC that self connected, when listening to gateway address, receive the network connection response by local main channel for this machine address based on Internet;
Step e 11, communication protocol gateway are discerned the transmission network classification of this network connection response, when recognizing the transmission network classification when being vacant lot transmission or the empty transmission in ground, execution in step E12 is absolutely empty transmission or when transmission ground ground when recognizing the transmission network classification, execution in step E13;
Step e 12, communication protocol gateway are sent to the empty subchannel of local vacant lot subchannel or ground according to the transmission network classification with the network connection response, and carry out protocol conversion, then execution in step E14;
Step e 13, communication protocol gateway are handled absolutely empty subchannel or ground, ground subchannel that the network connection response is sent to this locality according to the transmission network classification, and execution in step E14;
Step e 14, communication protocol gateway are sent to map network according to the next-hop network address with the network connection response in the subchannel.
Repeat above-mentioned steps E8～E14, until the network connection response is sent to the purpose network.After the transmission of network connecting request and network connection response, can set up a network access path.Carry the hop-by-hop network address in the network connection response, terminal can transfer to the purpose network through each communication protocol gateway according to the demanding packet of the real-time that the hop-by-hop network address will be transmitted, and needn't pass through the path optimization of NSC again.
Adopting technique scheme to go for to real-time demanding data service transmits, network connecting request, network connection response and business data packet all can be called network transmission package, are sent to next-hop network by communication protocol gateway through after the protocol conversion.Communication protocol gateway adopts channel form to handle each network transmission package, can improve treatment effeciency, avoids communication protocol gateway to become the bottleneck of transfer of data.
The 4th embodiment
Figure 10 is spatial network that fourth embodiment of the invention provided and the exchange method flow chart between ground network.Present embodiment can above-mentioned arbitrary embodiment be the basis, specifically is in the step 300, and communication protocol gateway is sent to the empty subchannel of local vacant lot subchannel or ground according to the transmission network classification with network transmission package, and carries out protocol conversion and comprise the steps:
The bag type of step 303, communication protocol gateway recognition network transmission package, when recognizing to signal packet, execution in step 304, when recognizing to packet, then execution in step 305;
In technique scheme, between step 305 and step 306, also comprise:
Step C1, communication protocol gateway judge whether to carry out operation of relays, promptly judge when this network transmission package is sent to the customer objective network, whether need to be relayed to other networks, if, then next-hop network is a junction network, execution in step C2, otherwise execution in step 306;
Step C2, communication protocol gateway can be according to next-hop network Address Recognition next-hop networks, promptly determine the communication protocol gateway of this junction network correspondence, this communication protocol gateway of determining is the communication protocol gateway that connects through needing behind the junction network, with the gateway address of this communication protocol gateway as the relay address for the treatment of that specifically will be relayed to, so that follow-up filling in is encapsulated into network transmission package, then execution in step 306, to carry out the junction network transmission.
In technique scheme, judge decoding when unsuccessful when communication protocol gateway in the step 302, then carry out following operation:
If this communication protocol gateway occurs unusual, then start the backup communication protocol gateway, continue corresponding work, and attempt solving the problem of former communication protocol gateway operation irregularity.
Through after the above-mentioned processing, after subchannel is sent to map network with network transmission package, can also judge whether further that upwards a transmitting terminal of jumping in the network returns response signal, if then return response signal.
In above-mentioned steps 305,306, the empty subchannel in ground is different with the protocol conversion process of vacant lot subchannel.Concrete, the ground performed encapsulation operation of empty subchannel specifically comprises the steps:
Step 305a, communication protocol gateway carry out the decapsulation operation according to the source network agreement of network transmission package, Figure 11 is the schematic diagram of a kind of frame structure of ground network transmission package of being adopted in the fourth embodiment of the invention, Figure 12 is the schematic diagram of a kind of frame structure of spatial network remote control bag of being adopted in the fourth embodiment of the invention, and Figure 13 is the schematic diagram of a kind of frame structure of spatial network remote measurement bag of being adopted in the fourth embodiment of the invention.Source network is a kind of in the ground network, and the respective protocol of base area torus network is resolved the transmission information of obtaining in the ground network transmission package, promptly resolves to obtain ground network and transmit frame head, IP head, transmission protocol header and purpose user profile head and source data etc.Ground network transmits media interviews control (the Medium Access Control that frame head can comprise ground physical network source host and destination host; Hereinafter to be referred as MAC) address and type, postamble is a check word, can comprise source host and destination host IP address, type, life cycle etc. in the IP head, and transmission protocol header can comprise source host and destination host port numbers, serial number, affirmation number, check word etc.Purpose user profile head can comprise purpose network identity and application process, is made up of three parts: junction network, purpose network, secondary information header; Junction network is represented to need this spatial network of relaying if network transmission package arrives the purpose user terminal, then fills in the junction network sign, otherwise can omit this; The purpose network is the network at purpose user terminal place; Secondary information header is used for describing the information of purpose user terminal correlated characteristic, as: purpose user name, address etc., and the type of data that sign is transmitted; If user data of no use needs to send when sending transmission frame, represent the transmission frame of empty data to be sent out with a specific identifier so.
Step C1a, communication protocol gateway judge whether this spatial network of relaying according to the purpose network identity in the purpose user profile head, if then next-hop network is a junction network, and execution in step C2a, otherwise execution in step 306a;
Step C2a, communication protocol gateway determine the address of the communication protocol gateway of this junction network correspondence according to the next-hop network address, as treating relay address so that fill in and be encapsulated into network transmission package, execution in step 306a then;
Step 306a, communication protocol gateway are created a new network transmission package, according to procotol between next gap of legacy network transmission package, according to transmission information and relevant next-hop address information, fill in and are encapsulated into new spatial network transmission package.Spatial network transmits frame head, remote control source bag section top guide and a remote measurement source bag section top guide, adopted the frame format mode of CCSDS standard agreement, can fill in concrete relevant information as main channel sign, virtual channel identification and signaling territory etc. according to different spatial networks.The purpose User Data Header is made up of three parts: junction network, purpose network, secondary data head.Concrete implication and purpose user profile are similar.Source data length is variable.The error control territory is optionally, uses the coding with error correcting capability to protect the key message of transmission frame.When spatial network is exactly the purpose network, junction network in the purpose User Data Header, the purpose network all can omit, and fills in the transmission frame head of the remote measurement bag of spatial network communication protocol correspondence, transmission frame head, the source bag section top guide that section top guide and remote control bag are wrapped in the source according to spatial network and purpose station address information; When if spatial network is junction network, the purpose network of purpose user profile head is inserted the purpose network site of purpose User Data Header, want this spatial network of relaying to insert the junction network home position of purpose User Data Header, and according to this relaying spatial network and afterwards transmission frame head, the source bag section top guide that will fill in transmission frame head, source bag section top guide and the remote control bag of the remote measurement bag of spatial network communication protocol correspondence through the address information of gateway; Whether operation of relays is carried out, and the secondary information header of purpose user profile head is inserted the secondary data head of the purpose User Data Header of spatial network transmission frame, forms new spatial network transmission package by the encapsulation of transmission information such as source data again.
The processing procedure of vacant lot subchannel is similar with the empty subchannel in ground, gateway is resolved the transmission information of obtaining in the spatial network transmission package according to the respective protocol of spatial network, promptly resolves transmission frame head, source bag section top guide and the source data etc. of transmission frame head, source bag section top guide, purpose User Data Header and the remote control bag of the remote measurement bag that obtains spatial network communication protocol correspondence.When ground network is exactly the purpose network, the junction network in the purpose user profile head, the purpose network all can omit, and base area torus network and purpose station address information are filled in transmission frame head, IP head, the transmission protocol header of ground network agreement correspondence; When if ground network is junction network, the purpose network of purpose User Data Header is inserted the purpose network site of purpose user profile head, want this ground network of relaying to insert the junction network home position of purpose user profile head, and by this relaying ground network and afterwards to fill in transmission frame head, IP head, the transmission protocol header of ground network communication protocol correspondence through the address information of gateway; Whether operation of relays is carried out, and the secondary data head of purpose User Data Header is inserted the secondary information header of the purpose user profile head of ground network transmission frame, forms new ground network transmission package by the encapsulation of transmission information such as source data again.
The technical scheme of various embodiments of the present invention makes between satellite network, WiMAX network, Cellular Networks and WLAN that mutual communication is connected end to end.Spatial network uses more still CCSDS standard agreement at present, can realize the communication that is connected to each other of IP communication protocol between WiMAX network, Cellular and the WLAN, communication protocol commonly used has transmission control protocol/internet protocol (Transmission ControlProtocol/Internet Protocol; Hereinafter to be referred as: TCP/IP), User Datagram Protoco (UDP)/IP (User Datagram Protocol/IP; Hereinafter to be referred as: UDP/IP) etc.
Adopt the technical scheme of various embodiments of the present invention, can distinguish the configuration protocol gateway in each different regions according to the distributed network group-network construction, and communication protocol gateway is embedded among the Internet.The diverse network that each communication protocol gateway adopts stratification, modularized design to be responsible for corresponding area inside connect and outside LAN to the connection request of this area's network, communicate with channel mode, can be the passage name in the mode of numbering.Can increase or reduce the subchannel quantity in the communication protocol gateway according to concrete performance, for example can comprise ground, a plurality of ground subchannel, the empty subchannel in a plurality of ground etc.Each subchannel can be responsible for the one or more networks of user to this area and connect communication, for example, for ground, ground subchannel, the form of ground network may be cellular network, WiMAX network or WLAN etc., and then the ground subchannel can be handled from Different Ground network of network transmission package.
In the communication protocol gateway channel-type process user connection request communication process in the embodiment of the invention, adopt the mode of the parallel asynchronous working of multistage process, be specially: the one-level monitor process, secondary connection request distribution process, three grades of conversion process based on ground network agreement and spatial network agreement, level Four error control process can also be arranged, promptly before each subchannel is sent to next-hop network with network transmission package, handle subchannel by debugging again, encode according to the coded system of network transmission package and realize error control.
The 5th embodiment
Spatial network that fifth embodiment of the invention provided and the exchange method between ground network can be the basis by above-mentioned arbitrary embodiment, the further dynamic controlling mechanism of implementation process half in each subchannel of communication protocol gateway, each network transmission package that subchannel is handled in step 300 and the step 400 is a process.Process can be set to three states, i.e. operating state, busy condition and idle condition at least.In running order process can receive network transmission package and handle, and the process that is in busy condition is handled network transmission package and can not be received new network transmission package, and the process that is in idle condition is not worked and do not received network transmission package yet.Each subchannel can dynamically arrange state of a process according to the quantity of the network transmission package of current reception.Subchannel carries out process control specifically can carry out following operation:
The quantity of the received network transmission package that is untreated of step F 1, subchannel statistics self and add up each state of a process, under normal condition or the initial situation, the process that some can be set is in running order, and its quantity is Pn;
Step F 4, when the quantity of judging the operating state process when subchannel reaches and sets threshold value, the process of one or more operating states is set to idle condition, or deletion to set quantity be the process of PL.
The order of above-mentioned steps F2～F4 can be exchanged, and be not limited to above-mentioned decision operation, can adopt multiple condition setting to finish dynamic control, control each state of a process as required at any time, satisfy the processing requirements of network transmission package number of processes and state.
The 6th embodiment
The communication protocol gateway that sixth embodiment of the invention provided specifically comprise main channel, vacant lot subchannel, empty subchannel, ground subchannel and absolutely empty subchannel, further can comprise subchannel in interregional subchannel and the zone, structural representation can be referring to shown in Figure 6.Wherein, as shown in figure 14, the main channel comprises: monitoring reception module 1401 is used for monitoring and receive network transmission package based on the internet from each network or NSC; Transmission network classification identification module 1402 is used for the transmission network classification of recognition network transmission package; Distribution module 1403, be used for according to the transmission network classification that recognizes with network transmission package be sent to the vacant lot subchannel, empty subchannel, absolutely empty subchannel or ground, ground subchannel.As shown in figure 15, the similar of the empty subchannel of vacant lot subchannel and ground comprises respectively: decapsulation module 1501, be used for carrying out the decapsulation operation according to the source network agreement of network transmission package, and obtain transmission information; Protocol conversion module 1502 is used for the network transmission package of communicating by letter between vacant lot or the earth-to-space link is carried out protocol conversion; Package module 1503 is used for carrying out encapsulation operation according to the next-hop network agreement of network transmission package, fills in the new network transmission package of encapsulation according to transmission information and next-hop network address; First sending module 1504 is used to send new network transmission package to corresponding network.As shown in figure 16, the similar of ground, ground subchannel and absolutely empty subchannel comprises respectively: processing module 1601 is used for network transmission package is handled the protocol conversion process between the ground network for example, debugging processing etc.; Second sending module 1602 is used to send network transmission package after the processing to corresponding network.
Communication protocol gateway of the present invention can be carried out the technical scheme of the arbitrary embodiment of exchange method between spatial network of the present invention and ground network, have the corresponding function module of carrying out aforesaid operations, mistake processing module, retransmission process module etc. can also further be set.Because system resource is limited, must consider that also a plurality of tasks are divided into several modules to be handled even a plurality of coordinations that comprise in the subchannel are working properly.The present invention adopts stratification, and modular design architecture makes each module independent and general as much as possible, has autgmentability well.Mode with passage communicates, and can improve communication efficiency, reduces between the network to connect communication delay end to end.Simultaneously for the wait time delay that reduces consumer process with avoid resource waste, consider user's demand possibility change at random, priority can be set serve, and introduce the dynamically performance of controlling mechanism raising gateway of multi-process asynchronous parallel processing mode and half, solve bottleneck problem.But being connected end to end between the present invention implementation space network and ground network improving communication efficiency, reduces access delay, conserve system resources, and maintaining system safety and upgradability aspect can obtain the better balance performance energy.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be finished by the relevant hardware of program command, aforesaid program can be stored in the computer read/write memory medium, this program is carried out the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the exchange method between spatial network and ground network is characterized in that, comprising:
Step 100, be distributed interconnected communication protocol gateway, monitor and receive network transmission package by local main channel based on the internet;
Step 200, described communication protocol gateway are discerned the transmission network classification of described network transmission package, when recognizing described transmission network classification when being vacant lot transmission or the empty transmission in ground, execution in step 300 is absolutely empty transmission or when transmission ground ground when recognizing described transmission network classification, execution in step 400;
Step 300, described communication protocol gateway are sent to the empty subchannel of local vacant lot subchannel or ground according to described transmission network classification with described network transmission package, and carry out protocol conversion, and then execution in step 500;
Step 400, described communication protocol gateway are handled absolutely empty subchannel or ground, ground subchannel that described network transmission package is sent to this locality according to described transmission network classification, and execution in step 500;
Step 500, described communication protocol gateway are sent to map network with the network transmission package in the subchannel.
2. the exchange method between spatial network according to claim 1 and ground network is characterized in that, described step 100 specifically comprises:
Step 110, be distributed interconnected network soft switch center based on the internet and receive the network transmission package that user terminal is initiated;
Step 120, described network soft switch center are determined the next-hop network address of described network transmission package according to the purpose network address in network operation situation and the described network transmission package, and described next-hop network address is added in the described network transmission package;
Step 130, described communication protocol gateway adopt the setting weighted frequency periodically to monitor described network soft switch center, and receive described network transmission package by the main channel.
3. the exchange method between spatial network according to claim 2 and ground network is characterized in that, before the described step 130, also comprises:
Step D10, statistics setting-up time
The interior quantity Q that arrives the network transmission package of described communication protocol gateway, wherein, kf is for setting weighted frequency, and f is the constant greater than zero, and k is the frequency change coefficient, and 0＜k
1≤ k≤k
2, k
1And k
2Be the constant of setting;
Step D20, according to formula (1) calculated flow rate and the ratio r of setting weighted frequency:
And comparison ratio r and minimum threshold r
1With maximum threshold r
2, if r
1≤ r≤r
2, then execution in step 130, otherwise execution in step D30;
Step D30, at 0＜k
1≤ k≤k
2Scope in adjust described frequency change coefficient k, and recomputate described ratio r according to adjusted described frequency change coefficient k;
If step D40, identification ratio r are r
1≤ r≤r
2, then get adjusted frequency change coefficient k, if r＜r
1, then set k=k
1, if r＞r
2, then set k=k
2
Step D50, upgrade described setting weighted frequency kf according to adjusted frequency change coefficient k, and execution in step 130.
4. the exchange method between spatial network according to claim 2 and ground network is characterized in that, the transmission network classification that communication protocol gateway is discerned described network transmission package in the described step 200 specifically comprises:
Step 210, described communication protocol gateway are resolved from described network transmission package and are obtained the last jumping network address and a next-hop network address;
Step 220, described communication protocol gateway are according to the described last one transmission network classification of jumping the network address and the described network transmission package of next-hop network Address Recognition.
5. the exchange method between spatial network according to claim 2 and ground network is characterized in that, before described step 200, or before the execution in step 500, also comprises in described step 400:
Steps A 10, communication protocol gateway are discerned the transmission region classification of described network transmission package, when recognizing described transmission region classification when being interregional transmission, execution in step A20, when recognizing described transmission region classification when transmitting in for the zone, execution in step A30, described zone is that communication network obtains according to region or administrative division branch;
Steps A 20, communication protocol gateway are sent to local interregional subchannel according to described transmission region classification with described network transmission package and handle, and skips steps A30 carries out subsequent step;
Steps A 30, communication protocol gateway are sent to the interior subchannel in local zone according to described transmission region classification with described network transmission package and handle, and carry out subsequent step.
6. the exchange method between spatial network according to claim 1 and ground network is characterized in that, in described step 300 or step 400, after described network transmission package is transferred into subchannel, also comprises:
Step B10, described communication protocol gateway are that described network transmission package is provided with service priority, handle the order of described network transmission package with the indication subchannel.
7. the exchange method between spatial network according to claim 1 and ground network, it is characterized in that, in the step 300, communication protocol gateway is sent to the empty subchannel of local vacant lot subchannel or ground according to described transmission network classification with described network transmission package, and carries out protocol conversion and specifically comprise:
Step 301, described communication protocol gateway carry out decode operation to described network transmission package;
Step 302, described communication protocol gateway judge whether to decode successfully, if then execution in step 303;
Step 303, described communication protocol gateway are discerned the bag type of described network transmission package, when recognizing to signal packet, and execution in step 304, when recognizing to packet, then execution in step 305;
Step 304, described communication protocol gateway judge whether the signal type of described signal packet is the ending request signal that is used for finishing at current communication protocol gateway application process, if, then finish this operation, if not, then execution in step 305;
Step 305, described communication protocol gateway carry out the decapsulation operation according to the source network agreement of described network transmission package, resolve the transmission information of obtaining wherein;
Step 306, described communication protocol gateway are created a new network transmission package, according to the next-hop network agreement of legacy network transmission package, fill in the described new network transmission package of encapsulation according to described transmission information and next-hop network address;
Step 307, described communication protocol gateway carry out encoding operation to encapsulating the new network transmission package in back, and execution in step 500.
8. the exchange method between spatial network according to claim 7 and ground network is characterized in that, judges decoding when unsuccessful when communication protocol gateway in the step 302, also comprises:
Step 308, described communication protocol gateway judge whether to reach overtime threshold value, if not, then send the repeat requests signal, and return execution in step 100, if then execution in step 309;
Step 309, described communication protocol gateway abandon described network transmission package, and finish this operation.
9. the exchange method between spatial network according to claim 7 and ground network is characterized in that, also comprises between described step 305 and step 306:
Step C1, described communication protocol gateway judge whether to carry out operation of relays, if then next-hop network is a junction network, and execution in step C2, otherwise execution in step 306;
Step C2, described communication protocol gateway determine the address of the communication protocol gateway of junction network correspondence according to the next-hop network address, so that fill in and be encapsulated into network transmission package, then execution in step 306 as treating relay address.
10. a communication protocol gateway is characterized in that, comprise main channel, vacant lot subchannel, empty subchannel, ground subchannel and absolutely empty subchannel, wherein
Described main channel comprises:
The monitoring reception module is used for monitoring and receive network transmission package based on the internet;
Transmission network classification identification module is used to discern the transmission network classification of described network transmission package;
Distribution module, be used for according to the transmission network classification that recognizes with network transmission package be sent to described vacant lot subchannel, empty subchannel, absolutely empty subchannel or ground, ground subchannel,
The empty subchannel of described vacant lot subchannel and ground comprises respectively:
Decapsulation module is used for carrying out the decapsulation operation according to the source network agreement of described network transmission package, obtains transmission information;
Protocol conversion module is used for described network transmission package is carried out protocol conversion;
Package module is used for carrying out encapsulation operation according to the next-hop network agreement of described network transmission package, fills in the new network transmission package of encapsulation according to described transmission information and next-hop network address;
First sending module is used to send new network transmission package to corresponding network,
Described ground ground subchannel and absolutely empty subchannel comprise respectively:
Processing module is used for described network transmission package is handled;
Second sending module is used to send network transmission package after the processing to corresponding network.
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| CN103199915A (en) * | 2013-03-01 | 2013-07-10 | 上海交通大学 | Empty heaven and earth collaborative multimedia network system |
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| US10291431B2 (en) * | 2014-03-03 | 2019-05-14 | Pismo Labs Technology Limited | Methods and systems for transmitting and receiving data through tunnel groups |
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| CN107395264A (en) * | 2017-07-19 | 2017-11-24 | 上海航天测控通信研究所 | A kind of communicator and method based on IP+over+CCSDS+AOS standards |
| CN113708824B (en) * | 2021-08-13 | 2022-10-14 | 核工业航测遥感中心 | Air-ground real-time transmission system and method for aerial geophysical prospecting data |
| CN115396261A (en) * | 2022-07-18 | 2022-11-25 | 北京空间飞行器总体设计部 | World protocol conversion gateway supporting instant use |
| CN116248172B (en) * | 2023-05-08 | 2023-07-07 | 银河航天(北京)网络技术有限公司 | Data transmission method, device and storage medium based on TCP/IP protocol and CCSDS protocol |
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