CN102271328A - An information transmission method for aerospace information network - Google Patents
An information transmission method for aerospace information network Download PDFInfo
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- CN102271328A CN102271328A CN2011102118860A CN201110211886A CN102271328A CN 102271328 A CN102271328 A CN 102271328A CN 2011102118860 A CN2011102118860 A CN 2011102118860A CN 201110211886 A CN201110211886 A CN 201110211886A CN 102271328 A CN102271328 A CN 102271328A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04B7/18502—Airborne stations
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Abstract
The invention relates to an air-space information network information transmission method, comprising the following steps: addressing a network, searching users, forwarding data and maintaining a route. The scheme can adapt to the dynamic environment that a network user moves at high speed and is frequently switched. The air-space information network information transmission method has the characteristics of high reliability, small time delay, small route cost and the like and provides a feasible solution for forwarding data of the air-space information network. The network addressing method disclosed by the technical scheme is convenient for a relay node to identify users and backbone nodes on a data source end and a target end, reduces routing list storage space and reduces network expenditure because the backbone node frequently carries out user address distribution and recovery. The user looking-up method reduces the expenditure for building the route for a high-speed mobile user, and time delay in the route building process for fixed or low-speed mobile users can be avoided. According to the route maintaining method, data transmission continuity in the route rebuilding process when a user is switched is guaranteed, and data transmission can quickly restore to the optimal path.
Description
Technical field
The present invention relates to a kind of information transferring method, relate in particular to a kind of information transferring method of empty day information network.
Background technology
An empty day information network is a kind of integrated network that has comprised variety classeses such as various satellites, high altitude communication platform, various aircraft, aircraft and ground communication station, different qualities communication system.Can be used as the emergency communication system under disaster, the war environment, also can be used as the expansion of conventional communication networks,, have broad application prospects for the fusion of heterogeneous network provides support.In empty day information network, all kinds of satellites and high altitude communication platform coverage are big, position stability (high altitude communication platform) or have regularity (satellite), and their constitute the backbone node of network, are responsible for Network Management and message transmission.Various aircrafts, aircraft and ground fixed station or personnel, vehicle as the user node of network, carry out each other transfer of data by backbone node.
In the backbone node of network, the satellite communication system coverage is big, and suitable broadcast communication, and the major function in the therefore empty day information network is monitoring, collection network state information, realizes whole Network Management.When link damaged between link damage or user and the high altitude communication platform between the high altitude communication platform, satellite system provided relay services for the communication between the node.
High altitude communication platform (dirigible, balloon) position relative fixed, a plurality of high altitude communication platforms are formed the metastable network of topological structure, are responsible in certain overlay area relaying from satellite and user's information.Can direct communication between the high altitude communication platform or communicate by the multi-hop mode.Because the height very high (for example the satellite height is 35786 kms) of satellite, the information relay that directly carries out via satellite between the terrestrial user needs bigger power, and time-delay also bigger (round trip delay time is 250-280ms).And the height of high altitude communication platform is generally the 20-50 km, well below the height of satellite, can receive satellite monitor less than low-power signal, and the path loss on high altitude communication platform and ground is less, lacks dB more than 70 than satellite.Therefore the communication between terrestrial user and the aircraft utilizes the high altitude communication platform to carry out relaying as far as possible, is convenient to the real-time Transmission of user data and the miniaturization of terminal antenna.
Research at empty day information network route technology at present is in the starting stage, and existing achievement in research is less.Close with it route technology comprises wireless self-networking route technology, satellite network route technology.Because the difference of network configuration characteristics, these route technologies are difficult to well be used in empty day information network.
Wireless self-networking route technology: mainly be divided into table and drive Routing Protocol and on-demand routing protocol.Table drives in the Routing Protocol, and each node self is saved in the routing table of every other node, by information exchange regular between the node, upgrades routing table information, when data will send, directly transmits according to routing table.In the on-demand routing protocol, node found the route of destination node earlier, then according to these routing forwarding data by the exchange of control information before sending data.
Satellite network route technology: mainly be the regularity of utilizing satellite motion, the period of motion of satellite is divided into a plurality of time slots, think that in each time slot the position of satellite remains unchanged, form a series of static route, when carrying out transfer of data, according to residing time slot, transmit according to corresponding static route.
An empty day information network has following characteristics:
1, the backbone node topology has regularity, but certain customers' position high speed dynamic change is unpredictable.2, adopt the multi-hop mode to transmit data by backbone node between the user.
3, euclidean distance between node pair is far away, and the data dissemination time-delay be can not ignore.
Therefore existing wireless self-networking route technology and satellite network route technology are used in empty day information network and following problem can be occurred:
Routing cost is big: if adopt the table in the wireless self-networking to drive route, network node need regularly carry out information exchange, more new routing information.Because node movement velocitys such as satellite in the empty day information network and aircraft are fast, change in location is quite frequent.For guaranteeing the correct of routing iinformation, network node need carry out information exchange continually and obtain up-to-date routing iinformation.Cause a large amount of routing costs, wasted limited Internet resources.
The data time-delay is big: if the on-demand routing protocol in the employing wireless self-networking, network node only just carries out searching of route when having data to transmit, reduced routing cost, but because distance between the network node, the propagation delay of data be can not ignore, therefore the route querying process will increase time delay of data transmission, reduce efficiency of transmission.
Poor reliability: because the user that empty day information network served not only comprises traditional terrestrial user, also comprise the users such as aircraft, aircraft of high-speed motion, topology of networks has characteristics such as randomness, dynamic.The simple method for routing that relies on the satellite motion rule to divide a series of static topologys is difficult to correctly reflect the topology situation of whole network, and reliable routing iinformation is provided.
Summary of the invention
The technical problem that the present invention solves is: a kind of empty day information network information transferring method is provided, overcomes the application in empty day information network of existing wireless self-networking route technology and satellite network route technology and can occur that routing cost is big, the data time-delay is big, the technical problem of poor reliability.
Technical scheme of the present invention is: a kind of empty day information network information transferring method is provided, and a described empty day information network comprises backbone node, user node, comprises the steps:
Network addressing: the address structure that makes up empty day information network, the address structure in described network layer packet header comprises the backbone node address, source of the source user node address that sends data, the purpose user node address that receives data, source user access and the purpose backbone node address that the purpose user inserts, backbone node address, described source and purpose backbone node address are distributed when making up empty day information network, and described source user node address, purpose user node address are distributed when the user adds empty day information network;
Reception information: receive data waiting for transmission;
The user searches: the backbone node of empty day information network constitutes a subnet in its coverage, backbone node makes up its known backbone node and user's corresponding relation, when data will send to the user, the backbone node that sends data was searched the subnet at data purpose user place;
Information sends: the route of the backbone node of the subnet calculating transmission data at the purpose user place that the backbone node basis of transmission data finds and purpose user's backbone node, and purpose backbone node address write network layer packet header of data, send data according to route then.
Further technical scheme of the present invention is: in the network addressing step, backbone node address, described source and purpose backbone node address adopt 10 to address respectively.
Further technical scheme of the present invention is: in the network addressing step, the address structure of described empty day information network also comprises source user type and purpose user type.
Further technical scheme of the present invention is: in user's finding step, the subnet that the source backbone node of transmission data is searched data purpose user place comprises the steps:
Send Query Information: the source backbone node that sends data sends the subnet Query Information;
Receive Query Information: the backbone node of receiving the subnet Query Information judges whether to receive this Query Information by source user node address and purpose user node address and sequence number, do not process if receive then, otherwise judge that the purpose user is whether in the subnet of self, if purpose user then transmits this Query Information not in the subnet of oneself; Find the purpose user within the subnet of oneself if receive the backbone node of Query Information, to the source backbone node answer subnet response message that begins most to send the subnet Query Information.
Further technical scheme of the present invention is: in user's finding step, source backbone node that the backbone node of subnet Query Information and subnet response message process in transmission course will be wherein and source user node and purpose backbone node and purpose user node information are recorded among the user and backbone node relation table who self preserves.
Further technical scheme of the present invention is: in user's finding step, for fixed-line subscriber or low speed mobile subscriber, when the user was registered to certain backbone node subnet, this backbone node sent the subnet updating message, notifies all backbone nodes with this information.
Further technical scheme of the present invention is: in user's finding step, for the high-speed mobile user, start user's search procedure when having data to send.
Further technical scheme of the present invention is: the backbone node that participates in data forwarding is according to backbone node address, source in the network layer packet header and purpose backbone node address computation route, and data are transmitted in continuation.
Further technical scheme of the present invention is: comprise also in the information network information transferring method that at empty day carrying out route when the user is switched between different sub-network rebuilds, described route is rebuild and is comprised the steps:
Register at new backbone node: when the user is switched between different sub-network, promptly switch to new backbone node subnet from old backbone node subnet, the user registers at new backbone node;
Cancel register: new backbone node sends cancel register information, notifies old backbone node deletion user's log-on message;
Route is rebuild: old backbone node is issued the source backbone node with the cancel register information of receiving, the notification source backbone node carries out route to be rebuild, and carries out route by the source backbone node and rebuilds;
Further technical scheme of the present invention is: in the route reconstruction procedures, if source backbone node and purpose user's new route is not also set up, the source backbone node can continue to send the data to old backbone node, give new backbone node by old backbone node with this data forwarding, be transmitted to the user by new backbone node again.
Technique effect of the present invention is: a kind of empty day information network information transferring method of the present invention, designed a kind of feasible routing solution at empty day information network characteristics, and comprise that network addressing, user search, data forwarding and route maintenance procedure.This scheme can adapt to network user's high-speed mobile and the frequent dynamic environment of switching, and has characteristics such as reliability height, time-delay is little, routing cost is little, for the data forwarding of empty sky information network provides a kind of feasible solution.Network addressing method in this invention technical scheme can make things convenient for the user and the backbone node of via node identification data source end and destination, reduce the routing table memory space, and reduce by backbone node and carry out the network overhead that frequent station address distributes and recovery causes.At user's different mobility, adopt respectively and search the subnet of determining the user place with the method for real-time update as required in user's lookup method.Reduce high-speed mobile user's routing cost, avoided fixing or low speed mobile subscriber route to set up time-delay in the process.Guarantee that by the mode that the part route is rebuild and system-wide is combined by reconstruction user's switching between subnet improves the reliability of route, and makes transfer of data quickly recover to optimal path according to transmission continuity in the technical solution of the present invention.
Description of drawings
Fig. 1 is a flow chart of the present invention.
Fig. 2 is the object of the invention user search procedure schematic diagram.
Fig. 3 is a preferred embodiment for the present invention flow chart.
Fig. 4 rebuilds flow chart for route of the present invention.
Route maintenance schematic diagram when Fig. 5 switches for the present invention.
Embodiment
Below in conjunction with specific embodiment, technical solution of the present invention is further specified.
As shown in Figure 1, the specific embodiment of the present invention is: a kind of empty day information network information transferring method is provided, and a described empty day information network comprises backbone node, user node, comprises the steps:
Step 100: network addressing, that is: make up the address structure of empty day information network, the address structure in described network layer packet header comprises the backbone node address, source of the source user node address that sends data, the purpose user node address that receives data, source user access and the purpose backbone node address that the purpose user inserts, backbone node address, described source and purpose backbone node address are distributed when making up empty day information network, and described source user node address, purpose user node address are distributed when the user adds empty day information network.
Specific implementation process is as follows: network addressing of the present invention is revised the address structure in traditional network layer packet header, designed the address structure of empty day information network, source user, purpose user and source backbone node and purpose backbone node information have been comprised, and node type information, as shown in table 1.Among the present invention, described source backbone node is for sending the backbone node that source user inserted of data, and the purpose backbone node is the backbone node that purpose user inserted of data.
Table 1 network layer packet leading address structural design
The station address of legacy network is distributed by the gateway of user place subnet or router, determines the subnet at user place in order to represent a large amount of main frames in the network, to adopt 32 address structure by subnet mask.This method of salary distribution is more suitable in fixed network, but in empty day information network of user's dynamic motion, when the user frequently between different sub-network when mobile, need be its distribution continually and reclaim the address, the expense of increase network.
Network addressing of the present invention is according to the structure and the characteristics of empty day information network, the backbone node of network and number of users are far smaller than the number of users of the Internet, can come with less relatively address space backbone node and user are identified respectively, the address information space of 32 of tradition is repartitioned, and the implication of the part of making an amendment is as follows:
The source user address---18, expression sends the source node of data, is the user node of empty day service of information network.
Key address, source---10, the network backbone node that the expression source user inserts.
The source user type---4, be used for source user is distinguished in the identity and the function of network or task.
The purpose station address---18, expression receives the destination node of data, is the user node of empty day service of information network.
The key address of purpose---10, the network backbone node that expression purpose user inserts.
The purpose user type---4, be used for the purpose user is distinguished in the identity and the function of network or task.
Wherein the address of backbone node is distributed in the initialization procedure of building network, adds fashionablely as new backbone node, be that it distributes the backbone node address, and all backbone nodes in the network carries out the renewal of relevant information.For network user's node, when it added network, network was its distributing user address, and with other nodes in this user's the address information informing network.When node exits network, regain this address of node, and with other nodes in this information informing network.
By redesign to network layer packet header, backbone node in the network is when carrying out data forwarding, can clearly grasp source node and destination node information, can discern the user identity of the transmission and the reception of this information easily, and by key address, source and the key address entries of purpose, can search route rapidly and accurately, transmit data.Simultaneously, owing to all use 10 backbone node address to identify in routing table of preserving in the network backbone node and the network state information table, with respect to 32 IP addresses in the traditional Internet, the shared memory space of routing table also significantly reduces.
Step 200: reception information that is: receives data waiting for transmission.
Step 300: the user searches, that is: the backbone node of empty day information network constitutes a subnet in its coverage, backbone node makes up its known backbone node and user's corresponding relation, when data will send to the user, the backbone node that sends data was searched the subnet at data purpose user place.
Specific implementation process is as follows: among the present invention, each backbone node constitutes a subnet in the empty day information network in its coverage, and this backbone node is responsible for the message transmission of user in the subnet.Preserve self known backbone node and user's mapping table in each backbone node, and upgrade according to the subnet updating message that receives.By way of example, this list structure is as shown in table 2.
Table 2 backbone node and user's corresponding relation
| Station address | Key address | Effective time |
| Aircraft 01 | High altitude communication platform 01 | T1=1 minute |
| Ground station 01 | LEO 11 | T2=6 minute |
| Automobile 02 | High altitude communication platform 02 | T3=6 hour |
| …… | …… | …… |
When data will send to the user, the source backbone searched self backbone node and user's mapping table, if wherein comprise effective corresponding relation, the source backbone finds the purpose backbone to carry out searching or calculating of route from table.If there is not effective corresponding relation in this table, the key subnet query script that starts the purpose user in source.Wherein decide node type difference, user's subnet in also different, difference effective time of corresponding subnet information effective time in the net time by the type of user node and backbone node.For example go up in the table, be 1 minute the effective time of the position of aircraft and high altitude communication platform relation, and ground station is 6 minutes the effective time corresponding with low orbit satellite, and automobile is 6 hours with the corresponding effective time of high altitude communication platform.
Backbone node upgrade backbone node and user's mapping table and search the purpose user procedures as follows:
One, for fixed-line subscriber or the relatively lower user of translational speed, when the user was registered to certain backbone node subnet, this backbone node sent the subnet updating message, notifies all backbone nodes with this information.Because the renewal frequency of this type of information is very low, can not increase the burden of network, and can in time understand the position at user place.The form of subnet updating message is as shown in table 3.
Table 3 subnet updating message form
| 2 bytes | 18bit | 10bit | 2 bytes |
| Type of message | Station address | Key address | Effective time |
When data will send to fixed-line subscriber or low speed user, the source backbone searched backbone node and user's mapping table, found the pairing purpose backbone of purpose user.
Two, for user's (as aircraft, aircraft etc.) of high-speed mobile, because its motion does not have rule, and the switching between subnet is more frequent, if the subnet information to all user places carries out real-time update, a large amount of communication overheads will be produced, when especially the number of users that moves when the network high speed is many, this expense will take a large amount of Internet resources.Therefore adopt as required mode to carry out the user and search, only when having data to send, start user's search procedure.
Purpose user subnet query script as shown in Figure 2.When source user M will be when purpose user N sends data, M at first sends the data to the source backbone node A at M place, and A searches the subnet at purpose user N place.A at first sends subnet Query Information (REQ:request), each receives that the backbone node of REQ judges whether to receive this REQ by checking wherein source and destination information and sequence number, if received then do not process, otherwise judge the purpose user whether in the subnet of self, if not continue broadcasting REQ.When backbone node B receives REQ, find the purpose user within the subnet of oneself, so reply response message (REP:reply) to the key A in source.After A received REP, understanding the purpose backbone was B, calculated the route of A to B, sent data message.
REQ and REP transmission the backbone node of process, key and the source user in source that can will be wherein and purpose is key and purpose user profile is recorded among the user and key relation table of self preservation, when the node that continues so in these has data will send to source user or purpose user, can directly send, reduce the time of inquiry, made things convenient for transfer of data.
(REQ, request) (REP, reply), the structure of message is shown in table 4,5 with the subnet response message adopting mode as required to seek to need in the subnet process of purpose user place the control information that exchanges to comprise the subnet query messages.
Table 4 subnet query messages form
| 2 bytes | 18bit | 10bit | 18bit | 2 bytes | 2 bytes |
| Type | Purpose user | Key address, source | The source user address | Sequence number | Effective time |
Table 5 subnet response message form
| 2 bytes | 18bit | 10bit | 18bit | 10bit | 2 bytes | 2 bytes |
| Type | Purpose user | Key address, source | The source user address | The key address of purpose | Sequence number | Effective time |
Step 400: information sends: the route of the backbone node of the subnet calculating transmission data at the purpose user place that the backbone node basis of transmission data finds and purpose user's backbone node, and purpose backbone node address write network layer packet header of data, send data according to route then.
Specific implementation process is as follows:
Behind the purpose backbone under the source backbone node finds the purpose user, calculating source backbone arrives purpose backbone's route, and carries out forwarding of data by this route.
Because distance between the backbone node, propagation delay can not be ignored, and therefore will delay time and calculate route between the backbone node as main cost, selects the path of time-delay minimum.
The characteristics of motion of in store whole all backbone nodes of network in the backbone node can calculate the position and the distance of all backbone nodes at this moment according to the characteristics of motion.
If s is a source node, t is a destination node,
Be the paths from the source node to the destination node,
The time-delay cost of the link that constitutes by node i and node j on the expression transmission path.Then adopt the path
Carry out the time delay of data transmission cost
Be the time-delay cost sum of each bar link on the path, as shown in Equation (1).
Utilizing the Dijkstra shortest path first, is target to minimize the time-delay cost, calculates the route between the backbone node, and according to these routing forwarding data.
As shown in Figure 3, preferred implementation of the present invention is: comprise also in the information network information transferring method that at empty day carrying out route when the user is switched between different sub-network rebuilds, because user's high-speed motion, in data transmission procedure, the user may move to another subnet from the subnet of a backbone node, cause original route to lose efficacy, cause transmission to be interrupted.Designed the route maintenance strategy at this problem, when the user is switched, carried out route and rebuild between different sub-network.The route reconstruction mode that adopts is that the part reconstruction is combined by reconstruction with system-wide, in handoff procedure, adopt the part route to rebuild, the notification source node carries out system-wide by reconstruction simultaneously, the route transmission data of before system-wide is finished by reconstruction, always using part to rebuild, both ensured communication continuity, and made transfer of data quickly recover to optimal path again.
As shown in Figure 4, described route is rebuild and is comprised the steps:
Step 501: in new backbone node registration, that is: when the user was switched between different sub-network, the user registered at new backbone node.
Step 502: cancel register, that is: new backbone node deletion user in old backbone node information and notify old key joint;
Step 503: route is rebuild, that is: old backbone node is issued the source backbone node with the cancel register information of receiving, the notification source backbone node carries out route to be rebuild, and carries out route by the source backbone node and rebuilds.
Specific implementation process such as Fig. 5, illustrate as follows: suppose that mobile node M such as aircraft move in the subnet of backbone node A, when M moves to the overlapping region of A and B coverage, select new backbone node B to insert according to the pilot signal strength that receives, this moment, M sent REG to B, B replys ACK M is joined in the B subnet, and be transmitted to A cancel register information (DREG:delete registration information) by B, the information of deletion M in the A subnet, and notice A node: the M node has joined in the B subnet, after A receives DREG, DREG information is sent to the source backbone, notification source backbone carries out route and rebuilds.If also be not activated source node and set up process to the new route of M node this moment, source node can continue to send the data to A, then A gives B with this data forwarding, be transmitted to M by B again, this strategy has guaranteed to carry out the subnet switching according to transmission continuity at mobile node, has avoided because re-transmission and the network delay that the transmission interruption causes.
Wherein the information format of REG, DREG is shown in table 6, table 7.
Table 6 REG message format
| 2 bytes | 18bit | 10bit | 10bit |
| Type of message | Station address | The new key address of registering | Old key address |
Table 7 DREG message format
| 2 bytes | 18bit | 10bit | 10bit |
| Type of message | The station address of cancel register | New key address | Old key address |
In effective time, the user might move to outside the subnet of backbone node, and the switchover policy of technical solution of the present invention design can be avoided owing to switch the transmission interruption that causes.
Technique effect of the present invention is: a kind of empty day information network information transferring method of the present invention, designed a kind of feasible routing solution at empty day information network characteristics, and comprise that network addressing, user search, data forwarding and route maintenance procedure.This scheme can adapt to network user's high-speed mobile and the frequent dynamic environment of switching, and has characteristics such as reliability height, time-delay is little, routing cost is little, for the data forwarding of empty sky information network provides a kind of feasible solution.Network addressing method in this invention technical scheme can make things convenient for the user and the backbone node of via node identification data source end and destination, reduce the routing table memory space, and reduce by backbone node and carry out the network overhead that frequent station address distributes and recovery causes.At user's different mobility, adopt respectively and search the subnet of determining the user place with the method for real-time update as required in user's lookup method.Reduce high-speed mobile user's routing cost, avoided fixing or low speed mobile subscriber route to set up time-delay in the process.Guarantee that by the mode that the part route is rebuild and system-wide is combined by reconstruction user's switching between subnet improves the reliability of route according to transmission continuity in this scheme.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. empty day information network information transferring method, a described empty day information network comprises backbone node, user node, comprises the steps:
Network addressing: the address structure that makes up empty day information network, the address structure in described network layer packet header comprises the backbone node address, source of the source user node address that sends data, the purpose user node address that receives data, source user access and the purpose backbone node address that the purpose user inserts, backbone node address, described source and purpose backbone node address are distributed when making up empty day information network, and described source user node address, purpose user node address are distributed when the user adds empty day information network;
Reception information: receive data waiting for transmission;
The user searches: the backbone node of empty day information network constitutes a subnet in its coverage, backbone node makes up its known backbone node and user's corresponding relation, when data will send to the user, the backbone node that sends data was searched the subnet at data purpose user place;
Information sends: the route of the backbone node of the subnet calculating transmission data at the purpose user place that the backbone node basis of transmission data finds and purpose user's backbone node, and purpose backbone node address write network layer packet header of data, send data according to route then.
2. empty day according to claim 1 information network information transferring method is characterized in that in the network addressing step, backbone node address, described source and purpose backbone node address adopt 10 to address respectively.
3. empty day according to claim 1 information network information transferring method is characterized in that in the network addressing step, the address structure of described empty day information network also comprises source user type and purpose user type.
4. empty day according to claim 1 information network information transferring method is characterized in that in user's finding step, the subnet that the source backbone node of transmission data is searched data purpose user place comprises the steps:
Send Query Information: the source backbone node that sends data sends the subnet Query Information;
Receive Query Information: the backbone node of receiving the subnet Query Information judges whether to receive this Query Information by source user node address and purpose user node address and sequence number, do not process if receive then, otherwise judge that the purpose user is whether in the subnet of self, if purpose user then transmits this Query Information not in the subnet of oneself; Find the purpose user within the subnet of oneself if receive the backbone node of Query Information, to the source backbone node answer subnet response message that begins most to send the subnet Query Information.
5. empty day according to claim 4 information network information transferring method, it is characterized in that, in user's finding step, source backbone node that the backbone node of subnet Query Information and subnet response message process in transmission course will be wherein and source user node and purpose backbone node and purpose user node information are recorded among the user and backbone node relation table who self preserves.
6. empty day according to claim 1 information network information transferring method, it is characterized in that, in user's finding step, for fixed-line subscriber or low speed mobile subscriber, when the user is registered to certain backbone node subnet, this backbone node sends the subnet updating message, notifies all backbone nodes with this information.
7. empty day according to claim 1 information network information transferring method is characterized in that, in user's finding step, for the high-speed mobile user, starts user's search procedure when having data to send.
8. empty day according to claim 1 information network information transferring method is characterized in that the backbone node that participates in data forwarding is according to backbone node address, source in the network layer packet header and purpose backbone node address computation route, and the forwarding data.
9. empty day according to claim 1 information network information transferring method, it is characterized in that, also comprise in the information network information transferring method that at empty day carrying out route when the user is switched between different sub-network rebuilds, described route is rebuild and is comprised the steps:
Register at new backbone node: when the user is switched between different sub-network, promptly switch to new backbone node subnet from old backbone node subnet, the user registers at new backbone node;
Cancel register: new backbone node sends cancel register information, notifies old backbone node deletion user's log-on message;
Route is rebuild: old backbone node is issued the source backbone node with the cancel register information of receiving, the notification source backbone node carries out route to be rebuild, and carries out route by the source backbone node and rebuilds.
10. empty day according to claim 9 information network information transferring method, it is characterized in that, in the route reconstruction procedures, if source backbone node and purpose user's new route is not also set up, the source backbone node can continue to send the data to old backbone node, give new backbone node by old backbone node with this data forwarding, be transmitted to the user by new backbone node again.
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| CN201110211886.0A CN102271328B (en) | 2011-07-27 | 2011-07-27 | Air-space information network information transmission method |
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| CN106603147A (en) * | 2017-01-18 | 2017-04-26 | 中国人民解放军国防科学技术大学 | Software defined networking-based air and space information network business forwarding method |
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