CN106788685A - Satellite network is based on the distributed location management synchronisation control means of earth station - Google Patents
Satellite network is based on the distributed location management synchronisation control means of earth station Download PDFInfo
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- CN106788685A CN106788685A CN201710036928.9A CN201710036928A CN106788685A CN 106788685 A CN106788685 A CN 106788685A CN 201710036928 A CN201710036928 A CN 201710036928A CN 106788685 A CN106788685 A CN 106788685A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
- H04B7/18545—Arrangements for managing station mobility, i.e. for station registration or localisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/06—Registration at serving network Location Register, VLR or user mobility server
- H04W8/065—Registration at serving network Location Register, VLR or user mobility server involving selection of the user mobility server
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
- H04W8/08—Mobility data transfer
Abstract
A kind of satellite network is based on the distributed location management synchronisation control means of earth station, and its step is：(1) satellite network is divided into some regions in ground mulching scope so that Dou Youyige earth stations realize location management in each region.(2) when there is new terminal to access satellite network, position information registration is carried out by earth station of the access satellite in belonging positions directorial area, log-on message includes the accessing terminal to network position and terminal unique identification information.(3) terminal access information is carried out location information synchronizing by the earth station by being registered in other earth stations.Be grouped for earth station first by the synchronization policy, and to the earth station in its affiliated group, synchronized update precise position information accesses satellite position and terminal unique mark；To earth station's synchronization attaching information, i.e. endpoint registration earth station location and terminal unique mark outside its affiliated group.Earth station's grouping algorithm is based on Greedy strategy, candidate terrestrial station is iterated, in each iteration, the size that the physical distance sum of Zu Nei earth stations is reached according to candidate terrestrial station is compared, choose the earth station with ultimate range to be added in group, until being finally fully completed packet.The method, it is poor to strengthen network scalability, reduces excessive overhead caused by hypo-optimal route, while avoiding the problem of single point failure, additionally can flexibly and effectively be provided with the mobility support of differentiation, has good novelty and uses meaning.
Description
Technical field
The invention belongs to satellite network communications field, and in particular in satellite network mobile management, satellite network is based on
The distributed location management synchronisation control means of earth station.
Background technology
Satellite is around earth high-speed motion so that the relative tool of access terminal in satellite network has mobility high very much, and then
The position in satellite network of terminal is caused to continue, quickly change.Existing satellite network location management control technology, main ginseng
According to the mobile management technology of ground network, such as MIP, MIPv6 etc., these technologies are all based on the location management framework concentrated,
Will terminal positional information storage in fixed charge method earth station.With being continuously increased for network size and number of users, Network
Diversification etc., this centralized location management exposes many problems in existing ground network, such as has poor expansion
Malleability；Suboptimum route problem causes luxus consumption core net bandwidth；The location management of centralization brings the performance bottleneck of centralization,
The problems such as also there is single point failure simultaneously；Additionally, the location management of centralization cannot also provide many grades, have the Position Pipe of differentiation
Reason service, for part is not required to the business of mobile management eager to excel in whatever one does and terminal, can not provide and distinguish mobility well
Support.
The content of the invention
The present invention is all based on the position management method of centralization according to above-mentioned satellite network location management, there is many lacking
Fall into, to solve the above problems, the present invention proposes a kind of distributed location management synchronisation control means based on earth station, its step
It is as follows：
The location management Division of A, satellite network coverage：First by satellite network ground wireless coverage model
Enclose, be divided into some regions so that Dou Youyige earth stations in each region, the access end in the region is responsible for by the earth station
End position information management, i.e., according to the unique constant mark of terminal (such as constant mark of own physical interface IP address or distribution),
The specific on-position of network (for effective routing address in satellite network) that terminal is currently located can be provided.Each ground
The location management area stood is independently fixed, when there is terminal to access satellite network in the region, can be completed by auxiliary equipments such as GPS
Positioning, determines its belonging positions directorial area.
B, access satellite carry out position information registration：When there is terminal to access satellite network, the end is generated by access satellite
Mapping content between the unique constant mark of the precise position information at end, i.e. terminal and access point network position.Then, according to terminal
Affiliated location management area, position information registration is carried out in corresponding earth station, and the log-on message is to include unique mark of terminal
Know and its access the network site of satellite；When access satellite of the terminal in satellite network changes, cut from a satellite
When changing to another inserting of satellite, then new positional information is generated by the new satellite that accesses, and in moment belonging positions management
Position information registration is carried out in the earth station in area.When terminal movement causes position directorial area to change, by accessing
The earth station that satellite is registered can also produce change.
Location information synchronizing between C, earth station：The step is mainly registration earth station by terminal positional information in satellite network
Synchronized at other earth stations in network.Be grouped for earth station first by the synchronization policy, pair with belonging to it in same group
Earth station, synchronous precise position information, i.e. terminal unique mark and its access satellite network site；To the ground outside affiliated group
The network site of face station, synchronous attaching information, i.e. terminal unique mark and registration earth station.In control renewal is synchronized,
When terminal because mobile handoff accesses new satellite, and when same earth station carries out position information registration, earth station's product is registered
Raw attaching information, i.e. terminal unique mark and the network site of registration earth station, are not changed in, therefore need not be to affiliated group
Outer earth station carries out attaching information synchronization.In the method being grouped, the invention devises a kind of packet based on greed
Algorithm is used to obtain approximate optimal solution.The algorithm carries out iteration one by one, each iteration to not being grouped earth station, i.e. candidate terrestrial station
In, the size that the physical distance sum of Zu Nei earth stations is reached according to candidate terrestrial station is compared, and choosing has ultimate range
Earth station be added to group in, until being finally completed whole packets, process is as follows：
A) face station number N to each group is determinedG；
B) it is directed to i-th group of earth station GiGeneration in：
If i. current group is sky, chooses any candidate terrestrial station and add Gi；
If ii. current group is not sky, from the set of candidate terrestrial station, earth station GW is chosen successivelyi, calculate it and arrive and work as
Previous existence interior all earth stations in groups physical distance sum Di；
Iii. choose to the candidate terrestrial station for being currently generated all earth station's physical distance sums maximums in group to be added to and work as
Previous existence is interior in groups；
Iv. i-iii steps are repeated, until current group GiInterior earth station's number reaches NG；
C) b step is repeated, until candidate terrestrial station collection is combined into sky, whole candidate terrestrial stations complete packet.
When earth station is grouped, when face station quantity is 1 to each group, now only belonged between all earth stations
Synchronizing information, i.e. terminal unique mark and registration earth station network site renewal, now effect be equal to earth station not
Packet；When all earth stations are divided into 1 group, real-time precise position information synchronization is only carried out between all earth stations, i.e., eventually
The synchronization of the network site of end unique mark and its access satellite.Above-mentioned terminal is mobile terminal.
Compared with prior art, the advantage of the invention is that：
1st, the method has preferable scalability.Managed using the distributed location based on earth station, can be effectively
Performance bottleneck is avoided, treatment load is distributed at multiple earth stations, while having accomplished location management thought nearby.
2nd, the method has the routed path for more optimizing.Using distributed location management so that location management anchor point away from
From terminal closer to and then causing that there is more optimal transmission path in the overall situation during data message forwarding, it is to avoid excessive
Take satellite network bandwidth.
3rd, the method has more preferable robustness.Due to location management is distributed into multiple earth stations, it is to avoid centralization
The problem of single point failure in management, realizes the flexible division of location management.
4th, the mobile support of differentiation can be flexibly provided with.For different terminal and application demand, distributed location pipe
Reason can provide different degrees of mobile support, the granularity of location information synchronizing in being managed by adjustment position, and then realize not
Same travelling performance is supported.
Brief description of the drawings
Fig. 1 is satellite network location management system framework sketch；
Fig. 2 is satellite network access terminal register flow path figure；
Fig. 3 is that registration earth station realizes global position synchronizing information register flow path figure；
Fig. 4 is the position enquiring flow chart under the present invention；
Fig. 5 is grouping algorithm flow chart of the present invention.
Specific embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.
As shown in figure 1, being based on the distributed location management system sketch of earth station for satellite network.Terminal, passes through first
Satellite 1 accesses satellite network, and by access satellite according to terminal position directorial area, at corresponding earth station A, enters line position
Put information registering.After earth station A receives location updating message, the distributed location used using the present invention manages Synchronization Control skill
Art, by satellite network, with other earth stations B, C, D etc., carries out location information synchronizing.
Assume initially that the location management area of each earth station has divided to finish, and location management control message is all being defended in network
Complete independently in StarNet's network, without direct terrestrial links.As shown in Fig. 2 ICBM SHF satellite terminal initiates to access in certain satellite
Journey, by satellite according to terminal belonging positions directorial area, earth station carries out position information registration in area.Earth station receives the registration
After information, according to the terminal whether first log-on message in local management area, judge whether to initiate global renewal process：
1) if not registering first and not using packet positions management strategy, the i.e. only local accurate position of real-time servicing
(terminals physical mark+access network position) management is put, outside earth station only stores the attaching information of local terminal, then need not
Carry out global renewal.
2) if terminal is not to register and employ packet positions management strategy first, precise position information is led in real time
Accuse with other earth stations in group.
3) if registering first, then it is communicated to the whole network earth station.For other earth stations outside group, then notice belongs to position
Confidence ceases, that is, register earth station location and terminals physical mark.
Fig. 3 is, using under grouping strategy, to initiate handling process during global renewal.Earth station receives new registration message
Afterwards, when renewal process is initiated, whether to be judged at same group according to purpose earth station, if at identical group, it is real
When send precise position information；Otherwise, homing position information is sent.
Fig. 4 is basic process during using position enquiring under the distributed location management strategy.Nonlocal terminal is being initiated
During with local terminal conversation procedure, position enquiring message can first pass around access satellite, be sent to nonlocal terminal present position pipe
Manage at the earth station in area, judged by earth station, if purpose terminal exact position is locally stored, direct home position is looked into
Ask response.Otherwise, earth station's storage is purpose terminal attaching positional information, then query message is redirected into storage purpose end
Hold the place of earth station of exact position, earth station here can be the earth station of directorial area where purpose terminal, or together
Purpose endpoint registration earth station belongs to an earth station for group.When redirecting position enquiring message, standard is made with time delay, chosen
Nearest earth station redirects.
Need exist for emphasizing in the location management based on IPv6, there is no location query function, data message exists
End is directly transmitted without location resolution, should under the conditions of, access satellite in not storage purpose terminal location routing iinformation,
First by data redirection to local ground station, if during the storage precise position information of local ground station, directly entered to message
Row address is replaced and is sent to purpose terminal, otherwise by message redirecting to the nearest earth station for storing exact position, and then
Re-send to purpose terminal.
Grouping algorithm when Fig. 5 is using grouping strategy.The algorithm is based on greedy thought, and all earth stations are changed
In generation, earth station is chosen from the set of candidate terrestrial station successively, after traveling through each time, choose an earth station and be added to new packet
Interior, until candidate terrestrial station, collection is combined into sky, and its process is as follows：
1) earth station GW is choseni, calculate its physical distance sum D for arriving all earth stations in current groupi。
If 2) DiMore than current candidate earth station GWcurReach current all earth station's physical distance sum Dcur, or
DcurNo initializtion, then by GWiAs new candidate terrestrial station.
3) 1,2 steps are repeated, until all earth stations are by iteration, by final GWcurIt is added to Current terrestrial station point
In group.
If 4) current group earth station quantity reaches the upper limit, new iteration is carried out, repeat 1-3 steps.
5) 1-4 steps are repeated, until whole earth stations all complete packet.
Claims (4)
1. a kind of satellite network is based on the distributed location management synchronisation control means of earth station, it is characterised in that comprising following step
Suddenly：
A, location management Division：By satellite network in the coverage on ground, some location management areas are divided into so that each
Dou Youyige earth stations in region, the access terminal location information management in the region is responsible for by the earth station；
B, terminal carry out position information registration by satellite：When there is terminal to access satellite network, the end is generated by access satellite
Mapping between the positional information at end, i.e. terminal iidentification and access point network position, the ground in the location management area belonging to terminal
Face station carries out position information registration, and the positional information includes the unique mark of terminal and its network site for accessing satellite；When
Access satellite of the terminal in satellite network changes, when being switched to another inserting of satellite from a satellite, yet by
The new new positional information of satellite generation that accesses carries out position information registration in the earth station of belonging positions directorial area；
Location information synchronizing between C, earth station：Other earth stations of registration earth station by terminal positional information in satellite network
Place synchronizes；Be grouped for earth station first by synchronization policy, pair with the earth station belonging to it in same group, synchronous accurate position
Confidence ceases, i.e. the network site of terminal unique mark and its access satellite；To the earth station outside affiliated group, synchronous attaching information,
I.e. terminal unique mark and registration earth station network site.
2. a kind of satellite network according to claim 1 is based on the distributed location management synchronisation control means of earth station,
It is characterized in that：Satellite carries out position information registration according to terminal present position directorial area, the earth station in respective area；
When terminal movement causes position directorial area to change, the earth station registered by accessing satellite can also produce change
Change.
3. a kind of satellite network according to claim 1 is based on the distributed location management synchronisation control means of earth station,
It is characterized in that：Be grouped for earth station by the synchronization policy；Grouping algorithm is based on greedy thought, successively to not being grouped candidate ground
Face station is iterated, in each iteration, according to candidate terrestrial station to the physical distance sum for being currently generated all earth stations in group
Size be compared, choose with ultimate range earth station be added to be currently generated group in, until be finally completed all point
Group, grouping algorithm detailed process is as follows：
A) face station number N to each group is determinedG；
B) it is directed to i-th group of earth station GiGeneration：
If i. current group is sky, chooses any candidate terrestrial station and add Gi；
If ii. current group is not sky, from the set of candidate terrestrial station, earth station GW is chosen successivelyi, calculate it and arrive and work as previous existence
The physical distance sum D of interior all earth stations in groupsi；
Iii. choose to the candidate terrestrial station for being currently generated all earth station's physical distance sums maximums in group to be added to and work as previous existence
It is interior in groups；
Iv. i-iii steps are repeated, until current group GiInterior earth station's number reaches NG；
C) b step is repeated, until candidate terrestrial station collection is combined into sky, whole candidate terrestrial stations complete packet.
4. a kind of satellite network according to claim 1 is based on the distributed location management synchronisation control means of earth station,
It is characterized in that：When earth station is grouped, when face station quantity is 1 to each group, now only carried out between all earth stations
The renewal of the network site of attaching information synchronization, i.e. terminal unique mark and registration earth station, is now equal to earth station not
Packet；When all earth stations are divided into 1 group, real-time precise position information synchronization is only carried out between all earth stations, i.e., eventually
The synchronization of the network site of end unique mark and its access satellite.
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|---|---|---|---|---|
| CN108199763A (en) * | 2017-12-29 | 2018-06-22 | 清华大学 | Repeater satellite method for scheduling task and system |
| CN109379126A (en) * | 2018-10-09 | 2019-02-22 | 中国人民解放军国防科技大学 | Indirect measurement and control method suitable for cluster spacecraft |
| CN110798803A (en) * | 2019-11-12 | 2020-02-14 | 深圳星联天通科技有限公司 | Ship, shipborne satellite communication terminal and network switching control method thereof |
| CN111356185A (en) * | 2018-12-21 | 2020-06-30 | 电信科学技术研究院有限公司 | Switching control method and equipment |
| CN111510203A (en) * | 2020-07-02 | 2020-08-07 | 南京凯瑞得信息科技有限公司 | Satellite-ground cooperative paging method and device for satellite communication system |
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| CN112566035A (en) * | 2020-11-16 | 2021-03-26 | 天地信息网络研究院(安徽)有限公司 | Terminal position management method for satellite communication network |
| CN114095068A (en) * | 2021-08-30 | 2022-02-25 | 西安空间无线电技术研究所 | Distributed position management method for low-earth-orbit satellite communication system |
| CN114095068B (en) * | 2021-08-30 | 2024-02-09 | 西安空间无线电技术研究所 | Distributed position management method for low-orbit satellite communication system |
| CN113824639A (en) * | 2021-09-06 | 2021-12-21 | 天地信息网络研究院(安徽)有限公司 | Satellite network label switching method of complexity at terminal |
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