CN106788685B - Satellite network manages synchronisation control means based on the distributed location of earth station - Google Patents
Satellite network manages synchronisation control means based on the distributed location of earth station Download PDFInfo
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- CN106788685B CN106788685B CN201710036928.9A CN201710036928A CN106788685B CN 106788685 B CN106788685 B CN 106788685B CN 201710036928 A CN201710036928 A CN 201710036928A CN 106788685 B CN106788685 B CN 106788685B
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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
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- 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
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- 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
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- 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
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Abstract
A kind of distributed location management synchronisation control means of the satellite network based on earth station, the steps include: that satellite network is divided into several regions in ground mulching range by (1), so that Dou Youyige earth station realizes location management in each region.(2) when there is new terminal to access satellite network, by access satellite, the earth station in belonging positions directorial area carries out position information registration, and registration information includes the accessing terminal to network position and terminal unique identification information.(3) terminal access information is subjected to location information synchronizing in other earth stations by the earth station registered.Earth station is grouped by the synchronization policy first, to the earth station in its affiliated group, synchronized update precise position information, i.e. access satellite position and terminal unique identification；To the synchronous attaching information of earth station outside its affiliated group, i.e. endpoint to register earth station location and terminal unique identification.Earth station's grouping algorithm is based on Greedy strategy, candidate terrestrial station is iterated, in each iteration, the size for reaching the sum of physical distance of Zu Nei earth station according to candidate terrestrial station is compared, choosing, there is the earth station of maximum distance to be added in group, until being finally fully completed grouping.The problem of this method, it is poor to enhance network scalability, reduces excessive overhead caused by hypo-optimal route, while avoiding single point failure, additionally can flexibly and effectively be provided with the mobility support of differentiation, have well it is innovative with use meaning.
Description
Technical field
The invention belongs to satellite network communications fields, and in particular in satellite network mobile management, satellite network is based on
The distributed location of earth station manages synchronisation control means.
Background technique
Satellite is around earth high-speed motion, so that the opposite tool of access terminal in satellite network has high mobility very much, in turn
The position in satellite network of terminal is caused to continue, quickly variation.Existing satellite network location management control technology, it is main to join
According to the mobile management technology of ground network, such as MIP, MIPv6 etc., these technologies are all based on the location management framework of concentration,
Terminal positional information is stored in fixed charge method earth station.With being continuously increased for network size and number of users, network service
Diversification etc., this centralized location management exposes many problems in existing ground network, such as has poor expand
Malleability；Suboptimum route problem leads to excessive consumption core net bandwidth；The location management of centralization brings the performance bottleneck of centralization,
Also there is the problems such as single point failure simultaneously；In addition, the Position Pipe that the location management of centralization also can not provide multi-grade, have differentiation
Reason service can not provide for being partially not required to the business and terminal of mobile management eager to excel in whatever one does and distinguish mobility well
It supports.
Summary 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 lack
It falls into, to solve the above problems, the present invention proposes a kind of distributed location management synchronisation control means based on earth station, step
It is as follows:
A, the location management Division of satellite network coverage area: the wireless coverage model first by satellite network on ground
It encloses, is divided into several regions, so that Dou Youyige earth station in each region, is responsible for the end of the access in the region by the earth station
End position information management, i.e., according to the unique constant mark of terminal (such as own physical interface IP address or distribution constant mark),
It is capable of providing the specific on-position of network that terminal is currently located (for effective routing address in satellite network).Each ground
The location management area stood is independently fixed, when there is terminal to access satellite network in the area, can be completed by ancillary equipments such as GPS
Positioning, determines its belonging positions directorial area.
B, access satellite carries out position information registration: when there is terminal to access satellite network, generating the end 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 carries out position information registration in corresponding earth station, which is the unique mark for including 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 location information is generated by newly accessing satellite, and in the moment belonging positions management
Position information registration is carried out in the earth station in area.When terminal is mobile, and position directorial area is caused to change, pass through access
The earth station that satellite is registered can also generate variation.
C, the location information synchronizing between earth station: the step predominantly registers earth station for terminal positional information in satellite network
It is synchronized at other earth stations in network.Earth station is grouped by the synchronization policy first, to its belonging in same group
Earth station, synchronous precise position information terminal unique identification and its accesses the network site of satellite；To the ground outside affiliated group
Face station, synchronous attaching information, the i.e. network site of terminal unique identification and registration earth station.In synchronizing control update,
When terminal since mobile handoff accesses new satellite, and when same earth station carries out position information registration, it is registered earth station's production
Raw attaching information, the i.e. network site of terminal unique identification and registration earth station, do not change, therefore do not need to affiliated group
It is synchronous that outer earth station carries out attaching information.In the method being grouped, which devises a kind of grouping based on greed
Algorithm is to obtain approximate optimal solution.For the algorithm to earth station is not grouped, i.e. candidate terrestrial station carries out iteration one by one, each iteration
In, the size for reaching the sum of physical distance of Zu Nei earth station according to candidate terrestrial station is compared, and choosing has maximum distance
Earth station be added in group, until be finally completed whole groupings, 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:
I. it if current group is sky, chooses any candidate terrestrial station and G is addedi；
Ii. if current group is not sky, from the set of candidate terrestrial station, earth station GW is successively choseni, it is calculated to working as
Previous existence in groups in all earth stations the sum of physical distance Di；
Iii. it chooses to being currently generated the maximum candidate terrestrial station of the sum of interior all earth station's physical distances of group and be added to and works as
Previous existence is interior in groups；
Iv. i-iii step is repeated, until currently organizing 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 to be grouped.
When earth station is grouped, when face station quantity is 1 to each group, only belonged between all earth stations at this time
Synchronizing information, the i.e. update of the network site of terminal unique identification and registration earth station, effect is equal to earth station not at this time
Grouping；It is synchronous that real-time precise position information is only carried out when all earth stations are divided into 1 group, between all earth stations, i.e., eventually
It holds unique identification and its accesses the synchronization of the network site of satellite.Above-mentioned terminal is mobile terminal.
Compared with the prior art, the advantages of the present invention are as follows:
1, this method has preferable scalability.It, can be effectively using the distributed location management based on earth station
Performance bottleneck is avoided, processing load is distributed at multiple earth stations, while having accomplished nearest location management thought.
2, this method has more optimized routed path.Using distributed location management so that location management anchor point away from
It is closer from terminal, so that having more optimal transmission path when data message forwarding in the overall situation, avoid excessive
Occupy satellite network bandwidth.
3, this method has better robustness.Since location management is distributed to multiple earth stations, centralization is avoided
In management the problem of single point failure, the flexible division of location management is realized.
4, 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, by adjusting the granularity of location information synchronizing in location management, and then realize not
Same travelling performance is supported.
Detailed description of the invention
Fig. 1 is satellite network location management system frame schematic diagram；
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 distributed location management system schematic diagram of the satellite network based on earth station.Terminal first passes through
Satellite 1 accesses satellite network, and by access satellite according to terminal position directorial area, at corresponding earth station A, carry out position
Set information registering.After earth station A receives location updating message, synchronously control skill is managed using the distributed location that the present invention uses
Art carries out location information synchronizing with other earth stations B, C, D etc. by satellite network.
It assumes 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 was accessed in certain satellite initiation
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 for the first time registration information in local management area, judge whether to initiate global renewal process:
1) if not registration for the first time and there is no use packet positions management strategy, the i.e. only local accurate position of real-time servicing
(terminals physical identify+access network site) management is set, external earth station only stores the attaching information of local terminal, then do not need
Carry out global update.
2) if terminal is not to register and use for the first time packet positions management strategy, precise position information is led in real time
Accuse other earth stations in same group.
3) if it is registering for the first time, then it is communicated to the whole network earth station.For other earth stations outside group, then ownership position is noticed
Confidence breath, i.e. registration earth station location and terminals physical mark.
Fig. 3 is to initiate process flow when global update using under grouping strategy.Earth station receives new registration message
Afterwards, when initiating renewal process, 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 the basic process under the distributed location management strategy, when using position enquiring.Nonlocal terminal is being initiated
When with local terminal conversation procedure, position enquiring message can first pass around access satellite, be sent to nonlocal terminal present position pipe
At the earth station for managing area, judged by earth station, if purpose terminal exact position is locally stored, direct return position is looked into
Ask response.Otherwise, earth station's storage is purpose terminal attaching location information, then query message is redirected to storage purpose end
At the earth station for holding exact position, the earth station of directorial area where earth station here can be purpose terminal is also possible to same
Purpose endpoint to register earth station belongs to the earth station of a group.When redirecting position enquiring message, standard is made with delay, is chosen
Nearest earth station redirects.
It needs exist for emphasizing, in the location management based on IPv6, without location query function, data message exists
It is directly transmitted at terminal without location resolution, under this condition, satellite is accessed in not storage purpose terminal location routing iinformation,
First by data redirection to local ground station, if local ground station stores precise position information, directly to message into
Row address replacement is sent to purpose terminal, otherwise by message redirecting at the nearest earth station for storing exact position, in turn
Re-send to purpose terminal.
Grouping algorithm when Fig. 5 is using grouping strategy.The algorithm is based on greedy thought, changes to all earth stations
In generation, successively chooses earth station from the set of candidate terrestrial station, after traversing each time, chooses an earth station and be added to new grouping
Interior, until candidate terrestrial station, collection is combined into sky, and process is as follows:
1) earth station GW is choseni, it is calculated to the sum of the physical distance of all earth stations in current organize Di。
If 2) DiGreater than current candidate earth station GWcurReach the sum of current all earth station's physical distances Dcur, or
DcurNo initializtion, then by GWiAs new candidate terrestrial station.
3) 1,2 steps are repeated, until iteration is passed through by all earth stations, 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, repeats 1-3 step.
5) 1-4 step is repeated, until whole earth stations all complete to be grouped.
Claims (3)
1. a kind of satellite network manages synchronisation control means based on the distributed location of earth station, it is characterised in that include following step
It is rapid:
A, location management Division: the coverage area by satellite network on ground is divided into several location management areas, so that each
Dou Youyige earth station in region, the access terminal location information management being responsible in the region by the earth station；
B, terminal carries out position information registration by satellite: when there is terminal to access satellite network, generating the end by access satellite
Mapping between the location information at end, i.e. terminal iidentification and access point network position, the ground in location management area belonging to terminal
Face station carries out position information registration, which includes unique identification and its network site for accessing satellite of terminal；When
Access satellite of the terminal in satellite network changes, when being switched to another inserting of satellite from a satellite, yet by
New access satellite generates new location information and carries out position information registration in the earth station of belonging positions directorial area；
C, the location information synchronizing between earth station: other earth stations of registration earth station by terminal positional information in satellite network
Place synchronizes；Earth station is grouped by synchronization policy first, to its belonging to earth station in same group, synchronize accurate position
Confidence breath, the i.e. network site of terminal unique identification and its access satellite；To the earth station outside affiliated group, synchronous attaching information,
That is the network site of terminal unique identification and registration earth station；Earth station is grouped by the synchronization policy；Grouping algorithm is based on
Greedy thought is successively iterated to not being grouped candidate terrestrial station, in each iteration, according to candidate terrestrial station to being currently generated group
The size of the sum of the physical distance of interior all earth stations is compared, and choosing, there is the earth station of maximum distance, which to be added to, works as previous existence
In in groups, until being finally completed whole groupings, detailed process is as follows for grouping algorithm:
A) face station number N to each group is determinedG；
B) it is directed to i-th group of earth station GiGeneration:
I. it if current group is sky, chooses any candidate terrestrial station and G is addedi；
Ii. if current group is not sky, from the set of candidate terrestrial station, earth station GW is successively choseni, calculate it and arrive and work as previous existence
The sum of physical distance of all earth stations D in groupsi；
Iii. it chooses to being currently generated the maximum candidate terrestrial station of the sum of interior all earth station's physical distances of group and be added to and works as previous existence
In in groups；
Iv. i-iii step is repeated, until currently organizing 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 to be grouped.
2. a kind of satellite network according to claim 1 manages synchronisation control means based on the distributed location of earth station,
It is characterized by: satellite, according to terminal present position directorial area, the earth station in respective area carries out position information registration；
When terminal is mobile, and position directorial area is caused to change, change can be also generated by accessing the earth station that satellite is registered
Change.
3. a kind of satellite network according to claim 1 manages synchronisation control means based on the distributed location of earth station,
It is characterized by:, when face station quantity is 1 to each group, only being carried out between all earth stations at this time when earth station is grouped
Attaching information is synchronous, i.e. the update of the network site of terminal unique identification and registration earth station, is equal at this time to earth station not
Grouping；It is synchronous that real-time precise position information is only carried out when all earth stations are divided into 1 group, between all earth stations, i.e., eventually
It holds unique identification and its accesses the synchronization of the network site of satellite.
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| US10085200B1 (en) * | 2017-09-29 | 2018-09-25 | Star Mesh LLC | Radio system using nodes with high gain antennas |
| CN108199763B (en) * | 2017-12-29 | 2019-01-22 | 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 |
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| CN111510203B (en) * | 2020-07-02 | 2020-09-29 | 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 |
| 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 |
| CN113824639B (en) * | 2021-09-06 | 2023-02-28 | 天地信息网络研究院(安徽)有限公司 | Satellite network label switching method of complexity at terminal |
| CN117833998A (en) * | 2024-03-04 | 2024-04-05 | 广东世炬网络科技有限公司 | Ground cell determining method, device, equipment and medium based on ground station |
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