CN106788678B - A kind of star that seizing channel reservation based on time ground method for switching network - Google Patents
A kind of star that seizing channel reservation based on time ground method for switching network Download PDFInfo
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- CN106788678B CN106788678B CN201611165012.5A CN201611165012A CN106788678B CN 106788678 B CN106788678 B CN 106788678B CN 201611165012 A CN201611165012 A CN 201611165012A CN 106788678 B CN106788678 B CN 106788678B
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- cell
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- satellite cell
- channel reservation
- switched
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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
- H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
- H04B7/18541—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection for handover of resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/26—Resource reservation
Abstract
A kind of the present invention provides star for seizing channel reservation based on the time method for switching network, cell I and cell III are the cells of two ground networks in this strategy, cell II is satellite network cell, cell I is all cell intersections containing the user for wanting switch satellite network, and cell III is the intersection of all satellite network user cells to be switched to.Without common signal channel can be used in cell II, the only remaining channel reservation specially used to switching, and when cell II has new calling access request, system can seize channel reservation according to the decision rule of this strategy to receive this new calling to access.The strategy is based on channel reservation, based on the pre-switch time, under the premise of not influencing the performance of handoffs of a upper cell, the idle channel reservation whether new calling party can seize in this cell is judged, to reduce new call blocking rate, raising satellite resource utilization rate.
Description
Technical field:
The present invention relates to star Network Convergence Technology field, in particular to it is a kind of that channel reservation star earth mat is seized based on the time
Network switching method.
Background technique:
Application of the few people in view of satellite in the research of conventional mobile communications at present.However satellite has covering model
It encloses extensively, covering wave beam is big, networking flexibility, communicates the advantages that not limited by geographical environment, and the whole world that real meaning may be implemented is moved
Dynamic communication, including in the outlying district that terrestrial cellular network does not cover, desert, He Hai, polar region, space.So by defending
The support of star communication, may be implemented the globalization, synthesization and personalized main target of mobile communication system, can be to user
Bigger capacity, bigger bandwidth and cleverer service living are provided.With the development of two technologies, to realize, really the whole world is seamless
The mobile communication system of covering mutually merges land mobile network with satellite mobile communication network, it would be possible to become not
Carry out a main trend of mobile communication system development.
Although currently, for star converged network culminant star internetwork switching strategy and the research of algorithm be unfolded
For a long time, but disclosed research achievement and document resource be also seldom.2006, mobile-satellite risk company, the U.S. (MSV,
Mobile Satellite Venture) disclosed in it in patent of invention, it proposes a kind of based on ground and space
Handoff technique, this switching method adjudicate end by the receiving of comprehensive descision signal, transmitting and disturbed condition three aspect factor
End should access satellite network or ground network.When terminal is in the region that satellite network and ground network collectively cover,
When only terminal meets the transmission power and interference threshold values condition of tactful defined simultaneously, terminal can just access ground network, no
Then just it is linked into satellite network.Although for star the related ends of network switching are seldom at present, people are to individual ground
The research of the switching of network and satellite network does not stop always, therefore, can according to existing classical switching method, in conjunction with
Star the own characteristic of converged network improve, with designing suitable star internetwork switching method.
Star between network handoff scenario will have very much: the user in high-speed mobile should use up to reduce frequent switching
Possibly it is switched to satellite network；In the edge in terrestrial network coverage area domain, user is to guarantee that communication capacity also needs to be switched to
Satellite network；In emergency occasion, when ground network is paralysed because of natural calamity or other factors, user will also be switched to satellite
In network, therefore the switching problem between research satellite mobile network and Land-Mobile-Network, it allows users to rapidly and efficiently
Ground with the completing star switching between network, realize between satellite mobile network and Land-Mobile-Network it is seamless merge, be very
It is necessary.
Summary of the invention:
A kind of present invention star that channel reservation is seized based on the time is provided method for switching network, it is intended to improving star network
The problem of resource waste that channel reservation is not available when causing because of channel reservation without switching calling in switching.Present invention foundation is cut
The pre-switch time for using family instead judges the service condition of channel reservation, and new calling can seize channel reservation to be communicated, and improves
Resource utilization.
In order to achieve the above-mentioned object of the invention, the technical solution used in the present invention are as follows:
A kind of star that seizing channel reservation based on time ground method for switching network, the star network include ground network
And satellite network, ground network and satellite network share a core net, the region of ground network covering is known as terrestrial cells, defends
The region of the star network coverage is known as satellite cell；Characterized by comprising the following steps:
(1) when the new calling from terrestrial cells reaches satellite cell, satellite cell combines switching row according to channel reservation
Team's strategy distributes channel, if be allocated successfully, by the new channel access called by distributing to satellite cell, new calling is accessed
Success, terminates this process；Otherwise step (2) are jumped to；
(2) whether have available idle channel reservation, if so, then jumping to step (3), otherwise if checking in satellite cell
This new calling is rejected, and terminates this process；
(3) it calculates in the pre-switch time and satellite cell for be switched to earliest in terrestrial cells the user of satellite cell most
Early to be switched to the time difference of the pre-switch time of the user of terrestrial cells；
(4) whether the time difference in judgment step (3) is greater than 0, otherwise jumps to if it is, jumping to step (8)
Step (5)；
(5) available idle channel reservation number in satellite cell is counted；
(6) it calculates the maximum pre-switch time that be switched to the preceding n user of satellite cell in terrestrial cells and satellite is small
The time difference of the pre-switch time of the user of terrestrial cells is switched in area earliest；Wherein n is idle channel reservation number；
(7) whether the time difference in judgment step (6) is greater than 0, if it is, step (8) are jumped to, otherwise, this calling
It is rejected, terminates this process；
(8) new calling is linked into satellite cell by idle channel reservation, new calling is successfully accessed.
Wherein, step (3) specifically:
Judge that terrestrial cells will be switched to the pre-cut of user of satellite cell according to the position and speed information of user
Change the time and satellite cell to be switched to terrestrial cells user the pre-switch time, respectively T11, T12, T13...T1mAnd T21,
T22, T23...T2m；
It calculates in the pre-switch time that be switched to the user of satellite cell in terrestrial cells earliest and satellite cell earliest
It is switched to the time difference of the pre-switch time of the user of terrestrial cells: Δ T=T1-T2；Wherein T1=min { T11, T12,
T13...T1m, T2=min { T21, T22, T23...T2m}。
Wherein, step (6) specifically:
The preceding n user times that be switched in satellite cell are respectively T ' in terrestrial cells11, T '12, T '13... T '1n；
Wherein n is idle channel reservation number；
In the maximum pre-switch time and satellite cell for calculating the preceding n user that be switched to satellite cell in terrestrial cells
It to be switched to the time difference of the pre-switch time of the user of terrestrial cells: Δ T '=T ' earliest1-T2, in formula, T '1=max { T '11,
T′12, T '13... T '1n, T2=min { T21, T22, T23...T2mIt is the use that be switched to terrestrial cells in satellite cell earliest
The pre-switch time at family.
It has the advantages that compared with the background technology, the present invention
1. the present invention is the improvement to channel reservation combination switching and queuing strategy, channel reservation and two kinds of strategies of switching and queuing
Combination can more effectively ensure performance of handoffs, improve resource utilization.
2. the present invention can seize idle available channel reservation using the pre-switch time, a upper cell is not being influenced
In the case that user switches, new calling access can seize available channel reservation to alleviate new call blocking rate.
3. the present invention in the case where not influencing switching calling access rate, allows new calling access to seize handoff reservation channel
It is interim to use, the wasting of resources caused by due to channel reservation is avoided, the overall performance of system is improved.
Detailed description of the invention:
Fig. 1 is application scenario diagram of the invention.
Fig. 2 is channel assignment procedures figure of the invention.
Specific embodiment:
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, it develops simultaneously implementation referring to Fig. 1-Fig. 2
Example, is described in further detail scheme of the invention.
As shown in Figure 1, cell I and cell III are terrestrial cells, cell II is satellite cell, idea of the invention is that: it is false
If there is new calling access request in cell II, and not no idle available common signal channel in cell II at this time, it only specializes in and cuts
Change the channel reservation used.System can decide whether that channel reservation can be seized according to the new strategy of this chapter to receive this new calling
Access.Judging process is as follows, and shown in Fig. 2 is channel assignment procedures of the invention:
(1) when the new calling from terrestrial cells reaches satellite cell, satellite cell combines switching row according to channel reservation
Team's strategy distributes channel, if be allocated successfully, by the new channel access called by distributing to satellite cell, new calling is accessed
Success, terminates this process；Otherwise step (2) are jumped to；
(2) whether have available idle channel reservation, if so, then jumping to step (3), otherwise if checking in satellite cell
This new calling is rejected, and terminates this process；
(3) it calculates in the pre-switch time and satellite cell for be switched to earliest in terrestrial cells the user of satellite cell most
Early to be switched to the time difference of the pre-switch time of the user of terrestrial cells；
Judge that terrestrial cells will be switched to the pre-cut of user of satellite cell according to the position and speed information of user
Change the time and satellite cell to be switched to terrestrial cells user the pre-switch time, respectively T11, T12, T13...T1mAnd T21,
T22, T23...T2m；
It calculates in the pre-switch time that be switched to the user of satellite cell in terrestrial cells earliest and satellite cell earliest
It is switched to the time difference of the pre-switch time of the user of terrestrial cells: Δ T=T1-T2；Wherein T1=min { T11, T12,
T13...T1m, T2=min { T21, T22, T23...T2m}；
(4) whether the time difference Δ T in judgment step (3) is greater than 0, otherwise jumps if it is, jumping to step (8)
To step (5)；As Δ T > 0, before illustrating to have user to be switched in cell II in cell I, existing subscriber is cut in cell II
It changes in cell III.So the channel reservation directly seized in cell II is given this new calling access and is had no effect in cell I
The performance of handoffs of user；As Δ T≤0, before illustrating to there is user to be switched in cell III in cell II, have in cell I
User is switched in cell II.The channel reservation in cell II cannot be directly seized at this time, and further progress to judge.
(5) available idle channel reservation number in satellite cell is counted；
(6) it calculates the maximum pre-switch time that be switched to the preceding n user of satellite cell in terrestrial cells and satellite is small
The time difference of the pre-switch time of the user of terrestrial cells is switched in area earliest；Wherein n is idle channel reservation number；
The preceding n user times that be switched in satellite cell are respectively T ' in terrestrial cells11, T '12, T '13... T '1n；
Wherein n is idle channel reservation number；
In the maximum pre-switch time and satellite cell for calculating the preceding n user that be switched to satellite cell in terrestrial cells
It to be switched to the time difference of the pre-switch time of the user of terrestrial cells: Δ T '=T ' earliest1-T2, in formula, T '1=max { T '11,
T′12, T '13... T '1n, T2=min { T21, T22, T23...T2mIt is the use that be switched to terrestrial cells in satellite cell earliest
The pre-switch time at family；
(7) whether the time difference in judgment step (6) is greater than 0, if it is, step (8) are jumped to, otherwise, this calling
It is rejected；
(8) new calling is linked into satellite cell by idle channel reservation, new calling is successfully accessed.
Working principle of the present invention: when a new calling access reaches, system combines switching row according to channel reservation first
Team's strategy calls distribution channel resource thus, if being allocated successfully, then this calling access starts to communicate using the resource got.But
It is, if failing access success thus according to channel reservation combination switching and queuing strategy distributes channel, to need to confirm at this time small
Idle available channel reservation number in area, if without available channel reservation, this call congestion, if still available free
Channel reservation can be used, then judges whether this calling can seize reserved switching channel according to the size of Δ T, if met strong
Condition is accounted for, then the channel that calling distribution is seized thus accesses time calling；When there is switching calling access to reach, system is sentenced first
In disconnected Target cell whether available free available common signal channel, if so, then switching calling distribution one is available public thus
Channel, if it is not, judging whether available free available channel reservation, if so, then switching calling distribution one can thus
Channel reservation, if it is not, continuing to judge, if having converted channel reservation, if so, then system can by force eventually
The longest communication of channel reservation time is only seized, the channel distribution that it is seized is to time switching calling, if it is not, this time
Switching request will be rejected.
It seizes strategy and seizes idle available channel reservation using the pre-switch time, in the use for not influencing a upper cell
In the case that family switches, to alleviate new call blocking rate.But since the user for seizing channel reservation in this cell is being switched to
It when next cell, is no difference with user existing in this cell, so competition same channel resource can be gone simultaneously, so meeting
The performance of handoffs of this cell is caused to decline, but influence is very small, within an acceptable range.After seizing strategy execution, although sentencing
The disconnected calling for seizing channel reservation out will not influence the switching user an of cell, but either new calling access is still cut
Change calling access be all it is random, this community user can be appeared in by, which just having, is switched to before next cell, and a upper cell is just
There is user to be switched to this cell, force termination is at this moment just needed to seize the communication of the user of channel reservation.Because of this communication money
Source, which is inherently seized, to be got, but this is probability event, and as a whole this strategy still improves the new calling of system
Energy and resource utilization.
Claims (2)
1. a kind of star for seizing channel reservation based on time ground method for switching network, the star network include ground network and
Satellite network, ground network and satellite network share a core net, and the region of ground network covering is known as terrestrial cells, satellite
The region of the network coverage is known as satellite cell；Characterized by comprising the following steps:
(1) when the new calling from terrestrial cells reaches satellite cell, satellite cell is according to channel reservation combination switching and queuing plan
Slightly distribute channel, if be allocated successfully, new calling by the channel access of distribution arrived into satellite cell, new calling access at
Function terminates this process；Otherwise step (2) are jumped to；
(2) whether have available idle channel reservation, if so, then jumping to step (3), otherwise this is new if checking in satellite cell
Calling is rejected, and terminates this process；
(3) it calculates and is wanted earliest in the pre-switch time and satellite cell for be switched to earliest in terrestrial cells the user of satellite cell
It is switched to the time difference of the pre-switch time of the user of terrestrial cells；
(4) whether the time difference in judgment step (3) is greater than 0, if it is, jumping to step (8) otherwise jumps to step
(5)；
(5) available idle channel reservation number in satellite cell is counted；
(6) in the maximum pre-switch time and satellite cell for calculating the preceding n user that be switched to satellite cell in terrestrial cells
It to be switched to the time difference of the pre-switch time of the user of terrestrial cells earliest；Wherein n is idle channel reservation number；
(7) whether the time difference in judgment step (6) is greater than 0, if it is, jumping to step (8), otherwise, this calling is refused
Absolutely, terminate this process；
(8) new calling is linked into satellite cell by idle channel reservation, new calling is successfully accessed；
The step (3) specifically:
When judging that terrestrial cells will be switched to the pre-switch of the user of satellite cell according to the position and speed information of user
Between and satellite cell to be switched to terrestrial cells user the pre-switch time, respectively T11, T12, T13…T1mAnd T21, T22,
T23…T2m；
It calculates the pre-switch time that be switched to the user of satellite cell in terrestrial cells earliest and to be cut earliest in satellite cell
Change to the time difference of the pre-switch time of the user of terrestrial cells: Δ T=T1-T2；Wherein T1=min { T11, T12, T13...T1m,
T2=min { T21, T22, T23...T2m}。
2. a kind of star that channel reservation is seized based on the time according to claim 1 method for switching network, feature exist
In step (6) specifically:
The preceding n user times that be switched in satellite cell are respectively T ' in terrestrial cells11, T '12, T '13... T '1n；Wherein n
For idle channel reservation number；
It calculates in the maximum pre-switch time that be switched to the preceding n user of satellite cell in terrestrial cells and satellite cell earliest
It is switched to the time difference of the pre-switch time of the user of terrestrial cells: Δ T '=T '1-T2, in formula, T '1=max { T '11, T
′12, T '13... T '1n, T2=min { T21, T22, T23...T2mIt is the user that be switched to terrestrial cells in satellite cell earliest
The pre-switch time.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107241134B (en) * | 2017-06-28 | 2020-09-11 | 东北大学 | Channel allocation method of low-earth-orbit satellite communication system |
| CN107592677B (en) * | 2017-09-19 | 2020-03-03 | 青岛海信电器股份有限公司 | Data transmission method and device |
| CN108964814A (en) * | 2018-07-11 | 2018-12-07 | 北京零重空间技术有限公司 | A kind of channel switching method of LEO satellite communication systems |
| CN111756454B (en) * | 2019-03-26 | 2021-12-03 | 华为技术有限公司 | Switching method and device in satellite communication |
| CN110072264B (en) * | 2019-05-28 | 2021-02-02 | 重庆邮电大学 | Low-orbit satellite system switching method |
| CN110493833B (en) * | 2019-08-29 | 2021-04-20 | 中国电子科技集团公司第五十四研究所 | Terminal autonomous switching control method for low-orbit satellite mobile communication system |
| CN114342469B (en) * | 2019-09-12 | 2024-01-30 | 华为技术有限公司 | Cell selection method and communication device |
| CN112383343B (en) * | 2020-11-10 | 2022-07-26 | 东方红卫星移动通信有限公司 | Channel dynamic reservation method and system based on geographical position of cluster user |
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