CN109548169A - The optimal broadcast cycle calculation method of non-geo satellite communication system mobile management - Google Patents
The optimal broadcast cycle calculation method of non-geo satellite communication system mobile management Download PDFInfo
- Publication number
- CN109548169A CN109548169A CN201811625235.4A CN201811625235A CN109548169A CN 109548169 A CN109548169 A CN 109548169A CN 201811625235 A CN201811625235 A CN 201811625235A CN 109548169 A CN109548169 A CN 109548169A
- Authority
- CN
- China
- Prior art keywords
- mobile management
- optimal
- broadcast cycle
- communication system
- satellite communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
-
- 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
- H04B7/1851—Systems using a satellite or space-based relay
Abstract
The invention belongs to technical field of satellite communication, disclose a kind of optimal broadcast cycle calculation method of non-geo satellite communication system mobile management；The optimal broadcast cycle calculation method of non-geo satellite communication system mobile management is according to application scenarios, in a broadcast cycle TAGT_ADVInitial time, by satellite broadcasting relevant information, the Adding User number in the overlay area of triggering is N, these users need while starting mobility management process, to satellite contention access and sends mobile management solicited message in a manner of CDMA slotted ALOHA；In order to reduce due to overhead caused by competition conflict, the access performance of system is improved, the optimization aim expression formula of minimum average time expense is constructed, finds out the optimal user number of system at this time, and finds out optimal broadcast cycleThe present invention solve exist because in prior art non-geo satellite communication system while being broadcasted trigger generation mobile management business caused by contention access conflict, the problem of system access reduced performance.
Description
Technical field
The invention belongs to technical field of satellite communication more particularly to a kind of non-geo satellite communication system for moving
The optimal broadcast cycle calculation method of property management.
Background technique
Satellite communication refers to that relay node or communication node using artificial earth satellite as communication network are led to
The mode of letter.The emerging wireless communication technique to grow up on the basis of microwave communication and space technology.Satellite communication
, communication distance remote, message capacity big, communication line stable, high-quality the advantages that big with overlay area becomes to be studied now
Hot spot.The relative motion of non-geo satellite and terrestrial user in satellite communication system, causes user passively to generate shifting
Mobility management event.
At present it is commonly used in the trade in the prior art, the broadcast message that user sends generally according to satellite periodically, judge oneself
Body is passively handed over to new logical connection satellite from former logical connection satellite, then between user and new link satellite
By related Handshake Protocol and information exchange, the mobility position migration of user is completed.
However, when more terrestrial user gathers in a certain range, such as sensor network, there is a large number of users by new
The case where broadcast of satellite triggers and sends mobility management information to satellite simultaneously.Satellite communication system limited for resource
System, simultaneous mobile management business certainly will cause competition and conflict on limited access-in resource.Wherein, broadcast message
Period determine same time carry out mobile management contention access number of users, the number of users of competition is more, system processing
The expense of conflict is big, and the number of users of competition is few, and the set shared overhead waste of system is big.It is optimal in order to reach system performance,
The calculating that optimal broadcast cycle is carried out in mobility management process is meaningful.
In conclusion problem of the existing technology is: in prior art non-geo satellite communication system there are because
It is broadcasted triggering simultaneously and generates contention access conflict caused by mobile management business, the period broadcasted at this time is for system access
Performance has significant effect, it is therefore desirable to calculate optimal broadcast cycle.
The difficulty and meaning to solve the above problems: it in view of the above-mentioned problems, passing through the access expense expression formula of computing system, obtains
The broadcast cycle optimal to one, so that the access performance of system is optimal.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of non-geo satellite communication system mobility pipes
Manage optimal broadcast cycle calculation method.
The invention is realized in this way a kind of optimal broadcast cycle meter of non-geo satellite communication system mobile management
Calculation method, the optimal broadcast cycle calculation method of non-geo satellite communication system mobile management, a broadcast week
Phase TAGT_ADVInitial time, by satellite broadcasting relevant information, the number that Adds User in the overlay area of triggering is N, these use
Family needs while starting mobility management process, to satellite contention access and is sent mobile management in a manner of CDMA slotted ALOHA and asked
Seek information；In order to reduce due to overhead caused by competition conflict, the access performance of system is improved, minimum average time is constructed
The optimization aim expression formula of expense, finds out the optimal user number of system at this time, and finds out optimal broadcast cycle
Further, the optimal broadcast cycle calculation method of the non-geo satellite communication system mobile management is specifically wrapped
It includes:
The first step calculates mobile management and is averaged access request total degree.By non-isolated binary tree collision resolution algorithm,
N number of colliding data packet is then needed by average LNSecondary decomposition:
Wherein p is the probability that the left time slot of selection transmits, and 1-p is the probability that the right time slot of selection transmits.P takes under normal conditions
0.5, the decomposition number of formation is minimum.
The average access request total degree for so successfully completing mobile management task for N number of user indicates are as follows:
F (N)=LN+N；
Arrangement can obtain:
Second step calculates the time overhead for completing mobile management access request.The time overhead for enabling broadcast message is TB,
Single mobile management access request time overhead is TS, then the time of the mobile management access request for N number of user
Overhead indicates are as follows:
OV (N)=TB+F(N)*TS；
Then it is directed to the average time expense of each userAre as follows:
Arrangement obtains:
Third step calculates the competition number of users of optimal time expenseDue toAfter function is the first drop of variable N
The process of liter, for 1 step-length of unit in N integer value:
And D (N)=0 is enabled, it can obtain optimalMeet following formula:
It is solved, the competition number of users of optimal time expense can be obtained
4th step calculates optimal broadcast cycleThe number of users for increasing overlay area in broadcast cycle newly is expressed as:
N=S* ρ ≈ (Vorb*d*TAGT_ADV)*ρ；
Wherein S is the area for increasing overlay area in broadcast cycle newly, and d is the diameter of satellite coverage area, and ρ is terrestrial user
Density, VorbThe speed that nonstationary satellite flight causes terrestrial coverage area mobile；
So optimal broadcast cycleAre as follows:
Wherein M is that logic accesses channel number.
Further, the non-isolated binary tree collision resolution algorithm of the first step be user in a manner of CDMA slotted ALOHA to defending
Star sends the contention resolution algorithms used when mobile management solicited message clashes.
Further, what N number of user indicated in the first step is nonstationary satellite flight, in a broadcast cycle TAGT_ADV
It is interior, need to carry out the user of mobile management in the newly-increased overlay area of triggering.
Further, the 4th step Vorb*TAGT_ADV* d is indicated in a broadcast cycle TAGT_ADVInterior, triggering needs to carry out
The newly-increased overlay area area of mobile management.
Another object of the present invention is to provide a kind of application non-geo satellite communication system mobile management
The satellite communication system of optimal broadcast cycle calculation method.
In conclusion advantages of the present invention and good effect are as follows: according to application scenarios, in a broadcast cycle TAGT_ADV
Interior, the number of users for needing to carry out mobile management in the newly-increased overlay area of triggering is N, and N number of user needs while moving
Property management process to satellite contention access and sends mobile management solicited message in a manner of CDMA slotted ALOHA.In order to reduce due to
Overhead caused by competition conflicts, improves the access performance of system, constructs the optimization aim expression of minimum average time expense
Formula, finds out the optimal user number of system at this time, and finds out optimal broadcast cycleThe present invention solves the prior art
Exist in non-geo satellite communication system because of contention access caused by being broadcasted triggering generation mobile management business simultaneously
The problem of conflict, system access reduced performance.
Detailed description of the invention
Fig. 1 is the optimal broadcast cycle meter of non-geo satellite communication system mobile management provided in an embodiment of the present invention
Calculate method flow diagram.
Fig. 2 is application scenarios schematic diagram provided in an embodiment of the present invention.
Fig. 3 is emulation schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
As shown in Figure 1, the optimal broadcast of non-geo satellite communication system mobile management provided in an embodiment of the present invention
Period calculation method the following steps are included:
S101: it calculates mobile management and is averaged access request total degree；
S102: the time overhead for completing mobile management access request is calculated；
S103: the competition number of users of optimal time expense is calculated
S104: optimal broadcast cycle is calculated
Application principle of the invention is further described with reference to the accompanying drawing.
As shown in Fig. 2, nonstationary satellite flight causes the movement speed of terrestrial coverage area to be Vorb, a broadcast week
Phase TAGT_ADVInterior, the number of users in the mobile management region of triggering is N, this N number of user needs while carrying out mobile management
Process to satellite contention access and sends mobile management solicited message in a manner of CDMA slotted ALOHA.When the solicited message is rushed
When prominent, collision decomposition is carried out using non-isolated binary tree method.
(1) mobile management is calculated to be averaged access request total degree:
By non-isolated binary tree collision resolution algorithm it is found that N number of colliding data packet is then needed by average LNSecondary decomposition:
Wherein p is the probability that the left time slot of selection transmits, and 1-p is the probability that the right time slot of selection transmits.P takes under normal conditions
0.5, the decomposition number of formation is minimum.
The average access request total degree for so successfully completing mobile management task for N number of user indicates are as follows:
F (N)=LN+N (2)
(1) is substituted into (2), and arrange and can obtain:
(2) time overhead for completing mobile management access request is calculated:
The time overhead for enabling broadcast message is TB, single mobile management access request time overhead is TS, then being directed to N
The time overhead of the mobile management access request of a user indicates are as follows:
OV (N)=TB+F(N)*TS (4)
Then it is directed to the average time expense of each userAre as follows:
(3) are substituted into and are obtained into (5):
(3) the competition number of users of optimal time expense is calculated
Due toFunction be variable N first drop after rise process, for 1 step-length of unit in N integer value, enable:
(6) are substituted into (7), existing:
It enables D (N)=0, solution can obtain optimalMeet following formula:
It is solved, the competition number of users of optimal time expense can be obtained
(4) optimal broadcast cycle is calculated
The number of users for increasing overlay area in broadcast cycle newly is expressed as:
N=S* ρ ≈ (Vorb*d*TAGT_ADV)*ρ (9)
Wherein S is the area for increasing overlay area in broadcast cycle newly, and d is the diameter of satellite coverage area, and ρ is terrestrial user
Density, VorbThe speed for causing terrestrial coverage area mobile for nonstationary satellite flight；
So optimal broadcast cycleAre as follows:
Wherein M is that logic accesses channel number.
Application effect of the invention is explained in detail below with reference to emulation.
T is taken in emulationB=TS, (8) formula is calculated, and require the competition number of users of optimal time expenseIt is rounded, can obtainIt is rightFunction is drawn, from the figure 3, it may be seen that when optimal time expense competes number of usersWhen, expenseIt is minimum.
At this point, if Vorb=26600km/h, d=212.5km, M=400, ρ=100 people/km2.It is calculated
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of optimal broadcast cycle calculation method of non-geo satellite communication system mobile management, which is characterized in that institute
The optimal broadcast cycle calculation method of non-geo satellite communication system mobile management is stated according to application scenarios, is broadcasted at one
Cycle TAGT_ADVInitial time, by satellite broadcasting relevant information, the number that Adds User in the overlay area of triggering is N, these
User needs while starting mobility management process, to satellite contention access and sends mobile management in a manner of CDMA slotted ALOHA
Solicited message；In order to reduce due to overhead caused by competition conflict, the access performance of system is improved, minimum mean time is constructed
Between expense optimization aim expression formula, find out the optimal user number of system at this time, and find out optimal broadcast cycle
2. the optimal broadcast cycle calculation method of non-geo satellite communication system mobile management as described in claim 1,
It is characterized in that, the optimal broadcast cycle calculation method of non-geo satellite communication system mobile management specifically includes:
The first step calculates mobile management and is averaged access request total degree；It is N number of by non-isolated binary tree collision resolution algorithm
Colliding data packet is then needed by average LNSecondary decomposition:
Wherein p is the probability that the left time slot of selection transmits, and 1-p is the probability that the right time slot of selection transmits, and p takes 0.5 under normal conditions, shape
At decomposition number it is minimum；
The average access request total degree for so successfully completing mobile management task for N number of user indicates are as follows:
F (N)=LN+N；
Arrangement can obtain:
Second step calculates the time overhead for completing mobile management access request, and enabling the time overhead of broadcast message is TB, single
Mobile management access request time overhead is TS, then always being opened for the time of the mobile management access request of N number of user
Pin indicates are as follows:
OV (N)=TB+F(N)*TS；
Then it is directed to the average time expense of each userAre as follows:
Arrangement obtains:
Third step calculates the competition number of users of optimal time expenseDue toFunction be variable N first drop after rose
Journey, for 1 step-length of unit in N integer value:
And D (N)=0 is enabled, it can obtain optimalMeet following formula:
It is solved, the competition number of users of optimal time expense can be obtained
4th step calculates optimal broadcast cycleThe number of users for increasing overlay area in broadcast cycle newly is expressed as:
N=S* ρ ≈ (Vorb*d*TAGT_ADV)*ρ；
Wherein S is the area for increasing overlay area in broadcast cycle newly, and d is the diameter of satellite coverage area, and ρ is that terrestrial user is close
Degree, VorbThe speed for causing terrestrial coverage area mobile for nonstationary satellite flight；
So optimal broadcast cycleAre as follows:
Wherein M is that logic accesses channel number.
3. the optimal broadcast cycle calculation method of non-geo satellite communication system mobile management as claimed in claim 2,
It is characterized in that, the non-isolated binary tree collision resolution algorithm of the first step is that user is sent out in a manner of CDMA slotted ALOHA to satellite
The contention resolution algorithms for sending mobile management solicited message to use when clashing.
4. the optimal broadcast cycle calculation method of non-geo satellite communication system mobile management as claimed in claim 2,
It is characterized in that, what N number of user indicated in the first step is nonstationary satellite flight, in a broadcast cycle TAGT_ADVIt is interior,
Need to carry out the user of mobile management in the newly-increased overlay area of triggering.
5. the optimal broadcast cycle calculation method of non-geo satellite communication system mobile management as claimed in claim 2,
It is characterized in that, the 4th step Vorb*TAGT_ADV* d is indicated in a broadcast cycle TAGT_ADVInterior, triggering move
The newly-increased overlay area area of property management.
6. non-geo satellite communication system mobile management described in a kind of application Claims 1 to 5 any one is optimal wide
Broadcast the satellite communication system of period calculation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625235.4A CN109548169B (en) | 2018-12-28 | 2018-12-28 | Method for calculating optimal broadcast period of mobility management of non-stationary orbit satellite communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811625235.4A CN109548169B (en) | 2018-12-28 | 2018-12-28 | Method for calculating optimal broadcast period of mobility management of non-stationary orbit satellite communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109548169A true CN109548169A (en) | 2019-03-29 |
| CN109548169B CN109548169B (en) | 2021-10-01 |
Family
ID=65857830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811625235.4A Active CN109548169B (en) | 2018-12-28 | 2018-12-28 | Method for calculating optimal broadcast period of mobility management of non-stationary orbit satellite communication system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109548169B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140233444A1 (en) * | 2013-02-20 | 2014-08-21 | Qualcomm Incorporated | Systems and methods for wireless coexistence |
| US20140293866A1 (en) * | 2011-11-07 | 2014-10-02 | Kyocera Corporation | Mobile terminal and processor |
| CN105684515A (en) * | 2014-06-10 | 2016-06-15 | 奇点新源国际技术开发(北京)有限公司 | Mobile station, base station, wireless communication system and communication method |
| CN106549703A (en) * | 2016-10-26 | 2017-03-29 | 北京邮电大学 | The method and system of Incorporate network medium and low earth orbit satellites communication |
| CN106789340A (en) * | 2017-01-19 | 2017-05-31 | 西安电子科技大学 | Satellite network adaptive topology based on prediction finds and maintaining method |
-
2018
- 2018-12-28 CN CN201811625235.4A patent/CN109548169B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140293866A1 (en) * | 2011-11-07 | 2014-10-02 | Kyocera Corporation | Mobile terminal and processor |
| US20140233444A1 (en) * | 2013-02-20 | 2014-08-21 | Qualcomm Incorporated | Systems and methods for wireless coexistence |
| CN105684515A (en) * | 2014-06-10 | 2016-06-15 | 奇点新源国际技术开发(北京)有限公司 | Mobile station, base station, wireless communication system and communication method |
| CN106549703A (en) * | 2016-10-26 | 2017-03-29 | 北京邮电大学 | The method and system of Incorporate network medium and low earth orbit satellites communication |
| CN106789340A (en) * | 2017-01-19 | 2017-05-31 | 西安电子科技大学 | Satellite network adaptive topology based on prediction finds and maintaining method |
Non-Patent Citations (5)
| Title |
|---|
| LIU QIN: ""Delay-bounded and minimal transmission broadcast in LEO satellite networks"", 《IEEE》 * |
| ZHAOFENG WU: ""A Graph-Based Satellite Handover Framework for LEO Satellite Communication Networks"", 《IEEE》 * |
| 刘勤: ""面向动态外地代理的卫星网络移动性管理机制"", 《西安电子科技大学学报》 * |
| 张竹: ""IP/LEO卫星网络中的移动性管理技术研究"", 《信息科技辑》 * |
| 贺达健: ""LEO卫星通信网络的移动性管理"", 《中国空间科学技术》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109548169B (en) | 2021-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Ni et al. | MPBC: A mobility prediction-based clustering scheme for ad hoc networks | |
| Liu et al. | A-ADHOC: An adaptive real-time distributed MAC protocol for Vehicular Ad Hoc Networks | |
| Stanica et al. | Local density estimation for contention window adaptation in vehicular networks | |
| YANG et al. | Adaptive TDMA slot assignment protocol for vehicular ad-hoc networks | |
| Kumar et al. | A localized algorithm for clustering in cognitive radio networks | |
| Mansoor et al. | RARE: A spectrum aware cross-layer MAC protocol for cognitive radio ad-hoc networks | |
| Xie et al. | Energy-spectral efficiency optimization in vehicular communications: Joint clustering and pricing-based robust power control approach | |
| Chaurasia et al. | MPMAC: Clustering based MAC protocol for VANETs | |
| Zhang et al. | Design of analytical model and algorithm for optimal roadside AP placement in VANETs | |
| CN103079209A (en) | Cognitive wireless network topology reconstruction method and system | |
| Arora et al. | Vehicle to Vehicle (V2V) VANET based analysis on waiting time and performance in LTE network | |
| Lin et al. | An efficient message broadcasting MAC protocol for VANETs | |
| Abboud et al. | Impact of node mobility on single-hop cluster overlap in vehicular ad hoc networks | |
| Pei et al. | Low-complexity scheduling for wireless networks | |
| CN109548169A (en) | The optimal broadcast cycle calculation method of non-geo satellite communication system mobile management | |
| Aslam et al. | A flexible tdma overlay protocol for vehicles platooning | |
| CN106535231B (en) | Content transmission method for 5G user-oriented central network Cache deployment | |
| Chen et al. | A novel mobility-based clustering algorithm for VANETs | |
| Duan et al. | Cooperative channel assignment for VANETs based on dual reinforcement learning | |
| Zhang et al. | Multi-Radio Multi-Channel (MRMC) Resource Optimization Method for Wireless Mesh Network. | |
| Buratti | A mathematical model for performance of IEEE 802.15. 4 beacon-enabled mode | |
| Qin et al. | Parameter optimization for neighbor discovery probability of ad hoc network using directional antennas | |
| Kumar et al. | Energy efficient probabilistic broadcasting for mobile ad-hoc network | |
| CN104618981A (en) | Position and direction based priority routing method in delay tolerant network (DTN) environment | |
| Liu | The study of the handoff for the wireless network |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |