CN106019219B - Wireless sensor network intelligent distance-measuring localization method - Google Patents
Wireless sensor network intelligent distance-measuring localization method Download PDFInfo
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- CN106019219B CN106019219B CN201610338902.5A CN201610338902A CN106019219B CN 106019219 B CN106019219 B CN 106019219B CN 201610338902 A CN201610338902 A CN 201610338902A CN 106019219 B CN106019219 B CN 106019219B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
- G01S11/02—Systems for determining distance or velocity not using reflection or reradiation using radio waves
- G01S11/06—Systems for determining distance or velocity not using reflection or reradiation using radio waves using intensity measurements
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
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- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to wireless sensor network location technologies, are specially wireless sensor network intelligent distance-measuring localization method.Solve the problems, such as that prior art positioning accuracy is low and algorithm is complicated.The method of the invention determines unknown node and the relative position of beaconing nodes first with area value, by establishing coefficientT A 、T B 、T C With the method for regional relation, the coordinate of direct solution unknown node P has simultaneously carried out coordinate value optimization；Secondly, user's group hunting algorithm of the present invention（SOA）Further optimization has been carried out to the coordinate value being obtained.It is compared by simulation analysis and with some other algorithms, the method for the invention improves the precision of algorithm, reduces the complexity of algorithm, reduces the energy expenditure of node, extends the life cycle of node.
Description
Technical field
The present invention relates to wireless sensor network location technologies, are specially wireless sensor network intelligent distance-measuring positioning side
Method.It is mainly used in obtaining the accurate location information of sensor node in wireless sensor network.
Background technology
Technology of Internet of things constantly obtains new achievement in recent years, has applied to national defense and military, environmental monitoring, traffic pipe
Reason, health care, manufacturing industry, the fields such as provide rescue and relief for disasters and emergencies, the wireless sensor network as one of Internet of Things bottom important technology
Have become research hotspot.Wherein, it is that wireless sensor network is very heavy to obtain accurate location information by location algorithm
The content wanted.
Intelligent algorithm obtains higher attention recently, for optimizing original algorithm, e.g., using immune genetic algorithm to base
It optimizes in the trilateration of RSSI, DV-HOP algorithms is optimized using particle cluster algorithm, sought by continuous iteration
It is excellent to improve positioning accuracy.These intelligent algorithms can be used to improve positioning accuracy, but need to carry out substantial amounts of iteration fortune
It calculates." wireless sensor network distance measurement localization method " is combined by the present invention with crowd's searching algorithm so that only needs a small amount of change
Positioning accuracy can be further improved for computing.
The content of the invention
The present invention solves the problems, such as that existing algorithmic technique positioning accuracy is low and related intelligent algorithm iterations is more, provides one
Kind wireless sensor network intelligent distance-measuring localization method.
The present invention adopts the following technical scheme that realization：Wireless sensor network intelligent distance-measuring localization method, is by such as
What lower step was realized：
Z1:Unknown node P receives the signal of surrounding beaconing nodes, and the signal strength values received are converted into unknown section
The distance between point and beaconing nodes value；
Z2:It sets unknown node P and receives the anchor node number of signal as m, m≤3 are not conllinear with wantonly 3 positions
Beaconing nodes for one group, k groups altogether；
Z3：From first group of beaconing nodes until kth group beaconing nodes calculate the coordinate of unknown node P successively, one there are
To k coordinate, (x is expressed asp1,yp1) ... ... (xpk,ypk).Wherein u groups beaconing nodes are chosen, u values are 1 to k, will
This group of beaconing nodes are set as A, B, C, calculate the coordinate (x of unknown node Ppu,ypu), it is one of above-mentioned k coordinate.3 letters
Entire plane is divided into seven regions by mark node A, B, C：
Region 1：The triangle interior region that 3 beaconing nodes A, B, C are formed；
Region 2：Straight line, beaconing nodes A and beacon beyond the A points for the ray BA that beaconing nodes B and beaconing nodes A is formed
The region that straight line beyond the C points for the ray BC that line segment AC, the beaconing nodes B and beaconing nodes C that node C is formed are formed surrounds；
Region 3：Straight line, beaconing nodes A and beacon beyond the B points for the ray CB that beaconing nodes C and beaconing nodes B is formed
The region that straight line beyond the A points for the ray CA that line segment AB, the beaconing nodes C and beaconing nodes A that node B is formed are formed surrounds；
Region 4：Straight line, beaconing nodes B and beacon beyond the B points for the ray AB that beaconing nodes A and beaconing nodes B is formed
The region that straight line beyond the C points for the ray AC that line segment BC, the beaconing nodes A and beaconing nodes C that node C is formed are formed surrounds；
Region 5：Straight line, beaconing nodes A and beacon beyond the C points for the ray BC that beaconing nodes B and beaconing nodes C is formed
The region that straight line beyond the C points for the ray AC that node C is formed surrounds；
Region 6：Straight line, beaconing nodes A and beacon beyond the B points for the ray CB that beaconing nodes C and beaconing nodes B is formed
The region that straight line beyond the B points for the ray AB that node B is formed surrounds；
Region 7：Straight line, beaconing nodes C and beacon beyond the A points for the ray BA that beaconing nodes B and beaconing nodes A is formed
The region that straight line beyond the A points for the ray CA that node A is formed surrounds；
Z4:Determine region residing for unknown node P：
Meet formula：SABC=SABP+SACP+SBCPUnknown node P is in region 1；
Meet formula：SABP+SBCP=SABC+SACPUnknown node P is in region 2；
Meet formula：SACP+SBCP=SABC+SABPUnknown node P is in region 3；
Meet formula：SACP+SABP=SABC+SBCPUnknown node P is in region 4；
Meet formula：SABP=SACP+SABC+SBCPUnknown node P is in region 5；
Meet formula：SACP=SABP+SABC+SBCPUnknown node P is in region 6；
Meet formula：SBCP=SACP+SABC+SABPUnknown node P is in region 7；
Wherein S is the area of the corresponding triangle calculated using Heron's formula, and three letters in S subscripts are triangle
Three vertex.
Z5：U-th of coordinate (x of unknown node Ppu,ypu) calculation formula it is as follows：
xpu=TA·xa+TB·xb+TC·xc
ypu=TA·ya+TB·yb+TC·yc
Wherein, (xa,ya) be beaconing nodes A coordinate, (xb,yb) be beaconing nodes B coordinate, (xc,yc) it is beacon section
The coordinate of point C；TA、TB、TCIt is related with P points region for coefficient of region.
When unknown node P is in region 1,
When unknown node P is in region 2,
When unknown node P is in region 3,
When unknown node P is in region 4,
When unknown node P is in region 5,
When unknown node P is in region 6,
When unknown node P is in region 7,
Z6:Using crowd's searching algorithm to obtained k coordinate (xp1,yp1) ... ... (xpk,ypk) optimize, it obtains excellent
The coordinate of unknown node P after change.
The fitness function of crowd's searching algorithm is：
Coordinate (x in formulas,ys) represent k coordinate (xp1,yp1) ... ..., (xpk,ypk) in any one coordinate, coordinate (xi,
yi) for any one coordinate in m beaconing nodes；diRepresent the distance value described in step Z1；In k obtained fitness letter
In numerical value F, minimum value is selected.
Conventionally known crowd's searching algorithm (SOA) is at least in title《MATLAB optimization algorithm analyses of cases
With application》, published by publishing house of Tsinghua University, author Yu Shengwei, the publication date has in detail on the publication in September, 2014
It is thin open.
The method of the invention determines unknown node and the relative position of beaconing nodes first with area value, is by establishing
Number TA、TB、TCWith the method for regional relation, the coordinate of direct solution unknown node P has simultaneously carried out coordinate optimizing.Secondly, the present invention
The coordinate value of unknown node P of the user's group hunting algorithm (SOA) to being obtained has carried out further optimization；Crowd, which searches for, to be calculated
Method is a kind of heuristic random searching algorithm based on population.Localization method proposed by the present invention is improving the same of positioning accuracy
When also reduce the iterations of algorithm.It is compared by simulation analysis and with some other algorithms, it is of the present invention
Method improves the precision of algorithm, reduces the complexity of algorithm, reduces the energy expenditure of node, extends the Life Cycle of node
Phase.
Description of the drawings
Fig. 1 is the schematic diagram that entire plane is divided into seven regions by step Z3 tri- beaconing nodes A, B, C.
Specific embodiment
Wireless sensor network intelligent distance-measuring localization method, is realized by following steps：
Z1:Unknown node P receives the signal of surrounding beaconing nodes, and the signal strength values received are converted into unknown section
The distance between point and beaconing nodes value；Here convert using well known logarithm-constant wireless signal propagation model.
Z2:It sets unknown node P and receives the anchor node number of signal as m, m≤3 are not conllinear with wantonly 3 positions
Beaconing nodes for one group, k groups altogether；
Z3：From first group of beaconing nodes until kth group beaconing nodes calculate the coordinate of unknown node P successively, one there are
To k coordinate, (x is expressed asp1,yp1) ... ... (xpk,ypk).Wherein u groups beaconing nodes are chosen, u values are 1 to k, will
This group of beaconing nodes are set as A, B, C, calculate the coordinate (x of unknown node Ppu,ypu) it is one of above-mentioned k coordinate.3 letters
Entire plane is divided into seven regions by mark node A, B, C：
Region 1：The triangle interior region that 3 beaconing nodes A, B, C are formed；
Region 2：Straight line, beaconing nodes A and beacon beyond the A points for the ray BA that beaconing nodes B and beaconing nodes A is formed
The region that straight line beyond the C points for the ray BC that line segment AC, the beaconing nodes B and beaconing nodes C that node C is formed are formed surrounds；
Region 3：Straight line, beaconing nodes A and beacon beyond the B points for the ray CB that beaconing nodes C and beaconing nodes B is formed
The region that straight line beyond the A points for the ray CA that line segment AB, the beaconing nodes C and beaconing nodes A that node B is formed are formed surrounds；
Region 4：Straight line, beaconing nodes B and beacon beyond the B points for the ray AB that beaconing nodes A and beaconing nodes B is formed
The region that straight line beyond the C points for the ray AC that line segment BC, the beaconing nodes A and beaconing nodes C that node C is formed are formed surrounds；
Region 5：Straight line, beaconing nodes A and beacon beyond the C points for the ray BC that beaconing nodes B and beaconing nodes C is formed
The region that straight line beyond the C points for the ray AC that node C is formed surrounds；
Region 6：Straight line, beaconing nodes A and beacon beyond the B points for the ray CB that beaconing nodes C and beaconing nodes B is formed
The region that straight line beyond the B points for the ray AB that node B is formed surrounds；
Region 7：Straight line, beaconing nodes C and beacon beyond the A points for the ray BA that beaconing nodes B and beaconing nodes A is formed
The region that straight line beyond the A points for the ray CA that node A is formed surrounds；
Z4:Determine region residing for unknown node P：
Meet formula：SABC=SABP+SACP+SBCPUnknown node P is in region 1；
Meet formula：SABP+SBCP=SABC+SACPUnknown node P is in region 2；
Meet formula：SACP+SBCP=SABC+SABPUnknown node P is in region 3；
Meet formula：SACP+SABP=SABC+SBCPUnknown node P is in region 4；
Meet formula：SABP=SACP+SABC+SBCPUnknown node P is in region 5；
Meet formula：SACP=SABP+SABC+SBCPUnknown node P is in region 6；
Meet formula：SBCP=SACP+SABC+SABPUnknown node P is in region 7；
Wherein S is the area of the corresponding triangle calculated using Heron's formula, and three letters in S subscripts are triangle
Three vertex；
The Heron's formula is common knowledge：
In formula：S is triangle area, and it is long that L1, L2, L3 represent three sides of a triangle.
Z5：U-th of coordinate (x of unknown node Ppu,ypu) calculation formula it is as follows：
xpu=TA·xa+TB·xb+TC·xc
ypu=TA·ya+TB·yb+TC·yc
Wherein, (xa,ya) be beaconing nodes A coordinate, (xb,yb) be beaconing nodes B coordinate, (xc,yc) it is beacon section
The coordinate of point C；TA、TB、TCIt is related with P points region for coefficient of region.
When unknown node P is in region 1,
When unknown node P is in region 2,
When unknown node P is in region 3,
When unknown node P is in region 4,
When unknown node P is in region 5,
When unknown node P is in region 6,
When unknown node P is in region 7,
Z6:Using crowd's searching algorithm to obtained k coordinate (xp1,yp1) ... ... (xpk,ypk) optimize, it obtains excellent
The coordinate of unknown node P after change；
The fitness function of crowd's searching algorithm is：
Coordinate (x in formulas,ys) represent k coordinate (xp1,yp1) ... ..., (xpk,ypk) in any one coordinate, coordinate (xi,
yi) for any one coordinate in m beaconing nodes；diRepresent the distance value described in step Z1；In k obtained fitness letter
In numerical value F, minimum value is selected.
Claims (1)
1. a kind of wireless sensor network intelligent distance-measuring localization method, it is characterised in that realized by following steps：
Z1:Unknown node P receive surrounding beaconing nodes signal, and by the signal strength values received be converted into unknown node and
The distance between beaconing nodes value；
Z2:It sets unknown node P and receives the anchor node number of signal as m, m≤3, with the not conllinear letter in wantonly 3 positions
It is one group to mark node, altogether k groups；
Z3：From first group of beaconing nodes until kth group beaconing nodes calculate the coordinate of unknown node P successively, one is obtained k
Coordinate is expressed as (xp1,yp1) ... ... (xpk,ypk)；Wherein u groups beaconing nodes are chosen, u values are 1 to k, by the group
Beaconing nodes are set as A, B, C, calculate the coordinate (x of unknown node Ppu,ypu) it is one of above-mentioned k coordinate；3 beacon sections
Entire plane is divided into seven regions by point A, B, C：
Region 1：The triangle interior region that 3 beaconing nodes A, B, C are formed；
Region 2：Straight line, beaconing nodes A and beaconing nodes beyond the A points for the ray BA that beaconing nodes B and beaconing nodes A is formed
The region that straight line beyond the C points for the ray BC that line segment AC, the beaconing nodes B and beaconing nodes C that C is formed are formed surrounds；
Region 3：Straight line, beaconing nodes A and beaconing nodes beyond the B points for the ray CB that beaconing nodes C and beaconing nodes B is formed
The region that straight line beyond the A points for the ray CA that line segment AB, the beaconing nodes C and beaconing nodes A that B is formed are formed surrounds；
Region 4：Straight line, beaconing nodes B and beaconing nodes beyond the B points for the ray AB that beaconing nodes A and beaconing nodes B is formed
The region that straight line beyond the C points for the ray AC that line segment BC, the beaconing nodes A and beaconing nodes C that C is formed are formed surrounds；
Region 5：Straight line, beaconing nodes A and beaconing nodes beyond the C points for the ray BC that beaconing nodes B and beaconing nodes C is formed
The region that straight line beyond the C points for the ray AC that C is formed surrounds；
Region 6：Straight line, beaconing nodes A and beaconing nodes beyond the B points for the ray CB that beaconing nodes C and beaconing nodes B is formed
The region that straight line beyond the B points for the ray AB that B is formed surrounds；
Region 7：Straight line, beaconing nodes C and beaconing nodes beyond the A points for the ray BA that beaconing nodes B and beaconing nodes A is formed
The region that straight line beyond the A points for the ray CA that A is formed surrounds；
Z4:Determine region residing for unknown node P：
Meet formula：SABC=SABP+SACP+SBCPUnknown node P is in region 1；
Meet formula：SABP+SBCP=SABC+SACPUnknown node P is in region 2；
Meet formula：SACP+SBCP=SABC+SABPUnknown node P is in region 3；
Meet formula：SACP+SABP=SABC+SBCPUnknown node P is in region 4；
Meet formula：SABP=SACP+SABC+SBCPUnknown node P is in region 5；
Meet formula：SACP=SABP+SABC+SBCPUnknown node P is in region 6；
Meet formula：SBCP=SACP+SABC+SABPUnknown node P is in region 7；
Wherein S is the area of the corresponding triangle calculated using Heron's formula, and three letters in S subscripts are three of triangle
Vertex；
Z5：U-th of coordinate (x of unknown node Ppu,ypu) calculation formula it is as follows：
xpu=TA·xa+TB·xb+TC·xc
ypu=TA·ya+TB·yb+TC·yc
Wherein, (xa,ya) be beaconing nodes A coordinate, (xb,yb) be beaconing nodes B coordinate, (xc,yc) for beaconing nodes C's
Coordinate；TA、TB、TCIt is related with P points region for coefficient of region,
When unknown node P is in region 1,
When unknown node P is in region 2,
When unknown node P is in region 3,
When unknown node P is in region 4,
When unknown node P is in region 5,
When unknown node P is in region 6,
When unknown node P is in region 7,
Z6:Using crowd's searching algorithm to obtained k coordinate (xp1,yp1) ... ... (xpk,ypk) optimize, after obtaining optimization
Unknown node P coordinate；
The fitness function of crowd's searching algorithm is：
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Coordinate (x in formulas,ys) represent k coordinate (xp1,yp1) ... ..., (xpk,ypk) in any one coordinate, coordinate (xi,yi)
For any one coordinate in m beaconing nodes；diRepresent the distance value described in step Z1；In k obtained fitness function
In value F, minimum value is selected.
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