- Do ce dO chinh xac yeu ca u8 vi cimg toe dO Me ip cho tat ca the net, tan so Bong b0 loi dOi v6i nit i each nit tham chieu hi hop li VI the ten hinh ta
t Mang ca ban nhu sau: Ben gui se giri heo chu ky me g6i (kang can hie danh diu nhan hin gian) vao kenh broadcas vi a ca cac ben nhan se danh dau Min
3.2 Phan loai va so sanh cac giao that dinh My&
Vein de djnh tuyen trong rating cam bien la mOt thich thirc lcho khan dui hei phai can biing gifta stir dap ung nhanh cos mang va hieu qua. Sy can biing nay you can sir can thiet thich hqp lchi Wing tinh tot va truyen din et cac net cam bien nguqc veri mao dau you cau thich img yen dieu kien nay.
Trong mang cam bien kung day, mao duqc do chinh la ltrqng bang thong duqc sir ding, lieu thi cong swat va yeu can xir ly ciut cac nut di dOng.Viec tim ra chien luqc can bin gifta sit canh tranh nay can thiet tao ra met nen tang chien luqc
Del He TWAng T.nng Al 7776 Thin Tang
djnh tuyen. Viec thiet ke cac giao thtic djnh tuyen trong mang cam ban lchong day phii xem xet gitri han ye :
+ C6ng suat va tai nguyen cim mcii nut raking.
+ Chit lugng thay del theo then gian ctia cac kenh vo tuyen. + Kha Jiang mat gei va tre.
Nham vao the yeu ciu thiet ke nay mOt so cac chien luqc djnh tuyen trong mong cam hien dirge dua ra. Bang (3.2) dua ra su phan loai mOt se giao thtic dtra teen nhieu tieu chi khic nhau, nei chung viec djnh tuyen trong WSN c6 the duge chia thinh
+ Loai thu nhit giao thirc djnh thy& thong qua lden true phing ( hay con gpi la giao thirc djnh tuyen ngang hang ) trong d6 cic nut c6 vai fro nhtr nhau. KiE'n trtic phing c6 mOt vai igi ich bao gem se lugng milo dau toi thieu de duy tri ca set ha tang, va c6 Icha nang kham phi ra nhieu clutmg gitta cac nut truyen din de chong lai 16i va tat ca the flat thutmg ce vai tr6 hok chirc nang nhu nhau.
+ Loai thu 2 la phan cap theo cum, lqi dung eau frac cfia mang de dat duct hieu qui ve Wing lugng, six en djnh, su ma rung. Trong loci giao that nay cic nut mang to t6 chirc thanh cac cum trong d6 mOt nut c6 muc nang luqng cao han cic nut khic va d6ng vai tr6 la nut chit. Ntit chit thuc hien phiii hqp hoot dOng trong cum va chuyen dip thong tin gifta cic cum vai nhau. Viec too thanh the cum c6 kha Wang lam giam tieu thu Ming luqng vi keo dal thei gian sting cid mpg.
+ Loai giao thirc dinh tuyen thu 3 la giao thirc djnh tuyen dip theo vj tri thy thutjc vao ciu true mang. Trong d6 vi tri ctia the nut cam hien dirge sir dung de djnh tuyen so lieu
Met giao thtic djnh tuyen dugc col la thich (mg neu cic tham se dm he thong c6 the dieu !chi& dirge de thich (mg vai cac tang thaii mang hien tai vi cic mtic !tang lugng lcha dung. Nfrang giao thirc nay cfmg cob the dirge chia thanh cic giao thirc djnh tuyen da throng, yeu ciu, h6i/dip, lien ket hoje dua vao QoS tuS , theo w the hoot dOng elm giao fink. Ngoai ra, cic giao thtic djnh tuyen c6 the dirge chia thanh ba lotti la chti dOng, tuang tic hoc lai ghep tuy thuOc vao each thirc ma nguEin tim (Wong tai
dich. Trong cic giao thirc chit dOng, tat ci cac dubng (kw tinh than truttc khi c6 you
ciu, trong khi deti yeti cic giao thirc tuang tic thl the dutmg dirge tinh toan theo yeu cau. Cac giao thtic lai ghep ket hop ca hai quy dc 6 ten. Khi cac nut cam hien oft djnh, ne thich hqp v6i cic giao thirc djnh tuyen theo bang han la vtti cac giao tithe tuang tic. MOt lugng cong suit ding ke dirge sir dung de tim &rang vi thiet lip cic
Ciu troc
--t— Clan axe
diang prcip ibex t m7
flei 1-1nr Thing 1.nng Al 7776 Tien Tiing
giao thirc Prong tic. MOt s6 giao thirc khic dva vio djnh than vi thong tin vi tri. De kith quit, c6 the sir dung phan log theo ciu tnic mpg vi co the hog dOng cna giao thirc (lieu chuan djnh tuyen) . Viec pit loai vi so sinh cac giao thirc djnh tuyen trong WSN ducrc chi ra trong Innh 3.1 vi 3.2.