Thạc Sĩ Định tuyến trong mạng cảm biến và so sánh bằng mô phỏng

CHI O'NG 1. TONG QUAN MANG CAM BIEN KEIONG DAY
1.1 G161 thieu
Trong nhitng nom gin ctay, rit nhieu mang cam bien khong day da vi dang duqc
phit then vi then khai cho nhieu the irng dyng khic nhau nhu: theo d8i sly thay doi
cea mei trubng, !chi Mu, giim sit cic met ton van stir, phat hien vi do than viec tin
cong bang hat nhan' , sinh hoc vi hoi hoc, chuin doin sly hang hoc cita may mac, thief
N, theo diu vi giim sit cic bic sy, benh nhan cling nhu quitn 19 thu6c trong the benh
vien,theo dai vi dieu lchien giao thong, cic phucrng lien xe c0 .
Han nita vii sty tien be c8ng nghe gin day vi hei ty cea hg thong cic cong nghe
nhu Icy thu$t vi dien tu, cong nghe nano, giao flip khong day, cong nghe mach tich
hqp, vi mach phin cam hien, xir 19 vi tinh town tin hieu .da tao ra nhang con cam hien
c6 kich think nhe, da chtic !tang, gii thimh thip, cong suit lieu thy thip, layn tang lchi
nang img dyng rOng rai dui mang cam hien khong day.
MOt mang cam hien !thong day li met mang bao gem nhieu mit cam hien nhe c6
gii thimh thip, vi tieu thy Wing lucmg it, giao dip thong qua the ket n6i !thong day, c6
nhiem vy cam hien, do doe, tinh win nhiim myc dick thu th$p, tip trung dit lieu a dua
ra the quyet djnh town cyc ve mei trueng ty nhien .
Nherng not cam bien nhe bet My bao gom cic thinh
Cic 130 vi zit 19 rat nhe, b0 nhe glen han,b0 phin cam bien, be thu phit khong
day, nguan nuoi. Kich thu6c cua cic con cam bien nay thay dei tir to nhu hap giiy cho
den nhe nhu hat byi, thy thuetc vio tang irng ding.
Khi nghien cuu ye mang cam bien Wag day, met trong nhUng dic diem quan
tong vi then chat de li th&i gian song cea the con cam lien hay chinh la sly gi6i han
ve nitng luqng cea chting. Cic nut cam bien nay you ciu lieu thy cong suit thip. Cic
nit cam bien hoot dOng c6 gi6i han vi n6i chung la khong the thay the duqc ngu6n
cung cip. Do de, trong khi mang truyen thong tap trung vio dat duqc cic djch vy chit
luqng cao, thl the giao thirc mang cam bien phii tap trung diu lien vio bio town ding
suit.
Mang cam hien c6 met so dic diem sau:
+ CO 'chi Wing tlr t6 chirc.
+ Yeu ciu ft hoac khong c6 sy can thiep Oa con ngu&i.
+ Truyen thong ves tuyen vi truyen da buerc.
+ Trion khai so luqng lan tren pham vi rOng.
Chuyen de tat nghiep 1 tai HQr Thing I.nng Al777F Tign Time
+ Nang lugng, b0 nh6, !chi Wing xir ly c6 ham
+ Cau hlnh thin:mg xuyen thay d8i do m8i truirng hoc nut mpg.
+ Quang ba trong phi= vi hgp va djnh tuyen multihop.
Cac gi6i han ve mat nitng lugng, cong suit phat, b0 nh6 va cong suit tinh toan.
Chinh nhfing dac firth nay da dua ra nhftng chien luqc mei va nhang yeu ciu thay d6i
trong thiet Ice mpg cam bien.
1.2 C.Iu trfic mang cam bign
1.2.1 Cdc yiu to" dnh hurting din cdu trac mom cdm bun
Cac ciu trec hien nay cho mang Internet va man ad hoc khong day lchting
dimg duqcho mang cam hien kh8ng day, do mOt s6 15 , do sau:
õ S6 lugng cac nut cam bien trong mang cam hien c6 the ion gip nhieu lin s6
lugng nut trong mpg ad hoc.
õ Cac nut cam bien a bi 16i.
õ Ciu tic mpg cam bien thay d6i kha thtrimg xuyen.
õ Cac nut cam bien chti yeu sir dtmg truyen thong kieu quang ba, trong khi hiu
het cac mpg ad hoc diu dtra tren viec truyen diem-diem.
õ Cac nut cam bien bj gi6i han ye riling lugng, Icha riling firth town va b0 nh6.
õ Cac nut cam hien c6 the khong c6 so nhon long town ciu (globalidentification)
(ID) vl chting c6 mOt so luqng len mio dau va mOt so lugng len cac nut cam
'nen.
Do v$y, ciu tnic !twig moi se:
õ Ket hop yin de nimg lugng vi !chit Wing (firth tuyen.
õ Tich hop da lieu va giao thirc
õ Truyen nang lugng hieu qua qua cac phtrong lien khong day.
õ Chia se nhiem vo gran cac nut lan c$n.
õ Cac nut cam lien duqc phen b6 trong mOt sensor field nhu hinh (1.1). MOi mOt
nut cam hien ce khit fling thu dial) der lieu vi dinh tuyen lei den cac sink.