Qua trinh ICham phi tuyen duqc Icheri tao bit cir khi nao mOt nut ngulin mu6n giao tiep v6i cac nut mang khac nhung no l3i kW:mg co th8ng tin djnh tuyEn trong Bang djnh tuy6n cua no. Mai nut duy tri hai b0 dem: s6 thir tq nut va broadcast ID.
Nut ngu6n kheri tao Kham phi tuyen bing cach quiing ba gal tin RREQ toi hang x6m dm no.
RREQ chira cac truang sau:
<source_addr source sequence* broadcast_id dest_addr dest sequence * hop_cnt>
Trong do:
source_addr: dia chi ngu6n
source sequence: s6 thir ur ngu6n
broadcast_id: dinh danh cua RREQ
dest_addr: dia chi dich
dest sequence: s6 thir tu dich
hop_cnt : 56 chang
C#p <source_addr, broadcast_id> duce xic dinh duy nhit Arai m6i ban tin RREQ. broadcast_id duqc ting len khi nut ngu6n kheri tao mot RREQ meri. Mai nut hang )(am khi nhan duqc ban tin RREQ se giri lai mOt bim tin RREP tai nut ngu6n neu no biet mOt tuyen tai dich, hoc tiep tuc quang ba ban tin RREQ toi not hang x6m sau khi tin hop_cnt. Chu y ring miSi nut co the nhon duqc nhieu ban sao cua cimg mOt RREQ tir cac hang x6m. Khi mOt nut trung gian nhon duqc mot RREQ, neu no di
DINH TUYEN TRONG MANG MANET
nhin RREQ voi cang broadcast_id vi dia chi dich, nO se loii b6 RREQ do vi kheng chuyen tier) gei tin de naa. Neu met nut khong the dip img duqc RREQ, no se theo dOi cic thong tin sau de thiet lip tuyen dubng nguqc cling filer thiet lip tuyen dubng thuin de (kith cho vier truyen gel tin RREP.
• Dia chi IP dich • Dia chi IP nguin • Broadcast ID
• Thai gian het han ciut entry tuyen dubng nguqc • S6 the tit cua net nguin