C. nip kw trin cdc Ichn vise plan cip
Y twang de trao dai th8ng tin gitta cic xe di lam tang cic de xuat cho cic (mg dung Trong phim nay, se lam nai b#t mOt sa 16p img dung thu6ng xuyea de cep kh
CHUONG 3 NHONG LING DWG CUA VANET 3.5 XAC SUAT, T4P HcfP THEO VUNG
3.5. XAC SUAT, T4P HcfP THEO VUNG
MOt vein de quan tong ala tip hqp de lieu trong VANET la sv danh gia ye chit luqng hoc cep nhit thong tin tong hqp: Trai nguqc voi quan sat duy nhit, gia trj tang hqp khong the duqc so mirth Ulm tiep dtra tree Whin thoi gian. Cac ban tem tit vi dv, tong s6 dja diem d6 xe trong met se phis c6a thanh ph6 duqc too ra bdri xe thuOng sir
kheng phai c6 phien bin cip nhot c6a tit ca cac de lieu co so c6 sin. VI viy, tip hqp nhieu lin cho cung mOt khu vtrc c6 the ten tai, dtra tren cac diem Ichac nhau, nhung c6 kha Wing chin cheo kien thirc. Quyet djnh gift lai cai nao dtra tren dfk lieu co ban la kh6 khan, nett khOng phiti la khemg the. VI viy, lam the nao khi xe duqc cung cip hai phien ban clia cung mOt tong hqp va nen quyet djnh cai nao cin gift (va ph6 bit% n6)?
De tra 16i cho cau bed nay, phai mo rung Sr tuOng du lien duqc neu trong chuong phi Bien thong tin va thito Juin chi flit hon ve mOt ke hooch, ban du duqc de xuit trong Lochert. Cach tie') can nay cho thiy vin de c6 the duqc lchic phvc neu ca hai quan sit va tjip hqp don 16 kh8ng mang gia trj quan sit trqc tiep, nhung thay vi ce ch(ra mOt gia trj xip xi trong hinh thirc cOa mOt phac thao cai goi la tang thai thai mem. Trong khi phac thao tang thai mem vin 'thong cung cip mOt cach de so mirth chit luqng c6a hai tap hqp trtrc tiep, cho ph6p mOt cai gi d6 tit hon: nhieu tip hqp cho cung mOt khu Arc c6 the duqc sap nhip, mang loi mOt str kit hqp mai mi ch(ra thong tin cua bit hqp nao. Do d6, khong cin phai quyet djnh tang hqp c6 chfra thong tin cip nhit.