I Prees ►i s FCS 4 04 Yeats j COL Munn *0 E la ann e n
a. Tank hinh Irian khai HIM= tel Lao Cat
Trong giai doon tfr thing 7 den 12/2006, tap doan Intel, VDC vi Ca quan hop the phat trien qutic to Hoa Kt tai Via Nam (USAID) phoi hop thin nghiem cong nghe bang rung kh8ng day c6 djnh Fixed WiMax 802.16-2004 Rev. D6i vai ten s6 3.3 GHz - 3.4 GHz tth 19 diem 6 Lilo Cai g6m ctic trueng hoc, co s6 y te, diem butt dien van holt, uy ban xe, doanh nghiep vita vi nhe vi mOt gia dinh ding dan chtra tang tiep Vic v6i ding nghe hien 4i. Djch vu ductc dua vao lit* nghiem la tho3i vi Internet the dO cao, c6 414 chi phi 500. 000 USD - 600. 000 USD. Butte diu thi qui trinh trien khai thf diem WiMax tai Lao Cai dit dot ducc nhftng thinh Ong ban diu nhu:
Tai tru?mg THCS Van H6a thl hoc sinh 6 day di c6 ca hOi tikp can WA Internet the dO cao ngoii ra they c8 vi cic em hoc sinh 6 day con duce dung en thoth Internet v6i chat luting khi tot.
Toi tnmg tam y th xl Bic Cutmg clic y tai 6 trung tam da dupe tiip can WA Internet the dO cao vi thoth IP tit ci deu hoot dung tat vi phat huy duce hieu qui.
Thing 5/2007, VNPT tap tuc cung cap thtl nghiem tth 11 diem cfut Ta Van chi.%
UNG DUNG LONG NGlie WiMAX
Ilinh 4.2 Toan canh thung Ifing Tit Van
Sau khi c6 cic th8ng tin ve ket qui du in thir nghiem WiMAX tai Lio Cai sau 6 thing Gila mOt so phucmg tien th8ng tin 41 chting, 41 dien cho nhi sin xuAt thiet bj WiMAX - Alvarion (Israel) vi dai dien Cang ty Dien toin vi Truyen s6 lieu (VDC) d8 c6 bad lim viec vi truc tiep len Lio Cal kiem tra, xem )(it lai toin b0 he thing WiMAX da tit* nghiem thbi gian qua.
Qua kiem tra toin bO he thong, 8ng Nguyen Minh Dire - dai dien cho Alvarion dit dua ra mOt so nh$n djnh ring tai Tnrting PTCS Van Hai li diem xa nit& eta he thong, to et: ly li 4,7 km (do tren bin de) he thong WiMAX von hoot dung rat tot tong sued qui trinh tit* nghiem. Deng thbi 1 diem lip dat khtc tai xa Van Hoi, cich 4 km Gang lutm hoot gang tot li "diem buu dien Van hoar xa.
Ngoii ra cic diem khic tai phubng Bic Cubing yeti 4 diem thin nghiem WiMAX li throng PTCS Bic Cubing, nhi 8ng Vuang Trung Thin, tong ty diu to xay dung Cling trinh vi Tram y to xa Bic Cubng hien tth hog dung tot. Tuy nhien, truck d6 c6 y kien cho ring tai hO 8ng Vuang Trung Thin, tin hieu WiMAX khOng tot. Nguyen thin li do lei phin nhting chit hoin tan khOng lien quan den phial cling thiet bj. VAn de niy da duqc VDC /al ly xong.
Tai Tram y to Bic Cubing, sting Dirc kiem tra thi thiy CPE khOng thu duce tin hieu. Nguyen nhin li do tai thbi diem lip dat, CPE hutmg ve iingten tram g6c. Tuy nhien, sau 46 khoing 3 thing, c8ng an ILA Bic Cubing xily dung try sb lam viec. Mth ngei ctia toi nhi chin ngang dubng thu song elk CPE vi xung quanh de khOng c6 cic toi nhi/vat chin khic de too song phin xa nen CPE khOng thu ducat tin hieu nhin thing deng thbi ding khOng thu dupe sting phin xo. Cic ben da xfr nang cao CPE them 2 met vi dung thiet bj SAU de do mirc tin hieu elm CPE 4t 7/9 stitch sting vi toin b0 thiet bj da hoot dung tot.
Phan Tien Tang
ONG DUNG CONG NGHE WiMAX
Tram y to xa Von Hoa la mOt trong nhttng diem du kien thir nghiem, tuy nhien can bO Icy thuat ctia VDC va dpi dien cos nhtl sim xuit thiet bj WiMAX dit kiem tra va they khong thu$n lqi nen da chuyen sang thu nghiem Sa NOi Vu thanh ph6. Nguyen nhan la do tai diem Van Hol chug ce dieu Icier) de xay cOt angten lip CPE, chi c6 ng8i nha thip khoang each xa (lion 7km) bj che chin nhieu bei d6i
Tai diem khac nhu Diem Van hoa xa Von Hol, dieu kien dun nhin N che chin tuy nhien tin hieu thu phat van rat tot nhat ding nghe ghep kenh phan chia theo tin so tut giao-OFDM va c6 m8i tnrimg cho sting phAn xo.
Doi v6i chit luqng thoai VoIP tren nen Cong nghe WiMAX, theo khio sat cita Butt dien Tinh Lilo Cai ming nhu VDC hay Vien khoa hoc Icy thuat butt dien du chit
luqng djch vu VoIP tren nen cong nghe WiMAX IA tat, am thanh rei rang, khong tieng vong, hien ttrqng ver tieng.