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4.3.2.Thdch thee
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4.3.2.Thdch thee
Nhfing trd• nggi chfnh tti triin khai Winutx tfr Vitt Nam:
Thu nhAt li ve bang tin. Ching to se phii dqi nhitng "Ong 16n" ten the giOi then khai truck rbi mei vio Viet Nam. The hai, mac de Meg nghe hfra hgn v#y nhtmg rat c6 the cat cang ty vien thong lien lac hin se nglin ngai tong viec trier khai Wimax vi lo ngai se gay that thu cho cic djch vµ SMS vi voice. Vu cutoi cling, thich they lan nhit cua Wimax la viec clA bj cic dei the di three chiem het thi phin.
Xet ve mat Ichic, ding nghe WiMAX rat uu vitt nhtmg vin c6 !thong it nhling Ich6 ;chin kW. D61i gii ci thiet bj diu cuei hien can dit; c6 s6 lugng han che cic nhi sin xusit cic thiet bj cu6i; viec chan hoi thiet bj kh6 clang nhit do khi ning mem deo; linh host (flexibility) Ma WiMAX. Ben canh de, do WiMAX dva ten nen IP nen viec ket n6i, dinh se, chit luring (Lich vu, bio mot vi an thin mpg can nghien cuu cu the.
WiMAX li mOt giii phip tuyet voi ve mat c8ng nghe ket not nhung se can mOt chi phi km phii be ra de phit trien ha tang cho mOt he thong mei tong khi he thong cil yin can chua duqc se dung het. Qui thvc, neu phii diu to met khoin kinh phi de then khai WiMAX ten mOt quy m8 len tong khi c8ng nghe 3G van li tiern fling chua khai thic het thi chic chin Mc cong ty vier thong se phii tinh tan vi can nhic het sue ky luang twee khi be den dau to cho viec phit trier djch vv niy.
Thvc to trien khai WiMAX tai Lio Cai ben earth nhling tin hieu Lich cvc thi qui WW1 thu nghiem cling da St hien nhOng diu hieu kheing may !chi quan. De 14 vong 16n vio Wimax, song kiem tra trrc tiep tai 3 diem thu song thi ket qui lai chug nhu mong muen.
— Diem thu song tai tram Viba Cam Dueng„ rich tram phit 9,5 Ian, miy thu chi hien 3/9 vach song, do diem thu b vi ti tuang del cao, Ichang bj che chin. — Diem thu ngay tong thj xl Lio Cai, cich tram phit song trung tam 3 Ian, bj
cay xanh che chin, at miy thu tren mii nha thu duqc 4 vach song. Twang hop at may thu du& oat thi chi thu duqc 2 vach sting.
— Tai nhi nghi cea Btru dien tinh Lio Cai, cich tram phit trung tam 3,2 km, neu oat dung twang c6 the thu duqc den 5 vach sting. Tuy nhien, Mc chuyen gia Vien !MKT btru dien trim tiep di do, dainh gii he thong, nhiln thiy: tong dieu kien thbi tat binh thutmg, sting phit to tram phin n vio cic vat can twee khi den diu thu, Ang ten djnh hueng mei thu duqc. Te de c6 the ket lu$n, song Wimax khOng On djnh , phu thuOc nhieu vio hien dung Ma v$t dm, then tiet...
ONG DUNG CONG NGHe WiMAX
Trong 19 diem thu sing Wimax ngiy diu tien thi mot diem kh8ng thu duct sting nhu tit totin vi dA phii chuyin sang dirt diem khic. Theo cic chuyen gia vier th8ng, an cAn nhic, luu y dic biet viec thu sting phi!' xtt Wimax trait khi trien khai rung, nhit li tai cic thinh ph616n vit cAn lien tut they d6i.
Khi mot c8ng nghe mai ra &it lutin o5 nhftng y kien khic nhau ve c8ng nghe d6 vi WiMax cling khang phii lA mat ngoai le. Vii nhftng tinh riling uu viet vA khi fling img dung to lam WiMax dA mau ching gitinh dtrqc su quan tim dic biet cia cic nhi sin xuAt thiet bj, cic t6 chic, cic doanh nghiep vA ci ci nhAn. Song cling khOng It nguai can to ra hoii nghi ve c8ng nghe nAy vi cling nhu khi riling cia ne se lint thay d6i djch At kit n61 mang Internet trong ttrcmg lai vi nhftng 19 do cia str hoii nghi. Trutc het ve mit kY thu$t WiMax can co mat s6 nhuqc diem sau:
— Ve mAt dii ten me WiMax su dung kheing tuong thich tai mqi quitc gia dieu nAy se hurt the khi nAng phi bien cia WiMax tai thing (Ric gia
— Vin de bio mit cia WiMax duqc dinh gii lA can rat nhieu 16 hing do di dei hii cic !IA cung cap dich vµ phii mau chang giii quyet van de ay. — Ve chuan cis WiMax cling rat ding nii tad bil vl WiMax li mat chuin
c8ng nghe nhtmg lai chua duct chuin hot "hien tai thi WiMax dang sfr dyng taxi 10 c8ng nghe khic nhau vA ca tai 3 dung nen ca se chua the lien th8ng ttrcmg thich".
— Ve thi twang thl WiMax can phii chiu sty ctmh tranh mtuth me vii cic c8ng nghe khic nhu : Wi-Fi mot ding nghe dA tra nen phi bier dai vii cic rank phit trien, kat nal Internet c6 dAy din nhu DSL, cia mung dien thoui di dOng vein dang phit tan mot cich het sirc nAng dung vi cic c8ng nghe thay the khic nhu mang d8 thj cult cic nuOc chiu Au hay c8ng nghe HSDPA (High Speed Downlink Packet Access) dinh cho diet' thoai di dOng.
Mil ciu hen ve gii cia nhftng diet bi phut vu cho vier trien khai, lip dit Wimax
can dang be ng6, thi nhieu nguai dA bin khoAn ve yin de "tin so chuin cho Wimax". Bei le, nhftng dii tin chart Wimax Icheing the cap cho qui nhieu nguai.
Ithong ai c6 the phi Whin du in then khai Wimax tai Lio Cai li mat du an mang firth xi hOi cao, hia hqn lint thay dai cues sang cho nhftng nguai din mien nii, yang cao Viet Nam, ttto dieu kien cho hq Quay flap xfic veri c8ng nghe mai. Tuy nhien, tan khai the nio cho hieu qua, cho phi hqp yeti nhu tau vi khi ning kinh to cia dja phuong mai IA vein de ding nii.
Phan Tien Ting
ONG DUNG CONG NGH$ WiMAX 4.3.3. 7Ink hinh thitc tai
Thuc Wong WiMAX 6 Viet Nam hien nay 11 rat c6 then vong. Sau tit* nghiem Lao Cai tuy chtra duce darth gia cao lim tuy nhien hien nay cac nhit khai thac dich dang tfch cue trien khai vi thU nghiem c8ng nghe mei nay, vd: ngtly 16/10/2007, Motorola da t8 clam bu6i heti thito chuyen de ve WiMAX yeti nhieu thong tin vi tinh hinh WiMAX tren the gibe vi mOt s6 khuyen nghj cho Viet Nam.
VNPT la tap doin di diu trong via trien khai thin nghiem deg nghe WiMAX. Chimg to se di theo 10 trinh thin nghiem WiMAX cult VNPT.