I Prees ►i s FCS 4 04 Yeats j COL Munn *0 E la ann e n
Hinh 4.6 WiMAX tren ta
4.5. Tam thing cho wimax 6 Vitt Nam
WiMAX co djnh cing nhu WiMAX di dOng mang tinh dong hank vit cling phat trien. Dieu nay Ichang mang tinh mau than do nhu ciu khich hang kh8ng phii li chi theo mOt nhu ciu nhat djnh ma c6 nhang bO phen yeu ciu tinh di dung cao con c6 thing ngteri lai yeu ciu mOt chit luqng tot han nhieu ma khong phai la firth di dung that cao. D6i vai cic thiet 131 di dung tit nhien duqc stl dung yeti he thong ceu hinh vat the cling nh6 gqn cling tien lqi se am gitim kha niing tuang tic voi tram g6c, con vai thiet bj co djnh tai nha thi do !thong yeu au vl kha niing di chuyin nen thiet bj c6 the co duce kich Or to han nen hieu suit may thu se tot hon.
Vii s6 luqng Ichich hang d8ng dio va nhu au bang rung rit 16n, Viet Nam la thi twang tiem niing cis cic nha Ichai thic dich vu villn thong dun tree co se ding nghe WiMAX vai thing uu diem not bat va tien ich dui no.
4.6. Kit lutn chiming
Mang WIMAX cho phip phti sang trong pham vi rung, t6c dO truyin tin 16n, cho phip nhieu thus bao ming truy nhap vii cic dich vp nhu VoIP, video... Vol chit luqng cao ma ngay ca ADSL cling chua dip ling tot duqc. VI v$y WIMAX cho phip nheng ving ma truck day ADSL chug wan tai duqc thi nay cling c6 the truy Op Internet. WIMAX cho phip cic ding ty vai nhieu chi nhinh trong thinh ph6 Ichong cin lip d#t mang LAN ma chi cin at mOt tram BTS phi sang trong ca khu virc hok ding Ic}7 thug bao hang thing vai ding ty cung cap dich vv.
De c6 the truy cep tai mang thi cic thus bao duqc cung cap mOt ma s6 rieng va duqc giai han quyin truy nh#p theo doing hay theo lch6i luqng th8ng tin nhin tir mang. Nhin chung c8ng nghe mai nay se tic dung din mOt s6 met ca ban sau:
UNG D1JNG CONG NGI-le WiMAX
WIMAX se giftp clic nhi khai thic di Ong Mang con phv thu0c vao dubng truyIn phai di thue cilia nhi cung clip mang hilt tuyen. VI ngby nay hitu het cac dubng truer' gitta BSC vi MSC hay giita clic MSC voi nhau deu 11 cap quang, hoac vi ba diem - diem. Vi v$y khi ducrc thay the thi cac djch vv di Ong se tang len ve dung lugng de c6 the trien khai them ctic djch vv mai ten vung bao phti rung.
Ve mat xa hOi thi v6i phain vi phu song rung 16n va chat luong cao, toe dO lon WIMAX cung gitip mOt phAn dAc lIrc cho cac km luqng an ninh, ciru hol hay cic ta chirc ciru he c6 the duy trl lien lac trong nhieu dieu kien thai tint, dja hInh Ichic nhau phvc Ai cho nhiem vit Gila mirth.
Phan Tien Tang
KET LUAN VA HUONG PHAT TRIEN DE TAI
!CET LUAN VA HUIONG PRAT TRIEN DE TAI Kit lu$n Kit lu$n
Vei muc tieu 16 tim hieu ding nghe truy nh$p ve tuyen WiMAX. Qua nghien cthi, phan Lich, so mirth vi dinh gii thvc hien trong nOi dung chuyen dZ c6 the rut ra ket lu$n nhu sau:
— WiMAX li c8ng nghe truy nh$p va tuyen bang rung duqc phit trim dva tren ho tieu chart IEEE 802.16 vol hai lieu chulin chit yeu duqc ip clung da duce thong qua 11 IEEE 802.16-2004 li co se, cho phien bin WiMAX c6 djnh vi lieu chain IEEE 802.16 e l6 co se cho phien bin WiMAX di dung. — Dien din WiMAX lit mOt te chirc gam cic tang ty cung cep thiet bj, nhi
cung cap djch vu, nOi dung... de cling lira chon ra cic tieu chutin trong cic tieu chart IEEE 802.16-2004 vi IEEE802.16e de dim ra cic profile cho WiMAX. Cic profile ye WiMAX di duce dies din WiMAX thong qua vi lit cc se cho viec sin 'truth thiet bj, dieu Wily cho phep cic nhi sin suit c6 khi ning hop tic de cling phit thin thiet bj, gam cic chi phi cho nghien con phit then, glint gii thinh sin phim.
— COng nghe OFDM vei ninitng tinh nAng nOi trOi nhu khi /tang chOng khi nAng se. dung phi cao, cho phep truyen tin vei tee dO cao... duqc sir dung trong WiMAX c6 djnh da cho phep he thong c6 khi thing lim viec tot trong mai truang NLOS vi Mc dO truyen tin cao.
— Phien bin WiMAX di dOng dva tren lieu chart IEE802.16e 11 sir be sung cic yeu ciu cho tieu chart TER 802.16-2004 dA be, sung nhitng tinh Wing mem deo vi hieu qui hon. Viec sfr dung OFDMA trong phien bin WiMAX di dOng cho phep stl dung linh boat vi hieu qui hcrn bang thong, cOng nhu tang cubng cic khi niing cho an ten, ... Ngorli ra yeti phien bin My con ho trq them nhieu tinh niing khic nhu chit luqng djch At, bio met vv...
— So yeti cic clang nghe truy nh$p v8 tuyen bAng rung c6 cung pham vi img dtmg, WiMAX li cOng nghe ding nhon ducrc sv quan tam dtic biet cfia ci cic nhi sin xuat cOng nhu ngtrtri cung clip djch vtii vi nguoi sir dung nhe cic d#c tint' nOi trOi cola no, d#c biet khi nhu ciu truy nh$p dit lieu ngtly ring manh. V6i viec WiMAX duqc tai uu cho djch vµ de lieu, WiMAX e6 the song song tan tci cling vei cic mang nhu 3G duqc t6i uu cho thoai. Thy Phan Tien Tong
KET LUA/s1 VA HUONG PHAT TRIEN DU
thuOc mvc dich cM nha cung cep, yeu ciu ldiach hang, cac mung se cO sv phat
trier tuang img.
Voi !chit rang cung clip cac djch vµ truy nhip bang rOng cho ca c6 djnh vit di ding, WiMAX la lira chip mang firth quyet dinh cho cac nha cung cap djch vµ nhilm chiem lint' thi throng cling nhu tang khri nling cimh tranh ctia mirth. Hieu r8 cac clic diem k9 thuit, van dung vao cac dieu kien thvc to di thin khai he thong mOt cach nhanh cheng va hieu quit se dem 13i nhitng kM clang het sirc lan cho cac nhit cung cap djch vp vi ca ngtrai sum dung.
Viec thin khai WiMAX tai Viet Nam se dap img duce cac den hei nay mOt
lon ye nhu cith truy nh$p bang rOng, gbp philn thiic day kinh to phat villa, dac biet 111
cac khu vvc nong them, mien nui vi cac khu d8 thi mei. Hiroug phit train di Si
Trong pharn vi di tai nay, em di tam hieu cling nghe ciut mang truyen din khong day WiMAX. Tren day em chi dm Mau hai chitin thong dung ciut WiMAX la 802.16- 2004 vi 802.16e. Hien nay, ngteri to dang nghien ctiu nhieu han de hotin thin. Bong thbi day la mOt he thong truyen din lchong day nen can nghien ciru ki han vi bito mit cM he thong. Do do, di tai nay con co the phat trier theo nhitu huCmg !chic nhau di cho de till nay gin veri thvc to han. HuOng phit trier de tai nhu sau:
— MO rOng tam hieu cac chutin kink nhieu mac han; Ching han nhu 802.16- 2009, 802.161,....
— Di sau tam hieu bien phitp bito m$t cM he thong.
MOt litn nits em xin Chan thanh dun an cite that' c8 giao, bun be, gia dinh da
!Nit tinh gii►p der em hart thanh tot ban chuyen di tot nghiep cr5a mlnh. Die biet em xin chan thanh cam an thiy HoAng Trong Minh la thiy giito frac tiep huang tao dieu ;den vi chi bio cho em trong su6t thbi gian em hob thanh chuyen de.
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TAI LItU TRAM KHAO
[1]. IEEE 802.16 - 2004, (October, 2004), Air Interface for Fixed Broadband Wireless Access Systems.
[2]. IEEE 802.16e, (February, 2005), Air Interface for Fixed and Mobile Broadband Wireless Access Systems.
[3]. Hassan Yagoobi, Intel Technology Journal, (Vol 08, August 2004) Scalable
OFDMA Physical Layer in IEEE 802.16 WirelessMAN4.
[4]. WiMAX Forum, (2006), Mobile WiMAX - Part I: A Technical Overview and Performance Evaluation.
[5]. WiMAX Forum, (March, 2006) Mobile WiMAX - Part II: A Comparative Analysis.
[6]. 3GPP TS 25.308, (Sep. 2004), High Speed Downlink Packet Access (HSDPA) Overall Description.
[7]. 3rd Generation Partnership Project 2 "3GPP2", (March 2004) CDMA2000
High Rate Packet Data Air Interface Specification .
[8]. John Wiley & Sons, Ltd, (2006), The Business of WiMAX
[9]. WiMAX Forum white paper, WiMAX's technology for LOS and NLOS environments.
[10]. WiMAX Forum white paper, The business case for Fixed Wireless Access in Emerging countries.
[11]. WiMAX Forum, (November 2005), Fixed, nomadic, portable and mobile applications for 802.16-2004 and 802.16e WiMAX networks.
[12]. WiMAX Forum white paper, IEEE 802.16 Standard and WiMAX igniting Broadband Wireless Access.
[13].InTech-Quality_of service_differentiation_in wimax networks. [14].www.ieee.org [15].www.quantrimang.com [16].www.svbkol.org [17].www.vnpt.com.vn [18] . www.wimaxforum.org [19].www.wimaxpro.org [20].www.wimax.com [21] . www.3c.com.vn