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I HC NNGTRNG I HC BCH KHOA

KHOA IN T-

VIN THNG

N TT NGHIP ti :

CNG NGH WIMAX V KH NNG TRINKHAI TRONG THC T

Ngithc hin :NGUYN MNH TINLp : O3DT3Ngi hng dn : Thc SH VIT VIT

Nng, 2008


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NI DUNG TNG QUAN V CNG NGH WIMAX.

KIN TRC MNG TRUY CP WIMAX.

SO SNH WIMAX VI MT S CNG NGH TRUY NHP V

TUYN BNG RNG KHC V GII PHP CA CC NH SN

XUT.

NGHIN CU KH NNG TRIN KHAI V NG DNG H

THNG WIMAX TRN MNG VIN THNG VIT NAM.

M PHNG MT MNG WIMAX N GIN DNG CHNG

TRNH OMNET++.


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TNG QUAN V CNG NGH WIMAX

Khi nim

WiMax l mt mng khng dy bng thng rng vit ttl Worldwide Interoperability for Microwave Access.WiMax ng dng trong thit b mng Internet dnh slng ngi s dng ln thm vo gi thnh r. WiMaxc thit k da vo tiu chun IEEE 802.16.

WiMax l mt chun khng dy ang pht trin rtnhanh, ha hn to ra kh nng kt ni bng thng rng tc cao cho c mng c nh ln mng khng dy di ng,phm vi ph sng c m rng .


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Cc chun ca Wimax c im Chun IEEE 802.16 2001

Chun IEEE 802.16a

Chun IEEE 802.16 2004

Chun IEEE 802.16e

Cu trc mm do

Cht lng dch v QoS Trin khai nhanh Dch v a mc Tnh tng thch

Di ng Li nhun Hot ng NLOS Ph sng rng hn Dung lng cao Tnh m rng Bo mt


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M hnh h thng v cc ng dng ca WiMAX


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Tnh hnh trin khai WiMAXTrn th gii

Cc mng th nghim cng ngh WiMaxc nhbng n khp mi ni (50 nctrn th gii).

Mng ph sng di ng c cng nghtng t WiMAX l WiBro ca HnQuc.

n nay, c mt s nc i votrin khai v khai thc hoc th nghimcc dch v trn nn Mobile WiMax nhM, Australia, Brazil, Chile, ...

T ngy 15-19/10/2007C quan vinthng quc t thuc Lin hip quc ITU

ph duyt cng ngh bng rng khngdy ny vo b chun IMT-2000

Ti Vit Nam

VNPT trin khai th nghim cng nghWiMAX ti Lo Cai vo thng 10/2006 v nghim thu thnh cng vo thng4/2007.

Nm 2006, ti Vit Nam c 4 doanhnghip c b Bu chnh Vin thng traogiy php cung cp th nghim dch vWiMAX c nh: Viettel, VTC, VNPT vFPT Telecom

Ngy 1/10/2007, Chnh ph cp phptrin khai dch v thng tin di ng 3G vdch v truy nhp bng rng khng dyWiMAX

Ph Th tng ng cp php thnghim dch v WiMAX di ng cho 4doanh nghip EVN Telecom, Viettel, FPTv VTC th nghim ti bng tn s 2,3 2,4 GHz; VNPT th nghim ti bng tns 2,5 2,69 GHz.


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KIN TRC MNG TRUY CP WIMAX M hnh tham chiu


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SO SNH WIMAX VI MT S CNG NGHTRUY NHP V TUYN BNG RNG KHC

V GII PHP CA CC NH SN XUT

Trong phn ny s phn tch nh gi cc ch tiu giaWiMAX v cc h thng v tuyn c nh cng phm vi

ng dng nh LMDS, MMDS, cc h thng di ng nh3G, WiBro. Kt qu a ra l s nh gi kh nng trinkhai ca WiMAX so vi cc loi khc. Ngoi ra cn cungcp cc gii php ca cc nh sn xut h tr cho vic

trin khai WiMAX.


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So snh WiMAX c nh v LMDS, MMDSCc cng ngh v tuyn c nh c kh nng cnh tranh vi WiMAX c nh hin

ang c xem xt bao gm: H thng phn b a im ni vng v H thng phn b a

im a knh.


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So snh WiMAX di ng vi 3GHai dng khc nhau ca CDMA 3G c s dng rng ri l WCDMA - gii php

FDD da trn c s knh 5 MHz v CDMA2000 - gii php da trn c s knh 1,25 MHz .


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So snh WiMAX di ng vi WiBroWiBro l mt mng truy nhp bng rng da trn tiu chun IEEE 802.16e, tuy

nhin tnh nng p dng ca tiu chun ny khc vi cc tnh nng m din n WiMAXa ra cho WiMAX di ng nn mng ny khng thc s l WiMAX di ng.

Vic mng WiBro th nghim thnh cng v a vo khai thc thng mi cho thy kh nng trin khai thnh cng ca WiMAX l ht sc to ln


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Gii php ca IntelGii php Chipset Intel: i mi nn bng rng v tuyn c nh Wimax Chipset Intel PRO/Wireless 5116 tch hp cao tun theo chun IEEE 802.16-2004

hat ng c 2 bng tn s v tuyn cp php v khng cp php.

Bng thng knh v tc d liu c th lp trnh h tr cc ng dng thngthng hay cc ng dng m rng

Tiu chun do Intel l thnh vin son tho

Hng ch to chip hng u cho my tnh v in thoi di ng , thnh vin ch cht

ca Wimax forum, xy dng han thin tiu chun 802.16 c c nh v di ng.

Gii php sn phm ca SR-TelecomLoi sn phm: Trm gc Wimax, nhn hiu thng mi ABS4000 Gii php FWA Wimax i xng ca SR-Telecom kt ni ng thi ti nhiu nh

cung cp dch v v h tr cc ng dng yu cu QoS khc nhau.

ABS4000 khng ch tun theo cc c im c bn ca Wimax m cn c thm ccc im ty chn nh: MIMO, m ha khng gian v knh ph (Sub-channelling)


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Gii php sn phm ca Alvarion L i tc bn hng ca Intel, Cc chip ca Intel c a vo cc dng sn phm

BreezeMax t thng 4-2005.

BreezeMax l sn phm c trm gc ln thit b u cui.

Gii php sn phm ca Motorola cho ISP T nm 2002 hng pht trin dng sn phm Canopy cng ngh Wimax v c trin

khai lp t trn mt s quc gia trn th gii. Lot sn phm ny bao gm c cc CPE ngoi tri cng nh cc sn phm trong nh

modem CPE v Wifi gateway. Cc trm gc wimax (WBS) ca Motorola c khangcch rt mm do v linh hot ph hp cho trin khai cc t bo.

Gii php Chipset ca Fujitsu Fujitsu pht trin cc ng dng truy cp v tuyn bng rng rt hiu qu v chi ph. Fujitsu Wimax SoC tun theo b tiu chun IEEE 802.16-2004 v c th cu hnh s

dng c c hai ng dng trm thu bao v trm gc.

H thng Fujitsu 802.16bao gm y cc yu cu phn mm v phn cng cho giiphp h thng chi ph thp.


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NGHIN CU KH NNG TRIN KHAI VNG DNG H THNG WIMAX TRN

MNG VIN THNG VIT NAM Nhu cu truy nhp bng rng ti Vit Nam

Hin nay, vi s pht trin bng n v nhu cu truyn s liu tc cao v nhu

cu a dng ho cc loi hnh dch v cung cp, nhu cu truy nhp bng rng ti

Vit Nam ang i hi l ht sc ln. c bit vi n pht trin Chnh ph in t hay tin hc ha hnh chnh nh

nc th nhu cu truy nhp bng rng ca cc c quan ng, chnh quyn, c

bit l vi cc c quan ng, chnh quyn cp x phng c nh gi l rt

ln v rng khp.


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Cc m hnh trin khai cng ngh mng WiMAXMng dng ring

Cellular backhaul Ph sng m rng cho

kiu cu trc t bo

Thit b WiMAX xy

dng nn h tng mnh

ti trm gc t m

rng ra cc cellular xa


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Mng ngn hng

Thng thng cc ngnhng thng nm phn

b trong cc khu vcrng.

Cc ngn hng trung

tm c th kt ni ncc chi nhnh ca mnhthng qua mngWiMAX c nhn chuyn ti thoi, data v

video


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Mng gio dc

Cc ban ph trchtrng hc dngmng WiMAX ktni cc trng v ccvn phng ban trongcng mt khu vcqun, huyn

Vng ph sng rng,chi ph hp l, c

bit hiu qu i vi

cc trng nngthn


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An ton cho cc truy nhp cng cng (Public Safety) Bo v, cung cp

thng tin cho cc

c quan chnh phnh: cng an,cha chy, cu h


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Thng tin lin lc xa b: WiMAX c th

ng dngtrong cc

cng ty dukh trong

thng tin lin

lc gia t

lin v ginkhoan


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Cc cng trnh xy dng (mang tnh tm thi)

Cc cng ty xydng c th dngmng WiMAX thit lpng lin lcn cng trng

ni ang xydng


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Cc mng phc v cng ng Mng truy nhp WSP

M rng phm vi cungcp dch v i vi ccWSPs.

Cc WSPs dng mngWiMAX cung cp ktni cho c khch hng lngi dng ring l haycng ty


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Trin khai vng nng thn xa xi ho lnh- y l mt trongnhng mc tiu trng

im pht trin x hica quc gia trongvic phc v nhngnhu cu thit yu nhthoi v internet.

- Gii php WiMAX cp n v kh nng

ph sng rng, titkim


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Tnh hnh trin khai WiMAX th nghim ti Vit Nam Ti Giy php s 274/GP-BBCVT ngy 17 thng 3 nm 2006 ca B Bu Chnh Vin

Thng cp php cho VNPT, cho php s dng tn s v tuyn in trong bng tn 3,3GHz - 3,4 GHz thit lp mng li ca mnh.

T B Bu chnh Vin thng a ra cu hnh cho php th nghim mng WiMAX

INTERNET

TRUNG TMQUN L

RADIUS AAAServer Billing

System

BS BS

ng trc cho

Wifi HotspotInternet Access Internet Access

ng trc cho

Wifi Hotspot


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Tnh hnh trin khai WiMAX th nghim ti Vit Nam VNPT giao cho VDC tin hnh lp phng n th nghim cng ngh v m hnh ng dng WiMAX .

Quy m th nghim bao gm: trm gc WiMAXc kh nng kt ni trong bn knh 5 Km, thit b u cuiCPE ngoi tri.Thit b c chn th nghim l ca hng Alvarion.

S kt ni ti trm gc S kt ni trm u cui thu bao

Anten nh hngOmni

SngWiMAX

Sng

WiMA

X

SngWiMAX

WIMAX AP

Tuyn kt ni

Trm vin thng

My tnh c nhn

(PC)

My tnh c nhn

(PC)

`

My tnh c nhn

(PC)

My tnh c nhn

(PC)

Switch

WiMAX CPE

Loi ngoi tri

Anten ngoi tri


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M PHNG MT MNG WIMAX N GINDNG CHNG TRNH OMNET++

Gii thiu v chng trnh m phng OMNet++OMNet++ l cm t vit tt ca Objective Modular Network Tested in C++. Chc

nng chnh ca n l:- M phng lu lng ca mt mng vin thng.- M phng cc giao thc.

- M phng mng a x l v phn b ri rc cc h phn cng

- Kim tra tnh hp l ca cu trc phn cng.- V nhng h thng s kin ri rc khc...

OMNet++ nhng u im chnh sau:- n gin trong vic s dng v lp trnh v chy trn Windows v s dng ngnng C++.

- C th va dng m phng mng vin thng (mng bo hiu) v mng my tnh

(IP).- Giao din m phng ha p v c nhiu la chn cho tc x l s kintrong mng


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Chng trnh m phng mt mng WiMAX n gin Cc giao din ca chng trnh

Giao din hot ng ca mng Giao din ngi iu khin


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Kt qu m phng c Cc gi tr thng k

Scalars l chng trnh do OMNet++ h tr, n dng trnh by nhng nidung ca file omnetpp.sca v cc gi tr thng k. Vic so snh kt qu canhng ln chy th khc nhau, th chng trnh scalars l la chn hu ch nht.


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Cc th v bng chng trnh Plove trong OMNet++ Trong m hnh m phng mng WiMAX ta s dng chng trnh ny v

th ca 3 tham s : channel utilization, collision length, collision multiplicity. y xem xt ti tham s channel utilization v collision multiplicity phntch, so snh kt qu ca 3 ln chy.

Ln chy th 1


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Cc th v bng chng trnh Plove trong OMNet++Ln chy th 2


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Cc th v bng chng trnh Plove trong OMNet++Ln chy th 3

KT LUN TI


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KT LUN TI So vi cc cng ngh truy nhp v tuyn bng rng c cng phm vi ng dng, WiMAX

l cng ngh ang nhn c s quan tm c bit ca c cc nh sn xut , nh cung cpdch v v ngi s dng nh cc c tnh ni tri ca n.

Thit b WiMAX c chun ha v thng mi ha, cng vi kt qu th nghimWiMAX trn th gii cng nh ti Vit Nam, cc chnh sch pht trin c B Buchnh Vin thng a ra l mt m bo cho vic trin khai WiMAX ti Vit Nam.

Vic trin khai WiMAX ti Vit Nam s p ng c cc i hi ngy mt ln v nhu

cu truy nhp bng rng, gp phn thc y kinh t pht trin, c bit l cc khu vcnng thn, min ni v cc khu th mi.

HNG PHT TRIN TI

Hng pht trin tip theo ca ti l nghin cu su hn v cc gii php iu khintrong WiMAX, c bit l vn v iu ch v h thng anten thch nghi nhm thit kvng phc v c hiu qu nht. Vn bo mt v vn iu ch trong WiMAX cngs c nghin cu su hn nhm a ra nhng yu cu c th ph hp vi mng liVit Nam.


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EM XIN CHN THNH CM N S THEO DIV GP CA QU THY C V CC BN

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