WIMAX-Chuong1-GioiThieuTongQuanVeWimax

8/14/2019 WIMAX-Chuong1-GioiThieuTongQuanVeWimax

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TS.V Trng Sn Chuyn v tuyn s

CHUYN V TUYN S

(CHUYN WIMAX)

GiNG VIN: TS. V TRNG SN

CHUYN NGNHK THUT ViN THNG


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Ti liu tham kho Jeffrey G. Andrews, Fundamentals of WiMAX

Understanding Broadband Wireless Networking, Prentice

Hall, 2007 IEEE Std 802.16-2004

IEEE Std 802.16e-2005

Nguyn Th Thy, Mng Wimax v th nghim ti VitNam, i hc Thi Nguyn, 2008

on Quan Hoan, Tnh hnh pht trin v xu hng phnb bng tn cho thng tin v tuyn, website Cc tn s

v tuyn in B thng tin v truyn thng. Trn Xun Nam, Tng quan v OFDM, bi ging, Hcvin K thut qun s.

www.wimax.com


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Ni dung mn hc

Chng 1: Gii thiu tng quan v WiMax (4 tit).

Chng 2: Kin trc mng WiMax (4 tit).

Chng 3: Nn tng k thut ca WiMax (7 tit).


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CHNG I

GiI THIU TNG QUAN V WIMAX

(4 Tit)

CHUYN V TUYN S


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Ni dung ca chng I

Nhng thch thc k thut i vi WiMax.1.4

Nhng thch thc thng mi i vi WiMax.1.3

Phn b tn s cho v tuyn bng rng1.2

WiMax v cc cng ngh v tuyn bng rng khc1.1


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WiMax v cc cng ngh v tuyn bng

rng khc Wireless PANs

Bluetooth IEEE 802.15

Phm vi rt hp (


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rng khc

Wireless LANs (WiFi IEEE 802.11)Mng c s h tng hoc Mng ad-hoc

H gia nh / Vn phng


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rng khc

Multihop Ad hoc NetworksKhi khng c c s h tng

(khng thc hin c / t)

Qun s / khn cp


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rng khc

Wireless MANs

WiMAX-802.16C nhGing cc mng t boCc BS


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rng khc Wireless WANs

WiMAX-802.16e

3G, 4GCc BS


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rng khc


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rng khc


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Wimax l g? WiMAX (Worldwide Interoperability for Microwave

Access)

L chun kt ni Internet bng thng rng khng dy khong cch ln.

H tiu chun IEEE 802.16

Vit Nam c 4 doanh nghip ang trin khai th nghim:Tp on BCVT (VNPT),

Tng cng ty Truyn thng a phng tin (VTC),

Tng cng ty vin thng qun i (Viettel)

FPT.


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802.16a(1/ 2003)

Extension for 2-11 GHz: Targeted for non-line-of-sight, Point-to-Multi-Pointapplications like last mile broadband access

802.16(12/ 2001)

Original fixed wireless broadband air Interfacefor 10 66 GHz: Line-of-sight only, Point-to-Multi-Point applications

802.16c(2002)

802.16 Amendment

WiMAX System Profiles

10 - 66 GHz

802.16REVd(802.16-2004)

(Oct 2004)

Adds WiMAX System Profiles and Errata for2-11 GHz

802.16e(802.16-2005)

(Dec 2005)

MAC/PHY Enhancements to supportsubscribers moving at vehicular speeds

Lch s cc chun Wimax


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M hnh Wimax c nh


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M hnh Wimax di ng


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Cc ng dng ca cc chun 802.16


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Cc cu hnh: im - im (PTP)

S dng mt hoc nhiu lin kt im im

Cc anten c tnh nh hng cao ti hai u cui mi lin kt


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Cc cu hnh: im a im (PMP)

S dng mt hoc nhiu BS c cng sut ln v nhiu SS

SS c th s dng cc anten nh hng, BS c th dng nhiu antennh hng

BS l im trung tm cho cc trm thu bao SS.

hng DL c th l qung b, a im hay n im


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Cc cu hnh: Li (Mesh)

SS c th lin lc trc tip vi nhau.

Trm gc Mesh BS kt ni vi mt mng bn ngoi mng MESH.


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Ni dung ca chng I






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Phn b tn s cho v tuyn bng rng Thng tin di ng t bo

GSM 900MHz, 1800MHz, CDMA 800 MHz,

3G: 1900-2200MHz, 2500-2690MHzang xut thm 450-470MHz, 2300-2400MHz, 3300-

3400MHz, 3400-4200MHz, 4400-4990MHz


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Phn b tn s cho v tuyn bng rng V cng ngh, WiMAX lm vic 2 bng tn:

10-66 GHz v 2-11GHz

Bao gm c hai bng tn ng k v khng ng k Hin nay:

2300-2400 MHz, 2500-2690 MHz (WiMAX di ng)3400-3600 MHz (WiMAX c nh)

Vit nam:Bng tn 3.5GHz c s dng cho h thng v tinh

Vinasat,Cc bng 2.3GHz, 2.5GHz ang c s dng bi cc

h thng viba, h thng truyn hnh MMDSTh nghim WiMAX ch mi c thc hin i vi dch

v WiMAX c nh ti bng tn 3.3-3.4GHz.


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Phn b tn s cho v tuyn bng rng ITU ang xem xt xut a tiu chun WiMAX di ng

vo h tiu chun thng tin di ng k tip (IMT)

Hin nay, IMT bao gm cc giao din v tuyn WCDMA,CDMA 2000, TD-SCDMA.

Nhiu kh nng giao din ca WiMAX di ng theo chun

IEEE 802.16e s c kt np vo h tiu chun IMT. S gii quyt c tranh chp v vic s dng cc bngtn 2300-2400MHz v 2500-2690MHz

Cc loi dch v khc: sinh vin t nghin cu


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Ni dung ca chng I






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Nhng thch thc thng mi i vi

WiMax i th ca Wimax l 3G LTE (Long Term Evolution)

C hai u l c vin sng gi cho mng di ng 4G.

Cc thch thc v thng mi i vi Wimax bao gm:Th phn

Tnh k tha

Tnh tng thchTnh thun li trong trin khai


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WiMaxTh phn:

Mng thng tin di ng ngy nay: > 2,6 t thu bao

WiMAX gp nhiu kh khn tm kim th phn

Tnh k tha:3G LTE c mt cng ngh i trc l 2G, 3G vi s

lng thu bao c sn.WiMAX phi trin khai mng t con s khng


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WiMaxTnh tng thch:

WiMAX khng tng thch vi cc chun di ng trc

tch hp thit b u cui WiMAX vi chip 2G/3G?

Trin khai:vic trin khai 3G LTE t mng 3G, 3.5G c sn l mt con

ng d dng, tn dng c c s h tng c sn.Wimax phi trin khai t u


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Ni dung ca chng I






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Nhng thch thc k thut i vi WiMax WiMAX di ng cha p ng c cc tiu ch k

thut cn thit ca IMT-2000 nh:

Cc tham s v c tnh pht x,H s d knh ln cn (ACLR),

Cht lng cc dch v ca mng chuyn mch knh,

Yu cu v chuyn vng (seamless handover),


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Nhng thch thc k thut i vi WiMax


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Nhng thch thc k thut i vi WiMax 3G LTE vt IEEE 802.16e v c tnh nng di ng v

tc truyn d liu

WiMAX di ng Rel 2 (IEEE 802.16m) ha hn nhngtnh nng vt tri so vi 3G LTE

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