Luận văn tìm hiểu và nghiên cứu mạng không dây wimax

BO GIAO DI C VA DAC , TAO TWANG 13$1 HQC THONG LONG -o0o - KHOA LUAN TOT NGHIEP TIM HIEU VA NGHIEN °UV M4NG KHONG DAY VVIMAX Ciao vien hirerng chin : Mani Thanh Giang Sinh vien thvc hien : Tan Thai Linh : a13520 Ma sinh vien : CONG NCH* THONG TIN Chuyen nghanh HA NQI - 2013 MUC LUC CHUONG GIOI THI$U CHUNG VE WiMAX 1.1 GIOI THI$U CHUONG 1.2 MAI NIEM 1.3 CAC CHUAN CUA WiMAX 1.3.1 Chuan IEEE 802.16 - 2001 1.3.2 Chan IEEE 802.16a 1.3.3 Chuin IEEE 802.16 - 2004 1.3.4 Chuan IEEE 802.16e 1.4 P116 WiMAX 1.4.1 Bang tat ding k9 ' 1.4.2 Bang tin khong dAng k9 5GHz 1.5 TRUYEN SONG 1.6 UV DIEM VA NHUM DIEM COA CONG NGHE WiMAX 10 1.7 TiNH HiNH TRIEN KHAI WiMAX 13 1.7.1 rmh hinh trien khai WiMAX tren the glen 13 1.7.2 Tinh hinh trien khai WiMAX this nghiem tai Viet Nam 13 1.8 KET LUAN CHUONG 14 CHUONG CAC KV THUAT MAX SlY DUNG THONG WiMAX 15 2.1 GIOI TH1EU CHUONG 15 2.2 Kt THUAT OFDM 16 2.2.1 Khai niem 16 2.2.2 So dó khOi OFDM 17 2.2.3 ChuOi bao ye he thong OFDM 18 2.2.4 Nguyen tic giai dieu the OFDM 19 2.2.5 Cac uu vi nhtrqc diem cita ki thuit OFDM 19 2.3 Kt THUAT OFDMA 21 2.3.1 IChai niem 21 2.3.2 Dec diem 22 2.3.3 OFDMA nhay rim 23 2.3.4 He thong OFDMA 25 2.4 Dieu the thich nghi 26 2.5 Cling nghe sin 16i 27 2.6 Dieu khien c8ng suit 27 2.7 Cac ding nghe anten tien tiAn 27 2.7.1 Phan tip thu va phit 27 2.7.2 Cic he thOng anten thich nghi 2.8 KET LUAN CHUONG CHUONG MEN TRIJC MANG TRUY CAP WIMAX 28 29 30 3.1 Gist THIEU CHUONG 30 3.2 MO HINH THAM CHIEU 30 3.3 LOP DIEU KHIEN TRUY NHAFIMOI TRUONG (MAC) 32 3.3.1 Ket not vi dja chi 32 3.3.2 Lop hOi ta MAC 34 3.3.3 Lop phin chung MAC 34 3.3.4 Ca the yeu au vi cap Oat bang th8ng 38 3.3.5 Co the 40 lich djch va vi chit Itrong djch v0 (QoS) 3.4 LOP VAT Lt 42 3.5 KET LUAN CHUONG 44 CHUONG MO PHONG HO/ST HONG 14 THONG WiMAX 45 4.1 GO! THIEU CHUONG 45 4.2 MOI TRUONG MO PHONG 45 4.3 MO PHONG 47 4.3.1 Gia thuyet 47 4.3.2 Kjch bin mo phong 47 4.4 PHAN T1CH KET QUA MO PHONG 50 4.4.1 Holt dOng 50 4.4.2 Tinh lunng bring th8ng dirqc s* dung ten cic Node 51 4.5 NHAIsIXET 56 KET LUAN VA MANG PHAT TRIEN DE TAI 57 TAI LIEU THAM KHAO 58 Phv Ivc A: Gil trj truirng Type thong blo quin trj lop MAC 59 MVC LUC HIM! VE Hinh 1.1 Minh hos hoot dOng WiMAX [10] Hinh 1.2 Truyen sling tnrang hop NLOS [10] 10 Hinh 2.1 So sanh gift FDMA va OFDM 16 Hinh 2.2 Sa d6 khoi he th6ng OFDM 17 Hinh 2.3 Khai niem ve chu6i bito vg 18 Hinh 2.4 ISI va cyclic prefix 19 Hinh 3.1 MO hinh them chieu [5] 30 Hinh 3.2 Chile nang ck lap m8 hinh phan lop chart IEEE 802.16 31 Hinh 3.3 Luling der lieu qua each!, 31 Hinh 3.4 Djnh dung MAC PDU 35 Hinh 3.5 Djnh dung cua tieu de MAC PDU chung 36 Hinh 3.6 Djnh dung tieu de yeu cau diti thong 37 Filth 4.1 Module WiMAX kien true NS-2 [13] 46 Hinh 4.2 MO hinh mung m8 phong 48 Hinh 4.3 Lien ket giOn MS va cac BS 51 Hinh 4.4 Mac nang luong giera cell 51 Hinh 4.5 Ck tratmg event file barn vet —.tr 52 Hinh 4.6 Ck trutmg Wireless Event 53 MUC LVC BANG Bang 1.1 Tom tit ck dac thing ca ban dm chutur WiMAX[6] Bang 3.1 Cac trtdmg tier' de MAC chung 37 Bang 3.2 Cac trtrOng tieu de MAC you cau diti thong 38 Bang 3.3 Dac to vat!), char' IEEE 802.16 42 Bang 4.1 KM qua thei gian chuyen giao cita MS 55 MVC LVC BIEU De) Bleu 4.1 Thong Itrong SS MN di chuyen veri ttic dO m/s 54 Bieu 4.2 Thong luong SS MN di chuyen vai t6c 4.147 m/s 54 Bieu 4.3 Thong luong SS MN di chuyen v6i tin dO 8.3 m/s 55 P HV LVC Phu luc A: Gia tri trtrOng Type thong bio quitn try' lop MAC Phu luc B: Giao thin djnh tuyen DSDV Phu lye C: Cal rig NS-2 tren nen Ubuntu 12.04 Danh myc thy& ngti va cac tic viit tat DA' MVC THUAT Nay VA cAc Te VIET TAT AAS Advanced Antenna Systems - Cac he then anten thich nghi AES Advanced Encryption Standard - Chitin ma hem nang cao AK Authentication Key - Khoa chimg thgc ARQ Automatic Repeat reQuest - Tis dOng lap lai yeu au ATM Asynchronous Transfer Mode AWGN Additive White Gaussian Noise - Nhieu Gaussian trang cong BE Best Effort BER Bit Error Rate - Ti le lei bit BPSK Binary Phase Shift Keying - dilu the pha nhj phan BS Base Station - Tram gee CDMA Code Division Multiple Access - Da truy cap phan chia theo ma CID Connection Identifier - Dinh danh ket not CP Cyclic Prefix - Tien CPE Customer Premise Equipment CRC Cyclic Redundancy Check - Kiem tra 18i du yang DFS Dynamic Frequency Selection — bra chgn tin se dOng FDD Frequency Division Duplex - Ghtp kenh phan chia theo tan se FFT Fast Fourier Transform - Chuyen dei Fourier nhanh GSM ICI to Wong Global System for Mobile communications - He thong thong tin di dOng town cau InterChannel Interference - Nhieu xuyen kenh IDFT Inverse Discrete Fourier Transform - Bien dei Fourirer tin rac ngtrgc IEEE Institute of Electrical and Electronics Engineers cac Ky Su Dien va Dien Tar HQC Vien ciia IFFT Inverse Fast Fourier Transform - Bien del Fourier ngugc nhanh ISI Inter-Symbol Interference - Nhieu xuyen ky tir Danh myc thueit ngt7 KEK LOS MSHOREG va cdc tit vdt tin Key Encryption Key Line Of Sight - Tim nhin thing Mobile Station Handover Request — yeu ciu chuyen giao tram di dOng MAC Media Access Control - Dieu khien truy nhop m8i twang MAN Metropolitan Area Network — Mang thj MIMO Multiple Input Multiple Output - Nhieu dau vao, nhieu dau MISO Multiple Input Single Output - Nhieu dau vio, mOt dau MS Mobile Station NLOS Non—Line-Of-Sight - IChong tam nhin thing nrtPS non—real-time Polling Service OFDM Orthogonal Frequency Division Multiplexing - Ghop kenh phan chia theo tan so trirc giao OFDMA Orthogonal Frequency Division Multiple Access - Da truy cip ghep kenh chia tin se tray giao PDU Packet Data Unit - Don vj gOi der lieu PKM Privacy and Key Management - Quin ber sv rieng to va kh6a QAM Quadrature Amplitude Modulation - Dieu the bien dO true giao QoS Quality of Service - Chit Itrong djch vv QPSK Quadature Phase Shift Keying - dieu the pha trvc giao RSSI Receive Signal Strength Indicator — Cuong dO tin hieu nhin duqc so v8 tuyen RF Radio Frequency - Tin rtPS real-time Polling Service SDU Service Data Unit - Dun vj dtk lieu djch vtr SLA Service-Level Agreement - Theta thu$n mirc (Bch vv SNR Signal-to-Noise Ratio — Ti le tin hieu ten nhien Danh myc thuat ngu va ccic tit vilt tat SS Subscriber Station - Tram thue bao TDM Time Division Multiplexing — Ghep With phan chia theo thin gian TDMA Time Division Multiplexing Access — Da truy cap phan chia theo thin gian TEK Traffic Encryption Key - Khda ma h6a luu lucrng UDP User Datagram Protocol UGS Unsolicited Grant Services UMTS Universal Mobile Telephone System WiFi Wireless Fidelity WiMAX Worldwide interoperability for Microwave Access WLAN Wireless Local Area Network — Mang cuc khong day Mix dins M O DA U De dap ang nhu cau thuc to hien ve toe deo truyen da lieu cao, bang th8ng Ong han, h6 trq nhieu mire djch vu (QoS), tinh di dOng nOi mang hay gifta cac mang sir dung cong nghe khac vit gifts cac nha cung cap djch v6i VI vay xu huong phat trien mang the he sau di sau vio tinh chart h6a, cho phop xity dtmg kieu mang kh8ng phi; dmijc vao cac duet bi sir dung no vi tuang tac giOra cac kieu mpg khac b mat dO cao MOt cling ngh'e da vi dang duqc phat trien nham dap (mg cac nhu au ke tren, duqc chuan hem beri t6 chic IEEE (Institute of Electrical and Electronics Engineers) - cling nghe IEEE 802.16 hay duqc gqi la cong nghe WiMAX dinh cho ket not bang thong Ong khong day khan cach 16n Cac cong nghe truy cap kh8ng day hien tai han the ve tee dO truyen du lieu, h6 trq mac dich vu chua linh hog, pham vi phi song hp Do cong nghe WiMAX duqc phat trien luting t6i nave dich khAc phuc, hob thin vi fling cao cac dac tinh manh me cita cong nghe mang khong day Luan van se tap thing vao viec nghien cfru cac 16p Dieu khien truy nhop mei truang MAC cong nghe 802.16, qua trinh bay nhOng van de co ban ve cong nghe WiMAX ding nhu cac chart WiMAX, cac Id thug img dung WiMAX, mo hinh phan 16p tong cong nghe WiMAX Tiep theo, de lain re quy trinh lam viec cita he thong mang WiMAX, luan van se gieri thieu mo phong hog dOng dui he thong WiMAX cling nhu phan m'em ho trq m8 phong cac hog dOng Ulan van bao gem clurcmg: Chuang 1: Gi6i thieu chung ve WiMAX Chuang 2: Cac kg dwelt duqc sir dung WiMAX Chuang 3: Kien true mang truy cop WiMAX Chuang 4: Chuang trinh m8 phi:mg WiMAX Chuang 4: MO' ph6ng hogt cling he thing WiMAX 4.4 PHAN TiCH KET QUA MO PHONG 4.4.1 Hottt 'ging Vao theri diem bit dAu me phong, cite SS tiin hash quet cac kenh dai tin dd duqc djnh nghia de tim met kenh downlink thich hqp va deng b6 Sau do, cac SS than cac thong bao me ti kenh vat ljr DCD (downlink) vi UCD (uplink) de lay cac thong s6 can thief Tiep do, cac SS giri you cAu ranging (thong bao RNGREQ) den BS BS giri lai the dip Cmg ranging (thong bao RNGRSP) va the thong bdo ULMAP, DLMAP chira cac thong tin lop MAC nhu thai diem truy cap va cac thong tin khac ten ca hai kenh uplink va downlink BS phvc yang SS tam tru giri met yeu cAu den the BS ling gieng, xay twang hqp: Tnrong hqp 1: BS phvc 91 dip Cmg nhu cAu ctia SS lap tire Tnrong hqp 2: BS eking be hem veri cac BS lang gieng nhim phac va SS SS roamming Twang hqp 3: kh8ng dip ling nhu au SS se gin tin nhin MSHO-REQ den BS phac va no: la logi tin nhin MAC MOB MSHO REQ Da lieu bao gem ID hay chi se RSSI cua tram BS phvc vv ID hay chi se RSSI cua tram BS hang thin cling duqc phat hien qua trinh quet Cac BS phvc vv se dip img 14i cac SS voi in nhin MSHO-RSP co dang MAC MOB BSHO RSP, veri met mac tieu ma BS phvc IN de nghi (met BS lang gieng co cuOng de tin hieu manh nhAt (RSSI manh nhat)) SS nhan phan he'd tir BS phvc va hien tai vi bit dAu Handover veri de nghj cga BS lang gieng Neu de nghj ctia cac BS 11 khac fir BS hien tai, SS se giri met thong dip den BS phac va hien tai Sau dA nhan duqc thong bao RNGRSP tir BS Tai thai diem 1, SS giri yeu cau cap phat bang th8ng (thong bao BWREQ) cho BS, sau nhan duqc bang thong cap phat, SS bit du truyen du lieu den BS - 50 - Chuvng 4: Me) phong hoot Ong hg theing WiMAX UL and DL carom Only signal strength measurement Include Traffic No traffic Hinh 4.3 lien kit giiia MS WI cac BS Rink 4.4 Mtir nang luTtng gifia cell 4.4.2 Tinh hoyng bang thong durcre sir dyng teen de Node • Cac thong tin cfm mo phong di:cc ghi loi file —.tr tuong ling bao gom kieu sv kin (send, receive, drop, forward), thbi diem xay sv ki$n, ntit nguem, nut dich, th8ng tin goi va kich thtrerc gen, kieu trace duce set dung - 51 - Chuang 4: Mo ph6ng hogt clOng he thong WiMAX Trong do: Event Abbreviation Type I Value Oci Od Id Os Id I Id 114.0d OdAd lid Id double [rime int (Link-layer) Source Node int (Link-layer) Destination Node string Packet Name r Receive d: Drop Normal Event e: Error +: Enqueue -: Dequeue int Packet Size string Flags int Flow ID int (Network-layer) Source Address int Source Port int (Network-layer) Destination Address int Destination Port int Sequence Number int Unique Packet ID Hinh 4.5 Ccic Throng event file barn vet - 52 - Chuang 4: MO phong hoot dang hg thong WiMAX Event 'Abbreviation Flag Value Type [lime (" For Global Setting) -Ni int Node ID -Nx double Node X Coordinate -Ny double Node Y Coordinate -Nz double Node Z Coordinate -Ne s: Send r: Receive Wireless Event d: Drop f: Forward double double Node Energy Level -NI string Network trace Level (AGT RTR MAC etc.) -Nw string Drop Reason -Hs int Hop source node ID -Hd int Hop destination Node ID -1 -2 -Ma hexadecimal Duration -Ms hexadecimal Source Ethernet Address -Md hexadecimal Destination Ethernet Address -Mt hexadecimal Ethernet Type -P string Packet Type (arp, dsr imep tora etc.) -Pn string Packet Type (cbr tcp) Rink 4.6 Ow among Wireless Event Sau import thong tin file —.tr dm mo phong vao excel , chUng to tiers harsh thong ke cac s6 liltu tai node MS va BS Ttic dO dm node MS duqc thay d6i tan tic m/s, 1.167 m/s, 8.3 m/s MO phong duqc thue hiOn teen quAng dutmg 115m Tqa dO cac mOc MS, BSI, BS2 nhu sau: MS(30, 50), BS1(50, 50), BS2(65, 50) - 53 - Chuang 4: Mo phong host tieing A he thong WiMAX throughput (kbps) 100 throughput at lms 90 a 80 70 60 so ea 30 20 10 time (s) 10 20 60 30 70 Bilu 4.1 thong lucmg SS nhdn MN di chuyen yeti tik de, m/s throughput abps) so 70 50 50 — throughput at 4.167ms so I 50 20 10 time (s) 0 15 10 20 25 Bieu dj 4.2 thong Wong SS nh (in MN di chuyin voi toc dO 4.147 m/s - 54 - Chuang 4: Me phong hogt tong hg thong WiMAX ibraughput (kbps) 90 - throughput at 8.3ms 20 10 time (s) 10 12 14 Bleu dá 4.3 thong lutmg SS nh4n MN di chuyin voi tac 8.3 m/s lat qui mo ma phdng thu Toe del Mae bat tau chuyin giao Moe kit thtic chuyin giao Thiri gian chuyin giao (s) 1 m/s 39.79975795 40.10000042 0.3002424 4.167 m/s 1119026144 13.50827248 0.3180110 8.3 m/s 9.00455622 9.40058817 0.3960320 Bang 4.1 Kit qua theft gian chuyin giao czia MS - 55 - Chuang 4: MO ph6ng hoot &Ong he thing WiMAX 4.5 NH4N XET Thtri gian chuy'en giao dm MS ngemg cho phdp, qud trinh girl g6i tin tir MS din SS, thtri gian chuyen giao cdc mo phong deu