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IEEE802j.162009đượcsửdụngtrongLzone.Hình1.2chothấycácgiaodiệnliênquanđếnchuyểntiếp IEEE802.16m SVTH: Nguyễn Thị Ngọc Quỳnh 11 Đồ án tốt nghiệp đại học Chương I: Kiến trúc mạng Wimax Hình1.2.Cáckếtnốiliênquanđếnchuyểntiếp SVTH: Nguyễn Thị Ngọc Quỳnh 12 Đồ án tốt nghiệp đại họcChương II: Mô hình tham chuẩn chung cho Wimax di động CHƯƠNG II MÔHÌNHTHAMCHUẨN CHUNG CHO WIMAX DI ĐỘNG 2.1.Môhìnhthamchuẩnmạngchung 802.16... thựcthểgiaothứclớpcaohơnsaukhikếtnốitươngứngvớimạng đãđượcthiếtlập.MIHSAPđặctảgiaodiệncủaMIHFvớicácthựcthể lớpcaohơnnhư:lớptruyềntải,phươngtiệnchínhsáchchuyểngiao,và cácgiao thức di ộnglớp2.Trongmôhìnhnày,C-SAPvàMSVTH: Nguyễn Thị Ngọc Quỳnh 25 Đồ án tốt nghiệp đại họcChương II: Mô hình tham chuẩn chung cho Wimax di động SAPcungcấpcácdịchvụliênkếtđượcđịnhnghĩabởiMIH-LINK-SAP;C-SAPcungcấpcác... standardbasedauthentication/encryption:nhậnthực/mậtmãdựatrênchuẩnmậtmãtiêntiến)bả ovệtoànvẹntảitinvàtiêuđềMAC SVTH: Nguyễn Thị Ngọc Quỳnh 21 Đồ án tốt nghiệp đại họcChương II: Mô hình tham chuẩn chung cho Wimax di động Hình2.8.ThựcthểmặtphẳngđiềukhiểnIEEE802.16m 2.2.6.Mặtphẳngquảnlý Mặtphẳngquảnlýcũngđượcđịnhnghĩacholậpcấu hìnhhệthốngvàquảnlýmạngngoài.Vìthếtấtcảcácthựcthểquảnlývàlậpcấuhìnhcũngnhưc ơsởthôngtinquảnlýđềurơivàoloạimặtphẳngquảnlýnày.Địnhnghĩamặtphẳngquảnlýnằm... ảnlýtrạmthuêbaolàmộttậpcácbảntingốcđểquảnlý trạngtháicủađầucuốidiđộng,cácbảntingốcnàycũngđượcsửdụngđểthôngthôngtinNCMS haycácsựkiệnliênquanđếntrạngtháicủađầucuốidiđộng.NCMSlàmộtthựcthểđộclậplớpv àcóthểđượcxemnhưlàmộtthựcthểquảnlýhaymộtphựcthểđiềukhiển SVTH: Nguyễn Thị Ngọc Quỳnh 23 Đồ án tốt nghiệp đại họcChương II: Mô hình tham chuẩn chung cho Wimax di động Hình2.9.Thựcthểmặtphẳngquảnlý IEEE802.16m... tincủagiaothứcnhậnthứckhảmởrộng), cácdịch vụ MIH(MediaIndependentHandover:chuyển giao độclậpphươngtiện).KhôngnhưLTE,IEEE802.16mkhôngđịnhnghĩatườngminhcáckênh logic,truyềntảivàvậtlý(mặcdùtồntạicácchứcnăngnàytrongcácgiaothứccủagiaodiệnvôtu SVTH: Nguyễn Thị Ngọc Quỳnh 24 Đồ án tốt nghiệp đại họcChương II: Mô hình tham chuẩn chung cho Wimax di động yến).Trongtrườnghợpnày,sắpxếpcáckênhlogiclêncáckênhtruyềntảivàsắpxếpcác... tầngmạng Nútdiđộngcóthể pháthiệncácmạngkhảdụng.Hạtầngmạnglưugiữthôngtinmạngtổngthểnhưdanhsáchcácô lâncận,vịtrícácnútdiđộng và sự khảdụngdịchvụ củalớpcaohơn.Cả nútdiđộngvàmạngđềuđưaraquyếtđịnhvềkếtnối Nóimộtcáchtổngquátcảnútdiđộngvàđiểmtruynhậpmạng(chẳnghạncáctrạmgốcvàđiểmt ruynhập) đềucóthểđachếđộ(nghĩalàcókhảnănghộtrợnhiềugiaodiệnvôtuyến).Hình2.10cho thấyMIHF(MediaIndependentHandoverFunction:chứcnăngchuyểngiaođộc.. .Đồ án tốt nghiệp đại học Chương I: Kiến trúc mạng Wimax 2009/802.16m(chẳnghạnấn địnhđịachỉ) • Quảnlýtàinguyênvôtuyến Ngoàicácchứcnăngtrên,đốivớimôitrườngdiđộngvàmáyxáchtay,ASNcònhỗ trợcácchứcnăngsau: • NeodiđộngASN • NeodiđộngNSN • Tìmgọi • TruyềntunnelASN-CSN CSN đượcđịnhnghĩalàmộttậpcácchứcnăngmạng... mạngvôtuyếnliênquanđếntảilưulượngvàcảchứcnăngđiềukhiểntải (cân bằngtải),điều khiển chophépvàđiềukhiểnnhiễu  Quảnlý di ộng Khốiquảnl di ộnghỗtrợcácchứcnăngliênquanđếnchuyểngiaogiữacacRATvànội SVTH: Nguyễn Thị Ngọc Quỳnh 27 Đồ án tốt nghiệp đại học Chương III: Cấu trúc giao thức IEEE 802.16 RAT(RAT:RadioAccessTechnology:côngnghệtruynhậpvôtuyến).Khốiquảnlýd iđộngxửlýviệcbắtcấuhìnhmạng nộiRAThoặcgiữacácRATnhư:quảngcáovàđo,quảnlýcác... hailớpgiaothứcliềnkề.Trênhướngxuống,SDUlàđơnvịsốliệunhậnđượctừlớptrướccaohơn Trênhướnglên,SDUlàđơnvịsốliệuđượcgửiđếnlớpcaohơntiếptheo SVTH: Nguyễn Thị Ngọc Quỳnh 15 Đồ án tốt nghiệp đại họcChương II: Mô hình tham chuẩn chung cho Wimax di động Hình2.4.Môtảkháiniệmdịchvụgiaothức,SDUvàPDU 2.2.2.Giaothức802.16trêngiaodiệnMSvàBS CácPDUquảnlýcủaMACđược traođổitrênkếtnốiquản lýsơcấpcóthểkhởiđộnghoặcđượckhởiđộngbởicác bảntingốcđượctraođổitrênCSAPhoặcMSAPphụthuộcvàotừngkhaithácquảnlýhoặcđiềukhiểncụthể.Cácbảntinđượctraođổitrênk... mạng 802.16 tổng quát NhiềuMScóthểđượcnốiđếnmộtBS.MSkếtnốivớiBStrêngiaodiệnvôtuyếnsửdụng mộtkếtnốiquảnlýsơcấp(kếtnốicơsở)hoặcmộtkếtnốiquảnlýthứcấp.TrongchuẩnIEEE802 16m,cáckiểukếtnốiđượcthaythế bằngcáckiểukếtnối mới SVTH: Nguyễn Thị Ngọc Quỳnh 13 Đồ án tốt nghiệp đại họcChương II: Mô hình tham chuẩn chung cho Wimax di động 2.1.2.Hệthốngđiềukhiểnvàquảnlýmạng HệthốngđiềukhiểnvàquảnlýmạngkhôngphảilàmộtbộphậncủacáctiêuchuẩnIEEE . ! 2 MNOPS     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