Mesh network yog "wireless grid network", yog ib lub network "multi-hop", yog tsim los ntawm ad hoc network, yog ib qho ntawm cov thev naus laus zis tseem ceeb los daws qhov teeb meem "kawg mais". Hauv cov txheej txheem ntawm kev hloov pauv mus rau tiam tom ntej network, wireless yog ib qho thev naus laus zis tseem ceeb. Wireless mesh tuaj yeem sib txuas lus ua ke nrog lwm lub network, thiab yog ib lub network architecture dynamic uas tuaj yeem nthuav dav tas li, thiab ob lub cuab yeej twg tuaj yeem tswj tau kev sib txuas wireless.
Qhov xwm txheej dav dav
Nrog rau cov yam ntxwv ntawm kev sib txuas ntau-hop thiab Mesh topology, wireless mesh network tau hloov zuj zus mus ua ib qho kev daws teeb meem zoo rau ntau yam wireless access networks xws li broadband home network, community network, enterprise network thiab metropolitan area network. Wireless Mesh routers tsim AD hoc networks los ntawm kev sib txuas ntau-hop, uas muab kev ntseeg siab dua, kev pabcuam dav dua thiab tus nqi qis dua rau WMN networking. WMN tau txais feem ntau ntawm cov yam ntxwv ntawm wireless AD hoc networks, tab sis muaj qee qhov sib txawv. Ntawm ib sab tes, tsis zoo li kev txav mus los ntawm wireless Ad Hoc network nodes, qhov chaw ntawm wireless Mesh routers feem ntau yog kho. Ntawm qhov tod tes, piv rau wireless Ad Hoc networks uas muaj zog, wireless Mesh routers feem ntau muaj lub zog fais fab kho. Tsis tas li ntawd, WMN kuj txawv ntawm wireless sensor networks, thiab nws feem ntau xav tias tus qauv lag luam ntawm wireless Mesh routers yog qhov ruaj khov, zoo ib yam li lub network nkag mus lossis lub network hauv tsev kawm ntawv. Yog li ntawd, WMN tuaj yeem ua haujlwm ua lub network xa mus nrog cov kev pabcuam ruaj khov, xws li lub network infrastructure ib txwm muaj. Thaum xa mus rau ib ntus rau cov haujlwm luv luv, WMNS feem ntau tuaj yeem ua haujlwm ua cov tes hauj lwm txawb AD hoc ib txwm muaj.
Lub architecture dav dav ntawm WMN muaj peb lub ntsiab lus sib txawv ntawm wireless network: gateway routers (routers nrog gateway/bridge capabilities), Mesh routers (access points), thiab Mesh clients (mobile lossis lwm yam). Mesh client txuas nrog wireless Mesh router los ntawm kev sib txuas wireless, thiab wireless Mesh router tsim ib lub network forwarding ruaj khov hauv daim ntawv ntawm multi-hop interconnection. Hauv lub network architecture dav dav ntawm WMN, txhua lub Mesh router tuaj yeem siv ua lub data forwarding relay rau lwm lub Mesh routers, thiab qee lub Mesh routers kuj muaj peev xwm ntxiv ntawm Internet gateways. Lub gateway Mesh router xa cov tsheb khiav ntawm WMN thiab Internet hla lub high-speed wired link. Lub network architecture dav dav ntawm WMN tuaj yeem suav tias yog muaj ob lub dav hlau, uas lub access plane muab kev sib txuas network rau Mesh clients, thiab lub forwarding plane xa cov kev pabcuam relay ntawm Mesh routers. Nrog rau kev siv ntau ntxiv ntawm virtual wireless interface technology hauv WMN, lub network architecture tsim los ntawm WMN tau dhau los ua nrov dua.
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Kev sib txuas lus MESH
Hauv kev sib txuas lus Mesh, cov yam xws li kev cuam tshuam ntawm cov channel, kev xaiv tus lej hop thiab kev xaiv zaus yuav tsum tau xav txog kom meej. Ntu no siv WLANMESH raws li 802.11s ua piv txwv los tshuaj xyuas ntau yam kev sib txuas lus uas ua tau. Cov hauv qab no piav qhia txog kev sib txuas lus ib zaug thiab ob zaug thiab lawv cov kev ua tau zoo.
Kev sib txuas lus MESH ib zaug xwb
Txoj kev npaj networking ib zaug zaus feem ntau yog siv rau hauv thaj chaw uas cov khoom siv thiab cov peev txheej zaus muaj tsawg. Nws muab faib ua ib zaug zaus ib zaug-hop thiab ib zaug zaus ntau-hop. Hauv kev sib txuas lus ib zaug zaus, txhua qhov chaw nkag wireless Mesh AP thiab qhov chaw nkag wired Root AP ua haujlwm hauv tib lub zaus band. Raws li pom hauv Daim Duab 1, channel 802.11b/g ntawm 2.4GHz tuaj yeem siv rau kev nkag mus thiab xa rov qab. Raws li qhov sib txawv channel cuam tshuam ib puag ncig thaum lub sijhawm siv cov khoom thiab lub network, channel siv ntawm hops yuav yog ib qho channel tsis cuam tshuam ywj pheej, lossis yuav muaj qee qhov channel cuam tshuam (feem ntau ntawm qhov kawg hauv qhov chaw tiag tiag). Hauv qhov no, vim muaj kev cuam tshuam ntawm cov nodes nyob sib ze, txhua lub nodes tsis tuaj yeem txais lossis xa tib lub sijhawm, thiab MAC mechanism ntawm CSMA/CA yuav tsum tau siv los sib tham hauv ntau-hop. Nrog rau kev nce ntawm cov hop suav, bandwidth faib rau txhua Mesh AP yuav txo qis, thiab qhov tseeb ib zaug zaus network kev ua tau zoo yuav raug txwv heev.
Kev sib txuas lus MESH ob zaug
Hauv kev sib txuas lus dual-band, txhua lub node siv ob lub zaus sib txawv rau kev rov qab thiab kev nkag mus. Piv txwv li, qhov kev pabcuam nkag mus hauv zos siv 2.4GHz 802.1lb/g channel, thiab lub backbone Mesh backpass network siv 5.8GHz 802.11a channel yam tsis muaj kev cuam tshuam. Ua li no, txhua Mesh AP tuaj yeem ua haujlwm rov qab thiab xa mus tom ntej thaum pabcuam cov neeg siv nkag mus hauv zos. Piv nrog rau lub network zaus ib zaug, lub network zaus ob zaug daws qhov teeb meem cuam tshuam ntawm kev xa rov qab thiab kev nkag mus, thiab txhim kho kev ua haujlwm ntawm lub network zoo heev. Txawm li cas los xij, hauv qhov chaw ib puag ncig tiag tiag thiab kev sib txuas lus loj, vim tias tib lub zaus siv ntawm cov kev sib txuas rov qab, tseem tsis muaj kev lees paub tias tsis muaj kev cuam tshuam ntawm cov channel. Yog li ntawd, nrog rau kev nce ntawm cov hop suav, bandwidth faib rau txhua Mesh AP tseem yuav poob qis, thiab Mesh AP nyob deb ntawm Root AP yuav muaj qhov tsis zoo hauv kev nkag mus rau channel. Yog li ntawd, cov hop suav ntawm dual-band networking yuav tsum tau teeb tsa nrog kev ceev faj.
Lub sijhawm tshaj tawm: Lub Ib Hlis-12-2024