小規(guī)模應用層組播及其在視頻會議系統(tǒng)中的應用.pdf

1、中南大學碩士學位論文小規(guī)模應用層組播及其在視頻會議系統(tǒng)中的應用姓名：馮佳申請學位級別：碩士專業(yè)：計算機應用技術指導教師：黃東軍20090510ABSTRACTApplicationlayermulticastachievemulticastinformofmultipleunicastinapplicationlayer，itbypasstherestrictionsofthenetworklayerbysuchway，buttheco

2、stistheconsumptionofnetworkbandwidthresourcesandthesoftwaresystemresourcesTherefore，largescaleapplicationlayermulticastcanonlyachieveonetomanyapplicationsofsinglesource；andmultisourceapplicationlayermulticastalgorithming

3、eneralforsmallscaleapplications，suchassmall—scaledesktopvideoconferencingclassExistingsmallscaleapplication—layermulticastalgorithmforpriorityuseofthegrid，multi—sourcestrategyoftreecover，thealgorithmisverycomplexanddiffi

4、culttoachieve，toomuchadministrativeoverhead；sometreepriorityofthecentralizedalgorithmandtheexistenceoftheprogramthefunctionofthehubthroughahighintegrationofthenetworkstatuschangestakentooptimizethemulticasttree，suchasthe

5、shortcomingsofthestrategyisnotflexibleenoughAndhowthelimitedbandwidthconditions，thebettertomeetthemulti—sourcemulti—mediaapplicationsrequirerealtime，stabilityhasbecomethesmall—scaleapplication—layermulticastalgorithmofth

6、emainissuesthatneedtoberesolvedInthispaper，theapplicationlayermulticasttechnologyprogress，theexistingsmall—scaleapplicationlayermulticastalgorithmsareclassifiedanddetailedanalysisandassessmentoftheadvantagesanddisadvanta

7、gesofvariousalgorithmsislocatedFollowedbyadesktopvideoconferencingsystemsforsmallscaleapplication—layermulticastalgorithmforsmallscalegroupcommunicationneedsandthecharacteristicsofacentralizedgroupmanagementstrategiesint

8、hestrategy，thefocalpointsresponsibleforcollectingandrecordsofmembersofthenodestatusinformation，aswellasinstitutionstoshareinformationmulticasttree；multicasttreenodegroupintheaccessionprocesstousethisinformationtoselectth