Experimental QoStestofMedical Data over WiredandWireless Networks
Jae-Min Lee, Jong‐Hyouk Lee · 2008
Moderntelemedicine systems transmit medical dataonwiredandwireless networks without classification of medical data. However, suchmedical dataincluding vital sign, image, andvideo havedifferent priorities asoccasion demands. Thus,inthis paper, weclassify medical dataaccording toQoS classification andpresent test-bed fortransmitting QoSenabled medical dataoverwiredandwireless network. Also, weshow experimental results withthetest parameter, suchasavailable bandwidth andpriority. IndexTerms-Medical Data,QoS,Diff-Serv, DSCP field, Queuediscipline I.INTRODUCTION Advanced wired andwireless technologies extend network abilities andperformances. We coulduseInternet, tele- banking andonline commercial business anywhere. Those enhanced technologies alsoeffect tomedical environments. Doctors coulddiagnose farfromtheir patients andask medical advice toother doctors atadistance. Inspecially, whenanemergency medical situation isoccurred bya typhoon, aflood, oramassive explosion, medical datathat isneeded tomedical careforpatients ismoreimportant thannormalsituation. Medical datawhichcontain vital signals, telemedicine video dataandX-rayimages mustbe transmitted reliably because those data aredirectly related to patients' life. However, normal network provides Best-effort service totransmit packets. Therefore, credibility ofmedical dataisnotguarantee inemergency medical environment wheremedical dataincreases explosively. Ifmedical dataof vital-sign signal orcontrol message ofmedical equipment isdropped ordelayed withtransmission ofalarge quantity data, itisdifficult tosavethepatient's life. Bythis reason, weneedQoSfortransmission ofmedical datainemergency medical environment. Inthis paper, webuild testbed whichcontains unixbased routers toapply QoSpolicy andtotest fortransmitting QoS enabled medical data. Wedefine eachofmedical data usedin test andclassify them. Also, wecreate queuediscipline based onpriority andbandwidth andimplement this withTraffic Control NextGeneration (TCNG)toapply ourtestbed. Inour testbed, wewill confirm guarantee ofpriority andbandwidth ofdefined medical datawithourscenario inwiredand wireless networks. Therest ofthis paper isorganized asfollows. InSection 2, wedescribe QoS,DSCPandTC.InSection 3,weintroduce ourtestbed, defined medical data, queuediscipline, andtest tool. InSection 4,weexplain ourscenario ofQoStest with medical dataandpresent experimental result witheachof scenarios andthenweconclude this paperinSection 5.