universal radio communication tester ¸cmu 200 · ¸cmu200 applications ... entire operating system...
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Universal Radio Communication Tester ¸CMU 200Testing Applications in Mobile Radio Communications
September
2005
Ethernet RF
HTTP
Ser
ver
Vide
o St
ream
ing
MM
SC
FTP
Serv
er
Services
TCP / UDP
IP
Data Link Layer
Physical Layer
Applications
. . .
Ether-net
RF
Relay
WEB
Bro
wse
r
Vide
o St
ream
ing
MM
S Cl
ient
TCP / UDP
IP / PPP / ...
PDCP / RLC / MAC
Physical Layer
. . .. . .
IP
Data Link Layer
Physical Layer
IP
PDCP / RLC / MAC
Physical Layer
� ¸CMU 200 Applications
CMU goes Internet: Testing data applications for WCDMA
Appealing compact solution
Bothdevelopingandprovidingdataap-plicationsformobileradiopresentamul-titudeofnewchallenges.Mostapplica-tionsindatacommunicationsarebasedontheInternetprotocol(IP),whichinturnisbasedontheclient-serverprinci-ple.Thismeansthataclientusesamo-bilephonetorequestservicesthatareprovidedbyaserverinthecommunica-tionsnetwork.ThesoftwarefortheseapplicationsisusuallydevelopedonPCs;afteritsimplementationandextensivecomputersimulations,thesoftwareisportedtothemobilephone.Toperformfurthertestsonthemobilephoneitself,apublicmobileradionetworkorthesim-ulationofsuchanetworkisrequired.
Uptonow,radionetworkscouldusu-allybesimulatedonlywiththeaidofcomplexsetups.ThisisremediedbytheR&S®CMU�00,whichisaveryinterest-ingalternativeforsuchtasks.Duetotheextensivepossiblesettingsitoffers,testscanalsobeperformedonfrequen-cybands,forexample,thatarenotnec-essarilypartofanavailablepublicradionetwork.
Beforecommunicationsservicescanbelaunchedonthemarket,networkop-eratorsmustsubjectthemtointerop-erabilityteststoensurethattheyoper-atesmoothly.Withthemultimediames-sageservice(MMS),forexample,thecorrectexchangeofmessageswiththeserverimplementationinthenetworkorbetweenmobilephonesfromdiffer-entmanufacturersischecked.Moreover,makingobjectivecomparisonsunderus-er-definableandrandomlyreproducibleoperatingandtestconditionsisanotherpivotalfunctionthistargetgroupneeds.
Test setup
Applicationtestsetupsbasicallyconsistofamobilephone,theR&S®CMU�00andaPC.Themobileradiotester,whichisconnectedtothemobilephoneviatheradiointerface,simulatesthemobilera-dionetwork.ViaanEthernetconnection,itaccessestheIP-basedcomputerworld,whichcanbeeitheralocalareanetwork(LAN),theInternetor,atitssimplest,acontroller,wheretheserversprovidingthecommunicationsservicescanbeac-cessed.Theuserusuallyaccessestheseservicesfromthemobilephoneviamo-bileoriginatedcalls.TheR&S®CMU�00bridgesthegapbetweenwireddatacommunicationsandradiocommunica-tionsacrossvariousprotocollayers.
Versatile test scenarios
Go/NoGotestsstartanapplicationonthemobilephoneandtesttheoperationfromtheuser‘sviewpoint.ThesetestsdifferfromRFmeasurementsperformedwiththeR&S®CMU�00bycoveringtheentireoperatingsystemofaphoneandsubjectingittotheappropriatestress.
Afteranapplicationpass-esthisbasictest,perfor-mancemeasurementsareusuallycarriedout;theiraimistoanalyzetheachievabledatatransmis-sionratesinthedownlinkandtheuplink.
Anothernoteworthycri-terionthathelpsdeter-minethepracticalvalueofmobilephonesistheiroperatingtimewithre-chargeablebatteries.Tominimizeaphone’spow-erconsumption,youneedtomeasuretheconsump-
The highly successful Universal Radio Communication Tester R&S®CMU200, which was originally designed as a pure RF tester for the various mobile radio stan-dards used around the world, now enables additional user groups to test video tele-
phony and data applications.
¸CMU 200 Applications �
tionwhileanapplicationisactivesothatyoucanfindoutmoreaboutpossi-bleoptimizationprocedures.Ifrequired,themobileradiotestersimultaneous-lyrecordsdetailedinformationabouttheprocessedprotocollayersinalogfile,whichisthenavailableforfutureevalua-tionandanalysis.
Interactiontestsanalyzehowdifferent,simultaneouslyactiveapplicationsonamobilephoneaffecteachother.Thesetestsanalyze,forexample,whatwillhappenifanSMSarriveswhileavideoisbeingdownloadedandthecalendarfunctionisoutputtinganalarm.
Interoperabilitytestscheckwhethermo-bilephonesfunctionsmoothlywithinanetwork,forexamplewheninteractingwiththenetworkoperator’sMMSserv-er,orwhentwophonesfromdifferentmanufacturersinteractwitheachother.Inthesimplestcase,justonephoneisusedintheloop-backmodetoperformacombinedtransmission/receptiontest.
Forthistest,anMMSisgeneratedonthemobilephoneandthensentbacktothesamephoneiftheoriginatingphonenumberisenteredattransmittal.Beforeanewmobilephonereachesthemarket,itmustundergoanumberofteststoen-
surethatiscustomer-ready.IntheEMCtest,forexample,thetelephonemustoperatereliablyinthelabduringsimul-taneoustransmissionandreceptionofdataandremainlargelyunaffectedbystrongelectromagneticfields.
Whenthe¸CMU�00iscombinedwiththeFadingSimulator¸ABFS,theoperationofamobiletelephoneun-dervariousfadingscenariossuchasinanautomobileatvariousspeedsandre-ceptionconditionscanbesimulated.Thus,thereliabilityofdataexchangecanbetestedandevaluated.
TCP/IP services
Theclientsonthemobilephonere-quiresuitableserversatthecontrol-lerendasacounterpartforapplicationtests.TheR&S®CMU-K96WCDMAap-plicationtestingoptionallowsIP-baseddataapplicationstobetestedonamo-bilephone;inaddition,itincludessever-alTCP/IPservers,forexampleanHTTPserver,whichallowsyoutostartawebbrowseronamobilephone.AnotherserveristheMMScenter(MMSC)withbasicfunctionality,whichcanbeusedtotestthetransmissionandreceptionofmultimediamessagesonamobilephone.
Future prospects
Applicationtestsarebecomingmoreandmoreimportantinmobileradio.Rohde&Schwarzismeetingthistrendbycontinuouslydevelopingnewsolu-tionsinthisfield.Thelicensingauthor-itieshaverespondedtochangesinthewaymobilecommunicationsareused:Bydevelopingtestscenarioswithexactspecifications,theydefineappropriatetestsattheapplicationlevelthatwillen-surethatmobileradionetworkswillalsooperatesmoothlyinthefuture.
� ¸CMU 200 Applications
(E)GPRS application tests with the ¸ CMU200
Owingtosignificantprotocolstackex-tensions,the¸CMU�00nowalsoallowsyoutotestapplicationsviaGPRSandEGPRS(EDGE)mobilephonessimplybyactivatinganewsoftwareop-tion.InadditiontotheapplicationtestforCDMA�000®,thisisyetanotherstandardideallysupportedbythe¸CMU�00,provingitsflexible,fu-ture-proofconcept.ThenewsoftwareoptionmakesitpossibletotestalmostanyIP-basedapplicationsinpacket-ori-entedmodeviaanIPgateway.
Versatile application tests in (E)GPRS mobile radio
The software option ¸CMU-K92 allows you to test applications for 2.5G mobile phones. For example, you can now test the transmission or reception of multimedia message services (MMS), Internet brows-ing or video streaming within a simulated (E)GPRS network environment. In addition to measuring the known RF parameters of power, spectrum or modulation, you can now also perform such tasks as displaying
data throughput or analyzing protocols.
Youcansimplytestproperfunction-ing,butalsocheckwhetherdifferentap-plicationsthataresimultaneouslyacti-vatedonamobilephonerunsmoothly.GPRSandEGPRS,theoffshootsoftheGSMstandard,achievedatatrans-missionratesofupto171.�kbit/sand�7�.6kbit/srespectively,thusallowingamultitudeofapplicationstobecarriedout,someofthemevenwithrealtimere-quirements.InadditiontodisplayingthecurrentdatathroughputoftheIPpack-etsexchangedbetweenmobilephoneandserver,theR&S®CMU�00alsore-cordsvarioustransmissionprotocols.Designengineersarethusabletothor-oughlyanalyzenotonlytheIPprotocol,butalsoanumberofotherradio-spe-cificprotocolssuchasradiolinkcontrol(RLC)ormediumaccesscontrol(MAC).Regardlessoftheseactivities,itisstillpossibletomeasureandanalyzetheRFsignalstransmittedbyGPRSorEGPRSmobilephonesontheR&S®CMU�00withrespecttopower,spectrumormod-ulation.Unliketheprevioustransmittertest,themeasurementisnowperformedaspartoftheapplicationdatatransmis-sionandnolongeronthebasisofpseu-
do-randombinarysequences(PRBS).IftwoR&S®CMU�00testersareavailable,theapplicationtestscanbeexpandedtoaccommodatedataend-to-endtests,forexampleforcheckingtheexchangeofanMMSmessagebetweentwomo-bilephones.IfonlyoneR&S®CMU�00isavailable,thetransmissionandslightlydelayedreceptionofanMMSmessagewithonemobilephonecanalsobeim-plementedusingtheloop-backsettingintheMMSC.
Powerful aid in the development lab
ThenewsoftwareoptionR&S®CMU-K9�fortheR&S®CMU�00forthefirsttimeal-lowsapplicationdesignengineerstotesttheirworkinthelabonmobilephonesinasimulatedradionetwork.Inthiscase,themainfocusisonprovingthattheap-plicationrunssmoothlyonthemobilephoneundernormaloperatingandradioconditions.Fortheseapplications,whichcanbedividedintomobile-originatedandmobile-terminatedapplications,thisrep-resentsthefirstrealistictestaftercom-pletionofthesimulationtestsonthede-velopmentcomputer.Whentestingmo-bile-originatedapplications,datacommu-nicationisinitiatedonthemobilephone,
Recording of all exchanged IP data packets with time stamp and display of the data transfer rate achieved.
Throughput of the IP data packets exchanged between mobile phone and server in Uplink (UL) and Downlink (DL)
¸CMU 200 Applications �
forexamplebycallingupanintegratedbrowserwithsubsequentaccesstothedataofawebserverconnectedviatheEthernetinterfaceoftheR&S®CMU�00.Anexampleofatestofamobile-termi-natedapplicationisanSMStransmission,eitherfromacomputerconnectedtothetesterordirectlyfromthetestertothemobilephone.
Future prospects
Option¸CMU-K9�istheplatformforfurtherapplicationtests.ThisoptionisrequiredinordertorunthevalidatedMMStestcasesortotestcomplexap-plicationssuchaspushtotalkovercel-lular(PoC).Intheforthcomingconfigura-tions,dataapplicationscanalsobetest-edwhilevoicetransmissionisinprog-ress.Iffeasiblewiththemobilephone,bothapplications(circuit-switched/pack-et-switched)canthenbeoperatedandtestedsimultaneouslyinthedualtrans-fermode.
A test setup for an end-to-end test between two mobile phones for testing for problem-free MMS exchange be-tween mobile phones from different manufacturers
The ¸CMU 200 can also measure spectra and modulations. Here is an example of a power measurement dur-ing a file transfer with four slots in the uplink and triggering in response to combined GMSK/8PSK modulation.
6 ¸CMU 200 Applications
Settings and measurement results
ToconfiguretheWCDMAradionetworkforapplicationtests,theR&S®CMU�00parametersettingsknownfromtheRFmeasurementscanbeusedanddynam-icallyadjustedduringtesting.Changingthechannelnumberstriggersanintra-cellhandover,forexample.Sinceare-ducedtransmitlevelincreasesthebiter-rorprobabilityatthereceiverend,anapplicationfunctiononamobilephonecanalsobetestedunderadversereceiveconditions.Iftheapplicationtestisper-formedincompressedmode,themobilephoneissubjectedtoadditionalstress,whichallowsyoutocheckthequalityoftheUEreporttransmittedfromthemo-bilephonetothetester.Whileanappli-cationisrunningonthemobilephone,theknowntransmittermeasurements
suchaspower,codedomainpowerandmodulationcanstillbeperformed.Theblockerrorratio(BLER)determinedbytheR&S®CMU�00isusedtoevaluatethereceiverinthemobilephone.
Incombinationwithanadditionalfad-ingsimulatorsuchastheR&S®ABFS,thefunctionofanapplicationcanbesimu-latedatdifferentspeedsinvehiclesandinvaryingenvironments.
Remote control and automation
Toremote-controltheR&S®CMU�00duringapplicationtests,anIEC/IEEEbusinterfaceisavailable;itcanbeused,forexample,toautomaticallyobtainmea-surementresultsandmeasurementvalues–aprerequisiteforprogram-con-trolledsequences.Suchautomaticallyrunningtestscanberepeatedatanytimeandasoftenasnecessarywith-outstaffintervention,thushelpingtoin-creasethesystem’sefficiency.
Protocol analysis
Afterthesoftwarehasbeenport-edtothemobilephone,usersoftenwanttorecordprotocolstooptimizein-ternalprocessesortoperformaner-roranalysisthatmaybenecessary.TheR&S®CMU-Z�6WCDMAmessageana-lyzerandrecorderoptionallowsalluni-versalterrestrialradioaccessnetwork(UTRAN)protocollayerstoberecord-ed,whichcanthenbeusedformorede-tailedanalysis(FIG�).Thispowerfultoolpermitsin-depthanalyses,includingtransportlayeranalyses.
WCDMA: data applications and video telephony test
Option ¸CMU-K96 makes it possible to test data applications on WCDMA mobile
phones
An inner loop power measurement can be used during the application test, for example, to test the accu-racy of a mobile phone‘s amplifi-er when traffic power commands (TPC) are being carried out.
¸CMU 200 Applications 7
Video telephony
Inalllikelihood,videotelephonyisthemostspectacularnewWCDMAappli-cation.Itisuniqueinthatitiscircuit-switched,andnotIP-basedlikethepre-viouslydescribedapplications.TheWCDMAfirmwarechecksthisfunc-tionalitywithoutrequiringoptionalex-tensions.Thetestisperformedinechomode,wherethetransmissionandre-ceptionofvideoandaudiosignalscanbecheckedwithjustonemobilephone.ThevideotelephonysignalstransmittedbythephonetotheR&S®CMU�00areloopedbackfromtheradiotesteranddisplayedbythephoneaswould-bevid-eoandaudiosignalsofacalledstation.
Future prospects
Theapplicationtestisthelatestadd-ontoradiocommunicationstestingandsuretogainincreasingimportanceoverthenextfewyears.Rohde&Schwarzwillcontinuetoenhancethefunction-alscopeoftheR&S®CMU�00’scur-renttestfunctionstomatchmarketre-quirements.Thenextstepstobetak-enincludetheexpansiontohighspeeddownlinkpacketaccess(HSDPA)and,onceauniformworldwidestandardhasbeenspecified,totestcasesforpushtotalkovercellular(PoC).
The ¸CMU-Z46 WCDMA message analyzer and recorder option records all UTRAN protocol layers affected by communications between the ¸CMU 200 and the mobile phone. The top half of the screen shows a list of all recorded protocol layers. The individual layers can be selected and their contents analyzed in detail (bottom half of screen).
� ¸CMU 200 Applications
Extensive test capabilities
TheCDMA�000®1xmobileradiostan-dard,whichwasdevelopedbythe�GPP�standardizationbody,isofficiallyrecog-nizedbytheITUasanIMT-�000stan-dardforthethirdmobileradiogeneration(�G).Revision0(orA),whichisnowincommercialuse,allowsdataratesofupto�07.�kbit/sina1.��MHzfrequencychannel.Oncefurtheroptimizationstag-eshavebeencompleted,RevisionA(al-soknownas1xEV-DO)willallowamax-imumdatarateof�.1Mbit/sinthefor-wardlink(basestationtomobilestation)and1.�Mbit/sinthereverselink(mobilestationtobasestation).
In�Gnetworks,datalinksbasedontheInternetprotocolareplayingamoreandmoresignificantrole.ThiscallsfornewtestproceduresdesignedtoverifythefunctionalityofIP-basedlinks.Forexam-ple,theTIA/EIAstandardTIA-�9�spec-ifiesdataratemeasurementsforFTPlinks.
Service Option 33InitsServiceOption��,theTIA/EIAstandardIS-707-A-1specifiesIP-baseddatalinksfortheCDMA�000®stan-dard.TheR&S®CMU�00providesallpa-rametersrequiredforthisserviceop-tion,rangingfromtrafficchannelconfig-uration(dataratesofupto1��.6kbit/scanbesetforthesupplementalchannel(SCH)bothfortheforwardandthere-verselink)throughtotheparametersformobileIPandauthentication.
PPP authenticationForsettingupapoint-to-pointproto-col(PPP)link,theR&S®CMU�00canbeconfiguredtorequestPPPauthen-ticationfromthemobilephone.TheR&S®CMU�00supportstwomethodsof
authentication:CHAP(challengehand-shakeauthenticationprotocol)andPAP(passwordauthenticationprotocol).Onreceivingtheauthenticationrequest,themobilephonereturnstheusernameandthepasswordenteredforthelinksetup.Thetestercheckswhethertheus-ernameandpasswordarevalid.FortheCHAPprotocol,periodicallyrepeatingauthenticationcanbeconfigured.FormobileIPlinks,themobileIPstandardstipulatesthatauthenticationbedeac-tivated.
Mobile IPMobileIPisanadditiontotheconven-tionalInternetprotocol.Itmakesthemovementsofamobilecomputer(mo-bilenode,i.e.inthiscaseamobilephone)transparentfordataapplicationsandthehigherprotocollayers.
AmobileIPenvironmentinvolvestwonewnetworkelements–thehomeagentandtheforeignagent.Thehomeagentislocatedinthemobilephone‘shomenetwork;itknowsthemobilephone‘scurrentlocationand“tunnels”datapacketsdirectedtothemobilephone‘shomeaddresstothemobilephone‘scurrentlocation.Theforeignagentassignsthemobilephoneatem-poraryaddress(foreignagentcare-ofad-dress)intheforeignnetworkandfunc-tionsastheterminalpointofthetunneldepartingfromthehomeagent.
TheIPaddressesforthemobilephone‘sforeignagentandhomeagentcanbedefinedontheR&S®CMU�00,thusal-lowingdatapacketstobeexchangedbetweentheforeignagentandthemo-bilephone.
Testing CDMA2000® data applications
Standard CDMA2000® mobile radio net-works have already been in commercial use since 2000 in many Asian countries (e.g. Japan and South Korea), the Americas (e.g. the USA and Canada), as well as in Eastern Europe. With the options ¸CMU-B87 and ¸CMU-K87 the R&S ® CMU200 now offers extensive test capabilities for data applications for this important global
3G standard.
Statistical evaluation of data transfer between the ¸CMU 200 and the mobile phone during the application test. After the RLP (Radio Link Protocol Type 3) and IP data packets are exchanged, the transmitted and received packets are evaluated using different criteria.
CDMA�000®isaregisteredtrademarkoftheTelecommu-nicationsIndustryAssociation(TIA-USA).
Cableconnections
Homenetwork
Web server,mail server, etc
R&S®CMU200(base station)
Mobile node(mobile station)
Foreignnetwork
Foreign agent
Home agent
Virtual access point
of mobile node
Data from/to mobile station
InternetIP tunnel
¸CMU 200 Applications 9
PPP link statusDuringperiodsinwhichthemobilephoneisnottransmittingorreceiv-ingdata,itswitchestoanidlestatereferredtoasdormantmode.Inthismode,thePPPlinkismaintained,butnotrafficchannelconnectionsaresetupintheCDMA�000®network.TheR&S®CMU�00indicatesthevariousPPPstatesthemobilephonecanassume:
Registered mobilephoneisregistered,noPPPlinkisestablished
PPP Connected PPPlinkisestab-lished,trafficchannelconnectionsaresetup,mobilephonetransmits/receivesdata
PPP Dormant PPPlinkisestablished,notrafficchannelconnectionsaresetup,mobilephonedoesnottransmit/re-ceivedata
TX/RX RLP frame and IP packet statisticsAstatisticalevaluationbasedoncountsofthedifferentparametersmakesitpos-sibletotrackthedataflowthroughthebasestation,i.e.theR&S®CMU�00.Thefollowingtypesofdataarecountedsep-aratelyfortheTXandRXdirections:
RLPframesThedifferentRLPframetypes(IDLE,FILL,ACK,etc)TotalPPPbytesTotalPPPpacketsTotalTX/RXdatarate
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Application scenarios
TheR&S®CMU�00allowsdifferenttestsetupstobeimplementedfordifferentapplicationscenarios.Inthesimplestcase,youcanoperatethetesterinthestandalonemodetoperformdataratemeasurementsonthemobilephoneun-dertest.
Typical test setup for mobile IP link with mobile station and reference to home agent and foreign agent.
10 ¸CMU 200 Applications
MMS – a new challenge in mobile radio networks
GPRS,EGPRSandUMTSarepowerfulcommunicationsanddatatransmissionnetworksofferingattractiveapplicationssuchasthetransmissionofpictures,vid-eoclipsormusicfilestooneormoresubscriberssimultaneously.Forthispur-pose,amobilephoneusesthemulti-mediamessageservice(MMS),whichtransmitsacombinationoftextandmultimediafiles.
Networkoperatorsmustensuresmoothmultimediafileexchange.However,asaprerequisiteforanefficientnetwork,allmobilephoneshavetomeetspecif-icminimumrequirementsforhandlingthefileformatsused.Forexample,be-causedisplaysizesdiffer,allmobilephonesmustbeabletodisplayandre-playthepicturesandvideoclipstrans-mittedinvarioussizesandfileformatsinsuitablequalitywithouthavingtoreverttoconversionaidsforthedifferenttypesofmobilephonesthatnetworkopera-torsprovideinthenetwork.Otherwise,forexample,apicturesentinGIFformattoamobilephonethatcanonlyprocessJPEGformatwouldhavetobeconvertedinthenetwork.Inviewofthemultitudeofdisparatemobilephonesandfilefor-mats,thistaskwouldbevirtuallyimpos-sibletohandle.
Minimum standard with new test cases
Tocircumventsuchproblems,amin-imumstandardfortransmittingmulti-mediafileshasbeendefined.Onbe-halfoftheGlobalCertificationForum(GCF),theOpenMobileAlliance(OMA)specifiedtestcasesbymeansofwhichitispossibletoverifywhethermobilephonescomplywiththisminimumstan-dardwhenreproducingmultimediacon-tent.Someofthesetestcasesweread-optedbytheGCFandthePCSTypeCertificationReviewBoard(PTCRB)andhavethusbecomepartofthecertifica-tionforallmobilephonessupportingMMS.Unlikesignalingtestcases,thesetestcasesverifyapplicationlayersin-steadoflowerprotocollayers.
Forreceptiontests,OMAprovidesref-erencesthatalsoincludepicture,videoandsoundfilesindifferentformatsandsizes.Fortestpurposes,amultimediamessageissenttothemobilephone;vi-sualoracousticcomparisondetermineswhetherthedisplayon,orreplayby,themobilephonecomplieswiththerefer-encecontent.Tofacilitatecomparingtheresultsonthemobilephonewiththeref-erencecontent,thereferencecontentisdisplayedontheR&S®CRTUscreenafterthemessagehasbeensent.
Unlikereceptiontests,transmissiontestscanbeevaluatedautomatically.Forthispurpose,themobilephonesendsames-sagewithmultimediacontenttothepro-tocoltester.Usingaparser,theproto-coltestersplitsthecontentintoseparatemediafilesandtheSMILspecification,checkswhethertheycomplywiththereferenceandthenindicateswhetherthemobilephonehaspassedthetest.Amanualfilecomparisonusingaviewer,i.e.asuppliedprogramthatcandisplaypicturesandvideosandreplaymusicfiles,isofcoursealsopossible.
Fit for the future with solutions from Rohde & Schwarz
TheR&S®CRTU-ATEapplicationtestenvironmentsoftwareplatformfromRohde&SchwarzisaflexibleMMStestsolution.The¸CRTU-ATEsoftwareplatformcontainsallcomponentsre-quiredforMMStests.Itismodularindesignsothatitcanbeexpandedtomeetfuturerequirements.Thesuppliedtestcasesonlyincludetestsattheappli-cationlevelandareindependentofthemobileradiostandard.
MMS tests on (E)GPRS and WCDMA multimedia mobile phones with the ¸CMU 200 and ¸CRTU
With the R&S ® CRTU-ATE application test environment software platform Rohde & Schwarz has expanded its portfo-lio by an MMS test solution for developing, verifying and certifying multimedia mobile
phones.
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¸CMU 200 Applications 11
ThecoreoftheMMScenterconsistsofaparserandaviewer.Theparsersplitsthemultimediamessageintoseparatecontents;comparingthemwiththeref-erencecontentindicateswhetheramo-bilephonefunctionscorrectly.Thesup-pliedviewercandisplaypicturesorvid-eosandhelpfindoutwhyadisplayisnotcorrect.
Summary
WithitsR&S®CRTU-ATEMMStestsolu-tion,Rohde&Schwarzhasexpandeditsportfoliobyakeycomponentfordevel-oping,verifyingandcertifyingmultime-diamobilephones.ThenextstepwillbetoprovidetestsolutionsforPoCandtheInstantMessagingandPresenceService(IMPS).
Certified Quality System
ISO 9001DQS REG. NO 1954 QM
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Moreinformationatwww.rohde-schwarz.com(searchterm:CMU�00)
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www.rohde-schwarz.comEurope:+�91�0�1�����,[email protected]
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