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Saumattoman liikkuvuuden yllapitamiseksi radioresurssien hallinnan algoritmit ovattarkeassa roolissa verkon hallinnassa. Yhdessa paasyvalvonnan, kuormavalvonnan,pakettiskedulerin, resurssimanagerin ja tehovalvonnan kanssakanavanvaihtoalgoritmit vastaavat laadukkaan, katkeamattoman yhteydenyllapidosta. Nama algoritmit on toteutettu radioverkko-ohjaimen (RNC)ohjelmistossa.Ohjelmiston elinkaaren aikana ohjelmiston eri osissa kohdataan erilaisia haasteita.Ohjelmiston lisaksi ongelmia voi loytya myos radioverkon suunnittelusta,verkkolaitteistosta tai paatelaitteista. Kaikkien naiden ongelmien analysointiinvaaditaan kokeneita R&D-insinooreja, eika ongelmien varsinaisen aiheuttajanloytaminen usein ole yksinkertaista. Taman takia erilaiset vianetsintatyokalut ovatohjelmistokehityksessa ensisijaisen tarkeita. Tama diplomityo analysoi jo kaytossaolevia vianetsintamenetelmia NSN-WCDMA-Control Plane-Handover Algorithm -ryhmassa seka esittaa erilaisia paranneltuja ratkaisuja naihin menetelmiin.Taman diplomityon tuloksena muutamia paranneltuja ratkaisuja toteutettiin jamuutamia muita ratkaisumalleja analysoitiin. Vianetsintatyokalujen seka -menetelmien kehitys jatkuu tarkastellussa ohjelmistokehitysryhmassa myos tamandiplomityon valmistumisen jalkeen.AvainsanatWCDMA, radio network controller, handoverivAALTO UNIVERSITESI YUKSEK LISANS TEZI OZETIElektrik Muhendisligi FakultesiHaberlesme ve Ag Iletisimi BolumuYazarSerkan KangalTarih30.09.2011Sayfa88Tez Basl?g?Genis Bant Kod Bolmeli Coklu Erisim (WCDMA) Mobilite Sorun GidermeCal?smalar? ve IyilestirmeleriDerecesiHaberlesme Muhendisligi YuksekLisans Program?BolumuHaberlesme ve Ag Iletisimi BolumuDenetciProf. Jyri HamalainenOkutmanJukka Valtanen, M.Sc. (Eng)OzetHareketlilik, genis bant kod bolmeli coklu erisim (WCDMA) teknolojisindeki en onemlibasar? alan?d?r. Kesintisiz hareketliligi korumak icin, Radyo Kaynaklar? Yonetimalgoritmalar? ag yonetiminde cok onemlidir. Erisim Kontrol, Yuk Kontrol, PaketZamanlay?c?s?, Kaynak Yoneticisi ve Guc Kontrol algoritmalar? ile birlikte, HucrelerAras? Gecis Kontrol algoritmalar?, yuksek kaliteli kesintisiz bir iletisimdem sorumludur.Bu algoritmalar Radyo Sebeke Kontrolor yaz?l?m?nda yer al?r.Yaz?l?m gelistirme surecinde, farkl? yaz?l?m program bloklari aras?nda s?k?nt?lar olabilir.Yaz?l?msal sorunlar d?s?nda, radyo sebeke planlama sorunlar?, donan?m sorunlar? vekullan?c? ekipman?yla ilgili sorunlar olabilir. Bu sorunlar?n deneyimli Ar-Gemuhendisleri taraf?ndan analiz edilmesi gerekir. Genellikle kok nedenin ne oldugunuarast?rip ortaya c?karmak kolay degildir. Bu nedenle sorun takip ve giderme araclar?,yaz?l?m gelistirmede hayati bir rol oynar. Bu tez, Nokia Siemens Networks sirketiWCDMA Yaz?l?m? - Kontrol Platformu - Hucreler Aras? Gecis Kontrol Algoritmalar?tak?m?ndaki mevcut sorun takip ve giderme cozumlerini analiz etmekte ve bu ihtiyaclaricin gelistirilmis cozumler onermektedir.Bu tezin bir sonucu olarak, baz? gelismis cozumler uygulanmakta ve diger cozumler icinanalizler saglanmaktad?r. Sorun giderme araclar? ve metodolojisinin gelistirilmesi, butezin tamamlanmas?ndan sonra, yaz?l?m gelistirme ekibinde devam edecektir.


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