Sökning: "HSDPA"

Visar resultat 6 - 10 av 14 uppsatser innehållade ordet HSDPA.

  1. 6. Scheduling Algorithms and QoS in HSDPA

    Master-uppsats, Blekinge Tekniska Högskola/Sektionen för ingenjörsvetenskap

    Författare :Javed Iqbal; Basit Mustafa; [2009]
    Nyckelord :HSDPA; QoS; Scheduling Algorithms;

    Sammanfattning : High Speed Downlink Packet Access (HSDPA) is the extension to the Universal Mobile Telecommunication System (UMTS). HSDPA allows for higher data rates due to new adaptive Modulation and Coding (AMC) techniques, Hybrid Automatic Repeat reQuest (H-ARQ) and fast scheduling algorithm. LÄS MER

  3. 7. Rate Scheduling for HSDPA in UMTS

    Master-uppsats, Datateknik

    Författare :Farhan Hameed; [2008]
    Nyckelord :HSDPA; packet scheduler; performance;

    Sammanfattning : The introduction of a new technology High Speed Downlink Packet Access (HSDPA) in the Release 5 of the 3GPP specifications raises the question about its performance capabilities. HSDPA is a promising technology which gives theoretical rates up to 14.4 Mbits. LÄS MER

  4. 8. Performance Evaluation of TCP Variants over UMTS Networks

    Master-uppsats, Institutionen för informationsteknologi

    Författare :Nikunj Modi; [2008]
    Nyckelord :;

    Sammanfattning : With the evolution of 3G technologies like Universal Mobile TelecommunicationSystem (UMTS), the usage of TCP has become more popular for a reliable end-to-end (e2e) data delivery. However, TCP was initially designed for wired networks and therefore it suffers performance degradation due to the radio signal getting affected by fading, shadowing and interference. LÄS MER

  5. 9. Implementation and simulation of HSDPA functionality with ns-2

    Uppsats för yrkesexamina på grundnivå, Institutionen för systemteknik

    Författare :Haichuan Jianqiu Wu Zhao; [2005]
    Nyckelord :Reglerteknik; UMTS; HSDPA; ns-2; EURANE; HS-DSCH; DCH; Power Consumption; FCDS; Reglerteknik;

    Sammanfattning : Enhanced packet-data access is a trend in third generation mobile communication system. WCDMA Release 5 introduces HSDPA (High Speed Packet Data Access) with a brand new downlink transport channel HS-DSCH (High Speed Downlink Shared Channel) into 3GPP specification to provide greater capacity. LÄS MER

  7. 10. Packet Data Flow Control in Evolved WCDMA Networks

    Uppsats för yrkesexamina på grundnivå, Institutionen för systemteknik

    Författare :Andreas Bergström; [2005]
    Nyckelord :Flow Control; Buffer Management; HSDPA; WCDMA; UMTS; 3G;

    Sammanfattning : The key idea of the new, shared high-capacity channel HSDPA, is to adapt the transmission rate to fast variations in the current radio conditions, thus enabling download peak data rates much higher than what WCDMA can offer today. This has induced a need for data that traverses the mobile network to be intermediately buffered in the Radio Base Station, RBS. LÄS MER