Sökning: "ns-2"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet ns-2.

  1. 1. Stochastic Modeling and Simulation of the TCP protocol

    Författare :Jörgen Olsén; Ingemar Kaj; Joachim Charzinski; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical statistics; TCP; flow-control; network simulator; ns-2; stochastic modeling; throughput; packet loss rate; fixed-point method; Matematisk statistik; Mathematical statistics; Matematisk statistik;

    Sammanfattning : The success of the current Internet relies to a large extent on a cooperation between the users and the network. The network signals its current state to the users by marking or dropping packets. The users then strive to maximize the sending rate without causing network congestion. LÄS MER

  3. 2. Tools and methods for evaluation of overlay networks

    Författare :Olof Rensfelt; Lars-Åke Larzon; Per Gunningberg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Datavetenskap med inriktning mot datorkommunikation; Computer Science with specialization in Computer Communication;

    Sammanfattning : Overlay networks is a popular method to deploy new functionality which does not currently exist in the Internet. Such networks often use the peer-to-peer principle where users are both servers as well as clients at the same time. We evaluate how overlay networks performs in a mix of strong and weak peers. LÄS MER

  4. 3. Modelling of molybdopterin-dependent enzymes

    Författare :Anders Thapper; Kemiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Inorganic chemistry; enzymes; transition state; intermediate; mechanism; molybdopterin; density functional theory; model systems; oxygen atom transfer; molybdenum; tungsten; Oorganisk kemi; Chemistry; Kemi;

    Sammanfattning : The thesis deals with models for molybdopterin-dependent enzymes. Several model systems containing molybdenum or tungsten have been prepared and characterised, and their reactivity with oxygen atom acceptors and donors have been investigated. LÄS MER

  5. 4. Network state estimation in wireless multi-hop networks

    Författare :Anna Chaltseva; Olov Schelén; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dependable Communication and Computation Systems; Kommunikations- och beräkningssystem;

    Sammanfattning : Multi-hop wireless networks in general and those built upon IEEE 802.11 standard in particular are known for their highly dynamic and unstable performance. The commonly accepted way for improving the situation is to jointly optimize the performance of protocols across different communications layers. LÄS MER

  7. 5. Challenged Networking : An Experimental Study of new Protocols and Architectures

    Författare :Erik Nordström; Per Gunningberg; Brian Levine; Uppsala universitet; []
    Nyckelord :Challenged networking; Network Architecture; Wireless Ad hoc Networks; Delay Tolerant Networks; Opportunistic Networks; Testbeds.;

    Sammanfattning : With the growth of Internet, the underlying protocols are increasingly challenged by new technologies and applications. The original Internet protocols were, however, not designed for wireless communication, mobility, long disconnection times, and varying bandwidths. LÄS MER