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    README
    4G Simulator for OMNEST/OMNeT++ 4.2
    ====================================
    
    4Gsim is an open-source 4G simulation package, written for OMNEST/OMNeT++ 
    simulation system and developed over INET framework.
    
    Directors for 4Gsim:
    
     src/
       applications/            application protocols
         diameter/              diameter base protocol
         diameters6a/           diameter application for s6a interface
         s1ap/                  s1ap protocol
         nas/                   nas protocol
       networklayer/            L3 (network layer) protocols
         gtp/                   gtp protocol main
           path/                gtp path
           tunnel/              gtp tunnel
       util/                    general utility classes
         asn/                   utility classes for ASN.1 encoding/decoding
         gateway/               classes for 4Gsim gateways
         headerserializers/     serialize/parse methods for INET and 4G protocols
         subscriber/            classes for subscriber, PDN connection and Bearer context
         
     
    
    INET Framework for OMNEST/OMNeT++ 4.2
    =====================================
    
    The INET framework is an open-source communication networks simulation
    package, written for the OMNEST/OMNeT++ simulation system. The INET framework
    contains models for several Internet protocols: beyond TCP and IP there is UDP,
    Ethernet, PPP and MPLS with LDP and RSVP-TE signalling. See the CREDITS file
    for the names of people who have contributed to the INET Framework.
    
    IMPORTANT: The INET Framework is continuously being improved: new parts
    are added, bugs are corrected, and so on. We cannot assert that any protocol
    implemented here will work fully according to the specifications. YOU ARE
    RESPONSIBLE YOURSELF TO MAKE SURE THAT THE MODELS YOU USE IN YOUR SIMULATIONS
    WORK CORRECTLY, AND YOU'RE GETTING VALID RESULTS.
    
    Contributions are highly welcome. You can make a difference!
    
    See the WHATSNEW file for recent changes.
    
    
    GETTING STARTED
    ---------------
    You may start by downloading and installing the INET framework. Read the INSTALL
    file for further information.
    
    Then you can gather initial experience by following the INET tutorial. After
    that, you can learn the NED language from the OMNeT++ manual & sample
    simulations.
    
    After that, you may write your own topologies using the NED language. You may
    assign some of the submodule parameters in NED files. You may leave some of
    them unassigned.
    
    Then, you may assign unassigned module parameters in omnetpp.ini of your
    simulation. (You can refer to sample simulations & manual for the content of
    omnetpp.ini)
    
    Finally, you will be ready to run your simulation. As you see, you may use
    the INET framework without writing any C++ code, as long as you use the
    available modules.
    
    To implement new protocols or modify existing ones, you'll need to add your 
    code somewhere under the src directory. If you add new files under the 'src' 
    directory you will need to regenerate the makefiles (using the 'make makefiles' 
    command).
    
    If you want to use external interfaces in INET, please install libpcap-dev (on linux)
    or winpcap (on windows from www.winpcap.org), then re-run the omnetpp configuration
    script (./configure). You should also enable the pcap support by editing the
    src/makefrag and then regenerating the INET makefiles (using the "make makefiles" 
    command).
    
    Directory structure
    -------------------
    Directories of INET framework source are arranged roughly along the OSI layers.
    
    Bottom-up:
    
     3rdparty/               optional 3rd party components like (Network Simulation Cradle etc.)
    
     doc/                    documentation
    
     examples/               example networks for various protocols
    
     src/
       applications/         application layer
         dhcp/               DHCP protocol (maintainer: JCM, origin: https://github.com/jmaureir/DHCP)
         ethernet/           traffic generators (directly for Ethernet)
         generic/            traffic generators (directly for IP)
         httptools/          HTTP traffic generator (maintainer: KVJ, origin: http://omnet-httptools.googlecode.com/svn/trunk/omnet-httptools-read-only)
         pingapp/            ping application
         rtpapp/             RTP (real-time Transport Protocol) application
         sctpapp/            SCTP applications (maintainer: TD)
         tcpapp/             TCP application models
         udpapp/             UDP application models (VideoStream, etc.)
         voiptool/           VoIP applications (maintainer ZB, origin: http://www.tkn.tu-berlin.de/research/omnetVoipTool)
    
       base/                 common header files, base classes
    
       battery/              Battery model (maintainer AAQ, origin: mixim + INETMANET)
    
       linklayer/            L2 (data link layer) protocols
         contract/           API to common L2 functionality
         ethernet/           Ethernet model (MAC, LLC, Encap, Switch)
         ext/                External interface (allowing the simulation to work with real hardware)
         ieee80211/          ieee 802.11 interface (maintainer: AAQ origin: https://github.com/aarizaq/inetmanet-2.0)
         ppp/                basic PPP model (framing only)
         radio/              common radio infrastructure, propagation models etc.
         queue/              generic queueing framework (maintainer TB)
    
       mobility/             Node mobility models (origin: mobility framework + mixim + inetmanet)
    
       networklayer/         L3 (network layer) protocols
         arp/                ARP protocol
         autorouting/        autoconfiguration of static routes
         bgpv4/              BGP V4 protocol (see BGPv4 feature) //TODO
         common/             InterfaceTable, InterfaceEntry modules //TODO
         contract/           API to common L3 functionality
         icmpv6/             ICMPv6 implementation 
         ipv4/               IPv4 and associated protocols
         ipv6/               IPv6 implementation 
         ipv6tunneling/      IPv6 tunneling support
         ldp/                LDP signalling protocol for MPLS (maintainer: VJ)
         manetrouting/       Mobile AdHoc Routing protocols (maintainer: AAQ origin: inetmanet)
         mpls/               MPLS implementation (maintainer: VJ)
         ospfv2/             OSPF protocol (maintainer: ???)
         rsvp_te/            RSVP-TE signalling protocol for MPLS (maintainer: VJ)
         ted/                Traffic Engineering Database (maintainer: VJ)
         xmipv6/             mobile IPv6 protocol (maintainer: FZY)
    
       nodes/                protocol stacks, host and router models
         bgp/                IPv4 router with BGP and OSPF support
         ethernet/           nodes allowing direct ethernet communication
         httptools/          HTTP traffic generator (maintainer: KVJ, origin: http://omnet-httptools.googlecode.com/svn/trunk/omnet-httptools-read-only)
         inet/               IP-based components
         ipv6/               IPv6-based components
         mf80211/            host for mf80211
         mpls/               router models with MPLS/LDP/RSVP-TE
         ospfv2/             an OSPFv2 router node
         wireless/           nodes for wireless simulations
         xmipv6/             mobile IPv6 nodes (maintainer: FZY)
    
       transport/            transport layer protocols
         contract/           API to transport layer functionality
         rtp/                Realtime Transport Protocol (see AUTHORS file in directory)
         sctp/               Stream Control Transmission Protocol (maintainer: TD)
         tcp_common/         Common generic part of the different TCP implementations
         tcp/                TCP protocol (supporting SACK) (default TCP implementation)
         tcp_nsc/            TCP protocol using Network Simulation Cradle
         tcp_lwip/           TCP protocol using Lightweight IP library
         udp/                UDP protocol
    
       util/                 various utility classes
    
       world/                various modules that are used at network level (i.e. global modules)
         annotations/        allows drawing some additional shapes on the Tkenv canvas (maintainer: CS)
         httptools/          global components for HTTP traffic generation (maintainer: KVJ, origin: http://omnet-httptools.googlecode.com/svn/trunk/omnet-httptools-read-only)
         obstacles/          obstacle models that block the radio transmission (maintainer: CS)
         powercontrol/       enable/disable power control aware modules (maintainer: JCM)
         radio/              global modules for radio models - radio channel access 
         scenario/           create sim scenarios, change parameters over time
         traci/              allows connecting to a TraCI server (maintainer: CS, origin:http://veins.car2x.org)
    
     tests/                  automatic tests for the INEt framework
    
    
    Maintainers / authors:
      TD  - "Thomas Dreibholz" <dreibh@iem.uni-due.de>
      ZB  - "Zoltan Bojthe" 
      JCM - "Juan-Carlos Maureira" <jmaureir@gmail.com>
      AAQ - "Alfonso Ariza Quintana" <aarizaq_m@hotmail.com>
      KVJ - Kristjan V. Jonsson (LDSS) <kristjanvj@gmail.com>
      TB  - Tamas Borbaly <tamas.borbely@omnest.com>
      LM  - Levente Maszaros <levente.meszaros@omnest.com>
      FZY - Faqir Zarrar Yousaf
      VJ  - Vojtech Janota
      CS  - Christoph Sommer <christoph.sommer@informatik.uni-erlangen.de>
    
    xMIPv6 additions for INET Framework
    =======================================
    further info: http://www.kn.e-technik.tu-dortmund.de/content/view/232/lang,de/
    
    
    VoIPTool 2.0
    ============
    
    This is the OMNeT++ 4.x port and complete rewrite (by Zoltan Bojthe)
    of the TKN VoIPTool, http://www.tkn.tu-berlin.de/research/omnetVoipTool/
    
    The fraction of voice over Internet Protocol (VoIP) based telephone calls
    among the totality of voice based communication acts has been significantly
    growing during the last years. In wired as well as wireless communication
    applications, VoIP is expected to completely replace former circuit
    switched telephony. This project provides an OMNeT++-based VoIP traffic
    generator that creates realistic VoIP packet streams, due to the
    utilization of real audio data and an existing VoIP standard codec.
    Moreover, by applying ITU-T's perceptual evaluation of speech quality
    (PESQ) approach at the sink, the perceived quality of a transmitted VoIP
    stream can be determined.
    
    This library is an add-on to the INET Framework, http://inet.omnetpp.org.
    It provides two modules: VoIPSourceApp and VoIPSinkApp. Both are
    application- layer modules that operate over UDP, and can be used in INET's
    StandardHost very much like other UDP traffic generators and sinks (see the
    udpApp[] submodule vector, numUdpApps parameter, etc. in StandardHost.)
    
    VoIPSourceApp accepts an audio file and a destination IP address/port as
    input, and will transmit the file's contents as voice traffic over UDP n
    times (by default once). For transmission, the audio is resampled at the
    given frequency (by default 8KHz) and depth (by default 16 bits), and
    encoded with the given codec (by default G.726) at the given bit rate (by
    default 40Kbps), and chopped into packets that each carry dt milliseconds
    of voice (by default 20ms). (The above default values may be out of date;
    actual values come from the NED file).  Packets that are all silence (all
    samples are below a given threshold in absolute value) are transmitted as
    special "silence" packets. The module does not simulate any particular VoIP
    protocol (e.g. RTP), but instead accepts a "header size" parameter that
    can be set accordingly.
    
    VoIPSinkApp listens on an UDP port, and expects to receive VoIP packets on
    it. The received voice is then saved into a result audio file that can be
    compared with the original for further evaluation. VoIP packets are
    numbered, and out-of-order packets are discarded (the corresponding voice
    interval will be recorded as silence into the file). VoIP packets that miss
    their deadlines will similarly be discarded. It is assumed that the audio is
    played back with delay (by default 20ms), which allows some jitter for the
    incoming packets. The resulting audio file is closed when the simulation
    completes (i.e. in the OMNeT++ finish() function).
    
    Related publication:
    
    M. Bohge and M. Renwanz, "A realistic VoIP traffic generation and evaluation
    tool for OMNeT++", 1st International OMNeT++ Workshop, March 2008, Marseille,
    France.
    
    
    ---
    Andras

    项目简介

    4G Simulator

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