武汉理工大学毕业论文（设计）
6 总结与展望
6.1 全文工作总结
在本次设计中,通过修改ns-2.33实现了多信道多接口功能，首先我修改了ns-lib.tcl和ns-mobilenode.tcl这两个文件来修改节点的结构和功能，然后相应的修改了mobilenode.[cc,h]，channel.cc和mac-802_11.cc，接着为了使路由协议能够适应多信道多接口，我以AODV为例做了相应的修改，其中，主要部分就是AODV的路由发现与路由维护对应的修改。最后我通过编写两个脚本来比较修改后和之前的吞吐量与丢包率，结果很好的表明的采用多信道多接口技术的有效性，达到了预期的目标。
6.2 展望
关于多信道多接口的扩展还有更灵活的方法，比方说采用接口转换策略，这在另一篇文章“Implementation of a Multi-Channel Multi-Interface Ad-Hoc Wireless Network”中有详细的论述，作为下一步的研究目标。另外，AODV协议在实现多信道多接口这一技术上有其局限性，最好的路由协议是MCR，但如果采用MCR底层的修改工作量将会非常巨大，这也是我们未来工作的重点之一。，再者，进一步可以研究多信道对于网络能量损耗的影响, 以进一步提高这些路由协议和策略的实际应用价值。
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武汉理工大学毕业论文（设计）
参考文献
[1] The Enhanced Network Simulator.http://www.cse.iitk.ac.in/user/barman/tens. [2] Tzi cker Chiueh,Ashish Raniwala,Rupa Krishnan,and Kartik Gopalan.Hyacinth: An IEEE 802.11-based Multi-channel Wireless Mesh Network.http://www.ecsl.cs. sunysb.edu/multichannel,October 2005
[3] The University of Southern Californiaps Information Sciences Institute ( ISI). NSNAM[ EB /OL ]. http: / /nsnam. isi. edu /nsnam /index. php /Main_Page, 2006 -11. [4] Ramon Agiiero Calvo.Adding Multiple Interface Support in NS-2.2007
[5] R. A. Calvo and J. P. Campo, “Adding Multiple Interface Support in NS-2,” [User Guide],University of Cantabria, Jan. 2007.
[6] Xi J, Bettsteter C. WirelessMultihop InternetAccess: GatewayDiscovery Routing and
Addressing[C].Proceedings
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Gener-ationWireless and Beyond (3Gwirelessp02). San Francisco. 2002: 1156 - 1167. [7] C. Perkins, et. al., “Ad hoc On-Demand Distance Vector (AODV) Routing,” RFC 3561,Network Working Group, The Internet Society, Jul. 2003.
[8] Hamidian A. A Study of Internet Connectivity forMobile Ad Hoc Networks in NS2 [D ]. Sweden: Lund Institute of Technology,2003.
[9] P. Bahl, R. Chandra, and J. Dunagan, “SSCH: Slotted Seeded Channel Hopping for Capacity Improvement in IEEE 802.11 Ad-Hoc Wireless Networks,” ACM Annual International Conference on Mobile Computing and Networking (MobiCom) 2004, Philadelphia, PA, pp.216-230, Oct. 2004.
[10] R. Draves, J. Padhye, and B. Zill, “Routing in Multi- Radio, Multi-Hop Wireless Mesh Networks,” ACM Annual International Conference on Mobile Computing and Networking(MobiCom) 2004, Philadelphia, PA, pp. 114-128, Oct. 2004.
[11] 梁海华,徐向阳,徐晓静.自适应无线网络网关接入协议性能分析[J]. 计算工程与设计, 2007, 28 (8) : 1837 - 1840.
[12]王金龙, 王呈贵, 吴启晖, 等. Ad Hoc移动无线网络[M ]. 北京: 国防工业出版社, 2004.
[13] 方路平，NS-2网络模拟基础与应用.北京:国防工业出版社，2008 [14] 张勇，郭达.无线网状网原理与技术.电子工业出版社，2007
[15] 王凡，王甲琛.Ad Hoc网络中的多信道多接口技术研究.电子科技，2008 [16] 于斌，孙斌，温暖等.NS2与网络模拟.北京:人民邮电出版社，2007
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武汉理工大学毕业论文（设计）
附录
[t1,t2].tcl
--------------------------------------------------------------------- set val(chan) Channel/WirelessChannel ;# channel type
set val(prop) Propagation/TwoRayGround ;# radio-propagation model set val(netif) Phy/WirelessPhy ;# network interface type set val(mac) Mac/802_11 set val(ifq) Queue/DropTail/PriQueue set val(ll) LL set val(ant) Antenna/OmniAntenna set val(ifqlen) 50 set val(nn) 4 set val(ni) 4 set val(rp) AODV set val(x) 1000 set val(y) 500
set ns_ [new Simulator]
set tracefd [open t1.tr w] $ns_ trace-all $tracefd set namtrace [open t1.nam w]
$ns_ namtrace-all-wireless $namtrace $val(x) $val(y)
set topo [new Topography] $topo load_flatgrid $val(x) $val(y)
God set god_ [create-god [expr $val(nn)*$val(ni)]] for {set i 0} {$i< $val(ni) } {incr i} { set chan_($i) [new $val(chan)] }
$ns_ node-config -adhocRouting $val(rp) \\ -llType $val(ll) \\
-macType $val(mac) \\
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;# MAC type ;# interface queue type ;# link layer type ;# antenna model ;# max packet in ifq ;# number of mobilenodes ;#max number of interfaces ;# routing protocol 武汉理工大学毕业论文（设计）
-ifqType $val(ifq) \\ -ifqLen $val(ifqlen) \\ -antType $val(ant) \\ -propType $val(prop) \\ -phyType $val(netif) \\ -channel $chan_(0) \\ -topoInstance $topo \\ -agentTrace ON \\ -routerTrace ON \\ -macTrace ON \\ -movementTrace OFF \\ -ifNum $val(ni)
#t1.tcl
$ns_ change-numifs 1
$ns_ add-channel 0 $chan_(0) set node_(0) [$ns_ node] $node_(0) random-motion 0
$ns_ add-channel 0 $chan_(0) set node_(1) [$ns_ node] $node_(1) random-motion 0
$ns_ add-channel 0 $chan_(0) set node_(2) [$ns_ node] $node_(2) random-motion 0
$ns_ add-channel 0 $chan_(0) set node_(3) [$ns_ node] $node_(3) random-motion 0
#t2.tcl,只需修改这部分 $ns_ change-numifs 4 $ns_ add-channel 0 $chan_(0)
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