[ns] help, the tcl code about satellite
help, can somebody help me to trace that where is wrong with my tcl code ? global ns set ns [new Simulator] # Note: Even though "Static" is normally reserved for static #topologies, the satellite code will trigger a recalculation #of the routing tables whenever the topology changes. #Therefore, it is not so much "static" as "omniscient", in that #topology changes are known instantly throughout the topology. #See documentation for discussion of dynamic routing protocols. $ns rtproto Static ### # Global configuration parameters （全域通用參數）# ### ### #handoff的模擬是針對leo衛星網路模擬的部份。 # ### HandoffManager/Term set elevation_mask_ 8.2; #檢查當前衛星已經落到terminal的最小允許覆蓋角 HandoffManager/Term set term_handoff_int_ 10; # HandoffManager set handoff_randomization_ false; global opt set opt(chan) Channel/Sat ; #衛星通道 set opt(bw_down) 10Mb; ; # Downlink bandwidth (satellite to ground)（下行頻寬，衛星至地面） set opt(bw_up) 10Mb; ; # Uplink bandwidth（上行頻寬 ） set opt(phy) Phy/Sat ; #物理層：衛星 set opt(mac) Mac/Sat; #MAC層：衛星 set opt(ifq) Queue/DropTail; #佇列型態：DropTail set opt(qlim) 512 ; #Queue的最大值：256個 封包 set opt(ll) LL/Sat ; #鏈結層：衛星 set opt(wiredRouting) ON ; #三個事件："+"進佇列；"-"離開佇列； "r"接收到封包 # IMPORTANT This tracing enabling (trace-all) must precede link and node # creation. Then following all node, link, and error model # creation, invoke "$ns trace-all-satlinks $outfile" #重要：這個TRACE使(trace-all)必須在鏈接和結點建立之前。 # 然後跟隨的所有結點, 鏈接, 和錯誤模型的建立後,必須加入"$ns trace-all-satlinks $outfile" set outfile [open throughput_0.tr w] $ns trace-all $outfile ### # Set up satellite and terrestrial nodes # ### # Let's first create a single orbital plane of Iridium-like satellites # 11 satellites in a plane # Set up the node configuration #建立geo衛星 $ns node-config -satNodeType geo \ -llType $opt(ll) \ -ifqType $opt(ifq) \ -ifqLen $opt(qlim) \ -macType $opt(mac) \ -phyType $opt(phy) \ -channelType $opt(chan) \ -downlinkBW 10Mb \ -wiredRouting $opt(wiredRouting) # Create nodes n0 through n1 set n0 [$ns node]; ### #n3<>n1<>n0<>n2<>n4 # # 3<->1<->0<->2<->4 # # (satellite link) # ### # GEO satellite: above North America-- lets put it at 100 deg. W #設定geo衛星的位置 #n0設東經：100度 $n0 set-position 100 ### #Terminal # ### # Terminals: Let's put two within the US, two around the prime meridian $ns node-config -satNodeType terminal set n1 [$ns node] $n1 set-position 50 100; set n2 [$ns node] $n2 set-position -50 100; ### # Set up links# ### # Add any necessary ISLs or GSLs # GSLs to the geo satellite: #GEO-->Terminal #$n0 set downlink_ 10Mb #$n0 set uplink_ 10Mb $n1 add-gsl geo $opt(ll) $opt(ifq) $opt(qlim) $opt(mac) $opt(bw_up) \ $opt(phy) [$n0 set downlink_ ] [$n0 set uplink_] $n2 add-gsl geo $opt(ll) $opt(ifq) $opt(qlim) $opt(mac) $opt(bw_up) \ $opt(phy) [$n0 set downlink_] [$n0 set uplink_] puts "$n0 set_downlink" ### # wired link # ### $ns unset satNodeType_ set n3 [$ns node] set n4 [$ns node] $ns duplex-link $n3 $n1 10Mb 1ms DropTail; $ns duplex-link
[ns] FW: how do i transfrom "Bit Error Rate" to "Packet Error Rate"?
-Original Message- From: 林泰邑 [mailto:[EMAIL PROTECTED] Sent: Monday, October 02, 2006 6:39 PM To: 'Abdul Jabbar' Subject: RE: [ns] how do i transfrom "Bit Error Rate" to "Packet Error Rate"? for example : when I give ber=10^-3, packet size=1000bytes, what is PER? -Original Message- From: Abdul Jabbar [mailto:[EMAIL PROTECTED] Sent: Monday, October 02, 2006 6:24 PM To: 林泰邑 Cc: ns-users@isi.edu Subject: Re: [ns] how do i transfrom "Bit Error Rate" to "Packet Error Rate"? As far as I know, the relationship between BER and PER , assuming that bit errors are independent and uniformly distributed is, PER=1-(1-BER)^N where N is the number of bits. However, the above formula is only approximate because in real life scenarios, the bit errors are not completely independent but may occur in bursts. Further, the error distribution is also not exactly uniform. Hope it helps Cheers, Abdul. 林泰邑 wrote: > > > Hi all, how can I transform “Bit error Rate” to “packet error rate”? > > > > Is there any formulas for this ? > > > > Can any body help me? > > > >
[ns] how do i transfrom "Bit Error Rate" to "Packet Error Rate"?
Hi all, how can I transform “Bit error Rate” to “packet error rate”? Is there any formulas for this ? Can any body help me?
Re: [ns] help ! Does Anyone have TCP-Peach Module
This page can give the tcp-peach implementation in linux kernel, but I need the model in ns2. anyway thanks a lot. _ From: D V Phani Kumar [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 26, 2006 12:34 PM To: [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Subject: Re: [ns] help ! Does Anyone have TCP-Peach Module Hi, Do check this link. Hope u may get some info. http://users.ece.gatech.edu/~jfang/satellite/implementation.html phani The information contained in this e-mail message and/or attachments to it may contain confidential or privileged information. If you are not the intended recipient, any dissemination, use, review, distribution, printing or copying of the information contained in this e-mail message and/or attachments to it are strictly prohibited. If you have received this communication in error, please notify us by reply e-mail immediately and permanently delete the message and any attachments.
[ns] help ! Does Anyone have TCP-Peach Module?
OK, do you have any information or data about TCP-Peach? or do you know this model in detail ? and I also appreciate your help. thanks forgive my poor English. -Original Message- From: zenith siea [mailto:[EMAIL PROTECTED] Sent: Sunday, September 24, 2006 9:47 AM To: 林泰邑 Cc: ns-users@isi.edu Subject: 回复: help ! Does Anyone have TCP-Peach Module? Hello, Tai-Yei Lin, I need it too, in my expenmentation. will you please let me know if you get tcppeach module and share the module and the research between us? I am happy to get help and give help Thanks a lot 2006/9/22, 林泰邑 <[EMAIL PROTECTED]>: > > >
[ns] help ! Does Anyone have TCP-Peach Module?
Help, everybody, I need TCP-Peach Module to simulate my experimentation, so does anyone have TCP-Peach Module? Please help me , and I am happy to discuss about any kind of TCP agent on satellite. Thanks a lot. Tai-Yei Lin
