Hi
I am working on wireless ad hoc networks. 
I have simple scenario in which one node is sending packets to other.
I set packet size 512 bytes and interval between each packet is 0.0025.
it means application layer (CBR) generate total 1/0.0025 = 400 packets in a 
second. Each packet is 512x8 = 4096 bits (512 bytes).
It means application layer is generating 1.6384 Mbits per second. 
I have set,
 ============================
 Mac/802_11 set bandwidth_    11Mb  

 Mac/802_11 set PreambleLength_  144
 Mac/802_11 set PLCPHeaderLength_ 48
 Mac/802_11 set PLCPDataRate 1.0e6 
 Mac/802_11 set dataRate_ 20M
 
 Mac/802_11 set ShortRetryLimit_ 7
 Mac/802_11 set LongRetryLimit_ 4
 Mac/802_11 set MinimumBandwidth_ 11mb
===================================
Sending application layer is generating packets at rate of 1.6384 Mbps but 
receiver is getting data at  rate of just 0.7 Mbps, which is very less, almost 
half.
Interesting thing is that when I change 
Mac/802_11 set PLCPDataRate 1.0e6  
to
Mac/802_11 set PLCPDataRate 11.0e6 
because I need total 11 Mbps bandwidth. this throughput increases from 0.7 to 
0.8 Mbps but still not 1.6384 Mbps.

 would be greatly thankful to you If anybody solve my problem.

Looking to get kind response from yourside. 
Regards
Azam

Muhammad Azam Akram
MSc Communication & Interactivity
Linköping University,
Linköping, Sweden.
Address: Tröskaregatan 11, 
Lambohov 58333, 
Linköping, Sweden.
Mobile: 00 46 73 569 06 77

 
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