[ns] Bandwidth of wireless channel
mahrenho at ivs.cs.uni-magdeburg.de
Wed Apr 12 07:11:08 PDT 2006
> im working in qos routing in mobile adhoc networks.
> can anyone tell me why the "default" value of bandwidth is 0 in link layer
> of type "LL" (wireless routing simulation). Does that mean its not used or
> something else? I can see that the "delay" value is set to 25us by
> Also, can anyone tell me whether i can have "cost" param attached to
> wireless links as we can do in wired?
The short answer - there is nothing like a "wireless link". Wireless
communication uses a broadcast medium. Links are only logically defined
by your MAC layer or routing protocol. Additionally you do not have
something like a universal "bandwidth of the wireless channel". This
depends on your technology, modulation schemes etc. So you have to setup
this value depending on your model technology (e.g. 2 Mbit/s for a WLAN
using BPSK modulation).
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