Soroush, your RxPower (-103) is below RxSensitivity (-97) so the packets are getting dropped within the PHY and not making it up to the 80211abg radio model. The negative SINR comes into play within the radio model when there is noise and/or interference on the channel. The receive power must always be higher than the receiver sensitivity to make it past the PHY.
kb Kaushik B. Patel Adjacent Link LLC On 12/11/2015 03:57 PM, [REDACTED] wrote: > ok tnx. but why I'm not seeing any drop while configuring EMANE for > different pathloss . > for instance this is my ieee802.11.xml and ieee802.11 NEM files which I've > configure . here index data rate is one and I suppose to drop %50 of packet > roughly base on the PCR curve when assign pathloss of 103 . > based on my calculation : > > -97 = -174 + 4dB + 10log(20M) > SINR = -103-(-97) > SINR=-6 > but when I ping from node A to node B , I'm losing connection between > node-a radio and node-b radio , I mean they're not reachable. > actually, I'm losing connection between nodes emane0 interface if I set > pathloss greater than 96 . > Am I doing anything wrong ? > > Thanks > > <?xml version="1.0" encoding="UTF-8"?> > <!DOCTYPE mac SYSTEM "file:///usr/share/emane/dtd/mac.dtd"> > <mac library="ieee80211abgmaclayer"> > <param name="mode" value="2"/> > <param name="enablepromiscuousmode" value="off"/> > <param name="distance" value="1000"/> > <param name="unicastrate" value="1"/> > <param name="multicastrate" value="1"/> > <param name="pcrcurveuri" > > > value="file:///usr/share/emane/xml/models/mac/ieee80211abg/ieee80211pcr.xml"/> > <param name="flowcontrolenable" value="off"/> > <param name="flowcontroltokens" value="10"/> > <param name="radiometricenable" value="off"/> > <param name="retrylimit0" value="4"/> > <param name="retrylimit1" value="4"/> > <param name="retrylimit2" value="4"/> > <param name="retrylimit3" value="4"/> > </mac> > > > <?xml version="1.0" encoding="UTF-8"?> > <!DOCTYPE nem SYSTEM "file:///usr/share/emane/dtd/nem.dtd"> > <nem name="IEEE 802.11 NEM"> > <transport definition="transvirtual.xml"/> > <mac definition="ieee80211abgmac.xml"/> > <phy> > <param name="fixedantennagain" value="0.0"/> > <param name="fixedantennagainenable" value="on"/> > <param name="bandwidth" value="20M"/> > <param name="noisemode" value="outofband"/> > <param name="propagationmodel" value="precomputed"/> > <param name="systemnoisefigure" value="4.0"/> > <param name="txpower" value="0.0"/> > <param name="subid" value="1"/> > </phy> > </nem> > > > <!-- 1Mpbs --> > <datarate index="1"> > <row sinr="-9.0" por="0.0"/> > <row sinr="-8.0" por="1.4"/> > <row sinr="-7.0" por="21.0"/> > <row sinr="-6.0" por="63.5"/> > <row sinr="-5.0" por="90.7"/> > <row sinr="-4.0" por="98.6"/> > <row sinr="-3.0" por="99.9"/> > <row sinr="-2.0" por="100.0"/> > </datarate> > > > > > > > On Fri, Dec 11, 2015 at 12:33 PM, Steven Galgano <[email protected]> > wrote: > >> Soroush, >> >> Please stay on list for this thread. >> >> That issue has been resolved for two years. Unless you are using a >> version of emane prior to 0.9, you are fine. >> >> -- >> Steven Galgano >> Adjacent Link LLC >> www.adjacentlink.com >> >> >> On 12/11/2015 02:57 PM, [REDACTED] wrote: >>> Hi Steven, >>> >>> here is the link >>> >> https://www.mail-archive.com/[email protected]&q=subject:%22Re%5C%3A+%5C%5Bemane%5C-users%5C%5D+%5C%5Bcore%5C-users%5C%5D+which+pathloss+with+freespace+and%092ray+models%5C%3F%22&o=newest&f=1 >>> >>> Thanks in advance for your respond . >>> >>> >>> >>> On Fri, Dec 11, 2015 at 11:46 AM, Steven Galgano >>> <[email protected] <mailto:[email protected]>> wrote: >>> >>> Soroush, >>> >>> To what issue are you referring? >>> >>> -- >>> Steven Galgano >>> Adjacent Link LLC >>> www.adjacentlink.com <http://www.adjacentlink.com> >>> >>> >>> On 12/11/2015 02:36 PM, [REDACTED] wrote: >>> > Hello, >>> > >>> > I wonder , where may I get patch that resolve issue related to >>> pathloss >>> > for ieee80211pcr? >>> > >>> > >>> > Thanks, >>> > Soroush >>> > >>> > >>> > _______________________________________________ >>> > emane-users mailing list >>> > [email protected] >>> <mailto:[email protected]> >>> > http://pf.itd.nrl.navy.mil/mailman/listinfo/emane-users >>> > >>> >>> >> > > > > _______________________________________________ > emane-users mailing list > [email protected] > http://pf.itd.nrl.navy.mil/mailman/listinfo/emane-users > _______________________________________________ emane-users mailing list [email protected] http://pf.itd.nrl.navy.mil/mailman/listinfo/emane-users
