Hello, thanks. Yes we know that bug. How to install the patch when it will be available?
About your answers. >>> Hi All, >>> >>> as reported in the EMANE manual, one packet is received or discarded with >>> Probability of Reception (POR) based on the following relations: >>> SINR= rxPower - rxSenstivity >>> >>> where: >>> rxPower = txPower + txAntennaGain + rxAntennaGain - pathloss >>> rxSensitivity = -174 + NF + 10 log10(bandwidth) >>> >>> In the case I'm using freespace or 2ray models in EMANE which is the value >>> of pathloss? >> pathloss is computed using the appropriate formulas for freespace (frequency >> and distance based) or 2ray (frequency and antenna height based). >>> Which are the right formulas? Could you please confirm the following: Freespace case: pathloss = 20 log (d) + 20 log (f) -27.55 where d in meters and f in MHz. What is the formula for 2ray model? Do you know how I could set up my canvas in order to get a range till 7 Km? I tried with scale from GUI but I didn't understand if my settings are right. Thanks, Simone On Jul 22, 2013, at 8:16 PM, Kaushik B. Patel <[email protected]> wrote: > Simone, a bug in emane was recently reported that deals with using cached > pathloss value when only the remote node's location changes. A patch will be > issued soon to resolve this. > > As far as your questions, see comments in-line below. > > Kaushik B. Patel > Adjacent Link LLC > On 07/22/2013 09:27 AM, smlabs wrote: >> Hi All, >> >> as reported in the EMANE manual, one packet is received or discarded with >> Probability of Reception (POR) based on the following relations: >> SINR= rxPower - rxSenstivity >> >> where: >> rxPower = txPower + txAntennaGain + rxAntennaGain - pathloss >> rxSensitivity = -174 + NF + 10 log10(bandwidth) >> >> In the case I'm using freespace or 2ray models in EMANE which is the value >> of pathloss? > pathloss is computed using the appropriate formulas for freespace (frequency > and distance based) or 2ray (frequency and antenna height based). >> >> For instance: >> >> SINR and POR are defined in ieee80211pcr.xml. >> If I have an unicast rate equal to 24Mbps = index 9 I'm interested to the >> following section in the xml: >> <datarate index="9" rate="24Mbps"> >> <row sinr="9.0" por="0.0"/> >> <row sinr="10.0" por="2.2"/> >> <row sinr="11.0" por="23.8"/> >> <row sinr="12.0" por="64.4"/> >> <row sinr="13.0" por="90.4"/> >> <row sinr="14.0" por="98.4"/> >> <row sinr="15.0" por="99.8"/> >> <row sinr="16.0" por="100.0"/> >> </datarate> >> >> That means that from my previous formulas SINR should be compared to the >> values in XML. >> Is that right? > Yes >> >> Last question, the value of POR in XML is POR or POR0 from the following >> formula: >> POR=POR0^(S1/S0) >> >> where S1packet size received (e.g. 1400 bit) and S0 = 128 defined in the XML. >> >> Is that right? > Yes >> >> Thanks in advance for your answers. >> >> Best Regards, >> Simone >> >> >> >> _______________________________________________ >> core-users mailing list >> [email protected] >> http://pf.itd.nrl.navy.mil/mailman/listinfo/core-users >
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