We've been taking an incremental approach on the EMANE development. We have specifically discussed eventually using previous location plus velocity vector to allow for some interpolation of location.
Thus based on the packet transmission timestamp and its receive time, the NEMs _could_ interpolate the sender/receiver positions on a per packet basis. However, the outstanding question is if propagation prediction can computed on a per-packet basis. In many cases, we're using prescripted pathloss computations and depending upon the propagation model used, per-packet computation may be prohibitive. Note that the location/pathloss events are not required to be on 1-second update intervals. You could dispatch EMANE location/pathloss events at a higher update rate if needed ... The main reason non-changing location events are still fed on the typically 1-second update interval is the use of best effort multicast UDP for the EMANE event messaging. If we go to a reliable event messaging mechanism, that could change ... also would make increased complexity of events less risky (e..g relying on velocity & location events, etc) Brian Adamson [email protected] On Mar 6, 2014, at 10:21 AM, Cheng, Bow-Nan - 0665 - MITLL wrote: > Hello, > > In reading the EMANE users guide, section 4.3.2 talks about location events > and mentions that location events maintain a table of NEM Ids and location, > orientation and velocity. > > I was wondering if EMANE has a mechanism to interpolate position based on > orientation and velocity. For example, instead of feeding in an event every > second with the updated position, is it possible in EMANE To feed in an > orientation and velocity and have EMANE automatically calculate/interpolate > how to move from one point to another point? > > Or is the location event meant to feed position events into EMANE only (I.e. > , if I feed a position every 5 minutes, then the node will "jump") > > Thanks! > > -Bow-Nan > > > _______________________________________________ > emane-users mailing list > [email protected] > http://pf.itd.nrl.navy.mil/mailman/listinfo/emane-users
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