[Olsr-dev] OLSRd 0.5.4 and 0.5.5 with ETT available

[Sven-Ola Tücke]

Hi Eric,

you basically replaced the linkqualitymult by some factor based on interface 
characteristics?

// Sven-Ola

Am Dienstag 19 Februar 2008 18:39:38 schrieb Erik Tromp:
> Hello again,
>
> I'd like to announce the availability of two new OLSR-LC releases, which
> have been based on the most recent versions of OLSRd (0.5.4 and 0.5.5).
>
> The downloads can be found at:
>
>   http://sourceforge.net/projects/olsr-lc
>
> If you have any questions, remarks or suggestions, feel free to contact me!
>
> Regards,
> Erik
>
>
>
>
>
> -----Oorspronkelijk bericht-----
> Van: Erik Tromp [mailto:(spam-protected)]
> Verzonden: zondag 10 februari 2008 12:38
> Aan: '(spam-protected)'
> Onderwerp: OLSRd with ETT available
>
>
> Hello All,
>
> This is to announce the availability of the first release of OLSR-LC.
>
> OLSR-LC is OLSR enhanced with link-cost extensions. OLSR-LC was initially
> developed on version 0.4.10 of OLSRd, and was ported up to version 0.5.3 .
> In the coming weeks I will put effort in porting the extensions up to the
> most recent versions of OLSRD, versions 0.5.4 and 0.5.5 .
>
> The link-cost extensions were developed at Thales Communication, Huizen,
> Netherlands, and is currently maintained by Erik Tromp, Avantec Engineering
> ( www.avantec.nl )
>
> You can get a copy of the source code at:
>
>   http://sourceforge.net/projects/olsr-lc
>
> How to install it: download the file olsrd-0.5.3-lc-0.1.tar.gz from the
> above URL into a directory of your choice.
>
> At the command prompt, cd to the directory in which you saved the
> downloaded file, and type:
>
>   tar -zxvf ./olsrd-0.5.3-lc-0.1.tar.gz
>
> This will create the directory olsrd-0.5.3-lc-0.1 and unpack all source
> files in that directory.
>
> Then type:
>
>   cd olsrd-0.5.3-lc-0.1
>   make build_all
>
> followed by:
>
>   make install_all
>
> In the lib directory you will find a sub-directory ett . This contains a
> basic setup of a plugin that can be used to calculate link costs based on
> Expected Transmission Time (ETT) . For ETT you need the medium speed
> (Mbit/s). Then you can use the formula:
>
>  ETT = ETX * #bits / bitspeed
>
> The actual implementation of this plugin is still to be written. Currently
> the plugin does nothing more than to set the link speed of each available
> neighbor link every 10 seconds to a random value of either 1 or 2 Mbit/sec
> .
>
> An actual implementation of the ETT plugin could be based on measuring,
> once every so many minutes, the speed of the available links with all the
> neighbors.
> This could be done using the well-known packet-pair technique. That
> approach would be purely layer-3, so no interfacing with layer-2 metrics.
>
> An alternative to measuring (via RTT or packet-pair methods) would be to
> write a plugin that retrieves layer 2 information. An existing
> implementation might be found the XIAN framework; see
> http://xian.sourceforge.net/ .
>
> Of course there are many other ways to measure the speed. And, in absence
> of any automatic measuring method, one could also fall back to setting the
> speed values manually to a fixed (pre-configured) value. The initial speed
> values, together with other link cost values, can be configured in the
> olsrd.conf file; for an example see ...\files\olsrd.conf.default.lq .
>
> If you have an example of source code that can read out layer-2 metrics I
> would be very interested !
>
> As always: have fun with it!
>
> Erik Tromp