Comments for SkyPilot Blog http://www.skypilot.com/blog This blog focuses on broadband wireless principally centered around a technical perspective from SkyPilot's engineering team. Thu, 29 Jan 2009 18:15:01 -0800 http://wordpress.org/?v=2.8.4 hourly 1 Comment on Why Not Synchronous? by Randy Frei http://www.skypilot.com/blog/protocol/why-not-synchronous/comment-page-1/#comment-87 Randy Frei Thu, 29 Jan 2009 18:15:01 +0000 http://www.skypilot.com/blog/?p=17#comment-87 Mobility support hasn't been added to the synchronous protocol. We've currently decided to leverage the WiFi interfaces of the DualBand and TriBands (2.4, 4.9 Ghz) for mobility. Mobility support hasn’t been added to the synchronous protocol. We’ve currently decided to leverage the WiFi interfaces of the DualBand and TriBands (2.4, 4.9 Ghz) for mobility.

]]> Comment on Why Not Synchronous? by Marco http://www.skypilot.com/blog/protocol/why-not-synchronous/comment-page-1/#comment-86 Marco Wed, 28 Jan 2009 14:23:13 +0000 http://www.skypilot.com/blog/?p=17#comment-86 Thank's for answer. So , about mobility ( at low speed , 10MPH ) , your system how works ? Marco Thank’s for answer.

So , about mobility ( at low speed , 10MPH ) , your system how works ?

Marco

]]> Comment on Why Not Synchronous? by Randy Frei http://www.skypilot.com/blog/protocol/why-not-synchronous/comment-page-1/#comment-84 Randy Frei Tue, 27 Jan 2009 19:41:14 +0000 http://www.skypilot.com/blog/?p=17#comment-84 Good questions. We've considered running SyncMesh right on a user's PC, but general purpose platforms like Centrino are missing the "hard real-time" performance that our protocol needs. Regarding 2.4Ghz, we've found that even though propagation loss is lower at 2.4Ghz than 5Ghz, the decreased noise level at 5Ghz more than makes up for it. Plus, there are hundreds of Mhz available at 5Ghz in many regions, compared to 3 channels at 2.4Ghz. So, it comes down to decreased noise and more bandwidth. Good questions. We’ve considered running SyncMesh right on a user’s PC, but general purpose platforms like Centrino are missing the “hard real-time” performance that our protocol needs.

Regarding 2.4Ghz, we’ve found that even though propagation loss is lower at 2.4Ghz than 5Ghz, the decreased noise level at 5Ghz more than makes up for it. Plus, there are hundreds of Mhz available at 5Ghz in many regions, compared to 3 channels at 2.4Ghz. So, it comes down to decreased noise and more bandwidth.

]]> Comment on Why Not Synchronous? by Marco http://www.skypilot.com/blog/protocol/why-not-synchronous/comment-page-1/#comment-75 Marco Thu, 22 Jan 2009 13:24:02 +0000 http://www.skypilot.com/blog/?p=17#comment-75 Hi , Why not implement SyncMesh firmware for centrino ? And , why not in 2.4Ghz ? Thank's' in advance. Marco Hi ,

Why not implement SyncMesh firmware for centrino ? And , why not in 2.4Ghz ?

Thank’s’ in advance.

Marco

]]> Comment on Why Not Synchronous? by Marco http://www.skypilot.com/blog/protocol/why-not-synchronous/comment-page-1/#comment-40 Marco Sun, 21 Dec 2008 21:57:15 +0000 http://www.skypilot.com/blog/?p=17#comment-40 Thank's for replay :-) Of course , also Hiperlan/2 use 802.11 PHYs with TDMA/TDD. Regard's Marco Thank’s for replay :-)

Of course , also Hiperlan/2 use 802.11 PHYs with TDMA/TDD.

Regard’s

Marco

]]> Comment on Why Not Synchronous? by Randy Frei http://www.skypilot.com/blog/protocol/why-not-synchronous/comment-page-1/#comment-39 Randy Frei Sun, 21 Dec 2008 18:23:30 +0000 http://www.skypilot.com/blog/?p=17#comment-39 The MAC layers of SyncMesh and HiperLAN/2 both perform centralized TDMA scheduling, and they have similar capabilities. But the actual protocols are different since SyncMesh performs multi-hop scheduling in order to mesh/relay. The capabilities of the SyncMesh MAC layer are also very similar to WiMAX (many members of the protocol team came from cable modem backgrounds), but the protocol was designed to run over 802.11 PHYs which are very different than 802.16 PHYs. The MAC layers of SyncMesh and HiperLAN/2 both perform centralized TDMA scheduling, and they have similar capabilities. But the actual protocols are different since SyncMesh performs multi-hop scheduling in order to mesh/relay.

The capabilities of the SyncMesh MAC layer are also very similar to WiMAX (many members of the protocol team came from cable modem backgrounds), but the protocol was designed to run over 802.11 PHYs which are very different than 802.16 PHYs.

]]> Comment on Why Not Synchronous? by Marco http://www.skypilot.com/blog/protocol/why-not-synchronous/comment-page-1/#comment-37 Marco Sun, 21 Dec 2008 11:12:11 +0000 http://www.skypilot.com/blog/?p=17#comment-37 Hi Sir , Your protocol ( SyncMesh ) is like hiperlan/2 . Am'I wrong ? Thank's Marco Hi Sir ,

Your protocol ( SyncMesh ) is like hiperlan/2 . Am’I wrong ?

Thank’s

Marco

]]> Comment on Why Synchronous? (Part 1) by wireless cable modem http://www.skypilot.com/blog/protocol/why-synchronous-part-1/comment-page-1/#comment-14 wireless cable modem Wed, 29 Oct 2008 12:39:25 +0000 http://www.skypilot.com/blog/?p=6#comment-14 <strong>wireless cable modem...</strong> I found your post comments while searching Google. Very relevant especially as this is not an issue which a lot of peaople are conversant with.... wireless cable modem…

I found your post comments while searching Google. Very relevant especially as this is not an issue which a lot of peaople are conversant with….

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