according to Oxford Russian Dict.

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Note added at 40 Min. (2009-07-03 19:23:26 GMT)
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and in line with www.:
Originally a stopping place in the summer for Bedouin to refresh themselves as it is a natural oasis and to enjoy the cool sea breezes. ...
www.responsibletravel.com/trip/Trip901480.htm

"'Hirtha' is not a movable residential abode, but a military camp.
'Hirtha' is consonant not with Ghassanids (гассаниды) alleged nomadism, but with their function in the military system of Byzantium", -

'Byzantium and the Arabs in the sixth century by Irfan Shahid'

.

Bedouins - are partly nomads, and partly are not.
Their encampments are composed of multiple large tents with the biggest tent belonging to the Sheich - the tribe leader.

sic

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Note added at 2 days15 hrs (2009-07-06 10:24:19 GMT)
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Nomadic people or nomads (Greek: νομάδες, nomádes, "those who let pasture herds") are communities of people who move from one place to another, rather than settling permanently in one location. There are an estimated 30-40 million nomads in the world.[2] Many cultures have traditionally been nomadic, but traditional nomadic behavior is increasingly rare in industrialized countries. There are three kinds of nomads: hunter-gatherers moving between hunting grounds, pastoral nomads moving between pastures, and "peripatetic nomads" moving between customers.

Nomadic hunter-gatherers have by far the longest-lived subsistence method in human history, following seasonally available wild plants and game. Pastoralists raise herds and move with them so as not to deplete pasture beyond recovery in any one area. Peripatetic nomads are more common in industrialized nations, traveling from one territory to another and offering a trade wherever they go.