[STDS-802-16] Inverse Bandwidth Distance relationship
Hi Folks,
greetings from the country with the most advanced pre mobile -16e - Wimax
deployment in the world (1).I wondered if anyone could shed some light on an
apparent facet of a wimax deployment.
A couple of sources (2)(3)seem to suggest that there is an inverse
relationship between the available bandwidth to a user and the distance from
the Base Station Radio (BSR). I am specifically interested in the range
limited case where it seems the modulation scheme changes 'down' the further
away an active user is away from the BSR.(3)
Assuming a uniform distribution of active users,in order to attempt to
'ration out' the available channel bandwidth, is it not possible to
restrict b/w to users that are closer to the BSR and using higher
modulation schemes at the expense of users further away at the cells edge ?
Otherwise it seems the system is no better than Wi-Fi where there definitely
is an inverse relationship between the available b/w to a user and the
distance (BSR received power) - MAC blocking protocol (CSMA-CD) aside aside
thanks and regards
David
(1) Australia Leads the World in Mobile WiMAX - June 2006
http://www.prnewswire.co.uk/cgi/news/release?id=173747
(2) WiMAX – A new alternative for wireless broadband access - Figure at
the end of the article.
http://www.eurescom.de/message/messageDec2004/WiMAX_A_new_alternative_for_wi
reless_broadband_access.asp
(3)WiMAX Deployment Considerations for Fixed Wireless Access in the 2.5 GHz
and 3.5 GHz Licensed Bands June 2005 Figure 1
http://www.wimaxforum.org/news/downloads/DeploymentConsiderations_White_Pape
rRev_1_4.pdf