I look forward to seeing everyone at 4G World next week. Personally, I don't care for D or E in a fixed deployment, but if you nailed me down I would go with D. WiMAX tries to be too many things for too many people. WiMAX-based proprietary systems are far more useful for fixed deployments.
-Matt On Wed, Sep 9, 2009 at 5:28 PM, Patrick Leary <[email protected]> wrote: > The subject question is one Aperto thinks should be asked and now is the > time to ask it. The WiMAX Forum has been beating the 802.16e drum in a > manner trying to chump 802.16d. The fact is, there are two WiMAX > standards, not one. By the Forum's own words from a 2005 paper it put > out in November 2005, penned by Monica Paoli of Seza Fila: > > "The WiMAX Forum is committed to providing optimized solutions for > fixed, nomadic, > portable and mobile broadband wireless access. Two versions of WiMAX > address the > demand for these different types of access: > * 802.16-2004 WiMAX. This is based on the 802.16-2004 version of the > IEEE 802.16 > standard and on ETSI HiperMAN. It uses Orthogonal Frequency Division > Multiplexing (OFDM) and supports fixed and nomadic access in Line of > Sight > (LOS) and Non Line of Sight (NLOS) environments. > * 802.16e WiMAX. Optimized for dynamic mobile radio channels, this > version is > based on the 802.16e amendment and provides support for handoffs and > roaming." > > It is time the Forum own up to their own words, so Aperto is going to > asking the question at 4G World coming up in Chicago next week. The fact > is, the fixed standard is stable and ideal for what it was designed to > do: deliver fixed (and limited nomadicity) wireless broadband. This > version of the standard is better, yes better, than the mobile version > for doing metroscale fixed. It provides 13% more capacity per MHz and > 35% or so less latency. It can also be configured for symmetric or even > higher ratio upstream vs. downstream, which is critical for networks > doing high capacity upstream like video surveillance. > > For too long, vendors that now only do the mobile standard have been > trying to squeeze the round peg of the mobile standard into the square > hole of fixed networks. This has been confusing many, and leading some > to overpay for their networks. Why pay for millions in R&D for features > that you can never use, especially in a 3.65 GHz network where mobile > can't happen? We have seen "consultants" spec'ing in E for 3.65 GHz, > thinking they will get interoperability and even PC cards for their > networks. They also think they can get self-install -- something this > community knows is not possible in 3.65 GHz due to the power > restrictions placed on indoor modems. Operators and other would-be WiMAX > deployers are being hoodwinked. > > The E standard does enable use of diversity, but it comes at a high cost > and is of limited benefit for rural operators. The truth is that > diversity is designed to increase link budgets to support self-install. > > Basically, each standard has its place, E is for people in 2.5 GHz doing > self-install, like Clearwire, and we all know the low service > (especially low upstream) packages offered in Clearwire's service. D is > better and cheaper for rural fixed operators, and especially for public > safety video type networks and definitely for voice-centric users. D is > better for enterprise, where many users sit behind the CPE. E is better > for roaming individual users with modest expectations. > > We'd like to hear your opinions, and if you like to discuss this with us > while at 4G World, please drop me a note. > > Regards, > > Patrick Leary > Aperto Networks > > > Patrick Leary > Aperto Networks > 813.426.4230 mobile > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
