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Faster than you need is not fast enough

Aug 23, 20043 mins
Cellular NetworksNetwork Security

There is something in a standards organization that abhors a limit. The latest example is the work underway in the IEEE 802.11n project.

There is something in a standards organization that abhors a limit. The latest example is the work underway in the IEEE 802.11n project.

There is a lot of wrangling to go yet but the goals of the project are impressive enough. The High Throughput Study Group (802.11n)  was authorized by the IEEE about a year ago to define a new version of the wildly popular 802.11 wireless LAN standard that could run at twice (or more) the speed of the 54M bit/sec 802.11a/g standards. (Also see the formation document for the study group  and the project criteria)

The presentations to explain individual proposals for technology to meet the criteria were due mid-August. Last June more than 60 people had indicated that they intended to make presentations about full or partial proposals, but I’ve not seen how many submitted presentations.

Two groups seem to have decided that PR campaigns might help their chances when it comes to getting their proposals adopted. The first group, Task Group n, which is calling its proposal TGn Sync, includes Agere Systems, Atheros, Intel, Nokia, Philips and Sony. There is a white paper on the TGn Sync proposal. The other group calls its proposal WWiSE, which stands for World-Wide Spectrum Efficiency. The WWiSE group includes Airgo, Bermai, Broadcom, Conexant, STMicro and Texas Instruments..

The name of the second proposal alludes to one of the differences between them – the WWiSE proposal uses 20-MHz channels, which are supported in all countries and the TGn Sync proposal uses 40-MHz channels, which are not supported in Japan but can back off to 20-MHz channels. Both proposals include modes that are compatible with 802.11a/b/g and other modes that support 500M bit/sec or faster data rates.

One hopes these two groups can work together, along with some subset of the other proposers, to come up with one standard within a reasonable time period.

The WWiSE group is taking an interesting tact by offering, with some specific conditions, to license the technology in their proposal royalty-free to companies implementing the resulting IEEE standard (assuming their proposal becomes the standard). This might look better than it is because these days it’s unlikely that the members of any particular group will own or control all the patents that lawyers somewhere will apply to a standard. Just to make the intellectual property rights games more interesting, there is no reason to think that all the companies that might decide to assert patent rights in the future are currently participating in the IEEE discussions where they might have to disclose such patents or patent applications.

I’m sure that bandwidth-wasting applications will be developed (like the memory-wasting applications so popular for PCs these days) that will make use of the data rates that 802.11n will enable. But in the meantime, I can get the same vicarious thrill with wireless as I do now with my Gigabit Ethernet-equipped laptop plugged into my home Gigabit Ethernet LAN and connected to my rather non-gigabit cable modem.

I’m sure there are theoretical and practical limits to the data rates that can be teased out of this type of technology but, using history as a guide, I wouldn’t want to bet on what the standards will include 10 years from now.

Disclaimer: Part of Harvard’s job is the testing of perceived theoretical and practical limits on all sorts of things, but I didn’t ask about this particular one, thus the above opinion is mine.