谁能比较一下移动WiMAX和802.20的本质区别啊

802.20是基于IP，802.16e还支持ATM，这样可以跟3G融合。
我也不是很清楚，大家讨论一下。

传输速率及范围只有WiMAX的一半，但802.20却拥有更出色的移动性能，其时间迟延只有
10毫秒，而3G的标准是500毫秒；并且在250公里每小时状态下还能保持通讯不中断，而
WiMAX只能达到100公里每小时。
这是搜到的，不过感觉现在802.20发展不如WiMax。

从两个标准使用的物理层技术来看，似乎没太大的区别，都采用OFDM、MIMO、智能天线这些技术，网上有报道说这两种技术存在很强的竞争性，不知道对不对。

我也是在网上看到的，20没有研究过ei。
20现在火吗？

火是从什么角度说呢？做研究可能有些空间，但从市场来说，20现在肯定比不过WiMAX，因为20的标准还在制定中。上周在北邮听了高通的人讲CDMA，也提到了20，他是乎说EV-DO Rev C和20很接近，高通好像在推20。

高通买了Flash-OFDM，想把这玩艺儿做成802.20，没啥意思

802.20WG被暂时停止了...
==============================================
On 8 June 2006, the IEEE-SA Standards Board directed that all activities of the 802.20 Working Group be temporarily suspended. This suspension is effective immediately and will continue in effect until 1 October 2006. Consequently, the 802.20 plenary in July 2006 and the interim in September 2006 are cancelled. The November plenary is not affected by this decision. The Board also made a number of other decisions, relating to the procedures that it will follow in considering and making further decisions and giving direction to the 802 chair for further handling of the situation.
The decision to suspend 802.20 was made primarily for two reasons. First, the Working Group has been the subject of several appeals from the very beginning of the group, with three appeals now pending at one level or another, and recent activity in the group appears to have become highly contentious – significantly beyond what is normally experienced in IEEE-SA. Second, a preliminary investigation into the group's operation revealed a lack of transparency, possible “dominance,” and other irregularities in the Working Group.
The Standards Board is obligated to ensure the draft standard is developed through a fair and open process. The Standards Board intends, if possible, to remove the barriers to successful completion of the Working Group’s mission -- approval of an 802.20 standard. This suspension will give the Standards Board time to consider the pending appeals (and possible additional actions independent of the appeals) and to give the participants in the 802.20 Working Group the opportunity to share their perspectives with the Standards Board and IEEE-SA staff on possible solutions for addressing the Standards Board’s concerns. The suspension will also avoid potential waste of participants’ time and energy, because, lacking a suspension period, decisions made by the Working Group over the next few months could effectively be undone based on the results of current appeals, possible future appeals, or Standards Board actions.
Membership and participation credits in the Working Group at the time of suspension are maintained until the suspension is lifted. In other words (and subject to any further decision by the Standards Board after it has completed its review), those who are currently members will remain so, and no participation credits will be earned or lost during the suspension.
The Standards Board will further review the facts and consider appropriate action for the Working Group at the September 2006 meeting of the Standards Board. Interested parties will be offered an opportunity to provide input.

看来20标准委员会里边的斗争很是激烈啊~~~~~~~~~