几个关于标准缩略语的问题

1。UE和UTRAN之间的接口Uu到底是什么缩写？
同问，Iu?  Iub?  Iur?  Cu?
2.UMTS,3gpp,imt-2000,wcdma 这些的关系到底是怎么回事？
尤其是前三者？
比如那本书名为WCDMA  FOR  UMTS-。。。
书中提到的体系结构好像就是UMTS，然后就好像wcdma的体系结构就是这样，UMTS的体系结构还可以适用其他的系统。
3。功率控制中常提到的步长1db到底是个什么概念？是不是每次变化为10log(p变/p原）=1db?
谢谢！

2.其实这些名词你可以google的，我想在任何一本讲3G的书中，讲背景的地方都会有提及。以下是我google的，FYI
IMT2000 is a vision for a single global standard for wireless networks proposed by the ITU (International Telecommunications Union). It is often perceived as a global 3G (Third generation) system.
In all, these technologies fall under the ITUs generic name of IMT-2000 (International Mobile Telecommunications 2000). But when the ITU tried to unify and standardise 3G technologies, no consensus was reached. There were thus five terrestrial standards developed as part of the IMT-2000 program. Instead, depending on where in the world 3G will be implemented, the 3G standard will be based on CDMA variants cdma2000 or W-CDMA.
The primary CDMA variants that will be used in IMT-2000 3G networks are W-CDMA (Wideband CDMA) and cdma2000, which are similar but not the same, so that W-CDMA handsets will not work with cdma2000 handsets and visa versa.
In Europe, 3G  W-CDMA networks are known as UMTS  (Universal Mobile Telephony System) another name for w-CDMA/3G services.
3GPP - Third Generation Partnership Project
The 3GPP was formed in December 1998 as a collaboration agreement bringing together a number of telecommunication standards bodies. These standards bodies are referred to as Organizational Partners. The original aim of the 3GPP was to produce globally applicable technical specifications for third generation mobile systems based on evolved GSM core networks and the radio access technology UTRA (Universal Terrestrial Radio Access). This was subsequently amended to include the maintenance and development of the GSM standards including GPRS and EDGE (Enhanced Data rates for Global Evolution).
通俗的讲，IMT2000是当时提出的关于未来移动通信的框架，在该框架下有两大标准即WCDMA（欧洲，UMTS）和cdma2000（北美）。WCDMA对应的标准化组织是3gpp；cdma2000对应的标准化组织是3gpp2。总结的不对，请大家指正。

1，其实知道接口的全拼没什么大的意义。个人理解也没有统一的缩写标准，你只要知道它是谁跟谁的接口就行了，缩写和它所连接的实体间还是有一定联系的
^_^

thanks a lot.
that's what i need.
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In Europe, 3G  W-CDMA networks are known as UMTS  (Universal Mobile Telephony System) another name for w-CDMA/3G services.
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no,it makes no sense.but if i know,i will take it in my mind more deeply.

UMTS是整个系统的称谓,WCDMA多指其空口

呵呵，话可不是这么说，就这几个接口，如果你就研究他们，一段时间以后，情况通常是提起它们，并不是它们的全称首先刺激的脑细胞；如果只是过客，也许知道了全称会记得相对老些，问题是你一定就保证就不会忘记了？费了九牛二虎之力找出来，“功耗比”又是多少呢
再次向你的好学精神致敬，如果找到了答案，别忘了来这里吼一声
^_^