CDMA20001xEV-DO edition B technology is to expand many signal carriers to the single signal carrier EV-DO edition A technology, so are known as many signal carriers EV-DO. May of 2006, 3GPP2 released EV-DO edition B interface agreement in the sky, namely many signal carrier EV-DO technologies. ... Read more
China has made the leading development speed of world interest in CDMA/EV-DO wireless technical field, but this has brought the enormous pressure to network operator and mobile device manufacturer. Good news is, the main CDMA/EV-DO operator of China will support to exceed 100 million users in the next two years. Bad news is, the apparatus defect or poor efficiency will be enlarged by 100 million times while causing any small negative effect. ... Read more
Cdma2000 and 1xEV-DO, as two kinds of subsequent technology of CDMA, it is mixed that there is common technology: Adopt the same one and expand the way frequently, namely 1.2288Mcps one yard of speed; The same RF bandwidth 1.25MHz ; Adopt same frequency band and the intersection of channel and No. ‘ Can’t be mutual overlap uses at the same time . But both there are many differences. ... Read more
Main difference between and getting in touch cdma2000 and 1xEV-DO ... Read more
It is a kind of developing direction that the summary makes use of IMS and SIP to realize instant news. There are two kinds of methods to make use of IMS to realize instant news at present, each there is tendentiousness in employing the occasion after their own characteristics determine them. This text starts with realizing the mechanism, has paid analyzing to compare these two kinds of technology, especially compared they store and protect the difference which realize the respect with personal secrets in news management, news distributing, news, thus point out them in the applied characteristic. ... Read more
Come, say, make the third generation of the intersection of mobile communication and standard standardize, organize mainly having 3GPP and 3GPP2 from world. 3GPP is mainly responsible for FDD WCDMA With TDD HCR TDD and LCR TDD Standardization of technology. 3GPP2 is mainly responsible for the standardization work of cdma2000 technology. ... Read more
3G develops brief introduction ... Read more
0 foreword ... Read more
3G develops brief introduction ... Read more
The summary origin, developing history and current situation normal in test to cdma2000 agreement consistency of 1X Release 0 have been introduced and analyzed in detail. According to analysis, have explained to the agreement consistency test normal reason, purpose and way to recombinate that recombinates of 3GPP2 in detail. ... Read more
