tag:blogger.com,1999:blog-39601522933804470452024-09-29T10:56:27.585+08:00Sharing knowledge and information about GSM Technology and 3G, WCDMA, from one of Telecommunication Vendor.Unknownnoreply@blogger.comBlogger6125tag:blogger.com,1999:blog-3960152293380447045.post-27039727982575064932012-10-01T05:04:00.001+08:002012-10-01T05:04:26.260+08:00

The history of mobile communication can be traced back to the early 20th century, but its fast growth did not come until recent 20 years. The development of mobile communications technologies is basically focused on opening new frequency ranges for mobile communications, effective frequency utilization, and mobile station miniaturization and portability. Here, the technology for effective

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-3960152293380447045.post-50466655423887060272012-09-29T08:42:00.000+08:002012-09-29T08:42:17.852+08:00

When TC is internal, the position of ZXG10 iBSC (V6.20) in the network is shown in Figure 1. When TC is external, the position of iBSC in the network is shown in Figure 2.  ZXG10 iBSC (V6.20) is a part of GERAN (the GSM/EDGE Radio Access Network). GERAN includes one or multiple BSSs, and one BSS consists of one BSC and one or multiple BTSs. BSC is connected with BTS via Abis

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-3960152293380447045.post-66559751094587392352012-09-28T23:00:00.000+08:002012-09-28T23:00:08.378+08:00

3GPP standard versions include R99, R4, R5, R6 and R7. R99 version was frozen formally in Mar, 2000, and refreshes once every three months. Current commercial version of R99 is based on the version of June, 2001, for in later version, the number of CR is decreasing rapidly and there are no larger modifications and non-compatible upgrade. R4 version was frozen in Mar, 2001. It passed in Mar, 2002

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-3960152293380447045.post-64636075188448005602012-09-28T19:30:00.000+08:002012-09-28T19:30:04.881+08:00

WCDMA was originated by standardization organizations and manufacturers in European countries and Japan. WCDMA inherits the high standardization and openness of GSM, and its standardization progresses smoothly. WCDMA is the third generation mobile communication standard developed by 3GPP, with the GSM MAP as its core and UTRAN (UMTS Terrestrial Radio Access Network) as its wireless interface.

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-3960152293380447045.post-77162738496227112842012-09-28T17:59:00.002+08:002012-09-28T18:06:02.318+08:00

The 3rd Generation Mobile Communication System (3G) is put on agenda when the 2nd generation (2G) digital mobile communication market is booming. The 2G mobile communication system has the following disadvantages: limited frequency spectrum resources, low frequency spectrum utilization, and weak support for mobile multimedia services (providing only speech and low-speed data services). Also,

Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-3960152293380447045.post-8736200265683772922012-09-28T17:30:00.001+08:002012-09-28T17:30:07.665+08:00

GSM, as the second generation mobile cell communication system, voice service as primary one, has been extensively applied. But with the development of mobile communication technology and diversity of service, demands on mobile data service is increasing. Demands on data service is more urgent than before, along with the demands increased for GSM equipment, including IP Gb interface, Iu

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