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Cellular Phone Forum / General / GSM / March 2005GSM Base Station Frame timing offset
Do nearby base station cells in a GSM network have exactly the same frame timing or do they offset their frame times from one another? Also do different sectors in the same base station cell offset their frame timing from one another? I assume that a mobile may handoff frome one sector to another sector in the same base station cell. Is this correct? Could you point me to a reference? Thanks master@intelligencia.com wrote in news:1111505985.259305.202850 @o13g2000cwo.googlegroups.com: > Do nearby base station cells in a GSM network have exactly the same > frame timing or do they offset their frame times from one another? Thay *can* but this is not compulsory. Is is although recomended to implement the forthcoming interference cancellation algorithms. > Also do different sectors in the same base station cell offset their > frame timing from one another? No, in that case they're all synchronised, thanks to the base station's master clock. > I assume that a mobile may handoff frome one sector to another sector > in the same base station cell. Is this correct? This is correct. They even can handoff within one sector (intracell HO). > Could you point me to a reference? http://www.3gamericas.org/PDFs/saic_paper_sept2003.pdf > Thanks You're welcome.  SignatureCheers, Olivier Hmm, the sites not workin' anymore -- ChaosThyre81 > Hmm, the sites not workin' anymore? Unfortunately the white paper section of 3G America's website seems to be down. None of the links listed on the WP home page http://www.3gamericas.org/English/Technology_Center/WhitePapers/index.cfm? archive=1 are available. Hope it will soon be fixed. Here is a HTML version from Google's cache : http://minilien.com/?7KS5kzHwrA Don't trust the figures, their make up is irrelevant (synchronized frames are shown... as is they were not always synchronized on the bottom of figure 1). SignatureCheers, Olivier |
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