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關于SFN ?
提問者: li_an1986  提問時間: 2010-07-05    
 
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SFN翻譯成系統(tǒng)楨號,CFN翻譯成連接楨號。(&#*($(臟:JFD()$本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
SFN是在UE進行小區(qū)同步時從P-CCPCH中讀取的信息,CFN是在進行二次交織后用來識別無線楨用的。
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SFN        4fads13東oitK:JFD()$#_*(本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
Cell System Frame Number counter. SFN is sent on BCH. SFN is used for paging groups and system information scheduling etc. 2dsfds1faK:JFD()$#本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
In FDD SFN = BFN adjusted with T_cell.21fd3sK:JFD(本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
In TDD, if Inter Node B synchronisation port is used, SFN is locked to the BFN (i.e. SFN mod 256 = BFN mod 256).21f3dsK:JFD(本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
Range: 0 to 4095 frames.74*$#K:JFD本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
CFN        么$*@#(_@s4K:JFD()$#_*本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
Connection Frame Number (counter). CFN is the frame counter used for the L2/transport channel synchronisation between UE and UTRAN. A CFN value is associated to each TBS and it is passed together with it through the MAC-L1 SAP. CFN provides a common frame reference (at L2) to be used e.g. for synchronised transport channel reconfiguration .
The duration of the CFN cycle is longer than the maximum allowed transport delay between MAC and L1 (in UTRAN side, between SRNC and Node B, because the L1 functions that handle the transport channel synchronisation are in the Node B).re43289K:JFD()本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
Range: 0 to 255 frames. When used for PCH the range is 0 to 4095 frames
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 Frame Offset is a radio link specific L1 parameter used to map the CFN, used in the transport channel, into the SFN that defines the specific radio frame for the transmission on the air interface.321%$#(*$#K:JFD()$#_本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
At the L1/L2 interaction, the mapping is performed as:%kcvmK:JFD本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
        - SFN mod 256 = (CFN + Frame Offset) mod 256 (from L2 to L1)        (5.1);
        - CFN = (SFN - Frame Offset) mod 256 (from L1 to L2)        (5.2).
The resolution of all three parameters is 1 frame. Frame Offset and CFN have the same range (0…255) and only the 8 least significant bits of the SFN are used. The operations above are modulo 256.是434321K:JFD()$本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
In the UTRAN, the Frame Offset parameter is calculated by the SRNC and provided to the node B.oej道h$#$#&K:JFD()$#_*本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
The Transport Channel (or L2) synchronisation provides a L2 common frame numbering between UTRAN and UE (frame synchronisation between the L2 entities). This frame number is the Connection Frame Number (CFN) and it is associated at L2 to every TBS and passed to L1: the same CFN is received on the peer side associated with the same TBS.3s1fdK:JFD本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
The CFN is not transmitted in the air interface for each TBS, but is mapped by L1 to the SFN of the first radio frame used for the transmission of the TBS (the SFN is broadcast at L1 in the BCH). The mapping is performed via the Frame Offset parameters (see Figure 8).(*)#$K:JFD本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
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回答者: tscinter     回答時間:2010-07-05 10:39    

20        15        
hu0302  2014-04-24 15:48 



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 $#&)*K:JFD本文來自移動通信網(wǎng)m.gg1fic3.cn,版權所有
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回答者: robert2006     回答時間:2010-07-06 01:27    

10        8        

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