为了生活，发这样的帖子，希望大家体谅。
超级详细的信令资料，虽然是英语版，但简单易懂，对每条信令信源做出了详细解释。大家可能都有同感，虽然熟悉一些信令流程，但对每条信令内的东西了解的就不是那么清楚了，那么可以参考这个资料了。
http://item.taobao.com/item.htm?spm=a1z10.1.w1984690173.28.C2DWxH&id=17237702050
或者：
http://shop64829290.taobao.com/
这个价格已经很优惠了，这个信令资料太全面了，讲到了attach过程84条信令（L1L2L3的信令，俱全面）
Basic Call Processing 1
1.1 Full Stack 3
1.1.1 OOverall Sequence and Layer Configuration 3
1.1.2 Downlink Channel Map 5
1.1.3 Uplink Channel Map 7
1.1.4 Channel Mapping Table throughout Call Processing 8
1.2 Basic Call Processing - Typical Packet Call 8
1.2.1 Basic State Machine 9
1.2.2 Big Picture First 10
1.2.3 Channel Mapping Table throughout Call Processing 14
1.2.4 Cell Configuration and Channel Configuration during Call Processing 15
1.2.5 Now in Very Detailed Picture 16
1.2.6 Overall Comparision with WCDMA 19
1.2.7 1) MIB 20
1.2.8 2) SIB 1 20
1.2.9 3) SIB 2 22
1.2.10 4) RRC : PRACH Preamble / 5) RRC : RACH Response 24
1.2.11 Interim Comments 24
1.2.12 6) RRC : RRC Connection Request 25
1.2.13 7) RRC : RRC Connection Setup 25
1.2.14 8) RRC : RRC Connection Setup Complete + NAS : Attach Request + ESM : PDN Connectivity Request 28
1.2.15 9) RRC : DL Information Transfer + NAS : Authentication Request 34
1.2.16 10) RRC : UL Information Transfer + NAS : Authentication Response 34
1.2.17 11) RRC : DL Information Transfer + NAS : Security Mode Command 36
1.2.18 12) RRC : UL Information Transfer + NAS : Security Mode Complete 38
1.2.19 13) RRC : Security Mode Command 38
1.2.20 14) RRC : Security Mode Complete 39
1.2.21 15) RRC : RRC Connection Reconfiguration + NAS : Attach Accept + NAS : Activate Default EPS Bearer Context Request 39
1.2.22 16) RRC : RRC Connection Reconfiguration Complete + NAS : AttachComplete + ESM : Activate Default EPS Bearer Context Accept 50
1.2.23 20) RRC : RRC Connection Request 51
1.2.24 21) RRC : RRC Connection Setup 52
1.2.25 22) RRC : RRC Connection Setup Complete + NAS : Service Request 52
1.2.26 23) RRC : Security Mode Command 52
1.2.27 24) RRC : Security Mode Complete 53
1.2.28 25) RRC : RRC Connection Reconfiguration + NAS : Activate Dedicated EPS Bearer Context Request 53
1.2.29 26) RRC : RRC Connection Reconfiguration Complete + NAS : Activate Dedicated EPS Bearer Context Accept 58
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