Following is an example of Full RACH process with a commercialized LTE device and LTE Network Emulator. I would not explain anything in detail. Just check if the following diagram make any sense to you. If it does, I would say you understand all the details that I explained above.
Following is an example of real RACH procedure happening between a UE and Amarisoft OTS. Log shown here is a screencapture of Amarisoft Web Logging tool.
转载自:http://www.sharetechnote.com/html/RACH_LTE.html