LTE MAC RA过程初始阶段的有关问题

LTE MAC RA过程初始阶段的问题
初始前要获得一些信息

下面这个信息中文叫什么 ?字面翻译很别扭
the preamble format based offset DELTA_PREAMBLE

另外，
if Random Access Preambles group B exists, the thresholds(临界值), messagePowerOffsetGroupB and messageSizeGroupA, the configured UE transmitted power, PCMAX [10], and the offset between the preamble and Msg3, deltaPreambleMsg3, that are required for selecting one of the two groups of Random Access Preambles.


这的 the offset between the preamble and Msg3, deltaPreambleMsg3 是同一个东西还是不同的东西 ？


谢谢

[解决办法]