A.步驟1.傳輸前導(dǎo)序列 B.步驟2.隨機(jī)接入響應(yīng) C.步驟3.發(fā)送Layer2/Layer3消息 D.步驟4.發(fā)送競爭方式?jīng)Q議消息
A.1ms B.4ms C.6ms D.10ms
A.4096 B.5120 C.6144 D.7168