公开(公告)号：US20170325268A1

公开(公告)日：2017-11-09

申请号：US15659909

申请日：2017-07-26

Applicant: Futurewei Technologies, Inc.

Inventor： Bin Liu ,  Yongbo Zeng ,  Jian Wang ,  Guorong Li ,  Yu Cai

IPC: H04W74/08 ,  H04W72/04

CPC classification number: H04W74/0833 ,  H04W72/0413 ,  H04W74/0841

Abstract: A method of performing a random access procedure includes randomly selecting a backoff time from within a backoff window ranging from o to a specified multiple of a random access preamble unit, waiting until a time initialized with the backoff time expires, and retransmitting a random access preamble.