公开(公告)号：US20150071329A1

公开(公告)日：2015-03-12

申请号：US14025189

申请日：2013-09-12

Applicant: MOTOROLA SOLUTIONS, INC.

Inventor： DUMINDA A. DEWASURENDRA ,  MARK A. BOERGER ,  MAHES M. EKANAYAKE ,  JOHN K. MCKINNEY

IPC: H04B1/7156

CPC classification number: H04B1/7156

Abstract: A wireless method and apparatus for late entry in frequency hopping systems that, during call setup, computes a random permutation sequence through a hop set of frequencies, chooses preamble frequencies to omit data thereon in lieu of preamble data, and swaps frequencies in the random permutation sequence such that synchronization frequencies lie next to the preamble frequencies with an expected delay such that late entrants can join. The wireless method and apparatus meets the FCC requirement of maintaining a pseudorandom hopping pattern and equal distribution of all frequencies in a hop set while guaranteeing late entry and having no effect on battery performance of radios.

Abstract translation: 一种用于在跳频系统中晚进入的无线方法和装置，其在呼叫建立期间通过一组频率计算随机置换序列，选择前导码频率以代替前导码数据省略其上的数据，并交换随机置换中的频率 序列，使得同步频率位于具有预期延迟的前导码频率的旁边，使得晚期进入者可以加入。 该无线方法和装置满足了FCC要求，保证了跳频模式的均匀分布，同时保证了跳频集合中所有频率的均匀分布，同时保证了较晚的进入，并且对电台的电池性能没有影响。