公开(公告)号：DE3574217D1

公开(公告)日：1989-12-14

申请号：DE3574217

申请日：1985-07-09

Applicant: MOTOROLA INC

Inventor： LABEDZ GERALD ,  BONTA JEFFERY ,  SCHAEFFER DENNIS ,  TELL DANIEL ,  LEV VALY

IPC: H04B7/26 ,  H04B7/00 ,  H04W28/06 ,  H04W36/02 ,  H04W36/08 ,  H04Q7/04

Abstract: A data message transmission system for a cellular radiotelephone system is disclosed. Data to be transmitted is converted into a format compatible with radio transmission prior to transmission. The data is reconverted to its original format following reception. Handoff is accomplished by halting the data transmission prior to handoff and resuming data transmission after handoff. Call supervision occurs via busy-idle bit coding.