公开(公告)号：MX9306209A

公开(公告)日：1994-05-31

申请号：MX9306209

申请日：1993-10-06

Applicant: MOTOROLA INC

Inventor： BORTH DAVID E ,  HAUG JOHN R ,  RASKI PHILLIP D

IPC: H04W36/14 ,  H04W36/30 ,  H04W48/18 ,  H04W60/00 ,  H04W76/04 ,  H04W92/02 ,  H04M1/00

Abstract: Registration operates by sensing (106) the availability of a first communication system. A quality factor of a channel of the system is measured (111). A channel of the first system is selected if the quality factor of the channel exceeds a threshold (113). If selected, the subscriber attempts to register the call (114). If the registration fails, the availability of a second communication system is sensed (107). A quality factor of a channel of the second system is measured (111) and selected (113), if the quality factor exceeds a threshold. The subscriber will then attempt to register (114) with the second system. Reassignment operates by determining if the first system has reached a capacity limit (126). If it has, it determines if a channel on the second system is available (128). If available, a transfer of the call from the first to the second system will be attempted (132).

公开(公告)号：MX9307019A

公开(公告)日：1994-06-30

申请号：MX9307019

申请日：1993-11-10

Applicant: MOTOROLA INC

Inventor： CHIASSON GREGORY M ,  BORTH DAVID E ,  HAUG JOHN R ,  RASKI PHILLIP D

IPC: H03M13/33 ,  H04B1/40 ,  H04L1/00 ,  H04L7/04 ,  H04B7/00

Abstract: A dual mode radio communication unit for a digital communication system is provided having an error controller including an error detection encoder and a forward error correction encoder which encode an input information signal into an error protected data bit stream. In addition, the communication unit includes a mode selector which enables either the error detection encoder or the forward error correction encoder used with a particular mode of operation of the communication unit. Further, a corresponding dual mode radio communication unit is provided having an error controller for generating estimated information signal samples according to a group of algorithms consisting of either an error detection algorithm or an error correction algorithm. In addition, the corresponding communication unit includes a mode selector for receiving a signal according to a particular one of the group of algorithms which is associated with a particular mode of operation of the corresponding communication unit.