公开(公告)号：DE69629342T2

公开(公告)日：2004-08-19

申请号：DE69629342

申请日：1996-04-10

Applicant: MOTOROLA INC

Inventor： SCHMIDT CHRIS ,  KOTZIN D ,  MENICH J ,  BRUCKERT J

IPC: H04B7/26 ,  H04W36/12 ,  H04W36/18 ,  H04Q7/22

Abstract: A method of communication handover from a first communication entity (33) to a second communication entity (43) in a communication system (10) where a communication unit (80), communicating with a transceiver (23) associated with the second communication entity, is linked to the first communication entity. The invention provides for establishing a communication link between the communication unit and the second communication entity while maintaining a communication link between the communication unit and the first communication entitiy. Then, communications are substantially simultaneously transfered to the second communication entity while terminated from the first communication entity.

公开(公告)号：DE69736782T2

公开(公告)日：2007-01-18

申请号：DE69736782

申请日：1997-12-19

Applicant: MOTOROLA INC

Inventor： BRUCKERT J ,  KOTZIN D ,  HUNG NELSON

IPC: H04K1/10 ,  H04W36/18 ,  H04W72/04

Abstract: In a communication system where frame boundaries for the discrete frames for different users may be offset relative to one another, assignment of a remote unit (125) to a particular frame offset occurs by a processor (321) determining a frame offset belonging to a group that is the least busy group of all possible groups. In addition, during handoff of the remote unit (125) from a serving base station (130) to a neighboring base station, the remote unit (125) is attempted to be kept within the same call group, however should the same call group of the neighboring base station be filled, the remote unit (125) is placed in a second call group that is one call group prior to the current call group.

公开(公告)号：DE69636386D1

公开(公告)日：2006-09-07

申请号：DE69636386

申请日：1996-12-13

Applicant: MOTOROLA INC

Inventor： KOTZIN D ,  SCHAEFFER R ,  CSAPO S ,  THOMPSON J ,  SPEAR L

IPC: H04B7/26 ,  H04W36/04

Abstract: A wireless communication system (200, 300, 400, 500) mitigates the effects of excess timing delay caused by varying lengths of communication paths. In one general implementation, a transition communication path (206, 323, 329) is used to transfer a time-advanced version of a timing reference signal so that the cumulative time delay at a transition cell (209, 325, 331) is reduced. In another general implementation, the timing reference signal is time-advanced in all communication paths (403-411), and selected communication paths (403-407) include a time delay means (423-427, 503-507) such that the cumulative time delay at an area (421) near a target coverage area (130) is reduced. By reducing the cumulative time delay at the area (421) near the target coverage area (130), a handoff of a communication of a mobile station (128) into the target coverage area (130) can be performed.

公开(公告)号：DE69736782D1

公开(公告)日：2006-11-16

申请号：DE69736782

申请日：1997-12-19

Applicant: MOTOROLA INC

Inventor： BRUCKERT J ,  KOTZIN D ,  HUNG NELSON

IPC: H04K1/10 ,  H04W36/18 ,  H04W72/04

Abstract: In a communication system where frame boundaries for the discrete frames for different users may be offset relative to one another, assignment of a remote unit (125) to a particular frame offset occurs by a processor (321) determining a frame offset belonging to a group that is the least busy group of all possible groups. In addition, during handoff of the remote unit (125) from a serving base station (130) to a neighboring base station, the remote unit (125) is attempted to be kept within the same call group, however should the same call group of the neighboring base station be filled, the remote unit (125) is placed in a second call group that is one call group prior to the current call group.

公开(公告)号：DE69831358T2

公开(公告)日：2006-03-09

申请号：DE69831358

申请日：1998-11-13

Applicant: MOTOROLA INC

Inventor： BRUCKERT J ,  KOTZIN D

IPC: H04J13/00 ,  H04B7/216 ,  H04B7/26 ,  H04W36/12 ,  H04W36/18

Abstract: A method and system for facilitating a handoff of a remote mobile unit in a communication system 12 having a plurality of base stations (16 and 22), employs base stations (16 and 22) along a coverage area seam (10) that have a soft handoff subsystem (24) collocated with conventional base station circuitry (44) to facilitate soft handoff. The soft handoff subsystem (24) includes a transceiver (36) for generating and receiving a first group of dedicated soft handoff channels that are an orthogonally related subset of a separate second group of spread spectrum coded traffic channels wherein the soft handoff subsystem is under control of the source base station controller (14). The dedicated soft handoff channels are assigned to a specified source base station (16). Preferably the soft handoff subsystem (24) generates only the first group of dedicated soft handoff channels without pilot channels or synchronization channels.

公开(公告)号：DE69629342D1

公开(公告)日：2003-09-11

申请号：DE69629342

申请日：1996-04-10

Applicant: MOTOROLA INC

Inventor： SCHMIDT CHRIS ,  KOTZIN D ,  MENICH J ,  BRUCKERT J

IPC: H04B7/26 ,  H04W36/12 ,  H04W36/18 ,  H04Q7/22

Abstract: A method of communication handover from a first communication entity (33) to a second communication entity (43) in a communication system (10) where a communication unit (80), communicating with a transceiver (23) associated with the second communication entity, is linked to the first communication entity. The invention provides for establishing a communication link between the communication unit and the second communication entity while maintaining a communication link between the communication unit and the first communication entitiy. Then, communications are substantially simultaneously transfered to the second communication entity while terminated from the first communication entity.

公开(公告)号：DE69428424D1

公开(公告)日：2001-10-31

申请号：DE69428424

申请日：1994-07-07

Applicant: MOTOROLA INC

Inventor： MEIDAN REUVEN ,  KOTZIN D ,  RABE CARL

IPC: H04L27/10 ,  F02B3/06 ,  F02F1/16 ,  F02F11/00 ,  H04B1/713 ,  H04B1/7156 ,  H04B7/208 ,  H04B7/26 ,  H04L27/18 ,  H04W48/12 ,  H04L27/30

公开(公告)号：DE69327570D1

公开(公告)日：2000-02-17

申请号：DE69327570

申请日：1993-06-09

Applicant: MOTOROLA INC

Inventor： KOTZIN D ,  SPEAR L

IPC: H04B1/713 ,  H04B1/7136 ,  H04L27/30 ,  H04B7/26

Abstract: A base-site (304) combines baseband frequency hopping and fast-synthesizer hopping to produce an economical frequency hopping communication system (300). The base-site (304) combines the fast-synthesizer frequency hopping capability of transmitters (307-309) with baseband frequency hopping to produce a frequency hopping communication system (300) which serves the same number of subscribers served by transmitters (208-213) in a purely baseband hopping communication system (200), but with fewer transmitters (307-309). The implementation of frequency-selective cavities (312-317) having very low loss eliminates the need for wideband hybrid combiners (112-114), which in turn eliminates transmitted-signal power loss experienced in a purely fast-synthesizer frequency hopping communication system (100).

公开(公告)号：DE69636386T2

公开(公告)日：2006-11-30

申请号：DE69636386

申请日：1996-12-13

Applicant: MOTOROLA INC

Inventor： KOTZIN D ,  SCHAEFFER R ,  CSAPO S ,  THOMPSON J ,  SPEAR L

IPC: H04B7/26 ,  H04W36/04

Abstract: A wireless communication system (200, 300, 400, 500) mitigates the effects of excess timing delay caused by varying lengths of communication paths. In one general implementation, a transition communication path (206, 323, 329) is used to transfer a time-advanced version of a timing reference signal so that the cumulative time delay at a transition cell (209, 325, 331) is reduced. In another general implementation, the timing reference signal is time-advanced in all communication paths (403-411), and selected communication paths (403-407) include a time delay means (423-427, 503-507) such that the cumulative time delay at an area (421) near a target coverage area (130) is reduced. By reducing the cumulative time delay at the area (421) near the target coverage area (130), a handoff of a communication of a mobile station (128) into the target coverage area (130) can be performed.

公开(公告)号：DE69831358D1

公开(公告)日：2005-09-29

申请号：DE69831358

申请日：1998-11-13

Applicant: MOTOROLA INC

Inventor： BRUCKERT J ,  KOTZIN D

IPC: H04J13/00 ,  H04B7/216 ,  H04W36/12 ,  H04W36/18 ,  H04Q7/38 ,  H04B7/26

Abstract: A method and system for facilitating a handoff of a remote mobile unit in a communication system 12 having a plurality of base stations (16 and 22), employs base stations (16 and 22) along a coverage area seam (10) that have a soft handoff subsystem (24) collocated with conventional base station circuitry (44) to facilitate soft handoff. The soft handoff subsystem (24) includes a transceiver (36) for generating and receiving a first group of dedicated soft handoff channels that are an orthogonally related subset of a separate second group of spread spectrum coded traffic channels wherein the soft handoff subsystem is under control of the source base station controller (14). The dedicated soft handoff channels are assigned to a specified source base station (16). Preferably the soft handoff subsystem (24) generates only the first group of dedicated soft handoff channels without pilot channels or synchronization channels.