Motorola Corporation

John E Major

Richard A Comroe

Arun Sobti

Gregory B Vatt

Dennis Paul Diekelman

Jaime Andres Borras

Michael D Sasuta

David E Borth

Kenneth J Zdunek

Robert W Furtaw

Janusz Ryszard Hyziak

Daniel J Coombes

William V Braun

James Joseph Mikulski

David E Morgan

Eric K Crane

Robert S Rosenthal

Neil N Wellenstein

Ronald L Scheiderer

Susan M Whitney

Susan M Blackston

Gerald E Pioch

Multiple, different, independent constellations (10, 20) of satellites (2, 21-23) share a portion of a common frequency spectrum such as a single carrier frequency. The satellites' antennas (11) may be either multi-beam or omni-directional, while those of earth stations (13, 14) are directional. When interference occurs between communications of a satellite (31) of a first constellation (10) and a satellite (41) of a second constellation (20), any of several interference-mitigation options may be employed, such as the first satellite (31) handing off communications to a second satellite (32) of the same constellation (10), or temporarily suspending communications. The remedial action may occur in response to either predicted or detected interference.

Independent satellite-based communications systems sharing common

A system (200) and method (300) provide an efficient communication system for distributing digital multimedia/HDTV signals to multimedia units in a cellular pattern. The method includes: 1) using at least a first primary wide area-antenna for, where selected, transmitting a digital multimedia/HDTV signal per frequency allocation over at least a portion of a predetermined reception area, wherein a plurality of patterns of cells tesselates the predetermined reception area; and 2) using cell-site antennas having transmitters, each located in a cell, for, where selected, transmitting, when the primary wide area-antenna is deselected, at least a first preselected digital multimedia/HDTV signal over an area of the cell, for providing the HDTV signal to a plurality of digital receivers in accordance with a predetermined scheme, wherein the digital multimedia/HDTV signal is associated with a predetermined frequency allocation.

Method and system for distribution of wireless digital multimedia

An integrated land mobile dispatch radio capable of accommodating both standard audio transmissions and video transmissions. The push-to-talk switch controls these activities. Video images can be stored and reviewed prior to transmission. Also, video transmissions can be interrupted to accommodate a current need to conduct an audio transmission.

Video/integrated land mobile dispatch radio and video unit

Within a communication system having a plurality of communication system sites, each communication system site has a one cell re-use pattern of a limited number of communication resources. Communication units within the communication system utilize a redundant transmission of information such that the geographic separation of communication system sites utilizing the same communication resources is reduced.

One cell re-use pattern for communication system sites

A personal communicating computer (112) (FIG. 1) remains in contact, via a wireless network, with an office server (101). Documents from various sources can be transmitted to the personal communicating computer (112) using this network. Upon receipt, such documents can be accessed and utilized in a variety of ways. In particular, such documents can be annotated in a variety of ways, and those annotations forwarded on to other destinations for appropriate review and handling.

System for selectively routing and merging independent annotations to a

Independent communication systems are provided with additional receivers that allow the systems to monitor one another's outbound control signalling channels. Secondary control signalling can be interleaved with the primary control signalling information on this communication resource, which secondary control signalling information is intended for reception and use by the monitoring system.

Communication system to communication system communication system

A trunked communication system wherein less than all of the communication units may transmit an identifying data word thereby registering their location to a system controller every time they enter a different coverage area, while the remainder of the communication units do not. The identity of the communication units which operate in each mode is known to the system resource controller in advance. Pre-registration allows the system controller to know the locale of target units in advance when communications to those units is requested. The locale of units that do no pre-register their location are identified through system wide paging. Coordinating the identification of locales of units in both modes permits greater optimization of spectral resources.

Multi-site dispatching system cell registration

An improved communication system is disclosed wherein at least one reprogramming station is added to a communication system. The reprogramming station is constructed and arranged to communicate with the subscriber units thereby either reprogramming or regrouping them. The subscribing units receive the reprogramming command and acknowledge individually, altering a memory means until either reprogrammed back to the original state, or to another state. In another mode, the reprogramming station transmits a regrouping command wherein two or more groups are combined to form a super group.

Growing community of inventors

Barrington, IL, United States of America

John E Major