Matches 1 - 17 out of 17
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7321572 Frame relay protocol-based multiplex switching scheme for satellite mesh network  
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
6771617 Frame relay protocol-based multiplex switching scheme for satellite mesh network  
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
6625130 Frame relay protocol-based multiplex switching scheme for satellite mesh network  
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
6496220 Method and arrangement for driving door installations as a function of the presence of persons  
The invention relates to a method and an arrangement for driving door installations as a function of the presence of person wherein the region of the door installation is continuously observed by...
6381227 Frame relay protocol-based multiplex switching scheme for satellite mesh network  
A frame relay protocol-based earth station interface architecture provides full mesh connectivity for a relatively small number of network stations. The fundamental component of the architecture is...
6377561 Data communication satellite system and method of carrying multi-media traffic  
A satellite data communication system and method of operating the same is disclosed. The satellite data communication system provides switched transport services for multi-media networks, wherein...
EP0853299A2 Method and device for actuating a door assembly in response to the presence of persons  
The method is used to control door entry systems in dependence on the presence of objects/persons. The area of the entry system (1) is continuously monitored by at least one video camera (8). The...
5717686 Cellular spacecraft TDMA communications system with call interrupt coding system for maximizing traffic throughput  
Improved throughput is provided in a spacecraft TDMA cellular communications system by in-call signalling without the need for flag bits, while still allowing the in-call signaling to be...
EP0528105A1 Picture image monitoring system.  
A picture image monitoring system wherein a change of a picture image of a monitoring object area can be detected automatically with a high degree of accuracy. The picture image monitoring system...
EP0445334A1 Method of intruder detection.  
Using only a video camera (VK) and a video image processing unit (VVE), which, by a differential imaging process applied to two temporally offset video images, recognises objects (O), a...
4625308 All digital IDMA dynamic channel allocated satellite communications system and method  
An all digital TDMA dynamic channel allocated satellite communications system and method provides a satellite communications network between geographically separated nodes. The topology of the...
4495619 Transmitter and receivers using resource sharing and coding for increased capacity  
The present invention relates to transmitters and receivers in a digital time division multiple access (TDMA) communication system wherein the resource sharing concept is generalized by fully...
4309764 Technique for increasing the rain margin of a satellite communication system  
The present invention relates to a technique for increasing the rain margin at ground stations of a satellite communication system. In the present technique, spare TDMA time slots in each frame...
4301533 Technique for increasing the rain margin of a TDMA satellite communication system  
The present invention relates to a technique for increasing the rain margin of a satellite communication system which includes a satellite capable of transmitting multiple concurrent beams...
RE28577 Channel reallocation system and method  
In a time division multiple access communications system having multiple ground stations and a satellite for communicating signals between ground stations, the channels are periodically reallocated...
3806879 TDMA SATELLITE COMMUNICATION SYSTEM WITH MULTI-PCM FRAMES PER TDMA FRAME  
In a satellite transponder communications system operating in a time division multiple access mode, each earth station transmits data in a burst format. All bursts within a single transponder frame...
3721767 DELAY COMPENSATION IN MULTIPLEX TRANSMISSION SYSTEMS  
A time assignment speech interpolation system is disclosed utilizing time-shared common control processing circuits. Speech signals from a plurality of trunks are interpolated on a lesser plurality...
Matches 1 - 17 out of 17