| EXTENET SYSTEMS, INC. Patent applications |
| Patent application number | Title | Published |
|---|
| 20110028161 | Real-Time Location Determination For In-Building Distributed Antenna Systems - A system for determining the location of a wireless mobile device with respect to an interconnected network of wireless transmission waveguides is disclosed. The interconnected network could be interconnected ducts of an HVAC system in a building. Multiple wireless probes are placed at multiple locations within the HVAC duct system (or similar interconnected network of waveguides). Each probe may detect a common signal from a wireless mobile device and independently preserve arrival time information of the detected signal, wherein the signal propagates to probes by way of a free-space path to an opening in one or another duct, and thereafter to the probes via one or another path through the interconnected ducts, which act as wireless transmission waveguides. By correlating timing information of a signal received at three or more probes, a location of the mobile wireless device may be determined by one or another form of triangulation. | 02-03-2011 |
| 20110028157 | Real-Time Location Determination For In-Building Distributed Antenna Systems - A system for determining the location of a wireless mobile device with respect to an interconnected network of wireless transmission waveguides is disclosed. The interconnected network could be interconnected ducts of an HVAC system in a building. Multiple wireless probes are placed at multiple locations within the HVAC duct system (or similar interconnected network of waveguides). Each probe may detect a common signal from a wireless mobile device and independently preserve arrival time information of the detected signal, wherein the signal propagates to probes by way of a free-space path to an opening in one or another duct, and thereafter to the probes via one or another path through the interconnected ducts, which act as wireless transmission waveguides. By correlating timing information of a signal received at three or more probes, a location of the mobile wireless device may be determined by one or another form of triangulation. | 02-03-2011 |
| 20100296816 | Flexible Distributed Antenna System - An apparatus and method for implementing a flexible distributed antenna system (DAS) head end are disclosed. A flexible DAS head end includes an RF conditioning module configured to be connected to one or more base station transceiver (BTS) devices and one or more low-power RF modules that are also part of the flexible DAS head end. In an example embodiment, the flexible DAS head end receives high-power digital-RF passband transmissions from its connections to the one or more BTS devices, and low-power digital-RF passband signals from the one or more low-power RF modules. The low-power RF modules, in turn, can receive input baseband signals from one or more baseband units (BBUs) in a wireless network, and then convert the input signals to the lo low-power digital-RF passband signals. The RF conditioning module constructs one or more superposition RF signals from the passband signals, and routes and transmits them to an array of antenna nodes. | 11-25-2010 |
