Abstract: In one embodiment, a method includes displaying on a mobile device, a real time view of a user's environment within a building, communicating wirelessly in the building with a location tracking system operable to identify a location of the mobile device relative to one or more elements in the real time view, and displaying a computer generated overlay on the real time view, the overlay including location information associated with the elements.

Abstract: A method for data communication across a layer 2 bridged network having two or more edge nodes configured for receiving and transmitting multiprotocol data packets. The method includes creating a pseudowire circuit across the bridged network, receiving data packets at one of the edge nodes, encapsulating data packets into pseudowire frames, encapsulating the pseudowire frames inside MAC frames, and transmitting the encapsulated frames over the carrier bridged network.

Abstract: A reconfigurable WDM add/drop multiplexer and its method of operation at an add/drop node on an optical fiber carrying a plurality of WDM signals is described. The WDM add/drop multiplexer has a coupler and a demultiplexer element dropping WDM signals from the optical fiber to a plurality of drop terminals, and a wavelength-selective switch adding WDM signals from a plurality of add terminals onto the optical fiber. The coupler splits the WDM signals received from the optical fiber and passes the split WDM signals to the first and second output terminals. The demultiplexer element separates the split WDM signals at the plurality of drop terminals. The wavelength-selective switch, which has an input terminal for connection to the second coupler output terminal and an output terminal for connection to the optical fiber, selectively adds WDM signals on the plurality of add terminals to the optical fiber responsive to control signals.

Abstract: Local rerouting around a failed component link of a link bundle is provided by immediately substituting one or more other component links of the same link bundle. The substitution of component links is performed at the point of failure without signaling to other nodes. This minimizes signaling traffic particularly when large numbers of LSPs are impacted by a single component link failure. Also, since LSP repair can be accomplished very quickly, traffic disruption is minimized.