Abstract: Embodiments of the present invention provide techniques for registering devices with a distributed antenna system (DAS) and managing access to one or more mobile networks provided through the DAS. The DAS may include a centralized hub that may interface with various base stations to provide one or more mobile networks in a DAS deployment. In some embodiments, the centralized hub may communicate with one or more remote units that convert signals received from the centralized hub to be communicated using one of the distributed antennas. When a device attempts to connect to the mobile network, an access manager in the DAS can determine whether the device can access the mobile network. Access can be determined based on device registration with the DAS. In various embodiments, different service levels may be made available to different users, devices, types of traffic, etc. by the DAS.

Abstract: Embodiments of the present invention provide techniques for managing interference across multiple transceivers in an access point in a network environment. A wireless networking system can include various access points. These access points may each include multiple transceivers. However, with multiple transceivers in close proximity, signals transmitted by one transceiver may interfere with another transceiver through crosstalk, adjacent channel interference, or other form of interference. Each access point may include an interference manager which can use an interference model to modify a signal transmitted by one transceiver to be used to cancel corresponding interference caused in a second transceiver. Interference can be modeled prior to deployment and/or at deployment using a series of test signals transmitted by one transceiver while the corresponding interference is monitored on a second transceiver.

Abstract: Embodiments of the present invention provide techniques for registering devices with a distributed antenna system (DAS) and managing access to one or more mobile networks provided through the DAS. The DAS may include a centralized hub that may interface with various base stations to provide one or more mobile networks in a DAS deployment. In some embodiments, the centralized hub may communicate with one or more remote units that convert signals received from the centralized hub to be communicated using one of the distributed antennas. When a device attempts to connect to the mobile network, an access manager in the DAS can determine whether the device can access the mobile network. Access can be determined based on device registration with the DAS. In various embodiments, different service levels may be made available to different users, devices, types of traffic, etc. by the DAS.

Abstract: Embodiments of the present invention provide techniques for locating network components in a distributed antenna system. A DAS can include various antennas located within a deployment environment. The DAS may include a centralized hub that may interface with various broadband sources and manage access to the broadband sources for devices that connect to the DAS. In some embodiments, the centralized hub may communicate with one or more remote units that convert signals received from the centralized hub to be communicated using one of the distributed antennas. Components of the DAS may be associated with a beacon. The beacon can be configured to determine that the signal has been lost (e.g., due to component failure) and can begin transmitting an identification signal (e.g., a “ping”). The identification signal transmitted by the beacon may then be used to identify the location of the faulty component for servicing.

Abstract: Embodiments of the present invention provide techniques for load balancing in a network environment. A wireless networking system can include a load balancer to determine how to distribute client devices across available channels to minimize interference and maximize bandwidth. A client device can access a wireless network through an access point. When a request is received from the client device to access the wireless network, the wireless networking system can determine device information associated with the device. For example, the request can include a device identifier. In some embodiments, account information, such as a user name and password, may be included with the request or received in response to a log-in prompt. In some embodiments connection information may also be determined. Based on the device information and the connection information, the client device can be assigned to a channel.

Abstract: Embodiments of the present invention provide techniques for power management in a network environment. A wireless networking system can include various access points in different areas of a deployment environment. Each access point may include a power manager which determines a transmission power for the access point to minimize interference with neighboring access points. The power manager can determine zones associated with each access point based on the signal strength of devices within those zones and assign each zone to a separate channel. When a request is received from a client device to access the wireless network, the client device can be assigned to a channel based on connection information associated with the client device, such as signal strength or error rate. The connection information of each client device can be monitored periodically and the client devices can be reassigned to different channels based on changes to the connection information.

Abstract: Embodiments of the present invention provide techniques for managing interference across multiple transceivers in an access point in a network environment. A wireless networking system can include various access points. These access points may each include multiple transceivers. However, with multiple transceivers in close proximity, signals transmitted by one transceiver may interfere with another transceiver through crosstalk, adjacent channel interference, or other form of interference. Each access point may include an interference manager which can use an interference model to modify a signal transmitted by one transceiver to be used to cancel corresponding interference caused in a second transceiver. Interference can be modeled prior to deployment and/or at deployment using a series of test signals transmitted by one transceiver while the corresponding interference is monitored on a second transceiver.

Abstract: A method for cutting steel includes heating a portion of the steel until it is molten, positioning a cutting torch to have a high angle of incidence relative to the molten steel, and blasting high pressure oxygen at the molten metal. The blast of high pressure oxygen further heats the molten metal and blows the molten metal away from the steel to create a cutting trench. The cutting torch is then moved generally parallel to the cutting method includes a cutting torch that emits a high pressure combustible gas and a high pressure combustion enhancing gas. The torch directs the high pressure gases at the steel so that the gases hit the steel at an acute angle of attack. An automated device propels the torch in the general direction of the desired cut. The resultant cut metal product has at least one edge with a grain pattern that is not perpendicular to the direction of cut.

Abstract: A method for cutting steel includes heating a portion of the steel until it is molten, positioning a cutting torch to have a high angle of incidence relative to the molten steel, and blasting hgih pressure oxygen at the molten metal. The blast of high pressure oxygen further heats the molten metal and blows the molten metal away from the steel to create a cutting trench. The cutting torch is then moved generally parallel to the cutting method includes a cutting torch that emits a high pressure combustible gas and a high pressure combustion enhancing gas. The torch directs the high pressure gases at the steel so that the gases hit the steel at an acute angle of attack. An automated device propels the torch in the general direction of the desired cut. The resultant cut metal product has at least one edge with a grain pattern that is not perpendicular to the direction of cut.