Abstract: The present disclosure provides a DC mechanical circuit breaker that can utilize two switches, one of which can generate zero-crossing with an alternate oscillatory circuit for the other one, which can be a conventional zero-crossing-based AC breaker and can be used in the main circuit. This is different from the conventional single-switch commute-and-absorb method currently used. The present disclosure shows that disclosed circuit breaker improves the fault current extinction and significantly reduces the voltage rate-of-change while creating the current zero-crossing faster compared to the available technology. Thus, disclosed circuit breaker is capable of interrupting high DC currents with minimal arc through a less expensive AC circuit breaker. Simulation and hardware results are provided to show the efficiency of the disclosed circuit breaker.

Abstract: Various aspects of the subject technology relate to systems, methods, and machine-readable media for cross-platform programmable network communication. The method includes receiving, at a network toolchain, instructions for network hardware of a radio access network (RAN), the instructions comprising a domain specific language for the RAN. The method also includes determining through the network toolchain an architectural model for the network hardware, the architectural model comprising network patterns of the network hardware. The method also includes generating, by the network toolchain, translated instructions based on the instructions, the translated instructions comprising a configuration and control layer (CCL) code. The method also includes sending the CCL code to the network hardware. The method also includes executing the CCL code by the network hardware. The method also includes causing the network hardware to perform a network function based on execution of the CCL code.

Abstract: A DC circuit breaker system includes a first mechanical switch, a first parallel capacitor connecting a first terminal and a second terminal of the first mechanical switch, a second mechanical switch in series with the first mechanical switch, a second parallel capacitor connecting a first terminal and a second terminal of the second mechanical switch, a first diode connecting the first terminal and the second terminal; and a second diode connecting the first terminal and the second terminal. The first mechanical switch separates contacts in response to a fault current; the second mechanical switch separates contacts in response to the fault current; and opening the first and second mechanical switches and turning off the first and second diodes reverses current flow and clears a current fault. The DC circuit breaker system may also be equipped with a surge arrestor at its input and a freewheeling diode at its output.

Abstract: An embodiment of a DC circuit breaker system includes a first mechanical switch, a first parallel capacitor connecting a first terminal and a second terminal of the first mechanical switch, a second mechanical switch in series with the first mechanical switch, a second parallel capacitor connecting a first terminal and a second terminal of the second mechanical switch, a first diode connecting the first terminal and the second terminal; and a second diode connecting the first terminal and the second terminal. According to the present disclosure, the first mechanical switch initiates a separation of contacts in response to a fault current; the second mechanical switch initiates a separation of contacts in response to the fault current; and opening of the first and second mechanical switches and turning off of the first and second diodes reverse a direction of a current flow and clear a current fault.

Abstract: Various aspects of the subject technology relate to systems, methods, and machine-readable media for cross-platform programmable network communication. The method includes receiving, at a network toolchain, instructions for network hardware of a radio access network (RAN), the instructions comprising a domain specific language for the RAN. The method also includes determining through the network toolchain an architectural model for the network hardware, the architectural model comprising network patterns of the network hardware. The method also includes generating, by the network toolchain, translated instructions based on the instructions, the translated instructions comprising a configuration and control layer (CCL) code. The method also includes sending the CCL code to the network hardware. The method also includes executing the CCL code by the network hardware. The method also includes causing the network hardware to perform a network function based on execution of the CCL code.

Abstract: The present disclosure provides a DC mechanical circuit breaker that can utilize two switches, one of which can generate zero-crossing with an alternate oscillatory circuit for the other one, which can be a conventional zero-crossing-based AC breaker and can be used in the main circuit. This is different from the conventional single-switch commute-and-absorb method currently used. The present disclosure shows that disclosed circuit breaker improves the fault current extinction and significantly reduces the voltage rate-of-change while creating the current zero-crossing faster compared to the available technology. Thus, disclosed circuit breaker is capable of interrupting high DC currents with minimal arc through a less expensive AC circuit breaker. Simulation and hardware results are provided to show the efficiency of the disclosed circuit breaker.

Abstract: Various aspects of the subject technology relate to systems, methods, and machine-readable media for cross-platform programmable network communication. The method includes receiving, at a network toolchain, instructions for network hardware of a radio access network (RAN), the instructions comprising a domain specific language for the RAN. The method also includes determining through the network toolchain an architectural model for the network hardware, the architectural model comprising network patterns of the network hardware. The method also includes generating, by the network toolchain, translated instructions based on the instructions, the translated instructions comprising a configuration and control layer (CCL) code. The method also includes sending the CCL code to the network hardware. The method also includes executing the CCL code by the network hardware. The method also includes causing the network hardware to perform a network function based on execution of the CCL code.

Abstract: The present disclosure provides a DC mechanical circuit breaker that can utilize two switches, one of which can generate zero-crossing with an alternate oscillatory circuit for the other one, which can be a conventional zero-crossing-based AC breaker and can be used in the main circuit. This is different from the conventional single-switch commute-and-absorb method currently used. The present disclosure shows that disclosed circuit breaker improves the fault current extinction and significantly reduces the voltage rate-of-change while creating the current zero-crossing faster compared to the available technology. Thus, disclosed circuit breaker is capable of interrupting high DC currents with minimal arc through a less expensive AC circuit breaker. Simulation and hardware results are provided to show the efficiency of the disclosed circuit breaker.

Abstract: The present disclosure provides a DC mechanical circuit breaker that can utilize two switches, one of which can generate zero-crossing with an alternate oscillatory circuit for the other one, which can be a conventional zero-crossing-based AC breaker and can be used in the main circuit. This is different from the conventional single-switch commute-and-absorb method currently used. The present disclosure shows that disclosed circuit breaker improves the fault current extinction and significantly reduces the voltage rate-of-change while creating the current zero-crossing faster compared to the available technology. Thus, disclosed circuit breaker is capable of interrupting high DC currents with minimal arc through a less expensive AC circuit breaker. Simulation and hardware results are provided to show the efficiency of the disclosed circuit breaker.

Abstract: Techniques are disclosed for estimating a surrounding in which a mobile device is situated based on sensors of the mobile device. The sensors can be typical sensors currently existing on mobile devices and not dedicated for surrounding detection purposes. One embodiment includes a method which comprises retrieving a weather condition from a remote server; deriving, based on the weather condition, a plurality of weights for sensors on the mobile device; applying each weight to an output of a corresponding sensor on the mobile device; and determining whether the mobile device is likely to be indoor or outdoor based on one or more weighted outputs from the sensors. Among other advantages, embodiments disclosed herein increased accuracy to estimate the mobile device's surrounding without the need of dedicated sensors or other modification to mobile network infrastructures, thereby providing the benefit of surrounding sensing without incurring the cost.

Abstract: Techniques are disclosed for estimating a surrounding in which a mobile device is situated based on sensors of the mobile device. The sensors can be typical sensors currently existing on mobile devices and not dedicated for surrounding detection purposes. One embodiment includes a method which comprises retrieving a weather condition from a remote server; deriving, based on the weather condition, a plurality of weights for sensors on the mobile device; applying each weight to an output of a corresponding sensor on the mobile device; and determining whether the mobile device is likely to be indoor or outdoor based on one or more weighted outputs from the sensors. Among other advantages, embodiments disclosed herein increased accuracy to estimate the mobile device's surrounding without the need of dedicated sensors or other modification to mobile network infrastructures, thereby providing the benefit of surrounding sensing without incurring the cost.

Abstract: A communication system having a first communication device being in communication with a second communication device via a communication connectivity to a first communication network. The first communication device having a first handover module operable to handover communication connectivity from the first communication network to a second communication network. The second communication device having a second handover module cooperatively operable with the first handover module to maintain communication between the second communication device and the first communication device while the first handover module operates to handover communication connectivity from the first communication network to the second communication network.