Abstract: Disclosed is a portable first-aid anti-asphyxiation device that automatically takes foreign matter from a respiratory airway, relating to medical care supplies. It generates suction force automatically by pressing the trigger button. The device is operated easily. The obstructions in the airway can be eliminated quickly. Since the suction force is controlled by the spring inside the device and the stops on the piston rod, the structure of the device is simple. The device generates the same force each time. The suction force may not be variable due to manual operation. Compared to the devices on the market that requires a person to operate with both hands, the device of the present disclosure is safer, can be operated easily, and can generate stable results.

Abstract: A novel LPWAN technology includes a ZCNET node that transmit signals that occupy a very small fraction of the signal space, resulting in very low collision probabilities. ZCNET supports parallel root channels within a single frequency channel by using Zadoff-Chu (ZC) root sequences. The root channels do not severely interfere with each other, because the interference power is spread evenly over the entire signal space. ZCNET has its node randomly choose the transmission channel and range, while still achieving high packet receiving ratios such as 0.9 or above, because the load in each root channel is small.

Abstract: Provided are methods and apparatus for recovering collided packets in a wireless network, as well as for implementing block-based error correction techniques. In an example, provided is a method to recover collided packets by (A) assigning a peak of a collided packet to a respective packet by calculating a matching cost, per collided packet, from an amplitude of the peak and a time when the peak occurred, where the matching cost is determined from a combination of per-collided packet parameters including (i) respective estimated symbol boundaries of the collided packets, (ii) respective estimated Carrier Frequency Offsets of the collided packets, and (iii) a peak amplitude history of prior packets received from wireless network nodes, and (B) assigning, based on a respective packet in the collided packets having the parameters producing a lowest matching cost among the calculated matching costs, the peak to the respective packet.

Abstract: A novel LPWAN technology includes a ZCNET node that transmit signals that occupy a very small fraction of the signal space, resulting in very low collision probabilities. ZCNET supports parallel root channels within a single frequency channel by using Zadoff-Chu (ZC) root sequences. The root channels do not severely interfere with each other, because the interference power is spread evenly over the entire signal space. ZCNET has its node randomly choose the transmission channel and range, while still achieving high packet receiving ratios such as 0.9 or above, because the load in each root channel is small.

Abstract: A novel LPWAN technology includes a ZCNET node that transmit signals that occupy a very small fraction of the signal space, resulting in very low collision probabilities. ZCNET supports parallel root channels within a single frequency channel by using Zadoff-Chu (ZC) root sequences. The root channels do not severely interfere with each other, because the interference power is spread evenly over the entire signal space. ZCNET has its node randomly choose the transmission channel and range, while still achieving high packet receiving ratios such as 0.9 or above, because the load in each root channel is small.

Abstract: This disclosure describes a novel PRACH scheme based on an Analog Bloom Filter, in which user equipment is allowed to transmit multiple sequences to a base station, instead of only one sequence as is the case with the current LTE. A new decoding algorithm is disclosed, which copes with the unique challenges in the signal generated with ZC sequences, such as peak shifting and multiple peaks. In addition, when CFO can be removed the new scheme allows the UE to piggyback log 2 ? ? 7 bits of information along with the signal. Evaluation shows that the new scheme outperforms the existing PRACH of LTE by more than an order of magnitude in many cases, and therefore is a good candidate as the PRACH for future wireless networks (e.g., 5G).

Abstract: A novel LPWAN technology includes a ZCNET node that transmit signals that occupy a very small fraction of the signal space, resulting in very low collision probabilities. ZCNET supports parallel root channels within a single frequency channel by using Zadoff-Chu (ZC) root sequences. The root channels do not severely interfere with each other, because the interference power is spread evenly over the entire signal space. ZCNET has its node randomly choose the transmission channel and range, while still achieving high packet receiving ratios such as 0.9 or above, because the load in each root channel is small.

Abstract: Provided herein are systems and devices capable of detecting an event, such as the fall of a human. The devices may include a motion sensor, a heat sensor, and a vibration sensor. The devices and systems also may include an alarm and/or communication device configured to function when the event occurs.

Abstract: This disclosure describes a novel PRACH scheme based on an Analog Bloom Filter, in which user equipment is allowed to transmit multiple sequences to a base station, instead of only one sequence as is the case with the current LTE. A new decoding algorithm is disclosed, which copes with the unique challenges in the signal generated with ZC sequences, such as peak shifting and multiple peaks. In addition, when CFO can be removed the new scheme allows the UE to piggyback log 2 7 bits of information along with the signal. Evaluation shows that the new scheme outperforms the existing PRACH of LTE by more than an order of magnitude in many cases, and therefore is a good candidate as the PRACH for future wireless networks (e.g., 5G).

Abstract: Provided herein are systems and devices capable of detecting an event, such as the fall of a human. The devices may include a motion sensor, a heat sensor, and a vibration sensor. The devices and systems also may include an alarm and/or communication device configured to function when the event occurs.

Abstract: A system and method for the efficient compression of the Channel State Information (CSI) in a wireless network with very low complexity and implementation cost. In accordance with the present invention, the CSI can be approximated as the summation of very few sinusoids on constant frequencies and the parameters of the sinusoids can be found efficiently by very simple calculations such as dot products of vectors which are implementable in hardware at very low cost.

Abstract: L2Relay is a novel packet relay protocol for Wi-Fi networks that can improve the performance and extend the range of the network. A device running L2Relay is referred to as a relayer, which overhears the packet transmissions and retransmits a packet on behalf of the Access Point (AP) or the node if no acknowledgement is overheard. L2Relay is ubiquitously compatible with all Wi-Fi devices. L2Relay is designed to be a layer 2 solution that has direct control over many layer 2 functionalities such as carrier sense. Unique problems are solved in the design of L2Relay including link measurement, rate adaptation, and relayer selection. L2Relay was implemented in the OpenFWWF platform and compared against the baseline without a relayer as well as a commercial Wi-Fi range extender. The results show that L2Relay outperforms both compared schemes.

Abstract: L2Relay is a novel packet relay protocol for Wi-Fi networks that can improve the performance and extend the range of the network. A device running L2Relay is referred to as a relayer, which overhears the packet transmissions and retransmits a packet on behalf of the Access Point (AP) or the node if no acknowledgement is overheard. L2Relay is ubiquitously compatible with all Wi-Fi devices. L2Relay is designed to be a layer 2 solution that has direct control over many layer 2 functionalities such as carrier sense. Unique problems are solved in the design of L2Relay including link measurement, rate adaptation, and relayer selection. L2Relay was implemented in the OpenFWWF platform and compared against the baseline without a relayer as well as a commercial Wi-Fi range extender. The results show that L2Relay outperforms both compared schemes.

Abstract: The present embodiments provide a mechanism for selecting from among a plurality of initialization sequences to be executed as part of system startup. The present embodiments thus address the problem of certain initialization sequences not executing because they apply to the same function as another initialization sequence that is positioned ahead of the subject initialization sequence in storage of an adapter.