Abstract: The present invention provides a solar-based multipurpose utility system which is an integrated appliance that uses solar energy to perform various utility functions such as cooking, ice melting, water heating, room heating, and food drying. The phase change material has been used in the system for enhancing the thermal storage capacity of the system. The invention supports the idea of providing wireless remote control for the overall system to the end-user using IoT-based sensors and devices. The system comprises Fresnel lens with cover (21), Fresnel lens (22), ice pot (23), water pipe (24), reflector (25), water storage tank (26), blower (13), phase change material (PCM) filled in evacuated tube arrangement (27), hot air sprayer (28), water filter (15), battery with electronic components (3), water tap (29), temperature and humidity sensor (16), exhaust fan (12), and solar panel (1).

Abstract: Techniques for improving the accuracy of delay line calibration schemes. For example, an amount of offset may be determined between one or more first portions of a first clock signal and one or more second portions of a second clock signal that is delayed relative to the first clock signal. The first portion(s) may correspond to the second portion(s) based at least on the second clock signal being delayed relative to the first clock signal. In some examples, a value may be determined based at least on the amount of offset. The value may correspond to an amount to adjust the first clock signal to reduce the amount of offset. In some examples, a delay line may then be calibrated, based at least on the second value, to adjust the first clock signal.

Abstract: Embodiments of voltage regulators that include a power transistor configured to provide a load current, a voltage follower configured to provide a gate voltage of the power transistor, and a circuit configured to transform the gate voltage of the power transistor into a mirror current of the load current and to adjust a current flow through the voltage follower based on the mirror current.

Abstract: A regulator for a load voltage includes a pass transistor for a load current, a gate voltage sensor coupled to a gate of the pass transistor, and a feed-forward supply noise cancellation circuit configured to amplify a gain of a supply noise cancelling signal at increments of the gate voltage.

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a process may include determining a potential position overlap between a first vehicle and a second vehicle and determining a characteristic of at least one of the first vehicle or the second vehicle based on information from a vehicle-based message. The process may include determining whether the potential position overlap is an actual position overlap between the first vehicle and the second vehicle based on the characteristic.

Abstract: Techniques for improving the accuracy of delay line calibration schemes. For example, an amount of offset may be determined between one or more first portions of a first clock signal and one or more second portions of a second clock signal that is delayed relative to the first clock signal. The first portion(s) may correspond to the second portion(s) based at least on the second clock signal being delayed relative to the first clock signal. In some examples, a value may be determined based at least on the amount of offset. The value may correspond to an amount to adjust the first clock signal to reduce the amount of offset. In some examples, a delay line may then be calibrated, based at least on the second value, to adjust the first clock signal.

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a process may include determining a potential position overlap between a first vehicle and a second vehicle and determining a characteristic of at least one of the first vehicle or the second vehicle based on information from a vehicle-based message. The process may include determining whether the potential position overlap is an actual position overlap between the first vehicle and the second vehicle based on the characteristic.

Abstract: Embodiments include methods performed by a vehicle-to-everything (V2X) system for protecting proprietary data within misbehavior reports. The method includes receiving a misbehavior report from a V2X system participant, obtaining sensor data from the received misbehavior report indicating that a misbehavior condition has occurred, determining whether the sensor data indicating that a misbehavior condition has occurred includes encrypted proprietary information. In response to determining that the sensor data includes encrypted proprietary information, the V2X system identifies an entity that owns the encrypted proprietary information, transmits the misbehavior report including the encrypted proprietary information to the entity that owns the encrypted proprietary information, and receives a confirmation report from the entity that owns the encrypted proprietary information indicating whether the misbehavior report is accurate.

Abstract: Methods, systems, and devices for road usage charging (RUC) are described. RUC computation may be performed at a vehicle using a vehicle computing device (VCD) that is trusted by a service provider, charger, or both. The VCD may be trusted to collect high accuracy, high resolution time and location data for RUC, and also compute for itself what the RUC charge is according to one or more applicable charge policies that are provided to the VCD. Anonymity related to specific vehicle and location information may be provided by encrypting portions of RUC data that are decryptable by different entities with reduced likelihood of revealing specific vehicle, location, and time information.

Abstract: Embodiments include methods performed by vehicle-to-everything (V2X) system for protecting proprietary data within misbehavior reports. Various embodiments may include detecting misbehavior conditions based on received sensor data, determining whether the received sensor data that supports a conclusion that a misbehavior condition has occurred is or includes proprietary information, and encrypting the sensor data that supports the conclusion that the misbehavior condition has occurred in response to determining that the received sensor data is or includes the proprietary information.

Abstract: Embodiments include a memory device with an improved circuit to mitigate degradation of memory devices due to aging. Memory device input/output pins include delay elements for adjusting the delay in each memory input/output signal path to synchronize the input/output signal paths with one another. Certain data patterns, including a long series of logic zero values or a long series of logic one values, can cause asymmetric degradation of transistors included in the delay elements. This asymmetric degradation can reduce the operating frequency of the memory device, leading to lower performance. The disclosed embodiments change the polarity of signals passing through the delay elements to mitigate the effects of asymmetric degradation resulting from these data patterns. As a result, the performance of memory devices is improved relative to prior approaches.

Abstract: Disclosed are systems and techniques for road usage charging. For example, a vehicle (e.g., using a vehicle computing device (VCD)) can receive an encryption key of a first charging entity and determine a first road usage charge associated with the first charging entity based on a first charge policy. The vehicle can determine a total usage charge (based on the first road usage charge) for road usage (e.g., associated with the first charging entity) and can encrypt the total usage charge based on the encryption key. The vehicle can determine information associated with the total usage charge and can encrypt the information associated with the total usage charge based at least in part on the encryption key. The vehicle can transmit the encrypted total usage charge to a first network entity and can transmit the encrypted information to a second network entity for verifying the encrypted total usage charge.

Abstract: Embodiments include a memory device with an improved calibration circuit. Memory device input/output pins include delay lines for adjusting the delay in each memory input/output signal path. The delay adjustment circuitry includes digital delay lines for adjusting this delay. Further, each digital delay line is calibrated via a digital delay line locked loop which enables adjustment of the delay through the digital delay line in fractions of a unit interval across variations due to differences in manufacturing process, operating voltage, and operating temperature. The disclosed techniques calibrate the digital delay lines by measuring both the high phase and the low phase of the clock signal. As a result, the disclosed techniques compensate for duty cycle distortion by combining the calibration results from both phases of the clock signal. The disclosed techniques thereby result in lower calibration error relative to approaches that measure only one phase of the clock signal.

Abstract: Disclosed are systems, apparatuses, processes, and computer-readable media for wireless communications. For example, a process may include determining a potential position overlap between a first vehicle and a second vehicle and determining a characteristic of at least one of the first vehicle or the second vehicle based on information from a vehicle-based message. The process may include determining whether the potential position overlap is an actual position overlap between the first vehicle and the second vehicle based on the characteristic.

Abstract: Methods and devices and systems for implementing the methods for authenticating plaintext and ciphertext in a vehicle-to-everything (V2X) message include generating ciphertext from a plaintext message to be transmitted in a V2X message, generating a hash of the ciphertext and a hash of the plaintext message, generating a digital signature of a concatenation of the hash of the ciphertext and the hash of the plaintext message, and sending to a network node a V2X message that includes the ciphertext, the hash of the plaintext message, and the digital signature. The hash of the plaintext message, and the digital signature may be configured to enable the network node to verify that the V2X endpoint node signed the concatenation.

Abstract: Methods, systems, and devices for road usage charging (RUC) are described. RUC computation may be performed at a vehicle using a vehicle computing device (VCD) that is trusted by a service provider, charger, or both. The VCD may be trusted to collect high accuracy, high resolution time and location data for RUC, and also compute for itself what the RUC charge is according to one or more applicable charge policies that are provided to the VCD. Anonymity related to specific vehicle and location information may be provided by encrypting portions of RUC data that are decryptable by different entities with reduced likelihood of revealing specific vehicle, location, and time information.

Abstract: A form of the invention is applicable for use in conjunction with a security credential management system that produces and manages pseudonym digital certificates issued to vehicles and used by vehicles to establish trust in vehicle-to-vehicle communications, the security credential management system including a pseudonym certificate authority processor entity which issues pseudonym digital certificates to vehicles, a registration authority processor entity that validates, processes and forwards requests for pseudonym digital certificates to the pseudonym certificate authority processor entity, and a misbehavior authority processor entity that receives misbehavior reports from reporter vehicles that include information about the reporter vehicles and suspect misbehaving vehicles and is responsible for producing a list of revoked credentials; the pseudonym certificate processor entity and registration authority processor entity participating in producing linkage values to be contained within the issued pseudon

Abstract: Methods and devices and systems for implementing the methods for authenticating plaintext and ciphertext in a vehicle-to-everything (V2X) message include generating ciphertext from a plaintext message to be transmitted in a V2X message, generating a hash of the ciphertext and a hash of the plaintext message, generating a digital signature of a concatenation of the hash of the ciphertext and the hash of the plaintext message, and sending to a network node a V2X message that includes the ciphertext, the hash of the plaintext message, and the digital signature. The hash of the plaintext message, and the digital signature may be configured to enable the network node to verify that the V2X endpoint node signed the concatenation.

Abstract: Embodiments include methods performed by vehicle-to-everything (V2X) system for protecting proprietary data within misbehavior reports. Various embodiments may include detecting misbehavior conditions based on received sensor data, determining whether the received sensor data that supports a conclusion that a misbehavior condition has occurred is or includes proprietary information, and encrypting the sensor data that supports the conclusion that the misbehavior condition has occurred in response to determining that the received sensor data is or includes the proprietary information.

Abstract: A method for producing linkage values to be contained within pseudonym digital certificates of a security credential management system for connected vehicles, including the following steps: providing a linkage value function that expresses linkage values as a function of a number of input parameters that include a linkage seed input from a pseudonym certificate authority processor entity and a plurality of inputs from a registration authority processor entity including a vehicle identifier and at least one index relating to a time period for the linkage value; producing a Boolean circuit representative of the function for a particular combination of the number of input parameters; and executing a garbled circuit protocol on the Boolean circuit between the registration authority processor entity and the pseudonym certificate authority processor entity, whereby the pseudonym certificate authority processor entity privately derives a linkage value for the particular combination of the number of input parameters.