The Precision Time Protocol (PTP) synchronizes clocks in a network with high precision. The protocol finds use in many areas, such as smart manufacturing, intra-vehicular networks, and critical infrastructure. It becomes clear that striving for security ...

Accurate timekeeping is a critical challenge for many intermittently-powered computing devices. Current approaches to keeping time across power failures provide either limited resolution or require additional hardware. We would like to introduce one ...

Being able to measure time, whether directly or indirectly, is a significant advantage for an organism. It allows for timely reaction to regular or predicted events, reducing the pressure for fast processing of sensory input. Thus, clocks are ubiquitous ...

In systems with non-volatile main memories (NVMMs), programmers must carefully control the order in which writes become persistent. Otherwise, what will remain in persistence after a crash may be unusable upon recovery. Prior art has already explored ...

Nakano's later modality can be used to specify and define recursive functions which are causal or synchronous; in concert with a notion of clock variable, it is possible to also capture the broader class of productive (co)programs. Until now, it has ...

Even in the absence of clocks, time bounds on the duration of actions enable the use of time for distributed coordination. This paper initiates an investigation of coordination in such a setting. A new communication structure called a zigzag pattern is ...

Sensing platforms are becoming batteryless to enable the vision of the Internet of Things, where trillions of devices collect data, interact with each other, and interact with people. However, these batteryless sensing platforms—that rely purely on ...

Loop transformations are known to be important for performance of compute-intensive programs, and are often used to expose parallelism. However, many transformations involving loops often obfuscate the code, and are cumbersome to apply by hand. The ...

This paper investigates the addition of Clocked Variables to the X10 Programming Language. Clocked Variables work well for primitives and objects with only primitive fields, but incur substantial performance penalties for more complex objects. We ...

Daily life applications of machine‐to‐machine (M2M) communication are constantly increasing. Typically, M2M communication systems comprise numerous small, cheap and autonomous devices that communicate with each other while monitoring environmental ...

The efficiency of the time synchronization service in wireless sensor networks is tightly connected to the design of the radio, the quality of the clocking hardware, and the synchronization algorithm employed. While improvements can be made on all ...

Clock meshes possess inherent low clock skews and excellent immunity to process-voltage-temperature variations, and have increasingly found their way to high-performance integrated circuit designs. However, analysis of such massively coupled networks is ...

We present Virtual High-resolution Time (VHT), a power-proportional time-keeping service that offers a baseline power draw of a low-speed clock (e.g. 32 kHz crystal), but provides the time resolution that only a higher frequency clock could offer (e.g. ...

In this demonstration, we will present three key technologies we recently developed to improve time synchronization accuracy in sensor networks: (1) Temperature Driven Time Synchronization, (2) Low-Power Sub-μSecond Time Synchronization, and (3) Low-...

In the paper, we analyze the effect of clock slew in subthreshold circuits. Specifically, we address the issue that variations in clock slew at the register control can cause serious timing violations. We show that clock slew variations can cause latch ...

A general model for injection-locked LC oscillators (LC-ILOs) is presented that is valid for any tank quality factor and injection strength. Important properties of an ILO such as lock-range, phase shift, bandwidth and response to input jitter are ...

The clock synchronization problem in distributed system is meant to address the following issues: events generation at exact moment in time and to distribute computing for parallel and distributed algorithms. Nowadays the biggest distributed system, ...

This paper describes a timing-skew calibration technique which equalizes the phase spacings among multiphase clocks. The scheme uses simple sample-and-hold circuits controlled by the multiphase clocks to sample a common reference input. Phase spacing is ...

Recent trends in the development of integrated silicon frequency sources are discussed. Within that context, a 25-MHz self-referenced solid-state frequency source is presented and demonstrated where measured performance makes it suitable for replacement ...

In a typical clock distribution scheme, a central clock signal is distributed to several sites on the integrated circuit (IC). Local regenerators at these sites buffer the clock signal for the logic in regions close to the regenerator. Minimizing the ...