Due to cyber-physical systems, a large-scale multiversion indexing scheme has garnered significant attention in recent years. However, modern multiversion indexing schemes have significant drawbacks (e.g., heavy write traffic and weak key- or version-range-query performance) while being applied to a computer system with a nonvolatile random access memory (NVRAM) as its main memory. Unfortunately, with the considerations of high memory cell density and zero-static power consumption, NVRAM has been regarded as a promising candidate to substitute for dynamic random access memory (DRAM) in future computer systems. Therefore, it is critical to make a multiversion indexing scheme friendly for an NVRAM-based system. For tackling this issue with modern multiversion indexing schemes, this article proposes a write-reduction multiversion indexing scheme with efficient dual-range queries. According to the experiments, our scheme effectively reduces the amount of write traffic generated by the multiversion indexing scheme to NVRAM. It offers efficient dual-range queries by consolidating the proposed version forest and the multiversion tree.

In our previous work, a simulation framework was proposed to focus on imitating the behavior of wireless charging vehicles (WCVs) and wireless sensor networks (WSNs) because current mainstream simulators have very limited support on simulation of WCVs. The WCV is an integration of a mobile vehicle and a wireless power transfer broadcaster, which is used to recharge sensors wirelessly to prolong the lifetime of sensor networks. In the study of WCVs, simulators are extensively used to study the routing algorithms and behaviors of WCVs because it is very costly to build a WSN testbed and many specifications are not standardized. However, mainstream WSN simulators require researchers to develop and integrate their WCV modules. Therefore, the previously proposed framework aims to provide a simple framework for simulating of wireless power transfer and mobile vehicles. In this study, to further strength the usability of the proposed simulation framework, a graphic user interface is introduced to allow users to assign sensors' location and specify simulation parameters.

In this live demonstration, we would like to present a simulation framework for simulating the behaviors of Wireless Sensor Network (WSN) and Wireless Charging Vehicle (WCV). Different to general purpose WSN simulators, the proposed simulation framework focuses on the simulation of mobile vehicles and wireless power transfer techniques. Besides, the proposed framework provides an easy-to-use user interface and a well structured system architecture. The proposed framework aims to eliminate the need for researchers to build their own simulator or integrate wireless charging modules, allowing them directly to evaluate their algorithm and compare the simulation results.