Indoor positioning systems have received increasing attention for supporting location-based services in indoor environments. WiFi-based localization has been attractive due to its open access and low cost properties. However, the distance estimation based on signal strength indicator (RSSI) is easily affected by temporal spatial variance multipath effect, which contributes most of errors current systems. In this work, we analyze effect across physical layer account undesirable RSSI readings...

Indoor positioning systems have received increasing attention for supporting location-based services in indoor environments. WiFi-based localization has been attractive due to its open access and low cost properties. However, the distance estimation based on signal strength indicator (RSSI) is easily affected by temporal spatial variance multipath effect, which contributes most of errors current systems. How eliminate such effect so as enhance performance a big challenge. In this work, we...

WLAN-based indoor location fingerprinting has been attractive owing to the advantages of open access and high accuracy. Most fingerprinting-based systems so far rely on received signal strength (RSS), which can be easily measured at receiver with commercial WLAN equipment. However, RSS is a coarse value simply measures power for whole channel. Thus, it fluctuates over time in typical environments rich multipath effects not unique specific location. In this paper, we present design,...

Many emerging applications such as intruder detection and border protection drive the fast increasing development of device-free passive (DfP) localization techniques. In this paper, we present Pilot, a Channel State Information (CSI)-based DfP indoor system in WLAN. Pilot design is motivated by observations that PHY layer CSI capable capturing environment variance due to frequency diversity wideband channel, position where entity located can be uniquely identified monitoring feature pattern...

The emerging industrial metaverses realize the map-ping and expanding operations of physical industry into virtual space for significantly upgrading intelligent manufacturing. obtain data from various production operation lines by Industrial Internet Things (IIoT), thus conduct effective analysis decision-making, thereby en-hancing efficiency space, reducing operating costs, maximizing commercial value. However, there still exist bottlenecks when integrating IIoT, such as privacy leakage...

Gesture recognition has emerged recently as a promising application in our daily lives. Owing to low cost, prevalent availability, and structural simplicity, RFID shall become popular technology for gesture recognition. However, the performance of existing RFID-based systems is constrained by unfavorable intrusiveness users, requiring users attach tags on their bodies. To overcome this, we propose GRfid, novel device-free system based phase information output COTS devices. Our work stems...

Device-free passive (Dfp) motion detection seeks to monitor the position change of entities without actively carrying any physical devices. Recently, WLAN with a rich set installed wireless infrastructures enables in area interest. WLAN-enabled DfP rely on received signal strength (RSS) is verified be able provide acceptable high accuracy. Although RSS can easily measured commercial equipments, it suspectable measurement itself due multipath effect indoor environment. In this paper, we...

Next-generation blockchain ecosystem will be fuelled by a large variety of systems. These systems increasingly demand proper cross-chain cooperation to provide richer functionalities and enhanced capabilities in the future landscape. How enable such `interoperability' - effective communication efficient data transfer across multiple is thus critical facing many unprecedented theoretical practical challenges. In this paper, we first clarify definition interoperability based on cross...

Disk failure has become a major concern with the rapid expansion of storage systems in data centers. Based on SMART (Self-Monitoring, Analysis and Reporting Technology) attributes, many researchers derive disk prediction models using machine learning techniques. Despite significant developments, majority works rely offline training thereby hinder their adaption to continuous update forthcoming data, suffering from 'model aging' problem. We are therefore motivated uncover root cause --...

As social networks are integrated into the Vehicular Ad Hoc Networks (VANETs), emerging Social (VSNs) have gained massive interests. However, security and privacy of data generated by various applications in VSNs is a great challenge, which blocks further development VSNs. The blockchain technology seems to be good catalyst for VSN with its high irreversible features, can also management tool rapidly tamper proof. full duplicates need stored each node ensure security, unacceptable vehicles...

Federated learning (FL) has been gaining popularity as a way to provide privacy-preserving data sharing for the Internet of Medical Things (IoMT). As complementary, blockchain technology is used in recent literature make FL secure. However, existing blockchain-based (BFL) solutions do not perform well when BFL cluster are sparse. A direct solution collect many devices possible establish large cluster. these may locate geographically distant areas and be separated by great distance, which...

In this paper, semi-implicit-explicit (Semi-IMEX) and semi-implicit multistep methods are proposed to solve nonlinear partial integro-differential equations (PIDEs), which describe the option pricing models with transaction costs or illiquid markets under Merton's jump-diffusion process. After spatial differential operators treated by using finite difference jump integral is computed composite trapezoidal rule, consistency error global bounds for semi-IMEX abstract PIDEs provided when...

Reliable people counting is crucial to many urban applications. However, most existing systems are sensor-based and can only work in some fixed gateways or checkpoints where sensors have been installed. This high dependence on the exact locations of leads low accuracy. To overcome these limitations, this paper, we propose a smartphone-based system, Wi-Counter, by leveraging pervasive Wi-Fi infrastructure. collect comprehensive signals count information based crowdsource, Wi-Counter first...

Blockchain technology offers an intelligent amalgamation of distributed ledger, Peer-to-Peer (P2P), cryptography, and smart contracts to enable trustworthy applications without any third parties. Existing blockchain systems have successfully either resolved the scalability issue by advancing consensus protocols from control plane, or complemented security updating block structure encryption algorithms data plane. Yet, we argue that underlying P2P network plane remains as important but...

Sharing data across various Internet of Things (IoT) devices has been a common challenge due to efficiency, security, and stability issues. Blockchain, with security features, is considered be potential solution for sharing in IoT settings. However, traditional blockchain-based solutions cannot satisfy the efficiency requirement high-frequency among devices. In this paper, we propose an efficient approach by adopting Payment Channel Network (PCN)-extended blockchain. Besides, develop...

An SDN enabled mobile access network is a future with great potential to support scalable and flexible applications. To various applications, the SDN-enabled usually uses forwarding rules in devices. With limited rule space existing devices, caching mechanism an efficient way improve performance. In this article we propose SRCMN, which new structure performance network. We design two-layer each device, managed by controller. also cache prefetching consideration of user mobility. By...

The pioneer blockchain platform Bitcoin has drawn massive attention from various sectors in society, with its promising decentralized, irreversible, and trust-free natures. Increasing volume of transactions makes it impractical for each user to store a full copy whole ledger, especially normal who few owns constrained storage space. There are already some works conducted reduce the overhead by redesigning system protocol, based on different trust assumptions. An example is running light...

With customization of demands and functionalities, diverse blockchain systems are integrated with IoT in different application scenarios, forming a multichain environment. Multichain interoperability has become crucial emerging issue, i.e., difficult to interact each other credibly efficiently. It further leads isolated data islands across multichain. Therefore, it is significant importance facilitate sharing among systems. Toward achieving this, there two main challenges. First, multiple...

We study both analytically and numerically the robustness ofninterdependent networks with partial support-dependence relationship, which reflects real-world more realistically. For a starlike network ofnErd˝os-Renyi (ER) networks, we find that system undergoes from second-order to first-order phase transition as coupling strengthqincreases. Moreover, notice region of becomes larger, while smaller number networksnincreases. However, for ofnscale-free (SF) through hybrid-order asqincreases....