A cognitive radio (CR) is a promising technology to solve the emerging spectrum crisis, especially for applications where thousands of wireless sensor nodes are deployed. Since continuous sensing will greatly reduce lifetime network composed energy-restricted CR nodes, an accurate method predicting occupancy necessary improve energy efficiency. This paper proposes hidden Markov model (HMM)-based cooperative (CSS) that predicts status environment. The traditional prediction algorithms assume...

In this work we propose an energy-efficient transmission strategy for wireless sensor networks that operate in a strict energy-constrained environment. Our algorithm consists of two components: binary-decision based and channel-aware backoff adjustment. the transmission, decision on whether to transmit or not is absolutely dependent current channel conditions. Specifically, initiated only when quality exceeds specified threshold, so unsuccessful transmissions causing waste energy are avoided...

Energy efficient routing is one of the key design issues to prolong lifetime wireless sensor networks (WSNs) since nodes can not be easily re-charged once they are deployed. During process, routes with only few hops or too many energy efficient. Hop-based algorithms largely improve efficiency multi-hop in WSNs because determine optimal hop number as well corresponding intermediate during process under medium high density network. In this paper, we focus on studying relationship between...

Wireless body area networks (WBANs) which is standardized by IEEE 802.15 TG6 support communication service with in/on/around body. Similar to wireless sensor network (WSN) environment, devices of WBAN may be densely deployed. Compared WSN, however, operates in a centralized manner, and thus, contention complexity on contention-based phase larger than WSN. In this paper, we propose novel channel access algorithm for based MAC protocol WBANs. The proposed classifies the into 4-levels priority...

M odern urban societies depend greatly on critical lifeline systems such as drinking water supply.Water supply in the United States comprise about one million mile length of interconnected pipelines that transport from sources to consumption points with support treatment plants, pumping stations, storage tanks and valves.While depleting freshwat er some regions is an alarming concern, infrastruct ure woes exacerbate problem meeting reliability targets.Evidenced by "D" or lower grade it has...

The proliferation of Internet Things (IoT) devices comes with many challenges among which security is one the most serious issues. In order to address issue for low-end IoT devices, ARM recently proposed platform architecture (PSA), provides execution isolation safely manage and protect computing resources devices. However, developers implementing services PSA-based need follow complex development procedures understand PSA hardware, dramatically increases time cost This article analyzes...

This paper aims to combine adaptive modulation and coding with layered video improve the quality of services users experiencing differing radio conditions, in context broadcast multicast standards such as MBMS BCMCS. We propose an optimal resource allocation algorithm which maximizes a general performance metric for session polynomial time. show that system-wide can be obtained by combining our simple two-step decomposition system. In some configurations frequent re-allocations are required,...

Due to the high packet loss rate during multi-hop transmissions in wireless sensor networks, more reliable end-to-end data transmission is desirable. Because network applications require various levels of communication reliability (CR), should satisfy desired CR applications. In this letter, we propose a flexible recovery mechanism for with CRs. The proposed scheme caches packets at intermediate nodes over routing paths computed by retransmit lost transmissions. presents tradeoff between...

The coexistence problem occurs when a single wireless body area network (WBAN) is located within multiple-WBAN environment. This causes WBANs to suffer from severe channel interference that degrades the communication performance of each WBAN. Since WBAN handles vital signs affect human life, detection or prediction condition needed guarantee reliable for sensor node Therefore, this paper presents learning-based algorithm efficiently predict in proposed jointly applies PRR and SINR, which are...

Wireless body area network (WBAN) is a communication technology, which aims providing both medical and consumer electronics services through sensor devices in, on, or around human body. Due to the absence of IEEE 802.15.6-based RF modules, 802.15.4, typical low-power technology requirements are similar, considered implement WBANs. In case where lot WBANs coexist, meanwhile, collisions signal attenuations may lead their performance degradation. However, 802.15.4 does not provide any solutions...

In a wireless sensor network, nodes are deployed in an ad hoc fashion and they deliver data packets using multihop transmission. However, transmission failures occur frequently the over media. Thus, loss recovery mechanism is required to provide end-to-end reliability. addition, because very small devices have insufficient resources, energy-efficient crucial for prolonging lifetime of network. This paper proposes power control reliable transmission, which satisfies communication reliability...

High-performance memory buses consume large energy as they include termination networks, BiCMOS and/or open-drain output. This paper introduces power reduction techniques for systems deliberating on burst-mode transfers over the high-speed bus specifications such Low Voltage (LVT), Gunning Transfer Logic (GTL+) and Stub Series Termination (SSTL_2) which are widely used. The take both static dynamic consumption into account because most high-performance drivers end-termination networks...

Recent technological advances in wireless sensor networking have opened up new opportunities healthcare systems. Future medical systems are expected to benefit the most such areas as in-home assistance, smart nursing homes, and clinical trial. However network system including body networks environmental normally comprised of energy constrained nodes. Furthermore, communication interference between multi mode nodes a dynamic is also challenge. This limitation has led crucial need for mobility...

A wireless body area network (WBAN) has recently issued a next generation technology of personal networks (WPAN) and it will provide various ubiquitous services for both medical non-medical services. In addition, when WBANs are intelligently interworked, more smart be available. Although the current IEEE 802.15.6 standard recognizes only an individually organized WBAN, they should integrated to perform large-scale To support interworking WBANs, new architecture its maintenance scheme...

Many energy aware routing algorithms and protocols have been proposed for wireless sensor networks recently to achieve aims like minimum consumption, maximized network lifetime, reduced communication latency overhead etc. The problem of hotspot can not be well addressed under many since some nodes which are on the shortest path or close base station tend deplete their quickly consequently cause partition. In this paper, we propose a Ring-based Energy Aware Routing (REAR) algorithm both...

Recent IoT services are being used in various fields such as smart homes, factories, cars and industrial systems. These implemented through hyper-connected devices, accordingly, security requirements of these devices highlighted. In order to satisfy the studies have been conducted HSM, Security SoC, TrustZone. particular, ARM proposed Platform Architecture (PSA), which is a architecture that provide execution isolation safely manage protect computing resources low- end devices. PSA can...

Some applications need to collect information from several different sensor networks provide comprehensive services. In order simplify the complexity of dealing with heterogeneous networks, a uniform interface should be provided for users. This paper describes novel approach integrate these into one virtual network. Users can easily query data through this By having comparison and prototyping work we claim that our new cover most advantages related researches

Wireless body area networks (WBANs) provide communication services in the vicinity of human body. Since WBAN consists both medical and consumer electronics (CE) applications, MAC protocols should be designed considering flexibility different characteristics between CE applications.

In wireless sensor networks, clustering schemes have been adopted as an efficient solution to prolong the network lifetime. these schemes, performance of energy-efficient data transmission is affected cluster ratio (CR). This paper analyzes optimal CR from perspective energy efficiency, and its impact on order provide a generic analytic model, various propagation cases are mathematically analyzed. addition, lifetime extended by jointly optimizing count link reliability. Our simulation...