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Constructive Interference (CI) phenomenon has been exploited by Glossy, a mechanism for low-latency and reliable network flooding and time synchronization for wireless sensor networks. Recently, CI has also been used for other applications such as data collection and multicasting in static and mobile WSNs. These applications base their working on the high reliability promised by Glossy regardless...
Centralized Enterprise WLAN (CE-WLAN) encompassing supernumerary access points (APs) are being used to provide capacity to indoor environments. The approach of over dimensioned deployment of APs to meet the capacity needs of users at critical time periods are advocated with little concern towards the important issue of energy wastage. For a sustainable greener environment the issue of energy saving...
In the IEEE 802.11 standard meager effort has been invested towards devising greener WLAN communication. Especially with the massive deployment of Enterprise WLAN in indoor networks a lot of access points (APs) are densely packed for increasing the capacity offered. But most of the APs deployed are idle for a larger period of time in a day. This paper proposes to use a centralized controlled distributed...
Enterprise WLANs encompassing supernumerary Access Points (APs) are being used to provide capacity to indoor environments. The approach of over dimensioned deployment of APs to meet the capacity needs of users at critical time points are advocated without little concern towards the important issue of power wastage. For a sustainable greener environment the issue of power saving in such enterprise...
In-home networking is becoming a reality. New multimedia applications envisaged for in-home networks require data rates of hundreds of Mbps. In order to provision these applications, wireless networks should provide the user with high speed transmission using short-range Gbps wireless technology. With its unlicensed 5 GHz of spectrum, 60 GHz is envisaged for indoor broadband wireless networks. However,...
Powering wireless sensors with harvested energies is coming of age due to the sources providing higher power densities and the electronics performing efficient energy conversion. However, to ensure energy harvesting as a viable option, several system parameters have to be tuned. In this work, we identify these key system parameters and show that by suitably tuning them, one can drive wireless sensor...
Energy-aware routing is an effective way to extend the operational lifetime of wireless ad hoc networks. In this paper, we propose a new energy-aware routing scheme called Reliable Minimum Energy Cost Routing (RMECR). RMECR finds routes which require least amount of energy for reliable packet transfer in ad hoc networks. It defines the energy cost of packet forwarding by a node as the fraction of...
In this work, we study the adaptability of well known cryptography algorithms to energy harvesting wireless sensor networks. We are particularly interested in algorithms that have the ability to adapt to varying power in such networks. Our investigations and implementation on hardware platforms indicate that it is optimal to precompute a few key stream bytes, store in memory and later used during...
The 60 GHz technology has a great potential to provide wireless communication at multi-gigabit rates in future home networks. To maintain the network connectivity with 60 GHz links, which are highly susceptible to propagation and penetration losses, is a major challenge. The quality and the robustness of the 60 GHz links can be improved by employing relay nodes in the network. In this paper, the contribution...
Energy-aware routing is an effective way to prolong the lifetime of nodes with scarce battery power in ad hoc networks. The proposed energy-aware routing schemes so far do not consider the energy supply of nodes in route selection. They only consider the residual battery capacity of nodes. This paper proposes energy-aware routing algorithms for ad hoc networks with both battery-powered and mains-powered...
Wireless personal area networks (WPANs) usually have very limited coverage. In this paper, we focus on methods to extend this range through multi-hop communication crossing several inter-connected WPANs called piconets. Multi-hop communication between piconets is possible through the bridge devices. While extending the range of WPANs, bridge devices become the capacity bottlenecks for these connected...
Personal Network (PN) is a novel concept which facilitates anytime and anywhere interaction between the user and all the devices he owns them. Services are provided to the user of a PN by enabling multi-hop communication between his devices. Relaying traffic in multi-hop networks drains the battery of intermediate nodes quickly. Usually in a PN both battery-operated and mains-connected or grid-powered...
The next-generation wireless network is envisaged to incorporate multi-hop ad hoc characteristics into cellular network infrastructure. Multi-hop communication is viewed as an annexe to the cellular network infrastructure in order to increase coverage and capacity. Currently, the Third Generation Partnership Project (3GPP) is investigating multi-hop functionality as one technical component for LTE-Advanced...
Personal networks (PN) is a concept in the area of modern communication networks in which devices belonging to a person cooperate to offer services to the person regardless of their geographical locations. A PN may consist of several ad-hoc sub-networks (or clusters) which are interconnected through infrastructure networks such as the Internet. Failure of personal devices due to battery shortage is...
Clustering has been used as a fundamental tool to improve scalability in large wireless ad hoc networks. Techniques based on clustering, such as routing, self-organization, context management, service discovery, etc., ensure QoS in wireless ad hoc networks when the number of devices increases. The crucial issue of clustering is the overhead generated during the cluster formation and maintenance phases...
Service-oriented architecture can be considered as a philosophy or paradigm in organizing and utilizing services and capabilities that may be under the control of different ownership domains. Virtualization provides abstraction and isolation of lower level functionalities, enabling portability of higher level functions and sharing of physical resources. However, dynamics, environmental conditions...
As described in the scope of the IEEE 802.15 working group, impulse radio ultra wide band (IR-UWB) is suitable for many wireless personal area network (WPAN) applications. Due to the short radio coverage of the UWB technology limited by the FCC regulations, IR-UWB devices that participate in a WPAN may not be always reachable within the single hop. The multi-hop capability will be a substantial requirement...
Group mobility has been modeled for simulators to evaluate protocols in wireless ad hoc networks. These mobility models have to be verified in terms of their instant and long-run behaviors. This paper discusses importance and challenges of the stability evaluation for ad hoc group mobility models; proposes analytical technique for the stability of group mobility model and evaluation of the same via...
QoS-sensitive applications transmitted over wireless links require precise knowledge of the wireless environment. However, the dynamic nature of wireless channel, together with its different configurations and types, makes so called link quality estimation (LQE) a difficult task. This paper looks into the design of an accurate and fast LQE method for a multi data rate environment. We investigate the...
User centered personal network (PN) interconnects various devices belonging to a user in different geographic locations, such as home, office, car, etc., to form one network to improve the quality of life of the user. In PNs, the user's devices move in different groups, where these groups merge and split. A PN mobility model (PNMM) has been proposed to model the devices' movements in PNs. In this...
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