tailieunhanh - Báo cáo hóa học: " Impact of the environment and the topology on the performance of hierarchical body area networks"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Impact of the environment and the topology on the performance of hierarchical body area networks | Dricot et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 122 EURASIP Journal on . http content 2011 1 122 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access Impact of the environment and the topology on the performance of hierarchical body area networks 1 1 I I- -2 1 1 Jean-Michel Dricot Stéphane Van Roy Gianluigi Ferrari Frangois Horlin and Philippe De Doncker Abstract Personal area networks and more specifically body area networks BANs are key building blocks of future generation networks and of the Internet of Things as well. In this article we present a novel analytical framework for network performance analysis of body sensor networks with hierarchical tree topologies. This framework takes into account the specificities of the on-body channel modeling and the impact of the surrounding environment. The obtained results clearly highlight the differences between indoor and outdoor scenarios and provide several insights on BAN design and analysis. In particular it will be shown that the BAN topology should be selected according to the foreseen medical application and the deployment environment. 1. Introduction Recent advances in ultra-low power sensors have fostered the research in the field of body-centric networks also referred to as body area networks BANs 1-4 . In these networks a set of nodes called sensors is deployed on the human body. They aim at monitoring and reporting several physiological values such as blood pressure breath rate skin temperature or heart beating rate. Most of the time sensing is performed at low rates but in emergency situations the network load may increase in seconds. Therefore an in-depth analysis of the network outage throughput and achievable transmission rate can give insights on the maximum supported reporting rate and the corresponding performance. In 5 6 we have considered a preliminary link-level performance analysis of BANs with centralized .