کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
454830 695298 2013 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Systematic investigation of the effects of unidirectional links on the lifetime of wireless sensor networks
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
Systematic investigation of the effects of unidirectional links on the lifetime of wireless sensor networks
چکیده انگلیسی


• Unidirectional links improve the network lifetime significantly in sparse networks.
• In dense networks unidirectional links does not prolong lifetime considerably.
• Utilization of unidirectional links is more important in P-model than D-model.
• The number of bidirectional links is higher than unidirectional links for D-model.
• Unidirectional links decrease disconnection probability in general for P-model.

Link unidirectionality is a commonly encountered phenomenon in wireless sensor networks (WSNs), which is a natural result of various properties of wireless transceivers as well as the environment. Transmission power heterogeneity and random irregularities are important factors that create unidirectional links. Majority of the inter-node data transfer mechanisms are designed to work on bidirectional links (i.e., due to the lack of a direct reverse path, handshaking cannot be performed between a transmitter and receiver) which render the use of unidirectional links infeasible. Yet, there are some data transfer mechanisms designed specifically to operate on unidirectional links which employ distributed handshaking mechanisms (i.e., instead of using a direct reverse path, a multi-hop reverse path is used for the handshake). In this study, we investigate the impact of both transmission power heterogeneity and random irregularities on the lifetime of WSNs through a novel linear programming (LP) framework both for networks that utilize only bidirectional links and for those that can use bidirectional links as well as unidirectional links.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Standards & Interfaces - Volume 36, Issue 1, November 2013, Pages 132–142
نویسندگان
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