Lifetime improvement in wireless sensor networks via collaborative beamforming and cooperative transmission
dc.contributor.author | Han, Zhu | |
dc.contributor.author | Poor, H. Vincent | |
dc.date.accessioned | 2020-05-11T16:17:39Z | |
dc.date.available | 2020-05-11T16:17:39Z | |
dc.date.issued | 12/18/2007 | |
dc.description.abstract | Collaborative beamforming (CB) and cooperative transmission (CT) have recently emerged as communication techniques that can make effective use of collaborative/cooperative nodes to create a virtual multiple-input/multiple-output system. Extending the lifetime of networks composed of battery-operated nodes is a key issue in the design and operation of wireless sensor networks. The effects on network lifetime of allowing closely located nodes to use CB/CT to reduce the load or even to avoid packet-forwarding requests to nodes that have critical battery life are considered. First, the effectiveness of CB/CT in improving the signal strength at a faraway destination using energy in nearby nodes is studied. Then, the performance improvement obtained by this technique is analysed for a special 2D disc case. Further, for general networks in which information-generation rates are fixed, a new routing problem is formulated as a linear- programming problem, whereas for other general networks, the cost for routing is dynamically adjusted according to the amount of energy remaining and the effectiveness of CB/CT. From the analysis and the simulation results, it is seen that the proposed method can reduce the payloads of energy-depleting nodes by about 90% in the special case network considered and improve the lifetimes of general networks by about 10%, compared with existing techniques | |
dc.identifier.citation | Copyright 2007 IET Microwaves, Antennas and Propagation. This is a pre-print version of a published paper that is available at: https://digital-library.theiet.org/content/journals/10.1049/iet-map_20060294. Recommended citation: Han, Zhu, and Harold Vincent Poor. "Lifetime improvement in wireless sensor networks via collaborative beamforming and cooperative transmission." IET microwaves, antennas & propagation 1, no. 6 (2007): 1103-1110. doi: 10.1049/iet-map:20060294. This item has been deposited in accordance with publisher copyright and licensing terms and with the author's permission. | |
dc.identifier.uri | https://hdl.handle.net/10657/6505 | |
dc.publisher | IET Microwaves, Antennas and Propagation | |
dc.subject | linear programming | |
dc.subject | MIMO communication | |
dc.subject | wireless sensor networks | |
dc.title | Lifetime improvement in wireless sensor networks via collaborative beamforming and cooperative transmission | |
dc.type | Article |