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this file talk about wireless comunication
WIRELESS55.rar
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<html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta charset="utf-8"> <meta name="generator" content="pdf2htmlEX"> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <link rel="stylesheet" href="https://static.pudn.com/base/css/base.min.css"> <link rel="stylesheet" href="https://static.pudn.com/base/css/fancy.min.css"> <link rel="stylesheet" href="https://static.pudn.com/prod/directory_preview_static/62444798337ddb528507330b/raw.css"> <script src="https://static.pudn.com/base/js/compatibility.min.js"></script> <script src="https://static.pudn.com/base/js/pdf2htmlEX.min.js"></script> <script> try{ pdf2htmlEX.defaultViewer = new pdf2htmlEX.Viewer({}); }catch(e){} </script> <title></title> </head> <body> <div id="sidebar" style="display: none"> <div id="outline"> </div> </div> <div id="pf1" class="pf w0 h0" data-page-no="1"><div class="pc pc1 w0 h0"><img class="bi x0 y0 w1 h1" alt="" src="https://static.pudn.com/prod/directory_preview_static/62444798337ddb528507330b/bg1.jpg"><div class="c x1 y1 w2 h2"><div class="t m0 x2 h3 y2 ff1 fs0 fc0 sc0 ls0 ws0">COMMUNICATIONS<span class="_"> </span>OF THE ACM<span class="_ _0"> </span><span class="ff2 ls1">May 2000/Vol. 43, <span class="_ _1"></span>No. 5<span class="_ _2"> </span></span><span class="fs1 ls2">51</span></div><div class="t m1 x3 h4 y3 ff3 fs2 fc0 sc0 ls3 ws0">For <span class="_ _1"></span>pervasive <span class="_ _1"></span>computing <span class="_ _1"></span>performance, <span class="_ _1"></span>exploit <span class="_ _1"></span>the </div><div class="t m1 x3 h4 y4 ff3 fs2 fc0 sc0 ls4 ws0">physical <span class="_ _1"></span>limits <span class="_ _1"></span>of <span class="_ _1"></span>these <span class="_ _1"></span>densely <span class="_ _1"></span>distributed <span class="_ _1"></span>networks <span class="_ _1"></span>of </div><div class="t m1 x3 h4 y5 ff3 fs2 fc0 sc0 ls3 ws0">embedded <span class="_ _1"></span>sensors, <span class="_ _1"></span>controls, <span class="_ _1"></span>and <span class="_ _1"></span>processors.</div><div class="t m0 x3 h5 y6 ff3 fs3 fc1 sc0 ls3 ws0">W</div><div class="t m0 x4 h6 y7 ff4 fs4 fc0 sc0 ls5 ws1">ireless integrated network sen-</div><div class="t m0 x4 h6 y8 ff4 fs4 fc0 sc0 ls5 ws2">sors (WINS) provide distrib-</div><div class="t m0 x4 h6 y9 ff4 fs4 fc0 sc0 ls6 ws3">uted network and Internet</div><div class="t m0 x4 h6 ya ff4 fs4 fc0 sc0 ls5 ws4">access to sensors, controls, and</div><div class="t m0 x4 h6 yb ff4 fs4 fc0 sc0 ls5 ws5">processors deeply embedded in</div><div class="t m0 x4 h6 yc ff4 fs4 fc0 sc0 ls5 ws6">equipment, facilities, and the</div><div class="t m0 x3 h6 yd ff4 fs4 fc0 sc0 ls5 ws7">environment. The WINS network repr<span class="_ _3"></span>esents a new</div><div class="t m0 x3 h6 ye ff4 fs4 fc0 sc0 ls5 ws8">monitoring and control capability for applications</div><div class="t m0 x3 h6 yf ff4 fs4 fc0 sc0 ls5 ws9">in such industries as transportation, manufacturing,</div><div class="t m0 x3 h6 y10 ff4 fs4 fc0 sc0 ls5 wsa">health care, environmental o<span class="_ _3"></span>versight, and safety and</div><div class="t m0 x3 h6 y11 ff4 fs4 fc0 sc0 ls5 wsb">security<span class="_ _4"></span>. WINS combine microsensor technology</div><div class="t m0 x3 h6 y12 ff4 fs4 fc0 sc0 ls5 wsc">and low-po<span class="_ _3"></span>wer signal processing, computation, and</div><div class="t m0 x3 h6 y13 ff4 fs4 fc0 sc0 ls5 wsd">low-cost wireless networ<span class="_ _3"></span>king in a compact system. </div><div class="t m0 x5 h6 y14 ff4 fs4 fc0 sc0 ls7 wse">Recent advances in integrated cir<span class="_ _3"></span>cuit technology</div><div class="t m0 x3 h6 y15 ff4 fs4 fc0 sc0 ls7 wsf">have enabled construction of far more capable yet</div><div class="t m0 x6 h6 y16 ff4 fs4 fc0 sc0 ls7 ws10">inexpensive sensors, radios, and</div><div class="t m0 x7 h6 y17 ff4 fs4 fc0 sc0 ls7 ws11">processors, allowing mass</div><div class="t m0 x8 h6 y18 ff4 fs4 fc0 sc0 ls7 ws12">production of sophisti-</div><div class="t m0 x9 h6 y19 ff4 fs4 fc0 sc0 ls7 ws13">cated systems linking</div><div class="t m0 x9 h6 y1a ff4 fs4 fc0 sc0 ls7 ws14">the physical world to</div><div class="t m0 x9 h6 y1b ff4 fs4 fc0 sc0 ls7 ws15">digital data networks</div><div class="t m0 xa h6 y1c ff4 fs4 fc0 sc0 ls7 ws16">[2&#8211;5]. Scales range from local to global for applica-</div><div class="t m0 xa h6 y1d ff4 fs4 fc0 sc0 ls7 ws17">tions in medicine, security<span class="_ _4"></span>, factory automation, envi-</div><div class="t m0 xa h6 y1e ff4 fs4 fc0 sc0 ls8 ws18">ronmental monitoring, and condition-based</div><div class="t m0 xa h6 y1f ff4 fs4 fc0 sc0 ls7 ws19">maintenance. Compact geometry and low cost allow</div><div class="t m0 xa h6 y20 ff4 fs4 fc0 sc0 ls7 ws1a">WINS to be embedded and distributed at a fraction</div><div class="t m0 xa h6 y21 ff4 fs4 fc0 sc0 ls7 ws1b">of the cost of conventional wireline sensor and actu-</div><div class="t m0 xa h6 y22 ff4 fs4 fc0 sc0 ls7 wsd">ator systems.</div><div class="t m0 xb h6 y23 ff4 fs4 fc0 sc0 ls7 ws1c">WINS opportunities depend on development of a</div><div class="t m0 xa h6 y24 ff4 fs4 fc0 sc0 ls7 ws1d">scalable, low-cost, sensor-network ar<span class="_ _3"></span>chitecture. S<span class="_ _3"></span>uch</div><div class="t m0 xa h6 y25 ff4 fs4 fc0 sc0 ls7 ws1e">applications require deliv<span class="_ _3"></span>er<span class="_ _1"></span>y of sensor information to</div><div class="t m0 xa h6 y26 ff4 fs4 fc0 sc0 ls7 ws1f">the user at a low bit rate through lo<span class="_ _3"></span>w-power trans-</div><div class="t m0 xa h6 y27 ff4 fs4 fc0 sc0 ls7 ws20">ceivers. Continuous sensor signal processing enables</div><div class="t m0 xa h6 y28 ff4 fs4 fc0 sc0 ls7 ws21">the constant monitoring of events in an environment</div><div class="t m0 xa h6 y29 ff4 fs4 fc0 sc0 ls7 ws22">in which short message packets would suffice. Futur<span class="_ _3"></span>e</div><div class="t m0 xa h6 y2a ff4 fs4 fc0 sc0 ls7 ws23">applications of distributed embedded processors and</div><div class="t m0 xa h6 y2b ff4 fs4 fc0 sc0 ls7 ws24">sensors will require v<span class="_ _3"></span>ast numbers of devices. Con-</div><div class="t m0 xa h6 y2c ff4 fs4 fc0 sc0 ls7 ws25">ventional methods of sensor networking repr<span class="_ _3"></span>esent an</div><div class="t m0 xa h6 y2d ff4 fs4 fc0 sc0 ls7 ws26">impractical demand<span class="_ _5"> </span>on cable installation and net-</div><div class="t m0 xa h6 y2e ff4 fs4 fc0 sc0 ls7 ws27">work bandwidth. P<span class="_ _3"></span>rocessing at the source would</div><div class="t m0 xa h6 y2f ff4 fs4 fc0 sc0 ls7 ws28">drastically reduce the financial, computational, and</div><div class="t m0 xa h6 y30 ff4 fs4 fc0 sc0 ls9 ws29">management burden on communication system</div><div class="t m0 x9 h7 y31 ff5 fs5 fc2 sc0 ls3 ws0">&#58882;</div><div class="t m0 xc h8 y32 ff3 fs6 fc0 sc0 lsa ws2a">G.J<span class="_ _3"></span>. P<span class="_ _3"></span>ottie and <span class="_ _1"></span>W<span class="_ _6"></span>.J<span class="_ _3"></span>. <span class="_ _1"></span>Kaiser</div><div class="t m0 x3 h9 y33 ff3 fs7 fc0 sc0 lsb ws0">WIRELESS</div><div class="t m0 x3 h9 y34 ff3 fs7 fc0 sc0 ls3 ws0">INTEGR<span class="_ _7"></span>A<span class="_ _8"></span>TED </div><div class="t m0 x3 h9 y35 ff3 fs7 fc0 sc0 ls3 ws0">NET<span class="_ _9"></span>W<span class="_ _9"></span>ORK</div><div class="t m0 x3 h9 y36 ff3 fs7 fc0 sc0 ls3 ws0">SENSORS</div></div><div class="t m0 xd ha y37 ff6 fs8 fc0 sc0 ls3 ws0"> </div></div><div class="pi" data-data='{"ctm":[1.461187,0.000000,0.000000,1.461187,0.000000,0.000000]}'></div></div> </body> </html>
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