10.1109@vetecs.2003.1207582(1).zip

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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/62519bfd6caf596192425efa/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/62519bfd6caf596192425efa/bg1.jpg"><div class="t m0 x1 h2 y1 ff1 fs0 fc0 sc0 ls0 ws0">A </div><div class="t m1 x2 h3 y1 ff2 fs0 fc0 sc0 ls0 ws0">2-Level Call <span class="_ _0"></span>Admission <span class="_ _0"></span>Control <span class="_ _1"></span>Scheme </div><div class="t m1 x3 h3 y2 ff2 fs0 fc0 sc0 ls0 ws0">Using <span class="ls1">Priority <span class="_ _2"></span>Queue <span class="_ _3"></span></span>for <span class="_ _0"></span>Decreasing </div><div class="t m1 x4 h3 y3 ff2 fs0 fc0 sc0 ls0 ws0">New <span class="_ _1"></span>Call <span class="_ _4"></span>Blocking </div><div class="t m2 x5 h4 y4 ff3 fs1 fc0 sc0 ls0 ws0">&amp; </div><div class="t m1 x6 h3 y4 ff2 fs0 fc0 sc0 ls0 ws0">Handoff <span class="_ _4"></span>Call <span class="_ _5"></span>Dropping </div><div class="t m3 x7 h5 y5 ff2 fs2 fc0 sc0 ls2 ws0">Myung </div><div class="t m4 x8 h6 y5 ff2 fs3 fc0 sc0 ls3 ws0">II </div><div class="t m5 x9 h7 y5 ff2 fs4 fc0 sc0 ls0 ws0">Kim </div><div class="t m3 xa h5 y5 ff2 fs2 fc0 sc0 ls2 ws0">and <span class="_ _5"></span><span class="ls4">Sung </span></div><div class="t m6 xb h7 y5 ff2 fs4 fc0 sc0 ls5 ws0">Jo </div><div class="t m3 xc h5 y5 ff2 fs2 fc0 sc0 ls4 ws0">Kim </div><div class="t m3 xd h5 y6 ff2 fs2 fc0 sc0 ls0 ws0">Dept. <span class="ls6">of </span>Computer <span class="_ _1"></span>Science </div><div class="t m7 xe h8 y7 ff3 fs5 fc0 sc0 ls0 ws0">&amp; </div><div class="t m3 xf h5 y7 ff2 fs2 fc0 sc0 ls0 ws0">Engineering, <span class="_ _1"></span>Chung-Ang <span class="_ _3"></span>University </div><div class="t m8 x10 h9 y8 ff2 fs6 fc0 sc0 ls7 ws0">221 </div><div class="t m3 x11 h5 y8 ff2 fs2 fc0 sc0 ls0 ws0">Huksuk-Dong <span class="_ _1"></span>Dongjak-Ku </div><div class="t m3 x12 h5 y9 ff2 fs2 fc0 sc0 ls0 ws0">Seoul <span class="_ _3"></span>156-756, <span class="_ _4"></span>South <span class="ls6">Korea </span></div><div class="t m3 x13 h5 ya ff2 fs2 fc0 sc0 ls0 ws0">{nicemi, </div><div class="t m9 x14 ha yb ff1 fs2 fc0 sc0 ls0 ws0">sjkim}@konan.cse.cau.ac.kr </div><div class="t m3 x15 h5 yc ff2 fs2 fc0 sc0 ls8 ws0">Absfrocr-In <span class="_ _6"> </span><span class="ls9">order <span class="_ _7"> </span><span class="lsa">to <span class="_ _8"> </span><span class="lsb">provide <span class="_ _8"> </span><span class="ls6">a <span class="_ _8"> </span></span></span>fast <span class="_ _9"> </span><span class="ls6">moving <span class="_ _a"> </span>mobile </span></span></span></div><div class="t m3 x16 h5 yd ff2 fs2 fc0 sc0 lsa ws0">host(MH) <span class="_ _8"> </span><span class="lsb">supporting <span class="_ _8"> </span>multimedia <span class="_ _7"> </span></span>applications <span class="_ _7"> </span><span class="lsc">mth <span class="_ _b"> </span><span class="ls6">a </span></span></div><div class="t m3 x16 h5 ye ff2 fs2 fc0 sc0 lsa ws0">consistent <span class="_ _9"> </span>quality <span class="_ _c"> </span><span class="ls6">of <span class="_ _a"> </span>service(QoS), <span class="_ _d"> </span><span class="ls4">an <span class="_ _7"> </span></span>efficient <span class="_ _e"> </span><span class="ls0">call </span></span></div><div class="t m3 x16 h5 yf ff2 fs2 fc0 sc0 lsa ws0">admission <span class="_ _f"></span>mechanism <span class="_ _2"></span><span class="lsd">is <span class="_ _2"> </span><span class="ls6">in <span class="_ _10"> </span>need. <span class="_ _10"> </span><span class="lsb">This <span class="_ _1"></span><span class="ls2">paper </span></span></span></span>proposes <span class="_ _f"></span><span class="ls9">the </span></div><div class="t m3 x16 h5 y10 ff2 fs2 fc0 sc0 ls0 ws0">2-level <span class="_ _b"> </span><span class="ls6">call <span class="_ _11"> </span>admissinn(2LCAC) <span class="_ _12"> </span><span class="lsa">scheme <span class="_ _11"> </span></span>based <span class="_ _b"> </span><span class="lsa">on <span class="_ _13"> </span></span>a <span class="_ _11"> </span>call </span></div><div class="t m3 x16 h5 y11 ff2 fs2 fc0 sc0 lsa ws0">admission <span class="_ _13"> </span>scheme <span class="_ _13"> </span>using <span class="_ _13"> </span><span class="ls4">the <span class="_ _14"> </span><span class="lsb">priority <span class="_ _b"> </span></span></span>to <span class="_"> </span><span class="lsb">guarantee <span class="_ _b"> </span></span>the </div><div class="t m3 x16 h5 y12 ff2 fs2 fc0 sc0 lsa ws0">consistent <span class="_ _14"> </span>QoS <span class="_ _10"> </span><span class="lsb">for <span class="_ _14"> </span></span>mobile <span class="_ _14"> </span>multimedia <span class="_ _13"> </span>applications. <span class="_ _2"> </span><span class="ls2">The </span></div><div class="t m3 x16 h5 y13 ff2 fs2 fc0 sc0 ls6 ws0">2LCAC <span class="_ _1"></span>consists <span class="_ _14"> </span><span class="lse">of <span class="_ _2"> </span><span class="ls9">the <span class="_ _1"></span><span class="lsa">basic <span class="_ _2"></span></span></span></span>call <span class="_ _2"></span><span class="lsa">admission <span class="_ _3"></span><span class="ls2">and <span class="_ _1"></span></span>advanced </span></div><div class="t m3 x16 h5 y14 ff2 fs2 fc0 sc0 lsa ws0">call <span class="_ _5"></span>admission; <span class="_ _1"></span><span class="ls9">the <span class="_ _4"></span>former <span class="_ _0"></span><span class="lsb">determines <span class="ls6">call <span class="_ _1"></span><span class="lsa">admission <span class="_ _4"></span><span class="ls6">based </span></span></span></span></span></div><div class="t ma x16 hb y15 ff2 fs7 fc0 sc0 lsf ws0">on </div><div class="t m3 x17 h5 y15 ff2 fs2 fc0 sc0 lsb ws0">bandwidth <span class="_ _9"> </span><span class="lsa">available <span class="_ _12"> </span><span class="ls9">in <span class="_ _12"> </span></span>each <span class="_ _8"> </span><span class="ls0">cell <span class="_ _8"> </span><span class="ls9">and <span class="_ _b"> </span></span></span>the <span class="_ _7"> </span><span class="ls9">latter </span></span></div><div class="t m3 x16 h5 y16 ff2 fs2 fc0 sc0 lsb ws0">determines <span class="_ _13"> </span><span class="lsa">call <span class="_ _11"> </span>admission <span class="_ _b"> </span>by <span class="_ _11"> </span><span class="ls6">utilizing <span class="_ _7"> </span></span>delay <span class="_ _11"> </span>tolerance </span></div><div class="t m3 x16 h5 y17 ff2 fs2 fc0 sc0 ls0 ws0">time(DTT) <span class="_ _9"> </span><span class="ls2">and <span class="_ _11"> </span><span class="lsb">priority <span class="_ _b"> </span><span class="ls6">queue(PQueue) <span class="_ _d"> </span><span class="lsa">algorithms. <span class="_ _11"> </span></span></span></span>In </span></div><div class="t m3 x16 h5 y18 ff2 fs2 fc0 sc0 ls9 ws0">order <span class="_ _15"> </span>to <span class="_ _14"> </span><span class="lsa">evaluate <span class="_ _11"> </span></span>the <span class="_ _10"> </span><span class="lsb">performance <span class="_ _b"> </span><span class="lse">of <span class="_ _11"> </span><span class="ls2">our <span class="_ _14"> </span><span class="ls6">scheme, <span class="_ _b"> </span></span></span>we </span></span></div><div class="t m3 x16 h5 y19 ff2 fs2 fc0 sc0 lsb ws0">measure <span class="_ _10"> </span><span class="ls9">the <span class="_ _f"></span><span class="lsa">metrics <span class="_ _14"> </span></span></span>such <span class="_ _2"></span><span class="ls10">as <span class="ls9">the <span class="_ _f"></span><span class="ls6">blocking <span class="_ _13"> </span><span class="lsa">probability <span class="_"> </span><span class="lse">of </span></span></span></span></span></div><div class="t m3 x16 h5 y1a ff2 fs2 fc0 sc0 ls6 ws0">new <span class="_ _12"> </span><span class="ls0">calls, <span class="_ _8"> </span><span class="ls9">dropping <span class="_"> </span><span class="lsb">probability <span class="_ _12"> </span><span class="lse">of <span class="_ _7"> </span><span class="lsa">handoff <span class="_ _b"> </span></span></span></span></span></span>calls <span class="_ _7"> </span><span class="ls2">and </span></div><div class="t m3 x16 h5 y1b ff2 fs2 fc0 sc0 lsb ws0">bandwidth <span class="_ _d"> </span><span class="ls6">utilization. <span class="_ _16"> </span><span class="ls10">The <span class="_ _9"> </span></span></span>result <span class="_ _c"> </span><span class="ls6">shows <span class="_ _d"> </span><span class="ls9">that <span class="_ _a"> </span>the </span></span></div><div class="t m3 x16 h5 y1c ff2 fs2 fc0 sc0 lsb ws0">performance <span class="_ _10"> </span><span class="lse">of </span></div><div class="t mb x18 hc y1d ff2 fs8 fc0 sc0 ls11 ws0">our </div><div class="t m3 x19 h5 y1d ff2 fs2 fc0 sc0 lsa ws0">scheme <span class="lsb">is <span class="_ _3"></span>superior <span class="_ _f"></span><span class="ls9">to <span class="_ _1"></span><span class="ls2">that <span class="_ _1"></span><span class="lse">of <span class="_ _2"> </span><span class="ls6">existing </span></span></span></span></span></div><div class="t m3 x16 h5 y1e ff2 fs2 fc0 sc0 lsa ws0">schemes <span class="_ _13"> </span><span class="lsb">such <span class="_ _11"> </span><span class="ls2">as <span class="_ _15"> </span></span></span>complete <span class="_ _11"> </span><span class="ls9">sharing <span class="_ _14"> </span><span class="ls0">policy(CSP), <span class="_ _9"> </span></span>guard </span></div><div class="t m3 x16 h5 y1f ff2 fs2 fc0 sc0 lsb ws0">channel <span class="_ _d"> </span><span class="ls6">policy(GCP) <span class="_ _17"> </span><span class="ls9">and <span class="_ _18"> </span></span></span>adaptive <span class="_ _d"> </span><span class="ls9">guard <span class="_ _d"> </span></span>channel </div><div class="t m3 x16 h5 y20 ff2 fs2 fc0 sc0 ls0 ws0">policy(A </div><div class="t mc x1a hd y21 ff4 fs5 fc0 sc0 ls12 ws0">CCP). </div><div class="t md x19 he y22 ff2 fs9 fc0 sc0 ls13 ws0">I. </div><div class="t me x1b hc y22 ff2 fs8 fc0 sc0 ls14 ws0">INTRODUCTION </div><div class="t m3 x1c h5 y23 ff2 fs2 fc0 sc0 lsa ws0">The <span class="_ _14"> </span><span class="ls0">provision <span class="_ _11"> </span><span class="lsb">of </span></span></div><div class="t mf x1d hf y23 ff5 fsa fc0 sc0 ls15 ws0">QoS </div><div class="t m3 x1e h5 y23 ff2 fs2 fc0 sc0 lse ws0">in <span class="_ _11"> </span><span class="ls0">mobile <span class="_ _11"> </span>multimedia <span class="_ _11"> </span>networks </span></div><div class="t m3 x16 h5 y24 ff2 fs2 fc0 sc0 ls6 ws0">becomes <span class="_ _14"> </span><span class="ls0">more <span class="_"> </span>complex <span class="_"> </span><span class="lsa">due <span class="_ _f"></span><span class="ls9">to <span class="_ _3"></span></span></span></span>user <span class="_"> </span><span class="ls0">mobility. <span class="_"> </span></span>The <span class="_ _10"> </span><span class="ls0">problem </span></div><div class="t m3 x16 h5 y25 ff2 fs2 fc0 sc0 ls0 ws0">becomes <span class="_"> </span>even <span class="_ _2"> </span>more <span class="_ _10"> </span>challenging <span class="_"> </span><span class="lsa">as <span class="_ _f"></span></span>recent <span class="_ _10"> </span>wireless <span class="_ _10"> </span>networks </div><div class="t m3 x1f h5 y26 ff2 fs2 fc0 sc0 ls6 ws0">are <span class="_ _8"> </span><span class="ls0">constructed <span class="_ _9"> </span>based <span class="_ _a"> </span>on <span class="_ _19"> </span>small-size <span class="_ _9"> </span>cells(microcel1s <span class="_ _b"> </span><span class="lsa">or </span></span></div><div class="t m3 x16 h5 y27 ff2 fs2 fc0 sc0 ls0 ws0">picocells). <span class="_ _15"> </span>Small-size <span class="_ _2"></span>cells <span class="_ _10"> </span><span class="ls6">increase <span class="_ _2"></span>the <span class="_ _2"></span></span>number </div><div class="t m10 x20 h10 y28 ff2 fsb fc0 sc0 ls0 ws0">of </div><div class="t m3 x11 h5 y28 ff2 fs2 fc0 sc0 ls0 ws0">handoffs, </div><div class="t m3 x16 h5 y29 ff2 fs2 fc0 sc0 ls0 ws0">which <span class="_ _3"></span>results <span class="_ _f"></span><span class="lse">in <span class="_ _3"></span><span class="ls6">complex <span class="_ _1"></span></span></span>and <span class="_ _3"></span>rapid <span class="_ _3"></span>handling <span class="_ _2"></span><span class="lse">in <span class="_ _1"></span></span>call <span class="_ _3"></span>admission </div><div class="t m3 x16 h5 y2a ff2 fs2 fc0 sc0 ls0 ws0">control(CAC), <span class="_ _4"></span><span class="ls6">thus <span class="ls0">increasing <span class="_ _1"></span></span>the <span class="_ _1"></span><span class="ls0">handoff dropping <span class="_ _3"></span>rate. </span></span></div><div class="t m11 x1c he y2b ff2 fs9 fc0 sc0 ls16 ws0">It </div><div class="t m3 x21 h5 y2b ff2 fs2 fc0 sc0 ls0 ws0">is <span class="_ _f"></span>important </div><div class="t m12 x22 hb y2b ff2 fs7 fc0 sc0 ls0 ws0">to </div><div class="t m3 x23 h5 y2b ff2 fs2 fc0 sc0 ls0 ws0">reduce <span class="_ _f"></span><span class="lsa">the <span class="_ _3"></span></span>dropping <span class="_ _f"></span>rate <span class="_ _2"></span>caused <span class="_ _3"></span>by <span class="_ _10"> </span>lack </div><div class="t m3 x16 h5 y2c ff2 fs2 fc0 sc0 lsb ws0">of <span class="ls0">available <span class="_ _10"> </span>bandwidth </span></div><div class="t m13 x24 h11 y2d ff2 fs5 fc0 sc0 ls17 ws0">in </div><div class="t m3 x25 h5 y2d ff2 fs2 fc0 sc0 ls0 ws0">the <span class="_ _f"></span><span class="ls6">handoff <span class="_ _f"></span></span>target <span class="_ _2"></span><span class="ls6">cell. <span class="_ _f"></span><span class="lse">If <span class="_ _f"></span></span></span>the <span class="_ _2"></span>cell's </div><div class="t m3 x16 h5 y2e ff2 fs2 fc0 sc0 ls0 ws0">available <span class="_ _1a"> </span>bandwidth <span class="_ _b"> </span>is <span class="_ _11"> </span>not <span class="_ _1a"> </span><span class="ls6">sufficient, <span class="_ _1"></span>enough </span></div><div class="t m9 x20 h5 y2f ff2 fs2 fc0 sc0 ls18 ws0">to </div><div class="t m3 x26 h5 y2f ff2 fs2 fc0 sc0 ls0 ws0">satisfy </div><div class="t m14 xf h12 y2f ff2 fsc fc0 sc0 ls0 ws0">a </div><div class="t m3 x16 h5 y30 ff2 fs2 fc0 sc0 ls6 ws0">handoff <span class="_"> </span><span class="ls0">call, <span class="_ _11"> </span>this <span class="_ _15"> </span>call <span class="_ _11"> </span>has <span class="_ _13"> </span>to <span class="_ _11"> </span>compete <span class="_ _13"> </span>with <span class="_ _11"> </span>other <span class="_ _13"> </span>calls <span class="_ _13"> </span>to </span></div><div class="t m3 x16 h5 y31 ff2 fs2 fc0 sc0 ls6 ws0">acquire <span class="ls0">the bandwidth. <span class="_ _f"></span></span>To <span class="_ _1"></span>solve <span class="ls0">this problem, <span class="_ _f"></span>several <span class="_ _1"></span>schemes </span></div><div class="t m3 x16 h5 y32 ff2 fs2 fc0 sc0 ls6 ws0">have <span class="_ _8"> </span><span class="ls0">been <span class="_ _19"> </span>proposed <span class="_ _c"> </span><span class="lse">in <span class="_ _8"> </span></span>literature <span class="_ _c"> </span>for <span class="_ _9"> </span>efficient <span class="_ _9"> </span>channel </span></div><div class="t m3 x1f h5 y33 ff2 fs2 fc0 sc0 ls0 ws0">assignment. </div><div class="t m3 x1c h5 y34 ff2 fs2 fc0 sc0 ls6 ws0">One <span class="_ _12"> </span><span class="ls0">well-known <span class="_ _a"> </span>scheme <span class="_ _19"> </span>is <span class="_ _7"> </span>priority-based </span></div><div class="t m15 x27 hd y35 ff4 fs5 fc0 sc0 ls19 ws0">CAC </div><div class="t m3 xe h5 y35 ff2 fs2 fc0 sc0 lse ws0">and </div><div class="t m3 x1f h5 y36 ff2 fs2 fc0 sc0 ls6 ws0">channel <span class="_ _3"></span><span class="ls0">assignment. <span class="_ _10"> </span>From <span class="_ _f"></span>the <span class="_ _10"> </span></span>user's <span class="_ _10"> </span><span class="ls0">point <span class="_ _10"> </span></span>of <span class="_ _3"></span><span class="ls0">view, <span class="_ _2"></span>dropping </span></div><div class="t m16 x28 h13 y37 ff2 fsd fc0 sc0 ls1a ws0">an </div><div class="t m3 x29 h5 y37 ff2 fs2 fc0 sc0 ls0 ws0">ongoing <span class="_ _11"> </span>call <span class="_ _15"> </span>is <span class="_ _13"> </span>more <span class="_ _13"> </span>undesirable <span class="_ _1a"> </span>than <span class="_ _13"> </span><span class="ls6">blocking </span></div><div class="t m17 x2a h5 y37 ff2 fs2 fc0 sc0 ls0 ws0">a </div><div class="t m3 x2b h5 y37 ff2 fs2 fc0 sc0 ls0 ws0">new </div><div class="t m3 x28 h5 y38 ff2 fs2 fc0 sc0 lse ws0">ca11[1][2][3][4]. </div><div class="t m18 x2c h14 y39 ff1 fs6 fc0 sc0 ls0 ws0">As </div><div class="t m3 x2d h5 y39 ff2 fs2 fc0 sc0 ls6 ws0">a <span class="_ _b"> </span><span class="ls0">result, <span class="_ _b"> </span>many <span class="_ _12"> </span></span>researches <span class="_ _1a"> </span>have <span class="_ _1a"> </span><span class="ls0">been </span></div><div class="t m3 x28 h5 y3a ff2 fs2 fc0 sc0 ls0 ws0">devoted <span class="_ _1a"> </span>to <span class="_ _13"> </span><span class="lse">CAC <span class="_"> </span></span>and <span class="_ _11"> </span>channel <span class="_ _11"> </span>assignment <span class="_ _11"> </span><span class="ls6">using <span class="_ _13"> </span></span>prioritized </div><div class="t m3 x28 h5 y3b ff2 fs2 fc0 sc0 ls6 ws0">handoff <span class="_ _10"> </span><span class="ls0">requests. <span class="_"> </span>Another <span class="_ _10"> </span>well-known <span class="_ _13"> </span></span>scheme <span class="_ _10"> </span><span class="ls0">is <span class="_ _10"> </span>bandwidth </span></div><div class="t m3 x28 h5 y3c ff2 fs2 fc0 sc0 ls0 ws0">reservation <span class="_ _2"> </span>based <span class="_ _10"> </span><span class="lse">CAC </span>which <span class="_ _f"></span><span class="ls6">resewes <span class="_ _2"> </span></span>bandwidth <span class="_"> </span>for <span class="_ _3"></span>handoff </div><div class="t m3 x28 h5 y3d ff2 fs2 fc0 sc0 ls0 ws0">calls <span class="_ _1"></span><span class="ls6">in </span></div><div class="t m19 x2e h5 y3e ff2 fs2 fc0 sc0 ls0 ws0">all </div><div class="t m3 x2f h5 y3e ff2 fs2 fc0 sc0 ls0 ws0">or some cells <span class="_ _1"></span>that <span class="_ _1"></span>MH <span class="_ _3"></span>might pass <span class="_ _3"></span><span class="ls6">through, <span class="_ _1"></span></span>resulting </div><div class="t m3 x28 h5 y3f ff2 fs2 fc0 sc0 ls6 ws0">in <span class="_ _1"></span><span class="ls0">potentially <span class="_ _10"> </span>lower bandwidth <span class="_ _2"></span>utilization <span class="_ _2"> </span>and <span class="_ _f"></span></span>higher <span class="_ _3"></span>new <span class="_ _3"></span><span class="ls0">call </span></div><div class="t m3 x28 h5 y40 ff2 fs2 fc0 sc0 ls0 ws0">blocking <span class="_ _1"></span>probability. </div><div class="t m1a x29 h5 y41 ff2 fs2 fc0 sc0 ls18 ws0">In </div><div class="t m3 xb h5 y41 ff2 fs2 fc0 sc0 ls0 ws0">this <span class="_ _1a"> </span>paper, <span class="_ _b"> </span>we <span class="_ _b"> </span>propose <span class="_ _b"> </span><span class="ls6">the <span class="_ _b"> </span></span>2-level <span class="_ _b"> </span><span class="ls6">call <span class="_ _1a"> </span>admission </span></div><div class="t m3 x28 h5 y42 ff2 fs2 fc0 sc0 ls0 ws0">control(2LCAC) <span class="_ _10"> </span>scheme <span class="_"> </span><span class="ls6">using <span class="_"> </span></span>the <span class="_"> </span>priority </div><div class="t m1b x30 h15 y43 ff3 fse fc0 sc0 ls0 ws0">to </div><div class="t m3 x31 h5 y43 ff2 fs2 fc0 sc0 ls6 ws0">guarantee <span class="_"> </span>the </div><div class="t m3 x28 h5 y44 ff2 fs2 fc0 sc0 ls0 ws0">consistent </div><div class="t m1c x2f h16 y45 ff5 fsf fc0 sc0 ls1b ws0">QoS </div><div class="t m3 x32 h5 y45 ff2 fs2 fc0 sc0 ls0 ws0">for <span class="_ _2"></span>mobile <span class="_ _2"></span>multimedia <span class="_ _10"> </span><span class="ls6">applications. </span></div><div class="t m1d x33 h17 y45 ff2 fs10 fc0 sc0 ls0 ws0">A </div><div class="t m3 x34 h5 y45 ff2 fs2 fc0 sc0 ls0 ws0">cell <span class="_ _2"> </span>is </div><div class="t m3 x28 h5 y46 ff2 fs2 fc0 sc0 ls0 ws0">assumed <span class="_ _8"> </span>to <span class="_ _7"> </span>be <span class="_ _7"> </span>small <span class="_ _7"> </span><span class="ls6">and <span class="_ _7"> </span></span>overlapped <span class="_ _8"> </span><span class="ls6">partially <span class="_ _7"> </span></span>with <span class="_ _9"> </span>its </div><div class="t m3 x28 h5 y47 ff2 fs2 fc0 sc0 ls0 ws0">neighboring <span class="_"> </span>cells. <span class="_ _f"></span><span class="ls1c">MH <span class="_ _15"> </span></span>calls <span class="_ _2"> </span><span class="ls6">are <span class="_ _2"></span></span>classified <span class="_ _10"> </span>into <span class="_ _2"> </span>new <span class="_ _10"> </span>calls <span class="_ _2"></span>and </div><div class="t m3 x28 h5 y48 ff2 fs2 fc0 sc0 ls0 ws0">hand-off <span class="_ _10"> </span>calls. <span class="_ _2"></span><span class="ls6">The <span class="_ _f"></span><span class="lsd">ZLCAC <span class="_ _f"></span></span>consists <span class="_ _f"></span>of </span></div><div class="t m1e x35 h17 y49 ff2 fs10 fc0 sc0 ls1d ws0">two </div><div class="t m3 x30 h5 y49 ff2 fs2 fc0 sc0 ls6 ws0">stages: <span class="_ _3"></span><span class="ls0">basic <span class="_ _10"> </span>call </span></div><div class="t m3 x28 h5 y4a ff2 fs2 fc0 sc0 ls6 ws0">admission <span class="_ _9"> </span><span class="ls0">control(BCAC) <span class="_ _9"> </span>and <span class="_ _a"> </span>advanced <span class="_ _c"> </span></span>call <span class="_ _a"> </span>admission </div><div class="t m3 x28 h5 y4b ff2 fs2 fc0 sc0 ls0 ws0">control(ACAC). <span class="_ _10"> </span><span class="ls6">The <span class="_ _11"> </span></span>former <span class="_ _13"> </span>determines <span class="_ _b"> </span>the <span class="_ _11"> </span>call <span class="_ _1a"> </span>admission </div><div class="t m3 x28 h5 y4c ff2 fs2 fc0 sc0 ls0 ws0">based <span class="_ _b"> </span>on <span class="_ _1a"> </span>available <span class="_ _13"> </span>bandwidth <span class="_ _12"> </span><span class="lse">in <span class="_ _11"> </span></span>each <span class="_ _1a"> </span>cell <span class="_ _1a"> </span>and <span class="_ _11"> </span><span class="ls6">the <span class="_ _11"> </span></span>latter </div><div class="t m3 x36 h5 y4d ff2 fs2 fc0 sc0 ls0 ws0">determines <span class="_ _11"> </span>the <span class="_ _13"> </span>call <span class="_ _13"> </span>admission <span class="_ _13"> </span><span class="lsa">by <span class="_ _13"> </span></span>utilizing <span class="_ _11"> </span><span class="ls6">delay <span class="_ _13"> </span></span>tolerance </div><div class="t m3 x28 h5 y4e ff2 fs2 fc0 sc0 ls4 ws0">time(DT) <span class="_ _4"></span><span class="ls0">and <span class="_ _2"> </span>priority <span class="_ _10"> </span><span class="ls6">queue(PQueue) <span class="_ _10"> </span></span>algorithms <span class="_"> </span>according </span></div><div class="t m12 x28 hb y4f ff2 fs7 fc0 sc0 ls0 ws0">to </div><div class="t m3 x37 h5 y4f ff2 fs2 fc0 sc0 ls0 ws0">the <span class="_ _1"></span>type <span class="_ _1"></span><span class="lsb">of <span class="_ _0"></span><span class="ls0">call blocked <span class="_ _3"></span><span class="lsa">at <span class="_ _0"></span><span class="lse">BCAC. </span></span></span></span></div><div class="t m3 x29 h5 y50 ff2 fs2 fc0 sc0 ls6 ws0">We <span class="_ _3"></span><span class="ls0">compare <span class="_ _f"></span>the <span class="_ _1"></span></span>performance <span class="_ _3"></span><span class="lsb">of <span class="lsd">ZLCAC </span></span>scheme <span class="_ _3"></span><span class="ls0">with <span class="_ _2"> </span>that </span></div><div class="t m3 x36 h5 y51 ff2 fs2 fc0 sc0 lsb ws0">of <span class="_ _1"></span><span class="ls0">the <span class="_ _10"> </span>other <span class="_"> </span><span class="lse">CAC <span class="ls6">schemes. <span class="_ _10"> </span></span></span>Simulation <span class="_ _2"> </span>results <span class="_"> </span><span class="ls6">show </span></span></div><div class="t m17 x38 h5 y52 ff2 fs2 fc0 sc0 lse ws0">that </div><div class="t m3 x39 h5 y52 ff2 fs2 fc0 sc0 lsa ws0">our </div><div class="t m3 x36 h5 y53 ff2 fs2 fc0 sc0 ls6 ws0">scheme <span class="_ _1"></span><span class="ls0">outperforms <span class="_ _2"></span>the <span class="_ _f"></span></span>others <span class="_ _1"></span><span class="ls0">by <span class="_ _2"></span></span>satisfying <span class="lsa">the <span class="_ _1"></span><span class="ls0">constraint </span></span></div><div class="t m1f x3a hb y54 ff2 fs7 fc0 sc0 ls1e ws0">on </div><div class="t m3 x36 h5 y23 ff2 fs2 fc0 sc0 ls0 ws0">call <span class="_ _15"> </span>blocking <span class="_ _13"> </span>probability </div><div class="t m20 x3b h12 y23 ff2 fsc fc0 sc0 ls0 ws0">of </div><div class="t m3 x3c h5 y23 ff2 fs2 fc0 sc0 ls0 ws0">new <span class="_ _13"> </span>calls(CBP), <span class="_ _13"> </span>call <span class="_ _11"> </span><span class="ls6">dropping </span></div><div class="t m3 x28 h5 y24 ff2 fs2 fc0 sc0 ls0 ws0">probability <span class="_ _f"></span><span class="ls6">of </span>handoff calls(CDP) <span class="_ _f"></span>and <span class="_ _1"></span>bandwidth <span class="_ _3"></span>utilization. </div><div class="t m3 x3d h5 y55 ff2 fs2 fc0 sc0 lsa ws0">This <span class="_ _3"></span><span class="ls0">paper <span class="_"> </span><span class="lsd">is <span class="_"> </span></span>organized </span></div><div class="t m21 x3e h18 y56 ff6 fsa fc0 sc0 ls1f ws0">as </div><div class="t m3 x3f h5 y56 ff2 fs2 fc0 sc0 ls0 ws0">follows. <span class="_ _10"> </span>We <span class="_ _10"> </span><span class="ls6">describe <span class="_ _10"> </span></span>related </div><div class="t m3 x36 h5 y57 ff2 fs2 fc0 sc0 ls0 ws0">works <span class="_ _15"> </span><span class="ls6">and <span class="_"> </span>our <span class="_"> </span></span>CAC <span class="_ _f"></span><span class="ls6">scheme <span class="_"> </span><span class="lse">in <span class="_ _15"> </span></span>Section </span></div><div class="t m22 x40 h6 y58 ff2 fs3 fc0 sc0 ls20 ws0">II </div><div class="t m3 x41 h5 y58 ff2 fs2 fc0 sc0 ls6 ws0">and <span class="_ _15"> </span><span class="ls0">Section </span></div><div class="t m23 x42 h10 y58 ff2 fsb fc0 sc0 ls21 ws0">111, </div><div class="t m3 x36 h5 y59 ff2 fs2 fc0 sc0 ls0 ws0">respectively. <span class="_ _c"> </span>Section </div><div class="t m1d x43 h17 y59 ff2 fs10 fc0 sc0 ls0 ws0">IV </div><div class="t m3 x44 h5 y59 ff2 fs2 fc0 sc0 ls6 ws0">shows <span class="_ _a"> </span><span class="ls0">simulation <span class="_ _e"> </span>results <span class="_ _a"> </span></span>and </div><div class="t m3 x36 h5 y5a ff2 fs2 fc0 sc0 ls6 ws0">compares <span class="ls0">the performance <span class="_ _3"></span><span class="lsb">of </span></span></div><div class="t m24 x3e h19 y5b ff7 fse fc0 sc0 ls22 ws0">OUT </div><div class="t m3 x45 h5 y5b ff2 fs2 fc0 sc0 ls6 ws0">scheme <span class="ls0">with <span class="_ _1"></span>that <span class="_ _f"></span></span>of the <span class="_ _4"></span>other </div><div class="t m3 x36 h5 y5c ff2 fs2 fc0 sc0 ls6 ws0">schemes <span class="_ _3"></span><span class="ls0">under <span class="_ _2"></span>various <span class="_ _2"></span></span>scenarios. <span class="_ _3"></span><span class="ls0">Finally, <span class="_ _10"> </span></span>Section </div><div class="t m25 x46 h9 y5d ff2 fs6 fc0 sc0 ls0 ws0">V </div><div class="t m3 x47 h5 y5d ff2 fs2 fc0 sc0 ls0 ws0">contains </div><div class="t m3 x36 h5 y5e ff2 fs2 fc0 sc0 ls0 ws0">the <span class="ls6">concluding </span>remarks. </div><div class="t m26 x48 h1a y5f ff6 fsd fc0 sc0 ls23 ws0">11. </div><div class="t m27 x49 h1b y5f ff1 fs3 fc0 sc0 ls20 ws0">RELATED </div><div class="t m28 x4a h10 y5f ff2 fsb fc0 sc0 ls24 ws0">WORKS </div><div class="t m29 x4b h5 y60 ff2 fs2 fc0 sc0 ls0 ws0">In </div><div class="t m3 x4c h5 y60 ff2 fs2 fc0 sc0 ls0 ws0">this <span class="_ _2"> </span>section, <span class="_ _2"></span>we <span class="_ _2"> </span>represent <span class="_ _10"> </span>other <span class="_ _10"> </span><span class="ls6">schemes <span class="_ _2"></span>such <span class="_ _2"></span></span>as </div><div class="t m2a x4d h1c y60 ff8 fs11 fc0 sc0 ls25 ws0">CSP, </div><div class="t m2b x36 h1d y61 ff9 fs9 fc0 sc0 ls26 ws0">GCP, </div><div class="t m3 x4c h5 y61 ff2 fs2 fc0 sc0 ls0 ws0">and </div><div class="t m2c x4e h5 y61 ff2 fs2 fc0 sc0 lse ws0">AGCP. </div><div class="t m3 x4f h5 y61 ff2 fs2 fc0 sc0 lsd ws0">In </div><div class="t m10 x50 h1e y61 ff8 fsb fc0 sc0 ls27 ws0">CSP[5], </div><div class="t m3 x51 h5 y61 ff2 fs2 fc0 sc0 ls6 ws0">new <span class="_ _10"> </span><span class="ls0">and <span class="_ _2"></span></span>handoff <span class="_ _2"> </span><span class="ls0">calls <span class="_ _10"> </span></span>are <span class="_ _10"> </span><span class="ls0">not </span></div><div class="t m3 x36 h5 y62 ff2 fs2 fc0 sc0 ls0 ws0">distinguished <span class="_ _f"></span><span class="lse">and <span class="_ _2"></span></span>are <span class="_ _3"></span>admitted <span class="_ _f"></span><span class="lsa">as </span></div><div class="t mb x52 hc y63 ff2 fs8 fc0 sc0 ls0 ws0">long </div><div class="t m2d x53 h1f y63 ff6 fs12 fc0 sc0 ls28 ws0">as </div><div class="t m3 x54 h5 y63 ff2 fs2 fc0 sc0 ls0 ws0">available <span class="_ _3"></span>bandwidth </div><div class="t m3 x36 h5 y64 ff2 fs2 fc0 sc0 lsb ws0">of <span class="_ _3"></span><span class="ls6">a <span class="_ _2"> </span>cell <span class="_ _10"> </span><span class="ls0">can <span class="_ _2"> </span>provide <span class="_"> </span>the <span class="_ _10"> </span>required <span class="_ _10"> </span>bandwidth <span class="_"> </span>to <span class="_ _10"> </span>the <span class="_ _10"> </span>MH. </span></span></div><div class="t m29 x55 h5 y65 ff2 fs2 fc0 sc0 ls0 ws0">In </div><div class="t m3 x36 h5 y66 ff2 fs2 fc0 sc0 ls0 ws0">other <span class="_ _10"> </span>words, <span class="_ _10"> </span><span class="lse">the <span class="_"> </span><span class="ls6">same <span class="_ _3"></span></span></span>priority <span class="_"> </span>is <span class="_ _10"> </span>given </div><div class="t m2e x56 he y66 ff2 fs9 fc0 sc0 ls0 ws0">to </div><div class="t m3 x57 h5 y66 ff2 fs2 fc0 sc0 ls0 ws0">both <span class="_"> </span>the <span class="_ _2"> </span><span class="ls6">new <span class="_ _10"> </span>and </span></div><div class="t m3 x36 h5 y67 ff2 fs2 fc0 sc0 ls6 ws0">handoff <span class="ls0">calls. <span class="_ _5"></span><span class="ls6">This <span class="ls0">scheme </span>has <span class="_ _4"></span>the <span class="ls0">low </span>CBP, <span class="_ _4"></span><span class="ls0">but high <span class="_ _3"></span><span class="ls6">CDP. </span></span></span></span></div><div class="t m2f x1c h20 y68 ff2 fs13 fc0 sc0 ls29 ws0">This </div><div class="t m30 x58 h21 y68 ff1 fs14 fc0 sc0 ls2a ws0">work </div><div class="t m31 x59 h22 y68 ff6 fs15 fc0 sc0 ls2b ws0">was </div><div class="t m32 x5a h23 y68 ff1 fs16 fc0 sc0 ls2c ws0">supported </div><div class="t m33 x24 h24 y68 ff6 fs17 fc0 sc0 ls0 ws0">by </div><div class="t m34 x5b h25 y68 ff1 fs18 fc0 sc0 ls2d ws0">grant </div><div class="t m35 x5c h26 y68 ff7 fs19 fc0 sc0 ls2e ws0">No. </div><div class="t m2f x5d h20 y68 ff2 fs13 fc0 sc0 ls0 ws0">R0l-2001-0200-00333-0 </div><div class="t m36 x5e h27 y68 ff1 fs1a fc0 sc0 ls2f ws0">from </div><div class="t m32 x5f h28 y68 ff2 fs16 fc0 sc0 ls30 ws0">the </div><div class="t m37 x16 h27 y69 ff1 fs1a fc0 sc0 ls0 ws0">Korea </div><div class="t m38 x60 h29 y69 ffa fs16 fc0 sc0 ls30 ws0">Science </div><div class="t m39 x61 h2a y69 ff3 fs18 fc0 sc0 ls0 ws0">&amp; </div><div class="t m34 x62 h25 y69 ff1 fs18 fc0 sc0 ls31 ws0">Engineping </div><div class="t m36 x24 h27 y69 ff1 fs1a fc0 sc0 ls0 ws0">Foundation </div><div class="t m3a x1f h2b y6a ff7 fs1a fc0 sc0 ls32 ws0">0-7803-7757-5/03/$17.200 </div><div class="t m38 x63 h29 y6a ffa fs16 fc0 sc0 ls33 ws0">022003 </div><div class="t m3a x64 h2c y6a ff2 fs1a fc0 sc0 ls0 ws0">IEEE. </div><div class="t m3b xf h2d y6a ff6 fsf fc0 sc0 ls34 ws0">457 </div></div><div class="pi" data-data='{"ctm":[1.559456,0.000000,0.000000,1.559456,0.000000,0.000000]}'></div></div> </body> </html>
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