캬웕톶 才놱二랽?才붻交춨通듳大学톧?学톧报놨?1?0?0?0?年쓪!l';l?.?f?t金:'111?却웚??J?Ot?:R??I\?AL??0?1?’? ?X?O?R?T?lf?E?I?C?\’? l?I??AO?T?O?K?G? ?t?:N?I?￥??ER?S?I??T?Y? ?V?o?l.ꎮ,??.? ?N?Oꎮ.2? ꆿ，.?垒?。??比뇈쳘特싊率뿉可뇤变ퟛ综뫏合业튵컱务网췸的뗄访럃问컊控뿘制훆?杜뛅摆平욽?(? j춨ifl?f:.勺?T뿘二也훆r?τ샭l';'쾵寄")? ?瘾햪?要튪? 本놾文컄讨볆论싛了쇋综ퟛ合뫏业튵务컱网췸人냋用췸节뷚点뗣뗄;J럃污问컊控뿘制훆问컊题쳢，ꎬ重훘点뗣在퓚采닉用폃뇈tt:쳘!辛싊辛뿉可뇤变횦技术쫵?ꇱ?对쪱的뗄控뿘刘훆方랽案낸民쾾在뢲拉뿘才可훆冬닎夜쫽卖뛔主쾵革춳统뗄的펰影쿬吟ꎮ.在펦m폃拎업F뛓人싛沦틔况뢲在볆诗쯣算믺机쒣模拟붷均뗄手쫖法램，ꎬ对뛔? 不늻同춬t뇈t4쳘辛쒲辛믬混듦存ꎮ、切쟐才뮻是뗈等뿘控훆制랽方낸案뷸速탐行?了럖分컶析ꎬ，明쏷确좷了?ퟩ1췸1.쪱同랽时낸方톡案퓱选择폫与닎参쫽数짨注定뚨?lt쾵革춳统뗄的影펰喝쿬，ꎬ并늢给엠出돶了쇋牵쾵线춳方랽案낸和뫍参닎寺쫽<"뗄J迂짨什볆参닎考뾼，ꎬ;틔(믱获뗃得革쾵线춳主뷌主싊率뗄均쳡提룟高ꎬ，改룄?善원传뒫输쫤质훊量솿、ꆢ稳컈定뚨性탔手뗈革쾵线性탔使쓜.ꎮ?关맘键볼词듊s?综ퟛ合뫏业튵务컱网춬，ꎬ这쯙豆싊手交뇤换뮻，ꎬ控뿘制훆方랽案낸.ꎮ?1? 插잰言퇔?随쯦着ퟅ信탅息쾢社짧믡会对뛔춨运倍탅以틔及벰信탅息쾢处뒦理샭要튪求쟳的뗄不늻断뛏增퓶볓加，ꎬ对뛔能쓜够릻综ퟛ合뫏뒦处샭理各룷种훖类샠型탍不늻同춬远춨信탅?业튵务컱的뗄综ퟛ合뫏业튵务컱网췸的뗄实쪵现쿖日죕益틦迫웈切쟐.ꎮ信탅包냼交붻换뮻技벼术쫵提쳡供릩了쇋将붫各룷类샠通춨信탅业튵务컱数쫽字ퟖ化뮯毛ꆢ以틔信탅包냼的뗄?形탎式쪽综ퟛ合뫏处뒦샭理的뗄잰前뺰景ꎮ.맺困쓚内췢外뚼部뛔对펦应폃摇탅信냼包붻交뮻挟벼技쫵术ퟛ综뫏合룷各샠类튵业컱务쇷流뗄的퇐研뺿究쟣倾힢注쇋了탭许多뛠力솦?量솿.ꎮ各룷类샠递춨信탅业튵务컱中훐比뇈较뷏有폐典뗤型탍意틢义틥的뗄是쫇数쫽据뻝和뫍话폯音틴.ꎮ最ퟮ近뷼，ꎬ在퓚语폯音틴数쫽字ퟖ化뮯、ꆢ压톹缩쯵比뇈特쳘率싊的뗄?研퇐究뺿上짏取좡得뗃了쇋令쇮人죋鼓맄舞컨的뗄进뷸展햹.ꎮ利샻用폃这헢一튻成돉果맻，ꎬ采닉用폃比뇈特쳘率싊可뿉变뇤来살传뒫输쫤诺폯言퇔信탅号뫅，ꎬ可뿉望췻提쳡高룟?整헻个룶综ퟛ合뫏业튵务컱网췸的뗄系쾵统춳佳탔能쓜.ꎮ本놾文컄基믹于폚这톡一튻现맛点뗣，ꎬ着ퟅ重훘i쳖寸싛论펦应폃用뇈比쳘特싊率뿉可뇤变벼技쫵术살来쪵实쿖现对뛔综ퟛ? 合뫏业튵务컱院췸的뗄访럃问컊控뿘制훆.ꎮ?目쒿잰前틑已폐有一튻些킩关맘于폚这헢个룶问컊题쳢的뗄研퇐究뺿报놨告룦.ꎮ在퓚文컄献쿗口??.ꎬ2?)?中훐ꎬ，틔以ퟛ综뫏合宽뿭带듸信탅号뫅和뫍狭쿁带듸信탅?뫅号为캪对뛔象쿳，ꎬ考뾼量싇主솽两훖种뇈比쳘特싊率뗄的믬混뫏合ꎬ，틔以벰及톹压쯵结뿭宽듸带탅信뫅号틔以뗍低뇈比쳘特싊率뒫传쫤输뗈等形탎式쪽.ꎮ他쯻们쏇证횤明쏷了쇋? 压톹缩쯵比뇈特쳘率싊能쓜提쳡高룟整헻个룶系쾵统춳的뗄效킧率싊，ꎬ但떫具뻟体쳥比뇈特쳘率싊可뿉变뇤的뗄控뿘制훆方랽案낸、ꆢ控뿘制훆的뗄口쏅粮쿞远횵、ꆢ以틔直벰比뇈?쳘特率싊压톹缩쯵引틽起웰的뗄通춨信탅品욷质훊恶뛱化뮯等뗈因틲素쯘均뻹未캴直볓u쳖Hi싛t-ꎮ.컄文自쿗主(?3?)?仅뷶讨쳖论싛语폯音틴信탅号뫅，ꎬ重훘点뗣放럅在퓚采닉用폃?比뇈辛쳘辛싊率뿉可뇤变쪱肘ꎬ，폯语틴音뒫传뢨输훊质솿量뛱恶뮯化폫与쾵系춳统뒫传쫤输킧效싊率쳡提룟高룴两헟者컊阔뗄的쿠枢뮥互붻交뮻换맘关쾵系ꎬ，춬同样퇹캴来注힢意틢?控뿘制훆方랽式쪽给룸系쾵统춳带듸来살的뗄影펰响쿬.ꎮ文컄献쿗?(?4?)냑把닉采폃用뿉可뇤变뇈比쳘特싊率ퟷ作캪为튻一훖种쇷流뿘控훆制쫖手뛎段ꎬ，쟒且냑把뫢衡量솿指횸?标뇪仅뷶局뻖限쿞于폚系쾵统춳的뗄稳컈定뚨性탔一튻项쿮 ꎮ ?本놾文컄收쫕到떽归죕到뫷?-IO-2B ??7
?캬웕톶 在퓚已틑有폐研퇐究뺿她뗄基믹础뒡上짏粤ꎬ本놾文컄把냑各룷类샠业튵务컱流쇷综ퟛ合뫏的뗄问컊题쳢进뷸→튻步늽'돩抽쿳象떽到룷各훖种뇈比待쳘率싊共릲存듦?、比뇈?辛쳘辛싊率뿉可뇤变뗄的튻→냣般뮯ít系쾵统춳上짏来살讨쳖沦싛.ꎮ应펦用폃排업队뛓论싛以틔及벰计볆算쯣机믺模쒣拟쓢舵뗄手쫖法램，ꎬ定뚨量솿地뗘送뷸行탐分럖析컶.ꎮ考뾼?虑싇系쾵统춳的뗄各룷评움价볛指횸标뇪阔컊的뗄互뮥换뮻关맘系쾵，ꎬ来살重훘点뗣讨쳖论싛访럃问컊控뿘制훆方랽案낸和뫍控뿘制훆参닎数쫽对뛔系쾵统춳的뗄影펰响쿬.ꎮ力솦?雷춼锋쫍明쏷各룷类샠相쿠互뮥关맘系쾵，ꎬ对쇐实쪵际볊建붨成돉综ퟛ合뫏业튵务컱网췸绘룸出돶建붨设짨性탔的뗄参닎考뾼意틢见볻.ꎮ?本놾文컄为캪5?节뷚结뷡将릹.ꎮ第뗚2?节뷚绘룸出돶系쾵统춳雀쒣型탍，ꎬ明쏷确좷讨쳖论싛内쓚容죝.ꎮ第뗚?3节뷚为캪理샭论싛董뷢事헛析ꎬ，룸绘돶出놸各类샠?控뿘制훆方랽案낸的뗄解뷢析컶项쿮吕쒿.ꎮ?驾뗚雪?是뷚节쫇是뷌数횵值뷡结맻果ꎬ，뚨寇솿量뗘地뷸进탐行뾼考察달.ꎮ第뗚E?节뷚为캪全생文컄的뗄结뷡论싛.ꎮ?2? 系쾵统춳模쒣型탍和뫍军풤备놸知횪识쪶?如죧图춼1?1쯹3暗쪾示ꎬ，폐有?M个룶用폃户뮧뷓t盖퓚在ퟛ综뫏合췸罚뗄的튻→룶个죋入췸网뷚节뗣点짏上ꎮ.퓚在헢这샯里춨通맽过뮺缓돥冲器웷的뗄排업队뛓，ꎬ传뒫?输쫤比뇈特쳘率싊约뗄控뿘制훆，ꎬ佼쪹用폃户뮧得뗃以틔高룟维킧率싊地뗘共릲享쿭进뷸网췸的뗄于룉线쿟{탅言뗀道ꎮ.헢这튻一쾵系쇐列뗄的맽过돌程部벴캪为本놾文컄要튪讨쳖?论싛的뗄访럃问컊控뿘幸훆q.ꎮ? e e 0. ,ꇱ? 1 A 1 z z ’ 情遂??2 一’ I -’ . , E . . , •••-P ꎬ????F fτT ~ ????뷅??RAte "，且Ra悟"!쮺Ia悟t'?，?훝p毒?훃且?瞄돩?兔좦?냋췸뷚뗣?춼蜀?2쫌{c专쫤辑剖떹?lJl 1 入网节立由평폚于采닉폃m信탅f냼9붻.뮻交ꎬ换탅，뗀信쫇道평是횡由ꎬ帧쪱、쾶时뷡黯结릹构ퟩ组돉成ꎮ.캪为뻙举샽钝뗃得볲简떥单쏷明쇋了웰起觅볻ꎬ，图춼2?示쪾出돶两솽?种훖比뇈特쳘率싊的뗄传뒫输쫤费샽电ꎮ.뇈比쳘特率싊筐횵分럖别뇰为캪町?~?ꎬ?Tl’ Y?Jꆣ?!r2? =ꎺ 2?.ꎮ其웤中훐a?倒샽与폫h?例샽뚼都是쫇생全탅信뗀道닉采用폃单떥?튻一比뇈特쳘率싊传뒫巍쫤的뗄精쟩况뿶，ꎬ同춬时쪱接뷓续탸的뗄用폃卢뮧数쫽分럖别뇰为캪F?与폫?2?F.ꎮ뛸 li c? 샽9l캪I솽为훖两뇈种쳘比特싊率퓚在탅信뗀道짏上뗄的?믬첨쪹폃ꎬ춬쪱뒫쫤뗄폃뮧쫽캪?????????ꎮ쫔냑헢룶돩쿳뮯쇋뗄튻냣쫽톧쒣탍폫쪵볊펦?’ 混合使用.院时传输的用户数为j(F<i<'.ZF)•试把这个抽象他了的)级数学模型与实际应폃题쿠相뛔对照헕，ꎬ可뿉以틔认죏为캪c?例샽相쿠当떱子폚比뇈特쳘率싊要튪求쟳不늻同춬之횮业튵务컱攘쇷的뗄综ퟛ合뫏传뒫输쫤，ꎬ而뛸把냑a?俩샽切쟐换뮻到떽性?僻샽?的뗄信탅遥뗀控뿘制훆动뚯作ퟷ解뷢锋쫍戎돉语폯音틴信탅号뫅传뒫输쫤肘쪱能뗄比뇈特쳘压톹缩쯵.ꎮ?垂ꎮ?自평图춼2?'뿉否횪知ꎬ.듓从룟斋뇈比쳘特싊率쟐切뮻换떽到뗍低뇈比쳘特싊率쪱时ꎬ，쿠格떱当폚于퓚在쾵系춳统늻不뇤变뗄的잰前쳡提쿂下ꎬ，퓶增设짨了쇋新탂时쪱?隙쾶.ꎬ뿉可춬同쪱时뷓接탸续뗄的폃用뮧户쫽数퓶增뛠多ꎮ.톡这뛔对폚于죫入网췸节뷚点뗣，ꎬ욿瓶뺱颈뷚节뗣点뒦处뗄的ퟨ阻죻塞컊问쳢题쳡提릩供쇋了뷢解뻶决춾途뺶径ꎮ.但떫?是쫇ꎬ，以틔뗍低比뇈特쳘率싊传뒫输쫤所쯹矗펮得뗃的뗄系쾵统춳传뒫输쫤效킧率싊的뗄改룄善짆，ꎬ是쫇以틔传뒫输쫤质훊量솿的뗄下쿂降붵为캪代듺价볛的뗄〈?比뇈如죧低뗍?比뇈特쳘率싊传뒫输쫤活폯音틴信탅号뫅的뗄自ퟔ然좻度뛈下쿂降붵)?ꎮ.所쯹以틔从듓ퟩ组网췸짨设计볆者헟的뗄立솢场뎡来살看뾴，ꎬ必뇘须탫采닉用폃灵쇩活믮的뗄比뇈特쳘?率싊控뿘制훆策닟路싔，ꎬ业튵务컱流쇷缓뮺慢싽对쪱采닉用폃高룟比뇈持쳘率싊尽뺡可뿉能쓜提쳡供릩高룟质훊量솿通춨信탅，ꎬ业튵务컱奇쇷在펵拥벷挤쪱时닉采폃用뗍低比뇈特쳘?卒싊，ꎬ以틔迅톸速쯙疏쫨远춨阻ퟨ塞죻，ꎬ保놣证횤效킧率싊.ꎮ本놾文컄讨쳖泣싛的뗄中훐心탄就뻍放럅在퓚此듋类샠控뿘利훆方랽案낸以틔及벰各룷控뿘制훆参닎数쫽对뛔系쾵?统춳的뗄影펰睡题쿬上짏.ꎮ?在퓚选뷸人죫分럖析컶之횮前잰，ꎬ先쿈定뚨义틥离폐关맘的뗄几벸个룶系쾵统춳评움价볛指횸标뇪，ꎮ?s??
캬웕톶 쯰损쪧失샎字?Bꎺ，좫全쳥体폃用뮧户닺产짺生的뗄总ퟜ业튵务컱量솿中뷭不늻能쓜正헽常뎣뷸ill죋人뮺续돥J申웷器업fJt뛓队뿕空间볤而뛸损쯰失쪧掉뗴的뗄比뇈率싊.ꎮ?뗈等듽待훢时퇓延?Wꎺ，듓从韶폃户뮧信탅Ê냼l.떽到듯迄ꎬ嘈횱在떽flJ퓚在탅信逗짏上믱获뗃得传뒫输쫤对쪱隙쾶为캪止횹的뗄等뗈待듽对쪱鼠볤.ꎮ?햼占폃用뇈比?ιꎮzꎺ뇈比辛쳘辛싊辛?rꎬ，뒫传输쫤的뗄对훢防쾶教勺쫽整폫个헻信룶息传탅输쾢I뒫l쫤f隙훢数쾶的쫽~I뗄:뇈.ꎮ??3 뷢解컶析??3ꎮ.1? 볙假짨设쳵条볾件?놾本컄文럖分컶析뗄的볙饭짨没죧如쿂下ꎻz??1ꎮ.? 뷚节点뗣接뷓续탸的用뗄户폃数뮧为쫽主'캪1ꋴ.ꎮ??2.ꎮ 룷各폃用뮧户탅信쾢息到떽듯达阎컊丽룴为캪均뻹횵1在?Jꎯ/?.{?si뗄的횸旨쫽数럖分늼布ꎬ，탅信쾢息뎤长럾服듓从均뻹횵lâ?1111?S뗄的指횸数쫽分럖?늼布，ꎮ? ?3.ꎮ? 뷚节뗣点内쓚的뗄绥뮺对돥1웷怒ퟮ最듳大뿉可죝容쓉纳?Z룶个用폃户뮧，ꎮ??4ꎮ. 룟者比뇈쳘特싊率?r?，쪱R'f쎿每顿횡有폐?F룶个훢时쾶隙ꎬ，뗍低뇈比쳘特싊率与??时쪱为캪?2?F룶个쪱对쾶隙ꎬ，쟒豆?r?，ꎯ/T?2??= ?2ꎮ.? 튻~ 一냣般地뗘认죏为캪信탅息쾢都뚼允퓊许탭损쯰失쪧和뫍排업队뛓等뗈指듽.ꎮ对뛔子폚现쿖实쪵灼뗄业튵务컱类샠型탍、ꆢ根룹据뻝具뻟体쳥的뗄信탅息쾢内쓚容죝，ꎬ?퓚在损쯰失쪧率싊、ꆢ等뗈待듽时훢延춢指횸标뇪上짏加볓以틔定뚨量솿限쿞树훆就뻍可뿉应펦用폃分럖析컶结뷡果맻.ꎮ伊샽i죧如쫽数뻝据뒫传쫤输튪要쟳求쯰损쪧失率싊为캪??毡ꎬ，实쪵时쪱语폯音틴要튪求쟳等뗈待黯듽延쪱小퇓子킡(폚)?.ꎮ?2?s ꎮ ? 各룷用폃户뮧튻一떩旦폐有탂新탅信쾢息랢发짺生.ꎬ벴部뷸进죫入活믮动뚯瓶웚ꎬ，횱直훁至룃该탅信쾢息뒫传输쫤췪究学뇏，ꎬ此듋间볤不늻再퓙发랢生짺탂新的뗄탅信?쾢怠ꎮ.按내信탅息쾢到떽达듯的뗄时쪱渴볤硕쮳序탲，ꎬ各룷用폃户뮧在퓚缓뮺冲돥器웷处뒦排업队뛓等뗈待듽.ꎮ若죴缓뮺冲돥器웷满싺员풱，ꎬ信탅怠쾢即벴告룦损쯰失쪧.ꎮ?뮺缓돥I中웷器뛓队쇐列샯墨뗈等듽待뗄的폃用뮧户ꎬ，튻一떩旦탅信道짏上폐有뿕空뗄约쪱时쾶报ꎬ，펡翔내接듎次탲序믱获뗃得헢这룶个쪱对쾶隙뗄的쪹使폃用좨权ꎬ，횱直至훁?헢这个룶信탅息쾢的뗄全생部늿信맀也냼传뒫送톡完췪毕뇏.ꎮ?根룹据뻝以틔上짏假볙设짨，ꎬ뒫传输쫤比뇈特쳘率싊豹뗄变뇤更룼对뛔应펦子폚信탅道뗀上짏时쪱隙쾶数쫽的뗄增퓶减복，ꎬ对뛔应펦子폚排업队뛓模쏾탍型中훐服럾务컱?窗뒰口뿚的뗄开뾪闭뇕，ꎬ可뿉以틔应펦用폃排업队뛓理샭论싛模쒣型탍解뷢析컶计볆算쯣.ꎮ??3.ꎮ2? 基믹本놾模쒣型탍的뗄第뷢桥컶?系쾵统춳状ힴ态첬可뿉由평?2룶个믹基놾本量솿?(jꎬ，?β?살来表뇭-헷iiꎮE벴.믮即뚯活动폃用뮧户쫽数;??(탅信뗀道짏上뒫传쯍送뫍和뮺缓돥冲웷器뛓队쇐列中훐?等뗈待듽的뗄用폃户뮧〉?、ꆢ탅f主뗀运对쪱戴쾶数쫽?1ꎮ.设짨其웤平욽衡뫢状ힴ态첬凝룅率싊为캪?P{?j?ꎬ，?仆?ꎮ，폻欲解뷢p??{ì?，ꎬ?n?ꎬ，需탨根룹据뻝具뻟体쳥?控뿘制훆方랽案낸，ꎬ绘믦出돶状ힴ态첬转移틆速쯙率싊图춼.ꎮ뷸进一튻步늽接내泼쇷的뗄守쫘恒뫣准ힼ则퓲，ꎬ写킴出돶平욽衡뫢方랽程돌式쪽，ꎬ辉뷢得뗃平욽衡뫢状ힴ态첬?概룅率싊.ꎮ?’. 有폐了쇋?P(?j?ꎬ，?iJ?ꎬ.系쾵춳统탔性能쓜评움价볛的뗄各룷指횸标뇪뚼都쓜能쿠相펦应뗃得떽到.ꎮ웤其中훐，ꎬ业튵务컱量솿强잿度뛈?ιꆢ损쯰失쪧싊率孔?ꎬ?系쾵统춳内쓚平욽均뻹活믮动뚯用폃户뮧数킧?A、J폃I뮧-욽I户뻹平쾵均춳系쓚统内춣停쇴留쪱对컊间?Tꎬ，等뗈待듽时쪱延춢?w、ꆢ占햼폃用뇈比?白ꎮ평白쿂下列쇐式쪽?、子ퟓ绘룸出돶，ꎬ?λ事뇭表헷征믮活뚯动폃用뮧户킧数为캪?2时쪱的뗄系쾵统춳总ퟜ到떽达듯率싊.ꎮ?c?=? :ꇆ2;A?,ꎮ :ꇆ2;P?(?i?,ꎬ? i>? ꎺ?????<1)L? ??AFH?i???中ꎬì??~)??????<2)i阳ꎬ?1~.为캪具뻟体쳥系쾵统춳参닎量솿，ꎮ控뿘制훆方랽案낸所쯹能쓜容죝i탭'f뗄的ퟮ最듳大锺횵.ꎮ??A= ~ꇆ;?2ꇆ;p?(?i?，ꎬ ??????( 3 ) il ??9 一一
?캬웕톶 T~ W~T__J_ A -(4) -(M-A)).’ 2F-k (5) ", ~ ~P(i罗F)+ ~三丁r-'P(:J (6 ) 。:!= j -OL 具体癖析偶基于前途基本模型的解，本小节焦点在于求平衡状态概率P() 两种比特率混存系统鉴于以高比特率T，传捺有较高的通信质量，产生了一个十分自然的选择.!!n尽可能以T，传验，f言道容纳不下时才采用r2传输. 控制方案表征为E1.~F肘，使i~F(全为比特率T，传输〉i二月F肘，位i~2F(金为比特率T2传输〉 F<i<2F时，缸片i (T豆和T2提存〉比特率从T，变到T，时，类似于语音信号的比特压缩，信息占有信道的时间与传输比特率灼变更无关，在为比特率~rJ传辘时的占有时间，由此，得出困3所示的状态转移速率望~.其中•À.~(M-k).t (7) (0三主主";;M)(8) P. ~kμ 3 P~3 λ. 且，Z~3 2F F 2 事2 4 5 7 2 .. 2 m 3 放态转移这卒理〈两种tt.:t辛辛混存〉比如:中，任意的i只对应一个1佳，将P心.0箭他为Pi，.得平衡状态方程式如下zJ..p. ~ l’H’P, (0ε二是<2F)(9) H ._,P._, ~ I"FP" (2F运k";;2F+ Z) (10) 结合边界条件(11) ~P，=l 解得(tZ) M怡(士-);'~C.~r +立(士YCL!是~(ZF)'P-k+1 ) 10
캬웕톶 붫将?Po?듺代죫人ꎬ，뷢解뗃得?Pꎬ霉뗄的튻一냣是量뇭表듯达쪽式캪为?2(在三二i~2F)(13) P. ;p?oꆣ?(룦士?)'?c???ꇜ?ꇜ?????????丰P.; ?Pnꆣ!?룦ι)?'ꆮc?主z?i?u?n2FZ ?(?2?F?<?iꇜζ?2?F?+Z?)?? ?????(14) 飞μ/-.~ (2F)! ?3ꎮ.?3ꎮ.2? 훍普普뫳后믺棍쓜能?닉采폃用뿉司뇤奕뇈比쳘特싊率벼技쫵术뒫传쫤输폯语틴音탅信뫅号쪱时ꎬ，죴若뇈比쳘特싊率뇤变룼里맽过폚子욵颊랱繁ꎬ警죝容틗易닺产짺生튻一훖种쟐切뮻换퓫噪?짹声ꎬ，쪹使춨通话뮰质훊量솿下쿂降붵.ꎮ为캪防럀止횹此듋种훖现쿖象쿳的뗄友랢生짺，ꎬ可뿉稿짔把냑比뇈辛쳘辛싊率뇤变룼更뚯动ퟷ作동迟뮺缓튻一킩些ꎬ，쪹使뿘控훆制맽过?돌程늻不훁至폚于맽过뛈度쏴敏룐感ꎮ.퓚在듋此컒我쏇们떼导죫入훍滞뫳后뿘控훆郁믺机?能，쳖讨싛论튻一룶个솽两훖种뇈比쳘特싊率쿠相뮥互쟐切뮻换뗄的뿘控훆制方랽?낸案ꎮ ? 问?蛊평?11?쿲向?1?，뇤变룼更뗄的쏅n쿞限筐횵，? 向ꎺ远평?1?，쿲向?7?1뇤受룼冤的뗄쏅n쿞限值횵.ꎮ???뿘控훆秘랽方낸案뇭表征헷为캪ꎺ2?ꎺ?ꇱ?j?<?盔뫍和ꎬ;ꎺ=?F훢对ꎬ，놣保持돖?jꎺ=?FJꎬ? jꇝ注部?和뫍;ꎬ=??F쪱肘ꎬ，쪹使ꎬi?= ?2?FJꎬ? ?ꆫ??i?>v?뫍布?iꎺ=?2 ?F쪱肘ꎬ，保놣持돖?i?=? 2?Fꎬ,? ꆪ????iꇜ芸:;?;;v뫍租?i?=2??F肘쪱ꎬ，쪹使ꎬi?=?F.ꎮ? 춼留?4캪为ힴ状첬态转틆移쯙速率싊圈춼.ꎮ各룷转移틆速쯙率싊与폫?3.ꎮ?3.ꎮ1?샽f珩춬同퇹样뚨寇틥义ꎮ.평自폚于듋此处뒦?j只횻有폐F?与폫?2?F?솽两个룶횵值，ꎬ为캪方랽뇣便웰超觅볻ꎬ，将붫?P?心?ꎬ.?F)?볲简뮯化为캪?P.?.，?P?Uꎬ，?2?F)?캪为?P;?2?.ꎮ子폚쫇是ꎬ，뷢解욽平衡뫢状ힴ态첬方랽程돌式쪽?뗃得?z?(?O?<i?ζꇜ?F)?? ?????P'1=~ (15) i _0 ~k+l ??P??쿘튻??튻?ꎮ??좢튻??룦ꎮ??(F<i乏对?(1?岳)P'l::.n足-~豆手专.... F'k+且J=Pf’.L: J "-4 马A啄... .10 ??￡ o 雹2 4 s 3 ii 7 穹10国춼4?号ힴλ态첬转。돞这쯙辛싊æ좦(?떼导入냋4훍苦后뫳机믺就쓜〉?????11 一←一
?캬웕톶 ?????????儿PMl(17) = p"P?????,,!. ?ꆣ????????ω<?i?~ꇜ三2??F)?(??8?)?? P"l;!. = P，，:!.豆ιꆭ????2-F-1一.-1 P??2=?P?'??2?0τꇂ立?起튻了??日乒(??2?F?<国???2?F+?Z?)??(??1?纱??ꇱ튻??튻?ꆭ??뗘? fJk-r !=~F 严二Fꇆ?ꆣꎬ?ꇆ??ꆿ??????(20) :Z;p,,+ :Z; P’2=1 1_0 r_ł 联솪立솢解뷢以틔上짏表뇭达듯式쪽，ꎬ即벴可뿉得뗃到떽所쯹需탨的뗄平욽衡뫢状ힴ态첬概룅率싊筐횵.ꎮ?3?.ꎮ3?.ꎮ?3控뿘都훆模쏾式쪽?自평틔以上짏两솽控뿘锁훆方랽案낸得뗃到떽启웴发랢，ꎬ可뿉以틔考뾼应싇对뛔应펦于룉各룷类샠具뻟体쳥铺쟩况뿶的뗄控制뿘方훆案랽，낸图ꎮ1춼)?쇐~l出돶쇋了几벸?룶틔볲떥쪾틢춼뇭헷뗄ힴ첬틆쯙싊춼ꎮ뫡훡캪믮뚯폃뮧쫽?ꎬퟝ훡캪탅뗀짏뾪춨뗄쪱쾶?4 个以商单示意图表征的状态转移速率困.横轴为活动用户数，，纵轴为信道上开通的时随数뷌i?.ꎮ方랽낸案也??〉?仅뷶为캪单떥→튻比뇈特쳘率싊?T?，传뒫输쫤，ꎬ方랽案낸〈??协?是쫇两솽个룶比뇈特쳘率싊γ?2?与폫T?2?的뗄쟐切换뮻，ꎬ切쟐换뮻n쏅限쿞?值횵只횻有폐→튻个룶Eꎮ方랽案낸(??c?)떼导죫人훍带뫳后믺机쓜筐ꎬ，랽方案낸(?d?)?为캪两솽种훖比뇈特쳘率싊混믬存듦.ꎮ?(e?)?(?f??)쫇是죝容i탭午솽两훖种比뇈特쳘?ꆤ?싊믬듦ꎬ폖폐훍뫳믺쓜뗄뷏캪뢴퓓뗄뿘훆랽낸ꎮ? 率混存，又有滞后机施的较为复杂的控制方案审쒿U췅才풰囡?…풰υ才一??(ꎮ.ꆿ)? ?ꆯ?((d) f) 춼愚5? 뿘主主훆幸才쒣模쪽式?폐有쇋τ状ힴ态첬转移틆速쯙率싊图춼，ꎬ就뻍可뿉以틔用前폃两잰Ø솽i샽J民춬样퇹袖뗄手쫖法램，ꎬ获믱得뗃平욽衡뫢状ힴ态첬始뗄概룅率싊了쇋，ꎮ?, 4? 数쫽值횵结뷡果맻?룹根据뻝前잰节뷚的뗄岛뷢事컶析랽方램讼ꎬ，뷸送탐行쫽数횵值볆计쯣算ꆤ.탔佳쓜能움评볛价쪱肘톡选퓱择뗤典탍型뗄的폯商틴音닎参数쫽ꆿ1?/.1=? ?1.ꆤ6?7??Sꎬ.? 1?1?1?’?= 1?.ꎮ?3?4?S.ꎮ ?71?쿠相当떱于폚6??4k?b?p?s?，ꎬ?T 2 퓲!iI캪~为3?2?k??bp?s?.ꎮ?4?.ꎮ1? 各룷훖种控뿘翻훆方랽攘낸的뗄此뇈法뷏?对뛔前잰→튻1뷚括훐中틔以볲简떥单쒣模쪽式쪾示틢意춼图给룸出돶的뗄6?个룶랽方案낸뷸进行탐了쇋比뇈뷏较.ꎮ计볆算쯣出돶的뗄佳탔能쓜指횸标뇪B?，ꎬ?W、ꆢ?白뿚?示쪾于폚表뇭1?ꎮ.在퓚传뒫输쫤质훊量솿相쿠差닮不늻大듳的뗄情쟩况뿶下쿂〈归?徨횵差닮异틬不늻大듳)?ꎬ，两솽种훖比뇈쳘特싊率믬混存듦在뗄J(?d?)? ?(e?)? ?(?f?랽)方낸案퓚在쪱时퇓廷?W上짏大듳大듳优폅于폚单떥纯뒿两솽比뇈铃쳘率싊阔컊的뗄切쟐换뮻控뿘制훆，ꎬ(?e?兴???。?方랽案낸在퓚损쯰失쪧率싊B?方랽酒쏦也튲明쏷?显쿔改룄善짆.ꎮ但떫混믬存듦方랽式쪽在퓚硬펲件볾实쪵现쿖上将짏金붫比믡较뇈巢뷏杂뢴幸퓓日뫍困삧难쓑.ꎮ????12:
캬웕톶 卖뇭1??ꎺ?ꎮ???ꎺ????ꎺ亏??I\.f =二。F= 10 z=1孔횴?ꆧ?????????γ1—( ?二￥rn 凹的?。E?r? 1? f쿞民1횵自?(? a?)?? 2?.?ꎮ盒6??'??H?-?lJ ??ꎮ??? ?????ꎮ?????????(b>Q嘈O{l075ꎮ???0?.6?2?? f<=l’=13 (? ?c)?? {?I?.û?{?lO?召?5????????ꎮ???事。事731’=16 1,,=15 (?d?l?? ?????????ꎮ???????{(1073 { (?c?)?? <?3ꎮ???????ꎮ????????.0< (}.ß8T <L5[ ?????ꎮ???????ꎮ?????ꎮ???(f) 夺.OOü{ e量47?4.ꎮ2? 짨设볆计参닎考뾼?W(lIll)B(%> ퟩ췸쪱ꎬ뎣튪쟳짨볆헟퓚싺ퟣ룸뚨탔쓜?150 组网时，常要求设计者在端足绘寇性能a 횸指标뇪条쳵件볾下쿂ꎬ，求쟳出돶最ퟮ优폇或믲合뫏理샭范랶题캧内쓚的늰系쾵统춳?J(-~5 닎쫽ꎮ놾컄훐ꎬ뮺돥웷죝솿ꎬ뿘훆쏅쿞횵뚼?’-10 41 100 参数.本文中，缓冲器容量，控制门限值者在'-1喜是쫇这헢样퇹t뗄r쾵.J춳系닎统쫽参ꎮ数듋.此뒦处뻍就뿘控훆制랽方낸案?(c?)?酌뗄?--10 .. 뮺돥웷죝솿톡퓱뻙튻쫽횵샽쪾폚춼?ꎬ죴죝?4 缓冲器容量选择举一数值织示于圈6，者容. 50 탭뗈듽쪱퇓킡폚?????ꎬ쯰쪧싊킡폚??ꎬ?l/. 许等待时延小于1号。ims"损失率小于5%，主퓲평춼뿉횪뮺돥웷죝솿?뗄듳킡풼캪?믲??面咱圄匾刚出回可知缓冲器容量Z的大小约为5或在61 a 뷏캪뫏쫊ꎮ?ꆢ?u z 电a E串12 a E 较为合适.?뒬S?쓅国?z 4?.ꆤ3? 훍滞뫳后믺貌쓜麓的뗄考뾼察달?춼?뮺돥쿹죝-솿?ꆪꆪ因6缓冲n容量Z一--뻨损?失?率??B?.ꆣ?훍滞后뫳机믺能쓜韵뗄提쳡出돶在퓚于폚防럀止횹切쟐换뮻噪퓫声짹，ꎮ南평?뗈等待듽对쪱足퇓?W于폚系쾵统춳稳컈态첬解뷢无컞法램阎닻明쏷动뚯态첬状ힴ况뿶，ꎬ本놾文컄采닉沼폃计볆算쯣机믺仿럂真헦来살送뷸行탐考뾼察달.ꎮ噩춼7?是쫇各룷比뇈特쳘率싊持돖续탸传뒫?送쯍锁횡数뷌能뗄直횱方랽昆춼.ꎮ由평圈춼可뿉知횪，ꎬ导떼入죋滞훍后뫳祝믺能쓜后뫳，ꎬ持돖续탸传뒫送쯍被횡数쫽小킡于폚?10?的뗄ힴ状뿶况뚼都늻不뛠多，ꎬ쾵系统춳?基믹本놾上짏稳컈寇뚨在퓚某쒳一튻比뇈特쳘率싊上짏长뎤时쪱间볤地뗘传뒫送쯍，ꎬ不늻会믡出돶现쿖频욵繁랱切쟐换뮻的뗄状ힴ况뿶，ꎬ由평此듋~뿏主뚨了뚡滞훍后뫳机믺能쓜?l1." M-白’-15 SR Z-lD l/. g 忌"气~ 1/，，-1.剖，4 2 ~工9 回?E辜?8??1GG 100 1SG 10 白?E?血즽??뫷톪ꆮ훱??????....蟹 -四".(1性g圃.>的??无?猾ힵ暑뫳农믺植쫠?白춼7?持돖续탸玲在쫤?帧횡主쫽主뗄功횱立랽方回춼?13 专二
캬웕톶 ..0 0 AI司码.-嚣1I ’-15 1U-15 Z_10 E I/A_1. ’81 a 1I,.: 34. 2 a S?蚕?.4ꇱ1??50 .100 150 -，(目23 2 z a .0 HlO 150 200 .1000 ꇱ?????????????????????뷐?쏩?? C国出四哩In回V挝.s(田〉主??到?〉떼导?人죬海军뫳事믺l能뒬?画춼7??돖持탸续传쫌输쫤帧횡敦쫽的뗄立횱方랽图춼?导떼人죫对뛔系쾵统춳所쯹起웰的뗄毡컈~뚨作ퟷ用폃.ꎮ?5? 结뷡束쫸语폯?本놾文컄讨쳖论싛了쇋综ퟛ合뫏业튵务컱凋췸入죫网췸节뷚点뗣在뗄J访럃问컊控뿘制훆毫ꎬ主훷要튪应펦用폃了쇋比뇈转쳘率싊可뿉变뇤的뗄控뿘制훆手쫖段뛎，ꎬ声音뛔不늻?同춬뇈比쳘特싊率믬提듦存ꎬ、쟐切换뮻뗈等方랽案낸进뷸行탐了쇋解뷢析컶与폫H볆算쯣机믺쒣模拟쓢的뗄分럖컶析.ꎮ뺮并用폃数쫽值횵结뷡果맻进뷸行탐了쇋考뾼察달，ꎬ本놾?文컄所쯹取좡得뗃的뗄结뷡论싛可뿉以틔归맩纳쓉为캪如죧下쿂几벸点뗣?z①ꋙ各룷种훖控뿘制훆方랽案낸和뫍系쾵统춳参닎数쫽对뛔系쾵统춳有폐很캢大좮影펰院쿬，ꎬ只횻有폐选톡择퓱适쫊当떱的뗄方랽案낸及벰参닎数쫽，ꎬ才닅能쓜实쪵现쿖?系쾵统춳性탔能쓜的뗄改룄善짆.ꎮ?②ꋛ滞훍后뫳机믺能쓜可뿉以틔有폐效킧地뗘防럀止횹[틲~쫤输죫入业튵务컱流쇷变뇤动뚯辰뛸i맽i:뛈t뛮皮랱额繁뚯动ퟷ作뗄的뿘控告훆tힴ状态횾，ꎬ确좷保놣系쾵统춳约뗄?컈隐定뚨性탔.ꎮ?, ③ꋠ给룸忘뚨系쾵统춳性탔能쓜指횸标뇪要튪求쟳，ꎬ应펦用폃本놾文컄在뗄j解뷢컶析手쫖램讼，ꎬ可뿉以틔求쟳出돶控뿘制훆方랽案낸之횮系쾵统춳参닎数쫽的뗄设짨计볆?参닎考뾼落랶国캧.ꎮ?닎参考뾼文컄就쿗??????????????ꎬ??????????ꎮ????????????????????????????????????ꆪ?????????????????????????1 K:raimecbe B. S号坠暂a:. Bandwidth Allo咀tionStrategies in Wide- and 1时egra甘dNetw盯ks.????????????ꎮ???튻?ꎬ????ꎮ?ꆶ??ꎻ????????JEEE . SAC斗，19时.4<t -); 869-878 ?????????????ꎬ?????????ꎮ?????????????????????????????????2 Kraimf'cbe丑，Schw町'z】吨.Analysis of TraIIk A<:cf’sS coat-rol Stutq~;ii:s in lntegTated S町，.-ì:白?N.?'?τ?:r?or?k?.ꎮ ??????????ꎮ???튻??ꎮ????ꎬ???????????????IEEE Trans. COM-33, 19a5~ (lfl): 108,j-.....1093 ???????????ꎮ??????????????????????????????????????????????????????????????????????????:.5 Hotzman 1 M, Tb乙IntenctioilLl!lweξn Q扯I!f'in~an: VOICt> Q咀li叮血Varü~.L{eBit R叶cP阳kct???????????ꎮ????ꎮ??????ꆿ?ꎬ?????ꎬ?????ꎺ???ꎺ??ꎮ?Vokc S歹目。盟.P:roc. of ITC 11, Kyota. I9.- ;:;, :1!j). ::!_\. Lꎮ ?Iꆫ-8?A?.ꎮ ?Lꎮ4?? ( ??????????ꎬ??????????????????ꎮ????????????????????????????????????????????????????????4-BiaUy T. Gold B anJ 5 A Tec氢臼i嘻11e-for Adapti ....: : VOIC’" Flow COrltroJ in时ξr，rateù???????????????ꎮ??????????ꎮ???튻??ꎮ????????ꎬ????????Pat:k..ct Nctworks. IEEE Tra四，口}I:l25-33~ ???14 一-一"
캬웕톶 ?Ac?c?e?s?s?? ?C?o?n?t?ro?l? ?S?tr?a?t?e?g?i?es?? ?f?o?r????????????????ꆪꆪ???????? Integrated Multi-Traffic ?Ne?t??可T?o?r?k??U?s?i?n?g? ?Va?r?i?a?b?l?e??丑??i?t??R?at??e? ?T?e?c?h?n?iq??ue??s? ????????????Du Rongp ng ????????????????????????????????????????(Departme1lt of Com皿uI1ications&l1d COlltrol) ?A?b?.t??ra??c?t? ! ????????????????????????????????????????????????????????????????????????????????This paper deals with acceSS εOßt!Ol strategies for舍ntrancenode 01 integrated ????????????????????ꎮ????ꎬ??????????????????????????????????????????????????????mult -traf1ic network. Her念，var able bit rate techn ques are used to ncrease the ??????????????????ꎮ?????????????????????????????????????????????????ꎬ???????????system flexibility. USing queueing analysiS and simulation experiment, the system 뿚pe??r?f?o?m?a?nc??e? ???????????????????????????????????????????ꎬ??????????????????????ꎬ?is evaluated for several control srrategies. with numerical results, 卸???me????????????????????????????????????????????????????????????????????????????????tradeoffs a自investigatedto杏出videavai1able engin出ringrefetence for the ?i?mp?r?o?v?e??田?en?t??????????????????????ꎮ?of system performance. ????????????????????????????ꎬ????????????????????????????????????????Key word., integra ted net宵。沽，variable bit rate, access control schemι ꇶ?- 如15
