Table Of Content

NOITACIFICEPS FO EHTASI-R-CVA CAM REYAL LOCOTORP .A onadroiG ,)DTlI( .A illivomI ,)WVPIWI( .C eliboN ,)PAQlWI( .G aviredeP ,)NAQlWI( S. Zappatore )RTPlWI( ]ti.eginu.tsid@la[ .peD ,n or iefttoaucpimno uCdmnma osCme tescynSeicS )FLHIKI( ytisrevi nfUoaoneG aiV arepO Pia, 1 A/I - 54161 ,aoneGylatI tcartsbA ehT repap slaed htiw eht ASI-R-CVA ssecca ,locotorp depoleved ni order to maximize the one-step throughput dna to evlos eht neddih snoitats ,smelborp ni a tekcap oidar krowten ralullec.erutcurts retfA a feirb noitpircsed fo eht llarevo ASI-R-CVA ,ygetartseht lautca locotorp enihcam si detneserp rof htob sdnik fo snoitatsretsam( dna )sevals taht era detneserp ni eht .krowten A trohs noitpircsed foeht frame structure is also shown along with a brief discussion about yranimilerp laer dlrow ecnamrofrep .stluser .1 noitcudortnI The AVC-R-ISA protocol, proposed and described in ,]l[ stneserper a ygetarts rof eht ssecca sthgir noitubirtsid no a nommoc lennahc ni redro ot ezimixam eht pets-eno etagergga .tuphguorht ehT devised strategy is characterized by its ytilibatpada to channel load snoitair atvaht yam eb eud ot egnahc ni oidar noita tystisne dro/dnatekcap noitareneg .etar ehT detneserp ssecca-itlum locotorp srefer ot aralullec krowten erutcurts dna sdeen a dezilaiceps ,noitats ni ,llec derrefer to ealch in the following as master station ro base ,noitats that acts as a synchronization entity and as a feedback dna sutats noitamrofni ,rotanimessid esuaceb fo eht ylsuoiverp denoitnem ,sksat eht esabnoitats is constrained to eb placed in a site from which it can directly etaci nhutmimwoc yna re hntooitats ni eht.llec In the following, after a brief overview of the overall access ,ygetarts eht muideM sseccA lortnoC locotorP )PCAM( dna eht emarf erutcurts rof ASI-R-CVA era .debircsed nI eht tsal noitces eht etelpmoc locotorp enihcam si detneserp sa ti saw detnemelpmi ni eht 816019 noisrev fo eht SON/teN egakcap yb lihP .nraK 52 2. ehT ASI-R-CVA ygetarts ehT sseccA lautriV tnednepednI-tenoidaR-lennahC snoitatS mhtiroglA si a CAM reyal locotorp detoved ot eht noitulos foeht elpitlum ssecca melborp rof a gnihctiws-tekcap oidar .krowten stI ytirai lsuicep y teihltib aoptac tpada ot e hctiff androatiotla ieruadvot segnahc htob ni eht rebmun fo evitca snoitats dna ni eht emarfnoitareneg rate. ,eromrehtuF ekilnu morf rehto CAM reyal slocotorp .g.e( )AMSCeht AsSeIc-nRa-mCrVoAf ree rpeavitisnesn iot eht ecneserp fo”neddih“ stations (i.e., snoitats taht tonnac hsilbatse poh-eno oidar .)sknilsA ydaerla ,denoitnem eht ylno tniartsnoc fo siht locotorp si eht deen otecalp eht ensoaibta tnsi eal b,aett iimuso srhfcihw teita chnitanicuwmmoc yna rehto )evals(.noitats ehT ASI-R-CVA syolpme n ae vdietzaimlraorft nnaietcaderutcurts deganam( yb eht esab )noitats gnola htiw emos ronimdezilartneced information. ehT evals snoita testarepooc htiw eht retsam gnidrocca ot ehtASI ]2[ ,ygeta rrtosf eh t.l teenncenrmaunh ogcesihesTrsa AS Ilortn oeclursi deilppa ot a noitalupop fo evals snoitats gnikrow no a dettols.lennahc roF hcae tols ew wonk eht lennahc su t,antositamro frneidnueht sisehtopyh taht eht emarf ecneserp ni a noitats reffub siyllacitsitats tnednepedni fo eht etats fo eht rehto sevals dna taht eht noitats sahna yratinu emarf ,reffub os taht yna ema rdfetaren eeglihw eht reffub silluf is discarded. ehT laog si ot ngissa eht thgir ssecca to eht ,snoitats ni redroot ytifloi b, ayeblhottrnpeu qt eudspnnhaogc upoer the stze-ihemtnioxam no i.sniolilsosci-mosnna rstihT si dehsilpmocca yb gnitatpu a rotcev)t(p e ssoth nwte(nneospemropce reht lyatniilgirbaambo rfpo eht ecneserpfo eht tekcap ni a evals )noitats no eht sisab fo eht ’snoitats semarf noitareneg etar dna fo eht lennahc kcabdeef gnitroper eno fo eht gniwollof eerht setats : ytpme ,tols noisilloc ro lufsseccus.noissimsnart A rojam melborp rof a oidar dettols krowten si gnisived aelpmis dna tnei cniofifteazino r:hmcsniynsahcem eht ASI-R-CVA seveihcasiht detanidrooc msinahcem yb gnivah eht esab noitats dna eht sevals gn inzoiintoarl huncpono yprse i rreirv eai)hctCt-cOfeEop(-ssdtennreeve .]3[ ehT emit lavret nniewteeb s roew itervriatcu-cfeo s-yntborcatseht .d”e tz”eoil hlla reTsa vl esrrraltaeoenlsbntoiaeni wmgisde“iebclelda“c station, besides acting as a synchronization entity, provides the gnitsacdaorb fo kcabdeef gnola htiw emos labolg krowten ,noitamrofnisa see hv.etayr l lat, s,toenlcnl oae bnirroaiteit andt meesrggiohftni ehT ASI-R-CVA lortnoc elur sngissa ssecca sthgir ,yllaudividnidna siht seriuqer taht eht snoitats ssessop a lacol reifitnedi ot eb dengissanopu gniretne a.llec ehT cimanyd tnemngissa fo lacol sreifitnedi nac eb deweiv saa lautriv “lennahc ”re b.mtunnemngissa ehT snoitats taht tnaw ot retneeht 53 krowten yam esu a laiceps ,reifitnedi yas ,0 ot ksa eht rellortnoc ot esaeler na laut.craeifitnedi suhT eht reifitnedi rebmun 0 si yliraropmet nommoc ot llasresu taht evah ton tey neeb den griiseshat n wloe.nrneabhmcun ehT gnimocni snoitats nac etareneg a noitcennoc tseuqer ybsnaem fo na ASI-R-CVA tekcap detoved ot siht ,laog revenehw lennahc 0 si delbane yb eht llarevo ASI .mhtirogla ,ylsuoivbO tcilfnoc yam rucco gnoma e hstnoi tealtish wgnisu s i,h rtneoimfmiotcnedi neve nehwlennahc .del b easnn ioe0la oT evloser eseht ,stcilfnoc a dellortnoc aholA ,ygetarts desab no tseviR naiseyaB-oduesp tsacdaorb ,]4[ si .desu Accord:ing ot eht ,rettaleht retsam setamitse eht rebmun fo gnimocni snoitats dna senut lennahc0 gniludehcs.etar .3 ehT ASI-R-CVA muideM sseccA lortno ClocotorP )PCA4h( ehT locotorp detaler ot eht ASI-R-CVA ygetarts sedivorp adohtem , fggonniihnsiialtbnai tads mneganitanimr eetht AS.In-oRi-tCcVeAnnoc PCAM h:st gseceueoneosgirrathhhsttpid )1 kniL establishm.ent ,erofeB yna noitamrofni yam eb ,degnahcxe eht locotorp tsum tsrifnepo e hntoit chegnunoorcht na egnahcxe f onoi t.csetnenkocCa psihTegnahcxe si ,etelpmoc dna eht noitcennoC etats ,deretne ecno na egdelwonkcA noitc etnenkocCap sah neeb tnes morf eht rets anMoitats ot eht .evalSynA ASI-R-CVA-n oknn itlnemhsil bsatteskecap deviecer erofeb siht egnahcsi ,detelpmoc era.dedracsid 2) Information exchange litnU a knil noitanimret noitca sruocco ew evah a ralugernoitamrofni egnahcx egnoma oida rsno igtnaitdsrocca ot eht ASI-RCVA .ygetarts )3 kniLnoitanimret ehT locotorp yam etanimret eht knil ta yna .emit sihT yllausunac eb enod ta eht tseuqer fo a namuh resu ro nehw .eht retsam stceteda rebmun fo ytpme stols retaerg naht a dexi f,dlohserht rof a nevig.noitats MACP is specified by a number of packet formats and by a protocol machine. We now present an overview of the MACP ,noitamotua dewollof yb a noitatneserper fo eht etats noitisnart .elbat sA eht retsam dna eht evals snoitats mrofrep tnereffid sksat yeht deenowt tnereffid PCAM.noitamotua erehT era eerht sessalc fo PCAM stekcap gnidrocca ot ehtsuoiverp denoitnem :sesahp 1) Link establishment packets used to establish a link (e.g., evalS/ret snaoMitcennoc ,tseuqer retsaM egdelwon.k)cnaoitcennoc )2 noitamrofnI egnahcxe ,stekcap taht etaluspacne eht reppu reyal .noitamrofni ehT retsam noitats ton ylno sesu siht dnik fo stekcap ot timsnart eht reppu reyal ,atad tub osla ot tsacdaorb eht CAM lortnoc 54 information (e.g., retsaM ,noitazinorhcnys evalS .)noitamrofni nA noitp edcex tesaitnes eyrbper neohittar ee nt”eagGrn“ i,ttaedkpcuaptnes from the Slave, that comprises only AVC-R-ISA supervisory information. )3 kniL noitanimret stekcap desu ot etanimret a knil ,.g.e( evalS/r entosiatMcennocsi d,tseuqer retsaM egdelwo,nnkociatcennocsid retsaM detcejer ,noitcennoc retsaM.)nwodtuhs ehT locotorp enihcam si denifed yb ,stneve etats snoitisnart dna.snoitca stnev Eedulc ntipiecer fo lanr estdxneammoc hcus sa hctiwS ffO/nOdna fo eht D i s c o n n e c t i o n , e x p i r a t i o n noitazinorhcnyS/noitcennocsiD/noitcennoC ,sremit dna tpiecer fo.stekcap snoitcA edulcni eht gnitrats dna gnitratser fo eht ,sremit ehtsnoissimsnart fo stekcap dna setadpu fo eval snoitat sytpme tol ssretnuoc ni redroot edivorp na citamotua knil.noitanimret mrddA Address ytilibaborP-XT tiB map ktgnel Access rights noitamrofnI FCS lennahC 0 - (Bit-map) dleh r \ Protocol T Flag kcabdeeF S mrddA A d d r e s s -L reifitnedI I ytilibaborP-XT pam-tiB ttgnel Acc@s noitamrofnI FCS Channel 0 (Bit-map) rights dleif \ / \ Protocol S Flag kcabdeeF Y‘-’marF P e AddraG - reifitnedI 1 / L ytilibaborP-XT tiB I pam lengtt Access rights noitamrofnI FCS lennahC )pam-tiB( dleif 4 k 0 4 \ Protocol Flag kcabdeeF =LdA C h a n n e l + reifitnedI 4 I / ytilibaborP-XT tiB pam lengtt Access rights noitamrofnI FCS lennahC - (Bit-map) field k 0 / S Flag Protocol kcabdeeF epyt-emarF sserddA L FCS reifitnedI / . zrlF 1 S (Master SEMARF-)noitatS : )A T Connection Acknowledge; )B T Connection Request; )C ;noitazinorhcnyS )D T Connection Rejected; )E T noitcennocsiD ;tseuqeR )F T noitcennocsiD ;egdelwoncA G ) nwodtuhS (forced noitcennocsid of all the T station). \ Protocol S T Flag reifitnedI serddA sserddA / 4 Flag Protocol Frame type wridA Channel FCS reifitnedI f I \ Protocol Flag reifitnedI \ Protocol S Flag Frame ”- epyt serddA Channel reifitnedI I . giF . 2 S (Slave Station)-FRAMES : A) noitcennoC ;tseuqeR )B Disconnection Request; C) Information; D) Generation Rate Updating. The etelpmoc set fo PCAM semarf is detciped in .sgiF 1 and 2 erehw eht retsaM dna eval Ssnoitats era detacidni sa S dna .,yTlevitcepser .4 etatS noitisnarTselbaT ehT etelpmoc etats noitisnart selbat rof eht retsaM dna ehtsevalS .wollof setatS era detacidni ni eht ,swor dna stneve era daer ni eht columns. State transitions and actions are represented in the form .etats-wen/noitca snoitcA desuac yb eht emas tneve era detneserper sa 1noitca .Nnoitca&....&2noitca& evitanretlA seciohc era( rapresented as action1 noitcaI .2 t 1nrteonveevle 56 retsaM etatS noitisnarTelbaT I State I 1 2 3 stnevE I EVITCA-N ODNETCENNOCSIDDETCENNOC -I-------------------~~~~,~~~~~~~,~~~~~~~,,,,~,*,,~~,~,~,,,~,,,~,~~~~~~~~,,,,,,,,, +ASI I 2/+tS 2 3 -ASI I 1 (st-&sshd)/l l/)dhss&-ts( ST0 I l/pir 2 *)213(/))rdmslcnss(&+cs( ’IFN I 1 2/cnss 3 RCSR I 1 3/ckos **3/))cjrslckos(&++ts( RSDR I 1 2 ***)213(/)dkos&++ts( RINF I 1 3/)cnss&-cs&++ts( 2 URGR I 1 3/)cnss&-cs&++ts( 2 RMCR I 1 3/+WS 2 RMDR I 1 3/+WS 2 CKOR I 1 3/+WS 2 DKOR I 1 3/+WS 2 RRJC I 1 3/+WS 2 RSHD I 1 3/+WS 2 RSNC I 1 3/+WS 2 I )*( czw n ieht lamron transmission, dneeeis hha ectcavaaelrS smdr mumixam dewolla fo ytpme .tols ehT noitisnart ot etats 2 sekat ecalpylno esacni na si dettimsnart dna ereht si ylno eno noitats.detcennoc smdr )**( ckos ni a la m,rnoonitisna rctjrs ni eht esac eht numixam rebmunfo evals noitats dewolla nihtiw eht llec si.dehcaer )***( seoG o tetats 2 ylno fi si tnes dna ereht si ylno enonoitats sokd .detcennoc ng Ine i b ew yi ghoelrentlwfchilestn oieaffrdeosbm ueohitverp denoitnem ,setats stneve dna.snoitca States -EVITCA-NON ehT retsaM noitats tonnac od ytivitcano eht;krowten -DETCENNOCSID ehT retsaM noitats si evitca tub oneno evalS si;detcennoc -DETCENNOC tA tsael eno evalS si detcennoc oteht Master. stnevE -+ASI detaleR ot ASI“ hctiws ”no resu dnammoc ;]5[ - -ASI detaleR ot ASI“ hctiws ’ffo resu;dnammoc - 0TS noitazinorhcnyS;tuoemit 57 TFN- New emarF dettimsnarT a( wen emarf si detresni nieht noissimsnart ;)eueuq -RCSR Received evalS noitcennoC ;tseuqeR -RDSR Received evalS noitcennocsiD;tseuqeR -FNIR Received noitamr orfonfI;evalS -URGR Received noitareneG etaR;gnitadpU -RCMR Received retsaM noitc;e;ntnsoeCuqeR -RDMR Received retsaM noitcennocsiD;tseuqeR -CKOR Received egdelwonkcA ;noitcennoC -DKOR Received egdelwonkcA ;noitcennocsiD -CJRR Received detcejeR;noitcennoC -DHSR Received ;nwodtuhS -CNSR Received Synchronization. snoitcA - rcms tneS retsaM noitcennoC;tseuqeR - rdms tneS retsaM noitcennocsiD;tseuqeR -ckos tneS egdelwonkcA;noitcennoC - sokd tneS egdelwonkcA;noitcennocsiD - srjc tneS detcejeR;noitcennoC - dhss tneS;nwodtuhS - ssnc tneS ;noitazinorhcnyS -+ts noitazinorhcny Sremit;trats - st++ noitazinorhcnyS remit;tratser - -ts noitazin orrehmcintyS;pots - sc+ retnuoC tols;tnemercni - -cs retnuoC tols teser for rettimsnart;evalS Not elbissop remit( si .)!deppots - “P 85 evalS etatS noitisnarTelbaT IetatS I 1 2 3 4 5 6 stnevE .SNA RSTD-TI ANWN ONCCI-TI ACWS I.DTCA-N ON +ASI I 2 2 3 4 5 6 -ASI I 1 1 l/-tc dt-/6 6 1 CID I 1 2 2/-tc 4/+td 5 6 0TC *A 4/pn 5/pn bpn 1 l/pir 2/pn DTO 1 l/pir 2/pn 3lpn 5/-td np/5 6/pn 0TN 2/-tn 2/-tn 2/-tn l/-tn 1 l/pir 2/pn TFN I 1 #3/)+tn&+tc( 3 **4 5 6 XRG 4*** 5 6 1 l/pir 2/pn 3/pn RSCR I 1 2 3 4 5 6 RSDR I 1 2 3 4 5 6 FNIR I 1 2 3 4 5 6 URGR I 1 2 3 4 5 6 RMCR I 1 3/+tc 3/rcss B 5/rdss 6/rdss RMDR I 1 2 2/-tc 2/-td 2 1 CKOR I 1 2 4/-tc B 5/rdss 6/rdss DKOR I 1 2 3 B 2 1 RRJC I 1 2 2/-tc B 5frdss 6/rdss RSHD I 1 2 2/-tc 2/-td 2 1 RSNC I 1 2 3/rcss&-tc ****B 5/rdss 6/rdss I erehw A )2/-tc(l)3/)rcss&++tc(( B 4/)anlfnislurgs( )#( ehT remit gnilangis eht on ytivitca yb eht retsaM noitats sidetratser nopu noitpecer fo a dilav tekcap ni setats ,3 ,4 5 e.6 )*( ehT tsrif tuoemit fo eht noitcennoc remit sdleiy ++tc( 3/)rccs& saerehw eht dnoces .2/-tc )**( no i ds nsga ine temihrimsuToan efrasu friqt tngnene sihelwhbtane langis morf eht retsam si.gniviecer )* * ne*doh(eiTt t ascyviabitca ,urgs nehw eghnt illabnagn iemsorfeht retsam si.gniviecer ( )**** ehT eciohc si edam gnidrocca ot ytpme(/tfn/xrg )eueuq .ylevitcepser ,seta tsStneve dna snoi tdceataler ot eva lsSnoitats er adebircsedni eht.gniwollof States - EVITCA-NON tn eooehnivTntaaalctSs yti nvooidtca ;krow teehnt - DETCENNOCSID n o eei ehvtsv TaaiitlttuSscb ati siton ;detcennoc - NNOC-TIAW ehT evalS noitats si gnitiaw rofnoitcennoc dna ot eviecer sti lacol idlentifier; - DETCENNOC deeehvt Ta co;lset rSineenhtotscaM - CSID-TIAW ehT evalS si gnitiaw rof ;noitcennocsideht lanif etats n oegpgnudievliweocnekrcA noitcennocsiD si ;DETCENNOCSID - NOITISNART ehT evalS s ig;nniotiit acrweonfnocsid eht lanif etats nopu gnivieegcdeerlwonkcA n.oEiVtI cTseCinAn-oNcOsNiD stnevE -+ASI detaleR ot “ ASI ;dnamm orce s”u nhoctiws - -ASI detaleR ot “ ASI hctiw s’ffo re;sdunammoc -CID detaleR ot “ ASI ;dnamm orce s”utcennocsid - 0TC Connection ;tuoemit -OTD ;tuoem intoitcennocsiD YIFN- weN e mdaertFtimsnar Ta( wen emarf si detresni nieht ;n)oeiusesuiqmsnart -XRG noitareneG etaR noitaira Vgnideecx;edlohserht - RSCR devieceR evalS noitcennoC;tseuqeR -RDSR devieceR evalS noitcennocsiD;tseuqeR -FNIR de vnioeicteaRmrofn Irof;evalS -URGR devieceR noitareneG etaR;nitadpU - RCMR devieceR retsaM noitcennoC;tseuqeR - RDMR devieceR retsaM noitcennocsiD;tseuqeR -CKOR devieceR egdelwonkcA;noitcennoC - DKOR devieceR egdelwonkcA;noitcennocsiD -CJRR devieceR detcejeR;noitcennoC - RSHD devieceR;nwodtuhS - RSNC .noitazinorhcn ydSevieceR snoitcA - sscr tneS evalS noitcennoC;tseuqeR - ssdr tneS evalS noitcennocsiD;tseuqeR -fnis tne;SnoitamrofnI (- urgs ;gnita dep tUnaoRitare ntenGeS -‘ et+ noitcennoC remit;trats a- ct++ noitcennoC remit;tratser ‘- ct- noi trceemnin;topCots - dt+ noitcennocsi Dremit;trats - dt- noit creenmniot;cpsoitDs - an onNoi sn soeiiumtescunaqart (si;)!ytpme toN elbisso premit( si.)!deppots - nP .5snoisulcnoC eW evah detneserp ni emos liated eht etats noitisnart selbat foeht ASI- R A-.CSClAIVoM-AcRo-t C osVyri Alpglnaiuntncua rsaCAM ssecca locotorp no a krowten gnirevoc htron tsew trap fo .ylatIehT krowten si eht deb-tset rof eht noitcennoc fo lacol .skrowtenevalS snoit attcsa sa laco la esrrae teuloirhw eh t r,entosiad tmelanltoesiwtisop no a 000,5 tf ,pot seganam eht xelpud-flah ,lennahc no eht 07 mc,dnab gnidr ooctca e hA tS.Im -hARtS -iIsCriVoAgla no eht ri aecn ifslahraey dna siht locotorp enihcam stneserper eht tsal noisrev fo na etaruccadna yrassecen gninut.troffe secnerefeR ]l[ .F ,ilovaD .A ,onadroiG .S ,erotappaZ erutcetihcrA“ dnalocotorp ngised rof a erutcurtsarfni-ot-rac tekcap oidar ,”krowten Proc. ,EEEI MOCEBOLG ,09‘ .S ,ogeiD ?AC .ceD 1990, pp. 1579-1585. ]2[ .M ,idraciA .G ,onilasaC .F ,ilovaD tnednepednI“ snoitatsmhtirogla rof eht snoitazimixam fo pets-eno tuphguorht ni a sseccaitlu,m”lennahc EEEI .snarT ,.mmoC .lov ,53-MOC .pp ,008-597 .guA.7891 ]3[ .M ,idraciA .F ,ilovaD .A ,onadroiG .S ,erotappaZ nA“evitatpada elpitlum ssecca locotorp rof a tekcap oidar krowten fo elibom dnadexif ,”snoitats Proc. 2nd SUEHTEMORP ,,m pl,oonhheskdkcerow.otStWScO 1989, pp. 378-386. ]4[ R.L. Rivest, krowteN“ lortnoc yb naiseyaB ,”tsacdaorbEEEI .snarT .mrofn I,yroehT .lov ,33-TI .pp ,823-323 yaM.7891 ]5[ .F ,ilovaD ,A ,onadroiG .A ,illivomI .C ,eliboN .G ,aviredeP.S Zappatore, CVA“ R :ASI a CAM reyal rof ,”ten/SON Proc. ht9LRRA retupmoC gnikrowteN ,ecnerefnoC ,nodnoL ,oiratnO .tpeS ,0991 .pp .61 20 . 61