BO CO THC TPKnh gi: TRUNG TM DCH V VIN THNG KVI LNH O I GSM T QUN L THIT B H THNG 2 KHOA IN T VIN THNG -HC VIN K THUT QUN S Tn ti l: Sinh ngy: Mai Anh Dng 11/03/1988

A. GII THIU CHUNG V N V THC TP Cng ty dch v vin thng l mt cng ty trc thuc tp on bu chnh vin thng Vit Nam (VNPT) hot ng trong cc lnh vc thng tin di ng, cung cp cc dch v GSM , nhn tin ( paging) , in thoi th ( cardphone) vi tn thng mi l VINAPHONE. Cng ty c thnh lp ngy 26 thng 6 nm 1996. Tnh n cui nm 2008, VINAPHONE l mng di ng ln th 3 Vit Nam chim 20% th trng thng tin di ng . Vi Slogan Lun bn bn d bn ni u , Khng ngng vn xa VINAPHONE ang tin tng bc trong vic tr thnh mng vin thng ln nht Vit Nam. B. TI THC TP

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Tm hiu tng quan v h thng tng i di

ng MSC

Ericsson (AXE 810), cu trc chc nng tng khi ca MSC

Cu trc ca tng i AXE 810 Ngy nay AXE l phn chuyn mch pht trin nht trn th gii. C 14500 nt AXE ang phc v cho hn 141 nc. Phin bn mi nht da trn 2

nn tng chuyn mch AXE, AXE 810 duy tr v tr s mt ca Ericsson trong nn cng nghip thng tin lin lc ph hp vi v s ng dng bao gm c cc ng dng mng 3G. Sau y cc c im kin trc h thng s th hin s u vit .

Cc dng modul ng dng Thit k h thng AXE s dng cng ngh tin tin nht sn c c tch hp vi cng ngh vin thng c th do Ericsson pht trin nhm p ng nhng yu cu thay i nhanh chng ca khch hng trn ton th gii. Gn y, s pht trin hng ti i hi kin trc h thng phi tng tnh m hn na. Kin trc h thng AXE c tnh modun v tin hnh s dng khi nim modun ng dng Ericsson (AM). Khi nim modun mang ti kin trc m cho s pht trin h thng hin thi v tng lai, rt ngn thi gian thng mi ha v dch chuyn d dng ti cc kin trc mng pht trin. Nh tnh modun vic iu khin s d dng, gim gi thnh khai thc v mm do. Do p ng nhng thay i v thoi, s liu, video, truyn thng a phng tin v Internet trn th gii. Ngha l c th d dng kt hp cht ch phn mm, phn cng v cng ngh chun cng nghip, cung cp cho AXE nn tng c kh nng p ng v tn, c th c p dng vi hu nh bt k ng dng no ca th trng cho c hm nay v mai sau. 3

Kin trc phn mm AXE ging nh mt c s d liu phn b, trong mi modun hoc thc th hot ng vi s liu ca chnh n. Cc modun phn mm chnh c phn thnh cc n v phn mm khu vc, trung tm (CP) v b x l h tr hoc b sung tng ng. Giao din vn hnh v bo dng pht trin trn nn qun l m c c s ng dng a dng. ng dng ng ch l h thng vo ra (I/O) AXE. Thm vo a ra giao din m gi l cc im tham kho tch hp, IRP. Mc ch ca cc IRP l t c s tng kt gia cc thnh phn mng qun l v cc h thng qun l a cng ngh trn nh cung cp. Mt s lu tm v tnh m nh sau: Kh nng chy cng phm mm trn phn cng c b x l khc nhau. Kh nng chy phn mm ca bn th ba khng cn sa i. Kh nng chy cc chng trnh vit bi cc ngn ng chun a dng. Kh nng s dng nhiu giao din phn cng chun. Kh nng p ng cc chun v kin trc mng ca nhiu nh cung cp. Tnh modun ca AXE c th c m t nh sau: a chc nng: H thng AXE c dng cho tt c cc ng dng c phm vi t cc tng i ni ht nh cho ti cc trung tm chuyn mch di ng v quc t rng ln. H tr truyn thng ca doanh nghip, ISDN, cc thu bao di ng v cc mng thng minh (IN) trong cc khu vc th , ngoi , thnh ph v nng thn. Modun ng dng: Khi nim modun ng dng (AM) Ericsson l c s ca AXE, theo trnh t d dng kt hp cc ng dng khc nhau trong cng mt node. AM cho php s dng li cc phn mm hin c, cho php d dng tng thch chc nng gia cc dng sn phm AXE khc nhau. Modun chc nng: AXE c nh ngha cc mc chc nng. Cc chc nng c th c thm vo, xa b hay chnh sa m khng lm ri lon cc phn khc ca h thng. 4

Modun phn mm: c lp chng trnh c lp vi cc phn khc. Cc modun tng tc bng cc phng tin bo hiu phn mm c nh ngha nghim ngt. Mt li trong mt modun s khng l nguyn nhn lm mo s liu trong cc modun khc, do cung cp bo mt phn mm ng n. Modun phn cng: Thit b c chun ha, kt qu l d dng iu khin, sn xut, kim tra, ci t v bo dng. p dng quan im khi kin trc, nh ngha t cc thnh phn nh nht cho ti cc b cu hnh node y . Modun cng ngh: AXE gii thiu cc cng ngh mi trn nn chun. Nhiu cng ngh c th c gii thiu cho mt thnh phn m khng nh hng ti cc phn khc ca h thng AXE

Cu trc chc nng tng khi ca MSC Ericson AXE 810

1.Khi nim modun ng dng Ericsson pht trin khi nim modun ng dng (AM) nhm gim phc tp ca phn mm ng dng do vic gii thiu cc dch v truyn thng mi v tnh m ln kin trc h thng AXE. AM n gin l mt b cc 5

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nguyn l r rng cho vic xy dng v thi hnh cc ng dng phn mm. Kt qu l mt b modun phn mm c lp, c th pht trin, thc thi, kim tra v ci t m khng nh hng ti cc modun khc. AM lin lc vi nhau hoc vi XSS (Existing Source System) thng qua cc dch cc dch v truyn thng trong RMP (Resource Module Platform). Vic truyn thng ny c iu khin bi cc giao thc v giao din nh ngha cht ch. Cc modun ng dng c th c cu hnh li hoc nng cp m khng nh hng ti cc ng dng lin quan khc. Mm do n ni m cc modun h thng c th c sp xp ph hp vi s a dng ca cc ng dng. Ni mt cch khc, mi h thng AXE n gin l s kt hp ca cc khi chc nng lin kt c yu cu cho ng dng ring bit. AM n gin ha x l kt hp cc ng dng khc nhau nhm ph hp vi cc yu cu ca cc node AXE ring bit, v d nh phn mm c th c dng li. Dch v c th c chuyn t mt dng sn phm AXE ti ci khc vi gi ti thiu. N lm gim vic s hu gi ngi dng, bo v s u t khc hng hin c trong AXE v cho php a ra cc dch v mi nhanh hn. Trong h thng ng dng ban u, XSS bao gm cc phn chc nng chuyn mch AXE. Mt khc RMP thc hin vai tr sng cn trong vic chuyn hng m ln kin trc h thng AXE. 2. Nn modun ngun

Nn modun ngun AXE (RMP) RMP cung cp dch v kt ni cho chuyn mch nhm AXE, kt hp cc ngun chung, h tr truyn thng gia cc modun ng dng v h tr cc 6

dch v chung s dng bi XSS (h thng ngun hin c) v cc modun ng dng, v d nh dch v tnh cc. RMP cng h tr truyn thng gia cc AM. N cng c th cung cp kt ni ti cc chuyn mch khc. V d, RMP cung cp mt giao din gia chuyn mch ATM v nn chuyn mch gi khu vc, do Ericsson pht trin nhm nng cao cc ng dng truyn thng s liu thng thng nh l s liu qua GSM cng nh Internet. Nn modun ngun (RMP) bao gm mt s cc modun ngun (RM) l h thng modun c s dng trong tt c cc dng sn phm AXE, cho c di ng v c nh. c bit cc RM h tr kin trc modun ng dng. Giao din dch v nn ng dng (APSI) l mt h thng giao din cung cp cc dch v ch khch (client-server) cho cc ng dng (khch hng). Cc dch v APSI cng thi hnh trong RMP hoc XSS. Nhng dch v ny cn thit cho vic phi hp ngun chung m cc AM khc nhau c php s dng. Mt v d v mt ngun chung l chuyn mch nhm (Group Switch). Cc dch v APSI bao gm: Kt ni cc chc nng bao gm kt ni gia hai im v gia nhiu thu bao hoc thng bo dch v u cui. Bo hiu knh chung theo tiu chun quc t nh l ITU-T v ANSI, cc tiu chun quc gia nh Trung Quc v Nht Bn. H tr truyn thng ni b cho cc AM ch giao tip thng qua RMP, tc l chng khng th giao tip trc tip vi nhau. RMP c mt b chung cc dch v giao tip AM dnh cho vic iu khin lu lng v cho hot ng bo tr. Phi hp cc ngun l chung cho nhiu AM. Nh chc nng c php chia s gia cc AM thng s cn n cc ngun chung. V d nh thng tin tnh cc lin kt vi mt cuc gi ring bit.

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3. Nn tng mng li

Nn tng mng li IPN Da trn Ethernet 100 Mbit, mang ti giao din dung lng cao cho AXE. IPN c mt s ng dng nh sau: Truyn thng CP-AP, S dng bng thng ci tin lm gim thi gian sao lu h thng v thi gian np li. Truyn thng gia AXE/CP v cc nn khc (nh l TSP hoc AXD301) nhm mc ch gim ti dung lng hoc to ra mt nt lai. V mt chc nng, IPN thay th 10 Mbit STOC (bo hiu giao tip u cui m) c s dng trc nh mt u cui Ethernet AXE ni b B giao thc TCP/IP

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c cung cp trn nn Ethernet v bao hm cng chc nng cho vic trao i cc giao thc AXE ni b. Giao thc vn chuyn File (FTP) dng cho vic truyn d liu n AP. Hin nay cc giao thc truyn thng mc ng dng ring bit qua IPN c sn nh sau: Giao thc bn tin cho cc b x l b sung MTAP vn chuyn cc bn tin c di thay i t mt ng dng CP ti mt b lu tr trong mi trng AP m cc bn tin c t chc trong cc b lu tr bn tin. S dng MTAP cung cp mt giao din trong CP cho h thng file trong AP. Giao din qun l file FMI l giao din h thng file truyn thng trong IOG v c sn trong AP cung cp giao din h thng file tch hp ngc cho cc ng dng trong CP cha tng thch vi giao din MTAP. Giao thc vn chuyn cng vic JTP l giao thc chung gia CP v AP, s dng cho cc ng dng trong mt b x l m n mun bt u nhim v trong b x l khc. Giao thc thit b ch s ADP c s dng truyn thng tin ch s (lnh v bn in) t khi thit b trong CP ti ng dng Telnet trong AP. Giao thc iu khin bn ghi giao dch TRH h tr nhu cu giao tip ca giao din iu khin AXE AXD301 c s dng trong gii php ENGINE. Cc giao thc truyn thng ng dng khc cng s c thc hin sn h tr trnh t chc nng phn phi. Vic gii thiu cc dch v truyn thng AXE mi lm cho AXE c th kt hp vi cc chc nng tm thy trong cc nn khc. Kh nng ny h tr nh bc thang, cc bc, hot ng di chuyn cng nh kh nng dng li. Cc dch v truyn thng chy trn chun Ethernet. Mt s cc dch v b sung chc nng trn TCP/IP, qua Ericsson c th la chn v xp t cc chun thng mi khc nhau theo trnh t ph hp vi mc cn thit ca ng dng.

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4.H thng iu khin APZ Nhn t quan trng ng sau s mm do ca AXE l kin trc h thng iu khin APZ, APZ c kin trc hai mc gm c iu khin trung tm v iu khin phn b. Tin ti m bo tin cy cao v iu khin cuc gi hiu qu. APZ, trng tm ca AXE, lin tc c pht trin trong nhiu nm qua nhm cung cp h thng iu khin mnh m v mm do cho cc ng dng truyn thng phm vi rng. N lc pht trin lun u tin kh nng tch hp mc cao vi cc th h trc y, qua thc hin nng cp an ton vi ci t AXE hin c. APZ bao gm vn hnh tin cy v d dng iu khin. V cng nh AXE, APZ cng biu hin mt kin trc modun nh m t di y:

Cu trc APZ u im ch yu ca h thng APZ gm c: H thng a ng dng c xc minh. iu khin c lp cc b x l khc nhau. Nn tng phn cng a ra mt lot cc cu hnh hiu qu. 10

tin cy phn cng cao. D tha trong tt c cc n v gii hn.

Ci thin chc nng phc hi da trn cc li v phn cng v phn mm. Ci thin chc nng nng cp phn mm trc tuyn v t xa. c trng kin trc ch yu ca h thng x l APZ bao gm: Cu trc x l phn tng cho php mt s ty cc b x l khu vc c php kt ni ti b x l trung tm hiu qu. B sung thit b tnh ton chun cho b x l b sung. S dng gn vi b x l thi gian thc, v d nh chun s liu tnh cc. Modun chc nng bao gm cc chng trnh ngn ng mc cao. B x l trung tm CP c nhn i, a ra dung sai li phn cng cao. Khi xy ra li, iu khin cho php hon i ti cc side khc m khng nh hng ti kh nng iu khin lu lng hoc mc ti thiu. B x l trung tm bao gm 3 b lu tr logic: B lu tr chng trnh (PS) m t vng chng trnh ca cc khi chc nng. B lu tr d liu (DS) m t vng d liu ca cc khi chc nng. B lu tr tham kho (RS) bao gm chng trnh v thng tin d liu a ch cho mi khi chc nng. H thng vn hnh s dng hai bng ch ra cc a ch tuyt i ca chng trnh v vng d liu ca khi thu. D , khng cn ngi thit k v k thut vin bo tr xem xt nh v vt l ca phn mm. Cu trc ny c kt hp vi k thut nh a ch ring bit, l c s trong cung cp mc modun phn mm t nn tng AXE. Cc chng trnh v d liu c cp pht t ng cc a ch tuyt i sut qu trnh x l ti ca chng trong b nh. B x l khu vc (RP) s dng cho x l nh tuyn lp v x l cc nhim v tp trung nh l hon thnh cc lp giao thc thp hn. Cc b x l khu vc mi nht c nn tng x l m, n c kh nng chy phn mm 11

ng dng s dng cc ngn ng chng trnh chun nh C hay C++. Vic s dng cc ngn ng mc cao cng a ra nhng c hi khc, nh l thi gian thc nhm tng li ch th trng thng qua kt hp cc modun phn mm chun sn c. B x l b sung (AP)

Ly nhim v x l d liu dung lng yu cu t b x l trung tm v n nh chng thay v b x l dnh ring, qua gii phng b x l trung tm cho nhim v iu khin lu lng. B x l b sung thay th hoc b sung b x l h tr (SP) s dng trong h thng IOG. B x l b sung ph hp vi yu cu vin thng da trn phn cng sn c c thng mi ha cng nh cc h thng vn hnh. B x l b sung thc hin: Tng hiu qu mng thng qua kt hp s dng giao thc giao din m v ng truyn Ethernet cho truyn dn tin cy v nhanh chng d liu tnh cc u ra n trung tm thanh ton. Tng nng lc x l, cung cp kh nng cn thit iu khin yu cu ngy cng nhiu ca cc b m thng k khi kch c ca node tng ln. 12

Gim ti b x l trung tm bng vic nh dng d liu tnh cc bn ngoi ti b x l trung tm. iu ny lm tng kh nng iu khin cuc gi v cho php nh khai thc tng thm nhng thu bao cho mng. Ci thin chc nng vo ra I/O v truy nhp ti AXE, c trng bi tc truyn thng u cui nhanh, cho php sao lu file v iu khin cnh bo. Kt qu l gi thnh vn hnh v bo tr thp hn.

H thng m bao gm kh nng h tr cng ngh mi cho cc dch v vn hnh v bo dng. Kin trc chu li (Fault-tolerant) h tr kh nng tro i nng nhm m bo mi trng x l ng dng khe mnh. Phn cng gm c c kh nng m rng v phn d tha, cho php hiu qu v chi ph v vn hnh tin cy. Nhng v d v thi hnh cc ng dng trn b x l b sung (AP): PPhn h nh dng v u ra (FOS) h tr nh dng bn ghi d liu tnh cc nhm tng kh nng hu x l, khun dng hiu qu cho chuyn vng rng v cc dch v ci tin vi mng tng lai. B x l 13

trung tm thu thp d liu tnh cc v gi n ti APG. d liu c ghi li trong mt vng lu tr file an ton v sau thng qua x l nh dng cho bin i n khun dng u ra. D liu nh dng sau c php gi n h thng thanh ton bn ngoi. Phn h o lng lu lng v thng k (STS) cung cp b thu thp, lu tr v thc hin d liu thng k. STS c nhng nhm b m vi cc chc nng h tr (nhn thc, s ni ht linh ng, lu lng trn tuyn, cc kch bn bin i kch c, nh s trang nhiu tng i v cc hot ng thu bao). Mt u im ca STS l gim ti b x l trung tm. B x l trung tm thu thp d liu b m c thng qua bi nh dng d liu th a n phn h STS lu tr trong APG - y n c lu tr, nh dng v a ra nhng thng tin thng k yu cu. 5. H tr chuyn mch gi v truyn thng d liu Nn tng AXE ci tin h tr s dng cc ng dng chuyn mch gi v c truyn thng d liu. V d nh PCI da trn nn b x l khu vc (RPP) v bng chuyn mch gi Ethernet, EPSB. RPP nhm ti h tr cc ng dng vin thng lin quan ti truyn thng d liu. RPP a ra dy giao din phn cng m, dy ng dng phn mm cng vi mi trng pht trin ton vn. ng dng u tin s dng RPP/EPSB l PCU (Packet Control Unit: n v iu khin gi) da trn b iu khin trm gc BSC. Cch dng ny c lin kt h tr GPRS trong mng di ng GSM. RPP c t nh mt b x l khu vc gc trong kin trc AXE. RPP m rng chc nng RP truyn thng bng vic h tr mt s giao thc v ng truyn vt l. ng truyn Ethernet nhn i cng h tr cho cc ng dng truyn thng s liu phn phi hot ng qua mt s RPP. Sn phm bn th ba cung cp giao thc h tr modem, fax, V.110, m ha thoi, hy ting di, ATM, IP (TCP/IP) v HDLC. Bng chuyn mch gi Ethernet (EPSB/EPS) h tr nhng ng dng c phn phi qua mt s RPP v do i hi h tr lm vic lin kt. 14

My ch truy nhp Internet, chc nng da trn RPG, cho php tp trung lu lng d liu sm im truy nhp. Thu bao c php kt ni thng qua ISDN (64 kbps) hoc thng qua modem. My ch truy nhp c kh nng cung cp nhng im truy nhp khng tp trung, tch hp tr thnh cc tng i mng cng cng cho nhng nh cung cp dch v khc nhau. T nhiu nh cung cp dch v Internet (ISP) c th chia s my ch truy nhp, trong mng chuyn mch cng cng n c th hot ng nh mt im chung cho mi ISP. 6.Kin trc phn cng

Kin trc phn cng Chuyn mch nhm (GS) thng c xem nh hub vng m h thng xy dng. Chuyn mch nhm thc hin chc nng nh b la chn, kt ni v ngt kt ni ng tn hiu hoc ng thoi i qua chuyn mch nhm. GS cng bao gm mt mch chuyn mch ph tch hp. Ngoi ra GS gim st nhng ng lin kt s kt ni thng qua chuyn mch. Qua bo tr tn s to nhp chnh xc v n nh cho mc ch ng b mng. Bus x l khu vc (RPB) trc tin c s dng cho truyn thng gia nhng b x l trung tm v b x l khu vc. RPB cho php cc RP ng dng trn bng hoc bng n c tr trong cng mt bng nh thit b ma chng iu khin. Do ti thiu ha phn cng v cable kt ni gia cc 15

thit b phn cng. RPB c dung lng 6 Mbit/s mi nhnh. Nhng kt ni nhn i cho cc RP c thc hin mt sau, do d dng sa cha nhiu t do, ci t v m rng cho tng lai. Bus modun m rng (EMB). Phn cng chuyn mch c th c sp xp thnh cc nhm gi l cc modun m rng (EM) bao gm cc n v ghp c kt ni ti b x l khu vc (RP) thng qua bus EM. Bus EM gia RP v cc EM ch c mt sau, do cc cp bus EM l cn thit. a ch ca mi EM c m ha trong phn mt sau, do loi tr nhu cu gn a ch EM. Nn tng mng li, IPN c tin c cho b x l APZ 212 30 v APZ 212 33 cng nh cho APG40. Ban u IPN s dng ci thin sao lu h thng v hiu sut ti li. u im th hai ca IPN l kh nng trnh din trong kt ni vi nhng h thng kin trc rng m AXE c kt hp vi cc thnh phn khc nh l TSP hoc AXD 301 cho vic to ra h thng lai ghp. IPN cung cp knh truyn thng Ethernet 100 Mbit cung cp tc bn tin ngn cao hn, tng sao lu v ti li thng sut. ng lin kt s (DL) l giao din gia chuyn mch nhm v thit b cu hnh. Mt s phin bn DL hin c vi dung dung lng khc nhau m DL34 l giao din mi, ti u ha truyn thng gia chuyn mch nhm mi (GS890) v cc thit b tc cao khc nhau. Dung lng bin i theo cc bc ca 128 khe thi gian, bao ph mt phm vi t 128 n 2096 khe thi gian. Dung lng cc i gm c nhng ph ti khc nh l bo hiu l 2688 knh 64 kb/s. B x l trung tm (CP) c nhn i, do cung cp mc cao v sai li phn cng cng nh dung lng x l cao. bt k thi im no, hai side x l vn hnh, ch c mt side x l iu khin phn cng ng dng. Khi xy ra li trong vng hot ng, iu khin c php trao i vi side khc (nu li c xem l nghim trng) m khng nh hng ti iu khin lu lng hay ch mc ti thiu. B x l khu vc (RP/RPG/RPP/RPI) c dng cho x l nh tuyn lp, iu khin phn cng ng dng v cc nhim v x l tp trung nh l iu 16

khin giao thc. Kin trc cho php m rng hon ton p ng nhu cu s lng v loi x l khu vc. Nhm x l b sung (APG) l nn tng phn cng cho b x l b sung. APG da trn phn cng c kh nng thng mi ha v h thng vn hnh, hnh thnh nn tng mc cao cho gn vi thi gian thc, i hi v dung lng v qun l nhim v x l. APG thay th nhm x l h tr (SPG). B chuyn m (TRA) s dng kt hp vi cc h thng GSM cho x l thoi. Vi cng nn tng phn cng s cung cp 192 knh thoi mi bng s dng chun c lp. B x l ting di (ECP) cung cp cht lng thoi rt cao. ECP da trn cng nn tng phn cng nh TRA. ng dng kh ting di cho php 128 knh mi bng. Nn tng bo hiu s tch tr (PDSPL) cu thnh nn tng phn cng cho a s thit b bo hiu v ting. PDSPL gm mt bng n c th ti xung phn mm ng dng a dng. Cc u cui tng i (ET) bao gm cc giao din mng 1.5, 2 v 155 Mbit. Giao din ng truyn ATM, ALI l mt thit b AXE tch hp hon ton. N bao gm mt giao din quang STM-1 ETSI 155 Mb/s gii hn cc t bo ATM u vo c mang trn VC-4 ca khung STM-1. ALI cn c da vo RPP 7.Kin trc cng my ch (server gateway) AXE 810 h tr kin trc mng ni bt vi nt c th th hin gia cc my ch v cc cng. AXE 810 h tr cc chun giao thc cho bo hiu gia cc nt khc nhau trong kin trc mng ny. Mt v d v my ch in thoi: Trong AXE s dng nh mt my ch in thoi, l gii php tch hp ENGINE. Trong trng hp ny, my ch in thoi gm cc h thng AXD 301 v AXE 810. Phn AXE iu khin cuc gi v cc chc nng thoi trong khi phn AXD 301 cung cp giao din cho mng ATM v bao gm mt b m phng chuyn mch (SE), chc nng cng phng tin c kt ni ti 17

mt modun ngun tch hp trong my ch. B m phng chuyn mch c iu khin bng AXE t nn tng modun ngun (RMP), iu khin ring r chuyn mch t cc ng dng. Do nn tng modun ngun c th c m rng iu khin mng ti ATM ring bit. Giao thc h thng ni b, s dng gia AXE v AXD 301, iu khin b m phng chuyn mch. SE thc hin giao thc H248 v phn phi cc ng iu khin n cc cng phng tin. Cc lin kt H248 c vn chuyn qua mng ATM. Chuyn mch nhm trong AXE, s dng cc thng bo kt ni, cu hi ngh, cc u cui bo hiu v trn cc thit b cho phpe dng li cc thit b hin c trong AXE. iu ny lm gim chi ph u t khi cc nh khai thc nng cp AXE nhm phc v nh mt my ch in thoi. Giao thc H248 l kt qu ca n lc hp tc gia ITU-T v IETF c dng iu khin: Chuyn mch. Thao tc lung phng tin. p ng cng ngh vn chuyn. Thng tr cc chc nng khc trong cng phng tin.

Trong truyn thng gia cc min phc v, giao thc BICC c dng cho bo hiu iu khin cuc gi v bo hiu ATM c dng cho bo hiu iu khin ti. Giao din chun m cho php cc nh khai thc xy dng cc mng bn hng. H thng AXE bao gm phn mm iu khin cuc gi (phn tch s v tuyn). N cng bao gm cc chc nng in thoi s dng trong cc mng in thoi chuyn mch mch (cc dch v tnh cc, thanh ton v cc kiu khc nhau h tr bo hiu). S dng AXE nh mt thnh phn ca my ch in thoi m bo di chuyn tri chy ti mng a dch v da trn ATM, hon ton trong sut vi cc chc nng in thoi hin c. u im khc ca vic s dng h thng AXE nh mt phn c bn trong my ch l n c th kt hp vi iu khin lu lng chuyn mch mch thng thng. 18

Kh nng ny c dng cho kt ni cc trung k. Nh c s pht trin tri rng ca AXE, mt tp hp th trng h thng bo hiu a dng c h tr. iu ny cng c ngha l c th lm gim phc tp ca cc cng phng tin. C. KT LUN Trong qu trnh thc tp, em c thc hnh trn h thng da vo s ch dn ca cc anh ch trong t v da vo nhng l thuyt hc c trn ging ng. Bit c nhng hng hc c th xy ra trong thc t cng nh cch khc phc nhng hng hc cng ging vi nhng g m c hc trn lp.

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D. NHN XT, NH GI CA CN B HNG DN

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