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nh gi, nhn xt v cho im ca n v thc tp

.. .. ... .. ..

Xc nhn ca n v thc tp

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MC LC

Danh sch hnh v .......................................................................................................... 1 Thut ng vit tt .......................................................................................................... 2 Li ni u ..................................................................................................................... 3 Phn I: Gii thiu v Viettel Global ............................................................................ 4

1.1. Gii thiu chung .................................................................................................. 4 1.2. Lch s hnh thnh, pht trin ........................................................................... 4 1.3. Chc nng, nhim v, ngnh ngh kinh doanh ................................................ 5

1.3.1. Chc nng ...................................................................................................... 5 1.3.2. Nhim v ........................................................................................................ 5 1.3.3. Ngnh ngh kinh doanh ................................................................................ 5

1.4. T chc b my ................................................................................................... 6 Phn 2: Tm hiu v MSOFTX3000............................................................................. 7

2.1. Tng quan ............................................................................................................ 7 2.2. Cc dch v v chc nng ................................................................................... 8

2.2.1. Chc nng c bn .......................................................................................... 8 2.2.2. Dch v c bn ............................................................................................... 9

2.3. Cu trc h thng MSOFTX3000 .................................................................... 11 2.3.1. Cu trc Vt l ............................................................................................. 11 2.3.2. Cu trc Logic ............................................................................................. 12

2.3.2.1. System support module (SSM) ................................................................ 12 2.3.2.2. Interface module (IM) ............................................................................ 13 2.3.2.3. Signaling processing module (SLLPM) ................................................. 13 2.3.2.4. Service processing module (SPM) .......................................................... 13 2.3.2.5. Operation and Maintenace module (OMM) .......................................... 14 2.3.2.6. Giao din kt ni MSOFTX3000 v cc phn t khc trong mng ....... 14

2.3.3. Kch thc vt l ca h thng.................................................................... 15 2.4. Cc thng s k thut ....................................................................................... 18

2.4.1. Dung lng h thng ................................................................................... 18 2.4.2. Kh nng x l ............................................................................................. 18 2.4.3. Cc thng s v ngun ................................................................................. 19 2.4.4. Cc c t v tin cy ............................................................................... 20

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2.4.5. c t v n ............................................................................................. 20 2.4.6. Cc yu cu v mi trng hot ng ........................................................ 20

2.5. Trin khai MSOFTX3000 ................................................................................ 21 2.5.1. Gii thiu mng ........................................................................................... 21

2.5.1.1. Cu trc mng di ng ca Huawei....................................................... 21 2.5.1.2. c trng ca mng ............................................................................... 24 2.5.1.3. Kh nng pht trin mng ...................................................................... 26

2.5.2. V tr ca MSOFTX3000 trong mng ......................................................... 27 2.5.2.1. MSC (VMSC) .......................................................................................... 27 2.5.2.2. GMSC ..................................................................................................... 31

2.5.3. Mt s m hnh mng trin khai MSOFTX3000 hin nay ....................... 32 2.5.3.1. Mng kt hp 2G/3G .............................................................................. 32 2.5.3.2. Mng d phng ...................................................................................... 33

2.6. Kt lun .............................................................................................................. 35 Ti liu tham kho ....................................................................................................... 36

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Danh sch hnh v

Hnh 1.1: T chc b my ca VTG ............................................................................... 6 Hnh 2.1: Cu trc vt l ca MSOFTX3000 ............................................................... 11 Hnh 2.2 : Cu trc logic phn cng ca MSOFTX3000 .............................................. 12 Hnh 2.3: Cc giao din kt ni ca MSOFTX3000 ..................................................... 14 Hnh 2.4: T N68E-22 ................................................................................................... 16 Hnh 2.5: T N68-22 ..................................................................................................... 16 Hnh 2.6: T cu hnh tch hp ...................................................................................... 17 Hnh 2.7: T x l dch v ............................................................................................ 17 Hnh 2.8: Gii php chuyn mch mm di ng ca Huawei ....................................... 22 Hnh 2.9: Chin lc pht trin ca mng li di ng Huawei ..................................... 27 Hnh 2.10: MSOFTX3000 hot ng nh VMSC ........................................................ 28 Hnh 2.11: MSOFTX3000 hot ng nh GMSC ........................................................ 32 Hnh 2.12: 2G/3G Combined Networking .................................................................... 33 Hnh 2.13: Backup 1+1 .................................................................................................. 34 Hnh 2.14: 1 + 1 cn bng ti ........................................................................................ 34

Danh sch bng biu

Bng 2.1: Cc giao din kt ni ca MSOFTX3000 ..................................................... 15 Bng 2.2: Cng sut h thng ........................................................................................ 18 Bng 2.3: M hnh lu lng tham chiu ..................................................................... 18 Bng 2.4: Cng sut x l ca h thng ........................................................................ 18 Bng 2.5: Cng sut x l giao thc ............................................................................. 19 Bng 2.6: Cng sut x l CDR .................................................................................... 19 Bng 2.7: Cng sut phn tch s .................................................................................. 19 Bng 2.8: Ngun cp ..................................................................................................... 19 Bng 2.9: Cng sut tiu th tng th ........................................................................... 20 Bng 2.10: c t v tin cy ..................................................................................... 20 Bng 2.11: c t n ................................................................................................ 20 Bng 2.12: Yu cu v mi trng kh hu ................................................................... 21 Bng 2.13: Chc nng ca cc phn t trong mng WCDMA ..................................... 23 Bng 2.14: Cc chc nng ca MSC server v MGW .................................................. 24 Bng 2.15: So snh li ch ca chuyn mch mm v chuyn mch knh ................... 26

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Thut ng vit tt

T vit tt Ngha ting anh BAM Back Administration Module BSC Base Station Controller CAMEL Customised Applications for Mobile Network Enhanced Logic CCF Call Control Function CDR Call detail record CFW Call forwarding CS Circuit switching CUG Closed User Group GMSC Gateway Mobile Services Switching Centre GSM Global System for Mobile Communications HLR Home Location Register IM Interface module IMSI International Mobile Station Identity IM-SSF IP Multimedia Service Switching Function IOT inter-office trunk MGCF Media Gateway Control Function MGW Media Gateway MOC Mobile originated call MSC Mobile switching centre MTC Mobile terminated call MVPN Mobile virtual private network ODB Operator Determined Barring OMM Operation and Maintenace module OSTA Open Standards Telecom Architecture PLMN Public Land Mobile Network PPIP Prepaid IP RBT Ring Back Tone RNC Radio Network Controler SLLPM Signaling processing module SMS Short Message Services SPM Service processing module SRF Specialised Resources Function SSF Service Switching Function SSM System support module TDM Time Division Multiplexing TMSI Temporary Mobile Station Identity USSD Unstructured Supplementary Service Data VLR Visit Location Register VVDN Voice and Video Double Number WCDMA Wideband Code Division Multiple Access WHSC Hot-swap and control unit WSIU System interface unit WSMU System management unit

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Li ni u

Cng vi s pht trin ca cc ngnh cng ngh nh in t, tin hc... cng ngh thng tin di ng trong nhng nm qua pht trin rt mnh m cung cp cc loi hnh dch v a dng p ng nhu cu ngy cng cao ca ngi s dng. K t khi ra i cho n nay thng tin di ng pht trin qua nhiu th h v nh du mt bc ngot ln trn nn cng ngh. Trong th k 21, th gii chng kin s bng n v nhu cu truyn thng khng dy c v s lng, cht lng v cc loi hnh dch v.

Ngy nay GSM vi nhng u im ni bt nh: dung lng ln, cht lng kt ni tt, tnh bo mt cao c mt ch ng vng chc trn th trng Vin thng Vit Nam. H thng WCDMA l s pht trin tip theo ca cc h thng thng tin di ng th h hai s dng cng ngh TDMA nh GSM, PDC, IS-136...WCDMA s dng cng ngh CDMA cho cc h thng thng tin di ng trn ton th gii, thc hin tiu chun ha giao din v tuyn cng ngh truyn thng khng dy. Trong bt k mng di ng no, th mng li l thnh phn rt quan trng v c u t ln v cng ngh cng nh chi ph v cc thit b trong mng li cng l ch c quan tm nghin cu v pht trin bi nhiu hng trn th gii.

Sau thi gian c thc tp ti Trung tm k thut Tng Cng ty C phn u t Quc t Viettel, c tm ti v nghin cu qua thc t cng nh l thuyt hon thnh bo co tt nghip. Bo co gm 2 ni dung chnh:

Phn 1: Gii thiu v Viettel Global

Phn 2: Tm hiu v HUAWEI MSOFTX3000 Mobile SoftSwitch Center

Do thi gian v kin thc bn thn c hn nn bo co khng trnh khi nhng thiu st v mt ni dung, rt mong nhn c s ch bo gp . Qua y em cng xin gi li cm n n cc anh ch ti Trung tm k thut Tng Cng ty C phn u t Quc t Viettel tn tnh hng dn v truyn t cho em nhng kin thc v kinh nghim qu gi trong qu trnh thc tp.

Xin chn thnh cm n

H Ni, ngy 18 thng 7 nm 2014

Sinh vin

L Trn Mnh

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Phn I: Gii thiu v Viettel Global 1.1. Gii thiu chung

Tp on Vin thng Qun i (Viettel) l doanh nghip kinh t quc phng 100% vn nh nc, chu trch nhim k tha cc quyn, ngha v php l v li ch hp php ca Tng Cng ty Vin thng Qun i. Tp on Vin thng Qun i (Viettel) do B Quc phng thc hin quyn ch s hu v l mt doanh nghip qun i kinh doanh trong lnh vc bu chnh - vin thng, cng ngh thng tin. Vi slogan "Hy ni theo cch ca bn", Viettel lun n lc pht trin vng bc trong thi gian hot ng.

Viettel l Tp on Vin thng v Cng ngh thng tin ln nht Vit Nam, ng thi c nh gi l mt trong nhng cng ty vin thng c tc pht trin nhanh nht th gii v nm trong Top 15 cc cng ty vin thng ton cu v s lng thu bao. Hin nay, Viettel u t ti 7 quc gia 3 Chu lc gm Chu , Chu M, Chu Phi, vi tng dn s hn 190 triu. Nm 2012, Viettel t doanh thu 7 t USD vi hn 60 triu thu bao trn ton cu.

Tng Cng ty C phn u t Quc t Viettel Viettel Global Investment Joint Stock Company l mt Cng ty thnh vin ca Tp on Vin thng qun i.

to iu kin thun li cho vic trin khai v qun l cc d n u t nc ngoi ca Viettel, ngy 24/10/2007, Tng Cng ty Vin thng Qun i, nay l Tp on Vin thng Qun i, quyt nh thnh lp Cng ty C Phn u t Quc t Viettel, nay l Tng Cng ty C phn u t Quc t Viettel, da trn lc lng ca Ban Qun l D n u t nc ngoi lm nng ct. Tp on gi c phn chi phi.

Tr s Tng Cng ty c ng k ti Tng 20, 21 Ta nh Viettel, s 1 ng Trn Hu Dc, T Lim, H Ni.

1.2. Lch s hnh thnh, pht trin

Tng Cng ty C phn u t Quc t Viettel (Viettel Global JSC), c thnh lp ngy 24/10/2007 theo Giy CNKKD s 0102409426, do S k hoch v u t TP H Ni cp.

Vn iu l ca Tng Cng ty theo Giy chng nhn ng k kinh doanh ln u ngy 24/10/2007 l 960 t VN.

Nm 2009, vn iu l c tng ln 3.000 t VN.

Nm 2011, vn iu l c tng ln 6.219 t VN

Ngy 26/8/2013, i hi ng C ng Tng Cng ty thng qua quyt nh i tn Cng ty C Phn u t Quc t Viettel thnh Tng Cng ty C phn u t Quc t Viettel v tng vn iu l ln 12.438 t ng.

Viettel Global bt u xc tin u t ra nc ngoi t nm 2006, tnh n nay (3/2014), Viettel Global v ang xc tin u t sang 9 th trng, trong 5 th

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ctrng i vo kinh doanh (Campuchia, Lo, Mozambique, Haiti, ng Timor), 2 th trng ang hon thin xy dng h tng chun b khai trng (Peru, Cameroon), 1 th trng mi nhn giy php u t (Burundi), 1 th trng ang kho st, m phn xin giy php (Tanzania).

D kin n 2020: * Th trng nc ngoi c tng s dn 500 triu. * Doanh thu th trng nc ngoi ln hn doanh thu ca th trng trong nc.

1.3. Chc nng, nhim v, ngnh ngh kinh doanh 1.3.1. Chc nng

- T chc b my: Xy dng m hnh t chc ca Tng Cng ty v cc cng ty con, cng ty lin doanh, u t nc ngoi. - Qun l: Thc hin qun l cc hot ng sn xut kinh doanh ca Tng Cng ty theo quy nh ca php lut v iu l ca Tng Cng ty. - Gim st, kim tra: Thc hin gim st, kim tra cc hot ng ca cc d n u t nc ngoi ca Tng Cng ty.

1.3.2. Nhim v - Nghin cu th trng, lp d n u t; - Tm kim, nh gi, m cc th trng v lnh vc kinh doanh mi; - Xy dng m hnh, t chc, c ch vn hnh cho cc cng ty con; - To ngun vn v qun l vn ti cc cng ty con; - Xy dng chnh sch, chin lc pht trin cho cc cng ty con; - T chc o to ngun nhn lc cung cp cho cc cng ty con; - Xy dng lc lng mnh t chc cc hot ng h tr th trng trong cc giai on ngn hn; - Tng hp, gim st cc d n, m bo trin khai cc d n ng chin lc, mc tiu, hiu qu do Tng Cng ty v Hi ng Qun tr t ra.

1.3.3. Ngnh ngh kinh doanh - Xy dng cng trnh bu chnh vin thng, cng ngh thng tin, truyn ti in. - Kho st, lp d n cng trnh bu chnh vin thng, cng ngh thng tin (tr kho

st thit k cng trnh). - Dch v qun l d n (khng bao gm dch v thit k cng trnh). - Bu chnh. - Hot ng vin thng khc bao gm: Cc dch v vin thng; pht trin cc sn

phm phn mm trong lnh vc in t, vin thng, cng ngh thng tin, internet. - Mua bn thit b in, in t vin thng, cng ngh thng tin v thit b thu pht

v tuyn in. - Mi gii xc tin u t. - Xut, nhp khu, y thc xut nhp khu cc mt hng cng ty kinh doanh. - Cho thu my mc, thit b v dng hu hnh khc.

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1.4. T chc b my

Hnh 1.1: T chc b my ca VTG

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Phn 2: Tm hiu v MSOFTX3000

2.1. Tng quan

HUAWEI MSOFTX3000 Mobile SoftSwitch Center (thng gi l MSOFTX3000) l thit b chuyn mch mm di ng bng thng rng c thit k bi Huawei. MSOFTX3000 c thit k theo cu trc modul ha vi nn tng phn cng da trn chun OSTA (Open Standard Telecom Architecture) s dng cc bus Ethernet nh bus ca cc bng ni a chc nng (backplane). MSOFTX3000 c th trao i v chuyn cc gi d liu c kch thc khc nhau.

y cng chnh l sn phm Mobile Softswitch m hin ang c trin khai ph bin trong cc mng di ng ca Viettel. Gm cc c im chnh nh:

- Cng ngh phn mm v phn cng nng cao - Ph hp cung cp dch v linh hot - Cc chc nng mng mnh m

MSOFTX3000 hot ng nh MSC server ti lp iu khin ca min CS trong mng li WCDMA. N trin khai cc chc nng, nh iu khin cuc gi v qun l kt ni cho cc dch v thoi v d liu da trn IP hoc TDM.

Nh vic h tr cc giao thc v chc nng ca c GSM v WCDMA, n cho php trin khai xuyn sut t GSM ln WCDMA. Vi truyn ti tch bit vi iu khin, MSOFTX3000 c th hot ng nh phn t mng li vi nhiu dng truyn ti nh IP, TDM trong sut qu trnh nng cp CN ca mng di ng (GSM => 3GPP R99 => 3GPP R4 => 3GPP R5), MSOFTX3000 c th hot ng nh cc phn t mng sau:

VMSC server/VLR GMSC server TMSC server MSC/SSP MGCF IM-SSF

Cc tnh nng sn phm:

- Nn tng phn cng tin tin - Kh nng cung cp dch v linh hot - Chc nng phi hp hot ng a dng v phong ph - Tch hp cao v bng thng rng - Kh nng x l mnh m - tin cy cao - Kh nng m rng xuyn sut - Kh nng tnh ha n nng cao - Chc nng o kim hiu sut tuyt vi

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- Chc nng O&M thun tin v hu dng

2.2. Cc dch v v chc nng 2.2.1. Chc nng c bn - Qun l di ng: Thng qua chc nng qun l di dng, hay cn gi l qun l v tr (location management (LM), mng c th xc nh c v tr hin thi ca MS v lu tr ti: HLR, MSC, VLR, MS (SIM/USIM). Dng LM m bo thng tin v tr c lu ti 3 thc th trn l nh nhau. LM ca thit b mng thc hin chuyn giao cho thu bao di ng.

- Cp nht v tr - H tr chuyn giao - Cp nht v tr kt hp

- Qun l an ninh

- Nhn thc v m ha GSM - Nhn thc v m ha UMTS - Nhn thc ln 2 - Chuyn i gia b 3 nhn thc v b 5 - Phn phi li TMSI - Nhn dng IMSI

SM thc hin cc chc nng sau:

- Ngn cc thu bao b chn khng c kt ni vi mng - Ngn vic gian ln mng t cc thu bao gi mo - m bo truyn dn tin cy d liu bo hiu ca thu bao

- Chuyn giao: Qu trnh chuyn giao ch ra rng cuc gi c x l t mt knh v tuyn sang mt knh khc do vn tn hiu trong mng hoc do vic di chuyn ca mt thu bao. i vi mng GSM v UMTS, chuyn giao c thc hin bi MSOFTX3000 bao gm:

- Chuyn giao Intra-MSC - Chuyn giao Inter-MSC c bn - Chuyn giao trc

- X l cuc gi:

- Kt ni cuc gi - Phn tch s - Chn tuyn ng

- Tnh cc:

Cc kiu CDR: MSOFTX3000 h tr nhiu kiu CDR p ng nhiu yu cu khc nhau ca nh cung cp, c mt s kiu tnh cc nh: Mobile originated call

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(MOC), Mobile terminated call (MTC), Call forwarding (CFW), Mobile originated SMS (MO_SMS), Mobile terminated SMS (MT_SMS), Transit call (TRANSIT), Inter-network transit call (OT_TRANSIT) v cc dch v:

- Dch v thng bo cc - Ha n nng

- SSP: MSOFTX3000 cc chc nng gsmSSP, bao gm:

- Chc nng iu khin cuc gi (CCF) - Chc nng chuyn mch dch v (SSF) - Chc nng phn ha ti nguyn (SRF)

MSOFTX3000 h tr CAMEL 4, tng thch vi CAMEL 3, CAMEL 2, CAMEL 1.

- Ch mng chng ph - Overlay Networking Mode - Ch mng trung tm - Target Networking Mode

2.2.2. Dch v c bn

- Teleservices: Huawei MSOFTX3000 h tr truyn thng hai hng cho cc khch hng sau:

- Cc khch hng di ng ca vn phng chi nhnh - Cc khch hng khc c kt ni nh MS ca cc vn phng khc v cc thu bao mng c nh.

H tr cc dch v Teleservices c bn sau:

- Dch v thoi - Dch v SMS - Dch v fax GSM - Dch v bearer GSM - Dch v bearer UMTS

- Dch v b sung: Cc dch v b sung (SS) b tr hoc chuyn i cho cc dch v teleservices c bn. Chng c cung cp cho cc thu bao ng thi vi cc dch v c bn. MSOFTX3000 h tr nhiu dch v SS c nh ngha trong m t ca 3GPP:

- Dch v chuyn tip cuc gi - Dch v chn cuc gi - Dch v nhn din thu bao - Dch v b sung cho cuc gi - Dch v gi a im - Unstructured Supplementary Service Data (USSD) - Dch v nhm ngi dng kn (Closed User Group - CUG)

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- Dch v ODB: Operator Determined Barring (ODB) c iu khin bi nh cung cp mng. N c chuyn i thng qua HLR qun l d liu. Nh cung cp hn ch bng thng cuc gi ca thu bao da trn cc c tnh khc nhau, c bit l kh nng kinh t. iu ny m bo rng cc nh cung cp khng phi tr qu nhiu chi ph cuc hi thoi.

ODB c th c dng trong c dch v u cui ngi dng v dch v bearer ngoi tr cc cuc gi khn cp. So snh vi SSs trc , ODB c u tin cao hn. Khi 2 dch v ny xung t, SS s b cm.

Cc dch v ODB c h tr

- Chn cc cuc gi chiu i - Chn cc cuc gi i quc t - Chn cc cuc gi chiu i quc t ngoi tr cc cuc gi trc tip n mng PLMN nh. - Chn cuc gi ra bn ngoi khi chuyn vng ngoi mng PLMN quc gia. - Chn cc cuc gi n - Chn cc cuc gi n khi chuyn vng bn ngoi mng PLMN nh. - Chn chuyn vng bn ngoi mng PLMN nh. - Chn cc cuc gi tnh cc cao (thng tin) - Chn cc cuc gi tnh cc cao (entertainment) - Chn vic qun l cc dch v b sung.

- Cc dch v IN: Huawei MSOFTX3000 cung cp chc nng ca gsmSSF, h tr CAMEL 3 v tng thch vi CAMEL 2 v CAMEL 1. N h tr cc dch v IN sau:

- Dch v tr trc (PPS) - Dch v mng ring o di ng (MVPN) - IP tr trc (PPIP) - Bn gi hoc bn b gi tr ph - S gia nh - Cuc gi IP ti u cui c nh cho cc thu bao tr sau

- Cc dch v gi tr gia tng:

- Cc dch v a phng tin - Cc dch v v tr di ng - Cc dch v Ring Back Tone (RBT) - Dch v truy nhp ngang bng - Dch v hn ch chuyn vng tng cng - Voice and Video Double Number (VVDN) - Dch v s thay th

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2.3. Cu trc h thng MSOFTX3000 2.3.1. Cu trc Vt l

Hnh 2.1: Cu trc vt l ca MSOFTX3000

Phn cng MSOFTX3000 bao gm 3 phn:

- OSTA subrack. - BAM (Back Administration Module) - iGWB (cng kt ni vi h thng Billing)

BAM (cc u cui bo dng cc b - LMT0 v iGWB hnh thnh background ca MSOFTX3000 cung cp cc chc nng OAM v chc nng qun l CDR.

OSTA subrack l thnh phn chnh ca MSOFTX3000, cung cp cc chc nng bo hiu, x l dch v v qun l ti nguyn.

Kt ni gia cc thit b ca h thng MSOFTX3000:

- Cc subrack kt ni vi nhau thng quan giao din Ethernet ni. Mi subrack c kt ni ti LAN Switches 0 v 1 thng qua 2 cp mng. - Cc subrack kt ni vi BAM v iGWB thng qua giao din Ethernet ni. BAM v iGWBkt ni vi LAN Switches 0 v 1 thng qua 2 cp mng. - BAM v iGWB kt ni ti LAN Switch bng cp mng. LMT tng tc vi BAM vi GWB thng qua giao thc TCP/IP theo ch client/server.

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2.3.2. Cu trc Logic S cu trc logic phn cng MSOFTX3000 nh trong hnh di:

Hnh 2.2 : Cu trc logic phn cng ca MSOFTX3000

Cu trc logic ca h thng phn cng MSOFTX3000 gm 5 module: System support module (SSM), Interface module (IM), Signaling processing module (SLLPM), Service processing module (SPM) v Operation and Maintenace module (OMM).

2.3.2.1. System support module (SSM) SSM thc hin cc chc nng sau:

+ Np d liu v phn mm. + Qun l thit b v bo tr. + Kt ni gia cc board (inter -board).

SSM bao gm cc khi thnh phn sau:

+ Khi qun l h thng (WSMU System management unit):

WSMU l board iu khin chnh ca mt subrack, thng qua cc bus h thng v cc cng ni tip, WSMU c th t c cc chc nng nh: iu khin ti, cu hnh d liu v iu khin trng thi lm vic ca ton b thit b trong h thng.

+ Khi giao din h thng (WSIU System interface unit), thc hin chc nng sau:

- Giao din Ethernet cung cp cho WSMU - Chuyn i mc i vi tn hiu ng b ca cng ni tip t WSMU. - Hai giao din vt l cung cp cho cng ni tip ng b. - Nhn dng s hiu subrack bng cch thit lp DIP switch.

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+ Hot- swap v khi iu khin (WHSC Hot-swap and control unit), thc hin cc chc nng sau:

- Cu kt ni gia cc bus chia s ti nguyn bn (left and right) - iu khin Hot - Swapp ca cc board. - Intra-subrack LAN bus switching

+ Core LAN Switch, thc hin cc chc nng sau:

- a kt ni gia nhiu subrack. - Kt ni gia cc subrack v thit b qun l.

2.3.2.2. Interface module (IM) IM cung cp cc giao din vt l gm:

- Giao din bng hp (Narrowband): Khi giao din E1_pool (WEPI) cung cp 8 giao dinlung E1 thc hin framing v chc nng ng giao din (line int erfacing function) (MTP1 function). WEPI c tc ng vi khi x l MTP2 (subboard ca WCSU) camodule x l bo hiu lp thp. - Giao din ATM -2M : WEPI cung cp 8 giao din lung E1 v 2 cp tn hiu HW 8 Mbit/s kt ni vi WEAM. WEAM phn on v tp hp li cc cell ATM trong lung d liuv chuyn bo hiu ti WBSG thng qua bus LAN ni b. - Giao din FE : WIFM cung cp giao din Ethernet 100 Mbit/s bng cch cu hnh FEPsubboard v WBFI. N gom cc lung thng tin bo hiu bng rng li v phn phi chng cho cc khi x l ring da trn a ch IP v s hiu cng. - Tn hiu bng hp yu cu ng b xung nhp. MSOFTX3000 cung cp 2 loi ngun xung nhp, BITS v E1 v WCKI cung cp giao din vi bn ngoi.

2.3.2.3. Signaling processing module (SLLPM)

SLLPM cung cp chc nng x l giao thc lp di, bao gm khi x l SS7 MTP2 (WCPC) v khi x l SCTP (WBSG).

- WCPC x l SS7 MTP2 qua lung E1 bng hp v lin lc vi khi x l dch v (WCSU) thng qua bus giao din ni. WCPC l mt subboard ca WCSU. - WBSG x l bo hiu lp di qua IP v ATM (bng cch s dng giao din ATM 2 Mbit)v phn phi chng ln board x l dch v lp trn (upper layer service processing board).

2.3.2.4. Service processing module (SPM)

SPM bao gm khi x l dch v (WCCU/WCSU), khi c s d liu trung tm (WCDB), khi c s d liu VLR v khi iu khin media gateway (WMGC):

- WCCU x l giao thc bo hiu lp 3 hoc lp cao hn (MTP3, M3UA, ISUP, SCCP,TCAP, MAP v CAP) cn thit i vi cc c im ca dch v. N cng thc

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L Trn Mnh D10VT6 14

iu khin cuc gi trn lp ng dng v x l cc dch v CAMEL. Trong h thng ny, 2 WCPC gn trn WCCU to thnh mt WCSU. - Ging nh mt khi c s d liu trung tm, WCDB lu tr ti nguyn tp trung, nh ti nguyn trung k lin tng i (IOT inter-office trunk), d liu thu bao tng i ni b (local office subcriber data), v trng thi gateway. N cng cung cp dch v truy vn ti nguyn cuc gi i vi khi x l dch v. - WVDB l mt c s d liu ng, cung cp chc nng ca VLR. - WMGC iu khin H.248 media gateways.

2.3.2.5. Operation and Maintenace module (OMM)

OMM thc hin cc chc nng sau:

- Thc hin vn hnh, bo dng v qun l thit b. - Cung cp giao din ngi my (man-machine) ngi s dng thc hin vn hnh v bo dng. - Cung cp giao din i vi h thng qun l mng (NMS).

cung cp cc CDR, cn phi c cu hnh iGWB trong MSOFTX3000. N gip cho vic qun l CDR v cung cp giao din vi h thng Billing.

2.3.2.6. Giao din kt ni MSOFTX3000 v cc phn t khc trong mng

Hnh 2.3: Cc giao din kt ni ca MSOFTX3000

Bo co thc tp

L Trn Mnh D10VT6 15

Kt ni Giao din Giao thc

MSC Server - MGW Mc H.248 MSC Server - RNC Iu-CS RANAP

MSC Server - BSC (GSM) A BSSAP MSC Server-VLR B Intemal protocol

VLR-HLR D MAP MSC Server-MSC Server Nc MAP, TUP/ISUP/BICC

MSCMSC (GSM) E MAP, TUP/ISUP/BICC MSC ServerSMC E MAP

VLRVLR G MAP MSC ServerGMLC Lg MAP

SSP-SCP - GAP GMSC ServerPSTN GMSC

ServerPLMN - TUP/ISUP

MSC ServerSGSN Gs BSSAP+ MSC ServerNMS - MML MSC Server BC - FTP/FTAM

Bng 2.1: Cc giao din kt ni ca MSOFTX3000

2.3.3. Kch thc vt l ca h thng T (Cabin)

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L Trn Mnh D10VT6 16

MSOFTX3000 c 2 loi t: N68E-22 v N68-22 vi cc kch thc c th nh sau:

T N68E-22:

+ Kch thc (WxDxH mm): 600 x 800 x 2200

+ S cabinet vi cu hnh y : 5

+ Khi lng ca t cu hnh tch hp: 100 kg (empty), 365 kg (full configured).

+ Khi lng ca t x l dch v: 100 kg (empty), 265 kg (full configured).

+ Chiu cao ti a: 46U (1U = 44,45 mm).

Hnh 2.4: T N68E-22

T N68-22

+ Kch thc (WxDxH mm): 600 x 800 x 2200

+ S cabinet vi cu hnh y : 5

+ Khi lng ca t cu hnh tch hp: 135 kg (empty), 400 kg (full configured).

+ Khi lng ca t x l dch v: 135 kg (empty), 300 kg (full configured).

+ Chiu cao ti a: 46U (1U = 44,45 mm).

Hnh 2.5: T N68-22

Da trn cu hnh cc thnh phn trong mt t, cc t MSOFTX3000 c chia lm:

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L Trn Mnh D10VT6 17

- T cu hnh tch hp (Integrated configuration cabinet) y l t bt buc, n c th i km vi 1 hoc 2 subrack x l dch v. N cung cp cc chc nng sau:

- Cung cp cc giao din m rng IP, ng h, TDM v ATM - Lu tr chi tit cuc gi - Cung cp ton b dch v x l c bn ti thiu cho h thng. Cc thnh phn bao gm:

1. T 2. Hp phn phi ngun (PDB) 3. Khung con 1 4. Thng qut 5. Khi gim st chnh ca rack (MRMU) 6. LAN Switch 7. Mng cp 8. KVMS 9. Khung con 0 10. Cc tm ph Hnh 2.6: T cu hnh tch hp

- T x l dch v (Service processing cabinet)

T x l dch v kt hp cung cp dch v vi t cu hnh tch hp. T ny l t khng bt buc, ty chn trong h thng.

Mi MSOFTX3000 c th c lp thm 1 t x l dch v na.

Mi t x l dch v c th m rng thm 2 subrack. Nu t cha c cu hnh y, th cc v tr trng phi c lp cc tm ph bo v.

Hnh 2.7: T x l dch v

Ngoi thnh phn chnh l t th h thng cn c cc thnh phn khc nh:

- Ngun cp - Cc subrack, bao gm: T8280, PEM, Fan Box

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L Trn Mnh D10VT6 18

- Cc bng mch, c phn loi da trn v tr ci t, chc nng vt l hoc chc nng logic nh: Front boards, back boards, v backplane hoc UPB, USI, SWU, SWI, SMM, v SDM - Cc thit b bn trong khc - Cc thit b ngoi vi - Cp ni

2.4. Cc thng s k thut 2.4.1. Dung lng h thng

Thng s c t S thu bao ti a (VMSC server) 12.000.000 (0.025 Erl/thu bao) iu khin ti a s MGW 300 iu khin ti a s RNC 256 iu khin ti a s BSC 256

Bng 2.2: Cng sut h thng

Thng s Gi tr thng thng Lu lng trung bnh ca thu bao di ng trong gi cao im

0.025 Erl

Thi lng trung bnh cuc gi ca mt thu bao di ng

60s

Thi gian ng k v cp nht v tr ca mt thu bao di ng trong gi cao im

2

Thi gian chuyn giao ca mt thu bao di ng / cuc gi

0.2

S SMS ca mt thu bao di ng trong gi cao im

2

Bng 2.3: M hnh lu lng tham chiu

Cch m rng dung lng:

Dung lng ca h thng c xc nh bi s subrack x l dch v, m rng dung lng ca h thng cn lp thm cc subrack, s subrack ti a trong 1 MSOFTX3000 l 18 subrack.

2.4.2. Kh nng x l

Thng s c t BHCA cho VMSC server 30M BHCA cho GMSC server 60M BHCA cho TMSC server 60M

Bng 2.4: Cng sut x l ca h thng

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L Trn Mnh D10VT6 19

Mc c t Kiu m ha im bo hiu c h tr Kiu m ha 14 bit v 24 bit S im ngun bo hiu ti a Mc nh l 32 (ti a 256) S im ch bo hiu ti a Mc nh l 256 (ti a 64000) Bng thng bo hiu IP ti a 160 x 1000 Mbit/s S tuyn SCTP ti a 21504 S tuyn MTP 64-kbit/s ti a c h tr bi mt tin trnh WBSG

128

S tuyn MTP 2-Mbit/s ti a c h tr bi mt tin trnh WBSG

8

S tuyn SCTP ti a c h tr bi mt tin trnh WBSG

256

Tc ti a mt tin trnh WIFM gi gi tin i 129000 gi/s Clock stratum Stratum- 2A

Bng 2.5: Cng sut x l giao thc

Mc c t di trung bnh ca mt CDR thng thng 400 byte Bng thng m CDR trn mt modun WCCU n 600 MB (400 MB b nh v

200 MB b nh flash) Cng sut lu tr cho CDR trn iGWB 300 GB Cng sut x l CDR ca iGWB 4000 CDR/s

Bng 2.6: Cng sut x l CDR

Thng s c t di ti a ca mt s c phn tch 32 k t S tin t gi ti a 65000 MSRNs/HONs ti a 10000 S m GT ti a 60000 S GT ti a trn mt tuyn 64-kbit/s MTP n 60 GTT/s

Bng 2.7: Cng sut phn tch s

2.4.3. Cc thng s v ngun

Mc c t in p hot ng (tiu chun) in p nh mc -48V DC

Khong in p -40V n -57V in p hot ng (in Commonwealth of Independent States)

in p nh mc -60V DC Khong in p -51V n -69V

Dng mt chiu hot ng 63A (mt tuyn n) Bng 2.8: Ngun cp

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L Trn Mnh D10VT6 20

Ch : Mi t s dng 3 ngun cp u vo song song. Dng hot ng ca mi ngun cp thp hn mc 63A. c t ch c s dng tham chiu. Chng ph thuc thay i vo cu hnh thit b. Dng hot ng ti a ca mt ngun cp n s tng v cng sut tiu th c gim thiu hiu qu thng qua thit k ca MSOFTX3000.

Phn t chc nng Cng sut tiu th ti a Tnh ton Mt subrack 2.0 kW tnh ton cng sut tiu th

ca phn t ca BTU, chuyn i gi tr da trn 1W=3.413 BTU

Mt t (cu hnh y )

5.5 kW

Bng 2.9: Cng sut tiu th tng th

2.4.4. Cc c t v tin cy

Thng s c t tin cy ca h thng (A) Thi gian trung bnh gia li (MTBF)

99.99953 % 24 nm (cu hnh y ) 42 nm (mt subrack)

Thi gian trung bnh cho sa cha (MTTR) Khong thi gian DOWN

1 gi (khng k thi gian chun b) < 3 pht/nm

Khong thi gian mch khi ng li < 10s (khi ng li tin trnh) < 150s (khi ng li mch service)

Khong thi gian hon i tin trnh Khong thi gian khi ng mt subrack n

< 5s < 159s (khi ng t Flash) < 279s (khi ng t OMU subrack khc)< 419s (khi ng t OMU cng subrack)

Khong thi gian khi ng li mt h thng c cu hnh y

< 249s (mch service bt u t Flash) < 15 pht (mch service khi ng t OMU)

Khong chuyn i Dual-homing Bng 2.10: c t v tin cy

2.4.5. c t v n

Thng s c t NEBS 7.8 Ben ETSI 7.2 Ben

Bng 2.11: c t n

2.4.6. Cc yu cu v mi trng hot ng

Di y l mt s tham s yu cu v mi trng hot ng ca MSOFTX3000:

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L Trn Mnh D10VT6 21

Mc Khong(ct gi) Khong(vn chuyn) Khong(khi vn hnh) cao so vi mc nc bin 4000 m 3000 m 3000 m

p sut khng kh Nhit

70 kPa n 106 kPa

+5oC n +40oC

70 kPa n 106 kPa

-40oC n +70oC

70 kPa to 106 kPa

Hot ng di hn: +5oC n +40oC

Hot ng ngn hn: -5oC n +50oC

Tc thay i nhit m

1oC/pht

5% n 85%

3oC/pht

10% n 100%

5oC/pht

Bc x mt tri 1120 W/s2 1120 W/s2+ 700 W/s2 Bc x nhit 600 W/s2 600 W/s2 600 W/s2Tc gi 30 m/s 30 m/s 1 m/s Ma 6 mm/pht IP level IP50

Bng 2.12: Yu cu v mi trng kh hu

2.5. Trin khai MSOFTX3000

2.5.1. Gii thiu mng

2.5.1.1. Cu trc mng di ng ca Huawei

Bng cch tch bit bearer khi vic iu khin, mt m hnh mng, nh cng ngh chuyn mch mm (softswitch) l cng ngh li, c th s dng cc mng bearer nh IP v TDM. y l tnh nng then cht ca cng ngh chuyn mch mm. Hin nay, hu ht cc nh cung cp chn cng ngh chuyn mch mm xy dng mng li di ng (CNs). Bng cch s dng m hnh mng phn tn v IP beares, chuyn mch mm di ng a ra vic truyn ti vi cc li ch sau:

- Gim chi ph hot ng bng cch ci thin hiu qu truyn ti ca mng. - m bo vic u t bng cch cung cp mt gii php pht trin xuyn sut t mt m hnh ti cc m hnh khc khi thng tin v lu lng ca thu bao tng.

Gii php chuyn mch mm di ng ca Huawei c da trn cc yu cu v tnh nng v mng ca nh mng. N cung cp mt s mng tch hp 2G hoc 3G d dng vn hnh v bo dng. Gii php h tr cc s kt ni ca GSM, 3GPP R99, 3GPP R4 v 3GPP R5.

Hnh di ch ra m hnh mng thng thng ca gii php chuyn mch mm di ng ca Huawei cho 3GPP R4.

Bo co thc tp

L Trn Mnh D10VT6 22

Hnh 2.8: Gii php chuyn mch mm di ng ca Huawei

Phn t Chc nng

MSC

MSC l trung tm chuyn mch trong mt mng WCDMA. N kt hp vi VLR. Cc chc nng ca n bao gm: - iu khin cuc gi - Iu khin truy nhp MGW - Phn phi ti nguyn - X l bo hiu - nh tuyn - Phn quyn - Tnh cc MSC c s dng cung cp cc dch v c bn, qun l di ng , v dch v a phng tin cho cc thu bao

MGW MGW hp nht vi MRFP chuyn i nh dng ca dng media, thng bo pht, cung cp cc ti nguyn hi ngh v cc ti nguyn media khc.

HLR

HLR l mt c s d liu cho vic qun l thu bao di ng. N cha cc thng tin sau: - Thng tin thu bao - Trng thi thu bao

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L Trn Mnh D10VT6 23

- Thng tin v tr MS - MDN - IMSI (MIN)

GGSN

Giao din gia mng GPRS (General Packet Service) v mng IP bn ngoi. Chc nng ng k v tr trong GGSN lu tr thng tin thu bao v thng tin nh tuyn (cn cho to ng hm lu lng d liu gi t GPRS MS ti SGSN khi MS ng k) cho mi thu bao ca GGSN c t nht mt PDP context hot ng

SGSN

SGSN l mt NE cung cp cc dch v GPRS. SGSN chuyn cc gi IP u vo v u ra ti cc MS trong vng dch v ca n. SGSN cung cp cc chc nng sau y: - nh tuyn v chuyn cc gi tin ca cc thu bao - M ha v nhn thc - Qun l phin - Qun l di ng - Qun l tuyn cc b - To v a ra cc thng tin tnh cc

BSS

Trong GSM, BSS cha BSC (Base Station Controller) v BTS (Base Transceiver Station) kt hp vi nhau. N c iu khin bng MSC, v c s dng a ra vng ph v tuyn cho mt vng a l c nh ngha gi l mt cell.

UTRAN

Trong UMTS, UTRAN cha NodeB v RNC (Radio Network Controller) kt hp vi nhau. No c iu khin bi MSC, v c s dng a ra vng ph v tuyn cho mt vng a l c nh ngha gi l mt cell.

Bng 2.13: Chc nng ca cc phn t trong mng WCDMA

Da trn chin lc pht trin ca min CS ca mng li di ng v yu cu xy dng mt mng ton IP, MSC v 3GPP R99 c chia lm 2 phn: MSC server v MGW, trong 3GPP R4 v cc ph

n bn sau. Bng 2 m t chc nng ca MSC server v MGW.

Phn t mng Chc nng Sn phm

MSC server

Kt ni BSS hoc UTRAN, v thc hin cc chc nng sau ca min CS: - Qun l di ng - Qun l bo mt - X l chuyn giao - X l bo hiu - X l cuc gi

MSOFTX3000 cung cp bi Huawei phc v nh mt MSC server

Bo co thc tp

L Trn Mnh D10VT6 24

- Qun l d liu thu bao (chc nng ca VLR)

MGW

L im cui ca PSTN ca mng PLMN (Public Lan Mobile Network) c kt ni vi MSOFTX3000. Thc hin cc chc nng sau: - Truyn ti media - Qun l Bearer - M ha/Gii m cc tn hiu s - Kh nhiu - Kt ni hi ngh

UMG8900 cung cp bi Huawei phc v nh mt MGW

Bng 2.14: Cc chc nng ca MSC server v MGW

2.5.1.2. c trng ca mng

H tr vic tch hp 2G/3G

Trong sut qu trnh m rng mng, cc nh cung cp ang v s hot ng trn c 2 mng 2G v 3G phi xem xt lm th no m bo vic u t vo mng 2G.

Lin quan n vic ny, Huawei a ra mt gii php kt hp GSM/UMTS gip cc nh cung cp. Gii php ny h tr vic kt ni ng thi BSS v UTRAN ti mng, cung cp cc dch v cho thu bao 2G v 3G ti cng mt thi im. Mng 2G v 3G c th chia s cc ti nguyn thit b. Do vy, gii php ny c cc li ch sau:

- Ct gim chi ph kinh doanh ca nh cung cp (CAPEX) - Nng cao s hi lng ca thu bao - Hp nht vic vn hnh mng - n gin ha topo mng - Tit kim cc ti nguyn mng

Gii php ny c th c nng cp online v cu hnh linh hot trong sut qu trnh pht trin t GSM ln UMTS.

Hiu qu cao

Trong gii php chuyn mch mm di ng ca Huawel, cc MGW c th c t nhiu thnh ph, v IP bearers c th c s dng gia cc MGW. N n gin topo kt ni mng v vic qun l mng., tit kim ti nguyn truyn dn cho nh cung cp.

Cc tnh nng:

- Mc tch hp cao - Bng thng ln - Kh nng x l mnh m

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L Trn Mnh D10VT6 25

N tit kim khng gian phng cha thit b, v gim cng sut tiu th. Nh cung cp c th tp trung cc hot ng O&M vo mt s lng nh cc trm chuyn mch mm, nh vy gim chi ph hot ng (OPEX).

Nh vo kin trc m v cng ngh phn mm phn tn, gii php chuyn mch mm Huawei gip cc nh cung cp pht trin dch v nhanh chng. Thng k ch ra rng vng i pht trin ca dch v da trn mng chuyn mch mm ngn hn 50% so vi thit b chuyn mch tiu chun.

tin cy cao

Chuyn mch mm Huawei h tr gii php tp kt hp MSC (MSC Pool), c th thc hin t ng backup v chu cc li ca mng ti mc MSC. N h tr a ch backup ca HLR. Da trn cc iu kin c th, Huawei s dng mt cch linh hot cc ch ny. Nh c ch iu khin lung cp mng, Huawei m bo cht lng thoi khng b nh hng khi mng IP bear b nghn. C ch iu khin lung nng cao m bo tin cy mng cao ngay c khi lu lng ln.

Trin khai xuyn sut

Mng hi t c nh di ng (FMC) l xu hng ca vic pht trin mng. Trong sut qu trnh ny, iu quan trng l tch hp thit b ca cc mng c nh v di ng. Hin nay, Huawei a ra cc dch v tch hp, v cng c mt s thit b c th hot ng trong c mng c nh v di ng.

Trong tng lai, vic hi t mng c nh di ng ti cp mng c th thc hin thng qua phn h IMS. Dng Huawei MSOFTX3000 V200 c pht trin da trn nn tng ATCA v tha hng hon ton cc chc nng t nn tng CPCI. N cho php MSOFTX3000 pht trin xuyn sut vo IMS MGCF, do vy ti thiu chi ph u t (CAPEX) ca nh cung cp.

Nhiu li ch hn

So snh vi mng chuyn mch knh (SCN), mng chuyn mch mm di ng cung cp li ch cho nh cung cp. Xem bn di:

Li ch M t

CAPEX thp hn

Khng nh kin trc ng ca mng SCN thng thng, mt mng chuyn mch mm di ng a ra cc dch v thng qua cc phng thc sau: - iu khin li - Cc giao din m - Cc giao thc thng dng N gip nh cung cp xy dng mt mng m v gi thnh thp, ci thin tc c trin khai dch v. Cng ngh chuyn mch mm di ng cng cho php st nhp xuyn sut t mng 2G ln mng 3G v IMS. Ct gim CAPEX cho vic st nhp mng. Vic tp trung cc thit b chuyn mch

Bo co thc tp

L Trn Mnh D10VT6 26

mm di ng vi bng thng ln c kh nng s dng ti nguyn thit b cao hn nh cc kha cnh sau: - Cc GW phn tn ct gim cc tuyn thay th trong truyn dn cc b. - M hnh mng phng khng yu cu xy dng lp ni tip - IP bearer gim chi ph truyn dn cho mng Thng k ch ra rng CAPEX ca mt mng chuyn mch mm di ng thp hn 20% v 30% so vi SCN thng thng.

OPEX thp hn

So vi cc thit b chuyn mch thng thng, thit b chuyn mch di mm di ng c cc tnh nng sau: - Bng thng x l tt hn - Mc tch hp cao hn - Cng sut tiu th thp hn iu ny gip tit kim 60% n 70% khng gian thit b v 30% cng sut tiu th.

An ninh mng c tng

cng

Mng chuyn mch mm di ng s dng c ch tin cy mc mng, nh: - Dual homing - MSC Pool Ch Dual homing thc hin backup thit b. MSC Pool a ra cc li ch sau: - Chia ti v chia s ti nguyn tin cy gia cc MSC - Ci thin vic s dng hiu qu ti nguyn mng li - Tit kim chi ph u t thit b - Trnh nghn mng - a ra c ch t ng backup theo thi gian thc v kh nng chu li mng ti mc MSC

Dch v mi c

th cung cp

nhanh v d dng

Cc dch v mi c th c cung cp da trn lp chuyn mch mm di ng m khng nh hng n MGW ti lp truyn ti. Do vy, mng chuyn mch mm di ng cho php ngi dng pht trin v cung cp cc dch v mi kinh hot v nhanh chng theo cc cch sau: - Cu trc mng m rt ngn chu k pht trin dch v. - Vic qun l dch v tp trung gip trin khai dch v d dng

Bng 2.15: So snh li ch ca chuyn mch mm v chuyn mch knh

2.5.1.3. Kh nng pht trin mng

MSOFTX3000 h tr ng dng ca 3GPP R4 CS CN v tng thch vi mng GSM v 3GPP R99. N cho php mng R4 pht trin xuyn sut n 3GPP R5/R6. Hnh di ch ra chin lng pht trin mng.

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L Trn Mnh D10VT6 27

Hnh 2.9: Chin lc pht trin ca mng li di ng Huawei

Trong gii php 3GPP R5, IMS hot ng lu di vi CS CN ca 3GPP R4 nh mt mng iu khin dch v xy dng bn trn min PS. Hai mng c th h tr ln nhau. N cng h tr mng di ng vi mng c nh.

Do tip tc ci thin trong c ch QoS ca dch v IP thi gian thc ca giao din v tuyn PS, vic tng cng kh nng x l IP ca u cui khng dy v s chn mui c ch phin QoS da trn end-to-end ca mng IMS, IMS s tin n thay th CS R4 trong min truy nhp 3G. MSOFTX3000 c th c m rng d dng vi cc thit b MGCF v UMG8900 c th c nng cp ln IM MGW. Gip m bo chi ph u t.

2.5.2. V tr ca MSOFTX3000 trong mng

MSOFTX3000 h tr cc ch hot ng trong mng nh:

- MSC/VLR (VMSC) - GMSC - TMSC - Kt hp GMSC/VMSC/TMSC Trong , trn thc t, ngi ta thng trin khai hai ch chnh l MSC, VMSC v GMSC.

2.5.2.1. MSC (VMSC)

MSOFTX3000 h tr rt nhiu giao thc, nh H.248, BSSAP, RANAP, MAP, CAP, ISUP, TUP, BSSAP+. N c th hot ng nh mt MSC server v VLR trong mng hay cn gi l VMSC. Khi trin khai vi UMG8900 v Chc nng phi hp hot ng chia s (SIWF). MSOFTX3000 h tr ch truy nhp BSS/UTRAN v c th hot ng nh VMSC 2G, VMSC 3G hoc VMSC 2G/3G tch hp trong mng. Hnh di ch ra kt ni mng c bn:

Bo co thc tp

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Hnh 2.10: MSOFTX3000 hot ng nh VMSC

Trong mng c ch ra. MSOFTX3000 gii hn bo hiu thu bao/mng di ng c nh ngha bi khuyn ngh R99 24.008 v R98 04.08. N chuyn i bo hiu ti trm lin bo hiu c truyn trn giao din Nc. Thc t, MSOFTX3000 lu tr thng tin thu bao ca thu bao di ng v thng tin lin quan CAMEL v n c tch hp VLR. GMSC thc hin kt hp hot ng gia MSOFTX3000 v PSTN/PLMN.

Thng qua giao din Mc, MSOFTX3000 iu khin u cui bearer v dng media ca mng truy nhp v pha mng backbone trong UMG8900. Giao din, giao thc v cc ch giao din vt l gia MSOFTX3000 v cc phn t mng khc nh trn hnh.

Vai tr ca MSOFTX3000 lc ny c th hin thng qua cc dch v c bn m n cung cp:

- Dch v thoi: Bao gm dich v thoi thng thng giao tip vi cc thu bao trong mng PSTN, ISDN, PLMN, cuc gi khn cp v cuc gi khn cp cho cc dch v c bit.

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Cc cuc gi c th c chia lm cuc gi do MS khi to (MOC), cuc gi ti MS (MTC) v cuc gi mobile-to-mobile (MMC) ph thuc vo vai tr ca MS trong cuc gi.

+ MOC:

Qu trnh x l ca VMSC i vi MOC bao gm:

MOC intiation: c khi to bng yu cu dch v t MS n VMSC thng qua RAN, da trn yu cu th MOC intiation x l cc dch v sau:

- Cuc gi thoi v d liu - Cuc gi khn cp - Cc ch th iu khin ca thu bao - SMS

Ngoi ra n cn h tr cc chc nng:

- Nhn thc - M ha/Gii m - Ch nh li TMSI - Thit lp cuc gi gia MS/UE v MSC server khch - Thit lp bearer cho thu bao ti bn gi

MOC completion: MSC kim tra tnh sn sng dch v v d liu ca thu bao, nu thnh cng kt ti c chp nhn, khi VMSC ch nh knh dch v v cho php tip tc cuc gi.

+ MTC: c sinh ra khi mt thu bao trong mng PSTN/ISDN/PLMN gi mt MS bng MSISDN. Qu trnh x l bao gm:

Truy vn thng tin nh tuyn: S dng chuyn cuc gi ti VMSC trong min roaming ca MS b gi.

Khi to v kt thc MTC: Sau khi c nh tuyn n VMSC/VLR, MSC/VLR kt ni cuc gi nu MSRN c VLR chp nhn.

+ MMC: L cuc gi gia 2 thu bao di ng. MCC c th c xem xt nh MOC kt hp MTC. MSC/VLR bn gi khi to v kt thc phin MOC. Bn MSC/VLR b gi khi to v kt thc phin MTC. Thng tin nh tuyn cng cn thit khi thc hin MMC.

Ngoi ra, MSOFTX3000 cn thc hin cc chc nng lin quan n dch v thoi nh:

+ Qun l dch v:

Chc nng qun l cho nh cung cp dch v: Nh cung cp c th cho php hoc hy dch v thng qua HLR, ty thuc vo cc thng tin ca thu bao

Chc nng qun l cho MS: Chc nng ny khng cn thit vi ngi dng

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+ Tnh cc v CDR:

Pht sinh CDR: Trong mi cuc gi, MSOFTX3000 thu thp d diu v to ra CRD, lu tr phc v vic tnh ha n. C th, iGWB thu thp, lu tr, sp xp v chuyn i cc CDR sinh ra bi MSOFTX3000.

CDR cho cuc gi pht sinh thng thng CDR cho cuc gi khn cp

- Dch v SMS: Cho php cc thu bao gi v nhn cc tin nhn thng qua trung tm SMS (SMC), bao gm text, hnh nh v m thanh. SMS c th c chia lm PTM SMS l cc SMS qung b cell (im a im) v PTP SMS (im im). PTP SMS ph bin hn, chia lm:

+ SM MT (Mobile-Terminated Short Message), l qu trnh SMC gi tin nhn n MS v MS gi bo co nhn thnh cng hoc tht bi ti SMC. + SM MO (Mobile-Originated Short Message), qu trnh MS gi tin nhn ti MS khc thng qua SMC v SMC gi bo co chuyn thnh cng hoc tht bi v MS. Chc nng chnh ca MSOFTX3000 trong dch v SMS l n kt ni trc tip ti SMC v thc hin: + Khi tin nhn gi t MS ti MSC thng qua RAN, MSC s chuyn tip ti SMC + Khi SM gi t SMC v MSC, MSC yu cu thng tin thu bao v nh tuyn t VLR v chuyn SM n MS thng qua RAN.

Tng t nh dch v thoi, MSOFTX3000 cng thc hin cc chc nng qun l dch v, tnh cc v pht sinh CDR i vi SMS

- Dch v chuyn tip cuc gi: Cho php chuyn tip cuc gi n MS ti bn th ba theo yu cu. Dch v ny c chia lm CFU, CFB, CFNRy v CFNRc. Bn th ba c th l thu bao trong PLMN, PSTN, ISDN hoc thm ch l mailbox.

MSOFTX3000 l MSC server, MGW v VLR cng thc hin dch v. MSOFTX3000 lm nhim v thc hin thng bo v nh tuyn iu khin chuyn tip cuc gi thng qua MGW.

- Dch v nh danh thu bao: y l dch v cho php hin th hoc khng hin th nh danh bn gi hoc bn b gi. N c chia lm CLIP, CLIR, COLP, COLR.

MSOFTX3000 thc hin kt ni v trao i thng tin cuc gi vi MS, GMSC server v HLR, qua gi thng tin cha nh danh thu bao ti MS, do vy c th thc hin thay i hin th s ca bn gi thng qua cc bc cu hnh.

- Dch v b sung cho cuc gi:

+ Cuc gi ch (Call waiting CW) gip thng tin cho thu bao v mt cuc gi ti trong cc trng hp nh: khng c knh dch v no ri hoc thu bao ang trong mt cuc gi khc.

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Khi mt thu bao B ang thc hin cuc gi, nu MSOFTX3000 nhn c cuc gi khc, n yu cu thng tin nu B h tr CW th s gi bn tin SETUP n MSC cha ch th CW, khi cuc gi n B t vo trng thi waiting v MSOFTX3000 sau s nhn bn tin ALERTING t MS ch th thi gian ch, tip theo c th hy cuc gi nu nhn c bn tin DISCONNECT hoc kt ni nu l CONNECT.

- Gi cuc gi (Call hold CH) cho php thu bao tm ngt cuc gi hin thi v thc hin ni li sai nu cn thit.

MSOFTX3000 thc hin Holding call thng qua cc bn tin HOLD, REJECT v ACKNOWLEDGE trao i vi MS, khi cuc gi t vo trng thi ch. Vic tip tc cuc gi c thc hin thng qua bn tin RETRIEVE, REJECT v bn tin ACKNOWLEDGE gia MSOFTX3000 v MS.

Ngoi cc dch v chnh m MSOFTX3000 cung cp, n cn tham gia vo nhiu dch v khc nh:

- Dch v gi a im - Dch v ODB - Dch v nhn thc - Dch v phn b MSRN - Dch v MNP

2.5.2.2. GMSC MSOFTX3000 h tr nhiu giao thc nh H.248, MAP, CAP, ISUP, v TUP. GMSC server l mt phn t nm gia min CS ca CN v mng bn ngoi. Vi GMSC server, mt mng di ng c th trao i bo hiu vi cc mng:

- PSTN - ISDN - Cc mng PLMN khc GMSC thc hin cc chc nng nh - Phc v nh mt trm gateway di ng gia cc mng - Phn tch nh tuyn - Thc hin sp xp v kt ni cuc gi gia cc mng

- Danh sch en v danh sch trng - Nhn thc cuc gi - Gim st cuc gi - Lu tr tp trung cc CDR

Khi trin khai vi UMG8900 Huawei, MSOFTX3000 c th hot ng nh GMSC trong mng.

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Hnh 2.11: MSOFTX3000 hot ng nh GMSC

MSOFTX3000 x l bo hiu (nh BICC) trn giao din Nc vi cc MSC khc, v bo hiu iu khin cuc gi ISUP/TUP vi mng truyn thng bn ngoi (PSTN/PLMN). N thc hin nh tuyn tm kim cho cc thu bao di ng b gi.

2.5.3. Mt s m hnh mng trin khai MSOFTX3000 hin nay

MSOFTX3000 h tr nhiu kiu m hnh mng sau y:

- Mobile IN Networking - Dual-Homing Networking - Multi-Area Networking - MSC Pool Networking, All IP Networking - CMN Networking, Networking with NGN - Networking with IMS - 2G/3G Combined Networking.

2.5.3.1. Mng kt hp 2G/3G

Nh ni trn, m hnh kt hp 2G/3G l m hnh hin nay ang c trin khai ph bin nht, c th truy nhp c BSS v UTRAN v cung cp dch v cho thu bao 2G v 3G ti cng thi im:

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Hnh 2.12: 2G/3G Combined Networking

c ch ra trong hnh trn, mng truy nhp 2G v mng truy nhp 3G kt ni ti MSC server. Mng kt hp 2G/3G c nhng u im sau:

- Ti nguyn 2G v 3G c chia s ng v mng c th c iu chnh linh ng. - Hiu sut mng v tri nghim ca ngi dng c tng cng, ti nguyn cho x l cp nht v tr v chuyn giao inter-MSC c gim, tc ng ca chuyn giao gia 2G v 3G ln tri nghim thu bao gim nh. - Yu cu cho cc thit b khc cng n gin, cu trc mng nhanh. nng cp server 2G MSC sn c ln server 3G MSC, nh cung cp ch cn thm thit b lin quan n giao din Iu t c yu cu bng thng. - Nh cung cp c th st nhp cc thu bao t mng 2G vo mng 3G mt cch xuyn sut khng cn phi thay i bng thng mng li, vi cc thu bao 2G v 3G chia s bng thng x l ca mng li.

2.5.3.2. Mng d phng

Trong cu trc mng ca 3GPP R4 hoc cao hn, MSC server qun l nhiu MGW v phc v mt vng rng. Nu MSC server cht hoc mt s c khn cp xy ra, MSC server mt quyn kim sot cc MGW m n qun l, v dch v c th b ngt trn din rng.

m bo hot ng an ton v tin cy ca mng di ng, MSOFTX3000 h tr tnh nng khc phc s c t xa MSC server. Ngha l mt MGW thuc v 2 MSC server. Thng thng, mt MGW ng k vi ch mt MSC server gi l active. Khi active MSC cht, MGW ny c th ng k vi standby MSC server v mng c th tip tc hot ng. MSOFTX3000 h tr cc kiu mng d phng sau:

+ Mng 1 + 1 backup

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Hnh 2.13: Backup 1+1

Thng thng MGW t 1 n 4 ng k v hot ng vi MSOFTX3000 A nhng khi A cht, cc MGW ny chuyn sang ng k v hot ng vi MSOFTX3000 B

+ Mng 1 + 1 cn bng ti

Hnh 2.14: 1 + 1 cn bng ti

MSOFTX3000 A qun l MGW 1 v 2 ti vng A v MSOFTX3000 B qun l vng B, khi c s c th cc MGW vng li s chuyn sang hot ng vi MSC kia.

Ngoi cc m hnh c bn trn, ta c th m rng thnh cc m hnh d phng ln hn nh:

+ Mng N + 1 backup + Mng N +1 cn bng ti +Networking Case

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2.6. Kt lun MSOFTX3000 c ng dng nh mt tng i chuyn mch mm ti lp iu khin ca mng li GSM v WCDMA. N cho php phi hp gia mng GSM v WCDMA. Vi cc tnh tng nh bng thng cao, hi t v tch hp nhiu chc nng a dng, h tr nhiu m hnh mng khc nhau, tin cy cao MSOFTX3000 ang c trin khai rng ri trong cc mng vin thng hin nay.

Do thi gian v iu kin khng cho php cng nh kh nng tm hiu cn c han, bi bo co thc tp ca em ch dng li mc gii thiu tng quan v chc nng cng nh cu trc chung ca MSOFTX3000, rt mong nhn c s gp ca thy.

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Ti liu tham kho

1. Huawei Technologies Co., Ltd - HUAWEI MSOFTX3000 Mobile Softswitch Center V100R005C10 : Feature Description

2. Huawei Technologies Co., Ltd - MSOFTX3000 Product Documentation

3. Internet.