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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100

CHNG 2

TM HIU CU TRC PHN CNG V C TNH K THUT CA BTS A9100

2.1. Khi qut v BTS Evolium A9100:

Evolium A9100 l BTS h GSM ca hng Acatel sn xut, n c thit k m bo cht lng phc v hon ho thng qua hiu sut v tuyn rt cao v bom s phc v rt nh, ng thi cng lm cho cc dng thay i tr nn d dnghn: m rng khu vc, thc hin cc chc nng quan trng trong tng lai. Ngoi ra,vic s dng v bo dng cng c quan tm c bit. Vic s dng cc modulehp nht cao v cc b phn cu thnh tin tin nht dn n nn v tin vy rtcao.

Hnh 2.1: Nhn t mt trc ca t BTS Evolium A91002.1.1 Cc im ni bt ca BTS Evolium A9100:

*K thut:

- nhy cao -111dBm ti BER = 10-3 (cao hn yu cu GSM).

- H tr a bng ( 850/900/1800/1900 Mhz).

- H tr c phn tp tn s v tuyn v anten.

- tin cy cao nh cu trc module.

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100- S dch chuyn phn mm c ti u ho nh dung lng ca trm gcEvolium A9100 c chy ti trc v cha ng thi hai b xoay o phnmm.

* linh hot cao:

- Kh nng m rng v phn vng rng c th c thc hin trong cng mt t,chng hn nh t MBO c th phc v n 6 sector bng tng dung lng 12TRX.

- Tnh iu bin ca t my ngoi tri cung cp linh hot cho cc thit b tchn (truyn dn, accu...).

- Cng vi t my v cu trc h thng i vi GSM850, GSM900, GSM1800 vGSM1900 trm gc Evolium A9100 bao gm c cc cu hnh hn hp (v dGSM900 v GSM1800 trong cng 1 t my).

- iu bin cao vi mt b module c thu nh v mt mt phn cch chung.

* D trin khai v can thip theo khu vc:

- Nguyn l m rng t my ngoi tri cho php lp t d dng.

- B t kim tra ton din.

- Khng gian cn thit cho vic bo dng nh nht nh vo ca pha trc.

2.1.2 Cc chc nng ca BTS Evolium A9100:

M ho ting ni:

Tc ton tc, tc bn tc v tc thch ng c h tr do phn mmBSS v cc thnh phn mng khc cng h tr cho qui tc m ho ny.

Cc di tn s:

Phn cng h tr cc bng tn GSM850, GSM900 m rng, GSM1800 vGSM1900:

Lin kt trn Lin kt diGSM 850 824 MHz - 849 MHz 869 MHz - 894 MHzE-GSM 1900 880 MHz - 915 MHz 925 MHz - 960 MHzGSM 1800 1710 MHz - 1785MHz 1805 MHz - 1880MHzGSM 1900 1850MHz - 1910 MHz 1930 MHz - 1990 MHz

Chc nng a tn:

Nh tnh linh hot o ca trm gc v tuyn A9100, TRX GSM 850 v GSM 1800

hoc TRX GSM 850 v GSM 1900 hoc TRX GSM 1900 v GSM 1800 c th cb tr trong cng mt t ch vi mt module n v trm SUM.

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100My thu BTS A9100:

c im thu ca bt k BTS no u ph thuc vo hai nhn t:

- nhy thc ca my thu ca trm.

- Hot ng thu ca trm trong nhng iu kin lan tuyn sng di ng c th.

Trong mi trng ni thnh ng c, s lan truyn sng v tuyn ch yu cquyt nh bi hiu ng ca nhiu ng tuyn v tc linh ng thc t ca cctrm di ng. Nhng iu kin khc nghit nht thch hp vi cc trm di ngchun.

nhy ca cc trm v tuyn A9100 BTS (ti cc b kt ni anten BTS) chon ton bo m l -111 DBm trong b iu bin GMSK.

Trong cc mi trng ni thnh ng c, cc yu cu v dung lng cao nn

thng dn n s la chn thc hin vic thay i tn s ti s dng tn s .Phn tp anten:

L mt c im tiu chun, cc cu hnh A9100 h tr s phn tp anten: 2anten trn mt sector.

Thay i tn s tng hp:

S thay i tn s tng hp (cn gi l s thay i tn s v tuyn) c h trbi ton b dy BTS, s dng tu chn. C hai ch thay i tn s:

- Ch thay i RF tiu chun: cell A c TRX N c th c TRX N-1 (tr TRXcha BCCH) tn s M (M thng ln hn N).

- Ch thay i bng tn gc gi RF: cell A c TRX N c th thay i ton bTRX N ca n tn s N.

ng b ho:

Cc ng h c th c:

- To ra trong mt ch hon ton chy khng bng mt my pht tn s bn

trong.

- ng b vi mt mc qui chiu ng h bn ngoi:

- ng ni A-bis (ng b PCM).

- Mt BTS khc, th h BTS trc c th c s dng.

- My thu GPS hp nht nh mt thit b t chn.

- S cung cp phn cng cho b ng b tn hiu bng tn trong A-bis, do khng phi hiu chnh ca my pht tn s bn trong.

Truyn dn:

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Hai mt giao tip A-bis vt l cho php mt s kt ni linh hot cc trm gc v

tuyn vi BSC trong cc cu hnh sao, cu hnh vng lp... c nhn dng theo cctiu chun ITU-T G703/G.704. Trong trng hp d liu u vo cao hn (hn2Mbit/s) l cn thit vi mt giao tip , c hai mt giao tip A-bis c th c cuhnh nh mt u vo d liu ca BTS.

Hn na Alcatel h tr s suy gim tn hiu trn A-bis n 36dB, cho php cctrm gc c th kt ni c vi nhng khong cch gia tng m khng cn bt ctrm lp no. Trong trng hp BTS b mt ngun, kt ni A-bis khng b gin oni vi cc BTS k tip (ch vng lp).

i vi tr khng ca trm cui A-bis, c hai mc chun: 75 hoc 120. Tutheo vng ni lp t trm hoc ngi vn hnh, tr khng trm cui A-bis c thdng mt trong hai ch s ny. A9100 chp nhn c hai ch s . Trong qu trnhchuyn i, n c cu hnh ti ch theo ch s m ngi vn hnh iu khin.

A9100 h tr b ghp tn hiu tnh A-bis v ti y cc ng tn hiu v tuyn(Radio signal line: RSL) ca 4 TRX c phn chia trn mt knh PCM 64Kbit/s.V vy c bit c th kt ni mt cu hnh 3x4 TRX vi ch mt PCM (cn n 28khe thi gian) nu c kt ni vi cc thit b BSS khc.

BTS ny cng h tr b phn chia tn hiu thng k. S ghp thng k trn mtknh 64kbit/s cho php s dng 1 n 4 RSL v OML trn cng mt khe thi gian64Kbit/s. iu tit kim khe thi gian trn ng A-bis.

Chn hn nh 1 BTS c 4 TRX s mt 9 khe thi gian v mt BTS c 2 TRX chmt 5 khe thi gian.

S hp nht Vibas:

Cc lung vibas c kh nng cung cp lung 2Mbit/s kt ni vi cc BTS khc.

Cc thit b viba gm c hai phn:

- Mt phn v tuyn gm anten v b thu pht c kt hp. Phn ny ch clp t ti outdoor m phi c anten v v th cn c gi l Outdoor Unit

(ODU).

- Mt phn bng tn gc m nhn qu trnh x l bng tn gc km theo nhngchc nng chung khc. Phn th hai ny cng c thit k lp t Indoor vdo cn c gi l Indoor Unit (IDU).

Cc BTS outdoor A9100 cung cp khng gian (n 3U trong t CBO, n 5Utrong MBO1, hoc phn tri ca MBO2, n 7U trong phn m rng ca MBO2) hp nht nhiu IDU, cho yu cu v v tr ca Mt BTS. Khi cc IDU c hpnht trong BTS, mt DDF phi c s dng cho cc im kt ni gia hai lung2Mbit/s xut pht t lung v tuyn v cc port 2Mbit/s trn board mch SUMA

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100hoc gia hai lung 2Mbit/s c th hon chuyn n gin t lung v tuyn ny nlung v tuyn khc.

S lng IDU chnh xc c th c s dng da trn nhng c im c canhng IDU ny v c th da trn vic s dng cc thit b t chn khc (v d: ccn v phn phi ngun ca TMA) c th s dng nhng ngun ging nhau bn

trong BTS: vng 19 inches cho cc thit b t chn, cc b ni ngun, mc tiu tncng sut, mc tiu th cng sut...

Ni n viba, DDF c yu cu c chiu cao 3U (t nht mt DDF tiu chunc cung cp cho nhng ng truyn 120), cc IDU thng cao mi ci 1U.iu ny cho php nh mc s lng IDU ti a c th c s dng.

2.1.3 Cc thng s k thut ca BTS Evolium A9100:

- Cng sut pht: 47dB

- in p tiu th: 48VDC

- in p tiu th cho card ANC; TRE: 5VDC

- in p tiu th cho card SUM: 48VDC

- Dng in nng tiu th: 30A

- C th s dng cu hnh: 3-4-4 hoc 2-2-2

2.2Cu trc module ca Evolium A9100:

2.2.1 Cu trc module tng th:

Trm gc v tuyn Evolium A9100 da vo cu trc module 3 cp , bao gm:

- Kt ni anten.

- Thu pht.

- Chc nng iu khin trm gc.

Nh mt b module hp nht cao thu nh c pht trin

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Hnh 2.2: Cu trc trm gc v tuyn A9100

2.2.2 Kt ni anten:

L trung gian kt ni tn hiu RF gia cp TRX v anten. Kt ni 4 tn hiuTRX v a ti 2 anten. i vi nhng cu hnh c dung lng ln hn, mt giai

on kt ni c th c b sung. Nh tnh linh hot ca ANc v cu to moduleny, cp kt ni anten c th c iu chnh ph hp vi yu cu (gim suyhao, ti thiu ho s lng anten ...).

Nhng chc nng chung c thc hin cp ny l:

- Ghp ng truyn v ng nhn vi cc anten chung.

- Cung cp cc tn hiu nhn c t anten n my thu u trc, t cc tnhiu nhn c khuych i v phn phi cho cc my thu khc nhau (b khuchi ting n thp LNA, v chc nng phn chia cng sut).

- Cung cp s lc cho ng truyn v ng nhn.

- Kt hp nu cn thit cc tn hiu u ra ca nhng my pht khc nhau v ktni chng vi cc anten khc.

- Gim st h s sng ng ca anten.

2.2.2.a Module kt ni h thng anten (ANC):

Hnh 2.3: H thng kt ni mng anten ANc

ANc kt ni n 4 tn hiu truyn vi 2 anten v phn phi tn hiu nhn ct mi anten cho 4 my thu (i vi s thu bnh thng v thu phn tp). Moduleny bao gm 2 cu trc ging nhau, mi cu trc gm:

- Mt b anten song cng cho php 1 anten n c s dng pht v thu chai hng ln v xung do gim thiu c s lng anten..

- Mt my o h s sng ng chn lc tn s gim st feeder v anten.

- Mt b khuych i LNA khuych i tn hiu RF nhn c v cung cp ccch s VSWR thch hp, nn nhiu v tin cy cao.

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100- Hai mc phn chia tn hiu RF nhn c cho 2 hoc 4 u ra ring bit miu ra nhn c tn hiu t anten chuyn dng ca n v t anten th hai (phntp).

- Mt b kt ni di tn s rng (WBC) tp trung hai ng truyn thnh mt, chdnh cho 2 cu hnh vi hn hai TRX. Mi sector c trang b t nht mt giai

on nh th dn n s thu nhy rt cao, tn hao thp v sn phm c s iubin tng h rt nh.

2.2.2.b Module kt ni h thng anten bi-TRX (ANb):

Hnh 2.4: H thng kt ni mng anten ANb

ANb kt ni n 2 tn hiu truyn vi 2 anten v phn phi tn hiu nhn ct mi anten cho 2 my thu (i vi s thu bnh thng v thu phn tp). Module

ny bao gm 2 cu trc ging nhau, mi cu trc gm:- Mt b anten song cng cho php 1 anten n c s dng pht v thu chai hng ln v xung do gim thiu c s lng anten.

- Mt my o h s sng ng chn lc tn s gim st Feeder v anten.

- Mt b khuych i LNA khuych i tn hiu RF nhn c v cung cp ccch s VSWR thch hp, nn nhiu v tin cy cao.

- Mt mc phn chia tn hiu RF nhn c n 2 u ra mi u ra nhn

c tn hiu t anten chuyn dng ca n v t anten th hai (phn tp).V ANb c gii hn cho hai TRX (MP hoc HP) n thch ng vi tt c cc

trng hp m s lng TRX c ni vi mt h thng anten khng ln hnhai, bao gm nhng trng hp sau:

- Cu hnh CBO.

- Cu hnh hao ph thp khng hn 4 TRX trn mt khu vc (v d MBO 3x4 LL,MBI 3x4 LL).

- Cu hnh a tn s c 3 sector trong mi di tn s.2.2.2.c Module kt ni di tn s rng sng i (ANy):

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Hnh 2.5: Module kt ni di tn rng ANy

ANy kt ni 4 my pht thnh 2 u ra v phn phi 2 tn hiu nhn c vi 4my thu. Module ny gm 2 cu trc tng t, mi cu trc gm:

- Mt b kt ni di tn s rng (WBC) tp trung hai my pht thnh mt.

- Hai b phn chia, mi b phn phi tn hiu nhn c n hai u ra ring bitcung cp ng phn tp v khng phn tp.

- K thut kt ni di tn s rng sng i c s dng v n trnh iu hngs c v ng tin cy hn so vi cc hc cng hng c th iu hng c t

xa. Ngoi ra n cn kt hp c vi c tnh phn x tn s tng hp (SFH).

Antenna network CombiningANc

Twin Combiner StageANy

Twin Combiner StageANy

TRXs TRXs

Atennas

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Hnh 2.6: Cu hnh 1x8 TRX

i vi nhng cu hnh tiu chun, mi sector c ni vi hai anten (hoc mtanten phn cc ngang) module ANy ch cn thit i vi nhng sector c 5 hoc hn5 TRX.

2.2.3 Cp my thu pht(TRE):TRX cp n cc chc nng GSM850, GSM900, GSM1800 v GSM1900

bao gm: phn tp anten, phn x tn s v tuyn (phn x tng hp) v cc thutton m ho khc nhau. i vi mi di tn s, nhng chc nng ny c hpnht thnh mt module n.

Bn trong mi module TRX, mt vng RF c thc hin. Vic kim tra vnglp c thc hin sau khi ti cc tn s n BTS nh mt phn b sung cho vict kim tra. Module TRX cng iu khin qu trnh ni tn hiu sng v tuyn

(RSL).2.2.4 Cp chc nng iu khin trm gc (BCF):

Cp ny c bo m bi module n v trm (SUM) l n v trung tmca BTS. Ch c mt module nh th trn mt BTS, cho d s sector v TRX l

bao nhiu chc nng iu khin chung ny ca SUM c gi l Phn chia nv trm.

Cc chc nng iu khin trm gc ch yu c thc hin nh sau:

- To ng h cho tt c cc module BTS khc, ng h ny c th ng b chott c ng h bn trong.

- ng dng vn hnh bo dng trung tm BTS.

- X l ng truyn A-bis.

- iu khin chc nng chuyn i AC/DC.

- iu khin ngun accu (dung lng, in p, nhit ).

2.3 Cc nguyn l v giao din v c hc ca cc module BTS A9100:

2.3.1 Cc nguyn l chnh: tiu chun ho v lp rp.

Cc panel pha sau ca tt c cc subrack u ging ht nhau. Mt giao dinchung cho tt c cc module c xc nh. Khng c v tr chuyn dng nodnh cho trn cc panel pha sau dnh cho mi module c phn b trc.

V tr bn trong BTS cc module b chi phi bi cc qui nh c hc, vic lp tcp d dng mt trc s lm ti u ho s tn nhit, vic lp rp tho d v mrng ti ch d dng.

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Tt c cc module hot ng u c thit b ngun hp nht ring. Mi module

gc h tr cho s m rng v tho tch thit b trc tip. V vy khng ngt qungdch v trong qu trnh bo dng.

Mt vng kt ni c sn trn phn nh ca t Indoor nhm lin kt vi tt c cckt ni bn ngoi vi BTS (A-bis, ngun, cnh bo ngoi ...).

Cc BTS c thit k theo cch ni trn lm cho vic tho ri v lp t s dngli tr nn d dng. Tt c cc module c c nh trong cc subrack bng cc khovn m c th sit cht hoc ni lng rt nhanh khng cn dng c chuyn dng.

chng rung lc mnh, mt s module c trng lng ln c c nh thmbng c vt.

2.3.2 Cc u im chnh:

Cc u im nh cu trc v cc nguyn l c hc c chn lc l:

- ANc c th c thay i d dng ti ch gia ch kt ni v ch khngkt ni.

- C th b sung TRX hoc thm ch cc sector ti v tr vn hnh. iu ny cth d dng thc hin trong thi gian can thip v ngng vn hnh nu cc thit banten song cng cn thit c trang b trc.

- Vic la chn mt dng t BTS ch ph thuc vo s lng TRX ti a s ccung cp trong tng lai. N khng lin quan vi vic sp xp cc BTS, chng

hn nh cu hnh tng trn sector, s lng anten hoc TRX trn mt sector.

- D a vo s dng v qun l nhiu cu hnh khc nhau.

- Cha ch trng pht trin trong tng lai.

2.4 Cc loi Subrack dng trong BTS A9100:

C 4 loi subrack c bn thng c s dng trong Evolium A9100:

- STASR (Standard Communications Subrack).

- SRACDC (AC/DC Subrack Outdoor).

- ACSR (AC Subrack for PM11).

- ASIB (AC/DC Subrack Individual Battery).

2.4.1 Subrack STASR:

STASR l subrack thng tin chun ho dnh cho tt c nhng BTS A9100. Ssubrack c dng v nhng loi module gn vo vi subrack l cu hnh phthuc. Mi module gn vo STASR s c mt s duy nht nhn bit v tr btr vi t. Thng tin v s l:

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100- S subrack: l m gn trn cp ribbon kt ni ni b trong subrack.

- Khe v tr subrack: l m board lng ca subrack.

Hnh 2.7: Subrack STASR vi ngn trng

Cc module c th gn vo STASR nh:

- TRE (Tranceiver Equipment)

- SUMA/SUMP (Station Unit Module Advanced/ Station Unit Module PCM)

- Cc module mng anten (ANc, ANx, ANy)- Thit b cung cp ngun (ADAM, ADAM4, PM12), cc module viba.

Subrack STASR c mt Board lng kt ni ni b, n cung cp ngun v tn hiugiao tip cho cc module. Board lng c 9 connector cm cc module v 3 chocc FANU. Mt connector cp subrack ni b trn board lng cung cp cho cuhnh a subrack.

Hnh 2 8: Nhn t pha sau ca subrack STASR

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A91002.4.2 Subrack SRACDC:

SRACDC l subrack ngun dng cho tt c cc cu hnh outdoor ca BTSA9100 vi module h tr ngun l PM08. N bao gm cc module gn thm vo chuyn i ngun AC sang ngun 48 VDC. Cc module gn thm vo l cc nh trong nhng khe cm xc nh trc trong subrack.

Hnh 2.9: Nhn t pha trc ca subrack SRACDC

Cc module c trong SRACDC nh:

- ACIB (AC Interface Box)

- ACRI (AC Remote Inventory)

- BACO (AC Connection Box)- BCU1(Battery Connection Box 1)

- FANU (Fan Unit)

v c th gn n 5 PM08.

Hnh 2.10: V tr cc module ca subrack SRACDC

PM08/5 PM08/4 PM08/3 PM08/2 PM08/1 BCU1

ACIBACRIBACO

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100SRACDC c mt Board lng c th cung cp ngun v giao tip bo hiu cho cc

module. Board lng bao gm 9 connector dnh cho cc module gn vo v 3 cho FANU.

Hnh 2.11: Nhn t pha sau ca subrack STASR2.4.3 Subrack ACSR:

Hnh 2.12: Nhn t pha trc ca subrack ACSR

ACSR l subrack ngun dng cho tt c cc cu hnh outdoor ca BTS A9100vi module h tr ngun l PM11. N bao gm cc module gn thm vo chuyn i ngun AC sang ngun 48 VDC. Cc module gn thm vo l c c

nh trong nhng khe cm xc nh trc trong subrack.

Nhng module c trong ACSR nh:

- BAC2 (Battery Connection Box 2)

- BCU1(Battery Connection Box 1)

- FANU (Fan Unit)

v c th gn thm vo n 4 PM11.

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Hnh 2.13: V tr cc module ca subrack ACSR

ACSR c mt board lng c th cung cp ngun v giao tip bo hiu cho ccmodule. Board lng bao gm 6 connector dnh cho cc module gn vo v 2 choFANU.

Hnh 2.14: Nhn t pha sau ca subrack ACSR

2.4.4 Subrack ASIB:

ASIB l subrack ngun dng cho tt c cc cu hnh indoor ca BTS A9100ly ngun t ngun AC chnh. N bao gm cc module gn thm vo chuyni ngun AC sang ngun 48 VDC. Cc module gn thm vo l c c nhtrong nhng khe cm xc nh trc trong subrack.

BAC2 PM11/4 PM11/3 PM11/2 PM11/1 PM11/1

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Hnh 2.15: Nhn t pha trc ca subrack ASIB

ASIB c mt Board lng c th cung cp ngun v giao tip bo hiu cho ccmodule. Board lng bao gm 9 connector dnh cho cc module gn vo v 3 choFANU.

Hnh 2.16: Nhn t pha sau ca subrack ASIB

Cc module c trong ASIB nh:

- ABAC (AC Indoor Battery control Unit)

- ACRI (AC Interface Box)

- APDO (AC Indoor Power Distribution Panel)

- BCU1 (Battery Control Unit 1)

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100- FANU (Fan Unit)

Hnh 2.17: V tr cc module ca subrack ASIB

2.5 Thit b Thu pht (TRE):

Hnh 2.18: Cu trc c bn ca TRETRE thc hin cc chc nng giao tip s bng tng c s n module SUMA

v chc nng giao tip tng t RF n module ANC. TRE kt hp c bn hai chcnng analog v digital trong cng mt module. Cu trc ca TRE c chia lm bakhi chc nng chnh nh sau:

- Digital part TRED.

- Analog part TREA vi nhng b khuych i ngun TEPAxx hocTREPAxx.

- Ngun h tr TREP hoc TRESH.

PM08/5 PM08/4 PM08/3 PM08/2 PM08/1 BCU1

ACRIAPDOABAC

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Hnh 2.19 Nhn t pha trc ca TRE

* Cc ch th LED ca TRE:

n LED Mu sc Tnh trng M tRSL Vng Trng thi kt ni ca RSL

Sng ng truyn kt niNhp nhy ang kt ni ng truynTt ng truyn khng kt ni

TX Vng Trng thi truyn dn (Khng c BCCH)Sng ang pht trn SBCCH, CBCH hoc

TCHNhp nhy ang khi to

Tt Khng pht cOP Vng Trng thi hot ng ca TRE

Sng Hot ng ttNhp nhy ang khi toTt Khng hot ng

BCCH Vng Trng thi truyn dn ca BCCHSng ang pht tn hiuTt Khng pht c

FAULT Hin trng cnh bo

Sng Mt cnh boNhp nhy ang mt cnh boTt Khng cnh bo

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A91005V Power Xanh Hin trng ca cp ngun +5V

Sng Hin ti cp ngun +5V3.3V Power Xanh Hin trng ang cp ngun +3.3V

Sng Hin ti cp ngun +3.3VTt Hin khng cp ngun +3.3V

PWR Xanh Hin trng ang cp ngun +3.3V

Sng Hin ti c in p raTt in p ra b hng

Bng 2.1: Cc ch th n LED ca module TWE

* Kt ni ca TRE:

Kt ni M t

Test Giao tip n TRE kim tra

TX Cp giao tip truyn dn RF n module AN

RX0, RX1 Cp giao tip 2 sng thu RF n module AN

Bng 2.2: Cc kt ni ca module TRE

2.6 Module SUMA/SUMP:

SUMA/SUMP l trung tm iu khin vn hnh v bo dng ca tt c cc BTSA9100. N m trch cc chc nng sau: truyn dn s; to xung ng h v nh

thi; vn hnh v bo dng; iu khin b chuyn i AC/DC v kim tra ngunaccu.

Hnh 2.20: Cc khi chc nng ca SUMA/SUMP

*Cu trc truyn dn v nh thi xung clock:

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Hnh 2.21: Cu trc truyn dn nh thi xung clock ca SUMA/SUMP

- Giao tip Abis:

+ RLS: mang cc d liu bo hiu v cc chc nng giao tip.+ Q1 link: mang cac d liu qun l truyn dn.

- iu khin truyn dn v xung clock SUMA/SUMP.

- To xung ni b cho TRE, AN (CGU).

- o c cnh bo v truyn thng tin qun l.

* Cu trc vn hnh v bo dng:

- Khi ng BTS A9100.- Cu hnh cho BTS di s iu khin ca BSC.

- Chu trch nhim cc lnh bo dng, trng thi h hng ca BTS.

- Cung cp cc bn tin v hot ng v trng thi ca cc module.

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H nh 2.22: Nhn t pha trc ca SUMA/SUMP

Cc ch th n LED ca module SUMA/SUMP:

n LED Musc

Tnh trng M t SUMA SUMP

OML Vng Trng thi ca OML x xOn ng truyn kt ni

Nhp nhy ang kt ni ng truynOff ng truyn khng kt niABIS1 Vng Trng thi ca Abis 1 dng

cho truyn dn v to xungclock

x x

On Abis 1 dng cNhp nhy Hng vic d tm trn Abis1Off Khng c cu hnh hoc

khng s sngO&M Vng Trng thi ca OML cho khi

OMU

x x

On ang hot ng

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Nhp nhy ang trng thi tm thi

trc khi tm trng thi hotng

Off Khng s dngABIS2 Vng Hin trng ca Abis 2 dng

cho truyn dn v to xung

clock

x x

On Abis 2 dng cNhp nhy Hng vic d tm trn Abis 2Off Khng s dng

OMU(SUMP) Hin trng cnh bo OMU x xFAULT(SUMA) Vng Hin trng cnh bo pht tn

hiu v xung ng hx x

On Cnh bo khng cNhp nhy ang mt cnh boOff Khng cnh bo

Trans FAULT Vng Trng thi cnh bo truyndn v xung ng h

x x

On Cnh bo khng cNhp nhy ang mt cnh boOff Khng cnh bo

PS1(SUMP) Vng Trng thi ca b chuyn i 1 x x

On B chuyn i 1 ang dngOff B chuyn i 1 b hng

PS2(SUMP) Vng Trng thi ca b chuyn i 2 x x

On B chuyn i 2 ang dngOff B chuyn i 2 b hng

ABIS 3 Vng Trng thi ca Abis 3 dngcho truyn dn v to xungclock

x x

On Abis 3 dng cNhp nhy Hng vic d tm trn Abis 3Off Khng c cu hnh hoc

khng s sngABIS 4 Vng Trng thi ca Abis 4 dng

cho truyn dn v to xungclock

x x

On Abis 4 dng cNhp nhy Hng vic d tm trn Abis 4Off Khng c cu hnh hoc

khng s sng

Bng 2.3: Cc ch th n LED ca module SUMA/SUMP

* Cc kt ni ca SUMA/SUMP

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Kt ni Loi M t

Abis1/2 9-Pin Sub D famale Cung cp 2 giao tip Abis. B kt nic th dng cp c tr khng 75 v120

Abis3/4 9-Pin Sub D famale Cung cp 2 giao tip Abis trn boardSUMA piggy back. B kt ni c th

dng cp c tr khng 75 v 120 BTS ConnectionArea

37-Pin Sub Dfamale

Cung cp cc giao tip s:- XBCB- XRT- GXPS- CLK 1- iu khin tr Abis

Test 9-Pin Sub D male Cung cp truy cp t xa n OMU vb x l truyn dn v nh thi.

BTS Terminal 9-Pin Sub D female Kt ni n my tnh trong trng hpdng serial 2.4. N c th dng cho bodng ni b v cu hnh h thng.

BTS Terminal USB Port Kt ni n my tnh trong trng hpdng serial tc cao. N c th dngcho bo dng ni b v cu hnh hthng.

Bng 2.4: Cc kt ni ca module SUMA/SUMP

2.7 Module Antenna Network Combine (ANC):

Hnh 2.23: Cu trc c bn ca ANC

Nhim v chnh ca n l:

- ANC l trung gian kt ni tn hiu RF gia cc TRE v anten. Kt ni 4 tn hiupht v a ti 2 anten.

- Cp tn hiu thu c t anten ti h thng v tuyn khuych i v phnphi cho 8 b thu.

- Cho php ng thi thu v pht trn h thng anten.- Lc tn hiu thu pht

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100- Gim st sng di trn h thng anten.

Trn ng downlink ANC kt ni hai TRX pht n hai anten. Trn nguplink th n chia tn hiu thu c v a chng n TRX thu.

ANC c 4 b kt ni ng vo ca tn hiu pht v 8 b kt ni ca tn hiu thu

nh hnh sau. V vy mt module ANC c th giao tip c vi 4 module TRX hochai module ANY nu c s dng.

Hnh 2.24:Nhn t pha trc ca ANC

* Cc ch th LED ca ANC:

n LED Musc

Tnh trng M t

VSWRA Vng Hin trng VSWR ca antena 2Sng VSWR tt

Nhp nhy chm t mc ngng thpNhp nhy nhanh t mc ngng cao

Tt VSWR khng c gim stVSWRB Vng Hin trng VSWR ca antena 1Sng VSWR tt

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Nhp nhy chm t mc ngng thpNhp nhy nhanh t mc ngng caoTt VSWR khng c gim st

O&M Vng/ Trng thi ca O&MSng vng O&M ang hot ngSng Khng s dng c

Tt ANC khng hot ngALARM Vng/ Hin trng cnh bo

Sng vng Hot ng bnh thng (FS/SW ang hotng, hin ti khng cnh bo, modulec cp ngun)

Nhp nhy Hin ti ang mt cnh boTt Khng c ngun hoc LED b hngSng Mt cnh bo cho module

Bng 2.4: Cc ch th n LED ca module ANC

* Cc kt ni ca ANC:

Kt ni M tTXAIN, TXAOUT Cung cp 2 tn hiu pht RF c kt hp vi b

trn ca nhnh ATXBIN, TXBOUT Cung cp 2 tn hiu pht RF c kt hp vi b

trn ca nhnh BRX0AOUT1,RX1AOUT1

Cung cp giao tip sng thu RF gia anten A v bthu TRE th nht

RX0AOUT2,

RX1AOUT2Cung cp giao tip sng thu RF gia anten A v bthu TRE th hai

RX0BOUT1,RX1BOUT1

Cung cp giao tip sng thu RF gia anten A v bthu TRE th ba

RX0BOUT2,RX1BOUT2

Cung cp giao tip sng thu RF gia anten A v bthu TRE th t

ANTA; ANTB Cung cp giao tip RF n/i ca 2 anten A v BANTB Kt ni tn hiu RF n anten BTXAIN1, TXAIN2TXBIN1, TXBIN2

Kt ni tn hiu pht RF cho 4 module TRE

Bng 2.5: Cc kt ni ca module ANC

2.8 M t t MBI5:

T indoor: MBI5 c 5 subrack. T ny c th c thit k theo kiu back-to-back hoc back-to-wall.

T ny khng c ca hng nn ch c th thy phn bn trong t pha trc (tt ccc dy dn cng ch i vo t pha trc). Nhng bt buc khong cch duy nht:

- Khong h pha trc 1m ( ca v cc kt ni).- Khong h bn hng pha nh 0 3m (cc kt ni)

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100T ny thng khng c c nh trn nn nh m c c nh trn nhng sn

bng phng. Nu khng cng c th lp t trn nn nh.

Hnh 2.25: M t Indoor MBI5

MBI5 l t my c lp v th t MBI3 khng th m rng sangt MBI5 c.

MBI5 c 12 b kt ni anten cho php kt ni n 6 sector.B phn ngun DC ca Indoor MBI5 c thit k vn hnh bng in p DC

(0/-48V n 0/-60V +/-20%). V th cc thit b ngun phi cung cp dng in thchhp nh thit b cp ngun c rectifier v accu hoc nng lng mt tri.

B phn ngun AC ca t ny c thit k vn hnh trc tip t ngun chnhAC (230 VAC). Gii php ny trnh c vic s dng mt thit b cp ngun nhmtit kim chi ph v khng gian phng.

Trong trng hp cn backup, c th la chn gia 3 loi accu tu theo thi gianbackup qui nh.

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Chng 2:Tm hiu cu trc phn cng v c tnh k thut ca BTS A9100Ch c th dng 1 accu 90Ah trong BTS vi b phn xoay o thch hp ca t

MBI5 vi subrack bn di chuyn dng cho accu ny, cc accu cn li c th dngc cho MBI3 v MBI5 trong b phn xoay o tiu chun, chng hn nh khng csubrack chuyn dng cho accu bn trong t.

MBI5 cho php cha cc module cp ngun vi 48VDC ti a 500W.

* T chc sp xp cc Module v Subrack trong MBI5 :

Hnh 2.26: T chc sp xp module v subrack

Nhng qui nh sau p dng cho vic nh v cc module khc nhau:

- ti u ho s to nhit cng nh vic ni cp RF, mt subrack thng thngc trang b ch vi TRX hoc vi mt SUM v/hoc vi module anten song

cng.

- Cc subrack c lp t mt cch c la chn nh sau: subrack bn dic lp TRX, subrack tip theo c lp SUM, module anten song cng v cnh th.

- Mt subrack c th cha n 4 TRX cc TRX ca mt sector c sn c lpt t thp n cao v t phi sang tri.

- y mi subrack cha TRX c mt ngn qut cha 6 qut, tc qut c

iu khin bi SUM ty theo nhit bn trong BTS.

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CHNG 3: QUY TRNH VN HNH, BO DNG V X L S C BTS

CHNG 3: QUY TRNH VN HNH, BO DNG V XL S C BTS

3.1 Vn hnh website iu hnh thng tin:

Yu cu i vi my trm c cu hnh phn cng:

- Processor: Core 2 Duo E8400 3.0Ghz- Memory 2GB

- Internal Hard Disk 160GB HDD Drive

- Card mng Ethernet 10/100 Mbps

Phn mm:

-OS: Window XP, 2000, Vita

- Java

Kt ni: ADSL, truy cp Website

Trnh duyt: IE, FireFox

a ch: http://dhtt.vinaphone.vn

a ch: http://dhtt.gpc.com.vn

User and Password: mi tnh c cp user/ password ring, c th thay ipassword

Menu h thng cho php: thot khi h thng, thay i mt khu, thot trnh

duyt.
http://dhtt.vinaphone.vn/http://dhtt.gpc.com.vn/http://dhtt.vinaphone.vn/http://dhtt.gpc.com.vn/

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-Menu danh mc: cho php xem r cu hnh ca trm v truyn dn lin quann trm

-Menu cnh bo: xem bo co chi tit cnh bo

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-Menu bo co: la chn loi bo co, la chn ngy, nhn nt xut bo co,la chn ni lu bo co

Cp nht qu trnh x l: kch p vo cnh bo cp nht qu trnh x l

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Nt chi tit:

3.2 Nhn lc v dng c bo dng:3.2.1 Nhn lc bo dng:

Nhn vin k thut in, my lnh :

-c o to chnh v thit b ngun, accu, chng st v in lnh. c b tc kinthc c bn v vin thng, l thuyt c bn v di ng, trm BTS mng Vinaphone.

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-Thc hin cng vic bo dng theo s phn cng ca ngi ph trch.-Thc hin cc cng vic bo dng thit b ngun, accu, thit b chng st, tip t,chiu sng, my lnh, h thng cnh bo ngoi (t nhp, nhit , bo khi, bo chy,...), thit b phng chng chy n...

Nhn vin ct cao :

-Phi c o to v cp chng ch ct cao, m bo sc kho trc khi thc hincc cng vic bo dng trn ct cao.-Thc hin cng vic bo dng theo s phn cng ca ngi ph trch.-m nhn chnh cc cng vic bo dng phn outdoor nh h thng ct anten, cucp, b g anten, anten v feeder, h thng tip t v chng st .....

3.2.2 Dng c bo dng:-My ht bi cm tay.-Gi lau, bn chi mm, cn cng nghip, m cng nghip ...

-Giy an ton cho ngi leo ct cao-Tua vt, c l, m lt, dy gt...-M hn v cc vt dng cn thit hn.-02 ng h vn nng (Chauvin arnoux CA 5220, HIOKI Digital Multimeter).-01 Ampe km ch th s/kim (KYORITSU 2003 Digital Clamp meter, KYORITSU237 Digital Clamp meter, KYORITSU 2608 Clamp meter, FLUKE 36 Clam Meter-My o in tr t ( KYORITSU 4105).-My o lung truyn dn 2Mbps (HP Prober 2, HP E7580A, PA 20, Sunset E10).

-My o cht lng Accu (Midtronics CTM-300).-B ti gi 200A DC vi cc bc tng dng 2,5 A v cp u ni ph hp thchin bo dng accu.-B my nn xch tay c dng ra 150A.-My b m hoc in thoi di ng-My o cao, la bn, thc o gc nghing-My o cng sut, test feeder (Site Master)-My pht tn hiu (cn chnh ng thu)-My qut sng (TEMS investigation)-My o nhit bng hng ngoi.-My n.-My nn kh kh.-My kim tra u connector quang.-Bnh ga np kh my lnh.-Dung dch NaC03 (5%).

3.2.3 Ni dung chun b:- Lp k hoch bo dng

- Cng tc thu thp s liu- Cng tc chun b phng tin, dng c

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3.2.3.1 Lp k hoch bo dng:-Lp k hoch bo dng nh k cc trm BTS (tuyn bo dng, danh sch trmBTS, lch trnh bo dng);-Chun b v phn cng nhn s cho bo dng;-Thng bo k hoch bo dng n cc n v lin quan gii quyt cc th tc cn

thit v phi hp thc hin bo dng.3.2.3.2 Cng tc thu thp s liu:

-Chun b y kt qu bo dng ln gn nht ca cc trm BTS trong danh schbo dng.-Thng k cc tn ti, cnh bo hin ang c cc trm BTS trong danh sch bodng.-Thng k cc trm BTS ln cn (km theo cc tham s v tuyn) c t ln bodng trc v mi a vo khai thc trong thi gian gn y ca mi trm BTS.

-Thng k phn nh ca khch hng v vng ph sng, cht lng dch v ca trmBTS trong thi gian 1 thng gn nht.

3.2.3.3 Cng tc chun b phng tin, dng c:-Chun b y cc dng c, phng tin ti thiu phc v cho cng tc bo dngtrm BTS theo quy nh.-Cn c vo s liu thu thp c trn chun b cc vt t d phng thay th theoyu cu c th ca tng trm BTS trong tuyn bo dng.-Cn c vo s nhn s, s lng dng c, vt t d phng cn thit chun b

phng tin t vi trng ti ph hp.3.2.4 Ni dung bo dng:-Quy trnh bo dng Outdoor-Quy trnh bo dng Indoor

3.2.4.1 Quy trnh bo dng outdoor bao gm:-Ct anten, cu cp, feeder.-H thng anten, b g anten.-H thng tip t, chng st.-Kim tra tnh trng ct anten t ng, nu anten dy co kim cng ca dy co, ccim ni dy co (bi m) m bo chc chn.-Kim tra chc chn ca cu cp, kim tra cc im tip t, dy nhy M50 ti ccim ni cu cp.-Kim ct anten, cu cp c b g hay khng, tin hnh sn chng g.-Kim tra kp cp m bo chc chn ca feeder (cch nhau 1m phi c mtthanh kp).-Kim tra cc khp ni feeder, xit cht cc u connector. Bc li bng keo, cao sunon.

-Kim tra un cong ca feeder ti cc im phi 25cm. Trc khi vo phng my,feeder phi c un cong v pha di nc ma khng chy vo phng.

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-Kim tra m bo im mt cao nht ca anten khng vt qu phm vi an ton 45 ca kim chng st.-Kim tra chc chn ca cc anten (c anten viba), b g anten.-Kim tra cao, hng v gc ngng, song song ca b mt cc anten trong mtsector, khong cch phn tp anten m bo ng theo thit k ca trm.

-Kim tra tnh trng kim thu li Franklin.-Kim tra cc im u ni dy t ca h thng thu li vi h thng t chung catrm.-Kim tra tnh trng tip t ca cu cp vi ct anten, kim tra cc dy nhy ti ccim ni cu cp.-Kim tra cc mi ni gia t t bo v v t cng tc m bo tip xc tt (nhsch g ri hn bng h quang hoc Axetylen v qut sn chng g).-Kim tra cc im tip t ca feeder t yu cu (t nht phi c 3 im : trc khi

vo trm, trc khi u vo anten, trc khi ri ct).-Kim tra cc dy tip t phi c d phng co dn 100mm v c un congxung pha di.-o kim tra in tr tip t ca h thng t.-Ghi li cc tn ti sau khi bo dng bo co.

3.2.4.2 Quy trnh bo dng indoor:-V sinh phng my, kim tra tng, trn nh, ca, kn l feeder.-Kim tra cc yu t xung quanh c th nh hng n phng my, kim tra h thng

thot nc trn trn nh (nu c).-Ghi li cc tn ti sau khi bo dng bo co.-V sinh cng nghip cc thit b t ngun DC, n p, UPS (nu c).-Kim tra v sinh, cc thit b in (h thng cu dao, dy dn, cng tc, cp in vh thng chiu sng).-Kim tra cc im tip xc m bo chc chn.-Kim tra tnh trng tip t cho v my ca tt c thit b in trong phng my (m

bo tt cc tip im gia v my - dy tip t bng tip t).-o in p pha, dng pha, in p dy trung tnh v t.-V sinh, bo dng b n p.-Kim tra h thng cnh bo ca t ngun DC, accu (cnh bo mt in li AC, hngRectifier, in p thp LVA, in p cao HVA, in p thp ct LVD...).-m bo rectifier ca t ngun (bt buc c d phng) v iu chnh cn ti giacc rectifier.-Ghi li cc tn ti sau khi bo dng bo co xin kin ca cp qun l cao hn.-V sinh cng nghip h thng accu, kim tra sn nh t accu.-Kim tra cc tip im (xit c, bi du m).

-Kim tra cht lng ( dn in) tng bnh accu.

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-Thc hin bi phng 30 pht (phng qua thit b i vi bo dng bo dng 3thng/ln) hoc 3 gi (phng qua ti gi i vi bo dng 6 thng/ln) kim tracng dng, in p ca tng bnh accu.-Kim tra nhit b mt ca accu vo nhng khong thi gian c nh trong sut qutrnh o. Nhng bnh c nhit b mt cao khc thng c th b li cn lu

kim tra k hn qua bc o kim sau y:-Nu in p bnh no tt xung di 1.75 VPC th phi np li accu v tin hnh li

bi o. Nu xy ra ln th 2 th c th kt lun bnh accu b hng cn phi cthay th ngay.-Phi m bo tt c cc bnh accu phi c np y trc khi ri khi trm.-Ghi li cc tn ti sau khi bo dng bo.

3.2.4.3 Bo dng thit b ph tr:-Ni dung bo dng 3 thng:

-V sinh tm lc khng kh.-V sinh dn lnh.-o in p v dng khi ng.-o in p v dng lm vic.-Kim tra p lc kh nn v np b xung cho iu ho.-Kim tra cc im u: u t, u cp AC, cm cht cc jack cm v lm sch cctip im.-Kim tra b cnh bo iu ho.

-Kim tra b cnh bo nhit .-Kim tra iu khin Remote ca iu ho.-Kim tra ch chuyn i d phng gia 2 iu ho (khi mt in AC v c inAC tr li).-Trc khi ri trm phi m bo iu ho chy tt ng ch (iu chnh ca shng gi 450 so vi mt phng ngang, nhit phng t 20 - 250C).-Kim tra kn ca phng my.-Ghi li cc tn ti sau khi bo dng bo.-Ni dung bo dng 6 thng:-Thc hin cc vic nh bo dng 3 thng v thm cc phn sau:-Lm sch dn ngng-Kim tra ng ng bo n-Thng ng thot nc-Kim tra qut gi-Lm v sinh dn nng-Kim tra c kh: n, cc ting ng bt thng, chc chn ca gi .-Trc khi ri trm phi m bo iu ho chy tt ng ch .

-Ghi li cc tn ti sau khi bo dng bo co.-Kim tra v sinh cc thit b ct lc st ngun, cht lng hot ng (%).

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-Kim tra cc tip im u ni thit b ct lc st.-Kim tra thit b chng st feeder, chng st truyn dn (trong trng hp c yu cutrang b).-Ghi li cc tn ti sau khi bo dng bo co.-Kim tra v sinh cc thit b cnh bo ngoi (t nhp, nhit , iu ho, bo nhit,

bo chy, thit b cnh bo trung tm...)-Tin hnh th cc cnh bo ngoi, bo nhit, bo chy trang b m bo t yu cu.-Ghi li cc tn ti sau khi bo dng bo co.-V sinh bnh cu ho.-Kim tra kp ch nim phong cc bnh cu ho.-Kim tra trng lng C02 ca cc bnh cu ho.-Kim tra tiu lnh cha chy.-Ghi li cc tn ti sau khi bo dng bo co.

-Kim tra v v sinh cc thit b ph tr khc (ni quy phng my, s ng in,cu hnh truyn dn, mc treo cha kho, hp cnh bo, s theo di ti sn, s nht

bin, bin bo phng my, qut thng gi...).-Ghi li cc tn ti sau khi bo dng bo co.

3.2.4.4 Bo dng thit b truyn dn Viba:-V sinh cng nghip thit b truyn dn Viba.-Kim tra trng thi cc n LED trn thit b nu thy c hin tng bt thng phikp thi x l.

-Kim tra n nh ca ngun DC cung cp cho thit b Viba.-Kim tra mc thu, mc pht, tn s ca tuyn Viba c t yu cu theo thit k.-Tin hnh o In-Service lung ang s dng trong 02 gi ng h.-Kim tra xo cc cnh bo trn thit b (cc lung E1 khng dng n phi c uloop trnh cnh bo).-Tin hnh o BER t nht 48 gi ng h (o out-off -service trn lung truyn dnE1 cn d ca tuyn truyn dn) tu thuc mc cn thit (thng xuyn mt linlc, cht lng qu km....).-Ghi li cc tn ti sau khi bo dng bo co.

3.2.4.5 Bo dng thit b trm BTS:-V sinh cng nghip thit b trm (b mt t, nc t, cc, qut gi, ...).-Kim tra v xit cht (bng cl, mlt) tt c cc u connector RF (khng c vn

bng tay khng) nhm trnh suy hao cng sut, phn x sng ng.-Kim tra thit b modul cung cp ngun ca t my (yu cu c d phng vmodul ngun).-Cn chnh, kim tra cng sut pht cc i ca tng TRX so vi tiu chun k thut,thc hin cn bng cng sut ca cc TRX trong cng sector. Yu cu thay th nu

cng sut pht cc i o c ti nh cabinet ca TRX vt qu ch tiu k thut,hoc nh hn 42.3 dBm (17W).

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-Cn chnh ng thu (bay level offset tables) ca tng DRI). Nu khng t yu cuphi thay th v thc hin cn chnh mi.-Kim tra lch ca ng h GCLK, tin hnh cn chnh ng h GCLK nu ccnh bo hoc ng h lch ra ngoi gi tr cho php.-Sp xp li theo th t ca cc RTF trn cc DRI trong mi sector.

-Kim tra kh nng thm nhp knh, cht lng thoi trn cc khi thu pht v tuyn.-Phi hp vi Trung tm iu hnh thng tin kim tra v x l cc cnh bo cn tnti ca trm trc khi kt thu cng vic bo dng.-Ghi li cc tn ti sau khi bo dng bo co.

3.2.4.6 Kim tra vng ph sng v cht lng dch v:-Thc hin driving test kim tra v nh gi cht lng dch v ca trm sau khi

bo dng, lu gi s liu driving test qun l v so snh vi kt qu cc ln bodng trc v sau.

-o kim tra vng ph sng theo cc im chun (la chn 10 im chun ngbin c mc thu khong 80 dBm ca mi sector o kim so snh vi ln bodng trc ).-Phi hp vi Trung tm HTT kim tra v khai bo y cc neighbor cells cnthiu, xo b cc neighbor cells khng cn thit.-Ly s liu thng k t OMC-R ca trm trong 5 ngy (t Th hai n Th su catun tip theo sau khi bo dng so snh vi 5 ngy cng thi im ca ln bodng trc ), c th cc s liu sau y:

Total_CallCall_Setup_Success_RateCall_Success_RateDrop_Call_RateHandover_Success_RateTCH_Congestion_Rate

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n v thc hin:. Cng ho X hi ch ngha Vit nam.................... c lp - T do - Hnh phc

------------o0o-----------

PHIU BO DNG TRM BTS

(nh k .......... thng/ ln )Tn trm: .......................................Loi trm: .....................................Cu hnh: ......................................

Ngy bo dng ......................................Ngi thc hin :1 ....(H v tn )........(Ph trch chung) K tn: .........2 ...............................

3 ...............................4.................................H THNG OUTDOOR- Antena:Loi anten: ................ Gain:............... S lng: .............

Antencao(m)

Gcngng()

Hng()

Phn tp(H/V)

K.cchphn tp(m)

B mtSongSong

(Ss/k0ss)

Ghi ch

Sector1

Tx1A/Rx1ATx1B/Rx1B....

Sector2


Sector3


Feeder:

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difeeder

H ssngng(yucu

< 1.33)

C.Sutp.x(Yu cu

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STT Ni dung bodng

Trc khi bodng

Sau khi bo dng Ghi ch

1 Hng dn Antenviba

2 Tnh trng b ganten, outdoor

3 Tnh trng feeder,connector (cong,dp, lng ...)

4 Tip t thit b,feeder

H thng tip t:

STT Ni dung cng vic Kt qu Ghi ch

1 in tr t ......( )2 Bng t trong ......( )3 Bng t ngoi ......( )4 Kim tra tip xc gia l tip t

Feeder vi thn ct(Tt) (Xu)

5 Kim tra tip xc gia l tip tFeeder bng t

6 Kim tra tip cc mi hn dy tvi kim thu st

7 Kim tra tip xc dy t vi bngt trong ngoi phng my

8 Kim tra tip t v BTS9 Kim tra tip t t Ngun10 Kim tra tip t t Accu11 Kim tra tip t iu ha12 Kim tra tip t chng st13 Kim tra tip t Protector-Feeder

Kim tra tieenp t Protector

Feeder

Thit b BTS:

STT Ni dungcng vic

Cc thng s o Ghi ch

1 Cn chnhGCLK (mtn)

Ngyc.chnhln cui

Tn sc.chnhln cui

Tn strc khicn chnh

Tn ssau khicn chnh

t /Khng t2 Cn chnh C.Sut C.S max C.S max

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c.sut phtTRXs/Cell

DRI trccal

DRI saucal

sau cnbng

sector1sector2sector3

3 Cn chnhng thuTRXs/Cell

Cnh bo Kt qusau khicn chnh

sector1 C/Khng

Tt/xu

sector2sector3

4Cc cnh

bo khc cathit b(Khng tnhcnh bongoi)

M t cnh bo1/

2/3/

3.3 X l s c:S iu hnh x l s c:

TRUNG TM HTT(OMC VinaPhone )

Group I :S c v CSHT

Group II :S c v T .b BSS

Trang WEB HTT

Internet

iu hnh VT tnh(OMC -TT)

OMC -Khu vc(VNP1,2,3)

ng cu CSHT Sa cha Tb ph

tr.

Xng SCTB : ng cu BTS Nng cp

IU HNH VIN THNG - VNPTKt ni mng LAN

Kt ni Internet

in thoi , email , F

BSS VNP 1,2,3

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Hnh 3.1: S iu hnh x l s c

3.3.1 S c c s h tng( CSHT):-S c CSHT gy nguy c mt lin lc BTS-S c CSHT lm mt lin lc BTSCnh bo nhit :

Khi nhit phng trn 30 s xut cnh bo v trang WEB iu hnh. Hin nay, docha u t c s h tng v cnh bo ngoi nn mt s BTS pht sng cha c cnh

bo trn.-nh hng: Gy chy trm, h accu, h thit b.

-Nguyn nhn gy cnh bo-My lnh hng hay yu ga th nhit phng cao dn n xut cnh bo-Cnh bo b hng.

Khc phc :-C nhn vin n trc tip BTS kim tra nhit phng my, nu ML tt th cth do phng cch nhit khng tt, cnh bo hng hay my lnh nhit cao ththng bo cho iu hnh vin thng tnh x l.-Thi gian x l 2h.

Cnh bo mt AC:-Cnh bo ny xy ra khi khng c ngun AC cung cp cho t nn.N h i l i

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-Nhy CB AC.-H cc module nn.-Board cnh bo ca t ngun h.

X l cnh bo mt AC:-Yu cu : khi nhn vin i x l s c ny th bt buc phi mang theo ng h o

in-C nhn vin n BTS, nu thc s mt AC th chy my n theo ng quy trnh (ch khi chy my n th ch nn cho chy 1 my nn, bypass chng st, tt my lnh ivi my n CS nh (5 KVA))-i vi trng hp nhy CB in lc thng xuyn th set-up li thng s ci t cat ngun. Hoc tt bt module nn. Kim tra li in p t ( trung tnh).

Nu nh trm khng mt AC :-Kim tra xem c mt pha in no khng.

-CB chng st c nhy hay khng.-H chng st (test bng cch bypass chng st AC).-Kim tra mn hnh cnh bo t ngun c cnh bo g hay khng (c th do hng

board iu khin t ngun, hng module ngun, nhy CB trong t ngun).Cnh bo in p thp:

- Cnh bo p thp i km vi cnh bo AC, cnh bo ny bo in p Accu 48.25 V, bo VNP2 x l v l cnh bo giNu < 48.25 V, kim tra in AC cha vo n t ngun th quay li bc kim traAC.

S c c s h tng gy mt lin lc BTS:-Theo thng k ca Vinaphone2, trn 90% nguyn nhn gy mt lin lc l do mt ACv do li truyn dn.-Khi cnh bo mt lin lc xut hin (OOS)-Kim tra xem trc c AC hay khng. Nu c th x l theo hng mt AC.-Khng cnh bo AC: in thoi hi ch nh BTS xem nh c mt in hay khnghay ng h in c chy hay khng (phng trng hp cnh bo AC hng khngxut).-Sau khi kim tra AC tt m BTS vn mt lin lc, c nhn vin k thut n trm

phi hp kim tra truyn dn.Yu cu ca nhn vin i x l truyn dn:

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-Cng c : bm Krone, led nh, laptop (nu kim tra truyn dn viba Pasolink)Cc thao tc khi x l truyn dn :

-Loop ng truyn v pha BSC ti v tr gn BSC nht kim tra (c th loop mm).Nu khng tt th kim tra cp nhy ti BSC. Nu vn khng tt bo Vinaphone2 xl.

-Nu loop tt, c nhn vin k thut n trm trc ht kim tra ngun DC ti BTS(m bo in p DC l trn 48,5V), nu ngun tt th loop cng ti BTS. Nu loop ttth lin h OMC x l tip. Nu loop khng tt th tp trung x l v truyn dn.

Mt lin lc, chy n do nc vo thit b:-Dt t trn nh.-Nc theo feeder vo.

Mt lin lc gy, ng tr anten:-Lm H anten feeder.

-H truyn dn Viba.-Ch nh i vng nn khng vo x l c.

Mt trm:-Mt trm: Mt trm dy in.-Mt trm dy thot st.-Mt iu ha.

3.3.2 Lu x l s c:

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Hnh 3.2: Lu x l s c-Vin thng tnh v Vinaphone ang cng khai thc mng Vinaphone.-Vin thng tnh qun l c s h tng.Vinaphone qun l thit b, cht lng dch v.-Cc tc ng ca Vin thng tnh ln c s h tng v tc ng ca Vinaphone lnthit b u s nh hng n mng Vinaphone.-Cn thng nht qui trnh v qun l cng vic-Cn c mt c s d liu thng nht.

KT LUNTrong qu trnh thc hin bo co thc tp tt nghip ny, thng qua vic tm

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mng internet gip ti hiu r c tng quan v mng thng tin di ng GSM,cu trc trm BTS ng thi tm hiu c thc t thit b Huawei BTS3900 tin v.

Cng vi kin thc hc ti s vn dng vo cng tc chuyn mn honthnh cng vic mt cch tt nht.

Tuy nhin do thi gian v kin thc cn hn ch nn vic nghin cu cha honthin, rt mong nhn c s quan tm v gp ca Qu Thy C - Hc Vin BuChnh Vin Thng cng cc bn sinh vin ti c hon chnh hn.

Em xin chn thnh cm n Thy gio Thc s Phm Thanh m tn tnhtruyn dy nhng kin thc qu bu v ht lng gip ti trong thi gian thc hin ti.

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T VIT TT

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Xu Ly Su Co BTS A9100

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