K thut Inbuilding-IBS (Inbuilding Solution)

1)IBS (Inbuilding Solution) l g?IBS l gii php thit k nng cao trong ta nh, ci thin cht lng ph sng di ng nhm duy tr n nh cuc gi ca nhng thu bao trong trong mi trng ta nh cao tng .

2)Cu trc ca mt IBSH thng inbuilding bao gm 3 phn chnh l: ngun tn hiu, h thng phn phi tn hiu v phn t bc x. Trong h thng phn phi tn hiu l im khc bit in hnh gia h thng inbuilding so vi h thng mng BTS outdoor macro thng thng.

a)Ngun tn hiu- ph sng cho inbuilding ta c th dng:Ngun tn hiu bng trm outdoor:y l gii php n gin nht cung cp vng ph cho cc to nh vi tn hiu t cc trm macro bn ngoi to nh. Gii php ny c khuyn ngh nu lu lng trong ta nh khng cao, hoc ch ta nh khng cho php lp t thit b v i cp trong ta nh hoc vic trin khai gii php dnh ring cho n khng kinh t. Khi vng ph c cung cp bng cch:- Tn hiu s thm nhp vo to nh t bn ngoi. iu ny ch thc hin c i vi cc ta nh c khong h ln i vi bn ngoi hoc t tng, ca s kim loi.- t BTS trn cc ta nh xung quanh v hng anten ti ta nh cn ph. Khi khng cn n h thng phn phi tn hiu na v phn t bc x chnh l anten ca trm BTS outdoor macro .u im ca gii php ny l chi ph thp, khng mt nhiu thi gian trong trin khai, c th ph c ngoi nh (outdoor) v trong nh (indoor). Nhc im ca gii php ny l vng ph hn ch, tc bit thp i vi cc dch v d liu, dung lng thp v cht lng khng th chp nhn c mt s phn trong to nh. Suy hao tng dn khi tn s cng cao, do vy kh cung cp vng ph cho to nh mc tn hiu tt. Suy hao c th khc phc bng cch tng cng sut t cc trm outdoor nhng nhiu s tng. Vic thit k tn s gp nhiu kh khn do qu tn s hn hp (nht l i vi cc nh khai thc chia s chung bng tn GSM).Ngoi cch ph sng inbuilding bng trm outdoor ta c th s dng trm lp (repeater) lm ngun v tuyn cung cp cho h thng phn phi. Khi vng ph ca trm outdoor hin c c m rng. Nhng gii php ny t c s dng trong thc t v cng tn hiu, cht lng, s n nh, dung lng ph thuc vo trm BTS donor v vic thit k cho trm lp (qu ng truyn, mc cch ly 2 hng) mc d gi thnh thp, trin khai nhanh, d dng.V c nhiu nhc im ni trn nn trn thc t rt t nh cung cp dch v di ng s dng gii php ny, tr trng hp bt kh khng.Ngun tn hiu bng trm indoor dnh ring:Gii php ny c th tng thm dung lng cho nhng vng indoor yu cu lu lng cao. Vn chnh y l cung cp dung lng yu cu trong khi vn m bo vng ph tt ca to nh m khng lm nh hng ti cht lng dch v ca mng BTS outdoor macro. V vy gii php ny c cc nh cung cp dch v di ng s dng ch yu khng ch Vit Nam m cn nhiu nc khc trong khu vc: Singapo (hng Singtel), Malaysia (hng Digi)...u im: ngun tn hiu donor n nh, mc tn hiu tt, m rng dung lng h thng d dng. Nhc im: gi thnh cao, yu cu phi c cch b tr tn s/knh c th v xy dng h thng truyn dn m bo tnh m thut.

b) H thng phn phi tn hiu- H thng phn phi tn hiu c nhim v phn phi tn hiu t ngun cung cp i n cc anten hoc phn t bc x khc v c phn loi thnh:H thng th ng:H thng th ng l h thng anten c phn phi bng cp ng truc v cc phn t th ng. y l gii php ph bin nht cho cc khu vc ph sng inbuilding khng qu rng, c c im:- Trm gc c dnh ring cho to nh. Tn hiu v tuyn t trm gc c phn phi qua h thng n cc anten. Vng ph cho to nh c gii hn ng thi khng lm nh hng n cht lng mng BTS outdoor macro. Nhng yu cu k s thit k phi tnh ton qu ng truyn cn thn v mc cng sut mi anten ph thuc vo s tn hao m cc thit b th ng c s dng, c bit l chiu di cp.- Cc thit b chnh gm: cp ng trc, b chia (splitter/tapper), b lc (filter), b kt hp (combiner), anten.H thng ch ng:H thng ch ng l h thng anten phn phi s dng cp quang v cc thnh phn ch ng (b khuch i cng sut). Vic s dng cp quang t BTS ti khi iu khin t xa c th m rng ti tng v tr anten ring l bng cch: tn hiu RF t BTS c chuyn i thnh tn hiu quang ri truyn n v c bin i ngc li thnh tn hiu RF ti khi iu khin t xa trc khi c phn phi ti mt h thng cp ng nh. Ngoi ra, h thng cn s dng cc thit b khc trong vic phn phi tn hiu: Hub quang chnh, cp quang, Hub m rng, khi anten t xa.

c) Phn t bc x- Phn t bc x c nhim v bin i nng lng tn hiu in thnh sng in t pht ra ngoi khng gian v ngc li. Do h thng inbuilding c s dng nhng khu vc c vng ph sng c bit nh ni trn nn i vi tng cng trnh c th i hi phi c phn t bc x thch hp. C th:Anten: s dng thch hp vi nhng vng ph c khuynh hng hnh trn hoc hnh ch nht. l v anten cho vng ph sng khng ng u, vic tnh qu ng truyn ph thuc nhiu vo cu trc ca to nh. C 2 loi anten thng c s dng l anten v hng (omni) v anten c hng (yagi). Anten v hng c tnh thm m, nh gn d lp t nn c th kt hp hi ho vi mi trng trong to nh, cn anten c hng c tng ch cao thch hp khi ph sng trong thang my.Cp r: c im ca cp r (cn gi l cp tn x) l c cng tn hiu ng u theo mt trc chnh nn thng c dng cho cc vng ph phc v ko di c bit nh: hnh lang di, xe in ngm, ng hm...

Anten Omni c s dng trong h thng IBS

Cc anten c b tr trong ta nhNgun: 4tech

3) S h thng- Mt h thng IBS c s nh sau:BTS --->Hybrid Combiner (hoc POI) --->Feeder --->Amplifier---->Feeder---->AntenTn hiu t trm BTS s c cho qua b ghp kt hp+B ghp kt hp( Hybrid Combiner ): C tc dng kt hp t 2 nh khai thc mng dng chung mt h thng.+ i vi nhng ta nh ln phi dng Amlifier khch i tn hiu (ng ngha vi vic nu Amplifier khng tt s khch i c nhiu).+ Sau khi qua Feeder cable s dn n h thng anten cc tng ca ta nh.

4) Li ch khi s dng h thng Inbuilding- Ph sng ton b ta nh cc thu bao c th thc hin cuc gi khng b gin on.- Ti u ha thit k v kinh ph thit b s dng v kh nng ph sng.- Trnh ph sng ra ngoi phm vi ta nh gim thiu kh nng nghn mng ngoi mun.- H thng In Building l mt h thng c lp khng ph thuc vo h thng outdoor bn ngoi nn vic s dng h thng ny bo m tnh bn vng n nh cht lng vng ph sng cho ta nh- H thng c kh nng tch hp tt c cc mng ang s dng trn ton quc nh cng mt lc c th dng chung cc mng nh Vinaphone, Mobifone,Vietteltrn mt h thng Inbuilding lp trc, c kh nng linh hot thay i cu hnh, nng cp cu hnh bo dng mng

5) Cc thit bi tich cc va thu ng c s dng trong h thng- BTS, Micro BTS.- Antenna: omni, sector , yagi.- Feeder cable: 1/2, 7/8- Coupler- Connector- Power Splitter: 1 in 2 out, 1 in 3 out, 1 in 4 out.- Jumper Wire- Combiner- Attenuator- Termination Loads- Line Amplifier- Repeater

VIETbuyer:K thut Inbuilding-IBS (Inbuilding Solution)Dien dan chuyen nganhCamera giam sat, IP camera, kiem soat vao ra, phong chay - chua chay