TAP CHl KHOA HOC & C6NG NGHf CAC TUlf^JNG DAI HpC KV THU^T * S 6 89 - 2012
THHI:T Kt at TH6NG QUAN TRAC HINH ANH THdi GIAN THI/C QUA MANG DI DONG 3G
DESIGNING A REAL-TIME IMAGE MONITORING SYSTEM OVER 3G MOBILE NETWORKS DS Trpng Tu^n, Nguyin Vdn D^c
Trudng Dgi hgc Bdch khoa Hd N01
Nhfn ngdy 31 thdng 5 ndm 2011, chip nhfn ddng ngdy 1 Ihdng 3 ndm 2012 T6M TAT
Cdfiff nghi m^ng dl ding 3G hiin duoc triin khai rdng khip t^l Viit Nam. Viic Ong dvng mdng 3G giii quyit sghdn chi truyin thdng da phuong tidn xit trin khia canh tinh di ddng vd khodng cdch cOng nhu Idm tdng khd nBng x[> /y thdng tin ddp img nhu ciu ngdy cdng da dang cOa ngudfi ddng Bdi bio trinh bdy kit qui nghiin cOv thiit ki xiy dgng hi thing quan tic hinh inh tCr xa qua m$ng di ddng 3G phgc vg cdng tdc giim sit vd cinh bdo mdv nudc sdng ti/ ddng theo thdi gian Oii/c, Kit qui thiit ki vd do dgc thgc nghiim duoc trinh bdy nhim kiim djnh chit luongvd dd 6n djnh cda hi th^ig,
ABSTRACT
Recently the third generation mobile networks have been widely deployed in Vietnam. The application of3G networks solves the problem of limited multimedia communications in term ofmobility and distance and atsohelps increase the capability of information processing satisfyingdiverse user demands. The paperdescnbes research results of designing a real-time system forremote image monitoring over 3G networksto support flood management and alarming actn/ities in Vietnam The outputproduct and on-fieldmeasurements are shown to evaluate the quality and stability of the designed system.
I. GlCfl THI$U
Cdng nghf di ddng 3G dugc triln khai img dung tai tgi Vift Nam Kr thdng 10/2009.
Hien tai, viing phu sdng cua 3G dd trai rgng khdp mgi mifn ddt nudc, tir thdnh thj tdi cdc VLing ndng thdn xa xdi. Van dl xdy dyng vd trifn khai cdc ung dgng trfn mgng 3G dang rdt dugc quan tdm. Vdi Igi thf vung phu sdng rdng khdp cung nhu khd ndng hd trg truyin thdng bdng rgng tren nIn giao thire IP, mgng di d^ng 3G Id mgt l^ra chgn tdi uu phyc vy cdc hogt dgng theo ddi, cdnh bdo, tim kifm euu ngn tgi cdc dja difm xung ylu nhu cdc hf thing df sdng, cdc VLing xa xdi heo Idnh. Vife quan sdi tryc tifp cdc hinh anh nhu myc nudc, tinh trgng de diiu s5 giup dua ra cdc danh gid, cdc quyei djnh nhanh chdng vd kjp Ihdi. Tren co sd dd, nhdm nghien cim tai vifn Difn tir Vien Ihdng, Dai hgc Bach khoa Hd n^i dd tifn hdnh nghifn cim, thilt kl, xdy dyng hf thdng quan trde hinh anh tlidi gian Ihuc qua mang di dgng 3G nhdm trien khai tai cac vi tri xung ylu edn Iheo ddi.
Cac chuc ndng chinh md he Ihdng cdn phdi cd bao gom: kit ndi mang 3G. ehup anh, xir li dif lieu va giri ve tram theo ddi trung lam Iheo thdi
gian thye. Bfn canh cdc hf thing quan trde duge Idp d$t cd djnh, trgm thu thfp dii lifu dugc thilt kl tinh nSng ty xdc djnh vj tri su dyng vf tinh djnh vj todn cdu dl xdc djnh chinh xdc vi tri diim docdn quan trficnhdm ddp Cmg kha ndng di dOng vd quan ly thdng qua dnh xg len bdn dd sd. Tgi trung tdm quan trde s6 cd mdt chuang trinh phdn mIm mdy chu df hiin thj vd luu tril cdc hinh anh chgp dugc. E)6ng thdi, hf thing cQng eho phfp hifn thj thdng trfn website phyc vy vife truy nh$p qua internet.
Hmh 1. Hmh anh mmh Iwa lH lut xdy ra tgi Viet Nam
TAP CHl KHOA HOC & C6NG NGHf CAC TRITONG D*! HQC KV THU-^T * S 6 89 - 2012 2. THifcT Kt Hf T H 6 N G
^ Vdi nhOng yfu elu d$t ra nhu trfn, hf thing sS dugc xdy dyng bao gIm cdc trgm thu thfp dQ lifu dnhtCr xa vd phin mIm cdi d$t trfn mdy chu trung tdm nhu thi hifn trfn Hinh 2.
Trgm thu thfp do lifu dnh gIm module phin edng dugc ngp phin mIm nhiing cd khd nfing tdi cdu binh ti^ xa. Module phin cdng cd chiic ndng chyp dnhtheo thdng si ciu hinh duge thilt Ifp vd ty xdc djnh vj trf sir dyng cdng nghf GPS.
DO- lifu thu thfp dugc gdi ddng gdi vd truyin vl trung tdm qua mgng di d$ng 3G theo giao thirc TCP/IP. Module phin mIm cdi dft trfn mdy chu trung tdm ed nhifm vy nhfn dU lifu gui vf, bde tdeh dd lifu, luu tr& vd hiin thj hinh dnh nhfn dugc tgi trung tdm vd dua Ifn website.
Ngudi qudn trj tgi mdy chu trung tdm cd khd ndng thilt Ifp ede thdng s i ciu hinh tir xa cho phdn cung trgm thu thfp dii lifuthdng qua cdc gdi tin difu khiln trfn nIn giao thiic IP hofc qua tin nhdn SMS.
3. THVC THI Hf T H 6 N G 3.1 Thyc thi phin cthig
Clu trde phin cdng cua trgm thu thfp dO*
lifu dnh (Hinh 3) bao gdm cdc khii chiic ndng chfnh: chgp dnh, thu dQ lifu GPS, giao tiip qua mgng 3G vdi trung tdm xii \^ vd diiu khiln.
Khii chdc ndng thu thfp di^ lifu dnh sii- dyng camera C328 hofc OV7725 thye hifn chyp vd nfn dnh theo chufin JPEG. Khii chirc ndng giri dtt lifu vl server dugc thilt kf su dyng module SlM52i8A. Dfiy Id module hd Irg giao tiip vdi mgng di d^ng theo chufin GSM/GPRS/UMTS duge thilt kl dl hogt d$ng d cdc ddi tin si ciia ed mgng 2G vd 3G. Vdi kfch thudc nhd ggn (35mm x 35mm x 4.5mm), dugc thilt kl bdng kT thuft tilt kifm ndng lugng, module ndy rdt thich hgp cho cdc dng dyng di ddng vd tniyfn thdng dQ lifu dnh qua mgng di dfng 3G.
Hmh 2.Sadd kien Ink hii ihong
^ M o b i l t - - v
Hinh 3 Sa do khdi ihlel ke phdn cimg tram lim llidp die lieu anh 33
T,^P CHf KHOA HQC & C6NG NGHf. CAC TKldNG D^l HQC KV THUi^T 4 S6 89 - 2012
Hmh 4.Cdu Iruc gdi dit ii<^u truyin ihdng gllta d^u cuSi vd mdy chu Qua giao tiip SlM52t8A, hf thing phin
cimg cQng cd khd nfing tdi clu hinh tir xa qua kit nii IP hofic tin nhdn theo cd phdp dugc thilt kl nhfim thyc hifn cdc chiic ndng nhu cdu hinh thdng si hogt dOng, clu hinh dja chi IP ciia mdy chu trung tflm, ID cua trgm do vd chi df chyp dnh.Vi diiu khiln ATMegal28 ddng vai trd Id khii diiu khiln tmng tdm, diiu khifn vifc clu hinh. kit nii mgng 3G cua SIMS2I8A; diiu khiln camera chgp dnh, nhfn dQ lifu tir camera, thu si lifu djnh vj, ddng gdi dtt lifu thdnh khudn dgng thfi hifn trfn Hinh 4 vdxult ra cing USART dfigui vl server qua module SIM528A.
Bdng diiu khiln glm cdc phim bim ndi vdi vi diiu khiln dugc thilt kl dl ed thi thilt Ifp cdc thdng sd hogt dfng ciia mgch tryc tiip tgi ddu cudi. Ddng thdi m^t mdn hinh LCD 1602A dugc sii dyng dl hiin thj cac ihdng si hodc trgng thdi hogt d^ng cua mgch {khdi igo, dangkelndi. dang gui dir lieu...). Bfin cgnh dd, khdi nguin dugc thiet ke nhdm cung cap nguin eho mgch hogt dfng su dung acquy 12V dl thieh hgp cho cdc vj tri khdng cd hodc khd khdn vl ngudn difn. Khdi thu thgp da lifu anh dugc kft ndi vdi khdi do muc nudc. Khi mirc nude ddng cao qud mgt gidi han eho phfp, khdi do mure nude sg giii mpt tin hifu cdnh bdo sang vi difiu khien. Khi dd, mgch phan ciing chuyin sang chi dd canh bdo.Vi diiu khiln sg diiu khien lien tyc chyp dnh theo ehu ki dd djnh vd giii vl mdy chii trung lam eho din khi tin hifu canh bdo tir khdi do mirc nudc kit thiic. Hinh 4 thi board mgch phan cimg cua trgm thuthfp hinh anh.
3.2 T h y t thi phan mem
Chuc ndng quan trgng ciia phdn mfm trung tdm ehinh Id giai thugt thu cdc gdi tin dii lifu vd Ihdng tin vj tri ciia tram thu thdp d xa theo thdi gian thyc (Hinh 6). Qud trinh nhdn cdc gdi tin diln ra lien tyc cho Idi khi hf thing bdt duge Iir khda ket thuc truyen dd lieu theo cdu true thi hifn tren Hiijh 4. Sau khi dd nhdn xong cdc gdi tin, hf Ihdng tifn hdnh sip xip eac gdi tin den thdng sd thir tu dugc ddnh d ddu mdi gdi
khi gtii di. K I dd hf thing tiin hdnh Ifip ghfp Igi cdc gdi tin thdnh do lifu ban diu. Luc ndy do lifu ting dugc luu Irong mang NData vdi NDataLen chf d$ ddi thyc sy cCia dO lifu nhfn dugc. DO lifu sau dd dugc phfin tdch thdnh hai phin: Phin do lifu finh vd dO lifu GPS. Kit thuc tiin trinh nhfn finh, qud trinh Ifing n ^ e chd do lifu din Igi dugc bat diu Igi.
Hinh 5 Ket qua thiet ke mgch phdn cung Phdn mIm duge thilt ke vdi giao difn chde ndng thdn thifn, de sir dyng. Trfn giao difn cd hai phdn ehinh td phdn hiin thj cdc thdng tin vf server, thdng tin vl buc dnh (vj tri, Ihdi gian. dung lugng...) vfi phdn hifn thj anh vira nh§n dugc. Hinh 7 thf hifn giao difn chuong trinh phfin mem cai d$t tgi mdy chu trung tdm vd hiin thj hinh anh tryc tuyfn tren website vdi dO lifu dugc cgp nhft theo thdi gian thyc tir cdc trgm thu thgp phdn tdn.
4.KfeTQUATHU NGHltMVADANHGlA Hf thing dugc thyc nghifm vdi nhilu kjch ban khdc nhau nhdm kifm djnh cdc tinh ndng dd dugc thilt kitheo md hinh ihl hifn trfn Hinh 8. Hf thdng dugc thyc nghifm vdi mgt sd k[ch bdn tifu bifu trong cdc difu kien truyin ddn vd vj tri thu thdp dO lieu khde nhau. Kit qud hinh anh ihyc dja tgi ba vj tri thyc dja khde nhau gdm tram Anh cdnh, Thudng Tin, tram Yfn Duyft, Chucmg MJ vd trgm Son Da. Ba Vi, Hd Ngi dugc quan trde lai phdn mfm may chu Irung tam hofc tren website theo thdi gian Ihuc.
TAP CHf KHOA HQC & C 6 N G NGHf C A C T R I T O N G DAI HQC K^ THU^T • S6 89 - 2012
Hinh 7. Giao dien chinh cua chuang trinh phdn mem
Hinh 8 Md hinh thif nghiem he Hmh 9 Hinh anii quan Irac gifi ve lif Irgm do An Cdnh - thong Thuang Tin Hd Noi
TAP CHl KHOA HQC & C6NG N G H S ^ O ^ ^ U O N C PAI HQC KV THU^T • S6 89-2012 Kich bdn thu- nghiem 1: Ty dfng chgp vd giM
lifn tiip IS biic finh vl sei^'cr trong djlu kifn thdi tilt tit. Cdc thdng si clu hinh tifu bilu glm chu kl liy dnh cd thi clu hinh vdi gid trj biin thifn hvng ddi gifi trj n*10 gidy - n'l'IO phdt - n gid, dnh nfn theo chuin JPEG, df phdn gidi dnh tir 120x160 din 640x480, tic dO truyin dnh tir 38,4 kbps din 115,2 kbps.
Kit qud thyc nghifm trong diiu kifn thdi tilt tit thi hifn trfn Hinh 10. Ting si dnh da gOri vd nhfn thdnh cdng Id IS, vdi chit lugng dnh tit, dnh khdng bj mit gdi. Dung lugng trung binh ciia dnh Id 57,309 KBytes. Tri dudng truyin trung binh Id 0,439s. Anh quan trie tgi trung \&m cd chit lirgng dnh tit.
Kfch bdn thu nghi4m sd 2: Chyp vfi giii vl mfiy chu 15 bde dnh yong diiu kifn thdi tiet xlu, trdi mua to, dudng truyin di dfng khdng In djnh.
Kit qud thye nghifm thfi hifn trfn hinh 10, eho thIy cd tin that gdi tin bifn thifn tir 2 din 10 gdi tin trong ting sd gdi tin trung binh Id 115,5.
So goi
TJ If tin thit gdi tin tuong ling Ifi 3,56%. Chit lugng finh h\ finh hudng do tin thit gdi tin dugc gidi quylt thdng qua truyin l$ip gdi tin vd dugc ddnh gifi qua kjch bfin thyc nghifm s6 3.
Kfch bdn Ihu nghifm ao 3: Chyp finh trong chi df cd truyin Ifp gdi tin
Trong chi d$ truyin Ifp gdi tin vdi hf si phdt Ifp khfic nhau, qud trinh truyin cdc gdi tin Uru gio mdt biix: dnh sf dugc dfit trong m$t vdng Ifp.So lln Ifp dugc xfic djnh bdi mOt tham si da dugc thilt Ifp trudc. Sl lln truyin Igi cd Ihl Id 0 (khdng Iruyin Ifip). I, 2 hofc n lln (tuong img vdi ting s i lln truyin m^t gdi tin sf Id 1,2,3 hofc n lln). Kjch bdn thir nghifm dugc thyc hifn vdi s6 lan truyin Ifip khfic nhau cua IS birc dnh. Bdng I cho thiy kit qufi truyin Ifp gdi tin hai lln cho kit qufi cdt thifn fii^ quan trie nhd gidm ty If iSi tin thit gdi tin tir 3.56%
xuing cdn 1,5%. Trong diiu kifn thdi tilt xlu, vifc truyin Igi sf rit cd y nghTa i^ dfim bfio chit lugng hinh dnh quan trfic.
Hinh 10 Dd ihi so gdi bi mat so vdi long .vt'j gdi gtn di Irong dihi kn-n thai Hit ldi
hoa * °
• S6 goi g u i
• So goi mac
1 2 3 4 5 5 7 8 9 10 11 IZ 13 l i 15 Chi so anh
Hinh 11. Dd thf li le .so gdi bi mdi so vdi long sd gdi gid di irong dieu kien thai tiitxdu
TAP CHl KHOA HQC & C6NG NGHf CAC TRir^NG D*I HQC Kt THUAT * S6 89 - 2012 Bang 1. Ket qud thifc nghiem kich bdn truyen igp gdi tin linh iheo gid tri trung binh
Tong so goi giVi Tong so g6i nhan Ty le ton that gd ( t n i n g binh)
Kh6ng truydn ldi 115,5 Truy«nl»i 1 I k 230,2 Truyin Ui 2 lltai 345,4
(trung binh) tin t r u n g binh 111,5
225,4 340,2
3,46%
2,08%
1,50%
5. K £ T LUi^N
Bdi bdo trinh bdy mft phdn kit qud nghifn cim thyc hifn trong khudn khd dl tdi cfip thdnh phi '^ThiSl ki h0 thdng gidm sdt vd cdnh bdo muc nudc sdng tif ddng tgi mgt sd vi tri de xung yiu khu vifc Hd A'ip/".Hf thing quan trie hinh dnh thye dja i^i trung tdm theo thdi gian thyc dugc thyc nghifm tgi ba vj trf df khdc nhau gdm trgm Anh cdnh, Thudng Tin, trgm Yen Duyft, Chuong My vd trgm Son Dd, Ba Vi, Hd NOi. Kit qud quan trie hinh dnh tir xa qua
mgng di dfng 3G theo thdi gian thyc trong nhilu diiu kifn khdc nhau dfu eho kit qud Idt.Trong tinh hudng thdi tilt xlu, phuong dn truyin Ifp cdc gdi tin cho kit qud hinh dnh quan trde dirge cdi thifn. Tdy vdo diiu kifn dudng truyin vd tuyin vd ti If mdt gdi lifn tifp md gid trj sd Idn truyfn l$p duge thilt Idp.Cdc nghien ciiu kf tifp tap trung tli uu phin ciing nhdm dam bao dg tin cgy vd tfnh In djnh khi trifen khai hf thdng trfn thyc If.
TAI LIEU THAM KHAO
1. Bemhard H. Walke P. Seidenberg M. P. Aldioff, UMTS: The Fundamentals, Wiley & Sons Ltd, 2001
2. Markus Rupp, Video and Multimedia Transmissions over Cellular Networks, Wiley & Sons Ltd, 2009
3. David Soldani, Man Li, Renaud Cuny, QoS and QoE Management in UMTS Cellular Systems, Wiley & Sons Ltd. 2006
4. Simcom, SIM5218A Hardware Design v 1.05, 2009 5. Simcom, SIM52I8A AT Commands Set vl.88, 2009
6. Omninvision, OV7725 Color CMOS VGACAMERACHIP ver 1.4, 2007 Bia chi lien hf: Dd Trgng Tudn - Tel: (04) 3869.2242, email: [email protected]
Vien Dien tu Vifn thdng, Trudng Dai hgc Bach Khoa Ha Ngi Sd I, Dgi Cd Viet, Hai Bd Trung, Hd Ndi