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Phn b lu lng Internet l vn ngy cng tr nn cp thit i vi cc nh cung cp dch v mng do s pht trin khng ngng ca cc lp ng dng mi hi t trn nn IP dn n lu lng ca cc dch v vin thng lun tng ln c tnh t bin trong khi s pht trin m rng bng thng b hn ch bi nhiu l do khc nhau.

a s cng trnh nghin cu trc y lin quan n c tnh ha lung lu lng mi ch a ra nhng xut ci tin i vi cc lp kin trc ring r, km theo cc trang thit b cn thit theo nhu cu thi gian thc. iu i hi nhng xut mi i vi nh qun l cung cp dch v cha c iu kin trang b nhng thit b chuyn dng trong khi phi m bo s hot ng n nh v qun tr, cung cp dch v.

Gii php da trn nhng c tnh ca lung lu lng IP Internet nh danh lu lng phi truyn thng phc v an ninh mng v gii php x l, phn b lu lng IP Internet s c minh chng l c kh nng h tr cht lng dch v i vi cc ng dng thi gian thc trong mi trng hn tp. gii quyt vn nm bt, phn tch d liu theo thi gian thc phc v h tr vic phn b lu lng IP Internet theo cht lng dch v tng thch v phc v nhim v bo m an ninh mng, chng li nhng cuc tn cng mng, cn khai thc cc phn mm m ngun m v s dng thi gian thc h tng c s mng ca mt nh qun l, cung cp dch v c th c tnh i din. Lun n tp trung vo nghin cu cc vn sau:

1). Nghin cu tng qut v c tnh ho lu lng ca IP Internet v m ngun m lin quan v cc yu cu lin quan ti vic m bo QoS. 2). Nghin cu phng php iu khin c cc mc u tin tng ng vi cht lng dch v i hi bi cc lp dch v khc nhau trong mi trng truyn thng a chiu, a dch v xut chin lc nh tuyn theo thi gian thc ph hp.

3). Nghin cu cc gii php chng tn cng mng nhm bo m an ninh mng cng nh duy tr cht lng dch v. 4). Dng d liu ca Vin thng Tha Thin Hu, nh cung cp dch v mng vin thng thi gian thc tin hnh thu thp d liu, phn tch, th nghim cc kt qu nghin cu do tnh i din v mi trng tch hp cc loi hnh dch v v an ton mng, an ninh thng tin. Cc kt qu nghin cu v l lun v thc tin nu trn c trnh by trong 4 chng ca lun n vi cc tiu nh sau: Chng 1: Tng qut v c tnh ha lu lng IP. Chng 2: c tnh thng k v iu kin gii hn phn b lu lng IP Internet. Chng 3: Cc iu kin gii hn v phn b lung lu lng IP Internet theo cht lng dch v (QoS) tng thch. Chng 4: Nghin cu v cc gii hn trong chng tn cng t chi dch v (DoS) v su Internet CHNG 1 TNG QUT V C TNH HA LU LNG IP

1.1. Gii thiu

Nghin cu sinh da trn c s l thuyt v s dng cc m ngun m c uy tn tin hnh iu tra mng vin thng ti n v cung cp dch v nhm tng hp cc s liu lu lng v ng gp vo s hiu bit v hnh vi mng quy m ln. Nhng kt qu nghin cu tng qut v c tnh ha lu lng IP s c nghin cu sinh trnh by theo kiu mt ti liu hng dn i vi cc nh qun l mng, cung cp dch v mng trong chng ny.

1.2. Lu lng v cc c tnh phn loi

C nhiu loi lu lng khc nhau trn mng v c th phn cc ng dng thnh loi theo thi gian thc v khng theo thi gian thc. Cc loi lu lng ng vi ng dng khc nhau, ngay c khi chng c cng im xut pht, cng im n v cng cch thc truyn thng, th c cc c tnh ngu nhin v nhu cu v QoS (cc tham s th hin bng thng, t l mt gi, v.v) khc nhau v c th phn tch cc yu cu v QoS da trn mc thi gian v mc truyn dch v (mc gi, cuc gi) khc nhau. M hnh lu lng i vi cc dch v c bn da trn l thuyt Erlang, gm hai tham s chnh (tc xut hin cuc gi v thi gian chim gi trung bnh) xc nh lu lng ra ng vi thi gian s dng ti nguyn.Nu phn b Poisson ph hp vi thng k xut hin cc cuc gi th i vi h thng c N knh, tng lu lng A, thi gian gi cuc trung bnh , tr ln nht cho php trc khi cuc gi mi b kha T. Xc sut khng c server (h thng bn, cuc gi mi b kha) GOS theo m hnh Erlang B khi khng c c ch tr T v xc sut khng c server khi c c tr ln hn T tun theo m hnh Erlang C :

Erlang B: ;

Erlang C:

(1.1)

hiu c ch hot ng phc tp ca mng, c tnh ho lu lng c xem nh mt hm nhiu tham s. Thng k lu lng phc v mc ch c tnh ho c nghin cu sinh s dng y l phng php gp chi tit (Aggregation granularity, AG); phn tch h thng trn c s chia h thnh cc phn h khc nhau hiu bit chi tit hn v tng hp c tnh ca cc phn h c nhng c tnh ca ton b h .1.3. V cc phn mm m ngun m s dng

Nghin cu sinh chn hai phn mm m ngun m vo vic trin khai gim st, phn tch c tnh lu lng ti mng vin thng Tha thin Hu. - ng dng phn mm NTOP quan st, gim st, thng k mt khu vc (nhm ngi dng) v t l s dng cc loi giao thc mng (tp trung lp 4) xut v vic thit lp cc QoS cho tng loi giao thc tng cht lng phc v ngi dng.

- ng dng phn mm m ngun m Observium quan st, gim st v thng k lu lng tng qut, ch yu lu lng lp mng (lp 3) ca mng cung cp dch v MAN-E nhm mc ch phn tch, a ra cc xut ti u v quy hoch bng thng ng truyn, nh tuyn cho mng MAN-E i vi dch Internet v IPTV.

Bng cch quan st chung nhm ngi dng, NTOP c th cung cp cho nh qun tr mng v t l cc loi dch v Internet m ngi dng s dng nh th no.

Phn mm Observium c pht trin thnh mt cng c d cu hnh dng gim st tnh trng hot ng ca mng my tnh. Trong ng dng Observium thc t trin khai VNPT Tha Thin Hu thay i cc gi tr tham s cho ph hp vi yu cu gim st v thng k s liu .1.4. Kt lun chng

Lung lu lng IP truyn thng trn mi trng phn tn, khng ng nht y l i tng nghin cu nm trong khun kh ca bi ton phn tch lu lng ni chung nhm tham s ha hay c tnh ha nhn bit lp ng dng ca lu lng ni ring. Khi gn vi chc nng ca mt nh qun tr mng, ngoi vic m bo QoS, khai thc tim nng mng th nhim v m bo an ninh mng, an ninh thng tin i hi v cc pht hin dng lu lng c c tnh khc nh c tnh tn cng ca tin tc v tin rc. iu ny i hi vic phn tch tn hiu theo khng gian nhiu chiu, p dng phn b ngu nhin nhiu chiu tng ng pht hin thm cc tham s trong qu trnh c tnh ha lung tn hiu IPCHNG 2: C TNH THNG K V IU KIN GII HN PHN B LU LNG IP INTERNE2.1. Gii thiu chng

Trong chng ny, nghin cu sinh trnh by c tnh lu lng IP Internet ca cc dch v khc nhau (tng tc a phng tin thi gian thc, ) i vi mi trng mng (Web v Client-Server, di ng v mng khng dy, ) khc nhau, gii hn xt y l QoS v in hnh l tc nghn. Ngoi ra, chng ny cng xut v phn tch cc iu kin gii hn trong vic phn b lu lng da theo QoS v ngng tc nghn.

2.2. c tnh lu lng ca nhng m hnh khc nhau

2.2.1. Tng tc a phng tin v lu lng thi gian thcNhng kt qu v lu lng thi gian thc v a phng tin thu c t cc m ha-gi m tc Bit nh lu lng m thanh PCM v hnh nh MPEG-1 c m t mt cch bao qut bi nhiu k thut, m hnh trong cc phn tch cu trc t tng quan ca b m c bn v cc qu trnh im. S pht sinh ca nhng dch v tng tc mi trong mi trng a phng tin v Internet di ng dn n s xut hin ca cc phng php m t mi nh k thut m ha-gii m thch ng nh b m ha-gii m a tc thch ng UMTS (AMR) v MPEG-4.

Trc ht, cc i hi v cht lng dch v ca nhng dch v ni tri nht (hi ngh truyn hnh v phng tin di ng) c trnh by lm c s thng qua nghin cu, thu thp s liu , nghin cu sinh xut khuyn ngh v kh nng cho php i vi QoS ca cc dch v Audio v Video.

2.2.2. i vi lu lng Web v Client-ServerDo s xut hin lin tc cc ng dng, dch v mi, k c cng ngh truy cp mng bng rng nn m t lu lng truy cp Internet tr thnh vn quan trng i vi c nh cung cp dch v Internet (ISPs) v cc nh khai thc mng truy cp. S thay i nhanh v cc c tnh lu lng i hi cc php o lu lng mt cch thng xuyn v phi p ng tiu ch k thut; cc php o lu lng thc hin cc mc phn gii khc nhau ph hp vi nhim v chn lm mc tiu v cc php o c thc hin trn nhiu loi khc nhau ca i tng.Nghin cu sinh thc hin cc php o ti hai ISP khc bit k hiu l ISP1 v ISP2 vi mt mng CATV lm ISP1 v ADSL lm ISP2 c c nhng kt lun c th.

2.2.3. i vi di ng trong mi trng mng khng dyNghin cu sinh trnh by v cc php o, m hnh v phn tch cc lung lu lng trong mng GPRS. Trong , gm Cc php bin i Radon v cng c tng t lin quan n nhng c tnh Up-link (m ha knh, s lng cc knh d liu gi Up-link (PDCHs) dng trong kt ni GSM/GPRS) v chng trnh Tstat, dng phn tch cc lung TCP/IP/GPRS t du vt lung TCP.2.3. iu kin gii hn s dng m hnh, phng php

Trong phn ny s trnh by nhng vn lin quan n cc kt lun v tnh trng hay gii hn mng li da vo cc php o (chng hn nh kt lun v bng thng tc nghn, bng thng sn c, v lu lng cho nhau v..v.) bng cch s dng s liu thng k lu lng (xc nh suy gim QoS ca End-to-End). 2.3.1. Nhng th biu thng lng khc nhau

Dng biu thng lng vo v ra thng c dng vi phn gii thng lng R. Nhng nghin cu thc nghim ch ra rng vic so snh hot ng tt cho nhng khong thi gian Rmax/R +1 20 i vi n 600. Hnh 2-3 cho thy nhng biu thng lng t cc php o vi ng dng truyn hnh hi ngh theo nhng mc nhiu lon lu lng truyn qua khc nhau v cc hin tng tc nghn cc b khc nhau..

Hnh 2-3.Biu thng lng t cc php o i vi ng dng truyn hnh hi ngh

2.3.2. nh hnh v phn chia gii hn tc nghn

Nghin cu sinh trnh by nhng vn lin quan n nh hnh v phn chia gii hn tc nghn. 2.4. Kt lun chng

Cc kt qu v c tnh ha lu lng trnh by trong chng 1 v cc phn tch y c dng lm c s bn v cht lng dch v QoS tng thch trnh by trong chng 3 v v bo v chng tn cng, an ninh mng trnh by trong chng 4.CHNG 3: CC IU KIN GII HN V PHN B LUNG LU LNG IP INTERNET

THEO CHT LNG DCH V (QoS) TNG THCH

3.1 Gii thiu chng

Chng ny trnh by phng php iu khin tng thch xc lp trn quan im ca l thuyt truyn thng nhm mc tiu phn b lu lng, m bo cht lng dch v da vo kin trc middleware c trnh by sau khi i nt v cht lng dch v ca mng (QoS) tng thch. Tip n trnh by phng php gii quyt c ch u tin lu lng u tin trong mng hng i ti mt node mng nhm vo tnh tng thch ca cht lng dch v trn c s ca phng php iu khin hin i .

3.2 V tng thch QoS trong mi trng Internet

Nghin cu sinh s dng mt c ch gi l QoSSpace to ra mt QoSReport v cc kh nng gia QoS ca mng v gi tr trng thi lung ca ng dng qua gi tr trng thi tng ng (SCV) ca mi lung. 3.3 iu kin tng thch QoS i vi Middleware3.3.1. Kin trc middleware m bo QoS

Hnh 3-2. Kin trc middleware tng thch QoS theo ng dng.3.3.2. Cc c ch iu kin tng thch trong h thng QoS middleware:

Xc nh cc c im QoS ca ng dng ; Bin dch QoS ; Thit lp QoS; Cc c ch iu kin tng thch QoS3.3.3. p dng m hnh iu khin truyn thng

Hnh 3-5. M hnh iu khin tc v.Phng trnh m t bin i ti nguyn c cp php c dng

(3.7)vi, x(k) l tng s cc yu cu ti nguyn c trong hng i c thc hin bi tt c cc tc v ng dng thi im k, u(k) l tc yu cu c iu khin bi b iu khin (cng vic iu khin tng thch) v M(k) l tng s cc tc v ca ng dng hin hnh, c l tc cp php yu cu.

3.3.4. Cc iu kin v m hnh iu khin tc vMc ch ca iu khin cc tc v l duy tr tng cc yu cu ti nguyn trong hng i x(k) ca ng dng nm xung quanh gi tr tham chiu xc(k). Tc v tng thch thc hin thut ton iu khin no da trn cc yu cu ti nguyn trong hng i x(k) v gi tr tham chiu xc(k) hiu chnh yu cu ti nguyn ui(k). Yu cu hiu chnh ti nguyn ui(k) ca tc v tng thch Ti tha mn x(k) c m t bi phng trnh sau:

ui (k) = ui (k 1) + [xc (k) x(k)]+ {[xc (k) x(k)] [xc (k 1) x(k 1)]} (3.8)vi, v l cc h s cu hnh ca tc v tng thch.

3.3.5. ng dng m hnh iu khin tc v trong kin trc middleware

Nghin cu sinh xut s dng m hnh iu khin tc v theo c ch phn cp tng thch QoS trong kin trc middleware cho thy middleware c kh nng tng thch QoS c trong trng hp khi c nhng thay i nh v thay i ln v sn sng ca ti nguyn.

Phng trnh m t tng lng yu cu ti nguyn trong ton b h thng nh sau :

s(k+1) = (amax {s(k) + l(k)(k) + SN(k) - a},

(3.9)

trong amax l lng yu cu ti nguyn c cp php cc i ca h thng u cui.

Phng trnh m t lut iu khin PID cho mi tc v tng thch nh sau:

,

(3.10)

vi v l cc h s t l.

3.4 Gii hn phn b lu lng u tin trong mng hng i3.4.1 M hnh ha c ch u tin lu lng trong mng hng iMinh ha qun l hng i lu lng theo l thuyt iu khin nh trong hnh 3.9.

(

Hnh 3-9. M hnh bi ton phn b lu lng hng iVi phng php tuyn tnh ha, h phng trnh ton hc m t ng hc ca bi ton qun l hng i:

- H thng hng i h: (3.11)

- H thng hng i kn: (3.12)

trong ,,,, m ( min(p, q); v l cc t hp tuyn tnh ca tn hiu kch thch v p ng; ,, l cc ma trn tham s cn xc nh theo tham s h thng {A, B, C}, c th gm i lng c trng tr, thi gian ch, di hng i, xc sut nghn trong h thng.

3.4.2 Gii quyt bi ton u tin lu lng trong mng hng i

a> Gii quyt bi ton mng hng i hPhng trnh cn bng xc sut chuyn trng thi :

(3.21)

b/ Gii quyt bi ton mng hng i kn

Phng trnh cn bng xc sut chuyn trng thi trong ton mng l:

(3.29)

c.) Gii quyt bi ton hng i i vi lu lng nhiu chiu3.4.3 Bn lun v nhng iu kin gii hn lin quan n x l mng hng i

Nghin cu sinh trnh by mt s vn lin quan :

Hn ch v cht lng mng vin thng qua m hnh ton hc

Gii hn t c tnh n nh ca cc m hnh h thng tr

Gii hn do cc m hnh ngu nhin s dng

3.5 Kt qu m phng

3.5.1 Thit lp h thng iu khin

H thng iu khin tng thch m t bi cc phng trnh (3.9, 3.10) v c th hin trong hnh 3.19 trong mi trng Matlab.

Hnh 3-19. S m phng h thng iu khin tng thch QoS.

3.5.2. Thit lp tham s cu hnh thy c nh hng ca cc tham s cu hnh ( v ( n cc c tnh n nh, c tnh cn bng ca h thng iu khin cn thc hin m phng h thng iu khin trong cc trng hp thit lp tham s cu hnh ( v ( khc nhau i vi h thng iu khin khng n nh v h thng iu khin n nh.3.5.3 Phn tch c im ca h thng theo m hnh l thuyt

Nghin cu sinh a ra mt s phn tch vi h thng iu khin tng thch, cc tham s cu hnh c la chn nh trn, theo cc c tnh n nh v c tnh cn bng.3.5.4. Kt qu m phng ti Vin thng Tha Thin Hu

Nghin cu sinh trnh by cc kt qu m phng h thng iu khin tng thch trong trng hp thit lp cc tham s cu hnh ( v ( khc nhau .3.6 Kt lun chng

Nhng kt qu nghin cu lin quan n s dng kt qu v c trng ha lung lu lng (trong chng 1 v chng 2) xem xt, phn b lu lng tng thch QoS phc v cho nhim v m bo QoS theo ngha thch nghi trn c s p dng l thuyt iu khin c trnh by. CHNG 4: NGHIN CU V CC GII HN TRONG CHNG TN CNG

T CHI DCH V (DoS) V SU INTERNET

4.1 Gii thiu chng

Nh qun tr mng s dng tp cc tham s c trng ha lung lu lng IP Internet (Chng 1 v 2) cung cp QoS dch v theo cc mc u tin khc nhau (Chng 3) v m bo an ninh cho ton h thng mng trong khun kh pht trin theo ba bt k, (three any: any time, any where, any form trc nhng hnh ng xm nhp mang tnh tc thng tin , trit h tng mng (hay tn cng gi chung). Cc cuc tn cng hin nay thng c phn tn mc cao v phi hp tt (tn cng t chi dch v phn tn (DDoS), su Internet chng hn) gy nhng nh hng x hi nghim trng v thng tin, lm gin on dch v quan trng, tn tht ln v kinh t, v.v... v tr thnh mt trong cc ti phm nghim trng bc nht. Bo v h tng mng trc cc cuc tn cng tr thnh mt vn quan trng cn c khn trng gii quyt.Trong chng ny, nghin cu sinh trnh by cc kt qu nghin cu v pht hin, i ph trc cc cuc tn cng mng kiu phn tn (DDoS v su Internet) v trnh by xut phn ng chng li cc cuc tn cng mng bng phng php phn b lu lng IP s dng iu kin gii hn Proxy. Nghin cu sinh cng s dng cc cng c m phng trc tuyn xc nh kh nng chng li nhng ca cuc tn cng theo l thuyt v trong thc t (mt mng m phng vi mt kch c c th so snh c vi mng ISP).4.2 Mt s vn lin quan n tn cng mng4.2.1 Gii thiu v tn cng mng

Nhng cuc tn cng mng da ch yu vo cc l hng ca phn mm, ca giao thc mng v ca c s h tng. L hng phn mm l do li trong ci t cc phn mm mng (nh DNS BIND, HTTP Apache, Telnet, SMTP...). Trong phn ny, nghin cu sinh tho lun hai kiu tn cng mng nguy him, ph bin trn Internet hin nay. l tn cng t chi dch v v tn cng kiu su internet.4.2.2 C s v cc vn lin quan n DoS

Trnh by cc vn lin quan n DoS nh : Cc bc c bn trong vic chun b v tin hnh mt cuc tn cng Ddos, Cc cuc tn cng DoS, phng th DoS da trn mng Proxy.4.2.3 Su Internet: C s v cc vn lin quan

Trnh by cc vn : Mt s thng tin c tnh c bn v cc loi su Internet ra i trong vi nm qua, cc phng php qut ca su Internet, phng chng su Internet.

4.3 Chng tn cng t chi dch v (DoS) v cc gii hn4.3.1 Gii thiu

S dng m phng mng li mc gi trc tuyn (y ng dng, phn mm thc thi v cc chng trnh tn cng thc) cho php nghin cu chi tit mng li, ng hc ng dng (rt gi, nh tuyn hng i, thi gian thc), hnh vi phn ng ca mng v giao thc ng dng (tham s quan trng i vi ng dng, hiu sut mng Proxy trc cc cuc tn cng DoS).4.3.2 H thng phng th DoS da trn mng Proxy

Dng mt mng m phng quy m ln (dng MicroGrid m phng mc gi trc tuyn) , nghin cu hiu sut ng dng cung cp bi mng Proxy trc cc cuc tn cng DoS . Sau s dng cc ng dng, chng trnh tn cng thc a nhng th nghim vo trong mi trng mng m phng.B cng c m phng hnh vi tn cng DDoS thng dng s dng Trinoo c sn trn Internet . Nghin cu sinh thc hin ba b th nghim : nghin cu nh hng ca cc cuc tn cng DoS ln ng dng khng c bo v bi mng Proxy ; nghin cu hiu sut ng dng trc hai cuc tn cng DoS quy m ln kiu dn tri v tp trung tm hiu kh nng chng li trc cc cuc tn cng ny ca mng Proxy; nghin cu hiu sut chng li cc cuc tn cng ca mt mng Proxy c kch thc thay i khi t l gia cng tn cng v kch thc mng Proxy c nh tm hiu kh nng m rng tnh i khng ca mng Proxy trc cc cuc tn cng DoS. 4.3.3 Nhn xt v cc iu kin gii hnS dng m phng mng trc tuyn c quy m ln, chi tit (MicroGrid) nghin cu cc mng Proxy vi cc ng dng v cc cuc tn cng DoS thc cho thy rng cc mng Proxy c th cung cp hiu qu vi kh nng m rng tnh phc hi trc cc cuc tn cng DoS mc c s h tng v bo v ng dng. 4.4 Ngn chn su Internet v cc iu kin4.4.1. M hnh ly truyn v pht hin tn hiu virus/su

Mt vi m hnh ton hc c s dng m t s ly truyn phn tn su. Cc m hnh ly truyn virus :

M hnh Staniford: M hnh nh lng lan truyn su do Staniford cng cng s xut xc nh t l my b nhim a. M hnh Kephart v White: Trn c s s dng h thng kiu nt trong th phng trnh vi phn m t s pht trin t l my i(t) b ly nhim theo thi gian .Thut ton vt chn (Footprint) Rabin c s dng ti mi nt mng tnh cc khi ni dung trong cc phn ti ca gi tin.

4.4.2. Phng chng v ngn chn su Internet v cc iu kinNghin cu sinh dng h thng m phng quy m ln vi thut ton Rabin tnh s lng su phc v thm d. Mng m phng thit lp vi s lng ln my c nguy c b tn cng v mng cc b. Chn mt nt ca cc mng cc b thit lp nt ca mng phng th kt hp.

Kt qu m phng cho thy lan truyn su khi cc nt ngn chn c lp v kt hp trong trng hp cc nt ring l thu thp 100 tn hiu su cng mu trc khi n lc gi tin ch ra rng vi cc nt ngn chn c lp, hnh vi lan truyn su khng b hn ch (so snh vi khng c bt k vic ngn chn no) nhng, i vi phng th trong mng kt hp, cc hnh vi lan truyn phn ln b hn ch.4.5 Kt lun chng

Trong chng ny, nghin cu sinh nghin cu kh nng chng li cc cuc tn cng ca mt mng Proxy, ng thi nghin cu cc c tnh ca h thng phng th DoS da trn mng Proxy trc nhng cuc tn cng ny nm chc rng khi no tnh i khng l c th s dng, xem xt kh nng mt mng Proxy c th chng li nhng cuc tn cng nh th no v thit k mt h thng da trn mng Proxy vic phng th mt cch hiu qu.

Nghin cu sinh nghin cu v m hnh chung thu gi mt di rng h thng phng th DoS da trn mng Proxy. M hnh ny xc nh mt b yu t ph hp vi tiu chun trong h thng da trn mng Proxy v s tng tc ca chng.

Chng ny cng trnh by mt k thut phng chng tn cng hp tc phn cp bo v h tng mng chng li tn cng mng . KT LUN V NH HNG NGHIN CU TIPLun n trnh by cc kt qu nghin cu v c tnh ha lung lu lng IP nhm mc ch x l, phn b lu lng Internet, bo v an ninh thng tin mng v chng tn cng mng din rng; nhng vn ny ngy cng tr nn cp thit i vi cc nh cung cp dch v mng do s pht trin khng ngng cc lp ng dng mi hi t trn nn IP. Qua , nghin cu sinh rt ra kinh nghim thc tin thu c khi thc hin cc ti nghin cu khoa hc ti c s v nhng ng gp mi th hin cc cng trnh cng b trn cc tp ch nh sau:

1). Tng qut, h thng ha v c tnh ha lu lng IP v pht trin, phn loi cc c tnh theo dch v i vi lung lu lng trong trng hp ca mt nh qun l, cung cp dch v vin thng c th.

2). xut p dng l thuyt h thng vo bi ton phn b lu lngs dng kt qu u tin c cung cp bi c trng ha lung lu lng IP internet ti mt nt mng ca nh qun l, cung cp dch v vin thng.

3). H thng ha v gii php chng tn cng t chi dch v v ngn chn su Internet trn c s c trng ha lung lu lng IP xut vic xc nh gii hn ca m hnh s dng Proxy nhm mc tiu bo m an ninh mng.

4). xut gii php s dng ti nguyn thi gian thc (nh qun l, cung cp dch v vin thng v cc phn mm m ngun m) thc hin minh chng tnh ng n v mt l lun.Nhng vn cn nghin cu tip :1.) i vi c tnh ha lung lu lng IP Internet, nghin cu sinh thy cn thit tin hnh nghin cu b sung thm nhng chiu hu ch khc trong vic biu din lung lu lng pht hin chnh xc hn s khc bit gia c tnh th hin nhng lung tin ph hoi, dch v chuyn dng vi nhng lung tin dch v truyn thng v b sung thch hp vo nhng phn mm m ngun m.

2.) Xc nh mc u tin ca dch v qua c tnh ha lu lng nhiu chiu tm ra h cc iu kin rng buc ng thi theo khng gian (trong c min tn s, min thi gian i vi lc tng thch, i vi iu khin cng sut, v phn b tn s thng qua iu ch tng thch, v.v) nhm vo nhim v m bo cung cp cht lng dch v (QoS) ca cc cng ngh truyn thng th h tip theo trong mi trng phn tn din rng.

3.) Nghin cu p dng quyt nh mm (Soft decision) vo nhim v bo m an ton thng tin v an ninh mng thu c nhng gii hn rng buc lm c s l lun xut m hnh bo v thch hp.

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