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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm

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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm

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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
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Chương 3:939:95;<=>?@1Q_71U,6
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3,S,472BZONOG3LI<;c}>;FR4Qy,R<
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
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1.2.1 Khái niệm về mạng viễn thông hiện tại
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g <IfXMc;G_MOGc;GD(Q$%(.
IQ>;,S1OG>c;G_MOGc;G_M1OG>c;GD(
Q$4(<IfXMG;,4+F;,SBOG
MX;,S72BZ_(R<$
g <If+FBCB;X1<If;=1O-c;G'QKQ(
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3G3>M<If+FBCUYQ.IQ>OG<If+FBC(UDQ$
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
<If+FBCUYQ.IQ>BL+,4,43G(UR3>M$
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<$
Hình 1.1. Các thành phần chính trong mạng viễn thông
g &L+,4+FIQ>+FK<OGOL<$
g <If;=1>M>M+F1(;>M'(iQH'
(Y'c;G#\k$
,O@'MOLyX;,S;f•Q,7Q&MOL
3G_1(/XM;,S1O-QI(;,4
+FBC$/;,SU8GF:UOGR<SUO-(;,4+FBCM>
G(:UMR(Q$

1.2.2 Các đặc điểm của mạng viễn thông hiện tại
%(MOLM;X3GM_(+.3ƒ'E
O-‚3>MBfOZL3MY:_3>MMOL+.I;X
UZOZBfOZ;$
g &M030HB;Xm(IE;B,-BMRW;?;,S?>(I
I•?QB>€$1;_+F+::U•P!;<|I„7€$
g &M;>ML_'vN3G#t•#3Qt3B030U>00+O0€
m;8L<;,S71>(OGXMm1X
M;>ML_#$
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
g &M+F713(MXM;X+Q>;c713KQ
((YBQ+.Q>ExQk$OG1+F713X
MR.BQ+.(Q>Ek$"
g %(Y+FAX+F0>|(+FI7OL
<'  +F  DQ    1  M  +F  A  (U  %\  •%>
\0Q030O7>€I(U;+Z>s+FDQ1O'
QvN3G+FA+<U•+0+>QBQ770€$
g +>UMO6DQ'713KQ((Y;,S+Q>;cLDQ
M  Z  I_  ]\  •]>Q3  \+0Q  0b>+R€  G  c  <  :  3G  M
o0+0'>R07OG>R0d$
>O@'+,-RAXMOL<-['/Q=AX
3f72U(+XxQ(MM$
g kwOF;_BfOZM;>M1;f'M;>MB
;_OGM+F713$
g kwOF;_R…@MXM'M+FBC'M
+@U'MI(>OGM;I_$
1.2.3 Những hạn chế của mạng viễn thông hiện tại
,U8Ym+.'QF3>MMR(Q7>7>
M$&‚M3M.=U,6U(U<R<'75H:'O@G'I5>B,r

R(Q$,O@'1MOLMF,S;XG
DQ+N3G(;s;X7Q
g qwD5+>O  I5>B,r'O@Gy, 72  BZG
.$G.7†+>_MRLXQ7ƒ>(M
R(72BZ$
g &sR('MOLQ;,S<R<Z;YRQ(
BfOZ>M3Gx<$
g q<+/c;G;_DF3G>(GRQ(=,UZ_
>G>GOG>(G:Uc;G$^FGRLK3G5
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
7EM+Q>(GRQ(';sI3GKGRQ(J'
Gv1F4QOGFIMR18:UOGEBZ(
U=F-$
g %(c;GXMR.;?RQ(<3OG+m.3M@
;1O-=xQR(G$
^E+,-AAU(+XxQMOLQ'(GRQ(
@:+z7_ZKQM#OGM#{3G99H5+Q$
%=_67mM=B::U>NBfOZ•,6g71'I
~UgI+_'6I5g;QU,6'}€;XOD53W@U+'5
UYI5>B,rOGO@G';4‚+S(BfOZxQMQ$
GQ OP>>EF
1.3.1 Định nghĩa
&MOL<7QF.NR(Q'lM,
g &M;QBfOZ•:UF3>MBfOZR(Q€$
g &M_Z•‚+S>53,3,S>MOGBK3':+/M_Z€$
g &MU8U1•U8U1YL>NU=2+>M€$
g &MF3-U•M;,SU8+QF3-UME;_3@U
,‚+SQQOA_R11:,+>M&€$
%>-Q'sB(cEOLD1<OG(G:U<

IfOL+.<-;F+:DQ8OG.EOF<3,SU(+X
[,OC,Q_;f•QZXOGYH(G>>M[$
>;';f•QM[.m+.;8RLXIQ>G<N<OF
M<7Q',X,6;13GR(:R;F@U;<
[$
,O@'XH0ML<7Q3G7YSUM>M#
•x<BQ+.R…@&€O-MXM•BQ+.R…@
`#„\&€$X+F5:5(BfOZO1xQ#;4y
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
X@U_3,SBK3+:3-OG>M`#'4;X5~(
sxQ#$.'[RL‡;6=3G7_ZKQ>MOGBK
3Gv3G7_ZKQ+FBCDQOGL'KQM1;f
OGB;_$
1.3.2 Đặc điểm của mạng thế hệ sau
&M[);s;XY
• ;>1/R>22S
%(R1ExQc;G+F1QG(U=2;_3@U'
(U=2;,SU8Q0>E,6EOGU(+X_(
;_3@U$+>;'Q>BOGQ>EKQ(I_U@U5BQ+.(
.ˆ,6E$
U8(3G>MOLO1B=B=;0>,--'
GRB>QXEOG>=BfOZ;XcSU(U=2R
cEM3,-$.ˆ>(Q>EKQ(U=2X1
L(M:AR(Q$
• /RTATUO.>V5WXYTUO.91>Z5[/\9OB
2/B
-;s;X
g %Q(BfOZO-;FRX_N
g %Q(_NO-+F5$

&Z.YxQQ(3G3G>BfOZ7;_3@UO-M'
_(3>MOGD5O:UBfOZ$.IQ>X
I1+YOGH(;f;s+,BfOZxQA'RLDQ8;<M
+F5BfOZOG3>MA;=1$
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
/R2X=24YTZ>72[>A>8>]>
&MLQ'B3GMOL'M(YQM
+FA(U;FRLX3:_+>(M;3GF5;XH8
B67mM=L$,=;8'O-7U(+XxQL
`#',4Q@:+n+G3GMOL'M(YOG
M+FA(U1yYSU+>_M`#1:'
;3GH<3-G,4Q,4N3GzBSUIQM{$
0R24T/^Y>>8RXR>_OR45`T
/^5=5:986
[Q>E`#<;?+mGQ>EEBZOMOGI9;=;,S
72BZ3G67m>(M;QBfOZ'sBMOCvI:3S7>
O-XMR.OFR5c+S3,3,S>MOG:U:
3,SBfOZ;5I5>>713$.'1;_;c-Q
+><-`0+0O-7U(+XxQ(.ˆm7T7-
R9UZK<7G$
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
Hình 1.2. Topo mạng thế hệ sau.
1.3.3 Nguyên nhân xây dựng mạng thế hệ sau
^E+.DQ;XGRQ(BfOZ'K3WB>YBC-OH8
BM<7Q[3G
g [54Q+Qf+,4>(LOG(BfOZ-
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g @>(G:U<If'(G:UM'Q>

KGU(+XU=F•FBƒ>+>O@UU=F-P
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0>(R1;?;,Sˆ>($
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OFs3>$
1.3.4 Sự triển khai từ mạng hiện có lên mạng NGN
Trang 14
Mạng hiện tại
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
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;63-'Y:>G=',4;,S;F@U0>_3>M(Q>E
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g [U5R5‚+S5>(BfOZxQM`0+0OGxQ
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
Hình 1.3. Nhu cầu tiến hoá mạng

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XM€OGPM`0+0L_•‚+S.:3,SBfOZ
j>€$
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 q557(:3,S'57(3‚OGI5>O'RLUZM
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
;Q;,S+XRQ_(>GB';F;y•Q3GO
XBf7QM[;?I9;=$
EQ3GX;cM;,4BG•M+FBC€$2BZcM
+R<YSU>s;_3@U'X;<M`#>s\&'+72BZ
XMF;X;FRX3OG:UBfOZ$2BZU,6E
GX5D<O:;F9T+>XMR.$
Hình 1.4. Sự hội tụ giữa các mạng
Ga ]>V2>EF

%>;<Q'M<7QOC3GH,-U(+X-ƒ',Q_R<
fYEG>xQ].L<-`pOF:+/xQ$F
?OL3-;? ;,Q  +QLA:+/  M<7Q,\3Q03'
o+77>'>+03'007']0'o%'}
Trang 17
./$01
./$
./$2$34
./$56(7
Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
APLAG':+/M-;s;X3GIQ>(3-U
7Q
g ]-UR<1•\077‹+Q7U>+„%>+0€
g ]-UR<1+QQ3-U+FL•&0BQ€
g ]-U;FRX•%>+>3€
g ]-UD53W•&QQ00€
+>;'3-U;FRX+:UEMUO-F3>MQ>E'R5,6Y
KQ(<IfxQ?3GO:;F;Q;,S(GRQ(DQ8$
Hình 1.5. Cấu trúc mạng thế hệ sau ( góc độ mạng)
k0HwP;_RB>QOG:UBfOZALA:+/M<
7Qv.3-UEBZBfOZ$
+>L+,4U(+XM+QA7T+:FGU=QQR
B>Q+>3-UEBZBfOZ$
Trang 18
./$89
./$01
./$2$34
./$
./$56(7
:#%;<*)

:#%;<*)
:#%;<*)
Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
Hình 1.6. Cấu trúc mạng và dịch vụ NGN (góc độ dịch vụ)
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
Hình 1.7. Cấu trúc luận lý của NGN
q<+/M[72BZXM>5>MOGBK3$U8Q
(R1OK9xQc;GQG(3-UM+.+T'(3-UG3.
R<O-QDQ(Q>Bm.ˆ$
1XM[;,SU8GI13-U+.IQOAYSU
G_1,LXMR.Q3-UEBZ'3-U
;FRX'3-U+FL'3-U+@UOG+F5$%(Q>Bm7(
IKQBfOZOG+FBC>UwU(BfOZ-;,S;,QOG>Q'
BBGŒKGRQ(XN3Q(G:U<If1:>
P3-U+>LAM[$
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
1.4.1 Lớp truyền dẫn và truy cập
6>X;Tb
Lớp vật lý  +FBCDQO-R…@wUR.I,-7DQe&
;,S72BZ$
Lớp 2 và lớp 3
+FBC+.M3n•>+00b>+R€BQOG>R…@XM>:
5(BfOZO-:3,SBfOZj>‰0>.=>P3>MBfOZ$
\&Q`#„&#]X;,S72BZ3GF>+FBC+.M3n;X
;5I5>j>$
&M3nX_M]\QM;,4+Z$
%(+>0+72BZmI.M3nR3,3,S3-',S3M'R3,3,S
:U'7bg+>0+X;5@3LExQK+>0+G$

g Thành phần:
 %(/XM„d>0+•`#„\&Q`#„&#]€'(X
MR.xQM#'R…@+F5Y3G`#Q
`#„\&$
 %(1XM'1;f<_N$
g Chức năng:
 ]-U+F5+>:+/M[IQ>5E
+FBCOGEXM$
 ]-U+FBCR5‚+S(Ej>R(Q>
_BfOZOG>(BfOZR(Q$R53,
+K3M(7RH5+Q+.M•RY,-'1;_';_+A
>?'•3:OGŽ0+>UwU'};1O-MXM
ŒIL';_+A>?;1O-MXMR.&€$
]-UEBZ7T;,Q+Q(.=OF3+F5OG7T
(.=;$
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
6>X\9
Lớp vật lý
g K<%(U;'H];Q72BZ$.+>,63Q
+FBCDQe&'#t•#Q77O0tUQ30b>+R€7TB=B=<
,<OGf+,4H]'>B0(UB=B=~U3M$
g L<LB;_*L[&>s%&\'+@UOL
<1;f'O$
Lớp 2 và lớp 3%L`#7T3GF>M+@U$
g Thành phần:
 #=+@U(<If+@U;OQ+vQ>B;XR<
1(<If;=1OG>MDQ1M>MO(U
;'(UDQ>sOL<$
 %(<If+@UYSU•`\€$

 .IQ>X72BZNR…@+@U•,6'71'&'
\&'`#'}€;X+@UOG>MBfOZ[$
g Chức năng:
 %:U(R<1KQ.IQ>;=1OGM;,4+Z
•_3-U+FBC€DQcQ><U&[eYSU$
 &M[R<1O-=<(<If;=1ˆOGRL
ˆ,(<If+H:;QBfOZ';>M`#'(Y
#%'c;G_I_#k';>M#t';>M71`'B
;_OL<'B;_O'OL<1;f'>]'>`#'}
1.4.2 Lớp truyền thông
Thành phần:
g <Ifm3-U+FL3G(c+FL•&[*&0BQ[Q0bQ€
IQ>
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
g %(c+@U\[•\077[Q0bQ€R<1KQM3nO-M
+@U'd[•d07B0Q3[Q0bQ€R<1M3nO-M.IQ>M
G$
g %(cQ><U[•+R[Q0bQ€R<1KQM3nO-M
#„`'e[•e+03077[Q0bQ€R<1M3nO-MB;_'
}
Chức năng:
g ]-U+FLR5,6Y(R…@+@UR(O-R…
@XM`#Q\&mM;,4+Z$Q(R('
3-UGf+(X;c(3>ML+,4•lM,
#'i+Q0d03Q']\'OL<'}€7QL+,4+FBC
;,S(UBZ+.M3nOG,S3M$
g 4;'(/XM•\&‹`#€OG(1+FBC7T
EXM';f<_NKQ(.IQ>xQ
3-U+@UB,-7;FRXxQ(<If_3-U;FRX$

1.4.3 Lớp điều khiển
Thành phần:
g ]-U;FRXIQ>(1;FRXGGU=Y3G
>a7bvN3G&0BQ[Q0bQ%>+>330+Q%Q33\0;,SR<1
O-(GU=R(;XR<1_NQD53W;fQ‡`#,
[e•Q3[Q0bQ€'&•&0BQ0+O0+€'i•i0Q+00+O0+€'\
•\UU3Q>0+O0+€$
g 0>&i•&30+O0bi>+€'3-U;FRX=;,Sc
E0>RX>B30OGXIQ>_71I_;FRX;_3@U$Y
BZ    (  I_  ;F  RX  +.  >  ( Bf  OZ  >M„I(>    71  !'
\&„%'`#„&#]'}
Chức năng:
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
g ]-U;FRXOZR<1;X:U(BfOZL71P
;=1;<;=1O-I:R‰3>MQ>EOGI(>G>$%ZX'3-U
;FRX
 ^f<3,3,SKQ(R1XM$
 <3@U.=';F‡OGQ;c(R<1>s(3'
;FRX79UH<U?•3QI03QUU€KQ(Q>Bc$
 #8Ic3,3,SOG(‡.:3,S;1O-‚R<1
•Q‚3€OG(7(;FRX;X;5I5>j>$
 (>;=1P(+R<'(c+>R<1O-3-U
0BQ$1R.OG3M(L71OF<_N';
4(5I(>$
 @LI(>P(cOGXLG
;<(GU=YSU+>3-U;FRX$
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Đ ti: Điu khiển tắc nghẽn trong NGN GVHD: ThS. Trần Bá Nhiệm
Hình 1.8. Cấu trúc mạng chuyển mạch đa dịch vụ

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RX$4(Q>Bm.7(IKQBfOZOG+FBC';F
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1.4.4 Lớp ứng dụng
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