1、 KSKSKSKS KSKSKSK KSKSKS KSKSK KSKS KSK KS KS X 3304 KS X 3304:2008 2008 10 31 http:/www.kats.go.krKS X 3304:2008 : ( ) ( ) () ()SJ ( ) : (http:/www.standard.go.kr) ： ： 1980 12 30 ： 2008 10 31 2008-0734 ： ： ( 025097262) (http:/www.kats.go.kr). 10 5 , . KS X 3304:2008 Information technology Telecommu
2、nications and information exchange between systems High-level Data Link Control(HDLC) procedures Frame structure 1 ( HDLC .) . , ( .) (pattern) . 2 ( FCS .), (address) . KS X 3305 . 2 . . ( ) . KS X 3305, ISO 3309, Information processing systems Data communication High-level data link control proced
3、ures Frame structure 3 HDLC . ( ). 01111110 8 8 a16 32 01111110 a . , . . KS X 3304:2008 2 01111110 8 8 16 32 01111110 4 4.1 . (station) . . 1 . 4.2 , . , . 4.3 . . a) . b) . 4.4 . . . 4.5 , FCS 2 5 “1”(FCS 5 .) “0” . 5 “1” “0” . 4.6 (FCS) 4.6.1 FCS 16 32 . 16 FCS . 16 FCS , 32 FCS . 1 FCS 8 . 2 FCS
4、 A . KS X 3304:2008 3 4.6.2 16 16 FCS a) b) 1 . a) xk(x15 x14 x13 x12 x11 x10 x9 x8 x7 x6 x5 x4 x3 x2 x 1) , x16 x12 x5 1 k FCS , . b) FCS , x16 x16 x12 x5 1 , 1 , , x16 x12 x5 1 1 16 FCS . 1 . x16 x16 x12 x5 1 . . 0001 1101 0000 1111 (x15 x0) 4.6.3 32 32 FCS a) b) 1 . a) xk(x31 x30 x29 x28 x27 x26
5、x25 x24 x23 x22 x21 x20 x19 x18 x17 x16 x15 x14 x13 x12x11 x10 x9 x8 x7 x6 x5 x4 x3 x2 x 1) x32 x26 x23 x22 x16 x12 x11x10 x8 x7 x5 x4 x2 x 1 k FCS , . b) FCS , x32 x32 x26 x23 x22 x16 x12 x11 x10 x8 x7x5 x4 x2 x 1 1 , , x32 x26 x23 x22 x16 x12 x11 x10 x8 x7 x5x4 x2 x 1 1 32 FCS . 1 . x32 x32 x26 x2
6、3 x22 x16 x12 x11 x10 x8 x7 x5 x4 x2 x 1 . . 1100 0111 0000 0100 1101 1101 0111 1011(x31 x0) 4.7 , , ( 20 ). . FCS . KS X 3304:2008 4 4.8 (time fill) 714 “1” . . 4.9 ( 16 FCS 32 32 FCS 48 ) . . 7 “1” . 8 “1” . 5 5.1 , 256 . “0” . . . “1” . , “1” . 128 . 5.2 2 . KS X 3305 . 6 6.1 . 6.2 11111111 . . .
7、 KS X 3304:2008 5 . , . . ( ) . 6.3 00000000 . . , . 6.4 1 1 . . a) . b) . , . . , . . KS X 3304:2008 6 A ( ) (FCS) “0” ( 16 FCS ). a) d) FCS . a) FCS 0 . b) 16 FCS . c) FCS . d) FCS FCS . a) d) FCS . a) FCS 0 . b) 16 FCS . c) FCS FCS . d) FCS FCS . FCS FCS 0 . 16 1 . FCS FCS 0 . 1 16 . FCS 4.6 0 .
8、FCS 16 . FCS , FCS FCS 16 . FCS FCS a) d) . a) FCS k G(x) . k G(x)16n M(x)KS X 3304:2008 7 G(x) x5 x3 1 101001 . b) , ( ) G(x) . c) FCS , G(x) . d) 16 P(x) P(x) x16 x12 x5 1 . FCS x16G(x) xk(x15 x14 x13 x12 x11 x10 x9 x8 x7 x6 x5 x4 x3 x2 x 1) P(x) R(x) 1 . )()()()()1()(141516xPxRxQxPxxxxxGxk+=+KKx1
9、6 G(x) G(x) 16 FCS 16 . x16G(x) xk(x15 x14 x 1) x16G(x) 16 . “1” . R(x) 0 . FCS x16G(x) n M(x) x16G(x) FCS . M(x) x16 xn(x15 x14 x 1) P(x) . )()()()()1(FCS)(14151616xPxRrxQrxPxxxxxGxxn+=+KK Rr(x) “0001 1101 0000 1111”(x15 x0) . Rr(x) . )()(16xPxLx L(x) x15 x14 x 1 . P(x) . FCS )(xR L(x) R(x) L(x) .
10、FCS FCS FCS 0 . )()()()()(16xPxRrxQxPxLx+= L(x) , Rr(x) FCS . x16L(x) . 0)()()(1616=+xPxLxxLx x16L(x) FCS . FCS 135513 7017 (02)60094114 (02)600948878 http:/ Korean Agency for Technology and Standards http:/www.kats.go.kr KS X 3304:2008KSKSKS SKSKS KSKS SKS KS SKS KSKS SKSKS KSKSKS Information technology Telecommunications and information exchange between systems High-level Data Link Control(HDLC) procedures Frame structure ICS 35.100.20
