1、 KSKSKSKS SKSKSKS KSKSKS SKSKS KSKS SKS KS 2001 4 9 http:/www.kats.go.krKS X 4302 2 (LAN)2： KS X 4302 2： 2006 (2011 ) X 4302 2： 2006 : ( ) ( ) : (http:/www.standard.go.kr) ： ：1993 12 20 ：2001 4 9 ：2011 12 29 2011-0657 ： ： ( 02-509-72635) (http:/www.kats.go.kr). 10 5 , . ICS 35.110 KS (LAN) 2： X 4302
2、 2： 2006(2011 ) Information processing system Local area networks Part 2： Logical link control 1. 1.1 ( LAN .) ( LLC .) , . 1. . ISO 8802 2 Information processing systems Local area networks Part 2： Logical link control 2. . KS X 3305 KS X 3306 KS X 3002 1. LAN . KS X 4302 2 (LAN) 2： KS X 4302 3 (LA
3、N/MAN) 3： CSMA/CD KS X 4302 5 (LAN/MAN) 5： 1.2 . a) LLC LLC ( 1.1 ) . (KS X 4302 3, KS X 43025) . LAN ( MAC .) . 1.1 LAN LLC MAC PHY X 4302 2： 2006 2 b) LLC ( 3 ), MAC LLC 3. . LLC . MAC LLC MAC . . LLC LLC . LLC . . c) LAN (LSAP) 4. . LLC LAN . LAN LLC 2 (5. ). 1) 1 (7. ) . . “ ” . 2) 2 (8. ) KS X
4、3305 KS X 3306 . . “ ” . LLC 2 . . 1) L . 2) II . , . , ( ) , . . , . 2. 2.1 . a) DA： (destination address) b) DSAP： (destination service access point) c) LAN： (local area network) d) LLC： (logical link control) e) LSAP： (link layer service access point) X 4302 2： 2006 3 f) LSDU： (link layer service
5、 data unit) g) MAC： (medium access control) h) MSAP： MAC (MAC service access point) i) MSDU： MAC (MAC service data unit) j) PDU： (protocol data unit) k) SA： (source address) l) SAP： (service access point) m) SDU： (service data unit) n) SSAP： (source service access point) 2.2 . a) (DASP) (SSAP) LLC P
6、DU . PDU LLC PDU LLC . 1 . b) ( ) DSAP LLC DSAP ( 1) LLC . c) ( ) DSAP LLC . “1” . d) PDU LLC , LLC . e) PDU LLC C/R “0” PDU f) PDU DSAP SSAP , DSAP LLC . 1) , SSAP LLC . 2) , SSAP LLC . g) PDU . LLC I PDU, TEST PDU UI PDU . h) (MAC) LLC , . , , . i) (PDU) MAC MAC . PDU 3 2 1 . PDU , . j) PDU . 1 PD
7、U LLC . k) PDU LLC C/R “1” PDU l) (LLC) 1 LLC PDU PDU PDU PDU . LLC . 1) PDU 2) 3) PDU PDU X 4302 2： 2006 4 4) LLC KS X 3305 . 3. LLC LLC , MAC LLC LLC LLC . ( ) , ( ) . ( ) ( ) . 3.1 2 ( ) . ( ) . . ( ) , ( ) ( ) . . . . . 1 . . 3.1 4 . a) (REQUEST) ( ) . b) (INDICATION) ( ) ( ) . (REQUEST)(CONFIRM
8、)(RESPONSE) (INDICATION) X 4302 2： 2006 5 ( ) . c) (RESPONSE) ( ) . d) (CONFIRM) 1 ( ) . 3.2 . 4 , . X 4302 2： 2006 6 a) b) c) d) e) f) g) 3.2 X 4302 2： 2006 7 3.1 LLC LLC . . . 2 . a) (LSDU) . , . b) , , , . LSAP . . LSDU . , . . . . 3.1.1 . a) 1) . DL UNITDATA DL UNITDATA DL UNITDATA LSDU LLC . DL
9、 UNITDATA LSDU LLC . b) 1) . DL CONNECT DL CONNECT DL CONNECT DL CONNECT DL CONNECT LSAP LSAP LLC . DL CONNECT LSAP LLC . DL CONNECT LLC . DL CONNECT DL CONNECT LLC . X 4302 2： 2006 8 2) . DL DATA DL DATA DL DATA LSDU LLC . DL DATA LSDU LLC . 3) . DL DISCONNECT DL DISCONNECT DL DISCONNECT LLC . DL D
10、ISCONNECT LLC . 4) . DL RESET DL RESET DL RESET DL RESET DL RESET LLC . DL RESET LLC LLC . DL RESET LLC . DL RESET DL RESET LLC . 5) . DL CONNECTION FLOWCONTROL DL CONNECTION FLOWCONTROL DL CONNECTION FLOWCONTROL LLC DL DATA LLC . DLCONNECTION FLOWCONTROL DL DATA LLC . 3.1.2 3.1.1 . . , . source_add
11、ress destination_address MAC (SA) ( ) (DA) LLC SSAP ( ) DSAP . . data LSDU . priority . priority LLC MAC MAC (3.2 ). reason . X 4302 2： 2006 9 LLC . amount LLC . . a) DLUNITDATA 1) . 2) . DL UNITDATA (source_address, destination_address, data, priority) source_address destination_address LSAP . dest
12、ination_address . data LSDU . Priority , . 3) 1 LSAP LSDU LLC . 4) . 5) LSAP . , 3.2 c) . b) DLUNITDATA 1) . 2) . DL UNITDATA (source_address, destination_address, data, priority) source_address destination_address LSAP . source_address LSAP LSAP LSAP . data LLC LSDU . priority . 3) LSDU LLC . 4) .
13、5) LSAP . data DL UNITDATA data . c) DLCONNECT 1) . 2) . DL CONNECT (source_address, destination_address, priority) source_address destination_address LSAP . priority . X 4302 2： 2006 10 3) LSAP LLC . 4) LLC LLC LLC . 5) 3.2 f) . d) DLCONNECT 1) . 2) . DL CONNECT (source_address, destination_address
14、, priority) source_address destination_address LSAP . priority . 3) LLC . 4) DL CONNECT , DL DISCONNECT . e) DLCONNECT 1) . 2) . DL CONNECT (source_address, destination_address, priority) source_address destination_address LSAP . priority . 3) LLC . 4) LLC LLC LLC . 5) DL CONNECT . DL CONNECT . f) D
15、LCONNECT 1) . 2) . DL CONNECT (source_address, destination_address, priority) source_address destination_address LSAP . priority . 3) DL CONNECT LLC . . 4) . 5) . X 4302 2： 2006 11 g) DLDATA 1) . 2) . DL DATA (source_address, destination_address, data) source_address destination_addrcss LSAP . data LLC LSDU . 3) LSDU LSAP LLC . 4) LLC , LSDU . 5) DL DATA DL DATA priority .
