Real Time (3)


  
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Version 2 CSE, IIT Kharagpur

ROBOT

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CONTROLLER

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Version 2 CSE, IIT Kharagpur




 

 

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Version 2 CSE, IIT Kharagpur

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Version 2 CSE, IIT Kharagpur





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Version 2 CSE, IIT Kharagpur

Legend: MSAU: Multistation Access Unit

MSAU

MSAU MSAU

MSAU

MSAU

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Logical Ring

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:

Version 2 CSE, IIT Kharagpur

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Version 2 CSE, IIT Kharagpur

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Transmission Interval

‹n *0?>I/:+! (J­ j:+*'57:*'(U@;u:+A/*'(:V"4(+*'576">6 EO:V"%6 8,-*08+8H*05>6†w6^(!3:+Z4"%$28 Çi»C²±yµ#Æ» !h± p¶4» µ#»|´>»CÉU½_†w6g(+Q/*28R./:5>(5J157$)l^(+Q/!f(*0,9!p$0*'6 !f*28EJ*0ZS*0EJ!#Eg*06^(5iW/{J!=E*'6^(+!3:+Z[">$08=N]u_(R(Q/!8H(+"%:(R5%L!=Z>!=:@h*06^(!3:+Z4"%$cl ./:+*05>:+*v(U@P"%:+A/*'(:V"4(*05>6F*08-13">::+*0!=EP5>I/(i(+5BEJ!3(!3:+,-*'6 !g(+Q/!Q *'?7Q/!=8H(9. :*05>:+*v(U@P,-!=8+8+"%?>!g*'6F(Q/!6/!( T 5>:+xyNDu8-8H5S5>6G">8i./:*05>:+*'(U@ ">:A/*'(:V"4(+*'576r*28157,-./$'!3(!7lk(Q/!h6 5SE/!hQ "[ZS*'6/?(Q !hQ/*'?7Q/!=8H(./:+*'57:*'(U@o,-!=8+8">?>!9*08">$'$05 T !=Er(5(:V"%6 8,-*v(#Nh†w6B5>(Q/!=: T 57:+E 83lk(+Q/*28 8+1VQ/!3,-!p*06^Z75>$0Z>!#8s.C!3:+*05SE/*01f./:+*'57:*'(U@g">:A/*'(:V"4(+*'576;LM57$'$05 T !#E;AS@g,-!#88+"%?7!(+:+">6 8H,-*288*05>6"788HQ 5 T 6*06on*0? N (/N 

msb

lsb

N1 10

0

1

0

1

0

N2 16

1

0

0

0

0

N3 20

1

0

1

0

0

Priority bits

‹n *'?7I/:+! = ­ j:+*'57:*'(U@;u:+A/*'(:V"4(*05>6b‚]{/">,9. $'! `:*05>:+*v(U@o">:A/*'(:V"4(+*'576o(*0,-!h*08E/*'ZS*2EJ!=EB*'6^(+5W {S!#EB8*0m3!=ED8$'5>(+8=N9ORQ/!hEJI :+"%(*05>6r5>Ls!#">1VQP8H$05%(EJI/:V"4(+*'576B*28f(U@S./*01="%$0$'@o,h"7EJ! !#~7I<"%$J(+5!36 EJ&)(+5%&‡!36 E9./:+5>. ">?7"%(*05>6-EJ!3$2"[@X5>L<(+Q/!,-!=EJ*0I/,bN]†‡Ly(Q/!8H$05%(`8*'m=!*28],h">EJ!">6S@i8,-">$'$0!3:z(+Q "%6-(+Q/*283l7(Q/!=6-(Q/!./:*05>:+*'(U@ ">:A/*'(:V"4(+*'576r8+1VQ/!3,-! 57I/$2Eq6/5>( 5>:+xq8H*06 13!9"b157$'$0*28H*05>6q!=Z>!=6 Q/!=6r*'(5J131I :+8 57I/$2Er6/5>(fAC!hEJ!(+!=1(!=E|N9u8$'5>(8*0m3!9$0">:?7!3: (+Q "%6B(Q/*28 T 5>I/$2Eq$0!="7TEq(+5">6B*06 1T :+!="78H!i*'6P1VQ ">6/6/!3$z*2EJ$0!i(+*',-!hEJT I/:+*06/?b!3Z>!=:@o8$'5>(=T Nh\Z>!3:(Q !=8!-8$05%(+8=lk!3Z7!3:+@o6/5JEJ!9(:V"%6 8,-*v(V8 (+Q/!g./:+*05>:+*v(U@DZ4"%$0I/!;5%L*'(+8iQ/*0?>Q/!#8U(i./:*05>:+*'([email protected]!36 E/*'6/?B,-!=8+8">?>! T *'(QK,h8AªW :V8U(-">8X8Q/5 T 6ª*06Fn‹*'?6/!357I 8 (+:+">6 8H,-*288*05>6LM5>$0$'5 T 8  9$'57?>*21%l/"-6/5JEJ!p(+Q "4((+:+">6 8,9*'(+8" *h">6 E:!#1!=*'Z7!=8R" Î l/xS6/5 T 8_(+Q "4((+Q/!3:+!*28"4($0!="78U(5>6 !6/5JEJ!p(Q "%( *28RQ "[ZS*'6 ?-"9Q/*0?>Q !3:./:+*'57:*'([email protected]!36 EJ*06/?h,-!=8+8+"%?>!7l/"%6 EEJ:+5>. 8R57IJ(5%L‹(Q/!135>6^(!=6^(*05>6|N 



Î*

Version 2 CSE, IIT Kharagpur

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Transmission

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N2

Propagation Time N1

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Version 2 CSE, IIT Kharagpur

Priority

Packet Payload

P Header Mode bit

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Version 2 CSE, IIT Kharagpur

F

F

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low Bandwidth 802.5

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Edge router

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Î1,

Version 2 CSE, IIT Kharagpur

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Version 2 CSE, IIT Kharagpur

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Output Buffers fixed delay Switch Switch

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Version 2 CSE, IIT Kharagpur

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Version 2 CSE, IIT Kharagpur

Eligible Time computation

Active Msgs

1

D M U X

Hold Queue

2 n−1

MUX

Departing msg

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Delay Bound PreAhead

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Departure

Deadline

Holding Switch i

Delay Bound

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Eligible

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Priority level

Regulator 2

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