OSI Model ... network layer as shown in Figure 1. ... Data link layer controls a link management between two nodes, where each node can establish the link.
2010 Fifth International Conference on Systems and Networks Communications
£ Ý £ Þ £ ! " !#! $%& '( )* + , ,,-( Ý .( /0 1 2 & 2$ 0 0 !%2 %!!! '( )* +0, ,,-( Þ 3- ) 3- 4 %!$5 '( )* + ,,-(
! "# # " " "# " " $ # # % "" # " " & " # '()* " + # " " " $ ,- - $ $ -
OSI Model
Routing Table Management NETWORK LAYER
Routing Function
Link Management DATA LINK LAYER
PHYSICAL LAYER
Media Access Control (CSMA/CA)
Sleep Control Modulation (GFSK)
Main functions
6 ( ( 6 ( D =! &> =% >, 3 0 ( 0 A ,
7/ 8 ( 6 0 7 9.8, E / ( ( = $>, 3 6 (( F ))) %$5, ! ( C ( ( = 2>, = C> 6 B ( / 0 ( 6 7G1G8 ( =4> 6 9. (, / ( ( 6 6 3 , ( / 3 0 ( 6 6 6 , 06 6 6 0 6 ( 6 0 / 6, 9. 6 6 , / 0 ( 6 ( , (B 6
, / 6 7 ) 8 0 6 , 9 6 6 : ( 6 (( 0 6 , 6 6 6 (0 0 6 6 0 , ; (( 0 (( :( , ( 0 0 ( 6 6 ( 6 ( (, ? 6 ( @ A, (6 ( 0 ( B =C>, ( 6 ( 6 , 978-0-7695-4145-7/10 $26.00 © 2010 IEEE DOI 10.1109/ICSNC.2010.13
IRDT
46
Intermittent interval
Intermittent interval 'active'
node 1
‘sleep’
DREQ
node 1 RACK
node ID
node 2 Extension of active state
ACK
node 2 DACK
node 3 Send Data Start to send short preamble with node ID
node 3 Start to wait for ID
Send Data
time
time
!"#$!
Send-REQuest (SREQ)
, ? ( 6 9. 6 6 ( (0 , (( , 6 0 / 6 ( 6 / 6 0 (
=2> 0 G1G ( 6
, ( 0 0 ( , 9 (0 (
(, (0 ( (0 ( ( 6 0 0 A , 6 A (0 6 (0, (0 (B 6 6 ( 0, =%> 6 (0, 9 (0 ( 6 A , 9 ( 6 7 9.8 ( ( , ( 9., / (0 ( ( B ,
79J 9.8 ( 6 (( = #> 6 ( 0 A (0, ? (0 ( ((( F 7 /)H8 ( 6 3 2, 9 /)H (, .( 3 5 6 3 2 ( 0 B ( ,
( H = &>, / / ( 6 6 / A B: A , ( ( ( F , 6 6 ( 0 ( 0 6 (0 (( 0 , ( = 4>, 9 (( 0 (00 06 ( 0 , , +%+%, /
) / 0 6 ( 6 , 0 ( 0 0 0 ( (, ( ( 6 ( ( , 6 (( 0 (, ? ( 0, ) 6 ( Ì Ì , ( ( 6 ( (, E 6 6 ( ( ( ( ( (, ? ( 0 6 Ì
( 0 B , 9 ( ( 0 0 0 ,
9 9. ( / ( :( ( 6 7. 9K.98 ( , A 6 /)H ( 0 (, 3 5 6 :( , B 2 ( 5 /)H ( 5 6 ,
/ 0 A 0 6 0, 6 0, ? ( 0 6 0 ( , ? 0 0 6 Ì 0A 0, 3 0 A 0 6 Ì Ì , 0 ( 0 A 0 , 0 ( 6 0 0 :( , E6 6 0 ( : 0 , 9 ( 0 : ( (, E ( ( 6 A : 0 , 0 F 0 7 E8 0 0 6 ( 0A 0, E 6 6 0
( / 0 (, 9 0 /)H (, 9 0 ( 0 6 6 0 : 6 0 6 0 , / ( 6 ( 6 ( , ? ( ( 0 ( , ? @ ( A ( @ ( (A 7 0 Ì Ì ( 8, 0 , 6 /)H ( :( 6 3 C, B @6 A 0 6 (
48
1 Energy-consumption overhead ratio
1 Energy consumption [mAh]
Packet collection ratio
6 0.9
0.8
0.7 IRDT (0.1 s) IRDT (1.0 s) AX-MAC (0.1 s) AX-MAC (1.0 s)
0.6
0.5
5
IRDT (0.1 s) IRDT (1.0 s) AX-MAC (0.1 s) AX-MAC (1.0 s)
4 3 2 1 0
0
200
400 600 800 Sampling interval [s]
1000
1200
/0
IRDT (0.1 s) IRDT (1.0 s) AX-MAC (0.1 s) AX-MAC (1.0 s)
0.8
0.6
0.4
0.2
0 0
200
400 600 800 Sampling interval [s]
1000
1200
0
200
400 600 800 Sampling interval [s]
1000
1200
/0 2* ) * # 3 * 1 ) !"#$!4 * * ) 2
/10 !2 )
!5 %
) ) ) /"0 ) /"0 ) /8 %%0 9 /: 8%;: %;: 5%": 5 "0 9 /!&: !&: !&0 9 /!!0
C8 9 0 ( 0 ( , 0 ( 6 ( , 3 6 O)J ( , ? ( 6 ( O)J ( OEJ ( , 3 6 Ì , ;, $ ! / %8 8 ? 0 ( 0 / 6 0 ( 6 .PP, 6 ( F 6 !$$ 6 $$ ( 5 ( 0 6 ( , ? ( 0 1 ( 0 ( , : )) 6HE 6 @GA F : 5 : + ) : B!) 2 = = , 8 = :D : 2 >: GE HH> @ A F & : F : 8 & : F : B %2 8* ! * $! , 8 = :D ! : ! 66 @ A &K : C C: C* : $ 1: & 8 : ! & * = : 5: C * : B = $! # 1 1 ! :D 2 1 *) 477 7
