mobicom-camera-ready (1) -  a ` 9 ¨¦ B  9 ¨ ¤  E 0...

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'  9 !  ¦ ¨     ! ¤  1   ' ¨ 1 0  % '   ¦ ¨ %   ¢ !      ¨¦ ¤ ¢ #(@8©(76543§2((")($&"$¥#"§©§¥£¡ ABSTRACT A 9     ¨  9 q    ¨¦ B ¢  0 0 ¨ 1 0¦ ¨ 9   ¨ ¢ q  0   0 ¦  ' !    ¨ 0 9 ! rR)"“g(o(g©§x©‡cg„c"©Vgsp§"r§(r‚(#g5o§ƒr0 Loren Schwiebert Sandeep K. S. Gupta Jennifer Weinmann Department of Computer Science Wayne State University Detroit, MI 48202 Department of Computer Science and Engineering Arizona State University Tempe, AZ 85287 Department of Electrical and Computer Engineering Wayne State University Detroit, MI 48202 [email protected] [email protected] [email protected] Research Challenges in Wireless Networks of Biomedical Sensors 9¨ ¢0 0 1 q  %  !%9  rgsrsr(§p5©R(§5#(V"@#D†g(§)D(5(Yre¥r5(r0 ! h9! a `0 B 1 ˆ E0 i¨99¨ 9!0  A 0!9% 5Vr#V"¥2#©)i)V|(r5V¥§w@"rV3¥"§gY)g©§¥"f“ ¢ ! ' 'A •     9 9 B %  1  y !  ! 0 9  ' ¦  ¨   ¨¦ ¤ ¢     a     % ¨   ! % q  a !¦¦ ¨ `  B 0 0  ¨    9  1   !   % ¨¦ ¤ 0   ! 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B    ! %    i¦¦ ¨ B 0 B ¦¦ a h 9 ! a     1  9 !y `  0 ! %  !  ¨ C $#x§#5)©(|©‰7&t"§r§)"©cƒ£V§”5f‡(x"g" 0 1e+08 5e+08 0 0 200 400 600 800 1000 Number of cells 1200 1400 1600 1e+08 System Power Consumed (pJ/s) System Power Consumption (pJ/s) ¤ ¤6G ¨ C 0T0C @H# §) 1 H 1 R A1 G P ) X0 0H 6G X1  ¥ ' H ¤ A ¢6&GFB¥ FB(WV ) ¥¨ G ¤ 5 #T20(&%$" H #C ¦ 'A HG 1 ¢3 1) ' # 2e+08 3e+08 4e+08 6e+08 7e+08 Cluster−based approach Tree−based approach 8e+08 Power Consumed by 1600 cell network and distance between cells 9 G GCG) 1AD (WV 62B¦ YB ¢ 1 1 ) C Y PG 0R FA U!¦ §Y641 ) (&%$" ) 1 ¥1 V ` S ¦ 533 ' # repeated for each level in the tree solicit by parents 2e+08 3e+08 4e+08 5e+08 6e+08 channel repeated till any parent fails children address of children of the base station selected by the base station subscription by the Cluster−based approach Tree−based approach data transmission and control 7e+08 START ADDRESS1 ADDRESS2 ... ADDRESSn END 1 2 ... k subscription 1 2 3 .... k C Power Consumed by network where distance between cells is 10 mm § $ A0  ¨ 9  1 q  0 Bž  ¨  !  0 B % !y  ' ¨ 1 09 ! 1 B ¨  1 ` 9  '  a ! ‡§gYrT§25"‡§‡e#nfr§V€T3„|g§5gs§fR3(51  E h 9 ! a    ¦  ! ¢ ¨ 9 !y ` i q !¦ ! ¤ !   1   %   1   ¨ `  q  ¨ 9  ! 0 0 7†’V5†""§#¥“‰#"#7#‰§‰(§(5u§###5Yu#"rr"¥¢ E h9! a 0 1 y 7"5g! 0 %  ¤0 ¨ i  ¨ ¢  !  B ¤  9  1 9 !y d q  9    q  Š 9  B ¤ ¢ R(7rxsT”55§"‰"V§‰€–)5"V(§"§”‰V55¥#! œ ¤ $ § ¦ ¨ % 9  % ¦ Š y !    ¢  9 ¨ ¤  ‰ ` i  0 9  '  (©rR("‰x”(¥re„(83’trV#©58    ¨ d¦ ! ! 1 % … ¦ ¨ %   „gs§Y$&g"52 ¨ eg  ` i 09 '  ’trV3"§ƒ   ¨ CC¡   ! ¢ i¨ §5(((£u§#¥$(8  §¨ ¤  ¨  …   i ¨ }— i …  ¤  gYc§$(@€2t$ƒ7(f   ¨  …   i ¨ }— 9   0 ¦¦  % gY6§$(@€fV‡""©“2  )   ` 0 9  ¤ ¨ ¤  0  1   ¡ E¦ ! 9   ! % i q !¦ ! ¤ !  1 q B ! 9 1  i %   % j  9  a ! 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ACKNOWLEDGMENTS  ) A • ¨ ¢ 9  ' ! 0 ! %   ¨  ¢  y ¦ i9   ¨  q  C 0 ¨ 1 ¤ ¢  0 ! ¤ ! 9 t$gssV#gs‡(§p¥"Vt©nrRrg„D§"("r§§¥(pr7#$¤ Œ ˜¢ I Q U  ¨ a q ¨ 1 ©£”V&gwg§† #€t"…r§Vrp„()Vx„†r5(rb§¥ƒ#g¨ E y ¦ 9 !0  0    •    ¨ 09 !0  0 q  ! ¢ ¨  q    A 0 B 9  a ! ¤  C ¦ ¨ B ‘  !   ¨  1 9   0 B¦ %  1  q   ¨  ! 9   ¨ 0 9 ! 0   ‡§ƒV†e7u(""§)(€2§ƒV‡5©Vu5¥§"gYg2„br§Vr0 E0¨9%  #r(V§"o"5#x©"cw((")($kY§r“€„gs(5b§ i¦  ! ¦¦ a 0  % '   1 % B 0 9 !y   ¨ ¢    1 ` 0  q ¨  !  ¨¦ B ¤ ! ¤ ¦ 9 ! a  1  0  E   % B   9   ¦¦ a 0  !    ! ((@©e©§§7e©T5&ƒolV§5(T7†""cu5#"t5„(% ¦ ¨ %   ¢ %  ! 9 1 % q   %  99 ! % 9 !y 0 0 ! % ¦ ¨ %   ¢ `    y  9 0 g"5¥p©5#$Ro§"V(rg(|b‡#(”(©$¥ll5„Vƒ©4g#! iq A¦ !  1 %    1   %   E 0  !  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