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" M" " " " %# W# # #B #l # $ $$9"9"9N"9"Y"v""""u"j"b"W"O"D":"1"'""v"Y "9"9"92 "9"" " " " " " # # # ## ## ##  ## -# -# -# -# 8# @# J# S# ]#h#9W#W#W#%#""W#W#W###`\!i\!i \!iiEENE4& "(*,*("zk] L=,EEETcs6 .=K\EqEqNEq4~&zk]L=~,qEqEqEqTecZsNE;5556 50,,,05;E.N=ZKe\qEEE4&*2;;;6 ;?CCC?;z2k*]L=,EE>ETcs ....=K\oo o.oo o.,,V,,;&  ;;   &;&,\\V\\aaxnanaccnx\!3!3!3(3!3     ii i i-9-9 -99     h&&&&))&''%'$'5'C' T'c'q'$'(',',','('$'''  ((,(=(L(Z(k(z((((((((())&)4)C)X(X( X((,F,F,F0,@,F,F11 11&"&"&&"  p[&S?SJ[Vp]cc]VJ?"&",  f,[9[JfV]]VJ9,"""SS""jp[~STST"~"pf~[[[[~SS"1S*SVllllSeSe""SS $[[& [SvSv""}}[[Y[Y[Y[YSS""[Y[}}}}tt"n"nStSt"""SS""BtnjjOn1t  1t1t16 t1nOnt11& 111  t1:    VwlddllwddBBBHHlBlBVwlddllw     DD& DDJJD6 wdY O:   r  ldO:   ???CC??]wVwCOCOCOCYSS& SS"S [ [= [f{5?EE?E5""  5?ELL{Ef5[[ f{ 5?ELLEE5   5?LRR{LfE[5SS [[pLpLp Lp9[|S|SV|S|""S|SSSSSS    rrrlBlHlr$ $ $ $% $% $ $$$ U% U% &U% _% x% % %%%1%c%%%x%_%U%H%B%;%c;%1B%H%U% U% e% r% % %%1%c%%r%e%U%H%B%cB%1H%U% %%#%% % % & &&& && % % % %%1%c%%%%& &&&&&%%%%%%c%1%%D&D&D&&&J&=& =& =& 7& g&& & g&=& & & & ' ' & &&& ' ' &' ' ' ' '''1'c'''''''''c'1''' ' ' ' ' ''1'c'''''''c'1'' ((((((.( 9( R( c( i(i(c(1^(<R(F4(Y((c"(n((((9(R(c(o(c(^(R(9((("("(((n4(cR(Q^(Fi(1o(o(c( R( 9( (( (((2 (( ( ( ( ((((( ( ( ( ( b( ( ((1(c((((((((((((((((c(1(() ) & ) ) ))))))) *** *`*`* * *C*C* I* I*** * &* * * * * * *<*Y******}*Y}*<* * * * * * * * *<*Y********Y*<* * * ** **y+y+. y+y+ + ++ ++ + ++y+ , , , , , , ,W,W,W,W, \, \,W,,,2 ,,, , , , , , ,,,,W,QW,QW,Q,Q,FW,F Y ,\  yxdddy  yO  * #\\  PRu\P#Printed: September 4, 1991>Page `p(#dFile: 11RFR18E,   XX g ` #\  PButHP#SEPTEMBER 1991`,(#[DOC.: IEEE P802.11/91 99 ă    yxbdddy @  yxXdddy  yO  * #\\  PRu\P#Printed: September 4, 1991>Page `(#PPower Drain ConsiderationsRypinski@  #2P'P#; IEEE P802.11 ă (802 LAN Access Method for Wireless Physical Medium    #Xl2P0kXP#yxZdddy  R  DATE: ` ` August 29, 1991`X(#X REVISED: September 4, 1991    l yx dddy  Pi  TITLE: ` `  POWERDRAIN CONSIDERATIONS FOR  PR ` ` FULL TIME AND SLEEP MODE RADIO RECEIVERS  $ yx^ dddy  R   l  AUTHOR: ` ` Chandos A. Rypinski, ` `  &Chief Technical Officer ` ` LACE, Inc.`(#[Telephone: 707 765 9627 ` ` 921 Transport Way`-(#ZFacsimile: 707 762 5328 ` ` Petaluma, California 94954 USA   yx;dddy #\2PP# BACKGROUND There is concern that a continuouslyoperating receiver may use more battery capacity than is acceptable. One alternative is a "sleep mode" where the receiver is "awakened" by a timing and sampling schedule or by the presence of carrier. If it is awakened by signal present, enough of the radio to know that a signal is there must operate continuously. Before accepting that the receiver should include a sleep mode and a particular awakening method, it is necessary to know the unavoidable power drain for a data output and a carrier detecting (only) receiver. It is possible that keeping powerdrain low is more feasible than accepting the system performance loss from receivers that only listen parttime. CONCLUSION It is believed that the estimated or better receive mode power drain may be attained with sufficient effort. These levels are sufficiently low, much less than a flashlight bulb, that no effort should be invested in methods to provide a logical sleep mode for the signal path of the Station receiver. Table of Contents`!(#oPageă X` hp x (#%'0*,.8135@8: