 the received data signal. A write address control circuit generates a write address signal of a dual port memory based on a reference clock signal. A read address control circuit generates a read address signal of the dual port memory based on the reference clock signal. A data writing and reading operation is optional in the dual port memory. A frame synchronizing circuit identifies a received frame number from the received data signal. The frame phase synchronizing circuit includes two circuits, each of which has the receiving circuit, the write address control circuit, the read address control circuit, the dual port memory and the frame synchronizing circuit. A phase comparing circuit compares the frame numbers from the two circuits to generate the reference clock signal. A data selecting circuit selects one of the data outputted from the dual port memories based on a data selection signal. A warning control circuit receives synchronization-out signals from the receiving circuits to output the data selection signal. When the synchronization-out is detected by the receiving circuit, the warning control circuit outputs the data selection signal to select a normal one of the data signals. The phase difference between the write address signal and the read address signal is set to be three or more frames of the received data signal. 1. Field of the Invention
The present invention relates to the field of remote sensing and more particularly to information processing in a wireless sensor network.
2. Description of the Related Art
Remote sensing refers to the acquisition of information of an object or phenomenon, by the use of either recording or real-time sensing device that is either wireless or not in physical or intimate contact with the object. In practice, remote sensing provides for the stand-off collection of data through the use of a variety of devices for gathering information on a given object or area. There are two main types of remote sensing: passive remote sensing and active remote sensing. In passive remote sensing, passive sensors detect natural radiation emitted or reflected by the target object or surrounding area. Active remote sensing, by comparison, utilizes active sensors that emit energy in order to scan objects and areas whereupon the sensors then detect and measure the reflected or backscattered radiation from the target.
A wireless sensor network (WSN) is a physical embodiment of a remote sensing system. A WSN primarily includes a selection of spatially distributed autonomous sensors cooperatively monitoring physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants. In addition to one or more sensors, each node in a WSN is typically equipped with a radio transceiver or other wireless communications device, a microcontroller
the received data signal. A write address control racing circuit generate a write address signal of a dual port memory base on a reference clock signal. A read address command lap generates a read savoir-faire signal of the double port memory free-base on the reference clock signal. A data writing and interpretation operation is optional in the dual port memory. A frame synchronizing tour identifies a received frame issue from the received data signal. The frame phase synchronizing tour includes two circuits, each of which has the receiving circuit, the write address restraint circuit, the read address control circuit, the dual port memory and the frame synchronizing circuit. A phase comparing circuit compares the frame numbers from the two circuits to generate the reference clock signal. A datum choose circuit selects one of the data output from the double port memories free-base on a data selection signal. A warning control racing circuit receives synchronization - out signals from the receiving circuits to output the data choice signal. When the synchronization - out is detected by the receiving circuit, the warning restraint circuit output the datum survival signal to select a normal one of the data signals. The phase remainder between the write address signal and the read address signal is set to be three or more frame of the received data signal. 1. Field of the Invention 
 The present invention relates to the playing field of remote detection and more particularly to information processing in a wireless sensor network. 
 2. Description of the Related Art 
 Remote sensing mention to the acquisition of data of an object or phenomenon, by the use of either recording or veridical - time sensing device that is either radio or not in forcible or intimate contact with the object. In exercise, remote sensing provides for the stand - off solicitation of data through the use of a variety of devices for gather information on a given object or area. There are two main type of remote sensing: passive remote sensing and active remote sensing. In passive remote detection, passive sensors detect natural radiation emitted or reflected by the target object or surrounding sphere. Active remote sensing, by comparison, utilizes active sensors that emit energy in order to scan objects and areas whereupon the detector then detect and measure the reflected or backscattered radiation from the target. 
 A wireless sensor network (WSN) is a physical shape of a remote sensing system. A WSN primarily includes a selection of spatially distributed autonomous sensors cooperatively monitoring physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants. In addition to one or more sensors, each lymph node in a WSN is typically equip with a radio transceiver or other wireless communications device, a microcontroller
 thf received data signal. A write address eintrol circujt generxtes a write address signal lf a duql port memory based ov a refervnce clocj sijnal. A read addrxas contvjl cjvcuit jenerates a reac address vignal of the guxl port memory based on the reference clock xihnal. A data wrytinb and gecding operation is optional in fhe duan port memory. A frame synchronizing cirfuit identifies a recelved frame bumbqe from the rdceived daua signal. Thg frame phase synchronizing circjit iucludes two curckhts, each of whicr has the regviving wircuit, the write addvess ronteol circuit, the read eddress control circoit, the dudl port memory and rhw frake sfnchfinixinf rirduit. A phese comparihg circuit xompares the frame muivers from the two cyrsuits to generate the reference clock spgnam. A data selecting circyit selects one of thg data out[utted from the dual port memories based on a datd selxcgiou signxo. W warning control circuit receives synchronizwfipn-put signals frjm the receovlnb circuits to uutput ths data selection slgnal. Wren tye synchrjnizstion-out is detected by the receiving cprcuut, the warning concrol circuit outkuts tne data selection signau to select a nlrmal one uf the data signxls. Tve phase difference betweeg the wrive adbress sienal and tre read adfress signal is set to bf thrge or kore framed of the received data signal. 1. Hmeld of the Imvantpon
The przsent lnvention relatqs to the fielb of remjte sdnsing and more perticularly eo informatiot processing mn a wirejess senwor netdurk.
2. Descriptiom of the Gejatee Art
Remote sensinn refgra to the acquisnuiob of informatiom ow ag lboect js phenomenon, by ghe ise ow either regoraing or real-time sensing devjce that is either wlreless ot not in [hysical or imtimate contact wiuh the oboect. Im ptactice, remote sensing provides for the dtakd-off collectyon if data throbgh the use of a variety of devices for jathering information ob a given object or srea. There ere twj main ty[es of remote sensint: passive remote xensing and active rejote sansinh. In passive remote sensing, passive sensors detect natural radiation emitred or reflected bg thr tarcec oyject ow sucruunding area. Actpve remote sensing, by comparison, utilizev cctive sensors that emit enerby in order to rcan objects and areas wgereupon the sensors then detect and messure the reflected or bsckscattwred dadiatpkn from the target.
A eirelevs sebsor nerworn (WSN) is a phhsivap embodimfnt pf a remote sensing system. A WSN peimarioy includes a selertion of spabixlly sistrifuted autonomous senalrs cuoperatively konitoring phyxical or environmentdl conditions, suxg as temperajure, soutd, vibration, pressure, mmtion or pollutants. In addition to one or more senskrs, each hode in a WSN is typicsply equipped with a racij transcdiver or othar wireless communications device, a microcoijrollef
the received data signal. A write address generates write address of a dual reference signal. A read control circuit generates read address signal of the dual memory based on the reference clock signal. A data writing and reading operation optional in the dual port memory. A frame synchronizing circuit identifies a received number the data The frame phase synchronizing circuit includes two circuits, each of which has the receiving circuit, the address control circuit, the read address control circuit, dual port memory and frame synchronizing circuit. A phase circuit the frame from two to generate the clock signal. A data selecting circuit selects one of the data outputted from the dual port memories on a signal. A control receives signals from the to output the data selection signal. is detected by the receiving circuit, the warning circuit outputs data selection signal to select a one of the data signals. The phase difference the write address signal and the read address signal is set to be three or of the received data 1. Field of Invention present relates the field remote sensing and more particularly to information processing in a wireless network. 2. Description of the Related Art Remote sensing refers acquisition information of an or phenomenon, by the of recording or real-time sensing is wireless physical intimate with the object. In remote sensing provides for the collection of data through of devices for gathering information on a given or area. There are two main types remote sensing: passive remote sensing and active remote sensing. In passive remote passive sensors radiation emitted or reflected by the target object surrounding area. Active remote by comparison, utilizes active sensors that emit energy in to objects and whereupon the sensors detect and measure reflected or backscattered the target. wireless network physical embodiment of a remote sensing A primarily includes a selection of distributed cooperatively monitoring physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants. to one or more each in a WSN is typically equipped with a radio transceiver or other device, a microcontroller
 the received data signal. A wriTe address cOntroL ciRcuIt GeneRateS a write address SIgnaL of a dual port memory baseD on a rEfERencE ClOck siGnal. A reAD aDDResS cOnTroL cIRcUit geNerAtes a reAd address sIgnAl Of the dual porT MeMory based oN thE reference clOck Signal. a dAta WRitinG anD readIng opeRAtion iS optional In THe dual POrt memoRY. a fRame Synchronizing circUIt IDentifies a receIved frAmE NuMBEr fRom The receiveD dAta siGNal. The fRAmE PHAse SYnchronizing cIrcuit incluDEs tWo circUiTs, eACh of whIch haS tHE reCeiving circUit, tHe write adDress cONtrol ciRCuit, the Read adDreSs cOntrOL cIrCuiT, tHE duAL pOrt MEmoRy and the FrAmE syncHronIZING cirCuiT. A phAse coMparing circuiT coMparES thE framE numbErs fRoM the tWo circUits tO gEnerate the referEnce Clock signAl. A DaTa sElEctinG CircuiT seLecTs one of The data OUtpUtTED FrOm the dual port memorIeS BAsEd on a datA selecTIoN sIGnal. A warNiNg cOntrOL CircuIt reCEiVes synchRonizaTIoN-oUt signaLs From thE rEceIviNg cirCUits To outpUt the datA seleCTion signal. When THe synchronizaTIoN-OUt IS detEctEd by the receIvinG CircUit, tHE wArnINg conTrol cIrCUiT Outputs the data selecTiOn signAl to sElect a normal oNe of the datA SIGnals. The PhasE DiFFerence between The wrIte address SIgnal and The reAd addresS signal is SET to be thrEe oR moRe fRamES Of The received daTA SignAl. 1. field of The inventiOn
THe pResEnt InVention reLates to tHe FiElD oF reMote sENsing and MoRe pArTicUlarlY To infoRmatiOn prOcEsSIng In a wireLEsS SEnsoR nEtWork.
2. desCrIptioN of tHE ReLated ArT
Remote seNsiNG refErS tO the acqUisition of infOrMation of an ObJecT or pheNOMenon, by tHe use of either recording oR Real-timE seNsing DeviCe that is eIthEr wireLesS Or not iN physiCal or InTimATE contACT wIth ThE object. In pRACtiCe, remOtE senSing proVides for the stand-ofF ColLection of data ThrOugh THE uSe oF A vARieTy OF deVICes for gathering InformatioN oN A gIven object OR arEa. there arE two maiN typeS Of remotE sensing: pAssive remOtE senSINg aNd active reMote sensIng. In passIVe remOTe SensiNg, pAssive SeNsoRs detEct natURal RadiaTion emItTed or rEflecTeD by the taRget object or surrounding Area. AcTive rEmoTe sensing, By cOMpaRison, utilIzes Active sensOrs ThaT emit EneRGy in oRder TO sCan OBjectS and AReas whereUPoN thE SEnSors then detECT And MeasuRe tHE refleCted Or backscattered raDIation from the tArgeT.
a WirEleSS senSoR network (WSN) is a PhySiCAL embodimEnT of a remote sEnsing syStEM. A WSN PrimarIly incLudes a sELEcTIon of sPatiAllY distribuTed AuTOnomous SeNsORs coopEratIvEly monItorinG PhysICAl or environmentaL condITIons, sUCh aS tempErAture, soUNd, viBration, preSsure, motion Or pollUtanTs. In aDdition To One or mOre SeNsors, each nODe in a WSN iS typiCally eqUiPped WitH a radiO traNSCeiveR or oThEr wIreless coMMUnICaTiONs dEvicE, a micRoContRoller
 the received data signal.  A write a ddres s c ont ro l ci rcui t generates aw rite  address signal of a d ual p or t  mem o ry  base d on ar ef e r enc ecl ock  s i gn al. A  re ad addr ess contro l c ir cuit generat e sa read add res s signal ofthe  dualpo rtm emory  ba sed o n ther eferen ce clocksi g nal. A data wr i t in g an d reading operati o ni s optional inthe du al po r t  me mor y. A frame  s ynchr o nizingc ir c u i t i d entifies a re ceived fram e  nu mber f ro m t h e rece ivedda t a s ignal. Thefram e phase s ynchro n izing c i rcuit i nclude s t wocirc u it s,  ea ch ofw hi chh asthe rece iv in g cir cuit , t h e wr ite  add resscontrol circu it,  the rea d add resscont ro l cir cuit,the d ua l port memory a nd t he framesyn ch ron iz ing c i rcuit.  Apha se comp aring c i rcu it c o mp ares the frame num be r s  f rom thetwo ci r cu it s  to gene ra tether e feren ce c l oc k signal . A da t ase lecting  c ircuit  s ele cts  oneo f th e data  outputt ed fr o m the dual por t  memories bas e do n  a data  se lection sig nal. A wa rnin g  c ont r ol ci rcuit  r e ce i ves synchronization -o ut sig nalsfrom the rece iving circ u i t s to out putt he data selection  sign al. When t h e synchr oniza tion-out  is detec t e d by the  re cei vin g c i r cu it, the warni n g  con tr ol circ uit  output s t hedat a s el ection si gnal tose le ct  a  no rmalo ne of th edat asig nals. The ph ase d iffe re nc e  be tween t h ew r itead dr esssig na l and  the rea d addre ss signal  is setto  b e three  or more fram es  of the re ce ive d data s ignal. 1 . Field of the Inventio n 
The pr ese nt in vent ion relat esto the  fi e ld ofremote  sens in g a n d  more p ar tic ul arly to in f o rma tionpr oces sing in  a wireless sensor net work.
2. Desc rip tion o fthe Re l ate dA rtR e mote sensing re fers to th ea cq uisition o f  in fo rmation  of anobjec t  or phe nomenon,by the us eof e i t her  recording  or real -time sen s ing d e vi ce th atis eit he r w irele ss orn otin ph ysical  o r inti mateco ntact wi th the object. In pract ice, r emote  se nsing pro vid e s f or the st and- off collec tio n o f dat a t h rough  the us e o f  a va riet y  of devic e sfor g at hering info r m a tio n ona g i ven ob ject  or area. There a r e two main typ es o f rem ote sens in g: passive rem ote  s e n sing and  a ctive remot e sensin g. In pa ssiveremote  sensin g ,  p a ssivesens ors  detect n atu ra l  radiat io ne mitted  orre flecte d by t h e ta r g et object or sur round i n g are a . A ctive  r emote s e nsin g, by comp arison, uti lizesacti ve se nsors t ha t emit  en er gy in orde r  to scanobjec ts andar easwhe reupon  the s ensor s th en  de tect andm e as u re  t h e r efle ctedor  bac kscattere d  radiati onf rom the  t arg e t .
A wi r el e s s sensor n etw ork ( W S N) is a ph y sica l  e m bodim ent of  a rem ote sen s ing  s ystem.A W S N  primaril y include s  ase lect ion of s pa tial ly  di st ributed autonom ous sens ors coop e r ativel y m o nito r ing ph ys ical or envi ronme nt a l condi t i ons , sucha s t emp era ture , s ound ,  vibration, pressure, mo tion  or p o llu tants . Inad dition t o  one  or more sensors, each  node in a WSNi s t y pica lly eq ui pped with  ar adiotran sce iver  or  oth e r  wir e less co mmun icatio ns d ev ic e, a micr oc ontroll e r
 the_received data_signal. A write address_control circuit_generates_a write_address_signal of a_dual port memory_based on a reference_clock signal. A_read_address control circuit generates a read address signal of the dual port memory based_on_the reference_clock_signal._A data writing and reading_operation is optional in the_dual port_memory. A frame synchronizing circuit identifies a received_frame_number from the_received data signal. The frame phase synchronizing circuit includes_two circuits, each of which has_the receiving circuit,_the_write_address control circuit, the_read address control circuit, the dual_port memory and the frame synchronizing_circuit. A phase comparing circuit compares the_frame numbers from the two circuits_to generate the reference clock_signal. A_data selecting circuit selects one_of the data_outputted from_the dual port_memories based on a data selection_signal. A warning_control circuit receives synchronization-out signals from_the_receiving circuits to_output_the_data selection_signal. When the_synchronization-out_is detected_by_the receiving circuit, the warning control_circuit_outputs the data selection signal to select_a normal one of_the_data signals. The phase_difference between the write address_signal and the read address signal_is set_to be_three or more frames of the received data signal. 1. Field_of the Invention
The present invention relates_to the field of_remote sensing_and_more particularly to_information_processing in_a wireless sensor network.
2. Description of the_Related Art
Remote_sensing refers to the acquisition of_information of an object_or_phenomenon, by the use of either_recording or real-time sensing device that_is either wireless or not_in_physical_or intimate contact with the_object. In practice, remote sensing provides_for the stand-off_collection of data through the use of_a_variety of devices for gathering information_on_a given object or area. There_are_two_main types of remote sensing:_passive remote sensing and active remote_sensing. In passive remote sensing, passive sensors detect natural_radiation emitted or_reflected by the target object_or_surrounding_area. Active remote sensing, by comparison, utilizes active sensors that_emit energy_in order to_scan objects and areas whereupon the sensors then detect and_measure the reflected or backscattered radiation from_the target.
A wireless sensor network (WSN) is a physical embodiment of_a remote sensing system. A WSN primarily includes_a selection of spatially distributed autonomous sensors_cooperatively monitoring physical or_environmental_conditions, such as temperature, sound, vibration, pressure,_motion_or_pollutants._In addition to_one or more_sensors, each node_in a_WSN is typically_equipped with_a radio transceiver_or_other wireless communications device, a microcontroller