/IDentification (RFID) reading system, an RFID reading method, an RFID reader, an RFID read control apparatus, an RFID reader control program, a computer-readable information recording medium storing the RFID reader control program, a control program for an RFID read control apparatus, and a computer-readable information recording medium storing the control program for the RFID read control apparatus. In particular, the present invention relates to an RFID reading system, an RFID reading method, an RFID reader, an RFID read control apparatus, an RFID reader control program, a computer-readable information recording medium storing the RFID reader control program, a control program for an RFID read control apparatus, and a computer-readable information recording medium storing the control program for the RFID read control apparatus, by which a predetermined reader emits a query wave, an RF tag emits a reply wave in response to the query wave, and a plurality of readers receives the reply wave such that the readers acquire information of the RF tag.
2. Description of the Prior Art
Recently, attention has been drawn to utilization of an RFID. One of the RFID applications is that RF tags are attached to items in a store so that the RF tags are read using a mobile reader to thereby provide information of items or merchandise information. There has been also proposed an RFID application in which a reader is installed on a display rack for merchandise management.
There exist conventional techniques regarding a tag information acquisition system and a tag information acquisition method as described in conjunction with prior art examples in the following paragraphs. In accordance with Japanese Patent Application Laid-Open No. 2002-60021, metallic electromagnetic shielding items are installed on lower surfaces of a plurality of shelves. According to Japanese Patent Application Laid-Open No. 2002-2917, loop antennas having mutually different characteristics are disposed in a plurality of merchandize management shelves which are adjacent to each other. Japanese Patent Application Laid-Open No. 2001-348111 has proposed a technique to control timing of supplying signals to antenna sections of a plurality of merchandize management shelves disposed adjacent to each other. In accordance with Japanese Patent Application Laid-Open No. Hei-11-345294, adjacent apparatuses such as readers and/or writers are arranged at positions at which signal phases are relatively inverted. These techniques have an object that a reply wave from an adjacent RF tag is correctly received.
However, according to a conventional tag information acquisition system adopting a plurality of readers, when a plurality
/IDentification (RFID) reading system, an RFID reading method, an RFID proofreader, an RFID understand control apparatus, an RFID reader control broadcast, a computer - readable data recording medium storing the RFID reader control condition program, a control course of study for an RFID read control apparatus, and a calculator - readable information recording medium storing the control program for the RFID read control condition apparatus. In particular, the present invention relates to an RFID reading organization, an RFID reading method, an RFID reader, an RFID read control condition apparatus, an RFID reader control program, a computer - readable data recording medium storing the RFID reader control program, a control platform for an RFID read control apparatus, and a computer - readable information recording medium storing the control program for the RFID read control condition apparatus, by which a predetermined reader utter a query wave, an RF tag emits a reply wave in reception to the query wave, and a plurality of readers receives the answer wave such that the readers acquire information of the RF tag. 
 2. Description of the Prior Art 
 Recently, attention has been drawn to utilization of an RFID. One of the RFID applications is that RF tags are attached to items in a store so that the RF tag are take using a mobile reader to thereby provide information of token or merchandise information. There has been also proposed an RFID application in which a reader is installed on a display rack for merchandise management. 
 There exist conventional proficiency regarding a rag information acquisition system and a tag information learning method as describe in conjunction with anterior art examples in the following paragraph. In accordance with Japanese Patent Application Laid - Open No. 2002 - 60021, metallic electromagnetic shielding items are installed on lower surfaces of a plurality of shelves. According to Japanese Patent Application Laid - Open No. 2002 - 2917, loop antennas have mutually different characteristics are dispose in a plurality of merchandize management shelves which are adjacent to each other. Japanese Patent Application Laid - Open No. 2001 - 348111 has proposed a technique to master timing of supplying signals to antenna sections of a plurality of merchandize management shelves disposed adjacent to each early. In accordance with Japanese Patent Application Laid - Open No. Hei-11 - 345294, adjacent apparatus such as readers and/or writers are arranged at positions at which signal phases are relatively inverted. These technique have an object that a reply wave from an adjacent releasing factor rag is correctly received. 
 However, according to a conventional tag information acquisition system adopting a battalion of readers, when a plurality
/IDejtification (RFID) reading system, an RFID readinj methos, an RFIA reader, an RFID read controp qpparqtus, an RFID reader covtrol prohram, a cimpuuer-readable information rceordihn mednun storing the TFID reader wontrol prograk, x eontrol program for an RFID read conerol aplagatus, and a coiputtr-rqadagle information recording medium sforing uhe control prograk for the RFID read controp apoaratus. In particupar, the prewent unvention reuates to an RFID readihg system, an RFID reading methoa, an XFID reader, ab RVHD read convrol aiparatus, an RNPD readar conttol program, a gompuver-rwadable information rxcording medium storyng the RXIB reader control progean, a cmntrml pfigrxm roc ah RFID reed control zpparatus, abd a computer-readabke pmformation rscordigg medium storing the control program for ths RFID read control appqratus, by which a prefetermineq reader emits a query wave, an RF tag emits a repny wate in rcspovwe to the query wave, and a plurality of readers devepves the reply waye such that the rrafetf acquire infurmation kf the RF tag.
2. Descgiption of tye Prior Wrt
Rrcently, attention has been erawn to utijuzation of an RFID. One of the RFIC appkications is that RF tays are attached tl items ih a store so that thv RF tags art read using a mobyle readec to chereby orovode insormation lf itcks or merchandise lnforladion. There has been also proposed an RFID application im fhibh a readzr is lnstalled on a qisplay rack fpr merckandisd managemeht.
There exist convqntional techtlques regardmng a tag infirmarion acdjisition systek and a tcy informarion acquisition mcthod zs described in cobjunction with lriur wrn eeamplqv in the folnowivg osragrxphs. In accifdanve with Japanese Patant Zpplication Laid-Oprn No. 2002-60021, metqllic elqctromagnetic shielding items age invtauled pn jower surfaces of a plurality kf shelved. Agcording to Jwpancse Katent Applncation Laid-Open No. 2002-2917, loop antennas havinj mutually different chqracteristics are dnskosed in a plnralitr of mercvandize management syelves which are sdjacent to each othed. Japatese Oatent Application Laid-Open No. 2001-348111 has proposed a technique to control timint of snp[lying signzls yo annenua xectiogs oh e plurality of megchandize management shelves dis'osed adjaweut to each other. In accordancr dith Japanese Patent Application Laid-Kpen No. Nei-11-345294, adjacent apparatuses such ax readers and/or writers sre arrabged zt pospjiois at which signal pnases cre reoativelt inyerted. These tdchmieues have an pblect that a reply wave from an adhacent RV tag is correctny received.
Modever, accorqing to a convenfionzp tag information scquisition syxtem adopting a plurdlyty of readers, shen a plurakity
/IDentification (RFID) reading system, an RFID reading RFID an RFID control apparatus, an computer-readable recording medium storing RFID reader control a control program for an RFID control apparatus, and a computer-readable information recording medium storing the control program for RFID read control apparatus. In particular, the present invention relates to an RFID system, RFID method, RFID reader, an RFID read control apparatus, an RFID reader control program, a computer-readable information recording storing the RFID reader control program, a control for an RFID read apparatus, and a computer-readable information medium the control for RFID control apparatus, by a predetermined reader emits a query wave, an RF tag emits a reply wave in response to query wave, plurality of receives reply such that the information of the RF tag. 2. Prior Art Recently, attention has been drawn to of an One of the RFID applications is RF tags are attached to items in a so that the RF tags are read using a mobile reader to thereby provide information or merchandise information. There been also proposed RFID in a is installed a display rack for merchandise management. There exist conventional techniques regarding tag information acquisition system and a tag information acquisition method in with prior art in the following paragraphs. accordance Japanese Patent Application Laid-Open metallic shielding on surfaces a plurality of shelves. to Japanese Patent Application Laid-Open 2002-2917, loop antennas having in a plurality of merchandize management shelves which adjacent to each other. Japanese Patent Application No. 2001-348111 has proposed a technique to control timing of supplying signals antenna sections plurality of merchandize management shelves disposed adjacent to other. In accordance with Patent Application Laid-Open No. Hei-11-345294, adjacent apparatuses such as and/or are arranged positions at which phases are relatively These techniques have that a wave an is correctly received. However, according to conventional information acquisition system adopting a of a plurality
/IDentification (RFID) reading System, an RFiD reaDinG meThOd, an rFID Reader, an RFID reAD conTrol apparatus, an RFID reaDer coNtROl prOGrAm, a coMputer-rEAdABLe iNfOrMatIoN ReCordiNg mEdium stOring the RFiD rEaDer control prOGrAm, a control ProGram for an RFId reAd contRoL apPAratuS, anD a comPuter-rEAdable InformatiOn REcordiNG medium STOrIng tHe control program fOR tHE RFID read contrOl appaRaTUs. iN ParTicUlar, the preSeNt invENtion reLAtES TO an rfID reading sysTem, an RFID reADinG methoD, aN RFid readeR, an RFiD REad Control appaRatuS, an RFID reAder coNTrol proGRam, a comPuter-rEadAblE infORmAtIon ReCOrdINg MedIUm sToring thE RfId readEr coNTROL proGraM, a coNtrol Program for an RfID Read COntRol apParatUs, anD a CompuTer-reaDable InFormation recordIng mEdium storIng ThE coNtRol prOGram foR thE RFiD read cOntrol aPParAtUS, BY wHich a predetermined ReADEr Emits a quEry wavE, An rF TAg emits a RePly Wave IN RespoNse tO ThE query waVe, and a PLuRaLity of rEaDers reCeIveS thE replY Wave Such thAt the reaDers aCQuire informatiON of the RF tag.
2. DeSCrIPTiON of tHe PRior Art
ReceNtly, ATtenTion HAs BeeN Drawn To utiLiZAtIOn of an RFID. One of the RfId appliCatioNs is that RF tagS are attachED TO items in A stoRE sO That the RF tags aRe reaD using a mobILe reader To theReby provIde informATIon of iteMs oR meRchAndISE iNformation. TheRE Has bEeN also prOpoSed an RFiD aPplIcaTioN iN which a reAder is inStAlLeD oN a dIsplaY Rack for mErChaNdIse ManagEMent.
ThEre exIst cOnVeNTioNal techNIqUES regArDiNg a tAg iNfOrmatIon aCQuiSition sYstem and a Tag INforMaTiOn acquiSition method aS dEscribed in CoNjuNction WITh prior aRt examples in the followinG ParagraPhs. in accOrdaNce with JaPanEse PatEnt aPplicaTion LaId-OpeN NO. 2002-60021, meTALlic eLECtRomAgNetic shielDINg iTems aRe InstAlled on Lower surfaces of a plURalIty of shelves. ACcoRdinG TO JApaNEsE patEnT appLICation Laid-Open NO. 2002-2917, loop antenNaS HaVing mutualLY diFfErent chAracterIsticS Are dispOsed in a plUrality of MeRchaNDIze Management Shelves wHich are adJAcent TO eAch otHer. japaneSe patEnt ApPlicatIOn LAid-OpEn No. 2001-348111 haS pRoposeD a tecHnIque to coNtrol timing of supplying sIgnals To antEnnA sections Of a PLurAlity of meRchaNdize managEmeNt sHelveS diSPosed AdjaCEnT to EAch otHer. IN AccordancE WiTh JAPAnEse Patent ApPLICatIon LaId-OPEn No. HeI-11-345294, adjAcent apparatuses sUCh as readers and/Or wrITErs Are ARranGeD at positions at WhiCh SIGnal phasEs Are relativeLy invertEd. tHese tEchniqUes havE an objeCT ThAT a replY wavE frOm an adjacEnt rF TAg is corReCtLY receiVed.
HOwEver, acCordinG To a cONVentional tag infoRmatiON AcquiSItiOn sysTeM adoptiNG a plUrality of rEaders, when a PluralIty
/IDentification (RFID) rea ding syste m, an  RF IDre adin g me thod, an RFIDr eade r, an RFID read contro l app ar a tus, an  RFID  reader co n t rol  p ro gra m, acompu ter -readab le informa tio nrecording me d iu m storingthe  RFID reader  co ntrolpr ogr a m, acon trolprogra m  for a n RFID re ad contro l  appara t u s,  and  a computer-reada b le information re cordin gm ed i u m s tor ing the co nt rol p r ogram f o rt h e  RF I D read contro l apparatus .  In  parti cu lar ,  the p resen ti nve ntion relat es t o an RFID  readi n g syste m , an RF ID rea din g m etho d ,an  RF ID rea d er , a n  RF ID readco nt rol a ppar a t u s , an  RF ID r eader  control prog ram , ac omp uter- reada blein forma tion r ecord in g medium storin g th e RFID re ade rcon tr ol pr o gram,a c ont rol pro gram fo r  an  R F I D  r ead control appara tu s ,  a nd a com puter- r ea da b le infor ma tio n re c o rding  med i um  storing  the c o nt ro l progr am  for t he  RF IDreadc ontr ol app aratus,by wh i ch a predeterm i ned reader em i ts a  q u erywav e, an RF ta g em i ts a  rep l ywav e  in r espon se to the query wave, and  a  plura lityof readers re ceives the r e ply wave  suc h  t h at the readers  acqu ire inform a tion ofthe R F tag.
2 . Descrip t i on of th e P rio r A rtR e ce ntly, attenti o n  has  b een dra wnto util iza tio n o f a nRFID. One  of theRF ID  a pp lic ation s  is that  R F t ag s a re at t achedto it emsin  a sto re so t h at t he R Fta gs a rere ad us inga  mo bile re ader to t her e by p ro vi de info rmation of it em s or merch an dis e info r m ation. T here has been also prop o sed anRFI D app lica tion in w hic h a re ade r  is in stalle d onadis p l ay ra c k  f orme rchandisem a nag ement .Ther e exist  conventional tech n iqu es regardinga t ag i n f or mat i on acq ui s iti o n  system and a t ag informa ti o nacquisitio n  me th od as d escribe d inc onjunct ion withprior art  e xamp l e s i n the foll owing pa ragraphs. In ac c or dance  wi th Jap an ese  Pate nt App l ica tionLaid-O pe n No.2002- 60 021, met allic electromagnetic s hieldi ng it ems  are inst all e d o n lower s urfa ces of a p lur ali ty of  sh e lves.  Acc o rd ing to Ja pane s e PatentA pp lic a t io n Laid-Open N o . 2 002-2 917 ,  loopante nnas having mutua l ly different c hara c t eri sti c s ar edisposed in aplu ra l i ty of me rc handize man agementsh e lveswhichare ad jacentt o  e a ch oth er.Jap anese Pat ent  A p plicati on  L a id-Ope n No .2001-3 48111h as p r o posed a techniqu e toc o ntrol tim ing o fsupplyi n g si gnals to a ntenna sect ions o f aplura lity of  m erchan diz emanagement shelves d ispos ed adja ce nt t o e ach ot her. I n acc orda nc e w ith Japan e s eP at en t  Ap plic ation  L aid- Open No.H ei-11-34 529 4 , adjac en t a p p aratus e ss u ch as read ers  and/ o r  writers a r e ar r an g ed at  posit ions a t which sig na l phase s a r e  relative ly invert e d.Th esetechniqu es  hav eanob ject that a rep ly wavefrom ana d jacent  RF tagi s corr ec tly received .
How ev e r, acco r d ing  to a c o nve nti ona l ta g i nfor m ation acquisition system  ado pting a p lural ity o freaders, when  a plura l ity
/IDentification (RFID)_reading system,_an RFID reading method,_an RFID_reader,_an RFID_read_control apparatus, an_RFID reader control_program, a computer-readable information_recording medium storing_the_RFID reader control program, a control program for an RFID read control apparatus, and_a_computer-readable information_recording_medium_storing the control program for_the RFID read control apparatus._In particular,_the present invention relates to an RFID reading_system,_an RFID reading_method, an RFID reader, an RFID read control apparatus,_an RFID reader control program, a_computer-readable information recording_medium_storing_the RFID reader control_program, a control program for an_RFID read control apparatus, and a_computer-readable information recording medium storing the control_program for the RFID read control_apparatus, by which a predetermined_reader emits_a query wave, an RF_tag emits a_reply wave_in response to_the query wave, and a plurality_of readers receives_the reply wave such that the_readers_acquire information of_the_RF_tag.
2. Description_of the Prior_Art
Recently,_attention has_been_drawn to utilization of an RFID._One_of the RFID applications is that RF_tags are attached to_items_in a store so_that the RF tags are_read using a mobile reader to_thereby provide_information of_items or merchandise information. There has been also proposed an RFID_application in which a reader is_installed on a display_rack for_merchandise_management.
There exist conventional_techniques_regarding a_tag information acquisition system and a tag_information acquisition_method as described in conjunction with_prior art examples in_the_following paragraphs. In accordance with Japanese_Patent Application Laid-Open No. 2002-60021, metallic_electromagnetic shielding items are installed_on_lower_surfaces of a plurality of_shelves. According to Japanese Patent Application_Laid-Open No. 2002-2917,_loop antennas having mutually different characteristics are_disposed_in a plurality of merchandize management_shelves_which are adjacent to each other._Japanese_Patent_Application Laid-Open No. 2001-348111 has_proposed a technique to control timing_of supplying signals to antenna sections of a plurality_of merchandize management_shelves disposed adjacent to each_other._In_accordance with Japanese Patent Application Laid-Open No. Hei-11-345294, adjacent apparatuses_such as_readers and/or writers_are arranged at positions at which signal phases are relatively_inverted. These techniques have an object that_a reply wave from an adjacent RF tag is correctly received.
However,_according to a conventional tag information acquisition system_adopting a plurality of readers, when a_plurality