TWI451790B - 產生用於無線網路之指紋之方法及裝置 - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
- G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
- G01S5/0252—Radio frequency fingerprinting
- G01S5/02521—Radio frequency fingerprinting using a radio-map
- G01S5/02524—Creating or updating the radio-map
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
- H04W36/322—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by location data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
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- Mobile Radio Communication Systems (AREA)
Description
本發明概言之係關於電信,且除此之外係關於用以產生用於一無線網路之指紋之系統及方法。
人們對無線資訊服務之需求已導致無線網絡之數量日益增長。CDMA2000 1x僅係一個提供通話及資料服務之無線網路之實例。CDMA2000 1x係一由第三代夥伴工程2(3GPP2)公佈之使用分碼多重近接(CDMA)技術之無線標準。CDMA係一允許多個使用者使用展頻處理共享一共用通訊媒體之技術。
在歐洲普遍使用之一競爭網路係全球行動通訊系統(GSM)。與CDMA2000 1x不同,GSM使用窄頻分時多重近接(TDMA)支援無線通話及資料服務。
某些其他無線網路包括使用適於e-mail及網頁瀏覽應用之資料率支援高速資料服務之通用封包無線電服務(GPRS)及可傳遞音訊及視訊應用之寬帶語音及資料之通用行動電信系統(UMTS)。
一般可將該等無線網路視為應用蜂巢式通訊技術之廣域網路(WAN)。蜂巢式通訊技術係基於一其中將地理覆蓋區域分解成多個小區之拓撲。在該等小區之每一中有一與行動使用者通訊之固定基地收發台(BTS)。基地台控制器(BSC)通常用於在該地理覆蓋區域中控制該等BTS及介接至各種封包交換網路及電路交換網路之適當網間連接器。
隨著對無線資訊服務之需求不斷地增加,使行動器件發展成支援整合之語音、資料及串流式媒體,同時提供蜂巢式通訊WAN與無線局域網路(LAN)之間的無縫網路覆蓋。無線LAN一般使用一諸如IEEE 802.11、Bluetooth(籃牙)、Home RF、Ultra-Wideband(超寬頻帶)(UWB)或諸如此類等標準協定在一相對小之地理區域上提供電話及資料服務。可在一辦公建築、家庭或公共場所中提供一LAN。
無線LAN之存在藉由使用無線LAN之基礎建設將蜂巢式通訊延伸至未經許可之頻譜而提供一增加一蜂巢式通訊WAN中使用者容量之唯一機會。然而,當行動器件搜尋一無線LAN時應小心防止功率消耗過度。連續地搜尋該行動器件附近之所有無線LAN可明顯降低電池壽命,乃因其必須掃描數量極大之不同頻率之頻帶。而且,藉由連續搜尋發現之某些無線LAN出於多種原因可能對該行動器件並無意義。因此,在此項技術中需要一種能夠花費最少之搜尋時間定位WAN中之無線LAN之行動器件。
本發明揭示一種無線通訊器件之一態樣。該無線通訊器件包括:一處理器,其組態用於依據來自一第二通訊網路之一個或多個參考信號產生關於一第一通訊網路該位置之資訊;及經組態用於儲存該資訊之記憶體。
本文揭示包含一可由一個或多個處理器執行用以實施一通訊方法之指令程式之電腦可讀媒體。該等指令可包括用於依據來自一第二通訊網路之一個或多個參考信號產生關於一第一通訊網路該位置之資訊之指令及用於將該資訊儲存於記憶體中之指令。
本文揭示一通訊方法。該方法包括:依據來自一第二通訊網路之一個或多個參考信號產生關於一第一通訊網路該位置之資訊;及將該資訊儲存於記憶體中。
本發明揭示一通訊裝置。該裝置包括:用於依據來自一第二通訊網路之一個或多個參考信號產生關於一第一通訊網路該位置之資訊之構件;及一儲存由該構件產生之資訊之記憶體。
應瞭解,依據下文之詳細闡釋,彼等熟悉此項技術者將易於明瞭本發明之其他實施例;其中僅以舉例說明形式顯示並描述本發明之各種實施例。正如人們將要瞭解,本發明可具有其他及不同實施例,且可以其他不同態樣對其若干細節進行修改,所有該等皆不背離本發明之精神及範疇。因此,應將該等圖式及詳細說明視為舉例說明性而非限制性。
下文結合附圖所闡述的詳細說明旨在作為本發明各種實施例之說明,而非意欲代表本發明僅可實施為此等實施例。該詳細敍述包括具體細節,以用於提供對本發明之全盤瞭解之目的。然而,對熟悉此項技術者而言,顯而易見,無需此等具體細節亦可實施本發明。於某些實例中,為避免模糊本發明之概念,以方塊圖形式顯示眾所習知之結構及組件。
在下文詳細說明中,將在一無線通訊器件搜尋一蜂巢式通訊WAN中一無線LAN之背景下描述各種概念。雖然本發明將描述一能夠在一具有IEEE 802.11能力之CDMA2000 1x網路中運作之無線器件之具體實例,但彼等熟習此項技術者將易於瞭解:該等實例中之原理可延伸至能夠存取多個網路之其他無線器件。舉例而言,一無線器件可經組態以搜尋覆蓋一GSM網路之WCDMA網路。因此,任何對能夠與一IEEE 802.11網路通訊之蜂巢式行動CDMA器件或任何其他具體實施例之提及皆僅意欲舉例說明本發明之各種態樣,應理解該等態樣具有一廣泛之應用範圍。
圖1係一蜂巢式通訊WAN之概念性圖式。蜂巢式通訊WAN 100可應用任何數量之小區在一地理區域上提供無線覆蓋。可在WAN 100之每一小區中均可設置一BTS以提供一至各無線通訊器件之空中介面。可使用一BSC管理及協調WAN 100中之該等BTS並提供一至各種基於封包之網路及電路交換網路之介面。出於圖解說明之目的,圖1中顯示一單個小區,其具有一在一BSC 104控制下服務所有無線器件之BTS 102。一行動交換中心(MSC)106可用於提供一至公眾交換電話網路(PSTN)108及網際網路112之網間連接器。
有數個無線LAN散佈於該蜂巢式通訊WAN 100中。出於圖解說明之目的,顯示三個無線LAN 110a-110c。該等無線LAN 110a-110c可係IEEE 802.11網路或任何其他合適之網路。每一無線LAN 110a-110c均包括一個或多個至網際網路112之存取點(未顯示)。MSC 106、或行動網間連接器(MGW)116可用於將該等無線LAN 110a-110c介接至該PSTN 108。一無線通訊器件114可藉由一無線LAN或WAN 100中之一個或多個BTS存取連接至該網際網路112之其他IP器件。
無線器件114可係具蜂巢式通訊WAN及無線LAN通訊能力之任一合適之器件,例如無線電話、個人數位助理(PDA)、膝上型電腦、個人電腦(PC)、收發器、數據機、照相機、遊戲控制臺或類似器件。由於無線器件114在蜂巢式通訊WAN 100中移動,因而其可能穿過一個或多個無線LAN 110a-110c之覆蓋範圍。
原理上,當無線器件114在蜂巢式通訊WAN 100中移動時,其可藉由不斷地搜尋信標信號來偵測每一無線LAN 110a-110c之存在。每當無線器件114偵測一無線LAN時,其均可決定是否切換至該無線LAN來存取該PSTN 108。然而該過程要求無線器件114掃描寬頻率頻譜並將大量處理器資源專門用於支援搜尋,導致功率消耗增大且電池壽命降低。
就功率消耗而言,更經濟之方法係僅當無線器件114處於適於存取之一無線LAN附近時方可搜尋。一無線LAN是否適於存取對每一無線器件將係一唯一確定。舉例而言,一無線器件可確定一無線LAN適於存取,乃因其散佈於該使用者之家或其辦公建築中。該相同之使用者可能被禁止存取商業競爭者或高度安全政府機關之辦公建築內之無線LAN。在某些情形下,存取當使用者在汽車中沿高速公路路過之一無線LAN可能不合意,否則將允許不受約束之存取。在後一情況下,即使以及時形式執行此一無線LAN之發現,蜂巢式通訊WAN與該無線LAN之間的來回交遞亦可引入不合意之延遲並增加通話中斷之可能性。
現在將參考圖2描述一僅搜尋在其附近之合適之WLAN之無線器件之實施例。圖2係一具有多個小區之WAN之概念性圖式。BTS 102a-102c分別位於每一小區202a-202c中。每一BTS 102a-102c均發射一導頻信號,無線器件114可使用該導頻信號與一個或多個BTS同步並在無線器件114同步至一BTS之後提供所發射信號之相關調變。該等導頻信號可係展頻或任何其他類型之適合參考之信號。在展頻導頻信號之情況下,以相同PN碼之不同相位偏移來展頻各導頻信號。可藉由將該等導頻信號同步至一通用時間參考(例如Navstar全球定位衛星導航系統)來保持該相位關係。不同之相位偏移允許無線器件114在三個BTS 102a-102c中予以區別。無線器件114一般與具有最強導頻信號之BTS建立連接。
當無線器件114在蜂巢式通訊WAN 100中移動時,其監視來自不同BTS 102a-102c之導頻信號,以當無線器件114跨過蜂巢式通訊邊界時幫助BTS交遞。該等導頻信號亦可用於確定適於由無線器件114存取之無線LAN之所在。舉例而言,無線器件114可在任一特定位置藉助WAN 100觀察n
個具有可量測信號強度之BTS導頻信號。該等導頻信號可由兩個向量x1
,...,xn
及y1
,...,yn
中之兩者或一者來表徵,其中x係該導頻信號之信號強度,而y係該導頻信號之信號相位。該對向量在概念上係無線器件114之位置之一指紋或一簽名。該指紋可與一含有適於存取之每一無線LAN之指紋的資料庫相比較。若無線器件114在資料庫中找到一匹配其當前指紋之指紋,則其可使用彼項目中所含之資訊來搜尋並存取相應之無線LAN。
圖3係一圖解說明一無線通訊器件之實例之簡化方塊圖。無線器件114可構建成多種形式。於至少一實施例中,無線器件114包括一藉由系統匯流排304與諸多周邊器件通訊之處理器302。雖然出於闡釋無線器件114運作之目的而將處理器302繪示為一單個實體,但彼等熟習此項技術者將瞭解可用一個或多個實體處理器來構建處理器302之功能性。舉例而言,可用一支援多種軟體應用程式之微處理器來構建處理器302。該等軟體應用程式可用於控制及管理無線器件114之運作及提供一至一鍵盤305及顯示器306之介面。處理器302亦可包括一執行某些處理功能之數位信號處理器(DSP)(未顯示)。另一選擇係,可用專用積體電路(ASIC)、場可程式規劃閘陣列(FPGA)、可程式規劃邏輯組件、離散閘或電晶體邏輯、離散硬體組件或類似器件單獨或與一微處理器及/或一DSP組合來構建處理器302。因此,術語"處理器"應廣義地解釋為涵蓋一無線器件中能夠處理數位基頻資訊之一個或多個實體。構建處理器302之方式將取決於特定應用及強加於整個系統上之設計約束。彼等熟習此項技術者將瞭解該等環境下硬體、韌體及軟體組態之可交換性及如何最佳地為每一特定應用構建所描述之功能。
周邊器件可包括記憶體308。可根據具體應用及無線器件之總設計約束,以多種方式構建記憶體308。舉例而言,記憶體308可包括一用於保存諸如基本輸入/輸出系統(BIOS)及作業系統等大程式之非揮發性永久儲存媒體。該等程式可被載入至亦屬於記憶體308之一部分的隨機存取記憶體(RAM)中。使用者所啟動之軟體應用程式亦可自該非揮發性永久儲存媒體載入至RAM中。記憶體308亦可包括快取記憶體,以進一步增加處理器302存取記憶體之速度。彼等熟習此項技術者將瞭解:貫穿本發明所用之術語"記憶體"包括任一合適之儲存媒體,該儲存媒體駐存於處理器302上、在處理器302外部或跨無線器件114中任何數量之實體予以分散。
無線器件114亦可包括一蜂巢式通訊收發器310及一無線LAN收發器312。在無線器件114之至少一實施例中,蜂巢式通訊收發器310能夠支援CDMA2000 1x通訊,且無線LAN收發器312能夠支援IEEE 802.11通訊。於圖3所示之實施例中,每一收發器310、312分別可具有一單個天線314、316,但收發器310、312可共用一單個寬頻天線並可包括一單個收發器或多個收發器。
處理器302可經組態以保留一包括適於由無線器件114存取之每一無線LAN之指紋的資料庫。該資料庫可保留在無線器件114中某些非揮發性儲存媒體上並在運作期間載入至RAM、快取記憶體及/或一般性檔案暫存器中。該資料庫可包括與每一指紋一起之相應無線LAN之標識及操作頻率。
可以任何數量之方法構造該資料庫。舉例而言,可藉由一學習製程構造該資料庫。於無線器件114之一實施例中,該學習製程可由使用者起始。於該實施例中,無線器件114不自己起始對一未知無線LAN之搜尋,但允許使用者起始一搜尋。使用者可藉由在鍵盤304上進行一個或多個輸入或按下無線器件114上之一單獨鍵(未顯示)來起始一搜尋。當使用者起始一搜尋時,處理器302掃描無線LAN收發器312之頻率以搜尋來自一存取點之信標信號。若無線器件114偵測到一來自一無線LAN之信標信號,則可產生一指紋並將其儲存於該資料庫中。根據蜂巢式通訊收發器310自WAN中各個BTS接收之導頻信號之列表來形成該無線LAN之指紋。下文顯示一無線LAN指紋之一資料庫項目之實例。
該表之第一排係指蜂巢式通訊WAN。雖然本文中未提及,但本發明中所述之各種概念可延伸至一具有多個蜂巢式通訊WAN之通訊系統中。舉例而言,一漫遊於其本地網路領域之外或外地區域之無線器件可由其本地服務供應商網路以外之網路服務。若一合適之無線LAN可被該無線器件存取,則受訪之WAN可列於該第一排中。第二排係指無線LAN之標識,例如該無線LAN之該存取點或該組存取點之MAC位址。通常,該MAC位址包括於由該無線LAN中該存取點發射之信標信號中,因此可供無線器件114現成使用。第三排係指當處理器302偵測到來自該存取點之信標信號時該無線LAN收發器312調諧至之頻率。剩下兩排包括該等包含指紋本身之值。其包括蜂巢式通訊收發器310自WAN中之n
個BTS接收之每一導頻信號之信號強度及信號相位量測。
構成指紋之導頻信號之信號強度或信號相位可具有變化(甚至對於相同之位置)或難以高度精確量測之值。因此,可將一裕量組合進該資料庫中以有效地增加指紋之大小。該裕量可由指紋中一"偏差"變量來表現。下文顯示一資料庫項目之一實例。
圖4係一圖解說明一無線器件在一適於存取之無線LAN附近之概念性方塊圖。無線LAN 110包括一位於距無線器件114一定距離處之存取點302。包圍存取點302之區域304指示存取點302之虛擬位置。存取點302之虛擬位置可藉由增大該等偏差變量而放大並同樣地藉由減小該等偏差變量而縮小。施加至該信號強度及信號相位量測上之偏差量將相依於具體應用及強加於該系統之總設計約束而改變。舉例而言,一大偏差可反應一以會觸發對目標無線LAN之無用搜尋之虛假警報為代價而將更多重要性放在偵測一無線LAN之設計決定上。換言之,若一無線LAN指紋中之偏差變量導致存取點302之明顯大之虛擬位置,則無線器件114可在其不位於該信標信號之範圍內時決定其應搜尋並存取該無線LAN。然而,若該存取點之虛擬位置過小,則可能出現即使無線器件114處於一適於存取之無線LAN附近其亦會保持連接至該蜂巢式通訊WAN之情況。
替代地或除剛剛描述之學習方法之外,當使用者在一合適之無線LAN附近在無線器件114上撥打一電話時,可形成資料庫項目。返回圖3,每當使用者在無線器件114上撥打一電話時,處理器302即掃描該無線LAN收發器312之頻率以搜尋一信標信號。若處理器302偵測到一信標信號,則其使用自該WAN接收之BTS導頻信號產生一無線LAN之一指紋。然後該指紋及根據該無線LAN收發器312之該信標信號及調諧頻率獲得之MAC位址一起藉由處理器302儲存於該資料庫中。
後一方法之缺點係為處理器302所發現之每一無線LAN產生指紋並將其儲存於該資料庫中,即使一特定無線LAN對無線器件114無意義。舉例而言,一在一汽車中沿高速公路移動之使用者可能不希望在資料庫中儲存當其撥打電話時碰巧經過之一無線LAN之指紋。為解決該情況,處理器302可經組態以僅當其在一特定時間段內多次發現一無線LAN時,其方會以該無線LAN之一指紋來更新該資料庫。更具體而言,當使用者第一次在一無線LAN附近之無線器件114上撥打一電話時,處理器302定位該信標信號並獲得該相應存取點之MAC位址。然而,代替產生一指紋並更新該資料庫,處理器302僅在記憶體308中記錄該MAC位址、設定一計數器並時間標記該項目。使用者下一次在該相同無線LAN附近在無線器件114上撥打一電話時,處理器302根據該信標信號獲得該MAC位址,並將該MAC位址與記憶體308中現有之記錄項目相比較。若找到一匹配,則該計數器增加且其輸出與一臨限值相比較。若該計數器輸出達到或超過該臨限值,則該處理器302為該無線LAN產生一指紋,並將該指紋及該無線LAN收發器312之MAC位址及該調諧頻率儲存於該資料庫中。另一方面,若該計數器輸出未達到該臨限值,則處理順302不更新該資料庫。假若在設置了時間標記後經過過長之時間,則在計數器輸出達到該臨限值之前,計數器遞減且去除與該陳舊輸入相關之時間標記。
另一選擇係,處理器302可經組態以在無線器件114靜止之同時處理器302發現一無線LAN時,方會以該無線LAN之一指紋更新該資料庫。該方法防止處理器302以在一汽車上之使用者在撥打電話時碰巧經過之一無線LAN之一指紋來更新該資料庫。可以多種形式式構建無線器件114確定其是移動抑或靜止之方式。舉例而言,處理器302可監視蜂巢式通訊收發器310所接收之導頻信號之相位變化。假設係標定之環境條件,若導頻信號之相位隨時間變化,則處理器302確定無線器件114正在移動,因此不以其發現之任一無線LAN之指紋來更新該資料庫。另一方面,若導頻信號之相位相對靜止,則處理器302確定無線器件114係靜止。一旦做出該確定,處理器302即掃描無線LAN收發器312之頻率以搜尋一信標信號。若成功,則處理器302根據該信標信號獲得該MAC位址,使用來自該WAN之BTS導頻信號產生一指紋,然後將該資訊及該無線LAN收發器312之調諧頻率一起輸入該資料庫。
在所述學習方法之延伸中,當無線器件114靜止時若在掃描無線LAN收發器312時未發現一無線LAN,則處理器302不會重複掃描,除非無線器件114已移動距前一不成功掃描足夠遠之距離,並確定無線器件114再次靜止。該方法對於無線器件114緩慢移動之情況(例如使用者在大型購物中心中閒逛)尤其有用,且該運動足夠慢以致於該運動因與觸發一無線LAN收發器312之掃描之決定相關聯之必需量測誤差容許量而看似靜止。
處理器302可用學習方法之另一實例涉及週期性地搜尋一無線LAN。可使用一計時器產生週期性之觸發強迫處理器302進入一搜尋模式。在該搜尋模式中,處理器302掃描無線LAN收發器312之頻率以搜尋來自一存取點之信標信號。若處理器302偵測到一信標信號,則其獲得該相應存取點之MAC位址,使用來自該WAN之BTS導頻信號為該無線LAN產生一指紋,然後將該資訊及該無線LAN收發器312之調諧頻率輸入該資料庫中。可將先前所述之相同條件強加於處理器302上以防止以不適於由無線器件114存取之無線LAN更新該資料庫。
處理器302可進一步經組態以自該資料庫中去除未被無線器件114存取達一延伸時間段之無線LAN之指紋。該功能可藉由為該資料庫中每一指紋建立一計數器或計時器來構建。每當該無線器件存取每一無線LAN時,均會重設其相應指紋之計數器或計時器。於該構建中,處理器302定期自該資料庫中刪除一無線LAN之計數器或計時器已過期之該無線LAN相關之所有資訊。另一選擇係,每當每一無線LAN被存取時,處理器302均可時間標記該資料庫中其相應之指紋。對於後一種方法,處理器302保持即時時鐘或可以其他方式接收即時時間(例如自WAN中接收),並刪去該資料庫中具有過期時間標記之每一無線LAN之資訊。
無線器件114亦可預先提供一個或多個無線LAN之指紋。換言之,當服務供應商啟動無線器件114時,一無線LAN之指紋及相應存取點之MAC位址及該無線LAN之操作頻率可程式化進該資料庫中。舉例而言,當一商行給其所有雇員發放無線電話時,預先提供可係有用。
返回圖1,無線器件114保留其當前位置來自WAN 100中該等BTS導頻信號之一指紋。隨著無線器件114移動,該指紋改變。如上文所述,無線器件114之根據n個BTS導頻信號產生之指紋的特徵可在於兩個向量x1
,....,xn
及y1
,....,yn
。使用一合適之算法連續或定期比較該無線器件114之指紋與該資料庫中該等指紋是否匹配。所用算法可相依於該等性能參數及強加於該系統上之總設計約束而改變。出於圖解說明之目的,下文提供一算法之實例。
|xi
-si
|<di
且|yi
-pi
|<qi
,其中i=1,...,n.
若一資料庫輸入項之所有n
個值皆滿足上述條件,則無線器件114中之處理器接下來檢查是否滿足下一條件:SUM|xi
-si
|<X或SUM|yi
-pi
|<Y,其中X及Y係臨限值。若該資料庫項目亦滿足後面的條件,則無線器件114接下來將無線LAN收發器調諧至該正確之操作頻率並搜尋一具有該正確MAC位址之信標信號。如前文所述,每一無線LAN指紋之操作頻率及MAC位址皆儲存於該資料庫中。
在無線器件114找出該無線LAN 110b之後,其發送一交遞請求至該IP網路112上之一伺服器(未顯示)。該伺服器發送一交遞訊息至MSC 106。MSC 106使用該交遞訊息通知BTS 102至無線LAN 110b之交遞。該伺服器亦發送一交遞命令至無線器件114。響應該交遞命令,無線器件114斷開與BTS 102之現有空中介面並與無線LAN 110b中之該存取點建立一新空中介面。在與該無線LAN 110b中之該存取點建立新空氣介面後,該伺服器發訊該MSC 106以指示該交遞完成。現在無線器件114現在可使用無線LAN 110b支援蜂巢式通訊服務。
無線器件114在由無線LAN 110b伺服之同時,可定期調諧進該WAN中並比較無線LAN指紋中之參數與無線LAN 110b覆蓋區域中界限內之量測資料。該等量測資料可用於更新無線LAN 110b之指紋資訊,例如藉由擴大相位偏差向量來調整邊界。當無線LAN信號強時該等週期量測之頻率可相對較低,且應隨著信號變弱而增加,則可能指出無線LAN覆蓋區域之邊緣。
當無線器件114在無線LAN 110b之覆蓋區域中移動時,其量測之該無線LAN信號強度可根據距無線LAN存取點之距離、該輻射路徑上之障礙、天線輻射型樣及其他因素而改變。假若在無線器件114處量測之信號強度降至低於一臨限值,則無線器件114可起始一返回至蜂巢式通訊WAN 100之交遞。返回至蜂巢式通訊WAN 100之交遞可由無線器件114藉由向IP網路112上一伺服器(未顯示)發送一交遞請求來起始。由於在由無線LAN 110b伺服之同時藉由偶爾量測WAN 100而保持同步於WAN 100,所以行動器件114知曉該交遞中將涉及之目標BTS或BTS組。此係傳遞至該伺服器之資訊。作為該交遞程序之一部分,該伺服器發送一交遞訊息至MSC 106。MSC 106使用該交遞訊息來尋找一目標BTS。該目標BTS可係圖1中所示之BTS 102或該蜂巢式通訊WAN 100中之任何其他BTS。接下來,MSC 106通知目標BTS準備用於交遞之資源,並將一交遞命令發送回該伺服器。回應該交遞命令,該伺服器指示無線器件114移至該目標BTS。無線器件114藉由斷開與無線LAN 110b中該存取點之現有空中介面並與目標BTS建立空中介面來達成該目的。在與目標BTS建立空中介面之後,該目標BTS發訊該MSC 106以指示該交遞完成,且無線器件114重新開始蜂巢式通訊WAN 100之使用。
圖5係一用於產生位置資訊之一過程之概念性圖式。起始一對一第一通訊網路之搜尋,塊500。該第一通訊網路可係一WLAN。當該無線通訊器件透過一WAN撥打一電話時,可在該無線通訊器件處起始對第一通訊網路之搜尋。另一選擇係,該搜尋可係定期性或基於一個或多個其他準則。在起始該搜尋之後,可偵測該WLAN網路之一個或多個存取點,塊505。於某些態樣中,該偵測可依據在一搜尋時間段期間自一個或多個存取點接收信標。亦可使用其他偵測機制。
然後可產生該等存取點之位置資訊,塊510。該位置資訊可包括一指紋,該指紋包括信號強度、信號強度偏差、相位及/或相位偏差資訊中之一個或多個。亦可使用額外及替代之資訊(包括舉例而言一存取點之頻率及BSS ID)作為該位置資訊之一部分。然後將所得資訊儲存於一記憶體中,塊515。
在此情況下,若無網路被偵測到,則該過程結束。而且,應注意塊500及505係任選,其用於位置資訊之產生。
圖6係無線通訊器件之另一簡化方塊圖。一用於產生位置資訊之構件610與一儲存該位置資訊之記憶體615相耦合。如本文所述,該位置資訊可係一WLAN網路相對於一WAN網路之任何位置資訊。於某些態樣中,一用於確定網路位置之構件600(其包括一用於起始搜尋一網路之構件605)可與用於產生位置資訊之構件610相耦合。
結合本文所揭示實施例闡述之各種示例性邏輯塊、模組、電路、元件及/或組件皆可用一通用處理器、數位信號處理器(DSP)、應用專用積體電路(ASIC)、現場可程式化閘陣列(FPGA)或其它可程式化邏輯組件、離散閘或電晶體邏輯、離散硬體組件、或設計用於執行本文所述功能其任意組合來建置或實施。一通用處理器可係一微處理器,但另一選擇係,該處理器可係任何傳統型處理器、控制器、微處理器、或狀態機。一處理器亦可構建為計算組件之一組合,例如一DSP與一微處理器之組合、複數個微處理器之組合、一個或多個微處理器與一DSP核心之組合、或任何其他此種組態。
結合本文所揭示實施例闡釋之方法或算法可直接包含在硬體、一個或多個由一處理器執行之指令,或兩者之組合內。該軟體可作為一個或多個指令駐存於:RAM記憶體、閃光記憶體、ROM記憶體、EPROM記憶體、EEPROM記憶體、暫存器、硬磁碟、一可抽換磁碟,磁碟、一CD-ROM、此項技術中所習知之任何其他形式之儲存媒體中。一儲存媒體可耦接至該處理器,以使該處理器可自該儲存媒體中讀取資訊或將資訊寫入該儲存媒體中。或者,該儲存媒體可整合至該處理器。
提供上述說明旨在使熟習此項技術者能夠實踐本文所述之各種實施例。彼等熟習此項技術者易知對所揭示實施例的各種修改,且本文所界定之一般原理可應用於其他實施例。因此,該申請專利範圍並非意欲被限定於本文所示實施例,而是欲賦予其與申請專利範圍語言相一致之全部範疇,其中除非明確指明,否則,以單數形式提及一元件並非意欲表示"一個及僅一個",而係"一或多個"之意。所有熟習此項技術者所習知或此後將習知的該整個揭示內容所述各實施例之元件之結構及功能等效物皆明確地以引用方式併入本文中並意欲涵蓋於申請專利範圍內。而且,無論是否於申請專利範圍中明確引用此揭示內容,本文所揭示之內容皆非意欲奉獻給公眾。申請專利範圍要素皆不依據35 U.S.C.§112第六段之規定加以解釋,除非使用片語"用於...之構件"明確描述該要素,或於方法項中使用片語"用於...之步驟"描述該要素。
100...蜂巢式通訊WAN
102...BTS
102a...BTS
102b...BTS
102c...BTS
104...BSC
106...行動交換中心(MSC)
108...公眾交換電話網路(PSTN)
110a...無線LAN
110b...無線LAN
110c...無線LAN
112...網際網路
114...無線通訊器件
116...行動網間連接器(MGW)
202a...小區
202b...小區
202c...小區
302...處理器
304...系統匯流排
305...鍵盤
306...顯示器
308...記憶體
310...蜂巢式通訊收發器
312...無線LAN收發器
600...用於確定網路位置之構件
605...用於起始搜尋一網路之構件
615...記憶體
在附圖中,以舉例方式而非限定方式圖解說明一無線通訊系統之各種態樣,其中:
圖1係有數個無線LAN分佈其中之一WAN之概念性圖式;
圖2係一有多個小區及數個無線WAN分佈其中之一WAN之概念性圖示;
圖3係一無線通訊器件之一簡化方塊圖;
圖4係一圖解說明一無線LAN中一存取點之一虛擬位置之概念性圖式;
圖5係一用於產生定位資訊之過程之概念性圖式;及
圖6係另一無線通訊器件之簡化方塊圖。
114...無線通訊器件
302...處理器
304...系統匯流排
305...鍵盤
306...顯示器
308...記憶體
310...蜂巢式通訊收發器
312...無線LAN收發器
Claims (15)
- 一種無線通訊器件,其包括:一處理器,其組態以:在一搜尋期間偵測一第一通訊網路;且建立針對該第一通訊網路之一指紋以回應該偵測,使用來自於一第二通訊網路之一參考信號,其中該指紋包括相位資訊、信號強度資訊、相位偏移資訊及對應至來自於該第二通訊網路之該參考信號之信號強度偏移資訊,且其中在該第一通訊網路中之一存取點之一覆蓋區之一虛擬大小係至少部份地由該相位偏移資訊或該信號強度資訊之至少一者所定義;及經組態用於儲存該指紋之記憶體。
- 如請求項1之無線通訊器件,其中該指紋包括該第一通訊網路中一存取點之一操作頻率。
- 如請求項1之無線通訊器件,其中該處理器進一步經組態以在自該處理器最後一次存取該第一通訊網路經過一時間週期後刪除來自該記憶體之該指紋。
- 如請求項1之無線通訊器件,其中該第一無線通訊網路為一局域網路(LAN)及該第二無線通訊網路為一廣域網路(WAN)。
- 如請求項1之無線通訊器件,其中在該第一通訊網路中之一存取點之一覆蓋區之一虛擬大小係至少部份地由該 該信號強度偏移資訊所定義。
- 如請求項1之無線通訊器件,其中該處理器進一步經組態以藉由偵測該第一通訊網路以回應一使用者啟始之搜尋而建立在該記憶體中之該指紋。
- 如請求項1之無線通訊器件,其中當一電話由該無線通訊器件撥打時或在確定該無線通訊器件為靜止之後,該處理器進一步經組態以啟始該搜尋。
- 如請求項1之無線通訊器件,其中僅在自該處理器之一先前不成功之搜尋確定該無線通訊器件已經移動之後,該處理器進一步經組態以啟始該搜尋。
- 一種電腦可讀取媒體,其包括可由一或多個處理器執行之多個指令,該等指令包括:用於在一搜尋期間偵測一第一通訊網路之多個指令;用於建立針對該第一通訊網路之一指紋以回應該偵測之多個指令,該等指令使用來自於一第二通訊網路之一參考信號,其中該指紋包括相位資訊、信號強度資訊、相位偏移資訊及對應至來自於該第二通訊網路之該參考信號之信號強度偏移資訊,且其中在該第一通訊網路中之一存取點之一覆蓋區之一虛擬大小係至少部份地由該相位偏移資訊或該信號強度資訊之至少一者所定義;及用於儲存該指紋於一記憶體中之多個指令。
- 一種藉由一個無線通訊器件通訊之方法,其包括:在一搜尋期間偵測一第一通訊網路;建立針對該第一通訊網路之一指紋以回應該偵測,使用來自於一第二通訊網路之一參考信號,其中該指紋包括相位資訊、信號強度資訊、相位偏移資訊及對應至來自於該第二通訊網路之該參考信號之信號強度偏移資訊,且其中在該第一通訊網路中之一存取點之一覆蓋區之一虛擬大小係至少部份地由該相位偏移資訊或該信號強度資訊之至少一者所定義;及儲存該指紋於一記憶體中。
- 如請求項8之方法,其中該指紋包括該第一通訊網路中一存取點之一操作頻率。
- 如請求項8之方法,其進一步包含當撥打一電話時或在確定該無線通訊器件為靜止之後,啟始該搜尋以偵測該第一通訊網路。
- 如請求項8之方法,其進一步包含自一先前不成功之搜尋確定該無線通訊器件已經在移動中之後啟使該搜尋。
- 如請求項8之方法,其中該第一無線通訊網路為一無線局域網路(LAN)及該第二無線通訊網路為一廣域網路(WAN)。
- 一種無線通訊裝置,其包括: 用於在一搜尋期間偵測一第一通訊網路之構件;用於建立該第一通訊網路之一指紋以回應該偵測之構件,該構件使用來自於一第二通訊網路之一參考信號,其中該指紋包括相位資訊、信號強度資訊、相位偏移資訊及對應至來自於該第二通訊網路之該參考信號之信號強度偏移資訊,且其中在該第一通訊網路中之一存取點之一覆蓋區之一虛擬大小係至少部份地由該相位偏移資訊或該信號強度資訊之至少一者所定義;及用於儲存該指紋於一記憶體中之構件。
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- 2006-08-10 EP EP10012076A patent/EP2282594A3/en not_active Withdrawn
- 2006-08-10 TW TW099137508A patent/TWI451790B/zh active
- 2006-08-10 BR BRPI0615171-0A patent/BRPI0615171A2/pt not_active IP Right Cessation
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- 2006-08-10 WO PCT/US2006/031497 patent/WO2007022005A2/en active Application Filing
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- 2006-08-10 MX MX2008001895A patent/MX2008001895A/es active IP Right Grant
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- 2006-08-10 RU RU2008108990/09A patent/RU2384982C2/ru not_active IP Right Cessation
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WO2007022005A2 (en) | 2007-02-22 |
JP4976393B2 (ja) | 2012-07-18 |
US9148866B2 (en) | 2015-09-29 |
EP1913790B1 (en) | 2012-07-04 |
RU2384982C2 (ru) | 2010-03-20 |
US8169982B2 (en) | 2012-05-01 |
EP2282594A2 (en) | 2011-02-09 |
JP2009505513A (ja) | 2009-02-05 |
AU2006279742A1 (en) | 2007-02-22 |
US20070060130A1 (en) | 2007-03-15 |
NO20081221L (no) | 2008-03-07 |
AU2006279742B2 (en) | 2010-12-16 |
CA2617863A1 (en) | 2007-02-22 |
CN101283617B (zh) | 2013-03-27 |
KR20080042875A (ko) | 2008-05-15 |
JP2012105320A (ja) | 2012-05-31 |
NZ565661A (en) | 2010-10-29 |
KR100998143B1 (ko) | 2010-12-02 |
JP5307224B2 (ja) | 2013-10-02 |
TW200742463A (en) | 2007-11-01 |
TW201123950A (en) | 2011-07-01 |
WO2007022005A3 (en) | 2007-04-05 |
CN101283617A (zh) | 2008-10-08 |
IL189274A0 (en) | 2008-08-07 |
EP2282594A3 (en) | 2011-08-03 |
BRPI0615171A2 (pt) | 2011-05-03 |
TWI362225B (en) | 2012-04-11 |
MX2008001895A (es) | 2008-03-24 |
RU2008108990A (ru) | 2009-09-20 |
US20120220310A1 (en) | 2012-08-30 |
EP1913790A2 (en) | 2008-04-23 |
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