TWM278165U - Access point for delivering assistance data - Google Patents
Access point for delivering assistance data Download PDFInfo
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- TWM278165U TWM278165U TW093211396U TW93211396U TWM278165U TW M278165 U TWM278165 U TW M278165U TW 093211396 U TW093211396 U TW 093211396U TW 93211396 U TW93211396 U TW 93211396U TW M278165 U TWM278165 U TW M278165U
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- Prior art keywords
- access point
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- access
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0072—Transmission or use of information for re-establishing the radio link of resource information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/16—Performing reselection for specific purposes
- H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
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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
- H04W88/08—Access point devices
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Small-Scale Networks (AREA)
- Circuits Of Receivers In General (AREA)
Description
修止 >94 7. -7 本年月B 補充 M278165 八、新型說明: 【新型所屬之技術領域】 本案係關於一無線通訊系統,尤指一種關於支援資料 至無線傳送/接收單元(WTRUs)之傳送。 【先前技術】 首先參閱第1圖,其顯示一習用之無線通訊系統1〇〇。 該系統100包含至少一無線傳送/接收單元(WTRU)1〇2、一 存取點104、及至少一用以控制並管理該系統1〇〇内之通訊 之系統控制器106。典型地,在無線區域網路式(WLAN)系 統中,網路可擴展成第2圖所示之結構。 在第2圖中’無線網路2〇〇包含一系統控制器2〇6、複 數個存取點214、216、及複數個WTRUs 212、218。WTRUs 212 218係分別與存取點214、216歸為群組。這些群組通 常被稱為基本服務組(BBSs)220、222。典型地,複數個 220 222係經由一分散糸統(ds)224進行連接,其中複數 個BSSs通常被稱為一延伸服務組(ESS)。較佳地,存取點 214、216係藉由一網路219而連接於該系統控制器2〇6。 一般說來,支援資料係為一由關於一特定存取點之 WTRUs職供或從該峡存取料轉之資料。典型地, 支援資料可包含關於鄭近該特定存取點之存取點之任何資 訊型式之任何資料型式(亦即,存取點之烟涵蓋區域係: M278165 補充 本%7·〆* 接於該特定存取點之涵蓋區域)^假如支援資料藉由提供關 於發現/辨識鄰近存取點之必要資訊而幫助了 Wtrus之國 際漫遊/交遞。 經由範例’支援資料可包含關於鄰近存取點之資訊, 例如鄰近WTRUs與存取點之操作頻率、存取模式(例如 802.11跳頻展頻(FHSS)/直接序列展頻(DSSS)、8〇211a, 802.11b高速直接序列展頻(HR_DSSS)等等)、時序、關於鄰 近基本服務組(BSSs)之糸統配置資訊(例如準備傳送(rts)/ >月理後送(CTS)、點協調功能(pcf)、有線等效保密(训gp) 等等)。 目鈾,支援資料係使用點對點(亦即單向廣播)信號發送 來進行傳送。在802·χΧ型態之系統中,例如,支援資料係 以包含鄰近資訊之一資訊元件(正)形式來提供。正係併入現 存之探針響應訊框。典型地,當WTRU企圖尋找鄰近BSSs 時’採針響應訊框係從一存取點被傳送,以做為從一 WTRU 被傳送之一探針請求管理訊框之回應。這樣的安排是沒有 效率的,然而,使用點對點信號發送來傳送支援資料會導 致相當大量的網路流量,因而大大地增加了嚴重延遲之可 此性,不只疋關於支援資料之傳送/接收,也關於一般的傳 送/接收。 因此,有必要提供一不受上述缺點限制,又可提供 WTRUs支援資料之方法及系統。 M278165 11!^ OH. η 1 補充本 【新型内容】 --—〜— 本案係為一用以提供支援資料至無線傳送/接收單元 (WTRUs)之存取點。該支援資料包含關於該存取點之鄰近 存取點之魏。該支援資料係仙乡路廣減/或廣播形式 之信號發送來進行傳送,其可健WTRUs從-存取點至 另一存取點之漫遊與交遞。 【實施方式】 儘官在較佳實施例的特別組合中描述了本創作的特徵 及元件,每—個特徵及元件均可被單獨地使用(而沒有這 些較佳實施例的其他特徵及元件)或以各種的組合具有或 不具有本創作的其他特徵或元件。 於此,—無線傳送/接收單元包含但不限於一使用者設 備、移動站#、固定或移動:欠寫單元、攜帶型傳呼器或任 何其他可在無線環境下操作的裝置類型。當述及至此,一 存取點包含但不限於一基站、節點B、點控制器、存取點 或任何其他在無線環境下的介面裝置類型。於此,交遞這 個詞包含當一 WTRU活躍地接收或傳送資料時改變存取 二占以及/又遊這個祠包含當一 WTRU不活躍地接收或傳送 資料時改變存取點。本創作同樣地應用於這兩個情況以及 這兩個詞交遞及漫遊於此可以相互交換使用,因而這兩個 詞經常述及的情況是WTRU聯繫或其他具有一第一存取點 令不同運作與一第一存取點產生聯繫,以及具有該第一存 M278165 7· -/ 補充本年t霉 取點的聯繫最後終止。 一— -— 一般而言在本創作中,存取點使用OAM、相互存取點 訊號、掃目苗、㈣WTRUs進行掃聪或上述的組合以獲得 支援資料,以及傳送此資訊作為單—的訊息給一複數個 WTRUs.。-旦資料麟,—存取料與其他存取點分享鄰 近資訊允許這些存取點傳送資訊給WTRUs_ 參考第3圖其為-無線通訊系、统,此系統包括 至少-延伸服務組(ESS)。然而,為了描述本創作的目的, 第3圖中示出兩個ESSs 336及338,第一個挪说根據 本創作設置以及包含一系統控制器3〇2、多個存取點3〇4、 306、308 以及多個 WTRUs 31〇、312、314。當然此第一 ESS可以設置具有一單一存取點,較適當的其可以是一 BSS此苐ESS 336含盍的所有區域以粗線晝出以及包含 含蓋區域324、326、328。此第二ESS 338亦包含一系統控 制器316,多個存取點318、320、322以及多個WTRUs (未 示出)。此第二ESS 338含蓋的所有區域包含含蓋區域 330、332、334。 在本創作中,第一 ESS 336的存取點3〇4,306,308每一 個都包含處理器340、342、344用以獲得支援資料以及提 供給個別的WTRUs。此支援資料增進WTRUs的交遞與漫 遊。值得注意的是僅第一 ESS 336本創作圖示出,存粹係 為了簡化本創作的描述。當然’任何數量的存取點均可以 M278165 攻瓜 w· ί · ·, jl充“㈠ 根據本創作加以設置,而不管其與一 ESS或BSS的關連。 支板貧料(即鄰近列與鄰近資訊)較佳的可由操作及 維護(OAM)、存取點間專有的訊號(即相互存取點訊號)、 主動/被__崎獲得,而不是由獅存取點及/或從 贾她_量評估所使用者。本用以獲得鄰近資訊的方法 可隨著收尋資訊之鄰近存取點改變。 舉例來說,在圖3中,當存取點304在尋找關於存取 點306及308於存取點3〇4的同一 ESS 336之中的資料時, 較it者為彳賴存取點0部訊號及域。較佳者為qam 係由於’例如,存取點3〇4、3〇6、3〇8分享一共同系統控 制器302,進而使關於存取點306、308之鄰近資料透過位 於該控制H 302之〇AM被提供給存取點綱。較佳者為存 取二占内4 號係由於,例如,當存取點3G4、襄、遞間 之直接連結為簡單化而顯示出來,如圖2所示之-分佈網 路典型地提供於該組成ESS 336的存取點3G4、寫、3〇8 之間如佈網路提供直接之佈線連結,則存取點内部訊 號可於其上有效地進行。使畴取_部訊號時,存取點 内邓協定(Inter-Access Point Protocol ; IAPP)便能使用。 ^如上所述,其他選擇也可使用,以使該存取點304由 鄰近存取點306、308獲得鄰近資訊。舉例來說,存取點3〇4 可命令無線傳送/接收單元31G掃_除了該存取點304正在 使用之所有頻道’以獲得任一檢測頻道之鄰近資訊,並回 M278165 修正34 7· _ 本导Λ 補充 報。亥貝汛。该存取點3〇4也可自行掃瞄其它頻道~。該 ”、、占304正在掃瞄之處,此掃瞄可以被單獨完成,或者與任 何/、匕由4漱線傳送/接收單元31〇所完成之掃瞒一起完 成i此實簡巾,度量,如接m係被用以選 擇)丨於由違存取點304所獲得以及由該無線傳送/接收單元 310所獲得的測量值之間的相同頻道。
忒存取點304獲得關於一鄰近存取點318資訊之處, 係毛生於存取,點304的ESS 336之外,較佳者為透過掃猫 以獲得該資料。如上所討論,該存取點3〇4可自行進行掃 目田(主動或被動),或是命令該無線傳送/接收單元3ι〇進行 掃猫(主動或被動)並回報。#<然,該存取點綱並不受 限於僅使用掃瞒以獲得關於存取點318之鄰近資訊。該存 取點304也可使用0AM及存取點内部訊號以獲得關於存 取點318之鄰近資訊。 存取點304之處理器340較佳者為,如上所述被配置 以獲得鄰近資訊。當然,如果需要,可使用—個以上的處 理器。若必要,由該處理器34〇所獲得之資訊則儲存於記 憶體350。此外,存取點304之處理器34〇也被配置以提供 鄰近資訊,係如下所述。 需注意的是,上述所描述之各種方法也可以適當之方 式組合使用。舉例來說,當一存取點3〇4開始連線而沒有 透過OAM定義的鄰近資訊,其能夠自行掃瞄周遭且/或命 10 M278165 94. 7. - ί 補充本年11 β 令其部分之揲線傳送/接收單元31〇也進行^猫。一^^ 取點3〇4有了此次掃目苗結果,其便可以使用此資訊;在其 ESS 336之内去告知其它存取點306、308關於此發現。這 將會最小化由這些存取點·、遍所進行之掃猫量(其可 能在流夏上造成某些小型的分佈)。對該存取點綱從聰 324外之-存取點318找尋鄰近資訊之處來說,此排列係特 別有幫助,因為該存取點3〇4之〇AM資訊可能並不包括 ES⑶4之外的存取點318、32〇、322。在此實施例要注意 勺疋在建立及鄰近資訊的發現後,該存取點撕應該週 期性地掃瞒(或是要求其無線傳送/接收單元之一進行掃 目苗),以察看其鄰近資訊的狀態是否改變。 由該存取點304所獲得之鄰近資訊最佳者為週期性地 廣播或疋夕路廣播至_係於該存取點3〇4白勺涵蓋範圍说 内操作之無線傳送/接收單元310。3^見在參見圖4,以使用無 線區域網路為例,於—特定BSS巾操狀存取點及無線傳 送/接收單元均使用_單„頻道(或頻率)來傳送並接收。 女圖4所示’该存取點週期性地傳送一信標402到各自之 頻道。其週期間之信標係典型地以每100ms -次進行傳 达°雖然可能’ 一存取點通常不-定要傳送其獲得之鄰近 祕至其位於每-信標之無線傳送接收單元 。因此,在較 么貝施例中,存取點係配置以傳送他們鄰近資訊,其係於 預叹日寸間週期的倍數,該預設時間週期係介於存取點傳 M278165 修正 94 7 〜7 , 補充本年·Λ β 达其信標402之間。該倍數可依所需設定 與其各別存取點緊密聯繫的WTRUs之流動程度的涵式。 舉例來說,在第4圖中,顯示鄰近資訊楊係藉由於 一 k標間隙之特定倍數之存取點傳送,傳送該鄰近資訊4〇6 之该特定存取點與其緊密聯繫之WTRUs共享該頻道,因 此,在鄰近資訊被傳送之該信標間隙,一旦該存取點完成 其信標4〇2之傳送,其等待一特定量的時間直到其能再_ 次獲得存取該頻道,此時間量典型地係參照一爭用階段 404,因為該存取點係爭用其各自的WTRUs以存取該頻 道,一旦该存取點獲得存取該頻道,其傳送該鄰近資訊 406,其中關於鄰近存取點的資訊係被提供給與該存取點緊 密聯繫的WTRUs,如同上文所述。 鄰近資訊406可當作一多重播送資訊傳送至一預設之 WTRUs群組,該WTRU係與該存取點緊密聯繫,該存取 點係傳送該鄰近資訊406。在另一實施例中,該鄰近資訊 406可廣播給所有與該傳送存取點緊密聯繫的WTRUs,值 得注意的是,該WTRUs,其係類似於該存取點的功能提供 他們鄰近資訊406,亦可使用點對點探針需求及/或頻道掃 瞄,該WTRUs可執行此類技術當作備用及/或補充以由該 存取點接收此類資訊。 該鄰近資訊406較佳地係藉由一管理型式訊框傳送(亦 即在一時間期間,其中系統管理資訊係被傳送),當WTRUs 12 N1278165 j修正 94 7 -7 補充本年w β 使用點對點信號傳送獲得鄰近資訊時,於實施例中使用之 该官理型式訊框,較佳地係與習知技術所使用的相同。此 外,在其接收鄰近資訊406之後,於一 WTRU執行之該相 連程序係與一點對點資訊相同,只有該WTRUs之認可除 外。 現在參照第5圖,所示為本創作另一實施例。在本實 施例中,典型的信標信號係配置一額外位元,其中該額外 位兀指示該鄰近資訊之存在/不存在,於一固定的信標訊框 傳送之該信標502與空的傳送信號位元506示於圖中,該 信標502係當作標準於一固定信標訊框藉由一存取點傳 送,其係根據一預設排程。鄰近資訊被送出之週期性係為 一預設時間週期之倍數,該時間週期係介於被傳送的信標 502之間,如同上述所討論,當該鄰近資訊要藉由一存取點 傳送至其各別WTRUs的時間到了,該鄰近資訊鄕係被 土曰加至。亥502與其一起在一延伸信標訊框$似中傳 达。在此方案中,該信標502之該傳送信號位元5〇6係完 整一致以反映該位元被設定的事實,以致於其指示鄰近資 訊508係存在於該延伸信標訊框5〇4之内,在一較佳實施 例中,该鄰近資汛508係被增加至該信標5〇2作為一資訊 設備(IE),如同上文所討論,該鄰近資訊5〇8包含支援 WTRUs之資訊,其係以由一存取點至一鄰近存取點有效率 地換手。 M278165 修止本94亭7.月-、 統 值得衫岐,本創作可於任何型^線通;系 仃,舉例來說,本創作可於無線區域網路(WLAN)、無 線個人區域網路(WPAN)、無線都會區域網路(WMAN)或任 何型式的無線通訊系統網路中執行。此外,儘管本創作之 特被和tl奸經於触實施辦叫定組合财,每一特 f或元件還是能翔或是伴隨私顿著摘作之其他特 被和兀件以不同組合使用。 【圖式簡單說明】 第1圖:其係習用無線通訊系統之方塊圖。 第2圖:其係一具有複數個存取點及複數個WTRUS之 習知方塊圖之方塊圖。 第3圖:其係本案之無線通訊系統之方塊圖。 弟4圖··其係一示意圖,顯示鄰近資訊係以一預設之時 間週期倍數藉由一存取點來進行傳送,其中該存取點係傳 送其信標。 ’ 第5圖··其係一示意圖,顯示鄰近資訊係以一預設之時 間週期倍數與以—延伸信標形式而隨著―信標來進行傳 迖其中该存取點係傳送其正規信標。 【主要元件符號說明】 100無線通訊系統 2 218、310、312、314、WTRUs 無線傳送/接收 14 M278165 修正94 r 本年 補充 早兀 104、214、216、304、306、308、318、320、322 106、206、302、316 系統控制器 200 無線網路 220、222、BBSs 基本服務組 224、DS 分散系統 219 網路 300 無線通訊系統 324、326、328、330、332、334 含蓋區域 336、338、ESSs 延伸服務組 340、342、344 處理器 350記憶體 402、502 信標 404爭用階段 406、508 鄰近資訊 506傳送信號位元 504延伸信標訊框 FHSS展頻 DSSS直接序列展頻 HR-DSSS高速直接序列展頻 RTS準備傳送 CTS清理後送 •Λ 存取點 修正94 7· -7 M278165 ^本 * 月 β 補充 PCF 點協調功能 WEP 有線等效保密 ΙΕ 資訊元件
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Claims (1)
- 年 I修正94 I補充本M278165 九、申請專利範圍: ^•-種提供支援資料至無線傳送/接收單元(曹她)的存 取點(AP) ’該存取點包含·· 至少一處理器,用以從至少一鄰近存取點取得支援資 料,該鄰近存取點各自的涵蓋區域係鄰近於該存取點之涵 蓋區域’·該支援資料包含用以促進一無線傳送增收單元 (wm;顧魏輕_近存取點之交叙資訊,該支 援資料係已從該鄰近存取點取得; 一記憶體’用以儲存自該鄰近存取點所接收之該支援 資訊;以及 訊 其中該處理器根據-歡排程而傳送做為一單 息之該支援資料至在該存取點涵蓋區域内操作的複數益 線傳送/接收單元(WTRUS )。 2·如申請專利範圍第i項所述之存取點,其中該支援資料係 由操作及維護(OAM)取得。 3. 如申請專利範圍第i項所述之存取點,其中該支援資料係 由在該存取點與該鄰近存取點間發出訊號取得。 4. 如申請專利範圍第3項所述之存取點,其中該發出訊號係 為專有的。 5·如申請專利麵3項所述之存取點,其中該發出訊號係 使用存取點間協定(IAPP)而執行。 6.如申請專纖㈣6顧述之存取點,其巾該支援資料係 17 M278165 94 7. -7 掃描除了由該存取點所使用外之信道而取^—- 7. 如申請專纖_ 6項所述之存取點,其中該掃描係為被 動掃描。 8. 如申請專纖圍第6項所述之存取點,其中該掃描係為主 動掃描。 9·如申請專利範圍第i項所述之存取點,其中該支援資料係 由取得以該存取點涵蓋區域操作之败取之測量而取 得。 瓜如申請專利範圍第1項所述之存取點,其中該支援資料 包含鄰近WTRUs及棘關操作辭,知轉該支援 資科。 u.如申請專利範圍第}項所述之存取點,其中 必含,鄰近存取輯制的魏m碌縣支I資 科。 12. 如申請專利範圍第!項所述之存取點,其中該支援資料 包含,鄰近存取闕計時魏,藉以取得該支援資料、。 13. 如申請專利範圍第⑺所述之存取點,其中該支援資料 包含,鄰赫取關崎魏,如取縣支援資料。 14. 如H1!圍第1項所述之存取點,其中該支援資料 .以/預汉的時間週期倍數傳送,且—作椤係由飞疒取點 戶斤傳送0 '、口只子”,、 0.如申糊侧述之存取點,射該支援資料 18 M278165 修正 J4. 7· -7 本年Λ Ή 補充 係與該信標分別地傳送。 16. 如申請專利範圍第14項所述之存取點,其中該支援資料 係自該信標一起傳送。 17. 如申請專利範圍第16項所述之存取點,其中該支援資料 係以一資訊成分的形式加至該信標,其中該支援資料與信 標為一起傳送。 18. 如申請專利範圍第1項所述之存取點,其中該支援資料 係用以促進該WTRU之漫遊。 19. 如申請專利範圍第1項所述之存取點,其中該支援資料 係以一廣播訊息傳送。 20. 如申請專利範圍第1項所述之存取點,其中該支援資料 係以一多路廣播訊息傳送。
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