TWI261983B - Physical layer automatic repeat request (ARQ) - Google Patents
Physical layer automatic repeat request (ARQ) Download PDFInfo
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- TWI261983B TWI261983B TW091119054A TW91119054A TWI261983B TW I261983 B TWI261983 B TW I261983B TW 091119054 A TW091119054 A TW 091119054A TW 91119054 A TW91119054 A TW 91119054A TW I261983 B TWI261983 B TW I261983B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0033—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter
- H04L1/0034—Systems modifying transmission characteristics according to link quality, e.g. power backoff arrangements specific to the transmitter where the transmitter decides based on inferences, e.g. use of implicit signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2612—Arrangements for wireless medium access control, e.g. by allocating physical layer transmission capacity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1809—Selective-repeat protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1845—Combining techniques, e.g. code combining
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L2001/0092—Error control systems characterised by the topology of the transmission link
- H04L2001/0096—Channel splitting in point-to-point links
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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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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Detection And Prevention Of Errors In Transmission (AREA)
- Mobile Radio Communication Systems (AREA)
- Communication Control (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Small-Scale Networks (AREA)
- Radio Relay Systems (AREA)
Description
if. 24 Ϊ2619
號 91119054 曰 修正 五、發明說明(1) 發明所屬之技術領域 本發明係有關於無線通訊系統。更明確地,本發明 係有關於一種運用一實體層(PHY)自動重複要求(ARQ)方 案來對該系統實施之修飾。 先前技術 提出在 時,利用單 (OFDM)方法 應用將以高 一建築物或 且作為一單 大,使單一 目前提 糸統。無法 層再次發送 以高訊號雜 (BLER)被接 訊號通常較 使用一高速向下連結封包存取(HSDPA)應用 一載波-頻域等化(SC-FDE)或正交分頻多重 之寬頻固定無線存取(BF W A )通訊系統。這種 速度來發送向下連結封包資料。在B F W A中, 整群建築物係藉無線式或有線式互相連接, 一用戶站地運作。這種系統之資料量需求極 站多重用戶者需要大頻寬。 出之系統係運用一第二層自動重複要求(ARQ) 成功發送至用戶之封包將緩衝暫存且自第二 。儲存於第二層中之資料區塊典型地較大、 訊比(S N R )接收而被發送、藉一低區塊誤差率 收且不常被重新發送。此外,第二層A R Q發出 為緩慢,而需要大的緩衝暫存器及長的再次 發送間隔。 緣是,亟需具有除了第二層ARQ系統以外之變型。 内容 一實體層自動要求重複系統包括一發送器及一接收 器。該發送器處之一實體層發送器係接收資料且將該接
第6頁 u 24年 126 ΐ
案號 91119054 修正 五、發明說明(2)
收到之資料格式化成具有一特殊編碼/資料調變的複數個 封包。該實體層發送器包含η個頻道,以發送該等封包及 因應未接收到一給定封包之一相對應確認訊息而再次發 送封包。該發送器中之一適應性調變及編碼控制器係收 集再次發送之統計且使用該收集到之統計來調整該特殊 編碼/資料調變。該接收器具有一實體層η -頻道接收器, 以接收該等封包。該接收器包含一η -頻道混合ARQ組合 器/解碼器,且該ARQ組合器/解碼器係用於組合封包發 送、解碼封包及偵測封包誤差。該接收器包含一確認訊 息發送器,用於當一封包具有一可接受誤差率時,發送 對於該封包之一確認訊息。該接收器包含一依序(i η -sequence)輸送元件,以將可接受之封包輸送至較高層。 實施方式 第一A圖與第一B圖係分別顯示一向下連結實體ARQ 1 0與一向上連結實體ARQ 20。
向下連結實體ARQ 1 0包括自設於網路14中之較高層 A R Q發送器1 4 a接收封包的一基地台1 2。來自較高層A R Q發 送器14a之封包將施加至基地台12中之實體層ARQ發送器 12a。實體層ARQ發送器12a係藉一前向誤差校正(FEC)編 碼、附加誤差檢查序列(E C S )、藉由適應性調變及編碼 (AMC)控制器1 2c導引且使用二元相移鍵控(BPSK)、正交 相移鍵控(QPSK)、或m元正交振幅調變(亦即16-QAM或64 -Q A Μ)來調變資料。此外,對於正交分頻多重存取 (OFDMA),實體層AMC控制器1 2c可改變用於運載封包資料
第7頁 年 月 曰 修- 五、發明說明(3) 之子頻道。實體層ARQ發送器1 2 a係藉由開關、循環器 (c i r c u 1 a 1: 〇 r )或雙工器12(1以及天線13,而經由空氣介面 4發送封包至用戶單元1 6。倘若必要時,實體層a r q發送 裔1 2 a亦暫日^地將需要再次發送之訊息儲存至包含於實體 層A R Q發送器1 2 a中的一緩衝暫存記憶體内。 用戶單元1 6之天線1 5係接收封包。封包係經由開 關、循環器或雙工器1 6 b而輸入至實體層A R Q接收器! 6 a 中。封包將在實體層ARQ接收器1 6a中被FEC解碼且使用 E C S檢查誤差。實體層a R Q接收器1 β a接著將控制確認可訊 息ACK發送器16c,以確認(ACK)接收到具有一可接受誤差 率之一封包、或著藉由較佳地抑制一確認訊息訊號或發 送一負確認訊息(N A K )來要求再次發送。 、,ACK係藉ACK發送器1 6c、經由開關1 6b及天線1 5而發 达至基地台12 °ACK係藉由空氣介面4而發送至基地台12 之天線13。接收到之ACK係由該基地台内之一ACK接收器 1 2 b處理A C K接收裔、1 2 b係將A C K / N A K輸送至適廡性調變 碼(AMC)控制器12c以及實體層ARQ發送器12a。AMC控 制裔1 2 c將利用接收到之ACK的統計來分析連接至用戶單 的頻道品質,且可改變後續訊息發送之FEC編碼及調 術這將於後作更詳細說明。倘若用戶單元1 6確認 勒,收到之封包,則在基地台1 2處接收到該ACK時將清除 $ :儲存於一緩衝暫存記憶體中之原始封包,以 供次一封包使用。 干 旅、、,ΐ右未接收到任何ACK或接收到一NAK,則實體層ARQ 呶迗益1 2a將再次發送原始訊息或原始訊息之選擇性修飾
92. if, 24-11- ^1261983
Li 案號 91119054 年:月 (ii- 修正 五、’發明說明(4) 型式至用戶單元16。倘若可取得,則在用戶單元16處, 再次發送將與原始發送組合。藉由使用資料備援或選擇 重複組合,這種技術將有助於接收一正確訊息。具有一 可接受誤差率之封包將傳送至較高層1 6 d,以實施更進一 步處理。該可接受之接收封包係以與提供至該基地台内 實體層ARQ發送器1 2a之資料者相同的資料順序輸送至較 高層1 6 d (亦即依序發送)。再次發送之最大次數係限制於 譬如介於1至8範圍中之一使用者定義整數值。當已嘗試 最大次數之再次發送後,將清除該緩衝暫存記憶體以提 供次一封包使用。在該實體層處解碼使用小型封包之一 確認訊息,將可縮短發送延遲及訊息處理時間。 由於PHY ARQ係發生於該實體層處,因此一特定頻道 發生之再次發送次數、再次發送統計將可作為該頻道品 質之一良好度量基準。使用該再次發送統計,AMC控制器 1 2 c將可改變該頻道之調變及編碼方案,如第2圖中所 示。此外,該再次發送統計可組合譬如區塊誤差率(BER) 及區塊誤差率(BLER)等其他鏈結品質度量基準,藉由AMC 控制器1 2 c來測定該頻道品質且判定是否需要變更調變及 編碼方案。 為了闡明S C - F D E,可測量發生於一特定頻道之再次 發送,以產生再次發送統計、(6 0 )。關於是否變更調變 方案之一決策係利用再次發送統計來實施、(6 2 )。倘若 再次發送過量,則利用通常使資料傳送速率降低的一更 強健編碼及調變方案、(6 4 )。A M C控制器1 2 c可增加擴展 因數且使用更多碼來傳送封包資料。另一選擇或附加
第9頁 .»*Ui -•Η:·"**' ^用艽廣號 91119054 曰 修正 五、發明說明(5) 較低者,譬如由64元QAM至16元QAM或QPSK 〇倘苦^換^ 送率較低,則切換至一較高容詈之調#方宏、~z欠 QPSK 至1 6 元QAM 或 64 元 QAM > (66 至 地。該AMC控制器可由一高資料處理能力調變方案切 發送率較低,則切換至一較高容量之調變方案,遊 μ一 … 該決策較佳地言如由 再次發送率及譬如BER或BLER等由該接收器傳訊之、列用 結品質度量基準兩者、(6 2 )。該決策之限制係由其他鏈 作者設定。 〃統操 對於OF DMA,再次發送之發生係用於監測每—子, 之頻道品質。倘若一特定子頻道之再次發送率或再^頻乂道 送率/鏈結品質指示出不良品質,則可在〇FDM頻率集 選擇使該子頻道無效、(6 4 ),以排除在某些未來時τ門 期中使用這種不良品質之子頻道。倘若再次發送率^ $ 次發送率/鏈結品質指示出高品質,則可將先前已無3效之 一子頻道加回OFDM頻率集合、(66)。 使用再次發送之發生作為AMC基礎,將可提供每一使 用者彈性定匹配調變及編碼方案、與平均頻道狀況。此 外,再次發送率係對測量誤差以及來自用戶單元丨6之報 告延遲不敏感。 向上連結實體ARQ 20本質上係相似於向下連結實體 ARQ 10且包括一用戶單元26,在該用戶單元中,來自較 尚層28之一較南層ARQ發送器28a的封包係發送至實體層 ARQ發送器26a。訊息係經由開關26d、用戶天線25、及9空 氣介面4而發送至基地台天線23。AMC控制器26c可相同= 藉使用一頻道之再次發送統計來改變調變及編碼方案。 相似於圖1 A中貫體層a R Q接收器1 β a之實體層A r q接收
12619· 91119054 年月 曰 修正 五、發明說明(6) 器2 2 a係判定是否具有一可接受誤差率而需要再次發送。 確認訊息發送器將向用戶單元2 6報告狀態,而使實體層 ARQ發送器26a再次發送、或另一選擇為清除暫時儲存於 實體層ARQ發送器2 6 a處之原始訊息以準備自較高層2 8接 收次一訊息。成功接收之封包將發送至網路2 4以作進一 步處理。 儘管為了簡化而未顯示出,但該系統較佳地係用於 一 B F W A系統中之一 H S D P A應用,然而亦可使用其他實施。 該6?〜八系統可使用分頻雙工或分日夺雙工3(:-?0£或(^0从八。 在這種系統中,基地台及所有用戶皆位於固定位置中。 該系統可包括一基地台及眾多用戶單元。每一用戶單元 可服務譬如在一建築物中或複數個相鄰建築物内之多個 使用者。這些應用將因一用戶單元站具有眾多終端使用 者,而典型地需要一大的頻寬。 配置於這種系統中之一PHY ARQ係可由譬如媒體存取 控制器(MAC)等較高層穿透。結果。PHY ARQ可結合譬如 第二層等較高層ARQ使用。在這種情況下,該PHY ARQ將 在較高層A R Q上方減少再次發送。 第3圖係用於一PHY ARQ30之一N-頻道停止及等待結 構的圖式。實體層A R Q發送功能3 8可根據其使用向下連 結、向上連結、或兩者的PHY ARQ而設置於基地台、用戶 單元、或兩者中。資料區塊3 4 a係來自於網路。網路區塊 係置於一佇列3 4中,以在空氣介面4 3之資料頻道4 1上發 送。一 N -頻道排序器3 6係將區塊之資料依序地發送至N個 發送器40-1至40-n。每一發送器40-1至40-n皆連結資料
第11頁
η-Ι2β19|3 m K4m, 91119054 年…月 日 修、 五、發明說明(8) 利用一最大比率之符號組合來組合。接著再解碼該組合 訊號。 ”、、以、、、° 母一接收is 4 6 - 1至4 6 - η之A C K係在一快速回饋頻道 (FFC)45中傳送。快速回饋頻道(FFC)45較佳地係\"低1^延 遲時間頻道。對於一分時雙工系統,可在上游盥下游發 送之間的無功週期中發送ACK。FFC45較佳地伏^菩苴二 :二:”調變’以使對其他同頻帶發送之 2 4 了增Α這種FFC45之容量’可使用多重 ACK/妾收器56係偵測ACK且指示相對應之發送器 ^40-n疋否已接收到ACK。倘若未接收到ack,則將 ί Πί右:ΪΐΪ之封包可藉由AMC控制器12c、26。人之 私引而具有一不同的調變及編碼方案。 ACK,則發送器40 —丄M〇_n將白緩衝暫 心欠到 包且接受一後續封包以實施發送。 '中/月除先刖封 發送器及接收器之數量N係根據譬如頻 因,時間等各種設計考慮為基礎。對於上述之較佳 而言,較佳地係利用一 2 -頻道έ士構,曰目士 二、、、 個發送器及接收器。且具有偶數與奇數 相較於僅使用較高層ARQ之一系統,較佳且體 術係、提供一7db以之訊號雜m比(·):這 ^因為其操作於較早獨貫施較高層AQR者更 率(BLER)(5%至20%BLER)且使用更小的第一声H差 減低之SNR需求允許:藉由運用一適應性調變曰及編碼、。
92.12619 號 9Π19054 年 !月夕仏日 修正 五、發明說明(9) (A M C )技術切換至高階調變以增大容量;藉由使用較低階 RF(無線電頻率)組件及藉PHY ARQ補償減低之實施性能以 降低用戶端設備(C Ρ Ε )成本;增加向下連結範圍而擴大胞 元(c e 1 1 )半徑;減少基地台(B S )中之向下連結功率以使 胞元-胞元干擾最小化;以及當運用一多重載波技術時, 增加功率放大器(PA)回退(back-off)。
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第14頁 _9_ __號 91119054 圖式簡單說明 年’月 修正 第一 A圖與第一B圖係向下 連結與向 上連結實體ARQ之簡 方塊圖。 第二圖係 使用再次發送統 計來適應 性調變及編碼的流程 圖。 第三圖係 元件符號 PHY ARQ 一多頻道停止及等待結構的方塊圖。 說明z 實體層 自動重複要求 SC-FDE OFDM 單一載波頻域等 正交分頻多重 化 BFWA 寬頻固定無線存取 HSDPA 高速向下連結封 包存取 SNR 訊號雜訊比 BLER 區塊誤差率 ACK 確認 MACs 媒體存取控制器 NAK 負確認 FEC 前向誤差校正碼 ECS 誤差檢查序列 AMC 適應性調變及編碼 layer 1 第一層 layer 2 第二層 1 6d,28 較高層 10 向下連結實體ARQ 12 基地台 12a 實體層ARQ發送器 1 2b,26b ,5 6 A C K接收 器 1 2 c ,2 6 c AMC控制器 1 2d 循環器\雙工器\開關 1 3,1 5,2 5 天線 1 4,2 4 網路\空氣介面 4 ,43 空氣介面
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91119054 年^月 修正 圖式簡單說明 1 4 a 較高層A R Q發送 器1 6, 26 用戶單元 16a ,22a 實體層ARQ接收器 16b 循環器\雙工器\開關 16c ,2 2 b A C K發送器 20 向上連結實體ARQ 2 6a 實體層ARQ發送器 26d 開關 28a 較高層A R Q發送器 30 PHYARQ 38 實體層ARQ發送功 能^^八㈣發送器 34 4宁歹ιΐ 34a 貢料區塊 36 N頻道排序器 41 資料頻道 40-1 至4 0 - η 發送器 45 快速回饋頻道(F F C ) 46-1 至4 6 - η 接收器 50 混合ARQ解碼器 54 ACK發送器 50- 1至5 0-n 混合ARQ解碼 第16頁
Claims (1)
- 吸η…修止 _91119054_Ά 年 η 月)l/日 修正_ 六、申請專利範圍 1 . 一種用於在一無線通訊系統中調整資料調變的方法, 該方法包括: 在一發送器處接收資料以發送至一接收器; 將該接收到之資料格式化成複數個封包以發送至該 接收器,其中每一該等封包皆具有一特殊編碼/資料 調變; 將該等封包發送至該接收器; 在該接收器處接收該等封包;對於每一該等接收到之封包,倘若該接收到之封包 具有一可接受誤差率,則將在一實體層處使用一快速回 饋頻道產生且發送一確認訊息; 倘若未接收到該封包之一確認訊息,則將在該發送 器處再次發送該接收到之封包; 收集再次發送之統計;及 使用該收集之再次發送統計來調整每一該特殊編碼/資料 調變。 2. 如申請專利範圍第1項之方法,其中該特殊編碼/資料 調變係前向誤差校正(F E C )編碼/資料調變。 3. 如申請專利範圍第2項之方法,其中該等封包係使用 一正交分頻多重存取(OFDMA)空氣介面來發送,且該特殊FEC編碼/資料調變調整係在一OF DMA集合中除了選擇的無 效子頻道以外處執行。 4. 如申請專利範圍第1項之方法,其中該等封包係使用 具有頻域等化之一單一載波(SC-FDE)空氣介面來發送。第17頁 十⑺儿秦號91119054 ,么年;,月,七’日 修正_ 六、申請專利範圍 5. 如申請專利範圍第1項之方法,其中該等確認訊息係 在該快速回饋頻道上使用一分碼多重存取(CDMA)空氣介 面發送。 6. 如申請專利範圍第1項之方法,其尚包括倘若某一該 等接收到之封包具有一不可接受誤差率,則將在該接收 器處發送該封包之一負確認訊息。 7. 一種實體層自動要求重複系統,其包括: 一發送器,其具有: 一實體層發送器,用於接收資料、將該接收到之 資料格式化成複數個封包且其中每一該等封包皆具有一 特殊編碼/資料調變、發送該等封包、且因應未接收到相 對應一給定封包之一相對應確認訊息而再次發送封包; 一 A C K接收器,用於接收該相對應確認訊息;及 一適應性調變及編碼控制器(A M C ),用於收集再次 發送之統計且使用該收集之統計來調整該特殊資料調 變;以及 一接收器,其具有: 一實體層接收器,用於解調該等封包; 一混合ARQ組合器/解碼器,用於緩衝暫存、解 碼、及偵測封包錯誤差;及 一確認訊息發送器,當某一該等封包具有一可 接受誤差率時,發送該封包之一確認訊息。 8. 如申請專利範圍第7項之系統,其中該特殊編碼/資料 調變係前向誤差校正(F E C )編碼/資料調變。第18頁 i'.m.., 1261 顧 Ί |————--—::二〜案號 91119054 丄年,月”」.日__ 六、申請專利範圍 9. 如申請專利範圍第8項之系統,其中該等封包係使用 一正交分頻多重存取(OFDM A)空氣介面來發送,且該特殊 FEC編碼/資料調變調整係在一OF DMA集合中除了選擇的無 效子頻道以外處執行。 10. 如申請專利範圍第7項之系統,其中該等封包係使用 具有頻域等化之一單一載波(SC-FDE)空氣介面來發送。 11. 如申請專利範圍第7項之系統,其中該等確認訊息係 在一快速回饋頻道上使用一分碼多重存取(CDMA)空氣介 面發送。 12. 如申請專利範圍第7項之系統,其尚包括倘若任何該 等封包具有一不可接受誤差率,則將在該接收器處發送 一負確認訊息。 13. 一種實體層自動要求重複系統,其包括: 一發送器,其具有: 一接收裝置,用於接收資料; 一格式化裝置,將該接收到之資料格式化成 複數個封包以發送至該接收器,其中每一該等封包皆具 有一特殊編碼/資料調變; 一發送裝置,將該等封包發送至一接收器; 一再次發送裝置,當未接收到其中一該等封 包之一確認訊息時,再次發送該封包; 一收集裝置,用於收集再次發送之統計;及 一調整裝置,使用該收集之再次發送統計來 調整每一該特殊資料調變;以及第19頁 12619ι.ϋ 4號 91119054 修正 六、申請專利範圍 該接收到之封 封包解碼且誤 認訊息。 14. 如申請專 料調變係一特 15. 如申請專 接收器,其 一接收裝 一裝置, 包具有 差檢查 用 正交分頻 利範圍 殊前向 利範圍 多重存 料調變 外處執 利範圍 殊FEC編碼/資 無效子頻道以 16. 如申請專 用具有頻域等化之 运 〇 1 7. 如申請專 係在一快速回 介面發送。 18. 如申請專 該等接收到之 收器處發送該 利範圍 饋頻道 具有: 置,用於接收該等封包;及 用於每一該等接收到之封包,倘若 一可接受誤差率,則對該接收到之 ,及在該實體層處產生且發送一確 第1 3項之系統,其中該特殊編碼/資 誤差校正(F E C )編碼/貢料調變。 第1 3項之系統,其中該等封包係使 取(OFDMA)空氣介面來發送,且該特 調整係在一OFDM A集合中除了選擇的 行。 第1 3項之系統,其中該等封包係使 單一載波(SC-FDE)空氣介面來發 第1 3項之系統,其中該等確認訊息 上使用一分碼多重存取(CDMA)空氣 利範圍 封包具 封包之一負確認訊 19. 一種運用寬頻固 一順序器, 仔列,以依序地傳遞 第1 3項之系統,其尚包括倘若某一 有一不可接受誤差率,則將在該接 定無線存取的通訊系統,其包括: 具有用於自網路接收資料區塊的一 封包至η個發送器;第20頁號 91119054修正 六、申請專利範圍 一目標裝置,具有η個接收器,每一該等接收器 皆連結該η個發送器其中之一; η個混合ARQ解碼器,每一該等解碼器皆耦合該η 個接收器其中之一; 該η個發送器依序地經由一資料頻道發送至其相 關之η個接收器; 該η個混合ARQ解碼器具有一回饋頻道,以將確 認訊息發送至其相關之發送器而控制再次發送,以及當 已接收到一可接受誤差率封包時,提供一確認訊息訊號 至其相關之發送器;及該η個混合解碼器係將具有一可接受誤差率之封 包釋放。 20. 如申請專利範圍第1 9項之通訊系統,其中每一該η個 訊號發送器皆將業已發送之一封包暫時地儲存於一緩衝 暫存記憶體中;及 當該η個發送器其中之一接收到來自一相關混合解碼器之 一確認訊息訊號時,將清除該儲存之封包,以準備接收 另一區塊。2 1. 如申請專利範圍第1 9項之通訊系統,其中每一該η個 發送器皆將業已發送之一封包暫時地儲存於一緩衝暫存 記憶體中;及 當該η個發送器其中之一未能接收到來自其相關解碼器之 一確認訊息訊號時,將再次發送暫時儲存於其緩衝暫存 記憶體中之該封包。第21頁 養號91119054 b 年’;月.、乂::日 修正_ 六、申請專利範圍 2 2. 如申請專利範圍第1 9項之通訊糸統’其中倘若該η個 發送器其中之一在一最大次數再次發送後仍未自其相關 解碼器接收到一確認訊息,則將清除其緩衝暫存記憶 體。 2 3. 如申請專利範圍第1 9項之通訊系統,其中該最大次 數再次發送係由一操作者定義之介於1至8範圍中的整 數。 24. 如申請專利範圍第1 9項之通訊系統,其中需要一再 次發送之該η個接收器其中之一係將一再次發送封包與一 原始發送封包組合,以有助於誤差校正。 25. 如申請專利範圍第1 9項之通訊系統,其中未能自一 相關解碼器接收到一確認訊息訊號之一發送器係運用一 編碼技術來編碼該封包,其中該編碼技術係不同於該封 包一原始發送中所運用者。 2 6. 如申請專利範圍第1 9項之通訊系統,其中該η個發送 器係運用加速編碼,且該解碼器係運用一原始發送與一 再次發送之編碼的組合,以有助於誤差校正。 2 7. 如申請專利範圍第1 9項之通訊系統,其中該η個發送 器其中之一係包含於一基地台中,且該η個接收器係包含 於一用戶單元中。 28. 如申請專利範圍第1 9項之通訊系統,其中該η個發送 器係包含於一用戶單元中,且該η個接收器係包含於一基 地台中。 2 9. 如申請專利範圍第1 9項之通訊系統,其中該等封包12619: 91119054 年,,月-; 曰 修正 六、申請專利範圍 係使用一正交分頻多重存取(OFDM A)空氣介面來發送,其 中一 OF DMA集合中之複數個頻率子頻道可選擇性地無效。 30. 如申請專利範圍第1 9項之通訊系統,其中該等封包 係使用具有頻域等化之一單一載波(S C - F D E )空氣介面來 發送。 3 1. 如申請專利範圍第1 9項之通訊系統,其中該等確認 訊息係在一快速回饋頻道上使用一分碼多重存取(C D Μ A ) 空氣介面發送。第23頁
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TW092128225A TWI282693B (en) | 2001-08-24 | 2002-08-22 | Physical layer automatic repeat request (ARQ) system |
TW096116723A TW200814600A (en) | 2001-08-24 | 2002-08-22 | Physical layer automatic repeat request (ARQ) |
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