TW200423773A - Point to multi-point services using high speed shared channels in wireless communication systems - Google Patents

Point to multi-point services using high speed shared channels in wireless communication systems Download PDF

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TW200423773A
TW200423773A TW092129829A TW92129829A TW200423773A TW 200423773 A TW200423773 A TW 200423773A TW 092129829 A TW092129829 A TW 092129829A TW 92129829 A TW92129829 A TW 92129829A TW 200423773 A TW200423773 A TW 200423773A
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service
dsch
users
user
group
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TW092129829A
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TWI287935B (en
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Stephen E Terry
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Interdigital Tech Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/121—Wireless traffic scheduling for groups of terminals or users
    • 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
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • 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
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • 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
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041—Arrangements at the transmitter end
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/04—Error control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/08—User group management
    • 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
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • 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]
    • H04L1/1819—Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • 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
    • H04L2001/0093—Point-to-multipoint
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543—Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)
  • Telephonic Communication Services (AREA)

Description

200423773
發明領域 特別是本發明係關 本發明一般係關於無線通訊系統 於此種系統中的點對多點服務。 背景 在無線通訊系統中愈來愈希望使用點 第1圖所示’在點對多點，一種服務係自 如 少、、,γ h T 點’如展地 二立达至夕點，如用戶設備。點對多點服務例 體廣播及群播服務。 Μ例為夕媒 在第三代夥伴專案（3GPP)提出系統，可 卜 :務個道為轉送接取頻道（Fach)。該_ 為一種下订共同傳輪頻道（TrCH)，其可由 收。紐CH TrCH藉由將其施用於次要共同㈣實吏體用頻者道接 (S-CCPCH)而被傳播。該s —ccpciHi傳送至所有胞元使用 者0 、為限制分配至該S-CCPCH的無線電資源，該s —ccpcH資 料速度被限制。為說明用途，若高資料速度服務在該s — CCPCH上被傳輸，則需要使用低資料冗餘來傳輸以達到高 ，速度。因該S-CCPCH係傳輸至整個胞元，其在所欲服務質 i ( Q0S )在忒胞元周圍足以由使用者接收的功率位準下傳 輸。在此功率位準下傳播高資料速度服務會增加至其他使 用者的介面，減少系統容量，其為非常不欲的。、 因該S-CCPCH及FACH的傳播本性，該S — CCPCH及FACH所 需的無線電資源為非常靜態的。該s —ccpcH所使用的調變及 編碼組（MCS )及傳輸功率位準需為足夠的以在該胞元周圍
第6頁 200423773
一種被提出用於3GPP系統的分享頻道為高速下行八古 頻道（HS-DSCH)。該HS-DSCHs為高速頻道，其為由胞7元子使 用者（用戶設備）時間分享。每一個傳輸之目標為個別使 用者且在該HS-DSCH上的每一個使用者之傳輸係由時八 開。 」刀 至一個使用者的該HS-DSCH傳輸伴隨著上行及下行專屬 控制頻道。每一個使用者經由在上行控制頻道發訊號的層！ 及層3傳送測量，使用這些測量，一種調變及編碼組 (MCS )被選擇以用於此使用者的傳輸。該MCS可每2至1〇毫 秒，化》經由小心選擇使用者傳輸的Mcs，最不穩健性（最 低貧料冗餘）MCS可被選擇以維持所欲服務質量（Q〇s )。 結果’無線電資源被更有效地利用。 ▲為決定何時特定使用者的傳輸可在該HS-DSCH上傳送， 2使用者首先在該下行控制頻道組尋找其被編碼在循環冗 ^馬\CRC )的UE ID及解碼該下行控制頻道以得到以-⑽⑶ 二配貝料。在一預定期間後，該UE接收該HS —DSCH而得到具 八UE ID的封包及解碼該封包以接收使用者資料。 雖然該HS —DSCH允許無線電資源的更有效利用，但僅點 =點服務可由該HS-DSCH處理。為處理多重接收點，多重傳 須在該HS - DSCH上進行。此種多重傳輸使用大量的無線 電貧源，其為不欲的。 因此，希望具一種彈性機構以提供點對多點服務。
第7頁 200423773
服務育料係在無線通訊系統被傳輸， 傳輸以由在該系統胞元的一組使用者接 二服務辨識碼 包括胞元的所有使用者。該組使用者的每使用者不 辨識碼。該組使用者的每一個監 個接收該服務 (HS-DSCH )傳送的第二服務辨識碼，該H行=享頻道 服務辨識碼在該HS_DSCH傳送。該組使用者==係以弟= 二服務辨識碼及接收該HS-DSCH的服務資料。母個偵測第 車父佳具體貫施例詳細救述 、 雖然 述，它們 使用。 該較佳具體實施例係以較佳的3Gpp提出系統敘 可與其他使用點對多點傳輸的無線電系統一起被 第2圖為較佳的hs-DSCH 16及其附屬下行控制頻道η以 用於傳輸點對多點（PtM )服務的說明。在第2圖中、，一組 使用者UE 1 l2l……UE J 12;.....UE N 12N要接收在該 HS-DSCH 16的服務。一種下行共同控制頻道（ccc) 13被用 來分配該HS-DSCH 16給使用者UE 1 12丨.....UE J 12j、 …、UE N 12N。該HS-DSCH 16由基地台1〇送出且由UEs 12厂 12N群接收。UEs如未登錄此服務的UE X 12¥不符合在CCC 13 上的服務識別碼。因此，此UE，UE X 1 2χ，未被構形為接 收該HS-DSCH 16的資料。 第3圖為Β節點18及UEs的其中一個，UE J ，以用於 在該HS-DSCH 16的傳送資料之簡化圖式。在B節點18，一種 下行控制頻道產生器24產生每一個UE i2i-12n的〇(：(：訊號。 對UE J 12】，在該CCC 13由天線32或天線陣列經由無線射
200423773 五、發明說明（4) 頻介面22射出後，此訊號由UE J 1 2】的天線34或天線陣列 接收且由CCC接收器3 6處理以回復頻道的控制資料，如該 H S - D S C Η 1 6的調變及編碼組。 一種HS-DSCH產生器26產生該HS-DSCH訊號以經由該無 線介面22傳送。該HS-DSCH訊號係使用其天線34或天線陣列 而由UE J 12】接收。該1^-03(：1116的資料藉由一種1^-03(：11 接收器38使用該CCC資料而被回復，一種頻道品質測量裝置 40拾取該HS-DSCH的頻道品質測量/資料，如訊號與介面比 (SIR )或字組錯誤率（bleR )。頻道品質亦可由該下行附 屬專屬頻道而得到。該測量/資料藉由上行實體控制頻道 (CCC )傳送器，或藉由層3發訊號步驟而傳送至該B節點 18。 * 此外，一種在用戶設備1 2的自動回覆請求（ARQ )傳送 器41傳送確認應答（ACKs)及否定ACKs (NAKs)，其顯示 該HS-DSCH資料是否已成功接收。一種在b節點丨8的人叫接收 器31接收該ACK及NAKs，若一個NAK由該HS-DSCH傳輸使用者 的任一個接收，則典型上該HS —DSCH傳輸被重覆，該b節點 18為所有使用者檢查該ACKs/NAKs。典型上，若任何使用者 傳送NAK，則重新傳輸被進行。然而，若僅有一些超過定限 的NAKs，則重新傳輸僅會被促使。典型上，對重新傳輸的 時間限制被設定，較佳為，該UEs 12 ACKing忽略後續重 傳輸，節省其功率。 一種在該β節點1 8的頻道品質測量處理器3〇自所有該 HS-DSCH的使用者回復該頻道品質測量/資料。一種調變及
200423773 五、發明說明（5) ~ - 編碼組（MCS)選擇裝置28使用自每一個已登錄以接收該 P t Μ服務（使用者群）的使用者的該頻道測量/資料以選擇 該HS-DSCH傳輸的MCS。較佳為所選擇的MCS為最不穩健性 (最高資料速度）使頻道條件允許具最差的已接收經測量 HS-DSCH訊號品質的在此PtM使用者群的使用者可進行工 作。雖然可使用更長時間範圍，較佳為該Mcs在每個傳輸 間間隔（ττι )被更新。該ccc產生器24產生該⑶^^，其顯示 至⑽il2i.....UE J 12;.....UE N 12N的已選擇MCS以 進行该HS-DSCH的適當接收。該HS — DSCH產生器26使用已 擇的MCS產生該HS-DSCH 16。 、 、對具多重子資料流的服務，各種子資料流的傳輪特性 可被個別處理。為說明用途，多媒體服務可具音聲、影像 及内文子資料流。每一個子資料流的Q〇s可為不同使得不同 傳輸屬性可由每一個子資料流使用。此方法可得到更佺的 資源效率，每一個子資料流可被個別處理而非傳輸每一個 子資料流以符合最高的Q0S子資料流要求。對每一個子資料 流，該字組錯誤率（BLER )與BLER品質目標被比較。、’ 第4圖為B節點18的較佳調度機構的簡化方塊圖式。該 調度機構46較佳為被用來調度每一個TTI的資料，雖然可使 用較長的調度時間。該調度機構46接收要在該Hs —dsc'h傳輸 的點對點（PtP )及ptM資料。該調度程式決定在下一個ττι
那一個使用者接收PtP傳輸及那一個使用者群接收ptM 輸。 在較佳時間期間調度資料傳輸可得到更有效的音聲資
200423773
源利用。為說明用途，在特定TTI，少量資料可用於 PtP傳輸，因在該TTI上音聲資源的增加、 =構Π加經由該HS__頻道傳輸的ptMf料量U 土 ’备PtM貝料未被提供時，該調度程式46可選擇傳輸Μ? ^務服務另的—Λ調度標準為Qos屬性，如傳輸延遲及/或ΡΐΡ或 ΓΛη : 量要求。基於ΤΤΙ基準的調度提供達到這 些要求同七維持HS-DSCH胞元資源的高利用率的更大能力❶ 該調度程式46亦可考慮實體傳輪要求。例如，一 用者或使用者群會要求較另一個更為穩健性的Mcs。在下一 個TTI_，資源可能僅提供給較少穩健性腦，之後，兮 調度程式46再調度PtP使用者或ptM使用者群的傳輸以最大以 化提供資源的使用。因提供用於傳輸的資料具特定q〇s要 求，提供的實體資源及頻道品質測量基kTT i基準變化， 此間隔内調度的能力改良滿意使用者的數目及實體資 整體利用及有效使用。 、μ 該調度程式46亦自在PtM使用者群的所有使用者得到 ACK/NAK反饋及調度重新傳輸直到所有使用者籍由傳送κκ 顯示傳輸的成功接收，或某定限被達到，或是服務傳輸 間限制達到或是重新傳輸限制達到。此方法的優點為僅錯 誤的PtM服務之部^份被重新傳輸，而非重新傳輸整個服務曰傳 輸。較佳為’先鈾產生ACK的使用者忽略任何重新傳輸。 此方法的優點為基於TTI基準在PtP及PtM服務間動態地 調度之能力而非以層3步驟調度s-CCPCH，層3步驟需要f〇〇 多毫秒至數秒大小以進行頻道分配，此提供改良q〇s及實體
200423773 五、發明說明（7) 資源管理。此外，其允許UE接收多重服務而不需具同時頻 道接收的容量，因重疊的實體分配可被避免，此多重服務 可由時間分開。 B節點18在該CCC 13發訊號至該UEs 12厂12N，頻道構形 為UE 12^12〃資料可被傳送。藉由最大化無線電資源的使 用，每一個TTI的較佳調度減少在服務間的資源衝突，此頻 道的分配經由該下行CCC使用發訊裝置48送訊號至使用者。 若無該機構46 ’典型上，頻道無法在TTI上被重新分配且結 果為維持Q0S及實體資源的高利用及有效使用之能力被限 制。 第5A及5B圖為該HS-DSCH 16的較佳HS-DSCH發訊之說 明。在第5 A圖，藉由偵測伴隨所有服務使用者的Pt μ服務j D 51，PtM使用者群的每一個UE 12ι —12n被告知服務傳送。該 服務ID 51係在該下行共同控制頻道13被編碼。在預先決定 時間期間後，使用者接收該經授權服務的!^ —DSCH。 在第5B圖，藉由偵測伴隨UEs，UE群ID 1 53iSlJE群ID N 53N的ID，每一個UE 12广12“皮告知服務傳送，其係編碼 在邊下行共同控制頻道1 3。在預先決定時間期間後，使用 者接收由該CCC 13顯示的該HS-DSCH 16以得到具經授權服 務的服務ID之封包。 八、 > η第6圖為建立及傳送在HS-DSCHs上點對多點服務的較佳 吼號的說明。該RAN 7〇發訊號至每一個使用者以接收該傳 輸74的輸送屬性之服務。每一個使用者構形其本身以接收 該傳輪及監看該CCC的PtM服務ID群，72。傳送用做點對多
200423773 五、發明說明（8) 點服務的資料藉由UMTS無線電存取網路（utra 〇 接收。在該CCC上的服務/群/ UE ID顯示在訂以“ 曰後，該HS-DSCH傳輸會很快發生在特定“ —DSCH實體 道，在接收該CCC後，每一個使用者構形其兮 HS-DSCH傳輸。 巧牧叹。亥 母一個使用者可以層3發訊號步驟送出頻道品質資料仏 該RAN 70，76。該頻道資料的傳送亦可藉由實體層發訊、。 號’以m為基準報告，78。使用在每一個ptM使用者群的 所有使用者的該頻道品質資料，該RAN 70決定至每一 使用者群的HS-DSCH傳輸的合適MCS。為說明用途’該r 70典型上會設定該MCS在由具最差接收品質的使用者可於 欲QOS接收的一種位準。為最適化無線電資源的使用，雖】 在更新間可使用更長時間範圍，較佳為這些參數在時、 間傳送間隔（TTI )被更新。 — ^ 該UTRAN 70同時進行該HS_DSCH分配，82 ’且每一 12構形該HS-DSCH接收，84。服務資料在該HS_DSCH上傳送E 86。在該HS-DSCH上傳送的服務資料由該⑽12接收。鑑定 後，該服務資料被向前送至共同通訊頻道，較佳結構允 在分享或專屬頻道如PtM或PtP傳輸上轉移共同通訊頻道資 料之弹性。此對映在無線介面的傳輸側及接收側上皆執 行。 第7圖為在無線電網路控制器19及此12比值下的較佳 頻道對映之說明。PtM資料到達在共同通訊頻道（ctch RNC，該CTCH對映在該HS-DSCH上以在 的
第13頁 200423773 五、發明說明（9) PDSCH )上傳送至使用者。一個UE 12於此處被說明且典型 上多重UEs接收該HS-DSCH傳輸。UE 12接收該HS-PDSCH及對 映該HS-DSCH至該CTCH以由該UE 12處理。
第14頁 200423773 圖式簡單說明 弟1圖為里上染丄# … ’ 4對多點服務的說明。 圖為較佳的HS-DSCH及相關控制頻道的說明。 f 3圖為較佳的B節點及用戶設備的簡化圖式。 圖為具較佳的HS-DSCH的調度機構之較佳β節點的簡化圖 第5Α圖 第6圖為 之說明 、第5Β圖為HS-DSCH的較佳HS-DSCH訊號的飞明 建立及傳輸在HS-DSCH上點對多點服務的較佳訊號 第7圖為藉由無線電網路控制器及用 DSCH上點對多點服務的頻道對映之說明。備執行的在HS-元件符號說明 12 用戶設備 22 無線射頻介面 24 CCC產生器 26 HS-DSCH產生器 28 MCS選擇裝置 3 0 頻道品質測量處理器 31 ARQ接收器 36 CCC接收器 38 HS_ DSCH接收器 3 9 上行控制頻道傳送器 4 0 頻道品質測量裝置 200423773 圖式簡單說明 41 ARQ傳送器 46 調度機構 48 發訊號裝置 5 3! ，53n UE群 72 構形服務傳輸的UE及監看服務ID的CCC 74 至使用者的訊號輸送屬性 76 ，78 頻道品質訊息 80 決定HS-DSCH 的MCS 82 同時進行HS-DSCH分配 84 構形 HS-DSCH 86 在HS-DSCH傳送服務資料 88 接收在HS-DSCH的服務資料及向前送至共同通訊 頻道
第16頁

Claims (1)

  1. 200423773 六、申請專利範圍 1括:種在無線通訊系統中傳輪服務資料的方丨，該方法包 錄至一服務的識碼，以讓登 所有使用者； 使用者不包括胞元的 =ί ί之各使用者接收該服務識別碼； 回速下行分享頻道（Hs 一 Dsc ^ 務辨識喝之服務的服務資料H H弟二服 由《亥組之各使用者偵測該第 高速下行頻道中所傳輪之該服；資：碼接收在該 2括項二’，中該第-服務辨識碼包 組使用者為以複數個服務辨識符以相異之- 3【如Π專利範圍第1項之方法，其中該組之各使用者被送 至一相同之第一服務辨識碼。 第17頁
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