CN2759085Y - 能支持使用高速频道的点对多点服务的b节点 - Google Patents

能支持使用高速频道的点对多点服务的b节点 Download PDF

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CN2759085Y
CN2759085Y CNU032465645U CN03246564U CN2759085Y CN 2759085 Y CN2759085 Y CN 2759085Y CN U032465645 U CNU032465645 U CN U032465645U CN 03246564 U CN03246564 U CN 03246564U CN 2759085 Y CN2759085 Y CN 2759085Y
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史蒂芬泰利
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/20Arrangements for detecting or preventing errors in the information received using signal quality detector
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/30Resource management for broadcast services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026Transmission of channel quality indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/004Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0041Arrangements at the transmitter end
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements 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
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H04L1/1819Hybrid protocols; Hybrid automatic repeat request [HARQ] with retransmission of additional or different redundancy
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2854Wide area networks, e.g. public data networks
    • H04L12/2856Access arrangements, e.g. Internet access
    • H04L12/2858Access network architectures
    • H04L12/2861Point-to-multipoint connection from the data network to the subscribers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/04Error control
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
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    • H04W4/08User group management
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/08Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L2001/0092Error control systems characterised by the topology of the transmission link
    • H04L2001/0093Point-to-multipoint
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/543Allocation or scheduling criteria for wireless resources based on quality criteria based on requested quality, e.g. QoS

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Abstract

一种B节点包括共通控制频道产生器,该共通控制频道产生器产生一种用于许多使用者的共通控制频道并在该共通控制频道传送服务识别符。一种高速下行分享频道产生器(HS-DSCH)在经选择的调变及编码组(MCS)产生HS-DSCH且在该HS-DSCH上传送服务识别符,在该HS-DSCH显示点对多点服务的传送,该点对多点服务同时在该HS-DSCH上传送至多个使用者。该HS-DSCH产生器重新传送该点对多点服务的数据以响应自动回复请求接收器。一种频道品质测量处理器接收来自许多接收该点对多点服务的使用者的频道品质测量。一种耦合至该频道品质测量处理器的MCS选择装置使用该频道品质测量选择经选择的MCS。该自动回复请求接收器接收回复请求及天线射出该HS-DSCH及共通控制频道。

Description

能支持使用高速频道的点对多点服务的B节点
(1)技术领域
本发明有关一种无线通讯系统,特别是有关此种系统的点对多点服务。
(2)背景技术
在无线通讯系统中愈来愈希望使用点对多点服务,如图1所示,在点对多点,一种服务是自单一点,如基地台,送至多点,如用户设备。点对多点服务的实例为多媒体广播及群播服务。
在第三代伙伴项目(3GPP)提出系统,可被用于此种服务的一个经提出频道为转送接取频道(FACH)。该FACH为一种下行共通传输频道(TrCH),其可由所有使用者接收。该FACH TrCH藉由将其施用其于次要共通控制实体频道(S-CCPCH)而被传播。该S-CCPCH被传送至所有单元使用者。
为限制分配至该S-CCPCH的无线电资源,该S-CCPCH数据速度被限制。为说明,若高数据速度服务在该S-CCPCH上被传输,则需要使用低数据冗余来传输以达到高数据速度。因该S-CCPCH是传输至整个单元,其在所欲服务质量(QOS)在该单元周围足以由使用者接收的功率位准下传输。在此功率位准下传播高数据速度服务会增加至其它使用者的接口,减少系统容量,其为非常不欲的。
因该S-CCPCH及FACH的传播本性,该S-CCPCH及FACH所需的无线电资源为非常静态的。该S-CCPCH所使用的调变及编码组(MCS)及传输功率位准需为足够的以在该单元周围维持所欲的QOS。
一种提出用于3GPP系统的分享频道为高速下行分享频道(HS-DSCH)。该HS-DSCHs为高速频道,其为由单元使用者(用户设备)时间分享。每一个传输的目标为个别使用者且在该HS-DSCH上的每一个使用者的传输是由时间分开。
至一个使用者的该HS-DSCH传输伴随着上行及下行专属控制频道。每一个使用者经由在上行控制频道发信号的层1及层3传送测量,使用这些测量,一种调变及编码组(MCS)被选择用于此使用者的传输。该MCS可每2至10毫秒变化。经由小心选择使用者传输的MCS,最不稳健性(最低数据冗余)MCS可被选择以维持所欲服务质量(QOS)。结果,无线电资源被更有效地利用。
为决定何时特定使用者的传输可在该HS-DSCH上传送,该使用者首先在该下行控制频道组寻找其被编码在循环冗余码(CRC)的UE ID及译码该下行控制频道以得到HS-DSCH分配数据。在一预定期间后,该UE接收该HS-DSCH而得到具其UE ID的封包及译码该封包以接收使用者数据。
虽然该HS-DSCH允许无线电资源的更有效利用,但仅点对点服务可由该HS-DSCH处理。为处理多重接收点,多重传输必须在该HS-DSCH上进行。此种多重传输使用大量的无线电资源,其为不欲的。
(3)实用新型内容
因此,本实用新型的目的是提供一种弹性机构以提供点对多点服务。
为实现上述目的,本实用新型提供一种能支持使用高速频道的点对多点服务的B节点,其特点是,包括:一种高速下行分享频道产生器,其耦合至一调变及编码组选择装置与一自动回复请求接收器,以在经选择的调变及编码组产生高速下行分享频道且在该高速下行分享频道产生器上传送服务识别符,显示在该高速下行分享频道产生器上的点对多点服务的传输,该点对多点服务同时在该高速下行分享频道产生器上传送至多个使用者,及重新传送该点对多点服务的数据以响应自动回复请求接收器;一频道品质测量处理器以接收来自许多接收该点对多点服务的使用者的频道品质测量;该调变及编码组选择装置耦合至该频道品质测量处理器,以使用该频道品质测量选择经选择的调变及编码组;一共通控制频道产生器,其耦合至该调变及编码组选择装置,以产生一用于许多使用者的共通控制频道并在该共通控制频道传输服务识别符;该自动回复请求接收器用以接收回复请求并提供所述请求至该高速下行分享频道产生器;及一天线,其耦合至该高速下行分享频道产生器与该共通控制频道产生器以射出该高速下行分享频道及共通控制频道、提供回复请求至该自动回复请求接收器以及提供频道品质数据至该频道品质测量处理器。
(4)附图说明
图1为点对多点服务的说明。
图2为较佳的HS-DSCH及相关控制频道的说明。
图3为较佳的B节点及用户设备的简化图式。
图4为具有较佳的HS-DSCH的排程机构的较佳B节点的简化图式。
图5A及5B为HS-DSCH的较佳HS-DSCH信号的说明。
图6为建立及传输在HS-DSCH上点对多点服务的较佳的信号的说明。
图7为藉由无线电网络控制器及用户设备执行的在HS-DSCH上点对多点服务的频道对映的说明。
(5)具体实施方式
虽然较佳具体实施例以较佳的3GPP提出系统叙述,它们可与其它使用点对多点传输的无线电系统一起被使用。
图2为较佳的HS-DSCH 16及其附属下行控制频道13以用于传输点对多点(PtM)服务的说明。在图2中,一组使用者UE 1 121、…、UE J 12J、…、UE N 12N要接收在该HS-DSCH 16的服务。一种下行共通控制频道(CCC)13被用来分配该HS-DSCH 16给使用者UE 1 121、…、UE J 12J、…、UE N 12N。该HS-DSCH 16由基地台10送出且由UEs 121-12N群接收。UEs如未注册此服务的UE X 12X不符合在CCC 13上的服务识别符。因此,此UE,UE X 12X,未被构形为接收该HS-DSCH 16的数据。
图3为B节点18及UEs的其中一个,UE J 12J,以用于在该HS-DSCH 16的传送数据的简化图式。在B节点18,一种下行控制频道产生器24产生每一个UE 121-12N的CCC信号。对UE J 12J,在该CCC 13由天线32或天线数组经由无线射频接口22射出后,此信号由UE J 12J的天线34或天线数组接收且由CCC接收器36处理以回复频道的控制数据,如该HS-DSCH 16的调变及编码组。
一种HS-DSCH产生器26产生该HS-DSCH信号以经由该无线接口22传送。该HS-DSCH信号是藉由使用其天线34或天线数组而由UE J 12J接收。该HS-DSCH 16的数据藉由一种HS-DSCH接收器38使用该CCC数据而被回复,一种频道品质测量装置40拾取该HS-DSCH的频道品质测量/数据,如信号与接口比(SIR)或字组错误率(BLER)。频道品质亦可由该下行附属专属频道而得到。该测量/数据藉由上行实体控制频道(CCC)传送器,或藉由层3发信号步骤而传送至该B节点18。
此外,一种在用户设备12的自动回复请求(ARQ)传送器14传送确认应答(ACKs)及否定ACKs(NAKs),其显示该HS-DSCH数据是否已成功接收。一种在B节点18的ARQ接收器31接收该ACK及NAKs,若一个NAK由该HS-DSCH传输使用者的任一个接收,则一般该HS-DSCH传输被重复,该B节点18为所有使用者检查该ACKs/NAKs。一般,若任何使用者传送NAK,则重新传输被进行。然而,若仅有一些超过定限的NAKs,则重新传输仅会被促使。一般,对重新传输的时间限制被设定,较佳为,该UEs 12 ACKing忽略后续重新传输,节省其功率。
一种在B节点18的频道品质测量处理器30自所有该HS-DSCH的使用者回复该频道品质测量/数据。一种调变及编码组(MCS)选择装置28使用自每一个已注册以接收该PtM服务(使用者群)的使用者的该频道测量/数据以选择该HS-DSCH传输的MCS。较佳为所选择的MCS为最不稳健性(最高数据速度),使频道条件允许具有最差的已接收经测量HS-DSCH测量品质的在此PtM使用者群的使用者可进行工作。虽然可使用更长时间范围,较佳为该MCS在每传输时间间隔(TTI)被更新。该CCC产生器24产生该CCC,其显示至UE 1 121、…、UE J 12J、…、UE N 12N的经选择MCS以进行该HS-DSCH的适当接收。该HS-DSCH产生器26使用经选择的MCS产生该HS-DSCH 16。
对具有多重子数据流的服务,各种子数据流的传输特性可被个别处理。为说明用途,多媒体服务可具音声、影像及内文子数据流。每一个子数据流的QOS可为不同使得不同传输属性可由每一个子数据流使用。此方法可得到更佳的资源效率,每一个子数据流可被个别处理而非传输每一个子数据流以符合最高的QOS子数据流要求。对每一个子数据流,该字组错误率(BLER)与BLER品质目标比较。
图4为B节点18的较佳排程机构的简化方块图式。该排程机构46较佳为被用来排程每一个TTI的数据,虽然可使用较长的排程时间。该排程机构46接收要在该HS-DSCH传输的点对点(PtP)及PtM数据。该排程程序决定在下一个TTI那一个使用者接收PtP传输及那一个使用者群接收PtM传输。
在较佳时间期间排程数据传输可得到更有效的音声资源利用。为说明用途,在特定TTI,少量数据可用于专属PtP传输,因在该TTI上音声资源的增加可提供性,该排程机构46可增加经由该HS-DSCH频道传输的PtM数据量。同样地,当PtM数据未被提供时,该排程程度46可选择传输PtP服务。另一个排程标准为QoS属性,如传输延迟及/或PtP或PtM服务的数据产量要求。基于TTI基准的排程提供达到这些要求同时维持HS-DSCH单元资源的高利用率的更大能力。
该排程程序46亦可考虑实体传输要求。例如,一个使用者或使用者群会要求较另一个更为稳健性的MCS。在下一个TTI期间,资源可能仅提供给较少稳健性MCS,之后,该排程程序46再排程PtP使用者或PtM使用者群的传输以最大化提供资源的使用。因提供用于传输的数据具特定QOS要求,提供的实体资源及频道品质测量基于TTI基准变化,在此间隔内排程的能力提高满意使用者的数目及实体资源的整体利用及有效使用。
该排程程序46亦自在PtM使用者群的所有使用者得到ACK/NAK反馈及排程重新传输直到所有使用者藉由传送ACK显示传输的成功接收,或某定限被达到,或是服务传输时间限制达到或是重新传输限制达到。此方法的优点为仅错误的PtM服务的部份被重新传输,而非重新传输整个服务传输。较佳为,先前产生ACK的使用者忽略任何重新传输。
此方法的优点为基于TTI基准在PtP及PtM服务动态地排程的能力而非以层3步骤排程S-CCPCH,层3步骤100多毫秒至秒大小以进行频道分配,此提供改进QOS及实体资源管理。此外,其允许UE接收多重服务而不需具同时频道接收的容量,因重叠的实体分配可被避免,此多重服务可由时间分开。
B节点18在该CCC 13发信号至该UEs 121-12N,频道构形为UE 121-12N数据可被传送。藉由最大化无线电资源的使用,每一个TTI的较佳排程减少在服务间的资源冲突,此频道的分配经由该下行CCC使用发讯装置48送信号至使用者。若无该机构46,典型上,频道无法在TTI上被重新分配且结果为维持QOS及实体资源的高利用及有效使用的能力被限制。
图5A及5B为该HS-DSCH 16的较佳HS-DSCH发讯的说明。在图5A,藉由检测伴随所有服务使用者的PtM服务ID 51,PtM使用者群的每一个UE 121-12N被告知服务传送。该服务ID 51是编码在下行共通控制频道13。在预先决定时间期间后,使用者接收该经授权服务的HS-DSCH。
在图5B,藉由检测伴随UEs,UE群ID 1 531至UE群ID N 53N的ID,每一个UE 121-12N被告知服务传送,其是编码在该下行共通控制频道13。在预先决定时间期间后,使用者接收由该CCC 13显示的该HS-DSCH 16以得到具有经授权服务的服务ID的封包。
图6为建立及传送在HS-DSCHs上点对多点服务的较佳信号的说明。该UTRAN 70发信号至每一个使用者以接收该传输74的输送属性的服务。每一个使用者构形其本身以接收该传输及监看该CCC的PtM服务ID群72。传送用做点对多点服务的数据藉由UMTS无线电存取网络(UTRAN)自核心网络接收70。在该CCC上的服务/群/UE ID显示在特定HS-DSCH实体频道的订定时间期间后,该HS-DSCH传输会很快发生,在接收该CCC后,每一个使用者构形其本身以接收该HS-DSCH传输。
每一个使用者可以层3发信号步骤送出频道品质数据给该RAN 70,76。该频道数据的传送亦可藉由实体层发信号,以TTI为基准报告78。使用在每一个PtM使用者群的所有使用者的该频道品质数据,该RAN 70决定至每一个PtM使用者群的HS-DSCH传输的合适MCS。为说明用途,该RAN 70一般会设定该MCS在由具最差接收品质的使用者可于所欲QOS接收的一种位准。为最适化无线电资源的使用,虽然在更新间可使用更长时间范围,较佳为这些参数在每传送时间间隔(TTI)被更新。
该UTRAN 70同时进行该HS-DSCH分配82,且每一个UE 12构形该HS-DSCH接收84。服务数据在该HS-DSCH上传送86。在该HS-DSCH上传送的服务数据由该UE 12接收。鉴定后,该服务数据被向前送至共通通讯频道,较佳结构允许在分享或专属频道如PtM或PtP传输上转移共通通讯频道数据的弹性。此对映在无线接口的传输侧及接收侧上皆执行。
图7为在无线电网络控制器19及UE 12比值下的较佳频道对映的说明。PtM数据到达在共通通讯频道(CTCH)的RNC,该CTCH对映在该HS-DSCH上以在该实体频道(HS-PDSCH)上传送至使用者。一个UE 12于此处被说明且一般多重UEs接收该HS-DSCH传输。UE 12接收该HS-PDSCH及对映该HS-DSCH至该CTCH以由该UE 12处理。

Claims (2)

1.一种能支持使用高速频道的点对多点服务的B节点,其特征在于,包括:
一种高速下行分享频道产生器,其耦合至一调变及编码组选择装置与一自动回复请求接收器,以在经选择的调变及编码组产生高速下行分享频道且在该高速下行分享频道产生器上传送服务识别符,显示在该高速下行分享频道产生器上的点对多点服务的传输,该点对多点服务同时在该高速下行分享频道产生器上传送至多个使用者,及重新传送该点对多点服务的数据以响应自动回复请求接收器;
一频道品质测量处理器以接收来自许多接收该点对多点服务的使用者的频道品质测量;
该调变及编码组选择装置耦合至该频道品质测量处理器,以使用该频道品质测量选择经选择的调变及编码组;
一共通控制频道产生器,其耦合至该调变及编码组选择装置,以产生一用于许多使用者的共通控制频道并在该共通控制频道传输服务识别符;
该自动回复请求接收器用以接收回复请求并提供所述请求至该高速下行分享频道产生器;及
一天线,其耦合至该高速下行分享频道产生器与该共通控制频道产生器以射出该高速下行分享频道及共通控制频道、提供回复请求至该自动回复请求接收器以及提供频道品质数据至该频道品质测量处理器。
2.如权利要求1所述的能支持使用高速频道的点对多点服务的B节点,其特征在于,该B节点是借由一排程机构以排程在该高速下行分享频道产生器上点对点及点对多点传输的传输,且该B节点还包括一发信号装置,该发信号装置耦合至所述排程机构以发信号该点对点及点对多点传送至使用者。
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