CN101888291B - 实施增强专用频道传输数据使用期间定时器的方法及装置 - Google Patents

实施增强专用频道传输数据使用期间定时器的方法及装置 Download PDF

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CN101888291B
CN101888291B CN2010102486891A CN201010248689A CN101888291B CN 101888291 B CN101888291 B CN 101888291B CN 2010102486891 A CN2010102486891 A CN 2010102486891A CN 201010248689 A CN201010248689 A CN 201010248689A CN 101888291 B CN101888291 B CN 101888291B
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张国栋
史蒂芬·E·泰利
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InterDigital Technology Corp
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    • 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]
    • 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
    • H04L1/1867—Arrangements specially adapted for the transmitter end
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • 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
    • H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
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    • H04L1/1829—Arrangements specially adapted for the receiver end
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    • 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
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    • H04L1/1867—Arrangements specially adapted for the transmitter end
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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
    • H04L1/1607—Details of the supervisory signal

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Abstract

一种支持增强专用频道(E-DCH)数据传输的无线通信系统，其包含一无线传输/接收单元(WTRU)、至少一节点B以及一无线网络控制器(RNC)。该WTRU包含一缓冲器、一数据使用期限定时器、一数据重新传输计数器、一混合自动重复请求(H-ARQ)程序以及一控制器。该定时器为储存于该缓冲器内的至少一数据区块建立一使用期限。如果实体资源尚未配置给一使用期限定时器接近到期的数据区块，则该WTRU会发送一紧急频道配置请求，如果已经配置实体资源，则该控制器将相对于其它数据区块，优先化该数据区块传输。如果该使用期限定时器已经到期，或是如果该WTRU接收指示该数据区块已经成功地由该节点B所接收的回馈信息，则丢弃该数据区块。

Description

实施增强专用频道传输数据使用期间定时器的方法及装置
本申请是2005年4月29日提交的题为“实施增强专用频道传输数据使用期间定时器的方法及装置”的第200580014450.5号中国专利申请的分案申请。
技术领域
本发明是关于一种无线通信系统，其包含至少一无线传输/接收单元(WTRU)、至少一节点B以及一无线网络控制器(RNC)。本发明尤其是关于一种用以实行数据使用期间定时器的方法及装置，其是支持增强专用频道(E-DCH)传输。
背景技术
用以改善上链(UL)覆盖、生产能力以及传输等待时间的方法，现今在第三代伙伴计划(3GPP)第6版(R6)中已经有所研究。为了达成这些目标，节点B将接管排程和分派上链资源给WTRUs的责任，节点B能做出更有效率的决定，且管理以短程为基础的无线资源会比RNC较好，RNC仍然保持着对具有增强上链(EU)的胞元的一般性整体控制，以便该RNC能执行类似呼叫许可控制以及拥挤控制等功能。
混合自动重复请求(H-ARQ)技术提供一种程序，用以产生具有低等待时间的传输和重新传输。H-ARQ技术的一个主要方向系在于，在失效传输时所接收的数据系平稳地与连续重新传输组合，以便增加成功接收的机率。
当传输时使用H-ARQ机制以及节点B排程时，成功传输数据所需要的时间会有所不同，明显地延迟传输会对仅需要非常低等待时间的传输应用程序带来不利地影响，举例来说，延迟的数据可当作为失效的传输，且该应用程序会以非必要重新传输作结束，因此，便需要一种限制传输等待时间的机制。
发明内容
本发明是于一支持E-DCH数据传输的无线通信系统中执行，该无线通信系统包含一无线传输/接收单元(WTRU)、至少一节点B以及一无线网络控制器(RNC)。该WTRU包含一数据缓冲器、一数据使用期限定时器、一数据重新传输计数器、一混合自动重复请求(H-ARQ)程序以及一控制器。该数据使用期限定时器会建立一个至少一数据区块储存于该缓冲器的一使用期限，该WTRU系配置以(i)周期性判定该使用期限定时器是否已经到期；(ii)判定该数据区块是否先前以传输过；(iii)判定该使用期限定时器是否即将到期；以及(iv)判定实体资源是否已经配置。如果实体资源尚未配置给使用期限定时器即将到期的数据区块，该WTRU会发送一紧急频道配置请求给该节点B，如果实体资源已经配置，则该数据区块相对于其它数据区块在传输上会优先化。如果该使用期限定时器到期，或是如果该WTRU接收到回馈信息指示该数据区块未被该节点B成功地接收，则该数据区块将被摒弃。
附图说明
通过下文中-较佳实施例的描述、所给予的范例，参照对应的图式，本发明可获得更详细地了解，其中：
图1系为根据本发明的无线通信系统运作的一方块图；以及
图2系为根据本发明在图1系统的WTRU中，实施数据使用期限定时器的程序流程图。
具体实施方式
此后，专用术语「WTRU」包含但并未限制于一使用者设备(UE)、一移动台、一固定或移动用户单元、一呼叫器或可在一无线环境下操作的任何形式的装置。当本文此后提到专用术语「节点B」，其包含但并未限制于一基地台、一站台控制器、一存取点或是在无线环境下任何结识的接口装置。
本发明的特征可整合至一集成电路(IC)，或是配置在包含许多相互连接组件的电路上。
图1是根据本发明之的无线通信系统100的方块图，该系统100包含至少一WTRU102，至少一节点B 104以及至少一RNC 106。该WTRU 102包含一控制器122、一数据使用期限定时器124、一缓冲器126以及多个H-ARQ程序128，并选择性地具有一重新传输计数器130。该控制器122控制整体数据传输步骤，其包含初始该数据使用期限定时器124以及一H-ARQ程序128的配置。
该RNC 106通过配置该节点B 104及该WTRU 102的WU参数，以控制该系统100的整体EU运作，该参数有例如运输频道(TrCH)或逻辑频道数据的使用期限、初始传输功率等级、最大允许EU传输功率或是每一节点B 104的可利用频道资源，E-DCH系建立以支持介于该WTRU 102及该节点B 104之间的EU传输。
关于该E-DCH传输方面，该WTRU 102经由一UL EU信号发送频道110发送一频道配置请求至该节点B 104，该频道配置请求(或是其它UL EU信号发送)，可经由该E-DCH108而非该UL EU信号发送频道110传输，而在响应方面，该节点B 104会经由一下链(DL)EU信号发送频道112发送频道配置请求信息至该WTRU 102，在EU无线资源配置给该WTRU 102之后，该WTRU 102会经由一E-DCH 108传输数据。在响应该E-DCH数据传输方面，该节点B 104会经由该DL EU信号发送频道112发送一H-ARQ运作的确认(ACK)或是非确认(NACK)信息。
图2系为一根据本发明的程序200的流程图，其系在用以支持E-DCH传输的WTRU102中执行一数据使用期限定时器124。该WTRU 102可使用多个数据使用期限定时器124，同时处理多重E-DCH传输。
当经由该E-DCH 108所传输的一个新的数据区块被接收之后，该控制器122启动该数据区块的一数据使用期限定时器124，并结合于一H-ARQ程序128与该数据区块，且新的数据区块于该缓冲器126中等待(步骤202)。该RNC为每一E-DCH TrCH或是每一E-DCH逻辑频道设定该数据使用期限的组态，根据UL传输是在MAC或是RLC接收，对每一传输初始该定时器。
E-DCH数据使用期限定时器124的值可由该WTRU 102的该控制器122决定，其会考虑几个因子，例如最大允许传输等待时间、RLC组态、该TrCH区块错误率(BLER)等等，举例来说，该最大允许等待时间决定该数据在传输之前可在缓冲器停留多久时间。除此之外，该BLER决定H-ARQ重新传输的数量，其会影响传输等待时间。分派给该数据使用期限定时器124的值亦可考虑WTRU数据处理，其系在WTRU 102的EU媒体存取控制实体(MAC-e)进行外部处理。
应用程序通讯协议(例如TCP/IP)需要最小的传输等待时间，以及传输等待中最小的变化，以便达成最大的生产力。当传输延迟发生时，数据会被预期为失败或是摒弃，而非延迟以及重新传输，此导致该应用程序的不有效的行为。
在步骤204中，对于每一TTI，该控制器122会判定在WTRU 102的缓冲器126中，该数据区块的数据使用期限定时器124是否到期(步骤206)。如果该数据使用期限定时器124已经到期，该控制器122会摒弃该数据区块，并且释出关连的H-ARQ程序128(步骤208)，该WTRU 102可向RNC 106或是节点B 104报告此事件(步骤210)，该WTRU 102可更进一步向节点B 104报告，通过发送一具有特定指示的频道配置请求，以说明该实体资源配置并不充足。
回到步骤206，如果该数据区块的数据使用期限定时器124尚未到期，控制器122判定在WTRU 102的缓冲器126中的数据区块，先前是否已经由WTRU 102传输过(步骤212)，如果该数据区块先前已经传输过，就会更进一步判定与该数据区块相关的数据回馈信息是否已经由该节点B所接收(步骤214)，如果指示该数据区块传输成功的确认信息(ACK)，则该数据区块会从该缓冲器126中移除，而相关连的H-ARQ程序128会空出来以便支持其它数据区块，且该数据使用期限定时器会重新设定(步骤216)，如果没有收到回馈信息，该WTRU 102会等待该回馈信息，直到下一个TTI为止(步骤218)。
在步骤212，如果判定该数据区块先前未由WTRU 102所传输，或是该数据区块已经传输，但却收到只是该数据区块传输失败的非确认信息(NACK)，则会重新传输该数据区块。控制器122判定该数据区块的该数据使用期限定时器是否已经接近到期，如果该数据使用期限定时器124尚未接近到期，则一个标准的H-ARQ运作会初始化以传输该数据区块(步骤222)。
在步骤224中，当该数据使用期限定时器124接近到期时，该控制器122会判定实体资源是否已经被配置(步骤224)，如果实体资源已经被配置，控制器122可选择性地将该数据区块的传输优先化(步骤226)，如果实体资源尚未被配置，该控制器122可选择性地发送一紧急频道配置请求至该节点B，以便支持该数据区块的传输(步骤228)。
回到步骤214，如果未收到NACK信息，则该数据区块会被重新传输，该控制器122可判定该重新传输计数器130是否已经达到最大重新传输限制(步骤230)，每一次该数据区块重新传输，该重新传输计数器130便会增额，而且该最大重新传输限制系由该RNC所设定。如果该重新传输计数器130尚未达到最大重新传输限制，程序200会进行步骤220，如果该重新传输计数器130已经达到最大传输限制，只要该数据区块的该数据使用期限定时器124尚未到期，控制器122便会重新初始该H-ARQ程序128(步骤232)，该重新传输计数器130会被初始化且一新的数据指示器会增额，以便指示该H-ARQ程序128的重新初始化。
尽管本发明的特征和组件皆于实施例中以特定组合方式所描述，但实施例中每一特征或组件能独自使用，而不需与其它特征或组件组合，亦能与/不与本发明的其它特征和组件做不同的组合。

Claims (10)

1.一种在一无线传输/接收单元WTRU中实施以用于一上链中一数据区块的传输的方法，该方法包含:
经由增强专用频道E-DCH接收用于传输的一数据区块；
将该数据区块储存于一缓冲器中；
分派用于该数据区块的一混合自动重复请求H-ARQ程序；
通过该H-ARQ程序传输该数据区块；
接收该数据区块的回馈信息，在所述数据区块的定时器尚未到期且该回馈信息指示该数据区块未被成功传送的条件下，该数据区块通过该H-ARQ程序重新被传输；以及
在所述数据区块的定时器尚未到期且该数据区块的重新传输次数已达到一配置的最大限制的条件下，初始化该H-ARQ程序的重新传输计数器；以及
其中所述初始化该H-ARQ程序的重新传输计数器还在所述数据区块的定时器到期的条件下被执行；以及
其中所述初始化该H-ARQ程序的重新传输计数器还在该回馈信息指示该数据区块被成功传送的条件下被执行。
2.根据权利要求1所述的方法，其中该数据区块为一E-DCH数据区块。
3.根据权利要求1所述的方法，其中在所述数据区块的所述定时器到期或所述回馈信息指示该数据区块被成功传送的条件下，提供新数据区块给该H-ARQ程序。
4.根据权利要求1所述的方法，还包含：
在数据使用期限到期的条件下，丢弃所述数据区块。
5.根据权利要求1所述的方法，还包含：
在所述回馈信息指示该数据区块为成功传送的条件下，当数据使用期限未到期时丢弃所述数据区块。
6.一种无线传输/接收单元WTRU，其用于在一上链中一数据区块的传输，该WTRU包含：
一数据缓冲器，其配置以储存用于传输的一数据区块，该数据区块经由增强专用频道E-DCH接收；
一混合自动重复请求H-ARQ程序，用于该数据区块的传输及重新传输，在所述数据区块的定时器尚未到期且回馈信息指示该数据区块未被成功传送的条件下，该数据区块被重新传输；以及
一控制器，其配置以分派用于该数据区块的传输及重新传输的一H-ARQ程序，并在所述数据区块的定时器尚未到期且该数据区块的重新传输次数已达到一配置的最大限制的条件下，初始化该H-ARQ程序的重新传输计数器；其中该H-ARQ程序的重新传输计数器的所述初始化还在所述数据区块的定时器到期的条件下被执行；以及其中该H-ARQ程序的重新传输计数器的所述初始化还在该回馈信息指示该数据区块被成功传送的条件下被执行。
7.根据权利要求6所述的WTRU，其中该数据区块为一E-DCH数据区块。
8.根据权利要求6所述的WTRU，其中在所述数据区块的所述定时器到期或所述回馈信息指示该数据区块被成功传送的条件下，提供新数据区块给该H-ARQ程序。
9.根据权利要求6所述的WTRU，其中在数据使用期限到期的条件下，所述控制器配置以丢弃该数据区块。
10.根据权利要求6所述的WTRU，其中在所述回馈信息指示该数据区块为成功传送的条件下，所述控制器配置以在该数据使用期限未到期时丢弃该数据区块。
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