CN1951043B - 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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CN1951043B
CN1951043B CN2005800144505A CN200580014450A CN1951043B CN 1951043 B CN1951043 B CN 1951043B CN 2005800144505 A CN2005800144505 A CN 2005800144505A CN 200580014450 A CN200580014450 A CN 200580014450A CN 1951043 B CN1951043 B CN 1951043B
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张国栋
史蒂芬·E·泰利
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InterDigital Technology Corp
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    • H04L1/16—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
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    • 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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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
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
通过下文中一较佳实施例的描述、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中的资料区块，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 (14)

1.一种在一无线传输/接收单元WTRU中利用至少一数据使用期限定时器用以支持增强专用频道E-DCH数据传输的方法，其系于包含该WTRU及至少一节点B的一无线通信系统中，该方法包含：
接收将欲从一较高层传输的一E-DCH数据区块；
将欲传输的该E-DCH数据区块储存于该WTRU的一缓冲器中；
启动该E-DCH数据区块的一数据使用期限定时器；
将该E-DCH数据区块分派至一混合自动重复请求H-ARQ程序；
如果该数据使用期限定时器接近到期，判断是否已经配置实体资源以用于该E-DCH数据区块的传输；
如果尚未配置该实体资源，则发送一紧急频道配置请求至节点B，且如果已经配置该实体资源，则给予该E-DCH数据区块的传输优先权；以及
当该数据使用期限定时器到期时，丢弃该E-DCH数据区块及释放该H-ARQ程序。
2.根据权利要求1所述的方法，其特征在于，更包含：
如果该数据区块先前已经传输过且该数据使用期限定时器尚未接近到期，则为了该数据区块的传输而初始一标准H-ARQ运作。
3.根据权利要求1所述的方法，其特征在于，将该数据使用期限定时器配置用于多个运输频道TrCHs中的每一个运输频道。
4.根据权利要求1所述的方法，其特征在于，将该数据使用期限定时器配置用于多个逻辑频道中的每一个逻辑频道。
5.根据权利要求1所述的方法，其特征在于，基于至少下列其中的一设定该数据使用期限定时器：一最大允许传输等待时间、一建立无线连结控制RLC组态以及一运输频道区块错误率BLER。
6.根据权利要求1所述的方法，其特征在于，该方法更包含：
当该WTRU接收回馈信息以指示该E-DCH数据区块成功地被该节点B接收时，在该数据使用期限定时器到期前丢弃该E-DCH数据区块。
7.一种无线传输/接收单元WTRU，其使用至少一数据使用期限定时器以支持增强专用频道E-DCH数据传输，其系于包含该WTRU以及至少一节点B的一无线通信系统中，该WTRU包含：
一缓冲器，用以储存欲传输的一E-DCH数据区块；
一数据使用期限定时器，用以监视该E-DCH数据区块的一使用期限；
一混合自动重复请求H-ARQ程序，用以传输该E-DCH数据区块；以及
一控制器，其与该缓冲器以及该数据使用期限定时器通讯，其中当该数据使用期限定时器接近到期时，该控制器配置以判断是否已经配置实体资源以用于该E-DCH数据区块的传输，如果尚未配置该实体资源，则发送一紧急频道配置请求至节点B，且如果已经配置该实体资源，则给予该E-DCH数据区块的传输优先权，及当该数据使用期限定时器到期时，该控制器配置以丢弃该E-DCH数据区块。
8.根据权利要求7所述的WTRU，其特征在于，该WTRU发送一信息至该节点B，指示该E-DCH数据区块已经被丢弃且该H-ARQ程序是可利用。
9.根据权利要求7所述的WTRU，其特征在于，该WTRU发送一信息至一无线网络控制器RNC，指示该数据使用期限定时器已经到期。
10.根据权利要求7所述的WTRU，其特征在于，如果该E-DCH数据区块先前已被传输且该数据使用期限定时器尚未接近到期，则该控制器会为了该E-DCH数据区块的传输而初始一标准H-ARQ运作。
11.根据权利要求7所述的WTRU，其特征在于，将该数据使用期限定时器配置用于多个运输频道TrCHs中的每一个运输频道。
12.根据权利要求7所述的WTRU，其特征在于，将该数据使用期限定时器配置用于多个逻辑频道中的每一个逻辑频道。
13.根据权利要求7所述的WTRU，其特征在于，该控制器基于至少下列其中的一设定该数据使用期限定时器：一最大允许传输等待时间、一建立无线连结控制RLC组态以及一运输频道数据区块错误率BLER。
14.根据权利要求7所述的WTRU，其特征在于，当该WTRU接收回馈信息以指示该E-DCH数据区块已经成功地被该节点B接收时，在该数据使用期限定时器到期前，该控制器配置用以丢弃该E-DCH数据区块。
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