CN100355214C - 用基本信道发射功率测量预测有利补充信道发送时隙的方法和设备 - Google Patents

用基本信道发射功率测量预测有利补充信道发送时隙的方法和设备 Download PDF

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CN100355214C
CN100355214C CNB008159629A CN00815962A CN100355214C CN 100355214 C CN100355214 C CN 100355214C CN B008159629 A CNB008159629 A CN B008159629A CN 00815962 A CN00815962 A CN 00815962A CN 100355214 C CN100355214 C CN 100355214C
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CN1391733A (zh
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J·赫兹曼
陈道
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Qualcomm Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/16—Deriving transmission power values from another channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/22—TPC being performed according to specific parameters taking into account previous information or commands
    • H04W52/223—TPC being performed according to specific parameters taking into account previous information or commands predicting future states of the transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/912—Packet communications
    • Y10S370/913—Wireless or radio

Abstract

一种结合话音数据通信选择非话音数据通信有利发送时隙的方法和设备。根据基站在基本信道上对远端台发射的话音数据发射功率电平，选择反映补充信道上发送非话音数据用的有利功率电平和传输速率的时隙。选择该有利发送时隙无需远端台将有关补充信道的频道或干扰信息的信息通知基站。

Description

用基本信道发射功率测量 预测有利补充信道发送时隙的方法和设备
发明背景
1.发明领域
本发明涉及无线通信。具体而言，本发明涉及结合基本信道使用的补充信道的功率控制要求预测方法和设备。
2.已有技术说明
传统上需要无线通信系统支持各种业务。一种这样的通信系统是遵照“TIA/EIA/IS-95双模宽带扩频蜂窝网系统移动台与基站兼容标准”(后文称为IS-95)的码分多址(CDMA)系统。4901307号和5103459号美国专利揭示多址通信系统中的CDMA技术的应用，前者题目为“SPREAD SPECTRUM MULTIPLEACCESS COMMUNICATION SYSTEM USING SATELLITE OR TERRESTRIAL REPEATERS”，后者题目为“SYSTEM AND METHOD FOR GENERATING WAVEFORMS IN A CDMA CELLULARTELEPHONE SYSTEM”，均转让给本发明受让人，申请号09/382438的共同待批美国专利申请也有这方面的揭示，其题目为“METHOD AND APPARATUS USING AMULTI-CARRIER FORWARD LINK IN A WIRELESS COMMUNICATION SYSTEM”，这些专利都按参考文献在此引入。
近来，上述CDMA之类的无线系统已提供一些混合业务，诸如提供无线话音和数据通信。为了协调这些业务的实现，国际电联要求呈报无线通信信道上提供高速率数据业务和高质量话音业务的建议标准。美国电信业协会(TIA)提出一前期建议，其题目为“The cdma 2000 ITU-R RTT Candidate Submission”，按参考文献在此引入，后文称之为cdma 2000。cdma 2000中揭示在基本信道和补充信道发送非话音数据的各种方法。
CDMA系统中，用户通过一个或多个基站与网络通信。例如，远端台(RS)的用户可通过经无线链路对基站(BS)发送数据与诸如因特网等陆地数据源通信。RS与BS之间的该链路通常称为“反向链路”。BS接收数据，并通过基站控制器(BSC)发到陆地数据网。数据从BS发到RS时，在“前向链路”发送。CDMA IS-95系统中，前向链路(FL)和反向链路(RL)分配隔开的频率。
进行通信时，远端台与至少一个基站通信。然而，在进行诸如软切换时，CDMA的RS也能同时与多个BS通信。软切换是与新基站建立新前向链路和反向链路后才断开先前基站旧链路的过程。软切换使呼叫丢失(即呼叫非故意地从系统断开)的概率最小。5267261号美国专利揭示一种软切换过程中在RS与多个BS之间提供通信的方法和装置，该专利题目为“MOBILE ASSISTED SOFTHANDOFF IN A CDMA CELLULAR TELEPHONE SYSTEM”，转让给本发明受让人，按参考文献在此引入。
如果无线数据应用需求不断增长，高效话音和数据无线通信系统的需要就日益显著。5504773号美国专利揭示一种在固定规模码信道帧发送数据的方法，该专利题目为“METHOD AND APPARATUS FOR THE FORMATTING OF DATA FORTRANSMISSION”，转让给本发明受让人，按参考文献在此引入。根据IS-95标准，非话音数据和话音数据划分成宽20msec且数据速率高达14.4Kbps的码信道帧。
话音业务与数据业务的显著区别是话音业务有严格的固定延迟要求。话音业务单向总延迟必须小于100msce。反之，选择性安排的数据业务延迟，即使长于100msec，也能用于优化通信系统效率。例如，数据业务传输能用需要较长延迟的纠错编码技术。
衡量数据传输质量和效率的一些参数有传送数据分组要求的传输延迟和系统平均吞吐速率。如上所述，传输延迟对数据或“非话音”通信的影响与对话音或“话音数据”通信的影响不同。而且，由于延迟是衡量数据通信系统质量的重要度量，也不能忽略，平均吞吐速率反映通信系统能传输数据的效率。
而且，无线通信系统中，信号传输能量保持最小值而满足信号质量性能要求时，容量最大。该性能要求相当于接收时所发送的话音数据和非话音数据质量不能显著劣化。接收信号的一个质量尺度是接收机的载波干扰比(C/I)。因此，希望提供一种保持接收机C/I恒定的发射功率控制系统。5056109号美国专利详细说明该系统，此专利题目为“Method and Apparatus forControlling Transmission Power in a CDMA Cellular Telephone System”，转让给本发明受让人，按参考文献在此引入。
已公知，蜂窝网系统中任何给定用户的C/I随RS在覆盖区的位置变化，为了保持给定的服务水平，TDMA和FDMA系统采取频率重用法，即每一基站不使用全部的频道和/或时隙。CDMA系统中，在系统的每一蜂窝区重复使用相同的频道分配，从而提高总效率。RS关联的C/I决定基站到用户RS的前向链路能支持的信息速率。申请号08/963386号的共同待批美国专利申请揭示一种无线通信系统中发送高速率数字数据的示范系统，该申请题目为“METHOD ANDAPPARAUS FOR HIGHER RATE PACKET DATA TRANSMISSION”，转让给本发明受让人，按参考文献在此引入。
由于RS关联的C/I决定前向链路能支持的信息速率，知道所用各频道的传输信息和历史性C/I信息是有益的。该信息常在RS上收集，并通知BS。但这样通知信息使用宝贵的系统资源。需要消除要这样通知信息的一种发明。最好用第1信道的BS发射功率电平预测在第2信道发送附加数据的有利时隙。
发明内容
广义而言，本发明解决无线通信业务需求日益增长提出的新技术要求。本发明涉及结合话音数据通信所发送非话音数据的有利发送“时隙”的选择方法和设备。根据基站对远端台发送的话音数据的发射功率电平，选择反映非话音数据期望功率电平和传输速率的时隙。
一实施例中，本发明实现提供一种在无线通信系统中所用补充信道上发送非话音数据的有利时隙的预测方法。反映基站所发送话音数据信号质量的度量，一般在远端台测量。从远端台对基站所在处传送消息，通知代表接收信号质量的一个或多个度量或值。如果需要，基站所在处可考虑这些消息或值，对话音数据发射功率进行调整。与此同时，在基地所在处监视前向链路的话音数据发射功率。用第1信道对远端台发送话音数据，这里将第1信道具体称为基本信道。
一实施例中，用第1信道上发射的各种话音数据发射功率电平计算动态发射功率值。然后，用该值选择期望的附加数据发送时隙。此附加数据用期望的附加数据发射功率电平和数据传输速率在共用或非共用的第2信道(诸如补充信道)上得到发送。
另一实施例中，本发明提供一种含数字信号处理装置可执行信息的制品。又一实施例中，本发明给出实践本发明方法的设备。该设备可包含远端台和至少一个基站，该基站具有各种单元，其中包括对远端台传送信息信号的收发机。显然，为了接收信号，远端台也包含与基站通信上相连的收发机，并且适用时可能是卫星。该设备还包含通信上与网络或其一组成部分相连的至少一个数字数据处理装置，诸如微处理器或专用集成电路。
本发明为其用户提供许多好处。一个好处是可根据基站处发射的话音数据功率建立补充信道的控制功率。另一好处是本发明减少当前通信网络遭遇的系统资源费用。这些网络依赖从远端台收到的有关远端台接收时补充信道信号质量的通知。又一好处是本发明可用话音数据的历史性基地处发射功率电平选择非话音数据载送信道中的有利发送时隙。本发明还提供一些其他好处和优点，审阅以下本发明详细说明后，会更清楚。
附图说明
结合附图考虑以下详细说明后，本领域的技术人员会进一步明白本发明的性质、目的和优点。附图内相参考号都指相同部件，其中：
图1根据本发明说明相对于时间的发射功率起伏变化；
图2根据本发明一实施例说明有利的补充信道发射功率；
图3根据本发明一实施例示出说明操作序列的流程图；
图4a是根据本发明使用的移动台总体配置框图；
图4b是根据本发明使用的总体信道结构框图；
图5a是根据本发明使用的数字信号处理装置的硬件部件和互联框图；
图5b是根据本发明使用的图5所示调制器526中硬件部件和互联框图；
图6a是根据本发明使用的基站数字信号处理装置中硬件部件和互联框图；
图6b是根据本发明使用的图6a所示解调器604中硬件部件和互联框图；
图7是根据本发明的数字数据存储媒体示范实施例。
示范实施例详细说明
图1～图7说明本发明各方法和设备方面的例子。为了便于解释，在可用各种硬件部件和互联实施的信号处理装置的背景下说明设备的例子，但不受此背景限制。阅读以下说明后，本领域的任一技术人员会明白这些信号处理装置的进一步布局。
运作
IS-95通过使基地处(BS)可用多达8条前向链路和多达8条反向链路与远端台(RS)通信，支持中等数据速率(MDR)的数据传输。通过采用有些类似的系统，已取得进步，以顾及高数据速率(HDR)的传输。如果以保持通信质量所需最低功率电平进行发送，BS与RS之间就能更有效地传输数据。
话音数据的发送一般取决于与基站通信的大量非相关用户和均衡RF容量与RF稳定性的良性马尔可夫话音统计。这些大量非相关用户使前向链路RF发射功率形成可预测静态对数正态分布。没有这种前向链路RF功率可预测性，前向链路控制和移动台辅助型切换就不稳定。
然而，诸如从因特网下载数据等非话音数据传输就不是这样运转。数据业务常以猝发方式到来，导致最大速率传输周期较长，后续最小速率传输周期也较长。由于MDR和HDR网络的进步，该效应更显著。与相关话音链路不同，这里的链路一起在最大速率与最小速率之间切换，并且一起进行功率控制。这造成前向链路功率总体上形成判决性非静态、非对数正态分布。
典型的通信网络中，RS用户依据该用户相对于与其通信的基站的位置，具有不同的射频(RF)要求。用户的RF环境越坏，基站传送固定量数据需要的功率越大。因此，遇到差RF环境的用户使用较多的网络容量。例如，处于不同实际位置的用户会遇到不同的衰落条件，诸如一用户进入建筑物的盲区，而另一用户则进入树木的RF盲区，则遇到的衰落条件不同。这些条件会降低接收信号强度，导致比不出现衰落时接收信号质量差。要克服衰落，可增大发射功率。
如图1所示，从BS发射到RS的话音数据的发射功率电平可随时间变化。例如，在时间102，从BS对用户#1发射话音数据用的功率电平最大。在时间104，对用户#2发射话音数据需要的功率电平最小。在时间106，用户#1和#2用的平均话音数据发射功率最小。本发明一实施例中，图2所示的时隙108是在用户#2的数据信道发射附加数据有利的时间或时隙。利用在基站测量的话音数据发射功率作此判断。根据在第1信道发射话音数据的预测BS功率电平选择要在第2信道发送给用户的非话音数据，会使总数据吞吐量最大，并且不需要从RS通知BS有关第2信道状况的质量度量。
此基本方法确保话音数据传输保证有：(1)最小带宽，(2)最大延迟窗，(3)给定数据速率。然而，由于非话音数据用户一般通信质量要求不严格，可改变传输数据速率。不过，本发明能用于单独非话音数据传输。此实施例中，非话音数据用一条或多条前向链路信道传送，但总发射功率总体上固定。用确保发射功率电平低于总允许发射功率电平的数据速率进行通信发送。通过首先采用全速率基本信道，然后增加补充信道进行发送，从而达到这点。根据在BS对基本信道上的发送测量的发射功率决定在补充信道上用的发射功率。无论如何，发送非话音数据用的信道的发射功率电平聚集成低于总容许发射功率的值。
图3是一流程图，反映用于CDMA网络的本发明一实施例的方法步骤300。该方法在步骤302开始，并且在任务304从BS发射数据信号到RS。如上文讨论的那样，此发射数据可包含在第1信道发射的话音和/或非话音数据，第1信道在这里也称为基本信道。第1信道是从BS载送高层数据与功率控制信息的组合到RS的部分前向链路信道。第2信道也是部分前向链路信道，结合第1信道或前向专用控制信道进行工作，提供增加的数据传送业务。第2信道常称为补充信道，但也可以是专用基本信道。
出现话音数据发送时，接收该发送的RS测量反映所接收通信质量的预选度量。这些度量可包含位差错率和其他常用度量。如果接收信号质量下降，仍然欠佳，则在任务308中，RS将代表值通知BS。此通知可指示需要增加、减少或不改变在第1信道发送的数据的发射功率。如果需要，可在任务310调整发射功率电平。
BS在基本信道发射数据时，在任务312中，在BS监视发射功率电平。任务3 1 4中，判定反映聚集发射电平及其分布的动态值。本实施例中，该动态值可反映瞬时平均发射功率电平。其他实施例中，可用本领域公知的大量方法判定动态值，只要该动态值对第1信道发送表示选择时间点的最低发送功率值。任务316中，用这些动态值可预测第2信道上发射数据的最有利时隙。可选择需要数据的RS用户用的非话音数据，并且发送该数据。完成非话音数据通信，则在任务320结束本方法。然而，如果通信未完成或者需要进行另一用户要用的发送，本方法就在任务318重复进行。
硬件部件和互联
除上述各方法实施例外，本发明的不同方面还涉及执行这些方法用的设备实施例。
图4a示出一简单框图，表示为按照本发明应用而配置的移动台(MS)401。MS401用cdma 2000的多载波FL接收来自基站(未示出)的信号。按后文所述处理该信号。MS 401用cdma 2000的RL对基站发送信息。图4b示出代表按照本发明准备MS401所发送信息的信道结构的较详细框图。该图中，以组织成位块的位发射要发送的信息(后文称为信号)。CRC和尾位发生器(发生器)403接收该信号。发生器403用循环冗余码产生奇偶校验位，在接收机收到信号时帮助判断信号质量。信号中包含这些位。数据块的末尾还可增添尾位(固定的位序列)，使编码器405复原到已知状态。
编码器405接收信号，并在信号中建立冗余，以便进行纠错。可用各种“码”判断如何在信号中建立冗余。这些编码位称为码元。重复发生器407将收到的码元重复预定次数，因而允许由于发送差错而丢失部分码元，并且不影响所发送信息的总体质量。块交织器409取入码元加以交织。长码发生器411接收交织后的码元并且用按照预定码片速率产生的伪随机噪声序列加扰。每一码元与加扰序列的一个伪随机码片进行逻辑“异”。
按照以上关于方法的解释，用一个以上的载波(信道)发送信息。因而，分路器(未示出)可取一个输入信号“a”，并且用可恢复输入信号的方法将其分成多个输出信号。一实施例中，信号“a”分成3个隔开的信号，分别代表选定的数据类型，每一数据类型的信号用一FL信道发送。另一实施例中，分路器可将信号“a”分成各有一种数据类型的2个分量。无论如何安排，本发明考虑从主信号产生的不同信号能用一个或多个信道发送。
此外，本方法能用于以完全相同或部分相同的FL信道发送信号的多个用户。例如，来自4个不同用户的信号要用相同的3个FL信道发送，则通过将各信号分路成3个分别用不同FL信道发送的分量，将这些信号的每一个加以“信道化”。对每一信道，将各个信号复接在一起，形成每一FL信道一个信号。然后，用这里说明的方法发送信号。于是，沃尔什编码器(未示出)将分路的信号加以编码，并由乘法器扩展成I和Q两个分量。这些分量由加法器求和后，传送到远端台(未示出)。
图5a说明在无线通信装置500中实施的本发明发送系统示范实施例的功能框图。本领域的技术人员会理解，该图所示的某些功能框图在本发明其他实施例中可不提供。图5b的框图对应于符合用于CDMA的TIA/EIA标准IS-95(也称为IS-2000或cdma 2000)工作的实施例。本发明的其他实施例对其他标准有效，这些标准中包括ETSI和ARIB标准机构建议的宽带CDMA(WCDMA)标准。本领域的技术人员会理解，由于WCDMA的反向链路调制与IS-95C标准的反向链路调制广泛相同，本发明可扩展到WCDMA标准。
图5a的示范实施例中，无线通信装置发送多个不同的信息信道，相互间用申请号08/886604美国专利申请所述的短正交扩展系列加以区域，该专利题目为“HIGH DATA RATE CDMA WIRELESS COMMUICATION SYSTEM”，转让给本发明受让人，按参考文献在此引入。无线通信装置发送5个分开的码信道：(1)第1补充数据信道532，(2)导频和功率控制码元时分复用信道534，(3)专用控制信道536，(4)第2补充信道538，(5)基本信道540。第1补充数据信道532和第2补充数据信道538载送超过基本信道540的容量的数字数据，诸如传真、多媒体应用、图像、电子邮件消息或其他形式的数字数据。导频和功率控制码元复用信道534载送顾及基站对数据信道相干解调的导频码元和与无线通信装置500通信的基站发射能量控制用的功率控制位。控制信道536载送对基站的控制信息，诸如无线通信装置500的工作方式、无线通信装置500的性能和其他必要的信令信息。基本信道540是从无线通信装置载送基本信息到基站用的信道。发送话音时，基本信道540载送话音数据。
补充数据信道532和538受到编码和处理，以便借助未示出的装置进行发送，并提供给调制器526。功率控制位供给重复发生器522，使功率控制(PC)位重复后，将其供给复接器(MUX)524。MUX524中，冗余功率控制位与导频码元时分复用后，在线路534上提供给调制器526。
消息发生器512产生所需控制信息的消息，并且将控制消息供给CRC和尾位发生器514。该发生器514对控制消息添加作为在基站校验译码准确性用的奇偶位的循环冗余校验位组，还添加预定的尾位组，用于控制消息以在基站接收机子系统清除其译码器的存储器。然后，将消息供给编码器516，在控制消息上提供前向纠错编码。编码后的码元供给重复发生器518，对编码码元进行重复，以在发送中提供附加的时间分集。然后，将这些码元提供给交织器520，按照预定交织格式对码元重新排序。经交织的码元在线路536上提供给调制器526。
可变速率数据源502产生可变速率数据。在示范实施例中，可变速率数据源502是5414796号美国专利所述那样的可变速率话音编码器，该专利题目为“VARIABLE RATE VOCODER”，转让给本发明受让人，按参考文献在此引入。由于可变速率声码器的使用增加无线通信装置的电池寿命，并且增加系统容量，对所觉察话音的质量影响最小，该声码器在无线通信中受欢迎。美国电信业协会已在诸如临时标准IS-96和临时标准IS-733中编入最流行的可变速率话音编码器。这些可变速率话音编码器以4种速率对话音信号进行编码，根据话音活动程度，这4种速率分别称为全速率、半速率、1/4速率和1/8速率。该速率表明话音帧编码用的位数，并且逐帧变化。全速率采用预定的最大位数对帧编码，半速率采用用预定最大位数之半对帧编码，1/4速率采用1/4的预定最大位数对帧编码，1/8速率采用1/8的预定最大位数对帧编码。
可变速率数据源502将编码后的话音帧提供给CRC和尾位发生器504。该发生器504对控制消息添加作为在基站校验译码准确性用的奇偶位的循环冗余校验位组，还添加预定的尾位组，用于控制消息以在基站清除译码器的存储器。然后，将该帧供给编码器506，在话音帧上提供前向纠错编码。编码后的码元供给重复发生器508，使编码码元重复。然后，该码元供给交织器510，按照预定交织格式将其重新排序。经交织的码元在线路540上提供给调制器526。
示范实施例中，调制器526按照码分多址调制方式调制数据信道，并将已调信息供给发射机(TMTR)530，对信号进行放大和滤波后，通过双工器528提供该信号，用于通过天线发射。IS-95和cdma 2000系统中，将20ms的帧划分成16组数量相同的码元，将其称为功率控制组。对每一功率控制组，接收帧的基站，根据该基站接收反向链路信号充分程度的判断发布功率控制命令。以该实况为基础，建立功率控制基准。
图5b说明图5a中调制器526的实施例的框图。在线路532上将第1补充数据信道的数据供给扩展单元542，按照预定扩展序列覆盖该补充信道数据。示范实施例中，扩展单元542用短沃尔什序列(++--)扩展补充信道的数据。扩展的数据提供给相对增益单元544，调整相对于导频和功率控制码元的能量的扩展补充信道数据增益。增益调整后的补充信道数据供给加法单元546的第1加法输入端。在线路534上将导频与功率控制复用码元供给加法单元546的第2加法输入端。
在线路536上将控制信道数据提供给扩展单元548，按照预定扩展序列覆盖补充信道数据。示范实施例中，扩展单元548用短沃尔什序列(++++++++--------)扩展补充信道数据。扩展后的数据供给相对增益单元550，调整相对于导频和功率控制码元能量的扩展控制信道数据的增益。增益调整后的控制数据供给加法单元546的第3加法输入端。加法单元546求增益调整后的控制数据码元、增益调解后的补充信道码元和时分复用导频与功率控制码元的总和，并将该总和供给乘法器562的第1输入端和乘法器568的第1输入端。
在线路538上将第2补充信道供给扩展单元552，按照预定扩展序列覆盖补充信道数据。示范实施例中，扩展单元552用短沃尔什序列(++--)扩展补充信道数据。扩展后的数据供给相对增益单元554，调整扩展补充信道数据的增益。增益调整后的补充信道数据供给加法器556的第1加法输入端。
在线路540上将基本信道数据供给扩展单元558，按照预定扩展序列覆盖基本信道。示范实施例中，扩展单元558用短沃尔什序列(++++----++++----)扩展基本信道数据。扩展后的数据供给相对增益单元560，调整基本扩展数据的增益。增益调整后的基本信道数据供给加法单元556的第2加法输入端。加法单元556将增益调整后的第2补充信道数据码元和基本信道数据码元相加，并将其总和供给乘法器564的第1输入端和乘法器566的第1输入端。
示范实施例中，用采用2个不同短PN序列(PNI和PNQ)扩展的伪噪声，对数据进行扩展。在示范实施例中，短PN序列PNI和PNQ乘以长PN码，以提供附加保密。本领域已公知伪噪声序列的产生，5103459号美国专利中也对其详细说明，该专利题目为“SYSTEM AND METHOD FOR GENERATING SIGNAL WAVEFORMSIN A CDMA CHLLULAR TELEPHONE SYSTEM”，转让给本发明受让人，按参考文献在此引入。长PN序列供给乘法器570和572的第1输入端。短PN序列PNI供给乘法器570的第2输入端，短PN序列PNQ供给乘法器572的第2输入端。
乘法器570产生的PN序列供给乘法器562和564各自的第2输入端。乘法器572产生的PN序列供给乘法器566和568各自的第2输入端。乘法器562的乘积序列供给减法器574的加法输入端。乘法器564的乘积序列供给加法单元576的第1加法输入端。乘法器566的乘积序列供给减法器574的减法输入端。乘法器568的乘积序列供给加法单元576的第2加法输入端。
减法器574的差序列供给基带滤波器578。基带滤波器578在差序列上进行必要的滤波，并将滤波后的序列供给增益单元582。增益单元582调整信号的增益，并将增益调整后的信号供给上变频器586。上变频器586按照QPSK调制方式将增益调整后的信号上变频，并将上变频信号供给加法单元590的第1输入端。
加法单元576的和序列供给基带滤波器580。基带滤波器580对差序列进行必要的滤波，并将滤波后的序列供给增益单元584。增益单元584调整信号的增益，并将增益调整后的信号供给上变频器588。上变频器588按照QPSK调制方式将增益调整后的信号上变频，并将上变频信号供给加法单元590的第2输入端。加法单元590将2个QPSK已调信号相加，并将其结果供给发射机(未示出)。
现转到图6a，根据本发明示出基站600中所选部分的功能框图。接收机(RCVR)602接收来自无线通信装置500(图5b)的反向链路RF信号，并将该信号下变频成基带频率。示范实施例中，接收机602按照QPSK解调方式将接收信号下变频。然后，解调器604将基带信号解调。下文参照图6b进一步说明解调器604。
解调的信号供给累加器606。累加器606累加码元功率控制组冗余发送的码元能量。累加所得码元能量供给去交织器608，按照预定去交织格式重新排序。重新排序后的码元供给译码器610进行译码，以提供发送帧估值。然后，将该估值供给CRC校验613，根据发送帧内包含的CRC位判断该帧估值的准确性。
示范实施例中，基站600对反向链路信号进行盲译码。盲译码描述一种接收机事先未知传输速率的可变速率数据译码方法。示范实施例中，基站600根据每一可能的速率假设对数据进行累加、去交织和译码。选择为最佳估值的帧，其依据为质量度量，诸如码元差错率、CRC校验和Yamamoto度量。
每一速率假设的帧估值供给控制处理器617，还供给每一译码估值的一组质量度量。质量度量可包含码元差错率、Yamamoto度量和CRC校验。控制处理器有选择地将一个译码帧供给远端台用户，或宣告帧擦除。
较佳实施例中，图6a所示的译码器603对每一信息信道具有一解调链。示范的译码器603对示范调制器调制的信号进行复数解调。如前文所述，接收机(RCVR)602将接收的反向链路RF信号下变频到基带频率，从而产生Q和I基带信号。解扩器614和616用来自图5a的长码分别将I和Q基带信号解扩。基带滤波器(BBF)618和620分别对I和Q基带信号进行滤波。
解扩器622和624用图5b的PNI序列分别对I和Q信号解扩。同样，解扩器626和628也用图5b的PNQ序列分别对Q和I信号解扩。在组合器630组合解扩器622和624的输出。组合器632中，从解扩器624的输出减去解扩器628的输出。然后，在沃尔什去覆盖器634和636用图5b中覆盖所关注特定信道用的沃尔什码将组合器630和632各自的输出去除沃尔什覆盖。沃尔什去覆盖器634和636各自的输出又由累加器642和644累加到一个沃尔什码元。
组合器630和632各自的输出也由累加器638和640累加到一个沃尔什码元。然后，将累加器638和640各自的输出加给导频滤波器646和648。导频滤波器646和648通过判断导频信号数据534(见图5a)的估计增益和相位，产生信道条件的估值。然后，在复数乘法器650和652中，将导频滤波器646的输出与累加器642和644各自的输出复数相乘。同样，在复数乘法器654和656中，将导频滤波器648的输出与累加器642和644各自的输出复数相乘。然后，在组合器658中，将复数乘法器654的输出与复数乘法器650的输出相加。在组合器660中，从复数乘法器650的输出减去复数乘法器656的输出。最后，在组合器662中组合组合器558和660的输出，产生关注的解调信号。
尽管以上进行特定的说明，得益于此揭示的普通技术人员会了解可在不同结构的设备中实现上述设备而不偏离本发明的范围。与此类似，也可开发并行的方法。作为专用设备的例子，诸如图6b所示加法单元622等一个部件可与加法单元626组合，尽管这两个单元在功能图中画成分开的单元。
信号承载媒体
例如可通过操作基站，执行机器可读指令序列，从而实现上述方法。这些指令可驻留在各种类型信号承载媒体中。在这方面，本发明一实施例涉及一种包含信号承载媒体的编程产品或制品，该媒体为执行上述方法具体实施数字信号处理器可执行的机器可读指令程序。
信号承载媒体可包含任何类型的数字数据存储媒体。例如，此存储媒体包括专用集成电路(ASIC)、基站可访问的数字数据存储装置或光存储装置、电子只读存储器或者其他合适的信号承载媒体。一本发明说明性实施例中，机器可读指令可包含由诸如C、C+、C++或其他编码语言之类的语言编译的软件目标码。
其他实施例
虽然已示出目前考虑的本发明示范实施例，本领域的技术人员会明白，可作各种变换和更改而不偏离所附权利要求书限制的本发明范围。

Claims (23)

1.一种在无线通信系统中预测发送数据的有利时隙的方法，其特征在于包含以下步骤：
通过至少一个第1信道在基站处与远端台之间发送信号，该发送的信号包含话音数据；
在基站处对经至少一个第1信道发送的话音数据测量发射功率电平；
确定至少一个第1信道的动态发射功率电平；
用所述动态发射功率电平选择第2信道发射时隙和数据速率，以在第2信道发送附加数据。
2.如权利要求1所述的方法，其特征在于，还包含以下步骤：
在远端处测量反映从基站处接收的话音数据信号质量的发送度量；
从远端处通知基站处话音数据质量变化或无变化；
考虑所述基站处发送的话音数据，调整或不调整发射功率。
3.一种预测无线通信系统中发送数据的有利时隙的方法，其特征在于，该方法包括下述步骤：
在基站处和远端处之间发送含话音数据的信号；
在基站处对经至少一个第1信道发送的话音数据测量发射功率电平；
确定发射功率电平的历史性分布；
用所述发射功率电平历史性分布选择第2信道发射功率电平、数据速率和在第2信道发送附加数据的发送时隙。
4.一种存储单元，具体实施数字信号处理设备可执行的机器可读指令程序，以执行预测无线通信系统中发射数据的有利时隙的方法，其特征在于，所述存储单元包含：
在基站处和远端处之间发送含话音数据的信号的装置；
在基站处对经至少一个第1信道发送的话音数据测量发射功率电平的装置；
确定动态发射功率电平的装置；
用所述动态发射功率电平选择第2信道发射时隙和数据速率，以在第2信道发送附加数据的装置。
5.一种设备，用于在无线通信系统中预测基站处与远端台之间发送数据的有利时隙，其特征在于所述设备包含：
通信上与远端台耦合的基站处，该基站处可用一个以上的信道与远端台通信，所述基站处包含：
发射机，该发射机能在基站处与远端台之间发送话音数据信号和非话音数据信号；
数字信号处理设备，与所述发射机通信耦合；
所述数字信号处理设备能指行指令，进行以下操作：
在基站处对经至少一个第1信道发送到远端台的话音数据测量发射功率电平；
对经至少一个第一信道进行的发送测量动态发射功率电平；
用动态发射功率电平选择第2信道发送时隙，以在第2信道给远端台发送附加数据。
6.如权利要求5所述的设备，其特征在于还包含：
测量装置，在远端台测量反映从基站处接收的话音数据信号质量的发送度量；
通知装置，将话音数据质量变化或不变化的指示值通知基站处；
考虑所述话音数据质量，对发射功率进行调整或不进行调整的装置。
7.一种在无线通信系统中调度发送的方法，其特征在于包含以下步骤：
确定第一发送信道的动态发射功率；
把第二发送信道的发送调度为所述动态发射功率的函数；和
根据所述动态发射功率选择第二发送信道上数据发送的有利时隙。
8.如权利要求7所述的方法，其特征在于，所述第一发送信道是用于话音发送的基本信道；和
所述第二发送信道是用于数据发送的附加信道。
9.如权利要求7所述的方法，其特征在于，所述无线通信系统是支持高数据速率发送的扩频通信系统。
10.一种在无线通信系统中调度发送的设备，其特征在于包含：
确定第一发送信道的动态发射功率的装置；
把第二发送信道的发送调度为所述动态发射功率的函数的装置；和
根据所述动态发射功率选择第二发送信道上数据发送有利时隙的装置。
11.如权利要求10所述设备，其特征在于，所述时隙是发送非话音数据的有利时隙。
12.如权利要求10所述设备，其特征在于，所述确定动态发射功率的装置包含确定第一发送信道发送的发送度量的装置。
13.如权利要求12所述设备，其特征在于还包含：
监测第一发送信道发送电平的装置；
确定第一发送信道发送电平动态值的装置。
14.如权利要求10所述设备，其特征在于还包含：
监测第一发送信道发送电平的装置；
确定第一发送信道发送电平动态值的装置。
15.如权利要求14所述设备，其特征在于还包含：
确定数据通信是否完成的装置。
16.如权利要求10所述设备，其特征在于，所述第一发送信道是基本信道。
17.如权利要求16所述设备，其特征在于，所述第二发送信道是附加信道。
18.一种在无线通信系统中发送数据的设备，其特征在于所述设备包含：
通过至少一个第1信道从基站处发送信号的装置；
在基站处对经至少一个第1信道发送的话音数据测量发射功率电平的装置；
确定发射功率电平的历史性分布的装置；
用发射功率电平历史性分布选择第2信道发送附加数据时隙的装置。
19.如权利要求18所述设备，其特征在于，所述第一发送信道是基本信道。
20.如权利要求19所述设备，其特征在于，所述第二发送信道是附加信道。
21.如权利要求19所述设备，其特征在于，所述基本信道上第一次发送是非话音数据。
22.如权利要求19所述设备，其特征在于，所述基本信道上第一次发送是话音数据，且所述附加信道上第二次发送是非话音数据。
23.如权利要求22所述设备，其特征在于，所述发送是扩频发送。
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