CN109314552B - 用于控制上行链路波束成形的用户设备过程 - Google Patents

用于控制上行链路波束成形的用户设备过程 Download PDF

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CN109314552B
CN109314552B CN201780029196.9A CN201780029196A CN109314552B CN 109314552 B CN109314552 B CN 109314552B CN 201780029196 A CN201780029196 A CN 201780029196A CN 109314552 B CN109314552 B CN 109314552B
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wireless device
target
estimated
transmitter
determining
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CN109314552A (zh
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T·帕莱纽斯
E·卡里皮迪斯
M·赫斯勒
R·巴尔德梅尔
E·塞曼
B·林肯
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Telefonaktiebolaget LM Ericsson AB
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    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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Abstract

在一方面，具有能够选择性地用于发送波束成形信号的多个发送器链的无线设备确定关于目标接收设备的针对所述波束成形信号的目标接收功率。无线设备基于所述目标接收功率以及基于针对所述多个发送器链中的每个发送器链的估计的功率消耗，选择所述多个发送器链中某一数量的发送器链以用于形成所述波束成形信号。执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗。无线设备使用所述多个发送器链中所选择的某一数量的发送器链来发送所述波束成形信号。

Description

用于控制上行链路波束成形的用户设备过程
技术领域
本公开涉及移动通信网络中的无线设备，并且更具体地涉及用于控制通过这种设备的天线波束成形的技术。
背景技术
在当今广泛部署的无线通信网络中，例如由第三代合作伙伴计划(3GPP)的成员开发的长期演进(LTE)无线数据网络，无线终端(在3GPP文档中被称为“用户设备”或者“UE”)未被配置为在上行链路(无线终端到基站)传输中执行波束成形。预计这将在所谓的第五代(5G)无线网络中发生变化，其中至少一些无线终端将能够使用驱动多个天线元件的多个发送器链在上行链路传输中进行波束成形。
应当理解，一般来说，波束成形是来自一组小的非定向(或低增益)天线的无线电信号的组合以模拟大的定向天线。通过控制每个天线处的信号的相位和幅度，所得到的天线方向图可以被电子地成形和导向，以创建某一波束宽度或者使其在期望方向上的增益最大化。
一般来说，波束成形可以是模拟的或数字的，前者利用模拟移相器在提供给每个天线元件的信号之间创建相位差，后者使用数字技术在发送器阵列的若干天线元件处创建所发送的信号的所需的相移。数字波束成形技术被预期用于5G无线设备。需要若干发送器(TX)链，其中在数字波束成形器中的每个发送器链包括为高功率放大器馈送的数字可控信号源，其然后耦合到阵列中的若干发送器元件之一。天线元件一起形成天线孔径。用于驱动天线孔径的发送器链越多，波束就能够越窄。
在每个发送器链中，可以单独控制驱动天线元件的信号的相移和幅度。通过使用多个发送链并控制从每个链发送的信号的相位和幅度，使得它们在一个方向上建设性地相加，同时在其他方向上相消地相加，来实现波束成形。尤其是当存在多于两个发送器时，这导致在某些方向上的整体天线增益和在其他方向上的损耗。图1示出了具有四个天线元件的示例发送波束成形器。如图所示，每个天线元件由高功率放大器馈送，每个高功率放大器又由复合加权元件馈送，其将相移θk和幅度权重ak应用于要发送的信号的副本。相移和幅度权重一起构成复合权重wk。在数字波束成形器中，例如，在将加权信号的基带版本上变频到射频信号以进行放大和传输之前，数字地执行这种相移和幅度加权。
波束成形的好处是多方面的，包括增强的覆盖范围，使用相同输出功率的更长的实现范围，以及在许多情况下，接收器侧的多径更少。可以显著减少对其他无线电链路的干扰的可能性，因为无线终端不在除了预期接收器的方向之外的方向上传送大量能量。这也提高了效率，因为发送的信号不会以对其他方向的其他接收器的干扰的形式而被浪费。
虽然上行链路波束成形可用于提供显著的性能增益，但关键的权衡是设备的功率消耗。波束成形设备中的每个不同的发送链包括功率放大器，以及可能包括附加的模拟组件，例如混频器和本地振荡器放大器。这些组件中的每一个组件都消耗额外的功率，其中的一些功率与该链产生的信号幅度无关。结果，即使来自所组合的发送器的总输出功率与仅使用一个发送器时的总输出功率相同，但是当使用若干发送器链时的总功率消耗可能实际上更高。因此，通过组合来自若干发送器链的信号所产生的窄波束需要比具有相同发送功率的非定向波束更高的功率消耗。
窄波束的另一个问题是，与更宽或非定向波束相比，它们对无线设备的方向的变化更敏感。
发明内容
本发明的实施例提供了用于解决上述问题的无线设备的波束成形解决方案。这可以包括控制用于通信的活动发送天线的数量的无线设备(例如，UE)，以便在仍然保持上行链路覆盖范围的同时最小化功率消耗。
根据一些实施例，在具有能够选择性地用于发送波束成形信号的多个发送器链的无线设备中的方法包括：确定关于目标接收设备的针对波束成形信号的目标接收功率。该方法还包括：基于目标接收功率以及基于针对多个发送器链中的每个发送器链的估计的功率消耗，选择多个发送器链中某一数量的发送器链以用于形成波束成形信号，其中执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗。该方法还包括：使用多个发送器链中所选择的某一数量的发送器链来发送波束成形信号。
根据一些实施例，无线设备包括：多个发送器链，其能够选择性地用于发送波束成形信号，以及处理电路，其可操作地与多个发送器链相关联。处理电路被配置为确定关于目标接收设备的针对波束成形信号的目标接收功率，以及基于目标接收功率以及基于针对多个发送器链中的每个发送器链的估计的功率消耗，选择多个发送器链中某一数量的发送器链以用于形成波束成形信号。执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗。处理电路被配置为使用多个发送器链中所选择的某一数量的发送器链来发送波束成形信号。
本发明的其他方面涉及与上面概述的方法和上述概括的装置和无线设备的功能实现相对应的装置、计算机程序产品或计算机可读存储介质。
当然，本发明不限于上述特征和优点。通过阅读以下详细描述并查看附图，本领域普通技术人员将认识到另外的特征和优点。
附图说明
图1示出了具有四个天线元件的示例发送波束成形器。
图2是示出根据本公开技术的一些实施例的示例过程的过程流程图。
图3是根据一些实施例的无线设备的框图。
图4示出了根据一些实施例的无线设备中的方法。
图5是示出根据一些实施例的无线设备的功能实现的框图。
具体实施方式
下面的描述是用于控制信号的波束成形的技术和装置的若干实施例的详细示例。这些技术在无线终端中可能特别有益，但不限于此，并且可以在具有多个发送天线的任何发送无线设备中实现。此外，尽管在本公开中使用诸如“5G”的术语来将本公开的技术和装置置于示例上下文中，但是这不应被视为将本发明的范围限制于仅5G系统。其他无线系统也可以从利用本公开内容所涵盖的构思中受益。
因为本文描述的技术不限于它们应用于无线终端，所以诸如基站和UE之类的术语除非上下文另有明确指示，否则实际上应当被视为示例性且非限制性的，并且特别地不暗示两者之间的某种分级关系；通常，“基站”可以被认为是设备1，“UE”可以被认为是设备2，其中这两个设备通过某个无线电信道彼此通信。
如上所述，虽然无线设备中的波束成形可以用于获得实质性的性能益处，例如在降低干扰的同时改善链路质量，但是在某些情况下波束成形设备的总功率消耗可能不合需要地高。如上所述，波束成形设备中的每个不同的发送链包括功率放大器和可能的其他模拟组件，这些组件中的每一个组件消耗额外的功率，其中的一些功率与该链产生的信号幅度无关。因此，即使波束成形发送器的总输出功率与仅使用一个发送器时的总输出功率相同，但是从使用若干发送器链产生的总功率消耗也可能实际上更高。
如上所述，与较宽或非定向波束相比，窄波束对无线设备的方向变化更敏感。虽然窄波束可以提供最高可能的链路增益并因此支持最高可能的数据速率，但这仅发生在其适当地指向接收基站或设备的情况下。使用便携式无线终端，这可能难以始终如一地实现，因为终端的定向经常变化。因此，在形成波束成形信号时要考虑的另一个权衡是波束宽度与指向该波束所需的准确度之间的权衡。
无线设备发送器的功率消耗由总发送功率和发送链的数量决定。根据本公开的若干技术，基于目标设备处的期望接收信号功率，通过改变用于执行波束成形信号的发送天线的数量来优化无线设备的功率消耗。通过在环境允许时减少发送天线的数量，减少与发送链的数量相关的功率消耗。当然，同时在预期方向上(即，在天线主瓣的峰值处)的最大可能的天线增益减小。结果，当减少用于形成波束成形信号的发送天线的数量时，可能需要增加发送功率，因为在最坏的情况下，最大上行链路功率不足以到达具有预期的数据速率的目标设备(例如，5G基站)。
根据本公开的技术的若干实施例，然后，UE或其他无线设备根据目标设备处的期望接收信号功率和发送设备和接收设备之间的估计的传播损耗来控制活动发送天线的数量，以便在最小化功率消耗的同时仍然保持上行链路覆盖范围。接收设备处的目标接收信号功率进而可以根据针对链路的期望数据速率来确定。
因此，取决于链路覆盖范围，在优化功率消耗和功率效率时存在权衡。这些权衡基本上是基于在增加发送天线数量时覆盖范围的改善(与减少发送天线数量时的功率消耗降低相比)来优化长期功率消耗。这可以在UE或无线设备中基于设备对发送链的功率消耗、下行链路和/或上行链路中的传播损耗的估计以及链路中的预期数据速率的知识来执行。利用传播损耗的估计，可以估计特定数据速率所需的传输功率。要优化的数据速率可以基于预期的数据速率或发送缓冲器中的数据量。
对于UE或其他无线设备改变用于形成波束成形信号的发送器链的数量而言有其他潜在益处。例如，当使用更宽的天线波瓣时，无线电链路对正在移动的UE不太敏感。汽车中处于不连续接收(DRX)模式中的手持UE由于UE的握持方式的改变以及车辆方向的改变而可以改变方向。如果不够频繁地进行链路质量的测量，以便可以快速调整波束的方向以跟踪这些变化，则存在波束在错误方向中传送的风险。如果该概率高，则具有更宽的天线波束可能是有益的。因此，当确定应当使用多少发送器链来形成波束成形信号时，所公开技术的一些实施例包含关于无线设备的运动和/或类型的信息。
根据本公开的技术的一些实施例，UE或其他无线设备因此选择多个活动发送链以用于产生波束成形信号，以便以有限的接收数据速率损失来节省功率。减少发送链数量的直接优点是可以降低功率消耗。然而，与此同时，天线增益存在权衡。当通过使用较少的发送链来降低增益时，这也意味着需要增加设备的发送功率，以保持相同的数据速率。在选择要使用的发送链的数量时，还考虑了发送功率的这种增加。
当覆盖范围良好时，即，当无线设备和目标接收器之间的估计的传播损耗相对较低时，所需的发送功率将相对较低。在这种情况下，在选择较少数量的发送链时补偿降低的天线增益所需的额外发送功率可能低于使用更多发送链所需的功率。因此，通过减少发送链的数量来降低总功率消耗。相反，当无线设备和目标接收器之间的传播损耗相对较高时，可能需要更窄的波束和更高的天线增益来维持期望的链路质量和数据速率。当然，这些条件会不时变化，有时会快速变化。因此，UE或其他无线设备通过改变所使用的发送天线链的数量来周期性地评估是否可以改善功率消耗。
根据一些实施例，评估基于以下步骤。
首先，无线设备确定到达目标设备(例如无线网络中的基站)所要求的天线增益。该要求根据无线设备和目标接收器之间的传播损耗，其可以基于由无线设备执行的链路质量测量来估计，或者由目标设备执行链路质量测量并将它反馈到无线设备，或两者的组合。所要求的天线增益也基于期望的数据速率，对于任何给定的调制和编码方案而言，其将进而来规定接收设备处的最小的信号与噪声加干扰比(SINR)。
其次，无线设备基于到达目标设备所需的天线增益来确定要使用的发送器的数量。可以基于以下参数来指定无线设备中的发送器的数量：作为发送功率的函数的每个发送器的功率消耗；对于每个可配置数量的使用的发送器，在天线方向图的主瓣中达到的天线增益；无线设备和目标接收器之间估计的传播损耗；以及目标接收器处的所期望的接收功率。
无线设备还可以基于无线设备处的可用空间信道知识的数量和质量来确定要使用的发送链的数量，其中该空间信道知识提供以下指示：无线设备可以假设通过缩小和加宽波束能够增加或减小多少的接收器功率。具有低质量的信道的知识，不能期望较窄的传输波束在实际中产生全增益。
考虑到使用每个所考虑数量的发送链可实现的天线增益，关于发送链数量的决定可以至少部分地基于能够达到多高的数据速率的估计。可达到的数据速率的估计基于链路的估计的传播损耗，以及在活动通信期间可以基于用于当前配置的功率命令和达到的数据速率。
在一些实施例中，上行链路的估计的传播损耗和/或上行链路的估计的数据速率可以基于基站中的上行链路测量，上行链路测量被发信号通知给无线设备以供无线设备用于确定多少发送链用于对上行链路传输进行波束成形。估计的上行链路传播损耗和/或数据速率也可以或替代地基于在UE中测量的下行链路传播损耗和干扰水平。
可以预先确定或固定无线设备执行上述评估的时段或重复这些评估的重复率。还可以基于若干不同因素中的任何因素来动态地确定该时段和/或重复率。在一个示例中，该时段可以是无线设备的速度的函数，以及可以随着UE移动的更快而减小。在另一示例中，该时段可以是设备类型的函数，其还定义了设备被预期要用于的应用的类型。例如，连接到高速列车的设备可以被配置为比连接到低速车辆的设备的时段短的时段。在又一示例中，该时段可以是UE被配置为使用的功率消耗设置/模式的函数。例如，如果UE由于电池限制或任何其他原因而被设置为在功率节省模式中操作，则该时段可能比其他功率设置相对更大。
图2是示出根据本公开技术的一些实施例的示例过程的过程流程图。关于执行上行链路传输的UE来说明和描述该过程。然而，应该理解，类似的技术可以由其他设备应用于其他类型的无线链路，例如基站和UE之间的下行链路，或者从一个UE到另一个UE的点对点传输。对于本文示出和描述的其他技术也是如此。
如框210所示，UE被配置为在上行链路(UL)中发送数据。然后，对于给定数量的发送天线链，它基于从UE到接收基站的传播损耗的估计，或者基于重传的计数，或者两者的某种组合来估计UL覆盖范围和数据速率。这在框220处示出。基于此，它对将导致增加或减少UE中的发送链的数量的可能的性能增益/损失进行估计。这在框230、240、250和260处示出。如框230和240所见，如果由于可以通过链路发送而增加的数据速率和/或由于传播条件恶化，确定需要改善上行链路覆盖范围，即，增加目标接收器处的接收功率，则上行链路中的发送器的数量增加。将理解的是，这通常需要增加功率消耗，但是在这种情况下，对改进的链路性能的需求可能是优先考虑的。然而，如果不需要增加链路性能，则UE通过减少用于形成波束成形信号的发送链的数量来评估是否可以降低上行链路天线增益，使得即使总发送功率增加，但是存在总功率消耗中的整体降低。这在框250处示出。如果是，则如框260所示减少上行链路波束成形器中的发送链的数量。否则，不改变。
在一些实施例中，在UE特定配置步骤中动态地启用如上所述的过程。换句话说，在一些实施例和/或实例中，UE可以接收激活或停用图2中所示的评估和调整的配置信息，或一些类似的过程。在一些实施例中，可以根据系统广播消息来完成该配置。例如，可以根据网络中的业务情况来完成该配置。例如，当任何潜在的干扰增加将不会影响网络性能时，可以在低流量负载下启用该特征。在一些实施例中，根据UE类别完成该配置，即，对于电池寿命很重要的UE启用该特征，但是对于高流量、尽力而为的UE禁用该特征。在一些实施例中，可以将一些UE类别设计为始终使用本公开描述的技术，而无需任何配置步骤。
图3示出了无线设备50的图，无线设备50被配置为将信号发送到目标接收设备。无线设备50可以被认为代表可以在网络中操作的任何无线发送器，例如蜂窝网络中的UE。一些示例可以包括通信设备、目标设备、设备到设备(D2D)UE、机器类型无线设备或能够进行机器到机器通信的无线设备(M2M)、配备有UE的传感器、PDA(个人数字助理)、平板电脑、移动终端、智能电话、便携式电脑嵌入式设备(LEE)、便携式电脑安装的设备(LME)、USB加密狗、用户驻地设备(CPE)等。尽管在各种实施例中无线设备50可以是UE，但这并不排除无线设备50可以表示将利用本文描述的技术的某种网络节点或网络节点的一部分的可能性。
在该示例中，无线设备50被配置为经由多个天线54和发送器电路56与广域蜂窝网络中的无线电节点或基站通信。发送器电路56可以包括放大器、转换器、滤波器和任何相关的控制电路，出于使用蜂窝通信服务的目的，它们一起被配置为根据无线电接入技术来发送信号。出于讨论的目的，该无线电接入技术是5G无线电接入技术，但是在各种实施例中，无线设备可以适用于其他无线电接入技术。通常，无线设备50还包括用于接收信令的接收器电路。天线54可以包括天线元件，它们一起形成能够进行波束成形操作的天线孔径。
无线设备50还包括与无线电收发器电路56可操作地相关联的一个或多个处理电路52。处理电路52包括一个或多个数字处理器62，例如，一个或多个微处理器、微控制器、数字信号处理器(DSP)、现场可编程门阵列(FPGA)、复杂可编程逻辑器件(CPLD)、专用集成电路(ASIC)或其任何混合。更一般地，处理电路52可以包括固定电路或可编程电路，其通过执行实现本文教导的功能的程序指令而被特别适配，或者可以包括固定电路和编程电路的某种混合。处理电路52可以是多核的。
处理电路52还包括存储器64。在一些实施例中，存储器64存储一个或多个计算机程序66，以及可选地存储配置数据68。存储器64为计算机程序66提供非暂时性存储，并且它可以包括：一种或多种类型的计算机可读介质，例如磁盘存储器、固态存储存储器或其任何混合。这里，“非暂时性”意味着永久性、半永久性或至少临时持久性存储，并且包括非易失性存储器中的长期存储和例如用于程序执行的工作存储器中的存储两者。作为非限制性示例，存储器64包括SRAM、DRAM、EEPROM和FLASH存储器中的任何一个或多个，其可以在处理电路52中和/或与处理电路52分离。通常，存储器64包括一种或多种类型的计算机可读存储介质，其提供用户设备50使用的计算机程序66和任何配置数据68的非暂时性存储。处理电路52可以例如通过使用存储在存储器64中的适当的程序代码来配置以执行下文详述的方法和/或信令过程中的一个或多个。
发送器电路56可以包括驱动天线孔径的多个发送器链。这些发送器链通常包括高功率放大器以及可以包括其他模拟电路，例如滤波器、上变频混频器等，这些发送器链在功能上由发送器电路56的分开的部分56A-56D表示。这些发送器链可以由处理电路52选择性地使用。也就是说，一些发送器链被开启或激活以用于波束成形的传输，而其他发送器链不被开启或激活用于波束成形的传输。这提供了对传输功率资源的更好管理。
在数字方法的一些实例中，处理电路52执行信号生成和基带处理。这些信号被馈送到所选择的发送器链，其可以包括简单的发送器元件以驱动天线54中的相应天线。在模拟方法的实例中，来自处理电路52的信号在被放大并通过相应的天线传输之前，可以通过某些发送器链的权重和移相器。图1说明了发送器链的一些模拟组件。
根据一些实施例，处理电路52被配置为确定关于目标接收设备的针对波束成形信号的目标接收功率。处理电路52还被配置为基于目标接收功率以及基于针对多个发送器链中的每个发送器链的估计的功率消耗，选择多个发送器链中某一数量的发送器链以用于形成波束成形信号，其中执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗。处理电路52还被配置为使用多个发送器链中所选数量的发送器链来发送波束成形信号。
根据一些实施例，处理电路52执行图4所示的方法400，其包括确定关于目标接收设备的针对波束成形信号的目标接收功率(框402)。方法400还包括基于目标接收功率以及基于针对多个发送器链中的每个发送器链的估计的功率消耗，选择多个发送器链中某一数量的发送器链以用于形成波束成形信号，其中执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗(框404)。方法400还包括使用多个发送器链中所选数量的发送器链来发送波束成形信号(框406)。
方法400可以包括基于无线设备和目标接收器之间的估计的路径损耗来确定目标接收功率。由于无线设备中的上行链路天线波束是目标，因此可以在上行链路中测量接收功率。无线设备不能测量该接收功率，因此目标接收器(例如，eNodeB)可能必须用信号通知接收功率。因此，可以从无线设备接收的信令获得估计的路径损耗。无线设备可以从目标接收器接收上行链路信号的接收功率和/或下行链路信号的传输功率。在一些情况下，可能更容易测量下行链路信号的接收功率，其可以类似于上行链路信号的接收功率。取决于所使用的频率或其他因素，下行链路信号的接收功率可以与上行链路信号的接收功率类似但不相同。目标接收功率的确定还可以基于估计的干扰水平和/或用于到目标接收设备的传输的目标数据速率。
在一些实施例中，选择多个发送器链的数量包括：基于目标接收功率以及基于每个发送器链对目标接收功率的估计的贡献，针对发送器链中的至少一组发送器链确定该组中的每个发送器链的期望的输出功率。该确定可以涉及基于目标接收功率以及基于每个发送器链的估计的贡献或查找表的使用(其中目标功率和估计的贡献是输入参数)或者两者的某一结合来进行期望的输出功率的计算。该选择还包括基于各自的发送器链的期望的输出功率来确定该组中的每个发送器链的估计的功率消耗。此外，估计的功率消耗的这种确定可以涉及计算、查找表或两者的某种组合。估计的贡献可以是对天线波瓣中的功率和增益的估计。该估计还可以基于估计的干扰水平。因此，方法400可以包括基于无线设备所拥有的估计的信道信息的质量来确定每个发送器链对目标接收功率的估计的贡献。
确定、选择和发送可以重复一次或多次。在某些情况下，周期性地重复确定、选择和发送。对于重复确定、选择和发送可以存在时间间隔。该时间间隔可以基于无线设备的估计的速度和/或配置的功率模式。
时间间隔也可以基于对环境的估计的变化。例如，变化的路径损耗或更频繁地需要调整传输功率可以指示室内或室外环境的变化。无线设备还可以接收关于环境的信息或无线设备和目标接收设备的位置。在一些实施例中，可以基于检测到的环境中的变化来减小时间间隔以增加确定、选择和发送将被重复的频率。
无线设备可以是无线通信网络中的UE，目标接收设备可以是无线通信网络中的基站。方法400还可以包括从无线通信网络接收激活优化模式的配置信息，根据该配置信息执行上述确定，选择和发送步骤。
如上面详细讨论的，这里描述的技术(例如，如图2和4的过程流程图所示)可以使用由一个或多个处理器执行的计算机程序指令来全部或部分地实现。将理解的是，这些技术的功能实现可以用功能模块来表示，其中每个功能模块对应于在适当的处理器中执行的软件的功能单元或功能数字硬件电路，或两者的某种组合。
例如，图5示出了可以在具有多个发送器链的无线设备50中实现的示例功能模块或电路架构，该发送器链能够选择性地用于发送波束成形信号。该实现包括确定模块502，用于确定关于目标接收设备的针对波束成形信号的目标接收功率。该实现还包括选择模块504，用于基于目标接收功率以及基于针对多个发送器链中的每个发送器链的估计的功率消耗，选择多个发送器链中某一数量的发送器链以用于形成波束成形信号，其中执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗。该实现还包括发送模块506，用于使用多个发送器链中所选择的某一数量的发送器链来发送波束成形信号。
当然，在不脱离本发明的基本特征的情况下，本发明可以以不同于本文具体阐述的方式的其他方式来实现。本发明的实施例在所有方面都被认为是说明性的而非限制性的。

Claims (29)

1.一种在具有多个发送器链(56)的无线设备(50)中的方法(400)，所述多个发送器链能够选择性地用于发送波束成形信号，所述方法(400)包括：
确定(402)关于目标接收设备的针对所述波束成形信号的目标接收功率；
基于所述目标接收功率以及基于针对所述多个发送器链(56)中的每个发送器链的估计的功率消耗，选择所述多个发送器链(56)中某一数量的发送器链以用于形成所述波束成形信号，其中执行所述选择(42)以便考虑到估计的功率消耗来最小化总功率消耗；和
使用所述多个发送器链(56)中所选择的某一数量的发送器链来发送(406)所述波束成形信号。
2.根据权利要求1所述的方法(400)，其中，确定(402)所述目标接收功率基于所述无线设备(50)与目标接收器之间的估计的路径损耗。
3.根据权利要求2所述的方法(400)，其中，所述估计的路径损耗是从所述无线设备(50)接收的信令中获得的。
4.根据权利要求2或3所述的方法(400)，其中确定(402)所述目标接收功率还基于估计的干扰水平。
5.根据权利要求2-4中任一项所述的方法(400)，其中确定(402)所述目标接收功率还基于用于到所述目标接收设备的传输的目标数据速率。
6.根据权利要求1-5中任一项所述的方法(400)，其中选择(40)所述多个发送器链(56)中某一数量的发送器链包括：
针对发送器链(56)中的至少一组发送器链，基于所述目标接收功率以及基于每个发送器链对所述目标接收功率的估计的贡献，确定该组中每个发送器链的期望的输出功率；和
基于各自的发送器链的期望的输出功率，确定该组中每个发送器链的估计的功率消耗。
7.根据权利要求6所述的方法(400)，还包括：基于所述无线设备(50)所拥有的信道信息的估计的质量，确定每个发送器链对所述目标接收功率的估计的贡献。
8.根据权利要求1-7中任一项所述的方法(400)，其中权利要求1的确定(402)、选择(404)和发送(406)被重复一次或多次。
9.根据权利要求8所述的方法(400)，其中周期性地重复权利要求1的确定(402)、选择(404)和发送(406)。
10.根据权利要求8或9所述的方法(400)，其中，用于重复权利要求1的确定(402)、选择(404)和发送(406)的时间间隔基于无线设备(50)的估计的速度。
11.根据权利要求8或9所述的方法(400)，其中，用于重复权利要求1的确定(402)、选择(404)和发送(406)的时间间隔基于无线设备的配置的功率模式(50)。
12.根据权利要求1-11中任一项所述的方法(400)，其中，所述无线设备(50)是无线通信网络中的用户设备UE，所述目标接收设备是所述无线通信网络中的基站。
13.根据权利要求12所述的方法(400)，其中所述方法(400)还包括从所述无线通信网络接收激活优化模式的配置信息，其中根据所述配置信息执行权利要求1的步骤。
14.一种无线设备(50)，包括：
多个发送器链(56)，其能够选择性地用于发送波束成形信号；和
处理电路(52)，其可操作地与所述多个发送器链(56)相关联，并被配置为：
确定关于目标接收设备的针对所述波束成形信号的目标接收功率；
基于所述目标接收功率以及基于针对所述多个发送器链(56)中的每个发送器链的估计的功率消耗，选择所述多个发送器链(56)中某一数量的发送器链以用于形成所述波束成形信号，其中执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗；和
使用所述多个发送器链(56)中所选择的某一数量的发送器链来发送所述波束成形信号。
15.根据权利要求14所述的无线设备(50)，其中，所述处理电路(52)被配置为基于所述无线设备(50)与目标接收器之间的估计的路径损耗来确定所述目标接收功率。
16.根据权利要求15所述的无线设备(50)，其中，所述估计的路径损耗是从所述无线设备(50)接收的信令中获得的。
17.根据权利要求15或16所述的无线设备(50)，其中，所述处理电路(52)被配置为还基于估计的干扰水平来确定所述目标接收功率。
18.根据权利要求15-17中任一项所述的无线设备(50)，其中，所述处理电路(52)被配置为还基于用于到所述目标接收设备的传输的目标数据速率来确定所述目标接收功率。
19.根据权利要求14-18中任一项所述的无线设备(50)，其中，所述处理电路(52)被配置为通过以下方式选择所述多个发送器链(56)中某一数量的发送器链：
针对发送器链(56)中的至少一组发送器链，基于所述目标接收功率以及基于每个发送器链对所述目标接收功率的估计的贡献，确定该组中每个发送器链的期望的输出功率；和
基于各自的发送器链的期望的输出功率，确定该组中每个发送器链的估计的功率消耗。
20.根据权利要求19所述的无线设备(50)，其中，所述处理电路(52)被配置为基于所述无线设备(50)所拥有的信道信息的估计的质量来确定每个发送器链对所述目标接收功率的估计的贡献。
21.根据权利要求14-20中任一项所述的无线设备(50)，其中权利要求14的确定、选择和发送操作被重复一次或多次。
22.根据权利要求21所述的无线设备(50)，其中，周期性地重复权利要求14的确定、选择和发送操作。
23.根据权利要求21或22所述的无线设备(50)，其中，用于重复权利要求14的确定、选择和发送操作的时间间隔基于所述无线设备(50)的估计的速度。
24.根据权利要求21或22所述的无线设备(50)，其中，用于重复权利要求14的确定、选择和发送操作的时间间隔基于所述无线设备(50)的配置的功率模式。
25.根据权利要求14-24中任一项所述的无线设备(50)，其中，所述无线设备(50)是无线通信网络中的用户设备UE，所述目标接收设备是所述无线通信网络中的基站。
26.根据权利要求25所述的无线设备(50)，其中，所述处理电路(52)被配置为从所述无线通信网络接收激活优化模式的配置信息，其中根据所述配置信息执行权利要求14的处理电路的操作。
27.一种被配置为在无线通信网络中操作的无线设备(50)，所述无线设备(50)适于执行根据权利要求1-13中任一项所述的方法。
28.一种存储计算机程序(66)的非暂时性计算机可读存储介质(64)，所述计算机程序包括程序指令，所述程序指令在具有能够选择性地用于发送波束成形信号的多个发送器链的无线设备(50)的至少一个处理电路(52)上执行时(56)，将无线设备(50)配置为：
确定关于目标接收设备的针对所述波束成形信号的目标接收功率；
基于所述目标接收功率以及基于针对所述多个发送器链中的每个发送器链的估计的功率消耗，选择所述多个发送器链(56)中某一数量的发送器链以用于形成所述波束成形信号，其中执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗；和
使用所述多个发送器链(56)中所选择的某一数量的发送器链来发送所述波束成形信号。
29.一种无线设备(50)，其具有多个发送器链(56)，所述多个发送器链能够选择性地用于发送波束成形信号，所述无线设备(50)包括：
确定模块(502)，用于确定关于目标接收设备的针对所述波束成形信号的目标接收功率；
选择模块(504)，用于基于所述目标接收功率以及基于针对所述多个发送器链(56)中的每个发送器链的估计的功率消耗，选择所述多个发送器链(56)中某一数量的发送器链以用于形成所述波束成形信号，其中执行所述选择以便考虑到估计的功率消耗来最小化总功率消耗；和
发送模块(506)，用于使用所述多个发送器链(56)中所选择的某一数量的发送器链来发送所述波束成形信号。
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