CN104067673A - 控制上行链路控制信道的功率电平 - Google Patents
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Abstract
一种技术,包括:在作为协作多点接收发送/接收(CoMP)***的部分的移动站中从基站接收消息,其标识对于移动站或对于由移动站使用的接收集合特定的至少一个参数;以及至少部分基于参数来调节移动站的通信中的功率。
Description
背景技术
为了改进无线通信性能,可以使用基于多输入/多输出(MIMO)的***,其为每一条通信信道使用多个发射机和多个接收机。对于第三代合作伙伴项目(3GPP)长期演进(LTE),将MIMO***实施为协作多点发送/接收(CoMP)技术,在其中,协调并组合来自多个发射和接收天线的信号。针对上行链路和下行链路通信的该通信的协调/组合增强了通信性能和质量,尤其对于位于特定小区边缘附近的移动站(称为“用户设备”)而言。
更具体地,给定移动站可以布置在小区边缘附近,因而移动站可以从多个小区的多个接入点接收信号。CoMP技术通过在几个小区之间联合调度与移动站的通信来解决潜在的干扰问题,而不是移动站与单个小区通信的可替换方案。对于上行链路通信(将数据从移动站发送到基站的通信),CoMP技术包括在多个接收天线共同接收来自移动站的数据。对于下行链路通信(由移动站接收数据的通信),CoMP技术协调在多个传输天线与移动站之间的传输。
附图说明
图1是示出根据示例性实现方式的无线通信***的小区的示意图。
图2是示出根据示例性实现方式的用以调节上行链路控制信道的功率电平的移动站特定技术的流程图。
图3是示出根据示例性实现方式的按照图2的技术的在移动站与基站之间的通信的信号流图。
图4是示出根据示例性实现方式的用以调节上行链路控制信道的功率电平的接收点集特定技术的流程图。
图5是示出根据示例性实现方式的按照图4的技术的传送在移动站与基站之间的信号的信号流图。
图6是根据示例性实现方式的移动站的示意图。
具体实施方式
参考图1,为了增强在移动用户设备(本文称为“移动站30”)与基站32(例如,其中每一个基站32都包括无线接入点24和演进节点B(enB)31)之间的无线通信的通信质量和性能,无线通信***10使用多输入/多输出(MIMO)发送和接收方案。MIMO是使用多个发射机和接收机天线来同时传送更多数据的无线技术。通常,MIMO利用称为“多路径”的无线电通信现象,其中,发送的信息在墙壁、天花板及其他物体反射,借助不同的角度并在略微不同的时间多次到达接收天线。MIMO技术通过借助用以增大性能和范围的增加的空间尺寸使用多个开始发送和接收点来利用多路径行为。多个天线同时发送和接收多个空间流,这允许天线同时进行发射和接收。MIMO使得天线能够组合来自不同路径在不同时间到达的数据流,以有效地增大接收机信号捕获功率。
作为更具体的示例,根据本文公开的技术和***,在无线通信***10内的无线通信按照协作的多点发送/接收(CoMP)技术来进行,其中,给定移动站30使用多个发射点和多个接收点来进行通信。以此方式,在无线通信***10中,移动站30可以以协作方式与多个小区20的基站32进行通信。
更具体地,根据一些实现方式,移动站30可以按照第三代合作伙伴项目(3GPP)长期演进(LTE)标准(“LTE标准”)与基站32通信,其中,不在与控制数据相同的信道中传送数据。以此方式,按照LTE标准,给定移动站30可以通过相关物理上行链路控制信道(PUCCH)发送上行链路控制信息。因而,无线通信***10的每一个移动站30都使用相关PUCCH来传送控制数据,这调节了通过用户数据信道的通信。为了协调通过不同PUCCH的传输并防止在PUCCH之间的干扰,无线通信***10调节不同PUCCH的功率电平。
按照3GPP LTE标准的第10版,在每个小区的基础上调节PUCCH的功率电平。换句话说,调节由相同小区20内的移动站30使用的PUCCH以具有相同的功率电平。但这样的方案可能不足以适当地控制在邻近小区上行链路传输中对由小区边缘附近的移动站30所使用的PUCCH的干扰。
因此,根据本文公开的技术和***,基于特定移动站30的身份或者基于由给定移动站使用的特定接收点集配置的身份(取决于特定实现方式),连同潜在的其他移动站一起调节用于给定移动站30的给定PUCCH的功率电平。这样,可以独立调节用于相同小区20内的移动站30的PUCCH的功率电平,因而可以为了增强通信质量和性能而相对于彼此进行改变。
现在转向更具体的细节,根据一些实现方式,用于给定PUCCH的功率电平(以下称为“PPUCCH(i)”)可以是几个因子的函数:
等式1
其中,“ΔF_PUCCH(F)”表示表征PPUCCH(i)功率电平的关键参数,并在以下用于归类PUCCH的功率电平:用于ΔF_PUCCH(F)参数的较大值表示用于PUCCH的相应的相对较大的功率,用于ΔF_PUCCH(F)参数的较小值表示用于PUCCH的相应的相对较小的功率。通常,可以在由给定小区20的移动站30所使用的PUCCH信道中改变ΔF_PUCCH(F)参数,如本文所述地为了补偿这些信道的功率电平中的差,以使得信道间干扰最小。在题为“物理层过程”的第三代合作伙伴项目(3GPP)技术规范(TS)36.213的5.1.2节(V.10.2.0,Rel.10(2010))中说明了等式1的其他参数。
通常,用于ΔF_PUCCH(F)参数的可用值的集合部分地由PUCCH格式来控制。以此方式,给定PUCCH格式取决于诸如调制方案、每个子帧的位数量和用于PUCCH通信的控制信息的类型之类的因素。在信息单元(IE)中定义了用于给定格式的ΔF_PUCCH(F)参数的可用特定值,例如在题为“RRC协议规范”的第三代合作伙伴项目(3GPP)技术规范(TS)36.213的5.1.2节V.10.3.0,Rel.10(2011)中所述的IE:
在上述的IE中,每一个枚举组都以分贝(dB)为给定格式指定三个可能的参数。在这个表示中,分贝在“deltaF”标识符后面。对于以上示例,对于格式1,IE指定可能的以下值:-2dB、0dB和2dB。
本文称为“DeltaFList-PUCCH IE”的上述IE包括在称为“上行链路功率控制公共IE”的另一个IE中,它被定义如下:
上行链路功率控制公共IE进一步包括在称为“无线资源配置公共IE”的另一个IE中,其由无线资源信道(RRC)***信息块(SIB)消息广播。
可以针对其他格式指定DeltaFList-PUCCH IE参数。在这点上,根据一些实现方式,无线通信***10可以使用格式3或具有信道选择(格式1bCS)的格式1,其在“上行链路功率控制公共-v1020IE”中被定义:
上行链路功率控制公共-v1020IE也包括在RRC SIB消息中。
参考图2,根据本文公开的***和技术,技术50可以用于调节与特定移动站30相关的给定上行链路控制信道的功率电平的目的。按照技术50,基站32发送单播消息,其以特定移动站30为目标,用于调节移动站的PUCCH信道的功率电平的目的。在这点上,单播消息由移动站30接收(块54),并标识用以控制相关上行链路控制信道的功率电平的参数。移动站30应用(块58)该参数,以便使用(块62)参数来调节其相关上行链路控制信道的功率电平。因而,与用于控制PUCCH的功率电平的在前方案相反,确定用于控制由特定移动站30所使用的PUCCH的功率电平的特定参数,且所述特定参数用于控制PUCCH的功率电平,代替包括将给定小区中所有PUCCH的功率电平调节为相同的功率电平的方案。
参考图3,根据本文公开的实现方式,上述单播消息包含用于ΔF_PUCCH(F)参数的移动站特定IE,它可以被说明如下:
以此方式,根据一些实现方式,给定基站32(例如参见图1)可以在上行链路CoMP状况改变时为给定移动站30计算ΔF_PUCCH(F)值(依据一个枚举的可选择值),并借助单播消息(即借助特定地以移动站30为目标的消息)向移动站30传送新的ΔF_PUCCH(F)参数。
作为更具体的实例,根据示例性实现方式,结合图2的技术50进行的在基站节点32与移动站30之间的信号传输可以由图3的信号流图100来说明。如图3所示的,移动站30可以持续地与基站32传送(110)移动站30的上行链路CoMP或非CoMP配置的状态。在这点上,移动站30可以通过使用来自基站32的支持信息在在前阶段中处于上行链路CoMP状态中。在此情况下,由移动站30提供的上行链路信号可以由给定接收点集(一个接收点或多个接收点,取决于特定接收点集配置)接收/处理。但移动站30可以不在上行链路CoMP状态中。在此情况下,可以按照在诸如3GPPLTE第10版中阐述的非CoMP处理标准来处理由移动站30提供的上行链路信号。
基站32连续监控(112)在多个接收点(相同小区ID或不同小区ID内的接收点)中的上行链路信号状况,接收点可以用于支持对移动站30的上行链路CoMP,并对不同移动站状态相应地做出决定。所作的具体决定取决于移动站30当前是否处于CoMP状态中。以此方式,如果移动站30已经处于上行链路CoMP操作状态中,基站32就确定(块114)是否改变用于移动站30的接收点集。如果移动站30处于非上行链路CoMP状态中,基站32就同样按照块114确定是否借助RP集信息将移动站30的状态从非CoMP状态改变为CoMP状态。为了做出决定114,基站32可以连续监控接收点信号状况112,并如上阐述地做出决定。
假定基站32确定(块114)由移动站使用的PUCCH的功率电平将要改变,基站32就将上行链路CoMP配置信息传送(块116)到移动站30。这个信息支持移动站的新上行链路CoMP操作状态,并且取决于特定实现方式,包括诸如用于支持控制信道的等式1的ΔF_PUCCH(F)参数值和可能的一个或多个参数之类的参数。
当移动站30接收指示用于支持在期望的功率电平的上行链路CoMP操作的信息的消息时,移动站30按照等式1应用(块122)上行链路发射功率以便通过使用在上述IE中的参数值来代替所有原始小区特定信道功率控制参数。
在应用了针对新上行链路CoMP操作状态的功率电平后,按照块122,移动站30使用用于上行链路传输的新功率电平来通过PUCCH继续通信。
注意,在上述的情形中,变化发生在上行链路CoMP状况改变的背景中。但根据进一步的实现方式,基站32可以出于任何原因改变ΔF_PUCCH(F)参数的值。
根据一些实现方式,基站32可以以接收点(RP)集特定的方式来调节用于PUCCH的功率电平,即基于由使用PUCCH的移动站30共同共享的RP集配置调节一组PUCCH的功率电平。在这点上,根据一些实现方式,对于RP集特定控制,可以如下定义相应的IE:
可以将RP集特定IE广播到与基站32通信的所有移动站30。在这点上,可以在SIB中的DeltaFList-PUCCH-RpSet-Common IE中广播参数,以下说明DeltaFList-PUCCH-RpSet-Common IE:
接收RP集特定IE的每一个移动站30储存用于不同接收点集的参数列表,以使得当基站32改变用于给定移动站30的接收点集时,移动站30取回适当的ΔF_PUCCH(F)值,其由接收点标识索引,并做出相应的PUCCH功率电平改变。
更具体地,参考图4,根据某些实现方式,用以基于RP集特定方式来调节PUCCH功率电平的技术180包括(在给定移动站30中和其他移动站30中)从基站32接收(块182)标识功率控制参数的广播消息,功率控制参数按照潜在的接收点集配置来索引。按照块184,在给定移动站30中存储这些控制参数。随后按照块186,基于当前接收点集配置,在移动站30中选择性地应用功率控制参数。按照块188,给定移动站30随后可以基于这些功率控制参数的选择性应用来调节其上行链路控制信道的功率。
作为更具体的示例,图5示出了在移动站30与基站32之间的示例性信号流200,其示出了结合RP集特定PUCCH功率电平调节技术180进行的通信。按照信号流200,移动站30接收(210)广播,其包含用于不同RP集的ΔF_PUCCH(F)参数的值。移动站30存储这些参数,按照接收点标识(用于不同集合)来索引。移动站30相关于当前CoMP配置与基站32通信(214)。基于这个配置和接收点信号状况(块224),基站32确定(块220)是否改变用于给定移动站30的RP集。
假定做出改变,基站32向移动站30传送(230)新的上行链路CoMP配置,包括新接收点集标识,标识用于移动站30的新接收点配置。响应于这个新RP集配置,移动站30基于接收点集标识应用(块234)新上行链路CoMP配置和新PUCCH功率控制参数。移动站30此后在通过其PUCCH的通信(238)中使用新功率电平。
参考图6,根据示例性实现方式,移动站30通常可以包括一个或多个天线300(图6中示出了一个天线300)和无线收发机310,用于通过无线通信***10(例如参见图1)发送和接收信号。通常,移动站30可以是基于处理器的机器,其包括一个或多个处理器320(微处理器、微控制器、处理核心等等),其执行存储在非暂时性存储器325中的指令330。指令330在由处理器320执行时使得处理器320执行本文公开的技术的一个或多个部分,例如技术50(图2)和/或技术180(图4)。因而,通常,如本文公开的,指令330在由处理器320执行时使得处理器320基于移动站特定的或接收点特定的方案,调节由给定移动站30使用的相关功率上行链路控制信道的功率电平。取决于特定实现方式,存储器325可以由半导体器件、光学器件、磁性器件、电阻器件、相变器件等等构成。
进一步的实现方式可以包括以下的一个或多个。
在一个示例性实现方式中,一种技术包括:在作为协作多点接收发送/接收(CoMP)***的部分的移动站中从基站接收消息,其标识参数以控制由移动站使用的上行链路控制信道的功率电平。由基站为移动站特别确定参数。技术包括在移动站中应用参数,使用应用的参数来调节由移动站在上行链路控制信道上的通信中的功率。
在一些实现方式中,参数包括deltaf-PUCCH参数。
在一些实现方式中,接收消息包括从基站接收单播消息。
在一些实现方式中,消息标识至少一个其他参数,所述至少一个其他参数不是由基站为移动站特别确定的,应用参数包括至少部分地基于所述至少一个其他参数和由基站针对移动站特别确定的参数,确定上行链路通信功率。
在一些实现方式中,接收消息包括接收***信息块消息。
在一些实现方式中,消息进一步标识移动站的接收点集配置中的变化,技术进一步包括响应于消息改变移动站中的接收点集配置。
在一个示例性实现方式中,一种技术包括在是协作多点接收发送/接收(CoMP)***的部分的移动站中从基站接收消息,其标识按照多个接收点集配置索引的功率控制参数。技术包括至少部分基于由移动站使用的接收点集配置选择性地应用功率控制参数,并响应于功率控制参数的选择性应用,调节移动站通过上行链路控制信道的通信中的功率。
在一些实现方式中,选择性地应用功率控制参数包括选择对应于移动站使用的接收点集配置的功率控制参数。
在一些实现方式中,接收消息包括接收广播消息,其中,所述广播消息由至少一个其他移动站接收。
在一些实现方式中,技术进一步包括在移动站中存储功率控制参数。
在一些实现方式中,技术进一步包括在移动站中接收另一个消息,其包括标识符,标识用于移动站的接收点集配置,其中,选择性地应用功率控制参数包括应用标识符以选择一个功率控制参数。
在一些实现方式中,选择性地应用功率配置参数包括选择一个功率配置参数,并组合选择的功率配置参数以针对移动站确定上行链路功率。
在一个示例性实现方式中,移动站包括无线收发器和处理器,用以执行任意上述的技术。
在一个示例性实现方式中,用以存储多个指令的至少一个机器可读介质,在由计算设备执行指令时使得计算设备执行任意上述的技术。
尽管本文公开了有限数量的示例,但得益于本公开内容的本领域技术人员会由此会意识到许多变型和变化。意图是使得所附权利要求覆盖所有这样的变型和变化。
Claims (15)
1.一种方法,包括:
在作为协作多点接收发送/接收(CoMP)***的部分的移动站中接收来自基站的消息,所述消息标识参数以控制由所述移动站使用的上行链路控制信道的功率电平,所述参数由所述基站针对所述移动站来特别确定;
在所述移动站中应用所述参数;以及
使用所应用的参数来调节由所述移动站在所述上行链路控制信道上的通信中的功率。
2.根据权利要求1所述的方法,其中,所述参数包括deltaf-PUCCH参数。
3.根据权利要求1所述的方法,其中,接收所述消息包括:从所述基站接收单播消息。
4.根据权利要求1所述的方法,其中,所述消息标识没有由所述基站针对所述移动站而特别确定的至少一个其他参数,并且应用所述参数包括:至少部分地基于所述至少一个其他参数以及由所述基站针对所述移动站特别确定的所述参数来确定上行链路通信功率。
5.根据权利要求1所述的方法,其中,所述接收包括接收***信息块消息。
6.根据权利要求1所述的方法,其中,所述消息进一步标识所述移动站的接收点集配置中的变化,所述方法进一步包括响应于所述消息而改变所述移动站中的所述接收点集配置。
7.一种方法,包括:
在作为协作多点接收发送/接收(CoMP)***的部分的移动站中接收来自基站的消息,所述消息标识根据多个接收点集配置来进行索引的功率控制参数;
至少部分基于由所述移动站使用的接收点集配置来选择性地应用所述功率控制参数;及
响应于所述功率控制参数的选择性应用来调节由所述移动站在所述上行链路控制信道上的通信中的功率。
8.根据权利要求7所述的方法,其中,选择性地应用所述功率控制参数包括:选择与由所述移动站使用的所述接收点集配置相对应的功率控制参数。
9.根据权利要求7所述的方法,其中,所述参数包括deltaf-PUCCH参数。
10.根据权利要求7所述的方法,其中,接收所述消息包括接收广播消息,所述广播消息由至少一个其他移动站接收。
11.根据权利要求7所述的方法,其中,所述接收包括接收***信息块消息。
12.根据权利要求7所述的方法,进一步包括在所述移动站中储存所述功率控制参数。
13.根据权利要求7所述的方法,进一步包括在所述移动站中接收另一个消息,所述另一个消息包括标识所述移动站的接收点集配置的标识符,其中,选择性地应用所述功率控制参数包括应用所述标识符以选择所述功率控制参数中的一个。
14.根据权利要求7所述的方法,其中,选择性地应用所述功率配置参数包括选择所述功率配置参数中的一个,以及将所选择的功率配置参数与至少一个其他功率配置参数组合以针对所述移动站确定上行链路功率。
14.一种移动站,包括无线收发器和处理器,所述无线收发器和处理器用于执行根据权利要求1-13所述的方法中的任意方法。
15.至少一种机器可读介质,所述至少一种机器可读介质包括多个指令,在由计算设备执行所述指令时使得所述计算设备执行根据权利要求1-13所述的方法中的任意方法。
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CN102150460A (zh) * | 2008-09-15 | 2011-08-10 | 英飞凌科技股份有限公司 | 用于控制上行链路信号发射功率的方法和通信装置 |
WO2010150807A1 (ja) * | 2009-06-23 | 2010-12-29 | 株式会社エヌ・ティ・ティ・ドコモ | 無線基地局装置、移動端末装置及び送信電力制御方法 |
WO2011078631A2 (ko) * | 2009-12-27 | 2011-06-30 | 엘지전자 주식회사 | 다중 반송파 지원 무선 통신 시스템에서 상향링크 전송 전력 제어 방법 및 장치 |
WO2011082744A2 (en) * | 2010-01-11 | 2011-07-14 | Panasonic Corporation | Transmit power control signaling for communication systems using carrier aggregation |
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