CN103385028B - 用于配置蜂窝通信网络的协作区域内的功率分布的方法、设备和*** - Google Patents
用于配置蜂窝通信网络的协作区域内的功率分布的方法、设备和*** Download PDFInfo
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- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
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- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
- H04W52/283—Power depending on the position of the mobile
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Abstract
提供一种用于配置蜂窝网络***(100)内的功率分布的方法。蜂窝网络***包括至少一个协作区域(110)。至少一个协作区域由至少两个基站(101)定义,每个基站包括至少一个天线,其中每个基站具有至少一个波束(205,206)。该方法包括:配置基站以第一发射功率电平进行发射,以用于为在协作区域的中心地区(102)的用户设备提供第一接收功率电平;以及配置基站以第二发射功率电平进行发射,以用于在协作区域的边界地区(103)提供第二接收功率电平,其中第二接收功率电平低于第一接收功率电平。
Description
技术领域
本发明涉及蜂窝通信网络领域并且具体地涉及在协作区域中组织的蜂窝通信网络。
背景技术
经常在小区结构中组织现代无线通信网络。在LTE(3GPP长期演进)中,可以在所谓的协作区域中组织小区。协作区域可以由服务于一个或者多个小区的一个或者多个基站(e节点B、eNB)定义。在邻近协作区域之间,干扰尤其在协作区域(CA)的边缘地区中出现。
干扰低限降低成为研究问题由来已久,该问题产生许多提议、比如小区间干扰消除(ICIC)、增加的天线倾斜、SON优化算法、调度、协调波束成形等。全网络范围协作将完全克服干扰低限、但是实际不可行。
鉴于以上描述的情形,存在对于如下改进的技术的需要,该技术实现提供基本上避免或者至少降低上述问题中的一个或者多个问题的蜂窝通信***。
发明内容
根据独立权利要求的主题内容可以满足这一需求。从属权利要求描述这里公开的主题内容的有利实施例。
根据这里公开的主题内容的第一方面,提供一种用于配置蜂窝网络***内的功率分布的方法,蜂窝网络***包括至少一个协作区域,其中至少一个协作区域由至少两个基站定义,每个基站包括至少一个天线,其中每个基站具有至少一个波束或者多个波束,该方法包括:配置基站以第一发射功率电平进行发射以用于为在协作区域的中心地区的用户设备提供第一接收功率电平,并且配置基站以第二发射功率电平进行发射以用于在协作区域的边界地区提供第二接收功率电平,其中第二接收功率电平低于第一接收功率电平。
本发明的这一方面基于如下思想:通过适当配置蜂窝网络内的协作区域的功率分布可以改进干扰低限降低。
基站可以包括一个或者多个天线以及一个或者多个波束。波束可以是例如与广播信号对应的射线发射。基站或者基站的天线可以提供波束的具体特性。
例如在一个实施例中,基站或者eNodeB可以服务于多于一个小区。例如基站可以每个小区使用四个天线单元。
根据这里公开的主题内容的这一方面,可以用“龟”的形式提供蜂窝网络内的功率分布。名称“龟”概念可以用于指示协作区域(CA)的功率分布具有龟的形状、即用于在CA的中心的被服务用户的接收功率(Rx功率)尽可能高,而进入CA以外的其它区域中的干扰功率尽可能多地受阻。可以向协作区域中调度如下用户设备,这些用户设备在这一协作区域内具有它们的最强干扰者。适配协作区域的功率电平使得干扰在协作区域以外很快降低。
根据一个实施例,用户设备可以例如是移动电话或者计算机。
术语“中心地区”可以表示协作区域的如下部分,该部分被布置于两个基站之间并且代表协作区域的中心区域。术语“边界地区”可以表示协作区域的如下区域,该区域是协作区域的边缘。
根据一个实施例,该方法还包括配置每个基站以使得:以第一发射功率电平发射朝向中心地区的波束并且以第二发射功率电平发射朝向边界地区的波束,其中第二发射功率电平低于第一发射功率电平。
这一思想基于所谓的波束成形。波束成形是用于定向信号发射或者接收的信号处理技术。通过使用自适应或者固定接收/发射波束图案来实现这一空间选择性。可以适配波束的形式以及功率电平,以朝着协作区域的中心地区提供更多功率而朝着协作区域的边界地区提供更少功率,以便降低在协作区域的边缘的干扰。
波束成形可以利用干扰以改变波束的方向性。在发射时,波束成形器控制在每个发射器的信号的相位和相对幅度以便在波前中创建建设和破坏干扰图案。
根据又一实施例,第一发射功率电平在范围36dBm至44dBm中,并且第二发射功率电平在范围30dBm至35dBm中。
这意味着波束的发射功率电平朝着中心地区更高而朝着边界地区更低。第一发射功率电平可以近似为40dBm,并且第二发射功率电平可以近似为34dBm。
根据又一实施例,该方法还包括配置每个基站以使得:朝向中心地区的波束被下倾第一倾角并且朝向边界地区的波束被下倾第二倾角,其中第二倾角大于第一倾角。
可以相对于竖轴定义倾角。通过调整倾角。可以影响天线的发射特性以便朝着中心地区提供更高功率电平而朝着边界地区提供更少功率电平。
根据又一实施例,第二倾角可以按照至少倍率1.5大于第一倾角大。
例如第一倾角可以是10°而第二倾角可以是15°。可以相对于例如由应基站定义的竖轴定义倾角。
根据又一实施例,该方法还包括配置基站以根据协调多点传输来操作。
所谓的联合预编码协调多点传输(JP CoMP)可能需要将网络分离成合理大小的所谓的协作区域(CA)。尽管可以消除CA内的干扰,但是在CA之间,CA间干扰可能容易扰乱潜在性能增益中的多数潜在性能增益。
可以使这一话题甚至更复杂,因为将必须以用户为中心来设置CA,这包括用于UE的例如三个最强干扰小区。通常在非视线(NLOS)条件中,将仅有很小数目的用户看见相同最强小区集合,从而导致获得形式协作的UE的很小渗透率。
利用部分CoMP概念,可以实现显著进步为由相应***级(SL)仿真示范。它基本上组合成方法、即(i)将CA增加至例如3个站点而每站点3个小区使得CA的总大小为9。通过仅为9个小区之中的例如3个最强小区报告信道状态信息(CSI),可以同时实现低反馈开销和高渗透率。(ii)通过将可用资源、比如频率子频带划分成6个子频带来显著降低CA间干扰。在每个子频带中设置不同CA。这允许仅通过向CA的最佳相称子频带/设置中调度UE来调度几乎所有UE作为CA中心UE。
根据又一实施例,该方法还包括配置每个基站以在具体频率子频带操作专用于协作区域的至少一个天线,并且以在与具体频率子频带不同的至少一个频率子频带操作专用于其它协作区域的至少一个天线。
通过将可用频率频带划分成子频带,可以在邻近CA使用不同频率子频带时进一步降低在邻近CA之间的干扰。
根据又一实施例,该方法还包括配置每个基站在具体时隙操作专用于协作区域的至少一个天线并且在与具体时隙不同的时隙操作专用于其它协作区域的至少一个天线。
在这一实施例中,可以配置基站使得对于不同CA,不同时隙可以用于传输。这也可以降低在邻近CA之间的干扰。
根据又一实施例,该方法还包括测量协作区域和至少又一个协作区域的接收功率电平。
用户设备可能必须针对不同部分CoMP区域——这意味着例如针对不同频率子频带和/或时隙分配——完成参考信号接收功率(RSRP)测量。因此取代在任何时隙的一个常规宽带测量,现在可以仅需完成用于六个不同的部分CoMP区域的六个不同测量,以找出最佳相称部分CoMP区域、即频率子频带/时隙。
根据又一实施例,每频率子频带和/或时隙执行测量接收功率电平。
第一广播或者具体CoMP多播/单播消息可以包括如下信息,即完全不使用具有不同天线倾斜、Tx功率、每子频带波束成形或者用于不同时隙的龟概念。更一般而言,消息可以包括用于进行按子频带而不是宽带的RSRP测量的信息或者指令,而无与龟概念的直接关系。
根据又一实施例,该方法还包括发射信息消息以向用户设备通知通过使用无线电资源管理算法的子频带和/或时隙分配。
可能必须在网络的大区域内预定义频率子频带或者时隙或者可以代之以通过自优化网络(SON)算法来设置或者优化频率子频带或者时隙。在用于设置子频带的无线电资源管理(RRM)算法的情况下,可能需要消息以向用户设备通知子频带/时隙分配。
可以通过不是每小区而是每部分CoMP区域——包括CA的所有小区和波束——将参考信号应用于RSRP测量来执行进一步优化。例如六个子帧或者时隙中的每个子帧或者时隙然后可以将相同RS与波束成形、Tx功率分配和天线倾斜一起用于CA的所有小区。一个选项将是将来自LTE Rel 10的CSI RS用于这一目的。
根据这里公开的主题内容的第二方面,提供一种用于蜂窝网络***的基站该蜂窝网络***包括至少一个协作区域,其中至少一个协作区域由基站和至少又一个基站定义,基站包括至少一个天线,其中基站具有至少一个波束或者多个波束,基站适于被配置用于以第一发射功率电平进行发射,以用于为在协作区域的中心地区的用户设备提供第一接收功率电平,并且基站还适于被配置用于以第二发射功率电平进行发射以用于在协作区域的边界地区提供第二接收功率电平,其中第二接收功率电平低于第一接收功率电平。
基站可以是能够提供向电信网络的无线接入的任何类型的接入点或者附着点。由此,可以针对用户设备或者针对能够以无线方式通信的任何其它网元提供无线接入。
基站可以包括接收单元、例如如本领域已知的接收器。基站也可以包括发射器。可以实施接收器和发射器为一个单个单元、例如为收发器。收发器或者接收单元和发射器可以适于经由天线与又一基站或者用户设备通信。
基站可以与任何种类的控制单元或者***关联以被配置用于以第一发射功率电平进行发射以用于为在协作区域的中心地区的用户设备提供第一接收功率电平,并且被配置用于以第二发射功率电平进行发射以用于在协作区域的边界地区提供第二接收功率电平,其中第二接收功率电平低于第一接收功率电平。基站可以包括一个或者多个天线以及一个或者多个波束。波束可以是与例如广播信号对应的射线发射。基站或者基站的天线可以提供具体波束特性。
根据这里公开的主题内容的第三方面,提供一种用于通过控制如以上描述的方法来配置至少两个如以上描述的基站的控制单元。
控制单元可以是能够如控制如以上描述的方法的任何种类的控制单元。控制单元可以是处理器或者任何其它功能单元。控制单元可以定位于一个基站内或者布置于蜂窝网络***的在更高电平的任何其它部分中。控制单元可以与协作区域的每个基站关联或者可以与多于一个协作区域的基站关联。
在又一实施例中,控制单元与运营和维护***关联。
在移动网络中,运营和维护中心可以是用于运营和维护网络的中心位置。控制单元可以与这样的中心关联。
根据这里公开的主题内容的第四方面,提供一种蜂窝网络***,该蜂窝网络***用于配置该蜂窝网络***内的功能分布,该蜂窝网络***包括至少两个如以上描述的基站。
蜂窝网络***还可以包括如以上描述的控制单元。可以在网络***的任何控制***中、例如在运营和维护***中布置控制单元。
这里一般而言,根据第一方面的方法和方法的实施例可以包括执行关于第二、第三或者第四方面或者其实施例描述的一个或者多个功能。反之亦然,根据第二、第三或者第四方面的基站、控制单元或者蜂窝网络***及其实施例可以包括用于执行关于第一方面或者其实施例描述的一个或者多个功能的单元或者设备。
根据这里公开的主题内容的第五方面,提供一种用于配置功率分布的计算机程序,该计算机程序适于在由数据处理器组件执行时控制如在第一方面或者其实施例中阐述的方法。
如这里所用,引用计算机程序的旨在于等效于引用包含如下指令的程序单元和/或计算机可读介质,这些指令用于控制计算机***以协调以上描述的方法的执行。
可以通过使用任何适当编程语言、如例如JAVA、C++来实施计算机程序为计算机可读指令代码,并且可以在计算机可读介质(可移除盘、易失性或者非易失性存储器、嵌入式存储器/处理器等)上存储计算机程序。指令代码可操作用于对计算机或者任何其它可编程设备编程以执行既定功能。计算机程序可以从如下网络、比如万维网可用,可以从该网络下载它。
可以分别借助计算机程序和软件实现这里公开的主题内容。然而也可以分别借助一个或者多个具体电子电路和硬件实现这里公开的主题内容。另外也可以用混合形式、即在软件模块与硬件模块的组合中实现这里公开的主题内容。
在上文已经描述并且在下文中将描述这里参照蜂窝网络***、基站和配置功率分布的方法而公开的主题内容的示例实施例。必须指出,与这里公开的主题内容的不同方面有关的特征的任何组合当然也有可能。具体而言,已经参照装置型实施例描述一些实施例,而已经参照方法型实施例描述其它实施例。然而本领域技术人员将从以上和以下描述中推断,除非另有通知,除了属于一个方面的特征的任何组合之外,在与不同方面或者实施例有关的特征之间、例如甚至在装置型实施例的特征与方法型实施例的特征之间的任何组合也视为由用本申请公开。
从下文将描述的示例清楚并且参照附图说明以上定义的方面和实施例以及本发明的更多方面和实施例,但是本发明不限于这些方面和实施例。
附图说明
图1示出根据这里公开的主题内容的实施例的具有两个基站的蜂窝通信网络的协作区域。
图2示出根据这里公开的主题内容的实施例的具有三个基站的蜂窝通信网络的协作区域。
图3示出根据这里公开的主题内容的实施例的基站的天线的取向。
图4示出根据这里公开的主题内容的实施例的在某一距离布置三个协作区域。
图5示出根据这里公开的主题内容的实施例的使用不同频率子频带的图4的协作区域。
图6示出使用ICIC的常规蜂窝网络。
具体实施方式
附图中的图示是示意性的。注意在不同图中,相似或者相同单元具有相同标号或者与对应标号仅第一位不同的标号。
在下文中,参照附图并且参照当前标准、比如LTE的方面举例说明这里公开的主题内容的实施例。然而这样引用当前标准仅为示例而不应视为限制权利要求的范围。
这里描述的主题内容的实施例落在移动无线电***概念、比如LTE、LTE-A及其演进的领域中。这样的***可以应对联合预编码协调多点(JP-CoMP)传输的情况。已经有用于LTE Rel 10的CoMP研究项目(SI),但是并无清楚结论,仅针对很复杂的***设置而发现明显***级增益。新CoMP SI已经刚开始发现一种为实际移动无线电***利用理论上熟知的性能增益的更佳方式。
在下文中描述的实施例将部分CoMP概念进一步演变成所谓的‘龟’概念,其中名称龟应当指示协作区域(CA)的功率分布具有龟的形状、即用于在CA的中心的被服务用户的Rx功率尽可能高,而进入CA以外的其它区域中的干扰功率尽可能多地受阻。
本发明的目的是提供用于使CA的传输功率局限于想要的用户并且降低进入CA以外的区域中的干扰的技术。
对于JP CoMP,一个主要挑战是需要将网络分离成合理大小的所谓的协作区域(CA)。尽管可以消除CA内的干扰,但是在CA之间,CA间干扰可能容易扰乱潜在性能增益中的多数潜在性能增益。
使这一话题甚至更复杂,因为将必须以用户为中心来设置CA,这包括用于UE的例如3个最强干扰小区。通常在NLOS条件中,将仅有很小数目的用户看见相同最强小区集合,从而导致获得形式协作的UE的很小渗透率。
利用部分CoMP概念,可以实现显著进步为由相应***级(SL)仿真示范。它基本上组合成方法、即:
(a)将CA增加至例如3个站点、每站点3个小区使得CA的总大小为9。通过仅为9个小区之中的例如3个最强小区报告信道状态信息(CSI),可以同时实现低反馈开销和高渗透率。
(b)通过将可用资源、比如频率子频带划分成6个子频带来显著降低CA间干扰。在每个子频带中设置不同CA。这允许仅通过向CA的最佳相称子频带中调度UE来调度几乎所有UE作为CA中心UE。
这一概念作用良好。同时尤其对于在CA或者小区边缘附近的UE仍然存在有限制进一步性能增益的某些显著干扰低限。对于这些UE,Rx功率将是小的,这是由于与eNB发射器的长的距离以及由此带来的高的路径损耗。同时,来自其它小区的干扰低限在CA的整个小区区域内相对恒定或者在小区边界甚至更高,因为干扰发射器具有相对更短距离。
若无强干扰低限,最高性能增益将用于小区边缘用户。以两个小区和LOS条件作为简单示例。用于在小区边缘的UE的SIR将确切为0dB,并且在协作和IF消除之后,它仅受噪声低限限制、例如可能高达20dB。
这里描述的主题内容的实施例的目的因此是尽可能多地降低CA间干扰低限、理想地降低至例如在20dB以下的值(相对于用于CA中心的被服务UE的Rx功率)。在该情况下,可以用LTE的最高调制和编码方案、例如需要约17dB SINR的64QAM5/6服务于所有UE。
在图1中示出蜂窝网络***100的一个实施例。网络***包括一个或者多个协作区域,其中示出一个协作区域110。协作区域由至少两个基站101定义。每个基站包括至少一个天线(未示出),并且每个基站具有多个波束(未示出)。基站被配置用于以第一发射功率电平进行发射以用于为在协作区域的中心地区102的用户设备(未示出)提供第一接收功率电平。基站还被配置用于以第二发射功率电平进行发射以用于为在协作区域的边界地区103提供第二接收功率电平。第二接收功率电平低于第一接收功率电平用于降低边界地区中的干扰并且用于提供功率分布的龟形状。干扰低限的具体成形旨在于尽可能多地避免CA间干扰。可以向协作区域中调度如下用户设备,这些用户设备在这一协作区域内具有它们的最强干扰者。协作区域的功率电平被适配使得干扰在协作区域以外很快降低。
干扰低限降低成为研究问题由来已久,该问题产生许多提议、比如小区间干扰消除(ICIC)、增加的天线倾斜、SON优化算法、调度、协调波束成形等。全网络范围协作将完全克服干扰低限,但是实际不可行。
从用于LTE Rel 10的第一CoMP研究项目的结果清楚,尚无实用、强大可行的、实际地显著降低干扰低限的解决方案可用。
根据实施例,部分CoMP概念可以与具体干扰成形技术组合。干扰成形的目的是在CA的中心尽可能多地集中CA的所有eNB的Tx功率,而在CA的边界,干扰功率应当尽可能快地降低,使得产生用于整个CA的Rx功率的龟状形状。
有用于对干扰成形的三个示例手段、即:
-参与CA的每小区的宽带波束成形
-每波束的Tx功率适配
-天线倾斜
图2示出包括如下CA的蜂窝网络***200的示例,该CA由各自有3个小区/扇区的3个站点构成。在例如每小区4个天线单元的假设之下,已经在下文中假设约33度的波束宽度。这允许具有每120°扇区2个波束,这常规地由单个60°-70°水平波束提供。在示出基站101的天线单元的图3中示出这样的配置。
图2的CA包括在三角形207中布置三个基站101。图2中的朝向CA的中心地区102的灰色波束205使用例如40dBm的高Tx功率加上例如10°的适度下倾,而未填充的小波束206指示例如34dBm的降低的Tx功率加上例如15°的强下倾。这一组合可以保证用于CA的中心地区102的良好覆盖和用于CA的边界地区103的干扰功率的快速下降,即生成Rx功率的既定龟状形状。用于由3个站点和9个小区、各自为33°的2个波束构成的协作区域(CA)的龟概念生成在CA的中心的0dB高Rx功率区域102和进入其它CA(-20dB线)103中的干扰的骤降。
在CA边界的低功率意味着将用很差覆盖来服务于在该区域中的UE。出于该原因,该概念可以与部分CoMP概念组合。这里的重要方面是将频率频带划分成子频带,并且对于每个子频带,一个站点如图5中的蜂窝网络***的三角形的不同线所示参与不同CA。作为结果,可以仅通过选择恰当频率子频带来将几乎所有UE充当为CA中心UE。此外,在子频带内CA中心(具有相同线的三角形)被分离某一距离,即相互不相邻,这如同针对常规蜂窝无线电***的小区的情况。组合所有子频带——即所有三角形——可以保证所有UE充当作为CA中一个CA的中心UE。对于一个子频带(具有相同线的三角形),保证在CA中心之间的最小距离(右)使得CA间干扰在例如20dB以下的概率高。
图4的蜂窝网络***指示例如对于500m的站点间距离(实线)将有虚线指示的约500m CA间距离,即CA间干扰理想地应该在这500m之内降低到预定干扰低限水平。
已经针对随机选择的位置为慕尼黑市区用上述波束功率和倾斜参数执行射线追踪仿真而未进一步优化发射器位置(Tx高度为25m)。针对所有3个站点和每站点所有6个波束的组合的用于接收功率的射线追踪结果已经表明,甚至在无长期优化过程的情况下,龟概念可以——如既定的那样——将Tx功率局限到CA的具有很好覆盖的中心区域中,并且已经在更远500m之后Rx功率已经下降多于20dB。
不能避免——或者至少不能如此容易地避免用于长街道的熟知波导效应。这一更长到达干扰将限于相对小的区域。此外,干扰抑制组合(IRC)接收器将理想地消除这些干扰者。
图6上次使用ICIC的常规蜂窝网络600。主要不同是以小区中心区域为代价增加用于小区边缘区域603的Rx功率。在中心地区中降低Rx功率。这对于小区中心UE造成无小区间IF降低和性能损失。
关于这里公开的主题内容,应当提到,虽然一些实施例引用“基站”、“eNB”等,但是应当理解,这些引用中的每个引用视为隐含地公开相应引用一般术语“网络部件”或者在更多其它实施例中引用术语“网络接入节点”。涉及具体标准或者具体通信技术的其它术语也视为隐含地公开具有希望的功能的相应一般术语。
还应当注意,如这里公开的基站不限于如在一些实施例中描述的专用实体。实际上,可以用各种方式在通信网络中的各种位置实施这里公开的主题内容而又仍然提供希望的功能。
根据本发明的实施例,至少部分以相应计算机程序的形式提供这里公开的任何适当实体(例如部件、单元和设备),例如控制单元,这些计算机程序使处理器能够提供如这里公开的相应实体的功能。根据其它实施例,可以在硬件中提供这里公开的任何适当实体。根据其它——混合——实施例,可以在软件中提供一些实体而在硬件中提供其它实体。
应当注意,这里公开的任何实体(例如部件、单元和设备)不限于如在一些实施例中描述的专用实体。实际上,可以用各种方式并且用各种粒度在设备级实施这里公开的主题内容而又仍然提供希望的功能。另外,应当注意,根据实施例,可以针对这里公开的功能中的每个功能提供单独实体(例如软件模块、硬件模块或者混合模块)。根据其它实施例,配置实体(例如软件模块、硬件模块或者混合模块(组合的软件/硬件模块))用于提供如这里公开的两个或者更多功能。根据一个实施例,控制器包括处理器设备,该处理器设备包括用于执行与相应软件模块对应的至少一个计算机程序的至少一个处理器。
应当注意,术语“包括”未排除其它单元或者步骤,而“一个”未排除多个。也可以组合与不同实施例关联描述的单元。也应当注意,不应解释权利要求中的标号为限制权利要求的范围。
为了概括这里公开的主题内容的以上描述的实施例,可以陈述:
龟概念的益处是大量降低用于每个频率子频带内的CA间干扰的干扰低限,这导致用于干扰有限场景、比如具有500m ISD的大城市的显著更高***容量。出于这一目的,使用每频率子频带(或者每时隙)的CA的不同设置,可以根据这里描述的主题内容的实施例优化用于CA而不是每小区的天线倾斜、每波束的Tx功率和波束方向,并且可以组合它们与部分CoMP概念。
与常规天线倾斜比较,优化在这里是针对包括CA的小区集合。新颖的是站点——因此一个站点的多个小区——可以同时属于被不同资源、比如频率子频带或者时隙分离的不同CA。作为结果,站点的每个小区将需要不同Tx功率以及用于不同频率子频带或者时隙的不同天线倾斜。
用于实现这一点的一个选项是使用允许依赖于频率的天线倾斜(3D波束成形)的有源天线***或者使用时隙作为资源,其中为每个时隙可以生成不同天线倾斜。第二个更容易实现,因为仅需每时隙电子相移。作为最简单的备选方案,甚至可以考虑与天线选择算法组合的具有不同倾斜的若干天线单元。可以使用不那么强大、但是甚至更简化的方案,其中将仅为不同子频带适配Tx功率而又保持天线恒定。
标号列表
100 蜂窝网络***
101 基站
102 协作区域的中心地区
103 协作区域的边界地区
110 协作区域
200 协作区域
205 朝着中心地区发射的波束
206 朝着边界地区发射的波束
207 由基站定义的三角形
400 蜂窝网络***
500 蜂窝网络***
600 现有技术的蜂窝网络***
602 低功率地区
603 高功率地区
Claims (13)
1.一种用于配置蜂窝网络***(100)内的功率分布的方法,所述方法包括:
配置至少两个基站以第一发射功率电平进行发射,以用于为在至少一个协作区域的中心地区(102)的用户设备提供第一接收功率电平,
其中所述至少一个协作区域由所述至少两个基站(101)定义,所述至少一个协作区域是联合传输协调多点传输(CoMP)***的协作区域,每个基站包括至少一个天线,其中每个基站具有至少一个波束(205,206),以及
配置所述至少两个基站以第二发射功率电平进行发射,以用于在所述至少一个协作区域的边界地区(103)提供第二接收功率电平,
其中所述第二接收功率电平低于所述第一接收功率电平,并且其中协作区域内的所述第一发射功率电平和所述第二发射功率电平之间的功率分布形成干扰低限以避免协作区域之间的干扰。
2.如权利要求1所述的方法,所述方法还包括:
以这样的方式配置每个基站(101):
用第一发射功率电平发射朝向所述中心地区(102)的波束(205),以及
用第二发射功率电平发射朝向所述边界地区(103)的波束(206),
其中所述第二发射功率电平低于所述第一发射功率电平。
3.如任一前述权利要求所述的方法,所述方法还包括:
以这样的方式配置每个基站(101):
朝向所述中心地区的波束(205)被下倾第一倾角,以及
朝向所述边界地区的波束(206)被下倾第二倾角,
其中所述第二倾角大于所述第一倾角。
4.如权利要求1所述的方法,所述方法还包括:
配置所述基站(101)以根据协作的多点传输来操作,用于操作所述协作区域(110)和至少又一个协作区域。
5.如权利要求4所述的方法,所述方法还包括:
配置每个基站(101)
在具体频率子频带处操作专用于所述协作区域(110)的至少一个天线,以及
在与所述具体频率子频带不同的至少一个频率子频带处操作专用于其它协作区域的至少一个天线。
6.如权利要求4和5中的任一权利要求所述的方法,所述方法还包括:
配置每个基站(101)
在具体时隙操作专用于所述协作区域(110)的至少一个天线,以及
在与所述具体时隙不同的时隙操作专用于其它协作区域的至少一个天线。
7.如权利要求4所述的方法,所述方法还包括测量所述协作区域(110)和所述至少又一个协作区域的接收功率电平。
8.如权利要求7所述的方法,其中针对每频率子频带和/或时隙执行测量所述接收功率电平。
9.如权利要求4所述的方法,所述方法还包括:
发射信息消息以向用户设备通知通过使用无线电资源管理算法的子频带和/或时隙分配。
10.一种用于蜂窝网络***(100)的基站(101),
所述蜂窝网络***包括至少一个协作区域(110),
其中所述至少一个协作区域由所述基站和至少又一个基站(101)定义,所述至少一个协作区域是联合传输协调多点传输(CoMP)***的协作区域,
所述基站包括至少一个天线,其中所述基站具有至少一个波束(205,206),
所述基站适于被配置用于以第一发射功率电平进行发射,以用于为在所述至少一个协作区域的中心地区(102)的用户设备提供第一接收功率电平,以及
所述基站还适于被配置用于以第二发射功率电平进行发射,以用于在所述至少一个协作区域的边界地区(103)提供第二接收功率电平,
其中所述第二接收功率电平低于所述第一接收功率电平,并且其中协作区域内的所述第一发射功率电平和所述第二发射功率电平之间的功率分布形成干扰低限以避免协作区域之间的干扰。
11.一种控制单元,用于通过控制如根据权利要求1至9之一所述的方法来配置至少两个如权利要求10所述的基站(101)。
12.如权利要求11所述的控制单元,其中所述控制单元与运营和维护***关联。
13.一种蜂窝网络***(100),用于配置所述蜂窝网络***内的功率分布,所述蜂窝网络***包括至少两个如权利要求10所述的基站(101)。
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CN103385028A (zh) | 2013-11-06 |
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US20140057618A1 (en) | 2014-02-27 |
US9161318B2 (en) | 2015-10-13 |
WO2012113454A1 (en) | 2012-08-30 |
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