CN104170270A - 具有采用公共传输点身份的协作传输点的异构网络的背景下的干扰抑制 - Google Patents

具有采用公共传输点身份的协作传输点的异构网络的背景下的干扰抑制 Download PDF

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CN104170270A
CN104170270A CN201380013686.1A CN201380013686A CN104170270A CN 104170270 A CN104170270 A CN 104170270A CN 201380013686 A CN201380013686 A CN 201380013686A CN 104170270 A CN104170270 A CN 104170270A
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CN104170270B (zh
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A·达维多夫
G·莫罗佐夫
A·马尔采夫
V·谢尔盖耶夫
I·博洛京
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Intel Corp
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Intel Corp
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Abstract

讨论了一种用于将诸如小区间干扰协调(ICIC)和增强ICIC(eICIC)的基于频率和时间的方案扩展至具有公共传输点身份的传输点的无线广域网(WWAN)内的群集的干扰抑制的技术。可以在共享相同传输点身份的多个传输点当中配置与不同传输点特性相关的多个传输功率消息。可以采用所述多个传输功率消息协调来自相邻传输点的处于不同频率上的传输。此外，可以将新的参考信号组配置为与不同的传输点特性相关。可以采用这些新的相关参考信号使用于为一组传输点提供反馈的测量与具有相同传输点身份的另一组传输点所传输的参考信号解耦。

Description

具有采用公共传输点身份的协作传输点的异构网络的背景下的干扰抑制
背景技术
无线广域网(WWAN)标准内的带宽需求总是处于不断的增长当中。而且，诸如流视频的更多数据密集型服务和更高容量的本地化流量带来了跨越WWAN(包括在无线通信塔之间(或者塔)的边界附近)提高的服务的均匀性的需求。为了满足这些需求，靠得越来越近的无线通信塔正在对谱重复使用。
此外，WWAN已经变得支持塔的异构网络。这些异构网络在较为强大的塔的覆盖区域内采用功率相对较低的塔。功率相对较低的塔能够改善在高流量区域中和/或在相对较为强大的塔覆盖薄弱的区域中的覆盖的均匀性。它们还能够通过为相对较强的塔卸下一定的流量而提高带宽。
作为另一种提高服务均匀性的方案是能够将塔划分成协作的群集。能够使各个群集协作，从而允许多个塔从单个无线设备发送和接收传输。对来自多个传输点的接收和发送能力进行合并，能够改善无线移动设备的服务，尤其是在相邻塔的覆盖区域之间的边界处。
但是，这些提高带宽的方案中的每个也提高了WWAN的复杂性。这些涉及更近的频率重复使用、重叠覆盖区域和增加的传输的方案不仅提高了复杂性，而且还提高了干扰的可能性和其他问题。此外，对这样的提高的干扰可能性的解决方案变得局限于由提高的复杂性导致的狭窄的制约范围内。
附图说明
通过下述结合附图考虑的详细说明，本发明的特征和优点将变得显而易见，其中，附图一起通过举例的方式示出了本发明的特征；并且其中：
图1是示出了根据示例的无线局域网(WLAN)内的一对高功率传输点的方框图，其中，地理上邻近的传输点的频率重复使用和异构传输点的重叠覆盖区域创造了各种形式的干扰的可能性；
图2是示出了根据示例的能够用于抑制覆盖区域间干扰的正交频分复用(OFDM)调制方案内的物理资源块(PRB)的方框图；
图3是示出了根据示例的处于协作多点(CoMP)环境内的联合传输(JT)和/或动态点选择(DPS)的方框图；
图4是示出了根据示例的CoMP情形的示例的方框图，其中分布式传输点能够共享公共身份；
图5是示出了不能向相邻塔可靠地报告避免干扰传输机会的高和低功率传输点的共享传输功率消息的形成的方框图；
图6是说明根据一个示例采用多个传输功率消息向相邻塔可靠地报告避免干扰传输机会的方框图；
图7是示出了来自处于高和低功率传输点的妨碍信道信息的可靠测量的重合参考信号的方框图；
图8是说明根据一个示例采用与一个或多个传输点特性/属性相关的并且与空白模式对准的参考信号对，提供用于反馈的可靠测量的方框图；
图9是描绘了根据另一示例的用于相对于频率范围提供有关传输功率水平的传输点特定消息，以抑制跨越各个无线传输点群集的干扰的过程的流程图；
图10是示出了根据示例的，针对具有不同传输特性的类似标识传输点，在群集情形下用于减少干扰的设备的方框图；
图11是描绘了根据示例的用于在具有不同传输特性的类似标识传输点的群集内为传输点特定反馈的测量提供传输点特定参考信号的过程的流程图；
图12是示出了根据示例的用于抑制无线传输点群集情形下的反馈测量混淆的设备的方框图；以及
图13是根据另一示例的UE的方框图。
现在将参考所示出的示例性实施例，并且这里将采用特定语言对其加以描述。但是应当理解，其并非旨在由此对本发明的范围加以限制。
具体实施方式
在公开和描述本发明之前，应当理解本发明不限于文中公开的具体结构、处理步骤或材料，而是扩展至本领域普通技术人员可以认识到的其中的等价物。还应当理解，文中采用的术语的目的仅在于描述具体的实施例，而非旨在构成限制。
定义
在不同的规范中采用不同的针对无线移动设备的术语。文中采用的无线移动设备可以是用户设备(UE)或者移动站(MS)，连同其他可能性。贯穿本申请中，术语“无线移动设备”、“UE”、以及“MS”可以互换使用。
将文中采用的术语“蜂窝无线电塔”定义为被配置为与位于被称为小区的地理区域内的多个无线移动设备通信的在无线广域网(WWAN)中无线通信设备。在不同的规范中采用不同的针对蜂窝无线电塔的术语。用于蜂窝无线电塔的不同变型的术语可以包括但不限于：基站(BS)、演进节点B(eNodeB或eNB)、WWAN传输点、传输点、以及WWAN节点。所述术语除非另行说明可互换使用。BS或eNodeB的实际定义被提供在其电气与电子工程师协会(IEEE)802.16和第三代合作伙伴项目(3GPP)规范中。
文中采用的术语“基本上”是指动作、特性、性质、状态、结构、项、或结果的完全或近乎完全的程度或度。例如，物体“基本上”被包围将是指物体要么被完全包围，要么被近乎完全包围。与绝对完全的确切的容许偏差度在一些情况下取决于特定的背景。但是，一般而言，接近完全要为了获得相同的总体结果，就像获得了绝对和总体完全。“基本上”的使用同样适用于当在用于指完全或者近乎完全缺失动作、特性、性质、状态、结构、项、或结果的相反的含义时。
可能还在本说明书的主体的别处定义了其他术语。
示例实施例
下文提供了对技术实施例的初步概述，在后面然后进一步详细地描述特定的技术实施例。这一初步摘要的目的在于辅助读者更快地理解所述技术，但是其并非旨在标识所述技术的关键特征或基本特征，也并非旨在限制权利要求的主题的范围。
无线广域网(WWAN)能够涉及同构和异构网络，对于其内的不同种类的传输点而言存在重叠的和毗邻的覆盖区域，以提高谱效率。为了避免可能由这些重叠的和毗邻的覆盖区域导致的干扰问题，开发出了在不同频率上和在不同时间处对传输进行协调的方法。在3GPP的背景下，采用用于小区间干扰协调(ICIC)的标准以实现不同频率上的协调。相对于时间而言，采用用于增强ICIC(eICIC)的标准实现干扰协调，尤其是针对具有固定频率分配的通信资源。
但是，这些基于频率和时间的方法，例如，ICIC和eICIC，在传输点身份的基础上对传输进行协调。但是，一些异构网络情况使多个具有相同身份的传输点形成群集。诸如RRH的一些传输点的特性将这些传输点借出，以与它们所依赖的诸如eNodeB的另一传输点共享传输点身份。令人遗憾的是，在多个传输点共享相同的身份的情况下，基于传输点身份对频率和时间协调的旧有方法进行应用带来了混淆和问题。这些问题能够扩展至与传输的协调相关的辅助功能，例如，用于提供反馈信息的测量。
但是，诸如ICIC和eICIC的方法能够扩展至多个传输点共享相同的传输点身份的情形。可以采用不同的方法生成有关功率水平的消息，在所述功率水平处，对于不同的频率范围调度不同的传输点。这些消息可以基于传输点身份以外的特性或属性。这些特性/属性能够区别/鉴别共享公共的传输点身份的传输点。可以在相邻的传输点群集之间传达消息，从而通过非干扰方式协调不同频率上的传输。
就基于时间的传输协调而言，多个具有公共传输点身份的传输点可能对相关反馈测量是有问题。这些测量可以基于参考信号，所述参考信号基于传输点身份进行配置和分配。因此，多个传输点可能传输分配给相同资源的相同参考信号，从而导致混淆和不准确的测量。
为了解决这些不准确性，可以配置新的参考信号组，以与传输点身份之外的不同传输点特性/属性相关。可用采用这些新的相关的参考信号使来自具有相同传输点身份的不同传输点的参考信号解耦。然后，解耦的参考信号能够导致准确的测量，从而得到准确的反馈。下文讨论方法的额外细节，用于扩展频率和时间协调的旧有方法，到多传输点共享共同的传输点身份的情形。
图1示出了一对功率相对较高的传输点102、103的一对覆盖区域100、101，连同处于第一高功率传输点102的覆盖区域内的功率相对较低的传输点108的额外覆盖区域110。所述一对高功率传输点的邻近性能够导致覆盖区域间干扰118。类似地，异构传输点102、108的交叠覆盖区域100、110能够创造覆盖区域内干扰126的可能性。
第一高功率传输点102可以是基站(BS)和/或宏节点(MCN)演进节点(eNodeB)，第二高功率传输点103亦如此。文中采用的术语“高功率传输点”可以代替术语“MCN”，反之亦然。功率相对较低的传输点102可以是低功率节点(LPN)。文中采用的LPN可以是微小区、微微小区、毫微微小区、家庭eNodeB小区(HeNB)、远程无线电头(RRH)、远程无线电器件(RRE)、以及中继器之一。如本文使用，可以采用术语“LPN”或者任何上文枚举的变化代替术语“低功率传输点”，可以采用术语“低功率传输点”代替术语LPN。此外，作为本公开中讨论的实施例的一般性的重要声明，尽管贯穿本说明书中经常采用第三代合作伙伴项目(3GPP)长期演进(LTE)标准这一术语，但是其并非旨在构成限制，而且在本说明书的一些部分当中采用更一般的术语也有例外情况来进一步传达这一点。
第一覆盖区域100包括一组的三个不同的基本上为六边形的小区104a-c。文中采用的术语“小区”是传输点在其上能够与无线移动设备通信的地理区域。所述的三个小区是由来自高功率传输点102的三个传输方向106a-c得到的，在图1中采用三个箭头示出了其中心。第二高功率传输点/MCN103也具有由三个基本上为六边形的小区定义的覆盖区域101，所述三个小区是由三个不同的传输方向得到的，如图所示。
令人遗憾的是，处于第二覆盖区域101和第一覆盖区域100之间的边界处的可以是用户设备(UE)的第一无线移动设备112可能经受覆盖区域间干扰118。例如，可以将第一UE的计划下行链路(DL)传输114从第二MCN103传输至第一UE。但是，第一UE也会受到来自第一MCN102的泄漏DL传输116的照射。在图1描绘的情形下，这些泄漏DL传输可能导致覆盖区域间干扰118。
作为覆盖区域间干扰118的另一个示例，问题还会导致这样的情形，即在第二MCN103处接收的来自第一UE112的上行链路(UL)传输是连同来自第一MCN102的泄漏DL传输一起接收到的。此外，覆盖区域间干扰可能包括来自不只一个相邻eNodeB/传输点的干扰。在一些情况下，LPN也可能促使问题发生。
覆盖区域内干扰126也可能成为问题。可以将图1中描绘的WWAN描述为异构，因为其内的不同类型的传输点。在第一传输点102的覆盖区域100内，在第一小区104a中，LPN108创建了额外覆盖区域110。这一额外覆盖区域能够为高度集中的本地化流量提供更好的服务均匀性，和/或在第一小区104a内仅在薄弱地覆盖的边界处提供提高的均匀性。
但是，第一小区104a由额外覆盖区域110重叠可能导致各种形式的覆盖区域内干扰126。例如，额外覆盖区域110中的第二UE120能够向LPN108发送UL传输122。但是，这一UL传输可能受到来自第一MCN102的泄漏DL传输124的干扰。在替代示例中，泄漏DL传输可能干扰从LPN到第二UE的DL传输。来自额外传输点的干扰也可能加入到问题当中。
图1所示的空间邻近性和重叠、用于提高带宽和覆盖均匀性的技术的必然结果都促成干扰的可能性。但是它们不是判定是否会发生干扰的仅有因素。干扰传输以及传输的接收还涉及就时间和频率而言的重叠。在很多当代的WWAN中，就时间和频率而言的用于发送和接收的无线电资源是根据正交频分复用(OFDM)调制方案的版本定义的。
图2描绘了就时间和频率而言的划分，其根据3GPP LTE描绘了针对一种类型的DL传输的示例OFDM调制方案。但是，其他OFDM和非OFDM调制方案也是可能的。在示例中就时间而言，描绘了来自帧流的单个无线帧202，其被定义为包括10毫秒(ms)的下行链路传输信号。可以将帧分割或者划分成十个子帧204，每一子帧1ms长。可以将子帧进一步细分为两个时隙206，一个时隙具有0.5ms的时长。
时隙206的0.5ms的时长能够与物理资源块(PRB或RB)208a-x的时距相符。如3GPP TS36.211的Section5.2.3和Section6.2.3所进一步定义的，PRB可以是3GPP LTE标准内能够由传输点调度单元指定的最小资源分配单元。出于资源分配的目的，对于时间和频率，其他标准定义了类似的单元。除了其0.5ms的时间跨度之外，PRB还跨越一定范围的频率。个别PRB具有不同的频率跨度，如图2中对于频率，由PRB递增序列所描绘出。
更具体而言，个别PRB208a-x可以包括12个不同的15kHz子载波208k-2(在频率轴上)并且每一子载波具有6或7个OFDM符号208k-2(在时间轴上)。就频率和时间维度而言，各子载波和OFDM符号能够建立84个资源元件(RE)210的网格，其中PRB208k包括7个OFDM符号。RE能够根据所采用的调制发送不同数量的位，从二进制相移键控(BPSK)情况下的单个位，到64正交幅度调制(QAM)或64QAM的六个位。
可以采用对应于不同PRB208a-x或者其他类似的资源分配单元的不同频率以避免干扰问题。传输点之间的少量的协调能够使干扰避免成为可能。可以采用下图进行说明。
图3描绘了能够被协调的WWAN的一部分。在3GPP LTE标准当中，可以将这样的协调称为协作多点(CoMP)。与图1类似，图3描绘了可以是MCN eNodeB302的高功率传输点的覆盖区域300。覆盖区域包括一组三个不同的基本上为六边形的小区304a-c，它们是由三个不同的传输方向306a-c得到的。在覆盖区域内还有可以是LPN的第一功率相对较低的传输点308a，以及也可以是LPN的第二功率相对较低的传输点308b。
第一LPN308a和第二LPN308b产生了第一额外覆盖区域310a和第二额外覆盖区域310b。可以将第一LPN308a配置为通过第一回程链路312a与MCN302通信。此外，可以将第二LPN308b配置为通过第二回程链路312b与MCN302通信。此外，可以在第一LPN和第二LPN之间建立回程链路。
可以通过各种方式使用通过各条回程链路312促成的协调。例如，可以使用其提高服务均匀性。可以是UE的无线移动设备314处于覆盖区域300以及第一和第二额外覆盖区域310a、310b的边界区域附近。由于UE的地理位置的原因，为UE提供与它在其他位置能够接收到的相同的覆盖均匀性可能存在困难。
为了提高覆盖均匀性，可以采用回程链路312协调来自第一LPN308a的第一传输316与来自第二LPN308b的第二传输318同相到UE314。作为同相传输，可以同时发送第一和第二传输。根据3GPP LTE，将这样的同时传输称为联合传输(JT)。可以针对来自UE的UL传输的联合接收采取类似的方法。或者，可以根据变化的信道质量，在回程链路协调的帮助下，动态地改变实现向UE的发送或者从UE的接收的传输点。在3GPP LTE中，将这样的动态变化称为动态点选择(DPS)。
也可以采用通过各条回程链路312促成的协调，以利用对应于不同PRB208a-x或者其他类似的资源分配单元的不同频率。如本文中使用的，可以由短语“资源分配单元”、“资源块”以及类似术语代替术语“PRB”，反之亦然。例如，可以通过MCN和LPN308a、308b之间的回程链路传达功率水平，其中，在所述功率水平上，MCN302被调度为在各个频率相关资源分配单元/PRB上传输。借助这一信息，第一LPN308a能够调度无线移动设备314的第一LPN传输316，其可以是来自那些不同频率处的UE，在所述频率上，MCN被调度发送高功率水平以避免干扰。第二LPN308b可以对第二传输318进行相同的操作。可以在多个LPN和/或MCN之间采用类似的方法。在3GPP LTE中，不同频率上调度的功率水平的传达被称为ICIC。
在不同的频率上，图1描绘的空间邻近性和重叠不再呈现出可能的干扰情形。但是，随着WWAN变得越来越复杂，以提高带宽和服务均匀性以及满足其他目的，频率传输的协调也变得更复杂。将借助下述附图描述额外复杂化的一个示例。
图4是说明分布式传输点因跨分布式传输点共享共同的身份而使得干扰避免复杂化的情形的方框图。再次描绘了可以是MCN的功率相对较高的传输点402的覆盖区域400。在覆盖区域内，描绘了几个功率相对较低的传输点408a-f。功率相对较低的传输点可以是远程无线电头(RRH)收发器。
RRH收发器408a-f中的每个可以包括至MCN402的回程链路412a-f，以传达信息和/或协调传输。回程链路还可以起到将RRH收发器连接至它们的相应控制面板的作用，所述控制面板位于公共的传输点/MCN eNodeB402处。不仅RRH收发器的控制实体位于远程eNodeB处，所述RRH收发器还与该eNodeB402共享其作为传输点的身份。其他类型的传输点也可以共享为多个分布式传输点所共有的共享传输点身份的这一相同的特性/属性。图4描绘的公共eNodeB402的覆盖区域400内的分布的RRH与3GPP LTE的CoMP情形3和4一致。
诸如图4描绘的情形可以是有利的，其中多个分布式传输点当中共享单个传输点身份。例如，针对参考信号和/或控制信号的资源分配可以基于传输点身份。因此，公共传输点身份将产生公共资源分配。不同传输点处的公共资源分配能够避免这些参考和/或控制信号与来自协调传输情形中的其他传输点的诸如数据的其他信息之间的冲突。
例如，在3GPP LTE CoMP情形3和4中，公共传输点身份将产生针对小区特定参考信号(CRS)的公共资源分配。在3GPP LTE中，演进通用陆地无线电接入网络(E-UTRAN)小区全局标识符(ECGI)提供了传输点身份的示例。CRS的传输点的协作群集中的所有传输点处的公共资源分配能够避免与同样处于协作群集内的不同传输点处的物理下行链路共享信道(PDSCH)的资源分配发生冲突。其他示例也是可能的。
但是，公共传输点身份能够使由图1中描绘的空间邻近性和重叠引起的各种形式的干扰复杂化。如下文更加详细地讨论的，公共传输点身份将使完成以下工作的方法复杂化：对于传输频率调度的干扰抑制，以及对于传输定时的反馈测量。
图5描绘了具有公共传输点身份的高和低功率传输点的共享传输功率消息530的形成。但是，令人遗憾的是，共享的传输功率消息可能无法向相邻传输点可靠地报告避免干扰的传输机会，如下面解释。在图5中，显示了一对高功率传输点502、503的一对覆盖区域500、501，所述传输点每个可以包括MCN。
与图4的情况一样，在第一覆盖区域500内，描绘了与MCN502共享公共传输点身份的几个RRH或其他收发器。在第一MCN和第二MCN之间可能存在回程链路512，可以在该链路上传达有关功率水平的频率相关信息。还显示了针对第一MCN的对于频率相关资源分配单元/PRB的各传输功率水平的图表522。此外，还提供了针对低功率RRH的对于频率相关资源分配单元/PRB的各传输功率水平的类似图表524。
第一MCN502的图表522表明，前两个PRB(在其对应频率范围内具有相对较低的频率值)被调度为以高功率水平进行传输。但是，其余PRB被调度为在低功率水平上静默。相反，RRH收发器的图表524表明，将所有PRB都调度为在与RRH收发器的高功率水平相当的功率水平上进行传输。由于RRH收发器不能在与MCN的功率水平一样高的功率水平上进行传输，因而所调度的PRB的功率水平要比MCN的功率水平低一些。在第一MCN502和RRH收发器之间的回程链路上传达：RRH收发器被调度为在其上进行传输的功率水平，类似于对于图4描述的回程链路412。
在降低覆盖区域间干扰的努力当中，第一MCN502可以通过第一MCN502和第二MCN503之间的回程链路512向第二MCN503传达传输功率消息530。但是，由于第一MCN和RRH收发器共享相同的传输点身份，因而针对所述共享传输点身份的传输功率消息可以包括对于MCN和RRH收发器两者的每个PRB的合并传输功率水平。在接近图5底部的地方描绘了第一MCN和RRH收发器处的传输功率水平的结合(通过会聚箭头指示)的合并功率水平图表526。
合并功率水平图表526对于每一PRB将共享相同传输点标识的两种不同类型的传输点的调度的传输功率水平相加。所述的两种不同类型的传输点可以对应于第一MCN502和RRH收发器。由于传输功率消息是在传输点身份的基础上传达的，因而能够在这些合并传输功率水平的基础上生成传输功率消息530。在图5描绘的情形下，将各种RRH收发器调度为对于每一PRB在相同的功率水平上进行传输。但是，有可能将个别RRH收发器调度为针对相同的PRB以不同的功率水平进行传输，其将使传输功率消息526进一步复杂化。
为了降低在回程链路512上传达的重复的传输功率消息所造成的负担，并且促进其解释的简易化，连同其他原因，能够将传输功率消息530配置成位图。这样的位图中的每一位能够采用1或0指示对于给定频率范围上的每一PRB而言传输功率水平是否高于或低于功率水平阈值528。
在3GPP LTE当中，这样的基于位图的传输功率消息530的一个示例是相对窄带传输功率(RNTP)消息。能够在3GPP LTE规范当中，尤其是在技术标准(TS)36.213当中找到有关RNTP的额外细节。如图5描绘的示例，针对每一传输点身份发送单个RNTP消息。因此，当前，在CoMP情形3和CoMP情形4当中，在判定给定频率范围上的具体PRB是否高于或者低于预定义阈值时，合并针对高功率MCN502和低功率RRH两者的传输功率水平。因此，RNTP位图不提供有关以下频率的准确信息：以高功率传输第一MCN所处的频率，以及相邻的第二MCN503能够调度传输以避免干扰的频率。
由于RRH收发器的功率水平比MCN502的功率水平低得多，因而即使RRH收发器在其最高水平上进行传输，当MCN不在高功率水平上传输时，第二MCN503也能够实际调度UE的传输，而没有不可接受的干扰水平。因此，传输功率消息530提供的信息拿走了避免覆盖区域间干扰的机会。传输功率消息530只是简单地指示在所有PRB上传输功率水平都高于阈值528。因此，相邻的第二MCN503并不知道，在除了两个以外的所有的这些PRB上都能够避免不可接受的覆盖区域间干扰。
但是，图6根据一个示例描绘了利用多个传输功率消息636、644向相邻传输点603可靠地报告避免干扰的传输机会。再次针对一对高功率传输点602、603示出了一对覆盖区域600、601，所述传输点的每个可以包括MCN。与图4的情况一样，在第一覆盖区域600内，描绘了与MCN602共享公共传输点身份的几个RRH或其他收发器，它们中的每个具有与第一MCN通信的回程链路。能够在其上传达有关功率水平的频率相关信息的回程链路612还连接第一MCN与相邻的第二MCN603。
将第一MCN602调度作为DL传输点进行DL传输。提供了针对频率相关资源分配单元/PRB的功率水平的高功率传输点图表630。如前所述，高功率传输点图表表明，将在其对应频率范围内具有相对较低的频率值的前两个PRB调度为以高功率水平进行传输。但是，将其余PRB调度为静默。
还提供了低功率传输点图表638。低功率传输点图表报告各PRB的功率水平，在其上低功率传输点(可以是RRH收发器)被调度的用于传输功率水平和静默。这些低功率传输点可以与第一MCN602共享相同的传输点身份。
但是，与图5不同的是，第一传输功率消息636是在第一MCN602的调度的功率水平的基础上形成的，没有结合RRH收发器的调度的功率水平。可以将第一传输功率消息配置为指示将第一组资源块(可以是PRB)被设置为进行高于第一阈值634的传输，将第二组资源块设置为静默和/或进行等于或低于第一阈值的传输。
第一传输功率消息636可以包括位图，其中，每一PRB占一位。这些位中的每个能够指示其对应的PRB是否被调度为进行高于第一阈值634的传输。在所述示例中，采用1指示高于第一阈值的功率水平，采用0指示不高于第一阈值的功率水平，但是这些含义可以调换。
可以按照相同的方式生成第二传输功率消息644。第二功率消息也可以在具体PRB的功率水平(如低功率传输点图表638中指示的)是否分别高于第二阈值642的基础上，指示第一和第二组PRB。根据所述实施例，第一阈值634和第二阈值642可以对应于不同功率水平，所述功率水平是与采用它们为其提供信息的传输点相适应的。在一些实施例中，可以在判断功率水平是否高于第一或第二阈值之前通过共享公共传输点身份的传输点的最大传输功率使功率水平归一化。
可以将指示符632附着至第一传输功率消息636。可以将所述指示符配置为标识对应于第一传输功率消息636的DL传输点的一个或多个属性。这样的属性的一个非限制性示例可以是DL传输点为高功率传输点还是低功率传输点。高功率传输点和低功率传输点之间的区分可以基于：相对于具有公共传输点身份的其他传输点的最大传输功率的传输点的最大传输功率。
这样的属性的另一非限制性示例可以是传输点特定标识。这样的标识的示例可以包括虚拟小区标识和/或传输点索引内的索引值。在这样的实施例中，能够提供个别传输功率消息给共享公共传输点身份的一组传输点内的个别传输点，而不仅仅是传输点类别。在这样的实施例中，出于传输功率消息的形成的目的，个别传输点可以具有其自己的阈值。
在一些实施例中，共享公共传输点身份的传输点可以是CoMP群集内的各种传输点，例如与3GPP LTE的情形3或4一致的CoMP群集。在这样的实施例中，高功率传输点可以是MCN eNodeB。此外，低功率传输点可以是RRH。
一旦形成了各传输功率消息636、644，就可以通过回程链路612将它们发送至相邻的第二MCN603。与图5中发送的单传输功率消息不同，发送至少两个传输功率消息636、644。两个或更多传输功率消息尽管具有公共的传输点身份，但是能够通过附着于其上的指示符634、640得到区分。
在图6所描绘的情形当中，附着至第一传输功率消息636的第一指示符632指示第一传输功率消息对应于功率相对较高的传输点602，例如MCN。附着至第二传输功率消息642的第二指示符640指示，第二传输功率消息报告功率相对较低的传输点的传输功率水平，例如RRH。采用交叉影线字段描绘了第一指示符，采用纯空白字段描绘了第二指示符，以表明两种指示符指示着它们的报告所针对的传输点的不同属性。表示替代属性的指示符，例如上文讨论的那些属性，也是可能的。尽管在图6中指示符位于传输功率消息的尾端，但是它们可以位于这样的消息内的任何位置。
尽管具有公共的传输点身份，但是第二MCN603能够通过第一指示符632和/或第二指示符642，将第一传输功率消息636与第二传输功率消息644区分开。由于两种传输功率消息的原因，第二MCN能够确定尽管将功率相对较低的传输点调度为跨各PRB的所有频率范围进行传输，但是仅针对前两个PRB将功率相对较高的传输点调度为以高功率水平进行传输。因此，第二MCN能够在PRB上对处于两个覆盖区域600、601之间的边界附近的可以是UE的无线移动设备614进行调度，其中，该PRB所处的频率范围与第一MCN602被设置为以低于功率阈值的功率进行传输的资源块的频率范围相同。
就图6描绘的情形而言，第二MCN603能够在对应于第三、第四、第五和第六PRB中的任何一个的频率上，对边界UE特定DL传输618进行调度。尽管将低功率传输点调度为在这些PRB内进行传输，但是较低的功率水平使得干扰水平620是可接受的。相反，来自前两个PRB的频率上的第一MCN的DL泄漏616将使得干扰水平不可接受，因为第一MCN602传输在相对较高的功率水平。
在与3GPP LTE一致的某些实施例中，第一传输功率消息636和第二传输功率消息644两者可以是被配置为具有一个或多个指示符632、640的RNTP消息。在某些实施例中，也可以采用指示符的不存在，用于指示对应的传输功率消息具有或者不具有某一属性。在这样的实施例中，可以通过包括X2接口的回程链路612将两个或更多RNTP消息传达给相邻传输点，例如，第二MCN603。
尽管能够通过在同一覆盖区域内或者在相邻覆盖区域内调度不同的频率而部分地避免干扰，这种方法对于某些通信资源，仍然存在问题。这样的通信资源，例如用于访问WWAN以及保持无线电链路的那些通信资源，例如，同步信号、参考信号、以及控制信息可能是不可重新调度的。可能将它们预先分配为占据一组频率资源，无线设备能够依赖于它们的占据而允许所述无线设备采用所述通信资源用于其服务的各种功能。
为了克服由这些相对于频率而言不可移动的资源带来的问题，尤其是在异构网络内，开发出以下方法：传输点能够请求相邻传输点提供时隙，在所述时隙内它们减少传输。于是，第一传输点能够采用这些减少传输时隙调度其自身的无线移动设备的传输，由此减少了与相邻传输点的干扰问题。通过在频率之外采用时间作为另一资源来避免使信令发生重叠，所述的不可移动的资源的通信能够没有干扰地进行。引入到3GPP LTE规范的版本10中的增强小区间干扰协调(eICIC)提供了这样的方法的一个示例，其采用时域进行围绕干扰问题的调度。
在eICIC中，一个eNodeB请求至少一个相邻eNodeB提供低传输功率时隙。可以通过保留与对于图2所讨论的那些的相似的某些子帧，给低功率传输提供这些低传输功率时隙。可以采用术语“时隙”代替文中采用的术语“子帧”，反之亦然。这些子帧被称为几乎空白的子帧(ABS)。ABS从子帧中去除尽可能多的传输资源，以降低干扰的可能。但是，由于还存在可能被认为值得保留的传输资源，因而ABS被称为“几乎空白的”。例如，可以保留一些传输资源用于控制信息、反馈信息、寻呼信息(paginginformation)、和/或某些参考信号。可以按照重复模式布置ABS。因此，与具有周期性ABS模式的传输点相邻的传输点能够为其相关联无线移动设备设置传输的周期性调度。
尽管这样的用于抑制干扰的时域方法减少了干扰并且提高了信道质量，但是信道质量仍然是重要的议题。例如，为了在每一RE内发送数量越来越多的位，对诸如BPSK、正交相移键控、16正交调幅(QAM)或64QAM的调制方法做出的选择可能取决于信道质量测量结果。因此，信道质量的测量持续发挥着作用。
ABS模式的周期性质，以及类似的低功率传输功率时隙方案，使得将用于测量信道质量的参考信号也配置为具有类似模式变得重要。否则，在参考信号的基础上进行信道质量测量的无线移动设备可能无法对ABS和非ABS做出一致的测量。能够在传输点身份的基础上将资源分配给用于信道质量测量的参考信号，其采取的方式将使得信道质量测量复杂化，将会参考下图进行解释。
图7示出了具有公共传输点身份的各传输点的参考信号742a-b、746a-b。由于公共传输点身份，参考信号在资源分配方面是一致的，从而给用于反馈的可靠测量带来了问题。描绘了可以是MCN的高功率传输点702的覆盖区域700。与图4的情况一样，在覆盖区域内描绘了与MCN共享公共传输点身份的几个RRH708或其他收发器。
描绘了对应于ABS模式或者类似的低功率传输功率时隙方案的第一组八个子帧740。第一组八个子帧描述了MCN702的ABS模式，如第一组八个子帧的左侧的MCN图标所示。第一组八个子帧当中的前两个子帧被描绘为纯空白字段，包括两个ABS，而其余的六个子帧被描绘为菱形交叉影线，包括六个非ABS。
还采用对角交叉影线描绘了第二组八个子帧744，其代表由RRH708或与MCN702共享公共传输点身份的其他收发器传输的子帧。但是第二组八个子帧未配置具有ABS模式。相反，RRH能够采用MCN的ABS模式将被预先分配为占据设定的频率资源的通信资源的传输调度到在MCN处被调度用于ABS的时隙或子帧当中。尽管RRH的额外覆盖区域与MCN的覆盖区域700重叠，但是在这些ABS当中调度这些预先分配的通信资源能够允许RRH抑制干扰。
第二组八个子帧744被描绘为具有一对参考信号组746a-b，它们可以是由处于RRH覆盖区域内的可以是UE的无线移动设备714先验已知的或者可以传达给无线移动设备714。可以通过UE测量这些参考信号组中的一个或多个以评估UE和RRH之间的信道。但是，同一对参考信号组742a-b还被分配给了来自MCN702的传输718内的相同时间和频率资源。
可以将同一对参考信号组742a-b、746a-b分配为占据来自RRH716的传输和来自MCN718的传输内的相同组的资源，因为能够在传输点身份的基础上将参考信号配置以及分配至资源。在基于传输点身份将参考信号配置并以及分配至资源的情况下，UE714能够将诸如信道测量的测量与涉及传输点身份的传输点关联起来。也可以将这样的参考信号配置和分配为具有与ABS模式的周期性匹配的周期性。在3GPP的背景下，CRS提供了参考信号的一个示例，其中，能够在传输点身份的基础上将参考信号配置和分配为具有与ABS模式的周期性相等的周期性。
但是，在多个传输点共享相同身份的情况下，可能导致混淆。例如，相对于图7，基于RRH708提供的参考信号746a-b的针对RRH708的任何信道测量748a-b可能因MCN702的相同参考信号742a-b发生混淆。尽管在一个传输点涉及给定传输点身份的情况下基于时域的干扰解决方法，例如，eICIC能够依赖基于传输点身份配置和分配的参考信号进行信道测量，但是具有相同的传输点身份的多个传输点可能导致不准确的测量。
共享公共传输点身份的多个传输点的群集是被实现为提高谱效率的不同异构网络情形的部分。诸如RRH的不同异构元件根据它们的性质共享传输点身份。在3GPP LTE的背景下，CoMP情形3和CoMP情形4提供了共享公共传输点身份的多个传输点的群集的示例。但是，这些以及其他情形可能依赖于新的解决方法，其中通过所述方法能够获得信道测量。
图8描绘了被调度用来从共享相同传输点身份的不同传输点进行传输的子帧组840、844。如下文所讨论的，能够采用在第二组子帧844中描绘的一对参考信号组846a-b建立准确的测量和/或信道评估。用于这些测量和评估的参考信号组可以被配置，并且以除了传输点身份之外的事物为基础。
能够针对RRH808或与诸如MCN的高功率传输点802共享公共的传输点身份的其他收发器进行准确的信道测量和/或评估848a-b。但是，首先配置新的一组参考信号用于测量干扰。这一新的一组参考信号并不是唯独在传输点身份的基础上进行配置和分配的。相反，能够借助对新的一组参考信号的配置和/或分配，使新的一组参考信号与促进传输点的一个或多个特性/属性相关，其中所述促进传输点被调度以传输它们808。可以采用一个或多个特性/属性将促进传输点与共享相同传输点身份的传输点群集中的至少一个其他传输点鉴别/区分开。
以说明而非限制的方式，这样的特性/属性的示例可以包括特定传输点的节点层或唯一身份。节点层可以包括但不限于高功率MCN eNodeB802或者一组LPN，例如，RRH808。因此，能够将参考信号配置为与传输点群集内的RRH、MCN或个别传输点相关。由于这样的参考信号能够被特别配置和分配至传输点群集内的传输点子集，因而能够避免与传输点群集的其他部分的传输点的参考信号重叠配置和分配。
然后，能够将有关该组参考信号846a-b的信息发送至一个或多个与促进传输点808相关联的可以是UE的无线移动设备812。之后，这些UE能够采用该组参考信号进行一个或多个传输点特有的干扰测量848a-b，所述一个或多个传输点所具有的特性/属性能够充当该组新的参考信号846a-b的配置和分配的基础。此外，能够将该组参考信号配置为具有与一个或多个传输点808的ABS模式的周期性基本上类似的周期性，所述一个或多个传输点808具有相同的传输点身份，但是它们不共享与该组参考信号相关的所述一个或多个特性/属性。此外，能够将新的一组参考信号配置为具有：专用于测量ABS上的干扰的第一参考信号子集，和专用于测量非ABS上的干扰的第二参考信号子集。
在一些实施例中，能够将该组参考信号生成为具有基本为零的功率。在给定UE812处接收到的信号等于信道乘以参考信号加上噪声/干扰。在参考信号是零的情况下，由于不管信道如何，信道和零值参考信号的乘积都将为零，因而能够避免信道估算。因此，能够简化等式，从而使所接收到的信号等于噪声/干扰。因而，能够将在零功率参考信号期间测得的归于来自未共享与所述的新的一组参考信号846a-b相关的一个或多个特性/属性的传输点的干扰。
由于能够将测量与来自不感兴趣的传输点的信号解耦，尽管它们与感兴趣的传输点共享公共的传输点身份，但是所述测量还是能够获得来自进行测量的无线设备的更加可靠的反馈。可以采用这些测量提供与感兴趣的传输点相关的更加准确的反馈。在新的一组参考信号涉及非零值的情况下，类似的方法也是可能的。但是，能够首先执行信道估算，从而能够减出接收信号中不属于来自相邻传输点的干扰的部分。
在3GPP的背景下，未绑定至具体传输点身份的参考信号的格式的一个示例是信道状态信息参考信号(CSI-RS)格式。E-UTRAN和/或其内的eNodeB能够采用无线电资源控制(RRC)信令配置第一组零功率CSI-RS资源846a。可以将第一组零功率CSI-RS配置为与传输点群集内的一个或多个感兴趣的传输点的一个或多个特性/属性相关。在图8描绘的情形当中，第一组零功率CSI-RS与后面将讨论的第二组零功率CSI-RS846b一样能够与RRH传输点808相关。在一个非限制性示例中，相关特性/属性可以是相关传输点属于具有低功率传输点的节点层。
可以将第一组零功率CSI-RS846a配置为被分配到相同的子帧内，对于所述子帧而言，群集内不与第一组零功率CSI-RS相关的传输点被调度至ABS，如在第一组零功率CSI-RS的上面描绘的第一组子帧840中纯空白字段描绘。之后，UE812能够进行第一组零功率CSI-RS的第一测量848a，以获得在ABS期间有关干扰的信息。
类似地，还能够将第二组零功率CSI-RS846b配置为具有采用RRC信令，以与RRH传输点808相关。可以将第二组零功率CSI-RS配置为被分配到相同的子帧中，其中，群集内不与第一组零功率CSI-RS相关的传输点被调度至非ABS，如在第二组零功率CSI-RS的上面显示的第一组子帧840中菱形交叉影线字段所描绘。之后，UE812能够进行第二组零功率CSI-RS的第二测量848b，以获得在非ABS期间有关干扰的信息。
之后，UE能够将第一和第二测量848a-b用于一个或多个相关传输点，以生成对一个或多个相关传输点的反馈。这样的反馈能够采取信道状态信息(CSI)和/或信道质量指示符(CQI)的形式，以提供一些非限制性示例。可以采用这样的信息确定调制方法，以及做出其他指定给E-UTRAN和部件eNodeB的决定。
此外，能够将第一组零功率CSI-RS846a和第二组零功率CSI-RS846b两者配置为具有周期性，其等于非相关传输点上的ABS模式的周期性。在典型eICIC情形中，ABS的周期性可以是8ms。在某些实施例中，可以将每一组零功率CSI-RS配置为相隔4ms。额外的使ABS模式和CSI-RS模式之间的周期性同步的方法也是可能的。
如果配置了周期性物理上行链路控制信道(PUCCH)CSI报告，那么应当将诸如cqi-pmiConfigIndex和cqi-pmiConfigIndex2的报告参数配置为对应于第一组零功率CSI-RS846a和第二组零功率CSI-RS846b。如果传输点触发了非周期PUCCH CSI报告，那么能够将在时间上最近的第一组零功率CSI-RS和第二组零功率CSI-RS用于对应的测量。
图9是用于跨无线传输点群集抑制干扰的方法900的流程图。方法可以但不需要必需嵌入到包括非暂时计算机可用介质的计算机程序产品当中。计算机可读介质可以具有体现于其内的计算机可读程序代码。计算机可读程序代码可以适于被执行来实现所述方法的指令。
方法900可以包括在DL传输点处配置910，RNTP消息。RNTP消息能够指示第一组资源块，在所述资源块上将DL传输点设置为以等于或高于功率阈值的功率进行传输。RNTP消息还能够指示第二组资源块，在所述资源块上将DL传输点设置为以低于功率阈值的功率进行传输。
此外，方法900可以包括标识920对应于RNTP消息的DL传输点的属性，其不同于DL传输点所属的CoMP群集的公共小区ID，所述公共小区ID还属于CoMP群集中的至少一个其他传输点。能够经由回程链路将所述RNTP消息发送930至一个或多个额外传输点。所述一个或多个额外传输点能够对处于所述DL传输点的边界附近的无线移动设备进行调度。可以在如下的资源块上调度无线移动设备：所述资源块所处的频率范围与DL传输点被设置为以低于功率阈值的功率进行传输的资源块的功率范围相同。
在一些实施例中，对应于RNTP消息的DL传输点的属性可以包括DL传输点是高功率传输点的指示。所述属性还可以包括DL传输点是DL传输点所属的CoMP群集内的低功率传输点的指示。在某些实施例中，高功率传输点可以是MCN eNodeB，低功率传输点可以是RRH。
在替代实施例中，对应于RNTP消息的DL传输点的属性可以包括DL传输点在DL传输点所属的CoMP群集内的唯一标识。在这样的实施例中，所述标识可以包括虚拟小区标识或者传输点索引内的索引值。可以针对所述DL传输点所属的CoMP群集内的传输点定义传输点索引。
方法900的某些实施例还可以包括由DL传输点所属的CoMP群集内的传输的最大传输功率，使设置给资源块的功率归一化。可以在判定是否将资源块包含到第一组资源块和所述第二组资源块之一中之前执行所述归一化。此外，在所述方法的某些示例中，功率阈值可以对DL传输点在DL传输点所属的传输点的CoMP群集内的属性而言是特有的。
在一些实施例中，消息的回程通信可以通过X2接口发生。此外，资源块可以包括处于PRB内的12个子载波。
图10描绘了根据一个示例的用于在无线通信的传输点的群集情形中减少干扰的设备1000。设备可以存在于促进传输点中，例如：能够向其分配传输点身份的诸如MCN的高功率传输点1002；能够向其分配传输点身份的诸如LPN eNodeB的低功率传输点1004；和/或不向其分配传输点身份的诸如RRH的传输点1006，其要依赖于诸如eNodeB的另一个传输点来获得其传输点身份。设备可以包括消息模块1010、区分模块1020、以及通信模块1030。
可以将消息模块1010配置为生成RNTP消息。RNTP消息可以表示来自一组资源块的至少一个资源块是否被调度为以一定的功率水平进行DL传输，所述功率水平是超过预定义阈值或者不超过预定义阈值中的一种。所述区分模块1020可以与RNTP消息模块通信。此外，可以将区分模块配置为给RNTP消息提供信息，从而区分出RNTP消息所源于的促进传输点。促进传输点具有与促进传输点所属的CoMP群集中的至少一个其他传输点共有的小区ID。可以将能够与所述区分模块通信的通信模块1030配置为通过一条或多条回程链路将RNTP消息从促进传输点传达至一个或多个相邻传输点。
在一些实施例中，区分模块1020能够通过在RNTP消息中提供关于传输点是高功率传输点还是低功率传输点的指示，而提供区分促进传输点的信息。在某些这样的实施例中，高功率传输点和低功率传输点可以属于CoMP，其中CoMP群集促进了对CoMP群集中的传输点之间的传输活动进行协调的能力。在这样的实施例中，通信模块1030可以在所述CoMP群集以外传达RNTP消息至一个或多个传输点。
在替代实施例中，区分模块1020能够通过提供虚拟小区标识和/或对应于传输点索引的索引值而提供区分所述促进传输点的信息。所述虚拟小区标识和/或所述索引值能够在CoMP群集当中唯一地标识出促进传输点。再次由对CoMP群集当中的成员传输点之间的传输活动进行协调的能力，对CoMP群集进行定义。
一些设备1000还可以包括与1010消息模块通信的归一化模块1040。可以将所述归一化模块配置为针对所述促进传输点将资源块的功率水平归一化。可以以CoMP群集内的最高功率传输点的最高功率的形式进行归一化，其中CoMP群集提供了对CoMP群集内的成员传输点之间的传输活动进行协调的能力。
设备1000还可以包括与消息模块1010通信的阈值模块1050。可以将所述阈值模块配置为判定对于来自所述促进传输点的所述RNTP消息的第一阈值水平，其中，所述促进传输点对应于相对较高的功率水平。也可以将所述阈值模块配置为判定对于所述RNTP消息的第二阈值水平，其中，所述促进传输点对应于较低功率水平。
在某些实施例中，资源块可以包括处于PRB内的12个子载波。回程链路可以是X2接口。高功率传输点可以是MCN eNodeB。
图11是抑制CoMP群集内的干扰的方法1100的流程图。方法可以但是不需要必需嵌入到包括非暂时计算机可用介质的计算机程序产品当中。计算机可读介质可以具有体现于其内的计算机可读程序代码。计算机可读程序代码可以适于被执行来实现所述方法的指令。
方法1100可以包括在促进传输点处判定1110一组CSI-RS用于测量干扰。可以使该组CSI-RS与促进传输点的一个或多个特征相关1120。一个或多个特征能够将促进传输点与一个或多个额外的传输点区分/鉴别开。由于一个或多个额外传输点不共享不共享所述促进传输点的一个或多个特征，因而能够做出所述区分。一个或多个额外传输点可以处于促进传输点所属于的CoMP群集内。可以将有关该组CSI-RS的信息传达1130至与所述促进传输点相关联的一个或多个UE。一个或多个UE可以采用该组CSI-RS进行CoMP群集中的至少一个促进传输点所特有的干扰测量。
在一些实施例中，可以将该组CSI-RS配置为以与所述一个或多个额外传输点的ABS模式的周期性基本类似的周期性进行传输。在某些这样的实施例中，对该组CSI-RS的配置还可以包括将一组CSI-RS配置为具有专门用于测量ABS上的干扰的第一CSI-RS的子集。此外，可以将第二CSI-RS子集配置为专用于测量一个或多个额外传输点的ABS模式的非ABS上的干扰。在这样的实施例中，可以将一个或多个UE配置为提供周期性测量报告。周期性测量报告可以包括第一CSI-RS子集的第一测量的第一测量报告。第二周期性测量报告还可以包括第二CSI-RS子集的第二测量的第二测量报告。
某些实施例可以包括触发在一个或多个UE处的非周期干扰测量。可以将所述非周期干扰测量配置为是在第一CSI-RS子集或第二CSI-RS子集上执行的。是在第一CSI-RS子集上还是在第二CSI-RS子集上进行非周期干扰测量可以依赖于哪一子集在时间上最接近非周期干扰测量的触发。此外，可以将该组CSI-RS生成为采用基本为零的功率进行传输的信号。具有基本为零的功率的CSI-RS能够使测量所述CSI-RS的一个或多个UE将在该组CSI-RS上测得的信号归属于干扰。
根据实施例，一个或多个特性可以包括根据所述促进传输点是否在阈值功率水平以上进行传输定义的第一特性，或者第二特性。所述第二特性可以是根据促进传输点的身份定义的。所述身份可以对应于虚拟小区标识或者对应于传输点索引的索引值。此外，可以将该组CSI-RS配置为与CSI-RS的格式一致。在这样的实施例中，上文讨论的CoMP群集可以是CoMP情形3群集或CoMP情形4群集。
图12描绘了根据一个示例的用于在无线传输点群集情形中，减少群集内干扰的设备1200。所述设备可以存在于主传输点中，例如：能够向其分配传输点身份的诸如MCN的高功率传输点1202；能够向其分配传输点身份的诸如LPN eNodeB的低功率传输点1204；和/或不向其分配传输点身份的诸如RRH的传输点1206，其要依赖于诸如eNodeB的另一个传输点来获得其传输点身份。所述设备可以包括配置模块1210和通信模块1220。
可以将配置模块1210配置为配置所述主传输点所属的CoMP群集当中的节点层或具体传输点所特有的一组CSI-RS。可以将可以与配置模块通信的通信模块1220配置为将配置信息从主传输点传达至与主传输点相关联的至少一个用户设备(UE)。配置信息可以允许UE进行对CoMP群集内的干扰的测量。
在一些实施例中，配置模块1210可以将该组CSI-RS中的一个或多个CSI-RS配置为以零功率进行传输。此外，配置模块可以以对该组CSI-RS进行定位和排序的资源分配的形式，对CoMP群集当中的节点层或具体传输点所特有的该组CSI-RS进行配置。
而且，就配置模块1210而言，所述配置模块可以被配置为：具有带有子帧偏移的该组CSI-RS的周期性，其与一个或多个额外传输点的ABS模式的周期性吻合。通过这种方式，可以使干扰测量与ABS模式相关。配置模块还可以配置该组CSI-RS内的第一CSI-RS群(在其上测量ABS)和该组CSI-RS内的第二CSI-RS群(在其上测量非ABS)。第一CSI-RS群和第二CSI-RS群的配置可以基于：关于主传输点接收到的至少一个额外传输点的ABS模式的信息。
就通信模块1210而言，通信模块能够与和主传输点相关联的一个或多个UE通信，以提供单独测量报告。单独测量报告可以对应于第一CSI-RS群和第二CSI-RS群，从而进行周期性报告。或者，通信模块可以对与主传输点相关联的一个或多个UE进行配置，以提供单独测量报告。单独测量报告可以对应于第一CSI-RS群和第二CSI-RS群中与主传输点发出非周期请求所在的子帧最接近的那个群。
在一些实施例中，可以将该组CSI-RS中的CSI-RS配置为CSI-RS。CoMP群集可以是CoMP情形3群集或CoMP情形4群集。节点层可以包括CoMP群集内的高功率MCN eNodeB或者一组LPN。
图13提供了移动设备的示例图示，例如UE、移动站(MS)、移动无线移动设备、移动通信设备、平板电脑、手机、或者其他类型的移动无线移动设备。移动设备可以包括一个或多个被配置为与BS、eNodeB、或者其他类型的WWAN传输点通信的天线。尽管描绘了两个天线，但是移动设备可以具有处于一个和四个之间的天线或者更多天线。可以将移动设备配置为采用至少一个无线通信标准进行通信，包括3GPP LTE、全球微波互连接入(WiMAX)、高速分组接入(HSPA)、蓝牙、WiFi、或其他无线标准。移动设备可以针对每种无线通信标准采用单独的天线或者针对多种无线通信标准采用共享天线进行通信。所述移动设备能够通过无线局域网(WLAN)、无线个人区域网(WPAN)、和/或WWAN进行通信。
图13还提供了能够用于来自移动设备的音频输入和输出的麦克风以及一个或多个扬声器的图示。显示屏可以是液晶显示器(LCD)屏幕，或者其他类型的显示屏，例如，有机发光二极管(OLED)显示器。可以将显示屏配置为触摸屏。所述触摸屏可以采用电容式、电阻式、或者其他类型的触摸屏技术。可以将应用处理器和图形处理器耦合至内部存储器，以提供处理和显示能力。也可以采用非易失性存储器端口为用户提供数据输入/输出选项。也可以采用非易失性存储器端口扩展移动设备的存储器能力。可以使键盘与移动设备集成，或者可以将键盘无线连接至移动设备，以提供额外的用户输入。也可以采用触摸屏提供虚拟键盘。
应当理解，本说明书中描述的很多功能单元被标示成了模块，为了更具体地强调其实现独立性。例如，可以将模块实现为硬件电路，包括定制VLSI电路或门阵列、诸如逻辑芯片的现成半导体、晶体管、或其他分立部件。也可以将模块实现到可编程硬件设备中，例如，现场可编程门阵列、可编程阵列逻辑、可编程逻辑设备等。
也可以在由各种类型的处理器执行的软件中实现各个模块。例如，所标识出的可执行代码的模块可以包括一个或多个计算机指令的物理或逻辑块，例如，其可以将其组织为对象、过程、或功能。但是，所标识出的模块的可执行文件未必在物理上处于一处，而是可以包括存储在不同位置上的不同的指令，当其在逻辑上结合到一起时，包括模块并实现模块的所述用途。
实际上，可执行代码的模块可以是单条指令或很多条指令，其甚至可以在几个不同的代码段上、在不同的程序当中、以及跨几个存储设备分布。类似地，这里可以将操作数据标识以及图示为处于模块内，可以将其体现为任何适当的形式，并且可以将其组织到任何适当类型的数据结构内。可以将操作数据收集为单个数据集，或者其可以在不同的位置上，包括在不同的存储位置上分布，并且可以至少部分地仅仅作为系统或网络上的电子信号存在。所述模块可以是无源的或者可以是有源的，包括可用于执行预期功能的代理。
各种技术或者其某些方面或部分可以采取体现在有形介质当中的程序代码(即指令)的形式，例如，软盘、CD-ROM、硬盘驱动器、或者任何其他机器可读存储介质，其中，在将程序代码加载到诸如计算机的机器当中并由其运行时，所述机器将变为实践所述的各种技术的器件。就可编程计算机上的程序代码运行而言，计算设备可以包括处理器、可由处理器读取的存储介质(包括易失性和非易失性存储器和/或存储元件)、至少一个输入设备、以及至少一个输出设备。可以实现或者利用文中描述的各种技术的一个或多个程序可以采用应用编程接口(API)、可重复使用的控制等等。可以通过高级过程语言或者面向对象的编程语言将这样的程序实现为与计算机系统通信。但是，如果希望，可以通过汇编语言或机器语言实现所述程序。在任何情况下，所述语言都可以是经过编译或解释的语言，并且可以和硬件实现相结合。
贯穿本说明书对“一个实施例”或“实现”的引用是指在本发明的至少一个实施例中包含了联系所述实施例描述的特定特征、结构、或特性。因而，贯穿本说明书中的各个地方出现的短语“在一个实施例中”或者“在实施例中”未必全部是指同一实施例。
为了方便起见，可以将文中采用的多个项、结构元件、成员件、和/或材料提供到公共列表当中。但是，这些列表应当被视为就像列表中的每一成员都被单独地标识为独立的独特成员。因而，不应仅仅基于其在共同组内的呈现，将该列表中的单独成员视为相同列表的任何其他成员的事实等价物，除非有相反的指示。此外，这里可能是将本发明的各种实施例和示例连同其各种构成部分的替代一起引述的。应当理解，不应将这样的实施例、示例、以及替代视作实际上等同于另一实施例、示例和替代，而是应当认为是本发明的单独的自主表示。
此外，可以通过任何适当的方式将所描述的特征、结构、或特性结合到一个或多个实施例中。在上述说明中提供了很多具体的细节，例如，材料、紧固件、尺寸、长度、宽度、形状等的示例，其目的是为了提供对本发明的实施例的彻底理解。但是，本领域技术人员应当认识到，能够在无需这些具体细节中的一个或多个，或者采用其他方法、部件、材料等来实践本发明。在其他情况下，没有详细显示或者描述公知的结构、材料或操作，以避免对本发明的各个方面造成混淆。
尽管上述示例通过一项或多项具体的应用对本发明的原理做出了举例说明，但是对于本领域普通技术人员而言，可以在不需要运用发明能力以及不背离本发明的原理和构思的情况下得到形式、用途、以及实现细节的多种修改。因此，其并非旨在对本发明构成限制，本发明只受下文阐述的权利要求的限制。

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1.一种用于跨无线传输点的群集抑制干扰的方法，其包括：
在下行链路(DL)传输点处配置相对窄带传输功率(RNTP)消息，其指示第一组资源块和第二组资源块，在所述第一组资源块处将所述DL传输点设置为以等于或者高于功率阈值的功率进行传输，在所述第二组资源块处将所述DL传输点设置为以低于所述功率阈值的功率进行传输；
标识出所述DL传输点的对应于所述RNTP消息的属性，该属性不同于所述DL传输点所属的协作多点(CoMP)群集的公共小区标识(小区ID)，所述公共小区ID还属于所述CoMP群集中的至少一个其他传输点；以及
经由回程链路将所述RNTP消息发送至至少一个额外传输点，从而使至少一个额外传输点能够在与如下的资源块具有相同的频率范围的资源块上调度处于所述DL传输点的边界附近的无线移动系统：所述DL传输点被设置为以低于所述功率阈值的功率进行传输的资源块。
2.根据权利要求1所述的方法，其中，所述属性包括所述DL传输点是所述DL传输点所属的CoMP群集内的高功率传输点和低功率传输点之一的指示。
3.根据权利要求2所述的方法，其中，所述高功率传输点是宏节点(MCN)演进节点B(eNodeB)，所述低功率传输点是微小区、微微小区、毫微微小区、家庭eNodeB小区(HeNB)、远程无线电头(RRH)、远程无线电器件(RRE)、以及转发器之一。
4.根据权利要求1所述的方法，其中，所述属性包括在所述DL传输点所属的CoMP群集内，所述DL传输点所特有的标识，其中，所述标识包括虚拟小区标识和处于所述CoMP群集内的传输点的传输点索引内的索引值之一。
5.根据权利要求1到4的任一项所述的方法，还包括在判定是将资源块包含到所述第一组资源块内还是包含到所述第二组资源块内之前，根据所述DL传输点所属的所述CoMP群集内的传输的最大传输功率使设置给所述资源块的功率归一化。
6.根据权利要求1到4的任一项所述的方法，其中，所述功率阈值是在所述DL传输点所属的所述CoMP群集内的所述DL传输点的属性所特有的。
7.一种用于减少用于无线通信的传输点的群集情形下的干扰的系统，包括：
用于在促进传输点处生成相对窄带传输功率(RNTP)消息的单元，所述RNTP消息表示是否将来自一组资源块的至少一个资源块调度为以一定的功率水平进行下行链路(DL)传输，所述功率水平是高于预定义阈值的功率水平以及不高于所述预定义阈值的功率水平之一；
用于为所述RNTP消息提供区分出所述RNTP消息所源自的所述促进传输点的信息的单元，其中，所述促进传输点具有与所述促进传输点所属的协作多点(CoMP)群集中的至少一个其他传输点所共有的小区标识(小区ID)；以及
用于通过至少一条回程链路将所述RNTP消息从所述促进传输点传达至至少一个相邻传输点的单元。
8.根据权利要求7所述的系统，其中，所述用于提供区分出所述促进传输点的信息的单元在所述RNTP消息中提供有关所述传输点是否是高功率传输点和低功率传输点之一的指示。
9.根据权利要求8所述的系统，其中，所述高功率传输点和所述低功率传输点属于所述CoMP群集，其中，所述CoMP群集促进了对所述CoMP群集中的传输点之间的传输活动进行协调的能力，并且其中，所述用于将所述RNTP消息传达至至少一个传输点的单元在所述CoMP群集以外传达所述RNTP消息。
10.根据权利要求8和9的任一项所述的系统，其中，所述资源块包括处于物理资源块(PRB)内的12个子载波，所述回程链路是X2接口，所述高功率传输点是宏节点(MCN)演进节点B(eNodeB)，所述低功率传输点是微小区、微微小区、毫微微小区、家庭eNodeB小区(HeNB)、远程无线电头(RRH)、远程无线电器件(RRE)、以及转发器之一。
11.根据权利要求7所述的系统，其中，所述用于提供区分出所述促进传输点的信息的单元提供虚拟小区标识和对应于传输点索引的索引值之一，其中，所述虚拟小区标识和所述索引值在所述CoMP群集当中唯一地标识出所述促进传输点，其中，所述CoMP群集提供了对所述CoMP群集内的成员传输点之间的传输活动进行协调的能力。
12.根据权利要求7、8、9和11的任一项所述的系统，还包括用于判定对于来自所述促进传输点的所述RNTP消息的第一阈值水平和对于所述RNTP消息的第二阈值水平之一的单元，在所述第一阈值水平的情况下，所述促进传输点对应于相对较高的功率水平；并且在所述第二阈值水平的情况下，所述促进传输点对应于较低功率水平。
13.一种用于测量传输点之间的干扰的方法，包括：
在促进传输点处配置一组信道状态信息参考信号(CSI-RS)，用于在测量干扰时使用；
使所述一组CSI-RS与所述促进传输点的至少一个特性相关，其中，所述至少一个特性将所述促进传输点与协作多点(CoMP)群集中的至少一个额外传输点区分开，所述至少一个额外传输点和所述促进传输点两者属于所述协作多点(CoMP)群集；以及
将关于所述一组CSI-RS的信息传达至与所述促进传输点相关联的至少一个用户设备(UE)，以便使所述至少一个UE能够采用所述一组CSI-RS来进行特别对所述CoMP群集中的所述促进传输点的干扰测量。
14.根据权利要求13所述的方法，还包括将所述一组CSI-RS配置为以和所述至少一个额外传输点的几乎空白子帧(ABS)模式的周期性基本上类似的周期性进行传输，以便使干扰测量能够与所述ABS模式相关。
15.根据权利要求14所述的方法，其中，判定所述一组CSI-RS还包括将一组CSI-RS判定为具有第一CSI-RS子集和第二CSI-RS子集，所述第一CSI-RS子集专用于测量所述至少一个额外传输点的所述ABS模式的ABS上的干扰，所述第二CSI-RS子集专用于测量所述至少一个额外传输点的所述ABS模式的非ABS上的干扰。
16.根据权利要求14和15的任一项所述的方法，还包括将所述至少一个UE配置为提供周期性测量报告，其中，所述周期性测量报告包括针对所述第一CSI-RS子集的第一测量的第一测量报告以及针对所述第二CSI-RS子集的第二测量的第二测量报告。
17.根据权利要求14和15所述的方法，还包括在所述至少一个UE处触发非周期性干扰测量，所述至少一个UE被配置为根据所述第一CSI-RS子集和所述第二CSI-RS子集中的哪一个子集在时间上最接近所述非周期性干扰测量的触发而在所述第一CSI-RS子集和所述第二CSI-RS子集之一上执行。
18.根据权利要求13所述的方法，还包括生成所述一组CSI-RS用于以基本上为零的功率进行传输，以便使所述至少一个UE能够将在所述一组CSI-RS上测量的信号归于干扰。
19.根据权利要求13所述的方法，其中，所述至少一个特性包括通过所述促进传输点是否在阈值功率水平以上进行传输而定义的第一特性以及通过所述促进传输点的身份定义的第二特性之一，其中，所述身份与虚拟小区标识和对应于所述促进传输点所属的所述CoMP群集中的传输点的传输点索引的索引值之一相对应。
20.根据权利要求13、14、15、18和19的任一项所述的方法，其中，所述CoMP群集是CoMP情形3群集和CoMP情形4群集之一，所述第一特性。
CN201380013686.1A 2012-03-16 2013-03-15 具有采用公共传输点身份的协作传输点的异构网络的背景下的干扰抑制 Expired - Fee Related CN104170270B (zh)

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