CN105306134A - 用于通过增强型分布式天线系统(eDAS)通信的增强型基站和方法 - Google Patents
用于通过增强型分布式天线系统(eDAS)通信的增强型基站和方法 Download PDFInfo
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Abstract
本申请涉及“<b>用于通过增强型分布式天线系统(</b><b>eDAS</b><b>)通信的增强型基站和方法</b>”。本文一般描述通过增强型分布式天线系统(eDAS)通信的增强型基站和方法的实施例。eDAS包括地理上分离的天线节点,并且每个天线节点具有多个天线元件。基站可以在集中的处理位置对每个天线节点执行物理层基带处理,并且可以使天线节点根据复用方案传送参考信号以便允许用户设备对任意一个或多个天线节点的天线元件执行信道估计。基站还可以使天线节点传送具有同步代码的信号以便允许用户设备与任意一个或多个天线节点的天线元件同步。在一些实施例中,基站可以通过物理层接口与天线节点通信。
Description
本分案申请的母案申请日为2011年8月29日、申请号为201180053799.5、发明名称为“用于通过增强型分布式天线系统(eDAS)通信的增强型基站和方法”。
技术领域
实施例涉及无线通信。一些实施例涉及利用分布式天线系统与用户设备通信的基站。一些实施例涉及根据3GPPLTE演进型通用地面无线电接入网络(E-UTRAN)无线电接入技术(RAT)及其演进操作的网络。一些实施例涉及根据IEEE802.16RAT及其演进操作的WiMAX网络。
背景技术
常规的分布式天线系统是经由在某个地理区域(例如,小区)或结构(室内覆盖)内提供无线服务的传输介质连接到共同源的空间上分离的天线的网络。在蜂窝通信系统中使用常规的分布式天线系统的一个问题是,基站和天线之间的接口不是标准的,从而使得常规的分布式天线系统难以完全支持和利用当前和即将形成的无线标准中的一些高级通信技术的益处。
因此,一般需要可以更完全地支持和更充分地利用当前和即将形成的无线标准中的一些高级通信技术的增强型分布式天线系统和方法来进行通信。
发明内容
根据第一实施例,本发明提供了一种增强型节点B(eNB),包括处理电路,所述处理电路配置成:
通过包括多个地理上分离天线节点的分布式天线系统来与用户设备(UE)通信;
配置所述天线节点以通过传输参考信号和同步信号而用于到所述UE的多点传输,其中所述天线节点中的每个配置成传输所述参考信号中个体能识别的参考信号以供所述UE使用以用于利用所述天线节点中的个体节点来进行信道估计;
配置所述天线节点以在正交资源块中传输下行链路信道以供所述UE接收,
其中每个天线节点配置成在与用于传输所述下行链路信道的其它天线节点的资源块正交的资源块中传输所述下行链路信道。
根据第二实施例,本发明提供了一种用于由增强型节点B(eNB)执行的协调多点传输的方法,所述方法包括:
通过包括多个地理上分离天线节点的分布式天线系统来与用户设备(UE)通信;
配置所述天线节点配置以通过传输参考信号和同步信号而用于到所述UE的多点传输,其中所述天线节点中的每个配置成传输所述参考信号中的个体能识别的参考信号以供所述UE用于利用所述天线节点中的个体节点来进行信道估计;
配置所述天线节点以在正交资源块中传输下行链路信道以供所述UE接收,
其中每个天线节点配置成在与用于传输所述下行链路信道的其它天线节点的资源块正交的资源块中传输所述下行链路信道。
根据第三实施例,本发明提供了一种非暂时性计算机可读存储介质,其存储指令以供一个或多个处理器执行来进行操作以用于在增强型节点B(eNB)处进行的协调多点传输,所述操作包括:
通过包括多个地理上分离天线节点的分布式天线系统来与用户设备(UE)通信;
配置所述天线节点配置以通过传输参考信号和同步信号而用于到所述UE的多点传输,其中所述天线节点中的每个配置成传输所述参考信号中的个体能识别的参考信号以供所述UE用于利用所述天线节点中的个体节点来进行信道估计;
配置所述天线节点以在正交资源块中传输下行链路信道以供所述UE接收,
其中每个天线节点配置成在与用于传输所述下行链路信道的其它天线节点的资源块正交的资源块中传输所述下行链路信道。
附图说明
图1示出根据一些实施例的增强型无线电接入网络(eRAN);
图2示出根据一些实施例的增强型分布式天线系统(eDAS)eDAS网络体系结构;
图3A示出根据一些实施例的同步代码的分割;
图3B示出根据一些实施例的代码结构;
图4示出根据一些实施例的图1的eRAN的各种功能元件;
图5示出根据一些实施例在eDAS基站处执行的下行链路物理层处理;
图6示出根据一些实施例的参考信号复用方案;
图7是根据一些实施例配置成沿列车轨道操作的eDAS基站的实例;以及
图8A、8B和8C示出根据一些实施例的各种天线节点移动性情形。
具体实施方式
以下描述和附图足以说明特定实施例以使得本领域技术人员能够实践它们。其它实施例可以并入结构、逻辑、电、过程和其它改变。一些实施例的部分和特征可以包含在其它实施例的部分和特征中,或者替换其它实施例的部分和特征。权利要求中所阐述的实施例涵盖那些权利要求的所有可用等效物。
图1示出根据一些实施例的增强型无线电接入网络(eRAN)。eRAN100可以包括一个或多个增强型DAS(eDAS)基站102,每个基站102配置成服务于相关联的小区108内的用户设备(UE)112。每个eDAS基站(102)可以利用包括多个地理上分离的天线节点104的增强型分布式天线系统(eDAS)。每个天线节点104可以具有多个空间上分离的天线元件106。至少一些天线节点104不是位于与eDAS基站102相同的位置,而是设置在小区108中的不同位置。
在一些实施例中,eRAN100可以包括与接入网关110通信的寻呼组的至少两个或两个以上eDAS基站102。寻呼组的eDAS基站102可以配置成通过S1接口101与接入网关110通信。寻呼组的eDAS基站102可以配置成直接通过X2+接口109通信。每个eDAS基站102可以作为其相关联的小区108的处理中心操作,并且可以配置成通过物理层X3接口103与天线节点104通信。
根据实施例,eDAS基站102可以使天线节点104根据复用方案传送参考信号以便允许用户设备112对任意一个或多个天线节点104的天线元件106执行信道估计。eDAS基站102还可使天线节点104传送同步代码以便允许用户设备112与任意一个或多个天线节点104的天线元件106同步。
因此,用户设备112可以唯一地标识天线节点104以及任意一个天线节点104的各个天线元件106以便用于信道估计和同步化。如图1所示,一些用户设备112可以由相同小区108内的天线节点104提供服务,而一些用户设备112可以由来自不同小区108的天线节点104提供服务。每个小区108可以与地理区域相关联。
根据实施例,eDAS基站102和天线节点104之间的X3接口103可以标准化,以便允许eDAS基站102完全支持和利用当前和即将形成的无线标准中的一些高级通信技术(例如,单用户(SU)和多用户(MU)多输入多输出(MIMO)(即,SU-MIMO和MU-MIMO)通信技术)的益处。
在一些实施例中,eDAS基站102可以是提供增强特征以便以显著减小的复杂度和功耗提供显著改善的覆盖范围、性能和可靠性的协作型RAN体系结构的一部分。在这些实施例中,在克服穿透和屏蔽损耗时可消耗较少的功率,因为可存在视线信道,从而导致减小的衰落深度和减小的延迟扩展。因此,可以减小用户设备112的传送功率,从而导致更具能量效益的上行链路操作和更低的电池消耗。
在一些实施例中,每个天线元件106可以是独立的天线,并且可以与天线节点104的其它天线元件106有效地分离,以便利用可在每个天线元件106与用户设备的这一个或多个天线之间产生的空间分集性和不同的信道特性。在一些实施例中,天线元件106可以分离多达1/10个波长或更远。
在一些实施例中,eDAS基站102可以是配置成根据3GPPLTEE-UTRAN标准之一(例如,LTE第10版)操作的eDAS增强型节点B(eNB)。在其它实施例中,eDAS基站102可以是配置成根据IEEE802.16标准之一(例如,IEEE802.16m)操作的WiMAX基站。
图2示出根据一些实施例的增强型分布式天线系统(eDAS)eDAS网络体系结构。eDAS基站102可以利用两个或两个以上天线节点104(天线节点Ai和Aj)通过X3接口103与用户设备112通信。如图2所示,每个天线节点104可以包括多个天线元件106(对于天线节点Ai示为Ai1至Ain,对于天线节点Aj示为Aj1至Ajn)。根据实施例,每个小区108(图1)可以包括N个天线节点104,每个天线节点104具有Ni个天线元件106。天线节点Ai可以位于离eDAS基站102距离di并且离天线节点Aj距离dij的位置。eDAS基站102可以具有相当于N×Ni个的天线元件,其中每组Ni个天线元件在物理上分离一定距离,该距离可以基于di和dij进行几何计算。
在这些实施例中,可以在每个天线节点104处通过利用与N×Ni个逻辑天线端口(例如,每个天线元件106一个)相关联的N×Ni个共同参考信号来启用多流开环和闭环SU-MIMO/MU-MIMO方案。在这些实施例中,每个天线节点104可以经由物理层标识符来唯一地标识,这将在下文更详细地加以描述。
图3A示出根据一些实施例的同步代码的分割。根据实施例,由天线节点104(图1)传送的同步代码可以允许用户设备112(图1)与任意一个或多个天线节点(104)的天线元件106同步。同步代码可以分割成包括用于唯一地标识寻呼组、eDAS基站102、以及天线节点104之一的信息字段300。在一些实施例中,同步代码的信息字段300可以包括标识两个或两个以上eDAS基站102的寻呼组的寻呼组ID字段301。信息字段300还可包括标识eDAS基站102的小区ID字段302。信息字段300还可包括标识与eDAS基站102相关联的天线节点104中的单个天线节点的天线节点ID字段304。在一些3GPPLTE实施例中,寻呼组ID字段301可以是eNB组ID字段,小区ID字段302可以是eNBID字段,并且天线节点ID字段304可以是eNB天线节点ID字段。
在图3A所示的实例中,寻呼组ID字段301可以包括N3个位,小区ID字段302可以包括N2个位,并且天线节点ID字段304可以包括N1个位,其中N1+N2+N3=N,并且其中N可以是天线节点104的数量。
图3B示出根据一些实施例的代码结构。由天线节点104(图1)传送的同步代码可以包括具有划分成多个子空间315的代码空间的唯一代码结构310。子空间315可以允许用户设备112(图1)唯一地标识寻呼组、eDAS基站102(图1)和特定天线节点104(图1)。在一些实施例中,代码结构可以包括2N个不同同步代码的代码序列。
上述多个子空间315可以包括用于标识eRAN100(图1)的每个寻呼组的多个寻呼组子空间311。每个寻呼组子空间311可以与一个寻呼组相关联,并且包括多个eNB子空间312。每个eNB子空间312可以与寻呼组的eDAS基站102之一相关联,并且每个eNB子空间312可以具有多个天线节点子空间304。每个天线节点子空间314可以与eDAS基站102的一个天线节点104相关联。
在一些实施例中,不同同步代码的集合310可以包括一组或一族2N个不同同步代码,其中N可以是同步代码序列的大小。在图3B所示的实例中,2N个代码的代码空间可以分割成2N/2N3个子空间311,并且每个子空间311还可划分成2N3/2N2个子空间312。每个子空间312还可划分成2N2/2N1个子空间314。这种序列分割可帮助用户设备112检测和解码信息字段300。
图3A和3B中示出的实例分割和代码结构允许eDAS基站102通过将用户设备112从一个天线节点104或一组天线节点104切换到另一组而提供小区108内的移动性管理。用户设备112可以基于参考信号601测量和报告从每个天线节点接收的信号强度。然后,eDAS基站102可以从在地理上更靠近用户设备112的另一个天线节点104或另一组天线节点104重定向信号。不同于常规的蜂窝系统,天线节点104之间的小区内切换和移动性管理可以通过将X3接口103上的传输从初始天线节点104重定向至目标天线节点104来执行,这是因为基带处理是在eDAS基站102内执行的。因此,eDAS小区108内的移动性管理可以减少为用户设备112基于来自用户设备112的信号质量测量报告进行“数据和控制路径”选择。
图4示出根据一些实施例的图1的eRAN的各种功能元件。接入网关110可以包括移动性管理实体(MME)402、分组数据网络网关(P-GW)404和用于执行包括提供到IP网络的接入的常规网关功能的服务网关(S-GW)406。在一些实施例中,接入网关110可以根据LTE演进型分组核心(EPC)规范来配置,以便提供多兆位带宽能力、等待时间减少和改善的移动性。eDAS基站102可以通过核心网络接口(例如,S1接口101)与接入网关110通信。
在一些实施例中,eDAS基站102可以利用软件定义的无线电(SDR)基带处理池,它包括配置成执行本文描述的各种操作的多个处理器。每个eDAS基站102可以作为其相关联的小区108的处理中心操作,并且可以配置成通过物理层X3接口103与天线节点104通信。
X3接口103可以包括光纤链路和同轴链路中的至少一种,以便将每个天线节点104耦合到基带处理池。在一些实施例中,X3接口103可以将每个天线节点104的RF前端耦合到eDAS基站102的RF前端。在这些实施例中,X3接口可以配置成在每个天线104的天线元件106与eDAS基站102之间传送RF信号。在一些备选实施例中,X3接口配置成在每个天线104的天线元件106与eDAS基站102之间传送基带信号。但是,基带处理可以在eDAS基站102的集中处理位置处执行。X3接口可以包括在RF或基带级操作的任何宽带宽连接。
在一些实施例中,eDAS基站102可以配置成在用户设备112的天线节点104之间执行移动性管理,并且通过X3接口利用协作型通信来为用户设备112在相同小区108的天线节点104之间执行软和硬切换。在协调多点(CoMP)实施例中,eDAS基站102还可配置成在不同小区的天线节点104之间执行切换。
尽管图中将eDAS基站102、接入网关110和天线节点104示为具有若干个独立的功能元件,但是其中一个或多个功能元件可以组合,并且可以由软件配置的元件(例如,包括数字信号处理器(DSP)的处理元件)和/或其它硬件元件的组合来实现。例如,一些元件可以包括一个或多个微处理器、DSP、专用集成电路(ASIC)、射频集成电路(RFIC)、以及用于至少执行本文所描述的功能的各种硬件和逻辑电路的组合。在一些实施例中,eDAS基站102、接入网关110和天线节点104的功能元件可以指在一个或多个处理元件上操作的一个或多个进程。
实施例可以在硬件、固件和软件之一或其组合中实现。实施例还可作为存储在计算机可读存储装置上的指令来实现,这些指令可以由至少一个处理器读取和执行以便执行本文所描述的操作。计算机可读存储装置可以包括用于存储以机器(如计算机)可读形式的信息的任何非瞬时机构。例如,计算机可读存储装置可以包括只读存储器(ROM)、随机存取存储器(RAM)、磁盘存储介质、光存储介质、闪速存储器装置以及其它存储装置和介质。在一些实施例中,eDAS基站102可以包括一个或多个处理器,并且可以用存储在计算机可读存储装置上的指令来配置。
图5示出根据一些实施例在eDAS基站处执行的下行链路物理层(PHY层)处理。如上所述,eDAS基站102(图1)可以作为其相关联的小区108(图1)的处理中心进行操作,并且可以配置成通过X3接口103(图1)与天线节点104(图1)通信。
根据实施例,每个eDAS基站102可以对每个天线节点104执行独立的物理层处理,并通过X3接口103将物理层信号传送到天线节点104。在图5所示的实例中,每个eDAS基站102可以执行每个天线节点调制和编码自适应502。每个eDAS基站102还可执行每个天线节点MIMO处理504以及每个天线节点天线和资源映射506。这些物理层处理操作可以生成物理层信号508以便通过X3接口103传送到天线节点104。在所示的实例中,可以通过X3接口103将物理层信号508A传送到第一天线节点104,并通过X3接口103将物理层信号508B传送到第二天线节点104。尽管图5示出,物理层信号508是OFDM信号,但这不是必要条件。
根据这些实施例,在eDAS基站102(而不是在天线节点104)处执行基带处理。这可允许在用于由相同eDAS基站102提供服务的天线节点104的处理块中实现硬件共享。尽管图5可暗示物理处理要乘以由eDAS基站102提供服务的天线节点104的数量,但是实际上可以通过重新配置功能块的参数来共享或再利用相同的传输链。在图5所示的实例中,可以每个天线节点调适(adapt)传输格式与调制和编码方案,以便允许根据用户设备112与每个天线节点104之间的信道状况对传输参数进行链路级调适。此外,可以每个天线节点104个别地调适MIMO模式和编码方案以及层映射和资源映射。
在eDAS基站102处对天线节点104执行基带处理允许eDAS基站102通过共同调整协调传输中所涉及的天线节点104的MIMO编码参数来执行来自对应于相同eDAS基站102的多个天线节点104的eDAS基站102内协调传输。
在一些实施例中,eDAS基站102配置成根据SU-MIMO和MU-MIMO通信技术来传送多流传输。在这些实施例中,可以在eDAS基站102处执行多流处理以及SU-MIMO和MU-MIMO处理,并且可以通过X3接口103将信号传送到选定的天线节点104。在一些实施例中,可以使用两个或两个以上天线节点104来进行SU-MIMO和MU-MIMO传输。在一些实施例中,从用户设备112接收的信号质量报告、信道状态信息(CSI)或预编码矩阵索引(PMI)可以供eDAS基站102作为闭环MIMO通信技术的一部分使用。在一些实施例中,也可以利用开环MIMO通信技术。
尽管图5示出对传送器侧执行的物理层处理,但是eDAS基站102也可以配置成对接收侧执行类似的每个天线节点物理层处理。因此,可以类似地共享与小区108的天线节点104相关联的功能接收侧组件。
图6示出根据一些实施例的参考信号复用方案600。根据实施例,DAS基站102(图1)可以配置成使天线节点104(图1)根据复用方案600传送参考信号601以便允许用户设备112(图1)对任意一个或多个天线节点104的天线元件106(图1)执行信道估计。
用于传送参考信号601的复用方案600可以包括码分复用(CDM)、时分复用(TDM)和频分复用(FDM)的组合(即,CDM/TDM/FDM方案)以便允许用户设备112唯一地标识与任意一个或多个天线节点104的各个天线元件106相关联的参考信号以用于信道估计。
在一些实施例中,与eDAS基站102相关联的每个天线节点104可以配置成利用不同的CDM代码602进行传送。相同天线节点104的天线元件106配置成利用共同的CDM代码602来传送它们的参考信号。相同天线节点104的天线元件106还可配置成在正交频分复用(OFDM)符号内的不同时间604以及在OFDM资源块606的不同副载波频率606上传送参考符号601,如图6所示。
如图6进一步所示,由于可以利用不同的CDM代码来传送由每个天线节点104传送的参考信号601,所以每个天线节点104可以在相同的时间604以及在相同的副载波频率606上传送参考符号601。在这些实施例中,码分复用、时分复用和频分复用的参考符号601的使用提供了对与任何特定天线节点104相关联的每个天线元件106的唯一标识。
此外,为了执行信道估计以便实现检测和解调的目的、执行信道状态信息和信道质量测量以便进行MIMO模式选择和等级自适应,用户设备112能够利用这些参考信号601来估计到和来自每个天线元件106的信道。参考信号601可以是共同参考信号,或者可以是UE特定的。
在一些实施例中,由于每个天线节点104的天线元件106的数量以及eDAS基站102的天线节点104的数量可能会很大(例如,大于1000),所以码分复用、时分复用和频分复用的组合可有助于防止过度的第一层开销,并且还有助于防止在高移动性状况过程中或者由于信道的频率选择性而导致的代码正交性的潜在损失。在没有CDM的情况下使用FDM/TDM参考信号可导致过度的第一层开销和系统的整体性能的降级。在没有FMD或TDM的情况下使用CDM参考信号可导致在高移动性状况过程中或者由于信道的频率选择性而导致的代码正交性的潜在损失。
如图6所示,通过将每个CDM/FDM/TDM代码指派给一个天线元件,天线节点104的天线元件106可以由从那个天线元件传送的唯一参考信号601来标识。参考信号601可以利用资源块606内的数据副载波进行时分复用和/或频分复用。在一些实施例中,取决于参考信号是UE特定的还是共同参考信号(即,共同窄带参考信号或共同宽带参考信号),参考信号601可以在子带或整个频段内利用资源块606内的数据副载波进行时分复用和/或频分复用。
因此,由于用户设备112可以区分从每个天线元件106以及从每个天线节点104传送的参考信号,所以除了别的以外,用户设备112还能够执行MIMO信道估计以便实现改善的SU-MIMO或MU-MIMO通信。
根据一些实施例,eDAS基站102可以从用户设备112接收信号质量报告,信号质量报告唯一地标识天线节点104之一,并且包括用户设备112从天线节点104接收的信号的信号质量信息。用户设备112可以将它从其接收信号的每个天线节点104的信号质量报告传送到eDAS基站102以便供eDAS基站102使用。因此,eDAS基站102可以通过X3接口103将信号引导至合适的天线节点104。在这些实施例中,用户设备112能够基于根据复用方案600传送的参考信号601对天线节点104的一个或多个天线元件106执行信道估计。
信号质量报告可以基于信道估计。在一些实施例中,信号质量报告可以包括对以下至少一种的指示:接收信号强度指示符(RSSI)、一些3GPPLTE实施例中的参考信号接收功率(RSRP)、载波干扰加噪声比(CINR)、或从指示的天线节点104接收的与参考信号相关联的其它信号质量参数或路径损耗测量。在一些实施例中,用户设备112可以配置成基于由天线节点104传送的参考信号的信号质量信息在两个或两个以上天线节点104中选择天线节点104。
因此,由于用户设备112配置成唯一地标识天线节点104,所以eDAS基站102可以利用可能最靠近用户设备112(例如,具有最佳信号特性)的一个或多个天线节点104与用户设备112通信,以便允许用户设备112以减小的传输功率级通信,从而可以减少用户设备112的功率消耗。此外,还可改善信号质量和吞吐量。
在一些实施例中,由用户设备112传送的信号质量报告可以标识寻呼组ID、小区ID以及用于标识从其接收参考信号的特定天线节点104的天线节点ID。在这些实施例中,信号质量报告可以提供与用户设备112从特定天线节点104接收的信号相关联的信号质量信息。因此,每个信号质量报告可以与特定天线节点104相关联。
图7是根据一些实施例配置成沿列车轨道操作的eDAS基站的实例。eDAS基站702可以通过X3接口与天线节点704通信以便在小区内提供通信服务。天线节点704可以沿列车轨道708布置。根据实施例,天线节点704可以在空间上分离,并且可以设置在小区的不同地理位置(即,沿列车轨道708)。eDAS基站702可以配置成在集中的处理位置对每个天线节点704执行物理层基带处理。eDAS基站702还可配置成通过在例如列车沿轨道708运动时将X3接口上的物理层信号从一个天线节点104重定向至下一个天线节点104来在天线节点704之间执行小区内切换。eDAS基站702可以配置成与eDAS基站102(图1)类似。
图8A、8B和8C示出根据一些实施例的各种天线节点移动性情形。在图8A中,示出单天线节点eNB内移动性。在图8B中,示出多天线节点eNB内移动性。如图所示,地理上分离的天线节点804设置在由eDASeNB802提供服务的不同地理位置。在这些实施例中,其中eDASeNB802配置成在集中的处理位置对每个天线节点804执行物理层基带处理,并通过将X3接口上的物理层信号从初始天线节点804重定向至目标天线节点804来在天线节点804之间执行小区内切换。
在图8C中,示出多天线节点eNB间移动性。在这些实施例中,在RAN的两个eDASeNB802之间执行eNB间切换。在这些实施例中,可以通过诸如X2+接口109(图4)的X2+接口来在这两个DASeNB802之间直接协调切换。
提供摘要是为了符合37C.F.R.Section1.72(b)要求提供摘要的规定,以便允许阅读者能够确定技术公开的本质和要旨。提交时要了解,它不是用于限制或解释权利要求的范围或含义。随附权利要求由此并入到详细描述中,其中每个权利要求独立代表单独的实施例。
Claims (20)
1.一种增强型节点B(eNB),包括处理电路,所述处理电路配置成:
通过包括多个地理上分离天线节点的分布式天线系统来与用户设备(UE)通信;
配置所述天线节点以通过传输参考信号和同步信号而用于到所述UE的多点传输,其中所述天线节点中的每个配置成传输所述参考信号中个体能识别的参考信号以供所述UE使用以用于利用所述天线节点中的个体节点来进行信道估计;
配置所述天线节点以在正交资源块中传输下行链路信道以供所述UE接收,
其中每个天线节点配置成在与用于传输所述下行链路信道的其它天线节点的资源块正交的资源块中传输所述下行链路信道。
2.如权利要求1所述的eNB,其中所述多点传输是协调多点传输,其中包括所述下行链路信道的正交资源块在相同子帧内由地理上分离天线节点中的不同节点同时传输。
3.如权利要求2所述的eNB,其中所述下行链路信道是共享下行链路信道,并且
其中所述分布式天线系统是增强型分布式天线系统(eDAS)。
4.如权利要求1所述的eNB,其中所述地理上分离天线节点包括准同定位的服务小区的天线端口。
5.如权利要求4所述的eNB,其中所述同步信号配置成允许所述UE与所述天线节点中的每个同步,并且
其中所述同步信号定位在相同子帧中并且配置成允许所述UE识别小区身份组号。
6.如权利要求5所述的eNB,其中所述参考信号包括小区特定参考信号和UE特定参考信号并且配置成允许所述UE识别所述eNB和所述天线节点中的每个。
7.如权利要求6所述的eNB,其中所述多个地理上分离天线节点中的每个具有多个天线元件。
8.如权利要求6所述的eNB,其中所述eNB进一步设置成
配置所述天线节点中的至少一些以用于根据协调多点传输技术进行单用户(SU)多输入多输出(MIMO)(SU-MIMO)或多用户(MU)MIMO(MU-MIMO)传输;
在从所述UE接收信道状态信息和预编码矩阵索引时执行闭环MIMO通信技术,以及
在未从所述UE接收信道状态信息和预编码矩阵索引时执行开环MIMO通信技术。
9.如权利要求6所述的eNB,其进一步配置成在集中处理位置处对所述天线节点中的每个进行物理层基带处理。
10.如权利要求6所述的eNB,其中所述eNB进一步设置成基于由所述UE提供的信道质量指示符来选择所述天线节点中的至少两个或以上以用于传输所述下行链路信道。
11.一种用于由增强型节点B(eNB)执行的协调多点传输的方法,所述方法包括:
通过包括多个地理上分离天线节点的分布式天线系统来与用户设备(UE)通信;
配置所述天线节点配置以通过传输参考信号和同步信号而用于到所述UE的多点传输,其中所述天线节点中的每个配置成传输所述参考信号中的个体能识别的参考信号以供所述UE用于利用所述天线节点中的个体节点来进行信道估计;
配置所述天线节点以在正交资源块中传输下行链路信道以供所述UE接收,
其中每个天线节点配置成在与用于传输所述下行链路信道的其它天线节点的资源块正交的资源块中传输所述下行链路信道。
12.如权利要求11所述的方法,其中所述多点传输是协调多点传输,其中包括所述下行链路信道的正交资源块在相同子帧内由地理上分离天线节点中的不同节点同时传输。
13.如权利要求12所述的方法,其中所述下行链路信道是共享下行链路信道,并且
其中所述分布式天线系统是增强型分布式天线系统(eDAS)。
14.如权利要求11所述的方法,其中所述地理上分离天线节点包括准同定位的服务小区的天线端口。
15.如权利要求14所述的方法,其中所述同步信号配置成允许所述UE与所述天线节点中的每个同步,
其中所述同步信号定位在相同子帧中并且配置成允许所述UE识别小区身份组号,并且
其中所述参考信号包括小区特定参考信号和UE特定参考信号并且配置成允许所述UE识别所述eNB和所述天线节点中的每个。
16.如权利要求15所述的方法,其进一步包括:
配置所述天线节点中的至少一些以用于根据协调多点传输技术进行单用户(SU)多输入多输出(MIMO)(SU-MIMO)或多用户(MU)MIMO(MU-MIMO)传输;
在从所述UE接收信道状态信息和预编码矩阵索引时执行闭环MIMO通信技术,以及
在未从所述UE接收信道状态信息和预编码矩阵索引时执行开环MIMO通信技术。
17.如权利要求14所述的方法,其进一步包括在集中处理位置处对所述天线节点中的每个进行物理层基带处理。
18.如权利要求14所述的方法,其进一步包括基于由所述UE提供的信道质量指示符来选择所述天线节点中的至少两个或以上以用于传输所述下行链路信道。
19.一种非暂时性计算机可读存储介质,其存储指令以供一个或多个处理器执行来进行操作以用于在增强型节点B(eNB)处进行的协调多点传输,所述操作包括:
通过包括多个地理上分离天线节点的分布式天线系统来与用户设备(UE)通信;
配置所述天线节点配置以通过传输参考信号和同步信号而用于到所述UE的多点传输,其中所述天线节点中的每个配置成传输所述参考信号中的个体能识别的参考信号以供所述UE用于利用所述天线节点中的个体节点来进行信道估计;
配置所述天线节点以在正交资源块中传输下行链路信道以供所述UE接收,
其中每个天线节点配置成在与用于传输所述下行链路信道的其它天线节点的资源块正交的资源块中传输所述下行链路信道。
20.如权利要求19所述的非暂时性计算机可读存储介质,其中所述多点传输是协调多点传输,其中包括所述下行链路信道的正交资源块在相同子帧内由所述地理上分离天线节点中的不同节点同时传输。
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