CN105027469A - 针对长期演进（lte）的虚拟载波检测机制 - Google Patents

针对长期演进（lte）的虚拟载波检测机制 Download PDF

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CN105027469A
CN105027469A CN201480011258.XA CN201480011258A CN105027469A CN 105027469 A CN105027469 A CN 105027469A CN 201480011258 A CN201480011258 A CN 201480011258A CN 105027469 A CN105027469 A CN 105027469A
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transmission
confirmation
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CN105027469B (zh
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阿列克谢·达维多夫
威蒂姆·瑟格耶夫
格雷戈里·摩罗佐维
阿波斯托洛斯·帕帕萨娜西欧
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Apple Inc
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Intel IP Corp
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  • Computer And Data Communications (AREA)

Abstract

这里总地描述了用于提供针对LTE的虚拟载波检测的实施例。在一些实施例中，第一演进节点B(eNB)在下行链路中向第一UE发送后续DL传输的通知。在上行链路中，第一UE发送对所接收的DL通知的确认。第二eNB偷听该确认，解码该确认，并且提取第一eNB计划使用的DL资源的信息。如果第二eNB并没有在所指示的DL资源中进行发送，则第二eNB将所指示的DL资源标记为忙，并且抑制在这些资源中进行发送。第二eNB随后可以使用替代资源重新安排它的传输，从而使得来自第二eNB1的干扰可以被避免。

Description

针对长期演进（LTE）的虚拟载波检测机制
要求优先权
本申请要求于2013年12月26日递交的美国专利申请No.14/141,179的优先权，其中该美国专利申请要求于2013年4月4日递交的美国临时专利申请No.61/808,597的优先权，这两个申请中的每个申请通过引用被全部结合于此。
背景技术
在10GHz以下工作的蜂窝通信系统中，尤其是在LTE中主要的性能限制因素是干扰。在下行链路中，干扰是由相邻的基站(BS)/演进节点B(eNB)的传输导致的。为了减少下行链路中的干扰，目前的方法是协调多个小区中的eNB的传输，从而使得这些小区不影响、或者至少较少影响相邻小区中的用户的接收。
LTE在CoMP(协同多点)规范中提供了用于这种协调的多种机制。但是，这种协调使用了被协调的eNB之间的回程链路。例如，使用协调eNB之间的回程连通性的当前干扰协调机制在连接不存在的情况下、在回程链路延迟出现问题的情况下、或者在回程链路不具有充足吞吐性能的情况下失效。在这些情况下，CoMP方法失效。干扰问题对于小小区的部署有更大影响，因为存在大量的小小区eNB(SC-eNB)并且运营商无法提供他们之间的预定的回程连通性。
附图说明
图1示出了根据实施例的无线网络；
图2示出了根据实施例的提供针对LTE的虚拟载波检测的方法的流程图；
图3是示出根据实施例的基于针对LTE的虚拟载波检测提供通知的方法的消息流示意图；
图4是示出根据实施例的基于针对LTE的虚拟载波检测提供对通知的确认的方法的消息流示意图；
图5示出了根据实施例的演进节点B(eNB)；以及
图6示出了根据实施例的提供针对LTE的虚拟载波检测的示例机器的框图。
具体实施方式
下面的描述和附图充分阐述了使得本领域技术人员能够实施的具体实施例。其他实施例可以包括结构、逻辑、电子、处理、以及其他改变。一些实施例的部分和特征可以被包括在其他实施例中，或者可以被其他实施例中的部分和特征替代。权利要求中阐述的实施例覆盖了这些权利要求的可用等同。
根据实施例，提供了一种在eNB之间的连通性较差时协调来自相邻eNB的干扰的机制。类似于WiFi中使用的虚拟载波检测，在相邻小区中检测潜在的下行链路传输。根据实施例的干扰缓解可以通过协调不具有回程链路的eNB实现。因此，根据实施例的干扰缓解更加鲁棒，并且提供了甚至对于简单部署的系统性能改善。
在网络中，当从多个站点到相同或不同站点的同时传输相互干扰从而变得无法解码时，会出现无线电帧冲突。为了减少网络中的无线电帧冲突的数目，在发送具有数据有效载荷的大帧之前，使用短控制帧的交换。存在分别由期望传输的发起方和接收方发送的请求发送(RTS)帧和允许发送(CTS)帧。这些帧中的每个帧都包含传输将占用的时间间隔的指示。因此，发起方和接收方周围的站点变得知晓期望传输，并且对所指示的时段保持静默，这使得通信将被成功发送。
图1示出了根据实施例的无线网络100。在图1中，演进节点B(即，eNB1 110)是归属小区，并且eNB2 120是干扰小区。UE2 122受到来自eNB1 110的干扰114，并且UE1 112受到来自eNB2 120的干扰124。干扰问题在具有小小区的网络中更是问题(因为存在大量小小区eNB(SC-eNB))。本领域技术人员将认识到，术语eNB可以被用来指代基站收发信台(BTS)、演进节点B(eNB)、小小区演进节点B(SC-eNB)等。基站收发信台(BTS)也可以指代无线电基站(RBS)、节点B(在第三代(3G)网络中)、或者基站(BS)。但是，为了清楚，这里将使用eNB。LTE使用被协调的eNB 110、120之间的回程链路130，使用CoMP(协同多点)规范来提供eNB 110、120之间的协调。eNB 110、120可以通过回程链路130被连接到无线电网络控制器(RNC)140。但是，本领域技术人员将认识到，eNB(即，eNB1 110和eNB2 120)可以包括控制器，因此RNC 140可以不被提供。由协调eNB 110、120之间的回程链路130提供的连通性在连接不存在的情况下、在与回程链路130相关联的延迟出现问题的情况下、或者在回程链路130不具有充足吞吐量性能的情况下失效。在这些情况下，CoMP方法失效。由于使用了大量小小区eNB(SC-eNB)并且运营商无法在它们之间提供预定的回程连通性，干扰114、124对于具有小小区的部署影响更大。
图2是示出根据实施例的提供针对LTE的虚拟载波检测的方法的流程图200。在LTE中使能下行链路干扰协调例如包括：干扰eNB2知晓归属小区中的从eNB1到UE 1的潜在的下行链路传输，其中该归属小区由eNB1提供。为了实现该目的，eNB 1在下行链路210中向UE 1发送后续DL传输的通知。该通知包括有多少子帧将被后续传输使用、以及哪些频率资源、物理资源块(PRB)将被使用的信息。通知可以在下行链路控制信息(DCI)字段中被发送，以使能UE 1在例如最多4个子帧中快速处理该通知。eNB2不会收听该通知，因为eNB2也在相同时频资源中进行发送。在上行链路中，UE 1发送对所接收的DL通知220的确认。在该确认中，UE 1包括eNB1计划在向UE 1发送数据时使用的DL帧资源的信息。
由于UE 1在上行链路资源中发送其确认，所以eNB2可以偷听到该确认，对其进行解码并提取eNB 1计划使用的DL资源的信息(230)。判断eNB2是否已经正在所指示的DL资源中进行发送(240)。如果不是(242)，eNB2将所指示的DL资源标记为忙，并且抑制在这些资源中进行发送(250)。如果是(244)，则判断eNB是否将要自己占用这些资源来向UE 2发送数据(260)。如果不是(262)，则eNB2不将传输重新安排到替代资源(270)。如果是(264)，则eNB2使用替代资源重新安排传输，从而使得对eNB到UE 1的传输的干扰被避免(280)。
图3是示出根据实施例的基于针对LTE的虚拟载波检测提供通知的方法的消息流示意图300。在图3中，两个eNB被示出：eNB1 310和eNB2320。eNB1 310和eNB2 320可以根据第三代合作伙伴计划(3GPP)LTE/LTE-A(长期演进/高级长期演进)或者其他适当的无线广域网(WWAN)协议进行操作，并且可以包括在操作中提供与演进分组核心(EPC)360的无线网络通信用于向互联网协议(IP)网络370传送数据的配置。eNB1 310和eNB2 320二者计划根据它们的计划向他们各自的UE(UE 1 312和UE 2 322)进行发送，并且传输将在频率上重叠。eNB1 310向UE 1 312发送通知330。潜在的eNB/UE1传输340被示出为与计划的eNB2/UE2传输350重叠。
图4是示出根据实施例的基于针对LTE的虚拟载波检测提供对通知的确认的方法的消息流示意图400。在图4中，UE 1 412向eNB1 410发送确认460。eNB1 410和eNB2 420可以在操作中再次提供与演进分组核心(EPC)460的无线网络通信，用于向互联网协议(IP)网络470传送数据。但是，eNB2 420会偷听到由UE 1 412发送的确认480。eNB2 420因此可以重新安排其计划的到UE 2 422的传输。重新安排eNB/UE2传输450不与潜在的eNB1/UE 1传输440重叠。
图5示出了根据实施例的演进节点B(eNB)500。eNB 500包括至少一个无线电发射器510、接收器512、天线系统514、控制部件516、存储器518、以及电源520。eNB 500的控制部件516可以包括控制器530。控制器可以被布置为提供资源管理和逻辑控制功能，以使eNB直接相互通信。
eNB 500的控制器530还可以提供包括无线电资源管理(RRM)、无线电承载控制、无线电接纳控制(接入控制)、连接移动性管理、UE与eNB无线电之间的资源调度、调度并发送消息(进入的呼叫和连接请求)、广播信息协调(系统信息)、以及测量报告在内的功能(以帮助做出切换决策)。控制器530还被布置为向一个或多个UE发送PDSCH数据和DM-RS。在接收到来自一个或多个UE的CQI反馈时，控制器530被布置为应用和/或调整MSC并且将所应用的和/或调整后的MCS包括到下一个PDSCH。
在替代实施例中，eNB 500可以作为独立设备进行操作，或者可以连接到(例如，联网)到其他机器。控制器530能够执行指定eNB 500将采取的动作的指令(顺序或者其他)。另外，尽管示出了单个控制器530，但是术语“控制器”也应该被看作单独或者联合执行一组或多组指令以执行这里讨论的任意一个或多个方法的任何机器集合。在一个示例中，一个或多个控制器530或者一个或多个计算机系统(例如，单独的客户端或服务器计算机系统)的至少一部分可以被固件或者软件(例如，指令、应用部分、或者应用)配置为执行指定操作的模块。在一个示例中，软件可以驻留在至少一个机器可读介质上。在一个示例中，软件在被模块的底层硬件执行时使得硬件执行所规定的操作。
至少一个机器可读介质580可以被用来存储具体化这里描述的任意一个或多个技术或功能或者被这里描述的任意一个或多个技术或功能利用的一组或多组数据结构或指令582(例如，软件)。指令582也可以至少部分地驻留在诸如存储器518之类的附加的机器可读存储器上，或者驻留在控制器530内(在被eNB 500执行期间)。在一个示例中，控制器530、存储器518等中的一个或者任意组合可以构成机器可读媒介。尽管机器可读介质580被示出为单个介质，但是术语“机器可读介质”可以包括被配置为存储一个或多个指令582的单个介质或者多个媒介(例如，集中式或者分布式数据库、和/或相关联的高速缓存和服务器)。
术语“机器可读介质”可以包括能够存储、编码、或者承载由eNB500执行、并且促使eNB 500执行本公开的任意一个或多个技术的指令、或者能够存储、编码、或者承载这些指令所使用的数据结构或者与这些指令相关联的数据结构的任何介质。非限制性的机器可读介质示例可以包括固态存储器、光和磁媒介。机器可读媒介的具体示例可以包括：诸如半导体存储器设备(例如，电可编程只读存储器(EPROM)、电可擦除可编程只读存储器(EEPROM))、以及闪存设备之类的非易失性存储器；诸如内置硬盘和可移除盘之类的磁盘；磁-光盘；以及CD-ROM和DVD-ROM盘。指令582还可以被利用多个传输协议(例如，帧中继、互联网协议(IP)、传输控制协议(TCP)、用户数据报协议(UDP)、超文本传输协议(HTTP)等)中的任意一个传输协议在总线552上发送或者接收。
图6示出了根据可以执行这里讨论的任意一种或多种技术(例如，方法)的实施例的用于提供针对LTE的虚拟载波检测机制的示例机器600的框图。在替代实施例中，机器600可以作为单独设备操作或者可以被连接(例如，联网)到其他机器。在联网部署中，机器600可以作为服务器-客户端网络环境中的服务器机器和/或客户端机器进行操作。在一个示例中，机器600可以充当对等(P2P)(或其他分布式)网络环境中的对等机器。机器600可以是个人计算机(PC)、平板PC、机顶盒(STB)、个人数字助理(PDA)、移动电话、网络设备、网络路由器、交换机或网桥、或者能够执行指定将被该机器采取的动作的指令(顺序或者其他)的任何机器。另外，尽管示出了单个机器，但是术语“机器”应该被认为包括单独或者联合执行一组或多组指令以执行这里讨论的一种或多种方法的任何机器的集合(诸如，云计算、软件即服务(SaaS)、其他计算机集群配置)。
这里描述的示例可以包括或者可以在逻辑、或者多个组件、模块、或者机制上进行操作。模块是能够执行指定操作并且可以被以某种方式进行配置或布置的有形实体(例如，硬件)。在一个示例中，电路可以被以指定方式布置(例如，在诸如其他电路之类的外部实体内部或者相对于这些外部实体)为模块。在一个示例中，一个或多个硬件处理器602或者一个或多个计算机系统(例如，单独的客户端或者服务器计算机系统)的至少一部分可以被固件或者软件(例如，指令、应用部分、或者应用)配置为进行操作以执行指定操作的模块。在一个示例中，软件可以驻留在至少一个机器可读介质上。在一个示例中，软件在被模块的底层硬件执行时使得硬件执行指定操作。
因此，术语“模块”被理解为覆盖有形实体，该有形实体是被物理构造，具体地被配置(例如，硬连线)或者临时(例如，暂时)被配置(例如，被编程)为以指定方式进行操作或者执行至少一部分这里描述的任何操作的实体。考虑模块被临时配置的示例，模块不需要在时间上的任意一个时刻被实例化。例如，在模块包括使用软件配置的通用硬件处理器602的情况下，该通用硬件处理器可以在不同的时间被配置为相应的不同模块。因此，软件可以配置硬件处理器，例如在一个时间时刻构成特定模块并且不同的时间时刻构成不同模块。术语“应用”或者其变体被广泛地用来包括例程、程序模块、程序、组件等，并且可以在包括单处理器或多处理器系统、基于微处理器的电子单核或多核系统、或者它们的组合等在内的各种系统配置上被实现。因此，术语“应用”可以被用来指代软件的实施例、或者被布置为执行这里描述的任何操作的至少一部分的硬件。
机器(例如，计算机系统)600可以包括硬件处理器(例如，中央处理单元(CPU)、图形处理单元(GPU)、硬件处理器核心、或者它们的任意组合)602、主存储器604、以及静态存储器606，它们中的至少一些可以经由连结(例如，总线)608与其他部分通信。机器600还可以包括显示单元610、字母数字输入设备612(例如，键盘)、以及用户界面(UI)导航设备614(例如，鼠标)。在一个示例中，显示单元610、输入设备612、以及UI导航设备614可以是触摸屏显示器。机器600还可以包括存储设备(例如，驱动单元)616、信号生成设备618(例如，扬声器)、网络接口设备620、以及诸如全球定位系统(GPS)传感器、指南针、加速度传感器或者其他传感器之类的一个或多个传感器621。机器600可以包括诸如串行(例如，通用串行总线(USB))、并行、或者其他有线或无线(例如，红外(IR))连接之类的输出控制器628，以与一个或多个外围设备(例如，打印机、读卡器等)通信或者控制这些外围设备。
存储设备616可以包括至少一个机器可读介质622，其上存储有具体化这里描述的任意一个或多个技术或功能或者被这里描述的任意一个或多个技术或功能利用的一组或多组数据结构或指令624(例如，软件)。指令624还可以至少部分地驻留在诸如主存储器604、静态存储器606、或者硬件处理器602(在被机器600执行期间)之类的附加机器可读存储器处。在一个示例中，硬件处理器602、主存储器604、静态存储器606、或者存储设备616之一或者它们的任意组合可以构成机器可读媒介。
尽管机器可读介质622被示出为单个介质，但是术语“机器可读介质”可以包括被配置为存储一个或多个指令624的单个介质或者多个媒介(例如，集中式或者分布式存储器、和/或相关联的高速缓存和服务器)。
术语“机器可读介质”可以包括能够存储、编码、或者承载由机器600执行、使得机器600执行本公开的任意一种或多种技术的指令、或者能够存储、编码、或者承载被这些指令使用或者与这些指令相关联的数据结构的任何介质。非限制性的机器可读介质示例可以包括固态存储器、以及光磁媒介。机器可读媒介的具体示例可以包括：诸如半导体存储器设备(例如，电可编程只读存储器(EPROM)、电可擦除可编程只读存储器(EEPROM))和闪存设备之类的非易失性存储器；诸如内部硬盘和可移除盘之类的磁盘；磁-光盘；以及CD-ROM和DVD-ROM盘。
指令624还可以利用多个传输协议(例如，帧中继、互联网协议(IP)、传输控制协议(TCP)、用户数据报协议(UDP)、超文本传输协议(HTTP)等)中的任意一个传输协议，经由网络接口设备620使用传输介质在通信网络626上被发送或接收。示例通信网络可以包括局域网(LAN)、广域网(WAN)、分组数据网(例如，互联网)、移动电话网(例如，包括码分多址(CDMA)、时分多址(TDMA)、频分多址(FDMA)、以及正交频分多址(OFDMA)在内的信道接入方法)、蜂窝网络(诸如，全球移动通信系统(GSM)、通用移动通信系统(UMTS)、CDMA 20001x*标准和长期演进(LTE)、简易老式电话(POTS)网络)、以及无线数据网络(例如，包括电子电气工程师协会(IEEE)802.11标准(WiFi)、IEEE 802.16标准以及其他的IEEE 802标准族)、对等(P2P)网络、或者现在已知或者以后开发的其他协议。
例如，网络接口设备620可以包括一个或多个物理插座(例如，以太网、同轴、或者电话插座)、或者一个或多个天线，以连接到通信网络626。在一个示例中，网络接口设备620可以包括多个天线，以使用单输入多输出(SIMO)、多输入多输出(MIMO)、或者多输入单输出(MISO)技术中的至少一种无线通信。术语“传输介质”应该被认为包括能够存储、编码、或者承载由机器600执行的指令的任何非有形介质，包括帮助这种软件的传送的数字或模拟通信信号或者其他非有形介质。
以上的详细描述包括对形成详细描述的一部分的附图的参考。附图通过图示示出了可以实施的具体实施例。这些实施例在这里也被称为“示例”。这些示例除了包括这些示出或描述的元件以外还包括其他元件。但是，还可以预见的是包括示出或描述的元件的示例。但是，还预见了使用示出或描述的这些元件的任意组合或置换的示例(或者其一个或多个方面)、或者针对特定示例(或者其一个或多个方面)、或者针对这里示出或描述的其他示例(或者其一个或多个方面)。
本文档中引用的公开文献、专利、以及专利文献通过引用被全部结合于此，如同通过引用被分别结合一样。在该文献与引用的其他文献之间存在不一致时，所结合的参考文献中的使用是对本文献的使用的补充；对不可调和的不一致，以本文献中的使用为准。
在本文献中，术语“一”或者“一个”被使用，如同在专利文献中通用的一样包括一个或者一个以上，并且独立于“至少一个”或者“一个或多个”的其它用例。在本文档中，术语“或者”被用来指代非排他性的或，从而使得在没有相反指示的情况下“A或B”包括“A而不是B”、“B而不是A”、以及“A和B”。在所附权利要求中，术语“包括”和“其中”被用作相应的术语“包含”和“其中”的普通的英文等同。另外，在下面的权利要求中，术语“包括”和“包含”是开放性的用语，即除了包括权利要求中在该术语后面所列的元件以外还包括其他元件的系统、设备、物件、或者处理仍然被认为落入该权利要求的范围内。另外，在下面的权利要求中，术语“第一”、“第二”、和“第三”等仅被用作标记，而不意图表示它们的对象的数字顺序。
以上的描述是说明性的而不是限制性的。例如，上述示例(或其一个或多个方面)可以与其他示例结合使用。本领域普通技术人员在阅读以上描述后可以使用其他实施例。摘要用于使读者迅速掌握本技术公开的本质(根据美国的37 C.F.R.§1.72(b))。应该理解，其将被用来解释或者限制权利要求的范围或者含义。另外，在上述详细描述中，各种特征可以被组合在一起，以精简本公开。但是，权利要求可以不阐述这里公开的特征，因为实施例可以包括这些特征的子集。另外，实施例可以包括比特定示例中公开的特征更少的特征。因此，下面的权利要求被结合到详细描述中，权利要求自己形成单独实施例。这里公开的实施例的范围被参考所附权利要求、以及这些权利要求的等同的完整范围来确定。

Claims (22)

1.一种提供针对长期演进(LTE)的虚拟载波检测的方法，包括：
在来自演进节点B(eNB)的第一下行链路传输中接收后续下行链路(DL)传输的通知，所述通知包括标识所述eNB计划在后续DL传输中使用的DL帧资源的信息；以及
在上行链路中发送对所接收的DL通知的确认，其中，所述确认包括标识所述eNB计划在所述后续DL传输中使用的DL帧资源的信息。
2.如权利要求1所述的方法，其中，接收包括标识所述eNB计划在所述后续DL传输中使用的DL帧资源的信息的所述通知包括：接收包括标识有多少子帧将被所述后续传输使用、以及与物理资源块(PRB)相关联的哪个频率将被使用的信息的所述通知。
3.如权利要求1所述的方法，其中，接收所述通知还包括：在下行链路控制信息(DCI)字段中接收所述通知。
4.如权利要求3所述的方法，其中，在所述下行链路控制信息(DCI)字段中接收所述通知包括：使用相同的时频资源接收所述通知。
5.如权利要求1所述的方法，其中，在所述上行链路中发送所述确认包括：在由至少第二eNB接收的上行链路中发送所述确认，以允许所述至少第二eNB使用与所述eNB的所述后续传输中使用的时频资源不同的时频资源来重新安排它的传输。
6.如权利要求1所述的方法，还包括：根据第三代合作伙伴计划(3GPP)LTE/LTE-A(长期演进/高级长期演进)进行操作。
7.一种提供针对长期演进(LTE)的虚拟载波检测的方法，包括：
监测用于来自用户设备(UE)的上行链路传输的上行链路；
在上行链路传输中接收DL通知的确认；以及
处理所述上行链路传输中的所述确认，以标识至少第二eNB计划在所述至少第二eNB的后续DL传输中使用的DL帧资源。
8.如权利要求7所述的方法，其中，接收所述确认还包括：响应于所述UE接收到通知而接收来自所述UE的确认，所述通知包括标识有多少子帧将被所述后续传输使用、以及与物理资源块(PRB)相关联的哪个频率将被使用的信息。
9.如权利要求7所述的方法，还包括：对所述确认进行解码，并且从经解码的确认提取与标识有多少子帧将被所述后续传输使用、以及与物理资源块(PRB)相关联的哪个频率将被使用的所述信息相关联的信息。
10.如权利要求9所述的方法，还包括：基于所提取的信息使用与所述至少第二eNB的所述后续传输中使用的时频资源不同的时频资源来重新安排传输。
11.如权利要求7所述的方法，还包括：将所述至少第二eNB计划在后续DL传输中使用的DL帧资源标记为忙，并且抑制使用经标记的DL帧资源。
12.一种演进节点B(eNB)，包括：
用于接收以及发送信号的收发器；以及
耦合到所述收发器的控制器，该控制器被布置为通过以下处理提供针对长期演进(LTE)的虚拟载波检测：
在来自演进节点B(eNB)的第一下行链路传输中接收后续下行链路(DL)传输的通知，所述通知包括标识所述eNB计划在后续DL传输中使用的DL帧资源的信息；以及
在上行链路中发送对所接收的DL通知的确认，其中，所述确认包括标识所述eNB计划在所述后续DL传输中使用的DL帧资源的信息。
13.如权利要求12所述的eNB，其中，所述控制器还接收包括标识有多少子帧将被所述后续传输使用、以及与物理资源块(PRB)相关联的哪个频率将被使用的信息的所述通知。
14.如权利要求12所述的eNB，其中，所述控制器还在下行链路控制信息(DCI)字段中接收所述通知。
15.如权利要求14所述的eNB，其中，所述控制器还使用相同的时频资源在所述下行链路控制信息(DCI)字段中接收所述通知。
16.如权利要求12所述的eNB，其中，所述控制器还在由至少第二eNB接收的上行链路中发送所述确认，以允许所述至少第二eNB使用与所述eNB的所述后续传输中使用的时频资源不同的时频资源来重新安排它的传输。
17.如权利要求12所述的eNB，其中，所述控制器还根据第三代合作伙伴计划(3GPP)LTE/LTE-A(长期演进/高级长期演进)进行操作。
18.一种提供针对长期演进(LTE)的虚拟载波检测的演进节点B(eNB)，包括：
用于接收以及发送信号的收发器；以及
耦合到所述收发器的控制器，该控制器被布置为通过以下处理提供针对长期演进(LTE)的虚拟载波检测：
监测用于来自用户设备(UE)的上行链路传输的上行链路；
在上行链路传输中接收DL通知的确认；以及
处理所述上行链路传输中的所述确认，以标识至少第二eNB计划在所述至少第二eNB的后续DL传输中使用的DL帧资源。
19.如权利要求18所述的eNB，其中，所述控制器还响应于所述UE接收到通知而接收来自所述UE的确认，所述通知包括标识有多少子帧将被所述后续传输使用、以及与物理资源块(PRB)相关联的哪个频率将被使用的信息。
20.如权利要求18所述的eNB，其中，所述控制器还对所述确认进行解码，并且从经解码的确认提取与标识有多少子帧将被所述后续传输使用、以及与物理资源块(PRB)相关联的哪个频率将被使用的所述信息相关联的信息。
21.如权利要求20所述的eNB，其中，所述控制器还基于所提取的信息使用与所述至少第二eNB的所述后续传输中使用的时频资源不同的时频资源来重新安排传输。
22.如权利要求18所述的eNB，其中，所述控制器将所述至少第二eNB计划在后续DL传输中使用的DL帧资源标记为忙，并且抑制使用经标记的DL帧资源。
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