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CN104205689A - 增强物理下行链路控制信道(ePDCCH)小区间干扰协调(ICIC) - Google Patents

增强物理下行链路控制信道(ePDCCH)小区间干扰协调(ICIC) Download PDF

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Publication number
CN104205689A
CN104205689A CN201380017826.2A CN201380017826A CN104205689A CN 104205689 A CN104205689 A CN 104205689A CN 201380017826 A CN201380017826 A CN 201380017826A CN 104205689 A CN104205689 A CN 104205689A
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China
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cce
epdcch
prb
cell
coordinating
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CN104205689B (zh
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朱源
陈晓刚
李庆华
K.伊特马德
S.韩
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Intel Corp
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Intel Corp
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Abstract

本文中公开了用于传递在物理资源块(PRB)中为多个小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的技术。一种方法能够包括节点映射在PRB中服务小区ePDCCH中的服务小区控制信道元素(CCE)和在PRB中协调小区ePDCCH中的协调小区CCE。节点能够将服务小区CCE和协调小区CCE的映射传送到无线装置。

Description

增强物理下行链路控制信道(ePDCCH)小区间干扰协调(ICIC)
背景技术
无线移动通信技术使用各种标准和协议在节点（例如，传送站）与无线装置（例如，移动装置）之间传送数据。一些无线装置在下行链路(DL)传送中使用正交频分多址(OFDMA)并且在上行链路(DL)传送中使用单载波频分多址(SC-FDMA)进行通信。为信号传送使用正交频分复用(OFDM)的标准和协议包括第三代合作伙伴项目(3GPP)长期演进(LTE)、行业团体通常称为WiMAX（微波接入全球互操作性）的电气和电子工程师协会(IEEE) 802.16标准（例如，802.16e、802.16m）及行业组通常称为WiFi的IEEE 802.11标准。
在3GPP无线电接入网络(RAN) LTE系统中，节点能够是演进通用地面无线电接入网络(E-UTRAN)节点B（通常也称为演进节点B、增强节点B、eNodeB或eNB）和与称为用户设备(UE)的无线移动装置进行通信的无线电网络控制器(RNC)的组合。下行链路(DL)传送能够是从节点（或eNodeB）到无线装置（或UE）的通信，并且上行链路(UL)传送能够是从无线装置到节点的通信。
在LTE中，数据能够经物理下行链路共享信道(PDSCH)从eNodeB传送到UE。物理下行链路控制信道(PDCCH)能够用于传送下行链路控制信息(DCI)，该信息通知UE与在PDSCH上的下行链路资源指派有关的资源分配或调度、上行链路资源授予和上行链路功率控制命令。PDCCH能够在从eNode B传送到UE的每个子帧中在PDSCH之前传送。
PDCCH信号能够设计成在UE基于小区特定参考信号(CRS)进行解调。然而，CRS的使用未将高级LTE系统的增大复杂性考虑在内。例如，在异类网络中，多个节点能够同时在单个小区内传送。小区特定参考信号的使用能够限制高级技术增大小区容量。
附图说明
结合通过示例一起示出本公开内容的特征的附图的以下详细描述，将明白本公开内容的特征和优点；以及其中：
图1根据示例示出无线电帧资源（例如，资源网格）的框图；
图2根据示例示出各种分量载波(CC)带宽的框图；
图3根据示例示出将与用于不同无线装置的下行链路控制信息(DCI)相关联的四个集中式聚合级别1控制信道元素(CCE)复用到一个物理资源块(PRB)对中的框图；
图4根据示例示出映射到使用集中式增强物理下行链路控制信道(ePDCCH)和分布式ePDCCH的子帧的控制信道元素(CCE)和资源元素群组(REG)的框图；
图5根据示例示出使用集中式增强物理下行链路控制信道(ePDCCH)和分布式ePDCCH映射到子帧的ePDCCH的框图；
图6根据示例以一个物理资源块(PRB)的粒度示出用于增强物理下行链路控制信道(ePDCCH)的频率域小区间干扰协调(ICIC)的框图；
图7根据示例示出将与用于不同小区的下行链路控制信息(DCI)相关联的增强物理下行链路控制信道(ePDCCH)中四个集中式聚合级别1控制信道元素(CCE)复用到一个物理资源块(PRB)对中的框图；
图8根据示例以一个集中式控制信道元素(CCE)的粒度示出用于增强物理下行链路控制信道(ePDCCH)的频率域小区间干扰协调(ICIC)的框图；
图9根据示例示出用于从节点传递在物理资源块(PRB)中为多个小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的方法的流程图；
图10根据示例示出用于在无线装置使用在物理资源块(PRB)中为多个协调小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的方法的流程图；
图11根据示例示出服务节点、协调节点和无线装置的框图；以及
图12根据示例示出无线装置的图。
现在将参照所示示范实施例，并且在本文中将使用特定语言描述示范实施例。然而，要理解的是，并不因此而要限制本发明的范围。
具体实施方式
在公开和描述本发明之前，要理解的是，本发明不限于本文中公开的特定结构、过程步骤或材料，而是可扩展到如相关领域技术人员将认识到的其等效物。也应理解的是，本文中采用的术语只用于描述特定示例的目的，并且无意于限制。不同图形中的相同标号表示相同元素。流程图和过程中提供的数字提供用于清晰说明步骤和操作，并且不一定指示特定顺序或序列。
示例实施例 
下面提供技术实施例的初始概述，并且随后在后面进一步详细描述特定技术实施例。此初始摘要旨在帮助读者更快地理解技术，并且无意于识别技术的关键特征或必要特征，也无意于限制所述主题的范围。
数据在PDSCH上的传递能够经称为物理下行链路控制信道(PDCCH)的控制信道进行控制。PDCCH能够用于下行链路(DL)和上行链路(UL)资源指派、传送功率命令和寻呼指示符。下行链路PDSCH调度授予能够指定到特定无线装置（例如，UE）以实现携带UE特定业务的专用PDSCH资源分配，或者它能够指定到小区中的所有无线装置以实现携带诸如系统信息或寻呼等广播控制信息的公用PDSCH资源分配。
在一个示例中，如图1所示，PDCCH和PDSCH能够表示在节点（例如，eNodeB）与无线装置（例如，UE）之间使用常规长期演进(LTE)帧结构在下行链路传送中的物理(PHY)层上传送的无线电帧结构的元素。
图1示出下行链路无线电帧结构类型2。在示例中，用于传送数据的信号的无线电帧100能够配置成具有10毫秒(ms)的持续时间T f 。每个无线电帧能够被分段或分割成10个子帧110i，每个子帧长1 ms。每个子帧还能够进一步细分成两个时隙120a和120b，每个时隙带有0.5 ms的持续时间T slot 。第一时隙(#0) 120a能够包括遗留物理下行链路控制信道(PDCCH) 160和/或物理下行链路共享信道(PDSCH) 166，并且第二时隙(#1) 120b能够包括使用PDSCH传送的数据。
基于CC频率带宽，用于由节点和无线装置使用的分量载波(CC)的每个时隙可包括多个资源块(RB) 130a、130b、130i、130m和130n。CC能够具有载频，载频具有带宽和中心频率。CC的每个子帧能够包括在遗留PDCCH中存在的下行链路控制信息(DCI)。在使用遗留PDCCH时，控制区域中的遗留PDCCH能够包括在每个子帧或RB中第一OFDM符号的一到三列。子帧中的剩余11到13个OFDM符号（或未使用遗留PDCCH时的14个OFDM符号）可分配到用于数据的PDSCH（用于短或普通循环前缀）。
每个RB（物理RB或PRB）130i能够包括12-15kHz副载波136（在频率轴上）和每时隙6或7个正交频分复用(OFDM)符号132（在时间轴上）。如果采用短或普通循环前缀，则RB可使用七个OFDM符号。如果使用扩展循环前缀，则RB能够使用六个OFDM符号。资源块能够使用短或普通循环前缀映射到84个资源元素(RE) 140i，或者资源块能够使用扩展循环前缀映射到72个RE（未示出）。RE能够是一个OFDM符号142乘以一个副载波（即，15kHz）146的单位。
在正交相移键控(QPSK)调制的情况下，每个RE能够传送两比特150a和150b的信息。可使用诸如16正交调幅(QAM)或64 QAM等其它类型的调制在每个RE中传送更大数量的比特，或者使用双相移键控(BPSK)调制在每个RE中传送更少数量的比特（单比特）。RB能够配置用于从eNodeB到UE的下行链路传送，或者RB能够配置用于从UE到eNodeB的上行链路传送。
如图2所示，每个无线装置可使用至少一个信号带宽、载波带宽或分量载波(CC)。例如，LTE CC带宽能够包括：1.4 MHz 310、3 MHz 312、5 MHz 314、10 MHz 316、15 MHz 318及20 MHz 320。1.4 MHz CC能够包括有72个副载波的6个RB。3 MHz CC能够包括有180个副载波的15个RB。5 MHz CC能够包括有300个副载波的25个RB。10 MHz CC能够包括有600个副载波的50个RB。15 MHz CC能够包括有900个副载波的75个RB。20 MHz CC能够包括有1200个副载波的100个RB。
在PDCCH上携带的数据能够称为下行链路控制信息(DCI)。在无线电帧的一个子帧中能够调度多个无线装置。因此，多个DCI消息能够使用多个PDCCH发送。PDCCH中的DCI信息能够使用一个或更多个控制信道元素(CCE)传送。CCE能够包括一组资源元素群组(REG)。遗留CCE能够包括最多九个REG。每个REG能够包括四个资源元素(RE)。在使用正交调制时，每个资源元素能够包括两比特的信息。因此，遗留CCE能够包括最多72比特的信息。在需要不止72比特的信息来输送DCI消息时，能够采用多个CCE。多个CCE的使用能够称为聚合级别。在一个示例中，聚合级别能够定义为分配到一个PDCCH的1、2、4或8个连续CCE。
遗留PDCCH能够形成在无线通信的其它领域中取得的进展的限制。例如，在OFDM符号中CCE到子帧的映射一般情况下在控制区域内扩展以提供空间分集。然而，使用当前映射过程时，波束形成分集不可能实现。另外，由于无法在相邻小区之间保证正交性，因此，与相邻小区的干扰协调不可能实现，由此导致潜在的副载波冲突发生。
另外，遗留PDCCH的容量可能不足以用于高级控制信令。例如，网络可配置为能够在单个宏小区服务区域中包括多个不同种类的节点的异类网络(HetNet)。HetNet中的宏小区和微微小区能够同时服务于更多个无线装置。PDCCH能够设计成基于小区特定参考信号(CRS)进行解调，这能够使完全利用小区分割增益变得困难。遗留PDCCH可能不适合输送允许无线装置利用HetNet中的多个传送节点以在无线装置增大带宽和降低电池使用所需的信息。
另外，多用户多输入多输出(MU-MIMO)、机器到机器通信(M2M)、多播/广播单频网络中PDSCH传送及载波聚合中跨载波调度的使用能够要求增大用于PDCCH的容量。在无线装置的PDCCH解调中UE特定参考信号(UERS)的使用能够允许在HetNet中使用多个节点。每个参考符号可以是UE特定型（例如，UERS），而不是依赖用于整个小区的单个公用参考符号（例如，CRS）。
为克服遗留PDCCH的限制，增强PDCCH (ePDCCH)能够使用在整个PRB或PRB对中的RE（其中，PRB对是使用相同副载波的子帧的两个连续PRB），而不是如遗留PDCCH中一样只使用子帧中第一时隙PRB中OFDM符号的前面一到三列。相应地，能够为ePDCCH配置增大的容量，以允许蜂窝网络的设计中的进展和最小化当前已知挑战。
ePDCCH能够用于支持频率域小区间干扰协调(ICIC)。在示例中，通过将频率域中随后能够接近于节点收到的子信道的部分的功率降低，ICIC能够用于降低在相邻小区或节点（例如，协调节点或协作节点）之间的干扰。子信道不干扰在相邻小区中使用的相同子信道，且因此，数据能够在接近小区的子信道上以更少干扰发送到移动装置。
另一ICIC技术是在时间域中用于异类网络(HetNet)的增强ICIC (eICIC)，其中，高功率宏小区能够通过诸如微小区（在购物中心或机场的热点）或毫微微小区（诸如住宅或商业区等小区域中的热点）等低功率节点而得到补充。低功率节点能够存在于宏小区覆盖区域内。宏小区能够传送远距离高功率信号，并且低功率节点能够在短距离内传送低功率信号。在减轻在宏小区与位于宏小区覆盖区域内的几个低功率节点之间干扰的示例中，eICIC能够协调宏小区中时间域中子帧的留空。在本文中使用时，小区能够指配置成与在称为小区覆盖区域的地理区域内的无线装置进行通信的节点（例如，eNB）。
不同于遗留PDCCH，ePDCCH能够与PDSCH映射到PRB中的相同RE或区域，但处在不同PRB中。在示例中，PDSCH和ePDCCH可不在相同PRB（或相同PRB对）内复用。因此，如果一个PRB（或一个PRB对）包含ePDCCH，则PRB（或PRB对）中未使用的RE可被留空，这是因为这些RE可能未用于PDSCH。
图3示出在PRB对128中ePDCCH的4个DCI 182、184、186和188。ePDCCH的每个DCI能够由至少一个CCE传送，并且每个CCE能够包括多个REG，并且每个REG能够包括多个RE。图3示出在一个PRB对中复用多个聚合级别1 (AGL1)集中式CCE时ePDCCH的复用模式。一个聚合级别1 CCE（例如，单个CCE）能够包括一个DCI，因此，四个CCE能够包括四个单独的DCI。在另一示例（未示出）中，聚合级别2 CCE（例如，两个CCE）能够包括一个DCI。PRB对也能够包括遗留控制162（例如，遗留PDCCH）和诸如小区特定参考信号(CRS) 170、UE特定参考信号(UERS) 172和174等用于解调和信道估计的参考信号。在示例中，DCI 1和DCI 2能够使用UERS 172，UERS 172能够与由DCI 3和DCI 4使用的UERS 174不同。
PRB或PRB对能够用于支持集中式ePDCCH和分布式ePDCCH传送。图4和5示出在时隙或子帧中的集中式ePDCCH和分布式ePDCCH。在集中式ePDCCH 332a-b中，如图4所示，整个CCE 310a-h可在子带338a和338c内的PRB 330a和330c（或PRB对）内。在示例中，集中式CCE的REG（或RE）能够是相互连续的，其后面可以是后一CCE。在分布式ePDCCH 324a-b中，CCE 312a-b的REG 340a-b、342a-b、344a-b、346a-b、348a-b、350a-b、352a-b及354a-b能够分布在多个PRB 330b和330d（或PRB对）上。在一个PRB 330中的REG 340a和在另一PRB 330d中的REG 340b能够形成用于DCI或分布式ePDCCH的CCE 312a。在分布式ePDCCH中，用于CCE的REG能够分布在两个或更多个PRB（或两个或更多个PRB对）上。在示例中，在分布式ePDCCH中使用的CCE的REG能够分布在不同子带338b和338d上。
图5提供映射到子帧内CCE、REG和RE的集中式ePDCCH和分布式ePDCCH的另一示例。在图5的示例中，如图1所示，每个资源块对能够包括两个资源块（RB或PRB），每个资源块具有位于无线电帧的子帧中第一和第二时隙中的相同副载波。每个RB能够包括至少一个CCE。CCE可在RB内的定义的位置中。然而，CCE可包括位于遍及整个资源块的REG。每个REG可包括四个RE。然而，基于系统要求，REG可包括更多或更少个RE。在示例中，位于REG中的RE能够在频率和时间至少之一方面是连续的。在另一示例中，位于REG中的RE可在时间和/或频率方面是分开的。CCE中REG的数量可以是固定数量，如9。备选，基于DCI数据负载要求（即，DCI数据量）或RB中的其它竞争要求，如物理控制格式指示符信道(PCFICH)要求、物理混合ARQ指示符信道(PHICH)要求、用于每个资源块内分配的数据的资源符号要求，可改变REG的数量。CCE可跨物理资源块对中的时隙边界映射。
如图5所示，具有聚合级别(AGL)一的集中式ePDCCH 402能够映射到单个CCE，而该CCE能够映射到单个RB。类似地，带有聚合级别2的集中式ePDCCH 404可映射到RB中的两个连续CCE。对于分布式ePDCCH 406和408，CCE（例如，CCE 1和CCE N）能够映射到不同频率载波和副载波中不同RB中的多个REG。例如，用于CCE N的REG能够在频率方面是分布式。REG的频率分隔能够提供频率分集增益。在示例中，CCE中的每个REG可映射到单独的RB，但不止一个REG可映射到与另一REG相同的RB。通过广泛分布的REG，能够产生更大的频率分集增益。CCE 1和CCE N中的REG可在子帧中的RB之间具有相同分布（已示出）或不同分布（未示出）。虽然分布式ePDCCH 406和408中示出的REG每个示为在RB内的相同时间位置中，但对于每个相应CCE，不要求用于分布式ePDCCH的RB内的相同时间位置。CCE 1和CCE N中的分布式REG可在资源块内的不同时间位置中。子帧中的每个CCE可具有相同数量的REG或不同数量的REG。分布式ePDCCH能够具有聚合级别1。聚合级别1暗示DCI信息能够映射到单个CCE。
CCE中REG在频率上到子帧中不同资源块的分布能够提供增大的频率分集增益。为实现良好的频率分集，能够使用3或4的频率分集阶数。图5示出分布式ePDCCH 406和408传送高频率分集阶数和低聚合级别。
通过使用宽带信道状态信息(CSI)反馈，应用宽带调度，能够实现用于小区的频率分集。例如，ePDCCH配置能够配置有每个小区中的四个PRB对以实现使用分布式ePDCCH传送的频率分集阶数4。
由于遗留频率域ICIC方案只可支持PRB对级别ICIC，因此，如果使用用于ePDCCH ICIC的频率域ICIC方案，则可为PDSCH传送在相邻小区（例如，协调小区）中将更多PRB对静音。图6提供带有三个小区（例如，小区A、B和C）的ePDCCH配置的示例，其中，每个小区配置有用于ePDCCH的四个PRB。为在频率域ICIC中实现频率分集阶数4和频率再使用因子3，每个小区分配有总共12个PRB，这些PRB专门用于ePDCCH和小区的ICIC。图6示出用于10 MHz的系统带宽的PRB捆绑或资源块编组（例如，50个PRB 232a-b；参见图2的316），有12个PRB（或4个资源块群组(RBG) 224d、g、j和m）分配用于ePDCCH和小区的ICIC，并且剩余38个PRB（或13个RBG 224a-c、e-f、h-i、k-l及n-q）分配到PDSCH。每个RBG能够分配到子集0、1或2 (226a-c)。在示例中，每个子集能够表示一个小区（例如，小区A、B或C）。
在图6中，50个PRB能够由PRB 0-23 232a （用于从PRB 0 230a到PRB 23 230b的PRB）和PRB 24-49 232b（用于从PRB 24 230c到PRB 49 230d的PRB）表示。由于ePDCCH能够在PRB基础（或PRB对基础）上进行分配，因此，每个小区能够包括专用ePDCCH 222a-c和用于频率分集阶数4的四个专用ePDCCH。用于协调小区ePDCCH（用于小区A传送的小区B和C ePDCCH）的未使用PRB能够被留空，这可能不是资源的有效使用。在频率域ICIC中频率分集阶数为4和频率再使用因子为3的示例中，用于10 MHz系统带宽的50个PRB的8个PRB可被留空，它们不能用于PDSCH传送。
为同时实现用于频率域ICIC的高频率分集阶数和有意义的频率再使用因子，带有比一个PRB（或一个PRB对）更精细粒度的ePDCCH能够用于更大的资源利用，这能够用于频率域ICIC。例如，用于ePDCCH ICIC的频率域粒度能够如一个集中式CCE一样精细。
图7示出配置有相同四个PRB对以传送用于频率分集阶数4的ePDCCH的四个小区的示例。每个CCE能够是集中式CCE，其中，REG在PRB（或PRB对）内在时间和/或频率方面是连续的。在示例中，每个CCE（与DCI相关联）能够具有聚合级别1，并且能够配置用于单独小区的单独ePDCCH 192、194、196和198。
图8示出用于为分集增益阶数4传送ePDCCH的四个PRB对230e-h。由于一个PRB对能够包含四个集中式CCE，因此，每个小区能够在用于频率分集阶数4的四个PRB对中的一个集中式CCE中传送分布式ePDCCH 220。因此，带有集中式CCE的四个PRB对能够用于实现频率再使用因子4和频率分集阶数4的分布式传送，这能够以一个PRB（或一个PRB对）的粒度消除用于ePDCCH的12个留空PRB，非留空PRB能够用于PDSCH传送。
为允许实现用于ePDCCH的PRB内（或PRB对内）ICIC，集中式CCE到RE映射模式可以是小区公用的。因此，无小区特定随机映射可定义用于集中式CCE。用于ePDCCH的PRB内（或PRB对内）ICIC能够指在用于不同小区的一个PRB（或PRB对）中的多个集中式CCE。
分布式CCE（未示出）也能够使用，其中，CCE的REG（或RE）分布在多个PRB（或PRB对）上。将一个分布式CCE映射到来自多个PRB（或PRB对）的RE时，属于相同集中式CCE的RE能够映射到每个PRB（或PRB对）。例如，在图7和8中，每个PRB对包含四个集中式CCE 192、194、196和198（图7），并且每个小区配置有用于ePDCCH的四个PRB对230e-h（图8）。将分布式CCE映射到每个PRB对（在四个PRB对中）中的相同集中式CCE允许分布式CCE实现与集中式CCE相同的CCE粒度ICIC增益。
为支持带有比一个PRB对更精细粒度的频率域ICIC，能够扩展X2应用协议中的相对窄带传送器(Tx)功率(RNTP)报告。例如，ePDCCH信息元素(IE)中每增强CCE (E-CCE)的相对窄带传送器功率(RNTP)能够添加到RNTP报告以支持用于ePDCCH的CCE粒度ICIC。E-CCE能够包括用于ePDCCH的集中式CCE。ePDCCH IE中每E-CCE的RNTP能够包括IE/群组名称（ePDCCH中每E-CCE的RNTP）、存在、范围、IE类型和参数、语义描述、关键性及指派的关键性。用于ePDCCH IE中每E-CCE的RNTP 的存在能够包括强制(M)存在。ePDCCH IE中每E-CCE的RNTP 能够包括比特字符串(1..4, ...) IE类型，其中，（语义描述）位图中的每个位置表示E-CCE索引                                               值，用于其的比特值表示RNTP  ()，其中，索引与从0到编号的E-CCE集相关联，是用于子帧k的E-CCE的总数，并且RNTP ()是E-CCE索引的函数。值0能够指示“Tx未超过RNTP阈值”(Tx not exceeding RNTP threshold)，并且值1能够指示“未提供有关Tx功率的承诺”(no promise on the Tx power is given)。
在示例中，如果ePDCCH IE中每E-CCE的RNTP只包含4比特，则eNB能够为用于PRB对中所有ePDCCH的相同E-CCE应用相同功率策略。如果ePDCCH IE中每E-CCE的RNTP包含不止4比特，则能够允许更大灵活性。例如，如果允许eNB为每个PRB对中每个单独E-CCE应用不同功率控制策略，则可使用总共4*N_ePDCCH_PRB比特，其中，N_ePDCCH_PRB表示用于ePDCCH的PRB（或PRB对）的总数。
在一个示例实施例中，节点（例如，eNB)能够接收定义如下的相对窄带传送器功率(RNTP)指示：
其中，是在考虑的将来时间间隔中在天线端口p上子PRB中不包含参考信号(RS)的正交频分复用(OFDM)符号中，每用户设备特定（UE特定）物理下行链路共享信道(PDSCH)资源元素(RE)的资源元素(EPRE)的最大预期能量，是子物理资源块号，采用以下值之一，以分贝[dB]为单位，并且，其中，是节点最大输出功率（例如，基站最大输出功率），以及是副载波间隔，是以的倍数表示的下行链路带宽配置，是以副载波的数量表示的频率域中资源块大小，以及是所述PRB中的子物理资源块(SRB)，其中，。RNTP指示能够用于为用于PRB（或PRB对）中ePDCCH的E-CCE应用功率策略。
E-CCE RNTP（例如，ePDCCH IE中每E-CCE的RNTP）和/或ePDCCH PRB分配和配置能够包括在X2信令中。ePDCCH配置信息的示例能够包括ePDCCH PRB对分配IE、一个PRB对中E-CCE的数量(#) IE和E-CCE类型IE。ePDCCH PRB对分配IE、一个PRB对中E-CCE的#IE和E-CCE类型IE能够包括IE/群组名称、范围、IE类型和参考、语义描述、关键性及指派的关键性。用于ePDCCH PRB对分配IE、一个PRB对中E-CCE的#IE和E-CCE类型IE的存在能够包括强制(M)存在。
在一个实施例中，ePDCCH PRB对分配IE能够包括比特字符串(1.., ...) IE类型，其中，在语义描述中，位图中的每个位置表示一个PRB对是否分配为ePDCCH，并且表示在系统带宽中下行链路PRB的数量。一个PRB对中E-CCE的# IE能够包括枚举(3, 4) IE类型，其中，在语义描述中，枚举类型表示在一个PRB对中集中式E-CCE的数量。E-CCE类型IE能够包括比特字符串(1 .. *4, ...) IE类型，其中，在语义描述中，位图中的每个位置表示E-CCE是集中式还是非集中式，并且表示在系统带宽中下行链路PRB的数量。
ePDCCH IE中每E-CCE的RNTP、ePDCCH PRB对分配IE、一个PRB对中E-CCE的#IE及E-CCE类型IE能够包括在用于确定PDCCH指派的UE过程中。只要功能性类似，对于带有在ePDCCH中分配的集中式CCE的粒度的E-CCE功能性和CCE的功能性，所述IE的名称、标签和描述便可不同。所述IE能够在协调节点（例如，服务节点与其它协调节点）之间传送。通过使用无线电资源控制(RRC)信令，能够将来自所述IE的信息从服务节点（例如，eNB）传送或转发到由服务节点服务的服务无线装置（例如，UE）。
无线装置（例如，UE）能够在高级接收器中使用ePDCCH PRB分配和ePDCCH配置信息。高级接收器能够包括带有干扰抑制合并的最小均方误差(MMSE-IRC)接收器以测量在UERS上的干扰，并且为每个单独数据RE使用干扰的平均值。例如，通常在一个小区中传送ePDCCH时，相邻小区（例如，协调小区）能够在相同PRB对中传送PDSCH。在为PDSCH进行干扰平均时，无线装置可不使用UERS RE的干扰平均值，这是因为在每个UERS RE中观察到的干扰协方差矩阵可与不同E-CCE重叠。
如果无线装置接收诸如用于ICIC的ePDCCH中CCE的映射等ePDCCH配置信息，即相邻小区在一个PRB对中传送ePDCCH并且知道用于相邻小区的ePDCCH配置，则无线装置能够在高级接收器中逐E-CCE（即，每E-CCE）平均干扰。
一个集中式CCE分配有一个ePDCCH的粒度能够在一些应用（如频率域ICIC）中比用于ePDCCH的PRB（或PRB对）提供更大的资源利用。另外，一个集中式CCE分配有一个ePDCCH的粒度也能够为ICIC提供更佳干扰平均。
另一示例提供用于从节点传递在物理资源块(PRB)中为多个小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的方法500，如图9中流程图所示。方法可作为机器上的指令执行，其中，指令包括在至少一个计算机可读介质上。方法包括映射在PRB中服务小区ePDCCH中的服务小区控制信道元素(CCE)和在PRB中协调小区ePDCCH中的协调小区CCE的操作，如在框510中一样。随后是将服务小区CCE和协调小区CCE的映射传送到无线装置的操作，如在框520中一样。服务小区CCE和协调小区CCE的映射能够用于通过无线装置的干扰察觉接收器促进ICIC。
方法能够还包括节点（例如，服务节点或服务小区）将PRB中服务小区CCE或协调小区CCE的映射传送到协调节点（例如，协调小区）。服务小区CCE（或协调小区CCE）能够是使用集中式CCE到资源元素(RE)公用小区映射模式的集中式CCE。将PRB中服务小区CCE或协调小区CCE的映射传送到协调节点的操作能够使用X2应用协议(X2AP)。服务小区ePDCCH能够是集中式ePDCCH或分布式ePDCCH。将PRB中服务小区CCE和协调小区CCE的映射传送到无线装置的操作能够使用无线电资源控制(RRC)信令。
将PRB中服务小区CCE或协调小区CCE的映射传送到协调节点的操作能够包括在带有位图的ePDCCH信息元素(IE)中每增强CCE (E-CCE)的相对窄带传送器功率(RNTP)。位图中的每个位置能够表示E-CCE索引值，用于其的比特值表示RNTP ()，其中，索引与从0到编号的E-CCE集相关联，是用于子帧k的E-CCE的总数，并且RNTP ()是E-CCE索引的函数。在另一示例中，将PRB中服务小区CCE或协调小区CCE的映射传送到协调节点的操作能够包括带有位图的增强CCE (E-CCE)类型信息元素(IE)。位图中的每个位置能够表示E-CCE是集中式还是非集中式。
在另一示例中，服务小区CCE和协调小区CCE能够映射在PRB对中。PRB对能够在相同子帧内，并且能够配置成携带多个ePDCCH。将PRB中服务小区CCE或协调小区CCE的映射传送到协调节点的操作能够包括带有位图的ePDCCH PRB对分配信息元素(IE)。位图中的每个位置能够表示一个PRB对是否分配为ePDCCH。在另一示例中，将PRB中服务小区CCE或协调小区CCE的映射传送到协调节点的操作能够包括在带有枚举类型的一个PRB对信息元素(IE)中增强CCE (E-CCE)的数量。枚举类型能够表示在一个PRB对中集中式E-CCE的数量。
方法能够还包括节点在下行链路中将服务小区ePDCCH传送到无线装置，并且与协调小区ePDCCH相关联的资源元素(RE)能够被留空。
另一示例提供用于在无线装置使用在物理资源块(PRB)中为多个协调小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的方法600，如图10中流程图所示。方法可作为机器上的指令执行，其中，指令包括在至少一个计算机可读介质上。方法包括在无线装置从节点接收在PRB中的ePDCCH中用于小区的控制信道元素(CCE)的操作，其中，PRB配置成携带多个ePDCCH，并且每个ePDCCH对应于用于多个协调小区中单独小区的至少一个CCE，如在框610中一样。随后是从来自PRB的ePDCCH配置信息生成干扰协方差矩阵的操作，其中，干扰协方差矩阵包括协调小区干扰，如在框620中一样。
与用于协调小区的ePDCCH相关联的资源元素(RE)能够被留空。CCE能够是集中式CCE，并且ePDCCH能够是集中式ePDCCH或分布式ePDCCH。用于ePDCCH中小区的CCE能够映射在PRB对中。PRB对能够在相同子帧内，并且能够配置成携带多个ePDCCH。
图11示出示例节点（例如，服务节点710和协作节点730）和示例无线装置720。节点能够包括节点装置712和732。节点装置或节点能够配置成与无线装置进行通信。节点装置能够配置成传递在物理资源块(PRB)中为多个小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)。节点装置或节点能够配置成经诸如X2应用协议(X2AP)等回程链路740（光或有线链路）与其它节点进行通信。节点装置能够包括处理模块714与734和收发器模块716与736。收发器模块能够配置成与无线装置进行通信，并且发送与在PRB中服务小区ePDCCH相关联的服务小区控制信道元素(CCE)和在PRB中协调小区ePDCCH中的协调小区CCE的映射。收发器模块能够还配置成与协调节点进行通信，并且传送或接收服务小区CCE或协调小区CCE的映射。
收发器模块716和736能够还配置成接收定义如下的相对窄带传送器功率(RNTP)指示：
其中，是在考虑的将来时间间隔中在天线端口p上子PRB中不包含参考信号(RS)的正交频分复用(OFDM)符号中，每用户设备特定（UE特定）物理下行链路共享信道(PDSCH)资源元素(RE)的资源元素(EPRE)的最大预期能量，是子物理资源块号，采用以下值之一，以分贝[dB]为单位，并且，其中，是节点最大输出功率，以及是副载波间隔，是以的倍数表示的下行链路带宽配置，是以副载波的数量表示的频率域中资源块大小，以及是PRB中的子物理资源块(SRB)，其中，。
收发器模块716和736能够还配置成经X2应用协议(X2AP)与协调节点进行通信。收发器模块还配置成经RRC信令与无线装置进行通信。CCE能够包括集中式CCE，并且ePDCCH能够包括集中式ePDCCH或分布式ePDCCH。收发器模块还能够配置成在下行链路中将服务小区ePDCCH传送到无线装置。与协调小区ePDCCH相关联的资源元素(RE)能够被留空。
PRB中服务小区CCE或协调小区CCE的映射能够包括在带有位图的ePDCCH信息元素(IE)中每增强CCE (E-CCE)的相对窄带传送器功率(RNTP)。位图中的每个位置表示E-CCE索引值，用于其的比特值表示RNTP ()，其中，索引与从0到编号的E-CCE集相关联，是用于子帧k的E-CCE的总数，并且RNTP ()是E-CCE索引的函数。在另一示例中，PRB中服务小区CCE或协调小区CCE的映射能够包括带有位图的增强CCE (E-CCE)类型信息元素(IE)。位图中的每个位置表示E-CCE是集中式还是非集中式。
服务小区CCE和协调小区CCE能够映射在PRB对中。PRB对能够在相同子帧内，并且能够配置成携带多个ePDCCH。PRB对中服务小区CCE或协调小区CCE的映射能够包括带有位图的ePDCCH PRB对分配信息元素(IE)。位图中的每个位置表示一个PRB对是否分配为ePDCCH。PRB对中服务小区CCE或协调小区CCE的映射能够包括带有枚举类型的一个PRB对信息元素(IE)中的增强CCE (E-CCE)的数量。枚举类型能够表示在一个PRB对中集中式E-CCE的数量。
处理模块714和734能够配置成映射PRB中服务小区CCE和协调小区CCE。节点（例如，服务节点710和协作节点730）能够包括基站(BS)、节点B (NB)、演进节点B (eNB)、基带单元(BBU)、远程无线电头端(RRH)、远程无线电设备(RRE)或远程无线电单元(RRU)。
无线装置720能够包括收发器模块724和带有干扰抑制合并的最小均方误差(MMSE-IRC)接收器722。无线装置能够配置成接收在物理资源块(PRB)中为多个协调小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)。收发器模块能够配置成接收在PRB中的ePDCCH中用于小区的控制信道元素(CCE)。PRB能够配置成携带多个ePDCCH，并且每个ePDCCH能够与用于多个协调小区中单独小区的至少一个CCE相关联。在示例中，收发器模块能够配置成经RRC信令接收PRB中用于ePDCCH中小区的CCE。
与用于协调小区的ePDCCH相关联的资源元素(RE)能够被留空。用于ePDCCH中小区的CCE能够映射在PRB对中。PRB对能够在相同子帧内，并且能够配置成携带多个ePDCCH。
MMSE-IRC接收器722能够配置成从来自PRB（或PRB对）的ePDCCH配置信息生成干扰协方差矩阵。干扰协方差矩阵能够包括协调小区干扰。
图12提供无线装置的示例图示，如用户设备(UE)、移动台(MS)、移动无线装置、移动通信装置、平板、手持机或其它类型的无线装置。无线装置能够包括配置成与节点、宏节点、低功率节点(LPN)或诸如基站(BS)、演进节点B (eNB)等传送站、基带单元(BBU)、远程无线电头端(RRH)、远程无线电设备(RRE)、中继站(RS)、无线电设备(RE)或其它类型的无线宽域网(WWAN)接入点进行通信的一个或多个天线。无线装置能够配置成使用至少一个无线通信标准进行通信，包括3GPP LTE、WiMAX、高速分组接入(HSPA)、蓝牙和WiFi。无线装置能够为每个无线通信标准使用单独天线或者为多个无线通信标准使用共享天线进行通信。无线装置能够在无线局域网(WLAN)、无线个人区域网(WPAN)和/或WWAN中进行通信。
图12也提供能够用于来自无线装置的音频输入和输出的麦克风和一个或多个扬声器的图示。显示屏幕可以液晶显示器(LCD)屏幕或其它类型的显示屏幕，如有机发光二极管(OLED)显示器。显示屏幕能够配置为触摸屏。触摸屏可使用电容性、电阻性或另一类型的触摸屏技术。应用处理器和图形处理器能够耦合到内部存储器以提供处理和显示能力。非易失性存储器端口也能够用于为用户提供数据输入/输出选择。非易失性存储器端口也可用于扩展无线装置的存储器能力。键盘可与无线装置集成，或以无线方式连接到无线装置以提供另外的用户输入。也可使用触摸屏提供虚拟键盘。
各种技术或其某些方面或部分可采用在诸如软盘、CD-ROM、硬盘、非短暂性计算机可读存储介质或任何其它机器可读存储介质等有形介质中实施的程序代码（即，指令）的形式，其中，在程序代码载入诸如计算机等机器中并由其执行时，机器变成用于实践各种技术的设备。就在可编程计算机上的程序代码执行而言，计算装置可包括处理器、处理器可读的存储介质（包括易失性和/或非易失性存储器和/或存储元件）、至少一个输入装置和至少一个输出装置。易失性和非易失性存储器和/或存储元素可以是RAM、EPROM、闪存驱动器、光盘驱动器、磁性硬盘驱动器或用于存储电子数据的其它介质。节点和无线装置也可包括收发器模块、计数器模块、处理模块和/或时钟模块或计时器模块。可实现或利用本文中所述各种技术的一个或多个程序可使用应用编程接口(API)、可再用控制及诸如此类。此类程序可以面向过程或对象的高级编程语言实现以便与计算机系统进行通信。然而，程序在需要时可以汇编或机器语言实现。任何情况下，语言可以是汇编或解释语言，并且与硬件实现组合。
应理解的是，在此规范中描述的许多功能单元已标示为模块以便更明确强调其实现独立性。例如，模块可实现为包括自定义VLSI电路或门阵列的硬件电路、诸如逻辑芯片、晶体管等现成的半导体或其它离散组件。模块也可在可编程硬件装置中实现，如现场可编程门阵列、可编程阵列逻辑、可编程逻辑装置或诸如此类。
模块也可在软件中实现以便由各种类型的处理器执行。可执行代码的识别的模块例如可包括计算机指令的一个或多个物理或逻辑块，这些块例如可组织为对象、过程或功能。不过，识别的模块的可执行文件无需物理上定位在一起，而是可包括在不同位置存储的全异指令，这些指令在以逻辑方式结合在一起时，包括模块并且实现用于模块的所述目的。
实际上，可执行代码的模块可以是单个指令或多个指令，并且甚至可在几个不同的代码段上，在不同的程序之间和跨几个存储器装置分布。类似地，操作数据可在本文中在模块内识别和示出，并且可以任何适合形式实施以及在任何适合类型的数据结构内组织。操作数据可收集为单个数据集，或者可在不同位置内分布，包括在不同存储装置上分布，并且可至少部分只作为在系统或网络上的电子信号存在。模块可以是无源或有源，包括用于执行所需功能的代理。
此说明书通篇对“示例”的引用指结合该示例描述的特定特征、结构或特性包括在本发明的至少一个实施例中。因此，在此说明书通篇各个位置出现的“在示例中”短语不一定全部指同一实施例。
在本文中使用时，为方便起见，多个项目、结构元素、组成元素和/或材料可在共同列表中示出。然而，应将这些列表视为好象列表的每个成员被单独识别为单独和唯一的成员。因此，不应只基于在共同群组中的其表示而无反面的指示，将此类列表的单独成员视为相同列表的任何其它成员的事实等效物。另外，本发明的各种实施例和示例可在本文中与用于其各种组件的备选一起引用。要理解的是，此类实施例、示例和备选不得视为彼此的事实等效物，而是要视为本发明的单独和自主表示。
此外，描述的特性、结构或特征可在一个或多个实施例中以任何适合的方式组合。在下面的描述中，提供了诸如布局、距离、网络示例的示例等许多特定的细节以提供本发明的实施例的详尽理解。然而，相关领域的技术人员将认识到，本发明可在不存在一个或多个特定细节的情况下实践，或者通过其它方法、组件、布局等实践。在其它实例中，熟知的结构、材料或操作未详细示出或描述，以免混淆本发明的方面。虽然上述示例说明了在一个或多个特定应用中本发明的原理，但本领域技术人员将明白的是，在未行使发明能力的情况下以及在不脱离本发明的原理和概念的情况下，能够在实现的形式、使用和细节上进行各种修改。相应地，除非受所附权利要求书所限制，否则，无意限制本发明。

Claims (20)

1. 一种用于从节点传递在物理资源块(PRB)中为多个小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的方法，包括：
映射在PRB中服务小区ePDCCH中的服务小区控制信道元素(CCE)和在所述PRB中协调小区ePDCCH中的协调小区CCE；以及
将所述服务小区CCE和所述协调小区CCE的所述映射传送到无线装置。
2. 如权利要求1所述的方法，还包括：
将所述PRB中所述服务小区CCE或所述协调小区CCE的所述映射传送到协调节点，其中所述服务小区CCE是使用集中式CCE到资源元素(RE)公用小区映射模式的集中式CCE，其中将所述PRB中所述服务小区CCE或协调小区CCE的所述映射传送到所述协调节点使用X2应用协议(X2AP)，并且所述服务小区ePDCCH是集中式ePDCCH或分布式ePDCCH。
3. 如权利要求2所述的方法，其中将所述PRB中所述服务小区CCE或所述协调小区CCE的所述映射传送到所述协调节点包括带有位图的ePDCCH信息元素(IE)中每增强CCE (E-CCE)的相对窄带传送器功率(RNTP)，其中所述位图中的每个位置表示E-CCE索引                                               值，用于其的比特值表示RNTP ()，其中索引与从0到编号的E-CCE集相关联，其中，是用于子帧k的E-CCE的总数，并且RNTP ()是E-CCE索引的函数。
4. 如权利要求2所述的方法，其中在RPB对中映射所述服务小区CCE和所述协调小区CCE，其中相同子帧内的所述PRB对配置成携带多个ePDCCH。
5. 如权利要求4所述的方法，其中将所述PRB对中所述服务小区CCE或所述协调小区CCE的所述映射传送到所述协调节点包括带有位图的ePDCCH PRB对分配信息元素(IE)，其中所述位图中的每个位置表示一个PRB对是否分配为ePDCCH。
6. 如权利要求4所述的方法，其中将所述PRB对中所述服务小区CCE或所述协调小区CCE的所述映射传送到所述协调节点包括带有枚举类型的一个PRB对信息元素(IE)中增强CCE (E-CCE)的数量，其中所述枚举类型表示一个PRB对中的集中式E-CCE的数量。
7. 如权利要求2所述的方法，其中将所述PRB中所述服务小区CCE或所述协调小区CCE的所述映射传送到所述协调节点包括带有位图的增强CCE (E-CCE)类型信息元素(IE)，其中所述位图中的每个位置表示E-CCE是集中式还是非集中式。
8. 如权利要求1所述的方法，还包括：
在下行链路中将所述服务小区ePDCCH传送到所述无线装置，其中与所述协调小区ePDCCH相关联的资源元素(RE)被留空。
9. 一种计算机程序，包括适用于执行如权利要求1所述的方法的计算机程序代码部件。
10. 一种配置成传递在物理资源块(PRB)中为多个小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的节点的节点装置，包括：
收发器模块，配置成与无线装置进行通信，并且发送与在PRB中服务小区ePDCCH相关联的服务小区控制信道元素(CCE)和在所述PRB中协调小区ePDCCH中的协调小区CCE的映射。
11. 如权利要求10所述的节点装置，还包括：
处理模块，配置成映射所述PRB中所述服务小区CCE和所述协调小区CCE；以及
其中收发器模块还配置成与协调节点进行通信，并且传送或接收所述服务小区CCE或所述协调小区CCE的所述映射。
12. 如权利要求10所述的节点，其中所述收发器模块还配置成接收定义如下的相对窄带传送器功率(RNTP)指示：
其中是在考虑的将来时间间隔中在天线端口p上子PRB中不包含参考信号(RS)的正交频分复用(OFDM)符号中，每用户设备特定（UE特定）物理下行链路共享信道(PDSCH)资源元素(RE)的资源元素(EPRE)的最大预期能量，是子物理资源块号，采用以下值之一，以分贝[dB]为单位，并且，其中是节点最大输出功率，以及是副载波间隔，是以的倍数表示的下行链路带宽配置，是以副载波的数量表示的频率域中资源块大小，以及是所述PRB中的子物理资源块(SRB)，其中，。
13. 如权利要求10所述的节点装置，其中所述PRB中所述服务小区CCE或所述协调小区CCE的所述映射包括带有位图的ePDCCH信息元素(IE)中每增强CCE (E-CCE)的相对窄带传送器功率(RNTP)，其中所述位图中的每个位置表示E-CCE索引值，用于其的比特值表示RNTP ()，其中索引与从0到编号的E-CCE集相关联，其中，是用于子帧k的E-CCE的总数，并且RNTP ()是E-CCE索引的函数。
14. 如权利要求10所述的节点，其中所述服务小区CCE和所述协调小区CCE每个在单PRB对中映射，其中所述PRB对位于配置成携带多个ePDCCH的相同子帧内，并且所述PRB对中所述服务小区CCE或所述协调小区CCE的所述映射包括至少以下之一：
带有位图的ePDCCH PRB对分配信息元素(IE)，其中所述位图中的每个位置表示一个PRB对是否分配为ePDCCH；
带有枚举类型的一个PRB对信息元素(IE)中的增强CCE (E-CCE)的数量，其中所述枚举类型表示在一个PRB对中集中式E-CCE的数量；以及
带有位图的增强CCE (E-CCE)类型信息元素(IE)，其中所述位图中的每个位置表示E-CCE是集中式还是非集中式。
15. 一种包括计算机程序代码部件的计算机程序，所述计算机程序代码部件适用于在无线装置执行用于使用在物理资源块(PRB)中为多个协调小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的方法，包括：
在无线装置从节点接收在PRB中的ePDCCH中用于小区的控制信道元素(CCE)，其中所述PRB配置成携带多个ePDCCH，并且每个ePDCCH对应于用于所述多个协调小区中单独小区的至少一个CCE；以及
从来自所述PRB的ePDCCH配置信息生成干扰协方差矩阵，其中所述干扰协方差矩阵包括协调小区干扰。
16. 如权利要求15所述的计算机程序，其中与用于协调小区的ePDCCH相关联的资源元素(RE)被留空，所述CCE是集中式CCE，并且所述ePDCCH是集中式ePDCCH或分布式ePDCCH。
17. 一种配置成接收在物理资源块(PRB)中为多个协调小区的小区间干扰协调(ICIC)配置的增强物理下行链路控制信道(ePDCCH)的无线装置，包括：
收发器模块，配置成接收在PRB中的ePDCCH中用于小区的控制信道元素(CCE)，其中所述PRB配置成携带多个ePDCCH，并且每个ePDCCH与用于所述多个协调小区中单独小区的至少一个CCE相关联。
18. 如权利要求17所述的无线装置，其中与用于协调小区的ePDCCH相关联的资源元素(RE)被留空，并且用于所述ePDCCH中小区的所述CCE映射在PRB对中，其中相同子帧内的所述PRB对配置成携带多个ePDCCH。
19. 如权利要求17所述的无线装置，还包括：
带干扰抑制合并的最小均方误差(MMSE-IRC)接收器，配置成从来自所述PRB对的ePDCCH配置信息生成干扰协方差矩阵，其中所述干扰协方差矩阵包括协调小区干扰。
20. 如权利要求17所述的无线装置，其中所述无线装置从由用户设备(UE)和移动台(MS)组成的群组中选择，并且所述无线装置包括天线、触敏显示屏幕、扬声器、麦克风、图形处理器、应用处理器、内部存储器、非易失性存储器端口及其组合至少之一。
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