CN105337652B - 用于映射增强物理下行链路控制信道的系统和方法 - Google Patents
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Abstract
公开用于将增强物理下行链路控制信道映射到无线电帧中的物理资源块的技术。一个方法包括将ePDCCH中的调制符号映射到至少一个控制信道元素。该至少一个控制信道元素可以映射到定位在子帧中的多个分布式物理资源块中的资源元素,其中每个资源块通过子帧中的至少一个额外资源块而分离。映射还可以是到分布在子帧中的单个资源块中的资源元素,其中控制信道元素被映射成相对于单个资源块中的其他映射资源元素在频率和时间上分布。
Description
优先权要求
要求于2011年7月1日提交的美国临时专利申请序列号61/504,054(代理机构卷号P38466Z)的优先权,并且通过引用它而结合于此。
背景技术
无线移动通信技术使用各种标准和协议以在基地收发器站(BTS)与无线移动设备之间传送数据。在第三代合作伙伴计划(3GPP)长期演进(LTE)系统中,BTS是通用地面无线电接入网络(UTRAN)中的演进节点B(eNode B或eNB)和无线电网络控制器(RNC)的组合,其与无线移动设备(也称为用户设备(UE))通信。数据经由物理下行链路共享信道(PDSCH)从eNode B传送到UE。物理下行链路控制信道(PDCCH)用于传输下行链路控制信息(DCI),其通知UE关于与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。在从eNode B传送到UE的每个子帧中,PDCCH可以在PDSCH之前被传送。
PDCCH信号设计成在UE处基于小区特定参考信号(CRS)而解调。然而,CRS的使用未考虑高级LTE系统增加的复杂性。例如,在异构网络中,多个节点可以同时在单个小区内传送。小区特定参考信号的使用可能限制用于提高小区容量的高级技术。
附图说明
本公开的特征和优势将从接着的结合附图来看的详细说明而变得明显,这些附图在一起通过示例图示本公开的特征;并且,其中:
图1图示根据示例示出对下行链路控制信息(DCI)执行的过程的框图;
图2图示根据示例示出对下行链路控制信息(DCI)执行的额外过程的框图;
图3图示根据示例的资源网格的框图;
图4图示根据示例映射到子帧的增强物理下行链路控制信道(ePDCCH)的框图;
图5图示根据额外的示例映射到子帧的增强物理下行链路控制信道(ePDCCH)的框图;
图6图示流程图,其描绘根据示例用于将增强物理下行链路控制信道(ePDCCH)映射到在无线电帧中的物理资源块的方法;
图7图示根据示例的移动通信设备的框图的示例。
现在将参考图示的示范性实施例,并且将在本文中使用特定语言来描述这些实施例。然而,将理解由此规定本发明的范围没有限制。
详细说明
在公开和描述本发明之前,要理解本发明不限于本文公开的特定结构、过程步骤或材料,而扩展到其等同物,如将由相关领域内普通技术人员认识到的。还应该理解本文采用的术语用于仅描述特定示例而不意在是限制性这样的目的。不同图中相同的标号代表相同的元件。
具体实施方式
在下文提供技术实施例的初步概述并且随后接着进一步详细描述特定技术实施例。该初步概述描述意在帮助读者更快地理解技术但不意在识别技术的关键特征或必要特征,也不意在限制要求保护的主旨的范围。为了清楚起见而提供下文描述的概述和实施例的下列定义。
在3GPP无线电接入网络(RAN)LTE系统中,传送站可以是演进通用地面无线电接入网络(E-UTRAN)节点B(通常也指示为演进节点B、增强型节点B、eNode B或eNB)和无线电网络控制器(RNC)的组合,其与称为用户设备(UE)的无线移动设备通信。下行链路(DL)传送可以是从传送站(例如,eNode B)到无线移动设备(或UE)的通信,并且上行链路(UL)传送可以是从无线移动设备到传送站的通信。
在同构网络中,传送站(也称为宏节点)可以向小区中的无线设备提供基本无线覆盖。引入异构网络(HetNet)来处理由于无线设备的使用和功能性增加所引起的宏节点上业务负荷的增加。HetNet可以包括用较低功率节点(微eNB、微微eNB、毫微微eNB或家庭eNB[HeNB])层覆盖的规划的高功率宏节点(或宏eNB)层,这些较低功率节点可以以不太精心计划或甚至完全不协调的方式部署在宏节点的覆盖区域内。宏节点可以用于基本覆盖,并且低功率节点可以用于填充覆盖洞以便提升高使用位点中或宏节点覆盖区域之间的边界处的容量以及在建筑结构妨碍信号传送的地方提高室内覆盖。
HetNet的部署可以提高数据(例如在物理下行链路共享信道(PDSCH)上传递的数据)传送到小区中的UE的效率。效率可以通过另外借助于低功率节点将小区分成较小的区域而得以提高。
PDSCH上数据的传递经由控制信道(称为物理下行链路控制信道(PDCCH))来控制。PDCCH可以用于下行链路(DL)和上行链路(UL)资源指派、传送功率命令和寻呼指标(pagingindicator)。下行链路PDSCH调度授予可以被指定给特定UE用于专用PDSCH资源分配以便运送UE特定业务,或它可以被指定给小区中的所有UE用于公用PDSCH资源分配以便运送例如系统信息或寻呼等广播控制信息。
在PDCCH上运送的数据称为下行链路控制信息(DCI)。存在对DCI消息而定义的若干传统格式。定义的格式包括:
格式0,用于传送上行链路共享信道(UL-SCH)分配;
格式1,用于对单输入多输出(SIMO)操作传送下行链路共享信道(DL-SCH)分配;
格式1A,用于对于SIMO操作的DL-SCH分配的紧凑型传送或将专用前导签名分配给UE用于随机接入;
格式1B,用于基于多输入多输出(MIMO)秩1的紧凑型资源指派的传送控制信息;
格式1C,用于PDSCH指派的非常紧凑型传送;
格式1D,与格式1B相同而具有功率补偿(power offset)的额外信息;
格式2和格式2A,分别用于传送对于闭环和开环MIMO操作的DL-SCH分配;以及
格式3和3A,用于传送对于上行链路信道的TPC命令。
该列表未意在为完整的。还可使用额外的格式。当无线网络的复杂性增加(例如使用具有多个不同类型的节点的HetNet)时,可以创建其他格式来运送期望的下行链路控制信息。
可以在无线电帧的一个子帧中调度多个UE。因此,多个DCI消息可以使用多个PDCCH来发送。PDCCH中的DCI信息可以借助一个或多个控制信道元素(CCE)来传送。CCE由一组资源元素组(REG)组成。遗留CCE可以包括多至九个REG。每个REG由四个资源元素组成。在使用正交调制时,每个资源元素可以包括两位的信息。因此,遗留CCE可以包括多至72位的信息。当需要超过72位的信息来输送DIC消息时,可以采用多个CCE。多个CCE的使用称为聚合度。3GPP LTE版本8、9和10将聚合度定义为分配给一个PDCCH的1、2、4或8个连续CCE。
为了创建PDCCH有效载荷,DCI可以经受若干过程,如在图1中图示的。这些过程可以包括如下项的附件:用于DCI消息中错误检测的循环冗余检查102;供在前向纠错中使用的信道编码104,和用于输出具有期望编码速率的位流的速率匹配106。用于执行循环冗余检查、信道编码和速率匹配的详细指令在3GPP LTE规范(例如版本8、9和10)中提供。
对于每个控制信道的编码DCI消息然后可以在经历调制、层映射、预编码和资源映射之前被复用和置乱,如在图2的框图中图示的。
对于每个控制信道的编码位的块可以被复用202以便创建数据块。可更改这些数据块的大小来确保PDCCH在期望的CCE位置处开始。还可更改数据块的大小来确保位的块与可以被PDCCH使用的REG的数量匹配。复用的位块然后可以被置乱。当前使用的一个置乱过程是使用具有小区特定置乱序列的逐位XOR操作。也可使用其他类型的置乱。编码过程在3GPP LTE规范中概述。
置乱位然后可以经历调制204。正交相移键控(QPSK)通常用于创建复值化调制符号的块。还可以使用其他类型的调制,例如双相移键控(BPSK)、16正交调幅(16-QAM)、32-QAM、64-QAM等等。
根据在eNode B处使用的传送天线的数量,复杂符号可以映射206到多个层。一、二或四层映射已经在遗留系统中使用。还可以使用额外的层,例如八层映射。映射过程在3GPPLTE规范中概述。
预编码器208可从层映射器206取块来对每个天线端口产生输出。可以基于3GPPLTE Rel.8规范而对遗留系统中的两个或四个天线执行对于传送多样性的预编码。对于更复杂的系统(例如具有八个天线的eNode B)的传送多样性也可以使用预编码来应用。用于预编码的一个常见方案包括对于两个天线的Alamouti方案。
对于每个天线的复值化符号然后可以分成用于映射210到资源元素的组。在遗留系统中,对于每个天线的复值化符号可以分成四组。该四组的集合然后可以在被映射到资源元素组内的资源元素之前经历例如交织和循环移位等置换。
在从eNode B传送到UE的每个子帧中,PDCCH可以在PDSCH之前被传送。PDCCH在UE处的解调可以基于小区特定参考信号(CRS)。对每个小区仅指派单个参考信号。然而,单个CRS的使用可以限制可以部署在小区中的节点的数量。
UE可以使用盲解码来接收PDCCH。由UE用于PDCCH盲解码所使用的资源可以称为搜索空间。相对于使用CRS,不同的搜索空间可以用于检测并且解调PDCCH以便获得UE特定参考信号(UE-RS)。
用于输送PDCCH的物理(PHY)层上的信号可以由eNode B(增强节点B或演进节点B或eNB)使用通用长期演进(LTE)帧结构传送到用户设备(UE),如在图3中图示的。在图3的图示中,图示遗留PDCCH。
无线电帧300可以具有10毫秒(ms)的持续时间Tf。每个无线电帧可以分割或分成十个子帧310i,其每个是1ms长。每个子帧可以进一步细分成两个时隙320a和320b,每个具有0.5ms的持续时间Tslot。在遗留系统中,第一时隙(#0)320a可以包括物理下行链路控制信道(PDCCH)360和物理下行链路共享信道(PDSCH)366,并且第二时隙(#2)320b可以包括使用PDSCH的数据。对于由eNode B和UE使用的分量载波(CC)的每个时隙可以基于CC频率带宽而包括多个资源块(RB)330a、330b、330i、330m和330n。
每个RB 330i可以包括12-15kHz子载波336(在频率轴上)和每子载波6或7个正交频分复用(OFDM)符号332(在时间轴上)。在一个实施例中,如果采用短或正常的循环前缀,RB可以使用七个OFDM符号。在另一个实施例中,如果使用扩展的循环前缀,RB可以使用六个OFDM符号。资源块可以使用短或正常的循环加前缀而映射到84个资源元素(RE)340i,或资源块可以使用扩展的循环加前缀而映射到72个RE(未示出)。RE可以是一个OFDM符号342乘以一个子载波(即,15kHz)346的单元。每个RE可以使用QPSK传送两位350a和350b的信息。每RE传递的位的实际数量取决于使用的调制的水平。
在载波聚合中每个遗留服务小区的控制区域由一组CCE组成。在一个实施例中,CCE可以从0编号到NCCE,K-1,其中NCCE,K是子帧k的控制区域中CCE的总数量。UE可以监视一个或多个激活的服务小区上的PDCCH候选者的集合,如由对于控制信息的较高层信令配置的。如本文使用的术语监视暗指在UE处尝试根据被监视的所有DCI格式对集合中的PDCCH候选者中的每个解码。
物理控制信道可以在一个或几个CCE聚合上传送。CCE传统上已经被连续传送。如之前论述的,遗留控制信道元素对应于9个资源元素组(REG)。每个遗留REG由四个资源元素组成。在一个实施例中,未指派给物理控制格式指标信道(PCFICH)或物理混合自动重发请求(ARQ)指标信道(PHICH)的REG的数量指定为NREG。在3GPP LTE系统中可用的CCE可以从0编号到NCCE-1,其中NCCE=(NREG/9)。PDCCH可以支持多个格式。多个PDCCH可以在子帧中传送。
PDCCH格式的一个示例在下面的表中提供。
PDCCH格式 | CCE的数量 | 资源元素组的数量 | PDCCH位的数量 |
0 | 1 | 9 | 72 |
1 | 2 | 18 | 144 |
2 | 4 | 36 | 288 |
3 | 8 | 72 | 576 |
表1
当前描述的PDCCH传送和映射过程(如由3GPP LTE版本8、9和10规范描述的)可以形成对在无线通信的其他区域中取得的进展形成限制。例如,CCE到OFDM符号中的子帧的映射典型地在控制区域上扩展来提供空间多样性。然而,在当前映射规程情况下,射束形成多样性是不可能的。另外,与邻近小区的干扰协调典型地使用当前映射规程而是不可能的,因为在相邻小区之间无法保证正交性,由此导致出现潜在的子载波碰撞。
此外,遗留PDCCH设计的容量对于未来网络可能是不足的。例如,未来网络可以是配置的HetNet,其可以在单个宏小区服务区中包括若干不同种类的传送节点。更多的UE可以同时由HetNet中的宏和微微小区服务。3GPP LTE Rel.8PDCCH设计成基于小区特定参考信号来解调,这使得难以完全利用小区划分增益。PDCCH设计可能不足以输送使UE能够利用HetNet中的多个传送节点来在UE减少电池使用以及增加带宽所需要的信息。
另外,多播\广播单频网络中多用户多输入多输出(MU-MIMO)、机器到机器通信(M2M)、PDSCH传送的使用和载波聚合中的跨载波调度可能对于PDCCH需要提高的容量。UE处PDCCH解调中UE特定参考信号的使用可以允许使用HetNet中的多个节点。每个参考符号可以是UE特定的,而不是依靠对于整个小区的单个公用参考符号。
因此,扩展PDCCH(ePDCCH)可以配置有提高的容量来允许蜂窝网络设计中的进展并且使当前已知的挑战最小化。将提供ePDCCH设计和映射原理的几个示例。这些示例不意在为限制性的。因为ePDCCH的广泛设计方面,其包括但不限于CRC附连、信道编码、速率匹配、复用、置乱、调制、层映射、预编码、资源映射和搜索空间要求,提供的示例不意在提供完整的系统。然而,示例可以提供改进,在这些改进上来详述ePDCCH设计和实现的其他方面。
图4提供映射到CCE内的ePDCCH的一个示例,其中CCE映射到子帧中的资源元素。在该示例中,每个资源块配对可以包括两个资源块,每个具有定位在无线电帧的子帧中的第一和第二时隙中的相同子载波,如在图3中示出的。每个资源块可以包括一个CCE。该CCE可以在资源块内的限定位点中。然而,CCE可包括资源元素组(REG),其定位在整个资源块中。每个REG可包括四个资源元素。然而,基于系统要求,REG可包括更多或更少的资源元素。在该示例中,定位在REG中的资源元素在频率和时间中的至少一个上邻接。CCE中REG的数量可以是固定数字,例如九个。备选地,REG的数量可基于DCI数据负载要求(即,DCI数据的量)或资源块中的其他竞争要求(例如对于每个资源块内分配的数据的PCFICH要求、PHICH要求和资源符号要求)而变化。在一个实施例中,信道控制元素可以映射到子帧中的单个资源块配对中的资源元素。控制信道元素可以在频率和时间上映射到单个资源块配对中的资源元素。在资源块配对中控制信道元素所映射到的资源元素可在时间和/或频率上邻接。备选地,资源元素可在时间和/或频率上分离。控制信道元素可跨物理资源块配对中的时隙边界而映射。
在图4中,示出具有聚合度(AGL)一的局部化(localized)ePDCCH 402。该局部化ePDCCH可以映射到单个CCE,其可以映射到单个资源块,如可以意识到的。相似地,具有聚合度二的局部化ePDCCH 404可映射到资源块中的两个邻接CCE。然而,这可以导致如在遗留系统中存在的相同挑战中的许多挑战,例如不能形成随机射束形成多样性、没有与相邻小区的干扰协调等等。
为了克服这些问题,可使用的一个过程是将ePDCCH映射到一个或多个CCE。CCE然后可以映射到不同资源块中的多个REG。REG的频率分离可以提供频率多样性增益。CCE中的每个REG可映射到独立资源块,但超过一个REG可映射到与另一个REG相同的资源块。REG的分布越广泛,可能出现的多样性增益越大。
在一个实施例中,每个REG可以分布到资源块,这些资源块通过是PDCCH载波频率的相干带宽的至少五倍的频率而与包含对于CCE的REG的另一个资源块分离。然而,在频率上使REG分离的能力可以取决于特定信道概况和系统带宽。在相对窄的带宽可用的实例中,每个REG可仅通过是PDCCH载波频率的相干带宽的两倍而分离。在另一个实施例中,REG可通过单个资源块而与CCE中的另一个REG分离。总体上,每个REG可以在频率上尽可能地与CCE中其他REG分离来得到频率多样性。
图4包含具有聚合度一的分布式PDCCH 406的一个示例。聚合度一暗指DCI信息能够映射到单个CCE。CCE可包含9个REG。然而,更少或更大数量的REG可在每个CCE中使用。如果在DCI信息上使用与QPSK不同的调制方案,更大数量的RE和/或位可包含在每个REG中。CCE中的REG可以映射到子帧中的资源块,这些资源块根据信道概况和系统带宽而在频率上尽可能多地分离来提供频率多样性增益。相似地,对于CCE N 408的REG在频率上分布。CCE1和CCE N中的REG可在子帧的资源块之中具有相同的分布或不同的分布。尽管在分布式PDCCH 406和408中图示的REG每个示出为在资源块内的相同时间位置中,对于每个相应的CCE,这不是必须的。CCE 1和CCE N中的分布式REG可在资源块内的不同时间位点中。子帧中的每个CCE可具有相同数量的REG或不同数量的REG。
CCE中的REG在频率上到子帧中的不同资源块的分布可以提供频率多样性增益的增加。另外,不同的频率映射方案可以在相邻传送站中使用,这对于明显减少或消除在相邻传送站的小区边缘附近运行的移动设备所出现的潜在子载波碰撞。此外,频率分布式ePDCCH可以允许使用随机射束形成多样性来提供额外的增益,由此提高可以传递ePDCCH的距离和/或位速率。
图5提供用于将CCE映射到无线电帧的子帧中的资源元素和/或资源块的过程的另一个示例。分别具有聚合度1和2的局部化ePDCCH示例502、504可以与图4中的示例402、404大致上相似。在CCE 1中具有聚合度一的分布式ePDCCH 506示出为在频率和时间两者上分布。另外,REG分成子组,这些子组可以在资源块组内在时间和空间上分布。具有在时间和频率两者上分布的资源元素的REG可以称为分布式REG。
在一个实施例中,每个分布式REG可以包括从四到16个资源元素。每个资源元素可包括从1到8个位。分布式REG中的资源元素映射到资源块和/或资源块配对中的选择的位点。在一个实施例中,分布式REG中的资源元素中的全部可以包含在相同的资源块中。备选地,分布式REG中的资源元素可映射到子帧中的超过一个资源块配对。
在一个示例中,可以使用遗留PDCCH映射值。分布式ePDCCH 506可包括九个REG,其每个包含四个资源元素,其中每个资源元素包含两个位。分布式ePDCCH可以映射到九个独立资源块,其中每个资源块包括一个分布式REG。每个分布式REG可以包括四个资源元素,其分布在整个资源块中。对于具有较大聚合度的PDCCH,该PDCCH可以映射到可以相似地分布的额外的CCE。相同资源块中的相同CCE中的预编码器可以应用于REG来实现一定的随机射束形成,由此提供空间多样性增益。UE还可以利用这种结构以在取决于UE自身的移动性的不同搜索空间类别中解码。这可以用于减少盲解码尝试。该示例不意在为限制性的。如之前论述的,ePDCCH中的CCE可以包括较大(或较少)数量的REG,根据使用的调制类型,每个REG可包含较大数量的资源元素,并且每个资源元素可包含较大数量的位。
用于监视的ePDCCH候选者的集合从搜索空间方面来定义,其中在聚合度L∈{1,2,4,8}的搜索空间由ePDCCH候选者的集合定义。对于在其上监视ePDCCH的每个服务小区,对应于搜索空间的ePDCCH候选者m的CCE由以下给出:
其中Yk定义如下,i=0,…,L-1。对于公用搜索空间m'=m。如果对于UE特定搜索空间的监视UE配置有载波指标字段,则m′=m+M(L)·nCI,其中nCI是载波指标字段值。如果对于UE特定搜索空间的监视UE未配置有载波指标字段,则m'=m,其中m=0,…,M(L)-1。M(L)是用于在给定搜索空间中监视的ePDCCH候选者的数量。
可以配置UE特定搜索空间,其考虑低移动性和高移动性UE两者。高移动性UE可以具有较大的多普勒频移、更经常地在小区之间移动并且需要与eNode B更频繁的数据交换以便维持例如参考信号信息等的新数据。
对于低移动性,频率调度增益可以使用局部化ePDCCH搜索空间候选者(例如图4中的局部化ePDCCH 402和404)来实现。对于高移动性,搜索空间候选者可以跨OFDMA信号中的不同频率子带而广泛分布,例如在图4中的分布式ePDCCH 406和408中或在图5中的506中。搜索空间候选者在OFDMA信号中的广泛分布可以提供由于接收从UE到eNode B的可靠信道状态信息反馈而引起的调度增益。对于高移动性,搜索空间可以配置成允许利用对于ePDCCH的UE特定参考信号来实现开环(OL)多输入多输出(MIMO)。
基于在图4和5中图示的示例,可以得到对于ePDCCH的若干设计原理。ePDCCH可以映射到一个或多个控制信道元素。当一个ePDCCH映射到多个CCE时,每个CCE可用于对ePDCCH解码。一个CCE可以映射到一个物理资源块(RB)或RB配对内的资源元素。一个CCE可以映射到在频域中相距相对远的分布式资源块。局部化ePDCCH可以映射到多个局部化CCE。这些局部化CCE可以映射在一个资源块内,或映射到在频域中邻接的多个资源块。分布式ePDCCH可以映射到一个CCE或多个分布式CCE。局部化CCE可以映射到分布式资源块,这些分布式资源块基于信道、系统带宽和其他系统考量而在频域中彼此尽可能相距远地分布,如可以意识到的。一个子帧可以包含局部化CCE、分布式CCE或两者。一个物理资源块还可以包含局部化CCE或分布式CCE的一部分或两者。CCE所映射到的资源元素可以排除被指派给参考符号或其他开销的那些资源元素。
在小区特定参考信号端口、解调特定参考信号端口、信道状态信息参考信号端口的数量在资源块中由较高层(例如无线电资源控制(RRC)信令)配置后,CCE可以基于为ePDCCH传送而指派的资源块中的可用资源元素而指数化。
在一个实施例中,对于从相对低移动性UE接收的ePDCCH信号,局部化CCE可以基于按频率的顺序而指数化,如在图1中图示的。在另一个实施例中,对于从相对高移动性UE接收的ePDCCH信号,CCE可以对于资源元素而指数化,这些资源元素是以下中的任一个:在时间或频率上邻接,如在图1中示出的;或在时间和频率上分布,如在图2中示出的。图2中分布式REG的使用可以提供更多的多样性增益,尤其对于具有低聚合度的ePDCCH是如此。对于高移动性UE,CCE可以对于资源元素而指数化,如之前对于图4中的分布式PDCCH406和408论述的。
在一个实施例中,CCE可以指数化到REG,其根据它们的功能而分成两个类别:对于低移动性的一个REG集合,和对于高移动性的另一个REG集合。对于每个类别,搜索空间可以在在聚合度Λ的ePDCCH候选者m=0,1,...M(Λ)-1包括用编号的CCE的情况下定义,其中是对于所选类别的CCE总数量,i=0,1,...,Λ-1并且M(Λ)是基于聚合度Λ的ePDCCH候选者的数量。基于聚合度的ePDCCH候选者的一个示例在下文在表2中示出。还可采用额外的基于聚合度的ePDCCH候选者,如可以意识到的。
聚合度∧ | ePDCCH候选者的数量M(∧) |
1 | 6 |
2 | 6 |
4 | 2 |
8 | 2 |
表2
在一个示例中,图6提供流程图,其描绘用于将增强物理下行链路控制信道(ePDCCH)映射到无线电帧中的物理资源块的方法。该方法包括将ePDCCH中的调制符号映射到至少一个控制信道元素,如在框610中示出的。该至少一个控制信道元素可以映射620到以下中的至少一个:定位在子帧中的多个物理资源块中的资源元素,其中每个资源块通过子帧中的至少一个额外资源块而分离;和分布在子帧中的单个资源块中的资源元素,其中控制信道元素被映射成相对于单个资源块中的其他映射资源元素而在频率和时间上分布,如分别在框630和640中示出的。方法600进一步包括对控制数据应用映射来形成ePDCCH,其配置成从增强节点B传递到UE,如在框650中示出的。
方法600还可以包括将至少一个控制信道元素映射到子帧中的单个资源块配对中的资源元素。控制信道元素可以在频率和时间上分布到单个资源块配对中的资源元素。另外,ePDCCH中的调制符号可以映射到单个资源块配对,其中控制信道元素跨物理资源块配对中的时隙边界而映射。
方法600中的另一个示例包括将至少一个控制信道元素映射到定位在子帧中的多个物理资源块中的资源元素,其中每个资源块在频率上邻接。至少一个控制信道元素可以映射到定位在子帧中的资源元素并且映射到子帧中的单个资源块。单个资源块可以包含控制信道元素所映射到的在频率和时间上分布的资源元素和邻接的资源元素。
方法600进一步包括将局部化ePDCCH中的符号映射到多个控制信道元素;并且将这些多个控制信道元素映射到在子帧中邻接的物理资源块。至少一个控制信道元素可以映射到定位在子帧中的多个物理资源块中的资源元素。资源元素可以分组成多个资源元素组。每个资源元素组可以由在时间和频率中的至少一个上邻接的四个资源元素组成。
方法600还包括在多个物理资源块中之一以及单个资源块中形成分布式资源元素组。每个分布式资源元素组由在资源块内在时间和频率上分布的至少四个资源元素组成。
方法600另外包括形成被映射到无线电帧的子帧中的资源块中的资源元素的至少一个控制信道元素的个体指数。还公开了被映射到子帧中的资源块中的资源元素的至少一个控制信道元素的全局指数。
在另一个实施例中,公开物品。该物品包括非暂时性计算机可读存储介质,其包含指令,这些指令如果被处理器执行则使系统能够对控制数据应用映射,该控制数据能操作成形成扩展物理下行链路控制信道(ePDCCH),其配置成在无线电帧中从增强节点B(eNB)传递到用户设备(UE)。该映射通过将ePDCCH中的调制符号映射到至少一个局部化控制信道元素和至少一个分布式控制信道元素中的至少一个而形成,其中:至少一个局部化控制信道元素被映射在物理资源块或在无线电帧的子帧上的频域中邻接的多个物理资源块内;并且至少一个分布式控制信道元素被映射到无线电帧的子帧中的至少一个物理资源块中的分布式资源元素。
物品可以进一步包括指令,其在被处理器执行时使系统能够对控制数据应用映射,该控制数据能操作成形成ePDCCH,其配置成在无线电帧中从eNB传递到UE。该映射可以通过将ePDCCH中的调制符号映射到至少一个分布式控制信道元素而形成,该至少一个分布式控制信道元素被映射到在子帧中在频率上分布的多个局部化物理资源块。
物品可以进一步包括指令,其在被处理器执行时使系统能够对控制数据应用映射,该控制数据能操作成形成ePDCCH,其配置成在无线电帧中从eNB传递到UE。该映射可以通过将该至少一个局部化控制信道元素和该至少一个分布式控制信道元素映射到无线电帧的子帧中的物理资源块而形成。子帧可以包括该至少一个映射的分布式控制信道元素和映射的局部化控制信道元素中的至少一个。
物品可以进一步包括指令,其在被处理器执行时使系统能够对控制数据应用映射,该控制数据能操作成形成ePDCCH,其配置成在无线电帧中从eNB传递到UE。该映射可以通过将该至少一个局部化控制信道元素和该至少一个分布式控制信道元素映射到无线电帧的子帧中的物理资源块而形成,其中该至少一个物理资源块包括该映射的局部化控制信道元素中的至少一个和该映射的分布式控制信道元素中的至少一个。
在另一个实施例中,公开一种设备,其包括增强节点B(eNB),该增强节点B能操作成对控制数据应用映射,该控制数据能操作成形成扩展物理下行链路控制信道(ePDCCH),其配置成在无线电帧中传递到用户设备(UE)。该映射通过将ePDCCH中的调制符号映射到至少一个局部化控制信道元素和至少一个分布式控制信道元素中的至少一个而形成,其中:该至少一个局部化控制信道元素映射在物理资源块或在无线电帧的子帧上的频域中邻接的多个物理资源块内;并且该至少一个分布式控制信道元素映射到无线电帧的子帧中的至少一个物理资源块中的分布式资源元素。
在另一个实施例中,eNB可以进一步配置成对控制数据应用映射,该控制数据能操作成形成ePDCCH,其配置成在无线电帧中从eNB传递到UE。该映射可以通过将ePDCCH中的调制符号映射到至少一个分布式控制信道元素而形成,该至少一个分布式控制信道元素被映射到在子帧中在频率上分布的多个局部化物理资源块。
在另一个实施例中,eNB可以进一步配置成对控制数据应用映射,该控制数据能操作成形成ePDCCH,其配置成在无线电帧中从eNB传递到UE。该映射可以通过将该至少一个局部化控制信道元素和该至少一个分布式控制信道元素映射到无线电帧的子帧中的物理资源块而形成,其中子帧包括映射的局部化控制信道元素和映射的分布式控制信道元素中的至少一个。
在另一个实施例中,eNB可以进一步配置成对控制数据应用映射,该控制数据能操作成形成ePDCCH,其配置成在无线电帧中从eNB传递到UE。该映射可以通过将该至少一个局部化控制信道元素和该至少一个分布式控制信道元素映射到无线电帧的子帧中的物理资源块而形成,其中物理资源块包括映射的局部化控制信道元素中的至少一个和映射的分布式控制信道元素中的至少一个。
图7提供例如用户设备(UE)、移动台(MS)、移动无线设备、移动通信设备、平板电脑、手机或其他类型的移动无线设备等无线设备的示例图示。该无线设备可以包括一个或多个天线,其配置成与基站(BS)、演进节点B(eNB)或其他类型的无线广域网(WWAN)接入点通信。尽管示出两个天线,移动设备可具有在一个和四个或以上之间的天线。无线设备可以配置成使用至少一个无线通信标准(其包括第三代合作伙伴计划长期演进(3GPP LTE)、全球微波接入互通(WiMAX)、高速分组接入(HSPA)、蓝牙、WiFi或其他无线标准)来通信。移动设备可以对每个无线通信标准使用独立天线或对多个无线通信标准使用共享天线来通信。移动设备可以在无线局域网(WLAN)、无线个人区域网(WPAN)和/或无线广域网(WWAN)中通信。
图7还提供可以用于对移动设备的音频输入和从移动设备的音频输出的麦克风和一个或多个扬声器的图示。显示屏可以是液晶显示器(LCD)屏或其他类型的显示屏,例如有机发光二极管(OLED)显示器。显示屏可以配置为触摸屏。触摸屏可使用电容式、电阻式或另一个类型的触摸屏技术。应用处理器和图形处理器可以耦合于内部存储器来提供处理和显示能力。非易失性存储器端口还可以用于向用户提供数据输入/输出选项。非易失性存储器端口还可以用于扩展移动设备的存储能力。键盘可与无线设备集成或无线连接到无线设备来提供额外的用户输入。还可以使用触摸屏来提供虚拟键盘。
应该理解在该说明书中描述的功能单元中的许多功能单元已经标记为模块,以便更特定地强调它们的实现独立性。例如,模块可实现为硬件电路,其包括定制VLSI电路或门阵列、例如逻辑芯片、晶体管或其他分立部件等现成半导体。模块还可在例如现场可编程门阵列、可编程阵列逻辑、可编程逻辑设备或类似物等可编程硬件设备中实现。
模块还可在软件中实现以供各种类型的处理器执行。可执行代码的所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,其例如可组织为对象、规程或功能。然而,识别的模块的可执行文件不必在物理上定位在一起,而可包括存储在不同位点中的全异指令,其在逻辑上联接在一起时构成模块并且实现模块的规定目的。
实际上,可执行代码的模块可以是单个指令或许多指令,并且甚至可分布在若干不同的代码段上、不同程序之间以及跨若干存储器设备而分布。相似地,可识别操作数据并且在本文在模块内图示操作数据,并且操作数据可采用任何适合的形式体现以及在任何适合类型的数据结构内组织。操作数据可作为单个数据集而收集,或可分布在不同位点上,包括分布在不同存储设备上,并且可至少部分地仅作为系统或网络上的电子信号而存在。模块可以是被动或主动的,其包括能操作成进行期望的功能的代理。
在该整个说明书中对“示例”的引用意指连同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。从而,在该整个说明书中在各种地方出现的短语“在示例中”不一定都指相同的实施例。
如本文使用的,为了方便,多个条目、结构元件、构成元件和/或材料可在公共列表中呈现。然而,这些列表应该解释为如同列表中的每个成员单独识别为独立且唯一的成员。从而,这样的列表中的个体成员不应仅基于它们在公共组中的呈现而没有相反指示的情况下解释为相同列表的任何其他成员的事实上的等同物。另外,本发明的各种实施例和示例连同其各种部件的备选可在本文中提及。理解到这样的实施例、示例和备选不解释为彼此的事实上的等同物,而要视为本发明的独立和自主表示。
此外,在一个或多个实施例中,描述的特征、结构或特性可采用任何适合的方式组合。在下面的描述中,提供许多特定细节,例如搜索空间的示例等,来提供对本发明的实施例的全面理解。然而,相关领域内技术人员将认识到本发明可在没有这些特定细节中的一个或多个的情况下实践,或用其他方法、部件、材料等实践。在其他实例中,未详细示出或描述众所周知的结构、材料或操作以避免混淆本发明的方面。
尽管上述示例在一个或多个特定应用中说明本发明的原理,可以在无需发明队伍的劳动并且不偏离本发明的原理和概念的范围的情况下在实现的形式、使用和细节中做出许多修改,这对于本领域内普通技术人员将是明显的。因此,规定本发明不受限制,而仅由下文阐述的权利要求来限制。
Claims (27)
1.一种用于在增强节点BeNB将增强物理下行链路控制信道ePDCCH映射到无线电帧中的物理资源块的方法,其包括:
在所述增强节点B将所述ePDCCH中的调制符号映射到至少一个控制信道元素CCE;
将所述至少一个控制信道元素映射到定位在子帧中多个分布式物理资源块中的资源元素;以及
对用于调度的控制数据应用所述映射来形成配置成从所述增强节点B传递到用户设备UE的ePDCCH。
2.如权利要求1所述的方法,其进一步包括将所述ePDCCH中的调制符号映射到至少一个连续的控制信道元素。
3.如权利要求1所述的方法,其进一步包括将所述至少一个控制信道元素映射到定位在多个分布式物理资源块中的资源元素,其中每个资源块由所述子帧中至少一个额外的资源块分隔。
4.如权利要求1所述的方法,其进一步包括将所述至少一个控制信道元素映射到定位在所述子帧中多个物理资源块中的资源元素,其中每个物理资源块在频率上邻接。
5.如权利要求1所述的方法,其进一步包括将所述至少一个控制信道元素映射到定位在所述子帧中多个物理资源块中的资源元素,以及映射到所述子帧中的单个物理资源块,其中所述单个物理资源块包含所述至少一个控制信道元素所映射到的在频率和时间上分布的资源元素和邻接的资源元素。
6.如权利要求1所述的方法,其进一步包括形成所述至少一个控制信道元素的个体指数,所述至少一个控制信道元素被映射到所述子帧中物理资源块中的资源元素。
7.如权利要求1所述的方法,其进一步包括在所述多个物理资源块中的一个中形成分布式资源元素组,其中每个分布式资源元素组由在时间和频率上分布的资源元素组成。
8.如权利要求1所述的方法,进一步包括对用于调度的控制数据应用所述映射来形成配置成从所述eNB传递到所述UE的ePDCCH,其中所述UE包括麦克风、音频扬声器、液晶显示器LCD屏、有机发光显示器屏OLED、触敏屏或者非易失性存储器端口。
9.一种增强节点B eNB,能操作成对控制数据应用映射,所述控制数据能操作成形成配置成在无线电帧中被传递到用户设备UE的增强物理下行链路控制信道ePDCCH,其中所述映射包括:
将所述ePDCCH中的调制符号映射到至少一个控制信道元素CCE;
将所述至少一个控制信道元素映射到子帧中的单个物理资源块中的资源元素;以及
对用于调度的控制数据应用所述映射来形成配置成从所述增强节点B传递到用户设备UE的ePDCCH。
10.如权利要求9所述的增强节点B,其中所述ePDCCH中的调制符号被映射到至少一个连续的控制信道元素。
11.如权利要求9所述的增强节点B,其中所述至少一个控制信道元素被映射到所述子帧中单个物理资源块对中的资源元素,其中所述控制信道元素在频率和时间上被映射到所述单个物理资源块对中的资源元素。
12.如权利要求11所述的增强节点B,其中所述ePDCCH中的调制符号被映射到所述单个物理资源块对,其中所述控制信道元素跨所述物理资源块对中的时隙边界来映射。
13.如权利要求9所述的增强节点B,其中所述至少一个控制信道元素被映射到定位在所述子帧中多个物理资源块中的资源元素以及映射到所述子帧中的单个物理资源块,其中所述单个物理资源块包含所述至少一个控制信道元素所映射到的在频率和时间上分布的资源元素和邻接的资源元素。
14.如权利要求9所述的增强节点B,进一步包括被映射到所述子帧中的物理资源块中的资源元素的所述至少一个控制信道元素的个体指数。
15.如权利要求9所述的增强节点B,其中所述ePDCCH配置成从所述eNB传递到所述UE,其中所述UE包括麦克风、音频扬声器、液晶显示器LCD屏、有机发光显示器屏OLED、触敏屏、或非易失性存储器端口。
16.一种非暂时性计算机可读存储介质,包含指令,所述指令如果被处理器执行则使得系统:
对能操作成形成配置成在无线电帧中从增强节点B eNB传递到用户设备UE的增强物理下行链路控制信道ePDCCH的控制数据应用映射,其中所述映射通过以下步骤来形成:
将所述ePDCCH中的调制符号映射到至少一个局部化的控制信道元素和至少一个分布式控制信道元素至少其中之一,其中:
所述至少一个局部化的控制信道元素被映射在所述无线电帧的子帧上的物理资源块或者频域上邻接的多个物理资源块内;以及
所述至少一个分布式控制信道元素被映射到所述无线电帧的子帧中至少一个物理资源块中的分布式资源元素。
17.如权利要求16所述的非暂时性计算机可读存储介质,进一步包括指令,在被处理器执行时使所述系统:
对操作成形成配置成在所述无线电帧中从所述增强节点B传递到所述UE的ePDCCH的控制数据应用映射,其中所述映射由以下步骤形成:
将所述ePDCCH中的调制符号映射到所述至少一个分布式控制信道元素,所述至少一个分布式控制信道元素被映射到在所述子帧中在频率上分布的多个局部化的物理资源块。
18.如权利要求16所述的非暂时性计算机可读存储介质,进一步包括指令,由处理器执行时,使所述系统:
对能操作成形成配置成在所述无线电帧中从所述增强节点B传递到所述UE的ePDCCH的控制数据应用映射,其中所述映射由以下步骤形成:
将所述至少一个局部化控制信道元素和所述至少一个分布式控制信道元素映射到所述无线电帧的子帧中的物理资源块,其中所述子帧包括映射的局部化控制信道元素和所述至少一个映射的分布式控制信道元素中的至少一个。
19.如权利要求16所述的非暂时性计算机可读存储介质,进一步包括指令,由处理器执行时,使得所述系统:
对能操作成形成配置成在所述无线电帧中从所述增强节点B传递到所述UE的ePDCCH的控制数据应用映射,其中所述映射由以下步骤形成:
将所述至少一个局部化控制信道元素和所述至少一个分布式控制信道元素映射到所述无线电帧的子帧中的物理资源块,其中所述物理资源块包括映射的局部化控制信道元素至少其中之一和映射的分布式控制信道元素至少其中之一。
20.一种用于在增强节点B eNB将增强物理下行链路控制信道ePDCCH映射到无线电帧中的物理资源块的装置,其包括:
用于在所述增强节点B将所述ePDCCH中的调制符号映射到至少一个控制信道元素CCE的部件;
用于将所述至少一个控制信道元素映射到定位在子帧中多个分布式物理资源块中的资源元素的部件;以及
用于对用于调度的控制数据应用所述映射来形成配置成从所述增强节点B传递到用户设备UE的ePDCCH的部件。
21.如权利要求20所述的装置,其进一步包括用于将所述ePDCCH中的调制符号映射到至少一个连续的控制信道元素的部件。
22.如权利要求20所述的装置,其进一步包括用于将所述至少一个控制信道元素映射到定位在多个分布式物理资源块中的资源元素的部件,其中每个资源块由所述子帧中至少一个额外的资源块分隔。
23.如权利要求20所述的装置,其进一步包括用于将所述至少一个控制信道元素映射到定位在所述子帧中多个物理资源块中的资源元素的部件,其中每个物理资源块在频率上邻接。
24.如权利要求20所述的装置,其进一步包括用于将所述至少一个控制信道元素映射到定位在所述子帧中多个物理资源块中的资源元素以及映射到所述子帧中的单个物理资源块的部件,其中所述单个物理资源块包含所述至少一个控制信道元素所映射到的在频率和时间上分布的资源元素和邻接的资源元素。
25.如权利要求20所述的装置,其进一步包括用于形成所述至少一个控制信道元素的个体指数的部件,所述至少一个控制信道元素被映射到所述子帧中物理资源块中的资源元素。
26.如权利要求20所述的装置,其进一步包括用于在所述多个物理资源块中的一个中形成分布式资源元素组的部件,其中每个分布式资源元素组由在时间和频率上分布的资源元素组成。
27.如权利要求20所述的装置,进一步包括用于对用于调度的控制数据应用所述映射来形成配置成从所述eNB传递到所述UE的ePDCCH的部件,其中所述UE包括麦克风、音频扬声器、液晶显示器LCD屏、有机发光显示器屏OLED、触敏屏或者非易失性存储器端口。
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