WO2013053322A1 - Communications method and user equipment for enhanced physical downlink control channel - Google Patents

Communications method and user equipment for enhanced physical downlink control channel Download PDF

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Publication number
WO2013053322A1
WO2013053322A1 PCT/CN2012/082753 CN2012082753W WO2013053322A1 WO 2013053322 A1 WO2013053322 A1 WO 2013053322A1 CN 2012082753 W CN2012082753 W CN 2012082753W WO 2013053322 A1 WO2013053322 A1 WO 2013053322A1
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pdsch
epdcch
information
occupied
preset
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PCT/CN2012/082753
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French (fr)
Chinese (zh)
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武雨春
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华为技术有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals

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  • the downlink control signaling DCI of the ePDCCH information includes resource size information indicating a physical downlink shared channel PDSCH; and acquiring a starting position of the PDSCH according to a preset ePDCCH location rule, The resource size information occupied by the PDSCH and the start position of the PDSCH are obtained by the PDSCH;

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Disclosed is a communications method for an enhanced physical downlink control channel (ePDCCH). The method comprises: receiving ePDCCH information, downlink control signaling DCI of the ePDCCH information comprising information indicating the magnitude of resources occupied by a physical downlink shared channel (PDSCH); obtaining a starting position of the PDSCH according to a preset ePDCCH position rule, and obtaining information of the resources occupied by the PDSCH in combination with the information of the magnitude of the resources occupied by the PDSCH and the starting position of the PDSCH; and demodulating the PDSCH at the resources occupied by the PDSCH. Correspondingly, the present invention further provides a user equipment for an ePDCCH. Implementation of the communications method and the user equipment provided in the present invention may reduce the computing amount of ePDCCH blind detection and the overhead of the control signaling, thereby increasing the system data throughput.

Description

用于增强物理下行控制信道的通信方法和用户设备  Communication method and user equipment for enhancing physical downlink control channel
技术领域 Technical field
本发明涉及通信领域，尤其涉及一种用于增强物理下行控制信道的通信方 法和用户设备。 背景技术  The present invention relates to the field of communications, and in particular, to a communication method and user equipment for enhancing a physical downlink control channel. Background technique
LTE Rel-11 ( Long Term Evolution, 3GPP长期演进）以前***的下行业务 数据传输中， 一个小区中的多个 UE ( User Equipment , 用户设备 )动态复用时 频资源， 某个 UE占用哪些时频资源由该 UE对应的 PDCCH ( Physical Downlink Control Channel, 物理下行控制信道） 来指示。 所有 UE的 PDCCH—般位于一 个子顿的前 1至 3个 OFDM ( Orthogonal Frequency Division Multiplexing，正交频 分复用）符号 （Symbol ) 中， 用于指示在当前子帧中各 UE的 PDSCH和其他信 令， 例如上行资源分配等信息， 其中一个子帧共包含 14个 OFDM Symbol, 时 长为 lms (毫秒)。 各 UE需要侦听的 PDCCH资源也是动态变化的， 各个 UE需要 进行高达 44次的盲检测来得到对应本 UE的 PDCCH信息，再进一步通过 PDCCH 得到对应本 UE的 PDSCH和其他信令信息。 由于 PDCCH有多种格式、 多个起始 位置、 多种编码后长度等而导致 PDCCH盲检测的运算量比较大。  LTE Rel-11 (Long Term Evolution, 3GPP Long Term Evolution) In the downlink service data transmission of the system, multiple UEs (User Equipments) in one cell dynamically multiplex time-frequency resources, and which time-frequency frequencies a certain UE occupies. The resource is indicated by a PDCCH (Physical Downlink Control Channel) corresponding to the UE. The PDCCHs of all UEs are generally located in the first 1 to 3 OFDM (Orthogonal Frequency Division Multiplexing) symbols of a sub-lot, and are used to indicate the PDSCH and other UEs in the current subframe. Signaling, such as information such as uplink resource allocation, where one subframe contains a total of 14 OFDM Symbols, and the duration is lms (milliseconds). The PDCCH resources that the UEs need to listen to are also dynamically changed. Each UE needs to perform up to 44 blind detections to obtain the PDCCH information corresponding to the UE, and further obtain the PDSCH and other signaling information corresponding to the UE through the PDCCH. Since the PDCCH has multiple formats, multiple starting positions, multiple encoding lengths, etc., the amount of computation for PDCCH blind detection is relatively large.
考虑到 PDCCH的容量对***吞吐量提高的限制， 3GPP提出 了 ePDCCH(Enhanced Physical Downlink Control Channel, 增强物理下行控制信 道)。 ePDCCH在原 R10的 PDCCH区域中新增一种主 PDCCH( Primary PDCCH ) , 它长度较短， 用于指示关于 ePDCCH的一些参数， 如解调 ePDCCH的的参数。 ePDCCH放在原 R10的 PDSCH区域， 它承载的内容和原 R10中 PDCCH承载的内 容类似， 长度较长， 包括 PDSCH所在资源指示， PDSCH对应的 PMI ( Precoding Matrix Indicator, 预编码矩阵索引） 、 RI ( Rank Indicator, 秩索引） 、 MCS ( Modulation and Coding Scheme, 调制与编码制式）、 HARQ( Hybrid Automatic Repeat Request, 混合自动重传请求 )等参数。 Primary PDCCH的位置一般比较 固定，不用盲检测或只需很小运算量的盲检测；而 ePDCCH盲检测运算量较大， 因而， 如何减少 ePDCCH盲检测量的运算量是目前亟需解决的问题。 发明内容 The 3GPP proposes an ePDCCH (Enhanced Physical Downlink Control Channel) to consider the limitation of the capacity of the PDCCH to the system throughput. The ePDCCH adds a primary PDCCH (Primary PDCCH) to the PDCCH region of the original R10, which is short in length and is used to indicate some parameters about the ePDCCH, such as parameters for demodulating the ePDCCH. The ePDCCH is placed in the PDSCH area of the original R10, and the content carried by the PDCCH is similar to the content carried by the PDCCH in the original R10, and the length is longer, including the resource indication of the PDSCH, the PMI (Precoding Matrix Indicator) corresponding to the PDSCH, and RI ( Rank) Indicator, rank index), MCS (Modulation and Coding Scheme), HARQ (Hybrid Automatic Repeat Request) and other parameters. The location of the primary PDCCH is generally fixed, and no blind detection or blind detection with a small amount of computation is required. The ePDCCH blind detection computation is large. Therefore, how to reduce the computational complexity of the ePDCCH blind detection is an urgent problem to be solved. Summary of the invention
本发明实施例为解决上述问题而提供了一种用于增强物理下行控制信道 的通信方法和用户设备， 可以减少 ePDCCH盲检测的运算量， 并可减少*** 控制信令的开销， 从而提高***的数据吞吐量。  In order to solve the above problem, the embodiment of the present invention provides a communication method and user equipment for enhancing a physical downlink control channel, which can reduce the computational complexity of ePDCCH blind detection, and can reduce the overhead of system control signaling, thereby improving the system. Data throughput.
本发明实施例提供了一种用于增强物理下行控制信道的通信方法，所述方 法包括：  An embodiment of the present invention provides a communication method for enhancing a physical downlink control channel, where the method includes:
接收增强物理下行控制信道 ePDCCH信息， 其中所述 ePDCCH信息的下 行控制信令 DCI包括指示物理下行共享信道 PDSCH所占资源大小信息； 根据预先设置的 ePDCCH位置规则获取 PDSCH的起始位置， 结合所述 PDSCH所占资源大小信息和所述 PDSCH的起始位置得到 PDSCH所占资源信 息；  Receiving an enhanced physical downlink control channel ePDCCH information, where the downlink control signaling DCI of the ePDCCH information includes resource size information indicating a physical downlink shared channel PDSCH; and acquiring a starting position of the PDSCH according to a preset ePDCCH location rule, The resource size information occupied by the PDSCH and the start position of the PDSCH are obtained by the PDSCH;
在所述 PDSCH所占资源处解调 PDSCH。  The PDSCH is demodulated at the resource occupied by the PDSCH.
相应地，本发明实施例还提供了一种用于增强物理下行控制信道的用户设 备， 所述用户设备包括：  Correspondingly, the embodiment of the present invention further provides a user equipment for enhancing a physical downlink control channel, where the user equipment includes:
接收单元， 用于接收增强物理下行控制信道 ePDCCH信息， 其中所述 ePDCCH信息的下行控制信令 DCI包括指示物理下行共享信道 PDSCH所占资 源大小信息；  a receiving unit, configured to receive an enhanced physical downlink control channel ePDCCH information, where the downlink control signaling DCI of the ePDCCH information includes resource size information indicating a physical downlink shared channel PDSCH;
确定单元，用于根据预先设置的 ePDCCH位置规则获取 PDSCH的起始位 置， 结合所述 PDSCH 所占资源大小信息和所述 PDSCH 的起始位置得到 PDSCH所占资源信息；  a determining unit, configured to acquire a starting position of the PDSCH according to the pre-set ePDCCH location rule, and obtain resource information occupied by the PDSCH according to the resource size information occupied by the PDSCH and the starting position of the PDSCH;
解调单元， 用于在所述 PDSCH所占资源处解调 PDSCH。  And a demodulation unit, configured to demodulate the PDSCH at a resource occupied by the PDSCH.
实施本发明实施例， 具有如下有益效果： 利用 ePDCCH和 PDSCH强相关特 性， 通过预先设置的 PDSCH位置和 ePDCCH位置对应关系获得 PDSCH起始位 置而无需在 ePDCCH中包含指示 UE的 PDSCH起始位置 bits, 这样可大大减少 ePDCCH盲检测的运算量， 又可以减少***控制信令的开销， 从而提高***的 数据吞吐量。 附图说明  The embodiments of the present invention have the following beneficial effects: the PDSCH start position is obtained by using the ePDCCH and the PDSCH strong correlation feature, and the PDSCH start position is not included in the ePDCCH, and the PDSCH start position bits are not included in the ePDCCH. This can greatly reduce the computational complexity of ePDCCH blind detection, and can reduce the overhead of system control signaling, thereby improving the data throughput of the system. DRAWINGS
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施 例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地， 下面描述 中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲， 在不付 出创造性劳动性的前提下， 还可以根据这些附图获得其他的附图。 In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the following description will be described. The drawings in the drawings are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive labor.
图 1 图示了根据本发明实施方式的用于增强物理下行信道的通信方法的 流程示意图。  FIG. 1 illustrates a flow chart of a communication method for enhancing a physical downlink channel according to an embodiment of the present invention.
图 2 图示了根据本发明实施方式的用于增强物理下行信道的子帧信息的 结构示意图。  2 is a block diagram showing the structure of subframe information for enhancing a physical downlink channel according to an embodiment of the present invention.
图 3 图示了根据本发明实施方式的用于增强物理下行信道的用户设备的 结构示意图。 具体实施方式  FIG. 3 illustrates a schematic structural diagram of a user equipment for enhancing a physical downlink channel according to an embodiment of the present invention. detailed description
下面将结合本发明实施例中的附图 ,对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实施例， 而不是 全部的实施例。基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。  BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.
参见图 1 , 图示了根据本发明实施方式的用于增强物理下行信道的通信方 法的流程示意图， 该通信方法的具体步骤可包括：  Referring to FIG. 1, a schematic flowchart of a communication method for enhancing a physical downlink channel according to an embodiment of the present invention is illustrated. The specific steps of the communication method may include:
S100, 接收增强物理下行控制信道 ePDCCH信息， 其中所述 ePDCCH信 息的下行控制信令 DCI 包括指示物理下行共享信道 PDSCH所占资源大小信 息；  S100. Receive an enhanced physical downlink control channel ePDCCH information, where the downlink control signaling DCI of the ePDCCH information includes resource size information indicating a physical downlink shared channel PDSCH;
S102,根据预先设置的 ePDCCH位置规则获取 PDSCH的起始位置，结合 所述 PDSCH所占资源大小信息和所述 PDSCH的起始位置得到 PDSCH所占 资源信息；  S102. Acquire a start position of the PDSCH according to the preset ePDCCH location rule, and obtain resource information occupied by the PDSCH according to the resource size information occupied by the PDSCH and the start position of the PDSCH.
S104, 在所述 PDSCH所占资源处解调 PDSCH。  S104: Demodulate the PDSCH at the resource occupied by the PDSCH.
本发明实施方式中， ePDCCH和 PDSCH所占的时频资源相近， 因为它们 是发往同一 UE的， 适用于 PDSCH的各种高级发射技术同样适用于 ePDCCH 的发射， 因而发送设备认为对该 UE 信道适用的 PDSCH 资源， 也适用于 ePDCCH。 该 ePDCCH中只包含 PDSCH所占资源大小， 而不包含 PDSCH的 起始位置指示比特（ bits ), PDSCH的起始位置具体可根据预先设置的 PDSCH 位置和 ePDCCH位置对应规则获取。根据预先设置的 PDSCH位置和 ePDCCH 位置对应规则获取 PDSCH 的起始位置， 结合 ePDCCH 的 DCI ( Downlink Control Information, 下行控制信令） 中包含的 PDSCH所占资源大小信息可得 到 PDSCH所占资源信息， 包括 PDSCH起始位置信息和所占资源大小信息， 从而方便解调操作。以 LTE 20M带宽，对应 110PRB ( Physical Resource Block, 物理资源块）为例，在原来的 ePDCCH格内容中，需要用 Ceil[log2(110)]=7bits 表示该 UE的 PDSCH起始位置信息， 再用 Ceil[log2(110)]=7bits表示该 UE的 PDSCH所占 PRB的个数。 一共需要 7+7=14bits表示 PDSCH所占资源信息； 而釆用本发明实施例的方法， 仍以 LTE 20M带宽， 对应 110PRB为例， 该 UE 的 PDSCH起始位置可由 ePDCCH的位置得到， 不再需要在 ePDCCH的内容 中包含 PDSCH的起始位置信息， 只需用 Ceil[log2(110)]=7bits表示该 UE的 PDSCH所占 PRB的个数，从而可以省去 7bits。由于发送设备所发射的 ePDCCH 所含的比特数减少，在相同的功率和时频总资源下， 可以给每比特分配更多的 功率和时频资源， 从而提高用户设备接收到的 ePDCCH的可靠性。 In the embodiment of the present invention, the time-frequency resources occupied by the ePDCCH and the PDSCH are similar, because they are sent to the same UE, and various advanced transmission technologies applicable to the PDSCH are also applicable to the transmission of the ePDCCH, and thus the transmitting device considers the channel of the UE. Applicable PDSCH resources are also applicable to ePDCCH. The ePDCCH includes only the resource size occupied by the PDSCH, and does not include the start position indication bit (bit) of the PDSCH. The start position of the PDSCH may be specifically obtained according to a preset PDSCH position and an ePDCCH position correspondence rule. According to the preset PDSCH location and ePDCCH The location correspondence rule acquires the start position of the PDSCH, and combines the resource size information of the PDSCH included in the DCI (downlink control information) of the ePDCCH to obtain the resource information occupied by the PDSCH, including the PDSCH start location information and the occupied information. Resource size information to facilitate demodulation operations. Taking the LTE 20M bandwidth and the corresponding 110 PRB (Physical Resource Block) as an example, in the original ePDCCH content, it is necessary to use Ceil[log2(110)]=7bits to indicate the PDSCH starting position information of the UE, and then use Ceil[log2(110)]=7bits indicates the number of PRBs occupied by the PDSCH of the UE. A total of 7+7=14 bits is needed to indicate the resource information occupied by the PDSCH. However, the method of the embodiment of the present invention still uses the LTE 20M bandwidth, and the corresponding 110 PRB is taken as an example. The PDSCH starting position of the UE can be obtained from the location of the ePDCCH, no longer It is necessary to include the start position information of the PDSCH in the content of the ePDCCH, and it is only necessary to use Ceil[log2(110)]=7bits to indicate the number of PRBs occupied by the PDSCH of the UE, so that 7 bits can be omitted. Since the number of bits included in the ePDCCH transmitted by the transmitting device is reduced, more power and time-frequency resources can be allocated to each bit under the same power and time-frequency total resources, thereby improving the reliability of the ePDCCH received by the user equipment. .
本发明一些实施方式中，预先设置的 ePDCCH位置规则包括 PDSCH的起 始位置是 ePDCCH信息的结束位置之后的预定位置。 另外一些实施方式中， 预先设置的 ePDCCH位置规则包括 PDSCH的结束位置是 ePDCCH信息的起 始位置之前的预定位置。 PDSCH相对于 ePDCCH的预设位置如何规定可由本 领域技术人员根据实际设计需要设定，例如， PDSCH的结束位置可与 ePDCCH 信息的起始位置相邻，或者 PDSCH的起始位置与 ePDCCH信息的结束位置相 邻。 本发明实施方式中的 Primary PDCCH、 ePDCCH以及 PDSCH之间的关系 示意图可如图 2所示，可根据 Primary PDCCH中的相关参数信息获取 ePDCCH 的信息， 根据 ePDCCH的相关参数信息又可以获取 PDSCH的有关信息。  In some embodiments of the present invention, the preset ePDCCH location rule includes a predetermined location after the PDSCH starting position is the end position of the ePDCCH information. In some other embodiments, the preset ePDCCH location rule includes that the end position of the PDSCH is a predetermined position before the start position of the ePDCCH information. The preset position of the PDSCH relative to the ePDCCH may be set by a person skilled in the art according to actual design requirements. For example, the end position of the PDSCH may be adjacent to the start position of the ePDCCH information, or the start position of the PDSCH and the end of the ePDCCH information. The location is adjacent. A schematic diagram of the relationship between the Primary PDCCH, the ePDCCH, and the PDSCH in the embodiment of the present invention may be as shown in FIG. 2, and the information of the ePDCCH may be obtained according to the related parameter information in the Primary PDCCH, and the PDSCH may be acquired according to the related parameter information of the ePDCCH. information.
由于本发明实施方式中 ePDCCH和 PDSCH发往同一个 UE, ePDCCH 所釆用的发射模式与 PDSCH—致， 而原来适用 PDSCH的各种高级发射技术 也适用于 ePDCCH发射 , 因而适合该 UE的 PDSCH相应的 PMI、 RI、 MCS , 同样适用于发往该 UE的 ePDCCH。 本发明的实施方式中， 将 PMI、 RI、 MCS 信息放在 Primary PDCCH中， ePDCCH中将不含有 PMI、 RI、 MCS, 在用户 设备中将 PMI、 RI、 MCS既用于解调 ePDCCH, 又用于解调 PDSCH, 这样可 大大减少 ePDCCH盲检测的运算量。 以上结合附图和实施方式对本发明提供的用于增强物理下行控制信道的 通信方法实施例进行了说明，下面将结合附图和实施方式对本发明提供的用于 增强物理下行控制信道的用户设备实施例进行说明。 In the embodiment of the present invention, the ePDCCH and the PDSCH are sent to the same UE, and the transmission mode used by the ePDCCH is consistent with the PDSCH, and various advanced transmission technologies that are applicable to the PDSCH are also applicable to the ePDCCH transmission, so that the PDSCH corresponding to the UE is corresponding. The PMI, RI, and MCS are also applicable to the ePDCCH addressed to the UE. In the embodiment of the present invention, the PMI, RI, and MCS information are placed in the Primary PDCCH, and the ePDCCH does not include the PMI, the RI, and the MCS, and the PMI, the RI, and the MCS are used in the user equipment to demodulate the ePDCCH, and In demodulating the PDSCH, the computational complexity of ePDCCH blind detection can be greatly reduced. The embodiment of the communication method for enhancing the physical downlink control channel provided by the present invention is described above with reference to the accompanying drawings and embodiments. The following is a description of the user equipment for enhancing the physical downlink control channel provided by the present invention with reference to the accompanying drawings and embodiments. The example is explained.
参见图 3 , 图示了根据本发明实施方式的用于增强物理下行信道的用户设 备的结构示意图， 该用于增强物理下行控制信道的用户设备 300包括：  Referring to FIG. 3, a schematic structural diagram of a user equipment for enhancing a physical downlink channel according to an embodiment of the present invention is illustrated. The user equipment 300 for enhancing a physical downlink control channel includes:
接收单元 302,用于接收增强物理下行控制信道 ePDCCH信息， 其中所述 ePDCCH信息的下行控制信令 DCI包括指示物理下行共享信道 PDSCH所占资 源大小信息；  The receiving unit 302 is configured to receive the enhanced physical downlink control channel ePDCCH information, where the downlink control signaling DCI of the ePDCCH information includes information indicating resource size occupied by the physical downlink shared channel PDSCH;
确定单元 304 , 用于根据预先设置的 ePDCCH位置规则获取 PDSCH的起 始位置， 结合所述 PDSCH所占资源大小信息和所述 PDSCH的起始位置得到 PDSCH所占资源信息；  The determining unit 304 is configured to obtain a starting position of the PDSCH according to the pre-set ePDCCH location rule, and obtain resource information occupied by the PDSCH according to the resource size information occupied by the PDSCH and the starting position of the PDSCH;
解调单元 306, 用于在所述 PDSCH所占资源处解调 PDSCH。  The demodulation unit 306 is configured to demodulate the PDSCH at the resource occupied by the PDSCH.
本发明实施方式中， ePDCCH和 PDSCH所占的时频资源相近， 因为它们 是发往同一 UE的， 适用于 PDSCH的各种高级发射技术同样适用于 ePDCCH 的发射， 因而发送设备认为对该 UE 信道适用的 PDSCH 资源， 也适用于 ePDCCH。 该 ePDCCH中只包含 PDSCH所占资源大小， 而不包含 PDSCH的 起始位置指示 bits, PDSCH的起始位置具体可根据预先设置的 PDSCH位置和 ePDCCH位置对应规则获取。根据预先设置的 PDSCH位置和 ePDCCH位置对 应规则获取 PDSCH的起始位置，结合 ePDCCH的 DCI中包含的 PDSCH所占 资源大小信息可得到 PDSCH所占资源信息， 包括 PDSCH起始位置信息和所 占资源大小信息， 从而方便解调操作。 以 LTE 20M带宽， 对应 110PRB为例， 在原来的 ePDCCH格内容中，需要用 Ceil[log2(110)]=7bits表示该 UE的 PDSCH 起始位置信息， 再用 Ceil[log2(110)]=7bits表示该 UE的 PDSCH所占 PRB的 个数。 一共需要 7+7=14bits表示 PDSCH所占资源信息； 而釆用本发明实施例 的方法， 仍以 LTE 20M带宽， 对应 110PRB为例， 该 UE的 PDSCH起始位置 可由 ePDCCH的位置得到， 不再需要在 ePDCCH的内容中包含 PDSCH的起 始位置信息， 只需用 Ceil[log2(110)]=7bits表示该 UE的 PDSCH所占 PRB的 个数， 从而可以省去 7bits。 由于发送设备所发射的 ePDCCH所含的比特数减 少，在相同的功率和时频总资源下，可以给每比特分配更多的功率和时频资源， 从而提高用户设备接收到的 ePDCCH的可靠性。 In the embodiment of the present invention, the time-frequency resources occupied by the ePDCCH and the PDSCH are similar, because they are sent to the same UE, and various advanced transmission technologies applicable to the PDSCH are also applicable to the transmission of the ePDCCH, and thus the transmitting device considers the channel of the UE. Applicable PDSCH resources are also applicable to ePDCCH. The ePDCCH includes only the resource size occupied by the PDSCH, and does not include the start position indication bit of the PDSCH. The start position of the PDSCH may be specifically obtained according to a preset PDSCH position and an ePDCCH position correspondence rule. Obtaining the start position of the PDSCH according to the preset PDSCH location and the ePDCCH location corresponding rule, and combining the resource size information of the PDSCH included in the DCI of the ePDCCH, the PDSCH occupied resource information, including the PDSCH starting location information and the occupied resource size. Information to facilitate demodulation operations. Taking LTE 20M bandwidth and 110PRB as an example, in the original ePDCCH content, Ceil[log2(110)]=7bits is needed to indicate the PDSCH starting position information of the UE, and then Ceil[log2(110)]=7bits is used. Indicates the number of PRBs occupied by the PDSCH of the UE. A total of 7+7=14 bits is needed to indicate the resource information occupied by the PDSCH. However, the method of the embodiment of the present invention still uses the LTE 20M bandwidth, and the 110PRB is taken as an example. The PDSCH starting position of the UE can be obtained by the location of the ePDCCH, no longer It is necessary to include the start position information of the PDSCH in the content of the ePDCCH, and it is only necessary to use Ceil[log2(110)]=7bits to indicate the number of PRBs occupied by the PDSCH of the UE, so that 7 bits can be omitted. Since the number of bits included in the ePDCCH transmitted by the transmitting device is reduced, more power and time-frequency resources can be allocated to each bit under the same power and total time-frequency resources. Thereby improving the reliability of the ePDCCH received by the user equipment.
本发明一些实施方式中，预先设置的 ePDCCH位置规则包括 PDSCH的起 始位置是 ePDCCH信息的结束位置之后的预设位置。 另外一些实施方式中， 预先设置的 ePDCCH位置规则包括 PDSCH的结束位置是 ePDCCH信息的起 始位置之前的预设位置。本发明实施方式中的 Primary PDCCH, ePDCCH以及 PDSCH之间的关系示意图可如图 2所示， 可根据 Primary PDCCH中的相关参 数信息获取 ePDCCH的信息， 然后根据 ePDCCH的相关参数信息又可以获取 PDSCH的有关信息。  In some embodiments of the present invention, the preset ePDCCH location rule includes a preset location of the PDSCH starting position after the end position of the ePDCCH information. In some other embodiments, the preset ePDCCH location rule includes a preset position of the PDSCH ending position before the start position of the ePDCCH information. A schematic diagram of the relationship between the Primary PDCCH, the ePDCCH, and the PDSCH in the embodiment of the present invention may be as shown in FIG. 2, and the information of the ePDCCH may be obtained according to the related parameter information in the Primary PDCCH, and then the PDSCH may be acquired according to the related parameter information of the ePDCCH. Information about.
由于本发明实施方式中 ePDCCH和 PDSCH发往同一个 UE, ePDCCH 所釆用的发射模式与 PDSCH—致， 而原来适用 PDSCH的各种高级发射技术 也适用于 ePDCCH发射 , 因而适合该 UE的 PDSCH相应的 PMI、 RI、 MCS , 同样适用于发往该 UE的 ePDCCH。 本发明的实施方式中， 用户设备还可包括 参数获取单元 308,用于通过 Primary PDCCH获取用于解调 ePDCCH的参数， 其中用于解调 ePDCCH的参数包括预编码矩阵索引 PMI、秩索引 RI和调制与 编码制式 MCS中的至少一项。由于将 PMI、RI、MCS信息放在 Primary PDCCH 中， ePDCCH中将不含有 PMI、 RI、 MCS, 用户设备的解调单元将 PMI、 RI、 MCS既用于解调 ePDCCH, 又用于解调 PDSCH, 这样可大大减少 ePDCCH 盲检测的运算量。  In the embodiment of the present invention, the ePDCCH and the PDSCH are sent to the same UE, and the transmission mode used by the ePDCCH is consistent with the PDSCH, and various advanced transmission technologies that are applicable to the PDSCH are also applicable to the ePDCCH transmission, so that the PDSCH corresponding to the UE is corresponding. The PMI, RI, and MCS are also applicable to the ePDCCH addressed to the UE. In the embodiment of the present invention, the user equipment may further include a parameter obtaining unit 308, configured to acquire, by using a Primary PDCCH, a parameter for demodulating the ePDCCH, where the parameters used for demodulating the ePDCCH include a precoding matrix index PMI, a rank index RI, and At least one of the modulation and coding system MCS. Since the PMI, RI, and MCS information are placed in the Primary PDCCH, the ePDCCH will not contain PMI, RI, and MCS. The demodulation unit of the user equipment uses PMI, RI, and MCS to demodulate the ePDCCH and demodulate the PDSCH. This greatly reduces the amount of computation for ePDCCH blind detection.
综上所述， 本发明实施例提供的用于 ePDCCH的通信方法和用户设备利 用 ePDCCH和 PDSCH强相关特性， 通过预先设置的 PDSCH位置和 ePDCCH 位置对应关系获得 PDSCH起始位置从而无需在 ePDCCH中包含指示 UE的 PDSCH起始位置 bits, 同时把原来 ePDCCH中承载的 PMI、 RI、 MCS信息放 在 Primary PDCCH 中， 用户设备将所述 PMI、 RI、 MCS 信息既用于解调 ePDCCH, 又用于解调 PDSCH, 这样可大大减少 ePDCCH盲检测的运算量， 又可以减少***控制信令的开销， 从而提高***的数据吞吐量。  In summary, the communication method for the ePDCCH and the user equipment provided by the embodiment of the present invention use the strong correlation between the ePDCCH and the PDSCH, and obtain the PDSCH start position by using the preset correspondence between the PDSCH position and the ePDCCH position, so that the ePDCCH does not need to be included in the ePDCCH. Indicates the PDSCH start position bit of the UE, and puts the PMI, RI, and MCS information carried in the original ePDCCH into the Primary PDCCH, and the user equipment uses the PMI, RI, and MCS information to demodulate the ePDCCH and the solution. By adjusting the PDSCH, the computational complexity of ePDCCH blind detection can be greatly reduced, and the overhead of system control signaling can be reduced, thereby improving the data throughput of the system.
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程 , 是可以通过计算机程序来指令相关的硬件来完成，所述的程序可存储于一计算 机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。 其中，所述的存储介质可为磁碟、光盘、只读存储记忆体（Read-Only Memory, OM)或随机存储记忆体（Random Access Memory, RAM)等。 以上所揭露的仅为本发明一种较佳实施例而已，当然不能以此来限定本发 明之权利范围， 因此依本发明权利要求所作的等同变化， 仍属本发明所涵盖的 范围。 A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium, the program When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, or a read-only memory (Read-Only Memory, OM) or random access memory (RAM). The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, and thus equivalent changes made in the claims of the present invention are still within the scope of the present invention.

Claims

权 利 要 求 Rights request
1、 一种用于增强物理下行控制信道的通信方法， 其特征在于， 所述方法包 括： A communication method for enhancing a physical downlink control channel, the method comprising:
接收增强物理下行控制信道 ePDCCH信息， 其中所述 ePDCCH信息的下行 控制信令 DCI包括指示物理下行共享信道 PDSCH所占资源大小信息；  And receiving the enhanced physical downlink control channel ePDCCH information, where the downlink control signaling DCI of the ePDCCH information includes information indicating resource size occupied by the physical downlink shared channel PDSCH;
根据预先设置的 ePDCCH位置规则获取 PDSCH 的起始位置， 结合所述 PDSCH所占资源大小信息和所述 PDSCH的起始位置得到 PDSCH所占资源信 息；  Acquiring a starting position of the PDSCH according to the preset ePDCCH location rule, and obtaining resource information occupied by the PDSCH according to the resource size information occupied by the PDSCH and the starting position of the PDSCH;
在所述 PDSCH所占资源处解调 PDSCH。  The PDSCH is demodulated at the resource occupied by the PDSCH.
2、 如权利要求 1所述的方法， 其特征在于， 所述预先设置的 ePDCCH位置 规则包括 PDSCH的起始位置是所述 ePDCCH信息的结束位置之后的预设位置。 The method according to claim 1, wherein the preset ePDCCH location rule includes a preset location after the PDSCH starting location is an end position of the ePDCCH information.
3、 如权利要求 1所述的方法， 其特征在于， 所述预先设置的 ePDCCH位置 规则包括 PDSCH的结束位置是所述 ePDCCH信息的起始位置之前的预设位置。 The method according to claim 1, wherein the preset ePDCCH location rule includes a preset position of the PDSCH ending position before the start position of the ePDCCH information.
4、 如权利要求 1 至 3 中任意一项所述的方法， 其特征在于， 所述在所述 PDSCH所占资源处解调 PDSCH包括： The method according to any one of claims 1 to 3, wherein the demodulating the PDSCH at the resource occupied by the PDSCH comprises:
釆用用于解调 ePDCCH的参数， 在所述 PDSCH所占资源处解调 PDSCH, 所述用于解调 ePDCCH的参数包括： 预编码矩阵索引 PMI、秩索引 RI和调制与 编码制式 MCS中的至少一项。  Demodulating the PDSCH at the resource occupied by the PDSCH by using a parameter for demodulating the ePDCCH, where the parameters for demodulating the ePDCCH include: a precoding matrix index PMI, a rank index RI, and a modulation and coding system MCS At least one.
5、 如权利要求 4所述的方法， 其特征在于， 还包括： 通过主 PDCCH获取 所述用于解调 ePDCCH的参数。 The method according to claim 4, further comprising: acquiring, by using a primary PDCCH, the parameter used for demodulating the ePDCCH.
6、 一种用于增强物理下行控制信道的用户设备， 其特征在于， 所述用户设 备包括： 6. A user equipment for enhancing a physical downlink control channel, where the user equipment includes:
接收单元， 用于接收增强物理下行控制信道 ePDCCH 信息， 其中所述 ePDCCH信息的下行控制信令 DCI包括指示物理下行共享信道 PDSCH所占资 源大小信息； a receiving unit, configured to receive an enhanced physical downlink control channel ePDCCH information, where The downlink control signaling DCI of the ePDCCH information includes information indicating resource size occupied by the physical downlink shared channel PDSCH;
确定单元， 用于根据预先设置的 ePDCCH位置规则获取 PDSCH的起始位 置，结合所述 PDSCH所占资源大小信息和所述 PDSCH的起始位置得到 PDSCH 所占资源信息；  a determining unit, configured to acquire a starting position of the PDSCH according to the preset ePDCCH location rule, and obtain resource information occupied by the PDSCH according to the resource size information occupied by the PDSCH and the starting position of the PDSCH;
解调单元， 用于在所述 PDSCH所占资源处解调 PDSCH。  And a demodulation unit, configured to demodulate the PDSCH at a resource occupied by the PDSCH.
7、 如权利要求 6所述的用户设备， 其特征在于， 所述预先设置的 ePDCCH 位置规则包括 PDSCH的起始位置是所述 ePDCCH信息的结束位置之后的预设 位置。 The user equipment according to claim 6, wherein the preset ePDCCH location rule includes a preset location after the PDSCH starting position is an end position of the ePDCCH information.
8、 如权利要求 6所述的用户设备， 其特征在于， 所述预先设置的 ePDCCH 位置规则包括 PDSCH的结束位置是所述 ePDCCH信息的起始位置之前的预设 位置。 The user equipment according to claim 6, wherein the preset ePDCCH location rule includes a preset location where the end position of the PDSCH is before the start position of the ePDCCH information.
9、 如权利要求 6至 8中任意一项所述的用户设备， 其特征在于， 所述解调 单元， 用于釆用用于解调 ePDCCH 的参数， 在所述 PDSCH 所占资源处解调 PDSCH, 所述用于解调 ePDCCH 的参数包括： 预编码矩阵索引 PMI、 秩索引 RI和调制与编码制式 MCS中的至少一项。 The user equipment according to any one of claims 6 to 8, wherein the demodulation unit is configured to demodulate an ePDCCH and demodulate the resource occupied by the PDSCH. The PDSCH, the parameter for demodulating the ePDCCH includes: at least one of a precoding matrix index PMI, a rank index RI, and a modulation and coding system MCS.
10、 如权利要求 9 所述的用户设备， 其特征在于， 所述用户设备还包括： 参数获取单元， 用于通过主 PDCCH获取所述用于解调 ePDCCH的参数。 The user equipment according to claim 9, wherein the user equipment further includes: a parameter obtaining unit, configured to acquire, by using a primary PDCCH, the parameter used for demodulating the ePDCCH.
PCT/CN2012/082753 2011-10-11 2012-10-11 Communications method and user equipment for enhanced physical downlink control channel WO2013053322A1 (en)

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