CN110233710B - Method and device for transmitting and receiving downlink control channel in wireless communication system - Google Patents

Abstract

Translated fromChinese

提供一种在无线通信系统中用于分配和信号发送ACK/NACK资源的方法和装置，其中节点B确定使用预定的固定大小的第一资源组内的ACK/NACK资源用于非持续调度的数据信道的ACK/NACK传输，ACK/NACK资源被隐式映射到携带关于非持续调度的数据信道的调度信息的调度控制信道SCCH；以及分配预定的可变大小的第二资源组内的ACK/NACK资源用于持续调度的数据信道的ACK/NACK传输，并向至少一个UE发送显式指示分配的ACK/NACK资源的资源指示信息。

A method and apparatus for allocating and signaling ACK/NACK resources in a wireless communication system is provided, wherein a Node B determines to use ACK/NACK resources within a predetermined fixed size first resource group for non-persistently scheduled data ACK/NACK transmission of the channel, the ACK/NACK resources are implicitly mapped to the scheduling control channel SCCH carrying scheduling information about the non-persistently scheduled data channel; and the ACK/NACK within the second resource group is allocated a predetermined variable size The resources are used for ACK/NACK transmission of persistently scheduled data channels, and resource indication information that explicitly indicates the allocated ACK/NACK resources is sent to at least one UE.

Description

Translated fromChinese

无线通信系统中下行链路控制信道的收发方法和装置Method and device for transmitting and receiving downlink control channel in wireless communication system

本案是申请日为2008年1月10日、申请号为201310316472.3、发明名称为“无线通信系统中分配和发送确认/不确认资源的方法和装置”的发明专利申请的分案申请。This case is a divisional application of an invention patent application with an application date of January 10, 2008, an application number of 201310316472.3, and an invention title of "Method and Device for Allocating and Sending Acknowledged/Unacknowledged Resources in a Wireless Communication System".

技术领域technical field

本发明一般涉及无线通信系统。更具体地，本发明涉及用于发送和接收对于混合自动重发请求(HARQ)的确认/不确认(ACK/NACK)的方法和装置。The present invention generally relates to wireless communication systems. More particularly, the present invention relates to a method and apparatus for sending and receiving acknowledgement/non-acknowledgement (ACK/NACK) for hybrid automatic repeat request (HARQ).

背景技术Background technique

在数据传输系统中存在两种主要的错误控制方案，前向纠错(FEC)和自动重发请求(ARQ)。FEC系统试图纠正接收数据中的错误。如果纠错成功，则解码正确的数据。如果纠错失败，则错误的数据提供给用户或该数据丢失。在ARQ系统中，发射机发送使用具有良好的纠错能力的FEC编码的数据，并且如果从接收的数据中检测到错误，则接收机向发射机请求重新发送。There are two main error control schemes in data transmission systems, Forward Error Correction (FEC) and Automatic Repeat Request (ARQ). The FEC system attempts to correct errors in the received data. If error correction is successful, the correct data is decoded. If error correction fails, erroneous data is provided to the user or the data is lost. In an ARQ system, the transmitter transmits data encoded using FEC with good error correction capability, and if an error is detected from the received data, the receiver requests retransmission from the transmitter.

FEC在良好的信道环境中是相对低效率的，且如果纠错失败，则降低系统可靠性。另一方面，ARQ具有高的系统可靠性和低的冗余的有效传输的优点，但是其在不佳信道环境中导致频繁的重新发送请求，由此显著降低系统效率。为了克服这些缺点，提出了HARQ，其按照合适的方式组合FEC和ARQ。FEC is relatively inefficient in good channel environments and reduces system reliability if error correction fails. On the other hand, ARQ has the advantages of efficient transmission with high system reliability and low redundancy, but it leads to frequent retransmission requests in poor channel environments, thereby significantly reducing system efficiency. To overcome these drawbacks, HARQ is proposed, which combines FEC and ARQ in a suitable manner.

HARQ是试图纠正接收的编码数据(HARQ分组)中的错误的方案。其从诸如循环冗余校验码(CRC)的简单检错码中确定是否请求HARQ分组的重新发送。在接收的HARQ分组中确定存在或不存在错误之后，接收机向发射机反馈回ACK或NACK。发射机根据ACK或NACK来重传HARQ分组或发送新的HARQ分组。HARQ is a scheme that attempts to correct errors in received encoded data (HARQ packets). It determines whether to request retransmission of the HARQ packet from a simple error detection code such as a Cyclic Redundancy Check (CRC). After determining the presence or absence of errors in the received HARQ packets, the receiver feeds back an ACK or NACK to the transmitter. The transmitter retransmits the HARQ packet or sends a new HARQ packet according to the ACK or NACK.

接收机使用适当的无线资源用于ACK/NACK传输。ACK/NACK在正交频分复用(OFDM)无线通信系统中在较少的副载波上发送，且在宽带码分多址(WCDMA)系统中在预定的代码信道上发送。一般，HARQ分组在一个传输时间间隔(TTI)被同时发送至多个用户。因此，ACK/NACK也被同时发送用于HARQ分组。The receiver uses appropriate radio resources for ACK/NACK transmission. ACK/NACK is transmitted on fewer subcarriers in an Orthogonal Frequency Division Multiplexing (OFDM) wireless communication system, and is transmitted on a predetermined code channel in a Wideband Code Division Multiple Access (WCDMA) system. Typically, HARQ packets are sent to multiple users simultaneously in one transmission time interval (TTI). Therefore, ACK/NACK is also sent simultaneously for HARQ packets.

当节点B向用户设备(UE)分配下行链路数据信道时，其也分配控制信道资源，在其中UE将发送关于下行链路数据信道的ACK/NACK。对于上行链路数据传输，节点B在上行链路数据信道上从UE接收上行链路分组数据，然后在节点B和UE之间协商的资源中发送对于该分组数据的ACK/NACK。When a Node B allocates a downlink data channel to a user equipment (UE), it also allocates control channel resources in which the UE will send ACK/NACK for the downlink data channel. For uplink data transmission, the Node B receives uplink packet data from the UE on the uplink data channel, and then sends an ACK/NACK for the packet data in the resources negotiated between the Node B and the UE.

一般，有限的资源可用于系统且系统资源应当被合适地划分给包括数据信道和ACK/NACK信道(ACKCH)的信道。因此，重要的是给ACKCH分配与给定TTI所需的资源一样多的资源。为了说明资源分配，在图1中举例示出增强的通用地面无线接入(EUTRA)-OFDM下行链路帧结构。UTRA是第三代合作伙伴计划(3GPP)的未来一代移动通信标准。In general, limited resources are available for the system and the system resources should be appropriately allocated to channels including a data channel and an ACK/NACK channel (ACKCH). Therefore, it is important to allocate as many resources to the ACKCH as are required for a given TTI. To illustrate resource allocation, an Enhanced Universal Terrestrial Radio Access (EUTRA)-OFDM downlink frame structure is exemplified in FIG. 1 . UTRA is a future generation mobile communication standard of the 3rd Generation Partnership Project (3GPP).

参考图1，系统带宽101是10MHz且在系统带宽101中定义总共50个资源块(RB)102。每个RB 102包括12个副载波，且每个1ms的TTI 105具有14个OFDM码元间隔104。一个下行数据信道可以被形成有一个或多个RB。Referring to FIG. 1 , thesystem bandwidth 101 is 10 MHz and a total of 50 resource blocks (RBs) 102 are defined in thesystem bandwidth 101 . Each RB 102 includes 12 subcarriers, and each 1 ms TTI 105 has 14OFDM symbol intervals 104 . One downlink data channel may be formed with one or more RBs.

在图1的下行链路帧结构中，对于一个TTI 105能够同时调度多达50个下行链路数据信道。因此，需要多达50个上行链路ACKCH。在实际实施例中，对于一个TTI平均调度10或20个数据信道，且需要用于该数据信道的一样多的上行链路ACKCH。由于可用ACKCH的数量和实际使用的ACKCH的平均数量十分不同，因此有效资源分配是很重要的。In the downlink frame structure of Figure 1, up to 50 downlink data channels can be scheduled simultaneously for oneTTI 105. Therefore, up to 50 uplink ACKCHs are required. In a practical embodiment, 10 or 20 data channels are scheduled on average for one TTI, and as many uplink ACKCHs are needed for that data channel. Since the number of available ACKCHs is quite different from the average number of ACKCHs actually used, efficient resource allocation is important.

如果节点B明确通知UE为数据信道在每个TTI中建立的ACKCH，则仅与所需的一样多的ACKCH会在该TTI中被分配。因此，对于下行链路数据传输，UE在通知的ACK/NACK资源中发送ACK/NACK。对于上行链路数据传输，UE从由节点B信号发送的ACK/NACK资源中检测节点B发送的ACK/NACK。因此，减少用于信令的资源的数量(即信令开销)是很有意义的。对于每个TTI，从节点B到UE的关于ACK/NACK资源的信息的显式信令造成极大的信令开销。If the Node B explicitly informs the UE of the ACKCH established in each TTI for the data channel, only as many ACKCHs as needed will be allocated in that TTI. Therefore, for downlink data transmission, the UE sends ACK/NACK in the notified ACK/NACK resource. For uplink data transmission, the UE detects the ACK/NACK sent by the Node B from the ACK/NACK resources signaled by the Node B. Therefore, it makes sense to reduce the amount of resources used for signaling (ie, signaling overhead). Explicit signaling of information about ACK/NACK resources from the Node B to the UE for each TTI results in significant signaling overhead.

因此，存在对于优化分配给ACKCH的资源的数量和信号发送ACK/NACK资源的开销的需要，以便通过有效使用无线资源来增加系统容量。Therefore, there is a need for optimizing the number of resources allocated to ACKCH and the overhead of signaling ACK/NACK resources in order to increase system capacity by efficiently using radio resources.

发明内容SUMMARY OF THE INVENTION

本发明示范实施例的一方面是至少解决这些问题和/缺点并且至少提供下述优点。因此，本发明的示范实施例的一方面是提供在无线通信系统中用于优化ACK/NACK资源的数量的资源分配方法和装置。An aspect of exemplary embodiments of the present invention is to address at least these problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of exemplary embodiments of the present invention is to provide a resource allocation method and apparatus for optimizing the number of ACK/NACK resources in a wireless communication system.

本发明示范实施例的另一方面是提供在无线通信系统中用于优化信号发送关于ACK/NACK资源的信息的开销的方法和装置。Another aspect of exemplary embodiments of the present invention is to provide a method and apparatus for optimizing the overhead of signaling information on ACK/NACK resources in a wireless communication system.

本发明示范实施例的再一方面是提供在无线通信系统中用于根据数据信道资源是否被持续调度或非持续调度而根据不同的方式信号发送关于ACK/NACK资源的信息的方法和装置。Still another aspect of exemplary embodiments of the present invention is to provide a method and apparatus for signaling information on ACK/NACK resources in different manners according to whether data channel resources are persistently scheduled or non-persistently scheduled in a wireless communication system.

依据本发明示范实施例的一方面，提供一种在无线通信系统中用于分配和信号发送ACK/NACK资源的方法，其中确定使用预定的固定大小的第一资源组内的ACK/NACK资源用于非持续调度的数据信道的ACK/NACK传输，ACK/NACK资源被隐式映射到携带关于非持续调度的数据信道的调度信息的调度控制信道SCCH；以及在预定的可变大小的第二资源组内的ACK/NACK资源被分配用于持续调度的数据信道的ACK/NACK传输，并且显式指示分配的ACK/NACK资源的资源指示信息被发送到至少一个UE。According to an aspect of an exemplary embodiment of the present invention, there is provided a method for allocating and signaling ACK/NACK resources in a wireless communication system, wherein ACK/NACK resources within a first resource group of a predetermined fixed size are determined to be used for use. For ACK/NACK transmission of non-persistently scheduled data channels, the ACK/NACK resources are implicitly mapped to the scheduling control channel SCCH carrying scheduling information about the non-persistently scheduled data channels; and a second resource of a predetermined variable size ACK/NACK resources within a group are allocated for ACK/NACK transmission of persistently scheduled data channels, and resource indication information explicitly indicating the allocated ACK/NACK resources is sent to at least one UE.

依据本发明示范实施例的另一方面，提供一种在无线通信系统中用于分配和信号发送ACK/NACK资源的节点B的装置，其中控制器确定使用预定的固定大小的第一资源组内的ACK/NACK资源用于非持续调度的数据信道的ACK/NACK传输，ACK/NACK资源被隐式映射到携带关于非持续调度的数据信道的调度信息的SCCH；以及确定分配预定的可变大小的第二资源组内的ACK/NACK资源用于持续调度的数据信道的ACK/NACK传输；以及产生器产生和向至少一个UE发送显式指示分配的ACK/NACK资源的资源指示信息。According to another aspect of an exemplary embodiment of the present invention, there is provided an apparatus for a Node B for allocating and signaling ACK/NACK resources in a wireless communication system, wherein a controller determines to use a predetermined fixed size within a first resource group. The ACK/NACK resource is used for ACK/NACK transmission of the non-persistently scheduled data channel, and the ACK/NACK resource is implicitly mapped to the SCCH carrying scheduling information about the non-persistently scheduled data channel; and it is determined to allocate a predetermined variable size The ACK/NACK resources in the second resource group of the are used for ACK/NACK transmission of persistently scheduled data channels; and the generator generates and transmits resource indication information that explicitly indicates the allocated ACK/NACK resources to at least one UE.

依据本发明示范实施例的另一方面，提供一种在无线通信系统中用于接收ACK/NACK资源的方法，其中如果非持续调度的数据信道被分配给UE，则确定使用预定的固定大小的第一资源组内的ACK/NACK资源用于非持续调度的数据信道的ACK/NACK传输，该ACK/NACK资源被隐式映射到携带关于非持续调度的数据信道的调度信息的SCCH；以及如果持续调度的数据信道被分配给UE，则接收显式指示分配的用于与预定的可变大小的第二资源组内的持续调度的数据信道对应的ACKCH的ACK/NACK资源的资源指示信息。According to another aspect of exemplary embodiments of the present invention, there is provided a method for receiving ACK/NACK resources in a wireless communication system, wherein if a non-persistently scheduled data channel is allocated to a UE, it is determined to use a predetermined fixed size The ACK/NACK resources within the first resource group are used for ACK/NACK transmission of the non-persistently scheduled data channel, the ACK/NACK resources are implicitly mapped to the SCCH carrying scheduling information about the non-persistently scheduled data channel; and if When the persistently scheduled data channel is allocated to the UE, the UE receives resource indication information that explicitly indicates the allocated ACK/NACK resources for the ACKCH corresponding to the persistently scheduled data channel in the second predetermined variable-sized resource group.

依据本发明示范实施例的另一方面，提供一种在无线通信系统中用于接收ACK/NACK资源的UE的装置，其中控制器用于：如果非持续调度的数据信道被分配给UE，则确定使用预定的固定大小的第一资源组内的ACK/NACK资源用于非持续调度的数据信道的ACK/NACK传输，ACK/NACK资源被隐式映射到携带关于非持续调度的数据信道的调度信息的SCCH；以及如果持续调度的数据信道被分配给UE，则确定接收显式指示分配的用于与预定的可变大小的第二资源组内的持续调度的数据信道对应的ACKCH的ACK/NACK资源的资源指示信息；以及接收机在控制器的控制下接收资源指示信息。According to another aspect of an exemplary embodiment of the present invention, there is provided an apparatus for a UE receiving ACK/NACK resources in a wireless communication system, wherein a controller is configured to: determine if a non-persistently scheduled data channel is allocated to the UE The ACK/NACK resources within the first resource group of predetermined fixed size are used for ACK/NACK transmission of the non-persistently scheduled data channel, and the ACK/NACK resources are implicitly mapped to carry scheduling information about the non-persistently scheduled data channel and if a persistently scheduled data channel is allocated to the UE, determining to receive an ACK/NACK that explicitly indicates the allocated ACKCH corresponding to the persistently scheduled data channel within the predetermined variable-sized second resource group resource indication information of the resource; and the receiver receives the resource indication information under the control of the controller.

附图说明Description of drawings

通过以下参考附图的详细描述，本发明的一些示范实施例的上述和其它目的、特征和优点将更加明了，其中：The above and other objects, features and advantages of some exemplary embodiments of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings, wherein:

图1说明示范的下行链路资源结构。1 illustrates an exemplary downlink resource structure.

图2说明根据本发明的ACK/NACK资源分配方案。Figure 2 illustrates an ACK/NACK resource allocation scheme according to the present invention.

图3说明根据本发明的调度物理信道格式。Figure 3 illustrates a scheduled physical channel format according to the present invention.

图4说明根据本发明的另一ACK/NACK资源分配方案。4 illustrates another ACK/NACK resource allocation scheme according to the present invention.

图5说明根据本发明的示范ACK/NACK资源分配。5 illustrates exemplary ACK/NACK resource allocation in accordance with the present invention.

图6是根据本发明的节点B的操作的流程图。Figure 6 is a flow diagram of the operation of a Node B according to the present invention.

图7A是根据本发明的UE的操作的流程图。Figure 7A is a flow diagram of the operation of the UE according to the present invention.

图7B是根据本发明的在持续调度的情况下在HARQ传输期间UE的操作的流程图。7B is a flow diagram of the operation of the UE during HARQ transmission with persistent scheduling in accordance with the present invention.

图8是根据本发明的节点B装置的框图。Figure 8 is a block diagram of a Node B apparatus according to the present invention.

图9是根据本发明的UE装置的框图。9 is a block diagram of a UE device according to the present invention.

图10说明根据本发明的另一实施例的在多入多出(MIMO)系统中的ACK/NACK资源分配方案。10 illustrates an ACK/NACK resource allocation scheme in a multiple-input multiple-output (MIMO) system according to another embodiment of the present invention.

图11说明根据本发明的第三实施例的考虑小区覆盖的ACK/NACK资源分配方案。11 illustrates an ACK/NACK resource allocation scheme considering cell coverage according to a third embodiment of the present invention.

图12说明根据本发明的第四实施例的ACK/NACK资源分配方案。FIG. 12 illustrates an ACK/NACK resource allocation scheme according to a fourth embodiment of the present invention.

贯穿附图，相同附图参考数字将被理解为指代相同部件、特征和结构。Throughout the drawings, the same drawing reference numerals will be understood to refer to the same components, features and structures.

具体实施方式Detailed ways

在说明书中定义的主题，诸如详细的结构和元件被提供以助于本发明的示范实施例的充分理解。因此，本领域技术人员将认识到：在不背离本发明的精神和范围的情况下，可以对这里描述的实施例进行各种改变和修改。同样，为了清楚和简洁，将省略公知的功能和结构的说明。The subject matter defined in the specification, such as detailed structures and elements, is provided to facilitate a thorough understanding of the exemplary embodiments of the present invention. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the spirit and scope of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

虽然本发明的示范实施例将在OFDM蜂窝无线通信系统的环境中描述，具体为基于3GPP通用移动通信服务(UMTS)的EUTRA系统，但是本领域的技术人员将清楚地理解，本发明的主题也适用于具有相似技术背景和信道结构的其他通信系统，其中在本发明的范围和精神之内做出少量修改。Although exemplary embodiments of the present invention will be described in the context of an OFDM cellular wireless communication system, in particular a 3GPP Universal Mobile Telecommunications Service (UMTS) based EUTRA system, it will be clearly understood by those skilled in the art that the subject matter of the present invention also Applicable to other communication systems of similar technical background and channel structure, with minor modifications within the scope and spirit of the present invention.

本发明适合于无线通信系统的信道资源的有效分配和信令。依据本发明，根据数据信道的调度类型，不同的信令方案被用于ACK/NACK资源分配。根据数据业务的特征，数据信道能够以两种方式被调度。The present invention is suitable for efficient allocation and signaling of channel resources in wireless communication systems. According to the present invention, different signaling schemes are used for ACK/NACK resource allocation according to the scheduling type of the data channel. Depending on the characteristics of the data traffic, data channels can be scheduled in two ways.

对于不规则数据传输，如因特网浏览或使用游戏服务时，节点B在每次产生数据时选择合适的无线资源和合适的TTI用于该数据传输。当发送数据时，节点B在调度控制信道(SCCH)上向UE信号发送指示该选择结果的调度信息。此调度类型被称为非持续调度。For irregular data transmission, such as Internet browsing or using game services, the Node B selects appropriate radio resources and appropriate TTI for the data transmission each time data is generated. When sending data, the Node B signals the UE on a Scheduling Control Channel (SCCH) scheduling information indicating the result of the selection. This type of scheduling is called discontinuous scheduling.

对于大多数实时或规则的数据业务，如因特网协议承载的语音(VoIP)，节点B不需要在每个TTI中选择用于数据传输的资源和通知UE该选择的资源。因此，关于该数据业务的资源分配的调度信息在初始调度时发信令一次，并在随后的数据传输中有效。该调度信息的有效性持续维持或维持一预定时长。调度信息对多个TTI或对多个数据分组有效的这种调度类型被称为持续调度(persistent scheduling)。For most real-time or regular data traffic, such as Voice over Internet Protocol (VoIP), the Node B does not need to select resources for data transmission and inform the UE of the selected resources in each TTI. Therefore, the scheduling information about the resource allocation of the data service is signaled once at the initial scheduling and is valid in subsequent data transmissions. The validity of the scheduling information is maintained or maintained for a predetermined period of time. This type of scheduling in which scheduling information is valid for multiple TTIs or for multiple data packets is called persistent scheduling.

根据数据传输的持续或非持续调度，在本发明中ACK/NACK资源按不同方式被分配和信号发送。更具体地，对于非持续调度的数据传输，ACK/NACK资源由SCCH的索引指示。对于持续调度的数据传输，ACK/NACK资源在初始调度期间被明确通知且之后仍然有效。由于ACK/NACK资源分配取决于数据调度类型，因此整个资源的使用效率增加以及ACK/NACK资源的信令开销降低。According to persistent or non-persistent scheduling of data transmission, ACK/NACK resources are allocated and signaled in different ways in the present invention. More specifically, for non-persistently scheduled data transmission, the ACK/NACK resource is indicated by the index of the SCCH. For persistently scheduled data transmission, ACK/NACK resources are explicitly notified during initial scheduling and remain valid thereafter. Since the ACK/NACK resource allocation depends on the data scheduling type, the usage efficiency of the whole resource increases and the signaling overhead of the ACK/NACK resource decreases.

在其中多个码字能够通过多个发送/接收天线在单个数据信道上被同时发送的MIMO方案中，需要两个或多个ACKCH用于该码字。在这种环境中，本发明提供一种分配ACK/NACK资源并信号发送所分配的ACK/NACK资源的方法，该方法适合于MIMO传输。In a MIMO scheme in which multiple codewords can be simultaneously transmitted on a single data channel through multiple transmit/receive antennas, two or more ACKCHs are required for the codeword. In this environment, the present invention provides a method of allocating ACK/NACK resources and signaling the allocated ACK/NACK resources, which method is suitable for MIMO transmission.

这里使用的术语“ACK/NACK资源”被定义为分配给ACKCH的资源。The term "ACK/NACK resource" as used herein is defined as the resource allocated to the ACKCH.

实施例1Example 1

图2说明根据本发明的ACK/NACK资源分配方案。Figure 2 illustrates an ACK/NACK resource allocation scheme according to the present invention.

参考图2，节点B调度器200选择用于数据信道的非持续调度211或持续调度212。Referring to Figure 2, the Node B scheduler 200 selects eithernon-persistent scheduling 211 orpersistent scheduling 212 for the data channel.

在非持续调度211中，M个SCCH 203传递关于M个数据信道的调度信息。每个SCCH是携带关于一个数据信道的调度信息的物理层控制信道。为数据信道发送ACK/NACK的ACK/NACK资源由映射到数据信道的SCCH 203的索引隐式指示。因此，不同数据信道，即不同SCCH203被一对一映射到固定大小的资源组209内的ACKCH 207，如参考数字205所示。Innon-persistent scheduling 211,M SCCHs 203 convey scheduling information on M data channels. Each SCCH is a physical layer control channel that carries scheduling information about one data channel. The ACK/NACK resource for sending ACK/NACK for the data channel is implicitly indicated by the index ofSCCH 203 mapped to the data channel. Thus, different data channels, iedifferent SCCHs 203, are mapped one-to-one to ACKCHs 207 within a fixed size resource group 209, as indicated byreference numeral 205.

最简单的映射规则是SCCH#n映射到ACKCH#n，当然其他映射规则也是可用的。在SCCH 203和ACKCH 207之间的映射消除节点B向UE显式信号发送ACKCH 207的索引的需要，由此减少信令开销。The simplest mapping rule is that SCCH#n maps to ACKCH#n, of course other mapping rules are also available. The mapping betweenSCCH 203 and ACKCH 207 eliminates the need for the Node B to explicitly signal the index of ACKCH 207 to the UE, thereby reducing signaling overhead.

同时，为了定义各种格式和大小的SCCH，每个具有预定数量的副载波的控制信道元素(CCE)被定义和标记有CCE索引。SCCH能够被形成具有一个或多个CCE。然后，形成SCCH的CCE的索引被映射到ACK/NACK资源，而非SCCH的索引。因此UE能够从形成SCCH的CCE的索引中找到分配的ACKCH的索引，而不用单独信号发送ACKCH的索引。以这种方式，用于非持续调度的数据的ACK/NACK资源通过CCE的索引而非SCCH 203的索引被隐式信号发送。如果SCCH包括多个CCE，则CCE索引之一，例如最小的CCE索引能够被映射到ACK/NACK资源。Meanwhile, in order to define SCCHs of various formats and sizes, control channel elements (CCEs) each having a predetermined number of subcarriers are defined and marked with a CCE index. The SCCH can be formed with one or more CCEs. Then, the indices of the CCEs forming the SCCH are mapped to ACK/NACK resources instead of the indices of the SCCH. Therefore, the UE can find the index of the allocated ACKCH from the indices of the CCEs forming the SCCH without separately signaling the index of the ACKCH. In this way, ACK/NACK resources for non-persistently scheduled data are implicitly signaled by the index of the CCE rather than the index of theSCCH 203 . If the SCCH includes multiple CCEs, one of the CCE indices, eg, the smallest CCE index, can be mapped to the ACK/NACK resource.

图2所示的情况基于假设多达M个数据信道能够于一个TTI中被调度。对于每个TTI调度的数据信道的数量可以根据节点B的调度器200的决定改变，其反过来可以改变SCCH203和ACKCH 207的数量。对于非持续调度211，资源组209被预设为与数据信道的最大允许数量一样多或更多的ACKCH，以便由此允许ACK/NACK资源的快速分配而没有显式信令。The situation shown in Figure 2 is based on the assumption that up to M data channels can be scheduled in one TTI. The number of data channels scheduled for each TTI may change according to the decision of the Node B's scheduler 200, which in turn may change the number ofSCCH 203 and ACKCH 207. Fornon-persistent scheduling 211, the resource group 209 is preset with as many or more ACKCHs as the maximum allowed number of data channels, to thereby allow fast allocation of ACK/NACK resources without explicit signaling.

在持续调度212中，一旦在初始数据传输中使用SCCH 204为数据信道调度资源，则关于该资源的调度信息持续有效或在预定数量的后续TTI中有效，而无需新调度信息的传输。Inpersistent scheduling 212, onceSCCH 204 is used to schedule a resource for a data channel in an initial data transmission, the scheduling information for that resource persists or is valid for a predetermined number of subsequent TTIs without the need for transmission of new scheduling information.

然而78，考虑到在每个小区中持续调度的UE的数量不同且在每个TTI中持续调度的数据信道的数量也是不同的，在持续调度212中节点B明确地向UE发送指示在可变大小的资源组210内的ACKCH 208的资源指示信息，如参考数字206所示。只要对数据维持相同的资源分配，则资源指示信息之后对UE仍然有效。However, 78, considering that the number of persistently scheduled UEs in each cell is different and the number of persistently scheduled data channels in each TTI is also different, inpersistent scheduling 212 the Node B explicitly sends an indication to the UE that the variable Resource indication information for theACKCH 208 within the sized resource group 210 is shown asreference numeral 206 . As long as the same resource allocation is maintained for the data, the resource indication information is still valid for the UE thereafter.

当需要时，例如，为了收集分散于RB间的ACK/NACK资源，有可能在服务中通过额外的信令为持续调度的数据信道重新分配ACK/NACK资源。能够通过在持续调度的数据信道上发送的高层信令信息来指示ACK/NACK资源的重新分配。UE从高层信令信息中获得ACK/NACK资源指示信息，并在由ACK/NACK资源指示信息指示的资源中发送对于稍后接收的数据信道的ACK/NACK。When needed, eg, in order to collect ACK/NACK resources scattered among RBs, it is possible to reallocate ACK/NACK resources for persistently scheduled data channels through additional signaling in the service. The reallocation of ACK/NACK resources can be indicated by higher layer signaling information sent on the persistently scheduled data channel. The UE obtains the ACK/NACK resource indication information from the higher layer signaling information, and transmits ACK/NACK for the data channel received later in the resource indicated by the ACK/NACK resource indication information.

如图2所示，关于持续调度的数据信道的ACK/NACK资源指示信息在控制信道上通过层1(L1)/层2(L2)或通过高层协议信息被信号发送，如参考标记204所示。即使当关于该数据信道的持续调度信息由L1/L2信令发送时，ACK/NACK资源指示信息能够通过高层信令被发送。由于初始调度信息的传输在持续调度212中足够，因此ACK/NACK指示信息的显式信令不会造成信令开销的极大增加，尽管为每个TTI分配与所需一样多的ACK/NACK资源。As shown in FIG. 2, ACK/NACK resource indication information for persistently scheduled data channels is signaled on the control channel through layer 1 (L1)/layer 2 (L2) or through higher layer protocol information, as indicated byreference numeral 204 . Even when persistent scheduling information on the data channel is transmitted by L1/L2 signaling, ACK/NACK resource indication information can be transmitted by higher layer signaling. Since the transmission of the initial scheduling information is sufficient inpersistent scheduling 212, the explicit signaling of ACK/NACK indication information does not cause a significant increase in signaling overhead, although each TTI is allocated as many ACK/NACKs as needed resource.

在持续调度212中，在初始HARQ传输期间在持续调度的资源中发送数据。如果初始发送的数据有误，则节点B能够为HARQ重传显式调度数据信道资源。因此，在固定大小的资源组209内的ACKCH 207上为重传的数据发送ACK/NACK，该ACKCH 207隐式映射到在HARQ重传期间调度数据信道的SCCH 203的索引。替换地，能够在与可变大小的资源组210中的先前持续调度的ACKCH相同或不同的ACKCH上发送ACK/NACK。因此，用于初始HARQ传输的ACK/NACK资源能够被用于其他信道。Inpersistent scheduling 212, data is sent in persistently scheduled resources during the initial HARQ transmission. The Node B can explicitly schedule data channel resources for HARQ retransmissions if the initially transmitted data is incorrect. Therefore, ACK/NACK is sent for the retransmitted data on the ACKCH 207 within the fixed size resource group 209, which is implicitly mapped to the index of theSCCH 203 that schedules the data channel during HARQ retransmissions. Alternatively, the ACK/NACK can be sent on the same or different ACKCH as the previous persistently scheduled ACKCH in the variable-sized resource group 210 . Therefore, the ACK/NACK resources used for the initial HARQ transmission can be used for other channels.

例如，在ACK/NACK在ACKCH 207上被发送的情况下，为UE的持续调度的数据信道分配的ACK/NACK资源被限制于仅仅初始HARQ传输，其中ACKCH 207映射到在HARQ重传期间调度数据资源的SCCH的索引或形成SCCH的CCE的索引。由于节点B能够将分配给初始HARQ传输的ACK/NACK资源分配给其他UE的ACKCH或该UE的其他信道，因此资源使用效率被提高。换句话说，由持续数据调度持续分配的ACK/NACK资源仅对于初始HARQ传输有效，并且在HARQ重传期间由SCCH隐式指示的ACK/NACK资源被用于ACK/NACK传输。For example, where the ACK/NACK is sent on the ACKCH 207, the ACK/NACK resources allocated for the UE's persistently scheduled data channel are limited to only the initial HARQ transmission, where the ACKCH 207 maps to scheduling data during HARQ retransmissions The index of the SCCH of the resource or the index of the CCEs forming the SCCH. Resource usage efficiency is improved because the Node B can allocate the ACK/NACK resources allocated for the initial HARQ transmission to the ACKCH of other UEs or other channels of the UE. In other words, ACK/NACK resources continuously allocated by persistent data scheduling are only valid for initial HARQ transmission, and ACK/NACK resources implicitly indicated by SCCH during HARQ retransmission are used for ACK/NACK transmission.

上述ACK/NACK资源分配适用于下行链路和上行链路二者。对于下行链路数据传输，SCCH 203和204携带关于从节点B到UE的下行链路数据的资源分配信息，而ACKCH 207和208从UE向节点B传递关于该下行链路数据的ACK/NACK。对于上行链路数据传输，SCCH 203和204传递关于UE将向节点B发送的上行链路数据的资源分配信息，而ACKCH 207和208携带从节点B到UE的上行链路数据的ACK/NACK。The above ACK/NACK resource allocation applies to both the downlink and the uplink. For downlink data transmission,SCCH 203 and 204 carry resource allocation information about downlink data from Node B to UE, whileACKCH 207 and 208 convey ACK/NACK for this downlink data from UE to Node B. For uplink data transmission,SCCH 203 and 204 convey resource allocation information about the uplink data that the UE will send to Node B, whileACKCH 207 and 208 carry ACK/NACK for uplink data from Node B to UE.

图3是当与非持续调度信息类似通过L1/L2信令发送持续调度信息时，根据本发明的示范的下行链路调度的物理信道格式。参考数字300表示非持续SCCH的信息格式，以及参考数字301表示持续SCCH的信息格式。3 is an exemplary downlink scheduled physical channel format according to the present invention when persistent scheduling information is sent through L1/L2 signaling similar to non-persistent scheduling information. Reference numeral 300 denotes the information format of the non-persistent SCCH, and reference numeral 301 denotes the information format of the persistent SCCH.

参考图3，UE接收和解码SCCH的第一部分303(部分1)，并且基于调度类型指示符302确定该SCCH是用于非持续调度还是持续调度。UE通过接收和解码第二部分304(部分2)，根据调度类型指示符302获得调度信息305或306。调度信息305或306包括指示分配给数据信道的资源的资源指示信息、数据信道的调制和编码方案(MCS)级别、HARQ信息、和MIMO信息。Referring to FIG. 3 , the UE receives and decodes the first part 303 (part 1 ) of the SCCH, and determines based on thescheduling type indicator 302 whether the SCCH is for non-persistent scheduling or persistent scheduling. The UE obtainsscheduling information 305 or 306 from thescheduling type indicator 302 by receiving and decoding the second part 304 (part 2). Thescheduling information 305 or 306 includes resource indication information indicating resources allocated to the data channel, a modulation and coding scheme (MCS) level of the data channel, HARQ information, and MIMO information.

与非持续调度信息305相比，持续调度信息306还包括ACK/NACK资源指示信息和指示持续调度信息306有效的持续时间的调度持续时间信息。还能够预期的是该非持续SCCH格式300与持续SCCH格式301一致，并且调度持续时间信息和ACK/NACK指示信息分开地由L1/L2信令发送或由高层信令发送。Compared with thenon-persistent scheduling information 305, the persistent scheduling information 306 further includes ACK/NACK resource indication information and scheduling duration information indicating the duration for which the persistent scheduling information 306 is valid. It is also contemplated that the non-persistent SCCH format 300 is consistent with the persistent SCCH format 301, and that the scheduling duration information and the ACK/NACK indication information are separately signaled by L1/L2 or by higher layers.

当初始传输通过持续调度被调度和通过L1/L2信令发送时，ACK/NACK资源能够被SCCH隐式地指示，与非持续调度一样。ACK/NACK资源能够在持续调度的初始数据传输中或在不被SCCH指示的随后的数据传输中被显式信号发送，ACK/NACK资源能够被显式信号发送。例如，如果持续调度信息在SCCH#k上被信号发送至UE，则UE在由SCCH#k指示的数据信道资源中接收数据并在映射到SCCH#k的ACKCH#k上发送对于接收的数据的ACK/NACK。对于在数据信道资源上接收的随后的数据，UE在包括在数据信道资源中初始接收的数据中的高层信令信息明确指示的ACK/NACK资源中发送对于该数据的ACK/NACK。When the initial transmission is scheduled through persistent scheduling and sent through L1/L2 signaling, ACK/NACK resources can be implicitly indicated by SCCH, as with non-persistent scheduling. ACK/NACK resources can be explicitly signaled in the initial data transmission of persistent scheduling or in subsequent data transmissions not indicated by SCCH, ACK/NACK resources can be explicitly signaled. For example, if persistent scheduling information is signaled to the UE on SCCH #k, the UE receives data in the data channel resource indicated by SCCH #k and transmits an acknowledgment for the received data on ACKCH #k mapped to SCCH #k ACK/NACK. For subsequent data received on the data channel resource, the UE sends an ACK/NACK for the data in the ACK/NACK resource explicitly indicated by the higher layer signaling information included in the data initially received in the data channel resource.

以上ACKCH使用示例适用于关于数据信道的持续调度信息的高层信令。由于携带包括作为高层信令信息的持续调度信息的初始数据的数据信道被SCCH调度用于UE，因此UE在映射到SCCH或形成SCCH的CCE的ACK/NACK资源中发送ACK/NACK。在成功接收初始数据之后，UE在包括在初始数据中的高层信令信息指示的ACK/NACK资源中发送ACK/NACK。The above ACKCH usage example applies to higher layer signaling for persistent scheduling information for data channels. Since a data channel carrying initial data including persistent scheduling information as higher layer signaling information is scheduled by the SCCH for the UE, the UE transmits ACK/NACK in the ACK/NACK resource mapped to the SCCH or the CCE forming the SCCH. After successfully receiving the initial data, the UE transmits ACK/NACK in ACK/NACK resources indicated by higher layer signaling information included in the initial data.

图4说明根据本发明的另一ACK/NACK资源分配方案。4 illustrates another ACK/NACK resource allocation scheme according to the present invention.

参考图4，用于持续调度的数据信道的ACKCH 403共享具有CQICH 404的资源组405。UE在CQICH 404上发送关于下行链路信道的状态信息至节点B。节点B向每个UE显式指示对于CQICH的传输时序和资源，如参考数字401所示。与ACKCH 403类似，CQICH 404的数量对每个小区或每个TTI会改变。CQICH 404和ACKCH 403共享可变大小的资源组405且节点B通过根据情况移动资源边界402来控制在资源组405内分配给ACKCH 403和CQICH 404的资源。因此，整个资源被有效地使用。Referring to FIG. 4 , theACKCH 403 for the persistently scheduled data channel shares the resource group 405 with theCQICH 404 . The UE sends status information on the downlink channel to the Node B on theCQICH 404 . The Node B explicitly indicates to each UE the transmission timing and resources for the CQICH, as indicated by reference numeral 401 . Similar toACKCH 403, the number ofCQICH 404 may vary per cell or per TTI. TheCQICH 404 and theACKCH 403 share a variable-sized resource group 405 and the Node B controls the resources allocated to theACKCH 403 andCQICH 404 within the resource group 405 by moving theresource boundary 402 as appropriate. Therefore, the entire resource is used efficiently.

图5说明根据本发明的示范ACK/NACK资源分配。作为示例，遵从3GPP的EUTRA上行链路SC-FDMA标准来执行ACK/NACK资源分配。5 illustrates exemplary ACK/NACK resource allocation in accordance with the present invention. As an example, ACK/NACK resource allocation is performed in compliance with 3GPP's EUTRA uplink SC-FDMA standard.

参考图5，10MHz的传输带宽500被划分成50个资源单元(RU)501至504，每个RU具有12个副载波。通过向ACKCH和CQICH应用不同的序列或相同序列的不同的循环移位序列，ACKCH和CQICH通过码分复用(CDM)被复用在第1RU 501(RU#1)、第49RU 503(RU#49)和第50RU504(RU#50)中。在第2到第48RU 502(RU#2到RU#48)中通过频分复用(FDM)将ACKCH和CQICH与数据信道复用。Referring to FIG. 5, atransmission bandwidth 500 of 10 MHz is divided into 50 resource units (RUs) 501 to 504, each RU having 12 subcarriers. By applying different sequences or different cyclic shift sequences of the same sequence to the ACKCH and the CQICH, the ACKCH and the CQICH are multiplexed on the 1st RU 501 (RU#1), the 49th RU 503 (RU#) by code division multiplexing (CDM). 49) and No. 50RU504 (RU#50). The ACKCH and CQICH are multiplexed with the data channel by frequency division multiplexing (FDM) in the 2nd to 48th RUs 502 (RU#2 to RU#48).

用于非持续调度的数据信道的M个ACKCH：ACKCH#1到ACKCH#M通过CDM在RU#1中传输，以及RU#1中的剩余CDM资源被分配给用于持续调度的数据信道的ACKCH#(M+1)到ACKCH#12。除了ACKCH#(M+1)到ACKCH#12，RU#49和RU#50被用作持续调度的数据信道的ACK/NACK资源。在具有少量的持续调度的数据信道的TTI中，RU#49和RU#50被用于数据信道，以及RU#2到RU#48用于数据信道505，或它们专用于CQICH。M ACKCHs for non-persistently scheduled data channels:ACKCH#1 to ACKCH#M are transmitted inRU#1 via CDM, and the remaining CDM resources inRU#1 are allocated to ACKCHs for persistently scheduled data channels #(M+1) toACKCH#12. In addition to ACKCH#(M+1) toACKCH#12,RU#49 andRU#50 are used as ACK/NACK resources for persistently scheduled data channels. In a TTI with a small number of persistently scheduled data channels,RU#49 andRU#50 are used for the data channel, andRU#2 toRU#48 are used for thedata channel 505, or they are dedicated to the CQICH.

虽然在图5中RU#49被分配给第1个到第K个CQICH 509到510(CQICH#1到CQICH#K)，但是没有必要在RU#49中划界且CQICH也能够被分配在RU#50中。由于ACK/NACK资源和CQICH资源的数量和索引是基于TTI被控制的，因此能够有效使用与所需要的一样多的无线资源。AlthoughRU#49 is allocated to 1st toKth CQICHs 509 to 510 (CQICH#1 to CQICH#K) in FIG. 5, it is not necessary to demarcate inRU#49 and CQICH can also be allocated in RU in #50. Since the number and index of ACK/NACK resources and CQICH resources are controlled based on TTI, it is possible to effectively use as many radio resources as needed.

替代信号发送的绝对值，这些绝对值例如CDM序列的循环移位值，额外的正交序列索引，和向UE发送的作为关于在可变大小资源组405中用于持续调度的数据信道的CQICH和ACKCH的资源指示信息的RU索引，相对可变大小的ACKCH资源组的边界的偏移能够被信号发送到UE。当通过组合图5所示的CDM序列的循环移位值、正交序列索引、发送的RU索引定义每个上行链路信道索引时，该偏移表示相对于在可变大小的ACKCH资源组的边界的ACKCH#M的相对索引。例如，ACKCH#(M+m)由偏移m指示。Substitute signaled absolute values such as the cyclic shift value of the CDM sequence, the additional orthogonal sequence index, and the CQICH sent to the UE as a data channel for persistent scheduling in the variable size resource group 405 and the RU index of the resource indication information of the ACKCH, the offset relative to the boundary of the variable-sized ACKCH resource group can be signaled to the UE. When each uplink channel index is defined by combining the cyclic shift value, orthogonal sequence index, and transmitted RU index of the CDM sequence shown in FIG. Relative index of the boundary's ACKCH#M. For example, ACKCH#(M+m) is indicated by offset m.

图6是根据本发明的节点B的操作的流程图。Figure 6 is a flow diagram of the operation of a Node B according to the present invention.

参考图6，在步骤600，节点B为UE准备调度下行链路和上行链路数据信道和ACKCH。具体地，节点B收集调度所需的信息，诸如数据业务的调度类型、缓冲状态和资源状态。在步骤601，节点B确定数据信道的调度类型和数据信道的传输格式，诸如分配的资源和MCS级别，然后根据确定的结果格式化调度信息。Referring to FIG. 6, atstep 600, the Node B prepares to schedule downlink and uplink data channels and ACKCH for the UE. Specifically, Node B collects information required for scheduling, such as scheduling type, buffer status and resource status of data traffic. Instep 601, the Node B determines the scheduling type of the data channel and the transmission format of the data channel, such as allocated resources and MCS level, and then formats the scheduling information according to the determined result.

在步骤602，节点B确定该调度类型是持续还是非持续的。在持续调度的情况下，在步骤603，节点B确定ACK/NACK资源并且格式化ACK/NACK资源指示信息以将ACK/NACK资源通知UE。根据数据信道的业务特征确定调度类型。在步骤604，节点B通过L1/L2信令或高层信令发送数据信道的调度信息和ACK/NACK资源指示信息。Atstep 602, Node B determines whether the scheduling type is persistent or non-persistent. In the case of persistent scheduling, instep 603, the Node B determines ACK/NACK resources and formats the ACK/NACK resource indication information to notify the UE of the ACK/NACK resources. The scheduling type is determined according to the traffic characteristics of the data channel. Instep 604, the Node B sends scheduling information and ACK/NACK resource indication information of the data channel through L1/L2 signaling or higher layer signaling.

在非持续调度的情况下，根据映射到数据信道的SCCH的索引确定ACK/NACK资源。因此，在步骤605，节点B在具有SCCH索引的SCCH上向UE仅发送数据信道的调度信息。In the case of non-persistent scheduling, ACK/NACK resources are determined according to the index of the SCCH mapped to the data channel. Therefore, instep 605, the Node B sends only the scheduling information of the data channel to the UE on the SCCH with the SCCH index.

图7A是根据本发明的UE的操作的流程图。Figure 7A is a flow diagram of the operation of the UE according to the present invention.

参考图7A，在步骤700，UE通过解码在每个调度间隔(即每个TTI)的SCCH获得调度信息，并且在步骤701，确定在当前的调度间隔中是否有分配给UE的数据信道资源，也即，依据调度信息确定UE是否已经在当前调度间隔中被调度。如果UE没有被调度，则UE返回步骤700。如果UE已经被调度，则当上行链路数据被调度时其根据调度信息发送调度的数据，或者当下行链路数据接收被调度时其根据调度信息来接收和解码调度的数据。7A, in step 700, the UE obtains scheduling information by decoding the SCCH in each scheduling interval (ie, each TTI), and instep 701, it is determined whether there are data channel resources allocated to the UE in the current scheduling interval, That is, it is determined whether the UE has been scheduled in the current scheduling interval according to the scheduling information. If the UE is not scheduled, the UE returns to step 700 . If the UE has been scheduled, it transmits the scheduled data according to the scheduling information when uplink data is scheduled, or receives and decodes the scheduled data according to the scheduling information when downlink data reception is scheduled.

在步骤703，UE确定在步骤702中使用的数据的调度类型是持续还是非持续的。UE能够根据调度信息的指示符或数据信道的业务特征来确定调度类型。在持续调度类型的情况下，在步骤704，UE检测当数据通过持续调度被初始调度时显式指示的ACK/NACK资源，并且在步骤706，在下行链路数据接收被调度时在ACKCH资源中向节点B发送ACK/NACK，或者在上行链路数据传输被调度时在ACKCH资源中从节点B接收ACK/NACK。Instep 703, the UE determines whether the scheduling type of the data used instep 702 is persistent or non-persistent. The UE can determine the scheduling type according to the indicator of the scheduling information or the traffic characteristics of the data channel. In the case of persistent scheduling type, atstep 704, the UE detects the ACK/NACK resources that are explicitly indicated when data is initially scheduled by persistent scheduling, and atstep 706, instep 706, in the ACKCH resource when downlink data reception is scheduled The ACK/NACK is sent to the Node B or received from the Node B in the ACKCH resource when uplink data transmission is scheduled.

在非持续调度类型的情况下，在步骤705，UE检测隐式映射到与非持续调度的数据信道对应的SCCH的ACK/NACK资源，并且在步骤706中，在ACK/NACK资源中向节点B发送ACK/NACK或从节点B接收ACK/NACK。In case of non-persistent scheduling type, instep 705, the UE detects the ACK/NACK resources implicitly mapped to the SCCH corresponding to the non-persistently scheduled data channel, and instep 706, in the ACK/NACK resources to the Node B Send ACK/NACK or receive ACK/NACK from Node B.

图7B是根据本发明的当UE在上行链路上发送用于持续调度的数据信道的ACK/NACK时UE的操作的流程图。7B is a flowchart of the operation of the UE when the UE transmits ACK/NACK for persistently scheduled data channels on the uplink in accordance with the present invention.

参考图7B，在步骤711，UE接收持续调度信息，持续调度信息通过L1/L2信令或高层信令持续调度用于下行链路数据信道和上行链路ACKCH的资源。也即，该持续调度信息包括用于上行链路ACKCH的ACK/NACK资源指示信息。在步骤712，UE根据持续调度信息在持续调度的数据信道上周期性地接收数据分组。Referring to FIG. 7B , instep 711, the UE receives persistent scheduling information that persistently schedules resources for downlink data channels and uplink ACKCH through L1/L2 signaling or higher layer signaling. That is, the persistent scheduling information includes ACK/NACK resource indication information for uplink ACKCH. Instep 712, the UE periodically receives data packets on the persistently scheduled data channel according to the persistent scheduling information.

在步骤713，UE确定该数据分组是初始HARQ传输分组或HARQ重传分组。在初始HARQ传输的情况下，UE前进到步骤715，在HARQ重传的情况下，UE进入步骤714。在步骤715，UE在步骤701中显式指示的ACK/NACK资源中发送对于数据分组的ACK/NACK。在步骤714中，UE确定该持续调度信息是否已经连同该数据分组一起被接收。如果它们被分别接收，则在步骤715中，在步骤701中显式指示的ACK/NACK资源中发送对于数据分组的ACK/NACK。如果它们已经被一起接收，则在步骤716中，UE在映射到SCCH或SCCH的CCE的ACKCH上发送ACK/NACK。Atstep 713, the UE determines that the data packet is an initial HARQ transmission packet or a HARQ retransmission packet. In the case of initial HARQ transmission, the UE proceeds to step 715, and in the case of HARQ retransmission, the UE proceeds to step 714. Instep 715, the UE sends ACK/NACK for the data packet in the ACK/NACK resource explicitly indicated instep 701. Instep 714, the UE determines whether the persistent scheduling information has been received along with the data packet. If they are received separately, then instep 715 the ACK/NACK for the data packet is sent in the ACK/NACK resource explicitly indicated instep 701. If they have been received together, instep 716, the UE sends an ACK/NACK on the ACKCH of the CCE mapped to the SCCH or SCCH.

图8是根据本发明的节点B装置的框图。Figure 8 is a block diagram of a Node B apparatus according to the present invention.

参考图8，数据信道调度器800通过调度数据信道确定用于数据的无线资源和MCS级别。调度信息产生器803产生代表数据信道调度器800的确定结果的调度信息，控制信道产生器805信道编码该调度信息并将其在SCCH上发送。能够通过L1/L2信令或高层信令发送该调度信息。Referring to FIG. 8, adata channel scheduler 800 determines radio resources and MCS levels for data by scheduling data channels. Thescheduling information generator 803 generates scheduling information representing the determination result of thedata channel scheduler 800, and thecontrol channel generator 805 channel encodes the scheduling information and transmits it on the SCCH. The scheduling information can be sent through L1/L2 signaling or higher layer signaling.

控制器801确定使用隐式映射到SCCH的ACK/NACK资源用于非持续调度的数据信道。对于持续调度的数据信道，控制器801确定需要在可变大小的资源组中分配的ACK/NACK资源。控制器801将该确定结果通知ACKCH调度器802。Thecontroller 801 determines to use the ACK/NACK resources implicitly mapped to the SCCH for the non-persistently scheduled data channel. For persistently scheduled data channels, thecontroller 801 determines the ACK/NACK resources that need to be allocated in variable-sized resource groups. Thecontroller 801 notifies theACKCH scheduler 802 of the determination result.

ACKCH调度器802确定分配给用于数据信道的ACKCH的资源。在控制器801的控制下，其并不为非持续调度的数据信道调度ACKCH，而仅为持续调度的数据信道分配可变大小的资源组中的ACKCH的资源。指示信息产生器804产生显式指示ACKCH调度器802的确定结果的ACK/NACK资源指示信息。控制信道产生器805信道编码该ACK/NACK资源指示信息并将其通过L1/L2信令或高层信令发送。TheACKCH scheduler 802 determines the resources allocated for the ACKCH for the data channel. Under the control of thecontroller 801, it does not schedule ACKCH for non-persistently scheduled data channels, but allocates ACKCH resources in variable-sized resource groups only for persistently scheduled data channels. Theindication information generator 804 generates ACK/NACK resource indication information that explicitly indicates the determination result of theACKCH scheduler 802 . Thecontrol channel generator 805 channel encodes the ACK/NACK resource indication information and sends it through L1/L2 signaling or higher layer signaling.

图9是根据本发明的UE的接收机的框图。9 is a block diagram of a receiver of a UE according to the present invention.

参考图9，SCCH解码器900从接收的(RX)信号906中检测映射到SCCH资源的SCCH信号并通过解码SCCH信号获得调度信息。当调度信息的解码成功时，控制器901确定该调度信息指示持续还是非持续调度类型。在持续调度类型的情况下，控制器901根据ACK/NACK资源信令方案控制复用器(MUX)902以向指示信息解码器903提供指示接收信号中的ACK/NACK资源的信令信号。如果ACK/NACK资源的信令信号包括在调度信息中，则MUX 902选择调度信息并将其提供至指示信息解码器903。Referring to FIG. 9, theSCCH decoder 900 detects the SCCH signal mapped to the SCCH resource from the received (RX) signal 906 and obtains scheduling information by decoding the SCCH signal. When the decoding of the scheduling information is successful, thecontroller 901 determines whether the scheduling information indicates a persistent or non-persistent scheduling type. In the case of persistent scheduling type, thecontroller 901 controls the multiplexer (MUX) 902 according to the ACK/NACK resource signaling scheme to provide theindication information decoder 903 with a signaling signal indicating the ACK/NACK resource in the received signal. If the signaling signal of the ACK/NACK resource is included in the scheduling information, theMUX 902 selects the scheduling information and provides it to theindication information decoder 903 .

指示信息解码器903通过解码包括在调度信息中的信令信号获得ACK/NACK资源指示信息。在下行链路数据接收期间，ACK/NACK资源指示信息被用于ACK/NACK产生器和映射器904以产生用于下行链路数据的ACK/NACK并且将ACK/NACK映射到ACK/NACK资源。对于上行链路数据传输，ACK/NACK资源指示信息被用于ACK/NACK检测器905以便从RX信号906中检测映射到ACK/NACK资源的ACK/NACK。Theindication information decoder 903 obtains ACK/NACK resource indication information by decoding the signaling signal included in the scheduling information. During downlink data reception, the ACK/NACK resource indication information is used in the ACK/NACK generator andmapper 904 to generate ACK/NACK for downlink data and map the ACK/NACK to ACK/NACK resources. For uplink data transmission, ACK/NACK resource indication information is used in ACK/NACK detector 905 to detect ACK/NACK mapped to ACK/NACK resources from RX signal 906 .

在非持续调度的情况下，控制器901检测隐式映射到指示资源用于非持续数据信道的资源的SCCH的ACK/NACK资源，并且将ACK/NACK资源通知ACK/NACK产生器和映射器904以用于ACK/NACK发送或接收。In the case of non-persistent scheduling, thecontroller 901 detects the ACK/NACK resource implicitly mapped to the SCCH indicating the resource for the resource for the non-persistent data channel, and notifies the ACK/NACK generator andmapper 904 of the ACK/NACK resource for ACK/NACK transmission or reception.

实施例2Example 2

图10说明根据本发明的另一实施例的用于MIMO系统的ACK/NACK资源分配方案。10 illustrates an ACK/NACK resource allocation scheme for a MIMO system according to another embodiment of the present invention.

MIMO方案被分类为单码字MIMO(SCW-MIMO)和多码字MIMO(MCW-MIMO)。在发射机同时发送多个码字的MCW-MIMO中，对于每个码字执行解码。因此，需要与发送的码字一样多的ACKCH。如图10所示，因此，在被非持续调度的MCW-MIMO数据信道上的至少一个码字(如第一码字)的ACKCH使用映射到用于第一码字的SCCH的索引的ACK/NACK资源，如参考数字1000所示，而剩余码字的ACK/NACK资源随同用于非持续调度的MCW-MIMO数据信道的SCCH 1002一起被显式信号发送，如参考数字1003所示。ACK/NACK资源与用于持续调度的数据信道的ACKCH共享可变大小的资源组1005。MIMO schemes are classified into single codeword MIMO (SCW-MIMO) and multiple codeword MIMO (MCW-MIMO). In MCW-MIMO where the transmitter transmits multiple codewords simultaneously, decoding is performed for each codeword. Therefore, as many ACKCHs as transmitted codewords are required. As shown in Figure 10, therefore, the ACKCH of at least one codeword (eg, the first codeword) on the non-persistently scheduled MCW-MIMO data channel uses the ACK/ NACK resources, as indicated byreference numeral 1000, and ACK/NACK resources for the remaining codewords are explicitly signaled, as indicated byreference numeral 1003, along withSCCH 1002 for the non-persistently scheduled MCW-MIMO data channel. The ACK/NACK resources share a variable-sized resource group 1005 with the ACKCH for persistently scheduled data channels.

也即，对于MCW-MIMO数据的非持续调度，考虑基于TTI的ACK/NACK资源1005的分配状态，节点B为还没有分配ACK/NACK资源的码字分配可变大小的ACK/NACK资源1005的一部分，这如参考数字1003所示。在用于非持续调度的MCW-MIMO数据信道的ACKCH和用于持续调度的MCW-MIMO数据信道的ACKCH之间共享资源组1005导致无线资源的有效使用。That is, for non-persistent scheduling of MCW-MIMO data, considering the allocation status of TTI-based ACK/NACK resources 1005, the Node B allocates variable-sized ACK/NACK resources 1005 to codewords for which ACK/NACK resources have not been allocated. In part, this is indicated byreference numeral 1003. Sharing the resource group 1005 between the ACKCH for the non-persistently scheduled MCW-MIMO data channel and the ACKCH for the persistently scheduled MCW-MIMO data channel results in efficient use of radio resources.

对于非MIMO和SCW-MIMO数据信道，使用由SCCH 1001的索引隐式信号发送的ACK/NACK资源，如参考数字1006所示，如前所述。因此，在固定大小的资源组1004内的ACKCH上发送用于非MIMO和SCW-MIMO数据信道的ACK/NACK。For non-MIMO and SCW-MIMO data channels, the ACK/NACK resources implicitly signaled by the index ofSCCH 1001 are used, as indicated by reference numeral 1006, as previously described. Therefore, ACK/NACK for non-MIMO and SCW-MIMO data channels are sent on the ACKCH within the fixed size resource group 1004.

实施例3Example 3

图11说明根据本发明的第三实施例的ACK/NACK资源分配方案。考虑ACKCH的小区覆盖来分配ACK/NACK资源。这里，考虑3GPP EUTRA标准，其中定义1ms的TTI。FIG. 11 illustrates an ACK/NACK resource allocation scheme according to a third embodiment of the present invention. The ACK/NACK resources are allocated in consideration of the cell coverage of the ACKCH. Here, consider the 3GPP EUTRA standard, in which a TTI of 1 ms is defined.

ACKCH的小区覆盖被定义为在其中能够稳定检测到ACKCH的小区半径。为了对有限的最大发送功率扩展小区覆盖，有必要通过增加ACKCH的传输持续时间来增加在接收机处的ACKCH的接收能量。可是，随着ACKCH的传输持续时间增加，ACKCH占用的资源数量也成比例地增加。The cell coverage of the ACKCH is defined as the radius of the cell in which the ACKCH can be stably detected. In order to extend the cell coverage for the limited maximum transmit power, it is necessary to increase the received energy of the ACKCH at the receiver by increasing the transmission duration of the ACKCH. However, as the transmission duration of the ACKCH increases, the amount of resources occupied by the ACKCH increases proportionally.

因此，为了无线资源的有效使用，用于持续调度的数据信道的可变大小的资源组1101被划分成具有1ms的传输持续时间的第一资源组1107和具有0.5ms的传输持续时间的第二资源组1108。具有0.5ms的传输持续时间1105的ACKCH#2.x和具有1ms的传输持续时间1104的ACKCH#1.x被分配给经历持续调度的UE。分配的ACKCH的传输持续时间由ACK/NACK资源指示信息指示，或根据ACK/NACK资源的位置或ACKCH的索引在系统和UE之间预先设定。Therefore, for efficient use of radio resources, the variable-sized resource group 1101 for persistently scheduled data channels is divided into afirst resource group 1107 with a transmission duration of 1 ms and asecond resource group 1107 with a transmission duration of 0.5ms Resource group 1108. ACKCH #2.x with transmission duration 1105 of 0.5 ms and ACKCH #1.x with transmission duration 1104 of 1 ms are allocated to UEs undergoing persistent scheduling. The transmission duration of the allocated ACKCH is indicated by the ACK/NACK resource indication information, or preset between the system and the UE according to the position of the ACK/NACK resource or the index of the ACKCH.

对于接近节点B的UE，其具有足够的传输功率，节点B指示该UE通过分配第二资源组1108中的ACKCH#2.x来发送0.5ms的高功率的ACK/NACK，由此减少ACK/NACK资源开销。对于位于小区边界的UE，其不具有足够的传输功率，节点B通过向UE分配第一资源组1107中的ACKCH#1.x来增加ACKCH的接收能量，由此增加ACK/NACK的检测概率。节点B能够通过UE报告的信道状态、从UE接收的信号的信号强度或UE的地理位置来确定UE是在附近或位于小区的边界。For UEs close to the Node B, which have sufficient transmit power, the Node B instructs the UE to send a high power ACK/NACK for 0.5ms by allocating ACKCH #2.x in thesecond resource group 1108, thereby reducing ACK/NACK NACK resource overhead. For UEs located at the cell boundary, which do not have sufficient transmit power, the Node B increases the received energy of ACKCH by allocating ACKCH #1.x in thefirst resource group 1107 to the UE, thereby increasing the detection probability of ACK/NACK. The Node B can determine whether the UE is nearby or at the border of the cell by the channel state reported by the UE, the signal strength of the signal received from the UE, or the geographic location of the UE.

在第一和第二资源组1107和1108之间的边界1106随每个小区和每个TTI而改变。第二资源组1108的ACKCH并非总是连读地被传输0.5ms。例如，ACKCH#2.1和ACKCH#2.2在非连续的两个2.5ms持续时间中被交替发送，并且跳频能够在下一0.5ms时间段期间发生。例如，ACKCH#1在介于0和0.25ms之间以及介于0.5和0.75ms之间的非连续时间段期间被发送，而ACKCH#2在介于0.25和0.5ms之间以及介于0.75和1ms之间的非连续时间段期间被发送。对于第一0.5ms时间段，ACKCH#1和ACKCH#2在第一频率资源(如RU#1)中被发送，而对于下一0.5ms时间段，它们跳到第二频率资源(如RU#50)。在这种情况下，ACKCH#2.x的总传输持续时间是0.5ms，但是由于传输是非连续和跳频的，因此实现了时间和频率分集。可变大小的ACK/NACK资源1101能够在CQICH和用于MCW-MIMO数据信道的ACKCH以及用于持续调度的数据的ACKCH之间共享。The boundary 1106 between the first andsecond resource groups 1107 and 1108 varies per cell and per TTI. The ACKCH of thesecond resource group 1108 is not always transmitted continuously for 0.5 ms. For example, ACKCH #2.1 and ACKCH #2.2 are alternately sent in two non-consecutive 2.5ms durations, and frequency hopping can occur during the next 0.5ms time period. For example,ACKCH#1 is sent during non-consecutive time periods between 0 and 0.25ms and between 0.5 and 0.75ms, whileACKCH#2 is sent between 0.25 and 0.5ms and between 0.75 and 0.75ms are sent during non-consecutive time periods between 1ms. For the first 0.5ms period,ACKCH#1 andACKCH#2 are sent in the first frequency resource (eg RU#1), and for the next 0.5ms period, they hop to the second frequency resource (eg RU#) 50). In this case, the total transmission duration of ACKCH#2.x is 0.5ms, but since the transmission is non-consecutive and frequency hopping, time and frequency diversity is achieved. Variable size ACK/NACK resources 1101 can be shared between CQICH and ACKCH for MCW-MIMO data channel and ACKCH for persistently scheduled data.

另一方面，由于用于非持续调度的数据信道的ACKCH根据每个TTI中的SCCH的索引被动态分配，因此固定大小的资源组1100的ACKCH共同地具有1ms传输持续时间1103以阻止小区覆盖问题。固定大小的资源组1100的ACKCH能够在码域或频域1102中被复用。On the other hand, since the ACKCH for the non-persistently scheduled data channel is dynamically allocated according to the index of the SCCH in each TTI, the ACKCHs of the fixed size resource group 1100 collectively have a1ms transmission duration 1103 to prevent cell coverage issues . The ACKCH of the fixed size resource group 1100 can be multiplexed in the code domain or the frequency domain 1102 .

实施例4Example 4

图12说明根据本发明的第四实施例的ACK/NACK资源分配方案。FIG. 12 illustrates an ACK/NACK resource allocation scheme according to a fourth embodiment of the present invention.

参考图12，用于非持续调度的数据信道的ACK/NACK使用映射到用于数据信道的SCCH的固定大小的资源组1202的ACK/NACK资源，如同本发明的第一示范实施例一样。ACK/NACK资源能够被映射到形成SCCH的至少一个CCE，而非SCCH。在这种情况下，用于由SCCH指示的数据信道的ACKCH使用对应于形成SCCH的CCE中的至少一个，且UE通过CCE索引隐式找到ACK/NACK资源。12, ACK/NACK for non-persistently scheduled data channel uses ACK/NACK resources mapped to a fixed-size resource group 1202 of SCCH for data channel, as in the first exemplary embodiment of the present invention. The ACK/NACK resources can be mapped to at least one CCE forming the SCCH instead of the SCCH. In this case, the ACKCH for the data channel indicated by the SCCH uses at least one corresponding to the CCEs forming the SCCH, and the UE implicitly finds the ACK/NACK resource through the CCE index.

与本发明的第一实施例相比，本发明的第四实施例的特征在于固定大小的资源组1202的资源和可变大小的资源组1205的资源可用于持续调度的数据信道的ACKCH、CQICH和其他信道中的至少一个。Compared with the first embodiment of the present invention, the fourth embodiment of the present invention is characterized in that the resources of the fixed size resource group 1202 and the resources of the variable size resource group 1205 can be used for the ACKCH, CQICH of the persistently scheduled data channel and at least one of the other channels.

例如，当由于小区中的少量激活UE或TTI中少量调度的UE而使用少量SCCH时，除了映射到使用的SCCH的ACK/NACK资源外，大量资源剩余在固定大小的资源组1202中。在这种情况下，节点B通过显式指示1204向UE分配剩余资源和可变大小的资源组1205，以使得剩余资源被用于持续调度的数据信道的ACKCH、CQICH和其他信道中的至少一个。UE使用该剩余资源用于持续调度的数据信道的ACKCH、CQICH和其他信道。For example, when a small amount of SCCH is used due to a small number of active UEs in a cell or a small number of scheduled UEs in a TTI, a large amount of resources remain in the fixed-size resource group 1202 in addition to the ACK/NACK resources mapped to the used SCCH. In this case, the Node B allocates the remaining resources and variable-sized resource groups 1205 to the UE by explicitly instructing 1204 such that the remaining resources are used for at least one of the ACKCH, CQICH and other channels of the persistently scheduled data channel . The UE uses the remaining resources for the ACKCH, CQICH and other channels of the persistently scheduled data channel.

由以上说明明白，本发明通过根据数据的非持续调度类型或持续调度类型应用合适的ACK/NACK资源分配和信令方案来增加资源使用效率和减少信令开销。可用于传输的资源的增加结果增加了系统容量。As apparent from the above description, the present invention increases resource usage efficiency and reduces signaling overhead by applying appropriate ACK/NACK resource allocation and signaling schemes according to the non-persistent scheduling type or persistent scheduling type of data. The increase in resources available for transmission results in increased system capacity.

尽管参考本发明的特定示范实施例对本发明进行了说明和描述，但是本领域技术人员将会理解，在不脱离由所附权利要求书和其等价物定义的本发明的范围和精神的情况下，可以在形式和细节上对本发明进行各种变化。Although the invention has been illustrated and described with reference to specific exemplary embodiments of the invention, those skilled in the art will appreciate that, without departing from the scope and spirit of the invention as defined by the appended claims and their equivalents, Various changes in form and details may be made in the present invention.

Claims (20)

1. A method of receiving a physical downlink control channel in a wireless communication system, the method comprising:

receiving a physical downlink control channel;

decoding the received physical downlink control channel;

determining a scheduling type of a data channel as persistent scheduling or non-persistent scheduling using information related to the scheduling type included in the received physical downlink control channel; and

determining scheduling information for the data channel according to the determined scheduling type;

transmitting Ack/Nack information for a data channel on a resource which is one of pre-configured resources in case that the scheduling type is determined as non-persistent scheduling;

transmitting Ack/Nack information for the data channel on a resource that is one of pre-configured resources in a case where a scheduling type is determined as persistent scheduling and the data channel is used for initial persistent data; and

in case that the scheduling type is determined as persistent scheduling and the data channel is used for persistent data following the initial persistent data, Ack/Nack information for the data channel is transmitted on resources indicated by resource indication information received via higher layer signaling.

2. The method of claim 1, wherein the persistent scheduling includes persistent maintenance of validity of the initial scheduling information or scheduling of validity of the initial scheduling information for a corresponding time interval, and

wherein the non-persistent scheduling includes scheduling in which the validity of the initial scheduling information is not continuously maintained or the validity of the initial scheduling information is not maintained for a corresponding time interval.

3. The method of claim 1, wherein the scheduling information includes resource information indicating resources allocated for the data channel, a Modulation and Coding Scheme (MCS) of the data channel, and hybrid automatic repeat request (HARQ) information.

4. The method of claim 1, wherein the pre-configured resource and the resource indicated by resource indication information are configured independently.

5. The method of claim 1, wherein the resource that is one of the preconfigured resources is associated with a physical downlink control channel.

6. An apparatus for receiving a physical downlink control channel in a wireless communication system, the apparatus comprising:

a receiver configured to receive a physical downlink control channel; and

a decoder configured to:

decoding the received physical downlink control channel,

determining a scheduling type of the data channel as persistent scheduling or non-persistent scheduling using information related to the scheduling type included in the received physical downlink control channel, an

Determining scheduling information for the data channel according to the determined information related to the scheduling type; and

a transmitter configured to:

transmitting Ack/Nack information for a data channel on a resource that is one of pre-configured resources in case that the scheduling type is determined to be non-persistent scheduling;

transmitting Ack/Nack information for a data channel on a resource that is one of pre-configured resources in a case where a scheduling type is determined as persistent scheduling and the data channel is used for initial persistent data; and

in case that the scheduling type is determined as persistent scheduling and the data channel is used for persistent data following the initial persistent data, Ack/Nack information for the data channel is transmitted on resources indicated by resource indication information received via higher layer signaling.

7. The apparatus of claim 6, wherein the persistent scheduling includes a persistent maintenance of validity of the initial scheduling information or a scheduling of validity of the initial scheduling information for a corresponding time interval, and

wherein the non-persistent scheduling includes scheduling in which validity of the initial scheduling information is not continuously maintained or the validity of the initial scheduling information is not maintained for a corresponding time interval.

8. The apparatus of claim 6, wherein the scheduling information comprises resource information indicating resources allocated for the data channel, a Modulation and Coding Scheme (MCS) of the data channel, and hybrid automatic repeat request (HARQ) information.

9. The apparatus of claim 6, wherein the pre-configured resources and the resources indicated by resource indication information are configured independently.

10. The apparatus of claim 6, the resource that is one of the preconfigured resources being associated with a physical downlink control channel.

11. A method of transmitting a physical downlink control channel in a wireless communication system, the method comprising the steps of:

determining the scheduling type of the data channel as persistent scheduling or non-persistent scheduling;

transmitting a physical downlink control channel including scheduling information indicating a scheduling type and scheduling information for a data channel,

receiving Ack/Nack information for a data channel on a resource that is one of pre-configured resources in case that the scheduling type is non-persistent scheduling;

receiving Ack/Nack information for a data channel on a resource that is one of pre-configured resources in a case where a scheduling type is persistent scheduling and the data channel is for initial persistent data; and

in case that the scheduling type is persistent scheduling and the data channel is for persistent data following the initial persistent data, Ack/Nack information for the data channel is received on a resource indicated by resource indication information received via higher layer signaling.

12. The method of claim 11, wherein the persistent scheduling includes persistent maintenance of validity of the initial scheduling information or scheduling of validity of the initial scheduling information for a corresponding time interval, and

wherein the non-persistent scheduling includes scheduling in which the validity of the initial scheduling information is not continuously maintained or the validity of the initial scheduling information is not maintained for a corresponding time interval.

13. The method of claim 11, wherein the scheduling information includes resource information indicating resources allocated for the data channel, a Modulation and Coding Scheme (MCS) of the data channel, and hybrid automatic repeat request (HARQ) information.

14. The method of claim 11, wherein the pre-configured resource and the resource indicated by resource indication information are configured independently.

15. The method of claim 11, wherein the resource that is one of the preconfigured resources is associated with a physical downlink control channel.

16. An apparatus for transmitting a physical downlink control channel in a wireless communication system, the apparatus comprising:

a controller configured to determine a scheduling type of a data channel as persistent scheduling or non-persistent scheduling;

a transmitter configured to transmit a physical downlink control channel including scheduling information indicating a scheduling type and scheduling information of a data channel; and

a receiver configured to:

receiving Ack/Nack information for a data channel on a resource that is one of pre-configured resources in case that the scheduling type is non-persistent scheduling;

receiving Ack/Nack information for a data channel on a resource that is one of pre-configured resources in a case where a scheduling type is persistent scheduling and the data channel is for initial persistent data; and

in case that the scheduling type is persistent scheduling and the data channel is for persistent data following the initial persistent data, Ack/Nack information for the data channel is received on a resource indicated by resource indication information received via higher layer signaling.

17. The apparatus of claim 16, wherein the persistent scheduling includes persistent maintenance of validity of the initial scheduling information or scheduling of validity of the initial scheduling information for a corresponding time interval, and

wherein the non-persistent scheduling includes scheduling in which the validity of the initial scheduling information is not continuously maintained or the validity of the initial scheduling information is not maintained for a corresponding time interval.

18. The apparatus of claim 16, wherein the scheduling information comprises resource information indicating resources allocated for the data channel, a Modulation and Coding Scheme (MCS) of the data channel, and hybrid automatic repeat request (HARQ) information.

19. The apparatus of claim 16, wherein the pre-configured resources and the resources indicated by resource indication information are configured independently.

20. The apparatus of claim 16, wherein the resource that is one of the preconfigured resources is associated with a physical downlink control channel.

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