CN106879076B - Data transmission method and device - Google Patents
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Abstract
本申请公开了一种数据传输的方法及装置,涉及通信技术领域,能够解决基站利用非授权频段传输业务数据效率低的问题。本申请的数据传输的方法包括:当基站需向目的终端发送数据时,基站获取所述目的终端的用户组标识,基站从本地获取该目的终端的用户组标识对应的有效CSI测量结果;根据有效CSI测量结果向该目的终端发送数据。本申请适用于传输数据的过程中。
The present application discloses a method and a device for data transmission, which relate to the field of communication technologies and can solve the problem of low efficiency in transmitting service data by a base station using an unlicensed frequency band. The data transmission method of the present application includes: when a base station needs to send data to a destination terminal, the base station acquires the user group identifier of the destination terminal, and the base station locally acquires a valid CSI measurement result corresponding to the user group identifier of the destination terminal; The CSI measurement result sends data to the destination terminal. This application applies to the process of transferring data.
Description
技术领域technical field
本申请涉及通信技术领域,尤其涉及一种数据传输的方法及装置。The present application relates to the field of communication technologies, and in particular, to a method and apparatus for data transmission.
背景技术Background technique
在长期演进(Long Term Evolution,LTE)的频分双工(Frequency DivisionDual,FDD)系统中,基站向用户设备发送数据时,需先请求用户设备进行信道状态信息(Channel State Information,CSI)测量并反馈CSI测量结果。基站从反馈的CSI测量结果中获知当前下行链路的信道条件,选择相应的传输方案来实现下行数据的高速传输。由于LTE系统是工作在授权频段的,基站拥有授权频段的绝对使用权,因此,基站总能接收到终端的反馈的CSI测量结果,并向终端发送数据。In the Long Term Evolution (LTE) frequency division duplex (Frequency Division Dual, FDD) system, when the base station sends data to the user equipment, it needs to first request the user equipment to perform Channel State Information (Channel State Information, CSI) measurement and Feedback the CSI measurement results. The base station learns the current downlink channel conditions from the feedback CSI measurement results, and selects a corresponding transmission scheme to achieve high-speed transmission of downlink data. Since the LTE system works in the licensed frequency band, the base station has the absolute right to use the licensed frequency band. Therefore, the base station can always receive the CSI measurement result fed back by the terminal and send data to the terminal.
为了满足不断增长的数据业务需求,通信运营商也开始使用资源丰富的非授权频段传输数据,例如:LTE的授权辅助接入(Licensed Assisted Access,LAA)系统。在非授权频段上,为了避免不同系统间的干扰,LAA系统在传输数据前需要先监听信道,进行空闲信道评估(Clear Channel Assessment,CCA),在确保信道空闲的情况下再使用非授权频段进行数据传输。并且,为了保证不同系统使用非授权频段的机会相对公平,避免先占用非授权频段的系统一直占用该非授权频段,通常要求使用非授权频段的系统连续传输数据的时间不能超过最大传输时间。因此,LAA系统在非授权频段上的数据传输也是非连续性的,受到最大传输时间的限制。In order to meet the ever-increasing demand for data services, communication operators also begin to use resource-rich unlicensed frequency bands to transmit data, for example: Licensed Assisted Access (LAA) system of LTE. In the unlicensed frequency band, in order to avoid interference between different systems, the LAA system needs to monitor the channel before transmitting data, and perform Clear Channel Assessment (CCA), and then use the unlicensed frequency band to ensure that the channel is idle. data transmission. In addition, in order to ensure that the opportunities for different systems to use the unlicensed frequency band are relatively fair, and to avoid the system that first occupies the unlicensed frequency band from occupying the unlicensed frequency band, it is generally required that the continuous data transmission time of the system using the unlicensed frequency band cannot exceed the maximum transmission time. Therefore, the data transmission of the LAA system on the unlicensed frequency band is also discontinuous and limited by the maximum transmission time.
若LAA系统采用现有的CSI反馈机制,从基站向终端发送参考信号,到基站接收到终端反馈的CSI测量结果的过程已经占用了此次连续传输时间中的大部分时间,导致基站实际上用于传输业务数据的时间并不多,传输的业务数据量也有限,从而降低了LAA系统利用非授权频段传输业务数据的效率。If the LAA system adopts the existing CSI feedback mechanism, the process from the base station sending the reference signal to the terminal until the base station receiving the CSI measurement result fed back by the terminal has taken up most of the continuous transmission time, so that the base station actually uses Because there is not much time to transmit service data, and the amount of service data to be transmitted is also limited, the efficiency of the LAA system to transmit service data using unlicensed frequency bands is reduced.
发明内容SUMMARY OF THE INVENTION
本申请提供一种数据传输的方法及装置,能够解决基站利用非授权频段传输业务数据效率低的问题。The present application provides a method and device for data transmission, which can solve the problem of low efficiency in transmitting service data by a base station using an unlicensed frequency band.
为达到上述目的,本申请采用如下技术方案:To achieve the above object, the application adopts the following technical solutions:
第一方面,本申请提供一种数据传输的方法,所述方法包括:In a first aspect, the present application provides a method for data transmission, the method comprising:
当基站需向目的终端发送数据时,所述基站获取所述目的终端的用户组标识,其中,同一分组内的终端可以共用一个用户组标识,用户组标识相同的终端可以共用信道状态信息CSI测量结果;When the base station needs to send data to the destination terminal, the base station obtains the user group identifier of the destination terminal, wherein the terminals in the same group can share a user group identifier, and the terminals with the same user group identifier can share the channel state information CSI measurement result;
所述基站从本地获取所述目的终端的用户组标识对应的有效CSI测量结果;obtaining, by the base station locally, a valid CSI measurement result corresponding to the user group identifier of the destination terminal;
所述基站根据所述有效CSI测量结果向所述目的终端发送数据。The base station sends data to the destination terminal according to the effective CSI measurement result.
第二方面,本申请提供一种数据传输的装置,所述装置包括:In a second aspect, the present application provides an apparatus for data transmission, the apparatus comprising:
处理单元,用于获取目的终端的用户组标识,其中,同一分组内的终端可以共用一个用户组标识,用户组标识相同的终端可以共用信道状态信息CSI测量结果;a processing unit, configured to acquire the user group identifier of the destination terminal, wherein the terminals in the same group can share a user group identifier, and the terminals with the same user group identifier can share the channel state information CSI measurement result;
从本地获取所述目的终端的用户组标识对应的有效CSI测量结果;Obtain a valid CSI measurement result corresponding to the user group identifier of the destination terminal locally;
发送单元,用于根据所述处理单元获取的所述有效CSI测量结果向所述目的终端发送数据。A sending unit, configured to send data to the destination terminal according to the effective CSI measurement result obtained by the processing unit.
本申请提供的一种数据传输的方法及装置,当基站需向目的终端发送数据时,根据用户组标识直接调用分组内有效CSI测量结果,并向目的终端发送下行数据。相比较于现有技术中,基站在每一次发送下行数据前都要要求终端进行CSI测量并反馈CSI测量结果。然而,在非授权频段上,CSI测量及反馈的过程耗时较长,从而造成基站利用非授权频段传输业务数据的效率低。而本申请中,基站直接调用同一分组内的有效CSI测量结果,节省了终端进行CSI测量和反馈的时间,因此,在可传输的时间内能够传输更多的业务数据,提高了基站利用非授权频段的传输业务数据的效率。In a method and device for data transmission provided by the present application, when a base station needs to send data to a destination terminal, it directly invokes the effective CSI measurement result in the packet according to the user group identifier, and sends downlink data to the destination terminal. Compared with the prior art, the base station requires the terminal to perform CSI measurement and feed back the CSI measurement result before sending downlink data each time. However, in the unlicensed frequency band, the process of CSI measurement and feedback takes a long time, resulting in low efficiency for the base station to transmit service data using the unlicensed frequency band. In this application, the base station directly calls the valid CSI measurement results in the same group, which saves the time for the terminal to perform CSI measurement and feedback. Therefore, more service data can be transmitted within the transmittable time, which improves the utilization of unauthorized CSI by the base station. The efficiency of transmitting service data in the frequency band.
附图说明Description of drawings
为了更清楚地说明本申请实施例中的技术方案,下面将对实施例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申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其它的附图。In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.
图1为本申请实施例提供的一种通信系统的结构示意图;FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;
图2为本申请实施例提供的一种数据传输的方法流程图;2 is a flowchart of a method for data transmission provided by an embodiment of the present application;
图3为本申请实施例提供的另一种数据传输的方法流程图;3 is a flowchart of another method for data transmission provided by an embodiment of the present application;
图4为本申请实施例提供的又一种数据传输的方法流程图;4 is a flowchart of another method for data transmission provided by an embodiment of the present application;
图5为本申请实施例提供的再一种数据传输的方法流程图;FIG. 5 is a flowchart of still another data transmission method provided by an embodiment of the present application;
图6为本申请实施例提供的一种数据传输装置的结构示意图;6 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present application;
图7为本申请实施例提供的另一种数据传输装置的结构示意图;FIG. 7 is a schematic structural diagram of another data transmission apparatus provided by an embodiment of the present application;
图8为本申请实施例提供的一种数据传输系统的结构示意图。FIG. 8 is a schematic structural diagram of a data transmission system according to an embodiment of the present application.
具体实施方式Detailed ways
下面将结合本申请实施例中的附图,对本申请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申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本申请保护的范围。The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.
本申请实施例提供的一种数据传输方法,可应用于如图1所示通信系统,该通信系统包括基站和至少一个终端,如图2所示,本申请的方法流程如图2所示,具体包括:A data transmission method provided by an embodiment of the present application can be applied to the communication system shown in FIG. 1 , where the communication system includes a base station and at least one terminal, as shown in FIG. 2 , and the method flow of the present application is shown in FIG. 2 , Specifically include:
101、当所述基站需向目的终端发送数据时,所述基站获取所述目的终端的用户组标识。101. When the base station needs to send data to a destination terminal, the base station acquires the user group identifier of the destination terminal.
具体的,在基站获取目的终端的用户组标识之前,基站需预先对服务区域内的终端进行分组,并对每一分组设置一个用户组标识,该用户组标识至少在本基站之内是唯一的,用于区别本基站内其他的用户组,同一分组内的终端共用一个用户组标识。Specifically, before the base station obtains the user group identifier of the destination terminal, the base station needs to group the terminals in the service area in advance, and set a user group identifier for each group, and the user group identifier is unique at least within the base station , which is used to distinguish other user groups in the base station, and terminals in the same group share a user group identifier.
其中,基站可以根据所服务的终端的地理位置,将所服务的终端分为至少两个分组。基站也可以根据自身与所服务中间的路径损耗,将所服务的终端划分为至少两个分组。其中,获取位置的方式可采用全球定位系统(Global Positioning System,GPS)获取,也可采用可观察到达时间差分(Observed Time Difference of arrival,OTDOA)的方法获取,还可采用上行链路到达时间差(Uplink Time Difference of arrival,U-TDOA)的方法获取。本申请对分组的实现方式不做限定。The base station may divide the served terminals into at least two groups according to the geographic locations of the served terminals. The base station may also divide the served terminal into at least two groups according to the path loss between itself and the served terminal. Among them, the way to obtain the location can be obtained by using the Global Positioning System (Global Positioning System, GPS), or can be obtained by using the Observed Time Difference of Arrival (OTDOA) method, or the uplink time difference of arrival ( Uplink Time Difference of arrival, U-TDOA) method. The present application does not limit the implementation manner of grouping.
具体的,当基站对服务区内的终端按进行分组后,每一个分组内的终端具有相同的特性,例如位置相同、或路径损耗相同,在低移动性场景,空间特性和信道质量相对静止的情况下,这些相同的特性表示基站与这些终端之间的信道条件是相似的,在一定时间内是可以共用相同的CSI测量结果的。例如:假设基站服务区内的一个分组内有三个终端,分别是终端A、终端B和终端C,这三个终端的信道条件是相似的。若终端A反馈了CSI测量结果,那么当基站需要向终端B或C发送下行数据时,可以直接使用该CSI测量结果获知信道条件,并选择合适传输方案向终端B或终端C发送下行数据。因此,当基站需要向目的终端发送数据时,可以共用同一分组内的CSI测量结果,需首先获取目的终端的用户组标识。Specifically, after the base station groups the terminals in the service area, the terminals in each group have the same characteristics, such as the same location or the same path loss. In a low mobility scenario, the spatial characteristics and channel quality are relatively static. In this case, these same characteristics indicate that the channel conditions between the base station and these terminals are similar, and the same CSI measurement results can be shared within a certain period of time. For example, it is assumed that there are three terminals in a group in the service area of the base station, namely terminal A, terminal B and terminal C, and the channel conditions of these three terminals are similar. If terminal A feeds back the CSI measurement result, when the base station needs to send downlink data to terminal B or C, it can directly use the CSI measurement result to learn the channel conditions, and select an appropriate transmission scheme to send downlink data to terminal B or terminal C. Therefore, when the base station needs to send data to the target terminal, the CSI measurement results in the same group can be shared, and the user group identifier of the target terminal needs to be obtained first.
102、所述基站从本地获取所述目的终端的用户组标识对应的有效CSI测量结果。102. The base station obtains a valid CSI measurement result corresponding to the user group identifier of the destination terminal locally.
其中,基站本地预先存储有与用户组标识对应的CSI测量结果,并且该CSI测量结果具有时效性,即在预设时间内为有效,超过预设时间为无效。需要注意的是,基站每次向同一分组里的终端发送下行数据时,都会先调用分组里的有效CSI测量结果。当分组里没有有效CSI测量结果时,基站才会向终端发送参考信号,要求终端进行CSI测量,然后接收新的有效CSI测量结果。所以,在每一个分组内,基站本地最多只存储了一个有效CSI测量结果。Wherein, the base station locally pre-stores the CSI measurement result corresponding to the user group identifier, and the CSI measurement result is time-sensitive, that is, valid within a preset time, and invalid beyond the preset time. It should be noted that each time the base station sends downlink data to the terminal in the same group, it will first call the effective CSI measurement result in the group. When there is no valid CSI measurement result in the packet, the base station will send a reference signal to the terminal, requesting the terminal to perform CSI measurement, and then receive a new valid CSI measurement result. Therefore, in each group, the base station locally stores at most one valid CSI measurement result.
103、所述基站根据所述有效CSI测量结果向所述目的终端发送数据。103. The base station sends data to the destination terminal according to the effective CSI measurement result.
具体的,基站根据获取到的有效的CSI测量结果以及目的终端的接收能力等因素,选择合适的调制解调编码方式、资源分配类型以及具体的传输方案,向目的终端发送数据。Specifically, the base station selects an appropriate modulation, demodulation and coding mode, resource allocation type and specific transmission scheme according to the acquired valid CSI measurement results and the receiving capability of the destination terminal, and sends data to the destination terminal.
本申请提供的一种数据传输的方法,当基站需向目的终端发送数据时,根据用户组标识直接调用分组内有效CSI测量结果,并向目的终端发送下行数据。相比较于现有技术中,基站在每一次发送下行数据前都要要求终端进行CSI测量并反馈CSI测量结果。然而,在非授权频段上,CSI测量及反馈的过程耗时较长,从而造成基站利用非授权频段传输业务数据的效率低。而本申请中,基站直接调用同一分组内的有效CSI测量结果,节省了终端进行CSI测量和反馈的时间,因此,在可传输的时间内能够传输更多的业务数据,提高了基站利用非授权频段的传输业务数据的效率。In a data transmission method provided by the present application, when a base station needs to send data to a destination terminal, it directly invokes the effective CSI measurement result in the packet according to the user group identifier, and sends downlink data to the destination terminal. Compared with the prior art, the base station requires the terminal to perform CSI measurement and feed back the CSI measurement result before sending downlink data each time. However, in the unlicensed frequency band, the process of CSI measurement and feedback takes a long time, resulting in low efficiency for the base station to transmit service data using the unlicensed frequency band. In this application, the base station directly calls the valid CSI measurement results in the same group, which saves the time for the terminal to perform CSI measurement and feedback. Therefore, more service data can be transmitted within the transmittable time, which improves the utilization of unauthorized CSI by the base station. The efficiency of transmitting service data in the frequency band.
进一步的,在图2的基础上,考虑到本申请实施例提供的一种数据传输方法在分组之后还需为每一个分组预先存储CSI测量结果,如图3所示,在步骤102之前,该方法还包括:Further, on the basis of FIG. 2 , considering that a data transmission method provided by this embodiment of the present application needs to pre-store CSI measurement results for each group after grouping, as shown in FIG. 3 , before
201、所述基站分别向每个分组内指定数量的终端发送第一参考信号。201. The base station sends a first reference signal to a specified number of terminals in each group respectively.
其中,所述第一参考信号用于指示所述每个分组内指定数量的终端进行CSI测量。Wherein, the first reference signal is used to instruct a specified number of terminals in each group to perform CSI measurement.
具体的,在分组后,基站从每一个分组中选择指定数量的终端,并向选择的每一个终端发送参考信号,要求这些终端进行CSI测量并反馈CSI测量结果。其中,指定数量的设置可以根据终端的地理位置,或者基站到终端的路径损耗等确定。Specifically, after grouping, the base station selects a specified number of terminals from each group, and sends a reference signal to each selected terminal, requiring these terminals to perform CSI measurement and feed back the CSI measurement results. The setting of the specified number may be determined according to the geographical location of the terminal, or the path loss from the base station to the terminal.
示例性的,假设基站将服务区内的终端划分为3个分组,分别命名为第一分组、第二分组和第三分组。其中,第一分组内有终端A和终端B,第二分组内有终端C,第三分组内有终端D和终端E。以指定数量是1个为例,基站从第一分组、第二分组和第三分组中分别选择一个终端,分别为终端A、终端C和终端E,并向这三个终端发送参考信号,要求这三个终端进行CSI测量。Exemplarily, it is assumed that the base station divides the terminals in the service area into 3 groups, which are named as the first group, the second group and the third group respectively. The first group includes terminal A and terminal B, the second group includes terminal C, and the third group includes terminal D and terminal E. Taking the specified number of 1 as an example, the base station selects one terminal from the first group, the second group, and the third group, respectively terminal A, terminal C, and terminal E, and sends reference signals to these three terminals, requesting The three terminals perform CSI measurements.
202、所述基站分别接收每个分组内的终端反馈的CSI测量结果。202. The base station respectively receives the CSI measurement results fed back by the terminals in each group.
示例性的,结合步骤201的例子,基站分别接收终端A、终端C和终端E反馈的3个CSI测量结果。Exemplarily, with reference to the example of
203、所述基站分别将接收到的每个CSI测量结果与发送各CSI测量结果的终端的用户组标识对应存储。203. The base station stores each received CSI measurement result in correspondence with the user group identifier of the terminal that sends each CSI measurement result.
具体的,基站在接收到所选择的终端反馈的CSI测量结果时,获取该终端的用户组标识,将该用户组标识和该CSI测量结果建立对应关系并在存储在本地。这样,基站为每一个分组都预先存储了一个CSI测量结果。Specifically, when receiving the CSI measurement result fed back by the selected terminal, the base station acquires the user group identifier of the terminal, establishes a corresponding relationship between the user group identifier and the CSI measurement result, and stores it locally. In this way, the base station prestores a CSI measurement result for each group.
示例性的,结合步骤201和202的例子,基站将终端A反馈的CSI测量结果与第一分组的用户组标识对应存储,将终端C反馈的CSI测量结果与第二分组的用户组标识对应存储,将终端E反馈的CSI测量结果与第三分组的用户组标识对应存储。Exemplarily, in combination with the examples of
204、当有CSI测量结果的存在时长超过有效生存时限时,所述基站将所述CSI测量结果设置成无效。204. When the existence duration of the CSI measurement result exceeds the valid survival time limit, the base station sets the CSI measurement result to be invalid.
具体的,由于信道条件具有时变性的特点,因此基站需要根据系统的特性和信道的变化情况为存储的CSI测量结果设置有效生存时限。Specifically, since channel conditions are time-varying, the base station needs to set an effective lifetime for the stored CSI measurement results according to system characteristics and channel changes.
基站在存储CSI测量结果的同时,将该CSI测量结果设置为有效,并且启动计数器,设置计数器的初始值为零。在每经过一个传输时间间隔(Transmission Time Interval,TTI),计数器的数值自动加1,当计数器的数值超过预设值时,将该CSI测量结果设置为无效。其中,预设值为有效生存时限内包含的传输时间间隔的个数,因此,当计数器的数值超过预设值时,CSI测量结果的存在时长也超过了有效生存时限,此时需将该CSI测量结果设置为无效。While storing the CSI measurement result, the base station sets the CSI measurement result to be valid, starts the counter, and sets the initial value of the counter to zero. Every time a transmission time interval (Transmission Time Interval, TTI) passes, the value of the counter is automatically incremented by 1, and when the value of the counter exceeds the preset value, the CSI measurement result is set as invalid. Among them, the preset value is the number of transmission time intervals included in the effective survival time limit. Therefore, when the value of the counter exceeds the preset value, the existence time of the CSI measurement result also exceeds the effective survival time limit. The measurement result is set to invalid.
在图2的基础上,可能存在基站没有获取到有效CSI测量结果的情况,此时基站需通过其他方式来获取CSI测量结果,所以在本申请实施例提供的另一种可能的实现方式中,如图4所示,在步骤103之前,还可以执行步骤301至302:On the basis of FIG. 2 , there may be a situation where the base station does not obtain valid CSI measurement results. In this case, the base station needs to obtain the CSI measurement results in other ways. Therefore, in another possible implementation provided by the embodiment of the present application, As shown in FIG. 4, before
301、当所述基站没有获取到有效CSI测量结果时,所述基站使用非授权频段向所述目的终端发送第二参考信号。301. When the base station does not obtain a valid CSI measurement result, the base station sends a second reference signal to the target terminal by using an unlicensed frequency band.
其中,所述第二参考信号用于指示所述目的终端进行CSI测量。Wherein, the second reference signal is used to instruct the target terminal to perform CSI measurement.
具体的,基站没有获取到有效CSI测量结果具体包括有效CSI测量结果失效了,或者目的终端不属于现有的任何分组时等情况,此时,基站需要向目的终端向发送第二参考信号,要求目的终端进行CSI测量。Specifically, when the base station does not obtain valid CSI measurement results, it includes the fact that the valid CSI measurement results are invalid, or the destination terminal does not belong to any existing group, etc. At this time, the base station needs to send a second reference signal to the destination terminal, requesting The destination terminal performs CSI measurement.
302、所述基站从授权频段上接收所述目的终端反馈的CSI测量结果。302. The base station receives the CSI measurement result fed back by the target terminal from the licensed frequency band.
具体的,在目的终端接收到基站发送的第二参考信号后,目的终端进行CSI测量,并将CSI测量结果发送给基站,其中该CSI测量结果中可以携带第二参考信号所使用的非授权频段的信息。在基站接收到目的终端发送的CSI测量结果后,根据CSI测量结果中携带的非授权频段的信息可以获知该CSI测量结果对应的参考信息,并进一步根据该第二参考信号和该CSI测量结果获知当前下行链路的信道条件,选择相应的传输方案向目的终端发送下行数据。Specifically, after the destination terminal receives the second reference signal sent by the base station, the destination terminal performs CSI measurement, and sends the CSI measurement result to the base station, where the CSI measurement result may carry the unlicensed frequency band used by the second reference signal Information. After receiving the CSI measurement result sent by the target terminal, the base station can obtain the reference information corresponding to the CSI measurement result according to the information of the unlicensed frequency band carried in the CSI measurement result, and further obtain the reference information according to the second reference signal and the CSI measurement result. Under the current channel conditions of the downlink, select a corresponding transmission scheme to send downlink data to the destination terminal.
本申请实施例提供的数据传输方法,相比较于现有技术中,基站通过非授权频段接收CSI测量结果,由于在非授权频段上的一次连续的数据传输受到最大传输时间的限制,很难保证基站能够接收到终端反馈的CSI测量结果,从而可能浪费本地目的终端进行的CSI测量和CSI测量结果反馈的机会,造成了网络资源的浪费。而在本申请中,由于是通过授权频段来接收CSI测量结果的,由于基站拥有授权频段的绝对使用权,基站能够保证接收到CSI测量结果的,提高了数据传输的效率。Compared with the data transmission method provided by the embodiments of the present application, the base station receives the CSI measurement result through the unlicensed frequency band. Since a continuous data transmission in the unlicensed frequency band is limited by the maximum transmission time, it is difficult to guarantee The base station can receive the CSI measurement result fed back by the terminal, which may waste the opportunity of CSI measurement performed by the local destination terminal and feedback of the CSI measurement result, resulting in a waste of network resources. In the present application, since the CSI measurement result is received through the licensed frequency band, and since the base station has the absolute right to use the licensed frequency band, the base station can guarantee to receive the CSI measurement result, which improves the efficiency of data transmission.
在本申请实施例的一种应用场景中,当本申请实施例提供的数据传输方法运用于LAA系统中时,如图5所示,该方法具体包括:In an application scenario of the embodiment of the present application, when the data transmission method provided by the embodiment of the present application is applied to the LAA system, as shown in FIG. 5 , the method specifically includes:
401、基站对服务区域内的终端进行分组,并为每一分组设置一个用户组标识。401. The base station groups the terminals in the service area, and sets a user group identifier for each group.
本步骤的具体实现方式可参考步骤101。For the specific implementation of this step, reference may be made to step 101 .
402、基站进行CCA。402. The base station performs CCA.
具体的,由于LAA系统工作在非授权频段,为了避免不同系统间的干扰,LAA系统在传输数据前需要先监听信道,进行CCA,CCA通过检测信号能量并与阈值相比较,根据比较结果来判断信道的忙闲状态,在确保信道空闲的情况下再进行数据传输。CCA的具体实现参考现有技术,在此,不重复赘述。Specifically, since the LAA system works in an unlicensed frequency band, in order to avoid interference between different systems, the LAA system needs to monitor the channel before transmitting data, and perform CCA. CCA detects the signal energy and compares it with the threshold, and judges according to the comparison result. The busy and idle state of the channel, and data transmission is performed when the channel is guaranteed to be idle. The specific implementation of the CCA refers to the prior art, and details are not repeated here.
403、基站检测到信道空闲后,向第一终端发送参考信号。403. After detecting that the channel is idle, the base station sends a reference signal to the first terminal.
其中,第一终端为工作在该基站服务区域内的任一终端。Wherein, the first terminal is any terminal operating in the service area of the base station.
具体的,如果基站检测到信道空闲,则占用信道资源。在占用信道资源后,使用非授权频段向第一终端发送参考信号。Specifically, if the base station detects that the channel is idle, it occupies channel resources. After occupying the channel resource, the reference signal is sent to the first terminal by using the unlicensed frequency band.
404、第一终端根据接收到的参考信号进行CSI测量。404. The first terminal performs CSI measurement according to the received reference signal.
405、第一终端向该基站发送CSI测量结果。405. The first terminal sends the CSI measurement result to the base station.
具体的,由于从基站发送参考信号到第一终端完成CSI测量的过程已耗时较长,为了保证第一终端发送的CSI测量结果能被基站成功接收,第一终端可使用授权频段发送CSI测量结果。Specifically, since the process from the base station sending the reference signal to the first terminal completing the CSI measurement takes a long time, in order to ensure that the CSI measurement result sent by the first terminal can be successfully received by the base station, the first terminal can use the licensed frequency band to send the CSI measurement result.
406、基站接收到CSI测量结果后,将CSI测量结果和第一终端的用户组标识对应存储在本地,并启动计数器。406. After receiving the CSI measurement result, the base station stores the CSI measurement result and the user group identifier of the first terminal correspondingly locally, and starts a counter.
本步骤的具体实现方式可参考步骤201-203。For the specific implementation of this step, reference may be made to steps 201-203.
407、基站根据接收到的CSI测量结果向第一终端发送下行数据。407. The base station sends downlink data to the first terminal according to the received CSI measurement result.
408、当基站需向第二终端发送下行数据时,基站判断第二终端的用户组标识与第一终端的用户组标识是否相同。408. When the base station needs to send downlink data to the second terminal, the base station determines whether the user group identifier of the second terminal is the same as the user group identifier of the first terminal.
其中,第二终端为工作在该基站服务区域内除第一终端外的另一终端。Wherein, the second terminal is another terminal other than the first terminal operating in the service area of the base station.
具体的,当第二终端的用户组标识与第一终端的用户组标识不同时,基站向第二终端发送参考信息,要求第二终端进行CSI测量并反馈CSI测量结果。Specifically, when the user group identifier of the second terminal is different from the user group identifier of the first terminal, the base station sends reference information to the second terminal, requesting the second terminal to perform CSI measurement and feed back the CSI measurement result.
409、当第二终端的用户组标识和第一终端的用户组标识相同时,基站判断第一终端的CSI测量结果是否有效。409. When the user group identifier of the second terminal is the same as the user group identifier of the first terminal, the base station determines whether the CSI measurement result of the first terminal is valid.
具体的,基站通过判断计数器的数值是否超过为第一终端的CSI测量结果设置的有效生存时限,若未超过,则CSI测量结果有效,否则,CSI测量结果无效。Specifically, the base station judges whether the value of the counter exceeds the valid lifetime set for the CSI measurement result of the first terminal, if not, the CSI measurement result is valid; otherwise, the CSI measurement result is invalid.
其中,当第一终端的CSI测量结果无效时,基站向第二终端发送参考信号,要求第二终端进行CSI测量并反馈CSI测量结果,基站再根据接收到的CSI测量结果向第二终端发送数据。Wherein, when the CSI measurement result of the first terminal is invalid, the base station sends a reference signal to the second terminal, requesting the second terminal to perform CSI measurement and feed back the CSI measurement result, and the base station then sends data to the second terminal according to the received CSI measurement result .
410、当第一终端的CSI测量结果有效时,基站调用第一终端的CSI测量结果向第二终端发送下行数据。410. When the CSI measurement result of the first terminal is valid, the base station invokes the CSI measurement result of the first terminal to send downlink data to the second terminal.
本发明实施例还提供一种数据传输的装置60,如图6所示,所述装置包括:An embodiment of the present invention further provides an
处理单元61,用于获取目的终端的用户组标识,其中,同一分组内的终端可共用相同的信道状态信息CSI测量结果;从本地获取所述目的终端的用户组标识对应的有效CSI测量结果.The
发送单元62,用于根据所述处理单元61获取的所述有效CSI测量结果向所述目的终端发送数据。The sending
本申请提供的一种数据传输的装置,当基站需向目的终端发送数据时,根据用户组标识直接调用分组内有效CSI测量结果,并向目的终端发送下行数据。相比较于现有技术中,基站在每一次发送下行数据前都要要求终端进行CSI测量并反馈CSI测量结果。然而,在非授权频段上,CSI测量及反馈的过程耗时较长,从而造成基站利用非授权频段传输业务数据的效率低。而本申请中,基站直接调用同一分组内的有效CSI测量结果,节省了终端进行CSI测量和反馈的时间,因此,在可传输的时间内能够传输更多的业务数据,提高了基站利用非授权频段的传输业务数据的效率。In a data transmission device provided by the present application, when a base station needs to send data to a destination terminal, it directly invokes the effective CSI measurement result in the packet according to the user group identifier, and sends downlink data to the destination terminal. Compared with the prior art, the base station requires the terminal to perform CSI measurement and feed back the CSI measurement result before sending downlink data each time. However, in the unlicensed frequency band, the process of CSI measurement and feedback takes a long time, resulting in low efficiency for the base station to transmit service data using the unlicensed frequency band. In this application, the base station directly calls the valid CSI measurement results in the same group, which saves the time for the terminal to perform CSI measurement and feedback. Therefore, more service data can be transmitted within the transmittable time, which improves the utilization of unauthorized CSI by the base station. The efficiency of transmitting service data in the frequency band.
进一步的,所述处理单元61,还用于根据基站所服务的终端的地理位置,将所服务的终端划分为至少两个分组;或者,根据基站与所服务的终端之间的路径损耗,将所服务的终端划分为至少两个分组。Further, the
进一步的,本申请实施例还提供了一种数据传输装置70,如图7所示,所述装置,70还包括接收单元71和存储单元72。Further, an embodiment of the present application further provides a
所述发送单元62,还用于分别向每个分组内指定数量的终端发送第一参考信号,所述第一参考信号用于指示所述每个分组内指定数量的终端进行CSI测量。The sending
所述接收单元71,用于分别接收每个分组内的终端反馈的CSI测量结果。The receiving
所述存储单元72,用于分别将所述接收单元71接收到的每个CSI测量结果与发送各CSI测量结果的终端的用户组标识对应存储。The
所述处理单元61,还用于当有CSI测量结果的存在时长超过有效生存时限时,所述基站将所述CSI测量结果设置成无效。The
进一步的,所述发送单元62,还用于使用非授权频段向所述目的终端发送第二参考信号,所述第二参考信号用于指示所述目的终端进行CSI测量。Further, the sending
所述接收单元71,还用于从授权频段上接收所述目的终端反馈的CSI测量结果。The receiving
进一步的,所述处理单元61,还用于在所述存储单元72存储所述CSI测量结果的同时,启动计数器;每经过一个传输时间间隔TTI,所述计数器的数值自动加1;当所述计数器的数值超过预设值时,将所述CSI测量结果设置成无效。Further, the
如图8所示,本发明实施例提供一种数据传输的终端,包括:处理器801、存储器802、收发器803以及总线804,所述处理器801、存储器802和收发器803通过所述总线804互相通信。其中,所述存储器802用于存储多个指令以实现本发明提供的数据传输,所述处理器801执行所述多个指令以实现当基站需向目的终端发送数据时,所述基站获取所述目的终端的用户组标识,所述基站从本地获取所述目的终端的用户组标识对应的有效CSI测量结果;所述基站根据所述有效CSI测量结果向所述目的终端发送数据。其中,同一分组内的终端可共用相同的信道状态信息CSI测量结果。As shown in FIG. 8, an embodiment of the present invention provides a terminal for data transmission, including: a
进一步的,所述处理器801还用于所述基站根据所服务的终端的地理位置,将所服务的终端划分为至少两个分组;或者,所述基站根据自身与所服务的终端之间的路径损耗,将所服务的终端划分为至少两个分组。Further, the
进一步的,所述处理器801还用于所述基站分别向每个分组内指定数量的终端发送第一参考信号,所述第一参考信号用于指示所述每个分组内指定数量的终端进行CSI测量;所述基站分别接收每个分组内的终端反馈的CSI测量结果;当述基站分别将接收到的每个CSI测量结果与发送各CSI测量结果的终端的用户组标识对应存储;当有CSI测量结果的存在时长超过有效生存时限时,所述基站将所述CSI测量结果设置成无效。Further, the
进一步的,所述处理器801还用于当所述基站没有获取到有效CSI测量结果时,所述基站使用非授权频段向所述目的终端发送第二参考信号,所述第二参考信号用于指示所述目的终端进行CSI测量;所述基站从授权频段上接收所述目的终端反馈的CSI测量结果。Further, the
进一步的,所述处理器801还用于所述基站在存储所述CSI测量结果的同时,启动计数器;每经过一个传输时间间隔TTI,所述计数器的数值自动加1;当所述计数器的数值超过预设值时,所述基站将所述CSI测量结果设置成无效。Further, the
其中,本发明实施例所述的处理器801可以是一个处理器,也可以是多个处理元件的统称。例如,该处理器801可以是中央处理器(Central Processing Unit,简称CPU),也可以是特定集成电路(Application Specific Integrated Circuit,简称ASIC),或者是被配置成实施本发明实施例的一个或多个集成电路,例如:一个或多个微处理器(digitalsignal processor,简称DSP),或,一个或者多个现场可编程门阵列(Field ProgrammableGate Array,简称FPGA)。The
存储器802可以是一个存储装置,也可以是多个存储元件的统称,且用于存储可执行程序代码等。且存储器802可以包括随机存储器(RAM),也可以包括非易失性存储器(non-volatile memory),例如磁盘存储器,闪存(Flash)等。The
总线804可以是工业标准体系结构(Industry Standard Architecture,ISA)总线、外部设备互连(Peripheral Component,PCI)总线或扩展工业标准体系结构(ExtendedIndustry Standard Architecture,EISA)总线等。该总线804可以分为地址总线、数据总线、控制总线等。为便于表示,图8中仅用一条粗线表示,但并不表示仅有一根总线或一种类型的总线。The
本说明书中的各个实施例均采用递进的方式描述,各个实施例之间相同相似的部分互相参见即可,每个实施例重点说明的都是与其他实施例的不同之The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments may be referred to each other, and each embodiment focuses on the differences from other embodiments.
处。尤其,对于装置实施例而言,由于其基本相似于方法实施例,所以描述得比较简单,相关之处参见方法实施例的部分说明即可。place. In particular, for the apparatus embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for related parts.
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,ROM)或随机存储记忆体(Random AccessMemory,RAM)等。Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-readable storage medium, and the program is During execution, it may include the processes of the embodiments of the above-mentioned methods. The storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random Access Memory, RAM) or the like.
以上所述,仅为本发明的具体实施方式,但本发明的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本发明揭露的技术范围内,可轻易想到的变化或替换,都应涵盖在本发明的保护范围之内。因此,本发明的保护范围应该以权利要求的保护范围为准。The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or substitutions. All should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
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