WO2017148205A1 - Data transmission method and apparatus - Google Patents

Abstract

Provided are a data transmission method and apparatus. The method comprises: determining a dedicated slot on an unlicensed carrier and a shared slot on the unlicensed carrier which are allocated by a base station, wherein the dedicated slot is used for a user equipment (UE) to perform device-to-device (D2D) data transmission, and the shared slot is used for two or more UEs, including the UE, to perform D2D data transmission; and using the dedicated slot and the shared slot to perform D2D data transmission. By means of the present invention, the problem in the related art that an unlicensed frequency band cannot be used to perform D2D communication is solved, thereby achieving the effect of using an unlicensed frequency band to perform D2D communication so as to improve the resource utilization rate.

Description

数据传输方法及装置Data transmission method and device 技术领域Technical field

本发明涉及通信领域，具体而言，涉及一种数据传输方法及装置。The present invention relates to the field of communications, and in particular to a data transmission method and apparatus.

背景技术Background technique

设备到设备(Device-to-device，简称为D2D)通信是一种近距离用户直接进行端到端的通信方式，设备间直接通信而不通过基站，减小了网络传输的成本和时延，能够提高数据的传输效率。随着多媒体技术和交互技术的发展，越来越多的业务需要设备之间进行低时延、高速率的数据交互，例如用户之间的多媒体大数据传输、即时互动交互游戏等。在这种环境下，D2D通信方式具有得天独厚的优势，用户之间直接进行数据交互而不通过基站，基站只需要宏观的控制设备通信。Device-to-device (D2D) communication is a direct-to-end communication method for close-range users. Direct communication between devices does not pass through the base station, which reduces the cost and delay of network transmission. Improve the efficiency of data transmission. With the development of multimedia technology and interactive technology, more and more services require low-latency, high-speed data interaction between devices, such as multimedia big data transmission between users, and instant interactive interactive games. In this environment, the D2D communication method has the unique advantage that the data is directly exchanged between users without passing through the base station, and the base station only needs macro control device communication.

随着D2D技术的不断发展，相关利用D2D通信进行传输的专利也层出不穷。例如：能够实现蜂窝网络中设备到设备(D2D)通信的装置和方法；传输方法和通信设备；D2D通信的方法及设备；终端直通的方法、终端直通终端和基站等，这些专利主要针对的都是D2D通信在授权频段上的传输。With the continuous development of D2D technology, patents related to transmission using D2D communication are also emerging. For example, a device and method capable of implementing device-to-device (D2D) communication in a cellular network; a transmission method and a communication device; a method and device for D2D communication; a method for directly connecting a terminal, a terminal through terminal, and a base station, etc. It is the transmission of D2D communication on the licensed frequency band.

下面对相关技术中的D2D通信进行说明：The following describes the D2D communication in the related art:

相关技术一Related technology one

相关技术一提供了一种利用D2D通信发送信息的装置和方法。在允许存在D2D簇的小区当中，可以将资源分配给D2D操作。网络经由演进型基站(evolved Node B，简称为eNB)通知用户设备(User Equipment，简称为UE)为D2D操作预留了资源的集合。此后，特定eNB小区内的D2D通信就可以使用这些预留的资源块，同时常规的长期演进(Long Term Evolution，简称为LTE)业务量与D2D传输之间也可以共享频谱资源。基站可以根据条件通过定义设备到设备的空白子区域，来避免其他用户设 备带来的干扰。该方案的应用场景如图1所示，图1是相关技术一中的应用场景示意图。Related Art One provides an apparatus and method for transmitting information using D2D communication. Among the cells that are allowed to have D2D clusters, resources can be allocated to D2D operations. The network informs the user equipment (User Equipment, abbreviated as UE) that the set of resources reserved for the D2D operation. Thereafter, the reserved resource blocks can be used for the D2D communication in the specific eNB cell, and the conventional Long Term Evolution (LTE) traffic and the D2D transmission can also share the spectrum resources. The base station can avoid other user settings by defining a blank sub-area of the device to the device according to the conditions. The interference caused by the preparation. The application scenario of the solution is shown in FIG. 1 . FIG. 1 is a schematic diagram of an application scenario in the related art.

下面对相关技术一中的实施例进行说明，该实施例包括如下步骤：The following describes an embodiment in the related art 1. The embodiment includes the following steps:

Step1：eNB对帧资源进行分配；Step 1: The eNB allocates frame resources.

eNB确定能够用于D2D通信的帧资源，并且配置D2D区域，eNB进一步在D2D区域内分配D2D发现区；The eNB determines a frame resource that can be used for D2D communication, and configures a D2D area, and the eNB further allocates a D2D discovery area in the D2D area;

Step2：eNB将D2D区域配置情况通知给UE；Step 2: The eNB notifies the UE of the D2D area configuration.

D2D业务既可以在D2D业务预留的资源块中进行传输，也可以在与传统的LTE资源相同的资源块上传输。对应的帧结构如图2所示，图2是相关技术一中的帧结构示意图。The D2D service can be transmitted in the resource block reserved by the D2D service or on the same resource block as the traditional LTE resource. The corresponding frame structure is shown in FIG. 2, and FIG. 2 is a schematic diagram of a frame structure in the related art.

由以上分析可知：该技术方案通过eNB分配帧资源来完成D2D传输。该技术并未考虑到利用非授权频段来降低传输时延。It can be seen from the above analysis that the technical solution completes D2D transmission by allocating frame resources by the eNB. This technique does not take into account the use of unlicensed bands to reduce transmission delay.

由此可知，相关技术一中的实施例只是针对授权频段的帧结构设计，不能适用于非授权频段；It can be seen that the embodiment in the related art 1 is only for the frame structure design of the licensed frequency band, and cannot be applied to the unlicensed frequency band;

D2D通信仍然有可能与大量其他的LTE业务产生竞争，造成资源利用率的下降。D2D communication is still likely to compete with a large number of other LTE services, resulting in a decline in resource utilization.

相关技术二Related technology two

相关技术二提供了一种用于D2D通信的方法及设备，以提高频谱利用率和数据传输速率。该方法通过将D2D通信复用到高级长期演进(Long-Term Evolution Advance，简称为LTE-A)的上行频谱资源(即UE到eNB的链路)，避免对现有网络终端的干扰。其中关于D2D的通信方法，是将需要发送的控制信息和数据信息承载于物理资源块当中，在设备间D2D通信发送上述物理资源块到目标用户。 Related Art 2 provides a method and apparatus for D2D communication to improve spectrum utilization and data transmission rate. The method avoids interference to existing network terminals by multiplexing the D2D communication to the uplink spectrum resource of the Long-Term Evolution Advance (LTE-A) (ie, the UE-to-eNB link). The communication method for D2D is to carry control information and data information to be transmitted in a physical resource block, and to transmit the physical resource block to the target user by D2D communication between devices.

下面对相关技术二中的实施例进行说明，该实施例包括如下步骤：The following describes an embodiment in the related art 2. The embodiment includes the following steps:

Step1：将需要发送的控制信息和数据信息承载于物理资源块当中，对 于物理资源块的划分主要有如下两种方法。Step1: Carry the control information and data information that need to be sent in the physical resource block, There are two main methods for dividing physical resource blocks.

方法一：物理资源块在时域上包含M个正交频分复用(Orthogonal Frequency Division Multiplexing，简称为OFDM)符号，频域上包含N个子载波，一个OFDM符号和一个子载波所限定的时间频率资源为资源单元(Resource Element，简称为RE)，其中M和N为整数；控制信息包括调制编码方案(Modulation and Coding Scheme，简称为MCS)、冗余版本(Redundancy Version，简称为RV)和新数据指示(New Data Indication，简称为NDI)三者中的至少一项，将其映射在物理资源块的高频部分；数据信息映射在除控制信息映射的RE之外的空白RE上；具体映射可参考图3，图3是相关技术二中的物理资源配置示意图一。Method 1: The physical resource block includes M orthogonal frequency division multiplexing (OFDM) symbols in the time domain, and the frequency domain includes N subcarriers, one OFDM symbol and one subcarrier defined time. The frequency resource is a Resource Element (RE), where M and N are integers; the control information includes a Modulation and Coding Scheme (MCS), a Redundancy Version (RV), and At least one of New Data Indication (NDI) is mapped to a high frequency portion of the physical resource block; the data information is mapped to a blank RE other than the RE of the control information mapping; For the mapping, reference may be made to FIG. 3, which is a schematic diagram of physical resource configuration in the second technique.

方法二：物理资源块在时间域上包含M个正交频分复用OFDM符号，在频率域上包含N个子载波，一个OFDM符号和一个子载波所限定的时间频率资源表示为资源单元RE，其中M和N为整数；控制信息包括信道质量指示CQI和预编码矩阵指示PMI两者中的至少一项，控制信息映射在物理资源块中高频部分的RE上，数据信息映射在物理资源块中除了控制信息映射的RE的空白RE之上；具体映射可参考图4，图4是相关技术二中的物理资源配置示意图二。Method 2: The physical resource block includes M orthogonal frequency division multiplexing OFDM symbols in a time domain, and includes N subcarriers in a frequency domain, and a time frequency resource defined by one OFDM symbol and one subcarrier is represented as a resource unit RE. Wherein M and N are integers; the control information includes at least one of a channel quality indicator CQI and a precoding matrix indicator PMI, the control information is mapped on the RE of the high frequency part of the physical resource block, and the data information is mapped in the physical resource block. In addition to the blank RE of the RE that controls the information mapping, the specific mapping may refer to FIG. 4, which is a schematic diagram 2 of the physical resource configuration in the related art 2.

Step2：在设备间D2D通信链路中发送物理资源块至目标用户设备。Step 2: Send a physical resource block to the target user equipment in the inter-device D2D communication link.

相关技术二的实施例中的该资源配置方法也只能用于授权频段，不能用于非授权频段。The resource configuration method in the embodiment of the related art 2 can also be used only for the licensed frequency band, and cannot be used for the unlicensed frequency band.

针对相关技术中存在的无法利用非授权频段进行D2D通信的问题，目前尚未提出有效的解决方案。In view of the problem of the inability to utilize the unlicensed frequency band for D2D communication in the related art, an effective solution has not been proposed yet.

发明内容Summary of the invention

本发明提供了一种数据传输方法及装置，以至少解决相关技术中存在的无法利用非授权频段进行D2D通信的问题。The present invention provides a data transmission method and apparatus to solve at least the problem of D2D communication that cannot be utilized in an unlicensed frequency band in the related art.

根据本发明的一个方面，提供了一种数据传输方法，包括：确定基站 分配的非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；利用所述专用时隙和所述共享时隙进行所述D2D数据传输。According to an aspect of the present invention, a data transmission method is provided, including: determining a base station a dedicated time slot on the assigned unlicensed carrier and a shared time slot on the unlicensed carrier, wherein the dedicated time slot is used by the user equipment UE for device to device D2D data transmission, the shared time slot being used for The D2D data transmission is performed by two or more UEs, including the UE, and the D2D data transmission is performed by using the dedicated time slot and the shared time slot.

可选地，确定所述基站分配的所述非授权载波上的所述专用时隙和所述非授权载波上的所述共享时隙包括：向所述基站发送请求进行上行调度的请求消息；确定所述基站根据所述请求消息分配的上行资源；利用所述上行资源将用于控制所述D2D数据传输的控制信息发送给所述基站；确定所述基站根据所述控制信息分配的所述专用时隙和所述共享时隙。Optionally, determining the dedicated time slot on the unlicensed carrier allocated by the base station and the shared time slot on the unlicensed carrier include: sending a request message requesting uplink scheduling to the base station; Determining an uplink resource allocated by the base station according to the request message; transmitting, by using the uplink resource, control information for controlling the D2D data transmission to the base station; and determining, by the base station, according to the control information Dedicated time slot and the shared time slot.

可选地，利用所述上行资源将用于控制所述D2D数据传输的所述控制信息发送给所述基站包括：利用所述上行资源通过设备到设备传输报告D2D TR将所述控制信息发送给所述基站，其中，所述D2D TR为根据上行共享信道UL-SCH中逻辑信道标识LCID保留的可扩展字段确定的D2D数据传输报告指令，所述报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。Optionally, sending, by using the uplink resource, the control information used to control the D2D data transmission to the base station, by using the uplink resource, sending the control information to the device by using a device-to-device transmission report D2D TR The base station, wherein the D2D TR is a D2D data transmission report instruction determined according to an expandable field reserved by a logical channel identifier LCID in an uplink shared channel UL-SCH, where the report instruction includes a data type, a priority, and a sender number. , Receiver number, data, and loop check digit.

可选地，利用所述专用时隙和所述共享时隙进行所述D2D数据传输包括：利用所述专用时隙传输所述D2D数据；当利用所述专用时隙未传输完所述D2D数据时，利用所述共享时隙传输剩余的未传输完的所述D2D数据。Optionally, performing the D2D data transmission by using the dedicated time slot and the shared time slot comprises: transmitting the D2D data by using the dedicated time slot; and not transmitting the D2D data when using the dedicated time slot And transmitting the remaining untransmitted D2D data by using the shared time slot.

可选地，利用所述专用时隙传输所述D2D数据包括：在所述专用时隙上进行空闲信道评估CCA检测；当检测结果为所述专用时隙为空闲时，利用所述专用时隙传输所述D2D数据。Optionally, transmitting the D2D data by using the dedicated time slot comprises: performing idle channel estimation CCA detection on the dedicated time slot; and using the dedicated time slot when the detection result is that the dedicated time slot is idle Transmitting the D2D data.

可选地，利用所述共享时隙传输剩余的未传输完的所述D2D数据包括：在所述共享时隙上进行空闲信道评估CCA检测；当检测结果为所述共享时隙为空闲时，利用所述共享时隙传输剩余的未传输完的所述D2D数据；当检测结果为所述共享时隙为忙时，等待预定时间后再次进行CCA检测，并在检测到所述共享时隙为空闲时，利用所述共享时隙传输剩余的 未传输完的所述D2D数据。Optionally, transmitting the remaining untransmitted D2D data by using the shared time slot comprises: performing idle channel estimation CCA detection on the shared time slot; and when the detection result is that the shared time slot is idle, Transmitting the remaining untransmitted D2D data by using the shared time slot; when the detection result is that the shared time slot is busy, waiting for a predetermined time, performing CCA detection again, and detecting that the shared time slot is When idle, use the shared time slot to transmit the remaining The D2D data that has not been transmitted.

可选地，所述专用时隙和/或所述共享时隙所在的通信帧的最小单位为小资源块MRB，其中，一个MRB在时域上包含14个正交频分复用OFDM符号，时域大小为两个时隙；在频域上包含12个连续的子载波，频域大小为180kHz。Optionally, the smallest unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a small resource block MRB, where one MRB includes 14 orthogonal frequency division multiplexing OFDM symbols in the time domain, The time domain size is two time slots; there are 12 consecutive subcarriers in the frequency domain, and the frequency domain size is 180 kHz.

根据本发明的另一方面，提供了一种数据传输方法，包括：分配非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；将所述专用时隙和所述共享时隙通知给所述UE。According to another aspect of the present invention, a data transmission method is provided, comprising: allocating a dedicated time slot on an unlicensed carrier and a shared time slot on the unlicensed carrier, wherein the dedicated time slot is for a user equipment Performing, by the UE, device-to-device D2D data transmission, where the shared time slot is used for performing two D2D data transmissions by two or more UEs including the UE; and notifying the dedicated time slot and the shared time slot to the UE.

可选地，分配所述非授权载波上的所述专用时隙和所述非授权载波上的所述共享时隙包括：接收所述UE发送的请求进行上行调度的请求消息；根据所述请求消息分配上行资源并将分配的所述上行资源通知给所述UE；接收所述UE利用所述上行资源发送的用于控制所述D2D数据传输的控制信息；根据所述控制信息分配所述专用时隙和所述共享时隙。Optionally, allocating the dedicated time slot on the unlicensed carrier and the shared time slot on the unlicensed carrier include: receiving a request message sent by the UE for uplink scheduling; according to the request Transmitting an uplink resource to the UE and notifying the allocated uplink resource to the UE; receiving, by the UE, control information, used by the uplink resource, to control the D2D data transmission; and allocating the dedicated according to the control information A time slot and the shared time slot.

可选地，接收所述UE利用所述上行资源发送的用于控制所述D2D数据传输的所述控制信息包括：接收所述UE利用所述上行资源通过设备到设备传输报告D2D TR发送的所述控制信息，其中，所述D2D TR为根据上行共享信道UL-SCH中逻辑信道标识LCID保留的可扩展字段确定的D2D数据传输报告指令，所述报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。Optionally, receiving, by the UE, the control information that is used by the UE to control the D2D data transmission by using the uplink resource, includes: receiving, by using the uplink resource, the device to transmit a report by using a device to device transmission report D2D TR. The control information, wherein the D2D TR is a D2D data transmission report instruction determined according to an expandable field reserved by a logical channel identifier LCID in an uplink shared channel UL-SCH, where the report instruction includes a data type, a priority, and a sender number. , Receiver number, data, and loop check digit.

可选地，根据所述控制信息分配所述专用时隙和所述共享时隙包括：在所述非授权载波上进行空闲信道评估CCA检测；在检测到所述非授权载波空闲后，根据所述控制信息分配所述专用时隙和所述共享时隙。Optionally, allocating the dedicated time slot and the shared time slot according to the control information includes: performing idle channel estimation CCA detection on the unlicensed carrier; after detecting that the unlicensed carrier is idle, according to the The control information allocates the dedicated time slot and the shared time slot.

可选地，在分配用于所述UE进行所述D2D数据传输的非授权载波上的专用时隙和用于包括所述UE在内的两个以上UE进行所述D2D数据传输的非授权载波上的共享时隙之后，所述方法还包括：在所述共享时隙上 进行空闲信道评估CCA检测；当检测到所述共享时隙空闲的连续时间长度大于用于所述UE进行所述D2D数据传输的时长时，收回分配的所述专用时隙和所述共享时隙。Optionally, a dedicated time slot allocated on an unlicensed carrier for performing the D2D data transmission by the UE and an unlicensed carrier for performing the D2D data transmission by two or more UEs including the UE After the shared time slot, the method further includes: on the shared time slot Performing a clear channel assessment CCA detection; retrieving the allocated dedicated time slot and the shared time slot when detecting that the shared time slot is idle for a continuous time length greater than a duration for the UE to perform the D2D data transmission .

可选地，所述专用时隙和/或所述共享时隙所在的通信帧的最小单位为小资源块MRB，其中，一个MRB在时域上包含14个正交频分复用OFDM符号，时域大小为两个时隙；在频域上包含12个连续的子载波，频域大小为180kHz。Optionally, the smallest unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a small resource block MRB, where one MRB includes 14 orthogonal frequency division multiplexing OFDM symbols in the time domain, The time domain size is two time slots; there are 12 consecutive subcarriers in the frequency domain, and the frequency domain size is 180 kHz.

根据本发明的另一方面，提供了一种数据传输装置，包括：确定模块，设置为确定基站分配的非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；传输模块，设置为利用所述专用时隙和所述共享时隙进行所述D2D数据传输。According to another aspect of the present invention, a data transmission apparatus is provided, comprising: a determining module configured to determine a dedicated time slot on an unlicensed carrier allocated by a base station and a shared time slot on the unlicensed carrier, wherein The dedicated time slot is used by the user equipment UE to perform device-to-device D2D data transmission, and the shared time slot is used for two or more UEs including the UE to perform the D2D data transmission; and the transmission module is configured to use the The D2D data transmission is performed by a dedicated time slot and the shared time slot.

根据本发明的另一方面，提供了一种数据传输装置，包括：分配模块，设置为分配非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；通知模块，设置为将所述专用时隙和所述共享时隙通知给所述UE。According to another aspect of the present invention, a data transmission apparatus is provided, comprising: an allocation module configured to allocate a dedicated time slot on an unlicensed carrier and a shared time slot on the unlicensed carrier, wherein the dedicated time slot The slot is used for user equipment UE to perform device-to-device D2D data transmission, the shared time slot is used for two D2D data transmissions by the two or more UEs including the UE, and the notification module is configured to set the dedicated time slot Notifying the UE with the shared time slot.

本发明另一实施例提供了一种计算机存储介质，所述计算机存储介质存储有执行指令，所述执行指令用于执行上述方法实施例中的步骤之一或其组合。Another embodiment of the present invention provides a computer storage medium, where the computer storage medium stores execution instructions for performing one or a combination of the steps in the foregoing method embodiments.

通过本发明，采用确定基站分配的非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；利用所述专用时隙和所述共享时隙进行所述D2D数据传输。解决了相关技术中存在的无法利用非授权频段进行D2D通信的问题，进而达到了利用非授权频段进行D2D通信，提高资源利用 率的效果。By using the present invention, a dedicated time slot on an unlicensed carrier allocated by a base station and a shared time slot on the unlicensed carrier are used, wherein the dedicated time slot is used for user equipment UE to perform device-to-device D2D data transmission. The shared time slot is used for two D2D data transmissions by two or more UEs including the UE; and the D2D data transmission is performed by using the dedicated time slot and the shared time slot. The invention solves the problem that the D2D communication cannot be performed by using the unlicensed frequency band in the related art, thereby achieving D2D communication by using the unlicensed frequency band, thereby improving resource utilization. The effect of the rate.

附图说明DRAWINGS

此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

图1是相关技术一中的应用场景示意图；1 is a schematic diagram of an application scenario in the related art 1;

图2是相关技术一中的帧结构示意图；2 is a schematic diagram of a frame structure in the related art 1;

图3是相关技术二中的物理资源配置示意图一；3 is a schematic diagram 1 of physical resource configuration in related art 2;

图4是相关技术二中的物理资源配置示意图二；4 is a second schematic diagram of physical resource configuration in related art 2;

图5是根据本发明实施例的第一种数据传输方法的流程图；FIG. 5 is a flowchart of a first data transmission method according to an embodiment of the present invention; FIG.

图6是根据本发明实施例的第二种数据传输方法的流程图；6 is a flowchart of a second data transmission method according to an embodiment of the present invention;

图7是根据本发明实施例的LAA场景示意图；FIG. 7 is a schematic diagram of an LAA scenario according to an embodiment of the present invention; FIG.

图8是根据本发明实施例的D2D数据传输报告指令示意图；8 is a schematic diagram of a D2D data transmission report instruction according to an embodiment of the present invention;

图9是根据本发明实施例的信道资源配置的示意图；FIG. 9 is a schematic diagram of channel resource configuration according to an embodiment of the present invention; FIG.

图10是根据本发明实施例中方案一的LBE情况下对应的帧结构示意图；FIG. 10 is a schematic diagram of a corresponding frame structure in the case of an LBE according to the first solution in the embodiment of the present invention; FIG.

图11是根据本发明实施例中方案一的FBE情况下对应的帧结构示意图；11 is a schematic structural diagram of a corresponding frame in the case of FBE according to the first embodiment of the present invention;

图12是根据本发明实施例的数据传输流程图一；12 is a flow chart 1 of data transmission according to an embodiment of the present invention;

图13是根据本发明实施例中方案二的LBE情况下对应的帧结构示意图；FIG. 13 is a schematic diagram of a corresponding frame structure in the case of an LBE of the second solution according to the embodiment of the present invention; FIG.

图14是根据本发明实施例中方案二的FBE情况下对应的帧结构示意图；FIG. 14 is a schematic structural diagram of a corresponding frame in the case of FBE according to the second embodiment of the present invention; FIG.

图15是根据本发明实施例的数据传输流程图二；15 is a second flowchart of data transmission according to an embodiment of the present invention;

图16是根据本发明实施例中的不同信道接入方式下的吞吐量对比图； 16 is a comparison diagram of throughput in different channel access modes according to an embodiment of the present invention;

图17是根据本发明实施例的两种通信帧在LBE情况下的对比示意图；17 is a schematic diagram of comparison of two communication frames in the case of LBE according to an embodiment of the present invention;

图18是根据本发明实施例的专用时隙和共享时隙的示意图；18 is a schematic diagram of a dedicated time slot and a shared time slot according to an embodiment of the present invention;

图19是根据本发明实施例的第一种数据传输装置的结构框图；19 is a block diagram showing the structure of a first data transmission apparatus according to an embodiment of the present invention;

图20是根据本发明实施例的第二种数据传输装置的结构框图。20 is a block diagram showing the structure of a second type of data transmission apparatus according to an embodiment of the present invention.

具体实施方式detailed description

下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。It is to be understood that the terms "first", "second" and the like in the specification and claims of the present invention are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

在本实施例中提供了一种数据传输方法，图5是根据本发明实施例的第一种数据传输方法的流程图，如图5所示，该流程包括如下步骤：A data transmission method is provided in this embodiment. FIG. 5 is a flowchart of a first data transmission method according to an embodiment of the present invention. As shown in FIG. 5, the process includes the following steps:

步骤S502，确定基站分配的非授权载波上的专用时隙和上述非授权载波上的共享时隙，其中，该专用时隙用于用户设备UE进行设备到设备D2D数据传输，该共享时隙用于包括上述UE在内的两个以上UE进行D2D数据传输；Step S502, determining a dedicated time slot on the unlicensed carrier allocated by the base station and a shared time slot on the unlicensed carrier, where the dedicated time slot is used by the user equipment UE to perform device-to-device D2D data transmission, where the shared time slot is used. Performing D2D data transmission on two or more UEs including the foregoing UE;

步骤S504，利用上述专用时隙和共享时隙进行D2D数据传输。Step S504, performing D2D data transmission by using the dedicated time slot and the shared time slot.

其中，执行上述操作的可以是UE。The above operation may be performed by the UE.

通过上述步骤，UE可以确定基站分配的非授权载波上的专用时隙和共享时隙，其中，该专用时隙是专门由该UE使用的时隙，共享时隙是可以由多个UE通过竞争使用的方式进行使用的时隙，进而可以利用确定的专用时隙和共享时隙(若专用时隙能够传输完UE的D2D数据，则可以仅利用专用时隙进行D2D数据传输)进行D2D数据传输，从而实现了利用非授权载波进行D2D通信的目的，解决了相关技术中存在的无法利用非授权频段进行D2D通信的问题，进而达到了利用非授权频段进行D2D通 信，提高资源利用率的效果。Through the above steps, the UE may determine a dedicated time slot and a shared time slot on the unlicensed carrier allocated by the base station, where the dedicated time slot is a time slot exclusively used by the UE, and the shared time slot may be competed by multiple UEs. The used time slot is used, and the determined dedicated time slot and the shared time slot can be utilized (if the dedicated time slot can transmit the D2D data of the UE, the dedicated time slot can be used for D2D data transmission) for D2D data transmission. Therefore, the purpose of performing D2D communication by using an unlicensed carrier is achieved, and the problem that the D2D communication cannot be performed by using the unlicensed frequency band in the related art is solved, thereby achieving D2D communication by using the unlicensed frequency band. Letter, improve the effect of resource utilization.

在一个可选的实施例中，确定上述基站分配的非授权载波上的专用时隙和非授权载波上的共享时隙包括：向基站发送请求进行上行调度的请求消息；确定基站根据上述请求消息分配的上行资源；利用该上行资源将用于控制上述D2D数据传输的控制信息发送给基站；确定所述基站根据上述控制信息分配的专用时隙和共享时隙。其中，上述控制信息可以包括以下至少之一：数据源设备标识(Identity，简称为ID)、数据目的设备ID、业务类型、数据量、优先级。其中，上述的请求消息可以通过调度请求(Scheduling Request，简称为SR)资源进行上报，该SR资源可以是基站分配的且UE专用的资源。上述的SR资源和上行资源可以均是授权载波上的资源。In an optional embodiment, determining the dedicated time slot on the unlicensed carrier allocated by the base station and the shared time slot on the unlicensed carrier includes: sending a request message requesting uplink scheduling to the base station; determining, according to the request message, the base station according to the request message And the allocated uplink resource; the control information used for controlling the D2D data transmission is sent to the base station by using the uplink resource; and the dedicated time slot and the shared time slot allocated by the base station according to the control information are determined. The foregoing control information may include at least one of the following: a data source device identifier (ID), a data destination device ID, a service type, a data volume, and a priority. The foregoing request message may be reported by using a scheduling request (Scheduling Request, abbreviated as SR) resource, where the SR resource may be a resource allocated by the base station and dedicated to the UE. The above SR resources and uplink resources may both be resources on the licensed carrier.

在一个可选的实施例中，利用上述上行资源将用于控制D2D数据传输的控制信息发送给基站包括：利用上行资源通过设备到设备传输报告(D2D Transmission Report，简称为D2D TR)将上述控制信息发送给基站，其中，该D2D TR为根据上行共享信道(Uplink-Shared Channel，简称为UL-SCH)中逻辑信道标识(Logical Channel ID，简称为LCID)保留的可扩展字段确定的D2D数据传输报告指令，该报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。其中，D2D TR可以通过媒体接入控制(Media Access Control，简称为MAC)层的MAC Control Element上报。In an optional embodiment, transmitting the control information for controlling D2D data transmission to the base station by using the uplink resource includes: using the uplink resource to perform the foregoing control by using a D2D Transmission Report (D2D TR) The information is sent to the base station, where the D2D TR is a D2D data transmission determined according to an expandable field reserved by a logical channel identifier (LCID) in an Uplink-Shared Channel (UL-SCH). Reports instructions that include data type, priority, sender number, receiver number, data, and loop check bits. The D2D TR can be reported by the MAC Control Element of the Medium Access Control (MAC) layer.

在一个可选的实施例中，利用上述专用时隙和共享时隙进行D2D数据传输包括：利用上述专用时隙传输D2D数据；当利用上述专用时隙未传输完D2D数据时，利用共享时隙传输剩余的未传输完的D2D数据。在该实施例中，可以利用专用时隙和共享时隙共同完成D2D数据传输，但是需要说明的是，如果仅利用专用时隙便能够完成D2D数据的传输的情况下，可以仅利用专用时隙进行D2D数据的传输，而无需利用共享时隙进行D2D数据的传输。 In an optional embodiment, performing D2D data transmission by using the dedicated time slot and the shared time slot includes: transmitting D2D data by using the dedicated time slot; and utilizing the shared time slot when the D2D data is not transmitted by using the dedicated time slot. Transfer the remaining untransferred D2D data. In this embodiment, the D2D data transmission can be completed by using the dedicated time slot and the shared time slot, but it should be noted that if the transmission of the D2D data can be completed only by using the dedicated time slot, only the dedicated time slot can be utilized. The transmission of D2D data is performed without using the shared time slot for the transmission of D2D data.

在一个可选的实施例中，利用上述专用时隙传输D2D数据包括：在上述专用时隙上进行空闲信道评估(Clear Channel Assessment，简称为CCA)检测；当检测结果为上述专用时隙为空闲时，利用专用时隙传输D2D数据。在该实施例中，UE执行CCA检测的目的是为了再次确认专用时隙未被占用，以保证成功传输D2D数据，在实际应用时，UE也可以不用在专用时隙上进行CCA检测，具体可以根据实际情况来决定UE是否执行CCA检测。In an optional embodiment, transmitting the D2D data by using the dedicated time slot includes: performing Clear Channel Assessment (CCA) detection on the dedicated time slot; and detecting that the dedicated time slot is idle. At the time, D2D data is transmitted using a dedicated time slot. In this embodiment, the purpose of the CCA detection by the UE is to re-confirm that the dedicated time slot is not occupied, so as to ensure that the D2D data is successfully transmitted. In actual application, the UE may not perform CCA detection on the dedicated time slot. It is determined according to the actual situation whether the UE performs CCA detection.

在一个可选的实施例中，利用上述共享时隙传输剩余的未传输完的所述D2D数据包括：在上述共享时隙上进行空闲信道评估CCA检测；当检测结果为上述共享时隙为空闲时，利用共享时隙传输剩余的未传输完的D2D数据；当检测结果为上述共享时隙为忙时，等待预定时间后再次进行CCA检测，并在检测到上述共享时隙为空闲时，利用共享时隙传输剩余的未传输完的D2D数据。上述的预定时间可以根据退避算法进行确定，下面对该退避算法进行说明：在开始退避过程时，对应UE将退避计时器设置一个随机退避时间，退避时间

其中Random()是随机函数，产生的随机数在[0,1]中均匀分布；Slot Time是由***决定的基本延迟单位；CW是竞争窗口大小，由共享时隙的个数确定。通常，在检测到信道忙的时候，退避计时器停止计时，并将当前值(即，退避计时器中剩余的计时时间)作为下一次退避的延迟时间；若检测到信道空闲，则退避计时器启动递减计算。当计数器的值为0时，通信节点将发送帧。当多个D2D UE延迟并进入退避状态时，退避值(对应于上述的当前值)最小UE的将获得对信道的访问权。In an optional embodiment, transmitting the remaining untransmitted D2D data by using the shared time slot includes: performing idle channel estimation CCA detection on the shared time slot; and when the detection result is that the shared time slot is idle And transmitting the remaining untransmitted D2D data by using the shared time slot; when the detection result is that the shared time slot is busy, waiting for a predetermined time, performing CCA detection again, and detecting that the shared time slot is idle, utilizing The shared time slot transmits the remaining untransmitted D2D data. The foregoing predetermined time may be determined according to a backoff algorithm. The backoff algorithm is described below: when starting the backoff process, the corresponding UE sets a backoff timer to a random backoff time, and a backoff time.

Where Random() is a random function, the generated random numbers are evenly distributed in [0, 1]; Slot Time is the basic delay unit determined by the system; CW is the contention window size, determined by the number of shared time slots. Generally, when the channel is detected to be busy, the backoff timer stops counting, and the current value (ie, the remaining time in the backoff timer) is taken as the delay time of the next backoff; if the channel is detected to be idle, the backoff timer Start the decrement calculation. When the value of the counter is 0, the communication node will send the frame. When multiple D2D UEs delay and enter the backoff state, the backoff value (corresponding to the current value described above) of the smallest UE will gain access to the channel.

在一个可选的实施例中，上述专用时隙和/或共享时隙所在的通信帧的最小单位为小资源块(Mini Resource Block，简称为MRB)，其中，一个MRB在时域上可以包含14个正交频分复用OFDM符号，时域大小为两个时隙(即，1ms)；在频域上包含12个连续的子载波，频域大小为180kHz。其中，将通信帧中的通信长度的最小单位划分为MRB，可以实现时域与频域上的双重复用；并且，将通信帧中的通信时间分为共享时隙和专用时 隙，基站可根据上报需求对共享时隙和专用时隙进行不同的配比，并且对专用时隙进行调度；UE在专用时隙没有完成的数据交互将转入共享时隙，大大提高了资源利用率。In an optional embodiment, the minimum unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a Mini Resource Block (MRB), wherein one MRB may be included in the time domain. 14 orthogonal frequency division multiplexing OFDM symbols, the time domain size is two time slots (ie, 1 ms); 12 consecutive subcarriers are included in the frequency domain, and the frequency domain size is 180 kHz. Wherein, the minimum unit of the communication length in the communication frame is divided into MRB, which can implement double multiplexing in the time domain and the frequency domain; and, the communication time in the communication frame is divided into the shared time slot and the dedicated time. The base station can perform different ratios for the shared time slot and the dedicated time slot according to the reporting requirement, and schedule the dedicated time slot; the data interaction that the UE does not complete in the dedicated time slot will be transferred to the shared time slot, thereby greatly improving resources. Utilization rate.

在本实施例中还提供了一种数据传输方法，图6是根据本发明实施例的第二种数据传输方法的流程图，如图6所示，该流程包括如下步骤：A data transmission method is also provided in this embodiment. FIG. 6 is a flowchart of a second data transmission method according to an embodiment of the present invention. As shown in FIG. 6, the process includes the following steps:

步骤S602，分配非授权载波上的专用时隙和该非授权载波上的共享时隙，其中，上述专用时隙用于用户设备UE进行设备到设备D2D数据传输，上述共享时隙用于包括上述UE在内的两个以上UE进行D2D数据传输；Step S602, allocating a dedicated time slot on the unlicensed carrier and a shared time slot on the unlicensed carrier, where the dedicated time slot is used for user equipment UE to perform device to device D2D data transmission, and the shared time slot is used to include the foregoing D2D data transmission by two or more UEs including UE;

步骤S604，将上述专用时隙和共享时隙通知给UE。Step S604, notifying the UE of the dedicated time slot and the shared time slot.

其中，执行上述操作的可以是基站，UE在接收到基站通知的专用时隙和共享时隙后，可以利用专用时隙和共享时隙进行D2D数据传输。通过上述步骤，基站会在非授权载波上分配用于UE进行数据传输的专用时隙和共享时隙，其中，该专用时隙是专门由上述UE使用的时隙，共享时隙是可以由多个UE通过竞争使用的方式进行使用的时隙，进而UE可以利用通知的专用时隙和共享时隙(若专用时隙能够传输完UE的D2D数据，则可以仅利用专用时隙进行D2D数据传输)进行D2D数据传输，从而实现了利用非授权载波进行D2D通信的目的，解决了相关技术中存在的无法利用非授权频段进行D2D通信的问题，进而达到了利用非授权频段进行D2D通信，提高资源利用率的效果。The foregoing operation may be performed by the base station. After receiving the dedicated time slot and the shared time slot notified by the base station, the UE may perform D2D data transmission by using the dedicated time slot and the shared time slot. Through the above steps, the base station allocates dedicated time slots and shared time slots for data transmission by the UE on the unlicensed carrier, wherein the dedicated time slot is a time slot exclusively used by the UE, and the shared time slot can be multi- The time slots used by the UEs in a competitive manner, and the UE can utilize the dedicated time slot and the shared time slot of the notification (if the dedicated time slot can transmit the D2D data of the UE, the D2D data transmission can be performed only by using the dedicated time slot. The D2D data transmission is carried out, thereby realizing the purpose of performing D2D communication by using an unlicensed carrier, and solving the problem that the D2D communication cannot be performed by using the unlicensed frequency band in the related art, thereby achieving D2D communication by using the unlicensed frequency band, thereby improving resources. The effect of utilization.

在一个可选的实施例中，分配非授权载波上的专用时隙和非授权载波上的共享时隙包括：接收UE发送的请求进行上行调度的请求消息；根据上述请求消息分配上行资源并将分配的上行资源通知给UE；接收UE利用上述上行资源发送的用于控制D2D数据传输的控制信息；根据上述控制信息分配专用时隙和共享时隙。其中，上述控制信息可以包括以下至少之一：数据源设备ID、数据目的设备ID、业务类型、数据量、优先级。其中，上述的请求消息可以通过SR资源进行上报，该SR资源可以是基 站分配的且UE专用的资源。上述的SR资源和上行资源可以均是授权载波上的资源。In an optional embodiment, allocating the dedicated time slot on the unlicensed carrier and the shared time slot on the unlicensed carrier includes: receiving a request message sent by the UE for uplink scheduling; and allocating the uplink resource according to the request message; The allocated uplink resource is notified to the UE; the control information that is sent by the UE by using the foregoing uplink resource for controlling D2D data transmission is received; and the dedicated time slot and the shared time slot are allocated according to the foregoing control information. The foregoing control information may include at least one of the following: a data source device ID, a data destination device ID, a service type, a data amount, and a priority. The foregoing request message may be reported by using an SR resource, where the SR resource may be a base. Station-allocated and UE-specific resources. The above SR resources and uplink resources may both be resources on the licensed carrier.

在一个可选的实施例中，接收上述UE利用上行资源发送的用于控制D2D数据传输的控制信息包括：接收UE利用上述上行资源通过设备到设备传输报告D2D TR发送的控制信息，其中，该D2D TR为根据上行共享信道UL-SCH中逻辑信道标识LCID保留的可扩展字段确定的D2D数据传输报告指令，上述报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。其中，D2D TR可以通过MAC层的MAC Control Element上报。In an optional embodiment, the receiving, by the UE, the control information for controlling the D2D data transmission by using the uplink resource, includes: receiving, by using the foregoing uplink resource, control information sent by the device-to-device transmission report D2D TR, where The D2D TR is a D2D data transmission report instruction determined according to an extensible field reserved by a logical channel identifier LCID in the uplink shared channel UL-SCH, where the report instruction includes a data type, a priority, a sender number, a receiver number, a data, and a cyclic school. Check position. The D2D TR can be reported through the MAC Control Element of the MAC layer.

在一个可选的实施例中，根据上述控制信息分配专用时隙和所述共享时隙包括：在非授权载波上进行空闲信道评估CCA检测；在检测到非授权载波空闲后，根据上述控制信息分配专用时隙和共享时隙。在该实施例中，基站可以执行多次CCA(即，ECCA)检测。In an optional embodiment, allocating the dedicated time slot and the shared time slot according to the foregoing control information includes: performing idle channel estimation CCA detection on the unlicensed carrier; and after detecting that the unlicensed carrier is idle, according to the foregoing control information A dedicated time slot and a shared time slot are allocated. In this embodiment, the base station can perform multiple CCA (ie, ECCA) detections.

在一个可选的实施例中，在分配用于上述UE进行D2D数据传输的非授权载波上的专用时隙和用于包括UE在内的两个以上UE进行D2D数据传输的非授权载波上的共享时隙之后，该方法还包括：在上述共享时隙上进行空闲信道评估CCA检测；当检测到上述共享时隙空闲的连续时间长度大于用于UE进行D2D数据传输的时长时，收回分配的上述专用时隙和共享时隙。当检测到上述共享时隙空闲的连续时间长度大于用于UE进行D2D数据传输的时长时，可以认为UE已传输完D2D数据，从而基站可以选择收回信道，从而进行下一轮的数据传输。In an optional embodiment, the dedicated time slot on the unlicensed carrier allocated for the above-mentioned UE for D2D data transmission and the unlicensed carrier for D2D data transmission for two or more UEs including the UE After the shared time slot, the method further includes: performing idle channel estimation CCA detection on the shared time slot; and detecting that the shared time slot idle time length is greater than a duration for the UE to perform D2D data transmission, reclaiming the allocated The above dedicated time slot and shared time slot. When it is detected that the continuous time length of the shared time slot idle is greater than the duration for the UE to perform D2D data transmission, it may be considered that the UE has transmitted the D2D data, so that the base station may select to reclaim the channel, thereby performing the next round of data transmission.

在一个可选的实施例中，上述专用时隙和/或共享时隙所在的通信帧的最小单位为小资源块MRB，其中，一个MRB在时域上包含14个正交频分复用OFDM符号，时域大小为两个时隙；在频域上包含12个连续的子载波，频域大小为180kHz。In an optional embodiment, the minimum unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a small resource block MRB, wherein one MRB includes 14 orthogonal frequency division multiplexing OFDM in the time domain. Symbol, the time domain size is two time slots; contains 12 consecutive subcarriers in the frequency domain, and the frequency domain size is 180 kHz.

从上述多个实施例可知，基于目前提出的辅助授权频谱接入(License Assisted Access，简称为LAA)技术，本发明实施例中提出的是面向D2D 通信的帧结构，以改进现有方案的不足，减轻LTE基站高负荷的问题，进一步降低数据传输的时延，提升用户体验。因此，本发明实施例着眼于D2D通信在非授权频段的帧结构设计，考虑同一***(如LTE-U(LTE-Unlicensed))内和异***之间(Wi-Fi和LTE-U)的资源竞争问题，并解决相关的技术问题：It is known from the foregoing various embodiments that, according to the currently proposed Assisted Access Spectrum Access (LAA) technology, the present invention proposes to face D2D. The frame structure of the communication improves the shortage of the existing solution, alleviates the problem of high load of the LTE base station, further reduces the delay of data transmission, and improves the user experience. Therefore, the embodiments of the present invention focus on the frame structure design of the D2D communication in the unlicensed frequency band, and consider resources of the same system (such as LTE-U (LTE-Unlicensed)) and between different systems (Wi-Fi and LTE-U). Competing problems and solving related technical problems:

1)当D2D UE有传输需求时，即向基站上报传输请求，当基站检测到空闲信道时就可以控制UE进行D2D数据传输，节省了UE解析下行通知信号的时间。1) When the D2D UE has a transmission request, the transmission request is reported to the base station, and when the base station detects the idle channel, the UE can control the D2D data transmission, which saves the time for the UE to parse the downlink notification signal.

2)不同的D2D UE根据基站的仲裁结果利用非授权频段进行相关传输。D2D通信帧的通信长度的最小单位是MRB，基站按照D2D用户上报的业务和数据量进行以MRB为单位进行调度。2) Different D2D UEs use the unlicensed frequency band for related transmission according to the arbitration result of the base station. The minimum unit of communication length of the D2D communication frame is MRB, and the base station performs scheduling in units of MRB according to the service and data amount reported by the D2D user.

3)D2D通信帧的通信长度被划分为专用时隙(dedicated slot)和共享时隙(shared slot)，专用时隙对应的通信资源由基站进行调度，共享时隙的通信资源则采用随机竞争退避的方式接入，减少不同D2D UE之间发生冲突的可能。3) The communication length of the D2D communication frame is divided into a dedicated slot (shared slot) and a shared slot (shared slot). The communication resources corresponding to the dedicated slot are scheduled by the base station, and the communication resources of the shared slot are randomly competitively repelled. Mode access, reducing the possibility of collisions between different D2D UEs.

本发明实施例中提出了一种面向D2D数据交互的高资源利用率的帧结构和资源配置方法。在LAA提出的基于负载的设备(Load Based Equipment，简称为LBE)的帧结构原型基础上，采用由基站宏观控制，在时间域和频率域二维空间上划分资源的分配策略在非授权频段完成数据交互。具体的资源分配方法由D2D UE的数据量和业务类型决定。In the embodiment of the present invention, a frame structure and a resource configuration method for high resource utilization for D2D data interaction are proposed. Based on the frame structure prototype of Load Based Equipment (LBE) proposed by LAA, the allocation strategy of dividing resources in the time domain and frequency domain two-dimensional space by macro control of the base station is completed in the unlicensed frequency band. Data interaction. The specific resource allocation method is determined by the data volume and service type of the D2D UE.

下面结合具体实施例对本发明进行说明：The present invention will be described below in conjunction with specific embodiments:

本发明的实施例可以分为两部分：D2D UE与基站数据交互实施例和基于帧结构的传输实施例。Embodiments of the present invention can be divided into two parts: a D2D UE and base station data interaction embodiment and a frame structure based transmission embodiment.

下面对D2D UE与基站数据交互实施例进行说明：The following describes the data interaction example between the D2D UE and the base station:

本发明实施例主要针对如图7所示的LAA场景下，D2D UE之间在非授权频段上的通信，其中，图7是根据本发明实施例的LAA场景示意 图。The embodiment of the present invention is mainly directed to the communication between the D2D UEs on the unlicensed frequency band in the LAA scenario as shown in FIG. 7, wherein FIG. 7 is a schematic diagram of the LAA scenario according to the embodiment of the present invention. Figure.

虽然本发明实施例中的D2D通信是在非授权频段实现的，仍然需要基站进行总的调度和仲裁，这一调度和控制过程可以在授权频段进行。Although the D2D communication in the embodiment of the present invention is implemented in an unlicensed frequency band, the base station is still required to perform overall scheduling and arbitration, and the scheduling and control process can be performed in the licensed frequency band.

当D2D UE产生数据传输需求时，D2D UE首先需要将自己的进行数据传输所需的资源调度请求发送给基站，然后基站根据得到的信息做出仲裁为UE分配资源。具体包括如下步骤：When the D2D UE generates a data transmission request, the D2D UE first needs to send its own resource scheduling request required for data transmission to the base station, and then the base station arbitrates according to the obtained information to allocate resources for the UE. Specifically, the following steps are included:

Step 1，基站上报数据传输请求：D2D UE在上行控制信道(Physical Uplink Control Channel，简称为PUCCH)上通过SR通知基站自己有上行调度请求要传输，请求eNodeB(简称为eNB，对应于上述的基站)为其分配上行资源；其中SR资源为UE专用且由eNB进行分配的，关于SR的具体发送流程可以参考协议3GPP TR 36.213。然后，对应UE在基站分配的上行资源上通过D2D TR将数据传输的控制信息如数据源设备ID、数据目的设备ID、业务类型、数据量、优先级等上报给基站。D2D TR是根据当前UL-SCH中LCID保留的可扩展字段设计的D2D数据传输报告指令，D2D TR通过MAC层的MAC Control Element上报，图8是根据本发明实施例的D2D数据传输报告指令示意图。 Step 1, the base station reports the data transmission request: the D2D UE informs the base station that the uplink scheduling request is to be transmitted by the SR on the uplink control channel (PUCCH), and requests the eNodeB (referred to as eNB, corresponding to the above base station). The uplink resource is allocated to the UE. The SR resource is UE-specific and allocated by the eNB. For the specific sending process of the SR, refer to the protocol 3GPP TR 36.213. Then, the corresponding UE reports the data transmission control information, such as the data source device ID, the data destination device ID, the service type, the data volume, and the priority, to the base station through the D2D TR on the uplink resource allocated by the base station. The D2D TR is a D2D data transmission report instruction designed according to the scalable field reserved by the LCID in the current UL-SCH, and the D2D TR is reported by the MAC Control Element of the MAC layer. FIG. 8 is a schematic diagram of the D2D data transmission report instruction according to an embodiment of the present invention.

Step 2，基站仲裁分配资源：基站检测到非授权频段空闲时，就根据D2D UE的上报结果(即，D2D UE上报的控制信息)进行仲裁，并将仲裁结果发送给各个D2D UE。将非授权频段上的时隙划分为专用时隙和共享时隙两种，基站根据UE上报的信息决定专用时隙和共享时隙的配比，并且基站只公布专用时隙的仲裁结果，而对于共享时隙，各个D2D设备则采用退避的方式竞争接入。其中，基站进行CCA检测空闲信道的目的是为了便于控制，便于支持运营商的流量监测，计费等。Step 2: The base station arbitrates the allocated resources: when the base station detects that the unlicensed frequency band is idle, the base station performs arbitration according to the report result of the D2D UE (that is, the control information reported by the D2D UE), and sends the arbitration result to each D2D UE. The time slot on the unlicensed frequency band is divided into two types: a dedicated time slot and a shared time slot. The base station determines the ratio of the dedicated time slot and the shared time slot according to the information reported by the UE, and the base station only announces the arbitration result of the dedicated time slot. For shared time slots, each D2D device competes for access by means of backoff. The purpose of the CCA to detect the idle channel is to facilitate the control and facilitate the traffic monitoring and charging of the operator.

下面对基于帧结构的传输实施例进行说明：The following describes a transmission structure based on a frame structure:

在LAA的场景下，为了避免与Wi-Fi信号或者其他的LAA信号发生干扰，一般采取载波监听的方式，对应帧结构则体现在，在实际发送数据 之前，相应的帧结构中会有空闲信道评估CCA。本发明实施例可采用的方案是基于负载的设置LBE或者基于帧的设备(Frame Based Equipment，简称为FBE)。In the LAA scenario, in order to avoid interference with Wi-Fi signals or other LAA signals, the carrier sense mode is generally adopted, and the corresponding frame structure is embodied in the actual data transmission. Previously, there was a free channel evaluation CCA in the corresponding frame structure. The solution that can be adopted in the embodiment of the present invention is a load-based LBE or a Frame Based Equipment (FBE).

本发明实施例旨在设计合适的信道接入方式，提高资源利用率。在此，提出两种信道访问方案：The embodiments of the present invention aim to design a suitable channel access mode and improve resource utilization. Here, two channel access schemes are proposed:

方案一包括如下步骤： Option 1 includes the following steps:

Step 1：根据基站的仲裁结果，D2D UE先在专用时隙上进行数据交互，如果在基站分配的资源内没有完成数据交互，则进入共享时隙再次争夺信道完成余下的数据交互。为了确保对信道的持有，在每次数据交互之前都要进行CCA能量检测。图9是根据本发明实施例的信道资源配置的示意图。Step 1: According to the arbitration result of the base station, the D2D UE first performs data interaction on the dedicated time slot. If the data interaction is not completed within the resources allocated by the base station, the shared time slot is entered again to compete for the channel to complete the remaining data interaction. In order to ensure the holding of the channel, CCA energy detection is performed before each data interaction. FIG. 9 is a schematic diagram of channel resource configuration according to an embodiment of the present invention.

Step 2：在共享时隙，连续进行n个CCA之后检测到的能量小于阈值的时间长度超过通信的检测时长，基站认为信道是可占用的，数据已经完成交互，基站可以选择收回信道，进行下一轮的数据传输。Step 2: In the shared time slot, the time length of the energy detected after n consecutive CCAs is less than the threshold exceeds the detection time of the communication, and the base station considers that the channel is occupied, the data has been completed, and the base station may choose to reclaim the channel. A round of data transmission.

在LBE的帧结构情况下，帧长并非固定，LAA基站采用多个CCA，即ECCA的方式进行检测，当检测到能量小于阈值的时间长度超过可以通信的检测时长时，基站认为信道可用，LBE帧启动数据传输，与FBE结构不一样的地方在于，由于多个CCA检测，帧的结构不能与LTE的帧结构对齐，此时LAA基站需要发送一个Preamble信号。In the case of the LBE frame structure, the frame length is not fixed. The LAA base station uses multiple CCAs, that is, ECCA, to detect. When the length of time when the energy is less than the threshold is detected, the base station considers that the channel is available. Frame-initiated data transmission is different from the FBE structure in that the frame structure cannot be aligned with the frame structure of LTE due to multiple CCA detections, and the LAA base station needs to transmit a Preamble signal.

图10是根据本发明实施例中方案一的LBE情况下对应的帧结构示意图，图11是根据本发明实施例中方案一的FBE情况下对应的帧结构示意图。FIG. 10 is a schematic diagram of a corresponding frame structure in the case of an LBE according to the first embodiment of the present invention, and FIG. 11 is a schematic diagram of a corresponding frame structure in the case of the FBE according to the first embodiment of the present invention.

在非授权频段，面向D2D的数据传输的方案一可如图12所示，图12是根据本发明实施例的数据传输流程图一，该流程包括如下步骤：In the unlicensed frequency band, a scheme for D2D-oriented data transmission can be as shown in FIG. 12. FIG. 12 is a flowchart 1 of data transmission according to an embodiment of the present invention, and the process includes the following steps:

步骤S1202，D2D UE通过SR向基站上报数据传输请求；Step S1202: The D2D UE reports a data transmission request to the base station by using the SR.

步骤S1204，基站进行CCA检测，判断信道是否空闲，在判断结果为是转至步骤S1206，否则，继续进行CCA检测； Step S1204: The base station performs CCA detection to determine whether the channel is idle. If the determination result is yes, the process goes to step S1206. Otherwise, the CCA detection is continued.

步骤S1206，根据D2D UE的上报结果下发专用时隙的仲裁结果；Step S1206: The arbitration result of the dedicated time slot is delivered according to the report result of the D2D UE;

步骤S1208，D2D UE根据仲裁结果在专用时隙进行传输；Step S1208: The D2D UE performs transmission in a dedicated time slot according to the arbitration result.

步骤S1210，判断是否有多余数据未完成交互，在判断结果为是时，转至步骤S1212，否则，结束；In step S1210, it is determined whether there is redundant data that has not been completed. If the determination result is yes, the process goes to step S1212, otherwise, the process ends.

步骤S1212，利用共享时隙完成数据交互。In step S1212, the data interaction is completed by using the shared time slot.

方案二具体过程如下：The specific process of Option 2 is as follows:

Step 1：D2D UE全部采用竞争的方式接入信道。由于全部按照竞争的方式接入，故不需要基站根据上报的结果进行仲裁。D2D UE在传输数据之前，先检测信道是否被占用，若检测到信道空闲，则占用信道进行传输；若检测到信道忙，则采用一种随机退避算法，等待一段时间后再次检测信道是否空闲。Step 1: The D2D UEs all access the channel in a competitive manner. Since all accesses in a competitive manner, the base station is not required to arbitrate according to the reported result. Before transmitting the data, the D2D UE first detects whether the channel is occupied. If the channel is detected to be idle, the channel is occupied for transmission; if the channel is detected to be busy, a random backoff algorithm is adopted, and after waiting for a period of time, it is detected again whether the channel is idle.

Step 2：开始退避过程时，对应节点将退避计时器设置一个随机退避时间，退避时间

其中Random()随机函数，产生的随机数在[0,1]中均匀分布；SlotTime是由***决定的基本延迟单位；CW是竞争窗口大小，由共享时隙(可以认为非授权载波上的所有时隙均为共享时隙)的个数确定。通常，在检测到信道忙的时候，退避计时器停止计时，并将当前值(即，退避计时器剩余的计时时间)作为下一次退避的延迟时间；若检测到信道空闲，则退避计时器启动递减计算。当计数器的值为0时，通信节点将发送帧。当多个D2D UE延迟并进入退避状态时，退避值(对应于上述的当前值)最小的将获得对信道的访问权。Step 2: When starting the backoff process, the corresponding node sets a backoff timer to the backoff timer, and the backoff time.

Among them, Random() random function, the generated random number is evenly distributed in [0,1]; SlotTime is the basic delay unit determined by the system; CW is the contention window size, shared time slot (can be considered as all on the unlicensed carrier) The number of time slots are all shared time slots). Generally, when the channel is detected to be busy, the backoff timer stops counting, and the current value (ie, the remaining time of the backoff timer) is taken as the delay time of the next backoff; if the channel is detected to be idle, the backoff timer is started. Decrement calculation. When the value of the counter is 0, the communication node will send the frame. When multiple D2D UEs are delayed and enter the backoff state, the backoff value (corresponding to the current value described above) is the smallest and access to the channel will be obtained.

图13是根据本发明实施例中方案二的LBE情况下对应的帧结构示意图，图14是根据本发明实施例中方案二的FBE情况下对应的帧结构示意图。FIG. 13 is a schematic diagram of a corresponding frame structure in the case of an LBE according to the second embodiment of the present invention, and FIG. 14 is a schematic diagram of a corresponding frame structure in the case of the FBE according to the second embodiment of the present invention.

在非授权频段，面向D2D的数据传输的方案二可如图15所示，图15是根据本发明实施例的数据传输流程图二，该流程包括如下步骤： In the unlicensed frequency band, the scheme 2 for D2D-oriented data transmission can be as shown in FIG. 15. FIG. 15 is a second flowchart of data transmission according to an embodiment of the present invention, and the process includes the following steps:

步骤S1502，D2D UE有数据传输的需求；Step S1502, the D2D UE has a data transmission requirement;

步骤S1504，D2D UE对信道进行CCA检测；Step S1504: The D2D UE performs CCA detection on the channel.

步骤S1506，判断信道是否空闲，若空闲，转至步骤S1518，否则，转至步骤S1508；Step S1506, determining whether the channel is idle, if idle, go to step S1518, otherwise, go to step S1508;

步骤S1508，进入随机退避机制(利用退避算法)；Step S1508, entering a random backoff mechanism (using a backoff algorithm);

步骤S1510，产生退避时间T；Step S1510, generating a backoff time T;

步骤S1512，判断信道是否空闲，若空闲，转至步骤S1214，否则，转至步骤S1216；Step S1512, determining whether the channel is idle, if idle, go to step S1214, otherwise, go to step S1216;

步骤S1514，退避时间递减；In step S1514, the backoff time is decremented;

步骤S1516，判断退避时间是否递减至0，若递减至0则转至步骤S1218，否则，转至步骤S1212；Step S1516, it is determined whether the backoff time is decremented to 0, if decremented to 0, then go to step S1218, otherwise, go to step S1212;

步骤S1518，D2D UE完成数据交互。In step S1518, the D2D UE completes the data interaction.

图16是根据本发明实施例中的不同信道接入方式下的吞吐量对比图，由图16可以看出，随着业务量的增大，合理配置专用时隙所占比例，可使方案一对应的吞吐量大于方案二对应的吞吐量。FIG. 16 is a comparison diagram of throughputs in different channel access modes according to an embodiment of the present invention. As can be seen from FIG. 16, as the traffic volume increases, the proportion of dedicated time slots can be reasonably configured. The corresponding throughput is greater than the throughput corresponding to the second scheme.

需要说明的是，一般的情况都是在基站检测到信道空闲之后，将通知信号广播给需要进行通信的D2D UE，然后D2D设备再上报ID、业务数据量和优先级等信息给基站，基站再进行仲裁，这样就需要占用通信帧的时长。而在本发明实施例中，D2D UE可以周期性地将数据传输需求传输给基站，基站根据上报情况进行仲裁，在授权频段进行信号解析，待基站检测到信道空闲后，用户可以在非授权频段进行D2D数据交互。并且为了确认频段持有，在数据传输之前，D2D UE也要再进行一次CCA检测。图17是根据本发明实施例的两种通信帧在LBE情况下的对比示意图。It should be noted that, in a general case, after the base station detects that the channel is idle, the notification signal is broadcasted to the D2D UE that needs to communicate, and then the D2D device reports information such as the ID, the amount of service data, and the priority to the base station, and the base station re- Arbitration, which requires the length of the communication frame. In the embodiment of the present invention, the D2D UE may periodically transmit the data transmission requirement to the base station, and the base station performs arbitration according to the reporting situation, and performs signal analysis in the licensed frequency band. After the base station detects that the channel is idle, the user may be in the unlicensed frequency band. Perform D2D data interaction. And in order to confirm the band holding, the D2D UE has to perform another CCA test before the data transmission. 17 is a diagram showing a comparison of two communication frames in the case of an LBE according to an embodiment of the present invention.

本发明将通信时长划分为专用时隙和共享时隙，提高了资源利用率。基站可以根据传输需求对专用时隙和共享时隙进行灵活的配比，并且只公布对专用时隙的仲裁结果，如果有多余的数据交互将转入共享时隙采用退 避的方式接入。在共享时隙若进行若干CCA后检测到空闲，基站有权将信道收回，用于其他D2D UE的数据传输。若此时没有新的传输需求，则信道可以用于其他技术(如Wi-Fi)，这样可以避免不必要的资源浪费。图18是根据本发明实施例的专用时隙和共享时隙的示意图。The invention divides the communication duration into dedicated time slots and shared time slots, thereby improving resource utilization. The base station can flexibly match the dedicated time slot and the shared time slot according to the transmission requirement, and only announce the arbitration result for the dedicated time slot, and if there is redundant data interaction, it will be transferred to the shared time slot. Avoid the way to access. In the shared time slot, if idle is detected after performing several CCAs, the base station has the right to reclaim the channel for data transmission of other D2D UEs. If there is no new transmission requirement at this time, the channel can be used for other technologies (such as Wi-Fi), which can avoid unnecessary waste of resources. 18 is a schematic diagram of a dedicated time slot and a shared time slot in accordance with an embodiment of the present invention.

本发明实施例中设计的通信帧将通信长度的最小单位划分为MRB，一个MRB在时域上包含14个OFDM符号，时域大小为两个时隙，即1ms；在频域上包含12个连续的子载波，频域大小为180kHz；若将1个符号*1个子载波定义为一个资源粒子(Resource Element，RE)，则一个MRB包含14×12个RE。基站根据D2D的业务量和优先级对MRB进行调度分配，实现了时间域频率域二维的复用，提高了资源利用率。The communication frame designed in the embodiment of the present invention divides the minimum unit of the communication length into MRB, and one MRB includes 14 OFDM symbols in the time domain, the time domain size is two time slots, that is, 1 ms; and the frequency domain includes 12 The continuous subcarrier has a frequency domain size of 180 kHz. If one symbol *1 subcarrier is defined as one resource element (Resource Element, RE), one MRB contains 14×12 REs. The base station performs scheduling allocation on the MRB according to the traffic volume and priority of the D2D, realizes two-dimensional multiplexing in the time domain frequency domain, and improves resource utilization.

通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

在本实施例中还提供了一种数据传输装置，该装置用于实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。In the embodiment, a data transmission device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

图19是根据本发明实施例的第一种数据传输装置的结构框图，如图19所示，该装置包括确定模块192和传输模块194，下面对该装置进行说明。19 is a block diagram showing the structure of a first data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 19, the apparatus includes a determination module 192 and a transmission module 194, which will be described below.

确定模块192，设置为确定基站分配的非授权载波上的专用时隙和上 述非授权载波上的共享时隙，其中，上述专用时隙用于用户设备UE进行设备到设备D2D数据传输，上述共享时隙用于包括上述UE在内的两个以上UE进行D2D数据传输；传输模块194，连接至上述确定模块192，设置为利用上述专用时隙和共享时隙进行D2D数据传输。Determining module 192, configured to determine a dedicated time slot and on the unlicensed carrier allocated by the base station a shared time slot on the unlicensed carrier, where the dedicated time slot is used for user equipment UE to perform device to device D2D data transmission, and the shared time slot is used for D2D data transmission by two or more UEs including the foregoing UE; The transmission module 194 is coupled to the determining module 192 and configured to perform D2D data transmission by using the dedicated time slot and the shared time slot.

在一个可选的实施例中，上述确定模块192可以通过如下方式确定基站分配的非授权载波上的专用时隙和非授权载波上的共享时隙：向基站发送请求进行上行调度的请求消息；确定上述基站根据请求消息分配的上行资源；利用上述上行资源将用于控制D2D数据传输的控制信息发送给基站；确定上述基站根据控制信息分配的专用时隙和共享时隙。In an optional embodiment, the determining module 192 may determine the dedicated time slot on the unlicensed carrier allocated by the base station and the shared time slot on the unlicensed carrier by sending a request message requesting uplink scheduling to the base station; Determining an uplink resource allocated by the base station according to the request message; transmitting, by using the uplink resource, control information for controlling D2D data transmission to the base station; determining a dedicated time slot and a shared time slot allocated by the base station according to the control information.

在一个可选的实施例中，上述确定模块192可以通过如下方式利用上行资源将用于控制D2D数据传输的控制信息发送给基站：利用上行资源通过设备到设备传输报告D2D TR将控制信息发送给基站，其中，该D2D TR为根据上行共享信道UL-SCH中逻辑信道标识LCID保留的可扩展字段确定的D2D数据传输报告指令，上述报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。In an optional embodiment, the determining module 192 may send, by using an uplink resource, control information for controlling D2D data transmission to the base station by using the uplink resource to send the control information to the device by using the device-to-device transmission report D2D TR. a base station, where the D2D TR is a D2D data transmission report instruction determined according to an expandable field reserved by a logical channel identifier LCID in an uplink shared channel UL-SCH, where the report instruction includes a data type, a priority, a sender number, and a receiver number. , data and loop check digits.

在一个可选的实施例中，上述传输模块194可以通过如下方式利用专用时隙和共享时隙进行D2D数据传输：利用上述专用时隙传输D2D数据；当利用上述专用时隙未传输完D2D数据时，利用上述共享时隙传输剩余的未传输完的D2D数据。In an optional embodiment, the foregoing transmission module 194 can perform D2D data transmission by using a dedicated time slot and a shared time slot by: transmitting D2D data by using the dedicated time slot; and not transmitting D2D data when using the dedicated time slot. At the time, the remaining untransmitted D2D data is transmitted using the shared time slot described above.

在一个可选的实施例中，上述传输模块194可以通过如下方式利用专用时隙传输上述D2D数据：在专用时隙上进行空闲信道评估CCA检测；当检测结果为专用时隙为空闲时，利用专用时隙传输D2D数据。In an optional embodiment, the foregoing transmission module 194 may transmit the D2D data by using a dedicated time slot by performing idle channel estimation CCA detection on a dedicated time slot; and when the detection result is that the dedicated time slot is idle, utilizing The dedicated time slot transmits D2D data.

在一个可选的实施例中，上述传输模块194可以通过如下方式利用上述共享时隙传输剩余的未传输完的D2D数据：在上述共享时隙上进行空闲信道评估CCA检测；当检测结果为上述共享时隙为空闲时，利用上述共享时隙传输剩余的未传输完的D2D数据；当检测结果为共享时隙为忙时，等待预定时间后再次进行CCA检测，并在检测到共享时隙为空闲时， 利用共享时隙传输剩余的未传输完的D2D数据。In an optional embodiment, the foregoing transmission module 194 may transmit the remaining untransmitted D2D data by using the shared time slot by: performing idle channel estimation CCA detection on the shared time slot; When the shared time slot is idle, the remaining untransmitted D2D data is transmitted by using the shared time slot; when the detection result is that the shared time slot is busy, waiting for a predetermined time, performing CCA detection again, and detecting that the shared time slot is when idle, The remaining untransmitted D2D data is transmitted using the shared time slot.

在一个可选的实施例中，上述专用时隙和/或共享时隙所在的通信帧的最小单位为小资源块MRB，其中，一个MRB在时域上包含14个正交频分复用OFDM符号，时域大小为两个时隙；在频域上包含12个连续的子载波，频域大小为180kHz。In an optional embodiment, the minimum unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a small resource block MRB, wherein one MRB includes 14 orthogonal frequency division multiplexing OFDM in the time domain. Symbol, the time domain size is two time slots; contains 12 consecutive subcarriers in the frequency domain, and the frequency domain size is 180 kHz.

图20是根据本发明实施例的第二种数据传输装置的结构框图，如图20所示，该装置包括分配模块202和通知模块204，下面对该装置进行说明。20 is a block diagram showing the structure of a second type of data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 20, the apparatus includes an allocation module 202 and a notification module 204, which will be described below.

分配模块202，设置为分配非授权载波上的专用时隙和上述非授权载波上的共享时隙，其中，上述专用时隙用于用户设备UE进行设备到设备D2D数据传输，上述共享时隙用于包括上述UE在内的两个以上UE进行D2D数据传输；通知模块204，连接至上述分配模块202，设置为将上述专用时隙和共享时隙通知给UE。The allocating module 202 is configured to allocate a dedicated time slot on the unlicensed carrier and a shared time slot on the unlicensed carrier, where the dedicated time slot is used for the user equipment UE to perform device to device D2D data transmission, and the shared time slot is used. The D2D data transmission is performed on two or more UEs including the UE, and the notification module 204 is connected to the foregoing allocation module 202, and is configured to notify the UE of the dedicated time slot and the shared time slot.

在一个可选的实施例中，上述分配模块202可以通过如下方式分配非授权载波上的专用时隙和非授权载波上的共享时隙：接收UE发送的请求进行上行调度的请求消息；根据该请求消息分配上行资源并将分配的上行资源通知给UE；接收上述UE利用上行资源发送的用于控制D2D数据传输的控制信息；根据上述控制信息分配专用时隙和共享时隙。In an optional embodiment, the foregoing allocation module 202 may allocate a dedicated time slot on the unlicensed carrier and a shared time slot on the unlicensed carrier by: receiving a request message sent by the UE for uplink scheduling; The request message allocates an uplink resource and notifies the allocated uplink resource to the UE; and receives control information for controlling the D2D data transmission sent by the UE by using the uplink resource; and allocating the dedicated time slot and the shared time slot according to the foregoing control information.

在一个可选的实施例中，上述分配模块202可以通过如下方式接收UE利用上行资源发送的用于控制D2D数据传输的所述控制信息：接收UE利用上述上行资源通过设备到设备传输报告D2D TR发送的控制信息，其中，该D2D TR为根据上行共享信道UL-SCH中逻辑信道标识LCID保留的可扩展字段确定的D2D数据传输报告指令，上述报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。In an optional embodiment, the foregoing allocation module 202 may receive, by using the uplink resource, the control information that is sent by the UE by using an uplink resource to control D2D data transmission: the receiving UE transmits the report through the device to the device by using the uplink resource, and the D2D TR is transmitted. The transmitted control information, wherein the D2D TR is a D2D data transmission report instruction determined according to an expandable field reserved by a logical channel identifier LCID in the uplink shared channel UL-SCH, where the report instruction includes a data type, a priority, a sender number, Receiver number, data, and loop check digit.

在一个可选的实施例中，上述分配模块202可以通过如下方式根据控制信息分配专用时隙和共享时隙：在上述非授权载波上进行空闲信道评估CCA检测；在检测到上述非授权载波空闲后，根据上述控制信息分配专 用时隙和共享时隙。In an optional embodiment, the foregoing allocation module 202 may allocate a dedicated time slot and a shared time slot according to the control information by performing idle channel estimation CCA detection on the unlicensed carrier, and detecting that the unlicensed carrier is idle. After that, according to the above control information distribution Use time slots and shared time slots.

在一个可选的实施例中，上述装置还包括处理模块，该处理模块设置为在分配用于UE进行D2D数据传输的非授权载波上的专用时隙和用于包括UE在内的两个以上UE进行D2D数据传输的非授权载波上的共享时隙之后，在上述共享时隙上进行空闲信道评估CCA检测；当检测到上述共享时隙空闲的连续时间长度大于用于UE进行D2D数据传输的时长时，收回分配的专用时隙和共享时隙。In an optional embodiment, the apparatus further includes a processing module configured to allocate a dedicated time slot on an unlicensed carrier for D2D data transmission for the UE and two or more for including the UE After the UE performs the shared time slot on the unlicensed carrier for D2D data transmission, performs idle channel estimation CCA detection on the shared time slot; when detecting that the shared time slot is idle for a continuous time length greater than that for the UE to perform D2D data transmission When the time is long, the allocated dedicated time slot and shared time slot are reclaimed.

在一个可选的实施例中，上述专用时隙和/或共享时隙所在的通信帧的最小单位为小资源块MRB，其中，一个MRB在时域上包含14个正交频分复用OFDM符号，时域大小为两个时隙；在频域上包含12个连续的子载波，频域大小为180kHz。In an optional embodiment, the minimum unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a small resource block MRB, wherein one MRB includes 14 orthogonal frequency division multiplexing OFDM in the time domain. Symbol, the time domain size is two time slots; contains 12 consecutive subcarriers in the frequency domain, and the frequency domain size is 180 kHz.

需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述模块分别位于多个处理器中。It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the modules are located in multiple In the processor.

本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行以下步骤的程序代码：Embodiments of the present invention also provide a storage medium. Optionally, in the embodiment, the foregoing storage medium may be configured to store program code for performing the following steps:

S1，确定基站分配的非授权载波上的专用时隙和上述非授权载波上的共享时隙，其中，该专用时隙用于用户设备UE进行设备到设备D2D数据传输，该共享时隙用于包括上述UE在内的两个以上UE进行D2D数据传输；S1, determining a dedicated time slot on the unlicensed carrier allocated by the base station and a shared time slot on the unlicensed carrier, where the dedicated time slot is used by the user equipment UE to perform device-to-device D2D data transmission, where the shared time slot is used for Performing D2D data transmission by two or more UEs including the foregoing UE;

S2，利用上述专用时隙和共享时隙进行D2D数据传输。S2, performing D2D data transmission by using the dedicated time slot and the shared time slot.

可选地，存储介质还被设置为存储用于执行以下步骤的程序代码：Optionally, the storage medium is further arranged to store program code for performing the following steps:

S1，分配非授权载波上的专用时隙和该非授权载波上的共享时隙，其中，上述专用时隙用于用户设备UE进行设备到设备D2D数据传输，上述共享时隙用于包括上述UE在内的两个以上UE进行D2D数据传输； S1, allocating a dedicated time slot on the unlicensed carrier and a shared time slot on the unlicensed carrier, where the dedicated time slot is used for user equipment UE to perform device to device D2D data transmission, and the shared time slot is used to include the foregoing UE D2D data transmission by two or more UEs within;

S2，将上述专用时隙和共享时隙通知给UE。S2, notifying the UE of the dedicated time slot and the shared time slot.

可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(Read-Only Memory，简称为ROM)、随机存取存储器(Random Access Memory，简称为RAM)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。Optionally, in the embodiment, the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), and a Random Access Memory (RAM). A variety of media that can store program code, such as a hard disk, a disk, or an optical disk.

可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述各步骤。Optionally, in the embodiment, the processor performs the above steps according to the stored program code in the storage medium.

可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。For example, the specific examples in this embodiment may refer to the examples described in the foregoing embodiments and the optional embodiments, and details are not described herein again.

通过本发明上述实施例可以达到如下效果：The following effects can be achieved by the above embodiments of the present invention:

1)D2D UE向基站上报数据请求，基站根据上报结果进行仲裁，待基站检测到信道空闲后即可进行传输，不需要在通信帧中占用通信时间解析基站的调度指令；1) The D2D UE reports a data request to the base station, and the base station performs arbitration according to the reported result. After the base station detects that the channel is idle, the base station can perform transmission, and does not need to occupy the communication time to resolve the scheduling instruction of the base station in the communication frame;

2)将通信帧中的通信长度的最小单位划分为MRB，实现时域与频域上的双重复用；并且，将通信帧中的通信时间分为共享时隙和专用时隙，基站可根据上报需求对共享时隙和专用时隙进行不同的配比，并且对专用时隙进行调度；UE在专用时隙没有完成的数据交互将转入共享时隙，大大提高了资源利用率。2) dividing the minimum unit of the communication length in the communication frame into MRB, realizing double multiplexing in the time domain and the frequency domain; and dividing the communication time in the communication frame into a shared time slot and a dedicated time slot, the base station may The reporting requirement performs different ratios for the shared time slot and the dedicated time slot, and schedules the dedicated time slot; the data interaction that the UE does not complete in the dedicated time slot will be transferred to the shared time slot, thereby greatly improving resource utilization.

显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于 本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Various modifications and changes of the present invention are possible in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

工业实用性Industrial applicability

如上所述，本发明实施例提供的一种数据传输方法及装置具有以下有益效果：解决了相关技术中存在的无法利用非授权频段进行D2D通信的问题，进而达到了利用非授权频段进行D2D通信，提高资源利用率的效果。 As described above, the data transmission method and apparatus provided by the embodiments of the present invention have the following beneficial effects: solving the problem that the D2D communication cannot be performed by using the unlicensed frequency band in the related art, thereby achieving D2D communication using the unlicensed frequency band. To improve the efficiency of resource utilization.

Claims (15)

1. 一种数据传输方法，包括：A data transmission method includes:

   确定基站分配的非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；Determining a dedicated time slot on the unlicensed carrier allocated by the base station and a shared time slot on the unlicensed carrier, wherein the dedicated time slot is used for user equipment UE to perform device to device D2D data transmission, and the shared time slot is used Performing the D2D data transmission on two or more UEs including the UE;

   利用所述专用时隙和所述共享时隙进行所述D2D数据传输。The D2D data transmission is performed using the dedicated time slot and the shared time slot.
2. 根据权利要求1所述的方法，其中，确定所述基站分配的所述非授权载波上的所述专用时隙和所述非授权载波上的所述共享时隙包括：The method of claim 1, wherein determining the dedicated time slot on the unlicensed carrier and the shared time slot on the unlicensed carrier allocated by the base station comprises:

   向所述基站发送请求进行上行调度的请求消息；Sending a request message requesting uplink scheduling to the base station;

   确定所述基站根据所述请求消息分配的上行资源；Determining, by the base station, an uplink resource that is allocated according to the request message;

   利用所述上行资源将用于控制所述D2D数据传输的控制信息发送给所述基站；Transmitting control information for controlling the D2D data transmission to the base station by using the uplink resource;

   确定所述基站根据所述控制信息分配的所述专用时隙和所述共享时隙。Determining the dedicated time slot and the shared time slot allocated by the base station according to the control information.
3. 根据权利要求2所述的方法，其中，利用所述上行资源将用于控制所述D2D数据传输的所述控制信息发送给所述基站包括：The method of claim 2, wherein the transmitting, by using the uplink resource, the control information for controlling the D2D data transmission to the base station comprises:

   利用所述上行资源通过设备到设备传输报告D2D TR将所述控制信息发送给所述基站，其中，所述D2D TR为根据上行共享信道UL-SCH中逻辑信道标识LCID保留的可扩展字段确定的D2D数据传输报告指令，所述报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。Transmitting, by the uplink resource, the control information to the base station by using a device-to-device transmission report D2D TR, where the D2D TR is determined according to an expandable field reserved by a logical channel identifier LCID in an uplink shared channel UL-SCH The D2D data transmission report instruction includes a data type, a priority, a sender number, a receiver number, a data, and a loop check bit.
4. 根据权利要求1所述的方法，其中，利用所述专用时隙和所述共享时隙进行所述D2D数据传输包括：The method of claim 1, wherein the performing the D2D data transmission using the dedicated time slot and the shared time slot comprises:

   利用所述专用时隙传输所述D2D数据；Transmitting the D2D data by using the dedicated time slot;

   当利用所述专用时隙未传输完所述D2D数据时，利用所述共享时 隙传输剩余的未传输完的所述D2D数据。When the D2D data is not transmitted using the dedicated time slot, the sharing time is utilized The gap transmits the remaining untransmitted D2D data.
5. 根据权利要求4所述的方法，其中，利用所述专用时隙传输所述D2D数据包括：The method of claim 4 wherein transmitting the D2D data using the dedicated time slot comprises:

   在所述专用时隙上进行空闲信道评估CCA检测；Performing an idle channel assessment CCA detection on the dedicated time slot;

   当检测结果为所述专用时隙为空闲时，利用所述专用时隙传输所述D2D数据。When the detection result is that the dedicated time slot is idle, the D2D data is transmitted by using the dedicated time slot.
6. 根据权利要求4所述的方法，其中，利用所述共享时隙传输剩余的未传输完的所述D2D数据包括：The method of claim 4, wherein transmitting the remaining untransmitted D2D data using the shared time slot comprises:

   在所述共享时隙上进行空闲信道评估CCA检测；Performing an idle channel assessment CCA detection on the shared time slot;

   当检测结果为所述共享时隙为空闲时，利用所述共享时隙传输剩余的未传输完的所述D2D数据；When the detection result is that the shared time slot is idle, the remaining untransmitted D2D data is transmitted by using the shared time slot;

   当检测结果为所述共享时隙为忙时，等待预定时间后再次进行CCA检测，并在检测到所述共享时隙为空闲时，利用所述共享时隙传输剩余的未传输完的所述D2D数据。When the detection result is that the shared time slot is busy, the CCA detection is performed again after waiting for a predetermined time, and when the shared time slot is detected to be idle, the remaining untransmitted transmission is transmitted by using the shared time slot. D2D data.
7. 根据权利要求1至6中任一项所述的方法，其中，所述专用时隙和/或所述共享时隙所在的通信帧的最小单位为小资源块MRB，其中，一个MRB在时域上包含14个正交频分复用OFDM符号，时域大小为两个时隙；在频域上包含12个连续的子载波，频域大小为180kHz。The method according to any one of claims 1 to 6, wherein the smallest unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a small resource block MRB, wherein one MRB is in the time domain There are 14 orthogonal frequency division multiplexing OFDM symbols, the time domain size is two time slots; 12 consecutive subcarriers are included in the frequency domain, and the frequency domain size is 180 kHz.
8. 一种数据传输方法，包括：A data transmission method includes:

   分配非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；Allocating a dedicated time slot on the unlicensed carrier and a shared time slot on the unlicensed carrier, wherein the dedicated time slot is used by the user equipment UE for device to device D2D data transmission, the shared time slot being used for including Performing the D2D data transmission by two or more UEs, such as the UE;

   将所述专用时隙和所述共享时隙通知给所述UE。Notifying the dedicated time slot and the shared time slot to the UE.
9. 根据权利要求8所述的方法，其中，分配所述非授权载波上的所述专用时隙和所述非授权载波上的所述共享时隙包括： The method of claim 8 wherein allocating the dedicated time slot on the unlicensed carrier and the shared time slot on the unlicensed carrier comprises:

   接收所述UE发送的请求进行上行调度的请求消息；Receiving a request message sent by the UE for performing uplink scheduling;

   根据所述请求消息分配上行资源并将分配的所述上行资源通知给所述UE；Allocating an uplink resource according to the request message, and notifying the allocated uplink resource to the UE;

   接收所述UE利用所述上行资源发送的用于控制所述D2D数据传输的控制信息；Receiving, by the UE, control information, used by the uplink resource, to control the D2D data transmission;

   根据所述控制信息分配所述专用时隙和所述共享时隙。The dedicated time slot and the shared time slot are allocated according to the control information.
10. 根据权利要求9所述的方法，其中，接收所述UE利用所述上行资源发送的用于控制所述D2D数据传输的所述控制信息包括：The method according to claim 9, wherein the receiving the control information that is sent by the UE by using the uplink resource and used to control the D2D data transmission comprises:

    接收所述UE利用所述上行资源通过设备到设备传输报告D2D TR发送的所述控制信息，其中，所述D2D TR为根据上行共享信道UL-SCH中逻辑信道标识LCID保留的可扩展字段确定的D2D数据传输报告指令，所述报告指令包括数据类型、优先级、发送端编号、接收端编号、数据和循环校验位。Receiving, by the UE, the control information that is sent by the device-to-device transmission report D2D TR by using the uplink resource, where the D2D TR is determined according to an expandable field reserved by a logical channel identifier LCID in an uplink shared channel UL-SCH The D2D data transmission report instruction includes a data type, a priority, a sender number, a receiver number, a data, and a loop check bit.
11. 根据权利要求9所述的方法，其中，根据所述控制信息分配所述专用时隙和所述共享时隙包括：The method of claim 9, wherein allocating the dedicated time slot and the shared time slot according to the control information comprises:

    在所述非授权载波上进行空闲信道评估CCA检测；Performing an idle channel assessment CCA detection on the unlicensed carrier;

    在检测到所述非授权载波空闲后，根据所述控制信息分配所述专用时隙和所述共享时隙。After detecting that the unlicensed carrier is idle, the dedicated time slot and the shared time slot are allocated according to the control information.
12. 根据权利要求8所述的方法，其中，在分配用于所述UE进行所述D2D数据传输的非授权载波上的专用时隙和用于包括所述UE在内的两个以上UE进行所述D2D数据传输的非授权载波上的共享时隙之后，所述方法还包括：The method of claim 8, wherein said dedicated time slot on an unlicensed carrier allocated for said UE to perform said D2D data transmission and said two or more UEs including said UE After the shared time slot on the unlicensed carrier of the D2D data transmission, the method further includes:

    在所述共享时隙上进行空闲信道评估CCA检测；Performing an idle channel assessment CCA detection on the shared time slot;

    当检测到所述共享时隙空闲的连续时间长度大于用于所述UE进行所述D2D数据传输的时长时，收回分配的所述专用时隙和所述共享时隙。 When it is detected that the continuous time length of the shared time slot idle is greater than the time length for the UE to perform the D2D data transmission, the allocated dedicated time slot and the shared time slot are reclaimed.
13. 根据权利要求8至12中任一项所述的方法，其中，所述专用时隙和/或所述共享时隙所在的通信帧的最小单位为小资源块MRB，其中，一个MRB在时域上包含14个正交频分复用OFDM符号，时域大小为两个时隙；在频域上包含12个连续的子载波，频域大小为180kHz。The method according to any one of claims 8 to 12, wherein the smallest unit of the communication frame in which the dedicated time slot and/or the shared time slot is located is a small resource block MRB, wherein one MRB is in the time domain There are 14 orthogonal frequency division multiplexing OFDM symbols, the time domain size is two time slots; 12 consecutive subcarriers are included in the frequency domain, and the frequency domain size is 180 kHz.
14. 一种数据传输装置，包括：A data transmission device comprising:

    确定模块，设置为确定基站分配的非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；a determining module, configured to determine a dedicated time slot on the unlicensed carrier allocated by the base station and a shared time slot on the unlicensed carrier, wherein the dedicated time slot is used by the user equipment UE to perform device-to-device D2D data transmission, The shared time slot is used by two or more UEs including the UE to perform the D2D data transmission;

    传输模块，设置为利用所述专用时隙和所述共享时隙进行所述D2D数据传输。And a transmission module configured to perform the D2D data transmission by using the dedicated time slot and the shared time slot.
15. 一种数据传输装置，包括：A data transmission device comprising:

    分配模块，设置为分配非授权载波上的专用时隙和所述非授权载波上的共享时隙，其中，所述专用时隙用于用户设备UE进行设备到设备D2D数据传输，所述共享时隙用于包括所述UE在内的两个以上UE进行所述D2D数据传输；An allocation module, configured to allocate a dedicated time slot on the unlicensed carrier and a shared time slot on the unlicensed carrier, wherein the dedicated time slot is used by the user equipment UE to perform device-to-device D2D data transmission, where the sharing The slot is used for performing the D2D data transmission by two or more UEs including the UE;

    通知模块，设置为将所述专用时隙和所述共享时隙通知给所述UE。 The notification module is configured to notify the UE of the dedicated time slot and the shared time slot.

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