WO2012142853A2

WO2012142853A2 - Data transmission method and device, and frame structure of time division duplex system

Info

Publication number: WO2012142853A2
Application number: PCT/CN2011/085175
Authority: WO
Inventors: 郝鹏
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-04-22
Filing date: 2011-12-31
Publication date: 2012-10-26
Also published as: CN102158325B; CN102158325A; WO2012142853A3

Abstract

Disclosed are a data transmission method and device and a frame structure of a time division duplex system. The method comprises: classifying wireless frames of a TDD system into fixed downlink subframes, special subframes, fixed uplink subframes and dynamic subframes according to a predetermined rule (S302), the dynamic subframes being used for transmitting uplink data or downlink data, or canceling data transmission; and performing data transmission on the wireless frames after the classification operation (S304). The present invention achieves the effect of improving data transmission efficiency.

Description

The present invention relates to the field of communications, and in particular to a data transmission method and a frame structure of a Time Division Duplex (TDD) system. . BACKGROUND OF THE INVENTION A frame structure of a Time Division Duplex (TDD) mode of a Long Term Evolution (LTE) system (also referred to as a frame structure type 2) is shown in FIG. According to the schematic diagram of the second type of frame structure of the LTE system in the related art, as shown in FIG. 1, in the frame structure, a radio frame of 10 ms (307200 Ts, lms = 30720 Ts) is divided into two fields, each field. 5ms long ( 153600Ts). Each field contains 5 subframes of length lms. The role of each subframe is shown in Table 1, where D represents the downlink subframe used to transmit the downlink signal. U represents an uplink subframe for transmitting an uplink signal. An uplink or downlink subframe is further divided into two 0.5 ms time slots. S represents a special subframe, and includes three special time slots, that is, a Downlink Pilot Time Slot (DwPTS), which is used for transmitting a downlink signal, a guard interval (GP), and an uplink guide. Uplink Pilot Time Slot (UpPTS), which is used to transmit uplink signals. In the actual system, the upper and lower configuration indexes are notified to the mobile phone through broadcast messages. Table 1

2 is a schematic diagram of a relationship between a resource block and a resource unit according to the related art. As shown in FIG. 2, resource allocation in an LTE system is in the form of a Resource Block (RB), and one RB occupies 12 in a frequency domain. Resource element (Resource Element, RE for short) (--RE occupies a single carrier-frequency division multiple access (SC-FDMA) symbol in the time domain), occupying in the time domain One time slot, that is, one RB is in the normal cyclic prefix (Normal Cyclic Prefix, In the case of CP), 7 SC-FDMA symbols are occupied, and under the extended CP condition, 6 SC-FDMA symbols are occupied.

The uplink and downlink data services are transmitted by the LTE system using a physical uplink shared channel (PUSCH) and a physical downlink shared channel (PDSCH). Before the terminal sends the PUSCH, the base station needs to use the uplink grant signaling to notify the corresponding terminal of the time-frequency resource used by the PUSCH channel, the modulation and coding mode of the transport block, and the like. After transmitting the PUSCH, the base station will feed back the correct or error response information (ACK/NACK) of the corresponding transport block, indicating whether the corresponding transport block of the terminal is correctly received. Before the base station sends the PDSCH, the base station needs to notify the corresponding terminal by using the downlink authorization signaling.

Information such as the time-frequency resource used by the PDSCH channel, the modulation and coding scheme of the transport block, and the like. After transmitting the PDSCH, the terminal feeds back the correct or error response information of the corresponding transport block, indicating whether the corresponding transport block of the base station is correctly received. In view of the fact that the data transmission in the related art cannot satisfy the change of the uplink and the downlink traffic, resulting in a relatively low data transmission efficiency, an effective solution has not been proposed yet. SUMMARY OF THE INVENTION The present invention provides a data transmission method and a frame structure of a device in a time division duplex system, so as to at least solve the problem that the data transmission in the related art cannot satisfy the change of the uplink and downlink traffic, resulting in relatively low data transmission efficiency. . According to an aspect of the present invention, a data transmission method is provided, including: dividing a radio frame of a time division duplex (TDD) system into a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe according to a predetermined rule Data transmission is performed on the radio frame after the division operation, wherein the dynamic subframe is used to transmit uplink data, downlink data, or cancel data transmission. Preferably, performing data transmission on the radio frame after the dividing operation comprises: notifying the terminal dynamic subframe on the fixed downlink subframe or the dynamic subframe in front of the dynamic subframe for performing data transmission or the dynamic subframe for performing data transmission. The information of transmitting uplink data, transmitting downlink data, or canceling transmission data, the terminal is one, multiple or all terminals in the cell; and using the notification to perform data transmission on the dynamic subframe. Preferably, the terminal is notified in one of the following ways: sending predetermined signaling to the terminal; determining to transmit uplink data, transmit downlink data, or cancel transmission data on the dynamic subframe according to the transmission condition of the subframe before the dynamic subframe. Preferably, performing data transmission on the radio frame after the dividing operation comprises: when the physical uplink shared channel (PUSCH) is transmitted on the dynamic subframe on the radio frame after the dividing operation, transmitting the corresponding authorization of the PUSCH in one of the following locations: Signaling: a fixed downlink subframe in front of a dynamic subframe in which a PUSCH is transmitted, a downlink pilot slot DwPTS in front of a dynamic subframe in which a PUSCH is transmitted, and other dynamic subframes in which a downlink signal is transmitted in front of a dynamic subframe in which a PUSCH is transmitted; The acknowledgment/non-acknowledgement (ACK/NACK) information corresponding to the PUSCH is transmitted at one of the following positions: a fixed downlink subframe following the dynamic subframe in which the PUSCH is transmitted, and a downlink pilot slot (DwPTS) following the dynamic subframe in which the PUSCH is transmitted, The other dynamic subframes for transmitting downlink data following the dynamic subframe of the PUSCH are transmitted. Preferably, the number of subframes between the subframe where the authorization signaling is located and the first predetermined dynamic subframe where the PUSCH is located is a natural number greater than or equal to 3; the subframe where the ACK/NACK information is located and the first predetermined dynamic subframe where the PUSCH is located The number of subframes spaced between frames is a natural number greater than or equal to 3. Preferably, performing data transmission on the radio frame after the dividing operation comprises: when transmitting the physical downlink shared channel (PDSCH) on the dynamic subframe on the radio frame after the dividing operation, transmitting the PDSCH corresponding authorization in one of the following locations: Signaling: transmitting a dynamic subframe of the PDSCH, transmitting a fixed downlink subframe in front of the PDSCH, transmitting a DwPTS in front of the PDSCH, and transmitting other dynamic subframes in the PDSCH for transmitting downlink data; and transmitting a corresponding acknowledgement of the PDSCH in one of the following locations: / ACK/NACK information: a second predetermined dynamic subframe, a fixed uplink subframe following the second predetermined dynamic subframe, and other dynamic subframes subsequent to the second predetermined dynamic subframe for transmitting uplink data. Preferably, when the subframe where the authorization signaling is located and the second predetermined dynamic subframe where the PUSCH is located is located in a different subframe, the number of subframes between the subframe where the authorization signaling is located and the predetermined dynamic subframe where the PUSCH is located is greater than or a natural number equal to 3; when the subframe where the authorization signaling is located and the second predetermined dynamic subframe where the PUSCH is located is located in a different subframe, the number of subframes between the subframe where the ACK/NACK information is located and the PUSCH is greater than or equal to 3. Natural number. According to another aspect of the present invention, a data transmission apparatus is provided, including: a dividing module, configured to divide a radio frame of a time division duplex TDD system into a fixed downlink subframe, a special subframe, and a fixed uplink subframe according to a predetermined rule. And a dynamic subframe; the first transmission module is configured to perform data transmission on the radio frame after the dividing operation. Preferably, the first transmission module includes: a notification module, configured to notify the terminal dynamic subframe on a fixed downlink subframe before the dynamic subframe for performing data transmission or a dynamic subframe for performing data transmission or on the dynamic subframe For transmitting uplink data, transmitting downlink data, or canceling transmission of data, the terminal is one, multiple, or all terminals in the cell, and is used for data transmission on the dynamic subframe by using the notification. Preferably, the first transmission module includes: a first sending module, configured to: when the physical uplink shared channel PUSCH is transmitted on the dynamic subframe on the radio frame after the dividing operation, send the corresponding signaling signaling of the PUSCH in one of the following locations: a fixed downlink subframe in front of the dynamic subframe in which the PUSCH is transmitted, a downlink pilot slot (DwPTS) in front of the dynamic subframe in which the PUSCH is transmitted, and other dynamic subframes in the downlink before the dynamic subframe in which the PUSCH is transmitted; The second sending module is configured to send the corresponding acknowledge/non-acknowledgement (ACK/NACK) information of the PUSCH in one of the following locations: a fixed downlink subframe after the dynamic subframe in which the PUSCH is transmitted, and a downlink pilot behind the dynamic subframe in which the PUSCH is transmitted A time slot (DwPTS), another dynamic subframe for transmitting downlink data after the dynamic subframe of the PUSCH is transmitted. Preferably, the first transmission module includes: a third transmission module, configured to send a PDSCH corresponding authorization letter in one of the following locations when the physical downlink shared channel (PDSCH) is transmitted on the dynamic subframe on the radio frame after the division operation Let: transmit a dynamic subframe of the PDSCH, transmit a fixed downlink subframe in front of the PDSCH, transmit a DwPTS in front of the PDSCH, and transmit another dynamic subframe in the front of the PDSCH for transmitting downlink data; and the fourth transmission module is set to be in the following The acknowledgment/non-acknowledgement (ACK/NACK) information corresponding to the PDSCH is transmitted at one location: a dynamic subframe in which the PDSCH is transmitted, a fixed uplink subframe after the transmission of the PDSCH, and other dynamic subframes in the transmission of the uplink data after the transmission of the PDSCH. According to another aspect of the present invention, a frame structure of a TDD system is provided, including: a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe, where the dynamic subframe is used to transmit uplink data. , downlink data or cancel data transmission. According to the present invention, the radio frame of the TDD system is divided into multiple sub-frame structures including dynamic sub-frames, wherein the dynamic sub-frame is used for transmitting downlink data, uplink data, or canceling data transmission, which solves the problem that the data transmission cannot be satisfied in the related art. The change in the amount of underlying traffic leads to a problem of relatively low data transmission efficiency, thereby achieving an effect of improving data transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, 1 is a schematic diagram of a second type of frame structure of an LTE system according to the related art; FIG. 2 is a schematic diagram of a relationship between resource blocks and resource units according to the related art; FIG. 3 is a data transmission method according to an embodiment of the present invention; Flow chart 4 is a schematic diagram 1 of a timing relationship of a data transmission method according to an embodiment of the present invention; FIG. 5 is a schematic diagram 2 of a timing relationship of a data transmission method according to an embodiment of the present invention; FIG. 6 is a timing of a data transmission method according to an embodiment of the present invention; 3 is a schematic diagram of a timing relationship of a data transmission method according to an embodiment of the present invention; FIG. 8 is a schematic diagram of a timing relationship of a data transmission method according to an embodiment of the present invention; FIG. 9 is a data according to an embodiment of the present invention. A block diagram of a structure of a transmission device; and FIG. 10 is a block diagram showing a preferred structure of a data transmission device according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 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. This embodiment provides a data transmission method. FIG. 3 is a flowchart of a data transmission method according to an embodiment of the present invention. As shown in FIG. 3, the method includes the following steps S302 and S304. Step S302: The radio frame of the time division duplex (TDD) system is divided into a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe according to a predetermined rule, where the dynamic subframe is used for transmitting uplink data and downlink data. Or cancel the data transfer. Step S304: Perform data transmission on the radio frame after the dividing operation. Through the above steps, the radio frame of the TDD system is divided into multiple sub-frame structures including dynamic sub-frames, where the dynamic sub-frame is used for transmitting downlink data, uplink data, or canceling data transmission, which solves the problem that the data transmission cannot be satisfied in the related art. The change in the amount of underlying traffic leads to a problem of relatively low data transmission efficiency, thereby achieving an effect of improving data transmission efficiency. Preferably, a preferred embodiment of step S304 is described below. Performing data transmission on the radio frame after the dividing operation includes: notifying the terminal dynamic subframe to transmit the uplink data on the fixed downlink subframe or the dynamic subframe in front of the dynamic subframe for performing data transmission or the dynamic subframe for performing data transmission And transmitting downlink data or canceling transmission of data, the terminal is one, multiple or all terminals in the cell; and using the notification to perform data transmission on the dynamic subframe. With the preferred embodiment, after the dynamic subframe is introduced, the channel and control for transmitting data are determined. The timing relationship between channels (channels for transmitting control information) reduces the delay of data transmission, ensures the balance of control signaling load, and improves the transmission quality of the system. Preferably, the terminal is notified in one of the following ways: sending predetermined signaling to the terminal; determining to transmit uplink data, transmit downlink data, or cancel transmission data on the dynamic subframe according to the transmission condition of the subframe before the dynamic subframe. With the preferred embodiment, the diversity of the manner in which the terminal is notified is improved. Preferably, a preferred embodiment of step S304 is described below. When a PUSCH is transmitted on a dynamic subframe on a radio frame after the division operation, the PUSCH corresponding authorization signaling is sent in one of the following locations: Dynamics of transmitting PUSCH a fixed downlink subframe in front of the subframe, a downlink pilot slot DwPTS in front of the dynamic subframe in which the PUSCH is transmitted, and other dynamic subframes in the transmission subframe in front of the dynamic subframe in which the PUSCH is transmitted; Corresponding ACK/NACK information: a fixed downlink subframe following the dynamic subframe in which the PUSCH is transmitted, a DwPTS following the dynamic subframe in which the PUSCH is transmitted, and other dynamic subframes used to transmit the downlink data after the dynamic subframe in which the PUSCH is transmitted. With the preferred embodiment, the timing relationship of the dynamic subframe, the grant signaling, and the ACK/NACK information of the PUSCH is determined, and the transmission delay of transmitting the PUSCH is reduced. Preferably, the number of subframes between the subframe where the authorization signaling is located and the first predetermined dynamic subframe where the PUSCH is located is a natural number greater than or equal to 3; the subframe where the ACK/NACK information is located and the first predetermined dynamic subframe where the PUSCH is located The number of subframes spaced between frames is a natural number greater than or equal to 3. Preferably, a preferred embodiment of step S304 is described below. When the physical downlink shared channel (PDSCH) is transmitted on the dynamic subframe on the radio frame after the split operation, the PDSCH corresponding grant signaling is sent in one of the following locations: a dynamic subframe for transmitting the PDSCH, and a fixed downlink subframe for transmitting the PDSCH. Transmitting the DwPTS in front of the PDSCH, transmitting other dynamic subframes for transmitting downlink data before the PDSCH, and transmitting the corresponding ACK/NACK information of the PDSCH in one of the following positions: the second predetermined dynamic subframe and the second predetermined dynamic subframe Fixed uplink subframe, other dynamic subframes for transmitting uplink data after the second predetermined dynamic subframe. With the preferred embodiment, the timing relationship of the dynamic subframe, the grant signaling, and the ACK/NACK information for transmitting the PUDCH is determined, and the transmission delay of transmitting the PDSCH is reduced. Preferably, when the subframe where the authorization signaling is located and the second predetermined dynamic subframe where the PUSCH is located is located in a different subframe, the number of subframes between the subframe where the authorization signaling is located and the predetermined dynamic subframe where the PUSCH is located is greater than or a natural number equal to 3; when the subframe where the authorization signaling is located and the second predetermined dynamic subframe where the PUSCH is located is located in a different subframe, the number of subframes between the subframe where the ACK/NACK information is located and the PUSCH is greater than or equal to 3. Natural number. With the embodiment, as the types of applications and data services increase, the semi-static change of the uplink and downlink ratios of the TDD system can not meet the dynamic changes of the uplink and downlink traffic. After the dynamic subframe mechanism is introduced, The sub-frames can be used to transmit uplink or downlink signals according to changes in uplink and downlink traffic, dynamically converted uplink subframes or downlink subframes, and design a timing relationship between the data channel and the control channel to reduce data transmission delay and guarantee. Controlling the balance of signaling load and improving the transmission quality of the system is a problem that needs to be solved urgently. Embodiment 1 This embodiment provides a data transmission method. This embodiment combines the above embodiments and preferred embodiments thereof. The method includes the following steps 1 and 2. Step 1: Divide a radio frame, and the divided radio frame includes: a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe. The special subframe includes DwPTS, GP, UpPTS o dynamic subframe to transmit uplink signal, transmit downlink signal or not transmit any signal. Step 2: The base station notifies one or more or all terminals in the cell to transmit an uplink signal or a downlink signal or not transmit any signal on a fixed downlink subframe or a dynamic subframe in front of the dynamic subframe. The notification can be in an explicit manner or an implicit manner. Preferably, the explicit mode in step 2 is to notify by specific signaling. The implicit mode is to determine whether the current dynamic subframe should transmit an uplink or downlink signal by using the transmission condition of the subframe before the dynamic subframe. Preferably, when the dynamic subframe transmits the PUSCH, the corresponding authorization signaling is sent on the fixed downlink subframe or the DwPTS in front of the dynamic subframe or the dynamic subframe used to transmit the downlink signal, and the corresponding correct or error response is sent back. The signaling is sent on a fixed downlink subframe or DwPTS following the dynamic subframe or a dynamic subframe used to transmit the downlink signal. Preferably, in a preferred implementation of the dynamic subframe transmission PUSCH, the number of subframes between the subframe where the authorization signaling is located and the subframe where the PUSCH is located is greater than or equal to 3, and the feedback signaling of the correct or incorrect response is The number of subframes separated by the PUSCH is greater than or equal to 3. Preferably, when the dynamic subframe transmits the PDSCH, the corresponding authorization signaling is sent on the dynamic subframe or the DwPTS or on the fixed downlink subframe or DwPTS in front of the dynamic subframe or the dynamic subframe used to transmit the downlink signal. Sending, the corresponding correct or error response feedback signaling is sent on a fixed uplink subframe after the dynamic subframe or a dynamic subframe for transmitting an uplink signal. Preferably, in the foregoing scheme of transmitting a PDSCH by using a dynamic subframe, when the PDSCH and the authorization signaling are not in the same subframe, the interval between them is greater than or equal to 3, and the feedback signaling of the correct or incorrect response is The number of subframes spaced between PDSCHs is greater than or equal to three. Through the above steps of the embodiment, the data transmission delay of the dynamic subframe can be reduced, the balance of the control signaling load can be ensured, and the data transmission quality of the system can be improved. The second embodiment of the present invention provides a data transmission method. This embodiment combines the foregoing embodiments and preferred embodiments thereof. In this embodiment, a downlink grant and a PDSCH are transmitted on the same dynamic subframe, and the uplink subframe is fixed. Specifically, in the embodiment, in one radio frame, subframes 0, 5 are fixed downlink subframes; subframes 2, 7 or fixed uplink subframes; subframes 1, 6 are special subframes. , including DwPTS, GT, UpPTS; subframes 3, 4, 8, and 9 are dynamic subframes. FIG. 4 is a schematic diagram 1 of a timing relationship of a data transmission method according to an embodiment of the present invention. As shown in FIG. 4, a downlink grant and a PDSCH are transmitted on the same dynamic subframe, and an ACK/NACK is sent on a fixed uplink subframe. For example: the base station sends downlink grant signaling in subframe 3 of radio frame A+1, and transmits PDSCH on subframe 3, in subframe 7

(fixed uplink subframe) The feedback is correct or error response signaling. The third embodiment of the present invention provides a data transmission method. The embodiment combines the foregoing embodiments and preferred embodiments thereof. The embodiment sends an uplink grant on a fixed downlink subframe or a DwPTS, and sends the uplink subframe. The corresponding PUSCH transmits ACK/NACK on the fixed downlink subframe. Specifically, in a radio frame in this embodiment, subframes 0, 5 are fixed downlink subframes; subframes 2, 7 or fixed uplink subframes; subframes 1, 6 are special subframes, including DwPTS, GT , UpPTS; Subframes 3, 4, 8, and 9 are dynamic subframes. FIG. 5 is a schematic diagram of a timing relationship of a data transmission method according to an embodiment of the present invention. As shown in FIG. 5, an uplink grant is sent on a fixed downlink subframe or a DwPTS, a corresponding PUSCH is sent on a dynamic subframe, and an ACK is sent on a fixed downlink subframe. /NACK. For example: the base station sends uplink grant signaling in the DwPTS of subframe 1 of the radio frame A, the terminal transmits the PUSCH on the subframe 8 (dynamic subframe), and the base station is in the subframe 5 of the radio frame A+1 (fixed downlink subframe) Feedback correct or error response signaling. Embodiment 4 This embodiment provides a data transmission method. This embodiment combines the foregoing embodiments and preferred embodiments thereof. In this embodiment, the downlink grant and the PDSCH are transmitted on the same dynamic subframe, and the uplink sub-frame is converted by the dynamic subframe. An ACK/NACK is sent on the frame. Specifically, in one radio frame in this embodiment, subframes 0, 5 are fixed downlink subframes; subframes 2, 7 or fixed uplink subframes; subframes 1, 6 are special subframes, including DwPTS, GT, UpPTS; Subframes 3, 4, 8, and 9 are dynamic subframes. 6 is a schematic diagram 3 of a timing relationship of a data transmission method according to an embodiment of the present invention. As shown in FIG. 6, a downlink grant and a PDSCH are transmitted on the same dynamic subframe, and an ACK/NACK is sent on an uplink subframe converted by a dynamic subframe. . For example: The base station sends downlink grant signaling in subframe 4 of radio frame A+1, and transmits PDSCH on subframe 4, and feeds back a correct or error response message on subframe 8 (an uplink subframe converted by dynamic subframe). make. Embodiment 5 This embodiment provides a data transmission method. This embodiment combines the foregoing embodiment and a preferred implementation manner thereof. In this embodiment, an uplink grant is sent on a fixed downlink subframe or a DwPTS, and a corresponding uplink is sent on a dynamic subframe. PUSCH, the ACK/NACK is transmitted by the downlink subframe converted by the dynamic subframe. Specifically, in one radio frame in this embodiment, subframes 0, 5 are fixed downlink subframes; subframes 2, 7 or fixed uplink subframes; subframes 1, 6 are special subframes, including DwPTS, GT, UpPTS; subframes 3, 4, 8,

9 is a dynamic subframe. FIG. 7 is a schematic diagram 4 of a timing relationship of a data transmission method according to an embodiment of the present invention. As shown in FIG. 7, an uplink grant is sent on a fixed downlink subframe or a DwPTS, and a corresponding PUSCH is sent on a dynamic subframe, and the downlink is converted by a dynamic subframe. The subframe sends an ACK/NACK. For example: The base station sends uplink grant signaling in the DwPTS of subframe 1 of the radio frame A, the terminal transmits the PUSCH on the subframe 8 (dynamic subframe), and the base station is in the subframe 3 of the radio frame A+1 (converted by the dynamic subframe) The downlink sub-frame) is fed back with correct or error response signaling. Embodiment 6 This embodiment provides a data transmission method. The embodiment combines the foregoing embodiment and a preferred implementation manner thereof. In this embodiment, an uplink grant is sent by using a dynamic subframe in a downlink subframe of dynamic subframe conversion. The corresponding PUSCH is transmitted, and the ACK/NACK is transmitted by the downlink subframe converted by the dynamic subframe. Specifically, in one radio frame in this embodiment, subframes 0, 5 are fixed downlink subframes; subframes 2, 7 or fixed uplink subframes; subframes 1, 6 are special subframes, including DwPTS, GT, UpPTS; subframes 3, 4, 8,

9 is a dynamic subframe. FIG. 8 is a schematic diagram 5 of a timing relationship of a data transmission method according to an embodiment of the present invention. As shown in FIG. 5, an uplink grant is sent on a downlink subframe of a dynamic subframe conversion, and a corresponding PUSCH is sent on a dynamic subframe, and a dynamic subframe is transmitted. The converted downlink subframe transmits an ACK/NACK. For example: the base station transmits uplink grant signaling in subframe 4 of the radio frame A (the downlink subframe converted by the dynamic subframe), and the terminal transmits the PUSCH on the subframe 8 (dynamic subframe), and the base station is in the subframe of the radio frame A+1. Frame 3 (the downlink subframe converted by the dynamic subframe) feeds back the correct or error response signaling. The present embodiment provides a data transmission apparatus. FIG. 9 is a structural block diagram of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 9, the apparatus includes: a division module 92 and a first transmission module 94, The foregoing structure is described in detail. The dividing module 92 is configured to divide the radio frame of the time division duplex TDD system into a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe according to a predetermined rule, where the dynamic subframe is used. The uplink data, the downlink data, or the data transmission is cancelled. The first transmission module 94 is connected to the dividing module 92 for performing data transmission on the radio frame after the dividing operation of the dividing module 92. FIG. 10 is a block diagram of a preferred structure of a data transmission apparatus according to an embodiment of the present invention. As shown in FIG. 10, the first transmission module 94 includes: a notification module 941, a second transmission module 942, a first transmission module 944, and a second transmission. The module 945; the third transmission module 947, the fourth transmission module 948, the following detailed description of the structure: The first transmission module 94 includes: a notification module 941, used for data transmission dynamic subframe or data transmission The fixed downlink subframe in front of the dynamic subframe or the dynamic subframe is used to notify the terminal that the dynamic subframe is used for transmitting uplink data, transmitting downlink data, or canceling transmission of data, and the terminal is one, multiple, or all terminals in the cell; The second transmission module 942 is configured to perform data transmission on the dynamic subframe by using the notification. Preferably, the first transmission module 94 includes: a first sending module 944, configured to send a PUSCH corresponding authorization signaling in one of the following locations when the PUSCH is transmitted on the dynamic subframe on the radio frame after the dividing operation: transmitting the PUSCH a fixed downlink subframe in front of the dynamic subframe, a downlink pilot slot DwPTS in front of the dynamic subframe in which the PUSCH is transmitted, and other dynamic subframes in the downlink before the dynamic subframe in which the PUSCH is transmitted; the second sending module 945 For transmitting the physical downlink shared channel PDSCH on the dynamic subframe on the radio frame after the division operation, transmitting the corresponding acknowledge/non-acknowledgement (ACK/NACK) information of the PUSCH in one of the following positions: transmitting the dynamic subframe of the PUSCH The following fixed downlink subframe, the downlink pilot slot DwPTS following the dynamic subframe in which the PUSCH is transmitted, and other dynamic subframes after the dynamic subframe in which the PUSCH is transmitted are used to transmit downlink data. Preferably, the first transmission module 94 includes: a third transmission module 947, configured to send a PDSCH corresponding authorization letter in one of the following locations when the physical downlink shared channel PDSCH is transmitted on the dynamic subframe on the radio frame after the division operation Let: transmit the dynamic subframe of the PDSCH, transmit the fixed downlink subframe in front of the PDSCH, and transmit

a DwPTS in front of the PDSCH, and another dynamic subframe in front of the transmission PDSCH for transmitting downlink data; The fourth transmission module 948 is configured to send the ACK/NACK information corresponding to the PDSCH in one of the following locations when the PDSCH is transmitted on the dynamic subframe on the radio frame after the division operation: transmitting the dynamic subframe of the PDSCH, and transmitting the PDSCH The uplink subframe is fixed, and other dynamic subframes for transmitting uplink data behind the PDSCH are transmitted. The foregoing embodiment provides a data transmission method and apparatus, which are configured to divide a radio frame of a TDD system into multiple sub-frame structures including dynamic sub-frames, where the dynamic sub-frame is used for transmitting downlink data, uplink data, or canceling data transmission. The invention solves the problem that the data transmission in the related technology cannot satisfy the change of the upper and lower traffic volume, resulting in relatively low data transmission efficiency, thereby achieving the effect of improving the data transmission efficiency. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. 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.

Claims

Claim

1. A method of data transmission, comprising:

The radio frame of the time division duplex TDD system is divided into a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe according to a predetermined rule, where the dynamic subframe is used to transmit uplink data, downlink data, or cancel data. Transmission

Data transmission is performed on the radio frame after the dividing operation.

2. The method according to claim 1, wherein performing data transmission on the radio frame after the dividing operation comprises:

Notifying the terminal that the dynamic subframe is used for transmitting uplink data, transmitting downlink data, or canceling transmission on the fixed downlink subframe or the dynamic subframe in front of the dynamic subframe for performing data transmission or the dynamic subframe for performing data transmission Data information, the terminal is one, multiple or all terminals in the cell; data transmission is performed on the dynamic subframe by using the notification.

3. The method according to claim 2, wherein the terminal is notified in one of the following ways:

Sending predetermined signaling to the terminal;

And determining, according to the transmission condition of the subframe before the dynamic subframe, transmitting uplink data, transmitting downlink data, or canceling transmission data on the dynamic subframe.

4. The method according to claim 1, wherein performing data transmission on the radio frame after the dividing operation comprises:

When the physical uplink shared channel PUSCH is transmitted on the dynamic subframe on the radio frame after the dividing operation, the PUSCH corresponding authorization signaling is sent in one of the following positions: transmitting the dynamic sub-subtitle of the PUSCH The fixed downlink subframe in front of the frame, the downlink pilot time slot DwPTS in front of the dynamic subframe in which the PUSCH is transmitted, and other dynamic subframes used to transmit the downlink signal in front of the dynamic subframe in which the PUSCH is transmitted;

Transmitting the acknowledgment/non-acknowledgment ACK/NACK information corresponding to the PUSCH in one of the following locations: transmitting the fixed downlink subframe following the dynamic subframe of the PUSCH, and transmitting the downlink pilot following the dynamic subframe of the PUSCH The time slot DwPTS, another dynamic subframe for transmitting downlink data after the dynamic subframe of the PUSCH is transmitted.

5. The method according to claim 4, wherein

The number of subframes between the subframe where the authorization signaling is located and the first predetermined dynamic subframe where the PUSCH is located is a natural number greater than or equal to 3;

The number of subframes between the subframe in which the ACK/NACK information is located and the first predetermined dynamic subframe in which the PUSCH is located is a natural number greater than or equal to 3.

6. The method according to claim 1, wherein performing data transmission on the radio frame after the dividing operation comprises:

When the physical downlink shared channel PDSCH is transmitted on the dynamic subframe on the radio frame after the dividing operation, the PDSCH corresponding authorization signaling is sent in one of the following positions: transmitting the dynamic sub-branch of the PDSCH And transmitting the fixed downlink subframe in front of the PDSCH, transmitting the DwPTS in front of the PDSCH, and transmitting other dynamic subframes in the front of the PDSCH for transmitting downlink data;

Transmitting, by the following one location, the acknowledgment/non-acknowledgment ACK/NACK information corresponding to the PDSCH: the second predetermined dynamic subframe, the fixed uplink subframe after the second predetermined dynamic subframe, and the second Other dynamic subframes for transmitting uplink data after the predetermined dynamic subframe are scheduled.

7. The method according to claim 6, wherein

When the subframe where the authorization signaling is located and the second predetermined dynamic subframe where the PUSCH is located is located in a different subframe, the subframe where the authorization signaling is located and the predetermined dynamic subframe where the PUSCH is located The number of subintervals is a natural number greater than or equal to 3;

When the subframe where the authorization signaling is located and the second predetermined dynamic subframe where the PUSCH is located is located in a different subframe, the number of subframes between the subframe where the ACK/NACK information is located and the PUSCH is A natural number greater than or equal to 3.

8. A data transmission device comprising:

The dividing module is configured to divide the radio frame of the time division duplex TDD system into a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe according to a predetermined rule, where the dynamic subframe is used for transmitting uplink data, Downstream data or cancel data transmission;

The first transmission module is configured to perform data transmission on the radio frame after the dividing operation.

9. The device according to claim 8, wherein the first transmission module comprises: The notification module is configured to notify the terminal that the dynamic subframe is used for transmitting uplink data on the fixed downlink subframe before the dynamic subframe in which the data transmission is performed or the dynamic subframe in which the data transmission is performed, or on the dynamic subframe. Transmitting downlink data or canceling transmission of data, the terminal being one, multiple or all terminals in the cell;

The second transmission module is configured to perform data transmission on the dynamic subframe using the notification.

The device according to claim 8, wherein the first transmission module comprises:

The first sending module is configured to: when the physical uplink shared channel PUSCH is transmitted on the dynamic subframe on the radio frame after the dividing operation, send the corresponding signaling signaling of the PUSCH in one of the following locations: The fixed downlink subframe in front of the dynamic subframe of the PUSCH, the downlink pilot slot DwPTS in front of the dynamic subframe in which the PUSCH is transmitted, and the other in front of the dynamic subframe in which the PUSCH is transmitted for transmitting downlink data Dynamic subframe

The second sending module is configured to send, according to one of the following locations, the acknowledgment/non-acknowledgement ACK/NACK information corresponding to the PUSCH: transmitting the fixed downlink subframe after the dynamic subframe of the PUSCH, and transmitting the dynamic of the PUSCH The downlink pilot time slot DwPTS following the subframe, and other dynamic subframes for transmitting downlink data after the dynamic subframe of the PUSCH are transmitted.

The device according to claim 8, wherein the first transmission module comprises: a third transmission module, configured to transmit a physical downlink on the dynamic subframe on the radio frame after the dividing operation When the channel PDSCH is shared, the PDSCH corresponding authorization signaling is transmitted at one of the following locations: transmitting a dynamic subframe of the PDSCH, transmitting the fixed downlink subframe in front of the PDSCH, and transmitting a DwPTS in front of the PDSCH, Transmitting other dynamic subframes for transmitting downlink data in front of the PDSCH;

And transmitting, by the fourth transmission module, the acknowledgment/non-acknowledgment ACK/NACK information corresponding to the PDSCH: transmitting a dynamic subframe of the PDSCH, transmitting the fixed uplink subframe behind the PDSCH, and transmitting Other dynamic subframes for transmitting uplink data after the PDSCH.

A frame structure of a time division duplex TDD system, comprising: a fixed downlink subframe, a special subframe, a fixed uplink subframe, and a dynamic subframe, where the dynamic subframe is used for transmitting uplink data, downlink data, or canceling data transmission.