WO2012071872A1 - 数据传输方法及通信节点 - Google Patents

数据传输方法及通信节点 Download PDF

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Publication number
WO2012071872A1
WO2012071872A1 PCT/CN2011/075224 CN2011075224W WO2012071872A1 WO 2012071872 A1 WO2012071872 A1 WO 2012071872A1 CN 2011075224 W CN2011075224 W CN 2011075224W WO 2012071872 A1 WO2012071872 A1 WO 2012071872A1
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WIPO (PCT)
Prior art keywords
data
communication node
time interval
uplink
mode
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PCT/CN2011/075224
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English (en)
French (fr)
Inventor
鲁照华
陈宪明
刘锟
罗薇
李卫敏
Original Assignee
中兴通讯股份有限公司
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Publication of WO2012071872A1 publication Critical patent/WO2012071872A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1887Scheduling and prioritising arrangements

Definitions

  • a base station refers to a device that provides a service to a terminal, and the base station communicates with the terminal through an uplink and downlink link, where the downlink (also referred to as a forward link) refers to a direction from the base station to the terminal.
  • the uplink also known as the reverse link refers to the direction of the terminal to the base station.
  • a plurality of terminals can simultaneously transmit data to the base station through the uplink, or can simultaneously receive data from the base station through the downlink.
  • Time Division Duplex is a duplex mode commonly used in modern communication systems to separate receive and transmit channels (or uplink and downlink).
  • time division duplex mode different time slots using the same frequency carrier are received and transmitted as bearers of the channel, and time is used to ensure separation of the reception and transmission channels. Since the uplink and downlink channels use the same frequency in the time division duplex mode, the uplink and downlink channels have reciprocity, so that the time division duplex mode mobile communication system exhibits certain unique features, such as the convenience of frequency configuration, asymmetric service.
  • the relative flexibility and business channel are easy to embody the advantages of smart antennas.
  • hybrid automatic retransmission Hybrid Automatic Repeat
  • HARQ Hybrid Automatic Repeat
  • the method of data retransmission proposes a warfare, especially for synchronous HARQ data retransmission.
  • the reason is that the time point of synchronous HARQ data retransmission is related to the allocation ratio of uplink and downlink resources, and different resource allocation. The ratio will result in different data retransmission time points.
  • the initial uplink and downlink resource allocation ratio of a cell is 4:4 (one - one frame consists of 8 subframes, and the uplink and downlink services each occupy 4 subframes); when the downlink traffic increases, the cell Adjust the allocation ratio of the uplink and downlink resources to 3:5 (assuming that one frame consists of 8 subframes, the uplink service occupies 3 subframes, and the downlink service occupies 5 subframes). At this time, if the uplink and downlink resource allocation ratio is adjusted, the fourth uplink is adjusted. The synchronous HARQ data retransmission is required in the subframe (the fourth uplink subframe in the next frame).
  • the terminal Since there is no fourth uplink subframe in the new uplink and downlink resource allocation ratio, the terminal does not send uplink resources. The case of retransmitting data occurs. Of course, there may be cases where retransmission data in other uplink subframes has no resource transmission, which depends on the time unit and calculation method used in the calculation of the timing relationship of the synchronous HARQ. Similarly, when the uplink service increases, the cell will allocate the uplink and downlink resources. Adjusted to 5:3, some sub-frames with downlink synchronous HARQ retransmission (such as the 4th downlink sub-frame in Figure 1) will also appear similar to the uplink. There is currently no way to solve the above problem.
  • the data packet retransmitted by the HARQ method can be implemented by following the method of incremental redundancy or chasing and combining.
  • the mode of the uplink and downlink resource allocation ratio changes, and the retransmitted data after the change has no transmission resources, and the data transmission reliability is relatively poor.
  • the main purpose of the present invention is to provide a data transmission method and a communication node to solve the problem that the data transmission reliability is poor after the change of the mode of the uplink and downlink resource allocation ratio changes due to the change of the retransmission data without transmission resources.
  • a data transmission method is provided for use in a time division duplex (TDD) system.
  • the data transmission method includes: when the uplink and downlink resource allocation ratio is the first mode, the first communication node sends the first data to the second communication node on the first transmission time interval corresponding to the first mode; The second transmission time interval of the communication node retransmitting the first data; when the uplink and downlink resource allocation ratio changes to the second mode, the first communication node performs retransmission of the first data on the second transmission time interval.
  • Obtaining a second transmission time interval in which the first communication node retransmits the data includes: acquiring, by one of the following manners, a second transmission time interval in which the first communication node retransmits data: a system default configuration; a first communication node or a second communication node The master node in the determination is determined.
  • the method further includes: the first communication node is a master node, the second communication node is a controlled node, and the first communication node sends the second transmission time interval to The second communication node; or the first communication node is a controlled node, the second communication node is a master node, and the second communication node sends the second transmission time interval to the first communication node.
  • the method further includes: transmitting, by the first communication node, the second data to the second communication node using the second HARQ process ID on the third transmission time interval, and the first communication node is on the second transmission time interval And retransmitting the second data, where the third transmission time interval is smaller than the second time interval, and when the uplink and downlink resource allocation ratio changes to the second mode, the first communication node performs retransmission of the first data on the second transmission time interval.
  • the method includes: the first communication node performs retransmission of the first data by using the process number of the first HARQ on the second transmission time interval, where the first HARQ process ID is different from the second HARQ.
  • the method further includes: when the second communication node fails to receive the data retransmitted by the first communication node at the second transmission interval, the first The communication node retransmits the first data according to the timing relationship of the HARQ of the second mode.
  • the first transmission time interval is different from the fourth time interval, where the fourth time interval is a time interval during which the retransmission timing is affected when the uplink and downlink resource allocation ratio is changed from the first mode to the second mode.
  • TDD time division duplex
  • the data transmission method includes: the third communication node determines a condition that satisfies one of the following: Condition 1: Uplink and/or downlink data not retransmitted for transmission; Condition 2: Uplink and / Or the downlink has retransmitted data for transmission and determines a third predetermined time interval after performing the uplink and downlink resource allocation mode conversion, where the third predetermined time interval is affected according to the mode conversion retransmission timing of the uplink and downlink resource allocation ratio The transmission time interval is determined; the third communication node performs data transmission using the fourth mode of the uplink and downlink resource allocation ratio.
  • the uplink and/or downlink data that is not retransmitted for transmission includes: uplink and/or downlink data transmitted without retransmission at a fourth predetermined time interval, wherein the fourth predetermined time interval is According to the uplink and downlink resource allocation ratio, the mode conversion retransmission timing is determined by the transmission time interval affected.
  • the method further includes: the third communication node allocates resource retransmission data.
  • the communication node includes: a sending module, configured to: when the uplink and downlink resource allocation ratio is the first mode, send the first data to the second communication node on the first transmission time interval corresponding to the first mode;
  • the first transmission time interval is set to obtain the second transmission time interval in which the communication node is retransmitted by the communication node;
  • the first retransmission module is configured to perform the first time on the second transmission time interval when the uplink and downlink resource allocation ratio changes to the second mode Retransmission of data.
  • the first retransmission module includes: a retransmission submodule, configured to send the second data to the second communication node with which the first communication node transmits the second HARQ process ID on the third transmission time interval, and the communication there is The node retransmits the second data on the second transmission time interval, where the third transmission time interval is smaller than the second time interval, and the first data is retransmitted by using the process number of the first HARQ on the second transmission time interval, The first HARQ process ID is different from the second HARQ.
  • the communication node further includes: a second retransmission module, configured to: when the second communication node communicating therewith fails to successfully receive the data retransmitted by the communication node at the second transmission interval, according to the HARQ timing relationship of the second mode Retransmit the first data.
  • a communication node is provided.
  • the communication node comprises: a determination module configured to determine a condition in which the node in which it is located satisfies one of the following conditions: Condition 1: Uplink and/or downlink data not retransmitted for transmission; Condition 2: Uplink The path and/or the downlink have retransmitted data for transmission and determine a third predetermined time interval after the uplink and downlink resource allocation mode transition, wherein the third predetermined time interval is converted according to the mode of the uplink and downlink resource allocation ratio. The affected transmission time interval is determined; the transmission module is set to use the fourth mode of the uplink and downlink resource allocation ratio for data transmission.
  • the above method further includes: a data retransmission module, configured to retransmit data by using the allocated resource for the communication node where the communication node is located.
  • a data retransmission module configured to retransmit data by using the allocated resource for the communication node where the communication node is located.
  • FIG. 1 is a schematic diagram of an affected subframe when a ratio of uplink and downlink resource allocation changes according to the related art
  • FIG. 2 is a first flowchart of data transmission according to an embodiment of the present invention
  • 3 is a second flowchart of data transmission according to an embodiment of the present invention
  • FIG. 1 is a schematic diagram of an affected subframe when a ratio of uplink and downlink resource allocation changes according to the related art
  • FIG. 2 is a first flowchart of data transmission according to an embodiment of the present invention
  • 3 is a second flowchart of data transmission according to an embodiment of the present invention
  • FIG. 1 is a schematic diagram of an affected subframe when a ratio of uplink and downlink resource allocation changes according to the related art
  • FIG. 2 is a first flowchart of data transmission according to an embodiment of the present invention
  • 3 is a second flowchart of data transmission according to an embodiment of the present invention
  • FIG. 1 is a schematic diagram of an affected subframe when a ratio of uplink and downlink
  • FIG. 4 is a diagram showing a communication node using a time division duplex mode according to an embodiment of the present invention, using synchronous HARQ data when a ratio of uplink and downlink resource allocation changes
  • FIG. 5 is a flowchart of data transmission performed by a communication node in a time division duplex mode according to an embodiment of the present invention when a ratio of uplink and downlink resource allocation changes
  • FIG. 6 is a flowchart of FIG.
  • FIG. 7 is a first structural block diagram of a communication node in accordance with an embodiment of the present invention
  • FIG. 8 is a second structural block diagram of a communication node in an embodiment of the present invention
  • Figure 9 is a block diagram of a preferred second configuration of a communication node in accordance with an embodiment of the present invention.
  • FIG. 2 is a first flowchart of data transmission according to an embodiment of the present invention. As shown in FIG. 2, the method includes: S202: When the uplink and downlink resource allocation ratio is the first mode, the first communications node sends the first data to the second communications node in the first transmission time interval corresponding to the first mode.
  • Step S204 Acquire the first communications node retransmission a second transmission time interval of the first data
  • Step S206 When the uplink and downlink resource allocation ratio changes to the second mode, the first communication node performs retransmission of the first data on the second transmission time interval.
  • the step S4 includes: obtaining, by one of the following manners, a second transmission time interval in which the first communication node retransmits data: a system default configuration; in the first communication node or the second communication node The master node determines.
  • the second transmission time interval can be flexibly configured, reducing system complexity.
  • the method further includes: the first communication node is a master node, the second communication node is a controlled node, and the first communication node sends the second transmission time interval to the second communication node; or the first communication The node is a controlled node, the second communication node is a master node, and the second communication node sends the second transmission time interval to the first communication node.
  • the master node transmits the determined transmission time interval to the node with which it communicates, improving the reliability of the second transmission time interval transmission.
  • the first communication node transmits the second data to the second communication node by using the second HARQ process ID on the third transmission time interval, and the first communication node retransmits the second data on the second transmission time interval, where The third transmission time interval is smaller than the second time interval.
  • a preferred embodiment of step S206 is described below.
  • the first communication node performs retransmission of the first data by using the process number of the first HARQ on the second transmission time interval, where the first HARQ process ID is different from the second HARQ.
  • the different data of the retransmission is distinguished by different HARQ process numbers, which improves the accuracy of the communication node receiving the retransmitted data.
  • the method further includes: when the second communication node fails to successfully receive the data retransmitted by the first communication node in the second transmission interval, the first communication node retransmits according to the HARQ timing relationship of the second mode.
  • First data With the preferred embodiment, after being converted to the second mode, the first data is retransmitted with a new timing relationship corresponding to the mode, which improves the reliability and stability of the system transmission data.
  • the first transmission time interval is different from the fourth time interval, wherein the fourth time interval is a time interval during which the retransmission timing is affected when the uplink and downlink resource allocation ratio is changed from the first mode to the second mode.
  • FIG. 3 is a second flowchart of data transmission according to an embodiment of the present invention. As shown in FIG.
  • the method includes: S302: The third communication node determines a condition that satisfies one of the following conditions: Condition 1: data that is not retransmitted on the uplink and/or the downlink is transmitted; Condition 2: The uplink and/or downlink has retransmitted data for transmission and determines a third predetermined time interval after the uplink and downlink resource allocation mode transition, wherein the third predetermined time interval is according to the uplink and downlink resource allocation ratio The mode conversion retransmission timing is determined by the transmission time interval affected.
  • the transmission of data that is not retransmitted in the uplink and/or the downlink in the condition 1 includes: transmitting, by the uplink and/or the downlink, data that is not retransmitted in the fourth predetermined time interval, where The four predetermined time intervals are determined according to the transmission time interval affected by the mode conversion retransmission timing of the uplink and downlink resource allocation ratio.
  • the communication node determines that the data that is not retransmitted during the fourth predetermined time interval is transmitted, and ensures the reliability of retransmitting the data after the uplink and downlink resource allocation mode conversion.
  • the method further includes: the third communication node allocates resource retransmission data.
  • the third communication node allocates new resources for data that needs to be retransmitted by allocating resources, thereby improving the reliability and accuracy of data transmission of the TDD system.
  • Embodiment 1 This embodiment provides a data transmission method. This embodiment combines the above embodiments and preferred embodiments thereof.
  • FIG. 4 is a flowchart of data transmission by using a synchronous HARQ data retransmission mode when a communication node of a time division duplex mode is changed according to an embodiment of the present invention. As shown in FIG. 4, the method includes Step S402: When the uplink and downlink resource allocation ratio is mode A, the first communication node sends data to the second communication node by using the first resource on the first transmission time interval.
  • Step S404 After the uplink and downlink resource allocation ratio changes to mode B, the first communication node needs to retransmit data to the second communication node by using the second resource on the second transmission time interval, where the first transmission time interval and the second transmission
  • the timing relationship of the time interval can be configured by default or dynamically adjusted.
  • the first resource and the second resource may be the same.
  • the first communication node is a master node for resource allocation
  • the second communication node is a controlled node
  • the second communication node is a master node for resource allocation
  • the master node notifies the controlled node of the first transmission before the uplink and downlink resource allocation ratio is converted into mode B.
  • the timing relationship of the time interval and the second transmission time interval, and/or the second resource used by the controlled node to transmit or receive data Preferably, the timing relationship of the first transmission time interval and the second transmission time interval depends on mode A, and/or mode B.
  • the first communication node transmits data to the second communication node on the third transmission time interval, and the first communication node needs to retransmit data to the second communication node on the second transmission time interval, wherein the third transmission The time interval is advanced in time over the second transmission and time interval, and the HARQ process number used by the first communication node on the first transmission time interval and the third transmission time interval is different. With the preferred embodiment, the accuracy of retransmitting data is improved.
  • the first communication node when the second communication node fails to successfully receive the data retransmitted by the first communication node at the second transmission time interval, the first communication node continues to retransmit the data according to the timing relationship specified by the mode B.
  • the first transmission interval is different from the transmission time interval in which the retransmission timing is affected after the uplink and downlink resource allocation ratio of the communication node is changed from mode A to mode B.
  • the master node when the first communication node or the second communication node is the master node for resource allocation, the master node does not assign the weight to the first communication node in the time zone from the mode A to the length L before the mode B.
  • Embodiment 2 This embodiment provides a data transmission method.
  • Embodiment 1 combines Embodiment 1 and a preferred embodiment thereof.
  • one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load.
  • the cell BS-A base station
  • the uplink and downlink resource allocation ratio to mode B (3:5).
  • the terminal MS-A that uses the BS-A as the serving base station transmits data through the resource block RB-A on the fourth uplink subframe of the ith frame (the BS-A ⁇ mode A in the frame) and is not BS- If A successfully receives, according to the requirement of mode A, the timing relationship of the synchronous HARQ retransmission MS-A needs to retransmit the data in the fourth uplink subframe of the (i + 1) frame. If the mode B is used in the (i + 1) frame BS-A, the 4th uplink subframe does not exist in the (i+1)th frame, and the MS-A is configured according to the system default configuration or the standard default configuration. The pattern A is converted to the timing relationship of mode B.
  • the data is retransmitted through the resource block RB-A on the third uplink subframe on the (i + 1)th frame.
  • the BS-A may notify the MS-A to retransmit the resource block RB-B different from the resource block RB-A on the third uplink subframe on the (i + 1) frame by resource allocation signaling.
  • Embodiment 3 This embodiment provides a data transmission method. This embodiment combines Embodiment 1 and a preferred embodiment thereof.
  • one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load.
  • the cell BS-A base station
  • the uplink and downlink resource allocation ratio is mode B (2:6).
  • the terminal MS-A that uses the BS-A as the serving base station transmits data through the resource block RB-A on the second uplink subframe of the ith frame (in the frame BS-A ⁇ mode A) and is not BS- If A successfully receives, according to the requirement of mode A, the timing relationship of the synchronous HARQ retransmission MS-A needs to retransmit the data in the sixth subframe of the (i + 1) frame.
  • the mode B is used in the (i + 1) frame BS-A
  • the sixth subframe in the (i+1)th frame is the downlink subframe
  • the MS-A is based on the BS-A in the (i) + 1) Retransmit the data on the retransmitted resource obtained by the resource allocation signaling on the frame.
  • the BS-A allocates the resource block RB-B of the first uplink subframe in the frame, so that the MS-A retransmits the data, or configures the resource block RB-B of the first uplink subframe in the frame for the MS- A retransmits the data, that is, the timing relationship of the synchronous HARQ in this case can be dynamically adjusted.
  • Embodiment 4 This embodiment provides a data transmission method. This embodiment combines Embodiment 1 and a preferred embodiment thereof. In the wireless communication system of the time division duplex mode, one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load. The situation changes, the cell BS-A (base station) adjusts the uplink and downlink resource allocation ratio to mode B (3:5).
  • BS-A is the terminal MS-A of the monthly base station, mode A is used before the i-th frame and the ith frame, and mode B is used after the (i + 1) frame starts, then BS-A is in the first
  • the MS-A is allocated in advance to the MS-A in the frame before the i-frame or the ith frame, possibly in the (i + 1) frame or the frame after the frame, if MS-A
  • the synchronous HARQ data retransmission needs to be performed on the (i + 1) frame or the frame after the frame, and the retransmission resource is used. Otherwise, the BS-A may allocate the resource to other users for use.
  • Embodiment 5 This embodiment provides a data transmission method. This embodiment combines Embodiment 1 and a preferred embodiment thereof.
  • one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load.
  • the cell BS-A base station
  • BS-A is the terminal MS-A of the monthly base station
  • mode A is used before the i-th frame and the ith frame
  • mode B is used after the (i + 1) frame starts
  • BS-A is in the first In the frame before the i frame or the ith frame
  • the MS-A is notified of the timing relationship of the HARQ after the mode B is switched from the mode A.
  • Embodiment 6 This embodiment provides a data transmission method. This embodiment combines Embodiment 1 and a preferred embodiment thereof. In the wireless communication system of the time division duplex mode, one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load. The situation changes, the cell BS-A (base station) adjusts the uplink and downlink resource allocation ratio to mode B (3:5).
  • the terminal MS-A with the BS-A as the serving base station transmits the data DT-A on the 4th uplink subframe of the ith frame (the BS-A mode A in the frame), and is not BS-A.
  • the timing relationship of the synchronous HARQ retransmission MS-A needs to retransmit the data in the 4th uplink subframe of the (i + 1) frame, if in the (i + 1) If the frame BS-A uses mode B, then the 4th uplink subframe does not exist in the (i+1)th frame.
  • the MS-A follows the system default configuration, or the standard default configuration, or the dynamically configured mode A.
  • the timing relationship converted to mode B retransmits the data through the resource block RB-A on the 3rd uplink subframe of the (i + 1)th frame. It should be noted that if the MS-A transmits the data DT-B on the third uplink subframe on the ith frame, and is not successfully received by the BS-A, and the MS-A follows the specified timing relationship in the (i) + 1) Data retransmission on the third uplink subframe of the frame, BS-A needs to schedule to ensure that the process number used by MS-A to retransmit the two data on the subframe is different, otherwise it will cause BS-A cannot judge the data of DT-B or DT-A retransmitted by MS-A, especially if the retransmission resource changes.
  • Embodiment 7 This embodiment provides a data transmission method.
  • This embodiment combines Embodiment 1 and a preferred embodiment thereof.
  • one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load.
  • the cell BS-A base station
  • the uplink and downlink resource allocation ratio is to mode B (2:6).
  • the uplink subframe affected by the retransmission timing in mode A is the third uplink subframe and the fourth uplink subframe, and is converted from the (i + 1) frame to the mode.
  • Embodiment 8 This embodiment provides a data transmission method. This embodiment combines the above embodiments and preferred embodiments thereof. In the embodiment of the present invention, data transmission is performed by selecting a time point when the uplink and downlink resource allocation ratio changes.
  • FIG. 5 is a flowchart of performing data transmission when a communication node of a time-division duplex mode changes when the uplink/downlink resource allocation ratio changes according to an embodiment of the present invention. As shown in FIG.
  • the method includes: Step S502: determining uplink and downlink The resource allocation ratio is that the communication node of mode A is in the uplink, and/or the downlink has no data to be retransmitted, or the communication node determines the time interval after the transition from mode A to mode B is L; step S504 : The uplink and downlink resource allocation ratio used by the communication node is converted to mode B.
  • step S502 determining uplink and downlink The resource allocation ratio is that the communication node of mode A is in the uplink, and/or the downlink has no data to be retransmitted, or the communication node determines the time interval after the transition from mode A to mode B is L; step S504 : The uplink and downlink resource allocation ratio used by the communication node is converted to mode B.
  • Retransmission means that no data needs to be retransmitted during a specific transmission time interval.
  • the specific transmission time interval refers to a transmission time interval in which the retransmission timing is affected when the uplink and downlink resource allocation ratio of the communication node is changed from mode A to mode B, and the synchronous HARQ data retransmission mode is used.
  • the communication node allocates new resources for data that needs to be retransmitted.
  • the wireless communication system can dynamically adjust the uplink and downlink resource allocation ratio of the cell (base station) in the case of the actual downlink load of the system, thereby improving the service quality and spectrum utilization efficiency of the system, and improving the wireless communication system.
  • Embodiment 9 This embodiment provides a data transmission method.
  • Embodiment 8 combines Embodiment 8 and a preferred embodiment thereof.
  • one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load.
  • the cell BS-A base station
  • the uplink and downlink resource allocation ratio is mode B (3:5), then when the BS-A is to be uplinked, and/or the downlink has no data to be retransmitted, BS-A uses mode B for subsequent operations.
  • the uplink and/or downlink has no data to be retransmitted, which means that no data needs to be retransmitted during a specific transmission time interval, and the specific transmission time interval refers to the uplink and downlink resource allocation ratio of the communication node.
  • the transmission time interval affected by the retransmission timing is used when the synchronous HARQ data retransmission mode is used, for example, the fourth uplink subframe in mode A.
  • Embodiment 10 This embodiment provides a data transmission method. This embodiment combines Embodiment 1 and a preferred embodiment thereof.
  • one frame consists of several thousand subframes, which is assumed to be eight, and the initial uplink and downlink resource allocation ratio is mode A (4:4), due to the uplink and downlink load.
  • the cell BS-A base station
  • the cell BS-A decides to adjust the uplink and downlink resource allocation ratio to mode B (2:6), taking into account the influence of factors such as synchronous data retransmission, after BS-A decides L frames BS-A uses mode B for subsequent operations.
  • the BS-A allocates a new retransmission resource to transmit the data.
  • FIG. 6 is a first structural block diagram of a communication node according to an embodiment of the present invention. As shown in FIG. 6, the communication node includes: a sending module 62.
  • the obtaining module 64 and the first retransmission module 66 are described in detail below:
  • the sending module 62 is configured to: when the uplink and downlink resource allocation ratio is the first mode, send the first data to the second communication node in the first transmission time interval corresponding to the first mode; and the acquiring module 64 is configured to obtain the communication
  • the second retransmission module 66 is configured to retransmit the first data on the second transmission time interval when the uplink and downlink resource allocation ratio changes to the second mode.
  • FIG. 7 is a block diagram of a preferred first structure of a communication node according to an embodiment of the present invention. As shown in FIG.
  • the first retransmission module 66 includes: a retransmission submodule 662; a second retransmission module 72, below
  • the retransmission submodule 662 is configured to use the second communication node at the third transmission time interval.
  • the HARQ process number sends the second data to the second communication node with which the communication is located, and the communication node in which it is located retransmits the second data on the second transmission time interval, where the third transmission time interval is less than the second time interval, Retransmission of the first data is performed by using the process number of the first HARQ on the second transmission time interval, where the first HARQ process ID is different from the second HARQ.
  • the second retransmission module 72 is configured to retransmit the first data according to the HARQ timing relationship of the second mode when the second communication node with which the communication is not successfully received the data retransmitted by the communication node at the second transmission interval .
  • the present embodiment provides a communication node for implementing the above data transmission method.
  • the communication node includes: a determination module 82.
  • the transmission module 84 the above structure is described in detail below:
  • the determining module 82 is set to determine the condition that the node where it is located satisfies one of the following conditions: Condition 1: Uplink and/or downlink data not retransmitted Condition 2: When the uplink and/or the downlink have retransmitted data for transmission and determine a third predetermined time interval after the uplink and downlink resource allocation mode transition, wherein the third predetermined time interval is according to the uplink and downlink resources
  • the mode conversion retransmission timing of the allocation ratio is determined by the transmission time interval affected;
  • the transmission module 84 is connected to the determining module 82, and configured to perform data transmission using the fourth mode of the uplink and downlink resource allocation ratio when the determining module 82 satisfies the condition.
  • FIG. 9 is a block diagram of a preferred second structure of a communication node according to an embodiment of the present invention.
  • the communication node further includes: a data retransmission module 92.
  • the foregoing structure is described in detail:
  • the transmitting module 92 is configured to retransmit data using the allocated resources for the communication node in which it is located.
  • a data transmission method and a communication node are provided, and an effective data retransmission and an uplink and downlink resource allocation ratio conversion point selection method are used to improve the use efficiency of the frequency resource, and the entire wireless communication system is improved (for example, long-term evolution is adopted) Long Term Evolution (LTE), IEEE 802.16, Ultra Mobile Broadband (UMB), standard wireless communication systems such as electrical and electronic systems.
  • LTE Long Term Evolution
  • UMB Ultra Mobile Broadband
  • the computing device 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 steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module.
  • 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 scope of the present invention are intended to be included within the scope of the present invention.

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Abstract

本发明公开了数据传输方法及通信节点,该方法包括:在上下行资源分配比例为第一模式时,第一通信节点在第一模式对应的第一传输时间间隔上发送第一数据给第二通信节点;获取第一通信节点重传第一数据的第二传输时间间隔;在上下行资源分配比例变化为第二模式时,第一通信节点在第二传输时间间隔上进行第一数据的重传。通过本发明,提高了TDD系统数据传输可靠性及TDD系统的频谱利用率。

Description

数据传输方法及通信节点 技术领域 本发明涉及通信领域, 具体而言, 涉及一种数据传输方法及通信节点。 背景技术 无线通信系统中, 基站是指给终端提供服务的设备, 基站通过上下行链路 与终端进行通信, 其中, 下行链路(也称作前向链路)是指基站到终端的方向, 上行链路(也称作反向链路 )是指终端到基站的方向。 多个终端可同时通过上 行链路向基站发送数据, 也可以通过下行链路同时从基站接收数据。 时分双工 ( Time Division Duplex , 简称为 TDD ) 是现代通信系统常用的 一种双工方式, 用于分离接收与发送信道 (或上下行链路)。 在釆用时分双工 方式的无线通信系统中, 接收和发送使用同一频率载波的不同时隙作为信道的 承载, 用时间来保证接收与发送信道的分离。 由于时分双工方式中上下行信道 使用同样的频率, 上下行信道具有互易性, 从而使时分双工方式的移动通信系 统呈现出一定的独有特点, 例如频率配置的便捷性, 非对称业务的相对灵活性 和业务信道易于体现智能天线优势等。 随着釆用时分双工方式的小区上下行业务负载情况的变化, 一个或一组小 区需要自适应调整上下行资源分配比例以提升频谱利用效率, 这就对使用混合 自动重传 ( Hybrid Automatic Repeat Request, 简称为 HARQ ) 进行数据重传的 方式提出了> ^战, 特别是对同步 HARQ数据重传方式, 原因在于同步 HARQ 数据重传的时间点与上下行资源分配比例有关, 不同的资源分配比例会导致不 同的数据重传时间点。如图 1所示,一个小区初始的上下行资源分配比例为 4:4 (個—设一帧由 8个子帧组成, 上下行业务各占 4个子帧;), 当下行业务增加时, 该小区将上下行资源分配比例调整为 3:5 (假设一帧由 8个子帧组成, 上行业 务占 3个子帧, 下行业务占 5个子帧), 此时如果上下行资源分配比例调整前 第 4个上行子帧中需要进行同步 HARQ数据重传(在接下来帧中的第 4个上行 子帧), 由于新的上下行资源分配比例中没有第 4 个上行子帧, 就会导致终端 没有上行资源发送重传数据的情况发生, 当然也可能出现其它上行子帧中的重 传数据没有资源发送的情况,这依赖于同步 HARQ的时序关系计算时釆用的时 间单位和计算方法。 同理, 当上行业务增加时, 该小区将上下行资源分配比例 调整为 5:3 , 釆用下行同步 HARQ重传的一些子帧(如图 1 中第 4个下行子帧) 中也会出现类似于上行的情况发生, 目前还没有方法解决上述问题。需要说明, 釆用 HARQ方式重传的数据包可以遵循递增冗余或追赶合并的方式来实现。 综上所述, 相关技术中由于上下行资源分配比例的模式发生变化导致变化 后重传数据没有传输资源可以传输导致数据传输可靠性比较差。 发明内容 本发明的其它特征和优点将在随后的说明书中阐述, 并且, 部分地从说明 书中变得显而易见, 或者通过实施本发明而了解。 本发明的目的和其他优点可 通过在所写的说明书、 权利要求书、 以及附图中所特别指出的结构来实现和获 得。 本发明的主要目的在于提供数据传输方法及通信节点, 以解决相关技术中 由于上下行资源分配比例的模式发生变化导致变化后重传数据没有传输资源 可以传输导致数据传输可靠性比较差的问题。 为了实现上述目的, 根据本发明的一个方面, 提供了一种数据传输方法, 应用于时分双工 (TDD ) 系统中。 根据本发明的数据传输方法包括: 在上下行资源分配比例为第一模式时, 第一通信节点在第一模式对应的第一传输时间间隔上发送第一数据给第二通 信节点; 获取第一通信节点重传第一数据的第二传输时间间隔; 在上下行资源 分配比例变化为第二模式时, 第一通信节点在第二传输时间间隔上进行第一数 据的重传。 获取第一通信节点重新传输数据的第二传输时间间隔包括: 通过以下方式 之一获取第一通信节点重新传输数据的第二传输时间间隔: 系统缺省配置; 第 一通信节点或第二通信节点中的主控节点确定。 在获取第一通信节点重新传输数据的第二传输时间间隔之后, 还包括: 第 一通信节点为主控节点, 第二通信节点为受控节点, 第一通信节点将第二传输 时间间隔发送给第二通信节点; 或第一通信节点为受控节点, 第二通信节点为 主控节点, 第二通信节点将第二传输时间间隔发送给第一通信节点。 上述方法还包括: 在第一通信节点在第三传输时间间隔上使用第二 HARQ 进程号发送第二数据给第二通信节点, 且第一通信节点在第二传输时间间隔上 重新传输第二数据, 其中, 第三传输时间间隔小于第二时间间隔, 在上下行资 源分配比例变化为第二模式时, 第一通信节点在第二传输时间间隔上进行第一 数据的重传包括:第一通信节点在第二传输时间间隔上使用第一 HARQ的进程 号进行第一数据的重传, 其中第一 HARQ进程号与第二 HARQ不同。 在第一通信节点在第二传输时间间隔上进行第一数据的重传之后, 还包 括: 当第二通信节点未能成功接收第一通信节点在第二传输间隔重传的数据, 则第一通信节点按照第二模式的 HARQ的定时关系重传第一数据。 第一传输时间间隔与第四时间间隔不同, 其中, 第四时间间隔为上下行资 源分配比例从第一模式转换为第二模式时, 重传时序受到影响的时间间隔。 为了实现上述目的, 根据本发明的另一方面, 提供了一种数据传输方法, 应用于时分双工 (TDD ) 系统中。 根据本发明的数据传输方法包括: 第三通信节点确定满足其以下之一的条 件: 条件 1 : 上行链路和 /或下行链路没有重传的数据进行传输; 条件 2: 上行 链路和 /或下行链路有重传的数据进行传输且确定进行上下行资源分配模式转 换之后的第三预定时间间隔, 其中, 第三预定时间间隔根据上下行资源分配比 例的模式转换重传时序受到影响的传输时间间隔确定; 第三通信节点使用上下 行资源分配比例的第四模式进行数据传输。 上行链路和 /或下行链路没有重传的数据进行传输包括: 上行链路和 /或下 行链路在第四预定时间间隔没有重传的数据进行传输, 其中, 第四预定时间间 隔才艮据上下行资源分配比例的模式转换重传时序受到影响的传输时间间隔确 定。 在第三通信节点使用上下行资源分配比例的第四模式进行数据传输之后, 还包括: 第三通信节点分配资源重传数据。 为了实现上述目的, 根据本发明的再一方面, 提供了一种通信节点。 根据本发明的通信节点包括: 发送模块, 设置为在上下行资源分配比例为 第一模式时, 在第一模式对应的第一传输时间间隔上发送第一数据给第二通信 节点; 获取模块, 设置为获取其所在通信节点重传第一数据的第二传输时间间 隔; 第一重传模块, 设置为在上下行资源分配比例变化为第二模式时, 在第二 传输时间间隔上进行第一数据的重传。 第一重传模块包括: 重传子模块, 设置为在第一通信节点在第三传输时间 间隔上使用第二 HARQ进程号发送第二数据给与其通信的第二通信节点,且其 所在的通信节点在第二传输时间间隔上重新传输第二数据, 其中, 第三传输时 间间隔小于第二时间间隔时,在第二传输时间间隔上使用第一 HARQ的进程号 进行第一数据的重传, 其中第一 HARQ进程号与第二 HARQ不同。 上述通信节点还包括: 第二重传模块, 设置为当与其通信的第二通信节点 未能成功接收到其所在通信节点在第二传输间隔重传的数据, 按照第二模式的 HARQ的定时关系重传第一数据。 为了实现上述目的, 根据本发明的又一方面, 提供了一种通信节点。 根据本发明的通信节点包括: 确定模块, 设置为确定其所在节点满足其以 下之一的条件: 条件 1 : 上行链路和 /或下行链路没有重传的数据进行传输; 条 件 2: 上行链路和 /或下行链路有重传的数据进行传输且确定进行上下行资源分 配模式转换之后的第三预定时间间隔, 其中, 第三预定时间间隔根据上下行资 源分配比例的模式转换重传时序受到影响的传输时间间隔确定; 传输模块, 设 置为使用上下行资源分配比例的第四模式进行数据传输。 上述方法还包括: 数据重传模块, 设置为其所在的通信节点使用分配资源 重传数据。 通过本发明, 釆用在上下行资源分配比例的模式发生变化时, 确定第一通 信节点重传第一数据的新的传输时间间隔并在新的传输时间间隔上重传数据, 解决了相关技术中 TDD 系统在上下行资源分配比例模式变换后导致重传数据 出错, 导致 TDD系统数据传输可靠性比较差的问题, 进而达到了提高 TDD系 统数据传输可靠性及 TDD系统的频谱利用率的效果。 附图说明 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: 图 1是根据相关技术的上下行资源分配比例发生变化时受影响子帧的示意 图; 图 2是根据本发明实施例的数据传输的第一流程图; 图 3是根据本发明实施例的数据传输的第二流程图; 图 4是才艮据本发明实施例的釆用时分双工方式的通信节点在上下行资源分 配比例发生变化时利用同步 HARQ数据重传方式进行数据传输的流程图; 图 5是才艮据本发明实施例的釆用时分双工方式的通信节点在上下行资源分 配比例发生变化时进行数据传输的流程图; 图 6是 居本发明实施例的通信节点的第一结构框图; 图 7是 居本发明实施例的通信节点的优选的第一结构框图; 图 8是 居本发明实施例的通信节点的第二结构框图; 以及 图 9是 居本发明实施例的通信节点的优选的第二结构框图。 具体实施方式 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。 本实施例提供了一种数据传输方法, 应用于时分双工 (TDD ) 系统中, 图 2是根据本发明实施例的数据传输的第一流程图, 如图 2所示, 该方法包括: 步骤 S202: 在上下行资源分配比例为第一模式时, 第一通信节点在第一模 式对应的第一传输时间间隔上发送第一数据给第二通信节点; 步骤 S204: 获取第一通信节点重传第一数据的第二传输时间间隔; 步骤 S206: 在上下行资源分配比例变化为第二模式时, 第一通信节点在第 二传输时间间隔上进行第一数据的重传。 通过上述步骤, 在上下行资源分配比例的模式发生变化时, 确定第一通信 节点重传第一数据的新的传输时间间隔并在新的传输时间间隔上重传数据, 克 服了相关技术中由于上下行资源分配比例的模式发生变化导致变化后重传数 据没有传输资源可以传输导致数据传输可靠性比较差的问题, 提高了 TDD 系 统数据传输可靠性及 TDD系统的频谱利用率。 优选地, 步 4聚 S204 包括: 通过以下方式之一获取第一通信节点重新传输 数据的第二传输时间间隔: 系统缺省配置; 第一通信节点或第二通信节点中的 主控节点确定。通过该优选实施例,对第二传输时间间隔可以灵活地进行配置, 减低了系统复杂度。 优选地, 在步骤 S204之后, 还包括: 第一通信节点为主控节点, 第二通 信节点为受控节点, 第一通信节点将第二传输时间间隔发送给第二通信节点; 或第一通信节点为受控节点, 第二通信节点为主控节点, 第二通信节点将第二 传输时间间隔发送给第一通信节点。 通过该优选实施例, 主控节点将确定的传 输时间间隔发送给与其通信的节点, 提高了第二传输时间间隔传输的可靠性。 优选地,在第一通信节点在第三传输时间间隔上使用第二 HARQ进程号发 送第二数据给第二通信节点, 且第一通信节点在第二传输时间间隔上重新传输 第二数据, 其中, 第三传输时间间隔小于第二时间间隔, 下面对步骤 S206 的 一个优选的实施方式进行说明。 第一通信节点在第二传输时间间隔上使用第一 HARQ的进程号进行第一数据的重传, 其中第一 HARQ进程号与第二 HARQ 不同。 通过该优选实施例, 通过不同的 HARQ进程号来区分重传的不同数据 , 提高了通信节点接收重传数据的准确性。 优选地, 在步骤 S206之后, 还包括: 当第二通信节点未能成功接收第一 通信节点在第二传输间隔重传的数据, 则第一通信节点按照第二模式的 HARQ 的定时关系重传第一数据。 通过该优选实施例, 在转换为第二模式后, 釆用对 应于该模式的新的定时关系重传第一数据, 提高了系统传输数据的可靠性及稳 定性。 优选地, 第一传输时间间隔与第四时间间隔不同, 其中, 第四时间间隔为 上下行资源分配比例从第一模式转换为第二模式时, 重传时序受到影响的时间 间隔。 通过该优选实施例, 确定第一传输时间间隔和重传时序受到影响的时间 间隔不同, 提高了系统传输数据的可靠性。 本实施例提高了一种数据传输方法, 应用于时分双工 (TDD ) 系统中, 图 3是根据本发明实施例的数据传输的第二流程图, 如图 3所示, 该方法包括: 步骤 S302: 第三通信节点确定满足其以下之一的条件: 条件 1 : 上行链路和 /或下行链路没有重传的数据进行传输; 条件 2: 上行链路和 /或下行链路有重传的数据进行传输且确定进行上下行 资源分配模式转换之后的第三预定时间间隔, 其中, 第三预定时间间隔根据上 下行资源分配比例的模式转换重传时序受到影响的传输时间间隔确定。 步骤 S304:第三通信节点使用上下行资源分配比例的第四模式进行数据传 输。 优选地, 条件 1中上行链路和 /或下行链路没有重传的数据进行传输包括: 上行链路和 /或下行链路在第四预定时间间隔没有重传的数据进行传输, 其中 , 第四预定时间间隔根据上下行资源分配比例的模式转换重传时序受到影响的 传输时间间隔确定。 通过该优选实施例, 通信节点确定在第四预定时间间隔内 没有重传的数据进行传输, 保证了上下行资源分配模式转换后重传数据的可靠 性。 优选的, 在步骤 S304之后, 还包括: 第三通信节点分配资源重传数据。 通过该优选实施例, 第三通信节点在分配资源对需要重传的数据分配新的资源 进行传输, 提高了 TDD系统数据传输的可靠性和准确性。 实施例一 本实施例提供了一种数据传输方法, 本实施例结合了上述实施例及其中的 优选实施方式。 图 4是 居本发明实施例的釆用时分双工方式的通信节点在上 下行资源分配比例发生变化时利用同步 HARQ 数据重传方式进行数据传输的 流程图, 如图 4所示, 该方法包括: 步骤 S402: 上下行资源分配比例为模式 A时, 第一通信节点在第一传输 时间间隔上使用第一资源发送数据给第二通信节点。 步骤 S404: 上下行资源分配比例变化为模式 B后, 第一通信节点需要在 第二传输时间间隔上使用第二资源重传数据给第二通信节点, 其中, 第一传输 时间间隔和第二传输时间间隔的定时关系可以是缺省配置的, 或动态调整的。 优选地, 上述第一资源与第二资源可以相同。 优选地, 当第一通信节点为进行资源分配的主控节点, 第二通信节点为受 控节点, 或第二通信节点为进行资源分配的主控节点, 第一通信节点为受控节 点时,主控节点在上下行资源分配比例转化为模式 B前通知受控节点第一传输 时间间隔和第二传输时间间隔的定时关系,和 /或通知受控节点发送或接收数据 所使用的第二资源。 优选地,第一传输时间间隔与第二传输时间间隔的定时关系依赖于模式 A、 和 /或模式 B。 优选地, 当第一通信节点在第三传输时间间隔上发送数据给第二通信节 点, 且第一通信节点需要在第二传输时间间隔上重传数据给第二通信节点, 其 中, 第三传输时间间隔在时间上提前于第二传输和时间间隔, 则第一通信节点 在第一传输时间间隔和第三传输时间间隔上使用的 HARQ进程号是不同的。通 过该优选实施例, 提高了重传数据的准确性。 优选地, 当第二通信节点未能成功接收第一通信节点在第二传输时间间隔 重传的数据, 则第一通信节点按照模式 B规定的定时关系继续重传数据。 优选地,第一传输间隔不同于通信节点的上下行资源分配比例从模式 A转 换为模式 B后, 重传时序受到影响的传输时间间隔。 优选地, 当第一通信节点或第二通信节点为进行资源分配的主控节点时, 主控节点从模式 A转换为模式 B前的长度为 L的时间区域内不向第一通信节 点分配重传时序受到影响的传输时间间隔。 实施例二 本实施例提供了一种数据传输方法, 本实施例结合了实施例一及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 将上下行资源分配比例调整为模 式 B(3:5)。 以 BS-A为服务基站的终端 MS-A在第 i帧 (在该帧中 BS-A釆用模式 A ) 的第 4个上行子帧上通过资源块 RB-A发送数据且未被 BS-A成功接收, 则按 照模式 A的要求, 同步 HARQ重传的时序关系 MS-A需要在第( i + 1 )帧的第 4个上行子帧上重传该数据。如果在第( i + 1 )帧 BS-A釆用模式 B, 则第( i+1 ) 帧中不存在第 4个上行子帧, 此时 MS-A按照系统缺省配置或标准缺省配置的 模式 A转换为模式 B的时序关系在第( i + 1 )帧上的第 3个上行子帧上通过资 源块 RB-A重传该数据。 优选地, BS-A可通过资源分配信令通知 MS-A在第 (i + 1 ) 帧上的第 3 个上行子帧上使用不同于资源块 RB-A的资源块 RB-B重传该数据,此时 BS-A 需要通过资源分配信令通知 MS-A与资源块 RB-B有关的信息(例如起始位置, 资源块的大小等)。 实施例三 本实施例提供了一种数据传输方法, 本实施例结合了实施例一及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 将上下行资源分配比例调整为模 式 B(2:6)。 以 BS-A为服务基站的终端 MS-A在第 i帧 (在该帧中 BS-A釆用模式 A ) 的第 2个上行子帧上通过资源块 RB-A发送数据且未被 BS-A成功接收, 则按 照模式 A的要求, 同步 HARQ重传的时序关系 MS-A需要在第( i + 1 )帧的第 六个子帧上重传该数据。 如果在第 ( i + 1 ) 帧 BS-A釆用模式 B, 则第 ( i+1 ) 帧中第 6个子帧为下行子帧, 此时 MS-A才艮据 BS-A在第 (i + 1 ) 帧上通过资 源分配信令得到的重传资源上重传该数据。 例如 BS-A分配该帧上第一个上行 子帧的资源块 RB-B让 MS-A重传该数据, 或者配置该帧上第一个上行子帧的 资源块 RB-B用于 MS-A重传该数据, 即这种情况下同步 HARQ的定时关系是 可以动态调整的。 需要说明的是, 资源块 RB-A、 RB-B在子帧中位置、 和 /或大小可以相同, 也可以不同。 实施例四 本实施例提供了一种数据传输方法, 本实施例结合了实施例一及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 将上下行资源分配比例调整为模 式 B(3:5)。 以 BS-A为月艮务基站的终端 MS-A, 在第 i帧和第 i帧之前釆用模式 A, 在 第 (i + 1 ) 帧开始后釆用模式 B , 则 BS-A在第 i帧或第 i帧之前的帧中提前为 MS-A分配可能在第 ( i + 1 )帧或该帧之后的帧上使用的重传资源, 如果 MS-A 需要在第 (i + 1 ) 帧或该帧之后的帧上进行同步 HARQ数据重传, 则使用该重 传资源, 否则, BS-A可将该资源分配给其它用户使用。 实施例五 本实施例提供了一种数据传输方法, 本实施例结合了实施例一及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 将上下行资源分配比例调整为模 式 B(2:6)。 以 BS-A为月艮务基站的终端 MS-A, 在第 i帧和第 i帧之前釆用模式 A, 在 第 (i + 1 ) 帧开始后釆用模式 B , 则 BS-A在第 i帧或第 i帧之前的帧中通知 MS-A从模式 A转换模式 B后同步 HARQ的定时关系, 如果 MS-A需要在第 ( i + 1 ) 帧中进行数据重传, 则使用该定时关系。 实施例六 本实施例提供了一种数据传输方法, 本实施例结合了实施例一及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 将上下行资源分配比例调整为模 式 B(3:5)。 以 BS-A为服务基站的终端 MS-A,在第 i帧(在该帧中 BS-A釆用模式 A ) 的第 4个上行子帧上发送数据 DT-A, 且未被 BS-A成功接收, 则按照模式 A 的要求, 同步 HARQ重传的时序关系 MS-A需要在第 ( i + 1 ) 帧的第 4个上行 子帧上重传该数据, 如果在第 (i + 1 ) 帧 BS-A釆用模式 B, 则第 (i+1 ) 帧中 不存在第 4个上行子帧, 此时 MS-A按照系统缺省配置、 或标准缺省配置、 或 动态配置的模式 A转换为模式 B的时序关系在第( i + 1 )帧的第 3个上行子帧 上通过资源块 RB-A重传该数据。 需要说明的是, 如果 MS-A在第 i帧上的第 3个上行子帧上发送数据 DT-B, 且未被 BS-A成功接收, 且 MS-A按照规定的 时序关系在第(i + 1 )帧的第 3个上行子帧上进行数据重传, BS-A需要调度确 保 MS-A在该子帧上针对这两种数据重传釆用的进程号是不同的, 否则会造成 BS-A无法判断 MS-A重传的 DT-B还是 DT-A的数据情况, 特别是在重传资源 发生变化的情况下。 实施例七 本实施例提供了一种数据传输方法, 本实施例结合了实施例一及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 将上下行资源分配比例调整为模 式 B(2:6)。 假设从模式 A转换为模式 B后, 模式 A中重传时序受到影响的上行子帧 为第 3个上行子帧、 第 4个上行子帧, 且从第 (i + 1 ) 帧开始转换为模式 B , 则 BS-A在第 ( i + 1 ) 帧之前的 L个帧中不为终端 MS-A分配相关受影响上行 子帧的资源。 实施例八 本实施例提供了一种数据传输方法, 本实施例结合了上述实施例及其中的 优选实施方式。 本发明实施例通过选取上下行资源分配比例发生变化时的时间 点来进行数据传输。 图 5是根据本发明实施例的釆用时分双工方式的通信节点 在上下行资源分配比例发生变化时进行数据传输的流程图, 如图 5所示, 该方 法包括: 步骤 S502: 确定上下行资源分配比例为模式 A的通信节点在上行链路、 和 /或下行链路没有数据需要重传时, 或通信节点决定从模式 A转换为模式 B 后的长度为 L的时间间隔后; 步骤 S504: 通信节点釆用的上下行资源分配比例转换为模式 B。 优选地, 步骤 S502中上行链路和 /或下行链路没有数据需要重传是指在特 定传输时间间隔上没有数据需要重传。 优选地, 特定传输时间间隔是指通信节点的上下行资源分配比例从模式 A 转换为模式 B后, 釆用同步 HARQ数据重传方式时重传时序受到影响的传输 时间间隔。 优选地, 步骤 S504之后, 通信节点为需要重传的数据分配新的资源。 通过实施例一和实施例二, 无线通信系统可以系统实际上下行负载的情况 动态调整小区 (基站) 的上下行资源分配比例, 从而改善系统的服务质量和频 谱利用效率, 提高了无线通信系统对实际环境的适应性。 实施例九 本实施例提供了一种数据传输方法, 本实施例结合了实施例八及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 计划将上下行资源分配比例调整 为模式 B(3:5),则 BS-A待上行链路、和 /或下行链路没有数据需要重传时, BS-A 釆用模式 B进行后续操作。 优选地,该上行链路和 /或下行链路没有数据需要重传是指在特定传输时间 间隔上没有数据需要重传, 该特定传输时间间隔是指该通信节点的上下行资源 分配比例从模式 A转换为模式 B后, 釆用同步 HARQ数据重传方式时重传时 序受到影响的传输时间间隔, 例如模式 A中的第 4个上行子帧。 实施例十 本实施例提供了一种数据传输方法, 本实施例结合了实施例一及其中的优 选实施方式。 本实施例在时分双工方式的无线通信系统中, 其中, 一帧由若千 个子帧组成, 假设为 8个, 初始的上下行资源分配比例为模式 A ( 4:4 ), 由于 上下行负载情况的变化, 小区 BS-A (基站) 决定将上下行资源分配比例调整 为模式 B(2:6), 考虑到同步数据重传等因素的影响, 在 BS-A做出决定 L个帧 后, BS-A釆用模式 B进行后续操作。 优选地, 如果 BS-A转换模式 B后, 之前的上行或下行数据还需要进行重 传, 则 BS-A分配新的重传资源传输这些数据。 需要说明的是, 虽然实施例一到实施例十是以上行链路的数据传输为例进 行的描述, 考虑到下行链路的数据传输方法同上行链路的数据传输方法类似, 所以本申请的数据传输方法同样适用于下行链路, 在此不再赞述。 本实施例提供了一种通信节点, 用以实现上述的数据传输方法, 图 6是根 据本发明实施例的通信节点的第一结构框图, 如图 6所示, 该通信节点包括: 发送模块 62 ,获取模块 64和第一重传模块 66 ,下面对上述结构进行详细描述: 发送模块 62 , 设置为在上下行资源分配比例为第一模式时, 在第一模式对 应的第一传输时间间隔上发送第一数据给第二通信节点; 获取模块 64 ,设置为获取其所在通信节点重传第一数据的第二传输时间间 隔; 第一重传模块 66 , 设置为在上下行资源分配比例变化为第二模式时, 在第 二传输时间间隔上进行第一数据的重传。 图 7是才艮据本发明实施例的通信节点的优选的第一结构框图,如图 7所示, 第一重传模块 66 包括: 重传子模块 662 ; 第二重传模块 72 , 下面对上述结构 进行详细描述: 重传子模块 662 , 设置为在第一通信节点在第三传输时间间隔上使用第二
HARQ进程号发送第二数据给与其通信的第二通信节点, 且其所在的通信节点 在第二传输时间间隔上重新传输第二数据, 其中, 第三传输时间间隔小于第二 时间间隔时,在第二传输时间间隔上使用第一 HARQ的进程号进行第一数据的 重传, 其中第一 HARQ进程号与第二 HARQ不同。 第二重传模块 72 ,设置为当与其通信的第二通信节点未能成功接收到其所 在通信节点在第二传输间隔重传的数据,按照第二模式的 HARQ的定时关系重 传第一数据。 本实施例提供了一种通信节点, 用于实现上述的数据传输方法, 图 8是根 据本发明实施例的通信节点的第二结构框图, 如图 8所示, 该通信节点包括: 确定模块 82和传输模块 84 , 下面对上述结构进行详细描述: 确定模块 82 , 设置为确定其所在节点满足其以下之一的条件: 条件 1 : 上行链路和 /或下行链路没有重传的数据进行传输; 条件 2: 上行链路和 /或下行链路有重传的数据进行传输且确定进行上下行 资源分配模式转换之后的第三预定时间间隔时, 其中, 第三预定时间间隔根据 上下行资源分配比例的模式转换重传时序受到影响的传输时间间隔确定; 传输模块 84 , 连接至确定模块 82 , 用于在确定模块 82满足条件时使用上 下行资源分配比例的第四模式进行数据传输。 图 9是才艮据本发明实施例的通信节点的优选的第二结构框图,如图 9所示, 该通信节点还包括: 数据重传模块 92 , 下面对上述结构进行详细描述: 数据重传模块 92, 设置为其所在的通信节点使用分配资源重传数据。 通过上述实施例, 提供了数据传输方法及通信节点, 通过有效的数据重传 及上下行资源分配比例转换点选择方法以改善频率资源的使用效率, 提高整个 无线通信系统(例如釆用长期演进 ( Long Term Evolution, 简称为 LTE ), IEEE 802.16、 超级移动宽带 (Ultra Mobile Broadband, 简称为 UMB )、 电气和电子 等标准的无线通信系统) 的性能。 ^ 、 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。 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 ^"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。

Claims

权 利 要 求 书
1. 一种数据传输方法, 应用于时分双工 TDD系统中, 包括:
在上下行资源分配比例为第一模式时, 第一通信节点在所述第一模 式对应的第一传输时间间隔上发送第一数据给第二通信节点;
获取所述第一通信节点重传所述第一数据的第二传输时间间隔; 在所述上下行资源分配比例变化为第二模式时, 所述第一通信节点 在所述第二传输时间间隔上进行所述第一数据的重传。
2. 根据权利要求 1所述的方法, 其中, 获取第一通信节点重新传输所述数 据的第二传输时间间隔包括: 通过以下方式之一获取第一通信节点重新传输所述数据的第二传输 时间间隔:
系统缺省配置;
所述第一通信节点或所述第二通信节点中的主控节点确定。
3. 根据权利要求 1所述的方法, 其中, 在获取第一通信节点重新传输所述 数据的第二传输时间间隔之后, 还包括:
所述第一通信节点为主控节点, 所述第二通信节点为受控节点, 所 述第一通信节点将所述第二传输时间间隔发送给所述第二通信节点; 或 所述第一通信节点为受控节点, 所述第二通信节点为主控节点, 所 述第二通信节点将所述第二传输时间间隔发送给所述第一通信节点。
4. 根据权利要求 1所述的方法, 其中, 还包括: 在所述第一通信节点在第 三传输时间间隔上使用第二 HARQ进程号发送第二数据给所述第二通信 节点, 且所述第一通信节点在所述第二传输时间间隔上重新传输所述第 二数据, 其中, 所述第三传输时间间隔小于所述第二时间间隔, 在所述 上下行资源分配比例变化为第二模式时, 所述第一通信节点在所述第二 传输时间间隔上进行所述第一数据的重传包括:
所述第一通信节点在所述第二传输时间间隔上使用第一 HARQ的进 程号进行所述第一数据的重传, 其中所述第一 HARQ进程号与所述第二 HARQ不同。
5. 根据权利要求 1所述的方法, 其中, 在所述第一通信节点在所述第二传 输时间间隔上进行所述第一数据的重传之后, 还包括:
当所述第二通信节点未能成功接收所述第一通信节点在所述第二传 输间隔重传的所述数据, 则所述第一通信节点按照所述第二模式的所述 HARQ的定时关系重传所述第一数据。
6. 根据权利要求 1至 5任一项所述的方法, 其中,
所述第一传输时间间隔与第四时间间隔不同, 其中, 所述第四时间 间隔为所述上下行资源分配比例从第一模式转换为第二模式时, 重传时 序受到影响的时间间隔。
7. —种数据传输方法, 应用于时分双工 TDD系统中, 包括:
第三通信节点确定满足其以下之一的条件:
条件 1 : 上行链路和 /或下行链路没有重传的数据进行传输; 条件 2: 上行链路和 /或下行链路有重传的数据进行传输且确定进行 上下行资源分配模式转换之后的第三预定时间间隔, 其中, 所述第三预 定时间间隔根据所述上下行资源分配比例的模式转换重传时序受到影响 的传输时间间隔确定;
所述第三通信节点使用上下行资源分配比例的第四模式进行数据传 输。
8. 根据权利要求 7所述的方法, 其中, 上行链路和 /或下行链路没有重传的 数据进行传输包括:
上行链路和 /或下行链路在第四预定时间间隔没有重传的数据进行 传输, 其中, 所述第四预定时间间隔根据所述上下行资源分配比例的模 式转换重传时序受到影响的传输时间间隔确定。
9. 根据权利要求 7所述的方法, 其中, 在所述第三通信节点使用上下行资 源分配比例的第四模式进行数据传输之后, 还包括: 所述第三通信节点 分配资源重传所述数据。
10. —种通信节点, 包括:
发送模块, 设置为在上下行资源分配比例为第一模式时, 在所述第 一模式对应的第一传输时间间隔上发送第一数据给第二通信节点; 获取模块, 设置为获取其所在通信节点重传所述第一数据的第二传 输时间间隔;
第一重传模块, 设置为在所述上下行资源分配比例变化为第二模式 时, 在所述第二传输时间间隔上进行所述第一数据的重传。
11. 根据权利要求 10所述的通信节点, 其中, 所述第一重传模块包括: 重传子模块, 设置为在所述第一通信节点在第三传输时间间隔上使 用第二 HARQ进程号发送第二数据给与其通信的第二通信节点,且其所 在的通信节点在所述第二传输时间间隔上重新传输所述第二数据,其中, 所述第三传输时间间隔小于所述第二时间间隔时, 在所述第二传输时间 间隔上使用第一 HARQ的进程号进行所述第一数据的重传, 其中所述第 一 HARQ进程号与所述第二 HARQ不同。
12. 根据权利要求 10所述的通信节点, 其特征在于, 还包括:
第二重传模块, 设置为当与其通信的第二通信节点未能成功接收到 其所在通信节点在所述第二传输间隔重传的所述数据, 按照所述第二模 式的所述 HARQ的定时关系重传所述第一数据。
13. 一种通信节点, 其特征在于, 包括:
确定模块, 设置为确定其所在节点满足其以下之一的条件: 条件 1 : 上行链路和 /或下行链路没有重传的数据进行传输; 条件 2: 上行链路和 /或下行链路有重传的数据进行传输且确定进行 上下行资源分配模式转换之后的第三预定时间间隔, 其中, 所述第三预 定时间间隔根据所述上下行资源分配比例的模式转换重传时序受到影响 的传输时间间隔确定;
传输模块, 设置为使用上下行资源分配比例的第四模式进行数据传 输。
14. 根据权利要求 13所述的通信节点, 其特征在于, 还包括:
数据重传模块, 设置为其所在的通信节点使用分配资源重传数据。
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