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Data transmission method and communication node

A data transmission method and communication node technology, applied in the field of data transmission methods and communication nodes, can solve the problems of poor data transmission reliability and no retransmission data, and achieve the effect of improving the reliability and efficiency of TDD system data transmission

Active Publication Date: 2018-03-13
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a data transmission method and a communication node to solve the problem in the related art that due to the change in the allocation ratio of uplink and downlink resources, there is no transmission resource for the retransmitted data after the change, resulting in relatively poor data transmission reliability.

Method used

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  • Data transmission method and communication node
  • Data transmission method and communication node
  • Data transmission method and communication node

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment provides a data transmission method, and this embodiment combines the foregoing embodiments and preferred implementation manners therein. Figure 4 It is a flow chart of data transmission using a synchronous HARQ data retransmission mode when the uplink and downlink resource allocation ratio of a communication node adopting a time division duplex mode changes according to an embodiment of the present invention, as shown in Figure 4 As shown, the method includes:

[0045] Step S402: When the allocation ratio of uplink and downlink resources is mode A, the first communication node uses the first resource to send data to the second communication node in the first transmission time interval.

[0046] Step S404: After the uplink and downlink resource allocation ratio changes to mode B, the first communication node needs to use the second resource to retransmit data to the second communication node at the second transmission time interval, wherein the first t...

Embodiment 2

[0055] This embodiment provides a data transmission method, and this embodiment combines Embodiment 1 and preferred implementation manners therein. In this embodiment, in a time division duplex wireless communication system, one frame is composed of several subframes, assuming 8 subframes, and the initial uplink and downlink resource allocation ratio is mode A (4:4). Due to the uplink and downlink load conditions , the cell BS-A (base station) adjusts the uplink and downlink resource allocation ratio to mode B (3:5).

[0056] The terminal MS-A with BS-A as the serving base station sends data through the resource block RB-A on the fourth uplink subframe of the i-th frame (in which BS-A adopts mode A) and is not used by BS-A Successful reception, according to the requirements of mode A, the timing relationship of synchronous HARQ retransmission MS-A needs to retransmit the data on the fourth uplink subframe of the (i+1)th frame, if the (i+1)th Frame BS-A adopts mode B, then the...

Embodiment 3

[0059] This embodiment provides a data transmission method, and this embodiment combines Embodiment 1 and preferred implementation manners therein. In this embodiment, in a time division duplex wireless communication system, one frame is composed of several subframes, assuming 8 subframes, and the initial uplink and downlink resource allocation ratio is mode A (4:4). Due to the uplink and downlink load conditions , the cell BS-A (base station) adjusts the allocation ratio of uplink and downlink resources to mode B (2:6).

[0060] The terminal MS-A with BS-A as the serving base station sends data through the resource block RB-A on the second uplink subframe of the i-th frame (in which BS-A adopts mode A) and is not used by BS-A Successful reception, according to the requirements of mode A, the timing relationship of synchronous HARQ retransmission MS-A needs to retransmit the data on the sixth subframe of the (i+1)th frame, if the BS in the (i+1)th frame -A adopts mode B, then...

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Abstract

The invention discloses a data transmission method and communication nodes. The method comprises the steps that the third communication node is determined to meet one of the following conditions: according to the first condition, an uplink and / or a downlink are / is not provided with retransmission data for transmission; according to the second condition, the uplink and / or downlink is provided with retransmission data for transmission, and a third preset time interval formed after uplink and downlink resource distribution mode conversion is determined, wherein the third preset time interval converts the affected transmission time interval of a retransmission time sequence according to the uplink and downlink resource distribution proportion mode; the third communication node uses a fourth mode of the uplink and downlink resource distribution proportion for performing data transmission. According to the method, data transmission reliability of a TDD system and the frequency spectrum utilization rate of the TDD system are improved.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a data transmission method and a communication node. Background technique [0002] In a wireless communication system, a base station refers to a device that provides services to a terminal. The base station communicates with the terminal through the uplink and downlink. The downlink (also called the forward link) refers to the direction from the base station to the terminal, and the uplink The road (also called reverse link) refers to the direction from the terminal to the base station. Multiple terminals can simultaneously send data to the base station through the uplink, and can also receive data from the base station through the downlink at the same time. [0003] Time Division Duplex (TDD for short) is a duplex mode commonly used in modern communication systems, and is used to separate receiving and transmitting channels (or uplink and downlink). In the wireless communic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
Inventor 鲁照华陈宪明刘锟罗薇李卫敏
Owner ZTE CORP