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Data transmission method and communication node

A data transmission method and communication node technology, which is applied in the field of data transmission methods and communication nodes, can solve the problems of no retransmission data, poor reliability of data transmission, etc., and achieve the effect of improving reliability

Active Publication Date: 2014-10-22
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

[0055] 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:

[0056] 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.

[0057] 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

[0066] 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 , cell BS-A (base station) adjusts the uplink and downlink resource allocation ratio to mode B (3:5).

[0067] 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 After 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 If mode B is adopted,...

Embodiment 3

[0070] 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 (2:6).

[0071]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 After 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) frame, if BS-A adopts the mode in the (i+1) frame B, then the 6...

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Abstract

A data transmission method and a communication point are disclosed in the invention. The method includes the following steps: when the distribution proportion between an uplink and a downlink resource is a first mode, a first communication point sends a first data to a second communication point at a first transmission time interval corresponding to the first mode; a second transmission time for retransmitting the first data by the first communication point is obtained; when the distribution proportion between the uplink and the downlink resource becomes a second mode, the retransmission of the first data is performed at a second transmission time interval by the first communication point. With the invention, the transmission reliability of the Time Division Duplex (TDD) system data and the frequency utilization rate of TDD system are increased.

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 the 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, which is used to separate receiving and sending channels (or uplink and downlink). In the wireless communi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18
CPCH04L1/1887
Inventor 鲁照华陈宪明刘锟罗薇李卫敏
Owner ZTE CORP