Data transmission method and device

A data transmission method and data transmission technology, which are applied in the field of data transmission methods and devices, can solve the problems of low data transmission efficiency, data transmission can not meet the business volume of up and down, and achieve the effect of improving data transmission efficiency

Inactive Publication Date: 2017-05-10
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The main purpose of the present invention is to provide a data transmission method and device to at least solve the problem in the above-mentioned related technologies that the data transmission cannot meet the changes of the up and down business volume, resulting in relatively low data transmission efficiency

Method used

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  • Data transmission method and device

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0047] This embodiment provides a data transmission method, and this embodiment combines the foregoing embodiments and preferred implementation manners therein.

[0048] The method comprises the steps of:

[0049] Step 1: Divide a wireless frame, and a divided wireless frame includes: fixed downlink subframes, special subframes, fixed uplink subframes, and dynamic subframes. Wherein, the special subframe includes DwPTS, GP, and UpPTS. The dynamic subframe transmits an uplink signal or a downlink signal or does not transmit any signal.

[0050] Step 2: The base station notifies one or more or all terminals in the cell on the fixed downlink subframe or dynamic subframe preceding the dynamic subframe that the dynamic subframe is used to transmit uplink signals or downlink signals or not transmit any signals. The notification can be explicit or implicit.

[0051] Preferably, the explicit way in step 2 is to notify through specific signaling. An implicit method is to judge whet...

Embodiment 2

[0058] This embodiment provides a data transmission method. This embodiment combines the above embodiments and preferred implementation modes. In this embodiment, the downlink grant and PDSCH are sent on the same dynamic subframe, and the ACK is sent on the fixed uplink subframe. / NACK.

[0059] Specifically, in this embodiment, in a wireless frame, subframes 0 and 5 are fixed downlink subframes; subframes 2 and 7 are fixed uplink subframes; subframes 1 and 6 are special subframes, including DwPTS, GT, UpPTS; subframes 3, 4, 8, and 9 are dynamic subframes.

[0060] Figure 4 It is a schematic diagram of the timing relationship of the data transmission method according to the embodiment of the present invention Figure 1 ,Such as Figure 4 As shown, the downlink grant and PDSCH are sent on the same dynamic subframe, and the ACK / NACK is sent on the fixed uplink subframe. For example: the base station sends downlink grant signaling in subframe 3 of radio frame A+1, sends PDSC...

Embodiment 3

[0062] This embodiment provides a data transmission method. This embodiment combines the above embodiments and preferred implementation modes. In this embodiment, an uplink grant is sent on a fixed downlink subframe or DwPTS, and a corresponding PUSCH is sent on a dynamic subframe. ACK / NACK is sent on fixed downlink subframes.

[0063] Specifically, in a radio frame in this embodiment, subframes 0 and 5 are fixed downlink subframes; subframes 2 and 7 are fixed uplink subframes; subframes 1 and 6 are special subframes, including DwPTS, GT , UpPTS; subframes 3, 4, 8, and 9 are dynamic subframes.

[0064] Figure 5 It is a schematic diagram of the timing relationship of the data transmission method according to the embodiment of the present invention Figure II ,Such as Figure 5 As shown, the uplink grant is sent on the fixed downlink subframe or DwPTS, the corresponding PUSCH is sent on the dynamic subframe, and the ACK / NACK is sent on the fixed downlink subframe. For examp...

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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

technical field [0001] The present invention relates to the communication field, in particular, to a data transmission method and device. Background technique [0002] Long Term Evolution (referred to as LTE) system time division duplex (Time Division Duplex, referred to as TDD) mode frame structure (also known as the second type of frame structure, namely frame structure type 2), figure 1 It is a schematic diagram according to the second type frame structure of the LTE system in the related art, such as figure 1 As shown, in this frame structure, a radio frame of 10ms (307200Ts, 1ms=30720Ts) is divided into two half-frames, and each half-frame is 5ms long (153600Ts). Each half frame consists of 5 subframes with a length of 1 ms. The role of each subframe is shown in Table 1, where D represents a downlink subframe used to transmit downlink signals. U represents an uplink subframe for transmitting uplink signals. An uplink or downlink subframe is further divided into two ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/16H04W28/16H04B7/26
CPCH04W28/06
Inventor 郝鹏
Owner ZTE CORP
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