Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and apparatus for data transmission

A technology of data transmission and data, which is applied in the field of data transmission, can solve the problem that dynamic allocation of uplink and downlink subframes cannot be directly applied, and achieve the effect of synchronous HARQ or asynchronous HARQ transmission

Active Publication Date: 2011-09-28
DATANG MOBILE COMM EQUIP CO LTD
View PDF4 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the scheme of dynamically allocating uplink and downlink subframes, its subframe structure is different from that of static or semi-statically allocated subframes. Therefore, the existing HARQ timing design cannot be directly applied to the scheme of dynamically allocating uplink and downlink subframes. Retransmission scheduling and The retransmission timing of data also needs to be improved, but there is no effective solution at present

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for data transmission
  • Method and apparatus for data transmission
  • Method and apparatus for data transmission

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In the embodiment of the present invention, a new HARQ transmission strategy is designed for the dynamic subframe system, which realizes data scheduling and transmission, and distinguishes synchronous HARQ or asynchronous HARQ through HARQ process information, and realizes synchronous HARQ or asynchronous HARQ transmission of data.

[0031] In this embodiment, the dynamic subframe system is composed of at least four types of subframes, wherein the first type of subframe can only be used for downlink transmission subframes, which can be called fixed downlink subframes; the second type of subframe can only be used for uplink transmission The subframes can be called fixed uplink subframes; the third type of subframes can be dynamically configured as subframes for uplink or downlink transmission, which can be called flexibly configured subframes, but the third type of subframes cannot be used at the same time For uplink and downlink transmission; the fourth type of subframe ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a data transmission method which is used to realize data transmission when uplink and downlink subframes are dynamically distributed. The dynamic subframe system is composed of at least four kinds of subframes, wherein the first kind only can be used as the subframe of downlink transmission, the second kind only can be used as the subframe of uplink transmission, the third kind can be dynamically configured to be the subframe used for uplink or downlink transmission, the third kind can not be simultaneously used for uplink and downlink transmission, the fourth kind has a special time slot, the fourth kind comprises a downlink pilot frequency time slot, a protection interval and an uplink pilot frequency time slot. The method comprises that: a sending terminal only receives the uplink scheduling signaling signaling of HARQ process information at the downlink plot frequency time slot of the first kind or the fourth kind subframe; the sending terminal sends the data in the HARQ process indicated by the HARQ process information in the second or third kind subframe. The invention also discloses an implementation method of a receiving terminal and an apparatus used to realize the method.

Description

technical field [0001] The invention relates to the communication field, in particular to a data transmission method and device. Background technique [0002] In the common TDD (time division duplex) system, including 3G (third generation communication system) TD-SCDMA (time division synchronous code division multiple access) system and 4G (fourth generation communication system) TD-LTE ( Time division long-term evolution) system, the division of uplink and downlink time slots is static or semi-static, the usual practice is to determine the proportion of uplink and downlink time slots according to the cell type and the approximate business ratio during the network planning process and keep it unchanged. This is a relatively simple approach in the context of large macro cell coverage, and it is also relatively effective. With the development of technology, more and more low-power base stations such as Pico cells and Home NodeBs are deployed to provide local small coverage. I...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04B7/26H04L1/18H04W72/12
CPCH04W72/1263H04L1/1887H04L1/18H04B7/2656H04B7/26H04W72/12
Inventor 徐婧潘学明沈祖康
Owner DATANG MOBILE COMM EQUIP CO LTD