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Data transmission method and data transmission device

A technology of a data transmission device and a data transmission method, applied in the directions of digital transmission system, transmission system, error prevention, etc., can solve problems such as air interface transmission delay, and achieve the effect of shortening feedback time

Active Publication Date: 2018-07-20
CHINA MOBILE COMM LTD RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 3. Delay of uplink data retransmission
[0013] In the existing LTE system, there is usually a fixed HARQ feedback time for both uplink and downlink, and there is also a fixed time interval between uplink authorization and uplink data transmission, which will cause air interface transmission delays

Method used

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  • Data transmission method and data transmission device
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  • Data transmission method and data transmission device

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Embodiment Construction

[0043] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments. In the following description, specific details, such as specific configurations and components, are provided only to assist in a comprehensive understanding of the embodiments of the present invention. Accordingly, those of ordinary skill in the art should recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0044] It should be understood that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of t...

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Abstract

The invention provides a data transmission method and a data transmission device for reducing air interface delay from two aspects of shortening HARQ feedback time and reducing sending interval to theuplink data from the uplink authorization. Compared with the existing fixed feedback time and fixed uplink sending interval, the HARQ feedback time and the sending time of the uplink MAC PDU can be flexibly selected according to the processing capacity of a terminal and a base station, thereby providing technology support for reducing the data delay of the low-delay and high-reliability service.Furthermore, the quick scheduling or quick feedback can be performed for the low-delay and high-reliability service as required, and the quick scheduling or quick feedback function can be never openedfor the normal service, thereby performing the backward compatibility on the normal service.

Description

technical field [0001] The invention relates to the technical field of mobile communication, in particular to a data transmission method and a data transmission device. Background technique [0002] In the next-generation communication system (5G), low-latency and high-reliability business scenarios are introduced. Such business scenarios, such as the Internet of Vehicles, have strict requirements on data transmission delay and reliability. In the current Long Term Evolution (LTE) system, data transmission delay mainly includes protocol stack processing delay and air interface delay. For downlink data, the air interface delay is mainly the delay caused by possible air interface Hybrid Automatic Repeat Request (HARQ) retransmission. For uplink data, the air interface delay includes three parts: [0003] 1. The delay between sending a scheduling request or a buffer status report (BSR) to the base station allocating resources to the terminal (UE); [0004] 2. Delay between ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L1/16H04W72/12H04W72/14
CPCH04L1/1657H04L1/187H04L1/1896H04W72/23H04L1/16H04L1/18H04W72/12H04L65/00
Inventor 王莹莹孙军帅黄学艳
Owner CHINA MOBILE COMM LTD RES INST
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