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A data transmission method and data transmission device

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

Active Publication Date: 2020-04-14
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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  • A data transmission method and data transmission device
  • A data transmission method and data transmission device
  • A 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. The invention reduces the time delay of the air interface from two aspects of shortening the HARQ feedback time and reducing the interval between uplink authorization and uplink data transmission. Compared with the existing fixed feedback time and fixed uplink transmission interval, the embodiment of the present invention can flexibly select the HARQ feedback time and uplink MAC PDU transmission time according to the processing capabilities of the terminal and the base station, in order to reduce the low latency and high reliability Provide technical support for business data delay. In addition, the example of the present invention can also perform fast scheduling or fast feedback for low-latency and high-reliability services according to needs, and do not enable the fast scheduling or fast feedback functions for ordinary services, so as to achieve backward compatibility with ordinary services.

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 Patents(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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