Data transmission method, terminal equipment and network equipment

Abstract

Provided is a data transmission method, comprising: a terminal device receiving first downlink control information (DCI), the first DCI being used for scheduling a first physical downlink shared channel (PDSCH) transmitted using a first transmission time interval (TTI); if the terminal device receives a second DCI within the time period of receiving the first PDSCH, the terminal device receives the second DCI, the second DCI is used for scheduling a second PDSCH transmitted by using a second TTI, and the first TTI is greater than the second TTI; wherein the terminal device does not demodulatethe first PDSCH. According to the method provided by the embodiment of the invention, a plurality of TTIs can be dynamically supported in the same carrier to perform data transmission, the terminal equipment can determine the priority of the transmission channel in one carrier, and the method not only can meet the requirement of time delay, but also can consider the compatibility with the existingsystem.

Description

[0001] This application is a branch of the PCT international patent application PCT / CN2016 / 076805 with the filing date of March 18, 2016, which entered the Chinese national phase with the Chinese patent application number 201680064934.9, and the invention title is "data transmission method, terminal equipment and network equipment". case application. technical field [0002] Embodiments of the present invention relate to the communication field, and more specifically, relate to a method for data transmission, a terminal device, and a network device. Background technique [0003] In future communication technologies, with the continuous expansion of air interface technology and applications, reducing latency will become one of the key performance indicators. For example, the end-to-end delay requirement for real-time remote computing for mobile terminals of mobile terminals is less than 10 ms, and the delay requirement for Traffic efficiency and safety is 5 ms, while the exis...

AI Technical Summary

Problems solved by technology

The advantage of short TTI is to shorten the transmission delay, but the corresponding cost is high control signaling overhead and low spectrum efficiency

For a terminal with multiple types of services at the same time, if a unified TTI is determined based on the service requiring the minimum delay, resources will be wasted

In addition, on the carrier that supports short TTI transmission, the compatibility with the existing LTE system cannot be guaranteed, that is, it cannot be compatible with 1ms TTI

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