Data transmission method of D2D communication

Abstract

The invention provides a data transmission method of D2D communication and relates to the communication technology field. The method comprises the following steps of when a terminal initiates data sending based on the D2D communication, sending a data sending request to a base station so that the base station configures at least one unauthorized frequency band which needs to be measured for the terminal according to the data sending request; measuring the channel quality of a cell corresponding to the at least one unauthorized frequency band, reporting a measurement result to the base stationso that the base station configures the cell according to the measurement result and the cell is taken as the secondary service cell of the terminal, and configuring the parameters of sending data andcontrol signaling in the secondary service cell for the terminal; when data exists in the buffer memory of the terminal, reporting a buffer memory state report to the base station so that the base station distributes the physical resources of the sending data and control signaling in the secondary service cell for the terminal according to the buffer memory state report and the parameters; and according to the sending data and control signaling of the physical resources in the secondary service cell, realizing data transmission. In the invention, the unnecessary power losses of the terminal are reduced.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular, to a data transmission method for D2D communication. Background technique [0002] In order to improve the competitiveness of the LTE (Long Term Evolution, long-term evolution) system and at the same time meet the business requirements proposed by operators, 3GPP (the 3rd Generation Partnership Project, the third generation partnership project) has been Research on the new communication mode of D2D (Device to Device, device to device) discovery / communication. D2D is a mechanism that emerged in response to new business requirements. It involves all 3GPP research fields from business requirements to core network architecture to wireless access methods. The 3GPP working groups completed the first phase of research in December 2014, and designed a communication mechanism between devices based on D2D mode applied in the field of public security and a discovery mechan...

AI Technical Summary

Problems solved by technology

When a lot of control signaling sent by the terminal is received but no data has been received, the terminal receiving the data will consume unnecessary power

Images