Method, device and system for realizing D2D (device to device) data transmission in cellular network

Abstract

The invention discloses a method, a device and a system for realizing D2D (device to device) data transmission in the cellular network. A method for allocating resources includes that a base station receives a data transmission request transmitted by first user equipment UE, and the first UE and second UE has set up D2D communication connection; wireless resources are allocated to data transmission between the first UE and the second UE according to the received data transmission request, and wireless resource allocation results are transmitted to the first UE and / or the second UE. The method for realizing data transmission includes that the first UE transmits a data transmission request to the base station, the first UE and the second UE receives wireless resource allocation results fed back by the base station; the first UE transmits data to the second UE by the wireless resources allocated by the base station, and the second UE receives data transmitted by the first UE by utilizing the wireless resources allocated by the base station. The method realizes D2D data transmission in the cellular network.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a method, device and system for realizing device-to-device communication (Device to Device Communication, D2D) data transmission in a cellular network. Background technique [0002] Device to Device Communication (D2D) refers to direct communication between user devices without infrastructure, and D2D in the prior art uses technologies such as Bluetooth and Wireless Fidelity (WIFI). The existing cellular network does not support D2D, and the communication between user equipment must transmit data through the base station. If D2D can be implemented in the cellular network, it will be possible for the user equipment with a short distance to discover each other and directly transmit data with the other party, thereby saving air interface and core network resources and providing new services, such as battle games and short-distance broadcasting , Machine to Machine ...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the research results are focused on academic theoretical research such as algorithms for realizing D2D resource allocation. However, in actual cellular networks, especially in long-term evolution (Long Term Evolution, LTE) networks, the realization of D2D resource allocation and data transmission There are not many related signaling studies, which means that there is currently a lack of methods for D2D resource allocation and data transmission in cellular networks

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