Method and user equipment for suppressing interference

Abstract

Embodiments of the present invention provide a method for suppressing interference in a user equipment at a sending end and the user equipment. The method includes obtaining the maximum available transmission power; determining a first path loss power of at least one desired D2D link to a user equipment at a receiving end, and determining a second path loss power of at least one interfering link; according to the first path loss determining an estimated transmission power based on the maximum available transmission power and the second path loss power; and selecting a smaller power from the maximum available transmission power and the estimated transmission power as the transmission power. By controlling the transmission power of the user equipment at the transmitting end through the method of the embodiment of the present invention, not only the communication quality of the desired D2D link is guaranteed, but also the interference of the interfering link is considered, thereby effectively suppressing the transmission of the desired D2D link from the transmitting end. Interference at the receiving end of other links that reuse the same resource block improves the ability to suppress interference in D2D communication.

Description

technical field [0001] Embodiments of the present invention relate to the communication field, and more specifically, relate to a method for suppressing interference in D2D (Device-to-Device, device-to-device) and a user equipment. Background technique [0002] Introducing D2D communication into a cellular communication system is a research hotspot in the field of communication at present. D2D communication refers to direct communication between two or more user equipments. There are 4 usage paradigms for D2D communication such as figure 1 As shown, example 1 is unicast (Unicast), which is two user equipments communicating with each other; example 2 is group-cast (Group-cast), one user equipment sends information to multiple user equipments in the same member group at the same time; example 3 For broadcast (Broadcast), a user equipment broadcasts information to all user equipment within a certain geographical range at the same time; example 4 is relay propagation (Relay), ...

AI Technical Summary

Problems solved by technology

[0006] Since only the path loss power of one desired D2D link is determined, interference can only be suppressed in unicast D2D communication, and interference suppression cannot be performed on D2D communications with multiple desired D2D links such as multicast, broadcast, and relay propagation. , so that the existing technical solutions have certain application limitations

In addition, the existing technical solutions only consider the path loss power of the desired D2D link to control the transmission power of the user equipment at the transmitting end, which ensures the communication quality of the desired D2D link, but the user equipment at the transmitting end uses the final selected transmission power to send information When , there is still a large interference for other D2D links and cellular links that reuse the same resource block, and the interference suppression ability is poor

Images