Discovery detection method and apparatus applied to device to device communication

Abstract

Embodiments of the present invention provide a method and device for discovery detection in device-to-device communication. In the invention, for a first device side the method comprises creating a discovery data packet for each discovery cycle among a predetermined number of discovery cycles, wherein each discovery data packet contains identical discovery information and said predetermined number is greater than 1. Said method further comprises using, in each discovery cycle among the predetermined number of discovery cycles, logically identical discovery channels to send to at least one second device a discovery data packet. For a second device side the method comprises: receiving, during each discovery cycle among a predetermined number of discovery cycles, a discovery data packet sent by a first device via logically identical discovery channels; and soft-combining a predetermined number of discovery data packets. The method further comprises detecting discovery information in soft-combined discovery data packets. In embodiments of the present invention, the diversity gain of soft-combined discovery data packets is enhanced, thereby improving the detectability of discovery information.

Description

technical field [0001] Embodiments of the present invention generally relate to the field of communication, and more specifically relate to a method and device for discovery detection in Device-to-Device (Device-to-Device, D2D) communication. Background technique [0002] In D2D communication, in order to establish D2D communication between multiple devices, mutual discovery (discovery) between devices is required. In existing communication standards, the channel resources allocated for mutual discovery between devices are usually periodic channel resources and occupy relatively small time-frequency resources. For example, each discovery channel usually occupies one RB (resource block) and 1ms time. [0003] In the existing technical solution, when performing discovery detection, the first device constructs a discovery data packet in each discovery cycle, and uses the allocated discovery channel to send discovery information to the second device in each discovery cycle; whe...

AI Technical Summary

Problems solved by technology

[0004] However, there are certain defects in the existing technical solutions

Since the channel resources occupied by each discovery channel are small, the diversity gain of the discovery data packets transmitted on such discovery channels is very small, so that the detection performance of the second device on the discovery information in the discovery data packets is poor

Images