A resource allocation method based on terminal direct relay communication

Abstract

The invention relates to a device-to-device relay communication-based resource allocation method. In a single cell, an LTE-Advanced cellular network and a device-to-device (D2D) system constitute a hybrid network, and the duplex mode of the cellular network is a time division duplex mode, and the device-to-device (D2D) system utilizes the uplink resources of the cellular network in the cell in a multiplex mode. The device-to-device relay communication-based resource allocation method includes the steps of interaction with a base station, update of a resource record table, application and distribution of resources, and selection of relay nodes. According to the device-to-device relay communication-based resource allocation method of the invention, at first, system resources are allocated to active cellular subscribers according to polling standards under the premise that communication quality can be ensured, and then, most suitable resources are selected for device-to-device (D2D) subscribers in the cell through using a genetic algorithm according to maximum resource utilization rate standards. The objective of the invention is to minimize the probability of resource allocation failure and enable more device-to-device (D2D) subscribers can perform communication with normal communication of the cellular subscribers ensured.

Description

technical field [0001] The invention relates to a resource allocation method based on direct-to-device (D2D) relay communication, which uses LTE-Advanced cellular network, D2D communication and relay technology to perform centralized resource scheduling through base stations, and is suitable for future hybrid systems (Hybrid System). Background technique [0002] In recent years, the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) technology has attracted worldwide attention because of its advantages such as high data rate and high system capacity, and a large number of research forces have been or are working on it contribute to the development of It can be predicted that LTE technology will be a solid foundation for realizing the IMT-Advanced technical proposal, and LTE technology research has entered the LTE-Advanced stage. [0003] For the cellular mechanism, the main advantage lies in convenient resource allocation and power control, while the obvi...

AI Technical Summary

Problems solved by technology

However, if idle users near D2D users are used as mobile relays for D2D communication, there will be a mixture of multiple interference links, making the interference problem more complicated. At the same time, since the relay system needs to use two transmission time intervals ( TTI) to perform a transmission, so compared with the direct connection mode, the throughput will inevitably decrease, so the goal of resource allocation should focus on reducing the probability of D2D user resource allocation failure and improving the overall applicability and applicability of the system.

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