Resource Allocation for Energy-Efficient Device-to-Device Communication in 4G Networks

TL;DR

This paper presents an energy-efficient resource allocation scheme for D2D communications in 4G LTE-A networks, reducing power consumption and interference while maintaining QoS for all users.

Contribution

It introduces a novel resource allocation method that minimizes uplink power in D2D underlay networks while ensuring QoS for both D2D and cellular users.

Findings

Reduces total uplink transmit power for all users.

Maintains QoS for D2D and cellular users.

Effectively manages interference in 4G networks.

Abstract

Device-to-device (D2D) communications as an underlay of a LTE-A (4G) network can reduce the traffic load as well as power consumption in cellular networks by way of utilizing peer-to-peer links for users in proximity of each other. This would enable other cellular users to increment their traffic, and the aggregate traffic for all users can be significantly increased without requiring additional spectrum. However, D2D communications may increase interference to cellular users (CUs) and force CUs to increase their transmit power levels in order to maintain their required quality-of-service (QoS). This paper proposes an energy-efficient resource allocation scheme for D2D communications as an underlay of a fully loaded LTE-A (4G) cellular network. Simulations show that the proposed scheme allocates cellular uplink resources (transmit power and channel) to D2D pairs while maintaining the required QoS for D2D and cellular users and minimizing the total uplink transmit power for all users.