Stability Analysis of Device-to-Device Relay-Assisted Cellular Networks

TL;DR

This paper analyzes queue stability in device-to-device relay-assisted cellular networks considering realistic factors like bursty traffic, user mobility, and relay-generated traffic, providing insights into delay performance and resource management.

Contribution

It introduces a comprehensive stability analysis incorporating practical network properties and proposes a joint resource allocation and power control policy with proven throughput optimality.

Findings

Quantified the stability region under realistic network conditions

Developed a resource allocation policy with proven throughput optimality

Provided simulation results illustrating queue stability behavior

Abstract

Motivated by increasing popularity of delay sensitive applications, we investigate the queue stability in device-to-device (D2D) relay-assisted cellular networks. In contrast to prior works on D2D relay-assisted cellular networks, we incorporate practical properties of these networks such as bursty packet arrivals, user mobility and relays generating their own traffic. Assuming network topology evolving in IID fashion, we first evaluate the system stability region to quantify its delay performance. Subsequently, we formulate a policy for joint resource allocation and power control under a more realistic mobility scenario of generalized reflected random walk. Also, the throughput optimality of this policy is investigated. Simulation results are provided to give better understanding of queue stability in the network.