Relay-Assisted Multiple Access with Multi-Packet Reception Capability and Simultaneous Transmission and Reception

TL;DR

This paper analyzes a relay-assisted multiple access system with multi-packet reception and simultaneous transmission and reception, deriving queue stability conditions and throughput performance considering self interference.

Contribution

It provides analytical expressions for queue dynamics and throughput in a relay system with self interference and multi-packet reception capabilities, which is a novel comprehensive analysis.

Findings

Queue stability depends on transmission probabilities and self interference.

Self interference significantly impacts throughput performance.

Analytical formulas enable performance evaluation under various conditions.

Abstract

In this work we examine the operation of a node relaying packets from a number of users to a destination node. We assume multi-packet reception capabilities for the relay and the destination node. The relay node can transmit and receive at the same time, so the problem of self interference arises. The relay does not have packets of its own and the traffic at the source nodes is considered saturated. The relay node stores a source packet that it receives successfully in its queue when the transmission to the destination node has failed. We obtain analytical expressions for the characteristics of the relay's queue (such as arrival and service rate of the relay's queue), the stability condition and the average length of the queue as functions of the probabilities of transmissions, the self interference coefficient and the outage probabilities of the links. We study the impact of the relay node and the self interference coefficient on the throughput per user-source as well as the aggregate throughput.