A Multi-Service Oriented Multiple-Access Scheme for Next-Generation Mobile Networks

TL;DR

This paper introduces MOMA, a multi-service oriented multiple access scheme for 5G networks that efficiently manages diverse QoS requirements and massive device connectivity using hierarchical spreading and massive MIMO techniques.

Contribution

The paper proposes a novel integrated access scheme, MOMA, that classifies users, employs class-dependent hierarchical spreading, and utilizes massive MIMO for efficient multi-service support in 5G.

Findings

MOMA effectively supports diverse QoS profiles and massive connections.

Massive MIMO enables simple receiver structures with high performance.

Practical implementations demonstrate the scheme's feasibility.

Abstract

One of the key requirements for fifth-generation (5G) cellular networks is their ability to handle densely connected devices with different quality of service (QoS) requirements. In this article, we present multi-service oriented multiple access (MOMA), an integrated access scheme for massive connections with diverse QoS profiles and/or traffic patterns originating from both handheld devices and machine-to-machine (M2M) transmissions. MOMA is based on a) stablishing separate classes of users based on relevant criteria that go beyond the simple handheld/M2M split, b) class dependent hierarchical spreading of the data signal and c) a mix of multiuser and single-user detection schemes at the receiver. Practical implementations of the MOMA principle are provided for base stations (BSs) that are equipped with a large number of antenna elements. Finally, it is shown that such a massive-multiple-input-multiple-output (MIMO) scenario enables the achievement of all the benefits of MOMA even with a simple receiver structure that allows to concentrate the receiver complexity where effectively needed.