# Effective Capacity and Power Allocation for Machine-Type Communication

## TL;DR

This paper analyzes the effective capacity of ultra reliable machine-type communication networks in finite blocklength regimes, proposing an optimal power allocation scheme that balances power savings and delay constraints.

## Contribution

It introduces a closed-form approximation for effective capacity in fading channels and proposes an optimal power allocation scheme exploiting high SNR asymptotics.

## Key findings

- Proposed a closed-form EC approximation for Rayleigh fading channels.
- Derived upper bounds for EC and delay constraints with power variation.
- Developed an optimal power allocation scheme that saves power with minimal EC loss.

## Abstract

Effective capacity (EC) determines the maximum communication rate subject to a particular delay constraint. In this work, we analyze the EC of ultra reliable Machine Type Communication (MTC) networks operating in the finite blocklength (FB) regime. First, we present a closed form approximation for EC in quasi-static Rayleigh fading channels. Our analysis determines the upper bounds for EC and delay constraint when varying transmission power. Finally, we characterize the power-delay trade-off for fixed EC and propose an optimum power allocation scheme which exploits the asymptotic behavior of EC in the high SNR regime. The results illustrate that the proposed scheme provides significant power saving with a negligible loss in EC.