Angle Diversity Trasmitter For High Speed Data Center Uplink Communications

TL;DR

This paper introduces an optical wireless uplink system for data centers using angle diversity transmitters and receivers, achieving high data rates over 19 Gbps with simple modulation.

Contribution

It proposes a novel uplink optical wireless link design with angle diversity transmitters and receivers for data center architectures, enhancing reconfigurability and performance.

Findings

Achieves data rates higher than 19 Gbps.

Uses simple On-Off Keying modulation.

Demonstrates excellent performance with proposed system.

Abstract

This paper proposes an uplink optical wireless communication (OWC) link design that can be used by data centers to support communication in spine and leaf architectures between the top of rack leaf switches and large spine switches whose access points are mounted in the ceiling. The use of optical wireless links reduces cabling and allows easy reconfigurability for example when data centres expand. We consider three racks in a data center where each rack contains an Angle Diversity Transmitter (ADT) positioned on the top of the rack to realize the uplink function of a top-of-the-rack (ToR) or a leaf switch. Four receivers are considered to be installed on the ceiling where each is connected to a spine switch. Two types of optical receivers are studied which are a Wide Field-of-View Receiver (WFOVR) and an Angle Diversity Receiver (ADR). The performance of the proposed system is evaluated when the links run at data rates higher than 19 Gbps. The results indicate that the proposed approach achieves excellent performance using simple On-Off Keying (OOK)