Mark Grayson

Cisco Fellow

Cisco’s Emerging Technologies & Innovation Group

Mark Grayson is a Distinguished Consulting Engineer in Cisco’s ETI Group, where he currently has broad responsibility for leading Cisco's 5G strategy, including defining the role of Wi-Fi based access, leading Cisco’s multi-vendor RAN virtualization program as well as supporting Cisco’s enterprise team defining systems for supporting 5G enterprise use cases.

He has over 25 years of experience in the wireless industry, ranging from the development of military HF systems, cellular handset RF/DSP design, the definition of mobile satellite communication architectures, architecting service provider Wi-Fi solutions, the evolution of traditional cellular systems through to the creation of the latest virtualized RAN solutions.

He holds a first class Honors degree in Electronics and Communications Engineering from the University of Birmingham (England) together with a PhD in Radio Communications. Mark has been granted over 120 patents in the area of mobile communications and is the co-author of IP Design for Mobile Networks (2009) and Building the Mobile Internet (2011), both published by Cisco Press.


December 15, 2022


Making private 5G interconnect easy to configure, simple to operate, and widely adopted

10 min read

Simplification and scaling of private 5G solutions is going to be critical to ensure the full potential of 5G can be harnessed. In this post we will highlight an approach that can facilitate the adoption of roaming interconnect between private and public 5G networks.

November 9, 2022


Scaling the Adoption of Private Cellular Networks

8 min read

The problems and solutions of interconnecting millions of private 5G networks.

Comparing Lower Layer Splits for Open Fronthaul Deployments

11 min read

The transition to open RAN (Radio Access Network) based on interoperable lower layer splits is gaining significant momentum across the mobile industry. However, where best to split the open RAN is a complex compromise between radio unit (RU) simplification, support of advanced coordinated multipoint RF capabilities, consequential limitations on transport delay budgets as well as bandwidth expansion. This post compares the two leading alternative splits for realizing an interoperable open RAN.

July 6, 2020


Why WBA’s OpenRoaming is laying the foundation for a roaming revolution

3 min read

OpenRoaming is set to revolutionize roaming, enabling access and identify partners with very different business models to co-operate in order to deliver seamless wireless service to users.

Open vRAN Update: NETCONF/YANG Comes to 5G RAN!

1 min read

One of the key principles of the Open vRAN ecosystem that Cisco and its ecosystem partners announced earlier this year, is to establish open, standard interfaces and management for vRAN. Recently the xRAN Forum has defined the use of IETF’s NETCONF/YANG standard for programmatically configuring and managing its lower layer split RAN architecture.

November 2, 2017


Realizing a Multi-Vendor Virtualized RAN

2 min read

Showcasing the results of the co-operation between Cisco, Open Air Interface and the open-nFAPI project: demonstrating how open-source can accelerate RAN modularization and ease the adoption of multi-vendor vRAN splits

Cisco joins Open Air Interface to accelerate open multi-vendor RAN splits

2 min read

Cisco is pleased to announce we have joined the Open Air Interface (OAI) open source ecosystem and welcomes other members and researchers to contribute to this effort.

February 17, 2017


Multi-Operator Essentials for 5G Success

2 min read

Over 80% of mobile data is being consumed indoors. This white paper examines at the essentials for multi-operator 5G to succeed in indoor environments.

December 1, 2016


Heterogeneity as a New Network Normal

2 min read

If 5G is going to deliver on its promise, it must be accompanied by an organizational transformation, where traditional boundaries are increasingly blurred.

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