- Article & Insights
- December 6, 2023
- Hema Kadia
Explore how Radisys and its industry partners are enhancing energy efficiency and sustainability in 5G networks, focusing on Open RAN solutions.
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Open RAN
Open RAN disaggregates the radio access network, separating hardware from software and standardizing the interfaces between components so operators can mix equipment from multiple vendors rather than buying a single integrated stack. The aim is more competition, lower cost, and greater flexibility, with the O-RAN Alliance defining the key specifications. Adoption has progressed from trials toward commercial deployments, though integration complexity, performance parity, and energy efficiency remain active challenges. Open RAN intersects with virtualization, cloud-native RAN, and AI-driven optimization, and is increasingly applied to 5G and private-network builds. For operators, it reshapes vendor strategy and supply chains; for new entrants, it lowers barriers to the RAN market. This channel covers Open RAN standards, deployments, and ecosystem developments, with analysis of where disaggregation is delivering on its promises and where it still falls short.
- Podcast
- December 6, 2023
- 5G Techritory
While Open RAN offers numerous advantages, some stakeholders raise concerns about its security implications. This session delved into the risks and challenges posed by Open RAN deployments and explored strategies to mitigate potential security threats. Industry experts and security professionals shared their insights on best practices for ensuring secure Open RAN implementation while fostering innovation and maintaining an open ecosystem.
- Article & Insights
- December 2, 2023
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- Whitepaper
- December 1, 2023
- 5G Americas
Explore comprehensive whitepaper on 'Energy Efficiency and Sustainability in Mobile Communications Networks'. Get info on advanced strategies for reducing energy consumption in RAN, system architecture innovations like network slicing and Open RAN, and the transformative role of AI/ML. Discover solutions in renewable energy integration, indoor 5G deployment, and RAN sharing to achieve environmental sustainability in the telecom sector.
Explore the dynamic world of Open Radio Access Networks with 5G Americas' whitepaper, 'Open RAN Update'. Get details of the transition from traditional, closed architectures to open, interoperable systems in the RAN industry. Understand the decomposition of physical and virtual functions, fostering a diverse supply chain and innovation. Learn about the impact of Open RAN in streamlining network management and enhancing scalability through cloud-native operations and AI/ML applications. This comprehensive analysis covers Open RAN's evolution, deployment forecasts, architectural updates, security protocols, and interoperability challenges. Ideal for network operators and industry stakeholders, it offers valuable insights into market trends, security enhancements, and the global growth potential of Open RAN networks.
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- November 9, 2023
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This discussion aims to shape the future of 24/7 connectivity for defense forces, ensuring they remain connected, informed, and empowered in the face of evolving challenges. As the modern soldier and battlefield demand uninterrupted connectivity, our experts will delve into the challenges and explore the best tools or combination of tools to meet this critical requirement. Our panelists discuss various options on the table, including private networks on wheels, satellite communication, and Open RAN solutions.
- Usecase
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- Hema Kadia
IS-Wireless collaborates with Riga Technical University to set up a state-of-the-art 5G Open RAN Laboratory. This venture aims to provide a robust network for both educational and expansive research purposes, heralding a new chapter in mobile network research and development.
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- October 17, 2023
- Hema Kadia
Explore Radisys's pivotal role in advancing 5G technology and Open RAN ecosystems. Discover their collaborative efforts with global industry-standard organizations, innovative use cases, and a future vision that fortifies its position as a key player in the global telecom sector, ensuring scalable and flexible network solutions.
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- Appledore Research
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- August 22, 2023
- TeckNexus Editorial
Federated Wireless teams up with VMware to launch a private 4G and 5G networks service tailored for enterprises. This collaboration aims to simplify the deployment and management of these networks, ensuring optimal performance and seamless integration with existing IT environments.
- Whitepaper
- August 9, 2023
- Radisys
Dive deep into how Radisys Corporation is navigating the dynamic landscape of Open RAN and 5G technologies. With their innovative strategies, they are making monumental strides in advancing the deployment and implementation of scalable, flexible, and efficient solutions. Get insights into how they're leveraging small cells, private networks, and strategic collaborations within the 5G ecosystem.
Frequently Asked Questions
What is Open RAN, and why does it matter?
Open RAN disaggregates the radio access network into interoperable components, like the radio unit, distributed unit, and centralized unit, from different vendors instead of one company’s fully integrated, proprietary system, using standardized interfaces defined largely through the O-RAN Alliance. The goal is to reduce vendor lock-in, lower costs through increased competition among a broader pool of vendors, and open the market to smaller, more specialized suppliers who previously couldn’t compete for an entire integrated RAN contract but can now supply individual, standardized components. This represents a genuinely significant shift in an industry historically dominated by a small number of large, established equipment vendors.
Has Open RAN actually been deployed commercially, or is it still mostly trials?
Both descriptions are accurate depending on which operator and market you’re looking at. Dish Network’s greenfield U.S. 5G network covers over 70 percent of the U.S. population using multi-vendor Open RAN running on AWS infrastructure. AT&T has converted more than half of its network traffic to open-capable hardware as part of an ongoing modernization effort, and completed more than half of its radio replacement program as of early 2026. At the same time, integration complexity still makes Open RAN rollouts run 30 to 50 percent longer than traditional, fully integrated RAN deployments according to industry estimates, meaning many operators remain earlier in their transition than the most prominent examples.
Why are governments pushing Open RAN specifically?
Security and supply-chain diversification are major drivers behind government support for Open RAN, distinct from its original cost and innovation motivations. The U.S. NTIA backed Open RAN development with a $1.5 billion funding program, and similar initiatives exist in the UK and EU, largely motivated by reducing reliance on a small number of equipment vendors, including specific geopolitical concerns about Chinese suppliers. Governments view a more diverse, multi-vendor RAN supply chain as both a national security consideration and an economic development opportunity, supporting the growth of domestic and allied-country vendors who can now compete for individual component contracts.
What share of the RAN market does Open RAN actually represent?
Estimates vary by analyst and methodology, but a 2026 Omdia operator survey found that approximately 40 percent of operators surveyed have meaningfully adopted Open RAN principles, either deploying it in production networks or using O-RAN architecture to guide their broader RAN strategy, up significantly from the small, early-pilot adoption rates of just a few years earlier. Separately, the global Open RAN equipment market itself was valued at roughly $5.75 billion in 2025 and is projected to grow substantially through the early 2030s at a compound annual growth rate above 25 percent, even though it still represents a minority share of the overall global RAN equipment market dominated by traditional integrated vendors.
How does Open RAN connect to AI and 6G?
Open RAN’s standardized, programmable interfaces make it considerably easier to integrate AI directly into radio network decision-making, sometimes called AI RAN, since AI applications, known as rApps and xApps, can be developed by third parties and deployed onto the standardized RAN Intelligent Controller framework without needing deep, proprietary integration with a single vendor’s closed system. Operators report measurable spectral efficiency improvements, in the range of 10 to 15 percent in some reported cases, from AI-driven resource allocation enabled by this open architecture. Open RAN’s modularity also makes it a more practical environment for testing new 6G-era concepts incrementally rather than needing to replace an entire integrated system at once.
What are the biggest criticisms or skepticism around Open RAN?
Skepticism around Open RAN generally centers on a few recurring concerns. Performance parity with traditional, fully integrated RAN systems has been a persistent question, since some early multi-vendor deployments have struggled to match the optimization and reliability that comes from a single vendor controlling and tightly integrating every layer of the system. Integration complexity genuinely does extend deployment timelines, raising real questions about whether projected cost savings from increased vendor competition actually offset added integration costs and delays in practice. Some industry voices also argue that Open RAN’s promised vendor diversity and price competition benefits have materialized more slowly than initial enthusiasm suggested.
Who are the main vendors competing in the Open RAN ecosystem?
The Open RAN vendor ecosystem includes both newer, Open RAN-focused specialists and established traditional vendors adapting to the disaggregated model. Newer entrants include companies like Mavenir, Parallel Wireless, and Rakuten Symphony, the latter spun out of Rakuten Mobile’s own early greenfield Open RAN deployment in Japan to sell that technology and approach to other operators globally. Traditional, established vendors including Nokia, Samsung, NEC, and Fujitsu have also adapted their offerings to support Open RAN-compliant, interoperable components rather than purely proprietary integrated systems. Ericsson and Huawei remain dominant in the broader, traditional RAN market but have also engaged with Open RAN initiatives to varying degrees.
What’s the difference between Open RAN and Cloud RAN?
Open RAN and Cloud RAN address related but distinct aspects of RAN modernization. Open RAN specifically refers to using standardized, open interfaces so that radio network components from different vendors can interoperate, addressing vendor lock-in and supply chain diversity. Cloud RAN refers to running RAN software functions on virtualized, cloud-based infrastructure using standard servers rather than dedicated, purpose-built hardware, addressing flexibility and scalability. The two concepts are complementary and often pursued together, since Open RAN’s standardized interfaces make it easier to deploy RAN functions in a Cloud RAN environment from multiple different software vendors, but a network could technically pursue one without fully pursuing the other.
Which industry organizations are playing a prominent role in developing Open RAN?
The main organizations driving the evolution of Open RAN include O-RAN Alliance, O-RAN OSC (Linux Foundation), ONF (SD-RAN project), and Telecom Infra Project (TIP).
O-RAN Alliance focuses on use cases, open RAN architecture, open interfaces, and specifications including testing and integration, while O-RAN OSC and the ONF SD-RAN project provide a software base for some of the components such as RIC. O-RAN ALLIANCE members and contributors have committed to evolving radio access networks around the world. Future RANs will be built on a foundation of virtualized network elements, white-box hardware, and standardized interfaces that fully embrace O-RAN’s core principles of intelligence and openness.
Meanwhile, TIP plays a crucial role in aligning the use cases, deployment requirements, vendors and operators so that first, tests can be conducted in labs and field networks, and subsequently, for the acceleration of commercial deployments. Within TIP, the OpenRAN Project Group defines and builds RAN solutions for 2G,3G, 4G, and 5G RAN networks based on general-purpose vendor-neutral hardware, open interfaces & software. The OpenRAN MoU Group was formed by TIP participants DT, Vodafone, Telefonica, Orange, and TIM, who are working to define and develop OpenRAN solutions that can bring the connectivity that the world needs today, and in decades to come. Link to download the whitepaper “BUILDING AN OPEN RAN ECOSYSTEM FOR EUROPE for Europe to lead in this essential innovation” by Deutsche Telekom, Orange, Telecom Italia (TIM), Telefónica, Vodafone, Nov 2021.
Open RAN Trials/Launches and Ecosystem Vendors from 2020/21
Please see the 5G Magazine, Open RAN edition for more details. Also, visit Open RAN latest deployments/trials.
Open RAN Asia-Pacific
- Rakuten has launched 4G, and 5G commercial services based on open RAN architecture in Japan, leveraging multiple vendors’ radios. The key vendors in these deployments include Altiostar, Cisco, Nokia, Intel, IBM Red Hat, OKI, Fujitsu, Ciena, NEC/Netcracker, Qualcomm, Mavenir, Quanta Cloud Technology, Sercomm, Tech Mahindra, Allot, Innoeye, Viavi, Robin.io, Radcom, and Airspan.
- NTT Docomo commercially deployed Open RAN-based 5G sites in Tokyo in Sept 2020 based on open interfaces (fronthaul and X2 interfaces) specified by O-RAN. The key vendors of this ecosystem include NEC, Samsung, Fujitsu, and Nokia.
- Reliance Jio is building its own 5G network based on Open RAN technology. It plans to leverage the companies that have India-based manufacturing. Some of the companies that could potentially be part of the Jio 5G ecosystem include SignalChip, Saankhya Labs, Tejas Networks, Sterlite Technologies, and VVDN Technologies. Radisys (acquired by Jio) and Qualcomm are already part of this ecosystem. For Jio’s 4G network, the key vendors include Samsung, Nokia, Ericsson, Ceragon, NEC, Dragonwave, Ciena, Tejas, Airspan, Arista, Cisco, HP, IBM Genband, Dell, RAD, Juniper, F5, and Citrix.
- Vodafone Idea commercially deployed Open RAN software for 4G services at multiple cell sites in India in Dec 2019. It further expanded open RAN deployments to TDD and massive MIMO sites in selected cities in 2020 with Mavenir.
- Indosat Ooredoo and Smartfren have conducted TIP OpenRAN based 4G network trials at several sites in Indonesia in 2020, focusing on rural connectivity.
- Edotco conducted TIP OpenRAN based trial for 4G sites in Malaysia in 2020 to validate the network as a service environment. The plan is to provide wholesale services to mobile service providers such as Celcom Axiata.
- Optus has deployed an Open RAN-based 4G commercial network for coverage in remote Australia with Parallel Wireless.
Americas
- AT&T has commercially deployed an Open RAN-based 5G network at few sites in Dallas in Aug 2020 with Ericsson and Samsung. AT&T has also conducted several O-RAN trials to demonstrate a mmWave 5G gNB and open front haul leveraging developments with CommScope and Intel.
- Dish is building the cloud-native, Open RAN technology-based 5G broadband network that would comply with its O-RAN specifications. The key vendors part of the Dish 5G network ecosystem includes Altiostar, Mavenir, Fujitsu, Intel, Qualcomm, Nokia, VMware, Ciena Blue Planet, Matrixx Hansen Technologies, DigitalRoute, and MTI.
- Inland Cellular deployed TIP OpenRAN based solution for commercially launching 4G services and laid the foundation for future OpenRAN based 5G services. ExteNet Systems, Parallel Wireless, Dell EMC, and Intel are the key vendors in the Inland 4G OpenRAN deployment.
- OptimERA is working on open RAN-based LTE services and plans to upgrade the deployment to support 5G services.
- Telefonica conducted Open RAN technology-based trials for 4G and 5G in Brazil, with Mavenir, Parallel Wireless, Altiostar, Gigatera Communications, Supermicro, Intel, and Xilinx.
- Internet Para Todos (IPT), a wholesale operator in Peru owned by Telefonica, Facebook, and Latin American banks IDB Invest and CAF Bank, has deployed TIP OpenRAN architecture based commercial 4G mobile broadband for providing connectivity to remote regions. Parallel Wireless is the critical OpenRAN vendor in this deployment.
Europe
- Vodafone has deployed Open RAN technology for 4G commercial services at 30 rural sites in Ireland via CrowdCell small cell and Lime Microsystems solutions.
- Vodafone is conducting field/lab trials with Open RAN technology for 4G services with Parallel Wireless and Open CrowdCell, in Italy, Romania, and Spain.
- VodafoneZiggo is conducting field trials with Open RAN technology for 4G and 5G with NEC and Altiostar.
- Telefonica conducted Open RAN technology-based trials for 4G and 5G in the UK, with Mavenir, DenseAir (an offshoot of Airspan), and Wavemobile.
- Vodafone has commercially launched the first OpenRAN 4G site in a rural area at the Royal Welsh Showground in Powys, Wales, the UK, with Mavenir, Dell, Kontron, CrowdCell, and Lime Microsystems.
Middle-East and Africa
- Etisalat in UAE is conducting TIP OpenRAN based trials for 4G with Parallel Wireless, Altiostar, Cisco, and NEC.
- Vodacom has conducted trials with TIP OpenRAN in the Democratic Republic of Congo (DRC) with Parallel Wireless.
- MTN and Vodacom conducted TIP OpenRAN based trials for 4G in Mozambique. Key vendors included Parallel Wireless, Mavenir, CrowdCell, and Lime Microsystems.
- MTN also conducted 4G trials with TIP OpenRAN in South Africa and deployed TIP-based OpenRAN in Zambia with Parallel Wireless.
- MTN has ongoing TIP OpenRAN based operations for 4G commercial services in Uganda and Guinea Conakry, with VANU, Parallel Wireless, and NuRAN wireless.
Open RAN Trials/Launches - 2022
Please see the 5G Magazine, 5G Magazine Jan edition for Open RAN state as of Dec 2021. See 5G Magazine, Open RAN edition for comprehensive details on Open RAN. Get the latest news on Open RAN here.
- BT and Nokia trial Open RAN solution in Hull, UK, to enhance the mobile broadband experience - BT announced details of a trial in Hull, UK, showcasing the company’s continued dedication to the advancement and implementation of Open RAN technology. The Nokia RAN Intelligent Controller (RIC) for Open RAN will be installed across a number of sites by BT to optimize network performance for customers of EE’s mobile network. Link to BT’s press release: here
- Vodafone switches on UK’s first 5G Open RAN site - Vodafone has switched on the UK’s first 5G Open RAN site in Bath, Somerset. The new site is the first of 2,500 planned and marks the beginning of the first scaled Open RAN project in Europe. In Jun 2021, Vodafone had unveiled its strategic vendors – Dell, NEC, Samsung Electronics, Wind River, Capgemini Engineering, and Keysight Technologies – to jointly deliver the first commercial deployment of Open Radio Access Network (RAN) in Europe. Vodafone’s initial focus will be on the 2,500 sites in the UK that it has committed to Open RAN in October 2020. Link to Vodafone’s press release: here
- O2 / Telefónica activates Germany’s first Open RAN mini-radio cells - O2 / Telefónica announced it has activated the first mini-radio cells with innovative Open RAN technology (ORAN) in Munich, Germany. In addition to the very well-developed O2 network, this will provide all O2 customers with even more capacity and higher bandwidths at busy locations in the future. The installation of pure 5G Open RAN mini radio cells (“5G standalone”) will follow later in the year. With the compact, flexibly deployable latest-generation mini mobile cells, the company is able to increase 5G/4G capacities in the O2 network at high-traffic locations in urban areas faster than before. The mini-radio cells, attached to a building facade on Klenzestraße in Munich’s Gärtnerplatz district, supplement the 4G/5G mobile network installed on rooftops in the city center but do not replace it. Link to O2 / Telefónica’s press release: here
- KT, NTT DOCOMO, & Fujitsu Cooperate Test Interoperability for Open RAN in Korea - KT Corporation and Fujitsu Limited have completed a verification facility at the KT Research and Development Center in Seoul, South Korea, at which the two companies leveraged Fujitsu’s Open RAN-based 5G base station equipment to test call connection during interoperability trials for open fronthaul successfully. NTT DOCOMO has provided Fujitsu with technical support throughout the project. With the construction of this new test facility, KT will accelerate the introduction of Open RAN technology to Korea’s 5G network. As a result of their successful collaboration, the three companies have concluded a Memorandum of Understanding (effective date January 6, 2022), centering on the introduction of software-defined virtualized RAN (vRAN) and RAN Intelligent Controller (RIC) in alignment with the “5G Open RAN Ecosystem”, an initiative whose participants include NTT DOCOMO and Fujitsu. In this Memorandum of Understanding, the three companies agree to cooperate towards further activities including the construction of an O-RAN test facility and multi-vendor interoperability testing in Korea. Link to Fujitsu’s press release: here
Top Open RAN Vendors
The top 28 Open RAN vendors include Parallel Wireless, Mavenir, Altiostar, NEC, Intel, Fujitsu, Qualcomm, Gigatera, Dell, Lime Microsystems, and more. See the 5G Magazine, Open RAN edition for details.
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