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Tag Archives: Commscope

Engineering Behind Heavy-duty Single-point Monopole Platform Mount and Mount-to-tower Interaction Analysis

By Jyoti Ojha, P.E., CommScope

As mobile networks accelerate their 5G wireless communications system planning and deployment, the inability to support more RF equipment becomes a serious challenge for site architects, structural engineers and mobile networks operators (MNOs). This issue becomes particularly acute at sites involving sectorized monopoles that typically use a single point of attachment for RF equipment mounts and platforms.

With the 5G revolution evolving, demand is increasing for heavy-duty mounts that can support today’s higher- load radio-integrated antennas. The following information highlights the engineering and design of CommScope’s new Atlas monopole platform mount (see Figure 1).

Figure 1. Atlas monopole platform mount.

Design Description

The Atlas monopole platform mount solution was developed following extensive research into the industry requirements for a high-load capacity monopole platform with simplified construction and verifiable compliance with the TIA-5053 standard.

The design uses deep rectangular hollow standoff tubes. This type of hollow structural section (HSS) standoff tube eliminates the need for a welded truss-type standoff system and enables the use of commercially available software, such as RISA-3D, for fast and simple analysis.

 

Analysis Process

Commercial software, RISA-3D, was used for concept verification and validation of the overall structural integrity of the mount. Finite element analysis (FEA) was used to capture the physical characteristics for accurate load capabilities of the collars and mount-to-tower interaction analysis. The CommScope design team began by using SolidWorks to build a full 3D model consisting of the platform, support pipes and collar-mount components. These components were then transferred to ANSYS, the FEA simulation software, for analysis.

 

Design Process and FEA Validation

One of the limiting factors with the mounting of tri-sector frames is their vertical load capacity. This is especially true for frames that attach to the monopole via a single-point ring-mount collar. To increase the load capacity of the frame, OEMs can support the frame by adding standoff arms to create a truss-like structure.

However, this may require significant welding or produce significant waste material, especially if the stand-off arm is cut out of a solid sheet or plate. Other designs consist of gussets — one on each side of the stand-off arms — which can increase manufacturing time and cost and result in a cavity where water can pool.

During the pre-design phase, the CommScope team identified the need to develop a mounting frame that would allow for easy and efficient fabrication during installation while reducing the manufacturing costs. Based on our research and evaluation, we designed a high-capacity collar mount that can accommodate the increased loads from a deep hollow rectangular tube stand-off platform and support greater equipment loads. FEA validation was conducted to finalize the required depth of the HSS tubing in conjunction with the new high-capacity ring-mount collar.

Figure 2: FEA validation of required standoff arm depth.

 

Another feature of the mounting structure is the uniquely designed pivot brackets that replace the traditional clip angles generally made from bent steel plates. The traditional clip angles connect the triangle-base frame to the front horizontal members. The lateral wind forces acting in these horizontal face members may generate a bending moment along the weak axis of the clip angles. The new pivot bracket uses a dual flange with ample depth to compensate for the stress caused by high bending moments at the weak axis. This redesign was motivated, in l arge part, by the industry’s move toward a more granular analysis methodology.

Figure 3. Rendered view and FEA validation of pivot bracket.

With the frame members designed and their performance simulated, the team focused on the critical connection between the mounting collar and monopole. The first challenge was how to support the deeper stand-off arm. Multiple simulations indicated that using a traditional ring mount with two threaded rods would not support the increased new stand-off loads. The answer was to design the high-capacity collar-ring mount with two double-threaded rods located at the top and bottom of the collar mount. The depth of the collar base members was selected to maximize the loading.

Next, the focus turned to the mount-to-monopole connection. The team considered multiple designs—such as rounded members, double-angled members and flat-plate members— before finalizing the best need for the collar mount.

Figure 4. FEA analysis or irritation on collar mount design.

While investigating the mount-to-tower connection, we identified monopole designs with thinner plate-steel shafts (less than 3/16 in) that will experience plastic deformation under extreme wind loading conditions. While traditional structures utilize 3/16-in materials, the use of thinner-wall material presented concerns. The decision was made to analyze the monopole shaft diameter in multiple simulations to define the localized effects from the mount-to-tower connection.

Figure 5. FEA investigation into the mount-to-monopole connection in thin-shafted monopole.

Validation Through Physical Analysis

A prototype of the Atlas platform mount was assembled on a test monopole for form, fit and function. The mount was verified with each connection type along with qualitative physical load testing that validated the FEA simulation results.

 

Conclusion

As mobile operators intensify their 5G network roll-out efforts, site and platform engineers are under pressure to make the best use of the available tower and pole space in their macro networks. That will mean finding ways to add more equipment to overcrowded structures.

CommScope’s Atlas single-connection monopole platform uses standard structural members and innovative engineering to provide the level of high-load and simplified construction needed. After rigorous design using RISA-3D, SolidWorks and FEA simulation with ANSYS, the Atlas monopole mount was physically tested under loads to simulate 180 mph wind speed. Additionally, it was analyzed, rated, and verified by a third-party architectural and engineering firm to meet TIA-5053 requirements. This makes the Atlas CommScope’s highest-rated single-point monopole platform. More importantly, it provides mobile operators another important tool — helping them meet the industry demand for emerging 5G antenna-integrated radio units.


Jyoti Ojha, P.E., is a CommScope principal structural engineer. Visit www.commscope.com. © 2021 CommScope, Inc. All rights reserved.

 

 

Smart Cities Connectivity to Boost DAS Market: ReportLinker

ReportLinker’s report, “Distributed Antenna Systems Market — Growth, Trends and Forecasts (2020 – 2025)” says that distributed antenna system (DAS) networks have helped industries overcome shortcomings of internet connectivity and high bandwidth. This help is the reason why DAS is finding further acceptance in various other regions and industries, according to ReportLinker.

“One of the major factors for the penetration of DAS has been the increasing demand for high-speed connectivity everywhere,” information from the company reads. “As technology has proved to be cost-effective, even governments across the globe have been proactively deploying this antenna system.”

Some of the advantages that are driving the demand for DAS are better-defined coverage, fewer coverage holes, same coverage using lower overall power, along with individual antennas that do not need to be elevated as high as a single antenna for the equivalent coverage, the report reads.

ReportLinker said that in the United States — especially in Las Vegas — in-building DAS has become the focus of many of the Las Vegas resorts and venues to keep customers connected with the outside world. Similar developments are expected to follow in other regions in places that have high commercial value and that want increased customer footfall with better connectivity options, according to the report.

“In smart cities, DAS has emerged as an essential solution that helps create the required infrastructure for achieving connected systems,” information disclosed by ReportLinker reads. “Smart buildings, hospitals, shopping complex and vehicular traffic management need continuous communication and, thus, are expected to boost the market demand. Several smart city projects and initiatives are ongoing across the globe, and by 2025, it is expected that there would be around 30 global smart cities, and 50 percent of these would be located in North America and Europe.”

ReportLinker said that these steps are supported by global investments, which, according to the Organisation for Economic Co-operation and Development, would be about $1.8 trillion, between 2010 and 2030, for all infrastructure projects in urban cities. This is one of the major factors pushing the demand for distributed antenna systems, primarily owing to their application in smart cities connectivity applications.

Public Safety DAS

Public safety DAS networks provide wireless service via an antenna system, particularly to buildings, in order to ensure that emergency responders can maintain wireless communications within a building structure and on the job during emergencies.

“Enabling emergency communication is crucial when it comes to the men and women who are often the first on a scene when it comes to public safety,” information from ReportLinker reads. “In case of public safety, DAS design will need to meet the system coverage requirements of both the National Fire Protection Association (NFPA) and the International Fire Code (IFC). Although IFC dictates that 95 percent of coverage is needed in all areas, NFPA dictates that 99 percent coverage is required in areas of vital importance, such as those designated by the local fire department.”

According to ReportLinker, wth higher deaths due to fires in countries such as the United States, DAS networks are expected to witness an increased adoption, owing to the rising significance of public safety. The DAS market is also witnessing an increase in penetration of high-speed internet technologies, ReportLinker said, such as 4G and 5G, which has led to modifications of public safety in-building wireless DAS to support such internet speeds. This, in turn, has enabled a more extended reach and has been promoting the growth of the market, ReportLinker said.

“Furthermore, the growing trend of smart city development in emerging economies has been leading to the faster application of public safety in-building wireless DAS in several residential and commercial building complexes,” ReportLinker added. “This has again positively influenced the growth of the global public safety in-building wireless DAS market.

Competitive Landscape

ReportLinker stated the DAS market is highly fragmented because of increasing mobile data traffic, a proliferation of connected devices resulting from the internet of things (IoT), a rising need for spectrum efficiency and growing consumer demand for extended network coverage and uninterrupted connectivity.

“Many companies are now entering in to the market with an array of scope,” ReportLinker said. “Some of the key players in the market are Anixter, CommScope, PT Tower Bersama Infrastructure TBK, Corning and Antenna Products Corporation.”

Resource:

“Distributed Antenna Systems Market — Growth, Trends and Forecasts (2020 – 2025)”

Source: ReportLinker

Tech Convergence Guides CommScope in Reorganization

By J. Sharpe Smith, Senior Editor

CommScope will begin the new year and the new decade reorganized into four segments—Venue and Campus Networks; Broadband Networks; Outdoor Wireless Networks and Home Networks — aligned with what it believes will be the primary growth opportunities for networks in the future.

The change will position the company to take advantage of some of the fastest growing markets, including hyperscale, multi-tenant and cloud data centers; macro and metro layer cellular networks; in-home networks; and professional services.

The reorganization was informed by the acquisition of Arris, which operated in the core-to-edge network solutions space. But CommScope’s reasoning behind the reorganization is really to take advantage of the convergence of the wireless and wireline worlds.

“What were disparate networks are now converged,” said Matt Melester, senior vice president, CommScope Technology Strategy. “RAN solutions are beginning to look more like data centers. The same thing is happening in the cable industry. The same thing they are doing on the RAN side is being done on the DOCSIS [Data Over Cable Service Interface Specification] side, in terms of virtualization and splitting the stack.”

Prior to the Arris acquisition, CommScope was divided into CommScope Connectivity Solutions (CCS) and CommScope Mobility Solutions (CMS). After the close of the acquisition, the company added three segments – Customer Premise Equipment, Network and Cloud and Ruckus.

“Previously, we were aligned somewhat by products and somewhat by customers,” Melester said. “We are now trying to align more on markets, because the customers change. For example, we used to sell 90 percent of our DAS and small cell systems to carriers, but now we selling more and more to enterprises.”

CommScope now has a view of the overall communications network from the cloud to the core to the consumer. “We are playing in all those spaces. We wanted to learn the entire network, not just a piece of it,” Melester said.

With that overview, CommScope will be looking for solutions in trends that cut across multiple segments of telecommunications, such as virtualization, cloud, machine learning and analytics.

“Our machine learning analytics framework will be same across all segments, but there will be the ability to differentiate for different business segments. It will be an open source community within CommScope,” Melester said. “Equipment and capabilities can be leverage across different disciplines. What CommScope has to leverage is the visibility of these trends across different business units. Take good ideas in one space and move them to another space.”

The combination of CommScope and ARRIS, which was announced in November 2018 and completed in April 2019, created a massive company with $11.3 billion in revenue. The next step is to create a nimble company to take advantage of the synergies.

“The organization of the company can either impede or facilitate innovation. We don’t want one division to have to learn something that another group has already learned,” Melester said. “Through the CTO’s office we are building cross-segment teams to work on a common goal. That might be a common platform or common framework. Hopefully breaking down silos to work on technology will get us faster to market.”

Private LTE Demonstrated on Microsoft Azure

CommScope’s Ruckus CBRS portfolio and Attabotics’ 3D robotic supply chain automation system were demonstrated as part of Microsoft Azure capabilities for private LTE networks during Microsoft Ignite, the Microsoft annual gathering of technology leaders. held Nov. 4-8, 2019 in Orlando, Florida.

Ross Ortega, partner PM, Azure Networking said, “The Microsoft Azure-based private LTE solution builds on decades of Microsoft enterprise success stories. In collaborating with CommScope and Metaswitch, we see opportunity to enable IoT applications and take advantage of the security, latency and bitrates provided by private LTE networks for our mutual customers.”

CommScope’s Ruckus Citizens Broadband Radio Service (CBRS) portfolio enables enterprises to easily deploy private LTE networks to support innovative Internet of Things (IoT) applications using wireless spectrum recently made available by the United States Federal Communications Commission (FCC). Designed with enterprise IT operations in mind, this new portfolio greatly simplifies the management and deployment of a cellular network. Now, enterprise IT administrators have a new wireless tool that can be leveraged for a wide variety of applications that were not previously possible.

“We are proud that the Ruckus CBRS LTE portfolio was part of this innovative Microsoft demo at Ignite 2019,” said Joel Lindholm, vice president of CBRS Business at CommScope. “Using the end to end encryption of the LTE network, enterprise customers can feel comfortable with the secure nature of this new network. This demonstration highlights how private networks can be used by enterprise customers for automated applications such as Attabotics.”

The Ruckus CBRS portfolio uses separate dedicated spectrum from licensed cellular and Wi-Fi, thus providing cellular-like reliability, mobility, security and quality of service, but with the simplicity of Wi-Fi. Integration of the Ruckus CBRS portfolio with Microsoft Azure’s networking and edge connectivity solutions will enable enterprises to successfully address challenging and critical use cases with dedicated, secure, ultra-high-quality private LTE networks

Tessco, CommScope Collaborate to Meet Public Safety In-building Wireless Needs

State and local building authorities are increasingly mandating public safety wireless systems for new and even existing commercial structures. To ensure that emergency responders have continuous communication, these systems must meet strict criteria for continuous operation during fires, floods and other emergencies. However, as non-commercial systems they provide no direct return on investment, therefore building owners seek simple and cost-effective solutions.

The CommScope bi-directional amplifier has been designed to meet this need. As a repeater-based solution, it takes signals over the air and thus requires a minimal footprint within the building. It comes in a range of frequency band and power options, supports battery backup, and is fully compliant with relevant National Fire Protection Association (NFPA) and National Electrical Manufacturers Association (NEMA) standards. It is software upgradeable.

TESSCO Technologies secured the entire first year production capacity for CommScope’s public safety product, a bi-directional amplifier that addresses a key need for reliable, cost-effective public safety wireless systems.

Tessco, as a distributor of wireless infrastructure products, provides public safety solutions consisting of the bi-directional amplifier, cabling, antennas and other components through a network of value-added resellers.

“Tessco has been engaged with us over the last two years to bring this product to market. This, combined with Tessco’s commitment to the public safety market, will help meet the growing need for reliable, cost-effective public safety wireless systems,” said Michael Shumate, vice president of distributed coverage and capacity systems for CommScope’s Mobility Solutions.

Tessco is now accepting orders with expected shipping in late Q4 or early in the first quarter of 2020.