Friday, January 6, 2023

NTT refines its Coherent Ising Machine

Scientists from the NTT Research Physics & Informatics (PHI) Lab and Tokyo Institute of Technology (Tokyo Tech) have presented a new algorithm that successfully combines amplitude control feedback and Zeeman terms to overcome inherent limits of a Coherent Ising Machine (CIM). (The Ising model is a mathematical abstraction of magnetic systems composed of competitively interacting spins, or angular momentums of fundamental particles.)

“We are pleased with the results of our ongoing collaboration with Dr. Aonishi’s Lab at Tokyo Institute of Technology and with this research in particular, which expands the CIM’s reach to a wider array of practical applications,” said PHI Lab Director Yamamoto. “It is important that theoretical work and numerical simulation models of the CIM keep pace with the scale of experimental results; there is more to do, but the work represented in this article is a significant step in that direction.”

NTT notes that have been various attempts to harness a CIM’s optical pulses, which are mutually coupled by dissipative circuits rather than unitary gates, to solve combinatorial optimization problems, such as the traveling salesman problem, lead optimization in drug discovery, multiple-input multiple-output (MIMO) optimization for wireless communications and compressed sensing for medical imaging. In the laboratory realm, a landmark result of an experimental measurement feedback CIM with 100,000 spins was achieved in 2021. The theoretical schemes proposed in this article, by contrast, apply to modeling methodologies that simulate the behavior of a physical CIM, which allow scientists to study a CIM without needing to build one. Some of the article’s more technical findings concern the performances of those models. The primary takeaway, however, is that the proposed amplitude control scheme increases the performance for a 16-spin CIM with Zeeman terms, especially when those terms are competing against mutually coupling coefficients.

etisalat tests 100G PON with Nokia

Etisalat UAE has hosted a Nokia Bell Lab’s PON proof of concept (PoC) demonstration that achieved speeds up to 100 Gbps on a single wavelength -- four times faster than the most advanced 25G PON implementations today.

Nokia leverages digital signal processing (DSP) techniques to achieve 100 Gbps on a single wavelength. Nokia believes 100G could be commercially available in the 2030s.

The Nokia Bell Labs 100G PON prototype is the world’s first application of flexible rate transmission in a PON network. Flexible rate transmission works by grouping fiber modems (ONUs) that exhibit similar physical network characteristics (e.g., loss or dispersion) and makes data transmission more efficient. Using flexible rate transmission results in lower latency on a PON and cuts power consumption in half -- two essential characteristics for fiber networks that have a rapidly growing role in the massive delivery of fixed and mobile broadband services.

Marwan Bin Shakar, Senior Vice President/Access Network Development, etisalat by e& said: “Fiber networks are fast evolving into becoming the backbone of the entire telecommunications sector as they play an important role in delivering any service to any end point, including residences, businesses, and cell sites. As their use case evolves, they must become quicker, smarter, and more cost-effective. We are thrilled to have showcased a working prototype for 100G PON with Nokia. Our partnership with Nokia is a demonstration of our commitment to maximise value for our customers and bring positive change to their lives in the age of digitalisation. Through our partnership, we are looking forward to continuing our efforts in bringing in the best-in-class solutions to our customers and enabling the adoption of innovative technological solutions within the UAE and the region.”

Samer Makke, Head of the Customer Team for etisalat by e&, UAE, at Nokia, said: “etisalat by e& is a pioneering operator in the region and we are proud to have demonstrated our industry-first prototype technology with the company. Fiber broadband continues to evolve and will play a critical role in enabling services for enterprise customers, premium consumers, and supporting 5G rollouts. 10G XGS-PON is now mainstream; the first 25G city is a reality; and 50G and 100G are being developed. This just shows the unlimited potential of fiber broadband.”

AT&T targets fiber access with BlackRock JV

AT&T and BlackRock Alternatives have formed a joint venture to deliver fiber access outside of AT&T’s traditional 21-state wireline service footprint. 

The newly formed joint venture — Gigapower, LLC — will deliver fiber services to internet service providers (ISPs) and other businesses using a commercial open access platform. The Gigapower fiber deployment will be incremental to AT&T’s existing target of 30 million-plus fiber locations, including business locations, by the end of 2025. Combined with existing efforts within AT&T’s 21-state footprint, this capital efficient network deployment will advance efforts to bridge the digital divide, ultimately helping to provide the fast and highly secure internet people need. This network expansion will also help spur local economies in each of the communities in which Gigapower operates.

“Now more than ever, people are recognizing that connecting changes everything” said John Stankey, CEO of AT&T. “With this joint venture, more customers and communities outside of our traditional service areas will receive the social and economic benefits of the world’s most durable and capable technology to access all the internet has to offer.”

“Fiber is the lifeblood of digital commerce,” said Bill Hogg, CEO of Gigapower. “We have a proven team of professionals building this scalable, commercial open access wireline fiber network. Our goal is to help local service providers provide fiber connectivity, create the communications infrastructure needed to power the next generation of services and bring multi-gig capabilities to help close the gap for those who currently are without multi-gig service.”

Qualcomm and Iridium to bring 2-way satellite to Android

At CES 2023, Qualcomm unveiled Snapdragon Satellite, bringing satellite-based two-way capable messaging for premium Android smartphones. 

Snapdragon Satellite will provide global connectivity using mobile messaging from around the world1, starting with devices based on the flagship Snapdragon 8 Gen 2 Mobile Platform.

The service will be supported by the fully operational Iridium satellite constellation using its L-band spectrum. Qualcomm will provide Snapdragon 5G Modem-RF Systems.

“Robust and reliable connectivity is at the heart of premium experiences. Snapdragon Satellite showcases our history of leadership in enabling global satellite communications and our ability to bring superior innovations to mobile devices at scale,” said Durga Malladi, senior vice president and general manager, cellular modems and infrastructure, Qualcomm Technologies, Inc. “Kicking off in premium smartphones later this year, this new addition to our Snapdragon platform strongly positions us to enable satellite communication capabilities and service offerings across multiple device categories.”

Beyond smartphones, Snapdragon Satellite can expand to other devices, including laptops, tablets, vehicles and IoT. As the Snapdragon Satellite ecosystem grows, OEMs and app developers can differentiate and offer unique branded services taking advantage of satellite connectivity. 

Snapdragon Satellite is planned to support 5G Non-Terrestrial Networks (NTN), as NTN satellite infrastructure and constellations become available.

“Iridium is proud to be the satellite network that supports Snapdragon Satellite for premium smartphones,” said Matt Desch, CEO, Iridium. “Our network is tailored for this service – our advanced, LEO satellites cover every part of the globe and support the lower-power, low-latency connections ideal for the satellite-powered services enabled by the industry-leading Snapdragon Satellite. Millions depend on our connections every day, and we look forward to the many millions more connecting through smartphones powered by Snapdragon Satellite.”