NTT DoCoMo, a leading Japanese mobile network operator, has successfully tested a hybrid quantum-computing-based network optimization solution from D-Wave Quantum. This innovative approach promises to enhance the company’s network performance, reducing paging signal congestion by 15% at peak calling times. DoCoMo plans to deploy this hybrid quantum solution at its branch offices in the coming months.
The testing spanned several regions in Japan, including Tokai, Chugoku, and Kyushu. The new method compared favorably against traditional optimization techniques. The hybrid-quantum technology optimized base station tracking areas by processing extensive historical data on device movements. This allowed DoCoMo to predict future device movement patterns and determine the best base station combinations for reconnecting devices.
“The data volume transmitted through paging signals has been increasing, and if there is no response from the terminal, data must be resent over a wider area. In addition, the recent proliferation of smartwatches and IoT devices has resulted in an increased volume of paging signals, which has put a burden on base station facilities, generating an issue,” DoCoMo explained in a recent report. This marks the first algorithm using a quantum computer to reduce paging signals.
The comparison between general-purpose solvers and the D-Wave hybrid solver is staggering. A general-purpose solver took 27 hours to complete the task, whereas D-Wave’s hybrid solver did it in just 40 seconds. The pilot results revealed quantum optimization’s effectiveness, connecting approximately 1.2 times more terminals during high call volumes with a 15% reduction in paging signals.
“These test results showed that quantum optimization could facilitate a significant performance improvement in our networks. We anticipate that our quantum optimization strategy will further refine network efficiency, allowing us to maintain high-quality service without additional infrastructure investments as network traffic increases,” noted Takatoshi Okagawa, Director of Research and Development Strategy at DoCoMo. He added that the company aims to set a new standard in the telecommunications industry with D-Wave’s technology.
In light of these promising results, DoCoMo is exploring other applications of quantum optimization. Potential areas include finance, retail, traffic, and logistics. This move is indicative of the growing trend toward integrating advanced computational technologies to handle increasing operational complexities.
“Telcos are faced with a slew of increasing operational complexities — from 5G implementation to ever-shifting consumer demands — and need novel solutions to maintain a competitive edge,” commented Dr. Alan Baratz, CEO of D-Wave. “DoCoMo’s successful pilot sends a clear signal — that today’s quantum technologies are capable of solving telcos’ complex optimization problems, with the potential to elevate customer satisfaction, maintain network performance and mitigate rising infrastructure costs.”
