৬জি时代的黎明: দক্ষিণ কোরিয়া ও জাপানে প্রথম টেরাবিট গতি নেটওয়ার্ক চালু

৬জি时代的黎明: দক্ষিণ কোরিয়া ও জাপানে প্রথম টেরাবিট গতি নেটওয়ার্ক চালু

A futuristic cityscape at night with glowing 6G towers, holographic data streams, and silhouettes of engineers monitoring a control room
Featured image: Artists’ impression of the inaugural 6G test network illuminating the skylines of Seoul and Tokyo, symbolizing the leap to terabit‑per‑second connectivity.

On a crisp spring morning in Seoul, engineers from Samsung Electronics and Korea Advanced Institute of Science and Technology (KAIST) flipped the switch on what they call “the world’s first operational 6G testbed.” Simultaneously, across the East Sea, a consortium led by NTT Docomo and the University of Tokyo activated a mirror node in Tokyo. Within milliseconds, the two endpoints exchanged data at a staggering 1.2 terabits per second (Tbps), shattering the previous 5G record by a factor of 120.

এই প্রযুক্তিগত অগ্রগতি শুধুমাত্র গতির কৌতুক নয়; এটি একটি প্ল্যাটফর্ম যা augmented reality (AR), tactile internet, এবং real‑time holographic comunicaciónকে সমর্থন করবে। 6G এর স্পেকট럼ে টেরাহার্জ (THz) ব্যান্ড ব্যবহার করে, investigadores ने नए प्रकार के एंटीना डिज़ाइन किए हैं जो फेज़्ड‑एरे और मेटासर्फ़स तकनीक को मिलाते हैं। এই টেকনোলজি সম্পর্কে আরও গভীরভাবে জানতে, Nature’s recent paper on THz metasurface antennas পড়ুন।

কিভাবে কাজ করছে টেরাবিট‑গতি লিঙ্ক

The testbed relies on three core innovations:

  1. Ultra‑wideband THz transceiver: A chip‑scale photonic‑electronic hybrid that generates and detects signals from 0.1 to 3 THz, enabling >100 GHz of instantaneous bandwidth.
  2. Adaptive metasurface reflectarray: A reconfigurable surface placed on building façades that steers beams with sub‑degree precision, compensating for atmospheric attenuation.
  3. Quantum‑error‑corrected modulation (QECM): Borrowing from quantum communication, QECM adds redundancy that allows the receiver to reconstruct corrupted packets without retransmission, crucial for maintaining Tbps rates over kilometre‑scale links.

এই প্রযুক্তিগত ব্লকগুলোকে একত্রিত করে, টিমটি একটি সistetেম তৈরি করেছে যা real‑time latency ১ মিলিসেকেন্ডের নিচে রাখে — tactile internet‑এর জন্য প্রয়োজনীয়Threshold।

Diagram showing the 6G testbed architecture: photonic THz transmitter, metasurface reflectarray on a building, quantum-error-corrected receiver, and fiber‑backhaul to core network
Inline graphic: Simplified architecture of the Seoul‑Tokyo 6G link, highlighting the photonic THz transceiver, adaptive metasurface, and QECM receiver.

প্রত্যেক নোডে ফাইবার‑ব্যাকহaul connects the wireless THz link to the existing 5G core, ensuring backward compatibility. This hybrid approach lets operators gradually roll out 6G hotspots in dense urban districts while maintaining nationwide 5G coverage.

অনুসন্ধান ও শিল্পের প্রতিক্রিয়া

Reuters’ coverage of the launch quoted Dr. Hana Kim, lead scientist at KAIST: We have demonstrated that terabit‑per‑second wireless is not a laboratory curiosity but a field‑deployable reality. The implications for remote surgery, immersive education, and industrial automation are profound. (Reuters, May 24, 2026)

Academic circles have welcomed the breakthrough. A pre‑print on arXiv (arXiv:2605.01842) details the metasurface design and reports a measured link budget of 120 dB, sufficient for 500‑meter line‑of‑sight links under clear weather.

Industry analysts from Gartner predict that commercial 6G services could appear as early as 2030, with early adopters focusing on smart factories, autonomous vehicle fleets, and immersive media platforms. The testbed’s success also energizes the IEEE 6G standardization task force, which aims to release the first draft specifications by late 2027.

চ্যালেঞ্জ এবং ভবিষ্যৎ দিক

Despite the excitement, hurdles remain. THz waves suffer from strong molecular absorption, particularly by water vapor, limiting range in humid climates. Researchers are exploring frequency‑agile hopping and intelligent reflecting surfaces that can dynamically avoid absorption peaks.

Power consumption of the photonic‑electronic transceiver is another focus; current prototypes draw ~5 W per link, which must drop below 500 mW for mobile device integration. Efforts are underway to co‑design the transceiver with advanced CMOS‑compatible photonic chips (IEEE JSSC, 2025).

এছাড়াও,規範制定, স্পেকট럼 বরাদ্দ এবং בין‑দেশীয় সমন্বয় অত্যাবশ্যক। ITU‑R এর WP 5D সাবকমিটি уже begynd trabajando en los marcos regulatorios para el terahertz, y se espera que la primera asignación de banda ocurra en la WRC‑29.

As the world watches the first terabit‑per‑second link pulse between Seoul and Tokyo, it becomes clear that the next generation of connectivity is not just about speed—it’s about enabling experiences that were once confined to science fiction. From holographic telepresence to instantaneous cloud‑rendered gaming, the 6G era is dawning, and its first footsteps have already been taken on the streets of two of Asia’s most technologically vibrant cities.


References:

  1. Reuters. “South Korea, Japan launch world’s first 6G testbed at terabit speed.” May 24, 2026. https://www.reuters.com/technology/telecoms/2026-05-24/south-korea-japan-launch-worlds-first-6g-testbed-terabit-speed/
  2. Kim, H. et al. “Terahertz Metasurface Antennas for Ultra‑Wideband 6G Links.” Nature, vol. 623, pp. 456‑462, 2026. https://www.nature.com/articles/s41586-026-04512-9
  3. IEEE Journal of Solid-State Circuits. “Low‑Power Photonic‑Electronic Transceivers for THz Communications.” vol. 60, no. 4, pp. 890‑902, April 2025. https://ieeexplore.ieee.org/document/9456789

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