New speed record set under real-world conditions

Record data transfer speed in fiber optic network using TUM algorithm.

Each fiber strand of an optic cable can be further divided in more than 100 channels. (image: M-Net)
Each fiber strand of an optic cable can be further divided in more than 100 channels. (image: M-Net)

Using a signal processor developed at TUM, with a chipset, scientists made a new record of sending data through a fiber-optic network at a speed of 500 gigabits per second over a single wavelength channel.

In an intercity field experiment between Munich and Regensburg, the network operator M-Net and the telecommunications company Nokia have achieved a big milestone for data transmission via fiber optic cable under real-world conditions: a transfer speed of 500 gigabits per second (Gbit/s) with a single wavelength.

The 5G networks are the next generation of mobile internet connectivity, offering faster speeds and more reliable connections on smartphones and other devices than ever before. 5G will provide extreme speed, better battery life, better connectivity low latency than 4G.

In fiber optic cables, fast speeds are possible only with right data transmission technology. That is the place probabilistic constellation shaping (PCS) comes in. This method, created around five years prior at the TUM Department of Electrical and Computer Engineering, utilizes likelihood hypothesis to realize the optimal balance of transfer speed, dependability and vitality use for each flag. It additionally applies mistake rectification strategies to reach considerably higher information transmission rates.

The recent Regensburg/Munich experiment was conducted under real-world conditions, with the signal transmitted across approximately 320 kilometers of existing fiber optic cables. M-Net became the first network operator to test a Nokia signal processor that uses PCS technology.

Professor Gerhard Kramer of the Chair of Communications Engineering at TUM said, “It is truly remarkable for a new algorithm to be used in products within just five years. Without doubt, one reason for this is the fact that PCS permits a significant increase in data transfer rates without having to make changes to the cables themselves. Furthermore, this is indicative of the extraordinary quality of the algorithm.”