The goal of the MUSIC project is to lay the foundation for the next generation wireless backhauling networks, meeting the requirements in the next decade.
The majority of the foreseen 1000-fold growth of wireless network capacity in next decade is expected to be met by deploying heterogeneous networks including small cells. They will be embedded into the macro-cell network at locations with higher user densities or limited coverage. Optical fiber backhauling is favorable, but the deployment is often costly and time consuming, and for a majority of the European sites, fiber is currently not available.Thus, cost efficient, future-proof alternatives are essential for a successful deployment of mobile broadband in Europe.
Line-of-sight (LoS) microwave links is today the most common wireless backhauling technology, and the LoS technology evolution involves new wider frequency bands and increased spectral efficiency which will enable also future LoS deployments to backhaul high capacity macro base station sites. However, in roughly half of the wireless backhaul links for small cells, there is no LoS to the next macro-cell site. Current None-Line-Of-Sight (NLOS) backhauling uses frequencies below 6 GHz, but bandwidth is not enough to meet future demands, and these bands are also attractive for radio access. On the other hand, more bandwidth is available at higher frequencies >10 GHz.
The objective of the MUSIC project is to demonstrate how to increase the data rates in small cell backhauling scenarios despite the increased path loss at higher frequencies. Therefore, the properties of wireless backhaul channels will be investigated and specific attention is paid to multiple antennas. A channel model will be derived and a new system concept will be developed and evaluated. Key features will be implemented on an experimental prototype and tested in the field.
The MUSIC project consortium consists of Swedish and German partners including a network operator, two vendors, two SMEs, a university and a research institute, and it is funded in Sweden by VINNOVA within the CELTIC+ program.