ECC Consultation Document: Protection of FS/FSS Services

The document presents technical and regulatory guidance to ensure harmonious coexistence between low- and medium-power broadband wireless systems (LMPW) and fixed services (FSS) in the 3800-4200 MHz frequency band, especially considering cross-border deployments.

The recommendation is based on the recognition that both the fixed and satellite services already operate in this band under primary and secondary allocations under the Radio Regulations, and that there are both civil and military applications.

Since LMPW systems pose potential interference risks, the document establishes that applying generic technical conditions is not sufficient; case-by-case coordination with FS and FSS stations is required to avoid interference.

To this end, the use of coordination and exclusion contours is proposed, which geographically delimit the areas in which LMPW systems need to be coordinated before activation. These contours must be calculated based on technical factors such as the effective radiated power (e.i.r.p.), the antenna gain, the height of the base stations, and the specific characteristics of the terrain.

WHOM DOES IT IMPACT?

The direct impact is on satellite service operators, fixed service point-to-point links, and national spectrum administrations, manufacturers, and operators of WBB LMP infrastructure.

CONCLUSION:

This recommendation is an essential tool to ensure the efficient coexistence of new WBB LMP network usage with established services in the 3800-4200 MHz band. It defines precise technical methodologies and highlights the need for national and international coordination.