Communication mechanism using spectrum sharing

An apparatus comprising:

• at least one processor,
• and
• at least one memory for storing instructions to be executed by the processor, wherein
• the at least one memory and the instructions are configured to, with the at least one processor, cause the apparatus to at least:
• receive and process a request to use a part of a spectrum of a second communication network by a first communication network on the basis of a spectrum cooperation relationship between the first communication network and the second communication network,
• receive and process a service coordination information related to the request to use a part of the spectrum, the service coordination information indicating a plurality of offered compensation measures based on roaming mechanism offered by the first communication network to compensate the second communication network for allowing the first communication network to use a part of the spectrum of the second communication network, wherein the plurality of offered compensation measures include at least one of an offer of communication resources to allow user equipments (UEs) of the second communication network to roam to the first communication network, and an offer to switch traffic of one or more UEs from the first communication network to the second communication network,
• decide, on the basis of at least one of the request to use a part of the spectrum and the service coordination information, which part of the spectrum of the second communication network is granted to the request,
• select, on the basis of the service coordination information, an accepted compensation measure of the plurality of offered compensation measures based on roaming mechanism, and
• cause to transmit a response to the request to use a part of the spectrum of the second communication network and a service coordination response informing about the accepted compensation measure based on roaming mechanism.

A method comprising:

• receiving and processing a request to use a part of a spectrum of a second communication network by a first communication network on the basis of the spectrum cooperation relationship between the first communication network and the second communication network,
• receiving and processing a service coordination information related to the request to use a part of the spectrum, the service coordination information indicating a plurality of offered compensation measures based on roaming mechanism offered by the first communication network to compensate the second communication network for allowing the first communication network to use a part of the spectrum of the second communication network, wherein the plurality of offered compensation measures include at least one of an offer of communication resources to allow user equipments (UEs) of the second communication network to roam to the first communication network, and an offer to switch traffic of one or more UEs from the first communication network to the second communication network,
• deciding, on the basis of at least one of the request to use a part of the spectrum and the service coordination information, which part of the spectrum of the second communication network is granted to the request,
• selecting, on the basis of the service coordination information, an accepted compensation measure of the plurality of offered compensation measures based on roaming mechanism, and
• causing to transmit a response to the request to use a part of the spectrum of the second communication network and a service coordination response informing about the accepted compensation measure based on roaming mechanism.