Accessing spectrum around 3.5 GHz (the so-called CBRS band) is performed following standards defined in WinnForum. A CBSD will first register with the SAS and provide its location information among other registration parameters, and then it will ask the SAS to grant access in a certain channel. Before granting access, the SAS will use information from the ESC network to detect incumbent activity in the area where CBSD operates. The SAS will also use measurement reports from the other CBSDs in the same area to determine the level of interference in a certain channel as well as if the channel needs to be protected due to PAL user activity. A coexistence management (CXM) function or the Domain Proxy has the possibility to select which channel the CBSD is to use, and the SAS has the responsibility to ensure interference protection according to the rules set out in FCC part 96. In relation to FIG. 1 the CXM function could be collocated with the Domain Proxy, with a Domain Manager, or with any of the SASs, or with another entity, or be provided as a separate entity; the CXM could generally be regarded as a separate logical entity that manages co-existence between GAA devices operating in Long Term Evolution Time Division Duplex (LTE-TDD) mode.

However, there is still a need for achieving improved spectral efficiency in communications networks.

An object of embodiments herein is to provide efficient channel selection in a communications network.