Initial access configuration for coexistence of multiple wireless communication systems

A method, comprising:

• determining, by a control system comprising a processor, a capability of a device configured to operate according to a first communication protocol;
• selecting, by the control system, a numerology of a group of numerologies for transmission of information from a base station device in a subframe of a frame,
• wherein the group of numerologies comprises at least four different configurations of synchronization signal block spacing, synchronization signal block bandwidth and synchronization signal block duration,
• wherein the frame is associated with communications in accordance with the first communication protocol,
• wherein the selecting is based on a combination of the capability of the device and a type of the subframe of the frame,
• wherein the numerologies of the group are distinct combinations of frequency subcarrier spacing for synchronization signal blocks provided for initial access to usage of a second communication protocol and placement locations of the synchronization signal blocks and
• wherein the type of the subframe is identified from a group of types of subframes indicating that the subframe is a downlink subframe, indicating whether the device comprises a multicast-broadcast single-frequency network subframe capability, and indicating whether the device comprises a discovery signal measurement capability that enables fast Long Term Evolution SCell activation and deactivation.