Network node and method in a wireless communications network

A network node configured for handling a Category M (Cat-M), User Equipment (UE) in relation to a subframe configuration in a wireless communications network, which subframe configuration is adapted to be a Multicast-Broadcast Single-Frequency Network (MBSFN), subframe configuration configured for operating in a first Radio Access technology (RAT), and a second RAT, and which subframe configuration is adapted to comprise a first MBSFN pattern, the network node further being configured to:

• configure a first RAT UE with the first MBSFN pattern and to perform rate-matching around at least one Cell-specific Reference Signal (CRS), Port of the second RAT in all subframes that are not part of the first MBSFN pattern,
• broadcast information about the first MBSFN pattern in a second RAT cell, to a second RAT UE and the Cat-M UE which is of the second RAT,
• when obtaining an updated subframe configuration comprising an updated MBSFN pattern:
• refrain from broadcasting information about the updated MBSFN pattern to the Cat-M UE, and continue to broadcast information about the first MBSFN pattern in the second RAT cell to the Cat-M UE,
• broadcast in the second RAT cell, information about the updated MBSFN pattern to the second UE, and
• transmit in the second RAT cell, second RAT CRS on the at least one Port in the updated MBSFN pattern for the Cat-M UE to use.