An apparatus for coordinating interference handling in an optical wireless communication network, wherein the apparatus is configured to negotiate a configuration of interference handling functions, being a distribution of the interference handling functions between a central interference handling entity and a distributed interference handling entity , and to set an interference handling operation mode based on the negotiated configuration and communicate said mode to the central interference handling entity and the distributed interference handling entity , wherein the negotiation comprises an exchange of interference handling capabilities of the central interference handling entity and of the distributed interference handling entity with the apparatus; and establishing the configuration of interference handling functions based thereon; wherein the interference handling operation mode determines a distribution of the interference handling functions between the central interference handling entity and the distributed interference handling entity , wherein the interference handling functions relate to different levels comprising: a first interference handling function of a highest level for assigning time slots or time channels to access points of the optical wireless communication network, a second interference handling function of a middle level for allocating allowed time regions to access points for each endpoint or group of endpoints , a third interference handling function of a lowest level for scheduling time slots to endpoints for each access point , where an interference handling function of a lower level is dependent on an outcome of an interference handling function of a higher level, and wherein interference handling functions assigned to the central interference handling entity have a higher level than interference handling functions assigned to the distributed interference handling entity . wherein the negotiation comprises an exchange of interference handling capabilities of the central interference handling entity and of the distributed interference handling entity with the apparatus; and establishing the configuration of interference handling functions based thereon; wherein the interference handling operation mode determines a distribution of the interference handling functions between the central interference handling entity and the distributed interference handling entity , wherein the interference handling functions relate to different levels comprising: a first interference handling function of a highest level for assigning time slots or time channels to access points of the optical wireless communication network, a second interference handling function of a middle level for allocating allowed time regions to access points for each endpoint or group of endpoints , a third interference handling function of a lowest level for scheduling time slots to endpoints for each access point , where an interference handling function of a lower level is dependent on an outcome of an interference handling function of a higher level, and wherein interference handling functions assigned to the central interference handling entity have a higher level than interference handling functions assigned to the distributed interference handling entity . <EOS>