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.