A method of coordinating handover, comprising: determining, at a first controller that is associated with a first radio access network, RAN, cell, a first handover parameter value that is for use in determining whether to cause handover from the first RAN cell to a second RAN cell having a different radio access technology, RAT, than the first RAN cell; and transmitting, from the first controller to a second controller that is associated with the second RAN cell, information relating to the first handover parameter value; characterized by: transmitting, from the first controller to the second controller, a value of a quality of service, QoS, parameter or a user equipment, UE, capability parameter associated with the information, wherein the QoS parameter indicates a level of service provided to or expected by a user equipment, UE, being served by the first RAN cell or the second RAN cell, and wherein the UE capability parameter indicates UE capability; and receiving, at the first controller from the second controller, an indication of whether the second controller has adjusted a second handover parameter value based on the transmitted information, wherein the second handover parameter value is for use in determining whether to cause handover from the second RAN cell to the first RAN cell. determining, at a first controller that is associated with a first radio access network, RAN, cell, a first handover parameter value that is for use in determining whether to cause handover from the first RAN cell to a second RAN cell having a different radio access technology, RAT, than the first RAN cell; and transmitting, from the first controller to a second controller that is associated with the second RAN cell, information relating to the first handover parameter value; characterized by: transmitting, from the first controller to the second controller, a value of a quality of service, QoS, parameter or a user equipment, UE, capability parameter associated with the information, wherein the QoS parameter indicates a level of service provided to or expected by a user equipment, UE, being served by the first RAN cell or the second RAN cell, and wherein the UE capability parameter indicates UE capability; and receiving, at the first controller from the second controller, an indication of whether the second controller has adjusted a second handover parameter value based on the transmitted information, wherein the second handover parameter value is for use in determining whether to cause handover from the second RAN cell to the first RAN cell. transmitting, from the first controller to the second controller, a value of a quality of service, QoS, parameter or a user equipment, UE, capability parameter associated with the information, wherein the QoS parameter indicates a level of service provided to or expected by a user equipment, UE, being served by the first RAN cell or the second RAN cell, and wherein the UE capability parameter indicates UE capability; and receiving, at the first controller from the second controller, an indication of whether the second controller has adjusted a second handover parameter value based on the transmitted information, wherein the second handover parameter value is for use in determining whether to cause handover from the second RAN cell to the first RAN cell.