A method for communicating backhaul load information for assigning radio resources to small cells in 3GPP networks, said method comprising: - providing by a plurality of eNodeB wireless mobile connectivity to a plurality of User Equipment; and - aggregating, by means of a node running in a non-3GPP network, backhaul load information related to the access line of each one of said plurality of eNodeB, characterized in that each one of said plurality of eNodeB includes an eNodeB identification and a MAC address of said eNodeB, the method further comprising following steps: a) receiving, by a Proxy Serving Gateway (Proxy S-GW) located in said non-3GPP node, the MAC address of each one of the interfaces of said non-3GPP node on which said backhaul load information aggregation has been done and the traffic load for every received MAC address: b) communicating said (Proxy S-GW with a Service Gateway (S-GW) pertaining to a 3GPP network by means of a standard S1 interface; and c) sending to said S-GW, through said standard S1 interface, in order to assign radio resources to said plurality of eNodeB, the received MAC address of each one of the interfaces of the non-3GPP node and the traffic load thereof, wherein said S-GW receives a first information element from said Proxy S-GW comprising said MAG addresses of the interfaces and their traffic load a second information element from each eNodeB comprising said eNodeB identification and said MAC address of said eNodeB, through said standard S1 interface and further performs a mapping between the eNodeB identification and the MAC address provided by each second information element and the MAC address and the traffic load provided by the first information element. - providing by a plurality of eNodeB wireless mobile connectivity to a plurality of User Equipment; and - aggregating, by means of a node running in a non-3GPP network, backhaul load information related to the access line of each one of said plurality of eNodeB, characterized in that each one of said plurality of eNodeB includes an eNodeB identification and a MAC address of said eNodeB, the method further comprising following steps: a) receiving, by a Proxy Serving Gateway (Proxy S-GW) located in said non-3GPP node, the MAC address of each one of the interfaces of said non-3GPP node on which said backhaul load information aggregation has been done and the traffic load for every received MAC address: b) communicating said (Proxy S-GW with a Service Gateway (S-GW) pertaining to a 3GPP network by means of a standard S1 interface; and c) sending to said S-GW, through said standard S1 interface, in order to assign radio resources to said plurality of eNodeB, the received MAC address of each one of the interfaces of the non-3GPP node and the traffic load thereof, a) receiving, by a Proxy Serving Gateway (Proxy S-GW) located in said non-3GPP node, the MAC address of each one of the interfaces of said non-3GPP node on which said backhaul load information aggregation has been done and the traffic load for every received MAC address: b) communicating said (Proxy S-GW with a Service Gateway (S-GW) pertaining to a 3GPP network by means of a standard S1 interface; and c) sending to said S-GW, through said standard S1 interface, in order to assign radio resources to said plurality of eNodeB, the received MAC address of each one of the interfaces of the non-3GPP node and the traffic load thereof,