A method in a mobility management entity of a telecommunications network, the method comprising the steps of: negotiating use of header compression over at least a portion of a backhaul link, the backhaul link extending between a serving gateway node and a base station node of the telecommunications network, wherein the backhaul link comprises a General Packet Radio service Tunneling Protocol, GTP, tunnel between the serving gateway node and a relay base station node, wherein the GTP tunnel traverses a radio interface between the relay base station node and a donor base station node, and further comprising handling signaling between the serving gateway node and the relay base station node for negotiating by the Mobility management entity the use of the header compression inside the General Packet Radio service Tunneling Protocol tunnel, or wherein the backhaul link comprises a first tunnel extending between a donor base station node and the serving gateway node and a second tunnel extending between a relay base station node and the donor base station node, wherein the second tunnel traverses a radio interface between the relay base station node and the donor base station node, and further comprising handling signaling between the donor base station node and the relay base station node for negotiating the use of the header compression inside the second tunnel, or wherein the backhaul link comprises a first tunnel extending between a donor base station node and the serving gateway node and a second tunnel extending between a relay base station node and the donor base station node, wherein the second tunnel traverses a radio interface between the relay base station node and the donor base station node, and further comprising handling signaling between the serving gateway node and the donor base station node for negotiating by the Mobility management entity the use of the header compression inside the first tunnel. negotiating use of header compression over at least a portion of a backhaul link, the backhaul link extending between a serving gateway node and a base station node of the telecommunications network, wherein the backhaul link comprises a General Packet Radio service Tunneling Protocol, GTP, tunnel between the serving gateway node and a relay base station node, wherein the GTP tunnel traverses a radio interface between the relay base station node and a donor base station node, and further comprising handling signaling between the serving gateway node and the relay base station node for negotiating by the Mobility management entity the use of the header compression inside the General Packet Radio service Tunneling Protocol tunnel, or wherein the backhaul link comprises a first tunnel extending between a donor base station node and the serving gateway node and a second tunnel extending between a relay base station node and the donor base station node, wherein the second tunnel traverses a radio interface between the relay base station node and the donor base station node, and further comprising handling signaling between the donor base station node and the relay base station node for negotiating the use of the header compression inside the second tunnel, or wherein the backhaul link comprises a first tunnel extending between a donor base station node and the serving gateway node and a second tunnel extending between a relay base station node and the donor base station node, wherein the second tunnel traverses a radio interface between the relay base station node and the donor base station node, and further comprising handling signaling between the serving gateway node and the donor base station node for negotiating by the Mobility management entity the use of the header compression inside the first tunnel.