A method of receiving downlink data associated with an end-to-end connection between a communications device and an endpoint by an access stratum infrastructure equipment in a wireless communications network, the wireless communications network comprising a core network, the access stratum infrastructure equipment and another access stratum infrastructure equipment, the access stratum infrastructure equipment connected to the core network and to the other access stratum infrastructure equipment, the other access stratum infrastructure equipment providing a wireless access interface, wherein the wireless access interface is for the transmission of data to and the reception of data from the communications device and the downlink data is for transmission to the communications device. the method comprising: determining a round trip time between the communications device and the endpoint, the round trip time comprising a total time from the transmission of data by the communications device using the end-to-end connection to the reception by the communications device of an acknowledgement indication transmitted by the endpoint in response to receiving the data, transmitting an indication of the determined round trip time to the other access stratum infrastructure equipment for transmission to the communications device, receiving the downlink data from the core network, determining that the downlink data comprises a positive acknowledgement indication generated in accordance with an end-to-end protocol providing reliable, in-order delivery of data, the positive acknowledgement indication indicating that uplink data associated with the end-to-end connection transmitted by the communications device has been successfully received at the endpoint, and in response to determining that the downlink data comprises the positive acknowledgement indication, determining that one or more discard criteria are met, the one or more discard criteria comprising a criterion that the positive acknowledgement indication generated in accordance with the end-to-end protocol is not a duplicate of a previous positive acknowledgement indication generated in accordance with the end-to-end protocol, and discarding the downlink data. determining a round trip time between the communications device and the endpoint, the round trip time comprising a total time from the transmission of data by the communications device using the end-to-end connection to the reception by the communications device of an acknowledgement indication transmitted by the endpoint in response to receiving the data, transmitting an indication of the determined round trip time to the other access stratum infrastructure equipment for transmission to the communications device, receiving the downlink data from the core network, determining that the downlink data comprises a positive acknowledgement indication generated in accordance with an end-to-end protocol providing reliable, in-order delivery of data, the positive acknowledgement indication indicating that uplink data associated with the end-to-end connection transmitted by the communications device has been successfully received at the endpoint, and in response to determining that the downlink data comprises the positive acknowledgement indication, determining that one or more discard criteria are met, the one or more discard criteria comprising a criterion that the positive acknowledgement indication generated in accordance with the end-to-end protocol is not a duplicate of a previous positive acknowledgement indication generated in accordance with the end-to-end protocol, and discarding the downlink data.