7. A user device according to any of clauses 2 to 6, wherein the user device has an identifier associated therewith and the infrastructure equipment is configured to determine the location and duration of at least one of the response windows based upon the identifier of the user device and a predetermined rule, and the user device is configured to determine the location and duration of the at least one of the response windows based on the identifier associated therewith and the predetermined rule.

8. A user device according to any preceding clause, wherein the user device is a 3GPP LTE compliant device.

9. A user device according to any preceding clause, wherein the access request message includes a random access preamble and the response message is a random access response.

10. A method for transmitting and receiving data from and to a user device to and from an infrastructure equipment via a wireless access interface, the method comprising

receiving an indication from the infrastructure equipment of a location and duration of a temporal response window for receiving response messages, the response messages being received in response to access request messages and the location and duration of the temporal response window having been determined by the infrastructure equipment,

transmitting an access request message for requesting access to the wireless access interface to the infrastructure equipment from the user device, and

receiving a response message in response to the access request message from the infrastructure equipment at the user device, wherein the method comprises

receiving the response message at the user device in the temporal response window.