Communication networks and methods are disclosed for providing offline charging in a 3GPP network for sessions over a wireless local area network access network. A network node and a system executing the method are also described. Information symbols comprised of bytes are provided eight bytes in parallel to an encoder which in parallel forms eight bytes of a nonsystematic code word. The information is inserted into closed caption bandwidth. While the patient data may also be deleted as a technique for protecting the data, not deleting the data may allow the data to be recovered at a later time by an authorized user, i.