COMMUNICATION METHOD AND DEVICE IN COMMUNICATION SYSTEM AND RECORDING MEDIUM HAVING RECORDED PROGRAM FOR CARRYING OUT COMMUNICATION METHOD

摘要

Communication method and device in a communication system and a recording medium having recorded thereon a program for carrying out the communication method are disclosed. The method of converting data includes the steps of: receiving a higher-layer header separated from one or more layer 3 PDUs (Protocol Data Units); compressing the higher-layer header; receiving location information on a location in a transmitted data storage unit in which layer 3 data of the one or more layer 3 PDUs from which the higher- layer header is separated is stored; performing an encrypting operation using the location information on the location at which the one or more layer 3 data is stored and the compressed one or more higher-layer headers corresponding to the location information; and generating and outputting a transmission block by adding a layer 2 header to a transmission unit packet generated by the encrypting operation. Here, the layer 2 is a data link layer. As a result, it is possible to optimally use a memory when a layer 2 processes data sent from a higher layer.