Disclosed are: an inter-layer optimization method in which data about the many dynamic changes in a wireless environment is shared and cross-layer optimization is implemented; and an abstraction layer component for the same. In a multimedia transmission layer operating method in which optimization of a first layer and a second layer is implemented by using service data provided from the first layer which contains a transmission layer and a network layer, and the second layer which is below a decoding layer, the operating method comprises: an upward abstraction step in which the service data provided to the second layer is processed and provided as a multimedia transmission layer; and a downward abstraction step in which instruction data provided from the multimedia transmission layer is processed and provided as the second layer. Consequently, there is the advantage that all layers share diverse data about the many dynamic changes in the wireless environment, and the data can be controlled to allow transmission in which service quality is ensured more effectively.