Nhiều giao thức truy cập đối với truyền thông di động P5
Nhiều giao thức truy cập đối với truyền thông di động P5
MODELS FOR THE PHYSICAL LAYER AND FOR USER TRAFFIC GENERATION In general, sophisticated communication systems are designed according to the concept of layering, often adhering to the OSI layering approach. The designer of a certain layer can then consider other layers as black boxes, which provide certain services defined in terms of functional relations between their respective inputs and outputs. She does not have to worry about the details of implementation of the next lower layer, but must on