Nhiều giao thức truy cập đối với truyền thông di động P2
Nhiều giao thức truy cập đối với truyền thông di động P2
CELLULAR MOBILE COMMUNICATION SYSTEMS: FROM 1G TO 4G The basic principles of cellular communications were explained in the introductory chapter, and terms such as cluster size and reuse efficiency introduced. In the following, some more considerations on the advantages and limitations of the cellular concept will be made before reviewing first generation (1G) and second generation (2G) cellular communication systems. Moving on to 3G, we will first discuss the initial requirements according to which