Date Added: Jan 2013
Wireless communication and mobile communication technologies have witnessed a fast development in recent years. Among all the other technologies in communication industry, mobile communication, for its wide deployment and easy access nature, has shaped the people world in a profound manner. Today, more than one billion people worldwide are mobile subscribers and this number will still be increasing rapidly over the next few years. Now the systems of 3G and 4G are designed for the future needs. But as in the 4G system the higher carrier frequency shrinks the cell coverage of the base station; relay nodes are placed in order to maintain the coverage and quality of service. As was proved in it is more effective to use Multi-hop ARQ in such systems.