By Y. Jay Guo
An engineer with a protracted historical past in radio communications, and now with a British corporation, Guo surveys the applied sciences for advancements in cellular radio entry networks from the point of view of procedure engineering, focusing regularly on high-level architectural concerns. He highlights the benefits of complex applied sciences, but additionally discusses significant theoretical and functional difficulties that they increase for process designers. between his themes are linear transmitters, superconducting filters and cryogenic radio frequency entrance head, radio over fiber, software program radio base stations, cellular terminal positioning, and excessive- velocity downlink packet entry.
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Additional info for Advances in Mobile Radio Access Networks
First, no IPDL is needed, so the downlink capacity is preserved. Second, since the signal processing is done in the network equipment, more complicated processing becomes affordable and therefore the positioning accuracy can be potentially improved. Third, there is no need to modify the UE nor the node B. Fourth, the impact on the standards is low. Fifth, it provides some protection against UE obsolescence and eases the network management, as it is far easier and less complex to upgrade the software in RNCs and LMUs than it is to upgrade millions of terminals.
Another advantage of superconducting filters and the cryogenic receiver front end is that they can be installed as add-on appliqué modules without changing the configuration of the existing system. The advantage of the superconducting filters can be further exploited to enable dynamic spectrum allocation or more efficient spectrum utilization in regions where the spectrum is not tightly regulated, such as the United States. The remote RF head and radio over fiber offer a lot of benefits to mobile network operators.
The radio equipment part includes analog and radio frequency functions such as filtering, amplification, carrier modulation, frequency conversion, and digital-toanalog and analog-to-digital conversion. The REC part is responsible for baseband signal processing, interfacing with the radio network controller, and management and control of the base station. CPRI defines the serial digital interface between the RE part and REC part, in which the user traffic data, the control and management messaging, and the synchronization signal are time-multiplexed.
Advances in Mobile Radio Access Networks by Y. Jay Guo