lte

Difference between Centralized radio resource management and Distributed radio resource management in LTE

What is the difference between Centralized RRM and Distributed RRM?

I heard that LTE has Distributed RRM. Previous generation had Centralized RRM. Can some please explain the differences between them.

Solution

  • Finally, I found the answer for this question. In GSM, GPRS/EDGE, UMTS, HSPA there is a master controller, that controls all the base stations. There is Base Station Controller (BSC) in case of GSM, GPRS/EDGE, and the Radio Network Controller for 3G systesms (UMTS, HSPA). 

    2G/2.5G-->BSC,
3G-->RNC.

    This is termed as Centralized Radio Resource Management.

    But in LTE, most of the functions of RNC are integrated into eNodeBs(Base stations in LTE). So, there is no master controller, which controls the base stations (eNodeB) in LTE. This is called Distributed Radio Resource Management. Also called as flat architecture.

    Reference:https://www.youtube.com/watch?v=1_x9axf0jlk&list=PLE6yE0jB6BTOeXSdhXeOxVQPhnZ0R3ltM