Section: A.7 Monitoring of interference situation
Content: In the LTE radio technology interference has to be coordinated on the basis uplink and downlink i.e. in a coordinated usage of the UL resources (Physical Resource Blocks, PRBs) and DL Transmitted Power, which lead to improve SIR and corresponding throughput. These are achieved by means of mechanisms employing channel quality indicators in support of scheduling/radio resource allocation functions. These RRM functions in the eNB require the setting of frequency / power restrictions and preferences for the resource usage in the different cells. Setting and updating these parameters is the task of a network optimisation (done by operator or automatically by SON). Use cases for the related interference measurements are e.g. optimisation of ICIC related RRM functionality, the detection of long distance interferer and the interference due to spurious emissions of neighbour cells. The later case is assumed only in high load scenarios or unsufficent ICIC functionality due to the the fact that ICIC functionality would minimise interference autonomously if sufficient bandwidth is available. The necessary measurements to identify and anylse the interference situation as input for optimisation tasks has to be defined.