Section: A.10 Monitor of paging performance
Content: In EUTRAN, Paging is under the control of the MME. When the MME wants to page a UE it has to page it in all cells that belong to the TA(s) to which the UE is registered. The paging load per cell is an important measure for the operator as it allows the operator to properly dimension the resources for paging in the E-UTRAN Cell . At an E-UTRAN Cell it makes sense to measure the number of discarded paging messages if this is due to some problem in the eNodeB, such as paging occasion overflow. In that scenario the periodicity of paging occasions can be reconfigured in order to ensure that all paging messages are transmitted by the eNodeB in the first available paging occasion, thereby avoiding paging delays and extended call setup delay. Operators need to know when such an event occurs, in order to identify if the problem is at the E-UTRAN cell level or not. In addition to discarded paging records measurement, it is important to know total paging records received so that discarded paging records ratio can be derived. Total number of paging records received is important in the sense that, it may be fine if the discarded paging records are high if discarded paging records ratio is small. On the other hand, it may be problematic if discarded paging records are low, if discarded paging records ratio turn out to be high.