name: MRO
full_form: Mobility Robustness Optimization
context: The following measurement is defined specifically to monitor the performance of handover optimisation: - Number of handover failures for MRO. The measurement examines âhandover related eventsâ in which the serving cell of a RRC connected UE is changed. Handover related events are either normal successful handovers, or they are failures. Different failure modes are possible and the measurement provides counts for the occurrences of the failure modes related with MRO, âtoo earlyâ, âtoo lateâ and âto wrong cellâ. The detailed definitions of these modes are captured in [12]. The counters provide visibility of the mix of failure problems that the handover optimistion function is tackling. In âhandover to wrong cellâ case, an RLF occurs shortly after a successful handover from a source cell (cell A in Figure A.13-1) to a target cell (cell B in Figure A.13-1) or a HOF occurs during the handover procedure; the UE attempts to re-establish the radio link connection in a cell (Cell C in Figure A.13-1) other than the source cell and the target cell. (See 36.300 [12]). Figure A.13-1 Handover to wrong cell case For the âhandover to wrong cellâ case (ABC) above-mentioned, the handover parameters on Neighbour Relation AB, Neighbour Relation AC or both may be problematic and need to be corrected. So the performance measurements for both Neighbour Relation AB and Neighbour Relation AC are needed for problem detection. In addition to event-based (i.e. reactive) optimization of handover performance, a pro-active optimization is possible by monitoring the dynamics of handover triggering from UE measurement reports.
description: Mobility Robustness Optimization (MRO) is a procedure within the 3GPP specifications aimed at enhancing the robustness and efficiency of handovers in mobile networks. It involves monitoring and optimizing handover performance by analyzing various failure modes, such as 'too early', 'too late', and 'to wrong cell'. The MRO procedure utilizes measurements and counters to provide visibility into the types of handover failures occurring, thereby enabling network operators to proactively optimize handover parameters and improve overall network performance.
explanation: MRO is classified as a Procedure because it outlines a specific set of steps and analyses aimed at optimizing handover performance in mobile networks. The detailed definitions and measurements involved in MRO, such as the examination of 'handover related events' and the identification of failure modes, demonstrate its procedural nature within the context of 3GPP specifications.
section_title: A.13 Monitoring of Mobility Robustness Optimization (MRO)
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