LTE Rough Guide

LTE Rough GuideWCDMAHSDPAHSUPAHSPA+LTELTE ADVANCE2004200520062008/2009201038414MBPS28150DL 75UL100DL FAST1285.7MBPS11481G SLOW1501. For spatial multiplexing, CQI is reported based on per codeword. The maximum number of codeword in LTE is two.There are seven transmission modes in LTE, each one is corresponding to certain multiple antenna techniques. For each transmission mode, certain combination of CQI report is defined in the specs, based on periodic/aperiodic, wideband/UE selected subband/higher layer configured subband, No PMI/single PMI/multiple PMI. Since RI changes slower than CQI/PMI, it is reported with a longer interval on periodic report. It is reported together with CQI/PMI on aperiodic report since the resource on PUSCH is less limited.

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&DHuawei Proprietary - Restricted DistributionPage&Pof&N

MLBMLB= Mobility Load Balance (Only for inter freq or IRAT) nor for Itra FreqTrigering Factor ( PRB Utiliation & Number of UE's)Air Interface Load = PRB Usage & Number of UE's in synchronized stateHardware Load = CPU & DSPTransport Network Layer Load = S1 Bandwidth usage

MROMROMobility Robust OptimiationSONSelf Organizing NetworkMRO collects handover performance statistics for different scenarios, identifies abnormal handover scenarios, and optimizes the handover-related parameter settings. MRO helps to reduce the number of abnormal radio link failures (RLFs) caused by premature and delayed handovers, handovers to wrong cells, or ping-pong handovers to achieve better resource utilization and improve user experiencethe triggering quantity and reporting quantity used in handover measurements for MRO are based on reference signal received power (RSRP).1)- Handover scenario identification2)- Handover scenario handling3)- Result monitoringOPTperiodMRO Optimization PeriodCollects HO related measurements (successful handover and abnormal senarios"early/delayed/ping pong HO) in this period and then make a decisionWhen OPTperiod approches its end MRO make parameter adjustments based on number of abnormal HO