[信息与通信]Locating爱立信切换算法.ppt

Parameter Summary ParameterSummary Parameter Summary Ericsson 3 Parameter Summary Parameter Summary Technical Training Radio Network Features Idle Mode Behaviour Locating Intra-cell Handover Hierarchical Cell Structure Assignment to Another Cell Dual Band Operation Locating Technical Trainning Locating Is the Software Algorithm That Works Out the Basis for Handover Decisions Locating Algorithm 6个可选功能 6个可选功能 Locating Input Data Filtering General FIR Recursive straight average Recursive exponential Recursive 1st order Butterworth Median 最常用 Selection of Signal Strength Filters 高铁设为3 Selection of Quality Filters Initiation of Filters When a filter is not filled it is modified. In this case all filters but the median filter work as straight average filters with their length equal to the number of measurements that are available. The median filter still works as a median filter. In addition, for neighbor cells the filters are ramped (SSRAMPSD). Timing Advance Filter One single timing advance filter is used for all cells in the BSC. It is a straight average filter with a length specified by TAAVELEN . 只进行简单的算术平均 Basic Ranking 减去惩罚 BUSSUFF K=0 Correction of DL Signal StrengthMeasurements Correction for difference between BSTXPWR and BSPWR: SS_DOWNm = rxlevm + BSTXPWRm – BSPWRm Minimum Level Condition for NeighborCells Downlink condiction SS_DOWNn MSRXMINn Uplink condiction SS_UPn BSRXMINn SS_UPn = MSTXPWRn - Ln Ln = BSTXPWR - SS_DOWNn 相邻小区 Penalty Evaluation Location penalty Handover failure, PSSHF (size) , PTIMHF (duration) Bad quality urgency handover, PSSBQ (size), PTIMBQ (duration) Excessive timing advance urgency handover, PSSTA (size), PTIMTA (duration) HCS penalty To prevent fast mobiles from connecting to small lower layer cells, PSSTEMP (size), PTIMTEMP (duration) 多层小区结构 Hysteresis(双向一至) and Offset (双向非一至)Parameters KOFFSET and KHYST modify the K- K border. LOFFSET and LHYST modify the L- L border. TROFFSET and TRHYST modify the K- L bord