Section 1.5 SIB4

• Introduction
• SIB4 Information element
• SIB4 message

Introduction

• SIB4仅包含同频临小区重选信息
• SIB4包括具有特定重选参数以及黑名单小区
• SIB4包含的所有内容均是可选项, 因为UE可以自动探测和完成同频临小区监测

SIB4 Information element

SystemInformationBlockType4 ::= SEQUENCE {
   intraFreqNeighCellList IntraFreqNeighCellList OPTIONAL, -- Need OR
   intraFreqBlackCellList IntraFreqBlackCellList OPTIONAL, -- Need OR
   csg-PhysCellIdRange PhysCellIdRange OPTIONAL, -- Cond CSG
   ...,
   lateNonCriticalExtension OCTET STRING OPTIONAL
}

SIB4 message

.SIB4

MS1
System Information Block 4

Time : 10:01:27.846
intraFreqNeighCellList
  IntraFreqNeighCellList :                           
    [0 ] :
      physCellId : 14 
      q-OffsetCell : dB0
    [1 ] :
      physCellId : 201
      q-OffsetCell : dB0

• IntraFreqNeighCellList 同频临小区重选列表, 最多16个
• physCellId 临小区ID
• q-OffsetCell 定义两小区间的偏移. Value -24 ~ +24dB