载波聚合(CA)功能启用后，终端将使用两个（以上）的载波资源进行下行（或上行）数据传输；这种场景下载波是怎么调度的呢？kangguoying20201219
在载波聚合场景下的载波（主、辅载波）的调度有两种方式，其一是主、辅载波各自调度（下图左），另一种方式则是主载波负责全部载波资源的调度（下图右）；前者主、辅载波可灵活调度，而后者可以集中控制，节省控制资源的开销； 终端对载波聚合中资源调度方式是通过高层（RRC）消息获取的，它们分别如下：kangguoying20201219
1.（高层）主、辅载波各自调度消息
rrcConnectionReconfigurationkangguoying20201219
rrc-TransactionIdentifier: 0
criticalExtensions: c1 (0)kangguoying20201219
c1: rrcConnectionReconfiguration-r8 (0)
rrcConnectionReconfiguration-r8
radioResourceConfigDedicated
physicalConfigDedicated
nonCriticalExtensionkangguoying20201219
lateNonCriticalExtension: <MISSING>
nonCriticalExtension
nonCriticalExtensionkangguoying20201219
sCellToAddModList-r10: 1 item
Item 0kangguoying20201219
SCellToAddMod-r10
sCellIndex-r10: 1
radioResourceConfigDedicatedSCell-r10
physicalConfigDedicatedSCell-r10
nonUL-Configuration-r10kangguoying20201219
crossCarrierSchedulingConfig-r10
schedulingCellInfo-r10: own-r10 (0)
own-r10kangguoying20201219
.... ..0. cif-Presence-r10: False
2.（高层）主载波集中调度消息
rrcConnectionReconfiguration
rrc-TransactionIdentifier: 0
criticalExtensions: c1 (0)kangguoying20201219
c1: rrcConnectionReconfiguration-r8 (0)
rrcConnectionReconfiguration-r8
radioResourceConfigDedicated
physicalConfigDedicated
nonCriticalExtensionkangguoying20201219
lateNonCriticalExtension: <MISSING>
nonCriticalExtensionkangguoying20201219
nonCriticalExtension
sCellToAddModList-r10: 1 item
Item 0kangguoying20201219
SCellToAddMod-r10
sCellIndex-r10: 1kangguoying20201219
radioResourceConfigDedicatedSCell-r10
physicalConfigDedicatedSCell-r10
nonUL-Configuration-r10
crossCarrierSchedulingConfig-r10
schedulingCellInfo-r10: other-r10 (1)
other-r10kangguoying20201219
schedulingCellId-r10: 0
pdsch-Start-r10: 3
3.集中调度中的DCI指示
原文来自：www.sharetechnote.com
整理：kangguoying20201219
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