lte eran6.0 carrier aggregation feature issue1.00
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Huawei TrainingTRANSCRIPT
LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
Confidential Information of Huawei. No Spreading Without Permission
LTE eRAN6.0 Carrier Aggregation Feature
Confidential Information of Huawei. No Spreading Without Permission
LTE eRAN6.0 Carrier Aggregation Feature
Confidential Information of Huawei. No Spreading Without Permission
LTE eRAN6.0 Carrier Aggregation Feature
Confidential Information of Huawei. No Spreading Without Permission
Classification of CA
Intra-band CA: Capable to aggregate 2 carriers within the same band class.
Inter-band CA: Capable to aggregate 2 carriers within different band class.
LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
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eRAN6.0 only support co-eNodeB CA with same or different coverage.
LTE eRAN6.0 Carrier Aggregation Feature
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CA brings the following benefits:
Maximized utilization of time-frequency resources
CA UE can use idle resource blocks (RBs) on two CCs to minimize the waste
of resources
Efficient utilization of non-contiguous spectrum chunks
With CA, an operator's non-contiguous spectrum chunks are aggregated
for efficient utilization, especially in spectrum refarming scenarios.
Better user experience
With CA enabled in 2x2 multiple-input multiple-output (MIMO) scenarios, a
single CA UE can reach a downlink peak data rate of 300 Mbit/s.
LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
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Carrier management involves addition, activation, deactivation, and removal of an SCell for
a UE.
A2:服务小区质量低于一定门限
A4:异频邻区质量高于一定门限
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The frequency information of SCell should be configured in the PCell in advanced. If UE is
capable for CA, and eNodeB will activate the measurement for SCell frequency by default.
It utilizes the specific A4 and A2 event for PCell management. The event descriptions are
the same as handover, but the threshold could be separated.
When a UE sends an A4 measurement report that contains a cell whose RSRP exceeds the
related threshold for event A4 and that is in the same CA group as the PCell, the eNodeB
delivers an RRC Connection Reconfiguration message to the UE to configure the cell as an
SCell for the UE.
LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
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After the SCell is configured for a UE, the eNodeB can take the following carrier
management actions if CarrierMgtSwitch is set to ON:
When the traffic volume of the UE is low, the eNodeB can deactivate the SCell to
reduce UE power consumed by data transmission/reception and blind decoding, as
well as overhead for uplink channel state information (CSI) reporting.
When the traffic volume of the UE is high, the eNodeB can quickly activate the
SCell to increase the UE throughput.
Otherwise, eNodeB will directly activate the Scell after configuration.
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After the SCell is configured for a UE, the eNodeB can take the following carrier
management actions if CarrierMgtSwitch is set to ON:
When the traffic volume of the UE is low, the eNodeB can deactivate the SCell to
reduce UE power consumed by data transmission/reception and blind decoding, as
well as overhead for uplink channel state information (CSI) reporting.
When the traffic volume of the UE is high, the eNodeB can quickly activate the
SCell to increase the UE throughput.
LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
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PCell is changed through an RRC Connection Reconfiguration procedure, which is
equivalent to a handoverprocedure in the PCell change scenario. The SCell is added or
removed also through an RRCConnection Reconfiguration procedure, which is not a
handover procedure in the Scell configuration scenario.
LTE eRAN6.0 Carrier Aggregation Feature
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CA UE sends A3 measurement reports in the PCell. The eNodeB delivers an RRC
Connection Reconfiguration message to remove the SCell and then performs an intra-
frequency handover for the UE.
If CA is enabled for the new PCell (that is, the target cell of the handover), the serving
eNodeB delivers an A4 measurement configuration to the UE after the RRC connection is
established. Later, if the UE sends A4 measurement reports that contain a cell (for example,
cell 1) in the same CA group as the new PCell, the eNodeB configures cell 1 as an Scell for
the UE.
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During the inter-frequency handover, the target PCell might be the SCell in the same CA
group of the source eNodeB. As a result, it is likely that the UE is handed over from its
PCell to its SCell.
LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
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Be aware of that, two cells that are to be configured as a CA group are configured as a
neighboring cell of
each other.
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Parameters description
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Parameters Description
CarrAggrA2
ThdRsrp
Indicates the Reference Signal Received Power (RSRP) threshold for reporting event
A2 in a secondary cell. When the RSRP of a UE is lower than this threshold, event A2
is reported.
CarrAggrA4
ThdRsrp
Indicates the Reference Signal Received Power (RSRP) threshold for a UE to report
event A4 in a secondary cell. When the RSRP of the UE is greater than the threshold,
event A4 is reported
CarrierMgtS
witch
Indicates the carrier management switch. If this switch is turned on, a secondary
component carrier (SCC) is activated and deactivated based on the traffic volume,
which reduces the UE power consumption when a carrier aggregation (CA) UE
performs no service or a few services. If this switch is turned off, the SCC is always
active after being configured, a CA UE can use the SCC immediately when the traffic
volume is large.
ActiveBufferLenThd
Indicates the threshold for a CA UE to activate an SCell. A CA UE can active an SCell
only when its buffered data on the eNodeB exceeds this threshold.
DeactiveBuf
ferLenThd
Indicates the threshold for a CA UE to deactivate an SCell. A CA UE can deactivate an
SCell only when its buffered data on the eNodeB is smaller than this threshold.
ActiveBuffer
DelayThd
Indicates the threshold for a CA UE to activate an SCell. A CA UE can activate an
SCell only when its buffer delay on the eNodeB exceeds this threshold.
DeactiveThr
oughputThd
Indicates the threshold for a CA UE to deactivate an SCell. A CA UE can deactivate an
SCell only when its throughput is smaller than the value of this parameter.
LTE eRAN6.0 Carrier Aggregation Feature
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LTE eRAN6.0 Carrier Aggregation Feature
Confidential Information of Huawei. No Spreading Without Permission
LTE eRAN6.0 Carrier Aggregation Feature
Confidential Information of Huawei. No Spreading Without Permission