Upload
heidi-moore
View
238
Download
1
Embed Size (px)
Citation preview
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
1/32
HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Huawei Confidential
Security Level: internal
Huawei eRAN3.0Admission and Congestion
Control FeatureIntroduction
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
2/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2
Admission and Congestion Control Features Roadmap
eRAN 2.x
(2011Q2)
eRAN 1.0
(2009Q2)
Basic admission control
based on power, RButilization and QoS
satisfaction ratio
S1 transmission resource
check
Independent HOthreshold
Redirection due to
admission failure
Overload Control
Admission threshold per
QCI
Min-GBR configuration for
non-GBR service per QCI
Pre-emption
Differentiation AdmissionControl
Pre-emption based on
user number
eRAN 3.0
(2012Q2)
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
3/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3
Content
Admission Control
Overload Control
Parameter Introduction
Algorithm Relationship
Application Scenario
Performance Statistic & Maintenance
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
4/32
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
5/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 5
Admission Control Strategy
Huawei two stage admission control strategy
Stage 1: Resource Allocation & Check (HW,TNL, Overload indicator, downlinkpower)
Stage 2: QoS Satisfaction Ratio-basedadmission check (both uplink anddownlink GBR)
Different types of service requests handling
Lower threshold provided for HO request, comparing with new service request; Admission thresholds (not applicable to HO request) configured per user priority
(Gold / Silver / Bronze levels mapping from ARP).
Resource Allocation
& Check
QoSSatisfaction
Ratio Check
Stage 2: UL/DLadmission check
Stage 1: Resource
availability
Emergency
call
Admission
Result
New service request
HO request
(higher priority)
New service request
HO request
(higher priority)
SRB request
Resource Allocation
& Check
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
6/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 6
Admission Flow Chart (1/2)
See next
slide
If system is overloaded, no
service (except SRB and
emergency call) can be admitted.
UE capability check based on GBR ,
considering Maximum number of bits
of an UL/DL-SCH transport block
transmitted within a TTI
The following resources will be
checked:
1. Transport (S1) resources;
2. HW limit: CPU processing,
maximum users per cell;
3. System overload indicator (via
load control)
4.PUCCH Resource5. Downlink Power.
New or HO
Service request
UE capability meets
the requirements?Reject
Emergency call (e.g.
911)?
Yes
Resource limited?
No
DL Admission
No
Accept? UL Admission
Accept?
Yes
Reject /
Redirection
No
No
Yes
No
Admitted
Yes
Yes
Preemption
Successful?
No
Yes
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
7/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 7
New /HO service request
RB utilization is below
threshold and not power-
limit?
GBR service QoS Satisfaction ratio
evaluation
Num of Non-GBR bearers Admit based on the QoS
satisfaction ratio threshold or
num of Non-GBR bearers
Reject/redirect
Admit
Yes
Yes
No
Yes
checking RB utilization
of GBR services
Yes
premption
No
No
No
Admission Flow Chart (2/2)
Reserve resource for non-
GBR services:
State the resource consumed
by GBR services, if it is higher
than the limit threshold, GBR
services should execute
preemption among GBR
services rather than continueto utilize the remained
resource reserved for Non-
GBR services Kick off low priority service so
as to let high priority service
be admitted
DRB admission failure will
trigger preemption process.
Signal, IMS, urgent call cant
be preempted.
Need to release enough low
priority in-system services so
as to satisfy the GBR or min-
GBR of new service with high
priority.
To reduce theunnecessary non-GBRservices of one user areadmitted into the systemwhen the users AMBRlimitation is reached Released users will be
allocated with different
frequency through RRC signal.
Unsuccessfully preemptedusers except HO users, and
preempted users, can be
redirected.
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
8/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8
Checking RB utilization of GBR services Objective
Guarantee that GBR services will not exhaust all of the cell resource and Non-GBR services will not be
subjected to severe starvation.
Benefits Can reduce the risk that Non-GBR services are subjected to severe starvation
Functionalities
Principle
Stat the resource consumed by GBR services, if it is higher than the limit threshold, GBR services should
execute preemption among GBR services rather than continue to utilize the remained resource reserved for
Non-GBR services.
trigger
The function can be switched on\off.
If switched on, each GBR data radio bearer setup request arrives, this checking action will be executed.
Key parameter
GbrUsedRbCheckSwitch: the switch of function
GbrSerHighProportion ::threshhold represents that GBR services RB utilization ratio is high
GbrSerLowProportion: threshhold represents that GBR services RB utilization ratio is low
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
9/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 9
Preemption Objective
Guarantee that Services with high priority can still access a congested network.
Benefits
Produce the diversity for service-access.
Functionalities
Principle
DRB admission failure will trigger preemption process.
Signal, IMS, urgent call cant be preempted.
Need to release enough low priority in-system services so as to satisfy the GBR of new service with high
priority.
trigger
Preemption can be switched on/off.
If switched on, when fail to admitted, this function will be executed
Key parameter
PreemptionSwitch: the switch of function
PreemptionArpThd: ARP threshold which means that all services with lower ARP than the threshold may be
preempted.
UnPreemptedServSet: represents which QCIs services cant be preempted
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
10/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 10
Redirection
Objective
Guarantee that released users can access network from other frequency when services are requested
once again.
Benefits
Can reduce the risk that current cell becomes overload again.
Functionalities
Principle
Released users will be allocated with different frequency through RRC signal.
Unsuccessfully preempted users except HO users, and preempted users, can be redirected.
Trigger
Redirection can be switched on\off.
Key parameters
RedirecAlgoSwitch: the switch of function
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
11/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 11
QoS Satisfaction Ratio based Admission Decision
Provide independent threshold for HO request, per QCI.
Provide different thresholds based on user priority (Gold / Silver / Bronze
levels mapping from ARP) for new service request, per QCI.
HOThr
Satisfaction Ratio
GoldThr
SilverThr
BronzeThr
QcixHoThd
OffsetGold
Offset Silver
OffsetBronze
Time
HOThr
GoldThr SilverThr BronzeThr
100%
DL Q S S ti f ti R ti Ch k
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
12/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 12
DL QoS Satisfaction Ratio Check
QoS satisfaction ratio is evaluated based on the QoS Class Identifier (QCI) for
the call to be admitted.
Each QCI has its corresponding QoS satisfaction criteria.
Non-GBR service neednt to be checked.
Emergency call neednt to be checked.
Mapping between QCI and evaluation standard for downlink services is
provided in default.
QCI Service Type Evaluation Standard
1 Conversational Meet the Guaranteed bit rate
2 Conversational Video (Live
Streaming)
Meet the Guaranteed bit rate
3 Real Time Gaming Meet the Guaranteed bit rate
4 Non-Conversational Video
(Buffered Streaming)
Meet the Guaranteed bit rate
UL Q S S ti f ti R ti Ch k
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
13/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 13
UL QoS Satisfaction Ratio Check
QoS satisfaction ratio check in the uplink:
QoS satisfaction ratio is evaluated based on the Logical Channel Group (LCG) for the call to
be admitted.
Each LCG has its corresponding QoS satisfaction criteria.
Mapping between LCG and evaluation standard for uplink services is provided in default.
The nine QCIs are mapped to the four logical channel groups:
Logical Channel Group Evaluation Standard
1 Meet the Guaranteed bit rate
2 Meet the Guaranteed bit rate
Logical Channel Group QCI Service Type
0 QCI=5 and SRB
bearer
Control-plane transmission and IMS
signaling1 QCI=1 VoIP service
2 QCI=24 GBR service
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
14/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 14
Content
Admission Control
Overload Control
Parameter Introduction
Algorithm Relationship
Application Scenario
Performance Statistic & Maintenance
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
15/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 15
Overload Control Overview
Objective
Guarantee services QoS in the system on cell level
Benefits
Prevent system from being unstable due to overload and improve system
stability
Guarantee the QoS in the system by effectively alleviate the system overload
Functionalities Triggered when an overload situation occurs and based on RB Utilization and
QoS Satisfaction Ratio
Overload Control actions
GBR Downgrading
Service Release / Redirection
Overload Control Procedure
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
16/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 16
QoS satisfaction cannot be met
and RB usage high / DL Tx power
limited
Service Release /
Redirection
Priority-based GBR
Downgrading
Overload Control Procedure
Two actions to alleviate the
system load effectively
Proportion reducing GBR of GBR
services according to priority
Only if redirect/release is enabled
Overload Triggered
If no connection can be redirected/released
These two actions are
optional to Operators.
Priority based GBR Downgrading
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
17/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 17
Priority-based GBR Downgrading
Objective
Guarantee that GBR services with different priority are downgraded with different percent when
network becomes congested.
Benefits
GBR service with different priority can be downgraded with different percent.
Functionalities
Principle
Set different downgrading percent for golden/silver/bronze services respectively. Thengolden/silver/bronze services can be downgraded according to preset percent.
trigger
If service release switch off, the function will be executed
If service release switch on but without enough services to be released to reduce load, the
function will be executed.
Key parameter GoldGbrCongProportion: the downgrading proportion for gold GBR bearers.
SilverGbrCongProportion : the downgrading proportion for silver GBR bearers.
CopperGbrCongProportion: the downgrading proportion for copper GBR bearers.
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
18/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 18
Content
Admission Control
Overload Control
Parameter Introduction
Algorithm Relationship
Application Scenario
Performance Statistic & Maintenance
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
19/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 19
Key Parameters (1)
Id Name Description Range Recommended
Value
MML
RacAlgoS
witch
RAC
algorithm
switch
Indicates the switches used to enable or
disable the admission and load control
algorithms.
DlSwitch, UlSwitch,
GbrUsageSwitch,
DlLdcSwitch, UlLdcSwitch,
RelDrbSwitch,
PreemptionSwitch
DlSwitch:Off
UlSwitch:Off
GbrUsageSwitch:Off
DlLdcSwitch:Off
UlLdcSwitch:Off
RelDrbSwitch:Off
PreemptionSwitch:Off
MOD
CELLALGO
SWITCH
GoldServic
eArpThd
Gold
service arp
threshold
Indicates the Allocation and Retention Priority
(ARP) threshold for the Golden-level services.
A service is defined as a Golden-level service
if its ARP value is smaller than this threshold.
GUI value range: 1~15 5 MOD
CELLRACT
HD
SilverServiceArpThd
Silverservice arp
threshold
Indicates the Allocation and Retention Priority(ARP) threshold for the Silver-level services. A
service is defined as a Silver-level service if its
ARP value is smaller than or equal to the value
of this parameter and is larger than the value
of GoldServiceArpThd.
GUI value range: 1~15 10 MOD
CELLRACT
HD
Qci1HoThd QCI1
handover
admission
threshold
Indicates the admission threshold for the
handed-over service with QCI of 1. This
threshold applies to both UL and DL.
If the satisfaction rate of services with QCI of 1
is above or equal to this threshold, thehanded-over service with QCI of 1 can be
admitted.
If the satisfaction rate of services with QCI of 1
is below this threshold, the handed-over
service with QCI of 1 cannot be admitted.
GUI value range: 10~99 90 MOD
CELLRACT
HD
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
20/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 20
Key Parameters (2)
Id Name Description Range Recommended
Value
MML
Qci2HoThd QCI2 handover
admission
threshold
Indicates the admission threshold for the handed-over service
with QCI of 2. This threshold applies to both UL and DL.
If the satisfaction rate of services with QCI of 2 is above or
equal to this threshold, the handed-over service with QCI of 2
can be admitted.
If the satisfaction rate of services with QCI of 2 is below this
threshold, the handed-over service with QCI of 2 cannot be
admitted.
GUI value
range:
10~99
90 MOD
CELLALGOS
WITCH
Qci3HoThd QCI3 handover
admission
threshold
Indicates the admission threshold for the handed-over service
with QCI of 3. This threshold applies to both UL and DL.If the satisfaction rate of services with QCI of 3 is above or
equal to this threshold, the handed-over service with QCI of 3
can be admitted.
If the satisfaction rate of services with QCI of 3 is below this
threshold, the handed-over service with QCI of 3 cannot be
admitted.
GUI value
range:
10~99
90 MOD
CELLRACTH
D
Qci4HoThd QCI4 handover
admission
threshold
Indicates the admission threshold for the handed-over service
with QCI of 4. This threshold applies to both UL and DL.
If the satisfaction rate of services with QCI of 4 is above or
equal to this threshold, the handed-over service with QCI of 4can be admitted.
If the satisfaction rate of services with QCI of 4 is below this
threshold, the handed-over service with QCI of 4 cannot be
admitted.
GUI value
range:
10~99
90 MOD
CELLRACTH
D
(3)
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
21/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 21
Key Parameters (3)
Id Name Description Range Recommen
ded Value
MML
NewGold
ServiceOf
fset
Gold new
service
admission
threshold
offset
Indicates the offset for admission of new Gold-level services. The
value of this parameter applies in both UL and DL. New Gold-level
services and handed-over services with QCI N can be admitted if both
the following conditions are met: (1) The satisfaction rate of services
with QCI N is higher than or equal to the sum of this offset and the
admission threshold for the handed-over services with QCI N; (2) The
satisfaction rate of services with any other QCI is higher than the
corresponding admission threshold for the handed-over services with
that QCI. If the satisfaction rate of services with any QCI is lower than
its corresponding admission threshold for handed-over services with
that QCI, the new services cannot be admitted.
GUI
value
range:
0~90
5 MOD
CELLALGOS
WITCH
NewSilver
ServiceOf
fset
Silver new
service
admission
threshold
offset
Indicates the admission threshold for the handed-over service with
QCI of 3. This threshold applies to both UL and DL.
If the satisfaction rate of services with QCI of 3 is above or equal to
this threshold, the handed-over service with QCI of 3 can be admitted.
If the satisfaction rate of services with QCI of 3 is below this threshold,
the handed-over service with QCI of 3 cannot be admitted.
GUI
value
range:
10~99
5 MOD
CELLRACTH
D
K P t (4)
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
22/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 22
Key Parameters (4)
Id Name Description Range Recommen
ded Value
MML
NewCopp
erService
Offset
Bronze new
service
admission
threshold
offset
Indicates the offset for admission of new Bronze-level services. The
value of this parameter applies in both UL and DL. New Bronze-level
services and handed-over services with QCI N can be admitted if both
the following conditions are met: (1) The satisfaction rate of services
with QCI N is higher than or equal to the sum of this offset and the
admission threshold for the handed-over services with QCI N; (2) The
satisfaction rate of services with any other QCI is higher than the
corresponding admission threshold for the handed-over services with
that QCI. If the satisfaction rate of services with any QCI is lower than
its corresponding admission threshold for handed-over services with
that QCI, the new services cannot be admitted.
GUI
value
range:
10~99
5 MOD
CELLRACTH
D
Qci1Cong
Thd
QCI1 congest
threshold
Indicates the congestion threshold for services with QCI of 1. This
threshold applies to both UL and DL.If the satisfaction rate of services with QCI of 1 in the cell becomes
lower than this threshold, the services with QCI of 1 enter the
congested state.
If the satisfaction rate of services with QCI of 1 in the cell becomes
higher than the sum of this threshold and the congestion relief offset,
the services with QCI of 1 leave the congested state.
GUI
valuerange:
10~99
65 MOD
CELLRACTH
D
Qci2Cong
Thd
QCI2 congest
threshold
Indicates the congestion threshold for services with QCI of 2. This
threshold applies to both UL and DL.
If the satisfaction rate of services with QCI of 2 in the cell becomes
lower than this threshold, the services with QCI of 2 enter thecongested state.
If the satisfaction rate of services with QCI of 2 in the cell becomes
higher than the sum of this threshold and the congestion relief offset,
the services with QCI of 2 leave the congested state.
GUI
value
range:
10~99
65 MOD
CELLRACTH
D
K P t (5)
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
23/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 23
Key Parameters (5)
Id Name Description Range Recommen
ded Value
MML
Qci3Cong
Thd
QCI3 congest
threshold
Indicates the congestion threshold for services with QCI of 3. This
threshold applies to both UL and DL.
If the satisfaction rate of services with QCI of 3 the cell becomes
lower than this threshold, the services with QCI of 3 enter the
congested state.
If the satisfaction rate of services with QCI of 1 in the cell becomes
higher than the sum of this threshold and the congestion relief offset,
the services with QCI of 1 leave the congested state.
GUI
value
range:
10~99
65 MOD
CELLRACTH
D
Qci4Cong
Thd
QCI4 congest
threshold
Indicates the congestion threshold for services with QCI of 4. This
threshold applies to both UL and DL.
If the satisfaction rate of services with QCI of 4 in the cell becomes
lower than this threshold, the services with QCI of 4 enter the
congested state.If the satisfaction rate of services with QCI of 4 in the cell becomes
higher than the sum of this threshold and the congestion relief offset,
the services with QCI of 4 leave the congested state.
GUI
value
range:
10~99
65 MOD
CELLRACTH
D
GoldGbrC
ongPropo
rtion
Gold-level GBR
service
congest
scheduler
proportion
Indicates the rate reduction proportion for Gold-level GBR services.
When congestion occurs, the rate that the scheduling algorithm
provides for Gold-level GBR services (except VoIP services) is the
product of GBR and this proportion.
GUI
value
range:
1~100
90 MOD
CELLRACTH
D
SilverGbrCongProp
ortion
Silver-levelGBR service
congest
scheduler
proportion
Indicates the rate reduction proportion for Silver-level GBR services.When congestion occurs, the rate that the scheduling algorithm
provides for Silver-level GBR services (except VoIP services) is the
product of the GBR and this proportion.
GUIvalue
range:
1~100
90 MOD
CELLRACTH
D
K P t (6)
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
24/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 24
Key Parameters (6)
Id Name Description Range Recommen
ded Value
MML
CopperGb
rCongPro
portion
Bronze-level
GBR service
congestscheduler
proportion
Indicates the rate reduction proportion for Bronze-level GBR services.
When congestion occurs, the rate that the scheduling algorithm
provides for Bronze-level GBR services (except VoIP services) is theproduct of GBR and this proportion.
GUI
value
range:1~100
90 MOD
CELLRACTH
D
GbrRbUs
edHighTh
d
GBR used
resource high
proportion
threshold
Indicates the threshold for high PRB usage by GBR services. The
value of this parameter is expressed in percentage and applies to
both UL and DL. If the MAC layer detects that the PRB usage by GBR
services exceeds the threshold, the usage is high. In this situation,
new GBR services are not admitted if GbrUsageSwitch under the
RacAlgoSwitch parameter is turned on.
GUI
value
range:
1~100
95 MOD
CELLRACTH
D
GbrRbUs
edLowTh
d
GBR used
resource low
proportion
threshold
Indicates the threshold for low PRB usage by GBR services. The
value of this parameter is expressed in percentage and applies to
both UL and DL. If the MAC layer detects that the PRB usage by GBR
services falls below the threshold, the usage is considered to be low.
GUI
value
range:
1~100
90 MOD
CELLRACTH
D
LdcMeaAr
pThd
ARP threshold Indicates the Allocation and Retention Priority (ARP) threshold for
low Energy Efficiency Ratio (EER) services. If the ARP value of a
service is less than the value of this parameter, the service will not be
released for congestion control.
In this version, this parameter still supports setting synchronizationbetween the M2000 and the eNodeB, but is no longer used internally.
Avoid using this parameter as it will be removed from later versions
GUI
value
range:
1~100
10 MOD
CELLRACTH
D
Key Parameters (7)
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
25/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 25
Key Parameters (7)
Id Name Description Range Recommen
ded Value
MML
CongRelO
ffset
Offset for
service
congestrelieving
Indicates the congestion release offset. The service of a specific QCI
exits the congestion state if the satisfaction rate of the service
exceeds the sum of this congestion release offset and the congestionthreshold for the QCI. The service retains the congestion state if the
satisfaction rate is below the sum of this congestion release offset
and the congestion threshold for the QCI.
GUI
value
range:1~100
20 MOD
CELLRACTHD
Preemptio
nArpThd
Preemption
ARP
threshold
Indicates the Allocation and Retention Priority (ARP) threshold for
preemption. The services that have ARP values larger than or equal
to the value of this parameter are preemptible.
In this version, this parameter still supports setting synchronization
between the M2000 and the eNodeB, but is no longer used internally.
Avoid using this parameter as it will be removed from later versions.
GUI
value
range:
1~15
5 MOD
CELLRACTHD
UlRbHigh
Thd
Uplink RB
used ratio
high
threshold
Indicates the threshold for deciding on whether the UL RB usage is
high. This threshold applies to UL admission decision. If the UL RB
usage reported by the MAC layer is above this threshold, the UL RB
usage is assumed to be high.
GUI
value
range:
1~100
95 MOD
CELLRACTHD
DlRbHigh
Thd
Downlink RB
used ratio
high
threshold
IIndicates the threshold for deciding on whether the DL resource
block (RB) usage is high. This threshold applies to DL admission
decision. If the usage of the DL RB reported by the MAC layer is
above this threshold, the DL RB usage is assumed to be high.
GUI
value
range:
1~100
95 MOD
CELLRACTHD
MaxNonG
brBearerN
um
Non-GBR
max bearer
number
Indicates the maximum number of non-GBR services (excluding IP
Multimedia Subsystem [IMS] services) that can be provided by a cell.
The value of this parameter is applied to both UL and DL.
GUI
value
range:
0~9000
OD
CELLRACTHD
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
26/32
Al ith R l ti hi
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
27/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 27
Algorithm Relationship
AC depends on load monitor and congestion control, and it also relates with other physical
resource assignment such as PUCCH resource assignment and downlink power assignment
and transport resource management and hardware resource assignment.
Congestion control is related with load monitor.
Page 27
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
28/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 28
Content
Admission Control Overload Control
Parameter Introduction
Algorithm Relationship Application Scenario
Performance Statistic & Maintenance
A li ti S i
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
29/32
HUAWEI TECHNOLOGIES Co., Ltd. HUAWEI Confidential Page 29
Application Scenario
AC and congestion control application includes non-sharing and sharing.
In non-ran sharing scenario:
When cell load is high and PRB usage is high, it will execute AC for new RRC setup request.
Otherwise, it is to close the switcher in default. For HO service, it will always execute AC.
In ran sharing scenario:
It will always open AC and congestion control algorithm switch. Every operator will set individual AC
Threshold and execute the AC algorithm and congestion control.
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
30/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 30
Content
Admission Control Overload Control
Parameter Introduction
Algorithm Relationship Application Scenario
Performance Statistic & Maintenance
Performance Statistic & Maintenance
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
31/32
HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential
Performance Statistic & Maintenance
Counter name Counter Description
RRC Connection Setup
Measurement
An RRC connection is a Uu interface connection for carrying user signaling messages. The setup success
rate of the RRC connection in a cell directly represents the capability of the cell to provide RRC connection
setups for users. The RRC.Setup.Cell measurement unit measures the number of RRC connection setup
requests, number of RRC connection setup attempts, and number of successful RRC connection setups in a
cell. The setup success rate of the RRC connection can be calculated on the basis of the reported counters.
Number of RRC connection
reestablishment requests
The counters measure the number of RRC connection reestablishment requests for different causes in a cell.
The RRC Connection Reestablishment Request message is an RRC signaling message sent by the UE. The
message is used to recover the RRC signaling connection.
E-RAB Setup Measurement An E-RAB is the access layer bearer for carrying service data of users. The E-RAB setup success rate in a
cell directly represents the capability of the cell to provide E-RAB connection setups for users. The E-
RAB.Est.Cell measurement unit measures the number of E-RAB setup attempts and the number of
successful E-RAB setups for each service with a different QoS Class Identifier (QCI) in a cell. The number of
E-RABs is used as the unit. The setup of one E-RAB is measured as one time.
E-RAB Release
Measurement (Cell)
An E-RAB is the access layer bearer for carrying service data of users. The E-RAB release is a process of
releasing the access layer bearer resources of users. It represents the capability of a cell to release access
layer bearer resources for users. The E-RAB.Rel.Cell measurement unit measures the number of normal E-
RAB releases and the number of abnormal E-RAB releases for each service with a different QCI in a cell.
The number of E-RABs is used as the unit. The release of one E-RAB is measured as one time.
8/10/2019 SPD Huawei ERAN3.0 Admission and Congestion Control Feature Introduction 20120529 a 1.0
32/32
Thank You
www.huawei.com