fdd lte radio parameters description guide
TRANSCRIPT
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Internal Use Only
Contents
Basic Cell Parameters
Cell Selection and Reselection Parameters
Random Access Parameters
Paging Parameters
Measurement Parameters
Handoff Parameters
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Internal Use Only
Basic Cell Parameters
Physical Cell ID
Parameter Description
This parameter identifies a unique physical cell that can be included in only one cell
group. A system provides a total number of 504 physical cell IDs, which are classified
into 168 groups, each group containing three unique IDs.
When configuring this parameter, ensure that physical cell IDs should be space
multiplexing as planned.
Value Range and Step Length
Value Range: Int (0, 1, , 503)
Default Value: 0
Configuration Principles A physical cell ID should be uniquely assigned for the same frequency point in the same
geographical area or in different PLMNs (especially at the cell edge).
To separate the primary synchronous channels among adjacent cells, ZTE recommends
you set them to 0, 1, and 2because a macro eNodeB consists of three cells.
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Internal Use Only
Basic Cell Parameters
CP Selection for Physical Channel
Parameter Description
This parameter indicates the cyclic prefix (CP) of the OFDM symbol, which is used to
determine the total number of OFDM symbols within one slot. When this parameter is set to
normal cyclic prefix, it implies that seven OFDM symbols are available within one slot.
When this parameter is set to extended cyclic prefix, it implies that six OFDM symbols are
available within one slot.
he
Value Range and Step Length
Value Range: Enum (normal cyclic prefix, extended cyclic prefix)
Default Value: normal cyclic prefix
Configuration Principles
The CP is dependent on the multipath delay of a radio channel. In the presence of either
a large multipath delay or a large cell radius, extended cyclic prefixis recommended.
The extended cyclic prefixoption can suppress radio interference caused by multipath
delay, but suffering from lower system capacity; and therefore it is recommended that
you set it to the default value.
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Internal Use Only
Basic Cell Parameters
Downlink System Bandwidth
Parameter Description
This parameter indicates the system bandwidth in the downlink, which is used to
determine the frequency domain location of the downlink physical channel as well as
downlink frequency allocation.
Value Range and Step Length
Value Range: Enum (6, 15, 25, 50, 75, 100) Unit: RB
Default Value: 100
Configuration Principles
This parameter is dependent on the frequency bandwidth acquired by a mobileoperator. The downlink system bandwidth can either be identical to or different from
the uplink system bandwidth.
Modifying this parameter can have an impact on downlink resource allocation.
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Internal Use Only
Basic Cell Parameters
Uplink System Bandwidth
Parameter Description
This parameter indicates the system bandwidth in the uplink, which is used to determine
the frequency domain location of the uplink physical channel as well as uplink frequency
allocation.
Value Range and Step Length
Value Range: Enum (6, 15, 25, 50, 75, 100) Unit: RB
Default Value: 100
Configuration Principles
This parameter is dependent on the frequency bandwidth acquired by a mobileoperator. The downlink system bandwidth can either be identical to or different from
the uplink system bandwidth.
Modifying this parameter can have an impact on uplink resource allocation.
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Internal Use Only
Basic Cell Parameters
Cell Max Transmit Power
Parameter Description
This parameter specifies the maximum available transmit power.
Value Range and Step Length
Value Range: Float (0, , 50) Step: 0.1 Unit: dBm
Default Value: 43
Configuration Principles
The default value is intended to be used in the following environment:Object Value Object Value
Site Spacing 800 m Frequency Spectrum 2.6 G
BS Height 25 m Antenna Gain 18 dBiMaximum Transmit Power (UE) 24 dBm Body/Path Loss 3 dB
Maximum Uplink Throughput at Cell
Edge (UE Dynamic Scheduling)
128 kbps Shadow Fade Margin 10 dB
Maximum Downlink Throughput 800 kbps Penetration Loss 20 dB
Maximum Throughput (UE Semi-
Dynamic Scheduling)
32 kbps
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Internal Use Only
Basic Cell Parameters
Cell Transmit Power
Parameter Description
This parameter specifies the used transmit power.
Value Range and Step Length
Value Range: Float (0, , 50) Step: 0.1 Unit: dBm
Default Value: 43
Configuration Principles
For the environment information about the use of the default value, see page 7
(Cell Max Transmit Power).
This parameter is dependent on the cell radius and the planned downlinkthroughput at the cell edge. The greater the cell radius or the planned downlink
throughput at the cell edge, the greater the value of this parameter is required.
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Internal Use Only
Basic Cell Parameters
Cell-specific Reference Signals Power
Parameter Description
This parameter specifies the absolute power value of the cell reference signal for each
resource element.
Value Range and Step Length
Value Range: Int (-60, , 50) Unit: dBm Default Value: 6
Configuration Principles
For the environment information about the use of the default value, see page 7 (Cell Max
Transmit Power).
This parameter is dependent on cell coverage. The greater the cell coverage, the greaterthe value of this parameter is required. This parameter should be used for ensuring cell
coverage while achieving the maximum power.
A reference signal power value should be properly tuned in accordance with the required
power of the downlink control channel at the cell edge based on the link estimation
calculated by using such radio parameters as cell type, cell radius, and antenna height.
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Basic Cell Parameters
Switch for User Inactivity
Parameter Description
This parameter specifies whether to enable the USER INACTIVITY feature.
Parameter Location in the OMC
To find this parameter, choose Views> Configuration Management > LTENE> Global
Parameters of eNodeB in the OMC.
Value Range and Step Length
Value Range: Enum (close, open)
Default Value: close
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Internal Use Only
Basic Cell Parameters
User Inactivity Timer
Parameter Description
This parameter specifies the time interval at which the UE is in inactive state.
Parameter Location in the OMC
To find this parameter, choose Views> Configuration Management > LTENE> Global
Parameters of eNodeB in the OMC.
Value Range and Step Length
Value Range: one second to 30 days
Default Value: 10 minutes
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Internal Use Only
Basic Cell Parameters
Pmax
Parameter Description
This parameter specifies the maximum transmit power allowed for the UE configured on
the higher layer.
Value Range and Step Length
Value Range: Int (-30, , 33) Unit: dBm
Default Value: 23
Configuration Principles
For the environment information about the use of the default value, see page 7
(Cell Max Transmit Power).
This parameter is dependent on the cell radius and the planned uplink throughput
at the cell edge. The greater the cell radius or the planned uplink throughput at the
cell edge, the greater the value of this parameter is required.
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Contents
Basic Cell Parameters
Cell Selection and Reselection Parameters
Random Access Parameters
Paging Parameters
Measurement Parameters
Handoff Parameters
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Q_RxLevMinOffset
Parameter Description
This parameter indicates the offset of the minimum required received power level of
the cell which satisfies the condition of being selected or reselected by UE. It will
affect the minimum required received power level in the cell. Range of the
parameter is actual value which equals to double of value in 36.331.
Value Range and Step Length
int (2, .., .16) step 2 unit dB
Default value: 2
Configuration Principles
Offset to the signalled Qrxlevmin taken into account in the Srxlev evaluation as a
result of a periodic search for a higher priority PLMN while camped normally in a
VPLMN.For normal cases, the default value is recommended. For some higher
priority PLMN scenario, the value could be greater than the default value.
(Depending on the coverage, loading, requirements of the high priority PLMN.
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Internal Use Only
Qhyst
Parameter Description
This parameter indicates the hysteresis value for cells. In cell-ranking criterion R of
cell reselection, the R value of serving cell equals to the measured value plus the
hysteresis value. For detail description please refer to TS 36.304.
Value Range and Step Length int (0, 1, 2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24)
Default value: 3
Configuration Principles
This specifies the hysteresis value for ranking criteria of serving cell. If a cell is
ranked as the best cell the UE shall perform cell reselection to that cell.The default
value is recommende to be used in normal cases.The greater is the value of this
parameter, the harder to fullfill the reselection process.
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Internal Use Only
Cell Selection and Reselection Parameters
ThresholdServing_Low
Parameter Description
This parameter specifies the low threshold for the serving carrier when the low priority carrier or
system is selected and the following conditions can be fulfilled:
The cell without any high priority carrier or system can meet the cell reselection criteria for
escalating to a higher priority.
When the Treselectionthreshold is not exceeded, SServingCellis smaller than
byThreshSvrLow while SnonServingCell,x(low priority carrier or system) is greater than
byThreshSvrLow (including inter-frequency and inter-system).
The UE has resided in the serving cell for more than one second.
Value Range and Step Length
Value Range: Int (0, , 62) Step: 2 Unit: dB
Default Value: 0
Configuration Principles
This threshold is used when the UE evaluates and reselects a low-priority E-UTRAN or RAT
frequency point as the serving frequency point.
TheSServingCellthreshold is applicable to the serving cell. When this SServingCellthreshold
is reached, it is likely that the cell reselection will be triggered.
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Internal Use Only
Cell Selection and Reselection Parameters
S_Intrasearch
Parameter Description
This parameter specifies the intra-frequency measurement trigger threshold for cell selection. The UE
is used to determine whether to implement the intra-frequency measurement.
Value Range and Step Length
Value Range: Int (0, ..., 62) Step: 2 Unit: dB
Default Value: 14
Configuration Principles
When the quality of the serving cell is greater than the S_intrasearchvalue, the UE does not
implement the intra-frequency measurement.
When the quality of the serving cell is equal to or smaller than the S_intrasearchvalue, the UE
implements the intra-frequency measurement.
Setting this parameter to a too small value will cause the UE to fail in implementing the intra-
frequency measurement in a timely manner, and thus failing to reselect an adjacent intra-
frequency cell.
Setting this parameter to a too large value will cause the UE to waste battery resources.
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Internal Use Only
Cell Selection and Reselection Parameters
IntraQ_OffsetCell
Parameter Description
This parameter specifies the intra-frequency cell reselection offset that is used to tune
adjacent cells using the R criteria, and therefore it is comparable to the Qhystparameter.
Value Range and Step Length
Value Range: Enum (-24,-22,-20, -18, -16, -14, -12, -10, -8, -6, -5, -4, -3, -2, -1, 0, 1,2, 3, 4, 5, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24) Unit: dB
Default Value: 0
Configuration Principles
Do not set this parameter to a too large value. Otherwise, the serving cell is very poor,
but cannot be reselected.
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Cell Selection and Reselection Parameters
Intra_Pmax
Parameter Description
This parameter specifies the maximum available uplink transmit power, depending on
the UE type. It is used for intra-frequency cell reselection. If this parameter is void, the
UE will follow its own capabilities for further handling.
Value Range and Step Length Value Range: Int (-30..33) Unit: dBm
Default Value: 23
Configuration Principles
For more information, see page 12 (Pmax). The Intra_Pmaxparameter is
dependent on the configuration data of adjacent cells.
Modifying this parameter can have an impact on SIB3.
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Internal Use Only
Cell Selection and Reselection Parameters
The Timer for Cell Reselection in Inter-frequency E-UTRAN
Parameter Description
This parameter represents an inter-frequency cell reselection timer. Within the
TreselectionInterEUTRAN, a new E-UTRAN inter-frequency cell, which performs better
than the serving cell using the R criteria, can be reselected as a new serving cell.
Value Range and Step Length Value Range: Int (0, , 7) Unit: s
Default Value: 1
Configuration Principles
This parameter is comparable to the tRslIntraEutra parameter, which represents
an intra-frequency cell reselection timer. You can set it to a value that is equal to or
slightly greater than the tRslIntraEutra parameter.
Modifying this parameter can have an impact on SIB5.
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Cell Selection and Reselection Parameters
Intra-frequency Cell Reselection Priority
Parameter Description
This parameter specifies the priority for intra-frequency cell reselection. The smaller the value
of this parameter, the lower the cell reselection priority is.
Value Range and Step Length
Value Range: Int (0, , 7) Step: 1 Default Value: 0
Configuration Principles
The UE can implement the cell reselection process for only E-UTRAN frequency points
and inter-system frequency points that have acquired the priority based on the
corresponding system information. However, the UE will never consider any blacklisted
cell as a candidate for cell reselection.
If an adjacent cell has higher priority than the serving cell during the cell reselection
measurement, the UE will unconditionally enable the intra-system or inter-system
measurement. A higher priority cell takes precedence during the cell reselection process.
Modifying this parameter can have an impact on SIB3.
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Cell Selection and Reselection Parameters
Intra-frequency Neighbour CSG Cell Physical Identity Range
Parameter Description
This parameter specifies the total number of CSG cells in an intra-frequency neighboring
CSG cell group.
Value Range and Step Length
Value Range: Enum (4, 8, 12, 16, 24, 32, 48, 64, 84, 96, 128, 168, 252, 504)
Default Value: 4
Configuration Principles
If this parameter is void, it implies that only one CSG neighboring cell is present.
The physical identify of this CSG cell is represented by the
intraFreqCSGPhyCellId_lowest parameter.
Modifying this parameter can have an impact on SIB4.
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Contents
Basic Cell Parameters
Cell Selection and Reselection Parameters
Random Access Parameters
Paging Parameters
Measurement Parameters
Handoff Parameters
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Random Access Parameters
Key random access parameters include:
Cell High-Speed Attribute
Ncs Used to Generate PRACH Preamble
Logical Root Sequence Start Number Used to Generate PRACH Preamble
Number of Non-dedicated Random Access Preambles
Size of Random Access Preambles Group A
Threshold of Selecting Preamble Group
Message Power Offset for Group B
the Initial RB Number for Random Access Preambles
PRACH Configuration Index PRACH
Initial Power for Preamble of PRACH
Power Ramping Step for PRACH
Max retransmit number for PRACH
TTI Window Size for PRACH Response
Max Number of Messages HARQ Transmissions Message 3
MAC Contention Resolution Timer
Dedicated Preamble Life Time
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Random Access Parameters
Cell Radius
Preamble
Format
RadiusThrdLR
a (km)
RadiusThrdH
Ra (km)
0 0 14
1 29 77
2 14 29
3 77 100
Cell High-Speed Attribute
Default Value: Not high speed cellValue Range: Enum {Not high speed cell, high speed cell}
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Random Access Parameters
MTDT
Preamble
format
MaxCellRadius
(km)
0 103.2768 97.0176 5.2 14.545367
1 685.3824 516.384 16.7 77.418191
2 203.424 197.1648 16.7 27.994603
3 685.3824 716.6784 16.7 100.25223
CPTGPT MTDT
67.6/),min( GPMTDCPcell TTTR
SequenceCP
CPT SEQT
Guard Pd
GPT
RTDT MTDT
One slot
s24576 T
s3168 T
s21024 T
sT15360 sT15360 sT15360 sT15360
s6240 T
s24576 T s15840 T
s6080 Ts24576 T s24576 T
s21024 T s24576 T s24576 T
sT15360 sT15360
s24576 T
s21993 T
s2976 T
One subframe (1ms)
Format
0
Format
1Format
2
Format
3
Cell Radius (Supported):
015 km
3077 km
1530 km
77100 km
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for Preamble Generation (Preamble Formats 0-3)CSN
Ncs
configurati
on
Low and
Medium
Speed Ncs
(
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Logical root
sequence number
Physical root sequence number u
(in increasing order of the corresponding logical sequence number)
023 129, 710, 140, 699, 120, 719, 210, 629, 168, 671, 84, 755, 105, 734, 93, 746, 70, 769, 60, 779
2, 837, 1, 838
2429 56, 783, 112, 727, 148, 691
204-263 152, 687, 144, 695, 134, 705, 138, 701, 199, 640, 162, 677, 176, 663, 119
720, 158, 681, 164, 675, 174, 665, 171, 668, 170, 669, 87, 752, 169, 670, 88, 751, 107, 732, 81, 758, 82, 757, 100, 739, 98, 741,
71, 768, 59, 780, 65, 774, 50, 789, 49, 790, 26, 813, 17, 822, 13, 826, 6, 833
328383 225, 614, 224, 615, 221, 618, 220, 619, 127, 712, 147, 692, 124, 715, 193, 646, 205, 634, 206, 633, 116, 723, 160, 679, 186,
653, 167, 672, 79, 760, 85, 754, 77, 762, 92, 747, 58, 781, 62, 777, 69, 770, 54, 785, 36, 803, 32, 807, 25, 814, 18, 821, 11, 828,
4, 835
384455 3, 836, 19, 820, 22, 817, 41, 798, 38, 801, 44, 795, 52, 787, 45, 794, 63, 776, 67, 772, 72, 767, 76, 763, 94, 745, 102, 737, 90,
749, 109, 730, 165, 674, 111, 728, 209, 630, 204, 635, 117, 722, 188, 651, 159, 680, 198, 641, 113, 726, 183, 656, 180, 659,
177, 662, 196, 643, 155, 684, 214, 625, 126, 713, 131, 708, 219, 620, 222, 617, 226, 613
820-837 336, 503, 305, 534, 373, 466, 280, 559, 279, 560, 419, 420, 240, 599, 258, 581, 229, 610
Root Zadoff-Chu Sequence Order for Preamble Format 03
Random Access Parameters
Logical Root Sequence Start Number Used to Generate PRACH
Value Range: [0, ..., 837] Default Value: N/A
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Random Access Parameters
q Preamble Group B
64 Preambles
n Preamble Dedicated m Preamble Non-dedicated
p Preamble Group A
Number of Non-dedicated
Random Access Preambles
Default Value: 60
Value Range: Enum {
4, 8, 12, 16, 20, 24, 28, 32, 36,
40, 44, 48, 52, 56, 60, 64}
Size of Random Access
Preambles Group ADefault Value: 56
Value Range: Enum {
4, 8, 12, 16, 20, 24, 28, 32, 36,
40, 44, 48, 52, 56, 60}
Threshold of Selecting
Preamble GroupDefault Value: 144 bit
Value Range: Enum {
56, 144, 208, 256} bit
Message Power Offset for
Group BDefault Value: 0 dB
Value Range: Enum {
-infinity, 0, 5, 8, 10, 12, 15,
18} dB
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Random Access Parameters
47
PRB
n
48PRBn
49PRBn
Specifical
subframe
Uplink
subframe
7PRBn
0
PRB
n
1PRBn
2PRBn
8PRBn
...
SR
PUSCH
DMRS
CCR#0 data: CQI
CCR#2 data: ACK/NACK
CCR#1 data: CQI
CCR#3 data: ACK/NACK
CCR#0 pilot: CQI
CCR#2 pilot: ACK/NACK
CCR#1 pilot: CQI
CCR#3 pilot: ACK/NACKRACH
Initial RB Number for
Random Access Preambles
Value Range: [0, , 94]
Default Value: Void
PRACH Configuration Index
Value Range: [0, , 63]Default Value: 3
nPRB=2
60 ULRB NnRA
PRBoffset
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Random Access Parameters
The number of randomaccessing based oncontention resolution
Probability of RAcolliding
Physical Cell ID
Frame Structure Type 1 Random Access Configuration for Preamble Format 0
PRACH Configuration Index Preamble Format System frame number Sub-frame number
0 0 Even 1
1 0 Even 4
2 0 Even 7
3 0 Any 1
4 0 Any 4
5 0 Any 7
6 0 Any 1, 6
7 0 Any 2 ,7
8 0 Any 3, 8
9 0 Any 1, 4, 7
10 0 Any 2, 5, 8
11 0 Any 3, 6, 9
12 0 Any 0, 2, 4, 6, 8
13 0 Any 1, 3, 5, 7, 9
14 0 Any 0, 1, 2, 3, 4, 5, 6, 7, 8, 9
15 0 Even 9
Number of
slots per
second
Prach Configuration Index
Preamble Format 0 Preamble Format 1 Preamble Format 2 Preamble Format 3
50 0, 1, 2, 15 16, 17, 18, 31 32, 33, 34, 47 48, 49, 50, 63
100 3, 4, 5 19, 20, 21 35, 36, 37 51, 52, 53
200 6, 7, 8 22, 23, 24 38, 39, 40 54, 55, 56
300 9, 10, 11 25, 26, 27 41, 42, 43 57, 58, 59
500 12, 13 28, 29 44, 45 N/A
1000 14 N/A N/A N/A
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Ramping Power (Configurable)
T1 T2 T3 T4 T5 T6
P0
P0 +deta
P
P0 +2detaP
P0 +3detaP
P0 +5detaP
Initial Power for Preamble of PRACH
Default Value: -110 dBm
Value Range: Enum {
-120,-118,-116,-114-112-110-108-
106-104-102-100-98-96-94-92-90} dBm
Power Ramping Step for PRACH
Default Value: 2 dB
Value Range: Enum {0, 2, 4, 6} dB
Max retransmit number for PRACH
Default Value: 8
Value Range: Enum {3, 4, 5, 6, 7, 8, 10, 20,
50, 100, 200}
PRACH = min{PcMAX, PREAMBLE_RECEIVED_TARGET_POWER + PL}
PcMAX = Plmax + Pinitial + (N-1) * Step
Random Access Parameters
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Random Access Parameters
Msg4: Contention Resolution
Msg3: Scheduled Transmission
Msg2: Random Access Response
Msg1: Random Access Preamble
UE eNodeBTTI Window Size for PRACH
Response
Default Value: 10ms
Value Range: Enum {
2, 3, 4, 5, 6, 7, 8, 10} ms
Max Number of Messages
HARQ Transmissions
Default Value: 3
MAC Contention Resolution
Timer
Default Value: 48sf
Value Range: Enum {
8, 16, 24, 32, 40, 48, 56, 64} sf
Value Range: [1, , 8]
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Random Access Parameters
Msg3: Contention Requirement
Data or Padding
Msg2: RA Response
Sent on PDSCH
Msg1: Random Access Preamble
Dedicated Preamble
Msg0: PDCCH Order
Dedicated Preamble ID, Mask Index
UEeNodeB
0
1
2
3
Dedicated Preamble Life Time
Default Value: 100 ms
Value Range: [0, , 100] ms
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Contents
Basic Cell Parameters
Cell Selection and Reselection Parameters
Random Access Parameters
Paging Parameters
Measurement Parameters
Handoff Parameters
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Paging Parameters
DRX Cycle for Paging
Parameter Description
This parameter specifies the DRX cycle for paging purposes.
Value Range and Step Length
Value Range: Enum (32, 64, 128, 256) Unit: Sub-frame
Default Value: 128
Configuration Principles
When the UE is in idle state but the DRX is being used, the UE needs to monitor a
P-RNTI in a paging occasion every DRX cycle.
Modifying this parameter can have an impact on other UEs being in idle state.
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Paging Parameters
nB used to derive the Paging Frame and Paging Occasion
Parameter Description
This parameter specifies the nB that is used to derive the paging frame and paging
occasion, as defined in TS36.304.
Value Range and Step Length
Value Range: Enum (4T, 2T, T, 1/2T, 1/4T, 1/8T, 1/16T, 1/32T) Default Value: T
Configuration Principles
This parameter is an integer multiplied by T.
T represents a paging cycle. For example, 2T indicates two paging cycles and 4T
indicates four paging cycles.
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Paging Parameters
The Parameter to Determine BCCH Modification Period
Parameter Description
This parameter is used to determine the BCCH modification period (BCCH modification
period = N * DRX cycle length for paging). The purpose of this constraint is to ensure
that all the UEs being in idle state can monitor the system broadcast change message.
Value Range and Step Length Value Range: Enum (2, 4, 8, 16)
Default Value: 4
Configuration Principles
The greater this parameter, the longer the system message is updated. This can
have an adverse impact on real-time message update.
The smaller this parameter, the shorter the system message is updated. This can
cause the UE to monitor the systemInfoValueTagmore frequently.
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Contents
Basic Cell Parameters
Cell Selection and Reselection Parameters
Random Access Parameters
Paging Parameters
Measurement Parameters
Handoff Parameters
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Measurement Parameters
Intra-Frequency Trigger Quantity
Parameter Description
This parameter specifies the measured value that is used for triggering an event.
Value Range and Step Length
Value Range: Enum (0, 1) 0=RSRP, 1=RSRQ
Default Value: 0
Configuration Principles
RSRP is short for reference signal received power.
RSRQ is short for reference signal received quality.
When the UE detects that this parameter meets the threshold, it will trigger an intra-frequency cell measurement event.
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I t l U O l
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Measurement Parameters
Intra-Frequency Threshold for RSRP
Parameter Description
This parameter specifies the absolute RSRP threshold for the serving cell to decide
whether to trigger an event (A1, A2, A3, A4, and A5).
Value Range and Step Length
Value Range: A1/A2/A4/A5 : Int (-140, , -44) Unit: dBm Value Range: A3: Float (-15, , 15) Step 0.5 Unit: dB
Default Value: [-75 -100 3 -90 -110]
Configuration Principles
This parameter is valid only when the RptCriteria parameter is set to 0(Event triggered
reporting). It is applicable to A1, A2, A3, A4, and A5 only. The A1 threshold is greater
than the A2 threshold.
Internal Use Only
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Internal Use Only
Measurement Parameters
Intra-Frequency A5 Threshold2 for RSRP
Parameter Description
This parameter specifies the second RSRP threshold for an adjacent cell to decide
whether to trigger the A5 event .
Value Range and Step Length
Value Range: Int (-140, , -44) Unit: dBm Default Value: -90
Configuration Principles
This parameter is mapped to the values that are defined in the 3GPP TS36.331: -
140 (0), -139 (1), , -44 (96). It should be noted that no value is mapped to 97.
Based on the A5 definition, this parameter must be greater than the Intra-
Frequency Threshold for RSRP parameter.
Internal Use Only
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Internal Use Only
Measurement Parameters
Intra-Frequency Hysteresis
Parameter Description
This parameter specifies the hysteresis that is used to decide whether to trigger an event.
Value Range and Step Length
Value Range: Float (0, , 15) Step 0.5 Unit: dB
Default Value:
RSRP event-triggered reporting: [0 0 0 0 0]
RSRP periodically triggered reporting: -
RSRQ event-triggered reporting: [0 0 0 0 0]
RSRQ periodically triggered reporting: -9
Internal Use Only
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Internal Use Only
Measurement Parameters
Intra-Frequency Time to Trigger
Parameter Description
This parameter specifies the time difference between event occurrence and event reporting.
Value Range and Step Length
Value Range: Enum (0, 40, 64, 80, 100, 128, 160, 256, 320, 480, 512, 640, 1024, 1280,
2560, 5120) Unit: ms
Default Value: [256 256 256 256 256]
Configuration Principles
The greater this parameter is configured, the more stringent the event trigger
requirements becomes. You need to configure this parameter based on the desirable
requirements. Setting this parameter to a too large value will have an adverse impact on
call quality.
The UE will trigger an event reporting only when the actual time reaches the threshold of
this parameter. This parameter is introduced to prevent the UE from any fraudulent
reporting caused by jitter. When configuring this parameter, you need to take the DRX
cycle into consideration.
Internal Use Only
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Internal Use Only
Measurement Parameters
Intra-Frequency Reporting Interval for Event
Parameter Description
This parameter specifies the time interval at which measurement results are periodically
reported after an event is triggered.
Value Range and Step Length
Value Range: Enum (120, 240, 480, 640, 1024, 2048, 5120, 10240, 60000, 360000,720000, 1800000, 3600000) Unit: ms
Default Value: [1024 1024 1024 1024 1024]
Configuration Principles
When an event is triggered, the UE reports measurement results at time intervals. If
the actual value reaches the threshold of this parameter, the UE will stop reportingany measurement result.
This parameter is valid only when the RptCriteriaparameter is set to 0(event
triggered reporting).
This parameter must be greater than the TrigTimeparameter.
Internal Use Only
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Internal Use Only
Measurement Parameters
Intra-Frequency Amount of Reporting for event
Parameter Description
This parameter specifies the maximum number of reporting measurement results after
an event is triggered.
Value Range and Step Length
Value Range: Enum (1, 2, 4, 8, 16, 32, 64, Infinity) Default Value: [Infinity Infinity Infinity Infinity Infinity]
Configuration Principles
When an event is triggered, the UE reports measurement results at time intervals. If
the actual number reaches the threshold of this parameter, the UE will stop
reporting any measurement result.
Do not set this parameter to a too large value because it is used for intra-frequency
handoff.
This parameter is valid only when the RptCriteriaparameter is set to 0(event
triggered reporting).
Internal Use Only
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Internal Use Only
Contents
Basic Cell Parameters
Cell Selection and Reselection Parameters
Random Access Parameters
Paging Parameters
Measurement Parameters
Handoff Parameters
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y
Handoff Parameters
Threshold
A threshold is used to evaluate signal quality (A5: absolute threshold, A3: relative threshold).
Hysteresis and Timer
Hysteresis and timer are used to determine whether to start or stop an event.
Hysteresis is used to retard the start or stop of an event based on a decisive inequation,
which can greatly improve reliability for decision making. Hysteresis is normally used in
conjunction with a threshold.
A timer is used to evaluate time-based constancy of a certain state (including the start or
stop of an event) for the purpose of improving accuracy and reliability for event reporting.
For this reason, a timer is irrelevant to a threshold.
Customized Handoff Compensation
It can be used to compensate either a serving or adjacent cell.
When being added to the measured value of a serving cell, a positive compensation
value is used to prohibit a handoff.
When being added to the measured value of an adjacent cell, a positive compensation
value is used to trigger a handoff.
Internal Use Only
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y
Handoff Parameters
Time to Trigger
Parameter Description
This parameter specifies the time difference between event occurrence and event reporting.
Value Range and Step Length
Value Range: Enum (0, 40, 64, 80, 100, 128, 160, 256, 320, 480, 512, 640, 1024, 1280,
2560, 5120) Unit: ms
Configuration Principles
This parameters is used to determine the time required for reporting an event, at which
the measured value meets the event reporting criteria.
The UE will trigger an event reporting only when the actual time reaches the threshold of
this parameter. This parameter is introduced to prevent the UE from any fraudulent
reporting caused by jitter. When configuring this parameter, you need to take the DRX
cycle into consideration.
You can set this parameter to a greater value for a low-speed cell. This can avoid any
Pingpong reporting of measurement results due to signal jitter.
Internal Use Only
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y
Handoff Parameters
Hysteresis
Parameter Description
This parameter specifies the hysteresis for event reporting decision in order to avoid jitter.
Value Range and Step Length
Value Range: Enum (0, 0.5, , 15) Step: 0.5 Unit: dB
Configuration Principles
Setting this parameter to a too large value will increase difficulty in triggering an
event; however, setting this parameter to a too small value will result in the
Pingpong effect.
This parameter is comparable to the A3 Offset parameter. Meanwhile, it can be
used to avoid frequent measurement reporting.
Internal Use Only
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Handoff Parameters
Report On Leave
Parameter Description
This parameter indicates an A3 event is leaving. It can be used to determine whether the
UE needs to report an event when the A3-2 criteria is satisfied.
Value Range and Step Length
Value Range: Enum (false, true) Default Value: false
Configuration Principles
When this parameter is set to true, the UE will report an event if a cell meets the
A3-2 criteria.
You do not need to set this parameter is set to trueif handoff is triggered by only
one measurement event reporting.
This parameter is valid for the ICIC feature, in which case you need to set this
parameter to trueso that the base station can monitor the UEs profile change.
Internal Use Only
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