2gsm radio network tuning_handover (day 2)
TRANSCRIPT
![Page 1: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/1.jpg)
GSM Radio Network Tuning
Babak Kardel
Mehrdad Sedaghat
March 2008
![Page 2: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/2.jpg)
Introduction
• Network Mode
• Operation In Idle Mode
• Operation In Active Mode
• Radio Resource Administration
4/8/2008GSM Radio Network Tuning Course2
![Page 3: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/3.jpg)
4/8/2008GSM Radio Network Tuning Course3
![Page 4: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/4.jpg)
DUAL BAND SPECIFIC PARAMETERS
4/8/2008GSM Radio Network Tuning Course4
![Page 5: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/5.jpg)
4/8/2008GSM Radio Network Tuning Course5
DUAL BAND SPECIFIC PARAMETERS
Dual Band Cell (DBC), YesDual Band Cell (DBC), Yes
� When the option dual band is activated, all the cells under the dualband BSC
broadcast sysinfo 2ter in idle mode.
Early Classmark Sending (ESI), YesEarly Classmark Sending (ESI), Yes
� By default, the ESI is set to yes, even when the option Dualband is not
activated
� All the dualband phones send the CM3 IE to the network
� In the dedicated mode and if the mobile is Dualband, the Early classmark
sending procedure will be triggered that tells the BSC to add the system
information 5ter containing the frequencies of the other band to be measured
for this call
Multi Band Reporting (MBR), 1Multi Band Reporting (MBR), 1
� The network tells the mobile to report 1 frequency of the other band if it can
find any.Then the mobile will complete the report with frequencies of the
same band. If still less than 6 neighbors, the mobile tries to report
frequencies of the other band.
![Page 6: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/6.jpg)
4/8/2008GSM Radio Network Tuning Course6
DUAL BAND SPECIFIC PARAMETERS
6.82 multiband cell reporting (MBR)
Q3 name: multiBandCellReporting
Modification: Online
Range: 0..3
MML default: 1
Description: With this parameter you define the number of adjacent cells
from the other frequency band that the MS will report in the RX level report.
Related command(s): EQM, EQO
Note: OPTIONAL (Dual Band GSM/DCS)
![Page 7: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/7.jpg)
Multi Cell Reporting
• Multi_Cell_Rep : Number of neighbour cells the MS will report from each band
900
900 900
1800
1800
900 900
1800
900
1800 1800
1800
Measure 32
neighbours 6Report 6 best
measurements
Mobile can.....
3 3
1 5
1800 900
1800 900
Strongest
![Page 8: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/8.jpg)
4/8/2008GSM Radio Network Tuning Course8
•EarlySendingIndication : The parameter defines the requirements
for an MS in sending the Classmark 3 in call setup phase to the
network.
• Range : Yes (Early classmark sending accepted) / No (Early
classmark sending is forbidden)
• Recommended value : Yes in a Dual Band network
BTS Parameters - 2
DUAL BAND SPECIFIC PARAMETERS
![Page 9: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/9.jpg)
4/8/2008GSM Radio Network Tuning Course9
![Page 10: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/10.jpg)
4/8/2008GSM Radio Network Tuning Course10
Q3 name: multiBandCell
Range: Y/N
MML default: Y for Dual Band cells
N for cells that do not belong to the frequency bands of the Dual
Band
Description: With this parameter you define whether adjacent cells with a BCCH allocated
from a different frequency band than the serving cell BCCH are taken into account in
handovers and in idle mode cell selection or reselection.
Related command(s): EQF, EQO
Note: OPTIONAL (Dual Band GSM/DCS)
adjacency on other band (DBC)
![Page 11: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/11.jpg)
System Information MessagesSystem Information Messages
• Sys_Info Messages 2ter and 5ter tell the dual band MS about the adjacent cells allocated from the other
frequency band
• 2ter in idle mode• 5ter during a call
• Single band MS will ignore Sys_Info 2ter and 5ter
Idle mode
900Sys_Info_2
Sys_info_2bis
Sys_info_2ter
Sys_Info_2
Sys_info_2bis
1800 1800
1800
900
900 900
900
900 900
Single band MS Dual band MS
![Page 12: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/12.jpg)
4/8/2008GSM Radio Network Tuning Course12
Dual Band Protocol
![Page 13: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/13.jpg)
4/8/2008GSM Radio Network Tuning Course13
Dual Band Protocol
![Page 14: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/14.jpg)
4/8/2008GSM Radio Network Tuning Course14
![Page 15: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/15.jpg)
4/8/2008GSM Radio Network Tuning Course15
Multi-layer Dual Band Network
![Page 16: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/16.jpg)
4/8/2008GSM Radio Network Tuning Course16
Call setup Strategy
4/8/2008GSM Radio Network Tuning Course16
Call setup with 900 Band
Traffic handover to 1800 Band
2G Type RXP
Macro 900 -105 dBm
Macro 1800 -84 dBm
Micro outdoor -80 dBm
Micro Metro -105 dBm
Micro indoor -105 dBm
C1 ( 900) = Rxl-RXP = -70-(-105) = 35
C1 ( 1800) = Rxl-RXP = -70-(-84) = 14
C1 (Micro outdoor) = Rxl-RXP = -70-(-80) = 10
C1 (Pico) = Rxl-RXP = -70-(-105) = 35
![Page 17: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/17.jpg)
4/8/2008GSM Radio Network Tuning Course17
![Page 18: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/18.jpg)
Handover
4/8/2008GSM Radio Network Tuning Course18
![Page 19: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/19.jpg)
4/8/2008GSM Radio Network Tuning Course19
![Page 20: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/20.jpg)
4/8/2008GSM Radio Network Tuning Course20
![Page 21: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/21.jpg)
4/8/2008GSM Radio Network Tuning Course21
Synchronized Handover
• If source and target cells are controlled by the same BCF, these are
synchronized to each other.
• Thus the MS does not need timing advance information from the network.
![Page 22: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/22.jpg)
4/8/2008GSM Radio Network Tuning Course22
![Page 23: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/23.jpg)
4/8/2008GSM Radio Network Tuning Course23
Non Synchronized Handover
If original and target cells are controlled by different BCFs, the MS needs
timing advance information from the network. This is transferred by a socalled
physical info message.
To ensure a successful transmission, it can be repeated a certain number of
times. This is controlled by the parameter maxNumberOfRepetition
(NY1)(SEG)(5..35)(5).
Furthermore, there is a restricted time between the first handover access and the
last physical info message. This timer always is set to 320 ms, it is fixed in
GSM specifications. Usually any handover is a non synchronized
handover. The
![Page 24: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/24.jpg)
4/8/2008GSM Radio Network Tuning Course24
![Page 25: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/25.jpg)
4/8/2008GSM Radio Network Tuning Course25
Handover Failure
If the signalling timer mentioned above expires or the radio link within
the target cell cannot be established, the MS returns to the old cell
![Page 26: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/26.jpg)
HANDOVER PROCESS Causes
Timing Advance
Adjacent Cells
Downlink Quality
Uplink Quality AV_RXQUAL_UL_HO
AV_RXQUAL_DL_HO
Downlink Level
Uplink Level AV_RXLEV_UL_HO
AV_RXLEV_DL_HO
AV_RANGE_HO
AV_RXLEV_NCELL(n)
QUALITY&
INTERFERENCE
QUALITY&
INTERFERENCE
LEVELLEVEL
DISTANCEDISTANCE
PERIODICCHECKS
UMBRELLAUMBRELLA
POWER BUDGETPOWER BUDGET
IMPERATIVE HO
CHANNEL ADMINISTRATIONCHANNEL ADMINISTRATION
DIRECTED RETRYDIRECTED RETRY
THRESHOLD COMPARISON
RAPID FIELD DROPRAPID FIELD DROP
Others:
Intelligent Underlay Overlay
Traffic Reason
……….
MS SPEEDMS SPEED
MS Speed AV_MS_SPEED
![Page 27: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/27.jpg)
4/8/2008GSM Radio Network Tuning Course27
![Page 28: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/28.jpg)
upper layer (macro)
same layer (serving
layer)
lower layer (micro)
HANDOVER PROCESSmultilayer networks
N (not in use)
Parameter
adjacentCellLayer(ACL)
![Page 29: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/29.jpg)
4/8/2008GSM Radio Network Tuning Course29
Handover Parameters
![Page 30: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/30.jpg)
4/8/2008GSM Radio Network Tuning Course30
Target Cell Selection
If handover shall be carried out, a suitable target cell must be found. The
standard selection process uses as criteria the traffic loads, priorities
and RX levels of the adjacent cells.
Standard Selection• First of all, the traffic load of all adjacent cells is verified. If it exceeds the
threshold defined by the parameter (the unit is %) btsLoadThreshold
(BLT)(SEG)(0..100)(70), the cell is overloaded.
• Next the cell priorities are considered. These are defined by the
parameter hoPriorityLevel (PRI)(ADJC)(0..7)(3)
• If a cell is overloaded, the priority is reduced by a certain value which is
defined by the parameter hoLoadFactor (OF)(ADJC)(0..7)(1).
• Now the cells are ranked according their corrected priority. If two cells
have the same priority, they are ranked according their RX level.
![Page 31: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/31.jpg)
4/8/2008GSM Radio Network Tuning Course31
![Page 32: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/32.jpg)
4/8/2008GSM Radio Network Tuning Course32
Source Target PRI OF ACL SL AUCL
Macro 900 Macro 900 3 1 Same
- 95
dBm - 47dBm
Macro 900 Macro 1800 4 1 Lower
- 84
dBm - 80dBm
Macro 900 Micro outdoor 4 1 Lower
- 80
dBm - 75dBm
Macro 900
Micro
Metro&indoor 4 1 Same
- 95
dBm - 47dBm
![Page 33: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/33.jpg)
4/8/2008GSM Radio Network Tuning Course33
Handover Parameters
![Page 34: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/34.jpg)
4/8/2008GSM Radio Network Tuning Course34
Handover Parameters
![Page 35: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/35.jpg)
4/8/2008GSM Radio Network Tuning Course35
Source Target PRI OF ACL SL AUCL
Macro 900 Macro 900 3 1 Same - 95 dBm
-
47dBm
Macro 900 Macro 1800 4 1 Lower - 84 dBm
-
80dBm
Macro 900 Micro outdoor 4 1 Lower - 80 dBm
-
75dBm
Macro 900
Micro
Metro&indoor 4 1 Same - 95 dBm
-
47dBm
![Page 36: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/36.jpg)
4/8/2008GSM Radio Network Tuning Course36
Source Target PRI OF ACL SL AUCL
Macro 1800 Macro 900 3 1 Upper
- 95
dBm
-
47dBm
Macro 1800 Macro 1800 4 1 Same
- 84
dBm
-
47dBm
Macro 1800 Micro outdoor 4 1 Lower
- 75
dBm
-
75dBm
Macro 1800
Micro
Metro&indoor 4 1 Same
- 95
dBm
-
47dBm
![Page 37: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/37.jpg)
4/8/2008GSM Radio Network Tuning Course37
Handover Execution
After a target cell has been found, the BSC tries to move the MS to it. To
avoid repetitive handovers or handover attempts in case of a failure,
certain time limits can be set by the parameters minIntBetweenHOReq
(MIH)(HOC)(0..31)(5) and minIntBetweenUnsuccHOAttempt
(MIU)(HOC)(0..31)(3) (the unit is s).
![Page 38: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/38.jpg)
4/8/2008GSM Radio Network Tuning Course38
MIH : The first parameter sets the minimum time between two handovers
related to the same connection.
MIU : The second one indicates the time the MS has to wait after an
unsuccessful handover attempt, before it can try a handover again.
Further important time scales are controlled by the parameters
hoPeriodPBGT (HPP)(HOC)(0..63)(6) and hoPeriodUmbrella
(HPU)(HOC)(0..63)(6) (the unit is SACCH periods). These indicate the
time interval between consecutive estimations of the RX levels of the
adjacent cells for power budget and umbrella handover.
![Page 39: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/39.jpg)
4/8/2008GSM Radio Network Tuning Course39
handover period power budget (HPP)
GSM reference: No ref.
Q3 name: hoPeriodPBGT
Modification: Online
Range: 0..63
MML default: 6 (SACCH Periods)
![Page 40: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/40.jpg)
4/8/2008GSM Radio Network Tuning Course40
![Page 41: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/41.jpg)
4/8/2008GSM Radio Network Tuning Course41
Handover Parameters
![Page 42: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/42.jpg)
4/8/2008GSM Radio Network Tuning Course42
![Page 43: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/43.jpg)
4/8/2008GSM Radio Network Tuning Course43
Handover :
1- periodic Handover
1-1 : power budget Handover
1-2 : Umberla Handover
2- trigger Handover
2-1 : Interference
2-2 : Quality ( rxlevel adj > rxlev source + QMRG)
2-3 : Level (rxlev > SL , rxlevel adj > rxlev source + LMRG)
![Page 44: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/44.jpg)
4/8/2008GSM Radio Network Tuning Course44
Ranking
The condition has to be fulfilled by any kind of handover, except the
umbrella handover
(1a) AV_RXLEV_NCELL (n) > rxLevMinCell (n) (SL)
. The condition has to be fulfilled priodical After 6 SACCH (3S)
(1b) AV_RXLEV_NCELL (n) > hoLevelUmbrella (n) (AUCL)
The parameter hoLevelUmbrella (AUCL)(ADJC)(-110..-47)(-47) defines
![Page 45: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/45.jpg)
4/8/2008GSM Radio Network Tuning Course45
(2a) PBGT > hoMarginPGBT(n) PMRG
PBGT =(AV_RXLEV_DL_HO - AV_RXLEV_NCELL (n))
For handover due to RX level or RX quality also the handover margins
for the RX level and the RX quality are used. This leads to the modified
Condition
(2b) PBGT > hoMarginLevel/Qual(n) (PMRG , QMRG)
![Page 46: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/46.jpg)
4/8/2008GSM Radio Network Tuning Course46
rxLevMinCell (SL) (ADJC)(-110..-47)(-100) hoLevelUmbrella (AUCL) (ADJC)
![Page 47: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/47.jpg)
4/8/2008GSM Radio Network Tuning Course47
![Page 48: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/48.jpg)
4/8/2008GSM Radio Network Tuning Course48
![Page 49: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/49.jpg)
4/8/2008GSM Radio Network Tuning Course49
Handover due to Interference
![Page 50: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/50.jpg)
4/8/2008GSM Radio Network Tuning Course50
![Page 51: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/51.jpg)
4/8/2008GSM Radio Network Tuning Course51
t1:
hoThresholdQualDL > 4
hoThresholdInterferenceDL > -85
N HO triggered (not triggering attempt counter)
AV_RXLEV_NCELL–AV_RXLEV_DL_HO < hoMarginQual (=0)
N No suitable target cell -> Intra HO not possible -> HO fail
(not triggering the failure counter)
t2:
hoThresholdQualDL > 4
hoThresholdInterferenceDL > -85
N HO triggered
AV_RXLEV_NCELL–AV_RXLEV_DL_HO > hoMarginQual (=0)
N HO successful
![Page 52: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/52.jpg)
4/8/2008GSM Radio Network Tuning Course52
![Page 53: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/53.jpg)
4/8/2008GSM Radio Network Tuning Course53
enable HO margin lev qual (MRGS)
GSM reference: No ref.
Q3 name: enableHoMarginLevQual
Range: Y/N
MML default: Y
Description: With this parameter you define whether the handover margins
for
signal level and quality will be taken into account in the handover
decision algorithm.
Related command(s): EAM, EAO
Interference handover
![Page 54: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/54.jpg)
4/8/2008GSM Radio Network Tuning Course54
HO preference order interference DL (HDL)
GSM reference: No ref.
Q3 name: hoPreferenceOrderInterfDL
Range: INTER, INTRA
MML default: INTER
Description: With this parameter you define the order of preference between
intra-cell and inter-cell handovers when the cause of the handover
is downlink interference.
Related command(s): EEM, EEO
a network with frequency hopping. The preferred handover type is set by the parameter
hoPreferenceOrderInterDL/UL (HDL/HUL) (BSC) (INTER,INTRA) (INTER).
The intra cell handover must be enabled using the parameter
enableIntraHOInterDL/UL (EIH/EIC)(HOC)(Y/N)(Y).
Handover due to Interference
![Page 55: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/55.jpg)
4/8/2008GSM Radio Network Tuning Course55
Interference handover
![Page 56: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/56.jpg)
4/8/2008GSM Radio Network Tuning Course56
Interference handover
![Page 57: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/57.jpg)
4/8/2008GSM Radio Network Tuning Course57
Handover Parameters
![Page 58: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/58.jpg)
4/8/2008GSM Radio Network Tuning Course58
Handover Parameters
![Page 59: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/59.jpg)
4/8/2008GSM Radio Network Tuning Course59
Interference handover
![Page 60: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/60.jpg)
4/8/2008GSM Radio Network Tuning Course60
Interference handover
![Page 61: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/61.jpg)
4/8/2008GSM Radio Network Tuning Course61
Now only inter cell handover is possible, so that the handover fails,
if no suitable adjacent cell can be found.
![Page 62: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/62.jpg)
4/8/2008GSM Radio Network Tuning Course62
Interference handover
![Page 63: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/63.jpg)
4/8/2008GSM Radio Network Tuning Course63
Interference handover
![Page 64: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/64.jpg)
4/8/2008GSM Radio Network Tuning Course64
![Page 65: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/65.jpg)
4/8/2008GSM Radio Network Tuning Course65
Handover Parameters
![Page 66: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/66.jpg)
4/8/2008GSM Radio Network Tuning Course66
Handover Parameters
![Page 67: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/67.jpg)
4/8/2008GSM Radio Network Tuning Course67
rxLevMinCell (SL) (ADJC)(-110..-47)(-100) hoLevelUmbrella (AUCL) (ADJC)
![Page 68: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/68.jpg)
4/8/2008GSM Radio Network Tuning Course68
Rxlev sourse < LDR OR LUR
![Page 69: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/69.jpg)
4/8/2008GSM Radio Network Tuning Course69
Handover Parameters
![Page 70: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/70.jpg)
4/8/2008GSM Radio Network Tuning Course70
threshold level uplink Rx level (LUR), Px (LUP), Nx(LUN)
Q3 name: hoThresholdsLevUL
Modification: Online
Range: Rx level: -110..-47 (dBm)
Px: 1..32
Nx: 1..32
MML default: Rx level: -95
Px: 1
Nx: 1
Description: The parameters compare the averaged values of signal strength
uplink measurements for triggering the handover process.
Px: Number of averages that have to be upper/lower than the
threshold.
Nx: Number of averages that have to be taken into account when
making a handover decision.
Related command(s): EHC, EHO, EHS
![Page 71: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/71.jpg)
4/8/2008GSM Radio Network Tuning Course71
![Page 72: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/72.jpg)
4/8/2008GSM Radio Network Tuning Course72
Handover Parameters
![Page 73: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/73.jpg)
4/8/2008GSM Radio Network Tuning Course73
Handover Parameters
![Page 74: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/74.jpg)
4/8/2008GSM Radio Network Tuning Course74
Pure Power Budget Handover
This kind of handover is executed, if an adjacent cell offers a better power budget than the
serving cell, even if the averaged measurements for the serving cell do not exceed a threshold
![Page 75: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/75.jpg)
4/8/2008GSM Radio Network Tuning Course75
enable power budget handover (EPB)
Q3 name: enablePwrBudgetHandover
Range: Y/N
MML default: Y
Description: With this parameter you indicate whether the BTS power
budget
handover control is enabled.
Related command(s): EHC, EHG, EHO
![Page 76: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/76.jpg)
4/8/2008GSM Radio Network Tuning Course76
Handover Parameters
![Page 77: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/77.jpg)
4/8/2008GSM Radio Network Tuning Course77
handover period power budget (HPP)
Q3 name: hoPeriodPBGT
Range: 0..63
MML default: 6 (SACCH Periods)
Description: With this parameter you define the interval between power budget
handover threshold comparisons.
Related command(s): EHC, EHG, EHO
![Page 78: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/78.jpg)
4/8/2008GSM Radio Network Tuning Course78
![Page 79: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/79.jpg)
4/8/2008GSM Radio Network Tuning Course79
![Page 80: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/80.jpg)
4/8/2008GSM Radio Network Tuning Course80
This kind of handover is used for multi layer networks, especially for
such ones with macro and micro cells. Its purpose is to move the MS to
a suitable layer in dependence on its power class. Umbrella handover
must be enabled by setting the parameter enableUmbrellaHandover
(EUM)(HOC)(Y/N)(N) to Y. Than the RX levels of the adjacent cells are
checked periodically, according the value of the parameter hoPeriodUmbrella
Pure Umbrella Handover
![Page 81: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/81.jpg)
4/8/2008GSM Radio Network Tuning Course81
1. Than the RX levels of the adjacent cells are
checked periodically, according the value of the parameter HPU(6SACCH)
2. RXLEV ADJ > AUCL
3. Better target selection
4. Algoritm pri,of,rlev adj
5. Rxlev adj > rxlev serv + LMRG
Condition of Umberella Handover
![Page 82: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/82.jpg)
4/8/2008GSM Radio Network Tuning Course82
After the ranking of the adjacent cells, further conditions must be
checked. First the average signal level AV_RXLEV_NCELL is
considered, which must follow the condition
(1a) AV_RXLEV_NCELL (n) > rxLevMinCell (n) (SL)
(1b) AV_RXLEV_NCELL (n) > hoLevelUmbrella (n) (AUCL)
The parameter hoLevelUmbrella (AUCL)(ADJC)(-110..-47)(-47) defines
the minimum signal level to be allowed for an umbrella adjacent cell.
![Page 83: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/83.jpg)
4/8/2008GSM Radio Network Tuning Course83
Handover Parameters
![Page 84: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/84.jpg)
4/8/2008GSM Radio Network Tuning Course84
Handover Parameters
![Page 85: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/85.jpg)
4/8/2008GSM Radio Network Tuning Course85
Handover Parameters
![Page 86: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/86.jpg)
4/8/2008GSM Radio Network Tuning Course86
� All Types: 33 dbm
Handover Parameters
![Page 87: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/87.jpg)
4/8/2008GSM Radio Network Tuning Course87
� All Types: 30 dbm
Handover Parameters
![Page 88: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/88.jpg)
4/8/2008GSM Radio Network Tuning Course88
General Parameters
� All Types: 80
![Page 89: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/89.jpg)
4/8/2008GSM Radio Network Tuning Course89
All Types: 0
General Parameters
![Page 90: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/90.jpg)
4/8/2008GSM Radio Network Tuning Course90
� All Types: 15 dbm
General Parameters
![Page 91: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/91.jpg)
4/8/2008GSM Radio Network Tuning Course91
� All types: 1
General Parameters
![Page 92: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/92.jpg)
Power Control
4/8/2008GSM Radio Network Tuning Course92
![Page 93: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/93.jpg)
4/8/2008GSM Radio Network Tuning Course93
• In the dedicated mode, both the BTS and the MS transmit with a power
as low as possible for the following reasons.
• On the uplink, the power consumption of each MS is decreased and
thus a longer service time for the rechargeable battery is achieved.
• Both on the uplink and downlink interference is reduced, so that the
network capacity and the spectral efficiency are improved.
This power control is carried out independently for uplink and downlink,
and also independently for each call.
![Page 94: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/94.jpg)
4/8/2008GSM Radio Network Tuning Course94
Power Control Motivation
![Page 95: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/95.jpg)
Power Control Parameters
![Page 96: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/96.jpg)
Power Control Parameters
![Page 97: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/97.jpg)
Power Control Parameters
![Page 98: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/98.jpg)
Power Control Parameters
![Page 99: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/99.jpg)
Power Control Parameters
![Page 100: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/100.jpg)
Power Control Parameters
![Page 101: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/101.jpg)
Power Control Parameters
![Page 102: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/102.jpg)
Power Control Parameters
![Page 103: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/103.jpg)
Power Control Parameters
![Page 104: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/104.jpg)
Power Control Parameters
![Page 105: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/105.jpg)
Power Control Parameters
![Page 106: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/106.jpg)
Power Control Parameters
![Page 107: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/107.jpg)
Power Control Parameters
![Page 108: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/108.jpg)
Power Control Parameters
![Page 109: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/109.jpg)
Power Control Parameters
![Page 110: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/110.jpg)
Power Control Parameters
![Page 111: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/111.jpg)
Power Control Parameters
![Page 112: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/112.jpg)
Power Control Parameters
![Page 113: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/113.jpg)
4/8/2008GSM Radio Network Tuning Course113
![Page 114: 2GSM Radio Network Tuning_Handover (Day 2)](https://reader034.vdocument.in/reader034/viewer/2022042717/55cf9df7550346d033b01220/html5/thumbnails/114.jpg)
4/8/2008GSM Radio Network Tuning Course114