General Nokia BSS Parameters.ppt

Murat.Topcu / 26-03-2003 / General Nokia BSS Parameters

26th of March 2003 - Jeddah

GENERAL NOKIA BSS GENERAL NOKIA BSS PARAMETERSPARAMETERS


RADIO NETWORK BSS PARAMETERS

BSC Parameters (BSC)

BCF Parameters (BCF)

BTS Parameters (BTS)

Handover Control Parameters (HOC)

Power Control Parameters (POC)

Adjacency Parameters (ADJE)

Transceiver Parameters (TRX)

BA List (BAL)

MA List (MAL)


0 7

ts0=bcch/pch/agchts1=sdcch/8

0 7

ts0=bch/sdcch/4/pch/agch

Combined Configuration Time slot 0 contains 1 BCCH, 3 CCCH and 4 SDCCH

0 7

ts0=bcch/pch/agch/sdcch/4

ts1=sdcch/8

Non-Combined Configuration Time slot 0 contains 1 BCCH, 9 CCCH Time Slot x (<>0 of BCCH TRX) contains 8 SDCCH

Hybrid Configuration Time slot 0 contains 1 BCCH, 3 CCCH, and 4 SDCCHTime Slot x (<>0 of BCCH TRX) contains additional 8 SDCCH

Configuration of Signalling Channels


r r rr r r r fr rr r r r r r rr r r rr fr r r r r rr r r r fr r r r rr r r rr fr r r r rr r rr

Uplink

f s bb bb c fc fc sc c c c cc c c fc fsc c c c cc c c f fc c cc cc c c fs fc c cc cc c cs

Downlink 51 TDMA frames = 235ms

r

Time Slot 0

CHANNELS f = FCCH b = BCCH r = RACH s = SCH/SACCH c = CCCH t = SDCCH/4

Non-Combined ConfigurationBCCH/CCCH Multiframe


CHANNELS t = SDCCH/8 s = SACCH/8

t t tt t t t ft tt t t t t t tt t t tt ft t t t t tt t t t fs s s s ss s ss fss ss ss

ss ss s ss fs ss s t tt t t ts ft t t t t tt t t t ft t t t tt t t tt ft t t t tt t tt

Downlink

Uplink

t

t

51 TDMA frames = 235 ms

s

1. 2. 3. 5. 6. 7. 8.4.

Time Slot 1

Non-Combined SDCCH/8 Multiframe


CCCH Configuration

• Number of 51 TDMA frame multiframes (2..9) between transmissions of Paging_Request messages to mobiles of the same paging group.

Page / group every (2 ... 9) * 235 ms = 0.47 ... 2.115 s

• If numberOfBlocksForAccessGrant =0 then AGCH messages would have priority over PCH messages.

• If numberOfBlocksForAccessGrant <> 0 then PCH messages would have priority over AGCH messages .

Capacity can be dynamically shared between PCH and AGCH

numberOfBlocksForAccessGrant Parameter

number of Multiframes Between Paging

• Affects ; • Battery Consumption of the Mobile Station• Speed of Call Setups


Parameters Related to Signalling

Maximum number of RACH sent by the MS = 1 + maxNumberOfRetransmission

BTS Parameter - Group Parameter Name Range DB Default Equation ValueAGCH and Paging channels noOfBlocksForAccessGrant 0 ... 7 3 1 : 1 3

noOfMultiframesBetweenPaging 2 ... 9 4 1 : 1 4

BTS Parameter - Group Parameter Name Range DB Default Equation ValueCell / System Access and RACH maxNumberRetransmission 1, 2, 4 or 7 4 1 : 1 4

numberOfSlotsSpreadTrans 3...12, 14, 16, 20, 25, 32, 50 13 13 -> 25 25msMaxDistanceInCallSetup 0 ... 255 255 0..255 (x550m) 255emergencyCallRestricted Yes / No 0 Yes (1), No (0) No

TRX Parameter - Group Parameter Name Range DB Default Equation Value

Logical Channel Combination chType 0 . . . 9 Plan

TCHF (0) TCHH (1) TCHD (2) SDCCH (3) MBCCH (4) MBCCHC (5) MBCCB (7) SDCCB (8)

NotUsed (9) E-RACH (10)

Plan


Idle Mode Controls

BTS Parameter - Group Parameter Name Range DB Default Equation ValueCell access, reselection cellReselectHysteresis 0 ... 14 3 2*(DB value) 6 dB

cellBarred Yes / No 0 Yes (1), No (0) NonotAllowedAccessClasses 0...9, 11...15 0 list No ClassesplmnPermittedNCC1…7 Y / N 1 1 : 1 All NCCs per.

Extended Cell Radius radiusExtension 0 ... 67 0 1 : 1 Ordinary cell

plmnPermitted : This parameter is confusing. It’s not used for network selection. It’s used AFTER a network has been selected so that only measurements from one/defined PLMN are reportednotAllowedAccessClasses : Mobile Subscribers are uniformly distributed among 10 "access classes" coded 0 … 9. This information is stored in the SIM. To control the load of the RACH the operator can forbid some classes to access the cell. Additional VIP classes are coded between 11 and 15.radiusExtension : The parameter defines cell radius extension of the Improved solution for Extended cell radius.


Cell Selection in idle mode

• Radio Criteria

C1 = (A - Max(B,0))

• A = Received Level Average - p1

• B = p2 - Maximum RF Output Power of the Mobile Station

• p1 = rxLevelAccessMin Min. received level at the MS required for access to the system

• p2 = msTxPowerMaxCCH Max. Tx power level an MS may use when accessing the system

BTS Parameter - Group Parameter Name Range DB Default Equation ValueCell Selection rxLevAccessMin -110 ... -47 8 (DB value) -110 -102 dBm

msTxPwrMaxCCH *GSM* 5 ... 43 5 43 -2*(DB value) 33 dBmmsTxPwrMaxCCH *DCS* 0 ... 30 0 30 -2*(DB value) 30 dBm


Cell Re-Selection in idle mode

Normally the cell re-selection is harmless in terms of signalling from the point of view of the Network.

However when the process involves a change in the Location Area the MS will recognize the need for

Location Update. To avoid ping pong effects on the border of a Location Area, an hysteresis is introduced.

A = 4 dB

B = 6 dB

C = 8 dB• A B C • 1 2

1

2

MS Moving

A B C

LA1 LA2

BTS Parameter - Group Parameter Name Range DB Default Equation ValueCell access, reselection cellReselectHysteresis 0 ... 14 3 2*(DB value) 6 dB


BCCH

BCCH

fast moving mobile

slow moving mobile

time

microcell

macrocell

cell attractiveness

Cell Reselection with C2 - 1



cellReselectParamInd Y C2 reselection parameters are broadcast N C2 reselection parameters are not broadcast

C1 + cellReselectOffset - temporaryOffset*H(penaltyTime-T) <= penaltyTime < 640

C2 =C1 - cellReselectOffset ………………………………………….. <= penaltyTime = 640

1 when T < = penaltyTime H(x) =

0 when T > penaltyTime

BTS Parameter - Group Parameter Name Range DB Default Equation ValueC2 Reselection cellReselectParamInd Y / N 0 Yes (1), No (0) N

cellReselectOffset 0 ... 126 0 2*(DB value) 0 dBpenaltyTime 20 ... 640 1 20*(DB value) 20 sectemporaryOffset 0 ... 70 0 10*(DB value) 0



timepenaltyTime

C1

cellReselectOffset

cellReselectOffset

C2

C2

temporaryOffset

dBC2 when penaltyTime = 640C2 when penaltyTime < 640


Location Update

• MS => MSC / VLR

• Mobile Station switched ON• No IMSI Attach / Detach• Same Location Area => No Location Update• Different Location Area => Location Update

• Change of the Location Area• Location Area under the same MSC / VLR• Location Area under another MSC /VLR => HLR will be updated

• Time Periodic (MS -> MSC/VLR)

BTS Parameter - Group Parameter Name Range DB Default Equation ValueLocation updates allowIMSIAttachDetach Yes / No 1 Yes (1), No (0) Yes

timerPeriodicUpdateMS 0 / 0.1 ... 25.5 40 (DB value / 10) 4 hours


0 7-110-105-100-95-90

-47

1 2 3 4 5 6

rxLevUL = -75 dBm B5

B0

B4B3

B1B2

Idle Channel Interference • The BTS measures and reports on the uplink interference of the radio channels which have been idle during the whole measurement period. • Idle TCH’s are classified into five interference classes• RR Management algorithm assigns a channel from the lowest possible interference class

BTS Parameter - Group Parameter Name Range DB Default Equation ValueInterference processing interferenceAveragingProcess 1 ... 32 6 1 : 1 6

boundary0 -110 … FIXED 0 (DB value) -110 -110 dBmboundary1 -110 ... -47 8 (DB value) -110 -102 dBmboundary2 -110 ... -47 13 (DB value) -110 -97 dBmboundary3 -110 ... -47 18 (DB value) -110 -92 dBmboundary4 -110 ... -47 25 (DB value) -110 -85 dBmboundary5 -47 … FIXED 63 (DB value) -110 -47 dBmcnThreshold 0 ... 63 0 1 : 1 Disabled

=> TS4 will be selected!


TRX Prioritization in TCH Allocation• Normal practice

• TCHs in the lowest Interference Band are considered• TCH is selected from the TRX with lowest traffic load• Rotation of resources in TCH allocation

• TRX Prioritisation in TCH Allocation• BTS Parameter trxPriorityInTCHAlloc

• 0 No prioritization is determined between TRXs • 1 Traffic channel shall be allocated primarily from the BCCH TRX • 2 Traffic channel shall be allocated primarily beyond the BCCH TRX

• The advantages of using the BCCH carrier :• It would not increase interference in the network• BCCH channels are planned to be the least interfered one

• The advantage of using the TCH TRX :• The hopping gain

BTS Parameter - Group Parameter Name Range DB Default Equation Value

BCCH TRX Channel Allocation trxPriorityInTCHAlloc 0 ... 2 01-BCCH, 2-

beyond BCCH No Priority


Frequency Hopping Parameters - 1

btsIsHopping BB (BaseBand Hopping) HoppingMode RF (Radio Frequency Hopping) N (No Hopping)

MA = Mobile AllocationMAIO = Mobile Allocation Index OffsetHSN = Hopping Sequence Number

General Parameters

Baseband Hopping

hoppingSequenceNumber1 (HSN1) (TS 0) 0 ... 63 (0 = cyclic, 1 ... 63 = pseudorandom)

hoppingSequenceNumber2 (HSN2) (TS 1 ... 7) 0 ... 63 (0 = cyclic, 1 ... 63 = pseudorandom)

TRX 1

TRX 2

TRX 3

0 1 72 TS

TRX 4

B f 1

f 2

f 3

f 4

HSN1 HSN2


RF ( Synthesized Hopping)

mobileAllocationList (MA) (E)GSM: 1..124 and 975..1023 GSM 1800: 512..885 GSM 1900: 512..810

Note! Max. 63 Frequencies

mobileAllocationId usedMobileAllocation hoppingSequenceNumber1 (HSN1) 0 … 63 (0 = cyclic, 1 ... 63 = pseudorandom)

TRX 1

TRX 2

TRX 3

0 1 72 TS

TRX 4

B f 1

MA

L(f

3,f

4..

fn)

HSN1

Frequency Hopping Parameters - 2


Frequency Hopping Parameters - 3MAIO

-

0

1

2

-

3

4

5

-

6

7

8

BTS-3

BTS-2

BTS-1

(sect

or

3)

(sect

or

2)

(sect

or

1) f1

f2

f3

f4f5f6f7f8f9f10f11f12

MAIO offset

0

3

6

HSN

3

3

3

TRX-1 BCCH

TRX-2 TCH

TRX-3 TCH

TRX-4 TCH

TRX-5 BCCH

TRX-6 TCH

TRX-7 TCH

TRX-8 TCH

TRX-9 BCCH

TRX-10 TCH

TRX-11 TCH

TRX-12 TCH


Directed Retry (DR) - 1

Time

AssignmentRequest

minTimeLimitDR

maxTimeLimitDR

DR not allowed : improves the reliability of the measurements of adjacent cells and gives the queuing process timeDR allowed

• DR used to avoid the loss of a call in call-setup if the accessed cell is congested• When no TCH is available in serving cell, TCH can be allocated in an adjacent cell (SDCCH TCH HO)• Mobile Originated (MOC) and Mobile Terminated (MTC) Calls• Target cell entry based on DR Method;

• Method 0 - RxLevAccessMin• Method 1 - drThreshold

•Imperative Handover• Candidates ranked based on radio properties.• Steps through candidates (if congested) until MaxTimeLimitDR expires

• Queuing can take place in source cell, not in target cell.

SDCCHTCH

congested


Directed Retry (DR) – 2

BTS Parameter - Group Parameter Name Range DB Default Equation ValueDR and Intelligent DR drInUse Yes / No 1 Yes (1), No (0) Yes

maxTimeLimitDirectedRetry 1 ... 15 5 1 : 1 5 secminTimeLimitDirectedRetry 0 ... 14 3 1 : 1 3 sec

drMethod 0 … 1 10-basic

1-threshold evaluated

Threshold Evaluated Method

BSC Parameter - Group Parameter Name Range DB Default Equation ValueDirected Retry disableExtDr Yes / No 1 Yes (1), No (0) Yes

ADJE Parameter - Group Parameter Name Range DB Default Equation ValueDirected Retry drThreshold -47 ... -110 20 (DB value) -110 -90 dBm


Dropped Call Control

Radio Link Timeout

• A counter is initialized at the value of the radioLinkTimeout

• When SACCH is not correctly received

• Counter decremented by 1

• When SACCH correctly received Counter incremented by 2

• When counter reaches 0 call is released

• Same behaviour UL and DL

Radio Link Timeout

• A counter is initialized at the value of the radioLinkTimeout

• When SACCH is not correctly received

• Counter decremented by 1

• When SACCH correctly received Counter incremented by 2

• When counter reaches 0 call is released

• Same behaviour UL and DL

Call re-establishment

• In case of a Radio Link Failure (radioLinkTimeout) within 20 seconds.

• Measurements averaged over 5 seconds for

serving Cell BCCHadjacent Cell BCCHs

• Strongest is consideredBCCH data decoded (cell selection param.)

If C1 greater than 0, Cell not barredCell belong to selected PLMN, Call re-establishment allowed

• Call re-establishment attempted

Call re-establishment

• In case of a Radio Link Failure (radioLinkTimeout) within 20 seconds.

• Measurements averaged over 5 seconds for

serving Cell BCCHadjacent Cell BCCHs

• Strongest is consideredBCCH data decoded (cell selection param.)

If C1 greater than 0, Cell not barredCell belong to selected PLMN, Call re-establishment allowed

• Call re-establishment attemptedBTS Parameter - Group Parameter Name Range DB Default Equation ValueDropped Call Control radioLinkTimeout 4 ... 64 4 4* (DB value + 1) 20 SACCH

callReestablishmentAllowed Yes / No 0 Yes (1), No (0) No


Indoor

Elevator

5. floor

1. floor

MS

radioLinkTimeout = 30 ?

radioLinkTimeout (default) = 20

Outdoor

MS

Tunnel (short)

Radio Link Timeout, Call Re-establishment

MS

Tunnel (long)

BTS A

BTS B

Unsuccessfull Handover=> Call Re-Establishment


MEASUREMENT PROCESSING

Measurements Measurements

BtsMeasAverage

AveragingWindow SizeAdjCellAllAdjacentCellsAveragedNumberOfZeroResults

AveragingAveraging

AveragingAveraging

BookkeepingBookkeeping

ho/pc_Averaging_Lev/Qual_UL/DLWindowSize

WeightmsDistanceAveragingParameter

WIndowSize

DTXMode

Measurements Measurements

Handover ?

EnaFastAveCallSetupEnaFastAvePCEnaFastAveHO

MS + BTS

MS


Pre-processing in BTS

• For MS and BTS measurements

• Average measurements over 1, 2, 3 or 4 SACCH-period

• Cause a delay (btsMeasAver-1) x 480 ms

• Reduce a transmission load and a processing load in BSC

• Needed in Abis interface when 16 kbit signalling is used with half rate . !

BTS Parameter - Group Parameter Name Range DB Default Equation ValueAveraging btsMeasAver 1 ... 4 1 1 : 1 No Averaging


Averaging and Sampling

HoThresholdLevDL = 33 (= -77 dBm) WindowSize = 5, Weighting = 1Px = 3, Nx = 4btsMeasAver = 1 (no pre-processing in BTS)

30 2550 3545 40 1520 10

480 ms AVERAGE=40, P=0

AVERAGE=35, P=0

AVERAGE=30, P=1

AVERAGE=25, P=2

AVERAGE=20, P=3

Handover attempt

HOC Parameter - Group Parameter Name Range DB Default Equation ValueAveraging windows and weighting values hoAveragingLevDL 1 ... 32 4 1 : 1 4

weighting 1 ... 3 1 1 : 1 1hoAveragingLevUL 1 ... 32 4 1 : 1 4weighting 1 ... 3 1 1 : 1 1hoAveragingQualDL 1 ... 32 1 1 : 1 1weighting 1 ... 3 1 1 : 1 1hoAveragingQualUL 1 ... 32 1 1 : 1 1weighting 1 ... 3 2 1 : 1 2msDistanceAveragingParam 1 ... 32 10 1 : 1 10msSpeedAveraging 1 ... 32 4 1 : 1 4


AV_RXLEV_UL_PC = 2x35 + 1x42 + ... + 2x35 2+1+2+2+1+1+1+2

= 36

DTX and Weighting

• DTX is allowed just on TCH

• “SUB”- measurement results are reported when DTX is used

Sample: 1 2 3 4 5 6 7 8

DTX used:0 1 0 0 1 1 1 0

uplink level: 35 42 33 36 39 40 39 35

Example

pcAveragingLevUL

windowSize= 8

weighting=2

BTS Parameter - Group Parameter Name Range DB Default Equation Value

dtxMode 0 ... 2 10-May use DTX 1- Shall use DTX 2-Not use DTX

Shall use DTX


Example

allAdjacentCellsAveraged = NonumberOfZeroResults = 2AveragingWindowSizeAdjCell = 8

Measurement Processing

• BSC is able to maintain up to 32 last measurement results of 32 adjacent cells

• Mobile reports to BSC 6 best results and the rest are 0 (= -110 dBm)

• Zero Results can be eliminated from averaging ( up to 7 )

• All adjacent cells can be averaged or just 6 best ( reported by the mobile )

Sample: 1 2 3 4 5 6 7 81 -65 -67 -71 -69 -72 -70 -73 -712 -73 -75 -74 -75 -76 -77 -75 -773 -77 0 -80 -79 -81 -79 0 -804 -85 -83 -87 -88 -84 0 -86 -875 -90 -94 -91 -90 -95 -93 -92 -906 -97 -99 -98 -99 -96 -97 0 0

HOC Parameter - Group Parameter Name Range DB Default Equation ValueAveraging adjacent cells averagingWindowSizeAdjCell 1 ... 32 6 1 : 1 6

numberOfZeroResults 0 ... 7 2 1 : 1 2allAdjacentCellsAveraged Yes / No 0 Yes (1), No (0) No


Handover 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 HOCHANNEL 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


Handover Decision & Priority

Handover priority

1. Uplink and downlink Interference2. Uplink quality3. Downlink quality4. Uplink level 5. Downlink level6. Distance7. Rapid Field Drop8. Slow moving MS9. Better cell i.e. Periodic check (Power Budget HO or Umbrella HO)10. PC: Lower quality/level thresholds (UL/DL)11. PC: Upper quality/level thresholds (UL/DL)

Handover process may be triggered by

• Quality, field strength or distance values fall below/exceed their threshold• Periodic checks


Power Budget Handover

• Trigger

• Periodic Check ( hoPeriodPBGT )

HOC Parameter - Group Parameter Name Range DB Default Equation ValuePeriodic Handovers hoPeriodPBGT 0 ... 63 2 1 : 1 2 SACCH HO types allowed enablePwrBudgetHandover Yes / No 1 Yes (1), No (0) Yes

ADJE Parameter - Group Parameter Name Range DB Default Equation ValueMargins hoMarginPBGT -24 ... 63 6 1 : 1 6 dB

ADJE Parameter - Group Parameter Name Range DB Default Equation ValueCell area definition rxLevMinCell -110 ... -47 10 (DB value) -110 -100 dBm

msTxPwrMaxCell *GSM* 5 ... 43 5 43 -2*(DB value) 33 dBmmsTxPwrMaxCell *DCS* 0 ... 36 0 30 -2*(DB value) 30 dBm


Handover due to Level

• Trigger • Threshold Comparison ( hoThresholdsLevUL/DL (px - nx) )

HOC Parameter - Group Parameter Name Range DB Default Equation ValueThresholds hoThresholdsLevDL -110 ... -47 20 (DB value) -110 -90 dBm

px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1hoThresholdsLevUL -110 ... -47 17 (DB value) -110 -93 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1

ADJE Parameter - Group Parameter Name Range DB Default Equation ValueMargins hoMarginLev -24 ... 24 3 1 : 1 3 dB




Handover due to Quality• Trigger

• Threshold Comparison ( hoThresholdsQualUL/DL (px - nx) )

HOC Parameter - Group Parameter Name Range DB Default Equation ValueHopping cells hoThresholdsQualDL 0 ... 7 5 1 : 1 5

px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6

Hopping cells hoThresholdsQualUL 0 ... 7 5 1 : 1 5px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6

Non-hopping cells hoThresholdsQualDL 0 ... 7 4 1 : 1 4px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6

Non-hopping cells hoThresholdsQualUL 0 ... 7 4 1 : 1 4px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6

ADJE Parameter - Group Parameter Name Range DB Default Equation ValueMargins hoMarginQual -24 ... 24 0 1 : 1 0 dB




Handover due to Interference (1)

• Trigger : Threshold Comparison • Threshold Comparison for Quality ( hoThresholdsQualUL/DL (px - nx) )• Threshold Comparison for Level ( hoThresholdsInterferenceUL/DL (px -

nx) )

• Candidate Selection• Priority InterCell / Intracell selected at BSC independently UL / DL • Priority Inter

• Quality HO if Any Target • Otherwise Intra Cell HO

• Priority Inter• Intra Cell HO

HOC Parameter - Group Parameter Name Range DB Default Equation ValueHO types allowed enableIntraHoInterfUL Yes / No 0 Yes (1), No (0) No

enableIntraHoInterfDL Yes / No 0 Yes (1), No (0) No

BSC Parameter - Group Parameter Name Range DB Default Equation ValueHandover hoPreferenceOrderInterfDL INTER / INTRA 0 Inter(0), Intra (1) INTER

hoPreferenceOrderInterfUL INTER / INTRA 0 Inter(0), Intra (1) INTER


Handover due to Interference (2)

hoThresholdQualDL = 4hoThresholdInterferenceDL = -75 dBmhoPreferenceOrderInterfDL = intra

Handover Attempt

A

B

- Field strength higher than threshold- Bad quality=> interference=> intra cell handover !!

Threshold (Lev) -75 dBm

5

0

HOC Parameter - Group Parameter Name Range DB Default Equation ValuehoThresholdsInterferenceDL -110 ... -47 35 (DB value) -110 -75 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1hoThresholdsInterferenceUL -110 ... -47 35 (DB value) -110 -75 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1


Fast Moving MS Handling in Macro Cell

Adjacent cell layer definition

upper layer (macro)

same layer (serving layer)

lower layer (micro)

N (not in use)

ADJE Parameter - Group Parameter Name Range DB Default Equation ValueFast Moving MS in macro cell hoLevelUmbrella -110 ... -47 Plan (DB value) -110 Plan

fastMovingThreshold 0 ... 255 Plan 1 : 1, 0: Not in use Plan

adjCellLayer N/SAME/LOWER/UPPER Plan

Not used (0) Same layer (1) Upper layer (2) Lower layer (3)

Plan


• 0 : Release immediately• 1 - 60 : Release after certain time 1 - 60 s, try handover during that time• 255 : No release, only imperative Handover attempt

Imperative Handover (Distance)

• The Handover is considered to be imperative:• Handover due to Distance• Order to empty a cell ( from O&M )• Directed Retry and IDR

HOC Parameter - Group Parameter Name Range DB Default Equation ValueenableMSDistanceProcess Yes / No 0 Yes (1), No (0) No

HOC Parameter - Group Parameter Name Range DB Default Equation ValuemsDistanceHoThresholdParam 0 ... 63 63 1 : 1 63px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1

BSC Parameter - Group Parameter Name Range DB Default Equation ValuemsDistanceBehaviour 0 ... 60, 255 255 0, 1-60 sec., 255 No release


POWER CONTROL-1

Uplink Level

Uplink Quality AV_RXQUAL_UL_PC

AV_RXLEV_UL_PC

Downlink Level

Downlink Quality AV_RXQUAL_DL_PC

AV_RXLEV_DL_PC

POWER CONTROL

UPLINK

POWER CONTROL

UPLINK

THRESHOLD COMPARISON

Separate Averaging Parameters

For Handover and for Power Control

POWER CONTROL

DOWNLINK

POWER CONTROL

DOWNLINK

PCINTERVAL

POC Parameter - Group Parameter Name Range DB Default Equation ValueBTS power control powerCtrlEnabled Yes / No 1 Yes (1), No (0) YesInterval powerControlInterval 0 ... 31 1 1 : 1 1 secStep sizes powerIncrStepsize 2,4 or 6 2 2 dB (0), 4dB (1), 6dB (2) 6 dB

powerRedStepsize 2 or 4 0 2dB (0), 4dB (1) 2 dB


POWER CONTROL-2POC Parameter - Group Parameter Name Range DB Default Equation ValueThresholds pcLowerThresholdsLevDL -110 ... -47 23 DB value -110 -87 dBm

px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcLowerThresholdsLevUL -110 ... -47 20 DB value -110 -90 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcLowerThresholdsQualDL 0 ... 7 3 1 : 1 3px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcLowerThresholdsQualUL 0 ... 7 3 1 : 1 3px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcUpperThresholdsLevDL -110 ... -47 40 DB value -110 -70 dBmpx 1 ... 32 3 1 : 1 3nx 1 ... 32 4 1 : 1 4pcUpperThresholdsLevUL -110 ... -47 40 DB value -110 -70 dBmpx 1 ... 32 3 1 : 1 3nx 1 ... 32 4 1 : 1 4pcUpperThresholdsQualDL 0 ... 7 0 1 : 1 0px 1 ... 32 3 1 : 1 32nx 1 ... 32 4 1 : 1 32pcUpperThresholdsQualUL 0 ... 7 0 1 : 1 0px 1 ... 32 3 1 : 1 32nx 1 ... 32 4 1 : 1 32


POWER CONTROL-3

POC Parameter - Group Parameter Name Range DB Default Equation ValueAveraging windows pcAveragingLevDL 1 ... 32 4 1 : 1 4 SACCH

weighting 1 ... 3 1 1 : 1 1pcAveragingLevUL 1 ... 32 4 1 : 1 4 SACCHweighting 1 ... 3 1 1 : 1 1pcAveragingQualDL 1 ... 32 1 1 : 1 1 SACCHweighting 1 ... 3 1 1 : 1 1pcAveragingQualUL 1 ... 32 1 1 : 1 1 SACCHweighting 1 ... 3 1 1 : 1 1

POC Parameter - Group Parameter Name Range DB Default Equation ValueBase station power range bsTxPwrMin 0 ... 30 7/Plan -2*(DB value) -14 dB

bsTxPwrMax 0 ... 30 0/Plan -2*(DB value) - 0 dB


State Diagram for HO and PC

0

1

2

3

4

5

6

7-102 -95 -90 -85 -75 -70 -65 -60 -55 -50

PcUpperThresholdQualUL/DL (0)

HoThresholdQualUL/DL (4/5)

Power decreaseNoactionneeded

Interference HoQuality Ho

LevHo

PcLevUpperThresholdLevUL/DL(-70dBm)

HoThresholdLevDL(-90dBm)

PcLowerThresholdLevUL/DL(-87 / -90dBm)

HoThresholdInterferenceUL/DL(-75dBm)

PcLowerThresholdQualUL/DL (3)

HoThresholdLevUL (-93dBm)RxLevMinCell(n) (-100 dBm)

RxLevAccMin (-102 dBm)

Power increase

-100


BSC PARAMETERS

Group Explanation Parameter Name Range DB Default Equation ValueCell Defination for gsmMacrocellThreshold 5 ... 43 2 43 - 2*(DB value) 39 dBmmultilayer network gsmMicrocellThreshold 5 ... 43 2 43 - 2*(DB value) 39 dBm dcsMacrocellThreshold 0 ... 36 2 30 - 2*(DB value) 26 dBm dcsMicrocellThreshold 0 ... 36 3 30 - 2*(DB value) 24 dBmMSC Ho Disable internal ho disableIntHo Yes / No 0 Yes (1), No (0) No

Number of preferred cells genHandoverRequestMessage 1 ... 16 6 1 : 1 6Directed Retry Disable external directed retry disableExtDr Yes / No 1 Yes (1), No (0) YesHandover Ho Preference order Interference DL/UL hoPreferenceOrderInterfDL INTER / INTRA 0 Inter(0), Intra (1) INTER

hoPreferenceOrderInterfUL INTER / INTRA 0 Inter(0), Intra (1) INTERmsDistanceBehaviour 0 ... 60, 255 255 0, 1-60 sn., 255 No release

Uplink interference level calculations rxLevBalance 0 … 20 5 1 : 1 5 dBAdvanced Mulilayer Handling BSC TRHO, upper threshold for BTS load amhUpperLoadThreshold 0 … 100 80 1 : 1 80%

Dual Band/micro, lower thresh. for BTS load amhLowerLoadThreshold 0 … 100 20 1 : 1 20%BSC TRHO, max traffic load of an adj cell amhMaxLoadOfTargetCell 0 … 100 70 1 : 1 70%BSC TRHO, guard time for going back to org. cell amhTrhoGuardTime 0 … 120 30 1 : 1 30 sec.

Half Rate "Opt." Lower limit for FR TCH resources btsLoadDepTCHRate 0 ... 100 100 1 : 1 100%Upper limit for FR TCH resources btsLoadDepTCHRate 0 ... 100 0 1 : 1 0%Target cell and channel type selection tchRateInternalHO 1 .. 5 1 1 to 5 Actual Rate

General BSC Parameters


General BTS Parameters-1 BTS PARAMETERS

Group Explanation Parameter Name Range DB Default Equation

BCCH TRX Channel Allocation TRX Priority in TCH Allocation trxPriorityInTCHAlloc 0 ... 2 01-BCCH, 2-beyond

BCCHnotAllowedAccessClasses 0...9, 11...15 0 list

Short Message Service Cell Broadcast smsCBUsed Yes / No 0 Yes (1), No (0)

Discontinuous Transmission dtxMode 0 ... 2 10-May use, 2-Not

use DTXDropped Call Control cellBarred Yes / No 0 Yes (1), No (0)

radioLinkTimeout 4 ... 64 4 4* (DB value + 1)Averaging btsMeasAver 1 ... 4 1 1 : 1AGCH and Paging channels Blocks for access grant, separated noOfBlocksForAccessGrant 0 ... 7 3 1 : 1

Number of multiframes between paging noOfMultiframesBetweenPaging 2 ... 9 4 1 : 1Location updates allowIMSIAttachDetach Yes / No 1 Yes (1), No (0)

Periodic MS location update timerPeriodicUpdateMS 0 / 0.1 ... 25.5 40 (DB value / 10)HO control process BTS load threshold btsLoadThreshold 0 ... 100 70 1 : 1

# of physical info messages during ho maxNumberOfRepetitions 5 ... 35 5 1 : 1Cell / System Access Rach controlling maxNumberRetransmission 1, 2, 4 or 7 4 1 : 1and RACH numberOfSlotsSpreadTrans 3...12, 14, 16, 20, 25, 32, 50 13 13 -> 25

msMaxDistanceInCallSetup 0 ... 255 255 0..255 (x550m)emergencyCallRestricted Yes / No 0 Yes (1), No (0)

Cell selection cellReselectHysteresis 0 ... 14 3 2*(DB value)and Reselection rxLevAccessMin -110 ... -47 8 (DB value) -110

callReestablishmentAllowed Yes / No 0 Yes (1), No (0)max transmit power msTxPwrMaxCCH *GSM* 5 ... 43 5 43 -2*(DB value)

msTxPwrMaxCCH *DCS* 0 ... 30 0 30 -2*(DB value)max. transmit pwr for class III mobile powerOffset *DCS only* 0 ... 6 0 2*(DB value)

C2 Reselection cellReselectParamInd Y / N 0 Yes (1), No (0)cellReselectOffset 0 ... 126 0 2*(DB value)penaltyTime 20 ... 640 1 20*(DB value)temporaryOffset 0 ... 70 0 10*(DB value)cellBarQualify Y / N 0 Yes (1), No (0)


General BTS Parameters-2

BTS PARAMETERS

Group Explanation Parameter Name Range DB Default EquationMS power range max pwr in serving cell minMSTxPower *GSM* 5 ... 43 15 43 -2*(DB value)

minMSTxPower *DCS* 0 ... 36 15 30 -2*(DB value)msTxPwrMax *GSM* 5 ... 43 5 43 -2*(DB value)msTxPwrMax *DCS* 0 ... 36 0 30 -2*(DB value)

Interference processing Averaging Period interferenceAveragingProcess 1 ... 32 6 1 : 15 Interference bands for the unallocated TSs boundary0 -110 … FIXED 0 (DB value) -110

boundary1 -110 ... -47 8 (DB value) -110boundary2 -110 ... -47 13 (DB value) -110boundary3 -110 ... -47 18 (DB value) -110boundary4 -110 ... -47 25 (DB value) -110boundary5 -47 … FIXED 63 (DB value) -110

Min. C/N when allocating a TS cnThreshold 0 ... 63 20 1 : 1DR and Intelligent DR Directed Retry drInUse Yes / No 1 Yes (1), No (0)

target cell evaluation is allowed maxTimeLimitDirectedRetry 1 ... 15 5 1 : 1target cell evaluation is not allowed minTimeLimitDirectedRetry 0 ... 14 3 1 : 1Directed Retry Method drMethod 0 … 1 1 0-basic, 1-thres.

Frequency Hopping Hopping Mode hoppingMode NN / BB / RF Plan NN/BB/RFhoppingSequenceNumber1&2 0 ... 63 Plan 1 : 1maioOffset 0 ... 62 Plan 1 : 1measurementBCCHAllocation ADJ / IDLE 1 1-ADJ, 0-IDLE

Extended Cell Radius BTS type DE21/DF12 radiusExtension 0 ... 67 0 1 : 1Dual Band multiBandCell Yes / No 1 Yes (1), No (0)

earlySendingIndication Y / N 1 Yes (1), No (0)# of adjacent cells from other freq. band multiBandCellReporting 0 ... 3 3 1 : 1

Half Rate Lower limit for FR TCH resources btsLoadDepTCHRate 0 ... 100 100 1 : 1FR/HR channel allocation method Higher limit for FR TCH resources btsLoadDepTCHRate 0 ... 100 0 1 : 1

Target cell and channel type selection tchrateIntraCellHo 0 .. 4 0 List


General HOC Parameters-1Group Parameter Name Range DB Default Equation Value

Averaging adjacent cells averagingWindowSizeAdjCell 1 ... 32 6 1 : 1 6numberOfZeroResults 0 ... 7 2 1 : 1 2allAdjacentCellsAveraged Yes / No 0 Yes (1), No (0) No

Ho Measurement Averaging Method enaFastAveCallSetup Yes / No 0 Yes (1), No (0) NoenaFastAveHo Yes / No 0 Yes (1), No (0) NoenaFastAvePC Yes / No 0 Yes (1), No (0) No

Minimum Intervals minIntBetweenUnsuccHoAttempt 0 ... 30 3 1 : 1 3 intervalminIntBetweenHoReq 0 ... 30 5 1 : 1 5 interval

Periodic Handovers hoPeriodPBGT 0 ... 63 2 1 : 1 2 SACCH HoPeriodUmbrella 0 ... 63 63 1 : 1 63 SACCH

HO types allowed enableIntraHoInterfUL Yes / No 0 Yes (1), No (0) NoenableIntraHoInterfDL Yes / No 0 Yes (1), No (0) NoenablePwrBudgetHandover Yes / No 1 Yes (1), No (0) YesenableUmbrellaHandover Yes / No 0 Yes (1), No (0) NoenableMSDistanceProcess Yes / No 0 Yes (1), No (0) NoenableSDCCHHandover Yes / No 0 Yes (1), No (0) No

Averaging windows and weighting values hoAveragingLevDL 1 ... 32 4 1 : 1 4weighting 1 ... 3 1 1 : 1 1hoAveragingLevUL 1 ... 32 4 1 : 1 4weighting 1 ... 3 1 1 : 1 1hoAveragingQualDL 1 ... 32 1 1 : 1 1weighting 1 ... 3 1 1 : 1 1hoAveragingQualUL 1 ... 32 1 1 : 1 1weighting 1 ... 3 2 1 : 1 2msDistanceAveragingParam 1 ... 32 10 1 : 1 10msSpeedAveraging 1 ... 32 4 1 : 1 4


General HOC Parameters-2Group Parameter Name Range DB Default Equation Value

Thresholds hoThresholdsLevDL -110 ... -47 20 (DB value) -110 -90 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1hoThresholdsLevUL -110 ... -47 17 (DB value) -110 -93 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1

Hopping cells hoThresholdsQualDL 0 ... 7 5 1 : 1 5px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6

Hopping cells hoThresholdsQualUL 0 ... 7 5 1 : 1 5px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6

Non-hopping cells hoThresholdsQualDL 0 ... 7 4 1 : 1 4px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6

Non-hopping cells hoThresholdsQualUL 0 ... 7 4 1 : 1 4px 1 ... 32 4 1 : 1 4nx 1 ... 32 6 1 : 1 6hoThresholdsInterferenceDL -110 ... -47 35 (DB value) -110 -75 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1hoThresholdsInterferenceUL -110 ... -47 35 (DB value) -110 -75 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1msDistanceHoThresholdParam 0 ... 63 63 1 : 1 63px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1


General POC Parameters-1

Group Parameter Name Range DB Default Equation ValueBTS power control powerCtrlEnabled Yes / No 1 Yes (1), No (0) YesInterval powerControlInterval 0 ... 31 1 1 : 1 1 secStep sizes powerIncrStepsize 2,4 or 6 2 2 dB (0), 4dB (1), 6dB (2) 6 dB

powerRedStepsize 2 or 4 0 2dB (0), 4dB (1) 2 dBrfMaxPowerReduction 0 ... 12 0 2*(DB value) 0 dB

UL signal quality bands pwrDecrLimitBand0 0 ... 38 19 2*(DB value) 38 dBpwrDecrLimitBand1 0 ... 38 19 2*(DB value) 38 dBpwrDecrLimitBand2 0 ... 38 19 2*(DB value) 38 dBpwrDecrQualFactor 0 / 1 1 1 : 1 1

Base station power range bsTxPwrMin 0 ... 30 7/Plan -2*(DB value) -14 dBbsTxPwrMax 0 ... 30 0/Plan -2*(DB value) - 0 dB

Averaging windows pcAveragingLevDL 1 ... 32 4 1 : 1 4 SACCHweighting 1 ... 3 1 1 : 1 1pcAveragingLevUL 1 ... 32 4 1 : 1 4 SACCHweighting 1 ... 3 1 1 : 1 1pcAveragingQualDL 1 ... 32 1 1 : 1 1 SACCHweighting 1 ... 3 1 1 : 1 1pcAveragingQualUL 1 ... 32 1 1 : 1 1 SACCHweighting 1 ... 3 1 1 : 1 1


General POC Parameters-2

Group Parameter Name Range DB Default Equation ValueThresholds pcLowerThresholdsLevDL -110 ... -47 23 DB value -110 -87 dBm

px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcLowerThresholdsLevUL -110 ... -47 20 DB value -110 -90 dBmpx 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcLowerThresholdsQualDL 0 ... 7 3 1 : 1 3px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcLowerThresholdsQualUL 0 ... 7 3 1 : 1 3px 1 ... 32 1 1 : 1 1nx 1 ... 32 1 1 : 1 1pcUpperThresholdsLevDL -110 ... -47 40 DB value -110 -70 dBmpx 1 ... 32 3 1 : 1 3nx 1 ... 32 4 1 : 1 4pcUpperThresholdsLevUL -110 ... -47 40 DB value -110 -70 dBmpx 1 ... 32 3 1 : 1 3nx 1 ... 32 4 1 : 1 4pcUpperThresholdsQualDL 0 ... 7 0 1 : 1 0px 1 ... 32 3 1 : 1 32nx 1 ... 32 4 1 : 1 32pcUpperThresholdsQualUL 0 ... 7 0 1 : 1 0px 1 ... 32 3 1 : 1 32nx 1 ... 32 4 1 : 1 32


General ADJE Parameters

ADJE Parameter - Group Parameter Name Range DB Default Equation ValueenableHoMarginLevQual Yes / No 1 Yes (1), No (0) YestrhoTargetLevel -109 ... -47/ N Plan (DB value) -110 Plansyncronised Yes / No 0 Yes (1), No (0) No

Fast Moving MS in macro cell hoLevelUmbrella -110 ... -47 Plan (DB value) -110 PlanfastMovingThreshold 0 ... 255 Plan 1 : 1, 0: Not in use Plan

adjCellLayer N/SAME/LOWER/UPPER Plan

Not used (0) Same layer (1) Upper layer (2) Lower layer (3)

Plan

Cell area definition rxLevMinCell -110 ... -47 10 (DB value) -110 -100 dBmmsTxPwrMaxCell *GSM* 5 ... 43 5 43 -2*(DB value) 33 dBmmsTxPwrMaxCell *DCS* 0 ... 36 0 30 -2*(DB value) 30 dBm

Priority of the adjacent cell hoPriorityLevel 0 ... 7 3 1 : 1 3

hoLoadFactor 0 ... 7 2 1 : 1 1Margins hoMarginPBGT -24 ... 63 6 1 : 1 6 dB

hoMarginLev -24 ... 24 3 1 : 1 3 dBhoMarginQual -24 ... 24 0 1 : 1 0 dB

Documents

General Nokia BSS Parameters.ppt