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Radio Network Parameter Sharing Session

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The following structure can be used for BR and BSS parameter

GSM idle mode and cell (re)-selection

Power control

Handover control

Half rate setting

Handover strategy between different layer in existing network

C1 + CELL_RESELECT_OFFSET TEMPORARY OFFSET for PENALTY_TIME 640 s

C1 - CELL_RESELECT_OFFSET for PENALTY_TIME = 640 s C2 =

serving cell:

C2:

List of 6

strongest

carriers:

C2: C2: C2: C2: C2: C2:

0 .. 126 dB

step size: 2 dB

0, 10, 20, 30, 40,

50, 60, dB

PENALTY_TIME

TEMPORARY OFFSET

CELL_RESELECT_OFFSET

C1

C2

T

new candidate

= formerly non-

serving cell

CELL_RESELECT_OFFSET

C1

C2

T

new candidate

= former serving

cell

no TEMPORARY OFFSET

C1 & C2 Criterion

C1 = A max(B,0) = RLA_C RXLEV_ACCESS_MIN max(MS_TXPWR_MAX_CCH P , 0)

RLA_C = avg received RxLev on BCCH

P = MS max output power

cell 1

cell 2

cell 3

C2

time 5 seconds

cell

reselection

5 seconds

CELL_RESELECT_

HYSTERESIS (HYS)

LAC = A LAC = B

cell reselection &

location update

Cell Reselection Based on Pathloss Criterion C2


BR Parameter BSS Parameter RXLEVAMI

object: BTS [BASICS]

unit: 1 dB

range: 0..63

0 = less than -110dBm

1 = -110dBm to -109dBm

2 = -109dBm to -108dBm

...

62 = -49dBm to -48dBm

63 = greater than -48dBm

default: 6

RXLEV access minimum, this parameter defines the minimum DL

receive level the MS must receive from the serving cell in order to

be allowed to access to the network via the RACH.

rxlev access min (RXP)

object : BTS

Range : -110...-47

Default : -105 dBm

With this parameter you define the minimum power level

an MS has to receive before it is allowed to access the

cell.

MSTXPMAXCH

object: BTS [CCCH]

range: 0..31

default: 5

MS maximum transmit power for CCCH, indicates

- the maximum transmit power level a MS is allowed to use when

it accesses the cell on the Random Access Channel' (RACH) and

- the initial power the Ms is allowed to use on the dedicated

control channel (SDCCH or TCH) after an IMMEDIATE

ASSIGNMENT.

MS txpwr max CCH (TXP1)

object BTS

Range : 5...39

Default : 33 dBm

With this parameter you define the maximum

transmission power an MS may use when accessing a

CCH in the cell for GSM 900/800 bands.

MS txpwr max CCH1x00 (TXP2)

object : BTS

Range : 0...36

Default : 30 dBm

With this parameter you define the maximum

transmission power an MS may use when accessing a

CCH in the cell for GSM 1800/1900 bands.


BR Parameter BSS Parameter MSTXPMAXGSM


unit: see tables below

range: 2..15

default: 5

Maximum transmission power level in GSM target cell, indicates

the maximum transmission power level a MS is allowed to use in

the GSM target cell.

MS txpwr max GSM (PMAX1)

object : BTS

Range : 5...39

Default : 33 dBm

With this parameter you define the maximum power

level an MS may use in the serving cell for GSM 800

and GSM 900 bands.

MSTXPMAXDCS


unit: see tables below

range: 0..15

default: 0

Maximum transmission power for DCS 1800, this parameter

defines the maximum transmission level a MS is allowed to use on

a dedicated channel (TCH and SDCCH) in the serving cell.

MS txpwr max GSM1x00 (PMAX2)

object : BTS

Range : 0...36

Default : 30 dBm

With this parameter you define the maximum power

level an MS may use in the serving cell for DCS 1800/1900.

CRESPARI


range: 0=C2 parameters not present

1=C2 parameters present

default: 1

Cell reselection parameter indicator, indicates the presence of C2

cell reselection parameters on the BCCH

The criterion C2 is an optional feature that can be enabled on a cell

basis. It is an enhancement of the cell selection C1 (for C1 please

see parameter CELLRESH). C2, however, is useful for microcell

configurations since it prevents fast moving MSs from performing

unnecessary cell reselections.

cell reselection parameter index (PI)

object : BTS

Range : C2 reselection parameters are not broadcast (N) (0), C2

reselection parameters are broadcast (Y) (1)

Default : C2 reselection parameters are not broadcast (N) (0)

With this parameter you define whether C2 reselection

parameters are broadcast to mobile stations. The C2

cell reselection allows you to define other criteria for cell

reselection in addition to power level.


BR Parameter BSS Parameter CRESOFF


unit: 2dB

range: 0..63

default: 1

Cell reselection offset. It applies an offset to the cell

reselection criterion C2. This parameter only has to be set

if CRESPARI is set to '1'.

cell reselect offset (REO)

object : BTS

Range : 0...126

Default : 0 dB

With this parameter you define the offset of the C2

reselection criterion for a cell.

TEMPOFF


unit: 10dB

range: 0..7, 7= default: 1

Temporary offset. It applies a negative offset to C2 for the

duration of the penalty time.

temporary offset (TEO)

object BTS

Range : 0...70

Default : 0 dB

With this parameter you define the negative offset of the

C2 reselection criterion for the duration of the penalty

time (PET) after the MS has placed the cell on the list

of the strongest carriers. The parameter can be

changed in 10 dB steps. Value 70 dB means infinity.

PENTIME


unit: 20s

range: 0..31

31= TEMPOFF ignored

default: 0

Penalty time, sets the duration for which the temporary

offset is

applied

penalty time (PET)

object : BTS

Range : 20...640

Default : 20 s

With this parameter you define the duration for which

the temporary offset (TEO) applies. The parameter can

be changed in steps of 20 s. Value 640 s indicates that

the sign of the cell reselect offset (REO) parameter will

be changed and the temporary offset (TEO) parameter

will be ignored.


BR Parameter BSS Parameter CELLRESH


unit: 2dB

range: 0..7

default: 2

Cell reselect hysteresis, indicates the value of the

receiver RF power level hysteresis required for cell

reselection (MS in idle mode) on the basis of the path

loss criterion C1.

cell reselect hysteresis (HYS)

object : BTS

Range : 0...14

Default : 4 dB

With this parameter you define the received RF

power level hysteresis for required cell reselection.

CREALL

object: BTS [OPTIONS]

range: ALLOWED,

NOTALLOWED

default: NOTALLOWED

Call re-establishment allowed, indicates whether the

MS may try to start a Call re-establishment

procedure. With a call re-establishment

procedure the MS tries to set up a new radio

connection to the BSS directly after a call drop.

call reestablishment allowed (RE)

object : BTS

Range : re-establishment is not allowed (N) (0), re-

establishment is allowed (Y) (1)

Default : re-establishment is not allowed (N) (0)

With this parameter you define whether call

reestablishment is allowed in the cell.


BR Parameter BSS Parameter CELLBARR

object: BTS [OPTIONS]

range: TRUE, FALSE

default: FALSE

Cell barred, If CELLBARR=TRUE this neighbour cell is set

to 'barred'

and thus cell reselection towards this cell is prevented for

ASCI mobiles. This prevention mechanism was introduced

especially for GSM-R networks with two completely

overlapping layers

cell barred (BAR)

object : BTS

Range : cell not barred (0), cell barred (1)

Default : cell not barred (0)

With this parameter you define whether MSs are

allowed to access the cell.

CBQ


range: 0= normal priority

1=low priority

default: 0

Cell bar qualify, is used to assign a priority to a cell which is

to be considered by the MS during the cell selection

decision. A suitable cell with low priority is only selected if no

suitable cell of normal priority can be found.

cell bar qualify (QUA)

object : BTS

Range : Cell barring cannot be overridden (N) (0), Cell

barring can be overridden (Y) (1)

Default : Cell barring cannot be overridden (N) (0)

With this parameter you define whether cell barring can

be overridden.


Power Control

Longer service time of battery Realization of power class Supported by default on UL

Reduced interference on DL/UL

Activation of DL power control powerCtrlEnabled (PENA) Y,N

Power control independent

for DL and UL for each call

Power Control Motivation

Static Power Reduction

BR Parameter BSS Parameter Mapping rule

PWRRED

object: TRX

range: 0..6 step 1 (2dB)

default: 0

txPwrMaxReduction - specifies the number of 2 dB steps the TX power should be reduced from the maximum transmit power, for tuning the cell coverage.

bsTxPwrMax

object: POC

range: 0..30 step 2 dB

default: 0

This parameter is used to identify the maximum transmission power of the BTS as an attenuation from the peak power of the TRX in GSM 800 and GSM 900 bands

bsTxPwrMax1x00

object: POC

range: 0..30 step 2 dB

default: 0

This parameter is used to identify the maximum transmission power of the BTS as an attenuation from the peak power of the TRX in GSM 1800 and GSM 1900 bands

Read value X according to band (X = bsTxPwrMax, or X = bsTxPwrMax1x00)

and set

PWRRED =

If X

Fixed increment step size

pcIncrStepSize (INC) 2,4,6 dB

Fixed decrement step size

pcRedStepSize (RED) 2,4 dB

Power Control Parameters Power Change Step Sizes

Desired power level can be achieved in 1 or 2 commands?

Fixed Step Size Variable Step Size

YES NO

Calculate Power Increment step to reach the desired PC threhsold

Power change triggered

BSS: Signal level thresholds pcUpperThresholdLevelDL/UL -110..-47 dBm pcLowerThresholdLevelDL/UL -110..-47 dBm

Signal quality thresholds pcUpperThresholdQualDL/UL 0..7 pcLowerThresholdQualDL/UL 0..7

Number of average samples Nx 1..32 Px 1..32

Lower Level Upper Level

Upper Quality

Lower Quality

No actionPower decreasedue to level

Power increasedue to quality

Power increasedue to levelor quality

Power increasedue to quality

Power decreasedue to levelor quality

Power increasedue to level

Power decreasedue to quality6 dB

Power increasedue to level

Exceeded threshold Action Reason pcUpperThresholdLevelDL BTS power decrease Signal level pcLowerThresholdLevelDL BTS power increase Signal level pcUpperThresholdLevelUL MS power decrease Signal level pcLowerThresholdLevelUL MS power increase Signal level pcUpperThresholdQualDL BTS power decrease Signal quality pcLowerThresholdQualDL BTS power increase Signal quality pcUpperThresholdQualUL MS power decrease Signal quality pcLowerThresholdQualUL MS power increase Signal quality

Power Control

Power Control

UL/DL configuration attributes merged: BR: enableMSPowercontrol, enableBSPowerControl -> BSS: pcControlEnabled


EBSPWRC

object: PWRC

range: CLASSIC, ADAPTIVE, DISABLED

default: ADAPTIVE Enable BS power control, determines whether the BTS dynamically adjusts its sending power according to the current radio conditions (on non-BCCH carriers).

pcControlEnabled

object: POC

range: power control is disabled (N) (0),

power control is enabled (Y) (1)

default: power control is enabled (Y) (1)

Power CTRL Enabled - with this parameter you indicate whether the BTS power control is enabled.

variable DL step size (VDLS)

object:BSC

Range: The variable downlink step size is not used (N) (0), The variable downlink step size is used (Y) (1)

Default: The variable downlink step size is not used (N) (0)

With this parameter you define whether the variable step size is used in the power control algorithm when the downlink transmission power is decreased.

if (pcControlEnabled == 0)

EBSPWRC = DISABLE;

else if (powerDecrQualFactor == 0)

EBSPWRC = CLASSIC

else EBSPWRC=ADAPTIVE


EMSPWRC

object: PWRC

range: CLASSIC, ADAPTIVE, DISABLED

default: ADAPTIVE Enable MS power control, determines whether the BTS instructs the MS to dynamically adjust its sending power according to the current radio conditions

pcControlEnabled

object: POC

range: power control is disabled (N) (0),

power control is enabled (Y) (1)

default: power control is enabled (Y) (1)

Power CTRL Enabled - with this parameter you indicate whether the BTS power control is enabled.

powerDecrQualFactor

object:POC

range: disabled (0), enabled (1)

default: enabled (1)

Power Decr Qual Factor - with this parameter you enable or disable the MS power decrease due to signal quality with the defined variable power change step size. This is done when the uplink signal level is lower than the optimum uplink RF signal level and the averaged signal quality equals the quality threshold. The parameter also has an effect on the size of the power decrease step.

if (pcControlEnabled == 0)

EBSPWRC = DISABLE;

else if (powerDecrQualFactor == 0)

EBSPWRC = CLASSIC

else EBSPWRC=ADAPTIVE

Power Control

BR Parameter BSS Parameter

LOWTLEVD

object: PWRC

range: 0..63

default: 25

Power control lower threshold level downlink, defines the lower threshold of the received signal level on the downlink for power increase

pcLowerThresholdsLevDLRxLevel

object: POC ;

range: -110..-47, step 1 ;

default: -85

PC lower thresholds lev DL Rx level - compares the averaged values of signal strength downlink measurements for triggering the power control process. This is the threshold level for a downlink power increase.

LOWTLEVU

object: PWRC

range: 0..63

default: 25

Power control lower threshold level uplink, defines the lower threshold of the received signal level on the uplink for power increase.

pcLowerThresholsLevULRxLevel

object: POC ;

range: -110..-47, step 1 ;

default: -85

PC lower thresholds lev UL Rx level - compare the averaged values of signal strength uplink measurements for triggering the power control process. This is the threshold level for a downlink power increase

Power Control


UPTLEVD

object: PWRC

range: 0..63

default: 36

Power control upper threshold level downlink, defines the upper threshold of the received signal level on the downlink for power reduction

pcUpperThresholdsLevDLRxLevel object: POC ;

range: -110..-47, step 1 ;

default: -70

PC upper thresholds lev DL Rx level - compares the averaged values of signal strength downlink measurements for triggering the power control process. This is the threshold level for a downlink power reduction.

UPTLEVU

object: PWRC

range: 0..63

default: 36

Power control upper threshold level uplink, defines the upper threshold of the received signal level on the uplink for power reduction

pcUpperThresholdsLevULRxLevel object: POC ;

range: -110..-47, step 1 ;

default: -70

PC upper thresholds lev DL Rx level - compares the averaged values of signal strength upnlink measurements for triggering the power control process. This is the threshold level for uplink power reduction.

Power Control


LOWTQUAD

object: PWRC

range: 0..20 [dB]

default: 12

Power control lower threshold quality downlink, defines the lower threshold of the received signal quality on the downlink for power increase.

PC Lower Thresholds Qual DL Rx Qual

object: POC

range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: 0.8%-1.6% (3)

PC lower thresholds qual DL Rx qual - compares the averaged values of signal quality downlink measurements for triggering the power control process. This is the quality threshold for a downlink power increase.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

LOWTQUAU

object: PWRC

range: 0..20 [dB]

default: 12

Power control lower threshold quality uplink, defines the lower threshold of the received signal quality on the uplink for power increase.

PC Lower Thresholds Qual UL Rx Qual

object: POC

range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: 0.8%-1.6% (3)

PC lower thresholds qual UL Rx qual - compares the averaged values of signal quality uplink measurements for triggering the power control process. This is the threshold level for a downlink power reduction. This is the quality threshold for a uplink power increase.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

Power Control


UPTQUAD

object: PWRC

range: 0..20 [dB]

default: 17

Power control upper threshold quality downlink, defines the upper threshold of the received signal quality on the downlink for power reduction.

PC Upper Thresholds Qual DL Rx Qual

object: POC

range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: < 0.2% (0)

PC upper thresholds qual DL Rx qual - compares the averaged values of signal quality downlink measurements for triggering the power control process. This is the quality threshold for a downlink power reduction.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

UPTQUAU

object: PWRC

range: 0..20 [dB]

default: 17

Power control upper threshold quality uplink, defines the upper threshold of the received signal quality on the uplink for power reduction.

PC Upper Thresholds Qual UL Rx Qual

object: POC

range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: < 0.2% (0)

PC upper thresholds qual UL Rx qual - compares the averaged values of signal quality uplink measurements for triggering the power control process. This is the quality threshold for a uplink power reduction.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

Power Control

Power Control BR Parameter BSS Parameter Mapping rule

PWREDSS

object: PWRC

range: DB2, DB4 [unit: 2dB]

default: DB2

Power reduction step size, defines the step size used when reducing the MS transmit power. In case of classic PWRC (EBSPWRC/EMSPWRC=CLASSIC), these step sizes are always applied for power increase. In case of adaptive PWRC they are applied only under special conditions.

pcRedStepSize

object: POC ;

Range: 2...4, step 2 ;

default: 2

Power red step size - defines the step size for reducing the transmission power of the mobile station.

On Abis

PWREDSS = pcRedStepSize + 1

In migration:

DB2 --> 2

DB4 --> 4

PWRINCSS

object: PWRC

range: DB2, DB4, DB6 [unit: 2dB]

default: DB6

Power increase step size, defines the step size used when increasing the MS transmit power. In case of classic PWRC (EBSPWRC/EMSPWRC=CLASSIC), these step sizes are always applied for power increase, in case of adaptive PWRC they are applied only under special conditions.

pcIncrStepSize

object: POC ;

Range: 2...6, step 2 ;

default: 4

Power incr step size - defines the step size for increasing the transmission power of the mobile station.

On Abis

PWRINCSS = pcIncrStepSize + 1

In migration:

DB2 --> 2

DB4 --> 4

PCMBSTXPRL

object: PWRC

range: 0..15 [2 dB]

default: 15

This parameter defines the maximum allowed dynamic power reduction.

bsTxPwrMin Range and step 0...30 dB, step 2 dB

default: 30 dB

BS Tx Pwr Min is used to identify the minimum transmission power of the BTS as an attenuation from the peak power of the TRX


PCONINT

object: PWRC

range: 0..31 [unit: 2 SACCH frames]

default: 2

Power control interval, defines the minimum time period (in units of 2 SACCH multiframes) between two consecutive power control decision in case of classic power control, i.e. the BS or MS power control decision will be suspended by the time defined by PCONINT when a new power level was set.

pcControlInterval

Object: POC

Range: 0..31

Default: 2

Power Control interval - defines the minimum interval between the changes in the radio frequency power level.

Power Control


Handover control


PBGTHO

object: HAND

range: TRUE, FALSE

default: TRUE

Power budget handover enabled - this attribute indicates whether handover due to power budget is enabled or disabled.

enablePowerBudgetHo

object: HOC

range: handover is disabled (N) (0), handover is enabled (Y)(1)

default: enabled (Y) (1)

Enable Power Budget Handover - with this parameter you indicate whether the BTS power budget handover control is enabled.

HOM

object: ADJC

range: 0..126 (0 = -63dB; 126 = +63dB)

default: 69 (= 6dB)

Handover margin- this parameter defines a threshold for the power budget handover. The handover margin is used for the power budget handover decision process: a power budget handover ('better cell'handover) is only triggered if the power budget of a specific neighbour cell exceeds the handover margin set for the ADJC object representing this cell.

hoMarginPbgt

object: ADCE

Range and step -24...63 dB, step 1 dB

default: 6 dB

With this parameter you define a threshold in the power budget process. The handover margin prevents repeated handover between adjacent cells.

hoMargin = (hoMarginPbgt) + 63

Handover control Better cell HO (PBGT)


HOAVPWRB

object: HAND

range: 1..31 [SACCH multiframe]

default: 8

Handover averaging window for power budget handover - this attribute defines the averaging window size, in SACCH periods, used for power budget evaluation. It is also used in other types of handovers for averaging of neighbour cell measurements

hoPeriodPbgt

object HOC

Range and step 0...63 SACCH periods, step 1 SACCH periods

Default: 6

Handover Period Power Budget - with this parameter you define the interval between power budget handover threshold comparisons.

map:

- 0 --> 1

- (values > 31) --> 31

- preserves values in range [1 to 31]

Handover control Better cell HO (PBGT)

Handover control Hierarchical Cells Structure


HIERC

object: HAND

range: TRUE, FALSE

default: FALSE

Hierarchical Cell Handover indicates whether the ranking of the target cells based on the priority layer is enabled or disabled.

enableUmbrellaHo

object: HOC

range and step: 0 - disabled, 1 enabled

Default: 0

With this parameter you indicate whether the BTS umbrella handover is enabled.

When Umbrella HO enabled concurrently with power budget HO, BSC HO algorithm takes layer definition of adjacent cell into account. So Enable Umbrella Handover can be used.

PLNC

object: ADJC

range: 0..15

default: 0

priority layer of the neighbour cell (0 highest priority; 15 lowest priority)

hoPriorityLevel

object: ADCE

Range and step: 0...7, step 1

default: 3

With this parameter you define the priority level for an adjacent cell.

14-((hoPriorityLevel) * 2)

BR parameters mapped to BSS:

Handover control Hierarchical Cells Structure


Mapping rule

PL

object: HAND

range: 0..16

default: 0 Priority layer - if hierarchical cell handover is enabled (HIERC=TRUE) this parameter determines the priority layer of the own cell. This priority is only evaluated for the Power Budget handover decision and the traffic handover decision. The priority layers of the neighbour cells are administered in the ADJC object (PPLNC parameter).

hcsPriorityClass

object: BTS


default: 0

With this parameter you define the HCS (hierarchical cell structures) priority for the cells. 0 is the lowest and 7 is the highest priority.

14-hcsPriorityClass * 2

PPLNC

object: ADJC

range: 0..15

default: 0

Penalty priority layer of neighbour cell - this parameter is relevant for speed sensitive handover; it determines the temporary priority layer of the neighbour cell.

hcsPriorityClass

object: ADCE


default: 0

With this parameter you define the HCS (hierarchical cell structures) priority for the cells. 0 is the lowest and 7 is the highest priority. In the adjacent cell creation, if this parameter is not given and the SEG and the adjacent cell are in the same BSS, the value of this parameter is copied from the SEG.

14-hcsPriorityClass * 2

BR parameters mapped to BSS:

Handover control Level HO


ELEVHOM

object: HAND

range: TRUE, FALSE

default: FALSE Enable level handover margin parameter

indicates if level handover margin (RXLEV_NCELL(n) > RXLEV_DL + LHOMARGIN) is enabled or disabled.

enableHoMarginLevQual

object: ADCE

Range and step: not used (N) (0), used (Y) (1)

default: used (Y) (1)

With this parameter you define whether the handover margins for signal level and quality will be taken into account in the handover decision algorithm.

Set ELEVHOM to TRUE if at least 1 of the up to 32 ADCEs has enableHoMarginLevQual set to 1

LEVHOM

object: ADJC

range: 0..126 (0 = -63dB; 126 = +63dB)

default: 69 (= 6dB)

Level handover margin parameter represents a threshold to guarantee a handover to a target cell with a higher level than the serving cell, without altering the behaviour of the other handover types

hoMarginLev*

object: ADCE

Range and step: -24...24 dB, step 1 dB

default: 3 dB

With this parameter you define a threshold for a handover caused by signal level.

LEVHOM = (hoMarginLev) + 63

*The default is not the same in BR and BSS!



HOLTHLVDL

object: HAND

range: 1..63

default: 10 Handover lower threshold level downlink - defines the receive signal strength threshold on downlink for intercell handover decision.

1 = -110dBm

2 = -109dBm

...

hoTLDlRxLevel

object: HOC

Range and step: -110...-47 dBm, step 1 dBm

default: -95 dBm

The parameter compares the averaged values of signal strength downlink measurements for triggering the handover process.

HOLTHLVUL

object: HAND

range: 1..63

default: 8 Handover lower threshold level uplink - defines the receive signal strength threshold on uplink for intercell handover decision.

1 = -110dBm

2 = -109dBm

...

hoTLUlRxLevel

object: HOC

Range and step: -110...-47 dBm, step 1 dBm

default: -95 dBm

The parameter compares the averaged values of signal strength uplink measurements for triggering the handover process.


ENAQUALEVHOM

object: ADJC

range: TRUE, FALSE

default: FALSE

Enable level handover margin for quality handover - this attribute indicates whether level handover margin for Quality Handover is enabled or disabled. In addition to normal handover margin only cells are taken into account for handover decision which DL power level exeeds the DL power level of the serving cell by a configurable margin (QUALLEVHOM)

enableHoMarginLevQual

object : ADCE

Range and step: not used (N) (0), used (Y) (1)

Default : used (Y) (1)

Enable HO Margin Lev Qual - with this parameter you define whether the handover margins for signal level and quality will be taken into account in the handover decision algorithm

Set ENAQUALEVHOM to TRUE if at leats 1 of the up to 32 ADCEs has enableHoMarginLevQual set to 1

QUALLEVHOM

object: ADJC

range: 0..126 (0 = -63dB; 126 = +63dB)

default: 69 (= 6dB)

Level handover margin for quality handover - this parameter defines the margin by which the DL power level of a target cell shall exceed the DL power level of the serving cell to be entered into the target cell list in case of a quality HO

hoMarginQual*

object: ADCE

Range and step: -24...24 dB, step 1 dB

default: 0 dB

With this parameter you define a threshold for a handover caused by signal quality.

QUALLEVHOM = (hoMarginQual) + 63

Handover control Quality and Interference HO

*The default is not the same in BR and BSS!



HOLTHQUDL object: HAND

range: 0..20 dB

default: 9 Handover lower threshold quality downlink - defines the receive signal quality threshold on downlink for intercell handover decision.

hoTQDlRxQual

object: HOC

Range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: 1.6% - 3.2% (4)

The parameter compares the averaged values of signal quality downlink measurements for triggering the handover process.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

HOLTHQUUL object: HAND

range: 0..20 dB

default: 9 Handover lower threshold quality uplink - defines the receive signal quality threshold on uplink for intercell handover decision.

hoTQUlRxQual

object: HOC

Range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: 1.6% - 3.2% (4)

The parameter compares the averaged values of signal quality uplink measurements for triggering the handover process.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

Handover control Level vs Quality

Handover Control Intracell Handover


INTRACH

object: HAND [BASICS]

range: TRUE, FALSE

default: TRUE

Internal intra-cell Handover enabled, determines whether intra-cell

handovers due to quality and due to compression/decompression

(parameter EADVCMPDCMHO, see above) are allowed in this BTS

enable intracell handover interference UL (EIC)

Object : HOC

Range : handover control is disabled (N) (0), handover control is enabled

(Y) (1)

Default : handover control is disabled (N) (0)

With this parameter you indicate whether an intracell handover caused by

uplink interference is enabled. The parameter does not affect handovers

between normal and extended areas.

enable intracell handover interference DL (EIH)

Object : HOC

Range : handover control is disabled (N) (0), handover control is enabled

(Y) (1)

Default value handover control is disabled (N) (0)

With this parameter you indicate whether an intracell handover caused by

downlink interference is enabled. The parameter does not affect

handovers between normal and extended areas.

IERCHOSDCCH


range: TRUE, FALSE

default: FALSE

Inter-cell handover for SDCCH, this parameter determines whether

inter-cell SDCCH-SDCCH handover is enabled or not.

enable SDCCH handover (ESD)

object : HOC

Range : handover is disabled (N) (0), handover is enabled (Y) (1)

Default : handover is disabled (N) (0)

With this parameter you indicate whether the BTS SDCCH handover is

enabled.

IRACHOSDCCH


range: TRUE, FALSE

default: FALSE

Intra-cell handover for SDCCH, this parameter determines whether

intra-cell handover due to quality is enabled for SDCCH-

SDCCHhandovers

or not.


HOTDLINT

object: HAND

range: 0..63

default: 32 Handover threshold level downlink intra - this attribute defines the receive signal strength threshold on downlink for intracell handover decision.

hoThresholdsInterferenceDlRxLevel

object: HOC

Range and step -110...-47 dBm, step 1 dBm

Default value -85 dBm

Threshold interference downlink Rx level - the parameters compare the averaged values of interference downlink measurements for triggering the handover process.

HOTULINT

object: HAND

range: 0..63

default: 32 Handover threshold level uplink intra - this attribute defines the receive signal strength threshold on uplink for intracell handover decision.

hoThresholdsInterferenceUlRxLevel

object: HOC

Range and step -110...-47 dBm, step 1 dBm

Default value -85 dBm

threshold interference uplink Rx level - the parameters compare the averaged values of interference uplink measurements for triggering the handover process.




HOAVLEV

object: HAND

format: averaging period - DTX weighting factor

range: 1..31 (averaging period) - 1..3 (DTX weight. factor)

unit: 1 SACCH multiframe=480ms

default: 4-2

Handover averaging parameters for level handover - defines two averaging parameters for the uplink and downlink signal strength measurements, used for handover decision.

hoAveragingLevDLWeighting

object: HOC ; Range and step 1...3, step 1 ;default: 1

Level Downlink Weighting defines the weighting factor for calculating the averaged values from the signal strength downlink measurements for the handover control. This parameter indicates the weighting factor for measurements that have not used Discontinuous Transmission (DTX).

hoAveragingLevDlWindowSize object: HOC; Range and step 1...32 SACCH periods, step 1 SACCH periods; default: 6

The parameters calculate averaged values from signal strength downlink measurements. The Level Downlink Window Size represents the averaging window size in SACCH periods.

hoAveragingLevUlWeighting object: HOC; Range and step 1...3, step 1; Default value 1

With Level Uplink Weighting parameter you define the weighting factor for calculating the averaged values from the signal strength uplink measurements for the handover control. This parameter indicates the weighting factor for measurements that have not used Discontinuous Transmission (DTX).

hoAveragingLevUlWindowSize

object: HOC; Range and step 1...32 SACCH periods, step 1 SACCH periods; default: 6

The parameters calculate averaged values from signal strength uplink measurements. The Level Uplink Window Size represents the averaging window size in SACCH periods.

(averaging period) = min (

Level Downlink Window Size,

Level Uplink Window Size)

(DTX weight. factor) = min (

Level Downlink Weighting,

Level Uplink Weighting)


HOAVQUAL

object: HAND

format: averaging period - DTX weighting factor

range: 1..31 (averaging period) - 1..3 (DTX weight. factor)

unit: 1 SACCH multiframe=480ms

default: 3-2

Handover averaging parameters for quality handover - defines two averaging parameters for the uplink and downlink signal quality measurements, used for handover decision.

hoAveragingQualDlWeighting

object: HOC ; Range and step 1...3, step 1 ;default: 1

Quality Downlink Weighting defines the weighting factor for calculating the averaged values from the signal quality downlink measurements for the handover control. This parameter indicates the weighting factor for measurements that have not used Discontinuous Transmission (DTX).

hoAvaragingQualDlWindowSize object: HOC; Range and step 1...32 SACCH periods, step 1 SACCH periods; default: 6

The parameters calculate averaged values from signal quality downlink measurements. The Quality Downlink Window Size represents the averaging window size in SACCH periods.

hoAveragingQualUlWeighting object: HOC; Range and step 1...3, step 1; Default value 1

With Quality Uplink Weighting parameter you define the weighting factor for calculating the averaged values from the signal quality uplink measurements for the handover control. This parameter indicates the weighting factor for measurements that have not used Discontinuous Transmission (DTX).

hoAveragingQualUlWindowSize

object: HOC; Range and step 1...32 SACCH periods, step 1 SACCH periods; default: 6

The parameters calculate averaged values from signal quality uplink measurements. The Quality Uplink Window Size represents the averaging window size in SACCH periods.

(averaging period) = min (

Quality Downlink Window Size,

Quality Uplink Window Size)

(DTX weight. factor) = min (

Quality Downlink Weighting,

Quality Uplink Weighting)


AMR Packing / unpacking HO

Channel Mode Adaptation is an HO algorithm that aims at select the correct

channel rate (FR or HR).

The selection of the channel rate depends on 2 main factors: load and

quality

compression/decompression in BR is the same as packing / unpacking in BSS

In BSC3i AMR compression decompression

HO is called packing and unpacking

respectively

For decompression/unpacking load is not considered (quality only)

LoadLoadGood Good

QualityQuality

FRFR HRHR

HRHRFRFRBad Bad

QualityQuality

packingpacking

unpackingunpacking

AMR Packing / unpacking HO Example


HOTHCUL

object: HAND

range: 0..20 dB

default: 18

Handover threshold compression uplink - this attribute is used for detecting a compression Handover "AMR Fullrate to Halfrate" and defines the quality threshold for the uplink

amrHoFrInHoThrDlRxQual

object: BTS

Range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: < 0.2% (0)

Intra HO threshold Rx qual AMR FR - with this parameter you define the threshold level of the signal quality downlink and uplink measurements for triggering the intra-cell handover process for an AMR FR call in order to switch it to an AMR HR call.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

HOTHCDL object: HAND

range: 0..20 dB

default: 18 Handover threshold compression downlink - this attribute is used for detecting a compression Handover "AMR Fullrate to Halfrate" and defines the quality threshold for the downlink

amrHoFrInHoThrDlRxQual

object: BTS

Range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: < 0.2% (0)

Intra HO threshold Rx qual AMR FR - with this parameter you define the threshold level of the signal quality downlink and uplink measurements for triggering the intra-cell handover process for an AMR FR call in order to switch it to an AMR HR call.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20



HOTHDUL

object: HAND

range: 0..20 dB

default: 13

Handover threshold decompression uplink -this attribute is used for detecting a decompression Handover "AMR Halfrate to Fullrate" and defines the quality threshold for the uplink

amrHoHrInHoThrDlRxQual

object: BTS

Range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: 1.6% - 3.2% (4) Intra HO threshold Rx qual AMR HR - with this parameter you define the threshold level of the signal quality downlink and uplink measurements for triggering the intra-cell handover process for an AMR HR call in order to switch it to an AMR FR call.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20

HOTHDDL object: HAND

range: 0..20 dB

default: 13 Handover threshold decompression downlink -this attribute is used for detecting a decompression Handover "AMR Halfrate to Fullrate" and defines the quality threshold for the downlink

amrHoHrInHoThrDlRxQual

object: BTS

Range: < 0.2% (0), 0.2% - 0.4% (1), 0.4% - 0.8% (2), 0.8% -1.6% (3), 1.6% - 3.2% (4), 3.2% - 6.4% (5), 6.4% -12.8% (6), > 12.8% (7)

default: 1.6% - 3.2% (4) Intra HO threshold Rx qual AMR HR - with this parameter you define the threshold level of the signal quality downlink and uplink measurements for triggering the intra-cell handover process for an AMR HR call in order to switch it to an AMR FR call.

RXQUAL : C/I

6,88-7,00 : 1 6,76-6,87 : 2 6,38-6,75 : 4

6,13-6,37 : 5 5,88-6,12 : 6 5,63-5,87 : 7

5,13-5,62 : 8 4,88-5,12 : 9 4,63-4,87 : 10

4,13-4,62 : 11 3,88-4,12 : 12 3,38-3,87 : 13

2,88-3,37 : 14 2,63-2,87 : 15 2,13-2,62 : 16

1,63-2,12 : 17 1,13-1,62 : 18 0,38-1,12 : 19

0,00-0,37 : 20



HOTHCMPLVDL

object: HAND

range: 0..63; unit: 1 dBm

default: NULL

Handover threshold for compression in downlink - defines the downlink level condition for triggering a compression HO.

intraHoLoRxLevLimAmrHr

object: HOC ;

range and step -110...-47, step 1 dBm ; default: -100

Intra HO Lower Rx Level Limit AMR HR - defines the limit for averaged uplink and downlink signal level. If averaged uplink or downlink signal level is worse than this parameter then the quality based intra cell handovers are not allowed.

HOTHCMPLVUL

object: HAND

range: 0..63; unit: 1 dBm

default: NULL

Handover threshold for compression uplink

defines the downlink level condition for triggering a compression handover.



Half Rate Setting

Upper limit for free FR TCHs

- btsSpLoadDepTCHRate BTS level - btsLoadDepTChRate BSC level

Lower limit for free FR TCHs

- btsSpLoadDepTCHRate BTS level - btsLoadDepTChRate BSC level

Allocation

of FR

TCHs

Allocation

of HR

TCHs

Allocation

of FR

TCHs

Free FR TCHs based on ratio of

available to working

FR TCHs

Process is disabled by setting

lower limit > upper

limit

Enabling load analysis at BTS

level automatically

disables it at a BSC

level

To disable at BTS level must be

disabled at both

BTS and BSC level

Half Rate HR - TCH Allocation based on Cell Load


Handover Strategy

More than one handover criterion fulfilled -> process of higher priority performed

Handover and power control criteria fulfilled -> handover performed

1) Interference (uplink or downlink)

2) Intra-segment inter-band because of downlink level (from higher to lower frequency band)

3) Uplink quality

4) Downlink quality

5) AMR unpacking (uplink level and also uplink unpacking quality triggers)

6) Uplink level

7) AMR unpacking (downlink level and also downlink unpacking quality triggers)

8) Downlink level

9) Coverage based inter-system handover to WCDMA RAN

10) IMSI-based inter-system handover to WCDMA RAN

11) IMSI-based handover

12) DTM-based handover to WCDMA RAN

13) Inter-system handover to WCDMA RAN

14) MS-BS distance (maximum or minimum)

15) Turn-around-corner MS

16) Rapid field drop

17) Slow/fast-moving MS

18) Umbrella

19) Power budget

20) DTM-based handover to a GSM DTM cell

21) BSC-initiated TRHO

22) IUO

23) Intra-segment HO based on load

24) AMR packing because of good uplink and downlink quality

25) AMR unpacking because of bad uplink or downlink quality

26) PC because of lower quality thresholds (uplink and downlink)

27) PC because of lower level thresholds (uplink and downlink)

28) PC because of upper quality thresholds (uplink and downlink)

29) PC because of upper level thresholds (uplink and downlink)

Handover Strategy (Priorities)

Cell a b c

Overloaded? N/Y N N

Priority 4 3 3

hoLoadFactor 2 1 1

Corrected priority 4/2 3 3

Rx level -75 -80 -83

No cell overloaded -> priorities 4,3,3 -> cell list a,b,c

A overloaded -> priorities 2,3,3 -> cell list b,c,a

Adjacent Cell Load Threshold Can be checked only for cells belonging to the same BSC as the serving one btsLoadThreshold (BLT) 0..100 % Adjacent Cell Priority hoPriorityLevel (PRI) 0..7 Overloaded Cell -> Reduction of Priority hoLoadFactor (OF) 0..7 Ranking (not for imperative and traffic reason handover) 1) Corrected priority 2) Cells with same priority -> RX level

Handover Strategy Standard Target Cell Ranking

AV_RXLEV_NCELL(n) > rxLevMinCell(n) + Max (0, msTxPwrMax(n) P) P depends on MS power class

1a

Any kind of handover (except umbrella)

AV_RXLEV_NCELL(n) > hoLevelUmbrella(n) 1b

Umbrella handover

Minimum allowed signal level for target cell rxLevMinCell (SL) -110..-47 dBm any handover (except umbrella) hoLevelUmbrella (AUCL) -110..-47 dBm umbrella handover

Handover Strategy Decision due to Rx Level

PBGT > hoMarginLev/Qual(n)

PBGT = (AV_RXLEV_NCELL(n) - AV_RXLEV_DL_HO) -

(btsTxPwrMax - BTS_TXPWR)

2b

PBGT > hoMarginPBGT(n)

PBGT = (msTxPwrMax - msTxPwrMax(n))

(AV_RXLEV_DL_HO - AV_RXLEV_NCELL(n)) -

(btsTxPwrMax - BTS_TXPWR)

2a

General case

Handover due to RX level, RX quality, distance and umbrella handover

Power budget margin to prevent repeated handovers between adjacent cells hoMarginPBGT (PMRG) -24..63 dB general case RX level and RX quality margins to prevent repeated handovers between adjacent cells hoMarginQual (QMRG) -24..24 dB handover due to signal quality hoMarginLevel (LMRG) -24..24 dB handover due to signal level EnableHOMarginLevQual (MRGS) Y/N required to enable margins

Handover Strategy Decision due to Power Budget

HO STRATEGY within BSS BTS Family

HO Strategy BSS BTS Family (Ultrasite, FlexiBTS, FMR)

HO Strategy Existing BR.90 (Non Gemini) to BSS BTS Family

LEGEND HO REASON PL Source PLNC Target HOM

Better Cell/PBGT, RADIO REASONPL Source =

PLNC Target

PL Source =

PLNC Target69 / Before

Better Cell/PBGT, RADIO REASON 12 10 57 / Before

Better Cell/PBGT, RADIO REASON 12 4 / 6 57 / Before

RADIO REASON 10 12 69 / Before


RADIO REASON 4 / 6 12 69 / Before


HO Strategy BSS BTS Family to Existing BR.90 (Non Gemini)

63

HO REASON

PBGT & RADIO REASON

(LEV/QUAL)

RADIO REASON

(LEV/QUAL)

Umbrella due to FMT,

RADIO REASON (LEV/QUAL)

Umbrella due to FMT (SMM),

RADIO REASON (LEV/QUAL)

63

UPPER

LOWER

LOWER

0

SAME

1 25

40 35

ACL AUCLLEGEND FMT

0

HO STRATEGY within GEMINI

HO Strategy Gemini

HO Strategy Existing BR.90 to Gemini

LEGEND HO REASON PL Source PLNC Target HOM

Better Cell/PBGT, RADIO REASONPL Source =

PLNC Target

PL Source =

PLNC Target69 / Before

Better Cell/PBGT, RADIO REASON 12 10 57 / Before


RADIO REASON 10 12 69 / Before




HO Strategy Gemini to Existing BR.90

LEGENDhoPriorityLevel

TargetPBGT

HCS Source =

PRIO Target6 / Before

2 -6 / Before

5/4 -6 / Before

5/4

HO REASON HCS Source

Better Cell/PBGT, RADIO REASONHCS Source =

PRIO Target

Better Cell/PBGT, RADIO REASON 1

6 / Before


RADIO REASON 2


1 6 / Before

RADIO REASON 5/4 2 6 / Before

-6 / Before

RADIO REASON 5/4 1

Thank You!