ZGB-02!02!001 Basic Handover Feature Guide ZXG10-IBSC (V12.2.0)20130314

ZGB-02-02-01 Basic

Handover

Feature Guide

ZGB-02-02-01 Basic Handover

ZTE Confidential Proprietary 1


Version Date Author Reviewer Notes

V1.0 2012/03/12 Huang Anjie

GU Commercial

System Supporting

Dept.

New

© 2014 ZTE Corporation. All rights reserved.

ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used

without the prior written permission of ZTE.

Due to update and improvement of ZTE products and technologies, information in this document is subjected to

change without notice.


2 ZTE Confidential Proprietary

TABLE OF CONTENTS

1 Feature Attribute ............................................................................................... 6

2 Overview ............................................................................................................ 7

2.1 Feature Introduction ............................................................................................. 7

2.2 License Control .................................................................................................... 7

2.3 Correlation with Other Features ........................................................................... 7

3 Technical Description ....................................................................................... 8

3.1 Handover Parameter Configuration ...................................................................... 9

3.2 Measurement Report Processing ....................................................................... 10

3.3 Handover Decision ............................................................................................. 12

3.4 Target Cell Selection .......................................................................................... 13

3.4.1 Intra-cell Handover ............................................................................................. 13

3.4.2 Inter-cell handover ............................................................................................. 13

3.5 Sorting Target Cell ............................................................................................. 16

4 Parameters and Configurations ..................................................................... 17

4.1 Parameter List ................................................................................................... 17

4.2 Parameter Configuration .................................................................................... 18

5 Related Counters and Alarms ........................................................................ 26

5.1 Related Counters ............................................................................................... 26

5.2 Related Alarms .................................................................................................. 52

6 Engineering Guide .......................................................................................... 53

6.1 Application Scenario .......................................................................................... 53

6.2 Configuration Description ................................................................................... 53

6.2.1 BSC Intra-cell Handover .................................................................................... 53

6.2.2 BSC Inter-cell Handover .................................................................................... 55

6.2.3 MSC Intra-cell Handover .................................................................................... 57

6.2.4 MSC Intra-cell Handover .................................................................................... 60

6.3 Feature Validation .............................................................................................. 60

6.4 Feature Turn off ................................................................................................. 61

6.5 Network Impact .................................................................................................. 63

7 Abbreviation .................................................................................................... 64

8 Reference Document ....................................................................................... 64





FIGURES

Figure 3-1 Order of Handover Implementation .................................................................... 8

Figure 6-1 BSC Intra-cell Handover Parameters 1 .............................................................53



Figure 6-4 BSC Inter-cell Handover Parameters 1 .............................................................55



Figure 6-7 MSC Intra-cell Handover Parameters 1.............................................................57



Figure 6-10 MSC Intra-cell Handover Parameters 4...........................................................59

Figure 6-11 Basic Handover Turn Off Parameters 1 ..........................................................62



TABLES

Table 3-1 Parameter List of Calculating the Margin of Power Budget ................................12

Table 3-2 Description of Handover Cell Judgment Parameters ..........................................14

Table 3-3 Target Cell Selection Policy due to Different Handover Reasons .......................15

Table 4-1 Parameter List ...................................................................................................17

Table 4-2 Configuration rule of BSC intracell handover enable ..........................................18

Table 4-3 Configuration rule of Allow intra-Cell handover attempt due to uplink interference

(Low Speed) .........................................................................................................................18

Table 4-4 Configuration rule of Allow intra-Cell handover attempt due to downlink

interference (Low Speed) .....................................................................................................18

Table 4-5 Configuration rule of Uplink interference quality offset........................................19



Table 4-6 Configuration rule of Uplink interference level offset ..........................................19

Table 4-7 Configuration rule of Downlink interference quality offset ...................................19

Table 4-8 Configuration rule of Downlink interference level offset ......................................20

Table 4-9 Configuration rule of Uplink receive level Threshold ...........................................20

Table 4-10 Configuration rule of Downlink receive level Threshold ....................................20

Table 4-11 Configuration rule of Uplink receive quality Threshold ......................................21

Table 4-12 Configuration rule of Downlink receive quality Threshold .................................21

Table 4-13 Configuration rule of Uplink receive level Value P ............................................22

Table 4-14 Configuration rule of Uplink receive level Value N ............................................22

Table 4-15 Configuration rule of Downlink receive level Value P........................................22

Table 4-16 Configuration rule of Downlink receive level Value N .......................................23

Table 4-17 Configuration rule of Uplink receive quality Value P .........................................23

Table 4-18 Configuration rule of Uplink receive quality Value N .........................................23

Table 4-19 Configuration rule of Downlink receive quality Value P .....................................24

Table 4-20 Configuration rule of Downlink receive quality Value N ....................................24

Table 4-21 Configuration rule of Allow quality handover in uplink(Low Speed) ...................24

Table 4-22 Configuration rule of Allow level handover in uplink(Low Speed)......................25

Table 4-23 Configuration rule of Allow quality handover in downlink(Low Speed) ..............25

Table 4-24 Configuration rule of Allow level handover in downlink(Low Speed) .................25

Table 5-1 Counters list .......................................................................................................26



1 Feature Attribute

BSC Version: [ZXG10-iBSC GSM (V6.30.102)]

BTS Version: [Not related with BTS hardware platform]

Property: [Basic]

Related Network Element:

NE Name Related or Not Special Requirements

MS √

BTS √

BSC √

MSC √

MGW -

SGSN -

GGSN -

HLR -

Dependent Function: [ZGO-02-02-001 Handover between Macro- and Micro-cells,

ZGO-02-02-002 Dynamic Handover Priority Algorithm, ZGO-02-02-003 Directed-Shift

Handover, ZGO-02-02-007 Traffic Based Handover, ZGO-05-02-008 Multi-layer Cell

Structure, ZGO-05-02-009 Concentric Circle Technology, ZGO-04-02-005 Co-BCCH]

Exclusive Function: [None]

Note: [None]



2 Overview

2.1 Feature Introduction

MS continuously reports measurement report during conversation. BSC determines if

handover should be made based on the report, updates the candidate cell list and does

handover based on this list.

There are the following handover types:

Intra-cell handover: handover between similar channels in a cell;

Intra-BSC inter-cell handover: handover between similar channels in different cells that

are controlled by a BSC.

Intra-MSC inter-BSC handover: handover between similar channels in different cells that

are controlled by different BSCs under a MSC.

Inter-MSC handover: handover between similar channels in different cells that are

controlled by different MSCs.

ZXUR9000 can activate various kinds of handover algorithms based on actual network

conditions. If all the algorithms are activated, they will be used in a proper order. Some

handover parameters are set at cell level and some are set for each adjacent cell.

2.2 License Control

None license control for this feature in UR12 Release.

2.3 Correlation with Other Features

This feature is functionally related to the following features:

ZGO-02-02-001 Handover between Macro- and Micro-cells



ZGO-02-02-002 Dynamic Handover Priority Algorithm

ZGO-02-02-003 Directed-Shift Handover

ZGO-02-02-007 Traffic Based Handover

ZGO-05-02-008 Multi-layer Cell Structure

ZGO-05-02-009 Concentric Circle Technology

ZGO-04-02-005 Co-BCCH

Features like Handover between Macro- and Micro-cells, Directed-Shift Handover and

Traffic Based Handover can be categorized into the handover types described in this

feature.

The relation between this feature and Dynamic Priority: target cell of this feature is sorted

by dynamic priority method. There are two methods to sort the target cells, dynamic

priority and power budget. First sort the target cells based on dynamic priority, and then

sort them based on power budget if dynamic priority is the same.

The relation between this feature and Multi-layer Cell Structure: the cell layer structure is

used in cell layer configuration and target cell selection.

The relation between this feature and these features Concentric Circle Technology and

Co-BCCH: Intra-cell handover of this feature includes sub-cell handover, and sub-cell

handover will happen if Concentric Circle Technology or Co-BCCH feature is activated.

3 Technical Description

Figure 3-1 shows the order of handover implementation, including handover parameter

configuration, measurement report processing, handover decision, target cell selection,

target cell sorting, failure penalty policy, and handover execution. Handover execution is

not described in this document.

Figure 3-1 Order of Handover Implementation



Start

Measurement report

processing

Handover

decision

Target cell

selection

Target cell sorting

End

Layer selection

policy

Handover

decision criterion

Priority of handover

algorithm

Handover decision based

on handover threshold

Priority sortingPower budget margin

sorting

Handover Parameter

Configuration

Failure penalty

policy

Save and

average

Handover

execution

3.1 Handover Parameter Configuration

In normal network plan, Cell structure is divided into four layers: umbrella cell, macro-cell,

micro-ell and pico-cell. For detailed description of cell layer setting, please refer to

“ZGO-05-02-008 Multi-layer Cell Structure" feature description.

For the parameter configuration of various handover algorithms, please refer to the

feature description of related algorithms: “ZGO-02-02-001 Handover between Macro-

and Micro-cells”,”ZGO-02-02-002 Dynamic Handover Priority Algorithm”,

“ZGO-02-02-003 Directed-Shift Handover” , ”ZGO-02-02-007 Traffic Based Handover”,

“ZGO-05-02-008 Multi-layer Cell Structure”, “ZGO-05-02-009 Concentric Circle

Technology” and “ZGO-04-02-005 Co-BCCH”.



3.2 Measurement Report Processing

Measurement report is the original data for handover decision. ZTE GSM system uses

slide window mechanism and weighted average method.

To avoid the adverse influence on burst measurement value caused by complicated

radio transmission environment, we use a series of measurement data to do handover

decision, namely slide window mechanism. Slide window mechanism means that during

average calculation process, the oldest data is discarded and newest data is added. So

the number of data to be averaged keeps unchanged. The number of data is also the

size of slide window. The average calculation is done only if the number of accumulated

data is more than slide window size.

The reason of using weighted average is that DTX (Discontinuous Transmission) may be

used on uplink/downlink. DTX mode means that the system does not transmit signals

during the speech intermission of subscriber conversation. For non-DTX mode, it is more

accurate since it is the average value of measurement results of all timeslots. For DTX

mode, it is less accurate since it is the average value of measurement results of some

timeslots. During the averaging process, give a weight more than 1 for the data with

higher reliability. This is the meaning of weighted average.

The measurement report processing has following features:

Do preprocessing only after the number of measurement reports reaches the size of

slide window. By default, the size of slide window is 4.

If DTX is enabled, the accuracy of level and quality values in measurement report may

be compromised. So the weight of measurement report with DTX is different from that

without DTX. The weight of measurement report is 1 if DTX is enabled. The weight of

measurement report can be set to (1, 2, 3) if DTX is disabled, 2 by default.

ZeroAllowed is a parameter defined as the maximum number that measurement reports

can be lost at most. If the number of lost measurement reports exceeds ZeroAllowed,

current calculation is skipped and the slide window begins the next collection of

measurement reports. For the lost measurement report, it is considered as 0 (that is,

-110dBm), and the value is not used in average calculation. For example:



If the (K-1)th measurement report is lost and the average window size is 8, average = 1/7

(RXLEV_NCELL(K)+0+RXLEV_NCELL(K-2)+....+RXLEV_NCELL(K-7)).

Current power in measurement report will be used to calculate the subsequent PBGT.

If the downlink data within this measurement period is valid and the average of downlink

level is provided, PBGT value of this adjacent cell can be calculated based on formula (1)

and (2):

Pa PWR_C_D] L[AvRxLev_D-ell(n)AvRxLev_NCPBGT(n) (1)

ity(n))MS_Capabilwr_Max(n),Min(MS_TxP-ity)MS_Capabilwr_Max,Min(MS_TxPPa

BS_TxPwr-axBS_TxPwr_M PWR_C_D

(2)

For margin of power budget, please refer to formula (3):

0)(_)()( nMARGINHOnPBGTnPBGT (3)

Table 3-1 describes the parameters in formula (1), (2), and (3).



Table 3-1 Parameter List of Calculating the Margin of Power Budget

Parameter Meaning

AvRxLev_NCell (n) Average of downlink level in adjacent cell and received

by MS

AvRxLev_DL Average of downlink level in serving cell for MS

BS_TxPwr_Max Max power of base station

BS_TxPwr Actual power of base station

MS_TxPwr_Max Max power of serving cell for MS

MS_TxPwr_Max(n) Max power of adjacent cell for MS

MS_Capability Power capability of serving cell for MS

MS_Capability (n) Power capability of adjacent cell for MS

HO_MARGIN(n) Power budget threshold

3.3 Handover Decision

BSC judges if the handover conditions are met in order. Once a handover condition is

met, the handover is executed. In general, the priority of intra-cell handover algorithm is

higher than that of inter-cell handover algorithm. Intra-cell handover algorithm includes

subcell handover and uplink/downlink interference handover. Inter-cell handover

algorithm includes uplink/downlink quality handover, uplink/downlink level handover,

MS-BS hyper-long handover, rapid level drop, PBGT handover, macro-micro handover,

directed-shift handover, traffic handover (initiated by BSC), query handover (initiated by

MSC), and directed retry.

The priority order of handover algorithm is described as follows:

Subcell handover > uplink/downlink interference handover > uplink/downlink quality

handover > uplink/downlink level handover > MS-BS hyper-long handover > rapid level

drop > PBGT handover > macro-micro handover > directed-shift handover.

Note that traffic handover and query handover are actively initiated by BSC and MSC,

respectively. Directed retry is initiated during call establishment, so the process is

different from those based on above handover algorithm.



Except “uplink/downlink quality handover” and “uplink/downlink level handover” algorithm,

there is ON/OFF setting for each handover algorithm, in order to facilitate on-site

configuration.

Note that handover criteria should be set higher than power control criteria on the same

decision condition, in order to do power control firstly.

3.4 Target Cell Selection

3.4.1 Intra-cell Handover

Serving cell need not be replaced for intra-cell handover. You only need change carrier

and timeslot. First select carrier. If the carrier is same, select the timeslot with the lowest

interference band for handover. If the interference band is same, select any timeslot to

do handover.

Intra-cell handover also includes inter-subcell handover; please refer to “ZGO-05-02-009

Concentric Circle Technology” and “ ZGO-04-02-005 Co-BCCH ".

3.4.2 Inter-cell handover

If inter-cell handover occurs, you should consider layer selection policy and handover

decision criterion to select the target cell.

For detailed description of layer selection policy, please refer to "ZGO-05-02-008

Multi-layer Cell Structure".

The handover decision criterions are outlined as follows:

Criterion 1: AvRxLevNCell(n) > RXLEV_MIN(n) + MAX(0,(MS_TXPWR_MAX(n)- P(n))

Criterion 2: PBGT(n) > HO_MARGIN(n)

Criterion 3: AvRxLevNCell(n) > avRxLevDL + HO_MARGIN_LEVEL(n)

Criterion 4: AvRxLevNCell(n) > avRxLevDL + HO_MARGIN_QUAL(n)



Table 3-2 describes the parameters mentioned in the criterions above.

Table 3-2 Description of Handover Cell Judgment Parameters

Parameter Meaning

RXLEV_MIN(N) The minimum reception level required for handover to

this adjacent cell

PBGT(N) Power budget of this adjacent cell

HO_MARGIN(N) Power budget threshold of handover to this adjacent

cell

HO_MARGIN_QUAL(N) Quality level threshold of handover to this adjacent cell

HO_MARGIN_LEVEL(N) Level threshold of handover to this adjacent cell

MS_TXPWR_MAX(n) Max power allowed in this adjacent cell for MS

P (n) Power capability of adjacent cell for MS

avRxLevDL Average of downlink level for current MS

AvRxLevNcell (N) Average of downlink level in this adjacent cell

You can combine criterion 1~4 to select the target cell. Criterion 1 is a necessary

required condition, which means the average level of the handover-to adjacent cell must

be larger than the minimum handover level.

Comprehensively consider layer selection policy and handover decision criterion, the

policies to select the target cell due to different handover reasons are listed in Table 3-3



Table 3-3 Target Cell Selection Policy due to Different Handover Reasons

Handover

Causes Layer selection policy

Handover decision

criterion

Subcell

handover Pico timer invalid Criterion 1

Uplink/downlink

interference

handover

Pico timer invalid Criterion 1

UL/DL Quality

Handover

If pico timer is valid, select the cell in the

sequence of upper layer - same layer -

lower layer.

Criterion 1&4

UL/DL Level

Handover

If pico timer is valid, select the cell in the

sequence of upper layer - same layer -

lower layer.

Criterion 1&3

MS-BS

Ultra-Distance

Handover

If pico timer is valid, upper layer is

preferred, otherwise the same layer is

preferred.

Criterion 1

Rapid Level

Drop Handover

Pico timer is invalid. Related cell is

preferred. If there is no related cell, select

the cell in the sequence of upper layer -

same layer - lower layer.

Criterion 1

PBGT

Handover

Determine it based on serving cell

parameter, PbgtHoLayer Criterion 1&2

Handover from

Macro- to

Micro-cell

Only lower layer Criterion 1

Directed-shift


Traffic


Soliciting

Handover



preferred.

Criterion 1

Directed retry

indication



preferred.

Criterion 1



Note that the pico timer is set during the handover initialization, which is performed after

the access of MS in the case of immediate assignment, assignment or handoff. Before

the pico timer expires, handover is performed according to the sequence: upper layer -

same layer - lower layer. But when the pico timer expires, handover is performed in the

sequence: same layer - upper layer - lower layer.

Sort the target cells after the proper adjacent cells are searched out, then the best cell is

selected finally.

3.5 Sorting Target Cell

There are 3 decisive factors for sorting target cell: priority, traffic and radio condition.

Priority and traffic are the main factors, if these two factors lead to same results, radio

condition is picked up to sort.

Priority comprises static priority and dynamic priority. The static priorities for different

target cells are set based on network traffic and handover success rate. The system

prefers to handover to the target cell with higher priority. Also, the system can

automatically adjust the priority of target cell and set the dynamic priority based on traffic

and congestion in target cell.

The rule of sorting adjacent cells is described as follows:

First sort target cells based on cell priority. If dynamic priority is set, dynamic priority is

used, if not, static priority is used.

If two cells have the same priorities, sort target cell based on power budget margin.

For detailed information about dynamic priority, please refer to “ZGO-02-02-002

Dynamic Handover Priority Algorithm”.

If the priority of target cell is same, sort it based on power budget margin.



4 Parameters and Configurations

4.1 Parameter List

Table 4-1 Parameter List

SN Name Figure

1 BSC intracell handover enable Figure 6-1

2 Allow intra-Cell handover attempt due to uplink

interference (Low Speed) Figure 6-2

3 Allow intra-Cell handover attempt due to downlink

interference (Low Speed) Figure 6-2

4 Uplink interference quality offset Figure 6-3

5 Uplink interference level offset Figure 6-3

6 Downlink interference quality offset Figure 6-3

7 Downlink interference level offset Figure 6-3

8 Uplink receive level Threshold Figure 6-4

9 Downlink receive level Threshold Figure 6-4

10 Uplink receive quality Threshold Figure 6-4

11 Downlink receive quality Threshold Figure 6-4

12 Uplink receive level Value P Figure 6-4

13 Uplink receive level Value N Figure 6-4

14 Downlink receive level Value P Figure 6-4

15 Downlink receive level Value N Figure 6-4

16 Uplink receive quality Value P Figure 6-4

17 Uplink receive quality Value N Figure 6-4

18 Downlink receive quality Value P Figure 6-4

19 Downlink receive quality Value N Figure 6-4

20 Allow quality handover in uplink(Low Speed) Figure 6-5

21 Allow level handover in uplink(Low Speed) Figure 6-5

22 Allow quality handover in downlink(Low Speed) Figure 6-5

23 Allow level handover in downlink(Low Speed) Figure 6-5



4.2 Parameter Configuration

Table 4-2 Configuration rule of BSC intracell handover enable

Full name BSC intracell handover enable

Abbreviation HoIntraEnable

Description “0” means not allowed;

“1” means allowed

Managed object GBssHandoverControl

Value range 0..1

Unit NA

Default value 1

Table 4-3 Configuration rule of Allow intra-Cell handover attempt due to uplink

interference (Low Speed)

Full name Allow intra-Cell handover attempt due to uplink interference

(Low Speed)

Abbreviation hoControlIntfUl_L



Managed object GHandoverControl

Value range 0..1

Unit NA

Default value 0

Table 4-4 Configuration rule of Allow intra-Cell handover attempt due to downlink


Full name Allow intra-Cell handover attempt due to downlink


Abbreviation hoControlIntfDl_L






Value range 0..1

Unit NA

Default value 0

Table 4-5 Configuration rule of Uplink interference quality offset

Full name Uplink interference quality offset

Abbreviation qOffSetUl

Description It helps to determine whether the intracell interference happens


Value range 0~20

Unit NA

Default value 10

Table 4-6 Configuration rule of Uplink interference level offset

Full name Uplink interference level offset

Abbreviation sOffSetUl



Value range 0~20

Unit NA

Default value 15

Table 4-7 Configuration rule of Downlink interference quality offset

Full name Downlink interference quality offset

Abbreviation qOffSetDl



Value range 0~20

Unit NA

Default value 10



Table 4-8 Configuration rule of Downlink interference level offset

Full name Downlink interference level offset

Abbreviation sOffSetDl



Value range 0~20

Unit NA

Default value 10

Table 4-9 Configuration rule of Uplink receive level Threshold

Full name Uplink receive level Threshold

Abbreviation hoUlLevThs

Description

1:-110~-109 2:-109~-108 3:-108~-107 4:-107~-106

5:-106~-105 6:-105~-104 7:-104~-103 8:-103~-102

9:-102~-101 10:-101~-100 11:-100~-99 12:-99~-98

13:-98~-97 14:-97~-96 15:-96~-95 16:-95~-94

17:-94~-93 18:-93~-92 19:-92~-91 20:-91~-90

21:-90~-89 22:-89~-88 23:-88~-87 24:-87~-86

25:-86~-85 26:-85~-84 27:-84~-83 28:-83~-82

29:-82~-81 30:-81~-80 31:-80~-79 32:-79~-78

33:-78~-77 34:-77~-76 35:-76~-75 36:-75~-74

37:-74~-73 38:-73~-72 39:-72~-71 40:-71~-70

41:-70~-69 42:-69~-68 43:-68~-67 44:-67~-66

45:-66~-65 46:-65~-64 47:-64~-63 48:-63~-62

49:-62~-61 50:-61~-60 51:-60~-59 52:-59~-58

53:-58~-57 54:-57~-56 55:-56~-55 56:-55~-54

57:-54~-53 58:-53~-52 59:-52~-51 60:-51~-50

61:-50~-49 62:-49~-48 63:>-48


Value range 0~63

Unit dBm

Default value 7

Table 4-10 Configuration rule of Downlink receive level Threshold



Full name Downlink receive level Threshold

Abbreviation hoDlLevThs

Description

1:-110~-109 2:-109~-108 3:-108~-107 4:-107~-106

5:-106~-105 6:-105~-104 7:-104~-103 8:-103~-102

9:-102~-101 10:-101~-100 11:-100~-99 12:-99~-98

13:-98~-97 14:-97~-96 15:-96~-95 16:-95~-94

17:-94~-93 18:-93~-92 19:-92~-91 20:-91~-90

21:-90~-89 22:-89~-88 23:-88~-87 24:-87~-86

25:-86~-85 26:-85~-84 27:-84~-83 28:-83~-82

29:-82~-81 30:-81~-80 31:-80~-79 32:-79~-78

33:-78~-77 34:-77~-76 35:-76~-75 36:-75~-74

37:-74~-73 38:-73~-72 39:-72~-71 40:-71~-70

41:-70~-69 42:-69~-68 43:-68~-67 44:-67~-66

45:-66~-65 46:-65~-64 47:-64~-63 48:-63~-62

49:-62~-61 50:-61~-60 51:-60~-59 52:-59~-58

53:-58~-57 54:-57~-56 55:-56~-55 56:-55~-54

57:-54~-53 58:-53~-52 59:-52~-51 60:-51~-50

61:-50~-49 62:-49~-48 63:>-48


Value range 0~63

Unit dBm

Default value 15

Table 4-11 Configuration rule of Uplink receive quality Threshold

Full name Uplink receive quality Threshold

Abbreviation hoUlQualThs

Description It defines a uplink receive quality threshold to decide when to

handover.


Value range 8~70

Unit NA

Default value 49

Table 4-12 Configuration rule of Downlink receive quality Threshold



Full name Downlink receive quality Threshold

Abbreviation hoDlQualThs

Description It defines a downlink receive quality threshold to decide when to

handover.


Value range 8~70

Unit NA

Default value 49

Table 4-13 Configuration rule of Uplink receive level Value P

Full name Uplink receive level Value P

Abbreviation hoUlLevP

Description

If there are P(number) average uplink receive level less than

related threshold in N(number) average uplink receive level,

then MS should be handover.


Value range 1~20

Unit NA

Default value 2

Table 4-14 Configuration rule of Uplink receive level Value N

Full name Uplink receive level Value N

Abbreviation hoUlLevN

Description

If there are P(number) average uplink receive level less than

related threshold in N(number) average uplink receive level,



Value range 1~20

Unit NA

Default value 3

Table 4-15 Configuration rule of Downlink receive level Value P



Full name Downlink receive level Value P

Abbreviation hoDlLevP

Description

If there are P(number) average downlink receive level less than

related threshold in N(number) average downlink receive level,



Value range 1~20

Unit NA

Default value 2

Table 4-16 Configuration rule of Downlink receive level Value N

Full name Downlink receive level Value N

Abbreviation hoDlLevN

Description

If there are P(number) average downlink receive level less than

related threshold in N(number) average downlink receive level,



Value range 1~20

Unit NA

Default value 3

Table 4-17 Configuration rule of Uplink receive quality Value P

Full name Uplink receive quality Value P

Abbreviation hoUlQualP

Description

If there are P(number) average uplink receive quality less than

related threshold in N(number) average uplink quality level,



Value range 1~20

Unit NA

Default value 2

Table 4-18 Configuration rule of Uplink receive quality Value N



Full name Uplink receive quality Value N

Abbreviation hoUlQualN

Description

If there are P(number) average uplink receive quality less than

related threshold in N(number) average uplink quality level,



Value range 1~20

Unit NA

Default value 3

Table 4-19 Configuration rule of Downlink receive quality Value P

Full name Downlink receive quality Value P

Abbreviation hoDlQualP

Description

If there are P(number) average downlink receive quality less

than related threshold in N(number) average downlink receive

quality, then MS should be handover.


Value range 1~20

Unit NA

Default value 2

Table 4-20 Configuration rule of Downlink receive quality Value N

Full name Downlink receive quality Value N

Abbreviation hoDlQualN

Description

If there are P(number) average downlink receive quality less

than related threshold in N(number) average downlink receive

quality, then MS should be handover.


Value range 1~20

Unit NA

Default value 3

Table 4-21 Configuration rule of Allow quality handover in uplink(Low Speed)



Full name Allow quality handover in uplink(Low Speed)

Abbreviation hoControlQualUl_L




Value range 0..1

Unit NA

Default value 1

Table 4-22 Configuration rule of Allow level handover in uplink(Low Speed)

Full name Allow level handover in uplink(Low Speed)

Abbreviation hoControlLevUl_L




Value range 0..1

Unit NA

Default value 1

Table 4-23 Configuration rule of Allow quality handover in downlink(Low Speed)

Full name Allow quality handover in downlink(Low Speed)

Abbreviation hoControlQualDl_L




Value range 0..1

Unit NA

Default value 1

Table 4-24 Configuration rule of Allow level handover in downlink(Low Speed)

Full name Allow level handover in downlink(Low Speed)

Abbreviation hoControlLevDl_L






Value range 0..1

Unit NA

Default value 1

5 Related Counters and Alarms

5.1 Related Counters

Table 5-1 Counters list

Counter ID Name

C901260004 Number of signaling TCH/F seizure attempts for handover

C901260005 Number of signaling TCH/F seizure success for handover

C901260006 Number of signaling TCH/F seizure failure for handover

C901260010 Number of signaling TCH/F allocation attempts for handover

C901260011 Number of signaling TCH/F allocation success for handover

C901260012 Number of signaling TCH/F allocation failure for handover

C901260016 Number of signaling TCH/F handover attempt

C901260017 Number of signaling TCH/F handover success

C901260018 Number of signaling TCH/F handover failure with the handover failure

message returned from MS

C901260019 Number of signaling TCH/F handover failure without the handover

failure message returned from MS

C901260023 Number of voice TCH/F seizure attempts for handover

C901260024 Number of voice TCH/F seizure success for handover

C901260025 Number of voice TCH/F seizure failure for handover



Counter ID Name

C901260032 Number of TCH/F allocation attempts by BSC for handover (speech

version1)

C901260033 Number of TCH/F allocation success by BSC for handover (speech

version1)

C901260034 Number of TCH/F allocation failure due to channel activation failure

for handover (speech version1)

C901260035 Number of TCH/F allocation failure due to BTS connection failure for

handover (speech version1)

C901260036 Number of TCH/F allocation failure due to TDMABIS board

connection failure for handover (speech version1)

C901260037 Number of TCH/F allocation failure due to TDMA inner connection

failure for handover (speech version1)


version2)


version2)


for handover(speech version2)







C901260056 Number of TCH/F allocation attempts by BSC for handover(speech

version3)

C901260057 Number of TCH/F allocation success by BSC for handover(speech

version3)









Counter ID Name



C901260065 Number of voice TCH/F handover attempts

C901260066 Number of voice TCH/F handover success

C901260067 Number of voice TCH/F handover failure with the handover failure


C901260068 Number of voice TCH/F handover failure without the handover failure


C901260072 Number of data TCH/F seizure attempts for handover

C901260073 Number of data TCH/F seizure success for handover

C901260074 Number of data TCH/F seizure failure for handover

C901260081 Number of data TCH/F allocation attempts for handover

C901260082 Number of data TCH/F allocation success for handover

C901260083 Number of data TCH/F allocation failure due to channel activation

failure for handover

C901260084 Number of data TCH/F allocation failure due to BTS connection failure

for handover

C901260085 Number of data TCH/F allocation failure due to TDMABIS board

connection failure for handover

C901260086 Number of data TCH/F allocation failure due to TDMA inner


C901260090 Number of data TCH/F handover attempts

C901260091 Number of data TCH/F handover success

C901260092 Number of data TCH/F handover failure with the handover failure


C901260093 Number of data TCH/F handover failure without the handover failure


C901260096 Number of TCH/F allocation failure for handover due to iTC board

connection failure (speech version1)

C901260097 Number of TCH/F allocation failure for handover due to resource

request to iTC failure (speech version1)




Counter ID Name








C901260111 Number of TCH/F allocation failure due to IPA inner connection failure







for handover (data)

C901260137 Number of signaling TCH/F seizure failure for handover (cause:abis)

C901260139 Number of voice TCH/F seizure failure for handover (cause:abis)

C901260141 Number of data TCH/F seizure failure for handover (cause:abis)

C901260143 Number of signaling TCH/F seizure failure for handover (cause:radio

resource)

C901260145 Number of voice TCH/F seizure failure for handover (cause:radio

resource)

C901260147 Number of data TCH/F seizure failure for handover (cause:radio

resource)

C901260154 Number of FR_V1 handover

C901260155 Number of FR_V1 handover success







Counter ID Name

C901260162 Number of seizure data TCH/F IFTA channel success for handover

C901260163 Number of seizure voice TCH/F IFTA channel success for handover

C901260166 Number of seizure data TCH/F IFTA channel failure due to uplink

softblock for handover

C901260167 Number of seizure voice TCH/F IFTA channel failure due to uplink


C901260170 Number of seizure data TCH/F IFTA channel failure due to downlink


C901260171 Number of seizure voice TCH/F IFTA channel failure due to downlink


C901260173 Number of TCH/F IFTA channel check failure for handover(speech

version1)


version2)


version3)

C901260179 Number of TCH/F IFTA channel check failure for handover(data)

C901260186 Number of handover of ordinary users due to resource being

preempted (TCH/F)

C901260194 Number of TCH/F allocation attempts by BSC for handover(speech

version4)

C901260195 Number of TCH/F allocation success by BSC for handover(speech

version4)



C901260197 Number of TCH/F allocation failure due to BIU connection failure for



version5)


version5)



Counter ID Name



C901260205 Number of TCH/F allocation failure due to BIU connection failure for


C901260209 Number of TCH/F allocation failure due to request AIPB resource


C901260210 Number of TCH/F allocation failure due to request UDP port failure for


C901260211 Number of TCH/F allocation failure due to AIPB connection failure for


C901260215 Number of TCH/F allocation failure due to request AIPB resource


C901260216 Number of TCH/F allocation failure due to request UDP port failure for


C901260217 Number of TCH/F allocation failure due to AIPB connection failure for






C901260228 Number of TCH/F voice allocation failure for handover

C901260229 Number of TCH/F voice allocation success for handover

C901260232 Number of TCH/F data allocation failure for handover

C901260233 Number of TCH/F data allocation success for handover

C901270004 Number of signaling TCH/H seizure attempts for handover

C901270005 Number of signaling TCH/H seizure success for handover

C901270006 Number of signaling TCH/H seizure failure for handover

C901270010 Number of signaling TCH/H allocation attempts by BSC for handover

C901270011 Number of signaling TCH/H allocation success for handover

C901270012 Number of signaling TCH/H allocation failure for handover



Counter ID Name

C901270016 Number of signaling TCH/H handover attempts

C901270017 Number of signaling TCH/H handover success

C901270018 Number of signaling TCH/H handover failure with the handover failure


C901270019 Number of signaling TCH/H handover failure without the handover

failure message returned from MS

C901270023 Number of voice TCH/H seizure attempts for handover

C901270024 Number of voice TCH/H seizure success for handover

C901270025 Number of voice TCH/H seizure failure for handover

C901270032 Number of TCH/H allocation attempts by BSC during handover

(speech version1)

C901270033 Number of TCH/H allocation success during handover (speech

version1)

C901270034 Number of TCH/H allocation failure due to channel activation failure


C901270035 Number of TCH/H allocation failure due to BTS connection failure for


C901270036 Number of TCH/H allocation failure due to TDMABIS board


C901270037 Number of TCH/H allocation failure due to TDMA inner connection


C901270044 Number of TCH/H allocation attempts for handover by BSC(speech

version2)

C901270045 Number of TCH/H allocation success for handover (speech version2)











Counter ID Name

C901270056 Number of TCH/H allocation attempts by BSC for handover(speech

version3)

C901270057 Number of TCH/H allocation success for handover(speech version3)









C901270065 Number of voice TCH/H handover attempts

C901270066 Number of voice TCH/H handover success

C901270067 Number of voice TCH/H handover failure with the handover failure


C901270068 Number of voice TCH/H handover failure without the handover failure


C901270072 Number of data TCH/H seizure attempts for handover

C901270073 Number of data TCH/H seizure success for handover

C901270074 Number of data TCH/H seizure failure for handover

C901270081 Number of data TCH/H allocation attempts by BSC

C901270082 Number of data TCH/H allocation success for handover

C901270083 Number of data TCH/H allocation failure due to channel activation


C901270084 Number of data TCH/H allocation failure due to BTS connection


C901270085 Number of data TCH/H allocation failure due to TDMABIS board


C901270086 Number of data TCH/H allocation failure due to TDMA inner


C901270090 Number of data TCH/H handover attempts

C901270091 Number of data TCH/H handover success



Counter ID Name

C901270092 Number of data TCH/H handover failure with the handover failure


C901270093 Number of data TCH/H handover failure without the handover failure


C901270096 Number of TCH/H allocation failure due to iTC board connection

failure for handover (Speech version 1)

C901270097 Number of TCH/H allocation failure due to failed resource request to

iTC for handover (Speech version 1)









C901270111 Number of TCH/H allocation failure due to IPA inner connection







failure for handover (data)

C901270137 Number of signaling TCH/H seizure failure for handover due to Abis

lack

C901270139 Number of voice TCH/H seizure failure for handover (cause:abis)

C901270141 Number of data TCH/H seizure failure for handover (cause:abis)

C901270143 Number of signaling TCH/H seizure failure for handover (cause:radio

resource)

C901270145 Number of voice TCH/H seizure failure for handover (cause:radio

resource)



Counter ID Name

C901270147 Number of data TCH/H seizure failure for handover (cause:radio

resource)

C901270152 Number of HR_V1 handover attempts

C901270153 Number of HR_V1 handover success

C901270154 Number of HR_V3 handover


C901270158 Number of seizure data TCH/H IFTA channel success for handover

C901270159 Number of seizure voice TCH/H IFTA channel success for handover

C901270162 Number of seizure voice TCH/H IFTA channel failure due to uplink


C901270163 Number of seizure voice TCH/H IFTA channel failure due to uplink


C901270166 Number of seizure data TCH/H IFTA channel failure due to downlink


C901270167 Number of seizure voice TCH/H IFTA channel failure due to downlink


C901270169 Number of TCH/H IFTA channel check failure for handover(speech

version1)

C901270171 Number of TCH/H IFTA channel check failure for handover(speech

version3)

C901270178 Number of handover of ordinary users due to resource being

preempted (TCH/H)

C901270184 Number of HR_V4 handover


C901270190 Number of TCH/H allocation attempts by BSC during handover

(speech version4)

C901270191 Number of TCH/H allocation success during handover (speech

version4)



C901270193 Number of TCH/H allocation failure due to BIU connection failure for




Counter ID Name

C901270197 Number of TCH/H allocation failure due to request AIPB resource


C901270198 Number of TCH/H allocation failure due to request UDP port failure for


C901270199 Number of TCH/H allocation failure due to AIPB connection failure for


C901270202 Number of TCH/H voice allocation failure for handover

C901270203 Number of TCH/H voice allocation success for handover

C901270206 Number of TCH/H data allocation failure for handover

C901270207 Number of TCH/H data allocation success for handover

C901050044 Number of receiving lower PRI user handover failure (assignment

forced handover)

C901070013 Number of signaling TCH/F drops due to handover failure

C901070020 Number of voice TCH/F drops due to handover failure

C901070027 Number of data TCH/F drops due to handover failure

C901070034 Number of signaling TCH/H drops due to handover failure

C901070041 Number of voice TCH/H drops due to handover failure

C901070048 Number of data TCH/H drops due to handover failure

C901070108 Number of voice TCH/F drops due to handover fail for power

adjustment

C901070109 Number of voice TCH/H drops due to handover fail for power

adjustment

C901070137 Number of Speech TCH/F drops due to intra-cell handover failure

C901070138 Number of Data TCH/F drops due to intra-cell handover failure

C901070139 Number of signaling TCH/F drops due to intra-cell handover failure

C901070140 Number of Speech TCH/H drops due to intra-cell handover failure

C901070141 Number of Data TCH/H drops due to intra-cell handover failure

C901070142 Number of signaling TCH/H drops due to intra-cell handover failure



Counter ID Name

C901070144 Number of Speech TCH/F drops due to inter-cell handover failure

C901070145 Number of Data TCH/F drops due to inter-cell handover failure

C901070146 Number of signaling TCH/F drops due to inter-cell handover failure

C901070147 Number of Speech TCH/H drops due to inter-cell handover failure

C901070148 Number of Data TCH/H drops due to inter-cell handover failure

C901070149 Number of signaling TCH/H drops due to inter-cell handover failure

C901070151 Number of Speech TCH/F drops due to outgoing handover failure

C901070152 Number of Data TCH/F drops due to outgoing handover failure

C901070153 Number of signaling TCH/F drops due to outgoing handover failure

C901070154 Number of Speech TCH/H drops due to outgoing handover failure

C901070155 Number of Data TCH/H drops due to outgoing handover failure

C901070156 Number of signaling TCH/H drops due to outgoing handover failure

C901070157 Number of Speech TCH/F drops due to subcell1 to subcell2 handover

failure

C901070158 Number of Data TCH/F drops due to subcell1 to subcell2 handover

failure

C901070159 Number of Signal TCH/F drops due to subcell1 to subcell2 handover

failure

C901070160 Number of Speech TCH/H drops due to subcell1 to subcell2 handover

failure

C901070161 Number of Data TCH/H drops due to subcell1 to subcell2 handover

failure

C901070162 Number of Signal TCH/H drops due to subcell1 to subcell2 handover

failure

C901070163 Number of Speech TCH/F drops due to subcell2 to subcell1 handover

failure

C901070164 Number of Data TCH/F drops due to subcell2to subcell1 handover

failure



Counter ID Name

C901070165 Number of Signal TCH/F drops due to subcell2 to subcell1 handover

failure

C901070166 Number of Speech TCH/H drops due to subcell2 to subcell1 handover

failure

C901070167 Number of Data TCH/H drops due to subcell2 to subcell1 handover

failure

C901070168 Number of Signal TCH/H drops due to subcell2 to subcell1 handover

failure

C901070216 Number of HO drops due Interf UL

C901070217 Number of HO drops due Interf DL

C901070218 Number of HO drops due QUAL UL

C901070219 Number of HO drops due QUAL DL

C901070220 Number of HO drops due LEVEL UL

C901070221 Number of HO drops due LEVEL DL

C901070222 Number of HO drops due RAPID UL

C901070223 Number of HO drops due PBGT

C901070224 Number of HO drops due MICRO to MICRO

C901070225 Number of HO drops due SUB Cell1 to SUB Cell2

C901070226 Number of HO drops due SUB Cell2 to SUB Cell1

C901070227 Number of HO drops due PREEMPT

C901070228 Number of HO drops due TRAFFIC

C901070229 Number of HO drops due DLRAPID

C901070230 Number of HO drops due HRFR

C901070231 Number of HO drops due RAPIDQUAL

C901070232 Number of HO drops due Dual Frequence Traffic

C901070233 Number of HO drops due Downlink Signal Quality

C901070234 Number of HO drops due Long Distance between MS and Network

C901070235 Number of HO drops due Directed Retry

C901070236 Number of HO drops due Enquired Handover Candidate

C901070237 Number of HO drops due Directed Force Move



Counter ID Name

C901070239 Number of drop call on TCH/F due to syn meas Trx

C901070240 Number of drop call on TCH/H due to syn meas Trx

C901060001 Number of handover attempts due to direct retry

C901060025 Number of TCH/F handover attempts due to uplink strength

C901060026 Number of TCH/F handover attempts due to downlink strength

C901060027 Number of TCH/F handover attempts due to uplink quality

C901060028 Number of TCH/F handover attempts due to downlink quality

C901060029 Number of TCH/F handover attempts due to uplink interference

C901060030 Number of TCH/F handover attempts due to downlink interference

C901060031 Number of TCH/F handover attempts due to good C/I

C901060032 Number of TCH/F handover attempts due to bad C/I

C901060033 Number of TCH/F handover attempts due to PBGT

C901060034 Number of TCH/F handover attempts due to large TA

C901060035 Number of TCH/F handover attempts due to uplink fast fading

C901060036 Number of TCH/F handover attempts due to macro-micro switch

C901060037 Number of TCH/F handover attempts due to MSC request

C901060038 Number of TCH/F handover attempts due to traffic

C901060039 Number of TCH/F handover attempts due to large TA and path loss

C901060040 Number of TCH/F handover attempts due to small TA and path loss

C901060041 Number of TCH/F handover attempts due to good level of FDD

adjacent cell

C901060042 Number of TCH/F handover attempts due to forced transfer

C901060044 Number of attempts of forced handover during handover (on TCH/F)

C901060045 Number of handovers from common carrier to extended carrier (on

TCH/F)

C901060046 Number of handovers from extended carrier to common carrier (on

TCH/F)



Counter ID Name

C901060047 Number of TCH/F handover attempts due to other causes

C901060048 Number of TCH/H handover attempts due to uplink strength

C901060049 Number of TCH/H handover attempts due to downlink strength

C901060050 Number of TCH/H handover attempts due to uplink quality

C901060051 Number of TCH/H handover attempts due to downlink quality

C901060052 Number of TCH/H handover attempts due to uplink interference

C901060053 Number of TCH/H handover attempts due to downlink interference

C901060054 Number of TCH/H handover attempts due to good C/I

C901060055 Number of TCH/H handover attempts due to bad C/I

C901060056 Number of TCH/H handover attempts due to PBGT

C901060057 Number of TCH/H handover attempts due to large TA

C901060058 Number of TCH/H handover attempts due to uplink fast fading

C901060059 Number of TCH/H handover attempts due to macro-micro switch

C901060060 Number of TCH/H handover attempts due to MSC request

C901060061 Number of TCH/H handover attempts due to traffic

C901060062 Number of TCH/H handover attempts due to large TA and path loss

C901060063 Number of TCH/H handover attempts due to small TA and path loss

C901060064 Number of TCH/H handover attempts due to good level of FDD

adjacent cell

C901060065 Number of TCH/H handover attempts due to forced transfer

C901060067 Number of attempts of forced handover during handover (on TCH/H)

C901060068 Number of handovers from common carrier to extended carrier (on

TCH/H)

C901060069 Number of handovers from extended carrier to common carrier (on

TCH/H)

C901060070 Number of TCH/H handover attempts due to other causes



Counter ID Name

C901060071 Number of TCH/F intra-cell handover attempts due to CS channel

transfer

C901060072 Number of TCH/H intra-cell handover attempts due to CS channel

transfer

C901060073 Number of TCH/H intra-cell handover attempts due to HR fragment

reorganization

C901060074 Number of TCH/F intra-cell handover attempts due to energy

conservation

C901060075 Number of TCH/H intra-cell handover attempts due to energy

conservation

C901060076 Number of TCH/F intra-cell handover attempts due to CS channel

being forcibly released

C901060077 Number of TCH/H intra-cell handover attempts due to CS channel

being forcibly released

C901060078 Number of TCH/F handover attempts due to FR to HR during cell

busy

C901060080 Number of TCH/F handover attempts due to downlink rapid drop

C901060081 Number of TCH/H handover attempts due to downlink rapid drop

C901060098 Number of TCH/F handover attempts due to signal quality

C901060099 Number of TCH/H handover attempts due to signal quality

C901090105 Number of intra-cell handover attempts

C901090106 Number of intra-cell handover

C901090107 Number of intra-cell handover success

C901090122 Number of intra-cell handover attempts from TCH/F

C901090123 Number of intra-cell TCH/F-to-TCH/F handover

C901090124 Number of intra-cell TCH/F-to-TCH/F handover success

C901090125 Number of intra-cell TCH/F-to-TCH/H handover

C901090126 Number of intra-cell TCH/F-to-TCH/H handover success

C901090127 Number of intra-cell handover attempts from TCH/H

C901090128 Number of intra-cell TCH/H-to-TCH/F handover



Counter ID Name

C901090129 Number of intra-cell TCH/H-to-TCH/F handover success

C901090130 Number of intra-cell TCH/H-to-TCH/H handover

C901090131 Number of intra-cell TCH/H-to-TCH/H handover success

C901090132 Number of inter-cell handover attempts from TCH/F

C901090133 Number of inter-cell TCH/F-to-TCH/F handover

C901090134 Number of inter-cell TCH/F-to-TCH/F handover success

C901090135 Number of inter-cell TCH/F-to-TCH/H handover

C901090136 Number of inter-cell TCH/F-to-TCH/H handover success

C901090137 Number of inter-cell handover attempts from TCH/H

C901090138 Number of inter-cell TCH/H-to-TCH/F handover

C901090139 Number of inter-cell TCH/H-to-TCH/F handover success

C901090140 Number of inter-cell TCH/H-to-TCH/H handover

C901090141 Number of inter-cell TCH/H-to-TCH/H handover success

C901090148 Number of intra-cell invalid handover

C901090214 Number of handover attempt from FR to HR(V3) due to high load

C901090215 Number of handover from FR to HR(V3) due to high load

C901090216 Number of handover success from FR to HR(V3) due to high load

C901090217 Number of handover attempt from FR to HR(V1) due to high load

C901090218 Number of handover from FR to HR(V1) due to high load

C901090219 Number of handover success from FR to HR(V1) due to high load

C901090220 Number of handover attempt from HR(V3) to FR due to bad quality

C901090221 Number of handover from HR(V3) to FR due to bad quality

C901090222 Number of handover success from HR(V3) to FR due to bad quality

C901090223 Number of handover attempt from HR(V1) to FR due to bad quality

C901090224 Number of handover from HR(V1) to FR due to bad quality



Counter ID Name

C901090225 Number of handover success from HR(V1) to FR due to bad quality

C901090264 Number of forbid sending hand command during releasing

C901090267 Number of Intra-cell handover failure lead to return

C902500001 Number of handover attempt from HR(V1) to FR due to high load

C902500002 Number of handover from HR(V1) to FR due to high load

C902500003 Number of handover success from HR(V1) to FR due to high load

C902500004 Number of handover attempt from HR(V3) to FR due to high load

C902500005 Number of handover from HR(V3) to FR due to high load

C902500006 Number of handover success from HR(V3) to FR due to high load

C902500009 Number of Handover Cmd Lost optimize when handover

C902500013 Number of ul_Interf intracell handover which does not meet the

required of interference band

C902500014 Number of dl_Interf intracell handover which does not meet the

required of interference band

C902500015 Number of back to Source cell successful when handover (On TCH/F)

C902500016 Number of back to Source cell failure when handover(On TCH/F)

C902500017 Number of back to Source cell successful when handover (On

TCH/H)

C902500018 Number of back to Source cell failure when handover(On TCH/H)

C901540003 Number of voice allocations of reserved full rate channel in handover

C901540004 Number of data allocations of reserved full rate channel in handover

C901560004 Number of RANCS module's receiving IMSI during handover

C901880001 Number of handover attempts due to uplink received strength

C901880002 Number of handover attempts due to downlink received strength

C901880003 Number of handover attempts due to uplink quality

C901880004 Number of handover attempts due to downlink quality



Counter ID Name

C901880005 Number of handover attempts due to uplink interference

C901880006 Number of handover attempts due to downlink interference

C901880007 Number of handover attempts due to PBGT

C901880008 Number of handover attempts due to large TA

C901880009 Number of handover attempts due to uplink break up quickly

C901880010 Number of handover attempts due to macro-micro switch

C901880011 Number of handover attempts due to high traffic

C901890020 Number of intra-cell handover attempts

C901890021 Number of intra-cell handover executions

C901890022 Number of successful intra-cell handover

C901890023 Number of invalid intra-cell handover

C902000048 Number of Error Indications due to Handover Access Level Low(On

TCH/F)

C902000049 Number of Error Indications due to Handover Access Level Low(On

TCH/H)

C902000051 Number of Error Indications due to Handover Access CI Low(On

TCH/F)

C902000052 Number of Error Indications due to Handover Access CI Low(On

TCH/H)

C902510007 Number of TCH/F allocation failure due to apply IPA board failure for

handover(speech)

C902510008 Number of TCH/F allocation failure due to apply inner-TC board

failure for handover(speech)

C902510009 Number of TCH/F pre-apply connection failure first time for

handover(speech)

C902510010 Number of TCH/F pre-apply connection failure second time for

handover(speech)

C902510011 Number of TCH/F allocation failure due to pre-apply connection failure

third time for handover(speech)


request to iTC failure (speech)



Counter ID Name

C902510058 Number of TCH/F allocation failure due to apply Abis resource failure


C902510059 Number of TCH/F allocation failure due to apply A resource failure for














C902510066 Number of TCH/F allocation failure due to TDMA board connection

failure for handover(speech version1)



















Counter ID Name





































Counter ID Name























C902510109 Number of TCH/F allocation failure due to apply IPA board failure for

handover(data)

C902510110 Number of TCH/F allocation failure due to apply inner-TC board

failure for handover(data)

C902510111 Number of TCH/F pre-apply connection failure first time for

handover(data)

C902510112 Number of TCH/F pre-apply connection failure second time for

handover(data)

C902510113 Number of TCH/F allocation failure due to pre-apply connection failure

third time for handover(data)


request to iTC failure (data)



Counter ID Name


for handover (data)


handover (data)


for handover (data)


handover (data)


connection failure for handover (data)




connection failure (data)


for handover (data)



C902520007 Number of TCH/H allocation failure due to apply IPA board failure for

handover(speech)

C902520008 Number of TCH/H allocation failure due to apply inner-TC board

failure for handover(speech)

C902520009 Number of TCH/H pre-apply connection failure first time for

handover(speech)

C902520010 Number of TCH/H pre-apply connection failure second time for

handover(speech)

C902520011 Number of TCH/H allocation failure due to pre-apply connection

failure third time for handover(speech)

C902520012 Number of TCH/H allocation failure for handover due to resource

request to iTC failure (speech)

C902520049 Number of TCH/H allocation failure due to apply Abis resource failure


C902520050 Number of TCH/H allocation failure due to apply A resource failure for




Counter ID Name









C902520055 Number of TCH/H allocation failure for handover due to iTC board




C902520057 Number of TCH/H allocation failure due to TDMA board connection
























Counter ID Name





































Counter ID Name

C902520091 Number of TCH/H allocation failure due to apply IPA board failure for

handover(data)

C902520092 Number of TCH/H allocation failure due to apply inner-TC board


C902520093 Number of TCH/H pre-apply connection failure first time for

handover(data)

C902520094 Number of TCH/H pre-apply connection failure second time for

handover(data)

C902520095 Number of TCH/H allocation failure due to pre-apply connection

failure third time for handover(data)

C902520096 Number of TCH/H allocation failure for handover due to resource

request to iTC failure (data)


for handover (data)


handover (data)


for handover (data)


handover (data)


connection failure for handover (data)




connection failure (data)





C901100013 Number of handover attempts from selected cell to the adjacent cell

due to PBGT

C901100014 Number of handover success from selected cell to the adjacent cell

due to PBGT



Counter ID Name

C901100017 Number of ping pong handover(handover to source cell)

C901100034 Number of handover from selected cell to the adjacent cell due to

PBGT

C901100049 Number of Speech TCH drops due to handover failure to this cell

C901100050 Number of Data TCH drops due to handover failure to this cell

C901100051 Number of Signal TCH drops due to handover failure to this cell

C901100052 Number of Speech TCH/F drops due to handover failure to this cell

C901100053 Number of Data TCH/F drops due to handover failure to this cell

C901100054 Number of Signal TCH/F drops due to handover failure to this cell

C901100055 Number of Speech TCH/H drops due to handover failure to this cell

C901100056 Number of Data TCH/H drops due to handover failure to this cell

C901100057 Number of Signal TCH/H drops due to handover failure to this cell

C901100066 Number of clock syn-measure handover attempt

C901100068 Number of invalid syn-measure handover perform

C901100069 Number of invalid syn-measure handover success

C901100070 Number of valid syn-measure handover perform

C901100071 Number of valid syn-measure handover success

C901240023 Number of handovers failure

C901230011 Number of call drops on TCH due to handover

5.2 Related Alarms

This feature has no related alarms.



6 Engineering Guide

6.1 Application Scenario

This feature is applied while the handover should be enabled.

When MS moves from a site coverage area to another site area or call quality drops due

to interference during conversation, a better voice channel should be used to keep the

conversation and do the proper handover based on target cell.

If target cell and source cell are under a base station, intra-cell handover is initiated. If

target cell and source cell are under different base stations, inter-cell handover is

initiated.

The handover takes the uplink/downlink level quality and TA value, which are measured

by MS and base station, to determine if it should hand over to a cell based on handover

decision criterion and resource allocation algorithm.

6.2 Configuration Description

6.2.1 BSC Intra-cell Handover

Step1: GUI: [Managed Element->GSM Logical Configuration->Global Information

Configuration->BSS Function Handover Control], Set “BSC intracell handover enable” to

be “allowed”.

Figure 6-1 BSC Intra-cell Handover Parameters 1



Step2: GUI: [Managed Element->GSM Logical Configuration->Cell Information

Configuration->Handover Control], Set” Allow intra-Cell handover attempt due to uplink

interference(Low Speed)” to be “Yes”, Set” Allow intra-Cell handover attempt due to

downlink interference(Low Speed)”to be “Yes”



Configuration->Handover Control], Set” Uplink interference quality offset” to be “0”, Set

“Uplink interference level offset” to be “0”, Set” downlink interference quality offset” to be

“0”, Set “downlink interference level offset” to be “0”.




6.2.2 BSC Inter-cell Handover


Configuration->GPRS Configuration->PS Handover Control], Set “Uplink receive level

Threshold/ Downlink receive level Threshold/ Uplink receive quality Threshold/ Downlink

receive quality Threshold/ Uplink receive level Value P / Uplink receive level Value N/

Downlink receive level Value P /Downlink receive level Value N/ Uplink receive quality

Value P / Uplink receive quality Value N/ Downlink receive quality Value P /Downlink

receive quality Value N” to be proper values.

Figure 6-4 BSC Inter-cell Handover Parameters 1




Configuration->Handover Control], Set “Allow quality handover in uplink(Low Speed)/

Allow level handover in uplink(Low Speed)/ Allow quality handover in downlink(Low

Speed)/ Allow level handover in downlink(Low Speed)” to be “Yes”.



Configuration->Adjacent Relation Configuration->Adjacent GSM Cell Configuration],

Please refer to your adjacent GSM Cell parameter table, Set “Parent DN/DN of source



Gsmcell/Relation type/MIN power for handover access/MIN threshold of signal level for

handover on power level/ MIN threshold of signal level for handover on quality” to be

proper values.


6.2.3 MSC Intra-cell Handover


Configuration->GPRS Configuration->PS Handover Control], Set “Uplink receive level

Threshold/ Downlink receive level Threshold/ Uplink receive quality Threshold/ Downlink

receive quality Threshold/ Uplink receive level Value P / Uplink receive level Value N/

Downlink receive level Value P /Downlink receive level Value N/ Uplink receive quality

Value P / Uplink receive quality Value N/ Downlink receive quality Value P /Downlink

receive quality Value N” to be proper values.

Figure 6-7 MSC Intra-cell Handover Parameters 1






Speed)/ Allow level handover in downlink(Low Speed)” to be “Yes”.


Step3: GUI: [GUI: Managed Element->GSM Logical Configuration->External Resource

Configuration->External GSM Cell Configuration], Please refer to your External GSM



Cell parameter table, Set “Managed Object Description/Cell identity/BCCH

arfcn/NCC/BCC/LAC/MCC/MNC/FreqBand/Cell type” to be proper values.



Configuration->Adjacent Relation Configuration->Adjacent GSM Cell Configuration],

Please refer to your adjacent GSM Cell parameter table, Set “Parent DN/DN of source

Gsmcell/Relation type/MIN power for handover access/MIN threshold of signal level for

handover on power level/ MIN threshold of signal level for handover on quality” to be

proper values.




6.2.4 MSC Intra-cell Handover

The configuration is the same as 6.2.3 MSC Intra-cell Handover, except configure

External GSM Cell & Adjustment GSM Cell as different cell.

6.3 Feature Validation

Basic Handover has different types, and we only list a typical kind as following. The

differences are only on whether handover occurs in BSC Intra-cell, BSC Inter-cell, MSC

Intra-cell or MSC Inter-cell.



Test Item Inter-cell,Intra-BSC Handover

Precondition 1. check CN is healthy;

2. check BSC is healthy;

3. check SDR is healthy;

4. check Cell A and Cell B in the same BSC are

available,and check default cell configuration and

parameters in BSC;

5. MSs are ready;

6. ensure good radio environment;

Test Steps 1. Cell A is the serving cell,set Cell B as the neighbour

cell of Cell A,and set Min threshold of signal level for

handover on quality as proper value(such as ”0”) in

Adjacent GSM cell configuration.

2. Set “Allow quality handover in uplink/downlink(low

speed)” as “yes” in Handover control.

3. Set “Uplink/Downlink receive quality threshold” as

proper value in Handover control. Smaller is better,

such as “8”.

4. Open BSSAP of two cells in signaling trace.

5. MS1 makes a call in serving cell.

6. Add interference (use shielding device etc.) in the

serving cell to make MS’s UL/DL quality worse than

threshold.

Anticipative Result 1. MS handover from cell A to cell B, and no call-drop.

2. There is ”handover performed” message in BSSAP

signaling trace,and handover cause is”UL quality”

or ”DL quality”.

Test Result 1. MS handover successfully.

Parameters Setting Default parameters

6.4 Feature Turn off

GUI: [Managed Element->GSM Logical Configuration->Global Information

Configuration->BSS Function Handover Control], Set “BSC intracell handover enable” to

be “not allowed”.



Figure 6-11 Basic Handover Turn Off Parameters 1

GUI: [Managed Element->GSM Logical Configuration->Cell Information

Configuration->Handover Control], Set” Allow intra-Cell handover attempt due to uplink

interference(Low Speed)”to be “No”, Set” Allow intra-Cell handover attempt due to

downlink interference(Low Speed)”to be “No”


GUI: [Managed Element->GSM Logical Configuration->Cell Information



Speed)/ Allow level handover in downlink(Low Speed)” to be “No”.




6.5 Network Impact

1. Impact on network

After this feature is enabled, subscriber can make conversation on movement between

different cells, so network quality is improved and subscriber perception is enhanced.

To apply this feature, you should note the following issues:

Adjacent cell layer and static priority can control the handover direction.

The introduction of dynamic priority can automatically adjust the traffic distribution in

the network to relieve the network congestion.

Failure penalty policy can reduce the number of cell failures in a target cell, to

improve the network handover success rate. It is recommended that penalty period

of handover failure should be set to 10-15s.

The layer is a logic layer, irrespective of actual site type (macro site or micro site).

Layer setting may impact the priority selection of target cell during handover. The

priority of layer is higher than static or dynamic priority.

2. Impact on network elements

No impact on the capacity of BSC and BTS after this feature is enabled.



7 Abbreviation Abbreviations Full Characteristics

BSC Base Station Controller

BTS Base Transceiver Station

DL Down Link

DTX Discontinuous Transmission

GSM Global System for Mobile communications

MS/UE Mobile Station/User Equipment

MSC Mobile Switching Center

PBGT Power Budget

TA Timing Advance

UL Up Link

8 Reference Document

ZXG10 iBSC (V6.30.10) Base Station Controller Performance Counter Reference

ZXG10 iBSC (V6.30.10) Base Station Controller Radio Parameter Reference

ZGO-02-02-001 Handover between Macro- and Micro-cells

ZGO-02-02-002 Dynamic Handover Priority Algorithm

ZGO-02-02-003 Directed-Shift Handover

ZGO-02-02-007 Traffic Based Handover

ZGO-05-02-008 Multi-layer Cell Structure

ZGO-05-02-009 Concentric Circle Technology

ZGO-04-02-005 Co-BCCH

Documents

ZGB-02!02!001 Basic Handover Feature Guide ZXG10-IBSC (V12.2.0)20130314