GSM BSS
1.2 MHz Networking for BCCH TRXs
Feature Parameter Description
Issue
01
Date
2022-03-08
HUAWEI TECHNOLOGIES CO., LTD.
Copyright © Huawei Technologies Co., Ltd. 2022. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior
written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions
and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
The purchased products, services and features are stipulated by the contract made between Huawei and
the customer. All or part of the products, services and features described in this document may not be
within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements,
information, and recommendations in this document are provided "AS IS" without warranties, guarantees
or representations of any kind, either express or implied.
The information in this document is subject to change without notice. Every effort has been made in the
preparation of this document to ensure accuracy of the contents, but all statements, information, and
recommendations in this document do not constitute a warranty of any kind, express or implied.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
https://www.huawei.com
Email:
support@huawei.com
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
i
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
Contents
Contents
1 Change History.........................................................................................................................1
1.1 GBSS24.1 01(2022-03-08).................................................................................................................................................... 1
1.2 GBSS24.1 Draft A (2021-12-30)......................................................................................................................................... 1
2 About This Document.............................................................................................................2
2.1 General Statements................................................................................................................................................................ 2
2.2 Applicable RAT......................................................................................................................................................................... 3
2.3 Features in This Document.................................................................................................................................................. 3
3 Overview....................................................................................................................................4
4 1.2 MHz Networking for BCCH TRXs.................................................................................. 6
4.1 Principles.................................................................................................................................................................................... 6
4.1.1 BTS Grouping and Timeslot Staggering....................................................................................................................... 6
4.1.2 Intelligent BCCH Timeslot Assignment........................................................................................................................ 7
4.2 Network Analysis..................................................................................................................................................................... 8
4.2.1 Benefits.................................................................................................................................................................................... 9
4.2.2 Impacts.................................................................................................................................................................................... 9
4.3 Requirements......................................................................................................................................................................... 16
4.3.1 Licenses................................................................................................................................................................................. 16
4.3.2 Software................................................................................................................................................................................16
4.3.3 Hardware.............................................................................................................................................................................. 19
4.3.4 Networking.......................................................................................................................................................................... 20
4.3.5 Others.................................................................................................................................................................................... 20
4.4 Operation and Maintenance............................................................................................................................................. 21
4.4.1 When to Use....................................................................................................................................................................... 21
4.4.2 Data Configuration........................................................................................................................................................... 24
4.4.2.1 Data Preparation............................................................................................................................................................ 24
4.4.2.2 Using MML Commands............................................................................................................................................... 27
4.4.2.3 Using the MAE-Deployment...................................................................................................................................... 28
4.4.3 Activation Verification..................................................................................................................................................... 28
4.4.4 Network Monitoring......................................................................................................................................................... 28
5 Parameter................................................................................................................................29
6 Counters.................................................................................................................................. 30
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
ii
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
Contents
7 Glossary................................................................................................................................... 31
8 Reference Documents...........................................................................................................32
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
iii
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
1 Change History
1
Change History
This chapter describes changes not included in the "Parameters", "Counters",
"Glossary", and "Reference Documents" chapters. These changes include:
●
Technical changes
Changes in functions and their corresponding parameters
●
Editorial changes
Improvements or revisions to the documentation
1.1 GBSS24.1 01(2022-03-08)
This issue does not include any changes.
1.2 GBSS24.1 Draft A (2021-12-30)
Compared with Issue 02 (2021-04-30) of GBSS23.1, this issue includes the
following changes.
Technical Changes
None
Editorial Changes
Revised descriptions in 4.4.2.3 Using the MAE-Deployment.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
1
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
2 About This Document
2
About This Document
This document describes the GBFD-200201 1.2 MHz Networking for BCCH TRXs
feature, including its technical principles, related features, network impact, and
engineering guidelines.
2.1 General Statements
Purpose
Feature Parameter Description documents are intended to acquaint readers with:
●
The technical principles of features and their related parameters
●
The scenarios where these features are used, the benefits they provide, and
the impact they have on networks and functions
●
Requirements of the operating environment that must be met before feature
activation
●
Parameter configuration required for feature activation, verification of feature
activation, and monitoring of feature performance
NOTE
This document only provides guidance for feature activation. Feature deployment and
feature gains depend on the specifics of the network scenario where the feature is
deployed. To achieve optimal gains, contact Huawei professional service engineers.
The product supports only the functions mentioned in this document, and the
functions can be enabled only in the specified scenarios. If a function not mentioned
in this document is enabled or a function is enabled in an unspecified scenario,
exceptions or other impacts may occur.
Software Interfaces
Any parameters, alarms, counters, or managed objects (MOs) described in Feature
Parameter Description documents apply only to the corresponding software
release. For future software releases, refer to the corresponding updated product
documentation.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
2
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
2 About This Document
2.2 Applicable RAT
This document applies to GSM.
2.3 Features in This Document
This document describes the following GSM features.
Feature ID
Feature Name
Chapter/Section
GBFD-20020
1
1.2 MHz Networking for
BCCH TRXs
4 1.2 MHz Networking for BCCH
TRXs
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
3
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
3 Overview
3
Overview
Expansion of mobile services and increased spectrum refarming have been placing
ever more strain on GSM spectrum. Tighter BCCH frequency reuse patterns have
been creating additional interference on the BCCH TRX, and this interference
affects user access for voice services.
On traditional GSM networks, the BCCH frequency reuse pattern is 4x3. This
feature is developed for operators with insufficient spectrum resources and helps
them achieve 2x3 BCCH frequency reuse on the basis of Um-interface
synchronization. After the BCCH frequency reuse is changed from 4x3 to 2x3, the
BCCH frequency bandwidth decreases from 2.4 MHz to 1.2 MHz, the reuse
distance is shortened, and the uplink and downlink interference increases
significantly, as shown in Figure 3-1.
Figure 3-1 1.2 MHz Networking for BCCH TRXs
However, this feature and its prerequisite features use the interference suppression
techniques listed below to improve BCCH TRX performance. When these
techniques are used, a 2x3 reuse pattern can deliver nearly the same signal quality
as 4x3.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
4
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
3 Overview
●
Uplink interference suppression: The channels with the least interference are
scheduled based on timeslots to reduce uplink interference. Besides, this
technology helps eliminate interference using the interference cancellation
combining (ICC) algorithm based on interference detection and estimation.
●
Downlink interference suppression: BCCH timeslots are staggered so that the
downlink transmit power of timeslot 0 on the BCCH TRX is reduced to
increase the immediate assignment success rate. If the downlink receive
quality becomes poor, this technique helps reduce the downlink transmit
power of the interference source and boost the transmit power of desired
signals. This process increases the downlink carrier-to-interference ratio. For
AMR services, this technique reduces the downlink transmit power without
decreasing the voice encoding rate. This way, network interference is lowered
and network performance is improved.
This feature divides BTSs into groups A and B on a synchronous network.
Timeslots of BCCH TRXs between the two groups have a difference of four
timeslots. In addition, this feature uses specific channel allocation algorithms to
improve uplink and downlink performance.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
5
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4
4 1.2 MHz Networking for BCCH TRXs
1.2 MHz Networking for BCCH TRXs
4.1 Principles
4.1.1 BTS Grouping and Timeslot Staggering
This feature divides BTSs into two groups (A and B) based on Um-interface
synchronization. In the following example, the BCCH TRXs use the 2x3 frequency
reuse pattern, as shown in Figure 4-1.
Figure 4-1 BTS grouping – groups A and B
The BCCH TRXs of cells in groups A and B are synchronized such that they have a
difference of four timeslots. Specifically, timeslots 0 and 4 of group-A cells are
aligned respectively with timeslots 4 and 0 of group-B cells. This feature decreases
the transmit power of timeslots 4 on the downlink to improve downlink
performance of timeslots 0 of the BCCH TRX, improving the service access success
rate.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
6
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
You can set the BTS.TSOFFSETGRP parameter to divide BTSs into groups A and B.
Timeslot offsets are respectively set to 0 and 4 for group A (BTS.TSOFFSETGRP is
set to GroupA) and group B (BTS.TSOFFSETGRP is set to GroupB). There is a
difference of four timeslots between groups A and B. Timeslot 0 of group A is
aligned with timeslot 4 of group B, and timeslot 0 of group B is aligned with
timeslot 4 of group A, as shown in Figure 4-2.
Figure 4-2 Timeslot alignment
NOTE
If attributes of groups A and B are modified (for example, the value of BTS.TSOFFSETGRP
is changed from NoGroup or GroupA to GroupB, or changed from GroupB to NoGroup or
GroupA), call drops will occur. It is recommended that you modify group attributes when
traffic is light.
4.1.2 Intelligent BCCH Timeslot Assignment
The Intelligent BCCH Timeslot Assignment function optimizes channel allocation
for the BCCH TRX, improving spectral efficiency and network quality.
When GCELLCHMGAD.BCCHTRXTSIntlAllocateSw is set to ON, this function is
enabled. Channel priorities are allocated to groups A and B based on rules
illustrated in Figure 4-3, in an attempt to ensure that timeslot 4 aligned with
timeslot 0 of the BCCH TRX is idle. This function can be used with the IBIS feature
to improve the downlink BCCH TRX performance.
Figure 4-3 Channel group priorities
Timeslot 4 is allocated the lowest priority and its downlink transmit power can be
reduced to improve BCCH performance. You can set the
GCELLCHMGAD.BCCHTS4PwrDecrThld parameter to adjust the timeslot 4
transmit power decreases.
NOTE
Timeslot 4 is allowed to carry calls only with a high receive level after timeslot 4 transmit
power is decreased. Calls with downlink receive level lower than the value of
GCELLCHMGAD.ChAllcSoftBlockCallLevThld are not allocated timeslot 4 of the BCCH
TRX. In this case, the value of S3019B:Number of Level-caused Soft Blocks During BCCH
TRX Channel Allocation is increased by 1.
When GCELLCHMGAD.BCCHTRXPrefAllocateTCHHSw is set to ON, the BSC
preferentially allocates TCH/Hs to BCCH TRXs.
The GCELLCHMGAD.ChAllcSoftBlockCapThld parameter is used to control traffic
carried by the BCCH TRX. If the BCCH TRX channel usage is greater than or equal
to the value of GCELLCHMGAD.ChAllcSoftBlockCapThld, the BSC performs soft
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
7
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
block on newly accessed calls. In this case, the value of S3019A:Number of
Capacity-caused Soft Blocks During BCCH TRX Channel Allocation is increased by
1.
When the GCELLCHMGAD.ChanGroupAdjustSw parameter is set to ON, the BSC
periodically triggers intra-cell inter-channel group handovers from a low-priority
channel group to a high-priority channel group to reduce interference on the same
timeslot of different groups. When GCELLCHMGAD.ChanGroupAdjustOptSw is
set to ON(On):
●
In concentric cell scenarios, a call can be handed over only to a higher-priority
channel group in an equivalent-level subcell. Specifically, a call of an
underlaid subcell and a call of an overlaid subcell can be respectively handed
over only to a higher-priority channel group in an underlaid subcell and an
overlaid subcell. Handovers between underlaid and overlaid subcells are
controlled by the underlaid and overlaid subcell handover algorithm. For
details, see Concentric Cell in GBSS Feature Documentation.
●
The BSC needs to determine MS-supported frequency bands before interchannel group handovers are triggered, because this function applies only to
channel groups corresponding to these frequency bands.
●
For a call on which intra-cell handovers are performed due to poor signal
quality, inter-channel group handovers cannot be triggered for the call before
it is released, preventing ping-pong handovers.
Users can specify the priority policy of non-BCCH TRX channels using the
GCELLCHMGAD.NonBCCHTRXChAllcPriPolicy parameter to control priorities of
non-BCCH and BCCH TRX channels.
When GCELLCHMGAD.NonBCCHTRXChAllcPriPolicy is set to STRATEGY1, the
channel group priorities shown in Figure 4-3 are used. Setting the priority policy
for TCH TRX channel allocation increases the probability that the interfering
timeslot of the BCCH TRX is in the idle state, improving gains delivered by IBIS and
the interference source-based precise power control function in the User-level
Precise Power Control feature.
GCELLCHMGAD.BCCHTRXInterfOptPolicy specifies the BCCH TRX interference
optimization policy. When this parameter is set to STRATEGY1, the downlink
power decrease of frames on the BCCH TRX where IBIS takes effect is the common
power control value and does not exceed 3 dB. When this parameter is set to
STRATEGY2, the BSC does not optimize interference in downlink transmit signals
of the BCCH TRX.
For cells experiencing congestion, set GCELLCHMGAD.ChAllcSoftBlockCapThld to
100 and set GCELLCHMGAD.BCCHTRXTSAllocateOptSw to ON(on) to enable
the optimized timeslot allocation function for the BCCH TRX. If the number of idle
TCHs on the BCCH TRX is less than or equal to the value of
GCELLCHMGAD.BCCHTRXIdleChnlNumber, the BSC preferentially allocates
timeslot 4 to the calls with a downlink receive level of greater than or equal to the
value of GCELLCHMGAD.ChAllcSoftBlockCallLevThld. This helps prevent call
drops caused by allocation of timeslot 4 to calls with low levels.
4.2 Network Analysis
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
8
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
4.2.1 Benefits
This feature improves BCCH spectral efficiency by 50%. It reduces the GSM BCCH
frequency bandwidth from the traditional 2.4 MHz to 1.2 MHz, and the increased
spectral efficiency means that less money is spent on spectrum resources and
network value is maximized.
In GU/GL refarming and GU@5MHz scenarios, this feature frees up spectrum
resources for customers to deploy UMTS or LTE networks, improving user
experience.
4.2.2 Impacts
Network Impacts
●
System capacity
BCCH TRX capacity is the same as that of the 2.4 MHz networking for BCCH
TRXs.
●
Network performance
The impact of this solution on network performance varies with network
scenarios before solution deployment. The following table describes the
network performance impact (based on the evaluation baseline) in S111@1.2
MHz networking in comparison with that in S111@2.4 MHz networking when
this feature is used.
Table 4-1 Network performance impacts in S111@1.2 MHz networking in
comparison with that in S111@2.4 MHz networking
Item
Evaluation Baseline
Impact on Network
Performance
MOS
About 3.2 points
0.1 to 0.3 points lower
ZTR304A: Call Drop
Rate on TCH per
cell(Excluding
Handover)
About 1%
0.2% to 0.3% higher
HQI
Uplink HQI (0 to 5) of
about 98%
0.3% to 0.6% lower
Downlink HQI (0 to 5)
of about 98%
0.6% to 0.9% lower
About 98%
0.6% to 1.2% lower
RH303A: Success Rate
of Radio Handover
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
9
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Item
Evaluation Baseline
Impact on Network
Performance
AR9780: Average CPU
Usage of the XPU
Load before
deployment
● The interference
source-based precise
power control
function for SDCCH
is disabled: increased
by up to 3%
● The interference
source-based precise
power control
function for SDCCH
is enabled: increased
by up to 5%
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
10
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
CAUTION
● Worse KPIs of the original network lead to a greater impact on network
performance. Better KPIs of the original network lead to a smaller impact
on network performance. The preceding network performance impact is
evaluated based on the evaluation baseline. The KPIs of most sites on the
live network are better than the baseline. Therefore, the actual network
impact is less than the network impact described in this table and must be
evaluated based on live-network conditions.
● In-depth network optimization improves network performance to an
extent that KPIs in S111@1.2 MHz networking are virtually the same as
those in S111@2.4 MHz networking (the call drop rate changes within
0.1%).
● This feature depends on inter-BTS time synchronization. A synchronization
failure between BTSs as a result of GPS antenna faults, transmission faults,
and BTS restarting causes the KPIs to further deteriorate from the values
listed in the above table. When the Soft-Synchronized Network feature is
also enabled, a synchronization failure between BTSs requires a longer
time for the BTSs to restore the synchronization state, having a greater
impact on network performance. It is likely that the immediate assignment
success rate further decreases by 0.4% to 0.6%, the call drop rate increases
by 0.3% to 0.5%, and the uplink and downlink HQIs decrease by 0.6% to
1%.
● If some prerequisite features have been enabled before S111@1.2 MHz is
deployed, impacts on network performance after feature deployment are
greater than those provided in the preceding table.
● During deployment, after 1.2 MHz Networking for BCCH TRXs is enabled,
the immediate assignment success rate may be higher than that on the
original network. An increased immediate assignment success rate allows
more MSs to access the network, increasing network traffic. Most of the
new users are very annoyed persons (VAPs), causing other KPIs, such as
the assignment success rate, call drop rate, HQI, and handover success
rate, to deteriorate, which may exceed the specifications in the preceding
table.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
11
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Impacted Functions
RAT
Function
Name
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
GSM
TRX Power
Amplifier
Intelligent
Shutdown
BSCDSTPA.BSC
DynSwitchTrxP
AAllow
Intelligent Power
Consumption
Decrease
When this
function and
1.2 MHz
Networking
for BCCH
TRXs are
enabled at
the same
time, gains
brought by
TRX Power
Amplifier
Intelligent
Shutdown
decrease.
GSM
IBCA
GCELLCHMGAD
.IBCAALLOWED
IBCA
When BCCH
TRXs use the
2x3 frequency
reuse pattern,
enabling this
function
reduces the
gains brought
by IBCAa.
GSM
IBCA II
GCELLIBCAII.IB
IBCA II
When BCCH
TRXs use the
2x3 frequency
reuse pattern,
enabling this
function
reduces the
gains brought
by IBCA IIa.
Issue 01 (2022-03-08)
CAIIAllowed
Copyright © Huawei Technologies Co., Ltd.
12
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
RAT
Function
Name
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
GSM
Uplink CoMP
(Joint RX)
GCELLBASICPA
RA.CoMPSwitch
Uplink CoMP
(Joint RX)
When this
function and
1.2 MHz
Networking
for BCCH
TRXs are
enabled at
the same
time, gains
brought by
uplink CoMP
decrease, but
the average
MOS can
increase by
0.05 to 0.1
pointsb.
GSM
TCHH
repacking
GCELLCHMGAD
.HALFRATEREP
Dynamic Channel
Conversion
This function
and the
channel
group
handover
function in
the 1.2 MHz
Networking
for BCCH
TRXs feature
interfere with
each other,
which is likely
to cause pingpong
handovers. It
is
recommended
that the two
functions be
not enabled
at the same
time.
Issue 01 (2022-03-08)
ACKINGSWITC
H
Copyright © Huawei Technologies Co., Ltd.
13
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
RAT
Function
Name
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
GSM
AMR FR/HR
Dynamic
Adjustment
GCELLHOBASIC.
Handover
This function
and the
channel
group
handover
function in
the 1.2 MHz
Networking
for BCCH
TRXs feature
interfere with
each other,
which is likely
to cause pingpong
handovers. It
is
recommended
that the two
functions be
not enabled
at the same
time.
GSM
Enhanced
BCCH Power
Consumption
Optimization
GBTS:
GCELLOTHEXT.
Enhanced BCCH
Power
Consumption
Optimization
If 1.2 MHz
Networking
for BCCH
TRXs is
enabled, the
Enhanced
BCCH Power
Consumption
Optimization
feature does
not take
effect on
timeslot 4.
INTRACELLFHH
OEN
MAINBCCHPW
RDTEN
eGBTS:
GLOCELLENERG
YMGTPARA.MAI
NBCCHPWRDTE
N
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
14
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
RAT
Function
Name
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
GSM
Co-BCCH Cell
GCELL.IUOTP
Co-BCCH Cell
When 1.2
MHz
Networking
for BCCH
TRXs is
enabled, the
priority of
channel
allocation to
the BCCH TRX
is lowered
and the
probability of
channel
allocation to
the overlaid
subcell
increases,
possibly
increasing the
call drop rate
and
decreasing
the HQI.
GSM
Multiple
CCCHs
GTRXCHAN.CH
TYPE
Radio Resource
Management
GSM
Dynamic
Multiple CCCH
GCELLCCCH.Dy
Dynamic Channel
Conversion
If 1.2 MHz
Networking
for BCCH
TRXs is
enabled, the
transmit
power of
timeslot 4 on
the BCCH TRX
will be
decreased.
You are not
advised to
configure the
BCH on
timeslot 4.
Issue 01 (2022-03-08)
nCCCHSwitch
Copyright © Huawei Technologies Co., Ltd.
15
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
RAT
Function
Name
4 1.2 MHz Networking for BCCH TRXs
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
a: When BCCH TRXs use the 2x3 frequency reuse pattern, there is a higher
probability that interfering neighboring cell information in MRs is not reported
to the BSC. When this occurs, the IBCA/IBCA II feature evaluates channels less
accurately, reducing the gains brought by IBCA/IBCA II.
b: Uplink CoMP (Joint RX) does not support coordination between group A and
group B, which is likely to deliver smaller gains when 1.2 MHz Networking for
BCCH TRXs is also enabled. However, the average MOS increases by 0.05 to 0.1
points. Therefore, it is recommended that the two functions be enabled at the
same time when the uplink voice quality needs to be improved.
4.3 Requirements
4.3.1 Licenses
RAT
Feature ID
Feature
Name
License
Control Item
ID
NE
Sales
Unit
GSM
GBFD-200201
1.2 MHz
Networking
for BCCH
TRXs
LGMI12MNBT
BSC6900
Per Cell
BSC6910
4.3.2 Software
Before activating this function, ensure that its prerequisite functions have been
activated and mutually exclusive functions have been deactivated. For detailed
operations, see the relevant feature documents.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
16
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Prerequisite Functions
RAT
Function
Name
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
GSM
BTS GPS
Synchronizatio
n
GBTS:
BTSCLK.ClkType
and
BTSOTHPARA.S
BTS GNSS
Synchronization
1.2 MHz
Networking
for BCCH
TRXs requires
any of these
features.
YNCMETHOD
eGBTS:
TASM.CLKSRC
and
BTSOTHPARA.S
YNCMETHOD
GSM
Clock over IP
Support
1588V2
None
Synchronization
GSM
BTS Support
1588v2 ATR
None
Synchronization
GSM
SoftSynchronized
Network
GBTS:
BTSOTHPARA.S
Soft-Synchronized
Network
YNCMETHOD
and
BTSOTHPARA.A
ISSOP
NOTE
If
GBFD-118620
Clock over IP
Support
1588V2 is
enabled, this
solution
requires only
time
synchronizatio
n of the
feature.
eGBTS:
BTSOTHPARA.S
YNCMETHOD
and TASM.FLAG
GSM
Issue 01 (2022-03-08)
User-level
Precise Power
Control
GCELLPWRBASI
C.UsrLevPrecise
PCSw
User-level Precise
Power Control
Copyright © Huawei Technologies Co., Ltd.
User-level
Precise Power
Control
reduces
downlink
transmit
power of the
interference
source and
improves the
downlink
voice qualitya.
17
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
RAT
Function
Name
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
GSM
Intelligent
BCCH
Interference
Suppression
(IBIS)
GCELLOTHPAR
A.BCCHIntfSupS
Intelligent BCCH
Interference
Suppression (IBIS)
Intelligent
BCCH
Interference
Suppression
(IBIS) reduces
BCCH TRX
downlink
interferenceb.
GSM
MICC
GCELLBASICPA
RA.MiccSwitch
Interference
Cancellation
Combining
MICC
improves the
uplink HQI. If
this function
is not
enabled, the
uplink HQI of
the BCCH TRX
will be 15%
to 30% worse
than that
when 2.4
MHz
networking
for BCCH
TRXs is used.
GSM
Handover Reestablishment
GCELLSOFT.ACT
Handover Reestablishment
Handover Reestablishment
increases the
handover
success rate.
If this
function is
not enabled,
the BCCH TRX
handover
success rate is
10% to 20%
lower than
that when 2.4
MHz
networking
for BCCH
TRXs is used.
Issue 01 (2022-03-08)
w
L2REEST
Copyright © Huawei Technologies Co., Ltd.
18
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
RAT
Function
Name
4 1.2 MHz Networking for BCCH TRXs
Function
Switch
Reference (GBSS
Feature
Documentation)
Description
a: If User-level Precise Power Control is not enabled, compared with the cases in
2.4 MHz networking for BCCH TRXs, the downlink HQI of the BCCH TRX will be
25% to 50% worse and the BCCH TRX call drop rate will be 10% to 30% higher.
b: If Intelligent BCCH Interference Suppression (IBIS) is not enabled, compared
with the cases in 2.4 MHz networking for BCCH TRXs, the downlink HQI of the
BCCH TRX will be 10% to 20% worse.
Mutually Exclusive Functions
RAT
Function Name
Function Switch
Reference (GBSS
Feature
Documentation)
GSM
BCCH Carrier
Frequency Hopping
GTRXHOP.HOPTYPE
Frequency Hopping
GSM
BSC Node
Redundancy
GNODEREDUNDANCY
.RedundancyMode
BSC Node
Redundancy
GSM
Multi-site Cell
GBTS:
BTSLOCGRP.ISMAINL
Multi-site Cell
OCGRP
eGBTS:
GLOCELL.LOCELLTYPE
GSM
GCELL.EXTTP
Extended Cell
None
4.3.3 Hardware
Base Station Models
Table 4-2 NEs supporting the feature
Feature
Name
BSC6900
BSC6910
GBTS
eGBTS
1.2 MHz
Networking
for BCCH
TRXs
√
√
√
√
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
19
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
NOTE
● √ indicates that the NE supports this feature. × indicates that the NE does not support
this feature.
● Only 3900 series base stations (excluding the BTS3900B and BTS3900E) and 5900 series
base stations support this feature.
● This feature does not support co-site scenarios.
Boards
If GPS-based synchronization is used, the BTS must be equipped with the main
control board configured with a GPS satellite card or USCU board.
For the eGBTS, the main control board supports only the UMPT board.
For the GBTS, the main control board supports only the GTMUb or GTMUc board.
RF Modules
Only the following RF modules do not support this feature:
DRFU/GRFU/MRFU V1/MRFU V2/MRFU V2a/MRFUd/MRFUe/RRU3004/RRU3008/
RRU3908/RRU3926/RRU3928/RRU3929/RRU3936/RRU3938/RRU3939/RRU3942/
RRU3961/AAU3902/AAU3910/AAU3911
4.3.4 Networking
●
If the wireless network is asynchronous, reconstruct the network into a
synchronous network before enabling this feature.
●
Enabling this feature requires configuration of BTS group attributes (specified
by the BTS.TSOFFSETGRP parameter). Before this feature is enabled, divide
BTSs into groups A and B, and place those with large BCCH TRX interference
in different groups based on the BCCH frequency and interference matrix.
NOTE
Groups A and B must be replanned if the BCCH frequency is changed, because they are
planned based on the BCCH frequency.
4.3.5 Others
Enabling this feature creates severe interference on the BCCH TRX. You are advised
to limit the number of SDCCHs and PDCHs on the BCCH TRX to improve
performance for voice services. However, doing so adversely impacts service
performance. The following are SDCCH and PDCH configuration
recommendations:
●
●
Issue 01 (2022-03-08)
Recommendations for configuring SDCCHs
–
If only one TRX is configured in a cell, preferentially configure the TRX so
that it works in combined BCCH mode. If the TRX cannot be configured
to work in this mode, configure the SDCCH on timeslot 1.
–
If more than one TRX is configured in the cell, configure the SDCCH on a
TCH TRX.
Recommendations for configuring PDCHs
Copyright © Huawei Technologies Co., Ltd.
20
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Configure one static PDCH on the BCCH TRX and set
GTRXBASE.MAXPDCHNUM of this TRX to 2.
–
For cells under BTSs whose BTS.TSOFFSETGRP is set to GroupA,
configure the PDCH of the BCCH TRX on timeslot 7.
–
For cells under BTSs whose BTS.TSOFFSETGRP is set to GroupB,
configure the PDCH of the BCCH TRX on timeslot 2.
4.4 Operation and Maintenance
4.4.1 When to Use
Recommended Application Scenarios
It is recommended that this feature be enabled when BCCH TRXs use the 2x3
frequency reuse pattern.
Required Information
Before deploying this feature, collect the following information:
Information to Be Collected
Objective
Engineering parametersa, such as the
cell name, longitude and latitude,
azimuth, BTS type, and MA, for cells
Analyze network topology and plan BTS
grouping.
Latest BSC configuration files in
these cells
Confirm engineering parameters and
plan groups A and B.
Raw performance counters and
historical data in 7 x 24 hours
Obtain the performance counters and
operating status of the original network
for subsequent comparison after 1.2
MHz Networking for BCCH TRXs is
deployed.
TRX receive quality performance
counters and historical data in 7 x 24
hours
Obtain the value of RxQuality for
subsequent value comparison after 1.2
MHz Networking for BCCH TRXs is
deployed.
Performance counters related to the
interference matrixb of the original
network in 7 x 24 hours
Plan groups A and B.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
21
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
Information to Be Collected
4 1.2 MHz Networking for BCCH TRXs
Objective
a: Check the engineering parameters of these cells against the latest
configuration file to confirm that these parameters are complete and correct. If
they are not, rectify them based on the configuration file. If time permits, pay
site visit to check whether the longitudes, latitudes, and azimuths of the BTSs
are correct. If the GPS is installed and works properly, directly obtain the
longitudes and latitudes from the GPS.
b: Obtain the interference matrix of cells in the target deployment area to
facilitate group A and B planning. BTSs must be divided into groups A and B
during feature activation.
Before deploying 1.2 MHz Networking for BCCH TRXs, collect the counters listed in
Table 4-3 to evaluate GSM network performance changes brought by this feature.
Table 4-3 Required performance counters
Counter Name
Counter Description
TRX.FR.DOWN.RX.QLTY.0.NEW
NCS412A: Number of MRs on
Downlink TCHF (Receive Quality Rank
0)
TRX.FR.DOWN.RX.QLTY.1.NEW
NCS412B: Number of MRs on
Downlink TCHF (Receive Quality Rank
1)
TRX.FR.DOWN.RX.QLTY.2.NEW
NCS412C: Number of MRs on
Downlink TCHF (Receive Quality Rank
2)
TRX.FR.DOWN.RX.QLTY.3.NEW
NCS412D: Number of MRs on
Downlink TCHF (Receive Quality Rank
3)
TRX.FR.DOWN.RX.QLTY.4.NEW
NCS412E: Number of MRs on
Downlink TCHF (Receive Quality Rank
4)
TRX.FR.DOWN.RX.QLTY.5.NEW
NCS412F: Number of MRs on
Downlink TCHF (Receive Quality Rank
5)
TRX.FR.DOWN.RX.QLTY.6.NEW
NCS412G: Number of MRs on
Downlink TCHF (Receive Quality Rank
6)
TRX.FR.DOWN.RX.QLTY.7.NEW
NCS412H: Number of MRs on
Downlink TCHF (Receive Quality Rank
7)
TRX.FR.UP.RX.QLTY.0.NEW
NCS413A: Number of MRs on Uplink
TCHF (Receive Quality Rank 0)
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
22
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Counter Name
Counter Description
TRX.FR.UP.RX.QLTY.1.NEW
NCS413B: Number of MRs on Uplink
TCHF (Receive Quality Rank 1)
TRX.FR.UP.RX.QLTY.2.NEW
NCS413C: Number of MRs on Uplink
TCHF (Receive Quality Rank 2)
TRX.FR.UP.RX.QLTY.3.NEW
NCS413D: Number of MRs on Uplink
TCHF (Receive Quality Rank 3)
TRX.FR.UP.RX.QLTY.4.NEW
NCS413E: Number of MRs on Uplink
TCHF (Receive Quality Rank 4)
TRX.FR.UP.RX.QLTY.5.NEW
NCS413F: Number of MRs on Uplink
TCHF (Receive Quality Rank 5)
TRX.FR.UP.RX.QLTY.6.NEW
NCS413G: Number of MRs on Uplink
TCHF (Receive Quality Rank 6)
TRX.FR.UP.RX.QLTY.7.NEW
NCS413H: Number of MRs on Uplink
TCHF (Receive Quality Rank 7)
TRX.HR.DOWN.RX.QLTY.0.NEW
NCS414A: Number of MRs on
Downlink TCHH (Receive Quality Rank
0)
TRX.HR.DOWN.RX.QLTY.1.NEW
NCS414B: Number of MRs on
Downlink TCHH (Receive Quality Rank
1)
TRX.HR.DOWN.RX.QLTY.2.NEW
NCS414C: Number of MRs on
Downlink TCHH (Receive Quality Rank
2)
TRX.HR.DOWN.RX.QLTY.3.NEW
NCS414D: Number of MRs on
Downlink TCHH (Receive Quality Rank
3)
TRX.HR.DOWN.RX.QLTY.4.NEW
NCS414E: Number of MRs on
Downlink TCHH (Receive Quality Rank
4)
TRX.HR.DOWN.RX.QLTY.5.NEW
NCS414F: Number of MRs on
Downlink TCHH (Receive Quality Rank
5)
TRX.HR.DOWN.RX.QLTY.6.NEW
NCS414G: Number of MRs on
Downlink TCHH (Receive Quality Rank
6)
TRX.HR.DOWN.RX.QLTY.7.NEW
NCS414H: Number of MRs on
Downlink TCHH (Receive Quality Rank
7)
TRX.HR.UP.RX.QLTY.0.NEW
NCS415A: Number of MRs on Uplink
TCHH (Receive Quality Rank 0)
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
23
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Counter Name
Counter Description
TRX.HR.UP.RX.QLTY.1.NEW
NCS415B: Number of MRs on Uplink
TCHH (Receive Quality Rank 1)
TRX.HR.UP.RX.QLTY.2.NEW
NCS415C: Number of MRs on Uplink
TCHH (Receive Quality Rank 2)
TRX.HR.UP.RX.QLTY.3.NEW
NCS415D: Number of MRs on Uplink
TCHH (Receive Quality Rank 3)
TRX.HR.UP.RX.QLTY.4.NEW
NCS415E: Number of MRs on Uplink
TCHH (Receive Quality Rank 4)
TRX.HR.UP.RX.QLTY.5.NEW
NCS415F: Number of MRs on Uplink
TCHH (Receive Quality Rank 5)
TRX.HR.UP.RX.QLTY.6.NEW
NCS415G: Number of MRs on Uplink
TCHH (Receive Quality Rank 6)
TRX.HR.UP.RX.QLTY.7.NEW
NCS415H: Number of MRs on Uplink
TCHH (Receive Quality Rank 7)
CELL.RATE.TCH.CALL.DROP.EXCLUDE.
HO
ZTR304A: Call Drop Rate on TCH per
cell(Excluding Handover)
CELL.RD.HO.SUCC.RATE
RH303A: Success Rate of Radio
Handover
CELL.KPI.TCH.TRAF.ERL.TRAF
K3014: Traffic Volume on TCH
CELL.BCCH.TRX.CH.ALLOC.Cap.SOFT
BLK.NUM
S3019A: Number of Capacity-caused
Soft Blocks During BCCH TRX Channel
Allocation
CELL.BCCH.TRX.CH.ALLOC.LEV.SOFTB
LK.NUM
S3019B: Number of Level-caused Soft
Blocks During BCCH TRX Channel
Allocation
4.4.2 Data Configuration
4.4.2.1 Data Preparation
Table 4-4 describes the parameters used for function activation and optimization.
Table 4-4 Parameters used for activation and optimization
Parameter
Name
Parameter ID
Setting Notes
Channel No.
GTRXCHAN.CHNO
Channel Type
GTRXCHAN.CHTYPE
Set these parameters based on
planning results in 4.3.5 Others.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
24
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Parameter
Name
Parameter ID
Setting Notes
Maximum
Number of
PDCH
GTRXBASE.MAXPDCH
PDCH Channel
Priority Type
GTRXCHAN.GPRSCHP
RI
Channel
Allocate
Strategy
GCELLCHMGBASIC.C
HALLOCSTRATEGY
Set this parameter to
CAPABILITY(Capability preferred)
for hybrid cells and
QUALITY(Quality preferred) for
other cells.
Timeslot Offset
Group
BTS.TSOFFSETGRP
Set this parameter based on the
grouping plan.
BCCH TRX
Timeslot
Intelligent
Allocate Switch
GCELLCHMGAD.BCCH
Set this parameter to ON when
GSM BCCH TRXs use the 2x3
frequency reuse pattern.
GCELLCHMGAD.BCCH
TS4PwrDecrThld
It is recommended that the default
value be used when this feature is
enabled.
NUM
BCCH TS4
Power Decrease
Threshold
TRXTSIntlAllocateSw
When this feature is enabled, if the
network performance does not
meet the expectation, check
whether the immediate assignment
success rate is better than that of
networks before feature
deployment. If the immediate
assignment success rate is greater
than that before feature
deployment, you are advised to
decrease the value of this parameter
by a step of 2 dB. If the immediate
assignment success rate is less than
that before feature deployment, you
are advised to increase the value of
this parameter by a step of 2 dB.
Otherwise, do not adjust this
parameter.
Channel Group
Adjust Switch
GCELLCHMGAD.Chan
GroupAdjustSw
It is recommended that the default
value be used when this feature is
enabled.
After this feature is enabled,
parameter reconfiguration can be
performed, if needed, by referring to
the impact of this parameter on the
radio network performance.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
25
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Parameter
Name
Parameter ID
Setting Notes
Channel Group
Adjust Optimize
Switch
GCELLCHMGAD.Chan
It is recommended that the default
value be used when this feature is
enabled.
GroupAdjustOptSw
It is recommended that this
parameter be set to ON(On) only
when
GCELLCHMGAD.ChanGroupAdjust
OptSw is set to ON(On).
BCCH TRX
Prefer Allocate
TCHH Switch
GCELLCHMGAD.BCCH
TRXPrefAllocateTCH
HSw
It is recommended that the default
value be used when this feature is
enabled.
After this feature is enabled, if the
traffic volume on the BCCH TRX is
less than 1.5 Erlang and voice
service experience needs
improvement, set this parameter to
OFF(Off).
Channel
Allocate Soft
Block Capacity
Thld
GCELLCHMGAD.ChAll
Channel
Allocate Soft
Block Call Level
Thld
GCELLCHMGAD.ChAll
Retain the default value.
Non-BCCH TRX
Channel
Allocate Priority
Policy
GCELLCHMGAD.NonB
Retain the default value.
GCELLCHMGAD.BCCH
Retain the default value.
BCCH TRX
Interference
Optimize Policy
Issue 01 (2022-03-08)
cSoftBlockCapThld
It is recommended that the default
value be used when this feature is
enabled.
When this feature is enabled, if the
traffic is heavy on the network and
causes network congestion, you can
adjust the value of this parameter
to enable the BCCH TRX to carry
more traffic. A larger value of this
parameter leads to higher traffic
carried by the BCCH TRX.
cSoftBlockCallLevThl
d
CCHTRXChAllcPriPolicy
TRXInterfOptPolicy
Copyright © Huawei Technologies Co., Ltd.
26
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
Parameter
Name
Parameter ID
Setting Notes
BCCH TRX TS
Allocate
Optimize Switch
GCELLCHMGAD.BCCH
It is recommended that the default
value be used when this feature is
enabled.
TRXTSAllocateOptSw
It is recommended that this
parameter be set to ON(On) when
GCELLCHMGAD.ChAllcSoftBlockCapThld is set to 100.
Number of Idle
Channels on
BCCH TRX
GCELLCHMGAD.BCCH
TRXIdleChnlNumber
Retain the default value.
4.4.2.2 Using MML Commands
Activation Command Examples
//(Optional) Setting the channel type of timeslot 0 of the BCCH TRX:
SET GTRXCHAN: IDTYPE=BYID, TRXID=0, CHNO=0, CHTYPE=CBCCH;
SET GTRXCHAN: IDTYPE=BYID, TRXID=10, CHNO=0, CHTYPE=CBCCH;
//(Optional) Setting the maximum number of PDCHs on BCCH TRXs:
SET GTRXBASE: IDTYPE=BYID, TRXID=0, MAXPDCHNUM=2;
SET GTRXBASE: IDTYPE=BYID, TRXID=10, MAXPDCHNUM=2;
//(Optional) Setting PDCHs:
SET GTRXCHAN: IDTYPE=BYID, TRXID=0, CHNO=7, CHTYPE=PDTCH, GPRSCHPRI=EGPRSPRICH;
SET GTRXCHAN: IDTYPE=BYID, TRXID=10, CHNO=2, CHTYPE=PDTCH, GPRSCHPRI=EGPRSPRICH;
//Setting the channel allocation policies:
SET GCELLCHMGBASIC: IDTYPE=BYID, CELLID=0, CHALLOCSTRATEGY=QUALITY;
//Enabling the BTS grouping function and setting group attributes:
MOD BTS: IDTYPE=BYID, BTSID=0, TSOFFSETGRP=GroupA;
MOD BTS: IDTYPE=BYID, BTSID=1, TSOFFSETGRP=GroupB;
//Turning on the BCCH TRX timeslot intelligent allocation switch:
SET GCELLCHMGAD: IDTYPE=BYID, CELLID=0, BCCHTRXTSIntlAllocateSw=ON, ChAllcSoftBlockCapThld=70,
ChanGroupAdjustSw=OFF, BCCHTS4PwrDecrThld=6, ChAllcSoftBlockCallLevThld=35,
BCCHTRXPrefAllocateTCHHSw=ON, NonBCCHTRXChAllcPriPolicy=STRATEGY1,
BCCHTRXInterfOptPolicy=STRATEGY1;
SET GCELLCHMGAD: IDTYPE=BYID, CELLID=3, BCCHTRXTSIntlAllocateSw=ON, ChAllcSoftBlockCapThld=70,
ChanGroupAdjustSw=OFF, BCCHTS4PwrDecrThld=6, ChAllcSoftBlockCallLevThld=35,
BCCHTRXPrefAllocateTCHHSw=ON, NonBCCHTRXChAllcPriPolicy=STRATEGY1,
BCCHTRXInterfOptPolicy=STRATEGY1;
Optimization Command Examples
//Adjusting the BCCH TS4 power decrease threshold:
SET GCELLCHMGAD: IDTYPE=BYID, CELLID=0, BCCHTRXTSIntlAllocateSw=ON, BCCHTS4PwrDecrThld=4;
//Adjusting the channel allocation capacity soft block threshold:
SET GCELLCHMGAD: IDTYPE=BYID, CELLID=0, BCCHTRXTSIntlAllocateSw=ON,
BCCHTRXTSAllocateOptSw=ON, BCCHTRXIdleChnlNumber=4, ChAllcSoftBlockCapThld=100;
//Disabling the function of preferentially allocating TCHHs to BCCH TRXs
SET GCELLCHMGAD: IDTYPE=BYID, CELLID=0, BCCHTRXTSIntlAllocateSw=ON,
BCCHTRXPrefAllocateTCHHSw=OFF;
//Enabling the channel group handover function and the channel group handover optimization function
SET GCELLCHMGAD: IDTYPE=BYID, CELLID=0, BCCHTRXTSIntlAllocateSw=ON, ChanGroupAdjustSw=ON,
ChanGroupAdjustOptSw=ON;
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
27
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
4 1.2 MHz Networking for BCCH TRXs
4.4.2.3 Using the MAE-Deployment
●
Fast batch activation
This function can be batch activated using the Feature Operation and
Maintenance function of the MAE-Deployment. For detailed operations, see
the following section in the MAE-Deployment product documentation or
online help: MAE-Deployment Operation and Maintenance > MAEDeployment Guidelines > Enhanced Feature Management > Feature
Operation and Maintenance.
●
Single/Batch configuration
This function can be activated for a single NE or a batch of NEs on the MAEDeployment. For detailed operations, see Feature Configuration Using the
MAE-Deployment.
4.4.3 Activation Verification
eGBTS
On the BSC LMT, trace the LOGICAL CELL RECONFIGURATION message on the
CSL link over the Abis interface and double-click this message. If bcch-trx-ts-intlallocate-sw is displayed as open (as shown in Figure 4-4), this feature has taken
effect.
Figure 4-4 Activation verification for the eGBTS
GBTS
On the BSC LMT, trace the Set Cell Extend Attribute2 message through the OML
link over the Abis interface, and double-click this message. If bcchTrxTsIntlAlloSw
is 0x1 (as shown in Figure 4-5) this feature has taken effect.
Figure 4-5 Activation verification for the GBTS
4.4.4 Network Monitoring
Monitor the KPIs listed in Table 4-3 on the GSM side to check the changes after
the 1.2 MHz Networking for BCCH TRXs feature is enabled.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
28
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
5 Parameter
5
Parameter
There are no specific parameters associated with this feature in this RAT.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
29
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
6 Counters
6
Counters
There are no specific counters associated with this feature in this RAT.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
30
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
7 Glossary
7
Glossary
For the acronyms, abbreviations, terms, and definitions, see Glossary in GBSS
Feature Documentation.
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
31
GSM BSS
1.2 MHz Networking for BCCH TRXs Feature
Parameter Description
8 Reference Documents
8
Reference Documents
Feature parameter description documents in GBSS Feature Documentation
1.
Concentric Cell
2.
Intelligent Power Consumption Decrease
3.
IBCA
4.
IBCA II
5.
Uplink CoMP (Joint RX)
6.
Dynamic Channel Conversion
7.
GSM and LTE Coordinated Symbol Power Saving
8.
Handover
9.
Enhanced BCCH Power Consumption Optimization
10. Co-BCCH Cell
11. Radio Resource Management
12. Dynamic Channel Conversion
13. BTS GNSS Synchronization
14. Synchronization
15. Soft-Synchronized Network
16. User-level Precise Power Control
17. Intelligent BCCH Interference Suppression (IBIS)
18. Interference Cancellation Combining
19. Handover Re-establishment
20. Frequency Hopping
21. BSC Node Redundancy
22. Multi-site Cell
Issue 01 (2022-03-08)
Copyright © Huawei Technologies Co., Ltd.
32