GSM BSS

GBSS14.0

DTM Feature Parameter Description

Issue 02
Date 2012-08-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2012. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
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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.

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The information in this document is subject to change without notice. Every effort has been made in the
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Huawei Technologies Co., Ltd.

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GSM BSS
DTM Feature Parameter Description Contents

Contents

1 Introduction....................................................................................................................................1
1.1 Scope..................................................................................................................................................................1
1.2 Intended Audience..............................................................................................................................................1
1.3 Change History...................................................................................................................................................1

2 Overview.........................................................................................................................................3
3 Technical Description...................................................................................................................5
3.1 Channel Operation Mode....................................................................................................................................5
3.2 DTM Multislot Capability..................................................................................................................................5
3.3 Channel Allocation.............................................................................................................................................7
3.4 Using the Main DCCH to Transmit GPRS Signaling in Dedicated Mode.........................................................9
3.5 DTM Services...................................................................................................................................................10
3.5.1 DTM Establishment.................................................................................................................................11
3.5.2 DTM Release...........................................................................................................................................13
3.5.3 Handover in DTM...................................................................................................................................13
3.5.4 Paging Coordination................................................................................................................................14
3.5.5 Mobility Management.............................................................................................................................14

4 Engineering Guidelines.............................................................................................................16
5 Parameters.....................................................................................................................................18
6 Counters........................................................................................................................................26
7 Glossary.........................................................................................................................................34
8 Reference Documents.................................................................................................................35

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GSM BSS
DTM Feature Parameter Description 1 Introduction

1 Introduction

1.1 Scope
This document describes the definition of dual transfer mode (DTM), channel operation modes,
and DTM multislot capability. It also describes the signaling and service bearers in different
modes. Based on the evolution of the DTM technology, this document details the channel
allocation corresponding to different DTM multislot classes.

The feature involved is GBFD-114151 DTM.

1.2 Intended Audience

This document is intended for:

l Personnel who need to understand the DTM feature

l Personnel who work with Huawei GSM products

1.3 Change History

The change history provides information on the changes in different document versions.

There are two types of changes, which are defined as follows:

l Feature change
Feature change refers to a change in the DTM feature of a specific product version.
l Editorial change
Editorial change refers to a change in wording or the addition of information that was not
described in the earlier version.

Document Issues
The document issues are as follows:

l 02 (2012-08-30)

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DTM Feature Parameter Description 1 Introduction

l 01 (2012-04-28)
l Draft A (2012-02-15)

02 (2012-08-30)
This is the second release of GBSS 14.0.
Compared with issue 01 (2012-04-28) of GBSS14.0, issue 02 (2012-08-30) of GBSS14.0
incorporates the changes described in the following table.

Change Type Change Description Parameter Change

Feature change Updated CS handover None

constraints in section "3.5.3
Handover in DTM"

Editorial change None None

01 (2012-04-28)
This is the first release of GBSS 14.0.
Compared with issue draft A (2012-02-15) of GBSS14.0, issue 01 (2012-04-28) of GBSS14.0
incorporates the changes described in the following table.

Change Type Change Description Parameter Change

Feature change Modified section "3.5.5 None

Mobility Management"
Added "Impact on KPIs."

Editorial change None None

Draft A (2012-02-15)
This is the draft release of GBSS14.0.
Compared with issue 01 (2011-03-31) of GBSS13.0, Draft A (2012-02-15) of GBSS14.0 has
no change.

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DTM Feature Parameter Description 2 Overview

2 Overview

With the development of networks, the profit growth point of the operators is turning towards
data services. The simultaneous handling of speech service and data service becomes a new
demand. Generally, only the class A MS with complex hardware supports speech service and
data service simultaneously. However, few manufacturers can provide the class A MS due to its
complexity. As defined in 3GPP Technical Specifications, DTM is used to implement simplified
class A operation for an MS, that is, to support simultaneous speech service and data service.
After DTM is enabled, the subscribers can send images or browse web pages during a call.
In a 3G network, the speech and data services are processed in parallel. In this sense, DTM
enables the GSM subscribers to enjoy the services similar to those provided by the 3G network.
In addition, the 2G network can complement the 3G network in terms of coverage. After DTM
is enabled, the following applications can be introduced to create new revenue streams for GSM
operators:
l Videophone
Subscribers can enjoy uninterrupted data services during a speech service through the
Guaranteed Bit Rate (GBR).
l Watching or downloading streaming programs
During web browsing, speech interaction or call answering is possible. The subscribers
may require the CS services while watching streaming programs. When DTM is enabled,
CS services can be performed without interrupting the streaming programs.
l Sending images or video during a call
Based on the multislot capability of the MS in DTM, the network can allocate different PDCHs
on the uplink or downlink to meet different bandwidth requirements. The DTM multislot classes
of an MS are classes 5, 6, 9, 10, 11, 31,33, 36-38, and 41-44. DTM can be further classified into
the following types:
l DTM
An MS supports at least class 5 DTM.
l Class11 DTM
Compared with DTM, class 11 DTM doubles the uplink bandwidth of data services. It is
applicable to the uplink preferred services.
l HMC DTM
Compared with DTM, High Multislot Class (HMC) DTM further improves the uplink and
downlink bandwidth of data services.

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DTM Feature Parameter Description 2 Overview

Due to the coexistence of CS and PS services, the requirements for measurement at the physical
layer (such as the measurement of timing advance and signal quality) are different. Currently,
the CS measurement report is considered.
The BSC indicates whether the network supports DTM in system information type 6 (SI6) and
SI13. The MS indicates whether it supports DTM in the information elements Classmark 3 and
Radio Access Capability.

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DTM Feature Parameter Description 3 Technical Description

3 Technical Description

3.1 Channel Operation Mode

To perform the CS and PS services simultaneously, two channel operation modes are defined
in the protocol: single slot operation and multislot operation.
In DTM single slot operation, the MS is assigned a timeslot for both the CS service and the PS
service. The channel combination TCH/H+PDCH/H is recommended in the 3GPP TS 23.060.
In this channel combination mode, the TCH/H must support AMR speech codec, and the PDCH/
H is exclusively used by an MS on the uplink and downlink. A suitable channel can be provided
more easily in single slot operation than in multislot operation.
In DTM multislot operation, the CS and PS services are transmitted on different timeslots. The
DTM multislot capability of an MS determines the number of PDCHs that can be used by the
MS. The channel combination mode recommended by the 3GPP TS 23.060 is TCH/H+PDCH/
F or TCH/F+PDCH/F. The data of multiple MSs can be multiplexed on the PDCH/F but cannot
be multiplexed on the PDCH/H. For channel allocation in DTM multislot operation, the DTM
multislot capability of an MS must be considered. Generally, the TCH is allocated first, and then
PDCHs adjacent to the TCH are allocated.

3.2 DTM Multislot Capability

The DTM multislot capability is different from the common multislot capability. Different MSs
may support different DTM capabilities and they need to be communicated to the network so
that they can be taken into account for the allocation of radio resources. The DTM multislot
capabilities are independent from the currently defined 3GPP TS 45.002 multislot capabilities.
When EGPRS is supported, DTM multislot capability for EGPRS operation (applicable also to
EGPRS2 operation if supported) is indicated independently from DTM multislot capability for
GPRS operation. According to the 3GPP TS 43.055, the DTM multislot classes are classes 5, 6,
9, 10, 11, 31,33, 36-38, and 41-44, and the classes higher than class 31 are called HMC DTM.
The higher the DTM multislot classes supported by the MSs and network devices, the higher
the uplink and downlink data rates that can be supported. Table 3-1 lists the multislot capabilities
corresponding to DTM multislot classes 31,33.

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DTM Feature Parameter Description 3 Technical Description

Table 3-1 HMC multislot capabilities

HMC DTM Maximum Maximum Maximum
Number of Number of Uplink Number of
Downlink Timeslots Concurrent
Timeslots Uplink and
Downlink
Timeslots

31 5 2 6

33 5 4 6

For an MS of multislot class 33, the extended dynamic allocation (EDA) function must be
enabled if the MS requires more than two PDCHs on the uplink.
NOTE

EDA is based on dynamic allocation on the uplink. It enables more uplink timeslots to be allocated to an
MS, increasing the uplink throughput. After the EDA function is enabled, the network allocates multiple
uplink timeslots to an MS, and the MS listens to all the PDCHs corresponding to the allocated timeslots.
If the MS detects that an uplink state flag (USF) is allocated to itself on an allocated PDCH, the MS can
use the uplink blocks corresponding to this PDCH and other allocated PDCHs with larger timeslot numbers.
After the EDA function is enabled, a maximum of four uplink PDCHs can be allocated to a single MS. For
details about EDA and uplink dynamic allocation, see Extended Dynamic Allocation Mode and Dynamic
Allocation Mode respectively.

To reduce the length of the coding, incremental support is defined in the protocol, that is, an MS
that supports a certain multislot class should support the less restrictive DTM multislot
classes. Figure 3-1 shows the maximum number of timeslots for DTM multislot classes 5, 6, 9,
10, and 11. The blue parts indicate the DTM multislot classes, and the arrow indicates the
compatibility direction. For example, if an MS supports class 11, the MS can support classes
10, 9, 6, and 5.

Figure 3-1 Incremental support of DTM multislot classes

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DTM Feature Parameter Description 3 Technical Description

To provide higher data rates for PS services in DTM, the 3GPP defines the HMC DTM. Figure
3-2 shows the maximum timeslot configuration in HMC DTM. Huawei BSC supports HMC
DTM classes 31,33.

An HMC DTM-capable MS also uses incremental support and supports the DTM multislot
classes. For example, an MS of multislot class 33 supports the channel combination for multislot
classes 31, 11, 9, and 5.

Figure 3-2 Incremental support of HMC DTM

3.3 Channel Allocation

In DTM, an MS can occupy one TCH and one or more PDCHs simultaneously. The allocation
of TCHs and PDCHs should comply with the DTM multislot class defined for the MS.

The BSC can allocate the combination of TCH/F+PDCH/F or TCH/F+PDCH/F to the MS. The
data of multiple MSs can be multiplexed on one PDCH/F. DTM CS services can adopt all the
supported speech coding schemes.

The principles for allocating channels to an MS in DTM are as follows:

l Full-rate or half-rate channels are allocated for CS services.

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l When all the other conditions are met, a TCH adjacent to the PDCH is preferably allocated.
l In DTM, the PDCH/F can be shared with other GRPS MSs.
l The QoS of GPRS/EGPRS services in DTM can be guaranteed.

DTM
When SUPPORTDTM is set to Support, the BSC supports multislot classes 5, 6, 9, and 10.
Multislot classes 6 and 10 are treated exactly as DTM multislot classes 5 and 9 respectively.
Higher multislot classes are treated exactly as DTM multislot class 9. For an MS of DTM
multislot class 5, the BSC allocates a maximum of one PDCH on the uplink or downlink, that
is, TCH + 1 PDCH (uplink) + 1 PDCH (downlink). For an MS of DTM multislot class 9, the
BSC allocates a maximum of two PDCHs on the downlink, that is, TCH + 1 PDCH (uplink) +
2 PDCHs (downlink). Regardless of the multislot capability of an MS, the BSC allocates only
one PDCH on the uplink for the MS. Figure 3-3 shows the channel allocation.

Figure 3-3 Channel allocation in DTM

Class 11 DTM (GBFD-119403 Class11 DTM)

When CLASS11DTM is set to Support, an MS of DTM class 11 supports three types of channel
combination: channel combination of DTM class 5, channel combination of DTM class 9, and
TCH + 1 PDCH (downlink) + 2 PDCHs (uplink). If the EDA function is enabled, the MS also
supports the channel combination of TCH + 1 PDCH (downlink) + 2 PDCHs (uplink). An MS
of DTM class 11 supports uplink preferred services better. Figure 3-4 shows the channel
allocation of DTM class 11.

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DTM Feature Parameter Description 3 Technical Description

Figure 3-4 Channel allocation of DTM class 11

HMC DTM (GBFD-119404 HMC DTM)

The classes higher than class 31 are called HMC DTM. When HMCDTM is set to Support, an
MS in a call can occupy a maximum of three PDCHs on both the uplink and downlink. That is,
the channels allocated to the MS can be TCH + 3 PDCHs (downlink) + 1 PDCH (uplink) or
TCH + 1 PDCH (downlink) + 3 PDCHs (uplink). For an MS of DTM multislot class 33, the
EDA function must be enabled if the MS requires more than three PDCHs on the uplink. Figure
3-5 shows the channel allocation of HMC DTM.

Figure 3-5 Channel allocation of HMC DTM

3.4 Using the Main DCCH to Transmit GPRS Signaling in

Dedicated Mode
When DTM is supported, the MS can send or receive GPRS signaling (such as GMM signaling
generated during cell update or routing area update) in CS dedicated mode. One method to
achieve this is that the MS first enters the DTM to establish the uplink TBF and downlink TBF.
After transmitting the GPRS signaling, the MS leaves the DTM and enters the dedicated mode
again. This method is time consuming and decreases the channel resource usage because PS
resources need to be requested first.

The other method is to use the main DCCH to transmit the GRPS signaling in dedicated mode.
This method can accelerate the GPRS signaling transmission and increase the channel resource
usage. When the MS is in dedicated mode, the GPRS signaling is encapsulated as LLC PDU

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DTM Feature Parameter Description 3 Technical Description

according to the LLC protocols, and then the LLC PDU is sent to the RR protocol entity for
processing. The detailed procedure is as follows:
l In the uplink, the LLC PDU is inserted in a new Layer 3 message. This Layer 3 message
containing the protocol identifier GPRS Transparent Transport Protocol (GTTP) is sent to
the BSC on the main DCCH, with the existing Layer 2 mechanisms. The BSC extracts the
Temporary Logical Link Identity (TLLI) and the LLC PDU, which are then encapsulated
into a BSSGP UL-UNITDATA.
l In the downlink, when receiving a BSSGP PDU, the BSC can identify whether the PDU
contains signaling information. If the length of the LLC PDU meets the requirements and
the BSC has an RR connection to the addressed MS with the International Mobile Station
Identification Code (IMSI), the GPRS signaling is sent on the main DCCH.
See Figure 3-6.

Figure 3-6 Using the main DCCH to transmit GPRS signaling in dedicated mode

The restrictions on using the main DCCH to transmit GPRS signaling in dedicated mode are as
follows:
l The MS must be in dedicated mode rather than in DTM.
l The main DCCH can transmit the GPRS signaling, but not the GPRS data.
l The number of LAPDm frames disassembled from the GPRS signaling message must be
smaller than a certain value specified by the network. The value is determined by the
MAX_LAPDm in SI6. MAX_LAPDm has three bits and its value ranges from 5 to 12. By
default, MAX_LAPDm is 5.

3.5 DTM Services

DTM MS is also called simple class A MS. Compared with the traditional class B MS, the simple
class A MS supports DTM besides the dedicated mode, idle mode, packet idle mode, and packet
transfer mode. The DTM MS can have CS and PS connections simultaneously.
When the enhanced CS establishment and release are not supported, the DTM MS cannot transit
between DTM and packet transfer mode, that is, the DTM MS must release the PS resources at

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DTM Feature Parameter Description 3 Technical Description

CS establishment and release and re-establishes a new TBF. Therefore, the PS services are
interrupted temporarily.
As shown in Figure 3-7, a DTM class A MS can request a PS connection through the signaling
channel established for the CS connection to enter the DTM if the MS is in CS dedicated mode.
If a DTM class A MS is in packet transfer mode, the MS should release the TBF before it enters
the CS dedicated mode. Then, the MS should re-establish a TBF to enter the DTM.

Figure 3-7 Conversion between RR modes of class A MS

3.5.1 DTM Establishment

Uplink PS Establishment in Dedicated Mode
In dedicated mode, if the BSS and MS support DTM, the MS can send the DTM Request message
on the main DCCH to establish the uplink PS connection. If the BSS need not re-allocate CS
resources (the original TCHs can be used to carry speech in DTM), it sends a Packet Assignment
message to allocate PS resources to the MS.

Figure 3-8 Uplink PS establishment in dedicated mode without reallocating CS resources

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DTM Feature Parameter Description 3 Technical Description

If the BSS needs to reallocate the CS resources when allocating PS resources (DTM channel
allocation is not appropriate due to existing channel distribution), the BSS sends a DTM
Assignment Command message on the main DCCH to the MS after reallocating the CS
resources. If the MS successfully establishes the new CS connection, it sends an Assignment
Complete message on the new main DCCH. If the MS fails to establish the new CS connection,
it sends an Assignment Failure message on the old main DCCH.

Figure 3-9 Uplink PS establishment in dedicated mode with CS resources reallocated

Downlink PS Establishment in Dedicated Mode

In dedicated mode, if the MS is in the GMM Ready state, the BSS needs to establish a downlink
TBF after receiving the downlink PDU from the SGSN. If the BSS does not need to reallocate
the CS resources, it sends a Packet Assignment message on the main DCCH to the MS.

If the BSS needs to reallocate the CS resources when allocating PS resources, the BSS sends a
DTM Assignment Command message on the new main DCCH to the MS after reallocating the
CS resources. If the MS successfully establishes the new CS connection, it sends an Assignment
Complete message on the new main DCCH. If the MS fails to establish the new CS connection,
it sends an Assignment Failure message on the old main DCCH. The procedure for re-
establishing the downlink PS connection between network elements is the same as the procedure
for re-establishing the uplink PS connection.

Figure 3-10 Downlink PS establishment in dedicated mode and GMM ready state

If the MS is in dedicated mode and GMM standby state, the BSS sends a Packet Notification
message on the main DCCH to the MS after receiving the packet paging from the SGSN. The
MS sends an LLC frame as a response to the packet paging. The SGSN starts to send the downlink
information after receiving the paging response from the MS.

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DTM Feature Parameter Description 3 Technical Description

Figure 3-11 Downlink PS establishment in dedicated mode and GMM standby state

CS Establishment in Packet Transfer Mode

In packet transfer mode, either the MS or the network may initiate a CS connection establishment.
In both cases, the packet session must be aborted before the establishment of the CS connection
is initiated. The PS connection is then established through the main DCCH of the CS resources.

3.5.2 DTM Release

In DTM, if the CS connection is released, the MS must abandon the PS resources.

In the duration of CS services in DTM, if the last TBF is released for an MS, the MS enters the
dedicated mode.

3.5.3 Handover in DTM

The decision on when to change the serving cell of a DTM MS is made through the CS
measurement report. The handover of the CS call and the cell change for the PS transfer must
be performed at the same time. If the DTM handover is not supported, CS handovers may
interrupt PS services.

In an intra-cell handover, the MS leaves the DTM, enters the dedicated mode on the new CS
resource, and then enter the DTM again. In an inter-cell handover, the MS leaves DTM, enters
the dedicated mode in the new cell, reads the system information messages sent on the SACCH,
and then make a cell or RA update and enter the DTM again in the new cell.

In DTM mode, more restrictions are imposed on CS handovers to retain the continuity of CS
and PS services and to protect CS handovers from interrupting PS services.

When DTMCSHOOPTSW is set to NO(No), only the forced handover, emergency handover,
and fast movement handover are allowed.

When DTMCSHOOPTSW is set to YES(Yes), CS handovers caused by the following reasons

are not allowed:

l Cell load sharing

l Traffic sharing in a concentric cell or enhanced dual-band network
l TCHF-to-TCHH handover due to high cell load, TCHF-to-TCHH handover due to
insufficient Abis links, and TCHH-to-TCHF handover due to low cell load

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l TCHF-to-TCHH, TCHH-to-TCHF, TCH-to-SDCCH, and SDCCH-to-TCH handovers due

to channel dynamic adjustment
l Channel repacking

3.5.4 Paging Coordination

The BSC can control the paging response of an MS through the paging coordination function
rather than through the setting of the NMO parameter. This enables the MS to enter the DTM
to establish CS connection and PS connection simultaneously.

l When an MS is in packet transfer mode, the BSC can send the CS Paging message on the
PACCH even if the NMO parameter is set to Network Operation Mode II or Network
Operation Mode III. Therefore, the MS does not miss any CS Paging message.
l When an MS is in dedicated mode and the system supports DTM, the BSC sends the Packet
Notification message on the main DCCH after receiving the PS Paging message. Therefore,
the MS does not miss any PS Paging message.

3.5.5 Mobility Management

If a DTM-capable MS is in dedicated mode, it can perform cell update, RA update, and location
area (LA) update on the main DCCH to reduce the load of packet resources. If LLC PDUs cannot
be transmitted on the main DCCH, they are transmitted on TBFs.

If a DTM-capable MS is in idle mode and is moving from one LA to another, it can perform the
combined RA and LA update in Network Operation Mode I, or perform the parallel LA and RA
updates in Network Operation Mode II or Network Operation Mode III.

When an RA update is completed before an LA update:

l If DTMUPDATEOPTITYPE is set to RAU ACC Send Delay,the BSC sends an RA

Update Accept message to the MS in downlink packet immediate assignment only after
the SDCCH is released.
l If DTMUPDATEOPTITYPE is set to SDCCH Release Delay, the BSC sends an RA
Update Accept message to the MS on the SDCCH. If the BSC receives a DTM Request
message on the SDCCH, the BSC delays in releasing the SDCCH.
l If DTMUPDATEOPTITYPE is set to No Delay, the BSC releases the SDCCH and delivers
the RA Update Accept message in a timely manner.

Figure 3-12 Mobile management procedure when an RA update is complete before an LA update

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DTM Feature Parameter Description 3 Technical Description

If an LA update is complete before an RA update, the BSC sends an RA Update Accept message
on the downlink TBF to be established in downlink packet immediate assignment because the
SDCCH has been released.

Figure 3-13 Mobile management procedure when an LA update is complete before an RA update

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DTM Feature Parameter Description 4 Engineering Guidelines

4 Engineering Guidelines

Parameter Settings
After a cell is enabled with DTM, it is recommended that the early classmark sending control
(ECSC) be set to Yes.

Function Limitations
Currently, the following functions associated with DTM are not supported:
l Single slot operation mode
l Extended DTM multislot capability
l Enhanced CS establishment and release
l DTM handover
To enable DTM, the following conditions must be met:
l DTM requires the support of the BSC, MS, MSC, and SGSN. In addition, the MSC must
support the COMMON ID message.
l DTM is used in built-in PCU configuration mode rather than in external PCU configuration
mode.
l In an extended cell, DTM is not supported due to the limitation of the MS multislot
capability.
l DTM is not supported in a cell where the queuing function is enabled.
l In DTM, NC2 is not supported because GPRS measurement reports are not reported.

Impact on KPIs
l In DTM, MSs must be allocated consecutive TCHs and PDCHs during channel allocation
for PS services. The counters related to uplink and downlink TBF establishments include
the measurement of DTM services. Therefore, when DTM is enabled, Uplink TBF
Establishment Success Rate and Downlink TBF Establishment Success Rate decrease, and
Uplink TBF Congestion Rate and Downlink TBF Congestion Rate increase. To obtain the
KPIs related to TBF establishments when DTM is not enabled in a cell, subtract the counters
related to uplink and downlink TBF establishments for DTM services from the counters
related to uplink and downlink TBF establishments.
l If an MS in DTM experiences a CS call handover or release, the PS service processed by
the MS is released. The counters related to uplink and downlink TBF call drops include the

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DTM Feature Parameter Description 4 Engineering Guidelines

measurement of DTM services. Therefore, when DTM is enabled, Uplink TBF Drop Rate
and Downlink TBF Drop Rate increase. To obtain the KPIs related to TBF call drops when
DTM is not enabled in a cell, subtract the counters related to uplink and downlink TBF call
drops for DTM services from the counters related to uplink and downlink TBF call drops.

Requirements on the license

l DTM can be enabled only after you apply for a resource item license.

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DTM Feature Parameter Description 5 Parameters

5 Parameters

Table 5-1 Parameter description

Parameter ID NE MML Feature ID Feature Name Description
Command

CLASS11DTM BSC6900 SET GBFD-119403 Class11 DTM Meaning:Wheth

GCELLGPRS er a cell supports
the MS with
class 11 DTM
multi-timeslot
capability. Class
11 supports
either of the
following
maximum
timeslot
configuration:
One CS channel,
one uplink PS
channel, and two
downlink PS
channels; One
CS channel, two
uplink PS
channels, and
one downlink
PS channel.
GUI Value
Range:UNSUP
PORT(Not
Support),
SUPPORT
(Support)
Unit:None
Actual Value
Range:UNSUP

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GSM BSS
DTM Feature Parameter Description 5 Parameters

Parameter ID NE MML Feature ID Feature Name Description

Command

PORT,
SUPPORT
Default
Value:UNSUPP
ORT(Not
Support)

DTMCSHOOP BSC6900 SET GBFD-114151 DTM Meaning:Wheth

TSW OTHSOFTPA er to allow the
RA BSC to initiate
handovers other
than load-based
handovers on
MSs in dual
transfer mode
(DTM). If this
parameter is set
to NO(No), only
emergency
handovers,
forced
handovers and
fast movement
handovers are
allowed for MSs
in DTM mode. If
this parameter is
set to YES(Yes),
handovers
except load-
based handovers
are allowed for
MSs in DTM
mode.
GUI Value
Range:NO(No),
YES(Yes)
Unit:None
Actual Value
Range:NO, YES
Default
Value:NO(No)

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GSM BSS
DTM Feature Parameter Description 5 Parameters

Parameter ID NE MML Feature ID Feature Name Description

Command

DTMUPDATE BSC6900 SET GBFD-114151 DTM Meaning:Proces

OPTITYPE OTHSOFTPA sing mode for
RA the BSC6900
when receiving
the RAU Accept
message during
DTM combined
update
procedure. If
this parameter is
set to
RAU_ACC_SE
ND_DELAY,
the BSC6900
sends the
Routing Area
Updating
Accept message
to an MS only
after an SDCCH
is released. If
this parameter is
set to
SDCCH_REL_
DELAY, the
BSC6900 sends
the Routing
Area Updating
Accept message
to the MS by
sending the
downlink GPRS
Information
message. If the
DTM Request
message is
received on an
SDCCH, the
BSC6900 delays
releasing the
SDCCH. If this
parameter is set
to NO_DELAY,
the BSC6900
does not take
any delay
measures.
GUI Value
Range:RAU_A

Issue 02 (2012-08-30) Huawei Proprietary and Confidential 20

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GSM BSS
DTM Feature Parameter Description 5 Parameters

Parameter ID NE MML Feature ID Feature Name Description

Command

CC_SEND_DE
LAY(RAU
ACC Send
Delay),
SDCCH_REL_
DELAY
(SDCCH
Release Delay),
NO_DELAY
(No Delay)
Unit:None
Actual Value
Range:RAU_A
CC_SEND_DE
LAY,
SDCCH_REL_
DELAY,
NO_DELAY
Default
Value:RAU_A
CC_SEND_DE
LAY(RAU
ACC Send
Delay)

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GSM BSS
DTM Feature Parameter Description 5 Parameters

Parameter ID NE MML Feature ID Feature Name Description

Command

ECSC BSC6900 SET GBFD-111101 System Meaning:The

GCELLCCBA GBFD-114302 Information early classmark
SIC Sending sending control
GSM/TD- (ECSC)
SCDMA parameter
Interoperability specifies
whether the MSs
in a cell use early
classmark
sending. After a
successful
immediate
assignment, the
MS sends
additional
classmark
information to
the network as
early as
possible. The
additional
classmark
information
mainly contains
the CM3
(classmark 3)
information.
The CM3
(classmark 3)
information
contains the
frequency band
support
capability of the
MS (used for the
future channel
assignment),
power
information
about each
frequency band
supported by the
MS (used for the
handover
between
different
frequency
bands), and
encryption

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GSM BSS
DTM Feature Parameter Description 5 Parameters

Parameter ID NE MML Feature ID Feature Name Description

Command

capability of the
MS.
GUI Value
Range:NO(No),
YES(Yes)
Unit:None
Actual Value
Range:NO, YES
Default
Value:YES
(Yes)

HMCDTM BSC6900 SET GBFD-119404 HMC DTM Meaning:Wheth

GCELLGPRS er the cell
supports the MS
with the DTM
multi-timeslot
capability.
GUI Value
Range:UNSUP
PORT(Not
Support),
SUPPORT
(Support)
Unit:None
Actual Value
Range:UNSUP
PORT,
SUPPORT
Default
Value:UNSUPP
ORT(Not
Support)

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GSM BSS
DTM Feature Parameter Description 5 Parameters

Parameter ID NE MML Feature ID Feature Name Description

Command

NMO BSC6900 SET GBFD-119108 Network Meaning:This

GCELLPSBAS GBFD-114151 Operation Mode parameter is
E Support related to the
DTM paging channel
of the system.
There are three
network
operation
modes: network
operation mode
I, network
operation mode
II, and network
operation mode
III. Network
operation mode
I is used when
the system is
configured with
the Gs interface.
Network
operation mode
II is used when
the system is not
configured with
the Gs interface
and the PCCCH
is not
configured.
Network
operation mode
III is used when
the system is not
configured with
the Gs interface
and the PCCCH
is configured.
GUI Value
Range:NMOI
(Network
Operation Mode
I), NMOII
(Network
Operation Mode
II), NMOIII
(Network
Operation Mode
III)
Unit:None

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GSM BSS
DTM Feature Parameter Description 5 Parameters

Parameter ID NE MML Feature ID Feature Name Description

Command

Actual Value
Range:NMOI,
NMOII,
NMOIII
Default
Value:NMOII
(Network
Operation Mode
II)

SUPPORTDT BSC6900 SET GBFD-114151 DTM Meaning:Wheth

M GCELLGPRS er to support
dual transfer
mode (DTM).
The DTM
enables an MS to
process CS and
PS services
simultaneously.
GUI Value
Range:UNSUP
PORT(Not
Support),
SUPPORT
(Support)
Unit:None
Actual Value
Range:UNSUP
PORT,
SUPPORT
Default
Value:UNSUPP
ORT(Not
Support)

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GSM BSS
DTM Feature Parameter Description 6 Counters

6 Counters

Table 6-1 Counter description

Counter ID Counter Name Counter Feature ID Feature Name
Description

1278474452 CELL.DTM.CHAN R3100:DTM GBFD-114151 DTM

.ALLOC.REQ.TIM Channel
ES Assignments Times

1278474453 CELL.DTM.CHAN R3141A:DTM GBFD-114151 DTM

.ALLOC.SUCC.TI Channel
MES.TCHF Assignments
Successful Times
(TCHF)

1278474454 CELL.DTM.CHAN R3142A:DTM GBFD-114151 DTM

.ALLOC.SUCC.TI Channel
MES.TCHH Assignments
Successful Times
(TCHH)

1279171423 DCCH.PACKET.N A9607:Number of GBFD-114151 DTM

OTIFICATION.PA Packet Notification
GING.MSG Sent on DCCH

1279173455 UP.GPRS.TBF.AB A9039:Number of GBFD-114151 DTM

NORM.REL.CS.H Abnormal Uplink
O GPRS TBF Releases
due to CS Handover

1279174453 DOWN.GPRS.TBF A9137:Number of GBFD-114151 DTM

.ABNORM.REL.C Abnormal downlink
S.HO GPRS TBF Releases
due to CS Handover

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GSM BSS
DTM Feature Parameter Description 6 Counters

Counter ID Counter Name Counter Feature ID Feature Name

Description

1279175453 UP.EGPRS.TBF.A A9237:Number of GBFD-114151 DTM

BNORM.REL.CS. Abnormal Uplink
HO EGPRS TBF
Releases due to CS
Handover

1279176451 DOWN.EGPRS.TB A9335:Number of GBFD-114151 DTM

F.ABNORM.REL. Abnormal downlink
CS.HO EGPRS TBF
Releases due to CS
Handover

1279183473 UPLINK.GPRS.IN L9457:Number of GBFD-114151 DTM

FO Received Uplink
GPRS Information
Messages

1279183474 UPLINK.GPRS.IN L9458:Total Bytes GBFD-114151 DTM

FO.TOTAL.BYTE of Received Uplink
GPRS Information
Messages

1279184477 DOWNLINK.GPR L9561:Number of GBFD-114151 DTM

S.INFO Sent Downlink
GPRS Information
Messages

1279184478 DOWNLINK.GPR L9562:Total Bytes GBFD-114151 DTM

S.INFO.TOTAL.B of Sent Downlink
YTE GPRS Information
Messages

1279187424 SINGLE.SLOT.DT A9708:Processing GBFD-114151 DTM

M Times of PS
Services by MSs
Supporting Single
Slot DTM

1279187425 DTM.GPRS.MULT A9709:Processing GBFD-114151 DTM

ISLOT.CLASS5 Times of PS
Services by MSs
Supporting
Multislot Class 5 in
DTM GPRS

1279187426 DTM.GPRS.MULT A9710:Processing GBFD-114151 DTM

ISLOT.CLASS6 Times of PS
Services by MSs
Supporting
Multislot Class 6 in
DTM GPRS

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GSM BSS
DTM Feature Parameter Description 6 Counters

Counter ID Counter Name Counter Feature ID Feature Name

Description

1279187427 DTM.GPRS.MULT A9711:Processing GBFD-114151 DTM

ISLOT.CLASS9 Times of PS
Services by MSs
Supporting
Multislot Class 9 in
DTM GPRS

1279187428 DTM.GPRS.MULT A9712:Processing GBFD-114151 DTM

ISLOT.CLASS10 Times of PS
Services by MSs
Supporting
Multislot Class 10 in
DTM GPRS

1279187429 DTM.GPRS.MULT A9713:Processing GBFD-119403 Class11 DTM

ISLOT.CLASS11 Times of PS
Services by MSs
Supporting
Multislot Class 11 in
DTM GPRS

1279187430 DTM.EGPRS.MUL A9714:Processing GBFD-114151 DTM

TISLOT.CLASS5 Times of PS
Services by MSs
Supporting
Multislot Class 5 in
DTM EGPRS

1279187431 DTM.EGPRS.MUL A9715:Processing GBFD-114151 DTM

TISLOT.CLASS6 Times of PS
Services by MSs
Supporting
Multislot Class 6 in
DTM EGPRS

1279187432 DTM.EGPRS.MUL A9716:Processing GBFD-114151 DTM

TISLOT.CLASS9 Times of PS
Services by MSs
Supporting
Multislot Class 9 in
DTM EGPRS

1279187433 DTM.EGPRS.MUL A9717:Processing GBFD-114151 DTM

TISLOT.CLASS10 Times of PS
Services by MSs
Supporting
Multislot Class 10 in
DTM EGPRS

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GSM BSS
DTM Feature Parameter Description 6 Counters

Counter ID Counter Name Counter Feature ID Feature Name

Description

1279187434 DTM.EGPRS.MUL A9718:Processing GBFD-119403 Class11 DTM

TISLOT.CLASS11 Times of PS
Services by MSs
Supporting
Multislot Class 11 in
DTM EGPRS

1279187437 DTM.GPRS.HIGH. A9721:Processing GBFD-119404 HMC DTM

MULTISLOT.CLA Times of PS
SS31.36 Services by MSs
Supporting
Multislot Class 31 or
36 in DTM GPRS

1279187438 DTM.GPRS.HIGH. A9722:Processing GBFD-119404 HMC DTM

MULTISLOT.CLA Times of PS
SS32.37 Services by MSs
Supporting
Multislot Class 32 or
37 in DTM GPRS

1279187439 DTM.GPRS.HIGH. A9723:Processing GBFD-119404 HMC DTM

MULTISLOT.CLA Times of PS
SS33.38 Services by MSs
Supporting
Multislot Class 33 or
38 in DTM GPRS

1279187440 DTM.GPRS.HIGH. A9724:Processing GBFD-119404 HMC DTM

MULTISLOT.CLA Times of PS
SS41 Services by MSs
Supporting
Multislot Class 41 in
DTM GPRS

1279187441 DTM.GPRS.HIGH. A9725:Processing GBFD-119404 HMC DTM

MULTISLOT.CLA Times of PS
SS42 Services by MSs
Supporting
Multislot Class 42 in
DTM GPRS

1279187442 DTM.GPRS.HIGH. A9726:Processing GBFD-119404 HMC DTM

MULTISLOT.CLA Times of PS
SS43 Services by MSs
Supporting
Multislot Class 43 in
DTM GPRS

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GSM BSS
DTM Feature Parameter Description 6 Counters

Counter ID Counter Name Counter Feature ID Feature Name

Description

1279187443 DTM.GPRS.HIGH. A9727:Processing GBFD-119404 HMC DTM

MULTISLOT.CLA Times of PS
SS44 Services by MSs
Supporting
Multislot Class 44 in
DTM GPRS

1279187444 DTM.EGPRS.HIG A9728:Processing GBFD-119404 HMC DTM

H.MULTISLOT.C Times of PS
LASS31.36 Services by MSs
Supporting
Multislot Class 31 or
36 in DTM EGPRS

1279187445 DTM.EGPRS.HIG A9729:Processing GBFD-119404 HMC DTM

H.MULTISLOT.C Times of PS
LASS32.37 Services by MSs
Supporting
Multislot Class 32 or
37 in DTM EGPRS

1279187446 DTM.EGPRS.HIG A9730:Processing GBFD-119404 HMC DTM

H.MULTISLOT.C Times of PS
LASS33.38 Services by MSs
Supporting
Multislot Class 33 or
38 in DTM EGPRS

1279187447 DTM.EGPRS.HIG A9731:Processing GBFD-119404 HMC DTM

H.MULTISLOT.C Times of PS
LASS41 Services by MSs
Supporting
Multislot Class 41 in
DTM EGPRS

1279187448 DTM.EGPRS.HIG A9732:Processing GBFD-119404 HMC DTM

H.MULTISLOT.C Times of PS
LASS42 Services by MSs
Supporting
Multislot Class 42 in
DTM EGPRS

1279187449 DTM.EGPRS.HIG A9733:Processing GBFD-119404 HMC DTM

H.MULTISLOT.C Times of PS
LASS43 Services by MSs
Supporting
Multislot Class 43 in
DTM EGPRS

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GSM BSS
DTM Feature Parameter Description 6 Counters

Counter ID Counter Name Counter Feature ID Feature Name

Description

1279187450 DTM.EGPRS.HIG A9734:Processing GBFD-119404 HMC DTM

H.MULTISLOT.C Times of PS
LASS44 Services by MSs
Supporting
Multislot Class 44 in
DTM EGPRS

1279189417 DTM.DCCH.UPLI A9801:Number of GBFD-114151 DTM

NK.DTM.REQUES DTM Request
T Received on DCCH

1279189418 DTM.DCCH.UPLI A9802:Number of GBFD-114151 DTM

NK.DTM.ASS Uplink DTM
Assignments Sent
on DCCH

1279189419 DTM.SUCC.DCCH A9803:Number of GBFD-114151 DTM

.UPLINK.DTM.AS Successful Uplink
S DTM Assignments
Received on DCCH

1279189420 DTM.FAIL.DCCH. A9804:Number of GBFD-114151 DTM

UPLINK.DTM.AS Failed Uplink DTM
S Assignments
Received on DCCH

1279189421 DTM.DCCH.UPLI A9805:Number of GBFD-114151 DTM

NK.PACKET.ASS Packet Uplink
Assignments Sent
on DCCH

1279189422 DTM.SUCC.DCCH A9806:Number of GBFD-114151 DTM

.UPLINK.PACKET Successful Packet
.ASS Uplink Assignments
Sent on DCCH

1279189423 DTM.DCCH.UPLI A9807:Number of GBFD-114151 DTM

NK.DTM.REJ Uplink DTM
Rejects Sent on
DCCH

1279189424 DTM.DCCH.DOW A9808:Number of GBFD-114151 DTM

NLINK.DTM.ASS Downlink DTM
Assignments Sent
on DCCH

1279189425 DTM.SUCC.DCCH A9809:Number of GBFD-114151 DTM

.DOWNLINK.DT Successful
M.ASS Downlink DTM
Assignments
Received on DCCH

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GSM BSS
DTM Feature Parameter Description 6 Counters

Counter ID Counter Name Counter Feature ID Feature Name

Description

1279189426 DTM.FAIL.DCCH. A9810:Number of GBFD-114151 DTM

DOWNLINK.DTM Failed Downlink
.ASS DTM Assignments
Received on DCCH

1279189427 DTM.DCCH.DOW A9811:Number of GBFD-114151 DTM

NLINK.PACKET. Packet Downlink
ASS Assignments Sent
on DCCH

1279189428 DTM.SUCC.DCCH A9812:Number of GBFD-114151 DTM

.DOWNLINK.PAC Successful Packet
KET.ASS Downlink
Assignments Sent
on DCCH

1282433000 DTM.UP.TBF.EST A9813:Number of GBFD-114151 DTM

B.ATMP Uplink DTM TBF
Establishment
Attempts

1282433001 DTM.UP.TBF.EST A9814:Number of GBFD-114151 DTM

B.SUCC Successful Uplink
DTM TBF
Establishments

1282433002 DTM.UP.TBF.EST A9815:Number of GBFD-114151 DTM

B.FAIL.NO.CHAN Failed Uplink DTM
.RES TBF Establishments
Due to No Channel

1282433003 DTM.DOWN.TBF. A9816:Number of GBFD-114151 DTM

ESTB.ATMP Downlink DTM
TBF Establishment
Attempts

1282433004 DTM.DOWN.TBF. A9817:Number of GBFD-114151 DTM

ESTB.SUCC Successful
Downlink DTM
TBF Establishments

1282433005 DTM.DOWN.TBF. A9818:Number of GBFD-114151 DTM

ESTB.FAIL.NO.C Failed Downlink
HAN.RES DTM TBF
Establishments Due
to No Channel

1282433006 DTM.UP.TBF.AB A9819:Number of GBFD-114151 DTM

NORM.REL.N3101 Uplink DTM TBF
.OVERFLOW Abnormal Releases
Due to N3101
Overflow

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GSM BSS
DTM Feature Parameter Description 6 Counters

Counter ID Counter Name Counter Feature ID Feature Name

Description

1282433007 DTM.UP.TBF.AB A981A:Number of GBFD-114151 DTM

NORM.REL.N3103 Uplink DTM TBF
.OVERFLOW Abnormal Releases
Due to N3103
Overflow

1282433008 DTM.DOWN.TBF. A981B:Number of GBFD-114151 DTM

ABNORM.REL.N3 Downlink DTM
105.OVERFLOW TBF Abnormal
Releases Due to
N3105 Overflow

1282433009 DTM.DOWN.TBF. A981C:Number of GBFD-114151 DTM

TRANS.INTERRU Downlink DTM
PT.TIMES Intermit Transfers

1282433010 DTM.UP.TBF.AB A981D:Number of GBFD-114151 DTM

NORM.REL.CS.H Abnormal Uplink
ANGUP.AND.HO DTM TBF Releases
Due to CS Hangup
or Handover

1282433011 DTM.DOWN.TBF. A981E:Number of GBFD-114151 DTM

ABNORM.REL.CS Abnormal
.HANGUP.AND.H Downlink DTM
O TBF Releases Due
to CS Hangup or
Handover

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GSM BSS
DTM Feature Parameter Description 7 Glossary

7 Glossary

For the acronyms, abbreviations, terms, and definitions, see the Glossary.

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GSM BSS
DTM Feature Parameter Description 8 Reference Documents

8 Reference Documents

1. 3GPP TS 43.055 Dual Transfer Mode (DTM); Stage 2

2. 3GPP TS 44.018 Mobile radio interface layer 3 specification; Radio Resource Control
(RRC) protocol
3. 3GPP TS 44.060 General Packet Radio Service (GPRS); Mobile Station (MS) - Base
Station System (BSS) interface; Radio Link Control / Medium Access Control (RLC/MAC)
protocol
4. 3GPP TS 45.002 Multiplexing and multiple access on the radio path
5. 3GPP TS 24.008 Mobile radio interface Layer 3 specification; Core network protocols;
Stage 3
6. 3GPP TS 24.007 Mobile radio interface signaling layer 3; General Aspects
7. BSC6900 Feature List
8. BSC6900 Optional Feature Description
9. BSC6900 GSM Parameter Reference
10. BSC6900 GSM MML Command Reference
11. BSC6900 Performance Counter Reference
12. BSC6900 Hardware Description

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