Fast dormancy

Fast Dormancy
RAN13.0
Feature Parameter Description
Issue 02
Date 2011-10-30
HUAWEI TECHNOLOGIES CO., LTD.

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WCDMA RAN
Fast Dormancy Contents
Issue 02 (2011-10-30) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
i
Contents
1 Introduction................................................................................................................................1-1
1.1 Scope ............................................................................................................................................ 1-1
1.2 Intended Audience ........................................................................................................................ 1-1
1.3 Change History.............................................................................................................................. 1-1
2 Overview .....................................................................................................................................2-1
3 Fast Dormancy ..........................................................................................................................3-1
4 Enhanced Fast Dormancy ......................................................................................................4-1
4.1 Overview ....................................................................................................................................... 4-1
4.2 Identifying Fast Dormancy UEs..................................................................................................... 4-2
4.3 State Transitions for Fast Dormancy UEs ..................................................................................... 4-3
5 Parameters .................................................................................................................................5-1
6 Counters......................................................................................................................................6-1
7 Glossary ......................................................................................................................................7-1
8 Reference Documents .............................................................................................................8-1

WCDMA RAN
Fast Dormancy 1 Introduction
1-1
1 Introduction
1.1 Scope
This document describes the fast dormancy feature, WRFD-020500 Enhanced Fast Dormancy.
1.2 Intended Audience
This document is intended for:
 Personnel who need to understand fast dormancy.
 Personnel who work with Huawei products
1.3 Change History
This section provides information on the changes in different document versions.
There are two types of changes, which are defined as follows:
 Feature change: refers to the change in the fast dormancy feature of a specific product version.
 Editorial change: refers to the change in wording or the addition of the information that was not
described in the earlier version.
Document Issues
The document issues are as follows:
 02 (2011-10-30)
 01 (2011-04-30)
 Draft B (2011-03-30)
 Draft A (2010-12-30)
02 (2011-10-30)
This is the document for the second commercial release of RAN13.0.
Compared with issue 01 (2011-04-30) of RAN13.0, the description about standard fast dormancy is
added.
01 (2011-04-30)
This is the document for the first commercial release of RAN13.0.
Compared with issue Draft B (2011-03-30) of RAN13.0, this issue has no change.
Draft B (2011-03-30)
This is the second draft of the document for RAN13.0.
Compared with Draft A (2010-12-30) of RAN13.0, this issue optimizes the description.
Draft A (2010-12-30)
This is the first draft of the document for RAN13.0.
Compared with issue 01 (2010-03-30) of RAN12.0, this issue optimizes the description.

WCDMA RAN
Fast Dormancy 2 Overview
2-1
2 Overview
When fast dormancy, enhanced fast dormancy, or standard fast dormancy is applied, the UE can request
the RNC to release the PS signaling connection if no more PS data is being transmitted. Upon receiving
such a request, the RNC can either release the signaling connection and put the UE into idle mode, or
maintain the signaling connection and put the UE through Cell_FACH to CELL/URA_PCH state to
reduce battery consumption.
The descriptions about fast dormancy, enhanced fast dormancy, and standard fast dormancy are as
follows:
 With fast dormancy, after receiving a Signaling Connection Release Indication (SCRI) message from a
UE, the RNC releases the UE RRC connection regardless of whether the message contains the cause
value "UE Requested PS Data session end."
 With enhanced fast dormancy, UEs send SCRI messages that do not contain the cause value "UE
Requested PS Data session end" to the RNC. After receiving such an SCRI message, the RNC moves
the UE through Cell_FACH to CELL/URA_PCH state.
 Standard fast dormancy is applicable to fast dormancy UEs that comply with 3GPP Release 8 (R8 for
short). With standard fast dormancy, UEs send SCRI messages that contain the cause value "UE
Requested PS Data session end" to the RNC. After receiving such an SCRI message, the RNC moves
the UE through Cell_FACH to CELL/URA_PCH state. Standard fast dormancy is valid only when the
RNC has enabled the timer T323 in system information block type 1 (SIB1).

WCDMA RAN
Fast Dormancy 3 Fast Dormancy
3-1
3 Fast Dormancy
UEs complying with 3GPP Release 8 support the fast dormancy function, as defined in 3GPP TS 25.331
CR3483. When a UE processing only PS services finishes PS data transmission, it sends the RNC an
SCRI message that may contain the cause value "UE Requested PS Data session end." Upon receiving
the message, the RNC releases the UE’s RRC connection and enables the UE to quickly enter
power-saving mode.
The following figure shows the procedure of fast dormancy.
Figure 3-1 Fast dormancy
The RNC sends the timer T323 in SIB1 or UTRAN Mobility Information to the UE to control fast
dormancy.
 If the value of T323 is INVALID, the timer is not sent to the UE. Accordingly, the UE does not send the
SCRI message containing the cause value "UE Requested PS Data session end."
 If the value of T323 is 0, the UE can recognize the timer. In such a case, when to send the SCRI
messages is determined by the UE behavior.
 If the value of T323 is a value other than 0, the UE sends the release request and initiates timer T323.
The UE sends the release request again after T323 expires.
 If the UE cannot recognize the timer T323, when to send the SCRI messages is not determined by the
timer. The SCRI messages will not contain the cause value "UE Requested PS Data session end."

WCDMA RAN
Fast Dormancy 4 Enhanced Fast Dormancy
4-1
4 Enhanced Fast Dormancy
4.1 Overview
As the number of intelligent UEs in mobile networks continues increasing, these networks face signaling
storms produced by these UEs. With many customers all over the world, Huawei has a wealth of
experience in network optimization. Huawei can provide a comprehensive end-to-end solution based on
network characteristics to respond to network challenges. Enhanced fast dormancy is one component of
the solution. This feature alone is not enough to eliminate the signaling storms caused by intelligent UEs.
However, applied effectively with professional services, enhanced fast dormancy can be used to
optimize the quality of service for the entire network.
Consult Huawei engineers about the comprehensive solution to obtain professional technical support. Huawei engineers
will recommend the appropriate parameter settings for this feature based on the network conditions. Do not configure the
parameters related to this feature without Huawei professional technical support. Inappropriate parameter settings may
lead to network failures.
Enhanced fast dormancy is applicable to networks serving a large number of intelligent UEs already
supporting fast dormancy. Enhanced fast dormancy can reduce the signaling processing efforts of the
RNC and prevent the signaling processing unit in the RNC from overflowing.
To save power, when there is no PS data to transmit, an intelligent UE sends the RNC an SCRI message
to request the RRC connection release or to indicate to the UTRAN that one of its signaling connections
has been released. In addition, the UE periodically sends heartbeat messages to the core network, for
example, to check for new mail on the mail server.
If fast dormancy (rather than enhanced fast dormancy) is applied, the RNC releases the RRC connection
as indicated in the 3GPP specifications. In such a case, the heartbeat messages lead to the procedures
for RRC connection setups, authentication, encryption, and RAB setups. This greatly increases the
signaling processing workload of the RNC and may cause the signaling processing unit in the RNC to
overflow.
Enhanced fast dormancy and standard fast dormancy are introduced to address this problem. With the
application of enhanced fast dormancy or standard fast dormancy, the RNC changes the UE state
through Cell_FACH to CELL/URA_PCH instead of idle mode upon receiving an SCRI message from the
UE. In such a case, when the UE periodically sends heartbeat messages, the signaling procedure
between the UE and RNC is simplified because the RRC connection is maintained. As the number of
signaling exchange messages decreases, significant CPU resources can be saved for the RNC, and the
UE consumes as little battery power as a UE in idle mode.
The following figure shows the difference between fast dormancy, enhanced fast dormancy, and
standard fast dormancy.

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4-2
Figure 4-1 Difference between fast dormancy, enhanced fast dormancy, and standard fast dormancy
4.2 Identifying Fast Dormancy UEs
Two types of fast dormancy mechanisms are implemented in UEs. UEs that support fast dormancy are
referred to as fast dormancy UEs in this document.
 Standard fast dormancy (R8 fast dormancy): This mechanism is standardized by 3GPP Release 8. As
specified, the UE sends an SCRI message to the network with the cause value "Signaling Connection
Release Indication Cause" set to "UE Requested PS Data session end."
The RNC can identify this type of UE by the SCRI message with the cause value "UE Requested PS
Data session end."
 Pre-R8 fast dormancy: This mechanism, which is not standardized, is used for the early proprietary
implementations of fast dormancy prior to Release 8.
The RNC can identify this type of UE by its IMEI and its release version.
Upon receiving a Security Mode Command Complete message from the UE, the RNC identifies
enhanced fast dormancy UEs as follows:
 If the FD_TAC_MATCH_SWITCH of the parameter PROCESSSWITCH is turned on, the following
UEs are identified as fast dormancy UEs:
− UE (Pre-R8 fast dormancy) that complies with 3GPP Release 5 or later releases and whose IMEI is
on the white list. The IMEI range for the white list is specified by the binary group (TAC,
FastDormancy = ON) in the RNC MML command ADD UIMEITAC. If the FastDormancy switch is
on, the RNC considers the UEs specified by the IMEI (TAC) capable of enhanced fast dormancy.
− UE (R8 fast dormancy) from which the SCRI message whose cause value is "UE Requested PS
Data session end" is sent.
 If the FD_TAC_MATCH_SWITCH of the parameter PROCESSSWITCH is turned off, the following
UEs are identified as fast dormancy UEs.
− UEs complying with 3GPP Release 5 or later releases, excluding those on the black list. The IMEI
range for the black list is specified by the binary group (TAC, FastDormancy = OFF) in the RNC
MML command ADD UIMEITAC. If the FastDormancy switch is OFF, the RNC considers the UEs
specified by the IMEI (TAC) incapable of enhanced fast dormancy.

WCDMA RAN
4-3
The RNC can obtain the IMEI of the UE from the UE's response to the "IDENTITY REQUEST" message.
The IMEI range is specified by the parameter TAC in the RNC MML command ADD UIMEITAC.
The IMEI (consisting of 14 decimal digits and one check digit) contains the origin, model, and serial
number of the UE. The structure of the IMEI is specified in 3GPP TS 23.003.
TAC (8bit) SNR (6bit) Spare (1bit)
 The Type Allocation Code (TAC) indicates a particular type of device that has been approved by a
national GSM/WCDMA approval body.
 SNR is the serial number identifying the UE.
The RNC can determine whether a UE supports fast dormancy by the manufacturer and model
information contained in the TAC.
After the RNC receives a Security Mode Command Complete message from the UE, the RNC identifies
standard fast dormancy UEs as follows:
 The RNC has enabled the timer T323 in SIB1.
 The RNC has received an SCRI with the cause value "UE Requested PS Data session end."
4.3 State Transitions for Fast Dormancy UEs
If enhanced fast dormancy is disabled, the UE’s RRC connection is released after the RNC receives an
SCRI message. The enhanced fast dormancy switches are specified by the RNC-level subparameter
FAST_DORMANCY_SWITCH of the parameter PROCESSSWITCH and cell-level subparameter
FAST_DORMANCY_ADCTRL of the parameter NBMCacAlgoSwitch.
If enhanced fast dormancy is enabled, then
 If the UE is identified as R8 UE (the UE can report the SCRI with R8 extensional cause of “data
session end”),
− If the RNC received the SCRI with the cause of “data session end”, the RNC transfers the UE to
CELL_FACH or CELL_PCH.
 If the UE in not R8 UE and the UE is identified as fast dormancy UE,
− If the switch RsvdBit1_BIT12 in SET URRINNERTIMER is set to 1, the RNC release the UE after
receiving the SCRI.
− If the switch RsvdBit1_BIT12 in SET URRINNERTIMER is set to 0, the RNC transfer the UE to
CELL_FACH or CELL_PCH after receiving the SCRI.
Note
The MML command SET URRINNERTIMER and the parameter RsvdBit1_BIT12 are the inner command and the inner
parameter, respectively. The parameter RsvdBit1_BIT12 is set to 0 in default, if you want to change the default value,
please contact Huawei engineers.
− If the inactive timer for enhanced fast dormancy times out, the RNC transfers the UE to CELL_FACH
or CELL_PCH.
The following figure shows the state transitions for a fast dormancy UE.

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4-4
Figure 4-2 State transitions for a fast dormancy UE
Table 4-1 State transitions for a fast Dormancy UE
Type Description

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4-5
D2P
D2F
F2P
D2P indicates a transition from CELL_DCH to CELL_PCH. Similarly, F2P is from CELL_FACH to
CELL_PCH, and D2F is from CELL_DCH to CELL_FACH.
The RNC starts the PS inactivity timer for fast dormancy after the fast dormancy UE changes
state.
 PsInactTmrForFstDrmDch specifies the PS inactivity timer for CELL_DCH.
 PsInactTmrForFstDrmFach specifies the PS inactivity timer for CELL_FACH.
 PsInactTmrForPreFstDrm specifies the PS inactivity timer for CELL_PCH.
If the UE is a fast dormancy UE and is not processing CS services, when the PS inactivity timer for
fast dormancy expires or the RNC receives the SCRI message or 4B event from the UE, the UE
changes states as follows:
 If the UE is in the CELL_DCH state,
− If the switch RSVDBIT1_BIT29 of RsvdPara1 in the SET URRCTRLSWITCH command is
turned off, then the RNC will trigger the D2F state transition, where the UE transitions from
CELL_DCH to CELL_FACH.
− If the switch RSVDBIT1_BIT29 of RsvdPara1 in the SET URRCTRLSWITCH command is
turned on, then the RNC will trigger the D2P state transition, where the UE transitions from
CELL_DCH to CELL_PCH.
The state transition from CELL_DCH to CELL_FACH and the state transition from CELL_FACH to CELL_PCH
are recommended, and the reasons are as follows:
 During IOT test, some terminal issues happen. Some terminals sometime are failed to establish services after
transition from CELL_DCH to CELL_PCH/URA_PCH directly. It will cause very bad impact on end user’s
experience.
 Compare with state transition from CELL_DCH to CELL_PCH/URA_PCH via CELL_FACH, the state
transition from CELL_DCH to CELL_PCH/URA_PCH directly won’t improve the performance of network and
the experience of users.
 Some terminals send CELL UPDATE message to transfter data immediately after state transition from
CELL_DCH to CELL_PCH/URA_PCH, which will increase the signaling messages leading to heavy load in
Uu interface.
 If the UE is in the CELL_FACH state,
− The RNC will trigger F2P state transition, where the UE transitions from CELL_FACH to
CELL_PCH.
D2I D2I indicates a transition from CELL_DCH to IDLE.
When the FACH is congested, D2F will not be triggered for inactive CELL_DCH users. Instead,
the RNC triggers a D2I transition in order to release the UE connection.
The default D2I function switch is turned off by default. Run the following command to switch it on:
SET UCORRMALGOSWITCH: ReservedSwitch0=RESERVED_SWITCH_0_BIT16-1;
P2I P2I indicates a transition from CELL_PCH to IDLE.
If the UE is in the CELL_PCH state, when the PS inactivity timer for fast dormancy (specified by
PsInactTmrForPreFstDrm) expires, the RNC releases the RRC connection and then the UE
enters idle mode.

WCDMA RAN
4-6
P2D P2D indicates a transition from CELL_PCH to CELL_DCH.
 If the switch RSVDBIT1_BIT20 of RsvdPara1 in the SET URRCTRLSWITCH command is
turned on:
When the UE tries to originate or terminate a CS service and the FACH is congested, the RNC
instructs the UE to perform P2D state transition instead of P2F and then F2D.
SET URRCTRLSWITCH: RsvdPara1=RSVDBIT1_BIT20-0;
Note: For the RSVDBIT1_BIT20 switch, 0 indicates on and 1 indicates off.
 If the switch FD_P2D_SWITCH of PROCESSSWITCH in the ADD UIMEITAC command is
turned on:
If the TAC of the UE is the same as that configured on the RNC and if the UE is in the
CELL_PCH and the UE is going to transmit uplink data or respond to the paging message, the
RNC instructs the UE to perform a P2D transition directly.
P2F P2F indicates a transition from CELL_PCH to CELL_FACH.
When the UE transmits heartbeat messages or traffic data, the RNC instructs the UE to enter the
CELL_FACH state.
F2D F2D indicates a transition from CELL_FACH to CELL_DCH.
When the fast dormancy UE is in the CELL_FACH state, the UE undergoes the following
transitions:
 If the UE reports event 4A to the RNC, the RNC instructs the UE to enter the CELL_DCH state
(F2D transition).
 If the UE reports event 4B to the RNC, the RNC instructs the UE to enter the CELL_PCH state
(F2P transition).
When the fast dormancy UE periodically sends small heartbeat messages, the normal state
transition mechanism changes the UE state from CELL_FACH to CELL_DCH. To prevent state
transitions from being triggered by a small number of heartbeat messages, a new threshold for
Event 4A is introduced: FastDormancyF2DHTvmThd.
To prevent too many UEs from remaining in the CELL_FACH state, fast dormancy ensures that
the state transition switch does not affect the 4A and 4B measurement or state transition from
CELL_FACH to another state for fast dormancy UEs.

WCDMA RAN
Fast Dormancy 5 Parameters
5-1
5 Parameters
Table 5-1 Parameter description
Parameter ID NE MML Command Description
FastDormancy BSC6900 ADD UIMEITAC(Optional)
MOD UIMEITAC(Optional)
Meaning: The switch of Fast Dormancy
function for one type UE.
GUI Value Range: OFF, ON
Actual Value Range: ON, OFF
Default Value: OFF
FastDormancyF
2DHTvmThd
BSC6900 SET
UUESTATETRANS(Option
al)
Meaning: This parameter specifies the
threshold of the traffic volume of 4A event for
triggering the transition of fast dormancy user
from FACH/E_FACH to DCH/HSPA.
GUI Value Range: D16, D32, D64, D128,
D256, D512, D1024, D2k, D3k, D4k, D6k, D8k,
D12k, D16k, D24k, D32k, D48k, D64k, D96k,
D128k, D192k, D256k, D384k, D512k, D768k
Actual Value Range: 16, 32, 64, 128, 256, 512,
1024, 2k, 3k, 4k, 6k, 8k, 12k, 16k, 24k, 32k,
48k, 64k, 96k, 128k, 192k, 256k, 384k, 512k,
768k
Default Value: D3k
NBMCacAlgoSw
itch
BSC6900 ADD
UCELLALGOSWITCH(Opt
ional)
MOD
UCELLALGOSWITCH(Opt
ional)
Meaning: The above values of the algorithms
represent the following information:
CRD_ADCTRL: Control Cell Credit admission
control algorithm.
Only when NODEB_CREDIT_CAC_SWITCH
which is set by the SET UCACALGOSWITCH
command and this switch are on,the Cell Credit
admission control algorithm is valid.
HSDPA_UU_ADCTRL: Control HSDPA UU
Load admission control algorithm. This swtich
does not work when uplink is beared on
HSUPA and downlink is beared on HSDPA.
HSDPA_GBP_MEAS: Control HSDPA
HS-DSCH Required Power measurement.
HSDPA_PBR_MEAS: Control HSDPA
HS-DSCH Provided Bit Rate measurement.
HSUPA_UU_ADCTRL: Control HSUPA UU
Load admission control algorithm. This switch
does not work when uplink is beared on
HSUPA and downlink is beared on HSDPA.
MBMS_UU_ADCTRL: Control MBMS UU Load
admission control algorithm.
HSUPA_PBR_MEAS: Control HSUPA
Provided Bit Rate measurement.
HSUPA_EDCH_RSEPS_MEAS: Control

WCDMA RAN
5-2
HSUPA Provided Received Scheduled EDCH
Power Share measurement.
EMC_UU_ADCTRL: Control power admission
for emergency user.
RTWP_RESIST_DISTURB: Control algorithm
of resisting disturb when RTWP is abnormal.
FACH_UU_ADCTRL: Admission control switch
for the FACH on the Uu interface. This switch
determines whether to admit a user in the RRC
state on the CELL_FACH.
1. If this switch is enabled: if the current
cell is congested due to overload, and the
users are with RAB connection requests or
RRC connection requests(except the cause of
""Detach"", ""Registration"", or ""Emergency
Call""), the users will be rejected. Otherwise
FACH user admission procedure is initiated. A
user can access the cell after the procedure
succeeds.
2. If this switch is disabled: FACH user
admission procedure is initiated without the
consideration of cell state.
MIMOCELL_LEGACYHSDPA_ADCTRL:
Legacy HSDPA admission control algorithm in
MIMO cell.
FAST_DORMANCY_ADCTRL: Whether to
enable or disable state transition of users in the
CELL-DCH state, who are enabled with fast
dormancy, to ease FACH congestion in a cell.
If this switch is turned off in a cell, state
transition of such users is disabled. Note that
when this switch is turned off in multiple cells
under an RNC, signaling storm may occur. As
a result, the CPU usage of the RNC, NodeB,
and SGSN increases greatly, leading to service
setup failure.
If switches above are selected, the
corresponding algorithms will be enabled;
otherwise, disabled.
GUI Value Range: CRD_ADCTRL(Credit
Admission Control Algorithm),
HSDPA_UU_ADCTRL(HSDPA UU Load
HSUPA_UU_ADCTRL(HSUPA UU Load
MBMS_UU_ADCTRL(MBMS UU Load
HSDPA_GBP_MEAS(HSDPA GBP Meas
Algorithm), HSDPA_PBR_MEAS(HSDPA PBR

WCDMA RAN
5-3
Meas Algorithm),
HSUPA_PBR_MEAS(HSUPA PBR Meas
Algorithm),
HSUPA_EDCH_RSEPS_MEAS(HSUPA
EDCH RSEPS Meas Algorithm),
EMC_UU_ADCTRL(emergency call power
admission), RTWP_RESIST_DISTURB(RTWP
Resist Disturb Switch),
FACH_UU_ADCTRL(FACH power cac switch),
MIMOCELL_LEGACYHSDPA_ADCTRL(Lega
cy HSDPA Admission Control Algorithm in
MIMO Cell ),
FAST_DORMANCY_ADCTRL(Fast Dormancy
User Admission Control Algorithm)
Actual Value Range: CRD_ADCTRL,
HSDPA_UU_ADCTRL, HSUPA_UU_ADCTRL,
MBMS_UU_ADCTRL, HSDPA_GBP_MEAS,
HSDPA_PBR_MEAS, HSUPA_PBR_MEAS,
HSUPA_EDCH_RSEPS_MEAS,
EMC_UU_ADCTRL,
RTWP_RESIST_DISTURB,
FACH_UU_ADCTRL,
MIMOCELL_LEGACYHSDPA_ADCTRL,
FAST_DORMANCY_ADCTRL
Default Value: None
PROCESSSWIT
CH
BSC6900 ADD UIMEITAC(Optional)
MOD UIMEITAC(Optional)
Meaning: 1) FD_P2D_SWITCH (TAC-Level
P2D Control Switch)
When the switch is turned on, state transition
from CELL_PCH/URA_PCH to CELL_DCH of
a UE is triggered if the following conditions are
met:
1. The TAC of the UE is the same as that
configured on the RNC.
2. The UE is in the CELL_PCH or URA_PCH
state, and the RNC receives a CELL UPDATE
message containing a cause value of "uplink
data transmission" or "PS paging response."
When the switch is turned off, state transition
from CELL_PCH/URA_PCH to CELL_DCH is
not triggered by the CELL UPDATE message
containing "uplink data transmission" or "PS
paging response."
In this case, however, the state transition can
be triggered by other factors in the system. For
example, if the UE is in the CELL_PCH or
URA_PCH state, the state transition to
CELL_DCH can be triggered by a CS
terminated call.
2) FD_TAC_FORCE_D2F_SWITCH
(TAC-based D2F Switch for UEs Supporting

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5-4
Fast Dormancy)
When the switch is turned on, state transition
from CELL_DCH to CELL_FACH is forcibly
performed on the UE with the corresponding
TAC and supporting fast dormancy.
When the switch is turned off, CELL_DCH to
CELL_PCH/URA_PCH state transition is
forcibly performed on the UE with the
corresponding TAC and supporting fast
dormancy.
GUI Value Range: FD_P2D_SWITCH,
RSVDBIT1_BIT2,
FD_TAC_FORCE_D2F_SWITCH,
RSVDBIT1_BIT4, RSVDBIT1_BIT5,
RSVDBIT1_BIT32
Actual Value Range: This parameter is set to 0
or 1 according to the related domains.
Default Value: None
PROCESSSWIT
CH
BSC6900 SET
URRCTRLSWITCH(Option
al)
Meaning: 1)INVOKE_TRACE_SWITCH.
When it is checked, RNC will start Invoke Trace
procedure upon receiving INVOKE TRACE
Message form CN, otherwise, RNC won't start
the Invoke Trace procedure though it receives
the INVOKE TRACE message.
2)SYS_INFO_UPDATE_FOR_IU_RST.
When it is checked, RNC will broadcast
SYSTEM INFORMATION messages to UE
when Iu reset, otherwise, RNC won't broadcast
SYSTEM INFORMATION messages to UE
when Iu reset.
3)DRNC_DIRECT_DSCR.
When it is checked, DRNC will start DSCR
procedure directly in RRC states other than
CELL_DCH, otherwise, DRNC will transfer
RRC CELL UPDATE message to SRNC.
4)RNC_SHARE_SWITCH.

WCDMA RAN
5-5
When it is checked, RNC traffic share function
will be valid, otherwise, RNC traffic function
cannot be used.
5)RNCAP_IMSI_HO_SWITCH.
When it is checked, Imsi handover function will
be used, otherwise it will be not used.
6)TERMINAL_VERSION_DEBASE_SWITCH.
When it is checked, terminal version R4 will
debase to R99.
7)SYS_HO_OUT_CIPHER_SWITCH.
When it is checked, the RNC will add ciphering
byte at GSM HANDOVER COMMAND if the
GSM system do not add any cipher information
at that message.
8)SYS_HO_CIPHER_CONFIG.
When it is checked, the cipher configuration in
the added cipher byte in GSM will be
A5/1.When it is no checked ,the cipher
configuration is A5/0.
9)ARRED_CELL_FOR_CSDOMAIN_RST.
When it is checked, cell will be bared when CS
domain is invalid, otherwise the CS domain will
be bared when CS domain is invalid. It is
invalid If SYS_INFO_UPDATE_FOR_IU_RST
is not checked.
10)CR2284R1_SWITCH.
In section 8.6.6.28 of TS25.331 of R5
Before2006, it describes that the HFN should
add one when UE is ciphering in the situation
of Timing re-initialized hard handover, while not
specified in RB SETUP process in the section
of 8.6.4.3. so it is not clear whether to add or
not in RB SETUP in DRD scenarios.
CR2284R1 clarify that HFN should add one in
RB SETUP process with Timing re-initialized
hard handover. when it is checked ,RNC
accepts this CR2284R1; when it is not
checked ,RNC does not accept this
CR2284R1.
11)CDT_MSG_FULL_TRACE.
When it is checked, CDT trace function which
starts tracing from message RRC CONNECT
REQUEST.
12)CR2284R1_COMPATIBLE_SWITCH.
CR2284R1 causes the compatible problem. if
UE is not consistent with RNC regarding
whether accept the CR2284R1 or not, it will
cause the problem of streaming when UEs are

WCDMA RAN
5-6
communicating with each other. So RNC
creates this switch. when it is checked, RNC is
auto-adaptive to accept the CR2284R1
according to UE version information. The
principles that RNC judges UE whether to
accept the CR2284R1 are as follows: R5 and
above UE accepts the CR; R99/R4 UE, if it
receives the START LIST value from RB
SETUP COMPLETE,RNC figures that UE
accepts the CR; R99/R4 UE, if it only receives
the START value from RB SETUP
COMPLETE,RNC figures that UE does not
accept the CR; when it is not checked, whether
RNC accept the CR or not is according to
CR2284R1_SWITCH. The relations between
these two switches CR2284R1_SWITCH and
CR2284R1_COMPATIBLE_SWITCH are as
follows:
(1)CR2284R1_COMPATIBLE_SWITCH is
checked, RNC is self-compatible, so the
CR2284R1_SWITCH is invalid;
(2)CR2284R1_COMPATIBLE_SWITCH is not
checked, the CR2284R1_SWITCH is valid.
13)COMBINE_OPERATION_DRD_SWITCH.
When it is on, RNC will not reject the message
RB SETUP CMP without the IE active time.
14)UL_INTER_PROTECT_SWITCH.
When the switch is off, RNC will not do integrity
protection check for uplink RRC messages.
15)FAST_DORMANCY_SWITCH.
When it is checked, RNC will apply FAST
DORMANCY function.
16)SYS_HO_IN_CIPHER_SWITCH.
When it is checked, don't receive the encrypted
ability information from RELOC REQ ,default
configured of encrypted parameter are UIA1
and UEA0.
17)PTT_EARLY_TRANS_SWITCH_OFF.
When it is checked, PTT user will not apply the
early transmission function, otherwise, PTT
user will apply the early transmission function.
18)UPLINK_MDC_ENHENCEMENT_SWITCH
.
This switch has become invalid.
19)NODEB_PRIVATE_INTERFACE_SWITCH.
When it is checked, the NodeB private
interface data can be taken to the NodeB
through the IUB protocol message.

WCDMA RAN
5-7
20)PTT_SPEC_LI_SWITCH_OFF.
When it is checked, special LI will not be used
for PTT user, otherwise, special LI will be used
for PTT user.
21)RNC_DF_2_URA_PCH_SWITCH.
When it is checked, RNC will support
transferring Fast Dormancy UE from
CELL_DCH or CELL_FACH to URA_PCH.
When it is not checked, RNC will not support
transferring Fast Dormancy UE from
CELL_DCH or CELL_FACH to URA_PCH.
22)FD_TAC_MATCH_SWITCH.
When it is checked, RNC will apply FAST
DORMANCY function for UE whose TAC is
configured in database. When it is not checked,
RNC will apply FAST DORMANCY function for
UE whose version is R5 or later.
GUI Value Range: INVOKE_TRACE_SWITCH,
SYS_INFO_UPDATE_FOR_IU_RST,
DRNC_DIRECT_DSCR,
RNC_SHARE_SWITCH,
RNCAP_IMSI_HO_SWITCH,
TERMINAL_VERSION_DEBASE_SWITCH,
SYS_HO_OUT_CIPHER_SWITCH,
SYS_HO_CIPHER_CONFIG,
BARRED_CELL_FOR_CSDOMAIN_RST,
CR2284R1_SWITCH,
CDT_MSG_FULL_TRACE,
CR2284R1_COMPATIBLE_SWITCH,
COMBINE_OPERATION_DRD_SWITCH,
UL_INTER_PROTECT_SWITCH,
FAST_DORMANCY_SWITCH,
SYS_HO_IN_CIPHER_SWITCH,
PTT_EARLY_TRANS_SWITCH_OFF,
UPLINK_MDC_ENHENCEMENT_SWITCH,
NODEB_PRIVATE_INTERFACE_SWITCH,
PTT_SPEC_LI_SWITCH_OFF,
RNC_DF_2_URA_PCH_SWITCH,
FD_TAC_MATCH_SWITCH
Default Value: None
PsInactTmrForF
stDrmDch
BSC6900 SET
UPSINACTTIMER(Optiona
l)
Meaning: This parameter specifies the value of
the CELL-DCH inactivity timer for UEs enabled
with the Fast Domancy feature. When
detecting that the Fast Domancy User in PS
domain had no data to transfer in CELL-DCH
for a long time which longer than this timer, the
state transition from CELL-DCH to
CELL-FACH or CELL-PCH is triggered. To

WCDMA RAN
5-8
enable this timer, set this timer to a value other
than 0.
GUI Value Range: 0~64800
Actual Value Range: 0~64800
Default Value: 4
PsInactTmrForF
stDrmFach
BSC6900 SET
l)
the CELL-FACH inactivity timer for UEs
enabled with the Fast Dormancy feature. When
detecting that the Fast Dormancy User in PS
domain had no data to transfer in CELL-FACH
state transition from CELL-FACH to CELL-PCH
is triggered. To enable this timer, set this timer
to a value other than 0.
Default Value: 10
PsInactTmrForP
reFstDrm
BSC6900 SET
l)
the CELL-PCH inactivity timer for UEs enabled
with the Fast Dormancy feature. When
detecting that the Fast Dormancy User in PS
domain had no data to transfer in CELL-PCH
UE is released. To enable this timer, set this
timer to a value other than 0.
Default Value: 360
ReservedSwitch
0
BSC6900 SET
UCORRMALGOSWITCH(
Optional)
Meaning: CORRM algorithm reserved switch 0.
The switch is reserved for further change
request use.
1) RESERVED_SWITCH_0_BIT2: When the
switch is set to ON, only uplink RLC or
downlink RLC can be re-established during the
state transition from CELL_FACH to
CELL_DCH (F2D for short).
switch is set to ON, signaling radio bearers
(SRBs) cannot be changed from DCHs to
HSPA channels (including the channel change
from DCH to E-DCH in the uplink and from
DCH to HS-DSCH in the downlink) during
directed retry.
switch is turned on, the RNC does not consider
whether the cell is congested during AMR
service establishment. That is, parameters are

WCDMA RAN
5-9
set on the precondition that the cell is not
congested. This prevents inconsistency in
uplink and downlink AMR modes.
switch is set to ON, the RNC establishes the
BE service of a UE on R99 channels instead of
on HSUPA channels if the uplink coverage of
the UE is limited. The RNC determines whether
the uplink coverage of a UE is limited on the
basis of the Ec/N0 reported by the UE during
RRC connection establishment.
switch is set to ON, the directed retry algorithm
based on downlink load balance is enabled.
When the switch is set to OFF, this algorithm is
disabled. This algorithm is an optimization of
the original downlink load balance algorithm.
switch is set to ON, BE services that are
already established on E-DCHs can be
re-established on DCHs due to insufficient
coverage.
switch is turned on, D2F state transition is
allowed regardless of whether the CCCH exists
on the Iur interface. If D2F state transition fails,
DSCR is triggered. When the switch is turned
off, the RNC needs to determine whether the
CCCH exists on the Iur interface before
determining whether to trigger D2F state
transition.
switch is set to ON, the uplink 0 kbit/s transport
format of subflow A of an AMR service (WB
AMR service or NB AMR service) is 0*TbSize.
When the switch is set to OFF, the uplink 0
kbit/s transport format of subflow A of an AMR
service is 1*0.
switch is turned on, multiple cross-Iur radio
links (RLs) belonging to the same DRNC can
be added simultaneously. If an RL fails to be
added with the failure cause of
RadioNetwork:unspecified (14), the RNC
attempts to reestablish the RL for only once.
switch is turned on, the PS service must be
carried by DCHs in the uplink if both CS and
PS services exist.
switch is turned on, the PS service must be

WCDMA RAN
5-10
carried by DCHs in the downlink if both CS and
PS services exist.
GUI Value Range:
RESERVED_SWITCH_0_BIT1,
RESERVED_SWITCH_0_BIT32
Actual Value Range:

WCDMA RAN
5-11
RESERVED_SWITCH_0_BIT32
Default Value: None
RsvdPara1 BSC6900 SET
URRCTRLSWITCH(Option
al)
Meaning: 2) NAS_QOS_MOD_SWITCH (QoS
Change Switch for NAS)
When the switch is turned on, for UEs whose
HS-DSCH category is smaller than 13, if the
maximum downlink rate specified in the PDP
activation requests from the UEs exceeds 16
Mbit/s, the requests are sent to the CN after the
rate is changed to 16 Mbit/s.
When the switch is turned off, the PDP
activation requests are sent to the CN without
changing the maximum downlink rate.
15) RSVDBIT1_BIT15 (Reserved Parameter 1
Bit 15)
When the switch is turned on, the RNC enables
the function of AMR mute detection.
When the switch is turned off, the RNC
disables the function of AMR mute detection.
Bit 16)
When the switch is turned on, the RNC can
perform DRDs during the P2D procedure.
When the switch is turned off, the RNC cannot
perform DRDs during the P2D procedure.
17) SYSHO_CSIN_PERMIT_SWITCH
(2G-to-3G CS Handover Switch)
When the switch is turned on, inter-RAT CS
handovers from 2G cells to 3G cells are
allowed.
When the switch is turned off, inter-RAT CS
handovers from 2G cells to 3G cells are not
allowed.

WCDMA RAN
5-12
Bit 20)
When the switch is turned on, for UEs that
support fast dormancy and are in the
CELL_PCH state, the RNC performs the
CELL_PCH-to-CELL_FACH (P2F for short)
procedure if the UEs perform cell update with
the cause value "uplink data transmission" or
"paging response."
When the switch is turned off, for UEs that
support fast dormancy and are in the
CELL_PCH state, the RNC performs the P2D
procedure if the UEs perform cell update with
the cause value "uplink data transmission" or
"paging response."
Bit 21)
When the switch is turned on, for UEs that are
establishing AMR services and shifting from
the CELL_FACH state to the CELL_DCH state,
the RNC stops establishing AMR services to
handle cell update if the RNC receives from the
UEs a cell update message containing the
cause value "cell reselection."
When the switch is turned off, for UEs that are
establishing AMR services and shifting from
the CELL_FACH state to the CELL_DCH state,
if the RNC receives from the UEs a cell update
message containing the cause value "cell
reselection," the RNC stops establishing AMR
services to handle cell update and resumes
AMR services only after cell update is
completed.
Bit 22)
When the switch is turned on, the RNC does
not trigger cell update with the cause value "RL
Failure" if the RNC detects interrupted
downlink transmission on SRB2.
When the switch is turned off, the RNC triggers
cell update with the cause value "RL Failure"
and reestablishes radio links if the RNC detects
interrupted downlink transmission on SRB2.
Bit 23)
not trigger cell update with the cause value "RL
Failure" reported by a UE if the associated
NodeB reports to the RNC that all radio links
for the UE experience synchronization loss.
When the switch is turned off, the RNC triggers

WCDMA RAN
5-13
cell update with the cause value "RL Failure"
reported by a UE and reestablishes radio links,
if the associated NodeB reports to the RNC
that all radio links for the UE experience
synchronization loss.
Bit 24)
When the switch is turned on, for UEs using CS
services, the RNC does not trigger cell update
with the cause value "RL Failure" reported by a
UE, if the RNC detects interrupted downlink
transmission on SRB2, or if the associated
NodeB reports to the RNC that all radio links
for the UE experience synchronization loss.
When the switch is turned off, for UEs using CS
services, the RNC triggers cell update with the
cause value "RL Failure" reported by a UE and
reestablishes radio links, if the RNC detects
interrupted downlink transmission on SRB2, or
Bit 25)
When the switch is turned on, for UEs using PS
services only, the RNC does not reestablish
radio links for a UE if the RNC detects
When the switch is turned off, for UEs using PS
services only, the RNC triggers cell update with
the cause value "RL Failure" reported by a UE
and reestablishes radio link, if the RNC detects
Bit 26)
not reestablish radio links for a UE if the UE
reports to the RNC cell update caused by SRB
reset.
reestablishes radio links for a UE if the UE
reports to the RNC cell update caused by SRB
reset.

WCDMA RAN
5-14
Bit 28)
When the switch is turned on, for UEs using CS
services, if a NodeB reports to the RNC that all
radio links for a UE experience synchronization
loss, the RNC starts the RL Restore timer
whose duration is specified by the RlRstrTmr
parameter in the SET USTATETIMER
command. After the timer has expired, the
RNC triggers cell update with the cause value
"radio link failure" and reestablishes radio links
for the UE.
When the switch is turned off, for UEs using CS
services, if a NodeB reports to the RNC that all
radio links for a UE experience synchronization
loss, the RNC starts the RL Restore timer
whose duration is specified by the T313
parameter in the SET UCONNMODETIMER
command. After the timer has expired, the
RNC triggers cell update with the cause value
"radio link failure" and reestablishes radio links
for the UE.
Bit 29)
performs the CELL_DCH-to-CELL_FACH (D2F
for short) procedure on UEs that support fast
dormancy.
When the switch is turned on, the RNC
performs the CELL_DCH-to-CELL_PCH (D2P
for short) procedure on UEs that support fast
dormancy.
GUI Value Range: RSVDBIT1_BIT1,
NAS_QOS_MOD_SWITCH, RSVDBIT1_BIT3,
RSVDBIT1_BIT16,
SYSHO_CSIN_PERMIT_SWITCH,
RSVDBIT1_BIT32

WCDMA RAN
5-15
Default Value: None
TAC BSC6900 ADD
UIMEITAC(Mandatory)
MOD
UIMEITAC(Mandatory)
RMV
UIMEITAC(Mandatory)
Meaning: Type Allocation Code (TAC) is part of
the International Mobile Station Equipment
Identity (IMEI), it is used to identify the type of
the UE.
Default Value: None

WCDMA RAN
Fast Dormancy 6 Counters
6-1
6 Counters
Table 6-1 Counter description
Counter ID Counter Name Counter
Description
Feature ID Feature
Name
73391137 VS.RRC.SigConnRelInd.UEPSDataEndNumber of RRCs
Release Due to
Receiving
SIGNALLING
CONNECTION
RELEASE
INDICATION
message with
cause of "UE
Requested PS
Data session
end" for cell
WRFD-020500 Enhanced
Fast
Dormancy

WCDMA RAN
Fast Dormancy 7 Glossary
7-1
7 Glossary
For the acronyms, abbreviations, terms, and definitions, see the Glossary.

WCDMA RAN
Fast Dormancy 8 Reference Documents
8-1
8 Reference Documents
[1] State Transition Feature Parameter Description
[2] 3GPP TS 25.331
[3] 3GPP TS 23.003

Fast dormancy

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