zte umts amr-nb & amr-wb feature guide_v6.1_201204.pdf
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AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 1
AMR-NB&AMR-NB Feature Guide
Version Date Author Reviewer Notes
V5.0 2011-1-20 Huang He NuLi
1. Modify some description ,Add
description of some parameters
2. Add description about the initial AMR
rate selection based on cell load and
the GBR reservation for the AMR
service and relative parameters;
3. Modify the dynamic AMR adaptation
based on uplink and downlink
transmit power according the
optimization of measurement
procedure.
V6.0 2011-7-20 Huang He NuLi No modification, just version change.
V6.1 2012-1-14 Huang He NuLi Change NbDMCfgNote for EvtAbTcpThrd as
7
© 2012 ZTE Corporation. All rights reserved.
ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used
without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document is subjected to
change without notice.
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 2
TABLE OF CONTENTS
1 Functional Attribute .............................................................................................. 4
2 Overview ................................................................................................................. 4
2.1 Function Introduction ............................................................................................... 4
2.1.1 CS Conversational RAB for AMR-NB Speech ........................................................ 7
2.1.2 WB-AMR Speech Support ....................................................................................... 7
2.1.3 AMR Rate Controlling .............................................................................................. 7
2.1.4 TrFO ......................................................................................................................... 8
3 Technical Description ........................................................................................... 9
3.1 CS Conversational RAB for AMR-NB Speech ........................................................ 9
3.1.1 Implementation Mechanism of CS Conversational RAB for AMR-NB Speech ...... 9
3.1.2 Signaling Flow of AMR Service ............................................................................. 11
3.2 WB-AMR Speech Support ..................................................................................... 12
3.2.1 Implementation Mechanism of AMR-WB Functions ............................................. 12
3.3 AMR Rate Controlling ............................................................................................ 14
3.3.1 Classification of Dynamic AMR Adaptation ........................................................... 14
3.3.2 Dynamic AMR Adaptation Based on Single-Link Transmission Power................ 16
3.3.3 Dynamic Adjustment Triggered by Resource Congestion .................................... 20
3.3.4 Dynamic Adjustment Triggered by Load ............................................................... 20
3.3.5 Initial AMR Rate Selection Based on Cell Load .................................................... 20
3.3.6 GBR Reservation for the AMR service .................................................................. 21
3.4 TrFO Support ......................................................................................................... 22
3.4.1 OoBTC Outband Codec Control ............................................................................ 23
3.4.2 IuUP Initialization ................................................................................................... 24
3.4.3 IuUP Rate Control .................................................................................................. 25
4 Parameters and Configuration........................................................................... 27
4.1 Parameter List of AMR Dynamic Rate Adjustment ............................................... 27
4.2 Configuration of AMR Dynamic Rate Adjustment Parameters ............................. 29
5 Counter and Alarm .............................................................................................. 44
5.1 Counter List ............................................................................................................ 44
5.2 Alarm List ............................................................................................................... 48
6 Glossary ............................................................................................................... 49
AMR-NB&AMR-NB Feature Guide
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FIGURES
Figure 3-1 Signaling Flow of AMR Service ........................................................................... 11
Figure 3-2 Flow of OoBTC Outband Codec Control ............................................................. 24
Figure 3-3 IuUP Initialization ................................................................................................. 25
Figure 3-4 Flow of IuUP Rate Control ................................................................................... 26
TABLES
Table 2-1 AMR-NB Rate Classification ................................................................................... 5
Table 2-2 AMR-WB Rate Classification .................................................................................. 6
Table 4-1 Parameter List ....................................................................................................... 27
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1 Functional Attribute
System version: [RNC V3.11.10/V4.11.10, OMMR V3.11.10/V4.11.10, Node B V4.11.10,
OMMB V4.11.10]
Attribute: [Optional]
NEs involved:
UE NodeB RNC MSCS MGW SGSN GGSN HLR
√ - √ √ √ - - √
Note:
*-: No NE is involved.
*√: An NE is involved.
Dependency: [None]
Mutual exclusion: [None]
Remarks: [None]
2 Overview
2.1 Function Introduction
The present 3GPP employs narrowband AMR (AMR-NB) and wideband AMR
(AMR-WB). For the AMR-NB, the speech channel bandwidth is limited to 3.7 kHz, and
the sampling frequency is 8,000 Hz. For the AMR-WB, the speech channel bandwidth is
up to 7 kHz, and the sampling frequency is up to 16,000 Hz. The AMR-WB has better
speech quality than the AMR-NB, although the two modes have the same frame length
of 20ms.
AMR is introduced into the 3G system based on the following considerations :
By means of the AMR Control (AMRC), voice rate can be reduced to improve voice
quality. In addition, system load can be effectively lightened. In the case of certain
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radio load, if users want to obtain the optimal subjective feeling of voice quality, the
most suitable AMR is not the maximum rate, but a suitable medium rate. By
weighing load, the AMRC can achieve the following goals:
The AMRC can reduce an AMR when load is heavy. This lightens system load
and improves voice quality.
The AMRC can increase an AMR when load is light. In this way, QoS is greatly
improved.
When uplink coverage is limited, AMR can be reduced to effectively widen uplink
coverage. In initial WCDMA network construction, both uplink coverage and
downlink capacity are limited; therefore, it is especially important to widen uplink
coverage.
The Adaptive Multi-Rate (AMR) is also called the AMR-NB (Narrowband). This service
has three service RBs, and can provide eight speech rates and two mute rates, as shown
in the table:
Table 2-1 AMR-NB Rate Classification
AMR
Codec Mode
Total
Number
of Bits
Sub-flow
1
Sub-flow
2
Sub-flow
3
Codec Mode
AMR 4.75 kbps 95 42 53 0 AMR_4.75
AMR 5.15 kbps 103 49 54 0 AMR_5.15
AMR 5.9 kbps 118 55 63 0 AMR_5.90
AMR 6.7 kbps 134 58 76 0 AMR_6.70
AMR 7.4 kbps 148 61 87 0 AMR_7.40
AMR 7.95 kbps 159 75 84 0 AMR_7.95
AMR 10.2 kbps 204 65 99 40 AMR_10.20
AMR 12.2 kbps 244 81 103 60 AMR_12.20
AMR SID 39 39 0 0 AMR_SID
GSM-EFR SID 43 43 0 0 GSM-EFR SID
*SID (Silence Descriptor)
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AMR-NB voice coding is divided into three sub-flows out of consideration for the
importance of information and error tolerance in voice coding. Each sub-flow requires its
own QoS assurance. Sub-flow 1 is the most important. Sub-flow 2 comes next. Sub-flow
3 is the least important. Sub-flow 1 needs better channel coding at the air interface to
guarantee its accuracy. No data rate is the coding in the case of mute. SID uses this
frame to indicate that current voice is not activated.
AMR-WB is short for Adaptive Multi-Rate Wideband. This service was introduced in 1999
in order to provide better speech quality and speech reproducibility. It can be applied
both in 3G system and GSM system.
Unlike AMR-NB, the AMR-WB has only two service RBs and provides nine speech rates
and one mute rate, as shown in the table:
Table 2-2 AMR-WB Rate Classification
AMR-WB
Codec Mode
Total
Number of
Bits
Sub-flow
1 Sub-flow
2
Sub-flow
3
Codec Mode
1.75 40 40 0 0 AMR-WB_SID*
6.60 132 54 78 0 AMR-WB_6.60
8.85 177 64 113 0 AMR-WB_8.85
12.65 253 72 181 0 AMR-WB_12.65
14.25 285 72 213 0 AMR-WB_14.25
15.85 317 72 245 0 AMR-WB_15.85
18.25 365 72 293 0 AMR-WB_18.25
19.85 397 72 325 0 AMR-WB_19.85
23.05 461 72 389 0 AMR-WB_23.05
23.85 477 72 405 0 AMR-WB_23.85
*SID (Silence Descriptor)
Like the AMR-NB, the AMR-WB sub-flow 1 contains the most important information of
speech, with 12-bit CRC protection added on the air interface. The sub-flow 2 contains
less important speech information, without CRC protection on the air interface.
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2.1.1 CS Conversational RAB for AMR-NB Speech
ZTE equipment supports all the eight AMR-NBs: 12.2kbps, 10.2kbps, 7.95kbps, 7.4kbps,
6.7kbps, 5.9kbps, 5.15kbps, and 4.75kbps. Which rate (s) to be used is same as the
rate(s) in RAB Assignment from CN. ZTE equipment supports DTX and SID.
The RAB parameters of ZTE RAN equipment, used to bear session AMR services, follow
the definition in the 3GPP TS 34.108.
2.1.2 WB-AMR Speech Support
ZTE RAN equipment supports all the nine speech rates of WB-AMR session, that is,
23.85kbps, 23.05kbps, 19.85kbps, 18.25kbps, 15.85kbps, 14.25kbps, 12.65kbps,
8.85kbps, 6.6kbps, together with the mute rate 1.75 kbps. The rate-(s) to be used is the
same as the rate(s) in RAB Assignment from CN. ZTE RNC enables and disables the
function of WAMR by the parameter WAMRSUPIND.
ZTE RNC does not support RAB negociation between AMR-NB and AMR-WB. When the
AMR-WB can not be established because of resources congestion, it is not supported to
establish AMR-NB by RAB negociation.
The RAB parameter of ZTE RAN equipment, used to bear session AMR-WB services,
follow the definition in the 3GPP TS 34.108.
2.1.3 AMR Rate Controlling
In WCDMA system, the radio environment between UE and a base station always
changes. When a UE is far away from the base station or the radio environment
degrades, the base station or UE is bound to transmit at a higher power under the action
of closed-loop power control in order to guarantee the QoS of AMR service. The power
change and power increase at this time may result in sharp increase in power and further
deterioration of the radio environment. As a result, the system capacity decreases and
even when the power is increased to a certain limit value, QoS requirements of service
can not be satisfied.
ZTE RNC equipment can monitor the uplink transmission power of UE in a UE internal
measurement report or the downlink transmission power of a Node B dedicated
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measurement report base station. When the uplink or downlink transmission power rises
to a certain threshold, the RNC will automatically adjust this user's AMR to reduce the
power necessary for service. That is, a conversation is most probably kept going by
reducing voice quality. When the radio environment between UE and the base station is
good and the transmission power of the base station or UE decreases to a certain
threshold, AMR can be increased to provide users with better voice quality as long as
the system is neither overload nor congested.
In addition, when a cell evaluated by means of downlink transmission power and uplink
interference has high downlink load and uplink load, ZTE RNC equipment can lighten the
cell load by reducing the AMR of some low-priority users, so as to accommodate more
users.
The actual AMR which can be adjusted by the RNC must belong to the AMR code set
configured for users by the CN during call establishment. The voice quality when low-rate
AMR coding is used is not as good as that when high-rate AMR coding is used, but
low-rate AMR coding has higher capacity (number of users ) and wider coverage than
high-rate AMR coding. Analysis of simulation result shows that there is about 30%
coverage radius gain when the lowest AMR-NB (4.75kbps) instead of the highest
AMR-NB (12.2kbps) is used. When the lowest AMR-NB is used, a cell will accommodate
twice as many users as those when the highest AMR-NB is used.
2.1.4 TrFO
WCDMA employs AMR compressed voice encoding. At the R99 stage, TDM bearer is
used between CS core network devices, and voice must employ 64kbit/s PCM encoding.
One very important function of the R99 MSC is voice Transcoder (TC), which converts
the AMR voice codes of a mobile terminal into PCM codes and transmits them over a
network. The calls between mobile users require two voice encoding/decoding
conversions, that is, AMR-PCM-AMR. Frequent encoding/decoding reduces voice
quality.
In view of this, the 3GPP organization has introduced the Tandem Free Operation (TFO)
and Transcoder Free Operation (TrFO) in the R4 protocol to avoid voice
encoding/decoding. Meantime, the TFO and TrFO help save the transmission network
bandwidth between core networks. The differences between both technologies are as
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follows: The TFO still needs TC resource. After call establishment, a direct connection is
established between the TCs of the calling and called MSCs by means of in-band
signaling negotiation to bypass encoding/decoding. The TrFO does not need any TC
resource at all. It means that outband signaling encoding/decoding function (OoBTC) is
used during call establishment to implement consistent voice encoding/decoding
negotiation between UE and network.
The TFO technology is implemented in the core network equipment. It does not need the
participation of RAN equipment. The TrFO technology requires that RAN equipment
should support outband voice encoding negotiation and the processing related to a user
plane. Both the TFO and TrFO can also be used for AMR-WB encoding.
ZTE RAN equipment supports the TrFO function and complies with the 3GPP TS 23.153
and TS 25.415.
3 Technical Description
3.1 CS Conversational RAB for AMR-NB Speech
3.1.1 Implementation Mechanism of CS Conversational RAB for AMR-NB
Speech
Selection of AMR-NB Rates
Function description: The 3GPP protocol defines eight speech rates and two mute
rates for AMR-NB, which supports the speech rate up to 12.2kbps. A database
saves all the rate configuration combinations of AMR-NB. According to the
maximum rate of AMR-NB in a CN assignment message, the RNC searches for
corresponding configuration information from the database.
Setup of Single AMR-NB Service and Concurrence with the PS Service
Function description: This function supports the setup of a single AMR-NB service
and the concurrency of AMR-NB and PS services.
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Three Service RBs Established for the AMR-NB
Function description: This function supports service transformation by means of
three service RBs reconfiguration.
Mobility of AMR-NB
Function description: This function supports soft handover, hard handover, and
relocation of AMR-NB service, and handover between 2G and 3G.
Directed Retry of the AMR-NB Service During Assignment
Function description: This function supports directed retry of AMR-NB service
during service assignment.
Default Configuration of AMR-NB rates: 12.2k, 12.2/7.95/5.9/4.75k and 7.95kbps.
Function description: This function supports the default configuration of AMR-NB
rates: 12.2k, 12.2/7.95/5.9/4.75k and 7.95kbps. It is used for the handover between
2G and 3G. The RNC establishes bearer according to this default configuration,
sets the default configuration in the HANDOVER TO UTRAN COMMAND message,
and sends this message to the UE through the 2G network.
RAB Modification of AMR-NB
Function description: This function does not support RNC initiates the RAB
modification of AMR-NB service; it supports CN initiates the RAB modification of
AMR-NB service. At present, the main scenarios for the CN to initiate RAB
modification to the AMR-WB include the TFO or TrFO conditions satisfied after
performance of handover, call forwarding, and intelligent service.
Dynamic Rate Adjustment for AMR-NB Service
Function description: This function supports dynamic rate adjustment for the
AMR-NB service triggered by link level, resource congestion, and load control . If the
rate adjustment threshold is met, the uplink rate is controlled by the RNC through
the TFC Control, and the downlink rate is controlled by the RNC through the Iuup
reverse rate control frame.
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3.1.2 Signaling Flow of AMR Service
The setup flow of the AMR-WB and AMR-NB services is practically identical to that of
common services. The following example demonstrates the setup flow of the DCH
service in the synchronous mode.
Figure 3-1 Signaling Flow of AMR Service
6. Downlink Synchronisation
7. Uplink Synchronisation
UE Node B
Serving RNS
Serving
RNC
CN
RRC RRC
10. DCCH : Radio Bearer Setup Complete
NBAP NBAP 4. Radio Link Reconfiguration Ready
DCH-FP
NBAP NBAP 8. Radio Link Reconfiguration Commit
RRC RRC
9. DCCH : Radio Bearer Setup
Apply new transport format set
Select L1, L2 and Iu Data
Transport Bearer parameters
RANAP RANAP
11. RAB Assignment
Response
5. ALCAP Iub Data Transport Bearer Setup
2. ALCAP Iu Data
Transport Bearer Setup
Not required towards PS
domain
RANAP RANAP
1. RAB Assignment
Request
[Establishment]
NBAP NBAP 3. Radio Link Reconfiguration Prepare
[DCH Addition]
DCH-FP DCH-FP
DCH-FP
1 CN initiates establishment of the radio access bearer with RANAP message Radio
Access Bearer Assignment Request. Parameters: Radio Access Bearer
parameters, User Plane Mode, Transport Address, Iu Transport Association.
2 SRNC initiates set-up of Iu Data Transport bearer using ALCAP protocol. This
request contains the AAL2 Binding Identity to bind the Iu Data Transport Bearer to
the Radio Access Bearer (this step is not required towards PS domain).
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3 SRNC requests its Node B to prepare establishment of DCH to carry the radio
access bearer (Radio Link Reconfiguration Prepare ). Parameters: Transport
Format Set, Transport Format Combination Set, Power control information.
4 Node B allocates resources and notifies SRNC that the preparation is ready (Radio
Link Reconfiguration Ready). Parameters: Transport layer addressing information
(AAL2 address, AAL2 Binding Id) for Iub Data Transport Bearer.
5 SRNC initiates the setup of Iub Data Transport Bearer using ALCAP protocol. This
request contains the AAL2 Binding Identity to bind the Iub Data Transport Bearer to
DCH.
6 The Node B and SRNC establish synchronism for the Iub and Iur Data Transport
Bearer by means of exchange of the appropriate DCH Frame Protocol frames
Downlink Synchronization.
7 The Node B and SRNC establish synchronism for the Iub and Iur Data Transport
Bearer by means of exchange of the appropriate DCH Frame Protocol frames
Uplink Synchronization.
8 NBAP message Radio Link Reconfiguration Commit is sent from SRNC to Node
B.
9 RRC message Radio Access Bearer Setup is sent by SRNC to UE. Parameters:
Transport Format Set, Transport Format Combination Set.
10 UE sends RRC message Radio Access Bearer Setup Complete to SRNC.
11 SRNC sends RANAP message Radio Access Bearer Assignment Response to CN.
3.2 WB-AMR Speech Support
3.2.1 Implementation Mechanism of AMR-WB Functions
Selection of AMR-WB Rates
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Function description: ZTE through configuring the parameter WAMRSUPIND to
support the WB-AMR. The protocol 26.201 defines nine speech rates and one mute
rate for AMR-WB, which supports the maximum speech rate of 23.85kbps. The
database, with the AMR-WB service added, needs to save all AMR-WB rate
configuration combinations. According to the maximum AMR-WB rate in the
message assigned by the CN, the RNC searches for corresponding configuration
information from the database.
Note: The AMR-WB supports the voice bandwidth 50Hz-7kHz (the AMR-NB
supports the voice bandwidth 200Hz-3.4kHz); therefore, it has better voice quality
than the AMR-NB. Among the rates (23.85 kbps, 23.05 kbps, 19.85 kbps, 18.25
kbps, 15.85 kbps, 14.25 kbps, 12.65 kbps, 8.85 kbps, and 6.6 kbps) supported by
the AMR-WB, 12.65kbps is the minimum rate that can achieve high-quality sound
effects. The MOS values of 6.6 kbps, 8.85 kbps, and 12.65 kbps apparently
increase as the rate rises. The MOS values of 12.65kbps, 14.25kbps, 15.85kbps,
18.25kbps, and 19.85kbps do not apparently increase as the rate rises. So the rates
of 12.65 kbps, 8.85 kbps, and 6.6 kbps are recommended by 3GPP.
Setup of Single AMR-WB Service and Concurrency with PS Service
Function description: The setup of a single AMR-WB service and the concurrency
of the AMR-WB and PS services are supported in the same way as the AMR-NB.
Three Service RBs Established for AMR-WB
Function description: Originally, the AMR-WB had only two service RBs while the
AMR-NB had three. For easy conversion between these two services through
reconfiguration, the 3GPP 25.331 and 34.108 specifications related to the AMR-WB
recommend configuration of three service RBs. The service sub-flow associated
with the third RB does not exist in the Iu port, and its actual data volume is 0 (0 ×
60). The RNC requires special processing, that is, the Iu port still supports two
service sub-flows, while the Iuup port needs to support the interconnection between
two service sub-flows and three service RBs.
Mobility of AMR-WB
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Function description: Like the AMR-NB control policy, this function supports soft
handover, hard handover, relocation, and 2G-3G handover for the AMR-WB service.
This function uses the present parameters without new handover parameter added.
Directed Retry of AMR-WB Service During Assignment
Function description: Like the AMR-NB control policy, this function supports
directed retry of the AMR-WB service during service assignment. This function uses
the present parameters without new load balancing parameter added.
RAB Modification of AMR-WB
The RNC is not supported to initiate RAB modification to the AMR-WB service,
while the CN is supported to initiate the RAB modification to the AMR-WB, which is
performed in a way similar to that of the AMR-NB. At present, the main scenarios
for the CN to initiate RAB modification to the AMR-WB include the TFO or TrFO
conditions satisfied after performance of handover, call forwarding, and intelligent
service.
Dynamic Rate Adjustment for AMR-WB Service
Function description: Like the AMR-NB control policy, this function supports the
dynamic rate adjustment for the AMR-WB service triggered by link level, resource
congestion, and load control. This function uses the present parameters without
new load control parameter added. If the rate adjustment threshold is met, the
uplink rate is controlled by the RNC through the TFC Control, and the CN downlink
rate is controlled by the RNC through the Iuup reverse rate control frame.
3.3 AMR Rate Controlling
3.3.1 Classification of Dynamic AMR Adaptation
According to the types of AMR, dynamic AMR adaptation is classified into AMR-NB
dynamic rate adjustment and AMR-WB dynamic rate adjustment. The AMR-WB rate
adjustment principles and steps are the same as those of the AMR-NB. In Iuup Version1,
ZTE RNC configures the AMR-NB rates by the parameters AmrNbMode0UseTag,
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AmrNbMode1UseTag, AmrNbMode2UseTag, AmrNbMode3UseTag,
AmrNbMode4UseTag, AmrNbMode5UseTag, AmrNbMode6UseTag and
AmrNbMode7UseTag. And ZTE RNC configures AMR-WB rates by the parameters
AmrWbMode0UseTag, AmrWbMode1UseTag, AmrWbMode2UseTag,
AmrWbMode3UseTag, AmrWbMode4UseTag, AmrWbMode5UseTag,
AmrWbMode6UseTag, AmrWbMode7UseTag and AmrWbMode8UseTag. In Iuup
Version2, ZTE RNC supports all the AMR-NB and AMR-WB rates assigned by the CN.
The AMR-NB and AMR-WB dynamic rate adjustment based on single-link transmission
power is controlled by the configuration parameter AmrRncAdjust.
There are three types of AMR dynamic rate adjustment depending on the trigger
mechanisms:
AMR dynamic rate adjustment based on single-link transmission power
Due to inner-loop power control, uplink/downlink single -link transmission power
varies with the radio environment between the transmitting antennas of UE and
NodeB. When the radio environment degrades, the RNC should reduce the AMR to
decrease single-link transmission power to some degree. This serves to avoid
heavy uplink/downlink load of a cell resulting from increase in single-link
transmission power of AMR. When the single-link transmission power of AMR is low
and the system load is light, the RNC may increase the AMR to provide users with
better voice quality by making full use of system resources.
AMR rate adjustment triggered by the uplink/downlink overload of a cell
When a cell has uplink/downlink overload, the rate of uplink/downlink AMR service
should be reduced to decrease single-link transmission power, so as to lighten the
uplink/downlink load of the cell.
AMR rate adjustment triggered by the uplink/downlink resource congestion of a cell
Reduce the rate of uplink/downlink AMR service to lighten the uplink/downlink
resource congestion.
For these three trigger mechanisms, ZTE RNC can only adjust the rate of WB_AMR
services in the range of WB_AMR rates and can not adjust the rate of WB_AMR
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services to the rate of WB_AMR. ZTE RNC can also only adjust the rate of
NB_AMR services in the range of NB_AMR rates.
In terms of the currently implemented functions and AMR service running, ZTE considers
it unnecessary to control an uplink rate with the granularity as accurate as TTI. Therefore,
ZTE has not yet implemented SRB5-based uplink AMR-WB rate adjustment.
3.3.2 Dynamic AMR Adaptation Based on Single-Link Transmission Power
AMR-WB dynamic rate adjustment and AMR-NB dynamic rate adjustment both involve
uplink direction and downlink direction. They have the same principle and use the same
threshold. In view of this, they are unified as AMR dynamic rate adjustment and
described here.
3.3.2.1 Uplink Direction (Based on the UE Transmission power)
Uplink AMR dynamic rate adjustment is based on the transmission power reported by UE.
Its operating principles are as follows:
When the uplink transmission power reported by UE exceeds the threshold
AMR_6A (Refer to Section 3.3.2.3), the AMR should be reduced by one level if the
current uplink AMR is not the minimum rate. After degrading the uplink AMR level,
new Measurement Control will be sent to the UE.
When the uplink transmission power reported by UE is lower than the threshold
AMR_6B2 (Refer to Section 3.3.2.3), the AMR should be increased by one level if
the current uplink AMR is not the maximum rate and the uplink load of the system is
neither overloaded nor congested. After upgrading the uplink AMR level, new
Measurement Control will be sent to the UE.
In the TrFO connection mode, the following judgments must be added on the basis
of the steps above:
If the target value of the AMR uplink rate increase originated from the local end is
smaller than or equal to the maximum uplink rate of the Iu port, it is allowed to
originate the rate increase, which then will be admitted by the admission control
module. If the target value of the rate increase originated from the local end is
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greater than the maximum uplink rate of the Iu port, it is rejected to originate the
rate increase.
When the RNC receives the rate control command from the CN, the maximum rate
is the uplink target rate required by the CN. The admission control module
determines whether the target rate can be allowed by the current local end
according to the uplink load state of the current cell and the single-link UE
transmission power measurement report, and if the target rate is allowed, then RNC
returns this rate in the rate control response command to the peer end. At the same
time, the RNC sends to the UE the TFC control command, requiring adjustment of
the UE uplink rate to the target rate, otherwise RNC sends the Rate Control NACK
to the CN.
3.3.2.2 Downlink Direction (Based on DTCP)
The downlink AMR adjustment is based on the special downlink transmission power
measurement report from Node B on the basic principles as follows:
When the special downlink transmission power reported by NodeB exceeds the
threshold AMR_E1 (Refer to Section 3.3.2.3) for DtcpEaThd times consecutively,
the downlink AMR should be reduced by one level i f the current downlink AMR is
not the minimum rate.
When the special downlink transmission power reported by NodeB is lower than the
threshold AMR_F1 (Refer to Section 3.3.2.3) for DtcpEbThd times consecutively,
the downlink AMR should be increased by one level if the current downlink AMR is
not the maximum rate and the downlink load of the system is neither overloaded nor
congested.
In the TrFO connection mode, the downlink rate depends on the downlink rate of
the Iu port; In a Mobile to Mobile call, the downlink rate depends on the uplink rate
of the peer end. Therefore, the downlink AMR-WB rate adjustment algorithm has
the following changes in comparison with the non-TrFO connection mode:
When the local end needs to adjust the downlink AMR, the RNC sends the adjusted
target rate through the rate control command to the CN, which then sends this rate
through the rate control command to the peer-end RNC. The returned rate control
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response command contains the maximum uplink rate available with the peer end.
The peer end UE sends data at the smaller rate between the maximum uplink rate
supported by the peer end and the target rate required by the local end, so as to
complete downlink rate adjustment for the local end.
When the uplink rate of the peer end is decreased, the downlink rate of the local
end will be decreased accordingly.
When the uplink rate of the peer end is increased, the downlink rate of the local end
will be increased accordingly, resulting in change of the cell downlink load and the
single-link downlink D-TCP. The RNC should determine whether to decrease the
increasing downlink rate according to the cell downlink load and the single -link
downlink D-TCP measurement report. If the downlink rate should be decreased, the
RNC sends to the CN the rate control command that contains the maximum rate
supported by the local end, so as to control the downlink rate of the Iu port.
3.3.2.3 UE internal TxP Measurement
The UE internal measurement mainly measures the UE transmission power (TxP) by
event report,
Before obtaining UE internal measurement parameters, first find the “UE Internal
Measurement Configuration Index (UeIntMCfgNo)” from UE internal measurement
relationship (UeInt ) configuration items, based on the Cid and the measurement purpose
(EvtMeasTP1); then find a relevant set of parameters from UE internal measurement
relationship (UeInt ) configuration items, based on the UE Internal Measurement
Configuration Index (UeIntMCfgNo).
Note: Each UeIntMCfgNo corresponds to one measurement purpose, indicated with the
parameter UeIntMCfgNote.
There are two kinds of event, Event 6A and Event 6B:
Event 6A:when the UE TxP measurement value is greater than a certain absolute
threshold and this condition lasts for a moment
(TrigTime[MAX_UE_INTER_MEAS_EVENT] when UeIntMCfgNote =0), the Event 6A is
triggered;
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Event 6B: when the UE TxP measurement value is smaller than a certain absolute
threshold and this condition lasts for a moment
(TrigTime[MAX_UE_INTER_MEAS_EVENT] when UeIntMCfgNote =0), the Event 6B is
triggered.
The threshold parameter of Event 6A and Event 6B(TxPowerThres)is a delta value
relative to min(UE maximum transmitted power, MaxUlDpchPwr).
Here, MAX_UE_INTER_MEAS_EVENT is configured by MeasEvtNum .
The correspondence between other parameters that need to be filled in UE internal
measurement control message and OMCR configuration is described as follows:
Measurement report transmission mode (MeasRptTrMod(UeInt))
Filter coefficient (FilterCoeff(UeInt))
Measurement quantity (MeasQuantity(UeInt))
Report Criteria (RptCrt(UeInt))
UE Transmitted Power (RptTxPwrInd)
UE internal event identity (MeaEvtId(UeInt))
If AMR service exists, and AmrRncAdjust is “Open”, and the number of uplink AMR rates
is larger than 1, the measurement is triggered. Otherwise, the UE TxP measurement is
switched off.
3.3.2.4 Node B Dedicated TCP Measurement
The Node B dedicated TCP is related with the UE, it indicates the downlink transmission
power for the UE (the TCP on given carrier, given scramble, and given channelization
code) is measured by the Node B. The Node B dedicated TCP measurement for the
AMR rate control is reported periodically, the period is configured by RptPrd, Because of
the periodical report, whether the criteria for Event A/B is satisfied is determined by RNC.
Two sets of measurement parameters are configured:
Event A: when the NodeB D-TCP measurement value is greater than a specific
absolute threshold (EvtAbTcpThrd[3] when NbDMCfgNote is 7), Event A is
triggered. Event A is used to trigger the downlink rate decrease. When the criteria of
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Event A is satisfied, the downlink transmission power for a certain UE is considered
to be in a high power status.
Event B: when the NodeB D-TCP measurement value is smaller than a specific
absolute threshold (EvtAbTcpThrd[3] when NbDMCfgNote is 8), Event B is
triggered. The event B is used to check whether the downlink transmission power is
in a low status. When the criteria of Event A is satisfied, the downlink transmission
power for a certain UE is considered to be in a low power status.
Here, EvtAbTcpThrd[3] is the power offset to MaxDlDpchPwr.
If AMR service exists, and AmrRncAdjust is “Open”, and the number of downlink AMR
rates is larger than 1, the measurement is triggered. Otherwise, the Node B dedicated
TCP measurement is switched off.
3.3.3 Dynamic Adjustment Triggered by Resource Congestion
In case of uplink/downlink resource congestion, the RNC should decrease the rate of
some AMR services by priority. When the uplink/downlink resource congestion is cleared,
the RNC should increase step by step the rate of any decreased AMR service that meets
the rate increase conditions described above. This dynamic adjustment also applies to
WB-AMR. For details, please refer to ZTE UMTS Congestion Control Feature Guide.
3.3.4 Dynamic Adjustment Triggered by Load
In case of uplink/downlink overload on a cell, the RNC should decrease the rate of some
AMR services by priority. When the uplink/downlink is not overload , the RNC should
increase step by step the rate of any decreased AMR service that meets the rate
increase conditions described above. This dynamic adjustment also applies to WB-AMR.
For details, please refer to ZTE UTMS Overload Control Feature Guide.
3.3.5 Initial AMR Rate Selection Based on Cell Load
When the IuUP version is V1, RNC could reduce the intial AMR rate to control the uplink
or downlink cell load and the cell capacity could be increased.
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For the NB-AMR service: A NB-AMR rate set is built according to Section 3.3.6. If the
best cell downlink load is larger than AmrDlLdThrd or upnlink load is larger than
AmrUlLdThrd, the intial NB-AMR rate should be determined according to the following
principle. If the Guaranteed Bit Rate in the above set is larger than NAmrInitialRate, the
initial NB-AMR rate equals to the GBR. If the GBR in the above set is less than or equal
to NAmrInitialRate, the initial rate should be the largest rate among the rates that are less
than or equal to NAmrInitialRate and larger than or equal to the GBR. If the best cell
downlink load is smaller than or equal to AmrDlLdThrd or upnlink load is smaller than or
equal to AmrUlLdThrd, the initial NB-AMR rate is the maximum rate among the rates, in
the above set, which are smaller than or equal to the GBR in the RAB ASSIGNMENT
REQUEST.
For the WB-AMR service: A NB-AMR rate set is built according to Section 3.3.6. If the
best cell downlink load is larger than AmrDlLdThrd or upnlink load is larger than
AmrUlLdThrd, the intial WB -AMR rate should be determined according to the following
principle. If the Guaranteed Bit Rate in the above set is larger than WAmrInitialRate, the
initial WB-AMR rate equals to the GBR. If the GBR in the above set is less than or equal
to WAmrInitialRate, the initial rate should be the largest rate among the rates that are
less than or equal to WAmrInitialRate and larger than or equal to the GBR. If the best cell
downlink load is smaller than or equal to AmrDlLdThrd or upnlink load is smaller than or
equal to AmrUlLdThrd, the initial WB-AMR rate is the maximum rate among the rates, in
the above set, which are smaller than or equal to the GBR in the RAB ASSIGNMENT
REQUEST.
The initial AMR rate determined according to the principles above is also the maximum
AMR rate after the call is set up.
When the IuUP version is V2, the initial NB-AMR or WB-AMR rate is the MBR in the RAB
ASSIGNMENT REQUEST.
3.3.6 GBR Reservation for the AMR service
When the IuUP version is V1, the NB-AMR or WB-AMR rates that are configured by the
OMC may be different from the AMR rates in the RAB ASSIGNMENT REQUEST, so the
actual NB-AMR or WB-AMR rates that are implemented should be the intersection of the
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above two sets of AMR rates, and the GBR in RAB ASSIGNMENT REQUEST, i.e. the
GBR in RAB ASSIGNMENT REQUEST is included mandatorily.
But sometimes the RNC of other venders do not support the GBR in RAB ASSIGNMENT
REQUEST, so the parameter AMRGbrResInd is used to determine whether the GBR in
RAB ASSIGNMENT REQUEST is included mandatorily.
If AMRGbrResInd is set to “1: True”, the actual NB-AMR or WB-AMR rates that are
implemented should be the intersection of the above two sets of AMR rates, and the
GBR in RAB ASSIGNMENT REQUEST. And GBR is the GBR in RAB ASSIGNMENT
REQUEST.
If AMRGbrResInd is set to “0: False”, the actual NB-AMR or WB-AMR rates that are
implemented should be the intersection of the above two sets of AMR rates. And GBR is
the minimum rate among the rates, in the intersection set, which are larger than or equal
to the GBR in RAB ASSIGNMENT REQUES T.
3.4 TrFO Support
At the R99 stage, voice at the CN CS employs 64kbit/s PCM encoding based on TDM
bearer. Therefore, the R99 MSC must have the voice TC function. But voice
encoding/decoding is apt to reduce voice quality. The calls between mobile users, in
particular, need dual voice encoding/decoding. If a codec is not used, voice quality will
be improved with network bandwidth saved.
At the R4 stage, voice encoding/decoding times can be reduced by establishing a TrFO
connection. The TrFO connection can be established throughout end-to-end process or
between some node of a call connection. For example, for a call between UMTS UE and
a fixed telephone, the TrFO connection only exists between UMTS UE and a core
network. The core network and RNC in the TrFO connection must support the IuUP V2.
Otherwise, no TrFO connection can be established. ZTE supports the IuUP V1 and IuUP
V2. The RNC will make a choice according to CN RAB assignment parameters.
The TrFO is implemented by employing the outband signaling encoding/decoding control
function (OoBTC). It is applicable to the calls between mobile networks and those
between a mobile network and an external network. When the same voice
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encoding/decoding type is used between both call parties or between one call party and
a node in the call connection, the TrFO can transparently transmit compressed voice,
which improves voice quality and saves transmission bandwidth.
The node on both sides with a TrFO connection successfully established will use
completely the same common compressed voice encoding type negotiated at the
OoBTC stage. A codec must be inserted between a TrFO connection and a non-TrFO
connection to convert one encoding type into another. The implementat ion strategy of
the core network will, to the greatest extent, ensure that the insertion position can meet
the following requirements:
The insertion position should reduce the use of a transcoder and improve voice
quality;
The insertion position should save transmission bandwidth, that is, it should prolong
the connection which uses compressed voice encoding data for transmission.
ZTE RNC controls the IuUP version between CN and RNC in the RAB assignment
procedure by the parameter IntraRatUpVer if CN support both IuUP Version1 and
Version2. And ZTE RNC controls the IuUP version between CN and RNC in 2G to 3G
relocation procedure by the parameter InterRatUpVer if CN support both IuUP Version1
and Version2.
For a UTRAN, its IuUP initialization, reverse initialization, IuUP rate control, and IuUP
reverse rate control are related to the TrFO process.
3.4.1 OoBTC Outband Codec Control
When a call is initiated, both call parties will negotiate about the codec so as to attempt to
establish a TrFO operation. In an IAM, the O-MSC carries the supported codec type list
and sends it to a transmission network. From the list, the transmission network deletes
the types that are not supported and sends it to a T-MSC. From the list, the T-MSC also
deletes the encoding types that are not supported. Then, the T-MSC selects an optimal
common encoding/decoding type, returns it to the transmission network and the O-MSC,
and notifies them of the currently selected encoding/decoding type. Meantime, the
T-MSC feeds back the encoding/decoding type that the Terminating UE supports to the
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O-MSC, and begins to establish bearer on the basis of this codec. This flow is shown in
the following figure.
Figure 3-2 Flow of OoBTC Outband Codec Control
Codec List (v, w, x, y, z)
Codec List (v, w, x, z)
O-MSC Transit T-MSC
O-MGW T-MGWTransit
MGW
Selected Codec = v, Available List (v, x, z, )
Selected Codec = v
Selected Codec = v
Selected Codec = v, Available
List (v, x, z, )
Selected Codec = v
Bearer Established Bearer Established
The encoding type that the UE supports is transparently transmitted to the RNC by
means of Uplink Direct Transfer-> NAS Message-> Bearer Capacity. Then, the RNC
transparently transmits the encoding type to the MSC Server by means of Direct Transfer
-> NAS Indicator ->Bearer Capacity. During RAB assignment, the encoding/decoding
type lists of the calling and called parties are completely the same.
3.4.2 IuUP Initialization
IuUP initialization serves to define the mapping relationship (used at the data
transmission stage) between the RNC and CN on both sides of IuUP, including RAB
sub-flow combination, RFCIs, and SDU size of related RAB sub-flow.
If a bearer is successfully established, the CN will deliver an RAB assignment request
message to the RNC. The RNC in R4 version must support all the SDU sub-flow
combinations in the RAB assignment request message. That is, the content in the
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initialization frame is a universal set of sub-flow combinations determined by RAB
assignment. Thus, the initialization frame will only be used to negotiate about IuUP
version information and RFCI correspondence (each RFCI corresponds to a sub-flow
combination). In the R99 version, this initialization process can only be initiated when the
RNC receives RAB assignment/modification or RNC relocation. In the R4 version, the
CN can also start this initialization process, called IuUP reverse initialization. IuUP
initialization is shown in the following figure.
Figure 3-3 IuUP Initialization
*
Transfer Of User Data
CN/ RNC
INITIALISATION
((RFCI, SDU sizes[, IPTIs 2) ]) m )
INITIALISATION ACK
* can be repeated N INIT times 2) optional
RNC/ CN
In the RFCI set determined during IuUP initialization, the rate which corresponds to the
first RAB sub-flow combination is the maximum rate in the initialization answer direction
permitted by the local end when data transmission begins. The maximum rate must be
greater than the guaranteed rate and SID rate. It can be modified during IuUP rate
control after IuUP initialization. The rate greater than the guaranteed rate is called a
controllable rate. The rate lower than the guaranteed rate cannot be modified.
3.4.3 IuUP Rate Control
IuUP rate control serves to notify the peer IuUP protocol layer of the maximum rate at the
Iu port in the reverse direction of the rate control frame. In the R4 version, IuUP rate
control can be initiated by the RNC or the CN. In the R99 version, IuUP rate control can
only be initiated by the RNC.
As long as an IuUP entity is not suspended by other control flows, it can initiate rate
control. The controlled rates are all included in the RFC set determined during IuUP
initialization. These rates that correspond to the RFC should be higher than the
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guaranteed rate. "Rate control" cannot be implemented in terms of the SID rate and the
RFC lower than the guaranteed rate because they themselves cannot be prohibited.
Figure 3-4 Flow of IuUP Rate Control
CN/ RNC
RNC/ CN
RATE CONTROL
(RFCI indicators)
RATE CONTROL ACK
(RFCI indicators)
Note: The rate control frame describes the use limit of an "RFC set", which is called
"RFC limit set" in the following parts.
In downlink direction, the RNC triggers the rate control frame, records the "RFC limit set"
(downlink direction), and monitors the implementation behavior of the CN. If the CN still
sends the data frame of the limited RFCI, the rate control frame must be resent. In uplink
direction, the IuUP module of the RNC receives the rate control frame and implements
the limit by means of TFC control.
The rate control initiated by the CN is as follows: After receiving a rate control message
from the RNC, the CN initiates rate control to the other party of a call to limit or open the
other party's uplink AMR level. Or the CN initiates a rate adjustment flow on its own
according to TrFO. For example, in SRNS relocation, the CN first performs reverse
initialization after a new RNC sends relocation detection to the CN. Then, the new RNC
initiates a process called immediate initialization. This serves to negotiate about the
maximum rate for data transmission between two IuUP entities which support TrFO.
The rate control initiated by the RNC is as follows: During dynamic AMR process, the
RNC adjusts the downlink AMR level according the downlink load of a cell or the
dedicated TCP measurement of an RL, and initiates rate control.
Compared with the encoding/decoding type negotiation before initialization, the IuUP
rate control is in-band rate control.
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4 Parameters and Configuration
4.1 Parameter List of AMR Dynamic Rate Adjustment
Table 4-1 Parameter List
Id Abbreviated Parameter name
1 AmrRncAdjust AMR Rate Adjustment Switch for RNC
2 MaxUlDpchPwr
Maximum Allowed Uplink DPCH Transmission
Power
3 MaxDlDpchPwr DPCH Maximum DL Power
4 AmrNbMode0UseTag AMR_NB 4.75k Use Tag
5 AmrNbMode1UseTag AMR_NB 5.15k Use Tag
6 AmrNbMode2UseTag AMR_NB 5.90k Use Tag
7 AmrNbMode3UseTag AMR_NB 6.70k Use Tag
8 AmrNbMode4UseTag AMR_NB 7.40k Use Tag
9 AmrNbMode5UseTag AMR_NB 7.95k Use Tag
10 AmrNbMode6UseTag AMR_NB 10.2k Use Tag
11 AmrNbMode7UseTag AMR_NB 12.2k Use Tag
12 AmrWbMode0UseTag AMR_WB 6.60k Use Tag
13 AmrWbMode1UseTag AMR_WB 8.85k Use Tag
14 AmrWbMode2UseTag AMR_WB 12.65k Use Tag
15 AmrWbMode3UseTag AMR_WB 14.25k Use Tag
16 AmrWbMode4UseTag AMR_WB 15.85k Use Tag
17 AmrWbMode5UseTag AMR_WB 18.25k Use Tag
18 AmrWbMode6UseTag AMR_WB 19.85k Use Tag
19 AmrWbMode7UseTag AMR_WB 23.05k Use Tag
20 AmrWbMode8UseTag AMR_WB 23.85k Use Tag
21 WAMRSUPIND WB-AMR Speech Support Indicator
22 INTERRATUPVER Inter-RAT IuUP Version
23 INTRARATUPVER Intra-RAT IuUP Version
24 DtcpEaThd Event A Counter Threshold for PS on DL DCH or
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Id Abbreviated Parameter name
DL AMR Decreasing Rate on D-TCP
25 DtcpEbThd Event B Counter Threshold for Restriction PS
Increasing Rate on DL DCH or Triggering DL
AMR Increasing Rate Based on D-TCP
26 AmrDlLdThrd Cell Downlink Load Threshold for AMR Data
Rate Decision
27 AmrUlLdThrd Cell Uplink Load Threshold for AMR Data Rate
Decision
28 NAmrInitialRate Narrow-Band AMR Initial Data Rate for High Cell
Load
29 WAmrInitialRate Wide-Band AMR Initial Data Rate for High Cell
Load
30 TxPowerThres UE Transmitted Power Threshold
31 EvtAbTcpThrd Measurement Threshold of Event A/B for
Transmitted Code Power Ratio
32 UeIntMCfgNote Function of Configuration Parameters
33 NbDMCfgNote Function of Configuration Parameters
34 TrigTime[MAX_UE_INTE
R_MEAS_EVENT] Time to Trigger
35 MeasEvtNum Maximum Event Number of UE Internal
Measurement
36 MeasRptTrMod Measurement Report Transfer Mode
37 FilterCoeff Filter coefficient
38 MeasQuantity UE Internal Measurement Quantity
39 RptCrt Report Criteria
40 RptTxPwrInd UE Transmitted Power Report Indicator
41 MeaEvt Id[MAX_UE_INTE
R_MEAS_EVENT]
UE Internal Measurement Event Identity
42 EvtMeasTP1 UE Transmitted Power Event Report
Configuration Index for AMR
43 AMRGbrResInd GBR of AMR Service Whether to be Reserved
Indicator
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4.2 Configuration of AMR Dynamic Rate Adjustment
Parameters
4.2.1.1 AMR Rate Adjustment Switch for RNC
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Logical RNC Associated With PLMN Configuration Information->AMR Rate
Adjustment Switch for RNC
Parameter Configuration
When the value of this parameter is "Closed", AMR dynamic rate adjustment will not
be triggered due to UE internal measurement and NodeB special measurement;
when the value of this parameter is "Open", AMR dynamic rate adjustment will be
triggered due to the above-mentioned measurement. When this parameter is
closed, AMR voice quality remains unchanged in any case; when this parameter is
open, AMR voice quality may slightly degrade according to different scenarios, but
system capacity can be increased accordingly.
4.2.1.2 Maximum Allowed Uplink DPCH Transmission Power
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->Power Control Related to Service
and Diversity Mode->Maximum Allowed Uplink DPCH Transmission Power
Parameter Configuration
Background configuration value. The greater this value is, the higher the maximum
permissible uplink transmission power is. It is related to service sub-class..
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4.2.1.3 DPCH Maximum DL Power
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->Power Control Related to Service
and Diversity Mode->DPCH Maximum DL Power
Parameter Configuration
It represents the maximum permissible downlink DPCH transmission power. The
greater this value is, the higher the maximum permissible downlink transmission
power is .It is related to service sub-class.
4.2.1.4 AMR_NB 4.75k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 4.75k Use Tag
Parameter Configuration
AMR_NB 4.75k using label 0: not using
1: using
4.2.1.5 AMR_NB 5.15k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 5.15k Use Tag
Parameter Configuration
AMR_NB 5.15k using label 0: not using
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1: using
4.2.1.6 AMR_NB 5.90k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 5.90k Use Tag
Parameter Configuration
AMR_NB 5.90k using label 0: not using
1: using
4.2.1.7 AMR_NB 6.70k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 6.70k Use Tag
Parameter Configuration
AMR_NB 6.70k using label 0: not using
1: using
4.2.1.8 AMR_NB 7.40k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 7.40k Use Tag
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Parameter Configuration
AMR_NB 7.40k using label 0: not using
1: using
4.2.1.9 AMR_NB 7.95k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 7.95k Use Tag
Parameter Configuration
AMR_NB 7.95k using label 0: not using
1: using
4.2.1.10 AMR_NB 10.2k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 10.2k Use Tag
Parameter Configuration
AMR_NB 10.2k using label 0: not using
1: using
4.2.1.11 AMR_NB 12.2k Use Tag
OMC Path
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Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_NB 12.2k Use Tag
Parameter Configuration
AMR_NB 12.2k using label 0: not using
1: using
4.2.1.12 AMR_WB 6.60k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 6.60k Use Tag
Parameter Configuration
AMR_WB 6.60k using label 0: not using
1: using
4.2.1.13 AMR_WB 8.85k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 8.85k Use Tag
Parameter Configuration
AMR_WB 8.85k using label 0: not using
1: using
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4.2.1.14 AMR_WB 12.65k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 12.65k Use Tag
Parameter Configuration
AMR_WB 12.65k using label 0: not using
1: using
4.2.1.15 AMR_WB 14.25k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 14.25k Use Tag
Parameter Configuration
AMR_WB 14.25k using label 0:not using
1: using
4.2.1.16 AMR_WB 15.85k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 15.85k Use Tag
Parameter Configuration
AMR_WB 15.85k using label 0: not using
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1: using
4.2.1.17 AMR_WB 18.25k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 18.25k Use Tag
Parameter Configuration
AMR_WB 18.25k using label 0: not using
1: using
4.2.1.18 AMR_WB 19.85k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 19.85k Use Tag
Parameter Configuration
AMR_WB 19.85k using label 0: not using
1: using
4.2.1.19 AMR_WB 23.05k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 23.05k Use Tag
AMR-NB&AMR-NB Feature Guide
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Parameter Configuration
AMR_WB 23.05k using label 0: not using
1: using
4.2.1.20 AMR_WB 23.85k Use Tag
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->AMR_WB 23.85k Use Tag
Parameter Configuration
AMR_WB 23.85k using label 0: not using
1: using
4.2.1.21 WB-AMR Speech Support Indicator
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->RNC Configuration Supplement Information->WB-AMR Speech Support
Indicator
Parameter Configuration
This parameter indicates whether the RNC support WB-AMR voice services.
4.2.1.22 Inter-RAT IuUP Version
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->RNC Radio Resource
Management->Inter-RAT IuUP Version Selection
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Parameter Configuration
Specifies the intra-RAT IuUP Version. When CN supports both IuUP Version1 and
Version2, ZTE RNC controls the IuUP version between CN and RNC according to
this parameter in the 2G to 3G relocation procedure.
4.2.1.23 Intra-RAT IuUP Version
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->RNC Radio Resource
Management->Intra-RAT IuUP Version Selection
Parameter Configuration
Specifies the intra-RAT IuUP Version. When CN supports both IuUP Version1 and
Version2, ZTE RNC controls the IuUP version between CN and RNC according to this
parameter in the RAB assignment and Intra-RAT relocation procedure.
4.2.1.24 Event A Counter Threshold for PS on DL DCH or DL AMR Decreasing Rate
on D-TCP
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration
Information->Logical RNC XXX->Modify Advanced Parameter->Dynamic Radio
Bearer Controll Information->Event A Counter Threshold for PS on DL DCH or DL
AMR Decreasing Rate on D-TCP
Parameter Configuration
This parameter indicates the event A counter threshold of consecutive DTCP
reports. If the times of dedicated transmitted code power being larger than the event
A threshold exceed the threshold indicated by this parameter, it will trigger downlink
PS or AMR decreasing rate .
AMR-NB&AMR-NB Feature Guide
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4.2.1.25 Event B Counter Threshold for Restriction PS Increasing Rate on DL DCH
or Triggering DL AMR Increasing Rate Based on D-TCP
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration
Information->Logical RNC XXX->Modify Advanced Parameter->Dynamic Radio
Bearer Controll Information->Event B Counter Threshold for Restriction PS
Increasing Rate on DL DCH or Triggering DL AMR Increasing Rate Based on
D-TCP
Parameter Configuration
This parameter indicates the event B counter threshold of consecutive DTCP
reports. If the times of dedicated transmitted code power being less than the event B
threshold exceed the threshold indicated by this parameter, it will trigger downlink
AMR increasing rate or allow PS services to increase rate on DL DCH based on
traffic volume report .
4.2.1.26 Cell Downlink Load Threshold for AMR Data Rate Decision
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->UltranCell->UltranCellXXX->Modify Advanced
Parameter->utranCell->Cell Downlink Load Threshold for AMR Data Rate Decision
Parameter Configuration
This parameter is relative to the cell maximal Transmit Carrier Power and is used to
decide the Initial AMR data rate. When the cell effective downlink load is larger than
this threshold, the new Narrow-Band AMR will be setup with the data rate of
NAmrInitialRate or GBR, the new Wide-Band AMR will be setup with the data rate of
WAmrInitialRate or GBR. Else, the new Narrow-Band AMR will be setup with the
maximal data rate of Narrow-Band AMR, the new Wide-Band AMR will be setup with
the maximal data rate of Wide-Band AMR.
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 39
4.2.1.27 Cell Uplink Load Threshold for AMR Data Rate Decision
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->UltranCell->UltranCellXXX->Modify Advanced
Parameter->utranCell->Cell Uplink Load Threshold for AMR Data Rate Decision
Parameter Configuration
This parameter is relative to the cell uplink base noise and is used to decide the
Initial AMR data rate. When the cell effective uplink load is larger than this threshold,
the new Narrow-Band AMR will be setup with the data rate of NAmrInitialRate or
GBR, the new Wide-Band AMR will be setup with the data rate of WAmrInitialRate
or GBR. Else, the new Narrow-Band AMR will be setup with the maximal data rate of
Narrow-Band AMR, the new Wide-Band AMR will be setup with the maximal data
rate of Wide-Band AMR.
4.2.1.28 Narrow-Band AMR Initial Data Rate for High Cell Load
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->Narrow-Band AMR Initial Data Rate for High Cell Load
Parameter Configuration
This parameter indicates the Initial AMR data rate when cell load is high. When the
cell effective downlink load is larger than AmrDlLdThrd or the cell effective uplink
load is larger than AmrUlLdThrd, the new Narrow-Band AMR will be setup with the
data rate of NAmrInitialRate or GBR; else, the new Narrow-Band AMR will be setup
with the maximal data rate of Narrow-Band AMR.
4.2.1.29 Wide-Band AMR Initial Data Rate for High Cell Load
OMC Path
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 40
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Logical RNC Associated With PLMN Configuration Information
XXX->Modify Advanced Parameter->RNC Configuration Related to
PLMN->Wide-Band AMR Initial Data Rate for High Cell Load
Parameter Configuration
This parameter indicates the Initial AMR data rate when cell load is high. When the cell
effective downlink load is larger than AmrDlLdThrd or the cell effective uplink load is
larger than AmrUlLdThrd, the new Wide-Band AMR will be setup with the data rate of
WAmrInitialRate or GBR; else, the new Wide-Band AMR will be setup with the maximal
data rate of Wide-Band AMR.
4.2.1.30 UE Transmitted Power Threshold
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->UE Transmitted Power Threshold
Parameter Configuration
This parameter indicates the UE transmitted power threshold in event 6a/6b.
4.2.1.31 Measurement Threshold of Event A/B for Transmitted Code Power Ratio
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->NodeB Dedicated Measurement
Configuration->Measurement Threshold of Event A/B for Transmitted Code Power
Parameter Configuration
This parameter indicates the power offset of the DPCH maximum DL power, which
defines which threshold that shall trigger event A, B for transmitted carrier power
measurement.
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 41
4.2.1.32 Function of Configuration Parameters
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->Function of Configuration Parameters
Parameter Configuration
This parameter indicates the function of configuration parameters corresponding to
the UE internal measurement configuration index.
4.2.1.33 Function of Configuration Parameters
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->NodeB Dedicated Measurement
Configuration->Function of Configuration Parameters
Parameter Configuration
This parameter indicates the function, purpose etc. of the dedicated measurement
parameters indicated by the configuration index.
4.2.1.34 Time to Trigger
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->Time to Trigger
Parameter Configuration
This parameter indicates the period of time during which the event condition has to be
satisfied before sending a measurement report.
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 42
4.2.1.35 Maximum Event Number of UE Internal Measurement
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->Maximum Event Number of UE Internal Measurement
Parameter Configuration
This parameter indicates the maximum event number of UE internal measurement
4.2.1.36 Measurement Report Transfer Mode
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->Measurement Report Transfer Mode
Parameter Configuration
This parameter indicates the RLC mode of the UE internal measurement report .
4.2.1.37 Filter coefficient
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->Filter Coefficient
Parameter Configuration
This parameter indicates the filtering factor that UE performs the L3 filtering on the
measurement results of the internal measurement.
4.2.1.38 UE Internal Measurement Quantity
OMC Path
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 43
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->UE Internal Measurement Quantity
Parameter Configuration
This parameter indicates the measurement quantity of the UE internal measurement.
4.2.1.39 Report Criteria
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->Report Criteria
Parameter Configuration
This parameter indicates the report criteria for UE internal measurement report.
4.2.1.40 UE Transmitted Power Report Indicator
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->UE Transmitted Power Report Indicator
Parameter Configuration
This parameter indicates whether the UE transmitted power report is requested or not.
4.2.1.41 UE Internal Measurement Event Identity
OMC Path
Path: View->Configuration Management->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->UE Internal Measurement Event Identity
Parameter Configuration
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 44
This parameter indicates the UE internal measurement event identity.
4.2.1.42 UE Transmitted Power Event Report Configuration Index for AMR
OMC Path
Path: View->Configuration Management ->RNC NE->RNC Radio Resource
Management->Modify Advanced Parameter->UE Internal Measurement
Configuration->UE Internal Measurement Configuration Index 0
Parameter Configuration
This parameter indicates the UE transmitted power event report configuration index
for AMR adjustment, which is used for indexing the configuration of the parameters
of UE transmitted power event report for AMR.
4.2.1.43 GBR of AMR Service Whether to be Reserved Indicator
OMC Path
View -> Configuration Management -> RNC NE -> RNC Radio Resource
Management -> Advanced Parameter Manager -> RNC Radio Resource
Management -> GBR of AMR Service Whether to be Reserved Indicator
Parameter Configuration
This parameter indicates whether the CN assignment GBR of AMR service is
forcibly reserved in Iu UP V1, when the CN assignment GBR is not matching with
the AMR rate configured by RNC.
5 Counter and Alarm
5.1 Counter List
Counter No. Description
C310030466 Number of CS AMR 12.2k in the best cell
C310030467 Number of CS AMR 10.2k in the best cell
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Counter No. Description
C310030468 Number of CS AMR 7.95k in the best cell
C310030469 Number of CS AMR 7.4k in the best cell
C310030470 Number of CS AMR 6.7k in the best cell
C310030471 Number of CS AMR 5.9k in the best cell
C310030472 Number of CS AMR 5.15k in the best cell
C310030473 Number of CS AMR 4.75k in the best cell
C310030474 Number of CS WB AMR 23.85k in the best cell
C310030475 Number of CS WB AMR 23.05k in the best cell
C310030476 Number of CS WB AMR 19.85k in the best cell
C310030477 Number of CS WB AMR 18.25k in the best cell
C310030478 Number of CS WB AMR 15.85k in the best cell
C310030479 Number of CS WB AMR 14.25k in the best cell
C310030480 Number of CS WB AMR 12.65k in the best cell
C310030481 Number of CS WB AMR 8.85k in the best cell
C310030482 Number of CS WB AMR 6.60k in the best cell
C310030638 Number of CS AMR 12.2k in the non-best cell
C310030639 Number of CS AMR 10.2k in the non-best cell
C310030640 Number of CS AMR 7.95k in the non-best cell
C310030641 Number of CS AMR 7.4k in the non-best cell
C310030642 Number of CS AMR 6.7k in the non-best cell
C310030643 Number of CS AMR 5.9k in the non-best cell
C310030644 Number of CS AMR 5.15k in the non-best cell
C310030645 Number of CS AMR 4.75k in the non-best cell
C310030646 Number of CS WB AMR 23.85k in the non-best cell
C310030647 Number of CS WB AMR 23.05k in the non-best cell
C310030648 Number of CS WB AMR 19.85k in the non-best cell
C310030649 Number of CS WB AMR 18.25k in the non-best cell
C310030650 Number of CS WB AMR 15.85k in the non-best cell
C310030651 Number of CS WB AMR 14.25k in the non-best cell
C310030652 Number of CS WB AMR 12.65k in the non-best cell
C310030653 Number of CS WB AMR 8.85k in the non-best cell
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Counter No. Description
C310030654 Number of CS WB AMR 6.60k in the non-best cell
C310063411 Number of CS AMR 12.2k in the DRNC cell
C310063412 Number of CS AMR 10.2k in the DRNC cell
C310063413 Number of CS AMR 7.95k in the DRNC cell
C310063414 Number of CS AMR 7.4k in the DRNC cell
C310063415 Number of CS AMR 6.7k in the DRNC cell
C310063416 Number of CS AMR 5.9k in the DRNC cell
C310063417 Number of CS AMR 5.15k in the DRNC cell
C310063418 Number of CS AMR 4.75k in the DRNC cell
C310063419 Number of CS WB AMR 23.85k in the DRNC cell
C310063420 Number of CS WB AMR 23.05k in the DRNC cell
C310063421 Number of CS WB AMR 19.85k in the DRNC cell
C310063422 Number of CS WB AMR 18.25k in the DRNC cell
C310063423 Number of CS WB AMR 15.85k in the DRNC cell
C310063424 Number of CS WB AMR 14.25k in the DRNC cell
C310063425 Number of CS WB AMR 12.65k in the DRNC cell
C310063426 Number of CS WB AMR 8.85k in the DRNC cell
C310063427 Number of CS WB AMR 6.60k in the DRNC cell
C310040001 Holding time for the best cell,AMR12.2
C310040002 Holding time for the best cell,AMR10.2
C310040003 Holding time for the best cell,AMR7.95
C310040004 Holding time for the best cell,AMR7.4
C310040005 Holding time for the best cell,AMR6.7
C310040006 Holding time for the best cell,AMR5.9
C310040007 Holding time for the best cell,AMR5.15
C310040008 Holding time for the best cell,AMR4.75
C310040009 Holding time for the best cell,WB-AMR23.85
C310040010 Holding time for the best cell,WB-AMR23.05
C310040011 Holding time for the best cell,WB-AMR19.85
C310040012 Holding time for the best cell,WB-AMR18.25
C310040013 Holding time for the best cell,WB-AMR15.85
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ZTE Confidential Proprietary 47
Counter No. Description
C310040014 Holding time for the best cell,WB-AMR14.25
C310040015 Holding time for the best cell,WB-AMR12.65
C310040016 Holding time for the best cell,WB-AMR8.85
C310040017 Holding time for the best cell,WB-AMR6.60
C310040075 Holding time for the non-best cell,AMR12.2
C310040076 Holding time for the non-best cell,AMR10.2
C310040077 Holding time for the non-best cell,AMR7.95
C310040078 Holding time for the non-best cell,AMR7.4
C310040079 Holding time for the non-best cell,AMR6.7
C310040080 Holding time for the non-best cell,AMR5.9
C310040081 Holding time for the non-best cell,AMR5.15
C310040082 Holding time for the non-best cell,AMR4.75
C310040083 Holding time for the non-best cell,WB-AMR23.85
C310040084 Holding time for the non-best cell,WB-AMR23.05
C310040085 Holding time for the non-best cell,WB-AMR19.85
C310040086 Holding time for the non-best cell,WB-AMR18.25
C310040087 Holding time for the non-best cell,WB-AMR15.85
C310040088 Holding time for the non-best cell,WB-AMR14.25
C310040089 Holding time for the non-best cell,WB-AMR12.65
C310040090 Holding time for the non-best cell,WB-AMR8.85
C310040091 Holding time for the non-best cell,WB-AMR6.60
C310073296 Holding time for the DRNC cell,AMR12.2
C310073297 Holding time for the DRNC cell,AMR10.2
C310073298 Holding time for the DRNC cell,AMR7.95
C310073299 Holding time for the DRNC cell,AMR7.4
C310073300 Holding time for the DRNC cell,AMR6.7
C310073301 Holding time for the DRNC cell,AMR5.9
C310073302 Holding time for the DRNC cell,AMR5.15
C310073303 Holding time for the DRNC cell,AMR4.75
C310073304 Holding time for the DRNC cell,WB-AMR23.85
C310073305 Holding time for the DRNC cell,WB-AMR23.05
AMR-NB&AMR-NB Feature Guide
ZTE Confidential Proprietary 48
Counter No. Description
C310073306 Holding time for the DRNC cell,WB-AMR19.85
C310073307 Holding time for the DRNC cell,WB-AMR18.25
C310073308 Holding time for the DRNC cell,WB-AMR15.85
C310073309 Holding time for the DRNC cell,WB-AMR14.25
C310073310 Holding time for the DRNC cell,WB-AMR12.65
C310073311 Holding time for the DRNC cell,WB-AMR8.85
C310073312 Holding time for the DRNC cell,WB-AMR6.60
C310073296 Holding time for the DRNC cell,AMR12.2
C310073297 Holding time for the DRNC cell,AMR10.2
C310073298 Holding time for the DRNC cell,AMR7.95
C310073299 Holding time for the DRNC cell,AMR7.4
C310073300 Holding time for the DRNC cell,AMR6.7
C310073301 Holding time for the DRNC cell,AMR5.9
C310073302 Holding time for the DRNC cell,AMR5.15
C310073303 Holding time for the DRNC cell,AMR4.75
C310073304 Holding time for the DRNC cell,WB-AMR23.85
C310073305 Holding time for the DRNC cell,WB-AMR23.05
C310073306 Holding time for the DRNC cell,WB-AMR19.85
C310073307 Holding time for the DRNC cell,WB-AMR18.25
C310073308 Holding time for the DRNC cell,WB-AMR15.85
C310073309 Holding time for the DRNC cell,WB-AMR14.25
C310073310 Holding time for the DRNC cell,WB-AMR12.65
C310073311 Holding time for the DRNC cell,WB-AMR8.85
C310073312 Holding time for the DRNC cell,WB-AMR6.60
5.2 Alarm List
No related alarm list.
AMR-NB&AMR-NB Feature Guide
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6 Glossary
A
AMR Adaptive Multi-Rate
AMRC Adaptive Multi-Rate Control
AMR-NB Adaptive Multi-Rate Narrow-Band
AMR-WB Adaptive Multi-Rate Wide-Band
C
CN Core Network
D
D-TCP Dedicated Transmitting Carrier Power
I
IAM Initial Address Message
IuUP Iu User Plane
M
MSC Mobile Switch Center
N
NAS Non-Access-Stratum
O
OoBTC Out-of-Band Transcoder Control
P
PCM Pulse Code Modulation
AMR-NB&AMR-NB Feature Guide
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PSTN Public Switched Telephone Network
Q
QoS Quality of Service
O-MSC Originating Mobile Switch Center
R
RAB Radio Access Bearer
RFC RAB sub-Flow Combination
RFCI RAB sub-Flow Combination Indicator
RL Radio Link
RX Receive
RNC Radio Network Controller
S
SCR Source Controlled Rate
SDU Service Data Unit
SID Silence Information Description
SRNC Serving RNC
T
TC Transcoder
TCP Transmitting Carrier Power
TFC Transport Format Combination
TFO Tandem Free Operation