3G AMR Codec Selection Planning and Optimisation Guideline RU10 v.1.0

1/22 Document Type Document TitleAuthor Date, Version Unit/Dept. For internal use only Nokia Siemens Networks 3G AMR Codec Selection Planning and Optimisation Guide in RU10 RAN NPO/NSO Capability Management Date: 7.4.2009 3G AMR Codec Selection Planning and Version 0.1 Optimisation Guide in RU10 RAN Revision History Date Rev. Summary of Change 7.4.2009 v.0.1 Document created Jarkko Itkonen, Dalius Editor/s: Kaskelevicius Date: 7.4.2009 Version: v.0.1 Copyright © Nokia Siemens Networks. This material, including documentation and any related computer programs, is protected by copyright controlled by Nokia Siemens Networks. All rights are reserved. Copying, including reproducing, storing, adapting or translating, any or all of this material requires the prior written consent of Nokia Siemens Networks. This material also contains confidential information which may not be disclosed to others without the prior written consent of Nokia Siemens Networks Copyright © Nokia Siemens Networks 2008 Company confidential Page 2 (22) .......4.....................................4 Load Based AMR Codec Mode Selection...11 4............................. 5...............................................3 Capacity..6)....................................................................................................... 6.... 7......................................................................................10 4.........................................................65..............2........3 Support for Tandem/Transcoder Free Operation..........................2 Wideband AMR Codec Set (12..2009 3G AMR Codec Selection Planning and Version 0.......75)..............6)...............1 Optimisation Guide in RU10 RAN Table of contents 1 Introduction........................................... 8...................................1 AMR Codec Sets (12.......95...15 6........ 12 5 Effect of AMR codec mode on voice quality.....................8 3...9 4 Effect of AMR codec mode on link and network performance...............................................................................95...................................................5 Core network...................65...........................75)............................4 KPI performance................... NPO/NSO Capability Management Date: 7.......................................85............................................22 Copyright © Nokia Siemens Networks 2008 Company confidential Page 3 (22) ...... 4...........................................90.......................................75) and (5............... 19 7 Performance monitoring and optimisation..............1 EbNo of AMR codec modes..........4 Support for Tandem/Transcoder Free Operation..........90...........................2 Link budget and coverage..........1 Summary of features...... 11 4....10 4............................2 AMR Codec Sets (12...................20 References...................................................................5 Load Based AMR Codec Mode Selection.............8 3...............15 6....................................6 Core network feature dependency...................................... 4..........................................8 3.............15 6............................16 6.........6 3 Product and feature description. 4.................................... 6..90.................90................................................................................................................3 Wideband AMR Codec Set (12........... 7...........85.....8 3........................................16 6................................... 8 3..............................................................................13 6 Parameter planning.......................................................8 3......................... 5..............................................................75) and (5..5 2 Principle of AMR codec..... 8............... 4..............2.................. .................................16 Table 11 Load based AMR codec mode selection related configuration parameters..............2..................11 Table 7............................................862.....................18 Table 13 Load based AMR codec mode selection related counters....................18 Copyright © Nokia Siemens Networks 2008 Company confidential Page 4 (22) ..................................................................................................... 15 Table 10 TFO/TrFO related configuration parameters...............................................11 Table 6........ DL performance test result of AMR Codec Modes 12................................ Semi-static transport format configurations for different AMR codec modes.....6 Figure 3.......2 codec modes....................13 Figure 4........ Scope of the Data Performance Optimisation Guide....... Transport format combinations for different AMR codec modes............ Theoretical capacity analysis of different AMR codec modes................2 and 5....2 and 5...................... NPO/NSO Capability Management Date: 7...4........2009 3G AMR Codec Selection Planning and Version 0................ UL performance test result of AMR Codec Modes 12....... AMR codec related 3G RAN features...................................................9 and 12....................................15 Table 9 WB-AMR feature activation parameters...........AMR codec mode selection related counters.......................................7 Table 3..............16 Table 12 WB....................12 Table 8 NB AMR Codec set related configuration parameters.......1 Optimisation Guide in RU10 RAN List of Figures Figure 1..........................................8 Table 4.........................................................................................................9.............. AMR code EbNo estimates................................. Performance of WB-AMR codec compared to NB-AMR with WB speech test P.........14 List of Tables Table 1.............5 Figure 2..................................................6 Table 2......... AMR codec set and transport formats............................. MOS difference between NB-AMR 5............. * Average bit rate with 50% activity..................................10 Table 5.................9............... 2. NPO/NSO Capability Management Date: 7.1 Optimisation Guide in RU10 RAN 1 Introduction The purpose of this guideline is to give guidance for 3G AMR codec selection related planning and optimisation tasks. Report 2.1 and MOS measurements.2006”. “New AMR codecs in RAS5. This guideline concentrates on the new functionality in RU10 RNC with a summary of other AMR codec selection related topics. Scope of the 3G AMR Codec Selection Planning and Optimisation Guideline Copyright © Nokia Siemens Networks 2008 Company confidential Page 5 (22) . AMR codec performance and functionality.2009 3G AMR Codec Selection Planning and Version 0.4. Sakari Sistonen 15. It is strongly recommended that the reader reads also the Reference [1]. Figure 1. 95 AMR mode Yes 75 84 0x60 5.75 AMR mode Yes 42 53 0x60 1. The AMR speech codec creates multiple sub-flows of data and these are transferred in separate radio bearers and transport channels.1 Optimisation Guide in RU10 RAN 2 Principle of AMR codec AMR (Adaptive MultiRate) speech codec supports multiple difference bit rates and possibility to adapt the bit rate during the speech call. AMR codec set and transport formats. AMR codec (Yes.4. Transport format combinations for different AMR codec modes User bit rate Explanation Support in RNC TB size TB size TB size (kbit/s). Table 1.65 AMR-WB Yes 72 181 0x60 mode 8.95 AMR SID Yes 39 0x103 or 0x60 0x63 12. An AMR call can be established with only single bit rate or with multiple bit rates called AMR codec modes (bit rates) forming an AMR codec set.2009 3G AMR Codec Selection Planning and Version 0. the AMR radio link is established with a transport format combination set (TFCS) consisting of multiple transport format combinations (TFC) corresponding the AMR codec modes included in the activated AMR codec set.2 AMR mode Yes 81 103 60 7. NPO/NSO Capability Management Date: 7.85 AMR-WB Yes 64 113 0x60 mode Copyright © Nokia Siemens Networks 2008 Company confidential Page 6 (22) . Table 1 lists the transport block sizes for different AMR codec modes. When an AMR codec set with multiple AMR codec modes is used. No) (bits) of (bits) of (bits) of mode protection protection protection class A class B class C DCH DCH DCH 12. see Admission Control in [3]. Figure 2.9 AMR mode Yes 55 63 0x60 4. Table 2. The AMR codec modes can be different in UL and DL. The AMR codec mode in DL is not adapted in current RAN releases.1 Optimisation Guide in RU10 RAN 6.4.2009 3G AMR Codec Selection Planning and Version 0. . where UE can block the highest bit rates (transport format combinations). Class A DCH Class B DCH Class C DCH Class A DCH Class B DCH Class C DCH static attribute TTI 20 20 20 20 20 20 (ms) Channel Convolutional Convolutional Convolutional Convolutional Convolutional Convolutional coding Coding 1/3 1/3 ½ 1/3 1/3 1/3 rate L1 CRC 12 . Semi-static transport format configurations for different AMR codec modes Narrow-band AMR Wideband-AMR Semi.6 AMR-WB Yes 54 78 0x60 mode 1. - size (bits) Adaptation of the AMR codec mode (bit rate) UE is capable of changing between the AMR codec modes when it detects that it has reached the maximum UL power. The effect of an AMR codec mode on the speech quality is discussed in Section 5. which is the same as the length of the speech frame. when the UL power reaches the maximum (see [25. NPO/NSO Capability Management Date: 7. This is done with a transport format combination selection procedure.133]). Copyright © Nokia Siemens Networks 2008 Company confidential Page 7 (22) . and effect on radio link performance is discussed in Section 4.75 AMR-WB SID Yes 40 0x181 0x60 The AMR connection uses always transport block set size of 1 (1 TB/TTI) and 20 ms TTI. 12 . 85.75) AMR codec sets with multiple AMR codec modes (= bit rates) were introduces in RAS05. This feature enables a RNC functionality to change the AMR codec mode set depending on radio interface load and Iub load conditions in the cell.1 RAS06 RU10 AMR Codec Sets (12.90. load is an average of the transmitted power during a measurement period.6) Wideband AMR Codec Set feature was introduced in RAS06.90. 5.75) and (5.4 Support for Tandem/Transcoder Free Operation Tandem/Transcoder Free Operation (TFO/TrFO) feature in RNC enables the RNC to support this operation mode when supported and requested by core network.5 Load Based AMR Codec Mode Selection Load Based AMR Codec Mode Selection feature is introduced in RU10 release RNC. downlink spreading code load and Iub load can trigger AMR codec mode set changes. It enables the activation of the WB-AMR codec for mobile to mobile calls when this is supported by the UEs and core network. 8. 4. 4.75). Table 3. Radio power.90. 4. Copyright © Nokia Siemens Networks 2008 Company confidential Page 8 (22) .75) Wideband AMR Codec Set (12.2 kbps. 6.1 as extension to basic AMR codec set with only one mode of 12.1 Optimisation Guide in RU10 RAN 3 Product and feature description 3.2 AMR Codec Sets (12.90. AMR codec related RAN Features Feature Number RAS05.85.3 Wideband AMR Codec Set (12. AMR codec related 3G RAN features.95.95. In the radio interface.6) RAN831 Optional Optional Support for Tandem/Transcoder Free Operation RAN134 Optional Optional Optional Load Based AMR Codec Mode Selection RAN580 Optional 3. The Basic AMR feature is basic feature.2. 8.65. The TFO/TrFO feature is required for Wideband AMR Codec Set feature.65. 3. NPO/NSO Capability Management Date: 7. 3.2009 3G AMR Codec Selection Planning and Version 0. For all these triggers there are operator adjustable thresholds.2. The measured power is by default the transmission power used for RT (+ CCCH) traffic. 5. 4.1 Summary of features Following table lists all AMR code mode related Telecom and RRM features with the indication of the feature basic or optional status in different RAN releases.4. 7. 4. 3. 7.90. 6. High average total transmit power of a cell indicates high HSDPA activity and can be used to trigger codec mode set change in this case.75) and RAN830 Optional Optional Optional (5. but alternatively the operator can select total transmitted power (including HSDPA) of the cell or total transmitted power used for non-HSPA traffic (CCCH + DCH). This feature enables the adaptive codec selection in UL (see Section 2) and it also enables the static selection of the lower bit rate codec set of (5. a capacity gain of approximately 60% can be expected in the radio interface and a capacity gain of up to 120% in the Iub/Iur transmission when compared to AMR12. On the other hand.9 on SF256.2. With AMR 5. 3. NPO/NSO Capability Management Date: 7. In the radio interface. More about the AMR code mode performance in Section 4. A 120% Iub transmission gain is expected if the traffic of the cell E1 transmission is composed solely of AMR calls.1 Optimisation Guide in RU10 RAN Downlink spreading code load indicates the percentage of the codes being used.2009 3G AMR Codec Selection Planning and Version 0. The estimated gains are not directly proportional to the bit rate reduction.6 Core network feature dependency The wideband AMR codec together with TFO/TrFO requires support from CS core network.9 kbps than for AMR 12. transmission load is an estimate of the current usage. In the Iub.4. transmission admission control takes the advantage of the multiplexing gains with the higher user amounts.2 kbps due to the difference in SF. a higher energy per bit rate is required for the AMR 5. Copyright © Nokia Siemens Networks 2008 Company confidential Page 9 (22) . based on the maximum bit rates and the activity factors of the ongoing DCH connections. 5 WB-AMR 6. Table 4. DPCCH bit Total L1 Difference Downlink rate DPDCH bit rate* bit rate Eb/N0 AMR12.33 8.89 4.85 kbps 2.0 1.0 1.56 2.10 8.9 AMR 7.25 7.9 DPCCH bit Total L1 Difference Uplink rate DPDCH bit rate bit rate Eb/N0 AMR12.6 AMR 5.56 4.5 1.38 4.5 0. Copyright © Nokia Siemens Networks 2008 Company confidential Page 10 (22) .9 kbps 6.1 Optimisation Guide in RU10 RAN 4 Effect of AMR codec mode on link and network performance 4. AMR code EbNo estimates.1 AMR 5.98 6.56 6.33 5.33 12.15 2.1 AMR 4.2009 3G AMR Codec Selection Planning and Version 0.94 7. EbNo calculation for different AMR codec modes The performance of the AMR code modes 12.2 kbps 6.13 8.65 kbps 6.95 9.95 5.23 3.1 WB-AMR 8.66 8. In the static test the EbNo is clearly lower than the planned EbNo value.6 kbps 2.43 10.2 kbps 2.15 6.6 kbps 6.9 kbps 2.9 were compared in [1].9 AMR 4. (* Average bit rate with 50% activity).43 6.56 2. but the EbNo difference (1.33 9.56 3.56 3. NPO/NSO Capability Management Date: 7.3 1.85 kbps 6.xls File 1.95 kbps 2.99 5.75 kbps 2.75 kbps 6.8 WB-AMR 6.4 0.2 and 5.53 9.6 AMR EbNo HHo.9 dB). Table 5 shows the UL results of this static test.2 AMR 12.0 WB-AMR 8.4.15 3.4 1.10 9.10 12.65 kbps 2.51 6.23 6.56 8.54 5.6 WB-AMR 12. The effect of overhead has been calculated in File 1 and presented in Table 4.23 4.66 4.3 -0.89 6.2 0.38 8.5 WB-AMR 12.9 0.2 AMR 12.56 7.95 kbps 6.15 2.56 6.0 2.8 0.7 dB) is quite close to the theoretical (1.1 EbNo of AMR codec modes The planned EbNo values in NSN dimensioning and planning include the DPCCH and SRB overheads.4 AMR 7. Thus the required EbNo for the different AMR codec modes varies due to different overhead.98 10. 4.9 kbps Difference Comment Load test 1.2009 3G AMR Codec Selection Planning and Version 0. DL performance test result of AMR Codec Modes 12. DL Channelisation code resource and Iub. Average Txpower (dBm) -22. The air interface capacity gain can be estimated with analytical capacity calculations or by measurements.79 1.9 kbps Difference Comment Test 1.5 dB both in EbNo and required transmit power.06 -23.4.07 1.2 and 5.13 4.85 5. Average UL Eb/No (dB) 3.9.2 Link budget and coverage The AMR link budget and cell range are typically uplink limited.1 Load test 2. AMR performance (UL) UE TxPower AMR 12.9 kbps codec mode in static conditions. It indicates that usage of lowest NB-AMR mode of 4. Average Txpower (dBm) 3.9. UL performance test result of AMR Codec Modes 12.3 Capacity The performance gain in required EbNo translates also to capacity gain in air interface.96 2. The performance difference is quite close to 1. Table 7 shows theoretical capacity analysis of different AMR codec modes.65 5.5 Test 2. 4. The measurement results in Table 5 and Table 6 show a 1-2 dB lower transmit power requirement for the 5.08 1.2 and 5.34 1.0 UL fractional load (uplink Eb/No) AMR 12.1 Load test 3. It concludes that the effect of the codec mode is maximum 15% on cell range and 20-25% on cell coverage area. Copyright © Nokia Siemens Networks 2008 Company confidential Page 11 (22) . [1] contains link budget comparisons for the different NB-AMR codec modes.26 1.7 Table 6 shows the results of the DL performance test of AMR Codec Modes 12.75 kbps would give 33% capacity gain in UL and 62% in DL.1 Optimisation Guide in RU10 RAN Table 5.8 Average 3.2 and 5. Average UL Eb/No (dB) 3.2 kbps AMR 5. Thus the potential sensitivity gain in uplink can be utilised for better coverage or higher cell range.9.97 5. Average UL Eb/No (dB) 3.2 kbps AMR 5. Table 6.58 1. NPO/NSO Capability Management Date: 7. 4. 4. Copyright © Nokia Siemens Networks 2008 Company confidential Page 12 (22) . RU10 RAN supports this with the optional Load Based AMR Codec Mode Selection. NPO/NSO Capability Management Date: 7. respectively doubling the code capacity available for AMR calls. The DL code tree capacity gain can be used when the DL AMR channel spreading factor is changed from 128 to 256. because there is no overhead from DPCCH. Theoretical capacity analysis of different AMR codec modes. The Iub capacity gain is directly proportional to the codec bit rate.2009 3G AMR Codec Selection Planning and Version 0. In Iub bit rate the capacity gain is higher.4 KPI performance The effect of lower AMR codec modes to the network KPI performance is TBD.1 Optimisation Guide in RU10 RAN Table 7. Figure 3 present the measured MOS difference between the NB-AMR codec modes.862.862.2 codec modes.2.1 (NB MOS measurement).2009 3G AMR Codec Selection Planning and Version 0. The results show that the WB-AMR can provide clearly better speech quality with same bit rate as expected. The WB-AMR performance was also measured in [3]. The NB-AMR codec was measured with the same test for comparison purposes.9 and 12. Figure 3. NPO/NSO Capability Management Date: 7.4. The results indicate a clear drop of up to 0. Copyright © Nokia Siemens Networks 2008 Company confidential Page 13 (22) . It was noted in.8 on MOS scale P.1 Optimisation Guide in RU10 RAN 5 Effect of AMR codec mode on voice quality The usage of lower AMR codec modes will decrease the voice quality. The NB-AMR codec voice quality with the modes were measured in [1] also with different measurement equipment and more recently in [4]. that the WB AMR test gives lower MOS score for the NB AMR codec than the NB AMR test. The WB codec is measured according to WB codec measurement P. MOS difference between NB-AMR 5. 2.862.4. Copyright © Nokia Siemens Networks 2008 Company confidential Page 14 (22) . NPO/NSO Capability Management Date: 7.2009 3G AMR Codec Selection Planning and Version 0. Performance of WB-AMR codec compared to NB-AMR with WB speech test P.1 Optimisation Guide in RU10 RAN Figure 4. Bit 2: CS AMR codec set (5. 4. before the Wideband Codec Set can be activated  The feature must be activated under all WCELs under one RNC Copyright © Nokia Siemens Networks 2008 Company confidential Page 15 (22) .8 (10).48 0.2) set (12. The PeriodULRCAMR parameter defines the minimum period for consecutive RRC UL TFC control messages to be sent to the UE on DCCH using AM RLC. 0.76 (9).90.75) and (5.52 (3). 6.64 (6). 4. Bit 1: CS AMR codec set (12.. 4. 5.1 Optimisation Guide in RU10 RAN 6 Parameter planning 6. 4. 0.2).96 (14). 6.1080 kbps 35 kbps PeriodULRCAMR RNC 0.95.4 (0).2.2). 0. 4. the parameter DLpuncturingLimit should have the default value of 0. NPO/NSO Capability Management Date: 7.90. 4. Table 8 NB AMR Codec set related configuration parameters Parameter Scope Range Default CSAMRModeSET WCEL Bit 0: CS AMR codec 0 (only 12. 0.95.. 7.2. 4.75) and (5. Other pre-requisite is a valid licence (FIFILE licence)..68 Puncturing from 1/3 to 1/2 coding rate (7). 8. 0.2.2) and (5.75). (5.95.75) is that all three sets (12.72 (8).90.75).88 (12). 4. 1 No puncturing is used.44 (1).75). 4.95. 0. 0.2009 3G AMR Codec Selection Planning and Version 0.9.2. 5.84 (11). 4. in MGW and MSS. The recommended configuration for a cell that permits the set (12. 0.75) is that only the sets (12.9.9.75) The WB-AMR codec set is enabled with the parameter CSAMRModeSET.6 (5) (2).255 s 255 (OFF) The active AMR codec sets are selected with the CSAMRModeSET parameter. 7. 4. 5. that is. 4.9.95.2.6) The WB-AMR codec set is enabled with the parameter CSAMRModeSETWB.2.9.85. 5.95.9.. For AMR codec sets (12. The recommended configuration for a cell that permits the set (5.6 (5).75) but not the set (12.75) DLpuncturingLimit RNC 0.75) are set. 7.9. 0.90. 0.65. 5. (15) DLmaxBitRateSF256 RNC 0. 7.2 Wideband AMR Codec Set (12. 0.60 and the parameter DLmaxBitRateSF256 the default value of 35kbps. 7. 7.75) are set.4. 0.1 AMR Codec Sets (12. 5. 0.56 (4). Other pre- requisites are:  Valid licence (FIFILE licence)  Feature activation in Core Network Elements.92 (13).9. 0. and (12. 3 Support for Tandem/Transcoder Free Operation The parameter PeriodULRCAMR is used for activation of the TFO/TrFO in the RAN side.2009 3G AMR Codec Selection Planning and Version 0.9.6 (5) (2).90.90.75) and (5.6} 6. 5. 5. 0.84 (11). 4. activate 8.2).88 (12).6 (5).255 s 255 (OFF) 6. Table 9 WB-AMR feature activation parameters Parameter Scope Range Default CSAMRModeSETWB WCEL Bit 0: CS WAMR 0.75) set (12. Bit 1: CS and (5. (15) PtxTarget WCEL -10.75) are AMR codec set (12. 0. 0. 0.76 (9). 0. 0.95..72 (8).8 (10).4 (0). Copyright © Nokia Siemens Networks 2008 Company confidential Page 16 (22) . 0.65.68 Puncturing from 1/3 to 1/2 coding rate (7).4 Load Based AMR Codec Mode Selection The Load Based AMR Codec Mode Selection is enabled with the parameter LoadBasedAMRCodecMode. 0. 7. 0. enabled {default 0..48 0.95. 1 No puncturing is used. Table 10 TFO/TrFO related configuration parameters Parameter Scope Range Default PeriodULRCAMR RNC 0.9.64 (6). NPO/NSO Capability Management Date: 7. 4.50 40 dBm CSAMRmodeSET WCEL Bit 0: CS AMR codec (12. see Table 11 Table 11 Load based AMR codec mode selection related configuration parameters Parameter Scope Range Recommended {Default} LoadBasedAMRCodecMode RNC enabled (1) {default enabled (1) {default disabled (0)} disabled (0)} DLPuncturingLimit RNC 0.96 (14). 4. 0. 0. 0.4.75)  Check related parameters. 0. 7..92 (13). 6. 4.1 Optimisation Guide in RU10 RAN Table 9 lists the related parameters.85.2.52 (3).44 (1). In addition it needs to be activated in the MSS and in the MGW.56 (4). 0.2.2.. change to 1 to codec set {12. Other pre-requisites are:  Valid licence (FIFILE licence) for the features Load Based AMR Codec Mode Selection and AMR Codec Sets (12. .. Bit 2: 12... step 0..15 dB...1 AMROverTxNonHSPA WCEL dB 0 dB AMRTargetSC WCEL 0...4.9 0.75) PtxTotal (0).9... step 1 % 0.1 AMRTargetTxTotal WCEL dB 0 dB -15. step 1 % 0. Parameter value ‘PtxnonHSPA’ sets the power criteria to follow the non-HSPA power .75).1 AMRTargetTxNonHSPA WCEL dB -1 dB AMRUnderSC WCEL 0.10000 kbit/s.. step 0.1 Optimisation Guide in RU10 RAN 7.100 %.1 AMRTargetTxNC WCEL dB -2 dB -15.7 0.. step 0.15 dB... step 0. step 800 kbit/s s or 80% of AMRTargetTransmission WCEL 100 kbit/s Iub TP -15.15 dB.... Copyright © Nokia Siemens Networks 2008 Company confidential Page 17 (22) .. 5.. step 0.5 0.9. step 0.2 kbps} CS AMR codec set (5.10000 kbit/s.100 %.... Parameter value ‘Ptxnctotal’ sets the power criteria to follow the non-controllable DL power.1 AMROverTxNC WCEL dB -1 dB -15.1 AMROverTxTotal WCEL dB 2 dB -15. This measures the total averaged transmit power including average HSDPA power of the BTS in the corresponding cell.10000 kbit/s. step 0.2009 3G AMR Codec Selection Planning and Version 0. step 200 kbit/s s or 20% of AMRUnderTransmission WCEL 100 kbit/s Iub TP -15.15 dB.95. which includes the power of the CCCHs. NPO/NSO Capability Management Date: 7... step 0..15 dB. Parameter value ‘PtxTotal’ sets the power criteria to follow the PtxTotal measurement from BTS. step 0. RT and non-RT services on DCH.15 dB. which includes the power of the CCCHs and RT services.15 dB. AMRLoadTxPower RNC PtxnonHSPA (2) Ptxnctotal (1) AMROverSC WCEL 0. step 1 % 0. Ptxnctotal (1)..100 %.15 dB. step 900 kbit/s or 90% of AMROverTransmission WCEL 100 kbit/s Iub TP -15..15 dB. 4.1 AMRUnderTxTotal WCEL dB -10 dB -15..1 AMRUnderTxNonHSPA WCEL dB - The AMRLoadTxPower parameter is used to select the used DL power criteria for the AMR codec mode set selection. 4.1 AMRUnderTxNC WCEL dB -10 dB -15.. 4. DL power criteria. AMR codec mode set selection for DL power criteria for new AMR calls. Copyright © Nokia Siemens Networks 2008 Company confidential Page 18 (22) . Figure 6. In case of new calls the lower bit rate codec mode set is selected if the load exceeds the target threshold of any active criteria. NPO/NSO Capability Management Date: 7. Figure 6 presents the selection criteria for new calls in case of DL power load and the three different power criteria described above.2009 3G AMR Codec Selection Planning and Version 0. The AMR codec mode set is upgraded for ongoing calls if all load criteria are smaller than the underload threshold of the criteria.1 Optimisation Guide in RU10 RAN Figure 5. The AMR codec mode set is downgraded for ongoing calls if any load criteria exceed the overload threshold of the criteria. that is. 6. before the can be activated. AMR codec mode set selection for DL power criteria for ongoing AMR calls.5 Core network The Wideband Codec Set and TFO/TrFo features require also feature activation in Core Network Elements. in MGW and MSS.1 Optimisation Guide in RU10 RAN Figure 7.4. Copyright © Nokia Siemens Networks 2008 Company confidential Page 19 (22) .2009 3G AMR Codec Selection Planning and Version 0. NPO/NSO Capability Management Date: 7. which includes allocation and duration counters for each AMR codec mode.AMR codec mode selection related counters Counter ID Measurement Counter name M1002C487 Traffic ALLO_FOR_WAMR_12_65_SRNC M1002C488 Traffic ALLO_FOR_WAMR_6_6_SRNC M1002C489 Traffic DURA_FOR_WAMR_12_65_SRNC M1002C490 Traffic DURA_FOR_WAMR_6_6_SRNC M1002C491 Traffic ALLO_FOR_WAMR_12_65_DRNC M1002C492 Traffic ALLO_FOR_WAMR_8_85_DRNC M1002C493 Traffic ALLO_FOR_WAMR_6_6_DRNC M1002C494 Traffic DURA_FOR_WAMR_12_65_DRNC M1002C495 Traffic DURA_FOR_WAMR_8_85_DRNC M1002C496 Traffic DURA_FOR_WAMR_6_6_DRNC M1002C497 Traffic SWI_FROM_WAMR_TO_NAMR_SRNC M1002C498 Traffic SWI_FROM_NAMR_TO_WAMR_SRNC M1002C499 Traffic SWI_FROM_WAMR_TO_NAMR_DRNC M1002C500 Traffic SWI_FROM_NAMR_TO_WAMR_DRNC Load Based AMR Codec Mode Selection feature introduces new sets of counters in Cell Resource M1000 measurements for load triggering and in Traffic M1002 for codec changes and SF256/SF128 usage. Table 13 Load based AMR codec mode selection related counters Counter ID Measurement Counter name M1000C288 Cell_Resource AMR_TXPOW_LOAD_UNDERLOAD M1000C289 Cell_Resource AMR_TXPOW_LOAD_BELOW_TARGET M1000C290 Cell_Resource AMR_TXPOW_LOAD_OVER_TARGET M1000C291 Cell_Resource AMR_TXPOW_LOAD_OVERLOAD M1000C292 Cell_Resource AMR_CODE_LOAD_UNDERLOAD M1000C293 Cell_Resource AMR_CODE_LOAD_BELOW_TARGET M1000C294 Cell_Resource AMR_CODE_LOAD_OVER_TARGET M1000C295 Cell_Resource AMR_CODE_LOAD_OVERLOAD M1000C296 Cell_Resource AMR_TRANSM_LOAD_UNDERLOAD M1000C297 Cell_Resource AMR_TRANSM_LOAD_BELOW_TARGET Copyright © Nokia Siemens Networks 2008 Company confidential Page 20 (22) .4. NPO/NSO Capability Management Date: 7.2009 3G AMR Codec Selection Planning and Version 0.1 Optimisation Guide in RU10 RAN 7 Performance monitoring and optimisation The main AMR codec mode related counters are included in Traffic measurements (M1002). The WB-AMR codec feature brings additional counters for the WB-AMR allocations and durations together with counters for switches between NB-AMR and WB-AMR codec types. Table 12 WB. NPO/NSO Capability Management Date: 7.2009 3G AMR Codec Selection Planning and Version 0.1 Optimisation Guide in RU10 RAN M1000C298 Cell_Resource AMR_TRANSM_LOAD_OVER_TARGET M1000C299 Cell_Resource AMR_TRANSM_LOAD_OVERLOAD M1002C561 Traffic AMR_LOWER_CODEC_SF128_INC M1002C562 Traffic AMR_LOWER_CODEC_SF256_INC M1002C563 Traffic LOAD_AMR_DGR_SF128_SUCCESS M1002C564 Traffic LOAD_AMR_DGR_SF256_SUCCESS M1002C565 Traffic LOAD_AMR_UPGRADE_SUCCESS M1002C566 Traffic AMR_CODEC_CHANGE_FAIL_ICSU M1002C567 Traffic AMR_CODEC_CHANGE_FAIL_OTHER Copyright © Nokia Siemens Networks 2008 Company confidential Page 21 (22) .4. 2006 [2] 3G Radio Network Planning Guidelines for RAS06 and RU10 https://sharenet-ims. delays and handover audio breaks Copyright © Nokia Siemens Networks 2008 Company confidential Page 22 (22) .com/Open/363676257 [3] RU10 Product Documentation. AMR codec performance and functionality.inside.2009 3G AMR Codec Selection Planning and Version 0. NPO/NSO Capability Management Date: 7. Subjective and objective speech quality testing.2. Sakari Sistonen 15.1 Optimisation Guide in RU10 RAN References [1] New AMR codecs in RAS5.1 and MOS measurements. System Library [4] Summary of RAS06 speech quality tests.nokiasiemensnetworks. Report 2.4.