HSDPA 参数简介.doc

1.1.1 PS掉话分析处理：PS R99业务掉话：定义：PS 相关RAB非正常释放记为PS掉话。相关指标R99分组域业务掉线率：(pmNoSystemRabReleasePacketStream+pmNoSystemRabReleasePacketStream128+pmNoSystemRabReleasePacket-pmNoSystemRbReleaseHs)/(pmNoNormalRabReleasePacketStream+ pmNoSystemRabReleasePacketStream+pmNoNormalRabReleasePacketStream128+pmNoSystemRabReleasePacketStream128+pmNoNormalRabReleasePacket+pmNoSystemRabReleasePacket - pmNoSystemRbReleaseHs -pmNoNormalRbReleaseHs) * 100%HSDPA业务掉话：定义：HSDPA相关RAB非正常释放记为HSDPA掉话。相关指标HSDPA分组域业务掉话率(pmNoSystemRbReleaseHs + pmNoSystemRabReleasePsStreamHs)/ (pmNoNormalRbReleaseHS+pmNoSystemRbReleaseHS+pmNoSystemRabReleasePsStreamHs+pmNoNormalRabReleasePsStreamHs+pmPsIntHsToFachSucc) *100%HSUPA业务掉话：定义：HSUPA相关RAB非正常释放记为HSUPA掉话。相关指标：HSUPA分组域业务掉话率：pmNoSystemRbReleaseEul/(pmNoSystemRbReleaseEul+ pmNoNormalRbReleaseEul+ pmPsIntHsToFachSucc)PS业务掉话原因分类：PS业务掉话情况与CS业务掉话具有相关性，很多时候我们可以借助处理CS掉话小区，对PS掉话的情况进行处理与解决。但是，PS掉话与CS业务相比，也有其特殊性。以下为引起PS业务掉话的主要原因分类：无线环境原因（下行）分析RSCP、Ec/No，分析是否存在弱覆盖、导频干扰等情况。上行干扰原因由于上行干扰过高，导致数据业务非正常释放。上行干扰可能来自系统内，也可能来自外部干扰。上行干扰情况网络中可通过相关counter对RTWP的值进行统计：RTWP= pmSumUlRssi/pmSamplesUlRssi拥塞原因包括了码字拥塞、硬件资源拥塞（CE）、功率拥塞等。（该部分内容在资源利用性能优化方法中将进行详细探讨）其它原因通过RNC、核心网的测量追踪掉话事件，分析掉话原因。PS掉话处理流程：检查基站告警，确认基站工作状态是否正常对掉话小区的CS掉话指标进行分析比对收集基站上行干扰统计,确认是否存在过高的上行噪声分析掉话小区的覆盖范围及信号覆盖情况通过网络测试追踪手段对问题站点进行测试分析，以定位故障现场对小区PS业务进行验证测试1.1.2 数据业务吞吐率：定义：数据业务吞吐率作为QOS的一个重要指标，可以对上下行信道分别定义，通过信道传输的数据量与信道传输时间进行计算：信道吞吐率=信道传输数据量/信道传输时间相关指标：PS R99下行平均吞吐率：pmSumDchDlRlcTotPacketThp/pmSamplesDchDlRlcTotPacketThpPS R99上行平均吞吐率：pmSumDchUlRlcTotPacketThp/pmSamplesDchUlRlcTotPacketThpHSDPA下行平均吞吐率：pmSumHsDlRlcTotPacketThp/pmSampleHsDlRlcTotPacketThpHSUPA上行平均吞吐率：pmSumEulRlcTotPacketThp/pmSampleEulRlcTotPacketThp影响因素：参数配置对PDU格式、CQI测量偏置等参数进行优化配置，如codeThresholdPdu656、，具体参见HSDPA/HSUPA相关参数。码资源限制可以通过预留更多的码字给HSDPA用户，以保证HS用户的吞吐率，但是，这样同时会牺牲R99业务的容量。无线环境对于由于无线环境原因造成的数据吞吐率低的情况，需要根据造成无线环境较差的原因，采取相应的改善措施，如：对于弱覆盖的情况需要加站解决；对于导频干扰的情况，需要对相关小区的天线进行调整。传输资源限制由于传输资源的限制导致吞吐率过低，则需要检查传输质量或者增加传输进行解决。HSDPA主要参数： 小区HS-PDSCH最大码数参数名：maxNumHsPdschCodes参数描述：在HSDPA动态码分配方式下，后台配置的HS-PDSCH信道码最大个数。参数取值范围：5.15推荐值：10参数设置对网络影响：设置值可以偏大一些，以便有能力的终端得到较多的码字。参数级别：CELL级 小区HS-PDSCH码数参数名：numHsPdschCodes参数描述：用做HS-PDSCH的SF=16的码字数。参数取值范围：1.15推荐值：5参数设置对网络影响：HS-PDSCH信道码个数分配太小可能会影响HSDPA的性能，使得HSDPA码资源受限，但是如果信道码分配太大又可能会使得码资源浪费，从而增加R99业务由于码资源导致的准入拒绝率。参数级别：CELL级 小区HS-PDSCH码数参数名：numHsPdschCodes参数描述：用做HS-PDSCH SF=16的码字数。参数取值范围：1.15推荐值：5参数设置对网络影响：HS-PDSCH信道码个数分配太小可能会影响HSDPA的性能，使得HSDPA码资源受限，但是如果信道码分配太大又可能会使得码资源浪费，从而增加R99业务由于码资源导致的准入拒绝率。参数级别：CELL级 PDU656使用门限参数名：codeThresholdPdu656参数描述：针对7至10类手机，用来决定何时使用RLC层PDU656包的门限。参数单位：码字参数取值范围：0.15参数值映射如下：0: 总用656bit15: 从不用656bit其余值:如果codeThresholdPdu656 = numHsPdschCodes 用336bit的包推荐值：6参数设置对网络影响：此参数设置需要根据小区的覆盖和无线环境情况来定，无线环境好的情况下可以采用PDU656的包，这样可以提高HSDPA业务的吞吐率。参数级别：CELL级 CQI反馈周期参数名：cqiFeedbackCycle 参数描述：用做HS-DPCCH上CQI反馈周期的持续时间。参数取值范围：0.0 2.2 4.4 8.8 10.10 20.20 40.40 80.80 160.160推荐值：8参数设置对网络影响：参数设置小，则对CQI的反馈持续时间短，对环境的反应快，HS速率的变化较快。参数设置大，则对CQI的反馈持续时间长，对环境的反应慢，HS速率的变化较慢。参数级别：CELL级下行发射功率资源：下行发射功率作为WCDMA系统中的受限资源，被各物理信道共享，包括了业务信道与信令控制信道。WCDMA中的下行发射功率按信道类型主要分为3类：CCH、DCH和HSDPA。下行功率接入控制： 基站对非HSDPA业务和HSDPA业务的下行发射功率进行监测，并将监测结果汇报给RNC，作为资源接入控制的依据； 当非HSDPA业务的下行发射功率超过门限（pwrAdm）时，基站将监测结果汇报给RNC，将启动接入控制； 当非HSDPA业务的下行发射功率低于门限（pwrAdm）时，基站将监测结果汇报给RNC，接入控制解除；下行Non-HS功率小区拥塞：如下图所示，当下行Non-Hs发射功率超过门限pwrAdm+pwrOffset，且保持时间超过pwrHyst时，即可触发小区拥塞。当下行Non-Hs发射功率低于门限pwrAdm+pwrOffset，且保持时间超过pwrHyst时，小区拥塞解除。下行HSDPA功率拥塞：指标体现：小区RAB建立拥塞率（功率资源受限）该指标主要反映小区发生拥塞时由于功率资源受限原因所占的比例，计算公式如下：pmNoFailedRabEstAttemptLackDlPwr/(pmNoRabEstablishAttemptPacketStream+pmNoRabEstablishAttemptPacketStream128+pmNoRabEstAttemptPsStreamHs+pmNoRabEstablishAttemptSpeech+pmNoRabEstablishAttemptCs64+pmNoRabEstablishAttemptCs57+pmNoRabEstablishAttemptPacketInteractive)*100%主要Counter解释：Counter Name pmTransmittedCarrierPowerNonHs Description The transmitted carrier power for all non high-speed codes in the cell. MO Class HsDschResources Condition The transmitted carrier power measured at the TX reference point every 100 ms. The value is stored as a PDF step range with resolution of 1 dBm, 52 long (050 dBm) The first value, 0 = 0, and the last value, 51 = 50 , are exempt from the resolution. Counter Type PDF Unit Number of samples in range Counter Name pmTransmittedCarrierPowerHs Description Measurement to observe the distribution of transmitted carrier power for all codes used for transmission of HSDPA channels including HS-PDSCH, HS-SCCH, E-AGCH, E-RGCH and E-HICH. MO Class HsDschResources Condition The transmitted carrier power measured at the TX reference point every 100 ms. PDF ranges: (resolution 1dBm with range from 0 up to 50 dBm). The PDF range shall be 0, 51 as follows: transmittedCarrierPower0 number of sampled values less then 0 transmittedCarrierPower1 number of sampled values in range 0.1 transmittedCarrierPower2 number of sampled values in range 1.2 . transmittedCarrierPower50 number of sampled values in range 49.50 transmittedCarrierPower51 number of sampled values greater or equal to 50 Counter Type PDF Unit dBm longnoNotificationnonPersistentreadOnlypmNoFailedRabEstAttemptLackDlPwr Number of failed RAB establishment attempts due to lack of DL power.Condition:Incremented by one when admission control fails with reject reason lack of DL power.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes 1.2 码资源优化 下行码字使用率对于每个小区而言，下行码字资源都是有限的，下行码字监控可测量下行码字是否被占用，基于监控下行码字的使用率对下行码字的使用情况进行监控。下行码字分配根据信道类型类型主要分成3类，分别是：CCH专用码字、HSDPA专用码字和DCH信道码字，其中DCH信道码字在“动态码字分配”功能激活的前提下，可在DCH和HSDPA间动态使用，如下图所示：码字使用率公式如下所示： (Sum user (1 / SF user) + Sum cch ( 1 / SF cch)/(1p/16) 其中: SF user DCH信道占用的下行扩频因子SF CCH 公共信道占用的下行扩频因子，包括：HS-SCCH, E-HICH, E-RGCH, E-AGCH as well as MTCH, MICH and MCCH channels for MBMS p 预留给HS-DSCH的码字数量 当有新业务接入申请下行码字资源时，系统对当前小区的码字使用情况进行评估，决定是否允许接入： 当码字使用率（包括当前占用的码字与新用户接入所需码字）低于下行码字接入门限（DlCodeAdm）时，允许用户接入 当下行码字使用率高于DlCodeAdm门限时，将启动接入控制 当码字使用率达到100%时，所有的接入请求将被拒绝 下行扩频因子资源控制各主要业务类型对应的扩频因子如下表所列：RAB类型SF ULSF DLVoice Call64128Vedio Call163264/HSDPA16*384/HSDPA4*PS 64/641632PS 64/128832PS 64/384168PS 128/128816PS 384/38448下行扩频因子资源控制对保证性业务和非保证性业务采用不同的判别方式，对于非保证性业务： 当下行SF8使用率超过门限sf8Adm时，下行SF8的接入请求将被拒绝 当下行SF16使用率超过门限sf16Adm时，下行SF16的接入请求将被拒绝 当下行SF32使用率超过门限sf32Adm时，下行SF32的接入请求将被拒绝对于保证性业务，当下行SF16使用率超过门限sf16gAdm时，接入请求将被拒绝。 上行各扩频因子资源控制上行扩频因子资源控制对保证性业务和非保证性业务也采用不同的判别方式，对于非保证性业务： 当上行SF4使用率超过门限sf4AdmUl时，上行SF4的接入请求将被拒绝 当上行SF8使用率超过门限sf8AdmUl时，上行SF8的接入请求将被拒绝 当上行SF16使用率超过门限sf16AdmUl时，下行SF16的接入请求将被拒绝对于保证性业务，当上行SF8使用率超过门限sf8gAdmUl时，接入请求将被拒绝。指标体现：小区RAB建立拥塞率（码资源受限）该指标主要反映小区发生拥塞时由于码资源受限原因所占的比例，计算公式如下：pmNoFailedRabEstAttemptLackDlChnlCode/(pmNoRabEstablishAttemptPacketStream+pmNoRabEstablishAttemptPacketStream128+pmNoRabEstAttemptPsStreamHs+pmNoRabEstablishAttemptSpeech+pmNoRabEstablishAttemptCs64+pmNoRabEstablishAttemptCs57+pmNoRabEstablishAttemptPacketInteractive)*100%主要Counter包括：longnoNotificationnonPersistentreadOnlypmNoFailedRabEstAttemptLackDlChnlCode Number of failed RAB establishment attempts due to lack of DL channelization codes.Condition:Incremented by one when admission control fails with reject reason lack of DL channelization codes.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes 1.3 CE资源优化在爱立信的WCDMA系统中，用CE（Channel Element）来表示硬件容量和无线承载业务所要消耗的硬件资源。CE有上下行之分，各种业务对应需消耗的CE资源不尽相同，对应CE的数量如下表所列，HSDPA不消耗CE资源。CE ladderULDLSpeech 12.211CS 644264/HSDPA4384/HSDPA16PS 64/6442PS 64/12844PS 64/38448PS 128/12884PS 384/384168EUL8在现网中，针对不同类型的站点（配置、站型），所配置的上下行CE数量有所不同，这主要是由License来控制。通过基站参数licenseCapacityRbsChannel ElementsDownlink和licenseCapacityRbsChannelElementsUplink可查询当前基站的可用上下行CE数量。longnoNotificationnonPersistentreadOnlylicenseCapacityRbsChannelElementsDownlink 0.2147483647 Indicates the licensed capacity limit for RBS Channel Elements Downlink. The value reflects the downlink capacity value in the license key. In case license key is disabled (see licenseStateRbsChannelElementsDownlink), the value is undefined (0). The value is not affected by Licensing Emergency Unlock.Unit: 1 CE Undefined value: 0Dependencies: Actual allowed number of downlink channel elements also depends on the value of the attribute availableRbsChannelElementsDownlink. longnoNotificationnonPersistentreadOnlylicenseCapacityRbsChannelElementsUplink 0.2147483647 Indicates the licensed capacity limit for RBS Channel Elements Uplink. The value reflects the uplink capacity value in the license key. In case license key is disabled (see licenseStateRbsChannelElementsUplink), the value is undefined (0). The value is not affected by Licensing Emergency Unlock.Unit: 1 CE Undefined value: 0Dependencies: Actual allowed number of downlink channel elements also depends on the value of the attribute availableRbsChannelElementsUplink. 以下列出山东主要站型的上下行CE配置：基站类型基站配置CE ULCE DL1室外基站S111（高配置）2401322室外基站S111（中配置）144843室内基站室内覆盖站1/1/115648系统会分别监控上、下行的硬件使用情况，当硬件使用率超出相应门限后，将启动接入控制与拥塞： 下行CE使用率超过dlHwAdm时，部分业务接入请求将被拒绝； 下行CE使用率达到100%时，所有业务接入请求被拒绝； 上行CE使用率超过ulHwAdm时，部分业务请求被拒绝； 上行CE使用率达到100%时，所有业务接入请求被拒绝。体现指标：小区RAB建立拥塞率（CE资源受限）该指标主要反映小区发生拥塞时由于CE资源受限原因所占的比例，计算公式如下：(pmNoFailedRabEstAttemptLackDlHw+pmNoFailedRabEstAttemptLackUlHw)/(pmNoRabEstablishAttemptPacketStream+pmNoRabEstablishAttemptPacketStream128+pmNoRabEstAttemptPsStreamHs+pmNoRabEstablishAttemptSpeech+pmNoRabEstablishAttemptCs64+pmNoRabEstablishAttemptCs57+pmNoRabEstablishAttemptPacketInteractive)*100%NodeB上行CE平均占有率pmSumCapacityUlCe/pmSamplesCapacityUlCeNodeB下行CE平均占有率pmSumCapacityDlCe/pmSamplesCapacityDlCe主要的counter包括：longnoNotificationnonPersistentreadOnlypmNoFailedRabEstAttemptLackDlHw Number of failed RAB establishment attempts due to lack of DL hardware resources.Condition:The counter is incremented for the IubLink containing the first cell to fail admission in the active set.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes longnoNotificationnonPersistentreadOnlypmSumCapacityUlCe Aggregate of all sample values (measurement_value) recorded within the ROP for number of used UL Channel Elements.Counter type: ACCCounter is reset after measurement interval: YesCondition: A new sampled value is added each second of the granuality period. The actual measurement is started when MO UplinkBaseBandPool is created.Undefined value: -1 longnoNotificationnonPersistentreadOnlypmSumCapacityDlCe Aggregate of all sample values (measurement_value) recorded within the ROP for number of used DL Channel Elements.Counter type: ACCCounter is reset after measurement interval: YesCondition: A new sampled value is added each second of the granuality period. The actual measurement is started when the DownlinkBaseBandPool is created.Undefined value: -1 longnoNotificationnonPersistentreadOnlypmNoFailedRabEstAttemptLackUlHw Number of failed RAB establishment attempts due to lack of UL hardware resources.Condition:The counter is incremented for the IubLink containing the first cell to fail admission in the active setCounter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes 1.4 空中接口负荷资源为评估各种无线承载的接入对上下行空中接口负荷的影响，爱立信系统引入了ASE这一概念，分别衡量各种业务的接入对空口负荷的增加程度。它是以普通话音业务（CS 12.2k）为基准的。各主要的业务承载上下行对应的ASE数如下表所列：Radio Connection Type Uplink ASEs Downlink ASEs stand-alone SRB 13.6 kbps 0.45 0.45 conversational CS speech 12.2/12.2 kbps 1.12 1.12 conversational CS speech 7.95/7.95 kbps 0.77 0.77 conversational CS speech 5.9/5.9 kbps 0.61 0.61 conversational CS speech (12.65, 8.85, 6.60) 1.15 1.17 conversational CS 64/64 kbps 10.61 10.61 interactive PS 16/16 2.88 2.88 streaming PS 16/64 4.25 10.10 interactive PS 64/128 7.83 15.54 interactive PS 64/384 kbps 7.83 39.78 interactive PS 384/384 39.78 39.78 interactive PS 64/HS kbps 7.83 0.12 interactive PS(EUL/HS) 0.45 0.12 conversational CS speech 12.2/12.2 kbps + interactive PS 64/64 kbps 8.83 8.83 ASE接入控制将对上、下行的ASE使用率进行监控： 当小区的下行ASE使用率超过aseDlAdm时，部分业务接入请求被拒绝； 当小区的上行ASE使用率超过aseUlAdm时，部分业务接入请求被拒绝；longnoNotificationnonPersistentreadOnlypmNoFailedRabEstAttemptLackUlAse Number of failed RAB establishment attempts due to lack of UL ASE.Condition:Incremented by one when admission control fails with reject reason lack of UL ASE.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes longnoNotificationnonPersistentreadOnlypmNoFailedRabEstAttemptLackDlAse Number of failed RAB establishment attempts due to lack of DL ASE.Condition:Incremented by one when admission control fails with reject reason lack of DL ASE.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes 1.5 Iub传输资源拥塞当同一个基站下多用户业务并发时，特别是HSDPA用户较多时，可能产生Iub传输拥塞的情况。由于Iub传输原因造成的拥塞可由以下计算器记录：longnoNotificationnonPersistentreadOnlypmNoRabEstBlockTnCs64 Number of RAB establishment attempts for RAB-type CS64 that are blocked due to TN congestion or TN failure, counted on the blocking cell.Condition:Incremented by one when the establishment of a CS64 RAB fails due to UNI-SAAL or AAl2 congestion, IP resource limitations or blocking as a result of user dimensioned transport network configured capacity. The counter is incremented for the first cell in which the failure occurred but only if the cell is in the SRNC.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes longnoNotificationnonPersistentreadOnlypmNoRabEstBlockTnPsIntHs Number of RAB establishment attempts for RAB-type PS Interactive for HS that are blocked due to TN congestion or TN failure, counted on the blocking cell.Condition:Incremented by one when the establishment of a PS Interactive RAB for HS, fails due to congestion on the user plane (AAL2) or control plane (UniSaal or SCTP) of the transport network layer as a result of user dimensioned transport network capacity.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes longnoNotificationnonPersistentreadOnlypmNoRabEstBlockTnPsIntNonHs Number of RAB establishment attempts for RAB-type PS Interactive that are blocked due to TN congestion or TN failure, counted on the blocking cell.Condition:Incremented by one when the establishment of a PS Interactive RAB, not including PS Interactive for HS, fails due to congestion on the user plane (AAL2) or control plane (UniSaal or SCTP) of the transport network layer as a result of user dimensioned transport network capacity.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes longnoNotificationnonPersistentreadOnlypmNoRabEstBlockTnPsStrHs Number of RAB establishment attempts for RAB-type PS Streaming for HS that are blocked due to TN congestion or TN failure, counted on the blocking cell.Condition:Incremented by one when the establishment of a PS Streaming RAB for HS, fails due to congestion on the user plane (AAL2) or control plane (UniSaal or SCTP) of the transport network layer as a result of user dimensioned transport network capacity.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes longnoNotificationnonPersistentreadOnlypmNoRabEstBlockTnPsStrNonHs Number of RAB establishment attempts for RAB-type PS Streaming that are blocked due to TN congestion or TN failure, counted on the blocking cell.Condition:Incremented by one when the establishment of a PS Streaming RAB, not including PS Streaming for HS, fails due to congestion on the user plane (AAL2) or control plane (UniSaal or SCTP) of the transport network layer as a result of user dimensioned transport network capacity.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes longnoNotificationnonPersistentreadOnlypmNoRabEstBlockTnSpeech Number of RAB establishment attempts for RAB-type Speech that are blocked due to TN congestion or TN failure, counted on the blocking cell.Condition:Incremented by one when the establishment of a Speech RAB fails due to UNI-SAAL or AAl2 congestion, IP resource limitations or blocking as a result of user dimensioned transport network configured capacity. The counter is incremented for the first cell in which the failure occurred but only if the cell is in the SRNC.Counter Type: PEGScanner: Secondary (initial state = Active)Context: SRNC Counter is reset after measurement period: Yes 因此，当出现传输资源拥塞时，为保证业务的服务等级与质量，需要对相关站点的传输进行扩容。指标体现：小区RAB建立拥塞率（Iub资源受限）该指标主要反映了小区发生拥塞时由于Iub资源受限原因所占的比例，计算公式如下：(pmNoRabEstBlockTnSpeech+pmNoRabEstBlockTnCs64+pmNoRabEstBlockTnCs57+pmNoRabEstBlockTn