GPRS Qos说明.doc

QOS1. R97/R98 QoSR97/R98 QoS（3个字节），包括下列参数：Precedence class:优先级Delay class：延迟等级Reliability class：可靠性Peak throughput class：峰值吞吐量Mean throughput class：平均吞吐量2. R99 QoSR99 QoS(11个字节)，保留了原来的3个字节，增加了8个字节，新增如下参数：Traffic Class:业务类型Delivery order:传输顺序Delivery of erroneous SDU:是否传输错误SDUMaximum SDU size: 最大SDU 尺寸Maximum bit rate for uplink :上行最大比特率Maximum bit rate for downlink :下行最大比特率Residual BER:剩余SDU 错误率SDU Error ratio:SDU 错误率Transfer delay: 传输时延Transfer handling priority:传输处理优先级Guaranteed bit rate for unlink:保证的上行最大比特率。Guaranteed bit rate for downlink:保证的下行最大比特率3. R5/R6 QoSR5/R6 QoS(14个字节)，除了原来11个字节后，又增加了3个字节，新增如下参数：Signalling IndicationSource Statistics DescriptorMaximum bit rate for downlink (extended)Guaranteed bit rate for downlink (extended)4. QoS字段结构QoS IE 结构（information elementcoded）87654321Quality of service IEIoctet 1Length of quality of service IEOctet 200spareDelayclassReliabilityclassoctet 3Peak throughput0sparePrecedenceclassoctet 4000spareMeanthroughputoctet 5Traffic ClassDelivery orderDelivery of erroneous SDUOctet 6Maximum SDU sizeOctet 7Maximum bit rate for uplinkOctet 8Maximum bit rate for downlinkOctet 9Residual BERSDU error ratioOctet 10Transfer delayTraffic Handling priorityOctet 11Guaranteed bit rate for uplinkOctet 12Guaranteed bit rate for downlinkOctet 13000spareSignal-ling Indicat-ionSource Statistics DescriptorOctet 14Maximum bit rate for downlink (extended)Octet 15Guaranteed bit rate for downlink (extended)Octet 16Figure 10.5.138/3GPP TS 24.008: Quality of service information element5. Allocation/Retention Priority在Gb/Iu信令中，qos的字节长度如上，但在Gn的信令中，qos中会自动增加1个字节：Allocation/Retention priority。Allocation/Retention PriorityDefinition: specifies the relative importance compared to other UMTS bearers for allocation and retention of the UMTS bearer. The Allocation/Retention Priority attribute is a subscription attribute which is not negotiated from the mobile terminal.NOTE 4:The addition of a user-controlled Allocation/Retention Priority attribute is for further study in future releases.Purpose: Priority is used for differentiating between bearers when performing allocation and retention of a bearer. In situations where resources are scarce, the relevant network elements can use the Allocation/Retention Priority to prioritize bearers with a high Allocation/Retention Priority over bearers with a low Allocation/Retention Priority when performing admission control.6. QOS的取值6.1 Precedence ClassPrecedence Class: defines the relative importance of maintaining the service under abnormal conditions (e.g., congestion). Three precedence classes are defined: High priority, Normal priority and low priority. The possible precedence classes are given in the following table:PrecedencePrecedence NameInterpretation1(001)High priorityService commitments shall be maintained ahead of precedence classes 2 and 3.2(010)Normal priorityService commitments shall be maintained ahead of precedence class 3.3(011)Low priorityService commitments shall be maintained after precedence classes 1 and 2.Table 1. Precedence classes6.2 Delay ClassDelay Class: defines the MS to fixed station (PDN) or fixed station to MS transfer delay. More specifically it is the total delay measured between the R or S and the Gi reference points (see figure 1). Four delay classes are introduced. Delay classes 1 to 3 prescribe a mean transfer delay (in seconds) and the 95 percentile delay (in seconds) between the above reference points (class 1 being the more stringent in terms of value). Delay class 4 is a best effort class where the GPRS network gives no guarantee regarding the delay incurred by user packets associated with the PDP context. The possible delay classes are given in the following table:Delay (maximum values)SDU size: 128 octetsSDU size: 1024 octetsDelay ClassMean Transfer Delay (sec)95 percentileDelay (sec)Mean TransferDelay (sec)95 percentileDelay (sec)1. (Predictive)001 0.5 1.5 2 72. (Predictive)010 5 25 15 753. (Predictive)011 50 250 75R99：Table 6: Rules for determining R99 attributes from R97/98 attributesResulting R99 AttributeDerived from R97/98 AttributeNameValueValueNameTraffic classInteractive1, 2, 3Delay classBackground4Traffic handling priority11Delay class2233SDU error ratio10-61, 2Reliability class10-4310-34, 5Residual bit error ratio10-51, 2, 3, 4Reliability class4*10-35Delivery of erroneous SDUsno1, 2, 3, 4Reliability classyes 5Maximum bitrate kbps81Peak throughput class1623236441285256651271024820489Allocation/Retention priority11Precedence class2233Delivery orderyesyesReordering Required (Information in the SGSN and the GGSN PDP Contexts)nonoMaximum SDU size1 500 octets(Fixed value)R99=R97/R98：Table 7: Rules for determining R97/98 attributes from R99 attributesResulting R97/98 AttributeDerived from R99 AttributeNameValueValueNameDelay class1conversationalTraffic class1streamingTraffic class1InteractiveTraffic class1Traffic handling priority2InteractiveTraffic class2Traffic handling priority3InteractiveTraffic class3Traffic handling priority4BackgroundTraffic classReliability class2= 10-5SDU error ratio310-5 x 5*10-4SDU error ratio 5*10-4SDU error ratio 2*10-4Residual bit error ratioPeak throughput class 1 16Maximum bitrate kbps216 = x 32332 = x 64464 = x 1285128 = x 256256 = x 5127512 = x 102481024 = x = 2048Precedence class11Allocation/retention priority2233Mean throughput classAlways set to 31-Reordering Required (Information in the SGSN and the GGSN PDP Contexts)yesyesDelivery ordernono9.2 西门子HLR的qos设置西门子关于QOS的定义如下：PRECEDPRECEDENCECLASSThisparameterspecifiestheprecedenceclassoftheservice.Thisparameteronlyacceptsasinglevalueentry.HIGHHIGHPRECEDENCENORMALNORMALPRECEDENCELOWLOWPRECEDENCEDELAYDELAYThisparameterspecifiesthedelayclassoftheservice.Thisparameteronlyacceptsasinglevalueentry.LOWLOWDELAYNORMALNORMALDELAYHIGHHIGHDELAYBESTEFRTBESTEFFORTRELIABRELIABILITYCLASSThisparameterspecifiesthereliabilityclassoftheservice.Thisparameteronlyacceptsasinglevalueentry.RCL1RELIABILITYCLASS1Nonreal-timetraffic,errorsensitiveapplicationthatcannotcopewithdatalossRCL2RELIABILITYCLASS2Nonreal-timetraffic,errorsensitiveapplicationthatcancopewithinfrequentdatalossRCL3RELIABILITYCLASS3Nonreal-timetraffic,errorsensitiveapplicationthatcancopewithdatalossRCL4RELIABILITYCLASS4Real-timetraffic,errorsensitiveapplicationthatcancopewithdatalossRCL5RELIABILITYCLASS5Real-timetraffic,errornon-sensitiveapplicationthatcancopewithdatalossPTHRPUTPEAKTHROUGHPUTCLASSThisparameterspecifiesthepeakthroughputclassoftheservice.Thisparameteronlyacceptsasinglevalueentry.P8K8kbit/sP16K16kbit/sP32K32kbit/sP64K64kbit/sP128K128kbit/sP256K256kbit/sP512K512kbit/sP1024K1024kbit/sP2048K2048kbit/sMTHRPUTMEANTHROUGHPUTCLASSThisparameterspecifiesthemeanthroughputclassoftheservice.Thisparameteronlyacceptsasinglevalueentry.BESTEFRTBESTEFFORTM020.22bit/sM040.44bit/sM11.11bit/sM22.2bit/sM44.4bit/sM1111bit/sM2222bit/sM4444bit/sM111111bit/sM222222bit/sM444444bit/sM1K1kbit/sM2K2kbit/sM4K4kbit/sM11K11kbit/sM22K22kbit/sM44K44kbit/sM111K111kbit/s460010508984458的Delay class为NORMAL,关于您提到的Traffic class我感觉好像应该为西门子定义的RELIABILITYCLASS，如果是的话西门子定义为RCL1,9.3 华为HLR的qos设置参数ID参数名称参数含义目前配置RELCLS可靠性级别可靠性级别。可靠性级别指明一个应用需要的传输特性。可靠性级别定义了SDUs丢失、重复、错序或发生不可检测的错误的可能性。可靠性级别分为5个级别。ACKALLPRODT：Acknowledged GTP, LLC, and RLC; Protected data，即公认的GTP（GPRS隧道协议）、LLC和RLC，受保护的数据。ACKLLCRLCPRODT ：Unacknowledged GTP; Acknowledged LLC and RLC, Protected data，即非公认的GTP，公认的LLC和RLC，受保护的数据。ACKRLCPRODT ：Unacknowledged GTP and LLC; Acknowledged RLC, Protected data，即非公认的GTP和 LLC，公认的RLC，受保护的数据。UACKALLPRODT ：Unacknowledged GTP, LLC, and RLC, Protected data，即非公认的GTP（GPRS隧道协议）、LLC和RLC，受保护的数据。UACKALLUPRODT-：Unacknowledged GTP, LLC, and RLC, Unprotected data，即非公认的GTP（GPRS隧道协议）、LLC和RLC，不受保护的数据。建议设置为ACKRLCPRODT。ACKALLPRODTDELAYCLS延迟级别Delay Class，延迟级别。表明在GPRS网络中传输SDUs时的端到端的时延的级别。延迟级别分为四级，级别越高，延迟时间越长。DELAY1 ：延迟级别1DELAY2 ：延迟级别2DELAY3 ：延迟级别3DELAY4 ：延迟级别4建议设置为DELAY4。DELAY4PRECLS优先级别Precedence Class，优先级别，必选参数。此参数指明继续GPRS业务时相关的优先级。例如：当发生异常（如网络拥塞）时，优先级低的包将首先被丢弃。HIGH ： 高优先级NORMAL：普通优先级LOW ：低优先级建议设置为LOW。NORMALPEAKTHR峰值吞吐量峰值吞吐量，描述单位时间内传递的数据位的最大值（单位：Octet/s）。1000 OCT 、2000 OCT、4000 OCT 、8000 OCT 、16000 OCT、32000 OCT 、64000 OCT 、128000 OCT 、256000 OCT 建议设置为2000 OCT。256000MEANTHR平均吞吐量平均吞吐量（单位：octet/h），取值范围为：100 OCT、200 OCT、500 OCT、1000 OCT、2000 OCT5000 OCT、.、10000000 OCT、20000000 OCT、50000000 OCT、BEST_EFFORT建议设置为BEST_EFFORT。100000009.4 Alcatel HLR的设置Open GUI = ngHLR management = Subscription =shareProfile = MS_OAM_Shared_SubscriptionGPRS在Pdp Characheristics页不检查：在QoS and EQos页请检查QoS部分是否符合下面设置：PrecedenceClass =highDelayClass =DEL1ReliabilityClass =REL3PeakThroughput =PEAK9MeanThroughput =MEAN319.5 Nokia HLR的设置 CLASS.TRAFFIC CLASS . B ORDER.DELIVERY ORDER . Y DELERR.DELIVERY OF ERRONEOUS SDU . N SDUMAX.MAXIMUM SDU SIZE . 1500 DWNMAX.MAXIMUM BIT RATE FOR DOWNLINK . 2048 UPMAX.MAXIMUM BIT RATE FOR UPLINK . 2048 BER.RESIDUAL BER . 7 SDUERR.SDU ERROR RATIO . 7 DELAY.TRANSFER DELAY . UPBR.GUARANTEED BIT RATE FOR UPLINK . DWNBR.GUARANTEED BIT RATE FOR DOWNLINK . PRIOR.TRAFFIC HANDLING PRIORITY .10. SGSN中遇到的Qos问题10.1 对traffic class 的检查问题当HLR签约的traffic class是background，而手机请求PDP激活时所用的qos为conversational，SGSN以requested service option not subscribed的case拒绝，因为conversional的等级要高于background。为了适应类似情况，SGSN开发了一个feature，可以控制是否对traffic class进行检查。为true时，不激活SGSN中的traffic class签约检查功能。10.2 R5/R6 QOS的PDP激活失败问题Nokia95手机发的qos为14字节，SGSN拒绝该手机的PDP激活请求，认为消息格式不对。SGSN开发功能，支持了此类R5/R6的手机激活请求。10.3 qos对GPRS速度的影响主要是2个参数，1个是Reliabili