欢迎来到天天文库
浏览记录
ID:61482747
大小:13.33 KB
页数:5页
时间:2021-02-04
《GPRS主要参数列表.docx》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、GPRS主要无线参数介绍.1参数定义1.1资源类Ater_Usage_Threshold定义:Threshold(percentageofusedAternibbles,inaGPU)abovewhichtheAterusageissaid"high".GPU的Ater口高负荷门限。取值范围:1%-100%默认值:70%影响范围:BSC备注:WhentheAterusageis“high”,theGCH_RED_FACTOR_High_Ater_Usageisapplied,whereaswhentheAterusageis
2、“normal”(i.e.percentageofusedAternibblesisbelowthethreshold),noGCHreductionfactorisapplied.若Aterusage为high,则P383b开始计数。GCH_RED_FACTOR_High_Ater_Usage定义:ReductionfactorofthenumberofGCHstargetedperPDCH,whentheAterusageis“high”.取值范围:0.1-1默认值:0.75影响范围:CELLGPRS_MULTISLOT
3、_CLASS_DEF_VALUE定义:Defaultvalueofthe(E)GPRSmultislotclassassumedatTBFestablishmentwhentheactualMS(E)GPRSmultislotclassisunknown.取值范围:1:GPRSmultislotclass1(1+1MS);2:GPRSmultislotclass2(2+1MS);4:GPRSmultislotclass4(3+1MS);8:GPRSmultislotclass8(4+1MS)默认值:8优化值:1影响范围:BS
4、C备注:在建立one-phaseULTBF时,MFS会激活(E)GPRS的资源预留算法,即为DLTBF预留资源,预留的资源大小由GPRS_MULTISLOT_CLASS_DEF_VALUE决定。若该值为8(4+1),即使仅需要1个DL时隙(GMM/SM信令业务),但是系统会建立4个DLPDCH,且每个PDCH对应n个GCH(由TRXClassn决定)。故在Ater资源拥塞的情况下,该参数可设置为1,即为1+1MS,可避免在传输GMM/SM信令数据业务时浪费资源;而在进行大数据量传输时,可通过T3资源重分配算法使GCH占用最大
5、资源。这种设置对数据吞吐量可能有影响,因为在数据传输开始时,没有占用到最大的时隙。T_GCH_INACTIVITY定义:-ForEvoliumBTS:Timertopostponethereleaseofthe"unused"GCHsoftheM-EGCHlinkofaTRX(theconditionforsomeGCHsoftheM-EGCHlinkofaTRXtobecome"unused"isthatsomeTBFsestablishedonthatTRXwerereleased).-ForNonEvoliumBTS:
6、TimertopostponethereleaseofoneslavePDCH,whenitdoesnotsupportany(E)GPRStraffic.取值范围:1-100s步长:1s默认值:3s影响范围:BSCT_GCH_INACTIVITY_LAST定义:-EvoliumBTS:TimertopostponethereleaseofthelastN_GCH_FAST_PS_ACCESS(DLS)GCHsestablishedinacell,whenthelastTBFhasbeenreleasedinthecell.
7、Thereisnomore(E)GPRStrafficinthecell,butkeepingsomeGCHsestablishedwillbeusefulincaseof(E)GPRStrafficresumptioninthecell(e.g.WAP,WEB).-NonEvoliumBTS:TimertopostponethereleaseofthelastestablishedslavePDCHofacell,whenitdoesnotsupportGPRStrafficanymore.ThereisnomoreGPR
8、Strafficinthecell,butkeepingaPDCHestablishedwillbeusefulincaseofGPRStrafficresumptioninthecell.规则:仅当EN_FAST_INITIAL_GPRS_ACCESS=disable时有效取值范围:1-
此文档下载收益归作者所有