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1.1常用无线参数介绍 GSM网络中的无线参数是指与无线设备和无线资源有关的参数,这些参数对网络中 小区的覆盖、信令流量的分布、网络的业务性能等具有至关重要的影响,因此合理调整 无线参数是GSM网络优化的重要组成部分。 本章对网络优化过程中常用的一部分参数进行简单介绍。 1.1.1参数体系及参数查看 根据每个参数的控制范围,可以将参数分为BSC参数、BCF参数、BTS参数、TRX 参数、切换(HOC)参数以及功控(POC)参数。 BSC级参数 控制整个BSC,在该BSC下有效。 可使用MML命令ZEEO:ALL;来查看该BSC下所有BSC级的参数。 <ZEEO:ALL; BSC3iLYBSC442011-09-1717:19:05 BASESTATIONCONTROLLERDATA NUMBEROFPREFERREDCELLS........................(NPC)....3 GSMMACROCELLTHRESHOLD..........................(GMAC)...35dBm GSMMICROCELLTHRESHOLD..........................(GMIC)...33dBm DCSMACROCELLTHRESHOLD..........................(DMAC)...26dBm DCSMICROCELLTHRESHOLD..........................(DMIC)...24dBm MSDISTANCEBEHAVIOUR............................(DISB)...255 (NORELEASE,ONLYHANDOVERATTEMPTS) EMERGENCYCALLONFACCH..........................(EEF)....N ANSWERTOPAGINGCALLONFACCH...................(EPF)....N ORDINARYCALLSONFACCH..........................(EOF)....N RE-ESTABLISHMENTONFACCH........................(ERF)....Y TCHINHANDOVER..................................(HRI)....5 (TCHHASTOBEALLOCATEDPRIMARILYFROMTHEBESTBTS) LOWERLIMITFORFRTCHRESOURCES.................(HRL)....40% UPPERLIMITFORFRTCHRESOURCES.................(HRU)....60% FREETSLFORCSDOWNGRADE........................(CSD)....95% FREETSLFORCSUPGRADE..........................(CSU)....4s TRHOGUARDTIME..................................(TGT)....30s PRIORITYHOINTERFERENCEDL......................(HDL)....INTER PRIORITYHOINTERFERENCEUL......................(HUL)....INTER LOADRATEFORCHANNELSEARCH.....................(CLR)....100% TRIGGERINGTHRESHOLDFORSERVICEAREAPENALTY....(TTSAP)..127 PENALTYTRIGGERMEASUREMENTPERIOD...............(PTMP)...128s SERVICEAREAPENALTYTIME........................(SAPT)...127s CSTCHALLOCATERTSL0............................(CTR)....N CSTCHALLOCATIONCALCULATION....................(CTC)....2 CBDRXSCHEDULEPERIOD...........................(SCHP)...32 MINIMUMMEANHOLDINGTIMEFORTCHS...............(MINHTT).4s MAXIMUMMEANHOLDINGTIMEFORTCHS.....