文档介绍：NSN日常优化参数设置规范
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。
第一节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;
LOADING PROGRAM VERSION -0
DX 200 NYBSC1 2006-03-10 09:21:31
BASE STATION CONTROLLER DATA
BACKGROUND DATA STATE .............................. NEW
NUMBER OF PREFERRED CELLS ........................(NPC).... 3
GSM MACROCELL THRESHOLD ..........................(GMAC)... 33 dBm
GSM MICROCELL THRESHOLD ..........................(GMIC)... 33 dBm
DCS MACROCELL THRESHOLD ..........................(DMAC)... 30 dBm
DCS MICROCELL THRESHOLD ..........................(DMIC)... 30 dBm
MS DISTANCE BEHAVIOUR ............................(DISB)... 255
(NO RELEASE, ONLY HANDOVER ATTEMPTS)
EMERGENCY CALL ON H ..........................(EEF).... N
ANSWER TO PAGING CALL ON H ...................(EPF).... N
ORDINARY CALLS ON H ..........................(EOF).... N
RE-ESTABLISHMENT ON H ........................(ERF).... N
TCH IN HANDOVER ..................................(HRI).... 5
(TCH HAS TO BE ALLOCATED PRIMARILY FROM THE BEST BTS)
LOWER LIMIT FOR FR TCH RESOURCES .................(HRL).... 20 %
UPPER LIMIT FOR FR TCH RESOURCES .................(HRU).... 40 %
BSC CALL NUMBER ..................................(BCN).... 0000
FREE TSL FOR CS DOWNGRADE ........................(CSD).... 95 %
FREE TSL FOR CS UPGRADE ..........................(CSU).... 4 s
TRHO GUARD TIME ..................................(TGT).... 30 s
PRIORITY HO INTERFERENCE DL ......................(HDL).... INTER
PRIORITY HO INTERFERENCE UL ......................(HUL).... INTER
LOAD RATE FOR CHANNEL SEARCH .....................(CLR).... 100 %
MINIMUM MEAN HOLDING TIME FOR TCHS ...............(MINHTT). 5 s
MAXIMUM MEAN HOLDING TIME FOR TCHS ...............(MAXHTT). 120 min
MAXIMUM MEAN HOLDING T