小区参数简要描述Word下载.docx
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小区参数简要描述Word下载.docx
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rejectingtherequest
3.max_number_of_sdcchs=24小区SDCCH的最大数目。
(>
=themin_number_ofsdcchs)。
取值0to48
如ccch_conf≠1,必须是8的倍数(如:
0,8,16,...48).
如ccch_conf=1,必须是四的倍数(如:
0,4,12,...,44).
3.sdcch_need_low_water_mark=16当空闲的SDCCH数目大于此值时,启动将SDCCH动态配置成TCH,条件是SDCCH的数目必须大于number_sdcchs_preferred
3.sdcch_need_high_water_mark=2当空闲的SDCCH数目小于此值时,启动将TCH动态配置成SDCCH.
3.number_sdcchs_preferred=8小于或等于max_number_of_sdcchs.
同时小于或等于sdcch_need_low_water_mark.
3.tch_full_need_low_water_mark=4SDCCH/TCH动态配置,必须保证的最小TCH数目.
3.cell_bar_access_switch=0小区禁止接入开关,决定是否允许空闲模式下的移动台接入本小区.
0–非禁止接入1-禁止接入
3.cell_bar_access_class=0禁止接入的移动台类别
en_incom_ho=10禁止切换入本小区
1允许切换入本小区
ms_txpwr_max_cch=5在接入小区和收到第一次功率控制命令前,移动台的发射功率取1.ms_txpwr_max_cch.2.移动台的最大发射功率.二者之中的小值.
推荐值:
5(33dbm)
3.report_resource_tch_f_high_water_mark=5
当可用TCH小于该值时,启动内部资源指示计时器,并向MSC发送消息.
<
report_resource_tch_f_low_water_mark
3.report_resource_tch_f_low_water_mark=
当可用TCH大于该值时,内部资源指示计时器停止计时.>
=report_resource_tch_f_high_water_mark
3.report_resource_tch_h_high_water_mark=5N/A
3.report_resource_tch_h_low_water_mark=1N/A
7.dtx_required=00Permitted(MSmayuseDTX)手机连续发射请求
1Required(MSmustuseDTX)
2Disallowed(MSmustnotuseDTX)
attach_detach=1移动台关机后是否存储LAC1-Enable/0-disable。
3.ncc_of_plmn_allowed=80h允许的网络色码
3.max_retran=3移动台发出信道请求的最大重发次数.RACH是一个ALOHA信道,网络允许移动台在收到立即指配消息前,发送多个信道请求,以提高接通率,但同时增加了RACH和SDCCH信道的负荷。
取值范围0-3。
0最大重发次数1
1最大重发次数2
2最大重发次数4
3最大重发次数7
10.radio_link_timeout=4GSM规范定义,移动台中有计时器S(T100),在移动台通话开始时被赋予一个初值,即无线链路超时(radio_link_timeout)。
BCCH上广播。
每当移动台无法正确解码一个SACCH消息(4个SACCHBLOCK)时,S减1。
每当移动台正确解码一个SACCH消息时,S加2。
但S不会超过radio_link_timeout定义的初值。
当S计数为零时,移动台放弃无线资源的连接,进入空闲模式。
发生一次掉话。
取值范围:
0-15(4-64SACCH)
3.tx_integer=12发送分布时隙数。
为克服ALOHA方式的缺点,tx_integer越大,RACH上发生碰撞的概率越小。
但是同时接续时间变长。
取值范围:
0to15(From3to50RACHslotsareusedtospreadthetransmission.)
Waitingperiodforthech.requestrepeatedtransmit,randomvaluein(S,S+1,...S+T-1)
10.reestablish_allowed=0是否允许呼叫重建0=enable
10.cell_reselect_hysteresis=4在不同位置登记区的小区重选滞后(0-14dB)。
值过大,移动台未能及时小区重选,人为造成小区的覆盖过大,移动台的通话干扰大,增加掉话的可能。
过小,则造成在不同位置登记区边界处频繁的位置更新,增加SDCCH的负荷。
3.rxlev_access_min=5移动台接入小区的最小电平值。
建议该值小于15。
电平值范围-110到-47dBm(如:
-105=-110+rxlev_access_min)
=-110+5
=-105dBm
3.emergency_class_switch=00=enableforallclass,1=onlyclass11-15
紧急情况时MS优先级开关。
112,110。
3.immediate_assign_mode=00=assignSDonly,1=assignTCHasSD,foremergency
call。
立即分配模式。
10.handover_power_level=5移动台切换至目标小区的初始发射功率。
范围0to19(43-5dbm)
pwrc=1ThisparameterdetermineswhethertheBroadcastControlChannels(BCCH)measurementwillbeincludedintheaveragedvalueofhoppingfrequencies.
0=includetheBCCHaspartofaveragevalueofhoppingfrequency
6.rr_T3109=12000Thistimerisusedduringthechannelreleaseprocedureincaseofaradiolinktimeout.
Whenthetimerexpires,theCRMwillsendanRFchannelreleasemessagetotheRSS.Therr_t3109parametervaluemustbesettoahighervaluethantheCRMradio_link_timeoutparameter(T100).ThereasonforthisisthatthenetworkshouldholdontoachannelthathaslostradiolinklongenoughfortheMStoreleaseit.ThiswillensurethatthenetworkwillnotputtwoMSsonthesamededicatedchannel.
Itisrecommendedthatthepracticalrangeofvaluesofrr_t3109parameterbelimitedto1.5timesthatoftheradio_link_timeoutparametervalue,thatisfour96-SACCHblocks.Therr_t3109parametervaluemustbegreaterthantherr_t3111parametervalue.
Validrange0to1000000(ms)
Defaultvalue14400
Link_failexceeded,terminatingresourceswhenT3109expired
5.rr_T3111=2000Thistimersetstheamountoftimeallowedtodelaythedeactivationofachannelafterthedisconnectionofthemainsignallinglink.Thepurposeistoallowsometimeforthepossiblerepetitionofthedisconnectionofthemainsignallinglink.ThistimerstartswhenevertheBTSattemptstoconfigureahoppingtimeslot.Thistimerstopswhentheprocedurecompletes.Therr_t3111timerwillcausetheBSStowaitbeforethechannelinquestionisallocatedanotherconnection.Therr_t3111parametervaluemustbesettoavalueequaltothevalueofT3110(atimerintheMSthatishardcodedbytheMSmanufacturer).
Validrange0to1000000msDefaultvalue1500
StartwhenDISCreceiptandreleaseresourcesuntiltimerexpired
1.rr_T3212=20LocationupdateperiodValidrange0to255(6min/step)
Defaultvalue10
dealloc_inact=10000ThisparametersetsthetimerthatgovernsthedeallocationofachannelforwhichafatalerrorindicationhasbeenreceivedfromtheBSS.Thechannelwillbeheldforthetimeselected,incasetheconnectionrecovers.
ho_ack=10000ThisparametersetstheamountoftimethatthesystemwaitsforconfirmationthattheMShasaccessedthe"
handover"
channel.ThetimershouldbesettoallowtheMSenoughtimetogetontoahandoverchannelbeforeclearingtheoriginalchannel.ThisisaMotoroladefinedtimer
0to1000000(ms)
rf_chan_rel_ack=10000ThisparametersetstheamountoftimethatthesystemwaitsforanRFchannelrelease(acknowledgement)messagefromtheRadioSubsystem(RSS).
ThisisaMotoroladefinedtimer.0to1000000(ms)
10.intra_cell_handover_allowed=10=notperformedbyBSS
0--Intra-cellhandoverswillnotbeperformedbytheBSS.ThesecallswillbeincludedastargetcellsinaHandoverRequiredmessagetotheMSC.
1--TheBSSwillperformIntra-cellhandovers.TheMSCwillbenotifiedwithaHandoverPerformedmessage.(由MSC通报)
2--Intra-cellhandoversaredisabledandtheHandoverRequiredmessageisnotsenttotheMSC.
10.inter_cell_handover_allowed=11=performedbyBSS,2=notpermitted
0--OutgoinginternalandexternalhandoverswillnotbeperformedbytheBSS.TheHandoverRequiredmessage,includinginternalandexternalcandidates,issenttotheMSC.
IntercellhandoversarecontrolledbytheMSC.(由MSC控制)
1--Outgoinginternalandexternalhandoversareenabled.TheMSCwillbenotifiedwithaHandoverPerformedmessageuponcompletionofaninternalhandover.
IntercellhandoversarecontrolledbytheBSC.
2--Outgoinginternalintercellhandoversaredisabled.TheHandoverRequiredmessageisnotsenttotheMSCifaninternalintercellhandoverisrequired.
3--OutgoinginternalandexternalintercellhandoversaredisabledandtheHandoverRequiredmessageisnotsenttotheMSC.
10.number_of_preferred_cells=6ThisparametersetsthemaximumnumberoftargetcellstobeincludedinaHandoverRequiredmessage.ThepreferredlistoftargetcellsisamandatoryBSSfield.Thenumberofpreferredcellsisgiveninorderofpredictedbestperformance.Validrange1to16
handover_required_reject_switch=1SendthehorejectmessagefromMSCtoBSS
ThisparameterdisablesorenablesthedeliveryofahandoverrequiredrejectmessagefromtheMSCtothesourceBSSintheeventthatatargetcannotbefoundforarequestedhandover.ThisparameteronlyappliestotheBSC(location=0).
Ifthehandover_required_reject_switchisenabled(setto"
1"
),theBSSexpectstoreceivea"
handoverrequiredreject"
messagefromtheswitch.Anyinternalcallsthatarecandidatesforthehandoverwillnotbeincludedinthe"
HandoverRequired"
message.Onreceiptofthe"
HandoverRequiredReject"
messagetheBSSwillperformaninternalhandoveriftherearevalidcandidates.
Ifthehandover_required_reject_switchisdisabled(setto"
0"
),theBSSwillnotexpecttoreceivea"
messagefromtheswitchandwillincludeinternalcandidatesinthe"
HoRequired"
message
10.rr_T3103=4100ThisparametersetsthetimethattheBSSwaitsforaninternalhandovertocomplete.ThepurposeistokeeptheoldchannelslongenoughfortheMStoretaintheabilitytoreturntotheoldchannelswhennecessary,andtoreleasethechannelsifthecallisdropped.
Therr_t3103waitperiodmusthavealongerdurationthanthecombinedtimesittakesforahandovercommandtobesent,plusthemaximumtimeittakestoattempttoestablishadatalinkwithamultiframemode.
Validrange0to1000000msDefaultvalue5000ms
Timeusedtosetupacallinanewch.duringho,otherwisehofailurereceiptwhentimerexpired
4.rr_T3101=2000ThisparametersetsthetimethattheBSSwaitsfortheMobileStation(MS)toestablishonaStandaloneDedicatedControlChannel(SDCCH)aftersendinganimmediateassignmentmessage.
Validrange0to1000000msDefaultvalue5000(add_celldefault)
Signallingestablishmenttimer
decision_alg_num=0Thisparameterspecifiesthecurrentpowercontrolalgorithm
Validrange0to31
0--powercontrolalgorithmnumber1
1--powercontrolalgorithmnumber2(enablestheuseofp_con_acktimers)
2to31--reservedforfutureuse
decision_1_dl_rxlev_av_h=0Thisparameterspecifiesthebinnumbercontainingthemeasurementaveragingalgorithmdatausedtomakethehan
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