中级培训第二模块之二参数课件.ppt
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1、中中级级培培训训第第二二模模块块之之二二参参 数数课程时间课程时间l08:15开始l12:45结束l15:00开始l17:30结束l约二天时间。CHANNEL CONFIGURATIONSContents Time Slots Burst2 Signaling Channels1 TDMA frame TCH/F,TACH SDCCH/8,SDCCH/4,CBCH(2nd phase GSM)BCCH/CCCH3 Traffic Channels 4 Parameters Logical ChannelsCHANNEL CONFIGURATIONSTime Slots and Frames01
2、2242501249 5007Hyperframe=2048 SuperframesSuperframe=26x51 or 51x26 Multiframes26 Multiframe=120 ms51 Multiframe=235 msTDMA frame=4.615 msTCHSIGN.CHANNEL CONFIGURATIONSBurst Period07TDMA frame=4.615 ms=BURST PERIOD000fsCHANNEL CONFIGURATIONSLogical Channels,Downlink BSS-MSBCHCCCHFCCHSCHBCCHPCHAGCHDC
3、CHTCHSDCCHSACCHFACCHTCHTCHCOMMON CHANNELSDEDICATED CHANNELSCHANNEL CONFIGURATIONSLogical Channels,Uplink MS-BSSCCCHRACHDCCHTCHSDCCHSACCHFACCHTCHTCHCOMMON CHANNELSDEDICATED CHANNELSlFCCHFCCH频率校正信道:给提供一个标志,使它们在若干之间发现包含广播传输的,频率校正信道:给提供一个标志,使它们在若干之间发现包含广播传输的,移动台开机后,搜寻这个信号移动台开机后,搜寻这个信号lSCHSCH同步信道同步信道:包含基
4、站识别码包含基站识别码BSICBSIC和简化的和简化的TDMATDMA帧号帧号.BSIC.BSIC用于识别不同的小区用于识别不同的小区,TDMA,TDMA帧号用于话帧号用于话间加密间加密.lBCCHBCCH广播控制信道广播控制信道:包含了详细的网络和小区信息包含了详细的网络和小区信息,如如:服务区和邻小区的频率服务区和邻小区的频率.跳频序列跳频序列,信道信道组合方式组合方式,COMBINE,COMBINE 等等;寻呼组寻呼组,通常一个小区有多个寻呼信道通常一个小区有多个寻呼信道,为了防止移动台为了一个寻呼消为了防止移动台为了一个寻呼消息而侦听所有的寻呼信道息而侦听所有的寻呼信道,寻呼信道以只有
5、某一组移动台侦听某一特定的寻呼信道的方式分开寻呼信道以只有某一组移动台侦听某一特定的寻呼信道的方式分开;邻邻小区信息小区信息,MS,MS必须知道目前小区的邻区是什么必须知道目前小区的邻区是什么,以及它们广播频率以及它们广播频率.lPCHPCH寻呼信道寻呼信道:下行下行,寻呼用户时用寻呼用户时用,它是由位置区的所有它是由位置区的所有BTSBTS广播的广播的.lRACHRACH随机接入信道随机接入信道:CCCH:CCCH中唯一的上行链路中唯一的上行链路.用于用于MSMS启动一事务启动一事务,主叫主叫,或作为或作为PCHPCH的应答的应答.lAGCHAGCH准许接入信道准许接入信道;为为MSMS指派
6、一个指派一个SDCCH,SDCCH,是下行的是下行的.lSDCCHSDCCH独立专用控制信道独立专用控制信道,用于呼叫建立用于呼叫建立,鉴权鉴权,位置更新位置更新,TCH,TCH分配分配,短消息短消息.lSACCHSACCH慢随路控制信道慢随路控制信道:SACCH:SACCH伴随着伴随着SDCCHSDCCH和和TCH,TCH,用于发送测量报告用于发送测量报告,功率控制功率控制,时间校准时间校准,MS,MS通话通话时发送短信时发送短信.lFACCHFACCH快随路控制信道快随路控制信道:用于切换时用于切换时,它与一个它与一个TCHTCH对应对应,代替代替20MS20MS的话间的话间,工作于偷帧模
7、式工作于偷帧模式.lTCHTCH业务信道业务信道:传送话音与数据传送话音与数据,TCHF,TCHF是全速是全速13.3Kbit/s,TCHH13.3Kbit/s,TCHH是半速率是半速率5.6,EFR5.6,EFR增加型全速增加型全速率率,13.3,13.3,但编码方式与全速率不同但编码方式与全速率不同,在话音质量上有更一步提高在话音质量上有更一步提高.CHANNEL CONFIGURATIONSConfiguration of Signalling Channels07Separated ConfigurationCombined Configuration07ts0=bcch/pch/ag
8、ch ts1=sdcch/8ts0=bcch/sdcch/4/pch/agchCHANNEL CONFIGURATIONS Combined CCCH/SDCCH/4 Multiframef sbbb bcfcfcs c c c cccc c fcfs t t t tttt t ff t t t tttt t fsf s s s ssss sst tttr r sfssss s s r rrrr r rsfr r r r rrrr r rf r r r rtrt t trf t t t rtrt ttDownlinkUplinkCHANNELS f=FCCH b=BCCH r=RACH i=i
9、dle s=SCH/SACCH c=CCCH t=SDCCH/451 TDMA frames=235 mst0501.2.3.4.if sbbbb cfcfcs c c c cccc c fcfs c c c cccc c ff c c c cccc c fsf c c c cccc csr rrrr r rfrrrr r r r rrrr r rrfr r r r rrrr r rf r r r rrrr r rrf r r r rrrrrrDownlinkUplinkCHANNELS f=FCCH b=BCCHr=RACH i=idle s=SCH c=CCCH=PCH/AGCH51 TD
10、MA frames=235 msr050CHANNEL CONFIGURATIONSBCCH/CCCH MultiframeiCHANNEL CONFIGURATIONS SDCCH/8 Multiframet tttt t tftttt t t t tttt t ttft t t t tttt t tf s s s ssss s sf s s s s sss ssss s sfsssstttt t tsft t t t tttt t tf t t t tttt t ttf t t t tttt ttDownlinkUplinkCHANNELS t=SDCCH/8 s=SACCH/8i=idl
11、ett51 TDMA frames=235 mss1.2.3.5.6.7.8.4.050iiiiiiCHANNEL CONFIGURATION Number of Blocks for AGCH onlyf sbbbb cfcfcs c c c cccc c fcfs c c c cccc c ff c c c cccc c fsf c c c cccc csBCCH/CCCHCHANNELS f=FCCH b=BCCHt=SDCCH/4i=idle s=SCH/SACCH c=CCCH=PCH/AGCH51 TDMA frames=235 msf sbbbb cfcfcs c c c ccc
12、c c fcfs t t t tttt t ff t t t tttt t fsf s s s ssss ss123456789123BCCH/SDCCH/4iiCHANNEL CONFIGURATIONS Full Rate Traffic Channel(TCH)Multiframet tttt t tftttttttt t ttft t t ttDownlink and UplinkCHANNELS t=TCH s=SACCH i=idle ts26 TDMA frames=120 ms025iCHANNEL CONFIGURATIONS Half Rate Traffic Channe
13、l(TCH)MultiframeDownlink and UplinkCHANNELS t=TCH s=SACCH i=idle 26 TDMA frames=120 ms025Downlink and UplinkCHANNELS t=TCH s=SACCH i=idle 26 TDMA frames=120 ms025t tttt t ttttttttt t ttttt tttt tttt t ttttttttt t ttttt tttstitCHANNEL CONFIGURATIONSSDCCH Capacity Location updates Short Message Servic
14、e imsi attached/detached Call setupSDCCH used inCHANNEL CONFIGURATIONSSDCCH Capacity(a)lExample(Call establishment and Location Update included)Call Establishment2 TRXs/Cell 8,11 Erl/Cell(1%Blocking probability)1,5 min/Subs/BH=25 mErl./Subs8,11 Erl/Cell/25 mErl./Subs=325 Subs/CellAuthentication and
15、Ciphering=7 sec=1,94 mErl/Call(SDCCH reservation time)=325 Calls/Cell*1,94 mErl/Call=0,6305 Erl/Cell(SDCCH)Location UpdateLocation Updates once in 60 minutes(parameter timerPeriodicUpdateMS)325 Subs/CellSDCCH reservation time for Location Update=7 sec=1,94 mErl=325 Calls/Cell*1,94 mErl/Call=0,6305 E
16、rl/Cell(SDCCH)lCall Establishment and Location Update together 0,632 Erl+0,632 Erl=1,261 Erl/CellWith 1%Blocking Probability(Erlang B table)=5 SDCCH/CelllCombined BCCH/SDCCH channel structure is not possible in this case!lSeparate Configuration(1 BCCH/CCCH and 1 SDCCH/8)is needed!Chs1%2%3%5%Chs1%2%3
17、%5%10.010.020.030.052112.8014.0014.9016.2020.150.220.280.382213.7014.9015.8017.1030.460.600.720.902314.5015.8016.7018.1040.871.091.261.522415.3016.6017.6019.0051.361.661.882.222516.1017.5018.5020.0061.912.282.542.962617.0018.4019.4020.9072.502.943.253.752717.8019.3020.3021.9083.133.633.994.542818.60
18、20.2021.2022.9093.784.344.755.372919.5021.0022.1023.80104.465.085.536.223020.3021.9023.1024.80115.165.846.337.083121.2022.8024.0025.80125.886.617.147.953222.0023.7024.9026.70136.617.407.978.833322.9024.6025.8027.70147.358.208.809.733423.8025.5026.8028.70158.119.019.6510.603524.6026.4027.7029.70168.8
19、89.8310.5011.503625.5027.3028.6030.70179.6510.7011.4012.503726.4028.3029.6031.601810.4011.5012.2013.403827.3029.2030.5032.601911.2012.3013.1014.303928.1030.1031.5033.602012.0013.2014.0015.204029.0031.0032.4034.60CHANNEL CONFIGURATIONSErlang B TableCHANNEL CONFIGURATIONSSDCCH Capacity(b)lExample(Call
20、 establishment and Location Update included)Call Establishment2 TRXs/Cell 8,11 Erl/Cell(1%Blocking probability)1,5 min/Subs/BH=25 mErl./Subs8,11 Erl/Cell/25 mErl./Subs=325 Subs/CellAuthentication and Ciphering=7 sec=1,94 mErl/Call(SDCCH reservation time)=325 Calls/Cell*1,94 mErl/Call=0,6305 Erl/Cell
21、(SDCCH)Location UpdateLocation Updates once in 120 minutes(parameter timerPeriodicUpdateMS)325 Subs/CellSDCCH reservation time for Location Update=7 sec=1,94 mErl=325 Calls/Cell*1,94 mErl/Call*1/2=0,31525 Erl/Cell(SDCCH)lCall Establishment and Location Update together 0,6305 Erl/Cell+0,31525 Erl/Cel
22、l=0,94575 Erl/Cell(SDCCH)With 1%Blocking Probability(Erlang B table)=4 SDCCH/CelllCombined BCCH/SDCCH channel structure is possible in this case!CHANNEL CONFIGURATIONSSDCCH Capacity(c)lExample(Call establishment and Location Update included)Call Establishment2 TRXs/Cell 8,11 Erl/Cell(1%Blocking prob
23、ability)1,5 min/Subs/BH=25 mErl./Subs8,11 Erl/Cell/25 mErl./Subs=325 Subs/CellAuthentication and Ciphering=7 sec=1,94 mErl/Call(SDCCH reservation time)=325 Calls/Cell*1,94 mErl/Call=0,6305 Erl/Cell(SDCCH)Location UpdateLocation Updates once in 120 minutes(parameter timerPeriodicUpdateMS)325 Subs/Cel
24、lSDCCH reservation time for Location Update=7 sec=1,94 mErl=325 Calls/Cell*1,94 mErl/Call*1/2=0,31525 Erl/Cell(SDCCH)SMSSMS traffic estimation 1.0 mErl/subscriber=325 Calls/Cell*1 mErl/Call=0,325 Erl/Cell(SDCCH)lCall Establishment,Location Update and SMS together 0,6305 Erl/Cell+0,31525 Erl/Cell+0,3
25、25 Erl/Call=1,27075Erl/Cell(SDCCH)With 1%Blocking Probability(Erlang B table)=5 SDCCH/CelllSeparated channel structure is possible in this caseCHANNEL CONFIGURATIONSPaging CapacitylExampleCombined BCCH/SDCCH ConfigurationOne Block Reserved for AGCH=2 Blocks for PCHPaged Mobile Stations per Paging_Re
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