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ID:43721791
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页数:13页
时间:2019-10-13
《【精品】层三信令分析》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、第三层(Layer3)信令第三层信令是看网络运行情况的信息层,从第三层可以看到网络的个利「动作:如:呼叫流程、拥塞、用户忙、位置更新等,系统信息总共冇8个类型,Type1-4只出现在待机状态卜Type5—8只出现在通话状态21、SystemInformationType1■essa.geDetailsa「MSISystemInformationType1Time:18:25:49.36Latitude:N2312.3120Longitude:E11315.4710Speed:0.000000Framenumber:178304Readf
2、rom(ARFCN):86L2PseudoLength:21CellchanneldescriptionCellAllocationFormatnotation:Bitmap0ARFCN:192858748695RACHcontrolparametersMaxretransmissions:1Tx-integer:12Cellbaraccess:NotbarredCallreestablishment〔RE〕:NotallowedEmergencycall(EC)allowed:AllMSNotbarredclass(es)(ACC):
3、01234567891112131415SI1RestOctetscontainssparebitsMessagedump:0056550619000000004020020002000000080400002500002b小区广播信息,有该小区自身的频点,RACH的一些参数设置,祥见上图。2、SystemInformationType2■essageDetailsMS1SystemInformationType2Time:14:08:32.60Latitude:N2312.3860Longitude:E11315.2610Speed:
4、0.000000Framenumber:1913987Readfrom(ARFCN):79L2PseudoLength:22NeighborcellsdescriptionBA-IND:1EXT-IND:0BCCHAllocationFormatncitation:Bitmap0ARFCN:24812147184869092NCCpermitted:252(AllowedNCC=251)RACHcontrolparametersMaxretransmissicm:2Tx-integer:12Cellbaraccess:Notbarred
5、Callreestablishment(RE):NotallowedEmergencycall(EC)allowed:AllMSNotbarredclass(es)(ACC):01234567891112131415待机模式下小区的测虽频点,(同频段,移动网冇两个频段,GSM900和DCS1800),在通话模式下有另外定义的测量频点,也就是说一个小区可以在待机吋做测量频点,而通话时不做测量频点,允许小区重选而不允许切换,反之也可以只允许切换不允许小区重选也可以,不过通常情况卜-待机和通话时的测量频点是一致的。3、SystemInform
6、ationType2terlessageDetails回MSIaSystemInformationType2terTime:14:08:31.65Latitude:N2312.3860Longitude:E11315.2610Speed:0.000000Framenumber:1913783Readfrom(ARFCN):79再L2PseudoLength:0Neighborcellsdescription2Multibandreporting:3BA-IND:1BCCHAllocationFormatnotation:Variable
7、bitmapARFCN:514539545552554556SI2lerRestOctetscontainssparebits待机模式下小区的测虽频点,(异频段,移动网冇两个频段,GSM900和DCS1800),4、SystemInformationType3■essageDetailsMS1SystemInformationType3Time:14:08:31.89Latitude:N2312.3860Longitude:E11315.2610Speed:0.000000Framenumber:1913834Readfrom(ARFC
8、N):79L2PseudoLength:18CellIdentity:33281(8201hex)LocationareaidentificationMobilecountrycode(MCC):460Mo
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