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1、第三層(Layer3)信令第三層信令是看網(wǎng)絡(luò)運(yùn)行情況的信息層,從第三層可以看到網(wǎng)絡(luò)的個(gè)利「動(dòng)作:如:呼叫流程、擁塞、用戶(hù)忙、位置更新等,系統(tǒng)信息總共冇8個(gè)類(lèi)型,Type1-4只出現(xiàn)在待機(jī)狀態(tài)卜Type5—8只出現(xiàn)在通話(huà)狀態(tài)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小區(qū)廣播信息,有該小區(qū)自身的頻點(diǎn),RACH的一些參數(shù)設(shè)置,祥見(jiàn)上圖。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待機(jī)模式下小區(qū)的測(cè)雖頻點(diǎn),(同頻段,移動(dòng)網(wǎng)冇兩個(gè)頻段,GSM900和DCS1800),在通話(huà)模式下有另外定義的測(cè)量頻點(diǎn),也就是說(shuō)一個(gè)小區(qū)可以在待機(jī)吋做測(cè)量頻點(diǎn),而通話(huà)時(shí)不做測(cè)量頻點(diǎn),允許小區(qū)重選而不允許切換,反之也可以只允許切換不允許小區(qū)重選也可以,不過(guò)通常情況卜-待機(jī)和通話(huà)時(shí)的測(cè)量頻點(diǎn)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待機(jī)模式下小區(qū)的測(cè)雖頻點(diǎn),(異頻段,移動(dòng)網(wǎng)冇兩個(gè)頻段,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