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Datang 8142 Instructions for use

2018-03-19 16:00:33

In the test, this interface mainly looks at the frequency of the service cell, scramble code, signal strength, and whether the adjacent area is missing. During the test, the interface mainly looks at the location area LAC, routing area RAC, and cell ID CELLID of the service cell occupied by the service cell (CELLID displayed in the medium is a long code, but displayed in the work parameter is a short code, and the relationship between the two is cell number (long code) =RNCID*65536+CI(short code)). On this interface, you can see: T3212: Periodic update timer T3212 for the CS domain. There are two main reasons for location update in the system. One is that the mobile station finds that its location area has changed (LAC is different), and the other is that the network requires the mobile station to update its location periodically. The frequency of periodic position update is controlled by the network, and the period length is controlled by the parameter T3212. If the setting is too small, a large number of location update messages will be generated, occupying the network. Note that the parameter Settings for RNC are smaller than those for CN. ATT: indicates that ATT is represented by 1 bit. 0 indicates that the mobile station is not allowed to start the IMSI binding and separation process; 1 indicates that the mobile station must enable the combination and separation process. Note that ATT is generally set to 1 and must be set identically within the same location area. NMO:NMO(Network Mode Operation) Now we roughly know that it can be divided into three modes, e8l mode 1, is the process of the call can continue to GPRS connection, not affected by each other; 4P mode 2, during the call, GPRS is temporarily interrupted, but the call is over, GPRS can be immediately restored; Mode 3, call and GPRS can only exist one, that is, during the call, GPRS connection is not allowed; Or when you receive a call in the process of GPRS Internet access, you must disconnect the GPRS connection before you can connect. In all modes, the priority of the call is the highest. DRXCoef: indicates the paging period length coefficient. This parameter is used to calculate the DRX period length of the CS or PS domain for UE in IDLE state. UE in idle mode, CELL_PCH, and URA_PCH uses DRX to save power. In other words, UE does not listen all the time. For a UE, the interval between each moment is fixed, called the DRX cycle length, in frames. UE In idle mode, this value directly determines how often the UE listens for a call. In connection mode, UE uses the CN domain DRXcyclelencoef and the UTRAN domain DRXcyclelencoef, which are the smallest. A larger value indicates a longer DRX cycle period. As a result, when the UE is called, the connection time is too long. The setting is too small, wasting UE battery. CellBar: This parameter is delivered in the SIB3 information. Check whether the value of Cell barred is not barred. The cell state consists of the cell deny access indicator, the access level deny indicator configured in the background, and the cell retain extension indicator. The cell can be accessed only when all three indicators are not prohibited. Otherwise, the cell cannot be accessed. Cell denial indication is a parameter that can be set by the network operator. Usually all the cell allows mobile station access. In special cases (such as when a cell is only used for switching or debugging), it can be set to the disable state. When the value is set to Disable, common UE cannot access the community. When the test has the forced access function, you can debug the community without affecting other common users. If there is no special requirement, set this parameter to not disable. Sintra: This parameter is the trigger threshold for the neighboring cell reselection measurement at the same frequency of the PCCPCH main carrier frequency, corresponding to "TDD-Sintrasearch" in SIB3/4. The use of this parameter is as follows: when Srxlev <= TDD-Sintrasearch, UE performs in-frequency measurement. Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation In this command, Qrxlevmeas: indicates the measurement value of the receiving level of the service cell under test. Qrxlevmin: is the minimum receiving level value in the cell, that is, "the minimum PCCPCH RSCP of the available cell"; Pcompensation: The value is max(ue_TXPWR_MAX_Rach-p_max, 0), which is the power compensation value. It is used for whether the UE expected by the base station can meet the UE maximum transmit power value of RACH. If the value is positive, It reflects a controllable redundancy value of whether UE forward access and reverse receive control can achieve balance. If the value is negative, it indicates that the maximum UE power required by the base station on RACH cannot be supported by the maximum UE transmit power, and the compensation value is 0. We always pick 0. Sinter: Trigger threshold for different frequency cell gravity selection measurement. The method used is the same as Sintra. Tresel: Delay of the cell reselect algorithm. Qhysts: Hysteresis in cell reselect algorithm. Sinterrat: The threshold for reselection measurement in a different system. As shown in Figure Figure, Sinterrat is 11. Then the threshold for reselection measurement in a different system is 11 minus the minimum PCCPCH RSCP value of the available cell. RSSI: refers to the sum of signal power in the current frequency, falling within the band width (currently 1.6M), including useful signals, interference signals and background noise. Pathloss: Unit DB, signal Pathloss = terminal received frequency a base station transmission power, from here we can know the transmission power of the base station. Figure: -61 DBM - 97db=-36 DBMSRxLEV: S criterion for cell selection. S>0 From here we can know what the "minimum available cell PCCPCH RSCP" value is set in the background. Srxlev = Qrxlevmeas - Qrxlevmin - Pcompensation In this command, Qrxlevmeas: indicates the measurement value of the receiving level of the service cell under test. Qrxlevmin: is the minimum receiving level value in the cell, that is, "the minimum PCCPCH RSCP of the available cell"; Pcompensation: The value is max(ue_TXPWR_MAX_Rach-p_max, 0), which is the power compensation value. It is used for whether the UE expected by the base station can meet the UE maximum transmit power value of RACH. If the value is positive, It reflects a controllable redundancy value of whether UE forward access and reverse receive control can achieve balance. If the value is negative, it indicates that the maximum UE power required by the base station on RACH cannot be supported by the maximum UE transmit power, and the compensation value is 0. We always pick 0. Rs: R value of the service cell Rs/Rn (dBm) Cell reselect decision criterion parameter RS>RN)RS= received signal power + reselect hysteresis (6DB)RN= received signal strength - cell individual offset (0DB)TA:chip is the unit, or the value /8 displayed on the software is the number of chips between the terminal and the base station. Each chip is 0.7825us, so the actual delay between the base station and the base station is (display value N/8) *0.7825us, UETP: transmitted power SIR: Signal to Interference Ratio is defined as (RSCP/Interference) x SF. SIR (dB) = RSCP (dBm) -ISCP (dBm) + 10log (SF). If the UE occupies multiple downlink time slots, the SIR Of the first time slot is given here. C/I stands for adjacent frequency interference is the ratio of the useful signal power received by the same equipment to the interference signal power. That is, PCCPCHC/I = PCCPCH RSCP(dB) -ISCP [0] where ISCP is the interference signal power, the interference in the received signal measured on midamble within a specific time slot. The C/I value is the difference between RSCP and ISCP. TgSIR: target SNR. TS-ISCP: interfered signal power of each time slot. D-RSCP: dedicated channel power Rn: R-value of adjacent cell Rs/Rn (dBm) Cell reselect decision criterion parameter RS>RN)RS= received signal power + reselect hysteresis (6DB)RN= received signal strength - cell individual offset (0DB) BSIC: Scrambled code in GSM network This value is a decimal number, but in Dingli software is displayed as an octal value. So the software is different from what it shows.

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