1. TEMS Parameter

2. Module Objectives On completion of the module one should be clear about the parameters required during drive test what does it mean and how much it is important. Parameters regarding in windows like : a) Current Channel b) Radio parameters c) Serving + Neighbors

5. Example

6. Current Channel  Definitions: Time: It is system time of computer. Cell name: It displays the name of the sector which is serving according to the cellfile that is loaded in TEMS. CGI : It stands for the Cell Global Identity which is unique for every sector of the site. It consists of MCC,MNC,LAC,CI. MCC: Mobile Country Code 0 – 999 (e.g. 404), MNC: Mobile Network Code 0 – 99 (e.g. 98) LAC : Location Area Code 0 -65535 (e.g. 5101) CI: Cell Identity 0 – 65535 (e.g. 11001)

7.  Cell GPRS Support: Tells sector is having GPRS or not. Values are Yes or No.  Band : It tells in which Freq. Band mobile is operating e.g. GSM 900/ 1800.  BCCH ARFCN: It tells by which BCCH is the mobile station getting served.  TCH ARFCN: On which Traffic Freq. call is going on.  BSIC (Base Station Identity Code) : It is combination of Network Color Code (NCC) (0 – 7) & Base Station Color Code (BCC) (0 – 7). e.g. 62. It is decoded by mobile on every Sync. Channel Message.  Mode: It is shows in which state is mobile operating, Idle, Dedicated & Packet.  Time slot: On which time slot of current TCH call is going on. Viz. time slot no. of TRX. Current Channel

8.  Channel Type: Type of channel mobile is getting now. Like BCCH / SDCCH/8 + SACCH/C8 or CBCH / TCH/F +FACCH/F +SACCH/F.  Channel Mode : Shows mode of coding like Speech Full Rate of Half Rate.  Speech Codec: It shows FR for Full Rate, HR for Half Rate & EFR for Enhanced Full Rate.  Ciphering Algorithm : It shows ciphering algorithm used by the system to protect data for privacy. E.g. Cipher by A5/2.  Sub Channel Number: It is displayed at a time when mobile is on dedicated mode at time of call setup when it is getting SDCCH at that time it shows which SDCCH it is getting out of 8 available. E.g. 2. Current Channel

9.  Hopping Channel : It shows that current sector is having hopping feature or not. Values are Yes or No.  Hopping Frequencies : It displays no. of freq. on which mobile is allowed to hop. viz. MA List for hopping of that sector.  Mobile Allocation Index Offset (MAIO): It is the number which tells from which freq. from given MA list for sector hopping has to be started. E.g. 0 means sector will start from first freq. to hop.  Hopping Sequence Number (HSN) : Indicates sequence in which frequencies are allowed to hop from the MA List. 0- 63. 0 for Cyclic Hopping, 1 – 63 random hopping sequences. Current Channel

10. Absolute radio-frequency channel number (ARFCN) is a code that specifies a pair of physical radio carriers and channels used for transmission and reception on the Um interface, one for the uplink signal and one for the downlink signal. P – GSM 900: For uplink :(890 – 915)MHz & For Downlink: (935-960)MHz P – GSM 900: For uplink :(880 – 890)MHz & For Downlink: (925-935)MHz P – GSM 1800: For uplink :(1710 – 1785)MHz & For Downlink: (1805-18800)MHz Carrier Spacing : 200 KHz or 0.2 MHz Bandwidth : 45 MHz ARFCN to Frequency Calculation: For P GSM 900: ARFCN Range: 1≤ n ≤ 124 Uplink: 890 + 0.2 x n Downlink: Calculated Uplink Frequency + 45. For E GSM 900: ARFCN Range: 1≤ n ≤ 124 or 975 ≤ n ≤ 1023 Uplink: 890 + 0.2 x n or 890 + 0.2 x (n-1024) Downlink: Calculated Uplink Frequency + 45. For GSM 1800: ARFCN Range: 512≤ n ≤ 885 Uplink: 1710.2 + 0.2 x (n-512) Downlink: Calculated Uplink Frequency + 95.

11.  RxLev : Receiving level in terms of dBm that mobile is receiving from the site. Range of -30 dBm to - 110dBm.  RxQual : Quality of voice which is measured on basis of BER. Range of RxQual 0 -7.  FER : Frame Erasure Rate it represents the percentage of frames being dropped due to high number of non-corrected bit errors in the frame. It is indication of voice quality in network.  BER Actual : Ratio of the number of bit errors to the total number of bits transmitted in a given time interval Radio Parameter

12. SQI : SQI is a more sophisticated measure which is dedicated to reflecting the quality of the speech (as opposed to radio environment conditions). SQI is updated at 0.5 s intervals. Values greater than 22 is good.  C/I : The carrier-over-interference ratio is the ratio between the signal strength of the current serving cell and the signal strength of undesired (interfering) signal components. It should be at least > 9.  MS Power Control Level : Displays range of power control from 0 to 8 depending upon network design. Radio Parameter

13. DTX : Discontinuous transmission (DTX) is a mechanism allowing the radio transmitter to be switched off during speech pauses. This feature reduces the power consumption of the transmitter, which is important for MSs, and decreases the overall interference level on the radio channels affecting the capacity of the network. 0 means DTX is off. Value other than 0 means DTX is on. TA Timing Advance, this value give us information about distance between MS to BTS. TA = 1 means the distance between MS to BTS approx 550meter, TA=2 mean 1.1meters. TA usually used to analyze the overshoot cell. If there are TA value > 10 mean the distance between MS to BTS more than 5.5 Kilometers. There could be overshoot cells. Radio Parameter

15.  Cell Name : Name that describes the neighboring cell as per the cellfile.  ARFCN : Channel number mobile receives as neighbor.  BSIC : BSIC of the neighboring cell.  RxLev : Receiving Level in dBm of neighboring cell.  C1 & C2 : These are the cell path loss criterion and cell reselection criteria. Valid during idle mode of mobile station.  C31 & C32 : GPRS signal strength threshold criterion C31 and GPRS cell ranking criterion C32. Valid both in packet idle and packet dedicated mode. Serving + Neighbors

16. Thank You…