TEMS PARAMETERS

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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
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.
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.

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  • Time is Almighty
  • TEMS PARAMETERS

    1. 1. TEMS PARAMETERS(Speech)Nirav TrivediRF EngineerADA Cellworks, AhmedabadADACELLWORKS PRESENTATION
    2. 2.  On completion of the module one should be clear about theparameters required during drive test what does it mean andhow much it is important. Parameters regarding in windows like : a) Current Channelb) Radio parametersc) Serving + NeighborsModule ObjectivesModule Objectives2Time is Almighty
    3. 3. Current Channel Definitions:1. Time: It is system time of computer.2. Cell name: It displays the name ofthe sector which is serving accordingto the cellfile that is loaded in TEMS.3. CGI : It stands for the Cell GlobalIdentity which is unique for everysector of the site. It consists ofMCC,MNC,LAC,CI.MCC: Mobile Country Code 0 – 999(e.g. 404 in India), MNC: MobileNetwork Code 0 – 99 (e.g. 98 forAirtel in Gujarat) LAC : LocationArea Code 0 -65535 (e.g. 5101 inGujarat) CI: Cell Identity 0 – 65535(e.g. 11001)3Time is Almighty
    4. 4. Current Channel• Cell GPRS Support: Tells sector ishaving GPRS or not. Values are Yes or No.• Band : It tells in which Freq. Band mobileis operating e.g. GSM 900/ 1800.• BCCH ARFCN: It tells by which BCCHis the mobile station getting served.• TCH ARFCN: On which Traffic Freq. callis going on.• BSIC (Base Station Identity Code) : It iscombination of Network Color Code(NCC) (0 – 7) & Base Station Color Code(BCC) (0 – 7). e.g. 62. It is decoded bymobile on every Sync. Channel Message.• Mode: It is shows in which state is mobileoperating, Idle, Dedicated & Packet.• Time slot: On which time slot of currentTCH call is going on. Viz. time slot no. ofTRX.4Time is Almighty
    5. 5. Current Channel• Channel Type: Type of channel mobile isgetting now. Like BCCH / SDCCH/8 +SACCH/C8 or CBCH / TCH/F+FACCH/F +SACCH/F.• Channel Mode : Shows mode of codinglike Speech Full Rate of Half Rate.• Speech Codec: It shows FR for Full Rate,HR for Half Rate & EFR for EnhancedFull Rate.• Ciphering Algorithm : It shows cipheringalgorithm used by the system to protectdata for privacy. E.g. Cipher by A5/2.• Sub Channel Number: It is displayed ata time when mobile is on dedicated modeat time of call setup when it is gettingSDCCH at that time it shows whichSDCCH it is getting out of 8 available.E.g. 2.5Time is Almighty
    6. 6. Current Channel• Hopping Channel : It shows that currentsector is having hopping feature or not.Values are Yes or No.• Hopping Frequencies : It displays no. offreq. 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 whichfreq. from given MA list for sectorhopping has to be started. E.g. 0 meanssector will start from first freq. to hop.• Hopping Sequence Number (HSN) :Indicates sequence in which frequenciesare allowed to hop from the MA List. 0-63. 0 for Cyclic Hopping, 1 – 63 randomhopping sequences.6Time is Almighty
    7. 7. Intentionally Blank7Time is Almighty
    8. 8. Radio Parameters• RxLev : Receiving level in terms of dBmthat mobile is receiving from the site.Range of -30 dBm to -110dBm.• RxQual : Quality of voice which ismeasured on basis of BER. Range ofRxQual 0 -7.• FER : Frame Erasure Rate it represents thepercentage of frames being dropped due tohigh number of non-corrected bit errors inthe frame. It is indication of voice qualityin network.• BER Actual : Ratio of the number of biterrors to the total number of bitstransmitted in a given time interval. BERis a measure for the voice quality innetwork.. Depending on BER RxQual ismeasured. E,g, BER 0 to 0.2 %corresponds to RxQual 0. Max. BERcountable and useful is up to 12.8 % whichcorresponds to RxQual of max. 7.8Time is Almighty
    9. 9. Radio Parameters• SQI : SQI is a more sophisticated measurewhich is dedicated to reflecting the qualityof the speech (as opposed to radioenvironment conditions). This means thatwhen optimizing the speech quality inyour network, SQI is the best criterion touse. SQI is updated at 0.5 s intervals. It iscomputed on basis of BER and FER. ForEFR 30, FR – 21 & HR – 17 arerespectively ideal values.• C/I : The carrier-over-interference ratio isthe ratio between the signal strength of thecurrent serving cell and the signal strengthof undesired (interfering) signalcomponents. It should be atleast > 9 .• MS Power Control Level : Displaysrange of power control from 0 to 8depending upon network design. E.g. 0means no power control and 1 means levelthat is defined by operator viz. 2 dBm lessacc. To airtel.9Time is Almighty
    10. 10. Radio Parameters• DTX : Discontinuous transmission (DTX)is a mechanism allowing the radiotransmitter to be switched off duringspeech pauses. This feature reduces thepower consumption of the transmitter,which is important for MSs, and decreasesthe overall interference level on the radiochannels affecting the capacity of thenetwork..• TA : Value that the base station calculatesfrom access bursts and sends to the mobilestation (MS) enabling the MS to advancethe timing of its transmissions to the BS soas to compensate for propagation delay.Value of 0 means MS in radius of 550mt.From BS.10Time is Almighty
    11. 11. Radio Parameters• RL Timeout Counter (Cur) : Thisparameter define the maximum value ofthe radio link counter expressed inSACCH blocks. Range of 4 – 64 in stepsize of 4. it shows current value of RLT.Decrease by 1 but increase by 2. When itreaches zero it results in normal DROPCall.• RL Timeout Counter (MAX) : Thisparameter define the maximum value ofthe radio link counter expressed inSACCH blocks. Range of 4 – 64 in stepsize of 4. it shows current value of RLT.Normally 16, 20, 24.• MS Behavior Modified : This windowshows current settings for the mobilestation, for instance whether handover isdisabled or multiband reporting enabled.11Time is Almighty
    12. 12. Intentionally Blank12Time is Almighty
    13. 13. Serving + Neighbor 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 modeof 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.13Time is Almighty
    14. 14. Example14Time is Almighty
    15. 15. Example showing everywindow15Time is Almighty

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