SCFC‐1 • Pilot – Scrambling code – identify cell as per planned in cell • Cell info Message – broad cast name of area on Cell info Message – broad cast name of area on mobile screen • L‐M Complete‐ Land line to Mobile, to check workability • M‐L – Mobile to Land line, to check workabilityAll these info can be find • M‐M ( TTSL ) complete – TATA Mobile to TATA from stationary test y Mobile , normally TATA 3G to TATA 2G / 3G ( Mobile normally TATA 3G to TATA 2G / 3G ( depends on other phones in which technology ) • M‐M ( Other ) complete ‐ – TATA Mobile to Other Mobile , normally TATA 3G to other 2G / 3G ( Mobile normally TATA 3G to other 2G / 3G ( depends on other phones in which technology )
SCFC‐2 • BLER Block error rate ( describe how good is radio channel quality, BLER Directly BLER – Block error rate ( describe how good is radio channel quality BLER Directly related to voice quality , It should be less as possible < 2 %) • EcNo‐ Energy per Noise ( describe how good is RF signal quality in terms of Interference. EcNo value representation of health of network. It should between – 3 to ‐9 dB in good condition ). If it is poor, it lead to high BLER and Call drop . EcIo may get lower not just due to Ec is poor but also due other neighbour cells are interferecing. are interferecing • RSCP – Recive strength of CPICH‐ Common Pilot channel code power – Every has has Pilot Ch with certain fix power ( typically 2 Watt ( 33 dBm ) ) and due to path loss from Base station to Mobile, signal strength get faded. Ec indicates Chip energy , its obvious , if you are far Ec signal strength low. Desire value better than > ‐90 dBm. If Ec is good it may be EcIo may also good, Which is not completely true. true • RSSI – Receive Signal strength indicator – It is total receive power of 5 MHz channel bandwidth of WCDMA, it should be better than – 90 dBmAll these info can be find • MS Tx Pwr – Mobile Transmit Power ‐ It indicate how much Mobile is transmitting power, Lower transmit power is better for network. MS can transmit from dedicated Driving g between ‐40 to + 21 dBm and Data card ‐40 to +23 dBm. If UP Link has interference MS has to transmit more to reach Node B. Desire value < +10 dBm i f MS h i hN d B D i l 10 dBmode ‐ Moving • Active Set / HO State : In WCDMA if Neighbor cell has better EcIo ( > ‐13 dB ) normally RNC add them in soft HO, so sometime MS is talking to 2 or 3 cells simultaneously. Those ongoing cell will be part of Active sets, from where you can which neighbors are active in soft handover. More in Active sets are not good as 1 user is consuming 3 cells and their resources but it may happen if you do not do Soft handover due to some reasons , it may lead to call drop d f h d d l d ll d • AMR Codec Rates :‐ Voice has various codec ( Analog to digital with some error protection , Voice rate ( User bits+ error protection bits = X kpbs, You can compress voice so you can increase more error protection ). When you are in bad EcIo or poor Ec ( RSCP ) voice data become more compress which may not be good for user perception but you get more space for error protection , AMR is all about saving call depends on RF condition. Normally AMR 12.2 kbps call is very desirable. If other codec ( 7.8 , 5.6 ..are not enable then mostly you will get 12.2 kbps )
SCFC‐3 • Idle Neighbour List ‐ Network sends list of neighbor cells with their Scrambling code to MS in idle mode so MS can reselect best cells to be latch, so MS can listen paging messages if any and other network b l h MS li i if d h k related broad casted parameter which MS require to understand network setting. So based on those all understanding of parameter MS take decision how to react in idle mode and also during initial phase of access. Our objective to note down who are the neighbor h f O bj i d h h i hbAll these info can be find define from OSS and what we can see from system information from idle stationary or during Drive test. Our job to compare what is define in OSS and what we are receiving in field and find out if any discrepancy or dedicated driving modededicated driving mode mismatch. i t h • Handoff Parameter – in 3G, MS is not sending measured neighbor All these info can be find cells detail always, it will only send when it required ? When certain from Driving mode ‐ g criteria fulfill for neighbor compare to serving cell then Mobile send Moving some measurement report to Node B and then Node B will send to RNC and based on Handover parameter setting and algorithm RNC will instruct Node B to inform Mobile to add or remove or replace neighbor cells. Handoff parameters can be seen from system information. Our job to compare what is define in OSS and what we are receiving in field and find out if any discrepancy or mismatch. • HO from 1 to ‐ 2nd or 3rd cell of same site, this test to check intra site Soft handovers are happening or not. • HO from 2 to ‐ 1st or 3rd cell of same site, this test to check intra site Soft handovers are happening or not.
SCFC‐4 • Ho from 3 to – 1st or 2nd cell of same site, this test to check intra site Soft handovers are happening or not. • Soft Ho to other sites – if h i S f H h i if other sites neighbor cells are having better EcIo and they i hb ll h i b E I d h satisfy parameter setting of Handover in that case, mobile send to send 1A event measurement report to RNC via Node B and then we have to add neighbor cell in to soft handover ( in active set ). Addition of neighbor cell only possible if it is define as neighbor in serving cell. If it is define we can see from Idle neighbor cell p g g list or from OSS data base dump. Sometime Neighbor cell might has some hardware or congestion and addition may not be possible, so we need to observe and note it down whether Soft handover with other site’ cell got success or fail. Sometime other site might not radiating so in idle neighbor list all is define but Mobile cannot find it during measurement so it may be reason it was not possible and other far site’s cells are coming and those may not be define as neighbor which results in to poor serving EcIo. results in to poor serving EcIo • Hard HO – normally in WCDMA technology mostly handover are soft handover, but some type of handover like between cell belongs to different RNC or 3G to 2G handover for voice considered as hand handover. We have to check is it happening All these info can be find or not ?from dedicated Driving g • 3G Voice call HO to 2G – if 3G load is high or EcIo or RSCP value is very poor than g ypmode ‐ Moving some threshold value then it may trigger 3G to 2G handover. Means 3G cell has some 2G neighbors also to take care of voice call in case of poor condition. • 3G Data call HO to 2G – if 3G load is high or EcIo or RSCP value is very poor than some threshold value then it may trigger 3G to 2G handover. Means 3G cell has some 2G neighbors also to take care of DATA call in case of poor condition. Normally it called it as 3G to 2G Cell reselection as in Data call ( except 64 kbps Normally it called it as 3G to 2G Cell reselection as in Data call ( except 64 kbps Video Data call ). • 2G Voice Call HO to 3G – 2G cell layer is mostly to take care of voice but if you wish and 2G is loaded more than certain threshold you can shift calls to 3G if 3G cell has good RSCP and EcIo at that location. If such event occurs MS send Measurement p p g report to 2G BSC and then as per neighbor define table BSC talk to RNC and get it g done. If from 2G to 3G neighbor is not define then Mobile doesn’t know about 3G and never scan and measure them and so there is no chance for 2g to 3g handover.
SCFC‐5 • 2G Data call HO to 3G – Normally 3G is good for better data throughput if Mobile is capable for 3G technology. If some how due to any reason mobile is connect to 2G and doing GPRS/EDGE and 3G neighbor defined bl dd / d hb d f d its desirable to switch from 2G to 3G and maximize data through put. There are certain condition where Mobile has to keep checking availability of 3G and if found with certain RSCP and EcIo and if 3G nbr is defined it may select 3G cell. • Ping/Latency Test – when Mobile is in 3G data call, you might has different type of data channel size ( 32/64/128/256/386 kbps its depends on RF condition and Cell loading ). You have to do Ping test to specific IP address with that data channel size. In ping , what we do ? Ping command send certain size of packet from laptop to IP address – g p p p server and server received it and send it back to Laptop. How fast you can get it back from laptop to server to laptop depends on how good is your data channel speed and RF condition. We call it as Round Trip Delay All these info can be find Time ( RTT ). Desired value < 200 ms. Latency means delay, certain from stationary Data call y services like video streaming, cannot be good if delay is more. So each g, g ytesting cell wise services has to fulfill certain QoS ( quality of service parameters ) to satisfy expectation of user experience. • FTP Upload Throughput – FTP ( file transfer protocol ) – When you are on 3G data call, you can send specific size of file ( 1 / 2 MB ) to FTP server, how much time it will take to upload to that ftp server depends server how much time it will take to upload to that ftp server depends on RF condition, Data Channel ( DCH ) size and Network parameters. If you have good throughput, you can upload faster. Throughput depends on you are on Release 99 data call or Release 7(HSPA ) data call. We have see what is configuration of Data channel we are using during such uploading. We to monitor and calculate average thought to upload file. uploading. We to monitor and calculate average thought to upload file. • HTTP Upload Throughput‐ Hyper link transfer protocol – when you access to internet browser and sending email or uploading photo during that time measuring throughput. Throughput depends on as mentioned above point.
SCFC‐6 • FTP Download Throughput – as above like upload, only different to get the file from server to your laptop. different to get the file from server to your laptop • HTTP Download Throughput – as above like upload, only different to download some video or big file or email to your local laptop • SMS outgoing – When you are in 3G, You can send SMS to any phone and check whether this service working or not in each cell • SMS incoming – When you are in 3G, You can receive SMS SMS incoming When you are in 3G You can receive SMS from any phone and check whether this service working or All these info can be find not in each cellfrom stationary Data call • y Video call ( voice CS 64 ) outgoing – Video call in 3G is Circuit g gtesting cell wise switch call like Voice, it takes fix 64 kbps dedicated end to end link. As long as you on video call, occupied channel cannot be share to downgrade. We have to check video calls are working or not when you do outgoing call. are working or not when you do outgoing call. • Video call ( voice CS 64 ) incoming – Video call in 3G is Circuit switch call like Voice, it takes fix 64 kbps dedicated end to end link. As long as you on video call, occupied channel cannot be share to downgrade. We have to check video calls b h d d W h h k id ll are working or not when you get incoming video call.
SCFC‐7 • Media On Demand ( PS64, PS128, PS384 ) – in 3G, specially Release 99 Packet data call has certain type of channel configuration/size. We have to check which channel size we are using whatever we do on such channel. h lAll these info can be find from stationary Data call ytesting cell wise