Single Cell functional test (SCFT) involves testing various aspects of a cell's functionality including pilot scrambling codes, cell broadcast messages, call connectivity to landlines and mobiles on the same and other networks, radio channel quality metrics like BLER, EcNo, RSCP, signal strength, transmit power, soft handover states, codec rates, neighbor cell lists, handoff parameters, and handoffs within and between sites for voice and data calls. Key metrics like BLER, EcNo, RSCP, codec rates, number of active sets, transmit power, and latency are monitored to evaluate radio channel quality and cell performance.

1. Single Cell functional test
( SCFT )

3. 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
workabilityworkability
• M‐L – Mobile to Land line, to check workability
• M‐M ( TTSL ) complete – TATA Mobile to TATA
Mobile normally TATA 3G to TATA 2G / 3G (
All these info can be find
from stationary test
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 (
y
Mobile , normally TATA 3G to other 2G / 3G (
depends on other phones in which technology )

4. SCFC‐2
• BLER – Block error rate ( describe how good is radio channel quality BLER DirectlyBLER 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 interferecingare 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
truetrue.
• RSSI – Receive Signal strength indicator – It is total receive power of 5 MHz
channel bandwidth of WCDMA, it should be better than – 90 dBm
• MS Tx Pwr – Mobile Transmit Power ‐ It indicate how much Mobile is
transmitting power, Lower transmit power is better for network. MS can transmit
between ‐40 to + 21 dBm and Data card ‐40 to +23 dBm. If UP Link has
i f MS h i h N d B D i l 10 dB
All these info can be find
from dedicated Driving
interference MS has to transmit more to reach Node B. Desire value < +10 dBm
• 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
d f h d d l d ll d
g
mode ‐ Moving
do Soft handover due to some reasons , it may lead to call drop
• 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 )

5. 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
b l h MS li i if d h kbe latch, so MS can listen paging messages if any and other network
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
h f O bj i d h h i hbphase of access. Our objective to note down who are the neighbor
define from OSS and what we can see from system information
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
i t h
All these info can be find
from idle stationary or
dedicated driving mode mismatch.
• Handoff Parameter – in 3G, MS is not sending measured neighbor
cells detail always, it will only send when it required ? When certain
criteria fulfill for neighbor compare to serving cell then Mobile send
All these info can be find
from Driving mode ‐
dedicated driving mode
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
g
Moving
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.

6. 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.
S f H h i if h i i hb ll h i b E I d h• Soft Ho to other sites – if other sites neighbor cells are having better EcIo and they
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
list or from OSS data base dump. Sometime Neighbor cell might has some p g g
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 EcIoresults 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
or not ?
• 3G Voice call HO to 2G – if 3G load is high or EcIo or RSCP value is very poor than
All these info can be find
from dedicated Driving g y p
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
g
mode ‐ Moving
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
report to 2G BSC and then as per neighbor define table BSC talk to RNC and get it p p g 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.

7. 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
b l d d / d hb d f dmobile is connect to 2G and doing GPRS/EDGE and 3G neighbor defined
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
Time ( RTT ). Desired value < 200 ms. Latency means delay, certain
services like video streaming, cannot be good if delay is more. So each
All these info can be find
from stationary Data call g, g y
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
y
testing cell wise
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.

8. SCFC‐6
• FTP Download Throughput – as above like upload, only
different to get the file from server to your laptopdifferent 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
not in each cell
• Video call ( voice CS 64 ) outgoing – Video call in 3G is Circuit
All these info can be find
from stationary Data call g g
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.
y
testing cell wise
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
b h d d W h h k id llcannot be share to downgrade. We have to check video calls
are working or not when you get incoming video call.

9. 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
h lchannel.
All these info can be find
from stationary Data call y
testing cell wise