Question:  Explain Ec/Io and RSCP; on what channel are they measured on?

 

Answer:  Ec/Io = energy of carrier over all noise. RSCP = Receive Signal Code Power. In FDD mode (what we normally deal with) they are measured on the CPICH (pilot). Bonus if they know that Io is the sum of all interference: thermal/bg noise + interferers + own cell and is wideband. Bonus if they understand that RSCP is actually measured AFTER despreading (i.e. narrowband)

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Ans:
Reasons for the HO reversion are 
1) Co-Bsic and BCCH combinations are there in network so this type of problems occurs.
2)May be some issues in Target cells like Path imbalance.
3)Improper HO parameter settings.
4)Wrong Neighbour definition..
5) Interference  on the target cell

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In the middle of the competition between mobile phone manufacturers to bring a wrapped mobile operating system Android, Nokia even cool with new projects that will bring luxury mobile phone design with gold-plated. Heres good news for you fans of luxury. The reason is, Nokia has officially announced a new mobile phone wrapped by a 18-carat gold and is also equipped with all-gold wallpaper.

Although this is not the latest series mobile phones Nokia output, but this is a new version of the Nokia 6700 Classic series. Your Nokia 6700 Classic Gold is also offering the features and specifications are the same as the Nokia 6700 Classic standard version. Only difference is the body design that looks more luxurious and elegant.

Nokia 6700 Classic Gold plan also would adopt a 5MP of camera, GPS with Nokia Maps, FM radio, HSDPA, 8GB microSD memory card and also interesting features such as existing on the Nokia 6700 Classic. But if you buy this gold-plated phone, you will immediately be given a bonus genuine leather gloves to protect the body from all kinds of collisions.

The results of the design of renowned designer Mark Delaney is expected to be landed on the market in the first quarter of 2010 with prices label around 550 dollars. But so far there has been no information on whether the Nokia 6700 Classic Gold will also come to Indonesia.

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Ans:
1. HO COMMAND is received by the MS
2. HO ACCESS is sent to the target cell 
3. but no answer from the target cell.
After a while (timer expiry), the MS will try to go back to previous cell.
If reversion succesful, then there is a ho failure without drop
If reversion failed, then there is a ho failure with drop.

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What is the major difference in link budgets between UMTS and GSM/TDMA?

 

In UMTS you generally have a link budget for each service (voice, data, video etc), in GSM you usually only use 1 for voice. Each service has a different Eb/No target. In UMTS you have to consider the target traffic load you will have and add a noise-rise margin, in GSM you may have a slight interference margin but not normally related to traffic. In UMTS some services (like voice) will show up as uplink limited but other services (like HSDPA, 384kbps service) will show as downlink limited. In UMTS you usually have to consider that all users use the same power from the BTS therefore the more number of users the lower the maximum power available per user (maximum power per connection) which is a starting point in the link budget.

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Features
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WAP 2.0/HTML (NetFront), RSS reader
downloadable games
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Price
Rp. 2,300,000

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Ans:

Training Sequence Code, this optional parameter specifies the Training Sequence Code of the radio channel. The TSC is part of the Normal Bursts which are used for all channel types except RACH,SCH and FCCH. The TSC for the BCCH must correspond to the BCC (part of the BSIC sent on the SCH, so that the MS can derive the TSC of the BCCH from the SCH. This is necessary for the correct selection and decoding of the BCCH bursts, especially if within a limited geographical area a frequency is used several times. If no value is entered for the parameter TSC the BCC is automatically selected.

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This question is a little harder to ask, so you may need to work it differently a few times. Perhaps leading questions could be: What parameter/configuration does the network change on the air interface What you are trying to hear from the candidate is that the network assigns a radio bearer with a channelization code with a spreading factor that matches the requested service maximum bit rate.

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