Answer Posted / dhaval
when we dial a number and press send/call key the RACH ask
for a signalling channel,using AGCH.
after this process some steps are taken that is:
1) The MSC receives the message of a call request
2) The MSC from VLR checks if the mobile station is
authorized to access the network.if so,the mobile station
is activated.if the mobiloe station is not
authorized ,service wiil be denied.
3)The MSC from VLR analyzes the number and intiate a call
setup with the PSTN.
4)MSC asks the corresponding BSC to allocate a traffic
channel(a radio ch. and a time slot)
5)The BSC alloctes the traffic channeland passes the
information to the mobile station & BTS.The MS and BTS tune
to that channel
6)The MSC forward the call called number to the local
exchange in the PSTN,vis GMSC which is establishs a
connection to the subscriber.
7)The called party answer vis GMSC & MSC to MS the call and
the conversation takes place.
8)The mobile station keeps on taking measurment of a radio
channels in the present cell and neighboring cells and
passes the information to the BSC.
and the BSC decides if handover is required , if so , a new
traffic channel is allocated to the mobile station and the
handover is performed. if handover is not required,the
mobile stations continues to transmit in the same frequency.
| Is This Answer Correct ? | 7 Yes | 3 No |
Post New Answer View All Answers
I CLEARED THE MTNL WRITTEN EXAM, CAN U PLEASE POST THE INTERVIEW QUESTIONS...... I AM FROM ELECTRONICS AND COMMUNICATION BACK GROUND AND THE TYPE OF INTERVIEW? and give the reply to sridhert@rediffmail.com
how can i prepare for the apgenco can u send old qps to jeedipally@gmail.com
Define dynamic resistance of a p-n junction diode in forward biased condition.
in govt polytechnic lecturers tell me what is the expected cut off for ece after the interview list announced
What is dma controller?
Define cmrr of an opamp?
Explain what is a voltage follower?
What is a rectifier?
Explain what kind of negative feedback is present in a noninverting op-amp.
how a dpad circuit works
why dont call datareader is backward
Explain why is the diffusion technique of formation of resistor most widely used?
How many types of Transmission cards are in Ultra BTS?
What is the work of BOIA, TRx, BB2F, Duplexer, Combiner, Multi-coupler, RRI.
Please send me the sample pattern for the Electronics and communication for the post in RRB s&T to my Email ID : sivamec6034@gmail.com
