Gsm Chennel

Lecture # 01
Logical guide


Logical channel is consists of two channels.
ballpark epithelial duct.
Dedicated passageway.

Common channel is also consists of two channels.
BCH ( vent highway )
CCCH ( Common Control Channel )

Broadcast Channel ( BCH )

1- Frequency Correction Channel ( FCH ):


This is a flag you involve like a tag which help to enable MS ( MS means Mobile) to find the TRX from number of TRXs.


2- Synchronization Channel ( SCH ):


It reduce the BSIC & TDMA frame.

3- Broadcast Control Channel ( BCCH ):

It has complete discipline of Network and Cell such as :


a)Frequencies.
b)Frequency Hopping Sequence.
c)Channel Combination.
d)Paging Group.
e)Info. of neighbors cell.
f)Careful frequency fancy needed to make BCCH TRX clean.


Common Control Channel ( CCCH )


1-Paging Channel ( PCH ):


This is Broadcast Channel and it imbue to MS until the call terminate.
It broadcast to all BTS which has different Location ( LA ).
Basic knowledge, it has the breeding of Particular MS or User.

3- Random Access Channel ( RACH ):

It initiate the transaction of MS and respond to PCH.





4- Access assign Channel ( AGCH ):

It answer to RACH and use SDCCH.


Dedicated Channel ( DCH )


in that location are four employ channels.

SDCCH
SACCH
FACCH
TCH

SDCCH ( Stand alone dedicated channel ):

1-System Signaling
2-Call Setup
3-Authentication
4-Location Update
5-Assigned the TCH
6-Transmission of short messages ( SMS )

SACCH ( Slow associated visualise channel ):

1-Send bill report from MS to RBS or BTS
2-Power Control
3-Time Alignment, short messages SMS

FACCH ( Fast associated control channel ):

1-when need the handover then it create the map for handover purpose.

TCH ( handicraft channel ):

1- Full Rate or Half Rate
2- TCH is employ for...If you want to get a full essay, order it on our website: Ordercustompaper.com



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