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www.arcx.com/sites/CDMAvsTDMA.htm

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Posted by crouse

www.freepatentsonline.com/7397773.html

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Posted by crouse

www.tek.com/ir/whitepaper/WP_CDMA.pdf

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Posted by saqlain231

Um
abis
a3/a7
a1/a2
a8/a9
a10/a11

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Posted by crouse

there are the type
Um interface between MS and BTS
Abis interface between BTS and BSC
A3/A7 between BSC's
A1/A2 between BSC and MSC
A8/A9 between BSC and PCF
A10/A11 between PCF and PDSN

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Posted by waqasahmad

MOBILE TO LAND SEQUENCE:

1.)The subscriber pressing the send key initiates a Channel Request message from
the MS to the BSS. This is followed by the assignment of a dedicated control channel
by the BSS and the establishment of the signalling link between the MS and BSS
(SABM-Set Asynchronous Balanced Mode).

2.)The message Request for Service is passed to the MSC which relays it to the VLR.
The VLR will carry out the authentication process if the MS has been previously
registered on this VLR - if not, the VLR will have to obtain authentication parameters
from HLR. The diagram assumes the MS was previously registered on this VLR.

3.)Subscriber authentication (optional) takes place using authentication messages and
encryption algorithms and, if successful the C all setup can continue. If ciphering is to
be used this is initiated at this time as the setup message contains sensitive
information.

4.)The message "Set Up" is sent by the MS to the MSC accompanied by the call
information (type of call, and number being called etc.). The message is forwarded
from the MSC to the VLR.

5.)The MSC may initiate the MS IMEI check (is the MS stolen? etc). Note that this check
may occur later in the message sequence.

6.)In response to the message ``Set Up" (sent at step 4), the VLR sends the message
"Complete Call" to the MSC , which notifies the MS with "Call Proceeding".

7.)The MSC then assigns a traffic channel to the BS S ("Assignment Command"), which
in turn assigns an air interface traffic channel. The MS responds to the BS S (which
responds in turn to the MSC ) with "Assignment Complete".

8.)An "Initial and Final Address Message (IFAM)" is sent to the PSTN. Ring tone is applied
at the MS in response to ``Alerting", which the MSC sends to the MS when the PSTN
responds with an ``Address C omplete Message (ACM)".

9.)When answered ("Answer (ANS)" from the PSTN), the message "Connect" is
forwarded to the MS by the MSC , stopping the MS ring tone. The MSC then connects
the GSM traffic channel to the PSTN circuit, thus completing the end to end traffic
connection.

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Posted by jahangir1983

MOBILE TO LAND SEQUENCE:

1.)The subscriber pressing the send key initiates a Channel Request message from
the MS to the BSS. This is followed by the assignment of a dedicated control channel
by the BSS and the establishment of the signalling link between the MS and BSS
(SABM-Set Asynchronous Balanced Mode).

2.)The message Request for Service is passed to the MSC which relays it to the VLR.
The VLR will carry out the authentication process if the MS has been previously
registered on this VLR - if not, the VLR will have to obtain authentication parameters
from HLR. The diagram assumes the MS was previously registered on this VLR.

3.)Subscriber authentication (optional) takes place using authentication messages and
encryption algorithms and, if successful the C all setup can continue. If ciphering is to
be used this is initiated at this time as the setup message contains sensitive
information.

4.)The message "Set Up" is sent by the MS to the MSC accompanied by the call
information (type of call, and number being called etc.). The message is forwarded
from the MSC to the VLR.

5.)The MSC may initiate the MS IMEI check (is the MS stolen? etc). Note that this check
may occur later in the message sequence.

6.)In response to the message ``Set Up" (sent at step 4), the VLR sends the message
"Complete Call" to the MSC , which notifies the MS with "Call Proceeding".

7.)The MSC then assigns a traffic channel to the BS S ("Assignment Command"), which
in turn assigns an air interface traffic channel. The MS responds to the BS S (which
responds in turn to the MSC ) with "Assignment Complete".

8.)An "Initial and Final Address Message (IFAM)" is sent to the PSTN. Ring tone is applied
at the MS in response to ``Alerting", which the MSC sends to the MS when the PSTN
responds with an ``Address C omplete Message (ACM)".

9.)When answered ("Answer (ANS)" from the PSTN), the message "Connect" is
forwarded to the MS by the MSC , stopping the MS ring tone. The MSC then connects
the GSM traffic channel to the PSTN circuit, thus completing the end to end traffic
connection.

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Posted by jahangir1983

MOBILE TO LAND SEQUENCE:

1.)The subscriber pressing the send key initiates a Channel Request message from
the MS to the BSS. This is followed by the assignment of a dedicated control channel
by the BSS and the establishment of the signalling link between the MS and BSS
(SABM-Set Asynchronous Balanced Mode).

2.)The message Request for Service is passed to the MSC which relays it to the VLR.
The VLR will carry out the authentication process if the MS has been previously
registered on this VLR - if not, the VLR will have to obtain authentication parameters
from HLR. The diagram assumes the MS was previously registered on this VLR.

3.)Subscriber authentication (optional) takes place using authentication messages and
encryption algorithms and, if successful the C all setup can continue. If ciphering is to
be used this is initiated at this time as the setup message contains sensitive
information.

4.)The message "Set Up" is sent by the MS to the MSC accompanied by the call
information (type of call, and number being called etc.). The message is forwarded
from the MSC to the VLR.

5.)The MSC may initiate the MS IMEI check (is the MS stolen? etc). Note that this check
may occur later in the message sequence.

6.)In response to the message ``Set Up" (sent at step 4), the VLR sends the message
"Complete Call" to the MSC , which notifies the MS with "Call Proceeding".

7.)The MSC then assigns a traffic channel to the BS S ("Assignment Command"), which
in turn assigns an air interface traffic channel. The MS responds to the BS S (which
responds in turn to the MSC ) with "Assignment Complete".

8.)An "Initial and Final Address Message (IFAM)" is sent to the PSTN. Ring tone is applied
at the MS in response to ``Alerting", which the MSC sends to the MS when the PSTN
responds with an ``Address C omplete Message (ACM)".

9.)When answered ("Answer (ANS)" from the PSTN), the message "Connect" is
forwarded to the MS by the MSC , stopping the MS ring tone. The MSC then connects
the GSM traffic channel to the PSTN circuit, thus completing the end to end traffic
connection.

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Posted by jahangir1983

Same answer :
Um
abis
a3/a7
a1/a2
a8/a9
a10/a11

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Posted by waqqas1

Um,abis,a3/a7,a1/a2,a8/a9,a10/a11

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Posted by Hash007