T3126

[netter2k]

Dear Guru,

Please explain me about T3126.
What is definition t3126? What for t3126?
What effect if t3126 expired?
Thanks a lot for your kindly help.


BR\\Netter2k

[wolverine]

Timer T3126 is used in the RACH procedure by the MS. Namely..

"Having sent M + 1 CHANNEL REQUEST messages, the RR entity of the mobile station starts timer T3126. At expiry of timer T3126, the immediate assignment procedure is aborted"

and

"T3126: This timer is started either after sending the maximum allowed number of CHANNEL REQUEST messages during an immediate assignment procedure.

or

on receipt of an IMMEDIATE ASSIGNMENT REJECT message,

whichever occurs first.

It is stopped at receipt of an IMMEDIATE ASSIGNMENT message, or an IMMEDIATE ASSIGNMENT EXTENDED message.

At its expiry, the immediate assignment procedure is aborted.
The minimum value of this timer is equal to the time taken by T+2S slots of the mobile station's RACH. S and T are defined in sub-clause 3.3.1.2. The maximum value of this timer is 5 seconds."

The relevant spec is 04.08

[ghassen]

Timer T3126 is used in the RACH procedure by the MS. Namely..

"Having sent M + 1 CHANNEL REQUEST messages, the RR entity of the mobile station starts timer T3126. At expiry of timer T3126, the immediate assignment procedure is aborted"

and

"T3126: This timer is started either after sending the maximum allowed number of CHANNEL REQUEST messages during an immediate assignment procedure.

or

on receipt of an IMMEDIATE ASSIGNMENT REJECT message,

whichever occurs first.

It is stopped at receipt of an IMMEDIATE ASSIGNMENT message, or an IMMEDIATE ASSIGNMENT EXTENDED message.

At its expiry, the immediate assignment procedure is aborted.
The minimum value of this timer is equal to the time taken by T+2S slots of the mobile station's RACH. S and T are defined in sub-clause 3.3.1.2. The maximum value of this timer is 5 seconds."

The relevant spec is 04.08
this parameter is M = RACH_MAX_RETRANSMISSION = 1,2,4,7
http://images1.hiboox.com/images/1909/diapoc8b6bd823262b4f8df3d17f805b307aa.jpg?26

[netter2k]

Dear Guru,

Could please provide GSM04.08? or other documents which related T3126?
Thanks a lot.

BR\\netter2k

[wolverine]

All the 3GPP specifications are freely available at www.3gpp.org

Look under the specifications area. I highly recommend spending some time looking around the site as it is the definitive answer to every question you might have. Specifications are not very easy to read but you will get used to them the more you read them.

[oyikewang]

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