[msa]

helow pix
can u expalin to me the difference between TBF and PDCH and how i know the utilizain of FRL link if we used GB over framelay
thank beforehand

[Pix]

TBF = group of PDCHs allocated to one user for one transfer in one direction. In normal situation, a user needs to transfer data in downlink and uplink at the same time (useful data in dl, “clicks” and ack in uplink) –> one user usually gets 1 UL TBF and 1 DL TBF.
The TBF is released a bit after the transfer is finished. One transfer, for example, is one webpage, or one MMS, or one file.

PDCH = one physical timeslot, configured for packet transfer

1 TBF = 1 user = n consecutive PDCHs
but …
1 PDCH can be shared by several TBF at the same time.

so ..
1 TBF = n consecutive PDCHs, but those PDCHs may or may not be only allocated to this TBF only.

Utilization of FRL = volume of LLC frames transmitted or received.

[DS]

Utilisation of FRL=
(LLC frames(bytes)transmitted/received)*100 / bandwidth of FRL

[msa]

excuse me and what LLC mean , and what FRL bandwidth u mean is u mean number of TS configure to FRL link.

[DS]

bandwidth= timeslots of FRL * 64

[msa]

thanx DS , and what is the LLC

[Pix]

LLC in “Google” : Logical Link Control

–> 3GPP defines the LLC precisely.

enjoy !

[Author]

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