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What is FMS and BITMAP fields in PDCP status PDU?

+3 votes
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This status PDU is it necessary in pdcp? if yes when it is required?

posted Oct 24, 2014 by Vasu

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1 Answer

0 votes

I believe you are talking about PDCP Status Report which has FMS and BITMAP -

FMS
PDCP SN of the first missing PDCP SDU

BITMAP
• The MSB of the first octet of the type "Bitmap" indicates whether or not the PDCP SDU with the SN (FMS + 1) modulo 4096 has been received and, optionally decompressed correctly.
• The LSB of the first octet of the type "Bitmap" indicates whether or not the PDCP SDU with the SN (FMS + 8) modulo 4096 has been received and, optionally decompressed correctly.

For more detail please look at http://www.eventhelix.com/lte/presentations/3GPP-LTE-PDCP.pdf

answer Oct 24, 2014 by Salil Agrawal
thank you salil agrawal
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