SN is used for sequence delivery then why do we need two SN in PDCP and RLC?
as per my understanding , RLC sequence numbers are used to make sure ARQ functionality and sequence delivery to PDCP. PDCP SN is used to make sure of sequence delivery in handover case and other cell switchover scenario.
Why there is PDCP sequences number even though RLC has sequence number?is it RLC uses sequence number used for segmantation and PDCP sn used for HO and reestablishment?
Why do we have different SN range in PDCP (7bit & 12bit) & RLC(5bit & 10bit)?
As per 3gpp 36.322 Release 12.0 RLC specification, Extended RLC LI field = 15 bit is newly included in AM mode.
Can anyone please explain, exactly in what condition this 15-bit LI value will be used.
As RLC layer Seq. numbering is used to keep a track of packets to ARQ and PDCP, then SN should be given to RLC PDU, otherwise how it will happen in case of Segmentation and Re-segmentation?