×

Method for transmitting PDCP status report

  • US 8,355,331 B2
  • Filed: 06/01/2011
  • Issued: 01/15/2013
  • Est. Priority Date: 03/17/2008
  • Status: Active Grant
First Claim
Patent Images

1. A method comprising:

  • processing, by a PDCP (Packet Data Convergence Protocol) entity located between upper layers and lower layers of a radio interface protocol stack, PDCP data units received from the lower layers after a PDCP re-establishment is requested from the upper layers;

    compiling, by the PDCP entity, a PDCP status report by,setting an FMS (First Missing Sequence number) field to a PDCP sequence number (SN) of a first missing PDCP SDU (Service Data Unit),if there is at least one out-of-sequence PDCP SDU stored, allocating a bitmap field of length in bits equal to the number of PDCP SNs from and not including the first missing PDCP SDU up to and including a last out-of-sequence PDCP SDUs, rounded up to the next multiple of 8,indicating a ‘

    0’

    in corresponding positions of the bitmap field for all PDCP SDUs that have not been received as indicated by the lower layers, andindicating a ‘

    1’

    in corresponding positions of the bitmap field for all other PDCP SDUs; and

    sending, from the PDCP entity to the lower layers, the PDCP status report as a PDCP PDU (Protocol Data Unit) for transmission to a peer PDCP entity at a receiving side.

View all claims
  • 3 Assignments
Timeline View
Assignment View
    ×
    ×