Method and apparatus for PCDP discard
First Claim
Patent Images
1. A method for discarding one or more of a packet data convergence protocol (PDCP) packet or a radio link control packet, the method comprising:
- a PDCP entity receiving a PDCP service data unit (SDU) from upper layers;
the PDCP entity starting a PDCP discard timer upon receiving the PDCP SDU from upper layers;
the PDCP entity processing the PDCP SDU to form a PDCP protocol data unit (PDU);
the PDCP entity sending the PDCP PDU to a radio link control (RLC) entity for transmission;
the PDCP entity discarding the PDCP SDU based on either the PDCP discard timer expiring or receiving a PDCP status report that acknowledges receipt of the PDCP SDU by a receiving PDCP entity; and
the RLC entity discarding an RLC SDU corresponding to the PDCP PDU based on either receiving an indication of PDCP discard from the PDCP entity or re-establishment of RLC.
0 Assignments
0 Petitions
Accused Products
Abstract
A method and apparatus for discarding a packet data convergence protocol (PDCP) service data unit (SDU) are disclosed. A PDCP layer sets a timer and discards a PDCP SDU upon expiration of the timer. The timer may be set upon receiving the PDCP SDU from an upper layer or upon submitting the PDCP SDU to a lower layer for transmission. The timer and a radio link control (RLC) discard timer may be coordinated. Alternatively, the PDCP layer may discard the PDCP SDU based on a notification from an RLC layer or based on a PDCP status report.
22 Citations
10 Claims
-
1. A method for discarding one or more of a packet data convergence protocol (PDCP) packet or a radio link control packet, the method comprising:
-
a PDCP entity receiving a PDCP service data unit (SDU) from upper layers; the PDCP entity starting a PDCP discard timer upon receiving the PDCP SDU from upper layers; the PDCP entity processing the PDCP SDU to form a PDCP protocol data unit (PDU); the PDCP entity sending the PDCP PDU to a radio link control (RLC) entity for transmission; the PDCP entity discarding the PDCP SDU based on either the PDCP discard timer expiring or receiving a PDCP status report that acknowledges receipt of the PDCP SDU by a receiving PDCP entity; and the RLC entity discarding an RLC SDU corresponding to the PDCP PDU based on either receiving an indication of PDCP discard from the PDCP entity or re-establishment of RLC. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A wireless transmit receive unit (WTRU) comprising:
-
a PDCP entity configured to; receive a PDCP service data unit (SDU) from an upper layer entity, start a PDCP discard timer upon receiving the PDCP SDU from the upper layer entity, process the PDCP SDU to form a PDCP protocol data unit (PDU), send the PDCP PDU to a radio link control (RLC) entity for transmission, and discard the PDCP SDU based on either the PDCP discard timer expiring or receiving a PDCP status report that acknowledges receipt of the PDCP SDU by a receiving PDCP entity; and the RLC entity configured to discard an RLC SDU corresponding to the PDCP PDU based on either receiving an indication of PDCP discard from the PDCP entity or re-establishment of RLC. - View Dependent Claims (7, 8, 9, 10)
-
Specification