Method of delivering a PDCP data unit to an upper layer
First Claim
Patent Images
1. A data communication method in a wireless communication system, the method comprising:
- receiving, from a lower layer, a data unit having a sequence number;
if the received data unit is received due to a RLC (Radio Link Control) re-establishment, determining whether the sequence number of the received data unit is equal to a last submitted PDCP (Packet Data Convergence Protocol) sequence number+1;
submitting, to an upper layer, in ascending order, the received data unit and any additional data units received from the lower layer having sequence numbers consecutively associated with the sequence number of the received data unit; and
setting the last submitted PDCP sequence number equal to the sequence number of the last data unit submitted to the upper layer.
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Abstract
Disclosed is a radio (wireless) communication system providing a radio communication service and a terminal, and more particularly, to a method of delivering a continuously and/or consecutively received Packet Data Convergence Protocol (PDCP) Service Data units (SDUs) to an upper layer immediately if a PDCP entity receives the PDCP SDUs during a process of a RLC re-establishment within an Evolved Universal Mobile Telecommunications System (E-UMTS) that has evolved from a Universal Mobile Telecommunications System (UMTS) or a Long Term Evolution (LTE) system.
21 Citations
14 Claims
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1. A data communication method in a wireless communication system, the method comprising:
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receiving, from a lower layer, a data unit having a sequence number; if the received data unit is received due to a RLC (Radio Link Control) re-establishment, determining whether the sequence number of the received data unit is equal to a last submitted PDCP (Packet Data Convergence Protocol) sequence number+1; submitting, to an upper layer, in ascending order, the received data unit and any additional data units received from the lower layer having sequence numbers consecutively associated with the sequence number of the received data unit; and setting the last submitted PDCP sequence number equal to the sequence number of the last data unit submitted to the upper layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
a radio protocol layer adapted to receive a data unit having a sequence number from a lower layer, to determine whether the sequence number of the received data unit is equal to a last submitted PDCP (Packet Data Convergence Protocol) sequence number+1 if the received data unit is received due to a RLC (Radio Link Control) re-establishment, to submit, to an upper layer, in ascending order, the received data unit and any additional data units received from the lower layer having sequence numbers consecutively associated with the sequence number of the received data unit, and to set the last submitted PDCP sequence number equal to the sequence number of the last data unit submitted to the upper layer. - View Dependent Claims (10, 11, 12, 13, 14)
Specification