Patent ID: 7266105
Filing Date: 2007-09-04
Classification: H04L,H04W

Abstract:
1. A method for determining triggering of a packet data convergence protocol (PDCP) sequence number synchronization procedure in a wireless device, the wireless device utilizing a multi-layered protocol that includes: a radio resource control (RRC) layer for establishing and configuring radio links according to a plurality of RRC procedures; a PDCP layer for transfer of user data between users of PDCP services to generate corresponding PDCP protocol data units (PDUs); and a radio link control (RLC) layer for segmenting the PDCP PDUs for a medium access control (MAC) layer; the method comprising: identifying execution of an RRC procedure; when the RRC procedure triggers a serving radio network subsystem (SRNS) relocation procedure, then triggering the PDCP sequence number synchronization procedure only if a next expected UL/DL Receive PDCP sequence number invalidity event is detected during the SRNS relocation procedure; and when the RRC procedure does not trigger the SRNS relocation procedure, then triggering the PDCP sequence number synchronization procedure only if an RLC entity of a PDCP entity is re-established in response to the RRC procedure, or if a PDCP header compression protocol of the PDCP entity is changed in response to the RRC procedure.