Patent ID: 7400636
Filing Date: 2008-07-15
Classification: H04L,H04W

Abstract:
1. A method for establishing header compression (HC) context associated with a header compression and de-compression according to a change of a channel type for a packet data service in a mobile communication system providing the packet data service, the method comprising the steps of: configuring a radio bearer (RB) of a predetermined channel type used for compressing and de-compressing headers of packets between a radio network controller (RNC) and a user equipment (UE); providing the packet data service from the RNC to the UE via the RB; when the channel type is changed, determining configuration information associated with an RB of a new channel type in accordance with a message to the UE from the RNC; acquiring the HC context used in the RB of the predetermined channel type via primitive exchange with a packet data convergence protocol (PDCP) entity of the RB of the predetermined channel type in the UE in accordance with the configuration information; configuring the RB of the new channel type based on the acquired HC context; and continuously providing the packet data service via the RB of the new channel type.