Patent ID: 7301947
Filing Date: 2007-11-27
Classification: H04L

Abstract:
1. A method comprising: establishing a data packet connection in a telecommunications system, in which a context identifier is transmitted either as part of a compressed data packet or in a header of a data packet to be transmitted at the convergence protocol layer of the telecommunications system, the header comprising a value-limited field to which context identifiers are attached, selecting a transmission method of the context identifier by determining the number of available PID values in the header of the convergence protocol layer data packets, determining the number of context identifiers defined for a compression method, checking whether data transmission connection definitions of the data packet connection require the use of a header in convergence protocol layer data packets in response to the fact that the number of available PID values in the header of the convergence protocol layer data packets exceeds or equals the number of context identifiers defined for the compression method, and attaching the context identifiers to the headers of the convergence protocol layer data packets in response to the fact that the data transmission connection definitions of the data packet connection require the use of a header in the convergence protocol layer data packets; or attaching the context identifiers to a compressed data packet in response to the fact that the data transmission connection definitions of the data packet connection do not require the use of a header in the convergence protocol layer data packets.