implement the pdp context between user equipment 2 and the serving gprs support node 8 radio access bearers rab are established which allow for data transfer across the radio bearer 6 and the iu interface 10 the physical channels established between the user equipment 2 and the radio network controller 4 are referred to as radio bearers rb the implementation of these logical and physical channels is known and is therefore not discussed further herein in existing systems multiple flows within a pdp context are all treated in the same manner based on pdp context attributes such as quality of service qos or charging treatment the possibility exists to create a secondary pdp context at the user equipment so that certain flows from the user equipment can be treated differently in their transmission across the network for example there are a number of quality of service traffic classes applying to flows of differing kinds conversational streaming interactive and background depending on the nature of the data to be transmitted across the network the appropriate quality of service is requested by the user equipment 2 and is authorized by the network by way of background reference is made to fig2 a which is a schematic diagram illustrating the authorisation of qos resources at an originating pcf.