ransferred within other messages and hence not shown as a separate message. 5. RRC Connection Reconfiguration procedure is initiated by the eNodeB and conducted with the UE. The Session Management Request is passed to the UE within the RRC Connection Reconfiguration message. The new radio bearer is created between the UE and the eNodeB. 6. Bearer Setup Response is sent by the eNodeB to the MME to indicate the radio bearers have been created. Deploying IPv6 in 3GPP Networks 7. Session Management Response is sent by the UE to the MME to indicate finalization of the dedicated bearer creation process. This is the answer to the Session Management Request received within the RRC Connection Reconfiguration. 8. The upper layer traffic can now flow between the UE and the network via the dedicated EPS Bearer. The biggest difference between the EPS dedicated bearer and the GPRS Secondary PDP Context activation procedures is that the EPS dedicated bearer activation was designed to be network initiated, while the GPRS PDP Context activation is UE initiated. Both systems' specifications support both UE and network initiated connection establishment. However, in EPS the UE can request the network to perform dedicated bearer acti- vation, and the network then performs the procedure. In GPRS, it is the other way around. The dedicated bearers can be activated, modified, and deactivated. Modification means changing the characteristics of the bearer itself. For instance, by modifying the bearer, the QoS characteristics of the bearer can be changed. The bearer modification can be initialized by PGW, HSS, or the UE. When a dedicated bearer is deactivated, the traffic that would have been transferred over the dedicated bearer moves back to the default bearer. Practically, this means that the traffic no longer enjoys the QoS improvements it had in the dedicated bearer. Coming back to our highway analogy, the car pool lane ends, and the cars - the packets - move among the normal traffic. Usually, however, the traffic that was moved on th