 Proxy Mobile IPv6 (PMIPv6) for interconnection with non- 3GPP networks, such as IEEE standardized wireless networks like WiFi and WiMAX [3]. The PCC architecture in LTE/LTE-Advanced mobile networks works on a service data flow (SDF) level [7]. For the purpose of QoS-related messages, S-GW and P-GW are connected with the PCRF via control interfaces by using the Diameter protocol. These interfaces control the policy and charging enforcement function (PCEF), which is located in the S-GW and P-GW. For access to non-3GPP networks, both EPC gateways (S-GW and P-GW) must also implement Diameter interfaces toward external AAA net- work nodes. When a given application server requests an EPS bearer, it is established by using signaling for lower layer bearers, which include LTE/LTE-Advanced radio bearer, S1 bearer, and S5/S8 bearer. The main goal of bearer setup and existence is minimization of QoS knowledge and configuration in mobile terminals [8]. An EPS bearer is characterized by the following main parameters: Quality of service class identifier (QCI). This is a scalar value which defines a set of QoS parameters such as delay and packet loss/error rate and sets the priority of the IP packets depending on their type and the policy decision of the mobile operator (the targeted applications are not always the ones that are used for certain QCI because each network is autonomous in definition of its QoS rules). ARP. This parameter additionally defines the priority used for the allocation and retention mechanisms for the same QCI. ARP was also used in UMTS mobile networks for QoS differentiation within the same traffic class. Guaranteed bitrate (GBR). This refers to guaranteed (minimum) bitrate for cer- tain real-time services provided by mobile operators such as carrier-grade (i.e. QoS-enabled) voice and live streaming. Maximum bitrate (MBR). This refers to setting a limit on the bitrate which is expected for the given service. The GBR parameter is used to differentiate between resource types in LTE/LTE- Advanced mobile n