Extending QoS Policy-based mechanisms to B3G Mobile Access Networks
نویسندگان
چکیده
In order to provide end-to-end QoS in B3G systems, based on the UMTS architecture, the DiffServ framework can be used in the data plane of the IP core network of the mobile access network. Among the different schemes proposed for the control plane of DiffServ, the Internet2 bandwidth broker approach has been chosen for its centralized management nature, which is needed to coordinate QoS between the different entities of the heterogeneous access network: the core network, the radio, external bearer services and the user. It will be shown that policy-based service negotiation is an important component of the bandwidth broker and of the control plane, in order to provide a flexible end-to-end QoS management in B3G systems. Furthermore, the following issues regarding the proposed policy-based architecture are identified: the need for a policy decision point at the radio bearer service entity, the interaction of service negotiation and mobility management protocols, and the impact of WLAN coupling.
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