Moby Dick Consolidated System Integration Plan

D0103v1.doc Version 1 6.7.2003
ditional concept of a Base Station, the actual access point of the wireless technology to a wired infrastructure,
but enriched with IP routing capabilities.
• Network management servers in the fixed network for mobility management, AAA, QoS and paging
issues
The architectures’ flexibility and the use of IP for mobility management, QoS provisioning and AAAC as
a convergence layer allows an easy and simple integration of any other access technology like UWB. In
greater detail, the network management servers consist of an AAAC system, a Home Agent for IPv6
mobility management, a QoS Broker and an IP Paging Agent. The mechanisms provided by these entities
and its proper interworking provides an overall architecture, which supports an open, cheap, efficient and
seamless network access.
The TD-CDMA support is achieved by the direct connection of the base station to the IP network (eliminating
several of the elements defined in the 3GPP UMTS architecture such as RNC, SGSN, GGSN, and thus,
simplifying the overall protocol stack). The base station was developed using platform supporting TD-CDMA-
TDD mode. Thus, the network access is provided by a radio access router which controls one radio cell. On IP
layer one, the IP subnet is directly mapped to such a radio cell.
To provide seamless mobility competitive to the one provided by existing cell networks, but with the advantage to
increase the scope of mobility across cells based on different access technologies, Fast Handover with some
enhancements and context transfer techniques are used. To increase the efficiency of both the mobile end systems
and the resource usage of the still scarce access medium, and to overcome the tremendous power required, an IP
paging concept was integrated into the overall architecture. For the provision of QoS the Diffserv model was
adopted because of its higher scalability and reduced signalling overhead. For the overall end-to-end QoS
provisioning, the association of Diffserv principles with the use of QoS Brokers controlling a QoS domain
provided large-scale support for quality of service. The AAAC support is based on the IRTF AAA Architecture
and enriched with Auditing and Charging mechanisms. This architecture covers the full integration between
AAAC, QoS, and Mobility, which provides a large step towards an real All-IP 4G network architecture
supporting TD-CDMA based access technologies as well as IEEE 802.11. The whole architecture is based on
IPv6 exploiting all IPv6 specific support for IP based mobility management.
Within Moby Dick it is foreseen, that one end-system is equipped with more that network interfaces –
which might be based different technologies -, but only one interface will be user at the same time, except
of a small period of time during a seamless handover procedure.
Figure 2 shows a more specific figure of the overall Moby Dick architecture. Here there are different
Administrative domains shown. These domains operate based on same or different access network
technologies. E.g. in the figure Domain C is based all 3 network technologies considered within the
project.
The Correspondent Node (CN) is connected via an unknown QoS supporting access technology to the
backbone and is located in the administrative Domain D.
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