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Communication in next generation networks will use multiple access technologies, creating a heterogeneous network environment. To enable end-user terminals to move between access networks with minimal disruption, the terminals should be able to maintain multiple active network connections. Such a multihomed mobile host will experience different cap...
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... CN receiving the packet will replace the source address with the address in the home address destination option before handing the packet to the transport layer. The routing created by MIP is referred to as triangular routing (see figure 2). Here packets from a CN are sent to the HA. ...
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... Our own previous work in the area includes prototype development [20], comparison of network and host based mobility solutions [21], proposal of QoE optimized mobility solutions [22], and mobility management for highly mobile users [23]. Moreover, we proposed composite metrics [24], multimedia flow mobility [25], and globally optimized mobility handling schemes [26]. Last, but not least, we have previously proposed cross-layered designed mobility management solutions [27] and described common interworking techniques in heterogeneous wireless networks [28]. ...
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... The solution for access network selection being proposed in this article is built on previous work where a traffic load metric called the Relative Network Load, RNL, was defined[31]and an architecture for port-based multihomed Mobile IPv6 was proposed[32](figure 3). Furthermore, service levels in that type of networking environment were proposed to be monitored using the model described in[33].In the proposed architecture, the mobile nodes register their access network specific IP addresses (referred to as care of addresses, CoAs) with a centralized router, the home agent. ...
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KeywordsIP flow mobility–Mobile data offload–Optimized access network selection–Heterogeneous wireless networks–WLAN–LTE
... Port-based Multihomed Mobile IPv6: Loadbalancing in Mobile Ad hoc networks [12], Chapter 8 Multimedia flow mobility in heterogeneous networks using Multihomed Mobile IPv6 [10] Multimedia flow mobility in heterogeneous networks using Multihomed Mobile IP [11], Chapter 7 ...
... In relation to the sixth issue, the thesis proposes a strategy to identification and mobility management of individual traffic flows in a heterogeneous network environment [11]. Flow mobility enables simultaneous usage of multiple interfaces of a MN. ...
... 11 shows a routing table in the MN for the topology given in figure 4.10. In this scenario the MN receives a topology correct address from each subnetwork and registers these addresses with it's HA and the CNs using route optimization. ...
This thesis proposes, describes and validates solutions to enhance mobility in heterogeneous access networks. Wireless access networks have become available almost everywhere and current research strives to make them pervasive. Users having wireless access to the Internet are driving the demand for mobile and heterogeneous solutions where services could be accessed from anywhere, any time and from any device. Future wireless connectivity will be provided through a mix of coexisting heterogeneous access network technologies. To enhance mobility in heterogeneous networks this thesis focuses on mobility management systems and connectivity of wireless multi-hop ad hoc networks to the Internet. In a wireless environment with overlapping service areas, mobile nodes need to select which gateway(s) to use to access the wireless infrastructure. The metrics used to select the point of attachment within an access technology are insufficient to compare the capacity of different technologies or multi-hop routes. This thesis
... We intend to extend the developed node model with support for more radio access networks (UMTS), to implement full-stack support, to implement port-based handling of different flows [14], and to let the decision model be influenced by parameters from other layers than the network layer. Finally, triggers from lower layers will also be used in future versions in order to make the solution even more responsive to varying network conditions. ...
Mobile telephone handsets, laptops, and PDAs are today typically equipped with multiple radio access interfaces. The opportunity to connect to more than one access network at a time makes users capable of roaming over access technologies and administrative domains seamlessly. Soft hand-overs can easily be implemented and load balancing is possible to leverage when the amount of traffic exceeds the capacity of one single radio access interface. Using an IP overlay network and handling mobility management at the network layer is one import candidate for tomorrow's networking architectures. Mobile IPv6 with its extensions for fast hand-overs and hierarchies of mobility anchor points is a concrete implementation of such an architecture. Adding multihoming functionality to Mobile IPv6, basically allowing a mobile node to connect to more than one gateway in different subnets simultaneously, is yet a step towards the efficient implementation of the foreseen architecture. In this paper, we describe an OPNET implementation of multihomed Mobile IPv6 using one IEEE 802.11 radio access interface (WLAN) and one IEEE 802.16 (WiMAX) interface in the mobile node.
... All in all, three cases were studied in parallel where handover mode was set to automatic in the first case and to manual in the second and third case. OPNET Modeler 14.5 PL0 [13] was used as simulation tool in all three cases. The constants c and h were set to c = h = 5, and the weight w b was set to w b = 1. ...
Future users of mobile telephones and other handheld devices will benefit from a variety of wireless access networks including cellular networks, wireless LANs, and wireless MANs. Investments in new wireless infrastructures, new and changed use of radio spectrum, and built-in support for multiple radio access technologies in devices are driving forces behind this trend. The vision of Always Best Connected will finally be reached and users will connect seamlessly to various services delivered over the Internet regardless of media. This paper proposes a combined network and application layer access network decision model for multimedia applications in heterogeneous networking environments. It builds on previous work of a network layer based metric used in combination with multihomed Mobile IP and introduces a mechanism for applications to interact with the mobility management system in the mobile node. This way, applications executing in the mobile node can decide either to take access network decisions on their own or to let the network layer handle mobility management tasks automatically based on default decision criterion decided by the end-user. An extended architecture based on previous work and the upcoming IEEE 802.21 standard for media-independent handover services is presented. The control plane, named "Mobile Mediator Control Function", offers a set of events and commands through an additional service access point. Results from a scenario with a Voice over IP application running in the proposed environment simulated in OPNET Modeler are presented.
... In previous work differentiation in access network selection decisions for a set of simultaneously executing applications was proposed to be handled through port-based handling [98]. The BU message structure was changed, so that the MN could indicate to the HA to direct traffic destined for certain combinations of ports and transport protocols via a specified access network. ...
... The solution for access network selection being proposed in this article is built on previous work where a traffic load metric called the Relative Network Load, RNL, was defined [74] and an architecture for port-based multihomed Mobile IPv6 was proposed [98] (Figure 9.3). Furthermore, service levels in that type of networking environment were proposed to be monitored using the model described in [99]. ...
... An architecture for seamless mobility management in various types of applications using a combination of MIP and SIP [5] Port-based Multihomed Mobile IPv6 for Heterogeneous Networks [2] Traffic load Metrics for Multihomed Mobile IP and Global Connectivity [1] Multimedia flow mobility in heterogeneous networks using Multihomed Mobile IPv6 [3] Multimedia flow mobility in heterogeneous networks using Multihomed Mobile IP [4] Multihomed Mobile IPv6: OPNET Simulation of Network Selection and Handover Timing in Heterogeneous Networking Environments [6], chapter 4 ...
... Generally speaking, realtime and non-realtime applications as well as interactive and noninteractive applications may have different requirements on network characteristics. In previous work differentiation in access network selection decisions for a set of simultaneously executing applications was proposed to be handled through port-based handling [4]. The BU message structure was changed, so that the MN could indicate to the HA to direct traffic destined for certain combinations of ports and transport protocols via a specified access network. ...
