Conference Paper

A combined mobility and QoS framework for delivering ubiquitous services

Centre for Telecommun. Res., King's Coll. London, London
DOI: 10.1109/PIMRC.2008.4699885 Conference: Personal, Indoor and Mobile Radio Communications, 2008. PIMRC 2008. IEEE 19th International Symposium on
Source: IEEE Xplore

ABSTRACT From a network perspective, the major challenge in providing seamless connectivity whilst maintaining the required level of QoS to users results from the negative interactions that occur between mobility and QoS. These interactions, particularly those of mobility and QoS, have been the subject of much research. In this paper, we discuss the various approaches that have already been taken to combine QoS and mobility mechanisms, and present a new framework to combine such mechanisms with the aim of reducing the negative interactions that might arise between them. We propose the concept of enhanced nodes which is a special IP router with an extra sub-layer of mobility, QoS and security features. Our framework is illustrated with an example of a QoS-based mobility selection mechanism.

  • [Show abstract] [Hide abstract]
    ABSTRACT: Mobile IPv6 (MIPv6) is proposed to enable network applications to continuously operate at the required quality of service in the wire or wireless IP network. Handover latency of MIPv6 is the main cause of packet loss and performance degradation and is too long for real-time and throughput-sensitive applications. Enhancement of basic MIPv6 with respect to handover latency has been studied widely. A L3 handover procedure can be divided into four phases: Movement Detection, CoA Configuration, Home agent Registration and Route Optimization. The latencies in different handover phases have been measured in an operated wireless LAN (WLAN) in order to determine the performance bottleneck of handover. The effect of handover latency on the sliding window of TCP and application layer protocol is also parsed with experiment. Further more, we modify the MIPv6 implementations of Linux on mobile node and home agent to verify the potential of performance improvement for MIPv6 protocol. The experiment result can help the enhancement of MIPv6 and application development.
    Proceedings of the Global Communications Conference, 2007. GLOBECOM '07, Washington, DC, USA, 26-30 November 2007; 01/2007
  • [Show abstract] [Hide abstract]
    ABSTRACT: The current modus operandi of different proposed architectures for all-IP mobile and wireless networks is commonly based on the assumption of best-effort routing and per-class (DiffServ) or per-flow (IntServ) treatment of IP traffic. At the same time, emergence and promotion of QoS routing as an embedded network feature seems orthogonal to the deployment of current μ-mobility protocols. The stance to be defended by the authors is that interactions between μ-mobility solutions and different QoS-aware path selection logics (present in QoS routing) do exist and, depending on the solution supported in the scoped domain, non-desirable phenomena may occur degrading the general packet delivery efficiency. The clashing properties of two sets of solutions reflect in the realisation of mechanisms for instalment, maintenance and adaptability of packet forwarding mechanisms to mobile destinations. The impetus of the paper is to unfold the hidden interactions between these two sets of solutions and to throw sharper light on the current vagueness and lack of specificity of deploying QoS routing schemes in a mobile/wireless network arena by proposing different solutions, while at the same time stating that integration of QoS and mobility is an important challenge for development of future IP networks.
    IEE Proceedings - Communications 07/2004; · 0.32 Impact Factor

Full-text (2 Sources)

Available from
May 28, 2014