Abstract
In heterogeneous network environments, it is very important for users to provide seamless services while satisfying quality-of-service, regardless of the connected access network. In this paper, we apply a concept of ad hoc cooperation for the vertical handoff in the heterogeneous network. For the seamless vertical handoff of mobile nodes, a neighbor ad hoc node assists some parts of the handoff procedures requiring large latency, such as authentication and IP registration procedures. Details of the vertical handover operation using the ad hoc cooperation are presented and its performance is evaluated. Numerical results show that the proposed vertical handoff procedure decreases the service disruption time and the probability of packet loss, compared with the conventional handoff methods that do not consider the cooperation of ad hoc node.
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Notes
In practice, the probability that a stable CoN can be found depends on several factors such as the number of neighbor nodes, the type of access technology used for discovery protocol, the discovery time duration, and the transmission power of MN [13].
In detail, the service time in the router includes queueing delay, route lookup delay, and packet processing delay. Generally the queueing delay is majority and is modelled by the exponential distribution, and the other delay terms have very small constant values [19].
Here, the analysis for the conventional schemes is not described due to the same numerical development process.
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Choi, HH., Cho, DH. On the Use of Ad Hoc Cooperation for Seamless Vertical Handoff and Its Performance Evaluation. Mobile Netw Appl 15, 750–766 (2010). https://doi.org/10.1007/s11036-009-0195-0
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DOI: https://doi.org/10.1007/s11036-009-0195-0