Vertical Handover (VHO) decision algorithm for heterogeneous network architectures which integrate both cellular networks and Wireless Local Area Networks (WLANs). The cellular-WLAN and WLAN-WLAN VHO decisions are taken based on parameters which characterize both the coverage and the traffic load of the WLANs. Both HHO and VHO processes consist of three steps: handover requirement estimation, target network selection and handover execution [8]. Networks such as LTE, WLAN and WiMAX provide multiple choices for network access. Moreover, roaming terminals are equipped with multiple radio interfaces for heterogeneous wireless network access. Handoff Decision is very crucial process because it will be helpful in determining when and where to perform handoff and to select the best network in the Heterogeneous environment without any degradation in the performance.
Papers:
Obayiuwana, E. and Falowo, O.E., 2017. Network selection in heterogeneous wireless networks using multicriteria decision-making algorithms: a review. Wireless Networks, 23(8), pp.2617-2649.
Ndashimye, E., Ray, S.K., Sarkar, N.I. and Gutiérrez, J.A., 2017. Vehicle-to-infrastructure communication over multi-tier heterogeneous networks: a survey. Computer Networks, 112, pp.144-166.
Obayiuwana, E. and Falowo, O.E., 2017. Network selection in heterogeneous wireless networks using multicriteria decision-making algorithms: a review. Wireless Networks, 23(8), pp.2617-2649.
Sarkar, S.K., Basavaraju, T.G. and Puttamadappa, C., 2016. Ad hoc mobile wireless networks: principles, protocols, and applications. CRC Press.
Baghla, S. and Bansal, S., 2014, November. Performance of VIKOR MADM method for Vertical Handoffs in Heterogeneous networks with various weighting methods. In 8th International Conference on Advanced Computing and Communication Technologies ICACCT 2014 (pp. 29-34).
Omheni, N., Zarai, F., Obaidat, M.S., Smaoui, I. and Kamoun, L., 2014. A MIH-based approach for best network selection in heterogeneous wireless networks. Journal of Systems and Software, 92, pp.143-156.
Bhosale, S. and Daruwala, R., 2014. Multi-criteria Vertical Handoff Decision Algorithm Using Hierarchy Modeling and Additive Weighting in an Integrated WLAN/WiMAX/UMTS Environment-A Case Study. KSII Transactions on Internet & Information Systems, 8(1).
The most recent advances and standard performance assessment metrics for efficient vertical handoff in heterogeneous network by CEAM Protocol are
From an architecture perspective, the HetNet can be viewed as encompassing conventional macro radio access network (RAN) functions, RAN transport capability, small cells and Wi-Fi functionality, that are increasingly being virtualized and delivered in an operational environment where span of control includes data center resources associated with compute, networking and storage.
In this framework, self-optimizing network (SON) functionality is essential to enable order-of-magnitude network densification with small cells. Self-configuration or ‘plug and play’ reduces time and cost of deployment, while self-optimization then ensures the network auto-tunes itself for maximum efficiency as conditions change. Traffic demand, user movements and service mix will all evolve over time, and the network needs to adapt to keep pace. These enhanced SON capabilities will therefore need to take into account the evolving user needs, business goals and subscriber behaviours.
Importantly, functions associated with HetNet operations and management take earlier SON capability that may have only been targeted at a single domain and/or technology, and expand it to deliver automated service quality management across the entire HetNet.
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