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Cooperation in Heterogeneous Wireless Access Medium

Currently, there exist different wireless access networks with different capabilities in terms of bandwidth, coverage area, or cost. These wireless access networks include wireless metropolitan area networks (WMANs), cellular networks, wireless local area networks (WLANs), and so on. With overlapped coverage, cooperation among these networks will lead to better service quality to mobile users and enhanced performance for the networks. The research topics addressed by the CoNET sub-group in this area include:

One approach to improve the mobile users' service quality is achieved through bandwidth aggregation. Facilitated by the cooperation across different network domains, multi-homing techniques can support high rate applications through aggregating the offered radio resources from different available wireless access networks. In this context, our research interest is to develop cooperative bandwidth allocation mechanisms in such a heterogeneous networking environment in order to support mobile users requirements and make efficient utilization of the available resources from different networks. 

Cooperative networking can help to enhance the networks' performance through energy saving in green radio communications, which will result in a positive impact both on the environment and on the operators' profit. In this research, we aim to develop a cooperative radio resource management framework that adapts to the fluctuations in the call traffic load and maximizes the amount of energy saving under service quality constraints.

While roaming among heterogeneous networks, mobile users need to preserve their privacy. Recently, anonymity and location privacy services acquire much research attentions especially for seamless handovers among different and cooperative networks. Current mobility management protocols, such as MIPv6 and PMIP, reveal mobile user’s anonymity and location privacy by transmitting IP addresses as plain text. Moreover, the cooperation of different mobile networks, such as MANET and VANET, are prone to triangulation attackers who track mobile users using their MAC addresses. In addition, having a trade-off between network performance and mobile users’ privacy is the challenge of proposing privacy preserving schemes.

Current Researchers:

Muhammad Ismail, Amila Tharaperiya Gamage, Neda Mohammadizadeh, Sanaa Taha, Ran Zhang.