Ad hoc network is a collection of wireless mobile nodes that dynamically form a temporary network without the use of any existing network infrastructure or centralized administration. A cognitive radio is a radio that can change its transmitter parameters based on interaction with the environment in which it operates. The basic idea of cognitive radio networks is that the unlicensed devices (co...

It is envisioned that multiple radios may be integrated into a single portable device in the near future. Such multi-radio devices may participate in multiple networks at the same time. In this paper, we consider a 802.11 WLAN network that shares a common set of multi-radio devices with another network, say CO-NETWORK, and we discuss WiMAX as one example of CONETWORK. One multi-radio device may...

Ad hoc network is a collection of wireless mobile nodes that dynamically form a temporary network without the use of any existing network infrastructure or centralized administration. A cognitive radio is a radio that can change its transmitter parameters based on interaction with the environment in which it operates. The basic idea of cognitive radio networks is that the unlicensed devices (co...

The aim of this paper is to study the impact of the base station site locations and antenna orientations on UMTS radio network performance under different traffic distributions, and to find an optimum deployment strategy from 3-sectored to 6-sectored site solutions. A radio network planning tool has been used to verify the radio network system performance of different network scenarios. The res...

The drastic growth of mobile traffic greatly challenges the capacity of mobile infrastructures. Dense deployment of low-power small cells helps alleviate the congestion in the radio access network, yet it also introduces large complexity for network management. Software-defined radio access network has been proposed to tackle the added complexity. However, existing software-defined solutions re...