My current research interest is focused on the following:

I am concerned of designing a framework that manages radio resources and provides end-to-end QoS at three levels: network level, link level and path level. The framework consists of different algorithms to enhance service delivery and maximize the number of admitted calls in a multi-hop wireless network.

I am collaborating in designing an integrated scheduling and pricing model for radio resource management that  exploits and enhances service delivery and increases long term revenue.

 

End-to-end QoS over backhaul wireless mesh networks:

Pricing and scheduling in HSDPA networks

Research

We extended the WiMAX module of the NS2 simulator to include the representative schedulers and a dedicated WiMAX traffic model. We evaluated the performance of these schedulers in heavy and lightly loaded WiMAX networks and concluded that none of the current schedulers is capable of providing efficient scheduling in a PMP WiMAX network.

Performance evaluation of PMP WiMAX scheduling

Motivated by  our findings in evaluating the performance of current WiMAX schedulers, we designed a sound OFDM scheduler which caters to the holdups of current schedulers. We designed two versions of the scheduler: one to minimize the blocking probability of connections in the WiMAX networks and the other to maximize the revenue based on game theory. Following the same direction we are designing a scheduler for OFDMA based WiMAX networks.

Optimal scheduling in PMP WiMAX Networks

We are designing an optimum algorithm to partition a WiMAX mesh mode frame among centralized and distributed, control and data traffic taking into consideration the network status, size, active nodes,  and traffic demand.

Optimal partitioning of WiMAX mesh mode frames

We established a WiFi test-bed and we are currently  studying the delay distribution of the real time traffic in a wireless mesh WiFi network and evaluating the audio and video performance of these networks.

Delay distribution and performance evolution of real time traffic in WiFi mesh networks

We are currently designing an optimal scheduler to guarantee QoS requirements of real time traffic in IEEE 802.11e HCCA networks.

Scheduling in HCCA IEEE 802.11e networks