Vinod Ramachandran

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—Femtocells are low-cost, miniature base-stations intended to improve indoor coverage in 3G networks and beyond. One of the main issues in adopting femtocells en masse is the surge in interference to the mobile users served by the macrocell arising from unplanned networks and private access. Therefore, distributed power control mechanisms for femtocells are(More)
Multi-tiered enterprise applications, which comprise of many (heterogeneous and possibly loosely coupled) components at various layers of the IT stack, typically have configuration dependencies between these different components. A change in the value of a configuration parameter of a component may require changing one or more parameters of other components(More)
Orthogonal Frequency Division Multiple Access (OFDMA) is the preferred multiple access scheme for future broadband cellular systems as it provides high spectral efficiency. The choice of OFDMA scheduler and the amount of channel quality feedback from users together determine the achievable throughput and fairness. Channel quality reporting by all active(More)
—In this paper, we consider the Single Frequency Network (SFN) operation of broadcast/multicast services, and develop resource allocation schemes to minimize the amount of resource over-provisioning. Over-provisioning is required when SFN areas are overlapping because all the cells in the SFN area should use the same resource to transmit a given MBMS(More)
— Scheduling of uplink data by the network typically requires that the buffer status information from each User Equipment (UE) is available at the network to ensure that the air interface resources are not wasted. The presence of delay constrained flows or radio bearers at the UE may impose a constraint that the delay information be available at the network(More)
In this paper, we analyze the throughput and delay for the messages sent on Enhanced Access Channel (EACH) in High Rate Packet Data (HRPD) revision A through extensive simulations. We also provide an analytical model and the corresponding throughput equations to validate the simulation results. The analysis predicts that the capacity is directly tied to the(More)
Today's routing infrastructure is built using special purpose hardware due to the demand for very high through-put. With the growth of hardware techniques, satisfying this huge demand is made possible. However the down-side of this hardware based architecture is that upgra-dation is very rare due to high costs and extensibility is limited which heavily(More)