Tamal Chakraborty

  • Citations Per Year
Learn More
The performance of wireless LANs is greatly affected by path loss, RF interference and other sources of signal attenuation in addition to network congestion. The primary factors involved in effective real-time communication, namely delay and loss, must be within certain controlled limits in such a scenario. In this paper, we analyze the various factors(More)
Stringent QoS maintenance in a wireless environment for VoIP communication is a major challenge. VoIP inherently generates constant bit rate traffic and is highly sensitive to network delay. However, unpredictable network congestion makes a VoIP session so degraded that its QoS goes below a tolerable limit. Accordingly, a suitable solution is needed to(More)
Rapid growth followed by increasing popularity in VoIP systems has witnessed rollout to new services and applications in emerging technologies like Cognitive Radio Networks (CRN). The stringent QoS requirements in VoIP coupled with the complexities in CRN have initiated intensive research in the field of performance analysis and optimizations guided by(More)
VoIP over Wireless LANs is greatly affected by pathloss, RF interference and other sources of signal attenuation in addition to network congestion. The primary factors involved in effective real-time communication, namely delay and loss, must be within certain controlled limits in such a scenario. Wireless LAN Access Points must, therefore, act in tune with(More)
The performance of wireless LANs is greatly affected by pathloss, RF interference and other sources of signal attenuation, in addition to network congestion. The primary factors involved in effective real-time communication, namely delay and loss, must be within certain controlled limits in such a scenario. In this paper, we analyze the various factors(More)
——VoIP over Wireless LANs is greatly affected by path-loss, RF interference and other sources of signal attenuation in addition to network congestion. The primary factors involved in effective real-time communication, namely delay and loss, must be within certain controlled limits in such a scenario. Wireless LAN Access Points must, therefore, act in tune(More)
The primary aim of Cognitive Radio Network (CRN) is to provide higher spectrum utilization through opportunistic usage of licensed spectrum bands by unlicensed (secondary) users. However, secondary users face unpredictable interruptions in transmission due to sudden arrival of primary users, resulting in either handoff or dropping instances. Channel(More)
Cognitive Radio Network (CRN) ensures higher utilization of spectrum by allowing secondary users to transmit in licensed frequency bands in absence of primary users. In order to reduce interference among these users, CRN imposes a maximum limit on total number of users that can be admitted in CRN. The overall user capacity is further increased by(More)