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Dive into the research topics where Pankaj Risbood is active.

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Featured researches published by Pankaj Risbood.


international conference on computer communications | 2003

IP-subnet aware routing in WDM mesh networks

Swarup Acharya; Bhawna Gupta; Pankaj Risbood; Anurag Srivastava

The problem of routing bandwidth guaranteed paths in wavelength-routed, WDM optical mesh networks is explored. A WDM mesh network offers great flexibility in dynamically reconfiguring the optical core to match the IP layer demands. In this paper, we argue that IP subnets can limit the reconfigurability potential of the WDM mesh network. We show that finding the shortest IP-hop path, normally admitting a straightforward polynomial solution on the WDM mesh, is NP-hard in the presence of subnets. We propose a new algorithm called MobiTwist that finds the optimal shortest path when accounting for subnets. We also observe that subnets impose a routing penalty by forcing longer paths for bandwidth demands. Consequently, they create a trade-off between lower network efficiency if subnets are honored (due to longer paths) or, an upfront overhead of dynamically changing subnets to derive shorter paths. We propose the MobiFlex algorithm that attempts to achieve a balance by finding the shortest path given an upper limit on the number of subnet violations acceptable. The inherent hardness of the routing problem due to subnets precludes a solution with low worst-case complexity. However, we present performance results that show that both the algorithms proposed are extremely efficient in routing demands, and in practice, do so in polynomial time.


Archive | 2003

System and method for increasing provisionable bandwidth in time-division multiplexed communication links

Swarup Acharya; Bhawna Gupta; Pankaj Risbood; Anurag Srivastava


Archive | 2007

Wireless coverage assurance method and apparatus

Pankaj Risbood


Archive | 2005

Methods and apparatus for optimizing utilization in a ring network

Pankaj Risbood


Archive | 2005

Methods and apparatus for identifying errors and stranded resources in networks

Swarup Acharya; Edward Lafontaine; Wee Teck Ng; Pankaj Risbood


Archive | 2004

Differential delay constrained routing for virtually-concatenated data traffic

Swarup Acharya; Pankaj Risbood; Anurag Srivastava


Archive | 2003

System and method for multi-protocol label switching network tuning

Swarup Acharya; Bhawna Gupta; Pankaj Risbood; Anurag Srivastava


Archive | 2004

Link delay determination using virtual concatenation

Swarup Acharya; Bhawna Gupta; Pankaj Risbood; Anurag Srivastava


Archive | 2005

Spanning tree generation for supporting performance-guaranteed services over circuit-switched network

Swarup Acharya; Bhawna Gupta; Pankaj Risbood


Archive | 2006

Methods and apparatus for optimizing utilization in reconfigurable optical add-drop mulitplexer based ring network

Pankaj Risbood

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