Predicting RF coverage in large environments using ray-beam tracing and partitioning tree represented geometry . - Ajay Rajkumar; Bruce F. Naylor; Farid Feisullin; Lois Rogers (Wirel. Networks, 1996)

Efficient Computational Model for Energy Propagation in Geoemtrically Represented Large Envirnoments. - Ajay Rajkumar (1999)

Seamless SIP-based VoIP in disparate wireless systems and networks. - Ajay Rajkumar; Peretz Feder; Steven A. Benno; Tom Janiszewski (Bell Labs Tech. J., 2004)

System aspects and handover management for IEEE 802.16e. - Suman Das; Thierry E. Klein; Ajay Rajkumar; Sampath Rangarajan; Michael D. Turner; Harish Viswanathan (Bell Labs Tech. J., 2006)

Evolution of Mobility in Future Wireless Networks. - Ajay Rajkumar (J. Cyber Secur. Mobil., 2012)