QoS in wireless multi-hop networks: coordinated anticipatory packet scheduling (CAPS)

Quality of service (QoS) provisioning in communication networks has been a field of growing interest among researchers and even greater nowadays are the QoS related challenges in the wireless scenario. This is because QoS provisioning becomes even more difficult in the case of wireless ad hoc networks (WANET) not to mention mobility embittering the situation. Providing a complete QoS for WANETs not only requires adapting a single layer for QoS but expedient interaction and cooperation among them is also a must. In this paper, we identify the inherent problem specific to QoS provisioning for an end-to-end flow in the context of WANETs. Later, we develop analytical frameworks which help us in resolving collisions and thereby improving the overall system performance resulting in significant improvement in packet delivery ratio, average delay from source to destination and its variance. The proposed scheme CAPS´s performance has been evaluated through simulations in ns-2 and the results corroborate the analytical insights that we develop in due course of this paper.