A Bandwidth Efficient Scheduling Framework for Non Real Time Applications in Wireless Networks

Abstract

The key concern on the bandwidth allocation and scheduling for non real time traffic are the fulfillment of its minimum throughput requirement and improvement of bandwidth utilization with acceptable delay. This paper proposes a simple and efficient scheduling framework for allocating bandwidth to non real time polling service (nrtPS) users in IEEE 802.16 networks. In this framework, jointly selective repeat ARQ at the MAC layer and adaptive modulation and coding techniques at the physical are considered. Numerical simulations demonstrate that the proposed scheduling approach provides a graceful compromise between bandwidth utilization and packet delivery delay while maintaining the minimum throughput requirements of nrtPS applications. Thus proves the efficiency of the proposed framework. The simulation is done for unicast scenario.

Cryptanalysisof two mutual authentication protocols for low-cost RFID

“…• Desynchronization: This is an active attack in which a malicious adversary tries to cause the tag and the reader to update inconsistent values and make tag disabled [11]. In recent years, many researchers have tried to propose lightweight and secure authentication protocols [12,13,14,15,16,17,18,19,20,21,22,23,24], but unfortunately many vulnerabilities have been found in their schemes [25,26,27,28,29,30,31,32,33,34,35,36,37,38]. Recently Fu et al [39] proposed a scalable RFID mutual authentication and Li et al [40] suggested a mutual authentication protocol for RFID communication.…”