Buffering Technique for Optimizing Energy Consumption in the Transmission of MultimediaTraffic in Ad-Hoc Networks

Energy constraints on wireless nodes represent a current field of research. Such restrictions are particularly significant because of the great amount of features and applications currently available on devices, which contribute to dramatically increase energy consumption. However, when transmitting delay-sensitive data, such as multimedia streaming, a balance between energy optimization and quality of service is required. In this sense, there are many works that address this issue from different layers of network architecture separately; however, a more efficient solution could be achieved by combining the management capabilities of the different layers and the joint use of such information, which is called a crosslayer mechanism. Moreover, despite the fact that the IEEE 802.11 standard defines an energy management mechanism at MAC level, it is envisaged only for structured networks, leaving just general guidelines for other kind of networks, such as Ad- Hoc networks. Therefore, as a first step towards the design of a cross-layer scheme, this paper analyzes the flaws of IEEE 802.11 standard as regards the infrastructureless mode and proposes an optimization mechanism for energy management in Ad-Hoc networks. The proposed approach is based on a buffering mechanism, which is able to increase power-saving periods of time in Ad-Hoc nodes. Simulations using NS3 indicate that it is possible to obtain higher levels of residual energy at the end of a transmission using the proposed scheme.Gonzalez, S.; Arce Vila, P.; Guerri Cebollada, JC. (2015). Buffering Technique for Optimizing Energy Consumption in the Transmission of MultimediaTraffic in Ad-Hoc Networks. IEEE Latin America Transactions. 13(1):250-258. doi:10.1109/TLA.2015.7040655S25025813

Energy aware power save mode management in wireless mesh networks

In recent times Wireless Mesh Networks (WMN) have evolved as powerful networks for most commercial applications. Many contributions have been made to enhance the performance of WMN of which the enhancement of the network lifetime remains as one of the challenging area for research. IEEE standard proposed an amendment which introduced Power Save Mode (PSM) in order to increase the lifetime of WMN. It has three modes such as Active, Light Sleep and Deep Sleep. There exist a lot of literature on increasing energy efficiency by keeping node in Deep Sleep mode when it is not involved in transmission. But current Power Save Mode has some deficiency in low Packet Delivery Ratio (PDR). This paper presents Energy Aware Power Save Mode (EAPSM) which attempt to overcome the deficiency of low PDR by triggering PSM. EAPSM consist of three modules namely, remaining energy calculator, transmission mode identifier and PSM scheduler. EAPSM schedules PSM based on the constraints such as remaining energy of a node and its participation in transmission. The proposed method includes mathematical model and algorithms which gives improved performance over conventional PSM