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Cross-layer Design of Private MAC with TH-BPPM and TH-BPAM in UWB Ad-hoc Networks
Parvez, A.Al,Khan, M.A.,Hoque, M.E.,An, Xizhi,Kwak, Kyung-Sup The Korea Institute of Information and Commucation 2006 韓國通信學會論文誌 Vol.31 No.12A
Ultra-wideband(UWB) is a killer technology for short-range wireless communications. In the past, most of the UWB research focused on physical layer but the unique characteristics of UWB make it different to design the upper layer protocols than conventional narrow band systems. Cross-layer protocols have received high attention for UWB networks. In this paper, we investigate the performance of two physical layer schemes: Time Hopping Binary Pulse Position Modulation(TH-BPPM) and Time Hopping Binary Pulse Amplitude Modulation (TH-BPAM) with proposed private MAC protocol for UWB ad-hoc networks. From pulse level to packet level simulation is done in network simulator ns-2 with realistic network environments for varying traffic load, mobility and network density. Our simulation result shows TH-BPAM outperforms TH-BPPM in high traffic load, mobility and dense network cases but in a low traffic load case identical performance is achieved.
Analysis of Energy Consumption and Sleeping Protocols in PHY-MAC for UWB Networks
Khan, M.A.,Al Parvez, A.,Hoque, M.E.,An, Xizhi,Kwak, Kyung Sup IEEE 2007 Advanced Communication Technology, The 9th Interna Vol.1 No.-
<P>Energy conservation is an important issue in wireless networks, especially for self-organized, low power, low data-rate impulse-radio ultra-wideband (IR-UWB) networks, where every node is a battery-driven device. To conserve energy, it is necessary to turn node into sleep state when no data exist. This paper addresses the energy consumption analysis of direct-sequence (DS) versus time-hopping (TH) multiple accesses and two kinds of sleeping protocols (slotted and unslotted) in PHY-MAC for UWB networks. We introduce an analytical model for energy consumption of a node in both TH and DS multiple accesses and evaluate the energy consumption comparison between them and also evaluate the performance of the proposed sleeping protocols. Simulation results show that the energy consumption per packet of DS case is less than TH case and for slotted sleeping is less than that of unslotted one for bursty load case, but with respect to the load access delay unslotted one consumes less energy, that maximize node lifetime.</P>
Analysis of Energy Consumption and Sleeping Protocols in PHY-MAC for UWB Networks
Khan, M.A.,Parvez, A.Al,Hoque, M.E.,An, Xizhi,Kwak, Kyung-Sup The Korea Institute of Information and Commucation 2006 韓國通信學會論文誌 Vol.31 No.12b
Energy conservation is an important issue in wireless networks, especially for self-organized, low power, low data-rate impulse-radio ultra-wideband (IR-UWB) networks, where every node is a battery-driven device. To conserve energy, it is necessary to turn node into sleep state when no data exist. This paper addresses the energy consumption analysis of Direct-Sequence (DS) versus Time-Hopping (TH) multiple accesses and two kinds of sleeping protocols (slotted and unslotted) in PHY-MAC for Un networks. We introduce an analytical model for energy consumption or a node in both TH and DS multiple accesses and evaluate the energy consumption comparison between them and also the performance of the proposed sleeping protocols. Simulation results show that the energy consumption per packet of DS case is less than TH case and for slotted sleeping is less than that of unslotted one for bursty load case, but with respect to the load access delay unslotted one consumes less energy, that maximize node lifetime.
An Energy Consumption Model for Time Hopping IR-UWB Wireless Body Sensor Networks
M. E. Hoque,M. A. Khan,Al. Parvez,Xizhi An,Kyung Sup Kwak 대한전자공학회 2007 ITC-CSCC :International Technical Conference on Ci Vol.2007 No.7
In this paper, we focused on the energy consumption model of Wireless Body Sensor Networks (WBSN), where sensors can be deployed in various part of a human body. Since energy limitation is one of the biggest challenging issues in sensor network, it becomes more crucial for some special devices if those are used inside the body and then become impossible to replace frequently. In such a case, we must need to increase the lifetime of a sensor node. We proposed a Time Hopping Impulse Radio Ultra Wide Band (TH IR-UWB) energy consumption model for sensor nodes along with the slotted sleeping protocol. Simulation results showed that energy consumption per bit was very low and therefore this energy model was useful to increases the lifetime of WBSN.