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Bagubali, A.
- Energy Optimization Packet Scheduling Algorithms on a Mobile Wimax Using Ns2
Authors
1 CEG, Anna University Chennai, Tamil Nadu, IN
2 VIT University, Vellore, Tamil Nadu, IN
3 Department of Electronics and Communication Engineering, CEG, Anna University Chennai, Tamil Nadu, IN
Source
Wireless Communication, Vol 1, No 6 (2009), Pagination: 243-248Abstract
Recently, mobile communication technologies have been developed rapidly. The IEEE 802.16e wireless metropolitan area network (WMAN) standard is an emerging technology to support roaming mobility of mobile stations (MSs) in outdoor environment. For MSs powered by batteries, the standard supports power saving mode to conserve battery power meanwhile fulfilling the requirements of quality of services. Regarding to different service types, standard defines three different power saving types for them and each type has its own power saving parameters. In this paper, Broadband wireless access systems usually provide flexible sleep-mode operations for mobile stations to conserve their energy during idle or active mode. For Mobile WiMAX, the IEEE 802.16e, offers several power-saving classes that can be associated with different types of network connections to minimize power consumption of mobile stations.
Keywords
Mobile WiMAX, Power Saving, Energy Efficiency, Packet Scheduling.
- Spectrum Management using Cognitive Radio for Safety and Security of Coal Mine Workers
Authors
1 VIT University, Vellore - 632014, Tamil Nadu, IN
2 Galgotias University, Noida - 201310, Uttar Pradesh, IN
Source
Indian Journal of Science and Technology, Vol 9, No 44 (2016), Pagination:Abstract
Objectives: Underground mine communication is the most vital factor today to monitor different parameters continuously and to take necessary actions accordingly to mitigate all hazards that happen inside mines. Accidents in coal mines occur due to inadequacy of information from the mine environment due to inefficiency of existing phone systems. Methods/ Statistical Analysis: In this paper, cognitive radio technology is used in underground coal mines to wirelessly transmit crucial parameters such as temperature, humidity and methane gas levels to enhance the safety and security of coal mine workers. To depict cognitive radio, two communication channels, Bluetooth and RF have been used. These wireless channels are used to transmit data from the hardware circuit fitted on the miner’s gear to the ground control center. Findings: To test the working of proposed technique it is subjected to several test cases. Experiments have proved feasibility and good stability of the system. Using the proposed technology the network sensor scalability has been improved. Application/ Improvements: The deployment of a module of cognitive radio sensors is made on the miner’s gear to monitor the aforementioned parameters. Various traffic issues like routing algorithm, handoff problems are identified as the extension of the proposed cognitive radio networks.Keywords
Cognitive Radio (CR), Coal Mine, Monitoring System, Personal Protective Equipment (PPE), Tracking and Positioning, Wireless Sensor Networks (WSNs).Full Text
