Electronics and Instrumentation Engineering

Goa, India

Electronics and Instrumentation Engineering

Goa, India
SEARCH FILTERS
Time filter
Source Type

Sreejith V.,BITS Pilani K K Birla | Anupama K.R.,Electronics and Instrumentation Engineering | Gudino L.J.,BITS Pilani K K Birla | Suriyadeepan R.,BITS Pilani K K Birla
2015 21st National Conference on Communications, NCC 2015 | Year: 2015

Area exploration in WSN is used for a multitude of applications from data collection to network maintenance. In this paper, we propose a new approach - Max-Gain approach to explore an area with obstacles by modifying the utility function of frontier-based approach. The proposed approach moves the mobile nodes to a distant unexplored optimal position rather than directing it to a near frontier. The main focus of this paper is the fast area exploration using mobile nodes. We extend this approach to recover partitions in a disconnected network and hence restore connectivity. The results indicate that our approach guarantees fast area exploration with minimum communication overhead. Proposed area exploration approach is not limited to wireless sensor networks, but to any area exploration applications using mobile units. © 2015 IEEE.


Gawas M.A.,BITS Pilani K K Birla | Gudino L.J.,BITS Pilani K K Birla | Anupama K.R.,Electronics and Instrumentation Engineering
International Conference on Ubiquitous and Future Networks, ICUFN | Year: 2016

To support QoS for a multimedia traffic, IEEE 802.11e standard Enhanced distributed channel access (EDCA) has been proposed. However, the EDCA is more focused on providing quality of service(QoS) solution at the MAC layer, which is necessary, but perhaps not sufficient as the layered TCP stack architecture does not satisfy the QoS demands in ad hoc network. This is due to the fact that routing protocol is responsible for the successful packet delivery and QoS Support. The conventional single scalar routing protocols are not suitable for high traffic QoS sensitive multimedia traffic load on Mobile ad Hoc Networks (MANETs). The paper proposes a Cross layer Multimetric link disjoint Multipath Routing (CMMR) protocol based on distinct QoS constraints. The paper uses cross-layer communications to consider multiple layer metrics like MAC queue utilization, node density degree, and mobility factor to achieve channel state awareness and keep the up to date status of the route in terms of QOS proficiency at each intermediate node. The proposed algorithm is validated with an extensive simulation with high real time traffic using NS3. The results show significant improvement of CMMR in terms of packet delivery, and end-to-end delay. © 2016 IEEE.


Sreejith V.,BITS Pilani K K Birla | Khandelwal P.,Electronics and Instrumentation Engineering | Anupama K.R.,BITS Pilani K K Birla | Gudino L.J.,BITS Pilani K K Birla
2016 8th International Conference on Communication Systems and Networks, COMSNETS 2016 | Year: 2016

Scenarios where the sensor nodes themselves are mobile, introduces a new dimension of problems in sensor network. This paper presents a mobility vector based neighbour selection for a mixed deployment of mobile and static Wireless Sensor Network. The proposed approach uses the velocity of the mobile node and the residual energy of the static node to select a neighbour. Multichannel based MAC protocol is adopted for an interference free communication. The protocol was simulated and evaluated against MA-MAC protocol. Simulation results indicate that the proposed approach performs better. Proof of Concept of proposed approach was done using Berkley motes. © 2016 IEEE.


Gawas M.A.,BITS Pilani K K Birla | Gudino L.J.,BITS Pilani K K Birla | Anupama K.R.,Electronics and Instrumentation Engineering
2015 International Conference on Signal Processing and Communication, ICSC 2015 | Year: 2015

Modern wireless devices, which implement the 802.11b standard, utilizes multiple transmission rates in order to accommodate a varied range of channel conditions. Many rate adaptation algorithms proposed, utilizes the multi data rate, primarily according to the current channel quality. Most algorithms do not consider congestion around the network and proper determinant to identify it. In multi rate Ad hoc network, due to mismatched link rate, the node interface queues get overloaded. Thus causing congestion, which consequently result in packet loss, further reducing effective throughput. In this paper, we propose a novel Cross layer QoS aware Multi Rate routing protocol (CQMR) based on nodes queuing load and link state. CQMR focuses on cross-layer interactions between PHY, MAC and Network layer to utilize these multi-rate supports from 802.11b. CQMR algorithm chooses the optimal path with effective data rate and through a less congested network, which is compatible with existing 802.11 implementations. We have implemented CQMR in the NS-2 simulator and conducted extensive simulation studies over network diversity. Our analysis shows that CQMR protocol significantly increases the network performance in the packet delivery ratio and throughput. © 2015 IEEE.


Sreejith V.,BITS Pilani K K Birla | Anupama K.R.,Electronics and Instrumentation Engineering | Gudino L.J.,BITS Pilani K K Birla | Suriyadeepan R.,BITS Pilani K K Birla
2015 International Conference on Control, Communication and Computing India, ICCC 2015 | Year: 2015

Streaming multimedia data in WSN is a challenge due to constraints such as bandwidth, energy and delay. Moreover, it is not economical to have multimedia sensors integrated with static nodes in the field. In this paper, we propose the use of mobile sensor nodes, which are equipped with multimedia sensors for event monitoring. These mobile entities are capable of streaming high bandwidth data by splitting it and routing the packet to the base station using Frequency Division Multiplexer (FDM) modules. This is done with the support of multi-channel disjoint path routing aided with the static WSN deployed. Experiments were done using MicaZ and TelosB motes to evaluate the performance with the help of our custom designed robotic vehicle. The paper adopts a node disjoint multi-path routing protocol for establishing parallel paths between the sender and the receiver. Experimental results indicate that the proposed approach can be effectively used for transferring high bandwidth data to the base station. Multimedia Streaming, Multichannel MAC, Mobile WSN. © 2015 IEEE.


Anupama K.R.,Electronics and Instrumentation Engineering | Gudino L.J.,BITS Pilani K K Birla | Gawas M.A.,BITS Pilani K K Birla
2016 10th International Symposium on Communication Systems, Networks and Digital Signal Processing, CSNDSP 2016 | Year: 2016

The dominance of multimedia traffic over the internet, coupled with the rising number of applications of MANETs, has made Quality of Service (QoS) a major concern. The IEEE 802.11e standard enhanced distributed channel access(EDCA) has been proposed as an enhancement of 802.11 standard, which provides QoS at MAC layer with a service differentiation scheme for high priority traffic. But IEEE 802.11e has not adequately addressed the issue of handling best effort traffic data flows through contention-based networks which in turn results in TCP performance degradation. To enhance the best effort traffic performance in 802.11e with high-quality of service to maximize the system throughput, we propose a novel scheme called, Adaptive Best Effort Traffic Scheduler for EDCA(ABET-EDCA). In this scheme, TCP packets get prioritized by dynamically adapting to contention window parameters. In addition to this, traffic class monitors the MAC queue and computes TXOP limits value at runtime. This results in reduced delay and loss factor. Additionally, we incorporate the cross layer approach by exploiting the physical and MAC layer information to initiate corrective measures at the Transport and Network layer to enhance best effort traffic performance. The simulation conducted shows the significant improvement in TCP performance in terms of goodput, delay and throughput even under high loads compared to EDCA. © 2016 IEEE.


Gawas M.A.,BITS Pilani K K Birla | Gudino L.J.,BITS Pilani K K Birla | Anupama K.R.,Electronics and Instrumentation Engineering
2015 International Conference on Advances in Computing, Communications and Informatics, ICACCI 2015 | Year: 2015

Mobile Ad Hoc Networks (MANETs) are a self organizing and adaptive wireless networks. Currently MANETs possess an advanced challenge in providing Quality of Service( QoS) support for real time application data streaming through the network. These applications are delay sensitive and get affected due to congestion in the network. Thus, performance degrades due to high data loss, frequent link breakage and excessive retransmission. The strict layered network structure makes even more difficult to provide solutions for such issues. We propose a protocol which cooperates between adjacent layers and performs cross layer communication. We propose a novel QoS routing for MANET called Cross Layer Best effort QoS aware routing protocol (CLBQ, which considers the metric of link quality, data rates and MAC delay as the QoS parameters. The proposed protocol implements cross layer interaction between PHY, MAC and Network layer. The simulation results conducted shows best effort QoS service to the network in discovering the route and data transfer. Our analysis shows that the protocol has improved throughput and low network overhead. © 2015 IEEE.


Mane P.,Electronics and Instrumentation Engineering | Talati N.,Electronics and Instrumentation Engineering | Riswadkar A.,Electronics and Instrumentation Engineering | Jasani B.,Electronics and Instrumentation Engineering | Ramesha C.K.,Electronics and Instrumentation Engineering
Proceedings of the IEEE International Conference on VLSI Design | Year: 2015

Memristor based nanocrossbar layer fabricated on CMOS layer has shown tremendous potential as high density memory and in reconfigurable logic architectures. Instead of having predesigned Configurable Logic Blocks (CLBs) and memory for reconfiguration as in FPGA, they can be instantiated in nanocrossbar memory as the need arises. We have shown in this paper, the novel design of NOR block as basic unit of computation for in-memory calculations to implement on CMOL FPGA architecture. This block implements its function using material implication. The proposed scheme is against the naturally arising boolean logic based NOR block in CMOL FPGA. © 2015 IEEE.


Kishore R.,Electronics and Instrumentation Engineering | Ramesha C.K.,Electronics and Instrumentation Engineering | Sharma V.,Electronics and Instrumentation Engineering | Joshi R.,Electronics and Instrumentation Engineering
2014 IEEE National Conference on Communication, Signal Processing and Networking, NCCSN 2014 | Year: 2015

Cognitive radio will drive the future of wireless/radio communication by efficient utilization of underutilized spectrum (vacant space). Spectrum sensing and primary user detection is the main challenge in cognitive radio systems. Energy based sensing is a common spectrum sensing method for cognitive radio since the information about the licensed user signal are not required for the detection process. In this paper, the performances of the energy detection technique are analyzed over Gaussian Noise Channel and different fading channels such as Rayleigh and Rician Channel based on Receiver Operating Characteristics (ROC) and probability of detection (Pd) versus Signal to Noise Ratio (SNR) curves through simulation using MATLAB. The analysis is validated with theoretical results. © 2014 IEEE.


Mane P.,Electronics and Instrumentation Engineering | Talati N.,Electronics and Instrumentation Engineering | Riswadkar A.,Electronics and Instrumentation Engineering | Raghu R.,Electronics and Instrumentation Engineering | Ramesha C.K.,Electronics and Instrumentation Engineering
Microelectronics Journal | Year: 2015

Most commercial Field Programmable Gate Arrays (FPGAs) have limitations in terms of density, speed, configuration overhead and power consumption mostly due to the use of SRAM cells in Look-Up Tables (LUTs), configuration memory and programmable interconnects. Also, hardwired Application Specific Integrated Circuit (ASIC) blocks designed for high performance arithmetic circuits in FPGA reduce the area available for reconfiguration. In this paper, we propose a novel generalized hybrid CMOS-memristor based architecture using stateful-NOR gates as basic building blocks for implementation of logic functions. These logic functions are implemented on memristor nanocrossbar layers, while the CMOS layer is used for selection and connection of memristors. The proposed pipelined architecture combines the features of ASIC, FPGA and microprocessor based designs. It has high density due to the use of nanocrossbar layer and high throughput especially for arithmetic circuits. The proposed architecture for three input one output logic block is compared with conventional LUT based Configurable Logic Block (CLB) having the same number of inputs and outputs; which shows 1.82 x area saving, 1.57 x speedup and 3.63 x less power consumption. The automation algorithm to implement any logic function using proposed architecture is also presented. © 2015 Elsevier Ltd. All rights reserved.

Loading Electronics and Instrumentation Engineering collaborators
Loading Electronics and Instrumentation Engineering collaborators