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Uplink Multi-Cell Non-Cooperative Power Allocation Game Algorithm for OFDMA Cellular Networks

Uplink Multi-Cell Non-Cooperative Power Allocation Game Algo...

引用

international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： Tiankui Zhang Chunyan Feng Geng Su Lin Xiao School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Electronic Engineering and Computer Science Queen''s Mary University of London London UK

The multi-cell power allocation problem is investigated in orthogonal frequency division multiplexing access (OFDMA) cellular networks. For user fairness, a multi-cell non-cooperative power allocation game (MNPG) is defined, which gives a minimum performance guarantee for cell-edge users. Based on MNPG, an uplink distributed power allocation (UDPA) algorithm is proposed for practical system. A performance comparison is given with different user numbers and these results show that UDPA has a small reduction in cell average throughput lost but a large gain on cell-edge user throughput.

关键词： Land mobile radio cellular systems Game theory OFDM Interchannel interference Radiofrequency interference Resource management Power engineering and energy Base stations Throughput Radio control

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A Novel Cluster Reformation Scheme to Improve Key Pre-distribution for Wireless Sensor Networks

A Novel Cluster Reformation Scheme to Improve Key Pre-distri...

引用

international conference on advances in computing, control, & Telecommunication Technologies (ACT)

作者： R. Kishore S. Radha G. Dipika A. Pavithra R. Aarthi Dept. of ECE Sri Sivasubramaniya Nadar Coll. of Eng. Chennai India

Wireless sensor networks are becoming increasingly popular, as their usage is extended to a wide range of applications. Security plays a pivotal role in wireless sensor networks, as the data handled by the network are often sensitive. Since the network is vulnerable to various types of attacks there is a need to build efficient security services in them for secure data communication. The processing and energy limitation of the sensor nodes pose a greater challenge and make the implementation of complex security measures impossible. A variety of key pre distribution schemes were proposed in the literature to provide security in wireless sensor networks. Inspite of various improvements in the key distribution schemes the nodes are still getting compromised and a separate mechanism is not provided to filter out the malicious node. In this paper a mathematical model for novel cluster reformation technique is proposed to improve the key pre distribution scheme along with the malicious node detection and removal. Here the process of manipulation of information in the key spaces is included along with regrouping of nodes to improve the resilience of the network. Cluster reformation significantly decreases the number of nodes which provide the intruder with useful information thereby decreasing the chances of the network getting compromised .The results show that the cluster gets reformed effectively as the number of nodes getting compromised approaches the threshold i.e. the value above which there is a possibility of the entire communication getting compromised.

关键词： Wireless sensor networks Data security Data communication Computer networks Distributed computing Telecommunication computing Telecommunication control Educational institutions Energy measurement Filters

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GSM Network Based Z-axis Position control System

GSM Network Based Z-axis Position Control System

引用

international conference on advances in computing, control, & Telecommunication Technologies (ACT)

作者： S. Hemnath V. Sridevi Department of Instrumentation and Control Engineering National Institute of Technology Tiruchirappalli India

This paper presents the design of a GSM network based z-axis position controlling system for remote monitoring and control. Using this positioning system the height of an object can be controlled and monitored through SMS from any location where GSM network is available. The desired position of an object is sent to the GSM modem by the user through SMS. The embedded system in the positioning device has an algorithm which acquires the current position of the object, processes, transmits and stores it in the built-in Flash memory of microcontroller. Once the desired programmed trigger level of the signal is reached, the microcontroller downloads the current position of the object to the GSM modem. Then, GSM dials the pre-sorted mobile number/s and transmits the current position as a normal SMS to the user, thus making remote monitoring and control of positioning system is easier than the existing techniques.

关键词： GSM Position control control systems DC motors communication system control Remote monitoring Embedded system Acoustic sensors Microcontrollers Automatic control

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ANFIS Approach for Navigation of Mobile Robots

ANFIS Approach for Navigation of Mobile Robots

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international conference on advances in Recent Technologies in communication and computing, ARTCom

作者： Mukesh Kumar Singh Dayal R. Parhi Jayanta Kumar Pothal Government Engineering College Bilaspur Bilaspur Chhattisgarh IN Department of Mechanical Engineering National Institute of Technology Rourkela Orissa India Dept. of Mech. Eng. Nat. Inst. of Technol. Rourkela Rourkela India

This paper, discusses about navigation control of mobile robot using adaptive neuro-fuzzy inference system (ANFIS) in a real word dynamic environment. In the ANFIS controller after the input layer there is a fuzzy layer and rest of the layers are neural network layers. The adaptive neuro-fuzzy hybrid system combines the advantages of fuzzy logic system, which deal with explicit knowledge that can be explained and understood, and neural network, which deal with implicit knowledge, which can be acquired by learning. The inputs to fuzzy logic layer are front obstacle distance, left obstacle distance, right obstacle distance and target steering. A learning algorithm based on neural network technique has been developed to tune the parameters of fuzzy membership functions, which smooth the trajectory generated by the fuzzy logic system. Using the developed ANFIS controller, the mobile robots are able to avoid static and dynamic obstacles, and reach the target successfully in cluttered environments. The experimental results agree well with the simulation results, proves the authenticity of the theory developed.

关键词： Navigation Mobile robots Fuzzy logic Neural networks Robot control Adaptive systems Fuzzy neural networks control systems Programmable control Adaptive control

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Adaptive Power control for 4G OFDMA Systems on Frequency Selective Fading Channels

Adaptive Power Control for 4G OFDMA Systems on Frequency Sel...

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international conference on Wireless communications, networking and Mobile computing (WiCom)

作者： Rainer Schoenen Fei Qin Department of Communication Networks (ComNets) Faculty 6 RWTH Aachen University Germany

Future cellular radio systems aim at maximizing the spectral efficiency. OFDMA radio resources are the scarce good with their dimensions bandwidth, time and space. Due to frequency selective fading the effective path-loss varies in all dimensions. Adaptive algorithms are available which allocate the best modulation and coding scheme depending on the expected SINR, as well as dynamic subchannel assignment which aims to choose the best subchannel for each user. This already boosts the performance of OFDMA system. However, these algorithms alone do not touch the transmitted power per subchannel. On the cell edge this is fine, but large areas are covered with a transmitted power exceeding the usually required SINR. In this paper we introduce a power control which saves power on the users within the cell. This leads to a reduced interference into neighbor cells, especially for future reuse one systems. Also some of the saved power can be used to boost transmissions at the cell edge. In this paper we introduce an adaptive power control concept and arrange it into a closed loop control system which contains blocks for all adaptive algorithms for modulation, power, subchannel usage and channel quality indication.

关键词： Programmable control Adaptive control Power control Fading Adaptive algorithm Signal to noise ratio Land mobile radio cellular systems Bandwidth Modulation coding Interference

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Enhanced Local Repair AODV (ELRAODV)

Enhanced Local Repair AODV (ELRAODV)

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international conference on advances in computing, control, & Telecommunication Technologies (ACT)

作者： Jagpreet Singh Paramjeet Singh Shaveta Rani Department of Computer Science & Engineering G.T.B. Khalsa Institute of Engineering & Technology Malout Punjab India Department of Computer Science & Engineering G.Z.S. College of Engg. & Technology Bathinda Punjab India

AODV is one of the most common reactive protocols used in MANET. This paper proposes enhancement in popular on demand routing protocol AODV by improving its local repair mechanism. Enhanced local repair AODV (ELRAODV) makes mobile nodes more aware of the local connectivity by extending original HELLO to NHELLO message in AODV as proposed in. That extra information of the local neighbors allows ELRAODV to repair a route by sending a unicast request instead to broadcast in original AODV. The results show that ELRAODV performs better in terms of routing overhead, end to end delay than classic AODV. The simulation is done through network Simulator-2 (ns2).

关键词： Mobile ad hoc networks Routing protocols Broadcasting Network topology Computer science Computational modeling Wireless LAN Spread spectrum communication Telecommunication computing Telecommunication control

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A Cross-Layer Distributed Call Admission control

A Cross-Layer Distributed Call Admission Control

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IEEE international conference on Wireless and Mobile computing, networking And communications (WiMob)

作者： Osama Baldo XBee International Munich Germany

A wireless mesh network (WMN) is a collection of wireless network nodes that communicate among themselves. Unlike wireless local area networks, WMNs are self configuring systems, where each node can relay messages on behalf of others. This allows coverage of a much larger geographical area than if all nodes needed to be able to communicate directly with a central node. WMNs promise to deliver wireless services for a large variety of applications in personal, local, campus, and metropolitan areas. To fulfill their potential, WMNs require fast, efficient & accurate admission control policy to allow connections access with minimal impact on existing connections & full consideration for network congestion. This paper presents a two part admission control mechanism for WMNs, a route admission control(RAC) and a connection admission control(CAC). The RAC part uses bandwidth estimates (BWEST) of the available traffic resources. This BWEST is driven from the measured traffic at the specific WMN node during a fixed period of time. The available bandwidth is calculated at each node and is updated regularly, and used by the admission controller to route new incoming connections. Connection acceptance during the CAC part is decided based on the call dropping probability. Numerical results show considerable improvement in the admission control responsiveness and network throughput. It also shows that BWEST becomes more accurate under heavy traffic conditions.

关键词： Call admission control Admission control communication system traffic control Wireless mesh networks Bandwidth Wireless LAN Relays Urban areas Time measurement Delay

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Selfish Misbehavior Detection in CSMA Cooperative Networks with HARQ

Selfish Misbehavior Detection in CSMA Cooperative Networks w...

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IEEE international conference on Wireless and Mobile computing, networking And communications (WiMob)

作者： Sintayehu Dehnie Stefano Tomasin Electrical and Computer Engineering Department Polytechnic Institute of New York University Brooklyn NY USA Department of Information Engineering University of Padova Padova Italy

In wireless cooperative transmissions, nodes may deviate from the cooperative protocol to reduce energy consumption while still reaping the benefits of other nodes' cooperation. Misbehavior is implemented by refraining from responding to cooperation request, mimicking adverse channel conditions. From time to time (with a given percentage) cooperations requests are accepted in order to avoid being detected as selfish. In this paper, we propose a technique for detecting misbehavior of nodes in an ad hoc network using carrier sense multiple access (CSMA) and automatic repeat request (ARQ) protocol. Each node can detect control packets of ARQ among source, destination and cooperating nodes, and collect statistics on their decoding probability. Selfish behavior is detected based on uniformly most powerful (UMP) test which yields the minimum miss detection probability for a given false alarm probability.

关键词： Multiaccess communication Automatic repeat request Probability Wireless application protocol Energy consumption Ad hoc networks Access protocols Automatic control Statistics Decoding

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Cooperative Boundaries Tracking Model with a Mobile Sensor Network

Cooperative Boundaries Tracking Model with a Mobile Sensor N...

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international conference on networking and Digital Society, ICNDS

作者： Guo-mei Wang Xiao-wei Chen Yuan-jing Feng Coll. of Comput. Sci. & Technol. Guizhou Univ. Guiyang Zhejiang University of Technology

Inspired from social swarm intelligence, a cooperative boundaries tracking model with a mobile sensor network based on social foraging swarm behavior. In the model, the nodes of mobile sensor network are viewed as simple intelligent individuals of social swarm. The cooperative moving of the individuals is driven by sensed distribution environment. For boundaries tracking problems with mobile sensor network, the cooperative control strategy and algorithm is proposed, which supposed that global information of boundary curves is given and can be communicated between individuals. The stable analysis of the algorithm is provided. Finally, the experiment results with given boundary curve show the efficiently of the algorithm.

关键词： Intelligent sensors Angular velocity control Educational institutions communication system control Sensor arrays Mobile computing Particle swarm optimization Intelligent networks Sensor systems Vehicles

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Digital Signal Modulator on FPGA Using on the Fly Partial Reconfiguration

Digital Signal Modulator on FPGA Using on the Fly Partial Re...

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international conference on advances in computing, control, & Telecommunication Technologies (ACT)

作者： Sheetal U. Bhandari Shaila Subbaraman Shashank Pujari International Institute of Information Technology Pune India Walchand College of Engineering and Technology Sangli India

communication receivers supporting multiple standards and modulation techniques are thirst of the time. Military has initiated technology like Software Defined Radio (SDR) which supports various network types and demodulation techniques. To test such devices all types of modulators which can source all possible test inputs for such receivers are needed. Instead of using off-the-shelf but costly instruments to test various communication systems, FPGA-based Digital signal modulator (DSM) is cost-effective solution. The paper discusses the effectiveness of using Partial Reconfiguration (PR) feature of FPGA for FPGA based DSM. Availability of more modulators in DSM demands more FPGA resources, but in testing set up only one type of modulator of DSM is required at any point of time. Hence the resources utilized by other modulation techniques become overhead. In order to reduce this overhead PR is an ideal solution. As a case study an implementation scheme of QAM and QPSK modulators using difference based PR on xc3s400-5pq208 device is presented. Results of the implementation are included in the paper. Result indicates use of PR will allow realization of versatile DSM on small FPGA.

关键词： Digital modulation Field programmable gate arrays Receivers communication standards Software radio Demodulation Instruments System testing Availability Quadrature amplitude modulation

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