Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"channel assignment"”.
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Traffic-Aware Channel Assignment for Multi-Transceiver Wireless Networks
This dissertation addresses the problem of channel assignment in multi-hop, multi-transceiver wireless networks. We investigate (1) how channels can be assigned throughout the network to ensure that the network is connected and (2) how the channel assignment can be adapted to suit the current …
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ALGORITHMS FOR ROUTING AND CHANNEL ASSIGNMENT IN WIRELESS INFRASTRUCTURE NETWORKS
… network, they employ multiple orthogonal channels over multiple ra-dios at the nodes. In addition, nodes in these networks employ directional antennasas radios to improve spatial throughput. This dissertation develops algorithms forrouting and broadcasting with channel assignment in such …
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Optimal Access Point Selection and Channel Assignment in IEEE 802.11 Networks
… of access points (APs) in the demand areas and assignment of radio frequencies to each AP. Coverage and capacity are some key issues when placing APs in a demand area. APs need to cover all users. A user is considered covered if the power received from its corresponding AP is greater than a …
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Distance-1 constrained channel assignment in single radio wireless mesh networks
This thesis addresses channel assignment and random medium access design for single-radio multi-channel mesh networks. Two prior approaches include: (i) designing MAC protocols that dynamically select channels based on local information and (ii) partitioning the mesh into subnetworks with different …
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Channel assignment strategies for throughput enhancement in high density wireless local area networks
… degrade throughputs unless new challenges in channel assignment are addressed effectively. This thesis deals with the investigation and development of practical channel assignment schemes in high density WLANs that can provide enhanced throughputs.
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Solutions for Dynamic Channel Assignment and Synchronization Problem for Distributed Wireless Multimedia System
… personal communication service systems, a channel assignment problem and synchronization problems should be solved efficiently. Recent demand for mobile telephone service have been growing rapidly while the electro-magnetic spectrum of frequencies allocated for this purpose remain limited. …
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Channel assignment algorithms and blocking probability analysis for connection-oriented traffic in wireless networks
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
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Improving the Capacity in Wireless Ad Hoc Networks through Multiple Channel Operation: Design Principles and Protocols
… the available frequency into several orthogonal channels, which can be used simultaneously within a neighborhood, increasing capacity by exploiting multiple channels becomes particularly appealing. To improve the capacity of wireless ad hoc networks by exploiting multiple available channels, I …
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Medium Access Control in Cognitive Radio Networks
… bands, and secondary users must vacate the channel where incumbent user signals are detected. A CR network is composed of secondary users equipped with CRs and it can coexist with incumbent users in licensed bands under the OSS paradigm. The coexistence between incumbent users and secondary …
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Channel parameter tuning in a hybrid Wi-Fi-Dynamic Spectrum Access Wireless Mesh Network
This work addresses Channel Assignment in a multi-radio multi-channel (MRMC) Wireless Mesh Network (WMN) using both Wi-Fi and Dynamic Spectrum Access (DSA) spectrum bands and standards. This scenario poses new challenges because nodes are spread out geographically so may have differing allowed …
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Game-Theoretic Analysis of Topology Control
… consider two parameters, viz. transmit power and channel, and study the impact of controlling these on the emergent topologies. We first examine the impact of node selfishness on the network connectivity and energy efficiency under two levels of selfishness: (a) nodes cooperate and forward packets …
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An Introduction to List Colorings of Graphs
… is graph colorings. A graph coloring is an assignment of integers to the vertices of a graph so that no two adjacent vertices are assigned the same integer. This problem frequently arises in scheduling and channel assignment applications. A list coloring of a graph is an assignment of …
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Optimal forwarding in wireless networks: opportunistic network coding
… overcoming the interference using scheduling, channel assignment, and many other mechanisms. In recent years, there has been growing attention to methods that aim to take advantage of the broadcast nature of the wireless medium and the ability of nodes to overhear their neighbors’ …
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Evaluation of Dynamic Channel and Power Assignment Techniques for Cognitive Dynamic Spectrum Access Networks
… main contributions with respect to the Dynamic Channel and Power Assignment (DCPA) problem. DCPA refers to the allocation of transmit power and frequency channels to links in a cognitive dynamic spectrum network so as to maximize the total number of feasible links while minimizing the aggregate …
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Some Modeling and Optimization Problems in Cognitive Radio Ad Hoc Networks
… spectrum access (DSA)) and interoperability (via channel switching). It is envisioned that CR will be employed as a general radio platform upon which numerous wireless applications can be implemented. For both theoretical and practical purposes, it is important for network researchers to model a …
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Delay QoS Provisioning and Optimal Resource Allocation for Wireless Networks
… the throughput performance in the two-hop relay channel, two-way relay channel, and multi-source multi-destination relay networks is analyzed. Finite-blocklength codes are considered for the two-hop relay channel, and optimization over the error probabilities is investigated. For the multi-source …
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Distributed medium access control for an enhanced physical-link layer interface
… enhanced interface is supported by a distributed channel coding theory, which equips each physical layer user with an ensemble of channel codes. The coding theory allows each transmitter to choose an arbitrary code to encode its message without sharing such a decision with the receiver. The …
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Wireless Body Area Networks: Efficient Coexistence by Interference Management and Avoidance
… Next, in order to incorporate variations in channel assignment, based on bodydynamics mobility within each individual WBAN and amongst multiple WBANs, a prediction algorithm is proposed to feed in these dynamics and accordingly update resource allocation. This proposal maximises the resource …
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Wireless Body Area Networks: Efficient Coexistence by Interference Management and Avoidance
… Next, in order to incorporate variations in channel assignment, based on bodydynamics mobility within each individual WBAN and amongst multiple WBANs, a prediction algorithm is proposed to feed in these dynamics and accordingly update resource allocation. This proposal maximises the resource …
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