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.
Results
Showing 1 to 19 of 19 for “"Relay selection"”.
-
Relay Selection Strategies for Multi-hop Cooperative Networks
<p>In this dissertation we consider several relay selection strategies for multi-hop cooperative networks. The relay selection strategies we propose do not require a central controller (CC). Instead, the relay selection is on a hop-by-hop basis. As such, these strategies can be implemented in a …
-
Adaptive Relay-Selection In Decode-And-Forward Cooperative Systems
… high improvements in performance is the best-relay selection scheme. In the best-relay selection scheme only one relaying nodes among the relays available in the system is selected to forward the source's message to the destination. The best relay is selected as the relay node that can achieve …
-
Prioritization, security and relay selection in network coded multiple access relay networks
… the issue of security in multiple access relay network. Security has always been a primary concern in wireless networks due to it broadcast nature of transmission. The intermediate relay nodes in a wireless network could be modified by adversary to transmit corrupted information. We …
-
Game Theoretical Approach for Joint Relay Selection and Resource Allocation in Mobile Device Networks
… by distortion reduction. Then, the source-relay pairing solution is optimized by a history tracing system using game theory to improve the expected overall distortion reduction of the entire network. Several parameters are introduced in the proposed solution, so the optimization would fit …
-
A Trust-Based Relay Selection Approach to the Multi-Hop Network Formation Problem in Cognitive Radio Networks
… This research will provide a cooperative relay selection framework that exploits the similarity of cognitive radio networks to social networks. It offers a multi-hop, reputation-based power control game for routing. In this dissertation, a social network model provides a humanistic …
-
Energy-efficient relay cooperation for lifetime maximization
We study energy-efficient power allocation among relays for lifetime maximization in a dual-hop relay network operated by amplify-and-forward relays with battery limitations. Power allocation algorithms are proposed for three different scenarios. First, we study the relay cooperation case where all …
-
Jointly optimal pre- and post-channel equalization and distributed beamforming in asynchronous bi-directional relay networks
We consider an asynchronous two-way relay network, consisting of two transceivers and multiple relays, where due to the propagation delays of different transceiver-relay paths being different, inter-symbol- interference (ISI) exists at both transceivers. In this work, pre- and post-channel …
-
Interference Management of Inband Underlay Device-toDevice Communication in 5G Cellular Networks
… as an underlay to cellular network, and how mode selection and power control approaches influence the degree of interference caused by D2D pairs to cellular users. Also, the research study continues to determine how the quality of D2D communication can be maintained with factors such as bad …
-
Analysis and Optimization of Cooperative Wireless Networks
… problem of power allocation, time scheduling and relay selection strategy in Decode-and-Forward cooperative networks. To overcome the non-convexity obstacle, the dual optimization method for non-convex problems \cite{Yu:2006}, is applied by exploiting the time-sharing properties of wireless OFDM …
-
Sum-rate optimal network beamforming and power allocation for single-carrier asynchronous bidirectional relay network
… multiple single-antenna amplify-and-forward (AF) relays. We assume that the network is asynchronous meaning that different transceiver-relay links cause significantly different propagation delays in the signal they convey. As a result, the end-to-end channel is not amenable to a frequency flat …
-
Energy-efficient multi-criteria packet forwarding in multi-hop wireless networks
… be assumed. Furthermore, methods where the selection of intermediate relaying nodes is performed at the transmitter-side do not adapt well to rapidly changing network environments. Although a few link-aware geographic forwarding schemes have been reported in the literature, the tradeoffs …
-
Precoder Design for Cooperative Cognitive Radio Systems
… transmission strategies at the source and relay nodes in cooperative underlay CR systems assumption are studied with an aim of achieving maximum possible throughput for the secondary system for two different scenarios: one with multiple secondary relay nodes with a single antenna at each of …
-
On enhancing connectivity and efficiency in 5G and emerging 6G mobile networks
… wireless systems, including base station selection, interference management, spectral efficiency enhancement, latency reduction, and feedback overhead, in support of Industry 4.0, massive machine-type communication (mMTC), and ultra-reliable low-latency communication (URLLC). The thesis …
-
Resource allocation for multi-cell OFDMA based cooperative relay network
… idea is that intermediary nodes, called relay stations (RSs), who are neither the data source nor destination, are used to assist in communication between sender and receiver. In order to maximise their performance, networks which employ RSs require a new resource allocation and …
-
Relay assisted device-to-device communication with channel uncertainty
… idle user equipment can be exploited to serve as relays to enforce device-to-device communication. The availability of potential relay user equipment creates a problem: a way to select the relay user equipment. Moreover, unlike infrastructure relays, user equipment are carried around by people and …
-
Characterisation and performance analysis of random linear network coding for reliable and secure communication
… (ii) investigate the performance of RLNC in relay assisted networks and propose a new cross-layer RLNC-aided cooperative scheme for reliable communication, (iii) characterize the secrecy feature of RLNC and propose a new physical-application layer security technique for the purpose of …
-
Node Selection, Synchronization and Power Allocation in Cooperative Wireless Networks
… as unconditionally sharing of one's resources to relay for other nodes is unjustified. On the other hand, a particular network node may try to utilize resources from other nodes and also share its own resources so as to improve its own performance, which in turn may prompt other nodes to behave …
-
UAV-Enabled Wireless Communications: Deployment, Optimization, and Analysis
… solution, as aerial base stations (BSs) or relays, in wireless communications systems. Due to their high likelihood of line-of-sight (LoS) links and ease of deployment, they play a crucial role in providing faster and better wireless network access and service where extra network resources …