Redesign of next-generation broadband-network architectures with limited cooperation, cross-layer scheduling, and dynamic resource allocation
Abstract/Contents
- Abstract
- The explosion of internet-enabled devices in home networks, such as smartphones, tablets, laptops, and internet-protocol TV (IPTV), threatens to choke current wire-line and wireless broadband-access speeds and demands an order-of-magnitude improvement. Furthermore, the heterogeneous nature of these devices' traffic requires intelligent management of the access networks' quality-of-service (QoS) guarantees, especially for video traffic. This dissertation investigates the redesign of broadband-access architectures by using limited cooperation to deliver an order-of-magnitude increase in data-rates, and by using cross-layer scheduling and pre-caching protocols to balance the QoS requirements of both data and video traffic. The first part of the dissertation investigates the gains of cooperative communication systems when only a limited number of receivers cooperate. The cooperation benefits in terms of data-rate gains can diminish significantly in such limited cooperation scenarios by using the state-of-the-art algorithms that fail to account for the interference between cooperative and non-cooperative links. Novel dynamic spectrum management (DSM) techniques are proposed to manage such interference and the proposed techniques allow these limited cooperation scenarios to retain most of the cooperation benefits in next-generation cooperative systems while maintaining the performance of legacy non-cooperative systems. Chapter 2 focuses on the theoretical bounds in terms of achievable rate-regions, while Chapter 3 proposes distributed algorithms that can approximate the theoretical performance with low-complexity and practically implementable protocols in wire-line digital-subscriber-line (DSL) systems. The second part of the dissertation investigates the use of cross-layer protocols to balance QoS requirements of heterogeneous data, video, and other multimedia application traffic. Chapter 4 proposes cross-layer protocols for distributed scheduling that exploit the channel or noise cyclo-stationarity to enable higher throughputs for low-priority data traffic while meeting the QoS guarantees of high-priority video traffic, thereby promising to balance internet uplink speeds for both high-priority video traffic and low-priority data traffic in home networks. Chapter 5 proposes novel cross-layer pre-caching protocols to meet the increasing demands of IPTV traffic on wire-line broadband-access networks. IPTV viewers tend to watch at similar periods during the day (e.g. 6-9 PM or Friday nights), creating peak-bandwidth demands on interference-limited networks when there is insufficient physical-layer bandwidth to meet these demands. The proposed protocol estimates the impact of future peak-demand periods on interference-limited networks and pre-allocates bandwidth to deliver the forecasted videos and avoid the peak-demand periods.
Description
| Type of resource | text |
|---|---|
| Form | electronic; electronic resource; remote |
| Extent | 1 online resource. |
| Publication date | 2013 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Associated with | Chowdhery, Aakanksha |
|---|---|
| Associated with | Stanford University, Department of Electrical Engineering. |
| Primary advisor | Cioffi, John M |
| Primary advisor | El Gamal, Abbas A |
| Thesis advisor | Cioffi, John M |
| Thesis advisor | El Gamal, Abbas A |
| Thesis advisor | O'Neill, Daniel |
| Advisor | O'Neill, Daniel |
Subjects
| Genre | Theses |
|---|
Bibliographic information
| Statement of responsibility | Aakanksha Chowdhery. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis (Ph.D.)--Stanford University, 2013. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2013 by Aakanksha Chowdhery
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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