Book contents
- Frontmatter
- Contents
- Authorship by Chapter
- Foreword
- Preface
- Part I Introduction to 802.11
- Part II 802.11 Quality of Service
- Chapter 3 WLAN QoS
- Chapter 4 Performance Understanding of IEEE 802.11 DCF and IEEE 802.11e EDCA
- Chapter 5 Cross-layer Optimized Video Streaming over Wireless Multi-hop Mesh Networks
- Part III 802.11 Security
- Part IV High Throughput 802.11
- Part V 802.11 Mesh Networks
- Part VI 802.11/Cellular Interworking
- Part VII Coexistence
- Part VIII 802.11 Network and Radio Resource Management
- Part IX 802.11 Range
- Part X 802.11 Hardware Design
- Part XI Wi-Fi Hotspots
- Part XII Wi-Fi Applications
- Part XIII Ultra WideBand (UWB)
- Part XIV Public Wireless Broadband
- Epilogue
- Index
Chapter 5 - Cross-layer Optimized Video Streaming over Wireless Multi-hop Mesh Networks
from Part II - 802.11 Quality of Service
Published online by Cambridge University Press: 10 December 2009
- Frontmatter
- Contents
- Authorship by Chapter
- Foreword
- Preface
- Part I Introduction to 802.11
- Part II 802.11 Quality of Service
- Chapter 3 WLAN QoS
- Chapter 4 Performance Understanding of IEEE 802.11 DCF and IEEE 802.11e EDCA
- Chapter 5 Cross-layer Optimized Video Streaming over Wireless Multi-hop Mesh Networks
- Part III 802.11 Security
- Part IV High Throughput 802.11
- Part V 802.11 Mesh Networks
- Part VI 802.11/Cellular Interworking
- Part VII Coexistence
- Part VIII 802.11 Network and Radio Resource Management
- Part IX 802.11 Range
- Part X 802.11 Hardware Design
- Part XI Wi-Fi Hotspots
- Part XII Wi-Fi Applications
- Part XIII Ultra WideBand (UWB)
- Part XIV Public Wireless Broadband
- Epilogue
- Index
Summary
The proliferation of wireless multi-hop communication infrastructures in office or residential environments depends on their ability to support a variety of emerging applications requiring real-time video transmission between stations located across the network. We propose an integrated cross-layer optimization algorithm aimed at maximizing the decoded video quality of delay-constrained streaming in a multi-hop wireless mesh network that supports quality-of-service (QoS). The key principle of our algorithm lays in the synergistic optimization of different control parameters at each node of the multi-hop network, across the protocol layers - application, network, medium access control (MAC) and physical (PHY) layers, as well as end-to-end, across the various nodes. To drive this optimization, we assume an overlay network infrastructure, which is able to convey information on the conditions of each link. Various scenarios that perform the integrated optimization using different levels (“horizons”) of information about the network status are examined. The differences between several optimization scenarios in terms of decoded video quality and required streaming complexity are quantified. Our results demonstrate the merits and the need for cross-layer optimization in order to provide an efficient solution for real-time video transmission using existing protocols and infrastructures. In addition, they provide important insights for future protocol and system design targeted at enhanced video streaming support across wireless mesh networks.
Introduction
Wireless mesh networks are built based on a mixture of fixed and mobile nodes interconnected via wireless links to form a multi-hop ad-hoc network.
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- Emerging Technologies in Wireless LANsTheory, Design, and Deployment, pp. 105 - 130Publisher: Cambridge University PressPrint publication year: 2007
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